Energy-saving air conditioning system utilizing rotating wheel for pre-dehumidification and waste heat regeneration

Abstract

The invention provides an energy-saving air conditioning system utilizing rotating wheel pre-dehumidification waste heat regeneration, and relates to the field of refrigeration air conditioners, the energy-saving air conditioning system comprises a dehumidification rotating wheel shell, a regeneration functional area and a fresh air treatment functional area, the regeneration functional area and the fresh air treatment functional area are connected with the dehumidification rotating wheel shell, and the regeneration functional area comprises a regeneration fan, a condenser, a regeneration area and a regeneration air duct which are communicated in sequence. The fresh air processing functional area comprises a fresh air fan and an air return duct which are connected in parallel with the dehumidification area, and further comprises a gas-liquid heat exchanger, an evaporator and an air supply duct which are communicated with the dehumidification area in sequence, the dehumidification area and the regeneration area are fixed in the dehumidification rotating wheel shell in a sealed mode, and the dehumidification area and the regeneration area are rotationally arranged in the rotating wheel shell; the dehumidification area and the regeneration area are provided with a large number of through holes which are not communicated with each other, and the inner walls of the through holes are coated with low-temperature regeneration dehumidifiers. In this way, the energy consumption of air conditioner operation can be reduced, the low-temperature regeneration dehumidizer can be recycled, accumulated dust is reduced, bacterium breeding is reduced, and the cleanliness of air conditioner exhaust is improved.

Description

Technical Field

[0001] The invention relates to the field of refrigeration and air conditioning, and in particular to an energy-saving air conditioning system utilizing rotary wheel pre-dehumidification waste heat regeneration. Background Art

[0002] At present, most centralized all-air single-return central air conditioning systems use the cooling and dehumidification-dry heating treatment method in summer working conditions, which will produce a large amount of condensed water on the surface of the air conditioner. The condensation latent heat of condensed water accounts for about 40% of the total enthalpy drop of the air in the surface cooler, resulting in an increase in the cooling capacity required by the air conditioner and a poor energy-saving effect. The condensed water condenses into a water film attached to the surface of the surface cooler, which increases the heat transfer resistance by about 5%, reduces the COP of the air conditioning refrigeration cycle, and reduces the efficiency. In addition, the condensed water increases the humidity inside the air conditioning system, making it easier to accumulate dust and breed bacteria, resulting in a decrease in the cleanliness of the air conditioner. Therefore, the current treatment route of the centralized all-air single-return central air conditioning system has poor energy-saving effect and cleanliness.

[0003] To this end, an energy-saving air-conditioning system that utilizes the waste heat of rotary pre-dehumidification to regenerate has been developed, which can reduce the energy consumption of air-conditioning operation, recycle the low-temperature regenerated dehumidifier, reduce dust accumulation, and help reduce bacterial growth, thereby improving the cleanliness of air-conditioning exhaust. Summary of the invention

[0004] The object of the present invention is to provide an energy-saving air-conditioning system that utilizes the waste heat of rotary pre-dehumidification to regenerate, thereby reducing the energy consumption of air-conditioning operation, being able to recycle and reuse the low-temperature regenerated dehumidifier, reducing dust accumulation and helping to reduce bacterial growth, thereby improving the cleanliness of air-conditioning exhaust.

[0005] The present invention provides an energy-saving air conditioning system that utilizes the residual heat of pre-dehumidification of a rotary wheel for regeneration, comprising a dehumidification rotary wheel housing and a regeneration functional area and a fresh air processing functional area connected to the dehumidification rotary wheel housing, wherein the regeneration functional area comprises a regeneration fan, a condenser, a regeneration area, and a regeneration air duct connected in sequence. The fresh air processing functional area comprises a fresh air fan and a return air duct connected in parallel to the dehumidification area, and also comprises a gas-liquid heat exchanger, an evaporator, and an air supply air duct connected in sequence to the dehumidification area, wherein the dehumidification area and the regeneration area are sealed and fixed in the dehumidification rotary wheel housing, and the dehumidification area and the regeneration area are rotatably arranged in the rotary wheel housing, and the dehumidification area and the regeneration area are provided with a large number of through holes that are not connected to each other, and the inner walls of the through holes are coated with a low-temperature regeneration dehumidifier.

[0006] With the above technical solution, the outside air introduced by the regeneration fan is heated by the condenser to a temperature of 45℃~55℃. To ensure that the rotor can be stably regenerated at this temperature, the rotor adopts a low-temperature regeneration dehumidification rotor. The rotor is driven by an electric motor. The low-temperature regeneration dehumidifier gradually adsorbs to a saturated state in the dehumidification zone, rotates to the regeneration zone to start regeneration, gradually dries and restores adsorption capacity, and enters the dehumidification zone to start the next dehumidification process again. The rotor can realize a continuous dehumidification-regeneration cycle, and can achieve stable and continuous dehumidification of the air.

[0007] Optionally, the condenser is used to heat external air.

[0008] By adopting the above technical solution, the condenser can heat the outside air introduced by the regeneration fan and maintain the temperature of the outside air at a suitable temperature.

[0009] Optionally, the evaporator is used to cool the treated air.

[0010] By adopting the above technical solution, the dried air can be maintained at a suitable temperature to improve the user experience. The air is further cooled in the evaporator and reaches the air supply state point required by the indoor environment. During this process, since the air moisture content is low and the air dew point is lower than the surface temperature of the evaporator, no condensation water will be produced.

[0011] Optionally, the air-to-liquid heat exchanger is used to cool the dried air.

[0012] By adopting the above technical solution, the high-temperature dry air enters the gas-liquid heat exchanger and exchanges heat with an easily available natural cold source to achieve initial cooling. The above treatment can reduce the cooling load of the evaporator and reduce energy consumption.

[0013] Optionally, the area of ​​the dehumidification zone is larger than the area of ​​the regeneration zone.

[0014] With the above technical solution, the area ratio of the dehumidification zone to the regeneration zone should be calculated based on the treated air volume, so that the external air can be regenerated stably and continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention provides an overall structural schematic diagram of an energy-saving air-conditioning system that utilizes rotary wheel pre-dehumidification waste heat regeneration.

[0016] Figure 2 A schematic structural diagram of a regeneration functional area of ​​an energy-saving air-conditioning system utilizing rotary wheel pre-dehumidification waste heat for regeneration provided by the present invention.

[0017] Figure 3 A schematic diagram of the structure of the dehumidification zone and the regeneration zone of an energy-saving air-conditioning system utilizing the residual heat of the rotary wheel for pre-dehumidification and regeneration provided by the present invention.

[0018] Explanation of the accompanying drawings: 1. Fresh air fan; 2. Regeneration fan; 3. Return air duct; 4. Supply air duct; 5. Regeneration air duct; 6. Gas-liquid heat exchanger; 7. Evaporator; 8. Condenser; 9. Dehumidification wheel; 10. Dehumidification zone; 11. Regeneration zone. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0020] The embodiment of the present invention provides a dehumidification wheel 9 housing and a regeneration functional area and a fresh air processing functional area connected to the dehumidification wheel 9 housing, wherein the regeneration functional area includes a regeneration fan 2, a condenser 8, a regeneration area, and a regeneration air duct 5 connected in sequence. The fresh air processing functional area includes a fresh air fan 1 and a return air duct 3 connected in parallel with a dehumidification area 10, and also includes a gas-liquid heat exchanger 6, an evaporator 7, and an air supply duct 4 connected in sequence to the dehumidification area 10, the dehumidification area 10 and the regeneration area are sealed and fixed in the dehumidification wheel 9 housing, and the dehumidification area 10 and the regeneration area are rotatably arranged in the wheel housing, the dehumidification area 10 and the regeneration area are provided with a large number of through holes that are not connected to each other, and the inner walls of the through holes are coated with a low-temperature regeneration dehumidifier.

[0021] See also Figure 1 Figure 2The system uses the exhaust heat of the condenser 8 to regenerate the wheel and restore its moisture absorption effect, effectively utilizing the low-temperature waste heat and further improving the energy-saving effect of the system. The outside air introduced by the regeneration fan 2 is heated by the condenser 8 to a temperature of 45°C to 55°C. In order to ensure that the wheel can be stably regenerated at this temperature, the wheel adopts a low-temperature regeneration dehumidification wheel 9, and the water-absorbing material adopts a low-temperature regeneration desiccant such as a ceramic fiber-modified silica gel composite material, which can restore the moisture absorption capacity at 40 to 50°C. The wheel is driven by an electric motor and rotates continuously at a low speed of 1 to 2 r / min. The water-absorbing material gradually adsorbs to a saturated state in the dehumidification zone 10, rotates to the regeneration zone to start regeneration, gradually dries and restores the adsorption capacity, and enters the dehumidification zone 10 to start the next dehumidification process again. The wheel can realize a continuous dehumidification-regeneration cycle and can achieve stable and continuous dehumidification of the air. Specifically, the system can complete the regeneration of the rotor only through condensation heat, without the need for external heat source to supplement heat. The required cooling capacity of the system is reduced by 56% compared with the centralized all-air single-return central air conditioning system of the same specification, and the energy consumption is reduced by more than 48%. The dehumidification technology involved in the system is now very mature, and there are a large number of products that can be used.

[0022] In some embodiments, the condenser 8 is used to heat the outside air.

[0023] In fact, the condenser 8 can heat the outside air introduced by the regeneration fan 2 and maintain the temperature of the outside air at a suitable temperature.

[0024] In some embodiments, the evaporator 7 is used to cool the treated air.

[0025] In fact, the dried air can be maintained at a suitable temperature to improve the user experience. The air is further cooled in the evaporator 7 and reaches the air supply state point required by the indoor environment. During this process, since the air moisture content is low and the air dew point is lower than the surface temperature of the evaporator 7, no condensed water will be produced.

[0026] In some embodiments, the gas-liquid heat exchanger 6 is used to cool the dried air.

[0027] In fact, the high-temperature dry air enters the gas-liquid heat exchanger 6 and exchanges heat with the readily available natural cold source to achieve preliminary cooling. The above treatment can reduce the cooling load of the evaporator 7 and reduce energy consumption.

[0028] In some embodiments, the area of ​​the dehumidification zone 10 is larger than the area of ​​the regeneration zone.

[0029] See also Figure 3 The area ratio of the dehumidification zone 10 to the regeneration zone should be calculated according to the treated air volume, so that the external air can be regenerated stably and continuously. Specifically, the area ratio of the dehumidification zone 10 to the regeneration zone of the rotor is about 3:1.

[0030] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. An energy-saving air conditioning system using rotary pre-dehumidification waste heat regeneration, characterized in that: It includes a dehumidification wheel shell and a regeneration functional area and a fresh air processing functional area connected to the dehumidification wheel shell. The regeneration functional area includes a regeneration fan, a condenser, a regeneration area, and a regeneration air duct connected in sequence. The fresh air processing functional area includes a fresh air fan and a return air duct connected in parallel with the dehumidification area, and also includes a gas-liquid heat exchanger, an evaporator, and an air supply duct connected in sequence to the dehumidification area. The dehumidification area and the regeneration area are sealed and fixed in the dehumidification wheel shell, and the dehumidification area and the regeneration area are rotatably arranged in the wheel shell. The dehumidification area and the regeneration area are provided with a large number of through holes that are not connected to each other, and the inner walls of the through holes are coated with a low-temperature regeneration dehumidifier.

2. The energy-saving air conditioning system using the residual heat regeneration of the rotary pre-dehumidification according to claim 1 is characterized in that: The condenser is used for heating the outside air.

3. The energy-saving air conditioning system using rotary pre-dehumidification waste heat regeneration according to claim 2 is characterized in that: The evaporator is used to cool the treated air.

4. The energy-saving air conditioning system using rotary pre-dehumidification waste heat regeneration according to claim 3 is characterized in that: The gas-liquid heat exchanger is used to cool the dried air.

5. The energy-saving air conditioning system using rotary pre-dehumidification waste heat regeneration according to claim 4 is characterized in that: The area of ​​the dehumidification zone is larger than the area of ​​the regeneration zone.

Images