CN106369719A - Heat pump system, control method thereof and air conditioner - Google Patents
Heat pump system, control method thereof and air conditioner Download PDFInfo
- 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
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- China
- Prior art keywords
- heat pump
- compressor
- switch device
- suction line
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-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
- F24F5/0046—Air-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
-
- 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
-
- 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
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Analytical Chemistry (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Combustion & Propulsion (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a heat pump system, a control method thereof and an air conditioner. The heat pump system provided by the invention comprises a compressor, wherein an air suction port of the compressor is connected with an air suction pipeline, a first switching device is arranged on the air suction pipeline of the compressor, and the first switching device is used for opening and cutting off a flow path of a refrigerant in the air suction pipeline to the direction of the compressor. The first switch device is arranged on the air suction pipeline of the compressor of the heat pump system, the flow path of the refrigerant in the air suction pipeline towards the direction of the compressor can be opened and cut off through the first switch device, and the flow path of the refrigerant in the air suction pipeline towards the direction of the compressor can be cut off through the first switch device when the heat pump system is stopped and is in a low-temperature placing state, so that the refrigerant backflow at the air suction port of the compressor is effectively avoided, the probability of liquid-carrying compression of the compressor is reduced, and the operation reliability of the heat pump system is improved.
Description
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
℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610881061.2A CN106369719A (en) | 2016-10-08 | 2016-10-08 | Heat pump system, control method thereof and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610881061.2A CN106369719A (en) | 2016-10-08 | 2016-10-08 | Heat pump system, control method thereof and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106369719A true CN106369719A (en) | 2017-02-01 |
Family
ID=57895451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610881061.2A Pending CN106369719A (en) | 2016-10-08 | 2016-10-08 | Heat pump system, control method thereof and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106369719A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539616A (en) * | 2019-01-02 | 2019-03-29 | 格力电器（合肥）有限公司 | Prevent compressor protection architecture and air conditioning system of refrigerant migration |
| 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 |
| CN110595098A (en) * | 2019-10-08 | 2019-12-20 | 珠海格力电器股份有限公司 | Air conditioning system and control method |
| CN110595096A (en) * | 2019-10-08 | 2019-12-20 | 珠海格力电器股份有限公司 | Air conditioning system and control method |
| CN111692653A (en) * | 2020-07-15 | 2020-09-22 | 珠海格力电器股份有限公司 | Compressor, air conditioner and control method of compressor |
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|---|---|---|---|---|
| CN109539616A (en) * | 2019-01-02 | 2019-03-29 | 格力电器（合肥）有限公司 | Prevent compressor protection architecture and air conditioning system of refrigerant migration |
| 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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| CN110595096A (en) * | 2019-10-08 | 2019-12-20 | 珠海格力电器股份有限公司 | Air conditioning system and control method |
| CN111692653A (en) * | 2020-07-15 | 2020-09-22 | 珠海格力电器股份有限公司 | Compressor, air conditioner and control method of compressor |
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Application publication date: 20170201 |