WO2021103827A1 - Heat exchanger assembly and air conditioner indoor unit having same - Google Patents

Abstract

A heat exchanger assembly (1) and an air conditioner indoor unit (1000) provided with same. The heat exchanger assembly (1) comprises: a main heat exchanger (10), which comprises a front heat exchanger (10a) and a rear heat exchanger (13), the front heat exchanger (10a) comprising a first heat exchange tube (110), and the rear heat exchanger (13) comprising a second heat exchange tube (130); and an auxiliary heat exchanger, (20) which is provided on the windward side of the main heat exchanger (10), the auxiliary heat exchanger (20) being provided with a third heat exchange tube (201). When the heat exchanger assembly (1) is cooling, a refrigerant flows from the third heat exchange tube (201) of the auxiliary heat exchanger (20) to the first heat exchange tube (110) and the second heat exchange tube (130) of the main heat exchanger (10).

Description

Heat exchanger assembly and air conditioner indoor unit with same

Cross-references to related applications

This application is filed based on a Chinese patent application with an application number of 201922097151.4 and an application date of November 28, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference into this application.

Technical field

This application belongs to the technical field of air treatment equipment, and specifically relates to a heat exchanger assembly and an air conditioner indoor unit having the same.

Background technique

In related technologies, in order to improve energy efficiency of the evaporator, the length of the heat exchange tube is generally increased, and accordingly, the size of the internal machine will also increase.

Summary of the invention

This application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a heat exchanger assembly, which saves production man-hours and thereby reduces costs, and can improve the heat exchange energy efficiency of the heat exchanger assembly without increasing the installation space of the heat exchanger assembly.

This application also proposes an air conditioner indoor unit, which includes the above-mentioned heat exchanger assembly.

The heat exchanger assembly according to the embodiments of the present application includes: a main heat exchanger, the main heat exchanger includes a front heat exchanger and a rear heat exchanger, the front heat exchanger includes an upper heat exchange part and a lower heat exchange part, the upper heat exchanger The upper end of the heat 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 includes a first heat exchange tube, and the rear heat exchanger includes a second heat exchange tube ; Auxiliary heat exchanger, the auxiliary heat exchanger is arranged on the windward side of the main heat exchanger, the auxiliary heat exchanger has a third heat exchange tube; when the heat exchanger assembly is cooled, the refrigerant is exchanged by the third heat exchanger of the auxiliary heat exchanger The tubes flow to the first heat exchange tube and the second heat exchange tube of the main heat exchanger.

According to the heat exchanger assembly of the embodiment of the present application, the lower heat exchange part and the upper heat exchange part are integrated, which can reduce the production difficulty of the lower heat exchange part and the upper heat exchange part, and at the same time facilitate the integration of the heat exchanger assembly Assembly saves man-hours and reduces production costs. At the same time, the auxiliary heat exchanger is arranged on the windward side of the main heat exchanger, and when the heat exchanger assembly is cooled, the refrigerant flows from the third heat exchange tube of the auxiliary heat exchanger to the first heat exchange tube and the main heat exchanger of the main heat exchanger. The second heat exchange tube, such a structure and flow path can improve the heat exchange energy efficiency of the heat exchanger assembly without increasing the length of the heat exchange tube and without increasing the space occupied by the heat exchanger assembly.

According to some embodiments of the present application, the inner diameter of the first heat exchange tube is smaller than the inner diameter of the second heat exchange tube, the inner diameter of the second heat exchange tube is smaller than the inner diameter of the third heat exchange tube, and the heat exchange flow path of the heat exchanger assembly includes The first flow path, the second flow path, the third flow path and the fourth flow path, the first flow path flows through the third heat exchange tube of the auxiliary heat exchanger, and the second flow path flows through the second heat exchange of the rear heat exchanger The fourth flow path flows through the first heat exchange tube of the front heat exchanger. When the heat exchanger assembly is cooled, the refrigerant flows through the first flow path, the second flow path, the third flow path and the fourth flow path in sequence.

According to some embodiments of the present application, the inner diameter of the third heat exchange tube is 7 mm, the inner diameter of the second heat exchange tube is 6 mm, and the inner diameter of the first heat exchange tube is 5 mm.

According to some embodiments of the present application, the auxiliary heat exchanger includes a first auxiliary heat exchanger and a second auxiliary heat exchanger, the first auxiliary heat exchanger is located on the windward side of the rear heat exchanger, and the second auxiliary heat exchanger is located below On the windward side of the heat exchange part, the first flow path includes a first sub flow path and a second sub flow path. The first sub flow path flows through the third heat exchange tube of the first auxiliary heat exchanger, and the second sub flow path flows through In the third heat exchange tube of the second auxiliary heat exchanger, when the heat exchanger assembly is cooled, the refrigerant flows through the first sub-flow path and the second sub-flow path in sequence.

According to some embodiments of the present application, the second flow path includes a first main path and a first branch, a second branch, and a third branch that are branched from the first main path. The first main path and the first branch The second branch and the third branch constitute all the second heat exchange tubes of the rear heat exchanger. When the heat exchanger assembly is cooled, the refrigerant flows through the first main circuit and simultaneously divides into the first branch and the second branch. Branch road and third branch road.

According to some embodiments of the present application, the second heat exchange tube of the rear heat exchanger includes upwind row heat exchange tubes, the first main path flows through the upwind row heat exchange tubes, the first branch, the second branch, and the third branch The circuit constitutes the remaining second heat exchange tubes on the rear heat exchanger.

According to some embodiments of the present application, the rear heat exchanger further includes a middle row of heat exchange tubes and a leeward row of heat exchange tubes, and the upwind row of heat exchange tubes, the middle row of heat exchange tubes, and the leeward row of heat exchange tubes are arranged in sequence along the flow direction of the airflow. , The first branch, the second branch and the third branch all flow from the second heat exchange tube in the middle row of heat exchange tubes to the second heat exchange tube in the leeward row of heat exchange tubes.

According to some embodiments of the present application, the number of second heat exchange tubes in the first branch, the second branch, and the third branch is the same.

According to some embodiments of the present application, the first main circuit and the first branch circuit, the second branch circuit, and the third branch circuit are connected by a first distributor.

According to some embodiments of the application, the fourth flow path includes: the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch, and the tenth branch. The six branches, the seventh branch, the eighth branch, the ninth branch and the tenth branch constitute all the first heat exchange tubes of the front heat exchanger, and the fifth branch, the sixth branch and the seventh branch The eighth branch, the ninth branch and the tenth branch all flow 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.

According to some embodiments of the present application, the number of the first heat exchange tubes in the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch, and the tenth branch are the same.

According to some embodiments of the present application, the third flow path is connected to the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch, and the tenth branch through a second distributor.

According to some embodiments of the present application, the front heat exchanger has at least three rows of first heat exchange tubes in the air flow direction, and/or the rear heat exchanger has at least three rows of second heat exchange tubes in the air flow direction.

According to some embodiments of the present application, the number of heat exchange tubes of the main heat exchanger is more than 30.

The air conditioner indoor unit according to the embodiment of the present application includes: a housing with an air inlet and an air outlet; a wind wheel, the wind wheel is arranged in the housing to drive airflow from the air inlet to the The air outlet; the heat exchanger assembly described above, the heat exchanger assembly is provided in the housing and located on the air inlet side of the wind wheel, the connecting portion of the front heat exchanger and the rear heat exchanger It is the part of the main heat exchanger closest to the air inlet.

According to the air conditioner indoor unit of the embodiment of the present application, the lower heat exchange part and the upper heat exchange part are integrated, which can reduce the production difficulty of the lower heat exchange part and the upper heat exchange part, and at the same time facilitate the overall assembly of the heat exchanger components , Saving man-hours, thereby reducing production costs. At the same time, the auxiliary heat exchanger is arranged on the windward side of the main heat exchanger, and when the heat exchanger assembly is cooled, the refrigerant flows from the third heat exchange tube of the auxiliary heat exchanger to the first heat exchange tube and the main heat exchanger of the main heat exchanger. The second heat exchange tube, such a structure and flow path can improve the heat exchange energy efficiency of the heat exchanger assembly without increasing the length of the heat exchange tube and without increasing the space occupied by the heat exchanger assembly, thereby making it possible to increase the heat exchange efficiency of the heat exchanger assembly without increasing the air-conditioning room. The overall size of the air conditioner can increase the heat exchange energy efficiency of the indoor unit of the air conditioner.

According to some embodiments of the present application, the air inlet is provided on the upper side of the housing, and the rear heat exchanger and the upper heat exchange part are formed in a side view to cover the wind wheel from above. Inverted V shape.

According to some embodiments of the present application, the lower heat exchange part, the upper heat exchange part, and the rear heat exchanger at least partially surround the wind wheel, and the lower heat exchange part is arranged at the bottom of the wind wheel. The upper heat exchange part is arranged on the front and upper part of the wind wheel, and is located between the lower heat exchange part and the air inlet. The upper end of the upper heat exchange part is inclined to the rear, and the lower end is The upper end of the lower heat exchange part is connected, the rear heat exchanger is arranged above and behind the wind wheel, the upper end is inclined to the front, and is connected with the upper end of the upper heat exchange part.

According to some embodiments of the present application, the angle between the rear heat exchanger and the vertical direction is 48° or less.

According to some embodiments of the present application, the distance between the main heat exchanger and the wind wheel is more than 10 mm.

According to some embodiments of the present application, the width dimension of the housing in the front and rear direction is less than 800 mm, and the height dimension of the housing in the vertical direction is less than 300 mm.

The additional aspects and advantages of the present application will be partly given in the following description, and part of them will become obvious from the following description, or be understood through the practice of the present application.

Description of the drawings

Fig. 1 is a schematic cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present application;

Fig. 2 is a schematic diagram of a flow path arrangement of a heat exchanger assembly according to an embodiment of the present application.

Reference signs:

Heat exchanger assembly 1, main heat exchanger 10, front heat exchanger 10a,

Lower heat exchange part 11, first heat exchange tube 110, fifth branch 111, sixth branch 112,

Upper heat exchange part 12, seventh branch 121, eighth branch 122, ninth branch 123, tenth branch 124,

Rear heat exchanger 13, second heat exchange tube 130, first main circuit 131, first branch circuit 132, second branch circuit 133, third branch circuit 134, windward column heat exchange tube a, middle column heat exchange tube b , The leeward column heat exchange tube c,

Transition pipe 14,

Auxiliary heat exchanger 20, third heat exchange tube 201, first auxiliary heat exchanger 20a, second auxiliary heat exchanger 20b, first distributor 30, second distributor 40,

The first flow path A, the first sub flow path A1, the second sub flow path A2, the second flow path B, the third flow path C, the fourth flow path D,

The air conditioner indoor unit 1000, the housing 2, the wind wheel 3, and the air outlet 21.

Detailed ways

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present application, and should not be construed as a limitation to the present application.

Hereinafter, the heat exchanger assembly 1 and the air conditioner indoor unit 1000 according to the embodiments of the present application will be described with reference to the accompanying drawings.

As shown in FIG. 1, an air conditioner indoor unit 1000 according to an embodiment of the present invention includes a housing 2, a wind wheel 3 and a heat exchanger assembly 1. The air conditioner indoor unit 1000 is an indoor unit of a wall-mounted split air conditioner, but it may also be an indoor unit or an indoor unit of other air conditioners, which is not limited here.

Specifically, referring to FIG. 1, the housing 2 has an air inlet and an air outlet 21, the air inlet is provided on the upper side of the housing 2, and the air outlet 21 is provided on the lower side of the housing 2. Generally speaking, the width dimension of the housing 2 in the front and rear direction is 800 mm or less, and the height dimension of the housing 2 in the vertical direction is 300 mm or less. The wind wheel 3 is arranged in the housing 2 to drive the air flow from the air inlet to the air outlet 21. The wind wheel 3 is a tubular wind wheel, but it may also be another wind wheel, such as an axial wind wheel.

As shown in FIG. 1, an embodiment of the present application is that the heat exchanger assembly 1 is applied to a wall-mounted air conditioner indoor unit 1000. The air conditioner indoor unit 1000 includes a housing 2 and a wind wheel 3 located in the housing 2. The heat exchanger assembly 1 is arranged in the housing 2 and located on the air inlet side of the wind wheel 3 to exchange heat for the air sucked in by the wind wheel 3, wherein the wind wheel 3 may be a through-flow wind wheel.

It is understandable that the heat exchanger assembly 1 can be applied to an air conditioner integrated machine or an air conditioner indoor unit 1000 or an air conditioner outdoor unit.

As shown in FIG. 1, the heat exchanger assembly 1 according to the embodiment of the present application includes: a main heat exchanger 10 and an auxiliary heat exchanger 20.

Specifically, the main heat exchanger 10 includes a front heat exchanger 10a and a rear heat exchanger 13, and the front heat exchanger 10a includes an upper heat exchange part 12 and a lower heat exchange part 11. The upper end of the upper heat exchange part 12 exchanges heat with the rear heat exchanger. The upper end of the device 13 is connected, and the upper end of the lower heat exchange part 11 is integrally connected with the lower end of the upper heat exchange part 12. Among them, the integral connection of the lower heat exchange part 11 and the upper heat exchange part 12 means that the fins on the lower heat exchange part 11 and the upper heat exchange part 12 are an integral piece, and each fin includes a front portion of the lower heat exchange part 11 The heat exchange area and the middle heat exchange area located on the upper heat exchange part 12, the lower heat exchange part 11 and the upper heat exchange part 12 as a whole, which can reduce the production of the lower heat exchange part 11 and the upper heat exchange part 12 Difficulty, while facilitating the overall assembly of the heat exchanger assembly 1, saving man-hours, and thereby reducing production costs.

In order to better adapt to the shape of the wind wheel 3 and to be closer to the wind wheel 3, the inner surface of the front heat exchanger 10a can be set to be a forward convex arc design, and the inner side of the rear heat exchanger 13 can be set to be convex backward. The arc surface setting makes the air flow through the heat exchanger assembly 1 smoother. Under the same operating power of the wind wheel 3, this design can make the air flow through the heat exchanger assembly 1 have a greater flow rate, thereby improving heat exchange The heat exchange energy efficiency of the device component 1.

The lower heat exchange part 11, the upper heat exchange part 12 and the rear heat exchanger 13 at least partially surround the wind wheel 3, the lower heat exchange part 11 is arranged in front of and below the wind wheel 3, and the upper heat exchange part 12 is arranged in the wind wheel 3 The upper part of the front is located between the lower heat exchange part 11 and the air inlet. The upper end of the upper heat exchange part 12 is inclined to the rear, and the lower end is connected to the upper end of the lower heat exchange part 11, and the rear heat exchanger 13 is arranged above the rear of the wind wheel 3. , The upper end is inclined to the front, and is connected with the upper end of the upper heat exchange part 12.

The rear heat exchanger 13 and the upper heat exchange part 12 are formed in a substantially inverted V shape covering the wind wheel 3 from above in a side view. The connection part of the front heat exchanger 10a and the rear heat exchanger 13 is the part of the main heat exchanger 10 closest to the air inlet. Specifically, the distance between the connecting part of the rear heat exchanger 13 and the upper heat exchange part 12 and the air inlet is shorter than the distance between any other part of the main heat exchanger 10 and the air inlet.

It is understandable that, as shown in FIG. 1, the side facing the user after the assembly of the air-conditioning indoor unit 1000 is the front, and the side facing the wall is the rear, while the wall-mounted air-conditioning indoor unit 1000 adopts a conventional upper air inlet and a lower air inlet. The structure of the air outlet 21 is provided, that is, the heat exchanger assembly 1 is located upstream of the wind wheel 3.

The front heat exchanger 10 a includes a first heat exchange tube 110, and the rear heat exchanger 13 includes a second heat exchange tube 130. The auxiliary heat exchanger 20 is arranged on the windward side of the main heat exchanger 10, as shown in FIG. 1, along the air flow direction, the windward side of the main heat exchanger 10 is upstream of the main heat exchanger 10, and the auxiliary heat exchanger 20 The arrangement on the windward side of the main heat exchanger 10 can increase the heat exchange capacity of the heat exchanger assembly 1. The auxiliary heat exchanger 20 has a third heat exchange tube 201. According to the arrangement of the wind field, the airflow flows faster near the air inlet, while at a position far from the air inlet, the airflow is relatively slow. When the temperature difference between the local refrigerant and the airflow is slower than the airflow is slower, the heat exchanger assembly 1 has better heat exchange energy efficiency when the temperature difference between the refrigerant and the airflow is greater. Therefore, when the heat exchanger assembly 1 is cooling, the part of the heat exchanger assembly 1 close to the air inlet flows to the part far away from the heat exchanger assembly 1. The heat exchange energy efficiency of the heat exchanger assembly 1 is better. 1 During cooling, the refrigerant flows from the third heat exchange tube 201 of the auxiliary heat exchanger 20 to the first heat exchange tube 110 and the second heat exchange tube 130 of the main heat exchanger 10, which can make the heat exchange energy efficiency of the heat exchanger assembly 1. better.

According to the heat exchanger assembly 1 of the embodiment of the present application, the lower heat exchange part 11 and the upper heat exchange part 12 are taken as a whole, which can reduce the production difficulty of the lower heat exchange part 11 and the upper heat exchange part 12, and at the same time facilitate the exchange The overall assembly of the heat exchanger assembly 1 saves man-hours and thereby reduces production costs. At the same time, the auxiliary heat exchanger 20 is provided on the windward side of the main heat exchanger 10, and when the heat exchanger assembly 1 is cooled, the refrigerant flows from the third heat exchange tube 201 of the auxiliary heat exchanger 20 to the main heat exchanger 10 The first heat exchange tube 110 and the second heat exchange tube 130, such a structure and flow path can improve the heat exchange of the heat exchanger assembly 1 without increasing the length of the heat exchange tube and without increasing the space occupied by the heat exchanger assembly 1 Thermal energy efficiency.

As can be seen in Table 1, it is the influence of the flow direction of the refrigerant in different pipe diameters on the energy efficiency (APF) during heating. When 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 that flows through the large-diameter pipeline first and then through the small-diameter pipeline; on the contrary, when cooling, the refrigerant first flows through the pipeline. After flowing through the large-diameter pipeline, it flows into the small-diameter pipeline, which is more energy efficient than the refrigerant flowing through the small-diameter pipeline first and then through the large-diameter pipeline. The diameter of the refrigerant is gradually reduced during the process of the refrigerant from gas to liquid. The wall surface of the heat pipe contacts the heat transfer area.

Table 1

Combined pipe diameter refrigerant flow direction	APF
When heating, enter the small pipe diameter first and then aggregate into the large pipe diameter	7.45
When heating, it first enters the large pipe diameter and then splits into the small pipe diameter	7.15

Therefore, in some embodiments of the present application, the inner diameter of the first heat exchange tube 110 is smaller than the inner diameter of the second heat exchange tube 130, and the inner diameter of the second heat exchange tube 130 is smaller than the inner diameter of the third heat exchange tube 201, thereby The heat exchange energy efficiency of the heat exchanger component 1 is better. In addition, the use of small-diameter heat exchange tubes can reduce the material used for the heat exchange tubes, thereby significantly reducing the overall cost of the heat exchanger assembly 1. However, when the refrigerant passes through the small-diameter heat exchange tubes, the heat exchange resistance is large and the pressure loss It is not conducive to the circulation of the refrigerant. The cost of the heat exchanger assembly 1 and the efficiency of the refrigerant circulation flow need to be considered comprehensively. Therefore, the inner diameter of the first heat exchange tube 110 is set to be smaller than the inner diameter of the second heat exchange tube 130, and the inner diameter of the second heat exchange tube 130 is smaller than the inner diameter of the third heat exchange tube 201, which can ensure the heat exchange of the heat exchanger assembly 1. The thermal energy efficiency is better and the production cost of the heat exchanger assembly 1 is reduced.

The heat exchange flow path of the heat exchanger assembly 1 includes a first flow path A, a second flow path B, a third flow path C, and a fourth flow path D. The first flow path A flows through the third heat exchange of the auxiliary heat exchanger 20 Tube 201, the second flow path B flows through the second heat exchange tube 130 of the rear heat exchanger 13, and the fourth flow path D flows through the first heat exchange tube 110 of the front heat exchanger 10a, and is cooled in the heat exchanger assembly 1. When the refrigerant flows through the first flow path A, the second flow path B, the third flow path C, and the fourth flow path D in sequence, the refrigerant first flows through the large-diameter pipeline and then flows into the small-diameter pipeline, so that the heat exchanger assembly 1 The heat exchange energy efficiency is better.

It should be noted that the third flow path C may be the transition pipe 14 connected between the second flow path B and the fourth flow path D. For example, when the heat exchanger assembly 1 further includes a second distributor 40, The third flow path C may be a transition pipe 14 connected between the second flow path B and the second distributor 40. Generally, the heat exchange tubes in the heat exchanger assembly 1 are copper tubes.

Further, the inner diameter of the third heat exchange tube 201 is 7 mm, the inner diameter of the second heat exchange tube 130 is 6 mm, and the inner diameter of the first heat exchange tube 110 is 5 mm. As shown in Table 2, when the inner diameter of the second heat exchange tube 130 is 6 mm, the heat exchange energy efficiency of the heat exchanger assembly 1 is better than when the inner diameter of the second heat exchange tube 130 is 5 mm. It is understandable that the tube diameter of 7mm, the tube diameter of 6mm, and the tube diameter of 5mm are all heat exchange tubes that are widely used in the prior art. Therefore, these three tube diameters are used. The heat exchange tube is beneficial to reduce the difficulty of obtaining the heat exchange tube, and can reduce the manufacturing cost of the heat exchanger assembly 1 while ensuring the heat exchange energy efficiency of the heat exchanger assembly 1.

Table 2

The inner diameter of the second heat exchange tube 130	APF
6mm	7.35
5mm	7.15

Further, as shown in Figure 1, the auxiliary heat exchanger 20 includes a first auxiliary heat exchanger 20a and a second auxiliary heat exchanger 20b. The first auxiliary heat exchanger 20a is located on the windward side of the rear heat exchanger 13, and the second The auxiliary heat exchanger 20b is located on the windward side of the lower heat exchange part 11. Since the rear heat exchanger 13 is close to the air inlet, the airflow velocity is greater here, and the requirements for the temperature difference between the refrigerant and the airflow are higher. Therefore, the rear heat exchanger 13 The arrangement of the first auxiliary heat exchanger 20a on the windward side can make the energy efficiency of the heat exchanger assembly 1 better, and because the number of the first heat exchange tubes 110 in the lower heat exchange part 11 is less, and the first heat exchange tubes 110 The pipe diameter is the smallest and the heat exchange capacity is low. The second auxiliary heat exchanger 20b is arranged on the windward side of the lower heat exchange part 11, which can significantly increase the heat exchange energy efficiency of the heat exchanger assembly 1. However, the application is not limited to this. In this embodiment, as can be seen in Figures 1 and 2, the size and shape of the fin area of the rear heat exchanger 13 and the size and shape of the fin of the upper heat exchange portion 12 are not much different, and the rear The number of the second heat exchange tubes 130 of the heat exchanger 13 is not much different from the number of the first heat exchange tubes 110 of the upper heat exchange part 12, and the rear heat exchanger 13 and the upper heat exchange part 12 are both close to the air inlet Therefore, the first auxiliary heat exchanger 20a may also be provided on the windward side of the upper heat exchange part 12. Of course, the first auxiliary heat exchanger 20a can also be provided on the windward side of the rear heat exchanger 13 and the windward side of the upper heat exchange portion 12 at the same time. The first flow path A includes a first sub flow path A1 and a second sub flow path A2. The first sub flow path A1 flows through the third heat exchange tube 201 of the first auxiliary heat exchanger 20a, and the second sub flow path A2 flows through The third heat exchange tube 201 of the second auxiliary heat exchanger 20b, because the first auxiliary heat exchanger 20a is closer to the air inlet than the second auxiliary heat exchanger 20b, the air flow velocity is larger, and the temperature difference between the refrigerant and the air flow is required Larger, when the heat exchanger assembly 1 is cooling, the refrigerant flows through the first sub-flow path A1 and the second sub-flow path A2 in sequence, which can make the heat exchange energy efficiency of the heat exchanger assembly 1 better.

Further, as shown in FIG. 2, the second flow path B includes a first main path 131 and a first branch path 132, a second branch path 133, and a third branch path 134 divided from the first main path 131. A main circuit 131, a first branch circuit 132, a second branch circuit 133 and a third branch circuit 134 constitute all the second heat exchange tubes 130 of the rear heat exchanger 13. When the heat exchanger assembly 1 is cooling, the refrigerant flows through the first After the first main path 131 is divided into the first branch 132, the second branch 133 and the third branch 134 at the same time, the refrigerant is divided after flowing through the first main path 131 to enable the heat exchange of the heat exchanger assembly 1 Energy efficiency is better.

Further, as shown in FIG. 1, the second heat exchange tube 130 of the rear heat exchanger 13 includes upwind row heat exchange tubes a, middle row heat exchange tubes b, and leeward row heat exchange tubes c. Upwind row heat exchange tubes a, The middle row of heat exchange tubes b and the leeward row of heat exchange tubes c are arranged in sequence along the flow direction of the airflow. The first main path 131 flows through the windward column heat exchange tube a. Since the airflow velocity on the windward side of the rear heat exchanger 13 is faster than that on the leeward side, the temperature difference between the refrigerant and the airflow is required on the windward side of the rear heat exchanger 13 Larger, the heat exchanger assembly 1 has better energy efficiency. Since the heat exchange tube a of the upwind train is at the windward position of the rear heat exchanger 13, the air volume is adapted to the higher energy of the refrigerant, and the first main path 131 flows through the upwind train for exchange. The heat pipe a is first subcooled and then divided into the first branch 132, the second branch 133 and the third branch 134. The first branch 132, the second branch 133 and the third branch 134 constitute the rear heat exchanger The remaining second heat exchange tubes 130 on 13 can thereby make the heat exchange energy efficiency of the heat exchanger assembly 1 better.

Further, as shown in FIG. 1, the first branch 132, the second branch 133, and the third branch 134 all flow from the second heat exchange tube 130 in the middle row of heat exchange tubes b to the leeward row of heat exchange tubes c. The second heat exchange tube 130 avoids the possibility that the first branch 132 or the second branch 133 or the third branch 134 flows to the leeward column heat exchange tube c after flowing through the middle column heat exchange tube b. The possibility of changing the flow direction of the refrigerant in the first branch 132, the second branch 133 and the third branch 134 is reduced, and the design of the three flow paths is simplified. At the same time, the rear heat exchanger 13 is made to go from the windward side to the leeward side, and the refrigerant temperature on the same straight line in the longitudinal direction of the rear heat exchanger 13 is approximately the same, matching the roughly the same airflow velocity on the same straight line, thereby further improving heat exchange The heat exchange energy efficiency of the device component 1.

Further, the number of the second heat exchange tubes 130 in the first branch 132, the second branch 133, and the third branch 134 are the same. Generally, the difference between the number of heat exchange tubes of two adjacent branches is less than or equal to 3, and the heat exchange energy efficiency is better. The first branch 132, the second branch 133, and the third branch 134 are The number of the second heat exchange tubes 130 is set to the same number, which can further simplify the design of the flow path on the premise that the heat exchange energy efficiency is better.

Further, as shown in FIG. 2, the first main road 131 and the first branch 132, the second branch 133, and the third branch 134 are connected by the first distributor 30, thereby enabling the first main road 131 to flow out After being collected by the first distributor 30, the refrigerant flows into the first branch 132, the second branch 133, and the third branch 134 at the same time.

Further, as shown in FIG. 2, the fourth flow path D includes: a fifth branch 111, a sixth branch 112, a seventh branch 121, an eighth branch 122, a ninth branch 123, and a tenth branch. 124, the fifth branch 111, the sixth branch 112, the seventh branch 121, the eighth branch 122, the ninth branch 123 and the tenth branch 124 constitute all the first heat exchange tubes of the front heat exchanger 10a 110, and the fifth branch 111, the sixth branch 112, the seventh branch 121, the eighth branch 122, the ninth branch 123, and the tenth branch 124 are all from the first branch on the windward side of the front heat exchanger 10a. The heat exchange tube 110 flows to the first heat exchange tube 110 on the leeward side of the forward heat exchanger 10a.

table 3

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

It can be seen from Table 3 that the refrigerant flowing out of the rear heat exchanger 13 is divided into 6 paths, and the heat exchange energy efficiency of the heat exchanger assembly 1 is the best. Therefore, the fourth flow path D is divided into six paths. And the fifth branch 111, the sixth branch 112, the seventh branch 121, the eighth branch 122, the ninth branch 123 and the tenth branch 124 are all from the first heat exchange on the windward side of the front heat exchanger 10a The tube 110 flows into the first heat exchange tube 110 on the leeward side of the forward heat exchanger 10a, thereby enabling the fifth branch 111, the sixth branch 112, the seventh branch 121, the eighth branch 122, and the ninth branch to be The branch 123 and the tenth branch 124 can avoid the possibility that all the first heat exchange tubes 110 on the windward side of the front heat exchanger 10a need to be flowed before they can flow to the first heat exchange tube 110 on the leeward side of the forward heat exchanger 10a. This reduces the possibility that the refrigerant in the six branches needs to change the flow direction of the refrigerant in order to flow through all the first heat exchange tubes 110 on the windward side of the front heat exchanger 10a, and simplifies the flow path design of the six branches. At the same time, the front heat exchanger 10a is made from the windward side to the leeward side, and the refrigerant temperature on the same straight line in the length direction of the front heat exchanger 10a is approximately the same, matching the roughly the same air flow velocity on the same straight line, thereby further improving heat exchange The heat exchange energy efficiency of the device component 1.

Further, the numbers of the first heat exchange tubes 110 in the fifth branch 111, the sixth branch 112, the seventh branch 121, the eighth branch 122, the ninth branch 123, and the tenth branch 124 are the same. As shown in Table 4, the heat exchange of the six branches of the fifth branch 111, the sixth branch 112, the seventh branch 121, the eighth branch 122, the ninth branch 123 and the tenth branch 124 The number of tubes is set to the same number, the heat exchange energy efficiency of the heat exchanger assembly 1 is better, and the flow path design of the six branches can be simplified.

Table 4

Distribution method of branch copper tube number	APF
4+4+4+4+4+4	7.45
4+3+5+4+4+4	7.40

4+4+3+5+4+4	7.42
4+4+4+3+5+4	7.36
4+4+4+4+3+5	7.35

Further, as shown in FIG. 2, the third flow path C is related to the fifth branch 111, the sixth branch 112, the seventh branch 121, the eighth branch 122, the ninth branch 123, and the tenth branch 124. By connecting through the second distributor 40, the refrigerant flowing out from the rear heat exchanger 13 can be collected into the second distributor 40, and the second distributor 40 can divide the corresponding number of flow paths.

In some embodiments of the present application, the front heat exchanger 10a has at least three rows of first heat exchange tubes 110 in the air flow direction, and/or, the rear heat exchanger 13 has at least three rows of second heat exchange tubes 110 in the air flow direction. The heat exchange tube 130 can thereby prevent insufficient heat exchange due to too few rows of heat exchange tubes, and prevent excessive heat exchange tubes from being wasteful.

According to some embodiments of the present application, the number of heat exchange tubes of the main heat exchanger 10 is more than 30, which can make the heat exchange energy efficiency of the heat exchanger assembly 1 better.

In this embodiment, the wind wheel 3 is a cross-flow wind wheel whose diameter is between 115mm and 128mm. On the basis of this structure, in order to make the air conditioner indoor unit 1000 have higher heat exchange energy efficiency, the heat exchanger assembly The number of heat exchange tubes in 1 is not less than 30.

Further, the angle between the rear heat exchanger 13 and the vertical direction is 48° or less. When the heat exchanger assembly 1 is applied to the air conditioner indoor unit 1000, the rear heat exchanger 13 half surrounds the wind wheel 3, which can The heat exchange energy efficiency of the heat exchanger assembly 1 is further improved, and at the same time, the condensation generated on the rear heat exchanger 13 can flow down the rear heat exchanger 13.

Further, the distance between the main heat exchanger 10 and the wind wheel 3 is 10 mm or more, which can make the airflow and the main heat exchanger 10 fully exchange heat before being driven away by the wind wheel 3, thereby reducing the wind The possibility of collision with the main heat exchanger 10 when the wheel 3 is running.

Further, the width dimension of the casing 2 in the front and rear direction is 800 mm or less, and the height dimension of the casing 2 in the vertical direction is 300 mm or less, which can make the size of the air conditioner indoor unit 1000 more suitable and reduce the overall size of the air conditioner indoor unit 1000. size.

In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, rather than indicating or implying the pointed device or element It must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the application. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, unless otherwise specified, "plurality" means two or more.

In the description of this application, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood under specific circumstances.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" etc. mean to incorporate the implementation The specific features, structures, materials or characteristics described by the examples or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and modifications can be made to these embodiments without departing from the principle and purpose of the present application. The scope of the application is defined by the claims and their equivalents.

Claims (20)

1. A heat exchanger assembly, which includes:

   The main heat exchanger, the main heat exchanger includes a front heat exchanger and a rear heat exchanger, the front heat exchanger includes an upper heat exchange part and a lower heat exchange part, the upper end of the upper heat exchange part and the The upper end of the rear heat exchanger is connected, 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 includes a first heat exchange tube, and the rear heat exchanger includes a second Heat exchange tube

   An auxiliary heat exchanger, the auxiliary heat exchanger is arranged on the windward side of the main heat exchanger, and the auxiliary heat exchanger has a third heat exchange tube;

   When the heat exchanger assembly is cooled, the refrigerant flows from the third heat exchange tube of the auxiliary heat exchanger to the first heat exchange tube and the second heat exchange tube of the main heat exchanger.
2. The heat exchanger assembly according to claim 1, wherein the inner diameter of the first heat exchange tube is smaller than the inner diameter of the second heat exchange tube, and the inner diameter of the second heat exchange tube is smaller than the third heat exchange tube. The inner diameter of the tube,

   The heat exchange 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 third flow path of the auxiliary heat exchanger. A heat pipe, the second flow path flows through the second heat exchange tube of the rear heat exchanger, and the fourth flow path flows through the first heat exchange tube of the front heat exchanger,

   When the heat exchanger assembly is cooled, the 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 according to claim 2, wherein the inner diameter of the third heat exchange tube is 7 mm, the inner diameter of the second heat exchange tube is 6 mm, and the inner diameter of the first heat exchange tube is 5 mm.
4. The heat exchanger assembly according to claim 2, wherein the auxiliary heat exchanger comprises a first auxiliary heat exchanger and a second auxiliary heat exchanger, and the first auxiliary heat exchanger is located in the rear heat exchanger The second auxiliary heat exchanger is located on the windward side of the lower heat exchange part,

   The first flow path includes a first sub flow path and a second sub flow path, the first sub flow path flows through the third heat exchange tube of the first auxiliary heat exchanger, and the second sub flow path Through the third heat exchange tube of the second auxiliary heat exchanger,

   When the heat exchanger assembly is cooled, the refrigerant flows through the first sub-flow path and the second sub-flow path in sequence.
5. The heat exchanger assembly of claim 4, wherein the second flow path includes a first main path and a first branch, a second branch, and a third branch branched from the first main path. The first main circuit, the first branch circuit, the second branch circuit and the third branch circuit constitute all the second heat exchange tubes of the rear heat exchanger,

   When the heat exchanger assembly is cooled, the refrigerant flows through the first main circuit and simultaneously splits into the first branch, the second branch and the third branch.
6. The heat exchanger assembly according to claim 5, wherein the second heat exchange tube of the rear heat exchanger comprises an upwind row of heat exchange tubes, and the first main path flows through the upwind row of heat exchange tubes , The first branch, the second branch and the third branch constitute the remaining second heat exchange tubes on the rear heat exchanger.
7. The heat exchanger assembly according to claim 6, wherein the rear heat exchanger further comprises a middle row of heat exchange tubes and a leeward row of heat exchange tubes, the upwind row of heat exchange tubes, the middle row of heat exchange tubes, and The leeward rows of heat exchange tubes are arranged in sequence along the flow direction of the airflow, and the first branch, the second branch, and the third branch are all from the second branch of the middle row of heat exchange tubes. The heat exchange tube flows to the second heat exchange tube in the leeward row of heat exchange tubes.
8. The heat exchanger assembly of claim 5, wherein the number of the second heat exchange tubes in the first branch, the second branch, and the third branch is the same.
9. The heat exchanger assembly according to claim 5, wherein the first main circuit and the first branch circuit, the second branch circuit, and the third branch circuit are connected by a first distributor.
10. The heat exchanger assembly of claim 2, wherein the fourth flow path includes: a fifth branch, a sixth branch, a seventh branch, an eighth branch, a ninth branch, and a tenth branch The fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch, and the tenth branch form the front heat exchanger Of all the first heat exchange tubes,

    The fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch, and the tenth branch are all from the front heat exchanger The first heat exchange tube on the windward side flows to the first heat exchange tube on the leeward side of the front heat exchanger.
11. The heat exchanger assembly of claim 10, wherein the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch, and the The number of the first heat exchange tubes in the tenth branch is the same.
12. The heat exchanger assembly according to claim 10, wherein the third flow path is connected to the fifth branch, the sixth branch, the seventh branch, the eighth branch, and the The ninth branch and the tenth branch are connected by a second distributor.
13. The heat exchanger assembly according to any one of claims 1-12, wherein the front heat exchanger has at least three rows of the first heat exchange tubes in the air flow direction,

    And/or, the rear heat exchanger has at least three rows of the second heat exchange tubes in the air flow direction.
14. The heat exchanger assembly according to any one of claims 1-13, wherein the number of heat exchange tubes of the main heat exchanger is 30 or more.
15. An air conditioner indoor unit, which includes:

    A housing, the housing having an air inlet and an air outlet;

    A wind wheel, the wind wheel is arranged in the housing to drive the air flow from the air inlet to the air outlet;

    The heat exchanger assembly according to any one of claims 1-14, the heat exchanger assembly is arranged in the shell and located on the inlet side of the wind wheel, the front heat exchanger and the The connecting part of the rear heat exchanger is the part of the main heat exchanger closest to the air inlet.
16. The air conditioner indoor unit according to claim 15, wherein the air inlet is provided on the upper side of the housing, and the rear heat exchanger and the upper heat exchange part are formed in a side view so as to cover from above. The roughly inverted V shape of the wind wheel.
17. The air conditioner indoor unit of claim 16, wherein the lower heat exchange part, the upper heat exchange part, and the rear heat exchanger at least partially surround the wind wheel, and the lower heat exchange part Is arranged at the front and bottom of the wind wheel, the upper heat exchange part is arranged at the front and upper part of the wind wheel, between the lower heat exchange part and the air inlet, and the upper end of the upper heat exchange part faces The rear is inclined, the lower end is connected with the upper end of the lower heat exchange part, the rear heat exchanger is arranged above the rear of the wind wheel, the upper end is inclined toward the front, and is connected with the upper end of the upper heat exchange part.
18. The air conditioner indoor unit according to claim 15, wherein the angle between the rear heat exchanger and the vertical direction is 48° or less.
19. The air conditioner indoor unit according to claim 15, wherein the distance between the main heat exchanger and the wind wheel is 10 mm or more.
20. The air conditioner indoor unit according to claim 15, wherein the width dimension of the casing in the front-rear direction is 800 mm or less, and the height dimension of the casing in the vertical direction is 300 mm or less.

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