A drying and dehumidifying apparatus

Abstract

The application relates to a drying and dehumidifying device, which comprises a heat pump assembly, a closed box body and a first heat exchange fin, a second heat exchange fin and a compressor connected through a coolant pipe; the closed box body is divided into a storage area at the bottom, a drying and transporting area in the middle and a heating and dehumidifying area at the top through a heat insulation closing door, the first heat exchange fin is arranged in the heating and dehumidifying area and used for increasing the temperature in the heating and dehumidifying area, a first ventilation mechanism is arranged in the heating and dehumidifying area and used for discharging humid air in the heating and dehumidifying area, the second heat exchange fin is arranged in the drying and transporting area and used for reducing the temperature in the drying and transporting area, and a conveying belt for conveying materials from the heating and dehumidifying area into the drying and transporting area to the storage area is arranged in the drying and transporting area. The application has the effect of keeping the feed dry during temperature reduction.

Description

Technical Field

[0001] This application relates to the technical field of feed processing, and in particular to a drying and dehumidification device. Background Technology

[0002] If processed feed is not dried and stored in time, it is prone to spoilage. Drying equipment can quickly dry the feed, but existing drying equipment only performs drying, which results in the dried feed still being at a high temperature. During the subsequent cooling process, moisture will invade again, causing the feed to spoil. Summary of the Invention

[0003] In order to keep the feed dry during the cooling process, this application provides a drying and dehumidification device.

[0004] The drying and dehumidification equipment provided in this application adopts the following technical solution:

[0005] A drying and dehumidifying device, comprising:

[0006] A heat pump assembly, comprising a first heat exchange fin, a second heat exchange fin, and a compressor, wherein the first heat exchange fin, the second heat exchange fin, and the compressor are connected via a coolant pipe; a sealed enclosure, the sealed enclosure being divided by an insulated shut-off door into a bottom storage area, a middle drying and transporting area, and a top heating and dehumidifying area, wherein the storage area and the heating and dehumidifying area are respectively located at opposite ends of the drying and transporting area; the first heat exchange fin is located within the heating and dehumidifying area to increase the temperature within the heating and dehumidifying area; a first ventilation mechanism is provided within the heating and dehumidifying area to exhaust humid air within the heating and dehumidifying area; a feed shut-off door is located at the top of the heating and dehumidifying area; the second heat exchange fin is located within the drying and transporting area to decrease the temperature within the drying and transporting area; a conveyor belt is provided within the drying and transporting area to transport materials entering the drying and transporting area from the heating and dehumidifying area to the storage area; a discharge shut-off door is located at the bottom of the storage area; and an equipment box, wherein the compressor is located within the equipment box.

[0007] By adopting the above technical solution, the first heat exchange fins can heat the heating and dehumidification zone, causing the moisture in the wet feed to evaporate. As the moisture evaporates, the humidity in the heating and dehumidification zone gradually increases. The first ventilation mechanism is activated, which discharges the moisture from the heating and dehumidification zone and introduces drier air from the outside atmosphere, thus drying the feed. The dried feed then enters the drying and transport zone, where the second heat exchange fins can cool it down. The feed is quickly cooled to room temperature in the drying and transport zone, avoiding the increase in humidity caused by natural cooling in the outside environment. Subsequently, it is transported to the storage area for storage by the conveyor belt.

[0008] Optionally, the first ventilation mechanism includes a first air duct passing through the heating and dehumidifying zone, an air inlet shut-off door located at one end of the first air duct, an air outlet shut-off door on the opposite side of the air inlet shut-off door, a first humidity sensor, and a first fan. The air duct is connected to the sealed enclosure, and a ventilation mesh is provided at the connection between the air duct and the sealed enclosure. The first fan is located on the side of the heating and dehumidifying zone near the air inlet shut-off door and faces the air outlet shut-off door. The first humidity sensor is located on the side of the first fan near the heating and dehumidifying zone, and the first humidity sensor is signal-connected to the air inlet shut-off door and the air outlet shut-off door.

[0009] By adopting the above technical solution, the first fan can make the air flow in the heating and dehumidification zone when the air inlet shut-off door and the air outlet shut-off door are closed, so that the temperature in the entire area is more uniform. It can also make the outside air enter through the air inlet shut-off door and the original air in the heating and dehumidification zone exit through the air outlet shut-off door when the air inlet shut-off door and the air outlet shut-off door are opened. The humidity sensor can detect the humidity in the heating and dehumidification zone. When the humidity is high, the air inlet shut-off door and the air outlet shut-off door are opened to allow the outside air to exchange with the heating and dehumidification zone. When the humidity is low, the air inlet shut-off door and the air outlet shut-off door are closed to allow the air to flow in the heating and dehumidification zone.

[0010] Optionally, the first heat exchange fins are located on the side of the heating and dehumidification zone near the first fan.

[0011] By adopting the above technical solution, the first heat exchange fins are set on the air outlet side of the first fan, which facilitates the circulation of heat in the heating and dehumidification zone.

[0012] Optionally, the drying transport area is provided with a plurality of second fans, the second heat exchange fins are located below the conveyor belt, and the plurality of second fans are located below the second heat exchange fins and are arranged toward the second heat exchange fins.

[0013] By adopting the above technical solution, the second heat exchange fins are set on the air outlet side of the second fan, which facilitates the circulation of cold air in the dry transport area.

[0014] Optionally, the conveyor belt is a roller conveyor belt or a chain conveyor belt.

[0015] By adopting the above technical solution, the roller conveyor belt or chain conveyor belt has gaps, which allows cold air to pass through the gaps and blow away the feed, thereby cooling the feed.

[0016] Optionally, the second heat exchange fin is provided with a ventilation mesh cover on the side near the conveyor belt.

[0017] By adopting the above technical solution, the ventilation mesh can prevent feed from falling into the second fan and damaging it.

[0018] Optionally, a second ventilation mechanism is provided in the drying transport area. The second ventilation mechanism includes a circulating air outlet at the top of the drying transport area, a circulating air inlet at one side of the drying transport area and located below the second fan in the vertical direction, a second humidity sensor, and a second air duct. One end of the second air duct is connected to the circulating air outlet, and the other end is connected to the circulating air inlet. The second humidity sensor is located at the top of the drying transport area and is signal-connected to the circulating air outlet and the circulating air inlet.

[0019] By adopting the above technical solution, the gas in the dry transport area can be circulated, achieving the effect of dehumidification.

[0020] Optionally, the second air duct is provided with a heat insulation layer.

[0021] By adopting the above technical solution, the cooling effect can be avoided by the gas being affected by the external environment during the flow circulation in the dry transport area.

[0022] Optionally, the heat pump assembly further includes a liquid storage tank, a dryer filter, a solenoid valve, and an expansion valve. The liquid storage tank, the dryer filter, the solenoid valve, and the expansion valve are all located inside the equipment housing. The liquid storage tank, the dryer filter, the solenoid valve, and the expansion valve are located downstream of the first heat exchange fins along the flow direction of the coolant.

[0023] By adopting the above technical solution, the pressure of the coolant can be reduced by using the solenoid valve and expansion valve, making it easier for the coolant to absorb heat and vaporize at the second heat exchange fin. The liquid storage tank can store the coolant and also facilitate the replenishment of coolant by the staff. The dryer filter can filter impurities and unvaporized liquid in the coolant, avoiding damage to the compressor.

[0024] Optionally, the coolant pipe is provided with a heat insulation sleeve.

[0025] By adopting the above technical solution, it is possible to avoid phase conversion of the coolant in environments other than the heating and dehumidification zone and the dry transportation zone.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. It can keep feed dry during the cooling process;

[0028] 2. It can improve energy efficiency. Attached Figure Description

[0029] Figure 1This is a schematic diagram of the drying and dehumidification equipment according to an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the internal structure of the equipment box according to an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the internal structure of the heating and dehumidification zone in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the internal structure of the dry transport area in an embodiment of this application.

[0033] Explanation of reference numerals in the attached drawings: 1-Heat pump assembly; 101-Compressor; 102-First heat exchange fin; 103-Liquid storage tank; 104-Drying filter; 105-Solenoid valve; 106-Expansion valve; 107-Second heat exchange fin; 108-Coolant pipe; 2-Heating and dehumidifying zone; 201-First air duct; 202-Inlet shut-off door; 203-Outlet shut-off door; 204-First fan; 205-Feed shut-off door; 3-Drying and transporting zone; 301-Conveyor belt; 302-Second fan; 303-Circulating air outlet door; 304-Circulating air inlet door; 305-Second air duct; 4-Storage area; 401-Discharge shut-off door; 5-Equipment box; 6-Insulated shut-off door; 7-Ventilation mesh cover. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0035] This application discloses a drying and dehumidification device.

[0036] like Figure 1 As shown, the drying and dehumidifying equipment includes a sealed box made of heat-insulating material. Its interior is divided into a bottom storage area 4, a middle drying and transporting area 3, and a top heating and dehumidifying area 2 by a heat-insulating shut-off door 6. The storage area 4 and the heating and dehumidifying area 2 are respectively located at both ends of the drying and transporting area 3.

[0037] The heating and dehumidification zone 2 is used to store the processed feed and to heat and dehumidify it. The drying and transportation zone 3 is used to transport the heated and dehumidified feed and lower its temperature during transportation before finally transporting it to the storage zone 4 for storage.

[0038] In order to heat the heating and dehumidification zone 2 and cool the drying and transport zone 3, the drying and dehumidification equipment includes a heat pump assembly 1, which includes a compressor 101, a first heat exchange fin 102, a liquid storage tank 103, a drying filter 104, a solenoid valve 105, an expansion valve 106, and a second heat exchange fin 107.

[0039] The heat pump assembly 1 is filled with coolant, which circulates through the compressor 101, the first heat exchange fin 102, the storage tank 103, the dryer filter 104, the solenoid valve 105, the expansion valve 106, and the second heat exchange fin 107, exchanging heat through phase transitions. The compressor 101 pressurizes the gaseous coolant, converting it from a low-pressure gaseous state to a high-pressure gaseous state. The high-pressure gaseous coolant then releases heat at the first heat exchange fin 102, undergoing a phase change to become a high-pressure liquid coolant. After entering the storage tank 103, the high-pressure liquid coolant passes through the dryer filter 104 to remove impurities and unvaporized liquid. The flow rate of the high-pressure liquid coolant is controlled by the solenoid valve 105 and the expansion valve 106, causing the high-pressure liquid coolant after passing through the expansion valve 106 to become a low-pressure liquid coolant. The low-pressure liquid coolant then absorbs heat at the second heat exchange fin 107, undergoing a phase change to become a low-pressure gaseous coolant. Finally, the cycle returns to compressor 101 and continues.

[0040] like Figure 1 and Figure 2 As shown, to protect all components within the heat pump assembly 1 except for the first heat exchange fin 102 and the second heat exchange fin 107, the drying and dehumidifying equipment can also be equipped with an equipment box 5. The equipment box 5 can be located below the drying transport area 3 of the sealed enclosure. The compressor 101, liquid storage tank 103, drying filter 104, solenoid valve 105, and expansion valve 106 are all located inside the equipment box 5. The coolant pipe 108 exposed outside the equipment box 5 and the sealed enclosure can be fitted with a heat insulation sleeve to prevent the coolant from undergoing phase conversion in environments outside the heating and dehumidifying area 2 and the drying transport area 3.

[0041] In addition to raising the temperature of the feed, the heating and dehumidification zone 2 also needs to dehumidify it. Therefore, the heating and dehumidification zone 2 is equipped with a first ventilation mechanism.

[0042] like Figure 1 and Figure 3 As shown, the first ventilation mechanism includes a first air duct 201, which runs through the heating and dehumidification zone 2 and is connected to the sealed box to guide the moisture in the heating and dehumidification zone 2 away from the heating and dehumidification zone 2 and to guide dry gas into the heating and dehumidification zone 2. A ventilation mesh cover 7 is provided at the connection between the air duct and the sealed box. The ventilation mesh cover 7 can prevent the feed from being blown away from the heating and dehumidification zone 2 during the gas exchange process, and at the same time prevent dust, lint, and other particles in the air from entering the heating and dehumidification zone 2.

[0043] like Figure 1 and Figure 3As shown, the first ventilation mechanism also includes an air inlet shut-off door 202, an air outlet shut-off door 203, and a first fan 204. The air inlet shut-off door 202 is located at one end of the first air duct 201, and the air outlet shut-off door 203 is located on the opposite side of the air inlet shut-off door 202. The straight air duct facilitates air circulation. The first fan 204 is located on the side of the heating and dehumidifying zone 2 near the air inlet shut-off door 202 and faces the air outlet shut-off door 203. When the air inlet shut-off door 202 and the air outlet shut-off door 203 are closed, the first fan 204 can circulate the air in the heating and dehumidifying zone 2, making the temperature in the entire area more uniform. When the air inlet shut-off door 202 and the air outlet shut-off door 203 are open, it can allow outside air to enter through the air inlet shut-off door 202 and allow the original air in the heating and dehumidifying zone 2 to be discharged through the air outlet shut-off door 203. Meanwhile, when the air inlet shut-off door 202 and the air outlet shut-off door 203 are closed, in order to facilitate the circulation of heat in the heating and dehumidification zone 2, the first heat exchange fin 102 can be located on the side of the heating and dehumidification zone 2 close to the first fan 204.

[0044] In addition, the first ventilation mechanism is equipped with a first humidity sensor, which is installed within the heating and dehumidification zone 2 and is signal-connected to the inlet shut-off door 202 and the outlet shut-off door 203. The first humidity sensor is responsible for detecting the humidity level within the heating and dehumidification zone 2. When the detected humidity is higher than a preset value, the inlet shut-off door 202 and the outlet shut-off door 203 will open to facilitate gas exchange between the outside environment and the heating and dehumidification zone 2. When the humidity drops below the preset value, the inlet shut-off door 202 and the outlet shut-off door 203 will close to maintain air circulation within the heating and dehumidification zone 2.

[0045] Finally, as Figure 1 and Figure 3 As shown, in order to allow the feed to enter the heating and dehumidification zone 2, the top of the heating and dehumidification zone 2 is provided with a feed shut-off door 205. In order to maintain the temperature of the heating and dehumidification zone 2, the feed shut-off door 205 can also be made of heat insulation material.

[0046] The drying and transporting zone 3 needs to lower the temperature of the feed that has undergone heating and dehumidification treatment, and then transport it to the storage zone 4. Therefore, the drying and transporting zone 3 is equipped with a conveyor belt 301 and multiple second fans 302.

[0047] like Figure 1 and Figure 4As shown, to facilitate the circulation of cold air within the drying transport zone 3, a second heat exchange fin 107 is positioned below the conveyor belt 301, and multiple second fans 302 are positioned below and facing the second heat exchange fin 107. When the second fans 302 start operating, the air blown by the second fans 302 passes through the second heat exchange fin 107 and blows the cold air near the second heat exchange fin 107 throughout the entire drying transport zone 3, thereby cooling the drying transport zone 3.

[0048] like Figure 1 and Figure 4 As shown, to ensure that the air blown by the second fan 302 can fully contact the feed on the conveyor belt 301, the conveyor belt 301 can be either a roller conveyor belt with gaps or a chain conveyor belt. In this embodiment, the conveyor belt 301 is a chain conveyor belt. The cold air can directly contact the feed on the chain conveyor belt through the gaps, further improving the cooling effect. At the same time, to prevent the feed from falling into the second fan 302 due to the influence of the cold air and damaging the second fan 302, a ventilation screen 7 is provided on the side of the second heat exchange fin 107 near the conveyor belt 301. The ventilation screen 7 can intercept the feed that falls from the conveyor belt 301 due to the influence of the cold air, preventing the feed from falling into the second fan 302.

[0049] Because moisture can re-enter the feed during the cooling process, causing spoilage, rapid cooling can reduce feed growth during this phase. Lowering the ambient humidity also helps reduce feed growth during cooling. Therefore, a second ventilation system is installed in the drying and transporting zone 3 to reduce humidity.

[0050] like Figure 1 and Figure 4 As shown, the second ventilation mechanism includes a circulating air outlet 303 located at the top of the drying transport area 3, a circulating air inlet 304 located on one side of the drying transport area 3 and below the second fan 302 in the vertical direction, and a second air duct 305. One end of the second air duct 305 is connected to the circulating air outlet 303, and the other end is connected to the circulating air inlet 304. To improve circulation efficiency, there can be multiple second ventilation mechanisms; in this embodiment, there are four second ventilation mechanisms.

[0051] Under the influence of the second fan 302, the gas in the drying transport zone 3 can circulate in the drying transport zone 3 along the direction of the fan, the second heat exchange fin 107 circulation outlet 303, the second air duct 305, and the circulation inlet 304, and finally return to the fan to continue circulating. A heat insulation layer can be provided in the second air duct 305 to prevent the gas from being affected by the external environment during circulation and reduce the cooling effect.

[0052] The circulation allows the air in the dry transport zone 3 to flow through the second heat exchange fin 107. After the coolant of the heat pump component 1 absorbs heat at the second heat exchange fin 107 and changes from a low-pressure liquid state to a low-pressure gas state, the temperature near the second heat exchange fin 107 will drop significantly, and the air humidity will be in a supersaturated state. Excess water vapor will be released in the form of condensate and condense on the second heat exchange fin 107, ultimately achieving the effect of reducing the humidity in the air.

[0053] In addition, the second ventilation mechanism is equipped with a second humidity sensor, which is located at the top of the drying transport zone 3 and is signal-connected to the circulating air outlet 303 and the circulating air inlet 304. The second humidity sensor is responsible for detecting the humidity within the drying transport zone 3. When the air blown out by the second fan 302 passes the feed on the conveyor belt 301 and then passes the humidity sensor, it affects the data detected by the humidity sensor. When the detected humidity is higher than a preset value, the circulating air outlet 303 and the circulating air inlet 304 will open to achieve the effect of reducing the humidity in the air using the second heat exchange fins 107. When the humidity drops below the preset value, the circulating air outlet 303 and the circulating air inlet 304 will close to reduce the effective cooling area of ​​the second heat exchange fins 107 and improve the cooling efficiency.

[0054] Finally, the bottom of the storage area 4 can be equipped with a discharge shut-off door 401 to facilitate the staff to retrieve the dry feed.

[0055] The implementation principle of the drying and dehumidification equipment in this embodiment is as follows: Processed feed is placed into a sealed chamber through the feed shut-off door 205. Moisture in the feed evaporates into the air under the high temperature of the heating and dehumidification zone 2. Subsequently, when the humidity in the heating and dehumidification zone 2 is higher than a preset value, the inlet shut-off door 202 and the outlet shut-off door 203 open to facilitate gas exchange between the outside environment and the heating and dehumidification zone 2. When the humidity drops below the preset value, the inlet shut-off door 202 and the outlet shut-off door 203 close to maintain gas circulation within the heating and dehumidification zone 2. After the feed has completed heating and dehumidification in the heating and dehumidification zone 2, the heat-insulated shut-off door 6 connecting the heating and dehumidification zone 2 and the drying and transport zone 3 opens, and the feed enters the drying and transport zone 3 under gravity.

[0056] After entering the drying and transporting zone 3, the feed falls onto the conveyor belt 301. The feed is rapidly cooled by the blowing of the second fan 302. Subsequently, when the humidity detected by the second humidity sensor is higher than a preset value, the circulating air outlet 303 and circulating air inlet 304 will open to reduce the humidity in the air using the second heat exchange fins 107. When the humidity drops below the preset value, the circulating air outlet 303 and circulating air inlet 304 will close to reduce the effective cooling area of ​​the second heat exchange fins 107 and improve cooling efficiency. Finally, the feed leaves the conveyor belt 301 from the discharge end and passes through the insulated shut-off door 6 connecting the drying and transporting zone 3 and the storage zone 4 to reach the storage zone 4.

[0057] Finally, when feed is needed, the staff opens the discharge shut-off door 401 to retrieve the feed. Throughout the entire operation, the heat pump assembly 1, the first fan 204, and the second fan 302 are all in the normally open state.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drying and dehumidifying device, characterized in that, include: A heat pump assembly (1) includes a first heat exchange fin (102), a second heat exchange fin (107), and a compressor (101), wherein the first heat exchange fin (102), the second heat exchange fin (107), and the compressor (101) are connected by a coolant pipe (108). The sealed enclosure is divided into a bottom storage area (4), a middle drying and transport area (3), and a top heating and dehumidification area (2) by an insulated shut-off door (6). The storage area (4) and the heating and dehumidification area (2) are respectively located at opposite ends of the drying and transport area (3). The first heat exchange fins (102) are located in the heating and dehumidification area (2) to increase the temperature within the heating and dehumidification area (2). The heating and dehumidification area (2) is equipped with a first ventilation mechanism. The heating and dehumidification zone (2) is used to discharge the humid air in the heating and dehumidification zone (2). The heating and dehumidification zone (2) is provided with a feed shut-off door (205) at the top. The second heat exchange fins (107) are provided in the drying and transporting zone (3) to reduce the temperature in the drying and transporting zone (3). The drying and transporting zone (3) is provided with a conveyor belt (301) for transporting the material from the heating and dehumidification zone (2) to the storage zone (4). The storage zone (4) is provided with a discharge shut-off door (401) at the bottom. The compressor (101) is located inside the equipment box (5); The first ventilation mechanism includes a first air duct (201) passing through the heating and dehumidifying zone (2), an air inlet shut-off door (202) located at one end of the first air duct (201), an air outlet shut-off door (203) on the opposite side of the air inlet shut-off door (202), a first humidity sensor, and a first fan (204). The air duct is connected to the sealed box, and a ventilation mesh cover (7) is provided at the connection between the air duct and the sealed box. The first fan (204) is located on the side of the heating and dehumidifying zone (2) near the air inlet shut-off door (202) and facing the air outlet shut-off door (203). The first humidity sensor is located on the side of the first fan (204) near the heating and dehumidifying zone (2). The first humidity sensor is signal connected to the air inlet shut-off door (202) and the air outlet shut-off door (203). The drying transport area (3) is provided with a plurality of second fans (302), the second heat exchange fins (107) are located below the conveyor belt (301), and the plurality of second fans (302) are located below the second heat exchange fins (107) and are arranged toward the second heat exchange fins (107); The drying transport area (3) is provided with a second ventilation mechanism, which includes a circulating air outlet (303) at the top of the drying transport area (3), a circulating air inlet (304) on one side of the drying transport area (3) and located below the second fan (302) in the vertical direction, a second humidity sensor, and a second air duct (305). One end of the second air duct (305) is connected to the circulating air outlet (303), and the other end is connected to the circulating air inlet (304). The second humidity sensor is located at the top of the drying transport area (3) and is signal-connected to the circulating air outlet (303) and the circulating air inlet (304).

2. The drying and dehumidifying equipment according to claim 1, characterized in that: The first heat exchange fin (102) is located in the heating and dehumidification zone (2) on the side close to the first fan (204).

3. The drying and dehumidifying equipment according to claim 1, characterized in that: The conveyor belt (301) is a roller conveyor belt or a chain conveyor belt.

4. The drying and dehumidifying equipment according to claim 1, characterized in that: The second heat exchange fin (107) is provided with a ventilation mesh cover (7) on the side near the conveyor belt (301).

5. The drying and dehumidifying equipment according to claim 1, characterized in that: The second air duct (305) is equipped with a heat insulation layer.

6. The drying and dehumidifying equipment according to claim 1, characterized in that: The heat pump assembly (1) further includes a liquid storage tank (103), a dryer filter (104), a solenoid valve (105), and an expansion valve (106). The liquid storage tank (103), the dryer filter (104), the solenoid valve (105), and the expansion valve (106) are all located inside the equipment box (5). The liquid storage tank (103), the dryer filter (104), the solenoid valve (105), and the expansion valve (106) are located downstream of the first heat exchange fin (102) along the flow direction of the coolant.

7. The drying and dehumidifying equipment according to claim 1, characterized in that: The coolant pipe (108) is provided with a heat insulation sleeve.

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