Heat exchanger, heat exchange assembly and heat exchange equipment

Abstract

The heat exchanger is provided with a water inlet side and a water outlet side which are oppositely arranged in the first direction, the heat exchanger is provided with a first heat exchange flow channel and a second heat exchange flow channel, and the first heat exchange flow channel extends from the water inlet side to the water outlet side in a zigzag mode; the second heat exchange flow channel surrounds the first heat exchange flow channel in the circumferential direction of the first heat exchange flow channel. From the end close to the water inlet side to the end close to the water outlet side, the distance between the first heat exchange flow channel and the water inlet side is gradually increased, and the distance between the second heat exchange flow channel and the water inlet side is gradually increased. According to the heat exchanger, hot water entering the first heat exchange flow channel and cold water entering the second heat exchange flow channel respectively flow upwards along the flow channels, so that air in the first heat exchange flow channel and the second heat exchange flow channel is fully discharged upwards, and the first heat exchange flow channel and the second heat exchange flow channel are filled with the hot water or the cold water. As the specific heat capacity of water is larger than that of air, the heat exchanger has better heat exchange efficiency.

Description

Technical Field

[0001] This application relates to the field of heat exchange technology, and in particular to a heat exchanger, heat exchange component, and heat exchange equipment. Background Technology

[0002] With social development and improved living standards, people are paying more and more attention to drinking water health. Water purifiers with integrated purification and heating functions are becoming increasingly popular. These purifiers provide people with pure water at different temperatures, thus making life more convenient.

[0003] To further meet people's diverse water needs, water purifiers with a boiling water function (referred to as boiling water machines) have emerged. Boiling water machines not only achieve the integrated purification and drinking functions of ordinary water purifiers, but they can also heat the purified water to boiling point first, and then cool it to the set temperature through a heat exchanger for user consumption. This differs from ordinary water purifiers that directly heat purified water to the set temperature, thus better aligning with the lifestyle habits of some users.

[0004] However, existing water purifiers have certain defects in their heat exchanger structure, resulting in low heat exchange efficiency. This leads to a small output of boiled water (i.e., water that has been heated to boiling and then cooled) which cannot meet the large water demand of users and results in long waiting times. This affects the user experience of water purifiers and hinders their further promotion and application. Summary of the Invention

[0005] Therefore, it is necessary to provide a heat exchanger, heat exchange component, and heat exchange equipment to address the problem that the low heat exchange efficiency of the heat exchanger leads to a small water output of the water purifier.

[0006] According to one aspect of this application, a heat exchanger is provided, the heat exchanger having an inlet side and an outlet side disposed opposite to each other in a first direction, the heat exchanger having a first heat exchange channel and a second heat exchange channel, the first heat exchange channel extending to the outlet side in a tortuous manner from the inlet side, and the second heat exchange channel surrounding the first heat exchange channel circumferentially.

[0007] Specifically, from the end closest to the water inlet side to the end closest to the water outlet side, the distance between the first heat exchange channel and the water inlet side gradually increases, and the distance between the second heat exchange channel and the water inlet side also gradually increases.

[0008] In one embodiment, the cross-sectional area of ​​the second heat exchange channel near the inlet side is smaller than the cross-sectional area of ​​the second heat exchange channel near the outlet side.

[0009] In one of the embodiments, the first heat exchange channel comprises a plurality of first straight segments and a plurality of first curved segments, the plurality of first straight segments are arranged in the first direction at intervals, and two adjacent first straight segments are communicated with each other through a first curved segment.

[0010] The second heat exchange channel comprises a plurality of second straight segments and a plurality of second curved segments, the plurality of second straight segments are arranged in the first direction at intervals, and two adjacent second straight segments are communicated with each other through a second curved segment.

[0011] In one of the embodiments, each first straight segment is inclined to extend towards the water inlet side from the water inlet end to the water outlet end.

[0012] Each second straight segment is inclined to extend towards the water inlet side from the water inlet end to the water outlet end.

[0013] In one of the embodiments, the heat exchanger comprises a heat exchange housing and a heat exchange pipe, the heat exchange pipe is accommodated in the heat exchange housing, the first heat exchange channel is formed in the heat exchange pipe, and the gap between the heat exchange housing and the heat exchange pipe forms the second heat exchange channel.

[0014] In one of the embodiments, the heat exchange housing comprises a first housing and a second housing, the first housing is provided with a first channel groove, the second housing is provided with a second channel groove, the first housing and the second housing are matched with each other, and the first channel groove and the second channel groove are correspondingly communicated to jointly form the second heat exchange channel.

[0015] In one of the embodiments, the heat exchanger further comprises a first sealing member and a second sealing member, the water inlet end and the water outlet end of the heat exchange pipe respectively extend out of the heat exchange housing, and the first sealing member and the second sealing member are respectively sleeved on the water inlet end and the water outlet end of the heat exchange pipe to seal the gap between the heat exchange pipe and the heat exchange housing.

[0016] According to one aspect of the present application, a heat exchange assembly is provided, comprising the heat exchanger, and further comprising a connecting pipe, the first heat exchange channels of all the heat exchangers are connected in series through the connecting pipe.

[0017] According to one aspect of the present application, a heat exchange device is provided, comprising the heat exchanger.

[0018] In one of the embodiments, the heat exchange device comprises a cooling loop and a hot water loop, the first heat exchange channel is used to form the hot water loop, and the second heat exchange channel is used to form the cooling water loop.

[0019] In one of the embodiments, the heat exchange device is a pure drinking machine.

[0020] When the heat exchanger is in a vertical state with the water inlet side below the water outlet side, the hot water entering the first heat exchange flow channel and the cold water entering the second heat exchange flow channel flow upwards along the flow channels, so that the air in the first heat exchange flow channel and the second heat exchange flow channel is fully discharged upwards, and then the first heat exchange flow channel and the second heat exchange flow channel are filled with hot water or cold water. Since the specific heat capacity of water is greater than that of air, water can absorb more heat than air, so the heat exchanger has better heat exchange effect, and thus has greater water outlet flow rate. On the contrary, if the air in the first heat exchange flow channel and the second heat exchange flow channel cannot be effectively discharged, the amount of water in the first heat exchange flow channel and the second heat exchange flow channel will be reduced, thereby reducing the heat exchange efficiency and water outlet flow rate of the heat exchanger. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a structural schematic view of a heat exchange assembly according to an embodiment of the present application.

[0022] Figure 2 FIG. 2 is a structural schematic view of a heat exchanger according to an embodiment of the present application.

[0023] Figure 3 FIG. 3 is a cross-sectional view of the heat exchanger shown in FIG. 2 perpendicular to the second direction. Figure 2

[0024] FIG. 4 is an exploded schematic view of the heat exchanger shown in FIG. 2. Figure 4 Figure 2 FIG. 5 is an exploded schematic view of the heat exchange assembly shown in FIG. 1.

[0025] Figure 5 Figure 1 FIG. 6 is a structural schematic view of the heat exchange assembly shown in FIG. 1.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 100, heat exchange assembly; 20, heat exchanger; 20a, water inlet side; 20b, water outlet side; 21, heat exchange housing; 21a, second heat exchange flow channel; 212, first housing; 212a, first flow channel groove; 214, second housing; 214a, second flow channel groove; 23, heat exchange pipe; 23a, first heat exchange flow channel; 25, first sealing member; 27, second sealing member; 40, connecting pipe. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in conjunction with the drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0029] ​​In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0030] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise explicitly specified and limited, if there are terms "installation", "connection", "connection", "fixation" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0032] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under the second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] It is to be noted that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it is to be understood that when a layer is referred to as being "connected", "coupled", or "adjacent" to another element, it can be directly connected, coupled, or adjacent to the other element, or intervening elements can also be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. The terminology used herein, such as "vertical", "horizontal", "upper", "lower", "left", "right", and the like, is for the purpose of illustration only and does not limit the present application.

[0034] Referring to Figure 1 , the embodiment of the present application provides a heat exchange device (not shown in the figure) comprising a heat exchange assembly 100 for adjusting the output water temperature.

[0035] The structure of the heat exchange assembly 100 of the present application will be described below with the heat exchange device as an example of a pure drinking machine with a hot water function. The embodiment is only used as an example for illustration and does not limit the technical scope of the present application. It can be understood that in other embodiments, the heat exchange device can also be other devices with a heat exchanger 20 installed, such as a coffee machine, an ice maker, etc., which are not limited herein.

[0036] Please continue to refer to Figure 1 , the heat exchange assembly 100 comprises a connecting pipe 40 and two identical heat exchangers 20, the two heat exchangers 20 are connected in series through the connecting pipe 40, and have higher heat exchange efficiency compared with one heat exchanger 20 working alone. It can be understood that the number of heat exchangers 20 in the heat exchange assembly 100 is not limited to this, in some other embodiments, the heat exchange assembly 100 only comprises one heat exchanger 20, and in another embodiment, the heat exchange assembly 100 comprises a plurality of heat exchangers 20, thereby meeting different heat exchange needs.

[0037] Please refer to Figures 2 to 4 , the heat exchanger 20 is generally in the form of a rectangular plate, the length direction of the heat exchanger 20 is defined as a first direction (i.e. the Z direction in Figure 2 , the width direction of the heat exchanger 20 is defined as a second direction (i.e. the X direction in Figure 2 , and the thickness direction of the heat exchanger 20 is defined as a third direction (i.e. the Y direction in Figure 3 , the first direction, the second direction, and the third direction intersect with each other. As a preferred embodiment, the first direction, the second direction, and the third direction are perpendicular to each other.

[0038] The heat exchanger 20 has a water inlet side 20a and a water outlet side 20b oppositely arranged in the first direction, and the heat exchanger 20 is vertically arranged during normal operation, the first direction is parallel to the direction of gravity, the water inlet side 20a is located at the bottom of the heat exchanger 20, and the water outlet side 20b is located at the top of the heat exchanger 20.

[0039] The heat exchanger 20 is provided with a first heat exchange flow channel 23a and a second heat exchange flow channel 21a. The first heat exchange flow channel 23a extends from the water inlet side 20a of the heat exchanger 20 to the water outlet side 20b of the heat exchanger 20, and is used to form a hot water circuit of the heat exchange device. The water inlet end of the first heat exchange flow channel 23a is close to the water inlet side 20a of the heat exchanger 20, and the water outlet end of the first heat exchange flow channel 23a is close to the water outlet side 20b of the heat exchanger 20. The second heat exchange flow channel 21a surrounds the first heat exchange flow channel 23a along the circumference of the first heat exchange flow channel 23a, and is used to form a cold water circuit of the heat exchange device. The water inlet end of the second heat exchange flow channel 21a is close to the water inlet side 20a of the heat exchanger 20, and the water outlet end of the second heat exchange flow channel 21a is close to the water outlet side 20b of the heat exchanger 20.

[0040] In this way, the first heat exchange flow channel 23a is used to flow the hot water to be cooled, and the second heat exchange flow channel 21a is used to flow the cold water used for cooling. The cold water in the second heat exchange flow channel 21a can absorb the heat of the hot water in the first heat exchange flow channel 23a to reduce the temperature of the hot water, so that the hot water flowing out of the second heat exchange flow channel 21a has a suitable temperature for the user to use.

[0041] Further, from one end close to the water inlet side 20a to one end close to the water outlet side 20b, the distance of the first heat exchange flow channel 23a from the water inlet side 20a gradually increases, and the distance of the second heat exchange flow channel 21a from the water inlet side 20a gradually increases.

[0042] In this way, when the heat exchanger 20 is in a vertical state in which the water inlet side 20a is below the water outlet side 20b, the hot water entering the first heat exchange flow channel 23a and the cold water in the second heat exchange flow channel 21a flow upward along the flow channels, so that the air in the first heat exchange flow channel 23a and the second heat exchange flow channel 21a is fully discharged upward, and the first heat exchange flow channel 23a and the second heat exchange flow channel 21a are filled with hot water or cold water.

[0043] Because the specific heat capacity of water is greater than the specific heat capacity of air (the specific heat capacity of water is 4.2*10³ J / (kg·K), and the specific heat capacity of air is 0.718*10³ J / (kg·K)), water can absorb more heat than air, so the heat exchanger 20 has better heat exchange effect, and thus has greater water outlet flow.

[0044] Conversely, if the air in the first heat exchange flow channel 23a and the second heat exchange flow channel 21a cannot be effectively discharged, the amount of water in the first heat exchange flow channel 23a and the second heat exchange flow channel 21a will be reduced, thereby reducing the heat exchange efficiency of the heat exchanger 20, and thus reducing the water outlet flow of the heat exchanger 20.

[0045] Please continue to refer to Figures 2 to 4In some embodiments, the cross-sectional area of the second heat exchange channel 21a near the water inlet side 20a is smaller than the cross-sectional area of the second heat exchange channel 21a near the water outlet side 20b. It can be understood that the specific value of the cross-sectional area of the second heat exchange channel 21a can be set according to specific needs, which is not limited herein.

[0046] Since the cross-sectional area of the second heat exchange channel 21a near the water inlet side 20a is smaller, it is more conducive to expelling the air in the second heat exchange channel 21a by extrusion, thereby ensuring that the entire second heat exchange channel 21a is completely filled with cold water, so that the heat of the hot water in the first heat exchange channel 23a can be more fully absorbed.

[0047] Moreover, since the cross-sectional area of the second heat exchange channel 21a near the water outlet side 20b is larger, the amount of cold water used for heat exchange is significantly increased, and under the condition that the flow rate of hot water in the first heat exchange channel 23a is the same, the cooling amplitude of the hot water can be effectively improved, providing users with water at a lower temperature. In the case where the cooling amplitude of the hot water in the first heat exchange channel 23a remains unchanged, the flow rate of the hot water can be increased, thereby further increasing the water outlet amount of the heat exchanger 20.

[0048] Please continue to refer to Figures 2 to 4 In some embodiments, the first heat exchange channel 23a includes a plurality of first straight segments and a plurality of first curved segments. The plurality of first straight segments are arranged in a first direction at intervals, and the length of each first straight segment is substantially the same. Each first straight segment extends obliquely from its water inlet end to its water outlet end in a direction approaching the water inlet side 20a, and the oblique angle of each first straight segment is substantially the same. Adjacent two first straight segments are connected to each other through a first curved segment, and each first curved segment is in a circular arc shape.

[0049] The second heat exchange channel 21a includes a plurality of second straight segments and a plurality of second curved segments. The plurality of second straight segments are arranged in the first direction at intervals, and the length of each second straight segment is substantially the same. Each second straight segment extends obliquely from its water inlet end to its water outlet end in a direction approaching the water inlet side 20a, and the oblique angle of each second straight segment is substantially the same. Adjacent two second straight segments are connected to each other through a second curved segment, and each second curved segment is in a circular arc shape.

[0050] In this way, the first heat exchange channel 23a and the second heat exchange channel 21a extend tortuously from the water inlet side 20a to the water outlet side 20b of the heat exchanger 20, and the oblique extension of the first straight segments and the second straight segments causes the water in the first heat exchange channel 23a and the second heat exchange channel 21a to flow in an upward trend, thereby facilitating the expulsion of air in the first heat exchange channel 23a and the second heat exchange channel 21a, and thereby improving the heat exchange efficiency of the heat exchanger 20.

[0051] In some embodiments, the first heat exchange channel 23a is coaxially arranged with the second heat exchange channel 21a, and the angle a between the first straight section and the second direction is 0.5°-5° (i.e., the angle between the second straight section and the second direction is also 0.5°-5°). It can be understood that the inclination angles of the first straight sections and the second straight section are not limited to this, and the inclination angles of different first straight sections (second straight sections) can be the same or different, thereby meeting different design needs.

[0052] Please continue to refer to Figures 2 to 4 In some embodiments, the heat exchanger 20 includes a heat exchange housing 21, a heat exchange pipe 23, a first sealing member 25, and a second sealing member 27. The heat exchange housing 21 is a hollow housing structure, the heat exchange pipe 23 is a tortuously extended pipe, the heat exchange pipe 23 is accommodated in the heat exchange housing 21, a first heat exchange channel 23a is formed in the heat exchange pipe 23, and a gap between the heat exchange housing 21 and the heat exchange pipe 23 forms a second heat exchange channel 21a surrounding the first heat exchange channel 23a.

[0053] Further, the water inlet end and the water outlet end of the heat exchange pipe 23 respectively extend out of a side surface of the heat exchange housing 21 along a third direction, the first sealing member 25 and the second sealing member 27 are both in a rotary body structure, the first sealing member 25 and the second sealing member 27 are respectively sleeved on the water inlet end and the water outlet end of the heat exchange pipe 23 to close the gap between the heat exchange pipe 23 and the heat exchange housing 21, thereby preventing water from flowing out of the gap between the heat exchange pipe 23 and the heat exchange housing 21.

[0054] Still further, in some embodiments, the heat exchange housing 21 includes a first housing 212 and a second housing 214. A first channel groove 212a is formed in a side surface of the first housing 212, and the first channel groove 212a tortuously extends along the length direction of the first housing 212 from one end of the first housing 212 to the other end of the first housing 212.

[0055] A second channel groove 214a is formed in a side surface of the second housing 214, and the second channel groove 214a tortuously extends along the length direction of the second housing 214 from one end of the second housing 214 to the other end of the second housing 214, and the shape of the second channel groove 214a matches the shape of the first channel groove 212a.

[0056] In this way, the first housing 212 and the second housing 214 are mutually connected in the third direction, and the first channel groove 212a and the second channel groove 214a are correspondingly communicated to jointly form the second heat exchange channel 21a.

[0057] In an embodiment, the first shell 212 and the second shell 214 are formed as a whole by hot plate welding or laser welding. It can be understood that in other embodiments, the assembly of the first shell 212 and the second shell 214 is not limited to this, and can be set as needed to meet different requirements.

[0058] As shown in FIGS. 1, 2 and 3, the first heat exchange flow channel 23a of each heat exchanger 20 in the heat exchange assembly 100 is connected in series by the connecting pipe 40. Figure 1 Figure 5 As shown in FIGS. 1, 2 and 3, the first heat exchange flow channel 23a of each heat exchanger 20 in the heat exchange assembly 100 is connected in series by the connecting pipe 40.

[0059] In this way, the hot water in the first heat exchange flow channel 23a of the upstream heat exchanger 20 is cooled by the cold water in the second heat exchange flow channel 21a of the heat exchanger 20, and then enters the first heat exchange flow channel 23a of the downstream heat exchanger 20, and the cold water in the second heat exchange flow channel 21a of the downstream heat exchanger 20 further cools the hot water in the first heat exchange flow channel 23a, so that the hot water flowing out of the heat exchange assembly 100 is cooled multiple times.

[0060] In the case that the water flow rate in the first heat exchange flow channel 23a is unchanged, the outlet water temperature of the heat exchange assembly 100 is lower. In the case that the outlet water temperature of the heat exchange assembly 100 is unchanged, the water flow rate in the first heat exchange flow channel 23a can be increased, so that the outlet water speed and the outlet water flow rate of the heat exchanger 20 are faster and larger.

[0061] Specifically, in an embodiment, the heat exchange assembly 100 includes two heat exchangers 20, the two heat exchangers 20 are arranged adjacent along the second direction, one end of the connecting pipe 40 is connected to the outlet water end of the first heat exchange flow channel 23a of one of the heat exchangers 20, and the other end of the connecting pipe 40 is connected to the inlet water end of the first heat exchange flow channel 23a of the other heat exchanger 20. In this way, the hot water to be cooled flows in the first heat exchange flow channel 23a of the two heat exchangers 20 in turn, and the cold water in the second heat exchange flow channel 21a of the two heat exchangers 20 cools the hot water in turn, so that the hot water flowing through the heat exchange assembly 100 is cooled twice, and has a lower outlet water temperature and a larger outlet water flow rate compared with one heat exchanger 20 cooling once.

[0062] It can be understood that the arrangement of the heat exchangers 20 in the heat exchange assembly 100 is not limited, and can be arranged in turn along the second direction, or arranged in turn along the first direction and the third direction, so as to meet the space design needs of different heat exchange devices.

[0063] ​The heat exchanger 20, the heat exchange assembly 100 and the heat exchange equipment effectively improve the heat exchange efficiency of the heat exchange equipment, increase the water output of the heat exchange equipment, expand the water temperature adjustment range of the heat exchange equipment, and effectively improve the use experience of the heat exchange equipment, thereby facilitating the further promotion of the heat exchange equipment with the hot water function.

[0064] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as within the scope of the present disclosure.

[0065] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A heat exchanger, characterized by, The heat exchanger has a water inlet side (20a) and a water outlet side (20b) oppositely arranged in a first direction, and is provided with a first heat exchange flow channel (23a) and a second heat exchange flow channel (21a), wherein the first heat exchange flow channel (23a) extends from the water inlet side (20a) to the water outlet side (20b) in a meandering manner, and the second heat exchange flow channel (21a) surrounds the first heat exchange flow channel (23a) in a circumferential direction of the first heat exchange flow channel (23a). From one end close to the water inlet side (20a) to one end close to the water outlet side (20b), the distance of the first heat exchange flow channel (23a) from the water inlet side (20a) gradually increases, and the distance of the second heat exchange flow channel (21a) from the water inlet side (20a) gradually increases.

2. The heat exchanger of claim 1, wherein The cross-sectional area of the part of the second heat exchange flow channel (21a) close to the water inlet side (20a) is smaller than the cross-sectional area of the part of the second heat exchange flow channel (21a) close to the water outlet side (20b).

3. The heat exchanger of claim 1, wherein The first heat exchange flow channel (23a) comprises a plurality of first straight segments and a plurality of first curved segments, the plurality of first straight segments are arranged in a spaced manner in the first direction, and two adjacent first straight segments are connected to each other by a first curved segment. The second heat exchange flow channel (21a) comprises a plurality of second straight segments and a plurality of second curved segments, the plurality of second straight segments are arranged in a spaced manner in the first direction, and two adjacent second straight segments are connected to each other by a second curved segment.

4. The heat exchanger of claim 3, wherein Each first straight segment extends in a direction close to the water inlet side (20a) from its water inlet end to water outlet end. Each second straight segment extends in a direction close to the water inlet side (20a) from its water inlet end to water outlet end.

5. The heat exchanger according to any one of claims 1 to 4, characterized in that The heat exchanger comprises a heat exchange shell (21) and a heat exchange pipe (23), the heat exchange pipe (23) is accommodated in the heat exchange shell (21), the first heat exchange flow channel (23a) is formed in the heat exchange pipe (23), and the gap between the heat exchange shell (21) and the heat exchange pipe (23) forms the second heat exchange flow channel (21a).

6. The heat exchanger of claim 5, wherein The heat exchange shell (21) comprises a first shell (212) and a second shell (214), the first shell (212) is provided with a first flow channel groove (212a), the second shell (214) is provided with a second flow channel groove (214a), the first shell (212) and the second shell (214) are matched with each other, and the first flow channel groove (212a) and the second flow channel groove (214a) are correspondingly connected in communication to jointly form the second heat exchange flow channel (21a).

7. The heat exchanger of claim 5, wherein The heat exchanger further comprises a first sealing member (25) and a second sealing member (27), the water inlet end and the water outlet end of the heat exchange pipe (23) respectively extend out of the heat exchange shell (21), the first sealing member (25) and the second sealing member (27) are respectively sleeved on the water inlet end and the water outlet end of the heat exchange pipe (23) to close the gap between the heat exchange pipe (23) and the heat exchange shell (21).

8. A heat exchange assembly, characterized by The heat exchange assembly comprises at least two heat exchangers as claimed in any one of claims 1 to 7, and further comprises a connecting pipe (40) through which the first heat exchange flow channels (23a) of all the heat exchangers are connected in series.

9. A heat exchange apparatus, characterized by, The heat exchange assembly comprises at least two heat exchangers as claimed in any one of claims 1 to 7.

10. The heat exchange apparatus according to claim 9, wherein The heat exchange equipment comprises a cooling circuit and a hot water circuit, the first heat exchange flow channels (23a) are used to form the hot water circuit, and the second heat exchange flow channels (21a) are used to form the cold water circuit.

11. The heat exchange apparatus according to claim 10, wherein The heat exchange equipment is a pure drinking machine.

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