CN205909422U - Air conditioner in machine room - Google Patents
Air conditioner in machine room Download PDFInfo
- Publication number
- CN205909422U CN205909422U CN201620449729.1U CN201620449729U CN205909422U CN 205909422 U CN205909422 U CN 205909422U CN 201620449729 U CN201620449729 U CN 201620449729U CN 205909422 U CN205909422 U CN 205909422U
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- Prior art keywords
- condenser
- machine room
- air conditioner
- heat exchanger
- temperature
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Abstract
The utility model discloses an air conditioner in machine room, it includes, refrigerating system and heat pipe system, wherein refrigerating system is including the compressor, condenser, throttling arrangement and the evaporimeter that concatenate and form circulation circuit in proper order, the heat pipe system is including the indoor heat exchanger, switching device and the outdoor heat exchanger that concatenate and form circulation circuit in proper order, indoor heat exchanger is used for carrying out the heat exchange with the indoor environment, outdoor heat exchanger be used for with the condenser carries out the heat exchange. The utility model provides an air conditioner in machine room low temperature starting difficulty's problem is caused to low temperature side migration because of the refrigerant.
Description
Technical field
This utility model is related to refrigeration technology field, particularly to a kind of air conditioner in machine room.
Background technology
Machine room, also known as control data center, is the place providing the user it service.The temperature and humidity of machine room and anti-
Electrostatic measure has strict requirements.Because the equipment in machine room operationally can produce substantial amounts of heat, even in severe cold
Area is also required to install air conditioner in machine room in machine room to maintain relatively low and stable temperature.
Because machine room needs whole year operation, then air conditioner in machine room is required also to want annual operation free of discontinuities.Common practice is to adopt
With the operation on duty by turns of multiple stage air conditioner in machine room, on the one hand ensure that the temperature of machine room, in confidence band, on the other hand can extend machine room
The service life of air-conditioning.
It is in the air conditioner in machine room of holding state in severe cold area, coolant can be to the outdoor that temperature is lower in the presence of pressure reduction
Migration, on startup, compressor cannot normally can start because its internal coolant is less.In order to solve this problem routine
Way is to increase receiver, allows compressor have enough coolant to reach on startup and quickly sets up condensing high pressure, realizes refrigerant circulation,
But so virtually increased the production cost of air conditioner in machine room.
Utility model content
Main purpose of the present utility model be to provide a kind of air conditioner in machine room it is therefore intended that, solve air conditioner in machine room in low temperature
When starting in environment, because coolant to the condenser migration of outdoor low temperature side the startup separator that causes.
For achieving the above object, the utility model proposes air conditioner in machine room, comprising:
Refrigeration system, including the compressor, condenser, throttling arrangement and the vaporizer that are sequentially connected in series and are formed closed circuit;
Hot-pipe system, including the indoor heat exchanger, switching device and the outdoor heat exchanger that are sequentially connected in series and are formed closed circuit;
Described indoor heat exchanger is used for carrying out heat exchange with indoor environment;Described outdoor heat exchanger is used for carrying out heat friendship with described condenser
Change.
Preferably, the described outdoor heat exchanger and described condenser setting in integral type, and described condenser is arranged on described
The top of outdoor heat exchanger.
Preferably, described outdoor heat exchanger and described condenser are in that bushing type is arranged, and described condenser tubes are set in
The outside of described heat exchanger tube.
Preferably, also include heat pipe control system, this heat pipe control system includes controller, is used for measuring outdoor environment temperature
The outdoor temperature sensor of degree, for measuring the indoor temperature transmitter of indoor environment temperature, and is arranged on described condenser
On condenser temperature sensor or pressure transducer;
The condenser temperature value that described heat pipe controller measures according to described condenser temperature sensor or described pressure pass
The condensing temperature value of condenser pressure value conversion of sensor measurement, the outdoor environment temperature of described outdoor temperature sensor measurement
Value, and the indoor environment temperature value of indoor temperature transmitter measurement, control described switching device.
Preferably, described indoor temperature transmitter is arranged on described air conditioner in machine room air inlet, described condenser temperature sensing
Device or pressure transducer are arranged on the middle part of described condenser.
Preferably, described air conditioner in machine room also includes heat pipe control system, and this heat pipe control system includes controller, in institute
State condenser and be provided with condenser pressure detection means, and be provided with evaporator pressure detection dress in the outlet side of described vaporizer
Put;
Condenser pressure value and evaporator pressure inspection that described controller measures according to described condenser pressure detection means
Survey the value of evaporator pressure of measurement device, control described switching device.
Preferably, the heat pipes outer wall connecting described hot-pipe system is enclosed with insulation material, and described outdoor heat exchange
Device and described heat pipes connecting place offer fluid infusion mouth.
Preferably, it is provided with fluid reservoir between described throttling arrangement and condenser, described fluid reservoir goes out near described condenser
The pipeline of mouth is provided with check valve, and described check valve is towards the direction conducting of described vaporizer.
This utility model pass through in air conditioner in machine room arrange hot-pipe system, air conditioner in machine room be in standby in the state of, lead to
Indoor heat exchanger in overheated guard system and outdoor heat exchanger, by the heat transfer in machine room in condenser, realize to condensation
The effect of device heating, and then so that the temperature and pressure of coolant in condenser is raised, reduce the migration amount to condenser for the coolant, realize
In coolant system, the distribution of coolant quantity is close with room temperature, and coolant system quickly can set up condensing high pressure on startup, solves
Air conditioner in machine room causes the difficult problem of cold-starting because coolant migrates to low temperature side.
Brief description
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the pipeline structure schematic diagram of this utility model air conditioner in machine room.
Drawing reference numeral illustrates:
Label | Title | Label | Title |
1 | Coolant system | 22 | Outdoor heat exchanger |
11 | Compressor | 23 | Electromagnetic valve |
12 | Condenser | 24 | Indoor temperature transmitter |
13 | Throttling arrangement | 25 | Outdoor temperature sensor |
14 | Vaporizer | 26 | Condenser temperature sensor |
2 | Hot-pipe system | 30 | Fluid reservoir |
21 | Indoor heat exchanger | 31 | Check valve |
The realization of this utility model purpose, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe it is clear that described embodiment is only a part of embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, broadly falls into the scope of this utility model protection.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in this utility model embodiment
It is only used for explaining the relative position relation between each part, motion conditions etc. under a certain particular pose (as shown in drawings), such as
When really this particular pose changes, then directionality instruction also correspondingly changes therewith.
If in addition, being related to the description of " first ", " second " etc. in this utility model, it is only used for describing purpose, and can not
It is interpreted as indicating or imply its relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can be expressed or implicitly include at least one this feature.In addition, the skill between each embodiment
Art scheme can be combined with each other, but must be capable of by those of ordinary skill in the art based on, when technical scheme
In conjunction with occurring conflicting or will be understood that the combination of this technical scheme does not exist when cannot realize, also not in this utility model
Within the protection domain requiring.
This utility model provides a kind of air conditioner in machine room.As shown in figure 1, this air conditioner in machine room includes refrigeration system and hot-pipe system
2;Shown refrigeration system includes being sequentially connected in series and formed the compressor 11 of refrigerant circulation circuit, condenser 12, throttling arrangement 13 and
Vaporizer 14;Connect, by above five critical pieces, the basic structure forming air conditioning system.The air conditioning system of the present embodiment is also
Including hot-pipe system 2, this hot-pipe system 2 include being sequentially connected in series and formed the indoor heat exchanger 21 of closed circuit, switching device and
Outdoor heat exchanger 22;Described indoor heat exchanger 21 is used for carrying out heat exchange with indoor environment;Described outdoor heat exchanger 22 be used for
Described condenser 12 carries out heat exchange;In this embodiment, switching device is preferably electromagnetic valve 23.
The computer-room air conditioning system of the present embodiment when severe cold area is in holding state, because condenser 12 is located outside,
Therefore its internal temperature and pressure are all low compared with coolant system 1 miscellaneous part being in interior, and in no hot-pipe system 2, coolant exists
In the presence of pressure, migrate in condenser 12.After adding hot-pipe system 2, when described switching device is opened, described heat pipe
The working medium in indoor heat exchanger 21 in system 2, after absorbing machine room heat, forms gaseous working medium, and described gaseous working medium is in pressure
Difference effect is lower to be migrated toward outside, by outside heat exchange of heat pipe to condenser 12 heat release, heats the coolant in condenser 12;
Now, condensation forms liquid refrigerant again, is recycled back to interior through superheater tube and absorbs indoor environment heat again, realizes heat pipe
Internal working medium circulates, and then realizes described condenser 12 internal temperature rising, pressure rise, thus reducing room in coolant system 1
The interior temperature difference with outside, and then reduce coolant to the migration amount of described condenser 12, finally realize coolant quantity in coolant system 1
Distribution and room temperature under close.Until air conditioner in machine room is opened, refrigerant circulation starts, and when condenser 12 temperature rises, closes make and break
Close device, the closed circuit of cut-off hot working fluid.
This utility model passes through to arrange hot-pipe system 2 in air conditioner in machine room, in the state of air conditioner in machine room is standby, by room
Interior heat exchanger 21 and outdoor heat exchanger 22, by the heat transfer in machine room in condenser 12, realize to cold in condenser 12
The effect of matchmaker's heating;And then so that the temperature and pressure in condenser 12 is raised, reduce the migration amount to condenser 12 for the coolant, realize
Close under the distribution of coolant quantity and room temperature in coolant system 1, coolant system 1 quickly can set up condensing high pressure on startup, enters
And ensureing under extreme low temperature, air conditioner in machine room can stably open the safe operation it is ensured that machine room.Solve air conditioner in machine room because cold
Matchmaker migrates to low temperature side and causes the difficult problem of cold-starting;Meanwhile, described hot-pipe system 2 pass through internal exchanger and
Indoor heat is transferred to outdoor by external heat exchanger, therefore undertakes a part of cooling load of other air conditioner in machine room, has energy-conservation to imitate
Really.
Further, in order that indoor heat exchanger 21 obtains more heat, indoor heat exchanger 21 is disposed in the interior machine
At room air-conditioning air inlet position, and the surface area of indoor heat exchanger 21 should be increased as far as possible, help speed up the circulation of hot-pipe system 2
Efficiency;Described outdoor heat exchanger 22 is arranged on described condenser 12, and its distance should be with condenser 12 as close possible to reach
Preferably heat transfer effect.
Based on above-described embodiment, described outdoor heat exchanger 22 and described condenser 12 are in that integral type is arranged, and described condensation
Device 12 is arranged on the top of described outdoor heat exchanger 22.Outdoor heat exchanger 22 can produced by integral type setting with condenser 12
During be just assembled into one;The bottom that outdoor heat exchanger 22 is arranged on condenser 12 is more beneficial for heat exchanger radiant heat upwards
Measure and more absorbed by condenser 12, increased heat exchange efficiency.
Based on above-described embodiment it is contemplated that the pipeline of condenser 12 is longer, it is cold with described that outdoor heat exchanger 22 can be set
Condenser 12 is in that bushing type is arranged, and specifically, can arrange the relative position of outdoor heat exchanger 22 and condenser 12 according to practical situation
Put;On the one hand bushing type setting makes the distance between outdoor heat exchanger 22 and condenser 12 close to so that heat is handed over
Change efficiency more preferably, on the other hand, because the pipeline of condenser is longer, therefore considerably increase outdoor heat exchanger 22 and condenser 12
Heat exchange area.In actual production it is contemplated that during described computer-room air conditioning system normal operation, condenser needs to change with air
Described condenser is therefore set in the outside of described heat exchanger tube by heat.Specifically, aborning, can be using double-deck copper
Pipeline configuration, condenser 12 pipeline is arranged on internal layer copper tube, and outdoor heat exchanger 22 is arranged on outer layer copper tube;This processing
Technique is easier to realize, and has preferable economy.Based on above-described embodiment, in order to meet in air conditioner in machine room after standby,
When condenser 12 temperature and indoor temperature difference meet certain condition, can automatically start hot-pipe system 2, therefore in described machine
Heat pipe control system is also set up, this heat pipe control system includes controller, the room for measuring outdoor environment temperature in room air-conditioning
Outer temperature sensor 25, for measuring the indoor temperature transmitter 24 of indoor environment temperature, and is arranged on described condenser 12
On condenser temperature sensor 26 or pressure transducer.
Described heat pipe controls condenser 12 temperature value that fixture measures according to described condenser temperature sensor 26 or pressure
The condenser temperature value of condenser 12 pressure value conversion of force sensor measuring, the room of described outdoor temperature sensor 25 measurement
Outside environment temperature value, and the indoor environment temperature value of indoor temperature transmitter 24 measurement, control the logical of described switching device
Disconnected.Described temperature sensor species here is not particularly limited, and can realize temperature by modes such as critesistor, thermocouples
Measurement;Further, it is also possible to measure the pressure in condenser 12 by pressure transducer after, obtain cold after via controller conversion
Condenser 12 temperature, meets the variation of measurement form.
Further, described indoor temperature transmitter 24 may be provided at any one place of interior, as long as can reflect in machine room
Mean temperature, therefore described indoor temperature transmitter 24 can be wholely set with described air conditioner in machine room or split setting,
Measured indoor environment temperature is sent to air conditioner in machine room control by arranging external interface in air conditioner in machine room by split setting
In device, and indoor temperature transmitter 24 is arranged on inside air conditioner in machine room, is more convenient to produce and the entirety of air conditioner in machine room is safeguarded.Excellent
Selection of land, described indoor temperature transmitter 24 is arranged at described air conditioner in machine room air inlet position, due at now air conditioner in machine room
In holding state, air conditioner in machine room air inlet position is exposed to interior, can more accurately reflect indoor environment temperature.Likewise,
Described outdoor temperature sensor 25 is disposed in the outdoor, and its set location can have same setting with described indoor temperature measuring device
Put thinking;Described condenser temperature sensor 26 is arranged on described condenser 12, as long as condenser 12 internal temperature can be reflected
?;Preferably, described condenser temperature sensor 26 is arranged on the middle part of condenser 12, so can more accurately obtain
Mean temperature within condenser 12.
Condenser 12 temperature being measured according to described condenser temperature sensor 26 based on above-described embodiment, described controller
Value, the outdoor environment temperature value of outdoor temperature sensor 25 measurement, the indoor environment temperature value of indoor temperature transmitter 24 measurement,
Control the break-make of described switching device.Wherein control method has multiple, can be to bring preset function into be controlled it is also possible to adopt
With fuzzy control, here is not particularly limited.A kind of relatively simple relative method that the present embodiment provides, works as t1 > t3, and t1-
t4>a;Described controller controls described switching device to open, and hot-pipe system 2 turns on;As t1 < t3, described controller controls described
Switching device disconnects, and hot-pipe system 2 turns on;Wherein, t1 is the indoor environment temperature value of indoor temperature transmitter 24 measurement, and t4 is
The outdoor environment temperature value of outdoor temperature sensor 25 measurement, t3 is that condenser temperature sensor 26 measures condenser 12 temperature value
Or the pressure value of pressure transducer measurement is converted into condenser 12 temperature value through described controller;The value that a sets for controller.Its
In, when being also in operation or be just out of service in order to avoid described air conditioner in machine room, air conditioner in machine room inner condenser 12 temperature is also
Higher, but trigger hot-pipe system 2 because indoor/outdoor temperature-difference is larger and start, so whether detection indoor environment temperature more than cold first
Condenser 12 temperature, after determining that condenser 12 temperature is less than Indoor Temperature angle value, is judging whether indoor/outdoor temperature-difference exceedes the threshold of setting
Value, to control hot-pipe system 2 break-make, so can more be accurately controlled hot-pipe system 2 open-minded in due course;But machine room
Starting of air conditioner, compressor 11 works, and when condenser 12 started temperature rises, determines whether whether condenser 12 temperature is more than room
Interior ambient temperature value, if greater than indoor environment temperature value, then closes hot-pipe system 2.
Based on above-described embodiment, because coolant is because of the temperature difference, migrate to outside under pressure, therefore described controller
Compress control method may also be employed when switching device device;Described air conditioner in machine room also includes heat pipe control system, this heat
Pipe control system includes controller, the condenser pressure detection means arranging on described condenser 12, coolant system 1 indoors
Pipeline on arrange vaporizer 14 pressure-detecting device;Described condenser pressure detection means can be arranged on condenser 12,
May also be arranged on the pipeline near condenser 12;Room pressure detection means can be disposed in the interior the pipeline of coolant system 1
On, in order to more directly embody the mobile trend of coolant;Preferably, it is arranged on the outlet side of described vaporizer 14, so, permissible
More accurately judge the pressure differential between interior conduit and condenser 12.Described controller detects dress according to described condenser pressure
Put condenser 12 pressure value of measurement and the value of evaporator pressure of evaporator pressure detection means measurement, control described switching device
Break-make, wherein control method has multiple, and here is not particularly limited, specifically, in the present embodiment, can be using simple
Relative method, when meeting p1-p2 > c when, described controller controls described switching device to open;Hot-pipe system 2 turns on;When meeting p1-
< during d, described controller controls described switching device to cut out disconnection to p2;Hot-pipe system 2 is closed;Wherein, described p1 is described evaporation
Device pressure value, p2 is described condenser pressure value;C, d are the threshold value of the setting of controller.The value of c, d can be according to actually used
When be adjusted at any time, make calling with more motility of hot-pipe system 2.
Based on above-described embodiment, shown hot-pipe system 2 passes through pipeline by described indoor heat exchanger 21, switching device and outdoor
Heat exchanger 22 couples together, and because described hot-pipe system 2 plays the effect of energy transmission, therefore should reduce hot-pipe system 2 as far as possible
Heat on pipeline scatters and disappears;Specifically, in the present embodiment, it is surrounded by with insulation by the pipeline outer wall in hot-pipe system 2
The effect to reach insulation for the material of effect, insulation material can be rock wool pipe, glass cotton, polyurethaness heat-preservation cotton etc., here
Concrete restriction is not done to insulation material.
Further, in hot-pipe system 2, the effect of heat transfer is played it is contemplated that air conditioner in machine room warp as medium using working medium
After using for many years, the working medium within hot-pipe system 2 may even lose efficacy, therefore on described hot-pipe system 2 in effect decay
Setting fluid infusion mouth is so that attendant can easily change internal working medium.It is considered that should not excessive opening on utilidor
Mouthful, and maintain easily human users it is preferable that described fluid infusion mouth room is arranged on described outdoor heat converter and described heating pipe
The connecting place in road.
Based on above-described embodiment, as shown in figure 1, situation about cannot work for preventing hot-pipe system 2 fault, now coolant
Therefore can be located on the pipeline before condenser 12 in described coolant system 1 and be provided with fluid reservoir 30 in a large number to outdoor migration
(direction before condenser 12 is defined as condenser 12 towards the direction of vaporizer 14), when coolant is under pressure to outdoor
During the migration of side, it will flow into fluid reservoir 30 and store, without entering in condenser 12;Preferably, by described fluid reservoir
30 are arranged between described throttling arrangement 13 and condenser 12.Further, in described fluid reservoir 30 near described condenser 12
The pipeline of outlet is provided with unidirectional on-off system, and described check valve 31 is towards the direction conducting of vaporizer 14.So, described unidirectional
On-off system turns on along normal refrigerant circulation direction, closes so that coolant cannot follow along coolant along reverse refrigerant circulation direction
While loop wire reversely flows into condenser 12, when not affecting air conditioner in machine room and normally running, the normal circulation of coolant.
The foregoing is only preferred embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model,
Every equivalent structure change under inventive concept of the present utility model, made using this utility model description and accompanying drawing content
Change, or directly/be indirectly used in other related technical fields and be included in scope of patent protection of the present utility model.
Claims (8)
1. a kind of air conditioner in machine room is it is characterised in that include:
Refrigeration system, including the compressor, condenser, throttling arrangement and the vaporizer that are sequentially connected in series and are formed closed circuit;
Hot-pipe system, including the indoor heat exchanger, switching device and the outdoor heat exchanger that are sequentially connected in series and are formed closed circuit;Described
Indoor heat exchanger is used for carrying out heat exchange with indoor environment;Described outdoor heat exchanger is used for carrying out heat exchange with described condenser.
2. air conditioner in machine room as claimed in claim 1 is it is characterised in that described outdoor heat exchanger and described condenser are in integral type
Setting, and described condenser is arranged on the top of described outdoor heat exchanger.
3. air conditioner in machine room as claimed in claim 1 is it is characterised in that described outdoor heat exchanger and described condenser are in bushing type
Setting, and described condenser tubes are set in the outside of described heat exchanger tube.
4. air conditioner in machine room as claimed in claim 1 is it is characterised in that also include heat pipe control system, this heat pipe control system
Including controller, the outdoor temperature sensor for measuring outdoor environment temperature, for measuring the Indoor Temperature of indoor environment temperature
Degree sensor, and it is arranged on the condenser temperature sensor on described condenser or pressure transducer;
Condenser temperature value or described pressure transducer that described heat pipe controller measures according to described condenser temperature sensor
The condensing temperature value of condenser pressure value conversion of measurement, the outdoor environment temperature value of described outdoor temperature sensor measurement, with
And the indoor environment temperature value of indoor temperature transmitter measurement, control described switching device.
5. air conditioner in machine room as claimed in claim 4 is it is characterised in that described indoor temperature transmitter is arranged on described machine room sky
Transfer in air port, described condenser temperature sensor or pressure transducer are arranged on the middle part of described condenser.
6. air conditioner in machine room as claimed in claim 1 is it is characterised in that also include heat pipe control system, this heat pipe control system
Including controller, condenser pressure detection means is provided with described condenser, and is provided with the outlet side of described vaporizer
Evaporator pressure detection means;
Condenser pressure value and evaporator pressure detection dress that described controller measures according to described condenser pressure detection means
Put the value of evaporator pressure of measurement, control described switching device.
7. air conditioner in machine room as claimed in claim 1 is it is characterised in that connect the heat pipes outer wall parcel of described hot-pipe system
There is insulation material, and described outdoor heat converter offers fluid infusion mouth with described heat pipes connecting place.
8. air conditioner in machine room as claimed in any of claims 1 to 7 in one of claims is it is characterised in that described throttling arrangement and condenser
Between be provided with fluid reservoir, described fluid reservoir is provided with check valve near the pipeline of described condensator outlet, described check valve direction
The direction conducting of described vaporizer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201620449729.1U CN205909422U (en) | 2016-05-16 | 2016-05-16 | Air conditioner in machine room |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201620449729.1U CN205909422U (en) | 2016-05-16 | 2016-05-16 | Air conditioner in machine room |
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Publication Number | Publication Date |
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CN205909422U true CN205909422U (en) | 2017-01-25 |
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CN201620449729.1U Expired - Fee Related CN205909422U (en) | 2016-05-16 | 2016-05-16 | Air conditioner in machine room |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109751723A (en) * | 2018-12-20 | 2019-05-14 | 珠海格力电器股份有限公司 | Heat pump system and control method thereof |
CN111854235A (en) * | 2020-07-20 | 2020-10-30 | 广东美的暖通设备有限公司 | Heat exchange system, air conditioner, control method of heat exchange system and storage medium |
-
2016
- 2016-05-16 CN CN201620449729.1U patent/CN205909422U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109751723A (en) * | 2018-12-20 | 2019-05-14 | 珠海格力电器股份有限公司 | Heat pump system and control method thereof |
CN111854235A (en) * | 2020-07-20 | 2020-10-30 | 广东美的暖通设备有限公司 | Heat exchange system, air conditioner, control method of heat exchange system and storage medium |
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