CN213238607U

CN213238607U - Heat exchanger with self-cleaning function

Info

Publication number: CN213238607U
Application number: CN202022069856.8U
Authority: CN
Inventors: 方志强; 周书林; 黄刚
Original assignee: Nantong Zhongyi Environmental Technology Co ltd
Current assignee: Nantong Zhongyi Environmental Technology Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-05-18
Anticipated expiration: 2030-09-18

Abstract

The application relates to a heat exchanger with a self-cleaning function, which comprises a frame body, wherein end walls at two ends of the frame body are outwards bent and provided with extension ring plates; an opening at one side of the frame body is an air inlet, and a dustproof net is detachably arranged in the frame body and at the position of the air inlet; the end wall of the extending ring plate at the position of the air inlet is provided with screw rods which are respectively and rotatably connected with the positions at the two sides of the air inlet, the two screw rods are respectively in threaded connection with mounting blocks, and a cleaning brush for cleaning a dust screen is fixedly connected between the two mounting blocks; the extension annular plate is also provided with a driving motor for driving the screw rod to rotate. This application is through the filter of dust screen to the air, has reduced debris such as dust and has got into inside the heat exchanger, and the availability factor of heat exchanger has been improved to the influence of attaching to radiating fin because of dust etc. to heat exchanger heat exchange efficiency that has significantly reduced.

Description

Heat exchanger with self-cleaning function

Technical Field

The application relates to the technical field of heat energy exchange equipment, in particular to a heat exchanger with a self-cleaning function.

Background

The heat exchanger, which may also be called a surface cooler, has the principle that a heat medium or a refrigerant or a refrigerating medium flows through an inner cavity of a metal pipeline, and air to be treated flows through the outer wall of the metal pipeline for heat exchange to achieve the purpose of heating or cooling the air.

The prior Chinese patent with publication number CN205825390U discloses a novel air conditioning unit surface cooler, which comprises a surface cooler frame, a heat exchange circulating pipe and radiating fins, wherein the surface cooler frame can also be called a frame body; a plurality of radiating fins are arranged in the frame body, and all the radiating fins are arranged in parallel with one side plate of the frame body; the heat exchange circulating pipe penetrates through the radiating fins and is arranged in the frame body, and two ends of the heat exchange circulating pipe respectively penetrate through two side plates of the frame body and are communicated by bent pipes to form a plurality of flow channels for the fluid to flow circularly; the inlet and outlet of the flow passage are respectively communicated with two manifolds. When the heat exchanger works, fluid is introduced from the manifold at the inlet of the flow channel, flows out from the manifold at the outlet of the flow channel, and flows into the flow channel again after being cooled or heated to form circulation. One side of the opening of the frame body is an air inlet, and the other side of the opening of the frame body is an air outlet. Air enters the frame body from the air inlet, exchanges heat with fluid in the heat exchange circulating pipe through the radiating fins, and is exhausted from the air outlet through the fan.

In order to improve the heat exchange efficiency, the number of the heat dissipation fins in the frame is generally large, and the distance between the heat dissipation fins is small, so that after the heat exchanger is used for a long time, the surfaces of the heat dissipation fins and the gaps between the heat dissipation fins are easy to be adhered with dust or other impurities, the heat exchange efficiency of the heat exchanger is influenced, and the improvement is needed.

SUMMERY OF THE UTILITY MODEL

In order to reduce the debris such as the inside dust that get into the heat exchanger to improve the availability factor of heat exchanger, this application provides a take self-cleaning function's heat exchanger.

The application provides a take self-cleaning function's heat exchanger adopts following technical scheme:

a heat exchanger with a self-cleaning function comprises a frame body, wherein end walls at two ends of the frame body are outwards bent and provided with extension ring plates, and an opening at one side of the frame body is an air inlet; a dustproof net is detachably arranged in the frame body and at the position of the air inlet; the end wall of the extending annular plate at the position of the air inlet is provided with a screw rod, the screw rods are respectively and rotatably connected with the two sides of the air inlet, the two screw rods are respectively in threaded connection with mounting blocks, and a cleaning brush for cleaning a dust screen is fixedly connected between the two mounting blocks; the extension annular plate is also provided with a driving motor for driving the screw rod to rotate.

By adopting the technical scheme, the dust screen can filter dust, flocculent impurities and the like in the air, so that the side walls of the radiating fins are kept clean, and the situation that the impurities such as dust are attached to the radiating fins to reduce the heat exchange efficiency of the heat exchanger is reduced. The cleaning brush is driven to move back and forth relative to the dustproof net by starting the driving motor to rotate forwards or reversely, so that the dustproof net is cleaned, and the dustproof net is prevented from being blocked by impurities such as dust and the like to influence the ventilation effect. The cleaning brush is connected with the lead screw through the sliding block and slides along with the rotation of the lead screw, and the cleaning brush is simple in structure, stable in movement and beneficial to cleaning the filter screen by the cleaning brush. After the heat exchanger uses a period, can pull down the dust screen, conveniently carry out degree of depth cleanness to the dust screen, prevent that bacterial etc. from breeding.

Optionally, an abutting ring plate is arranged on the inner side wall of the frame body and close to the air inlet along the circumferential direction of the air inlet, a placing groove capable of placing a dust screen is formed between the abutting ring plate and the inner side wall of the frame body, an installation ring plate is arranged on the periphery of the dust screen, and the end wall of the installation ring plate abuts against the end wall of the abutting ring plate facing the air inlet; the end wall of the extension annular plate located at the air inlet is rotatably connected with a locking plate used for passing a certain dust screen, and the side wall of the locking plate can be attached to the end wall of the installation annular plate.

Through adopting above-mentioned technical scheme, rotate the locking plate, be the end wall laminating of locking plate and installation crown plate to the locking plate cooperates with the butt crown plate, presss from both sides tight installation crown plate, and then realizes the fixed of dust screen. When the dust screen is disassembled, the dust screen can be easily taken out only by rotating the locking plate and removing the limitation of the locking plate on the installation ring plate, and the dust screen disassembling device is simple in structure and convenient to operate.

Optionally, a sliding groove is formed in the side wall of the locking plate facing the direction of the extending ring plate along the thickness direction of the locking plate, and a sliding column is connected in the sliding groove in a sliding manner; the sliding column is characterized in that the end wall of the sliding column, which deviates from the direction of the bottom wall of the sliding groove, is of a hemispherical shape, the end wall of the mounting ring plate is provided with a hemispherical groove for inserting one end of the sliding column, and a first elastic piece for driving the sliding column to move in the outer direction of the sliding groove is arranged in the sliding groove and between the bottom wall of the sliding groove and the sliding column.

Through adopting above-mentioned technical scheme, rotate the locking plate, the traveller inserts the hemisphere inslot under first elastic component effect, realizes the fixed to the locking plate, prevents that locking plate and installation crown plate from breaking away from. When the dustproof net is disassembled, the locking plate is rotated, the hemispherical groove generates acting force on the hemispherical end wall of the sliding column, the sliding column is driven to move towards the inner direction of the sliding groove and completely separate from the hemispherical groove, and therefore the locking plate and the mounting ring plate are separated, and the operation is simple and rapid.

Optionally, the extension ring plate is located the end wall of air intake and is located air intake both sides and detachably connects with mounting substrate respectively, two mounting substrate length direction's both ends difference fixedly connected with rotates the seat, the both ends of lead screw rotate with rotating the seat respectively and be connected, driving motor is fixed with mounting substrate.

Through adopting above-mentioned technical scheme, lead screw and driving motor pass through mounting substrate and are connected with extending the crown plate, lead to many dismouting mounting substrate, realize quick dismantlement and the installation of lead screw, driving motor and extension crown plate. The screw rod, the driving motor and the cleaning brush are removed, so that the size of the heat exchanger is reduced, the space is saved, and the heat exchanger is convenient to transport and store.

Optionally, a plurality of insertion blocks are arranged on the side wall of the mounting substrate facing the direction of the extension ring plate, and a plurality of insertion holes for the insertion blocks to insert are formed in the extension ring plate in a penetrating manner; extend the end wall that the crown plate deviates from the mounting substrate direction and be close to the jack position and all be provided with the fixed block, the fixed block runs through along extending crown plate width direction and has seted up the slide opening, the slide bar is worn to be equipped with, and is a plurality of to the slide opening internal slipping the lateral wall of inserted block is seted up and is supplied slide bar one end male slot, slide bar other end protrusion in the end wall of fixed block.

Through adopting above-mentioned technical scheme, the inserted block inserts in the jack to through slide bar and slot cooperation, realize mounting substrate's fixed, simple structure, convenient operation.

Optionally, the end wall that is located the slide bar that extends the ring plate with one side is kept away from the inserted block direction is connected with the action bars jointly, extend the ring plate and offer the groove of stepping down that is used for pulling the action bars.

Through adopting above-mentioned technical scheme, when the mounting substrate need be dismantled, the staff is through stepping down the groove pulling action bars, realizes that the slide bar that will be located same side simultaneously breaks away from with the slot, and efficiency is higher, and it is more convenient to operate.

Optionally, a second elastic element for driving the sliding rod to move towards the direction of the insertion block is arranged between the operating rod and the fixed block.

Through adopting above-mentioned technical scheme, make the one end of slide bar offset with the diapire of slot through the second elastic component, prevent that slide bar and slot from breaking away from.

Optionally, an end wall of one end of the sliding rod insertion slot is obliquely provided with a guide surface.

Through adopting above-mentioned technical scheme, in the mounting panel installation, the end wall and the spigot of inserted block offset, continue to remove the mounting panel, and the inserted block produces the effort to the slide bar through the spigot to with the slide bar to driving away the inserted block direction dorsad, after the slot aligns with the slide bar position, the slide bar inserts the slot under the effect of second elastic component, never realizes the fixed of mounting panel, easy operation, it is convenient.

Optionally, the extending ring plate is located on the end wall of the air inlet and is provided with a dust collecting box for collecting dust and other impurities brushed off by the cleaning brush at a position below the air inlet.

Through adopting above-mentioned technical scheme, debris such as dust that the cleaning brush brushed away are collected through the dust collection box to regularly clear up, prevent that dust etc. from raising, be infected with the dust screen once more, are favorable to keeping the cleanness of dust screen.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the dust screen is arranged at the air inlet of the heat exchanger, so that dust and other impurities entering the frame are effectively reduced, the cleanness of the radiating fins is ensured, and the influence of the dust and other impurities on the heat exchange efficiency of the heat exchanger is further reduced;

2. the cleaning brush, the driving motor and the screw rod are detachably connected with the extension ring plate, so that the heat exchanger is convenient to transport and store;

3. the dust collecting box can collect dust and other sundries to avoid contaminating the dust screen again.

Drawings

Fig. 1 is a schematic view of the overall structure of the heat exchanger with the self-cleaning function according to the embodiment.

Fig. 2 is an exploded view of the present embodiment with the mounting substrate removed.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic sectional view of a connection structure of the locking plate and the mounting ring plate.

Fig. 5 is an exploded view for showing a connection structure of the mounting substrate and the extension ring plate.

FIG. 6 is a schematic sectional view for showing the mating relationship of the slide bar and the slot.

Description of reference numerals: 1. a frame body; 11. an extension ring plate; 111. a jack; 112. a yielding groove; 12. a heat dissipating fin; 13. a heat exchange circulation pipe; 14. abutting against the ring plate; 15. iron sheets; 2. a dust screen; 21. installing a ring plate; 211. a hemispherical groove; 3. a locking plate; 31. a chute; 311. a traveler; 312. a first elastic member; 4. a mounting substrate; 41. a rotating seat; 42. a screw rod; 421. mounting blocks; 43. a drive motor; 44. inserting a block; 441. a slot; 5. a cleaning brush; 6. a dust collecting box; 61. a magnet; 7. a fixed block; 71. a slide hole; 72. a slide bar; 721. a limiting bump; 722. a guide surface; 73. a second elastic member; 8. an operating lever.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses take self-cleaning function's heat exchanger. Referring to fig. 1 and 2, the heat exchanger with the self-cleaning function includes a frame 1, the frame 1 is a barrel structure penetrating left and right, end walls at two ends of the frame 1 are bent outwards and integrally formed with an extending ring plate 11, and an opening at one side of the frame 1 is an air inlet. The frame body 1 is positioned on the end wall of the air inlet. The frame 1 is provided with heat radiating fins 12 and a heat exchange circulation pipe 13. The frame body 1 is internally provided with a dust screen 2 in a detachable mode and is positioned at the air inlet, and the dust screen 2 can be made of nylon materials and is provided with a filter screen with a concave-convex honeycomb structure.

Referring to fig. 1 and 2, the inner side wall of the frame body 1 is close to the air inlet, an abutting ring plate 14 is welded and fixed along the circumferential direction of the air inlet, the abutting ring plate 14 and the inner side wall of the frame body 1 form a placing groove in which the dust screen 2 can be placed, and an installation ring plate 21 is fixed on the periphery of the dust screen 2 through screws. The end wall of the extension ring plate 11 at the air inlet is rotatably connected with a locking plate 3 for fixing the dust screen 2. When installing dust screen 2, at first put into dust screen 2, make the end wall of installation crown plate 21 and the end wall butt of 14 orientation of air intake of butt crown plate, then rotate locking plate 3, make the lateral wall of locking plate 3 and the end wall laminating that installation crown plate 21 deviates from 14 orientations of butt crown plate, locking plate 3 cooperates with fixed dust screen 2 with butt crown plate 14.

Referring to fig. 2, the end wall of the extension ring plate 11 at the air inlet is detachably connected to the mounting substrates 4, the two ends of the two mounting substrates 4 in the length direction are welded and fixed with rotating seats 41, bearing holes are formed in the side walls of the rotating seats 41, and bearings are mounted in the bearing holes. The mounting substrate 4 is rotatably provided with a screw rod 42, and two ends of the screw rod 42 are rotatably connected with the rotating seats 41 through bearings respectively. One end of the mounting substrate 4 is fixedly connected with a driving motor 43 through a screw, and a driving shaft of the driving motor 43 is coaxially fixed with the screw rod 42 so as to drive the screw rod 42 to rotate.

Referring to fig. 2, the two screw rods 42 are respectively in threaded connection with mounting blocks 421, the cleaning brush 5 is fixedly connected between the two mounting blocks 421, two ends of the cleaning brush 5 in the length direction are respectively fixedly connected with the mounting blocks 421 through screws, and bristles of the cleaning brush 5 face the direction of the dust screen 2 and are in contact with the dust screen 2.

Referring to fig. 1 and 2, when the dust screen 2 needs to be cleaned, the driving motor 43 is started at regular time or the driving motor 43 is started manually through program setting, and the driving motor 43 is controlled to rotate forward or reversely by matching with the travel switch, so that the screw rods 42 rotate forward or reversely, and further the cleaning brush 5 is driven to slide along the length direction or the width direction of the extension ring plate, so that the dust screen 2 is cleaned.

Referring to fig. 2, the end wall of the extending ring plate at the air inlet is provided with a dust collecting box 6 with an upper end opening, the side wall of the dust collecting box 6 facing the direction of the extending ring plate is fixedly bonded with a magnet 61, and the end wall of the extending ring plate at the lower part of the air inlet is fixedly bonded with an iron sheet 15. Magnet 61 attracts with iron sheet 15 magnetism mutually, realizes the dismantlement of dust collection box 6 and extension ring board and is connected, conveniently to the clearance of debris such as dust in the dust collection box 6.

Referring to fig. 3 and 4, the side wall of the locking plate 3 facing the direction of the extending ring plate is provided with a sliding groove 31 along the thickness direction of the locking plate, a sliding column 311 is connected in the sliding groove 31 in a sliding manner, the cross section of the sliding groove 31 is circular, and the sliding column 311 is matched with the sliding groove 31. The end wall of the sliding column 311 departing from the bottom wall direction of the sliding chute 31 is hemispherical, and the end wall of the mounting ring plate 21 is provided with a hemispherical groove 211. When the locking plate 3 rotates to a state where its side wall is attached to the mounting ring plate 21, the hemispherical end of the sliding column 311 can be inserted into the hemispherical groove 211.

Referring to fig. 4, a first elastic member 312 is disposed in the sliding slot 31 and between the bottom wall of the sliding slot 31 and the sliding column 311, the first elastic member 312 may be a rubber pad or a spring, and in the embodiment, the first elastic member 312 is a spring. The two ends of the spring are respectively fixed with the bottom wall of the sliding groove 31 and the end wall of the sliding column 311 through bonding, so that the sliding column 311 is driven to move towards the outer side of the sliding groove 31 and tightly abutted against the sliding column, the sliding column 311 is prevented from being separated from the hemispherical groove 211, the position of the locking plate 3 is guaranteed to be fixed, and the dustproof net 2 is further fixed.

Referring to fig. 5, the side wall of the mounting substrate 4 facing the direction of the extension ring plate 11 is provided with a plurality of insertion blocks 44, the end wall of the extension ring plate 11 penetrates through the insertion holes 111, the insertion blocks 44 are inserted into the insertion holes 111, and after the side wall of the mounting substrate 4 is attached to the end wall of the extension ring plate 11, the end wall of the insertion block 44 away from the direction of the mounting substrate 4 protrudes out of the end wall of the extension plate.

Referring to fig. 5 and 6, a slot 441 is formed in a side wall of the insertion block 44 protruding out of the end wall portion of the extension ring plate 11, the end wall of the extension ring plate 11 facing away from the mounting substrate 4 and close to the insertion hole 111 are fixed with the fixing block 7 by welding, and the end wall of the fixing block 7 in the length direction faces the slot 441. The fixed block 7 is provided with a sliding hole 71 along the width direction of the extension annular plate 11, and a sliding rod 72 is connected in the sliding hole 71 in a sliding manner. The cross section of the sliding hole 71 is rectangular, and the sliding rod 72 is matched with the sliding hole 71. One end of the sliding rod 72 is inserted into the insertion groove 441, and the other end of the sliding rod 72 protrudes out of the end wall of the fixed block 7.

Referring to fig. 5 and 6, the sliding rods 72 located on the same side of the extending ring plate 11 and the end walls far away from the direction of the insertion block 44 are connected with the operating rod 8, and the end walls of the extending ring plate 11 are provided with the abdicating grooves 112 for pulling the operating rod 8. A second elastic member 73 is arranged between the operating rod 8 and the fixed block 7, the second elastic member 73 may be an elastic rope or a spring, in this embodiment, the second elastic member 73 is a spring, the spring is sleeved on the sliding rod 72 and located between the operating rod 8 and the fixed block 7, and two ends of the spring are respectively welded and fixed with the side wall of the operating rod 8 and the end wall of the fixed block 7 to drive the sliding to move towards the direction of the insertion block 44. The slide bar 72 is located between the operating rod 8 and the fixed block 7 and is close to the side wall of the fixed block 7, and a limit bump 721 is welded, when the spring does not receive other external force and only has spring tension effect, the side wall of the limit bump 721 facing the direction of the fixed block 7 is abutted against the end wall of the fixed block 7 to limit the slide bar 72 to slide towards the direction of the insert block 44, and the spring is kept in a stretched state all the time.

Referring to fig. 5 and 6, an end wall of one end of the slide rod 72 inserted into the insertion groove 441 is obliquely provided with a guide surface 722. During the installation of the mounting substrate 4, the insertion block 44 abuts against the guide surface 722 and drives the sliding rod 72 to slide in the direction away from the insertion block 44 until the end wall of the sliding rod 72 abuts against the side wall of the insertion block 44, when the mounting substrate 4 is installed in place, the sliding rod 72 is aligned with the slot 441, and the sliding rod 72 is inserted into the slot 441 under the action of the second elastic member 73. When the mounting substrate 4 needs to be detached, the operating rod 8 is pulled in the direction away from the insertion block 44, so that the sliding rod 72 is separated from the slot 441, the insertion block 44 is separated from the limit of the sliding rod 72, and the mounting substrate 4 can be detached.

The implementation principle of the heat exchanger with the self-cleaning function in the embodiment of the application is as follows:

cold fluid or hot fluid is introduced into the heat exchange circulating pipe 13, the cold fluid or the hot fluid performs heat exchange with air in the frame body 1 through the radiating fins 12, the air enters the frame body 1 from one side of the air inlet of the frame body 1 through the dustproof net 2, and after energy exchange is performed with the cold fluid or the hot fluid in the heat exchange circulating pipe 13 through the radiating fins 12, the air is discharged from the air outlet of the frame body 1 through the fan, and air circulation is formed. In the working process of the heat exchanger, the driving motor 43 can be set by a program or manually started, so that the dust screen 2 can be cleaned in a reciprocating manner by the cleaning brush 5, the dust screen 2 is kept clean, the smoothness of air circulation in the heat exchanger frame body 1 is ensured, and dust and other impurities are prevented from being attached to the surface of the radiating fin 12 to influence the heat exchange efficiency of the heat exchanger. The dust that brushes off, through collection and the regular clearance of dust collection box 6, guarantee the inside clean and tidy of equipment, prevent that dust etc. from raising, be infected with dust screen 2 once more.

This application embodiment is through setting up dust screen 2, and the radiating fin 12 that has significantly reduced is infected with debris such as dust, has reduced the influence of dust etc. to heat exchanger heat exchange efficiency. Sundries such as dust and the like attached to the dust screen 2 are scrubbed through the cleaning brush 5, smoothness of air flowing in the heat exchanger is guaranteed, and influences of the sundries such as the dust and the like on heat exchange efficiency of the heat exchanger are further reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A heat exchanger with a self-cleaning function comprises a frame body (1), wherein end walls at two ends of the frame body (1) are outwards bent to form extension ring plates (11), and an opening at one side of the frame body (1) is an air inlet; the method is characterized in that: a dustproof net (2) is detachably arranged in the frame body (1) and at the position of the air inlet; the end wall of the extending ring plate (11) at the position of the air inlet is provided with screw rods (42) which are respectively and rotatably connected with the two sides of the air inlet, the two screw rods (42) are respectively in threaded connection with mounting blocks (421), and a cleaning brush (5) for cleaning the dust screen (2) is fixedly connected between the two mounting blocks (421); the extension ring plate (11) is also provided with a driving motor (43) for driving the screw rod (42) to rotate.

2. The heat exchanger with self-cleaning function according to claim 1, wherein: the inner side wall of the frame body (1) is provided with a butt ring plate (14) close to the air inlet along the circumferential direction of the air inlet, the butt ring plate (14) and the inner side wall of the frame body (1) form a placing groove capable of placing a dust screen (2), the periphery of the dust screen (2) is provided with an installation ring plate (21), and the end wall of the installation ring plate (21) is in butt joint with the end wall of the butt ring plate (14) facing the air inlet; the end wall of the extension annular plate (11) at the air inlet position is rotatably connected with a locking plate (3) for fixing the dust screen (2), and the side wall of the locking plate (3) can be attached to the end wall of the installation annular plate (21).

3. The heat exchanger with self-cleaning function according to claim 2, wherein: a sliding groove (31) is formed in the side wall, facing the direction of the extending ring plate (11), of the locking plate (3) along the thickness direction of the locking plate, and a sliding column (311) is connected in the sliding groove (31) in a sliding mode; the end wall of the sliding column (311) departing from the bottom wall direction of the sliding groove (31) is hemispherical, and the end wall of the mounting ring plate (21) is provided with a hemispherical groove (211) into which one end of the sliding column (311) is inserted; a first elastic piece (312) for driving the sliding column (311) to move towards the outer direction of the sliding chute (31) is arranged in the sliding chute (31) and between the bottom wall of the sliding chute (31) and the sliding column (311).

4. The heat exchanger with self-cleaning function according to claim 1, wherein: extend ring board (11) and be located the end wall of air intake department and be located air intake both sides and detachably connect with mounting substrate (4), two mounting substrate (4) length direction's both ends respectively fixedly connected with rotate seat (41), the both ends of lead screw (42) rotate with rotating seat (41) respectively and are connected, driving motor (43) are fixed with mounting substrate (4).

5. The heat exchanger with self-cleaning function according to claim 4, wherein: the side wall of the mounting substrate (4) facing the direction of the extension ring plate (11) is provided with a plurality of insertion blocks (44), and the extension ring plate (11) is provided with a plurality of insertion holes (111) for the insertion blocks (44) to be inserted; extend ring plate (11) and deviate from the end wall of mounting substrate (4) direction and be close to jack (111) position and all be provided with fixed block (7), fixed block (7) are run through along extending ring plate (11) width direction and have been seted up slide opening (71), slide opening (71) internal slipping is worn to be equipped with slide bar (72), and is a plurality of the lateral wall of inserted block (44) is seted up and is supplied slide bar (72) one end to insert slot (441), slide bar (72) other end protrusion in the end wall of fixed block (7).

6. The heat exchanger with self-cleaning function according to claim 5, wherein: the end wall of the slide rod (72) which is positioned at the same side of the extension ring plate (11) and is far away from the direction of the insert block (44) is jointly connected with an operating rod (8), and the extension ring plate (11) is provided with an abdicating groove (112) for pulling the operating rod (8).

7. The heat exchanger with self-cleaning function according to claim 6, wherein: and a second elastic piece (73) for driving the sliding rod (72) to move towards the direction of the inserting block (44) is arranged between the operating rod (8) and the fixed block (7).

8. The heat exchanger with self-cleaning function according to claim 7, wherein: the end wall of one end of the sliding rod (72) inserted into the insertion groove (441) is obliquely provided with a guide surface (722).

9. The heat exchanger with self-cleaning function according to claim 1, wherein: the extension annular plate is positioned on the end wall of the air inlet and is provided with a dust collecting box (6) for collecting dust and other impurities brushed off by the cleaning brush (5) at the position below the air inlet.