Heat exchange device with self-cleaning function

Abstract

The invention belongs to the technical field of heat exchange devices, and discloses a heat exchange device with a self-cleaning function, which comprises a barrel-shaped accommodating cavity, a plurality of layers of heat exchange plates with circulating media and at least one decontamination assembly, the multiple layers of heat exchange plates are arranged in a surrounding mode to form a plurality of concentric cylindrical structures with different diameters with the center axis of the containing cavity as the axis, and an annular hole is formed between every two adjacent layers of heat exchange plates. The sewage inlet pipeline and the sewage discharge pipeline are respectively communicated with the lower end and the upper end of the accommodating cavity; the dirt removing assembly comprises a plurality of dirt removing pipes distributed in the radial direction of the containing cavity, and each dirt removing pipe is parallel to the center shaft and extends into the annular hole. And a plurality of water spraying holes are formed in each dirt removing pipe, and when the dirt removing pipes rotate around the center shafts in the annular holes, the water spraying holes wash the opposite faces of the two adjacent layers of heat exchange plates. The dirt removal device and the heat exchange device are integrally designed, dirt removal work can be efficiently completed without disassembly, in addition, torsional moment generated by water flow is used for pushing the dirt removal device to rotate, and an external power source is not needed.

Description

Technical Field

[0001] The invention discloses a heat exchange device with a self-cleaning function, belonging to the technical field of heat exchange devices. Background Art

[0002] Wastewater contains a large amount of usable heat energy. This part of heat can be used as the heat source of the heat pump system to greatly recover the heat energy in urban sewage and achieve energy conservation. The sewage source heat pump unit is an important component of the sewage source heat pump system. It mainly uses the characteristics of urban sewage being warm in winter and cool in summer. In winter, the heat pump device extracts the heat energy contained in urban sewage and transfers it to the building to achieve the purpose of heating; similarly, in summer, the sewage source heat pump unit can also absorb heat from the high temperature environment and release the heat into the sewage to achieve the effect of cooling.

[0003] When extracting heat energy from sewage, the sewage is often heat-exchanged with an intermediate medium through a heat exchanger, thereby extracting and utilizing the heat energy in the sewage. However, impurities and microorganisms in sewage can easily cause corrosion and scaling of the sewage source heat pump heat exchanger, which not only reduces the heat exchange effect of the heat exchanger, but also seriously affects its performance and service life.

[0004] There are many cleaning technologies and methods for heat exchanger surface dirt on the market, but most of these technologies need to be disassembled before they can be carried out. The operation process is cumbersome and inefficient, and high labor costs are required. In addition, frequent disassembly of equipment may cause further damage to the heat exchanger, thereby shortening its service life. More importantly, the current decontamination equipment and heat exchange device are often two independent devices, which increases the overall cost of the system. Summary of the invention

[0005] The purpose of this application is to provide a heat exchange device with a self-cleaning function, aiming to solve several technical problems existing in the prior art. Specifically, the heat exchange device in the prior art usually needs to be frequently disassembled for cleaning, which not only increases the complexity of operation, but also leads to poor integrity of the equipment, and the separate decontamination equipment further increases the cost. In order to overcome these shortcomings, the present invention proposes a specific solution, which is summarized as follows: A heat exchange device with a self-cleaning function, comprising: a barrel-shaped cavity, a multi-layer heat exchange plate with a circulating medium, a sewage inlet pipe, a sewage outlet pipe and at least one sewage removal component; The multi-layer heat exchange plates are arranged around the central axis of the cavity to form a plurality of concentric cylindrical structures with different diameters, and an annular gap is formed between two adjacent layers of heat exchange plates; The sewage inlet pipe and the sewage outlet pipe are respectively connected to the lower end and the upper end of the cavity; The decontamination assembly includes a plurality of decontamination pipes distributed along the radial direction of the cavity, each of which is arranged parallel to the central axis and extends into the annular pore; Each decontamination pipe is provided with a plurality of water spray holes. When the decontamination pipe rotates around the central axis in the annular pore, the water spray holes wash the opposite surfaces of two adjacent layers of heat exchange plates.

[0006] Preferably, the multiple decontamination pipes of the decontamination assembly are arranged in a tooth-like structure; The upper end of each decontamination pipe is connected to the top of the cavity and can rotate around the central axis.

[0007] Preferably, it also includes a rotating bearing assembly; The rotating bearing assembly is arranged between each decontamination pipe group and the top of the cavity, and is used to drive the decontamination pipe to rotate around the central axis in the annular pore.

[0008] Preferably, the decontamination components are in two groups; The two groups of dirt removal components are symmetrically arranged on both sides of the central axis.

[0009] Preferably, the plurality of water spray holes are evenly distributed along the extension direction of each of the decontamination pipes.

[0010] Preferably, the multiple water spray holes of each group of the decontamination components are arranged on the same half arc surface of the decontamination pipe; The water spray holes of the two groups of decontamination components are opened in opposite directions. When the water spray holes of the two groups of decontamination components spray water outward, the two groups of decontamination components are subjected to the reaction force of the sprayed water flow and rotate in the annular gap.

[0011] Preferably, the water spray holes on each decontamination pipe specifically include two rows; The two rows of water spray holes are located on the same half arc surface of the decontamination pipe; The included angle between the center lines of the two rows of water spray holes is less than 180 degrees; The decontamination pipe close to the central axis includes a row of water spray holes, and the opening directions of the water spray holes are inclined toward the heat exchange plate.

[0012] Preferably, the heat exchange plate is a pillow type heat exchange plate.

[0013] Preferably, it also includes a drain outlet; The drain port is arranged at the bottom end of the cavity.

[0014] Preferably, each layer of heat exchange plate is provided with a medium inlet and a medium outlet; The medium inlet is arranged at the upper end of the heat exchange plate, and is used to introduce the medium to be heat exchanged; The medium outlet is arranged at the lower end of the heat exchange plate and is used to discharge the medium after heat exchange.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the decontamination device and the heat exchange device of the present invention are integrated into one design, and the decontamination work can be completed efficiently without disassembly, which greatly enhances the integrity and ease of operation of the equipment. In addition, the present invention uses the torsional torque generated by the high-pressure water flow to drive the decontamination device to rotate, which does not require an external power source and reduces energy consumption, showing extremely high economy and practicality.

[0016] The present invention adopts pillow-type heat exchange plates, which not only have excellent heat transfer performance and effectively improve the heat exchange efficiency, but also have excellent anti-scaling performance, extending the service life of the equipment. By integrating high-pressure water flow descaling technology, dirt can be easily removed without relying on brushes or additional tools, simplifying the maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a heat exchange device (shell without cavity) with self-cleaning function in an embodiment of the present invention; Figure 2 Schematic diagram of the overall structure of a heat exchange device with a self-cleaning function in an embodiment of the present invention; Figure 3 This is a schematic diagram of the working principle of the heat exchange device in an embodiment of the present invention; Figure 4 for Figure 3 A schematic top view of the cross section of the middle heat exchange device II; Figure 5 It is a schematic diagram of a main view of a section of a decontamination pipe in an embodiment of the present invention; Figure 6 for Figure 5 A top view of the middle decontamination pipe; Figure 7 This is a schematic diagram of the high-pressure water flow from the decontamination pipe acting on the heat exchange plate in an embodiment of the present invention; Figure 8 It is a schematic front view of a dirt removal pipe close to the central axis in an embodiment of the present invention; Fig. 9 for Figure 8 Schematic diagram of the top view of the decontamination pipe.

[0018] In the figure: 1. Water supply pipe; 2. Rotating bearing assembly; 3. Water pump; 4. Sewage removal pipe; 5. Water spray hole; 6. Barrel body; 7. Heat exchange plate; 8. Drain port; 9. Barrel cover; 10. Sewage inlet pipe; 11. Sewage discharge pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-9 As shown, the purpose of this embodiment is to provide a heat exchange device with a self-cleaning function, including: a barrel-shaped cavity, a multi-layer heat exchange plate 7 with a circulating medium, a sewage inlet pipe 10, a sewage discharge pipe 11 and at least one sewage removal component; the multi-layer heat exchange plate 7 is arranged around the central axis of the cavity to form a plurality of concentric cylindrical structures of different diameters, and an annular gap is formed between two adjacent layers of heat exchange plates 7; the sewage inlet pipe 10 and the sewage discharge pipe 11 are respectively connected to the lower end and the upper end of the cavity; the sewage removal component includes a plurality of sewage removal pipes 4 distributed along the radial direction of the cavity, each sewage removal pipe 4 is arranged parallel to the central axis and extends into the annular gap; each sewage removal pipe 4 is provided with a plurality of water spray holes 5, and when the sewage removal pipe 4 rotates around the central axis in the annular gap, the water spray holes 5 flush the opposite surfaces of the two adjacent layers of heat exchange plates 7.

[0021] Specifically, in this embodiment, the barrel-shaped cavity includes a cylindrical barrel body 6 and a barrel cover 9, and the cavity is used to accommodate a medium for heat exchange and a heat exchange device. In this embodiment, the medium for heat exchange is specifically sewage. The lower end of the cavity is connected to the sewage inlet pipe 10 for introducing sewage to be treated, and the upper end is connected to the sewage discharge pipe 11 for discharging the treated sewage. The heat exchange device inside the cavity is specifically a multi-layer heat exchange plate 7, which is arranged around the central axis of the cavity to form a plurality of concentric cylindrical structures of different diameters, and an annular gap is formed between two adjacent layers of heat exchange plates 7.

[0022] The decontamination assembly of the present invention is the core part of the heat exchange device, which is used to efficiently remove the dirt accumulated on the heat exchange plate 7. The decontamination assembly is connected to the water supply pipe 1, and the water supply pipe 1 provides water to the decontamination assembly through the water pump 3. It should be understood that the water pump 3 is a high-pressure water pump, which provides high-pressure water flow to the decontamination assembly. When the high-pressure water flows through the water spray hole 5, it has a high kinetic energy, so it can strongly flush the heat exchange plate 7. At the same time, when the high-pressure water flows through the water spray hole 5, it can effectively remove a small amount of dirt attached to the water spray hole 5 and avoid clogging of the water spray hole 5. The decontamination assembly is composed of a plurality of decontamination pipes 4, which are evenly distributed along the radial direction of the cavity to ensure that every corner inside the heat exchange device can be fully covered. Each decontamination pipe 4 is arranged parallel to the central axis and extends into the annular pore formed by two adjacent layers of heat exchange plates 7, which effectively utilizes the space and improves the cleaning efficiency. On the surface of each decontamination pipe 4, a plurality of water spray holes 5 are designed. When the dirt removal pipe 4 rotates in the annular pore, these water spray holes 5 spray high-pressure water to powerfully flush the heat exchange plates 7 on both sides of the annular pore, thereby effectively removing dirt on the heat exchange plates 7.

[0023] In one embodiment, the dirt removal assembly is connected to a driving device, and the driving device drives the dirt removal pipe 4 in the dirt removal assembly to move around the central axis, and the movement trajectory of the dirt removal pipe 4 coincides with the annular pore.

[0024] Furthermore, each layer of the heat exchange plate 7 is provided with a medium inlet and a medium outlet; the medium inlet is provided at the upper end of the heat exchange plate 7 for introducing the medium to be heat exchanged; the medium outlet is provided at the lower end of the heat exchange plate 7 for discharging the medium after heat exchange.

[0025] Specifically, in this embodiment, medium inlets and outlets are respectively provided at the upper end and the lower end of each layer of heat exchange plates 7 for introducing circulating medium to exchange heat in sewage.

[0026] Furthermore, the multiple dirt removal pipes 4 of the dirt removal assembly are arranged in a tooth-like structure; the upper end of each dirt removal pipe 4 is connected to the top of the cavity and can rotate around the central axis.

[0027] Specifically, each set of decontamination components includes a plurality of decontamination pipes 4, which are arranged in a toothed structure, so that each set of decontamination components is an integrated structure, and can simultaneously rotate around the central axis in the annular pore under the action of a driving force. The upper end of each decontamination pipe 4 is connected to the top of the cavity, specifically connected to the water supply pipe 1 at the top of the cavity, for obtaining sufficient water.

[0028] Furthermore, it also includes a rotating bearing assembly 2; the rotating bearing assembly 2 is arranged between each group of the dirt removal pipes 4 and the top of the cavity, and is used to drive the dirt removal pipes 4 to rotate around the central axis in the annular pore.

[0029] Specifically, in order to realize the rotation of the dirt removal pipe 4, the present invention also includes a rotating bearing assembly 2. The rotating bearing assembly 2 is arranged between each group of dirt removal pipes 4 and the top of the cavity, and is used to drive the dirt removal pipe 4 to rotate around the central axis in the annular pore. This design allows the dirt removal pipe 4 to rotate automatically when necessary, so as to evenly clean various parts of the heat exchange plate 7. In this embodiment, multiple dirt removal pipes 4 are collected into a main pipe at the top of the cavity and connected to the water supply pipe 1. The rotating bearing is arranged between the main pipe and the water supply pipe 1, and is fixed on the barrel cover 9.

[0030] In a preferred embodiment, the number of dirt removal components can be expanded according to actual needs and set to 3 groups, 4 groups or more groups. When multiple groups of dirt removal components are used, each group of dirt removal components is arranged along the radial direction of the cavity. Specifically, from the radial cross-section of the cavity, these multiple groups of dirt removal components are similar to dividing the cavity cross-section into multiple equally divided fan-shaped areas. For example, if the number of dirt removal components is 3 groups, the cavity cross-section is divided into three fan-shaped areas; if the number is 4 groups, it is divided into four fan-shaped areas, and so on. Such a layout design ensures that the dirt removal components can more comprehensively cover the internal space of the heat exchange device, and multiple groups of dirt removal components further improve the cleaning effect and efficiency.

[0031] Furthermore, the plurality of water spray holes 5 are evenly distributed along the extension direction of each decontamination pipe 4 .

[0032] Specifically, Figure 7 As shown, a plurality of water spray holes 5 are evenly distributed in the extension direction of each decontamination pipe 4, ensuring that the high-pressure water flow can evenly cover every surface area of ​​the heat exchange plate 7, thereby improving the cleaning efficiency.

[0033] Furthermore, there are two groups of dirt removal components; the two groups of dirt removal components are symmetrically arranged on both sides of the central axis.

[0034] Specifically, Figure 4 As shown, in the embodiment of the present invention, the dirt removal components include two groups, and the two groups of dirt removal components are symmetrically arranged on both sides of the central axis. When observed from the radial cross-section of the cavity, the two groups of dirt removal components are exactly located on the radial diameter of the cavity.

[0035] Furthermore, the multiple water spray holes 5 of each group of dirt removal components are arranged on the same half arc surface of the dirt removal pipe 4; the water spray holes 5 of the two groups of dirt removal components are opened in opposite directions. When the water spray holes 5 of the two groups of dirt removal components spray water outward, the two groups of dirt removal components are subjected to the reaction force of the sprayed water flow and rotate in the annular gap.

[0036] Specifically, in this embodiment, two groups of decontamination components are symmetrically arranged on both sides of the central axis, and the water spray holes 5 of the two groups of decontamination pipes 4 are opened in opposite directions. This reverse water spray design utilizes the reaction force of the water flow, so that the two groups of decontamination components can rotate automatically without an additional power source. In addition, the high-pressure water flow provided by the water pump 3 makes the reverse force significant, further enhancing the power of the decontamination components to rotate automatically. This design also enhances the cleaning synergy between the two groups of decontamination components, thereby achieving an all-round cleaning effect.

[0037] Furthermore, the water spray holes 5 on each decontamination pipe 4 specifically include two rows; the two rows of water spray holes 5 are located on the same half arc surface of the decontamination pipe 4; the center line angle of the two rows of water spray holes 5 is less than 180 degrees; the decontamination pipe close to the central axis includes a row of water spray holes, and the opening direction of the water spray holes is inclined toward the heat exchange plate.

[0038] Specifically, Figure 5-6 As shown, in this embodiment, the water spray holes 5 on each decontamination pipe 4 are particularly delicately designed, specifically including two rows of water spray holes 5, which are both located on the same half arc surface of the decontamination pipe 4. It is worth noting that the centerline angle of the two rows of water spray holes 5 is less than 180 degrees, which ensures that the high-pressure water flow can be sprayed onto the heat exchange plate 7, thereby improving the cleaning efficiency, and also enables the sprayed water flow to generate a more balanced reaction force when the decontamination pipe 4 rotates, which helps the decontamination pipe 4 to maintain a stable rotation state in the annular gap. In addition, since the two decontamination pipes on both sides close to the central axis only need to flush the innermost heat exchange plate and provide a reaction force for the rotation of the decontamination pipe, the decontamination pipe close to the central axis only includes one row of water spray holes, and the opening direction of the water spray holes is oblique to the heat exchange plate.

[0039] Specifically, when the decontamination pipe 4 rotates around the central axis in the annular space, the two rows of water spray holes 5 will simultaneously spray high-pressure water flow to the heat exchange plate 7. These water flows can not only effectively remove the dirt on the surface of the heat exchange plate 7, but also the reaction force generated by the spraying will push the decontamination pipe 4 to continue to rotate. Figure 4 and Figure 6 As shown, in this embodiment, since the water spray holes 5 are located on the same half arc surface of the decontamination pipe 4, the center line angle of the two rows of water spray holes 5 is 90 degrees, so that the water spray holes 5 face the surface of the heat exchange plate 7 at an angle of 45 degrees.

[0040] Specifically, Figure 4 and Figure 8-9 As shown, the two decontamination pipes 4 of the two decontamination assemblies close to the central axis are provided with only one row of water spray holes 5, and the water spray holes 5 face the surface of the heat exchange plate 7 at a preset oblique angle, i.e., 45 degrees. In addition, since the decontamination pipes 4 close to the central axis are provided with only one row of water spray holes 5, the diameter of the decontamination pipes 4 close to the central axis is smaller than the diameter of other decontamination pipes 4 far from the central axis.

[0041] Furthermore, the heat exchange plate 7 is a pillow type heat exchange plate 7 .

[0042] Specifically, in this embodiment, a pillow-type heat exchange plate 7 is selected, which has a large heat exchange area, excellent heat transfer performance, and strong scale inhibition ability.

[0043] Furthermore, it also includes a drain port 8; the drain port 8 is arranged at the bottom end of the cavity.

[0044] In order to further optimize the performance of the equipment, a drain port 8 is provided at the bottom of the cavity. The drain port 8 can conveniently discharge dirt and cleaning water during the cleaning process, ensuring that the interior of the heat exchange device is always kept clean. At the same time, the provision of the drain port 8 also helps to quickly discharge the residual medium in the cavity when the equipment is shut down, preventing the medium from being retained in the equipment for a long time and causing corrosion or pollution.

[0045] The working process of this embodiment is as follows: In the working state, the sewage first enters the barrel 6 of the heat exchange device from the sewage inlet pipe 10 at the lower right of the device, and then flows upward through the annular pores between the multi-layer pillow-type heat exchange plates 7 in the barrel. In this process, the medium flows in from the medium inlet at the top of the heat exchange plate 7 and flows downward inside it, and fully exchanges heat with the sewage in the barrel 6. As the sewage flows back to the upper right of the barrel 6 and finally flows out, the heat it carries is effectively transferred to the medium in the heat exchange plate 7, thereby achieving heat transfer and sewage cooling.

[0046] When the heat exchange device completes its work, a certain amount of dirt will often be deposited on the surface of the heat exchange plate 7. In order to remove the dirt, the water pump 3 is started to pump tap water into the water supply pipe 1. At the same time, the multiple decontamination pipes 4 closely connected to the water supply pipe 1 are also filled with tap water. As the water pump 3 continues to work, the high-pressure water flow passes through the pre-arranged water spray holes 5 on the decontamination pipes 4 and is strongly sprayed onto the surface of each layer of the heat exchange plate 7. In this process, the high-pressure water flow not only plays a role in removing dirt, but also drives the entire decontamination assembly to rotate through the rotating bearing due to the torsional torque generated by the spray, further enhancing the dirt removal effect.

[0047] After the dirt is completely removed, turn off the water pump 3 and open the drain port 8 at the bottom of the sewage bucket. At this time, the dirt and the cleaning water are smoothly discharged from the bucket under the action of gravity, making full preparations for the next heat exchange work. The entire working process is not only efficient and highly automated, but also can ensure that the heat exchange device always maintains good heat exchange efficiency and working condition.

[0048] The decontamination device and the heat exchange device of the present invention are integrated into one design, and the decontamination work can be completed efficiently without disassembly, which greatly enhances the integrity and ease of operation of the equipment. In addition, the present invention uses the torsional torque generated by the high-pressure water flow to drive the decontamination device to rotate, which does not require an external power source and reduces energy consumption, showing extremely high economy and practicality.

[0049] The present invention adopts pillow-type heat exchange plate 7, which not only has excellent heat transfer performance and effectively improves heat exchange efficiency, but also has excellent anti-scaling performance, extending the service life of the equipment. Through the integrated high-pressure water flow descaling technology, dirt can be easily removed without relying on brushes or additional tools, simplifying the maintenance process.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A heat exchange device with self-cleaning function, characterized in that: include: A barrel-shaped cavity, a multi-layer heat exchange plate with a circulating medium, a sewage inlet pipe, a sewage outlet pipe and at least one sewage removal component; The multi-layer heat exchange plates are arranged around the central axis of the cavity to form a plurality of concentric cylindrical structures with different diameters, and an annular gap is formed between two adjacent layers of heat exchange plates; The sewage inlet pipe and the sewage outlet pipe are respectively connected to the lower end and the upper end of the cavity; The decontamination assembly includes a plurality of decontamination pipes distributed along the radial direction of the cavity, each of which is arranged parallel to the central axis and extends into the annular pore; Each decontamination pipe is provided with a plurality of water spray holes. When the decontamination pipe rotates around the central axis in the annular pore, the water spray holes wash the opposite surfaces of two adjacent layers of heat exchange plates.

2. The heat exchange device with self-cleaning function according to claim 1, characterized in that: The multiple decontamination pipes of the decontamination assembly are arranged in a tooth-like structure; The upper end of each decontamination pipe is connected to the top of the cavity and can rotate around the central axis.

3. The heat exchange device with self-cleaning function according to claim 2, characterized in that: Also included is a rotating bearing assembly; The rotating bearing assembly is arranged between each decontamination pipe group and the top of the cavity, and is used to drive the decontamination pipe to rotate around the central axis in the annular pore.

4. The heat exchange device with self-cleaning function according to claim 1, characterized in that: The decontamination components are divided into two groups; The two groups of dirt removal components are symmetrically arranged on both sides of the central axis.

5. The heat exchange device with self-cleaning function according to claim 4, characterized in that: The multiple water spray holes are evenly distributed along the extension direction of each of the dirt removal pipes.

6. The heat exchange device with self-cleaning function according to claim 5, characterized in that: The multiple water spray holes of each group of the decontamination components are arranged on the same half arc surface of the decontamination pipe; The water spray holes of the two groups of decontamination components are opened in opposite directions. When the water spray holes of the two groups of decontamination components spray water outward, the two groups of decontamination components are subjected to the reaction force of the sprayed water flow and rotate in the annular gap.

7. The heat exchange device with self-cleaning function according to claim 6, characterized in that: The water spray holes on each decontamination pipe specifically include two rows; The two rows of water spray holes are located on the same half arc surface of the decontamination pipe; The included angle between the center lines of the two rows of water spray holes is less than 180 degrees; The decontamination pipe close to the central axis includes a row of water spray holes, and the opening directions of the water spray holes are inclined toward the heat exchange plate.

8. The heat exchange device with self-cleaning function according to claim 1, characterized in that: The heat exchange plate is a pillow type heat exchange plate.

9. The heat exchange device with self-cleaning function according to claim 1, characterized in that: It also includes drains; The drain port is arranged at the bottom end of the cavity.

10. The heat exchange device with self-cleaning function according to claim 1, characterized in that: Each layer of heat exchange plate is provided with a medium inlet and a medium outlet; The medium inlet is arranged at the upper end of the heat exchange plate, and is used to introduce the medium to be heat exchanged; The medium outlet is arranged at the lower end of the heat exchange plate and is used to discharge the medium after heat exchange.

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