Infrared and pulse microwave vacuum drying device

Abstract

The utility model relates to the technical field of microwave infrared collaborative drying, and discloses an infrared and pulse microwave vacuum drying device which comprises a resonant cavity, the inner wall of the top end of the resonant cavity is fixedly connected with a vacuum assembly used for air exhaust, the inner wall of the left side of the resonant cavity is fixedly connected with a first microwave source, and the inner wall of the right side of the resonant cavity is fixedly connected with a second microwave source. A second microwave source is fixedly connected to the inner wall of the right side of the resonant cavity, a vacuum bin is fixedly connected to the bottom end of the inner wall of the resonant cavity, a heating bin is formed in the vacuum bin, a first tray is fixedly connected to the upper portion of the inner wall of the heating bin, and a second tray is fixedly connected to the lower portion of the inner wall of the heating bin. According to the utility model, under the combined action of microwave and infrared heating, the material I and the material II overcome the limitation of independent action of microwave and infrared heating, realize advantage complementation of the heating mode, and simultaneously realize the advantages of no need of drying medium, good heat efficiency, less heat loss, strong penetrating power, obvious internal heating, high drying later-stage efficiency and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of microwave infrared coordinated drying, in particular to an infrared and pulse microwave vacuum drying device. Background Art

[0002] Agricultural products have high moisture content after harvest. The moisture content of some fruit and vegetable products can reach more than 90% after harvest, which is not conducive to storage. Drying, as a way to reduce moisture content, can effectively reduce the impact of microorganisms, extend the storage period, and facilitate storage and transportation. It is widely used in the field of agricultural product storage and processing. Common drying methods include hot air drying, infrared drying, vacuum drying, microwave drying, etc. Among them, microwave drying has the advantages of precision and high efficiency, volume heating, and strong penetration.

[0003] In the prior art, infrared drying and microwave drying of some drying devices belong to radiation drying, which do not require drying media, have good thermal efficiency and less heat loss. However, they have problems such as weak penetration, unclear internal heating and low efficiency in the later stage of drying. Therefore, an infrared and pulse microwave vacuum drying device is proposed to solve the above problems. Summary of the invention

[0004] In order to make up for the above shortcomings, the utility model provides an infrared and pulse microwave vacuum drying device, which aims to improve the infrared drying and microwave drying of some drying devices in the prior art. They are both radiation drying, do not require drying medium, have good thermal efficiency and less heat loss, but have weak penetration, unclear internal heating and low efficiency in the later stage of drying.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An infrared and pulse microwave vacuum drying device, comprising a resonant cavity, a vacuum component for exhausting air is fixedly connected to the top inner wall of the resonant cavity, a microwave source 1 is fixedly connected to the left inner wall of the resonant cavity, a microwave source 2 is fixedly connected to the right inner wall of the resonant cavity, a vacuum chamber is fixedly connected to the bottom end of the inner wall of the resonant cavity, a heating chamber is provided inside the vacuum chamber, a tray 1 is fixedly connected to the upper part of the inner wall of the heating chamber, a tray 2 is fixedly connected to the lower part of the inner wall of the heating chamber, a control module for controlling switches of each unit is fixedly connected to the top middle parts of the tray 1 and the tray 2, a plurality of binding posts are fixedly connected to the left and right inner walls of the vacuum chamber, an insulating terminal is fixedly connected to the outer side walls of the binding posts, a reflector is fixedly connected to the upper and lower ends of the inner wall of the heating chamber, an exhaust port is provided in the middle of the top reflector, a heating pipe is fixedly connected to the adjacent sides of the two binding posts, and a microwave shielding device is fixedly connected to the upper and lower ends of the inner wall of the heating chamber;

[0007] As a further description of the above technical solution:

[0008] The vacuum assembly includes a vacuum pump and a vacuum tube, and the bottom end of the vacuum tube is externally fixedly connected to the top inner wall of the resonant cavity;

[0009] As a further description of the above technical solution:

[0010] The control module includes a microwave control unit, an infrared control unit, a vacuum control unit, a temperature sensor 1, a plurality of material 1s, a temperature sensor 2, a plurality of material 2s, the bottom end of the temperature sensor 1 is fixedly connected to the top end of the tray 1, the bottom end of the material 1 is in contact with the top end of the tray 1, the bottom end of the temperature sensor 2 is fixedly connected to the top end of the tray 2, and the bottom end of the material 2 is in contact with the top end of the tray 2;

[0011] As a further description of the above technical solution:

[0012] One end of the vacuum tube is externally fixedly connected to the upper side of the vacuum pump, and the other end of the vacuum tube is externally connected to the inner wall of the vacuum chamber and the reflector through the air extraction port;

[0013] As a further description of the above technical solution:

[0014] The inner wall of the resonance cavity is fixedly connected with a heat preservation layer, and the temperature sensor 1 and the temperature sensor 2 are contact type, and are placed in the vacuum bin to contact the material 1 and the material 2 respectively.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the utility model, under the combined action of microwave and infrared heating, material one and material two overcome the limitations of microwave and infrared heating alone, realize the complementary advantages of heating methods, and at the same time realize the advantages of no need for drying medium, good thermal efficiency, less heat loss, strong penetration, obvious internal heating, and high efficiency in the later stage of drying.

[0017] 2. In the utility model, tray 1 and tray 2 and materials 1 and 2 therein are dried and dehydrated under the synergistic effect of infrared and microwave, thereby alleviating the unevenness of microwave drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional schematic diagram of an infrared and pulse microwave vacuum drying device proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a vacuum chamber of an infrared and pulse microwave vacuum drying device proposed by the utility model;

[0020] Figure 3This is a schematic diagram of the structure of an air extraction port of an infrared and pulse microwave vacuum drying device proposed by the utility model;

[0021] Figure 4 The utility model discloses a heating tube structure diagram of an infrared and pulse microwave vacuum drying device.

[0022] Legend:

[0023] 1. Vacuum pump; 2. Vacuum tube; 3. Resonant cavity; 4. Microwave source 1; 5. Microwave source 2; 6. Vacuum chamber; 7. Heating chamber; 8. Tray 1; 9. Tray 2; 10. Temperature sensor 1; 11. Material 1; 12. Temperature sensor 2; 13. Material 2; 14. Terminal block; 15. Insulating terminal; 16. Reflector; 17. Exhaust port; 18. Heating tube; 19. Microwave shielding device. DETAILED DESCRIPTION

[0024] 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.

[0025] Reference Figure 1-Figure 3 , the utility model provides an embodiment: an infrared and pulse microwave vacuum drying device, comprising a resonant cavity 3, wherein the resonant cavity 3 is made of metal and is provided with a microwave feeding port, the inner wall of the resonant cavity 3 is fixedly connected with a heat preservation layer, the heat preservation layer here is used to enhance the heat gathering effect and improve the drying efficiency, the top inner wall of the resonant cavity 3 is fixedly connected with a vacuum component for exhausting air, the vacuum component comprises a vacuum pump 1 and a vacuum tube 2, the bottom end of the vacuum tube 2 is externally fixedly connected to the top inner wall of the resonant cavity 3, one end of the vacuum tube 2 is externally fixedly connected to the upper side of the vacuum pump 1, the vacuum pump 1 is an oil-sealed pump, the left inner wall of the resonant cavity 3 is fixedly connected with a microwave source 1 4, the right inner wall of the resonant cavity 3 is fixedly connected with a microwave source 2 5, the bottom end of the inner wall of the resonant cavity 3 is fixedly connected with a vacuum chamber 6, because the vacuum chamber 6 is made of ceramic or high-boron quartz, it can isolate the charged conductor from other parts of the device and play a protective role;

[0026] One end of the vacuum tube 2 is externally fixedly connected to the upper side of the vacuum chamber 6, and a heating chamber 7 is provided inside the vacuum chamber 6. The heating chamber 7 here is used to heat the upper part of the inner wall of the heating chamber 7, and a tray 1 8 is fixedly connected to the upper part of the inner wall of the heating chamber 7, and a tray 2 9 is fixedly connected to the lower part of the inner wall of the heating chamber 7. The middle part of the top of the tray 1 8 and the tray 2 9 is fixedly connected with a control module for controlling the switches of each unit. The control module includes a microwave control unit, an infrared control unit, a vacuum control unit, a temperature sensor 10, a plurality of materials 11, a temperature sensor 2 12, and a plurality of materials 2 13. The bottom end of the temperature sensor 10 is fixedly connected to the top of the tray 1 8, the bottom end of the material 11 is in contact with the top of the tray 1 8, the bottom end of the temperature sensor 2 12 is fixedly connected to the top of the tray 2 9, and the material 2 13 The bottom of the tray 9 contacts the top of the tray 9, and the temperature sensor 10 and the temperature sensor 2 12 are contact type, placed in the vacuum chamber 6 and contacted with the material 11 and the material 2 13 respectively, to realize the real-time monitoring of the temperature in the chamber. The control module here can realize the free joint operation of the microwave source 1 4 and the microwave source 2 5, the heating tube 18 and the heating chamber 7, to ensure the continuous operation of the infrared and the intermittent operation of the microwave, and to ensure the intermittent operation of the microwave by controlling the start and stop of the microwave source 1 4 and the microwave source 2 5, and can control the microwave source 1 4 and the microwave source 2 5 to work for a specific time at different powers, and can realize the separate control of multiple microwave sources 1 4 and microwave sources 2 5, and the temperature sensor 1 10 and the temperature sensor 2 12 are respectively installed above the tray 1 8 and the tray 2 9 and contact the materials. At the same time, the temperature sensor 1 10 and the temperature sensor 2 12 are connected to the control system to monitor the temperature of the material 1 11 and the material 2 13 in real time to avoid overheating or overcooling.

[0027] Reference Figure 3-Figure 4 , the inner walls of the left and right sides of the vacuum bin 6 are fixedly connected with a plurality of terminals 14, the outer walls of the terminals 14 are fixedly connected with insulating terminals 15, the upper and lower ends of the inner wall of the heating bin 7 are fixedly connected with reflective plates 16, and a suction port 17 is provided in the middle of the top reflective plate 16. The suction port 17, the vacuum tube 2, the vacuum pump 1, and the vacuum bin 6 here jointly create a vacuum environment in the bin to facilitate microwave penetration for drying. The other end of the vacuum tube 2 is connected to the inner wall of the vacuum bin 6 and the reflective plate 16 through the suction port 17, and the heating tube 18 is fixedly connected to the adjacent side of the two terminals 14. The upper and lower ends of the inner wall of the heating bin 7 are fixedly connected with a microwave shielding device 19, the heating tube 18 here is connected to the power supply through the terminal 14, and the microwave shielding device 19 is arranged below the terminal 14 (taking the upper terminal 14 as an example). When the heating tube 18 is working, the reflective plate 16 reflects infrared radiation, so that the heat is radiated downward to the material 11 and the material 2 13, thereby reducing energy loss and improving infrared radiation utilization.

[0028] Working principle: before the drying process begins, open the material bin door and place material 11 and material 2 13 in tray 1 8 and tray 2 9, power on the whole equipment, and evacuate the air inside the vacuum bin 6 from the vacuum port 17 along the vacuum tube 2 through the vacuum pump 1, so that the bin is in a high vacuum state. The required drying temperature range (including upper limit temperature, middle limit temperature, lower limit temperature, etc.), infrared safety temperature, power of microwave source 1 4 and microwave source 2 5, drying time and microwave intermittent time during the drying process are set through an external computer. Then the drying operation is carried out. The microwave source 1 4 and microwave source 2 5 on both sides of the resonant cavity 3 emit corresponding intermittent microwaves under the control of the control module and pass through the vacuum bin 6. At the same time, the heating tube 18 continuously releases a large amount of heat to the inside of the heating bin 7 under the control of the infrared control unit to increase the ambient temperature. The two jointly act on the materials 11 and 13 through the tray 1 8 and tray 2 9 in the bin, realizing rapid and uniform dehydration of them, thereby achieving the drying effect.

[0029] At the same time, the temperature sensor 10 and the temperature sensor 2 12 here can monitor the temperature of the material 11 and the material 2 13 to ensure that the temperature is moderate. When the heating tube 18 is working, the reflector 16 reflects the infrared radiation, so that the heat is radiated downward to the material 11 and the material 2 13, reducing energy loss and improving the utilization rate of infrared radiation. After the drying operation is completed, the device automatically stops working, opens the silo door, takes out the material 11 and the material 2 13, and cleans the tray 1 8 and the tray 2 9.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An infrared and pulse microwave vacuum drying device, comprising a resonant cavity (3), characterized in that: A vacuum component for exhausting air is fixedly connected to the top inner wall of the resonant cavity (3); a microwave source 1 (4) is fixedly connected to the left inner wall of the resonant cavity (3); a microwave source 2 (5) is fixedly connected to the right inner wall of the resonant cavity (3); a vacuum chamber (6) is fixedly connected to the bottom end of the inner wall of the resonant cavity (3); a heating chamber (7) is provided inside the vacuum chamber (6); a tray 1 (8) is fixedly connected to the upper part of the inner wall of the heating chamber (7); a tray 2 (9) is fixedly connected to the lower part of the inner wall of the heating chamber (7); the tray 1 (8) and the top end of the tray 2 (9) are fixedly connected to each other. A control module for controlling the switches of each unit is fixedly connected in the middle, a plurality of terminal posts (14) are fixedly connected to the inner walls on the left and right sides of the vacuum chamber (6), an insulating terminal (15) is fixedly connected to the outer walls of the terminal posts (14), a reflecting plate (16) is fixedly connected to the upper and lower ends of the inner wall of the heating chamber (7), an air extraction port (17) is provided in the middle of the top of the reflecting plate (16), a heating tube (18) is fixedly connected to the adjacent sides of the two terminal posts (14), and a microwave shielding device (19) is fixedly connected to the upper and lower ends of the inner wall of the heating chamber (7).

2. The infrared and pulse microwave vacuum drying device according to claim 1, characterized in that: The vacuum component comprises a vacuum pump (1) and a vacuum tube (2), wherein the bottom end of the vacuum tube (2) is externally fixedly connected to the top inner wall of the resonance cavity (3).

3. The infrared and pulse microwave vacuum drying device according to claim 1, characterized in that: The control module comprises a microwave control unit, an infrared control unit, a vacuum control unit, a temperature sensor 1 (10), a plurality of material 1s (11), a temperature sensor 2 (12), and a plurality of material 2s (13), wherein the bottom end of the temperature sensor 1 (10) is fixedly connected to the top end of the tray 1 (8), the bottom end of the material 1 (11) is in contact with the top end of the tray 1 (8), the bottom end of the temperature sensor 2 (12) is fixedly connected to the top end of the tray 2 (9), and the bottom end of the material 2 (13) is in contact with the top end of the tray 2 (9).

4. The infrared and pulse microwave vacuum drying device according to claim 2, characterized in that: One end of the vacuum tube (2) is externally fixedly connected to the upper side of the vacuum pump (1), and the other end of the vacuum tube (2) is externally connected to the inner wall of the vacuum chamber (6) and the reflection plate (16) through the air extraction port (17).

5. The infrared and pulse microwave vacuum drying device according to claim 3, characterized in that: The inner wall of the resonance cavity (3) is fixedly connected with a heat-insulating layer, and the temperature sensor 1 (10) and the temperature sensor 2 (12) are of contact type and are placed in the vacuum chamber (6) to contact the material 1 (11) and the material 2 (13) respectively.

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