CN112629046A

CN112629046A - Solar water heater with automatic monitoring and heating heat preservation functions

Info

Publication number: CN112629046A
Application number: CN202011495167.1A
Authority: CN
Inventors: 唐相林; 韩晓莹; 唐旭
Original assignee: Yunnan Dingre New Energy Technology Co ltd
Current assignee: Yunnan Dingre New Energy Technology Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-04-09

Abstract

The invention discloses a solar water heater with automatic monitoring, heating and heat preservation functions, which comprises a base, a double-shaft motor, heat preservation sponge, a cleaning rod, a second reset spring and a bearing plate, wherein the double-shaft motor is embedded and installed on the inner side of the bottom of the base, the output end of the double-shaft motor is connected with a threaded rod, a movable block is sleeved on the threaded rod, the top of the movable block is hinged with a connecting rod, a main water tank is connected with an overflow tank through a connecting pipe, a convex block is fixed on the inner wall of the connecting ring, a torsion spring is installed at the bottom of the shaft rod, and the front side of the main water tank is connected. This solar water heater with automatic monitoring and heating heat preservation function can heat the heat preservation to the water in the water heater water tank, and can control water supply system, can adjust and clear up the surface of thermal-collecting tube to light receiving angle simultaneously.

Description

Solar water heater with automatic monitoring and heating heat preservation functions

Technical Field

The invention relates to the technical field of solar water heaters, in particular to a solar water heater with automatic monitoring, heating and heat preservation functions.

Background

The solar water heater mainly converts solar energy into heat energy, heats water from low temperature to high temperature, does not need to consume coal, other energy sources and the like, is low in installation and use cost and is widely used, so as to meet the use requirement of hot water in life and production of people, the solar water heater is divided into a vacuum tube type solar water heater and a flat plate type solar water heater according to the structural form, the vacuum tube type solar water heater is mainly used in the current market, the vacuum tube type solar water heater mainly comprises heat collecting tubes, a water storage tank, a support and other related accessories, the solar energy is converted into the heat energy, the heat collecting tubes mainly depend on the heat collecting tubes, and the heat collecting tubes utilize the principle that hot water floats upwards and cold water sinks, so that the water generates microcirculation to achieve the required hot water, however:

the existing solar water heater has high dependence on solar energy, when the solar energy is insufficient, because the water tank of the existing solar water heater contains more water, the water cannot be heated to the required temperature, so that the bathing is not hot and usable, the water in the water tank of the water heater is not convenient to heat and preserve heat, and when people of the existing solar water heater supply water, a user cannot obtain a full water signal after the water in the water tank is full, so that a large amount of water overflows from the solar water heater, the waste of water resources is caused, the control on a water supply system is not convenient, meanwhile, the existing solar water heater is generally placed outdoors for use, the irradiation angle of light is changed, the angle of received light is required to be adjusted, the surface of a heat collecting tube is required to be cleaned when the existing solar water heater is placed outdoors, and bird excrement or other impurities are prevented from being adhered to the existing solar water heater, it is inconvenient to adjust the light receiving angle and clean the surface of the heat collecting tube.

In order to solve the problems, innovative design is urgently needed on the basis of the original solar water heater.

Disclosure of Invention

The invention aims to provide a solar water heater with automatic monitoring and heating and heat preservation functions, and aims to solve the problems that the existing solar water heater is inconvenient to heat and preserve heat of water in a water tank of the water heater, control a water supply system, adjust a light receiving angle and clean the surfaces of heat collecting pipes.

In order to achieve the purpose, the invention provides the following technical scheme: a solar water heater with automatic monitoring, heating and heat preservation functions comprises a base, a double-shaft motor, a heat preservation sponge, a cleaning rod, a second reset spring and a bearing plate, wherein the double-shaft motor is embedded and installed on the inner side of the bottom of the base, the output end of the double-shaft motor is connected with a threaded rod, the threaded rod is connected in a movable groove in a shaft mode, the movable groove is formed in the top of the base, a movable block is sleeved on the threaded rod, the top of the movable block is hinged with a connecting rod, a water heater support is connected to the top of the connecting rod, a main water tank is installed on the top of the water heater support and is connected with an overflow tank through a connecting pipe, the overflow tank is installed on the front side of the top of the rear side of the water heater support, a connecting ring is fixed on the right side of, the middle part of the connecting ring is connected with a shaft lever, the shaft lever is connected with the middle part of the sliding groove in a shaft manner, a bump is fixed on the inner wall of the connecting ring and connected with a clamping groove, the clamping groove is formed in the outer side surface of the shaft lever, the bottom of the overflow tank is connected with the water heater support through a first return spring, the bottom of the shaft lever is connected with a partition board, the partition board is connected with a water inlet valve, the water inlet valve is positioned in the middle of the water inlet pipe, the water inlet pipe is connected with the water heater support in a penetrating manner, the bottom of the shaft lever is provided with a torsion spring, the bottom of the torsion spring is provided with a sealing bearing, the sealing bearing is positioned at the top of the water inlet valve, the right side of the main water tank is connected with a communicating pipeline, the middle of, simultaneously electrical heating water tank's inboard bottom is installed automatically controlled heating device, there is the thermal-collecting tube front side of main water tank through connection through the hose, and the bottom of thermal-collecting tube is linked together through hose and expansion tank to expansion tank's internally mounted has the active carbon filter screen, U type post is installed at the left side top of base, and the inboard mid-mounting of U type post has the telescopic link to the dogtooth is installed in the outside of telescopic link, the outside of dogtooth is connected with the gear, and gear mounting in the top of U type post, and the axle head of gear is around being equipped with the stay cord, the board is accepted in the top of telescopic link is installed, and the top of accepting the board is fixed with the.

Preferably, the threaded rod is designed to be of a reverse threaded structure, the moving block sleeved on the threaded rod is attached to the moving groove, and the moving block forms a linear moving structure with the water heater support through the connecting rod.

Preferably, heat preservation sponge is filled between the inner shell and the outer shell of the main water tank, the inner wall of the main water tank is provided with the ozone generator and the liquid magnetic pipe, and the ozone generator and the liquid magnetic pipe are distributed in a staggered mode.

Preferably, the connecting ring and the bump are respectively in sliding connection with the sliding groove and the clamping groove, and the sliding groove is designed to be of a spiral structure.

Preferably, the end part of the partition plate is designed into an arc-shaped structure, the area of the partition plate is equal to that of the water inlet valve, and the partition plate and the water inlet valve form a rotating structure through the shaft rod and the torsion spring.

Preferably, the convex teeth are distributed on the outer side of the telescopic rod at equal intervals, the convex teeth are meshed with the gears, and the gears are symmetrically distributed on two sides of the telescopic rod.

Preferably, the end of the pull rope is connected with the cleaning rod, the bottom of the cleaning rod is connected with the movable groove through a second return spring, and the movable groove is formed in the top of the bearing plate.

Preferably, the cleaning rod is designed to be of a wavy structure, the bottom of the cleaning rod is attached to the outer side of the heat collecting pipe, and the cleaning rod forms a relative sliding structure with the movable groove through the second return spring.

Compared with the prior art, the invention has the beneficial effects that: the solar water heater with the functions of automatic monitoring, heating and heat preservation;

1. the heat-preservation sponge can preserve heat of water in the water tank of the water heater through the heat-preservation sponge, the ozone generator, the liquid magnetic tube, the electric heating water tank, the electric control heating device and the temperature sensor, so that the water can be conveniently used next time, the ozone generator can sterilize and disinfect the water in the water tank, the water is healthier to use, and the liquid magnetic tube can adsorb sodium and magnesium ions in the water, so that scale is prevented from being generated;

2. through the connecting ring, the sliding groove, the shaft lever, the bump, the clamping groove, the first return spring, the partition plate and the torsion spring, when the overflow tank drives the connecting ring to slide in the sliding groove, the first return spring is compressed, the shaft lever in the middle of the sliding groove is driven to rotate by the concave-convex matching of the bump and the clamping groove, and the torsion spring is enabled to rotate reversely after the shaft lever rotates, so that the partition plate is driven to rotate in the water inlet valve, and the water feeding amount is controlled;

3. through the arrangement of the threaded rod, the moving groove, the moving block, the connecting rod and the water heater support, the moving block can be driven to move relatively in the moving groove after the threaded rod rotates, and the water heater support can be driven to move up and down through the connecting rod after the moving block moves, so that the angle of the heat collecting pipe for receiving light rays can be adjusted;

4. through telescopic link, dogtooth, gear, stay cord, cleaning rod, second reset spring and the movable groove that sets up for after the telescopic link activity, the dogtooth of its outside will with gear intermeshing, and then drive the gear and rotate, will tighten up the stay cord after the gear rotation, and then drive cleaning rod and take place relative movement through second reset spring in the movable groove, and then clear up the surface of thermal-collecting tube.

Drawings

FIG. 1 is a schematic view of an overall front cross-sectional structure of the present invention;

FIG. 2 is a schematic side view of the water heater bracket of the present invention;

FIG. 3 is a rear view of the card slot of the present invention;

FIG. 4 is a top view of the attachment ring of FIG. 2 in accordance with the present invention;

FIG. 5 is a schematic top view of the partition of FIG. 2 according to the present invention;

FIG. 6 is a side view of the cleaning rod of the present invention;

FIG. 7 is a schematic top view of the U-shaped pillar of the present invention.

In the figure: 1. a base; 2. a double-shaft motor; 3. a threaded rod; 4. a moving groove; 5. a moving block; 6. a connecting rod; 7. a water heater bracket; 8. a main water tank; 9. heat-insulating sponge; 10. an ozone generator; 11. a liquid magnetic tube; 12. a connecting pipe; 13. an overflow tank; 14. a connecting ring; 15. a chute; 16. a shaft lever; 17. a bump; 18. a card slot; 19. a first return spring; 20. a partition plate; 21. a water inlet valve; 22. a water inlet pipe; 23. a torsion spring; 24. sealing the bearing; 25. a communicating pipeline; 26. a temperature sensor; 27. an electrically heated water tank; 28. an electrically controlled heating device; 29. a hose; 30. a heat collecting pipe; 31. an auxiliary water tank; 32. an active carbon filter screen; 33. a U-shaped column; 34. a telescopic rod; 35. a convex tooth; 36. a gear; 37. pulling a rope; 38. a cleaning rod; 39. a second return spring; 40. a movable groove; 41. a bearing plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a solar water heater with automatic monitoring, heating and heat preservation functions comprises a base 1, a double-shaft motor 2, a threaded rod 3, a moving groove 4, a moving block 5, a connecting rod 6, a water heater support 7, a main water tank 8, heat preservation sponge 9, an ozone generator 10, a liquid magnetic tube 11, a connecting tube 12, an overflow tank 13, a connecting ring 14, a sliding groove 15, a shaft rod 16, a bump 17, a clamping groove 18, a first return spring 19, a partition plate 20, a water inlet valve 21, a water inlet tube 22, a torsion spring 23, a sealing bearing 24, a communicating pipeline 25, a temperature sensor 26, an electric heating water tank 27, an electric control heating device 28, a hose 29, a heat collecting tube 30, an auxiliary water tank 31, an active carbon filter screen 32, a U-shaped column 33, an expansion rod 34, a convex tooth 35, a gear 36, a pull rope 37, a cleaning rod 38, a second return spring 39, a moving groove 40 and a bearing plate, the output end of the double-shaft motor 2 is connected with a threaded rod 3, the threaded rod 3 is connected in a shaft in a movable groove 4, the movable groove 4 is arranged at the top of the base 1, a movable block 5 is sleeved on the threaded rod 3, the top of the movable block 5 is hinged with a connecting rod 6, the top of the connecting rod 6 is crossed with a water heater support 7, a main water tank 8 is arranged at the top of the water heater support 7, the main water tank 8 is connected with an overflow tank 13 through a connecting pipe 12, the overflow tank 13 is arranged at the front side of the top of the rear side of the water heater support 7, a connecting ring 14 is fixed at the right side of the overflow tank 13, the connecting ring 14 is connected in a sliding groove 15, the sliding groove 15 is arranged on the left end face of the water heater support 7, the middle part of the connecting ring 14 is connected with a shaft 16, the shaft 16 is connected, the clamping groove 18 is arranged on the outer side surface of the shaft lever 16, the bottom of the overflow tank 13 is connected with the water heater bracket 7 through a first return spring 19, the bottom of the shaft lever 16 is connected with a partition plate 20, the partition plate 20 is connected in a water inlet valve 21, the water inlet valve 21 is positioned in the middle of a water inlet pipe 22, the water inlet pipe 22 is connected in the water heater bracket 7 in a penetrating manner, the bottom of the shaft lever 16 is provided with a torsion spring 23, the bottom of the torsion spring 23 is provided with a sealing bearing 24, the sealing bearing 24 is positioned at the top of the water inlet valve 21, the right side of the main water tank 8 is connected with a communicating pipeline 25, the middle of the communicating pipeline 25 is provided with a temperature sensor 26, the bottom of the communicating pipeline 25 is connected with an electric heating water tank 27, the electric heating water tank 27 is arranged at the top of the base 1, the bottom of the inner, the bottom of the heat collecting pipe 30 is communicated with the auxiliary water tank 31 through a hose 29, an activated carbon filter screen 32 is installed inside the auxiliary water tank 31, a U-shaped column 33 is installed at the top of the left side of the base 1, an expansion rod 34 is installed in the middle of the inner side of the U-shaped column 33, a convex tooth 35 is installed on the outer side of the expansion rod 34, a gear 36 is connected to the outer side of the convex tooth 35, the gear 36 is installed at the top of the U-shaped column 33, a pull rope 37 is wound around the shaft end of the gear 36, a bearing plate 41 is installed at the top of the expansion rod 34, and the heat collecting pipe 30;

the threaded rod 3 is designed to be of a reverse threaded structure, the moving block 5 sleeved on the threaded rod 3 is attached to the moving groove 4, and the moving block 5 forms a linear moving structure with the water heater support 7 through the connecting rod 6, so that the threaded rod 3 can drive the moving block 5 to move relatively in the moving groove 4 after rotating, the moving block 5 cannot deviate, and the moving block 5 drives the water heater support 7 to move up and down through the connecting rod 6;

heat preservation sponge 9 is filled between the inner shell and the outer shell of the main water tank 8, an ozone generator 10 and a liquid magnetic pipe 11 are installed on the inner wall of the main water tank 8, and the ozone generator 10 and the liquid magnetic pipe 11 are distributed in a staggered mode, so that the heat preservation sponge 9 filled in the main water tank 8 can carry out heat preservation treatment on water in the water heater, and the ozone generator 10 and the liquid magnetic pipe 11 can carry out sterilization, disinfection and scale prevention treatment on the water;

the connecting ring 14 and the bump 17 are respectively in sliding connection with the sliding groove 15 and the clamping groove 18, and the sliding groove 15 is designed to be in a spiral structure, so that the connecting ring 14 and the bump 17 can more stably slide between the sliding groove 15 and the clamping groove 18, and the sliding groove 15 in the spiral structure can drive the shaft lever 16 to rotate;

the end part of the partition plate 20 is designed to be of an arc structure, the area of the partition plate 20 is equal to that of the water inlet valve 21, and the partition plate 20 forms a rotating structure with the water inlet valve 21 through the shaft lever 16 and the torsion spring 23, so that the shaft lever 16 can drive the partition plate 20 to rotate in the water inlet valve 21 through the torsion spring 23 after rotating, and the partition plate 20 can open and close the water inlet valve 21;

the convex teeth 35 are distributed on the outer side of the telescopic rod 34 at equal intervals, the convex teeth 35 are meshed with the gear 36, and the gear 36 is symmetrically distributed on two sides of the telescopic rod 34, so that after the telescopic rod 34 moves, the convex teeth 35 on the outer side of the telescopic rod are meshed with the gear 36, and the gear 36 is driven to rotate;

the end part of the pull rope 37 is connected with the cleaning rod 38, the bottom of the cleaning rod 38 is connected into the movable groove 40 through the second return spring 39, and the movable groove 40 is opened at the top of the bearing plate 41, so that the pull rope 37 is tightened after the gear 36 rotates, and the pull rope 37 drives the cleaning rod 38 to slide in the movable groove 40;

the cleaning rod 38 is designed to be of a wavy structure, the bottom of the cleaning rod 38 is attached to the outer side of the heat collecting tube 30, and the cleaning rod 38 forms a relative sliding structure through the second return spring 39 and the movable groove 40, so that the cleaning rod 38 can be attached to the outer side of the heat collecting tube 30 better, and the cleaning rod is cleaned more cleanly.

The working principle is as follows: when the solar water heater with the automatic monitoring and heating heat preservation functions is used, as shown in fig. 1-5, firstly, the water inlet pipe 22 is externally connected with a water source, when water is supplied, water enters the main water tank 8 from the water inlet pipe 22 through the water inlet valve 21, after the main water tank 8 is filled with water, redundant water enters the overflow tank 13 from the connecting pipe 12, the overflow tank 13 moves downwards under the action of the gravity of the water to compress the first return spring 19, the connecting ring 14 arranged on the right side of the overflow tank 13 moves downwards in the sliding groove 15 in the downward moving process, the projection 17 arranged on the inner wall of the connecting ring 14 pushes the shaft lever 16 to rotate in the clamping groove 18, the torsion spring 23 rotates reversely after the shaft lever 16 rotates to drive the partition plate 20 to rotate in the water inlet valve 21, because the area of the partition plate 20 is equal to the inner area of the water inlet valve 21, the partition board 20 can block the water inlet valve 21, so that the water injection is cut off, the overflow phenomenon caused by the full water is prevented, and the waste of water resources is further caused, the heat preservation sponge 9 between the inner shell and the outer shell of the main water tank 8 can preserve heat of the water in the main water tank 8, the ozone generator 10 and the liquid magnetic tube 11 can sterilize, disinfect and prevent scale of the water in the main water tank 8, the temperature sensor 26 arranged on the communication pipeline 25 can detect the temperature of the water in the main water tank 8, when the water temperature is low, the electric control heating device 28 in the electric heating water tank 27 can heat the water, and further the water in the main water tank 8 can preserve heat and heat;

as shown in fig. 1 and 6-7, when the external illumination angle changes, the dual-axis motor 2 is started, the dual-axis motor 2 drives the threaded rod 3 to rotate, the threaded rod 3 drives the moving block 5 to move relatively in the moving groove 4 after rotating, and then the connecting rod 6 drives the water heater bracket 7 to move linearly up and down, so as to adjust the angle of the heat collecting tube 30 for receiving light, the flexible tube 29 is stretched to drive the heat collecting tube 30 to move up, the telescopic rod 34 extends after the heat collecting tube 30 moves up, the convex teeth 35 on the outer side of the telescopic rod 34 extends out are engaged with the gear 36, the gear 36 rotates, the gear 36 tightens the pull rope 37, the pull rope 37 drives the cleaning rod 38 to move relatively in the moving groove 40 to compress the second return spring 39, so that the cleaning rod 38 cleans the surface of the heat collecting tube 30, after the water in the heat collecting pipe 30 enters the auxiliary water tank 31, the activated carbon filter screen 32 inside the auxiliary water tank 31 can perform secondary filtration on the water.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a solar water heater with automatic monitoring and heating heat preservation function, includes base (1), biax motor (2), heat preservation sponge (9), clean pole (38), second reset spring (39) and accepts board (41), its characterized in that: the water heater is characterized in that a double-shaft motor (2) is embedded in the inner side of the bottom of the base (1), the output end of the double-shaft motor (2) is connected with a threaded rod (3), the threaded rod (3) is connected in a movable groove (4) in a shaft mode, the movable groove (4) is arranged at the top of the base (1), a movable block (5) is sleeved on the threaded rod (3), the top of the movable block (5) is hinged with a connecting rod (6), the top of the connecting rod (6) is connected with a water heater support (7) in a cross mode, a main water tank (8) is arranged at the top of the water heater support (7), the main water tank (8) is connected with an overflow tank (13) through a connecting pipe (12), the overflow tank (13) is arranged on the front side of the top of the rear side of the water heater support (7), a connecting ring (14) is fixed, the chute (15) is arranged on the left end face of the water heater support (7), the middle of the connecting ring (14) is connected with the shaft lever (16), the shaft lever (16) is connected to the middle of the chute (15) in a shaft mode, a bump (17) is fixed on the inner wall of the connecting ring (14), the bump (17) is connected into a clamping groove (18), the clamping groove (18) is arranged on the outer side face of the shaft lever (16), the bottom of the overflow tank (13) is connected with the water heater support (7) through a first return spring (19), the bottom of the shaft lever (16) is connected with a partition plate (20), the partition plate (20) is connected into a water inlet valve (21), the water inlet valve (21) is located in the middle of the water inlet pipe (22), the water inlet pipe (22) is connected into the water heater support (7) in a penetrating mode, a torsion spring (23) is arranged at the bottom of the shaft lever (16), and a sealing bearing, and the sealing bearing (24) is positioned at the top of the water inlet valve (21), the right side of the main water tank (8) is connected with a communicating pipeline (25), the middle part of the communicating pipeline (25) is provided with a temperature sensor (26), the bottom of the communicating pipeline (25) is connected with an electric heating water tank (27), the electric heating water tank (27) is arranged at the top of the base (1), meanwhile, the bottom of the inner side of the electric heating water tank (27) is provided with an electric control heating device (28), the front side of the main water tank (8) is connected with a heat collecting pipe (30) in a penetrating way through a hose (29), the bottom of the heat collecting pipe (30) is communicated with an auxiliary water tank (31) through the hose (29), an active carbon filter screen (32) is arranged inside the auxiliary water tank (31), the top of the left side of the base (1) is provided with a U-shaped column (33), and the middle part, and protruding tooth (35) are installed in the outside of telescopic link (34), the outside of protruding tooth (35) is connected with gear (36), and gear (36) are installed in the top of U type post (33) to the axle head of gear (36) is around being equipped with stay cord (37), the top of telescopic link (34) is installed and is accepted board (41), and the top of accepting board (41) is fixed with thermal-collecting tube (30).

2. The solar water heater with the functions of automatic monitoring, heating and heat preservation according to claim 1 is characterized in that: the threaded rod (3) is designed to be of a reverse threaded structure, the moving block (5) sleeved on the threaded rod (3) is attached to the moving groove (4), and the moving block (5) forms a linear moving structure with the water heater support (7) through the connecting rod (6).

3. The solar water heater with the functions of automatic monitoring, heating and heat preservation according to claim 1 is characterized in that: heat preservation sponge (9) are filled between the inner shell and the outer shell of the main water tank (8), an ozone generator (10) and a liquid magnetic pipe (11) are installed on the inner wall of the main water tank (8), and the ozone generator (10) and the liquid magnetic pipe (11) are distributed in a staggered mode.

4. The solar water heater with the functions of automatic monitoring, heating and heat preservation according to claim 1 is characterized in that: the connecting ring (14) and the bump (17) are respectively in sliding connection with the sliding groove (15) and the clamping groove (18), and the sliding groove (15) is designed to be of a spiral structure.

5. The solar water heater with the functions of automatic monitoring, heating and heat preservation according to claim 1 is characterized in that: the end part of the clapboard (20) is designed into an arc-shaped structure, the area of the clapboard (20) is equal to that of the water inlet valve (21), and the clapboard (20) forms a rotating structure with the water inlet valve (21) through the shaft lever (16) and the torsion spring (23).

6. The solar water heater with the functions of automatic monitoring, heating and heat preservation according to claim 1 is characterized in that: the convex teeth (35) are distributed on the outer side of the telescopic rod (34) at equal intervals, the convex teeth (35) are meshed with the gear (36), and the gear (36) is symmetrically distributed on two sides of the telescopic rod (34).

7. The solar water heater with the functions of automatic monitoring, heating and heat preservation according to claim 1 is characterized in that: the end part of the pull rope (37) is connected with the cleaning rod (38), the bottom of the cleaning rod (38) is connected into the movable groove (40) through the second return spring (39), and the movable groove (40) is arranged at the top of the bearing plate (41).

8. The solar water heater with automatic monitoring and heating heat preservation functions as claimed in claim 7, wherein: the cleaning rod (38) is designed to be of a wavy structure, the bottom of the cleaning rod (38) is attached to the outer side of the heat collecting pipe (30), and the cleaning rod (38) forms a relative sliding structure with the movable groove (40) through a second return spring (39).