Heating ventilation air conditioner waste heat utilization device

Abstract

The utility model relates to the technical field of heating ventilation air conditioners, in particular to a heating ventilation air conditioner waste heat utilization device which comprises a tank body, one end of the tank body in the length direction is provided with an air inlet, and the other end of the tank body is provided with an air outlet. A heat exchange tube is arranged in the tank body and is arranged in a snake shape, the two ends of the heat exchange tube penetrate out of the side wall of the tank body, the outer wall of the heat exchange tube is fixedly sleeved with a plurality of fins, the fins are perpendicular to the length direction of the heat exchange tube, and the fins are arranged in the length direction of the heat exchange tube. According to the utility model, after entering the tank body through the air inlet, waste heat airflow heats the snakelike heat exchange tube and the fins on the outer wall of the heat exchange tube, and then is discharged through the air outlet, so that the heat exchange time is prolonged, the contact area of heat exchange of two media is increased, the heat exchange efficiency is improved, and the waste heat utilization rate of the heating ventilation air conditioner is improved.

Description

Technical Field

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

[0002] The main functions of HVAC include heating, ventilation and air conditioning. HVAC is an important part of residential structures, such as single-family homes, apartment buildings, hotels and retirement facilities; large and medium-sized industrial and office buildings. HVAC can improve indoor air quality, reduce indoor pollution and harmful substances by improving indoor ventilation and regulating temperature; and has the effect of energy conservation and emission reduction.

[0003] In traditional HVAC systems, a large amount of waste heat is discharged into the environment during the cooling and heating process, which not only causes energy waste, but also increases the heat load of the environment. In order to improve this situation, improve energy efficiency, and reduce building energy consumption, HVAC waste heat utilization technology has emerged. The core of HVAC waste heat utilization is to convert heat energy that was originally regarded as waste into a reusable resource. Through a series of technical means and equipment, such as heat pumps, heat accumulators, heat recovery devices, etc., the recovery, storage and utilization of this waste heat can be achieved.

[0004] In the prior art, the waste heat of HVAC is transported to the heat transfer equipment using heat exchange technology so that the waste heat energy can be effectively recovered and utilized; however, during the rapid circulation of the waste heat airflow, the heat exchange time of the two media is short and the heat exchange contact area is small, resulting in low heat exchange efficiency and low waste heat utilization rate. Utility Model Content

[0005] In order to solve the technical problems that the heat exchange time between two media in the existing HVAC waste heat utilization device is short, the heat exchange contact area is small, resulting in low heat exchange efficiency and low waste heat utilization rate, the utility model provides a HVAC waste heat utilization device.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A HVAC waste heat utilization device includes a tank body, one end of the tank body is provided with an air inlet, and the other end is provided with an air outlet; a heat exchange tube is arranged inside the tank body, the heat exchange tube is arranged in a serpentine shape, the two ends of the heat exchange tube pass through the side wall of the tank body, and the outer wall of the heat exchange tube is fixedly sleeved with a plurality of fins, the fins are arranged perpendicular to the length direction of the heat exchange tube, and the plurality of fins are arranged along the length direction of the heat exchange tube. In the present application, after the waste heat flows into the tank body through the air inlet, the serpentine heat exchange tube and the fins on the outer wall of the heat exchange tube are heated, and then discharged through the air outlet, which increases the heat exchange time and the contact area of ​​the heat exchange between the two media, improves the efficiency of the heat exchange, and improves the waste heat utilization rate of the HVAC.

[0008] As a preferred implementation of a HVAC waste heat utilization device, the fins are circular, and the circular fins are coaxially arranged with the heat exchange tubes.

[0009] As a preferred implementation of a HVAC waste heat utilization device, the side wall of the tank body is provided with a plurality of assembly holes, which are arranged along the length direction of the tank body; the heat exchange tube includes a plurality of U-shaped tubes, which are arranged along the length direction of the tank body, and the plurality of U-shaped tubes are located inside the tank body, and the fins are located on the outer wall of the U-shaped tubes, and both ends of each U-shaped tube extend out of the tank body through the assembly holes; the heat exchange tube includes a plurality of connecting tubes, which are located outside the tank body, and each connecting tube connects the adjacent end openings on two adjacent U-shaped tubes; the inner wall of the tank body is fixedly connected with a plurality of baffles, each of which is located between two adjacent U-shaped tubes, and there is a gap between one side of the baffle and the inner wall of the tank body, and the plurality of baffles are mutually displaced. Under the action of the baffles, the waste heat airflow inside the tank body can form a fixed flow path, and the waste heat airflow can fully and effectively heat the U-shaped tubes and fins on the flow path.

[0010] As a preferred implementation of a HVAC waste heat utilization device, a support plate is provided inside the tank body, the two sides of the support plate in the length direction are fixedly connected to the inner wall of the tank body, and there is a gap between the two sides in the width direction and the inner wall of the tank body, the support plate is located on the side of the heat exchange tube close to the air inlet, and the support plate is connected to the side of the air inlet; one side of the guide plate is connected to the wide side of the support plate, and the other side is inclined toward the air inlet. The two guide plates are symmetrically arranged in the width direction of the support plate, and the two guide plates are connected to each other on the side inclined toward the air inlet. The guide plate can evenly disperse the waste heat airflow from the air inlet, so that the waste heat airflow evenly heats the U-shaped tube and the fins, and avoids the waste heat airflow from locally impacting the U-shaped tube.

[0011] As a preferred implementation of a HVAC waste heat utilization device, a retention mechanism is provided inside the tank body, and the retention mechanism is located on the side of the heat exchanger close to the air outlet. The retention mechanism includes a partition, and the outer wall of the partition is seamlessly connected to the inner wall of the tank body, and the partition has a plurality of air holes. After the waste heat airflow reaches the top of the tank body, the waste heat airflow must pass through the air holes to reach the position of the air outlet, forming resistance to the waste heat airflow, increasing the heat exchange time, and improving the utilization rate of the waste heat.

[0012] As a preferred implementation of a HVAC waste heat utilization device, the side of the partition facing the air outlet is connected to one end of the annular plate, the air hole is opened in the middle of the partition, the annular plate surrounds the area where the air hole is located, the end of the annular plate facing the air outlet is in contact with the cover plate, the side of the cover plate away from the air outlet is connected to the sliding rod, the sliding rod passes through the partition, and a spring is sleeved on the outside of the sliding rod, one end of the spring is connected to the cover plate, and the other end is connected to the partition. After the waste heat airflow reaches the top of the tank body, it flows into the space between the annular plate and the cover plate through the air hole and is blocked by the cover plate. As the air pressure inside the tank body continues to increase, the waste heat airflow can overcome the elastic force of the spring, so that the sliding rod drives the cover plate to move upward, and the cover plate is separated from the annular plate. The waste heat airflow can flow out from between the annular plate and the cover plate, and then be discharged from the air outlet pipe, thereby increasing the heat exchange time and improving the utilization rate of the waste heat.

[0013] As a preferred implementation of a HVAC waste heat utilization device, a limit block is provided at one end of the slide bar away from the air outlet, and the size of the limit block is larger than the outer diameter of the slide bar. The limit block can limit the slide bar to prevent the slide bar from detaching from the partition under the action of the waste heat airflow.

[0014] As a preferred implementation of a HVAC waste heat utilization device, the air inlet is connected to the air inlet pipe, and the air outlet is connected to the air outlet pipe.

[0015] As a preferred implementation of a HVAC waste heat utilization device, the connecting pipe is arc-shaped.

[0016] As a preferred implementation of a HVAC waste heat utilization device, the tank body is a cylinder, and the end faces at both ends of the tank body are arc surfaces.

[0017] The beneficial effects of the utility model include:

[0018] In the utility model, after the waste heat flows into the tank body through the air inlet, the serpentine heat exchange tube and the fins on the outer wall of the heat exchange tube are heated, and then discharged through the air outlet, thereby increasing the heat exchange time and the contact area of ​​the heat exchange between the two media, improving the efficiency of the heat exchange, and improving the waste heat utilization rate of the HVAC. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a HVAC waste heat utilization device proposed by the utility model;

[0021] Figure 2 This is a schematic cross-sectional structure diagram of a HVAC waste heat utilization device proposed by the utility model;

[0022] Figure 3 A heating and air conditioning waste heat utilization device proposed by the utility model Figure 2 A schematic diagram of the enlarged structure of part A in the figure.

[0023] List of parts and reference numerals:

[0024] 1. Tank body; 2. Air inlet pipe; 3. Air outlet pipe; 4. Profile pipe; 5. Connecting pipe; 6. Assembly plate; 7. Fin; 8. Baffle; 9. Partition; 10. Air hole; 11. Ring plate; 12. Cover plate; 13. Slide rod; 14. Spring; 15. Limit block; 16. Support plate; 17. Guide plate. DETAILED DESCRIPTION

[0025] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the utility model will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] Reference Figure 1-3 This embodiment proposes a HVAC waste heat utilization device, including a tank body 1, which is a cylinder, and the end faces of both ends of the tank body 1 are arc surfaces. An air inlet is opened at one end in the length direction of the tank body 1, and an air outlet is opened at the other end. The air inlet is connected to the air inlet pipe 2, and the air outlet is connected to the air outlet pipe 3. The side wall of the tank body 1 is opened with a plurality of assembly holes, and the plurality of assembly holes are arranged along the length direction of the tank body 1. The side wall of the tank body 1 is installed with a plurality of assembly plates 6, and the plurality of assembly plates 6 are arranged along the length direction of the tank body 1. The assembly plates 6 are opened with openings corresponding to the positions of the assembly holes.

[0027] The tank body 1 is provided with a heat exchange tube inside. The heat exchange tube is arranged in a serpentine shape. The two ends of the heat exchange tube pass through the side wall of the tank body 1. The two ends of the heat exchange tube are respectively the water inlet and the water outlet. The heat exchange tube includes a plurality of U-shaped tubes 4. The plurality of U-shaped tubes 4 are arranged along the length direction of the tank body 1. The plurality of U-shaped tubes 4 are located inside the tank body 1. The outer wall of the U-shaped tube 4 is fixedly sleeved with a plurality of fins 7. The fins 7 are circular. The circular fins 7 are coaxially arranged with the U-shaped tube 4. The fins 7 are arranged perpendicular to the length direction of the U-shaped tube 4. The plurality of fins 7 are arranged along the length direction of the U-shaped tube 4. The fins 7 can increase the heat exchange area of ​​the U-shaped tube 4. Both ends of each U-shaped tube 4 pass through the assembly hole, extend out of the tank body 1, and are connected to the assembly plate 6, and then extend out through the opening on the assembly plate 6. The upper port of the uppermost U-shaped tube 4 is the water outlet, and correspondingly, the lower port of the lowermost U-shaped tube 4 is the water inlet. The heat exchange tube also includes a plurality of connecting tubes 5, which are arc-shaped and located outside the tank body 1. Each connecting tube 5 is connected to adjacent end openings of two adjacent U-shaped tubes 4. The inner wall of the tank body 1 is fixedly connected with a plurality of baffles 8, each baffle 8 is located between two adjacent U-shaped tubes 4, and there is a gap between one side of the baffle 8 and the inner wall of the tank body 1. The plurality of baffles 8 are mutually offset. Under the action of the baffles 8, the waste heat airflow in the tank body 1 can form a fixed flow path, and the waste heat airflow can fully and effectively heat the U-shaped tubes 4 and the fins 7 on the flow path.

[0028] A support plate 16 is provided inside the tank body 1. The two sides of the support plate 16 in the length direction are fixedly connected to the inner wall of the tank body 1. There is a gap between the two sides in the width direction and the inner wall of the tank body 1. The support plate 16 is located on the side of the heat exchange tube close to the air inlet. Two guide plates 17 are connected to the side of the support plate 16 facing the air inlet. One side of the guide plate 17 is connected to the wide side of the support plate 16, and the other side is inclined toward the air inlet. The two guide plates 17 are symmetrically arranged in the width direction of the support plate 16, and the two guide plates 17 are connected to each other on the side inclined toward the air inlet. The guide plate 17 can evenly disperse the waste heat airflow from the air inlet, so that the waste heat airflow evenly heats the U-shaped tube 4 and the fin 7, and avoids the waste heat airflow from locally impacting the U-shaped tube 4.

[0029] A stop mechanism is provided inside the tank body 1. The stop mechanism is located on the side of the heat exchanger close to the gas outlet. The stop mechanism includes a partition 9. The outer wall of the partition 9 is seamlessly connected to the inner wall of the tank body 1. The partition 9 is provided with a plurality of air holes 10. The side of the partition 9 facing the gas outlet is connected to one end of the annular plate 11. The air holes 10 are provided in the middle of the partition 9. The annular plate 11 surrounds the area where the air holes 10 are located. The end of the annular plate 11 facing the gas outlet is in contact with the cover plate 12. The side of the cover plate 12 away from the gas outlet is connected to the slide bar 13. The slide bar 13 passes through the partition 9. A spring 14 is sleeved on the outside of the slide bar 13. One end of the spring 14 is connected to the cover plate 12, and the other end is connected to the partition 9. A stop block 15 is provided at the end of the slide bar 13 away from the gas outlet. The size of the stop block 15 is larger than the outer diameter of the slide bar 13.

[0030] The working principle of this embodiment is:

[0031] When in use, the waste heat of the HVAC is transported to the air inlet pipe 2 through the existing fan to form a waste heat airflow. After the waste heat airflow enters the tank body 1, it is evenly dispersed through the guide plate 17, and then forms a fixed flow path under the guiding effect of the baffle 8, and the U-shaped tube 4 and the fin 7 on the flow path are fully and effectively heated, thereby heating the heat exchange medium in the U-shaped tube 4. After the waste heat airflow reaches the upper part of the tank body 1, it flows into the space between the annular plate 11 and the cover plate 12 through the air hole 10, and is blocked by the cover plate 12. As the air pressure inside the tank body 1 continues to increase, the waste heat airflow can overcome the elastic force of the spring 14, so that the slide bar 13 drives the cover plate 12 to move upward, and the cover plate 12 is separated from the annular plate 11. The waste heat airflow can flow out from between the annular plate 11 and the cover plate 12, and then be discharged from the air outlet pipe 3, thereby improving the utilization rate of the waste heat.

[0032] In this embodiment, the heat exchange medium enters from one end of the bottom U-shaped tube 4, then passes through the middle U-shaped tube 4 through the connecting tube 5, and is discharged from one end of the top U-shaped tube 4. The heat exchange medium can be water, oil or other fluids.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heating, ventilation and air conditioning waste heat utilization device, comprising a tank body (1), characterized in that: An air inlet is provided at one end of the tank body (1) in the length direction, and an air outlet is provided at the other end; a heat exchange tube is provided inside the tank body (1), the heat exchange tube is arranged in a serpentine shape, and both ends of the heat exchange tube pass through the side wall of the tank body (1); a plurality of fins (7) are fixedly sleeved on the outer wall of the heat exchange tube, the fins (7) are arranged perpendicular to the length direction of the heat exchange tube, and the plurality of fins (7) are arranged along the length direction of the heat exchange tube.

2. A HVAC waste heat utilization device according to claim 1, characterized in that: The fin (7) is circular, and the circular fin (7) is coaxially arranged with the heat exchange tube.

3. A HVAC waste heat utilization device according to claim 1, characterized in that: The side wall of the tank body (1) is provided with a plurality of assembly holes, and the plurality of assembly holes are arranged along the length direction of the tank body (1); the heat exchange tube comprises a plurality of U-shaped tubes (4), the plurality of U-shaped tubes (4) are arranged along the length direction of the tank body (1), the plurality of U-shaped tubes (4) are located inside the tank body (1), the fins (7) are located on the outer wall of the U-shaped tubes (4), and both ends of each U-shaped tube (4) extend out of the tank body (1) through the assembly holes; the heat exchange tube comprises a plurality of connecting tubes (5), the plurality of connecting tubes (5) are located outside the tank body (1), and each connecting tube (5) is connected to adjacent end openings of two adjacent U-shaped tubes (4); the inner wall of the tank body (1) is fixedly connected with a plurality of baffles (8), each baffle (8) is located between two adjacent U-shaped tubes (4), a gap is provided between one side of the baffle (8) and the inner wall of the tank body (1), and the plurality of baffles (8) are mutually offset.

4. A HVAC waste heat utilization device according to claim 1 or 3, characterized in that: A support plate (16) is provided inside the tank body (1); two sides of the support plate (16) in the length direction are fixedly connected to the inner wall of the tank body (1); a gap is provided between the two sides in the width direction and the inner wall of the tank body (1); the support plate (16) is located on a side of the heat exchange tube close to the air inlet; two guide plates (17) are connected to the side of the support plate (16) facing the air inlet; one side of the guide plate (17) is connected to the wide side of the support plate (16); the other side is inclined in the direction of the air inlet; the two guide plates (17) are symmetrically arranged in the width direction of the support plate (16); the sides of the two guide plates (17) inclined towards the air inlet are connected to each other.

5. A HVAC waste heat utilization device according to claim 1 or 3, characterized in that: A retention mechanism is provided inside the tank body (1), and the retention mechanism is located on a side of the heat exchanger close to the gas outlet. The retention mechanism comprises a partition (9), the outer wall of the partition (9) is seamlessly connected to the inner wall of the tank body (1), and the partition (9) is provided with a plurality of air holes (10).

6. A HVAC waste heat utilization device according to claim 5, characterized in that: The side of the partition (9) facing the air outlet is connected to one end of the annular plate (11), the air hole (10) is opened in the middle of the partition (9), the annular plate (11) surrounds the area where the air hole (10) is located, the end of the annular plate (11) facing the air outlet is in contact with the cover plate (12), the side of the cover plate (12) away from the air outlet is connected to the slide rod (13), the slide rod (13) passes through the partition (9), and a spring (14) is sleeved on the outside of the slide rod (13), one end of the spring (14) is connected to the cover plate (12), and the other end is connected to the partition (9).

7. A HVAC waste heat utilization device according to claim 6, characterized in that: A limit block (15) is provided at one end of the slide bar (13) away from the air outlet, and the size of the limit block (15) is larger than the outer diameter of the slide bar (13).

8. The HVAC waste heat utilization device according to claim 1, characterized in that: The air inlet is connected to the air inlet pipe (2), and the air outlet is connected to the air outlet pipe (3).

9. The HVAC waste heat utilization device according to claim 3, characterized in that: The connecting pipe (5) is arc-shaped.

10. The HVAC waste heat utilization device according to claim 1, characterized in that: The tank body (1) is a cylinder, and the end faces at both ends of the tank body (1) are arc surfaces.

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