CN106369719A - Heat pump system, control method of heat pump system and air conditioner - Google Patents

Heat pump system, control method of heat pump system and air conditioner Download PDF

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Publication number
CN106369719A
CN106369719A CN201610881061.2A CN201610881061A CN106369719A CN 106369719 A CN106369719 A CN 106369719A CN 201610881061 A CN201610881061 A CN 201610881061A CN 106369719 A CN106369719 A CN 106369719A
Authority
CN
China
Prior art keywords
heat pump
compressor
switch
control
coolant
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
CN201610881061.2A
Other languages
Chinese (zh)
Inventor
王亚楠
赵亮
李彬
李志强
李毛古
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 CN201610881061.2A priority Critical patent/CN106369719A/en
Publication of CN106369719A publication Critical patent/CN106369719A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • 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
    • F25B13/00Compression machines, plant or systems with reversible 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
    • F25B30/00Heat pumps
    • F25B30/02Heat pumps of the compression type
    • 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
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat accumulators
    • 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

Abstract

The invention discloses a heat pump system, a control method of the heat pump system and an air conditioner. The heat pump system comprises a compressor, an air suction opening of the compressor is connected with an air suction pipe, the air suction pipe of the compressor is provided with a first switching device, and the first switching device is used for opening and closing a flow path of refrigerants in the air suction pipe to the compressor. By means of the heat pump system, the first switching device is arranged on the air suction pipe of the compressor, the flow path of the refrigerants in the air suction pipe to the compressor can be opened and closed through the first switching device, when the heat pump system is halted and is in a low-temperature state, the flow path of the refrigerants in the air suction pipe to the compressor can be closed through the first switching device, the refrigerants at the air suction opening of the compressor are effectively prevented from flowing back, the liquid-carrying compression rate of the compressor is reduced, and the running reliability of the heat pump system is improved.

Description

Heat pump and its control method, air-conditioning
Technical field
The present invention relates to preventing coolant from entering the heat pump system in compressor during a kind of technical field of heat pumps, more particularly, to shutdown System, control method and air-conditioning.
Background technology
Air-conditioner be life in a kind of very important household electrical appliances, air-conditioner can allow indoor temperature be saved in allow human body sensory relax In suitable scope, improve the comfort level of people's life, it has also become an indispensable part in our lives.
The heat-exchange system of air-conditioning generally includes outdoor heat exchanger, indoor heat exchanger, compressor, gas-liquid separator, electronics Expansion valve, cross valve etc., when air-conditioning carries out heating operation, the overheated gaseous coolant of the High Temperature High Pressure compressor in off-premises station Exhaust ports are discharged, and get in the indoor heat exchanger in machine, indoor heat exchanger is now equivalent to condenser after cross valve, high The overheated gaseous coolant of warm high pressure is condensed into the supercooled liquid coolant of middle temperature high pressure indoors in heat exchanger, discharges in condensation process Heat institute room is heated, the supercooled liquid coolant of middle temperature high pressure returns in off-premises station by pipeline, through electric expansion valve Throttling, become the coolant gas-liquid mixture of low-temp low-pressure, and enter in outdoor heat exchanger evaporation, when low-temp low-pressure coolant gas-liquid When outdoor heat exchanger is unable to evaporating completely, a part of coolant liquid flows to the gas-liquid separator of compressor low-pressure side to mixture In, the cold media gas isolated in gas-liquid separator enter in compressor and are compressed, thus starting the recuperated cycle of a new round.
In prior art, when air conditioning system is shut down and is in low temperature laying state, restart rear compressor displacement and be also easy to produce band The appearance of hydraulic compression situation, has had a strong impact on the reliability of system, shortens the service life of compressor, results even in compressor Damage.
Content of the invention
It is an object of the invention to provide a kind of heat pump, control method and air-conditioning, shut down in heat pump and be in low temperature During placement, prevent coolant liquid from entering in compressor through air entry, when being again started up compressor, prevent compressor band hydraulic compression The appearance of situation.
To achieve these goals, on the one hand, the invention provides a kind of heat pump;
A kind of heat pump, including compressor, the air entry of described compressor connects suction line, the suction of described compressor First switch device is provided with air pipe, described first switch device is used for the coolant being open and shut off in described suction line Stream to compressor direction.
Preferably, the air vent of described compressor connects gas exhaust piping;
It is provided with exhaust check valve on the gas exhaust piping of described compressor;And/or,
Second switch device is provided with the gas exhaust piping of described compressor, described second switch device is used for beating on an off Close described gas exhaust piping.
Preferably, described heat pump also includes control device and the off-premises station place ring for detecting described heat pump The temperature-detecting device of border temperature, described control device is used for shutting down and the detection of described temperature-detecting device when described heat pump Temperature be less than preset temperature value when, by stream from the coolant in described suction line to compressor direction cut-out, and, control Described second switch device closes described gas exhaust piping.
Preferably, described first switch device is electromagnetic valve;And/or, described second switch device is electromagnetic valve.
Preferably, described heat pump includes cross valve, and described second switch device is arranged at described cross valve and compression On the connecting line of machine air vent.
Preferably, described suction line is provided with gas-liquid separator, described first switch device is arranged at described gas-liquid On the entrance pipe of separator or be arranged on the connecting line between described gas-liquid separator and compressor air suction mouth.
On the other hand, the invention provides a kind of air-conditioning;
A kind of air-conditioning, including heat pump as above.
Another further aspect, the invention provides a kind of control method of heat pump.
A kind of control method of heat pump, described heat pump includes compressor, when heat pump is shut down and heat pump system When the off-premises station place ambient temperature of system is less than preset temperature value, the coolant in the suction line of the described compressor of cut-out is to compression The stream in machine direction.
Preferably, when heat pump is shut down and the off-premises station place ambient temperature of heat pump is less than preset temperature value, Cut off the stream to compressor direction for the coolant in the gas exhaust piping of described compressor.
Preferably, when the off-premises station place ambient temperature of heat pump shutdown, heat pump is less than preset temperature value and holds During the continuous scheduled time, cut off the stream to compressor direction for the coolant in the suction line and gas exhaust piping of described compressor.
Preferably, the described scheduled time is 30 to 60 minutes.
Preferably, described preset temperature value is less than 5 DEG C.
The heat pump that the present invention provides is provided with first switch device in the suction line of compressor, opens by first Close device and can be open and shut off the stream to compressor direction for the coolant in suction line, when heat pump is shut down and is in low By first switch device, coolant in suction line can be cut off to the stream in compressor direction during warm laying state, thus effectively Avoid the refrigerant return at compressor air suction mouth, reduce compressor and the probability with hydraulic compression occurs, improve the operation of heat pump Reliability.
The air-conditioning that the present invention provides adopts above-mentioned heat pump, can lead to when air-conditioning is shut down and is in low temperature laying state Cross first switch device to cut off coolant in suction line to the stream in compressor direction, thus being prevented effectively from compressor air suction mouth The refrigerant return at place, reduces compressor and the probability with hydraulic compression, improve the operational reliability of heat pump.
The control method of heat pump works as heat pump shutdown and the off-premises station place ambient temperature of heat pump is less than in advance If during temperature value, cut off the stream to compressor direction for the coolant in the suction line and gas exhaust piping of compressor, thus effectively Avoid the refrigerant return at compressor air suction mouth, reduce compressor and the probability with hydraulic compression occurs, improve the operation of heat pump Reliability.
Brief description
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to institute in embodiment Need use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only the present invention described in one A little embodiments, for those of ordinary skill in the art, can also obtain other accompanying drawings according to these accompanying drawings.
The principle schematic of the heat pump that Fig. 1 provides for the specific embodiment of the invention.
In figure, 1, compressor;2nd, second switch valve;3rd, cross valve;4th, outdoor heat exchanger;5th, electric expansion valve;6th, indoor Heat exchanger;7th, gas-liquid separator;8th, first switch valve.
Specific embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.
When heat pump is shut down and is in low temperature laying state, restart rear compressor displacement and be also easy to produce band hydraulic compression situation Appearance, had a strong impact on the reliability of system, shortened the service life of compressor, result even in compressor damage.This Shen Please find, the main cause with hydraulic compression in compressor is, when heat pump is shut down and is in low temperature laying state, in pressure The air entry end of contracting machine can produce very serious refrigerant return phenomenon, when being again started up compressor, will be easily caused pressure The appearance with hydraulic compression situation for the contracting machine, and carry hydraulic compression can affect system reliability, shorten the service life of compressor, severe feelings Condition may result in compressor damage.
For the problems referred to above, the invention provides a kind of heat pump and its control method, as shown in figure 1, heat pump Including compressor 1, indoor heat exchanger 6, outdoor heat exchanger 4, cross valve 3, electric expansion valve 5 and gas-liquid separator 7, cold to be formed The closed circuit of matchmaker.Compressor 1 has air entry and air vent, and air entry connects suction line, and air vent connects gas exhaust piping.
When heat pump is shut down and is in low temperature laying state, by the coolant in the suction line of compressor 1 to compression The stream cut-out in machine 1 direction.In specific structure, first switch device is provided with suction line, first switch device is used In stream from the coolant being open and shut off in suction line to compressor 1 direction.Coolant in cut-out suction line is to compressor The stream in direction stops the air entry flowing to compressor 1 for the coolant in suction line.So, when heat pump is shut down and locates When low temperature laying state, by first switch device, coolant in suction line can be cut off to the stream in compressor 1 direction, from And it is prevented effectively from the refrigerant return at compressor 1 air entry, reducing compressor 1 probability with hydraulic compression, improves heat pump system The operational reliability of system.
The concrete structure of first switch device does not limit, and is capable of above-mentioned functions, for example, as shown in fig. 1, first Switching device is first switch valve 8, and suction line is open and shut off by specially electromagnetic valve further by electromagnetic valve.Example again As first switch device includes two branches, and a branch is siphunculus, and another branch is check valve, and this check valve can hinder The only flowing to compressor air suction mouth direction for the coolant, also includes the switching device of a switching between two branches, works as heat pump System is in during normal operating condition and switches to siphunculus to access blood circulation, when heat pump is shut down and is in low temperature laying state When switch to check valve access blood circulation.
The concrete set location of first switch device does not limit, and in one embodiment, first switch device is arranged at gas-liquid On the entrance pipe of separator 7, in another embodiment, as shown in figure 1, first switch device is arranged at gas-liquid separator 7 On connecting line and compressor 1 air entry between.Certainly, optimum set location is gas-liquid separator 7 and compressor 1 air-breathing On connecting line between mouthful at the position of air entry.
Further, when heat pump is shut down and is in low temperature laying state, also can be by the suction line of compressor 1 Stream from coolant to compressor 1 direction cut-out.In the schematic views in particular, aerofluxuss list is arranged on the gas exhaust piping of compressor 1 To valve or second switch device such that it is able to avoid the refrigerant return at exhaust outlet of compressor.Wherein, when setting on gas exhaust piping During exhaust check valve, exhaust check valve can stop coolant to the flowing in compressor 1 air vent direction;When setting on gas exhaust piping During second switch device, heat pump normally runs, and gas exhaust piping is opened by second switch device, and heat pump is shut down and is in During low temperature laying state, gas exhaust piping is closed by second switch device.As shown in figure 1, second switch device can be for example the Two switch valves 2, specially electromagnetic valve further.
The concrete set location of second switch device does not limit, for example, as shown in figure 1, cross valve 3 and compression can be arranged on On the connecting line of machine 1 air vent.Certainly, optimum set location is the connecting tube between cross valve 3 and compressor 1 air vent On road at the position of air vent.
The criterion that heat pump is in low temperature laying state includes, and the off-premises station place ambient temperature of heat pump is low In preset temperature value.Further, heat pump also includes control device and for detecting off-premises station place ambient temperature Temperature-detecting device, control device is used for being less than preset temperature value when the temperature that heat pump is shut down and temperature-detecting device detects When, control first switch device by the coolant in suction line to the stream cut-out in compressor direction, also control second switch dress Put closing gas exhaust piping.In the embodiment shown in fig. 1, that is, first switch valve 8 and second switch valve 2 is controlled to close.Wherein Preset temperature value specifically do not limit, can according to real needs setting it is preferable that preset temperature value be less than 5 DEG C, more preferably 5 DEG C to -10 DEG C, still more preferably for 0 DEG C to -10 DEG C.
Control device is additionally operable to when heat pump is in normal operating condition, controls first switch device by suction line Interior coolant is opened to the stream in compressor direction, and controls second switch device to open gas exhaust piping, as shown in Figure 1 In embodiment, that is, first switch valve 8 and second switch valve 2 is controlled to open.
So, can effectively prevent the liquid refrigerants when the long-time low temperature of heat pump is placed from migrating to compressor 1, work as pressure When contracting machine 1 is again started up, the appearance with hydraulic compression situation can be avoided the occurrence of, play protection compressor 1 and raising system is reliable The effect of property.
The criterion that heat pump is in low temperature laying state also includes, and off-premises station place ambient temperature is less than preset value And predetermined hold-time, increase predetermined hold-time setting can improve judgement accuracy it is ensured that heat pump run Reliability.I.e., in the embodiment shown in fig. 1, when the off-premises station place ambient temperature of heat pump shutdown, heat pump is low In preset temperature value and during predetermined hold-time, control device controls first switch valve 8 and second switch valve 2 to close.Wherein, in advance Fix time and specifically do not limit, can be according to real needs setting it is preferable that the scope of the scheduled time be 30 to 60 minutes.
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 (12)

1. a kind of heat pump, including compressor, the air entry of described compressor connects suction line it is characterised in that described First switch device is provided with the suction line of compressor, described first switch device is used for being open and shut off described suction nozzle Coolant in road is to the stream in compressor direction.
2. heat pump according to claim 1 is it is characterised in that the air vent of described compressor connects gas exhaust piping;
It is provided with exhaust check valve on the gas exhaust piping of described compressor;And/or,
Second switch device is provided with the gas exhaust piping of described compressor, described second switch device is used for opening and closing institute State gas exhaust piping.
3. heat pump according to claim 2 is it is characterised in that described heat pump also includes control device and is used for Detect the temperature-detecting device of the off-premises station place ambient temperature of described heat pump, described control device is used for when described heat pump System-down and described temperature-detecting device detection temperature be less than preset temperature value when, by the coolant in described suction line to The stream cut-out in compressor direction, and, control described second switch device to close described gas exhaust piping.
4. heat pump according to claim 2 is it is characterised in that described first switch device is electromagnetic valve;And/or, Described second switch device is electromagnetic valve.
5. heat pump according to claim 2 is it is characterised in that described heat pump includes cross valve, and described second Switching device is arranged on described cross valve and the connecting line of exhaust outlet of compressor.
6. heat pump according to claim 1 is it is characterised in that be provided with gas-liquid separator in described suction line, Described first switch device is arranged on the entrance pipe of described gas-liquid separator or is arranged at described gas-liquid separator and pressure On connecting line between contracting machine air entry.
7. a kind of air-conditioning is it is characterised in that include the heat pump described in any one of claim 1-6.
8. a kind of control method of heat pump, described heat pump includes compressor and shuts down it is characterised in that working as heat pump And the off-premises station place ambient temperature of heat pump be less than preset temperature value when, cut off described compressor suction line in cold Matchmaker is to the stream in compressor direction.
9. control method according to claim 8 is it is characterised in that work as the off-premises station of heat pump shutdown and heat pump When place ambient temperature is less than preset temperature value, cut off the stream to compressor direction for the coolant in the gas exhaust piping of described compressor Road.
10. control method according to claim 9 is it is characterised in that work as heat pump shutdown, the off-premises station of heat pump When place ambient temperature is less than preset temperature value and predetermined hold-time, cut off suction line and the gas exhaust piping of described compressor In stream from coolant to compressor direction.
11. control methods according to claim 10 are it is characterised in that the described scheduled time is 30 to 60 minutes.
12. control methods described according to Claim 8 to 11 any one are it is characterised in that described preset temperature value is less than 5 ℃.
CN201610881061.2A 2016-10-08 2016-10-08 Heat pump system, control method of heat pump system and air conditioner Pending CN106369719A (en)

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CN201610881061.2A CN106369719A (en) 2016-10-08 2016-10-08 Heat pump system, control method of heat pump system and air conditioner

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Application Number Priority Date Filing Date Title
CN201610881061.2A CN106369719A (en) 2016-10-08 2016-10-08 Heat pump system, control method of heat pump system and air conditioner

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CN106369719A true CN106369719A (en) 2017-02-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109882988A (en) * 2019-03-12 2019-06-14 奥克斯空调股份有限公司 Control method, device and the air conditioner for preventing air-conditioner coolant from migrating

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101568777A (en) * 2006-12-26 2009-10-28 开利公司 Pulse width modulation with discharge to suction bypass
CN202328964U (en) * 2011-12-13 2012-07-11 Tcl空调器(中山)有限公司 Device for protecting heat pump water heater compressor
JP2014055771A (en) * 2013-12-26 2014-03-27 Mitsubishi Electric Corp Air conditioner
CN204730502U (en) * 2015-06-01 2015-10-28 海信(山东)空调有限公司 A kind of cryogenic refrigeration machine room air-conditioner
CN105466095A (en) * 2016-01-25 2016-04-06 珠海格力电器股份有限公司 Electrical heating control method, device and system for low-temperature refrigerating air conditioning unit
CN206094649U (en) * 2016-10-08 2017-04-12 珠海格力电器股份有限公司 Heat pump system and air conditioner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101568777A (en) * 2006-12-26 2009-10-28 开利公司 Pulse width modulation with discharge to suction bypass
CN202328964U (en) * 2011-12-13 2012-07-11 Tcl空调器(中山)有限公司 Device for protecting heat pump water heater compressor
JP2014055771A (en) * 2013-12-26 2014-03-27 Mitsubishi Electric Corp Air conditioner
CN204730502U (en) * 2015-06-01 2015-10-28 海信(山东)空调有限公司 A kind of cryogenic refrigeration machine room air-conditioner
CN105466095A (en) * 2016-01-25 2016-04-06 珠海格力电器股份有限公司 Electrical heating control method, device and system for low-temperature refrigerating air conditioning unit
CN206094649U (en) * 2016-10-08 2017-04-12 珠海格力电器股份有限公司 Heat pump system and air conditioner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
蒋能照主编: "《空调用热泵技术及应用》", 30 September 1997 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109882988A (en) * 2019-03-12 2019-06-14 奥克斯空调股份有限公司 Control method, device and the air conditioner for preventing air-conditioner coolant from migrating

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