Double-pipe heat exchanger and water outlet device

Abstract

The utility model provides a double-pipe heat exchanger and a water outlet device, and relates to the technical field of heat exchange equipment. The first casing pipe and the second casing pipe are arranged in the shell, the second casing pipe is arranged in the first casing pipe in a sleeved mode, a gap is formed between the second casing pipe and the first casing pipe to form a first flow channel, a second flow channel is formed in the second casing pipe, and the first flow channel is communicated with the second flow channel. Heat exchange between the first flow channel and the second flow channel is suitable for being achieved through the pipe body of the second sleeve. The scheme can improve the heat exchange efficiency and reduce the size of the heat exchanger.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a shell and tube heat exchanger and a water outlet device. Background Art

[0002] The countertop water purifiers currently on the market use a heat exchanger to cool down the boiled water to obtain warm boiled water. The existing heat exchanger structure is relatively complex, and the unreasonable arrangement of the cooling water channel increases the space occupied and makes the water channel volume larger. At the same time, in order to ensure the heat exchange effect of the heat exchanger, the heat exchange area needs to be increased, which further makes the heat exchanger larger. In addition, the existing heat exchanger has an integrated flow channel, which makes the molding process more complicated and increases the production cost. On the other hand, the integrated flow channel is set in an S shape, so the internal flow channel cannot be separated from the external flow channel, which reduces the feasibility of maintenance and replacement. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a shell and tube heat exchanger to solve the problems of low heat exchange efficiency and unreasonable water path layout of the existing heat exchanger.

[0004] The utility model adopts the following scheme: the application provides a shell-type heat exchanger, including a shell, and also including a first shell and a second shell arranged in the shell, wherein the second shell is arranged in the first shell and a gap is formed between the second shell and the first shell to form a first flow channel, a second flow channel is formed inside the second shell, and the first flow channel and the second flow channel are suitable for heat exchange through the tube body of the second shell.

[0005] Furthermore, a water flow direction of the second flow channel is opposite to a water flow direction of the first flow channel.

[0006] Furthermore, the shell includes a first flow channel water inlet, a first flow channel water outlet, a second flow channel water inlet, and a second flow channel water outlet, and the first flow channel water inlet and the second flow channel water outlet are arranged at the same end, and the first flow channel water outlet and the second flow channel water inlet are arranged at the same other end.

[0007] Furthermore, the shell includes a bottom cover and an upper cover suitable for fixing the first sleeve and the second sleeve, the bottom cover is provided with a sealing member, and the first sleeve and the second sleeve are connected to the sealing member.

[0008] Furthermore, the first sleeve is connected end to end at the end through multiple sections of first connecting pipes to form a circuitous first flow channel, and the second sleeve is connected end to end at the end through multiple sections of second connecting pipes to form a circuitous second flow channel.

[0009] Furthermore, a first connecting flow channel suitable for connecting one end of adjacent first connecting pipes and a second connecting flow channel suitable for connecting one end of adjacent second connecting pipes are alternately formed at both ends of the bottom cover to form the first and second flow channels that are circuitous, respectively.

[0010] Furthermore, the upper cover includes a first cover body and a second cover body, the first cover body is connected to one end of the bottom cover to close the first connecting flow channel, and the second cover body is connected to the other end of the bottom cover to close the second connecting flow channel.

[0011] Furthermore, the first sleeve and the second sleeve are metal tubes.

[0012] The utility model also provides a water outlet device, comprising any one of the above-mentioned shell and tube heat exchangers.

[0013] Beneficial effects:

[0014] By arranging a first sleeve and a second sleeve that are sleeved with each other, heat exchange can be achieved through the tube body of the second sleeve that is sleeved inside. By arranging a metal tube with a high heat transfer coefficient in the second sleeve, the heat exchange efficiency can be effectively improved. The heat exchange is carried out in the form of a sleeve, so that the water path flows inside the sleeve, the water path layout is optimized, and the surface area of ​​the second sleeve is fully contacted, which greatly increases the surface area used for heat exchange, thereby achieving higher heat exchange efficiency with a smaller volume, which is beneficial to reducing the volume of the entire heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a shell-and-tube heat exchanger according to an embodiment of the utility model;

[0016] Figure 2 It is a schematic cross-sectional structure diagram of a shell-and-tube heat exchanger according to an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the exploded structure of a shell-and-tube heat exchanger according to an embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the exploded structure of a flow channel group of a shell-and-tube heat exchanger according to an embodiment of the utility model;

[0019] Figure numerals: first cover body 1, first flow channel water inlet 11, second flow channel water outlet 12, second cover body 2, first flow channel water outlet 21, second flow channel water inlet 22, bottom cover 3, sealing member 4, first connecting flow channel 41, second connecting flow channel 42, first sleeve 5, second sleeve 6, first flow channel 7, second flow channel 8. DETAILED DESCRIPTION

[0020] Combination Figures 1 to 4As shown, this embodiment provides a water outlet device, including a shell-and-tube heat exchanger. The shell-and-tube heat exchanger includes a shell, and also includes a first shell 5 and a second shell 6 arranged in the shell, wherein the second shell 6 is sleeved in the first shell 5 and a gap is formed between the first shell 5 to form a first flow channel 7, and a second flow channel 8 is formed inside the second shell 6, and the first flow channel 7 and the second flow channel 8 are suitable for achieving heat exchange through the tube body of the second shell 6.

[0021] In this embodiment, the water outlet device can be a device such as a water dispenser, and the sleeve heat exchanger is used to cool the hot water of the water dispenser to form warm water outflow. Specifically, the sleeve heat exchanger includes a shell, a seal 4 and a flow channel group. The shell includes an upper cover and a bottom cover 3, wherein the seal 4 is arranged between the upper cover and the bottom cover 3, and the flow channel group includes the first sleeve 5, the second sleeve 6 and the third sleeve, and the flow channel group is arranged on the seal 4 to achieve sealing between different flow channels. Here, the upper cover includes a first cover body 1 and a second cover body 2, wherein the first cover body 1 is connected to one end of the bottom cover 3 to close the first connecting flow channel 41, and the second cover body 2 is connected to the other end of the bottom cover 3 to close the second connecting flow channel 42. A space can be left between the first cover body 1 and the second cover body 2 to reduce the volume of the heat exchanger, and also to provide installation space for the heat exchanger. The first cover body 1 is provided with a first flow channel water inlet 11 communicating with the first flow channel 7, and a second flow channel water outlet 12 communicating with the second flow channel 8, and the second cover body 2 is provided with a first flow channel water outlet 21 communicating with the first flow channel 7, and a second flow channel water inlet 22 communicating with the second flow channel 8. By setting the water inlet and the water outlet in reverse, the water flow in the first flow channel 7 and the second flow channel 8 can be reversed, thereby improving the heat exchange efficiency.

[0022] Combination Figures 2 to 4As shown, in this embodiment, the first sleeve 5 is connected end to end at the end through multiple sections of the first connecting pipe to form a circuitous first flow channel 7, and the second sleeve 6 is connected end to end at the end through multiple sections of the second connecting pipe to form a circuitous second flow channel 8. Here, the first connecting pipe and the second connecting pipe are both made of metal pipes with a high heat transfer coefficient, such as copper pipes, to improve the heat exchange efficiency. Here, the diameter of the first connecting pipe is larger than that of the second connecting pipe, so that a gap is formed between the first connecting pipe and the second connecting pipe to form the first flow channel 7, and the second flow channel 8 is formed separately inside the second connecting pipe. Here, the second flow channel 8 is arranged in the first flow channel 7. When hot water is passed into the second flow channel 8, cold water can be passed into the first flow channel 7, so that the second flow channel 8 is surrounded by cold water, which greatly increases the heat exchange area, thereby improving the heat exchange efficiency. The use of straight metal pipes can facilitate production, installation and disassembly. And it can be achieved that both the first flow channel and the second flow channel are made of metal pipes, which overcomes the problem that the existing one-piece S-shaped first flow channel and the second flow channel cannot all be made of metal pipes because they cannot be installed by sleeve connection.

[0023] Combination Figure 3 to Figure 4 As shown, the sealing member 4 can be set to a rubber material, which is used to fix the first connecting pipe and the second connecting pipe. The first connecting flow channel 41 suitable for connecting one end of the adjacent first connecting pipe and the second connecting flow channel 42 suitable for connecting one end of the adjacent second connecting pipe are staggered at the two ends of the bottom cover 3 to form the first flow channel 7 and the second flow channel 8 respectively. That is, the adjacent first connecting pipes here are connected through the first connecting flow channel 41, and the first connecting flow channels 41 at both ends are staggered. Taking two adjacent first connecting pipes as an example, one end of the first connecting pipe is connected to the same end of the adjacent second connecting pipe through the first connecting flow channel 41, and the other end of the second connecting pipe is connected to the same end of the other connecting pipe through another first connecting flow channel 41 on the opposite side, thereby forming a first flow channel 7 adjacent to each other, and the second flow channel 8 is similarly arranged. Here, the first connecting pipe is shorter than the second connecting pipe, so that the first connecting flow channel 41 and the second connecting flow channel 42 can be arranged in sequence from the inside to the outside, optimizing the space layout in the shell and facilitating installation. Here, connecting pipes of different lengths can be used to connect connecting pipes of different lengths at different positions, which has a simple structure and is conducive to reducing the space at the connection position.

[0024] During operation, hot water is introduced into the second flow channel 8 and cold water is introduced into the first flow channel 7, so that the temperature in the second flow channel 8 can be quickly reduced. Of course, when heating up, cold water can be introduced into the second flow channel 8 and hot water can be introduced into the first flow channel 7, so that the temperature in the second flow channel 8 can be quickly increased. Through the design of this solution, the heat exchange efficiency can be greatly improved in the limited space of the plate shell, and high heat exchange efficiency can be achieved without a large volume, which is conducive to reducing the volume of the heat exchanger.

[0025] It should be understood that the above are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0026] The above description of the drawings used in the implementation manner only shows certain embodiments of the utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

Claims

1. A shell and tube heat exchanger, comprising a shell, characterized in that: It also includes a first sleeve and a second sleeve arranged in the shell, wherein the second sleeve is sleeved in the first sleeve and a gap is formed between the second sleeve and the first sleeve to form a first flow channel, a second flow channel is formed inside the second sleeve, and the first flow channel and the second flow channel are suitable for heat exchange through the tube body of the second sleeve.

2. The double-tube heat exchanger according to claim 1, characterized in that: The water flow direction of the second flow channel is opposite to the water flow direction of the first flow channel.

3. The shell and tube heat exchanger according to claim 1, characterized in that: The shell includes a first flow channel water inlet, a first flow channel water outlet, a second flow channel water inlet, and a second flow channel water outlet, and the first flow channel water inlet and the second flow channel water outlet are arranged at the same end, and the first flow channel water outlet and the second flow channel water inlet are arranged at the same other end.

4. The double-tube heat exchanger according to claim 1, characterized in that: The housing comprises a bottom cover and an upper cover suitable for fixing the first sleeve and the second sleeve. A sealing member is arranged on the bottom cover, and the first sleeve and the second sleeve are connected to the sealing member.

5. The double-tube heat exchanger according to claim 4, characterized in that: The first sleeve is connected end to end through multiple sections of first connecting pipes to form a circuitous first flow channel, and the second sleeve is connected end to end through multiple sections of second connecting pipes to form a circuitous second flow channel.

6. The double-tube heat exchanger according to claim 5, characterized in that: A first connecting flow channel suitable for connecting one end of adjacent first connecting pipes and a second connecting flow channel suitable for connecting one end of adjacent second connecting pipes are staggeredly formed at both ends of the bottom cover to form the first and second flow channels respectively.

7. The double-tube heat exchanger according to claim 6, characterized in that: The upper cover includes a first cover body and a second cover body. The first cover body is connected to one end of the bottom cover to close the first connecting flow channel. The second cover body is connected to the other end of the bottom cover to close the second connecting flow channel.

8. The double-tube heat exchanger according to claim 7, characterized in that: The first cover body is provided with a first flow channel water inlet communicating with the first flow channel, and a second flow channel water outlet communicating with the second flow channel, and the second cover body is provided with a first flow channel water outlet communicating with the first flow channel, and a second flow channel water inlet communicating with the second flow channel.

9. The shell and tube heat exchanger according to any one of claims 1 to 8, characterized in that: The first sleeve and the second sleeve are metal pipes.

10. A water outlet device, characterized in that: A shell and tube heat exchanger comprising any one of claims 1 to 9.

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