CN103398446B - A kind of method improving air-conditioning heating refrigeration - Google Patents
A kind of method improving air-conditioning heating refrigeration Download PDFInfo
- Publication number
- CN103398446B CN103398446B CN201310289892.7A CN201310289892A CN103398446B CN 103398446 B CN103398446 B CN 103398446B CN 201310289892 A CN201310289892 A CN 201310289892A CN 103398446 B CN103398446 B CN 103398446B
- Authority
- CN
- China
- Prior art keywords
- expansion valve
- temperature
- aperture
- electric expansion
- difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention provides a kind of method improving air-conditioning heating refrigeration, the method is by detecting the relation of cold medium flux value and indoor temperature and coil temperature, regulate the aperture of electric expansion valve thus draw the optimal refrigerant flow of each indoor set, also there will not be the mistake when evaporating temperature has larger change to regulate, the concrete flow of each indoor set can also be known simultaneously.Cold medium flux due to respective chambers machine is best state, therefore it is comparatively energy-conservation, and cooling or heating effect is also better.
Description
Technical field
The present invention relates to a kind of method improving air-conditioning heating refrigeration, particularly a kind of method improving the air-conditioning system of the cooling and warming of many indoor units.
Background technology
Air-conditioning has become a part for people's life as refrigeration or heating equipment, improve the comfortableness of people's life, but the refrigerant inside air-conditioning is certain, if there is bias current or gathering when flowing, to more electric energy be expended, and desirable effect can not be reached.
At present, the multi-gang air-conditioner on market, when cooling and warming, for preventing refrigerant bias current, have employed new technical scheme, so just can improve the cooling or heating effect of system.
As the patent No. is: CN201110255060.4, patent name: the control method of preventing bias flow of refrigerants during heating of multi-connected air conditioning unit, this disclosure of the invention is known clearly a kind of control method of preventing bias flow of refrigerants during heating of multi-connected air conditioning unit, it realizes key step: measure the temperature T0 in the middle part of indoor heat exchanger, the indoor-unit cooling-medium that T0 is the highest is maximum, and the indoor-unit cooling-medium that T0 is minimum is minimum; Measure the outlet temperature T1min of the indoor heat exchanger of the minimum indoor set of refrigerant, measure the outlet temperature T1max of the indoor heat exchanger of the maximum indoor set of refrigerant, both calculations difference △ T; Judge whether △ T is more than or equal to 5, is, then the aperture of organic electronic expansion valve (4) in indoor set minimum for refrigerant is increased, the aperture of organic electronic expansion valve in indoor sets maximum for refrigerant is reduced; At set intervals, repeat above-mentioned steps, until shut down.
As the patent No. is: CN201110255066.1, patent name: the control method preventing refrigerant bias current during VRF Air Conditioning System refrigeration, prevent the control method of refrigerant bias current during a kind of VRF Air Conditioning System refrigeration of this disclosure of the invention, its concrete methods of realizing is as follows: a, the start of the compressor of off-premises station is run a period of time; B, by the temperature T0 in the middle part of the indoor heat exchanger of each indoor set of temperature sensor measurement in the middle part of the indoor heat exchanger of each indoor set, temperature-measuring results is sent to air-conditioning master controller, the indoor set that temperature T0 in the middle part of indoor heat exchanger is the highest is the minimum indoor set of refrigerant, and the indoor set that the temperature T0 in the middle part of indoor heat exchanger is minimum is the indoor set that refrigerant is maximum; C, temperature T1min by the outlet of the indoor heat exchanger of this indoor set of temperature sensor measurement of the outlet of the indoor heat exchanger of the minimum indoor set of refrigerant, by the temperature T1max of the outlet of the indoor heat exchanger of this indoor set of temperature sensor measurement of the outlet of the indoor heat exchanger of the maximum indoor set of refrigerant, above-mentioned two temperature values are passed to air-conditioning master controller, and calculates the difference △ T that T1min deducts T1max; D, judge whether △ T is more than or equal to 5, if so, then the aperture of organic electronic expansion valve in indoor set minimum for refrigerant is increased, the aperture of organic electronic expansion valve in indoor sets maximum for refrigerant is reduced simultaneously; If not, then do not regulate; E, at interval of a period of time, repeat above-mentioned steps, until shut down.
Above-mentioned technical scheme is all after directly the amount that temperature sensor detects being carried out simple process, as input variable, after the process of MCU, as output controlled quentity controlled variable, for controlling the aperture of electric expansion valve, thus prevent refrigerant bias current, thus improve the comfort level of air-conditioning.Time but this kind of control method also easily occurs that mistake regulates, this kind of control method just can not use normally sometimes, causes the indoor set had in multiple on-line system not reach due effect.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method improving air-conditioning heating refrigeration, the method is by detecting the relation of cold medium flux value and indoor temperature and coil temperature, regulate the aperture of electric expansion valve thus draw the optimal refrigerant flow of each indoor set, also there will not be the mistake when evaporating temperature has larger change to regulate, the concrete flow of each indoor set can also be known simultaneously.Cold medium flux due to respective chambers machine is best state, therefore it is comparatively energy-conservation, and cooling or heating effect is also better.
The technical solution used in the present invention is as follows: a kind of method improving air-conditioning heating refrigeration, is characterized in that:
Cold medium flux value QL, indoor temperature TS after A, timing detected electrons expansion valve and coil pipe evaporating temperature TZ also calculate the difference QL1-QL2 of the first moment cold medium flux value QL1 and the second moment cold medium flux value QL2, calculate the difference TS0-TS1 of the first moment indoor temperature TS0 and the second moment indoor temperature TS1, calculate the difference TZ0-TZ1 of the first moment coil pipe evaporating temperature TZ0 and the second moment coil pipe evaporating temperature TZ1;
If the absolute difference of B TS0-TS1 diminishes, and is more than or equal to zero, and the difference of the design temperature of indoor temperature TS and user is in setting range, thus performs step C;
The aperture of C, reduction electric expansion valve, makes the difference of QL1-QL2 be more than or equal to zero;
If the absolute difference of D now TZ0-TZ1 in setting range, then performs step e;
E, reduce the aperture of its electric expansion valve, until the absolute difference of TZ0-TZ1 is more than or equal to set temperature range;
F, in setting-up time, keep the aperture of electric expansion valve constant, during this period, if the absolute difference of TZ0-TZ1 in the temperature range of setting, then performs step G;
The aperture of G, maintenance electric expansion valve now.
As preferably, the monitoring method of described cold medium flux value QL is, adopts flowmeter to measure.
As preferably, the detection method of described cold medium flux value QL is, the aperture of detected electrons expansion valve, according to the aperture of electric expansion valve and the relation of cold medium flux, converses the flow value of refrigerant.
As preferably, draw functional relation between QL and indoor temperature change generated in case value TS0-TS1 and coil temperature changing value TZ0-TZ1 and change direction according to experiment, as control according to input performance element for regulating the aperture of electric expansion valve.
As preferably, if do not meet the Rule of judgment of described step B, then strengthen the aperture of electric expansion valve, continue to judge, until the Rule of judgment meeting step B performs step C again.
As preferably, if do not meet the Rule of judgment of described step D, then strengthen the aperture of electric expansion valve, continue to judge, until the Rule of judgment meeting step D performs step e again.
As preferably, each to reduce or strengthen the aperture that electric expansion valve changes be 10%.
As preferably, if do not meet the Rule of judgment of described step e, then strengthen the aperture of electric expansion valve 5%, continue to judge, until the Rule of judgment meeting step e performs step F again.
Compared with prior art, the invention has the beneficial effects as follows:
For the system that multiple indoor set runs, when one or more indoor set opened by needs, first the control system of this air-conditioning detects this original ambient temperature residing for respective chambers machine, and is saved in RAM or ROM of system by this value, for calling later; Detect the design temperature of user, see its temperature range in the standard of air-conditioning system.
When cooling in summer, room temperature is essentially about 30 degree, if need the design temperature of 20 degree, just need lower evaporating temperature, or many refrigerants are to take away more indoor heat, now indoor coil pipe will lower than 20 degree, and as being about 10 degree, indoor environment temperature is just in time 20 degree.Because pipeline has certain length, the refrigerant temperature of evaporator outlet, just higher than 10 degree, during to suction port of compressor, may may be about 15 degree, at this moment just have the degree of superheat of about 5 degree.
When room temperature rises, if reach about 32 degree, if also need the design temperature of 20 degree, now need lower evaporating temperature or more refrigerant to take away more indoor heat as required.Now indoor coil pipe will lower than 10 degree, as being about 8 degree, indoor environment temperature just in time time 20 degree.Assuming that evaporating temperature is 8 degree, because pipeline has certain length, the refrigerant temperature of evaporator outlet, just higher than 8 degree, during to suction port of compressor, may may be about 15 degree, at this moment just have the degree of superheat higher than 5 degree.
When room temperature reaches about 28 degree, if also need the design temperature of 20 degree, now need slightly higher evaporating temperature or less refrigerant to take away relatively more less slightly indoor heat as required.Now indoor coil pipe still will lower than 20 degree, as being about 12 degree, indoor environment temperature just in time time 20 degree.Assuming that evaporating temperature is 8 degree, because pipeline has certain length, the refrigerant temperature of evaporator outlet, just higher than 12 degree, during to suction port of compressor, may may be about 15 degree, at this moment just have the degree of superheat less than 5 degree.
Visible for single air-conditioning system refrigeration, when indoor environment temperature changes, when evaporating temperature is constant, be 8 degree, the degree of superheat will change, and namely the suction temperature of compressor will change, when the suction temperature height of compressor, its delivery temperature also can be high, and now condensation temperature will be high.But to multiple on-line system, because the environment temperature of each indoor set is different, some height, what have is low, certainly has difference, and as in the shade room temperature will be low, the room temperature faced south will be high.In addition, the length of its pipeline is different, and the degree of superheat also can be caused also very different.If the middle portion temperature of pure indoor evaporator, average indoor temperature or indoor temperature control, and do not consider the length of pipeline, and namely the degree of superheat controls, and will inevitably cause the waste of the energy, or even out of control.If certain room is 35 degree, another one room is 28 degree, and pipeline also different length, all will arrive the design temperature of 20 degree, its evaporating temperature is roughly the same is about 8 degree, but not etc., evaporating temperature as 35 degree of rooms is 7 degree, and the evaporating temperature in 28 degree of rooms is 9 degree.Due to the sample different in size of pipeline, its degree of superheat will be different, if one is 6 degree, one is 4 degree, and temperature when arriving compressor is like this same, is all 13 degree, after compressor compresses, becomes again the same HTHP cold media gas.Because condensation temperature is the same, evaporating temperature is different, and the degree of superheat is different, and its efficiency will be different, and efficiency just has very large difference.According to the technical scheme that background technology provides, evaporating temperature is that the cold medium flux in the indoor set of 7 degree is more, needs to reduce; Evaporating temperature is that the refrigerant of the indoor set of 9 degree is less, and needing increases.But the initial temperature in the room that these two indoor sets are residing is respectively different, differ 4 degree, refrigerating capacity required for them meets the demands, if now ignore objective condition and adjust flow by force, will cause energy waste and occur can not meet the actual needs of client.
The method applied in the present invention, more adequately can judge the optimum flow of each indoor-unit cooling-medium, also there will not be the mistake when evaporating temperature has larger change to regulate, can also know the concrete flow of each indoor set simultaneously.Cold medium flux due to respective chambers machine is best state, therefore it is comparatively energy-conservation, and cooling or heating effect is also better.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
All features disclosed in this description, except the feature got rid of mutually, all can combine by any way.
Arbitrary feature disclosed in this description (comprising any accessory claim, summary), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Be specifically described when this specific embodiment is to freeze.
Improve a method for air-conditioning heating refrigeration, its concrete grammar step is:
Cold medium flux value QL, indoor temperature TS after A, timing detected electrons expansion valve and coil pipe evaporating temperature TZ also calculate the difference QL1-QL2 of the first moment cold medium flux value QL1 and the second moment cold medium flux value QL2, calculate the difference TS0-TS1 of the first moment indoor temperature TS0 and the second moment indoor temperature TS1, calculate the difference TZ0-TZ1 of the first moment coil pipe evaporating temperature TZ0 and the second moment coil pipe evaporating temperature TZ1;
If the absolute difference of B TS0-TS1 diminishes, and is more than or equal to zero, and the difference of the design temperature of indoor temperature TS and user is in setting range, then the refrigerant of known now indoor set meets the demand of user, thus performs step C;
The aperture of C, reduction electric expansion valve, makes the difference of QL1-QL2 be more than or equal to zero;
If the absolute difference of D now TZ0-TZ1 is in setting range (setting range is determined according to actual condition situation demand), then the refrigerant of this indoor set known is many;
E, reduce the aperture of its electric expansion valve, until the absolute difference of TZ0-TZ1 is more than or equal to set temperature range;
F, in setting-up time, keep the aperture of electric expansion valve constant, during this period, if the absolute difference of TZ0-TZ1 is in the temperature range of setting, the aperture of known electric expansion valve is now best;
The aperture of G, maintenance electric expansion valve now.
The above-mentioned periodic detection time difference can be set as 1 minute, 10 minutes, 30 minutes, 60 minutes, determines according to actual condition situation demand.
The monitoring method of described cold medium flux value QL is, adopts flowmeter to measure.
The detection method of described cold medium flux value QL is, the aperture of detected electrons expansion valve, according to the aperture of electric expansion valve and the relation of cold medium flux, converses the flow value of refrigerant.
If do not meet the Rule of judgment of described step B, then strengthen the aperture of electric expansion valve, continue to judge, until the Rule of judgment meeting step B performs step C again.
If do not meet the Rule of judgment of described step D, then strengthen the aperture of electric expansion valve, continue to judge, until the Rule of judgment meeting step D performs step e again.
In above-mentioned steps, the aperture that each reduction or increasing electric expansion valve change is 10%.
The aperture excursion of each electric expansion valve is 10%, both can realize the demand of user and energy-conservation object comparatively rapidly, can avoid because adjustable range is excessive toning again.
If do not meet the Rule of judgment of described step e, then strengthen the aperture of electric expansion valve 5%, continue to judge, until the Rule of judgment meeting step e performs step F again.
Draw functional relation between QL and indoor temperature change generated in case value TS0-TS1 and coil temperature changing value TZ0-TZ1 and change direction according to experiment, as control according to input performance element for regulating the aperture of electric expansion valve.
The aperture of periodic detection electric expansion valve, coil pipe evaporation initial temperature TZ0 and real-time coil pipe evaporating temperature TZ1 calculates (1 minute a period of time, 10 minutes, 30 minutes, 60 minutes) according to the aperture of electromagnetic expanding valve and condensing temperature value, calculate the actual flow QL of the refrigerant of respective chambers machine, and the temperature change value TS0-TS1 of indoor, the changing value of coil pipe evaporating temperature TZ0-TZ1, finds out the functional relation of QL and said temperature changing value and the direction of change simultaneously.
According to air-conditioning in the market, its evaporating temperature known can change in certain temperature range, but the limited extent of variation, general for domestic air conditioning, between-25 degree to+25 degree, if there is no other variable as a reference, only rely on evaporating temperature as judging that the foundation of refrigerant whether bias current will cause the adjustment of many mistakes.
Based on this, embodiments of the invention, have employed flowermeter, the concrete flow measuring each indoor set that so just can be real-time; Certainly, also can not add up the concrete flow of the refrigerant of each indoor set by use traffic meter, and use the aperture of electromagnetic expanding valve and the corresponding relation of flow, calculate the flow QL of refrigerant.
Each indoor set for multiple on-line system can use above-mentioned apparatus and method, sets out best cold medium flux.This aircondition or multiple on-line system also comprise the judgment means of optimal refrigerant flow, and it has input block and performance element, and performance element is for regulating the aperture of electric expansion valve.
During heating operation, the direction of the flowing of refrigerant is contrary, also can adopt above-mentioned method setting optimum flow.
Claims (8)
1. improve a method for air-conditioning heating refrigeration, it is characterized in that:
Cold medium flux value QL, indoor temperature TS after A, timing detected electrons expansion valve and coil pipe evaporating temperature TZ also calculate the difference QL1-QL2 of the first moment cold medium flux value QL1 and the second moment cold medium flux value QL2, calculate the difference TS0-TS1 of the first moment indoor temperature TS0 and the second moment indoor temperature TS1, calculate the difference TZ0-TZ1 of the first moment coil pipe evaporating temperature TZ0 and the second moment coil pipe evaporating temperature TZ1;
If the absolute difference of B TS0-TS1 diminishes, and is more than or equal to zero, and the difference of the design temperature of indoor temperature TS and user is in setting range, thus performs step C;
The aperture of C, reduction electric expansion valve, makes the difference of QL1-QL2 be more than or equal to zero;
If the absolute difference of D now TZ0-TZ1 in setting range, then performs step e;
E, reduce the aperture of its electric expansion valve, until the absolute difference of TZ0-TZ1 is more than or equal to set temperature range;
F, in setting-up time, keep the aperture of electric expansion valve constant, during this period, if the absolute difference of TZ0-TZ1 in the temperature range of setting, then performs step G;
The aperture of G, maintenance electric expansion valve now.
2. method according to claim 1, is characterized in that: the monitoring method of described cold medium flux value QL is, adopts flowmeter to measure.
3. method according to claim 1, is characterized in that: the detection method of described cold medium flux value QL is, the aperture of detected electrons expansion valve, according to the aperture of electric expansion valve and the relation of cold medium flux, converses the flow value of refrigerant.
4. method according to claim 1, it is characterized in that: draw functional relation between QL and indoor temperature change generated in case value TS0-TS1 and coil temperature changing value TZ0-TZ1 and change direction according to experiment, as control according to input performance element for regulating the aperture of electric expansion valve.
5. method according to claim 1, is characterized in that: if do not meet the Rule of judgment of described step B, then strengthen the aperture of electric expansion valve, continues to judge, until the Rule of judgment meeting step B performs step C again.
6. method according to claim 1, is characterized in that: if do not meet the Rule of judgment of described step D, then strengthen the aperture of electric expansion valve, continues to judge, until the Rule of judgment meeting step D performs step e again.
7. according to the method one of claim 1 to 6 Suo Shu, it is characterized in that: the aperture that each reduction or increasing electric expansion valve change is 10%.
8. method according to claim 7, is characterized in that: if do not meet the Rule of judgment of described step e, then strengthen the aperture of electric expansion valve 5%, continues to judge, until the Rule of judgment meeting step e performs step F again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310289892.7A CN103398446B (en) | 2013-07-11 | 2013-07-11 | A kind of method improving air-conditioning heating refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310289892.7A CN103398446B (en) | 2013-07-11 | 2013-07-11 | A kind of method improving air-conditioning heating refrigeration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103398446A CN103398446A (en) | 2013-11-20 |
| CN103398446B true CN103398446B (en) | 2015-09-30 |
Family
ID=49562125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310289892.7A Active CN103398446B (en) | 2013-07-11 | 2013-07-11 | A kind of method improving air-conditioning heating refrigeration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103398446B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106403044B (en) * | 2016-11-03 | 2019-05-31 | 广东美的暖通设备有限公司 | The determination method of multi-line system and its indoor unit heating capacity |
| CN107101323A (en) * | 2017-04-13 | 2017-08-29 | 青岛海尔空调电子有限公司 | The coolant quantity detection method and device of air conditioner |
| CN108759008B (en) * | 2018-06-12 | 2020-09-04 | 广东美的暖通设备有限公司 | Control method and device of air conditioner and air conditioner with control device |
| CN111271848B (en) * | 2019-07-17 | 2021-07-06 | 宁波奥克斯电气股份有限公司 | Control method of air conditioner and air conditioner thereof |
| CN112710064B (en) * | 2019-10-24 | 2022-09-27 | 广东美的制冷设备有限公司 | Multi-split air conditioner, control method thereof and computer readable storage medium |
| CN110986333B (en) * | 2019-12-26 | 2021-12-21 | 广东美的制冷设备有限公司 | Control method and device of air conditioner, air conditioner and electronic equipment |
| CN111780369B (en) * | 2020-06-30 | 2022-01-21 | 青岛海尔空调器有限总公司 | Method and device for high-temperature sterilization control of air conditioner and air conditioner |
| CN112797599B (en) * | 2020-12-30 | 2022-08-16 | 宁波奥克斯电气股份有限公司 | Multi-split air conditioner electronic expansion valve opening control method, adjusting device and air conditioner system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264024A (en) * | 1999-02-03 | 2000-08-23 | 三洋电机株式会社 | Air conditioner |
| CN1724952A (en) * | 2004-07-21 | 2006-01-25 | 松下电器产业株式会社 | Air-conditioner |
| WO2009011197A1 (en) * | 2007-07-18 | 2009-01-22 | Mitsubishi Electric Corporation | Refrigerating cycle device and method for controlling operation of the same |
-
2013
- 2013-07-11 CN CN201310289892.7A patent/CN103398446B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264024A (en) * | 1999-02-03 | 2000-08-23 | 三洋电机株式会社 | Air conditioner |
| CN1724952A (en) * | 2004-07-21 | 2006-01-25 | 松下电器产业株式会社 | Air-conditioner |
| WO2009011197A1 (en) * | 2007-07-18 | 2009-01-22 | Mitsubishi Electric Corporation | Refrigerating cycle device and method for controlling operation of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103398446A (en) | 2013-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103398446B (en) | A kind of method improving air-conditioning heating refrigeration | |
| CN103162385B (en) | A kind of device and method adjusting electronic expansion valve of refrigeration equipment | |
| CN108224702B (en) | Control method and device for central air-conditioning system | |
| CN102901293B (en) | The air-conditioner of fine adjustment electric expansion valve and control method thereof | |
| US9995517B2 (en) | Operation control apparatus of air-conditioning apparatus and air-conditioning apparatus comprising same | |
| US9562701B2 (en) | Temperature control system and air conditioning system | |
| CN110671777B (en) | Control method and device of air conditioner and air conditioner | |
| CN106895541B (en) | A kind of energy-saving control method under air conditioner refrigeration mode based on users'comfort | |
| CN105674489B (en) | A kind of optimal control method and system of water pump of central air conditioner | |
| CN203533802U (en) | Air-conditioning system | |
| CN102278804B (en) | Control method for preventing bias flow of refrigerants during heating of multi-connected air conditioning unit | |
| CN104913445B (en) | Control method, the control system of blower fan gear and the air conditioner of blower fan gear | |
| CN105318491B (en) | The control method and device of air conditioner | |
| CA2885755A1 (en) | Variable refrigerant charge control | |
| CN103528188B (en) | air source hot water machine system and control method thereof | |
| CN107477798B (en) | method and device for controlling refrigerant of air conditioner and air conditioner | |
| CN108603709B (en) | Method for controlling a fan of a vapour compression system according to a variable temperature set point | |
| CN107388499A (en) | A kind of domestic air conditioning defrosting control method | |
| CN107642879B (en) | Control method and device of air conditioning system and air conditioner | |
| JP6681896B2 (en) | Refrigeration system | |
| CN102401524A (en) | Control method of electronic expansion valve when convertible frequency airconditioner runs in manner of refrigeration | |
| CN105371403A (en) | Variable-frequency air cooled air conditioning unit and control method | |
| WO2016141791A1 (en) | Hybrid-power refrigerating system and control method thereof | |
| JP6072424B2 (en) | Air conditioner | |
| US20190249894A1 (en) | A dc varaiable speed compressor control method and control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |