CN106679235B - Heat pump system control method, heat pump system and air conditioner - Google Patents
Heat pump system control method, heat pump system and air conditioner Download PDFInfo
- Publication number
- CN106679235B CN106679235B CN201611136705.1A CN201611136705A CN106679235B CN 106679235 B CN106679235 B CN 106679235B CN 201611136705 A CN201611136705 A CN 201611136705A CN 106679235 B CN106679235 B CN 106679235B
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- Prior art keywords
- heat
- pump system
- refrigerant
- heat recovery
- recuperation
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000011084 recovery Methods 0.000 claims abstract description 87
- 239000003507 refrigerant Substances 0.000 claims abstract description 65
- 238000004378 air conditioning Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 238000001514 detection method Methods 0.000 description 7
- 238000005057 refrigeration Methods 0.000 description 6
- 238000004064 recycling Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- 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
- F24F5/0007—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 cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a heat pump system control method, a heat pump system and an air conditioner. The control method comprises the following steps: and judging whether the heat recovery mode is allowed to operate or not according to the temperature of the heat recovery medium which is required to perform heat exchange with the refrigerant, and/or controlling the start and stop of a compressor in the refrigerant circulation loop according to the temperature of the heat recovery medium which is required to perform heat exchange with the refrigerant when the heat recovery mode is allowed to operate. The invention provides a heat recovery device control method, which controls whether to allow the heat recovery mode and whether to stop the compressor or not through the temperature of a heat recovery medium. The heat recovery device is forbidden to operate actively, or the compressor is closed actively, so that the influence on the stability of the operation of the heat pump system due to overhigh or overlow temperature of the heat exchange medium is avoided, or the compressor is started and stopped repeatedly. The heat pump system has the advantages that the stability and the comfort of the operation of the heat pump system can be guaranteed, the stability of the heat recovery function can be guaranteed, and domestic hot water is provided for users.
Description
Technical field
The present invention relates to heat recovery technology field, especially a kind of heat pump system control method, heat pump system and air-conditioning.
Background technique
Heat pump system with heat recovery function can recycle heat by heat recovery apparatus, and by the heat pair of recycling
Domestic water heat supply, provides the user with hot water for life, has not only reduced the waste of the energy, but also bring conveniently to user's life.
But when starting heat recovery function in cooling mode, usually since heat recovery water box temperature is spent low or excessively high be easy to cause machine
Group fluctuation of service the case where, make condenser duty variation greatly, system is unstable, there is low-voltage variation or unit start repeatedly show
As.
Summary of the invention
In view of this, the present invention provides a kind of heat pump system control that can voluntarily control recuperation of heat start and stop and operational mode
Method, heat pump system and air-conditioning.
In a first aspect, providing a kind of control method of heat pump system.
The heat pump system includes refrigerant circulation circuit and heat recovery apparatus, and the heat pump system includes refrigerant circulation circuit
And heat recovery apparatus, refrigerant and the heat when the heat pump system runs heat recovery mode, in the refrigerant circulation circuit
The recuperation of heat medium of recyclable device carries out heat exchange, and the control method includes:
Operation recuperation of heat is determined whether according to the temperature to carry out the recuperation of heat medium that heat exchanges with refrigerant
Mode controls institute according to the temperature that carry out the recuperation of heat medium that heat exchanges with refrigerant when running heat recovery mode
The temperature of the start and stop for stating the compressor in refrigerant circulation circuit, the recuperation of heat medium to exchange with refrigerant progress heat is low
In second threshold, the compressor is closed first, the compressor is opened after predetermined hold-time and runs recuperation of heat
Mode.
Preferably, it is greater than or equal to the first threshold to carry out the temperature for the recuperation of heat medium that heat exchanges with refrigerant
Value does not allow the heat pump system operation heat recovery mode, to carry out the recuperation of heat medium temperature that heat exchanges with refrigerant
Degree is lower than first threshold, allows the heat pump system operation heat recovery mode.
Preferably, when the heat pump system run heat recovery mode when, the recuperation of heat medium can with by the refrigerant
The refrigerant that the compressor of circulation loop flows to condenser carries out heat exchange.
Preferably, the first threshold is the delivery temperature of the compressor.
Preferably, after the compressor being closed, the compressor is opened when meeting any in following condition:
Predetermined hold-time；
The temperature difference of delivery temperature and the recuperation of heat medium to exchange with refrigerant progress heat is within a predetermined range.
Preferably, the predetermined time is 5-10 minutes；And/or
The second threshold is 28 DEG C -32 DEG C.
Preferably, it is greater than or equal to second threshold to carry out the temperature for the recuperation of heat medium that heat exchanges with refrigerant
And it is lower than first threshold, when the heat pump system runs heat recovery mode, the refrigerant in the refrigerant circulation circuit is made to flow through institute
State heat recovery apparatus, the compressor continuous service.
Second aspect provides a kind of heat pump system, including refrigerant circulation circuit and heat recovery apparatus, when the heat pump system
When running heat recovery mode, refrigerant flows through the heat recovery apparatus in the refrigerant circulation circuit, and in the heat recovery apparatus
Interior to exchange with recuperation of heat medium progress heat, the heat pump system is run using above-mentioned control method.
Preferably, the heat recovery apparatus includes heat-exchanger rig and driving device, and the heat-exchanger rig includes the first heat exchange
Flow path and the second heat exchange flow path, are able to carry out heat exchange between the first heat exchange flow path and the second heat exchange flow path, and described the
One heat exchange flow path is set in the refrigerant circulation circuit, when the heat pump system runs heat recovery mode, the recuperation of heat
Medium can flow through the second heat exchange flow path under the action of the driving device.
The third aspect provides a kind of air-conditioning, the heat pump system including preceding claim.
Preferably, the air-conditioning is air-cooled screw unit, roof machine or module machine.
Heat recovery apparatus control method provided by the invention, by detecting recuperation of heat medium temperature, then according to recuperation of heat
The temperature of medium come control whether to allow operation heat recovery mode and compressor whether shut down.By actively forbidding recuperation of heat mould
The operation of formula avoids alternatively, actively closing compressor since heat exchange medium temperature is too high or too low to the steady of heat pump system operation
It is qualitative to impact, or compressor is made the case where repeatedly starting and stopping occur.Both can guarantee heat pump system operation stability and
Comfort, and can guarantee the stability of heat recovery function, hot water for life is provided for user.
Detailed description of the invention
By referring to the drawings to the description of the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage will be apparent from, in the accompanying drawings:
Fig. 1 shows heat recovery apparatus system diagram of the present invention；
Fig. 2 shows heat recovery apparatus control method flow charts of the present invention.
Specific embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.Under
Text is detailed to describe some specific detail sections in datail description of the invention.Do not have for a person skilled in the art
The present invention can also be understood completely in the description of these detail sections.In order to avoid obscuring essence of the invention, well known method, mistake
There is no narrations in detail for journey, process, element.
In addition, it should be understood by one skilled in the art that provided herein attached drawing be provided to explanation purpose, and
What attached drawing was not necessarily drawn to scale.
Unless the context clearly requires otherwise, "include", "comprise" otherwise throughout the specification and claims etc. are similar
Word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, be " including but not limited to " contains
Justice.
In the description of the present invention, it is to be understood that, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
It is two or more.
Heat pump system control method provided by the invention, for controlling the heat including refrigerant circulation circuit and heat recovery apparatus
Pumping system.As shown in Figure 1, heat pump system includes compressor 1, heat recovery apparatus 2, condenser 3, electric expansion valve 4 and evaporator
5, in the exemplary embodiment, heat recovery apparatus includes heat-exchanger rig and driving device, and heat-exchanger rig preferably uses shell-tube type
Heat exchanger, the shell of shell and tube exchanger are connected to a recuperation of heat medium channel, and driving device is arranged in recuperation of heat medium channel
On, further, it is additionally provided with on-off switch 8 in recuperation of heat medium channel, the pipe, cold of the compressor 1, shell and tube exchanger
Condenser 3, electric expansion valve 4 and evaporator 5 are in turn connected to form refrigerant circulation circuit.When heat pump system runs heat recovery mode
When, on-off switch 8 is opened, and driving device is opened, and recuperation of heat medium can flow into pipe shell type heat exchange under the action of driving device
In the shell of device, in pipe refrigerant carry out heat exchange, it is heated after recuperation of heat medium flowed under the action of driving device
The shell of shell-and-tube heat exchanger out.The exhaust ports of the compressor 1 are provided with the first temperature-detecting device 6, for detecting
The refrigerant temperature of 1 exhaust ports of compressor.Second temperature detection dress is provided at the housing inlet port of the heat recovery apparatus 2
7 are set, the second temperature detection device 7 is for detecting the recuperation of heat medium temperature (heat at this time for flowing into the heat recovery apparatus 2
Recovering medium not yet occurs heat with refrigerant and exchanges).
Further, the recuperation of heat medium is water, and the shell of the shell-and-tube heat exchanger accesses water-flow circuit, thus
Hot water for life can be provided for user.
When the heat recovery mode for opening heat pump system opens the on-off when that is, described heat recovery apparatus 2 carries out recuperation of heat
Switch 8 and driving device, water start to flow, and flow through the heat recovery apparatus 2, in the heat recovery apparatus 2, refrigerant and water
It exchanges heat.Enter the condenser 3 with the refrigerant to cool down after water heat exchange, flows out the recuperation of heat with the water of refrigerant heat exchange heating
Device 2 is for users to use.
When the heat recovery mode for closing the heat pump system closes the on-off when that is, described heat recovery apparatus 2 does not exchange heat
Switch 8 and driving device, water do not flow, and refrigerant flows through the heat recovery apparatus and do not exchange heat, alternatively, only opening just in heat pump system
The water of a small amount of remaining no longer exchange heat after a small amount of heat exchange increases water temperature in phase and the heat recovery apparatus 2.
As described in Figure 2, heat pump system control method provided by the invention includes the following steps:
Step S1: the refrigeration mode of heat pump system is opened.When user needs to run heat recovery mode, following steps are executed
Suddenly, when user does not need operation heat recovery mode, heat pump system keeps refrigeration mode operation.
Step S2: the recuperation of heat medium of detection heat recovery apparatus entry position (will carry out the heat that heat exchanges with refrigerant
Recovering medium) temperature, judge whether to meet whether heat recovery apparatus unlocking condition and heat pump system allow to run recuperation of heat mould
Formula.Specifically:
Judge whether the recuperation of heat medium temperature of detection is greater than first threshold；
When the recuperation of heat medium temperature of detection is greater than or equal to first threshold, do not allow to run heat recovery mode, i.e., it is cold
Matchmaker does not exchange heat when flowing through heat recovery apparatus；
When the recuperation of heat medium temperature of detection is less than first threshold, allows to run heat recovery mode, execute step S3.
Further, when heat recovery apparatus is arranged between compressor outlet and condenser inlet, i.e. recuperation of heat medium
When exchanging with the refrigerant progress heat for flowing to condenser by compressor, the first threshold is delivery temperature, i.e. compressor air-discharging
Refrigerant temperature at mouthful.
When the recuperation of heat medium temperature of detection is higher than first threshold, does not allow to run heat recovery mode, temperature can be prevented
Higher recuperation of heat medium to be spent to the lower refrigerant heat transfer of temperature, causes condensing pressure excessively high, there is high voltage protective in heat pump system,
The phenomenon that compressor repeatedly starting and stopping, occurs, and ensure that the comfort of heat pump system refrigeration.
Step S3: judge whether the recuperation of heat medium temperature of heat recovery apparatus entry position is greater than second threshold.
When recuperation of heat medium temperature < second threshold, heat recovery apparatus executes the first operational mode, i.e. step S4；
When recuperation of heat medium temperature >=second threshold, heat recovery apparatus executes the second operational mode, i.e. step S5.
Further, the second threshold is 28 DEG C -32 DEG C, preferably 30 DEG C.
Step S4: in the first operational mode, (i.e. on-off switch 8 and driving device open it before operation heat recovery mode
Before) compressor first closes, and compressor is then turned on after running a period of time, open simultaneously on-off switch 8 and driving device operation
Heat recovery mode specifically comprises the following steps:
Step S41: compressor shutdown.
Compressor shutdown, the refrigerant in refrigerant circulation circuit do not recycle.
Step S42: compressor shutdown for a period of time after, delivery temperature reduce, compressor restarting, refrigerant is by compressor
It is introduced into heat recovery apparatus heat exchange after outflow, then, then flows into condenser.Further, the compressor shutdown time is 5-10 points
Clock, preferably 5 minutes；
Alternatively, the recuperation of heat medium that heat exchanges will be carried out with refrigerant with heat recovery apparatus by waiting delivery temperatures to be reduced to
Temperature is identical, alternatively, temperature difference within a predetermined range when, compressor is started to work again.
Further, the preset range is 0-5 degree.
It is larger with the heat exchange amount of refrigerant since recuperation of heat medium temperature is too low, it is easy after so that refrigerant is exchanged heat in condenser
Total heat exchange amount is excessive, and refrigerant temperature decline, the pressure of the lower condenser side of refrigerant temperature will be lower, and it is low heat pump system occur
Pressure protection phenomenon, influences the stability of compressor operation.It in this step, first will compression before heat recovery apparatus is started to work
Organ closes, when the refrigerant temperature in condenser first being allowed to be reduced to that identical as heat exchange medium temperature or the temperature difference is smaller, can prevent by
Too low in recuperation of heat medium temperature, the heat exchange amount of refrigerant is excessive to cause condensing pressure too low, low-voltage variation occurs.It ensure that heat pump
The stability and reliability of system operation.
Step S5: in the second operational mode, heat recovery mode is directly run, i.e., directly opens on-off switch 8 and driving
Device, compressor are not shut down, and the refrigerant of the high temperature and pressure after compressor pressurizes enters heat recovery apparatus, are changed with recuperation of heat medium
Heat.
In this step, when recuperation of heat is started to work, compressor keeps work, can prevent due to recuperation of heat medium temperature
Excessively high condenser heat exchange amount is insufficient, condensing pressure raising, pressure drop low-heat pumping system refrigeration effect occurs.
Step S6 is executed after step S4 or S5.
Step S6: compressor is run simultaneously with driving device, and heat pump system carries out refrigeration and recuperation of heat simultaneously.
The present invention also provides a kind of air-conditioning, the air-conditioning includes above-mentioned heat pump system, and can pass through above-mentioned heat pump system
Control method of uniting control.The air-conditioning can recycle the heat of refrigerant while refrigeration, and the heat of recycling can be used
In heating water, hot water for life is provided for user, alternatively, the heat of recycling can be also used for other aspects.Preferably, the sky
It is adjusted to air-cooled screw unit, roof machine or module machine etc..
Heat recovery apparatus control method provided by the invention and heat pump system, by detecting recuperation of heat medium temperature, then
It controls heat recovery apparatus according to the temperature of recuperation of heat medium whether to run and the operational mode of heat recovery apparatus, that is, compression
Whether machine shuts down.By actively heat recovery apparatus being forbidden to run, alternatively, actively closing compressor, avoid due to heat transferring medium temperature
It spends the too high or too low stability to heat pump system operation to impact, or compressor is made the case where repeatedly starting and stopping occur.Both
It can guarantee the stability and comfort of heat pump system operation, and can guarantee the stability of heat recovery function, be provided for user
Hot water for life.
Those skilled in the art will readily recognize that above-mentioned each preferred embodiment can be free under the premise of not conflicting
Ground combination, superposition.
It should be appreciated that above-mentioned embodiment is merely exemplary, and not restrictive, without departing from of the invention basic
In the case where principle, those skilled in the art can be directed to the various apparent or equivalent modification or replace that above-mentioned details is made
It changes, is all included in scope of the presently claimed invention.
Claims (11)
1. a kind of control method of heat pump system, which is characterized in that the heat pump system includes refrigerant circulation circuit and recuperation of heat
Device, refrigerant and the heat recovery apparatus when the heat pump system runs heat recovery mode, in the refrigerant circulation circuit
Recuperation of heat medium carry out heat exchange, the control method includes:
Operation heat recovery mode is determined whether according to the temperature to carry out the recuperation of heat medium that heat exchanges with refrigerant, is being permitted
When running heat recovery mode perhaps, the refrigerant circulation is controlled according to the temperature that carry out the recuperation of heat medium that heat exchanges with refrigerant
The start and stop of compressor in circuit, to carry out the temperature for the recuperation of heat medium that heat exchanges with refrigerant lower than the second threshold
Value, the compressor is closed, open the compressor after predetermined hold-time and run heat recovery mode first.
2. control method according to claim 1, which is characterized in that returned to carry out the heat that heat exchanges with refrigerant
The temperature for receiving medium is greater than or equal to first threshold, does not allow heat pump system operation heat recovery mode, to refrigerant into
The recuperation of heat medium temperature of row heat exchange is lower than first threshold, allows the heat pump system operation heat recovery mode.
3. control method according to claim 2, which is characterized in that when the heat pump system runs heat recovery mode,
The refrigerant that the recuperation of heat medium can flow to condenser with the compressor by the refrigerant circulation circuit carries out heat and exchanges.
4. control method according to claim 3, which is characterized in that the first threshold is the exhaust temperature of the compressor
Degree.
5. control method according to claim 1, which is characterized in that after closing the compressor, when meeting following item
The compressor is opened when any in part:
Predetermined hold-time；
The temperature difference of delivery temperature and the recuperation of heat medium to exchange with refrigerant progress heat is within a predetermined range.
6. control method according to claim 4 or 5, which is characterized in that the predetermined time is 5-10 minutes；And/or
The second threshold is 28 DEG C -32 DEG C.
7. control method according to claim 1, which is characterized in that returned to carry out the heat that heat exchanges with refrigerant
The temperature for receiving medium is greater than or equal to second threshold and is lower than first threshold, when the heat pump system runs heat recovery mode, institute
State compressor continuous service.
8. a kind of heat pump system, which is characterized in that including refrigerant circulation circuit and heat recovery apparatus, when the heat pump system is run
When heat recovery mode, refrigerant flows through the heat recovery apparatus in the refrigerant circulation circuit, and in the heat recovery apparatus with
Recuperation of heat medium carries out heat exchange, and the heat pump system is transported using control method as described in any one of claim 1 to 7
Row.
9. heat pump system according to claim 8, which is characterized in that the heat recovery apparatus includes heat-exchanger rig and driving
Device, the heat-exchanger rig include the first heat exchange flow path and the second heat exchange flow path, and the first heat exchange flow path is changed with described second
Heat exchange is able to carry out between hot flowpath, the first heat exchange flow path is set in the refrigerant circulation circuit, when the heat pump system
When system operation heat recovery mode, the recuperation of heat medium can flow through the second heat exchange stream under the action of the driving device
Road.
10. a kind of air-conditioning, which is characterized in that including heat pump system described in claim 8 or 9.
11. air-conditioning according to claim 10, which is characterized in that the air-conditioning is air-cooled screw unit, roof machine or mould
Block machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611136705.1A CN106679235B (en) | 2016-12-12 | 2016-12-12 | Heat pump system control method, heat pump system and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611136705.1A CN106679235B (en) | 2016-12-12 | 2016-12-12 | Heat pump system control method, heat pump system and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106679235A CN106679235A (en) | 2017-05-17 |
| CN106679235B true CN106679235B (en) | 2019-01-15 |
Family
ID=58868731
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611136705.1A Active CN106679235B (en) | 2016-12-12 | 2016-12-12 | Heat pump system control method, heat pump system and air conditioner |
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| CN (1) | CN106679235B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4199955A (en) * | 1976-10-27 | 1980-04-29 | Sun-Econ, Inc. | Heat extraction or reclamation apparatus for refrigerating and air conditioning systems |
| CN102818408B (en) * | 2012-09-07 | 2015-04-01 | 青岛奥利凯中央空调有限公司 | Heat recovery control method of air cooling module |
| CN104075510B (en) * | 2013-03-27 | 2016-11-09 | 约克（无锡）空调冷冻设备有限公司 | Part heat recovery air conditioner unit and refrigerant control method thereof |
| CN204165277U (en) * | 2014-10-16 | 2015-02-18 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN104390392B (en) * | 2014-11-21 | 2017-01-18 | 珠海格力电器股份有限公司 | Partial heat recovery control method and system |
-
2016
- 2016-12-12 CN CN201611136705.1A patent/CN106679235B/en active Active
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