JP2011021881A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein simultaneous operation of an air conditioner and a ventilator consumes wasteful energy not only by ventilation simply based on outside air temperature but also by individual control of temperature and humidity, and cannot provide comfortable indoor air conditioning with efficiency. <P>SOLUTION: A target temperature or humidity is set as a fixed width zone, and when the target temperature or humidity zone or a predetermined value in the target temperature or humidity zone is reached, the operation of an air conditioning means, a ventilation means and a refrigeration cycle is switched for energy saving operation. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technology for energy-saving operation of an air conditioner, for example, actively introducing outside air into an indoor air conditioner and performing optimum operation according to the state of the outside air, health by fresh outside air, and temperature of the outside air And technology for reducing energy consumption using humidity.

  FIG. 32 shows the technology of a conventional air conditioner described in, for example, JP-A-8-145432, where 111 is an air conditioner, and 1 has an indoor unit 1 attached to the ceiling of the room 2. 3 is an indoor heat exchanger for exchanging heat between the refrigerant flowing inside the tube and the air flowing outside the tube blown by the indoor fan 5, and 100 is a ventilation fan for the ventilation fan that introduces air directly into the interior of the indoor unit 1. , 7 is a refrigerant pipe for circulating the refrigerant between the outdoor heat exchanger 25 and the indoor heat exchanger 3 housed in the outdoor unit 8, and 18 is an outside housed in the outdoor unit 8 for measuring the outdoor temperature. An air temperature sensor 19 is provided in the vicinity of a suction grille 35 for sucking in air that has circulated through the room, and measures a room air temperature that is the suction temperature, 21 is a wall surface that forms a room together with the floor surface, 34 is an indoor unit 1 A blow-out grill 110 for blowing air from the duct 110 is a duct that is opened and closed by a duct damper to ventilate the indoor unit.

  In the configuration of FIG. 32, the indoor unit 1 of the ceiling-embedded air conditioner is embedded in a ceiling or the like, and an indoor fan 5 such as a cross-flow fan and a heat exchanger 3 are attached to the interior unit 1 and face the room 2 A suction grille 35 and a blowout grille 34 are respectively opened on the upstream side and the downstream side of the indoor heat exchanger 3 of the decorative panel provided in. Circulation wind is formed in the room by the rotation of the indoor fan 5. A duct 110 provided with a ventilation fan 100 is connected to the outdoor side air passage of the indoor heat exchanger 3 so as to be able to communicate with the outdoors, and the outside air is controlled by a duct damper that opens and closes in conjunction with the on / off control of the ventilation fan. Has been introduced selectively.

  A conventional indoor unit 1 of a ceiling-embedded air conditioner has a room temperature sensor 19 for detecting the room temperature and an indoor controller incorporating a control device such as a microcomputer installed therein. The indoor controller reads the room temperature detection value detected by the room temperature sensor 19 and the room temperature setting value set in advance by a room temperature setting device such as a remote controller, and performs an operation necessary for setting the room temperature detection value to the room temperature setting value. A frequency signal is supplied to the outdoor unit 8. In the outdoor unit 8, this signal is given to an outdoor controller composed of, for example, a microprocessor, and the operation of the built-in compressor is controlled by this outdoor controller, and the refrigerant is supplied from the outdoor heat exchanger 25. It is sent to the indoor heat exchanger 3 through the pipe 7. Further, the indoor controller is operated by applying an ON signal to the ventilation fan 31 and the duct damper when the ventilation operation is selected by a remote controller or the like to introduce fresh outside air into the indoor unit 1.

  The temperature of the outside air to be introduced is measured by the outside air temperature sensor 18, and the value detected by the room temperature detection sensor 19 is corrected according to the outside air temperature detected by the outside air temperature sensor 18. Since operations such as heating and cooling of the air conditioner are performed at the detected room temperature, operation according to fluctuations in the outside air temperature can be performed by using the room temperature corrected by the outside air. This temperature correction is a corrected temperature obtained by multiplying the indoor air flow rate by the room temperature detection value and multiplying the outside air introduction amount by the outside air temperature detection value and dividing the sum by the total air volume.

  On the other hand, a technique as disclosed in Japanese Patent Application Laid-Open No. 60-232445 is known as a conventional technique for air conditioning by measuring the temperature and humidity of the outside air and the temperature and humidity of the room. In this case, an air conditioner and a ventilation fan are provided separately, and it is first determined whether the room temperature is higher than a set value, that is, it is determined whether room temperature control is necessary, and the air conditioner is cooled. However, when the indoor temperature is higher than the set value, the dehumidifying operation is performed by the air conditioner, or the ventilation fan is operated without operating the air conditioner if the indoor absolute humidity is higher than the outside air humidity. The absolute humidity is obtained by converting the relative humidity from the input humidity sensor together with the detected temperature on the air diagram.

JP-A-8-145432 Japanese Patent Laid-Open No. 60-232445

  However, when performing air conditioning, for example, heating and humidification, a process for sensible heat for increasing only the temperature and a process for latent heat for increasing only the humidity are simultaneously performed. As for this, for example, the above-mentioned literature published on April 20, 1987 from Ref. Kenken, Refrigeration and Air Conditioning 17th Edition, page 210, shows the state before and after heating and humidification on a diagram. Are described with sensible heat latent heat. Therefore, when the introduction control of ventilation is performed only with the air temperature, if the outside air temperature is lower than the room temperature but the outside air humidity is lower than the room humidity, the indoor humidity will rise and the humidity will be lowered. The refrigeration cycle causes a problem that wasteful work is performed in the air conditioner in an attempt to reduce the water vapor component in the room. Fork temperature and humidity are detected and the air conditioner and ventilation fan are individually controlled according to the detected value.In other words, the temperature is adjusted by the air conditioner by comparing the indoor temperature with the set value, and the humidity is adjusted between the outside and inside. In comparison, performing only humidity control with a ventilation fan has a problem in that the intake of fresh outside air is significantly restricted and the energy of the outside air cannot be effectively utilized, causing the air conditioner to perform a wasteful operation. Further, if the air volume of the ventilation fan is fixed or the operation is performed only by comparison with the absolute humidity, there is a problem that wasteful work is performed in the same manner as described above for the operation of the refrigeration cycle. Furthermore, as in the conventional control, the control of following individual numbers of the resulting temperature and humidity is limited to those for which the equipment used is specified, and the control of other equipment that adjusts other types of cooling, heating, heating, humidification and dehumidification etc. It has nothing to do with it and cannot take into account the effects of other equipment with various characteristics, and it is not possible to air-condition many rooms at the same time, and to improve the air quality considering energy efficiency. There was a problem.

  The present invention has been made to solve the above-described problems, and performs comfortable air conditioning while introducing fresh outside air by ventilation. The present invention also relates to an apparatus and method for improving air quality in view of energy efficiency. Furthermore, the present invention relates to a simple control method for integrally controlling temperature and humidity.

  The present invention provides a step of obtaining the enthalpy of the outside air and the enthalpy of the air sucked into the air conditioner from the room and comparing both enthalpies, and if the enthalpy of the outside air is lower than the enthalpy of the air sucked from the room into the air conditioner, the ventilation means. And introducing the outside air into the room and operating the refrigeration cycle under predetermined conditions.

  The present invention relates to a step of obtaining an enthalpy of air circulating indoors and an enthalpy of air sucked into the air conditioner from the room to obtain an indoor load from both enthalpies, a target value of the indoor load, the temperature and humidity of the indoor air, and the air A step of obtaining the temperature and humidity of the air circulating in the target room from the temperature and humidity of the air sucked into the harmony device from the room, and a step of introducing outside air into the room by the ventilation means.

  The present invention includes a step of detecting the temperature and humidity of an air conditioner that has an air intake port in the room and sucks room air from the air intake port by a blower to perform air conditioning, and an air outlet port of the air conditioner Detecting the temperature and humidity of the air that is blown out and circulated into the room, detecting the temperature and humidity of the outside air that introduces the outside air from the outside into the room, and setting the temperature and humidity that are target values of the room air And setting a target value for the temperature and humidity of the air mixed with the indoor air and the outside air directly sucked into the indoor heat exchanger in order to achieve the target value of the indoor air and reduce the energy of the refrigeration cycle; , With.

  The present invention includes a step of detecting the temperature and humidity of an air conditioner that has an air intake port in the room and sucks room air from the air intake port by a blower to perform air conditioning, and an air outlet port of the air conditioner Detecting the temperature, humidity, and air volume of the air that is blown out and circulated into the room, detecting the temperature, humidity, and air volume of the outside air that introduces the outside air from the outside into the room, and the temperature that is the target value of the room air; A step of setting the humidity, and a step of setting a target value of the temperature and humidity of the air directly blown from the indoor heat exchanger in order to achieve the target value of the indoor air and reduce the energy of the refrigeration cycle. It is a thing.

  This invention has a suction port and a blowout port in the room, sucks room air from the suction port by the rotation of the blower and blows it out from the blowout port, and changes the temperature and humidity in the room according to the capacity of the heat exchanger. An air conditioner that performs an operation such as heating, and an air conditioner that is connected to the air conditioner and adjusts the rotation of the blower and the capacity of the heat exchanger so that the room temperature and humidity become at least one of the target values of temperature and humidity. The target value setting means that is set to approach, and the target value that is set by the target value setting means is a zone composed of a plurality of bands, and the zone width from the plurality of bands of the target value according to the operating state of the air conditioning means Can be selected.

  The air conditioning method of the present invention can provide an air conditioning method with less energy by a simple method. In addition, an effective energy-saving operation can be performed using the outside air, and an air conditioning method that is convenient and does not use wasteful energy can be obtained. In addition, the air conditioning apparatus of the present invention makes it possible to select a zone having a plurality of bands as the target value and select a zone width from the plurality of bands of the target value, so that comfortable indoor air conditioning can be obtained.

It is a whole lineblock diagram showing the air harmony device by Embodiment 1 of the present invention. It is a refrigerant circuit diagram which shows the refrigerating cycle concerning Embodiment 1 of this invention. It is explanatory drawing which shows the general wet air diagram of this invention. It is a whole lineblock diagram showing the air harmony device by Embodiment 1 of the present invention. It is explanatory drawing which shows the flow of the indoor air concerning Embodiment 1 of this invention. It is a block diagram which shows the flow of control concerning Embodiment 1 of this invention. It is explanatory drawing which shows the change of an air state by the humid air line figure concerning Embodiment 1 of this invention. It is explanatory drawing related to Embodiment 1 of this invention, and zoning of the external air utilization method by the external air state on a wet air diagram. It is a flowchart which concerns on Embodiment 1 of this invention, and shows the procedure of the zoning process of the external air utilization method by an external air state. It is a flowchart which shows the process sequence in case the external air state concerning Embodiment 1 of this invention is a zone (1). It is a flowchart which shows the process sequence in case the external air state concerning Embodiment 1 of this invention is a zone (2). It is explanatory drawing explaining the control vector on a wet air diagram in connection with Embodiment 1 of this invention when an external air state is a zone (2). It is explanatory drawing explaining the control vector on a wet air diagram in connection with Embodiment 1 of this invention, when an external air state is a zone (2) and using a heater. It is a flowchart which shows the process sequence in case the external air state concerning Embodiment 1 of this invention is a zone (3). It is explanatory drawing explaining the control vector on a wet air diagram in connection with Embodiment 1 of this invention when an external air state is a zone (3). It is explanatory drawing explaining the control vector on a wet air diagram in connection with Embodiment 1 of this invention when an external air state is a zone (3). It is explanatory drawing explaining the control vector on a wet air diagram in connection with Embodiment 1 of this invention, when an external air state is a zone (3) and using a heater. It is outside temperature humidity distribution explanatory drawing in Embodiment 1 of this invention. It is explanatory drawing which shows the structure of the indoor unit vicinity concerning the air conditioning apparatus by Embodiment 2 of this invention. It is explanatory drawing which shows the flow of the indoor air concerning Embodiment 2 of this invention. It is explanatory drawing which concerns on Embodiment 2 of this invention and shows the change of an air state with a wet air diagram. It is explanatory drawing which concerns on Embodiment 2 of this invention and shows the change of an air state with a wet air diagram. It is explanatory drawing which concerns on Embodiment 2 of this invention and shows the change of an air state with a wet air diagram. It is explanatory drawing which concerns on Embodiment 2 of this invention and shows the change of an air state with a wet air diagram. It is explanatory drawing which shows the structure of the indoor unit vicinity concerning the air conditioning apparatus by Embodiment 2 of this invention. It is explanatory drawing which shows the structure of the indoor unit vicinity concerning the air conditioning apparatus by Embodiment 2 of this invention. It is explanatory drawing which shows the change of an air state by the wet air diagram regarding the air conditioning apparatus by Embodiment 2 of this invention. It is a characteristic view with respect to the indoor heat exchanger temperature concerning the air conditioning apparatus by Embodiment 2 of this invention. It is explanatory drawing which shows the change of an air state by the wet air diagram regarding the air conditioning apparatus by Embodiment 2 of this invention. It is explanatory drawing which shows the structure of the indoor unit vicinity concerning the air conditioning apparatus by Embodiment 2 of this invention. It is explanatory drawing which shows the indoor arrangement | positioning concerning Embodiment 2 of this invention. It is a block diagram which shows the conventional air conditioning apparatus.

Embodiment 1 FIG.
Hereinafter, the air conditioning apparatus and the air conditioning method according to Embodiment 1 of the present invention will be described. FIG. 1 is an overall configuration diagram showing an air-conditioning apparatus according to Embodiment 1 of the present invention, and FIG. 2 is an example of a configuration of an existing energy-efficient vapor compression refrigeration cycle for obtaining cold energy or thermal energy. It is a refrigerant circuit figure shown. The present invention is an air conditioner that cools or heats indoor air by adjusting the temperature or humidity of the indoor air so as to approach the target temperature and humidity, and introduces fresh outdoor air. Air conditioning is performed so that a comfortable indoor space can be obtained effectively. In particular, in the operation and control of the air conditioner when actively using outside air, the air humidity is considered together with the air temperature. The basis for controlling air temperature and air humidity in relation to each other is a generally well-known wet air diagram. Hereinafter, the wet air diagram will be briefly described. FIG. 3 is a diagram showing the gist of the wet air diagram described on page 199 of the literature (“Refrigeration and Air Conditioning”, 17th edition, April 20, 1987, published by Yokendo). The humid air diagram is a diagram showing the state of humid air, which is general air. The enthalpy i and the absolute humidity x of the humid air are taken on the oblique axis, and related data such as temperature is summarized as the atmospheric pressure is constant at 760 mmHg Is a thing. If the dry bulb temperature is constant, i and x can be expressed by a linear relationship, and the isothermal line (t line) is a straight line. The angle formed by the isenthalpy line (i-line) and the x-ray is determined so that the line of t = 0 ° C. is orthogonal to the x-ray by appropriately selecting the memory of i and x. The relationship between absolute humidity and relative humidity and the relationship between sensible heat and latent heat are also described. The horizontal axis represents temperature, and the vertical axis has a relationship that is substantially orthogonal to the absolute humidity. Curve H is called a saturation line and shows the absolute humidity and temperature when the relative humidity is 100%. It can be seen that in the region to the right of the saturation line, the water vapor is in the state of superheated steam, and when the temperature of the air decreases and the superheated steam is cooled, condensation reaches the saturation line. In this way, the wet air diagram makes it easy to know the change in the state of the humid air. Based on this, the outside air is positively introduced into the room from the actually detected outside air condition and the room air condition. Use it effectively for air conditioning.

  In FIG. 1, 1 is an indoor unit of an air conditioner attached to a wall surface of a room, and 2 is a room to be air-conditioned, which will be referred to as a room below. Further, 3 is an indoor heat exchanger, 4 is a heating means, 5 is an indoor fan, and 6 is an outside air introduction means for introducing outside air into the indoor unit 1, for example, indoors. In addition, a fan 31 for sucking outside air and a damper 67 as an outside air inlet opening / closing mechanism are provided. The indoor unit 1 includes an indoor heat exchanger 3, a heating means 4, an indoor fan 5, and an outside air introducing means 6. The heating means 4 is, for example, a heater in the present embodiment, and is disposed in an air flow path between the outlet of the indoor heat exchanger 3 and the inlet of the indoor fan 5 as shown in FIG. When the temperature of the air heat-exchanged by the indoor heat exchanger 3 is too low by the heater 4 provided in the air flow path on the downstream side of the indoor heat exchanger 3, the air is heated. The outside air introduction means 6 opens and closes the damper 67 at predetermined time intervals, electrically adjusts the opening degree of the damper 67 stepwise or continuously, or changes the rotational speed of the fan 31. By changing the fan speed, the outside air introduction amount can be variably adjusted and controlled.

  In addition, 7 is a refrigerant pipe, 8 is an outdoor unit, and cold heat or hot heat obtained by the outdoor unit 8 is transported to the indoor heat exchanger 3 through the refrigerant pipe 7. Here, for example, the refrigerant pipe 7, the outdoor unit 8, and the indoor heat exchanger 3 are configured by a vapor compression refrigeration cycle.

  As shown in FIG. 2, the outdoor unit 8 stores a compressor 22, a four-way valve 23 as a flow path switching unit, an outdoor heat exchanger 25, an outdoor fan 41, an expansion valve 26 as a decompression unit, and the like. The unit 8 and the indoor heat exchanger 3 are connected by a refrigerant pipe 7. As the refrigerant, for example, R22 which is an HCFC refrigerant is circulated in the refrigerant pipe. Hereinafter, the refrigerant circulation operation when the indoor heat exchanger 3 performs indoor cooling in this vapor compression refrigeration cycle will be described. When the room is cooled, the outdoor heat exchanger 25 is operated as a condenser and the indoor heat exchanger 3 is operated as an evaporator, and the four-way valve 23 is connected as shown by a solid line. The high-pressure gas refrigerant compressed by the compressor 22 circulates from the discharge port of the compressor 71 to the outdoor heat exchanger 25 through the four-way valve 23 and dissipates heat to the outside air blown by the outdoor fan 41 here. The refrigerant condenses and becomes high-pressure liquid refrigerant and flows out of the outdoor heat exchanger 25. Thereafter, the refrigerant flows into the expansion valve 26 and is adiabatically expanded to become a low-pressure two-phase refrigerant. Further, the low-pressure two-phase refrigerant circulates through the refrigerant pipe 7 and flows to the indoor heat exchanger 3, where it cools the room by exchanging heat with room air when the heat is collected and evaporated. The refrigerant flows out from the indoor heat exchanger 3 as a low-pressure gas refrigerant, then flows through the refrigerant pipe 7 to the outdoor unit 8, and returns to the suction port of the compressor 22 through the four-way valve 23. With such an operation, cold heat is obtained in the indoor heat exchanger 3. The temperature of the indoor air and the amount of humidity change are determined by the evaporating temperature of the refrigerant in the indoor heat exchanger 3 and the temperature and humidity of the indoor air. The evaporation temperature has an acceptable temperature tolerance. In general, in a refrigeration cycle for performing air conditioning, the lower limit of the evaporation temperature is set to about 10 ° C. for heat resistance of each device and countermeasures against dew, and a reliable operation is performed above this temperature.

  Moreover, the refrigerant | coolant circulation operation | movement at the time of an operation | movement in the case of heating an indoor with the indoor heat exchanger 3 is demonstrated. When the room is heated, the outdoor heat exchanger 25 is operated as an evaporator and the indoor heat exchanger 3 is operated as a condenser, and the four-way valve 23 is connected as indicated by a dotted line by switching the refrigerant circuit in the cooling operation. The high-pressure gas refrigerant compressed by the compressor 22 circulates from the discharge port of the compressor 22 through the refrigerant pipe 7 through the four-way valve 23 to the indoor heat exchanger 3 of the indoor unit 1 where heat is dissipated and condensed. When heating, the room is heated by exchanging heat with room air. The refrigerant flows out from the indoor heat exchanger 3 as high-pressure liquid refrigerant, is adiabatically expanded by the expansion valve 26 of the outdoor unit 8, becomes low-pressure two-phase refrigerant, and flows into the outdoor heat exchanger 25. Further, the refrigerant collects heat from the outdoor air blown by the outdoor fan 41 in the outdoor heat exchanger 25 and evaporates to flow out as a low-pressure gas refrigerant, and then returns to the suction port of the compressor 22 through the four-way valve 23. With such an operation, warm heat is obtained in the indoor heat exchanger 3.

  Further, the air conditioner shown in FIG. 1 is provided with means for detecting the air state of the outside air and the room air. Reference numeral 9 denotes indoor air temperature detecting means which is a suction temperature detecting means, and reference numeral 10 denotes indoor air humidity detecting means which is a suction humidity detecting means, which are provided, for example, at a room air intake port in the indoor unit 1. The indoor air temperature detecting means 9 detects the temperature of the return air that is the indoor air taken into the indoor unit 1 from the room 2 and the humidity of the return air that is the indoor air taken into the indoor unit 1 from the indoor 2 is the room air. It is detected by the humidity detection means 10. Reference numeral 11 denotes an outside air temperature detection means, and reference numeral 12 denotes an outside air humidity detection means. The outside air temperature detection means is provided, for example, in the vicinity of the intake port to the outside air introduction means 6 outside the room. The outside air temperature detection means 11 is the temperature of the outside air taken into the indoor unit 1. And the humidity of the outside air taken into the indoor unit 1 is detected by the outside air humidity detecting means 12. 13 is a blown air temperature detecting means for detecting the temperature of the air blown out from the air conditioner and circulated in the room, and 14 is a blown air humidity detecting means for detecting the humidity of the air circulated in the room. It is provided at the air outlet to the room, and the temperature of the air blown from the indoor unit 1 to the room 2 is detected by the blown air temperature detecting means 13 and blown from the indoor unit 1 to the room 2 by the blown air humidity detecting means 14. Detect the humidity of the air. The indoor heat exchanger pipe temperature detecting means 18 provided in the refrigerant pipe of the indoor heat exchanger 3 measures the indoor heat exchanger temperature, that is, the refrigerant evaporation temperature. Reference numeral 32 denotes an electronic box which is an indoor control device provided in the indoor unit 1. For example, one or a plurality of microprocessors are stored, and an indoor air-conditioning load detection means, an operation setting means, an outside air amount control means, and an operation operation are stored. The control means operates. This operation will be described in detail later.

FIG. 4 is a diagram for explaining the relationship between the refrigerant flow and the air flow in the system system according to one embodiment of the present invention. 1 is an indoor unit of an air conditioner that is attached to the wall surface 21 of the room 2 and performs air conditioning. The indoor heat exchanger 3, the heater 4 which is a heating means, and the indoor fan 5 are incorporated. Reference numeral 32 denotes an indoor control device that performs information transmission and the like with the outdoor control device 33 as well as start / stop operation, temperature adjustment, change of set values, and the like according to commands from a remote control device (not shown). 34 is a blow-out grill, 35 is a suction grille, and 39 is an indoor filter. Reference numeral 6 denotes outside air introduction means for taking in outside air from an opening penetrating the wall surface 21, and is constituted by a ventilation fan 31, an outdoor filter 40, and a shutter 15. 8 is an outdoor unit connected to the indoor heat exchanger 3 by the refrigerant pipe 7, and includes a compressor 22, a four-way valve 23, an outdoor heat exchanger 25, an expansion valve 26, an accumulator 24, and an outdoor fan 41 constituting the refrigeration cycle. Built in. A control device 33 adjusts the physical state of the refrigerant 16 flowing in the refrigerant pipe 7 by combining the rotational speed of the compressor 2, the switching of the four-way valve 23, the rotational speed of the outdoor fan 41, the opening degree adjustment of the expansion valve 26, and the like. It is. Reference numeral 9 is an inlet temperature detecting means, 10 is an inlet humidity detecting means, 11 is an outside air temperature detecting means, 12 is an outside air humidity detecting means, 13 is an outlet temperature detecting means, and 14 is an outlet humidity detecting means.

  In this configuration, fresh outside air amount x * Vo that is outside air from outside the room is taken into the intake side of the indoor unit 1 by the ventilation fan 31 of the outside air introduction means 6 that is a ventilation fan. This outdoor air volume x * Vo and the indoor return air volume VR of return air, which is returned air sucked into the suction grille 35 by the indoor fan 5 of the indoor unit 1 through the room, is the air sucked into the indoor unit 1. Is the amount. The sucked air is cooled by the indoor heat exchanger 3. That is, the refrigerant compressed by the compressor 22 of the refrigeration cycle is condensed by the outdoor heat exchanger 25 and cooled by the external air, the pressure is lowered by the expansion valve 26, and the refrigerant is evaporated by the indoor heat exchanger 3 to heat the heat exchanger. Let the tube cool. This refrigerant circulates in a refrigeration cycle that is returned to the compressor. The indoor heat exchanger, which is an evaporator, can cool the room by cooling the outside air amount x * Vo passing through the indoor heat exchanger and the indoor return air volume VR. It is also possible to heat the room by switching the four-way valve 23 provided in the refrigeration cycle. The heating means 4 is operated when necessary, such as during heating, and shows a heater by electric input. The outdoor filter 40 is a filter that treats the outside air and can remove not only dust but also harmful gases such as pollen and NOX. As a result, fresh and clean outside air can be taken in. The indoor filter 39 removes dirt from the air returning from the room, and can remove dirt generated in the room, such as dust, viruses, and the smell of cigarettes.

  In the figure, T and X symbols such as To and Xo indicate temperature and humidity as shown in the figure. However, humidity is expressed in absolute humidity. Qe is the cooling capacity of the indoor heat exchanger including cooling and dehumidification, and ET is the evaporation temperature that is the temperature of the tube of the indoor heat exchanger that is the evaporator. The temperature measurement shows a structure that directly measures with a temperature sensor, but in particular, one of the indoor temperature and the blowout temperature is directly measured, and the other is calculated from the cooling capacity and the air volume, that is, the rotation speed, etc. But of course it is good. Humidity is measured by a humidity sensor, but in this case, relative humidity is usually measured. Therefore, it is necessary to convert the absolute humidity from the measured value and temperature of the relative humidity with a microcomputer provided in the control device. In addition, the explanation is given that the temperature and humidity of the room and the blowout are measured by a sensor provided inside the indoor unit. However, the position where the role can also be played outside the indoor unit is good. Data may be taken from a thermometer.

  The target temperature T * is set as a zone. However, the zone width of the target temperature is set to a width of about ± 1 to 3 ° C as a zone in which a plurality of regions of about ± 0.3 to 0.5 ° C determined by the decomposition ability of the microcomputer to be used are continuously provided. That is, in general, in the case of a person, when the outside air temperature becomes low, it is felt that the temperature is lower even at the same temperature in the room. Alternatively, the target value is a wide zone. This is because women feel lower at the same temperature than men, and lower at the same temperature as they get older. Since there is a difference of about 3 ° C in some senses of this temperature difference, for example, the operation of the compressor, the fan, etc. is switched to the operation that immediately maintains the temperature that does not require much energy by entering the target temperature range. Thus, efficient driving can be performed while giving a comfortable feeling to various people. Or, by switching the operation of the compressor, etc. to the operation that always maintains the temperature after reaching a high temperature in the target temperature range, driving that gives comfort to the air conditioning in the home, especially where there are many women and elderly people Can be done. Switching between such temperature zones and switching the operation of the refrigeration cycle and indoor fan when the temperature zone is reached may be configured with a remote controller, or control of either or both indoors and outdoors It is stored in a microcomputer provided in the apparatus, and is switched according to the operation pattern or operation mode.

  The target humidity X * is similarly set as a zone. However, the zone width of the target humidity is a zone in which a plurality of regions divided in a range determined by the accuracy of the sensor to be used are continuous. In this example, the relative humidity is set to 50-65%. In other words, depending on the season, for example, in the rainy season when the outside air humidity is very high, it feels comfortable without making the difference from the outside extremely large, so when the target zone is reached, the dehumidification operation is stopped and the device becomes efficient. I can do it. In addition, as will be described in detail later, since the operation of controlling the temperature and humidity to the target values is integrally performed in relation to the cooling operation, if the relative humidity reaches 65%, the cooling operation does not stop. Humidity decreases. Further, the width of the humidity target band may be switched and used. For example, when drying laundry in the room or taking measures against the dew point in winter, it is natural that a lower setting can be made or the width can be made smaller. Switching the humidity target zone width or switching the operation of the refrigeration cycle or indoor fan when the humidity target bandwidth is reached is provided in other settings of the remote control or in indoor and outdoor control devices or both. The operation pattern stored in the microcomputer can be easily implemented.

  There is a humidity sensor that outputs an absolute humidity signal as a humidity sensor, but generally the relative humidity is measured. The organic polymer type humidity sensor becomes easy to ionize when the humidity of the atmosphere increases, and the mobile ion concentration increases. Therefore, by applying voltage, the movement of mobile ions is regarded as the amount of change in impedance, and the humidity is detected. A ceramic type humidity sensor captures changes in the surface state by the chemical adsorption of water molecules on the surface. When the thermistor element is a humidity sensor, the thermal conductivity of the humid air changes according to the amount of water vapor in the air, which changes the degree to which the heated thermistor is cooled and uses this to change the humidity. Measure.

FIG. 5 is an explanatory diagram showing the air flow in the vicinity of the indoor heat exchanger 3 related to the air conditioner according to the present embodiment. Here, T represents temperature [° C.], X represents absolute humidity [kg / kg ′], and V represents air volume [m ³ / h]. The outside air OA (temperature TOA, humidity XOA, air volume VOA) is introduced into the intake side of the indoor unit 1 and mixed with the return air RA (temperature TRA, humidity XRA, air volume VRA) of the intake air, which is room air, and mixed air KA It flows into the indoor heat exchanger 3 as (temperature TKA, humidity XKA, air volume VRA + VOA). Heat or cold is transported to the indoor heat exchanger 3 by the refrigerant passing through the refrigerant pipe 7 serving as a heat transport means, and heat exchange is performed when air flows around the refrigerant pipe in the indoor heat exchanger 3. The mixed intake air KA heat-exchanged with the refrigerant having the evaporation temperature ET [° C.] in the indoor heat exchanger 3 changes in at least one of its temperature and humidity, and in some cases is heated by the heater 4 or as it is. The air flows out from the indoor unit 1 into the room as air SA (temperature TSA, humidity XSA, air volume VRA + VOA). This blown air SA is sensible heat SH [kcal / h] of the indoor load while circulating through the room 2, that is, changing the temperature, and latent heat LH [kcal / h], that is, changing the absolute humidity, Upon receiving the load, the air becomes return air RA again, mixes with the outside air OA, and flows into the indoor heat exchanger 3.

  That is, FIG. 5 shows a structure in which ventilation for introducing outside air into the intake side of the indoor unit is introduced into the air conditioner, and the temperature and humidity in the air conditioner having a structure in which the indoor unit of the air conditioner and the ventilation fan are integrated are controlled to a target value. In the figure explaining the contents of the control approaching, first, the temperature is set to 26 ° C ± 1 ° C and the humidity is set to 50-65% as a target zone for the temperature and humidity sucked into the suction port which is the indoor temperature and humidity. The upper limit is set at a temperature of 26 ° C and a humidity of 65%. This setting may be made by storing a seasonal calendar in advance and switching by a timer in the control device, or by setting a remote controller. For example, the existing classification is determined by the microcomputer based on the calendar function stored in the control device and the detected outside air temperature. The constant temperature and humidity control aiming at this one point will be described. The heater 4 does not operate unless it is overcooled, and the humidity is expressed in absolute humidity by converting relative humidity. The temperature TRA and humidity XRA of return air RA from the room to the air conditioner, the temperature TOA and humidity XOA of the outside air OA, and the temperature TSA and humidity XSA of the supply air SA from the air conditioner to the room are obtained by means of detecting each temperature and humidity. . Until now, the detection of each temperature and humidity has been explained by each sensor, but indirectly from other quantities, for example, some temperatures are indirectly obtained by calculation from data such as the refrigeration cycle. However, when the data is fixed, for example, in a region where the weather due to the season is relatively constant, when using a microcomputer with a built-in seasonal calendar, one of the temperature and humidity of the outside air is the data of the season and the other. For example, if the measured humidity rises during the dry high temperature period, it is assumed that it is raining, and the temperature is 3 ° C lower than the average temperature stored in the microcomputer as the detection value. It is also possible to use the calculation method calculated by the microcomputer as the detection means.

  As shown in FIG. 5, the temperature TRA and humidity XRA of the return air RA from the room to the air conditioner, the temperature TOA and humidity XOA of the outside air OA, the temperature TKA and humidity XKA of the mixed air KA, and the supply air from the air conditioner to the room 8 data of each temperature and humidity of SA temperature TSA and humidity XSA are required, but the temperature and humidity of the outside air, that is, the temperature and humidity of the return air, the blowout, that is, the supply air to the room and the room air The temperature TKA and the relative humidity φKA of the mixed air can be obtained by calculation from the air volume VRA of the return air and the outside air volume VOA by measuring with six sensors like the detecting means for detecting the temperature and humidity of the air. On the other hand, there is a method of measuring the temperature TKA and humidity XKA of the mixed air and obtaining the temperature TOA and humidity XOA of the outside air OA from the return air volume VRA and the outside air volume VOA, but the former is preferable to the latter. In the former case, that is, when the outside air is measured, the directly detected data can be used when judging the introduction of the outside air. In the latter case, the temperature and humidity of the outside air are obtained after the outside air is once introduced and operated. In addition, there are cases where the temperature of the outside air is measured, for example, in an outdoor unit, and the detection value obtained by this outside temperature sensor is used. The supply air temperature TSA can be regarded as almost the same as the indoor heat exchanger temperature ET. Therefore, if the indoor heat exchanger temperature is measured, the measurement of the supply air temperature can be used instead, and vice versa. Further, it may be assumed that the supply air humidity XSA is 100%. In Japan, going down is better, so making this assumption can save the measurement. The humidity XRA of the intake air, that is, the return air may be omitted by setting this value at home if the target value is 40-65%. However, outside air humidity XOA is absolutely necessary in the present invention. Therefore, by storing numbers in a microcomputer or the like, the minimum required measurement sensors require four data: return air temperature TRA, outside air temperature TOA, indoor heat exchanger temperature E or supply air temperature TSA, and outside air humidity sensor φOA. To do.

  Here, the air that flows out after exchanging heat in the indoor heat exchanger 3 is referred to as outlet-side air. The blown air is air that is blown from the indoor unit 1 into the room 2 and includes, for example, a heater 4. In the case of heating with, the temperature of the outlet side air and the blown air are different. In addition, the room is not normally sealed, and excess room air naturally flows out of the room through a gap or an exhaust port of the room. In that case, since the room 2 is pressurized, it is possible to prevent inflow of odors, dust, and the like from other adjacent rooms. Further, the room 2 may be configured such that outside air is introduced and room air is mechanically discharged by a ventilation fan or the like. In that case, the balance of the indoor pressure can be maintained, and the introduction of outside air can be performed smoothly and reliably.

FIG. 6 is a diagram for explaining the control device. As shown in the block diagram of FIG. 6, the microprocessor of the electronic box 15 includes an indoor air conditioning load detection means 81, an operation setting means 82, an outside air amount control means 83, and an operation. The operation control means 84 is stored as a software program. The indoor air-conditioning load detection means 81 detects the indoor air-conditioning load QL. For example, the return air enthalpy iRA is obtained from the return air temperature TRA and the return air humidity XRA. Similarly, the blowout air temperature TSA and the blowout air humidity are obtained. The enthalpy iSA of the blown air is obtained from XSA, and the indoor air conditioning load QL (SH, LH), QL = SH + LH is detected based on Equation 1 shown below. For example, at the time of cooling, the indoor air conditioning load QL is obtained by calculation using Equation 1.
QL = (VRA + VOA) .rho. (IRA-iSA) (1)
VRA: Return air volume
VOA: Outside air volume
ρ: Density
iRA: Return air enthalpy
iSA: Enthalpy of blowing air

  The driving operation setting unit 82 detects the outside air temperature and the outside air humidity (TOA, XOA), the indoor air temperature detecting unit 9 and the indoor air humidity detecting unit 10 as the outside air state detected by the outside air temperature detecting unit 11 and the outside air humidity detecting unit 12. Return air temperature and return air humidity (TRA, XRA) as indoor air conditions, target indoor air temperature and target indoor air humidity (Tt, Xt), indoor air conditioning as target indoor air conditions set by a remote control switch etc. in the room The indoor air-conditioning load QL detected by the load detecting means 81 is input, the outside air introduction amount VOA, the air-conditioning capability Qe and the evaporation temperature ET, the heating amount W of the heater 4 as the heating means, and the indoor heat exchanger 3 as necessary. Information such as the total air volume VRA + VOA of the passing air is set. The outside air introduction amount VOA is set in consideration of, for example, the mixing ratio x: y (x + y = 1) of the return air volume VRA and the outside air volume VOA. The setting method at this time will be described in detail later based on a flowchart. Further, the evaporating temperature ET and the air conditioning capability Qe of the refrigerant flowing through the indoor heat exchanger 3 are set from the control vector on the air diagram showing the temperature and humidity changes between the intake air and the blown air.

  The outside air amount control unit 83 controls the operation of the outside air introduction unit 6 so that the outside air introduction amount VOA set by the driving operation setting unit 82 is obtained. Specifically, the outside air introduction amount can be varied by controlling the opening / closing control of the damper 67, the opening degree control, or the rotational speed of the fan 31 provided in the outside air introduction means 6 as the outside air inlet opening / closing mechanism. The outside air introduction amount is set, for example, as a ratio x: y of the supply amount of the return air RA and the outside air OA, and the outside air introduction amount VOA in the outside air introduction means 6 and the total air amount VRA + VOA from the indoor unit 1 are set to this ratio. And control. At this time, when the outside air is 100% of the total air volume, that is, when only the outside air is sucked into the indoor unit 1, for example, the fan 31 of the outside air introducing means is set to the maximum high speed operation and the indoor fan 5 is set to the low speed operation of the super-fine wind. The outside air can be taken into the room at a rate of 100%. When the outside air intake amount is 100% or less, adjusting the outside air introduction amount and the total air volume blown out from the indoor unit allows the excess indoor air to naturally flow out of the gap between the rooms, and the ratio of the outside air to the total air volume Can be controlled. The total air volume blown out from the indoor unit 1 can be controlled by changing the rotational speed of the indoor fan 5.

  The operation operation control means 84 controls the operation of the refrigeration cycle as the heat transport means so that the air conditioning capacity Qe and the evaporation temperature ET set by the operation operation setting means 82 are obtained, and a desired operation in the indoor heat exchanger 3 is achieved. The refrigerant temperature ET and the air conditioning capability Qe are obtained. Specifically, the operation of the refrigeration cycle is the rotation speed control of the indoor fan 5 on the indoor side, and the opening control of the expansion valve 75, the frequency control of the compressor 71, the rotation speed control of the outdoor fan 74, etc. on the outdoor side. is there. Further, when the set operation includes heating by the heater 4, the heater 4 is turned on / off. Expression 2 shown below is an example of a method for controlling the operation of the refrigeration cycle. From the target air conditioning capacity change amount ΔQe * of the refrigeration cycle and the target evaporation temperature change amount ΔET * of the refrigerant, the compressor frequency change amount Δfz and the indoor fan 5 Is a formula for obtaining the rotation speed change amount ΔNi. The coefficients a, b, c, and d in this equation may be obtained in advance by simulation in consideration of experimental data and theoretical values and stored as data. This control is VPM (vector pattern matching) control that is generally performed, and shows the relationship between the frequency fz of the compressor 71, the indoor fan 5 rotation speed Ni, the air conditioning capability Qe, and the evaporation temperature ET. For example, when the frequency is increased (Δfz> 0), the air conditioning capacity increases (ΔQe *> 0), and the evaporation temperature decreases (ΔET * <0). Further, for example, when the rotational speed of the indoor fan is increased during the cooling operation (ΔNi> 0), the air conditioning capability increases (ΔQe *> 0), and the evaporation temperature increases (ΔET *> 0).

  When the above description is expressed qualitatively, it is expressed by the following Expression 3, and A> 0, B> 0, C> 0, D> 0. The quantitative values of A, B, C, and D are obtained by experiments and simulations, and after obtaining the values, the values of coefficients a, b, c, and d are obtained by transforming Equation 3 as Equation 2. It is done.

  The indoor air-conditioning load detection means 81, the operation operation setting means 82, the outside air amount control means 83, and the operation operation control means 84 may all be incorporated in one microprocessor as a computer program, or may be different from each other. It may be built in the microprocessor.

  The feature of the present invention is that it detects the temperature and humidity of the outside air and room air, grasps the temperature and humidity drawn on the humid air diagram as a vector state, and sets the indoor air temperature and humidity to the target temperature and humidity. It is to control an air conditioner such as a refrigeration cycle and an indoor fan, a heater, a circulating air blower, and a ventilator so as to approach each other. For example, when the outside air can be used for indoor air conditioning, the outside air introduction means 6 actively introduces the outside air into the room.

  FIG. 7 is an explanatory diagram showing an example of a change in the air state of the room air when the room air is cooled and dehumidified by the air conditioner on the wet air diagram. FIG. 7 shows the above-described general wet air diagram, wherein the vertical axis represents absolute humidity X [kg / kg ′], and the horizontal axis represents dry bulb temperature T [° C.]. The air state is represented by one point on the wet air diagram from the temperature and humidity. Here, this air state is referred to as the temperature and humidity of the air. The outside air enthalpy is calculated from the outside air temperature and the outside air humidity detected by the outside air temperature detecting means 11 and the outside air humidity detecting means 12, and the return air is obtained from the return air temperature and the return air humidity detected by the room temperature detecting means 9 and the room humidity detecting means 10. Calculate the enthalpy. Then, the outside air enthalpy is compared with the return air enthalpy. When the outside air enthalpy is smaller than the return air enthalpy, outside air (outside temperature humidity OA) is introduced from the outside air introduction means 6. In this embodiment, whether or not to introduce outside air is determined by enthalpy and the user's ventilation request, but here is a diagram of the change in temperature and humidity of the basic indoor air when outside air is introduced 5 and will be described.

  The intake air temperature / humidity KA, which is a mixed air mixture of return air (return air temperature / humidity RA) and outside air (outside air temperature / humidity OA) introduced from the room 2 into the indoor unit 1, is the return air temperature / humidity RA and the outside air temperature / humidity. It becomes the temperature and humidity on a straight line connecting OA, and the temperature and humidity change according to the amount of outside air introduced. Return air supply amount: outside air supply amount = x: y The mixed air that has been brought into the intake air temperature and humidity KA by introducing the outside air is heat-exchanged with the refrigerant in the indoor heat exchanger 3. Cooled and dehumidified. When the evaporation temperature of the indoor heat exchanger 3 (the temperature of the refrigerant pipe measured by the indoor heat exchanger pipe temperature detecting means 68, that is, the pipe temperature) is ET, it is on a straight line connecting the intake air temperature / humidity KA and the evaporation temperature ET. Air temperature and humidity, which is air of temperature and humidity, flows out as the outlet side air of the indoor heat exchanger 3. In the present embodiment, the heater 4 is provided in the air flow path on the air outlet side of the indoor heat exchanger 3, and when the air is cooled excessively in order to dehumidify the indoor heat exchanger 3, this heater is used. 4 can warm up. The air that has passed through the heater 4 becomes blown air (blow air temperature and humidity SA) and is blown out from the indoor unit 1 into the room. Thereafter, an air-conditioning load QL (SH, LH) is added to the air blown out from the indoor unit 1, and is taken into the indoor unit 1 as return air (return air temperature / humidity RA) again. The return air temperature / humidity RA changes slightly from the initial return air temperature / humidity, and should approach the target indoor air temperature / humidity t.

  Here, in the initial operation, only the return air is sucked in without introducing outside air, and when operating at the refrigerant evaporation temperature ET, the blown air enthalpy calculated from the blown air temperature and the blown air humidity, the return air temperature, The indoor air conditioning load QL is estimated from the enthalpy of return air calculated from the return air humidity, that is, the return air enthalpy on the suction side. The change in the horizontal axis direction of the indoor load is the sensible heat load SH, and the change in the vertical axis direction is the latent heat load LH.

Finally, in order to set the return air temperature / humidity RA to the target indoor air temperature / humidity t in FIG. 7, the target blown air temperature / humidity SA * is calculated from the target indoor air temperature / humidity t and the indoor air conditioning load QL. Then, the intake air temperature / humidity KA and the target evaporation temperature ET * are determined so as to realize the target blowing temperature / humidity SA * while reducing the air conditioning capability Qe as much as possible. By determining the intake air temperature / humidity KA, the mixing ratio of the return air temperature / humidity RA taken into the indoor unit 1 from the room 2 and the outside air temperature / humidity OA is determined, and the outside air introduction amount is determined. This outside air introduction amount is controlled by the outside air introduction means 6. For example, when the outside air temperature humidity OA and the return air temperature / humidity RA are mixed to obtain the target air temperature / humidity SA * at the evaporation temperature ET *, the intake air to the indoor heat exchanger 3 is obtained. The ratio of the amount of outside air introduced to the total amount of air (corresponding to the total air volume blown indoors from the indoor unit)
| KA-RA | / | OA-RA | = y / (x + y)
= VOA / (VOA + VRA)
It is obtained with. Further, the refrigeration cycle is operated and controlled according to the evaporation temperature ET * and the air conditioning capability Qe at this time. Here, since the air conditioning capability Qe is made as small as possible, the input to the air conditioner can be minimized, resulting in energy saving.

  Here, considering the air condition before and after the indoor heat exchanger 3, while the intake air having the intake air temperature and humidity KA flows into the indoor heat exchanger 3 and flows outside the refrigerant pipe in the indoor heat exchanger 3, the refrigerant pipe Heat exchange with the refrigerant having the evaporating temperature ET * flowing in the interior flows out from the indoor heat exchanger 3 as the outlet side air temperature and humidity SA. On the wet air diagram, the air of temperature and humidity SA at a point on the straight line connecting the point of temperature and humidity KA and the point of temperature ET * on the saturation line flows out as the outlet side air of the indoor heat exchanger 3. In other words, when the intake air of temperature / humidity KA flows into the indoor heat exchanger 3 and the outlet side air of temperature / humidity SA flows out, the temperature / humidity KA is changed to temperature / humidity SA on the wet air diagram. The air conditioning capacity Qe, which is the length of the control vector, and the refrigerant at the temperature at which the straight line extending from the control vector and the saturation line intersect may be circulated in the indoor heat exchanger 3 so as to change. In the present invention, in order to easily control the operation in the indoor heat exchanger 3, the target indoor air temperature / humidity t and the target blown air temperature / humidity SA *, which is the target of the blown air, are set from the indoor air conditioning load QL. Control is performed so that the air temperature / humidity blown from the exchanger 3 approaches the target air temperature / humidity SA *.

However, there is a limit to the slope of the control vector that can be realized, and it must be within the allowable range of the sensible heat ratio (SHF) of the refrigeration cycle, and SHFmin ≦ SHF ≦ SHFmax (maximum 1). Here, the sensible heat ratio (SHF) is expressed by Equation 4, and out of the total amount of heat Q [kcal / h] (sensible heat + latent heat) used to lower the temperature of the air, it is gaseous H ₂ O. Is the ratio of the amount of heat QLH [kcal / h] (latent heat) used to condense the water into liquid H ₂ O.
SHF = (Q−QLH) / Q = sensible heat / (sensible heat + latent heat) (4)
Therefore, the operation at SHFmax is the high sensible heat operation, and the operation at SHFmin is the maximum dehumidification operation. For example, if the dehumidification amount is 0, SHF = 1 (high sensible heat operation), and if dehumidification can be performed without lowering the room temperature at all, SHF = 0 (maximum dehumidification operation). Actually, there is a limit to the dehumidifying capacity. In the wet air diagram, when the extension line of the control vector and the saturation line do not intersect, the dehumidifying capacity is exceeded and it cannot be realized. That is, when the straight line connecting the intake air temperature / humidity KA to the indoor heat exchanger 3 and the outlet-side air temperature / humidity SA is extended on the wet air diagram, the straight line does not intersect the saturation line. At this time, even if heat is exchanged with the refrigerant, air of temperature and humidity SA cannot be obtained on the outlet side of the indoor heat exchanger 3. As described above, in general, in the refrigeration cycle for air conditioning, the lower limit of the SHF is limited by setting the lower limit of the evaporation temperature to about 10 ° C. from the heat resistance of each device and countermeasures against dew. There is also.

  As described above, the air flow mixes the air volume VRA of the return air RA and the air volume VOA of the outside air OA. The humidity KA is cooled and dehumidified by the indoor heat exchanger, which is an evaporator, and becomes the temperature and humidity SA of the supply air. The temperature and humidity can be measured by the outlet temperature detecting means and the outlet humidity detecting means provided near the outlet grill 34 of the air conditioner outlet. FIG. 7 is a phenomenon explanatory diagram illustrating the state of this phenomenon on the air diagram. In FIG. 7, the temperature and humidity RA of return air, the temperature and humidity OA of outside air, and the temperature and humidity SA of supply air can be plotted on the diagram with the horizontal axis representing temperature and the vertical axis representing absolute humidity. As the axis of enthalpy i is described in the air diagram of FIG. 3, the oblique axis of enthalpy i is uniquely determined by the following relationship between temperature and absolute humidity. That is, i = 0.24 * temperature + (597.5 + 0.441 * temperature) * absolute humidity. Therefore, if the temperature and humidity are detected, the microcomputer can calculate the magnitude of the load, which is enthalpy and energy. Conversely, if the load is mainly a computer and lighting as in the computer room, the enthalpy can be calculated from the power consumption of the load using the data stored in the microcomputer to obtain the temperature. Thus, in this example where the enthalpy of the room air is larger than the enthalpy of the outside air, the outside air is introduced from the outside air introduction means 6.

  Although the enthalpy is not shown in FIG. 7, the sensible heat SH of the indoor load, that is, the temperature, and the latent heat LH, that is, the absolute humidity, are changed between the return air temperature and humidity RA and the supply air temperature and humidity SA. In other words, it is expressed as shown in the figure by the enthalpy component, which is energy, and can be obtained by calculation. In FIG. 7, the data of the air diagram is a physical quantity having a correlation, and since the data is stored as a chart or an expression, these calculations are easily performed by a control device using a microcomputer. From this state, the room temperature and humidity must be set to the target temperature and humidity t by adjusting the ventilation means, the refrigeration cycle, and the like. If the target temperature / humidity point is t, the temperature / humidity RA of the return air must be set to the target temperature / humidity t. By moving in parallel to the target, the target supply temperature and humidity SA * can be obtained.

In the air conditioner of the present invention, a basic concept of an operation method for obtaining a comfortable indoor space by actively introducing outside air and effectively using it will be described here.
The intake air temperature / humidity KA, which is a mixture of the return air temperature / humidity RA and the outside air temperature / humidity OA, is selected so that the enthalpy difference between the intake air temperature / humidity KA and the target blowout air temperature / humidity SA * is reduced.
The inclination of the control vector from the intake air temperature / humidity KA to the target blown air temperature / humidity SA * is within the allowable range of the sensible heat ratio (SHF) of the refrigeration cycle. Select one with a small enthalpy difference.
When the maximum dehumidification operation SHFmin in the refrigeration cycle does not provide sufficient dehumidification and the control vector cannot be realized, the temperature of the target blown air is lowered so that the humidity is satisfied, and the outlet side air flowing out from the indoor heat exchanger 3 is heated. To control the target air temperature and humidity SA *. That is, the refrigerant temperature of the indoor heat exchanger 3 is set so that the humidity of the target blown air becomes equal, and the outlet side air heat exchanged with the refrigerant at that temperature in the indoor heat exchanger 3 is lower than the temperature of the target blown air. In some cases, it is heated to the target blown air temperature.

  1 of the above concept. Since the enthalpy difference is set to be as small as possible, the sum of the inputs to the compressor 71, the outdoor fan 74, the indoor fan 5 and the like of the air conditioner can be minimized, and energy can be saved without performing unnecessary operations. Become. Further, in the above concept 3. In the case of using the heating means, when the air heat-exchanged by the indoor heat exchanger is heated by the heating means, the total energy amount of the heat transport capacity and the heating amount for obtaining the refrigerant temperature in the indoor heat exchanger 3 is The outside air introduction amount is set so as to decrease, and the operation control is performed for energy saving. That is, operation control is performed so that the total amount of input energy at the air conditioning capability Qe and the heater 4 is reduced.

  For this reason, it is the driving operation setting operation performed by the driving operation setting means 82 that determines whether or not the outside air can be used for indoor air conditioning, and sets the driving operation based on the determination. Each device of the air conditioner is actually operated by an operation control operation performed by the introduction amount control means 83 and the operation operation control means 84. The wet air diagram is divided into three regions according to the outside air state, and each region is processed to set the outside air introduction amount, the air conditioning capacity, and the heating amount. FIG. 8 is an explanatory diagram showing regions of each zone in the wet air diagram, and FIG. 9 is a flowchart showing a processing procedure of a zone division part of the outside air utilization method according to the outside air state. As shown in FIG. 8, there are three air diagrams regarding how to use outside air depending on the state of return air temperature / humidity RA, target blowing air temperature / humidity SA *, and outside air temperature / humidity OAx (x = 1 to 3). Divided into zones. Zone (1) is a region above the isoenthalpy line (straight line A) passing through the return air temperature and humidity RA, and is when the outside air temperature humidity OA1 is higher than the return air temperature and humidity RA. The zone (2) is a line (straight line) connecting the return air temperature / humidity RA and the target blowing temperature / humidity SA * in a region where the outside air temperature / humidity OA2 is lower than the return air temperature / humidity RA and the outside air temperature is lower than the return air temperature. B) A region on a lower temperature side. Zone (3) is an area where the outside air temperature humidity OA3 is lower than the return air temperature humidity RA, and the outside air humidity is lower than the return air humidity, and is on the lower humidity side than the line connecting RA and SA * (straight line B). is there.

  In the flowchart of FIG. 9, the return air temperature / humidity RA and the return air enthalpy are calculated from the temperature and humidity of the return air detected by the suction detection means 9 which is the room temperature and the suction humidity detection means 10 which is the room humidity (ST1, ST2). : Outside air temperature / humidity detection step), the outside air temperature humidity OA and the outside air enthalpy are calculated from the outside air temperature and humidity detected by the outside air temperature detecting means 11 and the outside air humidity detecting means 12 (ST3, ST4: outside air temperature humidity detecting step). . Next, target indoor air temperature and humidity are calculated from the target temperature and target humidity (ST5: target indoor air temperature and humidity setting step). Next, in ST6 (indoor air conditioning load detection step), a target blowing air temperature / humidity SA * is set from the return air temperature / humidity RA and the indoor air conditioning load QL detected in advance. As described above, the indoor air conditioning load can be easily obtained from the blowing temperature and humidity and the return temperature and humidity. In ST7, the outside air enthalpy is compared with the return air enthalpy. If the outside air enthalpy is larger than the return air enthalpy, the operation of the zone (1) is performed (ST9). If the outside air enthalpy is smaller than or equal to the return air enthalpy as a result of comparing the outside air enthalpy and the return air enthalpy in ST7, a straight line that is a vector connecting the return air temperature / humidity RA and the target blown air temperature / humidity SA *. B is subtracted to determine whether the outside air temperature humidity OA is above or below the straight line B (ST8). When the outside air temperature / humidity OA is on the upper side of the straight line B, that is, in the region lower than the return air temperature / humidity RA, it is in the zone (2) (ST10). In some cases, zone (3) (ST11) is used.

Actually, for example, in order to know the positional relationship between two points on a plane, the outer product of the two points can be calculated and the result can be determined by the sign of the result. The outer product is the two vectors C (c1, c2), D (d1, d2)
C x D = c1xd2-d1xc2
It can be calculated by the following formula. Using this, it is possible to easily know in which of the three zones the outside air temperature humidity OA is located. C and D are vectors, which are quantities having a magnitude and a direction. When C * D> 0, C exists clockwise from D.

  Next, processing for setting the outside air introduction amount, the air conditioning capability, and the heating amount in each of the three regions will be described. FIG. 10 is a flowchart showing a processing procedure when the outside air temperature humidity OA1 in FIG. 7 is in the zone (1) region, that is, when the outside air temperature humidity OA1 is higher in enthalpy than the return air temperature humidity RA. In this case, since the air conditioning load is increased by introducing the outside air, the outside air is not introduced when the energy saving effect is important. For example, by closing the damper 67 and stopping the fan 31, the outside air introduction means 6 is closed and only the return air from the room is circulated. However, outside air may be introduced when ventilation is required due to user requirements. Even if the setting is made so that the outside air is not introduced, the outside air introduction amount may not actually become zero due to a gap between the walls, and the outside air introduction means 6 may be operated so that the outside air introduction amount is minimized. .

  In the processing flow, it is determined whether or not ventilation is required in ST21. If ventilation is required, the outside air introduction amount is set to a predetermined amount for ventilation, for example, the damper 17 of the outside air introduction means 6 is fully opened. The fan 16 is rotated at a high speed (ST22). The intake air temperature / humidity KA of the indoor heat exchanger 3 sets the temperature / humidity of the mixed air in which the return air and the outside air are mixed (ST23). On the other hand, if ventilation is not required, the outside air introduction means 6 is closed and the outside air introduction amount is set to 0 (ST24), and the return air temperature humidity RA is set as the intake air temperature humidity KA of the indoor heat exchanger 3 ( ST25). In ST26, it is determined whether or not the control vector can be realized, that is, whether or not the SHF allowable range of the refrigeration cycle. If the extension line of the control vector to the intake air temperature / humidity KA and the target blown air temperature / humidity SA * intersects the saturation line and is within the allowable range of the evaporation temperature, the process of ST27 is performed. In ST27, on the wet air diagram, a control vector for determining the air conditioning capacity from the intake air temperature / humidity KA and the target blown air temperature / humidity SA * is set. That is, a vector connecting the intake air temperature / humidity KA and the target blown air temperature / humidity SA * is set, and the temperature at the intersection of the extension line of this vector and the saturation line is set as the refrigerant temperature of the indoor heat exchanger 3. If the extension line of the control vector does not intersect with the saturation line in the determination of ST26, it is out of the allowable range. In ST28, the outlet side air having the same level as the target humidity is discharged from the indoor heat exchanger 3 in the SHFmin operation. The air conditioning capacity, the refrigerant temperature, and the heating amount of the heater are set so that the heater 4 is heated to the target temperature to obtain the target blown air temperature and humidity SA *. In ST61 (operation control step), the outside air amount set by the outside air amount control means 83 is introduced into the indoor unit 1, and the refrigeration cycle is operated based on the control vector set by the operation operation control means 84. Further, the heater 4 is operated as necessary. Actually, each component of the air conditioner, such as the operating frequency of the compressor 71, the opening degree of the expansion valve 75, the rotational speed of the indoor fan 5 and the outdoor fan 24, the heater 4, and the outside air introducing means 6, is operated. The By repeating ST21 to ST28 and ST61 in a cycle of a certain time, for example, about 1 minute, the indoor air condition gradually becomes the target indoor air temperature and humidity t, and the air conditioning of the indoor 2 is performed.

  Zone (2) is a region lower in enthalpy than return air temperature / humidity RA and lower than line B connecting return air temperature / humidity RA and target blowing air temperature / humidity SA *, that is, a region above line B. The control when the outside air temperature humidity OA2 exists in this zone (2) will be described. In other words, the zone (2) is an area where the outside air enthalpy is smaller than the return air enthalpy and the outside air temperature is lower than the return air temperature. This is a region excluding the outside air temperature humidity in which the rate of change is larger than the rate of change of the humidity difference with respect to the temperature difference between the target blown air and the return air. When the outside air is in the zone (2), the outside air is introduced to mainly use it for lowering the temperature of the indoor air by utilizing the low temperature characteristic of the outside air, and the heat with the refrigerant in the indoor heat exchanger 3 using the refrigeration cycle. The control mainly reduces the humidity of the room air by replacement. When the temperature to be lowered by outside air is insufficient, the temperature is lowered by a refrigeration cycle.

  FIG. 11 is a flowchart showing a processing procedure when the outside air temperature humidity OA2 is in the zone (2) region, and FIGS. 12 and 13 are explanatory diagrams showing how control vectors are determined. In ST31, it is determined whether or not a line extending by connecting the return air temperature / humidity RA and the target blowing air temperature / humidity SA * intersects with a saturation line, that is, whether or not the extension line reaches a saturation line indicating an allowable refrigerant temperature. ST32, ST33, and FIG. 12 show how to determine the control vector when judging and crossing. In the case of crossing, look for the point where the saturation line H and the extension line touch so as to operate at the sensible heat ratio SHFmin where the dehumidification capacity is maximum, or find the ET which is the lower limit of the allowable range of the refrigeration cycle, and the extension corresponding to this point The temperature / humidity KA2 of the mixed air is set on the line, and is set as the intake air temperature / humidity KA (ST32). The temperature and humidity of the intake air mixed with the room air by introducing the outside air changes in relation to the temperature and humidity depending on the amount of outside air introduced between the outside air temperature humidity OA2 and the return air temperature humidity RA. As shown in the diagram, the temperature and humidity on the straight line connecting OA2 and RA are shown in the wet air diagram. Therefore, in consideration of a control vector connecting the point on the OA2-RA, the target blowing air temperature / humidity SA *, and the evaporation temperature within the allowable range on the saturation line, the temperature becomes as low as the indoor heat exchanger temperature allows. As described above, when a control vector having the maximum dehumidifying capacity, that is, a control vector having a large change in humidity with respect to a change in temperature, that is, an extension line in which the saturation line H and the extension line are in contact, is selected, the intake air temperature and humidity becomes KA2. At this time, the outside air introduction amount is set by the ratio of the internal dividing point KA2 between RA and OA2 (ST33), and then the process of ST39 is performed.

  Here, selecting a control vector having a large amount of change in humidity relative to the amount of change in temperature means selecting so that the temperature of the intake air approaches the temperature of the target blown air, or the slope of the control vector becomes large. By doing this, the low temperature characteristics of the outside air are utilized to the maximum.

  ST34 to ST38 and FIG. 13 show how to determine the control vector when it does not intersect with the saturation line in ST31. In this case, the extension line from the return air temperature / humidity RA to the target blown air temperature / humidity SA * deviates from the saturation line indicating the allowable refrigerant temperature, and the target blown air temperature / humidity SA from the return air temperature / humidity RA. Since it is not possible to cool and dehumidify directly to *, cool and dehumidify within the allowable range of SHF of the refrigeration cycle. That is, a point on OA2-RA including OA2 and RA, a humidity of the same level as the target blowing air temperature humidity SA * (on a line passing through SA * and parallel to the horizontal axis), and within an allowable range on the saturation line The refrigeration cycle is operated as a control vector by connecting the evaporation temperature, and when it is cooled too much, the outlet side air flowing out from the indoor heat exchanger 3 is heated by the heater 4 to obtain the target blown air temperature and humidity SA *. In this case, when energy saving is important, when the return air temperature / humidity RA is cooled and reheated, and when the outside air temperature / humidity OA2 is cooled and reheated, the air conditioning capacity that is an input to the air conditioner The sum of the inputs to the heater 4 at the time of reheating is compared, and the operation is performed with the smaller total input energy. Here, the outside air introduction amount is set to 0% or 100% of the intake air amount. For example, even if the outside air introduction amount is set to 0% or 100%, the configuration or installation of the outside air introduction means 6 is actually performed. Depending on the condition, it may not be completely 0% or 100%. In this case, what is necessary is just to drive | operate so that the outside air introduction means 6 may become the minimum or the maximum which can introduce outside air.

  In the process flow, the return air temperature / humidity RA is dehumidified and reheated in ST34 and reheated to obtain the target blown air temperature / humidity SA * and the input energy to the heater 4 is calculated as E (RA). The air conditioning capacity and the input energy to the heater 4 when the OA2 is cooled and dehumidified and reheated to obtain the target blown air temperature and humidity SA * are calculated as E (OA2). In ST36, E (RA) and E (OA2) are compared, and the smaller input energy amount is selected in ST37 and ST38, the outside air introduction amount (0 or 100%: minimum or maximum) is set, and the suction air The temperature / humidity KA, the heater input amount, etc. are set.

  In ST39, a control vector for determining operation control is obtained from the intake air temperature / humidity KA and the target blowing temperature / humidity SA *. In ST61 (operation control step), the outside air amount control means 83 and the operation operation control means 84 operate the refrigeration cycle based on the determined control vector. Moreover, it heats as needed. Actually, each component constituting the air conditioner is operated according to the operating frequency of the compressor, the rotational speeds of the indoor and outdoor fans, the input of the heater 4, and the amount of outside air introduced. By repeating ST31 to ST39 and ST61 in a cycle of a certain time, for example, about 1 minute, the indoor air condition gradually becomes the target indoor air temperature and humidity t, and the air conditioning of the indoor 2 is performed.

  Zone (3) has a lower enthalpy and lower humidity than the return air temperature / humidity RA, and a region on the lower humidity side than the line B connecting the return air temperature / humidity RA and the target blowing air temperature / humidity SA *, that is, lower than the straight line B. The control when the outside air temperature humidity OA3 is in the zone (3) will be described. In other words, the area of this zone (3) is the rate of change of humidity with respect to the temperature of the outside air and the return air in the area where the outside air enthalpy is smaller than the return air enthalpy and the outside air humidity is lower than the return air humidity. However, it is an area | region except the external temperature humidity which becomes smaller than the change rate of the humidity with respect to the temperature of target blowing air and return air. When the outside air is in the zone (3), the low humidity characteristic of the outside air is used, the outside air is introduced and mainly used for lowering the humidity of the indoor air, and the heat with the refrigerant in the indoor heat exchanger 3 using the refrigeration cycle. Control is performed mainly to reduce the temperature of room air by replacement. If the humidity is low due to the outside air, the humidity is lowered by the refrigeration cycle.

  FIG. 14 is a flowchart showing a processing procedure when the outside air temperature humidity OA3 is in the zone (3) region, and FIGS. 15, 16, and 17 are explanatory diagrams showing how to determine the control vector. In this case, the enthalpy is the smallest when the intake air temperature / humidity KA is the same as the outside air temperature / humidity OA3. Therefore, in ST41, whether or not a line extending by connecting the outside air temperature humidity OA3 and the target blowing air temperature and humidity SA * intersects the saturation line, that is, whether or not this extension line reaches a saturation line indicating the allowable refrigerant temperature. ST42 to ST45 and FIGS. 15 and 16 show how to determine the control vector when making a judgment and crossing. In this case, the low humidity characteristic of the outside air is used, and the refrigeration cycle is set to operate at the sensible heat ratio SHFmax. The temperature and humidity of the intake air mixed with the indoor air by introducing the outside air changes in relation to the temperature and humidity depending on the amount of outside air introduced between the outside air temperature humidity OA3 and the return air temperature humidity RA, as shown in FIG. In the wet air diagram shown in FIG. 16, the temperature and humidity are on a straight line connecting OA3 and RA. Therefore, considering a control vector connecting the point on the OA3-RA, the target blown air temperature / humidity SA *, and the evaporation temperature within the allowable range on the saturation line, the dehumidification capacity is minimized, that is, the change in humidity with respect to the change in temperature. 15 is selected, OA3 in the case of FIG. 15 and KA3 having the same humidity as SA * in the case of FIG. 16 become the intake air temperature / humidity KA.

  In the processing flow, the absolute humidity of the outside air and the absolute humidity of the target blown air are compared in ST42. If the absolute humidity of the outside air is larger, the outside air introduction amount is set to 100% as shown in FIG. The outside air temperature humidity OA3 is set to the air temperature humidity KA (ST43). At this time, if the outside air introduction amount cannot actually be 100%, the maximum introduction amount that can be introduced by the outside air introduction means 6 is set. That is, introduce as much outside air as possible. When the absolute humidity of the target blown air is greater than the outside air in the comparison of ST42, as shown in FIG. 16, the sensible heat ratio SHFmax, in this case, approximately 1 defined on the wet air diagram. The temperature / humidity KA3 is set to the suction air temperature / humidity KA (ST44). At this time, the outside air introduction amount is set at the ratio of the internal dividing point KA3 between RA and OA3 (ST45), and then the process of ST51 is performed.

  Here, selecting a control vector with a small amount of change in humidity relative to the amount of change in temperature means selecting so that the humidity of the intake air approaches the humidity of the target blown air, or the slope of the control vector becomes small By doing so, the low-humidity characteristics of the outside air are utilized to the maximum.

  ST46 to ST50 and FIG. 17 show how to determine the control vector when it does not intersect with the saturation line in ST41. In this case, the extension line from the outside air temperature humidity OA3 to the target blown air temperature humidity SA * deviates from the saturation line indicating the allowable refrigerant temperature, and from the outside air temperature humidity OA3 to the target blown air temperature humidity SA *. Since cooling and dehumidification cannot be performed directly, cooling and dehumidification are performed within the allowable range of SHF of the refrigeration cycle. That is, a point on OA3-RA including OA3 and RA, a humidity of the same level as the target blown air temperature and humidity SA * (on a line passing through SA * and parallel to the horizontal axis), and within an allowable range on the saturation line The refrigeration cycle is operated as a control vector by connecting the evaporation temperature, and when it is cooled too much, the outlet side air flowing out from the indoor heat exchanger 3 is heated by the heater 4 to obtain the target blown air temperature and humidity SA *. In this case, when energy saving is regarded as important, when the return air temperature / humidity RA is cooled and reheated, and when the outside air temperature / humidity OA3 is cooled and reheated, the air conditioning capacity that is an input to the air conditioner The sum of the inputs to the heater 4 at the time of reheating is compared, and operation is performed with the smaller total input energy.

  In the processing flow, the return air temperature / humidity RA is dehumidified and reheated in ST46, and the air conditioning capacity and the input energy to the heater 4 when calculating the target blown air temperature / humidity SA * are calculated as E (RA). The air conditioning capacity and the input energy to the heater 4 when the OA3 is cooled and dehumidified and reheated to obtain the target blown air temperature and humidity SA * are calculated as E (OA3). In ST48, E (RA) and E (OA3) are compared, and in ST49 and ST50, the smaller input energy amount is selected, the outside air introduction amount (0 or 100%: minimum or maximum) is set, and the suction air The temperature / humidity KA, the heater input amount, etc. are set.

  In ST51, a control vector for determining operation control is obtained from the intake air temperature / humidity KA and the target blowing temperature / humidity SA *. In ST61 (operation control step), the outside air amount control means 83 and the operation operation control means 84 operate the refrigeration cycle based on the determined control vector. Heating is performed as necessary. Actually, each component constituting the air conditioner is operated according to the operating frequency of the compressor, the rotational speeds of the indoor and outdoor fans, the input of the heater 4, and the amount of outside air introduced. By repeating ST41 to ST51, ST61 in a cycle of a certain time, for example, about 1 minute, the indoor air condition gradually becomes the target indoor air temperature and humidity t, and the air conditioning of the indoor 2 is performed.

  In the above, it is divided into whether zone (1) and other zones (2) and zone (3) introduce external air. In the case of one zone (1), the outside air enthalpy is larger than the return air enthalpy, so air conditioning is performed in the refrigeration cycle without introducing outside air, and in the other zones (2) and (3), the outside air enthalpy is Since it is smaller than the return air enthalpy, outside air is introduced as much as possible for indoor air conditioning. Further, the zone (2) and the zone (3) can be divided into an operation with a large dehumidifying capacity or a high sensible heat operation with the air conditioning capacity of the refrigeration cycle. In the case of one zone (2), the refrigeration cycle is operated with a large dehumidifying capacity by utilizing the low temperature characteristics of the outside air. In the case of the other zone (3), the refrigeration cycle performs high sensible heat operation using the low humidity characteristics of the outside air. In this way, by dividing into zones according to the temperature and humidity conditions of the outside air with respect to the temperature and humidity conditions of the indoor air, and setting the control suitable for each, the amount of outside air introduction becomes the optimum amount for the air conditioning target, and without wasteful work It is possible to use the outside air to the maximum and save energy.

  As described above, outside air is actively introduced according to the outdoor air condition relative to the indoor air condition, effectively used for air conditioning, and the energy of the air heat-treated by the air conditioner is controlled to a minimum. Therefore, energy saving can be realized while introducing fresh outside air. In particular, since fine control is performed in consideration of humidity as well as the temperature of outside air and room air, a more comfortable room space can be obtained. In addition, since the target indoor air state is approached while controlling the temperature and humidity while being related to each other, the target indoor space can be obtained faster and energy saving can be achieved. In addition, by keeping indoor air fresh with fresh outside air, it is possible to secure good indoor air in quality, and it can be expected to have a positive effect on the health of indoor people or animals and plants.

  The description so far has been mainly focused on the ventilation between the room 2 and the outside, which is the outdoors. Ventilation has two actions, intake and exhaust. These are classified according to natural flow or blower, but the outside air is mainly exhausted by fans, that is, mechanical ventilation or forced ventilation. It has been explained in the configuration. In the present invention, the above explanation has been given for the purpose of controlling the focus, but it is not outdoor, for example, a sanitary room or a basement, etc. Of course, the control of the present invention may be used when adjusting the temperature and humidity conditions at night. Furthermore, intake and exhaust may be forcibly performed as a type of ventilation, and in a specific temperature and humidity environment, for example, an environment where the amount of outside air introduction is always determined, the ventilation opening is not provided without providing the ventilation fan 31. It is also possible to use a configuration in which ventilation is provided with an indoor fan. Although the present invention has been described on the air diagram, these can be easily obtained by vector calculation on the air diagram described in the microcomputer. Alternatively, as described above, the air diagram is a diagram in which the mutual relationships between physical quantities are summarized in the drawing, and between the physical quantities can be obtained by calculation. For example, in the control content of how to operate the refrigeration cycle, blower, ventilation fan, etc. to obtain the set target temperature / humidity t *, the current return air temperature / humidity RA is not affected by the current capacity. Supply air temperature and humidity SA are maintained, and the absolute value of QL [Kcal / h], which is the magnitude of the indoor load in this state, is the air volume * density * difference in enthalpy between supply air and return air, It is represented by That is, | QL | = (VRA + VOA) * ρa * (iRA-iSA). The load ratio of latent heat and sensible heat with respect to this load state is LH [g] / SH [° C.] = (Xra-Xsa) / (Tra-Tsa). It is possible to grasp even a combination of arithmetic expressions without using an air diagram at all.

  The air conditioner is used for cooling from spring to autumn and mainly for heating in winter. However, it is not so much to apply a full load because the temperature drops at night, for example. For example, in the Kanto area, the average load factor is reported to be 13.3%. FIG. 18 is an explanatory diagram of the outside air temperature humidity distribution. The temperature and humidity of Tokyo's outside air at all times of day and night from May to September, which are mainly operated by cooling. The temperature is plotted on the horizontal axis and the absolute humidity is plotted on the vertical axis. The number of hours divided by a certain temperature of 26 degrees and a humidity of 50% is described. “a” indicates that the time when the temperature and the humidity are lower than the reference values is 595 hours and the time when the temperature is low and the humidity is high is 140 hours in 744 hours for May. In b, the time when the temperature is low and the humidity is high in June is 458 hours, the time when the temperature and humidity are both low is 203 hours, and the time when both the temperature and humidity are high is 59 hours. c shows 420 hours when the temperature is low and the humidity is high in July, 280 hours when the temperature and humidity are both high, and 40 hours when both the temperature and humidity are low. d shows that the time when the temperature and humidity are high in August is 430 hours, and the time when the temperature is low and the humidity is high is 312 hours. “e” indicates that the time when the temperature is low and the humidity is high in September is 363 hours, the time when the temperature and humidity are both high is 187 hours, and the time when both the temperature and humidity are low is 170 hours. f indicates the total time from May to September.

  It can be seen that only 26% of the outside air is higher than the target values of the room temperature and humidity in the range of 5 months from May to September. In addition, it can be seen that even when the temperature is low, the time when the humidity is high is very large. Of course, in an air conditioner, it is necessary to remove the heat load and moisture generated indoors, and it can be roughly determined from this figure that the use of a low temperature of the outside air is very effective. Furthermore, the indoor load can be obtained by a predetermined coefficient * indoor area * temperature difference. If this load is obtained by averaging the above temperature distributions, the average annual load factor of the air conditioner is only 13.3% of the maximum cooling capacity. Therefore, it is possible to make the cooling capacity and the reheating capacity as small as possible by effectively using the ventilation by outside air. Of course, this relationship changes depending on regional characteristics and weather fluctuations, but the humidity of the outside air is measured and the outside air is used, that is, the annual ventilation is effectively used to ventilate, cool, dehumidify and prevent overcooling with less energy. Can be done. As a result, it is possible to avoid turning on and off a small-capacity load such as air-conditioning at night by introducing outside air, which not only reduces energy, but also reduces noise and prevents the body from getting too cold. can get. It can respond effectively to mid-term cooling needs such as spring and autumn. Conventionally, ventilation fans have been considered mainly for ventilation of indoor polluted air, but energy can be reduced by accurately using the temperature and humidity of the outside air introduced.

  As mentioned above, the air diagram is adopted because it is easy to understand when determining the enthalpy difference and the positional relationship between temperature and humidity.There is no need to use an air diagram, and each physical quantity has a correlation. Although it is calculated | required by calculation, you may memorize | store the relationship between temperature and humidity as a chart in a microcomputer. In the present invention, the outside air is introduced and the temperature and humidity are adjusted as described above. However, if digital control is used, continuous simultaneous processing is possible. Further, calculation and operation may be performed by intermittent processing in consideration of the delay due to the thermal time constant of the indoor temperature. In addition, the temperature and humidity detected for this process are handled as one parameter, and the operation amount such as setting of target value and capacity is calculated, and the device is operated by this data. Calculations combining individual parameters as separate parameters are also possible. In other words, it is already possible to control the refrigeration cycle and ventilator with temperature control without knowing that the humidity is within the specified range or while controlling the humidity. Of course it is as effective as it is. As described above, the present invention changes at least one of the temperature and humidity of the indoor air that is circulated by sucking indoor air from the air inlet and blowing it out from the air outlet by the indoor fan of the air conditioner indoor unit having the air inlet and outlet. The ventilation unit on the suction side of this indoor unit and the opening for introducing outside air into the room from the outside or exhausting air from the room to the outside, the shutter for opening and closing this opening, and ventilation A device for adjusting the amount, for example, adjusting the rotation speed of the fan or changing the angle of the shutter to adjust the ventilation may be provided. Thereby, in the indoor heat exchanger of the air conditioner, both the return air from the room sucked from the suction port and the outside air introduced by the ventilation fan are cooled or heated. The temperature and humidity of the outside air are detected, the temperature and humidity of the air sucked into the air conditioner from the room, and the temperature and humidity of the air blown from the air conditioner and circulated in the room are also detected, and the temperature and humidity of the room air are That is, adjust the refrigeration cycle of the air conditioner, change the rotation speed of the indoor fan, adjust the rotation speed of the ventilation fan and the shutter so that the temperature and humidity returned to the air conditioner approach the target temperature and humidity. ing.

  Although the present invention detects the temperature and humidity of each part, the temperature is also related to the load amount and air volume in the room, and may be directly measured or indirectly obtained. In addition, the humidity depends on the season and weather, and it may not always be necessary to strictly measure indoor air conditioning. Also good. Alternatively, it is also possible to send data detected from a distant place on a telephone line or a power line as information, and based on this information, perform operations related to temperature / humidity control as well as stop operation of the equipment.

  The device of the present invention hardly ventilates by outside air when summer temperature and humidity are both high, but when temperature is relatively low and humidity is low, when temperature and humidity are low, temperature is high but humidity is low Sometimes the ventilation is set so that less energy is used for air conditioning. As an example of the energy-saving effect, when the outside air temperature humidity is low in the zone (2) and low temperature and high humidity, the room temperature is cooled using the low temperature of the outside air and the load when the maximum dehumidifying operation is performed in the refrigeration cycle is estimated. View. In the case of an outside air temperature of 21 ° C. and an absolute humidity of 12 g / kg (relative humidity of about 77%), which frequently appear in June, the target indoor temperature / humidity of about 8 tatami indoors is 26 ° C. and 12.8 g / kg (relative). It is assumed that there are two people in the room at a humidity of about 60%. The sensible heat ratio SHFmin is when the return air / outside air introduction ratio is 0.65: 0.35, and the load ratio due to enthalpy (the enthalpy difference between the intake air and the target blowing air) / (the return air and the target blowing). The enthalpy difference of air) is 0.5. That is, when the outside air is positively introduced as in the present embodiment, for example, when air is conditioned by introducing the outside air by 35% of the total air volume of the indoor unit, the outside air is not introduced as in the conventional case. The air can be conditioned with half the energy required for air conditioning by circulating only the return air from the air as suction air.

  In the above description, the control in the case of the energy saving operation has been described. However, when a predetermined ventilation amount is necessary, the same control can be performed after securing the ventilation amount. Further, the heater 4 is not necessarily required and may not be particularly provided. In this case, when the maximum dehumidification operation SHFmin of the refrigeration cycle is not sufficient for dehumidification and the control vector cannot be realized, the operation is performed so that the temperature of the target blown air is increased and the temperature is satisfied, and the outlet side air flowing out from the indoor heat exchanger 3 is discharged. It is also possible to provide a dehumidifying means for dehumidifying and control the target blown air temperature and humidity SA *. Furthermore, the heating means 4 may not be provided inside the indoor unit 1, and the air flow path downstream of the indoor heat exchanger 3, that is, the outlet of the air flowing out from the indoor heat exchanger 3, the target indoor air temperature and humidity, It suffices to be in a position where the air flowing through the air flow path between the desired areas, for example, the areas where people live, is heated.

  In addition, if an outside air treatment filter is provided on the entire outside air introduction port of the outside air introduction means 6 to prevent pollen, dust, and dust mixed in the outside air from being taken into the room, the indoor space becomes healthier and more comfortable. Can be kept in. Moreover, if this outdoor air filter is made of a material that adsorbs malodors or the like, at least a part of the outdoor air treatment filter can prevent bad odors mixed with the outside air from entering the room on the day of garbage collection.

  As described above, the air condition involved in the control when air-conditioning the room is the return air (RA) that is room air, the outside air (OA), the mixed air that is suction (KA), and the air that circulates in the room. The temperature and humidity of each of the blown air (SA) are related to each other. For this reason, all these values may be obtained by calculation without actually detecting them. Moreover, you may obtain | require by calculation from other methods, for example, information, such as the frequency of a compressor, evaporation temperature, tube temperature, and the rotational speed of a fan. For example, the temperature and humidity of return air, blown air, and outside air are detected by measurement as the indoor air state, and the temperature and humidity of the mixed air are calculated. Also, instead of detecting the temperature and humidity of the outside air by measurement, the temperature and humidity of the intake air mixed with the outside air and the return air are measured and detected, and the outside air is detected from the detected value, the outside air volume VOA and the return air volume VRA. The temperature and humidity may be calculated. Furthermore, the temperature is also related to the indoor load and air volume, and can be obtained indirectly from these. In addition, the humidity depends on the season, weather, etc., and it may not require so strict measurement when performing indoor air conditioning. Alternatively, it may be detected indirectly by estimation or calculation from other parameters. If both the return air and blown air conditions are measured, the indoor air conditioning load can be accurately grasped, but this indoor air conditioning load can be estimated from other information such as the operating state of the refrigeration cycle. Alternatively, one of the return air and the blown air may be detected by measurement and the other may be estimated. In addition, the temperature and humidity of the return air are detected as the indoor air condition. However, the temperature and humidity of the return air are not limited to the return air, but are not limited to the return air. And humidity may be detected and used. In the case of a predetermined place in the room, the air condition during the indoor air-conditioning load is detected, but if the indoor air-conditioning load from the measurement place is grasped, it can be controlled similarly.

Embodiment 2. FIG.
In the first embodiment, the outside air introduction means 6 is configured integrally with the indoor unit 1, whereby outside air is introduced into the indoor unit 1, and the indoor air circulates and mixes with return air taken into the indoor unit 1. Thus, the air is sucked into the indoor heat exchanger 3. In the present embodiment, the outside air introduction means 6 is separated from the indoor unit 1 instead of being integrated with the indoor unit 1 and is separately arranged so that the outside air is taken into the room 2. However, the operation of the air conditioner, refrigeration cycle, and ventilator detects the temperature and humidity conditions of the outdoor and indoor air, and uses the correlation between the physical quantities shown on the air diagram or air diagram to determine the temperature and humidity. It is the same as in the first embodiment that the state is treated as a vector, the enthalpy is calculated, and the energy used is reduced as in the first embodiment. In addition to this configuration and operation, the same effect can be obtained. The same as in the first embodiment.

  FIG. 19 is a partial configuration diagram showing a configuration in the vicinity of the indoor unit 1 arranged in the room of the air-conditioning apparatus according to the present embodiment. The same reference numerals as those in the drawings described in the first embodiment denote the same components. The outside air introduction means 6 is attached to, for example, a wall surface in the room, and fresh air outside the room can be taken into the room. This outside air introduction means 6 has, for example, a damper 67 and a fan 31 for sucking outside air as an outside air inlet opening / closing mechanism, and adjusts the opening / closing or opening of the damper 67 or changes the rotational speed of the fan 31. Thus, the amount of outside air introduced into the room can be controlled. Reference numeral 69 denotes a control signal line, which is connected to a microprocessor in the electronic box 32 installed in the indoor unit 1. For example, a control signal from the outside air amount control means 83 in the microprocessor is transmitted to the outside air introduction means 6 to actually perform opening / closing control of the damper 67, opening degree control, and rotation speed control of the fan 31.

  19 and 20 are diagrams for explaining the configuration and operation of an air conditioner according to another embodiment of the present invention. In the first embodiment, the ventilation fan 6 that takes in outside air is integrated with the indoor unit of the air conditioner, that is, the indoor unit 1. The same reference numerals as those in the above description denote the same components. FIG. 20 is a diagram for explaining the contents of control in which the temperature and humidity are integrally controlled in an air conditioner having a structure in which the indoor unit and the ventilation fan are separated from each other so as to approach the target value. As shown in FIG. 19 and FIG. 20, the intake air, that is, the return air that returns to the indoor heat exchanger 3 in the indoor unit 1, that is, return air is cooled in the heat exchanger 3 by the refrigerant circulating in the refrigeration cycle. The air is dehumidified and supplied to the room as blown air or supply air by the rotation of the indoor fan 5. The return air and the supply air flow rate are the same and are VRA. A ventilator 6 which is an outside air introducing means provided adjacent to the air conditioner at a position different from the indoor unit, for example, at the lower wall surface where the air conditioner outlet is located, supplies the outside air to the same room. The air volumes of supply air and outside air are added, that is, the return air volume VRA and the outside air volume VOA are mixed air of VRA + VOA and circulate in the room. Therefore, when the rotation speed of the indoor fan is constant, a substantially constant return air is secured. If the relationship between the fan speed and the air volume is stored in the memory of the microcomputer, each air volume in the air volume ratio and the air volume when calculating the load by Equation 1 can be easily calculated. The temperature / humidity KA of the mixed air circulated in the room is increased in temperature and humidity by the sensible heat SH and the latent heat LH of the load QL to be in the temperature / humidity state of the return air temperature / humidity RA.

  T and X symbols such as TOA and XOA shown in the figure indicate temperature and humidity as described above, and humidity is an absolute value. In the detecting means for measuring temperature and humidity, the inlet temperature detecting means 9 and the inlet humidity detecting means 10 are attached to the position of the inlet grill 35 of the air conditioner as shown in FIG. Further, as shown in FIG. 1, the outside air introduction means 6 which is a ventilation fan is at a position different from that in FIG. 1, but the outside air temperature detection means 11 and the outside air humidity detection means 12 are the same as those in FIG. It is attached to the indoor side. The outlet temperature detecting means 13 and the outlet humidity detecting means 14 are also provided at the outlet of the air conditioner as shown in FIG. However, in the configuration of FIG. 1, the outlet temperature detecting means 13 and the outlet humidity detecting means 14 are attached to measure the temperature of the mixed air inside the outlet grill 34 of the air conditioner. The air from the outlet is return air, and the temperature and humidity of the mixed air, that is, the air circulating in the room, are the temperature and humidity measured near the grill of the outlet and the temperature measured at the outlet of the ventilation fan. For air and humidity, the air volume at each position is obtained from the rotation speed of the indoor fan and the ventilation fan, and is obtained as an average value corresponding to the air volume ratio. Of course, if the air outlet temperature detecting means 13 and the air outlet humidity detecting means 14 are structured such that the air conditioner indoor unit and the ventilation fan are disposed adjacent to each other and are blown downward from the indoor unit, both the air outside the lower part of the indoor unit 1 is provided. May be directly measured by detectors 52 and 53 that detect the temperature and humidity of the mixed air. Even if the indoor unit 1 of the air conditioner and the ventilation fan are located at a distance from each other, a detector for measuring the temperature and humidity of the mixed air may be provided at the mixing position.

  In the first embodiment, the mixed air of the outside air and the return air circulates in the room and becomes air sucked into the indoor heat exchanger 3 to exchange heat with the refrigerant flowing through the indoor heat exchanger 3. The temperature / humidity SA of the blown air circulates in the room and becomes the return air temperature / humidity RA that receives the heat load in the room and returns, and the load QL can be known from the temperature / humidity SA and RA. That is, in the air diagram, the temperature and humidity RA is obtained by adding the vector of the load QL to the temperature and humidity SA. Since this load QL vector is known, the load QL vector can be translated so that the temperature and humidity RA of the return air overlap the temperature and humidity t of the target point, and the temperature and humidity SA * of the target blown air can be obtained. The supply air temperature / humidity SA is detected or known from the indoor load. In this state, if the temperature / humidity KA of the mixed air is on the segment of the outside air temperature / humidity OA and the return air temperature / humidity RA, the difference between the enthalpy of the temperature / humidity KA of the mixed air and the enthalpy of the temperature / humidity SA of the supply air is minimized. KA * with the lowest energy can be obtained by obtaining i (KA * -SA *) minimum. On the other hand, in the second embodiment, only the return air becomes the intake air to exchange heat with the refrigerant, and the air blown out from the indoor unit 1 and the outside air are mixed. Therefore, in the second embodiment, the temperature / humidity OA and the air volume VOA of the outside air, the temperature / humidity SA and the air volume VSA of the blown air are detected, or can be obtained from the detected values. Similarly, on the air diagram, the temperature / humidity KA of the mixed air, that is, the circulating air circulating in the room, is on the line connecting the temperature / humidity OA of the outside air and the temperature / humidity SA of the blown air, and at a point proportional to the air volume ratio. Desired. The temperature and humidity KA of the mixed air circulates in the room, receives the load QL, and returns to the air conditioner as return air RA. That is, the temperature / humidity RA is obtained by adding the vector of the load QL to the temperature / humidity KA calculated or measured in the air diagram. Since the load QL vector is known, the load QL vector can be translated so that the temperature and humidity RA of the return air overlap the temperature and humidity t of the target point, and the temperature and humidity KA * of the target mixed air can be obtained. In this state, the enthalpy of the return air temperature / humidity RA and the supply air temperature / humidity SA are located where the temperature / humidity SA of the blown air is on the line segment of the outside air temperature / humidity OA and the mixed air temperature / humidity KA * circulating in the room. If the determination is made that the difference between the two is minimized, i.e., i (RA-SA *) minimum, SA * having the smallest energy is obtained.

  In the first embodiment, as a method for obtaining i (KA * -SA *) minimum, KA is somewhere at the internal dividing point of OA and RA, cooling dehumidification load = evaporator capacity = i (KA * -SA *) X Because of the air volume, the smaller the i (KA * -SA *) on the line segment of RA and OA, the smaller the capacity. However, there are various cases of outside air OA. In the zone (1) in FIG. 8, when RA = KA, KA * -SA * is minimized, and energy is reduced when outside air is not introduced. In the zone (2) of FIG. 8, the temperature and humidity KA * of the mixed air having the intersection where the vector line passing through KA and SA * on the internal dividing point of OA and RA contacts the saturation line H is KA * -SA *. Is minimized. In the zone (3) of FIG. 8, the temperature / humidity KA * of the mixed air in which the vector line passing through KA and SA * on the internal dividing point of OA and RA intersects with the saturation line H but SHF = 1 is obtained. KA * -SA * is minimized. On the other hand, in the second embodiment, the return air temperature / humidity RA is cooled and dehumidified to become the blown air temperature / humidity SA, and the circulation / circulation in which the blown air temperature / humidity SA and the outside air temperature / humidity OA are mixed and circulated in the room. Since the temperature and humidity KA of the air is added, and the indoor load QL is added to the temperature and humidity KA of the mixed air to obtain the temperature and humidity RA of the return air, in the second embodiment, as a method for obtaining i (RA-SA *) minimum, the mixed air KA is somewhere in the internal dividing point between the outside air OA and the blown air SA *, and cooling dehumidification load = evaporator capacity = i (RA-SA *) × air volume. Therefore, the temperature / humidity KA * of the mixed air is The smaller i (RA-SA *) is on the line between the temperature / humidity OA of the outside air and the temperature / humidity SA * of the supply air, the smaller the capacity. However, what is known is return air and mixed air, and the outside air OA may be various.

  The method for obtaining i (RA-SA *) minimum in the second embodiment is shown in the air diagram of FIG. 21, FIG. 22, and FIG. FIG. 21 is an explanatory diagram of the zone (1), and the hatched portion in the figure indicates the range of the zone (1). In the figure, the method of using fresh outside air differs depending on the zones classified by the return air temperature and humidity RA and the target mixed air temperature and humidity KA *. It is desirable not to use the high enthalpy-side outside air with respect to the temperature / humidity OA1 of the outside air in FIG. The temperature / humidity SA of the blown air of the air conditioner must be created on the opposite side of the temperature / humidity OA1 of the outside air across the temperature / humidity KA * of the target mixed air, which increases the energy of the refrigeration cycle. The enthalpy difference i (RA-SA *) minimum of the refrigeration cycle is minimum when SA * = KA *. FIG. 22 is an explanatory diagram of the zone (2), and the hatched portion in the figure indicates the range of the zone (2). In the range of zone (2) where the temperature and humidity OA2 of the outside air is lower than the energy of KA * and the temperature is lower than the vector RA-KA *, the refrigeration cycle makes full use of the dehumidifying capacity while making the best use of the low temperature characteristics of the outside air. . This saves energy, but there is a limit to the dehumidifying capacity. For example, it is possible when the extension line of the vector RA-SA * cannot touch the saturation line H or the indoor heat exchanger temperature ET is smaller than the allowable range. The minimum value of the sensible heat ratio, that is, the SHFRminimum which is the limit of the gradient of the vector RA-SA * is selected. In zone (2), the temperature and humidity SA of the air conditioner blown air is on the opposite side of the temperature and humidity OA1 of the outside air across the temperature and humidity KA * of the target mixed air, so the extension line of the vector RA-SA * is the saturation line. If the temperature / humidity SA of the target blowing air having a point in contact with H is selected, the target supply air temperature / humidity SA * that minimizes the enthalpy difference RA-SA * of the refrigeration cycle is obtained.

  FIG. 23 is an explanatory diagram of the zone (3), and the hatched portion in the figure indicates the range of the zone (3). In the zone (3) where the temperature and humidity OA3 of the outside air is lower than that of KA * and lower than the vector RA-KA *, the refrigeration cycle uses the low humidity characteristics of the outside air and has a high sensible heat. Do the driving. The temperature / humidity SA of the air conditioner that is set on the side opposite to the temperature / humidity OA1 of the outside air sandwiched between the temperature / humidity KA * of the target mixed air is the temperature / humidity SA of the return air and the temperature / humidity SA * of the blown air is air. When it becomes horizontal in the diagram, that is, when SHF = 1, the enthalpy difference RA-SA * of the refrigeration cycle is the smallest. The range in which the use of the outside air in the zone (1) according to the configuration of the second embodiment is not desirable increases compared to the integral configuration of the first embodiment. The control operation in the case of the configuration of the second embodiment will be described collectively with reference to FIG. The magnitude of the load is obtained by QL = (VRA + VOA) × density × enthalpy difference, and this load is the enthalpy difference between the temperature / humidity RA of the return air and the temperature / humidity KA of the mixed air, and is applied to the sensible heat load SH and the latent heat load LH. Divided. In order to achieve the target temperature / humidity t in the room, the temperature / humidity RA of the return air must be set to the target temperature / humidity t, and the target mixed air KA * is determined by moving the load in parallel. FIG. 21, FIG. 22 and FIG. 22 show the conditions that energy is less than the temperature / humidity KA * of the target mixed air due to the temperature / humidity state of the outside air, that is, the enthalpy difference between the return air temperature / humidity and the target supply air temperature / humidity is minimized. 23 will be selected. In the range of zone (3) in which the temperature and humidity of the outside air are lower than the vector RA-KA * in FIG. 24, the refrigeration cycle performs the high sensible heat operation, that is, the operation of SHF = 1, using the low humidity characteristic of the outside air. Thus, by determining the temperature and humidity state of each air, the indoor heat exchanger temperature ET * whose sensible heat ratio is within an allowable range is obtained. Further, the refrigeration cycle capacity Qe, that is, the vector RA · SA * is determined. Further, SA * is determined on the line segment of temperature and humidity OA and KA *, and the air volume ratio between the supply air and the outside air is determined based on the prorated ratio x * and y *. In this way, the basic idea of minimizing the enthalpy difference of temperature and humidity changes as much as possible while considering the allowable range of SHF of the refrigeration cycle is the same as in the first embodiment, and the energy-saving operation of the air conditioner becomes possible. .

  As the axis of enthalpy i is described in the air diagram of FIG. 3, the oblique axis of enthalpy i is uniquely determined by the following relationship between temperature and absolute humidity. That is, i = 0.24 * temperature + (597.5 + 0.441 * temperature) * absolute humidity. Therefore, if the temperature and humidity are detected, the microcomputer can calculate the size of the indoor load as energy and the load ratio of latent heat and heat. The absolute value of Ql [Kcal / h], which is the magnitude of the load in the room, is expressed as: air volume * density * difference in enthalpy between mixed air and return air. The load ratio between latent heat and sensible heat for this load state is LH [g] / SH [° C.] = (Xra-Xka) / (Tra-Tka), and the load state can be grasped by calculation. Note that the calculation of the air volume ratio of x: y is determined because, for example, the relationship between the rotational speed of the fan and the air volume is stored in the microcomputer of the control device, and the temperature and humidity SA of the supply air is the air temperature and humidity OA and the mixed air It is obtained on the extension line of OA and KA from the temperature and humidity KA and air volume ratio. The enthalpy between the return air temperature and humidity RA and the obtained supply air temperature and humidity SA in a straight line is the capacity Qe of the air conditioner. Furthermore, the point where this extension line intersects the saturation line with a relative humidity of 100% is regarded as the evaporation temperature ET. Since the air diagram data is stored, these calculations are easily performed by the microcomputer of the control device.

  The idea of increasing the compressor frequency for increasing the air conditioning capacity Qe is explained in detail in Equation 2, etc., but since the air conditioning capacity Qe is determined from the vector (RA, SA), the increase ΔQe is (Qe + ΔQe) / Qe = [i (RA-SA *)] / [i (RA-SA)]. On the other hand, if the current frequency is fz, the frequency increment is obtained as (fz + Δfz) / fz corresponding to the increase in the air conditioning capacity. When the outside air introduction means 6 is provided separately from the indoor unit 1 as in the present embodiment, the outside air utilization range for energy saving is narrower than that in the case where it is provided integrally. Compared to the conventional case where it is not actively used, there is an energy saving effect, and the health effect by introducing fresh outside air is also great. Further, in such a configuration, there is little change in the configuration from the indoor units that are currently widely used, and for example, it may be changed so that a control signal is transmitted to the outside air introduction means 6 through the signal line 69, so that it is relatively easy. realizable. Further, since it is not integrated, cleaning or maintenance of only the outside air introduction means 6 can be easily performed.

  Furthermore, since the outside air introduction means 6 is independent of the indoor unit 1, the outside air introduction means 6 can also have an action like a conventional ventilation fan. That is, for example, if the indoor air can be led out to the outside by inverting the fan, air conditioning with a large ventilation function can be performed. This example will be described with reference to FIG. FIG. 25 shows the same configuration in which the indoor heat exchanger 3 and the indoor fan 5 in the indoor unit 1 are provided, and the ventilation fan 6 that is an outside air introduction means, 31 is a ventilation fan, and 32 is an indoor control device. The contents of setting the operation with little or less enthalpy difference based on the temperature and humidity of each air such as return air and supply air are the same as the above description, but the outside air introducing means 6 differs in that the indoor air is exhausted by the ventilation fan 31, and therefore The temperature and humidity of the return air is obtained by subtracting the exhaust from the room air in a vector manner. The operation of the ventilation fan 31 is controlled by a signal from the indoor control device 32. An example of another configuration is shown in FIG. FIG. 26 also shows a configuration in which the air conditioner and the outside air introduction means 6 are provided separately. However, the outside air introduction means 6 is provided with a total heat exchanger, a supply fan 44 and an exhaust fan 43 to introduce outside air. It is the structure which transmits the heat | fever at the time of exhausting indoor air and does not waste indoor thermal energy. The operation of the air supply fan 44 and the exhaust fan 43 is controlled by a signal from the indoor control device 32. Even with this configuration, the supply of air from the outside air introduction means 6 requires vector calculation including the temperature and humidity of the region. However, as described above, low energy operation setting using the enthalpy difference of temperature and humidity is possible. There will be even more energy savings. 25 and 26 show an example in which the operation of the outside air introduction means is controlled by a microcomputer in the indoor control device, but it is natural that the operation may be controlled by another control device such as a remote controller. This signal is configured to be transmitted by providing a signal line. However, the signal may be transmitted along a power line along with electric power or may be configured without a signal line such as a radio wave.

  Regardless of whether it is an integral type structure or a separate type structure, the indoor heat exchanger temperature ET, which is the evaporation temperature, has been described as having an allowable range, and as an example, the lower limit value has been described at 10 ° C. The example which calculated | required this lower limit from the surface of the performance of the air conditioner is shown in FIG. 27 and FIG. FIG. 27 is an explanatory diagram for setting the indoor heat exchanger temperature ET on the air diagram. P is the temperature and humidity of the air sucked into the indoor heat exchanger 3, and the temperature is 24 ° C. and the relative humidity is 50%. In the integrated structure, this is the temperature / humidity KA * of the target mixed air, and in the separate structure, the temperature / humidity RA of the return air. Let ET = 1 ° C, 5 ° C, and 10 ° C be the intersections of the straight line and the saturation line H with different sensible heat ratios SHF. In FIG. 28, the horizontal axis represents the evaporation temperature, and in FIG. 28, the vertical axis represents (a) the sensible heat ratio and (b) the coefficient of performance COP of the air conditioner. From (a) of FIG. 28, as the indoor heat exchanger temperature decreases, there is no difference in the sensible heat ratio below that value. On the other hand, from (b), if the indoor heat exchanger temperature ET is lowered, the coefficient of performance COP is proportionately lowered and the capacity is lowered. Therefore, even if the lower limit value of the indoor heat exchanger temperature ET is lowered below about 5 ° C. as shown in the figure, the effect of obtaining energy reduction is lost. Therefore, the saturated lower limit value of about 5 ° C. is adopted. That is, the straight line drawn from point P in FIG. 27 to ET becomes a contact point at the point of ET = 1, and if it falls below that, SHF will rise. In the present invention, first, the target value of the temperature and humidity of the air that is circulated in the room in order to obtain the indoor load, for example, the blowout air of the air conditioner in the case of an integral type, It was set. Secondly, based on the temperature and humidity of each air including the outside air, the evaporation temperature that reduces the enthalpy difference between the air directly sucked into the indoor heat exchanger and the blown air, that is, reduces the energy of the refrigeration cycle. Seeking ET. However, at this time, it has been explained that the control is performed according to which zone the outside air temperature is in relation to the temperature of each indoor air. In the calculation for calculating SFHmin as in zones (1) and (2), if the saturation value described above is used from the beginning, for example, if this fixed lower limit value such as 5 ° C. is used, the point in contact with the saturation line H is determined. There is no need to obtain it, and control becomes easier. Whether this control is integrated ventilation control or separate ventilation control, it is related to the ratio of the air volume to be ventilated if the dehumidifying operation is necessary depending on the area where the air conditioner is located, the indoor conditions, or the operation requirements. First of all, the idea is to perform full dehumidification with the indoor heat exchanger, that is, to perform the SFHmin operation. Control is easy and efficient operation can be performed.

Furthermore, for such a combination of air conditioner and ventilator, whether it is integrated ventilation control or separate ventilation control, dehumidification is necessary when a hot and humid condition exists, and a simpler fixed value was used. Control can be performed. As described above, in the case of integrated ventilation control, if the enthalpy iOA of the outside air is smaller than the enthalpy iRA of the return air, the outside air is introduced by the outside air introducing means. In the case of separate ventilation control, if the enthalpy iOA of the outside air is smaller than the enthalpy iOA of the mixed air obtained by mixing the air blown from the air conditioner and the outside air, the outside air is introduced by the outside air introducing means. When calculating the enthalpy difference for the introduction of the outside air, effective dehumidification can be performed even if it is not a strict numerical value. That is, regardless of the combination of the air conditioner and the ventilator, the relationship between the temperature / humidity iRA of the indoor air of the return air returning to the air conditioner and the enthalpy iOA of the outside air is assumed to be iRA-iOA <α. This explanation is shown in FIG. In the air diagram of FIG. 29, φ indicates the relative humidity at each temperature. The temperature and humidity of the indoor air is RA, and the temperature and humidity of the outside air is OA. The enthalpy difference is obtained, and it is detected that iRA−iOA <α as shown in FIG. As a result, a fan with a constant fan speed is operated, and from the relationship between the air volume of the outside air and the air volume of the room air at this time, the heat exchanger is calculated from the air volume ratio to the line between the temperature and humidity of the room air and the temperature and humidity of the outside air. The temperature / humidity K of the air directly sucked into is set. The intersection between the line connecting the point K and the fixed evaporation temperature of 5 ° C. and the target indoor temperature Tt becomes the target temperature / humidity t, and is controlled to this value. As a result, the difference between the enthalpy it between the enthalpy iK and the target temperature / humidity t at the K point is smaller than the difference between the enthalpy it between the indoor temperature / humidity enthalpy iRA and the target temperature / humidity t. It becomes. In this way, simple control is performed such that dehumidification is performed when the target temperature is reached only by operating the ventilation fan under the condition of iRA-iOA <α.

  In the above description, the heating unit 4 has a heater. However, the heating unit 4 is not limited to a heater as long as it can heat air, for example, about several degrees Celsius to 20 degrees Celsius. FIG. 30 is an explanatory diagram showing an example of the configuration of what is generally referred to as a reheating method as a heating means and heats air by heat exchange with a refrigerant. In the figure, 3a and 3b are two indoor heat exchangers, and 26b is an expansion valve which is a pressure reducing means different from the expansion valve placed in the outdoor unit 8 of the refrigeration cycle.

  In the figure, for example, in the cooling operation of the first embodiment, the outside air temperature humidity is in the zone (1) or (2) region, and the vector extension line from the return air temperature humidity RA to the target blowing air temperature humidity SA * Refrigeration cycle when the air temperature does not cross the saturation line, or when the outside air temperature humidity is in the zone (3) region and the extension line of the vector from the outside air temperature humidity OA3 to the target blowing air temperature humidity SA * does not cross the saturation line Therefore, it was impossible to achieve the target blowing air temperature and humidity SA *. At this time, by the refrigeration cycle, the humidity is matched with the target to provide the outlet side air having a low temperature, and this air can be heated to realize the target blown air temperature and humidity SA *. As shown in FIG. 30, two indoor heat exchangers 3a and 3b are provided, and one indoor heat exchanger 3a is operated as a condenser and the other indoor heat exchanger 3b is operated as an evaporator. The indoor heat exchanger 3b that operates as an evaporator is disposed on the upstream side of the air flow path, for example, and the indoor heat exchanger 3a that operates as a condenser is disposed on the downstream side of the air flow path, for example. An expansion valve 26b is provided between the two indoor heat exchangers 3a and 3b.

  Hereinafter, the operation during the cooling operation of the refrigeration cycle shown in FIG. 30 will be described. The high-pressure gas refrigerant compressed by the compressor flows from the discharge port of the compressor to the outdoor heat exchanger through the four-way valve, and radiates heat to the outside air blown by the outdoor fan. Then, the refrigerant condenses and becomes high-pressure liquid refrigerant and flows out of the outdoor heat exchanger. Thereafter, the pressure is reduced to an intermediate pressure by an expansion valve 26 provided in the outdoor unit, becomes a partial gas, flows through the refrigerant pipe, and flows into the indoor heat exchanger 3a of the indoor unit 1. The refrigerant further condenses in the indoor heat exchanger 3a and heats the air flowing around the refrigerant pipe of the indoor heat exchanger 3a. Thereafter, the refrigerant flowing out of the indoor heat exchanger 3a is decompressed to a low pressure by the expansion valve 26b, and becomes a low-pressure two-phase refrigerant. Further, the low-pressure two-phase refrigerant flows into the indoor heat exchanger 3b, and heat is exchanged with the air flowing around when the heat is collected and evaporated, thereby cooling and dehumidifying the indoor air. Then, the refrigerant flows out from the indoor heat exchanger 3b as a low-pressure gas refrigerant, then flows through the refrigerant pipe 7 to the outdoor unit 8, and returns to the compressor inlet via the four-way valve 22. By such an operation, the indoor heat exchanger 3a becomes a heating means, and cold heat is obtained in the indoor heat exchanger 3b.

  By using such a reheating type heating means, even if a flammable refrigerant such as hydrocarbon or R290 is used as the refrigerant of the air conditioner, the refrigerant does not burn and a safe air conditioner is obtained. be able to. In recent years, from the viewpoint of global environmental conservation, there is an increasing demand for using a refrigerant that does not destroy the ozone layer and has a global warming potential of zero. R290 satisfies this condition, but the problem is that its property is flammable. If configured as in the present embodiment, fresh air can be used actively and effectively, energy saving, good for health, and can be used safely even with a flammable refrigerant. A device is obtained. In the present invention, the heat exchanger for heating, cooling, humidifying, or dehumidifying the air circulated by the blower is provided in the refrigerant cycle for circulating the refrigerant as described above, and the temperature of the air and the amount of water vapor component in the air It may be a heat exchanger that can change the temperature, or it may be a simple heater such as an oil heater that can change only the temperature of air, or an adsorption type that can mainly change the water vapor component in the air. It is clear that the present invention can be realized even when a dehumidifier or a combination of these is provided with a plurality of types of devices that affect the temperature and humidity of the air circulating in the room.

  FIG. 31 is a diagram for explaining an air conditioner. In the ceiling 20, air sucked from a suction grill 35 is provided to another place via a duct 48. A ceiling-embedded ventilation fan 46 for taking in outside air through the machine 1 and the duct 36 is provided. In this way, the air conditioner can be provided with an auxiliary grill, a circulation blower, or the like via a duct, and the air conditioned by one air conditioner can be blown to other places in the room or the room in Hotaka. As a method of circulating the temperature-controlled air in the room, there is a method of operating a fan in a room where an air conditioner exists, but the effect of cooling and heating is limited to circulation using partial air in the room. Although it is limited and it is not effective in a wide range or it can not be performed in another room together, the device of the present invention is effective for the temperature adjusted air to the necessary place with a circulation fan etc. through the duct In addition, it can be circulated with low noise. Air conditioning of another room and temperature control of multiple rooms and hallways can be performed with simple equipment through the duct. As a matter of course, the air conditioning in each room may be performed by adjusting the humidity according to the present invention to adjust the humidity. Furthermore, even if a humidifier 50 or a heater 51 that affects the temperature and humidity of the indoor air is provided in the room, the control based on the enthalpy or the like can be controlled only by increasing the number of temperature and humidity of the air to be detected and controlled. Can be done.

  The present invention changes the temperature or humidity of an indoor air by cooling or heating the indoor air with an air conditioner and performs indoor air conditioning so as to approach the target temperature and humidity. The amount of outside air introduced based on the temperature and humidity of the outside air, the temperature and humidity of the room air, and the target value of the room air, that is, the outside air is introduced by the outside air introduction means capable of adjusting the amount of air introduced. Therefore, it is possible to perform air conditioning so as to obtain a comfortable indoor space by introducing outside air according to the outdoor air condition and effectively using the outside air.

  In addition, the present invention introduces the outside air according to the outdoor air condition by closing the outside air introduction means and minimizing the amount of outside air introduced when the outside air enthalpy is larger than the indoor air enthalpy. Air conditioning can be performed so that a comfortable indoor space can be obtained by using it, and further energy saving can be realized without wasteful work.

  Further, the present invention is such that the enthalpy of the outside air is smaller than the enthalpy of the indoor air, and the temperature and humidity of the outside air are lower than the extension line of the change from the temperature and humidity of the indoor air to the target value. In some cases, the amount of outside air introduced is set so that the amount of change in humidity relative to the amount of change in temperature when the temperature and humidity of the mixed air that is a mixture of outside air and room air is approached to the target temperature and humidity. By adjusting, air can be conditioned to obtain a comfortable indoor space by introducing outside air according to the outdoor air condition and effectively using it, saving energy without unnecessary work Can be realized.

  Further, according to the present invention, the enthalpy of the outside air is smaller than the enthalpy of the room air, and the temperature and humidity of the outside air are lower than the extension line of the change from the temperature and humidity of the room air to the target value. In this case, the amount of outside air introduced is adjusted so that the amount of change in humidity with respect to the amount of change in temperature is reduced when approaching the target temperature and humidity from the temperature and humidity of the mixed air that is a mixture of outside air and room air. By doing this, air can be conditioned so that a comfortable indoor space can be obtained by introducing the outside air according to the outdoor air condition and effectively using this, and energy saving can be achieved without doing unnecessary work. realizable.

  The present invention also relates to an indoor heat exchanger that changes the temperature and humidity of the intake air by exchanging heat or cold and the intake air that has been transported by the heat transport means, and the indoor heat exchanger. An indoor fan that blows out air after heat exchange into the room as outside air, an outside air introducing means for introducing outside air from the outside, an outside air temperature detecting means for detecting the temperature of the outside air, and an outside air humidity detecting means for detecting the humidity of the outside air The indoor air temperature detecting means for detecting the temperature of the indoor air, the indoor humidity detecting means for detecting the humidity of the indoor air, the indoor air conditioning load detecting means for detecting the air conditioning load of the room, and the temperature and humidity of the outside air. Obtained from the outdoor air condition, the indoor air condition obtained from the temperature and humidity of the room air, the indoor air conditioning load obtained by the indoor air conditioning load detection means, the target indoor air temperature and the target indoor air humidity. The target indoor air condition, the outside air condition, the indoor air condition, the indoor air conditioning load, the amount of outside air introduced into the room based on the target indoor air condition, the temperature between the intake air and the blown air in the indoor heat exchanger, and Driving operation setting means that sets the amount of change in humidity, outside air amount control means that controls the outside air introduction means so that the outside air introduction amount set by the driving action setting means becomes equal, and intake air that is set by the driving action setting means Equipped with an operation control means that controls the operation of the heat transport means to obtain the amount of change in temperature and humidity between the blown air and effectively introduces the outside air according to the outdoor air condition. Air conditioning can be performed so as to obtain a comfortable indoor space.

  Further, the present invention provides a driving operation setting means, wherein the outside air enthalpy obtained from the outside air temperature detected by the outside air temperature detecting means and the outside air humidity detected by the outside air humidity detecting means is the room air temperature detected by the indoor air temperature detecting means and the indoor air temperature. By setting the outside air to be introduced when it is smaller than the indoor air enthalpy obtained from the indoor air humidity detected by the air humidity detection means, the outside air is introduced according to the outdoor air condition and used effectively. Air conditioning can be performed so that a comfortable indoor space can be obtained, and further energy saving can be realized without performing useless work.

  Further, the present invention is an operation setting means for introducing outside air mainly when the temperature and humidity of the outside air is lower than the line connecting the room air temperature and the target room air temperature in the wet air diagram. By reducing the temperature of the indoor air and setting it to reduce the humidity of the indoor air mainly by exchanging heat with the refrigerant in the indoor heat exchanger, the outside air is introduced according to the outdoor air condition and this is effective. Air conditioning can be performed so that a comfortable indoor space can be used by using the system and energy can be saved without doing unnecessary work.

  Further, the present invention is an operation operation setting means for introducing outdoor air mainly when the temperature and humidity of the outside air is lower than the line connecting the room air temperature and the target room temperature and humidity in the wet air diagram. By reducing the humidity of the air and setting it to lower the temperature of the indoor air mainly by heat exchange with the refrigerant in the indoor heat exchanger, the outside air is introduced according to the outdoor air condition and this is effective. Air conditioning can be performed so that a comfortable indoor space can be obtained by using it, and further energy saving can be realized without wasteful work.

  In addition, the present invention is provided in the air flow path on the downstream side of the indoor heat exchanger, and has heating means for heating the air flowing out from the indoor heat exchanger, thereby introducing outside air according to the outdoor air condition. Thus, it is possible to perform air conditioning so as to obtain a comfortable indoor space by effectively using this, and it is possible to obtain an air conditioning apparatus capable of realizing energy saving without performing useless work.

  Further, according to the present invention, the heating means heats the air by heat exchange with a heater or a refrigerant, so that the outside air is introduced according to the outdoor air condition and is used effectively to provide a comfortable room. Air conditioning can be performed so as to obtain space, and energy saving can be realized without unnecessary work.

  Further, the present invention has an outside air introduction means having at least an outside air inlet opening / closing mechanism, and the outside air introduction amount is controlled by opening / closing the outside air introduction opening / closing mechanism or by adjusting the opening degree of the outside air introduction opening / closing mechanism. Because it is variable, air can be conditioned in order to obtain a comfortable indoor space by introducing outside air according to the outdoor air condition and effectively using this, and more precise control realizes energy saving it can.

  Further, the present invention includes a refrigeration cycle in which the heat transport means is connected to the compressor, the heat source side heat exchanger, the decompression means, and the use side heat exchanger by a refrigerant pipe to circulate the refrigerant, and the indoor heat exchanger is used as described above. By configuring the side heat exchanger to transport cold or hot heat to the indoor heat exchanger by the refrigerant flowing through the refrigerant pipe, or by using a heat exchanger that is different from the use side heat exchanger. By configuring and having a circulation path for transporting cold or hot heat in the use-side heat exchanger to the other heat exchanger, the existing air-efficient refrigeration cycle is used, and the outdoor air condition Accordingly, it is possible to perform air conditioning so as to obtain a comfortable indoor space by introducing outside air and effectively using the outside air.

  Further, according to the present invention, on the wet air diagram, the temperature and humidity air that changes between the temperature and humidity of the outside air and the temperature and humidity of the room air according to the introduction amount of the outside air is set as the intake air and is set as the target blowing air. The temperature / humidity air is blown air, the change in temperature / humidity from the intake air to the blown air is used as the control vector, and the extension of the control vector reaches the temperature / humidity of the saturation line in the range that is restricted from the allowable range of the refrigerant temperature. By setting the temperature / humidity of the intake air and the refrigerant temperature within the allowable range, outside air can be introduced and used effectively according to the outdoor air condition, and air conditioning when actively using outside air In controlling the apparatus, there is obtained a control method for an air conditioner capable of performing air conditioning so as to obtain a comfortable indoor space by relating air humidity with air temperature.

  The present invention also provides the temperature and humidity of the intake air so that the extension of the control vector reaches the temperature and humidity of the saturation line in a range that is limited from the allowable range of the refrigerant temperature and the input of the air conditioner is minimized. By setting the refrigerant temperature within an allowable range, outside air can be introduced and used effectively according to the outdoor air condition, and further energy saving can be realized.

  In addition, the present invention introduces outside air according to the outdoor air condition by setting the temperature and humidity of the suction air so that the enthalpy of the suction air is equal to or less than the enthalpy of the room air and controlling the amount of outside air introduced. The air conditioning can be performed so as to obtain a comfortable indoor space by effectively utilizing the energy saving, and further energy saving can be realized without performing unnecessary work.

  Further, according to the present invention, in the case where the temperature and humidity of the outside air is in a region lower than the extension line of the temperature and humidity change from the indoor air to the target blowing air, the temperature of the intake air approaches the temperature of the target blowing air. Or, by controlling the introduction amount of the outside air so that the inclination of the control vector becomes large, the outside air is introduced according to the outdoor air condition and effectively used to obtain a comfortable indoor space. Harmonization can be achieved, and further energy saving can be realized without wasteful work.

  Further, according to the present invention, in the case where the temperature and humidity of the outside air is in a region on the lower humidity side than the extension line of the temperature and humidity change from the room air to the target blown air, the humidity of the intake air approaches the humidity of the target blown air. Or, by controlling the amount of outside air introduced so that the inclination of the control vector becomes small, the outside air is introduced according to the outdoor air condition and effectively used to obtain a comfortable indoor space. Harmonization can be achieved, and further energy saving can be realized without wasteful work.

  Further, according to the present invention, on the wet air diagram, the temperature and humidity air that changes between the temperature and humidity of the outside air and the temperature and humidity of the room air according to the amount of the outside air is taken as the intake air, and the temperature set as the target blown air. If the extension of temperature / humidity change from the intake air to the blowout air deviates from the saturation line temperature / humidity in the range restricted from the allowable range of the refrigerant temperature when the humidity air is used as the blowout air, the humidity of the blowout air When air with the same level of humidity as the target value is used as the blown air, the change in temperature and humidity from the intake air to the blown air is used as the control vector, and saturation of the range in which the extension of the control vector is limited from the allowable range of the refrigerant temperature Set the temperature and humidity of the intake air and the refrigerant temperature within the allowable range so that the temperature and humidity of the wire are reached, and if the temperature of the blown air is lower than the temperature of the target blown air, heat it to the target blown air temperature In addition, by setting the amount of heating, outside air can be introduced and used effectively according to the outdoor air condition, and when controlling the air conditioner when actively using the outside air, the air humidity as well as the air temperature It is possible to perform air conditioning so as to obtain a comfortable indoor space by relating them.

  The present invention also provides the temperature and humidity of the intake air so that the extension of the control vector reaches the temperature and humidity of the saturation line in a range limited from the allowable range of the refrigerant temperature and the input of the air conditioner is minimized. By setting the refrigerant temperature within an allowable range, outside air can be introduced and used effectively according to the outdoor air condition, and further energy saving can be realized.

  Further, the present invention changes the temperature / humidity of the intake air between the temperature / humidity of the outside air and the temperature / humidity of the room air, or changes the temperature of the blown air at the same level as the humidity of the target blown air. By setting the control vector so that the total amount of energy between the air conditioning capacity and the heating amount, which is the length of the air, is reduced, outside air can be introduced and used effectively according to the outdoor air condition, and wasteful work can be done. Energy saving can be realized without doing.

  Further, the present invention sets the introduction amount of the outside air according to the area of the outside air where the enthalpy of the outside air is larger than the enthalpy of the room air and the area of the outside air where the enthalpy of the outside air is smaller than the enthalpy of the room air. The outdoor air can be introduced and used effectively according to the outdoor air condition, and the indoor air can be comfortably related to the air humidity together with the air temperature when controlling the air conditioner when actively using the outdoor air. Air conditioning can be performed to obtain space, and it is easy to control.

  The present invention also provides a region where the temperature and humidity of the outside air are on a lower temperature side than the extension line of the temperature and humidity change from the room air to the target blowing air, and the temperature and humidity of the outside air are the temperature and humidity of the room air to the target blowing air. By setting the air-conditioning capacity of the refrigeration cycle according to the area that is on the low-humidity side of the extended line of change, the outside air is introduced according to the outdoor air condition and is used effectively Air conditioning can be performed to obtain a comfortable indoor space, and further energy saving can be realized without wasteful work.

  In addition, the present invention provides an outside air region in which the enthalpy of the outside air is larger than the enthalpy of the room air, the enthalpy of the outside air is smaller than the enthalpy of the room air, and the temperature and humidity of the outside air is the temperature / humidity of the room air to the target blowing air. The region that is on the lower temperature side of the extended line of change, the enthalpy of the outside air is smaller than the enthalpy of the room air, and the temperature and humidity of the outside air are lower than the extended line of the temperature and humidity change from the room air to the target blown air By setting the amount of outside air introduced, the air conditioning capacity of the refrigeration cycle, and the refrigerant temperature according to the three areas, the outside air is introduced according to the outdoor air condition and used effectively. Air conditioning can be performed to obtain a comfortable and comfortable indoor space, and energy saving can be realized without wasteful work.

  In addition, although the present invention has been described as performing reheating using a heater or a heat exchanger of a refrigeration cycle as described above, the detected value is further simplified in the operation method described in FIG. For example, dehumidification can be effectively performed by lowering by about −2 ° C. First, as a sensor, two points of the outside air temperature TOA and the return air suction temperature TRA are actually measured. In order to obtain the enthalpy iOA at the temperature and humidity of the outside air, the humidity of the outside air is required, but this is obtained by calculation as an outside air humidity detecting means. For example, the average relative humidity can be stored in the microcomputer from the annual weather data frequency table. Further, in order to increase the accuracy of the humidity value, the temperature and humidity data of the standard weather data may be used as the outside air humidity so that φOA = φ (TOA). That is, the value obtained by changing the average value of the outside air humidity according to the detected outside air temperature is taken as the outside air humidity, the outside air temperature and humidity can be obtained, and the outside air enthalpy iOA = f (TOA, φOA) can be calculated.

  Next, the humidity of the suction air is set to a target humidity, for example, 60% relative humidity. The temperature and humidity of the intake air are calculated by replacing the detected intake temperature TRA and the target humidity with the detected humidity of the intake air, and the enthalpy iRA = f (TRA, 60%) of the intake air can be calculated. As described above with reference to FIG. 29, the outside air temperature sensor, the intake air temperature sensor, the outside air humidity calculation means, the intake air humidity calculation means, and the enthalpy obtained by the outside air enthalpy calculation means and the intake air enthalpy calculation means, as described in FIG. The iRA-iOA <α determination means generates a signal for operating the ventilation fan when this condition is satisfied. As a result, by using a simple detection sensor, the target temperature and the target humidity are set, the enthalpy is calculated from the temperature and humidity of the outside air and the intake air, and the air conditioning means and the ventilation means are controlled by this enthalpy by the control means. When the air conditioner is operated to the set temperature and reaches the target temperature, dehumidification based on the temperature and humidity data can be performed as described with reference to FIG. In addition, effective dehumidification using outside air can be performed together, air conditioning of temperature and humidity can be performed with less energy using an air conditioner and a ventilation fan, and a simple device for comfortable indoor air condition And it can be done efficiently with simple control.

  As described above, according to the present invention, the room has a suction port and a blowout port, and the temperature and humidity of the indoor air that is circulated by sucking the indoor air from the suction port and blowing out from the blowout port by a blower are changed. Air conditioning means for performing air conditioning, ventilation means having an opening for introducing outside air into the room from the outside or exhausting air from the room to the outside, an opening / closing means for opening and closing the opening, or a ventilation adjusting means for adjusting the amount of ventilation; and ventilation Outside temperature detecting means for detecting the temperature of the outside air introduced from the means, outside air humidity detecting means for detecting the humidity of the outside air introduced from the ventilation means, and suction temperature for detecting the temperature of the air sucked into the air conditioning means from the room A detection means, an indoor heat exchanger temperature detection means for detecting the indoor heat exchanger temperature of the air conditioning means, and an indoor temperature detection means for detecting the temperature of the air circulating in the room At least one of the outside air temperature detecting means, the outside air humidity detecting means, the suction temperature detecting means, and the air conditioning means according to the temperature and humidity detected from at least one of the indoor heat exchanger temperature detecting means and the indoor temperature detecting means, and Control means for controlling the ventilation means, and the temperature of the room air is made to approach the target temperature, so that the outside air can be used effectively and an air conditioner with reduced energy during operation can be obtained. .

  In addition, according to the present invention, the air conditioner has an air inlet and an air outlet, and changes the temperature and humidity of the indoor air that is circulated by sucking the indoor air from the air inlet and blowing out the air through the air outlet. An air conditioning means for performing air conditioning, an opening for introducing outside air into the room from the outside or exhausting air from the room to the outside, a ventilation means having an opening / closing means for opening and closing the opening or a ventilation adjusting means for adjusting the amount of ventilation, and a ventilation means An outside air temperature detecting means for detecting the temperature of the introduced outside air, an outside air humidity detecting means for detecting the humidity of the outside air introduced from the ventilation means, and a suction temperature detecting means for detecting the temperature of the air sucked into the air conditioning means from the room A suction humidity detecting means for detecting the humidity of air sucked from the room into the air conditioning means, a room temperature detecting means for detecting the temperature of the air circulating in the room, Indoor humidity detection means for detecting the humidity of the air circulating inside, outside temperature detection means, outside air humidity detection means, suction temperature detection means, suction humidity detection means, room temperature detection means, and temperature detected by the room humidity detection means And control means for controlling the air conditioning means and the ventilation means according to the humidity, so that the temperature and humidity of the indoor air are brought close to the target values of temperature and humidity. Air conditioning can be achieved with less energy.

  Further, according to the present invention, since the control means controls the detected air temperature and humidity in relation to each other, an air conditioner capable of efficiently controlling the temperature and humidity simultaneously is obtained.

  According to the present invention, at least one of the indoor temperature detection means for detecting the temperature of the air circulating in the room and the indoor humidity detection means for detecting the humidity of the air circulating in the room is in the vicinity of the outlet. Since at least one of the temperature and humidity of the air circulating in the room is detected, an air conditioner capable of reliable control is obtained.

  Further, according to the present invention, at least one of the indoor temperature detection means for detecting the temperature of the air circulating in the room and the indoor humidity detection means for detecting the humidity of the air circulating in the room is provided by the ventilation means. Since at least one of the temperature and humidity of the mixed air of the introduced air and the air blown from the blowout port is detected, an air conditioner capable of reliable control is obtained.

  In addition, according to the present invention, the air conditioner that can easily maintain a good indoor environment can be obtained because it includes the air blowing means that can perform both ventilation from the outside to the room and exhaust from the room to the outside.

  Further, according to the present invention, since the ventilation means is a ventilation fan that can exchange heat, an air conditioner that can achieve further energy saving is obtained.

  Further, according to the present invention, the indoor air is circulated in the air conditioner having an air inlet and an air outlet in the room, and the room air is sucked from the air inlet by the blower and blown out from the air outlet. A step of performing air conditioning by changing the pressure, an opening for introducing outside air into the room from the outside or exhausting air from the room to the outside, an opening / closing means for opening / closing the opening, or a ventilation adjusting means for adjusting the amount of ventilation through the opening A step of ventilating between the outside and the outside by a ventilation means having a temperature of outside air, a humidity of outside air, a temperature of air sucked into the air conditioner from the room, and an indoor heat exchanger of the air conditioner Detecting the temperature or the temperature of the air circulating in the room, and controlling the air conditioning means and the ventilation means according to the detected temperature and humidity to control the temperature of the room air. Fine humidity so as to approach the temperature and humidity which is a target value, so changing the temperature and humidity integrally effectively be utilized outside air, less air conditioning method with energy at the time of operation is obtained.

  According to the present invention, the step of obtaining the enthalpy of the outside air and the enthalpy of the air sucked into the air conditioner from the room and comparing both enthalpies, and the enthalpy of the outside air being lower than the enthalpy of the air sucked into the air conditioner from the room Has a step of introducing outside air into the room by a ventilation means and operating the refrigeration cycle under a predetermined condition, so that an air conditioning method with less energy can be obtained by a simple method.

  Further, according to the present invention, the step of obtaining the enthalpy of the air circulating into the room and the enthalpy of the air sucked into the air conditioner from the room to obtain the room load from both enthalpies, and the temperature and humidity of the room load and the room air are determined. The step of obtaining the temperature and humidity of the air circulated in the target room from the target value and the temperature and humidity of the air sucked into the air conditioner from the room; And the step of operating under conditions, an air conditioning method capable of effective energy-saving operation using outside air is obtained.

  Further, according to the present invention, there is provided a step of detecting the temperature and humidity of the air sucked by an air conditioner that has a suction port in the room and sucks room air from the suction port by a blower and performs air conditioning, Detecting the temperature and humidity of the air that is blown out from the outlet to be circulated into the room, detecting the temperature and humidity of the outside air that introduces the outside air from the outside into the room, and the temperature that is the target value of the indoor air; In order to achieve the target value of the indoor air and the step of setting the humidity, and to reduce the energy of the refrigeration cycle, the target value of the temperature and humidity of the air mixed with the indoor air and the outside air directly sucked into the indoor heat exchanger is set. And the step of setting the air conditioning method with high reliability and low energy.

  Further, according to the present invention, there is provided a step of detecting the temperature and humidity of the air sucked by an air conditioner that has a suction port in the room and sucks room air from the suction port by a blower and performs air conditioning, Detecting the temperature, humidity, and air volume of the air that is blown out from the air outlet and circulated into the room, detecting the temperature, humidity, and air volume of the outside air that introduces the outside air from the outside into the room, and a target value of the indoor air The step of setting the temperature and humidity, and the step of setting the target value of the temperature and humidity of the air directly blown from the indoor heat exchanger in order to achieve the target value of the indoor air and reduce the energy of the refrigeration cycle Thus, an air conditioning method that is convenient and does not use wasteful energy can be obtained.

  According to the present invention, the evaporating temperature of the refrigeration cycle is set to a predetermined value, or the sensible heat ratio is set to a predetermined value, and the air conditioner is operated. An air conditioning method capable of reliably controlling and achieving energy saving can be obtained.

  Further, according to the present invention, the refrigeration cycle is operated so that the difference in enthalpy between the temperature and humidity of air directly sucked into the indoor heat exchanger and the temperature and humidity of air blown directly from the indoor heat exchanger is reduced. Therefore, an air conditioning method that can reliably achieve energy saving is obtained. .

  Further, according to the present invention, the indoor heat exchanger has a suction port and a blowout port in the room, and changes the temperature and humidity of the indoor air that is sucked from the suction port by the blower and blown from the blowout port and circulated. Air conditioning means for performing air conditioning, and an opening for introducing outside air into the room from the outside or exhausting air from the room to the outside, an opening / closing means for opening and closing the opening, or a ventilation adjusting means for adjusting the amount of ventilation through the opening. A ventilation means, an outside air temperature detection means for detecting the temperature of the outside air introduced from the ventilation means, an outside air humidity detection means for detecting the humidity of the outside air introduced from the ventilation means, and the air conditioning means being sucked from the room Suction temperature detection means for detecting the temperature of air, indoor suction temperature setting means for setting a target temperature of indoor air, and indoor suction for setting a target humidity of indoor air Temperature control means for calculating the enthalpy from the temperature and humidity of the outside air and the intake air and controlling the air conditioning means and the ventilation means based on the calculated enthalpy, and the temperature of the room air is a target value. Therefore, it is possible to obtain an air conditioner that can achieve comfortable air conditioning and energy saving with a simple device.

  Further, according to the present invention, the room has an intake port and an air outlet, and the air is sucked from the air inlet through the rotation of the blower and blown out from the air outlet, so that the temperature and humidity in the room change depending on the capacity of the heat exchanger. Air conditioning means for performing operations such as cooling and heating, and connected to the air conditioning means, adjusting the rotation of the blower and the capacity of the heat exchanger to adjust the indoor temperature and humidity to at least the target temperature and humidity. The target value setting means that is set so as to approach one, and the target value that is set by the target value setting means is a zone consisting of a plurality of bands, and from a plurality of bands of target values according to the operating state of the air conditioning means Since the zone width can be selected, comfortable indoor air conditioning can be obtained.

  Further, according to the present invention, the room has an inlet and an outlet, and the air is sucked from the inlet by the rotation of the blower and blown out from the outlet, and the indoor temperature and humidity are controlled by the ability of the heat exchanger. Air conditioning means that performs operations such as cooling and heating by changing, ventilation means that has an opening that allows ventilation between the room and the outside, and a ventilation fan that performs this ventilation, and that ventilates the room, and air conditioning means and ventilation Control means connected to the means for adjusting the rotation of the blower and the capacity of the heat exchanger and the rotation of the ventilation fan to control the room temperature and humidity to approach the target temperature and humidity; and Air can be blown from the air conditioning means or the ventilation means to another place or another room via a duct, and the temperature and humidity are integrally controlled by the control means for the blowing means and the ventilation means. In, to allow for good air-conditioning efficiency in a lump a lot of places and your back of the room.

  DESCRIPTION OF SYMBOLS 1 Indoor unit, 2 rooms, 3, 3a, 3b Indoor heat exchanger, 4 Heating means, 5 Indoor fan, 6 Outside air introduction means, 7 Refrigerant piping, 8 Outdoor unit, 9 Indoor air temperature detection means which are intake air, 10 Indoor air humidity detection means that is intake air, 11 Outside air temperature detection means, 12 Outside air humidity detection means, 13 Blow air temperature detection means, 14 Blow air humidity detection means, 20 Ceiling, 21 Wall surface, 22 Compressor, 23 Channel switching Means, 25 outdoor heat exchanger, 26, 26b pressure reducing means, 31 ventilation fan, 32 indoor control device, 33 outdoor control device, 34 blowout grill, 35 suction grille, 36 duct, 39 indoor filter, 40 outdoor filter, 41 outdoor fan , 46 Ceiling embedded ventilation fan, 47 Floor, 50 Humidifier, 51 Heater, 52 Mixed air temperature detector, 53 Mixed air humidity detector, 67 Damper of outside air introducing means, 68 Indoor heat exchanger piping temperature detecting means, 81 Indoor air conditioning load detecting means, 82 Operation setting means, 83 Outside air amount control Means, 84 Driving operation control means.

Claims (3)

It has a suction port and a blowout port in the room, and the air is sucked from the suction port by the rotation of the blower and blown out from the blowout port, and the temperature or humidity of the room air is changed by a heat exchanger to An air conditioning means for operating, an opening for introducing outside air into the room from the outside or exhausting air from the room to the outside, an opening / closing means for opening / closing the opening, or a ventilation adjusting means for adjusting the amount of air flowing through the opening. A ventilation means, a refrigeration cycle that adjusts the physical state of the refrigerant flowing through the heat exchanger by an adjustable adjustment means such as a compressor and an expansion valve, and changes the capacity and operation of the heat exchanger, and the air conditioning means The temperature and humidity are connected to the ventilation means and the refrigeration cycle, and adjust the blower, the heat exchanger, the opening, and the like to set the indoor temperature or humidity as target values. Target value setting means for setting the target value to approach at least one, the target value set by the target value setting means is a zone consisting of a plurality of bands, and at least one of the indoor temperature and humidity is the target value An air conditioner that switches the operation of at least one of the air conditioning means, the ventilation means, and the refrigeration cycle when the target zone is reached or when a predetermined value in the zone is reached. The air conditioner according to claim 1, wherein when one of the target value of temperature and humidity reaches the target zone, the width of the other target zone is switched. The air conditioner according to claim 1, wherein the target zone or the predetermined value in the zone can be changed according to an outside air state or a stored seasonal calendar.

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