CN111237856A - Control method of multi-split air conditioning system - Google Patents
Control method of multi-split air conditioning system Download PDFInfo
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- CN111237856A CN111237856A CN202010057773.9A CN202010057773A CN111237856A CN 111237856 A CN111237856 A CN 111237856A CN 202010057773 A CN202010057773 A CN 202010057773A CN 111237856 A CN111237856 A CN 111237856A
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- refrigerant
- electronic expansion
- expansion valve
- throttling element
- valve
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004378 air conditioning Methods 0.000 title claims abstract description 15
- 239000003507 refrigerant Substances 0.000 claims abstract description 88
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000005057 refrigeration Methods 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of multi-split air conditioners and aims to solve the problem that an existing multi-split air conditioner system cannot give consideration to refrigeration capacity and heating capacity and reduce refrigerant sound. The invention provides a control method of a multi-split air conditioning system, the system comprises an outdoor unit, a plurality of connected pipes and a plurality of indoor units, each connected pipe is provided with a throttling element, a switch valve and a first electronic expansion valve, the throttling element and the switch valve are arranged in parallel, the throttling element and the switch valve are arranged on the downstream side of the first electronic expansion valve along the flow direction of a refrigerant during the refrigeration of the indoor units, and the method comprises the following steps: determining the running state of the indoor unit; and selectively opening or closing the switch valve according to the running state of the indoor unit so that the first electronic expansion valve throttles the refrigerant independently, or the throttling element and the first electronic expansion valve throttle the refrigerant sequentially according to different sequences. The invention can give consideration to the problems of refrigerating and heating capacities of the indoor unit and reduction of refrigerant sound, and improves user experience.
Description
Technical Field
The invention belongs to the technical field of multi-split air conditioners, and particularly provides a control method of a multi-split air conditioner system.
Background
The multi-split air conditioning system is a device which is commonly used at present and can cool/heat the indoor space, and is widely applied to office buildings, shopping centers and the like.
When the indoor unit is in refrigeration, heating and standby heating, the refrigerant can generate sound due to the throttling function when passing through the electronic expansion valve, and the sound can cause trouble to users, especially users who are very sensitive to the sound. In the prior art, a capillary tube is generally arranged before or behind a valve of an electronic expansion valve (relative to the flow direction of a refrigerant during the refrigeration of an indoor unit), however, the capillary tube arranged before the valve of the electronic expansion valve can cause the refrigerant to be gasified during the refrigeration of the indoor unit, the dryness of the refrigerant is improved, the state of the refrigerant is unstable, and the capillary tube arranged behind the valve of the electronic expansion valve can cause the integral resistance of a heat exchanger to be increased during the heating of the indoor unit, so that the heating capacity is reduced. Therefore, the above-mentioned method of providing the capillary tube before or after the valve of the electronic expansion valve cannot achieve both of the cooling capacity and the heating capacity and reduce the refrigerant sound.
Therefore, there is a need in the art for a new control method of a multi-split air conditioning system to solve the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the existing multi-split air conditioning system cannot give consideration to the refrigeration capacity, the heating capacity and the refrigerant sound reduction, the present invention provides a control method of a multi-split air conditioning system, the multi-split air conditioning system includes an outdoor unit, a plurality of connecting pipes and a plurality of indoor units, the connecting pipes correspond to the indoor units one by one, each indoor unit is connected with the outdoor unit through one connecting pipe, each connecting pipe is provided with a throttling element, a switch valve and a first electronic expansion valve, the throttling element is connected with the switch valve in parallel, the throttling element and the switch valve are arranged on the downstream side of the first electronic expansion valve along the refrigerant flowing direction when the indoor unit is refrigerating, the control method includes: determining the running state of the indoor unit; and selectively opening or closing the switch valve according to the running state of the indoor unit so that the first electronic expansion valve throttles the refrigerant independently, or the throttling element and the first electronic expansion valve throttle the refrigerant sequentially according to different sequences.
In a preferred technical solution of the above control method, "selectively opening or closing the on-off valve according to an operation state of the indoor unit, so that the first electronic expansion valve throttles the refrigerant alone, or the throttling element and the first electronic expansion valve throttle the refrigerant sequentially in different orders" specifically includes: when the indoor unit heats, the switch valve is opened to enable the first electronic expansion valve to independently throttle the refrigerant.
In a preferred technical solution of the above control method, "selectively opening or closing the on-off valve according to an operation state of the indoor unit, so that the first electronic expansion valve throttles the refrigerant alone, or the throttling element and the first electronic expansion valve throttle the refrigerant sequentially in different orders" specifically includes: when the indoor unit is refrigerating, the switch valve is closed to enable the first electronic expansion valve and the throttling element to sequentially throttle the refrigerant.
In a preferred technical solution of the above control method, "selectively opening or closing the on-off valve according to an operation state of the indoor unit, so that the first electronic expansion valve throttles the refrigerant alone, or the throttling element and the first electronic expansion valve throttle the refrigerant sequentially in different orders" specifically includes: when the indoor unit is in a heating standby state, the switch valve is closed, so that the throttling element and the first electronic expansion valve sequentially throttle the refrigerant.
In a preferred embodiment of the above control method, the throttling element is a capillary tube.
In a preferred embodiment of the above control method, the throttling element is a second electronic expansion valve.
In a preferred embodiment of the above control method, the on-off valve is an electromagnetic valve.
As will be understood by those skilled in the art, in a preferred embodiment of the present invention, a throttling element, a switching valve and a first electronic expansion valve are provided on each connecting pipe, the throttling element is provided in parallel with the switching valve, and the throttling element and the switching valve are provided on a downstream side of the first electronic expansion valve in a refrigerant flow direction when the indoor unit performs cooling. Through the arrangement, when the indoor unit refrigerates, the switch valve on the connecting pipe corresponding to the indoor unit is closed, so that the refrigerant firstly passes through the first electronic expansion valve and then passes through the throttling element, the throttling element can reduce the front-back pressure difference of the first electronic expansion valve, the throttling sound is reduced, and the refrigerating effect of the indoor unit cannot be influenced; when the indoor unit heats, the switch valve on the connecting pipe corresponding to the indoor unit is opened, so that the refrigerant firstly passes through the first electronic expansion valve and then passes through the switch valve, namely, the refrigerant is independently throttled by the first electronic expansion valve, and the heating effect of the indoor unit is prevented from being influenced; when the indoor unit is in a heating standby state, the switch valve on the connecting pipe corresponding to the indoor unit is closed, so that the refrigerant firstly passes through the throttling element and then passes through the first electronic expansion valve, and the throttling element can reduce the front-back pressure difference of the first electronic expansion valve and reduce the throttling sound. That is to say, when the indoor unit is used for refrigerating, the throttling element and the first electronic expansion valve perform two-stage throttling, the sound of refrigerant throttling is reduced, and compared with the prior art that the capillary tube is arranged on the upstream side of the electronic expansion valve, the throttling element is arranged on the downstream side of the electronic expansion valve, so that the problem of unstable refrigerant state caused by refrigerant gasification can be avoided; when the indoor unit heats, the first electronic expansion valve performs single-stage throttling, so that the heating effect of the indoor unit can be prevented from being influenced; when the indoor unit is in a heating standby state, the throttling element and the first electronic expansion valve perform two-stage throttling, so that the throttling sound of the refrigerant is reduced. Through such control mode, can compromise the refrigeration ability of indoor set, the problem of heating ability and reduction refrigerant sound, accomplish to satisfy many-sided actual use demand of user in the at utmost, promote user experience.
Drawings
Fig. 1 is a schematic structural view of a multi-split air conditioning system according to the present invention;
fig. 2 is a flowchart illustrating a method for controlling a multi-split air conditioning system according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", etc. are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Based on the problem that the existing multi-split air conditioning system pointed out by the background technology cannot give consideration to the refrigeration capacity, the heating capacity and the refrigerant sound reduction, the invention provides a control method of the multi-split air conditioning system, which aims to give consideration to the refrigeration capacity, the heating capacity and the refrigerant sound reduction of indoor units, so that the practical use requirements of users in various aspects are met to the greatest extent, and the user experience is improved.
As shown in fig. 1, the multi-split air conditioning system of the present invention includes an outdoor unit (not shown in the figure), a plurality of connecting pipes 1 and a plurality of indoor units 2 (only one of the connecting pipes and one of the indoor units is shown in the figure), the connecting pipes 1 correspond to the indoor units 2 one to one, each indoor unit 2 is connected to the outdoor unit through one connecting pipe 1, each connecting pipe 1 is provided with a throttling element, a switching valve and a first electronic expansion valve 3, the throttling element is connected to the switching valve in parallel, and the throttling element and the switching valve are disposed on the downstream side of the first electronic expansion valve 3 along the refrigerant flowing direction when the indoor unit 2 performs refrigeration. When the indoor unit 2 refrigerates indoors, the liquid refrigerant flows from the outdoor unit to the indoor unit 2 through the connecting pipe 1, that is, when the switch valve is opened, the liquid refrigerant firstly passes through the first electronic expansion valve 3 and then passes through the switch valve, and when the switch valve is closed, the liquid refrigerant firstly passes through the first electronic expansion valve 3 and then passes through the throttling element. In the present invention, the throttling element may be the capillary tube 4, or may also be the second electronic expansion valve, or may also be another element capable of achieving a throttling function, and of course, the throttling element is most preferably the capillary tube 4, so that the cost of the throttling element is lower; the switch valve can be an electromagnetic valve 5, and of course, other valves capable of realizing the switching function can be adopted, as long as the on-off of the branch circuit can be realized through the switch valve.
The control method of the invention comprises the following steps: determining the running state of the indoor unit 2; according to the running state of the indoor unit 2, the switch valve is selectively opened or closed, so that the first electronic expansion valve 3 throttles the refrigerant alone, or the throttling element and the first electronic expansion valve 3 throttle the refrigerant in sequence according to different sequences. The throttling element and the first electronic expansion valve 3 sequentially throttle the refrigerant according to different sequences means that when the switch valve is closed and the refrigerant flows, the refrigerant first passes through one of the throttling element and the first electronic expansion valve 3, and then passes through the other of the throttling element and the first electronic expansion valve 3, for example, when the indoor unit 2 is used for refrigeration, if the switch valve is closed, the refrigerant first passes through the first electronic expansion valve 3 and then passes through the throttling element, and when the indoor unit 2 is used for heating or standby heating, if the switch valve is closed, the refrigerant first passes through the throttling element and then passes through the first electronic expansion valve 3.
Preferably, the step of selectively opening or closing the on-off valve according to the operation state of the indoor unit 2 to allow the first electronic expansion valve 3 to throttle the refrigerant alone, or allow the throttling element and the first electronic expansion valve 3 to throttle the refrigerant sequentially in different orders specifically includes: when the indoor unit 2 heats, the on-off valve is opened to allow the first electronic expansion valve 3 to throttle the refrigerant alone. When the ooff valve is opened, because ooff valve and throttling element parallel arrangement, whole refrigerant or most refrigerant can pass through from the ooff valve this moment, few refrigerant or no refrigerant pass through from throttling element, it should be noted that, when refrigerant pressure is higher, there can be a few refrigerant to pass through throttling element, but because the refrigerant volume can pass through throttling element less smoothly, throttling element can not throttle the refrigerant promptly, that is to say, only have first electronic expansion valve 3 to throttle the refrigerant this moment, thereby guarantee that indoor set 2's the effect of heating is not influenced.
Preferably, the step of selectively opening or closing the on-off valve according to the operation state of the indoor unit 2 to allow the first electronic expansion valve 3 to throttle the refrigerant alone, or allow the throttling element and the first electronic expansion valve 3 to throttle the refrigerant sequentially in different orders specifically includes: when the indoor unit 2 is refrigerating, the on-off valve is closed to make the first electronic expansion valve 3 and the throttling element successively throttle the refrigerant. When the switch valve is closed, the switch valve and the throttling element are arranged in parallel, so that the refrigerant cannot pass through the switch valve at the moment, all the refrigerant passes through the first electronic expansion valve 3 and then passes through the throttling element, the two-stage throttling is performed on the refrigerant, the front-back pressure difference of the first electronic expansion valve 3 is reduced, and the throttling sound of the refrigerant is reduced.
Preferably, the step of selectively opening or closing the on-off valve according to the operation state of the indoor unit 2 to allow the first electronic expansion valve 3 to throttle the refrigerant alone, or allow the throttling element and the first electronic expansion valve 3 to throttle the refrigerant sequentially in different orders specifically includes: when the indoor unit 2 is in a standby state for heating, the switching valve is closed so that the throttling element and the first electronic expansion valve 3 sequentially throttle the refrigerant. When the switch valve is closed, the switch valve and the throttling element are arranged in parallel, at the moment, the refrigerant cannot pass through the switch valve, all the refrigerant firstly passes through the throttling element and then passes through the first electronic expansion valve 3, so that the two-stage throttling is performed on the refrigerant, the front-back pressure difference of the first electronic expansion valve 3 is reduced, and the throttling sound of the refrigerant is reduced.
The most preferred embodiment of the invention is illustrated below with reference to a specific example. Wherein, the throttling element is a capillary tube 4, and the switch valve is an electromagnetic valve 5.
As shown in fig. 2, the control method of the present invention includes:
s1: confirming the operation state of the indoor unit 2;
s2: if the running state of the indoor unit 2 is a refrigerating state, the electromagnetic valve 5 is closed to enable the first electronic expansion valve 3 and the capillary tube 4 to successively throttle the refrigerant;
s3: if the running state of the indoor unit 2 is the heating state, the electromagnetic valve 5 is opened to enable the first electronic expansion valve 3 to independently throttle the refrigerant;
s4: if the operation state of the indoor unit 2 is the heating standby state, the electromagnetic valve 5 is closed to make the capillary tube 4 and the first electronic expansion valve 3 successively throttle the refrigerant.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (7)
1. A control method of a multi-split air conditioning system is characterized in that the multi-split air conditioning system comprises an outdoor unit, a plurality of connecting pipes and a plurality of indoor units, the connecting pipes correspond to the indoor units one by one, each indoor unit is connected with the outdoor unit through one connecting pipe,
each connecting pipe is provided with a throttling element, a switch valve and a first electronic expansion valve, the throttling element is connected with the switch valve in parallel, the throttling element and the switch valve are arranged on the downstream side of the first electronic expansion valve along the flowing direction of a refrigerant during refrigeration of the indoor unit,
the control method comprises the following steps:
determining the running state of the indoor unit;
and selectively opening or closing the switch valve according to the running state of the indoor unit so that the first electronic expansion valve throttles the refrigerant independently, or the throttling element and the first electronic expansion valve sequentially throttle the refrigerant according to different sequences.
2. The control method according to claim 1, wherein the step of selectively opening or closing the on-off valve according to the operation state of the indoor unit so that the first electronic expansion valve throttles the refrigerant alone, or so that the throttling element and the first electronic expansion valve throttle the refrigerant sequentially in different orders specifically comprises:
when the indoor unit heats, the switch valve is opened to enable the first electronic expansion valve to independently throttle the refrigerant.
3. The control method according to claim 1, wherein the step of selectively opening or closing the on-off valve according to the operation state of the indoor unit so that the first electronic expansion valve throttles the refrigerant alone, or so that the throttling element and the first electronic expansion valve throttle the refrigerant sequentially in different orders specifically comprises:
when the indoor unit refrigerates, the switch valve is closed, so that the first electronic expansion valve and the throttling element sequentially throttle the refrigerant.
4. The control method according to claim 1, wherein the step of selectively opening or closing the on-off valve according to the operation state of the indoor unit so that the first electronic expansion valve throttles the refrigerant alone, or so that the throttling element and the first electronic expansion valve throttle the refrigerant sequentially in different orders specifically comprises:
when the indoor unit is in a heating standby state, the switch valve is closed, so that the throttling element and the first electronic expansion valve sequentially throttle the refrigerant.
5. The control method of claim 1, wherein the throttling element is a capillary tube.
6. The control method of claim 1, wherein the throttling element is a second electronic expansion valve.
7. The control method according to any one of claims 1 to 6, characterized in that the on-off valve is a solenoid valve.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010057773.9A CN111237856A (en) | 2020-01-19 | 2020-01-19 | Control method of multi-split air conditioning system |
| PCT/CN2021/071636 WO2021143744A1 (en) | 2020-01-19 | 2021-01-14 | Method for controlling multi-split air-conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010057773.9A CN111237856A (en) | 2020-01-19 | 2020-01-19 | Control method of multi-split air conditioning system |
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| CN111237856A true CN111237856A (en) | 2020-06-05 |
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| CN202010057773.9A Pending CN111237856A (en) | 2020-01-19 | 2020-01-19 | Control method of multi-split air conditioning system |
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| CN (1) | CN111237856A (en) |
| WO (1) | WO2021143744A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021143744A1 (en) * | 2020-01-19 | 2021-07-22 | 青岛海尔空调电子有限公司 | Method for controlling multi-split air-conditioning system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367363A (en) * | 2002-03-13 | 2002-09-04 | 顾雏军 | Cold-warm air conditioner |
| CN101986051A (en) * | 2010-11-17 | 2011-03-16 | 海尔集团公司 | Frequency conversion air-conditioner and method for controlling refrigerant flow in frequency conversion air-conditioner |
| CN204806610U (en) * | 2015-07-30 | 2015-11-25 | 广东美的制冷设备有限公司 | Exhaust temperature controlling means and air conditioning system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100757442B1 (en) * | 2005-12-29 | 2007-09-11 | 엘지전자 주식회사 | Air conditioner |
| CN202973381U (en) * | 2012-12-24 | 2013-06-05 | 海信（山东）空调有限公司 | Air conditioner external unit and air conditioner |
| CN104456739B (en) * | 2014-12-26 | 2017-03-01 | 珠海格力电器股份有限公司 | Air conditioning system and control method |
| CN106288549A (en) * | 2016-09-18 | 2017-01-04 | 华南理工大学 | A kind of reducer adapting to cryogenic quick freezing and method and application |
| CN209310268U (en) * | 2018-11-29 | 2019-08-27 | 浙江中广电器股份有限公司 | CO2Teat pump boiler throttling set |
| CN111237856A (en) * | 2020-01-19 | 2020-06-05 | 青岛海尔空调电子有限公司 | Control method of multi-split air conditioning system |
-
2020
- 2020-01-19 CN CN202010057773.9A patent/CN111237856A/en active Pending
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- 2021-01-14 WO PCT/CN2021/071636 patent/WO2021143744A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367363A (en) * | 2002-03-13 | 2002-09-04 | 顾雏军 | Cold-warm air conditioner |
| CN101986051A (en) * | 2010-11-17 | 2011-03-16 | 海尔集团公司 | Frequency conversion air-conditioner and method for controlling refrigerant flow in frequency conversion air-conditioner |
| CN204806610U (en) * | 2015-07-30 | 2015-11-25 | 广东美的制冷设备有限公司 | Exhaust temperature controlling means and air conditioning system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021143744A1 (en) * | 2020-01-19 | 2021-07-22 | 青岛海尔空调电子有限公司 | Method for controlling multi-split air-conditioning system |
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| WO2021143744A1 (en) | 2021-07-22 |
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Effective date of registration: 20221123 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Applicant before: Haier Smart Home Co., Ltd. |
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