Heat exchange device and water purifier comprising same

Abstract

The utility model provides a heat exchange device and a water purifier comprising the same, and belongs to the technical field of heat exchange equipment. The heat exchange device comprises a first pipe body, a second pipe body, a heating piece, a temperature measuring piece and a controller. The second pipe body is sleeved with the first pipe body, a first flow channel is formed between the inner peripheral wall of the first pipe body and the outer peripheral wall of the second pipe body, and a second flow channel is formed in the second pipe body; the heating piece is arranged in the first flow channel or the second flow channel; the temperature measuring piece is in contact with one of the first flow channel or the second flow channel provided with the heating piece; the input end of the controller is electrically connected to the temperature measuring piece, the output end of the controller is electrically connected to the heating piece, and the controller is used for receiving a detection signal value sent by the temperature measuring piece and comparing the detection signal value with a set value so as to control on-off of the heating piece. When the controller judges that the temperature detected by the temperature measuring piece is lower than the set temperature, the controller controls the heating piece to operate, water in the first flow channel or the second flow channel is heated in time, and the water temperature in the flow channel is kept at the set temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a heat exchange device and a water purifier comprising the same. Background Art

[0002] At present, users have higher and higher demands for drinking water temperature, and more users hope to get warm water directly from the water purifier. However, when using the water purifier daily, you will always find that if the time interval from the last warm water is long, the first part of the water that flows out when the warm water is received again is always not hot. This is because the heat exchange device in the water purifier has not been running for a long time, causing the temperature of the water retained in the heat exchange device to gradually decrease. When it is used again, cold water flows out first, and higher temperature water can only flow out after the cold water inside the heat exchange device is completely released. Such defects cause users to be unable to obtain warm water in time, and the experience is poor. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defect in the prior art that a user cannot obtain warm boiled water from a water purifier in time, and to provide a heat exchange device and a water purifier comprising the same.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A heat exchange device, comprising a first tube body, a second tube body, a heating element, a temperature measuring element and a controller; wherein the second tube body is sleeved inside the first tube body, a first flow channel is formed between the inner circumferential wall of the first tube body and the outer circumferential wall of the second tube body, and a second flow channel is formed inside the second tube body; the first flow channel and the second flow channel are respectively used for the flow of fluids with different temperatures; the heating element is arranged in the first flow channel or the second flow channel to heat the fluid in the first flow channel or the second flow channel; the temperature measuring element is in contact with one of the first flow channel or the second flow channel where the heating element is arranged; the input end of the controller is electrically connected to the temperature measuring element, the output end of the controller is electrically connected to the heating element, and the controller is used to receive the detection signal value emitted by the temperature measuring element and compare it with the set value to control the switching of the heating element.

[0006] In this solution, with the second tube body as the boundary, water flows with different temperatures in the first flow channel and the second flow channel flow in opposite directions to achieve heat exchange. For example, when the water temperature in the first flow channel is higher than the water temperature in the second flow channel, the water with a higher temperature in the first flow channel becomes warm water suitable for direct drinking after heat exchange. When the time interval between the user's last warm water connection is long, resulting in a decrease in the water temperature in the first flow channel or the second flow channel connected to the warm water outlet, the temperature measuring component can send the detected temperature signal value to the controller, and the controller compares it with the set warm water temperature value. When it is determined that the detected temperature is lower than the set temperature, the controller can control the heating component set in the first flow channel or the second flow channel to operate, and heat the water in the flow channel in time, so that the water temperature in the flow channel is maintained at the set temperature, that is, the water in the flow channel is kept at a constant temperature. Therefore, no matter how long the heat exchange device in the water purifier has not been running, the warm water that the user first receives when the water purifier is activated is also warm water of the set temperature, and the temperature of the first few cups of water will not be too low, thereby improving the user experience.

[0007] Preferably, the heating element includes a shell, a resistance wire and a power plug; the shell has an opening, the resistance wire is arranged in the shell, the end of the resistance wire extends out of the opening from the shell, and the end of the resistance wire is connected to the power plug; the output end of the controller is electrically connected to the power plug.

[0008] In this solution, the housing provides isolation protection for the installation of the resistance wire, the resistance wire extends out of the opening of the housing and is connected to the power plug, when the power plug is powered, the resistance wire can convert electrical energy into heat energy to make the heating element heat up. The output end of the controller is electrically connected to the power plug to control whether the heating element or the resistance wire is running or not.

[0009] Preferably, there is a heat-conducting medium between the inner wall of the shell and the resistance wire; the heating element also includes a seal and a fastener, the seal is sealed and connected to the opening, the fastener is connected to the shell, and the seal is pressed between the fastener and the opening.

[0010] In this solution, the heat conducting medium is used to insulately transfer the heat energy generated by the resistance wire to the shell, so that the shell heats up and heats the water flow. The seal is sealed and connected to the opening to prevent leakage of the heat conducting medium or reverse leakage. The fastener is connected to the shell, and the seal is pressed between the fastener and the opening to prevent the seal from falling off, further enhancing the sealing effect.

[0011] Preferably, the first tube body is provided with at least one mounting hole; the heating element is disposed in the first flow channel, and the heating element extends from the first flow channel out of the mounting hole.

[0012] In this solution, since the heating element needs to be connected to an external heat source or power source, the heating element needs to be extended out of the heat exchange device (or the first tube body), and the first tube body is located on the outer periphery of the second tube body. The heating element is arranged in the first flow channel, and it is only necessary to open a mounting hole on the first tube body to conveniently lead the heating element out of the first tube body, thereby reducing the manufacturing difficulty.

[0013] Preferably, one mounting hole is respectively provided at two opposite ends of the first tube body; the heating element extends along the extension direction of the first flow channel or the second flow channel, and two ends of the heating element extend out of the first tube body from the two mounting holes respectively.

[0014] In this solution, the heating element extends along the extension direction of the first flow channel or the second flow channel, and the extension length of the heating element is increased as much as possible, the contact area with the water flow is increased, and the heating efficiency is improved. The first tube body is extended from the two mounting holes at both ends of the heating element, so that when the heating element is connected to the power supply, one end is connected to the neutral wire and the other end is connected to the live wire.

[0015] Preferably, both ends of the heating element have power plugs respectively, and the output end of the controller is electrically connected to the power plugs; and / or, the outer periphery of the heating element has a shell, the shell passes through the mounting hole, and the shell is sealed and connected to the mounting hole.

[0016] In this solution, on the basis that both ends of the heating element extend out of the first tube body from the mounting hole, both ends of the heating element have power plugs, which can be conveniently connected to the power supply outside the first tube body to avoid the influence of water flow. The shell of the heating element is sealed and connected to the mounting hole to avoid water leakage from the mounting hole.

[0017] Preferably, the first tube body is connected with a first water inlet, a second water inlet, a first water outlet and a second water outlet; wherein, the first water inlet is connected with the first water outlet through the first flow channel; the number of the second tube bodies is at least two, one end of the second tube body is connected with the second water inlet, and the other end of the second tube body extends out of the first tube body from the second water outlet.

[0018] In this solution, through the above-mentioned structural form, hot water can flow in from the first water inlet, and normal temperature water can flow in from the second water inlet. After heat exchange between the first flow channel and the second flow channel, the hot water flowing in from the first water inlet is cooled to warm water, while the normal temperature water flowing in from the second water inlet is heated up and flows out from the second water outlet along the second tube body. The number of the second tube bodies is at least two, and the other end of the second tube body extends out of the first tube body from the second water outlet end, so that the heated normal temperature water can be directed to different paths as needed to participate in the circulation of the heat exchange device or be led out for use by users.

[0019] Preferably, the heat exchange device also includes a transfer tube, and one end of the second tube body extending from the second water outlet, the first water inlet, the second water inlet and one or more of the first water outlet are connected to one end of the transfer tube; the other end of the transfer tube is at least used to connect a valve.

[0020] In this solution, the adapter tube serves to extend the pipeline. When the installation position of the first pipe body is limited, the adapter tube can extend the port on the first pipe body to a suitable position. At the same time, the other end of the adapter tube can also be connected to a valve to control the flow of water.

[0021] Preferably, at least one end of the adapter tube is provided with a flange.

[0022] In this solution, the setting of the flange facilitates the smooth alignment of the adapter tube and the end of other tube bodies or devices, and facilitates the setting of a flat gasket sealing ring between the flange of the adapter tube and the end of other tube bodies or devices to achieve a sealed connection between the adapter tube and other tube bodies or devices.

[0023] A water purifier comprises the heat exchange device as described above.

[0024] The positive and progressive effects of the utility model are:

[0025] In the utility model, with the second tube body as the boundary, water flows with different temperatures in the first flow channel and the second flow channel flow in opposite directions to achieve heat exchange. For example, when the water temperature in the first flow channel is higher than the water temperature in the second flow channel, the water with a higher temperature in the first flow channel becomes warm water suitable for direct drinking after heat exchange. When the time interval between the user and the last time to receive warm water is long, resulting in a decrease in the water temperature in the first flow channel or the second flow channel connected to the warm water outlet, the temperature measuring element can send the detected temperature signal value to the controller, and the controller compares it with the set warm water temperature value. When it is determined that the detected temperature is lower than the set temperature, the controller can control the heating element set in the first flow channel or the second flow channel to operate, and heat the water in the flow channel in time, so that the water temperature in the flow channel is maintained at the set temperature, that is, the water in the flow channel is kept at a constant temperature. Therefore, no matter how long the heat exchange device in the water purifier has not been running, the warm water that the user first receives when the water purifier is activated is also warm water of the set temperature, and the phenomenon of the water temperature of the first few cups will not be too low, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of a heat exchange device according to a preferred embodiment of the utility model.

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of the heating element of the heat exchange device of the preferred embodiment of the utility model.

[0028] Figure 3 This is a schematic diagram of the exploded structure of the heating element of the heat exchange device of a preferred embodiment of the utility model.

[0029] Figure 4 This is a schematic cross-sectional structural diagram of the first tube body of the heat exchange device of a preferred embodiment of the utility model.

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the transfer tube of the heat exchange device of the preferred embodiment of the utility model.

[0031] Description of reference numerals:

[0032] The first tube body 100

[0033] Mounting holes 110

[0034] Second tube body 200

[0035] First runner 300

[0036] Second flow channel 400

[0037] Heating element 500

[0038] Housing 510

[0039] Opening 511

[0040] Resistance wire 520

[0041] Power plug 530

[0042] Seal 540

[0043] Fastener 550

[0044] Sealing piece 560

[0045] Temperature measuring device 570

[0046] First water inlet 610

[0047] Second water inlet 620

[0048] First water outlet 630

[0049] Second water outlet 640

[0050] Transfer pipe 700

[0051] Flanging 710

[0052] Valve 800 DETAILED DESCRIPTION

[0053] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0054] This embodiment provides a water purifier, which includes a heat exchange device.

[0055] like Figure 1-Figure 5 As shown, the heat exchange device includes a first tube body 100, a second tube body 200, a heating element 500, a temperature measuring element 570 and a controller; wherein the second tube body 200 is sleeved inside the first tube body 100, a first flow channel 300 is formed between the inner peripheral wall of the first tube body 100 and the outer peripheral wall of the second tube body 200, and a second flow channel 400 is formed inside the second tube body 200; the first flow channel 300 and the second flow channel 400 are respectively used for the flow of fluids with different temperatures; the heating element 500 is arranged on the first The controller is in the flow channel 300 or the second flow channel 400, so as to heat the fluid in the first flow channel 300 or the fluid in the second flow channel 400; the temperature measuring element 570 is in contact with a heating element 500 provided in the first flow channel 300 or the second flow channel 400; the input end of the controller is electrically connected to the temperature measuring element 570, and the output end of the controller is electrically connected to the heating element 500. The controller is used to receive the detection signal value emitted by the temperature measuring element 570 and compare it with the set value to control the opening and closing of the heating element 500.

[0056] With the second tube body 200 as the boundary, water flows with different temperatures in the first flow channel 300 and the second flow channel 400 flow in opposite directions to achieve heat exchange. For example, when the water temperature in the first flow channel 300 is higher than the water temperature in the second flow channel 400, the water with a higher temperature in the first flow channel 300 becomes warm boiled water suitable for direct drinking after heat exchange. When the time interval between the last time the user received warm boiled water is long and the water temperature in the first flow channel 300 or the second flow channel 400 connected to the warm boiled water outlet decreases, the temperature measuring component 570 can send the detected temperature signal value to the controller (not shown in the figure), and the controller compares it with the set warm boiled water temperature value. When it is determined that the detected temperature is lower than the set temperature, the controller can control the heating component 500 arranged in the first flow channel 300 or the second flow channel 400 to operate, and heat the water in the flow channel in time to maintain the water temperature in the flow channel at the set temperature, that is, keep the water in the flow channel at a constant temperature. Therefore, no matter how long the heat exchange device in the water purifier has not been in operation, the warm boiled water that the user first receives when activating the water purifier is also warm boiled water of the set temperature. The temperature of the first few cups of water will not be too low, thereby improving the user experience.

[0057] It can be understood that realizing linkage control between the controller and the temperature measuring element 570 and the heating element 500 belongs to the prior art, and the controller in this embodiment can be any existing controller capable of realizing the above functions.

[0058] In addition, in some other embodiments, the heating element 500 can be completely disposed inside the heat exchange device, and the connecting line can be introduced into the heat exchange device. In order to avoid setting a complex waterproof structure, in this embodiment, the first tube body 100 is provided with at least one mounting hole 110; the heating element 500 is disposed in the first flow channel 300, and the heating element 500 extends from the first flow channel 300 to the mounting hole 110.

[0059] Thus, the heating element 500 can be connected to the heat source or power supply outside the first tube 100. The first tube 100 is located at the periphery of the second tube 200. Compared with setting the heating element 500 in the second flow channel 400, setting the heating element 500 in the first flow channel 300 only requires opening the mounting hole 110 on the first tube 100 to conveniently lead the heating element 500 out of the first tube 100, thereby reducing the manufacturing difficulty.

[0060] Furthermore, in this embodiment, a mounting hole 110 is respectively opened at two opposite ends of the first tube body 100; the heating element 500 extends along the extension direction of the first flow channel 300 or the second flow channel 400, and the two ends of the heating element 500 extend out of the first tube body 100 from the two mounting holes 110 respectively.

[0061] The heating element 500 extends along the extension direction of the first flow channel 300 or the second flow channel 400, and the extension length of the heating element 500 is increased as much as possible, so as to increase the contact area with the water flow and improve the heating efficiency. The two ends of the heating element 500 extend out of the first tube body 100 from the two mounting holes 110, so that when the heating element 500 is connected to the power supply, one end is connected to the neutral line and the other end is connected to the live line.

[0062] like Figure 1 As shown, the first tube body 100 in this embodiment is in the shape of a coil, and the second tube body 200 and the heating element 500 inside are also in the shape of a coil. The temperature measuring element 570 can be formed by opening a blind hole on the first tube body 100, and the bottom of the blind hole contacts the first flow channel 300. The temperature measuring element 570 can be set in the blind hole so that the temperature measuring element 570 can measure the temperature of the fluid in the first flow channel 300.

[0063] Of course, in other embodiments, the first tube body 100 may also be provided with only one mounting hole 110, and the heating element 500 may be folded back; in addition, the extension length of the heating element 500 and the specific setting position in the first tube body 100 may be adjusted according to actual conditions; under suitable conditions, the heating element 500 may also be set in the second flow channel 400.

[0064] Specifically, Figure 2 and Figure 3As shown, the heating element 500 includes a shell 510, a resistance wire 520 and a power plug 530; the shell 510 has an opening 511, the resistance wire 520 is arranged in the shell 510, the end of the resistance wire 520 extends out of the opening 511 from the shell 510, and the end of the resistance wire 520 is connected to the power plug 530; the output end of the controller is electrically connected to the power plug 530.

[0065] The housing 510 provides isolation protection for the installation of the resistance wire 520. The resistance wire 520 extends out of the opening 511 of the housing 510 and is connected to the power plug 530. When the power plug 530 is powered, the resistance wire 520 can convert electrical energy into heat energy to heat the heating element 500. The output end of the controller is electrically connected to the power plug 530 to control whether the heating element 500 or the resistance wire 520 is running or not.

[0066] In this embodiment, based on the fact that both ends of the heating element 500 extend out of the first tube body 100 from two mounting holes 110 respectively, both ends of the heating element 500 have power plugs 530 respectively to facilitate connection with the power supply outside the first tube body 100 to avoid the influence of water flow.

[0067] Of course, in other optional embodiments, when the heating element 500 is completely disposed inside the first tube body 100, the end of the resistance wire 520 extends out of the opening 511 from the shell 510, and the end of the resistance wire 520 is connected to the power plug 530, and a waterproof device needs to be provided at the power plug 530.

[0068] Furthermore, there is a heat-conducting medium between the inner wall of the shell 510 and the resistance wire 520; the heating element 500 also includes a seal 540 and a fastener 550, the seal 540 is sealed and connected to the opening 511, the fastener 550 is connected to the shell 510, and the seal 540 is pressed between the fastener 550 and the opening 511.

[0069] The heat conducting medium is used to insulately transfer the heat energy generated by the resistance wire 520 to the housing 510, so that the housing 510 generates heat to heat the water flow. The seal 540 is sealed and connected to the opening 511 to prevent leakage of the heat conducting medium or reverse leakage. The fastener 550 is connected to the housing 510, and the seal 540 is pressed between the fastener 550 and the opening 511 to prevent the seal 540 from falling off, thereby further enhancing the sealing effect.

[0070] Specifically, the fastener 550 in this embodiment is in the shape of a boss nut, and is connected to the housing 510 by threads, and the sealing member 540 is pressed between the receiving groove of the fastener 550 and the opening 511; in addition, the end of the resistance wire 520 passes through the fastener 550, so as to facilitate the connection of the power plug 530 at the end. A sealing member 560 is further provided between the resistance wire 520 and the fastener 550 for sealing.

[0071] Further, the housing 510 penetrates the mounting hole 110, and the housing 510 is sealed and connected to the mounting hole 110. The housing 510 of the heating element 500 is sealed and connected to the mounting hole 110 to prevent water leakage from the mounting hole 110.

[0072] The heat-conducting medium may be magnesium oxide powder, insulating heat-conducting liquid or other existing heat-conducting media; the seal 540 may be made of heat-resistant rubber; the sealing member 560 may be filled with materials such as epoxy resin and silicone; in this embodiment, the mounting hole 110 and the shell 510 are welded and sealed, and in other optional implementations, sealing may also be achieved by clamping a sealing material.

[0073] like Figure 1 As shown, the first tube body 100 is connected to a first water inlet 610, a second water inlet 620, a first water outlet 630 and a second water outlet end 640; wherein, the first water inlet 610 is connected to the first water outlet 630 through a first flow channel 300; the number of the second tube bodies 200 is at least two, one end of the second tube body 200 is connected to the second water inlet 620, and the other end of the second tube body 200 extends from the second water outlet end 640 out of the first tube body 100.

[0074] Specifically, in this embodiment, hot water flows in from the first water inlet 610, and normal temperature water flows in from the second water inlet 620. After heat exchange between the first flow channel 300 and the second flow channel 400, the hot water flowing in from the first water inlet 610 is cooled to warm water, while the normal temperature water flowing in from the second water inlet 620 is heated and flows out from the second water outlet 640 along the second pipe body 200. When the temperature measuring element 570 detects that the water temperature in the first flow channel 300 drops to the set value (such as 45°C or 55°C), the controller will control the heating element 500 to heat the water in the first flow channel 300 to supplement the heat loss of heat exchange. No matter how long the heat exchange device has not been used, the first cup of water is at the set warm water temperature, and the temperature of the first cup of water will not be too low.

[0075] The number of the second tube bodies 200 is at least two, and the other end of the second tube body 200 extends from the second water outlet end 640 out of the first tube body 100, and the heated normal temperature water can be directed to different paths as needed to participate in the circulation of the heat exchange device or be led out for use by users. In this embodiment, the number of the second tube bodies 200 is two, and the second water outlet end 640 is provided with a sealing device to prevent water leakage. In other optional embodiments, the number of the second tube bodies 200 can be adjusted to other values.

[0076] Furthermore, the heat exchange device also includes a transfer tube 700, and one end of the second tube body 200 extending from the second water outlet end 640, the first water inlet 610, the second water inlet 620 and one or more of the first water outlet 630 are connected to one end of the transfer tube 700; the other end of the transfer tube 700 is at least used to connect the valve 800.

[0077] The transfer tube 700 serves to extend the pipeline. When the installation position of the first tube body 100 is limited, the transfer tube 700 can extend the port on the first tube body 100 to a suitable position. At the same time, the other end of the transfer tube 700 can also be connected to the valve 800 to control the flow of water.

[0078] In this embodiment, one end of the second pipe body 200 extending from the second water outlet end 640, the first water inlet 610, the second water inlet 620 and the first water outlet 630 are all connected to a transfer pipe 700. Among them, one end of the second pipe body 200 extending from the second water outlet end 640 and the other end of the transfer pipe 700 connected to the first water outlet 630 are connected to a valve 800; the other end of the transfer pipe 700 connected to the first water inlet 610 and the second water inlet 620 is used to connect to other circulation pipes in the heat exchange device.

[0079] Specifically, Figure 5 As shown, at least one end of the transfer tube 700 is provided with a flange 710 .

[0080] The provision of the flange 710 facilitates the smooth alignment of the transfer tube 700 with the ends of other tubes or devices, and facilitates the provision of a flat gasket seal between the flange 710 of the transfer tube 700 and the ends of other tubes or devices to achieve a sealed connection between the transfer tube 700 and other tubes or devices.

[0081] In this embodiment, both ends of the transfer tube 700 are provided with flanges 710. Taking the first water inlet 610 as an example, an external thread is provided on the outer periphery of the first water inlet 610. After a flat gasket sealing ring is provided at the flange 710 of the transfer tube 700 and the end of the first water inlet 610 (the end of the first water inlet 610 may also be provided with a flange 710), a nut is sleeved on the transfer tube 700. One end of the nut has an internal thread that matches the external thread of the first water inlet 610, and the other end of the nut has a limiting edge. When the nut and the first water inlet 610 are tightened, the limiting edge inside the nut presses the flange 710 of the transfer tube 700, thereby realizing a sealed connection between the first water inlet 610 and the transfer tube 700.

[0082] Other ports can also be sealed and connected to the transfer tube 700 in the above-mentioned manner.

[0083] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A heat exchange device, characterized in that: It includes a first tube body, a second tube body, a heating element, a temperature measuring element and a controller; The second tube body is sleeved inside the first tube body, a first flow channel is formed between the inner circumferential wall of the first tube body and the outer circumferential wall of the second tube body, and a second flow channel is formed inside the second tube body; The first flow channel and the second flow channel are respectively used for allowing fluids with different temperatures to flow; The heating element is disposed in the first flow channel or the second flow channel to heat the fluid in the first flow channel or the fluid in the second flow channel; The temperature measuring element is in contact with one of the first flow channel or the second flow channel where the heating element is disposed; The input end of the controller is electrically connected to the temperature measuring element, and the output end of the controller is electrically connected to the heating element. The controller is used to receive the detection signal value sent by the temperature measuring element and compare it with the set value to control the switching of the heating element.

2. The heat exchange device according to claim 1, characterized in that: The heating element comprises a shell, a resistance wire and a power plug; The housing has an opening, the resistance wire is arranged in the housing, the end of the resistance wire extends out of the opening from the housing, and the end of the resistance wire is connected to the power plug; The output end of the controller is electrically connected to the power plug.

3. The heat exchange device according to claim 2, characterized in that: A heat-conducting medium is provided between the inner peripheral wall of the shell and the resistance wire; The heating element further comprises a sealing element and a fastening element, wherein the sealing element is sealingly connected to the opening, the fastening element is connected to the shell, and the sealing element is pressed between the fastening element and the opening.

4. The heat exchange device according to claim 1, characterized in that: The first tube body is provided with at least one mounting hole; The heating element is disposed in the first flow channel, and the heating element extends from the first flow channel to the mounting hole.

5. The heat exchange device according to claim 4, characterized in that: The first tube body has a mounting hole at each of the two opposite ends; The heating element extends along an extending direction of the first flow channel or the second flow channel, and two ends of the heating element extend out of the first tube body from the two mounting holes respectively.

6. The heat exchange device according to claim 5, characterized in that: Both ends of the heating element are provided with power plugs, and the output end of the controller is electrically connected to the power plugs; and / or, The outer periphery of the heating element is provided with a shell, the shell passes through the mounting hole, and the shell is sealed and connected to the mounting hole.

7. The heat exchange device according to claim 1, characterized in that: The first pipe body is connected with a first water inlet, a second water inlet, a first water outlet and a second water outlet; Wherein, the first water inlet is connected to the first water outlet through the first flow channel; The number of the second tube bodies is at least two, one end of the second tube body is communicated with the second water inlet, and the other end of the second tube body extends out of the first tube body from the second water outlet.

8. The heat exchange device according to claim 7, characterized in that: The heat exchange device further includes a transfer tube, wherein one end of the second tube body extending from the second water outlet, one or more of the first water inlet, the second water inlet and the first water outlet are connected to one end of the transfer tube; The other end of the transfer tube is at least used for connecting a valve.

9. The heat exchange device according to claim 8, characterized in that: At least one end of the transfer tube is provided with a flange.

10. A water purifier, characterized in that: It comprises the heat exchange device according to any one of claims 1 to 9.

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