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WO2015068638A1 - Unité de source de chaleur pour dispositif de réfrigération - Google Patents

Unité de source de chaleur pour dispositif de réfrigération Download PDF

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Publication number
WO2015068638A1
WO2015068638A1 PCT/JP2014/078933 JP2014078933W WO2015068638A1 WO 2015068638 A1 WO2015068638 A1 WO 2015068638A1 JP 2014078933 W JP2014078933 W JP 2014078933W WO 2015068638 A1 WO2015068638 A1 WO 2015068638A1
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WO
WIPO (PCT)
Prior art keywords
temperature sensor
refrigerant
machine room
heat source
unit
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2014/078933
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English (en)
Japanese (ja)
Inventor
荒屋　享司
平良　繁治
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Publication of WO2015068638A1 publication Critical patent/WO2015068638A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment

Definitions

  • the present invention relates to a heat source unit of a refrigeration apparatus, and more particularly to a refrigeration apparatus capable of performing a cooling operation and a heating operation using a slightly flammable refrigerant such as R32 as a refrigerant.
  • Some refrigeration apparatuses of this type include a gas detection sensor as one means for detecting leakage of a slightly flammable refrigerant from the refrigerant pipe to the outside.
  • An object of the present invention is to provide a heat source unit of a refrigeration apparatus provided with means for reliably determining the presence or absence of refrigerant leakage by cheaper means.
  • a heat source unit of a refrigeration apparatus is a heat source unit of a refrigeration apparatus in which a machine room in which a compressor is arranged is configured as a closed space, and includes a first temperature sensor and a determination unit. I have.
  • the first temperature sensor is disposed in the lower part of the machine room.
  • a determination part determines whether the refrigerant
  • the heat source unit of the refrigeration apparatus according to the second aspect of the present invention is the heat source unit of the refrigeration apparatus according to the first aspect, in which the determination unit temporally changes the temperature of the lower part of the machine room via the first temperature sensor. When the change with time satisfies a predetermined condition, it is determined that the refrigerant has accumulated in the lower part of the machine room.
  • the heat source unit of the refrigeration apparatus according to the third aspect of the present invention is a heat source unit of the refrigeration apparatus according to the first aspect, and further includes a second temperature sensor.
  • the second temperature sensor is disposed at a position higher than the position of the first temperature sensor in the machine room.
  • a determination part determines with the refrigerant
  • this heat source unit by arranging the second temperature sensor at a position higher than the position of the first temperature sensor, for example, the detection value of the second temperature sensor is stabilized, and the change in the detection value of the first temperature sensor is large. In this case, it is highly possible that the refrigerant has accumulated, so it can be determined that the refrigerant has accumulated in the lower part of the machine room.
  • the heat source unit of the refrigeration apparatus is the heat source unit of the refrigeration apparatus according to the first aspect, and further includes a plurality of temperature sensors.
  • the plurality of temperature sensors are arranged in the vertical direction at a position higher than the position of the first temperature sensor.
  • a determination part determines with the refrigerant
  • the detection values of the plurality of temperature sensors arranged in the vertical direction are stable when the temperature inside the machine room is stable.
  • the difference between the detected values is different from that at the stable time, so that it can be determined that the refrigerant is accumulated in the lower part of the machine room.
  • the refrigerant can be used without using an expensive gas detection sensor. The presence or absence of leakage can be determined.
  • the second temperature sensor by arranging the second temperature sensor at a position higher than the position of the first temperature sensor, for example, the detection value of the second temperature sensor is stabilized, When the change in the detected value of the one temperature sensor is large, it is highly possible that the refrigerant has accumulated, so it can be determined that the refrigerant has accumulated in the lower part of the machine room.
  • the detected values of the plurality of temperature sensors arranged in the vertical direction are different in the detected values of the temperature sensors when the temperature inside the machine room is stable. Although it is stable but the refrigerant is accumulated in the lower part of the machine room, the difference between the detected values is different from that in the stable state, so it can be determined that the refrigerant is accumulated in the lower part of the machine room.
  • the control block diagram of a control part The front view which shows the structure inside an outdoor unit.
  • the top view which shows the structure inside an outdoor unit.
  • the control flow figure of leak detection control concerning a modification.
  • FIG. 1 is a refrigerant circuit diagram of a refrigeration apparatus 1 equipped with an outdoor unit 3 as a heat source unit according to an embodiment of the present invention.
  • the refrigeration apparatus 1 is an air conditioner, and can perform a cooling operation and a heating operation by performing a vapor compression refrigeration cycle.
  • the refrigeration apparatus 1 is configured by connecting an outdoor unit 3 and an indoor unit 2 via a liquid refrigerant communication tube 26 and a gas refrigerant communication tube 27.
  • R32 which is a kind of HFC refrigerant
  • the enclosed refrigerant is not limited to R32, and can be selected as appropriate.
  • the indoor unit 2 is installed indoors.
  • the indoor unit 2 has an indoor heat exchanger 11.
  • the indoor heat exchanger 11 is a heat exchanger that functions as an evaporator during cooling operation to cool indoor air and functions as a radiator during heating operation to heat indoor air.
  • the liquid side of the indoor heat exchanger 11 is connected to the liquid refrigerant communication tube 26, and the gas side of the indoor heat exchanger 11 is connected to the gas refrigerant communication tube 27.
  • the indoor unit 2 has an indoor fan 42.
  • the indoor fan 42 is driven by the indoor fan motor 43, sucks indoor air into the indoor unit 2, and exchanges heat with the refrigerant in the indoor heat exchanger 11, and then supplies the indoor air as supply air.
  • the indoor unit 2 includes an indoor side control unit 45 that controls the operation of each unit constituting the indoor unit 2.
  • the indoor side control unit 45 includes a microcomputer and a memory for controlling the indoor unit 2, exchanges control signals and the like with a remote controller (not shown), and the outdoor unit 3. Control signals and the like are exchanged via the transmission line 5a.
  • Outdoor unit 3 The outdoor unit 3 is installed outdoors.
  • the outdoor unit 3 includes a compressor 33, a four-way switching valve 34, an outdoor heat exchanger 35, an expansion valve 36, a liquid side closing valve 37, and a gas side closing valve 38.
  • the compressor 33 is a device that compresses the low-pressure refrigerant in the refrigeration cycle until the pressure becomes high.
  • the compressor 33 has a suction pipe 21 connected to the suction side and a discharge pipe 22 connected to the discharge side.
  • the suction pipe 21 connects the suction side of the compressor 33 and the first port 34 a of the four-way switching valve 34.
  • the suction pipe 21 is provided with an accumulator 29.
  • the discharge pipe 22 connects the discharge side of the compressor 33 and the second port 34 b of the four-way switching valve 34.
  • the four-way switching valve 34 switches the direction of the refrigerant flow in the refrigerant circuit.
  • the four-way switching valve 34 can function the outdoor heat exchanger 35 as a refrigerant radiator and the indoor heat exchanger 11 as a refrigerant evaporator during cooling operation.
  • the four-way switching valve 34 communicates the second port 34b and the third port 34c, and communicates the first port 34a and the fourth port 34d.
  • the discharge pipe 22 of the compressor 33 and the first gas refrigerant pipe 23 of the outdoor heat exchanger 35 are connected, and the suction pipe 21 of the compressor 33 and the second gas refrigerant pipe 24 are connected (FIG. 1). (See the solid line of the four-way selector valve 34).
  • the four-way switching valve 34 performs switching so that the outdoor heat exchanger 35 functions as a refrigerant evaporator and the indoor heat exchanger 11 functions as a refrigerant radiator during heating operation.
  • the four-way selector valve 34 communicates the second port 34b and the fourth port 34d and communicates the first port 34a and the third port 34c.
  • the discharge pipe 22 of the compressor 33 and the second gas refrigerant pipe 24 are connected, and the suction pipe 21 of the compressor 33 and the first gas refrigerant pipe 23 of the outdoor heat exchanger 35 are connected (FIG. 1). (Refer to the broken line of the four-way switching valve 34).
  • the first gas refrigerant pipe 23 is a refrigerant pipe that connects the third port 34 c of the four-way switching valve 34 and the gas side of the outdoor heat exchanger 35, and the second gas refrigerant pipe 24 is connected to the four-way switching valve 34.
  • This is a refrigerant pipe connecting the fourth port 34d and the gas refrigerant communication pipe 27 side.
  • Outdoor heat exchanger 35 is a heat exchanger that functions as a refrigerant radiator that uses outdoor air as a cooling source during cooling operation, and that functions as a refrigerant evaporator that uses outdoor air as a heating source during heating operation.
  • the outdoor heat exchanger 35 has a liquid side connected to the liquid refrigerant pipe 25 and a gas side connected to the first gas refrigerant pipe 23.
  • the liquid refrigerant pipe 25 is a refrigerant pipe that connects the liquid side of the outdoor heat exchanger 35 and the liquid refrigerant communication pipe 26 side.
  • the expansion valve 36 is a device that decompresses high-pressure refrigerant in the refrigeration cycle to low pressure in the refrigeration cycle during cooling operation.
  • the expansion valve 36 is a device that reduces the high-pressure refrigerant in the refrigeration cycle that has radiated heat in the indoor heat exchanger 11 to the low pressure in the refrigeration cycle during heating operation.
  • the expansion valve 36 is provided in a portion of the liquid refrigerant pipe 25 near the liquid side closing valve 37.
  • Liquid side closing valve 37 and gas side closing valve 38 are valves provided at connection ports with the liquid refrigerant communication pipe 26 and the gas refrigerant communication pipe 27.
  • the liquid side closing valve 37 is provided at the end of the liquid refrigerant pipe 25
  • the gas side closing valve 38 is provided at the end of the second gas refrigerant pipe 24.
  • Outdoor fan 40 The outdoor fan 40 sucks outdoor air into the outdoor unit 3, exchanges heat with the refrigerant in the outdoor heat exchanger 35, and then discharges the air to the outside.
  • a propeller fan driven by an outdoor fan motor 41 or the like is used as the outdoor fan 40.
  • Outdoor control unit 50 The outdoor side controller 50 controls the operation of each part constituting the outdoor unit 3.
  • the outdoor control unit 50 includes a command unit 51 for controlling the outdoor unit 3, a microcomputer as the determination unit 53 (see FIG. 2), and a memory as the storage unit 52.
  • the control signal and the like can be exchanged with the indoor control unit 45 of the vehicle via the transmission line 5a.
  • FIG. 2 is a control block diagram of the control unit 5.
  • the control part 5 is comprised by the indoor side control part 45, the outdoor side control part 50, and the transmission line 5a which connects between both, and performs operation control of the freezing apparatus 1 whole.
  • control unit 5 rotates the rotation speed of the compressor 33, the switching operation of the four-way switching valve 34, the opening degree of the expansion valve 36, the rotation speed of the outdoor fan motor 41, And the rotation speed of the indoor fan motor 43 can be controlled.
  • FIG. 3 is a front view showing the internal structure of the outdoor unit 3.
  • FIG. 4 is a plan view showing the internal structure of the outdoor unit 3. 3 and 4, the outdoor unit 3 forms an outer shell by a casing 31.
  • the casing 31 houses the outdoor heat exchanger 35, the compressor 33, the outdoor fan 40, and the electrical component box 15.
  • the inside of the casing 31 is partitioned into a blower chamber SP2 and a machine chamber SP1 by a partition plate 310.
  • the right side of the partition plate 310 is the machine chamber SP1 and the left side is the blower chamber SP2. .
  • the blower room SP2 is a space in which the outdoor heat exchanger 35 and the outdoor fan 40 are arranged.
  • the blower room SP2 is configured so that air can easily enter and exit from the front and rear, and the air taken in from the outside by the outdoor fan 40 passes therethrough.
  • the electrical component box 15 is arranged so as to straddle the partition plate 310.
  • a control board (not shown) constituting the control unit 5 is accommodated in the electrical component box 15.
  • the electrical component box 15 also houses a heat sink 17 for releasing heat from the heat generating components on the control board. However, a part of the heat sink 17 protrudes downward from the lower surface of the electrical component box 15 to provide a blower chamber. It is located above the right end of SP2.
  • the protruding direction of the heat sink 17 is not limited to “downward from the lower surface of the electrical component box 15”, and the configuration thereof can be selected as appropriate.
  • (2-2) Machine room SP1 The machine room SP1 is partitioned from the blower room SP2 by a partition plate 310 made of sheet metal, and is configured as a closed space so that it is difficult for wind and rain to enter. Therefore, it is a space with little ventilation. Inside the machine room SP1, there are disposed high components such as the compressor 33, the four-way switching valve 34 (see FIG. 1), the expansion valve 36 (see FIG. 1), and the like that need to be protected from wind and rain.
  • the four temperature sensors 60 are arranged in the vertical direction along the side surface.
  • the four temperature sensors 60 are referred to as a first temperature sensor 61, a second temperature sensor 62, a third temperature sensor 63, and a fourth temperature sensor 64 in order from the bottom surface side.
  • the detection values of the first temperature sensor 61, the second temperature sensor 62, the third temperature sensor 63, and the fourth temperature sensor 64 are used for the determination of refrigerant leakage.
  • the height position of the first temperature sensor 61 corresponds to the bottom height of the compressor 33. Further, the height position of the second temperature sensor 62 corresponds to a position slightly higher than the center of the body portion of the compressor 33. The height position of the third temperature sensor 63 corresponds to a position slightly lower than the midpoint between the apex of the compressor 33 and the bottom surface of the electrical component box 15. The height position of the fourth temperature sensor 64 corresponds to the height of the bottom of the electrical component box 15. Note that these height positions are only a guide and are preferably changed as appropriate according to the size of the machine room SP1.
  • the outdoor control unit 50 of the control unit 5 is provided with a determination unit 53 that determines whether or not refrigerant has accumulated in the lower part of the machine room SP1 from the detection value of the first temperature sensor 61.
  • determination of refrigerant leakage will be described.
  • FIG. 5 is a control flow diagram of leakage detection control.
  • the determination unit 53 determines whether or not the detection value T1 of the first temperature sensor 61 is smaller than the threshold value Ta in step S1, and proceeds to step S2 when T1 ⁇ Ta, and when T1 ⁇ Ta is not satisfied. Continues its decision.
  • the determination unit 53 sets a timer in step S2, and measures an elapsed time t after determining T1 ⁇ Ta.
  • the determination unit 53 determines whether or not the elapsed time t has reached the predetermined time ta in step S3. When the predetermined time ta has been reached, the process proceeds to step S4, and when the predetermined time ta has not been reached. Continues its decision.
  • the determination unit 53 determines whether or not the detection value T1 of the first temperature sensor 61 is smaller than Ta in step S4. If T1 ⁇ Ta, the process proceeds to step S5. Proceed to S7.
  • step S5 determines in step S5 that “refrigerant is accumulated below the machine room SP”. The basis for this determination will be described with reference to FIGS. 6A and 6B.
  • FIG. 6A is a graph showing changes in the detected value of the first temperature sensor 61 when the refrigerant is leaking.
  • FIG. 6B is a graph showing changes in the detection value of the first temperature sensor 61 due to noise when the refrigerant is not leaking.
  • the detection value T1 of the first temperature sensor 61 is lower than Ta, and a predetermined time ta has elapsed since T1 ⁇ Ta. After that, when T1 ⁇ Ta is maintained, it can be determined that the refrigerant has accumulated in the lower part of the machine room SP1. That is, it can be detected that the refrigerant is leaking.
  • the determination unit 53 performs an alarm notifying the occurrence of “refrigerant leakage” in step S6.
  • the alarm may be an alarm sound or a message displayed on the remote control display.
  • the detection value of the first temperature sensor 61 is affected by noise, as shown in FIG. 6B, it is determined that the temperature in the lower part of the machine room SP1 has decreased, and a timer is set. However, since the change in this case is transient, the detected value of the first temperature sensor 61 outputs the original temperature below the machine room SP1 before the predetermined time ta elapses.
  • step S4 determines in step S4 that the detection value T1 of the first temperature sensor 61 is not smaller than Ta
  • the determination unit 53 proceeds to step S7 and determines that “no refrigerant has accumulated in the lower part of the machine room SP”. To do.
  • step S8 the timer setting is canceled, the process returns to step S1, and the refrigerant leakage detection control is continued.
  • the second temperature sensor 62, the third temperature sensor 63, and the fourth temperature sensor 64 are arranged in the vertical direction above the first temperature sensor 61. Even if it evaporates at the leakage location without accumulating in the lower part of the machine room SP1, any one of the detected values of the first temperature sensor 61, the second temperature sensor 62, the third temperature sensor 63, and the fourth temperature sensor 64 is When the state of FIG. 6A is shown, it can be determined that the refrigerant is leaking. Further, since the difference between the detection values of the temperature sensors shows a value different from that at the time of stabilization, it can be estimated that the refrigerant has cooled in the machine room SP1.
  • the detected value T1 of the first temperature sensor 61 is smaller than the threshold value Ta, and if T1 ⁇ Ta even after a predetermined time ta has elapsed since T1 ⁇ Ta, the refrigerant is in the machine room SP1. Judge that it has accumulated at the bottom. Therefore, it is possible to determine the presence or absence of refrigerant leakage based on the detection value of the first temperature sensor 61 without using an expensive gas detection sensor.
  • FIG. 7A is a graph showing changes in detection values of the first temperature sensor 61 and the second temperature sensor 62 in the first mode.
  • FIG. 7B is a graph showing changes in detection values of the first temperature sensor 61 and the second temperature sensor 62 in the second mode.
  • the first mode occurs when the leaked refrigerant has reached the height position of the first temperature sensor 61 but has not reached the height position of the second temperature sensor 62.
  • the detection value of the second temperature sensor 62 is stable, and the detection value of the first temperature sensor 61 changes greatly.
  • the second mode occurs when the leaked refrigerant remains at the height position of the second temperature sensor 62.
  • the second mode is similarly changed although the detection values of the first temperature sensor 61 and the second temperature sensor 62 are different.
  • the determination unit 53 first responds to the control with respect to the first mode, but starts the control with respect to the second mode when determining that the mode is not the first mode.
  • the difference ⁇ T between the detection values of the first temperature sensor 61 and the second temperature sensor 62 is monitored, and when ⁇ T becomes equal to or greater than a predetermined threshold value ⁇ Ts, the refrigerant accumulates in the lower part of the machine room SP1. Is determined.
  • the detected value T1 of the first temperature sensor 61 is lower than Ta and T1 ⁇ Ta is maintained even after a predetermined time ta has elapsed since T1 ⁇ Ta.
  • T1 ⁇ Ta is maintained even after a predetermined time ta has elapsed since T1 ⁇ Ta.
  • FIG. 8 is a control flow diagram of leakage detection control according to a modification.
  • the determination part 53 acquires the detection value T1 of the 1st temperature sensor 61 by step S11, and progresses to step S12.
  • step S12 the determination unit 53 acquires the detection value T2 of the second temperature sensor 62, and proceeds to step S13.
  • step S14 the determination unit 53 determines whether or not ⁇ T is equal to or greater than the threshold value ⁇ Ts. If ⁇ T ⁇ ⁇ Ts, the process proceeds to step S15. If ⁇ T ⁇ ⁇ Ts, the process proceeds to step S24.
  • the determination unit 53 determines “is the first mode” in step S15, proceeds to step S29, and issues a refrigerant leakage warning to the user.
  • step S24 determines whether or not the detected value T1 of the first temperature sensor 61 is smaller than Ta in step S24.
  • T1 ⁇ Ta the process proceeds to step S25, and when T1 ⁇ Ta, the process returns to step S11.
  • the determination unit 53 sets a timer in step S25, and measures an elapsed time t after determining T1 ⁇ Ta.
  • the determination unit 53 determines whether or not the elapsed time t has reached the predetermined time ta in step S26. When the predetermined time ta has been reached, the process proceeds to step S27, and when the predetermined time ta has not been reached. Continues its decision.
  • the determination unit 53 determines whether or not the detection value Ts1 of the first temperature sensor 61 is smaller than Ta in step S27. If T1 ⁇ Ta, the process proceeds to step S28, and if T1 ⁇ Ta, the determination unit 53 proceeds to step S28. Proceed to S37.
  • the determination unit 53 determines “is the second mode” in step S28, proceeds to step S29, and issues a refrigerant leakage warning to the user.
  • step S27 when the determination unit 53 determines in step S27 that the detection value T1 of the first temperature sensor 61 is not smaller than Ta, the determination unit 53 proceeds to step S7 and determines that “no refrigerant has accumulated in the lower part of the machine room SP”. To do.
  • step S38 the timer setting is canceled and the process returns to step S11 to continue the refrigerant leakage detection control.
  • the present invention is widely applicable to a refrigeration apparatus that can perform a cooling operation and a heating operation using a slightly flammable refrigerant or a flammable refrigerant.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

Le problème abordé par la présente invention consiste à fournir une unité de source de chaleur qui est destinée à un dispositif de réfrigération et qui est pourvue d'un moyen pour déterminer de façon fiable la présence ou l'absence d'une fuite de frigorigène à l'aide d'un moyen plus économique. Dans une unité extérieure (3), quand la valeur de détection (T1) d'un premier capteur de température (61) est inférieure à un seuil (Ta) et que l'équation T1 < Ta est toujours valable après qu'un temps prédéterminé (ta) s'est écoulé depuis que T1 < Ta s'est vérifié, il est déterminé que du frigorigène s'est déversé en dessous d'une chambre de la machine (SP1). Par conséquent, il est possible de déterminer la présence ou l'absence d'une fuite de frigorigène sur la base de la valeur de détection du premier capteur de température (61) sans utiliser un capteur de détection de gaz coûteux.
PCT/JP2014/078933 2013-11-06 2014-10-30 Unité de source de chaleur pour dispositif de réfrigération Ceased WO2015068638A1 (fr)

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JP2013230044A JP5761306B2 (ja) 2013-11-06 2013-11-06 冷凍装置の熱源ユニット
JP2013-230044 2013-11-06

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CN106403189A (zh) * 2016-09-29 2017-02-15 广东美的制冷设备有限公司 一种空调器制冷剂泄漏的检测方法及空调器
EP3457044A4 (fr) * 2016-05-13 2019-05-15 Mitsubishi Electric Corporation Climatiseur
JP2024051923A (ja) * 2022-09-30 2024-04-11 ダイキン工業株式会社 空調機制御システム、情報処理装置及び空調機制御方法

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JP5892199B2 (ja) * 2014-06-27 2016-03-23 ダイキン工業株式会社 空調室内機
JP6065962B1 (ja) * 2015-10-28 2017-01-25 三菱電機株式会社 冷凍サイクル装置
WO2018131085A1 (fr) * 2017-01-11 2018-07-19 三菱電機株式会社 Entrepôt réfrigéré
CN106895561B (zh) * 2017-02-28 2019-07-30 广东美的制冷设备有限公司 一种检测空调器冷媒泄漏的方法、空调器的控制装置和空调器
CN109654652B (zh) * 2018-11-17 2020-05-19 华中科技大学 一种基于数据挖掘技术的空调器制冷/热量预测方法
CN109668273B (zh) * 2018-12-19 2022-01-25 广东美的制冷设备有限公司 制冷装置控制方法、制冷装置以及存储介质

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JP2002098346A (ja) * 2000-09-26 2002-04-05 Daikin Ind Ltd 空気調和機の室内機
JP2013047591A (ja) * 2011-08-29 2013-03-07 Noritz Corp ヒートポンプ給湯装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3457044A4 (fr) * 2016-05-13 2019-05-15 Mitsubishi Electric Corporation Climatiseur
CN106403189A (zh) * 2016-09-29 2017-02-15 广东美的制冷设备有限公司 一种空调器制冷剂泄漏的检测方法及空调器
JP2024051923A (ja) * 2022-09-30 2024-04-11 ダイキン工業株式会社 空調機制御システム、情報処理装置及び空調機制御方法

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