Fresh air system heat exchange equipment

Abstract

The utility model relates to a kind of fresh air system heat exchange equipment, belong to fresh air system technical field, including fresh air unit, fresh air unit connection air supply pipeline and exhaust duct, air supply pipeline end is equipped with multiple air supply ports, exhaust duct end is equipped with multiple air outlet;Fresh air unit inside is sequentially installed with filter device, surface cooler, heating device and fan from front to back;Surface cooler is connected with the steam condensing heat exchanger in workshop, steam condensing heat exchanger is connected with workshop high-temperature steam pipeline;Fresh air system heat exchange equipment described in the utility model, air in central control room is extracted to the inside of fresh air unit by exhaust duct, after filtering by filter device, preliminary heat exchange heating is carried out with surface cooler, after heating by heating device, along air supply pipeline and send back to central control room;The utility model can reduce the operation energy consumption of fresh air system in winter heating, reduce dependence on electric heating mode, reduce operating cost, ensure heating effect and comfort.

Description

Technical Field

[0001] This utility model relates to a heat exchange device for a fresh air system, belonging to the technical field of fresh air systems. Background Technology

[0002] Traditional central control room fresh air systems use electric heating to directly convert electrical energy into heat energy to heat the fresh air. Its main drawbacks are high energy consumption and expensive operating costs, especially in extremely cold regions or large systems. It may also lead to overheating risks and pose certain safety hazards. Therefore, a more energy-efficient and economical heating method is needed. Utility Model Content

[0003] Based on the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a heat exchange device for a fresh air system that can reduce the operating energy consumption of the fresh air system for winter heating, reduce reliance on electric heating, and reduce operating costs while ensuring heating effect and comfort.

[0004] The heat exchange equipment for the fresh air system described in this utility model includes a fresh air unit, which is connected to an air supply duct and an exhaust duct. The air supply duct has multiple air inlets at its end, and the exhaust duct has multiple air outlets at its end. The air inlets are located at the lower part of the central control room, and the air outlets are located at the upper part of the central control room. The fresh air unit contains, from front to back, a filter, a surface cooler, a heating device, and a fan. The surface cooler is connected to a steam condensing heat exchanger in the workshop, and the steam condensing heat exchanger is connected to a high-temperature steam pipeline in the workshop.

[0005] The technical solution of this utility model is to provide a heat exchange device for a fresh air system. The fresh air unit draws air from the central control room into the fresh air unit through the exhaust duct. After being filtered by the filter device, the air undergoes preliminary heat exchange with the surface cooler to raise the temperature. After passing through the heating device, the air is sent back to the central control room along the air supply duct.

[0006] Preferably, the surface cooler is provided with an inlet and an outlet, both of which are connected to a steam condensing heat exchanger via pipes. An electric valve is provided on the pipe connecting the inlet to the steam condensing heat exchanger, and a water pump is provided on the pipe connecting the outlet to the steam condensing heat exchanger. The water pump continuously circulates the circulating water in the pipes. After the circulating water exchanges heat with the high-temperature steam in the workshop and is heated, it flows into the surface cooler to exchange heat with the air entering the fresh air unit and heat it up.

[0007] Preferably, the fresh air unit includes a housing, an air inlet at the front end of the housing connected to an exhaust duct, a fresh air inlet at the rear end of the housing, and an air outlet at the top of the housing connected to a supply duct.

[0008] Furthermore, both the air inlet and the fresh air outlet are equipped with proportional regulating valves to adjust the mixing ratio of the incoming air and the fresh air. A filter is installed at the front end of the fresh air outlet to filter the fresh air entering the fresh air unit, so as to ensure the cleanliness of the fresh air.

[0009] Preferably, the filtration device is a pre-filter used to filter and purify the air.

[0010] Preferably, the heating device is an electric heating element, and there are multiple sets of electric heating elements; a temperature sensor is also installed on the equipment housing, located above the fresh air inlet, for detecting the temperature of the supplied air; the heating device can adjust the heating power according to the temperature of the supplied air to meet the temperature requirements of the supplied air.

[0011] The advantages of this utility model compared with the prior art are: The heat exchange equipment for the fresh air system described in this utility model draws air from the central control room into the fresh air unit through the exhaust duct. After being filtered by the filter device, the air undergoes preliminary heat exchange with the surface cooler to raise its temperature. After being heated by the heating device, the air is then sent back to the central control room along the supply air duct. This utility model can reduce the operating energy consumption of the fresh air system for winter heating, reduce reliance on electric heating, lower operating costs, and ensure heating effect and comfort. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the working principle of this utility model; Figure 2 This is a structural diagram of a fresh air handling unit.

[0013] In the diagram: 1. Steam condensing heat exchanger; 2. Water pump; 3. Fresh air handling unit; 4. Electric valve; 5. Air outlet; 6. Air supply duct; 7. Air outlet; 8. Air exhaust duct; 9. Equipment housing; 10. Air outlet; 11. Temperature sensor; 12. Filter; 13. Fresh air inlet; 14. Fan; 15. Heating device; 16. Surface cooler; 17. Water inlet; 18. Filter device; 19. Air inlet; 20. Proportional regulating valve; 21. Water outlet. Detailed Implementation

[0014] like Figure 1-2 As shown, this embodiment is achieved through the following technical solution: it includes a fresh air unit 3, which is connected to an air supply duct 6 and an exhaust duct 8. The air supply duct 6 has multiple air supply outlets 5 at its end, and the exhaust duct 8 has multiple exhaust outlets 7 at its end. The air supply outlets 5 are located at the lower part of the central control room, and the exhaust outlets 7 are located at the upper part of the central control room. The fresh air unit 3 is equipped with a filter device 18, a surface cooler 16, a heating device 15, and a fan 14 in sequence from front to back. The surface cooler 16 is connected to a steam condensing heat exchanger 1 in the workshop, and the steam condensing heat exchanger 1 is connected to a high-temperature steam pipeline in the workshop.

[0015] In this embodiment, the surface cooler 16 is provided with an inlet 17 and an outlet 21. Both the inlet 17 and the outlet 21 are connected to the steam condensing heat exchanger 1 through pipes. An electric valve 4 is provided on the pipe connecting the inlet 17 and the steam condensing heat exchanger 1, and a water pump 2 is provided on the pipe connecting the outlet 21 and the steam condensing heat exchanger 1. The water pump 2 makes the circulating water in the pipe continuously circulate. After the circulating water exchanges heat with the high-temperature steam in the workshop in the steam condensing heat exchanger 1 and is heated, it flows into the surface cooler 16 and exchanges heat with the air entering the fresh air unit 3, thus raising its temperature.

[0016] The fresh air handling unit 3 includes a housing 9. An air inlet 19 is located at the front end of the housing 9, connected to an exhaust duct 8. A fresh air inlet 13 is located at the rear end of the housing 9, communicating with the outside atmosphere. An air outlet 10 is located at the top of the housing 9, connected to a supply air duct 6. Both the air inlet 19 and the fresh air inlet 13 are equipped with proportional regulating valves 20 to adjust the mixing ratio of incoming and fresh air. A filter 12 is installed at the front end of the fresh air inlet 13 to filter the fresh air entering the fresh air handling unit 3, ensuring the cleanliness of the fresh air. The filter device 18 is a pre-filter used for filtering and purifying the air.

[0017] The heating device 15 is an electric heating tube, and there are multiple sets of electric heating tubes; a temperature sensor 11 is also installed on the equipment housing 9. The temperature sensor 11 is located above the fresh air inlet 13 and is used to detect the temperature of the supplied air; both the heating device 15 and the temperature sensor 11 are electrically connected to the control system, which is model ECS-7000MKT; the heating device 15 and the temperature sensor 11 are linked and can adjust the heating power according to the temperature of the supplied air to meet the temperature requirements of the supplied air.

[0018] The working process of this utility model is as follows: Air in the central control room is collected through exhaust vent 7 and enters the fresh air unit 3 through exhaust duct 8. It is first filtered by filter device 18, then passes through surface cooler 16, where it undergoes preliminary heat exchange with the circulating water in surface cooler 16 to raise its temperature. Then, it passes through heating device 15 and is discharged from air outlet 10 under the traction of fan 14. It flows along air supply duct 6 and is finally sent back to the central control room through air supply outlet 5. When air flows through the heating device 15, the heating device 15 can adjust the heating power according to the air supply temperature detected by the temperature sensor 11 to regulate the air temperature: if the temperature detected by the temperature sensor 11 is higher than the set temperature, the heating power is reduced; if the temperature detected by the temperature sensor 11 is lower than the set temperature, the heating power is increased.

[0019] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A heat exchange device for a fresh air system, characterized in that, The system includes a fresh air handling unit (3), which is connected to an air supply duct (6) and an exhaust duct (8). The air supply duct (6) has multiple air supply outlets (5) at its end, and the exhaust duct (8) has multiple exhaust outlets (7) at its end. The fresh air handling unit (3) is equipped with a filter device (18), a surface cooler (16), a heating device (15), and a fan (14) in sequence from front to back. The surface cooler (16) is connected to a steam condensing heat exchanger (1) in the workshop. The surface cooler (16) is provided with an inlet (17) and an outlet (21), and both the inlet (17) and the outlet (21) are connected to the steam condensing heat exchanger (1) through pipes.

2. The heat exchange equipment for a fresh air system according to claim 1, characterized in that, An electric valve (4) is provided on the connecting pipe between the water inlet (17) and the steam condensing heat exchanger (1), and a water pump (2) is provided on the connecting pipe between the water outlet (21) and the steam condensing heat exchanger (1).

3. The heat exchange equipment for a fresh air system according to claim 1, characterized in that, The fresh air unit (3) includes a housing (9), an air inlet (19) at the front end of the housing (9) and an exhaust pipe (8) connected to the air inlet (19), a fresh air inlet (13) at the rear end of the housing (9), and an air outlet (10) at the top of the housing (9) and an air supply pipe (6) connected to the air supply pipe (6).

4. The heat exchange equipment for a fresh air system according to claim 3, characterized in that, Both the air inlet (19) and the fresh air inlet (13) are equipped with proportional regulating valves (20), and a filter (12) is installed at the front end of the fresh air inlet (13).

5. The heat exchange equipment for a fresh air system according to claim 3, characterized in that, The heating device (15) is an electric heating tube, and there are multiple sets of electric heating tubes; a temperature sensor (11) is also installed on the equipment housing (9), and the temperature sensor (11) is located above the fresh air inlet (13).

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