CN113375235A - Multi-pipe system multi-split air conditioner outdoor unit - Google Patents
Multi-pipe system multi-split air conditioner outdoor unit Download PDFInfo
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- CN113375235A CN113375235A CN202110759668.4A CN202110759668A CN113375235A CN 113375235 A CN113375235 A CN 113375235A CN 202110759668 A CN202110759668 A CN 202110759668A CN 113375235 A CN113375235 A CN 113375235A
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- outdoor unit
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- 239000003507 refrigerant Substances 0.000 claims abstract description 81
- 239000007788 liquid Substances 0.000 claims description 23
- 230000005494 condensation Effects 0.000 abstract description 11
- 238000009833 condensation Methods 0.000 abstract description 11
- 238000005057 refrigeration Methods 0.000 abstract description 11
- 238000004378 air conditioning Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007787 solid Substances 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
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Combustion & Propulsion (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a multi-pipe system multi-split air conditioner outdoor unit, wherein a refrigerant air outlet of a compressor of an operation outdoor unit module is divided into two paths, one path is communicated and connected with a refrigerant inlet of a first electronic expansion valve of the operation outdoor unit module, and the other path is communicated and connected with a refrigerant inlet of a second electronic expansion valve of the operation outdoor unit module; the running outdoor unit module is connected with a condenser of the running outdoor unit module through a first electronic expansion valve; the running outdoor unit module is connected with a condenser of the non-running outdoor unit module through a second electronic expansion valve, a second electronic expansion valve of the non-running outdoor unit module and a first electronic expansion valve; the condensers are connected with the indoor machine side, the indoor machine side is connected with an indoor machine heat exchanger, and the indoor machine heat exchanger is connected with a compressor for operating an outdoor machine module; the condenser heat exchange area of the non-operating outdoor unit module is fully utilized, the condensation heat exchange efficiency is improved, the condensation temperature of the refrigeration cycle is reduced, and the operation energy efficiency of the multi-split air-conditioning system under partial load is improved.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a multi-pipe multi-split air conditioner outdoor unit.
Background
With the improvement of living standard of people, the requirements of people on indoor environment are higher and higher. Air conditioners are widely used. The multi-split air conditioner is widely applied due to simple and flexible use, and accounts for more than 50% of the market capacity of the central air conditioner. Therefore, technical means are needed to further improve the energy efficiency of the multi-split air-conditioning system and reduce the energy consumption of the multi-split air-conditioning system. According to the refrigeration cycle principle, under the condition that other conditions are not changed, the condensation temperature of the refrigeration cycle is reduced, and the refrigeration cycle efficiency can be improved; meanwhile, according to the existing practical experience, the building is in a partial load state in most of the time, and the type selection of the air conditioning system is generally configured according to the maximum load of the building, so that the air conditioning system is operated in the partial load state in most of the time. For the multi-split air conditioning system, since the outdoor unit is composed of a plurality of modules, only some outdoor unit modules are operated and other outdoor unit modules are not operated in most of the time. According to the knowledge of heat transfer science, the increase of the heat exchange area is a measure for improving the heat exchange capacity, so that the heat exchange area of the condenser of the outdoor unit module which is not operated can not be recycled and the condensation heat exchange efficiency can not be improved under the condition of partial load.
Disclosure of Invention
The invention provides a multi-pipe multi-split air conditioner outdoor unit, which aims to solve the problems that the heat exchange area of a condenser of an outdoor unit module which does not operate cannot be recycled and the condensation heat exchange efficiency cannot be improved when the outdoor unit module in the prior art is in partial load.
The invention specifically comprises the following scheme:
the invention provides a multi-pipe multi-split air conditioner outdoor unit which comprises an operating outdoor unit module and a non-operating outdoor unit module, wherein the operating outdoor unit module and the non-operating outdoor unit module respectively comprise a compressor, a first electronic expansion valve, a second electronic expansion valve and a condenser; the refrigerant gas outlet of the compressor of the running outdoor unit module is divided into two paths, wherein one path is communicated and connected with the refrigerant inlet of the first electronic expansion valve of the running outdoor unit module, and the other path is communicated and connected with the refrigerant inlet of the second electronic expansion valve of the running outdoor unit module; a refrigerant outlet of a first electronic expansion valve of the running outdoor unit module is communicated and connected with a refrigerant inlet of a condenser of the running outdoor unit module; a refrigerant outlet of a second electronic expansion valve of the running outdoor unit module is respectively communicated and connected with a refrigerant inlet of a condenser of the non-running outdoor unit module through the second electronic expansion valve and the first electronic expansion valve of the non-running outdoor unit module; the condenser of the running outdoor unit module and the refrigerant outlet of the condenser of the non-running outdoor unit module are both communicated and connected with the refrigerant inlet of the indoor unit side, the refrigerant outlet of the indoor unit side is communicated and connected with the refrigerant inlet of the indoor unit heat exchanger, and the refrigerant outlet of the indoor unit heat exchanger is communicated and connected with the refrigerant inlet of the compressor of the running outdoor unit module.
The number of the running outdoor unit modules is at least two. The number of the non-operating outdoor unit modules is at least two.
When a building is in partial load, only the operating outdoor unit module is in an operating state, other non-operating outdoor unit modules are in a standby state, and the compressors of the non-operating outdoor unit modules in the standby state are not operated. The flow paths of the refrigerant at this time are: the high-temperature and high-pressure gas discharged by the compressor of the outdoor unit module is divided into two paths. One path of the heat is condensed and released in a condenser through a first electronic expansion valve, and the electronic expansion valve plays a role in regulating flow; and the other path of the refrigerant enters the non-operating outdoor unit module in the standby state through the second electronic expansion valve, then flows through the second electronic expansion valve and the first electronic expansion valve of the non-operating outdoor unit module in the standby state, then enters the condenser of the non-operating outdoor unit module in the standby state, and is condensed to release heat in the condenser of the non-operating outdoor unit module in the standby state. After condensation and heat release in all condensers of the operating outdoor unit module and the non-operating outdoor unit module, the heat is uniformly sent to the indoor unit side, is throttled and cooled, and is evaporated and absorbed in the indoor unit heat exchanger and then returns to the compressor of the operating outdoor unit module. In the process, only the compressor of the outdoor unit module is operated, and the heat exchange area of the condenser is the area of all the condensers of the outdoor unit module and the non-outdoor unit module; thereby reducing the condensation temperature and improving the efficiency of the refrigeration cycle.
It should be noted that although the compressor of the non-operating outdoor unit module is not operated, the outdoor unit fan of the non-operating outdoor unit module is operated.
Preferably, the open states or valve opening ratios of the first and second electronic expansion valves of the non-operating outdoor unit module are controlled such that the outdoor unit fan corresponding to the non-operating outdoor unit module is in an operating state when only the first and second electronic expansion valves of the non-operating outdoor unit module are in the open states.
Furthermore, a refrigerant gas outlet of the compressor of the running outdoor unit module is divided into two paths through a four-way valve.
In the multi-pipe multi-split outdoor unit of the present invention, the high-temperature and high-pressure gas discharged from the compressor of the outdoor unit module is divided into two paths after passing through the four-way valve.
Furthermore, the other path of the refrigerant gas outlet of the compressor of the running outdoor unit module is communicated and connected with the condenser of the non-running outdoor unit module through a high-pressure gas pipe, and the second electronic expansion valve of the running outdoor unit module, the second electronic expansion valve of the non-running outdoor unit module and the first electronic expansion valve are sequentially arranged on the high-pressure gas pipe.
Furthermore, in the operating outdoor unit module and the non-operating outdoor unit module, a refrigerant outlet of the compressor is connected with the four-way valve through a one-way valve.
Further, a check valve is arranged at the outlet of the compressor.
And in the operating outdoor unit module and the non-operating outdoor unit module, a refrigerant outlet of the condenser is communicated and connected with a refrigerant inlet of the indoor unit through a high-pressure liquid pipe.
The refrigerant outlet of the indoor unit is connected to the refrigerant inlet of the gas-liquid separator, and the refrigerant outlet of the gas-liquid separator is connected to the refrigerant inlet of the compressor.
Furthermore, a refrigerant outlet of the indoor unit is communicated and connected with a refrigerant inlet of the gas-liquid separator through a four-way valve.
Furthermore, a refrigerant outlet of the indoor unit is communicated and connected with a refrigerant inlet of the gas-liquid separator through a low-pressure gas pipe, and a refrigerant outlet of the gas-liquid separator is communicated and connected with a refrigerant inlet of the compressor through a low-pressure gas pipe.
The invention has the beneficial effects that:
the multi-pipe multi-split air conditioner outdoor unit can solve the problems that the heat exchange area of the condenser of the outdoor unit module which is not operated cannot be reused and the condensation heat exchange efficiency cannot be improved when the outdoor unit module in the prior art is in partial load, can improve the condensation heat exchange efficiency, reduce the condensation temperature of refrigeration cycle and improve the operation energy efficiency of a multi-split air conditioner system under partial load by fully utilizing the heat exchange area of the condenser of the outdoor unit module which is not operated in a standby state.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of an outdoor unit of a multi-system multi-split air conditioner according to the present invention.
Fig. 2 is a pressure-enthalpy diagram of the refrigerant.
The solid arrows at the various lines in fig. 1 show the refrigerant flow direction.
In the drawing, 101 is a first outdoor unit module, 102 is a second outdoor unit module, 103 is a third outdoor unit module, 1 is a compressor, 2 is a first electronic expansion valve, 3 is a second electronic expansion valve, 4 is a condenser, 5 is an outdoor unit fan, 6 is a four-way valve, 7 is a high-pressure gas pipe, 8 is a gas-liquid separator, 9 is a one-way valve, 10 is a low-pressure gas pipe, 11 is a high-pressure gas pipe, 12 is an indoor unit, and 13 is a branch pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Examples
As shown in fig. 1, the multi-system multi-split outdoor unit according to the present invention includes the following main components: the air conditioner comprises a compressor 1, a first electronic expansion valve 2, a second electronic expansion valve 3, a condenser 4, an outdoor unit fan 5, a low-pressure air pipe 10, a high-pressure liquid pipe 11, a high-pressure air pipe 7, a gas-liquid separator 8, a one-way valve 9 and the like. The energy saving principle is illustrated as an example: the outdoor unit 12 is composed of three outdoor unit modules, which are a first outdoor unit module 101, a second outdoor unit module 102, and a third outdoor unit module 103. When the building is under partial load, only the first outdoor unit module 101 is in an operating state, and the other outdoor unit modules are in a non-operating standby state, and the compressor 1 is not operated in the standby state. The flow paths of the refrigerant at this time are: the high-temperature and high-pressure gas discharged from the compressor 1 is divided into two paths after passing through the four-way valve 6. One path of the heat is condensed and released by entering a condenser through a first electronic expansion valve 2, wherein the first electronic expansion valve 1 plays a role in regulating the flow; the other path of the refrigerant enters the high pressure gas pipe 7 through the second electronic expansion valve 3, then enters the high pressure gas pipe 7 of the second outdoor unit module 102 and the third outdoor unit module 103, then flows through the second electronic expansion valve 3 and the first electronic expansion valve 2 of the second outdoor unit module 102 and the third outdoor unit module 103, then enters the condenser 4 of the second outdoor unit module 102 and the third outdoor unit module 103, and is condensed and releases heat in the condenser 4 of the second outdoor unit module 102 and the third outdoor unit module 103. After condensing and releasing heat in the condensers 4 of the three outdoor unit modules, the condensed and released heat is uniformly sent to the indoor unit 12 side, is throttled and cooled, and is evaporated and absorbed heat in the indoor unit heat exchanger and then returns to the compressor 1 of the first outdoor unit module 101. In this process, only one compressor 1 of the first outdoor unit module 101 in the operating state is operated, and the heat exchange area of the condenser 4 is the total area of the condensers 4 of the three outdoor unit modules, so that the condensing temperature is reduced, and the refrigeration cycle efficiency is improved. It should be added that although the compressors 1 of the second outdoor unit module 102 and the third outdoor unit module 103 are not operated, the outdoor unit fans 5 of the second outdoor unit module 102 and the third outdoor unit module 103 are operated. Preferably, the opening states or valve opening ratios of the first electronic expansion valve 2 and the second electronic expansion valve 3 of the second outdoor unit module 102 and the third outdoor unit module 103 may be controlled, and the outdoor unit fan 5 of the corresponding outdoor unit module may be operated only when the first electronic expansion valve 2 and the second electronic expansion valve 3 of the outdoor unit module are in the opening states.
As shown in fig. 2, the multi-system multi-split outdoor unit of the above embodiment expresses the energy saving principle in the pressure-enthalpy diagram: the circulation process of the conventional multi-split air-conditioning refrigeration cycle in the pressure-enthalpy diagram is I-II-III-IV-I, while the refrigeration cycle process of the embodiment is I-V-VI-VII-I, and as can be seen from the pressure-enthalpy diagram, after the technology of the embodiment is adopted, the condensation pressure of the refrigeration cycle is reduced, the theoretical power consumption of the compressor 1 is reduced, the refrigerating capacity of unit refrigerant flow is increased, and the refrigeration cycle efficiency is improved.
In fig. 1, the multi-system multi-split outdoor unit of the above embodiment mainly takes the first outdoor unit module 101 as an example, the thick solid line represents the high-pressure gas pipe 7, and the refrigerant in the high-pressure gas pipe 7 is in a high-temperature high-pressure gas state; the thick dotted line represents the high-pressure liquid pipe 11, and the state of the refrigerant in the high-pressure liquid pipe 11 is high-temperature high-pressure liquid; the thick dotted line represents the low pressure gas pipe 10, and the state of the refrigerant in the low pressure gas pipe 10 is a low temperature and low pressure gas.
The other path of the refrigerant outlet of the compressor 1 of the running outdoor unit module is connected to the condenser 4 of the non-running outdoor unit module through a high-pressure air pipe 7, and the second electronic expansion valve 3 of the running outdoor unit module, the second electronic expansion valve 3 of the non-running outdoor unit module, and the first electronic expansion valve 2 are sequentially disposed on the high-pressure air pipe 7.
Further, in the operating outdoor unit module and the non-operating outdoor unit module, a refrigerant outlet of the compressor 1 is connected with the four-way valve 6 through a check valve 9.
Further, a check valve 9 is provided at the outlet of the compressor 1.
In the operating outdoor unit module and the non-operating outdoor unit module, the refrigerant outlet of the condenser 4 is connected to the refrigerant inlet of the indoor unit 12 through the high pressure liquid pipe 11.
The refrigerant outlet of the indoor unit 12 is connected to the refrigerant inlet of the gas-liquid separator 8, and the refrigerant outlet of the gas-liquid separator 8 is connected to the refrigerant inlet of the compressor 1.
Further, a refrigerant outlet of the indoor unit 12 is connected to a refrigerant inlet of the gas-liquid separator 8 through the four-way valve 6.
The low-temperature and low-pressure refrigerant from the room flows through the low-pressure gas pipe 10 to the four-way valve 6, then enters the gas-liquid separator 8, and then enters the compressor 1 as a suction port of the refrigerant inlet.
Furthermore, a refrigerant outlet of the indoor unit 12 is connected to a refrigerant inlet of the gas-liquid separator 8 through a low-pressure gas pipe 10, and a refrigerant outlet of the gas-liquid separator 8 is connected to a refrigerant inlet of the compressor 1 through a low-pressure gas pipe 10.
Furthermore, a high-pressure liquid pipe 11 connecting the refrigerant outlet of the condenser 4 and the refrigerant inlet of the indoor unit 12 is provided with a branch pipe 13.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A multi-pipe system multi-split air conditioner outdoor unit comprises an operating outdoor unit module and a non-operating outdoor unit module, and is characterized in that the operating outdoor unit module and the non-operating outdoor unit module respectively comprise a compressor, a first electronic expansion valve, a second electronic expansion valve and a condenser; the refrigerant gas outlet of the compressor of the running outdoor unit module is divided into two paths, wherein one path is communicated and connected with the refrigerant inlet of the first electronic expansion valve of the running outdoor unit module, and the other path is communicated and connected with the refrigerant inlet of the second electronic expansion valve of the running outdoor unit module; a refrigerant outlet of a first electronic expansion valve of the running outdoor unit module is communicated and connected with a refrigerant inlet of a condenser of the running outdoor unit module; a refrigerant outlet of a second electronic expansion valve of the running outdoor unit module is respectively communicated and connected with a refrigerant inlet of a condenser of the non-running outdoor unit module through the second electronic expansion valve and the first electronic expansion valve of the non-running outdoor unit module; the condenser of the running outdoor unit module and the refrigerant outlet of the condenser of the non-running outdoor unit module are both communicated and connected with the refrigerant inlet of the indoor unit side, the refrigerant outlet of the indoor unit side is communicated and connected with the refrigerant inlet of the indoor unit heat exchanger, and the refrigerant outlet of the indoor unit heat exchanger is communicated and connected with the refrigerant inlet of the compressor of the running outdoor unit module.
2. The outdoor unit of claim 1, wherein the number of the outdoor unit modules is at least two.
3. The outdoor unit of claim 1, wherein the number of the non-operating outdoor unit modules is at least two.
4. The outdoor unit of claim 1, wherein the outdoor unit fans of the non-operational outdoor unit modules are in an operational state.
5. The outdoor unit of claim 1, wherein the open states or valve opening ratios of the first and second electronic expansion valves of the non-operating outdoor unit module are controlled such that the outdoor unit fan of the non-operating outdoor unit module operates only when the first and second electronic expansion valves of the non-operating outdoor unit module are in the open states.
6. The outdoor unit of claim 1, wherein the refrigerant outlet of the compressor of the outdoor unit module is divided into two paths by a four-way valve.
7. The outdoor unit of claim 1, wherein the other refrigerant outlet of the compressor of the outdoor unit module is connected to the condenser of the outdoor unit module through a high pressure pipe, and the second electronic expansion valve of the outdoor unit module, and the first electronic expansion valve are sequentially installed on the high pressure pipe.
8. The outdoor unit of claim 6, wherein the refrigerant outlet of the compressor is connected to a four-way valve through a check valve in the outdoor unit module of the outdoor unit of the on-running type and the outdoor unit module of the off-running type.
9. The outdoor unit of claim 1, wherein the refrigerant outlet of the condenser of the outdoor unit module is connected to the refrigerant inlet of the indoor unit through a high pressure liquid pipe.
10. The outdoor unit of claim 1, wherein the refrigerant outlet of the indoor unit is connected to the refrigerant inlet of the gas-liquid separator through a low pressure pipe, and the refrigerant outlet of the gas-liquid separator is connected to the refrigerant inlet of the compressor through a low pressure pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110759668.4A CN113375235A (en) | 2021-07-06 | 2021-07-06 | Multi-pipe system multi-split air conditioner outdoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110759668.4A CN113375235A (en) | 2021-07-06 | 2021-07-06 | Multi-pipe system multi-split air conditioner outdoor unit |
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| Publication Number | Publication Date |
|---|---|
| CN113375235A true CN113375235A (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110759668.4A Pending CN113375235A (en) | 2021-07-06 | 2021-07-06 | Multi-pipe system multi-split air conditioner outdoor unit |
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| Country | Link |
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| CN (1) | CN113375235A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005291700A (en) * | 2005-06-14 | 2005-10-20 | Daikin Ind Ltd | Air-conditioning system |
| CN104596147A (en) * | 2015-01-26 | 2015-05-06 | 珠海格力电器股份有限公司 | Multi-split system |
| CN215216488U (en) * | 2021-07-06 | 2021-12-17 | 青岛腾远设计事务所有限公司 | Multi-pipe system multi-split air conditioner outdoor unit |
-
2021
- 2021-07-06 CN CN202110759668.4A patent/CN113375235A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005291700A (en) * | 2005-06-14 | 2005-10-20 | Daikin Ind Ltd | Air-conditioning system |
| CN104596147A (en) * | 2015-01-26 | 2015-05-06 | 珠海格力电器股份有限公司 | Multi-split system |
| CN215216488U (en) * | 2021-07-06 | 2021-12-17 | 青岛腾远设计事务所有限公司 | Multi-pipe system multi-split air conditioner outdoor unit |
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