Waste heat recycling device of heating ventilation air conditioner

Abstract

The invention provides a waste heat recycling device of a heating ventilation air conditioner, and relates to the technical field of air conditioner waste heat recovery, the waste heat recycling device comprises heat absorption pipes, the main body of each heat absorption pipe is of a semicircular structure, the heat absorption pipes are symmetrically arranged in two groups, and the two opposite heat absorption pipes are connected through a hoop; a connecting pipe is fixedly installed on the outer end face of the heat absorption pipe. According to the device, after the water temperature in a second heat recovery tank rises, a driving motor drives a guide plate at the outer end of a driving shaft to rotate, the guide plate rotates to the left side from the right side of a conversion box, in this way, a second guide pipe on the left side is blocked by the guide plate, and a heated medium enters a first guide pipe; the problems that a traditional waste heat recovery device achieves heat transfer through direct heat exchange of fluid, the contact time of high-temperature fluid and media is short, heat transfer is insufficient, an efficient energy storage mechanism is lacked, and when the waste heat generation amount is not matched with the heat using requirement, redundant heat cannot be stored are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning waste heat recovery, and in particular to a waste heat recovery and utilization device for heating, ventilation and air conditioning. Background Art

[0002] In modern building HVAC systems, energy consumption accounts for approximately 30%-50% of the building's total energy consumption. The waste heat generated during air-conditioning operation, such as high-temperature fluid discharged from the cooling system and compressor heat dissipation, is usually directly discharged into the environment, causing serious energy waste. Therefore, how to efficiently recover this waste heat has become a key issue in the field of building energy conservation.

[0003] Referring to patent CN202311807308.2, a heat recovery system for HVAC is disclosed, which relates to the field of air conditioning waste heat recovery. The system includes a support frame, on which a heat preservation tank and a waste heat utilization device are fixed. The waste heat utilization device includes a waste heat recovery mechanism and a waste heat distribution mechanism. Using this method, during the HVAC waste heat recovery and utilization process, the waste heat distribution mechanism can actively adjust the heat distribution mode according to the heat dissipation of the HVAC, so that the waste heat recovery mechanism can recover the waste heat more efficiently and improve the waste heat utilization effect.

[0004] Based on the search of the above patents and combined with the current waste heat recovery device, it is found that the existing technology still has the following two deficiencies: First, traditional waste heat recovery devices mostly use simple tubular heat exchangers to achieve heat transfer through direct fluid heat exchange. This results in limited heat exchange area and short contact time between the high-temperature fluid and the medium, resulting in insufficient heat transfer. Secondly, there is a lack of efficient energy storage mechanism. When the amount of waste heat generated does not match the heat demand, such as when the heat load is reduced at night, the excess heat cannot be stored, resulting in energy waste. Summary of the Invention

[0005] The present invention relates to a waste heat recovery and utilization device for heating, ventilation and air conditioning, which solves the problem that traditional waste heat recovery devices mostly use simple tubular heat exchangers to achieve heat transfer through direct heat exchange of fluids. In this way, the heat exchange area is limited, the contact time between the high-temperature fluid and the medium is short, resulting in insufficient heat transfer, and the lack of an efficient energy storage mechanism. When the amount of waste heat generated does not match the heat demand, the excess heat cannot be stored.

[0006] The present invention provides a waste heat recovery and utilization device for heating, ventilation and air conditioning, which specifically includes: a heat absorption tube; The heat absorption tube body is a semicircular structure, and two groups of heat absorption tubes are symmetrically arranged. The two opposite heat absorption tubes are connected by a clamp, and a connecting tube is fixedly installed on the outer end surface of the heat absorption tube; a first collecting pipe, which is a tubular structure and is connected to the connecting pipe at the outer end of the left heat absorption pipe; A second collecting pipe, which is a tubular structure and is connected to the connecting pipe at the outer end of the left heat absorption pipe; A conversion box, wherein a drive motor is fixedly mounted on the upper end surface of the conversion box, a through-hole is opened on the front side plate and the left and right end side plates of the conversion box, a first guide tube is fixedly mounted on the right end of the conversion box, and a second guide tube is fixedly mounted on the left end of the conversion box; a first heat recovery tank, wherein a cover plate is provided at an upper end of the first heat recovery tank, the cover plate is connected to the first heat recovery tank by bolts, and a first release pipe and a water pipe are installed inside the first heat recovery tank; The second heat recovery tank is provided with through pipes at the upper and lower ends thereof, and a second release pipe is provided inside the second heat recovery tank.

[0007] Furthermore, the exterior of the heat absorption tube is sleeved with two sleeves, and two thin sheets are symmetrically installed at both ends of the sleeves.

[0008] Furthermore, a water outlet pipe is fixedly mounted on the outer end surface of the first collecting pipe, and the other end of the water outlet pipe is fixedly connected to the conversion box.

[0009] Furthermore, the first guide pipe and the first release pipe at the right end of the conversion box are connected to each other, the water outlet end of the first release pipe is fixedly installed with a first return pipe, and the end of the first return pipe is fixedly connected to the second collecting pipe.

[0010] Furthermore, the second guide pipe at the left end of the conversion box is interconnected with the second release pipe inside the second heat recovery tank. The second release pipe is arranged in a spiral structure. The end of the second release pipe is fixedly installed with a second return pipe, and the end of the second return pipe is interconnected with the second collecting pipe.

[0011] Furthermore, three partitions are evenly installed inside the first heat recovery tank, and the interior of the first heat recovery tank is filled with sodium sulfate decahydrate.

[0012] Furthermore, the first release pipe is distributed inside the first heat recovery tank in an S-shaped structure, and the first release pipe is fixedly connected to the partition.

[0013] Furthermore, the water pipe is distributed in the first heat recovery tank in an S-shaped structure, and the water pipe is fixedly connected to the partition.

[0014] Furthermore, the lower end surface of the driving motor is transmission-connected to a driving shaft, and a guide plate is fixedly mounted on the outer end surface of the driving shaft.

[0015] The present invention provides a waste heat recovery and utilization device for heating, ventilation and air conditioning, which has the following beneficial effects: 1. The main body of the heat absorption tube is a semicircular structure. The two heat absorption tubes are connected by a clamp, so that the two heat absorption tubes can be butt together to form a heat absorption channel. The outside of the heat absorption tube is connected with a sleeve, and two thin sheets are symmetrically installed on the outer end surface of the sleeve. This increases the contact area to improve the heat absorption efficiency. At the same time, the sleeve and the thin sheet can be made of copper, which can improve the heat exchange efficiency.

[0016] 2. A drive motor is fixedly installed on the upper end face of the conversion box, and a drive shaft is connected to the lower end face of the drive motor. A guide plate is fixedly installed on the outer end face of the drive shaft. After the drive motor is started, the guide plate can be driven to rotate, thereby blocking different through holes of the conversion box and allowing the medium to flow in different directions, which is conducive to the recovery of waste heat.

[0017] 3. The second release pipe is located inside the second heat recovery tank, so the medium can heat the water inside the second heat recovery tank when flowing through the second release pipe, which is convenient for people to use and achieves the purpose of waste heat recovery. After the heat inside the medium is released, it will enter the second collecting pipe through the second return pipe, and then enter the heat absorption pipe from the connecting pipe on the left to complete a cycle.

[0018] 4. When the water temperature inside the second heat recovery tank rises to a certain temperature, the efficiency of the second release pipe in releasing heat will decrease. At this time, the drive motor can be started, and the drive motor drives the guide plate at the outer end of the drive shaft to rotate, so that the guide plate rotates from the right side of the conversion box to the left side. In this way, the guide plate will block the second guide pipe on the left side, allowing the heated medium to enter the first guide pipe. The first release pipe is located inside the first heat recovery tank. When the medium passes through the first release pipe, it can release heat to the outside, and after sodium sulfate decahydrate absorbs this heat, it can change from solid to liquid, thereby storing this part of the heat.

[0019] 5. A water pipe is installed inside the first heat recovery tank. When people need to use this heat in the future, cold water can be passed through the water pipe. At this time, sodium sulfate decahydrate will be converted from liquid to solid, releasing the stored heat to the outside, which can heat the water inside the water pipe and realize the reuse of waste heat. The water pipe and the first release pipe are both set in an S-shaped structure, which increases the flow time of the medium inside the pipe and can improve the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0021] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0022] In the attached figure: Figure 1 Shows a schematic diagram of the overall structure of the device of the present invention; Figure 2 Shows a schematic structural diagram of the heat absorption tube and the connecting tube of the present invention; Figure 3 A schematic diagram of the connection structure between the heat absorption tube and the sleeve of the present invention is shown; Figure 4 Shows a schematic diagram of the internal structure of the conversion box of the present invention; Figure 5 Shows a schematic structural diagram of the heat absorption tube, the first collecting tube and the second collecting tube of the present invention; Figure 6 It shows a schematic diagram of the internal structure of the first heat recovery tank of the present invention; Figure 7 Shows a schematic diagram of the internal structure of the second heat recovery tank of the present invention; Figure 8 A schematic diagram of the connection structure between the first release tube and the partition of the present invention is shown; Figure 9 A schematic diagram of the connection structure between the drive motor and the drive shaft of the present invention is shown.

[0023] List of reference numerals: 1. Heat absorption tube; 101. Sleeve; 1011. Sheet; 102. Connecting tube; 2. First collecting tube; 201. Water outlet tube; 3. Second collecting tube; 4. Conversion box; 401. First guide tube; 402. Second guide tube; 5. Drive motor; 501. Drive shaft; 5011. Guide plate; 6. First heat recovery tank; 601. Cover plate; 602. Partition; 7. First release tube; 701. First return water tube; 8. Water supply tube; 9. Second heat recovery tank; 10. Second release tube; 1001. Second return water tube. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1: Please refer to Figures 1 to 9 : The present invention proposes a waste heat recovery and utilization device for heating, ventilation and air conditioning, comprising: a heat absorption tube 1; The main body of the heat absorption tube 1 is a semicircular structure. The heat absorption tube 1 is symmetrically provided with two groups. The two opposite heat absorption tubes 1 are connected by a clamp. The outer end surface of the heat absorption tube 1 is fixedly installed with a connecting tube 102. The first collecting pipe 2 is a tubular structure, and the first collecting pipe 2 is connected to the connecting pipe 102 at the outer end of the left heat absorption pipe 1; The second collecting pipe 3 is a tubular structure, and the second collecting pipe 3 is connected to the connecting pipe 102 at the outer end of the left heat absorption tube 1; The conversion box 4 has a drive motor 5 fixedly mounted on its upper end surface. Through holes are provided on the front side panel and the left and right side panels of the conversion box 4. A first guide tube 401 is fixedly mounted on the right end of the conversion box 4, and a second guide tube 402 is fixedly mounted on the left end of the conversion box 4. A first heat recovery tank 6 is provided with a cover plate 601 at the upper end of the first heat recovery tank 6. The cover plate 601 is connected to the first heat recovery tank 6 by bolts. A first release pipe 7 and a water pipe 8 are installed inside the first heat recovery tank 6. The second heat recovery tank 9 has through pipes installed at its upper and lower ends, and a second release pipe 10 is installed inside the second heat recovery tank 9 .

[0026] Among them, the outside of the heat absorption tube 1 is connected to two sleeves 101, and two thin sheets 1011 are symmetrically installed at both ends of the sleeve 101. The outer end face of the first collecting pipe 2 is fixedly installed with a water outlet pipe 201, and the other end of the water outlet pipe 201 is fixedly connected to the conversion box 4. During use, the main body of the heat absorption tube 1 is a semicircular structure, and the two heat absorption tubes 1 are connected by a clamp, so that the two heat absorption tubes 1 can be docked together to form a heat absorption channel. When the air conditioner is running, the high-temperature fluid passes through the outside of the heat absorption tube 1, and the heat is transferred to the medium in the tube through the tube wall to heat the medium. The sleeve 101 and the thin sheet 1011 can be made of copper material, which can improve the heat exchange efficiency.

[0027] Among them, the first guide pipe 401 at the right end of the conversion box 4 is connected to the first release pipe 7, the water outlet end of the first release pipe 7 is fixedly installed with the first return pipe 701, and the end of the first return pipe 701 is fixedly connected to the second collecting pipe 3, so that the medium can circulate inside the pipeline.

[0028] Among them, the second guide pipe 402 at the left end of the conversion box 4 is interconnected with the second release pipe 10 inside the second heat recovery tank 9. The second release pipe 10 is arranged in a spiral structure. The end of the second release pipe 10 is fixedly installed with a second return water pipe 1001. The end of the second return water pipe 1001 is interconnected with the second collecting pipe 3. During use, the circulation of the medium can be realized.

[0029] Among them, three partitions 602 are evenly installed inside the first heat recovery tank 6. The interior of the first heat recovery tank 6 is filled with sodium sulfate decahydrate. Sodium sulfate decahydrate absorbs and releases energy when converting from solid to liquid, which can realize the reuse of waste heat.

[0030] Among them, the first release pipe 7 is distributed in the first heat recovery tank 6 in an S-shaped structure, the first release pipe 7 is fixedly connected to the partition 602, and the water pipe 8 is distributed in the first heat recovery tank 6 in an S-shaped structure, the water pipe 8 is fixedly connected to the partition 602, which can realize the fixation of the water pipe 8 and the first release pipe 7.

[0031] Among them, the lower end face of the driving motor 5 is transmission-connected to the driving shaft 501, and the outer end face of the driving shaft 501 is fixedly installed with a guide plate 5011. During use, the driving motor 5 drives the guide plate 5011 at the outer end of the driving shaft 501 to rotate, so that the guide plate 5011 rotates from the right side to the left side of the conversion box 4, so that the guide plate 5011 will block the second guide tube 402 on the left, allowing the heated medium to enter the first guide tube 401.

[0032] Example 2, based on Example 1, Figures 1-9 As shown, a temperature sensor can be installed inside the second heat recovery tank 9, and a controller can be installed at the outer end of the second heat recovery tank 9, so that the controller is electrically connected to the temperature sensor and the drive motor 5 respectively. The temperature sensor can monitor the temperature of the water inside the second heat recovery tank 9. When the water temperature inside the second heat recovery tank 9 rises to a certain level, it means that fewer people use hot water at the current stage, and after the water temperature rises, the heat absorption rate inside the medium will decrease. At this time, the temperature sensor can transmit the signal to the controller, and the controller sends a start signal to the drive motor 5. After receiving the signal, the drive motor 5 can drive the guide plate 5011 outside the drive shaft 501 to rotate, so that the medium flows through the first release pipe 7, so that the heat can be temporarily stored in the sodium sulfate decahydrate in the first heat recovery tank 6.

[0033] The working principle of this embodiment is as follows: In the present invention, the main body of the heat absorption tube 1 is a semicircular structure, and the two heat absorption tubes 1 are connected by a clamp, so that the two heat absorption tubes 1 can be butted together to form a heat absorption channel. When the air conditioner is running, the high-temperature fluid passes through the outside of the heat absorption tube 1, and the heat is transferred to the medium in the tube through the tube wall to heat the medium. The outside of the heat absorption tube 1 is sleeved with a sleeve 101, and two thin sheets 1011 are symmetrically installed on the outer end surface of the sleeve 101. The sleeve 101 and the thin sheets 1011 can be made of copper material, which can improve the heat exchange efficiency. In this way, the heat absorption efficiency is improved by increasing the contact area, and the medium inside the pipeline can be heated. The heated medium will enter the first collecting pipe 2 through the connecting pipe 102 at the right end. , and enters the interior of the conversion box 4 through the outlet pipe 201. The upper end surface of the conversion box 4 is fixedly installed with a drive motor 5, and the lower end surface of the drive motor 5 is transmission-connected with a drive shaft 501. The outer end surface of the drive shaft 501 is fixedly installed with a guide plate 5011. By setting the guide plate 5011, the heated medium can be diverted to different directions. First, the guide plate 5011 is rotated to the right to block the through hole on the surface of the right end side plate of the conversion box 4. In this way, the medium will enter the second guide pipe 402 and enter the second release pipe 10 through the second guide pipe 402. The second release pipe 10 is located inside the second heat recovery tank 9, so the medium can heat the water inside the second heat recovery tank 9 when flowing through the second release pipe 10, which is convenient for People's use has achieved the purpose of waste heat recovery. After the heat inside the medium is released, it will enter the second collecting pipe 3 through the second return water pipe 1001, and then enter the heat absorption pipe 1 from the left connecting pipe 102 to realize a cycle. When the water temperature inside the second heat recovery tank 9 rises to a certain temperature, the efficiency of the second release pipe 10 in releasing heat will decrease. At this time, the drive motor 5 can be started, and the drive motor 5 drives the guide plate 5011 at the outer end of the drive shaft 501 to rotate, so that the guide plate 5011 rotates from the right side of the conversion box 4 to the left side, so that the guide plate 5011 will block the second guide pipe 402 on the left side, allowing the heated medium to enter the first guide pipe 401. The first guide pipe 401 is connected to the first release pipe 7. They are interconnected, and the first release pipe 7 is located inside the first heat recovery tank 6. When the medium passes through the first release pipe 7, it can release heat to the outside, and the sodium sulfate decahydrate can change from solid to liquid after absorbing the heat, thereby storing this part of the heat. After releasing the heat, the medium enters the second collecting pipe 3 from the first return water pipe 701, and then enters the heat absorption pipe 1 from the left connecting pipe 102, realizing a cycle. When people need to use this part of the heat in the later stage, cold water can be passed through the water pipe 8. At this time, the sodium sulfate decahydrate will change from liquid to solid, and release the stored heat to the outside, which can heat the water inside the water pipe 8 and realize the reuse of waste heat. The water pipe 8 and the first release pipe 7 are both arranged in an S-shaped structure.This increases the flow time of the medium inside the pipe and improves the heat exchange efficiency.

Claims

1. A waste heat recovery and utilization device for heating, ventilation and air conditioning, characterized in that: include: A heat absorption tube (1), wherein the main body of the heat absorption tube (1) is a semicircular structure, and the heat absorption tube (1) is symmetrically provided with two groups, and the two opposite heat absorption tubes (1) are connected by a clamp, and the outer end surface of the heat absorption tube (1) is fixedly installed with a connecting tube (102); a first collecting tube (2), wherein the first collecting tube (2) is a tubular structure, and the first collecting tube (2) and the connecting tube (102) at the outer end of the left heat absorption tube (1) are mutually communicated; a second collecting tube (3), wherein the second collecting tube (3) is a tubular structure, and the second collecting tube (3) is connected with the connecting tube (102) at the outer end of the left heat absorption tube (1); a conversion box (4), wherein the upper end surface of the conversion box (4) is fixedly installed with a driving motor (5), through-holes are provided on the front side plate and the left and right side plate surfaces of the conversion box (4), a first guide pipe (401) is fixedly installed on the right end of the conversion box (4), and a second guide pipe (402) is fixedly installed on the left end of the conversion box (4); a first heat recovery tank (6), a cover plate (601) is provided on the upper end of the first heat recovery tank (6), the cover plate (601) and the first heat recovery tank (6) are connected by bolts, and a first release pipe (7) and a water pipe (8) are installed inside the first heat recovery tank (6); a second heat recovery tank (9), through pipes are installed on the upper and lower ends of the second heat recovery tank (9), and a second release pipe (10) is installed inside the second heat recovery tank (9).

2. The waste heat recovery device for HVAC according to claim 1, characterized in that: The heat absorption tube (1) is externally sleeved with two sleeves (101), and two thin sheets (1011) are symmetrically mounted at both ends of the sleeves (101).

3. The waste heat recovery device for HVAC according to claim 1, characterized in that: A water outlet pipe (201) is fixedly mounted on the outer end surface of the first collecting pipe (2), and the other end of the water outlet pipe (201) is fixedly connected to the conversion box (4).

4. The waste heat recovery device for HVAC according to claim 1, characterized in that: The first guide pipe (401) at the right end of the conversion box (4) is connected to the first release pipe (7), the outlet end of the first release pipe (7) is fixedly mounted with a first water return pipe (701), and the end of the first water return pipe (701) is fixedly connected to the second collecting pipe (3).

5. The waste heat recovery device for HVAC according to claim 1, characterized in that: The second guide pipe (402) at the left end of the conversion box (4) is connected to the second release pipe (10) inside the second heat recovery tank (9), the second release pipe (10) is arranged in a spiral structure, the end of the second release pipe (10) is fixedly installed with a second return pipe (1001), and the end of the second return pipe (1001) is connected to the second collecting pipe (3).

6. The waste heat recovery and utilization device for heating, ventilation and air conditioning according to claim 1, characterized in that: Three partitions (602) are evenly installed inside the first heat recovery tank (6), and the interior of the first heat recovery tank (6) is filled with sodium sulfate decahydrate.

7. The waste heat recovery and utilization device for heating, ventilation and air conditioning according to claim 1, characterized in that: The first release pipe (7) is distributed in the first heat recovery tank (6) in an S-shaped structure, and the first release pipe (7) is fixedly connected to the partition (602).

8. The waste heat recovery and utilization device for heating, ventilation and air conditioning according to claim 1, characterized in that: The water delivery pipe (8) is distributed in the first heat recovery tank (6) in an S-shaped structure, and the water delivery pipe (8) is fixedly connected to the partition (602).

9. The waste heat recovery device for HVAC according to claim 1, characterized in that: The lower end surface of the driving motor (5) is drivingly connected to a driving shaft (501), and a guide plate (5011) is fixedly mounted on the outer end surface of the driving shaft (501).

Images