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WO2017077649A1 - Outdoor unit of air-conditioner - Google Patents

Outdoor unit of air-conditioner Download PDF

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Publication number
WO2017077649A1
WO2017077649A1 PCT/JP2015/081355 JP2015081355W WO2017077649A1 WO 2017077649 A1 WO2017077649 A1 WO 2017077649A1 JP 2015081355 W JP2015081355 W JP 2015081355W WO 2017077649 A1 WO2017077649 A1 WO 2017077649A1
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WO
WIPO (PCT)
Prior art keywords
temperature
control box
control board
air
outdoor unit
Prior art date
Application number
PCT/JP2015/081355
Other languages
French (fr)
Japanese (ja)
Inventor
正 有山
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.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2015/081355 priority Critical patent/WO2017077649A1/en
Priority to JP2017548603A priority patent/JP6529600B2/en
Publication of WO2017077649A1 publication Critical patent/WO2017077649A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units

Definitions

  • the present invention relates to an outdoor unit of an air conditioner having a control box containing electrical components.
  • the environmental temperature in the control box is lowered by the cold air from the evaporator when starting the air conditioner or operating the air conditioner, and it may be lower than the allowable lower limit temperature of the electrical equipment. .
  • the environmental temperature in the control box is lowered by the cold air from the evaporator when starting the air conditioner or operating the air conditioner, and it may be lower than the allowable lower limit temperature of the electrical equipment. .
  • the present invention has been made to solve the above-described problems, and even when the air conditioner is operated in a cryogenic environment, the environmental temperature in the control box and the temperature of the electrical components are
  • An object of the present invention is to obtain an outdoor unit of an air conditioner that maintains a certain level of air quality.
  • An outdoor unit of an air conditioner includes a housing, a control box disposed in the housing and containing a control board, a temperature sensor for detecting the temperature inside the control box, and the control box.
  • a heating device that heats the inside, and the heating device starts to be driven when a temperature detected by the temperature sensor falls below a lower limit value of an allowable temperature of the control board.
  • the heating device is configured to start driving when the temperature detected by the temperature sensor falls below the lower limit value of the allowable temperature of the control board. In this way, even when the air conditioner is operated in a cryogenic environment, the environmental temperature in the control box and the temperature of the electrical components are kept above a certain level, and the deterioration and life of each electrical component is maintained. It is possible to obtain an outdoor unit of an air conditioner that suppresses the decrease of the air conditioner.
  • FIG. 1 It is a schematic side sectional view of a control box provided inside the outdoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention. It is a schematic sectional side view of the control box provided in the inside of the outdoor unit of the air conditioning apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the state of the Peltier device provided in the inside of the outdoor unit of the air conditioning apparatus which concerns on Embodiment 2 of this invention.
  • FIG. [Configuration of air conditioner] 1 is a schematic circuit configuration diagram illustrating an example of a circuit configuration including an outdoor unit of an air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the air conditioner 100 includes an outdoor unit 1 and an indoor unit 2, and the outdoor unit 1 and the indoor unit 2 are connected by a refrigerant main pipe 3 and a refrigerant main pipe 7.
  • a compressor 5, a switching valve 8 such as a four-way valve, and an outdoor heat exchanger 6 are connected by a refrigerant pipe 4.
  • the outdoor unit 1 includes an outdoor fan 9 and a control box 22.
  • the compressor 5 sucks a low-temperature and low-pressure refrigerant and compresses the refrigerant to a high-temperature and high-pressure state.
  • the compressor 5 is composed of, for example, an inverter compressor capable of capacity control.
  • An outdoor fan 9 and a control box 22 are provided in the vicinity of the outdoor heat exchanger 6, and the outdoor fan 9 blows air to the outdoor heat exchanger 6.
  • the outdoor heat exchanger 6 functions as a condenser during the cooling operation, and functions as an evaporator during the heating operation.
  • the outdoor heat exchanger 6 performs heat exchange between the air supplied from the outdoor blower 9 such as a fan and the refrigerant. It is.
  • the switching valve 8 has a first port 8a, a second port 8b, a third port 8c, and a fourth port 8d. By connecting the ports to each other, the refrigerant flow and the heating operation in the cooling operation mode, which will be described later, are performed. The refrigerant flow in the mode is switched.
  • the indoor unit 2 includes an indoor fan 12, an indoor heat exchanger 10, and a throttle device 11.
  • the indoor unit 2 is connected to the outdoor unit 1 via the refrigerant main pipe 3 and the refrigerant main pipe 7 so that the refrigerant flows in or out.
  • the compressor 5, the outdoor heat exchanger 6, the expansion device 11, and the indoor heat exchanger 10 are sequentially connected via the pipe to constitute the refrigerant circuit of the air conditioner 100.
  • the indoor heat exchanger 10 performs heat exchange between air supplied from an indoor blower 12 such as a fan and a refrigerant, and generates heating air or cooling air to be supplied to an indoor space.
  • the expansion device 11 has a function as a pressure reducing valve or an expansion valve, expands the refrigerant by depressurizing it, and is preferably constituted by a device whose opening degree can be variably controlled, for example, an electronic expansion valve.
  • FIG. 2 is a refrigerant circuit diagram illustrating a refrigerant flow in the cooling operation mode of the outdoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the switching valve 8 in the cooling operation mode, the switching valve 8 is in a state where the first port 8a and the second port 8b communicate with each other, and the third port 8c and the fourth port 8d communicate with each other. It becomes. In this way, the refrigerant flows in the direction indicated by the solid arrow in FIG.
  • the low-temperature and low-pressure refrigerant is compressed by the compressor 5 and discharged as a high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 5 flows into the outdoor heat exchanger 6 through the switching valve 8.
  • the high-temperature high-pressure gas refrigerant that has flowed into the outdoor heat exchanger 6 is condensed while dissipating heat to the outdoor air, and becomes high-pressure liquid refrigerant.
  • the outdoor air heated by the outdoor heat exchanger 6 passes through the control box 22 and is discharged out of the outdoor unit 1 by the outdoor blower 9.
  • the high-pressure liquid refrigerant that has flowed out of the outdoor heat exchanger 6 flows out of the outdoor unit 1, passes through the refrigerant main pipe 7, and flows into the indoor unit 2.
  • the high-pressure liquid refrigerant that has flowed into the indoor unit 2 is reduced to a low-temperature and low-pressure two-phase refrigerant by the expansion device 11 and then flows into the indoor heat exchanger 10 that functions as an evaporator.
  • the low-temperature and low-pressure two-phase refrigerant cools the room air by absorbing heat from the room air, and becomes a low-temperature and low-pressure gas refrigerant.
  • the low-temperature and low-pressure gas refrigerant that has flowed out of the indoor heat exchanger 10 passes through the refrigerant main pipe 3 and flows into the outdoor unit 1.
  • the refrigerant flowing into the outdoor unit 1 passes through the switching valve 8 and is sucked into the compressor 5.
  • the cooling operation mode is performed by circulating the refrigerant in this way.
  • FIG. 3 is a refrigerant circuit diagram illustrating a refrigerant flow in the heating operation mode of the outdoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the switching valve 8 in the heating operation mode, the switching valve 8 is in a state where the first port 8a and the third port 8c communicate with each other, and the second port 8b and the fourth port 8d communicate with each other. It becomes. In this way, the refrigerant flows in the direction indicated by the solid arrow in FIG.
  • the low-temperature and low-pressure refrigerant is compressed by the compressor 5 and discharged as a high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 5 flows into the indoor unit 2 through the refrigerant main pipe 3 via the switching valve 8.
  • the high-temperature and high-pressure gas refrigerant that has flowed into the indoor unit 2 radiates heat to the indoor air in the indoor heat exchanger 10, becomes a high-pressure liquid refrigerant, and flows into the expansion device 11.
  • the refrigerant flows out of the indoor unit 2, passes through the refrigerant main pipe 7, and flows into the outdoor unit 1.
  • the low-temperature and low-pressure two-phase refrigerant flowing into the outdoor unit 1 becomes a low-temperature and low-pressure gas refrigerant by absorbing heat from the outdoor air in the outdoor heat exchanger 6.
  • the outdoor air cooled by the outdoor heat exchanger 6 passes through the control box 22 and is discharged out of the outdoor unit 1 by the outdoor blower 9.
  • the low-temperature and low-pressure gas refrigerant exiting the outdoor heat exchanger 6 passes through the switching valve 8 and is sucked into the compressor 5.
  • heating operation mode is performed because a refrigerant
  • coolant circulates.
  • the air conditioner 100 can perform both the cooling operation mode and the heating operation mode.
  • this invention is not limited to this,
  • the air conditioning apparatus 100 when using the air conditioning apparatus 100 in a very cold region, it is good also as a structure of the refrigerant circuit which drive
  • FIG. 4 is a schematic internal configuration diagram of the outdoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the outdoor unit 1 of the air conditioning apparatus 100 includes a housing 21 and an outdoor fan 9 provided on the top of the housing 21. Inside the casing 21, a control box 22, an outdoor heat exchanger 6, a compressor 5 (not shown), and a switching valve 8 (not shown) are provided.
  • the casing 21 is formed with an air passage 26 serving as an outdoor outdoor air passage for sending air to the outdoor heat exchanger 6.
  • the outdoor blower 9 blows outdoor air to the air passage 26 formed in the housing 21. Then, when the outdoor blower 9 provided at the upper portion of the casing 21 is rotationally driven, outdoor air flows in the casing 21 from the lower side to the upper side as indicated by the air passage 26.
  • the control box 22 is provided with a heat sink 23 a and a heat sink 23 b on the outer surface in contact with the air passage 26.
  • the heat sink 23a and the heat sink 23b are cooled by the outdoor air flowing toward it.
  • casing 21 was shown in this Embodiment 1, this invention is not limited to this, You may provide in places other than the upper part of the housing
  • FIG. 5 is a schematic side sectional view of the control box provided inside the outdoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the control box 22 includes a heat sink 23 a, a heat sink 23 b, a control board 27 a, a control board 27 b, a temperature sensor 28 a, a temperature sensor 28 b, and an electric heater 31.
  • the heat sink 23a is installed above the heat sink 23b.
  • the control board 27a is installed above the control board 27b.
  • the temperature sensor 28a is installed above the temperature sensor 28b.
  • an example in which two heat sinks, a control board, and a temperature sensor are provided has been described, but the present invention is not limited to this, and three or more heat sensors may be provided. The same applies to the second embodiment described later.
  • the control board 27a and the control board 27b control the air conditioning apparatus 100, and are boards on which, for example, an inverter circuit and a harmonic suppression circuit are formed.
  • the control board 27a is connected to the back plate 29 via the base 24a.
  • the control board 27b is connected to the back plate 29 through the base 24b.
  • the heat sink 23a and the control board 27a are provided adjacent to each other through the back plate 29 and the base 24a of the control box 22.
  • the heat sink 23b and the control board 27b are provided adjacent to each other via the back plate 29 and the base 24b of the control box 22.
  • the electrical components formed on the control board 27a and the control board 27b are cooled via the heat sink 23a and the heat sink 23b that are cooled by the wind passing through the air path 26.
  • the distribution state of the environmental temperature in the control box 22 will be described.
  • a difference occurs in the density of air inside the control box 22 due to heat generation of electrical components such as an inverter circuit. Due to the nature of the difference in air density, a temperature distribution is generated in the vertical direction inside the control box 22, and the temperature inside the control box 22 is high. On the other hand, the temperature inside the control box 22 is lower.
  • the outdoor heat exchanger 6 used in the heating operation used under the condition of low temperature outside air functions as an evaporator, and the temperature of the refrigerant flowing through the outdoor heat exchanger 6 is lower than the outside air temperature. ing.
  • the outdoor air cooled through the outdoor heat exchanger 6 passes through the air passage 26 and hits the lower part of the control box 22, so that the above-described temperature distribution is further promoted.
  • a temperature sensor 28 b for detecting a decrease in the environmental temperature inside the control box 22 is provided inside the control box 22.
  • the temperature sensor 28b is disposed below the control box 22, particularly at the lowermost portion of the control board 27b where a lower limit value of the temperature range is expected. By doing so, it is possible to grasp how many times the temperature state of the control board 27a and the control board 27b provided in the control box 22 is over while reducing the number of measurement points inside the control box 22. Can do.
  • the electric heater 31 is used as means for increasing the temperature between the control board 27a and the control board 27b and the environmental temperature inside the control box 22. Provided below the inside of the. By disposing the electric heater 31 below the inside of the control box 22, particularly at the bottom, the control board 27b provided below the inside of the control box 22 where the environmental temperature is likely to be lowered can be heated. In addition, with respect to the control board 27a provided above the control board 27b, the air heated by the electric heater 31 is raised by natural convection, whereby the control board 27a can be heated. Thus, by installing the electric heater 31 below the inside of the control box 22, the entire control box 22 can be efficiently heated.
  • the electric heater 31 corresponds to the “heating device” in the present invention.
  • the operation of the electric heater 31 will be described.
  • the outdoor unit 1 when the outside air temperature is in a low temperature state, when the temperature detected by the temperature sensor 28b falls below the lower limit value of the allowable temperature of the control board 27a and the control board 27b, the driving of the electric heater 31 is started.
  • the temperature detected by the temperature sensor 28b becomes a certain value or more, for example, when the temperature exceeds the upper limit value of the allowable temperature of the control board 27a and the control board 27b, the driving of the electric heater 31 is stopped.
  • the allowable temperature refers to a temperature range in which the control boards 27a and 27b operate normally and no failure occurs.
  • the environmental temperature inside the control box 22 and the temperatures of the control board 27a and the control board 27b are kept above a certain level, Deterioration of products and reduction of service life can be suppressed.
  • the air conditioner 100 when the air conditioner 100 is operated under a condition where the outside air temperature is high, in order to protect the upper limit of the temperature range of the control board 27a and the control board 27b, the upper side of the control box 22, particularly the top of the control board 27a. It is preferable to install a temperature sensor 28a at the top. When the temperature detected by the temperature sensor 28a exceeds the upper limit value of the allowable temperature of the control board 27a and the control board 27b, the temperature of the control board 27a and the control board 27b is reduced by reducing the operation load of the outdoor unit 1. The rise can be suppressed.
  • the outdoor unit 1 of the air conditioning apparatus 100 includes the housing 21, the control box 22 that is disposed in the housing 21 and houses the control boards 27a and 27b,
  • the temperature sensor 28a, 28b for detecting the temperature inside the control box 22 and a heat generating device for heating the inside of the control box 22 are provided.
  • the heat generating device has a temperature detected by the temperature sensor 28a, 28b and the control board 27a, 27b. When the temperature falls below the lower limit of the allowable temperature, the drive is started.
  • the outdoor unit 1 of the air conditioning apparatus 100 which keeps the environmental temperature in the control box 22 and the temperature of an electrical component more than fixed, and suppresses deterioration of each electrical component and lifetime reduction can be obtained.
  • two temperature sensors 28 a and 28 b are provided above and below the control box 22. By doing in this way, the environmental temperature inside the control box 22 can be efficiently detected with a small number of temperature sensors.
  • the electric heater 31 is provided below the control box 22.
  • the air heated below the control box 22 rises by natural convection, so that the air above the control box 22 and electrical components can be efficiently heated.
  • the electric heater 31 starts driving when the temperature detected by the lower temperature sensor 28b of the temperature sensors 28a and 28b falls below the lower limit value of the allowable temperature of the control boards 27a and 27b mounted on the control box 22.
  • the drive is stopped when the temperature detected by the upper temperature sensor 28a of the temperature sensors 28a and 28b exceeds the upper limit value of the allowable temperature of the control boards 27a and 27b mounted on the control box 22.
  • the outdoor unit 1 of the air conditioning apparatus 100 which keeps the environmental temperature in the control box 22 and the temperature of an electrical component constant, and suppresses deterioration of each electrical component and a lifetime reduction can be obtained.
  • Embodiment 2 Since the basic configuration of the outdoor unit of the air-conditioning apparatus in the second embodiment is the same as that of the outdoor unit of the air-conditioning apparatus in the first embodiment, the present embodiment will be mainly described below with respect to differences from the first embodiment. Form 2 will be described. The difference between the first embodiment and the second embodiment is that the heat generating device is composed of Peltier elements.
  • FIG. 6 is a schematic side cross-sectional view of a control box provided in the outdoor unit of the air-conditioning apparatus according to Embodiment 2 of the present invention.
  • the control box 22 controls the air conditioner 100.
  • the control box 22 includes a heat sink 23c, a heat sink 23d, a control board 27a, a control board 27b, a temperature sensor 28a, a temperature sensor 28b, a Peltier element 29a, and a Peltier element 29b.
  • the Peltier element 29a is provided above the Peltier element 29b.
  • the Peltier element 29a is disposed on the inner wall surface of the control box 22 so as to be in contact with the control board 27a via the heat sink 23c. That is, the Peltier element 29a constitutes the base of the control board 27a.
  • the Peltier element 29b is disposed on the inner wall surface of the control box 22 so as to contact the control board 27b via the heat sink 23d. That is, the Peltier element 29b constitutes the base of the control board 27b.
  • the temperature sensor 28a is raised above the control box 22, particularly by operation, so as not to exceed the allowable upper limit temperature of each electrical component. Is disposed on the uppermost portion of the control board 27a.
  • the operating load of the outdoor unit 1 is reduced to suppress the temperature rise inside the control box 22 and protect the electrical components. be able to.
  • the control board 27a is cooled without lowering the operating load of the outdoor unit 1 by applying power to the Peltier element 29a so that the surface of the Peltier element 29a contacting the heat sink 23c becomes a cooling surface. You can also.
  • the above-described Peltier element 29a and Peltier element 29b can exchange the cooling surface and the heating surface by changing the polarity of charging. Therefore, the temperature state inside the control box 22 is detected based on the detected temperature of the temperature sensor 28a and the temperature sensor 28b, whether the Peltier element 29a and the Peltier element 29b need to be heated, and the cooling surface and the heating surface. Switching can be done. In this way, it is possible to realize an increase in the temperature of the control boards 27a and 27b under a situation where the outside air temperature is low. In addition, it is possible to suppress an increase in the temperature of the control boards 27a and 27b under a situation where the outside air temperature is high.
  • FIG. 7 is a diagram illustrating a state of the Peltier element provided in the outdoor unit of the air-conditioning apparatus according to Embodiment 2 of the present invention.
  • the threshold value of the allowable upper limit temperature necessary for protecting the control board 27a at the temperature detected by the temperature sensor 28a is D.
  • C be the threshold value of the allowable lower limit temperature necessary for protecting the control board 27a at the temperature detected by the temperature sensor 28a.
  • the Peltier element 29a is energized so that the surface in contact with the heat sink 23c, that is, the control board 27a side becomes the cooling surface.
  • the Peltier element 29a When the temperature detected by the temperature sensor 28a is lower than the threshold value C, the Peltier element 29a is energized so that the surface in contact with the heat sink 23c, that is, the control board 27a side becomes the heating surface. On the other hand, when the temperature detected by the temperature sensor 28a is between the threshold values D and C, the Peltier element 29a is not energized.
  • the threshold value of the allowable upper limit temperature necessary for protecting the control board 27b at the temperature detected by the temperature sensor 28b is B.
  • the threshold value of the allowable lower limit temperature necessary for protecting the control board 27b at the temperature detected by the temperature sensor 28b is A.
  • the Peltier element 29b is energized so that the surface in contact with the heat sink 23d, that is, the control board 27b side becomes the cooling surface.
  • the temperature detected by the temperature sensor 28b is lower than the threshold value A
  • the Peltier element 29b is energized so that the surface in contact with the heat sink 23d, that is, the control board 27b side becomes the heating surface.
  • the temperature detected by the temperature sensor 28b is between the threshold values B and A, the Peltier element 29b is not energized.
  • the Peltier element 29a and the Peltier element 29b will be described with reference to FIG.
  • the temperature detected by the temperature sensor 28b is lower than the threshold value A, so that the surface that contacts the heat sink 23d of the Peltier element 29b becomes the heating surface.
  • the element 29b is energized.
  • the temperature sensor state 120a since the temperature detected by the temperature sensor 28a is between the threshold values C and D, the Peltier element 29a is not charged.
  • the temperature inside the control box 22 rises due to the heating of the Peltier element 29b and the temperature sensor state 120b is reached, the heating to the Peltier element 29b is finished.
  • the Peltier element 29a and the Peltier element 29b for cooling the control board 27a and the control board 27b, it is not necessary to provide a heat sink on the outer surface of the control box 22, and the control box can be made more compact. Moreover, the restriction that the control box must be installed along the air path in the outdoor unit is eliminated, and the degree of freedom in designing the structural arrangement of the outdoor unit of the air conditioner can be improved.
  • the heat generating device is composed of the Peltier elements 29a and 29b, and the Peltier elements 29a and 29b are the bases of the control boards 27a and 27b mounted on the control box 22. It is composed.
  • the control box can be made more compact.
  • the restriction that the control box must be installed along the air path in the outdoor unit is eliminated, and the degree of freedom in designing the structural arrangement of the outdoor unit of the air conditioner can be improved.
  • the outdoor unit 1 of the air conditioning apparatus 100 which keeps the environmental temperature in the control box 22 and the temperature of an electrical component more than fixed, and suppresses deterioration of each electrical component and lifetime reduction can be obtained.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

This outdoor unit of an air-conditioner is equipped with: a housing; a control box which is disposed within the housing and stores a control substrate; temperature sensors which detect the temperature of the interior of the control box; and a heat generation device which heats the interior of the control box. The drive of the heat generation device is started when the temperature detected by the temperature sensors falls below the lower limit of the allowable temperature of the control substrate.

Description

空気調和装置の室外機Air conditioner outdoor unit
　本発明は、電装品を収納した制御箱を有する空気調和装置の室外機に関するものである。 The present invention relates to an outdoor unit of an air conditioner having a control box containing electrical components.
　従来から、空気調和装置の室外機において、制御装置の電装品である整流回路、直流リアクトル及びインバーター等を制御箱に収納しているものがある。そして、その制御箱を室外機内の風路上に配置して上記の電装品を冷却する空気調和装置の室外機が提案されている（例えば特許文献１参照）。 Conventionally, in an outdoor unit of an air conditioner, there are some in which a rectifier circuit, a DC reactor, an inverter, and the like, which are electrical components of a control device, are stored in a control box. And the outdoor unit of the air conditioning apparatus which arrange | positions the control box on the wind path in an outdoor unit, and cools said electrical component is proposed (for example, refer patent document 1).
特開平１１－７５３６３号公報JP 11-75363 A
　近年、空気調和装置の運転環境の範囲は、販売エリアの拡大に伴い広域となっている。そして、運転環境の広域化に伴い、従来のように電装品の冷却が必要となる高温外気の環境での使用に加えて、－２０℃を下回るような低温外気の環境でも使用される場合が生じてきた。 In recent years, the operating environment of air conditioners has become wider as sales areas expand. And with the widening of the operating environment, in addition to the use in the high temperature outside air environment that requires cooling of electrical components as in the past, it may be used in the low temperature outside air environment that is below -20 ° C. It has occurred.
　低温外気の環境下においては、空気調和装置の起動時、又は空気調和装置の運転に伴う蒸発器からの冷風により制御箱内の環境温度は下がり、電装品の許容下限の温度を下回ることがある。これにより、各電装品の劣化及び寿命の減少を招くという問題点があった。 Under the environment of low temperature outside air, the environmental temperature in the control box is lowered by the cold air from the evaporator when starting the air conditioner or operating the air conditioner, and it may be lower than the allowable lower limit temperature of the electrical equipment. . Thereby, there existed a problem of causing deterioration of each electrical component and the reduction | decrease in lifetime.
　本発明は、上記のような課題を解決するためになされたものであり、極低温の環境下で空気調和装置が運転された場合であっても、制御箱内の環境温度及び電装品の温度を一定以上に保つ空気調和装置の室外機を得ることを目的とする。 The present invention has been made to solve the above-described problems, and even when the air conditioner is operated in a cryogenic environment, the environmental temperature in the control box and the temperature of the electrical components are An object of the present invention is to obtain an outdoor unit of an air conditioner that maintains a certain level of air quality.
　本発明に係る空気調和装置の室外機は、筐体と、前記筐体内に配置され、制御基板を収納する制御箱と、前記制御箱の内部の温度を検知する温度センサーと、前記制御箱の内部を加熱する発熱装置と、を備え、前記発熱装置は、前記温度センサーの検知温度が前記制御基板の許容温度の下限値を下回ったときに駆動が開始されるものである。 An outdoor unit of an air conditioner according to the present invention includes a housing, a control box disposed in the housing and containing a control board, a temperature sensor for detecting the temperature inside the control box, and the control box. A heating device that heats the inside, and the heating device starts to be driven when a temperature detected by the temperature sensor falls below a lower limit value of an allowable temperature of the control board.
　本発明によれば、発熱装置は、温度センサーの検知温度が制御基板の許容温度の下限値を下回ったときに駆動が開始される構成とする。このようにすることで、極低温の環境下で空気調和装置が運転された場合であっても、制御箱内の環境温度及び電装品の温度を一定以上に保ち、各電装品の劣化及び寿命の減少を抑える空気調和装置の室外機を得ることができる。 According to the present invention, the heating device is configured to start driving when the temperature detected by the temperature sensor falls below the lower limit value of the allowable temperature of the control board. In this way, even when the air conditioner is operated in a cryogenic environment, the environmental temperature in the control box and the temperature of the electrical components are kept above a certain level, and the deterioration and life of each electrical component is maintained. It is possible to obtain an outdoor unit of an air conditioner that suppresses the decrease of the air conditioner.
本発明の実施の形態１に係る空気調和装置の室外機を含む回路構成の一例を示す概略回路構成図である。It is a schematic circuit block diagram which shows an example of the circuit structure containing the outdoor unit of the air conditioning apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和装置の室外機の冷房運転モード時における冷媒の流れを示す冷媒回路図である。It is a refrigerant circuit figure which shows the flow of the refrigerant | coolant at the time of the air_conditioning | cooling operation mode of the outdoor unit of the air conditioning apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和装置の室外機の暖房運転モード時における冷媒の流れを示す冷媒回路図である。It is a refrigerant circuit figure which shows the flow of the refrigerant | coolant at the time of the heating operation mode of the outdoor unit of the air conditioning apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和装置の室外機の概略内部構成図である。It is a schematic internal block diagram of the outdoor unit of the air conditioning apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和装置の室外機の内部に設けられた制御箱の概略側面断面図である。It is a schematic side sectional view of a control box provided inside the outdoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention. 本発明の実施の形態２に係る空気調和装置の室外機の内部に設けられた制御箱の概略側面断面図である。It is a schematic sectional side view of the control box provided in the inside of the outdoor unit of the air conditioning apparatus which concerns on Embodiment 2 of this invention. 本発明の実施の形態２に係る空気調和装置の室外機の内部に設けられたペルチェ素子の状態を示す図である。It is a figure which shows the state of the Peltier device provided in the inside of the outdoor unit of the air conditioning apparatus which concerns on Embodiment 2 of this invention.
　以下、本発明の空気調和機の室外機の実施の形態について、図面を参照して説明する。なお、図面の形態は一例であり、本発明を限定するものではない。また、各図において同一の符号を付したものは、同一の又はこれに相当するものであり、これは明細書の全文において共通している。さらに、以下の図面では各構成部材の大きさの関係が実際のものとは異なる場合がある。 Hereinafter, embodiments of an outdoor unit of an air conditioner according to the present invention will be described with reference to the drawings. In addition, the form of drawing is an example and does not limit this invention. Moreover, what attached | subjected the same code | symbol in each figure is the same or it corresponds, and this is common in the whole text of a specification. Furthermore, in the following drawings, the relationship between the sizes of the constituent members may be different from the actual one.
実施の形態１．
［空気調和装置の構成］
　図１は、本発明の実施の形態１に係る空気調和装置の室外機を含む回路構成の一例を示す概略回路構成図である。図１に示されるように、空気調和装置１００は、室外機１及び室内機２を有し、室外機１と室内機２とは、冷媒主管３及び冷媒主管７で接続されている。 Embodiment 1 FIG.
[Configuration of air conditioner]
1 is a schematic circuit configuration diagram illustrating an example of a circuit configuration including an outdoor unit of an air-conditioning apparatus according to Embodiment 1 of the present invention. As shown in FIG. 1, the air conditioner 100 includes an outdoor unit 1 and an indoor unit 2, and the outdoor unit 1 and the indoor unit 2 are connected by a refrigerant main pipe 3 and a refrigerant main pipe 7.
　［室外機１の構成］
　室外機１には、圧縮機５と、四方弁等の切替弁８と、室外側熱交換器６とが、冷媒配管４で接続されて搭載されている。また、室外機１には、室外送風機９及び制御箱２２が搭載されている。圧縮機５は、低温低圧の冷媒を吸入し、その冷媒を圧縮して高温高圧の状態にするものであり、たとえば容量制御可能なインバーター圧縮機等で構成されている。室外側熱交換器６の付近には、室外送風機９及び制御箱２２が設けられ、室外送風機９は室外側熱交換器６に空気を送風する。室外側熱交換器６は、冷房運転時には凝縮器として機能し、暖房運転時には蒸発器として機能し、例えば、ファン等の室外送風機９から供給される空気と冷媒との間で熱交換を行うものである。切替弁８は、第一ポート８ａ、第二ポート８ｂ、第三ポート８ｃ及び第四ポート８ｄを有し、各ポートを互いに接続することで、後述する冷房運転モード時における冷媒の流れと暖房運転モード時における冷媒の流れとを切り替えるものである。 [Configuration of outdoor unit 1]
In the outdoor unit 1, a compressor 5, a switching valve 8 such as a four-way valve, and an outdoor heat exchanger 6 are connected by a refrigerant pipe 4. The outdoor unit 1 includes an outdoor fan 9 and a control box 22. The compressor 5 sucks a low-temperature and low-pressure refrigerant and compresses the refrigerant to a high-temperature and high-pressure state. The compressor 5 is composed of, for example, an inverter compressor capable of capacity control. An outdoor fan 9 and a control box 22 are provided in the vicinity of the outdoor heat exchanger 6, and the outdoor fan 9 blows air to the outdoor heat exchanger 6. The outdoor heat exchanger 6 functions as a condenser during the cooling operation, and functions as an evaporator during the heating operation. For example, the outdoor heat exchanger 6 performs heat exchange between the air supplied from the outdoor blower 9 such as a fan and the refrigerant. It is. The switching valve 8 has a first port 8a, a second port 8b, a third port 8c, and a fourth port 8d. By connecting the ports to each other, the refrigerant flow and the heating operation in the cooling operation mode, which will be described later, are performed. The refrigerant flow in the mode is switched.
　［室内機２の構成］
　室内機２には、室内送風機１２と、室内側熱交換器１０と、絞り装置１１と、が搭載されている。室内機２は、冷媒主管３及び冷媒主管７を介して室外機１と接続し、冷媒が流入又は流出するようになっている。このように、圧縮機５、室外側熱交換器６、絞り装置１１及び室内側熱交換器１０が配管を介して順次接続されて空気調和装置１００の冷媒回路が構成されている。 [Configuration of indoor unit 2]
The indoor unit 2 includes an indoor fan 12, an indoor heat exchanger 10, and a throttle device 11. The indoor unit 2 is connected to the outdoor unit 1 via the refrigerant main pipe 3 and the refrigerant main pipe 7 so that the refrigerant flows in or out. As described above, the compressor 5, the outdoor heat exchanger 6, the expansion device 11, and the indoor heat exchanger 10 are sequentially connected via the pipe to constitute the refrigerant circuit of the air conditioner 100.
　室内側熱交換器１０は、例えばファン等の室内送風機１２から供給される空気と冷媒との間で熱交換を行い、室内空間に供給するための暖房用空気又は冷房用空気を生成するものである。また、絞り装置１１は減圧弁又は膨張弁としての機能を有し、冷媒を減圧して膨張させるものであり、開度が可変に制御可能なもの、たとえば電子式膨張弁等で構成すると良い。 The indoor heat exchanger 10 performs heat exchange between air supplied from an indoor blower 12 such as a fan and a refrigerant, and generates heating air or cooling air to be supplied to an indoor space. is there. The expansion device 11 has a function as a pressure reducing valve or an expansion valve, expands the refrigerant by depressurizing it, and is preferably constituted by a device whose opening degree can be variably controlled, for example, an electronic expansion valve.
［冷房運転モード］
　図２は、本発明の実施の形態１に係る空気調和装置の室外機の冷房運転モード時における冷媒の流れを示す冷媒回路図である。図２に示されるように、冷房運転モードにおいて、切替弁８は、第一ポート８ａと第二ポート８ｂとが互いに連通し、かつ、第三ポート８ｃと第四ポート８ｄとが互いに連通する状態となる。このようにして、冷媒は、図２の実線矢印で示される方向に流れる。 [Cooling operation mode]
FIG. 2 is a refrigerant circuit diagram illustrating a refrigerant flow in the cooling operation mode of the outdoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention. As shown in FIG. 2, in the cooling operation mode, the switching valve 8 is in a state where the first port 8a and the second port 8b communicate with each other, and the third port 8c and the fourth port 8d communicate with each other. It becomes. In this way, the refrigerant flows in the direction indicated by the solid arrow in FIG.
　冷房運転モードの場合、低温低圧の冷媒が、圧縮機５によって圧縮され、高温高圧のガス冷媒となって吐出される。圧縮機５から吐出された高温高圧のガス冷媒は、切替弁８を介して室外側熱交換器６に流入する。室外側熱交換器６に流入した高温高圧ガス冷媒は、室外空気に放熱しながら凝縮し高圧の液冷媒となる。この際、室外側熱交換器６で加熱された室外空気は、制御箱２２を通り、室外送風機９によって室外機１の外へ排出される。そして、室外側熱交換器６から流出した高圧の液冷媒は、室外機１から流出し、冷媒主管７を通り、室内機２に流入する。 In the cooling operation mode, the low-temperature and low-pressure refrigerant is compressed by the compressor 5 and discharged as a high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant discharged from the compressor 5 flows into the outdoor heat exchanger 6 through the switching valve 8. The high-temperature high-pressure gas refrigerant that has flowed into the outdoor heat exchanger 6 is condensed while dissipating heat to the outdoor air, and becomes high-pressure liquid refrigerant. At this time, the outdoor air heated by the outdoor heat exchanger 6 passes through the control box 22 and is discharged out of the outdoor unit 1 by the outdoor blower 9. The high-pressure liquid refrigerant that has flowed out of the outdoor heat exchanger 6 flows out of the outdoor unit 1, passes through the refrigerant main pipe 7, and flows into the indoor unit 2.
　室内機２に流入した高圧の液冷媒は、絞り装置１１によって低温低圧の二相冷媒に減圧された後、蒸発器として作用する室内側熱交換器１０に流入する。そして、低温低圧の二相冷媒は、室内空気から吸熱することで室内空気を冷却し、低温低圧のガス冷媒となる。室内側熱交換器１０から流出した低温低圧のガス冷媒は、冷媒主管３を通り室外機１へ流入する。室外機１に流入した冷媒は、切替弁８を通り、圧縮機５へ吸入される。このように冷媒が循環することで、冷房運転モードが行われる。 The high-pressure liquid refrigerant that has flowed into the indoor unit 2 is reduced to a low-temperature and low-pressure two-phase refrigerant by the expansion device 11 and then flows into the indoor heat exchanger 10 that functions as an evaporator. The low-temperature and low-pressure two-phase refrigerant cools the room air by absorbing heat from the room air, and becomes a low-temperature and low-pressure gas refrigerant. The low-temperature and low-pressure gas refrigerant that has flowed out of the indoor heat exchanger 10 passes through the refrigerant main pipe 3 and flows into the outdoor unit 1. The refrigerant flowing into the outdoor unit 1 passes through the switching valve 8 and is sucked into the compressor 5. The cooling operation mode is performed by circulating the refrigerant in this way.
［暖房運転モード］
　図３は、本発明の実施の形態１に係る空気調和装置の室外機の暖房運転モード時における冷媒の流れを示す冷媒回路図である。図３に示されるように、暖房運転モードにおいて、切替弁８は、第一ポート８ａと第三ポート８ｃとが互いに連通し、かつ、第二ポート８ｂと第四ポート８ｄとが互いに連通する状態となる。このようにして、冷媒は、図３の実線矢印で示される方向に流れる。 [Heating operation mode]
FIG. 3 is a refrigerant circuit diagram illustrating a refrigerant flow in the heating operation mode of the outdoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention. As shown in FIG. 3, in the heating operation mode, the switching valve 8 is in a state where the first port 8a and the third port 8c communicate with each other, and the second port 8b and the fourth port 8d communicate with each other. It becomes. In this way, the refrigerant flows in the direction indicated by the solid arrow in FIG.
　暖房運転モードの場合、低温低圧の冷媒が圧縮機５によって圧縮され、高温高圧のガス冷媒となって吐出される。圧縮機５から吐出された高温高圧のガス冷媒は、切替弁８を介して冷媒主管３を通り室内機２に流入する。室内機２に流入した高温高圧ガス冷媒は、室内側熱交換器１０で室内空気に放熱し、高圧の液冷媒となり、絞り装置１１へ流入する。そして、絞り装置１１によって低温低圧の二相冷媒に減圧された後、室内機２から流出し、冷媒主管７を通り、室外機１へ流入する。 In the heating operation mode, the low-temperature and low-pressure refrigerant is compressed by the compressor 5 and discharged as a high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant discharged from the compressor 5 flows into the indoor unit 2 through the refrigerant main pipe 3 via the switching valve 8. The high-temperature and high-pressure gas refrigerant that has flowed into the indoor unit 2 radiates heat to the indoor air in the indoor heat exchanger 10, becomes a high-pressure liquid refrigerant, and flows into the expansion device 11. Then, after the pressure is reduced to the low-temperature and low-pressure two-phase refrigerant by the expansion device 11, the refrigerant flows out of the indoor unit 2, passes through the refrigerant main pipe 7, and flows into the outdoor unit 1.
　室外機１へ流入した低温低圧の二相冷媒は、室外側熱交換器６で室外空気から吸熱することで低温低圧のガス冷媒となる。この際、室外側熱交換器６で冷却された室外空気は、制御箱２２を通り、室外送風機９によって室外機１の外へ排出される。室外側熱交換器６を出た低温低圧のガス冷媒は、切替弁８を通り、圧縮機５へ吸入される。このように冷媒が循環することで、暖房運転モードが行われる。 The low-temperature and low-pressure two-phase refrigerant flowing into the outdoor unit 1 becomes a low-temperature and low-pressure gas refrigerant by absorbing heat from the outdoor air in the outdoor heat exchanger 6. At this time, the outdoor air cooled by the outdoor heat exchanger 6 passes through the control box 22 and is discharged out of the outdoor unit 1 by the outdoor blower 9. The low-temperature and low-pressure gas refrigerant exiting the outdoor heat exchanger 6 passes through the switching valve 8 and is sucked into the compressor 5. Thus, heating operation mode is performed because a refrigerant | coolant circulates.
　なお、本実施の形態１において、空気調和装置１００が冷房運転モード及び暖房運転モードの両方の運転ができる例を示した。しかし、本発明はこれに限定されず、例えば、空気調和装置１００を極寒冷地で使用する場合には、暖房運転モードのみ運転する冷媒回路の構成としてもよい。この場合、切替弁８を設ける必要が無く、冷媒回路の簡素化を図ることができ、かつ、コストの低減化を図ることが可能となる。 In the first embodiment, an example in which the air conditioner 100 can perform both the cooling operation mode and the heating operation mode has been described. However, this invention is not limited to this, For example, when using the air conditioning apparatus 100 in a very cold region, it is good also as a structure of the refrigerant circuit which drive | operates only in heating operation mode. In this case, there is no need to provide the switching valve 8, the refrigerant circuit can be simplified, and the cost can be reduced.
［制御箱の冷却の説明］
　図４は、本発明の実施の形態１に係る空気調和装置の室外機の概略内部構成図である。図４に示されるように、空気調和装置１００の室外機１は、筐体２１と、筐体２１の上部に設けられた室外送風機９を備えている。筐体２１の内部には、制御箱２２、室外側熱交換器６、圧縮機５（図示省略）及び切替弁８（図示省略）が設けられている。筐体２１には、室外側熱交換器６に送風するための室外外気の通路となる風路２６が形成されている。室外送風機９は、筐体２１に形成された風路２６に室外空気を送風するものである。そして、筐体２１の上部に設けられた室外送風機９が回転駆動することにより、風路２６に示すように筐体２１内を下側から上側に向かって室外空気が流れる。 [Explanation of control box cooling]
FIG. 4 is a schematic internal configuration diagram of the outdoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention. As shown in FIG. 4, the outdoor unit 1 of the air conditioning apparatus 100 includes a housing 21 and an outdoor fan 9 provided on the top of the housing 21. Inside the casing 21, a control box 22, an outdoor heat exchanger 6, a compressor 5 (not shown), and a switching valve 8 (not shown) are provided. The casing 21 is formed with an air passage 26 serving as an outdoor outdoor air passage for sending air to the outdoor heat exchanger 6. The outdoor blower 9 blows outdoor air to the air passage 26 formed in the housing 21. Then, when the outdoor blower 9 provided at the upper portion of the casing 21 is rotationally driven, outdoor air flows in the casing 21 from the lower side to the upper side as indicated by the air passage 26.
　制御箱２２には、風路２６と接する外面にヒートシンク２３ａ及びヒートシンク２３ｂが備えられており、室外送風機９の運転時には、風路２６内を室外側熱交換器６の通過後に下側から上側に向かって流れる室外空気によってヒートシンク２３ａ及びヒートシンク２３ｂは冷却される。なお、本実施の形態１においてヒートシンクを２つ設けた例を示したが本発明はこれに限定されず、ヒートシンクを１つ又は３つ以上設けてもよい。また、本実施の形態１において室外送風機９を筐体２１の上部に設けた例を示したが、本発明はこれに限定されず、筐体２１の上部以外の場所に設けてもよい。 The control box 22 is provided with a heat sink 23 a and a heat sink 23 b on the outer surface in contact with the air passage 26. When the outdoor blower 9 is in operation, the air flows from the lower side to the upper side after passing through the outdoor heat exchanger 6. The heat sink 23a and the heat sink 23b are cooled by the outdoor air flowing toward it. In addition, although the example which provided two heat sinks in this Embodiment 1 was shown, this invention is not limited to this, You may provide one or three or more heat sinks. Moreover, although the example which provided the outdoor air blower 9 in the upper part of the housing | casing 21 was shown in this Embodiment 1, this invention is not limited to this, You may provide in places other than the upper part of the housing | casing 21. FIG.
　図５は、本発明の実施の形態１に係る空気調和装置の室外機の内部に設けられた制御箱の概略側面断面図である。図５に示されるように、制御箱２２は、ヒートシンク２３ａ、ヒートシンク２３ｂ、制御基板２７ａ、制御基板２７ｂ、温度センサー２８ａ、温度センサー２８ｂ及び電気ヒーター３１を有している。ヒートシンク２３ａは、ヒートシンク２３ｂより上部に設置されている。また、制御基板２７ａは、制御基板２７ｂより上部に設置されている。また、温度センサー２８ａは、温度センサー２８ｂより上部に設置されている。なお、本実施の形態１において、ヒートシンク、制御基板及び温度センサーを２つ設けた例を示したが、本発明はこれに限定されず、３つ以上設けても良い。このことは後述する実施の形態２についても同様である。 FIG. 5 is a schematic side sectional view of the control box provided inside the outdoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention. As shown in FIG. 5, the control box 22 includes a heat sink 23 a, a heat sink 23 b, a control board 27 a, a control board 27 b, a temperature sensor 28 a, a temperature sensor 28 b, and an electric heater 31. The heat sink 23a is installed above the heat sink 23b. The control board 27a is installed above the control board 27b. The temperature sensor 28a is installed above the temperature sensor 28b. In the first embodiment, an example in which two heat sinks, a control board, and a temperature sensor are provided has been described, but the present invention is not limited to this, and three or more heat sensors may be provided. The same applies to the second embodiment described later.
　制御基板２７ａ及び制御基板２７ｂは、空気調和装置１００を制御するものであって、例えばインバーター回路及び高調波抑制回路等が形成された基板である。制御基板２７ａは、土台２４ａを介して背面板２９に接続されている。制御基板２７ｂは、土台２４ｂを介して背面板２９に接続されている。ヒートシンク２３ａ及び制御基板２７ａは、制御箱２２の背面板２９及び土台２４ａを介して隣接して設けられている。ヒートシンク２３ｂ及び制御基板２７ｂは、制御箱２２の背面板２９及び土台２４ｂを介して隣接して設けられている。制御基板２７ａ及び制御基板２７ｂに形成される電装品は、風路２６内を通る風によって冷却されるヒートシンク２３ａ及びヒートシンク２３ｂを介して冷却される。 The control board 27a and the control board 27b control the air conditioning apparatus 100, and are boards on which, for example, an inverter circuit and a harmonic suppression circuit are formed. The control board 27a is connected to the back plate 29 via the base 24a. The control board 27b is connected to the back plate 29 through the base 24b. The heat sink 23a and the control board 27a are provided adjacent to each other through the back plate 29 and the base 24a of the control box 22. The heat sink 23b and the control board 27b are provided adjacent to each other via the back plate 29 and the base 24b of the control box 22. The electrical components formed on the control board 27a and the control board 27b are cooled via the heat sink 23a and the heat sink 23b that are cooled by the wind passing through the air path 26.
　ここで、制御箱２２内の環境温度の分布状態について説明する。通電時以降の室外機１の運転時においては、インバーター回路などの電装品の発熱が原因となって、制御箱２２の内部の空気の密度に差が生じる。そして、空気の密度の差の性質の関係で、制御箱２２の内部において、上下方向に温度分布が生じ、制御箱２２の内部の上側は、温度が高くなる。一方で、制御箱２２の内部の下側は、温度が低くなる。また、低温外気の状況下で使用される暖房運転時の室外側熱交換器６は蒸発器として機能し、室外側熱交換器６の内部を流通する冷媒の温度は外気温度より低い状態となっている。低温外気の状況下で暖房運転を行うと、室外側熱交換器６を通って冷却された室外空気が風路２６を通り、制御箱２２の下部に当たるため上述した温度分布はより助長される。 Here, the distribution state of the environmental temperature in the control box 22 will be described. During the operation of the outdoor unit 1 after energization, a difference occurs in the density of air inside the control box 22 due to heat generation of electrical components such as an inverter circuit. Due to the nature of the difference in air density, a temperature distribution is generated in the vertical direction inside the control box 22, and the temperature inside the control box 22 is high. On the other hand, the temperature inside the control box 22 is lower. Further, the outdoor heat exchanger 6 used in the heating operation used under the condition of low temperature outside air functions as an evaporator, and the temperature of the refrigerant flowing through the outdoor heat exchanger 6 is lower than the outside air temperature. ing. When the heating operation is performed under the condition of low temperature outside air, the outdoor air cooled through the outdoor heat exchanger 6 passes through the air passage 26 and hits the lower part of the control box 22, so that the above-described temperature distribution is further promoted.
　そこで、制御箱２２の内部の環境温度の低下を検知する温度センサー２８ｂを制御箱２２の内部に設ける。温度センサー２８ｂは、制御箱２２の下方、特に温度範囲の下限値が見込まれる制御基板２７ｂの最下部に配置する。このようにすることで、制御箱２２の内部の測定ポイントを少なくしながら、制御箱２２の内部に設けられた制御基板２７ａ及び制御基板２７ｂの温度状態が何度以上であるかを把握することができる。 Therefore, a temperature sensor 28 b for detecting a decrease in the environmental temperature inside the control box 22 is provided inside the control box 22. The temperature sensor 28b is disposed below the control box 22, particularly at the lowermost portion of the control board 27b where a lower limit value of the temperature range is expected. By doing so, it is possible to grasp how many times the temperature state of the control board 27a and the control board 27b provided in the control box 22 is over while reducing the number of measurement points inside the control box 22. Can do.
　ここで、制御箱２２の内部の環境温度が下がった場合に、制御基板２７ａと制御基板２７ｂとの温度、及び制御箱２２の内部の環境温度を上昇させる手段として、電気ヒーター３１を制御箱２２の内部の下方に設ける。電気ヒーター３１を制御箱２２の内部の下方、特に底部に配置することにより、環境温度が低下しやすい制御箱２２内の下方に設けられた制御基板２７ｂを加温することができる。また、制御基板２７ｂより上方に設けられた制御基板２７ａについても、電気ヒーター３１で温められた空気が自然対流により上昇することで、制御基板２７ａを加温することができる。このように、電気ヒーター３１を制御箱２２の内部の下方に設置することにより、制御箱２２全体を効率よく加温することができる。なお、電気ヒーター３１は、本発明における「発熱装置」に相当する。 Here, when the environmental temperature inside the control box 22 decreases, the electric heater 31 is used as means for increasing the temperature between the control board 27a and the control board 27b and the environmental temperature inside the control box 22. Provided below the inside of the. By disposing the electric heater 31 below the inside of the control box 22, particularly at the bottom, the control board 27b provided below the inside of the control box 22 where the environmental temperature is likely to be lowered can be heated. In addition, with respect to the control board 27a provided above the control board 27b, the air heated by the electric heater 31 is raised by natural convection, whereby the control board 27a can be heated. Thus, by installing the electric heater 31 below the inside of the control box 22, the entire control box 22 can be efficiently heated. The electric heater 31 corresponds to the “heating device” in the present invention.
　次に、電気ヒーター３１の動作について説明する。
　外気温度が低温状態の場合の室外機１において、温度センサー２８ｂによって検知された温度が、制御基板２７ａ及び制御基板２７ｂの許容温度の下限値を下回った場合、電気ヒーター３１の駆動が開始される。そして、温度センサー２８ｂによって検知された温度がある一定以上の値となった場合、例えば制御基板２７ａ及び制御基板２７ｂの許容温度の上限値を上回った場合は、電気ヒーター３１の駆動が停止される。ここで、上記の許容温度とは、制御基板２７ａ、２７ｂが正常に動作し、故障等が発生しない温度範囲のことをいう。以上のようにすることで、外気温度が低温状態の場合の室外機１において、制御箱２２の内部の環境温度、制御基板２７ａ及び制御基板２７ｂの温度を一定以上に保ち、制御回路の各電装品の劣化や寿命の減少を抑えることができる。 Next, the operation of the electric heater 31 will be described.
In the outdoor unit 1 when the outside air temperature is in a low temperature state, when the temperature detected by the temperature sensor 28b falls below the lower limit value of the allowable temperature of the control board 27a and the control board 27b, the driving of the electric heater 31 is started. . When the temperature detected by the temperature sensor 28b becomes a certain value or more, for example, when the temperature exceeds the upper limit value of the allowable temperature of the control board 27a and the control board 27b, the driving of the electric heater 31 is stopped. . Here, the allowable temperature refers to a temperature range in which the control boards 27a and 27b operate normally and no failure occurs. As described above, in the outdoor unit 1 in the case where the outside air temperature is low, the environmental temperature inside the control box 22 and the temperatures of the control board 27a and the control board 27b are kept above a certain level, Deterioration of products and reduction of service life can be suppressed.
　一方で、外気温度が高い条件で空気調和装置１００が運転される場合には、制御基板２７ａ及び制御基板２７ｂの温度範囲の上限を保護するため、制御箱２２の上方、特に制御基板２７ａの最上部に温度センサー２８ａを設置しておくのが良い。そして、温度センサー２８ａが検知した温度が、制御基板２７ａ及び制御基板２７ｂの許容温度の上限値を超える場合には、室外機１の運転負荷を下げることにより、制御基板２７ａ及び制御基板２７ｂの温度上昇を抑えることができる。 On the other hand, when the air conditioner 100 is operated under a condition where the outside air temperature is high, in order to protect the upper limit of the temperature range of the control board 27a and the control board 27b, the upper side of the control box 22, particularly the top of the control board 27a. It is preferable to install a temperature sensor 28a at the top. When the temperature detected by the temperature sensor 28a exceeds the upper limit value of the allowable temperature of the control board 27a and the control board 27b, the temperature of the control board 27a and the control board 27b is reduced by reducing the operation load of the outdoor unit 1. The rise can be suppressed.
［実施の形態１の効果］
　以上のことから、本実施の形態１によれば、空気調和装置１００の室外機１は、筐体２１と、筐体２１内に配置され、制御基板２７ａ、２７ｂを収納する制御箱２２と、制御箱２２の内部の温度を検知する温度センサー２８ａ、２８ｂと、制御箱２２の内部を加熱する発熱装置と、を備え、発熱装置は、温度センサー２８ａ、２８ｂの検知温度が制御基板２７ａ、２７ｂの許容温度の下限値を下回ったときに駆動が開始される。このようにすることで、制御箱２２内の環境温度及び電装品の温度を一定以上に保ち、各電装品の劣化及び寿命の減少を抑える空気調和装置１００の室外機１を得ることができる。 [Effect of Embodiment 1]
From the above, according to the first embodiment, the outdoor unit 1 of the air conditioning apparatus 100 includes the housing 21, the control box 22 that is disposed in the housing 21 and houses the control boards 27a and 27b, The temperature sensor 28a, 28b for detecting the temperature inside the control box 22 and a heat generating device for heating the inside of the control box 22 are provided. The heat generating device has a temperature detected by the temperature sensor 28a, 28b and the control board 27a, 27b. When the temperature falls below the lower limit of the allowable temperature, the drive is started. By doing in this way, the outdoor unit 1 of the air conditioning apparatus 100 which keeps the environmental temperature in the control box 22 and the temperature of an electrical component more than fixed, and suppresses deterioration of each electrical component and lifetime reduction can be obtained.
　また、温度センサー２８ａ、２８ｂは、制御箱２２内の上方及び下方に２つ設けられている。このようにすることで、制御箱２２の内部の環境温度を少ない温度センサーで効率よく検知することができる。 Further, two temperature sensors 28 a and 28 b are provided above and below the control box 22. By doing in this way, the environmental temperature inside the control box 22 can be efficiently detected with a small number of temperature sensors.
　また、電気ヒーター３１は、制御箱２２の下方に設けられている。このようにすることで、制御箱２２の下方で温められた空気が自然対流により上昇することで、制御箱２２の上方の空気及び電装品を効率良く温めることができる。 Moreover, the electric heater 31 is provided below the control box 22. By doing in this way, the air heated below the control box 22 rises by natural convection, so that the air above the control box 22 and electrical components can be efficiently heated.
　また、電気ヒーター３１は、温度センサー２８ａ、２８ｂのうち下方の温度センサー２８ｂの検知温度が制御箱２２に搭載されている制御基板２７ａ、２７ｂの許容温度の下限値を下回ったときに駆動が開始され、温度センサー２８ａ、２８ｂのうち上方の温度センサー２８ａの検知温度が制御箱２２に搭載されている制御基板２７ａ、２７ｂの許容温度の上限値を上回ったときに駆動が停止されるように構成する。このようにすることで、制御箱２２内の環境温度及び電装品の温度を一定に保ち、各電装品の劣化及び寿命の減少を抑える空気調和装置１００の室外機１を得ることができる。 The electric heater 31 starts driving when the temperature detected by the lower temperature sensor 28b of the temperature sensors 28a and 28b falls below the lower limit value of the allowable temperature of the control boards 27a and 27b mounted on the control box 22. The drive is stopped when the temperature detected by the upper temperature sensor 28a of the temperature sensors 28a and 28b exceeds the upper limit value of the allowable temperature of the control boards 27a and 27b mounted on the control box 22. To do. By doing in this way, the outdoor unit 1 of the air conditioning apparatus 100 which keeps the environmental temperature in the control box 22 and the temperature of an electrical component constant, and suppresses deterioration of each electrical component and a lifetime reduction can be obtained.
実施の形態２．
　本実施の形態２における空気調和装置の室外機の基本的な構成は実施の形態１における空気調和装置の室外機と同様であるため、以下、実施の形態１との相違点を中心に本実施の形態２を説明する。実施の形態１と本実施の形態２との相違点は、発熱装置が、ペルチェ素子で構成されている点である。 Embodiment 2. FIG.
Since the basic configuration of the outdoor unit of the air-conditioning apparatus in the second embodiment is the same as that of the outdoor unit of the air-conditioning apparatus in the first embodiment, the present embodiment will be mainly described below with respect to differences from the first embodiment. Form 2 will be described. The difference between the first embodiment and the second embodiment is that the heat generating device is composed of Peltier elements.
　図６は、本発明の実施の形態２に係る空気調和装置の室外機の内部に設けられた制御箱の概略側面断面図である。図６に示されるように、制御箱２２は、空気調和装置１００を制御するものである。制御箱２２は、内部にヒートシンク２３ｃ、ヒートシンク２３ｄ、制御基板２７ａ、制御基板２７ｂ、温度センサー２８ａ、温度センサー２８ｂ、ペルチェ素子２９ａ及びペルチェ素子２９ｂを有している。ペルチェ素子２９ａは、ペルチェ素子２９ｂの上方に設けられている。 FIG. 6 is a schematic side cross-sectional view of a control box provided in the outdoor unit of the air-conditioning apparatus according to Embodiment 2 of the present invention. As shown in FIG. 6, the control box 22 controls the air conditioner 100. The control box 22 includes a heat sink 23c, a heat sink 23d, a control board 27a, a control board 27b, a temperature sensor 28a, a temperature sensor 28b, a Peltier element 29a, and a Peltier element 29b. The Peltier element 29a is provided above the Peltier element 29b.
　ペルチェ素子２９ａは、ヒートシンク２３ｃを介して制御基板２７ａに接するように制御箱２２の内壁面に配置される。すなわち、ペルチェ素子２９ａは制御基板２７ａの土台を構成している。同様に、ペルチェ素子２９ｂは、ヒートシンク２３ｄを介して制御基板２７ｂに接するように制御箱２２の内壁面に配置される。すなわち、ペルチェ素子２９ｂは制御基板２７ｂの土台を構成している。 The Peltier element 29a is disposed on the inner wall surface of the control box 22 so as to be in contact with the control board 27a via the heat sink 23c. That is, the Peltier element 29a constitutes the base of the control board 27a. Similarly, the Peltier element 29b is disposed on the inner wall surface of the control box 22 so as to contact the control board 27b via the heat sink 23d. That is, the Peltier element 29b constitutes the base of the control board 27b.
［ペルチェ素子］
　外気温度が低い状況下の室外機１において、制御箱２２の下方に設置された温度センサー２８ｂの検知温度が所定の温度以下となった場合には、ペルチェ素子２９ｂのヒートシンク２３ｄと接する面が加温面となるように、ペルチェ素子２９ｂは加電される。そして、温度センサー２８ｂの検知温度が所定の温度以上となった場合には、ペルチェ素子２９ｂへの加電が停止される。このようにすることで、低温外気の状況下で使用される場合においても、制御箱２２の内部の環境温度、制御基板２７ａ及び制御基板２７ｂの温度を一定以上に保ち、制御回路の各電装品の劣化及び寿命の減少を抑制することができる。 [Peltier element]
In the outdoor unit 1 in a state where the outside air temperature is low, when the temperature detected by the temperature sensor 28b installed below the control box 22 is equal to or lower than a predetermined temperature, the surface of the Peltier element 29b that contacts the heat sink 23d is added. The Peltier element 29b is energized so as to be a warm surface. When the temperature detected by the temperature sensor 28b is equal to or higher than a predetermined temperature, the application of electricity to the Peltier element 29b is stopped. By doing in this way, even when used under the condition of low temperature outside air, the environmental temperature inside the control box 22 and the temperature of the control board 27a and the control board 27b are kept above a certain level, and each electrical component of the control circuit It is possible to suppress deterioration of the battery and a decrease in life.
　一方、外気温度が高い状況下の室外機１において、各電装品の許容上限温度を超えないようにするため、必要であれば、温度センサー２８ａを制御箱２２の上方、特に運転により温度の上昇が懸念される制御基板２７ａの最上部に配置する。そして、温度センサー２８ａによる検知温度が、制御基板２７ａの許容上限温度を超える場合には、室外機１の運転負荷を下げることにより、制御箱２２の内部の温度の上昇を抑え電装品を保護することができる。 On the other hand, in the outdoor unit 1 in a situation where the outside air temperature is high, if necessary, the temperature sensor 28a is raised above the control box 22, particularly by operation, so as not to exceed the allowable upper limit temperature of each electrical component. Is disposed on the uppermost portion of the control board 27a. When the temperature detected by the temperature sensor 28a exceeds the allowable upper limit temperature of the control board 27a, the operating load of the outdoor unit 1 is reduced to suppress the temperature rise inside the control box 22 and protect the electrical components. be able to.
　また、外気温度が高い状況下の室外機１において、室外機１の運転負荷が高く、制御基板２７ａの温度が許容上限温度を超えるような場合がある。この場合には、ペルチェ素子２９ａのヒートシンク２３ｃと接する面が冷却面となるように、ペルチェ素子２９ａが加電されることにより、室外機１の運転負荷を下げることなく、制御基板２７ａを冷却することもできる。 Also, in the outdoor unit 1 under a condition where the outdoor temperature is high, there are cases where the operating load of the outdoor unit 1 is high and the temperature of the control board 27a exceeds the allowable upper limit temperature. In this case, the control board 27a is cooled without lowering the operating load of the outdoor unit 1 by applying power to the Peltier element 29a so that the surface of the Peltier element 29a contacting the heat sink 23c becomes a cooling surface. You can also.
　上述したペルチェ素子２９ａ及びペルチェ素子２９ｂは、加電の極性を変えることにより冷却面と加熱面とを交換することが可能である。したがって、温度センサー２８ａ及び温度センサー２８ｂの検知温度を基に制御箱２２の内部の温度状態を検知し、ペルチェ素子２９ａ及びペルチェ素子２９ｂへの加電の要否、及び冷却面と加熱面との切り替えを行うことができる。このようにすることで、外気温度が低い状況下における制御基板２７ａ、２７ｂの温度の上昇を実現することができる。また、外気温度が高い状況下における制御基板２７ａ、２７ｂの温度の上昇の抑制を実現することができる。 The above-described Peltier element 29a and Peltier element 29b can exchange the cooling surface and the heating surface by changing the polarity of charging. Therefore, the temperature state inside the control box 22 is detected based on the detected temperature of the temperature sensor 28a and the temperature sensor 28b, whether the Peltier element 29a and the Peltier element 29b need to be heated, and the cooling surface and the heating surface. Switching can be done. In this way, it is possible to realize an increase in the temperature of the control boards 27a and 27b under a situation where the outside air temperature is low. In addition, it is possible to suppress an increase in the temperature of the control boards 27a and 27b under a situation where the outside air temperature is high.
［ペルチェ素子の動作］
　図７は、本発明の実施の形態２に係る空気調和装置の室外機の内部に設けられたペルチェ素子の状態を示す図である。図７に示されるように、温度センサー２８ａの検知温度において、制御基板２７ａを保護するために必要な許容上限温度の閾値をＤとする。一方、温度センサー２８ａの検知温度において、制御基板２７ａを保護するために必要な許容下限温度の閾値をＣとする。温度センサー２８ａの検知温度が閾値のＤを上回る場合は、ペルチェ素子２９ａはヒートシンク２３ｃと接する面、つまり制御基板２７ａ側が冷却面となるように加電される。また、温度センサー２８ａの検知温度が閾値のＣを下回る場合は、ペルチェ素子２９ａはヒートシンク２３ｃと接する面、つまり制御基板２７ａ側が加熱面となるように加電される。一方、温度センサー２８ａの検知温度が閾値のＤとＣとの間である場合は、ペルチェ素子２９ａは加電されない。 [Operation of Peltier element]
FIG. 7 is a diagram illustrating a state of the Peltier element provided in the outdoor unit of the air-conditioning apparatus according to Embodiment 2 of the present invention. As shown in FIG. 7, the threshold value of the allowable upper limit temperature necessary for protecting the control board 27a at the temperature detected by the temperature sensor 28a is D. On the other hand, let C be the threshold value of the allowable lower limit temperature necessary for protecting the control board 27a at the temperature detected by the temperature sensor 28a. When the detected temperature of the temperature sensor 28a exceeds the threshold value D, the Peltier element 29a is energized so that the surface in contact with the heat sink 23c, that is, the control board 27a side becomes the cooling surface. When the temperature detected by the temperature sensor 28a is lower than the threshold value C, the Peltier element 29a is energized so that the surface in contact with the heat sink 23c, that is, the control board 27a side becomes the heating surface. On the other hand, when the temperature detected by the temperature sensor 28a is between the threshold values D and C, the Peltier element 29a is not energized.
　温度センサー２８ｂの検知温度において、制御基板２７ｂを保護するために必要な許容上限温度の閾値をＢとする。一方、温度センサー２８ｂの検知温度において、制御基板２７ｂを保護するために必要な許容下限温度の閾値をＡとする。温度センサー２８ｂの検知温度が閾値のＢを上回る場合は、ペルチェ素子２９ｂはヒートシンク２３ｄと接する面、つまり制御基板２７ｂ側が冷却面となるように加電される。また、温度センサー２８ｂの検知温度が閾値のＡを下回る場合は、ペルチェ素子２９ｂはヒートシンク２３ｄと接する面、つまり制御基板２７ｂ側が加熱面となるように加電される。一方、温度センサー２８ｂの検知温度が閾値のＢとＡとの間である場合は、ペルチェ素子２９ｂは加電されない。 Suppose that the threshold value of the allowable upper limit temperature necessary for protecting the control board 27b at the temperature detected by the temperature sensor 28b is B. On the other hand, the threshold value of the allowable lower limit temperature necessary for protecting the control board 27b at the temperature detected by the temperature sensor 28b is A. When the temperature detected by the temperature sensor 28b exceeds the threshold value B, the Peltier element 29b is energized so that the surface in contact with the heat sink 23d, that is, the control board 27b side becomes the cooling surface. When the temperature detected by the temperature sensor 28b is lower than the threshold value A, the Peltier element 29b is energized so that the surface in contact with the heat sink 23d, that is, the control board 27b side becomes the heating surface. On the other hand, when the temperature detected by the temperature sensor 28b is between the threshold values B and A, the Peltier element 29b is not energized.
　次に、図７を用いて、ペルチェ素子２９ａ及びペルチェ素子２９ｂの具体的な動作例を説明する。図７に示されるように、温度センサー状態１２０ａの場合において、温度センサー２８ｂの検知温度が閾値のＡを下回っているため、ペルチェ素子２９ｂのヒートシンク２３ｄと接する面が加熱面となるように、ペルチェ素子２９ｂが加電される。一方で、温度センサー状態１２０ａの場合において、温度センサー２８ａの検知温度が閾値のＣとＤの間であるため、ペルチェ素子２９ａには加電がされない。そして、ペルチェ素子２９ｂの加温により制御箱２２の内部の温度が上昇し、温度センサー状態１２０ｂになった時には、ペルチェ素子２９ｂへの加電が終了する。 Next, a specific operation example of the Peltier element 29a and the Peltier element 29b will be described with reference to FIG. As shown in FIG. 7, in the case of the temperature sensor state 120a, the temperature detected by the temperature sensor 28b is lower than the threshold value A, so that the surface that contacts the heat sink 23d of the Peltier element 29b becomes the heating surface. The element 29b is energized. On the other hand, in the temperature sensor state 120a, since the temperature detected by the temperature sensor 28a is between the threshold values C and D, the Peltier element 29a is not charged. When the temperature inside the control box 22 rises due to the heating of the Peltier element 29b and the temperature sensor state 120b is reached, the heating to the Peltier element 29b is finished.
　このように、ペルチェ素子２９ａ及びペルチェ素子２９ｂを制御基板２７ａ及び制御基板２７ｂの冷却に用いることで、制御箱２２の外側面にヒートシンクを設ける必要がなくなり、制御箱をよりコンパクトにすることができる。また、室外機内の風路沿いに制御箱を設置しなければならないという制約を受けることが無くなり、空気調和装置の室外機の構造配置の設計の自由度を向上させることができる。 Thus, by using the Peltier element 29a and the Peltier element 29b for cooling the control board 27a and the control board 27b, it is not necessary to provide a heat sink on the outer surface of the control box 22, and the control box can be made more compact. . Moreover, the restriction that the control box must be installed along the air path in the outdoor unit is eliminated, and the degree of freedom in designing the structural arrangement of the outdoor unit of the air conditioner can be improved.
［実施の形態２の効果］
　以上のことから、本実施の形態２によれば、発熱装置は、ペルチェ素子２９ａ、２９ｂで構成され、ペルチェ素子２９ａ、２９ｂは、制御箱２２に搭載されている制御基板２７ａ、２７ｂの土台を構成している。このようにすることで、実施の形態１の効果に加えて、制御箱２２の外側面にヒートシンクを設ける必要がなくなり、制御箱をよりコンパクトにすることができる。また、室外機内の風路沿いに制御箱を設置しなければならないという制約を受けることが無くなり、空気調和装置の室外機の構造配置の設計の自由度を向上させることができる。 [Effect of Embodiment 2]
From the above, according to the second embodiment, the heat generating device is composed of the Peltier elements 29a and 29b, and the Peltier elements 29a and 29b are the bases of the control boards 27a and 27b mounted on the control box 22. It is composed. By doing in this way, in addition to the effect of Embodiment 1, it is not necessary to provide a heat sink on the outer surface of the control box 22, and the control box can be made more compact. Moreover, the restriction that the control box must be installed along the air path in the outdoor unit is eliminated, and the degree of freedom in designing the structural arrangement of the outdoor unit of the air conditioner can be improved.
　また、ペルチェ素子は、温度センサー２８ａ、２８ｂの検知温度が制御基板２７ａ、２７ｂの許容上限温度を上回るときは、制御基板２７ａ、２７ｂ側が冷却面として駆動し、温度センサー２８ａ、２８ｂの検知温度が制御基板２７ａ、２７ｂの許容下限温度を下回るときは、制御基板２７ａ、２７ｂ側が加熱面として駆動する。このようにすることで、制御箱２２内の環境温度及び電装品の温度を一定以上に保ち、各電装品の劣化及び寿命の減少を抑える空気調和装置１００の室外機１を得ることができる。 Further, when the detected temperature of the temperature sensors 28a and 28b exceeds the allowable upper limit temperature of the control boards 27a and 27b, the Peltier element is driven as the cooling surface on the control boards 27a and 27b, and the detected temperature of the temperature sensors 28a and 28b is When the temperature falls below the allowable lower limit temperature of the control boards 27a and 27b, the control boards 27a and 27b are driven as heating surfaces. By doing in this way, the outdoor unit 1 of the air conditioning apparatus 100 which keeps the environmental temperature in the control box 22 and the temperature of an electrical component more than fixed, and suppresses deterioration of each electrical component and lifetime reduction can be obtained.
　以上、実施の形態１～２について説明したが、本発明は各実施の形態の説明に限定されない。例えば、各実施の形態の全て又は一部を組み合わせることも可能である。 Although the first and second embodiments have been described above, the present invention is not limited to the description of each embodiment. For example, it is possible to combine all or some of the embodiments.
　１　室外機、２　室内機、３　冷媒主管、４　冷媒主管、５　圧縮機、６　室外側熱交換器、７　冷媒主管、８　切替弁、８ａ　第一ポート、８ｂ　第二ポート、８ｃ　第三ポート、８ｄ　第四ポート、９　室外送風機、１０　室内側熱交換器、１１　絞り装置、１２　室内送風機、２１　筐体、２２　制御箱、２３ａ～２３ｄ　ヒートシンク、２４ａ　土台、２４ｂ　土台、２６　風路、２７ａ　制御基板、２７ｂ　制御基板、２８ａ　温度センサー、２８ｂ　温度センサー、２９　背面板、２９ａ　ペルチェ素子、２９ｂ　ペルチェ素子、３１　電気ヒーター、１００　空気調和装置、１２０ａ　温度センサー状態、１２０ｂ　温度センサー状態。 1 outdoor unit, 2 indoor unit, 3 refrigerant main pipe, 4 refrigerant main pipe, 5 compressor, 6 outdoor heat exchanger, 7 refrigerant main pipe, 8 switching valve, 8a first port, 8b second port, 8c third port, 8d 4th port, 9 outdoor blower, 10 indoor heat exchanger, 11 throttle device, 12 indoor blower, 21 housing, 22 control box, 23a-23d heat sink, 24a foundation, 24b foundation, 26 airway, 27a control board 27b control board, 28a temperature sensor, 28b temperature sensor, 29 back plate, 29a Peltier element, 29b Peltier element, 31 electric heater, 100 air conditioner, 120a temperature sensor state, 120b temperature sensor state.

Claims (8)

  1. 　筐体と、
    　前記筐体内に配置され、制御基板を収納する制御箱と、
    　前記制御箱の内部の温度を検知する温度センサーと、
    　前記制御箱の内部を加熱する発熱装置と、を備え、
    　前記発熱装置は、
    　前記温度センサーの検知温度が前記制御基板の許容温度の下限値を下回ったときに駆動が開始される
    　空気調和装置の室外機。     A housing,
    A control box disposed in the housing and containing a control board;
    A temperature sensor for detecting the temperature inside the control box;
    A heating device for heating the inside of the control box,
    The heating device is
    Driving is started when the temperature detected by the temperature sensor falls below the lower limit of the allowable temperature of the control board.
  2. 　前記温度センサーは、
    　前記制御箱内の上方及び下方に２つ設けられている
    　請求項１に記載の空気調和装置の室外機。     The temperature sensor is
    The outdoor unit of the air conditioning apparatus according to claim 1, wherein two outdoor units are provided above and below the control box.
  3. 　前記発熱装置は、
    　電気ヒーターで構成されている
    　請求項１又は２に記載の空気調和装置の室外機。     The heating device is
    The outdoor unit of the air conditioning apparatus of Claim 1 or 2 comprised by the electric heater.
  4. 　前記発熱装置は、
    　前記制御箱の下方に設けられている
    　請求項１～３のいずれか一項に記載の空気調和装置の室外機。     The heating device is
    The outdoor unit for an air conditioner according to any one of claims 1 to 3, provided below the control box.
  5. 　前記発熱装置は、
    　前記温度センサーのうち下方の温度センサーの検知温度が前記制御箱に搭載されている前記制御基板の許容温度の下限値を下回ったときに駆動が開始され、
    　前記温度センサーのうち上方の温度センサーの検知温度が前記制御箱に搭載されている前記制御基板の許容温度の上限値を上回ったときに駆動が停止される
    　請求項２及び請求項２に従属する請求項３～４のいずれか一項に記載の空気調和装置の室外機。     The heating device is
    Driving is started when the detected temperature of the temperature sensor below the temperature sensor falls below the lower limit of the allowable temperature of the control board mounted on the control box,
    The drive is stopped when a detected temperature of an upper temperature sensor of the temperature sensors exceeds an upper limit value of an allowable temperature of the control board mounted on the control box. The outdoor unit for an air conditioner according to any one of claims 3 to 4.
  6. 　前記発熱装置は、
    　ペルチェ素子で構成され、
    　前記ペルチェ素子は、
    　前記制御箱に搭載されている前記制御基板の土台を構成している
    　請求項１又は２に記載の空気調和装置の室外機。     The heating device is
    Consists of Peltier elements,
    The Peltier element is
    The outdoor unit of the air conditioning apparatus of Claim 1 or 2 which comprises the foundation of the said control board mounted in the said control box.
  7. 　前記ペルチェ素子は、
    　前記温度センサーの検知温度が前記制御基板の許容上限温度を上回るときは、前記制御基板側が冷却面として駆動し、
    　前記温度センサーの検知温度が前記制御基板の許容下限温度を下回るときは、前記制御基板側が加熱面として駆動する
    　請求項６に記載の空気調和装置の室外機。     The Peltier element is
    When the detected temperature of the temperature sensor exceeds the allowable upper limit temperature of the control board, the control board side is driven as a cooling surface,
    The outdoor unit of the air conditioning apparatus according to claim 6, wherein when the temperature detected by the temperature sensor is lower than an allowable lower limit temperature of the control board, the control board side is driven as a heating surface.
  8. 　室外空気と冷媒との間で熱交換を行う室外熱交換器と、
    　前記筐体に取り付けられ、前記筐体内の風路に室外空気を供給するファンを更に備え、
    　前記制御箱は、前記室外熱交換器と前記ファンとの間の風路に配置されている
    　請求項１～７のいずれか一項に記載の空気調和装置の室外機。     An outdoor heat exchanger that exchanges heat between the outdoor air and the refrigerant;
    A fan that is attached to the housing and supplies outdoor air to an air passage in the housing;
    The outdoor unit for an air conditioner according to any one of claims 1 to 7, wherein the control box is disposed in an air path between the outdoor heat exchanger and the fan.
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US20220412590A1 (en) * 2021-06-28 2022-12-29 Haier Us Appliance Solutions, Inc. Air conditioning unit with fan performance monitoring by a temperature sensor
JP7566186B1 (en) 2024-02-02 2024-10-11 日立ジョンソンコントロールズ空調株式会社 Control device and air conditioning device

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