WO2015162790A1 - Dispositif à cycle de réfrigération et climatiseur le comportant - Google Patents

Dispositif à cycle de réfrigération et climatiseur le comportant Download PDF

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Publication number
WO2015162790A1
WO2015162790A1 PCT/JP2014/061762 JP2014061762W WO2015162790A1 WO 2015162790 A1 WO2015162790 A1 WO 2015162790A1 JP 2014061762 W JP2014061762 W JP 2014061762W WO 2015162790 A1 WO2015162790 A1 WO 2015162790A1
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WO
WIPO (PCT)
Prior art keywords
heat
heat storage
refrigerant
defrosting
refrigeration cycle
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PCT/JP2014/061762
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English (en)
Japanese (ja)
Inventor
一輝 大河内
Original Assignee
三菱電機株式会社
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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/JP2014/061762 priority Critical patent/WO2015162790A1/fr
Publication of WO2015162790A1 publication Critical patent/WO2015162790A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices

Definitions

  • the present invention relates to a refrigeration cycle apparatus including a heat storage device in a refrigerant circuit and an air conditioner including the refrigeration cycle apparatus.
  • a heat storage device is arranged in the refrigerant circuit, and the defrosting operation time is shortened by using the heat stored in the heat storage device when the outdoor heat exchanger is defrosted at a low outside air temperature.
  • a refrigeration cycle apparatus is known. Further, a defrosting operation in which a so-called reverse defrosting operation is performed in which a high-temperature and high-pressure refrigerant discharged from a compressor is switched to the outdoor heat exchanger by switching the four-way valve from the heating operation is widely adopted.
  • a separate heating unit is provided in the heat storage device as the heat source, and the heating unit is driven during the heat storage operation. Moreover, when the heat storage amount of the heat storage device is insufficient, the reverse defrosting operation is performed and the defrosting operation is performed (see, for example, Patent Document 1).
  • a heating unit for the heat storage device which is an external heat source, is separately prepared in the heat storage device.
  • the reverse defrosting operation which is a general defrosting method, the heating operation in the use side heat exchanger is stopped at the time of defrosting, and there is a problem of impairing the heating capacity.
  • This invention was made in order to solve such a problem, does not provide the heating part which heats a heat storage apparatus, and selects the defrost system corresponding to the calorie
  • the refrigeration cycle apparatus configures a refrigerant circuit in which refrigerant circulates in the order of a compressor, a flow path switching valve, a use side heat exchanger, a use side flow rate variable adjustment valve, and a heat source side heat exchanger during heating operation.
  • a regenerator cycle device comprising: a heat storage device having a heat storage material temperature detection means connected between a high pressure side refrigerant pipe and a low pressure side refrigerant pipe of a refrigerant circuit via a heat storage refrigerant pipe; A heat storage operation that absorbs heat from the high-pressure refrigerant when the high-pressure refrigerant passes through the side refrigerant pipe, and a heat-release operation that dissipates heat to the low-pressure refrigerant when the low-pressure refrigerant passes from the low-pressure side refrigerant pipe.
  • the heat storage device When performing the defrosting operation, the heat storage device has a plurality of defrosting operation modes in which the heat dissipation operation is performed, and selects one of the plurality of defrosting operation modes based on the detection temperature of the heat storage material temperature detection means, A defrosting operation is performed.
  • a heating unit for heating the heat storage device is not provided, and the heating capacity is reduced and removed by selecting a defrosting method corresponding to the amount of heat stored in the heat storage device. Defects in frost can be avoided and optimal defrosting operation can be performed.
  • FIG. 3 is a refrigerant circuit diagram in a normal heating operation mode of the refrigeration cycle apparatus according to Embodiment 1.
  • FIG. It is a refrigerant circuit figure in the thermal storage heating operation mode of the refrigerating cycle device concerning Embodiment 1.
  • FIG. 3 is a refrigerant circuit diagram in a heat dissipation defrost heating operation mode (on-defrost mode) of the refrigeration cycle apparatus according to Embodiment 1. It is explanatory drawing which showed the heating capability at the time of the thermal radiation defrost heating operation of the refrigeration cycle apparatus which concerns on Embodiment 1.
  • FIG. 3 is a refrigerant circuit diagram in a heat release defrosting operation mode (heat collection defrost mode) of the refrigeration cycle apparatus according to Embodiment 1. It is explanatory drawing which showed the heating capability at the time of the thermal radiation defrost operation mode (heat collection defrost mode) of the refrigeration cycle apparatus which concerns on Embodiment 1.
  • FIG. 3 is a control flowchart of a defrosting operation of the refrigeration cycle apparatus according to Embodiment 1.
  • FIG. 1 is a refrigerant circuit diagram in the normal heating operation mode of the refrigeration cycle apparatus according to the first embodiment.
  • the refrigeration cycle apparatus is largely composed of a heat source unit 11, a heat storage unit 14, and a use side unit 17.
  • the heat source unit 11 includes a compressor 111, a heat source side heat exchanger 112, a four-way valve 113, an accumulator 114, a bypass electromagnetic valve 115, and a heat source side heat exchanger electromagnetic valve 116.
  • the heat storage unit 14 includes a heat storage device 141, a heat storage switching valve 143, a heat storage switching electromagnetic valve 144, a heat storage material temperature detection sensor T1, and a heat storage amount variable adjustment valve EV2.
  • the use side unit 17 is comprised by the use side heat exchanger 171 and the use side flow variable adjustment valve EV1.
  • the refrigerant circuit of the refrigeration cycle apparatus includes a compressor 111, a four-way valve 113, a use-side heat exchanger 171, a use-side flow rate variable adjustment valve EV1, a heat source in the normal heating operation mode.
  • the side heat exchanger 112, the accumulator 114, and the compressor 111 are formed by connecting refrigerant piping so that the refrigerant flows sequentially. Further, on the discharge side of the compressor 111, a bypass pipe 117 branched from the main refrigerant circuit and connected to the upstream side of the heat source side heat exchanger 112 is provided.
  • a heat storage pipe 145 that connects the heat storage device 141 to the high-pressure side refrigerant pipe and the low-pressure side refrigerant pipe via a heat storage switching valve 143, and a heat dissipation pipe that is connected from the heat storage switching valve 143 to the suction pipe of the accumulator 114 A pipe 146 is provided.
  • the four-way valve 113 connects the compressor 111 and the use side heat exchanger 171, and the heat storage switching valve 143 is a refrigerant to the heat storage apparatus 141.
  • the use side flow rate variable adjustment valve EV1 is opened, the heat storage switching solenoid valve 144 is opened, the heat source side heat exchanger solenoid valve 116 is opened, the heat storage amount variable adjustment valve EV2 is closed, and the bypass solenoid is opened.
  • the operation is performed with the valve 115 closed.
  • the gas refrigerant exiting the compressor 111 is supplied to the use-side heat exchanger 171 without flowing to the heat storage device 141.
  • the high-pressure liquid refrigerant condensed in the use-side heat exchanger 171 passes through the use-side variable flow rate adjustment valve EV1, passes through the heat-source-side heat exchanger solenoid valve 116, and evaporates in the heat-source-side heat exchanger 112. 111 is aspirated.
  • FIG. 2 is a refrigerant circuit diagram in the heat storage and heating operation mode of the refrigeration cycle apparatus according to the first embodiment.
  • the heat storage heating operation mode is an operation mode for storing heat in the heat storage device 141 while continuing the heating operation.
  • the four-way valve 113 connects the compressor 111 and the use-side heat exchanger 171, and the heat storage switching valve 143 is a refrigerant to the heat storage device 141.
  • the use side flow rate variable adjustment valve EV1 is opened, the heat storage switching electromagnetic valve 144 is opened, the heat source side heat exchanger electromagnetic valve 116 is closed, the heat storage amount variable adjustment valve EV2 is opened, and the bypass solenoid is opened. The operation is performed with the valve 115 closed.
  • the gas refrigerant exiting the compressor 111 branches into a gas refrigerant flowing into the heat storage device 141 through the heat storage switching valve 143 and a gas refrigerant flowing into the use side heat exchanger 171.
  • the high-pressure liquid refrigerant condensed in the usage-side heat exchanger 171 is reduced in pressure by the usage-side flow rate variable adjustment valve EV1 and travels to the heat source side heat exchanger 112.
  • the gas refrigerant that has passed through the heat storage switching valve 143 flows into the heat storage device 141 and dissipates heat to the heat storage device 141 to become a high-pressure liquid refrigerant or a high-pressure two-phase refrigerant.
  • the heat storage amount variable regulating valve EV2 becomes a low-pressure two-phase refrigerant, merges with the refrigerant condensed and decompressed in the use side heat exchanger 171, passes through the heat source side heat exchanger electromagnetic valve 116, and passes through the heat source side heat exchanger. It evaporates at 112 and is sucked into the compressor 111.
  • the heat storage device 141 when the heat storage device 141 is heated, the gas refrigerant discharged from the compressor 111 is branched into a refrigerant that flows to the use side heat exchanger 171 and a refrigerant that flows to the heat storage device 141, and the heating operation by the use side heat exchanger 171 is performed. And the heat storage device 141 is heated to store heat. Thereby, the heat storage device 141 can be heated without providing a separate heat source while performing the heating operation.
  • FIG. 3 is a refrigerant circuit diagram in the heat dissipation defrost heating operation mode (on-defrost mode) of the refrigeration cycle apparatus according to the first embodiment.
  • the heat radiation defrosting heating operation mode is an operation mode for defrosting the heat source side heat exchanger 112 while continuing the heating operation.
  • the bypass solenoid valve 115 is opened from the normal heating operation mode or the heating heat storage operation mode, and as shown in FIG. 3, the four-way valve 113 connects the compressor 111 and the use side heat exchanger 171.
  • the heat storage switching valve 143 is switched to shut off the refrigerant to the heat storage device 141, the use side flow rate variable adjustment valve EV1 is opened, the heat storage switching electromagnetic valve 144 is opened, and the heat source side heat exchanger solenoid valve 116 is opened.
  • the engine is operated with the heat storage variable adjusting valve EV2 opened and the bypass solenoid valve 115 opened.
  • the gas refrigerant that has exited the compressor 111 is supplied to the heat source side heat exchanger 112 to perform a defrosting operation, and the gas refrigerant used for the defrosting is a low-pressure gas refrigerant, a two-phase refrigerant, or a liquid refrigerant. And is sucked into the compressor 111 through the four-way valve 113 and the accumulator 114.
  • the gas refrigerant not passing through the bypass solenoid valve 115 is condensed in the use side heat exchanger 171 to become a high-pressure liquid refrigerant, and is reduced in pressure by the use-side flow rate variable adjustment valve EV1 to be a low-pressure two-phase refrigerant. Thereafter, it passes through the heat storage device 141, evaporates due to heat radiation from the heat storage device 141, and is sucked into the compressor 111 via the heat storage switching valve 143 and the accumulator 114.
  • FIG. 4 is an explanatory diagram showing the heating capacity of the refrigeration cycle apparatus according to Embodiment 1 during the heat radiation defrost heating operation.
  • the heating capacity in the case of the refrigerant circuit not having the heat storage device 141 is indicated by a broken line
  • the heating capacity in the case of the refrigerant circuit having the heat storage device 141 is indicated by a solid line.
  • the heating capability is remarkably reduced because the heating operation is temporarily stopped by the use side heat exchanger 171 and the defrosting operation is performed.
  • the heating operation is possible even during the defrosting operation, the heating capacity is stably exhibited, and the indoor comfort during the defrosting operation is improved. .
  • FIG. 5 is a refrigerant circuit diagram in the heat release defrosting operation mode (heat collection defrost mode) of the refrigeration cycle apparatus according to Embodiment 1.
  • the heat radiation defrosting operation mode is an operation mode in which the heat stored in the heat storage device 141 is used as a heat source, the reverse operation is performed by switching the four-way valve 113 from the heating operation, and the heat source side heat exchanger 112 is defrosted.
  • the four-way valve 113 connects the compressor 111 and the use side heat exchanger 171, and the heat storage switching valve 143 is switched to shut off the refrigerant to the heat storage device 141, and the use side flow rate is variable.
  • the operation is performed with the adjustment valve EV1 closed, the heat storage switching electromagnetic valve 144 closed, the heat source side heat exchanger electromagnetic valve 116 opened, the heat storage variable variable adjustment valve EV2 opened, and the bypass electromagnetic valve 115 closed.
  • the gas refrigerant exiting the compressor 111 passes through the four-way valve 113 and is supplied to the heat source side heat exchanger 112.
  • the heat storage switching electromagnetic valve 144 is closed so that the refrigerant does not flow to the use side heat exchanger 171
  • the refrigerant condensed in the heat source side heat exchanger 112 is circulated to the heat storage device 141, and the evaporated gas refrigerant is heated.
  • the compressor 111 is caused to suck.
  • the refrigerant is not flowed to the use side heat exchanger 171 side, and all the refrigerant discharged from the compressor 111 is flowed to the heat source side heat exchanger 112 to perform defrosting.
  • the amount of heat stored in the heat storage device 141 can all be used for defrosting of the heat source side heat exchanger 112, thereby reducing the defrost time. be able to.
  • FIG. 6 is an explanatory diagram showing the heating capacity of the refrigeration cycle apparatus according to Embodiment 1 in the heat release defrosting operation mode (heat collection defrost mode).
  • the heat radiation defrosting operation mode in addition to the amount of heat supplied to the heat source side heat exchanger 112 in the reverse defrost mode, the heat collected from the heat storage device 141 is used as a heat source for defrosting. Thereby, defrosting time can be shortened. Further, when the defrosting operation is returned to the heating operation, the rise time of the heating operation can be shortened by collecting heat from the heat storage device 141.
  • FIG. 7 is a control flowchart of the defrosting operation of the refrigeration cycle apparatus according to Embodiment 1.
  • step 1 operation is started in the normal heating operation mode.
  • step 2 it is determined whether or not the outside air temperature around the heat source unit 11 is 7 ° C. or higher. If the outside air temperature ⁇ 7 ° C., it is determined that defrosting of the heat source side heat exchanger 112 is not necessary, and the routine returns to step 1 to continue the normal heating operation mode. If the outside air temperature ⁇ 7 ° C., it is determined that the heat source side heat exchanger 112 needs to be defrosted, and the process proceeds to step 3 to start measuring the accumulated time of the heating operation time (t).
  • step 4 the temperature of the heat storage material is measured by the heat storage material temperature detection sensor T1, and the amount of heat stored in the heat storage device 141 is determined.
  • the detected temperature T of the heat storage material temperature detection sensor T1 is larger than the predetermined value A, it is determined that the heat storage amount necessary for defrosting is sufficiently stored in the heat storage device 141, and the process proceeds to step 7 to continue the normal heating operation mode.
  • the detected temperature T of the heat storage material temperature detection sensor T1 is equal to or less than the predetermined value A, it is determined that the heat storage amount is insufficient, and the process proceeds to step 5 where the heat storage operation of the heat storage device 141 and the heating operation of the use side unit 17 are performed.
  • the heat storage and heating operation mode (see FIG. 2) to be performed simultaneously is started.
  • the temperature of the heat storage material charged in the heat storage device 141 is detected using the heat storage material temperature detection sensor T1.
  • the target heat storage temperature is Tm
  • the current detection temperature T of the heat storage material temperature detection sensor T1 the opening degree P of the heat storage amount variable adjustment valve EV2
  • the opening degree P of the regulating valve EV2 is controlled, and when the detected temperature T reaches the target heat storage temperature Tm, the heat storage heating operation mode is terminated and the normal heating operation mode (step 7) is shifted to.
  • ⁇ is a coefficient.
  • the target heat storage temperature Tm can be set to a predetermined value A, for example.
  • step 8 it is determined whether the heating operation integrated time (t) has exceeded ⁇ T. If it has not elapsed, the process returns to step 7, and if it has elapsed, the process proceeds to step 9.
  • an optimum defrosting mode is selected according to the detection result of the heat storage material temperature detection sensor T1.
  • the detected temperature T of the heat storage material temperature detection sensor T1 is equal to or less than the predetermined value B, it is determined that there is no heat quantity that can be collected in the heat storage device 141, and the heat source side heat exchanger 112 is operated in the reverse defrosting mode in Step 10 Perform defrosting. If the detected temperature T is higher than the predetermined value B, it is determined that heat can be collected from the heat storage device 141 and the process proceeds to step 11.
  • an optimum mode is further selected from a plurality of defrost modes using the heat storage of the heat storage device 141.
  • the heat radiation defrost heating operation mode on-defrost mode
  • the thermal radiation defrost operation mode heat collection defrost mode
  • the process proceeds to step 13 to shift to the heat radiation defrost heating operation mode (on-defrost mode), and the heat source side heat exchanger 112 is defrosted.
  • the predetermined value C is larger than the predetermined value B. Further, it is desirable that the predetermined value A is a value larger than the predetermined value C and the defrosting operation is performed with a sufficient amount of heat storage, but at least from the viewpoint of preferentially securing the heating capacity in the heat storage heating operation mode. It is also possible to set the heat storage amount to be equal to or smaller than the predetermined value C.
  • the heat storage amount of the heat storage device 141 is determined based on the detection temperature T of the heat storage material temperature detection sensor T1, and the reverse defrosting mode, the heat radiation defrosting operation mode (heat collection defrost mode), and the heat radiation are the three defrosting operation modes. Since the optimum mode is selected from the defrosting heating operation mode (on-defrost mode) for operation, it is possible to prevent defrosting failure and unexpected reduction in heating capacity.
  • a sensible heat storage material As the heat storage material built in the heat storage device 141, either a sensible heat storage material or a latent heat storage material can be adopted. From the viewpoint of heat capacity, a latent heat storage material is preferable. For example, paraffin or polyethylene glycol having a melting point higher than 0 ° C. is preferable. By using a latent heat storage material having a melting point of 0 ° C. or higher, a sufficient amount of heat during the defrosting operation can be secured.
  • the refrigerant flow path in the heat storage device 141 may have any shape as long as it can contact the heat storage material with a large area for heat transfer.
  • a spiral heat transfer tube or a plate heat exchanger shape can be considered.
  • refrigerant employed in the refrigerant circuit is not particularly limited.
  • refrigerants such as R410A, R32, R407C, R404A, and HFO1234yf can be used from natural refrigerants such as carbon dioxide, hydrocarbons, and helium. It is.
  • 11 heat source unit, 14 heat storage unit, 17 use side unit 111 compressor, 112 heat source side heat exchanger, 113 four-way valve, 114 accumulator, 115 bypass solenoid valve, 116 heat source side heat exchanger solenoid valve, 117 bypass pipe, 141 Heat storage device, 143 heat storage switching valve, 144 heat storage switching solenoid valve, 145 heat storage piping, 146 heat radiation piping, 171 usage side heat exchanger, EV1 usage side flow variable adjustment valve, EV2 heat storage variable adjustment valve, P opening, T detection temperature, T1 heat storage material temperature detection sensor, Tm target heat storage temperature.

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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

　L'invention concerne un dispositif à cycle de réfrigération qui constitue un circuit de réfrigération dans lequel, pendant une opération de chauffage, un réfrigérant circule à travers un compresseur, une soupape de commutation de passage d'écoulement, un échangeur thermique côté utilisation, une soupape de réglage variable de débit côté utilisation, et un échangeur thermique côté source de chaleur dans l'ordre indiqué, un dispositif d'accumulation thermique qui est pourvu d'un moyen de détection de température de matériau d'accumulation thermique étant raccordé, par l'intermédiaire d'une tuyauterie de réfrigérant d'accumulation thermique, entre une conduite de réfrigérant côté haute pression et une conduite de réfrigérant côté basse pression du circuit de réfrigération. Le dispositif d'accumulation thermique comporte : un fonctionnement à accumulation thermique dans lequel le réfrigérant haute pression passe depuis la conduite de réfrigérant côté haute pression, ce qui fait que la chaleur est absorbée du réfrigérant haute pression ; et un fonctionnement à dissipation thermique dans lequel un réfrigérant basse pression passe depuis la conduite de réfrigérant côté basse pression, ce qui fait que la chaleur est dissipée vers le réfrigérant basse pression. Lorsque l'échangeur thermique côté source de chaleur est dégivré, le dispositif d'accumulation thermique possède une pluralité de modes de dégivrage qui servent de fonctionnement à dissipation thermique. Un mode parmi la pluralité de modes de dégivrage est sélectionné sur la base de la température de détection du moyen de détection de température de matériau d'accumulation thermique, et le dégivrage est effectué.
PCT/JP2014/061762 2014-04-25 2014-04-25 Dispositif à cycle de réfrigération et climatiseur le comportant WO2015162790A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110836478A (zh) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 空调器除霜控制方法
CN110836474A (zh) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 空调器除霜控制方法
CN110836475A (zh) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 空调器除霜控制方法

Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS5885047A (ja) * 1981-11-17 1983-05-21 Matsushita Electric Ind Co Ltd 蓄冷熱式空気調和機の送風制御装置
JPS63306347A (ja) * 1987-06-08 1988-12-14 Matsushita Electric Ind Co Ltd ヒ−トポンプ式空気調和機の除霜制御装置
JPH07167518A (ja) * 1993-12-15 1995-07-04 Kubota Corp ヒートポンプ式の空調除湿装置
JP2000291985A (ja) * 1999-04-07 2000-10-20 Daikin Ind Ltd 空気調和装置
JP2012078015A (ja) * 2010-10-01 2012-04-19 Panasonic Corp 冷凍サイクル装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885047A (ja) * 1981-11-17 1983-05-21 Matsushita Electric Ind Co Ltd 蓄冷熱式空気調和機の送風制御装置
JPS63306347A (ja) * 1987-06-08 1988-12-14 Matsushita Electric Ind Co Ltd ヒ−トポンプ式空気調和機の除霜制御装置
JPH07167518A (ja) * 1993-12-15 1995-07-04 Kubota Corp ヒートポンプ式の空調除湿装置
JP2000291985A (ja) * 1999-04-07 2000-10-20 Daikin Ind Ltd 空気調和装置
JP2012078015A (ja) * 2010-10-01 2012-04-19 Panasonic Corp 冷凍サイクル装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110836478A (zh) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 空调器除霜控制方法
CN110836474A (zh) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 空调器除霜控制方法
CN110836475A (zh) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 空调器除霜控制方法
CN110836478B (zh) * 2018-08-17 2021-10-29 青岛海尔空调器有限总公司 空调器除霜控制方法
CN110836475B (zh) * 2018-08-17 2021-10-29 青岛海尔空调器有限总公司 空调器除霜控制方法
CN110836474B (zh) * 2018-08-17 2021-10-29 青岛海尔空调器有限总公司 空调器除霜控制方法

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