CN118208760A

CN118208760A - Coil pipe heat exchanger and heating ventilation equipment

Info

Publication number: CN118208760A
Application number: CN202410378110.5A
Authority: CN
Inventors: 叶斌; 黎举辉; 谢绍溶; 于丽君
Original assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Chongqing Midea General Refrigeration Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Current assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Chongqing Midea General Refrigeration Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2024-03-29
Filing date: 2024-03-29
Publication date: 2024-06-18

Abstract

The application relates to the technical field related to heating and ventilation components and discloses a coil heat exchanger and heating and ventilation equipment, wherein the coil heat exchanger comprises a water collecting and distributing assembly and a heat exchange assembly, and a water inlet channel and a water outlet channel which are mutually isolated are arranged in the water collecting and distributing assembly; the heat exchange assembly comprises a plurality of coils, each coil is provided with a water inlet end and a water outlet end, the water inlet ends of the coils are respectively connected with the water collecting assembly and are respectively communicated with the water inlet channel, and the water outlet ends of the coils are respectively connected with the water collecting assembly and are respectively communicated with the water outlet channel. The coil heat exchanger has the advantages of simple structure, fewer parts and convenience in assembly, improves the processing and assembling efficiency of the coil heat exchanger, and reduces the production cost.

Description

Coil pipe heat exchanger and heating ventilation equipment

Technical Field

The application relates to the technical field related to heating and ventilation components, in particular to a coil heat exchanger and heating and ventilation equipment.

Background

This section provides merely background information related to the application, which is not necessarily prior art.

At present, the water diversion scheme of the fan coil is mainly as follows: the water inlet pipe of the main system is connected with the water distribution joint, and water enters the water distribution joint from the water inlet pipe; the water diversion connector is connected with each branch water inlet branch pipe, and water is diverted to each water inlet branch pipe through the water diversion connector; each water inlet branch pipe is connected to the heat exchange pipe of each branch pipe, and water flows into the heat exchange pipe of each corresponding flow path from each branch pipe; each water outlet branch pipe is communicated with the heat exchange pipe of each flow path and is connected with the water collecting joint, and water flows out from the heat exchange pipe, flows through each water outlet branch pipe and then is collected to the water collecting joint; the water collecting joint is connected with a water outlet pipe of the main system, and water flows into the water outlet pipe of the main system through the water collecting joint and returns to the main system. The total parts of the water collecting component are more, the structure is more complex, and the assembly efficiency is lower.

Disclosure of Invention

The application aims to at least alleviate the problems of complex structure and low assembly efficiency of the water distribution and collection component. The aim is achieved by the following technical scheme:

The first aspect of the application provides a coil heat exchanger, which comprises a water collecting and distributing assembly and a heat exchange assembly, wherein a water inlet channel and a water outlet channel which are mutually isolated are arranged in the water collecting and distributing assembly; the heat exchange assembly comprises fins and a plurality of coils, each coil is provided with a water inlet end and a water outlet end, the water inlet ends of the coils are respectively connected with the water collecting assembly and are respectively communicated with the water inlet channel, the water outlet ends of the coils are respectively connected with the water collecting assembly and are respectively communicated with the water outlet channel, and the fins are connected to the coils.

According to the coil heat exchanger, the water inlets of the coils of the heat exchange assembly are communicated through the water inlet channels, the water outlets of the coils are communicated through the water outlet channels, and the water inlet channels and the water outlet channels are integrated on the water collecting and distributing assembly.

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

In some embodiments of the present application, the water collecting and distributing assembly includes a housing, the housing has a receiving cavity therein, the water inlet channel and the water outlet channel are formed in the receiving cavity, the housing is disposed at one end of the heat exchange assembly, a plurality of communication ports are disposed on a side wall of the housing facing the heat exchange assembly at intervals, and the coil is hermetically connected to the communication ports and is communicated with the receiving cavity through the communication ports.

In some embodiments of the present application, the plurality of communication ports includes a plurality of first communication ports disposed at intervals and a plurality of second communication ports disposed at intervals, all of the first communication ports correspond to positions of the water inlet channels and are communicated with the water inlet channels, the water inlet ends of the coils are connected to the first communication ports in a sealing manner, all of the second communication ports correspond to positions of the water outlet channels and are communicated with the water outlet channels, and the water outlet ends of the coils are connected to the second communication ports in a sealing manner.

In some embodiments of the present application, the water inlet ends of the plurality of coils are hermetically connected to the first communication port in a one-to-one correspondence, and the water outlet ends of the plurality of coils are hermetically connected to the second communication port in a one-to-one correspondence.

In some embodiments of the present application, a first water return structure is further disposed in the casing, at least one of the plurality of coils is a first coil, each of the first coils includes a first heat exchange tube and a second heat exchange tube, an outlet of the first heat exchange tube and an inlet of the second heat exchange tube are both disposed towards the water collecting assembly, and in the same first coil, an outlet of the first heat exchange tube and an inlet of the second heat exchange tube are communicated through the first water return structure, so that the first heat exchange tube and the second heat exchange tube are communicated in series.

In some embodiments of the present application, the water inlet channel and the water outlet channel are respectively disposed at two sides of the first water return structure.

In some embodiments of the present application, a receiving cavity is formed in the housing, and the first water return structure is connected to an inner wall surface of the housing and divides the receiving cavity into the water outlet channel and the water inlet channel.

In some embodiments of the present application, the first water return structure is provided with a return channel, at least two coils of the plurality of coils are first coils, and at least two first heat exchange tubes are communicated with the corresponding second heat exchange tubes through the same return channel.

In some embodiments of the present application, at least two first coils of the plurality of coils are provided, the first water return structure is provided with a plurality of return channels, and the return channels are provided between all the first heat exchange tubes and the corresponding second heat exchange tubes in a one-to-one correspondence.

In some embodiments of the present application, the first water return structure includes a plurality of protruding blocks disposed at intervals, adjacent protruding blocks are connected through a partition board, the protruding blocks and the partition board are both connected to an inner wall surface of the housing, and the backflow channel is disposed on each protruding block.

In some embodiments of the application, the first water return structure is a unitary structure;

And/or the first water return structure and the shell are of an integrated structure or a split assembly structure.

In some embodiments of the present application, the casing includes a casing body and a sealing plate, a first opening is disposed on a side of the casing body facing the heat exchange component, a first groove and a second groove are isolated from each other in the casing body, the direction of the notch of the first groove and the direction of the notch of the second groove are consistent with the direction of the first opening, the sealing plate is sealed in the first opening, and forms the water inlet channel with the first groove, forms the water outlet channel with the second groove, and all the communication ports are disposed on the sealing plate.

In some embodiments of the application, the heat exchange assembly further comprises a housing, and the seal plate is attached to an end face of the housing.

In some embodiments of the application, one end of the housing is provided with an end plate, by means of which the sealing plate is connected to the end face of the housing.

In some embodiments of the application, the housing body is a unitary structure;

And/or the sealing plate is of an integrated structure.

In some embodiments of the application, the water diversion assembly further comprises a gasket disposed sealingly between the seal plate and the housing body.

In some embodiments of the present application, the sealing gasket covers the first opening, the sealing gasket is provided with a plurality of through holes, the through holes are in one-to-one correspondence with the communication holes and are coaxially arranged, and the coil pipe passes through the communication holes and is in sealing connection with the through holes.

In some embodiments of the present application, a plurality of first through holes are disposed at positions of the sealing gasket corresponding to the water inlet channel, a plurality of second through holes are disposed at positions of the sealing gasket corresponding to the water outlet channel, the plurality of first through holes are disposed coaxially in one-to-one correspondence with the plurality of first through holes, the water inlet ends of the plurality of coils penetrate through the first through holes in one-to-one correspondence and are in sealing connection with the first through holes, the plurality of second through holes are disposed coaxially in one-to-one correspondence with the plurality of second through holes, and the water outlet ends of the plurality of coils uniformly penetrate through the second through holes in one-to-one correspondence and are in sealing connection with the second through holes.

In some embodiments of the application, a plurality of the coils are connected to the gasket and the seal plate by expansion joints.

In some embodiments of the application, the water diversion assembly further comprises a water inlet joint and a water outlet joint, wherein the water inlet joint and the water outlet joint are connected to the shell body, the water inlet joint is communicated with the water inlet channel, and the water outlet joint is communicated with the water outlet channel.

In some embodiments of the application, the water inlet fitting is of unitary construction with the housing body;

And/or the water outlet joint and the shell body are of an integrated structure.

In some embodiments of the application, the water diversion assembly further comprises a vent assembly, the vent assembly is communicated with the water outlet channel, and the water outlet joint and/or the shell are/is connected with the vent assembly;

And/or, the water collecting and distributing assembly further comprises a water draining assembly, the water draining assembly is communicated with the water inlet channel, and the water inlet joint and/or the shell are/is connected with the water draining assembly.

A second aspect of the present application provides a heating and ventilation device, comprising a fan, and a coil heat exchanger according to the present application or any embodiment of the present application, where the fan is disposed on one side of the coil heat exchanger.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic illustration of a coiled tube heat exchanger according to some embodiments of the present application;

FIG. 2 is a split schematic of FIG. 1;

FIG. 3 is a schematic view of another view of FIG. 2;

FIG. 4 is a schematic, partial flow schematic diagram of the coil heat exchanger shown in FIG. 3;

FIG. 5 is a split schematic of a coiled tube heat exchanger according to some embodiments of the present application;

FIG. 6 is a schematic, partial flow schematic diagram of the coil heat exchanger shown in FIG. 5;

FIG. 7 is a split schematic of a coiled tube heat exchanger according to some embodiments of the present application;

FIG. 8 is a schematic flow diagram of the coil heat exchanger shown in FIG. 7;

FIG. 9 is a split schematic of a coiled tube heat exchanger according to some embodiments of the present application;

FIG. 10 is a schematic flow diagram of the coil heat exchanger shown in FIG. 9;

FIG. 11 is a split schematic view of a coiled tube heat exchanger provided in some embodiments of the present application;

FIG. 12 is a split schematic view of a coiled tube heat exchanger provided in some embodiments of the present application;

FIG. 13 is a schematic diagram of a coiled tube heat exchanger according to some embodiments of the present application;

FIG. 14 is an enlarged view of a portion of FIG. 13;

FIG. 15 is a schematic illustration of a seal plate and coil interference seal for a coil heat exchanger provided in some embodiments of the present application;

FIG. 16 is a schematic illustration of a seal plate of a coil heat exchanger with a seal ring sealing the coil in accordance with some embodiments of the present application;

FIG. 17 is a schematic illustration of a gasket-to-gasket seal for a coil heat exchanger according to some embodiments of the present application;

Fig. 18 is an enlarged view of a portion T of fig. 17;

FIG. 19 is a split schematic view of the coil heat exchanger shown in FIG. 17;

FIG. 20 is a schematic view of a split of a shell body, a water inlet fitting and a water outlet fitting of a coil heat exchanger according to some embodiments of the application;

FIG. 21 is a schematic view of the housing body of FIG. 20 from another perspective;

FIG. 22 is a schematic view in partial cross-section of the assembled shell body, water inlet fitting and water outlet fitting of the coil heat exchanger of FIG. 20;

FIG. 23 is a schematic view of a split of a shell body, a water inlet fitting and a water outlet fitting of a coil heat exchanger according to some embodiments of the present application;

FIG. 24 is a schematic view of another view angle Zhou Xiangkuang shown in FIG. 23;

FIG. 25 is a schematic view of a split of a shell body, a first water return structure, a water inlet fitting, and a water outlet fitting of a coiled tubing heat exchanger provided in some embodiments of the present application;

FIG. 26 is a schematic view of the housing body and the first water return structure shown in FIG. 25 from another perspective;

FIG. 27 is a split schematic view of a coiled tube heat exchanger provided in some embodiments of the present application;

fig. 28 is a schematic diagram illustrating the assembly of a coil heat exchanger and a fan in accordance with some embodiments of the present application.

The reference numerals are as follows:

10. a coiled tube heat exchanger;

100. A water-separating assembly; 101. a water inlet channel; 102. a water outlet channel; 110. a housing; 111. a housing body; 1111. a first opening; 1112. a top plate; 1113. a circumferential frame; 1114. a water inlet through hole; 1115. a water outlet through hole; 1116. sealing the joint; 1117. a receiving chamber; 112. a sealing plate; 1121. flanging; 1122. sealing the connecting surface; 1123. solder; 1124. a seal ring; 113. a first groove; 114. a second groove; 115. a first communication port; 116. a second communication port; 117. a third communication port; 118. a communication port; 120. a first water return structure; 121. a return passage; 1211. a first return channel; 1212. a second return passage; 122. a bump; 123. a partition plate; 124. a partition plate; 130. a sealing gasket; 131. a first through hole; 132. a second through hole; 133. a third through hole; 134. a through hole; 140. a water inlet joint; 150. a water outlet joint; 160. an exhaust assembly; 170. a drainage assembly;

200. A heat exchange assembly; 210. a coiled pipe; 201. a first long U-shaped tube; 202. a second long U-shaped tube; 203. a third long U-shaped tube; 211. a water inlet end; 212. a water outlet end; 220. a first coil; 221. a first heat exchange tube; 222. a second heat exchange tube; 230. a housing; 231. an air outlet; 232. an end plate; 240. a fin;

20. A blower;

X, a first direction; y, second direction; z, third direction.

Detailed Description

Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Accordingly, the example term "below … …" may include both upper and lower orientations.

As shown in fig. 1-28, a coil heat exchanger 10 is provided according to an embodiment of the present application, including a water diversity assembly 100 and a heat exchange assembly 200. The water collecting and distributing assembly 100 is internally provided with a water inlet channel 101 and a water outlet channel 102, and the water outlet channel 102 and the water inlet channel 101 are mutually separated. The heat exchange assembly 200 includes a plurality of coils 210, each coil 210 has a water inlet 211 and a water outlet 212, the nozzle on the water inlet 211 is a water inlet, the nozzle on the water outlet 212 is a water outlet, the water collecting and distributing assembly 100 is connected with the water inlet 211 of each coil 210, the water inlet of each coil 210 is communicated with the water inlet channel 101 of the water collecting and distributing assembly 100, the water collecting and distributing assembly 100 is also connected with the water outlet 212 of each coil 210, and the water outlet of each coil 210 is communicated with the water outlet channel 102 of the water collecting and distributing assembly 100.

The coil heat exchanger 10 is usually used in combination with a fan 20, the fan 20 may be disposed on one side of the coil heat exchanger 10, and the fan 20 is used to drive airflow to flow through the coil heat exchanger 10, so that when the airflow flows through the coil heat exchanger 10, the airflow exchanges heat with water in the coil heat exchanger 10.

The heat exchange assembly 200 is a main component for performing heat exchange, and specifically, the heat exchange assembly 200 exchanges heat between water flowing in the heat exchange assembly 200 and a medium such as air outside the heat exchange assembly 200. The plurality of coils 210 refers to two or more coils 210, each coil 210 may be understood as a pipe group flowing from the water inlet channel 101 to the water outlet channel 102, the water inlet of each coil 210 may be one, two or more, and the water outlet of each set of coils 210 may be one, two or more, for example, in some embodiments, at least one water inlet pipe of one coil 210 is one, and the water outlet pipe is multiple, and the water outlet pipes are all connected to and communicated with the water inlet pipe. Wherein each coil 210 has at least one bending reflux, in short, each coil 210 includes at least two heat exchange sections, and the water flow directions of the two heat exchange sections are approximately opposite, more specifically, it is understood that each coil 210 includes at least one long U-shaped tube.

The water diversion assembly 100 may include a housing 110, the water inlet channel 101 and the water outlet channel 102 are all disposed in the housing 110, and the water inlet channel 101 and the water outlet channel 102 are independent channels. The water collecting and distributing assembly 100 can be provided with a water inlet joint 140 and a water outlet joint 150, wherein the water inlet joint 140 can be connected with the part of the water collecting and distributing assembly 100 forming the water inlet channel 101 and is communicated with the water inlet channel 101, and a water outlet of the heat exchange water supply system is connected with the water inlet joint 140 and supplies water to the water inlet channel 101 through the water inlet joint 140; the water outlet joint 150 can be connected with the part of the water collecting and distributing assembly 100 forming the water outlet channel 102 and communicated with the water outlet channel 102, the water inlet of the heat exchange water supply system is connected with the water outlet joint 150, and water flow in the heat exchange assembly 200 flows back to the heat exchange water supply system through the water outlet joint 150. The heat exchange water supply system is used for heating or cooling water flow, and when the heat exchange assembly 200 is used for providing heating for the environment, the heat exchange water supply system heats the water flow so as to provide hot water for the heat exchange assembly 200, and the heat exchange water supply system can be provided with a heating device, such as a gas heating device, an electric heating tube and the like, so as to heat the water flow; when the heat exchange assembly 200 is used for providing refrigeration for the environment, the heat exchange water supply system can cool the water flow, and the heat exchange water supply system can be specifically provided with a cooling device, such as an evaporator, and the like, to cool the water flow.

The water collecting and distributing assembly 100 may be provided with a plurality of first communication ports 115 corresponding to the water inlet channels 101, where the plurality of first communication ports 115 are connected with the water inlet ends 211 of the plurality of coils 210, specifically, one first communication port 115 may be connected with the water inlet end 211 of one coil 210, specifically, the water inlet end 211 of the coil 210 may be in plug-in sealing connection with the first communication port 115, for example, the water inlet end 211 of the coil 210 may be inserted into the first communication port 115 and be in sealing connection with the first communication port 115. The water collecting and distributing assembly 100 may be provided with a plurality of second communication ports 116 corresponding to the water outlet channels 102, where the plurality of second communication ports 116 are connected with the water outlet ends 212 of the plurality of coils 210, specifically, one second communication port 116 is connected with the water outlet end 212 of one coil 210, specifically, the water outlet end 212 of the coil 210 may be plug-in and seal-connected with the second communication port 116, for example, the water outlet end 212 of the coil 210 may be inserted into the second communication port 116 and seal-connected with the second communication port 116. After flowing into the water inlet channel 101 through the water inlet channel 101, the water flows into the water inlet ends 211 of the coils 210, flows through the water outlet ends 212 of the coils 210, flows into the water outlet channel 102, and flows out through the water outlet channel 102. Wherein the water stream exchanges heat with the air as it passes through each coil 210.

In the coil heat exchanger 10 of the embodiment, the water inlets of the plurality of coils 210 of the heat exchange assembly 200 are all communicated through the water inlet channel 101, the water outlets of the plurality of coils 210 are all communicated through the water outlet channel 102, the water inlet channel 101 and the water outlet channel 102 are integrated on the water collecting and distributing assembly 100, the heat exchanger is simple in structure, fewer in parts and convenient to assemble, the processing and assembling efficiency of the coil heat exchanger 10 is improved, and the production cost is reduced.

In some technologies, the coil heat exchanger is connected with a plurality of branch pipes through a water diversion connector, the plurality of branch pipes are connected with the water inlets of the heat exchange pipes, and meanwhile, the water collection connector is connected with the plurality of branch pipes, so that the heat exchange pipes are connected with the water collection connector through the branch pipes, and water in the plurality of heat exchange pipes is collected and shunted. The water diversion connector, the water collection connector and the branch pipe are independent parts, so that the water diversion connector, the branch pipe connected with the water diversion connector, the water outlet structure and the branch pipe connected with the water diversion connector, the inlet of the branch pipe and the inlet of the heat exchange pipe and the water outlet of the heat exchange pipe are all required to be assembled, the parts are more, the structure assembling process is complicated, time and labor are wasted, and the influence on the preparation cost of the coil heat exchanger is larger; the water inlet component (the water diversion joint and the corresponding branch pipe form the water inlet component) and the water outlet component (the water collection joint and the corresponding branch pipe form the water outlet component) are welded and assembled separately, so that the water inlet component is easy to deform, and an additional mounting plate is needed to be added for fixing; the water diversion joint and the water collection joint are usually disc-shaped, and are smaller than the arrangement range of the inlets and the outlets of the heat exchange tubes, so that the branch pipes are mostly bent long branch pipes, and the occupied space is large. Meanwhile, as the parts are scattered and more, the water distribution and collection assembly occupies larger invalid space, the parts are disordered, the attractiveness is poor, and the integrated design of the coil heat exchanger is not facilitated. Furthermore, the water flow flowing into the heat exchange tube flows out of the water collecting joint and then needs to flow through the branch pipe to enter the heat exchange tube, and the water flow flowing out of the heat exchange tube also needs to flow out of the heat exchange tube and then flows back through the branch pipe, so that the tube side of the heat exchange assembly is long and the water resistance is large.

In the coil heat exchanger 10 of the embodiment, the inlet end of the coil 210 is directly connected with the water collecting and distributing assembly 100, and the outlet end of the coil 210 is also directly connected with the water collecting and distributing assembly 100, so that a branch pipe is not required to be arranged, the structure is simple, the assembly is convenient, the water flow is shorter, the water resistance is reduced, and the heat exchange efficiency is improved; meanwhile, the water collecting and distributing assembly 100 is integrated with the water inlet channel 101 and the water outlet channel 102, scattered water distributing joints and water collecting joints are not required to be independently arranged, parts are reduced, members are not easy to deform, ordered arrangement of the water collecting and distributing assembly 100 is facilitated, the messy degree of the parts is reduced, the invalid space occupied by the parts can be reduced, and the integration degree and the attractiveness of the coil heat exchanger 10 are improved.

In some embodiments, fins 240 may be disposed in addition to the coil 210 of the heat exchange assembly 200, that is, the coil heat exchanger 10 may be a fin-tube heat exchanger, and the heat exchange efficiency of the heat exchanger may be improved by exchanging heat between the coil 210 and the air flow through the fins 240. Wherein, the fins 240 may be connected to the coil pipe 210 by expansion, welding, etc., and in some implementations, the fins 240 are provided with mounting holes, and the coil pipe 210 is inserted into the mounting holes, so that the fins 240 are sleeved on the coil pipe 210. The number of fins 240 may be plural, and the plurality of fins 240 may be spaced apart, for example, the plurality of fins 240 may be spaced apart on the coil 210 along the first direction X.

Optionally, the heat exchange assembly 200 may further be provided with a housing 230, where the plurality of coils 210 are disposed in the housing 230, one side (for convenience of description, the first side) of the housing 230 is provided with an air inlet, and the side (for convenience of description, the second side) of the housing 230 opposite to the air inlet is provided with an air outlet 231. The water diversion assembly 100 may be disposed on an end surface of the housing 230, wherein the end surface of the housing 230 is perpendicular to the first side surface of the housing 230.

It should be noted that, the first side may be partially hollowed out to form the air inlet, or the first side may be entirely hollowed out, that is, the shell 230 does not have a side wall on the first side to form the air inlet; the second side may be partially hollowed out to form the air outlet 231, or the second side may be entirely hollowed out, that is, the housing 230 does not have a sidewall on the second side, so as to form the air outlet 231. In fig. 28, the second side is entirely hollowed out to form the air outlet 231, and in order to simplify the drawing, fig. 28 only shows the actual structure of the coil heat exchanger 10 at a partial position of the second side, but does not show the entire internal structure of the coil heat exchanger.

Wherein the housing 230 may be of a generally rectangular parallelepiped configuration. The air inlet and outlet 231 may also be disposed on two adjacent sides of the housing 230. The end surface of the housing 230 for connection with the water diversion and collection assembly 100 may be hollowed out, i.e., the end surface of the housing 230 may be an open structure, for convenience of description, defined as a second opening, and the water diversion and collection assembly 100 is connected with the side surface of the housing 230 so as to be fixed at the second opening of the end surface of the housing 230, that is, the housing 230 and the water diversion and collection assembly 100 may be fixedly connected, and the water diversion and collection assembly 100 is used as an end wall of the housing 230; the end face of the housing 230 may also be of solid construction.

The flow paths of the plurality of coils 210 may be identical or different. The coil 210 may include at least two heat exchange sections, where multiple heat exchange sections are sequentially connected in series, and each heat exchange section may be one heat exchange tube or multiple heat exchange tubes, and when any heat exchange section has multiple heat exchange tubes, the multiple heat exchange tubes are arranged in parallel. That is, in the water flow direction, the number of heat exchange tubes may be different at different positions, for example, the outlet of one water inlet tube may be connected to a plurality of water outlet tubes, the outlets of a plurality of water inlet tubes may be connected to the same water inlet tube, or one water inlet tube may be communicated with one water outlet tube. All heat exchange tubes of the multi-section heat exchange section can be approximately the same in length, two ends of all heat exchange tubes are respectively approximately aligned, and the multi-section heat exchange section forms a coil 210 structure which is sequentially bent and folded.

In one implementation, as shown in fig. 1 and 2, any one heat exchange tube of the multi-segment heat exchange segment is arranged along a first direction X, first ends of all heat exchange tubes along the first direction X may be substantially aligned, second ends of all heat exchange tubes along the first direction X may be substantially aligned, and the plurality of heat exchange tubes may be disposed at intervals along a second direction Y and a third direction Z. The water collecting and distributing assembly 100 is disposed at a first end of the heat exchange tubes along a first direction X, wherein the first ends of the heat exchange tubes of the first heat exchange section are all communicated with the water inlet channel 101 of the water collecting and distributing assembly 100, as shown in fig. 3 to 10, water flowing into the water inlet channel 101 flows along a path B from the water inlet channel 101 to the first ends of the heat exchange tubes of the first heat exchange section, then flows to the second ends along the first direction X through the heat exchange tubes of the first heat exchange section, enters the heat exchange tubes of the second heat exchange section from the second ends of the heat exchange tubes of the first heat exchange section, then flows back to the first ends of the heat exchange tubes of the second heat exchange section along a direction opposite to the first direction X from the heat exchange tubes of the second heat exchange section, a reflux was formed. In some embodiments, as shown in fig. 7, the flow path of the heat exchange assembly 200 is shorter, the first end of the second heat exchange section is communicated with the water outlet channel 102, and the water flows back to the water outlet channel 102 along the path D through the first end of the heat exchange tube of the second heat exchange section, that is, the water flows through an elongated U-shaped tube, and the process can be understood by referring to the water flow path A4 of fig. 8. In other embodiments, as shown in fig. 9 and 10, the flow of the heat exchange assembly 200 is longer, the first end of the second heat exchange section may be further communicated with the first end of the third heat exchange section, the water flow flows into the first end of the heat exchange tube of the third heat exchange section along the path C of fig. 9 through the first end of the heat exchange tube of the second heat exchange section, then flows from the heat exchange tube of the third heat exchange section to the second end of the heat exchange tube of the third heat exchange section along the first direction X, and then flows back to the first end through the fourth heat exchange section to form a second backflow, the first end of the fourth heat exchange section may be communicated with the water outlet channel 102, and the water flow flows back to the water outlet channel 102 along the path D of fig. 9 through the first end of the heat exchange tube of the fourth heat exchange section; that is, the water flow passes through two long U-shaped pipes (which pass through the first long U-shaped pipe 201 and the second long U-shaped pipe 202 in turn), and the process can also be understood with reference to the water flow path A5 of fig. 11. Each coil 210 or a portion of coils 210 may also include an even number of heat exchange sections (i.e., three long U-shaped tubes or more) of 6 or more to form more times of reflux, and a specific arrangement may refer to a cyclic arrangement of the first section and the fourth section, where three long U-shaped tubes are provided for each coil 210, as shown in fig. 3, for example, a water stream flowing out of the first long U-shaped tube 201 flows out of the first long U-shaped tube 201 along a path C1, flows through a first reflux channel 1211, flows into the second long U-shaped tube 202, a water stream flowing out of the second long U-shaped tube 202 flows out of the second long U-shaped tube 202 along a path C2, flows through a second reflux channel 1212, and flows into the third long U-shaped tube 203, the water flowing out of the second long U-shaped tube 202 flows back to the water outlet channel 102 along the path D shown in FIG. 3, and the water flow process can also refer to the water flow path A2 shown in FIG. 4.

The primary backflow is a flow path, specifically, the primary backflow refers to a primary backflow flow path from the first end to the second end and from the second end to the first end, the secondary backflow refers to a secondary backflow flow path through which the water flow needs to pass, and similarly, the tertiary backflow and more backflow refers to a backflow flow path through which the water flow needs to pass corresponding times. The first direction X can be the length direction of the heat exchange assembly, the second direction Y can be the width direction of the heat exchange assembly, the third direction Z can be the height direction of the heat exchange assembly, and the first direction X, the second direction Y and the third direction Z can be mutually perpendicular.

Along the flow direction of the water flow, each coil 210 may be connected between the heat exchange tubes connected at the second end by a connector, that is, in the second end, the outlet of the upstream heat exchange tube and the inlet of the downstream heat exchange tube may be connected by a connector, when the upstream heat exchange tube and the downstream heat exchange tube are both heat exchange tubes, the two heat exchange tubes may be connected by a U-shaped connector, the connector and the two heat exchange tubes may be integrally formed, for example, welded into an integrally long U-shaped tube structure, or injection molded into an integrally long U-shaped tube structure, the heat exchange tubes are integrally connected at the second end, which corresponds to one long U-shaped tube with an integrally formed backflow, and in forming two or more backflow flows, the outlet of the upstream long U-shaped tube is connected and connected to the inlet of the downstream long U-shaped tube at the first end, and the U-shaped connection portion of each long U-shaped tube is located at the second end.

It should be noted that, the communication of each coil 210 at the second end may also be achieved by providing a second water return structure of an integral structure. The second water return structure is disposed at a second end of the heat exchange assembly 200 along the first direction X, and the second water return structure may be provided with a water return cavity, where the second end of the upstream heat exchange tube and the second end of the downstream heat exchange tube adjacent along the water flow direction are both communicated with the water return cavity. The plurality of coils 210 can use a second water return structure, specifically, a plurality of water return cavities are arranged on the second water return structure, and the second ends of two adjacent heat exchange tubes in the same coil 210 can be communicated through one water return cavity; in one return flow, when the pressures of the plurality of coils 210 at the second ends are the same, in the same return flow, the second ends of adjacent heat exchange tubes of the plurality of coils 210 may share a return water chamber, e.g., all coils 210 may include one return flow, the second return water structure may be provided with one return water chamber through which the second ends of the first heat exchange sections of all coils 210 communicate with the second ends of the second heat exchange sections; for another example, all coils 210 may include two returns, and the second return water structure may be provided with two spaced and independent return water chambers, with the second ends of the first heat exchange sections of all coils 210 communicating with the second ends of the second heat exchange sections through one of the return water chambers; the second ends of the third heat exchange sections of all coils 210 are in communication with the second ends of the fourth heat exchange sections through another return water chamber.

It should be noted that, in this embodiment, unless otherwise specified, it is mainly described that each coil 210 is formed by one long U-shaped tube or a plurality of long U-shaped tubes are sequentially connected, and the inlet end and the outlet end of each long U-shaped tube are located at the first end of the heat exchange assembly 200, where the number of times of reflux of the coil 210 is identical to the number of U-shaped tubes. For example, as shown in fig. 7 and 8, with one return, only one U-tube is required for each coil 210, with the two side edges of one U-tube side-by-side forming the first and second heat exchange sections of coil 210; for another example, in fig. 9 and 10, with two reflows, each coil 210 includes two U-shaped tubes, the outlet of the first long U-shaped tube 201 is connected to and communicates with the inlet of the second long U-shaped tube 202 at a first end, two side edges of the first long U-shaped tube 201 side by side form a first heat exchange section and a second heat exchange section of the coil 210, and two side edges of the second long U-shaped tube 202 side by side form a third heat exchange section and a fourth heat exchange section of the coil 210. For another example, as shown in fig. 3 to 4, when there are two reflows, each coil 210 includes three U-shaped tubes, the outlet of the first long U-shaped tube 201 is connected to and communicates with the inlet of the second long U-shaped tube 202 at a first end, the outlet of the second long U-shaped tube 202 is connected to and communicates with the inlet of the third long U-shaped tube 203 at a first end, two side edges of the first long U-shaped tube 201 side by side form a first heat exchange section and a second heat exchange section of the coil 210, two side edges of the second long U-shaped tube 202 side by side form a third heat exchange section and a fourth heat exchange section of the coil 210, and two side edges of the third long U-shaped tube 203 side by side form a fifth heat exchange section and a sixth heat exchange section of the coil 210.

When the coil 210 has two or more returns, the first ends of the upstream and downstream heat exchange sections may be in communication with each other by additionally providing a joint, such as a semicircular or U-shaped joint, along the flow direction of the water, and in some embodiments, the first water return structure 120 may be provided on the water collecting and distributing assembly 100, so that the first ends of the upstream and downstream heat exchange sections are in communication with each other by the first water return structure 120.

It should be noted that the relevant upstream and downstream in coil 210 are defined with reference to the flow direction of the water flow, wherein the water flow direction is upstream near the inlet and downstream near the outlet, i.e. the water flow flows from upstream to downstream.

In one embodiment, the water collecting and distributing assembly 100 is further provided with a first water return structure 120, at least one coil 210 of the plurality of coils 210 is a first coil 220, each first coil 220 includes a first heat exchange tube 221 and a second heat exchange tube 222, the first heat exchange tube 221 and the second heat exchange tube 222 are arranged in parallel, an outlet of the first heat exchange tube 221 and an inlet of the second heat exchange tube 222 are both disposed towards the first end of the water collecting and distributing assembly 100, and in the same first coil 220, an outlet of the first heat exchange tube 221 and an inlet of the second heat exchange tube 222 are communicated through the first water return structure 120, so that the first heat exchange tube 221 and the second heat exchange tube 222 are communicated in series.

Wherein, the water inlet channel 101 may be disposed on one side of the first water return structure 120, and the water outlet channel 102 may be disposed on the other side of the first water return structure 120. That is, the first water return structure 120 is disposed between the water inlet channel 101 and the water outlet channel 102, and isolates the water inlet channel 101 and the water outlet channel 102 from each other. Specifically, in one implementation, the water diversion assembly 100 is formed with a receiving cavity 1117, the first water return structure 120 is disposed in the receiving cavity 1117, and the first water return structure 120 divides the receiving cavity 1117 into the water outlet channel 102 and the water inlet channel 101.

It is understood that for a first coil 220, the water inlet of the first coil 220 may be in communication with the inlet of the first heat exchange tube 221 in the first coil 220, the outlet of the first heat exchange tube 221 may be in communication with the inlet of the second heat exchange tube 222 of the first coil 220 via the first water return structure 120, and the outlet of the second heat exchange tube 222 is in communication with the water outlet of the first coil 220.

Wherein the first coil 220 actually, i.e., comprises two or more returns of the coil 210. Some of the coils 210 may be provided as the first coil 220, and some may be provided as coils 210 having only one return flow, or all of the coils 210 may be provided as the first coil 220.

The first heat exchanging pipe 221 and the second heat exchanging pipe 222 may be understood as two heat exchanging pipes connected to each other and communicating at a first end in the first direction X. For example, as shown in fig. 9 and 10, when the first coil 220 has two reflows, the heat exchange tubes in the second heat exchange section (i.e., the outlet section of the first long U-shaped tube 201) and the heat exchange tubes in the third heat exchange section (i.e., the inlet section of the second long U-shaped tube 202) may be used as the first heat exchange tube 221 and the second heat exchange tube 222, in other words, the first heat exchange section and the second heat exchange section are long U-shaped tubes with the second ends connected together, and in the case that the third heat exchange section and the fourth heat exchange section are U-shaped tubes with the second ends connected together, the outlet of the upstream long U-shaped tube and the inlet of the downstream U-shaped tube are connected at the first ends through the first water return structure 120. For another example, as shown in fig. 3 and 4, when the first coil 220 has three times of reflux, the heat exchange tubes in the second heat exchange section (i.e., the outlet section of the first long U-shaped tube 201) and the heat exchange tubes in the third heat exchange section (i.e., the inlet section of the second long U-shaped tube 202) are formed into the first heat exchange tube 221 and the second heat exchange tube 222, and when the heat exchange tubes in the fourth heat exchange section (the outlet section of the second long U-shaped tube 202) and the heat exchange tubes in the fifth heat exchange section (the inlet section of the third long U-shaped tube 203) are formed into the first heat exchange tube 221 and the second heat exchange tube 222, in other words, when the first heat exchange section and the second heat exchange section are formed into the long U-shaped tube in which the second end is formed into the integral, and when the fifth heat exchange section and the sixth heat exchange section are formed into the U-shaped tube in which the second end is formed into the integral, the upstream outlet of the third long U-shaped tube is communicated with the first end of the first return water 120.

In actual arrangement, all heat exchange tubes in the heat exchange assembly 200 that need to be in communication with each other at the first end may be in communication via the same first water return structure 120. For example, in the case of having multiple groups of the first heat exchange tubes 221 and the second heat exchange tubes 222, multiple backflow channels 121 may be correspondingly disposed on the first water return structure 120, so that the multiple groups of the first heat exchange tubes 221 and the second heat exchange tubes 222 are respectively communicated through different backflow channels 121, and when two groups or two groups of pressure differences exist between the multiple groups of the first heat exchange tubes 221 and the second heat exchange tubes 222, a larger backflow channel 121 may also be disposed on the first water return structure 120, and the multiple groups of the first heat exchange tubes 221 and the second heat exchange tubes 222 are communicated through the one backflow channel 121.

In some embodiments, the first water return structure 120 is provided with a return channel 121, at least two coils 210 of the plurality of coils 210 are first coils 220, and at least two first heat exchange tubes 221 are in communication with corresponding second heat exchange tubes 222 through the same return channel 121.

As shown in fig. 9 and 10, the first heat exchange tubes 221 and the second heat exchange tubes 222 are connected by the first return channel 1211, the first heat exchange tubes 221 are isobaric channels, and the second heat exchange tubes 222 are isobaric channels. The first heat exchanging pipes 221 and the second heat exchanging pipes 222 in the same backflow in the plurality of first coils 220 may communicate through the same backflow channel 121, and in this embodiment, the number of backflow channels 121 may be equal to the number of backflow times of the first coils 220 minus one. For example, as shown in fig. 9 and 10, when all of the first coils 220 are refluxed twice, the first water return structure 120 may be provided with one return channel 121 in all of the first coils 220: the heat exchange tubes in the second heat exchange section are in communication with the heat exchange tubes in the third heat exchange section through the return passage 121. For another example, when all the first coils 220 are three-times reflowed, the first water return structure 120 may be provided with two mutually independent reflow channels 121, in all the first coils 220: the heat exchange tubes in the second heat exchange section are communicated with the heat exchange tubes in the third heat exchange section through one of the backflow channels 121, and the heat exchange tubes in the fourth heat exchange section are communicated with the heat exchange tubes in the fifth heat exchange section through the other backflow channel 121.

In other embodiments, as shown in fig. 3, 4 and fig. 5 and 6, at least two coils 210 of the plurality of coils 210 are first coils 220, the first water return structure 120 is provided with a plurality of return channels 121, and the plurality of first heat exchange tubes 221 and the corresponding second heat exchange tubes 222 are provided with return channels 121 in a one-to-one correspondence. That is, each of the first heat exchange tubes 221 and the second heat exchange tube 222 connected at the first end thereof corresponds to one of the return channels 121, and the return channels 121 are connected only to one of the first heat exchange tubes 221 and the second heat exchange tube 222 connected at the first end thereof.

In a specific embodiment, referring to fig. 5 and 6, the plurality of coils 210 are first coils 220 having two backflow processes, so that each first coil 220 includes a set of first heat exchange tubes 221 and second heat exchange tubes 222, and each first coil 220 is provided with one backflow channel 121 corresponding to the first water return structure 120. Wherein fig. 5 and 6 include not only a first coil having two returns, but also at least one coil 210 is a U-shaped tube, and the water flow in the coil 210 follows paths B and D shown in fig. 5, which can also be understood with reference to the water flow path A3 of fig. 6, even though the coil 210 has only one return.

In another embodiment, as shown in fig. 3 and 4, the plurality of coils 210 are first coils 220 having three backflow processes, so that each first coil 220 includes two groups of first heat exchange tubes 221 and second heat exchange tubes 222, and two backflow channels 121 are respectively disposed in the first water return structure 120 corresponding to each first coil 220.

In the solution with a plurality of return channels 121, as shown in fig. 3 and 5, the first water return structure 120 includes a plurality of bumps 122 disposed at intervals, adjacent bumps 122 are connected by a partition 123, the bumps 122 and the partition 123 are connected to an inner wall surface of the housing 110, and each bump 122 is provided with a return channel 121. The bumps 122 and the reflow channels 121 may be disposed in a one-to-one correspondence, or a plurality of reflow channels 121 may be disposed on one bump 122 as required. When the number of the protrusions 122 is large, in order to improve the space utilization, the length direction of a part of the protrusions 122 may be inclined with respect to the top plate 1112 of the housing body 111 (a part of the housing 110 of the diversity water assembly 100), and the inclination directions of two adjacent protrusions 122 may be opposite along the height direction (refer to the third direction Z) of the housing body 111, so that the adjacent protrusions 122 are staggered, so that a plurality of protrusions 122 may be disposed in a smaller space, thereby realizing the arrangement of a larger number of the backflow channels 121. The partition 123 and the bump 122 are disposed in a sealing manner, and specifically, the partition 123 and the bump 122 may be an integral structure, and the partition 123, the bump 122 and the housing body 111 may be an integral structure.

It should be noted that, when there are three or more reflows in one first coil 220, the reflow channels 121 may be provided for the first heat exchange tube 221 and the second heat exchange tube 222 at the first end of each reflow. Taking three backflow in one first coil 220 as an example, the first water return structure 120 is provided with two backflow channels 121 corresponding to the first coil 220, the heat exchange tubes in the second heat exchange section are communicated with the heat exchange tubes in the third heat exchange section through one backflow channel 121, and the heat exchange tubes in the fourth heat exchange section are communicated with the heat exchange tubes in the fifth heat exchange section through the other backflow channel 121.

The first water return structure 120 of the present embodiment may be an integral structure, specifically, the first water return structure 120 may be an injection-molded integral structure, or may be a welded integral structure, etc.

In some embodiments, the water diversion assembly 100 includes a housing 110, a receiving cavity 1117 is formed in the housing 110, and a water inlet channel 101 and a water outlet channel 102 are separately formed in the receiving cavity 1117. As shown in fig. 7 and 8, in the case of not having the first water return structure 120, the partition plate 124 may be directly provided in the accommodating chamber 1117, and the accommodating chamber 1117 may be divided into the water inlet passage 101 and the water outlet passage 102 by the partition plate 124. In the case of the first water return structure 120, it may be that the first water return structure 120 is connected to an inner wall surface of the housing 110 to divide the accommodating chamber 1117 into the water inlet channel 101 and the water outlet channel 102. The housing 110 is connected to one end of the heat exchange assembly 200, i.e., one end of the outer shell 230.

Optionally, a plurality of communication ports 118 are disposed on the side wall of the housing 110 facing the housing 230 and corresponding to the water inlet channel 101, the communication ports 118 are communicated with the accommodating cavity 1117, and the coil 210 is hermetically connected to the communication ports 118 and is communicated with the accommodating cavity 1117 through the communication ports 118.

Wherein, a part of the communication ports 118 may be disposed corresponding to the water inlet channel 101, and these communication ports 118 are defined as first communication ports 115, all the first communication ports 115 are disposed at intervals, and the water inlet ends 211 of all the coils 210 may be connected with the first communication ports 115 in a sealing manner and communicate with the water inlet channel 101 through the first communication ports 115. At least some of the remaining number of communication ports 118 may be disposed corresponding to the outlet channel 102, and these communication ports 118 are defined as second communication ports 116, all of the second communication ports 116 being disposed at intervals, and the outlet ends 212 of all of the coils 210 being sealingly connectable to the second communication ports 116 and communicating with the outlet channel 102 through the second communication ports 116.

Specifically, each first communication port 115 may be in corresponding sealing connection with the water inlet end 211 of one coil 210 and be in communication with the water inlet channel 101, that is, the water inlet ends 211 in all coils 210 are respectively connected to all the first communication ports 115 in one-to-one correspondence, and the circumferential side wall of the water inlet end 211 is in sealing connection with the circumferential wall of the first communication port 115, so as to avoid leakage of water between the water inlet end 211 and the first communication port 115, and meanwhile, the water inlet end 211 is in communication with the water inlet channel 101. The side wall of the casing 110 facing the housing 230 is provided with a plurality of second communication ports 116 corresponding to the water outlet channel 102, all the second communication ports 116 are arranged at intervals, and each second communication port 116 is correspondingly and hermetically connected with the water outlet end 212 of one coil 210 and is communicated with the water outlet channel 102. That is, the water outlet ends 212 of all the coils 210 are respectively connected to all the second communication ports 116 in a one-to-one correspondence manner, and the circumferential side walls of the water outlet ends 212 are in sealing connection with the circumferential walls of the second communication ports 116, so that water is prevented from leaking between the water outlet ends 212 and the second communication ports 116, and the water outlet ends 212 are communicated with the water outlet channel 102.

The housing 110 of the present embodiment may be generally rectangular or oval in shape that mates with the ends of the heat exchange assembly 200.

In some implementations, the side wall of the housing 110 facing the heat exchange assembly 200 may be partially hollowed out to form the first communication port 115 and the second communication port 116. Alternatively, the water inlet ends 211 of the coil pipes 210 may be inserted into the corresponding first communication ports 115 and sealingly connected to the circumferential inner wall of the first communication ports 115. Alternatively, the water outlet end 212 of the coil 210 may be inserted into the corresponding second communication port 116 and sealingly connected to the circumferential inner wall of the second communication port 116.

The housing 110 may be an integrally formed structure, a connected structure, or a detachable sealing connection structure. In some embodiments, the casing 110 includes a casing body 111 and a sealing plate 112, a first opening 1111 is disposed on one side of the casing body 111, a first groove 113 and a second groove 114 that are isolated from each other are disposed on the casing body 111, the notch of the first groove 113 and the notch of the second groove 114 are both consistent with the orientation of the first opening 1111, and the sealing plate 112 is sealed in the first opening 1111 and forms a water inlet channel 101 with the first groove 113 and forms a water outlet channel 102 with the second groove 114. Wherein the sealing plate 112 is located at a side of the case body 111 facing the heat exchange assembly 200, i.e., a side facing the outer case 230, that is, the sealing plate 112 is a sidewall of the case 110 facing the heat exchange assembly 200.

The seal plate 112 may be fixedly coupled to the housing 230 of the heat exchange assembly 200. Specifically, in one implementation, one end of the housing 230 may be an open structure, that is, one end of the housing 230 has a second opening, and the sealing plate 112 covers the second opening of the housing 230 and is fixedly connected to the housing 230, that is, the sealing plate 112 may be used as a side plate (i.e., an end plate) of the housing body 111, and the sealing plate 112 may be understood as an end plate of the housing body 111. In another implementation, the end face of the housing 110 may be a solid structure with the seal plate 112 attached thereto. The sealing plate 112 may be detachably connected to the housing 230 of the heat exchange assembly 200, for example, by a screw, a clamping connection, or the like, or may be non-detachably connected. As shown in fig. 1,2 and 3, alternatively, both sides of the sealing plate 112 in the width direction (which can be understood with reference to the second direction Y) may be provided with flanges 1121, and the housing 230 is positioned between the two flanges 1121. The flange 1121 may be connected to other structures in addition to the positioning housing 230.

As shown in fig. 27, the end of the housing 230 connected to the sealing plate 112 may have an end plate 232, that is, the end of the housing 230 connected to the sealing plate 112 may be provided with the end plate 232, and the sealing plate 112 may be fixedly connected to the end plate 232. Because the upper water diversion and distribution assembly 100 has important water flow distribution function, the requirements on tightness and pressure resistance are high, the outer shell 230 introduces additional end plate 232 parts, and the stress of shaking, falling, impact and the like in the process of transportation, carrying, installation and the like of the whole machine can be borne by the end plate 232 and can not be transferred to the water diversion and distribution assembly 100, so that the sealing effect and the pressure bearing capability of the water diversion and distribution assembly 100 can be maintained. It should be noted that, the coil 210 passes through the end plate 232 additionally provided on the housing 230, and the coil 210 and the end plate 232 of the housing 110 are in a non-sealing structure, and the end plate 232 is connected with other structural members of the whole machine, so as to perform a function of fixing the structure. The end plate 232 of the housing 230 and the housing 230 may be integrally formed, or may be separately assembled.

The sealing plate 112 may be an integrally formed plate structure, and the housing body 111 may be an integrally formed structure. The shell body 111 and the sealing plate 112 may be integrally connected by welding or the like, or may be fixedly connected by screws or the like, and it should be noted that, no matter what connection manner is adopted, a seal should be formed between the sealing plate 112 and the shell body 111, so that the water inlet channel 101 and the water outlet channel 102 may be independent from each other, and water leakage cannot occur, and in particular, the sealing can be realized by means of welding seal, expansion seal, glue seal, rubber gasket (sealing ring) seal, and the like. The first communication port 115 on the sealing plate 112 and the water inlet end 211 of the coil 210 can be connected through welding, sealing ring sealing connection, glue sealing connection, expansion sealing connection and the like, and the second communication port 116 on the sealing plate 112 and the water outlet end 212 of the coil 210 can also be connected through welding, sealing ring sealing connection, glue sealing connection, expansion sealing connection and the like.

In some embodiments, the water diversion assembly 100 further includes a gasket 130, the gasket 130 being sealingly disposed between the seal plate 112 and the housing body 111.

In some embodiments, the first water return structure 120 is connected to the inner wall surface of the shell body 111, and the first water return structure 120 and the shell body 111 are integrally formed, specifically may be an integrally formed structure by injection molding. The first water return structure 120 and the shell body 111 may be made of the same material, for example, the first water return structure 120 and the shell body 111 may be made of metal, and at this time, the first water return structure 120 and the shell body 111 may be integrally formed by welding, powder alloy sintering, sand casting, forging, machining, or the like; the first water return structure 120 and the shell body 111 may be made of ceramic or glass, and at this time, the first water return structure 120 and the shell body 111 may be formed into an integral structure by sintering or the like; the first water return structure 120 and the housing body 111 may also be made of plastic, and at this time, the first water return structure 120 and the housing body 111 may be integrally formed by injection molding, sintering, mold pressing, etc.

In some other embodiments, as shown in fig. 23 and 24, the shell body 111 may include a peripheral frame 1113 and a top plate 1112, the top plate 1112 is connected to an end of Zhou Xiangkuang 1113 facing away from the sealing plate 112, the peripheral frame 1113 is in sealing connection with the top plate 1112, and the two may be a split assembly structure, and the first water return structure 120 may be split assembled or integrally formed on an inner wall surface of the top plate 1112. It will be appreciated that the coiled tube heat exchanger 10 is different in structure according to the use environment and requirements, for example, the heat exchange assembly 200 may be a water collecting assembly 100 without the first water return structure 120, or may be a water collecting assembly 100 with the first water return structure 120, in the water collecting assembly 100 with the first water return structure 120, the first water return structure 120 may also be different, the shell body 111 is configured to be a structure in which the Zhou Xiangkuang 1113 and the top plate 1112 are separately assembled, the peripheral frame 1113 may be used as a standard component, and may be commonly used in different first water return structures 120, so that the Zhou Xiangkuang 1113 may be produced in a batch and automated manner, with high production efficiency and low cost.

In other embodiments, as shown in fig. 25 and 26, the Zhou Xiangkuang 1113 of the housing body 111 and the top plate 1112 are integrally formed, and the first water return structure 120 is separately assembled to the top plate 1112. Like this, shell body 111 wholly can regard as general standard component, to different coil pipe heat exchangers 10, only need to assemble different first return water structures 120 to shell body 111 can for shell body 111 can regard as standard component to use, makes shell body 111 can automatic mass production in batches, and production efficiency is high, the cost is lower.

In this embodiment, the sealing connection between the coil 210 and the sealing plate 112 may take many forms, and several sealing schemes are described in detail below.

In some implementations, as shown in fig. 13 and 14, the sealing plate 112 may be made of a metal material, the heat exchange tube is also made of a metal material, the water inlet end 211 of the coil 210 may be welded to the first communication port 115 of the sealing plate 112, the water outlet end 212 of the coil 210 may be welded to the second communication port 116 of the sealing plate 112, specifically, a raised ring is formed at a position of the sealing plate 112 corresponding to the first communication port 115 and the second communication port 116, the inner wall surface of the raised ring is a sealing connection surface 1122, the sealing connection surface 1122 is sealed with the coil 210 by solder 1123, and a specific welding manner may be flame welding, furnace passing welding, high-frequency welding, or the like.

In some implementations, as shown in fig. 15, the sealing plate 112 is in interference fit with both the inlet end and the outlet end of the coil 210, and the inner diameter of the first communication port 115 of the sealing plate 112 (i.e., the diameter corresponding to the contact surface of the first communication port 115 and the heat exchange tube) is smaller than or equal to the inlet end of the coil 210 after expansion, and the inner diameter of the second communication port 116 of the sealing plate 112 (i.e., the diameter corresponding to the contact surface of the second communication port 116 and the heat exchange tube) is smaller than or equal to the outer diameter of the outlet end of the coil 210 after expansion, so that an interference connection is formed, and a sealing effect is achieved; in this expansion scheme, the thickness of the sealing plate 112 may be 5mm or more, the inner wall surface of the first communication port 115 and the inner wall surface of the second communication port may be provided with sealing grooves, and the sealing plate 112 may be made of metal, ceramic, glass, plastic, rubber, silica gel, or a composite material of the above materials. Coil 210 is typically a metal tube to improve heat transfer efficiency. Specifically, the sealing plate 112 forms a protruding ring at a position corresponding to the first communication port 115 and the second communication port 116, the inner wall surface of the protruding ring is a sealing connection surface 1122, and the sealing connection surface 1122 is in interference fit with the coil 210.

In some implementations, as shown in fig. 13, glue may be further applied between the inner side of the first communication port 115 of the sealing plate 112 and the outer peripheral wall of the water inlet end 211 of the coil pipe 210, glue may also be applied between the inner side of the second communication port 116 and the outer peripheral wall of the water outlet end 212 of the coil pipe 210, the coil pipe 210 may be connected to the sealing plate 112 by welding or expansion, and the glue adheres between the outer wall of the coil pipe 210 and the inner side of the communication port of the sealing plate 112 to perform a sealing function.

In some implementations, as shown in fig. 16, a sealing ring 1124, such as an O-ring, is placed between the inner side of the first communication port 115 of the sealing plate 112 and the outer peripheral wall of the water inlet end 211 of the coil 210 and between the inner side of the second communication port 116 and the outer peripheral wall of the water outlet end 212 of the coil 210, that is, the sealing ring 1124 is placed on the inner side of the contact surface between the sealing plate 112 and the outer wall of the tube of the coil 210, and after the expansion of the coil 210, the sealing ring 1124 is pressed between the outer wall of the coil 210 and the inner wall of the communication port of the sealing plate 112, so as to perform a sealing function. The seal ring 1124 may be rubber or silicone.

In some implementations, the water diversion assembly 100 further includes a gasket 130, the gasket 130 is disposed between the sealing plate 112 and the housing body 111 in a sealing manner, the gasket 130 covers the first opening 1111, the gasket 130 is provided with a plurality of through openings 134, the through openings 134 are disposed coaxially with the communication openings 118 in a one-to-one correspondence, and the coil 210 passes through the communication openings 118 and is connected with the through openings 134 in a sealing manner.

The through-hole 134 includes at least a plurality of first through-holes 131 and a plurality of second through-holes 132. Specifically, the sealing gasket 130 is provided with a plurality of first through holes 131 corresponding to the positions of the water inlet channel 101, the sealing gasket 130 is provided with a plurality of second through holes 132 corresponding to the positions of the water outlet channel 102, the plurality of first through holes 131 are arranged coaxially in one-to-one correspondence with the plurality of first through holes 115, the water inlet ends 211 of the plurality of coils 210 penetrate through the first through holes 115 in one-to-one correspondence with the first through holes 131 and are in sealing connection with the first through holes 131, the plurality of second through holes 132 are arranged coaxially in one-to-one correspondence with the plurality of second through holes 116, and the water outlet ends 212 of the plurality of coils 210 uniformly penetrate through the second through holes 116 in one-to-one correspondence with the second through holes 116 and are in sealing connection with the second through holes 116.

Wherein, the gasket 130 is made of rubber, silica gel, and the like, when assembling, a certain gap exists between the contact surfaces of the first communication port 115 of the sealing plate 112 and the water inlet end 211 of the coil pipe 210 and between the contact surfaces of the second communication port 116 of the sealing plate 112 and the water outlet end 212 of the coil pipe 210, the gasket 130 is sleeved on the water inlet end 211 and the water outlet end 212 of the coil pipe 210, when the shell body 111 is assembled with the sealing plate 112, the gasket 130 between the shell body 111 and the sealing plate 112 is pressed by fastening force between the shell body 111 and the sealing plate 112, so that part of the gasket 130 is pressed between the gap between the outer wall of the coil pipe 210 and the first communication port 115 and the second communication port 116 of the sealing plate 112 to play a sealing role, and meanwhile, the inlet end of the coil pipe 210 and the first communication port 131 of the gasket 130 can be in interference fit to play a sealing role, and the outlet end of the coil pipe 210 and the second communication port 132 of the gasket 130 can be in interference fit to play a sealing role. In this embodiment, the sealing arrangement of the inlet end and the outlet end of the plurality of coils 210 can be achieved by using one sealing pad 130, so that the operation is convenient, the assembly is convenient, and the sealing performance is good.

It should be noted that, the circumferential edge of the gasket 130 may also seal the connection air passage between the shell body 111 and the sealing plate 112, and the end surface of the circumferential edge of the gasket 130 may be provided with one or more circles of sealing grooves along the circumferential direction, when there are multiple circles of sealing grooves, each circle of sealing grooves Yan Zhi may encircle the circumferential edge of the gasket 130, and the multiple circles of sealing grooves are arranged at intervals along the thickness direction of the gasket 130, where the multiple circles of sealing grooves may play multiple circles, and may play a role in multi-layer sealing. In the case of gasket 130, coil 210 may also be connected to gasket 130 and sealing plate 112 by expansion.

Further, in the sealing gasket 130, the inner walls of the first through hole 131 and the second through hole 132 of the sealing gasket 130 may be provided with a circumferential sealing groove, and/or the inner walls of the first through hole 115 and the second through hole 116 may be provided with a circumferential sealing groove, the outer circumferential wall of the coil 210 may be provided with a sealing ring, and the sealing ring may be correspondingly disposed in the circumferential sealing groove, so as to further improve the sealing effect.

Expansion refers to the manner in which coil 210 is connected to seal plate 112 after expanding outwardly under the action of an internal gas or liquid pressure. One way to achieve the expansion connection of coil 210 may be to first assemble coil 210 to first communication port 115 and second communication port 116 (and/or first communication port 131 and second communication port 132, etc.) in the form of flat tubes, then temporarily seal the outlet end of coil 210, and fill the inlet end of coil 210 with gas, etc., to raise the pressure within coil 210, typically a metal tube, and coil 210 expands outwardly under pressure to abut against sealing plate (and/or gasket 130) to achieve the connection.

It should be noted that the various sealing schemes described above may also be used in combination to provide a better seal between the coil 210 and the seal plate 112. It should be further noted that, when the first water return structure 120 is provided, the sealing plate 112 is further provided with a third communication port 117 that is communicated with the return channel 121, the third communication port 117 is in sealing connection with a corresponding heat exchange tube (i.e. a long U-shaped tube), in the scheme of the sealing gasket 130, the sealing gasket 130 also has a third through port 133 that corresponds to the third communication port 117, and the specific sealing manner may refer to the sealing connection manner between the water inlet end 211 or the water outlet end 212 of the coil 210 and the sealing plate 112, which is not described herein. The first communication port 115 and the second communication port 116 may have the same structure, and in the case of the first communication port 131, the first communication port 115, the second communication port 116 and the first communication port 131 may have the same structure, for example, may be circular holes having equal diameters, so that it is not necessary to distinguish the first communication port 115, the second communication port 116 and the first communication port 131 when the water collecting and dividing assembly 100 is manufactured, and the processing is convenient and the efficiency is high.

In some embodiments, the water inlet connector 140 is connected to a side wall of the housing 110 away from the heat exchange assembly 200, specifically, a side wall of the housing body 111 opposite to the sealing plate 112 is provided with a water inlet through hole 1114 corresponding to the water inlet channel 101, and the water inlet connector 140 is coaxially disposed and communicated with the water inlet through hole 1114. Wherein, the water inlet connector 140 may be a tubular member, and an inner wall or an outer wall thereof may be provided with threads, so that the water inlet connector 140 and a water outlet pipe of the heat exchange water supply system may be in threaded connection, and the water inlet connector 140 may be at least partially located at an outer side of the shell body 111 and extend towards a side of the shell body 111 away from the sealing plate 112, so that the water inlet connector 140 is connected with the water outlet pipe of the heat exchange water supply system.

Alternatively, the water outlet connector 150 may be disposed on the same side wall of the housing 110 as the water inlet connector 140, for example, the water outlet connector 150 may also be connected to a side wall of the housing 110 away from the heat exchange assembly 200, specifically, a side wall of the housing body 111 opposite to the sealing plate 112 may be provided with a water outlet through hole 1115 corresponding to the water inlet channel 101, and the water outlet connector 150 and the water outlet through hole 1115 are coaxially disposed and communicated. The water outlet connector 150 may be at least partially located at the outer side of the housing body 111 and extend toward a side of the housing body 111 away from the sealing plate 112. Wherein, the water outlet connector 150 may be a tubular member, and an inner wall or an outer wall thereof may be provided with threads, so that the water outlet connector 150 may be in threaded connection with a water inlet pipe of the heat exchange water supply system, and the water outlet connector 150 may be at least partially located at an outer side of the shell body 111 and extend towards a side of the shell body 111 away from the sealing plate 112, so that the water inlet connector 140 is connected with the water inlet pipe of the heat exchange water supply system.

In this embodiment, as shown in fig. 1 and 2, the water inlet connector 140 may be disposed below the water outlet connector 150, where the arrow a indicates the flow direction of the water flow in the water diversion and collection assembly 100.

It can be understood that the water inlet connector 140 and the water outlet connector 150 are arranged on the shell body 111, so that the connection and the assembly are convenient; the water inlet connector 140 and the water outlet connector 150 are arranged on the same side wall, so that the arrangement rationality of components of the coil heat exchanger 10 is improved, the space occupied by the water inlet connector 140 and the water outlet connector 150 in different directions is reduced, and the heat exchange water supply system is connected with the water collecting and distributing assembly 100 from one direction.

It should be noted that the water inlet connector 140 and the water outlet connector 150 may also be disposed on different sidewalls of the housing body 111.

In some embodiments, as shown in fig. 1 and 2, the water inlet connector 140 and the water outlet connector 150 may be integrally formed with the housing body 111, integrally formed therewith, or integrally formed by separate assembly. In some embodiments, the water inlet connector 140 and the water outlet connector 150 and the housing body 111 are made of the same material, for example, the water inlet connector 140 and the water outlet connector 150 and the housing body 111 are made of metal materials, and the water inlet connector 140 and the water outlet connector 150 and the housing body 111 are integrally formed by powder alloy sintering or sand casting or forging or machining or the like by using the metal materials; for another example, the water inlet joint 140, the water outlet joint 150, and the case body 111 are made of ceramic, glass, or other materials, and the water inlet joint 140, the water outlet joint 150, and the case body 111 are integrally formed by sintering or other means; for another example, the water inlet connector 140, the water outlet connector 150, and the housing body 111 are made of plastic, and the water inlet connector 140, the water outlet connector 150, and the housing body 111 are integrally formed by injection molding, die pressing, 3D printing (3D printing is one of rapid prototyping techniques, also called additive manufacturing, which is a technique of constructing an object by layer-by-layer printing using an adhesive material such as powdered metal or plastic based on a digital model file). In other implementations, the water inlet connector 140 and the water outlet connector 150 and the housing body 111 are made of different materials, for example, the water inlet connector 140 and the water outlet connector 150 are made of metal materials, the housing body 111 is made of non-metal materials, and the water inlet connector 140 and the water outlet connector 150 are all nested in a through hole of the housing body 111 to be integrally formed in an injection molding, sintering, mold pressing mode, etc.

The metal material may be stainless steel, copper, or the like. The water inlet connector 140 and the water outlet connector 150 may be made of the same material, or may be made of different materials, and the water inlet connector 140 and the housing body 111, and the water outlet connector 150 and the housing body 111 may be connected in the same manner, or may be connected in different manners. Optionally, in order to improve the versatility of the water inlet connector 140 and the water outlet connector 150, in some embodiments, the water inlet connector 140 and the water outlet connector 150 are made of the same material and have the same structure, and the water inlet connector 140 and the housing body 111 and the water outlet connector 150 and the housing body 111 are connected in the same manner.

It can be appreciated that the housing body 111, the water inlet connector 140, the water outlet connector 150 and the housing body 111 are integrally formed, so that the assembly efficiency is high, the sealing connection surface 1122 is small, and the reliability of the water collecting and distributing assembly 100 is high.

In other embodiments, as shown in fig. 20 to 22, the water inlet and outlet connectors 140 and 150 and the case body 111 may be separately provided and assembled and connected. Specifically, the casing body 111 is provided with a water inlet 1114, a water inlet 101, a backflow channel 121, a water outlet 102 and a water outlet 1115, the water outlet 1115 is arranged corresponding to the water inlet 101 and is communicated with the water inlet 101, the water outlet 1115 is arranged corresponding to the water outlet 102 and is communicated with the water outlet 102, the water inlet joint 140 is in sealing connection with the water inlet 1114, a sealing connection 1116 is formed, and the water outlet joint 150 is in sealing connection with the water outlet 1115. The water inlet connector 140 may be welded, riveted, crimped or embedded in the water inlet hole 1114 to be connected with the shell body 111 in a sealing manner, or may be connected with the shell body 111 in a sealing manner by using a rubber ring, a rubber gasket seal or the like; similarly, the water outlet connector 150 may be welded, riveted, crimped or inserted into the water outlet through hole 1115 to be connected with the housing body 111 in a sealing manner, or may be connected with the housing body 111 in a sealing manner using a rubber ring, a rubber gasket, or the like.

The coiled tube heat exchanger 10 has different structures according to different use environments and requirements, for example, the heat exchange assembly 200 can be a water collecting assembly 100 without the first water return structure 120, or can be a water collecting assembly 100 with the first water return structure 120, and the first water return structure 120 can be different in the water collecting assembly 100 with the first water return structure 120. The water inlet joint 140 and the water outlet joint 150 are arranged in a form of being assembled with the shell 110 in a split mode, so that the water inlet joint 140 and the water outlet joint 150 can be used as general components, the water inlet joint 140 and the water outlet joint 150 can be used as standard components, and the water inlet joint 140 and the water outlet joint 150 are applicable to shell bodies 111 in different forms, and therefore, the water inlet joint 140 and the water outlet joint 150 can be produced in large-scale automatic batch mode, and the water inlet joint and the water outlet joint are high in efficiency and low in cost.

In some embodiments, a vent assembly 160 is provided on the water diversion assembly 100, the vent assembly 160 being configured to vent gas from the water flow path. The exhaust assembly 160 may be in communication with the water outlet passage 102, and in particular, as shown in fig. 12, the exhaust assembly 160 may be disposed on the water outlet joint 150; as shown in fig. 11, the exhaust assembly 160 may be disposed on the housing body 111, specifically, may be disposed on the top plate 1112 and corresponds to the water outlet passage 102. The vent assembly 160 may be a vent valve, the vent assembly 160 may be opened to vent gas from the water flow path, and the vent assembly 160 may be closed such that the vent assembly 160 is sealed to prevent leakage of water flow.

In some embodiments, the water diversion assembly 100 is provided with a drain assembly 170 and the vent assembly 160 is used to vent the water flow in the water flow path. The drain assembly 170 may be in communication with the water inlet channel 101, in particular, as shown in fig. 12, the drain assembly 170 may be disposed on the water outlet joint 150; as shown in fig. 11, the drain assembly 170 may be disposed on the housing body 111, specifically, may be disposed on the top plate 1112 and corresponds to the water inlet channel 101. The drain assembly 170 may be a drain valve, the drain assembly 170 may be opened to drain gas from the water flow path, and the drain assembly 170 may be closed such that the drain assembly 170 is sealed to prevent leakage of water flow.

It should be noted that the positions of the exhaust assembly 160 and the drain assembly 170 may be interchanged. In this embodiment, the exhaust assembly 160 may be disposed above the drain assembly 170. In this embodiment, by communicating the exhaust component 160 with the water outlet channel 102, compared with the form in which the exhaust component 160 is communicated with the water inlet channel 101, the exhaust effect is better, so that more gas in the heat exchange component 200 can be exhausted, and the heat exchange efficiency can be improved. The present embodiment facilitates the complete drainage of water within the heat exchange assembly 200 when the heat exchange assembly 200 is not in use by communicating the drain assembly 170 with the water inlet channel 101.

As shown in fig. 28, an embodiment of the present application further provides a heating and ventilation device, which includes a fan 20 and the coil heat exchanger 10 provided in the present application or any embodiment of the present application, where the fan 20 is disposed on one side of the coil heat exchanger 10.

Specifically, the fan 20 may be disposed on one side of the heat exchange assembly 200 along the second direction Y, and the flow direction E of the air flow formed by the fan 20 is substantially parallel to the second direction Y.

The heating and ventilation device may also include other components, such as a heat exchange water supply system, etc., and the connection of the heat exchange water supply system to the coil heat exchanger 10 may be referred to above, and will not be described again here.

The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. A coiled tube heat exchanger, comprising:

The water collecting and distributing assembly (100), wherein a water inlet channel (101) and a water outlet channel (102) which are mutually isolated are arranged in the water collecting and distributing assembly (100);

The heat exchange assembly (200) comprises a plurality of coils (210) and fins (240), each coil (210) is provided with a water inlet end (211) and a water outlet end (212), the water inlet ends (211) of the coils (210) are respectively connected with the water collecting and distributing assembly (100) and are respectively communicated with the water inlet channels (101), the water outlet ends (212) of the coils (210) are respectively connected with the water collecting and distributing assembly (100) and are respectively communicated with the water outlet channels (102), and the fins (240) are connected to the coils (210).

2. The coil heat exchanger according to claim 1, wherein the water collecting and distributing assembly (100) comprises a housing (110), a containing cavity (1117) is formed in the housing (110), the water inlet channel (101) and the water outlet channel (102) are formed in the containing cavity (1117), the housing (110) is arranged at one end of the heat exchanging assembly (200), a plurality of communication ports (118) are formed in the side wall, facing the heat exchanging assembly (200), of the housing (110) at intervals, and the coil (210) is connected to the communication ports (118) in a sealing mode and is communicated with the containing cavity (1117) through the communication ports (118).

3. The coil heat exchanger according to claim 2, wherein the plurality of communication ports (118) includes a plurality of first communication ports (115) disposed at intervals and a plurality of second communication ports (116) disposed at intervals, all of the first communication ports (115) correspond to positions of the water inlet passages (101) and communicate with the water inlet passages (101), the water inlet ends (211) of the coil (210) are sealingly connected to the first communication ports (115), all of the second communication ports (116) correspond to positions of the water outlet passages (102) and communicate with the water outlet passages (102), and the water outlet ends (212) of the coil (210) are sealingly connected to the second communication ports (116).

4. The coiled tube heat exchanger according to claim 2, wherein a first backwater structure (120) is further disposed in the casing (110), at least one coiled tube (210) of the coiled tubes (210) is a first coiled tube (220), the first coiled tube (220) comprises a first heat exchange tube (221) and a second heat exchange tube (222), the outlet of the first heat exchange tube (221) and the inlet of the second heat exchange tube (222) are both disposed towards the water collecting assembly (100), and in the same first coiled tube (220), the outlet of the first heat exchange tube (221) and the inlet of the second heat exchange tube (222) are communicated through the first backwater structure (120), so that the first heat exchange tube (221) and the second heat exchange tube (222) are communicated in series.

5. The coil heat exchanger according to claim 4, wherein the water inlet channel (101) and the water outlet channel (102) are arranged on both sides of the first water return structure (120), respectively.

6. The coil heat exchanger according to claim 5, wherein the first water return structure (120) is connected to an inner wall surface of the housing (110) and divides the receiving chamber (1117) into the water outlet passage (102) and the water inlet passage (101).

7. The coil heat exchanger according to claim 4, wherein the first water return structure (120) is provided with a return channel (121), at least two coils (210) of the plurality of coils (210) are first coils (220), and at least two first heat exchange tubes (221) are communicated with the corresponding second heat exchange tubes (222) through the same return channel (121).

8. The coil heat exchanger according to claim 4, wherein at least two first coils (220) of the plurality of coils (210) are provided, the first water return structure (120) is provided with a plurality of return channels (121), and the return channels (121) are provided in one-to-one correspondence between all the first heat exchange tubes (221) and the corresponding second heat exchange tubes (222).

9. The coiled tube heat exchanger according to claim 8, wherein the first water return structure (120) comprises a plurality of protruding blocks (122) arranged at intervals, adjacent protruding blocks (122) are connected through a partition plate (123), the protruding blocks (122) and the partition plate (123) are connected to the inner wall surface of the shell (110), and the backflow channel (121) is arranged on each protruding block (122).

10. The coil heat exchanger according to claim 8 or 9, wherein the first water return structure (120) is a unitary structure;

And/or, the first water return structure (120) and the shell (110) are of an integrated structure or a split assembly structure.

11. The coil heat exchanger according to any one of claims 2-8, wherein the housing (110) comprises a housing body (111) and a sealing plate (112), a first opening (1111) is formed on one side of the housing body (111) facing the heat exchange assembly (200), a first groove (113) and a second groove (114) are formed in the housing body (111) in a mutually isolated manner, the direction of the notch of the first groove (113) and the direction of the notch of the second groove (114) are consistent with the direction of the first opening (1111), the sealing plate (112) is sealed in the first opening (1111) and encloses with the first groove (113) to form the water inlet channel (101), encloses with the second groove (114) to form the water outlet channel (102), and all the communication ports (118) are formed in the sealing plate (112).

12. The coil heat exchanger as recited in claim 11, wherein the heat exchange assembly (200) further comprises a housing (230), the seal plate (112) being attached to an end face of the housing (230).

13. Coil heat exchanger according to claim 12, wherein one end of the housing (230) is provided with an end plate (232), the sealing plate (112) being connected to an end face of the housing (230) by means of the end plate (232).

14. Coil heat exchanger according to claim 11, characterized in that the shell body (111) is of unitary construction;

and/or the sealing plate (112) is of unitary construction.

15. The coil heat exchanger according to claim 11, wherein the water distribution assembly (100) further comprises a gasket (130), the gasket (130) being sealingly arranged between the sealing plate (112) and the shell body (111).

16. The coil heat exchanger according to claim 15, wherein the gasket (130) covers the first opening (1111), the gasket (130) is provided with a plurality of through openings (134), the through openings (134) are in one-to-one correspondence with the communication openings (118) and coaxially arranged, and the coil (210) passes through the communication openings (118) and is in sealing connection with the through openings (134).

17. The coil heat exchanger of claim 16, wherein a plurality of the coils (210) are connected to the gasket (130) and the seal plate (112) by expansion.

18. The coil heat exchanger of claim 11, wherein the water distribution assembly (100) further comprises a water inlet connector (140) and a water outlet connector (150), the water inlet connector (140) and the water outlet connector (150) are both connected to the housing body (111), the water inlet connector (140) is in communication with the water inlet channel (101), and the water outlet connector (150) is in communication with the water outlet channel (102).

19. The coil heat exchanger according to claim 18, wherein the water inlet connection (140) is of unitary construction with the shell body (111);

and/or the water outlet joint (150) and the shell body (111) are of an integrated structure.

20. The coil heat exchanger according to claim 18, wherein the water distribution assembly (100) further comprises a gas discharge assembly (160), the gas discharge assembly (160) being in communication with the water outlet channel (102), the gas discharge assembly (160) being connected to the water outlet fitting (150) and/or the housing (110);

and/or, the water collecting and distributing assembly (100) further comprises a water draining assembly (170), the water draining assembly (170) is communicated with the water inlet channel (101), and the water draining assembly (170) is connected to the water inlet joint (140) and/or the shell (110).

21. A heating and ventilation device, characterized by comprising a fan (20) and a coil heat exchanger (10) according to any of claims 1-20, said fan (20) being arranged on one side of said coil heat exchanger (10).