CN215766105U

CN215766105U - Microwave drying device

Info

Publication number: CN215766105U
Application number: CN202121406150.4U
Authority: CN
Inventors: 李霄; 罗中兴; 李藐; 张开; 左莉; 邓云跃; 冯国通; 孙昭
Original assignee: Qingdao Makewave Microwave Innovation Technology Co ltd; Institute Of Nuclear Technology Rocket Army Research Institute Pla
Current assignee: Pla 96901
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-02-08
Anticipated expiration: 2031-06-23

Abstract

The utility model discloses a microwave drying device which comprises a box body (10), a microwave generator (20) positioned on the box body (10), an air inlet (12), an air inducing air channel (70), a sample container (30) positioned in the box body (10) and a hot air channel (13) positioned on the outer wall of the box body (10), wherein two ends of the hot air channel (13) are communicated with the inside of the box body (10), a first fan (80) is arranged in the air inducing air channel (70), an electric heater (100) and a second fan (110) are arranged in the hot air channel (13), and the second fan (110) can introduce air in the box body (10) into the hot air channel (13), heat the air by the electric heater (100) and then return to the box body (10) again. According to the utility model, the hot air duct is additionally arranged on the outer wall of the box body, so that air in the box body is pumped out and heated and then is sent back, the temperature in the box body is raised, and the drying speed is further accelerated.

Description

Microwave drying device

Technical Field

The present invention relates to a drying apparatus, and more particularly, to a microwave drying apparatus.

Background

The microwave is a high frequency electromagnetic wave with a frequency of 300 MHz to 30 MHz and a wavelength of 1 mm to 1 m. The microwave has the characteristics of short oscillation period, strong penetrating power, specific effect generated by interaction with substances and the like which are unique to an electric field.

Traditional drying methods, such as flame, hot air, steam, electric heating and the like, are external heating and drying, and after the surface of the material absorbs heat, the heat permeates into the material through heat conduction, and then the material is heated and dried. Microwave drying, which is a totally different method of internal heating. The wet material is in a microwave high-frequency electric field with extremely short oscillation period, water molecules in the wet material are polarized and are regularly arranged along the direction of the microwave electric field, then the wet material rapidly rotates along with the interactive change of the direction of the high-frequency alternating electric field, and violent collision and friction (hundreds of millions of times per second) are generated, so that a part of microwave energy is converted into molecular motion energy and is expressed in the form of heat, the temperature of water is increased to leave the material, and the material is dried. That is, after the microwaves enter the material and are absorbed, their energy is converted into heat energy inside the dielectric of the material. Therefore, the microwave drying is a drying mode which uses electromagnetic waves as a heating source and the dried material is a heating body.

The Chinese patent application with publication number CN101865597A discloses a commonly used microwave drying device, which mainly comprises a box body, a microwave generator, a control main board, a fan, an air inlet, a humidity probe, a temperature probe, a control panel, a clothes hanger and a water receiving disc, wherein the box body is made of stainless steel, a top plate is made of stainless steel mesh, a flow guide cover is arranged on the top plate, and an exhaust fan is arranged on the flow guide cover. However, the microwave dryer is increasingly unable to meet the requirement of more efficient drying.

SUMMERY OF THE UTILITY MODEL

In order to meet the requirement of high efficiency, the utility model provides a microwave drying device which effectively combines microwave heating and electric heating by additionally arranging a hot air circulating system to achieve the aim of improving the drying efficiency.

In order to achieve the purpose, the utility model provides a microwave drying device which comprises a box body, a microwave generator, an air inlet, an air inducing duct, a sample container and a hot air duct, wherein the microwave generator, the air inlet and the air inducing duct are positioned on the box body, the sample container is positioned in the box body, the hot air duct is positioned on the outer wall of the box body, two ends of the hot air duct are communicated with the interior of the box body, a first fan is arranged in the air inducing duct, an electric heater and a second fan are arranged in the hot air duct, and the second fan can introduce air in the box body into the hot air duct, heat the air by the electric heater and then return the air to the box body again.

Preferably, the hot air duct spirally surrounds the outer wall of the box body.

Preferably, the electric heater is located at an air inlet of the hot air duct.

Further, the air outlet of the hot air duct is aligned with the upper part of the sample container.

Preferably, the bottom of the sample container is provided with an auxiliary heating element.

Further, the auxiliary heating member is an electric heating wire.

Preferably, a humidity sensor is arranged in the induced air duct, and a temperature sensor is arranged in the box body.

Preferably, the bottom of the sample container is provided with a load cell.

Through the technical scheme, the utility model has the following beneficial effects:

1. according to the utility model, the hot air duct is additionally arranged on the outer wall of the box body, air in the box body is pumped out and heated and then is sent back, the temperature in the box body is raised, the drying speed is further increased, and the drying effect is improved.

2. In a preferred technical scheme of the utility model, the hot air duct spirally surrounds the outer wall of the box body, so that the hot air duct with enough length can be placed on the outer wall of the box body with limited area, and the heat of the hot air duct is utilized to insulate the box body, so that the air in the box body is at higher temperature, and the drying speed is accelerated.

3. In another preferred technical scheme of the utility model, the auxiliary heating element is arranged at the bottom of the sample container and can heat the bottom of the sample, so that the bottom of the sample is heated by the auxiliary heating element, the surface of the sample is heated by hot air, the interior of the sample is heated by microwaves, the sample is heated and dried in all directions, and the drying effect is obviously improved.

4. According to the utility model, the drying degree of the sample is quantitatively estimated by using the temperature sensor, the humidity sensor, the weighing sensor and the like, so that the processing efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of fig. 1.

Description of the reference numerals

1 microwave drying device, 10 box body, 11 top plate, 12 air inlet and 13 hot air duct

20 microwave generator

30 sample container

40 auxiliary heating member

50 weighing sensor

60 temperature sensor

70 induced air duct

80 first fan

90 humidity sensor

100 electric heater

110 second fan

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

It should be noted that, in the following description, directional words such as "outside" and "inside" are used for clarity of the technical solution of the present invention, and all the directional words have meanings according to the directional terms of the parts of the microwave heating device, for example, a portion through which air passes is inside, and a portion opposite to the portion through which air passes is outside. This is done solely for the purpose of facilitating the description of the utility model and simplifying the description, and is not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operated, and therefore should not be taken as limiting the utility model.

Furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, and therefore the features defined "first", "second" may explicitly or implicitly include one or more of the features described.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1-2, a microwave drying device 1 of the present invention includes a box 10, a microwave generator 20 located on the box 10, an air inlet 12 and an air guiding duct 70, a sample container 30 located in the box 10, and a hot air duct 13 located on an outer wall of the box 10, wherein two ends of the hot air duct 13 are communicated with an inside of the box 10, a first fan 80 is disposed in the air guiding duct 70, an electric heater 100 and a second fan 110 are disposed in the hot air duct 13, and the second fan 110 can introduce air in the box 10 into the hot air duct 13, heat the air by the electric heater 100, and then return the air to the box 10. The microwave generator 20 may employ an R & S/rod and schwarz brand SMB100A microwave signal generator. The electric heater 100 preferably employs a heating wire heater to facilitate the passage of air. The intake ports 12 are preferably plural in order to uniformly intake air.

In the present invention, the microwave generator 20 is used for emitting microwaves into the box body 10 to dry the articles placed on the sample container 30, and the second fan 110 in the hot air duct 13 sucks the air in the box body 10 into the hot air duct 13, heats the air by the electric heater 100, and then sends the air back into the box body 10, so that the temperature of the air in the box body 10 is in a high state, and the drying speed is accelerated.

The humid air in the cabinet 10 is rapidly drawn out from the induction duct 70 by the first fan 80.

In a preferred embodiment of the present invention, the hot air duct 13 is spirally wound around the outer wall of the box 10, i.e. the air inlet and the air outlet of the hot air duct 13 are at different horizontal positions. Like this, on the one hand, on the limited box 10 outer wall of area, can place the hot-blast wind channel 13 of sufficient length, utilize the heat in hot-blast wind channel 13 to keep warm to box 10 for the air in box 10 is in higher temperature, in order to accelerate drying rate, and on the other hand, the position of the income wind gap and the air outlet of hot-blast wind channel 13 staggers, makes the income wind gap income wind and the air-out of air outlet can not mutual interference, makes the air that gets into hot-blast wind channel 13 be the air of temperature relatively lower. In this case, the electric heater 100 is located at an air inlet of the hot air duct 13. It is further preferable that the air inlet of the hot air duct 13 is located at the upper portion of the box 10, and the air outlet is located at the lower portion of the box 10 and is preferably aligned with the sample container 30, so that the hot air can be in closest contact with the sample on the sample container 30, the sample is ensured to be in contact with the hot air with the maximum heat, and the drying effect is further improved.

On the basis of the above technical solution, in order to further improve the drying effect, the bottom of the sample container 30 is provided with an auxiliary heating element 40. The auxiliary heating member 40 is preferably a heating wire, which heats the bottom of the sample. Under this kind of condition, the sample bottom is heated by auxiliary heating member 40, and the sample surface is heated by hot-air, and the sample is inside by microwave heating, carries out all-round heating drying to the sample, and drying effect is showing and is promoting.

For the accurate sample drying degree of holding, be equipped with humidity transducer 90 in induced air wind channel 70, be equipped with temperature sensor 60 in the box 10, humidity transducer 90 is used for monitoring the humidity of hydrofuge air, and temperature transducer 60 is used for the temperature in the monitoring devices, can carry out quantitative estimation to sample drying degree, has improved sample treatment efficiency greatly. Humidity sensor 90 may be an HDC1080DMBR type humidity sensor available from TI, and temperature sensor 60 may be an SHT20 type humidity sensor available from SENSITION.

In addition, a weighing sensor 50 may be disposed at the bottom of the sample container 30, and the weighing sensor 50 weighs the sample on the sample container to determine whether the sample is completely dried, thereby improving the processing efficiency. The retransmission sensor 50 may be a wacker weighing cell of type F4802.

As can be seen from the above description, the present invention has the following advantages: according to the utility model, the hot air duct 13 is additionally arranged on the outer wall of the box body 10, and air in the box body 10 is pumped out and heated and then is sent back to the box body 10, so that the temperature of the air in the box body 10 is raised, the drying speed is further increased, and the drying effect is improved; the hot air duct 13 spirally surrounds the outer wall of the box body 10, so that the hot air duct 13 with a sufficient length can be placed on the outer wall of the box body 10 with a limited area, and heat of the hot air duct 13 is utilized to keep the temperature of the box body 10, so that the air in the box body 10 is at a high temperature, and the drying speed is accelerated. The bottom of sample container 30 is equipped with auxiliary heating member 40, can heat the sample bottom, and like this, the sample bottom is heated by auxiliary heating member 40, and the sample surface is by hot-blast heating, and the sample is inside by microwave heating, carries out all-round heating drying to the sample, and drying effect is showing and is promoting. According to the utility model, the drying degree of the sample is quantitatively estimated by using the temperature sensor 60, the humidity sensor 90, the weighing sensor 50 and the like, so that the processing efficiency is improved.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the utility model is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. The microwave drying device is characterized by comprising a box body (10), a microwave generator (20) arranged on the box body (10), an air inlet (12), an air inducing air channel (70), a sample container (30) arranged in the box body (10) and a hot air channel (13) arranged on the outer wall of the box body (10), wherein two ends of the hot air channel (13) are communicated with the inside of the box body (10), a first fan (80) is arranged in the air inducing air channel (70), an electric heater (100) and a second fan (110) are arranged in the hot air channel (13), and the second fan (110) can introduce air in the box body (10) into the hot air channel (13), heat the air by the electric heater (100) and then return to the box body (10) again.

2. Microwave drying unit according to claim 1, characterised in that the hot air duct (13) is helically wound around the outer wall of the cabinet (10).

3. Microwave drying unit according to claim 2, wherein the electric heater (100) is located at the inlet of the hot air duct (13).

4. Microwave drying device according to claim 2, characterized in that the air outlet of the hot air duct (13) is aligned with the upper part of the sample container (30).

5. Microwave drying unit according to any of claims 1 to 4, characterised in that the bottom of the sample container (30) is provided with an auxiliary heating element (40).

6. Microwave drying device according to claim 5, characterised in that the auxiliary heating element (40) is a heating wire.

7. Microwave drying unit according to any of claims 1 to 4, characterised in that a humidity sensor (90) is provided in the induced air duct (70) and a temperature sensor (60) is provided in the cabinet (10).

8. Microwave drying unit according to any of claims 1 to 4, characterized in that the bottom of the sample container (30) is provided with a load cell (50).