Energy-saving combined rotary dehumidifier based on heat pump

Abstract

The utility model discloses an energy-saving combined type rotary dehumidifier based on a heat pump, and relates to the field of combined type rotary dehumidifiers. The outlet end of a compressor is connected with a first port of a four-way valve, a second port of the four-way valve is connected with an inlet of a condenser, and a third port of the four-way valve is connected with an outlet of an evaporator. The supercooler completes refrigerant supercooling and air reheating at the same time, the problems that electric heating regeneration energy consumption of traditional equipment is high, and cold and heat are wasted are effectively solved, the energy efficiency ratio of the system is remarkably increased, meanwhile, operating parameters are adjusted in real time through the pressure monitoring assembly, and efficient and stable operation under different seasonal working conditions is ensured.

Description

Technical Field

[0001] This utility model relates to the field of combined rotary dehumidifiers, specifically a heat pump-based energy-saving combined rotary dehumidifier. Background Technology

[0002] The combined rotary dehumidifier is an air conditioning device that achieves efficient dehumidification through rotary adsorption and regeneration technology, and integrates multiple air handling functions such as filtration, cooling, and heating. It is suitable for industrial, commercial, and special places with strict requirements for humidity, cleanliness, and temperature.

[0003] However, current combined rotary dehumidifiers typically achieve humidity control through a rotary adsorption and regeneration cycle. During use, the regeneration process relies on high-energy-consuming electric heating, which significantly increases operating costs, especially in low-temperature and high-humidity environments. After dehumidification, the low-temperature air requires additional electricity to reheat and reduce humidity, resulting in wasted energy for both heating and cooling. The rotary wheel needs to operate continuously to maintain the dehumidification effect, causing frequent regeneration of the adsorption material, shortening its lifespan, and resulting in a high proportion of ineffective energy consumption. The refrigeration system and regeneration module operate independently, making it impossible to dynamically adjust the coordination of cold and heat sources according to seasonal needs. Overall, the energy efficiency is low, severely limiting the applicability of the equipment in energy-saving scenarios. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a heat pump-based energy-saving combined rotary dehumidifier to solve the technical problems of high energy consumption in the regeneration process, energy waste from reheating the dehumidified air, serious material loss due to continuous operation of the rotary dehumidifier, and low overall energy efficiency caused by the inability of the refrigeration system and the regeneration module to coordinate and adjust.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a heat pump-based energy-saving combined rotary dehumidifier, comprising the following systems:

[0006] Heat pump cycle module: The compressor outlet is connected to the first port of a four-way valve, the second port of the four-way valve is connected to the condenser inlet, the third port is connected to the evaporator outlet, and the fourth port is connected to the gas-liquid separator inlet; the condenser outlet is connected to the liquid receiver inlet through a first one-way valve, and the liquid receiver outlet is connected in sequence to a ball valve, a dryer filter, and a thermal expansion valve before being connected to the evaporator inlet.

[0007] Subcooling control module: The outlet end of the liquid receiver branches off to the first electric valve, the outlet of the first electric valve is connected to the refrigerant inlet of the subcooler, the refrigerant outlet of the subcooler is connected to the suction pipe of the compressor through the fifth one-way valve, and the air side of the subcooler uses the heat of refrigerant condensation to reheat the dehumidified air;

[0008] Dehumidified air passage: The outlet end of the air inlet filter is connected to the inlet of the blower, and the outlet end of the blower is sequentially connected to the air side of the evaporator, the dehumidification impeller, and the air side of the subcooler;

[0009] Regeneration duct module: The outlet end of the regeneration air filter is connected to the inlet of the regeneration heater. The regeneration heater uses an electric heating module or a heat pump waste heat recovery device as a heat source. The outlet end of the regeneration heater is connected to the inlet of the regeneration fan. The outlet of the regeneration fan is connected to the regeneration side of the dehumidification rotor. A second solenoid valve is provided at the end of the regeneration duct.

[0010] Pressure monitoring components: The low-pressure gauge is installed in the compressor suction pipe, the high-pressure gauge is installed in the compressor discharge pipe, the dual-pressure controller receives signals from the low-pressure gauge and the high-pressure gauge, and the pressure sensor monitors the internal pressure of the liquid receiver;

[0011] Anti-backflow valve assembly: The second check valve is installed in the pipeline between the evaporator outlet and the liquid receiver, the third check valve is installed in the bypass branch of the condenser outlet, and the fourth check valve is installed in the subcooler outlet branch.

[0012] Auxiliary control valve: The charging valve is installed on the low-pressure side of the compressor.

[0013] By adopting the above technical solution and integrating the heat pump circulation module and the subcooling control module, automatic switching between cooling and heating modes is achieved. The condensation heat is used to reheat the dehumidified air, avoiding additional electric heating energy consumption. At the same time, the linkage control of the regeneration air duct and the pressure monitoring component optimizes the system's energy efficiency and operational stability.

[0014] Furthermore, the outlet of the thermal expansion valve is divided into two paths. The first path is directly connected to the inlet of the evaporator, and the second path is connected to the outlet bypass pipeline of the condenser through a third one-way valve. The two paths merge and then connect to the evaporator.

[0015] By adopting the above technical solutions, the dual-flow design of the thermostatic expansion valve optimizes the refrigerant distribution efficiency, prevents high-pressure backflow in the condenser, and improves system stability and cooling capacity regulation accuracy.

[0016] Furthermore, the regenerative heater is an electric heating tube or a heat pump waste heat recovery device, and its start-stop status is controlled by a dual-pressure controller based on pressure sensor signals.

[0017] By adopting the above technical solutions, the regeneration heater uses heat pump waste heat recovery or electric heating modules, and is started and stopped as needed through a dual-pressure controller, which reduces regeneration energy consumption and extends material life.

[0018] Furthermore, the air side of the subcooler is arranged in countercurrent with the subcooler section of the dehumidified air passage, and the subcooling degree on the refrigerant side is adjusted by the opening degree of the first electric valve.

[0019] By adopting the above technical solution, the air side and refrigerant side of the subcooler are arranged in countercurrent flow, and the subcooling degree is adjusted by the first electric valve, thereby improving the system's energy efficiency and temperature and humidity control accuracy.

[0020] Furthermore, the four-way valve opens the pipeline from the compressor outlet to the condenser inlet in cooling mode, and opens the pipeline from the compressor outlet to the evaporator inlet in heating mode.

[0021] By adopting the above technical solutions, the four-way valve enables automatic switching between cooling and heating modes, adapting to seasonal needs and improving the dehumidification efficiency of the equipment in low-temperature environments.

[0022] Furthermore, the speeds of the blower and the regenerator are synchronously adjusted by the PWM signal output by the dual-pressure controller.

[0023] By adopting the above technical solution, the supply fan and the regenerator fan are synchronously adjusted by a dual-pressure controller, optimizing air volume matching and reducing ineffective operating losses.

[0024] Furthermore, the second solenoid valve is a normally closed solenoid valve, and its opening threshold is set according to the humidity saturation of the dehumidification impeller.

[0025] By adopting the above technical solution, the second solenoid valve controls the discharge according to the humidity saturation threshold of the rotor, preventing excessive regeneration and reducing energy consumption.

[0026] Furthermore, the pressure sensor is connected to the dual-pressure controller to monitor the pressure changes of the liquid reservoir in real time, and adjusts the opening of the first electric valve and the power of the regeneration heater in conjunction with the pressure data, so that the regeneration efficiency of the dehumidification rotor is dynamically matched with the heat pump cycle load.

[0027] By adopting the above technical solution, the pressure sensor and the dual-pressure controller work together to adjust the operating parameters, ensuring a dynamic balance between heat pump load and regeneration efficiency.

[0028] In summary, the present invention has the following main advantages:

[0029] 1. This utility model sets up a heat pump circulation module and a subcooling control module, and uses a four-way valve to realize automatic switching between cooling / heating modes. The subcooler simultaneously completes refrigerant subcooling and air reheating, which effectively solves the problems of high energy consumption and double waste of cold and heat in traditional equipment electric heating regeneration, significantly improving the system energy efficiency ratio. At the same time, the pressure monitoring component adjusts the operating parameters in real time to ensure efficient and stable operation under different seasonal conditions.

[0030] 2. This utility model achieves a dynamic balance between dehumidification efficiency and energy consumption by linking the regeneration air duct module and the dehumidification air channel, using heat pump waste heat recovery to replace traditional electric heating regeneration, and combining dual-pressure controller to synchronously adjust the blower and regeneration blower. This avoids the loss caused by frequent regeneration of adsorption materials, significantly reduces operating costs, and improves the applicability of the equipment in energy-saving scenarios. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a system structure based on a heat pump energy-saving combined rotary dehumidifier.

[0032] In the diagram: 1. Compressor; 2. Four-way valve; 3. Condenser; 4. First check valve; 5. Liquid receiver; 6. Ball valve; 7. Dryer filter; 8. Thermal expansion valve; 9. Second check valve; 10. Third check valve; 11. Fourth check valve; 12. Evaporator; 13. Dehumidifier impeller; 14. Subcooler; 15. Fifth check valve; 16. First electric valve; 17. Gas-liquid separator; 18. Low-pressure gauge; 19. Charging valve; 20. Dual-pressure controller; 21. High-pressure gauge; 22. Pressure sensor; 23. Inlet air filter; 24. Blower; 25. Regenerated air filter; 26. Regenerated heater; 27. Regenerated fan; 28. Second solenoid valve. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] A heat pump-based energy-saving combined rotary dehumidifier, such as Figure 1 As shown, the following systems are included:

[0035] Heat pump cycle module: The outlet end of compressor 1 is connected to the first port of four-way valve 2, the second port of four-way valve 2 is connected to the inlet of condenser 3, the third port is connected to the outlet of evaporator 12, and the fourth port is connected to the inlet of gas-liquid separator 17; the outlet end of condenser 3 is connected to the inlet of liquid receiver 5 through the first one-way valve 4, and the outlet end of liquid receiver 5 is connected in sequence to ball valve 6, dryer filter 7, and thermal expansion valve 8 before being connected to the inlet of evaporator 12;

[0036] Subcooling control module: The outlet end of the liquid receiver 5 branches off to the first electric valve 16. The outlet of the first electric valve 16 is connected to the refrigerant inlet of the subcooler 14. The refrigerant outlet of the subcooler 14 is connected to the suction pipe of the compressor 1 through the fifth one-way valve 15. The air side of the subcooler 14 uses the heat of refrigerant condensation to reheat the dehumidified air.

[0037] Dehumidified air passage: The outlet end of the air inlet filter 23 is connected to the inlet of the blower 24, and the outlet end of the blower 24 is connected in sequence to the air side of the evaporator 12, the dehumidification rotor 13, and the air side of the subcooler 14.

[0038] Regeneration duct module: The outlet end of the regeneration air filter 25 is connected to the inlet of the regeneration heater 26. The regeneration heater 26 uses an electric heating module or a heat pump waste heat recovery device as a heat source. The outlet end of the regeneration heater 26 is connected to the inlet of the regeneration fan 27. The outlet of the regeneration fan 27 is connected to the regeneration side of the dehumidification rotor 13. A second solenoid valve 28 is provided at the end of the regeneration duct.

[0039] Pressure monitoring components: Low pressure gauge 18 is installed in the suction pipe of compressor 1, high pressure gauge 21 is installed in the discharge pipe of compressor 1, dual pressure controller 20 receives signals from low pressure gauge 18 and high pressure gauge 21, and pressure sensor 22 monitors the internal pressure of liquid receiver 5;

[0040] Anti-backflow valve assembly: The second check valve 9 is installed in the pipeline between the outlet of the evaporator 12 and the liquid receiver 5, the third check valve 10 is installed in the bypass branch of the outlet of the condenser 3, and the fourth check valve 11 is installed in the outlet branch of the subcooler 14.

[0041] Auxiliary control valve: The charging valve 19 is installed on the low-pressure side of the compressor 1. It forms a heat pump cycle module through the compressor 1, four-way valve 2, condenser 3, evaporator 12, and gas-liquid separator 17, realizing one-button switching between cooling and heating modes. The subcooler 14, which is diverted at the outlet of the liquid receiver 5, uses the heat of refrigerant condensation to reheat the dehumidified air, replacing traditional electric heating and significantly reducing reheating energy consumption. The regeneration duct module dynamically controls the regeneration efficiency through the linkage of the regeneration heater 26 (electric heating) or heat pump waste heat with the second solenoid valve 28. The pressure monitoring components 18, 20, 21, and 22 regulate the system operating parameters in real time to ensure that the heat pump load matches the regeneration demand, solving the problems of high energy consumption and poor seasonal adaptability of traditional equipment.

[0042] See Figure 1 The outlet of the thermostatic expansion valve 8 is divided into two paths. The first path is directly connected to the inlet of the evaporator 12, and the second path is connected to the outlet bypass line of the condenser 3 through the third one-way valve 10. The two paths merge and then connect to the evaporator 12. The design of the thermostatic expansion valve 8 having two outlet paths, with the first path directly connected to the inlet of the evaporator 12 and the second path connected to the outlet bypass line of the condenser 3 through the third one-way valve 10, and the two paths merging and then connecting to the evaporator 12, effectively balances the refrigerant flow distribution and avoids system fluctuations caused by high-pressure backflow in the condenser 3. The third one-way valve 10 restricts the unidirectional flow of the bypass branch, ensuring that the refrigerant only passes through the bypass in heating mode, improving the reliability of cooling / heating switching, and optimizing the cooling capacity adjustment range.

[0043] See Figure 1The regeneration heater 26 is an electric heating element or a heat pump waste heat recovery device. Its start and stop status is controlled by the dual-pressure controller 20 based on the signal from the pressure sensor 22. The regeneration heater 26 can select an electric heating element or a heat pump waste heat recovery device as its heat source. The dual-pressure controller 20 dynamically controls the start and stop of the regeneration heater 26 based on the pressure signal of the liquid storage tank 5 monitored by the pressure sensor 22, ensuring that the regeneration heat matches the heat pump cycle load. By replacing traditional pure electric heating with waste heat recovery, energy consumption is reduced, and the wear and tear of the adsorption material caused by excessive regeneration of the rotor 13 is avoided, thus extending the service life of the equipment.

[0044] See Figure 1 The air side of the subcooler 14 and the subcooler 14 section of the dehumidified air passage are arranged in a counter-current manner, and the subcooling degree on the refrigerant side is adjusted by the opening of the first electric valve 16. The air side of the subcooler 14 and the subcooler 14 section of the dehumidified air passage are arranged in a counter-current manner, and the subcooling degree on the refrigerant side is adjusted by the opening of the first electric valve 16. Through counter-current heat exchange, the condensation heat is maximized to reheat the dehumidified air and reduce the humidity of the outlet air. At the same time, the precise control of the refrigerant subcooling degree improves the system's energy efficiency ratio (COP) and avoids the loss of cooling capacity caused by insufficient subcooling in traditional equipment, thus achieving integrated temperature and humidity control.

[0045] See Figure 1 In cooling mode, the four-way valve 2 connects the pipeline from the outlet of compressor 1 to the inlet of condenser 3, and in heating mode, it connects the pipeline from the outlet of compressor 1 to the inlet of evaporator 12. Through the path switching function of the four-way valve 2, the pipeline from the outlet of compressor 1 to the inlet of condenser 3 is connected in cooling mode, and the pipeline from the outlet of compressor 1 to the inlet of evaporator 12 is connected in heating mode, realizing the automatic conversion of refrigerant flow direction. In winter heating mode, evaporator 12 absorbs ambient heat to heat the air, replacing the traditional electric heating regeneration, solving the problem of energy consumption surge under low temperature and high humidity conditions, and improving seasonal adaptability.

[0046] See Figure 1 The speeds of the blower 24 and the regenerator 27 are synchronously adjusted by the PWM signal output by the dual-pressure controller 20. The dehumidification air volume and the regeneration air volume are dynamically matched according to the system pressure changes, avoiding the problem of reduced adsorption efficiency of the rotor 13 or insufficient regeneration caused by air volume imbalance in traditional equipment. At the same time, it reduces the energy consumption of the blower ineffective operation and improves the overall energy efficiency.

[0047] See Figure 1The second solenoid valve 28 is a normally closed solenoid valve. Its opening threshold is set according to the humidity saturation of the dehumidifying impeller 13. When the impeller 13 absorbs moisture to the preset threshold, the solenoid valve 28 opens to release humid air, avoiding energy waste or insufficient regeneration caused by fixed cycle regeneration in traditional equipment, and achieving precise matching between regeneration efficiency and dehumidification needs.

[0048] See Figure 1 The pressure sensor 22 is connected to the dual-pressure controller 20 to monitor the pressure changes of the liquid receiver 5 in real time. Based on the pressure data, the controller adjusts the opening of the first electric valve 16 and the power of the regeneration heater 26 to dynamically match the regeneration efficiency of the dehumidification rotor 13 with the heat pump cycle load. The pressure sensor 22 monitors the pressure changes of the liquid receiver 5 in real time, and the dual-pressure controller 20 adjusts the opening of the first electric valve 16 and the power of the regeneration heater 26 based on the pressure data to dynamically match the heat pump cycle load and regeneration efficiency. For example, the regeneration heating power is reduced under low load conditions to avoid ineffective energy consumption caused by rigid control in traditional equipment and achieve optimal energy efficiency of system operation.

[0049] The implementation principle of this embodiment is as follows: First, after the system starts, compressor 1 drives the refrigerant to circulate in the heat pump cycle module, and switches between cooling and heating modes through four-way valve 2:

[0050] Cooling mode: High-temperature refrigerant enters the condenser 3 through the four-way valve 2 to dissipate heat and condense, and then flows into the receiver 5 through the first one-way valve 4. After passing through the dryer filter 7 and the thermal expansion valve 8, it enters the evaporator 12 to absorb heat and dehumidify, and finally returns to the compressor 1 to complete the cycle.

[0051] Heating mode: The four-way valve 2 switches the path, and the refrigerant directly enters the evaporator 12 to absorb heat, and then releases heat through the condenser 3 to raise the temperature and achieve air heating;

[0052] Meanwhile, the refrigerant at the outlet of the liquid receiver 5 is diverted to the subcooling control module. The first electric valve 16 regulates the flow rate to enter the subcooler 14 for further cooling. The subcooling on the refrigerant side improves the system's energy efficiency, and the air side uses the heat of condensation to reheat the dehumidified air, reducing the humidity of the outlet air.

[0053] In the dehumidified air passage, the outside air is purified by the air inlet filter 23, and then delivered to the evaporator 12 for pre-cooling and dehumidification by the blower 24. It is then deeply adsorbed by the dehumidification wheel 13, and finally discharged after being reheated by the subcooler 14.

[0054] In the regeneration air duct module, the regeneration air is filtered by the regeneration air filter 25 and then heated by the regeneration heater 26 by electric heating or waste heat from the heat pump. The regeneration fan 27 drives the hot air into the regeneration side of the dehumidification wheel 13 to desorb moisture. The second solenoid valve 28 controls the discharge of humid air according to the humidity saturation of the wheel.

[0055] The pressure monitoring component collects system pressure in real time through low pressure gauge 18, high pressure gauge 21, and pressure sensor 22. The dual pressure controller 20 adjusts the opening of the first electric valve 16 and the power of the regeneration heater 26 in conjunction with the data to ensure dynamic matching between heat pump load and regeneration efficiency. The anti-backflow valve group 9, 10, 11 and auxiliary control valve 19 ensure unidirectional flow of refrigerant and system maintenance safety.

[0056] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A heat pump-based energy-saving combined rotary dehumidifier, characterized in that, Including the following systems: Heat pump cycle module: The outlet end of the compressor (1) is connected to the first port of the four-way valve (2), the second port of the four-way valve (2) is connected to the inlet of the condenser (3), the third port is connected to the outlet of the evaporator (12), and the fourth port is connected to the inlet of the gas-liquid separator (17); the outlet end of the condenser (3) is connected to the inlet of the liquid receiver (5) through the first one-way valve (4), and the outlet end of the liquid receiver (5) is connected in sequence to the ball valve (6), the dryer filter (7), the thermal expansion valve (8) and then connected to the inlet of the evaporator (12); Subcooling control module: The outlet end of the liquid receiver (5) branches out to the first electric valve (16), the outlet of the first electric valve (16) is connected to the refrigerant inlet of the subcooler (14), the refrigerant outlet of the subcooler (14) is connected to the suction pipe of the compressor (1) through the fifth one-way valve (15), and the air side of the subcooler (14) uses the heat of refrigerant condensation to reheat the dehumidified air; Dehumidified air passage: The outlet end of the air inlet filter (23) is connected to the inlet of the blower (24), and the outlet end of the blower (24) is connected in sequence to the air side of the evaporator (12), the dehumidifying impeller (13), and the air side of the subcooler (14); Regeneration air duct module: The outlet end of the regeneration air filter (25) is connected to the inlet of the regeneration heater (26). The regeneration heater (26) uses an electric heating module or a heat pump waste heat recovery device as a heat source. The outlet end of the regeneration heater (26) is connected to the inlet of the regeneration fan (27). The outlet of the regeneration fan (27) is connected to the regeneration side of the dehumidification rotor (13). A second solenoid valve (28) is provided at the end of the regeneration air duct. Pressure monitoring components: a low pressure gauge (18) is installed in the suction pipe of the compressor (1), a high pressure gauge (21) is installed in the discharge pipe of the compressor (1), a dual pressure controller (20) receives signals from the low pressure gauge (18) and the high pressure gauge (21), and a pressure sensor (22) monitors the internal pressure of the liquid receiver (5); Anti-backflow valve group: The second check valve (9) is installed in the pipeline between the outlet of the evaporator (12) and the liquid receiver (5), the third check valve (10) is installed in the bypass branch of the outlet of the condenser (3), and the fourth check valve (11) is installed in the outlet branch of the subcooler (14). Auxiliary control valve: The charging valve (19) is installed on the low-pressure side of the compressor (1).

2. The heat pump-based energy-saving combined rotary dehumidifier according to claim 1, characterized in that: The outlet of the thermal expansion valve (8) is divided into two paths. The first path is directly connected to the inlet of the evaporator (12), and the second path is connected to the outlet bypass pipeline of the condenser (3) through the third check valve (10). The two paths are then connected to the evaporator (12).

3. The combined rotary dehumidifier based on a heat pump energy saving method according to claim 1, characterized in that: The regenerative heater (26) is an electric heating tube or a heat pump waste heat recovery device, and its start-stop status is controlled by the dual-pressure controller (20) according to the signal of the pressure sensor (22).

4. The combined rotary dehumidifier based on a heat pump energy saving method according to claim 1, characterized in that: The air side of the subcooler (14) is arranged in countercurrent with the subcooler (14) section of the dehumidified air passage, and the subcooling degree of its refrigerant side is adjusted by the opening degree of the first electric valve (16).

5. The combined rotary dehumidifier based on a heat pump energy saving method according to claim 1, characterized in that: The four-way valve (2) connects the pipeline from the outlet of the compressor (1) to the inlet of the condenser (3) in the refrigeration mode, and connects the pipeline from the outlet of the compressor (1) to the inlet of the evaporator (12) in the heating mode.

6. The combined rotary dehumidifier based on a heat pump energy saving method according to claim 1, characterized in that: The speeds of the blower (24) and the regenerator (27) are synchronously adjusted by the PWM signal output by the dual-pressure controller (20).

7. The combined rotary dehumidifier based on a heat pump energy saving method according to claim 1, characterized in that: The second solenoid valve (28) is a normally closed solenoid valve, and its opening threshold is set according to the humidity saturation of the dehumidification impeller (13).

8. The combined rotary dehumidifier based on a heat pump energy saving method according to claim 1, characterized in that: The pressure sensor (22) is connected to the dual-pressure controller (20) to monitor the pressure change of the liquid reservoir (5) in real time, and adjusts the opening of the first electric valve (16) and the power of the regeneration heater (26) according to the pressure data, so that the regeneration efficiency of the dehumidification rotor (13) is dynamically matched with the heat pump cycle load.

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