Rotary dehumidifier unit with condensing heat recovery

Abstract

The utility model discloses a kind of condensing heat recovery rotary dehumidifier unit, it is related to air conditioning unit technical field, including unit box, in one end of the unit box is provided with primary filter, along the length direction of the unit box, in the unit box is sequentially provided with front surface cooler, secondary filter, middle surface cooler, rotary dehumidifier body, primary evaporator, air supply component, reheater, rear surface cooler, the upper layer of the unit box is also provided with primary condenser, with the primary condenser, the primary evaporator is connected with primary refrigeration cycle system, in the primary condenser side is provided with secondary condenser, secondary evaporator, with the secondary condenser, the secondary evaporator is connected with secondary refrigeration cycle system, condensing heat discharged in primary condenser, secondary condenser condensing process, to heat regenerative fresh air, to reduce electric heating amount, reach the purpose of energy saving.

Description

Technical Field

[0001] This utility model belongs to the technical field of air conditioning units, specifically a dehumidifier unit with condensation heat recovery rotary wheel. Background Technology

[0002] With the increasing contradiction between economic development and energy supply, energy issues are becoming a bottleneck restricting China's completion of industrialization, urbanization, and rapid economic development. Energy conservation and emission reduction have become fundamental national policies for achieving national economic security and sustainable development. Along with rapid economic development, the energy consumption of air conditioning systems accounts for an increasingly larger proportion of my country's total energy consumption. Energy conservation and environmental protection are two major issues that humanity urgently needs to address. From August 26 to September 4, 2002, the World Summit on Sustainable Development was held in Johannesburg, South Africa. At this conference, the International Institute of Refrigeration (IIR) issued the "Commitment of the Refrigeration Industry to Sustainable Development and Mitigating Atmospheric Change." This document clarified that the main challenge facing the refrigeration industry comes from global warming, and that 80% of the impact of the refrigeration industry on global warming is due to carbon dioxide emissions. These indirect emissions are partly caused by the production of energy required for the operation of refrigeration equipment.

[0003] Conventional rotary dehumidifier air conditioning units use chilled water coils to pre-cool and dehumidify fresh air before it enters the rotary dehumidifier for deep dehumidification. Then, recooling and reheating coils regulate the temperature and humidity of the treated air to achieve the required constant temperature and humidity. The rotary dehumidifier also needs to heat the regenerated fresh air, typically using electric heating, which requires a large amount of energy. Furthermore, the high-temperature exhaust air from the rotary dehumidifier needs to be cooled before being discharged outdoors, necessitating a separate cooling system. Adding a refrigeration system to the rotary dehumidifier air conditioning unit, using evaporator coils for cooling and utilizing the heat released from the condenser to heat the regenerated fresh air, effectively reduces the power consumption of electric heating. This improves energy efficiency, reduces energy consumption and environmental pollution, and saves energy costs. Therefore, we propose a rotary dehumidifier unit with condensate heat recovery. Utility Model Content

[0004] This utility model provides a rotary dehumidifier unit with condensation heat recovery, which solves the technical problems of high exhaust air temperature, lack of energy saving, and low energy utilization rate of current rotary dehumidifier units with condensation heat recovery.

[0005] To solve the above-mentioned technical problems, this utility model provides a rotary dehumidifier unit with condensing heat recovery, including a unit housing. A primary filter is provided at one end of the unit housing. Along the length of the unit housing, a front surface cooler, a secondary filter, a middle surface cooler, a rotary dehumidifier body, a primary evaporator, an air supply assembly, a reheater, and a rear surface cooler are sequentially arranged inside the unit housing. A primary condenser is also provided on the upper layer of the unit housing. A primary refrigeration cycle system is connected to the primary condenser and the primary evaporator. A secondary condenser and a secondary evaporator are provided on one side of the primary condenser. A secondary refrigeration cycle system is connected to the secondary condenser and the secondary evaporator.

[0006] Preferably, the primary refrigeration cycle system includes a primary compressor, a primary condenser, a primary dryer filter, a primary throttling element, a primary evaporator, a primary gas-liquid separator, and a primary pipeline, wherein the primary compressor, the primary condenser, the primary dryer filter, the primary throttling element, the primary evaporator, and the primary gas-liquid separator are connected sequentially through the primary pipeline.

[0007] Preferably, the two-stage refrigeration cycle system includes a two-stage compressor, a two-stage condenser, a two-stage dryer filter, a two-stage throttling element, a two-stage evaporator, a two-stage gas-liquid separator, and two-stage piping, wherein the two-stage compressor, the two-stage condenser, the two-stage dryer filter, the two-stage throttling element, the two-stage evaporator, and the two-stage gas-liquid separator are connected sequentially through the two-stage piping.

[0008] Preferably, the pore diameter of the primary filter is larger than that of the secondary filter. The primary filter is a coarse filter that performs coarse purification of the fresh air, while the secondary filter is a medium-efficiency filter that performs secondary purification of the air.

[0009] Preferably, the front surface cooler, the middle surface cooler, and the rear surface cooler all use chilled water coils. The front surface cooler uses water as a medium, and the supplied chilled water enters the front surface cooler to exchange heat with the fresh air, achieving preliminary cooling and dehumidification. The middle surface cooler is a chilled water coil, using water as a medium, and the supplied chilled water enters the middle surface cooler to achieve further cooling and dehumidification. The rear surface cooler is a chilled water coil, using water as a medium, and the supplied chilled water enters the rear surface cooler to achieve further cooling and dehumidification.

[0010] Preferably, the primary evaporator is an air-cooled finned coil structure, using refrigerant as the medium. It exchanges heat with the air coming out of the rotary dehumidifier through the low-temperature refrigerant after throttling in the refrigeration system, thereby achieving further cooling.

[0011] Preferably, the primary condenser is located at the fresh air reheat inlet of the rotary dehumidifier body, and the heat generated by condensation exchanges with the fresh air to raise its temperature.

[0012] Preferably, the secondary condenser is placed between the primary condenser and the rotary dehumidifier body, so that the temperature of the fresh air regenerated by the rotary dehumidifier is raised again.

[0013] Preferably, the secondary evaporator is located at the air outlet of the rotary dehumidifier body, and the air is cooled by the secondary evaporator before being discharged outside the unit.

[0014] Preferably, the reheater is either a hot water heater or a steam heater.

[0015] Preferably, the air supply component is located on the side of the primary evaporator away from the main body of the rotary dehumidifier, and the air supply component is a volute-less fan that can adjust the air volume of the unit.

[0016] Compared with related technologies, this utility model has the following beneficial effects: 1. In this invention, the fresh air first passes through a primary filter for purification, then through a pre-cooler, where chilled water supplied by the pre-cooler provides initial cooling and dehumidification. The treated low-temperature, low-humidity air mixes with the return air and passes through a secondary cooler for further cooling and dehumidification. It then enters the rotary dehumidifier, primary evaporator, reheater, and post-cooler for sequential processing until it reaches the desired state, achieving constant temperature and humidity. The condensation heat emitted during the condensation process of the primary and secondary condensers at the fresh air reheat inlet of the upper rotary dehumidifier is used to heat the regenerated fresh air, thereby reducing the amount of electric heating required. The high-temperature exhaust air from the rotary dehumidifier is cooled by the secondary evaporator before being discharged outside the unit, effectively reducing the exhaust air temperature and minimizing thermal pollution to the environment. This invention effectively utilizes the condensation heat of the refrigeration system to achieve energy savings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of a rotary dehumidifier unit with condensation heat recovery. Figure 2 A schematic diagram illustrating the structural principle of a primary refrigeration cycle system in a rotary dehumidifier unit with condensation heat recovery; Figure 3 This is a schematic diagram of the structural principle of a two-stage refrigeration cycle system in a rotary dehumidifier unit with condensation heat recovery.

[0018] The diagram is labeled as follows: 1. Primary filter; 2. Front surface cooler; 3. Secondary filter; 4. Middle surface cooler; 5. Rotary dehumidifier body; 6. Primary evaporator; 7. Air supply assembly; 8. Reheater; 9. Rear surface cooler; 10. Primary condenser; 11. Secondary condenser; 12. Secondary evaporator; 13. Unit housing; 14. Primary refrigeration cycle system; 141. Primary compressor; 142. Primary dryer filter; 143. Primary throttling element; 144. Primary gas-liquid separator; 145. Primary piping; 15. Secondary refrigeration cycle system; 151. Secondary compressor; 152. Secondary dryer filter; 153. Secondary throttling element; 154. Secondary gas-liquid separator; 155. Secondary piping. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Example 1 like Figures 1-3 As shown, a rotary dehumidifier unit with condensing heat recovery includes a unit housing 13. A primary filter 1 is provided at one end of the unit housing 13. Along the length of the unit housing 13, a front surface cooler 2, a secondary filter 3, a middle surface cooler 4, a rotary dehumidifier body 5, a primary evaporator 6, an air supply assembly 7, a reheater 8, and a rear surface cooler 9 are arranged sequentially inside the unit housing 13. A primary condenser 10 is also provided on the upper layer of the unit housing 13. A primary refrigeration cycle system 14 is connected to the primary condenser 10 and the primary evaporator 6. A secondary condenser 11 and a secondary evaporator 12 are provided on one side of the primary condenser 10. A secondary refrigeration cycle system 15 is connected to the secondary condenser 11 and the secondary evaporator 12. The unit consists of a primary filter 1, a pre-cooler 2, a secondary filter 3, a middle cooler 4, a rotary dehumidifier, a primary evaporator 6, an air supply assembly 7, a reheater 8, a rear cooler 9, a primary condenser 10, a secondary condenser 11, a secondary evaporator 12, and a unit housing 13. Fresh air is first purified by the primary filter 1, then passes through the pre-cooler 2, where it undergoes initial cooling and dehumidification using chilled water supplied by the pre-cooler 2. The treated low-temperature, low-humidity air mixes with return air and passes through the middle cooler 4 for secondary cooling and dehumidification. It then enters the rotary dehumidifier, primary evaporator 6, reheater 8, and rear cooler 9 for sequential processing until it reaches the required constant temperature and humidity. At the upper rotary dehumidifier's fresh air reheat inlet, the fresh air is heated by the primary condenser 10 and secondary condenser 11 before entering the rotary dehumidifier's regeneration heater. The high-temperature exhaust air from the rotary dehumidifier is cooled by the secondary evaporator 12 before being discharged outside the unit.

[0021] Example 2 like Figure 2 As shown, the primary refrigeration cycle system 14 includes a primary compressor 141, a primary condenser 10, a primary dryer filter 142, a primary throttling element 143, a primary evaporator 6, a primary gas-liquid separator 144, and a primary pipeline 145. The refrigerant circulates between the primary compressor 141, the primary condenser 10, the primary dryer filter 142, the primary throttling element 143, the primary evaporator 6, and the primary gas-liquid separator 144 through the driving action of the primary compressor 141. The primary compressor 141, the primary condenser 10, and the primary gas-liquid separator 144 are located on the rotary regeneration heating air inlet side of the rotary dehumidifier body 5. The low-temperature, low-pressure refrigerant liquid absorbs heat from the high-temperature air through the evaporator and evaporates into low-temperature, low-pressure refrigerant vapor, thereby reducing the air temperature and humidity. The high-temperature, high-pressure refrigerant gas is condensed and cooled by the condenser and dissipates heat to the outside, causing the fresh air on the regeneration side of the rotary dehumidifier to heat up. like Figure 3As shown, the two-stage refrigeration cycle system 15 includes a two-stage compressor 151, a two-stage condenser 11, a two-stage dryer filter 152, a two-stage throttling element 153, a two-stage evaporator 12, a two-stage gas-liquid separator 154, and a two-stage pipeline 155, forming another closed system. The two-stage compressor 151, the two-stage condenser 11, and the two-stage gas-liquid separator 154 are located on the rotor regeneration heating air inlet side of the rotary dehumidifier body 5, and are close to the first-stage condenser 10. The two-stage dryer filter 152, the two-stage throttling element 153, and the two-stage evaporator 12 are located on the rotor regeneration heating air inlet side of the rotary dehumidifier body 5. On the heated air outlet side, the refrigerant circulates between the secondary compressor 151, secondary condenser 11, secondary dryer filter 152, secondary throttling element 153, secondary evaporator 12, and secondary gas-liquid separator 154 through the driving action of the secondary compressor 151. This allows the low-temperature, low-pressure refrigerant liquid to absorb heat from the higher-temperature air through the evaporator and evaporate into low-temperature, low-pressure refrigerant vapor, thereby reducing the air temperature and humidity. The high-temperature, high-pressure refrigerant gas is condensed and cooled by the condenser and then dissipates heat to the outside, causing the fresh air on the regeneration air side of the rotary dehumidifier body 5 to be heated again after passing through the primary condenser 10. like Figure 1 As shown, a primary filter 1 is installed at the air inlet of the unit housing 13. The filter hole diameter of the primary filter 1 is larger than that of the secondary filter 3. That is, the primary filter 1 is a coarse filter to perform coarse purification of the fresh air. like Figure 1 As shown, a secondary filter 3 is installed between the front surface cooler 2 and the middle surface cooler 4. The filter hole diameter of the primary filter 1 is larger than that of the secondary filter 3, that is, the secondary filter 3 is a medium-efficiency filter, which performs secondary purification of the air. like Figure 1 As shown, the front surface cooler 2 is a chilled water coil. Water is used as the medium. The supplied chilled water enters the front surface cooler 2 to exchange heat with the fresh air, thereby achieving preliminary cooling and dehumidification. like Figure 1 As shown, the intermediate surface cooler 4 is a chilled water coil. Water is used as the medium. The supplied chilled water enters the intermediate surface cooler 4 to achieve further cooling and dehumidification. like Figure 1 As shown, the first-stage evaporator 6 is an air-cooled finned coil that uses refrigerant as the medium. It exchanges heat with the air coming out of the rotary dehumidifier through the low-temperature refrigerant after throttling in the refrigeration system, thereby achieving further cooling. like Figure 1 As shown, reheater 8 is for hot water heating or steam heating and is used to regulate the air temperature; like Figure 1 As shown, the rear surface cooler 9 is a chilled water coil. Water is used as the medium. The supplied chilled water enters the rear surface cooler 9 to achieve the final temperature regulation and make it reach the required temperature and humidity. like Figure 1 As shown, the first-stage condenser 10 is placed at the fresh air reheat inlet of the rotary dehumidifier body 5. The condensation heat generated is exchanged with the fresh air to raise its temperature and recover the condensation heat. like Figure 1 As shown, the secondary condenser 11 is placed between the primary condenser 10 and the rotary dehumidifier body 5, and is close to the primary condenser 10. The high-temperature air that comes out after being heated by the primary condenser 10 enters the secondary condenser 11, which raises the temperature of the regenerated fresh air again, recovering as much heat as possible to reduce the amount of electric heating. like Figure 1 As shown, the air supply assembly 7 is located on the side of the primary evaporator 6 away from the rotary dehumidifier body 5. The air supply assembly 7 is a volute-less fan, which can adjust the air volume of the unit. like Figure 1 As shown, the secondary evaporator 12 is located at the air outlet of the rotary dehumidifier body 5. The regenerated fresh air is cooled by passing through the secondary evaporator 12 before being discharged outside the unit.

[0022] Working principle: such as Figures 1-3 As shown, fresh air undergoes coarse purification through the primary filter 1 at the air inlet of the unit housing 13, and then enters the front surface cooler 2. The fresh air exchanges heat with the chilled water in the front surface cooler 2 to achieve initial cooling and dehumidification. The treated low-temperature and low-humidity air mixes with the return air, then undergoes secondary purification through the secondary filter 3, and then enters the middle surface cooler 4 to exchange heat with the chilled water in the middle surface cooler 4 to achieve further cooling and dehumidification. The air then enters the rotary dehumidifier body 5 for deep dehumidification to achieve a low humidity state. After passing through the primary evaporator 6 for cooling, the reheater 8 for heating and temperature adjustment, and the rear surface cooler 9 for temperature and humidity adjustment, the treated air that meets the requirements is delivered to the room through the air supply assembly 7. The first-stage refrigeration cycle system 14: The first-stage compressor 141 draws in low-temperature, low-pressure superheated saturated vapor from the first-stage evaporator 6. After compressing the low-temperature, low-pressure superheated saturated vapor, it becomes high-temperature, high-pressure superheated vapor. The high-temperature, high-pressure superheated refrigerant vapor enters the condenser coil in the first-stage condenser 10 and exchanges heat with the outdoor air. After absorbing heat, the air temperature rises sharply and enters the second-stage condenser 11. The condensed liquid refrigerant flows out of the first-stage condenser 10 and enters the first-stage dryer filter 142. After being throttled by the first-stage throttling element 143, it becomes a low-temperature, low-pressure gas-liquid two-phase refrigerant and then enters the first-stage evaporator 6. It exchanges heat with the passing air, absorbs the heat of the air, and evaporates into low-temperature, low-pressure refrigerant vapor, thereby lowering the air temperature. The low-temperature, low-pressure refrigerant vapor then enters the first-stage compressor 141. Secondary refrigeration cycle system 15: The secondary compressor 151 draws in low-temperature, low-pressure superheated saturated steam from the secondary evaporator 12, compresses it to produce high-temperature, high-pressure superheated steam, and the high-temperature, high-pressure superheated refrigerant vapor enters the condenser coil in the secondary condenser 11 to exchange heat with air from the primary condenser 10. The air absorbs heat and its temperature rises, then it enters the regeneration fresh air end of the rotary dehumidifier body 5 for heating the regeneration fresh air of the rotary dehumidifier body 5. The condensed liquid... The refrigerant flows out from the secondary condenser 11 and enters the secondary dryer filter 152. After being throttled by the secondary throttling element 153, it becomes a low-temperature, low-pressure gas-liquid two-phase refrigerant, which then enters the secondary evaporator 12. It exchanges heat with the exhaust air on the regeneration fresh air outlet side of the rotary dehumidifier body 5, absorbs the heat of the air, and evaporates into low-temperature, low-pressure refrigerant vapor, thereby reducing the temperature of the exhaust air. The low-temperature, low-pressure refrigerant vapor then enters the secondary compressor 151. This cycle repeats continuously, allowing the rotary dehumidifier unit with condensation heat recovery to work continuously.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary dehumidifier unit with condensing heat recovery, comprising a unit housing (13), wherein a primary filter (1) is provided at one end of the unit housing (13), and along the length of the unit housing (13), a front surface cooler (2), a secondary filter (3), a middle surface cooler (4), a rotary dehumidifier body (5), a primary evaporator (6), an air supply assembly (7), a reheater (8), and a rear surface cooler (9) are sequentially arranged inside the unit housing (13), characterized in that, The upper part of the unit housing (13) is also provided with a primary condenser (10), and a primary refrigeration cycle system (14) is connected to the primary condenser (10) and the primary evaporator (6). A secondary condenser (11) and a secondary evaporator (12) are provided on one side of the primary condenser (10), and a secondary refrigeration cycle system (15) is connected to the secondary condenser (11) and the secondary evaporator (12).

2. The dehumidifier unit with condensation heat recovery rotary wheel according to claim 1, characterized in that, The primary refrigeration cycle system (14) includes a primary compressor (141), a primary condenser (10), a primary dryer filter (142), a primary throttling element (143), a primary evaporator (6), a primary gas-liquid separator (144), and a primary pipeline (145). The primary compressor (141), the primary condenser (10), the primary dryer filter (142), the primary throttling element (143), the primary evaporator (6), and the primary gas-liquid separator (144) are connected sequentially through the primary pipeline (145).

3. The dehumidifier unit with condensation heat recovery rotary wheel according to claim 1, characterized in that, The secondary refrigeration cycle system (15) includes a secondary compressor (151), a secondary condenser (11), a secondary dryer filter (152), a secondary throttling element (153), a secondary evaporator (12), a secondary gas-liquid separator (154), and a diode circuit (155). The secondary compressor (151), the secondary condenser (11), the secondary dryer filter (152), the secondary throttling element (153), the secondary evaporator (12), and the secondary gas-liquid separator (154) are connected in sequence through the diode circuit (155).

4. A rotary dehumidifier unit with condensation heat recovery according to claim 1, characterized in that, The diameter of the filter pores in the primary filter (1) is larger than that in the secondary filter (3).

5. A dehumidifier unit with condensation heat recovery rotary wheel according to claim 1, characterized in that, The front surface cooler (2), the middle surface cooler (4), and the rear surface cooler (9) all use chilled water coils.

6. A dehumidifier unit with condensation heat recovery rotary wheel according to claim 1, characterized in that, The primary evaporator (6) is an air-cooled finned coil structure.

7. A rotary dehumidifier unit with condensation heat recovery according to claim 1, characterized in that, The primary condenser (10) is located at the fresh air reheat inlet of the rotary dehumidifier body (5).

8. A rotary dehumidifier unit with condensation heat recovery according to claim 1, characterized in that, The secondary condenser (11) is placed between the primary condenser (10) and the rotary dehumidifier body (5), and is close to the primary condenser (10).

9. A rotary dehumidifier unit with condensation heat recovery according to claim 1, characterized in that, The secondary evaporator (12) is located at the regeneration heating air outlet of the rotary dehumidifier body (5).

10. A dehumidifier unit with condensation heat recovery rotary wheel according to claim 1, characterized in that, The air supply assembly (7) is located on the side of the primary evaporator (6) away from the rotary dehumidifier body (5), and the air supply assembly (7) is a volute-less fan.

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