Heat pump type fresh air heat recovery device

Abstract

The invention discloses a heat pump type fresh air heat recovery device which comprises a total heat exchanger, an air supply box and an air exhaust box, a fresh air inlet, an air supply outlet, an air return inlet and an air exhaust outlet are formed in the periphery of the total heat exchanger, and the air supply box is provided with an air feeder, a flow equalizing plate I and an evaporator. The exhaust box is provided with an exhaust fan, a flow equalizing plate II, a flow equalizing plate III, a first condenser, a second condenser, an air pipe and a compressor, a fresh air inlet and an exhaust outlet are in butt joint with outdoor air, a return air inlet is connected with indoor return air, and an air supply outlet is connected with an indoor air supply pipeline; outdoor fresh air enters the air supply box through the fresh air inlet, sequentially passes through the flow equalizing plate I and the evaporator and enters the air supply outlet through the air feeder. Indoor return air enters the exhaust box through the return air inlet, sequentially passes through the flow equalizing plate II, the first condenser, the flow equalizing plate III and the second condenser, and enters the exhaust outlet through the exhaust fan; the air outlet is connected with an air pipe at the same time, the air pipe penetrates through the flow equalizing plate III and the second condenser, and an opening is formed between the first condenser and the flow equalizing plate III. The condensing pressure of the condenser is reduced, fresh air is introduced for condensation, the air volume is increased, the pressure is reduced, and the heat exchange efficiency of the condenser is improved.

Description

Technical Field

[0001] The present invention relates to the field of fresh air technology, and in particular to a heat pump type fresh air heat recovery device. Background Art

[0002] The fresh air heat recovery device maximizes energy utilization by optimizing the operation strategy of the compressor and fan. The intelligent control of fresh air is to adjust the working state of the heat pump in real time according to the indoor and outdoor temperature and humidity through the use of sensors and control systems to achieve the best energy efficiency ratio. Multi-energy integration: integration with other energy systems (such as solar energy) to further improve the energy efficiency and reliability of the system.

[0003] Patent 202323186125.1 discloses a heat recovery device that realizes automatic start and stop and real-time monitoring, which can improve energy utilization efficiency and save energy. However, the current form of bypass ventilation reduces the condensing pressure of the condenser. Due to the reduced pressure, the pressure difference between the evaporator and the compressor is reduced, resulting in a reduction in compressor power, thereby reducing the efficiency of the compressor. Summary of the invention

[0004] The invention discloses a heat pump type fresh air heat recovery device, which reduces the condensation pressure of a condenser, introduces fresh air for condensation, increases the air volume, reduces its pressure, and improves the heat exchange efficiency of the condenser.

[0005] The present invention is achieved through the following technical solutions: A heat pump type fresh air heat recovery device comprises a total heat exchanger, an air supply box and an exhaust box. A fresh air inlet, an air supply outlet, a return air inlet and an exhaust outlet are respectively arranged around the total heat exchanger. The air supply box is provided with an air supply fan, a flow equalizing plate I and an evaporator. The exhaust box is provided with an exhaust fan, a flow equalizing plate II, a flow equalizing plate III, a first condenser, a second condenser, an air duct and a compressor. The fresh air inlet and the exhaust outlet are connected to outdoor air, the return air inlet is connected to indoor return air, and the air supply outlet is connected to the indoor air supply duct; outdoor fresh air enters the air supply box through the fresh air inlet, passes through the flow equalizing plate I and the evaporator in turn, and enters the air supply outlet through the air supply fan; indoor return air enters the exhaust box through the return air inlet, passes through the flow equalizing plate II, the first condenser, the flow equalizing plate III and the second condenser in turn, and enters the exhaust outlet through the exhaust fan; the exhaust outlet is connected to the air duct at the same time, the air duct passes through the flow equalizing plate III and the second condenser, and opens between the first condenser and the flow equalizing plate III.

[0006] An air duct is set at the exhaust port as a bypass pipe for the second condenser. In heat recovery of heat pump type, the condenser will have insufficient condensation and poor heat dissipation in the later stage. When some units are exchanging heat in the condenser, the heat exchange temperature difference between them is close to 1 degree. The bypass pipe effectively solves the problem. The purpose of the bypass pipe is to reduce the condensation pressure of the condenser, introduce some fresh air for condensation, reduce its pressure and improve heat exchange efficiency.

[0007] Furthermore, an electric air volume regulating valve I and an electric air volume regulating valve II are respectively provided at the return air inlet and the air duct outlet.

[0008] Furthermore, a controller is installed between the electric air volume regulating valve I and the electric air volume regulating valve II to control the coordination of the regulating valves.

[0009] Electric air volume regulating valve I controls exhaust air, and electric air volume regulating valve II controls the introduced bypass air. A slight positive pressure in the room is achieved through the regulation and control of the two valves. Since the air valves work in coordination, the return air volume is not greater than the supply air volume, and at the same time, the air volume greater than the supply air volume is discharged from the exhaust port.

[0010] Further, the compressor is arranged between the exhaust fan and the second condenser.

[0011] Beneficial Effects 1. A heat pump type fresh air heat recovery device of the present invention can improve the heat exchange efficiency: by introducing fresh air into the second condenser, the bypass pipe helps to reduce the condensation pressure of the condenser. This enables the condenser to work at a lower pressure, thereby improving the heat exchange efficiency.

[0012] 2. The heat pump type fresh air heat recovery device of the present invention solves the problem of insufficient condensation: when the system runs for a long time or the external conditions change, the condensation effect may decrease. By using a bypass pipe, the problem of insufficient condensation in the later stage can be effectively solved to ensure the stable operation of the system.

[0013] 3. A heat pump type fresh air heat recovery device of the present invention maintains a slight positive pressure in the room: by precisely controlling two electric air volume regulating valves, the system can maintain a slight positive pressure state in the room, which helps prevent external pollutants from entering the room and improve the indoor air quality.

[0014] 4. A heat pump type fresh air heat recovery device of the present invention is collaboratively controlled to ensure air volume balance: the controller in the system adjusts the opening of the two air volume regulating valves to ensure that the return air volume does not exceed the supply air volume, and the additional air volume is discharged from the exhaust port, thereby achieving higher energy efficiency and comfort.

[0015] 5. The heat pump type fresh air heat recovery device of the present invention can flexibly respond to different working conditions: through precise control of the air volume regulating valve, the system can flexibly adapt to different working environments and requirements, such as automatically adjusting when the external temperature changes greatly to maintain optimal operating efficiency and comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a heat pump type fresh air heat recovery device; 1. Total heat exchanger, 2. Fresh air inlet, 3. Supply air outlet, 4. Return air inlet, 5. Exhaust outlet, 6. Supply fan, 7. Exhaust fan, 8. Flow equalizing plate I, 9. Flow equalizing plate II, 10. Flow equalizing plate III, 11. Evaporator, 12. First condenser, 13. Second condenser, 14. Electric air volume regulating valve I, 15. Electric air volume regulating valve II, 16. Air duct, 17. Compressor. DETAILED DESCRIPTION

[0017] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0018] Example 1 Schematic diagram of heat pump type fresh air heat recovery device Figure 1 .

[0019] A heat pump type fresh air heat recovery device comprises a total heat exchanger 1, an air supply box and an exhaust box. A fresh air inlet 2, an air supply outlet 3, a return air inlet 4 and an exhaust outlet 5 are arranged around the total heat exchanger 1. The air supply box is provided with an air supply fan 6, a flow equalizing plate I 8 and an evaporator 11. The exhaust box is provided with an exhaust fan 7, a flow equalizing plate II 9, a flow equalizing plate III 10, a first condenser 12, a second condenser 13, an air duct 16 and a compressor 17.

[0020] The fresh air inlet 2 and the exhaust port 5 are connected to the outdoor air, the return air inlet 4 is connected to the indoor return air, and the air supply port 3 is connected to the indoor air supply duct; the outdoor fresh air enters the air supply box through the fresh air inlet 2, passes through the equalizer plate I8, the evaporator 11 in sequence, and enters the air supply port 3 through the air supply fan 6; the indoor return air enters the exhaust box through the return air inlet 4, passes through the equalizer plate II9, the first condenser 12, the equalizer plate III10, the second condenser 13 in sequence, and enters the exhaust port 5 through the exhaust fan 7; the exhaust port 5 is also connected to the air duct 16, which passes through the equalizer plate III10 and the second condenser 13, and opens between the first condenser 12 and the equalizer plate III10. The compressor 17 is arranged between the exhaust fan 7 and the second condenser 13.

[0021] The return air inlet and the air duct outlet are respectively provided with an electric air volume regulating valve Ⅰ14 and an electric air volume regulating valve Ⅱ15, and a controller is installed between the electric air volume regulating valve Ⅰ and the electric air volume regulating valve Ⅱ. The electric air volume regulating valve Ⅰ controls the exhaust air, and the electric air volume regulating valve Ⅱ controls the introduced bypass air. The slight positive pressure in the room is achieved by regulating and controlling the two valves to ensure that the return air volume is not greater than the supply air volume, and at the same time ensure that the air volume greater than the supply air volume is discharged from the exhaust port.

[0022] During operation: fresh air is introduced into the air supply box through the fresh air inlet 2, and is transported to the room after absorbing heat at the evaporator 11. At the same time, the return air enters the exhaust box from the return air inlet 4, and first exchanges heat with the first condenser 12. At this time, the heat exchange efficiency of the first condenser is very high. Subsequently, the electric air volume regulating valve II 15 is opened to mix the heated exhaust air with the fresh air, further reducing the temperature of the exhaust air, thereby ensuring the heat exchange efficiency of the second condenser 13. Finally, the treated air is discharged to the outside.

[0023] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A heat pump type fresh air heat recovery device, comprising a total heat exchanger (1), an air supply box and an exhaust box, wherein the total heat exchanger (1) is provided with a fresh air inlet (2), an air supply outlet (3), a return air inlet (4) and an exhaust outlet (5) respectively around the total heat exchanger (1), the air supply box is provided with an air supply fan (6), a flow equalizing plate I (8), and an evaporator (11), the exhaust box is provided with an exhaust fan (7), a flow equalizing plate II (9), a flow equalizing plate III (10), a first condenser (12), a second condenser (13), an air duct (16), and a compressor (17), It is characterized in that The fresh air inlet (2) and the exhaust outlet (5) are connected to outdoor air, the return air inlet (4) is connected to indoor return air, and the supply air outlet (3) is connected to the indoor supply air duct; the outdoor fresh air enters the supply air box through the fresh air inlet (2), passes through the flow equalizing plate I (8), the evaporator (11), and enters the supply air outlet (3) through the supply air fan (6); the indoor return air enters the exhaust air box through the return air inlet (4), passes through the flow equalizing plate II (9), the first condenser (12), the flow equalizing plate III (10), the second condenser (13), and enters the exhaust outlet (5) through the exhaust fan (7); the exhaust outlet (5) is also connected to the air duct (16), which passes through the flow equalizing plate III (10) and the second condenser (13) and opens between the first condenser (12) and the flow equalizing plate III (10).

2. A heat pump type fresh air heat recovery device according to claim 1, It is characterized in that The return air inlet and the air duct outlet are respectively provided with an electric air volume regulating valve I (14) and an electric air volume regulating valve II (15).

3. A heat pump type fresh air heat recovery device according to claim 2, It is characterized in that A controller is installed between the electric air volume regulating valve I (14) and the electric air volume regulating valve II (15).

4. A heat pump type fresh air heat recovery device according to claim 1, It is characterized in that The compressor (17) is arranged between the exhaust fan (7) and the second condenser (13).

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