Air conditioning system

Patent metadata

Field	Value
Publication number	US-12540766-B2
Application number	US-202318231244-A
Country	US
Kind code	B2
Filing date	Aug 7, 2023
Priority date	Aug 26, 2020
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

Abstract

An air conditioning system includes an indoor heat exchanger, an outdoor heat exchanger, an economizer, and an electric control box: the economizer is disposed between the indoor heat exchanger and the outdoor heat exchanger; the economizer includes a heat exchange body; the heat exchange body is provided with a plurality of first micro-passages for a first refrigerant flow and a plurality of second micro-passages for a second refrigerant flow; the second refrigerant flow absorbs heat from the first refrigerant flow so that the first refrigerant flow is subcooled, or the first refrigerant flow absorbs heat from the second refrigerant flow so that the second refrigerant flow is subcooled, the economizer is further configured to dissipate heat for an electronic component in the electric control box.

First claim

What is claimed is:

1 . An air conditioning system, comprising:
an indoor heat exchanger; an outdoor heat exchanger; an economizer; and an electric control box, wherein the economizer is disposed between the indoor heat exchanger and the outdoor heat exchanger, the economizer comprises a heat exchange body provided with a plurality of first micro-channels for a first refrigerant flow and a plurality of second micro-channels for a second refrigerant flow; the second refrigerant flow absorbs heat from the first refrigerant flow, so as to subcool the first refrigerant flow; or the first refrigerant flow absorbs heat from the second refrigerant flow, so as to subcool the second refrigerant flow; and the economizer is configured to dissipate heat of an electronic component in the electric control box, wherein the electric control box comprises a box body, the box body is provided with a mounting cavity, the electronic component is disposed in the mounting cavity, and the economizer is disposed in the mounting cavity or at least one portion of the economizer is disposed in the mounting cavity.

2 . The air conditioning system as claimed in claim 1 , further comprising a compressor and a gas-liquid separator, wherein the second refrigerant flow flowing through the plurality of second micro-channels is transported to an enthalpy-increasing inlet of the compressor or the gas-liquid separator, and an outlet of the gas-liquid separator is connected to a return port of the compressor.

3 . The air conditioning system as claimed in claim 2 , further comprising a switching assembly, wherein the switching assembly is configured to selectively transport the second refrigerant flow flowing through the plurality of second micro-channels to the enthalpy-increasing inlet of the compressor and an inlet of the gas-liquid separator.

4 . The air conditioning system as claimed in claim 1 , wherein the heat exchange body is a single plate body, and the plurality of first micro-channels and the plurality of second micro-channels are disposed on the single plate body.

5 . The air conditioning system as claimed in claim 4 , wherein the plurality of first micro-channels and the plurality of second micro-channels are alternately disposed on the single plate body.

6 . The air conditioning system as claimed in claim 4 , wherein an end surface of the single plate body is provided with a slot, and the slot is located between the plurality of first micro-channels and the plurality of second micro-channels;
the economizer further comprises a main collecting tube and a baffle plate, the baffle plate is disposed in the main collecting tube, so that the main collecting tube forms a first collecting tube and a second collecting tube separated by the baffle plate; and the first micro-channels and the second micro-channels respectively pass through a wall of the main collecting tube and are communicated with the first collecting tube and the second collecting tube, and the baffle plate is embedded in the slot.

7 . The air conditioning system as claimed in claim 1 , wherein the heat exchange body comprises a first plate body and a second plate body stacked on each other, the plurality of first micro-channels is disposed in the first plate body, and the plurality of second micro-channels are disposed in the second plate body.

8 . The air conditioning system as claimed in claim 7 , wherein the heat exchanging body further comprises a connecting sheet arranged between the first plate body and the second plate body, a solder is disposed on two opposite sides of the connecting sheet, and the solder is configured to fix the connecting sheet with the first plate body and the second plate body on the two opposite sides of the connecting sheet by welding.

9 . The air conditioning system as claimed in claim 1 , wherein the heat exchange body comprises a first tube body and a second tube body nested with each other, the plurality of first micro-channels is disposed in the first tube body, and the plurality of second micro-channels is disposed in the second tube body.

10 . The air conditioning system as claimed in claim 1 , wherein the heat exchange body comprises a first extension part and a second extension part, the second extension part is connected to an end of the first extension part and bent toward one side of the first extension part, and the electronic component is thermally connected to the first extension part and/or the second extension part.

11 . The air conditioning system as claimed in claim 1 , wherein the electric control box further comprises:
a mounting plate disposed in the mounting cavity, such that the mounting cavity forms a first cavity and a second cavity that are respectively located on two opposite sides of the mounting plate; wherein the electronic component is disposed in the second cavity, at least one portion of the heat exchange body is disposed in the first cavity and is thermally connected to the electronic component, and the mounting plate is configured to block condensate water on the heat exchange body from flowing into the second cavity.

12 . The air conditioning system as claimed in claim 1 , wherein the electric control box further comprises:
a mounting plate disposed in the mounting cavity, such that the mounting cavity forms a first cavity and a second cavity that are respectively located on two opposite sides of the mounting plate, the mounting plate is provided with a first vent and a second vent spaced apart from each other in a vertical direction, the heat exchange body is at least partially disposed in the first cavity, and the electronic component is disposed in the second cavity;
wherein the first vent and the second vent are respectively communicated with the first cavity and the second cavity, so as to form a circulating heat dissipation airflow between the first cavity and the second cavity through a temperature difference between the electronic component and the economizer.

13 . The air conditioning system as claimed in claim 1 , wherein the electric control box further comprises:
a mounting plate disposed in the mounting cavity, such that the mounting cavity forms a first cavity and a second cavity that are respectively located on two opposite sides of the mounting plate, the mounting plate is provided with a first vent and a second vent spaced apart from each other, the first vent and the second vent are respectively communicated with the first cavity and the second cavity, and the heat exchange body is at least partially disposed in the first cavity and the electronic component is disposed in the second cavity; and a cooling fan configured to supply wind, to make air in the first cavity flow into the second cavity through the first vent.

14 . The air conditioning system as claimed in claim 1 , wherein the electric control box further comprises:
a mounting plate disposed in the mounting cavity, such that the mounting cavity forms a first cavity and a second cavity that are respectively located on two opposite sides of the mounting plate, the mounting plate is provided with a first vent and a second vent spaced apart from each other, such that air in the first cavity flows into the second cavity through the first vent, and air in the second cavity flows into the first cavity through the second vent; and at least one portion of the heat exchange body is disposed in the first cavity, a spacing direction is between the first vent and the second vent, and a flow direction of a refrigerant flow in the heat exchange body is along the spacing direction; wherein the heat exchange body has a first temperature a

Assignees

• Gd Midea Heating & Ventilating Equipment Co Ltd
• Midea Group Co Ltd

Inventors

• Li Zhaohui
• Li Feng
• Wang Guochun
• Luo Yuzhao

Classifications

• F25B2400/13

  Economisers · CPC title

• F25B41/40

  Fluid line arrangements · CPC title

• F24F1/24

  Cooling of electric components · CPC title

• F25B49/02 Primary

  for compression type machines, plants or systems · CPC title

• F25B2400/23

  Separators · CPC title