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BR-112023015803-B1 - HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME, ELECTRICAL CONTROL BOX AND AIR CONDITIONING SYSTEM

BR112023015803B1BR 112023015803 B1BR112023015803 B1BR 112023015803B1BR-112023015803-B1

Abstract

HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME, ELECTRICAL CONTROL BOX AND AIR CONDITIONING SYSTEM. A heat exchanger and a method of manufacturing the same, an electrical control box and an air conditioning system are provided. The heat exchanger (6) comprises at least two plates (631, 632) and a connecting piece (64); the at least two plates (631, 632) are stacked and are provided separately with a plurality of microchannels (610, 611); the connecting piece (64) is fitted between the adjacent plates (631, 632); a brazing material is provided on two sides of the connecting piece (64); the brazing material is used to braze and fix the connecting piece (64) and the plates (631, 632) on the two sides of the connecting piece (64). According to the heat exchanger (6), the brazing process is simple, the brazing reliability is high and the processing cost can be reduced.

Inventors

  • LI ZHAOHUI
  • LUO YUZHAO
  • Li Feng

Assignees

  • GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD.
  • Midea Group Co., Ltd

Dates

Publication Date
20260317
Application Date
20210926
Priority Date
20210208

Claims (14)

  1. 1. Heat exchanger (6), characterized in that it comprises: at least two plate bodies (613) stacked one on top of the other, wherein each of the at least two plate bodies is provided with a plurality of micropassages (612); and at least one connecting sheet (64), disposed between adjacent plate bodies (613) of the at least two plate bodies (613), wherein a weld is disposed on each of the two opposite sides of the at least one connecting sheet (64) and the weld is configured to weld and fix the at least one connecting sheet (64) to the adjacent plate bodies (613) of the at least two plate bodies (613).
  2. 2. Heat exchanger (6), according to claim 1, characterized in that at least one connecting sheet (64) disposed between adjacent plate bodies (613), of at least two plate bodies (613), is a single-layer structure, or at least one connecting sheet (64) comprises at least two connecting sheets (64) disposed between adjacent plate bodies (613), and the at least two connecting sheets (64) are welded and fixed together using another weld.
  3. 3. Heat exchanger (6), according to claim 1 or 2, characterized in that the melting point of at least one connecting sheet (64) is higher than the melting point of the weld.
  4. 4. Heat exchanger (6), according to claim 3, characterized in that at least one connecting sheet (64) is a metal sheet.
  5. 5. Heat exchanger (6), according to claim 4, characterized in that at least one connecting sheet (64) is an aluminum sheet or a copper sheet.
  6. 6. Heat exchanger (6), according to claim 1, characterized in that the thickness of at least one connecting sheet (64) varies from 0.9 mm to 1.2 mm.
  7. 7. Heat exchanger (6), according to claim 1, characterized in that a weld coverage area on at least one connecting sheet (64), which covers a corresponding area of the adjacent plate bodies (613) that are located on two opposite sides of the connecting sheet (64), is greater than or equal to 80% of an overlap area of the adjacent plate bodies (613) that are located on two sides of the connecting sheet (64).
  8. 8. Heat exchanger (6), according to claim 1, characterized in that the at least two plate bodies (613) comprise a first plate body (631) and a second plate body (632), the first plate body (631) is provided with a plurality of first micropassages (610) for a first coolant medium to flow, the second plate body (632) is provided with a plurality of second micropassages (611) for a second coolant medium to flow, the second coolant medium is configured to absorb heat from the first coolant medium to subcool the first coolant medium, or the first coolant medium is configured to absorb heat from the second coolant medium to subcool the second coolant medium.
  9. 9. Heat exchanger (6), according to claim 1, characterized in that it further comprises a collector tube (621), wherein a tube wall of the collector tube (620) defines at least two insertion holes (793), the at least two plate bodies are corresponding one to one with the at least two insertion holes (793) and are fixed to the collector tube by welding and a distance between the adjacent insertion holes (793) of the at least two insertion holes (793) is greater than or equal to 2 mm.
  10. 10. Heat exchanger (6), according to claim 2, characterized in that it further comprises a main collector tube (623) and a baffle plate (624), wherein the baffle plate (624) is disposed in the main collector tube (623), the main collector tube (623) is divided into at least two groups of collector tubes (621) and (622) corresponding to the plurality of micropassages (610) and (611); and the plurality of micropassages (610) and (611) extends through a tube wall of the main collector tube (623) and is communicated with the at least two groups of collector tubes (621) and (622) correspondingly.
  11. 11. Heat exchanger (6), according to claim 10, characterized in that an insertion slot (601) having a width equal to the lamination thickness of at least two connecting sheets (64) is defined between at least two plate bodies (613) and the deflector plate (624) is embedded in the insertion slot (601).
  12. 12. Method for manufacturing a heat exchanger (6), characterized in that it comprises: providing at least two plate bodies (613); providing at least one connecting sheet (64), wherein a weld is disposed on each of the two opposite sides of the at least one connecting sheet (64); stacking the at least two plate bodies (613) and disposing the at least one connecting sheet (64) between adjacent plate bodies (613) of the at least two plate bodies (613); and heating the at least two plate bodies (613) and the at least one connecting sheet (64) and welding and fixing the connecting sheet (64) to the adjacent plate bodies (613) of the at least two plate bodies (613) using the weld.
  13. 13. Electrical control box (7), characterized in that it comprises: a box body (72); and a heat exchanger (6), according to any one of claims 1 to 11, wherein the heat exchanger (6) is connected to the electrical control box (7) and the heat exchanger (6) is configured to dissipate heat from the electrical control box (7).
  14. 14. Air conditioning system, characterized in that it comprises: a compressor (2); an external heat exchanger (4); an internal heat exchanger (5); and a heat exchanger (6), according to any one of claims 1 to 11, wherein the compressor (2) is configured to provide a circulating refrigerant medium between the external heat exchanger (4) and the internal heat exchanger (5) through connecting pipes, and the heat exchanger (6) is disposed between the external heat exchanger (4) and the internal heat exchanger (5) and communicated with the connecting pipes.

Description

[0001] This application claims priority over Chinese patent application No. 202110183051.2, entitled “HEAT EXCHANGER AND METHOD FOR MANUFACTURER OF THE SAME, ELECTRIC CONTROL BOX, AND AIR CONDITIONING SYSTEM”, filed on February 8, 2021, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD [0002] This disclosure relates to the technical field of air conditioners, in particular to a heat exchanger, a method for manufacturing the heat exchanger, an electrical control box and an air conditioning system. BACKGROUND [0003] Heat exchangers can be widely used in air conditioning systems and other fields. For example, air conditioning systems typically adopt a heat exchanger as an economizer to increase the degree of subcooling of the condenser outlet, thus improving the cooling or heating capacity of a cooler per unit mass. A conventional heat exchanger includes a plate-type heat exchanger. The plate-type heat exchanger is made by pressing thin metal plates onto heat exchange plates with a certain corrugation shape, stacking the metal plates on top of each other, and securing the metal plates with clamps and screws. Passages are formed between the heat exchange plates, and the cooler flows through the passages to achieve heat exchange through the heat exchange plates. The heat exchanger requires multiple layers of stacked heat exchange plates, resulting in a large volume of the heat exchanger. SUMMARY OF THE DISCLOSURE [0004] This disclosure provides a heat exchanger, a method for manufacturing the heat exchanger, an electrical control box and an air conditioning system, with the aim of solving the technical problem of large volume of a conventional plate-type heat exchanger and reducing the processing difficulty and cost of the heat exchanger. [0005] A first aspect of the present disclosure provides a heat exchanger. The heat exchanger includes at least two plate bodies and at least one connecting sheet. The at least two plate bodies are stacked one on top of the other, and each of the at least two plate bodies is provided with a plurality of micropassages. The connecting sheet is disposed between the adjacent plate bodies of the at least two plate bodies. A weld is disposed on each of the two opposite sides of the at least one connecting sheet, and the weld is configured to weld and fix the at least one connecting sheet to the adjacent plate bodies of the at least two plate bodies. [0006] In some embodiments, the at least one connecting sheet disposed between the adjacent plate bodies of the at least two plate bodies is a single-layer structure, or the at least one connecting sheet comprises at least two connecting sheets disposed between the adjacent plate bodies and the at least two connecting sheets are welded and fastened together using another weld. [0007] In some embodiments, the melting point of at least one connecting sheet is higher than the melting point of the solder. [0008] In some embodiments, at least one connecting foil is an aluminum foil or a copper foil. [0009] In some embodiments, the thickness of at least one connecting sheet varies from 0.9 mm to 1.2 mm. [0010] In some embodiments, a weld coverage area on at least one connection sheet, which covers a corresponding area of the adjacent plate bodies located on two opposite sides of the connection sheet, is greater than or equal to 80% of the overlap area of the adjacent plate bodies located on two sides of the connection sheet. [0011] In some embodiments, the at least two plate bodies comprise a first plate body and a second plate body, the first plate body is provided with a plurality of first micropassages for a first refrigerant medium to flow, the second plate body is provided with a plurality of second micropassages for a second refrigerant medium to flow, the second refrigerant medium is configured to absorb heat from the first refrigerant medium to subcool the first refrigerant medium, or the first refrigerant medium is configured to absorb heat from the second refrigerant medium to subcool the second refrigerant medium. [0012] In some embodiments, the heat exchanger also includes a collector tube, a tube wall of the collector tube defines at least two insertion holes, the at least two plate bodies correspond one to one with the at least two insertion holes and are fixed to the collector tube by welding, and a distance between adjacent insertion holes of the at least two insertion holes is greater than or equal to 2 mm. [0013] A second aspect of the present disclosure provides a method for manufacturing a heat exchanger and the method includes: providing at least two plate bodies; providing at least one connecting sheet, wherein a weld is disposed on each of the two opposite sides of the at least one connecting sheet; stacking the at least two plate bodies and disposing the at least one connecting sheet between adjacent plate bodies of the at least two plate bodies; and heating the at least two pl