Double-heat-pump composite dehumidification system

Abstract

The utility model discloses a double-heat-pump composite dehumidification system. The low-temperature heat pump is provided with a first fan, a second fan, a low-temperature condenser and a low-temperature evaporator, the high-temperature heat pump is provided with a high-temperature condenser and a high-temperature evaporator, and the dehumidification rotating wheel is provided with a rotating wheel processing area and a rotating wheel regeneration area. The treatment air entering the second fan sequentially passes through the low-temperature evaporator and the rotating wheel treatment area and then is conveyed to a user side; and regenerated air entering the first fan sequentially passes through the low-temperature condenser, the high-temperature condenser and the runner regeneration area, then enters the high-temperature evaporator to provide a heat source for the high-temperature heat pump and then is discharged. The system has the advantages that on the basis that the deep dehumidification requirement is met, regenerated air is further heated through the high-temperature heat pump system, electric heating before the regenerated air enters the regeneration area of the rotating wheel is omitted, and the system efficiency is also improved.

Description

Technical Field

[0001] This utility model relates to a dehumidification system, and more particularly to a dual heat pump composite dehumidification system. Background Technology

[0002] A heat pump is a device that efficiently transfers heat. It moves heat from low to medium-high temperatures by consuming a small amount of high-grade energy, offering significant energy savings compared to conventional electric heating and playing a crucial role in the rational use of energy. Water vapor in the air affects human comfort and industrial production processes, and can corrode some building structures and equipment; therefore, dehumidification technology is indispensable across various industries.

[0003] In fields such as medical and precision instruments, humidity control is even more stringent, falling under the category of deep dehumidification technology. Current technologies, particularly conventional dehumidification systems, often employ a single dehumidification method and fail to meet the requirements for deep dehumidification.

[0004] Although heat pump dehumidification systems have emerged that can meet relatively strict humidity requirements, these systems still require electric heating before the regenerated air enters the rotary regeneration zone to heat the regenerated air to a sufficiently high temperature. Furthermore, the regenerated air is directly discharged after passing through the rotary regeneration zone, resulting in a certain degree of heat waste. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a dual heat pump composite dehumidification system that can not only meet the dehumidification requirements, but also reuse the regenerated air discharged from the rotor regeneration zone, eliminate the need for electric heating, and improve the overall energy efficiency of the system.

[0006] To solve the above-mentioned technical problems, the present invention provides a dual heat pump composite dehumidification system comprising a low-temperature heat pump with a No. 1 fan, a No. 2 fan, a low-temperature condenser, and a low-temperature evaporator; a high-temperature heat pump with a high-temperature condenser and a high-temperature evaporator; and a dehumidification rotor with a rotor processing zone and a rotor regeneration zone. The processing air entering the No. 2 fan passes sequentially through the low-temperature evaporator and the rotor processing zone before being delivered to the user end. The regeneration air entering the No. 1 fan passes sequentially through the low-temperature condenser, the high-temperature condenser, and the rotor regeneration zone before entering the high-temperature evaporator to provide a heat source for the high-temperature heat pump before being discharged.

[0007] The low-temperature heat pump also includes a low-temperature liquid storage tank and a low-temperature expansion valve connected between the low-temperature condenser and the low-temperature evaporator.

[0008] The high-temperature heat pump also includes a high-temperature liquid receiver located at the rear end of the high-temperature condenser and a high-temperature expansion valve located at the rear end of the high-temperature liquid receiver.

[0009] The regenerated air passes through the No. 1 air duct in sequence, passing through the No. 1 fan, low-temperature condenser, high-temperature condenser, rotary regeneration zone, and high-temperature evaporator.

[0010] The processing air passes through the No. 2 fan, the low-temperature evaporator, and the rotary processing area in sequence via the No. 2 air duct.

[0011] The rear end of the second air duct is equipped with an aftercooler for cooling.

[0012] The low-temperature heat pump uses a refrigerant with a low boiling point, while the high-temperature heat pump uses a refrigerant with a high boiling point.

[0013] Advantages of this utility model:

[0014] (1) The heat of the regenerated air in the dehumidification wheel regeneration zone is recycled by using a high-temperature heat pump. On the basis of meeting the requirements of deep dehumidification, the regenerated air is further heated by the high-temperature heat pump system to meet the temperature requirements of the regenerated air. In particular, a high-temperature heat pump is set between the low-temperature heat pump and the dehumidification wheel, which eliminates the need for electric heating of the regenerated air before it enters the dehumidification wheel regeneration zone and also improves the system efficiency.

[0015] (2) The regenerated air that has passed through the rotor regeneration zone is reconnected to the high-temperature heat pump and discharged as the heat source of the high-temperature heat pump. Although the temperature of the regenerated air will decrease after passing through the rotor regeneration zone, it is still very high compared with the ambient temperature. Direct discharge will cause a certain degree of energy waste. Energy waste is avoided by secondary utilization.

[0016] (3) An aftercooler is installed between the rotary processing area and the user end. The cooling function of the aftercooler can avoid discomfort or equipment damage caused by excessively high processing air temperature, while also ensuring the user end's performance and meeting the needs of diverse usage scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the dual heat pump composite dehumidification system of this utility model. Detailed Implementation

[0018] The dual heat pump composite dehumidification system of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] The dual heat pump composite dehumidification system of this utility model includes a low-temperature heat pump, a high-temperature heat pump, and a dehumidification impeller; the low-temperature heat pump includes a low-temperature compressor 1, a first fan 2 that drives regeneration air, a second fan 6 that drives treatment air, a low-temperature condenser 3, a low-temperature evaporator 7, a low-temperature liquid receiver 4, and a low-temperature expansion valve 5; the high-temperature heat pump includes a high-temperature compressor 8, a high-temperature condenser 9, a high-temperature evaporator 12, a high-temperature liquid receiver 10, and a high-temperature expansion valve 11; the dehumidification impeller includes two parts: an impeller treatment zone 13 and an impeller regeneration zone 14.

[0020] The outlet end of the cryogenic compressor 1 is connected to the inlet end of the cryogenic condenser 3, the outlet end of the cryogenic condenser 3 is connected to the inlet end of the cryogenic liquid receiver 4, the outlet end of the cryogenic liquid receiver 4 is connected to the inlet end of the cryogenic expansion valve 5, the outlet end of the cryogenic expansion valve 5 is connected to the inlet end of the cryogenic evaporator 7, and the outlet end of the cryogenic evaporator 7 is connected to the inlet end of the cryogenic compressor 1; the outlet end of the high-temperature compressor 8 is connected to the inlet end of the high-temperature condenser 9, the outlet end of the high-temperature condenser 9 is connected to the inlet end of the high-temperature liquid receiver 10, and the outlet end of the high-temperature liquid receiver 10 is connected to the inlet end of the high-temperature liquid receiver 10. The outlet end is connected to the inlet end of the high-temperature expansion valve 11, the outlet end of the high-temperature expansion valve 11 is connected to the inlet end of the high-temperature evaporator 12, and the outlet end of the high-temperature evaporator 12 is connected to the inlet end of the high-temperature compressor 8; the regenerated air passes through the first air duct 16 in sequence through the first fan 2, the low-temperature condenser 3, the high-temperature condenser 9, the rotary regeneration zone 14, and the high-temperature evaporator 12; the processed air passes through the second air duct 17 in sequence through the second fan 6, the low-temperature evaporator 7, and the rotary processing zone 13, and the rear end of the second air duct 17 is provided with an aftercooler 15 for cooling.

[0021] The regenerated air driven by fan 2 passes sequentially through the low-temperature condenser 3, which provides initial heating, the high-temperature condenser 9, which provides further heating, and the rotary regeneration zone 14. Finally, it enters the high-temperature evaporator 12 as a heat source for the high-temperature heat pump before being discharged. The processing air driven by fan 6 first enters the low-temperature evaporator 7, which achieves pre-cooling and refrigeration dehumidification, and then enters the rotary processing zone 13, which achieves adsorption dehumidification. Finally, after temperature measurement, it is directly delivered to the user end if it meets the requirements. If the temperature is higher than the usage requirements, it is cooled by the aftercooler 15 before being delivered to the user end, passing through the rotary wheel to the user end. The dehumidification rotary wheel rotates continuously during the dehumidification process. After the silica gel desiccant becomes saturated, it rotates to the regeneration zone for regeneration.

[0022] As can be seen from the above schemes, both low-temperature heat pumps and high-temperature heat pumps are actually heat pump structures composed of a compressor, a condenser, a liquid receiver, an expansion valve, and an evaporator. Taking the low-temperature heat pump as an example, the working fluid is compressed into a high-temperature, high-pressure gas by the low-temperature compressor 1, then condensed into a high-pressure liquid by the low-temperature condenser 3, and then enters the low-temperature liquid receiver 4. The liquid in the low-temperature liquid receiver 4 is throttled by the low-temperature expansion valve 5 and becomes a low-pressure two-phase flow. Then it enters the low-temperature evaporator 7 to absorb heat and evaporate into gas, and then enters the low-temperature compressor 1 for compression cycle. The cycle principle of the high-temperature heat pump is the same as above, but the working fluid used is higher in boiling point than that of the low-temperature heat pump working fluid to meet the higher condensation temperature requirements.

Claims

1. A dual heat pump composite dehumidification system, characterized in that: The system includes a low-temperature heat pump with a No. 1 fan (2), a No. 2 fan (6), a low-temperature condenser (3) and a low-temperature evaporator (7), a high-temperature heat pump with a high-temperature condenser (9) and a high-temperature evaporator (12), and a dehumidifying rotor with a rotor processing area (13) and a rotor regeneration area (14); the processing air entering the No. 2 fan (6) passes through the low-temperature evaporator (7) and the rotor processing area (13) in sequence and is then delivered to the user end; the regeneration air entering the No. 1 fan (2) passes through the low-temperature condenser (3), the high-temperature condenser (9) and the rotor regeneration area (14) in sequence and then enters the high-temperature evaporator (12) to provide a heat source for the high-temperature heat pump before being discharged.

2. The dual heat pump composite dehumidification system according to claim 1, characterized in that: The low-temperature heat pump also includes a low-temperature liquid storage tank (4) and a low-temperature expansion valve (5) connected between the low-temperature condenser (3) and the low-temperature evaporator (7).

3. The dual heat pump composite dehumidification system according to claim 1 or 2, characterized in that: The high-temperature heat pump also includes a high-temperature liquid receiver (10) located at the rear end of the high-temperature condenser (9) and a high-temperature expansion valve (11) located at the rear end of the high-temperature liquid receiver (10).

4. The dual heat pump composite dehumidification system according to claim 3, characterized in that: The regenerated air passes through the No. 1 air duct (16) in sequence through the No. 1 fan (2), the low-temperature condenser (3), the high-temperature condenser (9), the rotary regeneration zone (14), and the high-temperature evaporator (12).

5. The dual heat pump composite dehumidification system according to claim 1, 2 or 4, characterized in that: The processing air passes through the No. 2 air duct (17) and sequentially through the No. 2 fan (6), the low-temperature evaporator (7), and the rotary processing area (13).

6. The dual heat pump composite dehumidification system according to claim 5, characterized in that: The rear end of the second air duct (17) is equipped with an aftercooler (15) for cooling.

7. The dual heat pump composite dehumidification system according to claim 6, characterized in that: The low-temperature heat pump uses a refrigerant with a low boiling point, while the high-temperature heat pump uses a refrigerant with a high boiling point.

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