Coil heat exchange assembly, coil heat exchanger and heating and ventilation equipment

Abstract

The utility model relates to the technical field related to heating and ventilation, and discloses a coil heat exchange assembly, a coil heat exchanger and heating and ventilation equipment, the coil heat exchange assembly is provided with a first area and a second area which are arranged in the second direction, and in the second direction, the flow speed of airflow formed in the first area by an airflow driving assembly is higher than that of airflow in the second area; the second direction intersects with the first direction; at least one first heat exchange tube is arranged in the first area, and at least one second heat exchange tube is arranged in the second area; the first heat exchange tube and the second heat exchange tubes are connected in parallel between a water flow inlet of the coil heat exchange assembly and a water flow outlet of the coil heat exchange assembly, and the tube pass from an inlet to an outlet of the first heat exchange tube is smaller than the tube pass from an inlet to an outlet of any second heat exchange tube; the total heat exchange amount of the coil pipe heat exchange assembly is increased, and the heat exchange efficiency of the coil pipe heat exchange assembly is improved.

Description

Technical Field

[0001] The present application relates to the technical field related to HVAC, and in particular to a coil heat exchange component, a coil heat exchanger and HVAC equipment. Background Art

[0002] This section merely provides background information related to the present application and is not necessarily prior art.

[0003] Heat exchangers are usually used in HVAC equipment to adjust the indoor temperature. Coil heat exchangers are one of the most common coil heat exchangers in HVAC equipment. A water flow channel can be set inside the coil heat exchanger. The water flows through the water flow channel to exchange heat with the external air flow, thereby achieving the purpose of adjusting the indoor temperature. At present, in some technologies, a fan is installed on one side of the coil heat exchanger to promote the external air flow through the coil heat exchanger. Although the fan can improve the heat exchange efficiency of the coil heat exchanger, the heat exchange efficiency of the coil heat exchanger is still relatively limited. Utility Model Content

[0004] The purpose of the present application is to at least improve the heat exchange efficiency of the coil heat exchanger. This purpose is achieved through the following technical solutions:

[0005] The first aspect of the present application proposes a coil heat exchange assembly, which is applied to a coil heat exchanger with an airflow driving assembly, wherein the airflow driving assembly is used to drive the airflow to flow through the coil heat exchange assembly along a first direction, and the coil heat exchange assembly has a first zone and a second zone arranged along a second direction, along the second direction, the airflow velocity formed by the airflow driving assembly in the first zone is higher than the airflow velocity in the second zone, and the second direction intersects with the first direction; at least one first heat exchange tube is arranged in the first zone, and at least one second heat exchange tube is arranged in the second zone; the first heat exchange tube and the second heat exchange tube are connected in parallel between the water flow inlet and the water flow outlet of the coil heat exchange assembly, and the pipe path from the inlet to the outlet of each of the first heat exchange tubes is smaller than the pipe path from the inlet to the outlet of any of the second heat exchange tubes.

[0006] According to the coil heat exchange assembly of the present application, the tube path of the first heat exchange tube in the first zone of the coil heat exchanger with a higher airflow velocity is set shorter, and the corresponding water flow velocity in the first heat exchange tube is higher. Since the heat exchange efficiency of the heat exchange tube is proportional to the flow velocity inside and outside the tube, the airflow velocity outside the tube in this zone is higher, so the heat exchange per unit area in this zone is increased more proportionally; similarly, the tube path of the first heat exchange tube in the second zone of the coil heat exchanger with a lower airflow velocity is set longer, and the corresponding water flow velocity in the second heat exchange tube is lower. Since the airflow velocity outside the tube in this zone is also lower, the heat exchange per unit area in this zone is reduced less proportionally, so that the overall heat exchange of the coil heat exchange assembly is increased, and the heat exchange efficiency of the coil heat exchange assembly is improved.

[0007] In addition, the coil heat exchange assembly according to the present application may also have the following additional technical features:

[0008] In some embodiments of the present application, each of the first heat exchange tubes includes a U-shaped tube or multiple U-shaped tubes connected in series, each of the second heat exchange tubes includes multiple U-shaped tubes connected in series, and the number of the U-shaped tubes of the second heat exchange tubes is greater than the number of the U-shaped tubes of the first heat exchange tubes, and each of the U-shaped tubes extends along a third direction, and the third direction, the second direction and the first direction intersect each other.

[0009] In some embodiments of the present application, the coil heat exchange assembly also includes at least one third heat exchange tube, and the third heat exchange tube, the first heat exchange tube and the second heat exchange tube are connected in parallel between the water inlet and the water outlet, and the third heat exchange tube includes a connected water inlet section and a water outlet section, the water inlet section is connected to the water inlet, and the water outlet section is connected to the water outlet, the water inlet section is arranged in the first zone, and the water outlet section is arranged in the second zone.

[0010] In some embodiments of the present application, the area of ​​the maximum flow cross-section of the water inlet section is less than or equal to the area of ​​the minimum flow cross-section of the water outlet section.

[0011] In some embodiments of the present application, the water inlet section includes a U-shaped tube or multiple U-shaped tubes connected in series, the water outlet section includes multiple U-shaped tubes connected in parallel, the inlets of the multiple U-shaped tubes connected in parallel in the water outlet section are connected to the outlet of the water inlet section, each of the U-shaped tubes extends along a third direction, and the third direction, the second direction and the first direction intersect each other.

[0012] In some embodiments of the present application, two second zones are provided, and along the second direction, the first zone is provided in the middle of the coil heat exchange assembly, and along the second direction, the two second zones are provided on opposite sides of the first zone respectively.

[0013] In some embodiments of the present application, the coil heat exchange assembly also includes a water distribution and collection component, which has the water inlet, the water outlet, multiple water inlet diversion ports and multiple water outlet diversion ports, the inlet of the first heat exchange tube, the inlet of the second heat exchange tube and the inlet of the third heat exchange tube are respectively connected to the water inlet through at least one of the water inlet diversion ports, the outlet of the first heat exchange tube, the outlet of the second heat exchange tube and the outlet of the third heat exchange tube are respectively connected to the water outlet through at least one of the water outlet diversion ports, and the number of the water outlet diversion ports is greater than the number of the water inlet diversion ports.

[0014] In some embodiments of the present application, the water inlet shunt port is connected to a water inlet branch pipe, and the water outlet shunt port is connected to a water outlet branch pipe. The inlet of the first heat exchange tube, the inlet of the second heat exchange tube, and the inlet of the third heat exchange tube are respectively connected to the corresponding water inlet shunt port through the water inlet branch pipe, and the outlet of the first heat exchange tube, the outlet of the second heat exchange tube, and the outlet of the third heat exchange tube are respectively connected to the corresponding water outlet shunt port through the water outlet branch pipe.

[0015] The second aspect of the present application proposes a coil heat exchange assembly, which is applied to a coil heat exchanger with an airflow driving assembly, wherein the airflow driving assembly is used to drive the airflow to flow through the coil heat exchange assembly along a first direction, and the coil heat exchange assembly has a first zone and a second zone arranged along a second direction, along the second direction, the airflow velocity formed by the airflow driving assembly in the first zone is higher than the airflow velocity in the second zone, and the second direction intersects with the first direction; the coil heat exchange assembly includes at least one third heat exchange tube, and the third heat exchange tube includes a connected water inlet section and a water outlet section, the water inlet section is connected to the water inlet of the coil heat exchange assembly, and the water outlet section is connected to the water outlet of the coil heat exchange assembly, the water inlet section is arranged in the first zone, and the water outlet section is arranged in the second zone.

[0016] According to the coil heat exchange assembly of the present application, since there will be energy loss when the water flows in the third heat exchange tube, the flow rate of the water flow in the inlet section will be higher than the flow rate of the water flow in the outlet section. In this embodiment, the inlet section of the third heat exchange tube is set in the first zone with a higher airflow velocity, and the outlet section of the third heat exchange tube is set in the second zone with a lower airflow velocity. Since the heat exchange efficiency of the heat exchange tube is proportional to the flow velocity inside and outside the tube, and the temperature difference between the inside and outside of the tube at the inlet section is large, and the airflow velocity outside the tube at the inlet section in the first zone is high, the heat exchange per unit area in this area is increased by a larger proportion; similarly, the airflow velocity outside the tube at the outlet section of the second zone is relatively low, and the temperature difference inside and outside the tube at the outlet section is relatively low, so the heat exchange per unit area in this area is reduced by a smaller proportion, so that the overall heat exchange of the coil heat exchange assembly is increased, and the heat exchange efficiency of the coil heat exchange assembly is improved.

[0017] In addition, the coil heat exchange assembly according to the present application may also have the following additional technical features:

[0018] In some embodiments of the present application, the water inlet section includes a U-shaped tube or multiple U-shaped tubes connected in series, the water outlet section includes multiple U-shaped tubes connected in parallel, the inlets of the multiple U-shaped tubes connected in parallel in the water outlet section are connected to the outlet of the water inlet section, each of the U-shaped tubes extends along a third direction, and the third direction, the second direction and the first direction intersect each other.

[0019] The third aspect of the present application proposes a coil heat exchanger, comprising an airflow driving component and a coil heat exchange component proposed in the present application or any embodiment of the present application, wherein the airflow driving component is arranged on one side of the coil heat exchange component along the first direction.

[0020] In addition, the coil heat exchanger according to the present application may also have the following additional technical features:

[0021] In some embodiments of the present application, along the first direction, the inlet of the first heat exchange tube is located on a side of the outlet of the first heat exchange tube away from the airflow driving assembly;

[0022] And / or, along the first direction, the inlet of the second heat exchange tube is located on a side of the outlet of the second heat exchange tube away from the airflow driving component.

[0023] A fourth aspect of the present application proposes a HVAC device, including the coil heat exchanger proposed in the present application or any embodiment of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the structure of a coil heat exchanger in some embodiments of the present application;

[0026] Figure 2 This is a schematic diagram of the structure of a coil heat exchange assembly in some embodiments of the present application;

[0027] Figure 3 A schematic diagram showing the correlation between the coil heat exchange assembly and the air flow velocity in some embodiments of the present application;

[0028] Figure 4 A schematic diagram of a first heat exchange tube according to some embodiments of the present application;

[0029] Figure 5 A schematic diagram of a second heat exchange tube according to some embodiments of the present application;

[0030] Figure 6 A schematic diagram showing the correlation between the coil heat exchange assembly and the air flow velocity in some embodiments of the present application;

[0031] Figure 7 A schematic diagram of a third heat exchange tube according to some embodiments of the present application;

[0032] Figure 8This is a simplified diagram showing the correlation between the coil heat exchange assembly and the air flow rate according to some embodiments of the present application.

[0033] The reference numerals are as follows:

[0034] 100. Coil heat exchange assembly;

[0035] 10. U-shaped tube; 11. first U-shaped tube; 12. second U-shaped tube; 13. third U-shaped tube; 14. fourth U-shaped tube; 15. fifth U-shaped tube; 16. sixth U-shaped tube; 17. seventh U-shaped tube; 18. eighth U-shaped tube; 20. connector; 30. tee; 40. cross-tube connector;

[0036] 101, first zone; 102, second zone; 110, first heat exchange tube; 120, second heat exchange tube; 130, third heat exchange tube; 131, water inlet section; 132, water outlet section; 140, water distribution and collection member; 141, water inlet cavity; 142, water outlet cavity; 143, water flow inlet; 144, water flow outlet; 145, water inlet branch pipe; 146, water outlet branch pipe; 150, fin; 160, shell; 161, end plate; 162, air flow outlet;

[0037] 200, air flow drive assembly;

[0038] X, first direction; Y, second direction; Z, third direction; A, water flow direction; B, flow velocity curve; V, air flow velocity. DETAILED DESCRIPTION

[0039] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0040] It should be understood that the terms used in the text are only for the purpose of describing specific example embodiments, and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used in the text may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0041] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0042] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0043] The coil heat exchanger is one of the common heat exchangers in HVAC equipment. A water flow channel can be set inside the coil heat exchanger. The water flows through the water flow channel to exchange heat with the external air flow, so as to achieve the purpose of regulating the indoor temperature. In some technologies, a fan is installed on one side of the coil heat exchanger to promote the external air flow through the coil heat exchanger. After analyzing the fan duct of the coil heat exchanger, it is found that because the fan air outlet is located in the middle or upper middle part of the unit, the outlet air flow velocity is high in the middle and low on both sides, or high on one side and low on the other side in the direction perpendicular to the air flow direction. At present, the water distribution scheme of the coil heat exchanger is that the number of inlets and outlets is the same, and each flow path is relatively uniform, the water flow velocity at each position is the same or similar, and there is no obvious difference in the distribution of external air flow velocity, resulting in the heat exchange efficiency of the coil heat exchanger cannot be fully reflected.

[0044] In response to the above problems, Figures 1 to 7As shown, the present application proposes a coil heat exchange assembly 100, which is applied to a coil heat exchanger having an airflow driving assembly 200. The airflow driving assembly 200 is used to drive the airflow to flow through the coil heat exchange assembly 100 along a first direction X. The coil heat exchange assembly 100 has a first zone 101 and a second zone 102 arranged along a second direction Y. Along the second direction Y, the airflow velocity V formed by the airflow driving assembly 200 in the first zone 101 is higher than the airflow velocity V in the second zone 102. The second direction Y intersects with the first direction X. At least one first heat exchange tube 110 is arranged in the first zone 101 of the coil heat exchange assembly 100, and at least one second heat exchange tube 120 is arranged in the second zone 102; the first heat exchange tube 110 and the second heat exchange tube 120 are connected in parallel between the water flow inlet 143 of the coil heat exchange assembly 100 and the water flow outlet 144 of the coil heat exchange assembly 100, and the pipe path from the inlet to the outlet of the first heat exchange tube 110 is smaller than the pipe path from the inlet to the outlet of each second heat exchange tube 120.

[0045] The airflow drive component 200 may be a fan, and the pipe path is the process flow, that is, the length of the path of the water flow. The water inlet 143 in the coil heat exchange component 100 may be understood as the total flow inlet of the coil heat exchange component 100, and the water inlet 143 in the coil heat exchange component 100 may be understood as the total flow inlet of the coil heat exchange component 100.

[0046] The first heat exchange tube 110 may be one or more, the inlet of each first heat exchange tube 110 is connected to the water inlet 143 in the coil heat exchange assembly 100, and the outlet of each first heat exchange tube 110 is connected to the water outlet 144 of the coil heat exchange assembly 100, that is, each first heat exchange tube 110 constitutes a complete pipeline from the water inlet to the water outlet of the coil heat exchange assembly 100, and each first heat exchange tube 110 is independent of each other and can be connected in parallel between the water inlet 143 and the water outlet 144.

[0047] The second heat exchange tube 120 may be one or more, and the inlet of each second heat exchange tube 120 is connected to the water inlet 143 in the coil heat exchange assembly 100, and the outlet of each second heat exchange tube 120 is connected to the water outlet 144 of the coil heat exchange assembly 100, that is, each second heat exchange tube 120 constitutes a complete pipeline from water inlet to water outlet of the coil heat exchange assembly 100, and each second heat exchange tube 120 is independent of each other and can be connected in parallel between the water inlet 143 and the water outlet 144. Each first heat exchange tube 110 and each second heat exchange tube 120 are also independent of each other, and each first heat exchange tube 110 and each second heat exchange tube 120 are connected in parallel between the water inlet 143 and the water outlet 144.

[0048] The tube length of the first heat exchange tube 110 is smaller than that of the second heat exchange tube 120. It can be understood that the path taken by the water from the water inlet 143 flowing through the first heat exchange tube 110 and returning to the water outlet 144 is shorter than the path taken by the water from the water inlet 143 flowing through the second heat exchange tube 120 and returning to the water outlet 144.

[0049] The airflow is usually an airflow. The first direction X can be understood as the flow direction of the airflow. The second direction Y can be substantially perpendicular to the first direction X. In some embodiments, the airflow flow component forms an airflow flowing in a horizontal direction, and the second direction Y can be substantially a vertical direction.

[0050] The first zone 101 and the second zone 102 are divided according to the airflow velocity V formed by the airflow driving assembly 200. Figure 3 As shown, the velocity curve B of the airflow velocity V formed by the airflow driving component 200 in the second direction Y is roughly parabolic. Wherein, in the case of only one airflow driving component 200, the position directly facing the airflow outlet 162 of the airflow driving component 200 is usually the position with the highest airflow velocity V. In the case of two airflow driving components 200, the overlapping position between the two airflow driving components 200 may form the position with the highest airflow velocity. The partial area from the highest point of the airflow velocity V to both sides can be divided into the first area 101, and the second area 102 is far away from the highest point of the airflow velocity V relative to the first area 101.

[0051] Along the second direction Y, the coil heat exchange assembly 100 can be divided into two zones, namely, a first zone 101 and a second zone 102; along the second direction Y, the coil heat exchange assembly 100 can also be divided into three zones, for example, Figure 3 and Figure 6 As shown, a second zone 102 is divided on opposite sides of the first zone 101. Along the second direction Y, the coil heat exchange assembly 100 can also be divided into more zones, at least two of which meet the arrangement requirements of the corresponding heat exchange tubes of the first zone 101 and the second zone 102.

[0052] It should be noted that Figure 3 and Figure 6 In the figure, the left side shows the coil heat exchange assembly 100, and the right side shows the relationship between the flow rate of the airflow and the second direction Y, wherein the vertical coordinate in the right side figure is the corresponding position of the second direction Y, and the horizontal coordinate in the right side figure represents the airflow velocity V.

[0053] According to the coil heat exchange assembly 100 of the present embodiment, the tube path of the first heat exchange tube 110 in the first zone 101 with a higher airflow velocity V is set shorter, and the flow resistance is smaller. Correspondingly, the water flow velocity in the corresponding first heat exchange tube 110 is higher. Since the heat exchange efficiency of the heat exchange tube is proportional to the flow velocity inside and outside the tube, the airflow velocity V outside the tube in this area is higher, so the heat exchange per unit area in this area is increased more proportionally; similarly, the tube path of the first heat exchange tube 110 in the second zone 102 with a lower airflow velocity V of the coil heat exchanger is set longer, and the flow resistance is larger. Correspondingly, the water flow velocity in the corresponding second heat exchange tube 120 is lower. Since the airflow velocity V outside the tube in this area is also lower, the heat exchange per unit area in this area is reduced less proportionally, so that the overall heat exchange of the coil heat exchange assembly 100 is increased, and the heat exchange efficiency of the coil heat exchange assembly 100 is improved.

[0054] The coil heat exchange assembly 100 of this embodiment may also include a shell 160, and the heat exchange tubes of the coil heat exchange assembly 100, including the first heat exchange tube 110, the second heat exchange tube 120 and the third heat exchange tube 130, are all arranged on the shell 160. Specifically, a housing space is arranged in the shell 160, and the main parts of the first heat exchange tube 110, the second heat exchange tube 120 and the third heat exchange tube 130 are arranged in the housing space. The shell 160 may be provided with end plates 161 at both ends along the third direction Z, and the ends of the first heat exchange tube 110, the second heat exchange tube 120 and the third heat exchange tube 130 may be fixed on the end plates 161 at the corresponding ends. Specifically, the ends of the first heat exchange tube 110, the second heat exchange tube 120 and the third heat exchange tube 130 may each pass through the end plate 161 of the shell, and may be expanded or welded to the end plate 161. The end plate 161 may be used to connect with other structural parts of the whole machine to play a role in structural fixing. The end plate 161 of the housing and the housing may be an integral structure, or may be a separate assembly structure.

[0055] The shell 160 can be a roughly rectangular structure, and one of the two side surfaces of the shell 160 opposite to each other along the first direction X (defined as the first side surface for the convenience of description) is provided with an air flow inlet, and the side of the shell 160 opposite to the air flow inlet (defined as the second side surface for the convenience of description) is provided with an air flow outlet 162, and the air flow drive assembly 200 can be fixedly connected to the shell 160 and arranged on the side where the first side surface is located.

[0056] It should be noted that the first side surface can be partially hollowed out to form an airflow inlet, or the first side surface can be completely hollowed out, that is, the shell 160 does not have a side wall on the first side surface, so as to form an airflow inlet; the second side surface can be partially hollowed out to form an airflow outlet 162, or the second side surface can be completely hollowed out, that is, the shell 160 does not have a side wall on the second side surface, so as to form an airflow outlet 162. Figure 1In the figure, the second side is completely hollowed out to form the airflow outlet 162. To simplify the drawings, Figure 1 The actual structure of the coil heat exchanger is only shown at a partial position of the second side surface, and the entire internal structure of the coil heat exchanger is not shown.

[0057] In some embodiments, optionally, each first heat exchange tube 110 includes a U-shaped tube 10 or multiple U-shaped tubes 10 connected in series, each second heat exchange tube 120 includes multiple U-shaped tubes 10 connected in series, and the number of U-shaped tubes 10 in the second heat exchange tube 120 is greater than the number of U-shaped tubes 10 in the first heat exchange tube 110, and each U-shaped tube 10 extends along a third direction Z, and the third direction Z, the second direction Y and the first direction X intersect each other.

[0058] The third direction Z, the second direction Y and the first direction X may be arranged substantially perpendicularly to each other. In some embodiments, the first direction X may be understood as the width direction of the shell 160 , the second direction Y may be understood as the height direction of the shell 160 , and the third direction Z may be understood as the length direction of the shell 160 .

[0059] The U-shaped tube 10 is a roughly U-shaped tube, which includes two roughly parallel main tube parts and an elbow connecting and communicating the two main tube parts. A plurality of U-shaped tubes 10 connected in series can be understood as a plurality of U-shaped tubes 10 connected in sequence.

[0060] In this embodiment, the U-shaped tube 10 forming the first heat exchange tube 110 and the U-shaped tube 10 forming the second heat exchange tube 120 can be tubes of the same specification, and their structure and size matrix are the same. All U-shaped tubes 10 of the coil heat exchange assembly 100 can be roughly evenly distributed, so that the number of U-shaped tubes 10 within a unit volume is roughly the same.

[0061] The first heat exchange tube 110 may include one U-shaped tube 10, in which case the second heat exchange tube 120 may include two or more U-shaped tubes 10 connected in sequence and in communication. The first heat exchange tube 110 may also include two or more U-shaped tubes 10 connected in sequence and in communication, in which case the second heat exchange tube 120 may include three or more U-shaped tubes 10 connected in sequence and in communication. The number of U-shaped tubes 10 in the second heat exchange tube 120 is at least one more than the number of U-shaped tubes 10 in the first heat exchange tube 110.

[0062] In a specific embodiment, Figure 3 As shown, three first heat exchange tubes 110 may be provided in the first zone 101. Figure 3 and Figure 4 As shown, each first heat exchange tube 110 includes two U-shaped tubes 10 connected and communicated in sequence, wherein the two U-shaped tubes 10 can be connected by a connector 20, and the connector 20 can be a semicircular tube; Figure 3 As shown, a second heat exchange tube 120 is disposed in the upper second zone 102. Figure 3 and Figure 5 As shown, the second heat exchange tube 120 includes three U-shaped tubes 10 connected in sequence. Along the flow direction of the water flow, two adjacent U-shaped tubes 10 can be connected by a connector 20, and the connector 20 can be a semicircular tube; Figure 3 As shown, a second heat exchange tube 120 is disposed in the lower second zone 102 , and the second heat exchange tube 120 includes 6 U-shaped tubes 10 connected and communicated in sequence.

[0063] It is understandable that the number of U-shaped tubes 10 connected in series in the second heat exchange tube 120 is larger, while the number of U-shaped tubes 10 in the first heat exchange tube 110 is smaller, which can more conveniently achieve the design requirements of the tube paths of the first heat exchange tube 110 and the second heat exchange tube 120.

[0064] Combination Figure 6 and Figure 7 As shown, optionally, the coil heat exchange assembly 100 includes at least one third heat exchange tube 130, and the third heat exchange tube 130, the first heat exchange tube 110 and the second heat exchange tube 120 are connected in parallel between the water inlet 143 and the water outlet 144, and the third heat exchange tube 130 includes a connected water inlet section 131 and a water outlet section 132, the water inlet section 131 is connected to the water inlet 143, and the water outlet section 132 is connected to the water outlet 144, the water inlet section 131 is arranged in the first zone 101, and the water outlet section 132 is arranged in the second zone 102.

[0065] The third heat exchange tube 130 may be one or more, the inlet of each third heat exchange tube 130 is connected to the water inlet 143 in the coil heat exchange assembly 100, and the outlet of each third heat exchange tube 130 is connected to the water outlet 144 of the coil heat exchange assembly 100, that is, each third heat exchange tube 130 constitutes a complete pipeline from water inlet to water outlet of the coil heat exchange assembly 100, and each third heat exchange tube 130 is independent of each other and can be connected in parallel between the water inlet 143 and the water outlet 144. Each first heat exchange tube 110, each second heat exchange tube 120 and each third heat exchange tube 130 are also independent of each other, and each first heat exchange tube 110, each second heat exchange tube 120 and each second heat exchange tube 120 are connected in parallel between the water inlet 143 and the water outlet 144.

[0066] It is understandable that, since there will be energy loss when the water flows in the third heat exchange tube 130, the flow rate of the water flow in the inlet section will be higher than the flow rate of the water flow in the outlet section. In this embodiment, the inlet section of the third heat exchange tube 130 is set in the first zone 101 where the airflow velocity V is higher, and the outlet section of the third heat exchange tube 130 is set in the second zone 102 where the airflow velocity V is lower. Since the heat exchange efficiency of the heat exchange tube is proportional to the flow velocity inside and outside the tube, and the temperature difference between the inside and outside of the tube at the inlet section is larger, and the airflow velocity V outside the tube of the inlet section in the first zone 101 is higher, the heat exchange per unit area in this area is increased more; similarly, the airflow velocity V outside the tube of the outlet section of the second zone 102 is relatively lower, and the temperature difference between the inside and outside of the tube at the outlet section is relatively lower, so the heat exchange per unit area in this area is reduced less, so that the overall heat exchange of the coil heat exchange assembly 100 is increased, and the heat exchange efficiency of the coil heat exchange assembly 100 is improved.

[0067] Optionally, the area of ​​the maximum flow cross section of the water inlet section 131 is less than or equal to the area of ​​the minimum flow cross section of the water outlet section 132 .

[0068] The flow cross section is a cross section perpendicular to the water flow direction A. When the water inlet section 131 is cut along a plane perpendicular to the water flow direction A inside the water inlet section 131, the area of ​​the overlapping area between the plane and the water inlet section 131 can be used as the flow cross section area of ​​the water inlet section 131. When the water outlet section 132 is cut along a plane perpendicular to the water flow direction A inside the water outlet section 132, the area of ​​the overlapping area between the plane and the water outlet section 132 can be used as the flow cross section area of ​​the water outlet section 132.

[0069] It should be understood that the water inlet section 131 may be of equal diameter along the water flow direction A, and the water outlet section 132 may also be of equal diameter along the water flow direction A. When one of the water inlet section 131 and the water outlet section 132 is set to be of non-equal diameter, that is, along the water flow direction A, the flow cross-section area of ​​the water inlet section 131 at non-passing positions is different, or the flow cross-section area at different positions of the water outlet section 132 is different, the flow cross-section area of ​​the water inlet section 131 takes the maximum area, and the flow cross-section area of ​​the water outlet section 132 takes the minimum value, that is, the minimum value of the flow cross-section area of ​​the water outlet section 132 needs to be greater than or equal to the maximum value of the flow cross-section area of ​​the water inlet section 131, so that the water flow velocity of the water outlet section 132 is less than the water flow velocity of the water outlet section 132.

[0070] It can be understood that the flow cross section of the water inlet section 131 is small, while the flow cross section of the water outlet section 132 is large, so that in a third heat exchange tube 130, the water flow velocity in the water inlet section 131 is large, and the water flow velocity in the water outlet section 132 is small. Since the heat exchange efficiency of the heat exchange tube is proportional to the flow velocity inside and outside the tube, the water inlet section 131 is set in the first zone 101, and the air flow velocity V outside the tube of the water inlet section 131 is high, so the heat exchange per unit area in this area is increased more; similarly, the water outlet section 132 is set in the second zone 102, and the air flow velocity V outside the tube of the water outlet section 132 is also low, so the heat exchange per unit area in this area is reduced less, so that the overall heat exchange of the coil heat exchange assembly 100 is increased, and the heat exchange efficiency of the coil heat exchange assembly 100 is improved.

[0071] In some embodiments, optionally, the water inlet section 131 includes a U-shaped tube 10 or multiple U-shaped tubes 10 connected in series, and the water outlet section 132 includes multiple U-shaped tubes 10 connected in parallel, and the inlets of the multiple U-shaped tubes 10 connected in parallel in the water outlet section 132 are all connected to the outlet of the water inlet section 131, and each U-shaped tube 10 extends along a third direction Z, and the third direction Z, the second direction Y and the first direction X intersect each other.

[0072] The third heat exchange tube 130 can be formed by connecting a plurality of U-shaped tubes 10 in series or in parallel. The plurality of U-shaped tubes 10 connected in parallel in the water outlet section 132 can be directly connected to the outlet of the water inlet section 131, and the plurality of U-shaped tubes 10 connected in parallel in the water outlet section 132 can also be connected to the outlet of the water inlet section 131 through one U-shaped tube 10 or a plurality of U-shaped tubes 10 connected in series.

[0073] It can be understood that a plurality of U-shaped tubes 10 are arranged in parallel in the water outlet section 132, so that the third heat exchange tube 130 forms a water flow channel structure with a single inlet and multiple locations. The front half of the flow path of the third heat exchange tube 130 (i.e., the water inlet section 131) is a single-inlet flow path. When the flow rate is the same, the total cross-sectional area is small and the flow velocity in the tube is high. This area is located at a position where the air flow velocity V outside the tube is relatively high. Since the heat exchange efficiency is proportional to the flow velocity inside and outside the tube, the heat exchange rate per unit area in this area is increased more. Similarly, the second half of the flow path (the position where the plurality of U-shaped tubes 10 in the water outlet section 132 are connected in parallel) is a multi-inlet flow path. When the flow rate is the same, the total cross-sectional area is large and the flow velocity in the tube is low. The heat exchange rate per unit area in this area is reduced less, and the overall heat exchange rate of the coil heat exchanger is increased.

[0074] like Figure 3 and Figure 6 As shown, in some embodiments, two second zones 102 are provided, and along the second direction Y, the first zone 101 is provided in the middle of the coil heat exchange assembly 100 , and along the second direction Y, the two second zones 102 are provided on both sides of the first zone 101 , respectively.

[0075] The heat exchange tubes in the upper second zone 102 and the heat exchange tubes in the lower second zone 102 may be arranged in the same manner or in different manners.

[0076] Reference Figure 6 and Figure 7 As shown, exemplarily, the coil heat exchange assembly 100 includes two third heat exchange tubes 130, the water inlet section 131 of each third heat exchange tube 130 includes a U-shaped tube 10, and the water outlet section 132 of each third heat exchange tube 130 includes three U-shaped tubes 10, wherein one of the three U-shaped tubes 10 of the water outlet section 132 is connected in series with the outlet of the water inlet section 131, and the outlet of the U-shaped tube 10 is connected in parallel with the other two U-shaped tubes 10. The U-shaped tube 10 at the most upstream of the water outlet section 132, that is, the U-shaped tube 10 connected in series with the water outlet section 132 and the water inlet section 131, can be connected and communicated with the U-shaped tube 10 of the water inlet section 131 through a cross-tube connecting piece 40; the outlet of the U-shaped tube 10 at the most upstream of the water outlet section 132 can be connected and communicated with the two U-shaped tubes 10 connected in parallel downstream through a tee 30.

[0077] Among them, Figure 6 In the embodiment, two first heat exchange tubes 110 are further arranged in the first zone 101 , only the second heat exchange tube 120 is arranged in the upper second zone 102 , and only the water outlet section 132 of the third heat exchange tube 130 is arranged in the lower second zone 102 .

[0078] In some embodiments, the coil heat exchange assembly 100 also includes a water distribution member 140, which has a water inlet 143, a water outlet 144, multiple water inlet diversion ports and multiple water outlet diversion ports. The inlet of the first heat exchange tube 110, the inlet of the second heat exchange tube 120 and the inlet of the third heat exchange tube 130 are respectively connected to the water inlet 143 through at least one water inlet diversion port, and the outlet of the first heat exchange tube 110, the outlet of the second heat exchange tube 120 and the outlet of the third heat exchange tube 130 are respectively connected to the water outlet 144 through at least one water outlet diversion port, and the number of water outlet diversion ports is greater than the number of water inlet diversion ports.

[0079] The water distribution member 140 is installed at an end of the housing 160 along the third direction Z and is located outside the housing 160 .

[0080] The inlet of the first heat exchange tube 110, the inlet of the second heat exchange tube 120, and the inlet of the third heat exchange tube 130 can be connected to the water inlet shunt port one by one. The inlet of each first heat exchange tube 110 can be provided with a corresponding water inlet shunt port, the inlet of each second heat exchange tube 120 can be provided with a corresponding water inlet shunt port, and the inlet of each third heat exchange tube 130 can be provided with a corresponding water inlet shunt port. The outlet of the first heat exchange tube 110, the outlet of the second heat exchange tube 120, and the outlet of the third heat exchange tube 130 can be connected to the water outlet shunt port one by one. The outlet of each first heat exchange tube 110 can be provided with a corresponding water outlet shunt port, the outlet of each second heat exchange tube 120 can be provided with a corresponding water outlet shunt port, and each third heat exchange tube 130 can have multiple outlets, and multiple water outlet shunt ports are provided accordingly. Among them, the outlet section of the third heat exchange tube 130 can form multiple outlets by connecting multiple U-shaped tubes 10 in parallel, so that the number of water outlet shunt ports can be greater than the number of water inlet shunt ports.

[0081] It can be understood that if there are fewer water inlets, the flow velocity in the pipeline will be high, and the water inlets are concentrated at the location where the air flow velocity V is higher; the water outlets 144 use parallel flow paths to increase the number of flow paths, and the flow velocity in the pipe is relatively low, which can balance the overall water pressure drop, and the water outlets 144 are dispersedly arranged in locations with lower wind speeds, which can increase the overall heat exchange of the coil heat exchange assembly 100 and improve the heat exchange efficiency.

[0082] In some embodiments, Figure 1 As shown, the water inlet shunt port is connected to a water inlet branch pipe 145, the water outlet shunt port is connected to a water outlet branch pipe 146, the inlet of the first heat exchange tube 110, the inlet of the second heat exchange tube 120 and the inlet of the third heat exchange tube 130 are respectively connected to the corresponding water inlet shunt port through the water inlet branch pipe 145, and the outlet of the first heat exchange tube 110, the outlet of the second heat exchange tube 120 and the outlet of the third heat exchange tube 130 are respectively connected to the corresponding water outlet shunt port through the water outlet branch pipe 146.

[0083] In some embodiments, optionally, the coil heat exchange assembly 100 also includes a water distribution member 140, which has a water inlet channel 141 and a water outlet channel 142 that are isolated from each other, a water inlet 143 is connected to the water inlet channel 141, a water outlet 144 is connected to the water outlet channel 142, an inlet of the first heat exchange tube 110 and an inlet of the second heat exchange tube 120 are both connected to the water inlet channel 141, and an outlet of the first heat exchange tube 110 and an outlet of the second heat exchange tube 120 are both connected to the water outlet channel 142.

[0084] The inlet of the third heat exchange tube 130 may also be connected to the water inlet cavity 141, and the outlet of the third heat exchange tube 130 may also be connected to the water outlet cavity 142. The manifold 140 may be integrally formed or assembled to form an independent water inlet cavity 141 and water outlet cavity 142.

[0085] The inlet of the first heat exchange tube 110, the inlet of the second heat exchange tube 120, and the inlet of the third heat exchange tube 130 can be directly connected to the water distribution member 140 and communicated with the water inlet channel 141; the outlet of the first heat exchange tube 110, the outlet of the second heat exchange tube 120, and the outlet of the third heat exchange tube 130 can be directly connected to the water distribution member 140 and communicated with the water outlet channel 142. The inlet of the first heat exchange tube 110, the inlet of the second heat exchange tube 120, and the inlet of the third heat exchange tube 130 can also be connected to the water distribution member 140 through the water inlet branch pipe 145 and communicated with the water inlet channel 141; the outlet of the first heat exchange tube 110, the outlet of the second heat exchange tube 120, and the outlet of the third heat exchange tube 130 can be connected to the water distribution member 140 through the water outlet branch pipe 146 and communicated with the water outlet channel 142.

[0086] In some embodiments, the coil heat exchange assembly 100 further includes fins 150, and the first heat exchange tube 110, the second heat exchange tube 120, and the third heat exchange tube 130 may all be provided with fins 150, that is, all U-shaped tubes 10 of the coil heat exchange assembly 100 may all be provided with fins 150. The fins 150 may be provided with connection holes, and the U-shaped tubes 10 are passed through the connection holes so that the fins 150 are sleeved on the U-shaped tubes 10. The fins 150 and the U-shaped tubes 10 may be fixedly connected by expansion or welding.

[0087] In some embodiments, in a direction perpendicular to the second direction Y and the third direction Z, the inlet of the first heat exchange tube 110 is located on the side of the outlet away from the airflow driving assembly 200, and the water flow direction A of the first heat exchange tube 110 is opposite to the airflow flow direction, that is, it flows in the opposite direction of the first direction X to improve the heat exchange efficiency of the coil heat exchanger.

[0088] In some embodiments, in a direction perpendicular to the second direction Y and the third direction Z, the inlet of the second heat exchange tube 120 is located on the side of the outlet away from the airflow driving assembly 200, and the water flow direction A of the second heat exchange tube 120 is opposite to the airflow flow direction, that is, it flows in the opposite direction of the first direction X to improve the heat exchange efficiency of the coil heat exchanger.

[0089] In some embodiments, in a direction perpendicular to the second direction Y and the third direction Z, the inlet of the third heat exchange tube 130 is located on the side of the outlet away from the airflow driving assembly 200, and the water flow direction A of the third heat exchange tube 130 is opposite to the airflow flow direction, that is, it flows in the opposite direction of the first direction X to improve the heat exchange efficiency of the coil heat exchanger.

[0090] It should be noted that if Figure 8 As shown, the coil heat exchange assembly 100 may not be provided with the first heat exchange tube 110 and the second heat exchange tube 120 , but only with the third heat exchange tube 130 .

[0091] Specifically, some embodiments of the present application provide a coil heat exchange assembly 100, which only includes at least one third heat exchange tube 130. The third heat exchange tube 130 includes a water inlet section 131 and a water outlet section 132 that are connected to each other. The water inlet section 131 is connected to a water inlet 143 of the coil heat exchange assembly 100, and the water outlet section 132 is connected to a water outlet 144 of the coil heat exchange assembly 100. The water inlet section 131 is arranged in the first zone 101, and the water outlet section 132 is arranged in the second zone 102.

[0092] Figure 8 As shown, in a specific embodiment, the coil heat exchange assembly 100 includes four third heat exchange tubes 130. Figure 8 As shown, the arrangement of the two third heat exchange tubes 130 is the same: the water inlet section 131 of each third heat exchange tube 130 includes a U-shaped tube located in the first zone 101 (for the convenience of description, the U-shaped tube is defined as the first U-shaped tube 11), and the water outlet section 132 of each third heat exchange tube 130 includes three U-shaped tubes, and the three U-shaped tubes are all located in the second zone 102 below. The inlet of one of the three U-shaped tubes (for the convenience of description, it is defined as the second U-shaped tube 12) is connected to the first The U-shaped tubes 11 are connected in series, and the other two U-shaped tubes (defined as the third U-shaped tube 13 and the fourth U-shaped tube 14 for ease of description) are connected in parallel to the outlet of the second U-shaped tube 12. The water flows from the water inlet 143 into the inlet of the first U-shaped tube 11, and then flows through the first U-shaped tube 11 and the second U-shaped tube 12 in sequence, and then is divided into the third U-shaped tube 13 and the fourth U-shaped tube 14, and then flows back to the water outlet 144 through the outlet of the third U-shaped tube 13 and the outlet of the fourth U-shaped tube 14. Figure 8As shown, the other two third heat exchange tubes 130 are arranged in the same manner: the water inlet section 131 of each third heat exchange tube 130 includes two U-shaped tubes connected in series located in the first zone 101 (for the convenience of description, the U-shaped tubes are defined as the fifth U-shaped tube 15 and the sixth U-shaped tube 16, and the outlet of the fifth U-shaped tube 15 is connected and communicated with the inlet of the sixth U-shaped tube 16), and the water outlet section 132 of each third heat exchange tube 130 includes two U-shaped tubes (for the convenience of description, the seventh U-shaped tube 17 and the eighth U-shaped tube 18 are defined as the seventh U-shaped tube 19 and the eighth U-shaped tube 20). The seventh U-shaped tube 17 and the eighth U-shaped tube 18 are both located in the second zone 102 above. The seventh U-shaped tube 17 and the eighth U-shaped tube 18 are connected in parallel to the outlet of the sixth U-shaped tube 16. Water flows from the water inlet 143 into the inlet of the fifth U-shaped tube 15, and then flows through the fifth U-shaped tube 15 and the sixth U-shaped tube 16 in sequence, and then is divided into the seventh U-shaped tube 17 and the eighth U-shaped tube 18, and flows back to the water outlet 144 through the outlet of the seventh U-shaped tube 17 and the outlet of the eighth U-shaped tube 18.

[0093] It should be noted that the arrangement structures of the fifth U-shaped tube 15, the sixth U-shaped tube 16, the seventh U-shaped tube 17, and the eighth U-shaped tube 18 can also refer to Figure 7 The structure shown is roughly understood.

[0094] Among them, other specific settings of the third heat exchange tube 130 can be set with reference to the scheme of setting the first heat exchange tube 110 and the second heat exchange tube 120 at the same time in the coil heat exchange assembly 100, and will not be repeated here. It should be noted that, in the case where the coil heat exchange assembly 100 is only provided with the third heat exchange tube 130, the water inlet branch port of the manifold 140 can be provided with one, that is, the manifold 140 has a water inlet 143, a water outlet 144, at least one water inlet branch port and multiple water outlet branch ports, wherein the water inlet section 131 is connected to the water inlet 143 through the water inlet branch port, and the water outlet section 132 is connected to the water outlet 144 through the water outlet branch port, and the number of water outlet branch ports can be more than the number of water inlet branch ports.

[0095] According to the coil heat exchange assembly 100 of this embodiment, since there will be energy loss when the water flows in the third heat exchange tube 130, the flow rate of the water flow in the inlet section will be higher than the flow rate of the water flow in the outlet section. In this embodiment, the inlet section of the third heat exchange tube 130 is set in the first zone 101 where the airflow velocity V is higher, and the outlet section of the third heat exchange tube 130 is set in the second zone 102 where the airflow velocity V is lower. Since the heat exchange efficiency of the heat exchange tube is proportional to the flow velocity inside and outside the tube, and the temperature difference between the inside and outside of the tube at the inlet section is larger, and the airflow velocity V outside the tube at the inlet section in the first zone 101 is higher, the heat exchange per unit area in this area is increased more; similarly, the airflow velocity V outside the tube at the outlet section of the second zone 102 is relatively lower, and the temperature difference between the inside and outside of the tube at the outlet section is relatively lower, so the heat exchange per unit area in this area is reduced less, so that the overall heat exchange of the coil heat exchange assembly 100 is increased, and the heat exchange efficiency of the coil heat exchange assembly 100 is improved.

[0096] like Figure 1 As shown, an embodiment of the present application further provides a coil heat exchanger, comprising an airflow driving assembly 200 and a coil heat exchange assembly 100 proposed in the present application or any embodiment of the present application, wherein the airflow driving assembly 200 is installed on one side of the coil heat exchange assembly 100 along the first direction X.

[0097] The airflow driving assembly 200 may be a fan, and the fan may be provided as one or more fans. The airflow driving assembly 200 may be connected to the housing 160 of the coil heat exchange assembly 100 .

[0098] The coil heat exchanger of this embodiment has the same beneficial effects as the coil heat exchange assembly 100 proposed in this application or any embodiment of this application.

[0099] An embodiment of the present application also provides a HVAC device, including the coil heat exchanger proposed in the present application or any embodiment of the present application.

[0100] The HVAC equipment may also include other components, such as a heat exchange water supply system, etc. The water outlet of the heat exchange water supply system is connected to the water inlet 143 of the coil heat exchange assembly 100, and the water inlet of the heat exchange water supply system is connected to the water outlet 144 of the coil heat exchange assembly 100. The heat exchange water supply system is used to heat or cool the water flow. When the coil heat exchange assembly 100 is used to provide heating for the environment, the heat exchange water supply system heats the water flow to provide hot water to the coil heat exchange assembly 100. The heat exchange water supply system can be specifically provided with a heating device, such as a gas heating device, an electric heating pipe, etc., to heat the water flow; when the coil heat exchange assembly 100 is used to provide cooling for the environment, the heat exchange water supply system can cool the water flow. The heat exchange water supply system can be specifically provided with a cooling device, such as an evaporator, etc., to cool the water flow.

[0101] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A coil heat exchange assembly, applied to a coil heat exchanger having an airflow driving assembly, wherein the airflow driving assembly is used to drive airflow to flow through the coil heat exchange assembly along a first direction, characterized in that: The coil heat exchange assembly has a first area and a second area arranged along a second direction, along the second direction, the airflow velocity formed by the airflow driving assembly in the first area is higher than the airflow velocity in the second area, and the second direction intersects with the first direction; At least one first heat exchange tube is arranged in the first zone, and at least one second heat exchange tube is arranged in the second zone; the first heat exchange tube and the second heat exchange tube are connected in parallel between the water flow inlet and the water flow outlet of the coil heat exchange assembly, and the tube path from the inlet to the outlet of the first heat exchange tube is smaller than the tube path from the inlet to the outlet of any second heat exchange tube.

2. The coil heat exchange assembly according to claim 1, characterized in that: Each of the first heat exchange tubes includes a U-shaped tube or multiple U-shaped tubes connected in series, each of the second heat exchange tubes includes multiple U-shaped tubes connected in series, and the number of the U-shaped tubes in the second heat exchange tubes is greater than the number of the U-shaped tubes in the first heat exchange tubes, each of the U-shaped tubes extends along a third direction, and the third direction, the second direction and the first direction intersect each other.

3. The coil heat exchange assembly according to claim 1, characterized in that: The coil heat exchange assembly also includes at least one third heat exchange tube, and the third heat exchange tube, the first heat exchange tube and the second heat exchange tube are connected in parallel between the water inlet and the water outlet, and the third heat exchange tube includes a water inlet section and a water outlet section that are connected, the water inlet section is connected to the water inlet, and the water outlet section is connected to the water outlet, the water inlet section is arranged in the first area, and the water outlet section is arranged in the second area.

4. The coil heat exchange assembly according to claim 3, characterized in that: The area of ​​the maximum flow cross section of the water inlet section is less than or equal to the area of ​​the minimum flow cross section of the water outlet section.

5. The coil heat exchange assembly according to claim 4, characterized in that: The water inlet section includes a U-shaped tube or multiple U-shaped tubes connected in series, and the water outlet section includes multiple U-shaped tubes connected in parallel. The inlets of the multiple U-shaped tubes connected in parallel in the water outlet section are all connected to the outlet of the water inlet section, and each of the U-shaped tubes extends along a third direction, and the third direction, the second direction and the first direction intersect each other.

6. The coil heat exchange assembly according to any one of claims 1 to 5, characterized in that: There are two second zones. Along the second direction, the first zone is arranged in the middle of the coil heat exchange assembly, and along the second direction, the two second zones are arranged on opposite sides of the first zone respectively.

7. The coil heat exchange assembly according to any one of claims 3 to 5, characterized in that: The coil heat exchange assembly also includes a water distribution and collection component, which has the water inlet, the water outlet, multiple water inlet splitters and multiple water outlet splitters. The inlet of the first heat exchange tube, the inlet of the second heat exchange tube and the inlet of the third heat exchange tube are respectively connected to the water inlet through at least one of the water inlet splitters, and the outlet of the first heat exchange tube, the outlet of the second heat exchange tube and the outlet of the third heat exchange tube are respectively connected to the water outlet through at least one of the water outlet splitters, and the number of the water outlet splitters is greater than the number of the water inlet splitters.

8. The coil heat exchange assembly according to claim 7, characterized in that: The water inlet branch port is connected to a water inlet branch pipe, and the water outlet branch port is connected to a water outlet branch pipe. The inlet of the first heat exchange tube, the inlet of the second heat exchange tube, and the inlet of the third heat exchange tube are respectively connected to the corresponding water inlet branch port through the water inlet branch pipe, and the outlet of the first heat exchange tube, the outlet of the second heat exchange tube, and the outlet of the third heat exchange tube are respectively connected to the corresponding water outlet branch port through the water outlet branch pipe.

9. A coil heat exchange assembly, applied to a coil heat exchanger having an airflow drive assembly, wherein the airflow drive assembly is used to drive airflow to flow through the coil heat exchange assembly along a first direction, characterized in that: The coil heat exchange assembly has a first area and a second area arranged along a second direction, along the second direction, the airflow velocity formed by the airflow driving assembly in the first area is higher than the airflow velocity in the second area, and the second direction intersects with the first direction; The coil heat exchange assembly includes at least one third heat exchange tube, and the third heat exchange tube includes a water inlet section and a water outlet section that are connected to each other. The water inlet section is connected to the water inlet of the coil heat exchange assembly, and the water outlet section is connected to the water outlet of the coil heat exchange assembly. The water inlet section is arranged in the first area, and the water outlet section is arranged in the second area.

10. The coil heat exchange assembly according to claim 9, characterized in that: The water inlet section includes a U-shaped tube or multiple U-shaped tubes connected in series, and the water outlet section includes multiple U-shaped tubes connected in parallel. The inlets of the multiple U-shaped tubes connected in parallel in the water outlet section are all connected to the outlet of the water inlet section, and each of the U-shaped tubes extends along a third direction, and the third direction, the second direction and the first direction intersect each other.

11. A coil heat exchanger, characterized in that: include: Air flow drive assembly; In the coil heat exchange assembly according to any one of claims 1 to 10, the airflow driving assembly is arranged on one side of the coil heat exchange assembly along the first direction.

12. The coil heat exchanger according to claim 11, characterized in that: Along the first direction, the inlet of the first heat exchange tube is located on a side of the outlet of the first heat exchange tube away from the airflow driving component; And / or, along the first direction, the inlet of the second heat exchange tube is located on a side of the outlet of the second heat exchange tube away from the airflow driving component.

13. A HVAC equipment, characterized in that: Comprising the coil heat exchanger according to claim 11 or 12.

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