Heating and ventilation heat exchanger structure

Abstract

The utility model discloses a heating and ventilation heat exchanger structure which comprises a shell. An indoor air return pipe is arranged at the front end in the shell, an outdoor fresh air pipe is arranged at the rear end in the shell, air holes are formed in the outer arc face of the indoor air return pipe and the outer arc face of the outdoor fresh air pipe, first semicircular air pipes are arranged on the outer arc face of the outdoor fresh air pipe, and first heat exchange pipes are arranged at openings in the left ends of the first semicircular air pipes. A first heat exchange pipe is arranged at an opening in the right end of the first semi-circular-ring air pipe, a second heat exchange pipe is arranged at an opening in the right end of the first semi-circular-ring air pipe, the front end of the first heat exchange pipe and the front end of the second heat exchange pipe are fixedly connected with an indoor air return pipe, and a second semi-circular-ring air pipe is arranged on the outer arc face of the indoor air return pipe. The air flow path is prolonged in the limited space, the heat exchange time and contact area of air in the heating and ventilation heat exchanger are increased, and the heat exchange efficiency of the heating and ventilation heat exchanger is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a HVAC heat exchanger structure. Background Art

[0002] HVAC is an integral part of a building. It not only includes heating, ventilation and air conditioning, but also involves public facilities systems such as building water supply and drainage, gas supply, as well as the design, construction, commissioning, operation and management capabilities of building heat supply systems and building energy conservation. In the process of HVAC, in order to avoid heat waste caused by direct discharge of indoor air, a heat exchanger is often used to exchange heat between indoor return air and outdoor fresh air, reduce heat waste and ensure indoor temperature. In the prior art, during the heat exchange process, an air induced component is used to make air flow in the heat exchanger. Due to the temperature difference between the air in the return air duct and the air in the fresh air duct, heat exchange will occur between the air in the return air duct and the air in the fresh air duct during the air flow process, and the heat is recycled. However, the flow of air in the heat exchanger needs to consider space issues. In order to avoid the overall footprint being too large, the air flows in the heat exchanger for a short time, which easily affects the heat exchange efficiency of the heat exchanger. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a HVAC heat exchanger structure to accurately guide the flow path of air in the HVAC heat exchanger, extend the flow path of air in a limited space, increase the time and contact area of ​​air heat exchange inside the HVAC heat exchanger, improve the heat exchange efficiency of the HVAC heat exchanger, and effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a HVAC heat exchanger structure, including a shell;

[0005] Shell: The front end of the shell is provided with an indoor return air duct, the rear end of the shell is provided with an outdoor fresh air duct, the outer arc surface of the indoor return air duct and the outer arc surface of the outdoor fresh air duct are provided with air holes, the outer arc surface of the outdoor fresh air duct is provided with a semi-circular air duct 1, the left end opening of the semi-circular air duct 1 is provided with a heat exchange tube 1, the right end opening of the semi-circular air duct 1 is provided with a heat exchange tube 2, the front ends of the heat exchange tube 1 and the heat exchange tube 2 are fixedly connected to the indoor return air duct, the outer arc surface of the indoor return air duct is provided with a semi-circular air duct 2, the left end of the semi-circular air duct 2 is provided with a heat exchange tube 1, and the left end of the semi-circular air duct 2 is provided with a heat exchange tube 2. A heat exchange tube four is provided at each opening, a heat exchange tube three is provided at the right end opening of the semicircular air duct two, the rear ends of the heat exchange tube four and the heat exchange tube three are fixedly connected to the outdoor fresh air duct, the heat exchange tube one, the heat exchange tube two, the heat exchange tube four and the heat exchange tube three are respectively connected to the air holes, the flow path of the air in the HVAC heat exchanger is accurately guided, the flow path of the air is extended in a limited space, the time and contact area of ​​the air for heat exchange inside the HVAC heat exchanger are increased, and the heat exchange efficiency of the HVAC heat exchanger is improved.

[0006] Furthermore, the heat exchange tube 1, the heat exchange tube 2, the heat exchange tube 4 and the heat exchange tube 3 are arranged and distributed in sequence from left to right, so as to facilitate heat exchange of the air during the flow process.

[0007] Furthermore, the inner arc surfaces of the indoor return air duct and the outdoor fresh air duct are respectively provided with baffles, and the heat exchange tube one, heat exchange tube two, heat exchange tube four and heat exchange tube three are all installed in cooperation with the baffles to guide the flow path of the air.

[0008] Furthermore, a control switch is provided on the front surface of the shell, and an input end of the control switch is electrically connected to an external power supply to control the start and stop of the entire device.

[0009] Furthermore, the left ends of the indoor return air duct and the outdoor fresh air duct are both provided with electric fans, and the input end of the electric fan is electrically connected to the output end of the control switch to provide power for the flow of air.

[0010] Furthermore, an air filter is inserted into the socket on the right side of the shell, and the air filter passes through the filter sockets in the middle of heat exchange tube one and heat exchange tube two, and the air filter passes through the yield holes in the middle of heat exchange tube four and heat exchange tube three to filter outdoor fresh air.

[0011] Furthermore, a heat insulating pad is provided on the inner wall of the shell to reduce the influence of the external temperature on the heat exchange process.

[0012] Compared with the prior art, the beneficial effects of the utility model are: the HVAC heat exchanger structure has the following advantages:

[0013] When in use, the electric fan is started by controlling the switch to discharge indoor air to the outside through the indoor return air duct, and outdoor fresh air enters the room through the outdoor fresh air duct. During the air flow, the return air is blocked by the baffle and flows along the heat exchange tube four, the semi-circular air duct two and the heat exchange tube three, and the fresh air flows along the heat exchange tube one, the semi-circular air duct one and the heat exchange tube two, so as to perform heat exchange between the outdoor fresh air and the indoor return air. During the heat exchange process, the heat conduction of the heat exchange tube one, the heat exchange tube two, the heat exchange tube four and the heat exchange tube three is utilized so that the air flow process can also perform heat exchange, the flow path of the air in the HVAC heat exchanger is accurately guided, the air flow path is extended in a limited space, the time and contact area of ​​the air for heat exchange in the HVAC heat exchanger are increased, and the heat exchange efficiency of the HVAC heat exchanger is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the overall device of the utility model in a top view;

[0016] Figure 3 It is a schematic diagram of the structure of a partial explosion of the overall device of the utility model.

[0017] In the figure: 1 shell, 2 indoor return air duct, 3 outdoor fresh air duct, 4 air hole, 5 semicircular air duct one, 6 heat exchange tube one, 7 heat exchange tube two, 8 semicircular air duct two, 9 heat exchange tube three, 10 heat exchange tube four, 11 baffle, 12 control switch, 13 electric fan, 14 air filter, 15 insulation pad. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 ,This embodiment provides a technical solution: a HVAC heat exchanger structure, including a shell 1;

[0020] Shell 1: An indoor return air duct 2 is provided at the front end thereof to provide space for the discharge of indoor air, an outdoor fresh air duct 3 is provided at the rear end thereof to provide space for the entry of outdoor air, air holes 4 are provided on the outer arc surfaces of the indoor return air duct 2 and the outdoor fresh air duct 3, semicircular air ducts 1 5 are provided on the outer arc surfaces thereof, heat exchange tubes 1 6 are provided at the left end openings of the semicircular air ducts 1 5, heat exchange tubes 2 7 are provided at the right end openings of the semicircular air ducts 1 5, front ends of the heat exchange tubes 1 6 and the heat exchange tubes 2 7 are fixedly connected to the indoor return air duct 2, semicircular air ducts 2 8 are provided on the outer arc surfaces thereof, heat exchange tubes 4 10 are provided at the left end openings of the semicircular air ducts 2 8, and heat exchange tubes 10 are provided at the right end openings of the semicircular air ducts 2 8 The rear ends of heat exchange tube four 10 and heat exchange tube three 9 are fixedly connected to the outdoor fresh air duct 3, and heat exchange tube one 6, heat exchange tube two 7, heat exchange tube four 10 and heat exchange tube three 9 are respectively connected to the air hole 4. During the air flow, the air inside the indoor return air duct 2 enters the heat exchange tube four 10 from the air hole 4, and then returns to the indoor return air duct 2 through the semi-circular air duct two 8 and heat exchange tube three 9 in turn. At the same time, the air in the outdoor fresh air duct 3 enters the heat exchange tube one 6 from the air hole 4, and then returns to the outdoor fresh air duct 3 through the semi-circular air duct one 5 and heat exchange tube two 7 in turn, so that the air in the outdoor fresh air duct 3 exchanges heat with the air in the indoor return air duct 2. The heat exchange tube four 10 and the heat exchange tube three 9 are arranged in sequence from left to right. Because the heat exchange tube one 6, the heat exchange tube two 7, the heat exchange tube four 10 and the heat exchange tube three 9 are in contact with each other, the heat exchange process of the air flow can also be carried out through the heat conduction of the heat exchange tube one 6, the heat exchange tube two 7, the heat exchange tube four 10 and the heat exchange tube three 9, thereby increasing the heat exchange time and contact area. The inner arc surfaces of the indoor return air duct 2 and the outdoor fresh air duct 3 are respectively provided with baffles 11, and the heat exchange tube one 6, the heat exchange tube two 7, the heat exchange tube four 10 and the heat exchange tube three 9 are all installed in conjunction with the baffles 11 to block the flow path of the air. A control switch 12 is provided on the front surface of the shell 1, and the input end of the control switch 12 is electrically connected to an external power supply to control the overall device. Start and stop, the left ends of the indoor return air duct 2 and the outdoor fresh air duct 3 are each provided with an electric fan 13, the input end of the electric fan 13 is electrically connected to the output end of the control switch 12, providing power for the flow of air, an air filter 14 is plugged into the jack on the right side of the shell 1, the air filter 14 passes through the filter jacks in the middle of the heat exchange tube 1 6 and the heat exchange tube 2 7 respectively, the air filter 14 passes through the concession holes in the middle of the heat exchange tube 4 10 and the heat exchange tube 3 9 respectively, so that the fresh air flowing in the heat exchange tube 1 6 and the heat exchange tube 2 7 contacts with the air filter 14, and the fiber air filter 14 is used to filter the fresh air, and the inner wall of the shell 1 is provided with an insulation pad 15, the insulation pad 15 is an insulation rubber pad, which reduces the influence of the external temperature on the heat exchange process.

[0021] The working principle of a HVAC heat exchanger structure provided by the utility model is as follows: when in use, the electric fan 13 is started by the control switch 12 to make the air flow, the indoor air is discharged to the outside through the indoor return air duct 2, and the outdoor fresh air enters the room through the outdoor fresh air duct 3. During the air flow, the air inside the indoor return air duct 2 enters the heat exchange tube 4 10 from the air hole 4 due to the obstruction of the baffle 11, and then returns to the indoor return air duct 2 through the semi-circular air duct 2 8 and the heat exchange tube 3 9 in turn. At the same time, the air in the outdoor fresh air duct 3 enters the room from the air hole 4. The air enters the heat exchange tube 1 6, and then returns to the outdoor fresh air duct 3 through the semicircular air duct 1 5 and the heat exchange tube 2 7 in turn, so that the air in the outdoor fresh air duct 3 exchanges heat with the air in the indoor return air duct 2. During the heat exchange process, because the heat exchange tube 1 6, the heat exchange tube 2 7, the heat exchange tube 4 10 and the heat exchange tube 3 9 are in contact with each other, the heat exchange process of the air can also be carried out through the heat conduction of the heat exchange tube 1 6, the heat exchange tube 2 7, the heat exchange tube 4 10 and the heat exchange tube 3 9, thereby increasing the heat exchange time and contact area, and improving the heat exchange efficiency.

[0022] It is worth noting that the electric fan 13 disclosed in the above embodiment can be freely configured according to the actual application scenario. It is recommended to use a 6028 model guide fan. The control switch 12 is provided with a switch button corresponding to the electric fan 13 for controlling its switching operation.

[0023] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A HVAC heat exchanger structure, characterized in that: comprising a housing (1); The housing (1) is provided with an indoor return air duct (2) at its front end, and an outdoor fresh air duct (3) at its rear end. Air holes (4) are provided on the outer arc surfaces of the indoor return air duct (2) and the outdoor fresh air duct (3). Semicircular air ducts (5) are provided on the outer arc surfaces of the outdoor fresh air duct (3). Heat exchange pipes (6) are provided at the left end openings of the semicircular air ducts (5). Heat exchange pipes (7) are provided at the right end openings of the semicircular air ducts (5). The front ends of the heat exchange pipes (6) and the heat exchange pipes (7) are The indoor return air duct (2) is fixedly connected to the indoor return air duct (2). The outer arc surface of the indoor return air duct (2) is respectively provided with a semi-circular air duct two (8). The left end opening of the semi-circular air duct two (8) is provided with a heat exchange pipe four (10). The right end opening of the semi-circular air duct two (8) is provided with a heat exchange pipe three (9). The rear ends of the heat exchange pipe four (10) and the heat exchange pipe three (9) are fixedly connected to the outdoor fresh air duct (3). The heat exchange pipe one (6), the heat exchange pipe two (7), the heat exchange pipe four (10) and the heat exchange pipe three (9) are respectively connected to the air hole (4).

2. A HVAC heat exchanger structure according to claim 1, characterized in that: The heat exchange tube one (6), the heat exchange tube two (7), the heat exchange tube four (10) and the heat exchange tube three (9) are arranged in sequence from left to right.

3. A HVAC heat exchanger structure according to claim 1, characterized in that: The inner arc surfaces of the indoor return air duct (2) and the outdoor fresh air duct (3) are respectively provided with baffles (11), and the heat exchange tube 1 (6), the heat exchange tube 2 (7), the heat exchange tube 4 (10) and the heat exchange tube 3 (9) are all installed in cooperation with the baffles (11).

4. A HVAC heat exchanger structure according to claim 1, characterized in that: A control switch (12) is provided on the front surface of the housing (1), and an input end of the control switch (12) is electrically connected to an external power source.

5. A HVAC heat exchanger structure according to claim 4, characterized in that: An electric fan (13) is provided at the left end of each of the indoor return air duct (2) and the outdoor fresh air duct (3); an input end of the electric fan (13) is electrically connected to an output end of the control switch (12).

6. A HVAC heat exchanger structure according to claim 1, characterized in that: An air filter (14) is inserted into the insertion hole on the right side of the shell (1), and the air filter (14) passes through the filter insertion holes in the middle of the heat exchange tube 1 (6) and the heat exchange tube 2 (7), and the air filter (14) passes through the clearance holes in the middle of the heat exchange tube 4 (10) and the heat exchange tube 3 (9).

7. A HVAC heat exchanger structure according to claim 1, characterized in that: The inner wall of the shell (1) is provided with a heat insulation pad (15).

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