Cleaning device for heat exchanger, heat exchanger and heat pump unit

Abstract

The present application relates to heat exchanger cleaning technical field, specifically provide a kind of for heat exchanger cleaning device, heat exchanger and heat pump unit, to solve the problem of poor cleaning effect of the cleaning device of existing heat exchanger.For this purpose, the cleaning device for heat exchanger of the present application is set to be able to be placed in the inside of heat exchanger to clean the inside of the heat exchange tube of heat exchanger, it includes main body, telescopic component and first drive component, main body is set to be able to be fixedly connected with heat exchanger, telescopic component is provided with bristle structure, first drive component is connected with main body, and first drive component is set to be able to drive telescopic component rotation to make bristle structure rotate and thus clean the inside of heat exchange tube.The cleaning device of the present application can effectively clean the inside of heat exchange tube by rotating cleaning mode through the common setting of first drive component and telescopic component, and also can selectively change the telescopic length of telescopic component according to the length of heat exchange tube to effectively ensure cleaning range and cleaning effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heat exchanger cleaning, and specifically provides a cleaning device for a heat exchanger, a heat exchanger and a heat pump unit. BACKGROUND

[0002] During use, water-side dirt continuously accumulates in the heat exchange pipes of the heat exchanger, and the more dirt, the worse the heat exchange effect. In order to ensure the heat exchange effect, the heat exchange pipes need to be cleaned regularly. There are two existing cleaning methods for heat exchangers: one is to disassemble the water chamber of the heat exchanger and then clean the heat exchange pipes one by one manually, but this method is time-consuming and laborious in terms of disassembling and assembling the end cover and cleaning the heat exchange pipes; the other is to install a rubber ball type automatic online cleaning device, which can clean the heat exchange pipes by automatically controlling the sending and receiving of rubber balls through a program. Although this method does not require disassembling and assembling the end cover, it has the problem that the rubber balls are easy to get stuck in the pipes, blocking the heat exchange pipes and thus reducing the effective heat exchange area and affecting the heat exchange capacity and effect of the heat exchanger.

[0003] Correspondingly, there is a need in the art for a new cleaning device for a heat exchanger, a heat exchanger and a heat pump unit to solve the above problems. SUMMARY

[0004] The present application aims to solve the above technical problems, i.e., to solve the problem of poor cleaning effect of the existing cleaning device for a heat exchanger.

[0005] In a first aspect, the present application provides a cleaning device for a heat exchanger, which is arranged to be placed inside the heat exchanger to clean the inside of the heat exchange pipes of the heat exchanger, comprising a main body, an extension member and a first driving member, the main body is arranged to be fixedly connected with the heat exchanger, the extension member is provided with a brush structure, and the first driving member is connected with the main body and arranged to drive the extension member to rotate so that the brush structure rotates and thus cleans the inside of the heat exchange pipes.

[0006] In the preferred technical solution of the above cleaning device, the extension member comprises a first rod and a second rod,

[0007] the second rod is sleeved outside the first rod, and the first rod can move relative to the second rod to realize extension and retraction.

[0008] In the preferred technical solution of the above cleaning device, a plurality of tooth groove structures are arranged on the first rod,

[0009] the plurality of tooth groove structures are arranged to accommodate the brush structure when the first rod is retracted into the second rod.

[0010] In the preferable technical scheme of the cleaning device, the cleaning device further comprises a second driving member,

[0011] The second driving member is connected with the first driving member, the second driving member is arranged to drive the telescopic member to telescope, and the first driving member is further arranged to drive the second driving member to rotate and thus drive the telescopic member to rotate.

[0012] In the preferable technical scheme of the cleaning device, the first driving member is a driving motor, and the second driving member is a driving cylinder,

[0013] The driving rod of the driving cylinder is connected with the first rod to drive the first rod to move relative to the second rod and thus telescope, and the driving shaft of the driving motor is connected with the main body of the driving cylinder to enable the driving motor to drive the driving cylinder to rotate and thus drive the telescopic member to rotate.

[0014] In the preferable technical scheme of the cleaning device, the cleaning device further comprises a telescopic fixing member, the telescopic fixing member is connected with the main body,

[0015] When the telescopic fixing member is in the extended state, the main body can be abutted to the inner wall of the heat exchange pipe by the telescopic fixing member to realize the fixed connection with the heat exchanger.

[0016] In the preferable technical scheme of the cleaning device, the cleaning device further comprises a moving member, the moving member is connected with the main body,

[0017] When the telescopic fixing member is in the contracted state, the main body can be separated from the fixed connection relationship with the heat exchanger and can move in the heat exchange pipe by the moving member and thus realize the moving cleaning.

[0018] In the second aspect, the application further provides a heat exchanger for a heat pump unit, the heat exchanger comprising the cleaning device in any of the preferable technical schemes.

[0019] In the preferable technical scheme of the heat exchanger, the heat exchanger is a shell-and-tube heat exchanger, the water chamber of the shell-and-tube heat exchanger is provided with a containing cavity, and the cleaning device can be contained in the containing cavity.

[0020] In the third aspect, the application further provides a heat pump unit, the heat pump unit comprising the heat exchanger in any of the preferable technical schemes.

[0021] In the technical scheme, the cleaning device can clean the scale in the heat exchange pipe by rotating cleaning, and the length of the telescopic member can be changed according to the length of the heat exchange pipe, so that the cleaning range is ensured and the cleaning effect of the cleaning device is improved. In addition, the telescopic member can be conveniently stored. The cleaning device can quickly, conveniently and efficiently clean the heat exchange pipe.

[0022] In addition, in the preferred technical scheme of the present application, the plurality of tooth groove structures on the first rod member can facilitate the storage of the bristle structure and effectively simplify the structure of the cleaning device, thereby facilitating the preparation.

[0023] In addition, in the preferred technical scheme of the present application, the telescopic fixing member can fix the main body relative to the heat exchange pipe when the cleaning device cleans the scale in the heat exchange pipe, thereby further improving the cleaning effect of the cleaning device.

[0024] In addition, in the preferred technical scheme of the present application, the movement member can move the cleaning device in the heat exchange pipe to clean each part of the heat exchange pipe. BRIEF DESCRIPTION OF DRAWINGS

[0025] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0026] Figure 1 is a partial structure schematic view of the heat exchanger of the present application, which shows the setting position of the cleaning device;

[0027] Figure 2 is a partial structure schematic view of the heat exchanger of the present application;

[0028] Figure 3 is a structure schematic view of the cleaning device of the present application;

[0029] Figure 4 is a structure schematic view of the telescopic member of the present application;

[0030] REFERENCE SIGNS:

[0031] 1, heat exchanger; 11, heat exchange pipe; 12, water chamber;

[0032] 2, cleaning device;

[0033] 21, main body;

[0034] 22, telescopic member; 221, bristle structure; 222, first rod member; 2221, tooth groove structure; 223, second rod member;

[0035] 23, telescopic fixing member; 231, second telescopic rotating arm; 232, fixing member;

[0036] 24, moving member. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application. Those skilled in the art can make adjustments as needed to adapt to specific application occasions. For example, the present application does not make any limitation on the specific application object of the cleaning device, which can be used in shell-and-tube heat exchangers, and can also be used in double-pipe heat exchangers, which are not limiting. Those skilled in the art can set the application object of the cleaning device of the present application according to the actual use requirements. Such changes related to the application object do not deviate from the basic principles of the present application, and belong to the protection scope of the present application.

[0038] It should be noted that in the description of the present application, the terms indicating the direction or positional relationship of "left", "lower", "inner", "outer" and the like are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the structural features must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", "fourth" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In addition, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] First refer to Figures 1 to 4 , wherein, Figure 1 is a partial structure diagram of the heat exchanger of the present application, which shows the setting position of the cleaning device, Figure 2 is a partial structure diagram of the heat exchanger of the present application, Figure 3 is a structure diagram of the cleaning device of the present application, Figure 4 is a structure diagram of the telescopic member of the present application. As Figures 1 to 4As shown, the cleaning device 2 of the present application is arranged to be placed inside the heat exchanger 1 to clean the inside of the heat exchange pipe 11 of the heat exchanger 1, and the cleaning device 2 comprises a main body 21, an extension member 22 and a first driving member (not shown in the figure), the main body 21 is arranged to be fixedly connected with the heat exchanger 1, the extension member 22 is provided with a brush structure 221, the first driving member is connected with the main body 21, and the first driving member is arranged to drive the extension member 22 to rotate so that the brush structure 221 rotates and thus cleans the inside of the heat exchange pipe 11.

[0041] It should be noted that the present application does not make any limitation on the specific structure of the main body 21, and those skilled in the art can set it according to the actual situation. As a specific embodiment, the main body 21 comprises a shell, the shell is provided with a first connecting hole, the first driving member is arranged in the shell and connected with the shell, and the first driving member is arranged to drive the extension member 22 to rotate through the first connecting hole so that the brush structure 221 rotates and thus cleans the inside of the heat exchange pipe 11.

[0042] In addition, it should also be noted that the present application does not make any limitation on the specific structure of the brush structure 221 and the material of the bristles of the brush structure 221; preferably, the bristles of the brush structure 221 are made of soft elastic material (such as rubber), and the cleaning area of the bristles of the brush structure 221 after unfolding is larger than the peripheral surface of the heat exchange pipe 11, so that the bristles of the brush structure 221 can fully wash the inner wall of the heat exchange pipe 11, thereby further effectively improving the cleaning effect of the cleaning device 2.

[0043] Further preferably, the extension member 22 comprises a first rod 222 and a second rod 223, the second rod 223 is sleeved outside the first rod 222, the first rod 222 can move relative to the second rod 223 to realize extension, and the brush structure 221 is arranged on the first rod 222. Further, the extension member 22 further comprises a limiting member (not shown in the figure), which is arranged at the end directly connected with the first rod 222 and the second rod 223, so as to effectively avoid the problem that the moving range of the first rod 222 relative to the second rod 223 to the left (refer to the direction in the figure) is too large to cause the first rod 222 to be separated from the second rod 223. Figure 3 and 4

[0044] ​It should be noted that the present invention does not impose any restrictions on the specific structure and location of the limiting member. Those skilled in the art may determine the location based on actual circumstances, as long as the first rod 222 does not fall out of the second rod 223 when moving leftward relative to the second rod 223. Furthermore, it should be noted that the present invention does not impose any restrictions on the specific shapes of the first rod 222 and the second rod 223; preferably, the first rod 222 and the second rod 223 are both cylindrical in shape to match the internal structure of the heat exchange tube 11, thereby further effectively improving the cleaning effect of the cleaning device 2.

[0045] Furthermore, the first rod 222 is provided with a plurality of tooth-groove structures 2221, which are configured to accommodate the bristle structure 221 when the first rod 222 is retracted into the second rod 223. Specifically, the tooth-groove structures 2221 are provided on the curved side of the bristles of the bristle structure 221, corresponding to the bristles of the bristle structure 221. When the first rod 222 and the second rod 223 are nested together, the bristles can be accommodated in the tooth-groove structures 2221. It should be noted that the present invention does not impose any restrictions on the specific structure and shape of the tooth-groove structures 2221; as long as they can accommodate the bristle structure 221, those skilled in the art can customize them according to actual circumstances.

[0046] In addition, it should be noted that the present invention does not impose any restrictions on the specific structure of the telescopic member 22. It can also include a third rod, a fourth rod, or even more rods. That is, the present invention does not impose any restrictions on the specific number of rods. Specifically, the first rod 222 is sleeved on the outside of the third rod, and the third rod is sleeved on the outside of the third rod, and the third rod and the fourth rod are respectively provided with a bristle structure 221 and a tooth groove structure 2221; in addition, the limiting member is provided between the first rod 222 and the third rod and between the third rod and the fourth rod to prevent the third rod and the fourth rod from falling out during movement. Those skilled in the art can set the number of rods according to the actual cleaning situation of the cleaning device 2.

[0047] Further preferably, the cleaning device 2 also includes a second driving member, which is connected to the first driving member, and the second driving member is configured to drive the telescopic member 22 to extend and retract, and the first driving member is also configured to drive the second driving member to rotate and thereby drive the telescopic member 22 to rotate.

[0048] It should be noted that the present invention does not impose any restrictions on the specific structures of the first driving member and the second driving member, nor does it impose any restrictions on the specific implementation method of the first driving member driving the second driving member to rotate. Those skilled in the art can set it according to actual conditions.

[0049] As a preferred embodiment, the first driving member is a driving motor, the second driving member is a driving cylinder, a driving rod of the driving cylinder is connected with the first rod 222 to drive the first rod 222 to move relative to the second rod 223 and thus realize the telescopic movement, and a driving shaft of the driving motor is connected with a main body of the driving cylinder to enable the driving motor to drive the driving cylinder to rotate and thus drive the telescopic member 22 to rotate. Specifically, the cleaning device 2 further comprises a rotating disc, the driving cylinder is fixedly connected with the rotating disc, and the driving shaft of the driving motor is connected with the rotating disc, the driving motor drives the rotating disc to rotate, and thus drives the driving cylinder to rotate and further drives the telescopic member 22 to rotate, and thus realizes the internal cleaning of the heat exchange pipe 11.

[0050] It should be noted that the specific structure and type of the driving cylinder and the driving motor are not limited in the present application, and a person skilled in the art can set them according to actual conditions. In addition, it should be noted that the specific connection mode of the driving cylinder and the first rod 222 is not limited in the present application, as long as the driving cylinder can drive the first rod 222 to extend and retract relative to the second rod 223, and a person skilled in the art can set it according to actual conditions.

[0051] Further, in the case that the cleaning device 2 comprises the third rod and the fourth rod, or even more rods, the driving cylinder is fixedly connected with the rod which is arranged farthest relative to the driving cylinder. In addition, the telescopic length of the driving cylinder is controllable to control the telescopic length of the telescopic member 22, and further improve the cleaning effect of the cleaning device 2.

[0052] In addition, in the present preferred embodiment, the cleaning device 2 further comprises a telescopic fixing member 23, which is connected with the main body 21. Specifically, the telescopic fixing member 23 is connected with another driving shaft of the driving motor through a second connecting hole arranged on the shell of the main body 21. When the telescopic fixing member 23 is in the extended state, the main body 21 can be abutted to the inner wall of the heat exchange pipe 11 through the telescopic fixing member 23 to realize the fixed connection with the heat exchanger 1.

[0053] It should be noted that the specific structure of the telescopic fixing member 23 is not limited in the present application, and a person skilled in the art can set it according to actual conditions.

[0054] As a preferred embodiment, the telescopic fixing member 23 comprises a first telescopic rotating arm (not shown in the figure), a second telescopic rotating arm 231 and a fixing member 232, the first telescopic rotating arm is rotationally connected with the second telescopic rotating arm 231, and the first telescopic rotating arm is connected with another driving shaft of the driving motor through the second connecting hole, and the fixing member 232 is connected with an end of the second telescopic rotating arm 231 away from the first telescopic rotating arm, when the telescopic fixing member 23 is in the stretched state, the main body 21 can be abutted to the inner wall of the heat exchange pipe 11 through the fixing member 232 to realize the fixed connection with the heat exchanger 1. The driving motor can drive the telescopic fixing member 23 to stretch and shrink, and can selectively make the main body 21 abut to the inner wall of the heat exchange pipe 11, and further can selectively make the main body 21 fixedly connected with the heat exchanger 1.

[0055] It should be noted that the present application does not make any limitation on the specific structure of the first telescopic rotating arm, the second telescopic rotating arm 231 and the fixing member 232, the fixing member 232 can be an electromagnetic suction type fixing member, or can be a fixing member capable of generating a large friction with the inner wall of the heat exchange pipe 11, which is not limited, and those skilled in the art can set it according to the actual situation.

[0056] Further preferably, the cleaning device 2 further comprises a moving member 24, the moving member 24 is connected with the main body 21, when the telescopic fixing member 23 is in the shrunk state, the main body 21 can be disconnected from the fixed connection relationship with the heat exchanger 1 and can move in the heat exchange pipe 11 through the moving member 24 and thus realize the moving cleaning.

[0057] It should be noted that the present application does not make any limitation on the specific structure and setting position of the moving member 24, as long as the main body 21 can realize the movement through the moving member 24. As a specific embodiment, the moving member 24 can be a roller, the roller is arranged below the shell of the main body 21 and is fixedly connected with the shell, so that when the telescopic fixing member 23 is in the shrunk state, the main body 21 can move in the heat exchange pipe 11 through the moving member 24 and thus realize the moving cleaning.

[0058] In the second aspect, the present application also claims a heat exchanger for a heat pump unit, the heat exchanger comprises the cleaning device 2 in the above preferred embodiment. It should be noted that the present application does not make any limitation on the specific structure and specific type of the heat exchanger 1, and those skilled in the art can set it according to the actual situation.

[0059] As a specific embodiment, as shown in Figure 1 and 2As shown, the heat exchanger 1 is a shell and tube heat exchanger, a containing cavity is arranged in a water chamber 12 of the shell and tube heat exchanger, and the cleaning device 2 can be accommodated into the containing cavity. It should be noted that the present application does not limit the specific structure of the water chamber 12 and the specific shape of the containing cavity, as long as the containing cavity can accommodate the cleaning device 2, and the person skilled in the art can set it according to the actual situation.

[0060] Further, the shell and tube heat exchanger further comprises a partition plate, a mounting hole (not shown in the figure) is further arranged on the shell of the water chamber 12, the partition plate is arranged in the containing cavity, the containing cavity is divided into a first containing cavity and a second containing cavity by the partition plate, the first containing cavity is in communication with the heat exchange pipe, the second containing cavity is selectively communicated with the outside through the mounting hole, and the partition plate is arranged to be opened and closed to selectively communicate the first containing cavity and the second containing cavity. When the heat exchange pipe 11 needs to be cleaned, the cleaning device 2 is put into the second containing cavity from the mounting hole, and then the partition plate is opened, so that the cleaning device 2 is transitioned from the second containing cavity to the first containing cavity, and further enters the heat exchange pipe 11 to clean the scale inside the heat exchange pipe 11.

[0061] It should be noted that the cleaning device 2 can be accommodated in the second containing cavity after use, or can be taken out from the mounting hole, which is not restrictive, and the person skilled in the art can set it according to the actual situation.

[0062] In addition, it should be noted that the present application does not limit the specific number of cleaning devices 2 arranged in the heat exchanger 1, and the person skilled in the art can set it according to the actual situation.

[0063] Exemplarily, the cleaning process of the cleaning device 2 for cleaning the heat exchange pipe 11 is as follows:

[0064] Firstly, the mounting hole is opened, a plurality of cleaning devices 2 are put into the second containing cavity from the mounting hole, and then the mounting hole is closed and the partition plate is opened, so that the cleaning device 2 is transitioned from the second containing cavity to the first containing cavity, and the cleaning device 2 can selectively enter the heat exchange pipe 11.

[0065] Then, when the cleaning device 2 enters one of the heat exchange pipes 11, the driving motor drives the telescopic fixing member 23 to expand, so that the main body 21 can be abutted to the inner wall of the heat exchange pipe 11 through the fixing member 232, to avoid the movement of the main body 21 during the cleaning process.

[0066] Afterwards, the driving cylinder drives the first rod 222 to move left relative to the second rod 223, and in the process of moving the first rod 222, the bristles of the bristle structure 221 are ejected from the tooth groove structure 2221, at this time, those skilled in the art can control the telescopic length of the first rod 222 according to the actual situation. Then, the driving motor drives the rotating disc to rotate, and drives the driving cylinder to rotate, and further drives the telescopic member 22 to rotate, so that the bristle structure 221 can clean the inner wall of the heat exchange pipe 11.

[0067] After the cleaning device 2 completes the cleaning work of the current area, the telescopic member 22 stops rotating, the telescopic fixing member 23 is retracted, the main body 21 is moved to the next area to be cleaned under the driving action of the moving member 24, and then the above cleaning action is repeated.

[0068] After the cleaning device 2 completes the cleaning work of the heat exchange pipe 11, the telescopic member 22 stops rotating, the driving cylinder drives the first rod 222 to retract relative to the second rod 223, and in the process of retracting the first rod 222, the bristles of the bristle structure 221 are retracted into the tooth groove structure 2221 accordingly, then the telescopic fixing member 23 is retracted, the main body 21 is moved into the first accommodating cavity through the moving member 24, and further into the second accommodating cavity, after the cleaning device 2 enters the second accommodating cavity, the partition plate is closed, at this time, those skilled in the art can selectively store the cleaning device 2 according to the actual situation, that is, the cleaning device 2 can be stored in the second accommodating cavity, or the cleaning device 2 can be recovered from the placing hole.

[0069] It should be noted that the above is only an exemplary use of the cleaning device 2, and the present application does not limit the specific use of the cleaning device 2, and those skilled in the art can set it according to the actual use requirement, and the change of this specific use does not deviate from the basic principle of the present application, so it will fall within the protection scope of the present application.

[0070] In a third aspect, the present application also claims to protect a heat pump unit, which comprises the heat exchanger 1 in the above preferred embodiment. It should be noted that the present application does not limit the specific setting position of the heat exchanger 1 in the heat pump unit, nor does it limit the specific structure of the heat pump unit, and those skilled in the art can set it according to the actual situation.

[0071] The technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical schemes after the changes or replacements will all fall within the protection scope of the present application.

Claims

1. A cleaning device for a heat exchanger, characterized in that The cleaning device is arranged to be placed inside the heat exchanger to clean the inside of the heat exchange tube of the heat exchanger, which comprises a main body, an extension member and a first driving member, the main body is arranged to be fixedly connected with the heat exchanger, the extension member is provided with a brush structure, the first driving member is connected with the main body, and the first driving member is arranged to drive the extension member to rotate so that the brush structure rotates and thus cleans the inside of the heat exchange tube; The extension member comprises a first rod and a second rod, The second rod is sleeved outside the first rod, and the first rod can move relative to the second rod to realize extension and contraction; The brush structure is arranged on the first rod, The first rod is provided with a plurality of tooth groove structures, The plurality of tooth groove structures are arranged to accommodate the brush structure when the first rod is retracted into the second rod.

2. The cleaning apparatus of claim 1, wherein The cleaning device further comprises a second driving member, The second driving member is connected with the first driving member, the second driving member is arranged to drive the extension member to extend and contract, and the first driving member is further arranged to drive the second driving member to rotate and thus drive the extension member to rotate.

3. The cleaning apparatus of claim 2, wherein The first driving member is a driving motor, and the second driving member is a driving cylinder, The driving rod of the driving cylinder is connected with the first rod to drive the first rod to move relative to the second rod and thus realize extension and contraction, and the driving shaft of the driving motor is connected with the main body of the driving cylinder, so that the driving motor can drive the driving cylinder to rotate and thus drive the extension member to rotate.

4. The cleaning device according to any one of claims 1 to 3, characterized in that The cleaning device further comprises an extension fixing member, the extension fixing member is connected with the main body, When the extension fixing member is in an extended state, the main body can be abutted to the inner wall of the heat exchange tube through the extension fixing member to realize fixed connection with the heat exchanger.

5. The cleaning apparatus of claim 4, wherein The cleaning device further comprises a moving member, the moving member is connected with the main body, When the extension fixing member is in a retracted state, the main body can be disconnected from the fixed connection relationship with the heat exchanger and can move in the heat exchange tube through the moving member and thus realize moving cleaning.

6. A heat exchanger for a heat pump unit, characterized by The heat exchanger comprises the cleaning device of any one of claims 1 to 5.

7. The heat exchanger of claim 6, wherein The heat exchanger is a shell and tube heat exchanger, and the shell and tube heat exchanger is provided with a containing cavity in a water chamber, and the cleaning device can be accommodated in the containing cavity.

8. A heat pump unit, characterized by The heat pump unit comprises the heat exchanger of claim 6 or 7.

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