A rotary dehumidifier

Abstract

The application discloses a rotary dehumidifier. It comprises a fresh air channel, a return air channel and an outdoor air channel, a dehumidifying rotary wheel is arranged between the fresh air channel and the return air channel, a first heat exchanger and a second heat exchanger are arranged in the fresh air channel on the front and back sides of the dehumidifying rotary wheel respectively, a third heat exchanger is arranged in the return air channel on the front side of the dehumidifying rotary wheel, and a fourth heat exchanger is arranged in the outdoor air channel; one end of the first heat exchanger and the second heat exchanger is connected with one end of a four-way reversing valve, the other end of the first heat exchanger and the second heat exchanger is connected with one end of a first electronic expansion valve and a second electronic expansion valve respectively, the other end of the first electronic expansion valve and the second electronic expansion valve is connected with one end of a third electronic expansion valve and a fourth electronic expansion valve respectively, and the other end of the third electronic expansion valve and the fourth electronic expansion valve is connected with one end of the third heat exchanger and the fourth heat exchanger respectively. The application can meet the temperature and humidity requirements in the whole year while saving energy and reducing consumption.

Description

Technical Field

[0001] This invention relates to the field of dehumidification and air conditioning technology, specifically to a rotary dehumidifier. Background Technology

[0002] In the field of air handling, the dehumidification methods currently on the market are basically condensation low-temperature dehumidification and traditional rotary dehumidification. However, condensation low-temperature dehumidification requires extremely low temperatures and loses a lot of energy (and in special places, heating is also required to regulate the temperature). Traditional rotary dehumidification (silica gel, molecular sieve) requires high temperatures of 100℃-150℃ to achieve the dehumidification effect, which consumes a lot of energy and can only be used in industry and is not suitable for civilian use.

[0003] Therefore, we need to use more advanced energy-saving and low-carbon dehumidification technologies than we currently have. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a rotary dehumidifier.

[0005] To achieve the above objectives, the present invention provides a rotary dehumidifier, comprising a housing, wherein the interior of the housing is divided by two partitions to form a fresh air duct, a return air duct, and an outdoor air duct. A fresh air inlet, an exhaust outlet, and an outdoor air outlet are sequentially provided on one side of the fresh air duct, the return air duct, and the outdoor air duct, and an air supply outlet, a return air inlet, and an outdoor air inlet are sequentially provided on the other side. A blower, a return air fan, and an outdoor fan are sequentially provided inside the fresh air duct, the return air duct, and the outdoor air duct.

[0006] A dehumidifying impeller is provided between the fresh air duct and the return air duct. A first heat exchanger and a second heat exchanger are respectively provided in the fresh air duct on both sides of the dehumidifying impeller, and a third heat exchanger is provided in the return air duct on the front side of the impeller. A fourth heat exchanger is provided in the outdoor air duct.

[0007] One end of each of the first and second heat exchangers is connected to one end of a four-way reversing valve. The other ends of the first and second heat exchangers are respectively connected to one end of a first electronic expansion valve and a second electronic expansion valve. The other ends of the first and second electronic expansion valves are each connected to one end of a third electronic expansion valve and a fourth electronic expansion valve. The other ends of the third and fourth electronic expansion valves are respectively connected to one end of a third heat exchanger and a fourth heat exchanger. The other ends of the third and fourth heat exchangers are each connected to one end of a four-way reversing valve. The other two ends of the four-way reversing valve are respectively connected to the suction port and the discharge port of the compressor.

[0008] Furthermore, a first bypass ventilation valve is provided in the fresh air duct, which is located between the dehumidification rotor and the housing.

[0009] Furthermore, a second bypass ventilation valve is provided in the return air duct, and the second bypass ventilation valve is located between the dehumidification rotor and the partition.

[0010] Furthermore, the fresh air inlet and the exhaust air outlet are respectively equipped with a fresh air valve and an exhaust air valve.

[0011] Furthermore, a third bypass ventilation valve is provided on the partition between the return air duct and the outdoor air duct. The third bypass ventilation valve is located between the return air inlet and the third heat exchanger in the return air duct, and between the outdoor air inlet and the fourth heat exchanger in the outdoor air duct.

[0012] Furthermore, a fourth bypass ventilation valve is provided on the partition between the fresh air duct and the return air duct. The fourth bypass ventilation valve is located between the fresh air inlet and the first heat exchanger in the fresh air duct, and between the exhaust outlet and the dehumidification rotor in the return air duct.

[0013] Furthermore, the compressor is a variable frequency compressor and it is installed in the outdoor air duct.

[0014] Furthermore, the supply fan, return fan, and outdoor fan are all variable air volume (VAV) fans.

[0015] Beneficial effects: In summer, this invention can use a two-stage combined treatment of refrigeration dehumidification and rotary dehumidification to deeply dehumidify fresh air. In winter, it can use rotary humidification and heat pump heating to treat fresh air to the required temperature and humidity. Under extreme loads, when using 100% fresh air cannot meet the supply air parameter requirements, a partial fresh air and partial return air treatment method can be adopted. When deep dehumidification is not required in the transition season, only refrigeration dehumidification is used to treat fresh air, while exhaust air is used to reduce the condensation temperature of the refrigeration dehumidification system, thus meeting the temperature and humidity requirements throughout the year while saving energy and reducing consumption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the rotary dehumidifier according to an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the airflow direction of the rotary dehumidifier in summer or winter according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the airflow direction of the rotary dehumidifier under extreme conditions according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the airflow direction of the rotary dehumidifier in a certain working mode during the transition season, according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the airflow direction of the rotary dehumidifier in another working mode during the transition season, according to an embodiment of the present invention. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solutions of the present invention, and it should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0022] like Figure 1 As shown, this embodiment of the invention provides a rotary dehumidifier, including a housing 100. The interior of the housing 100 is divided by two partitions 200 to form a fresh air duct 300, a return air duct 400, and an outdoor air duct 500. Fresh air inlets and supply air outlets are respectively provided on both sides of the fresh air duct 300. Return air inlets and exhaust air outlets are respectively provided on both sides of the return air duct 400. Outdoor air inlets and outdoor air outlets are respectively provided on both sides of the outdoor air duct 500. The fresh air inlets, exhaust air outlets, and outdoor air outlets are respectively located on the same side of the fresh air duct 300, return air duct 400, and outdoor air duct 500, while the supply air inlets, return air inlets, and outdoor air inlets are respectively located on the other side of the fresh air duct 300, return air duct 400, and outdoor air duct 500. A supply fan 9, a return air fan 18, and an outdoor fan 16 are sequentially arranged within the fresh air duct 300, return air duct 400, and outdoor air duct 500. Variable air volume (VAV) fans are preferred for supply fan 9, return air fan 18 and outdoor fan 16.

[0023] A dehumidifying impeller 6, made of polymer, is installed between the fresh air duct 300 and the return air duct 400. A first heat exchanger 3 is installed in the fresh air duct 300 in front of the dehumidifying impeller 6, and a second heat exchanger 7 is installed in the fresh air duct 300 behind the dehumidifying impeller 6. A third heat exchanger 10 is installed in the return air duct 400 in front of the dehumidifying impeller 6. A fourth heat exchanger 12 is installed in the outdoor air duct 500.

[0024] In this configuration, one end of the first heat exchanger 3 and the second heat exchanger 7 are both connected to one end of the four-way reversing valve 14. The other ends of the first heat exchanger 3 and the second heat exchanger 7 are respectively connected to one end of the first electronic expansion valve 4 and the second electronic expansion valve 8. The other ends of the first electronic expansion valve 4 and the second electronic expansion valve 8 are both connected to one end of the third electronic expansion valve 20 and the fourth electronic expansion valve 13. The other ends of the third electronic expansion valve 20 and the fourth electronic expansion valve 13 are respectively connected to one end of the third heat exchanger 10 and the fourth heat exchanger 12. The other ends of the third heat exchanger 10 and the fourth heat exchanger 12 are both connected to one end of the four-way reversing valve 14. The other two ends of the four-way reversing valve 14 are respectively connected to the suction port and the discharge port of the compressor 15. The compressor 15 is preferably a variable frequency compressor, and it is preferably installed in the outdoor air duct 500. By controlling the operation of the four-way reversing valve 14, the refrigerant flow direction of the entire direct expansion system can be changed, thereby giving the first heat exchanger 3, the second heat exchanger 7, the third heat exchanger 10, and the fourth heat exchanger 12 different functions.

[0025] Preferably, a first bypass ventilation valve 5 is installed in the fresh air duct 300, and the first bypass ventilation valve 5 is located between the dehumidifying impeller 6 and the housing 100. Preferably, a second bypass ventilation valve 19 is installed in the return air duct 400, and the second bypass ventilation valve 19 is located between the dehumidifying impeller 6 and the partition 200. A fresh air valve 1 and an exhaust valve 17 may also be installed at the fresh air inlet and the exhaust air outlet, respectively.

[0026] A third bypass ventilation valve 11 is provided on the partition 200 between the return air duct 400 and the outdoor air duct 500. The third bypass ventilation valve 11 is located between the return air inlet and the third heat exchanger 10 in the return air duct 400, and between the outdoor air inlet and the fourth heat exchanger 12 in the outdoor air duct 500. Preferably, a fourth bypass ventilation valve 2 is provided on the partition 200 between the fresh air duct 300 and the return air duct 400. The fourth bypass ventilation valve 2 is located between the fresh air inlet and the first heat exchanger 3 in the fresh air duct 300, and between the exhaust outlet and the dehumidifying impeller 6 in the return air duct 300.

[0027] like Figure 2As shown, in summer, dehumidification and cooling are required. The fresh air valve 1 and exhaust valve 17 are opened, while the first bypass valve 5, second bypass valve 19, third bypass valve 11, and fourth bypass valve 2 are closed. Outdoor fresh air enters the fresh air duct through fresh air valve 1, first undergoes pre-cooling through the first heat exchanger 3, then is deeply dehumidified by the dehumidifying impeller 6, becoming high-temperature dry air. It is then further cooled by the second heat exchanger 7, adjusted to the required supply air temperature, and delivered to the air-conditioned room by the fresh air fan 9. The room's return air enters the return air duct 400 through the return air inlet, first undergoes heating through the third heat exchanger 10, then passes through the dehumidifying impeller 6, absorbing moisture to become humid air, and is discharged outdoors through the return air fan 18 and exhaust valve 17. Additionally, outdoor fresh air enters the outdoor air duct 500 through the outdoor air duct inlet, flows through the fourth heat exchanger 12, releases condensation heat, and is finally discharged outdoors by the outdoor fan 16. During this period, the four-way reversing valve 12 must not be electrically operated. The high-temperature, high-pressure refrigerant discharged from the compressor 15 enters the third and fourth heat exchangers 10 and 12 via the four-way reversing valve 12. The high-temperature, high-pressure refrigerant releases condensation heat in the third heat exchanger 10, raising the return air temperature to the required regeneration temperature. Simultaneously, excess condensation heat is transferred to the outdoor fresh air via the fourth heat exchanger 12, and the high-temperature, high-pressure refrigerant is cooled into a high-pressure refrigerant liquid. At this time, the third electronic expansion valve 20 and the fourth electronic expansion valve 13 act as flow regulating valves to control the refrigerant flow through the third heat exchanger 10, thereby controlling the heat exchange of the third heat exchanger 10 and obtaining the corresponding regeneration air temperature. The high-pressure refrigerant liquid enters the first heat exchanger 3 and the second heat exchanger 7 via the first electronic expansion valve 4 and the second electronic expansion valve 8, respectively, absorbing heat from the fresh air and being evaporated into a low-pressure refrigerant gas. This gas is then drawn into the compressor 15 via the four-way reversing valve 14, completing the refrigeration cycle.

[0028] In winter, humidification and heating are required. The fresh air valve 1 and exhaust valve 17 are opened, while the first bypass valve 5, second bypass valve 19, third bypass valve 11, and fourth bypass valve 2 are closed. Outdoor fresh air enters the fresh air duct 300 through the fresh air valve 1. It is first preheated by absorbing the condensation heat of the refrigerant in the first heat exchanger 3, then humidified by absorbing moisture from the dehumidifying impeller 6, and then reheated by passing through the second heat exchanger 7 before being delivered to the air-conditioned room by the fresh air fan 9. The room's return air enters the return air duct 400 through the return air vent. It is first cooled by passing through the third heat exchanger 10, then humidified by passing through the dehumidifying impeller 6, where moisture is absorbed and the air becomes dry. It is then discharged outdoors through the return air fan 18 and exhaust valve 17. Additionally, outdoor fresh air enters the outdoor air duct 500 through the outdoor air inlet, flows through the fourth heat exchanger 12, absorbs heat from the air, and is finally discharged outdoors by the outdoor fan 16. During this process, the four-way reversing valve 12 is energized and operates. The high-temperature, high-pressure refrigerant discharged from the compressor 15 enters the first heat exchanger 3 and the second heat exchanger 7 through the four-way reversing valve 12. The high-temperature, high-pressure refrigerant releases condensation heat in the first heat exchanger 3, raising the fresh air temperature to the required regeneration temperature. Simultaneously, the excess condensation heat is used by the second heat exchanger 7 to reheat the outdoor fresh air. The high-temperature, high-pressure refrigerant is cooled into a high-pressure refrigerant liquid. At this time, the first electronic expansion valve 4 and the second electronic expansion valve 8 act as flow regulating valves to control the refrigerant flow in the first heat exchanger 3, thereby controlling the heat exchange capacity of the first heat exchanger 3 and obtaining the corresponding regeneration air temperature. The high-pressure refrigerant liquid enters the third heat exchanger 10 and the fourth heat exchanger 12 through the third electronic expansion valve 20 and the fourth electronic expansion valve 13, respectively, absorbing heat from the return air and evaporating into a low-pressure refrigerant gas. This gas is then drawn into the compressor 15 through the four-way reversing valve 14, completing the heat pump heating cycle.

[0029] like Figure 3 As shown, when encountering extreme outdoor weather parameters or extreme indoor loads, a lower supply air moisture content is required. The exhaust valve 17 and the third bypass valve 11 are closed, while the second bypass ventilation valve 19 and the first bypass ventilation valve 5 are opened. The fresh air valve 1 and the fourth bypass valve 2 are opened and their openings adjusted to ensure that an appropriate amount of outdoor fresh air enters the fresh air duct 300 through the fresh air valve 1 and mixes with an appropriate amount of return air entering the fresh air duct 300 through the second bypass ventilation valve 19 and the fourth bypass valve 2. The mixed air first passes through the first heat exchanger 3, then through the first bypass ventilation valve 5, and then exchanges heat again with the second heat exchanger 7 before being delivered to the air-conditioned room by the fresh air fan 9. The return air fan 18 does not operate. Additionally, outdoor fresh air enters the outdoor air duct 500 through the air inlet of the indoor air duct, flows through the fourth heat exchanger 12, and is finally discharged outdoors by the outdoor fan 16. At this time, the refrigeration system operates as in summer or winter conditions.

[0030] like Figure 4As shown, during the transitional season, when the fresh air load or indoor load decreases, the return air fan 18, exhaust valve 17, fourth bypass valve 2, and second bypass ventilation valve 19 are closed, while the first bypass ventilation valve 5 and third bypass valve 11 are opened. Outdoor fresh air enters the fresh air duct 300 through the fresh air valve 1, first passing through the first heat exchanger 3, then through the first bypass ventilation valve 5, and exchanging heat again with the second heat exchanger 7 before being delivered to the air-conditioned room by the fresh air fan 9. Indoor return air enters the outdoor air duct 500 through the third bypass valve 11, mixes with other outdoor fresh air, and then flows through the fourth heat exchanger 12. Due to the mixing of indoor return air, the air quality in the outdoor air duct is improved, enhancing the performance of the refrigeration system. At the same time, the return air fan 18 does not operate, reducing the overall power consumption. Under these conditions, the refrigeration system operates as it does in summer or winter.

[0031] like Figure 5 As shown, during the transitional season, the system can also operate as follows: Open the fresh air valve 1, exhaust valve 17, first bypass ventilation valve 5, and second bypass ventilation valve 19; close the third bypass valve 11 and fourth bypass valve 2. Outdoor fresh air enters the fresh air duct 300 through the fresh air valve 1, passing sequentially through the first heat exchanger 3, the first bypass ventilation valve 5, and the second heat exchanger 7. The room's return air enters the return air duct 400 through the return air inlet, passing sequentially through the third heat exchanger 10 and the second bypass ventilation valve 19. Additional outdoor fresh air enters the outdoor air duct 500 through the air inlet of the room air duct, flows through the fourth heat exchanger 12, and is finally exhausted outdoors by the outdoor fan 16. In this case, the refrigeration system operates as it does in summer or winter.

[0032] The above description is merely a preferred embodiment of the present invention. It should be noted that for those skilled in the art, other parts not specifically described are existing technology or common knowledge. Several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A rotary dehumidifier, characterized in that, The device includes a housing, the interior of which is divided by two partitions to form a fresh air duct, a return air duct and an outdoor air duct. One side of the fresh air duct, return air duct and outdoor air duct is provided with a fresh air inlet, an exhaust outlet and an outdoor air outlet in sequence, and the other side is provided with an air supply outlet, a return air inlet and an outdoor air inlet in sequence. A blower, a return air fan and an outdoor fan are arranged in sequence inside the fresh air duct, return air duct and outdoor air duct. A dehumidifying impeller is provided between the fresh air duct and the return air duct. A first heat exchanger and a second heat exchanger are respectively provided in the fresh air duct on both sides of the dehumidifying impeller, and a third heat exchanger is provided in the return air duct on the front side of the impeller. A fourth heat exchanger is provided in the outdoor air duct. One end of each of the first and second heat exchangers is connected to one end of a four-way reversing valve. The other ends of the first and second heat exchangers are respectively connected to one end of the first and second electronic expansion valves. The other ends of the first and second electronic expansion valves are each connected to one end of the third and fourth electronic expansion valves. The other ends of the third and fourth electronic expansion valves are respectively connected to one end of the third and fourth heat exchangers. The other ends of the third and fourth heat exchangers are each connected to one end of the four-way reversing valve. The other two ends of the four-way reversing valve are respectively connected to the suction port and discharge port of the compressor. The fresh air duct is equipped with a first bypass ventilation valve, which is located between the dehumidification rotor and the housing. The return air duct is equipped with a second bypass ventilation valve, which is located between the dehumidification rotor and the partition. The fresh air inlet and the exhaust air outlet are respectively equipped with a fresh air valve and an exhaust air valve; A third bypass ventilation valve is provided on the partition between the return air duct and the outdoor air duct. The third bypass ventilation valve is located between the return air inlet and the third heat exchanger in the return air duct, and between the outdoor air inlet and the fourth heat exchanger in the outdoor air duct. A fourth bypass ventilation valve is provided on the partition between the fresh air duct and the return air duct. The fourth bypass ventilation valve is located between the fresh air inlet and the first heat exchanger in the fresh air duct, and between the exhaust outlet and the dehumidification rotor in the return air duct. When encountering extreme outdoor weather parameters or extreme indoor loads, close the exhaust valve and the third bypass valve, open the second bypass ventilation valve and the first bypass ventilation valve, open the fresh air valve and the fourth bypass valve and adjust their opening to ensure that an appropriate amount of outdoor fresh air enters the fresh air duct through the fresh air valve and mixes with an appropriate amount of return air entering the fresh air duct through the second bypass ventilation valve and the fourth bypass valve. The mixed air first passes through the first heat exchanger, then through the first bypass ventilation valve and exchanges heat again with the second heat exchanger, and is then sent into the air-conditioned room by the fresh air fan. The return air fan does not run. Outdoor fresh air enters the outdoor air duct through the air inlet of the indoor air duct, flows through the fourth heat exchanger, and is finally discharged to the outside by the outdoor fan. During the transitional season, the return air fan, exhaust valve, fourth bypass valve, and second bypass ventilation valve are closed, while the first bypass ventilation valve and third bypass valve are opened. Outdoor fresh air enters the fresh air duct through the fresh air valve, first passes through the first heat exchanger, then passes through the first bypass ventilation valve and exchanges heat again with the second heat exchanger, before being delivered to the air-conditioned room by the fresh air fan. Indoor return air enters the outdoor air duct through the third bypass valve, mixes with other outdoor fresh air, and then flows through the fourth heat exchanger. The return air fan is not running.

2. A rotary dehumidifier according to claim 1, characterized in that, The compressor is a variable frequency compressor and it is installed in the outdoor air duct.

3. A rotary dehumidifier according to claim 1, characterized in that, The supply fan, return fan, and outdoor fan are all variable air volume (VAV) fans.

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