WO2016155171A1 - Dispositif de réfrigération et montage d'échangeurs de chaleur associé - Google Patents

Dispositif de réfrigération et montage d'échangeurs de chaleur associé Download PDF

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Publication number
WO2016155171A1
WO2016155171A1 PCT/CN2015/085616 CN2015085616W WO2016155171A1 WO 2016155171 A1 WO2016155171 A1 WO 2016155171A1 CN 2015085616 W CN2015085616 W CN 2015085616W WO 2016155171 A1 WO2016155171 A1 WO 2016155171A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
leeward
wind
outlet
refrigerant
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.)
Ceased
Application number
PCT/CN2015/085616
Other languages
English (en)
Chinese (zh)
Inventor
刘燕飞
戚文端
郭振标
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN201520201901.7U external-priority patent/CN204629735U/zh
Priority claimed from CN201510159180.2A external-priority patent/CN104791910A/zh
Application filed by Midea Group Co Ltd, GD Midea Air Conditioning Equipment Co Ltd filed Critical Midea Group Co Ltd
Publication of WO2016155171A1 publication Critical patent/WO2016155171A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • F24F13/30—Arrangement or mounting of heat-exchangers

Definitions

  • the present invention relates to the field of refrigeration, and more particularly to a refrigeration apparatus, and a heat exchanger assembly for the same.
  • the present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, the present invention needs to provide a refrigeration apparatus in which the heat exchanger components of the refrigeration equipment are uniformly heat exchanged.
  • the invention also entails proposing a heat exchanger assembly for a refrigeration unit.
  • a refrigeration apparatus includes: a housing having a vent; a heat exchanger assembly, the heat exchanger assembly being disposed in the housing, the heat exchanger
  • the assembly includes: a split heat exchanger having a near wind portion adjacent to the vent and a leeward portion remote from the vent, wherein the split heat exchanger is provided with a shunt for refrigerant entry a heat exchanger inlet, the near-wind portion is provided with a near-air outlet for the refrigerant to flow out, the leeward portion is provided with a leeward outlet for the refrigerant to flow out; a near-wind heat exchanger, the near-wind heat exchanger Connected to the near-wind portion of the split heat exchanger, the near-wind heat exchanger is provided with a near-wind heat exchanger inlet for refrigerant inflow and a near-wind heat exchanger outlet for refrigerant to flow out a leeward heat exchanger, wherein a distance of the leeward heat exchanger
  • the first communication pipe that can communicate with the outlet of the leeward portion and the inlet of the near-air heat exchanger is disposed in the heat exchanger assembly, further, the heat exchanger outlet and the leeward heat exchange are respectively provided through the arrangement Device
  • the second connecting pipe of the inlet can improve the heat exchange uniformity of the entire heat exchanger component, thereby improving the heat exchange efficiency.
  • refrigeration apparatus may also have the following additional technical features:
  • the vent is formed at the top of the housing and the casing enters the air from the vent.
  • the shunt heat exchanger is arranged obliquely with respect to a vertical direction, the near-wind heat exchanger being arranged obliquely with respect to a vertical direction and having an inverted "V" shape with the shunt heat exchanger Arrangement.
  • At least a portion of the leeward heat exchanger extends substantially in a vertical direction.
  • the near wind heat exchanger inlet is located above the outlet of the near wind heat exchanger; or the leeward heat exchanger inlet is located above the outlet of the leeward heat exchanger.
  • the refrigerating apparatus further includes an auxiliary heat exchanger disposed on a main surface of the shunt heat exchanger adjacent to the vent, the auxiliary heat exchanger There is an auxiliary heat exchanger inlet for the refrigerant to flow in and an auxiliary heat exchanger outlet for the refrigerant to flow out, the auxiliary heat exchanger outlet being in communication with the split heat exchanger inlet.
  • a shunt tee is disposed in the shunt heat exchanger, and three openings in the shunt tee are respectively connected to the shunt heat exchanger inlet, the near wind outlet, and the leeward portion. The exit is connected.
  • a heat exchanger assembly for a refrigerating apparatus including a housing having a vent provided therein, the heat exchanger assembly being disposed in the housing
  • the heat exchanger assembly includes: a split heat exchanger having a near wind portion adjacent to the vent and a leeward portion remote from the vent, the split heat exchanger being provided with refrigeration a flow entering the heat exchanger inlet, the near-wind portion is provided with a near-air outlet for the refrigerant to flow out, and the leeward portion is provided with a leeward outlet for the refrigerant to flow out;
  • the near-wind heat exchanger a near-wind heat exchanger connected to the near-wind portion of the split heat exchanger, wherein the near-wind heat exchanger is provided with a near-wind heat exchanger inlet for refrigerant inflow and a refrigerant for flowing near a wind-heat exchanger outlet; a leeward heat exchanger, wherein a distance of the lee
  • a heat exchanger assembly is provided with a first communication pipe that can communicate with the leeward outlet and the near-wind heat exchanger inlet, and a second communication pipe that communicates with the near-wind outlet and the leeward heat exchanger inlet, respectively.
  • FIG. 1 is a schematic structural view of a refrigeration apparatus according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a heat exchanger assembly of a refrigeration apparatus according to an embodiment of the present invention.
  • Refrigeration device 100
  • Split heat exchanger 21 near wind portion 211; leeward portion 212; split heat exchanger inlet 213; near wind outlet 214; leeward outlet 215; split tee 216;
  • a leeward heat exchanger 23 a leeward heat exchanger 23; a leeward heat exchanger inlet 231; a leeward heat exchanger outlet 232;
  • Auxiliary heat exchanger 26 ; auxiliary heat exchanger inlet 261; auxiliary heat exchanger outlet 262.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining “first” and “second” may explicitly or implicitly include one or More of this feature. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.
  • connection In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or connected integrally; can be directly connected, or indirectly connected through an intermediate medium, which can be the internal communication of two elements or the interaction of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the first feature "on” or “under” the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them.
  • the first feature "above”, “above” and “above” the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature includes the first feature directly below and below the second feature, or merely the first feature level being less than the second feature.
  • a refrigeration apparatus 100 will be described below with reference to FIGS. 1 and 2. It should be noted that the refrigeration device 100 may not only have a cooling function but also have a heating function. Optionally, the refrigeration device 100 may be any device, device, or the like that utilizes an air heat exchanger, and may be, for example, an air conditioner indoor unit, an air conditioner outdoor unit, a refrigerator, or the like.
  • a refrigeration apparatus 100 includes a housing 1 and a heat exchanger assembly 2.
  • the housing 1 is provided with a venting opening 11 in which the heat exchanger assembly 2 is disposed.
  • the vent 11 may be provided at the top of the casing 1, and the vent 11 may be used for the air entering the refrigeration apparatus 100.
  • the heat exchanger assembly 2 includes a split heat exchanger 21, a near wind heat exchanger 22, a leeward heat exchanger 23, and a first communication pipe 24.
  • the vent 11 may be formed at the top of the casing 1 and the casing may enter the air from the vent 11, from other parts of the casing 1. (eg lower part) out of the wind.
  • the heat exchanger assembly 2 is disposed within the housing 1 and opposite the vent opening 11.
  • the split heat exchanger 21 has a near wind portion 211 adjacent to the vent 11 and a leeward portion 212 away from the vent 11.
  • the split heat exchanger 21 is provided with a split heat exchanger inlet 213 for refrigerant to enter, and the near wind portion 211 A near-air portion outlet 214 through which a refrigerant flows out is provided, and a leeward portion outlet 215 through which a refrigerant flows out is provided in the leeward portion 212.
  • the distance of the leeward heat exchanger 23 from the vent 11 is greater than the distance of the near-wind heat exchanger 22 from the vent 11 , that is, the near-wind heat exchanger 22 is disposed adjacent to the vent 11 , and the leeward heat exchanger 23 is disposed away from the vent 11 .
  • the near-wind heat exchanger 22 is connected to the near-wind portion 211 of the split heat exchanger 21, and the near-wind heat exchanger 22 is provided with a near-wind heat exchanger for the refrigerant to flow in.
  • each heat exchanger can have a refrigerant flow path that does not affect each other.
  • the split heat exchanger 21, the near-wind heat exchanger 22, and the leeward heat exchanger 23 may communicate with each other to allow the refrigerant to be in the split heat exchanger 21, the near-wind heat exchanger 22, and Heat exchange is sequentially performed in the leeward heat exchanger 23.
  • a vent 11 is formed at the top of the casing, optionally, the split heat exchanger 21 is arranged obliquely with respect to the vertical direction, and the near-wind heat exchanger 22 is obliquely arranged with respect to the vertical direction and is branched
  • the heat exchanger 21 is arranged in an inverted "V" shape.
  • the upper portion of the split heat exchanger 21 is the near wind portion 211, and the lower portion of the split heat exchanger 21 is the leeward portion 212.
  • the near wind heat exchanger 22 is connected to the upper portion of the split heat exchanger 21 and arranged obliquely, and the leeward heat exchange
  • the separator 23 is connected to a lower portion of the split heat exchanger 21, and optionally, at least a portion of the leeward heat exchanger 23 extends substantially in a vertical direction. As shown in Fig. 1, the upper portion of the leeward heat exchanger 23 extends substantially in a vertical direction. The lower section of the leeward heat exchanger 23 extends obliquely.
  • the split heat exchanger 21 is determined. The closer the air heat exchanger 22 and the leeward heat exchanger 23 are to the position of the vent 11, the better the heat exchange effect is, and the farther away from the position of the vent 11, the worse the heat exchange effect is.
  • the heat exchange effect of the near wind portion 211 is better than the heat exchange effect of the leeward portion 212
  • the heat exchange effect of the near wind heat exchanger 22 is better than that of the leeward heat exchanger 23 Heat transfer effect.
  • the two ends of the first communication pipe 24 are respectively connected to the leeward outlet 215 and the near
  • the wind heat exchanger inlet 221 guides the refrigerant flowing out of the leeward outlet 215 into the near-air heat exchanger 22.
  • the refrigerant having the poor heat exchange effect of the leeward portion 212 can be guided to the inside of the near-wind heat exchanger 22 for heat exchange, so as to improve the heat exchange effect of the refrigerant of the leeward portion 212, thereby improving the entire heat exchanger assembly. 2 heat exchange uniformity.
  • the first communication pipe 24 that can communicate with the leeward outlet 215 and the near-air heat exchanger inlet 221 is provided in the heat exchanger assembly 2, the exchange of the heat exchanger assembly 2 can be improved. Thermal uniformity can improve the performance of the entire refrigeration unit 100.
  • the refrigeration device 100 may further include a second communication pipe 25, and two ends of the second communication pipe 25 respectively communicate with the near wind portion outlet 214 and the leeward heat exchanger inlet 231 to
  • the refrigerant flowing out of the near-air outlet 214 is introduced into the leeward heat exchanger 23.
  • the refrigerant is guided to the inside of the leeward heat exchanger 23 for heat exchange, thereby passing through the first communication pipe 24 and the second communication pipe 25, so that the heat exchange uniformity of the entire heat exchanger assembly 2 can be further improved, thereby improving the heat exchange efficiency.
  • a portion of the refrigerant flowing out of the leeward outlet 215 may flow downward into the leeward heat exchanger 23 for heat exchange, and a portion of the refrigerant flowing from the near-air outlet 214 may flow into the near-wind heat exchanger 22 Perform heat exchange.
  • the present invention is not limited thereto, and all the refrigerant flowing out from the leeward outlet 215 may be guided to the near-wind heat exchanger 22 through the first communication pipe 24 to perform sufficient heat exchange, and all the refrigerant flowing out from the near-air outlet 214 may pass.
  • the second communication pipe 25 is guided to the leeward heat exchanger 23 for heat exchange, whereby the heat exchange uniformity of the heat exchanger assembly 2 can be made more conspicuous.
  • a shunting tee 216 may be disposed in the shunt heat exchanger 21, and three openings in the shunt tee 216 are respectively connected to the shunt heat exchanger inlet 213 and the near wind portion.
  • the outlet 214 is in communication with the leeward outlet 215.
  • the refrigerant is discharged from the separation heat exchanger inlet through the near-air outlet 214 and the leeward outlet 215 through the splitter tee 216, so that the structure of the split heat exchanger 21 can be made compact and reasonable, and the arrangement space of the split heat exchanger 21 can be made. small.
  • the near wind heat exchanger inlet 221 is located above the near wind heat exchanger outlet 222 and the leeward heat exchanger inlet 231 is located above the leeward heat exchanger outlet 232.
  • the near-wind heat exchanger 22 has two rows of heat exchange flow paths, and the refrigerant enters from the near-air heat exchanger inlet 221 and is first on the side of the near-air heat exchanger 22 adjacent to the vent 11 (adjacent The outer surface of the near-wind heat exchanger 22 flows and exchanges heat in the flow path, and then flows to the side of the near-wind heat exchanger 22 facing away from the vent 11 (near the inner surface of the near-wind heat exchanger 22) to flow in the flow path.
  • the leeward heat exchanger 23 has two rows of heat exchange flow paths, and the refrigerant enters from the leeward heat exchanger inlet 231 first on the side of the leeward heat exchanger 23 adjacent to the vent 11 (near the leeward heat exchanger 23). The outer surface) flows heat exchange in the flow path, and then flows to the side of the leeward heat exchanger 23 facing away from the vent 11 (near the inner surface of the near-wind heat exchanger 22) to flow heat exchange, thereby enabling the refrigerant The heat exchange effect is good.
  • the refrigeration apparatus 100 may further include an auxiliary heat exchanger 26 disposed at a main surface of the shunt heat exchanger 21 adjacent to the vent 11 (ie, shunt heat exchange)
  • the auxiliary heat exchanger 26 has an auxiliary heat exchanger inlet 261 for the refrigerant to flow in, and an auxiliary heat exchanger outlet 262 for the refrigerant to flow out, the auxiliary heat exchanger outlet 262 and the split heat exchange.
  • the inlet 213 is connected.
  • the refrigerant can be preferentially exchanged through the auxiliary heat exchanger 26, and then enters the split heat exchanger 21 for heat exchange and splitting, whereby the heat exchange effect of the heat exchanger assembly 2 can be improved, and the heat exchange efficiency is high.
  • a heat exchanger assembly 2 for a refrigeration apparatus 100 in accordance with an embodiment of the second aspect of the present invention is described below.
  • the refrigeration device 100 includes a housing 1 having a vent 11 disposed therein.
  • the heat exchanger assembly 2 is disposed within the housing 1.
  • the heat exchanger assembly 2 includes: a shunt heat exchanger 21, and a near-wind exchange Heater 22, leeward heat exchanger 23 and first connection Through the pipe 24.
  • the split heat exchanger 21 has a near wind portion 211 adjacent to the vent 11 and a leeward portion 212 away from the vent 11.
  • the split heat exchanger 21 is provided with a split heat exchanger inlet 213 for refrigerant to enter, and the near wind portion 211 A near-air portion outlet 214 through which a refrigerant flows out is provided, and a leeward portion outlet 215 through which a refrigerant flows out is provided in the leeward portion 212.
  • the distance of the leeward heat exchanger 23 from the vent 11 is greater than the distance of the near-wind heat exchanger 22 from the vent 11 , that is, the near-wind heat exchanger 22 is disposed adjacent to the vent 11 , and the leeward heat exchanger 23 is disposed away from the vent 11 .
  • the near-wind heat exchanger 22 is connected to the near-wind portion 211 of the split heat exchanger 21, and the near-wind heat exchanger 22 is provided with a near-wind heat exchanger inlet 221 for the refrigerant to flow in and a near-wind exchange for the refrigerant to flow out.
  • the heat exchanger outlet 222, the leeward heat exchanger 23 is connected to the leeward portion 212 of the split heat exchanger 21, and the leeward heat exchanger 23 is provided with a leeward heat exchanger inlet 231 for the refrigerant to flow in and a leeward exchange for the refrigerant to flow out.
  • Heater outlet 232 is provided.
  • the split heat exchanger 21, the near-wind heat exchanger 22 and the leeward heat exchanger 23 are both air-type heat exchangers, that is, the refrigerant flows in the split heat exchanger 21 and the near-wind heat exchanger. 22 or inside the leeward heat exchanger 23, the split heat exchanger 21, the near-wind heat exchanger 22, and the leeward heat exchanger 23 evaporate or condense the refrigerant inside thereof by exchanging heat with the air.
  • the split heat exchanger 21, the near wind heat exchanger 22, and the leeward heat exchanger 23 may be finned heat exchangers.
  • the split heat exchanger 21, the near-wind heat exchanger 22, and the leeward heat exchanger 23 may also be an inflation heat exchanger, a microchannel heat exchanger, or the like.
  • the split heat exchanger 21 is determined. The closer the air heat exchanger 22 and the leeward heat exchanger 23 are to the position of the vent 11, the better the heat exchange effect is, and the farther away from the position of the vent 11, the worse the heat exchange effect is.
  • the heat exchange effect of the near wind portion 211 is better than the heat exchange effect of the leeward portion 212
  • the heat exchange effect of the near wind heat exchanger 22 is better than that of the leeward heat exchanger 23 Heat transfer effect.
  • the two ends of the first communication pipe 24 are respectively connected to the leeward outlet 215 and the near
  • the wind heat exchanger inlet 221 guides the refrigerant flowing out of the leeward outlet 215 into the near-air heat exchanger 22.
  • the refrigerant having the poor heat exchange effect of the leeward portion 212 can be guided to the inside of the near-wind heat exchanger 22 for heat exchange, so as to improve the heat exchange effect of the refrigerant of the leeward portion 212, thereby improving the entire heat exchanger assembly. 2 heat exchange uniformity.
  • the heat exchanger assembly 2 can improve the heat exchange uniformity of the entire heat exchanger assembly 2 by providing the first communication pipe 24 that can communicate the leeward outlet 215 and the near-air heat exchanger inlet 221.
  • the heat exchanger assembly 2 may further include a second communication pipe 25, and two ends of the second communication pipe 25 respectively communicate with the near wind portion outlet 214 and the leeward heat exchanger inlet 231 to
  • the refrigerant flowing out from the near-air portion outlet 214 is introduced into the leeward heat exchanger 23.
  • the refrigerant is guided to the inside of the leeward heat exchanger 23 for heat exchange, thereby passing through the first communication pipe 24 and the second communication pipe 25, so that the heat exchange uniformity of the entire heat exchanger assembly 2 can be further improved, thereby improving the heat exchange efficiency.
  • heat exchanger assembly 2 in accordance with embodiments of the present invention may be applied to any refrigeration device 100 to enhance the performance of various refrigeration devices 100.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

L'invention concerne un dispositif de réfrigération comprenant une coque (1) et un montage (2) d'échangeurs de chaleur. Le montage (2) d'échangeurs de chaleur comprend un échangeur de chaleur diviseur de débit (21) muni d'une partie en amont (211) adjacente à une ouverture de ventilation (11) et une partie en aval (222) éloignée de l'ouverture de ventilation (11) ; un échangeur de chaleur en amont (22) muni d'une entrée d'échangeur (221) de chaleur en amont et d'une sortie d'échangeur (222) de chaleur en amont ; un échangeur de chaleur en aval (23) muni d'une entrée d'échangeur (231) de chaleur en aval et d'une sortie d'échangeur (232) de chaleur en aval ; un premier tuyau de raccordement (24) comportant deux extrémités raccordées respectivement à une sortie (215) de la partie en aval et à l'entrée (221) de l'échangeur de chaleur en amont afin d'introduire le fluide frigorigène qui coule à partir de la sortie (215) de la partie en aval dans l'échangeur de chaleur en amont (22) ; et un second tuyau de raccordement (25) comportant deux extrémités raccordées respectivement à une sortie (214) de la partie en amont et à l'entrée de l'échangeur (231) de chaleur en aval afin d'introduire le fluide frigorigène qui coule à partir de la sortie (214) de la partie en amont dans l'échangeur de chaleur en aval (23). L'invention porte en outre sur un montage d'échangeurs de chaleur pour le dispositif de réfrigération.
PCT/CN2015/085616 2015-04-03 2015-07-30 Dispositif de réfrigération et montage d'échangeurs de chaleur associé Ceased WO2016155171A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201510159180.2 2015-04-03
CN201520201901.7 2015-04-03
CN201520201901.7U CN204629735U (zh) 2015-04-03 2015-04-03 制冷设备和用于制冷设备的换热器组件
CN201510159180.2A CN104791910A (zh) 2015-04-03 2015-04-03 制冷设备和用于制冷设备的换热器组件

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WO2016155171A1 true WO2016155171A1 (fr) 2016-10-06

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08159502A (ja) * 1994-12-08 1996-06-21 Fujitsu General Ltd 空気調和機の室内機
JP2000266399A (ja) * 1999-03-12 2000-09-29 Toyotomi Co Ltd 空気調和機の室内熱交換器の構造
CN1811305A (zh) * 2005-01-28 2006-08-02 Lg电子有限公司 用于改善热效率的热交换器及以其装备的空气调节器
CN103791604A (zh) * 2012-10-31 2014-05-14 大金工业株式会社 空气热交换器
CN104791910A (zh) * 2015-04-03 2015-07-22 广东美的制冷设备有限公司 制冷设备和用于制冷设备的换热器组件

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08159502A (ja) * 1994-12-08 1996-06-21 Fujitsu General Ltd 空気調和機の室内機
JP2000266399A (ja) * 1999-03-12 2000-09-29 Toyotomi Co Ltd 空気調和機の室内熱交換器の構造
CN1811305A (zh) * 2005-01-28 2006-08-02 Lg电子有限公司 用于改善热效率的热交换器及以其装备的空气调节器
CN103791604A (zh) * 2012-10-31 2014-05-14 大金工业株式会社 空气热交换器
CN104791910A (zh) * 2015-04-03 2015-07-22 广东美的制冷设备有限公司 制冷设备和用于制冷设备的换热器组件

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