JP2016121867A - Abnormality detection device, air conditioning device, air conditioning system, air conditioning control device, abnormality detection method, air conditioning control method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect abnormality of an air conditioner even though coolant pressure is maintained to a fixed value by controlling the frequency of a compressor or the rotational speed of an outdoor fan.SOLUTION: A centralized controller 20 includes a measurement parameter reception part 21, an abnormality determination part 22, and a determination result output part 23. Then, the measurement parameter reception part 21 receives operation state information showing an operation state of a control apparatus including the frequency of a compressor or the rotational speed of an outdoor fan from the air conditioner when an air conditioner performs a cooling operation or a heating operation, the abnormality determination part 22 determines whether the operation state information satisfies a prescribed condition, and the determination result output part 23 outputs information showing that abnormality occurs in the air conditioner in the case that the operation state information is determined to satisfy the prescribed condition.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an abnormality detection device, an air conditioning device, an air conditioning system, an air conditioning control device, an abnormality detection method, an air conditioning control method, and a program.

  Conventionally, a technique for detecting refrigerant shortage using the pressure of the refrigerant has been known (see, for example, Patent Document 1).

  In Patent Document 1, a compression ratio detector having pressure sensors attached to the discharge port and the suction port of the compressor is provided, the electronic expansion valve is fully opened, and the compression ratio detected by the compression ratio detector is a predetermined compression ratio. In the following cases, an air conditioner is described in which the operation is stopped and at the same time, an abnormality signal indicating that the refrigerant is insufficient is output and an abnormality has occurred.

  On the other hand, a technique for detecting a refrigerant leak using not only the pressure and temperature of the refrigerant but also information on the device driving means has been known (see, for example, Patent Document 2).

  In Patent Document 2, a plurality of measured amounts of a device that sucks and discharges fluid is measured, a correlation between the measured plurality of measured amounts is calculated, and the measurement measured when the operation is determined to be normal A state quantity that is a calculated value such as an average value obtained from the quantity, and at least a state quantity that includes a correlation between a plurality of calculated quantities is stored as a normal state quantity of the device, and is in a normal state It is described that in a device diagnostic apparatus that calculates a state quantity in an abnormal state by calculating from a quantity, a measured quantity measured during operation of the equipment is an electric quantity that drives the equipment driving means.

  Further, conventionally, a technique for detecting the clogged state of the filter based on the accumulated operation time has been known (see, for example, Patent Document 3).

  In Patent Document 3, the rotation time of the indoor fan is accumulated, and when the accumulated time exceeds a predetermined threshold, the filter is predicted to be clogged, and from the rotation start time of the indoor fan. An air conditioner is described in which the integrated value per unit time is increased until a predetermined time has elapsed, and the integrated value is decreased after the predetermined time has elapsed.

  On the other hand, a technique for detecting clogging of a filter based on a temperature difference between the room temperature and the temperature inside the hot air heater has also been known (see, for example, Patent Document 4).

Patent Document 4 includes a room temperature sensor for detecting the room temperature and a temperature sensor for clogging determination provided downstream of the combustion chamber or the combustion chamber of the air passage, and raises the room temperature to the reference set temperature in the initial state. Clogging when the temperature is raised to the set temperature during operation, rather than the temperature difference (Td ₀ -Tr ₀ ) between the reference judgment temperature Td ₀ of the temperature sensor for clogging judgment and the reference room temperature Tr ₀ of the room temperature sensor If the operating time of the temperature difference between the operating time of room temperature Tr _n operating time determining temperature Td _n and temperature sensor of the judgment temperature sensor (Td n _{-Tr n)} is higher than a predetermined temperature higher, temperature that notifies clogging of the air filter A wind heater is described.

JP-A-5-5564 JP 2005-207644 A Japanese Patent Laid-Open No. 9-21554 JP 2012-251752 A

  However, since the technology of Patent Document 1 evaluates the pressure of the refrigerant, when the pressure of the refrigerant is maintained at a constant value by controlling the frequency of the compressor or the rotational speed of the outdoor fan, There was a problem that a lack of refrigerant could not be detected.

  Moreover, although the technique of patent document 2 is evaluating not only the pressure and temperature of a refrigerant | coolant but the information of an apparatus drive means, the frequency of a compressor or the rotation speed of an outdoor fan is not evaluated. Therefore, even if the technique of Patent Document 2 is applied to the technique of Patent Document 1, the above problem cannot be solved.

  In addition to the leakage of the refrigerant, the same problem can occur not only with the contamination of the outdoor heat exchanger, the contamination of the indoor filter, and other abnormalities of the air conditioner.

  Furthermore, the technique of Patent Document 3 has a low detection accuracy because the determination is based only on the accumulated time of the rotation of the indoor fan without considering the air quality and the air volume that affect filter clogging. Therefore, filter clogging may not be detected until the air conditioning capacity is significantly reduced, or filter clogging that does not require cleaning may be detected.

  By the way, when the filter clogging of the indoor unit proceeds, the air that has exchanged heat with the air upstream side of the indoor heat exchanger enters the fan inlet through a short circuit. The air that enters through this short circuit is low-temperature air during cooling and high-temperature air during heating. Therefore, the temperature of the air at the fan inlet decreases in a short time during cooling, and increases in a short time during heating. However, since the technique of Patent Document 3 does not detect filter clogging by paying attention to the temperature change of the air at the fan inlet immediately after the start of the air conditioning operation, it can detect clogging of the filter of the indoor unit with high accuracy. could not.

  Moreover, the technique of patent document 4 detects clogging of a filter based on the temperature difference between the room temperature and the temperature inside the hot air heater, and based on the temperature change of the air at the same place immediately after the start of operation. It does not detect filter clogging. Therefore, even if the technique of Patent Document 4 is applied to an air conditioner, clogging of the filter of the indoor unit cannot be detected with high accuracy.

  Furthermore, the inventions of Patent Documents 1 to 4 provide means for energy saving in a system including an air conditioner and a ventilator, in which air-conditioning operation by the air conditioner and ventilating operation by the ventilator are performed simultaneously. I don't suggest anything.

  An object of the present invention is to detect an abnormality of an air conditioner even if the pressure of a refrigerant is maintained at a constant value by controlling the frequency of a compressor or the rotational speed of an outdoor fan.

  Another object of the present invention is to detect clogging of a filter of an indoor unit with high accuracy.

  Still another object of the present invention is to save energy when a system including an air conditioner and a ventilator performs a cooling / heating operation using the air conditioner and a ventilating operation using the ventilator at the same time.

  For this purpose, the present invention provides an operating state of the control device including the frequency of the compressor of the air conditioner or the rotational speed of the outdoor fan of the air conditioner when the air conditioner is performing a cooling operation or a heating operation. And an output unit that outputs information indicating that an abnormality has occurred in the air conditioner when the operation state information satisfies a predetermined condition. A detection device is provided.

  Here, the acquisition means acquires operating state information including the frequency of the compressor of the air conditioner, the rotational speed of the outdoor fan of the air conditioner, and the opening degree of the expansion valve of the air conditioner. Good. In that case, when the air conditioner is performing the cooling operation, the output means satisfies the condition that the operating state information is a predetermined condition and the frequency and the number of rotations are decreased and the opening degree is increased. In this case, when the air conditioner is performing a heating operation, if the operating state information satisfies the conditions that the frequency, the rotation speed, and the opening degree are increased as predetermined conditions, the air conditioner Information indicating that refrigerant leakage has occurred as an abnormality may be output. In addition, when the air conditioner is performing a cooling operation or a heating operation, the operating state information is a predetermined condition, and the condition that the frequency and the number of rotations increase and the opening degree decreases. When satisfy | filling, the information which shows that the dirt of the outdoor heat exchanger has generate | occur | produced as abnormality in an air conditioner may be output. Furthermore, whether the air conditioner is performing a cooling operation or a heating operation, the operation state information satisfies a condition that the frequency, the number of rotations, and the opening degree are reduced as predetermined conditions. In this case, information indicating that the indoor filter is contaminated as an abnormality in the air conditioner may be output.

  The present invention also includes an air conditioner that harmonizes air in an air-conditioning target space, and an abnormality detection device that detects an abnormality of the air conditioner, and the air conditioner includes a control device including a compressor and an outdoor fan; Transmitting means for transmitting operation state information indicating the operation state of the control device including the frequency of the compressor and the rotation speed of the outdoor fan when the own device is performing the cooling operation or the heating operation, the abnormality detection device, Receiving means for receiving the operating state information transmitted by the transmitting means, and output means for outputting information indicating that an abnormality has occurred in the air conditioner when the operating state information satisfies a predetermined condition; An air conditioning system equipped with

  Here, the air conditioning apparatus may be controlled by a first microcomputer, and the abnormality detection apparatus may be controlled by a second microcomputer having a memory capacity larger than that of the first microcomputer.

  Furthermore, the present invention provides an operating state indicating the operating state of the control device including the frequency of the compressor of the air conditioner or the rotational speed of the outdoor fan of the air conditioner when the air conditioner is performing a cooling operation or a heating operation. An abnormality detection method including a step of obtaining information and a step of outputting information indicating that an abnormality has occurred in the air conditioner when the operation state information satisfies a predetermined condition is also provided.

  Furthermore, the present invention provides an operation state of a control device including a frequency of a compressor of an air conditioner or a rotation speed of an outdoor fan of the air conditioner when the air conditioner is performing a cooling operation or a heating operation. A program for realizing a function of acquiring operating state information indicating the function and a function of outputting information indicating that an abnormality has occurred in the air conditioner when the operating state information satisfies a predetermined condition Also provide.

  Furthermore, the present invention includes an indoor unit installed indoors and an abnormality detection device that detects an abnormality of the indoor unit. The indoor unit includes a filter that removes dust in the air, and air and refrigerant that have passed through the filter. An anomaly detection device comprising: a heat exchanger that exchanges heat with the heat exchanger; and a measuring unit that measures the temperature of the air at a predetermined position in the direction in which the air exchanged by the heat exchanger flows due to the occurrence of a short circuit Are a first temperature which is a temperature measured by the measuring means at the start of the cooling operation or the heating operation, and a second temperature which is a temperature measured by the measuring means when a certain time has elapsed after the start of the cooling operation or the heating operation. And an output means for outputting information indicating that the filter is clogged when the amount of change from the first temperature to the second temperature satisfies a predetermined condition; With To provide a gas-conditioning apparatus.

  Here, the predetermined position may be a position upstream of the position where the air that has passed through the filter exists in the direction in which the air subjected to heat exchange by the heat exchanger flows due to the occurrence of a short circuit.

  Further, the indoor unit is formed in a bell mouth shape, and is installed in a suction port for sucking air that has passed through the filter from vertically downward to vertically upward, and in the horizontal direction for air sucked from the suction port. The heat exchanger is installed so as to sandwich the fan on a horizontal plane, the predetermined position is above the upper end of the suction port, and the heat exchanger and the air to the fan It may be a position between the entrance.

  Further, the present invention provides a temperature of air at a predetermined position in a direction in which the air exchanged by the heat exchanger of the indoor unit of the air conditioner flows due to the occurrence of a short circuit, and the cooling operation of the air conditioner Or the acquisition means which acquires the 1st temperature which is the temperature measured at the time of the start of heating operation, and the 2nd temperature which is the temperature measured at the time of fixed time progress after the start of the cooling operation or heating operation of an air conditioner And an output means for outputting information indicating that the filter of the indoor unit is clogged when the amount of change from the first temperature to the second temperature satisfies a predetermined condition. An anomaly detection device is also provided.

  Here, the output means is clogged when the amount of change from the first temperature to the second temperature satisfies a condition that a predetermined condition exceeds a predetermined threshold. It is possible to output information indicating that the user is present.

  Furthermore, the present invention provides the air temperature at a predetermined position in the direction in which the air exchanged by the heat exchanger of the indoor unit of the air conditioner flows due to the occurrence of a short circuit, and the cooling operation of the air conditioner Or acquiring a first temperature that is a temperature measured at the start of the heating operation and a second temperature that is a temperature measured when a certain time has elapsed after the start of the cooling operation or the heating operation of the air conditioner; Outputting an information indicating that the filter of the indoor unit is clogged when the amount of change from the first temperature to the second temperature satisfies a predetermined condition. Also provide.

  Furthermore, the present invention provides the computer with the temperature of the air at a predetermined position in the direction in which the air exchanged by the heat exchanger of the indoor unit of the air conditioner flows due to the occurrence of a short circuit, A first temperature, which is a temperature measured at the start of the cooling operation or heating operation of the air conditioner, and a second temperature, which is a temperature measured when a certain time has elapsed after the start of the cooling operation or heating operation of the air conditioner. A function to obtain, and a function to output information indicating that the filter of the indoor unit is clogged when a change amount from the first temperature to the second temperature satisfies a predetermined condition. A program to realize this is also provided.

  Furthermore, the present invention provides a first control means for performing a follow-up control of a set temperature when the air conditioner performs a cooling operation or a heating operation based on an index indicating the comfort of indoor air, and the first control means. Heat exchange in the ventilator when the ventilator performs ventilation operation based on the comparison result between the index indicating the comfort of the indoor air as a result of performing the follow-up control of the set temperature by the index and the index indicating the comfort of the outside air An air conditioning control device is provided that includes second control means for controlling the presence or absence of the air conditioner.

  Here, the second control means is configured so that the air conditioner operates in the cooling operation based on a comparison result between an index indicating the comfort of room air before the start of the cooling operation by the air conditioner and an index indicating the comfort of the outside air. It is possible to control the presence or absence of the ventilation operation by the ventilation device before starting the operation.

  The second control means includes an index indicating the comfort of room air when the ventilation device performs ventilation operation while exchanging heat, and the ventilation device when ventilation operation is performed without performing heat exchange. Based on a comparison result with an index indicating the comfort of room air, the presence or absence of heat exchange in the ventilation device when the ventilation device performs a ventilation operation may be controlled.

  Further, the air conditioning control device includes an initial indoor relative humidity estimation means for estimating an initial indoor relative humidity that is an indoor relative humidity in an initial state, and a dehumidification that is an amount of water vapor that is dehumidified indoors by cooling from the initial state to the present time. Dehumidifying water vapor amount estimating means for estimating water vapor amount, ventilating water vapor amount estimating means for estimating the amount of water vapor flowing into and out of the room by ventilation from the initial state to the present time, initial indoor relative humidity, and dehumidified water vapor The current indoor relative humidity estimation means that estimates the current indoor relative humidity, which is the current relative humidity, based on the amount of ventilation and the amount of ventilation water vapor, and an index that indicates the comfort of indoor air based on the current indoor relative humidity And a comfort index calculating means.

  In addition, the air conditioning control device includes a relationship storage unit that stores a weather / room temperature-clothing amount relationship, which is a relationship between weather or room temperature, and a clothing amount, for each of a plurality of temperature categories, and an air temperature acquisition that obtains the air temperature. Based on the temperature acquired by the means and the temperature acquisition means, the weather / room temperature-clothing amount relationship of the corresponding temperature category is acquired from among the plurality of weather / room temperature-clothing amount relationships stored in the relationship storage means. Relationship acquisition means, weather / room temperature acquisition means for acquiring weather or room temperature, weather / room temperature-clothing amount relationship acquired in the relationship acquisition means, and clothing based on the weather or room temperature acquired in the weather / room temperature acquisition means A clothing amount estimating means for estimating the amount, and a comfort index calculating means for calculating an index indicating the comfort of room air based on the clothing amount estimated by the clothing amount estimating means. It may be.

  Further, the air conditioning control device includes a temperature acquisition unit that acquires a minimum temperature forecast value and a maximum temperature forecast value from weather forecast data, and a representative temperature based on the minimum temperature forecast value and the maximum temperature forecast value acquired by the temperature acquisition unit. Based on the representative temperature calculating means for calculating the weather, the weather / room temperature acquiring means for acquiring the weather or room temperature, the representative temperature calculated by the representative temperature calculating means, and the weather or room temperature acquired by the weather / room temperature acquiring means , Further comprising: a clothing amount estimating means for estimating a clothing amount; and a comfort index calculating means for calculating an index indicating the comfort of indoor air based on the clothing amount estimated by the clothing amount estimating means. There may be.

  Furthermore, the air-conditioning control apparatus determines the reference value according to a predetermined procedure, and if the user existing in the air-conditioning target space has not changed the temperature setting of the air-conditioning target space, the reference value is set to the average radiation temperature. And when the user changes the temperature setting, an average radiation temperature estimation means for estimating a value obtained by correcting the reference value based on the temperature set by the user as an average radiation temperature, and an average radiation temperature estimation means, The apparatus may further include a comfort index calculating unit that calculates an index indicating the comfort of room air based on the estimated average radiation temperature.

  Further, the present invention provides a step for performing tracking control of the set temperature when the air conditioner performs cooling operation or heating operation based on an index indicating the comfort of room air, and a result of performing the tracking control of the set temperature. Air conditioning including a step of controlling the presence or absence of heat exchange in the ventilator when the ventilator performs a ventilating operation based on a comparison result between an index indicating the comfort of indoor air and an index indicating the comfort of outside air A control method is also provided.

  Furthermore, the present invention provides a computer with a function for performing tracking control of a set temperature when the air conditioner performs cooling operation or heating operation based on an index indicating comfort of indoor air, and tracking control of the set temperature. A function for controlling the presence or absence of heat exchange in the ventilator when the ventilator performs a ventilating operation based on the comparison result of the index indicating the comfort of the indoor air and the index indicating the comfort of the outside air We also provide a program to achieve this.

  ADVANTAGE OF THE INVENTION According to this invention, even if the pressure of a refrigerant | coolant is maintained by the constant value by controlling the frequency of a compressor or the rotation speed of an outdoor fan, it becomes possible to detect abnormality of an air conditioner.

  According to the present invention, it is possible to detect the clogging of the filter of the indoor unit with high accuracy.

  ADVANTAGE OF THE INVENTION According to this invention, in the system provided with the air conditioner and the ventilator, it becomes possible to aim at energy saving when performing the air conditioning operation by the air conditioner and the ventilation operation by the ventilator simultaneously.

It is a schematic block diagram of the air conditioning system in the 1st Embodiment of this invention. It is a schematic block diagram of the set which consists of the outdoor unit and indoor unit in the 1st Embodiment of this invention. It is the figure which showed the function structural example of the centralized controller in the 1st Example of the 1st Embodiment of this invention. It is the flowchart which showed the operation example at the time of the cooling operation of the centralized controller in the 1st Example of the 1st Embodiment of this invention. It is the flowchart which showed the operation example at the time of the heating operation of the centralized controller in the 1st Example of the 1st Embodiment of this invention. It is a schematic block diagram of the indoor unit in the 2nd Example of the 1st Embodiment of this invention. It is the graph which showed the temperature change of the inlet air within the fixed time after the cooling operation start. It is the figure which showed the 1st example of installation with respect to the indoor unit of an inlet air temperature sensor. It is the figure which showed the 2nd example of installation with respect to the indoor unit of an inlet air temperature sensor. It is the graph which showed the difference by the installation position of the inlet air temperature sensor of the temperature change of inlet air with respect to the clogging rate of the filter at the time of heating operation. It is the figure which showed the function structural example of the control apparatus of the outdoor unit in 2nd Example of the 1st Embodiment of this invention. It is the flowchart which showed the operation example of the control apparatus of the outdoor unit in 2nd Example of the 1st Embodiment of this invention. It is a block diagram which shows the structure of the air conditioning system which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structure of the ventilation apparatus of the 2nd Embodiment of this invention. It is a flowchart which shows the control procedure in the ventilation operation and preliminary operation of the 2nd Embodiment of this invention. It is a flowchart which shows the control procedure in the ventilation operation and preliminary operation of the modification of the 2nd Embodiment of this invention. It is a figure which shows the structure of the modification of the ventilation apparatus in the 2nd Embodiment of this invention. It is a schematic block diagram which shows the non-heat exchange state of the air conditioner in the 3rd Embodiment of this invention. It is a schematic block diagram which shows the heat exchange state of the air conditioner in the 3rd Embodiment of this invention. It is a functional block diagram which shows the function of the control part in the 3rd Embodiment of this invention. It is a flowchart which shows operation | movement of the air conditioner in the 3rd Embodiment of this invention. It is a graph which shows the effect of the air conditioner in the 3rd Embodiment of this invention. It is a schematic block diagram of the air conditioner in the modification of the 3rd Embodiment of this invention. It is a flowchart which shows operation | movement of the air conditioner in the modification of the 3rd Embodiment of this invention. It is a block diagram which shows the structure of the air conditioning system which concerns on the 4th Embodiment of this invention. It is a flowchart which shows the control procedure of the air conditioner and ventilation apparatus at the time of the air_conditionaing | cooling operation of the 4th Embodiment of this invention. It is a flowchart which shows the control procedure of the air conditioner and ventilation apparatus at the time of the heating operation of the 4th Embodiment of this invention. It is a schematic diagram which shows the air conditioning system and humidity estimation apparatus which concern on the 5th Embodiment of this invention. It is a schematic diagram which shows the calculation process of the latent heat ratio in the 5th Embodiment of this invention. It is a functional block diagram of the air conditioning system which concerns on the 1st Example of the 6th Embodiment of this invention. It is a schematic diagram shown about the representative temperature which the representative temperature calculation part in the 1st Example of the 6th Embodiment of this invention calculates. It is a schematic diagram which shows the weather / room temperature-clothing amount relationship memorize | stored in the relationship memory | storage part in the 1st Example of the 6th Embodiment of this invention. It is a flowchart which shows operation | movement of the air conditioning system of the 1st Example of the 6th Embodiment of this invention. It is the graph which compared the air conditioning system of the 1st Example of the 6th Embodiment of this invention, and the clothing amount estimation precision of a prior art. It is the graph which compared the air conditioning system of the 1st Example of the 6th Embodiment of this invention, and the target room temperature set by a prior art. It is the graph which compared the air conditioning system of the 1st Example of the 6th Embodiment of this invention, and the energy saving effect of a prior art. It is the graph which compared the air conditioning apparatus of the 1st Example of the 6th Embodiment of this invention, and the target room temperature set by a prior art. It is the graph which compared the air conditioning apparatus of the 1st Example of the 6th Embodiment of this invention, and the energy saving effect of a prior art. It is a schematic diagram shown about the representative temperature which the representative temperature calculation part in the 2nd Example of the 6th Embodiment of this invention calculates. It is a schematic diagram which shows the weather / room temperature-clothing amount relationship memorize | stored in the relationship memory | storage part in the 2nd Example of the 6th Embodiment of this invention. It is a flowchart which shows operation | movement of the air conditioning apparatus in the 2nd Example of the 6th Embodiment of this invention. It is a schematic diagram which shows the weather / room temperature-clothing amount relationship memorize | stored in the relationship memory | storage part in the other Example of the 6th Embodiment of this invention. It is a block diagram which shows the function of the air conditioning system which concerns on the 7th Embodiment of this invention. It is a flowchart which shows the procedure of the clothing amount estimation process which a clothing amount estimation part performs. It is a flowchart which shows the procedure of the average radiation temperature estimation process which an average radiation temperature estimation part performs.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. First, when energy saving is achieved with an air conditioner, an embodiment for preventing the energy saving from being wasted due to a failure of the air conditioner or the like will be described as a first embodiment. Next, embodiments for saving energy in the air conditioner by operation control of the air conditioner will be described as second to fourth embodiments. Subsequently, a fifth embodiment for estimating parameters used for calculating PMV (Predicted Mean Vote), which is an example of an index indicating the comfort of indoor air used in the second to fourth embodiments, will be described. This will be described as the seventh to seventh embodiments.

<First Embodiment>
[Configuration of air conditioning system]
FIG. 1 is a schematic configuration diagram of an air conditioning system 1 according to the present embodiment. As illustrated, the air conditioning system 1 includes a plurality of air conditioners 10 and a centralized controller 20 that controls the plurality of air conditioners 10. As the air conditioning system 1, a packaged air conditioner type air conditioner for buildings such as buildings can be exemplified.

  The air conditioner 10 is an example of an air conditioner. For example, the outdoor unit 30 installed on the roof of a building, the plurality of indoor units 40 installed in each part of the building, the settings of the indoor unit 40, and the like. A remote controller 50 is provided, and a pipe 60 connected to the outdoor unit 30 and the indoor unit 40 and through which refrigerant circulating to the outdoor unit 30 and the indoor unit 40 flows is provided. In FIG. 1, four indoor units 40 are installed inside the ceiling of the first room 101 in the building 100, and four indoor units 40 are installed inside the ceiling of the second room 102 in the building 100. The installed configuration is shown. In the configuration shown in FIG. 1, the four indoor units 40 attached to the first room 101 and the four indoor units 40 attached to the second room 102 are respectively connected via pipes 60. It is connected to one outdoor unit 30. The numbers of the outdoor units 30 and the indoor units 40 shown in FIG. 1 are examples, and the number of indoor units 40 connected to each outdoor unit 30 may be different. The indoor unit 40 may be hung on the wall of the room.

[Configuration of air conditioner]
FIG. 2 is a schematic configuration diagram of a set including one outdoor unit 30 and two indoor units 40 extracted from the air conditioner 10 illustrated in FIG. 1.

  The outdoor unit 30 includes a compressor 31 that compresses the refrigerant, a four-way switching valve 32 that switches the flow path of the refrigerant, an outdoor heat exchanger 33 that is a device that transfers heat from a high-temperature object to a low-temperature object, An outdoor expansion valve 34 that expands and vaporizes the refrigerant liquid to make it low pressure and low temperature, and an accumulator 35 that separates the refrigerant liquid that has not completely evaporated are provided. The outdoor unit 30 includes an outdoor blower 36 that applies air to the outdoor heat exchanger 33 to promote heat exchange between the refrigerant and the air. The four-way switching valve 32 is connected to the compressor 31, the outdoor heat exchanger 33, and the accumulator 35 by piping. Moreover, the compressor 31 and the accumulator 35 are connected by piping, and the outdoor heat exchanger 33 and the outdoor expansion valve 34 are connected by piping. In addition, in FIG. 2, the state in the case of performing heating operation is shown as a switching connection state of the four-way switching valve 32.

  The outdoor unit 30 includes a control device 37 that controls the operation of the compressor 31, the outdoor expansion valve 34, the outdoor blower 36, and the like, the switching of the four-way switching valve 32, and the like. Here, the control device 37 is realized by a microcomputer.

  The indoor unit 40 promotes heat exchange between the refrigerant and air by applying air to the indoor heat exchanger 41 and the indoor heat exchanger 41 that are devices that move heat from a high-temperature object to a low-temperature object. An indoor blower 42 and an indoor expansion valve 43 that expands and vaporizes the condensed refrigerant liquid to make it low pressure and low temperature are provided.

  The pipe 60 has a liquid refrigerant pipe 61 through which liquefied refrigerant flows and a gas refrigerant pipe 62 through which gas refrigerant flows. The liquid refrigerant pipe 61 is arranged so that the refrigerant flows between the indoor expansion valve 43 of the indoor unit 40 and the outdoor expansion valve 34 of the outdoor unit 30. The gas refrigerant pipe 62 is arranged so that the refrigerant passes between the four-way switching valve 32 of the outdoor unit 30 and the gas side of the indoor heat exchanger 41 of the indoor unit 40.

[First embodiment]
(Overview)
In the present embodiment, such an abnormality of the air conditioner 10 is detected and displayed.

  That is, in the present embodiment, first, the centralized controller 20 acquires information on the pressure and temperature of the refrigerant during the air conditioning operation and the operation of the control device as measurement parameters. Here, examples of the pressure include low pressure part pressures such as suction pressure and evaporator pressure, and high pressure part pressures such as discharge pressure, condenser pressure, and liquid pipe pressure. In addition, the temperature includes low-pressure gas part temperature such as suction temperature and evaporator outlet temperature, high-pressure gas part temperature such as discharge temperature and condenser inlet temperature, liquid part temperature such as liquid pipe temperature and condenser outlet temperature, or The degree of supercooling is exemplified. Furthermore, as information regarding the operation of the control device, the frequency of the compressor 31, the rotational speed of the fan of the outdoor blower 36, and the opening degree of the outdoor expansion valve 34 are exemplified. Hereinafter, the frequency of the compressor 31 is referred to as “compressor frequency”, and the rotational speed of the fan of the outdoor blower 36 is referred to as “outdoor fan rotational speed”. In addition, as for the opening degree of the outdoor expansion valve 34, the opening degree of the indoor expansion valve 43 may be used instead, and is simply referred to as “expansion valve opening degree”.

  Next, the centralized controller 20 analyzes these measurement parameters and detects an abnormality of the air conditioner 10. In the following, as an abnormality of the air conditioner 10, refrigerant leak, dirt on the outdoor heat exchanger 33 (hereinafter referred to as “outdoor heat exchanger dirt”), and in the inhaled air installed in the indoor unit 40 An example of filter contamination for removing dust (hereinafter referred to as “indoor filter contamination”) will be described.

  Table 1 is a table showing an example of a method for analyzing measurement parameters during cooling operation.

  First, a method for analyzing measurement parameters for detecting refrigerant leak during cooling operation will be described.

  Table 1 shows that the refrigerant leak can be detected when the low-pressure part pressure and the high-pressure part pressure are decreased, the low-pressure gas part temperature and the high-pressure gas part temperature are increased, and the liquid part temperature is decreased. Yes.

  Thus, when the low-pressure part pressure decreases during the cooling operation, the compressor 31 may increase the low-pressure part pressure by decreasing the compressor frequency. Therefore, Table 1 shows that the refrigerant leak can be detected when the compressor frequency is decreasing.

  Further, when the high-pressure section pressure decreases during the cooling operation, the outdoor blower 36 may increase the high-pressure section pressure by decreasing the outdoor fan rotation speed. Therefore, Table 1 shows that the refrigerant leak can be detected when the outdoor fan speed is decreasing.

  Furthermore, when the low-pressure gas part temperature rises during the cooling operation, the outdoor expansion valve 34 may decrease the low-pressure gas part temperature by increasing the expansion valve opening degree. Therefore, Table 1 shows that the refrigerant leak can be detected when the opening degree of the expansion valve is increased.

  Next, a method for analyzing measurement parameters for detecting outdoor heat exchanger contamination during cooling operation will be described.

  Table 1 shows that the outdoor heat exchanger contamination can be detected when the low-pressure part pressure and the high-pressure part pressure rise and the high-pressure gas part temperature and liquid part temperature also rise. In the cooling operation, the low-pressure gas part temperature is the temperature of the gas refrigerant on the outlet side of the indoor unit 40, and is not related to the outdoor heat exchanger contamination, and therefore is not analyzed here.

  Thus, when the low-pressure part pressure rises during the cooling operation, the compressor 31 may reduce the low-pressure part pressure by increasing the compressor frequency. Accordingly, Table 1 shows that outdoor heat exchanger contamination can be detected when the compressor frequency is increased.

  Further, when the high-pressure section pressure increases during the cooling operation, the outdoor fan 36 may decrease the high-pressure section pressure by increasing the outdoor fan rotation speed. Therefore, Table 1 shows that the outdoor heat exchanger contamination can be detected when the outdoor fan rotation speed is increased.

  Furthermore, during the cooling operation, the outdoor expansion valve 34 can control the low-pressure gas part temperature by changing the expansion valve opening degree. However, since the low-pressure gas part temperature is not an object of analysis, the outdoor heat exchanger contamination cannot be detected by increasing or decreasing the expansion valve opening. On the other hand, when the outdoor heat exchanger is contaminated, the liquid refrigerant may be controlled not to flow into the indoor unit 40 by reducing the expansion valve opening degree. Therefore, Table 1 shows that the outdoor heat exchanger contamination can be detected when the expansion valve opening is decreasing.

  Next, a method for analyzing measurement parameters for detecting indoor filter contamination during cooling operation will be described.

  Table 1 shows that the indoor filter contamination can be detected when the low-pressure part pressure and the high-pressure part pressure are lowered and the low-pressure gas part temperature and the high-pressure gas part temperature are also lowered. In the cooling operation, the liquid part temperature is the temperature of the liquid refrigerant on the outlet side of the outdoor unit 30 and is not related to the indoor filter contamination, and thus is not an analysis target here.

  Thus, when the low-pressure part pressure decreases during the cooling operation, the compressor 31 may increase the low-pressure part pressure by decreasing the compressor frequency. Therefore, Table 1 shows that indoor filter contamination can be detected when the compressor frequency is decreasing.

  Further, when the high-pressure section pressure decreases during the cooling operation, the outdoor blower 36 may increase the high-pressure section pressure by decreasing the outdoor fan rotation speed. Therefore, Table 1 shows that the indoor filter contamination can be detected when the outdoor fan speed is decreasing.

  Furthermore, when the low-pressure gas part temperature decreases during the cooling operation, the outdoor expansion valve 34 may increase the low-pressure gas part temperature by decreasing the expansion valve opening degree. Accordingly, Table 1 shows that the indoor filter contamination can be detected when the expansion valve opening is decreasing.

  Table 2 is a table showing an example of a method for analyzing measurement parameters during heating operation.

  First, a method for analyzing measurement parameters for detecting refrigerant leakage during heating operation will be described.

  Table 2 shows that the refrigerant leak can be detected when the low-pressure part pressure and the high-pressure part pressure are decreased, the low-pressure gas part temperature and the high-pressure gas part temperature are increased, and the liquid part temperature is decreased. Yes.

  As described above, when the high-pressure section pressure decreases during the heating operation, the compressor 31 may increase the high-pressure section pressure by increasing the compressor frequency. Therefore, Table 2 shows that refrigerant leakage can be detected when the compressor frequency is increasing.

  In addition, when the low-pressure part pressure decreases during the heating operation, the outdoor fan 36 may increase the low-pressure part pressure by increasing the outdoor fan rotation speed. Therefore, Table 2 shows that the refrigerant leak can be detected when the outdoor fan rotation speed is increased.

  Further, when the liquid temperature decreases during the heating operation, the outdoor expansion valve 34 may increase the liquid temperature by increasing the expansion valve opening degree. Therefore, Table 2 shows that the refrigerant leak can be detected when the expansion valve opening degree is increased.

  Next, a method for analyzing measurement parameters for detecting outdoor heat exchanger contamination during heating operation will be described.

  Table 2 shows that the outdoor heat exchanger contamination can be detected when the low-pressure part pressure and the high-pressure part pressure are lowered and the high-pressure gas part temperature and the low-pressure gas part temperature are also lowered. In the heating operation, the liquid part temperature is the temperature of the liquid refrigerant on the outlet side of the indoor unit 40 and is not related to the outdoor heat exchanger contamination, and thus is not an analysis target here.

  As described above, when the high-pressure section pressure decreases during the heating operation, the compressor 31 may increase the high-pressure section pressure by increasing the compressor frequency. Therefore, Table 2 shows that outdoor heat exchanger contamination can be detected when the compressor frequency is increased.

  In addition, when the low-pressure part pressure decreases during the heating operation, the outdoor fan 36 may increase the low-pressure part pressure by increasing the outdoor fan rotation speed. Therefore, Table 2 shows that the outdoor heat exchanger contamination can be detected when the outdoor fan rotation speed is increased.

  Furthermore, during the heating operation, the outdoor expansion valve 34 can control the liquid temperature by changing the opening degree of the expansion valve. However, since the liquid part temperature is not an analysis target, it is impossible to detect outdoor heat exchanger contamination by increasing or decreasing the expansion valve opening. On the other hand, when the outdoor heat exchanger is contaminated, the liquid refrigerant may be controlled not to flow into the outdoor unit 30 by decreasing the expansion valve opening degree. Therefore, Table 2 shows that the outdoor heat exchanger contamination can be detected when the expansion valve opening is decreasing.

  Next, a method for analyzing measurement parameters for detecting indoor filter contamination during heating operation will be described.

  Table 2 shows that indoor filter contamination can be detected when the low-pressure part pressure and the high-pressure part pressure rise and the high-pressure gas part temperature and liquid part temperature also rise. In the heating operation, the low-pressure gas part temperature is the temperature of the gas refrigerant on the outlet side of the outdoor unit 30 and is not related to the indoor filter contamination, and is not an analysis target here.

  Thus, when the high pressure part pressure rises during heating operation, the compressor 31 may reduce the high pressure part pressure by reducing the compressor frequency. Therefore, Table 2 shows that indoor filter contamination can be detected when the compressor frequency is decreasing.

  Moreover, when the low-pressure part pressure rises during the heating operation, the outdoor fan 36 may reduce the low-pressure part pressure by reducing the outdoor fan rotation speed. Therefore, Table 2 shows that indoor filter contamination can be detected when the outdoor fan rotation speed is decreasing.

  Further, when the liquid temperature rises during the heating operation, the outdoor expansion valve 34 may decrease the low pressure gas temperature by reducing the expansion valve opening. Therefore, Table 2 shows that indoor filter contamination can be detected when the expansion valve opening is decreasing.

  Thereafter, the centralized controller 20 displays the detection results of the refrigerant leak, the outdoor heat exchanger contamination, and the indoor filter contamination on a device that can be confirmed by a user, an administrator, a service person, etc. of the air conditioner 10.

(Centralized controller)
FIG. 3 is a diagram illustrating a functional configuration example of the centralized controller 20 that performs such an operation. The centralized controller 20 is an example of an abnormality detection device, and is operated by a microcomputer having a larger memory capacity than the microcomputer of the control device 37 of the outdoor unit 30. And the centralized controller 20 is provided with the measurement parameter receiving part 21, the abnormality determination part 22, and the determination result output part 23 so that it may show in figure.

  The measurement parameter receiving unit 21 receives, from the control device 37 of the outdoor unit 30, measurement parameters including information on the pressure and temperature of the refrigerant during the air conditioning operation and the operation of the control device. In the outdoor unit 30, the control device 37 outputs a command to increase or decrease the compressor frequency to the compressor 31, outputs a command to increase or decrease the outdoor fan rotation speed to the outdoor blower 36, and issues a command to increase or decrease the expansion valve opening. It outputs to the outdoor expansion valve 34. Therefore, in particular, these commands may be received from the control device 37 as information regarding the operation of the control device. As described above, the opening degree of the indoor expansion valve 43 may be used as the opening degree of the expansion valve. In this case, the opening degree of the indoor unit 40 is controlled directly from a control unit (not shown) of the indoor unit 40 or the control unit 37 of the outdoor unit 30. It is only necessary to receive a command via. In this embodiment, each command is used as an example of operation state information indicating the operation state of the control device. In addition, a measurement parameter receiving unit 21 is provided as an example of an acquisition unit that acquires operation state information. Furthermore, since the control device 37 of the outdoor unit 30 transmits each command to the measurement parameter reception unit 21, it is an example of a transmission unit that transmits operation state information. In this case, the measurement parameter reception unit 21 It is an example of the receiving means which receives status information.

  The abnormality determination unit 22 checks whether the measurement parameter received by the measurement parameter reception unit 21 matches a predetermined increase / decrease pattern of the compressor frequency, the outdoor fan rotation speed, and the expansion valve opening, thereby adjusting the air conditioning. It is determined whether refrigerant leak, outdoor heat exchanger contamination, or indoor filter contamination has occurred in the machine 10.

  When the abnormality determination unit 22 determines that the refrigerant leak, the outdoor heat exchanger contamination, or the indoor filter contamination has occurred in the air conditioner 10, the determination result output unit 23 outputs that effect. In the present embodiment, the determination result output unit 23 is provided as an example of an output unit that outputs information indicating that an abnormality has occurred in the air conditioner.

  Next, the operation of the centralized controller 20 having such a configuration will be described. In the above, the low-pressure part pressure and the high-pressure part pressure, the low-pressure gas part temperature and the high-pressure gas part temperature, and the liquid part temperature are also exemplified as the measurement parameters. Only the number and the expansion valve opening will be described as an example. Moreover, the conditions regarding the compressor frequency, the outdoor fan rotation speed, and the expansion valve opening degree shown in Tables 1 and 2 are merely examples, and can be generalized as predetermined conditions. The description will be made on the assumption of the conditions shown in FIG.

  FIG. 4 is a flowchart illustrating an operation example of the centralized controller 20 during the cooling operation.

  When the operation starts, in the centralized controller 20, first, the measurement parameter receiving unit 21 receives measurement parameters including the compressor frequency, the outdoor fan rotation speed, and the expansion valve opening degree from the control device 37 (step 201). In the outdoor unit 30, the control device 37 outputs a command to increase or decrease the compressor frequency to the compressor 31, outputs a command to increase or decrease the outdoor fan rotation speed to the outdoor blower 36, and issues a command to increase or decrease the expansion valve opening. Since these are output to the outdoor expansion valve 34, these commands may be received as measurement parameters.

  Accordingly, whether or not the abnormality determination unit 22 matches the increase / decrease in the compressor frequency, the increase / decrease in the outdoor fan rotation speed, and the increase / decrease in the expansion valve opening included in the measurement parameter match the increase / decrease pattern shown in Table 1. Is checked to determine whether refrigerant leak, outdoor heat exchanger contamination, or indoor filter contamination has occurred in the air conditioner 10.

  That is, the abnormality determination unit 22 first determines whether the compressor frequency is increasing or decreasing (step 202).

  As a result, when it is determined that the compressor frequency is decreasing, the abnormality determination unit 22 determines whether the outdoor fan rotation speed is increasing or decreasing (step 203). And if it determines with the outdoor fan rotation speed increasing, since it does not correspond to the increase / decrease pattern shown in Table 1, the abnormality determination part 22 complete | finishes a process. If it is determined that the outdoor fan speed is decreasing, the abnormality determination unit 22 determines whether the expansion valve opening is increasing or decreasing (step 204). As a result, if it is determined that the expansion valve opening is increasing, the abnormality determination unit 22 determines that a refrigerant leak has occurred (step 205). On the other hand, if it is determined that the expansion valve opening is decreasing, the abnormality determination unit 22 determines that indoor filter contamination has occurred (step 206).

  On the other hand, also when it determines with the compressor frequency reducing, the abnormality determination part 22 determines whether the outdoor fan rotation speed is increasing or decreasing (step 207). And if it determines with the outdoor fan rotation speed reducing, since it does not correspond to the increase / decrease pattern shown in Table 1, the abnormality determination part 22 complete | finishes a process. If it is determined that the outdoor fan rotation speed is increasing, the abnormality determination unit 22 determines whether the expansion valve opening is increasing or decreasing (step 208). As a result, if it is determined that the expansion valve opening degree is increasing, the abnormality determination unit 22 ends the process because it does not apply to the increase / decrease pattern shown in Table 1. On the other hand, if it is determined that the expansion valve opening is decreasing, the abnormality determination unit 22 determines that the outdoor heat exchanger contamination has occurred (step 209).

  As described above, when it is determined that any one of the refrigerant leak, the outdoor heat exchanger contamination, and the indoor filter contamination has occurred, the determination result by the abnormality determination unit 22 is transmitted to the determination result output unit 23, and the determination result output unit 23 outputs the determination result (step 210). At this time, for example, the determination result may be output on the display screen of the centralized controller 20, or may be output to another device connected to the centralized controller 20 by wire or wirelessly.

  FIG. 5 is a flowchart showing an operation example of the centralized controller 20 during the heating operation.

  When the operation starts, in the centralized controller 20, first, the measurement parameter receiving unit 21 receives measurement parameters including the compressor frequency, the outdoor fan rotation speed, and the expansion valve opening degree from the control device 37 (step 251). In the outdoor unit 30, the control device 37 outputs a command to increase or decrease the compressor frequency to the compressor 31, outputs a command to increase or decrease the outdoor fan rotation speed to the outdoor blower 36, and issues a command to increase or decrease the expansion valve opening. Since these are output to the outdoor expansion valve 34, these commands may be received as measurement parameters.

  As a result, whether or not the abnormality determination unit 22 matches the increase / decrease in the compressor frequency, the increase / decrease in the outdoor fan rotation speed, and the increase / decrease in the expansion valve opening included in the measurement parameter match the increase / decrease pattern shown in Table 2. Is checked to determine whether refrigerant leak, outdoor heat exchanger contamination, or indoor filter contamination has occurred in the air conditioner 10.

  That is, the abnormality determination unit 22 first determines whether the compressor frequency is increasing or decreasing (step 252).

  As a result, when it is determined that the compressor frequency is increasing, the abnormality determination unit 22 determines whether the outdoor fan rotation speed is increasing or decreasing (step 253). And if it determines with the outdoor fan rotation speed reducing, since it does not correspond to the increase / decrease pattern shown in Table 2, the abnormality determination part 22 complete | finishes a process. If it is determined that the outdoor fan speed is increasing, the abnormality determination unit 22 determines whether the expansion valve opening is increasing or decreasing (step 254). As a result, if it is determined that the expansion valve opening is increasing, the abnormality determination unit 22 determines that a refrigerant leak has occurred (step 255). On the other hand, if it is determined that the expansion valve opening is decreasing, the abnormality determination unit 22 determines that the outdoor heat exchanger contamination has occurred (step 256).

  On the other hand, also when it determines with the compressor frequency reducing, the abnormality determination part 22 determines whether the outdoor fan rotation speed is increasing or decreasing (step 257). And if it determines with the outdoor fan rotation speed increasing, since it will not apply to the increase / decrease pattern shown in Table 2, the abnormality determination part 22 complete | finishes a process. If it is determined that the outdoor fan rotation speed is decreasing, the abnormality determination unit 22 determines whether the expansion valve opening is increasing or decreasing (step 258). As a result, if it is determined that the opening degree of the expansion valve is increasing, the abnormality determination unit 22 ends the process because it does not apply to the increase / decrease pattern shown in Table 2. On the other hand, if it is determined that the expansion valve opening is decreasing, the abnormality determination unit 22 determines that indoor filter contamination has occurred (step 259).

  As described above, when it is determined that any one of the refrigerant leak, the outdoor heat exchanger contamination, and the indoor filter contamination has occurred, the determination result by the abnormality determination unit 22 is transmitted to the determination result output unit 23, and the determination result output unit 23 outputs the determination result (step 260). At this time, for example, the determination result may be output on the display screen of the centralized controller 20, or may be output to another device connected to the centralized controller 20 by wire or wirelessly.

(effect)
In this embodiment, the compressor frequency and the outdoor fan rotation speed are evaluated. As a result, even if the discharge pressure and the suction pressure are maintained at a constant value by increasing / decreasing the compressor frequency and the outdoor fan rotation speed, a change in the air conditioning cycle can be detected by the compressor frequency and the outdoor fan rotation speed. became.

  In this embodiment, not only refrigerant leakage but also outdoor heat exchanger contamination can be detected, and indoor filter contamination can be detected with high accuracy.

  Furthermore, in this embodiment, the abnormality is detected by the centralized controller 20 having a microcomputer having a larger memory capacity than the microcomputer of the air conditioner 10. Thereby, complicated analysis such as statistical processing can be performed, and abnormality of the air conditioner 10 can be detected with high accuracy.

  From the above, it has become possible to predict the decline in performance before the decline in air conditioning performance becomes serious.

[Second Embodiment]
(Overview)
FIG. 6 is a schematic configuration diagram of the indoor unit 40 shown in FIGS. 1 and 2. Here, as the indoor unit 40, a ceiling-embedded type is illustrated.

  The indoor unit 40 is buried inside the ceiling 11 from the opening 12 of the ceiling 11 and covers the box-shaped main body 400 whose lower surface is opened, the lower surface opening 401 of the main body 400 and the opening 12 of the ceiling 11. And a ceiling panel 402 attached to the lower end of the main body 400.

  An indoor fan 42 for blowing indoor air is installed in the center of the main body 400, and an indoor heat exchanger 41 that cools and heats the air is installed around the indoor fan 42. The ceiling panel 402 is formed with a bell mouth-shaped suction port 44 at the center, and discharge ports 45 are formed in four directions around the suction port 44. In addition, on the suction port 44 side, a suction grill 46 having a large number of through holes and a filter 47 for removing dust in the air sucked from the suction port 44 are installed.

  The indoor blower 42 is a centrifugal turbo fan 421 as an example of a fan that sucks air from the lower suction port 44 side and discharges it in the radial direction, and a rear upper surface of the main body 400 so as to drive the turbo fan 421. Drive motor 422 to be fixed. The indoor heat exchanger 41 is installed in four directions around the turbo fan 421 so that the air sent out by the operation of the turbo fan 421 exchanges heat while passing. In addition, the indoor heat exchanger 41 is supported by a support member 48 installed at the lower inner side of the main body 400 so as to collect and discharge the condensed water flowing from the indoor heat exchanger 41. Thereby, when the indoor blower 42 inside the main body 400 operates, the air sucked into the main body 400 from the suction port 44 is heat-exchanged while passing through the indoor heat exchanger 41, as indicated by solid arrows. After that, the air is again supplied to the indoor space through the discharge port 45, and the indoor space is cooled or heated.

  However, in such an indoor unit 40, when the filter 47 is clogged, it becomes difficult for air to be sucked from the suction port 44, so that the air that has not passed through the indoor heat exchanger 41 is shown as indicated by the dashed arrow. The air enters the turbo fan 421 through a short circuit. The air entering through the short circuit exchanges heat with the air upstream side of the indoor heat exchanger 41, so that it is low temperature air during cooling and high temperature air during heating. Accordingly, in this case, the temperature of the air at the air inlet of the turbo fan 421 (hereinafter referred to as “inlet air”) decreases in a short time during cooling and increases in a short time during heating.

  FIG. 7 is a graph showing a change in the temperature of the inlet air within a fixed time after the start of the cooling operation. This graph shows the temperature change when the room temperature is 24 ° C. Immediately after the start of the cooling operation, the inlet air temperature is 23 to 24 ° C. even if the filter 47 may not be clogged. However, as time elapses, the inlet air temperature gradually decreases when the filter 47 is not clogged, whereas it rapidly decreases when the filter 47 is clogged. Although the temperature change of the inlet air within a certain time after the start of the heating operation is not shown, similarly, when the filter 47 is not clogged, it gradually rises, but when the filter 47 is clogged, it rises rapidly. It will be a thing.

  Therefore, in this embodiment, the progress of clogging of the filter 47 is detected by evaluating the temperature change of the inlet air in a certain time (about 5 to 10 minutes) after the start of the air conditioning operation.

  FIG. 8 is a diagram illustrating a first installation example of the inlet air temperature sensor 410 that detects a change in the temperature of the inlet air with respect to the indoor unit 40. In the first installation example, the inlet air temperature sensor 410 is installed on a line connecting the filter 47 and the air inlet of the turbofan 421.

  However, if the inlet air temperature sensor 410 is installed at such a position, the temperature of the air mixed with the air that has entered from the filter 47 and the air that has been shortcutted is detected. Therefore, the temperature change of the inlet air when the filter 47 is clogged due to the influence of the air entering from the filter 47 becomes small.

  Therefore, in this embodiment, the installation position of the inlet air temperature sensor 410 is further improved.

  FIG. 9 is a diagram illustrating a second example of installation of the inlet air temperature sensor 410 that detects a change in the temperature of the inlet air with respect to the indoor unit 40. In the second installation example, the inlet air temperature sensor 410 is placed above the upper end of the suction port 44 and on a line connecting the indoor heat exchanger 41 and the air inlet of the turbofan 421. .

  As a result, the temperature of the shortcut air can be detected without being affected by the air that has entered from the filter 47, and the temperature change of the inlet air when the filter 47 is clogged increases.

  FIG. 10 is a graph showing a difference in the temperature change of the inlet air with respect to the clogging rate of the filter 47 during the heating operation depending on the installation position of the inlet air temperature sensor 410. In this graph, the installation rate of the inlet air temperature sensor 410 at the installation position of the second installation example is greater than the installation rate of the inlet air temperature sensor 410 at the installation position of the first installation example. It is shown that the temperature change of the inlet air is abrupt. For example, if the reference change amount, which is a reference value of the inlet air temperature change amount for detecting the clogging of the filter 47, is 3 ° C., 80% clogging of the filter 47 causes the inlet air temperature sensor 410 to be installed in the first installation example. However, it is detected when the inlet air temperature sensor 410 is installed at the installation position of the second installation example.

(Control unit for outdoor unit)
In this embodiment, the inlet air temperature sensor 410 of the indoor unit 40 installed at the position of the first installation example shown in FIG. 8 or the position of the second installation example shown in FIG. 9 detects the inlet air temperature. . Here, the position of the first installation example and the position of the second installation example are comprehensively referred to as predetermined positions in the direction in which the air that has undergone heat exchange by the heat exchanger flows due to the occurrence of a short circuit. Can do. Therefore, the inlet air temperature sensor 410 can be said to be an example of a measuring unit that measures the temperature of air at a predetermined position. Then, the inlet air temperature sensor 410 transmits the inlet air temperature to the control device 37 of the outdoor unit 30. Thereby, the control device 37 of the outdoor unit 30 determines whether or not the filter 47 is clogged based on the change in the inlet air temperature. Whether the filter 47 is clogged may be determined by a control device (not shown) of the indoor unit 40 or the centralized controller 20, but in the following, it is determined by the control device 37 of the outdoor unit 30. The functional configuration and operation will be described.

  FIG. 11 is a diagram illustrating a functional configuration example of the control device 37. The control device 37 is an example of an abnormality detection device, and as illustrated, an inlet air temperature receiving unit 371, an initial inlet air temperature storage unit 372, a reference change amount storage unit 373, a filter clogging determination unit 374, A determination result transmission unit 375;

  The inlet air temperature receiving unit 371 detects the initial inlet air temperature during the air conditioning operation (hereinafter referred to as “initial inlet air temperature”) immediately after the start of the air conditioning operation during the air conditioning operation within a predetermined time after the start of the air conditioning operation. The received inlet air temperature (hereinafter referred to as “detected inlet air temperature”) is received from the inlet air temperature sensor 410 of the indoor unit 40, respectively. In this embodiment, the initial inlet air temperature is used as an example of the first temperature, and the detected inlet air temperature is used as an example of the second temperature. Moreover, the inlet air temperature receiving part 371 is provided as an example of the acquisition means which acquires 1st temperature and 2nd temperature.

  The initial inlet air temperature storage unit 372 stores the initial inlet air temperature received by the inlet air temperature receiving unit 371 immediately after the start of the air conditioning operation.

  The reference change amount storage unit 373 stores a reference change amount that is a reference value when the change amount of the inlet air temperature is evaluated. In this embodiment, a reference change amount is used as an example of a predetermined threshold value.

  The filter clogging determination unit 374 obtains a difference between the initial inlet air temperature stored in the initial inlet air temperature storage unit 372 and the detected inlet air temperature received by the inlet air temperature reception unit 371 within a predetermined time after the start of the cooling / heating operation. This is the amount of change in inlet air temperature. Then, it is determined whether or not the filter 47 is clogged by checking whether or not the condition that the inlet air temperature change amount is larger than the reference change amount stored in the reference change amount storage unit 373 is satisfied. . Note that the condition that the amount of change in the inlet air temperature is larger than the reference change amount is merely an example, and it can be generalized as a predetermined condition.

  When the filter clogging determination unit 374 determines that the filter 47 is clogged, the determination result transmission unit 375 transmits the fact to the outside. In this embodiment, a determination result transmission unit 375 is provided as an example of an output unit that outputs information indicating that the filter is clogged.

  FIG. 12 is a flowchart showing an operation example of the control device 37 having such a configuration. This operation starts simultaneously with the start of the cooling operation or the heating operation.

  When a certain indoor unit 40 starts a cooling operation or a heating operation, first, an inlet air temperature sensor 410 of the indoor unit 40 detects an inlet air temperature immediately after the start of the cooling operation or the heating operation, and this inlet air temperature, that is, an initial inlet temperature. The air temperature is transmitted to the control device 37. As a result, in the control device 37, the inlet air temperature receiving unit 371 receives the initial inlet air temperature (step 301). The initial inlet air temperature is stored in the initial inlet air temperature storage unit 372.

  In addition, the inlet air temperature sensor 410 of the indoor unit 40 periodically detects the inlet air temperature in the time after the initial inlet air temperature is detected, and this inlet air temperature, that is, the detected inlet air temperature is sent to the control device 37. Send. Thereby, in the control device 37, the inlet air temperature receiving unit 371 receives the detected inlet air temperature (step 302). The detected inlet air temperature is delivered to the filter clogging determination unit 374.

  Thereafter, the filter clogging determination unit 374 obtains a difference between the detected inlet air temperature received from the inlet air temperature receiving unit 371 and the initial inlet air temperature stored in the initial inlet air temperature storage unit 372, and obtains this difference. The amount of change is set (step 303). Then, it is determined whether or not the inlet air temperature change amount is larger than the reference change amount stored in the reference change amount storage unit 373 (step 304).

  As a result, if it is determined that the inlet air temperature change amount is not larger than the reference change amount, it is considered that the filter 47 is not yet clogged. Therefore, in this case, the filter clogging determination unit 374 determines whether or not a predetermined time has elapsed since the start of the cooling operation or heating operation of the indoor unit 40 (step 305). If it is determined that the predetermined time has not elapsed, the process returns to step 302, and the inlet air temperature receiving unit 371 waits for the next detected inlet air temperature.

  On the other hand, if it is determined that the inlet air temperature change amount is larger than the reference change amount, the filter clogging determination unit 374 determines that the filter 47 of the indoor unit 40 is clogged (step 306). Then, the determination result is transmitted to the determination result transmission unit 375, and the determination result transmission unit 375 transmits the determination result to the outside (step 307). Here, examples of the outside include the display unit of the indoor unit 40, the centralized controller 20 shown in FIG. 1, the remote controller 50 shown in FIG.

(effect)
In this embodiment, the filter clogging of the indoor unit is determined based on the inlet air temperature that changes depending on the degree of clogging. As a result, the progress of clogging of the filter 47 can be detected with high accuracy.

  When the filter 47 is not clogged, the temperature of the air passing through the filter 47 and sent by the turbo fan 421 is detected. Therefore, the normal room temperature control is not adversely affected.

<Second Embodiment>
The air conditioning system 1 shown in FIG. 13 performs the operation of the air conditioner 10 that cools and heats the room and dehumidifies the room, the ventilator 70 that ventilates the indoor air and the outside air, and the air conditioner 10 and the ventilator 70. And a control unit 90 for controlling. In the following description, when it is described as cooling, heating or cooling operation, or heating operation, it refers to that performed by operating the air conditioner 10.

  The air conditioner 10 includes an indoor unit and an outdoor unit, and heats and cools the room by transmitting heat between the two units. A well-known configuration can be widely applied. The air conditioner 10 is controlled in air conditioning operation according to the operation schedule set in the control unit 90.

  As shown in FIG. 14, the ventilator 70 includes a first passage 721 and a second passage 722 that communicate between the outside and the room, and further heat exchange between the first passage 721 and the second passage 722. A heat exchange mechanism, and an air supply blower and an exhaust blower (not shown) for generating an air flow. The first passage 721 includes a supply valve (not shown) and is a passage for supplying the outside air into the room. The outside air is introduced by operating the blower while the supply valve is open. . Similarly, the second passage 722 includes an exhaust valve (not shown) and is a passage for exhausting indoor air to the outside. The indoor air is operated by operating the blower while the exhaust valve is open. Discharged. The intake valve and the exhaust valve are opened and closed independently from each other by a control unit 90 described later. In FIG. 14, the flow of outside air is indicated by solid arrows, and the flow of room air is indicated by broken arrows.

  An outdoor temperature / humidity measuring sensor 74 for measuring outdoor temperature and humidity is provided at the outdoor end 721a of the first passage 721. Similarly, an indoor temperature / humidity measurement sensor 75 for measuring indoor temperature and humidity is provided at the indoor side end 722a of the second passage 722. Output signals output from the outdoor temperature / humidity measurement sensor 74 and the indoor temperature / humidity measurement sensor 75 are respectively input to the control unit 90 and used to calculate PMV, which is a sensation index in preliminary operation described later.

  The function of the control unit 90 is realized by a so-called computer including a CPU, a memory, an I / O interface, a drive circuit, and the like. The controller 90 controls the air conditioner so as to perform the air conditioning operation in accordance with the set schedule by the air conditioning system program including the air conditioning control program and the ventilation preliminary operation control program built in the memory. The air conditioner 10 functions as a unit 91 and controls the air conditioner 10 so as to achieve a set temperature, air volume, and the like, and also functions as a ventilation control unit 92 that controls the ventilator 70. In other words, the control unit 90 includes a ventilation control unit 92 that controls the ventilation device 70, and the ventilation control unit 92 performs ventilation operation for ventilating indoor air when performing the cooling operation and the heating operation. Control ventilation operation when not in operation. The control of the cooling operation and the heating operation may be widely known in this field.

  The ventilation control unit 92 controls the ventilator 70 so that the preliminary operation is performed during the period until the cooling operation is started when a predetermined condition is established during the ventilation operation. In this embodiment, the PMV described above is adopted as a basis for the predetermined condition.

  PMV is determined based on six elements, which are thermal environment elements, such as air temperature, average radiation temperature, airflow, humidity, clothing amount, and metabolic rate (activity amount). The outdoor temperature, outdoor humidity, indoor temperature, and indoor humidity are measured based on the output signals output from the outdoor and indoor temperature / humidity measuring sensors 74 and 75 described above. The airflow is measured based on the airflow of the air supply blower and the exhaust blower of the ventilation device 70. The air flow may be set based on the air volume set in the air conditioner 10. Further, other thermal environment elements that are difficult to actually measure are stored in the memory as a database. Then, predetermined conditions in the ventilation operation and the preliminary operation are set by the obtained PMV and the constant.

  Next, the control procedure of the ventilation operation and the preliminary operation in the ventilation control unit 92 will be described with reference to FIG. In this embodiment, the time for starting the cooling operation is set in the control unit 90, and during the period until the start time of the cooling operation, the ventilation operation is performed according to the conditions and the cooling operation is performed. Preliminary operation is performed before the start of operation.

  The ventilation operation introduces outside air into the room through the first passage 721 of the ventilation device 70 and exhausts the room air to the outside through the second passage 722. The ventilation operation is performed until the cooling operation is started. To do. In the ventilation operation, first, an outdoor temperature based on output signals from the outdoor temperature / humidity measurement sensor 74 and the indoor temperature / humidity measurement sensor 75, an outdoor humidity, an indoor humidity, an indoor temperature, an indoor humidity, and a thermal environment element other than the temperature / humidity obtained by referring to the database. Based on the above, indoor PMV and outdoor PMV are calculated (S901). The calculated indoor PMV and outdoor PMV are temporarily stored in the memory.

  Next, it is determined whether or not the calculated outdoor PMV is equal to or less than a first determination value obtained by subtracting a constant, for example, 0.3 from the calculated indoor PMV (S902). The operation mode of the apparatus 70 is set to “no heat exchange” (S903). Note that the setting in step 903 includes changing the operation mode to “no heat exchange” if the operation mode of the ventilator 70 is “with heat exchange” at this time.

  The operation mode “without heat exchange” is an operation mode in which heat exchange is not performed between the outside air and the room air without operating the heat exchange mechanism of the ventilation device 70. On the other hand, the operation mode “with heat exchange” is an operation mode in which the heat exchange mechanism of the ventilation device 70 is operated to exchange heat between the outside air and the room air.

  If the outdoor PMV exceeds the first determination value in S902, it is determined whether or not the outdoor PMV is larger than the second determination value obtained by adding a constant 0.3 from the indoor PMV (S904). When it determines with it being large, the operation mode of the ventilation apparatus 70 is set to "with heat exchange" (S905). Note that the setting in S905 includes changing the operation mode if the operation mode of the ventilation device 70 is “no heat exchange” at this time.

  If the outdoor PMV is equal to or smaller than the second determination value in S904, the current operation, that is, the current operation is continued (S906). That is, if the ventilation device 70 is operated in the “no heat exchange” operation mode at the time of execution of step 906, the operation is continued in the operation mode.

  In this way, during the ventilation operation, the preliminary operation start time is set one hour before the scheduled operation start time of the air conditioning system 1 or the time zone when the outside air temperature is lowest, preferably, for example, in the morning It is set at 5 o'clock (S907). This preliminary operation start time constitutes a predetermined condition for determining the execution of the preliminary operation.

  Thereafter, the current time is the preliminary operation start time, and the difference between the outdoor PMV and the indoor PMV is in the range of 0.80 to 1.12, preferably greater than the third determination value, for example, 0.96. This is determined (S908). The determination in S908 is a determination to start the preliminary operation.

  As a result of the determination, when the current time is the preliminary operation start time and the difference is larger than the third determination value, the operation of the heat exchange mechanism of the ventilator 70 is stopped, that is, “no heat exchange”. The preliminary operation is started by forcibly switching to the operation mode (S909). In the preliminary operation, outside air that is felt to be cooler than room air is introduced into the room through the first passage 721 of the ventilation device 70, and the room air is discharged outside through the second passage 722, and the room is exposed to the outside air. Cool down. Therefore, if heat exchange is performed between the outside air and the room air, the room is not cooled, and the operation mode is fixed to “no heat exchange”.

  On the other hand, if the current time does not reach the preliminary operation start time, or if the difference is one or both of the case where the difference is equal to or less than the third determination value, the current operation, for example, “no heat exchange” The ventilation operation is continued (S910).

  After executing S909 or S910, it is determined whether or not the difference between the outdoor PMV and the indoor PMV is in a range of 0.48 to 0.80, preferably, for example, less than a fourth determination value of 0.64 (S911). . If it is determined in S911 that the difference is less than the fourth determination value, the preliminary operation ends even before the scheduled operation start time (S912). If preliminary operation is not performed, the determination in S911 does not affect the operation at that time.

  If it is determined in S911 that the difference is equal to or greater than the fourth determination value, the current operation, that is, the preliminary operation is performed if the preliminary operation is being performed, and the ventilation operation is performed if the ventilation operation other than the preliminary operation is being performed. Each continues (S913).

  Thus, in this embodiment, at the preliminary operation start time set based on the scheduled operation start time, the preliminary operation is started prior to the cooling operation based on the values of the indoor PMV and the outdoor PMV instead of the indoor temperature. Decide what to do. As a result, the preliminary operation is started when there is outside air that is felt to be slightly colder than the room air, and the room air is cooled by the outside air.

  In addition, the preliminary operation is not terminated when the preset operation continuation time elapses, but when the difference between the indoor PMV and the outdoor PMV becomes less than the fourth determination value, in other words, the indoor PMV is in a more comfortable state. Since the process is terminated when approaching a value close to a certain outdoor PMV, the cooling capacity of the outside air is efficiently used. As a result, the preliminary operation is not performed more than necessary, or conversely, the operation time is not insufficient.

  Therefore, the room air can be cooled to a comfortable state by the outside air cooling before the cooling operation is started according to the operation schedule. Thereby, even if it starts cooling operation, since the indoor temperature is falling, the load concerning the air conditioner 10 is small and power consumption can be reduced. Therefore, energy saving can be achieved efficiently.

  Specifically, when the outside air temperature is 21 ° C. and the indoor temperature at this time is 27 ° C., a preliminary operation (outside air cooling) that sets a start time and an end time according to the control procedure in the present embodiment. ), The room temperature could be lowered to 24.8 ° C. If the cooling operation is performed after the preliminary operation, the power consumption for one hour from the start of the cooling operation can be reduced by 18.3% compared to the case where the preliminary operation is not performed, and the power consumption of the same day Was reduced by 2.9 percent.

  Similarly, when the outside air temperature is 24 ° C. and the indoor temperature at this time is 27 ° C., the indoor temperature can be lowered to 25.5 ° C. by performing the preliminary operation. If the cooling operation is performed after the preliminary operation, the power consumption for one hour from the start of the cooling operation can be reduced by 13.2% compared to the case where the preliminary operation is not performed, and the daily power consumption can be reduced. A reduction of 2.2 percent was possible.

  Thus, by performing the preliminary operation in the present embodiment prior to the cooling operation, the indoor cooling load can be reduced, and as a result, power consumption can be reduced in the cooling operation following the preliminary operation. .

  Further, by linking the schedule operation and the preliminary operation, it is possible to prevent a wasteful outdoor air cooling operation by the ventilator 70 on an indoor non-use day such as a holiday. As a result, the energy saving effect can be further improved.

  The present invention is not limited to the above embodiment.

  In the embodiment described above, the start of the preliminary operation is determined only once at the preliminary operation start time. However, the modification described below is performed when the condition is not satisfied at the set preliminary operation start time. Thereafter, the preliminary operation start determination is repeatedly executed.

  A modification will be described with reference to FIG. Note that steps S901 to S907 in the above embodiment are the same even in the modified example, and thus the description thereof is omitted.

  After S907, the determination of the start of the preliminary operation is after the preliminary operation start time or the preliminary operation start time and before the scheduled operation start time or the scheduled operation start time, in other words, until the final preliminary operation end time, Repeatedly execute (S928). That is, when it is determined that the current time exceeds the preliminary operation start time or the preliminary operation start time and is before the preliminary operation end time or the preliminary operation end time (“Yes” in S928), the outdoor PMV is next. Is determined to be larger than the first predetermined value (“Yes” in S929), the preliminary operation is started (S930). In this modification, the start of the preliminary operation is determined by S928 and S929.

  On the other hand, when it is determined in S929 that the difference is equal to or smaller than the first predetermined value, the current operation is continued as in Step 910 (S931). In S928, when the current time exceeds the preliminary operation end time, that is, the scheduled operation start time, this control is ended.

  If it is determined that the difference is less than the second predetermined value after starting the preliminary operation (“Yes” in S932), the preliminary operation is ended even before the scheduled operation start time (S933). On the other hand, if the difference is greater than or equal to the second predetermined value, the current operation is continued as in step S913 (S934).

  In this modified example, if the preliminary operation is finished before the scheduled operation start time, that is, if the current time after the completion of the preliminary operation is before the preliminary operation end time (scheduled operation start time) (“Yes” in S928). ), S929 is executed again, and when the difference is larger than the first predetermined value, the preliminary operation is started again (S930).

  Therefore, in this modification, it is possible to intermittently repeatedly execute the preliminary operation until the scheduled operation start time. In this case, if the difference between the outdoor PMV and the indoor PMV does not become less than the second predetermined value after the preliminary operation is resumed until the scheduled operation start time (“No” in S932), the scheduled operation start time is reached. At this point, the preliminary operation ends. That is, in this case, the end of the preliminary operation is not determined by the outdoor PMV and the indoor PMV.

  In this way, by configuring so that the start and end of the preliminary operation can be determined as long as time permits until the scheduled operation start time, after the preliminary operation ends, for example, the indoor temperature again due to the indoor thermal load or radiant heat. Alternatively, when the indoor PMV changes due to a change in humidity or the like, or the outdoor PMV changes due to a change in weather conditions or the like, the preliminary operation can be started again. Therefore, the energy saving effect can be expanded.

  In the ventilator 70 of the above embodiment, the use of two temperature / humidity measuring sensors has been described. However, as shown in FIG. 17, the room attached to the inner end 721 b that is the end of the first passage 721 on the indoor side. Only the temperature and humidity measurement sensor 751 may be used. In this case, since it is impossible to measure the outdoor temperature and the indoor temperature or the outdoor humidity and the indoor humidity of the outside air at the same time, when the operation of the ventilation device 70 is stopped, an output signal output from the indoor temperature and humidity measurement sensor 75 is used. Measure room temperature and humidity. Similarly, during the operation of the ventilation device 70, the outdoor temperature and the outdoor humidity are measured by the output signal. In other words, when the temperature / humidity sensor is provided only on one side, the ventilation control unit 92 is configured to pause the ventilation device 70 for a predetermined period when acquiring the temperature or humidity, so that the indoor / outdoor It becomes possible to measure temperature or humidity.

  Although not shown, the outdoor temperature / humidity measurement sensor 75 may be omitted, and the outdoor temperature / humidity measurement sensor may be attached to the outer end 22b, which is the end of the second passage 722 on the outdoor side. In this case, when the operation of the ventilation device 70 is stopped, the outdoor temperature and the outdoor humidity are measured by the output signal output from the outdoor temperature / humidity measurement sensor, and the indoor temperature and the indoor humidity are measured by the output signal during the operation of the ventilation device 70. Measure.

  Thus, by providing the temperature / humidity measurement sensor only on the indoor side or only on the outdoor side and omitting the outdoor side or the indoor side, the cost of the entire system can be reduced.

  In the above-described embodiment and modification, the use of indoor PMV and outdoor PMV as bodily sensation indices has been described, but enthalpy or SET * may be used. Even in the case of these body sensation indices, at least one of the start and end of the outside air cooling may be determined based on the difference between the body sensation indices in the room and the outdoors. Needless to say, the end of the outside air cooling may be determined as in the above embodiment.

  Further, in the ventilation device 70 shown in FIGS. 14 and 17, the description has been given of the one provided with the outdoor temperature / humidity measurement sensor 74, the indoor temperature / humidity measurement sensor 75, and the indoor temperature / humidity measurement sensor 751, but the temperature / humidity measurement sensor Instead of this, a temperature sensor may be provided. In this case, the humidity may be obtained from humidity information in a weather forecast or the like via the Internet or the like. Thus, cost reduction can be realized by using a temperature sensor instead of the temperature and humidity sensor.

  In the above embodiment, a database capable of outputting a corresponding value according to the season, time, date, weather, etc. has been created in advance for the thermal environment element necessary for calculating the PMV. All necessary thermal environment elements may be obtained from the Japan Meteorological Agency via the Internet.

  In addition, it goes without saying that the present invention is not limited to the above-described embodiments and modifications, and various modifications can be made without departing from the spirit of the present invention.

<Third Embodiment>
As shown in FIG. 18, the ventilating apparatus 70 according to the present embodiment includes an internal heat exchanger 720, and an exhaust passage L1 through which air flows from the room to the outside and an intake passage L2 through which air flows from the outside to the room. , A temperature sensor 730 and a humidity sensor 740 provided in the casing 710, and a ventilation control for controlling the operating state of the ventilation device 70 based on measured values obtained by the temperature sensor 730 and the humidity sensor 740 Part 80.

  The heat exchanger 720 performs heat exchange between air flowing through the exhaust flow path L1 (hereinafter also referred to as indoor air) and air flowing through the intake flow path L2 (hereinafter also referred to as outside air). The heat exchanger 720 of the present embodiment is configured to exchange heat without mixing indoor air and outside air using, for example, a heat exchange element.

  The casing 710 is disposed between the outside and the inside of the room. The casing 710 is provided with an outside air introduction port 711 through which outside air is introduced, an outside air supply port 712 for supplying outside air into the room, and room air. The indoor air introduction port 713 and the indoor air discharge port 714 for discharging the indoor air to the outside are formed.

The exhaust passage L1 formed in the casing 710 communicates the indoor air introduction port 713 and the indoor air discharge port 714. In the present embodiment, the indoor air passes through the heat exchanger 720 and goes outside. A heat exchanger 720 is formed on the exhaust flow path L1 so as to be discharged.
The exhaust flow path L1 is provided with an exhaust fan 771 for flowing room air from the indoor air introduction port 713 to the indoor air discharge port 714. In the present embodiment, heat in the exhaust flow path L1 is provided. The exhaust fan 771 is provided on the outdoor side of the exchanger 720.

The intake air flow path L2 formed in the casing 710 communicates the outside air introduction port 711 and the outside air supply port 712.
Specifically, the intake air flow path L2 is connected to the external air introduction port 711, the external air introduction flow path L21 through which the external air introduced from the external air introduction port 711 flows, and the external air is heat-exchanged by branching from the external air introduction flow path L21. The heat exchange flow path L22 that performs and the non-heat exchange flow path L23 that does not exchange heat with the outside air, the heat exchange flow path L22, and the non-heat exchange flow path L23 are formed by joining and connected to the outside air supply port 712 to supply the outside air. And an outside air supply flow path L24 for supplying outside air from the port 712 to the room.

  More specifically, the intake flow path L2 is arranged on the non-heat exchange flow path L23 so that when the external air flows into the heat exchange flow path L22, the external air is supplied to the room through the heat exchanger 720. Is formed so that the heat exchanger 720 is disposed on the heat exchange flow path L22 without the heat exchanger 720 being disposed.

  Further, in the present embodiment, the damper 760 serving as a flow path switching unit that switches the intake flow path L2 between the heat exchange flow path L22 and the non-heat exchange flow path L23 includes the heat exchange flow path L22 and the non-heat exchange flow path L23. It is provided at the connection with the outside air introduction flow path L21.

  Note that an intake fan 772 for flowing outside air from the outside air introduction port 711 to the outside air supply port 712 is provided in the above-described intake passage L2, and in this embodiment, a heat exchanger in the intake passage L2 is provided. The intake fan 772 is provided in the outside air supply flow path L24 which is on the indoor side of the room 720.

The temperature sensor 730 and the humidity sensor 740 are provided in the intake passage L2 on the indoor side of the heat exchanger 720, and measure the temperature and humidity of the outside air flowing through the intake passage L2.
More specifically, the temperature sensor 730 and the humidity sensor 740 are the temperature and humidity of the outside air that is heat-exchanged by the heat exchanger 720 and supplied indoors, and the temperature and humidity of the outside air that is supplied indoors without heat exchange. In this embodiment, both the temperature sensor 730 and the humidity sensor 740 are provided at the connection portion between the heat exchange flow path L22 and the non-heat exchange flow path L23 and the outside air supply flow path L24. Yes.

  As shown in FIG. 18, the ventilator 70 of the present embodiment changes the operating state of the ventilator 70 based on the measured temperature and measured humidity obtained by the temperature sensor 730 and the humidity sensor 740 as a heat exchanger. A ventilation control unit 80 is provided to switch between a heat exchange state in which the outside air is supplied to the room while the heat exchanger 720 performs heat exchange and a non-heat exchange state in which the heat exchanger 720 does not exchange heat and supplies the outside air to the room. Yes.

  More specifically, the ventilation control unit 80 controls the damper 760 to switch the intake flow path L2 to the heat exchange flow path L22 and the non-heat exchange flow path L23, so that the operation state of the ventilation device 70 is heat exchanged. It is configured to switch between a state and a non-heat exchange state. That is, in the non-heat exchange state, the ventilation control unit 80 switches the damper 760 so that outside air flows through the non-heat exchange flow path L23 as shown in FIG. 18, and in the heat exchange state, as shown in FIG. The damper 760 is switched so that the outside air flows through the heat exchange flow path L22.

  Specifically, the ventilation control unit 80 is physically provided with a CPU, a memory, an A / D converter, a D / A converter, etc., and functionally, as shown in FIG. It functions as an acquisition unit 81, a humidity data acquisition unit 82, a comfort index calculation unit 83, and a switching unit 84.

  The temperature data acquisition unit 81 receives a signal from the temperature sensor 730, and acquires the measured temperature of the air flowing through the intake flow path L2 measured by the temperature sensor 730.

  The humidity data acquisition unit 82 receives a signal from the humidity sensor 740, and acquires the measured humidity of the air flowing through the intake flow path L2 measured by the humidity sensor 740.

  The comfort index calculation unit 83 calculates a comfort index of the air flowing through the intake air flow path L2 based on the measurement temperature and the measurement humidity obtained by the temperature data acquisition unit 81 and the humidity data acquisition unit 82. In this embodiment, the comfort index, PMV or SET *, is calculated using the measured temperature, measured humidity, average radiation temperature, wind speed, clothing amount, and activity amount.

The switching unit 84 switches the operating state of the ventilator 70 between the heat exchange state and the non-heat exchange state based on the PMV or SET * calculated by the comfort index calculation unit 83. In the present embodiment, The intake passage L2 is switched between the heat exchange passage L22 and the non-heat exchange passage L23 by transmitting a switching signal to the damper 760 and switching the damper 760.
Specifically, the switching unit 84, in a state where the intake flow path L2 is switched to the heat exchange flow path L22 (heat exchange state), the PMV or SET * calculated by the comfort index calculation unit 83 and the intake flow path L2. Is switched to the non-heat exchange flow path L23 (non-heat exchange state), and the operation state of the ventilator 70 is compared with the heat exchange state by comparing with PMV or SET * calculated by the comfort index calculation unit 83. And a non-heat exchange state.

Next, operation | movement of the ventilation control part 80 mentioned above is demonstrated with reference to the flowchart of FIG.
Here, a case will be described in which the ventilation control unit 80 switches between a heat exchange state and a non-heat exchange state using PMV, which is a comfort index, in a state where the ventilation device 70 is in a cooling operation.

  First, when the operation of the ventilator 70 is started, the ventilation control unit 80 switches the intake air flow path L2 to the non-heat exchange flow path L23 to change the operation state of the ventilator 70 to the non-heat exchange state (S801). .

Next, for example, a measurement time of a timer (not shown) is used to wait for a predetermined time t1 to elapse in a non-heat exchange state (S802), and the measurement temperature obtained by the temperature sensor 730 and the humidity sensor 740 after the predetermined time t1 has elapsed. Based on the measured humidity, the comfort index PMV _HEXless of the air flowing through the intake air flow path L2 in the non-heat exchange state is calculated (S803).

  Subsequently, the ventilation control unit 80 switches the intake air flow path L2 to the heat exchange flow path L22 and changes the operation state of the ventilation device 70 to the heat exchange state (S804).

Then, the measurement time of the timer is used to wait for a predetermined time t2 to elapse in the heat exchange state (S805), and after the predetermined time t2 has elapsed, the measurement temperature and the measurement humidity obtained by the temperature sensor 730 and the humidity sensor 740 are set. Based on this, the comfort index PMV _HEX of the air flowing through the intake passage L2 in the heat exchange state is calculated (S806).

Here, the PMV _HEX and the PMV _HEXless are compared (S807). If the PMV _HEX is smaller than the PMV _HEXless , the operation state of the ventilator 70 is changed to the heat exchange state (S808), and the PMV _HEX is more than the PMV _HEXless. If larger, the operation state of the ventilator 70 is changed to a non-heat exchange state (S809).

  Further, the ventilation control unit 80 of the present embodiment waits for a predetermined time t3 to elapse using the measurement time of the timer after switching the operation state of the ventilation device 70 in S808 or S809 (S810). It is set to return to S801 again after a predetermined time t3 has elapsed.

  Next, experimental data will be described with reference to FIG.

As can be seen from FIG. 22, it is understood that the power consumption of the ventilator 70 can be reduced in the case where the comfort index PMV is compared and the operation state of the ventilator 70 is switched (this time) compared to the conventional case. .
In this embodiment, the power consumption can be reduced by 2.8% per year compared to the conventional case, and the maximum can be reduced by 3.8% per day.

  According to the ventilator 70 according to the present embodiment configured as described above, the ventilation control unit 80 compares the PMV and switches between the heat exchange state and the non-heat exchange state. The comfort index can be compared with high accuracy, the comfort of the air conditioning in the ventilation device 70 can be improved, and as a result, the energy saving effect can be improved and the power consumption can be reduced.

  Moreover, since the comfort parameter | index of a cooling / heating is compared accurately and the driving | running state of the ventilation apparatus 70 is switched, generation | occurrence | production of the user complaint by comfort fall can be reduced.

  Furthermore, in the past, the temperature sensor 730 and the humidity sensor 740 had to be provided indoors and outdoors, whereas the temperature sensor 730 and the humidity sensor 740 may be provided in the outside air supply flow path L24. The manufacturing cost can be reduced as compared with the prior art.

  The present invention is not limited to the above embodiment.

  For example, in the ventilator 70 of the above embodiment, the temperature sensor and the humidity sensor are provided in the outside air supply channel, but as shown in FIG. 23, the temperature sensor 730 and the humidity sensor 740 are provided in the outside air supply channel L24. The second temperature sensor 731 and the second humidity sensor 741 may be provided in the exhaust flow path L1.

More specifically, as shown in FIG. 24, when the operation of the ventilation device 70 is started, the ventilation control unit 80, in the non-heat exchange state, the second temperature sensor 731 provided in the exhaust flow path L1 and Based on the measured value of the second humidity sensor 741, the PMV _i of the room air is measured (S851).

Next, the ventilation control unit 80 measures the PMV _o of the outside air based on the measured values of the temperature sensor 730 and the humidity sensor 740 provided in the outside air supply flow path L24 in the non-heat exchange state (S852).

Subsequently, the ventilation control unit 80 compares PMV _i and PMV _o (S853). When PMV _i is smaller than PMV _o , the ventilation control unit 80 sets the heat exchange state (S854), and PMV _i is larger than PMV _o. In that case, a non-heat exchange state is set (S855).

  Then, in S854 or S855, after the operating state of the ventilation device 70 is switched, for example, using a measurement time of a timer (not shown), the process waits for a predetermined time t4 (S856), and after the predetermined time t4 has elapsed, again repeats S851. Is set to return.

  With this configuration, the ventilation control unit 80 calculates the PMV or SET * of the outside air and the PMV or SET * of the indoor air, and compares them to change the operation state of the ventilator 70 from the heat exchange state. Since it can switch to a heat exchange state, control by the ventilation control part 80 becomes easy.

  Moreover, in the said embodiment, although the ventilation control part 80 switched the operating state of the ventilator 70 using PMV, you may make it switch the operating state of the ventilator 70 using SET *.

  Furthermore, although the said embodiment demonstrated the cooling operation time, it is preferable to comprise so that the driving | running state of the ventilation apparatus 70 may be switched using a comfort parameter also at the time of heating operation.

In addition, in the said embodiment, although the ventilation control part 80 compared PMV _HEX and PMV _HEXless , in a heat exchange state, it compares PMV _HEX and PMV _HEXless +0.1, and is not heat-exchanged. In the state, PMV _HEX and PMV _HEXless −0.1 may be compared.

  In addition, in the above embodiment, the temperature sensor and the humidity sensor are provided in the outside air supply flow path, but the temperature sensor and the humidity sensor may be provided in the outside air supply port or in the vicinity thereof.

  In addition, it goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

<Fourth embodiment>
The air conditioning system 1 shown in FIG. 25 performs the operation of the air conditioner 10 that cools and heats the room and dehumidifies the room, the ventilator 70 that ventilates the indoor air and the outside air, and the air conditioner 10 and the ventilator 70. And a control unit 90 for controlling. In the following description, when it is described as cooling, heating or cooling operation, or heating operation, it refers to that performed by operating the air conditioner 10.

  The air conditioner 10 includes an indoor unit and an outdoor unit, and heats and cools the room by transmitting heat between the two units. A well-known configuration can be widely applied.

  As the ventilator 70, for example, the one shown in FIG. 14 can be used. Alternatively, the one shown in FIG. 18 can be used. However, when the one shown in FIG. 18 is used, one temperature sensor 730 is provided for each of the outside air introduction port 711 and one for the indoor air introduction port 713 as in the case shown in FIG. Shall be provided.

  The control unit 90 is an example of an air conditioning control device, and its function is realized by a so-called computer having a CPU, a memory, an I / O interface, a drive circuit, and the like. And the control part 90 functions as the air-conditioning control part 93 which controls the air conditioner 10 so that it may become set temperature, an air volume, etc. by the program for air-conditioning systems which consists of the air-conditioning control program and ventilation control program which were incorporated in memory. And it functions also as the ventilation control part 94 which controls the presence or absence of the heat exchange in the ventilation apparatus 70, etc. That is, in the control unit 90, the air conditioning control unit 93 controls the cooling operation or the heating operation, and the ventilation control unit 94 controls the ventilation operation for ventilating the room air. The control of the cooling operation and the heating operation may be widely known in this field. In the present embodiment, an air conditioning control unit 93 is provided as an example of the first control unit, and a ventilation control unit 94 is provided as an example of the second control unit. Further, the control unit 90 may perform the operation of the control unit 90 in the second embodiment and the operation of the ventilation control unit 80 in the third embodiment.

  Next, a procedure for controlling the indoor unit 40 of the air conditioner 10 by the air conditioning control unit 93 and controlling the ventilation device 70 by the ventilation control unit 94 during the cooling operation will be described with reference to FIG.

  When the operation of the air conditioner 10 and the ventilation device 70 is started, the air conditioning control unit 93 first acquires the room temperature (step 941). When the ventilation device 70 shown in FIG. 14 is used, the room temperature may be acquired based on an output signal from the room temperature / humidity measurement sensor 75.

Next, the air conditioning control unit 93 performs indoor temperature tracking control. Here, the indoor temperature tracking control is control for adjusting the indoor unit 40 of the air conditioner 10 so that the indoor temperature becomes the target indoor temperature. Specifically, the air conditioning controller 93 calculates a room temperature range (hereinafter referred to as “comfortable room temperature range”) in which the comfort index is a value within a predetermined range (step 942). PMV or SET ^* may be used as the comfort index. Among these, PMV is a value calculated from six parameters of room temperature, humidity, airflow, thermal radiation, metabolic rate, and clothing amount, and the measured value acquired in step 941 is used for room temperature. In addition, the air conditioning control unit 93 sets a target indoor temperature that is a target indoor temperature of the outdoor unit 30 of the air conditioner 10 (step 943). In order to save energy, for example, the highest indoor temperature within a comfortable room temperature range may be selected as the target indoor temperature. Further, the air conditioning control unit 93 transmits the target indoor temperature to the indoor unit 40 (step 944).

  Thereafter, the air conditioning controller 93 controls the indoor temperature by controlling the cooling of the indoor unit 40 (step 945). Thereby, the room temperature gradually approaches the target room temperature.

On the other hand, the ventilation control unit 94 acquires the room temperature as a result of the room temperature tracking control being performed (step 946). When the ventilation device 70 shown in FIG. 14 is used, the room temperature may be acquired based on the output signal from the room temperature / humidity measurement sensor 75. Thereby, the ventilation control part 94 calculates the comfort index PMV _i of room air (step 947).

Next, the ventilation control unit 94 acquires the outside air temperature (step 948). When the ventilation device 70 shown in FIG. 14 is used, the outside air temperature may be acquired based on the output signal from the outdoor temperature / humidity measurement sensor 74. Thus, the ventilation control section 94 calculates the outside air comfort index PMV _o (step 949).

Thereafter, the ventilation control unit 94 compares PMV _i and PMV _o (step 950), and when PMV _i is smaller than PMV _o , sets the ventilator 70 to a heat exchange state (step 951). If PMV _i is greater than PMV _o , the ventilator 70 is set to no heat exchange (step 952).

  Then, in step 951 or 952, after the operating state of the air conditioner 10 is switched, for example, using a measurement time of a timer (not shown), waiting for a predetermined time t5 (step 953), and the predetermined time t5 has elapsed. Later, it is set to return to step 941 again.

  Next, a procedure for controlling the indoor unit 40 of the air conditioner 10 by the air conditioning controller 93 and controlling the ventilation device 70 by the ventilation controller 94 during the heating operation will be described with reference to FIG.

  Steps 961 to 964 are the same as Steps 941 to 944 in FIG. After execution of step 964, the air conditioning controller 93 controls the indoor temperature by controlling the heating of the indoor unit 40 (step 965). Thereby, the room temperature gradually approaches the target room temperature.

Steps 966 to 969 are the same as steps 946 to 949 in FIG. After execution of step 969, the ventilation control unit 94 compares PMV _i and PMV _o (step 970), and if PMV _i is larger than PMV _o , sets the ventilator 70 to be in a heat exchange state ( Step 971) If PMV _i is smaller than PMV _o , the ventilator 70 is set to no heat exchange (step 972).

  Then, in step 971 or step 972, after the operation state of the air conditioner 10 is switched, for example, using a measurement time of a timer (not shown), the process waits for a predetermined time t5 (step 973), and the predetermined time t5 has elapsed. Later, it is set to return to step 961 again.

  In the above embodiment, after the air conditioning control unit 93 transmits the target indoor temperature to the indoor unit 40 and performs the indoor temperature tracking control, the ventilation control unit 94 performs the indoor temperature tracking control. The room temperature is acquired, but this is not the case. As a result of the indoor temperature tracking control being performed, the indoor temperature approaches the target indoor temperature. Therefore, the ventilation control unit 94 receives the target indoor temperature from the air conditioning control unit 93, and the indoor temperature tracking control is performed as a result. It is good also as indoor temperature.

<Fifth embodiment>
The air conditioning system 1 of the present embodiment constitutes, for example, a building multi-type air conditioner having a plurality of indoor units, and is configured to be able to control the air conditioning operation of each indoor unit from an external control room. .

  More specifically, the air conditioning system 1 is used for weather information and the like that can be acquired from the Internet or the like in a control room, measurement values that can be acquired from sensors provided in each indoor unit, information that can be acquired, and the like. Based on this, each air conditioner is controlled by PMV, which is a comfort index.

  As shown in FIG. 28, the air conditioning system 1 according to the present embodiment has at least a humidity estimation device 14 and a current comfort index calculation in order to enable air conditioning operation using PMV even if each indoor unit does not include a humidity sensor. Unit 15 and air-conditioning control unit 16. A part of the air conditioning system 1 is constituted by a so-called computer including a CPU, a memory, an input / output device, and the like, and the functions of the above-described units are exhibited by executing a program stored in the memory. It is.

  Each part will be described. In the following description, the water vapor amount may be read as absolute humidity.

  The humidity estimation device 14 estimates the initial indoor relative humidity in the room corresponding to each indoor unit at the time when the air-conditioning operation is started, and then estimates the change in the amount of water vapor in the room, and the change in the amount of water vapor is estimated. By reflecting the initial indoor relative humidity, the current indoor relative humidity is estimated.

  That is, the humidity estimation device 14 includes an initial indoor relative humidity estimation unit 141, a dehumidified water vapor amount estimation unit 142, a ventilation water vapor amount estimation unit 143, and a current indoor relative humidity estimation unit 144.

  The initial indoor relative humidity estimation unit 141 is the relative humidity in the initial state of the room without using a humidity sensor according to weather information acquired through the Internet or the like, and a room temperature measured by a room temperature sensor provided in the indoor unit. The initial indoor relative humidity is estimated.

  More specifically, the initial indoor relative humidity estimation unit 141 first calculates the outdoor water vapor amount from the outdoor air temperature and the external air relative humidity acquired from the weather information, and based on the outdoor air water vapor amount, The initial indoor water vapor amount, which is the water vapor amount, is estimated.

  That is, the initial indoor relative humidity estimation unit 141 calculates the outdoor air saturated water vapor pressure by substituting the outdoor air temperature into the Tetens equation shown in Equation 1, and the obtained outdoor air saturated water vapor pressure is the gas state equation shown in Equation 2. Substituting into, the outside air saturated water vapor amount is calculated. Thereafter, the initial indoor relative humidity estimation unit 141 calculates the outdoor air water vapor amount by multiplying the outdoor air saturated water vapor amount by the outdoor air relative humidity as shown in Equation 3.

ここで、Ｅ_Ｏは外気飽和水蒸気圧、Ｔ_Ｏは外気温度、Ａｓ_Ｏは外気飽和水蒸気量、Ａ_Ｏは外気水蒸気量、Ｈｒ_Ｏは外気相対湿度である。

Here, E 2 _O is the outside air saturated water vapor pressure, T 2 _O is the outside air temperature, As 2 _O is the outside air saturated water vapor amount, A 2 _O is the outside air water vapor amount, and Hr 2 _O is the outside air relative humidity.

  And the said initial indoor relative humidity estimation part 141 makes the amount of outdoor air water vapor | steam calculated using the fact that there is almost no difference in the amount of water vapor | steam in the room | chamber interior and the outdoor at the time of starting an air-conditioning operation, The initial indoor relative humidity is calculated by dividing the initial indoor water vapor amount by the indoor saturated water vapor amount determined at the initial room temperature. The initial indoor relative humidity estimated in this way has an error of only about 5% with respect to the actually measured value, and only the weather information and room temperature are sufficient for the relative humidity at the time of starting the air conditioning operation. It can be seen that it can be estimated with high accuracy.

  The dehumidified water vapor amount estimation unit 142 estimates the amount of water vapor in the room that decreases due to the dehumidifying action of the cooling operation from the initial state to the present time. More specifically, the dehumidified water vapor amount estimation unit 142 is configured to estimate the dehumidified water vapor amount based on the rated cooling capacity of the indoor unit and the latent heat ratio.

  The rated cooling capacity is a value calculated by dividing the indoor volume by the cooling capacity of the indoor unit to be controlled. Here, the cooling capacity of the indoor unit is a value that can be acquired in advance, and the indoor volume is used when the size of the room in which the indoor unit is installed is known. It can be obtained by applying the size of the room where the indoor unit is recommended to be installed.

  On the other hand, the dehumidified water vapor amount estimation unit 142 is configured to estimate the latent heat ratio based on the initial indoor water vapor amount, the initial room temperature which is the room temperature in the initial state, and the evaporation temperature of the refrigerant in the evaporator. is there. That is, the dehumidified water vapor amount estimation unit 142 obtains the sensible heat ratio using the relationship described in the wet air diagram as shown in FIG. 29 and the initial indoor water vapor amount, initial room temperature, and evaporation temperature, The latent heat ratio is calculated.

  Specifically, the dehumidified water vapor amount estimation unit 142 calculates the enthalpy corresponding to the combination of the initial indoor water vapor amount (initial indoor absolute humidity) calculated by the initial indoor relative humidity estimation unit 141 and the initial room temperature to the humid air. Obtain from the diagram. Similarly, the dehumidified water vapor amount estimation unit 142 acquires an evaporation temperature from, for example, a temperature sensor provided in a refrigerant pipe near the evaporator, and acquires an enthalpy when the evaporation temperature and the relative humidity are 100%. The dehumidified water vapor amount estimation unit 142 calculates the sensible heat ratio (SHF) by dividing the difference between the enthalpies by the difference between the initial room temperature and the evaporation temperature. This corresponds to the slope of a straight line connecting the suction air point and the evaporator contact air point in the wet air diagram of FIG. Thereafter, the dehumidified water vapor amount estimation unit 142 calculates a latent heat ratio by 1-SHF based on the definition. In this way, the dehumidified water vapor amount estimation unit 142 can calculate the latent heat ratio reflecting the indoor initial state and the evaporation temperature.

  Further, the dehumidified water vapor amount estimation unit 142 calculates the dehumidified water vapor amount by multiplying the cooling capacity per unit volume by the latent heat ratio and dividing the value by the coagulation latent heat of water. The dehumidified water vapor amount estimation unit 142 is configured to operate only during the cooling operation and calculate the dehumidified water vapor amount, and does not operate during the heating operation where no dehumidification occurs.

  The ventilation water vapor amount estimation unit 143 estimates the ventilation water vapor amount that is the amount of water vapor flowing into and out of the room by ventilation from the initial state to the present time. More specifically, the ventilation water vapor amount estimation unit 143 calculates the amount of water vapor flowing in and out by multiplying the ventilation rate of indoor air per unit time by the difference between the outdoor air water vapor amount and the indoor water vapor amount as shown in Equation 4. It is configured to calculate.

ここで、Ａ_ｄは流出入する水蒸気量である換気水蒸気量、Ａ_Ｏは外気水蒸気量、Ａ_Ｐは室内水蒸気量、Ｖは換気率である。

Here, the A _d ventilation water vapor is water vapor content to flow in and out, the A _O ambient air water vapor content, the A _P indoor water vapor, V is a ventilation rate.

  In addition, the said ventilation rate uses the value, when the value of the room in which the indoor unit is provided is known, and uses a general recommended value when it does not understand. For example, in the Building Standard Law, it is determined that about 1% of air is ventilated per minute as a ventilation rate, so this value may be used. Moreover, the amount of outside water vapor is calculated from weather relative humidity and outside air temperature by acquiring weather information from the Internet or the like. Further, as the indoor water vapor amount, not only the initial water vapor amount but also the current indoor water vapor amount calculated by the current indoor relative humidity estimating unit 144 described later is used sequentially so that the ventilated water vapor amount estimating unit 143 Is estimated.

  The current indoor relative humidity estimation unit 144 calculates an initial indoor relative humidity, a dehumidified water vapor amount, a ventilation water vapor amount, and a current indoor relative humidity that is a current relative humidity after a predetermined time has elapsed from an initial state based on the current room temperature. It is configured to estimate.

  Specifically, the current indoor relative humidity estimation unit 144 subtracts the dehumidified water vapor amount and the ventilation water vapor amount from the initial indoor water vapor amount calculated from the initial indoor relative humidity and the initial room temperature, that is, lost from the air. The current indoor water vapor amount, which is the current indoor water vapor amount, is calculated by subtracting the water vapor amount. The current indoor relative humidity estimation unit 144 is configured to calculate the current indoor relative humidity by dividing the current indoor water vapor amount by the saturated water vapor amount determined by the current room temperature.

  As described above, the humidity estimation device 14 accurately estimates the current indoor relative humidity by reflecting the dehumidified water vapor amount and the ventilation water vapor amount sequentially from the accurately estimated initial relative humidity and initial indoor water vapor amount. can do.

  The current comfort index calculation unit 15 is an example of a comfort index calculation unit, and is based on the current room relative humidity estimated by the humidity estimation device 14, the room temperature, the average radiation temperature, the airflow speed, the activity amount, and the amount of clothes. The current PMV, which is a comfort index, is calculated. Here, regarding the room temperature, the average radiation temperature, and the airflow velocity, which are parameters other than the indoor relative humidity at the present time, values measured or acquired by the sensor of the indoor unit are used. Regarding the amount of activity and the amount of clothes, estimated values or predetermined values are used based on the date, time zone, or the like.

  The air conditioning control unit 16 controls the air conditioning operation so that the current comfort index becomes a target comfort index. More specifically, the target PMV is achieved by appropriately changing the set temperature of each indoor unit so that the current PMV becomes the target PMV.

  As described above, according to the air conditioning system 1 of the present embodiment, even if the indoor unit does not include a humidity sensor, the temperature sensor provided in the indoor unit, the temperature of the refrigerant pipe, the weather information that can be acquired via the Internet, and the like. The indoor relative humidity can be accurately estimated, and the PMV can be accurately calculated based on the indoor relative humidity. Therefore, the air-conditioning operation is performed by the PMV that accurately reflects the indoor situation, so that energy saving can be achieved while maintaining comfort.

  In addition, the air conditioning system 1 according to the present embodiment can be applied to an air conditioning system that does not include an existing humidity sensor. For example, only rewriting a program improves comfort and promotes energy saving. Can do.

  Other embodiments will be described.

  In the above embodiment, the latent heat ratio is calculated, but a predetermined value may be used. Further, the air conditioning operation may be controlled using not only PMV but also other indices such as SET * as the comfort index.

  In addition, various modifications and combinations of embodiments may be performed without departing from the spirit of the present invention.

<Sixth Embodiment>
[First embodiment]
The air conditioning system 1 according to the first embodiment is a building multi-type in which a refrigeration cycle is formed by a plurality of outdoor units and a plurality of indoor units, and centrally manages the operation of each outdoor unit and indoor unit. In addition, a control device C is provided that estimates the amount of clothes of the user and controls the air conditioning of each room based on the result.

  More specifically, the indoor unit is provided with a temperature sensor D1, a humidity sensor D2, and an infrared sensor D3 so as to measure room temperature, humidity, and thermal radiation in the air-conditioned room, and the control device C calculates PMV, which is a comfort index, based on values measured by these sensors, a predetermined metabolic rate, and an estimated amount of clothes, and sets a target room temperature based on the calculated PMV. It is constituted as follows.

  The control device C is configured by a so-called computer including a CPU, a memory, an A / D, a D / A converter, an input / output device, and the like, and a program stored in the memory is executed to execute FIG. At least the relationship storage unit C1, the temperature acquisition unit C2, the representative temperature calculation unit C3, the weather / room temperature acquisition unit C4, the relationship acquisition unit C5, the clothing amount estimation unit C6, the comfortable room temperature range calculation unit C7, as shown in the functional block diagram of FIG. Functions as the target room temperature setting unit C8 and the device control unit C9.

  Each part will be described in detail.

The relationship storage unit C1 stores the weather / room temperature-clothing amount relationship, which is the relationship between the weather or room temperature used in the clothing amount estimating unit C6, and the clothing amount, for each temperature category. . The weather / room temperature-clothing amount relationship stored in the relationship storage unit C1 of the first embodiment is a clothing amount estimation formula described by a linear expression with the coefficient of room temperature as a variable. is there. That is, the clothing amount estimation formula is described as clothing amount = a _ci × room temperature + b _ci , and each subscript of each coefficient a _ci and b _ci represents c as a temperature category and i as weather. More specifically, in the first embodiment, when the air temperature is 8 ° C. or lower (c = 1), when it is higher than 8 ° C. and lower than 23 ° C. (c = 2), when it is higher than 23 ° C. (c = 3) The relationship storage unit C1 stores clothing amount estimation formulas having different coefficients for each of the three temperature categories. Furthermore, the coefficient of the clothing amount estimation formula is varied depending on the type of weather as well as each temperature category. In the first embodiment, clear (i = 1), cloudy (i = 2), rain (i = 3), The coefficient of the clothing amount estimation formula is changed according to four types of weather such as snow (i = 4). Therefore, as shown in FIG. 31, the relationship storage unit C1 stores the coefficients of the 3 × 4 = 12 clothing amount estimation formulas for each temperature category and corresponding weather.

  Here, the definition of the weather is defined based on the precipitation probability of the weather forecast and the forecast weather, but the weather such as clear, cloudy, rainy, and snow may be defined according to other criteria.

  As can be seen from FIG. 31, the clothing amount estimation formula stored in the relationship storage unit C1 is uniquely determined only by the temperature, the weather, and the room temperature, regardless of the date and season parameters. Therefore, it can be used regardless of the climatic characteristics of the region and the date of the day introduced when estimating the amount of clothes. In other words, an appropriate clothing amount estimation formula can be used from only the temperature without considering the climate characteristics and regional characteristics anywhere in the world.

  The said temperature acquisition part C2 acquires the temperature of the day from the weather forecast data of the area where the air conditioning system 1 is provided via the internet. In the first embodiment, at least the minimum temperature forecast value and the maximum temperature forecast value, and the information about the minimum temperature generation time and the maximum temperature generation time are acquired.

  The representative temperature calculation unit C3 calculates a representative temperature used to select one of a plurality of weather / room temperature-clothing amount relationships stored in the relationship storage unit C1 in the relationship acquisition unit C5 described later. To do. The representative temperature is a temperature calculated by the representative temperature calculation unit C3 based on the minimum temperature forecast value and the maximum temperature forecast value acquired in the temperature acquisition unit C2.

  More specifically, as shown in the graph of FIG. 32, the representative temperature calculation unit C3 first has two points: a minimum temperature forecast value and a time when the minimum temperature is reached, and a maximum temperature forecast value and a time when the maximum temperature is reached. The daily time-temperature change function is created using three linear equations. That is, the first equation, which is a primary expression showing the temperature change from 0:00 to the lowest temperature time, and the lowest temperature time to the highest temperature time so that the temperature change becomes one cycle between 0:00 and 24:00. The time-temperature change function is created so that the temperature change is expressed by the second expression that is the primary expression indicating the temperature change up to and the third expression that is the primary expression indicating the temperature change from the highest temperature time to 24:00. The

  The representative temperature calculation unit C3 outputs the integrated average of the time-temperature change function in the active period, which is a time zone in which a person is in the target space where air conditioning is performed from 0:00 to 24:00, as the representative temperature. It is configured. In the first embodiment, the activity period is set between 8 o'clock and 19 o'clock, but the time period of the activity period can be appropriately set according to the specification mode of air conditioning.

  The weather / room temperature acquisition unit C4 acquires the weather and room temperature, and includes a weather acquisition unit C41 and a room temperature acquisition unit C42. The weather acquisition unit C41 acquires the weather and precipitation probability of the day in the area where the air conditioning system 1 is provided via the Internet. The room temperature acquisition unit C42 is configured to acquire the room temperature measurement value measured by the temperature sensor D1 as the room temperature.

  Based on the temperature acquired by the temperature acquisition unit C2, the relationship acquisition unit C5 selects the weather / temperature of the corresponding temperature category from among the plurality of weather / room temperature-clothing amount relationships stored in the relationship storage unit C1. The relationship between room temperature and clothing amount is acquired. In the first embodiment, the corresponding clothing amount estimation formula based on the temperature classification including the representative temperature calculated in the representative temperature calculation unit C3 and the weather and the probability of precipitation acquired in the weather acquisition unit C41 is described above. The relationship acquisition unit C5 is configured to acquire.

  The clothing amount estimation unit C6 estimates the clothing amount based on the clothing amount estimation formula acquired by the relationship acquisition unit C5 and the room temperature acquired by the weather / room temperature acquisition unit C4. In the first embodiment, the clothing amount is calculated by substituting the room temperature, which is a variable, into the primary expression of the clothing amount estimation formula acquired by the relationship acquisition unit C5.

  The comfortable room temperature range calculation unit C7 calculates a room temperature range where the comfort index PMV is a value within a predetermined range. Here, the PMV is a value calculated from six parameters of room temperature, humidity, airflow, thermal radiation, metabolic rate, and clothing amount by a comfort index calculation unit (not shown) which is an example of a comfort index calculation unit. Yes, the amount of clothes estimated by the amount-of-clothes estimation unit C6 is used for the amount of clothes, and the values measured by the temperature sensor D1, the humidity sensor D2, and the infrared sensor D3 are used for humidity and heat radiation. . For the airflow, the airflow currently set in the device control unit C9 described later is used, and for the metabolic rate, a value estimated from the amount of human movement obtained from the infrared sensor D3 is used. In the first embodiment, the comfort room temperature range calculation unit C7 calculates a room temperature range in which the PMV is in a range of −0.7 to 0.7 from parameters other than room temperature, for example. It is configured.

  The target room temperature setting unit C8 selects a room temperature that is most energy-saving in the comfortable room temperature range calculated by the comfortable room temperature range calculation unit C7, and sets the target room temperature in the device control unit C9. More specifically, the highest temperature in the comfortable room temperature range is set as the target room temperature during the cooling operation, and the lowest temperature in the comfortable room temperature range is set as the target room temperature during the heating operation.

  The device control unit C9 controls the compressor, the expansion valve, the outdoor fan, the indoor fan, and the like so that the room temperature measurement value measured by the temperature sensor D1 becomes the temperature set as the target room temperature. That is, feedback control is performed on each device so that the deviation between the room temperature measurement value and the target room temperature becomes small.

  The operation of the air conditioning system 1 of the first embodiment configured as described above will be described with reference to the flowchart of FIG.

  When the cooling operation or the heating operation is started, first, the room temperature of the room to be air-conditioned is measured by the temperature sensor D1 (step S1).

  Next, weather data is acquired via the Internet in the temperature acquisition unit C2 and the weather acquisition unit C41, and the minimum temperature forecast value, minimum temperature occurrence time, maximum temperature forecast value, maximum temperature occurrence time, weather forecast, precipitation probability, etc. are stored. Is done. The representative temperature calculation unit C3 calculates a representative temperature based on the acquired minimum temperature forecast value, minimum temperature occurrence time, maximum temperature forecast value, and maximum temperature occurrence time (step S2).

  Then, the relationship acquisition unit C5 obtains a clothing amount estimation formula for the corresponding temperature category and weather category based on the weather forecast and precipitation probability acquired in step S2 and the representative temperature calculated by the representative temperature calculation unit C3. Obtained from the relationship storage unit C1. Further, the clothing amount estimation unit C6 calculates the clothing amount by substituting the room temperature measured in step S1 into the acquired clothing amount estimation formula (step S3).

  Further, the humidity is measured by the humidity sensor D2 (step S4).

  Next, the comfortable room temperature range calculation unit C7 is currently set in the clothing control unit C9, the clothing amount estimated by the clothing amount estimation unit C6, the humidity, thermal radiation, and metabolic rate measured by each sensor. A comfortable room temperature range in which the PMV falls within a range of, for example, −0.7 to 0.7 is calculated from the air volume (step S5).

  And the said target room temperature setting part C8 selects the temperature which becomes the most energy saving from the comfortable room temperature range calculated in step S4, and sets it to the said apparatus control part C9 as target temperature. Specifically, the highest temperature is set as the target room temperature in the comfortable room temperature range during the cooling operation, and the lowest temperature is set as the target room temperature during the heating operation (steps S6 and S7).

  Thereafter, the device control unit C9 controls each unit of the indoor unit and the outdoor unit so that the room temperature becomes the target room temperature (step S8).

  Thereafter, the operations from step S1 to step S8 are repeated in a predetermined control cycle. In the first embodiment, the control cycle is set to a short cycle of about 3 minutes, and each value is updated each time a new control cycle is started. By using a short control cycle, it is possible to prevent hunting caused by a change in room temperature or the like.

  About the estimation accuracy of the amount of clothes, the set target room temperature, and the energy saving effect in the air conditioning system 1 of the first embodiment and the prior art air conditioning system 1 as disclosed in JP-A-2006-349240 Compare the cooling operation.

  In FIG. 34, when the room temperature changes by 2K, it is assumed that the clothing amount changes by 0.1 unit, the actual clothing amount estimated by the clothing amount estimation unit C6 of the first embodiment, the conventional amount The clothing amount estimated based on the clothing amount estimation formula set by the date as a technology is shown. As apparent from FIG. 34, the conventional technique estimates a larger value than the actual clothing amount, whereas the clothing amount estimation unit C6 of the first embodiment has a substantially actual clothing amount. It can be seen that the amount of clothing is equal.

  Next, FIG. 35 shows a comparison result when the same PMV calculation is performed based on these clothing amount estimation results and the optimum target room temperature is calculated. As shown in FIG. 35, in the first embodiment, a target room temperature of 27 ° C. to 28 ° C. is set, whereas in the prior art, the target room temperature is set in a range of 26 ° C. to 27 ° C. That is, since the prior art estimates the amount of clothes excessively, the target room temperature is set to a high temperature accordingly, resulting in excessive cooling.

  The graph of FIG. 36 is shown about the comparison result of the energy saving effect in this case. Here, the energy saving effect is calculated from the result of FIG. 35 based on the fact that there is an energy saving effect of about 7% at an increase of room temperature 1K from the experimental result. As shown in FIG. 36, when the first embodiment is compared with the prior art, the first embodiment can accurately estimate the amount of clothes, while maintaining comfort while maintaining the comfort. In comparison, the energy saving effect can be improved by 6.5%.

  As described above, according to the air conditioning system 1 of the first embodiment, the relationship storage unit C1 stores the clothing amount estimation formula determined only by the temperature and the weather regardless of the month and day. The same can be used even in the climate. In other words, since it is not necessary to create a database for estimating the amount of clothes for each area where it is introduced, the same control device can be used. Therefore, it is possible to introduce the same air conditioning system 1 almost without customization in accordance with the regional characteristics, and it is possible to quickly deploy to each region at low cost.

  Further, in the conventional method, since the average clothing amount characteristic set in advance on the day of the month is used, the estimation error of the clothing amount is large, whereas in the air conditioning system 1 of the first embodiment, that day Since the most suitable one of the plurality of clothing amount estimation formulas is selected based on the temperature forecast value and the weather forecast, the amount of clothing can be estimated with high accuracy. As a result, as shown in FIGS. 34 to 36, it is possible to enhance the energy saving effect as compared with the conventional technique while maintaining comfort.

  FIG. 37 shows another comparison result when the same PMV calculation is performed based on these clothing amount estimation results and the optimum target room temperature is calculated. As shown in FIG. 37, the target room temperature of 26.5 ° C. to 27 ° C. is set in the first embodiment, whereas the target room temperature is set in the range of 26 ° C. to 26.5 ° C. in the prior art. become. That is, since the prior art estimates the amount of clothes excessively, the target room temperature is set to a high temperature accordingly, resulting in excessive cooling.

  The graph of FIG. 38 is shown about the comparison result of the energy saving effect in this case. Here, the energy saving effect is calculated from the result of FIG. 37 based on the fact that there is an energy saving effect of about 7% when the temperature rises by 1 K from the experimental result. As shown in FIG. 38, when the first embodiment is compared with the prior art, the first embodiment can accurately estimate the amount of clothes, while maintaining comfort while maintaining the comfort. Compared with this, the energy saving effect can be improved by 4.1%.

  As described above, according to the air conditioning system 1 of the first embodiment, the relationship storage unit C1 stores the clothing amount estimation formula determined only by the temperature and the weather regardless of the month and day. The same can be used even in the climate. In other words, since it is not necessary to create a database for estimating the amount of clothes for each area where it is introduced, the same control device can be used. Therefore, it is possible to introduce the same air conditioning system 1 almost without customization in accordance with the regional characteristics, and it is possible to quickly deploy to each region at low cost.

  In addition, since the conventional method estimates the amount of clothing using the directly measured temperature, it cannot be added to the estimation of the amount of clothing for the future temperature, and measurement errors due to the installation status of the measurement sensor, etc. In contrast to the amount estimation error, the air conditioning system 1 of the first embodiment estimates the amount of clothing based on the temperature forecast value and weather forecast of the day, so the amount of clothing can be accurately determined. It is possible to estimate. Furthermore, since the most appropriate one of the plurality of clothing amount estimation formulas is selected based on the representative temperature calculated based on the forecast value, the estimation accuracy of the clothing amount can be further increased. Due to these reasons, as shown in FIGS. 34 and 37 to 38, it is possible to enhance the energy saving effect as compared with the prior art while maintaining comfort.

[Second Embodiment]
Next, an air conditioning system 1 according to a second embodiment will be described. In addition, the same code | symbol shall be attached | subjected about the member corresponding to a 1st Example.

  Compared with the first embodiment, the air conditioning system 1 of the second embodiment has a weather / room temperature-clothing amount relationship stored in the relationship storage section C1, the configuration of the representative temperature calculation section C3, and a room temperature acquisition section. The control loop is different from C42.

  Each point will be described in detail.

  The relationship storage unit C1 of the second embodiment stores, for each of a plurality of temperature categories, a clothing amount estimation table in which a clothing amount corresponding to the weather or room temperature is set as the weather / room temperature-clothing amount relationship. As shown in FIG. 39, the clothing amount estimation table is stored in each temperature category, and the clothing amount is uniquely determined by the combination of the weather and the room temperature.

  As shown in FIG. 40, the representative air temperature calculation unit C3 of the second embodiment is configured to calculate, as the representative temperature, the integrated average of the time-temperature change function throughout the day as the representative air temperature.

  The room temperature acquisition unit C42 acquires the target room temperature as the room temperature in the second embodiment, while the room temperature measurement value acquired from the temperature sensor D1 is the room temperature in the first embodiment.

  Then, the relationship acquisition unit C5 of the second embodiment acquires the clothing amount estimation table of the temperature classification corresponding to the representative temperature calculated in the representative temperature calculation unit C3 from the relationship storage unit C1, and the clothing amount estimation unit C6 In this clothing amount estimation table, it is output as the clothing amount of the combination of the target room temperature and the weather.

  Further, the operation of the second embodiment is different from that of the first embodiment as shown in the flowchart of FIG. The difference will be described below.

  In the second embodiment, step S1 ′ for setting the temperature measurement value measured by the temperature sensor D1 as the initial target room temperature is inserted between step S1 and step S2 in the flowchart of FIG. 33 of the first embodiment. First of all, it is different.

  In the first embodiment, steps S1 to S8 are repeated as shown in FIG. 33 as a control cycle, whereas in the second embodiment, steps S2 to S8 are performed as shown in FIG. It is configured to repeat. That is, in the second embodiment, there is no step of measuring the room temperature at the beginning of each control cycle, and the amount of clothes is estimated based on the temperature currently set as the target room temperature.

  When such a control loop is formed, the target room temperature is not changed so frequently. Therefore, a control cycle having a long cycle of about 20 minutes can be used to reduce the calculation load.

  In the air conditioning system 1 of the second embodiment, the amount of clothes can be estimated with high accuracy as in the first embodiment, so that an energy saving effect can be obtained while maintaining comfort.

[Other embodiments]
Other embodiments will be described.

  For example, as shown in FIG. 42, the representative temperature calculation unit may be an average value of the lowest temperature forecast value and the highest temperature forecast value.

  In the above embodiment, PMV is used as the comfort index. However, for example, a comfortable temperature range may be calculated based on another comfort index such as SET * and used for air conditioning control.

  The temperature acquired by the temperature acquisition unit may be, for example, not only the forecast value of the weather data but also the temperature actually measured at a meteorological observatory or a 100-leaf box. However, since the maximum temperature has not been measured at the start of air conditioning control such as in the morning, it is necessary to use a forecast value in such a case.

  The weather acquisition unit is configured to acquire the weather from the forecast, but may acquire the weather from, for example, nearby sky image data.

  The range of the comfort index necessary for obtaining the comfortable temperature range may be changed as appropriate according to whether priority is given to comfort or energy saving effect. For example, in the case of PMV, if priority is given to the comfort of more people, the range may be set to a narrow range near 0, and a larger range may be set to increase the energy saving effect.

  In each of the above embodiments, the relationship acquisition unit selects one clothing amount estimation formula corresponding to the temperature classification based on the temperature and the weather, or selects one clothing amount estimation table corresponding only to the temperature, The amount estimation unit estimated the amount of clothes based only on room temperature, or on the basis of weather and room temperature. That is, in the estimation of the amount of clothing, the amount of clothing is estimated by three parameters of temperature, weather, and room temperature in each embodiment, but the amount of clothing is estimated only by temperature and weather, and only by temperature and room temperature. It doesn't matter. In short, the relationship acquisition unit selects one of the clothing amount estimation formulas or the clothing amount estimation table set for each temperature category based on the temperature, and the subsequent calculation calculates the clothing amount by either the weather or room temperature. The amount calculation unit may calculate it. When only room temperature is used for estimating the amount of clothes, the weather acquisition unit may be omitted.

  In addition, various modifications and combinations of embodiments can be made without departing from the spirit of the present invention.

<Seventh embodiment>
[Configuration of air conditioning system]
As a schematic configuration of the air conditioning system 1 according to the present embodiment, the one shown in FIG. 1 can be used. That is, the air conditioning system 1 according to the present embodiment includes a plurality of air conditioners 10 and a centralized controller 20 that controls the plurality of air conditioners 10. The air conditioner 10 includes, for example, an outdoor unit 30 installed on the rooftop of a building, a plurality of indoor units 40 installed in each part of the building, a remote controller 50 for setting the indoor units 40, and the like. And a pipe 60 through which a refrigerant that circulates to the outdoor unit 30 and the indoor unit 40 is connected to the unit 30 and the indoor unit 40.

  FIG. 43 is a block diagram showing functions of the air conditioning system 1 according to the present embodiment.

The outdoor unit 30 includes a communication unit 301 that communicates with the centralized controller 20 and the indoor unit 40, and an outdoor unit control unit 302 that controls the operation of the outdoor unit 30.
The communication unit 301 receives an operation control command from the centralized controller 20 or the indoor unit 40.
The outdoor unit control unit 302 includes a CPU, a ROM, a RAM, and the like, and controls the operation of the outdoor unit 30 based on operation control commands received from the centralized controller 20 and the indoor unit 40.

The indoor unit 40 communicates with the temperature controller 411 that detects the temperature of the installation site, the humidity sensor 412 that detects the humidity of the installation site, the remote controller 50 using infrared rays, and the central controller 20 and the outdoor unit 30. A communication unit 413 and an indoor unit control unit 414 that controls the operation of the indoor unit 40 are provided.
The communication unit 413 receives the user set temperature Tu transmitted from the remote controller 50, which is the temperature at which the user has changed the set temperature. The communication unit 413 transmits the temperature detected by the temperature sensor 411, the humidity detected by the humidity sensor 412, and the received user set temperature Tu to the centralized controller 20 and the outdoor unit 30. The communication unit 413 receives operation control commands from the centralized controller 20 and the outdoor unit 30.
The indoor unit control unit 414 includes a CPU, a ROM, a RAM, and the like, and controls the operation of the indoor unit 40 based on operation control commands received from the centralized controller 20 and the outdoor unit 30.

The remote controller 50 controls an operation of the input unit 501 for inputting room temperature, a display unit 502 configured by a liquid crystal display, a communication unit 503 that communicates with the indoor unit 40 using infrared rays, and the remote controller 50. And a remote control unit 504. The remote control control unit 504 includes a CPU, a ROM, a RAM, and the like.
Then, the remote controller 50 transmits a user set temperature Tu, which is a temperature changed by the user via the input unit 501, to the indoor unit 40 via the communication unit 503 under the control of the remote control unit 504.

  Each of the outdoor units 30 and each of the indoor units 40 includes an outdoor unit control unit 302 and an indoor unit control unit 414. Control command values and the like are transmitted between the outdoor unit 30, the indoor unit 40, and the centralized controller 20. An air conditioning control network for communication is configured.

  In the air conditioner 10 configured as described above, the temperature of the air-conditioning target space such as the target room (the first room 101 or the second room 102 in FIG. 1) whose air temperature is to be adjusted is the concentration controller 20. Operates at the set temperature. In addition, when the user changes the set temperature via the remote controller 50, the temperature of the air-conditioning target space is set to the user set temperature Tu.

[First embodiment]
Next, the centralized controller 20 according to the first embodiment will be described.
The centralized controller 20 includes a communication unit 201 that communicates with the air conditioner 10 and a control unit 202 that controls the air conditioner 10.

  The communication unit 201 receives the detected temperature of the temperature sensor 411, the detected humidity of the humidity sensor 412, and the user set temperature Tu transmitted from the indoor unit 40 of the air conditioner 10. In addition, the communication unit 201 transmits an operation control command to the air conditioner 10.

The control unit 202 includes a CPU, a ROM, a RAM, and the like.
The control unit 202 includes a room temperature grasping unit 221 that grasps the temperature (room temperature) of a room (air conditioning target space) whose air temperature is adjusted by the air conditioner 10, and a humidity grasping unit that grasps the humidity of the air conditioning target space. 222, an average radiation temperature estimation unit 223 that estimates the average radiation temperature Tr of the air conditioning target space, and an airflow speed estimation unit 224 that estimates the airflow velocity in the air conditioning target space. Moreover, the control part 202 is provided with the activity amount estimation part 225 which estimates the activity amount of the person who exists in the air conditioning object space, and the clothing amount estimation part 226 which estimates the clothing amount Cl of the person who exists in the air conditioning object space. ing.

The control unit 202 also includes the room temperature grasped by the room temperature grasping unit 221, the humidity grasped by the humidity grasping unit 222, the average radiation temperature Tr estimated by the average radiation temperature estimating unit 223, the airflow velocity estimated by the airflow velocity estimating unit 224, Based on the activity amount estimated by the activity amount estimation unit 225 and the clothing amount Cl estimated by the clothing amount estimation unit 226, a PMV calculation unit 227 is provided that calculates a PMV value as an indoor comfort level (comfort index). . In the present embodiment, the PMV calculation unit 227 is provided as an example of the comfort index calculation unit.
In addition, the control unit 202 uses a PMV value calculated by the PMV calculation unit 227 to calculate a set temperature to be set as the temperature of the air-conditioning target space, and a user sets the set temperature via the remote controller 50. A user set temperature grasping unit 229 for grasping the above-described user set temperature Tu when changed.

  The room temperature grasping unit 221 grasps the temperature detected by the temperature sensor 411 provided in the indoor unit 40 as the room temperature of the room in which the indoor unit 40 is disposed. When there are a plurality of indoor units 40 in the same room, the room temperature grasping unit 221 may grasp the average value of the temperatures detected by the temperature sensors 411 provided in the plurality of indoor units 40 as the room temperature, or specify The temperature detected by the temperature sensor 411 provided in the indoor unit 40 may be grasped as the room temperature.

The humidity grasping unit 222 grasps the humidity detected by the humidity sensor 412 provided in the indoor unit 40 as the humidity of the room in which the indoor unit 40 is disposed. When there are a plurality of indoor units 40 in the same room, the humidity grasping unit 222 may grasp the average value of the humidity detected by the humidity sensor 412 provided in the plurality of indoor units 40 as the humidity. The detected value of the humidity sensor 412 provided in the indoor unit 40 may be grasped as humidity.
The average radiation temperature estimation unit 223 will be described in detail later.

  The airflow velocity estimation unit 224 can exemplify reading the airflow information stored in advance in the storage area and estimating the airflow velocity. Alternatively, an airflow sensor may be provided in the air conditioning target space, and the airflow velocity estimation unit 224 may estimate the airflow velocity in the room based on the detection value of the airflow sensor attached to the room.

  The activity amount estimation unit 225 can exemplify estimating the activity amount by the magnitude of the output value of the activity amount sensor using infrared rays, for example. For example, an activity amount sensor that can generate a pulse when a room is divided with infrared rays, etc., and a person crosses the divided area by moving, etc., and the amount of activity is detected by the number of pulses in a certain period. The activity amount estimation unit 225 is provided in the air conditioning target space, and estimates the activity amount based on the output value from the activity amount sensor.

  The clothing amount estimation unit 226 can exemplify reading the value for each season and weather stored in advance in the storage area and estimating the read value as the clothing amount Cl. Alternatively, it is possible to exemplify estimating a clothing amount Cl by substituting the room temperature grasped by the room temperature grasping unit 221 or the detected outside air temperature into a relational expression stored in advance in the storage area. .

  The PMV calculation unit 227 uses the arithmetic expression described in the international standard ISO-7730 defined by the International Organization for Standardization (ISO), which is stored in a storage area such as a ROM in advance, as a PMV value. Is calculated. That is, the PMV calculation unit 227 includes the room temperature grasped by the room temperature grasping unit 221, the humidity grasped by the humidity grasping unit 222, the average radiation temperature estimated by the average radiation temperature estimation unit 223, the airflow velocity estimated by the airflow velocity estimation unit 224, The PMV value is calculated based on the six parameters of the activity amount estimated by the activity amount estimation unit 225 and the clothing amount Cl estimated by the clothing amount estimation unit 226 and the arithmetic expression stored in advance.

The set temperature calculation unit 228 acquires the PMV value calculated by the PMV calculation unit 227, and uses this PMV value and an arithmetic expression stored in advance in a storage area such as a ROM to set the set temperature of the air conditioning target space. Is calculated. And the preset temperature calculation part 228 controls the air conditioner 10 according to the calculated preset temperature, and adjusts the room temperature of air-conditioning object space. That is, the set temperature calculation unit 228 functions as a control unit that controls the operation of the air conditioner 10 so that the temperature is set based on the PMV value calculated by the PMV calculation unit 227.
The user set temperature grasping unit 229 obtains the user set temperature Tu by acquiring the user set temperature Tu from the indoor unit 40 of the air conditioner 10.

Next, the average radiation temperature estimation unit 223 will be described in detail.
(First aspect)
The average radiation temperature estimation unit 223 performs an average radiation temperature estimation process described below to estimate the average radiation temperature Tr.
The average radiation temperature estimation unit 223 first sets a reference average radiation temperature Tb. This process is a process of setting the room temperature grasped by the room temperature grasping unit 221 as the reference average radiation temperature Tb.

Thereafter, the average radiation temperature estimation unit 223 determines whether or not the set temperature has been changed by the user. This is a process of determining whether or not the user set temperature grasping unit 229 has grasped the user set temperature Tu. When the user set temperature Tu is grasped, it is determined that the set temperature has been changed by the user. And when it changes, based on the user setting temperature Tu which the user setting temperature grasping part 229 grasped and the following formula (1), back calculation average radiation temperature Ti is calculated.
Ti = f3 (Tu) (1)
Here, f3 (t) is a function for calculating the reverse calculation average radiation temperature Ti from the user set temperature Tu.

  The average radiant temperature estimating unit 223 sets the PMV value to, for example, zero when calculating the back-calculated average radiant temperature Ti based on the equation (1), and the humidity and airflow velocity estimating unit grasped by the user set temperature Tu and the humidity grasping unit 222. The airflow velocity estimated by 224, the activity amount estimated by the activity amount estimation unit 225, and the clothing amount Cl estimated by the clothing amount estimation unit 226 are used as parameters. It should be noted that the humidity grasped by the humidity grasping unit 222, the airflow velocity estimated by the airflow velocity estimating unit 224, the activity amount estimated by the activity amount estimating unit 225, and the activity amount estimated by the activity amount estimating unit 225 are used as parameters. It can be exemplified that the PMV value used to calculate the room temperature set by the set temperature calculator 228 is the same as the parameter used by the PMV calculator 227 to calculate. Alternatively, the current value may be used. Further, the PMV value may be other value instead of zero.

Thereafter, the average radiation temperature estimation unit 223 calculates an average radiation temperature difference Td (= Ti−Tb) that is a difference between the reference average radiation temperature Tb and the reverse calculation average radiation temperature Ti.
Thereafter, the average radiation temperature estimation unit 223 sets the average radiation temperature difference Td as the average radiation temperature correction value Or in the indoor unit 40.

Then, the average radiation temperature estimation unit 223 estimates a value obtained by adding the average radiation temperature correction value Or to the reference average radiation temperature Tb as the average radiation temperature Tr (Tr = Tb + Or).
On the other hand, when the set temperature is not changed by the user, the average radiation temperature estimation unit 223 estimates the reference average radiation temperature Tb as the average radiation temperature Tr (Tr = Tb).

Next, the procedure of the average radiation temperature estimation process performed by the average radiation temperature estimation unit 223 will be described using a flowchart.
FIG. 44 is a flowchart showing the procedure of the average radiation temperature estimation process performed by the average radiation temperature estimation unit 223. The average radiation temperature estimation unit 223 repeatedly executes this average radiation temperature estimation process every predetermined period.

  First, the average radiation temperature estimation unit 223 sets a reference average radiation temperature Tb (step (hereinafter, simply referred to as “S”) 241). Thereafter, it is determined whether or not the set temperature has been changed by the user (S242). If the set temperature has not been changed by the user (No in S242), the reference average radiation temperature Tb is estimated as the average radiation temperature Tr (Tr = Tb) (S243).

  On the other hand, when the set temperature has been changed by the user (Yes in S242), the back-calculated average radiation temperature Ti is calculated based on the user set temperature Tu grasped by the user set temperature grasping unit 229 and the above-described equation (1). (S244). After that, the average radiation temperature estimation unit 223 calculates an average radiation temperature difference Td that is a difference between the reference average radiation temperature Tb calculated in S241 and the reverse calculation average radiation temperature Ti calculated in S244 (S245). Then, the average radiation temperature estimation unit 223 sets the average radiation temperature difference Td calculated in S245 as the average radiation temperature correction value Or (S246). Then, the average radiation temperature estimation unit 223 estimates a value obtained by adding the average radiation temperature correction value Or calculated in S246 to the reference average radiation temperature Tb calculated in S241 as an average radiation temperature Tr (Tr = Tb + Or). (S247).

  According to the air conditioning system 1 according to the present embodiment described above, the average radiation temperature estimator 223 performs the average radiation temperature estimation process, so that the average radiation temperature correction value Or according to the difference in the installation position of the indoor unit 40. Is calculated and used, the average radiation temperature Tr can be estimated with high accuracy. That is, the average radiation temperature estimation unit 223 performs this average radiation temperature estimation process, so that the characteristics of the installation position of the indoor unit 40 in the room, for example, the distance between the indoor unit 40 and the window, the size of the window, and the like. The error of the average radiation temperature Tr due to the difference in the installation positions of the indoor units can be automatically corrected. As a result, the PMV calculation unit 227 can calculate the PMV value with high accuracy, and the set temperature calculation unit 228 sets the temperature at which both user comfort and energy saving can be achieved.

Once the average radiation temperature correction value Or is calculated, the average radiation temperature correction value Or may be taken into account when calculating the average radiation temperature Tr thereafter. That is, when setting the reference average radiation temperature Tb, instead of setting the room temperature grasped by the room temperature grasping unit 221 as the reference average radiation temperature Tb, the reference average radiation temperature Tb is expressed using the following equation (2). Should be calculated.
Tb = room temperature grasped by room temperature grasping unit 221 + Or (2)
Thereby, since the reference average radiation temperature Tb is set with high accuracy, it is considered that the user has less chance to change the set temperature via the remote controller 50. As a result, it is possible to realize an air conditioning that can achieve both user comfort and energy saving without the user's operation via the remote controller 50.

(Second aspect)
The average radiation temperature estimation unit 223 according to the second aspect stores the average radiation temperature correction value Or for each difference between the outside air temperature and the room temperature (the range of the difference between the outside air temperature and the room temperature arbitrarily divided), The point which estimates average radiation temperature Tr using average radiation temperature correction value Or according to the difference of outside temperature and room temperature differs from average radiation temperature estimating part 223 concerning the 1st mode.
That is, the average radiant temperature estimation unit 223 according to the second aspect is configured to calculate the average radiant temperature correction value Or and the difference between the outside air temperature and the room temperature when the average radiant temperature correction value Or is calculated (an arbitrarily divided outside air temperature). And the range of difference between room temperature and room temperature). Then, when calculating the reference average radiation temperature Tb using the above-described equation (2), the average radiation temperature estimation unit 223 calculates the average radiation temperature correction value Or corresponding to the difference between the outside air temperature and the room temperature at that time. Use.

  Thus, by calculating and storing the average radiation temperature correction value Or for each difference between the outside air temperature and the room temperature, it is possible to consider the characteristics of the mean radiation temperature Tr that varies depending on the outside air temperature. It is possible to estimate with higher accuracy, and the accuracy of comfort evaluation is further improved. Therefore, the energy saving effect can be expanded. In addition, the average radiation temperature estimation part 223 can illustrate having grasped | ascertained external temperature using the temperature sensor provided in the concentration controller 20. FIG.

(Third aspect)
The average radiant temperature estimation unit 223 according to the third aspect stores an average radiant temperature correction value Or for each weather such as sunny weather, cloudy weather, and rainy weather, and uses the average radiant temperature correction value Or according to the weather to calculate the average radiant temperature correction value Or. The point which estimates the radiation temperature Tr differs from the average radiation temperature estimation part 223 which concerns on a 1st aspect.
That is, the average radiation temperature estimation unit 223 according to the third aspect stores the average radiation temperature correction value Or and the weather when the average radiation temperature correction value Or is calculated in association with each other. Then, when calculating the reference average radiation temperature Tb using the above-described equation (2), the average radiation temperature estimation unit 223 uses the average radiation temperature correction value Or corresponding to the weather at that time.

Thus, by calculating and storing the average radiation temperature correction value Or for each weather, it is possible to consider the characteristics of the average radiation temperature Tr that varies depending on the weather, so that the average radiation temperature Tr can be estimated with higher accuracy. This improves the accuracy of comfort evaluation. Therefore, the energy saving effect can be expanded.
In addition, the average radiation temperature estimation part 223 can illustrate having grasped the weather using the pyranometer provided in the concentration controller 20.

[Second Embodiment]
Next, the centralized controller 20 according to the second embodiment will be described.
The centralized controller 20 according to the second embodiment is different from the centralized controller 20 according to the first embodiment in the clothing amount estimation unit 226.
Hereinafter, the clothing amount estimation unit 226 of the centralized controller 20 according to the second embodiment will be described.

(First aspect)
The clothing amount estimation unit 226 performs a clothing amount estimation process described below to estimate the clothing amount Cl.
First, the clothing amount estimation unit 226 calculates a reference clothing amount Cb based on the following equation (3).
Cb = f1 (T1) + Oo + Os + Ow (3)
Here, T1 is the room temperature grasped by the room temperature grasping unit 221.
f1 (t) is a function for calculating a base clothing amount serving as a base for the reference clothing amount Cb from room temperature t.
Oo is a correction value based on the outside air temperature, Os is a correction value based on the season, and Ow is a correction value based on the weather. The clothing amount estimation unit 226 can exemplify using the temperature sensor, RTC (Real Time Clock), and a pyranometer provided in the centralized controller 20 to grasp the outside air temperature, season, and weather.

For example, the clothing amount estimation unit 226 substitutes the detected outside air temperature into a control map or a calculation formula indicating the correspondence between the correction value Oo and the outside air temperature, which is created based on an empirical rule and stored in the ROM in advance. Thus, the correction value Oo is calculated. In addition, the clothing amount estimation unit 226, for example, sets the season of the air conditioning target day in a control map or a calculation formula indicating the correspondence between the correction value Os and the season, which is previously created based on an empirical rule and stored in the ROM. By substituting, the correction value Os is calculated. In addition, the clothing amount estimation unit 226, for example, sets the weather on the air-conditioning target day on the control map or the calculation formula indicating the correspondence between the correction value Ow and the weather, which is previously created based on an empirical rule and stored in the ROM. The correction value Ow is calculated by substituting.
Further, f1 (t) can be exemplified as an expression created in advance based on an empirical rule.

After calculating the reference clothing amount Cb, the clothing amount estimation unit 226 determines whether or not the set temperature has been changed by the user. This is a process of determining whether or not the user set temperature grasping unit 229 has grasped the user set temperature Tu. When the user set temperature Tu is grasped, it is determined that the set temperature has been changed by the user. And when changed, based on the user setting temperature Tu grasped by the user setting temperature grasping unit 229 and the following equation (4), the reverse calculation clothing amount Ci is calculated.
Ci = f2 (Tu) (4)
Here, f2 (t) is a function for calculating the reverse clothing amount Ci from the user set temperature Tu.

  When the clothing amount estimation unit 226 calculates the backward clothing amount Ci based on the equation (4), the PMV value is set to, for example, zero, the user set temperature Tu, the humidity grasped by the humidity grasping unit 222, and the airflow velocity estimation unit 224 The estimated airflow velocity and the activity amount estimated by the activity amount estimation unit 225 are used as parameters. It should be noted that the humidity that is grasped by the humidity grasping unit 222, the airflow velocity that is estimated by the airflow velocity estimation unit 224, and the activity amount that is estimated by the activity amount estimation unit 225, which are used as parameters, are the room temperature currently set by the set temperature calculation unit 228. It can be exemplified that the PMV value used to calculate the value is the same as the parameter used by the PMV calculation unit 227 to calculate. Alternatively, the current value may be used. As the average radiation temperature Tr estimated by the average radiation temperature estimation unit 223, the latest value estimated by the method described in the section of the first embodiment described above is used. Further, the PMV value may be other value instead of zero.

Thereafter, the clothing amount estimation unit 226 calculates a clothing amount difference Cd (= Ci−Cb), which is a difference between the reference clothing amount Cb and the reverse calculation clothing amount Ci.
Thereafter, the clothing amount estimation unit 226 sets the average value of the clothing amount differences Cd in the plurality of indoor units 40 provided in the same room as the clothing amount correction value Oc in this room. That is, the clothing amount correction value Oc is a value calculated based on the following equation (5).
Oc = Total value of clothing amount difference Cd in a plurality of indoor units 40 provided in the same room / n (5)
n is the number of indoor units 40 provided in the same room.
For example, when calculating the clothing amount correction value Oc in the first room 101, the clothing amount estimation unit 226 calculates the clothing amount difference Cd of each of the four indoor units 40 attached to the first room 101. (When the set temperature is not changed by the user, Cd = zero is calculated), and these are summed and divided by four.

Then, the clothing amount estimation unit 226 estimates a value obtained by adding the clothing amount correction value Oc to the reference clothing amount Cb as the clothing amount Cl (Cl = Cb + Oc).
On the other hand, if the set temperature has not been changed by the user, the clothing amount estimation unit 226 estimates the reference clothing amount Cb as the clothing amount Cl (Cl = Cb).

Next, the procedure of the clothing amount estimation process performed by the clothing amount estimation unit 226 will be described using a flowchart.
FIG. 45 is a flowchart illustrating a procedure of clothing amount estimation processing performed by the clothing amount estimation unit 226. The clothing amount estimation unit 226 repeatedly executes this clothing amount estimation process for each predetermined period.

  First, the clothing amount estimation unit 226 calculates a reference clothing amount Cb based on the above-described equation (3) (S261). Thereafter, it is determined whether or not the set temperature has been changed by the user (S262). When the set temperature has not been changed by the user (No in S262), the reference clothing amount Cb is estimated as the clothing amount Cl (Cl = Cb) (S263).

  On the other hand, if the set temperature has been changed by the user (Yes in S262), the reverse calculation amount Ci is calculated based on the user set temperature Tu grasped by the user set temperature grasping unit 229 and the above-described equation (4) ( S264). Thereafter, the clothing amount estimation unit 226 calculates a clothing amount difference Cd, which is a difference between the reference clothing amount Cb calculated in S261 and the reverse operation clothing amount Ci calculated in S264 (S265). And the clothing amount estimation part 226 calculates the clothing amount correction value Oc based on Formula (5) mentioned above (S266). Then, the clothing amount estimation unit 226 estimates a value obtained by adding the clothing amount correction value Oc calculated in S266 to the reference clothing amount Cb calculated in S261 as the clothing amount Cl (Cl = Cb + Oc) (S267). .

  According to the air conditioning system 1 according to the present embodiment described above, the clothing amount estimation unit 226 performs this clothing amount estimation process, so that areas such as regions where clothing customs are different and whether or not there is a duty to wear clothing, etc. Since the clothing amount correction value Oc corresponding to the characteristics of the indoor environment is calculated and used, the clothing amount Cl can be estimated with high accuracy. That is, the clothing amount estimation unit 226 performs this clothing amount estimation process, so that the error of the clothing amount Cl due to the difference in the clothing amount characteristics depending on the regional characteristics or the characteristics of the indoor environment can be automatically corrected. As a result, the PMV calculation unit 227 can calculate the PMV value with high accuracy, and the set temperature calculation unit 228 sets the temperature at which both user comfort and energy saving can be achieved.

Once the clothing amount correction value Oc is calculated, the clothing amount correction value Oc may be taken into account when calculating the reference clothing amount Cb thereafter. That is, instead of calculating the reference clothing amount Cb based on the above-described equation (3), the reference clothing amount Cb may be calculated using the following equation (3) ′.
Cb = f1 (T1) + Oo + Os + Ow + Oc (3) ′
Thereby, since the reference clothing amount Cb is calculated with high accuracy, it is considered that the user has less chance to change the set temperature via the remote controller 50. As a result, it is possible to realize an air conditioning that can achieve both user comfort and energy saving without the user's operation via the remote controller 50.

(Second aspect)
In the first aspect described above, once the clothing amount correction value Oc is calculated, the same clothing amount correction value Oc is estimated when estimating the clothing amount Cl for determining the set temperature of the indoor unit 40 attached to the same room. However, it is not particularly limited to such an embodiment. The clothing amount estimation unit 226 according to the second aspect calculates the clothing amount correction value Oc for each arbitrarily divided room temperature range, and the point of using the clothing amount correction value Oc according to the room temperature is the clothing according to the first aspect. Different from the quantity estimation unit 226.

The clothing amount estimation unit 226 according to the second aspect calculates an average value of the clothing amount difference Cd in the indoor units 40 corresponding to the same room temperature among the plurality of indoor units 40 provided in the same room. The clothing amount correction value Oc in the same room temperature section. For example, the temperature detected by the temperature sensors 411 provided in two of the four indoor units 40 installed in the first room 101 is a temperature of 25 ° C. or higher and lower than 26 ° C. When the temperature detected by the temperature sensors 411 provided in the two indoor units 40 is a temperature of 26 ° C. or higher and lower than 27 ° C., a clothing amount correction value Oc1 corresponding to a room temperature of 25 ° C. or higher and lower than 26 ° C., 26 A clothing amount correction value Oc2 corresponding to a room temperature not lower than 27 ° C. is calculated.
Oc1 = (Total value of clothing amount difference Cd in the indoor unit 40 having a temperature detected by the temperature sensor 411 of 25 ° C. or more and less than 26 ° C./2 of the indoor units 40 attached to the first room 101)
Oc2 = (Total value of clothing amount difference Cd in the indoor unit 40 having a temperature detected by the temperature sensor 411 of 26 ° C. or higher and lower than 27 ° C. of the indoor unit 40 attached to the first room 101/2)

  Then, the clothing amount estimation unit 226 calculates the clothing amount Cl of the indoor unit 40 whose temperature detected by the temperature sensor 411 is 25 ° C. or more and less than 26 ° C. among the indoor units 40 attached to the first room 101. A value obtained by adding the clothing amount correction value Oc1 to the reference clothing amount Cb is estimated (Cl = Cb + Oc1). Similarly, among the indoor units 40 attached to the first room 101, the clothing amount Cl of the indoor unit 40 whose temperature detected by the temperature sensor 411 is 26 ° C. or higher and lower than 27 ° C. is applied to the reference clothing amount Cb. A value obtained by adding the amount correction value Oc2 is estimated (Cl = Cb + Oc2).

  In this way, by calculating the clothing amount correction value Oc for each room temperature range that is arbitrarily divided, the characteristics of the clothing amount that varies depending on the room temperature can be taken into account, so that the clothing amount Cl can be estimated with higher accuracy and more comfortable. The accuracy of sex evaluation is improved. Therefore, the energy saving effect can be expanded.

(Third aspect)
The clothing amount estimation unit 226 according to the third aspect stores an arbitrarily divided clothing amount correction value Oc for each outside air temperature range, and uses the clothing amount correction value Oc according to the outside air temperature to calculate the clothing amount Cl. The point to be estimated is different from the clothing amount estimation unit 226 according to the first aspect.
That is, the clothing amount estimation unit 226 according to the third aspect associates the clothing amount correction value Oc with the outside air temperature when the clothing amount correction value Oc is calculated (the outside air temperature range may be arbitrarily divided). Remember. Then, when calculating the reference clothing amount Cb using the above-described equation (3) ′, the clothing amount estimation unit 226 uses the clothing amount correction value Oc corresponding to the outside air temperature at that time.

  Thus, by calculating and storing the clothing amount correction value Oc for each outside air temperature (an outside air temperature range that is arbitrarily divided), the characteristics of the clothing amount that varies depending on the outside air temperature can be considered. It is possible to estimate with higher accuracy, and the accuracy of comfort evaluation is further improved. Therefore, the energy saving effect can be expanded.

(Fourth aspect)
The clothing amount estimation unit 226 according to the fourth aspect stores a clothing amount correction value Oc for each date or season, and estimates the clothing amount Cl using the clothing amount correction value Oc corresponding to the date or season. Is different from the clothing amount estimation unit 226 according to the first aspect.
That is, the clothing amount estimation unit 226 according to the fourth aspect stores the clothing amount correction value Oc in association with the date or season when the clothing amount correction value Oc is calculated. Then, the clothing amount estimation unit 226 uses the clothing amount correction value Oc corresponding to the date or season at the time of calculating the reference clothing amount Cb using the above-described equation (3) ′.

  In this way, by calculating and storing the clothing amount correction value Oc for each date or season, it is possible to consider the characteristics of the clothing amount that varies depending on the date or season, so that the clothing amount Cl can be estimated with higher accuracy. This improves the accuracy of comfort evaluation. Therefore, the energy saving effect can be expanded.

(5th aspect)
The clothing amount estimation unit 226 according to the fifth aspect stores a clothing amount correction value Oc for each weather such as fine weather, cloudy weather, and rainy weather, and uses the clothing amount correction value Oc according to the weather to determine the clothing amount Cl. The point to be estimated is different from the clothing amount estimation unit 226 according to the first aspect.
That is, the clothing amount estimation unit 226 according to the fifth aspect stores the clothing amount correction value Oc in association with the weather when the clothing amount correction value Oc is calculated. Then, when calculating the reference clothing amount Cb using the above-described equation (3) ′, the clothing amount estimating unit 226 uses the clothing amount correction value Oc corresponding to the weather at that time.

  In this way, by calculating and storing the clothing amount correction value Oc for each weather, it is possible to consider the characteristics of the clothing amount that varies depending on the weather, so that the clothing amount Cl can be estimated with higher accuracy and more comfortable. The accuracy of sex evaluation is improved. Therefore, the energy saving effect can be expanded.

In the first embodiment and the second embodiment described above, PMV is used as the indoor comfort index, but the comfort index is not limited to PMV. For example, other comfort indices such as SET ^* may be used.
In the first embodiment and the second embodiment described above, the control unit 202 of the centralized controller 20 that controls the plurality of air conditioners 10 determines that the temperature of the air-conditioning target space is the clothing amount Cl or the average radiation temperature Tr. It functions as a control means for controlling the operation of the indoor unit 40 as an example of an air-conditioning apparatus so that the temperature is set based on a comfort index calculated from a plurality of parameters including. However, the outdoor unit control unit 302 of the outdoor unit 30 and the indoor unit control unit 414 of the indoor unit 40 may perform this function.

[program]
The processing performed by the centralized controller 20 according to the first and second embodiments described above is prepared as a program such as application software, for example.
Therefore, the processing performed by the centralized controller 20 determines the reference value in the computer according to a predetermined procedure, and if the user existing in the air conditioning target space has not changed the temperature setting of the air conditioning target space, A function that estimates the reference value as the average radiation temperature Tr, and when the user changes the temperature setting, estimates a value obtained by correcting the reference value based on the temperature set by the user as the average radiation temperature Tr And a room that harmonizes the air in the air-conditioning target space so that the temperature of the air-conditioning target space becomes a temperature set based on a comfort index calculated from a plurality of parameters including the estimated average radiation temperature Tr It can also be understood as a program for realizing the function of controlling the operation of the machine 40.

  The program for realizing the first and second embodiments can be provided not only by communication means but also by storing in a recording medium such as a CD-ROM.

DESCRIPTION OF SYMBOLS 1 ... Air conditioning system, 10 ... Air conditioner, 20 ... Central controller, 21 ... Measurement parameter receiving part, 22 ... Abnormality judgment part, 23 ... Determination result output part, 30 ... Outdoor unit, 31 ... Compressor, 33 ... Outdoor heat Exchanger, 34 ... outdoor expansion valve, 37 ... control device, 371 ... inlet air temperature receiving unit, 372 ... initial inlet air temperature storage unit, 373 ... reference change amount storage unit, 374 ... filter clogging determination unit, 375 ... determination result Transmitting unit, 40 ... indoor unit, 41 ... indoor heat exchanger, 421 ... turbo fan, 44 ... inlet, 47 ... filter, 410 ... inlet air temperature sensor, 70 ... ventilator, 720 ... heat exchanger, 730 ... temperature Sensor, 740 ... Humidity sensor, 760 ... Damper, 80 ... Ventilation control unit, 90 ... Control unit, 91 ... Schedule operation management unit, 92, 94 ... Ventilation control unit, 93 ... Air conditioning control unit

Claims (25)

Acquires operation state information indicating the operation state of the control device including the frequency of the compressor of the air conditioner or the rotation speed of the outdoor fan of the air conditioner when the air conditioner is performing the cooling operation or the heating operation. Acquisition means;
An abnormality detection apparatus comprising: output means for outputting information indicating that an abnormality has occurred in the air conditioner when the operation state information satisfies a predetermined condition.   The acquisition means acquires the operation state information including a frequency of a compressor of the air conditioner, a rotation speed of an outdoor fan of the air conditioner, and an opening degree of an expansion valve of the air conditioner. The abnormality detection device according to claim 1.   The output means is a condition that, when the air conditioner is performing a cooling operation, the operating state information is the predetermined condition, and the frequency and the number of rotations are decreased and the opening is increased. When the air conditioner is performing a heating operation when the above condition is satisfied, the operating state information includes the condition that the frequency, the rotation speed, and the opening degree are increased as the predetermined condition. The abnormality detection device according to claim 2, wherein when the condition is satisfied, the air conditioner outputs information indicating that a refrigerant leak has occurred as the abnormality.   When the air conditioner is performing a cooling operation or a heating operation, the output means increases the frequency and the number of rotations as the predetermined condition as the operating state information. The information which shows that the contamination of the outdoor heat exchanger is generated as the abnormality in the air conditioner when the condition that the degree is reduced is satisfied is output to the air conditioner. The abnormality detection device described.   When the air conditioner is performing a cooling operation or a heating operation, the output means reduces the frequency, the number of rotations, and the opening degree as the operation condition information is the predetermined condition. 3. The abnormality detection device according to claim 2, wherein when the condition that the air conditioner is satisfied is satisfied, information indicating that the indoor filter is contaminated as the abnormality is output to the air conditioner. . An air conditioner that harmonizes the air in the air-conditioned space;
An abnormality detection device for detecting an abnormality of the air conditioner,
The air conditioner is
Control equipment including a compressor and an outdoor fan;
Transmission means for transmitting operation state information indicating the operation state of the control device including the frequency of the compressor and the rotation speed of the outdoor fan when the own apparatus is performing cooling operation or heating operation,
The abnormality detection device is:
Receiving means for receiving the operating state information transmitted by the transmitting means;
An air conditioning system comprising: output means for outputting information indicating that an abnormality has occurred in the air conditioner when the operation state information satisfies a predetermined condition. The air conditioner is controlled by a first microcomputer,
The air conditioning system according to claim 6, wherein the abnormality detection device is controlled by a second microcomputer having a memory capacity larger than that of the first microcomputer. Acquires operation state information indicating the operation state of the control device including the frequency of the compressor of the air conditioner or the rotation speed of the outdoor fan of the air conditioner when the air conditioner is performing the cooling operation or the heating operation. Steps,
Outputting an information indicating that an abnormality has occurred in the air conditioner when the operation state information satisfies a predetermined condition. On the computer,
Acquires operation state information indicating the operation state of the control device including the frequency of the compressor of the air conditioner or the rotation speed of the outdoor fan of the air conditioner when the air conditioner is performing the cooling operation or the heating operation. Function and
A program for realizing a function of outputting information indicating that an abnormality has occurred in the air conditioner when the operation state information satisfies a predetermined condition. Indoor units installed indoors;
An abnormality detection device for detecting an abnormality of the indoor unit,
The indoor unit is
A filter that removes dust in the air;
A heat exchanger for exchanging heat between the air passing through the filter and the refrigerant;
Measuring means for measuring the temperature of the air at a predetermined position in the direction in which the air exchanged by the heat exchanger flows due to the occurrence of a short circuit;
The abnormality detection device is:
A first temperature, which is a temperature measured by the measuring means at the start of cooling operation or heating operation, and a second temperature, which is a temperature measured by the measuring means when a certain time has elapsed after the start of cooling operation or heating operation And an acquisition means for acquiring
Output means for outputting information indicating that the filter is clogged when an amount of change from the first temperature to the second temperature satisfies a predetermined condition. An air conditioner characterized.   The predetermined position is a position upstream of a position where air passing through the filter exists in a direction in which the air subjected to heat exchange by the heat exchanger flows due to generation of a short circuit. The air conditioning apparatus according to claim 10. The indoor unit is
An intake port that is formed in a bell mouth shape and sucks air that has passed through the filter from vertically downward to vertically upward;
A fan that is installed vertically above the suction port and that sends the air sucked from the suction port in a horizontal direction;
The heat exchanger is installed so as to sandwich the fan on a horizontal plane,
The air according to claim 10, wherein the predetermined position is a position above an upper end of the suction port and between the heat exchanger and an air inlet to the fan. Harmony device. The temperature of the air at a predetermined position in the direction in which the air exchanged by the heat exchanger of the indoor unit of the air conditioner flows due to the occurrence of a short circuit, and the cooling or heating operation of the air conditioner starts. An acquisition means for acquiring a first temperature, which is a temperature measured at the time, and a second temperature, which is a temperature measured when a certain time has elapsed after the start of the cooling operation or heating operation of the air conditioner;
Output means for outputting information indicating that the filter of the indoor unit is clogged when an amount of change from the first temperature to the second temperature satisfies a predetermined condition; An abnormality detection device characterized by that.   The output means is clogged when the amount of change from the first temperature to the second temperature satisfies a condition that a predetermined threshold is exceeded as the predetermined condition. The abnormality detection device according to claim 13, wherein information indicating that the operation is performed is output. The temperature of the air at a predetermined position in the direction in which the air exchanged by the heat exchanger of the indoor unit of the air conditioner flows due to the occurrence of a short circuit, and the cooling or heating operation of the air conditioner starts. Obtaining a first temperature which is a temperature measured at the time and a second temperature which is a temperature measured when a certain time has elapsed after the start of the cooling operation or heating operation of the air conditioner;
Outputting information indicating that the filter of the indoor unit is clogged when a change amount from the first temperature to the second temperature satisfies a predetermined condition. An abnormality detection method characterized by On the computer,
The temperature of the air at a predetermined position in the direction in which the air exchanged by the heat exchanger of the indoor unit of the air conditioner flows due to the occurrence of a short circuit, and the cooling or heating operation of the air conditioner starts. A function of acquiring a first temperature, which is a temperature measured at times, and a second temperature, which is a temperature measured when a certain period of time has elapsed after the start of cooling or heating operation of the air conditioner;
A function of outputting information indicating that the filter of the indoor unit is clogged when a change amount from the first temperature to the second temperature satisfies a predetermined condition; Program for. A first control means for performing a follow-up control of a set temperature when the air conditioner performs a cooling operation or a heating operation based on an index indicating comfort of indoor air;
The ventilator performs a ventilation operation based on a comparison result between an index indicating the comfort of indoor air as a result of performing the follow-up control of the set temperature by the first control means and an index indicating the comfort of the outside air. And a second control means for controlling the presence or absence of heat exchange in the ventilation device.   The second control means is configured to cause the air conditioner to perform the cooling operation based on a comparison result between an index indicating the comfort of room air before the start of the cooling operation by the air conditioner and an index indicating the comfort of the outside air. The air-conditioning control device according to claim 17 which controls the presence or absence of ventilation operation by said ventilation device before starting.   The second control means includes an index indicating the comfort of room air when the ventilation device performs ventilation operation while performing heat exchange, and the ventilation device performs ventilation operation without performing heat exchange. The air conditioning control device according to claim 17, wherein the presence or absence of heat exchange in the ventilation device when the ventilation device performs a ventilation operation is controlled based on a comparison result with an index indicating comfort of indoor air. An initial indoor relative humidity estimation means for estimating an initial indoor relative humidity which is a relative humidity in the room in an initial state;
A dehumidified water vapor amount estimating means for estimating a dehumidified water vapor amount which is a water vapor amount dehumidified indoors from the initial state to the present time by cooling;
A ventilation water vapor amount estimating means for estimating a ventilation water vapor amount that is an amount of water vapor flowing into and out of the room by ventilation from the initial state to the present time;
Based on the initial indoor relative humidity, the dehumidified water vapor amount, and the ventilation water vapor amount, a current indoor relative humidity estimation means for estimating a current indoor relative humidity that is a relative humidity at the present time;
The air conditioning control device according to claim 17, further comprising comfort index calculation means for calculating an index indicating comfort of the room air based on the current indoor relative humidity. A relationship storage means for storing, for each of a plurality of temperature categories, a weather / room temperature-clothing amount relationship, which is a relationship between the weather or room temperature and the amount of clothing;
Temperature acquisition means for acquiring the temperature;
A relationship for acquiring a weather / room temperature-clothing amount relationship of a corresponding temperature category from among a plurality of weather / room temperature-clothing amount relationships stored in the relationship storage unit based on the temperature acquired by the temperature acquiring unit. Acquisition means;
Weather / room temperature acquisition means for acquiring weather or room temperature;
A weather / room temperature-clothing amount relationship acquired by the relationship acquiring unit; and a clothing amount estimating unit that estimates a clothing amount based on the weather or room temperature acquired by the weather / room temperature acquiring unit;
18. The air conditioning control according to claim 17, further comprising comfort index calculation means for calculating an index indicating comfort of the room air based on the amount of clothes estimated by the clothes amount estimation means. apparatus. Temperature acquisition means for acquiring a minimum temperature forecast value and a maximum temperature forecast value from weather forecast data;
Representative temperature calculation means for calculating a representative temperature based on the minimum temperature forecast value and the maximum temperature forecast value acquired by the temperature acquisition means;
Weather / room temperature acquisition means for acquiring weather or room temperature;
Clothing amount estimation means for estimating a clothing amount based on the representative temperature calculated by the representative temperature calculation means and the weather or room temperature acquired by the weather / room temperature acquisition means;
18. The air conditioning control according to claim 17, further comprising comfort index calculation means for calculating an index indicating comfort of the room air based on the amount of clothes estimated by the clothes amount estimation means. apparatus. When the reference value is determined according to a predetermined procedure and the user existing in the air-conditioning target space has not changed the temperature setting of the air-conditioning target space, the reference value is estimated as the average radiation temperature, and the user When the temperature setting is changed, an average radiation temperature estimating means for estimating a value obtained by correcting the reference value based on the temperature set by the user as the average radiation temperature;
18. The comfort index calculating means for calculating an index indicating comfort of the room air based on the average radiation temperature estimated by the average radiation temperature estimating means. Air conditioning control device. Based on an index indicating the comfort of room air, performing a follow-up control of a set temperature when the air conditioner performs a cooling operation or a heating operation; and
Based on the comparison result between the index indicating the indoor air comfort as a result of the follow-up control of the set temperature and the index indicating the comfort of the outside air, the heat in the ventilator when the ventilator performs the ventilation operation And a step of controlling the presence or absence of replacement. On the computer,
Based on an index indicating the comfort of indoor air, a function of performing tracking control of the set temperature when the air conditioner performs cooling operation or heating operation,
Based on the comparison result between the index indicating the indoor air comfort as a result of the follow-up control of the set temperature and the index indicating the comfort of the outside air, the heat in the ventilator when the ventilator performs the ventilation operation A program for realizing the function to control the presence or absence of exchange.

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