WO2024244250A1 - Heat exchanger assembly and indoor air-conditioning unit - Google Patents

Abstract

A heat exchanger assembly and an indoor air-conditioning unit. A heat exchanger assembly (100) comprises: a main heat exchanger (1), the main heat exchanger (1) comprising a front heat exchanger (11), a middle heat exchanger (12), and a rear heat exchanger (13), and the front heat exchanger (11), the middle heat exchanger (12), and the rear heat exchanger (13) being sequentially assembled; and a back tube heat exchanger (2), the back tube heat exchanger (2) being arranged on the windward side of the main heat exchanger (1), and the back tube heat exchanger (2) being provided with a fourth heat exchange tube (21). When the heat exchanger assembly (100) is in a cooling mode, a refrigerant flows from the back tube heat exchanger (2) to the main heat exchanger (1), and the refrigerant flowing out of the back tube heat exchanger (2) is distributed to multiple flow paths to flow to the front heat exchanger (11), the middle heat exchanger (12), and the rear heat exchanger (13) at the same time.

Description

Heat exchanger components and air conditioner indoor units

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent applications with application numbers 202321358896.1, 202321358942.8, 202321358913.1, and 202321358848.2, and with an application date of May 30, 2023, and claims the priority of the Chinese patent applications. The entire contents of the Chinese patent applications are hereby introduced into this application as a reference.

Technical Field

The present application relates to the technical field of air handling devices, and in particular to a heat exchanger assembly and an air conditioner indoor unit.

Background Art

The heat exchanger is an important part of the air conditioner. As the market's requirements for air conditioner energy efficiency are getting higher and higher, the requirements for the heat exchange flow path of the heat exchanger are getting higher and higher. However, the unreasonable heat exchange flow path of the existing heat exchanger leads to uneven heat exchange, thereby reducing the energy efficiency of the heat exchanger.

Summary of the invention

The present application aims to solve one of the technical problems in the related art at least to a certain extent. The present application proposes a heat exchanger assembly, which effectively improves the heat exchange efficiency of the heat exchanger assembly, reduces the energy consumption of the heat exchanger assembly, and improves the energy efficiency of the heat exchanger assembly.

The present application also proposes an air-conditioning indoor unit, comprising the above-mentioned heat exchanger assembly.

According to the heat exchanger assembly of the embodiment of the present application, it includes: a main heat exchanger, the main heat exchanger includes a front heat exchanger, a middle heat exchanger and a rear heat exchanger, the front heat exchanger, the middle heat exchanger and the rear heat exchanger are spliced in sequence, the front heat exchanger has a first heat exchange tube, the middle heat exchanger has a second heat exchange tube, and the rear heat exchanger has a third heat exchange tube; a back tube heat exchanger, the back tube heat exchanger is arranged on the windward side of the main heat exchanger, and the back tube heat exchanger has a fourth heat exchange tube; when the heat exchanger assembly is cooling, the refrigerant flows from the back tube heat exchanger to the main heat exchanger, and the refrigerant flowing out of the back tube heat exchanger is divided into multiple flow paths and flows to the front heat exchanger, the middle heat exchanger and the rear heat exchanger at the same time.

According to the heat exchanger assembly of the embodiment of the present application, by setting a main heat exchanger and a back-tube heat exchanger arranged on the windward side of the main heat exchanger, the main heat exchanger includes a front heat exchanger, a middle heat exchanger and a rear heat exchanger spliced in sequence, the front heat exchanger has a first heat exchange tube, the middle heat exchanger has a second heat exchange tube, the rear heat exchanger has a third heat exchange tube, and the back-tube heat exchanger has a fourth heat exchange tube. When the heat exchanger assembly is refrigerated, the refrigerant flowing out of the back-tube heat exchanger is divided into multiple flow paths and flows to the front heat exchanger, the middle heat exchanger and the rear heat exchanger at the same time, so that the heat exchange pipeline of the heat exchanger assembly is more reasonable, thereby effectively improving the heat exchange efficiency of the heat exchanger assembly, reducing the energy consumption of the heat exchanger assembly, and improving the energy efficiency of the heat exchanger assembly. At the same time, the small-diameter heat exchange tube has good applicability and high heat exchange efficiency. Under the premise of the same heat exchange capacity, the volume of the heat exchanger assembly can be relatively reduced, which is conducive to the miniaturization of the air conditioner indoor unit.

In some embodiments of the present application, the flow path of the heat exchanger assembly includes an input flow path, a first flow path, a second flow path and a third flow path, the input flow path flows through the fourth heat exchange tube of the back tube heat exchanger, the first flow path flows through the first heat exchange tube of the front heat exchanger and part of the second heat exchange tube of the middle heat exchanger, the second flow path flows through the remaining part of the second heat exchange tube of the middle heat exchanger, and the third flow path flows through the third heat exchange tube of the rear heat exchanger. When the heat exchanger assembly is refrigerated, the refrigerant flows through the input flow path and then is simultaneously diverted into the first flow path, the second flow path and the third flow path.

In some embodiments of the present application, the middle heat exchanger includes a first area and a second area, the first area is located on a side of the second area close to the front heat exchanger, the first flow path flows through the second heat exchange tube in the first area, and the second flow path flows through the second heat exchange tube in the second area.

In some embodiments of the present application, the first heat exchange tube includes the first heat exchange tube on the windward side and the first heat exchange tube on the leeward side, the second heat exchange tube includes the second heat exchange tube on the windward side and the second heat exchange tube on the leeward side, and the first flow path flows through the second heat exchange tube on the windward side of the middle heat exchanger, the first heat exchange tube on the windward side of the front heat exchanger, the first heat exchange tube on the leeward side of the front heat exchanger, and the second heat exchange tube on the leeward side of the middle heat exchanger in sequence.

In some embodiments of the present application, the second heat exchange tube includes the second heat exchange tube on the windward side and the second heat exchange tube on the leeward side, and the second flow path flows through the second heat exchange tube on the windward side of the middle heat exchanger and the second heat exchange tube on the leeward side of the middle heat exchanger in sequence.

In some embodiments of the present application, the second heat exchange tube includes the second heat exchange tube on the windward side and the second heat exchange tube on the leeward side, the middle heat exchanger includes a first area and a second area, the first area includes part of the second heat exchange tube on the windward side and part of the second heat exchange tube on the leeward side, the second area includes the rest of the second heat exchange tube on the windward side and the rest of the second heat exchange tube on the leeward side, the first flow path flows through the second heat exchange tube in the first area and the first heat exchange tube of the front heat exchanger, and the second flow path flows through the second heat exchange tube in the second area.

In some embodiments of the present application, the first heat exchange tube includes the first heat exchange tube on the windward side and the first heat exchange tube on the leeward side, and the first flow path flows sequentially through the second heat exchange tube on the windward side of the first region, the first heat exchange tube on the windward side of the front heat exchanger, the first heat exchange tube on the leeward side of the front heat exchanger, and the second heat exchange tube on the leeward side of the first region.

In some embodiments of the present application, the second flow path flows from the second heat exchange tube on the windward side of the second region to the second heat exchange tube on the leeward side of the second region.

In some embodiments of the present application, the first region is located on a side of the second region close to the front heat exchanger.

In some embodiments of the present application, the input flow path is connected to the first flow path, the second flow path, and the third flow path through a distributor.

In some embodiments of the present application, the third heat exchange tube includes the third heat exchange tube on the windward side and the third heat exchange tube on the leeward side, and the third flow path flows from the third heat exchange tube on the windward side of the rear heat exchanger to the third heat exchange tube on the leeward side of the rear heat exchanger.

In some embodiments of the present application, the number of heat exchange tubes in the first flow path is greater than the number of heat exchange tubes in the third flow path, and the number of heat exchange tubes in the third flow path is greater than the number of heat exchange tubes in the second flow path.

In some embodiments of the present application, the heat exchange flow path of the heat exchanger assembly includes an input flow path, a first flow path, a second flow path, a third flow path and a fourth flow path, wherein the input flow path flows through the fourth heat exchange tube of the back tube heat exchanger, the first flow path flows through the first heat exchange tube of the front heat exchanger, the second flow path flows through part of the second heat exchange tube of the middle heat exchanger, the third flow path flows through part of the second heat exchange tube of the middle heat exchanger and the The third heat exchange tube is part of the rear heat exchanger, and the fourth flow path flows through the remaining third heat exchange tube of the rear heat exchanger and the remaining second heat exchange tube of the middle heat exchanger. When the heat exchanger assembly is refrigerated, the refrigerant flows through the input flow path and then is split into the first flow path, the second flow path, the third flow path and the fourth flow path.

In some embodiments of the present application, the input flow path is connected to the first flow path, the second flow path, the third flow path, and the fourth flow path through a distributor.

In some embodiments of the present application, the first heat exchange tube includes the first heat exchange tube on the windward side and the first heat exchange tube on the leeward side, and the first flow path flows from the first heat exchange tube on the windward side of the front heat exchanger to the first heat exchange tube on the leeward side of the front heat exchanger.

In some embodiments of the present application, the second heat exchange tube includes the second heat exchange tube on the windward side and the second heat exchange tube on the leeward side, the middle heat exchanger includes a third area, a fourth area and a fifth area, the third area includes part of the second heat exchange tube on the windward side and part of the second heat exchange tube on the leeward side, the fourth area includes the second heat exchange tube on the remaining part of the windward side and the second heat exchange tube on the leeward side, the fifth area includes the second heat exchange tube on the remaining part of the leeward side, the third heat exchange tube includes the third heat exchange tube on the windward side and the third heat exchange tube on the leeward side heat pipe, the rear heat exchanger includes a sixth area and a seventh area, the sixth area includes part of the third heat exchange tube on the windward side and part of the third heat exchange tube on the leeward side, the seventh area includes the third heat exchange tube of the remaining part of the windward side and the third heat exchange tube of the remaining part of the leeward side, the second flow path flows through the second heat exchange tube of the third area, the third flow path flows through the second heat exchange tube of the fourth area and the third heat exchange tube of the sixth area, and the fourth flow path flows through the second heat exchange tube of the fifth area and the third heat exchange tube of the seventh area.

In some embodiments of the present application, the second flow path flows from the second heat exchange tube on the windward side of the third region to the second heat exchange tube on the leeward side of the third region.

In some embodiments of the present application, the third flow path flows sequentially through the second heat exchange tube on the windward side of the fourth region, the third heat exchange tube on the windward side of the sixth region, the third heat exchange tube on the leeward side of the sixth region, and the second heat exchange tube on the leeward side of the fourth region.

In some embodiments of the present application, the fourth flow path sequentially flows through the third heat exchange tube on the windward side of the seventh region, the third heat exchange tube on the leeward side of the seventh region, and the second heat exchange tube on the leeward side of the fifth region.

In some embodiments of the present application, the third region is located on a side of the fourth region close to the front heat exchanger, along the length direction of the middle heat exchanger, the fifth region is located between the third region and the fourth region, and the sixth region is located on a side of the seventh region close to the middle heat exchanger.

In some embodiments of the present application, the number of heat exchange tubes in the first flow path, the second flow path, the third flow path, and the fourth flow path is the same.

In some embodiments of the present application, the heat exchange flow path of the heat exchanger assembly includes an input flow path, a first flow path, a second flow path, a third flow path, a fourth flow path and a fifth flow path, the input flow path flows through the fourth heat exchange tube of the back tube heat exchanger, the first flow path flows through a portion of the first heat exchange tube of the front heat exchanger, the second flow path flows through the remaining portion of the first heat exchange tube of the front heat exchanger and a portion of the second heat exchange tube of the middle heat exchanger, the third flow path flows through a portion of the second heat exchange tube of the middle heat exchanger, the fourth flow path flows through the remaining portion of the second heat exchange tube of the middle heat exchanger and a portion of the third heat exchange tube of the rear heat exchanger, and the fifth flow path flows through the remaining portion of the third heat exchange tube of the rear heat exchanger. When the heat exchanger assembly is refrigerated, the refrigerant flows through the input flow path and then is simultaneously diverted into the first flow path, the second flow path, the third flow path, the fourth flow path and the fifth flow path.

In some embodiments of the present application, the input flow path is connected to the first flow path, the second flow path, the third flow path, the fourth flow path and the fifth flow path through a distributor.

In some embodiments of the present application, the first heat exchange tube includes the first heat exchange tube on the windward side and the first heat exchange tube on the leeward side, the second heat exchange tube includes the second heat exchange tube on the windward side and the second heat exchange tube on the leeward side, the third heat exchange tube includes the third heat exchange tube on the windward side and the third heat exchange tube on the leeward side, the front heat exchanger includes an eighth region and a ninth region, the eighth region includes part of the first heat exchange tube on the windward side and the first heat exchange tube on the leeward side, the ninth region includes the remaining part of the first heat exchange tube on the windward side, the middle heat exchanger includes a tenth region, an eleventh region and a twelfth region, the tenth region includes part of the second heat exchange tube on the windward side and part of the second heat exchange tube on the leeward side, the eleventh region includes part of the second heat exchange tube on the windward side and the remaining part on the leeward side The second heat exchange tube, the twelfth area includes the rest of the second heat exchange tube on the windward side, the rear heat exchanger includes the thirteenth area and the fourteenth area, the thirteenth area includes part of the third heat exchange tube on the windward side and part of the third heat exchange tube on the leeward side, the fourteenth area includes the rest of the third heat exchange tube on the windward side and the rest of the third heat exchange tube on the leeward side, the first flow path flows through the first heat exchange tube in the eighth area, the second flow path flows through the first heat exchange tube in the ninth area and the second heat exchange tube in the tenth area, the third flow path flows through the second heat exchange tube in the eleventh area, the fourth flow path flows through the second heat exchange tube in the twelfth area and the third heat exchange tube in the thirteenth area, and the fifth flow path flows through the third heat exchange tube in the fourteenth area.

In some embodiments of the present application, the first flow path flows from the first heat exchange tube on the windward side of the eighth region to the first heat exchange tube on the leeward side of the eighth region.

In some embodiments of the present application, the second flow path sequentially flows through the first heat exchange tube on the windward side of the ninth region, the second heat exchange tube on the windward side of the tenth region, and the second heat exchange tube on the leeward side of the tenth region.

In some embodiments of the present application, the third flow path flows through the second heat exchange tube on the windward side of the eleventh region and the second heat exchange tube on the leeward side of the eleventh region in sequence.

In some embodiments of the present application, the fourth flow path sequentially flows through the second heat exchange tube on the windward side of the twelfth region, the third heat exchange tube on the windward side of the thirteenth region, and the third heat exchange tube on the leeward side of the thirteenth region.

In some embodiments of the present application, the fifth flow path sequentially flows through the third heat exchange tube on the windward side of the fourteenth region and the third heat exchange tube on the leeward side of the fourteenth region.

In some embodiments of the present application, the thirteenth region is located on a side of the fourteenth region close to the middle heat exchanger, the first heat exchange tube on the windward side of the ninth region is located on a side of the first heat exchange tube on the windward side of the eighth region close to the middle heat exchanger, the second heat exchange tube on the windward side of the tenth region is located on a side of the second heat exchange tube on the windward side of the twelfth region close to the front heat exchanger, along the length direction of the middle heat exchanger, the second heat exchange tube on the windward side of the twelfth region is located between the second heat exchange tube on the windward side of the tenth region and the second heat exchange tube on the windward side of the twelfth region, and the second heat exchange tube on the leeward side of the tenth region is located on the leeward side of the eleventh region The second heat exchange tube is located on a side close to the front heat exchanger.

In some embodiments of the present application, the number of heat exchange tubes in the first flow path, the second flow path, the third flow path, the fourth flow path, and the fifth flow path is the same.

In some embodiments of the present application, the back-tube heat exchanger is arranged on the windward side of the middle heat exchanger.

In some embodiments of the present application, a baffle is provided on the windward side of the connection between the middle heat exchanger and the rear heat exchanger.

In some embodiments of the present application, a seal is provided between the baffle and the middle heat exchanger and between the baffle and the rear heat exchanger.

In some embodiments of the present application, the aperture of the fourth heat exchange tube is larger than the apertures of the first heat exchange tube, the second heat exchange tube and the third heat exchange tube, and the apertures of the first heat exchange tube, the second heat exchange tube and the third heat exchange tube are the same.

In some embodiments of the present application, the aperture of the fourth heat exchange tube is 7 mm, and the apertures of the first heat exchange tube, the second heat exchange tube and the third heat exchange tube are 5 mm.

An air-conditioning indoor unit according to an embodiment of the present application includes the above-mentioned heat exchanger assembly.

According to the air conditioner indoor unit of the embodiment of the present application, by setting the above-mentioned heat exchanger assembly, a main heat exchanger and a back-tube heat exchanger arranged on the windward side of the main heat exchanger are arranged, the main heat exchanger includes a front heat exchanger, a middle heat exchanger and a rear heat exchanger spliced in sequence, the front heat exchanger has a first heat exchange tube, the middle heat exchanger has a second heat exchange tube, the rear heat exchanger has a third heat exchange tube, and the back-tube heat exchanger has a fourth heat exchange tube. When the heat exchanger assembly is refrigerated, the refrigerant flowing out of the back-tube heat exchanger is divided into multiple flow paths and flows to the front heat exchanger, the middle heat exchanger and the rear heat exchanger at the same time, so that the heat exchange pipeline of the heat exchanger assembly is more reasonable, thereby effectively improving the heat exchange efficiency of the air conditioner indoor unit, reducing the energy consumption of the air conditioner indoor unit, and improving the energy efficiency of the air conditioner indoor unit. At the same time, the small-diameter heat exchange tube has good applicability and high heat exchange efficiency. Under the premise of the same heat exchange capacity, the volume of the heat exchanger assembly can be relatively reduced, which is conducive to the miniaturization of the air conditioner indoor unit.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG1 is a schematic diagram of a heat exchanger assembly according to some embodiments of the present application;

FIG2 is a schematic diagram of a heat exchanger according to other embodiments of the present application;

FIG3 is a schematic diagram of a flow path of a refrigerant in a heat exchanger according to other embodiments of the present application;

4 is a schematic diagram of flow paths of refrigerant in an input flow path, a first flow path, and an output flow path of a heat exchanger according to other embodiments of the present application;

5 is a schematic diagram of flow paths of refrigerant in an input flow path, a second flow path, and an output flow path of a heat exchanger according to other embodiments of the present application;

6 is a schematic diagram of flow paths of refrigerant in an input flow path, a third flow path, and an output flow path of a heat exchanger according to other embodiments of the present application;

FIG7 is a schematic diagram of a flow path of a refrigerant in a heat exchanger according to some other embodiments of the present application;

8 is a schematic diagram of flow paths of refrigerant in an input flow path, a first flow path, and an output flow path of a heat exchanger according to still other embodiments of the present application;

9 is a schematic diagram of flow paths of refrigerant in the input flow path, the second flow path and the output flow path of a heat exchanger according to some other embodiments of the present application;

10 is a schematic diagram of flow paths of refrigerant in the input flow path, the third flow path and the output flow path of a heat exchanger according to still other embodiments of the present application;

11 is a schematic diagram of flow paths of refrigerant in the input flow path, the fourth flow path and the output flow path of a heat exchanger according to some other embodiments of the present application;

FIG12 is a schematic diagram of a flow path of a refrigerant in a heat exchanger according to still other embodiments of the present application;

13 is a schematic diagram of flow paths of refrigerant in an input flow path, a first flow path, and an output flow path of a heat exchanger according to still other embodiments of the present application;

14 is a schematic diagram of flow paths of refrigerant in an input flow path, a second flow path, and an output flow path of a heat exchanger according to still other embodiments of the present application;

15 is a schematic diagram of flow paths of refrigerant in the input flow path, the third flow path and the output flow path of a heat exchanger according to still other embodiments of the present application;

16 is a schematic diagram of flow paths of refrigerant in the input flow path, the fourth flow path and the output flow path of a heat exchanger according to still other embodiments of the present application;

FIG. 17 is a schematic diagram of the flow paths of the refrigerant in the input flow path, the fifth flow path, and the output flow path of the heat exchanger according to some further embodiments of the present application.

Reference numerals:
100, heat exchanger assembly; 1, main heat exchanger; 11, front heat exchanger; 111, first heat exchange tube; 12, middle heat exchanger; 121, second heat exchange tube; 13,
Rear heat exchanger; 131, third heat exchange tube; 141, first area; 142, second area; 143, third area; 144, fourth area; 145, fifth area; 146, sixth area; 147, seventh area; 148, eighth area; 149, ninth area; 1410, tenth area; 1411, eleventh area; 1412, twelfth area; 1413, thirteenth area; 1414, fourteenth area; 2, back-tube heat exchanger; 21, fourth heat exchange tube; 3, input flow path; 4, first flow path; 5, second flow path; 6, third flow path; 7, output flow path; 8, fourth flow path; 9, fifth flow path; 20, air inlet; 30, air outlet; 40, distributor; 50, baffle.

DETAILED DESCRIPTION

The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, but cannot be understood as limiting the present application.

In the description of the present application, it should be understood that the terms "upper", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

A heat exchanger assembly 100 according to an embodiment of the present application is described below with reference to the accompanying drawings.

As shown in FIG. 1 , a heat exchanger assembly 100 according to an embodiment of the present application includes a main heat exchanger 1 and a back-tube heat exchanger 2 .

The main heat exchanger 1 includes a front heat exchanger 11, a middle heat exchanger 12 and a rear heat exchanger 13, and the front heat exchanger 11, the middle heat exchanger 12 and the rear heat exchanger 13 are spliced in sequence. The front heat exchanger 11 has a first heat exchange tube 111 , the middle heat exchanger 12 has a second heat exchange tube 121 , the rear heat exchanger 13 has a third heat exchange tube 131 , and the back tube heat exchanger 2 is arranged on the windward side of the main heat exchanger 1 , and the back tube heat exchanger 2 has a fourth heat exchange tube 21 .

It is understandable that after the air conditioner indoor unit is assembled, the side facing the user is the front, and the side facing the wall is the rear, while the wall-mounted air conditioner indoor unit adopts a conventional structure with an air inlet 20 on the top and an air outlet 30 on the bottom, that is, the heat exchanger assembly 100 is located upstream of the wind wheel. The main heat exchanger 1 has a windward side and a leeward side. In the direction of airflow, the leeward side is located downstream of the windward side, and the windward side is located upstream of the leeward side. Therefore, by arranging the back-tube heat exchanger 2 on the windward side where the airflow flows faster, the heat exchange capacity of the back-tube heat exchanger 2 can be increased, thereby improving the heat exchange energy efficiency of the heat exchanger assembly 100.

Furthermore, when the heat exchanger assembly 100 is cooling, the refrigerant flows from the back tube heat exchanger 2 to the main heat exchanger 1, and the refrigerant flowing out of the back tube heat exchanger 2 is divided into multiple flow paths and flows to the front heat exchanger 11, the middle heat exchanger 12 and the rear heat exchanger 13 at the same time. It can be understood that when the heat exchanger assembly 100 is cooling, the refrigerant first flows into the fourth heat exchange tube 21 of the back tube heat exchanger 2 located on the windward side of the main heat exchanger 1, and the refrigerant flowing out of the fourth heat exchange tube 21 is divided into multiple flow paths and flows to the first heat exchange tube 111 of the front heat exchanger 11, the second heat exchange tube 121 of the middle heat exchanger 12 and the third heat exchange tube 131 of the rear heat exchanger 13 at the same time, so that the heat exchange pipeline of the heat exchanger assembly 100 is more reasonable, thereby effectively improving the heat exchange efficiency of the heat exchanger assembly 100, reducing the energy consumption of the heat exchanger assembly 100, and improving energy efficiency.

At the same time, the refrigerant flowing out through the fourth heat exchange tube 21 is divided into multiple flow paths and flows to the first heat exchange tube 111, the second heat exchange tube 121 and the third heat exchange tube 131 at the same time, so that the heat exchange efficiency of the main heat exchanger 1 can be increased while the length of the main heat exchanger 1 remains unchanged, thereby increasing the heat exchange efficiency of the heat exchanger assembly 100. The heat exchanger assembly 100 is small in size and requires a small installation space.

The smaller the diameter of the heat exchange tube, the greater the resistance and pressure loss during the flow of the refrigerant, and the worse the applicability. The refrigerant flowing out through the fourth heat exchange tube 21 is divided into multiple flow paths and flows to the first heat exchange tube 111, the second heat exchange tube 121 and the third heat exchange tube 131 at the same time, which can effectively reduce the pressure loss during the flow of the refrigerant. Therefore, the applicability of heat exchange tubes with smaller diameters can be improved, thereby reducing the manufacturing cost. For example, in the present application, the first heat exchange tube 111, the second heat exchange tube 121 and the third heat exchange tube 131 can all use small-diameter heat exchange tubes, and further improve the heat exchange efficiency and heat exchange performance of the heat exchanger assembly 100, simplify the design of the flow path of the heat exchanger assembly 100, and reduce the production difficulty of the main heat exchanger 1. In addition, under the premise of the same heat exchange capacity, the volume of the heat exchanger assembly 100 can be relatively reduced, which is conducive to the miniaturization of the air conditioner indoor unit.

According to the heat exchanger assembly 100 of the embodiment of the present application, a main heat exchanger 1 and a back-tube heat exchanger 2 arranged on the windward side of the main heat exchanger 1 are arranged. The main heat exchanger 1 includes a front heat exchanger 11, a middle heat exchanger 12 and a rear heat exchanger 13 which are spliced in sequence. The front heat exchanger 11 has a first heat exchange tube 111, the middle heat exchanger 12 has a second heat exchange tube 121, the rear heat exchanger 13 has a third heat exchange tube 131, and the back-tube heat exchanger 2 has a fourth heat exchange tube 21. When the heat exchanger assembly 100 is cooling, the refrigerant flowing out of the back-tube heat exchanger 2 is divided into multiple flow paths and flows to the front heat exchanger 11, the middle heat exchanger 12 and the rear heat exchanger 13 at the same time, so that the heat exchange pipeline of the heat exchanger assembly 100 is more reasonable, thereby effectively improving the heat exchange efficiency of the heat exchanger assembly 100, reducing the energy consumption of the heat exchanger assembly 100, and improving the energy efficiency of the heat exchanger assembly 100. At the same time, the small-diameter heat exchange tube has good applicability and high heat exchange efficiency. Under the premise of the same heat exchange capacity, the volume of the heat exchanger assembly 100 can be relatively reduced, which is conducive to the miniaturization of the air-conditioning indoor unit.

In some embodiments of the present application, the flow path of the heat exchanger assembly 100 includes an input flow path 3, a first flow path 4, a second flow path 5 and a third flow path 6. The input flow path 3 flows through the fourth heat exchange tube 21 of the back tube heat exchanger 2, the first flow path 4 flows through the first heat exchange tube 111 of the front heat exchanger 11 and part of the second heat exchange tube 121 of the middle heat exchanger 12, the second flow path 5 flows through the remaining part of the second heat exchange tube 121 of the middle heat exchanger 12, and the third flow path 6 flows through the third heat exchange tube 131 of the rear heat exchanger 13. When the heat exchanger assembly 100 is cooling, the refrigerant flows through the input flow path 3 and then is simultaneously diverted into the first flow path 4, the second flow path 5 and the third flow path 6.

It is understandable that, since the back-tube heat exchanger 2 is arranged on the windward side of the main heat exchanger 1, when the heat exchanger assembly 100 is cooling, the refrigerant flows from the back-tube heat exchanger 2 to the main heat exchanger 1, thereby improving the heat exchange efficiency of the heat exchanger assembly 100. Specifically, the refrigerant first flows into the input flow path 3 of the back-tube heat exchanger 2, and the refrigerant flowing out of the input flow path 3 is simultaneously divided into the first flow path 4, the second flow path 5 and the third flow path 6, so that the heat exchange pipeline of the heat exchanger assembly 100 is more reasonable, thereby effectively improving the heat exchange efficiency of the heat exchanger assembly 100, reducing the energy consumption of the heat exchanger assembly 100, and improving the energy efficiency of the heat exchanger assembly 100. At the same time, the refrigerant flowing out through the input flow path 3 is divided into the first flow path 4, the second flow path 5 and the third flow path 6, which effectively reduces the pressure loss during the flow of the refrigerant, thereby further improving the high heat exchange efficiency and heat exchange performance of the heat exchanger assembly 100, thereby further weakening the defects of using small-diameter heat exchange tubes and improving the applicability of small-diameter heat exchange tubes.

In addition, the flow path of the heat exchanger assembly 100 also includes an output flow path 7 . When the heat exchanger assembly 100 is cooling, the refrigerants flowing out of the first flow path 4 , the second flow path 5 , and the third flow path 6 merge and flow out through the output flow path 7 .

When the heat exchanger assembly 100 is heating, the refrigerant first flows into the output flow path 7, and flows from the output flow path 7 to the first flow path 4, the second flow path 5 and the third flow path 6 at the same time. The refrigerant flowing out of the first flow path 4, the second flow path 5 and the third flow path 6 merges and flows out through the input flow path 3. At the same time, the fourth heat exchange tube 21 of the back tube heat exchanger 2 participates in heat exchange when the heat exchanger assembly 100 is cooling, and becomes an extension of the supercooling section when the heat exchanger assembly 100 is heating, further improving energy efficiency, thereby further weakening the defects of using small-diameter heat exchange tubes and improving the applicability of small-diameter heat exchange tubes.

In some embodiments of the present application, the input flow path 3 is connected to the first flow path 4, the second flow path 5 and the third flow path 6 through the distributor 40. Thus, the refrigerant in the input flow path 3 can be collected and divided into three paths through the distributor 40 and flow into the first flow path 4, the second flow path 5 and the third flow path 6 respectively.

In some embodiments of the present application, the middle heat exchanger 12 includes a first area 141 and a second area 142, the first area 141 is located on the side of the second area 142 close to the front heat exchanger 11, the first flow path 4 flows through the second heat exchange tube 121 of the first area 141, and the second flow path 5 flows through the second heat exchange tube 121 of the second area 142. Thus, the middle heat exchanger 12 is divided into two areas through such a setting, which facilitates the arrangement of the first flow path 4 and the second flow path 5 in the middle heat exchanger 12.

The first flow path 4 flows through the second heat exchange tube 121 of the first region 141 and the first heat exchange tube 111 of the front heat exchanger 11. The first region 141 is located on the side of the second region 142 close to the front heat exchanger 11, which facilitates the connection between the first heat exchange tube 111 and the second heat exchange tube 121 on the first flow path 4. The second flow path 5 flows through the second heat exchange tube 121 of the second region 142. Therefore, the heat exchange efficiency of the first flow path 4 and the second flow path 5 is improved through such an arrangement, and the flow rate and pressure loss of the branch are reduced, thereby improving the heat exchange performance of the heat exchange component as a whole.

In some embodiments of the present application, the first heat exchange tube 111 includes a first heat exchange tube 111 on the windward side and a first heat exchange tube 111 on the leeward side, which facilitates the arrangement of the first heat exchange tube 111 in the front heat exchanger 11 and the setting of the first flow path 4. The second heat exchange tube 121 includes a second heat exchange tube 121 on the windward side and a second heat exchange tube 121 on the leeward side, which facilitates the arrangement of the second heat exchange tube 121 in the middle heat exchanger 12 and the setting of the first flow path 4 and the second flow path 5, and can improve the energy efficiency of the heat exchanger assembly 100.

Furthermore, the first flow path 4 flows through the second heat exchange tube 121 on the windward side of the middle heat exchanger 12, the first heat exchange tube 111 on the windward side of the front heat exchanger 11, the first heat exchange tube 111 on the leeward side of the front heat exchanger 11 and the second heat exchange tube 121 on the leeward side of the middle heat exchanger 12 in sequence.

Therefore, through such a setting, the first flow path 4 needs to flow through all the second heat exchange tubes 121 on the windward side of the first area 141 of the middle heat exchanger 12 and all the first heat exchange tubes 111 on the windward side of the front heat exchanger 11 before it can flow to the first heat exchange tubes 111 on the leeward side of the front heat exchanger 11 and the second heat exchange tubes 121 on the leeward side of the first area 141 of the middle heat exchanger 12 in sequence, thereby improving the heat exchange efficiency of the first flow path 4, and further improving the energy efficiency of the heat exchanger assembly 100. At the same time, when the heat exchanger assembly 100 is used in the indoor unit of the air conditioner, since the middle heat exchanger 12 is close to the air inlet 20 so that the air flow velocity near the middle heat exchanger 12 is greater than that of the front heat exchanger 11, thus, by setting the first flow path 4 to first flow through the second heat exchange tubes 121 on the windward side of the first area 141 of the middle heat exchanger 12, the heat exchange efficiency of the first flow path 4 is further improved, and further improving the heat exchange efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, the second heat exchange tube 121 includes a second heat exchange tube 121 on the windward side and a second heat exchange tube 121 on the leeward side, and the second flow path 5 flows through the second heat exchange tube 121 on the windward side of the middle heat exchanger 12 and the second heat exchange tube 121 on the leeward side of the middle heat exchanger 12 in sequence. Therefore, through such an arrangement, the second flow path 5 needs to flow through all the second heat exchange tubes 121 on the windward side of the second area 142 of the middle heat exchanger 12 before flowing to the second heat exchange tube 121 on the leeward side of the second area 142 of the middle heat exchanger 12, thereby improving the heat exchange efficiency of the second flow path 5, and further improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIG. 2 to FIG. 6, the second heat exchange tube 121 includes the second heat exchange tube 121 on the windward side and the second heat exchange tube 121 on the leeward side, and the middle heat exchanger 12 includes the first area 141 and the second area 142, the first area 141 includes part of the second heat exchange tube 121 on the windward side and part of the second heat exchange tube 121 on the leeward side, and the second area 142 includes the rest of the second heat exchange tube 121 on the windward side and the rest of the second heat exchange tube 121 on the leeward side. Thus, the middle heat exchanger 12 is divided into two areas by such a setting, which facilitates the arrangement of the first flow path 4 and the second flow path 5 in the middle heat exchanger 12.

The first flow path 4 flows through the second heat exchange tube 121 of the first region 141 and the first heat exchange tube 111 of the front heat exchanger 11, and the second flow path 5 flows through the second heat exchange tube 121 of the second region 142. Thus, the heat exchange efficiency of the first flow path 4 and the second flow path 5 is improved through such an arrangement, and the flow rate and pressure loss of the branch are reduced, thereby improving the heat exchange performance of the heat exchange component as a whole.

Furthermore, the middle heat exchanger 12 has two rows of heat exchange tubes, namely, a row of second heat exchange tubes 121 close to the windward side and a row of second heat exchange tubes 121 close to the leeward side. Thus, the middle heat exchanger 12 is divided into two areas, and the first flow path 4 and the second flow path 5 are arranged conveniently, and the energy efficiency of the air conditioner can be improved.

In some embodiments of the present application, as shown in Figures 2 to 6, the first heat exchange tube 111 includes a first heat exchange tube 111 on the windward side and a first heat exchange tube 111 on the leeward side, and the first flow path 4 flows through the second heat exchange tube 121 on the windward side of the first region 141, the first heat exchange tube 111 on the windward side of the front heat exchanger 11, the first heat exchange tube 111 on the leeward side of the front heat exchanger 11, and the second heat exchange tube 121 on the leeward side of the first region 141 in sequence.

Therefore, through such a setting, the first flow path 4 needs to flow through all the second heat exchange tubes 121 on the windward side of the first area 141 of the middle heat exchanger 12 and all the first heat exchange tubes 111 on the windward side of the front heat exchanger 11 before it can flow to the first heat exchange tubes 111 on the leeward side of the front heat exchanger 11 and the second heat exchange tubes 121 on the leeward side of the first area 141 of the middle heat exchanger 12 in sequence, thereby improving the heat exchange efficiency of the first flow path 4, and further improving the energy efficiency of the heat exchanger assembly 100. At the same time, when the heat exchanger assembly 100 is used in the indoor unit of the air conditioner, since the middle heat exchanger 12 is close to the air inlet, the air flow velocity near the middle heat exchanger 12 is greater than that of the front heat exchanger 11. Therefore, by setting the first flow path 4 to first flow through the second heat exchange tubes 121 on the windward side of the first area 141 of the middle heat exchanger 12, the heat exchange efficiency of the first flow path 4 is further improved, and further improving the heat exchange efficiency of the heat exchanger assembly 100.

Furthermore, the front heat exchanger 11 has two rows of heat exchange tubes, namely a row of first heat exchange tubes 111 close to the windward side and a row of first heat exchange tubes 111 close to the leeward side. This facilitates the arrangement of the first heat exchange tubes 111 in the front heat exchanger 11 and the setting of the first flow path 4, while improving the energy efficiency of the air conditioner.

In some embodiments of the present application, as shown in FIG3 and FIG6 , the second flow path 5 flows from the second heat exchange tube 121 on the windward side of the second region 142 to the second heat exchange tube 121 on the leeward side of the second region 142. Thus, through such an arrangement, the second flow path 5 needs to flow through all the second heat exchange tubes 121 on the windward side of the second region 142 of the middle heat exchanger 12 before flowing to the second heat exchange tube 121 on the leeward side of the second region 142 of the middle heat exchanger 12, thereby improving the heat exchange efficiency of the second flow path 5, and further improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIG3 and FIG4, the first region 141 is located on the side of the second region 142 close to the front heat exchanger 11. It can be understood that since the first flow path 4 flows through the second heat exchange tube 121 of the first region 141 and the first heat exchange tube 111 of the front heat exchanger 11, such a setting simplifies the arrangement of the first flow path 4 in the middle heat exchanger 12, facilitates the setting of the first flow path 4, reduces the loss of the refrigerant, and reduces the energy consumption of the heat exchanger assembly 100.

At the same time, by dividing the first area 141 and the second area 142, while ensuring the uniformity of heat exchange among the first flow path 4, the second flow path 5 and the third flow path 6, it is ensured that the first flow path 4 first flows through the second heat exchange tube 121 on the windward side of the first area 141, the second flow path 5 first flows through the second heat exchange tube 121 on the windward side of the second area 142, and the third flow path 6 first flows through the third heat exchange tube 131 on the windward side of the rear heat exchanger 13. Therefore, during cooling, the heat exchange tubes to which the input flow path 3 is simultaneously diverted are all located on the windward side, thereby further improving the efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in Figures 1-3 and 6, the third heat exchange tube 131 includes a third heat exchange tube 131 on the windward side and a third heat exchange tube 131 on the leeward side. This facilitates the arrangement of the third heat exchange tube 131 in the rear heat exchanger 13 and the setting of the third flow path 6, while improving the energy efficiency of the heat exchanger assembly 100.

Further, the third flow path 6 flows from the third heat exchange tube 131 on the windward side of the rear heat exchanger 13 to the third heat exchange tube 131 on the leeward side of the rear heat exchanger 13. It can be understood that, according to the arrangement of the wind field, the airflow on the windward side flows faster, and the airflow on the leeward side flows relatively slowly. When the temperature difference between the refrigerant and the airflow is greater in a place where the airflow flows faster than in a place where the airflow flows slower, the heat exchange efficiency of the heat exchanger assembly 100 is better. Therefore, following the refrigerant flowing from the part of the heat exchanger assembly 100 close to the windward side to the part of the heat exchanger assembly 100 away from the leeward side, the heat exchange efficiency of the heat exchanger assembly 100 can be better.

Therefore, through such an arrangement, the third flow path 6 needs to flow through all the third heat exchange tubes 131 on the windward side of the rear heat exchanger 13 before it can flow to the third heat exchange tubes 131 on the leeward side of the rear heat exchanger 13, thereby improving the heat exchange efficiency of the third flow path 6 and further improving the energy efficiency of the heat exchanger assembly 100.

Furthermore, the rear heat exchanger 13 has two rows of heat exchange tubes, namely a row of third heat exchange tubes 131 close to the windward side and a row of third heat exchange tubes 131 close to the leeward side. This facilitates the arrangement of the third heat exchange tubes 131 in the rear heat exchanger 13 and the setting of the third flow path 6, while improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIG. 1 and FIG. 2 , the number of heat exchange tubes in the first flow path 4 is greater than the number of heat exchange tubes in the third flow path 6, and the number of heat exchange tubes in the third flow path 6 is greater than the number of heat exchange tubes in the second flow path 5. 5 and the third flow path 6, thereby improving the heat exchange uniformity of the heat exchanger assembly 100 and reducing energy consumption.

For example, as shown in FIG1 , when the heat exchanger assembly 100 is used in an indoor unit of an air conditioner, there are a total of 5 first heat exchange tubes 111 participating in heat exchange in the front heat exchanger 11, a total of 9 second heat exchange tubes 121 participating in heat exchange in the middle heat exchanger 12, and a total of 7 third heat exchange tubes 131 participating in heat exchange in the rear heat exchanger 13. Among them, the first flow path 4 flows through 5 first heat exchange tubes 111 and 3 second heat exchange tubes 121, the second flow path 5 flows through 6 second heat exchange tubes 121, and the third flow path 6 flows through 7 third heat exchange tubes 131. The middle heat exchanger 12 is closer to the air inlet 20 than the rear heat exchanger 13, and the rear heat exchanger 13 is closer to the air inlet 20 than the front heat exchanger 11. The air flow velocity near the middle heat exchanger 12 is greater than that of the rear heat exchanger 13, and the air flow velocity near the rear heat exchanger 13 is greater than that of the front heat exchanger 11. Therefore, the number of heat exchange tubes passing through the first flow path 4 is greater than the number of heat exchange tubes in the third flow path 6, and the number of heat exchange tubes in the third flow path 6 is greater than the number of heat exchange tubes in the second flow path 5. The heat exchange uniformity of the first flow path 4, the second flow path 5 and the third flow path 6 can be guaranteed as much as possible, the heat exchange efficiency of the heat exchanger assembly 100 is improved, and the energy consumption is reduced.

In some embodiments of the present application, as shown in FIG. 7 to FIG. 12, the heat exchange flow path of the heat exchanger assembly 100 includes an input flow path 3, a first flow path 4, a second flow path 5, a third flow path 6, and a fourth flow path 8. The input flow path 3 flows through the fourth heat exchange tube 21 of the back tube heat exchanger 2, the first flow path 4 flows through the first heat exchange tube 111 of the front heat exchanger 11, the second flow path 5 flows through part of the second heat exchange tube 121 of the middle heat exchanger 12, the third flow path 6 flows through part of the second heat exchange tube 121 of the middle heat exchanger 12 and part of the third heat exchange tube 131 of the rear heat exchanger 13, and the fourth flow path 8 flows through the remaining part of the third heat exchange tube 131 of the rear heat exchanger 13 and the remaining part of the second heat exchange tube 121 of the middle heat exchanger 12. When the heat exchanger assembly 100 is refrigerating, the refrigerant flows through the input flow path 3 and then is divided into the first flow path 4, the second flow path 5, the third flow path 6, and the fourth flow path 8 at the same time.

It is understandable that, since the back-tube heat exchanger 2 is arranged on the windward side of the main heat exchanger 1, when the heat exchanger assembly 100 is cooling, the refrigerant flows from the back-tube heat exchanger 2 to the main heat exchanger 1, thereby improving the heat exchange efficiency of the heat exchanger assembly 100. Specifically, the refrigerant first flows into the input flow path 3 of the back-tube heat exchanger 2, and the refrigerant flowing out of the input flow path 3 is simultaneously divided into the first flow path 4, the second flow path 5, the third flow path 6 and the fourth flow path 8, so that the heat exchange pipeline of the heat exchanger assembly 100 is more reasonable, thereby effectively improving the heat exchange efficiency of the heat exchanger assembly 100, reducing the energy consumption of the heat exchanger assembly 100, and improving the energy efficiency of the heat exchanger assembly 100. At the same time, the refrigerant flowing out through the input flow path 3 is divided into a first flow path 4, a second flow path 5, a third flow path 6 and a fourth flow path 8, which effectively reduces the pressure loss during the flow of the refrigerant and increases the heat exchange efficiency of the main heat exchanger 1 while keeping the length of the main heat exchanger 1 unchanged, thereby further improving the heat exchange efficiency and heat exchange performance of the heat exchanger assembly 100, and achieving a small volume of the heat exchanger assembly 100 of the present application under the same energy efficiency, thereby reducing the installation space required for the heat exchanger assembly 100.

Furthermore, the flow path of the heat exchanger assembly 100 also includes an output flow path 7. When the heat exchanger assembly 100 is cooling, the refrigerants flowing out of the first flow path 4, the second flow path 5, the third flow path 6 and the fourth flow path 8 merge and flow out through the output flow path 7.

When the heat exchanger assembly 100 is heating, the refrigerant first flows into the output flow path 7, and simultaneously flows from the output flow path 7 to the first flow path 4, the second flow path 5, the third flow path 6 and the fourth flow path 8. The refrigerant flowing out of the first flow path 4, the second flow path 5, the third flow path 6 and the fourth flow path 8 converge and then flow out through the input flow path 3.

At the same time, the fourth heat exchange tube 21 of the back-tube heat exchanger 2 participates in heat exchange when the heat exchanger assembly 100 is cooling, and becomes an extension of the supercooling section when the heat exchanger assembly 100 is heating, further improving energy efficiency.

Furthermore, a windshield is also connected between the windward sides of the middle heat exchanger 12 and the rear heat exchanger 13; for example, but not limited to, the two ends of the windshield are respectively fitted on the middle heat exchanger 12 and the rear heat exchanger 13 through sponges, so as to ensure the sealing of the contact part between the windshield and the heat exchanger while realizing the connection between the windshield and the heat exchanger. At the same time, the sponge fitting method is also conducive to the user to disassemble the windshield when the heat exchanger assembly 100 needs to be repaired or replaced; of course, in other embodiments, the windshield can also be installed on the middle heat exchanger 12 and the rear heat exchanger 13 by screw locking, and the present design is not limited to this. In addition, if there is a large gap between the front heat exchanger 11 and the middle heat exchanger 12, a windshield can also be added between the two to avoid air leakage of the heat exchanger assembly 100.

When the heat exchanger assembly 100 is applied to the indoor unit of the air conditioner, the indoor unit of the air conditioner includes a shell, a wind wheel and a heat exchanger assembly 100. Among them, the shell has an air inlet and an air outlet, the air inlet is arranged on the upper side of the shell, the air outlet is arranged on the lower side of the shell, the wind wheel is arranged in the shell, and the heat exchanger assembly 100 is arranged in the shell and is located on the air inlet side of the wind wheel. It can be understood that the wind wheel drives the air flow from the air inlet to the air outlet, and the heat exchanger assembly 100 is arranged upstream of the wind wheel. Therefore, the side of the main heat exchanger 1 away from the wind wheel is the windward side, and the side of the main heat exchanger 1 close to the wind wheel is the leeward side. When the indoor unit of the air conditioner is working, the motor drives the wind wheel to rotate. Under the action of the wind wheel, the air flow is driven to flow from the air inlet to the air outlet. After the air flow enters the air inlet, it exchanges heat with the heat exchanger assembly 100. The air flow after heat exchange flows to the air outlet under the action of the wind wheel, thereby exchanging heat with the air sucked by the wind wheel to achieve the cooling or heating effect of the indoor unit of the air conditioner.

At the same time, due to space limitations, the length of the middle heat exchanger 12 is greater than the length of the rear heat exchanger 13, which is greater than the length of the front heat exchanger 11. The first flow path 4 flows through the first heat exchange tube 111 of the front heat exchanger 11, the second flow path 5 flows through part of the second heat exchange tube 121 of the middle heat exchanger 12, the third flow path 6 flows through part of the second heat exchange tube 121 of the middle heat exchanger 12 and part of the third heat exchange tube 131 of the rear heat exchanger 13, and the fourth flow path 8 flows through the remaining part of the third heat exchange tube 131 of the rear heat exchanger 13 and the remaining part of the second heat exchange tube 121 of the middle heat exchanger 12, so as to ensure the heat exchange uniformity of the first flow path 4, the second flow path 5, the third flow path 6 and the fourth flow path 8 as much as possible, and further improve the heat exchange efficiency of the heat exchanger assembly 100.

It should be noted that the air conditioner indoor unit may be an indoor unit of a wall-mounted split air conditioner or an indoor unit or indoor unit of other air conditioners, and the wind wheel may be a cross-flow wind wheel, an axial flow wind wheel or other wind wheels.

In some embodiments of the present application, the input flow path 3 is connected to the first flow path 4, the second flow path 5, the third flow path 6 and the fourth flow path 8 through a distributor 50. Thus, the refrigerant in the input flow path 3 can be collected and divided into four paths through the distributor 50 and flow into the first flow path 4, the second flow path 5, the third flow path 6 and the fourth flow path 8 respectively.

In some embodiments of the present application, as shown in Figures 8 and 9, the first heat exchange tube 111 includes a first heat exchange tube 111 on the windward side and a first heat exchange tube 111 on the leeward side, and the first flow path 4 flows from the first heat exchange tube 111 on the windward side of the front heat exchanger 11 to the first heat exchange tube 111 on the leeward side of the front heat exchanger 11.

It is understandable that, according to the arrangement of the wind field, the airflow on the windward side flows faster, and the airflow on the leeward side flows relatively slower. When the temperature difference between the refrigerant and the airflow is greater in a place where the airflow flows faster than in a place where the airflow flows slower, the heat exchange efficiency of the heat exchanger assembly 100 is better. Therefore, following the refrigerant flowing from the heat exchange tube close to the windward side to the heat exchange tube on the leeward side, the heat exchange efficiency of the heat exchanger assembly 100 can be better.

Therefore, through such an arrangement, the first flow path 4 needs to flow through all the first heat exchange tubes 111 on the windward side of the front heat exchanger 11 before it can flow to the first heat exchange tubes 111 on the leeward side of the front heat exchanger 11, thereby improving the heat exchange efficiency of the first flow path 4 and further improving the energy efficiency of the heat exchanger assembly 100.

Furthermore, the front heat exchanger 11 has two rows of heat exchange tubes, namely, a row of first heat exchange tubes 111 close to the windward side and a row of first heat exchange tubes 111 close to the leeward side. This facilitates the arrangement of the first heat exchange tubes 111 in the front heat exchanger 11 and the setting of the first flow path 4, while improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIG. 8 and FIG. 10 to FIG. 12, the second heat exchange tube 121 includes the second heat exchange tube 121 on the windward side and the second heat exchange tube 121 on the leeward side, the middle heat exchanger 12 includes a third area 143, a fourth area 144 and a fifth area 145, the third area 143 includes part of the second heat exchange tube 121 on the windward side and part of the second heat exchange tube 121 on the leeward side, the fourth area 144 includes the rest of the second heat exchange tube 121 on the windward side and part of the second heat exchange tube 121 on the leeward side 21, the fifth area 145 includes the second heat exchange tube 121 of the remaining part of the leeward side, the third heat exchange tube 131 includes the third heat exchange tube 131 on the windward side and the third heat exchange tube 131 on the leeward side, the rear heat exchanger 13 includes the sixth area 146 and the seventh area 147, the sixth area 146 includes part of the third heat exchange tube 131 on the windward side and part of the third heat exchange tube 131 on the leeward side, and the seventh area 147 includes the third heat exchange tube 131 of the remaining part of the windward side and the third heat exchange tube 131 of the remaining part of the leeward side. Thus, by such a setting, the middle heat exchanger 12 is divided into three areas, and the rear heat exchanger 13 is divided into two areas, which facilitates the arrangement of the second flow path 5, the third flow path 6 and the fourth flow path 8 in the middle heat exchanger 12, and the arrangement of the third flow path 6 and the fourth flow path 8 in the rear heat exchanger 13.

The second flow path 5 flows through the second heat exchange tube 121 of the third region 143, the third flow path 6 flows through the second heat exchange tube 121 of the fourth region 144 and the third heat exchange tube 131 of the sixth region 146, and the fourth flow path 8 flows through the second heat exchange tube 121 of the fifth region 145 and the third heat exchange tube 131 of the seventh region 147. Thus, the heat exchange efficiency of the second flow path 5, the third flow path 6 and the fourth flow path 8 is improved through such an arrangement, and the flow velocity and pressure loss of the branch are reduced, thereby improving the heat exchange performance of the heat exchange component as a whole.

Furthermore, the middle heat exchanger 12 has two rows of heat exchange tubes, namely, a row of second heat exchange tubes 121 close to the windward side and a row of second heat exchange tubes 121 close to the leeward side, and the rear heat exchanger 13 has two rows of heat exchange tubes, namely, a row of third heat exchange tubes 131 close to the windward side and a row of third heat exchange tubes 131 close to the leeward side. Thus, the middle heat exchanger 12 is conveniently divided into three areas, the rear heat exchanger 13 is conveniently divided into two areas, and the second flow path 5, the third flow path 6 and the fourth flow path 8 are conveniently arranged, and the energy efficiency of the air conditioner can be improved at the same time.

In some embodiments of the present application, as shown in FIG8 and FIG10, the second flow path 5 flows from the second heat exchange tube 121 on the windward side of the third region 143 to the second heat exchange tube 121 on the leeward side of the third region 143. Therefore, through such an arrangement, the second flow path 5 needs to flow through all the second heat exchange tubes 121 on the windward side of the third region 143 of the middle heat exchanger 12 before flowing to the second heat exchange tube 121 on the leeward side of the third region 143 of the middle heat exchanger 12, thereby improving the heat exchange efficiency of the second flow path 5, and further improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIG8 and FIG11, the third flow path 6 sequentially flows through the second heat exchange tube 121 on the windward side of the fourth region 144, the third heat exchange tube 131 on the windward side of the sixth region 146, the third heat exchange tube 131 on the leeward side of the sixth region 146, and the second heat exchange tube 121 on the leeward side of the fourth region 144. Therefore, through such an arrangement, the third flow path 6 needs to flow through all the second heat exchange tubes 121 on the windward side of the fourth region 144 of the middle heat exchanger 12 and all the third heat exchange tubes 131 on the windward side of the sixth region 146 of the rear heat exchanger 13 before it can sequentially flow to the third heat exchange tube 131 on the leeward side of the sixth region 146 of the rear heat exchanger 13 and the second heat exchange tube 121 on the leeward side of the fourth region 144 of the middle heat exchanger 12, thereby improving the heat exchange efficiency of the third flow path 6, and further improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIG8 and FIG12, the fourth flow path 8 sequentially flows through the third heat exchange tube 131 on the windward side of the seventh region 147, the third heat exchange tube 131 on the leeward side of the seventh region 147, and the second heat exchange tube 121 on the leeward side of the fifth region 145. Therefore, through such an arrangement, the fourth flow path 8 needs to flow through all the third heat exchange tubes 131 on the windward side of the seventh region 147 of the rear heat exchanger 13 before it can sequentially flow to the third heat exchange tube 131 on the leeward side of the seventh region 147 of the rear heat exchanger 13 and the second heat exchange tube 121 on the leeward side of the fifth region 145 of the middle heat exchanger 12, thereby improving the heat exchange efficiency of the fourth flow path 8, and further improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIG. 10 to FIG. 12, the third area 143 is located on the side of the fourth area 144 close to the front heat exchanger 11, along the length direction of the middle heat exchanger 12, the fifth area 145 is located between the third area 143 and the fourth area 144, and the sixth area 146 is located on the side of the seventh area 147 close to the middle heat exchanger 12. It can be understood that since the third flow path 6 flows through the second heat exchange tube 121 of the fourth area 144 and the third heat exchange tube 131 of the sixth area 146, and the fourth flow path 8 flows through the second heat exchange tube 121 of the fifth area 145 and the third heat exchange tube 131 of the seventh area 147, such a setting simplifies the arrangement of the third flow path 6 and the fourth flow path 8 in the middle heat exchanger 12 and the rear heat exchanger 13, facilitates the setting of the third flow path 6 and the fourth flow path 8, reduces the loss of refrigerant, and reduces the energy consumption of the heat exchanger assembly 100.

At the same time, by dividing the third area 143, the fourth area 144 and the fifth area 145, while ensuring the uniformity of heat exchange of the first flow path 4, the second flow path 5, the third flow path 6 and the fourth flow path 8, it is ensured that the second flow path 5 first flows through the second heat exchange tube 121 on the windward side of the third area 143, the third flow path 6 first flows through the second heat exchange tube 121 on the windward side of the fourth area 144, and the fourth flow path 8 first flows through the third heat exchange tube 131 on the windward side of the seventh area 147. Therefore, during cooling, the heat exchange tubes to which the input flow path 3 is simultaneously diverted are all located on the windward side, thereby further improving the efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in Figures 7 to 12, the number of heat exchange tubes in the first flow path 4, the second flow path 5, the third flow path 6, and the fourth flow path 8 is the same. Therefore, by such an arrangement, the heat exchange uniformity of the first flow path 4, the second flow path 5, the third flow path 6, and the fourth flow path 8 is ensured, the heat exchange efficiency of the heat exchanger assembly 100 is improved, and the energy consumption is reduced.

For example, as shown in FIG7 and FIG8, there are a total of 5 first heat exchange tubes 111 involved in heat exchange in the front heat exchanger 11, a total of 8 second heat exchange tubes 121 involved in heat exchange in the middle heat exchanger 12, and a total of 7 third heat exchange tubes 131 involved in heat exchange in the rear heat exchanger 13. Among them, the first flow path 4 flows through 5 first heat exchange tubes 111, the second flow path 5 flows through 5 second heat exchange tubes 121, the third flow path 6 flows through 2 second heat exchange tubes 121 and 3 third heat exchange tubes 131, and the fourth flow path 8 flows through 4 third heat exchange tubes 131 and 1 second heat exchange tube 121, so that the number of heat exchange tubes in the first flow path 4, the second flow path 5, the third flow path 6 and the fourth flow path 8 is the same.

In some embodiments of the present application, as shown in FIGS. 13 to 19 , the heat exchange flow path of the heat exchanger assembly 100 includes an input flow path 3, a first flow path 4, a second flow path 5, a third flow path 6, a fourth flow path 8, and a fifth flow path 9. The input flow path 3 flows through the fourth heat exchange tube 21 of the back-tube heat exchanger 2, the first flow path 4 flows through a portion of the first heat exchange tube 111 of the front heat exchanger 11, and the second flow path 5 flows through the remaining portion of the first heat exchange tube 111 of the front heat exchanger 11 and a portion of the second heat exchange tube 111 of the middle heat exchanger 12. Tube 121, the third flow path 6 flows through part of the second heat exchange tube 121 of the middle heat exchanger 12, the fourth flow path 8 flows through the remaining part of the second heat exchange tube 121 of the middle heat exchanger 12 and part of the third heat exchange tube 131 of the rear heat exchanger 13, and the fifth flow path 9 flows through the remaining part of the third heat exchange tube 131 of the rear heat exchanger 13. When the heat exchanger assembly 100 is cooling, the refrigerant flows through the input flow path 3 and then is divided into the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9 at the same time.

It is understandable that, since the back-tube heat exchanger 2 is arranged on the windward side of the main heat exchanger 1, when the heat exchanger assembly 100 is cooling, the refrigerant flows from the back-tube heat exchanger 2 to the main heat exchanger 1, thereby improving the heat exchange efficiency of the heat exchanger assembly 100. Specifically, the refrigerant first flows into the input flow path 3 of the back-tube heat exchanger 2, and the refrigerant flowing out of the input flow path 3 is simultaneously divided into the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9, so that the heat exchange pipeline of the heat exchanger assembly 100 is more reasonable, thereby effectively improving the heat exchange efficiency of the heat exchanger assembly 100, reducing the energy consumption of the heat exchanger assembly 100, and improving the heat exchange efficiency. At the same time, the refrigerant flowing out of the input flow path 3 is divided into the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9, thereby effectively reducing the pressure loss during the flow of the refrigerant, further improving the heat exchange efficiency and heat exchange performance of the heat exchanger assembly 100, simplifying the design of the flow path of the heat exchanger assembly 100, and reducing the production difficulty of the main heat exchanger 1.

Furthermore, the flow path of the heat exchanger assembly 100 also includes an output flow path 7. When the heat exchanger assembly 100 is cooling, the refrigerants flowing out of the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9 converge and flow out through the output flow path 7.

In some embodiments of the present application, the input flow path 3 is connected to the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9 through a distributor 50. Thus, the refrigerant in the input flow path 3 can be collected and divided into three paths through the distributor 50 and flow into the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9 respectively.

In some embodiments of the present application, as shown in FIGS. 14-19, the first heat exchange tube 111 includes the first heat exchange tube 111 on the windward side and the first heat exchange tube 111 on the leeward side, the second heat exchange tube 121 includes the second heat exchange tube 121 on the windward side and the second heat exchange tube 121 on the leeward side, the third heat exchange tube 131 includes the third heat exchange tube 131 on the windward side and the third heat exchange tube 131 on the leeward side, the front heat exchanger 11 includes an eighth region 148 and a ninth region 149, the eighth region 148 includes part of the first heat exchange tube 111 on the windward side and the first heat exchange tube 111 on the leeward side, the ninth region 149 includes the remaining part of the first heat exchange tube 111 on the windward side, and the middle heat exchanger 12 includes the tenth region 1410 and the eleventh region 1411. 1411 and the twelfth area 1412, the tenth area 1410 includes part of the second heat exchange tube 121 on the windward side and part of the second heat exchange tube 121 on the leeward side, the eleventh area 1411 includes part of the second heat exchange tube 121 on the windward side and the remaining part of the second heat exchange tube 121 on the leeward side, the twelfth area 1412 includes the remaining part of the second heat exchange tube 121 on the windward side, the rear heat exchanger 13 includes the thirteenth area 1413 and the fourteenth area 1414, the thirteenth area 1413 includes part of the third heat exchange tube 131 on the windward side and part of the third heat exchange tube 131 on the leeward side, and the fourteenth area 1414 includes the remaining part of the third heat exchange tube 131 on the windward side and the remaining part of the third heat exchange tube 131 on the leeward side.

Therefore, through such an arrangement, the front heat exchanger 11 is divided into two areas, the middle heat exchanger 12 is divided into three areas, and the rear heat exchanger 13 is divided into two areas, so as to facilitate the arrangement of the first flow path 4 in the front heat exchanger 11, the second flow path 5 in the front heat exchanger 11 and the middle heat exchanger 12, the third flow path 6 in the middle heat exchanger 12, the fourth flow path 8 in the middle heat exchanger 12 and the rear heat exchanger 13, and the fifth flow path 9 in the rear heat exchanger 13.

The first flow path 4 flows through the first heat exchange tube 111 of the eighth region 148, the second flow path 5 flows through the first heat exchange tube 111 of the ninth region 149 and the second heat exchange tube 121 of the tenth region 1410, the third flow path 6 flows through the second heat exchange tube 121 of the eleventh region 1411, the fourth flow path 8 flows through the second heat exchange tube 121 of the twelfth region 1412 and the third heat exchange tube 131 of the thirteenth region 1413, and the fifth flow path 9 flows through the third heat exchange tube 131 of the fourteenth region 1414. Thus, the heat exchange efficiency of the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9 is improved through such an arrangement, and the flow rate and pressure loss of the branch are reduced, thereby improving the heat exchange performance of the heat exchange component as a whole.

Furthermore, the front heat exchanger 11 has two rows of heat exchange tubes, namely, a row of first heat exchange tubes 111 close to the windward side and a row of first heat exchange tubes 111 close to the leeward side, the middle heat exchanger 12 has two rows of heat exchange tubes, namely, a row of second heat exchange tubes 121 close to the windward side and a row of second heat exchange tubes 121 close to the leeward side, and the rear heat exchanger 13 has two rows of heat exchange tubes, namely, a row of third heat exchange tubes 131 close to the windward side and a row of third heat exchange tubes 131 close to the leeward side. Thus, it is convenient to divide the front heat exchanger 11 into two areas, the middle heat exchanger 12 into three areas, and the rear heat exchanger 13 into two areas, and it is convenient to set up the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9, and at the same time, the energy efficiency of the heat exchanger assembly 100 can be improved.

In some embodiments of the present application, as shown in FIGS. 14 and 15 , the first flow path 4 flows from the first heat exchange tube 111 on the windward side of the eighth region 148 to the first heat exchange tube 111 on the leeward side of the eighth region 148 .

It is understandable that, according to the arrangement of the wind field, the airflow on the windward side flows faster, and the airflow on the leeward side flows relatively slower. When the temperature difference between the refrigerant and the airflow is greater in a place where the airflow flows faster than in a place where the airflow flows slower, the heat exchange efficiency of the heat exchanger assembly 100 is better. Therefore, following the refrigerant flowing from the part of the heat exchanger assembly 100 close to the windward side to the part of the heat exchanger assembly 100 away from the leeward side, the heat exchange efficiency of the heat exchanger assembly 100 can be better.

Therefore, through such an arrangement, the first flow path 4 needs to flow through all the first heat exchange tubes 111 on the windward side of the eighth area 148 of the front heat exchanger 11 before it can flow to the first heat exchange tubes 111 on the leeward side of the eighth area 148 of the front heat exchanger 11, thereby improving the heat exchange efficiency of the first flow path 4 and further improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIG. 14 and FIG. 16 , the second flow path 5 flows sequentially through the first heat exchange tube 111 on the windward side of the ninth region 149, the second heat exchange tube 121 on the windward side of the tenth region 1410, and the second heat exchange tube 121 on the leeward side of the tenth region 1410. Thus, through such an arrangement, the second flow path 5 needs to flow through all the first heat exchange tubes 111 on the windward side of the ninth region 149 of the front heat exchanger 11 and all the second heat exchange tubes 121 on the windward side of the tenth region 1410 of the middle heat exchanger 12 before flowing to the second heat exchange tube 121 on the leeward side of the tenth region 1410 of the middle heat exchanger 12, thereby improving the heat exchange efficiency of the second flow path 5, and further improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIG. 14 and FIG. 17 , the third flow path 6 flows sequentially through the second heat exchange tube 121 on the windward side of the eleventh region 1411 and the second heat exchange tube 121 on the leeward side of the eleventh region 1411. Thus, through such an arrangement, the third flow path 6 needs to flow through all the second heat exchange tubes 121 on the windward side of the eleventh region 1411 of the middle heat exchanger 12 before flowing to the second heat exchange tube 121 on the leeward side of the eleventh region 1411 of the middle heat exchanger 12, thereby improving the heat exchange efficiency of the third flow path 6, and further improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIG. 14 and FIG. 18 , the fourth flow path 8 flows sequentially through the second heat exchange tube 121 on the windward side of the twelfth region 1412, the third heat exchange tube 131 on the windward side of the thirteenth region 1413, and the third heat exchange tube 131 on the leeward side of the thirteenth region 1413. Thus, through such an arrangement, the fourth flow path 8 needs to flow through all the second heat exchange tubes 121 on the windward side of the twelfth region 1412 of the middle heat exchanger 12 and all the third heat exchange tubes 131 on the windward side of the thirteenth region 1413 of the rear heat exchanger 13 before flowing to the third heat exchange tube 131 on the leeward side of the thirteenth region 1413 of the rear heat exchanger 13, thereby improving the heat exchange efficiency of the fourth flow path 8, and further improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIG. 14 and FIG. 19 , the fifth flow path 9 flows sequentially through the third heat exchange tube 131 on the windward side of the fourteenth region 1414 and the third heat exchange tube 131 on the leeward side of the fourteenth region 1414. Thus, through such an arrangement, the fifth flow path 9 needs to flow through all the third heat exchange tubes 131 on the windward side of the thirteenth region 1413 of the rear heat exchanger 13 before flowing to the third heat exchange tube 131 on the leeward side of the thirteenth region 1413 of the rear heat exchanger 13, thereby improving the heat exchange efficiency of the fifth flow path 9, and further improving the energy efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in FIGS. 14-19, the thirteenth region 1413 is located on the side of the fourteenth region 1414 close to the middle heat exchanger 12, the first heat exchange tube 111 on the windward side of the ninth region 149 is located on the side of the first heat exchange tube 111 on the windward side of the eighth region 148 close to the middle heat exchanger 12, and the second heat exchange tube 121 on the windward side of the tenth region 1410 is located on the side of the second heat exchange tube 121 on the windward side of the twelfth region 1412 close to the front heat exchanger 12. On one side of the middle heat exchanger 11, along the length direction of the middle heat exchanger 12, the second heat exchange tube 121 on the windward side of the twelfth area 1412 is located between the second heat exchange tube 121 on the windward side of the tenth area 1410 and the second heat exchange tube 121 on the windward side of the twelfth area 1412, and the second heat exchange tube 121 on the leeward side of the tenth area 1410 is located on the side of the second heat exchange tube 121 on the leeward side of the eleventh area 1411 close to the front heat exchanger 11.

It can be understood that since the second flow path 5 flows through the first heat exchange tube 111 of the ninth area 149 and the second heat exchange tube 121 of the tenth area 1410, the third flow path 6 flows through the second heat exchange tube 121 of the eleventh area 1411, and the fourth flow path 8 flows through the second heat exchange tube 121 of the twelfth area 1412 and the third heat exchange tube 131 of the thirteenth area 1413, such an arrangement simplifies the arrangement of the second flow path 5, the third flow path 6 and the fourth flow path 8 in the middle heat exchanger 12 and the rear heat exchanger 13, facilitates the arrangement of the second flow path 5, the third flow path 6 and the fourth flow path 8, reduces the loss of refrigerant, and reduces the energy consumption of the heat exchanger assembly 100.

At the same time, by dividing the eighth area 148 and the ninth area 149 of the front heat exchanger 11, the tenth area 1410, the eleventh area 1411 and the twelfth area 1412 of the middle heat exchanger 12, and the thirteenth area 1413 and the fourteenth area 1414 of the rear heat exchanger 13, while ensuring the heat exchange uniformity of the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9, it is ensured that the first flow path 4 first flows through the first heat exchange tube 111 on the windward side of the eighth area 148 of the front heat exchanger 11, and the second flow path 5 first flows through the first heat exchange tube 111 on the windward side of the eighth area 148 of the front heat exchanger 11. The flow passes through the first heat exchange tube 111 on the windward side of the ninth area 149 of the front heat exchanger 11, the third flow path 6 first flows through the second heat exchange tube 121 on the windward side of the tenth area 1410 of the middle heat exchanger 12, the fourth flow path 8 first flows through the second heat exchange tube 121 on the windward side of the eleventh area 1411 of the middle heat exchanger 12, and the fifth flow path 9 first flows through the third heat exchange tube 131 in the thirteenth area 1413 of the rear heat exchanger 13. Therefore, during cooling, the heat exchange tubes to which the input flow path 3 simultaneously diverts the flow are all located on the windward side, thereby further improving the efficiency of the heat exchanger assembly 100.

In some embodiments of the present application, as shown in Figures 13 to 19, the number of heat exchange tubes in the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9 is the same. Therefore, by such an arrangement, the heat exchange uniformity of the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9 is ensured, the heat exchange efficiency of the heat exchanger assembly 100 is improved, and the energy consumption is reduced.

For example, as shown in FIG13 and FIG14, there are a total of 5 first heat exchange tubes 111 involved in heat exchange in the front heat exchanger 11, a total of 8 second heat exchange tubes 121 involved in heat exchange in the middle heat exchanger 12, and a total of 7 third heat exchange tubes 131 involved in heat exchange in the rear heat exchanger 13. Among them, the first flow path 4 flows through 4 first heat exchange tubes 111, the second flow path 5 flows through 1 first heat exchange tube 111 and 3 second heat exchange tubes 121, the third flow path 6 flows through 4 second heat exchange tubes 121, the fourth flow path 8 flows through 1 second heat exchange tube 121 and 3 third heat exchange tubes 131, and the fifth flow path 9 flows through 4 third heat exchange tubes 131, so that the number of heat exchange tubes in the first flow path 4, the second flow path 5, the third flow path 6, the fourth flow path 8 and the fifth flow path 9 are the same.

In some embodiments of the present application, as shown in FIG. 1 and FIG. 2 , the back-tube heat exchanger 2 is disposed on the windward side of the middle heat exchanger 12. It is understandable that the airflow velocity near the middle heat exchanger 12 is greater than that of the front heat exchanger 11 and the rear heat exchanger 13. Therefore, the back-tube heat exchanger 2 is disposed on the windward side of the middle heat exchanger 12 to further improve the heat exchange efficiency of the back-tube heat exchanger 2, thereby improving the energy efficiency of the heat exchanger assembly 100. When the heat exchanger assembly 100 is applied to an indoor unit of an air conditioner, the housing has an air inlet 20 and an air outlet 30, and the middle heat exchanger 12 is closer to the air inlet 20 than the front heat exchanger 11 and the rear heat exchanger 13, so that the airflow velocity near the middle heat exchanger 12 is greater than that of the front heat exchanger 11 and the rear heat exchanger 13.

Furthermore, a connecting plate is provided between the back tube heat exchanger 2 and the middle heat exchanger 12, and the connecting plate is used to connect the back tube heat exchanger 2 and the middle heat exchanger 12 to ensure reliable connection between the two.

In some embodiments of the present application, as shown in FIG1 , a baffle 50 is provided on the windward side of the connection between the middle heat exchanger 12 and the rear heat exchanger 13, thereby preventing the air flow from entering the wind wheel through the gap at the connection between the middle heat exchanger 12 and the rear heat exchanger 13, thereby reducing the probability of the air flow entering the wind wheel without heat exchange through the heat exchanger assembly 100, thereby improving the heat exchange efficiency. In addition, if there is a large gap between the front heat exchanger 11 and the middle heat exchanger 12, a baffle 50 can also be added between the two to avoid air leakage from the heat exchanger assembly 100.

In some embodiments of the present application, seals are provided between the baffle 50 and the middle heat exchanger 12 and between the baffle 50 and the rear heat exchanger 13. Thus, the baffle 50 and the middle heat exchanger 12 and between the baffle 50 and the rear heat exchanger 13 can be effectively fitted, and the air flow can be prevented from flowing to the wind wheel from the gaps between the baffle 50 and the middle heat exchanger 12 and between the baffle 50 and the rear heat exchanger 13, thereby further reducing the probability of the air flow entering the wind wheel without heat exchange through the heat exchanger assembly 100, thereby improving the heat exchange efficiency.

For example, in the present application, the sealing member is a sponge member, and the two ends of the baffle 50 are respectively fitted and installed on the middle heat exchanger 12 and the rear heat exchanger 13 through the sponge, so as to ensure the sealing of the contact part between the baffle 50 and the heat exchanger while realizing the connection between the baffle 50 and the heat exchanger. At the same time, the sponge fitting method is also conducive to the user to disassemble the baffle 50 when the heat exchanger assembly 100 needs to be repaired or replaced; of course, in other embodiments, the baffle 50 can also be installed on the middle heat exchanger 12 and the rear heat exchanger 13 by screw locking, and the present design is not limited to this.

In some embodiments of the present application, as shown in Figures 1 and 2, the aperture of the fourth heat exchange tube 21 is larger than the apertures of the first heat exchange tube 111, the second heat exchange tube 121 and the third heat exchange tube 131, and the apertures of the first heat exchange tube 111, the second heat exchange tube 121 and the third heat exchange tube 131 are the same.

It is understandable that the use of small-diameter heat exchange tubes can reduce the materials used for heat exchange tubes, thereby significantly reducing the overall cost of the heat exchanger assembly 100. However, when the refrigerant passes through the small-diameter heat exchange tubes, the heat exchange resistance is large and the pressure loss is large, which is not conducive to the circulation of the refrigerant. This unfavorable effect can be balanced by increasing the diameter of the fourth heat exchange tube 21. At the same time, during cooling, the refrigerant first flows through the large-diameter pipeline and then flows into the small-diameter pipeline, which is more energy-efficient than the refrigerant first flowing through the small-diameter pipeline and then flowing through the large-diameter pipeline. In the process of the refrigerant changing from gas to liquid, the diameter of the tube is gradually reduced, and the heat exchange area of the refrigerant in contact with the wall of the heat exchange tube is increased; while during heating, the refrigerant first flows through the small-diameter pipeline and then flows through the large-diameter pipeline, which is more energy-efficient than the refrigerant first flowing through the large-diameter pipeline and then flowing through the small-diameter pipeline.

Taking into account the cost of the heat exchanger assembly 100 and the refrigerant circulation efficiency, the diameter of the fourth heat exchange tube 21 is larger than the diameters of the first heat exchange tube 111, the second heat exchange tube 121 and the third heat exchange tube 131, which can reduce the production cost of the heat exchanger assembly 100 while improving the heat exchange efficiency of the heat exchanger assembly 100. The first heat exchange tube 111, the second heat exchange tube 121 and the third heat exchange tube 131 have the same aperture, which simplifies the structure, facilitates manufacturing, and reduces the cost of the heat exchanger assembly 100.

In some embodiments of the present application, the aperture of the fourth heat exchange tube 21 is 7 mm, and the apertures of the first heat exchange tube 111, the second heat exchange tube 121, and the third heat exchange tube 131 are 5 mm. It can be understood that heat exchange tubes with a tube diameter of 7 mm and a tube diameter of 5 mm are both widely used heat exchange tubes in the prior art. Therefore, the use of heat exchange tubes with these two tube diameters is conducive to reducing the difficulty of obtaining heat exchange tubes, and can reduce the manufacturing cost of the heat exchange assembly 100 while ensuring the heat exchange energy efficiency of the heat exchanger assembly 100.

The air conditioner indoor unit according to the present application is described below.

The air conditioner indoor unit according to the present application includes the above-mentioned heat exchanger assembly 100.

When the heat exchanger assembly 100 is applied to an indoor unit of an air conditioner, the indoor unit of the air conditioner comprises a housing, a wind wheel and a heat exchanger assembly 100. The housing has an air inlet 20 and an air outlet 30, the air inlet 20 is arranged on the upper side of the housing, the air outlet 30 is arranged on the lower side of the housing, the wind wheel is arranged in the housing, and the heat exchanger assembly 100 It is arranged in the shell and located on the air inlet side of the wind wheel. It can be understood that the wind wheel drives the airflow to flow from the air inlet 20 to the air outlet 30, and the heat exchanger assembly 100 is arranged upstream of the wind wheel. Therefore, the side of the main heat exchanger 1 away from the wind wheel is the windward side, and the side of the main heat exchanger 1 close to the wind wheel is the leeward side. When the air conditioner indoor unit is working, the motor drives the wind wheel to rotate. Under the action of the wind wheel, the airflow is driven to flow from the air inlet 20 to the air outlet 30. After the airflow enters the air inlet 20, it exchanges heat with the heat exchanger assembly 100. The airflow after heat exchange flows to the air outlet 30 under the action of the wind wheel, thereby exchanging heat with the air inhaled by the wind wheel to achieve the cooling or heating effect of the air conditioner indoor unit.

It should be noted that the air conditioner indoor unit may be an indoor unit of a wall-mounted split air conditioner or an indoor unit or indoor unit of other air conditioners, and the wind wheel may be a cross-flow wind wheel, an axial flow wind wheel or other wind wheels.

According to the air-conditioning indoor unit of the present application, by setting the above-mentioned heat exchanger assembly 100, a main heat exchanger 1 and a back-tube heat exchanger 2 arranged on the windward side of the main heat exchanger 1 are set, the main heat exchanger 1 includes a front heat exchanger 11, a middle heat exchanger 12 and a rear heat exchanger 13 which are spliced in sequence, the front heat exchanger 11 has a first heat exchange tube 111, the middle heat exchanger 12 has a second heat exchange tube 121, the rear heat exchanger 13 has a third heat exchange tube 131, and the back-tube heat exchanger 2 has a fourth heat exchange tube 21. When the heat exchanger assembly 100 is cooling, the refrigerant flowing out of the back-tube heat exchanger 2 is divided into multiple flow paths and flows to the front heat exchanger 11, the middle heat exchanger 12 and the rear heat exchanger 13 at the same time, so that the heat exchange pipeline of the heat exchanger assembly 100 is more reasonable, thereby effectively improving the heat exchange efficiency of the air-conditioning indoor unit, reducing the energy consumption of the air-conditioning indoor unit, and improving the energy efficiency of the air-conditioning indoor unit. At the same time, the small-diameter heat exchange tube has good applicability and high heat exchange efficiency. Under the premise of the same heat exchange capacity, the volume of the heat exchanger assembly 100 can be relatively reduced, which is conducive to the miniaturization of the air-conditioning indoor unit.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims (37)

A heat exchanger assembly, comprising: A main heat exchanger, the main heat exchanger comprising a front heat exchanger, a middle heat exchanger and a rear heat exchanger, the front heat exchanger, the middle heat exchanger and the rear heat exchanger are spliced in sequence, the front heat exchanger has a first heat exchange tube, the middle heat exchanger has a second heat exchange tube, and the rear heat exchanger has a third heat exchange tube; A back-tube heat exchanger, the back-tube heat exchanger being arranged on the windward side of the main heat exchanger, the back-tube heat exchanger having a fourth heat exchange tube; When the heat exchanger assembly is cooling, the refrigerant flows from the back tube heat exchanger to the main heat exchanger, and the refrigerant flowing out of the back tube heat exchanger is divided into multiple flow paths and flows to the front heat exchanger, the middle heat exchanger and the rear heat exchanger at the same time. The heat exchanger assembly according to claim 1, wherein the flow path of the heat exchanger assembly includes an input flow path, a first flow path, a second flow path and a third flow path, the input flow path flows through the fourth heat exchange tube of the back tube heat exchanger, the first flow path flows through the first heat exchange tube of the front heat exchanger and part of the second heat exchange tube of the middle heat exchanger, the second flow path flows through the remaining part of the second heat exchange tube of the middle heat exchanger, and the third flow path flows through the third heat exchange tube of the rear heat exchanger. When the heat exchanger assembly is refrigerated, the refrigerant flows through the input flow path and then is split into the first flow path, the second flow path and the third flow path at the same time. The heat exchanger assembly according to claim 2, wherein the middle heat exchanger includes a first area and a second area, the first area is located on a side of the second area close to the front heat exchanger, the first flow path flows through the second heat exchange tube in the first area, and the second flow path flows through the second heat exchange tube in the second area. The heat exchanger assembly according to claim 2, wherein the first heat exchange tube includes the first heat exchange tube on the windward side and the first heat exchange tube on the leeward side, the second heat exchange tube includes the second heat exchange tube on the windward side and the second heat exchange tube on the leeward side, and the first flow path flows through the second heat exchange tube on the windward side of the middle heat exchanger, the first heat exchange tube on the windward side of the front heat exchanger, the first heat exchange tube on the leeward side of the front heat exchanger, and the second heat exchange tube on the leeward side of the middle heat exchanger in sequence. The heat exchanger assembly according to claim 2, wherein the second heat exchange tube comprises the second heat exchange tube on the windward side and the second heat exchange tube on the leeward side, and the second flow path flows through the second heat exchange tube on the windward side of the middle heat exchanger and the second heat exchange tube on the leeward side of the middle heat exchanger in sequence. The heat exchanger assembly according to claim 2, wherein the second heat exchange tube includes the second heat exchange tube on the windward side and the second heat exchange tube on the leeward side, the middle heat exchanger includes a first area and a second area, the first area includes part of the second heat exchange tube on the windward side and part of the second heat exchange tube on the leeward side, the second area includes the rest of the second heat exchange tube on the windward side and the rest of the second heat exchange tube on the leeward side, the first flow path flows through the second heat exchange tube in the first area and the first heat exchange tube of the front heat exchanger, and the second flow path flows through the second heat exchange tube in the second area. The heat exchanger assembly according to claim 6, wherein the first heat exchange tube includes the first heat exchange tube on the windward side and the first heat exchange tube on the leeward side, and the first flow path sequentially flows through the second heat exchange tube on the windward side of the first region, the first heat exchange tube on the windward side of the front heat exchanger, the first heat exchange tube on the leeward side of the front heat exchanger, and the second heat exchange tube on the leeward side of the first region. The heat exchanger assembly according to claim 6, wherein the second flow path flows from the second heat exchange tube on the windward side of the second region to the second heat exchange tube on the leeward side of the second region. The heat exchanger assembly according to claim 6, wherein the first area is located on a side of the second area close to the front heat exchanger. The heat exchanger assembly according to any one of claims 2 to 9, wherein the input flow path is connected to the first flow path, the second flow path and the third flow path through a distributor. The heat exchanger assembly according to any one of claims 2 to 10, wherein the third heat exchange tube comprises the third heat exchange tube on the windward side and the third heat exchange tube on the leeward side, and the third flow path flows from the third heat exchange tube on the windward side of the rear heat exchanger to the third heat exchange tube on the leeward side of the rear heat exchanger. The heat exchanger assembly according to any one of claims 2 to 11, wherein the number of heat exchange tubes in the first flow path is greater than the number of heat exchange tubes in the third flow path, and the number of heat exchange tubes in the third flow path is greater than the number of heat exchange tubes in the second flow path. The heat exchanger assembly according to claim 1, wherein the heat exchange flow path of the heat exchanger assembly comprises an input flow path, a first flow path, a second flow path, a third flow path and a fourth flow path, the input flow path flows through the fourth heat exchange tube of the back tube heat exchanger, the first flow path flows through the first heat exchange tube of the front heat exchanger, the second flow path flows through part of the second heat exchange tube of the middle heat exchanger, the third flow path flows through part of the second heat exchange tube of the middle heat exchanger and part of the third heat exchange tube of the rear heat exchanger, the fourth flow path flows through the remaining part of the third heat exchange tube of the rear heat exchanger and the remaining part of the second heat exchange tube of the middle heat exchanger, when the heat exchanger assembly is refrigerated, the refrigerant flows through the input flow path and is simultaneously divided into the first flow path, the second flow path, the third flow path and the fourth flow path. The heat exchanger assembly according to claim 13, wherein the input flow path is connected to the first flow path, the second flow path, the third flow path, and the fourth flow path through a distributor. The heat exchanger assembly according to claim 13, wherein the first heat exchange tube comprises the first heat exchange tube on the windward side and the first heat exchange tube on the leeward side, and the first flow path flows from the first heat exchange tube on the windward side of the front heat exchanger to the first heat exchange tube on the leeward side of the front heat exchanger. The heat exchanger assembly according to claim 13, wherein the second heat exchange tube includes the second heat exchange tube on the windward side and the second heat exchange tube on the leeward side, the middle heat exchanger includes a third area, a fourth area and a fifth area, the third area includes part of the second heat exchange tube on the windward side and part of the second heat exchange tube on the leeward side, the fourth area includes the second heat exchange tube on the remaining part of the windward side and part of the second heat exchange tube on the leeward side, the fifth area includes the second heat exchange tube on the remaining part of the leeward side, the third heat exchange tube includes the third heat exchange tube on the windward side and the third heat exchange tube on the leeward side, the rear heat exchanger includes a sixth area and a seventh area, the sixth area includes part of the third heat exchange tube on the windward side and part of the third heat exchange tube on the leeward side, the seventh area includes the third heat exchange tube on the remaining part of the windward side and the third heat exchange tube on the remaining part of the leeward side, The second flow path flows through the second heat exchange tube in the third region, the third flow path flows through the second heat exchange tube in the fourth region and the third heat exchange tube in the sixth region, and the fourth flow path flows through the second heat exchange tube in the fifth region and the third heat exchange tube in the seventh region. The heat exchanger assembly according to claim 16, wherein the second flow path flows from the second heat exchange tube on the windward side of the third region to the second heat exchange tube on the leeward side of the third region. The heat exchanger assembly according to claim 16, wherein the third flow path flows sequentially through the second heat exchange tube on the windward side of the fourth region, the third heat exchange tube on the windward side of the sixth region, the third heat exchange tube on the leeward side of the sixth region, and the second heat exchange tube on the leeward side of the fourth region. The heat exchanger assembly according to claim 16, wherein the fourth flow path flows sequentially through the third heat exchange tube on the windward side of the seventh region, the third heat exchange tube on the leeward side of the seventh region, and the second heat exchange tube on the leeward side of the fifth region. The heat exchanger assembly according to claim 16, wherein the third area is located on a side of the fourth area close to the front heat exchanger, along the length direction of the middle heat exchanger, the fifth area is located between the third area and the fourth area, and the sixth area is located on a side of the seventh area close to the middle heat exchanger. The heat exchanger assembly according to any one of claims 13 to 20, wherein the number of heat exchange tubes in the first flow path, the second flow path, the third flow path and the fourth flow path is the same. The heat exchanger assembly according to claim 1, wherein the heat exchange flow path of the heat exchanger assembly comprises an input flow path, a first flow path, a second flow path, a third flow path, a fourth flow path and a fifth flow path, the input flow path flows through the fourth heat exchange tube of the back tube heat exchanger, the first flow path flows through a portion of the first heat exchange tube of the front heat exchanger, the second flow path flows through the remaining portion of the first heat exchange tube of the front heat exchanger and a portion of the second heat exchange tube of the middle heat exchanger, the third flow path flows through a portion of the second heat exchange tube of the middle heat exchanger, the fourth flow path flows through the remaining portion of the second heat exchange tube of the middle heat exchanger and a portion of the third heat exchange tube of the rear heat exchanger, and the fifth flow path flows through the remaining portion of the third heat exchange tube of the rear heat exchanger. When the heat exchanger assembly is refrigerated, the refrigerant flows through the input flow path and is simultaneously divided into the first flow path, the second flow path, the third flow path, the fourth flow path and the fifth flow path. The heat exchanger assembly according to claim 22, wherein the input flow path is connected to the first flow path, the second flow path, the third flow path, the fourth flow path and the fifth flow path through a distributor. The heat exchanger assembly according to claim 22, wherein the first heat exchange tube includes the first heat exchange tube on the windward side and the first heat exchange tube on the leeward side, the second heat exchange tube includes the second heat exchange tube on the windward side and the second heat exchange tube on the leeward side, and the third heat exchange tube includes the third heat exchange tube on the windward side and the third heat exchange tube on the leeward side, The front heat exchanger includes an eighth region and a ninth region, the eighth region includes part of the first heat exchange tube on the windward side and the first heat exchange tube on the leeward side, the ninth region includes the remaining part of the first heat exchange tube on the windward side, the middle heat exchanger includes a tenth region, an eleventh region and a twelfth region, the tenth region includes part of the second heat exchange tube on the windward side and part of the second heat exchange tube on the leeward side, the eleventh region includes part of the second heat exchange tube on the windward side and the remaining part of the second heat exchange tube on the leeward side, the twelfth region includes the remaining part of the second heat exchange tube on the windward side, the rear heat exchanger includes a thirteenth region and a fourteenth region, the thirteenth region includes part of the third heat exchange tube on the windward side and part of the third heat exchange tube on the leeward side, the fourteenth region includes the remaining part of the third heat exchange tube on the windward side and the remaining part of the third heat exchange tube on the leeward side, The first flow path flows through the first heat exchange tube in the eighth region, the second flow path flows through the first heat exchange tube in the ninth region and the second heat exchange tube in the tenth region, the third flow path flows through the second heat exchange tube in the eleventh region, the fourth flow path flows through the second heat exchange tube in the twelfth region and the third heat exchange tube in the thirteenth region, and the fifth flow path flows through the third heat exchange tube in the fourteenth region. The heat exchanger assembly according to claim 24, wherein the first flow path flows from the first heat exchange tube on the windward side of the eighth region to the first heat exchange tube on the leeward side of the eighth region. The heat exchanger assembly according to claim 24, wherein the second flow path flows through the first heat exchange tube on the windward side of the ninth region, the second heat exchange tube on the windward side of the tenth region, and the second heat exchange tube on the leeward side of the tenth region in sequence. The heat exchanger assembly according to claim 24, wherein the third flow path flows through the second heat exchange tube on the windward side of the eleventh region and the second heat exchange tube on the leeward side of the eleventh region in sequence. The heat exchanger assembly according to claim 24, wherein the fourth flow path flows sequentially through the second heat exchange tube on the windward side of the twelfth region, the third heat exchange tube on the windward side of the thirteenth region, and the third heat exchange tube on the leeward side of the thirteenth region. The heat exchanger assembly according to claim 24, wherein the fifth flow path flows through the third heat exchange tube on the windward side of the fourteenth region and the third heat exchange tube on the leeward side of the fourteenth region in sequence. The heat exchanger assembly according to claim 24, wherein the thirteenth region is located on a side of the fourteenth region close to the middle heat exchanger, and the first heat exchange tube on the windward side of the ninth region is located on a side of the first heat exchange tube on the windward side of the eighth region close to the middle heat exchanger, The second heat exchange tube on the windward side of the tenth region is located on the side of the second heat exchange tube on the windward side of the twelfth region close to the front heat exchanger, and along the length direction of the middle heat exchanger, the second heat exchange tube on the windward side of the twelfth region is located between the second heat exchange tube on the windward side of the tenth region and the second heat exchange tube on the windward side of the twelfth region, and the second heat exchange tube on the leeward side of the tenth region is located on the side of the second heat exchange tube on the leeward side of the eleventh region close to the front heat exchanger. The heat exchanger assembly according to any one of claims 22 to 30, wherein the number of heat exchange tubes in the first flow path, the second flow path, the third flow path, the fourth flow path and the fifth flow path is the same. The heat exchanger assembly according to any one of claims 1 to 31, wherein the back-tube heat exchanger is arranged on the windward side of the middle heat exchanger. The heat exchanger assembly according to any one of claims 1 to 32, wherein a baffle is provided on the windward side of the connection between the middle heat exchanger and the rear heat exchanger. The heat exchanger assembly according to claim 33, wherein a seal is provided between the baffle plate and the middle heat exchanger and between the baffle plate and the rear heat exchanger. The heat exchanger assembly according to any one of claims 1 to 34, wherein the aperture of the fourth heat exchange tube is larger than the apertures of the first heat exchange tube, the second heat exchange tube and the third heat exchange tube, and the apertures of the first heat exchange tube, the second heat exchange tube and the third heat exchange tube are the same. The heat exchanger assembly according to claim 35, wherein the aperture of the fourth heat exchange tube is 7 mm, and the apertures of the first heat exchange tube, the second heat exchange tube and the third heat exchange tube are 5 mm. An air-conditioning indoor unit, comprising a heat exchanger assembly according to any one of claims 1-36.