CN101135487A - Device for preventing compressor from start-up with liquid of multiple air-conditioning unit - Google Patents
Device for preventing compressor from start-up with liquid of multiple air-conditioning unit Download PDFInfo
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- CN101135487A CN101135487A CNA2006101120523A CN200610112052A CN101135487A CN 101135487 A CN101135487 A CN 101135487A CN A2006101120523 A CNA2006101120523 A CN A2006101120523A CN 200610112052 A CN200610112052 A CN 200610112052A CN 101135487 A CN101135487 A CN 101135487A
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Abstract
The invention discloses a device of multiple air conditioners set capable of preventing compressor with liquid from starting. The apparatus makes gas-liquid separator of the same machine set outdoor machine connect with outdoor heat exchanger outlet via pipeline, and the said pipeline of different machine set interconnect via gas recovery adapter. The first electromagnetic valve is mounted on the pipeline between the said gas recovery adapter and gas-liquid separator; the secondary electromagnetic valve is mounted in the pipeline of the gas recovery adapter and the outdoor heat exchanger outlet. When multiple air conditioner set are working for heating and partial machine set are stopping, the first electromagnetic valve of the working machine set is on; the secondary electromagnetic valve is cut-off, the first electromagnetic valve of the stop machine set is cut-off, the secondary electromagnetic valve is on.
Description
Technical field
The present invention relates to VRF Air Conditioning System, relate in particular to a kind of device of preventing compressor from start-up with liquid of multiple air-conditioning unit.
Background technology
VRF Air Conditioning System is the single cooling cycle system that the direct vaporation-type indoor set by or several similar and different patterns of off-premises station linking number platform, capacity constitutes, can be to the air after or several different zones directly provide processing.VRF Air Conditioning System is with common split-type air conditioner centralization, maximization, intelligentized product, and its characteristics mainly are the indoor and outdoor machine independent assortments, independent control, and it is flexible, and the characteristics of efficient energy-saving more and more receive the concern of industry.
Also there are some special problems in VRF Air Conditioning System because itself.Wherein, the work of heating might cause compressor band liquid to start, and then the damage compressor is a serious problem.
Fig. 1 is the fundamental diagram of a kind of VRF Air Conditioning System under the prior art.The outer unit of multi-joint unit room shown in Figure 1 is two off-premises station parallel connections, and every off-premises station is interior by two compressor parallel connections.In fact, the off-premises station unit can be outer machine parallel connection more than two, and every off-premises station inside also can be the compressor parallel more than two, and principle for convenience of description among the present invention is an example with the connected mode among Fig. 1 only.The reason that heats operation principle and cause compressor band liquid to start of VRF Air Conditioning System is described below in conjunction with this figure.
When VRF Air Conditioning System was carried out heating operation, the overheated gaseous coolant of HTHP was discharged from compressor 101,102 exhaust sides of off-premises station 1, mixed the back by cross valve 103, tracheae stop valve 104 at exhaust outlet, entered online pipe; The course of work of off-premises station 2 is identical with off-premises station 1; After the overheated gaseous coolant of the HTHP of two off-premises station 1,2 discharges mixes by online pipe, enter indoor set (figure does not show).The indoor heat exchanger of start indoor set is equivalent to condenser at this moment, the supercooled liquid refrigerant of warm high pressure during the overheated gaseous coolant of described HTHP is condensed in indoor heat exchanger, and the heat that discharges in the condensation heats the room, place.In the supercooled liquid refrigerant of warm high pressure get back to off-premises station 1 respectively by connecting machine pipe branch, in the off-premises station 2, pass through the electric expansion valve 106 of above-mentioned off-premises station then, 206 throttlings, become the refrigerant air-liquid mixture of low-temp low-pressure, and inlet chamber external heat exchanger 107, evaporation in 207, when the refrigerant air-liquid mixture of low-temp low-pressure at outdoor heat exchanger 107, in the time of can not evaporating fully in 207, will flow to the gas-liquid separator 108 that is connected with the compressor low-pressure side by some refrigerant liquid, in 208, simultaneously from gas-liquid separator 108, isolated refrigerant gas then enters in each compressor of this off-premises station and compresses in 208, thus beginning new round heat exchange circulation.
In actual use, each unit of VRF Air Conditioning System often is not whole work.For example; in above-mentioned VRF Air Conditioning System shown in Figure 1; only need to start off-premises station 1 probably and heat circulation; at this moment; in order to prevent to flow to the off-premises station 2 that is in low-pressure state owing to not working from the liquid refrigerants that indoor set flows out; need be by the electric expansion valve 206 of closing this off-premises station 2; magnetic valve 205 etc.; utilize the characteristics that check valve 209 can not adverse current; the low-pressure side of this off-premises station and the high-pressure side of other off-premises stations are separated; by above-mentioned quarantine measures, off-premises station 2 does not have liquid refrigerant flows to off-premises station 2 by pipeline compressor low-pressure side after shutdown.
But a lot of parts of air-conditioning system as magnetic valve 205, check valve 209, cross valve 203, electric expansion valve 206, when high pressure that it cut off and low pressure reduction reach certain scope, will produce certain leakage between the high-low pressure.For the separate unit off-premises station, this small leakage is what allow to exist within the specific limits, because this small leakage is inessential for the system of separate unit off-premises station, can not cause damage to system; But for the multi-joint system of outer machine; this small leakage causes refrigerant constantly to leak into off-premises station 2 low-pressure sides of shutdown; finally be accumulated in the gas-liquid separator 208; because environment temperature is lower; these refrigerants can be with liquid form in gas-liquid separator 208 accumulation; and be on the increase, so that liquid refrigerants can enter the low-pressure side of compressor 201,202.Compressor can only compress the refrigerant of gaseous state, when the refrigerant of liquid state enters compressor, can cause the compressor start difficulty, even produces the hydraulic pressure state that contracts, and compressor is thoroughly damaged.Simultaneously,, also can cause the coolant quantity in the circulation line to reduce, make the whole system fluctuation of service because the refrigerant in the circulation line of off-premises station 1 constantly is leaked to the low-pressure side of off-premises station 2 and can't returns in the working cycles pipeline of off-premises station 1.
For addressing the above problem, the applicant has proposed related art scheme.The number of patent application that the applicant proposed on April 27th, 2006 is 200610076143.4 Chinese patent application, proposes a kind of solution of the above problems.This technical scheme is to increase the balance pipe that is communicated with each off-premises station low-pressure side for VRF Air Conditioning System; this balance pipe can make the low-pressure lateral pressure balance of VRF Air Conditioning System; shut down unit because the refrigerant of device leakage accumulation can flow to the low-pressure side of the unit of work by balance pipe; make the refrigerant of shutting down unit gatherings of can breaking, the situation of band liquid startup appears in the compressor of avoiding shutting down unit when starting.It is unexposed to it should be noted that such scheme proposes present patent application fashion the applicant, does not belong to the prior art of Patent Law definition.
Generally speaking, above-mentioned solution can solve the problem that refrigerant is assembled and compressor band liquid starts of shutting down unit preferably, and still, also there are some defectives in this scheme.At first, the balance pipe of this scheme just connects the low-pressure side of each unit of multi-connected air conditioner, and the refrigerant of shutting down unit has become liquid state in its low-pressure side, produce the liquid refrigerants accumulation, and pressure reduces also.When the refrigerant of shutting down the unit accumulation enters work unit low-pressure side owing to the pressure effect by balance pipe, shut down in the unit and accumulated many refrigerants.Shutting down under the more situation of unit, the refrigerant of all unit accumulation is enough to influence the coolant quantity of work unit, makes its fluctuation of service.Secondly; unit is more shutting down; pipeline between the unit is than under the long situation; because the resistance of pipeline own is bigger, make refrigerant that above-mentioned pressure reduced and pressure differential between the work unit low-pressure side be not enough to overcome pipe resistance, realize the mobile of refrigerant; refrigerant is constantly assembled; even might cause the compressor of shutting down unit to start once more the time, the situation that band liquid starts appears, damage compressor.
Summary of the invention
Deficiency at the applicant's proposition in the first to file existence, the technical problem that the present invention solves is, a kind of device of preventing compressor from start-up with liquid of multiple air-conditioning unit is provided, this device can make VRF Air Conditioning System when heating work, significantly reduces the refrigerant of shutting down unit and assembles; Simultaneously, this device can provide the enough pressure differentials that flow to work unit one side for leaking into the refrigerant of shutting down in the unit, to overcome the mobile insufficient pressure problem of refrigerant that causes owing to pipe resistance.This device is compared with above-mentioned patent application, can better solve compressor band liquid and start problem.
The device of a kind of preventing compressor from start-up with liquid of multiple air-conditioning unit provided by the invention, comprise: outlet is connected by pipeline with outdoor heat exchanger with the gas-liquid separator of same unit off-premises station, and this pipeline of different units reclaims to take over by gas and is connected, on the pipeline between described gas recovery adapter and the gas-liquid separator, first magnetic valve is installed; On the pipeline between described gas recovery adapter and the outdoor heat exchanger outlet, second magnetic valve is installed; When VRF Air Conditioning System heats work and part of generating units shutdown, first solenoid valve conduction of work unit, second magnetic valve turn-offs; First magnetic valve of shutting down unit turn-offs second solenoid valve conduction.
Preferably, in VRF Air Conditioning System when refrigeration, when VRF Air Conditioning System heats and all unit is all worked and VRF Air Conditioning System when all quitting work,, described first magnetic valve, second magnetic valve all are in closed condition.
Preferably, the described gas that is connected at each unit reclaims on the pipeline of taking over, and corresponding to each unit gas is installed and reclaims stop valve.
The device of preventing compressor from start-up with liquid of multiple air-conditioning unit provided by the invention, between the different units of VRF Air Conditioning System, increase gas and reclaim adapter, and make this gas reclaim the high and low pressure side that receiving tube connects each unit off-premises station, simultaneously, installing magnetic valve additional on pipeline controls.For shutting down unit, the outlet of its outdoor heat exchanger is connected with the off-premises station low-pressure side of work unit.Therefore, can make the refrigerant of leakage directly reclaim the low-pressure side that adapter enters the work unit, and can at first not assemble in the low-pressure side of shutting down unit by gas.
In addition, in the scheme that the applicant proposes, adopt the backflow of the pressure differential realization refrigerant between each off-premises station low-pressure side in 200610076143.4 patents.In the technical program, directly make the refrigerant of shutting down unit outdoor heat exchanger outlet outflow return work unit low-pressure side.Compare with the technical scheme of the applicant's last patent; pressure differential between outdoor heat exchanger outlet pressure that the present invention adopts and the work unit low-pressure side is bigger; therefore, the present invention can make the refrigerant that is leaked to the shutdown unit have bigger pressure to overcome pipe resistance, flows to the work unit.
For above-mentioned reasons, the present invention can better solve the band liquid startup problem of VRF Air Conditioning System.
Description of drawings
Fig. 1 is the fundamental diagram of VRF Air Conditioning System under the prior art;
Fig. 2 is the fundamental diagram of first embodiment of the invention.
The specific embodiment
Please, be the fundamental diagram of first embodiment of the invention referring to Fig. 2.This embodiment improve to obtain on the prior art basis, wherein with the prior art of Fig. 1 in identical device use former label to indicate.
VRF Air Conditioning System shown in Figure 2 has two off-premises stations, and every outer facility have two compressors.The course of work and this machine of VRF Air Conditioning System with many off-premises stations is similar.
As can be seen from Figure 2, this VRF Air Conditioning System and prior art difference shown in Figure 1 are that the gas-liquid separator 108 of described off-premises station 1 is connected by the outlet of pipeline with outdoor heat exchanger 107; The gas-liquid separator 208 of described off-premises station 2 is connected by the outlet of pipeline with outdoor heat exchanger 207; Between above-mentioned two connecting lines that lay respectively at off-premises station 1 and off-premises station 2, reclaim by gas and to take over 3 and connect.This gas reclaims tube connector 3 corresponding to each unit, a gas is installed reclaims stop valve, is respectively that gas reclaims stop valve 110, gas reclaims stop valve 210.Above-mentioned gas reclaims stop valve 110,210 and is used for cutting off when needed gas recovery adapter 3.
On the connecting line between the gas-liquid separator 108 of described gas recovery adapter 3 and described off-premises station 1, magnetic valve 111 is installed; Between the connecting line of the outdoor heat exchanger 107 of described gas recovery adapter 3 and described off-premises station 1, magnetic valve 112 is installed.Same, on the connecting line between the gas-liquid separator 208 of described gas recovery adapter 3 and described off-premises station 2, magnetic valve 211 is installed; Between the connecting line of the outdoor heat exchanger 207 of described gas recovery adapter 3 and described off-premises station 2, magnetic valve 212 is installed.
Below introduce said apparatus and realize preventing the operation principle of compressor band liquid startup.
Above-mentioned gas reclaims takes over 3; and the tube connector of inner junction chamber external heat exchanger of each unit and gas-liquid separator and be installed in the device that the magnetic valve on the above-mentioned pipeline is formed; its effect is to be in the state of heating at multi-connected air conditioner; and when having part of generating units to shut down, prevent to shut down the refrigerant that accumulation is leaked in the unit.When multi-connected air conditioner be not in heat duty or VRF Air Conditioning System be in heat duty when but all units are all worked and VRF Air Conditioning System when all quitting work, magnetic valve in the above-mentioned pipeline all is in closed condition, is equivalent to above-mentioned pipeline and does not exist.
Heat duty when multi-connected air conditioner is in, and the part of generating units of this multi-connected air conditioner is when shutting down, above-mentioned piping installation begins to play a role.For the course of work of above-mentioned pipeline is described, below in conjunction with Fig. 2, be example with off-premises station 2 normal operations, off-premises station 1 shutdown, the course of work and the principle of this device is described.
When off-premises station 2 operate as normal, the refrigerant condition of getting back to the outdoor unit from indoor set is the cold-producing medium subcooled liquid of middle temperature high pressure, this cold-producing medium subcooled liquid flows to the throttling arrangement of off-premises station 1 by the liquid pipe stop valve 105 of off-premises station 1, i.e. Bing Lian electric expansion valve 106 and check valve 109 places, at this moment, electric expansion valve 106 is in closed condition, check valve 109 is in the state for reverse not conducting, and therefore refrigerant can't enter follow-up pipeline by throttling arrangement in theory.But, in the reality, described electric expansion valve 106 and check valve 109 all can not be blocked pipeline fully, exist at the throttling arrangement two ends under the situation of bigger pressure reduction, the part refrigerant is by described electric expansion valve 106, check valve 109 throttlings, enter the outdoor heat exchanger 107 of off-premises station 1, flash to the gas liquid mixture of low pressure.At this moment, the if there is no described compressor band liquid starting drive that prevents, this part gas liquid mixture will enter gas-liquid separator 108, and its pressure will further reduce.In the present embodiment, because the described compressor band liquid starting drive that prevents has been installed, make the described refrigerant that exports the gas-liquid mixed volume morphing that flows out from outdoor heat exchanger 107 can flow to off-premises station 2, concrete process is as described below.
Under above-mentioned duty, the magnetic valve 112 that is in the off-premises station 1 of stopped status is opened, and magnetic valve 111 cuts out; The magnetic valve 212 of in running order off-premises station 2 cuts out, and magnetic valve 211 is opened.Because the work of the compressor 201,202 of off-premises station 2; make the described gas-liquid mixed refrigerant that is in low-pressure state by outdoor heat exchanger 107; its pressure is still much higher than the low-pressure side of off-premises station 2; therefore; this refrigerant process magnetic valve 112, gas recovery stop valve 110, gas recovery stop valve 210, magnetic valve 211 flow to the gas-liquid separator 208 of described off-premises station 2, and the refrigerant that forms the off-premises station 1 that is leaked to shutdown is back to the loop of off-premises station 2 low-pressure side gas-liquid separators 208.Be back to the refrigerant of gas-liquid separator 208, finally can enter compressor 201,202, the heat exchange circulation of a beginning new round with gas form.
From above-mentioned duty as can be known, present embodiment provides prevents compressor band liquid starting drive, can make to be leaked to the refrigerant of shutting down off-premises station 1 and not enter as yet before the gas-liquid separator 108, just under pressure, gets back to the low-pressure side of the off-premises station 2 of work.Therefore, the refrigerant of leakage can not accumulate in the gas-liquid separator 108 of off-premises station 1.Simultaneously; just exported the pressure of the refrigerant that flows out from described outdoor heat exchanger 107; more than the refrigerant pressure height that enters behind the gas-liquid separator 108; therefore; shutdown unit that impels the backflow of leakage refrigerant that the present embodiment piping installation is set up and the pressure differential between the work unit; than the applicant's pressure differential height by balance pipe formation in 200610076143.4 Chinese patent application; therefore; the device that present embodiment provides can make the refrigerant of leakage faster, be back to the low-pressure side of work unit more fully.Therefore, the device that present embodiment provides not only has and prevents that better compressor band liquid from starting effect, and can better stop work unit refrigerant to run off.
According to above embodiment as can be known, among this embodiment, the state of pipeline electromagnetic valve is the key of this device work of control.For different situations, the duty of magnetic valve is also different.To call the magnetic valve of installing on the described connecting line between gas recovery adapter 3 and each unit gas-liquid separator in the following text is magnetic valve 1; The magnetic valve of installing between the connecting line of the outdoor heat exchanger 107 of described gas recovery adapter 3 and each off-premises station is a magnetic valve 2.Supposing that VRF Air Conditioning System is in heats duty, and part of generating units is shut down.At different situations, the state of magnetic valve can be by following each table expression.
When VRF Air Conditioning System had two off-premises stations, the duty of magnetic valve was as follows:
| State | Off-premises station one | Off-premises station two | ||
| Magnetic valve 1 | |
Magnetic valve 1 | |
|
| Off-premises station one stops | Turn-off | Open | Open | Turn-off |
| Off-premises station two stops | Open | Turn-off | Turn-off | Open |
When VRF Air Conditioning System had three off-premises stations and a shutdown, the duty of magnetic valve was as follows:
| State | Off-premises station one | Off-premises station two | Off-premises station three | |||
| Magnetic valve | |
Magnetic valve 1 | |
Magnetic valve 1 | |
|
| Off-premises station one stops | Turn-off | Open | Open | Turn-off | Open | Turn-off |
| Off-premises station two stops | Open | Turn-off | Turn-off | Open | Open | Turn-off |
| Off-premises station three stops | Open | Turn-off | Open | Turn-off | Turn-off | Open |
When VRF Air Conditioning System had three off-premises stations and two shutdown, the duty of magnetic valve was as follows:
| State | Off-premises station one | Off-premises station two | Off-premises station three | |||
| Magnetic valve 1 | |
Magnetic valve 1 | |
Magnetic valve 1 | |
|
| Off-premises station one, two stops | Turn-off | Open | Turn-off | Open | Open | Turn-off |
| Off-premises station two, three stops | Open | Turn-off | Turn-off | Open | Turn-off | Open |
| Off-premises station one, three stops | Turn-off | Open | Open | Turn-off | Turn-off | Open |
In a word, be in the state of heating in VRF Air Conditioning System, and part of generating units is when shutting down, the magnetic valve 1 of shutting down unit turn-offs, and magnetic valve 2 is opened; The magnetic valve 1 of work unit is opened, and magnetic valve 2 cuts out; At this moment, just can set up leakage, avoid refrigerant in the accumulation of shutting down unit to the reflux circuit of shutting down the unit refrigerant.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. the device of a preventing compressor from start-up with liquid of multiple air-conditioning unit, it is characterized in that, outlet is connected by pipeline the gas-liquid separator of same unit off-premises station with outdoor heat exchanger, and this pipeline of different units reclaims to take over by gas and is connected, on the pipeline between described gas recovery adapter and the gas-liquid separator, first magnetic valve is installed; On the pipeline between described gas recovery adapter and the outdoor heat exchanger outlet, second magnetic valve is installed; When VRF Air Conditioning System heats work and part of generating units shutdown, first solenoid valve conduction of work unit, second magnetic valve turn-offs; First magnetic valve of shutting down unit turn-offs second solenoid valve conduction.
2. device according to claim 1, it is characterized in that, VRF Air Conditioning System when refrigeration, when VRF Air Conditioning System heats and all unit is all worked and VRF Air Conditioning System when all quitting work, described first magnetic valve, second magnetic valve all are in closed condition.
3. device according to claim 1 is characterized in that, the described gas that is connected at each unit reclaims on the pipeline of taking over, and corresponding to each unit gas is installed and reclaims stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101120523A CN101135487B (en) | 2006-08-29 | 2006-08-29 | Device for preventing compressor from start-up with liquid of multiple air-conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101120523A CN101135487B (en) | 2006-08-29 | 2006-08-29 | Device for preventing compressor from start-up with liquid of multiple air-conditioning unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101135487A true CN101135487A (en) | 2008-03-05 |
| CN101135487B CN101135487B (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006101120523A Expired - Fee Related CN101135487B (en) | 2006-08-29 | 2006-08-29 | Device for preventing compressor from start-up with liquid of multiple air-conditioning unit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103673397A (en) * | 2012-09-04 | 2014-03-26 | 约克广州空调冷冻设备有限公司 | Parallel-connection compressor oil way system and refrigerating unit |
| CN104748424A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Outdoor unit assembly of multiple on-line system and multiple on-line system with same |
| CN105121981A (en) * | 2013-04-12 | 2015-12-02 | 艾默生环境优化技术有限公司 | Compressor with flooded start control |
| CN108507121A (en) * | 2018-04-10 | 2018-09-07 | 宁波奥克斯电气股份有限公司 | Starting of air conditioner control method and air conditioner |
| CN110398099A (en) * | 2019-07-26 | 2019-11-01 | 广东美的暖通设备有限公司 | Heat pump system and its control method and air conditioner |
| CN112361641A (en) * | 2020-11-19 | 2021-02-12 | 南京天加环境科技有限公司 | Anti-leakage control method for refrigerant inside parallel multi-connected unit |
| CN113418328A (en) * | 2021-05-28 | 2021-09-21 | 青岛海尔空调电子有限公司 | Control method for refrigerating and freezing unit and refrigerating and freezing unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060062769A (en) * | 2004-12-06 | 2006-06-12 | 엘지전자 주식회사 | Multi airconditioning system and method for controlling the system |
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- 2006-08-29 CN CN2006101120523A patent/CN101135487B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103673397B (en) * | 2012-09-04 | 2016-04-20 | 约克广州空调冷冻设备有限公司 | Parallel-connection compressor oil way system and refrigeration unit |
| CN103673397A (en) * | 2012-09-04 | 2014-03-26 | 约克广州空调冷冻设备有限公司 | Parallel-connection compressor oil way system and refrigerating unit |
| US10519947B2 (en) | 2013-04-12 | 2019-12-31 | Emerson Climate Technologies, Inc. | Compressor with flooded start control |
| CN105121981A (en) * | 2013-04-12 | 2015-12-02 | 艾默生环境优化技术有限公司 | Compressor with flooded start control |
| US10066617B2 (en) | 2013-04-12 | 2018-09-04 | Emerson Climate Technologies, Inc. | Compressor with flooded start control |
| US10385840B2 (en) | 2013-04-12 | 2019-08-20 | Emerson Climate Technologies, Inc. | Compressor with flooded start control |
| US11067074B2 (en) | 2013-04-12 | 2021-07-20 | Emerson Climate Technologies, Inc. | Compressor with flooded start control |
| CN104748424B (en) * | 2015-03-31 | 2017-06-06 | 广东美的暖通设备有限公司 | The outdoor unit component and the multiple on-line system with it of multiple on-line system |
| CN104748424A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Outdoor unit assembly of multiple on-line system and multiple on-line system with same |
| CN108507121A (en) * | 2018-04-10 | 2018-09-07 | 宁波奥克斯电气股份有限公司 | Starting of air conditioner control method and air conditioner |
| CN108507121B (en) * | 2018-04-10 | 2020-07-31 | 宁波奥克斯电气股份有限公司 | Air conditioner starting control method and air conditioner |
| CN110398099A (en) * | 2019-07-26 | 2019-11-01 | 广东美的暖通设备有限公司 | Heat pump system and its control method and air conditioner |
| CN110398099B (en) * | 2019-07-26 | 2021-05-04 | 广东美的暖通设备有限公司 | Heat pump system, control method thereof and air conditioner |
| CN112361641A (en) * | 2020-11-19 | 2021-02-12 | 南京天加环境科技有限公司 | Anti-leakage control method for refrigerant inside parallel multi-connected unit |
| CN113418328A (en) * | 2021-05-28 | 2021-09-21 | 青岛海尔空调电子有限公司 | Control method for refrigerating and freezing unit and refrigerating and freezing unit |
Also Published As
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|---|---|
| CN101135487B (en) | 2011-05-11 |
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