Air conditioner waste heat recycling device

Abstract

The utility model discloses an air conditioner waste heat recycling device which comprises a water tank, a heat conduction pipe is arranged in the water tank, a protective cover is fixedly installed on the top of the water tank, the inner walls of the two ends of the protective cover are rotationally connected with first screw rods, and the first screw rods are provided with cleaning mechanisms used for cleaning the heat conduction pipe. A motor is fixedly installed outside one end of the protective cover, an output shaft of the motor is coaxially connected with one end of a first screw rod, and the other end of the first screw rod extends to the outside of the protective cover. The first screw is driven by the motor, the spoiler is driven to rotate through belt transmission to improve the heat exchange efficiency of a medium in the water tank and the heat conduction pipe so as to fully recycle waste heat, the cleaning mechanism is driven to reciprocate along the axis of the screw to automatically remove attachments on the outer wall of the heat conduction pipe, and meanwhile the distance between the scrapers can be adjusted to adapt to different pipe diameters. The integration of efficient heat exchange and automatic maintenance is realized, the maintenance cost is reduced, and the energy utilization rate and the practicability and universality of the device are improved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning waste heat recovery technology, and in particular to an air conditioning waste heat recovery and utilization device. Background Technology

[0002] With the increasing demand for energy and the growing awareness of energy conservation and emission reduction, waste heat recovery technology for air conditioning has gradually become a research hotspot. In existing waste heat recovery systems, heat pipes are typically used to transfer the waste heat generated during air conditioning operation to a medium in a water tank, thus achieving heat recovery. However, these systems generally suffer from two major problems: First, the medium in the water tank is in a relatively static state, resulting in low heat exchange efficiency between the medium and the heat pipes, making it impossible to fully recover waste heat. Second, during long-term use, scale, dust, and other contaminants easily accumulate on the surface of the heat pipes, creating thermal resistance and further reducing heat exchange efficiency. Furthermore, manual cleaning of the heat pipes is not only time-consuming and labor-intensive but also prone to incomplete cleaning. In addition, existing waste heat recovery devices often require separate power sources for cleaning and heat exchange enhancement mechanisms, leading to complex equipment structures and high energy consumption.

[0003] Therefore, we propose an air conditioning waste heat recovery and utilization device. Utility Model Content

[0004] The main purpose of this utility model is to provide an air conditioning waste heat recovery and utilization device. In order to prevent the problems of low heat exchange efficiency caused by the stasis of the medium in the water tank, the formation of thermal resistance by dirt on the surface of the heat pipe, inconvenient cleaning and maintenance, and high energy consumption due to complex equipment structure, this device can improve the efficiency and energy utilization of air conditioning waste heat recovery, reduce equipment maintenance costs and energy consumption, and effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An air conditioning waste heat recovery and utilization device includes a water tank, inside which a heat-conducting pipe is provided. A protective cover is fixedly installed on the top of the water tank. A first screw is rotatably connected to the inner walls of both ends of the protective cover. The first screw is provided with a cleaning mechanism for cleaning the heat-conducting pipe. A motor is fixedly installed on the outside of one end of the protective cover, and the output shaft of the motor is coaxially connected to one end of the first screw. The other end of the first screw extends to the outside of the protective cover and is fixedly connected to the outer wall of the first pulley. A rotating rod is rotatably connected to the inner walls of both ends of the water tank. Symmetrical baffles are fixedly connected to the top and bottom ends of the rotating rod. One end of the rotating rod extends to the outside of the water tank and is fixedly connected to the outer wall of the second pulley. The second pulley and the first pulley are connected by belt drive.

[0007] By adopting the above technical solution, the heat pipe is arranged inside the water tank. The waste heat generated during the operation of the air conditioning system is transferred to the medium such as water in the water tank through the heat pipe to realize heat recovery. After the medium in the water tank absorbs heat, its temperature rises and it can be used for domestic hot water supply or other heat energy demand scenarios.

[0008] The baffle on the rotating rod agitates the medium in the water tank by rotating, breaking the static state of the fluid, increasing the contact frequency and turbulence between the medium and the heat pipe, thereby improving the heat exchange efficiency. The transmission path is as follows: the motor drives the first screw to rotate → the first screw drives the first pulley to rotate → the transmission is transmitted to the second pulley via belt → the second pulley drives the rotating rod and the baffle to rotate synchronously.

[0009] When the first screw rotates, its threaded structure will drive the cleaning mechanism to move back and forth along the screw axis. The cleaning mechanism usually includes components such as scrapers, which move close to the surface of the heat pipe to remove scale, dust or other attachments from the outer wall of the pipe. The forward and reverse design of the motor allows the cleaning mechanism to move back and forth inside the protective cover, ensuring that there are no dead angles in the cleaning of the entire length of the heat pipe. The protective cover protects the cleaning mechanism and transmission components and prevents the medium in the water tank from seeping in and affecting the mechanical transmission.

[0010] The motor drives both the cleaning mechanism and the baffle, and energy is distributed through belt drive. No additional power unit is required. The structure is compact and energy-saving. When the equipment is running, the baffle continuously enhances heat exchange, and the cleaning mechanism periodically or in real time removes dirt from the surface of the heat pipe, avoiding the accumulation of thermal resistance that leads to a decrease in efficiency. This achieves an integrated design of "high-efficiency heat exchange + automatic maintenance".

[0011] Furthermore, the cleaning mechanism includes a slider threaded to the outer wall of the first screw, and slide rods fixedly connected to the inner walls of both ends of the protective cover. The slide rods pass through the slider and are slidably engaged with the slider.

[0012] By adopting the above technical solution, the outer wall of the first screw is provided with threads, and the slider is threadedly connected to the first screw through the internal threads. When the motor drives the first screw to rotate, the helical motion of the threaded pair is converted into the linear motion of the slider.

[0013] The slider restricts the rotational freedom of the slider, ensuring that the slider moves only in a straight line along the screw axis, avoiding synchronous rotation of the slider due to screw rotation, and ensuring the stability of the cleaning path.

[0014] Furthermore, a support frame is fixedly connected to the bottom end of the slider, and a second screw is rotatably connected to the inner walls of both ends of the support frame. One end of the second screw passes through the support frame and is fixedly connected to a turntable.

[0015] By adopting the above technical solution, the second screw is driven to rotate by rotating the turntable.

[0016] Furthermore, the outer side of the second screw is provided with two sets of opposing output threaded grooves, and two symmetrical scrapers are threadedly connected to the outside of the threaded grooves respectively. The bottom of the support frame is provided with a limiting groove that slides with the scrapers.

[0017] By adopting the above technical solution, when the second screw rotates, the left thread drives the left scraper to move towards the middle of the screw, and the right thread drives the right scraper to move towards the middle simultaneously, achieving symmetrical clamping; when rotating in the opposite direction, the scrapers are driven to separate to both sides. Since the left and right threads of the screw have the same pitch, the moving speed and distance of the two scrapers are completely consistent when rotating, ensuring symmetrical cleaning of the center of the heat pipe. By rotating the second screw, the distance between the two scrapers can be adjusted to adapt to heat pipes of different diameters.

[0018] The limiting groove restricts the vertical freedom of the scraper, allowing it to move only along the screw axis, thus preventing the scraper from tilting or deviating due to the radial force of the threaded drive and ensuring that the scraping trajectory is parallel to the axis of the heat pipe.

[0019] Furthermore, the top of the water tank is provided with a through groove for two scrapers to pass through, and the two scrapers are provided with an arc-shaped scraping groove on the opposite side.

[0020] By adopting the above technical solution, the through groove opened at the top of the water tank is aligned vertically with the limiting groove at the bottom of the support frame, and its width matches the thickness of the scraper.

[0021] An arc-shaped scraping groove is provided on the opposite side of the scraper. The radius of curvature of the groove matches or is slightly larger than the outer diameter of the heat pipe, forming a tiny gap. When the two scrapers move towards each other to clamp the heat pipe, the inner surface of the arc-shaped scraping groove forms a line contact or surface contact with the outer wall of the heat pipe, covering the pipe wall area and ensuring no blind spots in cleaning. The arc-shaped structure makes the pressure of the scraper on the heat pipe evenly distributed along the circumference, avoiding pipe wall damage such as scratches and deformation caused by local stress concentration of traditional flat scrapers.

[0022] Furthermore, an inclined guide plate is provided inside the bottom of the water tank, and one end of the water tank is fixedly connected to a drain valve located at the lower part of the inclined guide plate.

[0023] By adopting the above technical solution, the cooling water and the mixed wastewater of dirt scraped off during the cleaning process in the water tank flow to the lower part of the guide plate due to gravity, and finally converge to the vicinity of the drain valve.

[0024] The drain valve is normally closed to prevent cooling water leakage from the water tank and ensure the normal operation of waste heat recovery. When it is necessary to discharge sewage, the drain valve is opened, and the mixed liquid flows out quickly under the guidance of the baffle plate. It can also be connected to the sewage treatment system through external pipes or discharged directly.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This utility model discloses an air conditioning waste heat recovery and utilization device. The first screw is driven by a motor, which drives the baffle plate on the rotating rod to rotate via belt transmission. This continuously agitates the medium in the water tank, breaks the static state of the fluid, significantly increases the contact frequency and turbulence degree between the medium and the heat pipe, and greatly improves the heat exchange efficiency. It can fully recover the waste heat generated by the air conditioner and use it for domestic hot water supply or other heat energy demand scenarios, effectively improving energy utilization.

[0027] This utility model discloses an air conditioning waste heat recovery and utilization device. When the motor drives the first screw to rotate, it drives the cleaning mechanism to move back and forth along the screw axis. The scraper in the cleaning mechanism is in close contact with the surface of the heat-conducting pipe, automatically removing scale, dust and other deposits from the outer wall of the pipe, avoiding the accumulation of thermal resistance and resulting efficiency reduction. At the same time, by rotating the turntable to drive the second screw, the distance between the two scrapers can be adjusted to adapt to heat-conducting pipes of different diameters. The arc-shaped scraping groove on the opposite side of the scraper can not only ensure the thorough cleaning of the heat-conducting pipe, but also avoid damage to the pipe wall caused by local stress concentration. It realizes the integrated design of "high-efficiency heat exchange + automatic maintenance", reduces equipment maintenance costs, and improves the practicality and versatility of the device. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an air conditioning waste heat recovery and utilization device according to the present invention.

[0029] Figure 2 This is a schematic diagram of the internal structure of an air conditioning waste heat recovery and utilization device according to the present invention.

[0030] Figure 3 This is a schematic diagram of the cleaning mechanism of an air conditioning waste heat recovery and utilization device according to the present invention.

[0031] In the diagram: 1. Water tank; 2. Heat pipe; 3. Protective cover; 4. First screw; 5. Motor; 6. First pulley; 7. Rotating rod; 8. Second pulley; 9. Belt; 10. Baffle; 11. Cleaning mechanism; 12. Slider; 13. Sliding rod; 14. Support frame; 15. Second screw; 16. Turntable; 17. Scraper; 18. Limiting groove; 19. Through groove; 20. Arc-shaped scraper groove; 21. Inclined guide plate; 22. Drain valve. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0033] To prevent problems such as low heat exchange efficiency due to stagnant medium in the water tank, thermal resistance caused by fouling on the heat pipe surface, inconvenient cleaning and maintenance, and high energy consumption due to complex equipment structure, and to improve the efficiency and energy utilization of waste heat recovery from air conditioning, while reducing equipment maintenance costs and energy consumption, such as... Figure 1 , Figure 2 , Figure 3 As shown, an air conditioning waste heat recovery and utilization device includes a water tank 1, a heat-conducting pipe 2 inside the water tank 1, a protective cover 3 fixedly installed on the top of the water tank 1, a first screw 4 rotatably connected to the inner walls of both ends of the protective cover 3, a cleaning mechanism 11 for cleaning the heat-conducting pipe 2 on the first screw 4, a motor 5 fixedly installed on the outside of one end of the protective cover 3, and the output shaft of the motor 5 coaxially connected to one end of the first screw 4, the other end of the first screw 4 extending to the outside of the protective cover 3 and a first pulley 6 fixedly connected to the outer wall, a rotating rod 7 rotatably connected to the inner walls of both ends of the water tank 1, symmetrical baffles 10 fixedly connected to the top and bottom ends of the rotating rod 7, a second pulley 8 fixedly connected to the outer wall of the rotating rod 7 extending to the outside of the water tank 1, and the second pulley 8 and the first pulley 6 being connected by a belt 9 for transmission.

[0034] In use, the heat pipe 2 is arranged inside the water tank 1. The waste heat generated during the operation of the air conditioning system is transferred to the medium such as water in the water tank through the heat pipe to realize heat recovery. After the medium in the water tank absorbs heat, its temperature rises and it can be used for domestic hot water supply or other heat energy demand scenarios.

[0035] The baffle 10 on the rotating rod 7 stirs the medium in the water tank by rotating, breaking the static state of the fluid, increasing the contact frequency and turbulence degree between the medium and the heat pipe, thereby improving the heat exchange efficiency. The transmission path is: the motor 5 drives the first screw 4 to rotate → the first screw drives the first pulley 6 to rotate → the transmission is transmitted to the second pulley 8 through the belt 9 → the second pulley drives the rotating rod 7 and the baffle 10 to rotate synchronously.

[0036] When the first screw 4 rotates, its threaded structure will drive the cleaning mechanism 11 to move back and forth along the screw axis. The cleaning mechanism usually includes components such as scrapers, which move close to the surface of the heat pipe to remove scale, dust or other attachments from the outer wall of the pipe. The forward and reverse design of the motor allows the cleaning mechanism to move back and forth inside the protective cover 3, ensuring that there are no dead angles in the cleaning of the entire length of the heat pipe. The protective cover 3 protects the cleaning mechanism and transmission components and prevents the medium in the water tank from seeping in and affecting the mechanical transmission.

[0037] Motor 5 drives cleaning mechanism 11 and baffle 10 simultaneously. Energy distribution is achieved through belt drive, eliminating the need for an additional power unit. The structure is compact and energy-saving. During operation, the baffle continuously enhances heat exchange, and the cleaning mechanism periodically or in real time removes dirt from the surface of the heat pipe, avoiding the accumulation of thermal resistance that leads to a decrease in efficiency. This achieves an integrated design of "high-efficiency heat exchange + automatic maintenance".

[0038] For example, such as Figure 2 , Figure 3As shown, the present invention also includes a cleaning mechanism 11 comprising a slider 12 threadedly connected to the outer wall of the first screw 4, and a sliding rod 13 fixedly connected to the inner walls of both ends of the protective cover 3, wherein the sliding rod 13 passes through the slider 12 and is slidably connected to the slider 12.

[0039] In use, the outer wall of the first screw 4 is threaded, and the slider 12 is threaded to the first screw 4 through the internal thread. When the motor 5 drives the first screw 4 to rotate, the helical motion of the threaded pair is converted into the linear motion of the slider 12.

[0040] The slider 13 restricts the rotational freedom of the slider 12, ensuring that the slider moves only in a straight line along the screw axis, avoiding synchronous rotation of the slider due to screw rotation, and ensuring the stability of the cleaning path.

[0041] For example, such as Figure 1 , Figure 2 , Figure 3 As shown, the present invention also includes a support frame 14 fixedly connected to the bottom end of the slider 12, and a second screw 15 rotatably connected to the inner walls of both ends of the support frame 14. One end of the second screw 15 passes through the support frame 14 and is fixedly connected to a turntable 16.

[0042] In use, the second screw 15 is rotated by rotating the turntable 16.

[0043] For example, such as Figure 2 , Figure 3 As shown, the present invention also includes two sets of opposing output threaded grooves on the outer side of the second screw 15, and two symmetrical scrapers 17 are respectively threaded to the outside of the threaded grooves. The bottom of the support frame 14 is provided with a limiting groove 18 that slides with the scraper 17.

[0044] In use, when the second screw 15 rotates, the left thread drives the left scraper 17 to move towards the center of the screw, and the right thread drives the right scraper 17 to move towards the center simultaneously, achieving symmetrical clamping; when rotated in the opposite direction, the scrapers 17 are driven to separate to both sides. Since the left and right threads of the screw have the same pitch, the moving speed and distance of the two scrapers 17 are completely consistent when rotating, ensuring symmetrical cleaning of the center of the heat pipe. By rotating the second screw 15, the distance between the two scrapers 17 can be adjusted to adapt to heat pipes of different diameters.

[0045] The limiting groove 18 restricts the vertical freedom of the scraper 17 to only allow it to move along the screw axis, preventing the scraper from tilting or deviating due to the radial force of the threaded drive, and ensuring that the scraping trajectory is parallel to the axis of the heat pipe.

[0046] For example, such as Figure 3As shown, the present invention also includes a through groove 19 at the top of the water tank 1 for two scrapers 17 to pass through, and an arc-shaped scraping groove 20 on the opposite side of the two scrapers 17.

[0047] When in use, the through groove 19 at the top of the water tank 1 is aligned vertically with the limiting groove 18 at the bottom of the support frame 14, and its width matches the thickness of the scraper 17.

[0048] An arc-shaped scraping groove 20 is provided on the opposite side of the scraper 17. Its radius of curvature matches or is slightly larger than the outer diameter of the heat pipe 2, forming a tiny gap. When the two scrapers 17 move towards each other to clamp the heat pipe, the inner surface of the arc-shaped scraping groove forms a line contact or surface contact with the outer wall of the heat pipe, covering the pipe wall area and ensuring no blind spots in cleaning. The arc-shaped structure makes the pressure of the scraper on the heat pipe evenly distributed along the circumference, avoiding pipe wall damage such as scratches and deformation caused by local stress concentration of traditional flat scrapers.

[0049] For example, such as Figure 2 As shown, the present invention also includes an inclined guide plate 21 provided inside the bottom end of the water tank 1, and a drain valve 22 located at the lower part of the inclined guide plate 21 is fixedly connected to one end of the water tank 1.

[0050] During use, the cooling water and the wastewater mixed with dirt scraped off during the cleaning process in the water tank flow to the lower part of the guide plate due to gravity, and eventually converge to the vicinity of the drain valve 22.

[0051] The drain valve is normally closed to prevent cooling water leakage from the water tank and ensure the normal operation of waste heat recovery. When it is necessary to discharge sewage, the drain valve is opened, and the mixed liquid flows out quickly under the guidance of the baffle plate. It can also be connected to the sewage treatment system through external pipes or discharged directly.

[0052] It should be noted that this utility model is an air conditioning waste heat recovery and utilization device. When the motor 5 is turned on, the motor drives the first screw 4 to rotate. The first screw 4 drives the rotating rod 7 and the baffle 10 to rotate through the first pulley 6, belt 9, and second pulley 8, which agitates the medium in the water tank, increases the contact frequency and turbulence degree with the heat pipe, and improves the heat exchange efficiency.

[0053] The thread of the first screw 4 pushes the slider 12 to move linearly along the slide bar 13, which drives the support frame 14 and scraper 17 to reciprocate, removing scale, dust and other attachments from the outer wall of the heat pipe. When the air conditioning system is running, the waste heat is transferred to the water tank medium through the heat pipe. After the medium is heated, it can be used for domestic hot water or other heat energy demand scenarios.

[0054] The motor 5 adopts a forward and reverse rotation design, which makes the cleaning mechanism 11 move back and forth inside the protective cover 3 to ensure that the entire length of the heat pipe is cleaned without dead corners. The cleaning cycle can be set through the motor control system according to the scale buildup of the heat pipe, such as periodically starting the cleaning or running in real time with heat exchange.

[0055] When the medium in water tank 1 becomes turbid or the cleaning frequency drops significantly, sewage treatment is required. Stop the equipment operation, turn off motor 5 and the residual heat input of the air conditioning system, open drain valve 22, and the cooling water and dirt mixture in the water tank will be quickly discharged from the lower part of the drain valve under the guidance of the inclined guide plate 21. After the sewage discharge is completed, close drain valve 22, re-inject cleaning medium, and resume equipment operation.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An air conditioning waste heat recovery and utilization device, comprising a water tank (1), characterized in that, The water tank (1) is equipped with a heat-conducting pipe (2) inside. A protective cover (3) is fixedly installed on the top of the water tank (1). A first screw (4) is rotatably connected to the inner walls of both ends of the protective cover (3). A cleaning mechanism (11) for cleaning the heat-conducting pipe (2) is provided on the first screw (4). A motor (5) is fixedly installed on the outside of one end of the protective cover (3), and the output shaft of the motor (5) is coaxially connected to one end of the first screw (4). The other end of the first screw (4) extends to the outside of the protective cover (3) and a first pulley (6) is fixedly connected to the outer wall. A rotating rod (7) is rotatably connected to the inner walls of both ends of the water tank (1). A symmetrical baffle plate (10) is fixedly connected to the top and bottom ends of the rotating rod (7). One end of the rotating rod (7) extends to the outside of the water tank (1) and a second pulley (8) is fixedly connected to the outer wall. The second pulley (8) and the first pulley (6) are connected by a belt (9).

2. The air conditioning waste heat recovery and utilization device according to claim 1, characterized in that: The cleaning mechanism (11) includes a slider (12) threaded to the outer wall of the first screw (4), and a slide rod (13) fixedly connected to the inner walls of both ends of the protective cover (3). The slide rod (13) passes through the slider (12) and is slidably connected to the slider (12).

3. The air conditioning waste heat recovery and utilization device according to claim 2, characterized in that: The bottom end of the slider (12) is fixedly connected to a support frame (14), and the inner walls of both ends of the support frame (14) are rotatably connected to a second screw (15). One end of the second screw (15) passes through the support frame (14) and is fixedly connected to a turntable (16).

4. The air conditioning waste heat recovery and utilization device according to claim 3, characterized in that: The second screw (15) has two sets of opposite output thread grooves on its outer side, and two symmetrical scrapers (17) are threaded to the outside of the thread grooves respectively. The bottom of the support frame (14) is provided with a limiting groove (18) that slides with the scraper (17).

5. The air conditioning waste heat recovery and utilization device according to claim 1, characterized in that: The top of the water tank (1) is provided with a through groove (19) for two scrapers (17) to pass through, and an arc-shaped scraper groove (20) is provided on the opposite side of the two scrapers (17).

6. The air conditioning waste heat recovery and utilization device according to claim 1, characterized in that: The bottom of the water tank (1) is provided with an inclined guide plate (21), and one end of the water tank (1) is fixedly connected to a drain valve (22) located at the bottom of the inclined guide plate (21).

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