Self-cleaning structure of semi-displacement heat exchanger

Abstract

The utility model relates to a self-cleaning structure of a semi-displacement heat exchanger, which belongs to the field of heat exchangers and comprises a tank body, a self-cleaning mechanism is arranged on the inner wall of the right side of the tank body, a heat treatment mechanism is arranged on the upper surface of the tank body, and the self-cleaning mechanism comprises a heat exchange pipe, an inner circulating water pipe, a plurality of cleaning nozzles, a first water pump and a water supply pipe. And the heat exchange pipe is communicated with the inner wall of the right side of the tank body. According to the self-cleaning structure of the semi-displacement heat exchanger, the self-cleaning mechanism is arranged, the heat exchange pipe serves as a main heat exchange part of the heat exchanger and is used for heat exchange between a heat medium and water, and the inner circulation water pipe is located in the middle of an inner cavity of the heat exchange pipe and used for circularly cleaning fluid and helping to remove dirt in the heat exchange pipe; the cleaning nozzles are evenly distributed on the outer side of the inner circulation water pipe, the mechanical washing effect is generated through water spraying, dirt on the surface of the heat exchange pipe is further removed, the water pumping pipe and the water drainage pipe are used for pumping and discharging cleaning fluid respectively, and the cleaning process is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a self-cleaning structure of a semi-volumetric heat exchanger. Background Art

[0002] A semi-volumetric heat exchanger is a heat exchange device that combines the heat storage capacity of a volumetric heat exchanger with the characteristics of rapid heat exchange. This type of heat exchanger is usually used in hot water supply systems, such as centralized hot water systems in hotels, hospitals, schools and other buildings. The working principle of a semi-volumetric heat exchanger is based on the heat conduction technology of a shell and tube heat exchanger, involving heat transfer between two fluids of different temperatures. In a semi-volumetric heat exchanger, high-temperature fluid and low-temperature fluid enter the heat exchanger through different inlets respectively. They flow in the shell and tube and exchange heat through the heat transfer medium on the inner wall of the shell and tube. The temperature of the high-temperature fluid decreases after releasing heat, while the temperature of the low-temperature fluid increases after absorbing heat, thereby completing the heat exchange process.

[0003] As disclosed in Chinese patent announcement number (CN217844831 U), a semi-volumetric heat exchanger includes a water tank body, a heat exchange mechanism, a flow guide and stirring mechanism, a water inlet, a water outlet, a pressure relief safety valve, a sewage outlet, a bracket and a thermometer. The heat exchange mechanism is fixedly connected to the outer wall of the water tank body, the flow guide and stirring mechanism is fixedly connected to the upper surface of the water tank body, and the flow guide and stirring mechanism includes a guide plate and a motor. The utility model is provided with a heat exchange mechanism and a flow guide and stirring mechanism, and the water temperature inside the water tank body is measured by a thermometer. When the water temperature inside the water tank body is too high, the motor is turned on, and the rotating rod drives the blades to rotate to stir the water inside the water tank body, thereby accelerating the flow rate of the water and giving full play to the heat exchange effect between the heat exchange tube and the water inside the water tank body, thereby greatly improving the heat transfer coefficient and the heat transfer efficiency.

[0004] However, as in the above patent, there is still a problem of poor self-cleaning effect on the heat exchange tubes inside the heat exchanger. In the above patent, a heat exchange mechanism and a flow diversion and stirring mechanism are provided, and heat exchange treatment is performed using heat exchange tubes. The inner wall of the heat exchange tube is in contact with the hot water for a long time, and dirt is deposited on the inner wall. If self-cleaning treatment is not performed, the tube wall will be thickened over a long period of time, affecting the heat exchange efficiency. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a self-cleaning structure for a semi-volumetric heat exchanger, which has the advantages of good self-cleaning effect, etc., and solves the problem of poor self-cleaning effect on the heat exchange tubes inside the heat exchanger in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-cleaning structure of a semi-volumetric heat exchanger, comprising a tank body, a self-cleaning mechanism is provided on the right inner wall of the tank body, and a heat treatment mechanism is provided on the upper surface of the tank body;

[0007] The self-cleaning mechanism includes a heat exchange tube, an internal circulation water pipe, a plurality of cleaning nozzles, a first water pump and a water supply pipe. The heat exchange tube is connected to the right inner wall of the tank body, the internal circulation water pipe is connected to the right inner wall of the tank body and is located in the middle of the inner cavity of the heat exchange tube, and the plurality of cleaning nozzles are connected to the outside of the internal circulation water pipe. The first water pump is fixed to the upper surface of the tank body, one end of the water supply pipe is connected to the water outlet end of the first water pump, and the other end of the water supply pipe is connected to the internal circulation water pipe.

[0008] Furthermore, a controller is fixed on the upper surface of the tank body, and the shape of the heat exchange tube is U-shaped.

[0009] Furthermore, a plurality of the cleaning nozzles are evenly distributed along the length direction of the inner circulation water pipe.

[0010] Furthermore, the water inlet end of the first water pump is connected to a water pumping pipe, and the bottom end of the internal circulation water pipe is connected to a drainage pipe.

[0011] Furthermore, the heat treatment mechanism includes a heating water tank, an electric heating wire, a second water pump, a water inlet pipe and a water injection pipe. The heating water tank is fixed to the upper surface of the tank body, the electric heating wire is fixed between the upper and lower inner walls of the heating water tank, the second water pump is fixed to the upper surface of the heating water tank, the water inlet pipe is connected to the water inlet end of the second water pump, one end of the water injection pipe is connected to the water outlet end of the second water pump, and the other end of the water injection pipe passes through and extends to the interior of the tank body and is connected to the outside of the water supply pipe.

[0012] Furthermore, the upper surface of the heating water tank is connected to a water supply pipe, and the shape of the heating wire is S-shaped.

[0013] Furthermore, the bottom end of the water inlet pipe passes through and extends to the inner bottom wall of the heating water tank.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. The self-cleaning structure of the semi-volumetric heat exchanger is provided with a self-cleaning mechanism. The heat exchange tube is the main heat exchange part of the heat exchanger, which is used for heat exchange between the heat medium and water. The inner circulation water pipe is located in the middle of the inner cavity of the heat exchange tube, which is used to circulate the cleaning fluid to help remove the dirt in the heat exchange tube. The cleaning nozzles are evenly distributed on the outside of the inner circulation water pipe, and the mechanical flushing effect is generated by spraying water to further remove the dirt on the surface of the heat exchange tube. The suction pipe and the drain pipe are used to extract and discharge the cleaning fluid respectively to complete the cleaning process.

[0016] 2. The self-cleaning structure of the semi-volumetric heat exchanger is provided with a heat treatment mechanism. The heating water tank is used to store the heating medium, and the electric heating wire is used to heat the medium in the water tank. The heat treatment mechanism first heats the medium in the heating water tank through the electric heating wire, and then sends the heat medium into the tank body through the second water pump and the water injection pipe, and sprays it to the inner wall of the heat exchange tube through the internal circulation water pipe and the cleaning nozzle to heat-treat and soften the dirt on the inner wall of the tube body. After the heat treatment, the circulating water flow driven by the first water pump through the self-cleaning mechanism, combined with the mechanical flushing action of the cleaning nozzle, effectively removes the dirt in the heat exchange tube and maintains the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the self-cleaning mechanism of the utility model;

[0019] Figure 3 This is a schematic diagram of the heat treatment mechanism of the utility model;

[0020] Figure 4 It is a partial schematic diagram of the heat treatment mechanism of the utility model.

[0021] In the figure: 1 tank body, 2 self-cleaning mechanism, 21 heat exchange tube, 22 internal circulation water pipe, 23 cleaning nozzle, 24 first water pump, 25 water supply pipe, 26 water extraction pipe, 27 drainage pipe, 3 heat treatment mechanism, 31 heating water tank, 32 electric heating wire, 33 second water pump, 34 water inlet pipe, 35 water injection pipe, 36 water adding pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 A self-cleaning structure of a semi-volumetric heat exchanger in this embodiment includes a tank body 1, a self-cleaning mechanism 2 is provided on the right inner wall of the tank body 1, and a heat treatment mechanism 3 is provided on the upper surface of the tank body 1.

[0024] See also Figure 2In order to perform self-cleaning on the heat exchanger, the self-cleaning mechanism 2 in this embodiment includes a heat exchange tube 21, an inner circulation water tube 22, a plurality of cleaning nozzles 23, a first water pump 24 and a water supply pipe 25. The heat exchange tube 21 is connected to the right inner wall of the tank body 1. The heat exchange tube 21 is the main heat exchange part of the heat exchanger and is used for heat exchange between the heat medium and water. The inner circulation water tube 22 is connected to the right inner wall of the tank body 1 and is located in the middle of the inner cavity of the heat exchange tube 21. The inner circulation water tube 22 is located in the inner cavity of the heat exchange tube 21. The middle part is used for circulating cleaning fluid to help remove dirt in the heat exchange tube 21. Several cleaning nozzles 23 are connected to the outside of the inner circulation water pipe 22. The first water pump 24 is fixed to the upper surface of the tank body 1. The cleaning nozzles 23 are evenly distributed on the outside of the inner circulation water pipe 22. Mechanical scouring is generated by spraying water to further remove dirt on the inner wall of the heat exchange tube 21. One end of the water supply pipe 25 is connected to the water outlet end of the first water pump 24, and the other end of the water supply pipe 25 is connected to the inner circulation water pipe 22.

[0025] In this embodiment, a controller is fixed on the upper surface of the tank body 1, the shape of the heat exchange tube 21 is U-shaped, and a number of cleaning nozzles 23 are evenly distributed along the length direction of the inner circulation water pipe 22. The water inlet end of the first water pump 24 is connected to a pumping pipe 26, and the bottom end of the inner circulation water pipe 22 is connected to a drain pipe 27. The first water pump 24 provides power for the inner circulation water pipe 22, pumps the cleaning fluid into the inner circulation water pipe 22, and then sprays it out through the cleaning nozzle 23. The water supply pipe 25 connects the first water pump 24 and the inner circulation water pipe 22 to ensure that the cleaning fluid can circulate. The pumping pipe 26 and the drain pipe 27 are used to extract and discharge the cleaning fluid respectively to complete the cleaning process.

[0026] See also Figure 3-4 In order to perform heat treatment to soften the dirt in the heat exchanger for cleaning, the heat treatment mechanism 3 in this embodiment includes a heating water tank 31, a heating wire 32, a second water pump 33, a water inlet pipe 34 and a water injection pipe 35. The heating water tank 31 is fixed to the upper surface of the tank body 1, and the heating wire 32 is fixed between the upper and lower inner walls of the heating water tank 31. The heating water tank 31 is used to store the heating medium, and the heating wire 32 is used to heat the medium in the water tank 31. The S-shaped design helps to increase the heating area and improve the heating efficiency. The second water pump 33 and the heating water tank 31 are fixed to the upper surface of the tank body 1, and the heating wire 32 is fixed between the upper and lower inner walls of the heating water tank 31. The upper surface is fixed, the water inlet pipe 34 is connected to the water inlet end of the second water pump 33, one end of the water injection pipe 35 is connected to the water outlet end of the second water pump 33, and the other end of the water injection pipe 35 passes through and extends to the interior of the tank body 1 and is connected to the outside of the water supply pipe 25. The heat treatment mechanism 3 first heats the medium in the heating water tank 31 through the electric heating wire 32, and then sends the heat medium into the tank body 1 through the second water pump 33, and then sprays it to the inner wall of the heat exchange tube 21 through the internal circulation water pipe 22 and the cleaning nozzle 23, so as to heat-treat and soften the dirt on the inner wall of the tube body.

[0027] In this embodiment, the upper surface of the heating water tank 31 is connected to a water supply pipe 36, the shape of the electric heating wire 32 is S-shaped, and the bottom end of the water inlet pipe 34 passes through and extends to the inner bottom wall of the heating water tank 31. After heat treatment, the circulating water flow driven by the first water pump 24 through the self-cleaning mechanism 2, combined with the mechanical flushing action of the cleaning nozzle 23, effectively removes the dirt in the heat exchange tube 21 and maintains the heat exchange efficiency.

[0028] The working principle of the above embodiment is:

[0029] (1) When the heat exchanger is used for self-cleaning, the heat exchange tube 21 is the main heat exchange part of the heat exchanger, used for heat exchange between the heat medium and water. The inner circulation water pipe 22 is located in the middle of the inner cavity of the heat exchange tube 21, used for circulating the cleaning fluid to help remove the dirt in the heat exchange tube 21. The cleaning nozzles 23 are evenly distributed on the outer side of the inner circulation water pipe 22, and the mechanical flushing effect is generated by spraying water to further remove the dirt on the inner wall of the heat exchange tube 21. The first water pump 24 provides power for the inner circulation water pipe 22, pumps the cleaning fluid into the inner circulation water pipe 22, and then sprays it out through the cleaning nozzle 23. The water supply pipe 25 connects the first water pump 24 and the inner circulation water pipe 22 to ensure that the cleaning fluid can circulate. The water extraction pipe 26 and the drainage pipe 27 are used to extract and discharge the cleaning fluid respectively to complete the cleaning process.

[0030] (2) When performing heat treatment to soften dirt and clean the heat exchanger, the heating water tank 31 is used to store the heating medium, and the heating wire 32 is used to heat the medium in the water tank 31. The S-shaped design helps to increase the heating area and improve the heating efficiency. The heat treatment mechanism 3 first heats the medium in the heating water tank 31 through the heating wire 32, and then sends the heat medium into the tank body 1 through the second water pump 33, and then sprays it to the inner wall of the heat exchange tube 21 through the internal circulation water pipe 22 and the cleaning nozzle 23 to heat treat and soften the dirt on the inner wall of the tube body. After the heat treatment, the circulating water flow driven by the first water pump 24 through the self-cleaning mechanism 2, combined with the mechanical flushing action of the cleaning nozzle 23, effectively removes the dirt in the heat exchange tube 21 and maintains the heat exchange efficiency.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] The standard parts used in this application document can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in this field. Therefore, this application document will no longer explain the control method and circuit connection in detail.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A self-cleaning structure of a semi-volumetric heat exchanger, comprising a tank body (1), characterized in that: The right inner wall of the tank body (1) is provided with a self-cleaning mechanism (2), and the upper surface of the tank body (1) is provided with a heat treatment mechanism (3); The self-cleaning mechanism (2) comprises a heat exchange tube (21), an inner circulation water tube (22), a plurality of cleaning nozzles (23), a first water pump (24) and a water supply pipe (25); the heat exchange tube (21) is in communication with the right inner wall of the tank body (1); the inner circulation water tube (22) is in communication with the right inner wall of the tank body (1) and is located in the middle of the inner cavity of the heat exchange tube (21); the plurality of cleaning nozzles (23) are in communication with the outer side of the inner circulation water tube (22); the first water pump (24) is fixed to the upper surface of the tank body (1); one end of the water supply pipe (25) is in communication with the water outlet end of the first water pump (24); and the other end of the water supply pipe (25) is in communication with the inner circulation water tube (22).

2. The self-cleaning structure of a semi-volumetric heat exchanger according to claim 1, characterized in that: A controller is fixed on the upper surface of the tank body (1), and the heat exchange tube (21) is in a U-shape.

3. The self-cleaning structure of a semi-volumetric heat exchanger according to claim 1, characterized in that: The plurality of cleaning nozzles (23) are evenly distributed along the length direction of the inner circulation water pipe (22).

4. The self-cleaning structure of a semi-volumetric heat exchanger according to claim 1, characterized in that: The water inlet end of the first water pump (24) is connected to a water pumping pipe (26), and the bottom end of the internal circulation water pipe (22) is connected to a drainage pipe (27).

5. The self-cleaning structure of a semi-volumetric heat exchanger according to claim 1, characterized in that: The heat treatment mechanism (3) comprises a heating water tank (31), an electric heating wire (32), a second water pump (33), a water inlet pipe (34) and a water injection pipe (35); the heating water tank (31) is fixed to the upper surface of the tank body (1); the electric heating wire (32) is fixed between the upper and lower inner walls of the heating water tank (31); the second water pump (33) is fixed to the upper surface of the heating water tank (31); the water inlet pipe (34) is connected to the water inlet end of the second water pump (33); one end of the water injection pipe (35) is connected to the water outlet end of the second water pump (33); and the other end of the water injection pipe (35) passes through and extends to the interior of the tank body (1) and is connected to the outside of the water supply pipe (25).

6. The self-cleaning structure of a semi-volumetric heat exchanger according to claim 5, characterized in that: The upper surface of the heating water tank (31) is connected to a water supply pipe (36), and the shape of the heating wire (32) is S-shaped.

7. The self-cleaning structure of a semi-volumetric heat exchanger according to claim 5, characterized in that: The bottom end of the water inlet pipe (34) penetrates and extends to the inner bottom wall of the heating water tank (31).

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