CN106403373A - Heat pump system, control method and refrigerating unit - Google Patents

Heat pump system, control method and refrigerating unit Download PDF

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Publication number
CN106403373A
CN106403373A CN201610911137.1A CN201610911137A CN106403373A CN 106403373 A CN106403373 A CN 106403373A CN 201610911137 A CN201610911137 A CN 201610911137A CN 106403373 A CN106403373 A CN 106403373A
Authority
CN
China
Prior art keywords
compressor
heat pump
heat exchanger
switch
bypass line
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.)
Pending
Application number
CN201610911137.1A
Other languages
Chinese (zh)
Inventor
李庆
梁爽
梁爽一
顾裕林
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.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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 Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201610911137.1A priority Critical patent/CN106403373A/en
Publication of CN106403373A publication Critical patent/CN106403373A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B29/00Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/37Capillary tubes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plant or systems
    • F25B49/022Compressor control arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/26Problems to be solved characterised by the startup of the refrigeration cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/02Compressor control
    • F25B2600/025Compressor control by controlling speed
    • F25B2600/0251Compressor control by controlling speed with on-off operation

Abstract

The invention relates to a heat pump system, a control method and a refrigerating unit. The heat pump system comprises a compressor, an outdoor heat exchanger, a first throttling device and an indoor heat exchanger. The compressor, the outdoor heat exchanger, the first throttling device and the indoor heat exchanger form a refrigerant circulation system. The heat pump system further comprises a bypass pipeline, the two ends of the bypass pipeline are connected with an inlet and an outlet of the compressor separately, and the bypass pipeline is provided with a first switch device used for opening and closing the bypass pipeline. According to the refrigerant circulation system, balance between high pressure and low pressure can be guaranteed before the compressor is started again, and normal starting power is ensured.

Description

Heat pump, control method and refrigeration unit
Technical field
The present invention relates to a kind of heat pump, control method and refrigeration unit, more particularly to one kind are it can be avoided that freeze Heat pump, control method and refrigeration unit that compressor flooded starts in circulation and compressor cannot normally start.
Background technology
The kind of refrigeration cycle system forming is sequentially connected by compressor, condenser, main valve door gear, throttling arrangement and vaporizer System is known, flows through formation kind of refrigeration cycle successively by making coolant in above-mentioned part.In this known kind of refrigeration cycle, In order to ensure the compressor in cooling cycle system in normal startup can stable operation it is desirable to machine after compressor shutdown So that the pressure between compressor inlet and outlet reaches balance before group is again started up.The kind of refrigeration cycle of the overwhelming majority in the market Unit is all to realize high-low pressure balance by the main valve door gear being not related on closed loop stream when shutting down.However, In the case that main valve door gear is not related to and closes, the high-pressure liquid coolant in condenser may flow to compressor, thus causing Compressor flooded starts.For this reason, having some units when shutting down, the main valve door gear on pipeline can be closed and by vaporizer Coolant be pumped in high pressure side condenser and the fluid reservoir of kind of refrigeration cycle.In this case, when unit is again started up, beat When opening main valve door gear, the high-low pressure difference between compressor inlet and outlet cannot reach balance at short notice, and then leads Cause compressor start failure, normal starting rate is low.
Content of the invention
Present invention is primarily targeted at providing a kind of heat pump that ensure that the normal startup of compressor, control method And refrigeration unit.
To achieve these goals, the present invention provides a kind of heat pump, including compressor, outdoor heat exchanger, first segment Stream device and indoor heat exchanger, described compressor, outdoor heat exchanger, first throttle device and indoor heat exchanger form coolant Blood circulation, also includes bypass line, and the two ends of described bypass line connect the inlet and outlet of described compressor respectively, described First switch device for opening and closing described bypass line is provided with bypass line.
Alternatively, described bypass line is additionally provided with the second throttling device connected with described first switch device.
Alternatively, described second throttling device is capillary tube or choke valve.
Alternatively, the connecting line between described outdoor heat exchanger and described indoor heat exchanger is provided with second switch dress Put.
Alternatively, described heat pump is single refrigeration system;
It is provided with the refrigeration entrance pipe of described outdoor heat exchanger and only allow coolant to outdoor heat exchanger refrigeration entrance side The first check valve to flowing;And/or,
Heating of described indoor heat exchanger is provided with the 3rd switching device on entrance pipe.
Alternatively, described heat pump is refrigerating and heating systems;
4th switching device is provided with the refrigeration entrance pipe of described outdoor heat exchanger, described 4th switching device is used for When heat pump enters stopped status by refrigerating state, in the refrigeration entrance pipe of cut-out outdoor heat exchanger, coolant is to compressor The stream in direction;And/or,
Heating of described indoor heat exchanger is provided with the 5th switching device on entrance pipe, described 5th switching device is used for When heat pump enters stopped status by the state that heats, cut-out indoor heat exchanger heat in entrance pipe coolant to compressor The stream in direction.
Present invention also offers the control method of above-mentioned heat pump, when receiving starting-up signal, control described first Described bypass line is opened by switching device.
Alternatively, when receiving starting-up signal, described first switch device is controlled to open described bypass line and hold Compressor is opened after continuous first scheduled time or described compressor inlet and outlet pressure balance.
Alternatively, the connecting line between described outdoor heat exchanger and described indoor heat exchanger is provided with second switch dress Put, when receiving off signal, close described second switch device and after continuing for second scheduled time or described heat pump system When the low-pressure lateral pressure of system is less than predetermined value, close compressor.
Present invention also offers the refrigeration unit using above-mentioned heat pump.
According to the heat pump in the present invention, it is provided with bypass line, when heat pump starts, can beat bypass line Open, to balance the pressure reduction between compressor inlet and outlet at short notice, with can be at short notice when meeting compressor start up condition Compressor start is got up, improves the startup success rate of compressor.Make it possible to, in shutdown, first close described second switch The device scheduled time turns off compressor, thus avoiding compressor flooded starts to be possibly realized.According to the heat pump system in the present invention In the control method of system, the connecting line between described outdoor heat exchanger and described indoor heat exchanger is provided with second switch Device, when receiving off signal, closes described second switch device and after continuing for second scheduled time or described heat pump When the low-pressure lateral pressure of system is less than predetermined value, close compressor, as such, it is possible to the coolant in vaporizer is pumped to having relatively In the condenser of high refrigerant pressure, thus storing a large amount of coolant thus leading to compressor band liquid to open in vaporizer when avoiding shutting down Dynamic;And, due to being provided with bypass line, also it is avoided that during compressor start due between compressor inlet and outlet simultaneously The problem that high-low pressure is poor and cannot start.
Brief description
The Figure of description constituting the part of the application is used for providing a further understanding of the present invention, and the present invention shows Meaning property embodiment and its illustrate for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the system schematic of the heat pump according to the present invention.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling:
1st, compressor;2nd, condenser;3rd, vaporizer;4th, first throttle device;5th, second switch device;6th, the second throttling dress Put;7th, first switch device;8th, check valve;9th, bypass line.
Specific embodiment
In the following description, a large amount of concrete details are given to provide more thorough understanding of the invention.So And, it will be apparent to one skilled in the art that the present invention can one or more of these details and be able to Implement.In other examples, in order to avoid obscuring with the present invention, some technical characteristics well known in the art are not entered Row description.
In order to thoroughly understand the present invention, detailed structure will be proposed in following description.Obviously, embodiments of the invention It is not limited to the specific details that those skilled in the art is familiar with.Presently preferred embodiments of the present invention is described in detail as follows, so And in addition to these describe in detail, the present invention can also have other embodiment.
The invention provides a kind of heat pump, it is additionally provided with bypass pipe outside including the coolant circulating system of routine Road, the two ends of bypass line connect the inlet and outlet of compressor respectively, and bypass line is provided with for opening and closing side Bypass line so, when heat pump starts, can be opened, to balance at short notice by the first switch device on siphunculus road Pressure reduction between compressor inlet and outlet, can carry at short notice by compressor start when meeting compressor start up condition The high startup success rate of compressor.
The heat pump that the present invention provides can be single refrigeration system, single heating, refrigerating and heating systems.
The embodiment of single refrigeration system shown in Figure 1.The heat pump of the wherein present invention is preferably used for cold The refrigeration unit in storehouse.As shown in Figure 1, the compressor 1 as cold medium compressor is had according to the heat pump of the present invention;Position In the condenser 2 of compressor 1 outlet downstream side, wherein this condenser 2 is preferably located in the outside of freezer, so that coolant is cold The heat being discharged when there is condensation in condenser 2 is directly arranged to outdoor environment;On condenser 2 downstream pipe second opens Close device 5, preferably this second switch device 5 is electromagnetic valve, above-mentioned electromagnetic valve may be electrically connected to the control electricity of heat pump Controlled with realizing the break-make of electromagnetic valve according to preset program in the (not shown) of road;Positioned at second switch device 5 downstream First throttle device 4, first throttle device 4 is used for the saturated liquid under condensing pressure in condenser or subcooled liquid throttling After be reduced to evaporating pressure and evaporating temperature, the change according to load simultaneously, adjust enter vaporizer in coolant flow, excellent Selection of land, this first throttle device 4 is choke valve;Positioned at the vaporizer 3 in first throttle device 4 downstream, wherein this vaporizer 3 is excellent Selection of land is located at the indoor of freezer, and when coolant evaporation endothermic in vaporizer, the blower fan that vaporizer is set up (do not show by figure Go out) open so that air constantly enters vaporizer to carry out heat exchange with coolant, and the air turning cold after heat release is sent back to In freezer, thus reducing the purpose of temperature of ice house;The refrigerant exit of vaporizer 3 is passed through pipeline and is connected with the import of compressor 1 Connect, thus gaseous coolant will be evaporated in vaporizer and suck in compressor 1 compress, thus achieve coolant in systems Recycle.Preferably, it is also provided with the sensor for monitoring cold storehouse temperature in this freezer.
As shown in Figure 1, the pipeline between the outlet of the compressor 1 of the present invention and condenser 2 is provided with check valve 8, specifically, this check valve 8 only allows the one-way flow from compressor 1 to condenser 2, and completely cuts off the high pressure in condenser 2 Coolant to the flowing of compressor outlet and pressure conduction, thus reversely in cut-off condenser 2 outlet to compressor 1 for the coolant pressure Power affects.It is provided with bypass line 9 between the inlet and outlet of compressor 1, this bypass line 9 allows in compressor 1 not work When making, coolant can flow to compressor low-pressure side (flowing to air entry from the air vent of compressor) from the high-pressure side of compressor;? On this bypass line 9, first switch device 7 and second throttling device 6 have been disposed in series it, this first switch device is preferably For electromagnetic valve, this second throttling device 6 can be capillary tube as shown in Figure 1 or choke valve, this second throttling dress Put 6 can reduce flow through this second throttling device after the pressure of coolant and described first switch device can balance in its action Pressure differential between described compressor inlet and outlet.
The work process of the cooling cycle system of the present invention is described below.In actual moving process, it is preferred to use set Put temperature in the temperature sensor monitors freezer in the freezer halt condition to judge whether to have reached heat pump.This Part for example preferably when cold storehouse temperature has reached required Ku Wen and need not freeze further, follow by phased out refrigeration The operation of loop systems.Specifically, when the temperature that temperature sensor judges in freezer reaches predetermined bank temperature, by refrigeration unit Control circuit sends stopping signal, now, closes second switch device 5, compressor 1 continues to run with by vaporizer 3 simultaneously Coolant be pumped in the condenser 2 with high refrigerant pressure via compressor 1, because the presence of check valve 8 is it can be ensured that cold Matchmaker is uniaxially delivered in condenser 2, is leaked in vaporizer 3 by compressor 1 without on high-tension side coolant.With The operation of compressor, the refrigerant pressure in vaporizer is gradually lowered, when refrigerant pressure (the i.e. low pressure of heat pump in vaporizer Lateral pressure) it is reduced to scheduled pressure value (can also be for, after continuing a scheduled time, the scheduled time can be for example 10 to 30 seconds) When, reflect the coolant no longer having existed in vaporizer enough to can cause flooded starts in compressor start, now permissible Stop the operation of compressor 1.Finally, close the blower fan of vaporizer 3, whole cooling cycle system quits work.Due to vaporizer In do not existed enough to can cause the coolant of flooded starts in compressor start, so that the kind of refrigeration cycle in the present invention When system is again started up work, it is not in the situation of compressor flooded starts.
When the temperature recovery in freezer for the temperature sensor monitors, illustrate to need freezer is freezed further to drop Temperature in low freezer, now needs to restart the heat pump having been switched off.Specifically, the control circuit of refrigeration unit Send starting-up signal, open first switch device 7, compressor high-pressure side coolant is via the first switch device 7 on bypass line 9 Flow to compressor low-pressure side with second throttling device 6, thus balancing compressor suction and exhaust ports pressure.Specifically, when compressor is arranged It is believed that compressor suction and exhaust ports pressure belongs to poised state during atmospheric pressure-pressure of inspiration(Pi)≤0.05Mpa.Open further Evaporator fan, opens second switch device 5, can be filled via second switch by the coolant in this condenser 2 with elevated pressures Put 5 and first throttle device 4 flow to vaporizer 3.Wherein, after t second after compressor is opened, t for example can take 20 seconds, closes institute State first switch device 7.Due to the effect of check valve 8, the high pressure refrigerant pressure of condenser 2 is not transferred to going out of compressor 1 Mouthful.In the presence of bypass line 9 between compressor inlet and outlet, through between short time, the inlet and outlet of compressor Pressure in a basic balance so that the pressure differential between inlet and outlet controls is allowing the scope that can normally start of compressor In (can also be for, after continuing a scheduled time, the scheduled time can be for example 10 to 30 seconds), and then normally-open compressor, protect Demonstrate,prove high normal starting rate.
In another embodiment, when heat pump is single heating, check valve is disposed in the interior the system of heat exchanger On hot entrance pipe.
In a further embodiment, when heat pump is for refrigerating and heating systems, the refrigeration entrance pipe of outdoor heat exchanger On be provided with the 4th switching device, the 4th switching device be used for when heat pump by refrigerating state enter stopped status when, cut-out In the refrigeration entrance pipe of outdoor heat exchanger, coolant is to the stream in compressor direction;Heating of indoor heat exchanger sets on entrance pipe It is equipped with the 5th switching device, the 5th switching device is used for when heat pump enters stopped status by the state that heats, and cut-out is indoor Heat exchanger heat in entrance pipe coolant to the stream in compressor direction.4th switching device and the 5th switching device can be Article two, the parallel branch that can switch, wherein one branch road is path, another branch road is check valve, the 4th switching device and 5th switching device can also be electromagnetic valve.Its specific work process is similar with single refrigeration system, will not be described here.
According to the heat pump in the present invention, it is provided with bypass line, when heat pump starts, can beat bypass line Open, to balance the pressure reduction between compressor inlet and outlet at short notice, with can be at short notice when meeting compressor start up condition Compressor start is got up, improves the startup success rate of compressor.In control method according to the heat pump in the present invention, It is provided with second switch device, when receiving pass on connecting line between described outdoor heat exchanger and described indoor heat exchanger During machine signal, close described second switch device and after continuing for second scheduled time or described heat pump low-pressure lateral pressure During less than predetermined value, close compressor, as such, it is possible to the coolant in vaporizer is pumped to the condensation with higher refrigerant pressure In device, thus storing a large amount of coolant thus leading to compressor flooded starts in vaporizer when avoiding shutting down;And, due to being provided with Bypass line, is also avoided that simultaneously and cannot be opened due to the high-low pressure difference between compressor inlet and outlet during compressor start Dynamic problem.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art For, the present invention can have various change and change.All any modifications made within spirit and principles of the present invention, equivalent Replace, improve etc., should be included within the scope of the present invention.

Claims (10)

1. a kind of heat pump is it is characterised in that include compressor, outdoor heat exchanger, first throttle device and indoor heat exchange Device, described compressor, outdoor heat exchanger, first throttle device and indoor heat exchanger form coolant circulating system, also include side Siphunculus road, the two ends of described bypass line connect the inlet and outlet of described compressor respectively, and described bypass line is provided with For opening and closing the first switch device of described bypass line.
2. heat pump according to claim 1 is it is characterised in that be additionally provided with described bypass line and described first The second throttling device of switching device series connection.
3. heat pump according to claim 2 is it is characterised in that described second throttling device is capillary tube or throttling Valve.
4. heat pump according to claim 1 it is characterised in that described outdoor heat exchanger and described indoor heat exchanger it Between connecting line on be provided with second switch device.
5. heat pump according to claim 1 is it is characterised in that described heat pump is single refrigeration system;
It is provided with the refrigeration entrance pipe of described outdoor heat exchanger and only allow coolant to outdoor heat exchanger refrigeration Way in stream Dynamic check valve.
6. heat pump according to claim 1 is it is characterised in that described heat pump is refrigerating and heating systems;
4th switching device is provided with the refrigeration entrance pipe of described outdoor heat exchanger, described 4th switching device is used for when heat When pumping system enters stopped status by refrigerating state, in the refrigeration entrance pipe of cut-out outdoor heat exchanger, coolant is to compressor direction Stream;And/or,
Heating of described indoor heat exchanger is provided with the 5th switching device on entrance pipe, described 5th switching device is used for when heat When pumping system enters stopped status by the state that heats, cut-out indoor heat exchanger heat in entrance pipe coolant to compressor direction Stream.
7. a kind of control method of heat pump is it is characterised in that described heat pump is as any one of claim 1 to 6 institute The heat pump stated, when receiving starting-up signal, controls described first switch device to open described bypass line.
8. control method according to claim 7 is it is characterised in that when receiving starting-up signal, control described first Described bypass line is opened and continues first scheduled time or described compressor inlet and outlet pressure balance by switching device Open compressor afterwards.
9. control method according to claim 7 it is characterised in that described outdoor heat exchanger and described indoor heat exchanger it Between connecting line on be provided with second switch device, when receiving stopping signal, close described second switch device and simultaneously hold After continuous second scheduled time or when the low-pressure lateral pressure of described heat pump is less than predetermined value, close compressor.
10. a kind of refrigeration unit is it is characterised in that include the heat pump as described in any one of claim 1 to 6.
CN201610911137.1A 2016-10-19 2016-10-19 Heat pump system, control method and refrigerating unit Pending CN106403373A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610911137.1A CN106403373A (en) 2016-10-19 2016-10-19 Heat pump system, control method and refrigerating unit

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Application Number Priority Date Filing Date Title
CN201610911137.1A CN106403373A (en) 2016-10-19 2016-10-19 Heat pump system, control method and refrigerating unit

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107965937A (en) * 2017-11-17 2018-04-27 珠海格力电器股份有限公司 A kind of refrigeration unit and its evacuation halt control method
CN109631383A (en) * 2018-12-13 2019-04-16 珠海格力电器股份有限公司 A kind of air-conditioning system and its control method

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US20130098088A1 (en) * 2011-04-19 2013-04-25 Liebert Corporation Multi-stage cooling system with tandem compressors and optimized control of sensible cooling and dehumidification
CN104729130A (en) * 2013-12-24 2015-06-24 珠海格力电器股份有限公司 Air conditioning system and control method thereof
CN105928264A (en) * 2016-04-22 2016-09-07 广东美的制冷设备有限公司 Air conditioning system and running method thereof
CN206146042U (en) * 2016-10-19 2017-05-03 珠海格力电器股份有限公司 Heat pump system and refrigerating unit

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Publication number Priority date Publication date Assignee Title
CN201138101Y (en) * 2007-12-18 2008-10-22 珠海格力电器股份有限公司 Heat exchanger
US20130098088A1 (en) * 2011-04-19 2013-04-25 Liebert Corporation Multi-stage cooling system with tandem compressors and optimized control of sensible cooling and dehumidification
CN104729130A (en) * 2013-12-24 2015-06-24 珠海格力电器股份有限公司 Air conditioning system and control method thereof
CN105928264A (en) * 2016-04-22 2016-09-07 广东美的制冷设备有限公司 Air conditioning system and running method thereof
CN206146042U (en) * 2016-10-19 2017-05-03 珠海格力电器股份有限公司 Heat pump system and refrigerating unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107965937A (en) * 2017-11-17 2018-04-27 珠海格力电器股份有限公司 A kind of refrigeration unit and its evacuation halt control method
CN107965937B (en) * 2017-11-17 2019-07-16 珠海格力电器股份有限公司 A kind of refrigeration unit and its evacuate halt control method
CN109631383A (en) * 2018-12-13 2019-04-16 珠海格力电器股份有限公司 A kind of air-conditioning system and its control method
CN109631383B (en) * 2018-12-13 2020-04-21 珠海格力电器股份有限公司 Air conditioning system and control method thereof

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