A drying and preservation integrated machine and a drying and preservation method

Abstract

This invention relates to the field of drying and preservation equipment technology, and discloses an integrated drying and preservation machine and method. The integrated drying and preservation machine includes a material chamber, a return air duct connected to the material chamber, a return air dehumidification channel connected to the return air duct, a fresh air valve, an indoor fan, and a heat exchange assembly. The heat exchange assembly includes an indoor heat exchanger and an outdoor heat exchanger. The indoor heat exchanger and the indoor fan are arranged in the return air duct, and the airflow circulates between the material chamber and the return air duct. The return air dehumidification channel is equipped with a one-way air outlet structure, a dehumidification fan, and a static pressure box. During dehumidification, due to the addition of a return air dehumidification pipe and a static pressure box on the lower side of the return air duct, the one-way air outlet structure of the dehumidification fan will not cause airflow overflow, ensuring the stability of the drying chamber temperature. By setting up movable and fixed supports, the material can continuously switch its contact surface with the frame during the drying process, ensuring that the surface of the material can contact the circulating hot airflow and achieve a uniform drying effect.

Description

Technical Field

[0001] This invention relates to the field of drying and preservation equipment technology, specifically to an integrated drying and preservation machine and a drying and preservation method. Background Technology

[0002] In agricultural product processing or other fields, drying and preservation are often required. Currently, commonly used drying and preservation equipment generally uses heat pumps to regulate temperature. During the airflow circulation process, airflow may overflow at the exhaust fan location, causing temperature fluctuations inside the equipment, which is not conducive to the stability of the drying effect.

[0003] In addition, when the material storage space is large and there are many materials, the temperature in different parts of the material chamber is not uniform. This results in some areas being difficult to dry while others are overheated, leading to poor drying effect and inconsistent product quality. Therefore, a solution is needed that can adjust the parameters of different internal areas to ensure the drying effect of the materials.

[0004] This application is submitted in response to the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated drying and preservation machine and a drying and preservation method to overcome the problem of unstable temperature caused by airflow overflow at the dehumidification fan.

[0006] The present invention is achieved through the following technical solution.

[0007] The present invention discloses a drying and preservation integrated machine, comprising a material chamber, a return air duct connected to the material chamber, a return air dehumidification channel connected to the return air duct, a fresh air valve, an indoor fan, and a heat exchange component. The heat exchange component includes an indoor heat exchanger and an outdoor heat exchanger. The indoor heat exchanger and the indoor fan are arranged in the return air duct, and the airflow circulates in the material chamber and the return air duct. The return air dehumidification channel is provided with a one-way air outlet structure, a dehumidification fan, and a static pressure box.

[0008] Furthermore, the return air dehumidification duct is positioned towards the outdoor heat exchanger.

[0009] Furthermore, the material chamber is equipped with a material rack, which includes several layers of racks. Each layer of the rack includes at least three supports, some of which are fixed supports and the rest are movable supports. The movable supports are connected to a drive device and can move up and down relative to the fixed supports, allowing the material to switch support contact surfaces.

[0010] Furthermore, the drying and preservation integrated machine is equipped with a compensation component, which includes a compensation fan, a compensation duct, and a heating component. The support body is provided with an adjustment hole, and the support body is provided with an adjustment duct. The adjustment duct is connected to the main valve and the compensation duct.

[0011] Furthermore, a valve body assembly is provided in the regulating hole, and the valve body assembly closes when the valve core in the valve body assembly is pressed.

[0012] Furthermore, a spray assembly is provided in the regulating air duct, and the spray assembly is connected to the water tank.

[0013] Furthermore, a cooling component is provided in the regulating air duct.

[0014] Furthermore, the drying and preservation all-in-one machine is also equipped with casters.

[0015] A drying and preservation method, based on the above-mentioned drying and preservation integrated machine, in the drying mode: an indoor fan is used to realize airflow circulation, an indoor heat exchanger is used to adjust the temperature, when the humidity of the circulating airflow reaches the set value, the fresh air valve is opened, the dehumidification fan is started, and the airflow is discharged after passing through the static pressure box.

[0016] In preservation mode: the indoor heat exchanger is used to reduce temperature and adjust humidity.

[0017] Furthermore, in the drying mode, the following steps are also included: detecting the temperature in the material chamber, and using a compensation component to adjust the temperature for locations with uneven temperatures.

[0018] The beneficial effects of this invention are:

[0019] During dehumidification, the addition of a return air dehumidification duct and a static pressure box at the bottom of the return air duct prevents airflow overflow from the unidirectional exhaust structure of the dehumidification fan, ensuring stable oven temperature. By setting up movable and fixed supports, the material's contact surface with the frame continuously changes during the drying process, ensuring that the entire surface of the material is in contact with the circulating hot airflow, achieving uniform drying. Compensation components can compensate for temperature variations in areas of uneven temperature, improving drying consistency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the drying and preservation integrated machine in Example 1;

[0023] Figure 2 This is a schematic diagram of the drying and preservation integrated machine in Example 3;

[0024] Figure 3 This is a side view of the drying and preservation all-in-one machine;

[0025] Figure 4 This is a top view of the frame structure.

[0026] Figure 5 This is a schematic diagram of the internal structure of the support structure;

[0027] Figure 6 A schematic diagram showing the relative positional changes of the fixed support and the movable support;

[0028] Figure 7 This is a schematic diagram of the valve body assembly structure. Detailed Implementation

[0029] The following is combined with Figures 1-7 The present invention will be described in detail below. Example 1:

[0030] The present invention provides a drying and preservation integrated machine, such as... Figure 1 The system includes a body 10, which contains a material chamber 12, a return air duct 401 connected to the material chamber 12, a return air dehumidification channel 402 connected to the return air duct 401, a fresh air valve 13, an indoor fan 403, and a heat exchange assembly 30. The heat exchange assembly 30 includes an indoor heat exchanger 301, an outdoor heat exchanger 302, and an outdoor fan 303. The return air duct 401 includes channels located above and to the side of the material chamber 12. The indoor heat exchanger 301 and the indoor fan 403 are disposed in the return air duct 401, and the airflow circulates between the material chamber 12 and the return air duct 401. The return air dehumidification channel 402 is a channel composed of a one-way air outlet structure (such as a one-way valve or a one-way rotatable baffle plate, which can be disposed at the dehumidification port 406 on the outer shell or on the dehumidification fan 405), the dehumidification fan 405, and a static pressure box 40.

[0031] Specifically, a material rack 20 is provided in the material chamber, which includes several layers of rack 21. Several indoor fans 403 are provided and installed on the side wall of the material chamber 12. During drying, materials such as walnuts, tobacco leaves, and medicinal materials are placed on the material rack 20, the door is closed, and the rack is started. Under the action of the indoor fans 403, airflow circulation is achieved. The airflow is heated by the indoor heat exchanger 301. The airflow temperature during drying is generally between 25 and 80 degrees Celsius, and is adjusted accordingly according to the type of material. When the humidity detection device in the machine body 10 detects that the airflow humidity has reached the set value, the dehumidification step is started. The fresh air valve 13 is opened, and the dehumidification fan 405 is started. Part of the airflow is discharged through the static pressure box 404 and the one-way air outlet structure. The supplemented fresh air is heated by the indoor heat exchanger 301. When the humidity is lower than the set value, the fresh air valve 13 and the dehumidification fan 405 are closed.

[0032] This solution integrates drying and preservation. Utilizing the internal circulating fan and indoor fan 403, along with the heat exchange component 30, it can perform both drying and preservation modes, increasing the equipment's functionality. It enables precise temperature and humidity control, is easy to clean, and is suitable for crops, food, and other products, offering a wide range of beneficial effects.

[0033] The body 10 contains control components, which are generally implemented by a microcontroller, microprocessor or computer.

[0034] During dehumidification, the addition of a return air dehumidification pipe 402 and a static pressure box 404 below the return air duct 401 prevents airflow overflow from the unidirectional air outlet structure of the dehumidification fan, thus ensuring the stability of the drying room temperature.

[0035] In the preservation mode, the humidity is adjusted through PID control using temperature and humidity sensors in the unit to precisely control the indoor temperature, increase the dew point temperature, and reduce the relative humidity, while using the internal heat exchanger for efficient dehumidification.

[0036] During dehumidification, a drainage device is installed on the lower side of the indoor heat exchanger 301 to collect or discharge water.

[0037] Optionally, the drying and preservation machine is also equipped with casters 11. Example 2:

[0038] Based on Example 1, such as Figure 1 The exhaust port 406 is positioned facing the outdoor heat exchanger 302. During the exhaust process, the outdoor heat exchanger 302 can recover heat from the exhaust gas at a higher temperature, thereby achieving energy saving.

[0039] Specifically, when the return air dehumidification channel 402 is performing dehumidification operation, air is independently drawn from the return air duct and dehumidified by the dehumidification fan 405. The hot and humid air is discharged through the return air dehumidification channel 402. Since the outdoor heat exchanger 302 is located on the gas discharge path, heat recovery can be achieved by utilizing the outdoor heat exchanger 302 to achieve energy-saving effect. Example 3:

[0040] Based on Example 1 or 2, such as Figure 2 , Figure 4 The material rack 20 includes several layers of rack 21, each layer of rack 21 including at least three supports. In this embodiment, each layer is provided with five supports, some of which are fixed supports 201, and the remaining supports are movable supports 202, such as... Figure 3 The second and fourth sets of supports constitute a movable support 202. The movable support 202 is connected to each other by a transmission connector 203, which is connected to a drive device. The movable support 202 can move up and down relative to the fixed support 201, so that the material can switch the support contact surface.

[0041] The drive device can be implemented using a cylinder, hydraulic cylinder, lead screw slide rail, or crank rocker mechanism, etc. The drive device is connected to the transmission connector 203. After the drive device is activated, it causes the transmission connector 203 to move up and down in a cyclical motion, thereby causing the movable support 202 to move up and down in a cyclical motion. Figure 5 The lowest and highest points of the movable support 202 are both lower and higher than the fixed support 201, which allows the material to continuously switch its contact surface with the frame 21 during the drying process, so that the surface of the material can be in contact with the circulating hot airflow and achieve a uniform drying effect. Example 4:

[0042] Based on any one of the embodiments in Example 1, 2, and 3, preferably based on Example 3,

[0043] The drying and preservation all-in-one machine is equipped with a compensation component, such as... Figure 2 The compensation assembly includes a compensation fan 501, a compensation duct 504, and a heating assembly 502. An adjustment hole 204 is provided on the support body, and an adjustment duct is provided within the support body. The adjustment duct is connected to the main valve 207 and the compensation duct 504. The main valve 207 may be a solenoid valve.

[0044] Preferably, such as Figure 5 Each support is equipped with two adjustable air ducts, one on the left and one on the right, which can be opened in sections to achieve the effect of fine-grained adjustment.

[0045] Specifically, such as Figure 2As shown, because the indoor fan is located on one side of the material chamber, the temperature on the side closer to the indoor fan 403 is higher. Due to material obstruction and airflow attenuation, uneven temperature is likely to occur at the bottom and on the side furthest from the indoor fan, leading to inconsistent material drying process and affecting product quality. Therefore, this problem can be solved by setting compensation. For example, the temperature difference range can be determined using statistical results or real-time measurements. When compensating for low-temperature areas, the main valve 207 in the compensation area is opened, the heating component 502 is activated, and under the action of the compensation fan 501, airflow with a certain temperature is blown out through the regulating hole 204 to achieve the effect of regulating the temperature of the specified area. The above compensation steps can be performed automatically according to the program settings, or the parameters can be adjusted in real time based on values ​​obtained from sensors (such as infrared thermometers).

[0046] Preferably, since the temperature of the gas blown out through the regulating hole may be higher than the material drying temperature during temperature compensation, in order to avoid the material from coming into contact with the regulating hole 204 and causing high temperature accumulation, and to avoid damage to the material, the fixed support 201 and the movable support 202 in the temperature compensation area alternately perform compensation work. That is, when the movable support 202 rises to a height higher than the fixed support 201, the main valve 207 of the support in the fixed support 201 opens, and vice versa. Example 5:

[0047] Unlike Embodiment 4, the main valves 207 on both the fixed support 201 and the movable support 202 can be opened simultaneously during temperature compensation. To address issues such as material burns caused by contact with the regulating hole 204, this embodiment includes a valve body assembly 209 within the regulating hole 204. When the valve core 210 in the valve body assembly 209 is pressurized, the valve body assembly 209 closes. Figure 7 The valve body assembly 209 includes a valve housing 211, a valve core 210, and a spring. When the valve core 210 is subjected to pressure, the regulating hole 204 is closed. The valve body assembly 209 can also be configured as a solenoid valve, which can achieve automatic control through a pressure sensor.

[0048] Example 6: Based on Example 4 or 5, such as Figure 2 The regulating air duct is equipped with a spray assembly 505, which is connected to the water tank 14. When drying different types of materials, different materials require different degrees of dryness. If drying is done in batches, the efficiency will be low. By setting up the spray assembly 505, humidity compensation can be achieved. When some materials have reached the drying requirements, and the remaining materials continue to be dried, humidity compensation is activated. The spray assembly 505 sprays water to increase the humidity of the compensating airflow. The humidity compensation airflow also avoids direct contact with the materials to prevent damage to the materials.

[0049] Example 7: Based on Example 6, a cooling component 503 is provided in the regulating air duct. A semiconductor cooling chip can be used to make the temperature adjustment of the compensating airflow more flexible. Optionally, the compensating air duct 504 is connected to the return air duct 401 and is provided with a valve assembly, which can use the exhaust airflow to be discharged in the return air duct 401 for compensation.

[0050] A drying and preservation method, based on the drying and preservation integrated machine in any of the above embodiments, in the drying mode: the indoor fan 403 is used to realize airflow circulation, the indoor heat exchanger 301 is used to adjust the temperature, when the humidity of the circulating airflow reaches the set value, the fresh air valve 13 is opened, the exhaust fan 405 is started, and the airflow is discharged after passing through the static pressure box 404.

[0051] In preservation mode: The indoor heat exchanger 301 is used to reduce temperature and adjust humidity. The humidity is adjusted by PID, the indoor temperature is accurately controlled, the dew point temperature is increased, the relative humidity is reduced, and the internal heat exchanger is used for efficient dehumidification.

[0052] Furthermore, in the drying mode, the following steps are also included: detecting the temperature in the material chamber 12, and using a compensation component to adjust the temperature for locations with uneven temperature.

[0053] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A drying and preservation integrated machine, characterized in that: It includes a material chamber (12), a return air duct (401) connected to the material chamber (12), a return air dehumidification channel (402) connected to the return air duct (401), a fresh air valve (13), an indoor fan (403), and a heat exchange assembly (30). The heat exchange assembly (30) includes an indoor heat exchanger (301) and an outdoor heat exchanger (302). The indoor heat exchanger (301) and the indoor fan (403) are installed in the return air duct (401), and the airflow circulates in the material chamber (12) and the return air duct (401). The return air dehumidification channel (402) is provided with a one-way air outlet structure, a dehumidification fan (405), and a static pressure box (404). The return air dehumidification duct (402) is oriented toward the outdoor heat exchanger (302); The material room (12) is provided with a material rack (20), which includes several layers of rack (21). Each layer of rack (21) includes at least three supports, some of which are fixed supports (201) and the rest are movable supports (202). The movable supports (202) are connected to a drive device and can move up and down relative to the fixed supports (201) so that the material can switch the support contact surface. The drying and preservation integrated machine is equipped with a compensation component, which includes a compensation fan (501), a compensation air duct (504), and a heating component (502). The support body is provided with an adjustment hole (204), and the support body is provided with an adjustment air duct. The adjustment air duct is connected to the main valve (207) and the compensation air duct (504). The compensation air duct (504) is connected to the return air duct (401). The main valve (207) on the fixed support body (201) and the movable support body (202) can be opened simultaneously or alternately. A valve body assembly (209) is provided in the regulating hole (204). The valve body assembly (209) includes a valve shell (211), a valve core (210), and a spring. When the valve core (210) is subjected to pressure, the regulating hole (204) is closed. A spray assembly (505) is provided in the regulating air duct, and the spray assembly (505) is connected to the water tank (14).

2. The drying and preservation integrated machine according to claim 1, characterized in that: A refrigeration component (503) is installed in the regulating air duct.

3. The drying and preservation integrated machine according to claim 1, characterized in that: The drying and preservation machine is also equipped with casters (11).

4. A drying and preservation method, based on the drying and preservation integrated machine according to any one of claims 1-3, characterized in that: In drying mode: the indoor fan (403) is used to achieve airflow circulation, the indoor heat exchanger (301) is used to adjust the temperature, when the humidity of the circulating air reaches the set value, the dehumidification step is started, the fresh air valve (13) is opened, the fresh air is supplied and heated by the indoor heat exchanger (301), the dehumidification fan (405) is started, and the airflow is discharged after passing through the static pressure box (404); In the preservation mode: the indoor heat exchanger (301) is used to reduce the temperature and adjust the humidity.

5. The drying and preservation method according to claim 4, characterized in that: In the drying mode, the following steps are also included: detecting the temperature in the material chamber (12), and using the compensation component to adjust the temperature for locations with uneven temperature.

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