Heat exchanger

Abstract

The invention relates to the technical field of heat exchange medium cleaning, and discloses a heat exchanger which comprises a heat exchanger body, a cleaning assembly and a driving assembly, the heat exchanger body comprises a shell and a plurality of heat exchange plates, a mounting space is formed in the shell, and the heat exchange plates are sequentially arranged at intervals in the first direction and fixedly arranged in the mounting space; the heat exchange plate is arranged in the mounting space to divide the mounting space into multiple first heat exchange cavities and multiple second heat exchange cavities, the multiple first heat exchange cavities are suitable for conducting heat exchange with the multiple second heat exchange cavities, the cleaning assembly comprises a scraper, the scraper is movably arranged on the side wall of the heat exchange plate, the driving assembly is in transmission connection with the scraper, and the driving assembly is suitable for driving the scraper to move relative to the heat exchange plate. And the side wall of the heat exchange plate is cleaned by the scraping plate. Therefore, self-cleaning of the heat exchange plate can be achieved under the condition that the heat exchanger is not disassembled, the cleaning mode is simple and reliable, and the cleaning cost of dirt in the heat exchanger is greatly reduced.

Description

Technical Field

[0001] This application relates to the technical field of heat exchange medium cleaning, and particularly to a heat exchanger. Background Art

[0002] A heat exchanger is a heat exchange device that utilizes cold fluid medium and hot fluid medium for heat exchange.

[0003] Currently, when the cold and hot media exchange heat inside the heat exchanger, the fluid medium with a relatively high viscosity easily adheres to the side walls of the heat exchange plates inside the heat exchanger, resulting in the formation of dirt on the side walls of the heat exchange plates. The formation of dirt not only easily causes blockage, but also affects the efficiency of the internal fluid medium during heat exchange, increasing the heat exchange energy consumption.

[0004] In the related art, in order to remove the dirt inside the heat exchanger, the heat exchanger needs to be regularly disassembled and overhauled. However, regular overhaul consumes a large amount of manpower and material resources, and the disassembly and assembly process is relatively complex, thus greatly increasing the operation and maintenance costs. Summary of the Invention

[0005] This application provides a heat exchanger, which solves the problem that the dirt on the side walls of the heat exchange plates inside the heat exchanger is not easy to clean, can achieve self-cleaning of the heat exchange plates without disassembling the heat exchanger, and the cleaning method is simple and reliable, greatly reducing the cleaning cost of the dirt inside the heat exchanger.

[0006] The main technical solutions adopted in this application include: In a first aspect, an embodiment of this application provides a heat exchanger, including: A heat exchanger body, which includes a housing and a plurality of heat exchange plates. The housing forms an installation space, and the plurality of heat exchange plates are arranged at intervals in a first direction and fixed in the installation space to divide the installation space into a plurality of first heat exchange chambers and a plurality of second heat exchange chambers. The plurality of first heat exchange chambers are adapted to exchange heat with the plurality of second heat exchange chambers; A cleaning assembly, which includes a scraper. The scraper is movably arranged on the side wall of the heat exchange plate; A driving assembly, which is in transmission connection with the scraper. The driving assembly is adapted to drive the scraper to move relative to the heat exchange plate so that the scraper cleans the side wall of the heat exchange plate.

[0007] Optionally, the driving assembly includes: a mounting bracket and a driving member. The mounting bracket is fixedly installed outside the heat exchanger body, the driving member is fixed on the mounting bracket, the driving member is in transmission connection with the scraper, and the driving member is adapted to drive the scraper to move relative to the heat exchange plate.

[0008] Optionally, the driving member includes a first driving motor and a second driving motor. The output end of the first driving motor is provided with a first rotating shaft, and the output end of the second driving motor is provided with a second rotating shaft. The first rotating shaft and the second rotating shaft are oppositely arranged along the second direction and are respectively located on both sides of the heat exchange plate. The cleaning assembly further includes a first traction wire and a second traction wire. Along the second direction, one end of the first traction wire is fixedly connected to the scraping plate, and the other end of the first traction wire is wound around the first rotating shaft. Along the second direction, one end of the second traction wire is fixedly connected to the scraping plate, and the other end of the second traction wire is wound around the second rotating shaft. The second direction is perpendicular to the first direction.

[0009] Optionally, along the second direction, the heat exchange plate has a first end and a second end. A part of the first rotating shaft is arranged inside the heat exchanger body. Along the second direction, the first rotating shaft located inside the heat exchanger body is arranged on the same side as the first end and is spaced apart from the first end. A part of the second rotating shaft is arranged inside the heat exchanger body. Along the second direction, the second rotating shaft located inside the heat exchanger body is arranged on the same side as the second end and is spaced apart from the second end.

[0010] Optionally, there are multiple first driving motors and multiple second driving motors, and the multiple first driving motors correspond to the multiple second driving motors one by one.

[0011] Optionally, a guide rail extending along the second direction is provided on the side wall of the heat exchange plate. The scraping plate is arranged on the guide rail, and the scraping plate is movable relative to the guide rail along the second direction.

[0012] Optionally, the housing has a first opening and a second opening communicating with the installation space. Along the first direction, the two heat exchange plates at both ends among the multiple heat exchange plates are respectively a first plate and a second plate. The first plate is connected to the housing and is used to block the first opening, and the second plate is connected to the housing and is used to block the second opening.

[0013] Optionally, the multiple first heat exchange chambers and the multiple second heat exchange chambers are alternately arranged in sequence.

[0014] Optionally, the heat exchanger body has a cold fluid inlet, a cold fluid outlet, a hot fluid inlet, and a hot fluid outlet; The cold fluid inlet and the cold fluid outlet are both communicated with each first heat exchange chamber, and the hot fluid inlet and the hot fluid outlet are both communicated with each second heat exchange chamber. Among them, the scraping plate is arranged in the first heat exchange chamber.

[0015] Optionally, along the first direction, at least one of the two heat exchange chambers at both ends among the multiple first heat exchange chambers is located on the outermost side of the heat exchanger body.

[0016] Optionally, a sensor is further arranged inside the heat exchanger body. The sensor is used to obtain the dirt thickness on the side wall of the heat exchange plate, and the driving assembly is configured to drive the scraping plate to clean the side wall of the heat exchange plate according to the dirt thickness.

[0017] According to the heat exchanger provided by the embodiments of the present application, a scraper is provided on the side wall of the heat exchange plate. When the driving assembly drives the scraper to move relative to the heat exchange plate, the side wall of the heat exchange plate is cleaned by the scraper. Thus, self-cleaning of the heat exchange plate can be achieved without disassembling the heat exchanger, and the cleaning method is simple and reliable, greatly reducing the cleaning cost of the dirt inside the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is an assembly drawing of the heat exchanger provided by an embodiment of the present application; Figure 2 It is an assembly schematic diagram of the heat exchanger body, the cleaning assembly and the driving assembly provided by an embodiment of the present application; Figure 3 It is an assembly schematic diagram of the scraper and the heat exchange plate provided by an embodiment of the present application; Figure 4 It is a partially enlarged assembly drawing of the scraper and the heat exchange plate provided by an embodiment of the present application; Figure 5 It is a schematic diagram of the first heat exchange chamber and the second heat exchange chamber provided by an embodiment of the present application.

[0020]

DESCRIPTION OF THE REFERENCE NUMERALS

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of this application.

[0022] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

[0023] Referring to "embodiments" in this application means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase does not necessarily refer to the same embodiment when it appears in various positions in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments.

[0024] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0026] The "multiple" mentioned in this application refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0027] A heat exchanger is a heat exchange device that uses cold fluid media and hot fluid media to exchange heat.

[0028] At present, when cold and hot media are exchanging heat inside the heat exchanger, the fluid medium with higher viscosity can easily adhere to the side walls of the heat exchange plates inside the heat exchanger, causing dirt to form on the side walls of the heat exchange plates. The formation of dirt not only easily causes blockage, but also affects the efficiency of heat exchange of the internal fluid medium and increases the heat exchange energy consumption.

[0029] In the related art, in order to remove the dirt inside the heat exchanger, the heat exchanger needs to be disassembled and repaired regularly. However, regular maintenance consumes a lot of manpower and material resources, and the disassembly and assembly process is relatively complicated, which greatly increases the operation and maintenance costs.

[0030] Based on this, the present application proposes a heat exchanger 100, which is provided with a scraper 21 on the side wall of the heat exchange plate 12. When the driving component 3 drives the scraper 21 to move relative to the heat exchange plate 12, the side wall of the heat exchange plate 12 is cleaned by the scraper 21. Thus, the heat exchange plate 12 can be self-cleaned without disassembling the heat exchanger 100, and the cleaning method is simple and reliable, which greatly reduces the cleaning cost of dirt inside the heat exchanger 100.

[0031] The heat exchanger 100 proposed in the embodiment of the present application is described below with reference to the accompanying drawings.

[0032] like Figures 1-5 As shown, the heat exchanger 100 according to the first embodiment of the present application includes: a heat exchanger body 1, a cleaning component 2 and a driving component 3.

[0033] The heat exchanger body 1 includes a shell 11 and a plurality of heat exchange plates 12. The shell 11 forms an installation space. The plurality of heat exchange plates 12 are arranged in sequence along a first direction X and fixed in the installation space to divide the installation space into a plurality of first heat exchange chambers 13 and a plurality of second heat exchange chambers 14. The plurality of first heat exchange chambers 13 are suitable for heat exchange with the plurality of second heat exchange chambers 14. The cleaning component 2 includes a scraper 21. The scraper 21 is movably arranged on the side wall of the heat exchange plate 12. The driving component 3 is transmission-connected to the scraper 21. The driving component 3 is suitable for driving the scraper 21 to move relative to the heat exchange plate 12 so that the scraper 21 cleans the side wall of the heat exchange plate 12.

[0034] Specifically, the heat exchanger 100 can be configured as, but not limited to, a plate heat exchanger 100. The heat exchanger body 1 includes a housing 11. An installation space is formed inside the housing 11. A plurality of heat exchange plates 12 are fixedly installed in the installation space, and along the first direction X, the plurality of heat exchange plates 12 are sequentially arranged at intervals to divide the installation space into a plurality of first heat exchange chambers 13 and a plurality of second heat exchange chambers 14. It can be understood that the first direction X can be the width direction of the heat exchanger body 1. A first heat exchange chamber 13 or a second heat exchange chamber 14 can be formed between two adjacent heat exchange plates 12. Among them, the first heat exchange chamber 13 and the second heat exchange chamber 14 do not communicate with each other, and heat exchange fluids at different temperatures flow in the first heat exchange chamber 13 and the second heat exchange chamber 14 respectively. At the same time, at least one of the plurality of first heat exchange chambers 13 is adjacent to at least one of the plurality of second heat exchange chambers 14, so as to ensure that the adjacent first heat exchange chamber 13 and second heat exchange chamber 14 can perform heat exchange through the heat exchange plate 12 to meet the heat exchange function of the heat exchanger 100.

[0035] In some embodiments of the present application, the same first heat exchange fluid flows in the plurality of first heat exchange chambers 13. For example, the plurality of first heat exchange chambers 13 can be directly connected to the first heat exchange fluid inlet and outlet respectively, so as to supply the first heat exchange fluid to the plurality of first heat exchange chambers 13 through the first heat exchange fluid inlet respectively, and discharge the first heat exchange fluid after heat exchange in the plurality of first heat exchange chambers 13 through the first heat exchange fluid outlet respectively. Or, the plurality of first heat exchange chambers 13 can also be connected in sequence to form a first heat exchange flow path, and the first heat exchange flow path is connected to the first heat exchange fluid inlet and outlet. In this way, the first heat exchange fluid can sequentially enter the plurality of first heat exchange chambers 13 through the first heat exchange fluid inlet, and when the first heat exchange fluid completes heat exchange in the first heat exchange flow path, it is discharged from the first heat exchange fluid outlet.

[0036] Similarly, the same second heat exchange fluid flows in the plurality of second heat exchange chambers 14. For example, the plurality of second heat exchange chambers 14 can be directly connected to the second heat exchange fluid inlet and outlet respectively, so as to supply the second heat exchange fluid to the plurality of second heat exchange chambers 14 through the second heat exchange fluid inlet respectively, and discharge the second heat exchange fluid after heat exchange in the plurality of second heat exchange chambers 14 through the second heat exchange fluid outlet respectively. Or, the plurality of second heat exchange chambers 14 can also be connected in sequence to form a second heat exchange flow path, and the second heat exchange flow path is connected to the second heat exchange fluid inlet and outlet. In this way, the second heat exchange fluid can sequentially enter the plurality of second heat exchange chambers 14 through the second heat exchange fluid inlet 17, and when the second heat exchange fluid completes heat exchange in the second heat exchange flow path, it is discharged from the second heat exchange fluid outlet 18. It can be understood that in order to meet the heat exchange requirements, the first heat exchange flow path and the second heat exchange flow path do not communicate with each other, and the temperature of the first heat exchange fluid is different from the temperature of the second heat exchange fluid.

[0037] When the first heat exchange fluid and the second heat exchange fluid in the heat exchanger body 1 are heat exchanged through the heat exchange plate 12, if the viscosity of the heat exchange fluid is high, the cohesion and adhesion between its molecules are significantly enhanced, resulting in a larger surface tension of the heat exchange fluid. This physical property makes it easy for the heat exchange fluid to adhere to the side wall surface of the heat exchange plate 12 during the flow process, and as the heat exchange continues, the attachments gradually accumulate and form a dirt layer. It should be noted that the generation of dirt will cause a double negative effect: on the one hand, at the geometric level, it will cause the cross-sectional area of ​​the heat exchange cavity flow channel to shrink, thereby increasing the flow resistance and possibly causing blockage; on the other hand, at the thermodynamic level, it will significantly reduce the heat transfer efficiency of the heat exchange plate 12, so that the system needs to consume more energy to maintain the established heat exchange requirements, thereby causing the overall energy efficiency of the heat exchanger 100 to decrease and shortening the service life of the equipment.

[0038] Based on this, the heat exchanger 100 in the present application is also provided with a cleaning component 2, such as Figures 2-4 As shown, the cleaning assembly 2 includes a scraper 21, which is movably disposed on the side wall of the heat exchange plate 12, wherein the size of the scraper 21 matches the size of the heat exchange plate 12, and can ensure that the dirt on the side wall of the heat exchange plate 12 can be removed.

[0039] For example, the heat exchange plate 12 is Figure 2 Taking the placement direction shown as an example, the scraper 21 is arranged inside the heat exchanger body 1, and a scraper 21 is provided in each first heat exchange cavity 13 and / or each second heat exchange cavity 14, and the length of the scraper 21 matches the width of the heat exchange plate 12. In order to ensure the cleaning function of the scraper 21, the scraper 21 and the side wall of the heat exchange plate 12 abut against each other, and the scraper 21 can move up and down along the second direction Y (height direction) relative to the side wall of the heat exchange plate 12.

[0040] Furthermore, the heat exchanger 100 is also provided with a drive assembly 3, which can be arranged inside the heat exchanger body 1 or outside the heat exchanger body 1. The drive assembly 3 is connected to the scraper 21 in a transmission manner. It can be understood that the drive assembly 3 can be directly connected to the scraper 21 in a transmission manner, or can be indirectly connected to the scraper 21 through other intermediate components.

[0041] The driving assembly 3 can drive the scraper 21 to move relative to the heat exchange plate 12, and the heat exchange plate 12 continues to move in accordance with Figure 2Taking the shown placement direction as an example for illustration, when the driving component 3 drives the scraping plate 21 to move up and down along the height direction relative to the side wall of the heat exchange plate 12, since the scraping plate 21 is in contact with the side wall of the heat exchange plate 12, during the movement of the scraping plate 21, the dirt accumulated on the side wall of the heat exchange plate 12 can be cleaned, and the cleaned dirt can be discharged along with the flow of the heat exchange fluid. In this way, by cleaning the side wall of the heat exchange plate 12, the flow resistance and the thermal resistance can be reduced, the heat transfer coefficient can be increased, and the heat exchange efficiency can be improved. At the same time, during the entire cleaning process, the scraping plate 21 always works inside the heat exchanger body 1. Therefore, the heat exchange plate 12 can be self-cleaned without disassembling the heat exchanger 100, and the cleaning method using the scraping plate 21 is simple and reliable, greatly reducing the cleaning cost of the dirt inside the heat exchanger 100.

[0042] It should be noted that the driving component 3 can drive the scraping plate 21 to clean the dirt when the heat exchanger body 1 is working or when the heat exchanger body 1 is not working, that is, the dirt cleaning under the condition of all-time and uninterrupted operation of the heat exchanger 100 can be realized, the cleaning efficiency can be improved, and the influence on the operation of the heat exchanger 100 can be minimized.

[0043] In summary, for the heat exchanger 100 proposed according to the first aspect embodiment of the present application, the heat exchanger 100 is provided with a scraping plate 21 on the side wall of the heat exchange plate 12. When the driving component 3 drives the scraping plate 21 to move relative to the heat exchange plate 12, the side wall of the heat exchange plate 12 is cleaned by the scraping plate 21. Thus, the self-cleaning of the heat exchange plate 12 can be realized without disassembling the heat exchanger 100, and the cleaning method is simple and reliable, greatly reducing the cleaning cost of the dirt inside the heat exchanger 100.

[0044] In some embodiments of the present application, a plurality of scraping plates 21 can be arranged on the same side wall of the heat exchange plate 12. Among them, the plurality of scraping plates 21 are arranged in sequence along the movable direction of the scraping plate 21 (such as the second direction Y). The driving component 3 is in transmission connection with each scraping plate 21, and each scraping plate 21 is in contact with the corresponding side wall of the heat exchange plate 12. In this way, the driving component 3 can drive a plurality of scraping plates 21 to clean the side wall of the heat exchange plate 12 at the same time, which is beneficial to improving the cleaning efficiency.

[0045] In some embodiments of the present application, a silicon carbide / polytetrafluoroethylene composite coating can be coated on the surface of the scraping plate 21. The coating can reduce the friction coefficient when the scraping plate 21 is in contact with the heat exchange plate 12, and can improve the corrosion resistance of the scraping plate 21, especially suitable for high-viscosity heat exchange fluids.

[0046] In some embodiments of the present application, the abutting area between the scraping plate 21 and the side wall of the heat exchange plate 12 can be made of an elastic material. This arrangement can improve the abutting effect between the heat exchange plate 12 and the scraping plate 21, thereby facilitating the cleaning effect of the scraping plate 21 on dirt.

[0047] In some embodiments of the present application, a shape memory alloy (such as nickel-titanium alloy) can be used as the base material of the scraping plate 21. When the temperature of the heat exchange fluid exceeds the threshold value, the shape memory alloy can finely adjust the shape of the scraping plate 21, so that the scraping plate 21 can better fit the side wall of the heat exchange plate 12, which is beneficial to further improving the cleaning efficiency.

[0048] In some embodiments of the present application, such as Figure 1 and Figure 2 As shown, the driving assembly 3 includes: a mounting bracket 31 and a driving member 32. The mounting bracket 31 is fixedly installed on the outside of the heat exchanger body 1, the driving member 32 is fixed on the mounting bracket 31, the driving member 32 is in transmission connection with the scraping plate 21, and the driving member 32 is adapted to drive the scraping plate 21 to move relative to the heat exchange plate 12.

[0049] Specifically, the mounting bracket 31 is fixedly installed on the outside of the heat exchanger body 1. That is to say, the mounting bracket 31 does not contact the heat exchanger body 1. The driving member 32 is fixedly installed on the mounting bracket 31. The fixed installation method includes but is not limited to bolt connection and fixation. The driving member 32 is in transmission connection with the scraping plate 21. It can be understood that the driving member 32 can be directly in transmission connection with the scraping plate 21, or indirectly in transmission connection with the scraping plate 21 through other intermediate components. Among them, the driving member 32 can be selected but is not limited to a driving motor, a driving cylinder, a hydraulic cylinder, etc. The driving member 32 is used to drive the scraping plate 21 to move relative to the heat exchange plate 12, so that the scraping plate 21 can clean the dirt accumulated on the side wall of the heat exchange plate 12 during the movement.

[0050] In some embodiments of the present application, when the driving member 32 is indirectly in transmission connection with the scraping plate 21 through other intermediate components, it ensures the separate arrangement of the driving member 32 and the heat exchanger body 1, avoiding a greater impact on the performance of the driving member 32 caused by the heat transfer of the heat exchanger body 1.

[0051] In some embodiments of the present application, such as Figures 2-4As shown, the driving member 32 includes a first driving motor 321 and a second driving motor 322. The output end of the first driving motor 321 is provided with a first rotating shaft 3211, and the output end of the second driving motor 322 is provided with a second rotating shaft 3221. The first rotating shaft 3211 and the second rotating shaft 3221 are arranged oppositely along the second direction Y and are respectively located on both sides of the heat exchange plate 12. The second direction Y can be the height direction of the heat exchanger body 1. The cleaning assembly 2 further includes a first traction wire 22 and a second traction wire 23. Along the second direction Y, one end of the first traction wire 22 is fixedly connected to the scraper 21, and the other end of the first traction wire 22 is wound around the first rotating shaft 3211. Along the second direction Y, one end of the second traction wire 23 is fixedly connected to the scraper 21, and the other end of the second traction wire 23 is wound around the second rotating shaft 3221. The second direction Y is perpendicular to the first direction X.

[0052] Specifically, as Figure 2 shown, the driving member 32 is composed of a first driving motor 321 and a second driving motor 322. The first driving motor 321 and the second driving motor 322 can be, but are not limited to, servo motors, stepper motors, etc. Among them, the output end (rotating shaft) of the first driving motor 321 is fixedly connected to the first rotating shaft 3211 through a coupling, and the first driving motor 321 is used to drive the first rotating shaft 3211 to rotate. Similarly, the output end (rotating shaft) of the second driving motor 322 is fixedly connected to the second rotating shaft 3221 through a coupling, and the second driving motor 322 is used to drive the second rotating shaft 3221 to rotate.

[0053] Furthermore, along the second direction Y, the first rotating shaft 3211 and the second rotating shaft 3221 are arranged oppositely and are respectively located on both sides of the heat exchange plate 12. It can be understood that the extending direction of the first rotating shaft 3211 and the extending direction of the second rotating shaft 3221 are parallel to the first direction X, and the extending length of the first rotating shaft 3211 and the extending length of the second rotating shaft 3221 match the size of the heat exchanger body 1 in the first direction X.

[0054] Furthermore, the cleaning assembly 2 further includes a first traction wire 22 and a second traction wire 23. It can be understood that when there are multiple scrapers 21 in the heat exchanger body 1, each scraper 21 is correspondingly provided with a first traction wire 22 and a second traction wire 23, as Figure 3As shown, taking the example that there are two scraping plates 21 in the first heat exchange chamber 13, the two scraping plates 21 are respectively arranged on the side walls of the heat exchange plates 12 on both sides. Among them, the first traction wire 22 is arranged above the corresponding scraping plate 21. One end of the first traction wire 22 is fixedly connected to the corresponding scraping plate 21, and the other end of the first traction wire 22 is wound around the first rotating shaft 3211. When the first rotating shaft 3211 rotates, the first rotating shaft 3211 can wind or unwind the first traction wire 22. The second traction wire 23 is arranged above the corresponding scraping plate 21. One end of the second traction wire 23 is fixedly connected to the corresponding scraping plate 21, and the other end of the second traction wire 23 is wound around the second rotating shaft 3221. When the second rotating shaft 3221 rotates, the second rotating shaft 3221 can wind or unwind the second traction wire 23.

[0055] For example, continue to refer to Figure 3 As shown, assume that the initial position of the scraping plate 21 is close to the lower position of the side wall of the heat exchange plate 12. When it is necessary to clean the side wall of the heat exchange plate 12, the first driving motor 321 drives the first rotating shaft 3211 to rotate. Driven by the first rotating shaft 3211, the two first traction wires 22 corresponding to the two scraping plates 21 are both wound around the first rotating shaft 3211. At the same time, the second driving motor 322 drives the second rotating shaft 3221 to rotate. The rotation direction of the second rotating shaft 3221 is opposite to that of the first rotating shaft 3211, so that the two second traction wires 23 corresponding to the two scraping plates 21 leave the second rotating shaft 3221. In this way, under the cooperation of the first driving motor 321 and the second driving motor 322, the lengths of the two first traction wires 22 between the first rotating shaft 3211 and the corresponding scraping plates 21 gradually decrease, and the lengths of the two second traction wires 23 between the second rotating shaft 3221 and the corresponding scraping plates 21 gradually increase. Under the pulling action of the two first traction wires 22, the two scraping plates 21 respectively move upward along the second direction Y relative to the side walls of the heat exchange plates 12 corresponding to them. And during the movement of the scraping plates 21, the two scraping plates 21 respectively clean and scrape the dirt on the side walls of the heat exchange plates 12 corresponding to them. That is, by the cooperation of one first driving motor 321 and one second driving motor 322, the driving of multiple scraping plates 21 can be realized, and the driving efficiency is relatively high, which is beneficial to improving the cleaning efficiency.

[0056] After the scraper 21 moves to a predetermined position, for example, when the scraper 21 moves to a position above the side wall close to the heat exchange plate 12, the second drive motor 322 drives the second rotating shaft 3221 to rotate. Driven by the second rotating shaft 3221, the two second traction lines 23 corresponding to the two scrapers 21 are both wound around the second rotating shaft 3221. At the same time, the first drive motor 321 drives the first rotating shaft 3211 to rotate. The rotating directions of the second rotating shaft 3221 and the first rotating shaft 3211 are opposite, so that the two first traction lines 22 corresponding to the two scrapers 21 leave the first rotating shaft 3211. In this way, with the cooperation of the first drive motor 321 and the second drive motor 322, the lengths of the two second traction lines 23 between the second rotating shaft 3221 and the corresponding scrapers 21 are gradually reduced, and the lengths of the two first traction lines 22 between the first rotating shaft 3211 and the corresponding scrapers 21 are gradually increased. Under the pulling action of the two second traction lines 23, the two scrapers 21 move downward along the second direction Y relative to the side walls of the respective corresponding heat exchange plates 12. And during the movement of the scraper 21, the two scrapers 21 respectively clean the dirt on the side walls of the respective corresponding heat exchange plates 12 for a second time. At the same time, the two scrapers 21 can also be reset to the initial position under the drive of the first drive motor 321 and the second drive motor 322.

[0057] Thus, through the combined use of the first drive motor 321, the second drive motor 322, the first traction line 22, and the second traction line 23, the reciprocating movement of the scraper 21 in the second direction Y is realized, which is convenient for the scraper 21 to clean the dirt on the side wall of the heat exchange plate 12. The driving method is simple and reliable, and the driving efficiency is relatively high, which is beneficial to improving the cleaning efficiency.

[0058] In some embodiments of the present application, pressure sensors are installed at different positions of the scraper 21. When the resistance of the scraper 21 to the dirt is too large, the torque of the first drive motor 321 or the second drive motor 322 can be adjusted to increase the scraping force of the scraper 21 on the dirt, thereby improving the cleaning effect.

[0059] In some embodiments of the present application, such as Figure 1 and Figure 2 As shown, along the second direction Y, the heat exchange plate 12 has a first end 121 and a second end 122. A part of the first rotating shaft 3211 is arranged inside the heat exchanger body 1. Along the second direction Y, the first rotating shaft 3211 located inside the heat exchanger body 1 is arranged on the same side as the first end 121 and is spaced apart from the first end 121. A part of the second rotating shaft 3221 is arranged inside the heat exchanger body 1. Along the second direction Y, the second rotating shaft 3221 located inside the heat exchanger body 1 is arranged on the same side as the second end 122 and is spaced apart from the second end 122.

[0060] Specifically, a part of the first rotating shaft 3211 is located inside the heat exchanger body 1. It can be understood that a first rotating shaft space is provided inside the heat exchanger body 1, and a part of the first rotating shaft 3211 is arranged in the first rotating shaft space. The part of the first rotating shaft 3211 located outside the first rotating shaft space is connected to the first driving motor 321. Among them, the first rotating shaft space is arranged on the same side as the first end 121, and along the second direction Y, the first rotating shaft space is separated from the installation space by a first partition. It can be understood that the first traction wire 22 passes through the first partition to wind around the first rotating shaft 3211. In order to prevent the heat exchange fluid from entering the first rotating shaft space, a rubber plug can be arranged at the position where the first traction wire 22 passes through the first partition.

[0061] Similarly, a part of the second rotating shaft 3221 is located inside the heat exchanger body 1. It can be understood that a second rotating shaft space is provided inside the heat exchanger body 1, and a part of the second rotating shaft 3221 is arranged in the second rotating shaft space. The part of the second rotating shaft 3221 located outside the second rotating shaft space is connected to the second driving motor 322. Among them, the second rotating shaft space is arranged on the same side as the second end 122, and along the second direction Y, the second rotating shaft space is separated from the installation space by a second partition. It can be understood that the second traction wire 23 passes through the second partition to wind around the second rotating shaft 3221. In order to prevent the heat exchange fluid from entering the second rotating shaft space, a rubber plug can be arranged at the position where the second traction wire 23 passes through the first partition.

[0062] Thus, by arranging a part of the first rotating shaft 3211 and a part of the second rotating shaft 3221 inside the heat exchanger body 1, the heat exchanger 100 can be made more compact, reducing the transmission distance between the driving member 32 and the scraper 21, thereby improving the transmission efficiency and reducing the transmission loss. In some embodiments of the present application, such as Figure 2 shown, there are multiple first driving motors 321 and multiple second driving motors 322, and the multiple first driving motors 321 and the multiple second driving motors 322 correspond to each other one by one.

[0063] Specifically, the first driving motor 321 can be arranged as multiple. For example, the number of the first driving motors 321 can be 2, 3, 4, 5. The second driving motor 322 can be arranged as multiple, and the multiple first driving motors 321 and the multiple second driving motors 322 correspond to each other one by one. Moreover, the multiple first driving motors 321 and the multiple second driving motors 322 are both fixed on the installation bracket 31 through positioning holes and fixing bolts.

[0064] For example, as Figure 2As shown, the heat exchanger 100 is provided with two first driving motors 321 and two second driving motors 322. The two first driving motors 321 are arranged on the same side as the first end 121 of the heat exchange plate 12, and the two second driving motors 322 are arranged on the same side as the second end 122 of the heat exchange plate 12. Optionally, taking the heat exchanger 100 arranged in the Figure 2 orientation shown as an example for illustration, the two first driving motors 321 and the two second driving motors 322 are respectively arranged on the left sides of the four corners of the heat exchanger body 1, and neither of them contacts the housing 11 of the heat exchanger body 1.

[0065] Furthermore, the output ends of the two first driving motors 321 are each provided with a first rotating shaft 3211. Each scraper 21 is correspondingly provided with two first traction lines 22. Among them, one end of the first first traction line 22 is fixedly connected to the scraper 21, and the other end of the first first traction line 22 is wound around the first rotating shaft 3211 corresponding to one of the first driving motors 321. One end of the second first traction line 22 is fixedly connected to the scraper 21, and the other end of the second first traction line 22 is wound around the first rotating shaft 3211 corresponding to the other first driving motor 321. Similarly, the output ends of the two second driving motors 322 are each provided with a second rotating shaft 3221. Each scraper 21 is correspondingly provided with two second traction lines 23. Among them, one end of the first second traction line 23 is fixedly connected to the scraper 21, and the other end of the first second traction line 23 is wound around the second rotating shaft 3221 corresponding to one of the second driving motors 322. One end of the second second traction line 23 is fixedly connected to the scraper 21, and the other end of the second second traction line 23 is wound around the second rotating shaft 3221 corresponding to the other second driving motor 322.

[0066] When it is necessary to clean the side wall of the heat exchange plate 12 corresponding to the scraper 21, the two first driving motors 321 respectively drive the two first traction lines 22 to wind around their corresponding first rotating shafts 3211. It can be understood that it is necessary to ensure the consistency of the rotation speeds of the two first rotating shafts 3211. The two second driving motors 322 respectively drive the two second traction lines 23 to leave their corresponding second rotating shafts 3221. With such a setting, under the action of the two first traction lines 22 and the two second traction lines 23, the scraper 21 moves upward along the second direction Y relative to the side wall of the heat exchange plate 12. And during the movement of the scraper 21, the scraper 21 can clean and scrape the dirt on the side wall of the heat exchange plate 12. At the same time, the two first traction lines 22 and the two second traction lines 23 can improve the stability of the scraper 21 during the movement, preventing the scraper 21 from shifting when moving along the second direction Y, so as to avoid incomplete dirt scraping and affecting the cleaning quality.

[0067] Of course, the number of the first driving motor 321 and the second driving motor 322 can be further increased. For example, when there are three first driving motors 321, there are also three second driving motors 322, and each scraper 21 is correspondingly provided with three first traction lines 22 and three second traction lines 23. For the specific connection manner of the three first traction lines 22 and the three second traction lines 23, please refer to the above, which will not be elaborated here. In this way, through the cooperative action of the three first traction lines 22 and the three second traction lines 23, the stability of the scraper 21 during movement can be further improved. However, the number of the first driving motor 321 and the second driving motor 322 needs to be set according to the actual situation, such as according to the size of the heat exchanger body 1 and the size of the scraper 21, and no specific limitation is made here.

[0068] In some embodiments of the present application, as Figures 2-4 shown, a guide rail extending along the second direction Y is provided on the side wall of the heat exchange plate 12, the scraper 21 is arranged on the guide rail, and the scraper 21 is movable relative to the guide rail along the second direction Y.

[0069] Specifically, a guide rail is provided on the side wall of the heat exchange plate 12. Optionally, the guide rail adopts a detachable design, which is convenient to replace different guide rails according to the size of the heat exchange plate 12 and enhances the versatility of the guide rail. The scraper 21 is movably arranged on the guide rail. For example, the scraper 21 has a slider correspondingly arranged with the guide rail. The slider is fixed on the scraper 21, and at least part of the slider can be arranged in the guide rail. Driven by the driving member 32, the scraper 21 can move up and down relative to the guide rail along the second direction Y through the slider. It can be understood that the guide rail has a certain limiting function on the slider, so as to ensure that the scraper 21 will not deviate during the movement process.

[0070] In some embodiments of the present application, an electromagnetic device can be embedded in the guide rail, and the slider can be made of a magnetic material. By magnetic levitation, the physical friction between the scraper 21 and the guide rail can be reduced, thereby prolonging the service life of the guide rail and the scraper 21.

[0071] In some embodiments of the present application, as Figure 1 shown, the housing 11 has a first opening and a second opening communicating with the installation space. Along the first direction X, the two heat exchange plates 12 at both ends among the plurality of heat exchange plates 12 are respectively a first plate and a second plate. The first plate is connected to the housing 11 and is used to block the first opening, and the second plate is connected to the housing 11 and is used to block the second opening.

[0072] Specifically, the housing 11 is integrally in a rectangular structure. Along the first direction X, the housing 11 has a first opening and a second opening arranged oppositely, and an installation space is formed inside the housing 11, wherein the first opening and the second opening both communicate with the installation space.

[0073] Furthermore, asFigure 5 As shown, along the first direction X, a plurality of heat exchange plates 12 are arranged at intervals from left to right in sequence. Assuming that the leftmost heat exchange plate 12 is the first plate and the rightmost heat exchange plate 12 is the second plate, when the heat exchange plates 12 are assembled with the housing 11, a plurality of heat exchange plates 12 are fixedly installed in the installation space, and the first plate is used to block the first opening and the second plate is used to block the second opening. It can be understood that the first plate serves as the first end plate of the heat exchanger body 1, and the second plate serves as the second end plate of the heat exchanger body 1. The first plate and the second plate can directly exchange heat with the external space.

[0074] Further, with continued reference to Figure 5 As shown, a plurality of heat exchange plates 12 arranged at intervals in sequence can divide the installation space in the housing 11 into a plurality of first heat exchange chambers 13 and a plurality of second heat exchange chambers 14. The plurality of first heat exchange chambers 13 are sequentially connected through pipelines 19, and the plurality of second heat exchange chambers 14 are sequentially connected through pipelines 19. It should be noted that the outer peripheral wall of the heat exchange plate 12 is hermetically connected to the inner wall of the housing 11. In this way, it is ensured that the plurality of first heat exchange chambers 13 are only connected through the pipelines 19, the plurality of second heat exchange chambers 14 are only connected through the pipelines 19, and it is also possible to prevent the heat exchange fluids in the first heat exchange chambers 13 and the second heat exchange chambers 14 from mixing.

[0075] In some embodiments of the present application, as shown in Figure 5 a plurality of first heat exchange chambers 13 and a plurality of second heat exchange chambers 14 are arranged alternately in sequence.

[0076] Specifically, the specific structure of the alternate arrangement of the plurality of first heat exchange chambers 13 and the plurality of second heat exchange chambers 14 is that along the first direction X, an alternate arrangement form of one first heat exchange chamber 13, one second heat exchange chamber 14, another first heat exchange chamber 13, and another second heat exchange chamber 14 is sequentially set, and the number of the first heat exchange chambers 13 and the number of the second heat exchange chambers 14 in the alternate arrangement are not limited.

[0077] As a specific example, as shown in Figure 5 along the first direction X, eight heat exchange plates 12 are arranged at intervals from left to right in sequence. The eight heat exchange plates 12 divide the installation space in the housing 11 into four first heat exchange chambers 13 and three second heat exchange chambers 14. Among them, the four first heat exchange chambers 13 and the three second heat exchange chambers 14 are arranged alternately in sequence. With such a setting, it can be ensured that each first heat exchange chamber 13 can exchange heat with the adjacent second heat exchange chamber 14 through the heat exchange plate 12, which is beneficial to improving the overall heat exchange efficiency of the heat exchanger 100.

[0078] In some embodiments of the present application, as shown in Figure 1 、 Figure 2 and Figure 5As shown, the heat exchanger body 1 has a cold fluid inlet 15, a cold fluid outlet 16, a hot fluid inlet 17, and a hot fluid outlet 18. The cold fluid inlet 15 and the cold fluid outlet 16 are both connected to each first heat exchange chamber 13, and the hot fluid inlet 17 and the hot fluid outlet 18 are both connected to each second heat exchange chamber 14. Among them, the scraper 21 is arranged in the first heat exchange chamber 13.

[0079] Specifically, as Figure 2 and Figure 5 shown, the first plate is provided with a cold fluid inlet 15, a cold fluid outlet 16, a hot fluid inlet 17, and a hot fluid outlet 18. The cold fluid inlet 15, the cold fluid outlet 16, the hot fluid inlet 17, and the hot fluid outlet 18 are respectively connected to the external heat exchange fluid inlet and outlet pipes through flanges.

[0080] Furthermore, the cold fluid inlet 15 and the cold fluid outlet 16 are both connected to each first heat exchange chamber 13. Continuing to refer to Figure 5 shown, the cold fluid inlet 15 is connected to the leftmost first heat exchange chamber 13. The four first heat exchange chambers 13 are all connected in sequence through a pipeline 19 (i.e., the cold fluid inlet pipeline). The cold fluid outlet 16 is connected to the leftmost first heat exchange chamber 13. The four first heat exchange chambers 13 are all connected in sequence through a pipeline 19 (i.e., the cold fluid outlet pipeline). With such a setting, the cold fluid medium input from the cold fluid inlet 15 flows through the four first heat exchange chambers 13 in sequence and then flows out from the cold fluid outlet 16.

[0081] The hot fluid inlet 17 and the hot fluid outlet 18 are both connected to each second heat exchange chamber 14. Continuing to refer to Figure 5 shown, the hot fluid inlet 17 is connected to the three second heat exchange chambers 14 in sequence through a pipeline 19 (i.e., the hot fluid inlet pipeline). The hot fluid outlet 18 is connected to the three second heat exchange chambers 14 in sequence through a pipeline 19 (i.e., the hot fluid outlet pipeline). With such a setting, the hot fluid medium input from the hot fluid inlet 17 flows through the three second heat exchange chambers 14 in sequence and then flows out from the hot fluid outlet 18.

[0082] In some embodiments of the present application, along the second direction Y, the cold fluid inlet 15 and the cold fluid outlet 16 are oppositely arranged. For example, the cold fluid inlet 15 is arranged above the cold fluid outlet 16. In this way, the countercurrent flow of the cold fluid medium inside the heat exchanger body 1 can be realized, and a single fluid enters and exits on the same side. At the same time, the dirt cleaned by the scraper 21 can also be discharged from the cold fluid outlet 16; along the second direction Y, the hot fluid inlet 17 and the hot fluid outlet 18 are oppositely arranged. For example, the hot fluid inlet 17 is arranged above the hot fluid outlet 18. In this way, the countercurrent flow of the hot fluid medium inside the heat exchanger body 1 can be realized, and a single fluid enters and exits on the same side. At the same time, the dirt cleaned by the scraper 21 can also be discharged from the hot fluid outlet 18.

[0083] In some embodiments of the present application, a cold fluid medium flows in the first heat exchange chamber 13. The cold fluid medium is more likely to adhere to the side wall of the heat exchange plate 12 during the heat exchange process compared to the hot fluid medium. Therefore, by arranging the scraper 21 in the first heat exchange chamber 13, it is possible to handle the dirt adhering to the side wall of the heat exchange plate 12, reduce the flow resistance in the first heat exchange chamber 13, reduce the thermal resistance of the heat exchange plate 12, increase the heat transfer coefficient, and improve the heat exchange efficiency.

[0084] In some embodiments of the present application, as Figure 5 shown, along the first direction X, at least one of the two heat exchange chambers at both ends of the plurality of first heat exchange chambers 13 is located on the outermost side of the heat exchanger body 1. That is to say, along the first direction X, at least one of the two heat exchange chambers at both ends of the plurality of first heat exchange chambers 13 through which the cold fluid medium flows is located on the outermost side of the heat exchanger body 1. Referring to Figure 5 shown, the outermost sides of the heat exchanger body 1 are respectively two first heat exchange chambers 13. With such an arrangement, it is preferably designed that the outermost side is a low-temperature fluid channel to avoid waste caused by heat loss of the high-temperature fluid.

[0085] In some embodiments of the present application, a sensor is further provided in the heat exchanger body 1. The sensor is used to obtain the dirt thickness on the side wall of the heat exchange plate 12, and the driving assembly 3 is configured to drive the scraper 21 to clean the side wall of the heat exchange plate 12 according to the dirt thickness.

[0086] Specifically, the sensor includes but is not limited to an optical sensor, an ultrasonic sensor, and an optical fiber sensor. The sensor can obtain the dirt thickness on the side wall of the heat exchange plate 12, and the driving assembly 3 is configured to drive the scraper 21 to clean the side wall of the heat exchange plate 12 according to the dirt thickness. For example, when the sensor detects that the dirt thickness on the side wall of the heat exchange plate 12 is 2 mm, the driving assembly 3 drives the scraper 21 to clean the side wall of the heat exchange plate 12. With such an arrangement, not only can the real-time detection of the dirt thickness be realized, but also the dirt accumulated after a certain amount can be cleaned in time, greatly improving the cleaning function.

[0087] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such a process, method, commodity or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, commodity or device including the said element.

[0088] Each embodiment in this specification is described in a progressive manner. For the identical or similar parts among the embodiments, reference can be made to each other, and the differences between each embodiment and other embodiments are emphasized. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and reference can be made to the relevant part of the method embodiment for the related content.

[0089] The above description is only for the embodiments of the present application and is not intended to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

[0090] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A heat exchanger, characterized in that: include: A heat exchanger body, the heat exchanger body comprising a shell and a plurality of heat exchange plates, the shell forming an installation space, the plurality of heat exchange plates being sequentially spaced and fixedly arranged in a first direction in the installation space, so as to divide the installation space into a plurality of first heat exchange chambers and a plurality of second heat exchange chambers, the plurality of first heat exchange chambers being suitable for heat exchange with the plurality of second heat exchange chambers; A cleaning assembly, the cleaning assembly comprising a scraper, the scraper being movably disposed on a side wall of the heat exchange plate; A driving assembly is connected to the scraper in driving relation, and the driving assembly is suitable for driving the scraper to move relative to the heat exchange plate so that the scraper cleans the side wall of the heat exchange plate.

2. The heat exchanger according to claim 1, characterized in that: The driving assembly includes: a mounting bracket and a driving member, wherein the mounting bracket is fixedly mounted on the outside of the heat exchanger body, the driving member is fixedly arranged on the mounting bracket, the driving member is drivingly connected to the scraper, and the driving member is suitable for driving the scraper to move relative to the heat exchange plate.

3. The heat exchanger according to claim 2, characterized in that: The driving member comprises a first driving motor and a second driving motor, the output end of the first driving motor is provided with a first rotating shaft, the output end of the second driving motor is provided with a second rotating shaft, the first rotating shaft and the second rotating shaft are arranged opposite to each other along a second direction and are respectively located on both sides of the heat exchange plate; The cleaning assembly also includes a first traction line and a second traction line. Along the second direction, one end of the first traction line is fixedly connected to the scraper, and the other end of the first traction line is wound around the first rotating shaft. Along the second direction, one end of the second traction line is fixedly connected to the scraper, and the other end of the second traction line is wound around the second rotating shaft. The second direction is perpendicular to the first direction.

4. The heat exchanger according to claim 3, characterized in that Along the second direction, the heat exchange plate has a first end and a second end, a portion of the first rotating shaft is arranged in the heat exchanger body, and along the second direction, the first rotating shaft located in the heat exchanger body is arranged on the same side as the first end and is spaced apart from the first end, and a portion of the second rotating shaft is arranged in the heat exchanger body, and along the second direction, the second rotating shaft located in the heat exchanger body is arranged on the same side as the second end and is spaced apart from the second end.

5. The heat exchanger according to claim 3, characterized in that: There are a plurality of the first drive motors and a plurality of the second drive motors, and the plurality of the first drive motors correspond one to one to the plurality of the second drive motors.

6. The heat exchanger according to claim 3, characterized in that: The side wall of the heat exchange plate is provided with a guide rail extending along the second direction, the scraper is provided on the guide rail, and the scraper is movable relative to the guide rail along the second direction.

7. The heat exchanger according to any one of claims 1 to 6, characterized in that: The shell has a first opening and a second opening connected to the installation space. Along the first direction, two of the heat exchange plates at both ends of the plurality of heat exchange plates are respectively a first plate and a second plate. The first plate is connected to the shell and used to block the first opening, and the second plate is connected to the shell and used to block the second opening.

8. The heat exchanger according to claim 7, characterized in that The plurality of first heat exchange chambers and the plurality of second heat exchange chambers are arranged alternately in sequence.

9. The heat exchanger according to claim 8, characterized in that The heat exchanger body has a cold fluid inlet, a cold fluid outlet, a hot fluid inlet and a hot fluid outlet; The cold fluid inlet and the cold fluid outlet are communicated with each of the first heat exchange chambers, and the hot fluid inlet and the hot fluid outlet are communicated with each of the second heat exchange chambers, wherein the scraper is arranged in the first heat exchange chamber.

10. The heat exchanger according to claim 8, characterized in that Along the first direction, at least one of the two heat exchange cavities at both ends of the plurality of first heat exchange cavities is located at the outermost side of the heat exchanger body.

11. The heat exchanger according to any one of claims 1 to 6, characterized in that: A sensor is also provided in the heat exchanger body, and the sensor is used to obtain the dirt thickness on the side wall of the heat exchange plate. The driving component is configured to drive the scraper to clean the side wall of the heat exchange plate according to the dirt thickness.

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