WO2019220631A1 - Unité intérieure pour climatiseur - Google Patents

Unité intérieure pour climatiseur Download PDF

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Publication number
WO2019220631A1
WO2019220631A1 PCT/JP2018/019327 JP2018019327W WO2019220631A1 WO 2019220631 A1 WO2019220631 A1 WO 2019220631A1 JP 2018019327 W JP2018019327 W JP 2018019327W WO 2019220631 A1 WO2019220631 A1 WO 2019220631A1
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WO
WIPO (PCT)
Prior art keywords
temperature
sensor
indoor unit
temperature calibration
unit
Prior art date
Application number
PCT/JP2018/019327
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English (en)
Japanese (ja)
Inventor
薦正 田辺
淳一 岡崎
弘志 ▲廣▼▲崎▼
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2018/019327 priority Critical patent/WO2019220631A1/fr
Priority to JP2020518931A priority patent/JP6921318B2/ja
Publication of WO2019220631A1 publication Critical patent/WO2019220631A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
    • G01J5/12—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using thermoelectric elements, e.g. thermocouples

Definitions

  • the present invention relates to an indoor unit of an air conditioner that performs indoor air conditioning.
  • an indoor unit of an air conditioner that detects a human body existing indoors using a sensor that measures temperature without contact has been proposed and put into practical use.
  • a sensor for detecting a human body for example, a temperature sensor such as an infrared sensor is used.
  • the purpose of such an indoor unit is to detect the temperature of the human body in the room and the room. For this reason, the indoor unit operates so as to detect a temperature in a preset front set range (see, for example, Patent Document 1).
  • the air conditioner erroneously detects that the human body does not exist even though the human body actually exists.
  • the air conditioner erroneously detects that a human body exists in a place where the human body does not actually exist. In other words, if the temperature in the space is erroneously detected, the air conditioner cannot perform its original function of detecting the presence of the human body, and various controls associated with human body detection such as applying airflow toward the human body Can not do.
  • the air conditioner cannot accurately grasp the indoor temperature state. Therefore, the air conditioner cannot perform optimum air conditioning control according to the indoor temperature.
  • the present invention has been made in view of the above-described conventional problems, and an object thereof is to provide an indoor unit of an air conditioner that can improve the detection accuracy of the indoor temperature.
  • An indoor unit of an air conditioner is an indoor unit of an air conditioner that sends conditioned air to an air conditioning target space, and scans a set range including the air conditioning target space, A sensor for detecting temperature, a temperature calibration member provided in a setting calibration range different from the setting range, driving of the sensor, and controlling the air flow of the conditioned air to be sent based on the detection result of the sensor A control device that drives the sensor toward the set calibration range so as to detect the temperature of the temperature calibration member, and sets the temperature of the temperature calibration member detected by the sensor. Based on this, temperature calibration of the sensor is performed.
  • the temperature of the temperature calibration member provided in the setting calibration range different from the setting range including the air conditioning target space is detected, and the sensor is based on the detection result.
  • the detection accuracy of the room temperature can be improved.
  • FIG. It is a perspective view which shows an example of the external appearance of the indoor unit which concerns on Embodiment 1.
  • FIG. It is the schematic which shows an example of a structure of the infrared sensor of FIG. It is the schematic which shows the 1st example of the positional relationship of an infrared sensor and a temperature calibration member. It is the schematic which shows the 2nd example of the positional relationship of an infrared sensor and a temperature calibration member. It is the schematic which shows the 3rd example of the positional relationship of an infrared sensor and a temperature calibration member. It is the schematic which shows the 4th example of the positional relationship of an infrared sensor and a temperature calibration member.
  • FIG. 4 is a flowchart illustrating an example of a flow of air conditioning processing by the air conditioner according to Embodiment 1. It is the schematic for demonstrating the relationship between the output value of an infrared sensor, and the temperature obtained. 4 is a flowchart illustrating an example of a flow of temperature calibration processing in the indoor unit according to Embodiment 1; It is a flowchart which shows an example of the necessity judgment of the temperature calibration in FIG.
  • Embodiment 1 FIG.
  • the indoor unit of the air conditioner according to Embodiment 1 acquires temperature information in a room that is an air-conditioning target space, and performs air conditioning based on the acquired temperature information.
  • FIG. 1 is a perspective view showing an example of the appearance of the indoor unit 10 according to the first embodiment.
  • the indoor unit 10 is, for example, a wall-hanging type indoor unit installed on an indoor wall surface.
  • the indoor unit 10 is provided with a suction port 1 and an air outlet 2 in a housing that forms an outer shell.
  • the suction port 1 is provided to suck the air around the indoor unit 10 into the interior.
  • the blower outlet 2 is provided in order to blow out the air sucked into the interior of the indoor unit 10 as conditioned air.
  • a blowout air passage that leads from the suction port 1 to the blowout port 2 is formed inside the indoor unit 10.
  • the upper and lower wind direction plates 3 are provided at the outlet 2.
  • a left / right airflow direction plate 4 is provided in the vicinity of the air outlet 2 on the air outlet in the indoor unit 10.
  • the up-and-down wind direction plate 3 is rotatably provided in order to adjust the vertical delivery direction when the conditioned air is blown out.
  • the left and right wind direction plates 4 are rotatably provided to adjust the horizontal delivery direction when the conditioned air is delivered.
  • the indoor unit 10 is provided with an infrared sensor 5.
  • the infrared sensor 5 scans the room temperature, detects infrared rays emitted from the surface of the object, and acquires temperature information.
  • the infrared sensor 5 is provided at the lower left portion when viewed from the indoor unit 10 side.
  • the installation position of the infrared sensor 5 is not limited to the position shown in FIG.
  • the infrared sensor 5 should just be installed in the position which can acquire indoor temperature information.
  • the shape of the infrared sensor 5 is not limited to the shape as shown in FIG. 1 and may be any shape as long as indoor temperature information can be acquired.
  • FIG. 2 is a schematic diagram showing an example of the configuration of the infrared sensor 5 of FIG. As shown in FIG. 2, a drive device 6 such as a stepping motor is attached to the infrared sensor 5.
  • the infrared sensor 5 is a thermopile sensor, for example, and detects the amount of infrared rays of the object and converts it into temperature information.
  • the infrared sensor 5 rotates when the driving device 6 is driven, and scans a preset setting range. Thereby, the infrared sensor 5 detects the temperature based on the amount of infrared rays within the set range and outputs it as temperature information.
  • the infrared sensor 5 and the driving device 6 are configured separately, but the configuration is not limited thereto, and may be configured integrally.
  • a temperature calibration member 7 used when performing temperature calibration of the infrared sensor 5 is provided in the vicinity of the infrared sensor 5.
  • the temperature calibration member 7 is provided in a range that is not included in the set range for normal temperature detection.
  • FIG. 3 is a schematic diagram showing a first example of the positional relationship between the infrared sensor 5 and the temperature calibration member 7.
  • the temperature calibration member 7 is provided in a set calibration range that is different from the set range for the infrared sensor 5 to scan the entire room.
  • the infrared sensor 5 rotates toward a set calibration range where the temperature calibration member 7 is provided. Thereby, the infrared sensor 5 can detect only the temperature of the temperature calibration member 7.
  • the temperature calibration member 7 may be provided perpendicular to the optical axis of the infrared sensor 5. This is to improve the accuracy of calibration by not reflecting infrared rays from other members.
  • FIG. 4 is a schematic diagram showing a second example of the positional relationship between the infrared sensor 5 and the temperature calibration member 7.
  • FIG. 4 shows a setting range of the infrared sensor 5 when the air-conditioning target space is viewed from the ceiling side.
  • a positioning member is provided in each of the infrared sensor 5 and the housing of the indoor unit 10, and the infrared sensor 5 when the respective positioning members are in contact with each other.
  • a temperature calibration member 7 may be provided in the field of view. In this case, the temperature calibration member 7 is provided in a region other than the setting range of the infrared sensor 5.
  • FIG. 5 is a schematic diagram showing a third example of the positional relationship between the infrared sensor 5 and the temperature calibration member 7.
  • the temperature calibration member 7 may be provided so as to surround a part of the periphery of the infrared sensor 5 that is a range different from the set range.
  • FIG. 6 is a schematic diagram showing a fourth example of the positional relationship between the infrared sensor 5 and the temperature calibration member 7.
  • the temperature calibration member 7 may have a spherical shape so that the distance from the infrared sensor 5 is constant in order to improve calibration accuracy.
  • FIG. 7 is a schematic diagram showing another example of the positional relationship between the infrared sensor 5 and the temperature calibration member 7.
  • a rack 8 is connected to the infrared sensor 5.
  • a spur gear 9 connected to the driving device 6 is provided on the rack 8.
  • the rack 8 moves up and down with the infrared sensor 5.
  • the temperature calibration member 7 is provided so as to cover a set range at a height different from that of the infrared sensor 5.
  • the infrared sensor 5 When temperature calibration is performed, the infrared sensor 5 is moved to a height at which the temperature calibration member 7 is provided when the driving device 6 is driven. Thereby, the infrared sensor 5 can detect only the temperature of the temperature calibration member 7.
  • the infrared sensor 5 when the infrared sensor 5 is driven up and down and stored in the indoor unit 10 when not in use, for example, the infrared sensor 5 is stored in the indoor unit 10. Temperature calibration may be performed. In this case, the temperature calibration member 7 is disposed in the indoor unit 10.
  • a setting calibration range different from the setting range for detecting the indoor temperature is set, and the temperature calibration member 7 is arranged in the setting calibration range.
  • the infrared sensor 5 is driven so as to go to the set calibration range. Thereby, the infrared sensor 5 detects only the temperature of the temperature calibration member 7 at the time of temperature calibration.
  • the temperature calibration member 7 may be formed as a part of the casing of the indoor unit 10, for example. Further, the temperature calibration member 7 may be formed by using a material having a low infrared reflectance or a material having a low infrared transmittance in order to improve calibration accuracy.
  • FIG. 8 is a schematic diagram illustrating an example of a circuit configuration of the air conditioner 100 using the indoor unit 10 according to the first embodiment.
  • the air conditioner 100 includes an indoor unit 10 and an outdoor unit 20.
  • the indoor unit 10 and the outdoor unit 20 are connected by a refrigerant pipe, and a refrigerant flows through the refrigerant pipe to form a refrigeration cycle.
  • FIG. 8 shows the case where one indoor unit 10 and one outdoor unit 20 are connected
  • the number of indoor units 10 and outdoor units 20 is not limited to this example.
  • a plurality of indoor units 10 may be connected to one outdoor unit 20.
  • one or a plurality of indoor units 10 may be connected to a plurality of outdoor units 20.
  • the indoor unit 10 includes an expansion valve 11, an indoor heat exchanger 12, an indoor blower 13, and an indoor control device 30, and each is housed in a casing of the indoor unit 10.
  • the expansion valve 11 expands the refrigerant.
  • the expansion valve 11 is configured by a valve capable of controlling the opening degree, such as an electronic expansion valve. The opening degree of the expansion valve 11 is controlled by the indoor control device 30.
  • the indoor heat exchanger 12 performs heat exchange between the indoor air and the refrigerant. Thereby, heating air or cooling air, which is conditioned air supplied to the indoor space, is generated.
  • the indoor heat exchanger 12 functions as an evaporator that cools the indoor air by the heat of vaporization when the refrigerant is evaporated during the cooling operation, and cools the air in the air-conditioning symmetrical space.
  • the indoor heat exchanger 12 functions as a condenser that radiates the heat of the refrigerant to the room air and condenses the refrigerant during the heating operation, and heats the air in the air-conditioning symmetric space to perform heating.
  • the indoor blower 13 generates an air flow from the inlet 1 to the outlet 2 and supplies indoor air to the indoor heat exchanger 12.
  • the rotational speed of the indoor blower 13 is controlled by the indoor control device 30. By controlling the number of rotations, the amount of air blown to the indoor heat exchanger 12 is adjusted.
  • the indoor control device 30 controls the overall operation of the indoor unit 10 based on, for example, settings made by a user operation on a remote controller (not shown) and temperature information from the infrared sensor 5.
  • the indoor control device 30 controls driving of the infrared sensor 5 when temperature information is acquired by the infrared sensor 5.
  • FIG. 9 is a block diagram showing an example of the configuration of the indoor control device 30 shown in FIG.
  • the indoor control device 30 includes an input circuit 31, an arithmetic processing device 32, a storage device 33, and an output circuit 34.
  • the input circuit 31 receives setting information from a remote controller, temperature information from the infrared sensor 5, control information from the outdoor control device 40, and the like.
  • the input circuit 31 outputs various input information to the arithmetic processing device 32.
  • the arithmetic processing device 32 is a microcomputer such as a CPU (Central Processing Unit), and implements various functions by executing software stored in the storage device 33.
  • the arithmetic processing unit 32 is not limited to this, and may be configured by hardware such as a circuit device that implements various functions.
  • the arithmetic processing device 32 performs various processes based on the information received from the input circuit 31 using the data stored in the storage device 33. For example, the arithmetic processing unit 32 creates a thermal image indicating the indoor temperature state based on the temperature information from the infrared sensor 5, detects a human body position in the room based on the created thermal image, and the like. I do. Details of such processing by the arithmetic processing unit 32 will be described later.
  • the arithmetic processing unit 32 generates control information for the operation device provided in the indoor unit 10 and control information for the outdoor unit 20 so as to send out conditioned air according to the detected position of the human body, and outputs an output circuit. 34.
  • the control information generated at this time includes, for example, information for controlling the air direction, information for controlling the air volume of the indoor blower 13, and information for controlling the opening degree of the expansion valve 11.
  • the storage device 33 stores programs and various data necessary for processing performed by the arithmetic processing device 32. Further, the storage device 33 stores data obtained by various processes in the arithmetic processing device 32.
  • the storage device 33 stores a thermal image when no human body is present in the room.
  • This thermal image is a thermal image serving as a reference used when the position of the human body in the room is detected by the arithmetic processing device 32 (hereinafter referred to as “reference thermal image” as appropriate).
  • the reference thermal image is created in advance by the arithmetic processing device 32 based on temperature information when it can be determined that no human body is present in the room, for example.
  • the storage device 33 stores an output correction coefficient and a correction formula used when temperature calibration of the infrared sensor 5 is performed. Details of the output correction coefficient and the correction formula will be described later.
  • the output circuit 34 receives various types of control information from the arithmetic processing unit 32 and outputs the control information to the operation device or the outdoor unit 20 provided in the corresponding indoor unit 10. For example, when control information for controlling the wind direction is received, the output circuit 34 outputs this control information to a driving device (not shown) for driving the up and down wind direction plate 3 and the left and right wind direction plate 4.
  • the output circuit 34 when control information for controlling the air volume is received, the output circuit 34 outputs this control information to a driving device (not shown) for driving the indoor blower 13. Further, for example, when control information for the outdoor unit 20 is received, the output circuit 34 outputs this control information to the outdoor control device 40 of the outdoor unit 20. Furthermore, the output circuit 34 outputs control information for the infrared sensor 5 or the temperature calibration member 7 when the temperature calibration of the infrared sensor 5 is performed.
  • FIG. 10 is a functional block diagram showing an example of the configuration of the arithmetic processing unit 32 shown in FIG.
  • the arithmetic processing unit 32 includes a temperature information acquisition unit 51, a temperature correction unit 52, a thermal image creation unit 53, an indoor detection unit 54, a sensory temperature calculation unit 55, a device control unit 56, and a temperature calibration determination unit. 57, a reference value determining unit 58, a correction coefficient determining unit 59, and a timer 60.
  • FIG. 10 only functional blocks for portions related to the features of the present invention are illustrated, and illustration and description of other portions are omitted.
  • the temperature information acquisition unit 51 acquires temperature information detected by the infrared sensor 5 via the input circuit 31.
  • the temperature correction unit 52 corrects the temperature information acquired by the temperature information acquisition unit 51 using the output correction coefficient and the correction formula stored in the storage device 33.
  • the output correction coefficient is for correcting temperature information when the temperature calibration of the infrared sensor 5 is performed.
  • the temperature correction unit 52 is obtained by using a correction formula to which the output correction coefficient is applied. Correct the temperature information.
  • the thermal image creation unit 53 creates a thermal image indicating the temperature distribution in the room based on the temperature information acquired by the temperature information acquisition unit 51.
  • the thermal image is created, for example, by arranging the temperature values obtained by scanning the room with the infrared sensor 5 at the coordinate positions at the time of scanning.
  • the indoor detection unit 54 detects the temperature of the structure forming the room such as a wall based on the thermal image created by the thermal image creation unit 53. Further, the thermal image creation unit 53 detects the presence or absence of a human body and the position of the human body in the room. The human body is detected by, for example, comparing the created thermal image with a reference thermal image stored in advance in the storage device 33 and extracting a portion where the temperature has changed. Further, the position of the human body in the room is detected based on the coordinates of the pixels of the human body image, which is an image extracted as the human body.
  • the sensory temperature calculation unit 55 calculates the sensory temperature at the position of the human body existing in the room detected by the indoor detection unit 54. At this time, the sensible temperature calculation unit 55 calculates the sensible temperature including the influence of radiation.
  • the device control unit 56 controls each device in the indoor unit 10 and the outdoor unit 20 based on the body temperature calculated by the body temperature calculating unit 55.
  • a control signal for each device in the indoor unit 10 is supplied to each device via the output circuit 34.
  • Control signals for each device in the outdoor unit 20 are supplied to the outdoor unit 20 via the output circuit 34.
  • the temperature calibration determination unit 57 determines whether or not temperature calibration is required for the infrared sensor 5 by a preset method. Whether or not temperature calibration is necessary is determined, for example, based on the length of time for energizing the infrared sensor 5.
  • the reference value determination unit 58 determines a reference value when the temperature calibration determination unit 57 determines that temperature calibration is necessary.
  • the reference value serves as a reference when performing temperature calibration. For example, when a temperature sensor is attached to the temperature calibration member 7, the temperature detected by the temperature sensor can be applied.
  • the reference value is not limited to this, and for example, a non-contact temperature sensor different from the infrared sensor 5 can be provided, and the temperature detected by the non-contact temperature sensor can be applied.
  • the reference value when the indoor air temperature is stable, the reference value may be a temperature detected by a temperature sensor that detects the intake air temperature of the indoor unit 10. Furthermore, when the infrared sensor 5 is a sensor that detects temperatures at a plurality of locations, the reference value is one of a plurality of output values, or a relative value of the detected temperature is eliminated, or A value based on the output value of the infrared sensor 5 such as an average value of a plurality of output values may be applied.
  • the correction coefficient determination unit 59 determines an output correction coefficient for correcting the output of the infrared sensor 5 based on the temperature information acquired by the temperature information acquisition unit 51 and the reference value determined by the reference value determination unit 58. To do.
  • the timer 60 performs time measurement necessary for performing various processes according to the first embodiment. In particular, when the necessity of temperature calibration is determined based on the length of the energization time for the infrared sensor 5, the timer 60 measures the energization time for the infrared sensor 5 based on the control of the temperature calibration determination unit 57.
  • the outdoor unit 20 in FIG. 8 includes a compressor 21, a refrigerant flow switching device 22, an outdoor heat exchanger 23, an outdoor blower 24, and an outdoor control device 40.
  • the compressor 21 sucks low-temperature and low-pressure refrigerant, compresses the sucked refrigerant, and discharges high-temperature and high-pressure refrigerant.
  • an inverter compressor or the like in which the capacity that is the refrigerant delivery amount per unit time is controlled by arbitrarily changing the operation frequency is used.
  • the operating frequency of the compressor 21 is controlled by the outdoor control device 40.
  • the refrigerant flow switching device 22 is, for example, a four-way valve, and switches between a cooling operation and a heating operation by switching the direction in which the refrigerant flows.
  • the refrigerant flow switching device 22 is switched to the state shown by the solid line in FIG. 8 during the cooling operation.
  • coolant flow path switching apparatus 22 switches to the state shown with the dotted line of FIG. 8 at the time of heating operation.
  • Channel switching in the refrigerant channel switching device 22 is controlled by the outdoor control device 40.
  • the refrigerant flow switching device 22 is not limited to the four-way valve described above, and other valves may be used in combination, for example.
  • the outdoor heat exchanger 23 performs heat exchange between the outdoor air and the refrigerant. Specifically, the outdoor heat exchanger 23 functions as a condenser during the cooling operation. The outdoor heat exchanger 23 functions as an evaporator during the heating operation. The outdoor blower 24 supplies outdoor air to the outdoor heat exchanger 23. The rotational speed of the outdoor blower 24 is controlled by the outdoor control device 40. By controlling the number of rotations, the amount of air blown to the outdoor heat exchanger 23 is adjusted.
  • the outdoor control device 40 controls the overall operation of the outdoor unit 20 based on various information received from each part of the outdoor unit 20. Specifically, the outdoor control device 40 switches the operation frequency of the compressor 21 and the refrigerant flow path switching based on control information from the indoor control device 30 and information from various sensors (not shown) provided in the refrigeration cycle. The flow path of the device 22 is switched and the rotational speed of the outdoor blower 24 is controlled.
  • FIG. 11 is a block diagram showing an example of the configuration of the outdoor control device 40 shown in FIG. As shown in FIG. 11, the outdoor control device 40 includes an input circuit 41, an arithmetic processing device 42, a storage device 43, and an output circuit 44.
  • the input circuit 41 receives control information from the indoor control device 30, information acquired by various sensors (not shown) provided in the air conditioner 100, and the like.
  • the input circuit 41 outputs various input information to the arithmetic processing unit 42.
  • the arithmetic processing device 42 is a microcomputer such as a CPU, for example, and implements various functions by executing software stored in the storage device 43.
  • the arithmetic processing unit 42 is not limited to this, and may be configured by hardware such as a circuit device that implements various functions.
  • the arithmetic processing unit 42 performs various processes based on information received from the input circuit 41 using data stored in the storage device 43.
  • the arithmetic processing unit 42 generates control information for performing various operations provided in the outdoor unit 20, control information for the indoor unit 10, and the like, and outputs the control information to the output circuit 44.
  • the control information generated at this time is, for example, information for controlling the operating frequency of the compressor 21 based on the room temperature and the sensible temperature calculated by the indoor control device 30 and the set temperature of the indoor unit 10.
  • the other control information includes, for example, information for controlling the air volume of the outdoor fan 24, information for controlling the refrigerant flow switching device 22, and the like.
  • the storage device 43 stores programs and various data necessary for processing performed by the arithmetic processing device 42.
  • the storage device 43 stores data obtained by various processes in the arithmetic processing device 42.
  • the output circuit 44 receives various control information from the arithmetic processing unit 42 and outputs the control information to the operation device provided in the corresponding outdoor unit 20 or the indoor unit 10. For example, when control information for controlling the operating frequency of the compressor 21 is received, the output circuit 44 outputs this control information to the compressor 21. For example, when control information for controlling the air volume is received, the output circuit 44 outputs this control information to a driving device (not shown) for driving the outdoor blower 24. Further, for example, when control information for the indoor unit 10 is received, the output circuit 34 outputs this control information to the indoor control device 30 of the indoor unit 10.
  • the state indicated by the solid line of the refrigerant flow switching device 22 is the state in the cooling operation mode, and the flow direction of the refrigerant is indicated by the solid line.
  • coolant flow path switching apparatus 22 is a state in heating operation mode, and the flow direction of a refrigerant
  • coolant is shown with a broken line.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 21 flows into the outdoor heat exchanger 23 via the refrigerant flow switching device 22.
  • the high-temperature and high-pressure gas refrigerant that has flowed into the outdoor heat exchanger 23 is condensed with heat exchange with the outdoor air while dissipating heat, and becomes a supercooled high-pressure liquid refrigerant that flows out of the outdoor heat exchanger 23.
  • the high-pressure liquid refrigerant that has flowed out of the outdoor heat exchanger 23 is decompressed by the expansion valve 11 to become a low-temperature and low-pressure gas-liquid two-phase refrigerant and flows into the indoor heat exchanger 12.
  • the low-temperature and low-pressure gas-liquid two-phase refrigerant that has flowed into the indoor heat exchanger 12 cools the indoor air by exchanging heat with the indoor air and absorbs and evaporates, thereby becoming a low-temperature and low-pressure gas refrigerant. Spill from.
  • the low-temperature and low-pressure gas refrigerant that has flowed out of the indoor heat exchanger 12 passes through the refrigerant flow switching device 22 and is sucked into the compressor 21.
  • Heating operation mode Next, the operation of the refrigerant in the heating operation mode will be described.
  • the refrigerant flow switching device 22 is switched to the state shown by the dotted line in FIG. 3, the discharge side of the compressor 21 and the indoor heat exchanger 12 are connected, and the suction side and the outdoor side of the compressor 21 are connected.
  • the heat exchanger 23 is connected.
  • the low-temperature and low-pressure refrigerant is compressed by the compressor 21 and discharged as a high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 21 flows into the indoor heat exchanger 12 via the refrigerant flow switching device 22.
  • the high-temperature and high-pressure gas refrigerant that has flowed into the indoor heat exchanger 12 is condensed while dissipating heat by exchanging heat with the indoor air, and flows out of the indoor heat exchanger 12 as a high-pressure liquid refrigerant in a supercooled state.
  • the high-pressure liquid refrigerant that has flowed out of the indoor heat exchanger 12 is decompressed by the expansion valve 11 to become a low-temperature and low-pressure gas-liquid two-phase refrigerant and flows into the outdoor heat exchanger 23.
  • the low-temperature and low-pressure gas-liquid two-phase refrigerant that has flowed into the outdoor heat exchanger 23 exchanges heat with outdoor air, absorbs heat and evaporates, and flows out of the outdoor heat exchanger 23 as low-temperature and low-pressure gas refrigerant.
  • the low-temperature and low-pressure gas refrigerant that has flowed out of the outdoor heat exchanger 23 passes through the refrigerant flow switching device 22 and is sucked into the compressor 21.
  • the air conditioning process by the air conditioner 100 according to the first embodiment will be described.
  • the air conditioner 100 detects the presence / absence of a human body in a room and the position of the human body when the human body exists, and performs air conditioning according to the detected position of the human body.
  • FIG. 12 is a flowchart showing an example of the flow of air conditioning processing by the air conditioner 100 according to the first embodiment. The process shown in FIG. 12 is performed every preset time.
  • step S ⁇ b> 1 the temperature information acquisition unit 51 acquires temperature information within the set range detected by the infrared sensor 5 from the input circuit 31.
  • the thermal image creation unit 53 creates a thermal image indicating the temperature distribution in the room based on the temperature information acquired by the temperature information acquisition unit 51.
  • the thermal image creation unit 53 creates a thermal image using the corrected temperature information.
  • step S2 the indoor detection unit 54 detects the temperature of the structure forming the room from the created thermal image, and also detects the presence of a human body in the room and the position of the existing human body.
  • step S ⁇ b> 3 the sensory temperature calculation unit 55 calculates the sensory temperature at the position of the human body detected by the indoor detection unit 54.
  • step S ⁇ b> 4 the device control unit 56 controls each device such as the up / down wind direction plate 3, the left / right wind direction plate 4, the expansion valve 11, and the indoor blower 13 provided in the indoor unit 10 based on the calculated sensible temperature. Control signal for output. Moreover, the apparatus control part 56 outputs the control signal for controlling each apparatus, such as the compressor 21, the refrigerant
  • a thermal image is created based on the indoor temperature information detected by the infrared sensor 5, and the sensory temperature at the position of the human body in the room is calculated from the created thermal image. And by controlling each apparatus in the indoor unit 10 and the outdoor unit 20 based on the calculated sensible temperature, the wind direction and the air volume with respect to the human body are appropriately controlled.
  • the correction method when calibrating the temperature differs depending on the characteristics of the infrared sensor 5.
  • the infrared sensor 5 is a thermopile method
  • the infrared sensor 5 takes out a temperature difference between a hot junction based on infrared rays output from the temperature measurement object and a cold junction on the substrate as a voltage difference by the Seebeck effect.
  • the temperature of the hot junction is acquired by converting the infrared rays from the temperature measurement object absorbed by the infrared absorption film into a temperature.
  • the temperature of the cold junction is acquired by a temperature sensor provided on the substrate of the infrared sensor 5. Thereby, the infrared sensor 5 detects the temperature of the temperature measurement object.
  • the relationship represented by the linear approximation shown in Formula (1) is established between the output value of the infrared sensor 5 and the temperature obtained based on the output value.
  • the variable x indicates the output value of the infrared sensor 5 and the variable y indicates the temperature.
  • the slope a and the intercept b of the first-order approximate expression shown in the expression (1) change due to self-heating or the like. For this reason, when using a first-order approximation formula with the slope a and the intercept b changed, the temperature calculated based on the output value of the infrared sensor 5 includes an error.
  • FIG. 13 is a schematic diagram for explaining the relationship between the output value of the infrared sensor 5 and the obtained temperature.
  • a primary approximation formula A indicated by a solid line indicates an approximation formula including an error due to self-heating.
  • a primary approximation formula B indicated by a broken line indicates an original approximation formula that does not include an error.
  • the temperature of the temperature measurement object obtained in a state including an error is “y 1 ” based on the first-order approximation formula A.
  • the temperature of the original temperature measurement object that does not include an error is “y 2 ” based on the linear approximation formula B. That is, the temperature of the temperature measurement object obtained in this case has an error of “y 2 ⁇ y 1 ”.
  • the temperature calibration is performed so that the output value “y 1 ” of the infrared sensor 5 approaches the output value “y 2 ”.
  • a coefficient is determined.
  • FIG. 14 is a flowchart showing an example of the flow of temperature calibration processing in the indoor unit 10 according to the first embodiment.
  • the temperature calibration process of FIG. 14 is performed when the temperature is acquired by the infrared sensor 5 in step S1 of FIG.
  • step S11 the temperature calibration determination unit 57 determines whether it is necessary to perform temperature calibration by a preset method.
  • step S11 the device control unit 56 sets the infrared sensor 5 so that the temperature of only the temperature calibration member 7 is detected by the infrared sensor 5 in step S12. move. Then, the temperature of the temperature calibration member 7 is detected by the infrared sensor 5. On the other hand, when it is determined that temperature calibration is not necessary (step S11; No), the process proceeds to step S15.
  • the reference value determination unit 58 determines a reference value used when performing temperature calibration.
  • the correction coefficient determination unit 59 determines an output correction coefficient based on the temperature information acquired by the temperature information acquisition unit 51 and the reference value determined by the reference value determination unit 58. For example, the output correction coefficient is determined so that the temperature information acquired by the temperature information acquisition unit 51 is the same as the reference value determined by the reference value determination unit 58.
  • the correction coefficient determination unit 59 stores the determined output correction coefficient in the storage device 33.
  • step S ⁇ b> 15 the temperature information acquisition unit 51 acquires temperature information within the set range detected by the infrared sensor 5 from the input circuit 31.
  • step S ⁇ b> 16 the temperature correction unit 52 corrects the detected temperature information using a correction formula that applies the output correction coefficient stored in the storage device 33.
  • FIG. 15 is a flowchart showing an example of determining whether or not temperature calibration is required in FIG.
  • the example of FIG. 15 is an example of a case where it is determined whether or not to perform temperature calibration based on the length of time for which the infrared sensor 5 is energized.
  • the reason why the temperature calibration of the infrared sensor 5 is determined based on the energization time is that an error occurs due to the infrared sensor 5 self-heating when the energization is continued.
  • step S21 the temperature calibration determination unit 57 controls the timer 60 so as to start measuring the energization time of the infrared sensor 5 at the timing when the energization of the infrared sensor 5 is started. Thereby, the timer 60 starts measuring the energization time of the infrared sensor 5.
  • step S ⁇ b> 22 the temperature calibration determination unit 57 determines whether or not the energization time of the infrared sensor 5 is longer than the set time.
  • step S22 If the energization time of the infrared sensor 5 is equal to or longer than the set time (step S22; Yes), the indoor control device 30 performs a temperature calibration process in step S23.
  • the temperature calibration process at this time is a process from step S12 to step S14 in FIG.
  • step S24 the temperature calibration determination unit 57 stops and resets the energization time of the infrared sensor 5 and restarts the time measurement after performing the temperature calibration process.
  • step S22 when the energization time of the infrared sensor 5 is less than the set time in step S22 (step S22; No), the process returns to step S22 until the energization time of the infrared sensor 5 exceeds the set time. The process of S22 is repeated.
  • timing for performing the temperature calibration process is not limited to the time when the infrared sensor 5 is energized.
  • the necessity of temperature calibration of the infrared sensor 5 may be determined according to the amount of change in the suction temperature of the air conditioner 100.
  • the temperature of the temperature calibration member 7 provided in the setting calibration range different from the setting range including the air conditioning target space by the infrared sensor 5. Is detected. Then, the temperature calibration of the infrared sensor 5 is performed based on the detected temperature of the temperature calibration member 7. As described above, since the temperature calibration of the infrared sensor 5 is performed, the temperature detected by the infrared sensor 5 can be brought close to the actual temperature, so that the detection accuracy of the room temperature can be improved. Since the detection accuracy of the indoor temperature is improved, the detection accuracy of the human body existing in the room is improved, so that the air conditioning can be performed as intended and a comfortable air-conditioned environment can be created.
  • the infrared sensor 5 rotates left and right or drives up and down toward the set calibration range in order to detect the temperature of the temperature calibration member 7 during temperature calibration. Thereby, the infrared sensor 5 can detect only the temperature of the temperature calibration member 7 within the set calibration range. Therefore, temperature calibration can be performed accurately.
  • the temperature calibration member 7 is configured integrally with the housing of the indoor unit 10. Therefore, since it is not necessary to produce the temperature calibration member 7 separately, the indoor unit 10 can be manufactured at low cost.
  • Embodiment 2 an air conditioner indoor unit according to Embodiment 2 of the present invention will be described.
  • the indoor control device 30 of the indoor unit 10 fixes the infrared sensor 5 and drives the temperature calibration member 7 when performing temperature calibration. That is, in the second embodiment, the temperature calibration member 7 is moved when performing temperature calibration so that the entire setting range of the infrared sensor 5 is covered.
  • the indoor control device 30 can perform the temperature calibration only by moving the temperature calibration member 7. Therefore, the degree of freedom of timing for performing temperature calibration is increased, and the chance of detecting an accurate temperature by the infrared sensor 5 can be increased.
  • thermopile type infrared sensor 5 is described as an example, but this is not limited to this example.
  • the infrared sensor 5 may be any sensor that can detect indoor temperature and calibrate the temperature, such as a bolometer method and an SOI method.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)
  • Radiation Pyrometers (AREA)

Abstract

Cette unité intérieure pour un climatiseur distribue de l'air conditionné à un espace à climatiser et comporte : un capteur qui balaie une zone définie comprenant l'espace à climatiser et détecte la température de l'espace à climatiser ; un élément d'étalonnage de température qui est disposé dans une zone d'étalonnage définie différente de la zone définie ; et un dispositif de commande qui commande l'entraînement du capteur et des commandes, sur la base du résultat de détection par le capteur, du flux d'air conditionné à distribuer. Le dispositif de commande entraîne le capteur vers la zone d'étalonnage définie de sorte que le capteur détecte la température de l'élément d'étalonnage de température, et le dispositif de commande effectue l'étalonnage de température du capteur sur la base de la température de l'élément d'étalonnage de température détectée par le capteur.
PCT/JP2018/019327 2018-05-18 2018-05-18 Unité intérieure pour climatiseur WO2019220631A1 (fr)

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JP2020134370A (ja) * 2019-02-21 2020-08-31 パナソニックＩｐマネジメント株式会社 温度検出システム、温度制御システム、制御方法、及びプログラム

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WO2017026071A1 (fr) * 2015-08-13 2017-02-16 三菱電機株式会社 Unité de capteur et unité intérieure pour dispositif de climatisation comprenant ladite unité de capteur
JP2017075731A (ja) * 2015-10-14 2017-04-20 パナソニックＩｐマネジメント株式会社 空気調和機
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JPH01147243A (ja) * 1987-12-02 1989-06-08 Sharp Corp 空気調和機
JPH0694521A (ja) * 1992-09-11 1994-04-05 Matsushita Electric Ind Co Ltd 焦電センサとそれを用いた空調制御法
EP2184553A1 (fr) * 2008-11-10 2010-05-12 LG Electronics Inc. Unité d'intérieur pour climatiseur
JP2011215155A (ja) * 2011-06-15 2011-10-27 Seiko Npc Corp 赤外線センサ測定装置
WO2017026071A1 (fr) * 2015-08-13 2017-02-16 三菱電機株式会社 Unité de capteur et unité intérieure pour dispositif de climatisation comprenant ladite unité de capteur
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