Drum-type heat pump dryer

Abstract

The utility model relates to a drum-type heat pump dryer which comprises a machine shell and is characterized in that the interior of the machine shell is divided into an upper layer and a lower layer which are separated by a water pan, a drying drum groove is formed in the upper layer, a groove door is arranged on the right side of the drying drum groove, a plurality of through holes are formed in the surface of the drying drum groove, and an air inlet fan, a compressor and a driving motor are arranged on the front portion and the rear portion of the left side of the lower layer respectively. An evaporator and a condenser are arranged in front of and behind the right side of the compressor respectively; an air outlet fan is arranged on the right side of the evaporator; an electronic expansion valve is arranged between the evaporator and the condenser, an air outlet temperature and humidity sensor is arranged between the air outlet fan and the evaporator, and an air inlet temperature and humidity sensor is arranged between the condenser and the drying roller groove. When the system is started, heat is fed into the drying roller groove through the evaporator, the condenser, the compressor and the electronic expansion valve, hot air is blown to materials, water on the materials is evaporated and discharged from the water pan, and the drying effect is achieved through continuous circulation.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pump dryers, in particular to a drum type heat pump dryer. Background Art

[0002] As a common drying equipment, drum dryer is widely welcomed due to its advantages such as good drying effect and easy operation. However, traditional drum dryers often have problems such as high energy consumption, low drying efficiency and thermal pollution to the environment during the drying process, which need to be improved and optimized. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the utility model provides a drum-type heat pump drying machine to solve the above-mentioned problems.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including a casing, characterized in that the casing is divided into two layers, separated by a water receiving tray, the upper layer is provided with a drying drum slot, the right side of the drying drum slot is provided with a slot door and a plurality of through holes on the surface, the left side of the lower layer is provided with an air inlet fan, a compressor, and a driving motor, the right side of the compressor is provided with an evaporator and a condenser, and the right side of the evaporator is provided with an air outlet fan; an electronic expansion valve is provided between the evaporator and the condenser, an air outlet temperature and humidity sensor is provided between the air outlet fan and the evaporator, an air inlet temperature and humidity sensor is provided between the condenser and the drying drum slot, and an air inlet and a drain are provided on the left side of the lower layer of the casing, the air inlet is connected to the air inlet fan, and the drain is connected to the water receiving tray. When the system is started, the evaporator, condenser, compressor, and electronic expansion valve are used to send heat into the drying drum slot, and the hot air is blown onto the material, and the moisture on the material evaporates and is discharged from the water receiving tray, and the cycle is continuous to achieve a drying effect.

[0007] Preferably, it includes a circulation system, a refrigerant circulation loop and an air circulation loop. The compressor is connected to the condenser, the electronic expansion valve, and the evaporator through a pipeline to form the refrigerant circulation loop; the drying drum tank is connected to the air outlet fan, the evaporator, and the condenser through a pipeline to form the air circulation loop. After placing the material in the drying drum tank, the system is started. First, the compressor compresses the refrigerant to make it a high-temperature, high-pressure gas. The high-temperature and high-pressure gas dissipates heat after passing through the condenser and becomes a high-pressure liquid. After that, the high-pressure liquid refrigerant enters the electronic expansion valve, and then the pressure suddenly decreases, causing the liquid refrigerant to quickly become a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant enters the evaporator, where it absorbs external heat, causing the refrigerant to become a gas, and then returns to the compressor to complete the refrigerant cycle. The outdoor fresh air is forced into the drying drum tank through the air inlet fan, and the air in the drying drum tank is passed into the evaporator through the air outlet fan, and enters the condenser after heat exchange. The hot air is exchanged in the condenser into hot air and passed into the drying drum tank to mix with the fresh air introduced from the air inlet fan. The formed mixed hot air is blown onto the material, and the moisture on the material evaporates to achieve the drying effect. The precipitated moisture is discharged from the water receiving tray, and the wet air is forced to be discharged from the air outlet fan and re-enters the evaporator to achieve circulation.

[0008] Preferably, a control system is included, which uses the inlet temperature and humidity sensor and the outlet temperature and humidity sensor to monitor the real-time temperature and humidity of drying and feed back to the controller, and controls the speed of the drive motor through the controller, drives the central axis of the drying drum tank to rotate around the axis, controls the speed of the inlet fan and the outlet fan, controls the opening of the electronic expansion valve, and controls the operating frequency of the compressor. Therefore, the user can adjust the drying conditions according to actual needs, control the system to adjust the above parameters, obtain the drying time when the set drying conditions are reached, and after the drying is completed, the system stops running. The utility model provides a drum-type heat pump dryer, which uses the design of refrigerant circulation and wind circulation to effectively utilize heat and improve the drying efficiency. At the same time, the refrigerant flow is controlled by adjusting the electronic expansion valve to achieve energy-saving effects. When the system is running, the controller improves the reliability of the dryer by adjusting the speed of the drying drum tank, the speed of the inlet fan and the outlet fan, the opening of the electronic expansion valve, and the operating frequency of the compressor, which is convenient for users to use.

[0009] (III) Beneficial effects

[0010] Compared with the prior art, the utility model provides a drum-type heat pump dryer, which has the following beneficial effects:

[0011] 1. The drum heat pump dryer uses the design of refrigerant circulation and air circulation to effectively utilize heat and improve drying efficiency. At the same time, the refrigerant flow is controlled by adjusting the electronic expansion valve to achieve energy-saving effects.

[0012] 2. The controller of the drum heat pump dryer improves the reliability of the dryer and facilitates user use by adjusting the rotation speed of the drying drum tank, the speed of the air inlet fan and the air outlet fan, the opening of the electronic expansion valve and the operating frequency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A left side schematic diagram of a drum type heat pump dryer according to an embodiment of this invention is shown.

[0014] Figure 2 A right side schematic diagram of a drum type heat pump dryer according to an embodiment of this invention is shown.

[0015] Figure 3 A front view schematic diagram of a drum-type heat pump dryer according to an embodiment of this invention is shown.

[0016] Figure 4 A top view schematically shows a drum-type heat pump dryer according to an embodiment of the present invention.

[0017] Figure 5 A partial structural schematic diagram of a drum-type heat pump dryer according to an embodiment of this invention is shown.

[0018] Figure 6 A schematic diagram of the circulation structure of a drum-type heat pump dryer according to an embodiment of this invention is shown.

[0019] Figure 7 A schematic diagram of the circuit principle of a drum-type heat pump dryer according to an embodiment of this invention is shown.

[0020] In the figure: 1. Drying drum tank; 2. Evaporator; 3. Condenser; 4. Electronic expansion valve; 5. Outlet temperature and humidity sensor; 6. Inlet temperature and humidity sensor; 7. Inlet fan; 8. Outlet fan; 9. Compressor; 10. Drive motor; 11. Water tray; 12. Air inlet; 13. Drain outlet; 14. Slot door. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 5 , a drum-type heat pump dryer, comprising a casing, characterized in that: the interior of the casing is divided into an upper and lower layer, separated by a water receiving tray 11, a drying drum tank 1 is provided in the upper layer, a tank door 14 is provided on the right side of the drying drum tank 1 and a plurality of through holes are provided on the surface, a controller (not shown in the figure) is provided on the rear side of the lower layer, an air inlet fan 7, a compressor 9 and a driving motor 10 are provided on the front and rear sides of the left side of the lower layer, an evaporator 2 and a condenser 3 are provided on the front and rear sides of the right side of the compressor 9, an air outlet fan 8 is provided on the right side of the evaporator 2; an electronic expansion valve 4 is provided between the evaporator 2 and the condenser 3, an air outlet temperature and humidity sensor 5 is provided between the air outlet fan 8 and the evaporator 2, an air inlet temperature and humidity sensor 6 is provided between the condenser 3 and the drying drum tank 1, an air inlet 12 and a drain 13 are provided on the left side of the lower layer of the casing, the air inlet 12 is connected to the air inlet fan 7, and the drain 13 is connected to the water receiving tray 11. When the system starts, the evaporator 2, condenser 3, compressor 9 and electronic expansion valve 4 are used to send heat into the drying drum tank 1, and the hot air is blown onto the material, and the moisture on the material evaporates and is discharged from the water receiving tray 11, and the cycle is continuously repeated to achieve a drying effect.

[0023] Further, see Figure 6 , including a circulation system, a refrigerant circulation loop and an air circulation loop. The compressor 9 is connected to the condenser 3, the electronic expansion valve 4, and the evaporator 2 through a pipeline to form the refrigerant circulation loop; the drying drum tank 1 is connected to the air outlet fan 8, the evaporator 2, and the condenser 3 through a pipeline to form the air circulation loop. After placing the material in the drying drum tank 1, the system is started. First, the compressor 9 compresses the refrigerant to make it a high-temperature, high-pressure gas. After passing through the condenser 3, the high-temperature and high-pressure gas dissipates heat and becomes a high-pressure liquid. After that, the high-pressure liquid refrigerant enters the electronic expansion valve 4, and then the pressure suddenly decreases, causing the liquid refrigerant to quickly become a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant enters the evaporator 2, where it absorbs external heat, causing the refrigerant to become a gaseous state and return to the compressor 9 to complete the refrigerant cycle. Outdoor fresh air is forced into the drying drum tank 1 through the air inlet fan 7, and the air in the drying drum tank 1 is passed into the evaporator 2 through the air outlet fan 8, and enters the condenser 3 after heat exchange. The hot air is exchanged in the condenser 3 into hot air and passed into the drying drum tank 1 to mix with the fresh air introduced from the air inlet fan 7. The formed mixed hot air is blown onto the material, and the moisture on the material evaporates to achieve the drying effect. The precipitated moisture is discharged from the water receiving tray 11, and the wet air is forced to be discharged from the air outlet fan 8 and re-enters the evaporator 2 to achieve circulation.

[0024] Further, see Figure 7, and also includes a control system, using the inlet temperature and humidity sensor 6 and the outlet temperature and humidity sensor 5 to monitor the real-time temperature and humidity of drying and feed back to the controller, and controlling the speed of the driving motor 10 through the controller, driving the central axis of the drying drum tank 1 to rotate around the axis, controlling the speed of the inlet fan 7 and the outlet fan 8, controlling the opening of the electronic expansion valve 4, and controlling the operating frequency of the compressor 9. The inlet fan 7, the outlet fan 8, the compressor 9, the inlet temperature and humidity sensor 6, the outlet temperature and humidity sensor 5, the electronic expansion valve 4 and the driving motor 10 are powered by an external power supply. Those skilled in the art can control the power supply and the on and off of each component through the power switch to control each component to power on and work, that is, the user closes the power switch, the power supply powers all components, and all components are powered on and work. Therefore, the user can adjust the drying conditions according to actual needs, control the system to adjust the above parameters, obtain the drying time when the set drying conditions are reached, and the system stops running after the drying is completed. The drum heat pump dryer utilizes the design of refrigerant circulation and air circulation to effectively utilize heat and improve drying efficiency. At the same time, the refrigerant flow is controlled by adjusting the electronic expansion valve 4 to achieve energy saving. When the system is running, the controller improves the reliability of the dryer and facilitates user use by adjusting the speed of the drying drum tank 1, the speed of the air inlet fan 7 and the air outlet fan 8, the opening of the electronic expansion valve 4, and the operating frequency of the compressor 9.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drum heat pump dryer, comprising a casing, characterized in that: The interior of the casing is divided into two layers, an upper layer and an lower layer, separated by a water receiving tray (11); the upper layer is provided with a drying drum slot (1); a slot door (14) is provided on the right side of the drying drum slot (1) and a plurality of through holes are provided on the surface; an air inlet fan (7), a compressor (9) and a drive motor (10) are provided on the front and rear sides of the left side of the lower layer; an evaporator (2) and a condenser (3) are provided on the front and rear sides of the right side of the compressor (9); an air outlet fan (8) is provided on the right side of the evaporator (2); and an electronic expansion valve (4) is provided between the evaporator (2) and the condenser (3); An outlet air temperature and humidity sensor (5) is provided between the outlet air fan (8) and the evaporator (2), and an inlet air temperature and humidity sensor (6) is provided between the condenser (3) and the drying drum tank (1).

2. A drum type heat pump dryer according to claim 1, characterized in that: An air inlet (12) and a water outlet (13) are respectively provided on the left side of the lower layer of the casing; the air inlet (12) is connected to the air inlet fan (7), and the water outlet (13) is connected to the water receiving tray (11).

3. A drum type heat pump dryer according to claim 1, characterized in that: It comprises a circulation system, a refrigerant circulation loop and an air circulation loop; the compressor (9) is connected with the condenser (3), the electronic expansion valve (4) and the evaporator (2) through a pipeline to form the refrigerant circulation loop; The drying drum tank (1) is connected to the air outlet fan (8), the evaporator (2), and the condenser (3) through a pipeline to form the air circulation loop.

4. A drum type heat pump dryer according to claim 1, characterized in that: It comprises a control system, which controls the rotation speed of the driving motor (10) through a controller, drives the central axis of the drying drum tank (1) to rotate around the axis, controls the rotation speed of the air inlet fan (7) and the air outlet fan (8), controls the opening of the electronic expansion valve (4), and controls the operating frequency of the compressor (9).

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