CN215260159U

CN215260159U - Heat exchanger assembly and air conditioner indoor unit with same

Info

Publication number: CN215260159U
Application number: CN202121743887.5U
Authority: CN
Inventors: 王金锋; 宋分平
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2021-12-21
Anticipated expiration: 2031-07-28
Also published as: JP2023024930A; JP7221428B1

Abstract

The utility model discloses a machine in heat exchanger assembly and air conditioning that has it, heat exchanger assembly includes: the main heat exchanger comprises a front heat exchanger and a rear heat exchanger, the front heat exchanger comprises an upper heat exchange part and a lower heat exchange part, the upper end of the upper heat exchange part is connected with the upper end of the rear heat exchanger, the upper end of the lower heat exchange part is integrally connected with the lower end of the upper heat exchange part, the front heat exchanger comprises a first heat exchange tube and a second heat exchange tube, and the rear heat exchanger comprises a third heat exchange tube; the auxiliary heat exchanger is arranged on the windward side of the main heat exchanger and is provided with a fourth heat exchange tube; the pipe diameter of the fourth heat exchange pipe is larger than that of the third heat exchange pipe, the pipe diameter of the third heat exchange pipe is equal to that of the second heat exchange pipe, the pipe diameter of the second heat exchange pipe is larger than that of the first heat exchange pipe, and when the heat exchanger assembly refrigerates, the refrigerant flows to the first heat exchange pipe, the second heat exchange pipe and the second heat exchange pipe of the main heat exchanger from the fourth heat exchange pipe of the auxiliary heat exchanger. The utility model discloses a heat exchanger assembly, it is with low costs, the efficiency is high.

Description

Heat exchanger assembly and air conditioner indoor unit with same

Technical Field

The utility model belongs to the technical field of air treatment device technique and specifically relates to a heat exchanger assembly and have its air conditioning indoor set is related to.

Background

In the related technology, along with the requirement of the market on the higher energy efficiency of the air conditioner, the length of the evaporator needs to be increased for realizing high energy efficiency, the strict limitation of the indoor unit size of a room in a special area cannot be met, and the conventional heat exchanger usually only comprises one pipe diameter and cannot be well adapted to the state change of a refrigerant, so that the heat exchange effect of the refrigerant can be brought into play to the best state.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a heat exchanger assembly, heat exchanger assembly is with low costs, the efficiency is high.

The utility model also provides an air conditioner, the air conditioner includes above-mentioned heat exchanger assembly.

According to the utility model discloses heat exchanger assembly, include: the heat exchanger comprises a main heat exchanger and a heat exchanger body, wherein the main heat exchanger comprises a front heat exchanger and a rear heat exchanger, the front heat exchanger comprises an upper heat exchange part and a lower heat exchange part, the upper end of the upper heat exchange part is connected with the upper end of the rear heat exchanger, the upper end of the lower heat exchange part is integrally connected with the lower end of the upper heat exchange part, the front heat exchanger comprises a first heat exchange tube and a second heat exchange tube, and the rear heat exchanger comprises a third heat exchange tube; the auxiliary heat exchanger is arranged on the windward side of the main heat exchanger and is provided with a fourth heat exchange tube; the pipe diameter of the fourth heat exchange pipe is larger than that of the third heat exchange pipe, the pipe diameter of the third heat exchange pipe is equal to that of the second heat exchange pipe, the pipe diameter of the second heat exchange pipe is larger than that of the first heat exchange pipe, and when the heat exchanger assembly is used for refrigerating, a refrigerant flows to the first heat exchange pipe, the second heat exchange pipe and the second heat exchange pipe of the main heat exchanger through the fourth heat exchange pipe of the auxiliary heat exchanger.

According to the utility model discloses heat exchanger assembly, set up auxiliary heat exchanger through the windward side at main heat exchanger, set up first heat exchange tube and second heat exchange tube in the front in the heat exchanger, set up the third heat exchange tube in the heat exchanger of back, set up the fourth heat exchange tube in auxiliary heat exchanger, and make the pipe diameter of fourth heat exchange tube be greater than the pipe diameter of third heat exchange tube, the pipe diameter of third heat exchange tube equals the pipe diameter of second heat exchange tube, the pipe diameter of second heat exchange tube is greater than the pipe diameter of first heat exchange tube, when heat exchanger assembly refrigerates, the refrigerant is by the first heat exchange tube of the fourth heat exchange tube flow direction main heat exchanger of auxiliary heat exchanger, second heat exchange tube and second heat exchange tube, such structure and flow path can improve heat exchanger assembly's heat transfer efficiency when not increasing heat exchange tube length and not increasing the shared space of heat exchanger assembly installation, simultaneously can save the cost.

According to some embodiments of the present invention, the lower heat exchanging part and the lower end portion of the upper heat exchanging part are configured as a first region, the rest of the upper heat exchanging part is configured as a second region, the first region and the second region each include the first heat exchanging tube and the second heat exchanging tube, in the first region, the second heat exchanging tube is located on a leeward side of the first heat exchanging tube, in the second region, the second heat exchanging tube is located on a windward side of the first heat exchanging tube, the heat exchanging flow path of the heat exchanger assembly includes a first flow path, a second flow path, a third flow path, and a fourth flow path, the first flow path flows through the fourth heat exchanging tube of the auxiliary heat exchanger, the second flow path flows through the third heat exchanging tube of the rear heat exchanger, and the third flow path flows through the rest of the rear heat exchanger, the third heat exchanging tube and the first and second heat exchanging tubes of the second region, the fourth flow path flows through the first heat exchange tube and the second heat exchange tube in the first area, and when the heat exchanger assembly is used for refrigerating, a refrigerant sequentially flows through the first flow path, the second flow path, the third flow path and the fourth flow path.

In some embodiments of the present invention, the first region and the second region have three rows of heat exchange tubes, the first region includes two rows located on the windward side, the first heat exchange tube and one row located on the leeward side, the second region includes two rows located on the windward side, the second heat exchange tube and one row located on the leeward side, the first heat exchange tube.

In some embodiments of the present invention, the third flow path includes a first main path, a first branch path, a second branch path, a third branch path, a fourth branch path and a fifth branch path, the first main path flows through the second heat exchange tube in the second region, the first branch path and the second branch path all flow through the first heat exchange tube and the second heat exchange tube in the second region, the first main path, the first branch path and the second branch path constitute all the first heat exchange tube and the second heat exchange tube in the second region, the third branch path, the fourth branch path and the fifth branch path constitute the rest of the rear heat exchanger, when the heat exchanger assembly performs refrigeration, the refrigerant flows through the first main path and then simultaneously flows into the first branch path and the second branch path, the first branch path and the second branch path simultaneously flow into the third branch path after merging, The fourth branch and the fifth branch.

The utility model discloses an in some embodiments, the third flow path includes first main road, first branch road and second branch road, first main road flows through the second is regional the second heat exchange tube, first branch road flows through the part of back heat exchanger the third heat exchange tube with the second is regional the second heat exchange tube with first heat exchange tube, the second branch road flows through the rest of back heat exchanger the third heat exchange tube with the rest of the second is regional the second heat exchange tube with first heat exchange tube when the heat exchanger subassembly refrigerates, the refrigerant flows through shunt simultaneously and get into first branch road and second branch road behind the first main road.

In some embodiments of the present invention, the first branch comprises a first sub-branch and a second sub-branch, the first sub-branch flows through part of the third heat exchange tubes of the rear heat exchanger, the second sub-branch flows through part of the second heat exchange tubes and part of the first heat exchange tubes of the second area, when the heat exchanger component is used for refrigerating, refrigerant flows through the first sub-branch and the second sub-branch in sequence, and/or the second branch comprises a third sub-branch and a fourth sub-branch, the third sub-branch flows through the rest part of the third heat exchange tube of the rear heat exchanger, the fourth sub-branch flows through the remaining portion of the second heat exchange tube and the remaining portion of the first heat exchange tube of the second zone, when the heat exchanger assembly refrigerates, a refrigerant sequentially flows through the third sub-branch and the fourth sub-branch.

The utility model discloses an in some embodiments, back heat exchanger the third heat exchange tube includes that the windward is listed as the heat exchange tube, the middle heat exchange tube that is listed as and leeward is listed as the heat exchange tube, the second flow path flows through the windward is listed as the heat exchange tube, the third flow path certainly in the middle heat exchange tube that is listed as the third heat exchange tube flow direction in the leeward is listed as the heat exchange tube the third heat exchange tube.

In some embodiments of the present invention, the fourth flow path includes a sixth branch, a seventh branch, an eighth branch, a ninth branch, a tenth branch and an eleventh branch, and the sixth branch, the seventh branch, the eighth branch, the ninth branch, the tenth branch and the eleventh branch form all of the first heat exchange tube and the second heat exchange tube in the first region.

In some embodiments of the present invention, when the heat exchanger component is used for cooling, the refrigerant in each of the sixth branch and the eleventh branch flows from the first heat exchange tube to the second heat exchange tube.

According to some embodiments of the utility model, the auxiliary heat exchanger includes first auxiliary heat exchanger and the auxiliary heat exchanger of second, first auxiliary heat exchanger is located the windward side of back heat exchanger, the auxiliary heat exchanger of second is located the windward side of last heat transfer portion.

In some embodiments of the present invention, the auxiliary heat exchanger has 1 to 6 fourth heat exchange tubes.

According to the utility model discloses a some embodiments, the pipe diameter of fourth heat exchange tube is 7mm, the third heat exchange tube with the pipe diameter of second heat exchange tube is 6.35mm, the pipe diameter of first heat exchange tube is 5 mm.

According to some embodiments of the present invention, the number of heat exchange tubes of the heat exchanger assembly is 40 or more.

The air-conditioning indoor unit comprises a shell, wherein the shell is provided with an air inlet and an air outlet; the wind wheel is arranged in the shell to drive airflow to flow from the air inlet to the air outlet; in the heat exchanger assembly, the heat exchanger assembly is arranged in the shell and is positioned on the air inlet side of the wind wheel.

According to the air-conditioning indoor unit of the embodiment of the utility model, the heat exchanger component is arranged, the auxiliary heat exchanger is arranged at the windward side of the main heat exchanger, a first heat exchange tube and a second heat exchange tube are arranged in the front heat exchanger, a third heat exchange tube is arranged in the rear heat exchanger, a fourth heat exchange tube is arranged in the auxiliary heat exchanger, the tube diameter of the fourth heat exchange tube is larger than that of the third heat exchange tube, the tube diameter of the third heat exchange tube is equal to that of the second heat exchange tube, the tube diameter of the second heat exchange tube is larger than that of the first heat exchange tube, when the heat exchanger component is used for refrigerating, the refrigerant flows to the first heat exchange tube, the second heat exchange tube and the second heat exchange tube of the main heat exchanger from the fourth heat exchange tube of the auxiliary heat exchanger, the structure and the flow path can improve the heat exchange efficiency of the heat exchanger assembly without increasing the length of the heat exchange tube and the occupied space of the heat exchanger assembly, and can save the cost.

In some embodiments of the invention, the angle between the rear heat exchanger and the vertical direction is 48 ° or less.

In some embodiments of the present invention, the distance between the main heat exchanger and the wind wheel is 10mm or more.

In some embodiments of the present invention, the width of the housing in the front-back direction is 800mm or less, and the height of the housing in the up-down direction is 300mm or less.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention;

fig. 2 is a schematic view of a flow path of a refrigerant of a heat exchanger according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating a flow path of a refrigerant of a heat exchanger according to another embodiment of the present invention.

Reference numerals:

1000. an air-conditioning indoor unit;

100. a heat exchanger assembly;

1. a primary heat exchanger; 11. a front heat exchanger; 111. an upper heat exchanging part; 112. a lower heat exchanging portion; 113. a first heat exchange tube; 114. a second heat exchange tube; 115. a first region; 116. a second region; 12. a rear heat exchanger; 121. a third heat exchange tube;

2. an auxiliary heat exchanger; 21. a fourth heat exchange tube; 22. a first auxiliary heat exchanger; 23. a second auxiliary heat exchanger;

3. a first flow path;

4. a second flow path;

5. a third flow path; 51. a first main road; 52. a first branch; 521. a first sub-branch; 522. a second sub-branch; 53. a second branch circuit; 531. a third sub-branch; 532. a fourth sub-branch; 54. a third branch; 55. a fourth branch; 56. a fifth branch;

6. a fourth flow path; 61. a sixth branch; 62. a seventh branch; 63. an eighth branch; 64. a ninth branch; 65. a tenth branch; 66. an eleventh branch;

200. a housing; 201. an air inlet; 202. an air outlet;

300. and a wind wheel.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

A heat exchanger assembly 100 and an air conditioning indoor unit 1000 according to an embodiment of the present invention will be described below with reference to fig. 1 to 3.

As shown in fig. 1, an air conditioner indoor unit 1000 according to an embodiment of the present invention includes a casing 200, a wind wheel 300, and a heat exchanger assembly 100. The air-conditioning indoor unit 1000 is an indoor unit of a wall-mounted split air conditioner, but may be an indoor unit or an indoor unit of another air conditioner, and is not limited thereto.

Specifically, referring to fig. 1, the housing 200 has an intake vent 201 and an exhaust vent 202, the intake vent 201 being disposed at an upper side of the housing 200, and the exhaust vent 202 being disposed at a lower side of the housing 200. Generally, the width of the housing 200 in the front-rear direction is 800mm or less, and the height of the housing 200 in the up-down direction is 300mm or less. The wind wheel 300 is disposed in the housing 200 to drive airflow from the wind inlet 201 to the wind outlet 202. The wind rotor 300 is a cross-flow wind rotor 300, but may be other wind rotors 300, such as an axial flow wind rotor 300.

As shown in fig. 1, in an embodiment of the present application, a heat exchanger assembly 100 is applied to a wall-mounted indoor unit 1000 of an air conditioner, the indoor unit 1000 of the air conditioner includes a casing 200 and a wind wheel 300 located in the casing 200, and the heat exchanger assembly 100 is located in the casing 200 and located on an air inlet side of the wind wheel 300 to exchange heat for air sucked by the wind wheel 300, so as to achieve a cooling or heating effect of a room. Wherein the wind wheel 300 may be a cross-flow wind wheel 300.

When the indoor unit 1000 of the air conditioner works, the motor drives the wind wheel 300 to rotate, under the action of the wind wheel 300, airflow is driven to flow from the air inlet 201 to the air outlet 202, the airflow enters the air inlet 201 and then exchanges heat with the heat exchanger assembly 100, the airflow after heat exchange flows to the air outlet 202 under the action of the wind wheel 300, an air guide assembly can be arranged at the air outlet 202, and the air guide assembly can guide the airflow to a required position in a room, for example, the airflow is guided upwards, or the airflow is guided downwards, or the airflow is guided towards the left side or the right side.

It is understood that the heat exchanger assembly 100 may be applied to an all-in-one air conditioner or an indoor air conditioner 1000 or an outdoor air conditioner.

As shown in fig. 1, a heat exchanger assembly 100 according to an embodiment of the present invention includes a main heat exchanger 1 and an auxiliary heat exchanger 2.

Specifically, the main heat exchanger 1 includes a front heat exchanger 11 and a rear heat exchanger 12, the front heat exchanger 11 is located at the front side of the rear heat exchanger 12, the front heat exchanger 11 includes an upper heat exchanging portion 111 and a lower heat exchanging portion 112, the upper end (upper side as shown in fig. 1) of the upper heat exchanging portion 111 is connected to the upper end (upper side as shown in fig. 1) of the rear heat exchanger 12, the upper end (upper side as shown in fig. 1) of the lower heat exchanging portion 112 is integrally connected to the lower end (lower side as shown in fig. 1) of the upper heat exchanging portion 111, wherein the integral connection of the lower heat exchanging portion 112 and the upper heat exchanging portion 111 means that the fins on the lower heat exchanging portion 112 and the upper heat exchanging portion 111 are one piece, each fin includes a front heat exchanging region located on the lower heat exchanging portion 112 and a middle heat exchanging region located on the upper heat exchanging portion 111, the lower heat exchanging portion 112 and the upper heat exchanging portion 111 are integrated, thereby reducing the difficulty in producing the lower heat exchanging portion 112 and the upper heat exchanging portion 111, meanwhile, the integral assembly of the heat exchanger assembly 100 is facilitated, the working time is saved, and the production cost is reduced.

For better adaptation wind wheel 300's shape, further be close to wind wheel 300, the medial surface of preceding heat exchanger 11 can set up to the cambered surface design of orientation lordosis, the medial surface of back heat exchanger 12 can set up to the cambered surface setting of orientation kyphosis for the air current of flowing through heat exchanger subassembly 100 can be more smooth and easy, under the same operating power of wind wheel 300, so the design can make the air current velocity of flow through heat exchanger subassembly 100 bigger, thereby promote heat exchanger subassembly 100's heat transfer efficiency.

The lower heat exchange portion 112, the upper heat exchange portion 111 and the rear heat exchanger 12 at least partially surround the wind wheel 300, the lower heat exchange portion 112 is arranged in the front lower portion of the wind wheel 300, the upper heat exchange portion 111 is arranged in the front upper portion of the wind wheel 300 and located between the lower heat exchange portion 112 and the air inlet 201, the upper end of the upper heat exchange portion 111 inclines towards the rear, the lower end of the upper heat exchange portion is connected with the upper end of the lower heat exchange portion 112, the rear heat exchanger 12 is arranged in the rear upper portion of the wind wheel 300, and the upper end of the rear heat exchanger 12 inclines towards the front and is connected with the upper end of the upper heat exchange portion 111.

The rear heat exchanger 12 and the upper heat exchanging portion 111 are formed in a substantially inverted V shape covering the wind wheel 300 from above in a side view. The connection part of the front heat exchanger 11 and the rear heat exchanger 12 is the part of the main heat exchanger 1 closest to the air inlet 201. Specifically, the distance between the connection portion of the rear heat exchanger 12 and the upper heat exchange portion 111 and the air intake 201 is shorter than the distance between any other portion of the main heat exchanger 1 and the air intake 201.

It is to be understood that, as shown in fig. 1, the side of the assembled air conditioning indoor unit 1000 facing the user is front, and the side facing the wall is rear, and the wall-mounted air conditioning indoor unit 1000 adopts a conventional structure in which an air inlet 201 is formed at the upper part and an air outlet 202 is formed at the lower part, that is, the heat exchanger assembly 100 is located at the upstream of the wind wheel 300.

The front heat exchanger 11 includes a first heat exchange pipe 113 and a second heat exchange pipe 114, and it is understood that the heat exchange pipes of the front heat exchanger 11 include both the first heat exchange pipe 113 and the second heat exchange pipe 114. The number of the first heat exchanging pipes 113 may be multiple, the number of the second heat exchanging pipes 114 may be multiple, and the multiple first heat exchanging pipes 113 and the multiple second heat exchanging pipes 114 jointly form all the heat exchanging pipes of the front heat exchanger 11. The rear heat exchanger 12 includes a third heat exchange tube 121, and the third heat exchange tube 121 may be plural. It is to be understood that the heat exchange tubes of the rear heat exchanger 12 may have only one tube type of the third heat exchange tube 121. Of course, the heat exchange tubes of the rear heat exchanger 12 may also include other tube types, which is not limited herein.

The auxiliary heat exchanger 2 is arranged on the windward side of the main heat exchanger 1. The main heat exchanger 1 has a windward side and a leeward side, and the leeward side is located downstream of the windward side and the windward side is located upstream of the leeward side in the direction of airflow flow. As shown in fig. 1, the wind wheel 300 drives the airflow to flow from the air inlet 201 to the air outlet 202, and the heat exchanger assembly 100 is disposed upstream of the wind wheel 300, so that the side of the main heat exchanger 1 away from the wind wheel 300 is the windward side, and the side of the main heat exchanger 1 close to the wind wheel 300 is the leeward side. The auxiliary heat exchanger 2 is arranged on the windward side of the main heat exchanger 1, so that the heat exchange capacity of the heat exchanger assembly 100 can be increased.

The auxiliary heat exchanger 2 has a fourth heat exchange pipe 21, and the fourth heat exchange pipe 21 may be plural. It is to be understood that the heat exchange tube of the auxiliary heat exchanger 2 may have only one tube type of the fourth heat exchange tube 21. Of course, the heat exchange tube of the auxiliary heat exchanger 2 may also comprise other tube types, which is not limited herein.

When the heat exchanger assembly 100 is used for refrigerating, the refrigerant flows from the fourth heat exchange tube 21 of the auxiliary heat exchanger 2 to the first heat exchange tube 113, the second heat exchange tube 114 and the second heat exchange tube 114 of the main heat exchanger 1. According to the arrangement of the wind field, the air flow near the air inlet 201 flows faster, and the air flow is relatively slower at the position far away from the air inlet 201, and when the temperature difference between the refrigerant and the air flow at the position where the air flow flows faster is larger than that at the position where the air flow flows slower, the heat exchange efficiency of the heat exchanger assembly 100 is better. Therefore, when the heat exchanger assembly 100 is used for refrigeration, the part of the heat exchanger assembly 100 close to the air inlet 201 flows to the part far away from the heat exchanger assembly 100, so that the heat exchange energy efficiency of the heat exchanger assembly 100 is better, and when the heat exchanger assembly 100 is used for refrigeration, the refrigerant flows to the first heat exchange tube 113, the second heat exchange tube 114 and the third heat exchange tube 121 of the main heat exchanger 1 from the fourth heat exchange tube 21 of the auxiliary heat exchanger 2, so that the heat exchange energy efficiency of the heat exchanger assembly 100 is better.

During heating, the refrigerant flows through the small-diameter pipeline and then flows through the large-diameter pipeline, and the energy efficiency is higher than that of the refrigerant which flows through the large-diameter pipeline and then flows through the small-diameter pipeline; on the contrary, during refrigeration, the refrigerant flows into the small-diameter pipeline after flowing through the large-diameter pipeline, the energy efficiency is higher than that of the refrigerant flowing through the large-diameter pipeline after flowing through the small-diameter pipeline, the pipe diameter is gradually reduced in the process that the refrigerant is in a gas state to a liquid state, and the contact heat exchange area between the refrigerant and the wall surface of the heat exchange pipe is increased.

Therefore, the pipe diameter of the fourth heat exchange pipe 21 is greater than that of the third heat exchange pipe 121, the pipe diameter of the third heat exchange pipe 121 is equal to that of the second heat exchange pipe 114, and the pipe diameter of the second heat exchange pipe 114 is greater than that of the first heat exchange pipe 113, so that the energy efficiency of the heat exchanger assembly 100 can be better improved. In addition, the material of the heat exchange tube can be reduced by adopting the heat exchange tube with the small tube diameter, so that the overall cost of the heat exchanger assembly 100 is obviously reduced, but when a refrigerant passes through the heat exchange tube with the small tube diameter, the heat exchange resistance is large, the pressure loss is large, the refrigerant circulation is not facilitated, and the cost of the heat exchanger assembly 100 and the refrigerant circulation flow efficiency problem need to be comprehensively considered. Therefore, the first heat exchange tube 113 and the second heat exchange tube 114 are arranged in the front heat exchanger 11, the third heat exchange tube 121 is arranged in the rear heat exchanger 12, the fourth heat exchange tube 21 is arranged in the auxiliary heat exchanger 2, the tube diameter of the fourth heat exchange tube 21 is larger than that of the third heat exchange tube 121, the tube diameter of the third heat exchange tube 121 is equal to that of the second heat exchange tube 114, the tube diameter of the second heat exchange tube 114 is larger than that of the first heat exchange tube 113, and the production cost of the heat exchanger assembly 100 can be reduced while the heat exchange energy efficiency of the heat exchanger assembly 100 is guaranteed to be better.

The fourth heat exchange tube 21 of the auxiliary heat exchanger 2 participates in heat exchange when the heat exchanger assembly 100 is refrigerated, and becomes an extension section of a supercooling section when the heat exchanger assembly 100 is heated, so that energy-saving efficiency can be effectively improved.

According to the heat exchanger assembly 100 of the embodiment of the present invention, the auxiliary heat exchanger 2 is disposed on the windward side of the main heat exchanger 1, the first heat exchanging pipe 113 and the second heat exchanging pipe 114 are disposed in the front heat exchanger 11, the third heat exchanging pipe 121 is disposed in the rear heat exchanger 12, the fourth heat exchanging pipe 21 is disposed in the auxiliary heat exchanger 2, and the pipe diameter of the fourth heat exchanging pipe 21 is larger than that of the third heat exchanging pipe 121, the pipe diameter of the third heat exchanging pipe 121 is equal to that of the second heat exchanging pipe 114, and the pipe diameter of the second heat exchanging pipe 114 is larger than that of the first heat exchanging pipe 113, when the heat exchanger assembly 100 is used for refrigeration, the refrigerant flows from the fourth heat exchanging pipe 21 of the auxiliary heat exchanger 2 to the first heat exchanging pipe 113, the second heat exchanging pipe 114 and the second heat exchanging pipe 114 of the main heat exchanger 1, such structure and flow path can improve the heat exchanging efficiency of the heat exchanger assembly 100 without increasing the heat exchanging pipe length and the space occupied by the heat exchanger assembly 100, and meanwhile, the cost can be saved.

In some embodiments of the present invention, as shown in fig. 1, the lower end portions of the lower heat exchanging part 112 and the upper heat exchanging part 111 are configured as a first region 115, the rest of the upper heat exchanging part 111 is configured as a second region 116, and each of the first region 115 and the second region 116 includes a first heat exchanging pipe 113 and a second heat exchanging pipe 114. That is, the front heat exchanger 11 is divided into two regions, the entire region of the lower heat exchanging part 112 and the lower region of the upper heat exchanging part 111 belong to the first region 115, and the upper region of the upper heat exchanging part 111 belongs to the second region 116. In the first region 115, the second heat exchange pipe 114 is positioned on the leeward side of the first heat exchange pipe 113, and in the second region 116, the second heat exchange pipe 114 is positioned on the windward side of the first heat exchange pipe 113. The heat exchange flow paths of the heat exchanger assembly 100 include a first flow path 3, a second flow path 4, a third flow path 5 and a fourth flow path 6, the first flow path 3 passes through the fourth heat exchange tube 21 of the auxiliary heat exchanger 2, the second flow path 4 passes through a part of the third heat exchange tube 121 of the rear heat exchanger 12, the third flow path 5 passes through the rest of the third heat exchange tube 121 of the rear heat exchanger 12 and the first heat exchange tube 113 and the second heat exchange tube 114 of the second area 116, and the fourth flow path 6 passes through the first heat exchange tube 113 and the second heat exchange tube 114 of the first area 115, and when the heat exchanger assembly 100 is used for refrigerating, a refrigerant sequentially passes through the first flow path 3, the second flow path 4, the third flow path 5 and the fourth flow path 6. When the heat exchanger assembly 100 is used for refrigeration, the whole refrigerant flows through the large-diameter pipeline and then flows into the small-diameter pipeline in the flowing process, so that the heat exchange efficiency of the heat exchanger assembly 100 is better.

Accordingly, when the heat exchanger assembly 100 heats, the refrigerant flows through the fourth flow path 6, the third flow path 5, the second flow path 4, and the first flow path 3 in this order. When the heat exchanger assembly 100 heats, the whole refrigerant flows through the small-diameter pipeline and then flows into the large-diameter pipeline in the flowing process, so that the heating performance can be effectively improved, and the heat exchange efficiency of the heat exchanger assembly 100 is better.

As shown in fig. 1, each of the first and

second regions

115 and 116 has three rows of heat exchange tubes, the first region 115 includes two rows of first heat exchange tubes 113 on the windward side and one row of second heat exchange tubes 114 on the leeward side, and the second region includes two rows of second heat exchange tubes 114 on the windward side and one row of first heat exchange tubes 113 on the leeward side. It is understood that the first region 115 has three rows of heat exchange tubes, one row of the first heat exchange tubes 113, and one row of the second heat exchange tubes 114 in the windward-to-leeward direction, and the second region 116 has three rows of heat exchange tubes, one row of the second heat exchange tubes 114, and one row of the first heat exchange tubes 113 in the windward-to-leeward direction. Therefore, the arrangement of the heat exchange tubes is facilitated, the arrangement of a refrigerant flow path is facilitated, and the energy efficiency of the air conditioner can be improved.

Further, as shown in fig. 2, the third flow path 5 includes a first main path 51, a first branch path 52, a second branch path 53, a third branch path 54, a fourth branch path 55 and a fifth branch path 56, the first main path 51 passes through the second heat exchange tube 114 of the second area 116, the first branch path 52 and the second branch path 53 both pass through the first heat exchange tube 113 and the second heat exchange tube 114 of the second area 116, and the first main path 51, the first branch path 52 and the second branch path 53 constitute all the first heat exchange tube 113 and the second heat exchange tube 114 of the second area 116. It can be understood that the first main path 51 flows through a part of the second heat exchange tubes 114 of the second region 116, the first branch path 52 flows through a part of the second heat exchange tubes 114 and a part of the first heat exchange tubes 113 of the second region 116, the second branch path 53 flows through the rest of the second heat exchange tubes 114 and the rest of the first heat exchange tubes 113 of the second region 116, the first main path 51, the first branch path 52 and the second branch path 53 share all the second heat exchange tubes 114 of the second region 116, and the first branch path 52 and the second branch path 53 share all the first heat exchange tubes 113 of the second region 116.

The third branch 54, the fourth branch 55 and the fifth branch 56 form the remaining third heat exchange tubes 121 of the rear heat exchanger 12. It can be understood that the second flow path 4 flows through a part of the third heat exchange tubes 121 of the rear heat exchanger 12, the third branch 54, the fourth branch 55 and the fifth branch 56 form the rest part of the third heat exchange tubes 121 of the rear heat exchanger 12, and the second flow path 4, the third branch 54, the fourth branch 55 and the fifth branch 56 together form all the third heat exchange tubes 121 of the rear heat exchanger 12.

During cooling of the heat exchanger assembly 100, the refrigerant flows through the first main path 51, then is simultaneously split into the first branch path 52 and the second branch path 53, and the first branch path 52 and the second branch path 53 are merged and then simultaneously split into the third branch path 54, the fourth branch path 55 and the fifth branch path 56. As can be seen, when the heat exchanger assembly 100 is used for cooling, the refrigerant flows from the auxiliary heat exchanger to the upper portions of the rear heat exchanger 12 and the front heat exchanger 11, and flows from the portion of the heat exchanger assembly 100 close to the air inlet 201 to the portion far away from the heat exchanger assembly 100, so that the heat exchange efficiency of the heat exchanger assembly 100 is better.

Accordingly, when the heat exchanger assembly 100 heats, the refrigerant flows into the third branch passage 54, the fourth branch passage 55, and the fifth branch passage 56 at the same time, then is merged and branched into the first branch passage 52 and the second branch passage 53 at the same time, and the refrigerant merged from the first branch passage 52 and the second branch passage 53 flows to the first main passage 51.

Further, the number of the heat exchange tubes of the first branch 52 is the same as that of the heat exchange tubes of the second branch 53, further, the number of the first heat exchange tubes 113 of the first branch 52 is the same as that of the first heat exchange tubes 113 of the second branch 53, and the number of the second heat exchange tubes 114 of the first branch 52 is the same as that of the second heat exchange tubes 114 of the second branch 53. Generally, the difference between every two adjacent branches in the number of heat exchange tubes is less than or equal to 3, so that the heat exchange efficiency is better, and the first branch 52 and the second branch 53 are provided with the same number of first heat exchange tubes 113 and the same number of second heat exchange tubes 114, so that the design of the flow path can be further simplified on the premise of meeting the requirement of better heat exchange efficiency.

In the example shown in fig. 2, each of the rear heat exchanger 12 and the front heat exchanger 11 includes three rows of heat exchange tubes, each of the three rows of heat exchange tubes of the rear heat exchanger 12 is a third heat exchange tube 121, the heat exchange tubes of the second region 116 of the front heat exchanger 11 are a first heat exchange tube 113 and a second heat exchange tube 114, two rows of heat exchange tubes of the second region 116 close to the windward side of the front heat exchanger 11 are a second heat exchange tube 114, and one row of heat exchange tubes close to the leeward side of the front heat exchanger 11 are a first heat exchange tube 113. Specifically, two rows of heat exchange tubes close to the windward side of the front heat exchanger 11 each have two second heat exchange tubes 114, one side heat exchange tube close to the leeward side of the front heat exchanger 11 has two first heat exchange tubes 113, the first main path 51 flows through the two second heat exchange tubes 114 of the second region 116 close to the windward side of the front heat exchanger 11, the first branch path 52 sequentially flows through one second heat exchange tube 114 at the upper part of the middle row of the second region 116 and one first heat exchange tube 113 at the upper part of one row close to the leeward side of the heat exchanger, and the second branch path 53 sequentially flows through one second heat exchange tube 114 at the lower part of the middle row of the second region 116 and one first heat exchange tube 113 at the lower part of one row close to the leeward side of the heat exchanger. It can be seen that the first branch 52 flows through a second heat exchange tube 114 and a first heat exchange tube 113, and the second branch 53 flows through a second heat exchange tube 114 and a first heat exchange tube 113.

Further, the first branch 52, the second branch 53, the third branch 54, the fourth branch 55 and the fifth branch 56 may be connected by a distributor, so that the refrigerant flowing from the first branch 52 and the second branch 53 to the distributor may simultaneously flow to the third branch 54, the fourth branch 55 and the fifth branch 56, thereby facilitating the connection of a plurality of pipes and facilitating the splitting. Of course, a distributor may be disposed between the first main path 51 and the first and

second branches

52 and 53, and the refrigerant in the first main path 51 may be simultaneously split into the first and

second branches

52 and 53.

Further, the third heat exchange tubes 121 of the rear heat exchanger 12 include a windward heat exchange tube array, a middle heat exchange tube array and a leeward heat exchange tube array, and it is understood that the windward heat exchange tube array, the middle heat exchange tube array and the leeward heat exchange tube array are sequentially arranged in the flowing direction of the air flow. For example, in the example shown in fig. 2, the rear heat exchanger 12 includes three rows of heat exchange tubes, a windward row of heat exchange tubes being located on the windward side of the rear heat exchanger 12, a leeward row of heat exchange tubes being located on the leeward side of the rear heat exchanger 12, and a middle row of heat exchange tubes being located between the windward and leeward rows of heat exchange tubes. The second flow path 4 flows through the windward heat exchange tube, because the airflow velocity of the rear heat exchanger 12 on the windward side is faster than that on the leeward side, the temperature difference between the refrigerant and the airflow is larger on the windward side of the rear heat exchanger 12, the energy efficiency of the heat exchanger assembly 100 is better, because the windward heat exchange tube is located on the windward side of the rear heat exchanger 12, the air volume is adapted to the higher energy of the refrigerant, the second flow path 4 flows through the windward heat exchange tube, then the second flow path converges through the first main path 51 and the first branch path 52 and the second branch path 53 which are branched by the first main path 51, and then flows into the third branch path 54, the fourth branch path 55 and the fifth branch path 56, thereby the heat exchange energy efficiency of the heat exchanger assembly 100 is better.

The third flow path 5 flows from the third heat exchange tube 121 in the middle row of heat exchange tubes to the third heat exchange tube 121 in the lee row of heat exchange tubes. It will be appreciated that the branches of the third flow path 5 on the rear heat exchanger 12 are a third branch 54, a fourth branch 55 and a fifth branch 56, and the third branch 54, the fourth branch 55 and the fifth branch 56 all flow from the third heat exchange tube 121 in the middle row of heat exchange tubes to the third heat exchange tube 121 in the leeward row of heat exchange tubes. Therefore, the possibility that the third branch 54, the fourth branch 55 or the fifth branch 56 flows to the heat exchange tubes in the leeward column after flowing through the heat exchange tubes in the middle column is avoided, the possibility that the flow direction of the refrigerant in the third branch 54, the fourth branch 55 and the fifth branch 56 is changed is reduced, and the design of three flow paths is simplified. Meanwhile, the rear heat exchanger 12 is enabled to be from the windward side to the leeward side, the temperature of each refrigerant at each position on the same straight line in the length direction of the rear heat exchanger 12 is approximately the same, and the air flow velocity approximately the same at the same straight line is matched, so that the heat exchange energy efficiency of the heat exchanger assembly 100 can be further improved.

Further, the number of the third heat exchange tubes 121 in the third branch 54, the fourth branch 55 and the fifth branch 56 is the same, generally, the difference between every two of the numbers of the heat exchange tubes in the two adjacent branches is less than or equal to 3, so that the heat exchange energy efficiency is better, and the number of the third heat exchange tubes 121 in the third branch 54, the fourth branch 55 and the fifth branch 56 is set to be the same, so that the design of the flow path can be further simplified on the premise of meeting the requirement of better heat exchange energy efficiency.

Specifically, in the example shown in fig. 2, the third branch 54, the fourth branch 55 and the fifth branch 56 all flow through three third heat exchange tubes 121. The second flow path 4 passes through 4 third heat exchange tubes 121 in the windward row.

In other embodiments of the present invention, as shown in fig. 3, the third flow path 5 includes a first main path 51, a first branch path 52 and a second branch path 53, the first main path 51 flows through the second heat exchanging tube 114 of the second region 116, the first branch path 52 flows through a part of the third heat exchanging tube 121 of the rear heat exchanger 12 and the second heat exchanging tube 114 and the first heat exchanging tube 113 of the second region 116, and the second branch path 53 flows through the rest of the third heat exchanging tube 121 of the rear heat exchanger 12 and the rest of the second heat exchanging tube 114 and the rest of the first heat exchanging tube 113 of the second region 116. It can be understood that the first main path 51 flows through a part of the second heat exchange tube 114 of the second region 116, the first branch path 52 flows through a part of the second heat exchange tube 114 and the first heat exchange tube 113 of the second region 116, the second branch path 53 flows through the rest of the second heat exchange tube 114 and the first heat exchange tube 113 of the second region 116, and the first main path 51, the first branch path 52 and the second branch path 53 share all the heat exchange tubes of the second region 116 together. The second flow path 4 flows through a part of the third heat exchange tubes 121 of the rear heat exchanger 12, the first branch path 52 flows through a part of the third heat exchange tubes 121 of the rear heat exchanger 12, the second branch path 53 flows through a part of the third heat exchange tubes 121 of the rear heat exchanger 12, and all the third heat exchange tubes 121 of the rear heat exchanger 12 are shared by the second flow path 4, the first branch path 52 and the second branch path 53.

When the heat exchanger assembly 100 performs cooling, the refrigerant flows through the first main path 51 and then is simultaneously split into the first branch path 52 and the second branch path 53. As can be seen, when the heat exchanger assembly 100 is used for cooling, the refrigerant flows from the auxiliary heat exchanger 2 to the upper portions of the rear heat exchanger 12 and the front heat exchanger 11, and flows from the portion of the heat exchanger assembly 100 close to the air inlet 201 to the portion far away from the heat exchanger assembly 100, so that the heat exchange efficiency of the heat exchanger assembly 100 is better. In addition, the first main path 51 is divided into two branches, i.e., the first branch 52 and the second branch 53, so that the flow rates of the first branch 52 and the second branch 53 can be increased, and the heat exchange performance during heating can be improved under the condition of equal area.

Accordingly, when the heat exchanger assembly 100 heats, the refrigerant flows into the first branch passage 52 and the second branch passage 53 at the same time, and the refrigerant flowing out of the first branch passage 52 and the second branch passage 53 is merged and flows into the first main passage 51.

Referring to table 1, energy efficiency of the example shown in fig. 2 and the example shown in fig. 3 is shown, and it can be seen that energy efficiency is high in both the example shown in fig. 3 and the example shown in fig. 2.

TABLE 1

The first main path 51, the first branch path 52 and the second branch path 53 may be connected by a distributor, and the refrigerant flowing from the first main path 51 to the distributor may flow to the first branch path 52 and the second branch path 53, respectively.

Further, as shown in fig. 3, the first branch 52 includes a first sub-branch 521 and a second sub-branch 522, the first sub-branch 521 flows through a part of the third heat exchange tubes 121 of the rear heat exchanger 12, the second sub-branch 522 flows through a part of the second heat exchange tubes 114 and a part of the first heat exchange tubes 113 of the second area 116, and when the heat exchanger assembly 100 is used for cooling, the refrigerant flows through the first sub-branch 521 and the second sub-branch 522 in sequence. The second branch 53 includes a third sub-branch 531 and a fourth sub-branch 532, the third sub-branch 531 flows through the remaining third heat exchange tube 121 of the rear heat exchanger 12, the fourth sub-branch 532 flows through the remaining second heat exchange tube 114 of the second area 116 and the remaining first heat exchange tube 113, and when the heat exchanger assembly 100 is used for refrigeration, the refrigerant sequentially flows through the third sub-branch 531 and the fourth sub-branch 532. In the process of flowing the refrigerant, the refrigerant firstly flows through the third heat exchange tube 121 on the rear heat exchanger 12 and flows to the first heat exchange tube 113 and the second heat exchange tube 114 in the second area 116 on the front heat exchanger 11, so that the heat exchange effect can be improved.

The first sub-branch 521, the third sub-branch 531 and the second flow path 4 jointly form all the third heat exchange tubes 121 of the rear heat exchanger 12, and the second sub-branch 522, the fourth sub-branch 532 and the first main path 51 jointly form all the first heat exchange tubes 113 and the second heat exchange tubes 114 of the second area 116.

When the heat exchanger assembly 100 heats, the refrigerant flows to the fourth sub-branch 532 and the third sub-branch 531, then flows through the first sub-branch 521 and the second sub-branch 522 in sequence, finally joins and flows to the first main path 51,

further, as shown in fig. 3, the number of the heat exchange tubes of the first branch 52 and the second branch 53 is the same, and the number of the heat exchange tubes with larger tube diameters of the first branch 52 and the second branch 53 is the same, and the number of the heat exchange tubes with smaller tube diameters is also the same. Specifically, the first branch 52 flows through the four third heat exchange tubes 121 of the rear heat exchanger 12 and the two second heat exchange tubes 114 and the one first heat exchange tube 113 of the second region 116, and the second branch 53 flows through the five third heat exchange tubes 121 of the rear heat exchanger 12 and the one second heat exchange tube 114 and the one first heat exchange tube 113 of the second region 116. Generally, the difference between every two adjacent branches in the number of heat exchange tubes is less than or equal to 3, so that the heat exchange efficiency is better, and the number of the heat exchange tubes of the first branch 52 and the second branch 53 is set to be the same, so that the design of the flow path can be further simplified on the premise of meeting the requirement of better heat exchange efficiency.

When the heat exchanger assembly 100 is used for cooling, the refrigerant of the second sub-branch 522 sequentially flows through the second heat exchange tube 114 and the first heat exchange tube 113, and the refrigerant of the fourth sub-branch 532 sequentially flows through the second heat exchange tube 114 and the first heat exchange tube 113. Thereby improving the heat exchange effect.

In the example shown in fig. 3, each of the rear heat exchanger 12 and the front heat exchanger 11 includes three rows of heat exchange tubes, each of the three rows of heat exchange tubes of the rear heat exchanger 12 is a third heat exchange tube 121, the heat exchange tubes of the second region 116 of the front heat exchanger 11 are a first heat exchange tube 113 and a second heat exchange tube 114, the two rows of heat exchange tubes of the second region 116 close to the windward side of the front heat exchanger 11 are the second heat exchange tubes 114, and the one row of heat exchange tubes close to the leeward side of the front heat exchanger 11 are the first heat exchange tubes 113. Specifically, two rows of heat exchange tubes close to the windward side of the front heat exchanger 11 each have two second heat exchange tubes 114, one heat exchange tube close to the leeward side of the front heat exchanger 11 has two first heat exchange tubes 113, the first main path 51 flows through one second heat exchange tube 114 of the second area 116 close to the upper part of the windward side of the front heat exchanger 11, the first branch 52 flows through one second heat exchange tube 114 of the second area 116 close to the lower part of the windward side row, one second heat exchange tube 114 of the middle row and one first heat exchange tube 113 of the row close to the leeward side of the heat exchanger in sequence after flowing through the third heat exchange tube 121 of the rear heat exchanger 12, the second branch 53 passes through the third heat exchange tube 121 of the rear heat exchanger 12 and then sequentially passes through an upper one of the second heat exchange tubes 114 of the middle row of the second section 116 and an upper one of the first heat exchange tubes 113 of the row adjacent to the leeward side of the heat exchanger.

The first branch circuit 52 and the second branch circuit 53 consider wind field distribution, and adopt a cross flow dividing mode, so that the temperature difference before the two branch circuits are gathered is less than 0.5 ℃ under a rated refrigeration working condition, the heat exchange uniformity of the two branch circuits is ensured, and the refrigeration heat exchange performance is improved.

Further, as shown in fig. 3, the third heat exchange tubes 121 of the rear heat exchanger 12 include a windward heat exchange tube array, a middle heat exchange tube array and a leeward heat exchange tube array, and it is understood that the windward heat exchange tube array, the middle heat exchange tube array and the leeward heat exchange tube array are sequentially arranged in the direction of the airflow. For example, in the example shown in fig. 3, the rear heat exchanger 12 includes three rows of heat exchange tubes, a windward row of heat exchange tubes being located on the windward side of the rear heat exchanger 12, a leeward row of heat exchange tubes being located on the leeward side of the rear heat exchanger 12, and a middle row of heat exchange tubes being located between the windward and leeward rows of heat exchange tubes. The second flow path 4 flows through the windward heat exchange tube, because the airflow velocity of the rear heat exchanger 12 on the windward side is faster than that on the leeward side, the temperature difference between the refrigerant and the airflow is larger on the windward side of the rear heat exchanger 12, the energy efficiency of the heat exchanger assembly 100 is better, because the windward heat exchange tube is located on the windward side of the rear heat exchanger 12, the air volume is adapted to the higher energy of the refrigerant, the second flow path 4 flows through the windward heat exchange tube and then passes through the first main path 51 and the first branch path 52 and the second branch path 53 which are shunted by the first main path 51, and therefore the heat exchange energy efficiency of the heat exchanger assembly 100 is better.

The third flow path 5 flows from the third heat exchange tube 121 in the middle row of heat exchange tubes to the third heat exchange tube 121 in the lee row of heat exchange tubes. It can be understood that a part of the first branch 52, i.e. the first sub-branch 521, and a part of the second branch 53, i.e. the third sub-branch 531 of the third flow path 5 on the rear heat exchanger 12 flow from the third heat exchange tube 121 in the middle row of heat exchange tubes to the third heat exchange tube 121 in the leeward row of heat exchange tubes. Therefore, the possibility that the first branch 52 or the second branch 53 flows to the heat exchange tubes in the leeward column after flowing through the heat exchange tubes in the middle column is avoided, the possibility of changing the flow direction of the refrigerant in the first branch 52 and the second branch 53 is reduced, and the design of two flow paths is simplified. Meanwhile, the rear heat exchanger 12 is enabled to be from the windward side to the leeward side, the temperature of each refrigerant at each position on the same straight line in the length direction of the rear heat exchanger 12 is approximately the same, and the air flow velocity approximately the same at the same straight line is matched, so that the heat exchange energy efficiency of the heat exchanger assembly 100 can be further improved.

In some embodiments of the present invention, as shown in fig. 2 and 3, the fourth flow path 6 includes a sixth branch 61, a seventh branch 62, an eighth branch 63, a ninth branch 64, a tenth branch 65 and an eleventh branch 66, and the sixth branch 61, the seventh branch 62, the eighth branch 63, the ninth branch 64, the tenth branch 65 and the eleventh branch 66 constitute all the first heat exchange tubes 113 and the second heat exchange tubes 114 of the first region 115.

TABLE 2

Number of branches of the fourth flow path	APF
		7	7.30
6	7.45
		5	7.35

As can be seen from table 2, since the heat exchanger assembly 100 has the best heat exchange efficiency by dividing the refrigerant flowing out of the third flow path 5 into 6 paths, the energy efficiency of the heat exchanger is improved by dividing the fourth flow path 6 into six paths, i.e., the sixth path 61, the seventh path 62, the eighth path 63, the ninth path 64, the tenth path 65, and the eleventh path 66. And the branch circuits are relatively more, and the pressure loss is less.

Further, as shown in fig. 2 and 3, when the heat exchanger assembly 100 refrigerates, the refrigerant in each of the sixth, seventh, eighth, ninth, tenth and

eleventh branches

61, 62, 63, 64, 65 and 66 flows from the first heat exchange tube 113 to the second heat exchange tube 114. It will be appreciated that each of the sixth, seventh, eighth, ninth, tenth and

eleventh legs

61, 62, 63, 64, 65 and 66 flow from the windward side to the leeward side of the first region 115.

Therefore, the sixth branch 61, the seventh branch 62, the eighth branch 63, the ninth branch 64, the tenth branch 65 and the eleventh branch 66 can avoid the possibility that all heat exchange tubes on the windward side of the front heat exchanger 11 need to flow to the leeward side heat exchange tubes of the front heat exchanger 11, reduce the possibility that refrigerant in the sixth branch 61, the seventh branch 62, the eighth branch 63, the ninth branch 64, the tenth branch 65 and the eleventh branch 66 needs to change the flow direction of the refrigerant to flow to all the heat exchange tubes on the windward side of the front heat exchanger 11, and simplify the flow path design of the sixth branch 61, the seventh branch 62, the eighth branch 63, the ninth branch 64, the tenth branch 65 and the eleventh branch 66. Meanwhile, the temperature of each refrigerant at each position on the same straight line of the length direction of the front heat exchanger 11 is approximately the same from the windward side to the leeward side, and the air flow velocity approximately the same at the same straight line is matched, so that the heat exchange efficiency of the heat exchanger assembly 100 can be further improved. In addition, a 6-path-dividing form is adopted, branches are added to reduce pressure loss, heat exchange tubes with large pipe diameters are arranged on the lee side according to air quantity attenuation, heat exchange tubes with small pipe diameters are arranged on the windward side, and pressure loss of the inner row is reduced, so that heat exchange performance is improved.

Accordingly, when the heat exchanger assembly 100 heats, the refrigerant in each of the sixth, seventh, eighth, ninth, tenth and

eleventh branches

61, 62, 63, 64, 65 and 66 flows from the second heat exchange tube 114 to the first heat exchange tube 113, and flows from the leeward side to the windward side of the first region 115 of the front heat exchanger 11. It can be understood that, when the heat exchanger assembly 100 heats, the refrigerants entering the sixth branch 61, the seventh branch 62, the eighth branch 63, the ninth branch 64, the tenth branch 65 and the eleventh branch 66 are in a gaseous state, the gaseous refrigerant is changed into a liquid refrigerant through heat dissipation, the gaseous refrigerant has a large volume, and the second heat exchange tube 114 having a large relative tube diameter enters the second heat exchange tube 114, so that the pressure loss caused by an excessively large flow velocity of the refrigerant can be avoided. And referring to table 3, when heating, the refrigerant firstly enters the large pipe diameter and then enters the small pipe diameter, and the refrigerant directly enters the small pipe diameter, so that the energy efficiency is high. Therefore, when the heat exchanger assembly 100 heats, the refrigerant in each of the sixth, seventh, eighth, ninth, tenth and

eleventh branches

61, 62, 63, 64, 65 and 66 flows from the second heat exchange tube 114 to the first heat exchange tube 113, and flows from the leeward side to the windward side of the first region 115 of the front heat exchanger 11, which is energy efficient.

TABLE 3

Further, as shown in fig. 2 and 3, the number of heat exchange tubes in each of the sixth, seventh, eighth, ninth, tenth and

eleventh branches

61, 62, 63, 64, 65 and 66 is the same, and the number of first heat exchange tubes 113 and the number of second heat exchange tubes 114 are the same for each branch. Specifically, in the example shown in fig. 2 and 3, the number of the first heat exchange tubes 113 is two and the number of the second heat exchange tubes 114 is one in each of the sixth, seventh, eighth, ninth, tenth and

eleventh branches

61, 62, 63, 64, 65 and 66. This makes it possible to improve the heat exchange efficiency of the heat exchanger assembly 100, and to simplify the flow path design of the sixth, seventh, eighth, ninth, tenth and

eleventh branches

61, 62, 63, 64, 65 and 66.

The sixth branch 61, the seventh branch 62, the eighth branch 63, the ninth branch 64, the tenth branch 65, and the eleventh branch 66 in the fourth flow path 6 and the third flow path 5 may be connected by a distributor, and the refrigerant flowing out of the third flow path 5 may simultaneously enter the sixth branch 61, the seventh branch 62, the eighth branch 63, the ninth branch 64, the tenth branch 65, and the eleventh branch 66 of the fourth flow path 6, respectively.

In some embodiments of the present invention, as shown in fig. 1, the auxiliary heat exchanger 2 includes a first auxiliary heat exchanger 22 and a second auxiliary heat exchanger 23, the first auxiliary heat exchanger 22 is located on the windward side of the rear heat exchanger 12, and the second auxiliary heat exchanger 23 is located on the windward side of the upper heat exchanging portion 111. The first flow path 3 sequentially passes through the fourth heat exchange tube 21 of the first auxiliary heat exchanger 22 and the fourth heat exchange tube 21 of the second auxiliary heat exchanger 23, or the first flow path 3 sequentially passes through the fourth heat exchange tube 21 of the second auxiliary heat exchanger 23 and the fourth heat exchange tube 21 of the first auxiliary heat exchanger 22. Because the rear heat exchanger 12 and the upper heat exchanger 111 are close to the air inlet 201, the airflow velocity is larger at the position, and the requirement on the temperature difference between the refrigerant and the airflow is higher, the first auxiliary heat exchanger 22 is arranged on the windward side of the rear heat exchanger 12, and the second auxiliary heat exchanger 23 is arranged on the windward side of the upper heat exchanger 111, so that the energy efficiency of the heat exchanger assembly 100 is better.

Optionally, the auxiliary heat exchanger 2 has 1 to 6 fourth heat exchange tubes 21, so that the structure of the auxiliary heat exchanger 2 can be simplified, and the heat exchange effect of the auxiliary heat exchanger 2 can be improved, thereby improving the energy efficiency of the air conditioner.

Further, as shown in fig. 1, the first auxiliary heat exchanger 22 includes two fourth heat exchange pipes 21, the second auxiliary heat exchanger 23 includes one fourth heat exchange pipe 21, and the auxiliary heat exchanger 2 has three fourth heat exchange pipes 21 in total.

In some embodiments of the present invention, the pipe diameter of the fourth heat exchange pipe 21 is 7mm, the pipe diameters of the third heat exchange pipe 121 and the second heat exchange pipe 114 are 6.35mm, and the pipe diameter of the first heat exchange pipe 113 is 5 mm. It can be understood that the heat exchange tubes with the tube diameters of 7mm, 6.35mm and 5mm are widely used in the prior art, so that the heat exchange tubes with the three tube diameters are favorable for reducing the difficulty in obtaining the heat exchange tubes, and the manufacturing cost of the heat exchanger assembly 100 can be reduced while the heat exchange energy efficiency of the heat exchanger assembly 100 is ensured.

In some embodiments of the present invention, in order to achieve improvement in cooling and heating energy saving efficiency, the front heat exchanger 11 has at least three rows of heat exchange tubes in the airflow flowing direction, each row of heat exchange tubes may include at least one of the first heat exchange tube 113 and the second heat exchange tube 114, and/or the rear heat exchanger 12 has at least three rows of the second heat exchange tube 114 in the airflow flowing direction. Therefore, the insufficient heat exchange caused by too few heat exchange tube rows can be avoided, and the waste caused by too many heat exchange tubes can be prevented.

In some embodiments of the present invention, the number of heat exchange tubes of the heat exchanger assembly 100 is more than 40. This enables the heat exchanger assembly 100 to be more energy efficient for heat exchange.

The indoor unit 1000 of the air conditioner according to the embodiment of the present invention includes a housing 200, a wind wheel 300 and the heat exchanger assembly 100.

Specifically, the housing 200 has an air inlet 201 and an air outlet 202, the wind wheel 300 is disposed in the housing 200 to drive the airflow from the air inlet 201 to the air outlet 202, and the heat exchanger assembly 100 is disposed in the housing 200 and located on the air inlet side of the wind wheel 300.

According to the air conditioner indoor unit 1000 of the embodiment of the present invention, by providing the heat exchanger assembly 100, the auxiliary heat exchanger 2 is disposed on the windward side of the main heat exchanger 1, the first heat exchanging pipe 113 and the second heat exchanging pipe 114 are disposed in the front heat exchanger 11, the third heat exchanging pipe 121 is disposed in the rear heat exchanger 12, the fourth heat exchanging pipe 21 is disposed in the auxiliary heat exchanger 2, and the pipe diameter of the fourth heat exchanging pipe 21 is larger than that of the third heat exchanging pipe 121, the pipe diameter of the third heat exchanging pipe 121 is equal to that of the second heat exchanging pipe 114, and the pipe diameter of the second heat exchanging pipe 114 is larger than that of the first heat exchanging pipe 113, when the heat exchanger assembly 100 is used for refrigeration, the refrigerant flows from the fourth heat exchanging pipe 21 of the auxiliary heat exchanger 2 to the first heat exchanging pipe 113, the second heat exchanging pipe 114 and the second heat exchanging pipe 114 of the main heat exchanger 1, such structure and flow path can improve the heat exchange efficiency of the heat exchanger assembly 100 without increasing the length of the heat exchanging pipes and the occupied space of the heat exchanger assembly 100, and meanwhile, the cost can be saved.

In some embodiments of the present invention, the cross-flow wind wheel 300 is selected as the wind wheel 300, and the diameter of the cross-flow wind wheel 300 is 115 mm-128 mm.

Further, the angle between the rear heat exchanger 12 and the vertical direction is less than 48 °, and when the heat exchanger assembly 100 is applied to the indoor unit 1000 of the air conditioner, the rear heat exchanger 12 is made to surround the wind wheel 300, so that the heat exchange energy efficiency of the heat exchanger assembly 100 can be further improved, and meanwhile, the condensation generated on the rear heat exchanger 12 can flow down along the rear heat exchanger 12.

Further, the distance between the main heat exchanger 1 and the wind wheel 300 is more than 10mm, so that the air flow can be driven by the wind wheel 3003 after fully exchanging heat with the main heat exchanger 1, and the possibility of collision between the wind wheel 300 and the main heat exchanger 1 during operation can be reduced.

Further, the width dimension of the casing 200 in the front-rear direction is 800mm or less, and the height dimension of the casing 200 in the up-down direction is 300mm or less, whereby the size of the air conditioning indoor unit 1000 can be made more appropriate, and the overall size of the air conditioning indoor unit 1000 can be reduced.

In some embodiments of the present invention, an included angle is formed between the upper heat exchanging portion 111 and the lower heat exchanging portion 112 of the front heat exchanger 11, and the front heat exchanger 11 protrudes toward the direction away from the wind wheel 300. Referring to table 4, the heat exchanger assembly 100 of the present application is energy efficient relative to a conventional tri-fold heat exchanger.

TABLE 4

Testing conditions and APF (28 machines for example)	Traditional three-fold heat exchanger	The utility model discloses
			Rated refrigeration	5.0	5.85
Intermediate refrigeration	7.27	7.56
			Rated heating	4.85	5.19
Intermediate heating	6.76	7.05
			APF(JISC9612:2005)	6.65	6.96

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A heat exchanger assembly, comprising:

the heat exchanger comprises a main heat exchanger and a heat exchanger body, wherein the main heat exchanger comprises a front heat exchanger and a rear heat exchanger, the front heat exchanger comprises an upper heat exchange part and a lower heat exchange part, the upper end of the upper heat exchange part is connected with the upper end of the rear heat exchanger, the upper end of the lower heat exchange part is integrally connected with the lower end of the upper heat exchange part, the front heat exchanger comprises a first heat exchange tube and a second heat exchange tube, and the rear heat exchanger comprises a third heat exchange tube;

the auxiliary heat exchanger is arranged on the windward side of the main heat exchanger and is provided with a fourth heat exchange tube;

the pipe diameter of the fourth heat exchange pipe is larger than that of the third heat exchange pipe, the pipe diameter of the third heat exchange pipe is equal to that of the second heat exchange pipe, the pipe diameter of the second heat exchange pipe is larger than that of the first heat exchange pipe, and when the heat exchanger assembly refrigerates, a refrigerant flows to the main heat exchanger through the auxiliary heat exchanger.

2. The heat exchanger assembly as claimed in claim 1, wherein lower end portions of the lower and upper heat exchange portions are configured as a first region, and the remaining portion of the upper heat exchange portion is configured as a second region, the first and second regions each including the first and second heat exchange tubes, the second heat exchange tube being located on a leeward side of the first heat exchange tube in the first region, the second heat exchange tube being located on a windward side of the first heat exchange tube in the second region, the heat exchange flow path of the heat exchanger assembly including a first flow path flowing through the fourth heat exchange tube of the auxiliary heat exchanger, a second flow path flowing through a portion of the third heat exchange tube of the rear heat exchanger, a third flow path flowing through the remaining portion of the third heat exchange tube of the rear heat exchanger and the first and second heat exchange tubes of the second region, and a fourth flow path A heat exchange tube through which the fourth flow path flows through the first heat exchange tube and the second heat exchange tube of the first region,

when the heat exchanger assembly is used for refrigerating, a refrigerant flows through the first flow path, the second flow path, the third flow path and the fourth flow path in sequence.

3. The heat exchanger assembly of claim 2, wherein the first zone and the second zone each have three rows of heat exchange tubes, the first zone comprising two rows of the first heat exchange tubes on a windward side and one row of the second heat exchange tubes on a leeward side, the second zone comprising two rows of the second heat exchange tubes on a windward side and one row of the first heat exchange tubes on a leeward side.

4. The heat exchanger assembly of claim 2 or 3, wherein the third flow path comprises a first main path flowing through the second heat exchange tube of the second zone, a first leg, a second leg, a third leg, a fourth leg, and a fifth leg, the first main path and the second leg both flowing through the first heat exchange tube and the second heat exchange tube of the second zone, the first main path, the first leg, and the second leg constituting all of the first heat exchange tube and the second heat exchange tube of the second zone, the third leg, the fourth leg, and the fifth leg constituting the remaining third heat exchange tubes of the rear heat exchanger,

when the heat exchanger assembly is used for refrigerating, a refrigerant flows through the first main path and then is simultaneously divided into the first branch path and the second branch path, and the first branch path and the second branch path are converged and then simultaneously divided into the third branch path, the fourth branch path and the fifth branch path.

5. The heat exchanger assembly of claim 2 or 3, wherein the third flow path comprises a first major path flowing through the second heat exchange tubes of the second zone, a first minor path flowing through a portion of the third heat exchange tubes of the rear heat exchanger and the second and first heat exchange tubes of the second zone, and a second minor path flowing through the remaining portion of the third heat exchange tubes of the rear heat exchanger and the remaining portion of the second and first heat exchange tubes of the second zone,

when the heat exchanger assembly is used for refrigerating, refrigerant flows through the first main path and then is simultaneously divided into the first branch path and the second branch path.

6. The heat exchanger assembly of claim 5, wherein the first branch comprises a first sub-branch and a second sub-branch, the first sub-branch flows through a portion of the third heat exchange tubes of the rear heat exchanger, the second sub-branch flows through a portion of the second heat exchange tubes of the second zone and a portion of the first heat exchange tubes, and a refrigerant flows through the first sub-branch and the second sub-branch in sequence when the heat exchanger assembly is refrigerating,

and/or the second branch comprises a third sub-branch and a fourth sub-branch, the third sub-branch flows through the rest part of the third heat exchange tube of the rear heat exchanger, the fourth sub-branch flows through the rest part of the second area, the second heat exchange tube and the rest part of the first heat exchange tube, and when the heat exchanger assembly is used for refrigerating, a refrigerant sequentially flows through the third sub-branch and the fourth sub-branch.

7. The heat exchanger assembly of claim 2 or 3, wherein the third heat exchange tubes of the rear heat exchanger comprise a windward column of heat exchange tubes through which the second flow path flows, a middle column of heat exchange tubes through which the third flow path flows from the third one of the middle column of heat exchange tubes to the third one of the leeward column of heat exchange tubes.

8. The heat exchanger assembly according to claim 2 or 3, wherein the fourth flow path comprises a sixth leg, a seventh leg, an eighth leg, a ninth leg, a tenth leg, and an eleventh leg, the sixth leg through the eleventh leg constituting all of the first heat exchange tube and the second heat exchange tube of the first zone.

9. The heat exchanger assembly as claimed in claim 8, wherein the refrigerant in each of the sixth to eleventh branches flows from the first heat exchange tube to the second heat exchange tube when the heat exchanger assembly is refrigerating.

10. The heat exchanger assembly of claim 1, wherein the auxiliary heat exchanger comprises a first auxiliary heat exchanger and a second auxiliary heat exchanger, the first auxiliary heat exchanger being located upwind of the rear heat exchanger, the second auxiliary heat exchanger being located upwind of the upper heat exchange portion.

11. The heat exchanger assembly as claimed in claim 1 or 10, wherein said auxiliary heat exchanger has 1 to 6 of said fourth heat exchange tubes.

12. The heat exchanger assembly of claim 1, wherein the fourth heat exchange tube has a tube diameter of 7mm, the third heat exchange tube and the second heat exchange tube have a tube diameter of 6.35mm, and the first heat exchange tube has a tube diameter of 5 mm.

13. The heat exchanger assembly of claim 1, wherein the number of heat exchange tubes of the heat exchanger assembly is 40 or more.

14. An indoor unit of an air conditioner, comprising the heat exchanger assembly as recited in any one of claims 1 to 13.