CN107152820A - A kind of air conditioner and its control method - Google Patents
A kind of air conditioner and its control method Download PDFInfo
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- CN107152820A CN107152820A CN201710463967.7A CN201710463967A CN107152820A CN 107152820 A CN107152820 A CN 107152820A CN 201710463967 A CN201710463967 A CN 201710463967A CN 107152820 A CN107152820 A CN 107152820A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000003507 refrigerant Substances 0.000 claims abstract description 143
- 238000010257 thawing Methods 0.000 claims abstract description 112
- 238000013461 design Methods 0.000 claims description 18
- 239000007788 liquid Substances 0.000 abstract description 38
- 238000004378 air conditioning Methods 0.000 abstract description 14
- 238000009834 vaporization Methods 0.000 abstract description 9
- 230000008016 vaporization Effects 0.000 abstract description 9
- 239000002826 coolant Substances 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000008676 import Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 230000009467 reduction Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 102000003712 Complement factor B Human genes 0.000 description 1
- 108090000056 Complement factor B Proteins 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0401—Refrigeration circuit bypassing means for the compressor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air conditioner and its control method, belong to air-conditioner defrosting technical field.Air conditioner includes the first pipeline and the second pipeline, and the first end of the first pipeline connects the exhaust outlet of compressor, and the second end of the first pipeline connects the first port being connected with indoor heat exchanger of outdoor heat exchanger；The first end of second pipeline connects the exhaust outlet of compressor, the second end connection compressor return air mouthful of the second pipeline.Air conditioner of the present invention has additional the first pipeline and the second pipeline in air-conditioning duct, wherein, the first pipeline can be used for the high temperature refrigerant for discharging compressor to import in outdoor heat exchanger, so that the frost condensed on outdoor heat exchanger is melted, reach the purpose of defrosting ice-melt；Second pipeline is directed into the gas returning port of compressor available for the high temperature refrigerant for discharging compressor, so as to which the liquid refrigerants that compressor is returned in convection current carries out heat temperature raising vaporization, the coolant quantity of liquid is condensed into when flowing through outdoor heat exchanger to reduce, it is ensured that compressor and the overall safe and effective operation of air-conditioning.
Description
Technical field
The present invention relates to air-conditioner defrosting technical field, more particularly to a kind of air conditioner and its control method.
Background technology
When air-conditioning products are run under the conditions of severe cold weather in the winter time, outdoor steam or ice and snow etc. can be in outdoor heat exchangers
Surface condense, and then outdoor heat exchanger outer surface formed frost layer, frost layer can make outdoor heat exchanger and external environment
It is isolated, reduces the refrigerant in outdoor heat exchanger and the heat exchange amount of external environment, have impact on the heating performance of air conditioner.
Therefore, part air-conditioning products are provided with the function of being defrosted to outdoor heat exchanger, and existing air-conditioning property right is carried out
The major way of outdoor unit defrosting has two kinds：A kind of is air-conditioning corresponding refrigerant flow direction operation in a chiller mode, so, air-conditioning
Compressor discharge high temperature refrigerant can preferential outdoor heat exchanger, so as to using high temperature refrigerant heat thawing outdoor heat exchanger
The frost on surface；Another is that air-conditioning still flows to operation with the refrigerant corresponding to heating mode, and in a heating mode, high temperature is cold
Matchmaker can preferentially flow through indoor heat exchanger, but by the way that the aperture of throttling arrangement is tuned up, can flow through the portion of indoor heat exchanger
Divide the high temperature or middle temperature refrigerant of incomplete heat release to flow into outdoor heat exchanger, can equally reach and outdoor heat exchanger is defrosted
The purpose of ice-melt.
But, for second of Defrost mode, because throttling arrangement aperture is tuned up, the refrigerant flow rate in air-conditioning system adds
It hurry up, this part refrigerant for resulting in the gas returning port for flowing back into compressor from outdoor heat exchanger is still liquid condition, liquid refrigerant stream
Enter to occur after compressor liquid hammer problem, the normal of influence compressor is used.
The content of the invention
The embodiments of the invention provide a kind of air conditioner and its control method, it is intended to solves part during air conditioner Defrost operation
The problem of refrigerant is back to compressor with liquid condition.There is a basic reason for some aspects of the embodiment to disclosure
Solution, shown below is simple summary.The summarized section is not extensive overview, nor to determine key/critical component
Or describe the protection domain of these embodiments.Its sole purpose is that some concepts are presented with simple form, in this, as below
Detailed description preamble.
According to the first aspect of the invention there is provided a kind of air conditioner, air conditioner includes indoor heat exchanger, outdoor heat exchange
Device, throttling arrangement and compressor, indoor heat exchanger, outdoor heat exchanger, throttling arrangement and compressor connect structure by refrigerant pipeline
Into refrigerant circulation circuit, air conditioner also includes the first pipeline and the second pipeline, wherein, the first end connection compressor of the first pipeline
Exhaust outlet, the second end of the first pipeline connects the first port being connected with indoor heat exchanger of outdoor heat exchanger；Second pipeline
First end connect the exhaust outlet of compressor, the second end connection compressor return air mouthful of the second pipeline.
Further, the first pipeline is associated with second and is connected in parallel；The first end of first pipeline is connected on the second pipeline；
Or, the first end of the second pipeline is connected on the first pipeline.
Further, the first pipeline is provided with the first control valve for being used for controlling the conducting of the first pipeline or block；Second pipe
Road is provided with the second control valve for being used for controlling the conducting of the second pipeline or block.
According to the second aspect of the invention, a kind of control method of above-mentioned air conditioner, control method bag are additionally provided
Include：When outdoor heat exchanger needs defrosting, air conditioner is run with defrosting mode；The first control valve on the first pipeline is opened in control
With the second control valve on the second pipeline.
Further, control method also includes：Obtain the suction temperature of compressor when air conditioner is run with defrosting mode；
According to suction temperature, the second defrosting flow aperture of the second control valve is determined；By the flow aperture regulation of the second control valve to
Two defrosting flow apertures.
Further, the flow aperture of the second control valve is calculated according to equation below and obtained：K2=A+B*Ts+C*Ts2+D*
Ts3, wherein, K2 is the second defrosting flow aperture, and Ts is the suction temperature of compressor, and A is the first constant, and B calculates system for first
Number, C is the second design factor, and D is the 3rd design factor.
Further, control method also includes：When air conditioner is run with defrosting mode, if the suction temperature of compressor
Less than setting suction temperature threshold value when, control the first control valve is gradually stepped up with the very first time interval set flow open
Degree；If the suction temperature of compressor is more than or equal to the suction temperature threshold value of setting, between the second time for controlling to set
Every gradually reducing the flow aperture of the first control valve.
Further, control method also includes：Obtain the feed liquor temperature of outdoor heat exchanger；Determine the outdoor dew of outdoor environment
Point temperature；If feed liquor temperature is less than outdoor dew-point temperature, the 3rd of the throttling arrangement of air conditioner is determined according to suction temperature
Defrost flow aperture；Using the 3rd defrosting flow aperture as air conditioner run with defrosting mode when the flow of throttling arrangement open
Degree.
Further, the outdoor dew-point temperature of outdoor environment is determined, including：Obtain the outdoor environment temperature of outdoor environment；
The outdoor dew-point temperature of outdoor environment is determined according to outdoor environment temperature；Outdoor dew-point temperature is calculated according to equation below and obtained：
Tes=A*Tao2+ B*Tao-C, wherein, Tes is outdoor dew-point temperature, and Tao is outdoor environment temperature, and A is the first dew-point temperature
Coefficient, B is the second dew-point temperature coefficient, and C is the second constant.
Further, the 3rd defrosting flow aperture of the throttling arrangement of air conditioner is determined according to suction temperature, including：If
Tes >=Te >=Tes-D, then the 3rd defrosting flow aperture is calculated according to equation below obtains：K3=E*Tc+F, wherein, Te be into
Liquid temperature degree, Tc is suction temperature, and D is temperature deviation threshold value, and K3 is the 3rd defrosting flow aperture, and E is aperture design factor, and F is
3rd constant；If Te ＜ Tes-D, the 3rd defrosting flow aperture is the maximum opening of throttling arrangement.
Air conditioner of the present invention has additional the first pipeline and the second pipeline in air-conditioning duct, wherein, the first pipeline can be used for
The high temperature refrigerant that compressor is discharged is imported in outdoor heat exchanger, so that the frost condensed on outdoor heat exchanger is melted, is reached
The purpose of defrosting ice-melt；Second pipeline is directed into the gas returning port of compressor available for the high temperature refrigerant for discharging compressor, so that
The liquid refrigerants that compressor is returned in convection current carries out heat temperature raising vaporization, and the refrigerant of liquid is condensed into when flowing through outdoor heat exchanger to reduce
Amount, it is ensured that compressor and the overall safe and effective operation of air-conditioning.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
Can the limitation present invention.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining principle of the invention together with specification.
Fig. 1 is the structural representation of the air conditioner of the present invention according to shown by an exemplary embodiment；
Fig. 2 is a flow chart of the control method of the present invention according to shown by an exemplary embodiment；
Fig. 3 is another flow chart of the control method of the present invention according to shown by an exemplary embodiment.Wherein, 1, room
Interior heat exchanger；2nd, outdoor heat exchanger；21st, first port；3rd, throttling arrangement；4th, compressor；41st, exhaust outlet；42nd, gas returning port；51、
First pipeline；52nd, the second pipeline；61st, the first control valve；62nd, the second control valve.
Embodiment
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Put into practice them.Other embodiments can include structure, logic, electric, process and other changes.Embodiment
Only represent possible change.Unless explicitly requested, otherwise single components and functionality is optional, and the order operated can be with
Change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair
The scope of bright embodiment includes the gamut of claims, and claims is all obtainable equivalent
Thing.Herein, each embodiment individually or can be represented generally with term " invention ", and it is convenient that this is used for the purpose of,
And if in fact disclosing the invention more than one, the scope for being not meant to automatically limit the application is any single invention
Or inventive concept.Herein, such as first and second or the like relational terms be used only for by an entity or operation with
Another entity or operation make a distinction, without requiring or implying between these entities or operation there is any actual relation
Or order.Moreover, term " comprising ", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that
So that process, method or equipment including a series of key elements not only include those key elements, but also including being not expressly set out
Other key elements, or also include for this process, method or the intrinsic key element of equipment.In the feelings of not more limitations
Under condition, the key element limited by sentence "including a ...", it is not excluded that in the process including the key element, method or equipment
In also there is other identical element.Each embodiment herein is described by the way of progressive, and each embodiment is stressed
Be all between difference with other embodiment, each embodiment identical similar portion mutually referring to.For implementing
For example disclosed method, product etc., because it is corresponding with method part disclosed in embodiment, so the comparison of description is simple
Single, related part is referring to method part illustration.
Fig. 1 is the structural representation of the air conditioner of the present invention according to shown by an exemplary embodiment.
The invention provides a kind of air conditioner, air conditioner includes indoor heat exchanger 1, outdoor heat exchanger 2, the and of throttling arrangement 3
Compressor 4, indoor heat exchanger 1, outdoor heat exchanger 2, throttling arrangement 3 and compressor 4 connect and compose refrigerant by refrigerant pipeline and followed
Loop back path, refrigerant is flowed by the flow direction set by refrigerant circulation circuit along different operational modes, realizes that it heats, freezes and removed
The functions such as frost.
In embodiment, the operational mode of air conditioner includes refrigeration mode, heating mode and defrosting mode, wherein, refrigeration
Set refrigerant flow direction is that the high temperature refrigerant that compressor 4 is discharged first flows through outdoor heat exchanger 2 and outdoor environment during mode operation
Heat exchange, is exchanged heat, last refrigerant return to compressor 4 re-starts pressure in inflow indoor heat exchanger 1 with indoor environment afterwards
Contracting operation；During this, the refrigerant for flowing through outdoor heat exchanger 2 releases heat to outdoor environment, flows through the cold of indoor heat exchanger 1
Matchmaker absorbs heat from indoor environment, by refrigerant circulating in refrigerant circulation circuit, and what can be continued will be indoor
Heat is discharged in outdoor environment, so as to reach the refrigeration purpose of reduction indoor environment temperature.And in heating mode operation
When the set refrigerant flow direction high temperature refrigerant that refers to the discharge of compressor 4 first flow through indoor heat exchanger 1 and exchanged heat with outdoor environment, afterwards
Exchanged heat flowing into outdoor heat exchanger 2 with indoor environment, last refrigerant return to compressor 4 re-starts squeeze operation；This
During one, flow through the refrigerant of indoor heat exchanger 1 and release heat to indoor environment, flow through the refrigerant of outdoor heat exchanger 2 from outdoor
Heat is absorbed in environment, by refrigerant circulating in refrigerant circulation circuit, what can be continued discharges outdoor heat
Into indoor environment, so as to reach that improving indoor environment temperature heats purpose.
Air conditioner in the winter time severe cold weather or microthermal climate operation heating mode in the case of, the steam in outdoor environment
The surface of the outdoor heat exchanger 2 of outdoor unit can be attached to, and then condenses into frost or ice sheet, so, can be in outdoor heat exchanger 2
Outer surface forms certain thickness frost layer, and this can be such that outdoor heat exchanger 2 is isolated with ambient outdoor air, reduce outdoor and change
The heat exchange amount of refrigerant and outdoor environment in hot device 2, and then have influence on exothermal efficiency of the indoor set to indoor environment.Therefore, it is empty
Adjust device in the case of the outer surface of outdoor heat exchanger 2 condensation frost layer, outdoor heat exchanger 2 can be entered by running defrosting mode
Row warming temperature, the thawing so that the frost layer of the outer surface of outdoor heat exchanger 2 can be heated, to reach the defrosting mesh for eliminating frost layer
's.
In embodiment, refrigerant flow direction and the sky of the defrosting mode that air conditioner of the present invention is run when being defrosted to room heat exchanger
Adjust device identical with flowing to of running of heating mode, therefore, in operation of air conditioner defrosting mode, the exhaust outlet 41 of compressor 4 is arranged
The high temperature refrigerant gone out according to the flow direction corresponding to heating mode, indoor heat exchanger 1, throttling arrangement 3 and outdoor are flowed through successively and is changed
Hot device 2, flows back into the gas returning port 42 of compressor 4 again afterwards.So, the mode such as flow aperture by improving throttling arrangement 3, can
So that part high temperature refrigerant not sufficiently exothermic in indoor heat exchanger 1 is flowed into outdoor heat exchanger 2, and in outdoor heat exchanger 2
Heat is released from inside to outside, so as to melt the ice of the outer surface of outdoor heat exchanger 2 using the external liberated heat of this part refrigerant
Frost layer.
In order to improve the defrost efficiency to outdoor heat exchanger 2, air conditioner of the present invention also has additional in refrigerant circulation circuit
First pipeline 51, the first end of the first pipeline 51 connects the exhaust outlet 41 of compressor 4, and the second end connection of the first pipeline 51 is outdoor
The first port 21 being connected with indoor heat exchanger 1 of heat exchanger 2.
It should be appreciated that air conditioner of the present invention is when running defrosting mode, the refrigerant flow direction in refrigerant circulation circuit is
Refrigerant flows to outdoor heat exchanger 2 from indoor heat exchanger 1, therefore, the first end being connected with indoor heat exchanger 1 of outdoor heat exchanger 2
The liquid feeding end of outdoor heat exchanger 2 when mouth 21 is air conditioner operation defrosting mode.
So, in the case where turning on the first pipeline 51, a portion high temperature that the exhaust outlet 41 of compressor 4 is discharged is cold
Matchmaker continues the indoor heat exchanger 1 of the refrigerant flow direction inflow indoor set limited along former refrigerant circulation circuit, and another part high temperature is cold
Matchmaker is then flowed directly into outdoor heat exchanger 2 along the first pipeline 51, therefore, is used when can not only improve air conditioner operation defrosting mode
The cold medium flux defrosted in outdoor heat exchanger 2, meanwhile, middle height being flowed out compared to indoor heat exchanger 1, by once exchanging heat
Warm refrigerant, the temperature for the high temperature refrigerant for flowing directly into outdoor heat exchanger 2 via the first pipeline 51 is higher, and the heat of carrying is also more
It is many, therefore, it can accelerate the defrost speed of outdoor heat exchanger 2, shorten outdoor heat exchanger 2 outer surface frost melting layer when
Between.
In addition, the refrigerant of indoor heat exchanger 1 is flowed through after heat is released to indoor environment according to original refrigerant,
Reduced due to self heat, temperature reduction, therefore, the gaseous refrigerant in part can liquefy as liquid refrigerants, in the stream of throttling arrangement 3
Measure under the defrosting mode that aperture changes, this operative liquid refrigerant can flow into outdoor heat exchanger 2 along refrigerant circulation circuit, and continue edge
Refrigerant circulation circuit flows back to compressor 4, so, the appearance for the problems such as causing 4 liquid hammer of compressor, therefore, is flowed back to reduce
In the liquid refrigerants amount of compressor 4, the generation for avoiding liquid hammer problem, the second end communication chamber of the first pipeline 51 that the present invention is set up
The first port 21 of heat exchanger 1, so, the operative liquid refrigerant of outdoor heat exchanger 2 is flowed into by indoor heat exchanger 1, can with by
First pipeline 51 flows into the high temperature refrigerant mixing of indoor heat exchanger 1, so as to utilize the heat of high temperature refrigerant to liquid refrigerants
Heat temperature raising, it is in gaseous coolant to make liquid refrigerants heating vaporization, and then reaches that reduction is back to the liquid refrigerants amount of compressor 4
Purpose.
In one of the present invention is implemented, mixed refrigerant is when flowing through outdoor heat exchanger 2, and refrigerant outwards releases heat
Amount, so as to carry out defrost processing to the frost of the outer surface of outdoor heat exchanger 2 layer.The refrigerant self heat after heat is released to subtract
Less, temperature is reduced, and part refrigerant therein can also be liquefied as liquid refrigerants, and continues to be back to compressor along refrigerant circulation circuit
4.Therefore, it is the further liquid refrigerants amount for reducing and flowing back to compressor 4, it is of the invention that second is also had additional in refrigerant circulation circuit
Pipeline 52, the first end of the second pipeline 52 connects the exhaust outlet 41 of compressor 4, the second end connection compressor 4 of the second pipeline 52
Gas returning port 42.
So, in the case where the first pipeline 51 and the second pipeline 52 are both turned on, what the exhaust outlet 41 of compressor 4 was discharged
High temperature refrigerant, except including flowing to a part for outdoor heat exchanger 2 along the first pipeline 51 in previous embodiment and being returned along refrigerant circulation
Outside the part for flowing to indoor heat exchanger 1 on road, in addition to flow to along the second pipeline 52 compressor 4 gas returning port 42 it is another
Part refrigerant, this part of high temperature refrigerant is flowed at the gas returning port 42 of compressor 4 via the second pipeline 52, it is possible to from room
Outer machine is back to the low temperature refrigerant mixing at the gas returning port 42 of compressor 4, so that using the heat of high temperature refrigerant to these low temperature colds
Matchmaker's heat temperature raising, makes the vaporization that heats up of the liquid refrigerants that wherein mixes be in a liquid state refrigerant, and then reach that reduction is back to compressor 4 times
The purpose of the liquid refrigerants amount of gas port 42.
In order to simplify the pipeline jointing construction of air conditioner, reduce mouth of pipe quantity that the gas exhaust piping of compressor 4 connected and
The length of pipe of shunting, the first pipeline 51 of air conditioner of the present invention is connected with the second pipeline 52 using parallel way, makes high temperature cold
Matchmaker is after one of pipeline in flowing into the first pipeline 51 and the second pipeline 52, then branches in another pipeline.
Specifically, in one embodiment of the invention, the first end of the first pipeline 51 is connected on the second pipeline 52, i.e.,
Gas exhaust piping of second pipeline 52 directly with compressor 4 is connected, and the first end of the first pipeline 51 is connected on the second pipeline 52.This
Sample, the high temperature refrigerant that the exhaust outlet 41 of compressor 4 is discharged, a portion is to continue with being limited along original refrigerant circulation circuit
Refrigerant flow direction flow into indoor heat exchanger 1, another part is to be flowed into from the first end of the second pipeline 52 in the second pipeline 52, and
And, that high temperature refrigerant flows to the first pipeline 51 in the second pipeline 52 and when connecing position, the part refrigerant is split again, its
A middle part continues that the gas returning port 42 of compressor 4 is flowed and flowed to along the second pipeline 52, and another part is to branch to the first pipe
Road 51, and flow to outdoor heat exchanger 2 along the first pipeline 51.
Or, the first end of the second pipeline 52 is connected on the first pipeline 51, i.e. the first pipeline 51 directly with compressor 4
Gas exhaust piping is connected, and the first end of the second pipeline 52 is connected on the first pipeline 51.So, the exhaust outlet 41 of compressor 4 is arranged
The high temperature refrigerant gone out, the refrigerant flow direction that a portion is to continue with being limited along original refrigerant circulation circuit flows into indoor heat exchanger
1, another part is to be flowed into from the first end of the first pipeline 51 in the first pipeline 51, also, high temperature refrigerant is in the first pipeline 51
Flow to the second pipeline 52 and when connecing position, the part refrigerant is split again, and a portion continues along the first pipeline 51
Flow and flow to outdoor heat exchanger 2, another part is to branch to the second pipeline 52, and flows to compressor along the second pipeline 52
4 gas returning port 42.
In embodiment, throttling arrangement 3 is connected on the refrigerant pipeline between outdoor heat exchanger 2 and indoor heat exchanger 1, this
Second end of the first pipeline 51 of invention is connected to the refrigerant pipe section between the first end of outdoor heat exchanger 2 and throttling arrangement 3,
So, the high temperature refrigerant of the first pipeline 51 outflow is to flow into outdoor heat exchange again with after the refrigerant of throttling arrangement 3 is mixed
In device 2.The advantage of this structure is, the refrigerant of outdoor heat exchanger 2 is flowed to when flowing through throttling arrangement 3 by indoor heat exchanger 1,
Part gaseous coolant therein can be throttled into liquid refrigerants, therefore, in order to reduce the content of this operative liquid refrigerant, the present invention
Second end of the second pipeline 52 is connected to the refrigerant pipe section between the first end of outdoor heat exchanger 2 and throttling arrangement 3, this
Sample, it is possible to use the temperature of the heat lift liquid refrigerants of high temperature refrigerant, it is in gaseous coolant to make its heating vaporization.
In embodiment, the first pipeline 51 is provided with the first control valve for being used for controlling the first pipeline 51 to turn on or block
61, when the first control valve 61 is opened, the first pipeline 51 is in the conduction state, and the high temperature refrigerant that compressor 4 is discharged can be via
First pipeline 51 flows to outdoor heat exchanger 2, and when the first control valve 61 is closed, the first pipeline 51 is in blocking state, compression
The high temperature refrigerant that machine 4 is discharged can not flow to outdoor heat exchanger 2 via the first pipeline 51.
Second pipeline 52 is provided with the second control valve 62 for being used for controlling the second pipeline 52 to turn on or block, in the second control
When valve 62 is opened, the second pipeline 52 is in the conduction state, and the high temperature refrigerant that compressor 4 is discharged can be flowed to via the second pipeline 52
The gas returning port 42 of compressor 4, and when the second control valve 62 is closed, the second pipeline 52 is in blocking state, what compressor 4 was discharged
High temperature refrigerant can not flow to the gas returning port 42 of compressor 4 via the second pipeline 52.
Meanwhile, can respectively it be realized to flow direction by the first control valve 61 of regulation and the flow aperture of the second control valve 62
The regulation of the cold medium flux of outdoor heat exchanger 2 and the gas returning port 42 of compressor 4.
Fig. 2 is a flow chart of the control method of the air conditioner of the present invention according to shown by an exemplary embodiment.
The invention provides a kind of control method of above-mentioned air conditioner, the sky shown in previous embodiment can be applied to
The Defrost operation control of device is adjusted, specifically, control method includes：
S201, outdoor heat exchanger need defrosting when, air conditioner is run with defrosting mode；
In embodiment, outdoor unit heat exchanger needs situation about defrosting mainly to include two kinds：
One kind is user after finding that frosting problem occurs in outdoor heat exchanger, by remote control or air conditioner body
Control panel inputs the instruction of air-conditioner defrosting, so, after the instruction for the defrosting that user's input is received in air conditioner, it is possible to
Control air conditioner is run with the defrosting mode set；
Another is the defrosting condition whether air conditioner automatic decision has reached setting, is meeting the defrosting condition of setting
When, then air conditioner can be controlled to be run with defrosting mode, for example, the defrosting condition set is less than current work as outdoor environment temperature
Outdoor frosting critical temperature value under condition, when outdoor environment environment temperature is less than outdoor frosting critical temperature value, outdoor environment
In steam gradually congealed into ice in the outer surface of outdoor heat exchanger frost layer, air conditioner is accomplished by carrying out defrost to outdoor heat exchanger
The frost condensed on processing, the outer surface to avoid outdoor heat exchanger is excessive
When air conditioner of the present invention is run with defrosting mode, refrigerant flow direction flows to identical with the refrigerant that heating mode is limited.
Therefore, if air conditioner outdoor heat exchanger when starting shooting operation is accomplished by defrosting, the refrigerant of air conditioner is controlled with heating mould
The flow direction flowing of formula identical refrigerant；Or, outdoor heat exchanger needs to be removed after operation of air conditioner heating mode certain time
Frost, then keep the refrigerant in refrigerant circulation circuit to flow to constant.
S202, control open the second control valve in the first control valve and the second pipeline on the first pipeline.
After air conditioner operation defrosting mode, the first control valve on the first pipeline is opened, the height that compressor is discharged
Warm refrigerant is imported in outdoor heat exchanger, so that the frost condensed on outdoor heat exchanger is melted, reaches the purpose of defrosting ice-melt；The
The second control valve on two pipelines is opened, and the high temperature refrigerant that compressor is discharged is directed into the gas returning port of compressor, so that convection current
The liquid refrigerants for returning compressor carries out heat temperature raising vaporization, and the coolant quantity of liquid is condensed into when flowing through outdoor heat exchanger to reduce,
Ensure compressor and the overall safe and effective operation of air-conditioning.
Specifically, control method of the present invention also includes：
Obtain the suction temperature of compressor when air conditioner is run with defrosting mode；
In embodiment, the suction temperature of compressor can reflect the real time temperature for the refrigerant for flowing back to compressor, return air temperature
Degree is different, then the content for flowing back to liquid refrigerants mixed in the gas-liquid binary states refrigerant of compressor is also different, therefore, suction temperature
Lower, then the content of liquid refrigerants is higher；Suction temperature is higher, then the content of liquid refrigerants is lower.It therefore, it can according to air-conditioning
Device runs suction temperature during defrosting mode, it is determined that the flow of the high temperature refrigerant for the vaporization that heated up to liquid refrigerants.
In embodiment, the first temperature sensor is provided with the gas returning port of compressor, can be used for detecting compressor
Suction temperature；It should be appreciated that suction temperature is the refrigerant temperature for the gas returning port for flowing to compressor.
According to suction temperature, calculate and obtain according to equation below：
K2=A+B*Ts+C*Ts2+D*Ts3,
Wherein, K2 is the second defrosting flow aperture, and Ts is the suction temperature of compressor, and A is the first constant, and B is the first meter
Coefficient is calculated, C is the second design factor, and D is the 3rd design factor.
For example, for the air conditioner that a certain heating capacity is 8KW, before air conditioner dispatches from the factory, being determined respectively according to experiment
The value of the second corresponding defrosting flow aperture, can fit following public affairs at Ts=-15 DEG C, -10 DEG C, -5 DEG C, 0 DEG C, 5 DEG C
Formula：
K2=177.6+-10.8*Ts-0.2*Ts2-0.097*Ts3,
Wherein, the first constant A is 177.6, and the first design factor B is -10.8, and the second design factor C is -0.2, the 3rd meter
It is -0.097 to calculate coefficient D.
So, above-mentioned fitting formula can be preset in air conditioner；In air conditioner practical work process, pass through first
Temperature sensor detects the suction temperature Ts of compressor, and suction temperature Ts is substituted into above-mentioned fitting formula, you can calculate
The second corresponding defrosting flow aperture under to current working.
By the flow aperture regulation of the second control valve to the second defrosting flow aperture；So, it can make along the second pipeline stream
To the high temperature refrigerant amount of the gas returning port of compressor, the heating vaporization required coolant quantity of liquid refrigerants is met, can be with complete by refrigerant
It is compressed in a gaseous form in machine entirely, reduces the generation of compressor liquid hammer problem.
In embodiment, the exhaust outlet of compressor is also equipped with a temperature sensor, the exhaust available for detection compressor
Temperature, it is possible to the second defrosting flow aperture is further adjusted according to delivery temperature.
For example, delivery temperature is higher, the heat entrained by the high temperature refrigerant of specific discharge is more, then can control reduction by
Two defrosting flow apertures；And delivery temperature is lower, the heat entrained by the high temperature refrigerant of specific discharge is fewer, then can control to carry
High second defrosting flow aperture.So, Secondary Control is carried out to the second defrosting flow aperture according to the delivery temperature of compressor, can
So that branching to the high temperature refrigerant amount of the second pipeline can match with current working, it is to avoid the unnecessary loss of refrigerant heat.
In embodiment, when air conditioner runs defrosting mode, because the frost of outdoor heat exchanger is gradually melted, therefore room
Heat needed for external heat exchanger defrosting is gradually decreased, and refrigerant flows through outdoor heat exchanger institute liberated heat and also gradually decreased, then exists
The suction temperature of defrosting multistage compressor is gradually stepped up.
Therefore, in order to avoid the extra consumption of refrigerant heat, control method of the invention also includes：
When air conditioner is run with defrosting mode, if the suction temperature of compressor is less than the suction temperature threshold value of setting
When, control gradually steps up the flow aperture of the first control valve with the very first time interval set；Specifically, air conditioner brings into operation
During defrosting mode, the first control valve is opened with initial opening k, is improved to aperture k1, is improved after t2 minutes to aperture after t1 minutes
K2, by that analogy, until the maximum opening of the first control valve is reached, in this course, if being unsatisfactory for the return-air of compressor
Temperature is less than the condition of the suction temperature threshold value of setting, then stops the flow aperture for continuing to improve the first control valve.
For example, under a certain operating mode, air-conditioning is opened with defrosting mode and run, the initial unlatching of the first control valve is 100B,
Aperture is improved to 200B after 1st minute, aperture is improved to 350B after the 3rd minute, until maximum opening 500B；This process
In, if the suction temperature of compressor stops the first control valve not less than the suction temperature threshold value set after the 3rd minute
Flow aperture from 350B continue improve.
After operation of air conditioner defrosting mode certain time, if the suction temperature of compressor is more than or equal to returning for setting
During gas temperature threshold, control gradually reduces the flow aperture of the first control valve with the second time interval set.Specifically, in sky
When adjusting device operation defrosting mode, the suction temperature in the t2 times is less than the suction temperature threshold value of setting；After the t2 times, return-air
Temperature is more than or equal to the suction temperature threshold value of setting, then the aperture of the first control valve is reduced into k3, t4 points after t3 minutes
Aperture k4 is reduced to after clock, the like, until the first control valve is closed in control.
For example, under the operating mode of previous embodiment, the suction temperature of compressor is more than or equal to setting after the 3rd minute
Suction temperature threshold value, then be reduced to valve opening 150B after the 300, the 5th minute, thereafter complete closure by the aperture of the 4th minute from 350B,
Defrosting terminates.
So, by by the flow aperture of the first control valve using the time as interval being adjusted stage by stage, it is ensured that
The stationarity of defrosting mode overall operation, prevents that flow velocity changes turbulent flow in too fast caused pipeline in refrigerant pipeline, disorderly
The appearance of the problems such as stream.
In embodiment, control method also includes：
Obtain the feed liquor temperature of outdoor heat exchanger；In embodiment, the refrigerant flow direction and fortune of air conditioner operation defrosting mode
Refrigerant during row heating mode flows to identical, and therefore, first port is the feed liquor port of outdoor heat exchanger, the feed liquor detected
Temperature is after the refrigerant flowed out from the second end of the first pipeline is mixed with the refrigerant that indoor heat exchanger flows to outdoor heat exchanger
Refrigerant temperature.
In embodiment, three-temperature sensor is provided with the first port of outdoor heat exchanger, can be outdoor with detection
The feed liquor temperature of heat exchanger.
Determine the outdoor dew-point temperature of outdoor environment；Outdoor dew-point temperature is that the vaporous water in outdoor environment is condensed into liquid
The critically weighted of water, when outdoor environment temperature is less than outdoor dew-point temperature, the vaporous water in outdoor environment is condensed into liquid
The water of water is more, and steam liquefying speed is very fast；And when outdoor environment temperature is higher than outdoor dew-point temperature, in outdoor environment
The water that vaporous water is condensed into aqueous water is less, and aqueous water vaporization rate is very fast.
Therefore, when the temperature of the refrigerant of outdoor heat exchanger is less than outdoor dew-point temperature, because refrigerant is from outdoor heat exchange
Device outwards releases heat, therefore, and the air around outdoor heat exchanger is after refrigerant liberated heat is absorbed, and air themperature is all the time
Outdoor dew-point temperature is also less than less than the own temperature of refrigerant, i.e. air themperature, then illustrates the room of outdoor heat exchanger the week side of boss
External environment temperature, which has also reached, can condense the temperature conditionss of frost.So, in the control method of the present invention, room can be passed through
The comparison of outer dew-point temperature and refrigerant temperature, judges whether there are problems that frosting on the outer surface of outdoor heat exchanger.
The 4th temperature sensor is provided with embodiment, on outdoor unit, can be used for detecting outdoor environment temperature, with root
Calculated according to outdoor environment temperature and determine outdoor dew-point temperature.
Specifically, outdoor dew-point temperature is calculated according to equation below and obtained：
Tes=A*Tao2+ B*Tao-C,
Wherein, Tes is outdoor dew-point temperature, and Tao is outdoor environment temperature, and A is the first dew-point temperature coefficient, and B is second
Dew-point temperature coefficient, C is the second constant.
If feed liquor temperature is less than outdoor dew-point temperature, the 3rd of the throttling arrangement of air conditioner is determined according to suction temperature
Defrost flow aperture；
Specifically, the 3rd defrosting flow aperture of the throttling arrangement of air conditioner is determined according to suction temperature, including：
If Tes >=Te >=Tes-D, the 3rd defrosting flow aperture is calculated according to equation below to be obtained：
K3=E*Tc+F,
Wherein, Te is feed liquor temperature, and Tc is suction temperature, and D is temperature deviation threshold value, and K3 is the 3rd defrosting flow aperture, E
For aperture design factor, F is the 3rd constant；
If Te ＜ Tes-D, the 3rd defrosting flow aperture is the maximum opening of throttling arrangement.
Using the 3rd defrosting flow aperture as air conditioner run with defrosting mode when throttling arrangement flow aperture.
Fig. 3 is another flow chart of the control method of the present invention according to shown by an exemplary embodiment.
In the application scenarios shown in Fig. 3, the workflow of control method of the present invention is as follows：
S301, outdoor heat exchanger need defrosting when, air conditioner is run with defrosting mode；
In embodiment, when receiving the defrosting instruction of user's input, or in air conditioner self-inspection to satisfaction setting
During defrosting condition, control air conditioner is run with defrosting mode；
The first control valve and the second control valve are opened in S302, control；
The suction temperature of compressor when S303, acquisition air conditioner are run with defrosting mode；
S304, according to suction temperature, determine the second defrosting flow aperture of the second control valve；
In embodiment, the flow aperture of the second control valve is calculated according to equation below to be obtained：
K2=A+B*Ts+C*Ts2+D*Ts3,
Wherein, K2 is the second defrosting flow aperture, and Ts is the suction temperature of compressor, and A is the first constant, and B is the first meter
Coefficient is calculated, C is the second design factor, and D is the 3rd design factor.
S305, open the second control valve, and by the flow aperture regulation of the second control valve to second defrosting flow；
S306, judge compressor suction temperature whether be less than setting suction temperature threshold value, if it is, perform step
S307, if it is not, then performing step 308；
S307, control gradually step up the flow aperture of the first control valve with the very first time interval set；
S308, control gradually reduce the flow aperture of the first control valve with the second time interval set；
S309, the feed liquor temperature and outdoor environment temperature for obtaining outdoor heat exchanger；
S310, the outdoor dew-point temperature for determining according to outdoor environment temperature outdoor environment；
In embodiment, outdoor dew-point temperature is calculated according to equation below and obtained：Tes=A*Tao2+ B*Tao-C, wherein,
Tes is outdoor dew-point temperature, and Tao is outdoor environment temperature, and A is the first dew-point temperature coefficient, and B is the second dew-point temperature coefficient, C
For the second constant；
S311, judge whether feed liquor temperature is less than outdoor dew-point temperature, if it is, step S312 is performed, if it is not, then
Perform step S314；
S312, determined according to suction temperature air conditioner throttling arrangement the 3rd defrosting flow aperture；
If specifically, Tes >=Te >=Tes-D, the 3rd defrosting flow aperture is calculated according to equation below to be obtained：K3=
E*Tc+F, wherein, Te is feed liquor temperature, and Tc is suction temperature, and D is temperature deviation threshold value, and K3 is the 3rd defrosting flow aperture, E
For aperture design factor, F is the 3rd constant；
If Te ＜ Tes-D, the 3rd defrosting flow aperture is the maximum opening of throttling arrangement；
S313, using the 3rd defrosting flow aperture as air conditioner run with defrosting mode when the flow of throttling arrangement open
Degree；
S314, maintain throttling arrangement flow aperture it is constant.
Present invention also offers a kind of control device, available for the air conditioner shown by Fig. 1 embodiment to outdoor heat exchange
Cold medium flux control when device defrosts, control device mainly includes：
First control unit, for when outdoor heat exchanger needs defrosting, air conditioner to be run with defrosting mode；
Second control unit, for controlling to open the second control in the first control valve and the second pipeline on the first pipeline
Valve.
In embodiment, control device also includes：First acquisition unit, when being run for obtaining air conditioner with defrosting mode
Compressor suction temperature；First determining unit, for according to suction temperature, determining the second defrosting flow of the second control valve
Aperture；First adjustment unit, for by the flow aperture regulation of the second control valve to second defrosting flow aperture.
In embodiment, the flow aperture of the second control valve is calculated according to equation below to be obtained：K2=A+B*Ts+C*Ts2+
D*Ts3, wherein, K2 is the second defrosting flow aperture, and Ts is the suction temperature of compressor, and A is the first constant, and B calculates for first
Coefficient, C is the second design factor, and D is the 3rd design factor.
In embodiment, control device also includes the second adjustment unit, and the second adjustment unit is used for：When air conditioner to defrost
During mode operation, if the suction temperature of compressor is less than the suction temperature threshold value of setting, the very first time to set is controlled
Interval gradually steps up the flow aperture of the first control valve；If the suction temperature of compressor is more than or equal to the suction temperature of setting
During threshold value, control gradually reduces the flow aperture of the first control valve with the second time interval set.
In embodiment, control device also includes：Second acquisition unit, the feed liquor temperature for obtaining outdoor heat exchanger；
Second determining unit, the outdoor dew-point temperature for determining outdoor environment；3rd determining unit, if be less than for feed liquor temperature
Outdoor dew-point temperature, then determine the 3rd defrosting flow aperture of the throttling arrangement of air conditioner according to suction temperature；Second regulation is single
Member, for using the 3rd defrosting flow aperture as air conditioner run with defrosting mode when throttling arrangement flow aperture.
In embodiment, control device also includes：3rd acquiring unit, the outdoor environment temperature for obtaining outdoor environment
Degree；4th determining unit, the outdoor dew-point temperature for determining outdoor environment according to outdoor environment temperature；Outdoor dew-point temperature is pressed
Calculate and obtain according to equation below：Tes=A*Tao2+ B*Tao-C, wherein, Tes is outdoor dew-point temperature, and Tao is outdoor environment temperature
Degree, A is the first dew-point temperature coefficient, and B is the second dew-point temperature coefficient, and C is the second constant.
In embodiment, the 3rd determining unit determines the 3rd defrosting flow of the throttling arrangement of air conditioner according to suction temperature
Aperture, its process includes：If Tes >=Te >=Tes-D, the 3rd defrosting flow aperture is calculated according to equation below to be obtained：K3
=E*Tc+F, wherein, Te is feed liquor temperature, and Tc is suction temperature, and D is temperature deviation threshold value, and K3 is the 3rd defrosting flow aperture,
E is aperture design factor, and F is the 3rd constant；If Te ＜ Tes-D, the 3rd defrosting flow aperture is the maximum of throttling arrangement
Aperture.
It should be appreciated that the invention is not limited in the flow and structure for being described above and being shown in the drawings,
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is only limited by appended claim
System.
Claims (10)
1. a kind of air conditioner, the air conditioner includes indoor heat exchanger, outdoor heat exchanger, throttling arrangement and compressor, the room
Interior heat exchanger, the outdoor heat exchanger, the throttling arrangement and the compressor connect and compose refrigerant circulation by refrigerant pipeline
Loop, it is characterised in that the air conditioner also includes the first pipeline and the second pipeline, wherein, the first end of first pipeline
Connect the exhaust outlet of the compressor, the second end of first pipeline is connecting the outdoor heat exchanger with the indoor heat exchange
The first port of device connection；The first end of second pipeline connects the exhaust outlet of the compressor, and the of second pipeline
Two ends connect the compressor return air mouthful.
2. air conditioner according to claim 1, it is characterised in that first pipeline is associated with second and is connected in parallel；
The first end of first pipeline is connected on second pipeline；Or,
The first end of second pipeline is connected on first pipeline.
3. air conditioner according to claim 1 or 2, it is characterised in that first pipeline is provided with described for controlling
The first control valve that first pipeline is turned on or blocked；Second pipeline, which is provided with, to be used to control second pipeline to turn on or hinder
The second disconnected control valve.
4. a kind of control method of air conditioner as claimed in claim 3, it is characterised in that the control method includes：
When the outdoor heat exchanger needs defrosting, the air conditioner is run with defrosting mode；
Second control valve in first control valve and second pipeline on first pipeline is opened in control.
5. control method according to claim 4, it is characterised in that the control method also includes：
Obtain the suction temperature of the compressor when air conditioner is run with defrosting mode；
According to the suction temperature, the second defrosting flow aperture of second control valve is determined；
By the flow aperture regulation of second control valve to the described second defrosting flow aperture.
6. the control method of air conditioner according to claim 5, it is characterised in that the flow aperture of second control valve
Calculate and obtain according to equation below：
K2=A+B*Ts+C*Ts2+D*Ts3,
Wherein, K2 is the described second defrosting flow aperture, and Ts is the suction temperature of the compressor, and A is the first constant, and B is the
One design factor, C is the second design factor, and D is the 3rd design factor.
7. the control method of air conditioner according to claim 4, it is characterised in that the control method also includes：
When the air conditioner is run with defrosting mode, if the suction temperature of the compressor is less than the return air temperature of setting
When spending threshold value, control gradually steps up the flow aperture of first control valve with the very first time interval set；
If the suction temperature of the compressor is more than or equal to the suction temperature threshold value of the setting, control to set
The second time interval gradually reduce the flow aperture of first control valve.
8. the control method of air conditioner according to claim 4, it is characterised in that the control method also includes：
Obtain the feed liquor temperature of the outdoor heat exchanger；
Determine the outdoor dew-point temperature of outdoor environment；
If the feed liquor temperature is less than the outdoor dew-point temperature, the section of the air conditioner is determined according to the suction temperature
Flow the 3rd defrosting flow aperture of device；
Using the described 3rd defrosting flow aperture as the air conditioner run with defrosting mode when the throttling arrangement flow
Aperture.
9. control method according to claim 8, it is characterised in that the outdoor dew-point temperature of the determination outdoor environment,
Including：
Obtain the outdoor environment temperature of the outdoor environment；
The outdoor dew-point temperature of outdoor environment is determined according to the outdoor environment temperature；
The outdoor dew-point temperature is calculated according to equation below and obtained：
Tes=A*Tao2+ B*Tao-C,
Wherein, Tes is the outdoor dew-point temperature, and Tao is the outdoor environment temperature, and A is the first dew-point temperature coefficient, and B is
Second dew-point temperature coefficient, C is the second constant.
10. control method according to claim 9, it is characterised in that described that the sky is determined according to the suction temperature
The 3rd defrosting flow aperture of the throttling arrangement of device is adjusted, including：
If Tes >=Te >=Tes-D, the 3rd defrosting flow aperture is calculated according to equation below to be obtained：
K3=E*Tc+F,
Wherein, Te is the feed liquor temperature, and Tc is the suction temperature, and D is temperature deviation threshold value, and K3 is the described 3rd defrosting stream
Aperture is measured, E is aperture design factor, and F is the 3rd constant；
If Te ＜ Tes-D, the 3rd defrosting flow aperture is the maximum opening of the throttling arrangement.
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| CN109442792A (en) * | 2018-11-06 | 2019-03-08 | 奥克斯空调股份有限公司 | A kind of air conditioner except defrosting system and defrosting control method and air conditioner |
| CN111023613A (en) * | 2019-11-27 | 2020-04-17 | 合肥通用制冷设备有限公司 | Accurate temperature control refrigerating system |
| CN112611074A (en) * | 2020-11-30 | 2021-04-06 | 青岛海尔空调电子有限公司 | Air conditioning system and defrosting control method, storage medium and control device thereof |
| CN112611073A (en) * | 2020-11-30 | 2021-04-06 | 青岛海尔空调电子有限公司 | Air conditioning system and defrosting control method, storage medium and control device thereof |
| CN113188265A (en) * | 2021-04-14 | 2021-07-30 | 三一汽车起重机械有限公司 | Air conditioner cold air prevention control system and method and air conditioner |
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| CN107152820B (en) | 2020-05-29 |
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Effective date of registration: 20200910 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Co-patentee after: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20201104 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee after: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee before: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. |