Movable type cascade high-temperature air source heat pump dryer

Abstract

A movable type cascade high-temperature air source heat pump dryer belongs to the technical field of drying and comprises an air source heat pump and a drying box, the drying box comprises a box body, a circulating fan a and a circulating air duct, the circulating fan a is connected with the air source heat pump and the box body, and the circulating air duct is movably connected with the air source heat pump and the box body; the air source heat pump comprises a first-stage compression system and a second-stage compression system, a cascade structure is adopted to accumulate heat to output high-temperature hot air to dry crops, the efficiency is higher than that of a traditional air source heat pump drying box, the silk screen dehydrator is arranged, heat energy waste caused by air cooling in traditional condensation dehydration is avoided, the drying efficiency is higher, and the drying effect is better. And meanwhile, the flow guide grooves are formed in the inner wall of the box body, when the relative humidity in the box body is saturated, redundant water vapor can be adsorbed in the box body and is collected into small water drops to flow downwards to be discharged, and the problem that the drying efficiency is reduced due to accumulated water in a traditional air source heat pump drying box is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drying, and in particular relates to a mobile cascade high-temperature air source heat pump drying machine. Background Art

[0002] Drying refers to the process of removing solvents and retaining solids. It typically involves introducing hot air to evaporate and remove moisture from materials. Traditional drying requires additional fuel to heat the hot air, and is bulky. Air-source heat pump dryers are energy-saving and environmentally friendly drying equipment that has rapidly developed by replacing coal-fired furnaces with air-source heat pumps. They can be used for the primary processing and drying of various agricultural products. However, the hot air output temperature of conventional air-source heat pump dryers cannot meet the emergency drying requirements for crops under special circumstances, especially after exposure to extreme weather. These crops require rapid and efficient drying to minimize losses. Furthermore, most air-source heat pump dryers lack mobility and are not well suited for emergency drying.

[0003] A search revealed that the utility model with publication number CN210688954 provides an air-source heat pump dryer with a movable housing. The air-source heat pump dryer with a movable housing comprises a dryer body; four lifting mechanisms, each of which is mounted on the dryer body. The lifting mechanisms comprise a threaded sleeve, a worm gear, a worm gear, and a first screw. The threaded sleeve is rotatably mounted on the bottom inner wall of the dryer body; the worm gear is fixedly mounted on the threaded sleeve; the worm gear is rotatably mounted on one side of the dryer body; the worm gear meshes with the worm gear; and the first screw is threadedly connected to the threaded sleeve; and four mounting boxes, each of which is fixedly mounted on the bottom end of a corresponding first screw. While this solves the problem of the air-source heat pump dryer being difficult to move, the drying efficiency is low, the output hot air temperature is low, and it is not well suited for emergency drying tasks. Summary of the Invention

[0004] A mobile cascade high-temperature air source heat pump dryer, including an air source heat pump and a drying box. The air source heat pump includes a primary compression system and a secondary compression system, and uses a cascade structure to accumulate heat to output high-temperature hot air; high-temperature hot air refers to air with a temperature above 60°C. The water content of air, also known as the humidity content of air, refers to the maximum amount of water vapor that a volume of air can hold. The water content increases with the increase of the air enthalpy value, and the air enthalpy value increases with the increase of the air temperature. Therefore, the higher the air temperature, the higher the air water content, and the same volume of air can hold more water. Steam, and at the same time, the evaporation rate of moisture inside crops gradually accelerates with the increase of temperature. Therefore, within a reasonable temperature range, the higher the temperature, the greater the water content of the air, the more water vapor is absorbed, and the better the drying effect on crops. However, when the water vapor that the air can accommodate at this temperature reaches the maximum, that is, the air reaches saturated humidity, the air can no longer accommodate water vapor. At this time, if the water vapor in the air is not removed, the crops cannot be further dried. This air source heat pump can output 125℃ hot air into the drying box to dry crops, reducing the drying time of crops and increasing drying efficiency.

[0005] The first-stage compression system includes a fin heat exchanger a, a gas-liquid separator a, an expansion valve a, a first-stage compressor, and a liquid storage tank a;

[0006] One end of the fin heat exchanger a is connected to the feed port of the gas-liquid separator a; there is a gas-liquid mixed working medium inside the fin heat exchanger a to absorb heat from the air, wherein the liquid working medium absorbs the heat from the air and converts into gaseous working medium, forming a low-pressure and low-temperature gas-liquid mixed working medium b and finally enters the gas-liquid separator a for gas-liquid separation step.

[0007] Expansion valve a, the other end of fin heat exchanger a is connected to the low-pressure outlet of expansion valve a; expansion valve a inputs a low-temperature and low-pressure gas-liquid mixed working medium into fin heat exchanger a, and b low-temperature and low-pressure working medium absorbs heat from the air in fin heat exchanger a, and the temperature of b low-temperature and low-pressure working medium is higher than that of a low-temperature and low-pressure working medium.

[0008] The first-stage compressor and the gas-liquid separator a are connected to the input end of the first-stage compressor; the gas-liquid separator a separates the low-temperature and low-pressure gas-liquid mixed working fluid into gaseous working fluid and liquid working fluid, which are output to the first-stage compressor respectively. The first-stage compressor compresses the gaseous working fluid and finally outputs high-temperature and high-pressure liquid working fluid.

[0009] Liquid storage tank a, the output end of the first-stage compressor is connected to the input end of the liquid storage tank a, and a heat exchanger is connected between the first-stage compressor and the liquid storage tank a; the liquid working medium under high temperature and high pressure enters the heat exchanger to transfer heat to the circulating working medium in the second compression system, and the high-temperature and high-pressure liquid working medium flows out of the heat exchanger and becomes a low-temperature and high-pressure liquid working medium, and finally flows into the liquid storage tank.

[0010] The output end of the liquid storage tank a is connected to the high-pressure inlet of the expansion valve a. The low-temperature and high-pressure liquid working medium passes through the expansion valve a and is output as a low-temperature and low-pressure gas-liquid mixed working medium and enters the finned radiator a for circulation.

[0011] The secondary compression system absorbs heat from the primary compression system. The temperature and pressure of the working fluid circulating in the secondary compression system are higher than those in the primary compression system. In the following description, the descriptions of low temperature, low pressure, high temperature, and high pressure of the working fluid cannot be equated with the descriptions of the same words in the primary compression system above.

[0012] The two-stage compression system includes a finned radiator b, a gas-liquid separator b, a two-stage compressor, and an expansion valve b;

[0013] A heat exchanger is connected between the expansion valve b and the gas-liquid separator b. Inside the heat exchanger is a low-temperature, low-pressure gas-liquid mixed working medium, which absorbs heat from the first-stage compression system and enters the gas-liquid separator b.

[0014] The discharge port of the gas-liquid separator b is connected to the input end of the secondary compressor; the gas-liquid separator b separates the gas-liquid mixed working medium into gaseous working medium and liquid working medium and transmits them to the secondary compressor respectively. The secondary compressor compresses the low-temperature and low-pressure gaseous working medium into high-temperature and high-pressure liquid working medium and transmits them to the finned radiator b;

[0015] Finned radiator b, the output end of the secondary compressor is connected to one end of finned radiator b, and finned radiator b uses a fan to transfer the heat of the liquid working medium to the circulating air, forming hot air, and the liquid working medium becomes low-temperature and high-pressure and flows into the liquid storage tank b;

[0016] Expansion valve b, the output end of the liquid storage tank b is connected to the high-pressure inlet of the expansion valve b, and the low-pressure outlet input of the expansion valve b is connected to the feed port of the gas-liquid separator b; the low-temperature and high-pressure liquid working medium is converted into a low-temperature and low-pressure gas-liquid mixed working medium through the expansion valve b and enters the heat exchanger for circulation.

[0017] Furthermore, it also includes a drying box, which includes a box body, a circulating fan a and a circulating air duct. The circulating fan a is connected to the air outlet of the air source heat pump and the air inlet of the box body, and the circulating air duct movably connects the air inlet of the air source heat pump and the air outlet of the box body; high-temperature hot air is input into the box body through the circulating fan a to heat the air inside the box body, and the hot air naturally rises and enters the circulating air duct to form an air circulation. The movably connected circulating air duct facilitates subsequent maintenance and transportation.

[0018] Furthermore, a dehumidification fan is installed on the side of the box facing the circulation fan a, and an intake fan is installed on the top of the box close to the circulation fan a. When the air inside the box reaches the current temperature and the relative humidity inside the box is too high, the dehumidification fan can be turned on to discharge the hot air with excessive relative humidity in the box to remove moisture. At the same time, the intake fan can replenish the exhausted air to prevent the drying efficiency from being reduced due to air discharge.

[0019] Furthermore, a wire mesh dehydrator is installed inside the air supply duct of the circulating air duct, and the wire mesh dehydrator includes multiple ones. Dehydration fans are installed at the inlet and outlet of the air supply duct of the circulating air duct. The dehydration fan at the inlet slowly rotates and stirs the air, so that the air fully collides with the wire mesh dehydrator, thereby improving the dehydration efficiency. The dehydration fan at the outlet guides the hot air through the wire mesh dehydrator to accelerate the circulation efficiency. Water guide holes are provided on the lower surface of the circulating air duct, and a water collecting trough is provided on the lower surface of the air supply duct of the circulating air duct. The water collecting trough is installed at a certain angle to the horizontal angle so that the water flow in the water collecting trough is naturally gathered under the action of gravity, which is convenient for discharge. The drain outlet of the water collecting trough is connected to a drainage hose; multiple wire mesh dehydrators are arranged in the circulating air duct, which can be flexibly arranged according to actual conditions, including but not limited to uniform placement, dense placement in the front and sparse placement in the back, etc., and can be flexibly arranged according to different conditions. The use of wire mesh dehydrators avoids the waste of heat energy caused by traditional condensation dehydration to cool the air, and the drying efficiency is higher. A water collecting trough and water guide holes are arranged under the dehydrator for convenient water collection and discharge.

[0020] Furthermore, the drainage hose is connected to a water collecting tank, which is installed on one side of the box body. A drain valve is installed at the bottom of the water collecting tank. The installation of a water collecting tank is conducive to the utilization of water resources. The drain valve is installed under the water tank to ensure that air does not circulate during drainage, thereby avoiding negative pressure suction that causes air to enter the drying box and reduce the drying efficiency.

[0021] Furthermore, a guide groove is provided on the inner wall of the box. When the relative humidity in the box is saturated, excess water vapor will be adsorbed inside the box and gathered into small water droplets and flow downward. In order to avoid water accumulation and reduced drying efficiency, a water collecting chamber and a drain outlet are provided at the bottom of the box. Drain holes are provided around the bottom surface of the box to recover the accumulated water into the water collecting chamber. The drain outlet is connected to a drainage hose, which is connected to a water collecting tank. A drain valve is installed at the bottom of the water collecting tank. The drain valve prevents air from being sucked into the drying box due to negative pressure, which reduces the drying efficiency.

[0022] Furthermore, the box is equipped with a sealed door, a control system is installed on the outer shell of the air source heat pump, a lighting device is installed inside the box, the lighting device, the air source heat pump, the circulating fan a, the circulating fan b, the dehumidification fan, the intake fan and the dehydration fan are electrically connected to the control system, a lighting device and a temperature / humidity sensor are installed inside the box, and movable wheels are installed at the bottom of the box and the air source heat pump. The movable wheels installed at the bottom are convenient for movement, and can be moved to the vicinity of the crops that need to be dried, thereby reducing the waiting time for drying the crops.

[0023] Compared with the prior art, the present invention can achieve the following technical effects:

[0024] The use of cascade air source heat pumps can output hot air at higher temperatures, which can adapt to the emergency drying of various crops. At the same time, the higher temperature hot air can dry crops faster, improving the drying efficiency.

[0025] A variety of dehumidification methods are adopted, including the installation of dehumidification fans and air intake fans; when the air inside the box reaches the current temperature and the relative humidity inside the box is too high, the dehumidification fan can be turned on to discharge the hot air with excessive relative humidity inside the box to remove moisture. At the same time, the air intake fan can replenish the exhausted air to prevent the drying efficiency from being reduced due to air discharge. A wire mesh dehydrator is also provided to avoid the waste of heat energy caused by traditional condensation dehydration to cool the air, and the drying efficiency is higher. At the same time, a guide groove is provided on the inner wall of the box. When the relative humidity in the box is saturated, excess water vapor will be adsorbed inside the box and gathered into small water droplets flowing downward to avoid water accumulation in the drying box and reduce the drying efficiency.

[0026] The box body and the bottom of the air source heat pump are equipped with movable wheels, which are convenient for movement and transportation, have a faster response speed, and are more conducive to crop drying in emergency situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a cross-sectional structural diagram of the utility model;

[0028] Figure 2 It is an enlarged detailed view of part A of the present utility model;

[0029] Figure 3 This is the schematic diagram of an air source heat pump;

[0030] Figure 4 It is a side view of the utility model;

[0031] Figure 5 It is a front view of the utility model;

[0032] Figure 6 It is a top view of the box.

[0033] In the figure: 1. Air source heat pump, 101. Fin heat exchanger a, 102. Gas-liquid separator a, 103. Primary compressor, 104. Heat exchanger, 105. Liquid storage tank a, 106. Expansion valve a, 107. Gas-liquid separator b, 108. Secondary compressor, 109. Fin heat exchanger b, 110. Liquid storage tank b, 111. Expansion valve b, 2. Moving wheel, 3. Circulating fan a, 4. Material to be dried, 5. Dehumidification fan, 6. Box body, 601. Diversion trough, 602. Sealing door, 603. Control system, 604. Drain hole, 7. Water collection box, 701. Drain valve, 8. Circulation fan b, 9. Wire mesh dehydrator, 901. Dehydration fan, 902. Water collection trough, 903. Water diversion hole, 904. Drain port, 905. Drain hose, 10. Circulation air duct, 11. Inlet fan, 12. Temperature / humidity sensor. DETAILED DESCRIPTION

[0034] Example 1

[0035] like Figure 1-5 As shown:

[0036] The air source heat pump 1 includes a first-stage compression system and a second-stage compression system;

[0037] The first-stage compression system includes a fin heat exchanger a101, a gas-liquid separator a102, an expansion valve a106, a first-stage compressor 103, and a liquid storage tank a105;

[0038] One end of the fin heat exchanger a101 is connected to the feed port of the gas-liquid separator a102; the gas-liquid mixed working medium inside the fin heat exchanger a absorbs heat from the air and flows into the gas-liquid separator a102;

[0039] The other end of the expansion valve a106 is connected to the low-pressure outlet of the expansion valve a106; the expansion valve a106 inputs a low-temperature and low-pressure gas-liquid mixed working medium into the fin heat exchanger a101;

[0040] The discharge port of the first-stage compressor 103 and the gas-liquid separator a 102 are connected to the input end of the first-stage compressor 103; the gas-liquid separator a separates the low-temperature and low-pressure gas-liquid mixed working medium into a gaseous working medium and a liquid working medium, which are respectively output to the first-stage compressor 103. The first-stage compressor 103 compresses the gaseous working medium and finally outputs a high-temperature and high-pressure liquid working medium, which is then transported to the heat exchanger 104;

[0041] Liquid storage tank a105, the output end of the first-stage compressor 103 is connected to the input end of the liquid storage tank a105, and a heat exchanger 104 is connected between the first-stage compressor 103 and the liquid storage tank a105; the liquid working medium at high temperature and high pressure enters the heat exchanger 104 and transfers heat to the circulating working medium of the second compression system. After flowing out of the heat exchanger 104, the high-temperature and high-pressure liquid working medium becomes a low-temperature and high-pressure liquid working medium and finally flows into the liquid storage tank a105;

[0042] The output end of the liquid storage tank a105 is connected to the high-pressure inlet of the expansion valve a106; the low-temperature and high-pressure liquid working medium passes through the expansion valve a and is output as a low-temperature and low-pressure gas-liquid mixed working medium and enters the finned radiator a101 for circulation;

[0043] The secondary compression system absorbs heat from the primary compression system, and the temperature and pressure of the working fluid circulating in the secondary compression system are higher than those in the primary compression system;

[0044] The two-stage compression system includes a finned radiator b109, a gas-liquid separator b107, a two-stage compressor 108, and an expansion valve b111;

[0045] A heat exchanger 104 is connected between the expansion valve b111 and the gas-liquid separator b107. The heat exchanger 104 contains a low-temperature, low-pressure gas-liquid mixed medium, which absorbs heat from the first-stage compression system and enters the gas-liquid separator b107.

[0046] The discharge port of the gas-liquid separator b107 is connected to the input end of the secondary compressor 108; the gas-liquid separator b107 separates the gas-liquid mixed working medium into gaseous working medium and liquid working medium and delivers them to the secondary compressor 108 respectively. The secondary compressor 108 compresses the low-temperature and low-pressure gaseous working medium into high-temperature and high-pressure liquid working medium and delivers them to the finned heat sink b109;

[0047] Finned radiator b109, the output end of the secondary compressor 108 is connected to one end of the finned radiator b109, and the finned radiator b109 transfers heat to the circulating air and outputs high-temperature hot air;

[0048] It also includes a liquid storage tank b110, the other end of the finned radiator b109 is connected to the input end of the liquid storage tank b110, and the finned radiator b109 uses a fan to transfer the heat of the liquid working medium to the circulating air, so that the high-temperature and high-pressure liquid working medium is converted into a low-temperature and high-pressure liquid working medium and flows into the liquid storage tank b110. The output end of the liquid storage tank b110 is connected to the high-pressure inlet of the expansion valve b111, and the low-pressure outlet of the expansion valve b111 is connected to the feed inlet of the gas-liquid separator b107; the low-temperature and high-pressure liquid working medium is converted into a low-temperature and low-pressure gas-liquid mixed working medium through the expansion valve b111 and enters the heat exchanger 104 for circulation;

[0049] It also includes a drying box, which includes a box body 6, a circulating fan a3 and a circulating air duct 10. The circulating fan a3 is connected to the air outlet of the air source heat pump 1 and the air inlet of the box body 6. The circulating air duct 10 is movably connected to the air inlet of the air source heat pump 1 and the air outlet of the box body 6; the circulating air duct is movably connected to the air source heat pump and the box body; high-temperature hot air is input into the box body through the circulating fan a3 to heat the air inside the box body, and the hot air naturally rises into the circulating air duct to form an air circulation. The movably connected circulating air duct is convenient for subsequent maintenance and transportation.

[0050] Example 2

[0051] like Figure 1-6 As shown: when the air temperature inside the drying box reaches a predetermined temperature, but the relative humidity of the air at this temperature is saturated and needs to be dehumidified quickly, the dehumidification fan 5 is first turned on to directly discharge a part of the hot air with saturated humidity in the drying box to remove the water vapor in the drying box. When the dehumidification fan 5 is turned on, the output speed of the circulating fan a3 of the hot air is slowed down, and the dehumidification fan 5 is turned off after a period of time. At the same time, the air intake fan 11 is started to blow air into the drying box until the air pressure is balanced and the relative humidity is reduced to a preset level. Then the air intake fan 11 is turned off and the circulating fan 3 outputs hot air normally or speeds up the output of hot air as needed to restore the temperature of the drying box. Using the dehumidification fan to directly dehumidify is short in time and fast in speed, but the temperature in the drying box drops, which is not conducive to heat utilization.

[0052] Example 3

[0053] like Figure 1-2 As shown:

[0054] When the temperature of the drying box reaches the predetermined temperature, the relative humidity of the air is high, and the hot air moves upward. A circulating fan b8 is installed at the air inlet of the circulating air duct 10 to guide the hot air into the circulating air duct 10. After the hot air enters the circulating air duct 10, it is guided by the dehydration fan 901 to pass through the wire mesh dehydrator 9. When the hot air passes through the wire mesh dehydrator, the water vapor in the hot air continuously collides with the fine wires on the wire mesh dehydrator 10. Small water droplets form large water droplets attached to the wires in the process of colliding with the wire mesh. At the same time, the dehydration fan 901 installed at the air inlet rotates slowly, stirring the cutting air so that the air is in full contact with the wire mesh. To improve the dehydration efficiency, large water droplets flow downward under the action of gravity and eventually gather in the water guide hole 903, pass through the water guide hole 903 and drip into the water collecting tank 902. The water collecting tank 902 has a certain slope. The water flow gathers to the drain port 904 under the action of gravity, and enters the water collecting box 7 through the drainage hose 905 connected to the drain port 904. A drain valve 701 is installed at the bottom of the water collecting box 7. The drain valve 701 blocks the air from entering the box during drainage, avoiding direct drainage. The outside air will enter the circulating air duct 10 due to the negative pressure in the circulating air duct 10, causing the air temperature to drop, thereby affecting the drying efficiency.

[0055] Example 4

[0056] like Figure 1-6 As shown:

[0057] When the temperature in the drying box reaches the predetermined temperature, the air in the drying box reaches saturated humidity, but the moisture in the dried material 4 still flows outward. At this time, the water vapor in the box body 6 will adhere to the inner wall of the box body, and gradually merge into large water droplets during the adhesion process and flow downward. The inner wall of the box body 6 is provided with a guide groove 604, and the large water droplets move along the guide groove 604 to the bottom plate. Drain holes 604 are provided around the bottom plate. The large water droplets enter the water collection chamber through the drainage holes 604. The water collection chamber is inclined to better collect water. A drain port is provided at the lowest point of the water collection chamber, and the drain port is connected to a drain hose 905. The water flows through the drain hose 905 into the water collection box 7. A drain valve 701 is installed at the bottom of the water collection box 7. The drain valve 701 blocks the air from entering the box body during drainage, avoiding direct drainage. The outside air will enter the circulating air duct 10 due to the negative pressure in the circulating air duct 10, causing the air temperature to drop, thereby affecting the drying efficiency.

Claims

1. A mobile cascade high-temperature air source heat pump dryer, characterized by: The invention comprises an air source heat pump (1) and a drying box, wherein the drying box comprises a box body (6), a circulating fan a (3) and a circulating air duct (10), wherein the circulating fan a (3) is connected to the air outlet of the air source heat pump (1) and the air inlet of the box body (6), and the circulating air duct (10) is movably connected to the air inlet of the air source heat pump (1) and the air outlet of the box body (6); The air source heat pump (1) comprises a primary compression system and a secondary compression system, wherein the primary compression system comprises a fin heat exchanger a (101) and a gas-liquid separator a (102), and one end of the fin heat exchanger a (101) is connected to a feed port of the gas-liquid separator a (102); It also includes an expansion valve a (106), and the other end of the fin heat exchanger a (101) is connected to the low-pressure outlet of the expansion valve a (106); It also includes a first-stage compressor (103), and the discharge port of the gas-liquid separator a (102) is connected to the input end of the first-stage compressor (103); It also includes a liquid storage tank a (105), the output end of the first-stage compressor (103) is connected to the input end of the liquid storage tank a (105), and a heat exchanger (104) is connected between the first-stage compressor (103) and the liquid storage tank a (105); The output end of the liquid storage tank a (105) is connected to the high-pressure inlet of the expansion valve a (106), and the heat exchanger (104) transfers the heat collected by the primary compression system to the secondary compression system; The two-stage compression system comprises a gas-liquid separator b (107) and a two-stage compressor (108), wherein the discharge port of the gas-liquid separator b (107) is connected to the input end of the two-stage compressor (108); It also includes a fin radiator b (109), the output end of the secondary compressor (108) is connected to one end of the fin radiator b (109), and the fin radiator b (109) transfers heat to the circulating air and outputs hot air at a set temperature; It also includes a liquid storage tank b (110), and the other end of the finned heat sink b (109) is connected to the input end of the liquid storage tank b (110); The invention also includes an expansion valve b (111), wherein the output end of the liquid storage tank b (110) is connected to the high-pressure inlet of the expansion valve b (111), and the low-pressure outlet of the expansion valve b (111) is connected to the feed inlet of the gas-liquid separator b (107), and a heat exchanger (104) is connected between the expansion valve b (111) and the gas-liquid separator b (107).

2. The mobile cascade high-temperature air source heat pump dryer according to claim 1, characterized in that: A dehumidification fan (5) is installed on the side of the box body (6) facing the circulation fan a (3), and an air intake fan (11) is installed on the top of the box body (6).

3. The mobile cascade high-temperature air source heat pump dryer according to claim 1, characterized in that: A circulating fan b (8) is installed inside the circulating air duct (10), and the circulating fan b (8) is installed in the circulating air duct (10) near the air outlet of the drying box.

4. The mobile cascade high-temperature air source heat pump dryer according to claim 1, characterized in that: A wire mesh dehydrator (9) is installed inside the air supply duct of the circulating air duct (10), a water guide hole (903) is opened on the lower surface of the circulating air duct (10), a water collecting trough (902) is provided on the lower surface of the air supply duct of the circulating air duct (10), and a drainage hose (905) is connected to the drainage port of the water collecting trough (902).

5. The mobile cascade high-temperature air source heat pump dryer according to claim 4, characterized in that: The screen dehydrator (9) includes a plurality of dehydrators, a dehydration fan (901) is installed inside the circulating air duct (10), and the dehydration fan (901) is installed in the circulating air duct (10) near the air outlet of the drying box.

6. The mobile cascade high-temperature air source heat pump dryer according to claim 4, characterized in that: The drainage hose (905) is connected to a water collecting tank (7), which is installed on one side of the box body (6). A drain valve (701) is installed at the bottom of the water collecting tank (7).

7. The mobile cascade high-temperature air source heat pump dryer according to claim 1, characterized in that: The inner wall of the box body (6) is provided with a guide groove (601), the bottom of the box body (6) is provided with a water collecting chamber and a drain outlet, the inner bottom surface of the box body (6) is provided with drain holes (604) around, the drain outlet is connected to a drain hose (905), the drain hose (905) is connected to a water collecting box (7), and a drain valve (701) is installed at the bottom of the water collecting box (7).

8. A mobile cascade high-temperature air source heat pump dryer according to any one of claims 1 to 5, characterized in that: The box (6) is equipped with a sealed door (602), the housing of the air source heat pump (1) is equipped with a control system (603), the interior of the box (6) is equipped with a lighting device and a temperature / humidity sensor (12), the air source heat pump (1), the circulating fan a (3), the circulating fan b (8), the dehumidification fan (5), the air intake fan (11) and the dehydration fan (901) are electrically connected to the control system (603), and the box (6) and the bottom of the air source heat pump (1) are equipped with moving wheels (2).

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