WO2022237164A1 - Climatiseur de type divisé - Google Patents

Climatiseur de type divisé Download PDF

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Publication number
WO2022237164A1
WO2022237164A1 PCT/CN2021/138343 CN2021138343W WO2022237164A1 WO 2022237164 A1 WO2022237164 A1 WO 2022237164A1 CN 2021138343 W CN2021138343 W CN 2021138343W WO 2022237164 A1 WO2022237164 A1 WO 2022237164A1
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WIPO (PCT)
Prior art keywords
pipeline
branch
section
pipelines
air conditioner
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Application number
PCT/CN2021/138343
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English (en)
Chinese (zh)
Inventor
孙冬松
马振豪
袁珊珊
杜超
佘潇霞
Original Assignee
青岛海尔空调器有限总公司
青岛海尔空调电子有限公司
海尔智家股份有限公司
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Application filed by 青岛海尔空调器有限总公司, 青岛海尔空调电子有限公司, 海尔智家股份有限公司 filed Critical 青岛海尔空调器有限总公司
Publication of WO2022237164A1 publication Critical patent/WO2022237164A1/fr

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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
    • F24F1/26—Refrigerant piping
    • F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
    • 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
    • F25B39/02—Evaporators
    • 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

Definitions

  • the present application relates to the technical field of air conditioning, for example, to a split type air conditioner.
  • Propane (R290) has good thermodynamic performance and low price, widely exists in oil and natural gas, and has good economy.
  • propane (R290) belongs to the category A3 refrigerant in terms of safety level, that is, it is a flammable refrigerant, which is flammable and explosive, and its charging amount in the refrigeration system is strictly limited.
  • the existing air conditioners filled with propane (R290) are limited by the amount of refrigerant charge, so the cooling capacity and energy efficiency coefficient are not high, and the advantages of energy saving, environmental protection and economy of propane (R290) air conditioners are not reflected.
  • the condenser of the existing air conditioner filled with propane (R290) runs through a plurality of refrigerant pipelines.
  • the plurality of refrigerant pipelines are intersected with each other. When disassembling and overhauling, it is necessary to trace the source to distinguish different refrigerant pipelines, and then to carry out subsequent operations.
  • the parallel refrigerant pipelines and nozzles of the condenser of the existing propane (R290) air conditioner are arranged crosswise, which are difficult to distinguish in the process of disassembly and maintenance.
  • the embodiment of the present disclosure provides a split-type air conditioner to solve the problem that the existing propane (R290) air conditioner has parallel refrigerant pipelines and cross-connected nozzles in the condenser, which are difficult to distinguish during disassembly and maintenance. question.
  • the split-type air conditioner includes: a system circuit composed of a compressor, a condenser, an evaporator and connecting pipelines, the condenser is provided with a plurality of parallel first branch pipelines, A plurality of the first branch pipelines are laid out sequentially along a predetermined direction, some or all of the first branch pipelines are in groups of two, and the air inlets of the two first branch pipelines in one group are arranged opposite to each other And the relative setting of the liquid outlet.
  • the first branch pipeline includes at least one U-shaped pipe section; wherein, the air inlet and the liquid outlet of the first branch pipeline are opposite to the pipe section of the first branch pipeline set in the same direction.
  • the inlet and outlet of the first branch pipeline are located on the same side of the condenser.
  • the first branch pipeline includes a plurality of sequentially connected pipe sections passing through the condenser; wherein, the plurality of pipe sections are distributed in at least two rows, and the pipe sections in adjacent rows are arranged in a staggered position.
  • the evaporator is provided with a second branch pipeline, the second branch pipeline includes a liquid inlet and at least two gas outlets, the liquid inlet is located in the second branch pipeline middle pipe section.
  • liquid inlet and the gas outlet of the second branch pipeline are located on the same side of the evaporator.
  • the second branch pipeline includes: a first section of pipeline, configured with a liquid inlet; a second section of pipeline, one end communicates with one end of the first section of pipeline, and the other end is an outlet. Air port; the third section of pipeline, one end communicates with the other end of the first section of pipeline, and the other end is an air outlet; wherein, the pipe section in the second section of pipeline and the pipe section in the third section of pipeline
  • the pipe sections are respectively arranged side by side with the pipe sections in the first section of the pipeline and misplaced.
  • the gas outlet of the second pipeline is located on the same side of the first pipeline as the gas outlet of the third pipeline.
  • the diameter of the first branch pipeline is smaller than the diameter of the second branch pipeline.
  • the wall thickness of the first branch pipeline is smaller than the wall thickness of the second branch pipeline.
  • Multiple first branch pipelines are sequentially arranged on the condenser along the preset direction to solve the problem of complex pipelines caused by the crossing arrangement of multiple first branch pipelines.
  • the air inlets and liquid outlets of the two first branch pipelines in one group are set opposite to each other, which is convenient for users to distinguish, and then it is convenient to find the relevant pipeline ports during disassembly or maintenance;
  • external pipelines at the outlet and liquid outlet it helps to save the material of the connecting pipelines and avoid excessive winding of the external pipelines, which is inconvenient for maintenance or installation.
  • Fig. 1 is a schematic structural diagram of a condenser provided by an embodiment of the present disclosure
  • Fig. 2 is a schematic structural diagram of an evaporator provided by an embodiment of the present disclosure
  • Fig. 3 is a schematic frame diagram of a split air conditioner provided by an embodiment of the present disclosure.
  • 10 condenser; 100: first branch pipeline; 101: air inlet; 102: liquid outlet; 20: evaporator; 200: second branch pipeline; 201: liquid inlet; 202: gas outlet; 203 : first pipeline; 204: second pipeline; 205: third pipeline; 30: compressor.
  • orientations or positional relationships indicated by the terms “upper”, “lower”, “inner”, “middle”, “outer”, “front”, “rear” etc. are based on the orientations or positional relationships shown in the drawings. Positional relationship. These terms are mainly used to better describe the embodiments of the present disclosure and their implementations, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. Moreover, some of the above terms may be used to indicate other meanings besides orientation or positional relationship, for example, the term “upper” may also be used to indicate a certain attachment relationship or connection relationship in some cases. Those skilled in the art can understand the specific meanings of these terms in the embodiments of the present disclosure according to specific situations.
  • connection can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, or two devices, components or Internal connectivity between components.
  • A/B means: A or B.
  • a and/or B means: A or B, or, A and B, these three relationships.
  • an embodiment of the present disclosure provides a split type air conditioner, including: a system loop composed of a compressor 30 , a condenser 10 , an evaporator 20 and their connecting pipelines.
  • a system loop composed of a compressor 30 , a condenser 10 , an evaporator 20 and their connecting pipelines.
  • the air inlet 101 of a branch pipeline 100 is arranged oppositely, and the liquid outlets 102 of two first branch pipelines 100 in a group are arranged oppositely.
  • a plurality of first branch pipelines 100 are sequentially arranged on the condenser 10 along a predetermined direction, so as to solve the problems caused by the crossing arrangement of the existing multiple first branch pipelines 100 .
  • the air inlet 101 and the liquid outlet 102 of the two first branch pipelines 100 in a group are set opposite to each other, which is convenient for users to distinguish , so that it is convenient to find the relevant pipeline ports during disassembly or maintenance; in addition, in the case of external pipelines between the air inlet 101 and the liquid outlet 102, it helps to save the material of the connecting pipelines and avoid excessive winding of the external pipelines Inconvenient maintenance or installation.
  • the condenser includes at least four first branch pipelines, that is, two sets of combinations formed by two first branch pipelines.
  • the multiple parallel first branch pipelines 100 on the condenser 10 are laid out sequentially along a predetermined direction, which can be understood as: the multiple first branch pipelines 100 do not intersect and overlap each other. That is, the condenser 10 is sequentially divided into a plurality of regions, and there is a first branch pipeline 100 in each region. In this way, it is possible to solve the existing problem of complex pipelines caused by the cross arrangement of multiple first branch pipelines 100 .
  • the plurality of first branch pipelines are distributed along a straight line, so as to prevent the distance between the multiple first branch pipelines from being uneven.
  • the liquid outlets 102 of the multiple parallel first branch pipelines 100 on the condenser 10 are communicated through the set pipeline, and communicate with the external connecting pipeline through a main liquid outlet 102, so that the multiple first branches
  • the refrigerant in the pipeline 100 is collected and then flows out, which is convenient for managing the flow of the refrigerant in the condenser 10 .
  • communicating with the external connecting pipeline through one main liquid outlet 102 can also reduce the tightness of the connection between the condenser 10 and the external connecting pipeline, and reduce or avoid the possibility of refrigerant leakage.
  • the air inlets 101 of the multiple parallel first branch pipelines 100 on the condenser 10 can be communicated through a set pipeline, and communicate with an external connecting pipeline through a main air inlet 101 .
  • the refrigerant in the external connecting pipeline passes through the main air inlet 101 and flows into each branch pipeline through the air inlet 101 of the first branch pipeline 100 .
  • the air inlet 101 of the first branch pipeline 100 is configured on the condenser 10 , while the main air inlet 101 is not configured on the condenser 10 .
  • the air inlet 101 is connected with the main air inlet 101 through a connecting pipe. In this way, not only can some or all of the air inlets 101 be activated according to actual needs, but also it is convenient for maintenance.
  • the first branch pipeline 100 is U-shaped or S-shaped, and there is no specific limitation on the number of U-shaped or S-shaped first branch pipelines 100 herein.
  • the first branch pipeline 100 expands the contact area with the condenser 10 by having a plurality of S-shaped structures, thereby helping to improve the heat dissipation efficiency of the air conditioner.
  • a plurality of first branch pipelines 100 are arranged sequentially along a preset direction, and some or all of the first branch pipelines 100 are in groups of two; wherein, the air inlets 101 of the two first branch pipelines 100 in a group are oppositely arranged , the liquid outlets 102 of the two first branch pipelines 100 in one group are arranged opposite to each other. In this way, the air inlets 101 and liquid outlets 102 of the two first branch pipelines 100 in one group are arranged opposite to each other. Operation with the liquid outlet 102 helps to save pipe materials; on the other hand, it is convenient for operators to distinguish the first branch pipeline 100 for maintenance.
  • the first branch pipeline 100 includes at least one U-shaped pipe section; wherein, the air inlet 101 and the liquid outlet 102 of the first branch pipeline 100 are arranged in the same direction relative to the pipe section of the first branch pipeline 100 .
  • the pipe section passing through the first branch pipeline 100 is U-shaped, and like this, the air inlet 101 and the liquid outlet 102 of the first branch pipeline 100 are positioned at the end of the U-shaped pipe section, and the air inlet 101 of the first branch pipeline 100
  • the liquid outlet 102 is arranged in the same direction with respect to the pipe section of the first branch pipeline 100 , so that the operator can concentrate on operating the air inlet 101 and the liquid outlet 102 of the first branch pipeline 100 .
  • the air inlet 101 and the liquid outlet 102 of the first branch pipeline 100 are arranged in the same direction relative to the pipe section of the first branch pipeline 100 , which can also facilitate management.
  • the connecting pipelines connected with the first branch pipeline 100 can be uniformly placed in the same space, which is convenient for storage and helps to maintain the overall appearance of the air conditioner.
  • the first branch pipeline 100 includes a plurality of U-shaped pipe sections
  • the multiple U-shaped pipe sections are connected in sequence, and the air inlet 101 and the liquid outlet 102 of the first branch pipeline 100 are respectively located at the ends of the connected U-shaped pipe sections. Ends.
  • the air inlet 101 and the liquid outlet 102 of the first branch pipeline 100 are arranged in the same direction relative to the pipe section of the first branch pipeline 100 .
  • the plane where the opening of the air inlet 101 of the first branch pipeline 100 is located is located on the same plane as the plane where the opening of the liquid outlet 102 is located. Moreover, the air inlet 101 and the liquid outlet 102 are located on the same side of the pipe section of the first branch pipeline 100 .
  • the inlet 101 and the outlet 102 of the first branch pipeline 100 are located on the same side of the condenser 10 .
  • the air inlet 101 and the liquid outlet 102 of the first branch pipeline 100 are located on the same side of the condenser 10, which can facilitate the installation of the condenser 10, and the pipelines used to connect the condenser 10 to the outside are uniformly stored in the condenser 10 One side of the air conditioner, or stored in a set space of the air conditioner, which is convenient for unified storage and management.
  • the condenser 10 includes a plurality of first branch pipelines 100 , the inlet 101 and the liquid outlet 102 of the plurality of first branch pipelines 100 are located on the same side of the condenser 10 . In this way, after the condenser 10 is installed, the plurality of first branch pipelines 100 of the condenser 10 are used to be uniformly stored on one side of the condenser 10, or in one set of the air conditioner. In a small space, it is convenient for unified storage and management.
  • the air inlet 101 and the liquid outlet 102 of the first branch pipeline 100 are not only located on the same side of the condenser 10, but also arranged close to each other. In this way, it is convenient for operators to disassemble and maintain.
  • the first branch pipeline 100 includes a plurality of sequentially connected pipe sections pierced through the condenser 10; wherein, the plurality of pipe sections are distributed in at least two rows, and the pipe sections in adjacent rows are arranged in a staggered position.
  • the plurality of sequentially connected pipe sections are distributed in at least two rows, and the pipe sections in adjacent rows are arranged in a staggered position, which helps to expand the radiation area of the refrigerant in the first branch pipe 100 to the condenser 10 .
  • a plurality of connected pipe sections connected in sequence may be in a U-shape. In this way, it is possible to realize that the plurality of pipe sections are distributed in at least two rows.
  • the U-shaped pipe sections connecting the two pipe sections are arranged obliquely, so that the pipe sections in adjacent rows are arranged outside.
  • the multiple sequentially connected pipe sections passing through the condenser 10 may be straight pipe sections, so that the pipe sections can be easily disassembled and assembled in the condenser 10 . In addition, it also facilitates processing.
  • a plurality of sequentially connected pipe sections can be arranged in parallel. In this way, on the one hand, it is convenient to assemble and disassemble, and on the other hand, it is convenient to process the condenser 10 .
  • some or all of the multiple sequentially connected pipe sections are arranged obliquely. Wherein, the specific inclination angle and the height of the inlet port and the outlet port are determined according to the actual situation. In this way, when the refrigerant enters the first branch pipeline 100 of the condenser 10, the flow of the refrigerant in the first branch pipeline 100 can be facilitated by a plurality of successively connected pipe sections arranged obliquely, and the flow of the refrigerant can be accelerated. flow.
  • the evaporator 20 is provided with a second branch pipeline 200, the second branch pipeline 200 includes a liquid inlet 201 and at least two gas outlets 202, and the liquid inlet 201 is located in the middle section of the second branch pipeline 200 .
  • the liquid inlet 201 of the second branch pipeline 200 is located in the middle pipe section of the second branch pipeline 200. After the refrigerant enters the second branch pipeline 200 from the liquid inlet 201, the refrigerant flows to the two gas outlets 202 at the same time. This helps to improve the uniformity of refrigerant flow to the gas outlet 202.
  • the liquid inlet 201 is located in the middle pipe section of the second branch pipeline 200
  • the liquid inlet 201 is located in the pipe section of the second branch pipeline 200, and this pipe section is not close to any gas outlet 202, and can be located in the second branch pipeline 200.
  • the middle of the branch pipeline 200 It is also possible to divide the second branch pipeline 200 into three parts, for example, divide the second branch pipeline 200 into a first pipe section, a second pipe section and a third pipe section in sequence, wherein the two gas outlets 202 are respectively located at The first pipe section and the third pipe section, the liquid inlet 201 is located in the second pipe section.
  • the liquid inlet 201 can be connected to the middle pipe section of the second branch pipeline 200 through a micro-pipeline, so that it can prevent the refrigerant from entering the second branch pipeline 200 from the liquid inlet 201, due to the second
  • the obstruction of the pipe wall of the branch pipe 200 weakens the flow velocity of the refrigerant.
  • the micro-pipeline is bent or straight, so that the obstruction of the pipe wall of the second branch pipeline 200 to the refrigerant entering the second branch pipeline 200 from the liquid inlet 201 can be reduced.
  • liquid inlet 201 and the gas outlet 202 of the second branch pipeline 200 are located on the same side of the evaporator 20 .
  • the liquid inlet 201 and the gas outlet 202 through the second branch pipeline 200 are located on the same side of the evaporator 20, which not only helps to accommodate the connecting pipeline between the evaporator 20 and the external pipeline, but also facilitates the operation of the operator.
  • the liquid inlet 201 and the gas outlet 202 of the second branch pipeline 200 and their connecting pipelines are disassembled and maintained.
  • the connecting pipelines connected to the second branch pipeline 200 can be uniformly placed in the same space, which is convenient for storage and helps to maintain the overall appearance of the air conditioner.
  • the second branch pipeline 200 includes: a first section pipeline 203 configured with a liquid inlet 201; a second section pipeline 204, one end communicates with one end of the first section pipeline 203, and the other end is an air outlet 202; the third section pipeline 205, one end communicates with the other end of the first section pipeline 203, and the other end is the gas outlet 202; wherein, the pipe section in the second section pipeline 204 and the pipe section in the third section pipeline 205 They are respectively arranged side by side with the pipe sections in the first section of pipeline 203 and misplaced.
  • the pipe sections in the second section of pipeline 204 and the pipe sections in the third section of pipeline 205 are respectively side by side with the pipe sections in the first section of pipeline 203
  • the road 203 is bent, and the third section of pipeline 205 is bent relative to the first section of pipeline 203 .
  • the pipe sections in the second pipe line 204 and the pipe sections in the first pipe line 203 can be arranged side by side
  • the pipe sections in the third pipe line 205 and the pipe sections in the first pipe line 203 can be arranged side by side.
  • the gas outlet 202 can be made close to the liquid inlet 201, that is, the gas outlet 202 and the liquid inlet 201 are arranged as concentrated as possible . In this way, the connecting pipeline between the evaporator 20 and the outside can be conveniently disassembled by the operator.
  • the gas outlet 202 at the end of the third section pipeline 205 can be close to the liquid inlet 201, that is, the gas outlet 202 is connected to the inlet port 201.
  • the liquid ports 201 are arranged as concentratedly as possible. In this way, the connecting pipeline between the evaporator 20 and the outside can be conveniently disassembled by the operator.
  • the radiation area of the refrigerant in the two-branch pipeline 200 to the evaporator 20 improves the heat dissipation efficiency.
  • the dislocation setting in "the pipe section in the second section of pipeline 204 and the pipe section in the first section of pipeline 203" can be understood as the pipe section in the second section of pipeline 204 and the pipe section in the first section of pipeline 203
  • the pipe sections are arranged in two rows, and the pipe sections in the two rows are arranged at intervals.
  • the gas outlet 202 of the second pipeline 204 and the gas outlet 202 of the third pipeline 205 are located on the same side of the first pipeline 203 .
  • the gas outlet 202 of the evaporator 20 communicates with the external connecting pipeline through a main gas outlet 202, and setting the two gas outlets 202 on the same side of the first section of the pipeline 203 can not only help save pipe materials,
  • the gas outlet 202 of the second pipeline 204 and the gas outlet 202 of the third pipeline 205 are located on the same side of the evaporator 20 .
  • the connecting pipelines between the second-section pipeline 204 and the third-section pipeline 205 and the external pipeline can be conveniently collected and processed.
  • the diameter of the first branch pipeline 100 is smaller than the diameter of the second branch pipeline 200 .
  • the pipe diameter of the first branch pipeline 100 is smaller than the pipe diameter of the second branch pipeline 200, the charging amount of the R290 refrigerant can be greatly reduced, thereby reducing the potential safety hazard of the air conditioner.
  • the distributed arrangement of the first branch pipeline 100 and the second branch pipeline 200 can also meet the cooling demand of the air conditioner and improve the overall energy efficiency of the air conditioner.
  • the wall thickness of the first branch pipeline 100 is smaller than the wall thickness of the second branch pipeline 200 .
  • the heat exchange efficiency between the condenser 10 and the air can be improved, thereby improving the performance of the air conditioner.
  • the overall energy efficiency of the air conditioner meets the cooling demand of the air conditioner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un climatiseur de type divisé, se rapportant au domaine technique de la climatisation et comprenant : une boucle de système formée par un compresseur (30), un condenseur (10), un évaporateur (20) et des conduites de raccordement de ceux-ci. Le condenseur (10) est pourvu d'une pluralité de premières conduites de dérivation (100) reliées en parallèle, et la pluralité de premières conduites de dérivation (100) sont agencées séquentiellement dans une direction prédéfinie ; une partie ou la totalité des premières conduites de dérivation (100) sont groupées par paires et des entrées d'air (101) des deux premières conduites de dérivation (100) dans un groupe sont disposées de manière opposée et des sorties de liquide (102) de celles-ci sont agencées de manière opposée. La pluralité de premières conduites de dérivation (100) sont agencées de manière séquentielle sur le condenseur (10) dans la direction prédéfinie, ce qui permet de résoudre le problème de complexité de conduites provoqué par la disposition croisée d'une pluralité de premières conduites de dérivation existantes (100). De plus, la pluralité de premières conduites de dérivation (100) sont regroupées par paires, et les entrées d'air (101) et les sorties de liquide (102) des deux premières conduites de dérivation (100) dans un groupe sont agencées de manière opposée, respectivement, facilitant ainsi la discrimination par un utilisateur et facilitant en outre la découverte d'orifices de conduites associés pendant le désassemblage ou la maintenance. De plus, les matériaux des conduites de raccordement peuvent être économisés et l'inconvénient de la maintenance ou de l'installation dues à un enroulement excessif de conduites externes est évité.
PCT/CN2021/138343 2021-05-08 2021-12-15 Climatiseur de type divisé WO2022237164A1 (fr)

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CN202120977452.0 2021-05-08
CN202120977452.0U CN215260193U (zh) 2021-05-08 2021-05-08 分体式空调器

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Publication number Priority date Publication date Assignee Title
JP2002340445A (ja) * 1996-10-02 2002-11-27 Matsushita Electric Ind Co Ltd フィン付き熱交換器
CN1773186A (zh) * 2004-11-11 2006-05-17 三星电子株式会社 热交换器
JP2007255785A (ja) * 2006-03-23 2007-10-04 Matsushita Electric Ind Co Ltd フィン付き熱交換器及び空気調和機
CN201382631Y (zh) * 2008-11-24 2010-01-13 广东美的电器股份有限公司 风管机用蒸发器
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CN113899116A (zh) * 2021-09-19 2022-01-07 青岛海尔空调器有限总公司 换热器、制冷循环系统
CN113932486A (zh) * 2021-09-19 2022-01-14 青岛海尔空调器有限总公司 换热器、制冷循环系统

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