Heat pump dryer with constant temperature dehumidification function

Abstract

This utility model discloses a heat pump dryer with constant temperature and dehumidification function, belonging to the field of heat pump dryers. It includes a dryer body, with a return air vent located on the upper left side of the dryer body. Symmetrical partitions are installed inside the dryer body, and a cross-flow heat exchanger is fixedly installed between the two sets of partitions. An evaporator is fixedly installed inside the lower right side of the dryer body, and an air duct is located inside the dryer body to the right of the evaporator. A first heat dissipation condenser is fixedly installed inside the lower left side of the dryer body. Through the set constant temperature and dehumidification components, precise control of the internal temperature and humidity of the dryer body is achieved, effectively avoiding the temperature fluctuations and incomplete humidity removal problems that occur in traditional heat pump dryers during the drying process. This greatly improves the drying efficiency and effect. Furthermore, this device employs two heat recovery processes, making the system more energy-efficient. It utilizes pre-cooling and pre-dehumidification, as well as deep dehumidification via the evaporator.

Description

Technical Field

[0001] This utility model relates to the field of heat pump dryer technology, specifically a heat pump dryer with constant temperature and dehumidification function. Background Technology

[0002] With the continuous advancement and innovation of technology, heat pump dryers have been widely applied and popularized in various industries and fields. However, in actual use, traditional heat pump dryers often face some challenges and problems in drying operations. For example, the inaccuracy of temperature control often leads to large temperature fluctuations during the drying process, which not only affects the drying efficiency and effect but may also cause varying degrees of damage to the dried items. In addition, the problem of incomplete moisture removal often troubles users, because excessive humidity or residual moisture will cause the dried items to remain damp, and may even breed bacteria and mold, affecting the quality and service life of the items. This not only reduces the effectiveness of the dryer but may also have a negative impact on the user's production efficiency and economic benefits.

[0003] Therefore, this utility model provides a heat pump dryer with constant temperature and dehumidification function to solve the above problems. Summary of the Invention

[0004] This invention provides a heat pump dryer with constant temperature and dehumidification function, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a dryer body, with a return air vent on the upper left side of the dryer body. Symmetrical partitions are installed inside the dryer body, and a cross-flow heat exchanger is fixedly installed between the two sets of partitions. An evaporator is fixedly installed inside the lower right side of the dryer body. An air duct is provided inside the dryer body to the right of the evaporator. A first heat dissipation condenser is fixedly installed inside the lower left side of the dryer body. A first fan is fixedly installed inside the lower left side of the dryer body. An air outlet is opened at the left end of the dryer body and is fixedly connected to the first fan. A constant temperature dehumidification component is provided inside the front end of the dryer body.

[0006] As a preferred technical solution of this application, the lower end of the dryer body is provided with four sets of support legs, and the lower surface of the four sets of support legs is bonded with rubber pads.

[0007] As a preferred technical solution of this application, the constant temperature dehumidification component includes a compressor, which is fixedly installed inside the front end of the dryer body. A first connecting pipe is fixedly installed at the upper end of the compressor, a first solenoid valve is fixedly installed at the upper right end of the first connecting pipe, and a second solenoid valve is fixedly installed at the lower right end of the first connecting pipe. A second heat dissipation condenser is fixedly installed inside the front end of the dryer body. The first connecting pipe is fixedly connected to the first heat dissipation condenser and the second heat dissipation condenser respectively. A fourth connecting pipe is provided at the lower end of the compressor, and the right end of the fourth connecting pipe is fixedly connected to the evaporator.

[0008] As a preferred technical solution of this application, a liquid storage tank is fixedly installed inside the front end of the dryer body. The liquid storage tank is fixedly connected to the first heat dissipation condenser and the second heat dissipation condenser. A third connecting pipe is provided at the lower end of the liquid storage tank. The third connecting pipe is fixedly connected to the evaporator. A filter is fixedly installed between the third connecting pipe and the evaporator.

[0009] As a preferred technical solution of this application, a second connecting pipe is fixedly installed on the left side of the second heat dissipation condenser, and the second connecting pipe is connected to an external circulating pump and a cooling tower.

[0010] As a preferred technical solution of this application, a second fan is fixedly installed inside the front end of the dryer body, and the second fan is fixedly connected to the fourth connecting pipe and the evaporator respectively.

[0011] As a preferred technical solution of this application, a filter plate is fixedly installed inside the upper end of the dryer body, and the filter plate is located between the return air inlet and the upper left opening of the cross-flow heat exchanger.

[0012] Beneficial effects

[0013] By incorporating a constant temperature and humidity control component, precise control of the internal temperature and humidity of the dryer is achieved, effectively avoiding the temperature fluctuations and incomplete humidity removal problems that occur in traditional heat pump dryers during the drying process. This greatly improves the drying efficiency and effect. Furthermore, this device employs two heat recovery processes, making the system more energy-efficient. The cooling and condensation dehumidification process utilizes pre-cooling and pre-dehumidification as well as deep dehumidification via an evaporator, ensuring that warm and humid air is thoroughly cooled and dehumidified. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of a heat pump dryer with constant temperature and dehumidification function;

[0015] Figure 2 This is a front view structural cross-sectional diagram of a heat pump dryer with constant temperature and dehumidification function;

[0016] Figure 3This is a rear view cross-sectional diagram of a heat pump dryer with constant temperature and dehumidification function.

[0017] Figure 4 for Figure 3 A magnified structural diagram at point A.

[0018] In the picture:

[0019] 1. Dryer body; 2. Support legs; 3. Return air inlet; 4. Filter plate; 5. Baffle plate; 6. Cross-flow heat exchanger; 7. Evaporator; 8. Air duct; 9. First heat dissipation condenser; 10. First fan; 11. Air outlet; 12. Compressor; 13. First connecting pipe; 14. First solenoid valve; 15. Second solenoid valve; 16. Second heat dissipation condenser; 17. Second connecting pipe; 18. Liquid receiver; 19. Third connecting pipe; 20. Filter; 21. Fourth connecting pipe; 22. Second fan. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides a heat pump dryer with constant temperature and dehumidification function, such as... Figure 1-4 As shown, the heat pump dryer with constant temperature and dehumidification function includes a dryer body 1. A return air vent 3 is provided on the upper left side of the dryer body 1. Baffles 5 are symmetrically installed inside the dryer body 1. A cross-flow heat exchanger 6 is fixedly installed between the two sets of baffles 5. An evaporator 7 is fixedly installed inside the lower right side of the dryer body 1. An air duct 8 is provided inside the dryer body 1 to the right of the evaporator 7. A first heat dissipation condenser 9 is fixedly installed inside the lower left side of the dryer body 1. A first fan 10 is fixedly installed inside the lower left side of the dryer body 1. An air outlet 11 is opened at the left end of the dryer body 1. The air outlet 11 is fixedly connected to the first fan 10. A constant temperature and dehumidification component is provided inside the front end of the dryer body 1.

[0022] Through the coordinated use of the above devices, when the dryer body 1 is running, the humid air to be dried is first sent into the dryer body 1 through the return air vent 3. When the humid air passes through the cross-flow heat exchanger 6, it undergoes the first pre-cooling and dehumidification. Then, the humid air enters the evaporator 7, where it undergoes deep dehumidification, reducing the humidity of the humid air. The dehumidified air then passes through the air duct 8 and the cross-flow heat exchanger 6 into the first heat dissipation condenser 9, where it exchanges heat with the incoming warm and humid air in the cross-flow heat exchanger 6, pre-cooling and dehumidifying the incoming warm and humid air. The first heat dissipation condenser 9 heats the dehumidified air, increasing its temperature. The heated air is then discharged from the dryer body 1 through the first fan 10 and the air outlet 11. Depending on whether heat is recovered at the set temperature, dry air at a suitable temperature is sent to the soft capsule drum or the drying room. This achieves precise control of the internal temperature and humidity of the dryer body 1, and the air undergoes secondary dehumidification treatment through the constant temperature dehumidification component.

[0023] The lower end of the dryer body 1 is provided with four sets of support legs 2, and the lower surface of the four sets of support legs 2 is bonded with rubber pads.

[0024] The rubber pads increase the stability of the dryer body 1 when it is placed, and prevent the support legs 2 from making hard contact with the placement surface, thus reducing noise. They also prevent the placement surface from causing wear on the support legs 2 and extend the service life of the support legs 2.

[0025] The constant temperature dehumidification component includes a compressor 12, which is fixedly installed inside the front end of the dryer body 1. A first connecting pipe 13 is fixedly installed on the upper end of the compressor 12. A first solenoid valve 14 is fixedly installed on the upper right side of the first connecting pipe 13. A second solenoid valve 15 is fixedly installed on the lower right side of the first connecting pipe 13. A second heat dissipation condenser 16 is fixedly installed inside the front end of the dryer body 1. The first connecting pipe 13 is fixedly connected to the first heat dissipation condenser 9 and the second heat dissipation condenser 16 respectively. A fourth connecting pipe 21 is provided at the lower end of the compressor 12. The right end of the fourth connecting pipe 21 is fixedly connected to the evaporator 7.

[0026] Low-temperature, low-pressure refrigerant is drawn into compressor 12 and compressed into high-temperature, high-pressure gas. If cooling is required according to the set temperature, the second solenoid valve 15 is opened while the first solenoid valve 14 is closed, allowing the high-temperature, high-pressure refrigerant to enter the second heat dissipation condenser 16. At this time, the cooler air fails to absorb heat in the first heat dissipation condenser 9, thus delivering stable, moderately warm dry air to the soft capsule drum or drying room to achieve cooling, dehumidification, and drying. Conversely, if heating is required in the soft capsule drum or drying room, the first solenoid valve 14 is opened and the second solenoid valve 15 is closed, allowing the high-temperature, high-pressure refrigerant to enter the first heat dissipation condenser 9. Moderately warm air absorbs heat here, then delivers warm dry air to the soft capsule drum or drying room to complete the heating, dehumidification, and drying process.

[0027] A liquid receiver 18 is fixedly installed inside the front end of the dryer body 1. The liquid receiver 18 is fixedly connected to the first heat dissipation condenser 9 and the second heat dissipation condenser 16. A third connecting pipe 19 is provided at the lower end of the liquid receiver 18. The third connecting pipe 19 is fixedly connected to the evaporator 7. A filter 20 is fixedly installed between the third connecting pipe 19 and the evaporator 7.

[0028] The filter 20 effectively prevents impurities in the liquid receiver 18 from entering the evaporator 7, ensuring the normal operation and dehumidification effect of the evaporator 7. At the same time, the liquid receiver 18 serves to store and regulate the refrigerant, making the refrigerant supply more stable during the operation of the dryer body 1, further improving the drying efficiency and effect.

[0029] A second connecting pipe 17 is fixedly installed on the left side of the second heat dissipation condenser 16. The second connecting pipe 17 is connected to the external circulation pump and the cooling tower.

[0030] By setting the second connecting pipe 17, the second heat dissipation condenser 16 is connected to the external circulating pump and cooling tower, thereby enabling the second heat dissipation condenser 16 to efficiently transfer heat to the cooling tower for heat dissipation treatment, ensuring the stability and reliability of the heat pump dryer during operation.

[0031] A second fan 22 is fixedly installed inside the front end of the dryer body 1. The second fan 22 is fixedly connected to the fourth connecting pipe 21 and the evaporator 7 respectively.

[0032] By setting up the second fan 22, forced convection of the humid air inside the evaporator 7 is achieved, which accelerates the heat exchange rate between the humid air and the evaporator 7, thereby improving the dehumidification efficiency. At the same time, the second fan 22 can also uniformly send the gas that has been compressed and transformed into high temperature and high pressure in the compressor 12 into the evaporator 7, ensuring the airflow and uniformity inside the dryer body 1, and further improving the drying efficiency and effect.

[0033] A filter plate 4 is fixedly installed inside the upper end of the dryer body 1. The filter plate 4 is located between the return air inlet 3 and the upper left opening of the cross-flow heat exchanger 6.

[0034] The filter plate 4 filters the humid air entering the dryer body 1 and removes some of the oil in the air. This effectively prevents dust and impurities in the humid air from entering the cross-flow heat exchanger 6 and evaporator 7, ensuring the normal operation and dehumidification effect of the cross-flow heat exchanger 6 and evaporator 7. At the same time, it also prevents dust and impurities from contaminating the dried items, improving the quality and service life of the dried items.

[0035] Working Principle: During operation, humid air to be dried is first introduced into the dryer body 1 through the return air inlet 3. The filter plate 4 filters the humid air entering the dryer body 1, removing some oil. The humid air undergoes initial pre-cooling and dehumidification as it passes through the cross-flow heat exchanger 6. Then, the humid air enters the evaporator 7. The second fan 22 forces convection within the evaporator 7, accelerating the heat exchange rate between the humid air and the evaporator 7. The evaporator 7 performs deep dehumidification, reducing the humidity. The dehumidified air then passes through the air duct 8 and the cross-flow heat exchanger 6 into the first condenser 9, where it exchanges heat with the incoming warm and humid air, pre-cooling and dehumidifying it. The first condenser 9 then heats the dehumidified air, raising its temperature. The heated air then passes through the first fan 10 and the air outlet 11. The dryer body 1 is discharged. Based on the set temperature of the soft capsule drum or drying room, if cooling is required, the second solenoid valve 15 is opened and the first solenoid valve 14 is closed. The compressor 12 draws in low-temperature, low-pressure refrigerant, which is then compressed into high-temperature, high-pressure gas. This high-temperature, high-pressure refrigerant enters the second heat dissipation condenser 16, transferring some heat to the cooling tower. At this time, the air at a relatively low temperature fails to absorb heat in the first heat dissipation condenser 9, thus delivering stable, moderately warm dry air to the soft capsule drum or drying room to achieve cooling, dehumidification, and drying. If the soft capsule drum or drying room needs to be heated, the first solenoid valve 14 is opened and the second solenoid valve 15 is closed, allowing the high-temperature, high-pressure refrigerant to enter the first heat dissipation condenser 9. The moderately warm air absorbs heat here, and then delivers warm dry air to the soft capsule drum or drying room to complete the heating, dehumidification, and drying process. This achieves precise control of the internal temperature and humidity of the dryer body 1.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heat pump dryer with constant temperature and dehumidification function, comprising a dryer body (1), characterized in that: A return air vent (3) is provided on the upper left side of the dryer body (1). Baffles (5) are symmetrically installed inside the dryer body (1). A cross-flow heat exchanger (6) is fixedly installed between the two sets of baffles (5). An evaporator (7) is fixedly installed inside the lower right side of the dryer body (1). An air duct (8) is provided inside the dryer body (1) to the right of the evaporator (7). A first heat dissipation condenser (9) is fixedly installed inside the lower left side of the dryer body (1). A first fan (10) is fixedly installed inside the lower left side of the dryer body (1). An air outlet (11) is opened at the left end of the dryer body (1). The air outlet (11) is fixedly connected to the first fan (10). A constant temperature dehumidification component is provided inside the front end of the dryer body (1).

2. A heat pump dryer with constant temperature and dehumidification function according to claim 1, characterized in that: The lower end of the dryer body (1) is provided with four sets of support legs (2), and the lower surface of the four sets of support legs (2) is bonded with rubber pads.

3. A heat pump dryer with constant temperature and dehumidification function according to claim 1, characterized in that: The constant temperature dehumidification component includes a compressor (12), which is fixedly installed inside the front end of the dryer body (1). A first connecting pipe (13) is fixedly installed at the upper end of the compressor (12). A first solenoid valve (14) is fixedly installed at the upper right end of the first connecting pipe (13). A second solenoid valve (15) is fixedly installed at the lower right end of the first connecting pipe (13). A second heat dissipation condenser (16) is fixedly installed inside the front end of the dryer body (1). The first connecting pipe (13) is fixedly connected to the first heat dissipation condenser (9) and the second heat dissipation condenser (16) respectively. A fourth connecting pipe (21) is provided at the lower end of the compressor (12). The right end of the fourth connecting pipe (21) is fixedly connected to the evaporator (7).

4. A heat pump dryer with constant temperature dehumidification function according to claim 3, characterized in that: A liquid reservoir (18) is fixedly installed inside the front end of the dryer body (1). The liquid reservoir (18) is fixedly connected to the first heat dissipation condenser (9) and the second heat dissipation condenser (16). A third connecting pipe (19) is provided at the lower end of the liquid reservoir (18). The third connecting pipe (19) is fixedly connected to the evaporator (7). A filter (20) is fixedly installed between the third connecting pipe (19) and the evaporator (7).

5. A heat pump dryer with constant temperature and dehumidification function according to claim 3, characterized in that: A second connecting pipe (17) is fixedly installed on the left side of the second heat dissipation condenser (16), and the second connecting pipe (17) is connected to an external circulating pump and a cooling tower.

6. A heat pump dryer with constant temperature and dehumidification function according to claim 3, characterized in that: A second fan (22) is fixedly installed inside the front end of the dryer body (1). The second fan (22) is fixedly connected to the fourth connecting pipe (21) and the evaporator (7) respectively.

7. A heat pump dryer with constant temperature and dehumidification function according to claim 1, characterized in that: A filter plate (4) is fixedly installed at the upper end of the dryer body (1). The filter plate (4) is located between the return air inlet (3) and the upper left opening of the cross-flow heat exchanger (6).

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