Microwave tunnel furnace for drying dried beancurd sticks

Abstract

The utility model relates to the technical field of dried beancurd stick drying equipment, in particular to a microwave tunnel furnace for drying dried beancurd sticks. A plurality of temperature sensor bodies and humidity sensor bodies are arranged on the bottom surface of the bracket; the tunnel furnace has the beneficial effects that the microwave drying speed is high, the drying time can be greatly shortened, the production efficiency is improved, and the problem that the surface is dried first and the interior is dried later in a traditional drying mode is solved, so that the drying uniformity is ensured, a plurality of stages with different temperatures are formed in the tunnel furnace main body, and sectional drying operation is performed on dried beancurd sticks; the situation that some heat-sensitive nutritional ingredients in the dried beancurd sticks are damaged due to the fact that the dried beancurd sticks are baked at too high temperature for a long time is avoided, the drying effect is improved, moisture is extracted, and the humidity sensor body is matched for precise monitoring, so that it is guaranteed that certain humidity is kept in the tunnel furnace body, rapid evaporation of moisture on the surfaces of the dried beancurd sticks can be reduced, and the Maillard reaction occurrence probability is reduced; the color and luster of the dried beancurd sticks can be kept.

Description

Technical Field

[0001] This utility model relates to the technical field of dried bean curd drying equipment, specifically a microwave tunnel oven for drying dried bean curd. Background Technology

[0002] Tofu skin, also known as bean curd sheets or tofu skin, is a traditional soy product made from soybeans. It is produced by heating soy milk to a boil, then keeping it at a constant temperature for a period of time. The resulting thin film rises from the surface of the soy milk and is then dried using a tofu skin drying machine.

[0003] In the prior art, the dried bean curd drying equipment heats the air with an electric heating device and then uses a fan to make the hot air flow downwards, and the hot air dries the bean curd on the conveyor mechanism.

[0004] However, traditional dried bean curd drying equipment involves prolonged high-temperature drying of the bean curd, which can damage some heat-sensitive nutrients. Furthermore, existing dried bean curd drying equipment suffers from slow hot air drying speed, poor drying effect, and low efficiency. Therefore, this invention proposes a microwave tunnel oven for drying bean curd to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a microwave tunnel oven for drying dried bean curd sticks, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a microwave tunnel oven for drying dried bean curd sticks, the microwave tunnel oven for drying dried bean curd sticks includes: a conveying mechanism, the conveying mechanism is installed on the main body of the tunnel oven, a fan is provided on the side of the main body of the tunnel oven, the air extraction end of the fan is connected to the main air suction pipe, the main air suction pipe is connected to the branch air suction pipe, the branch air suction pipe is connected to the main body of the tunnel oven, and a plurality of microwave generator bodies are provided inside the main body of the tunnel oven;

[0007] The bracket has several temperature sensor bodies and humidity sensor bodies installed on its bottom surface. The bracket is connected to the telescopic end of the electric actuator.

[0008] Preferably, an electric push rod is fixedly installed on the upper surface of the tunnel furnace body, the telescopic end of the electric push rod is fixedly connected to the bracket, a limit roller is rotatably connected to the lower surface of the bracket, and several temperature sensor bodies and humidity sensor bodies are fixedly installed on the lower surface of the bracket.

[0009] Preferably, the conveying mechanism is fixedly installed inside the tunnel furnace body, and a high-temperature resistant viewing window is fixedly installed on the side of the tunnel furnace body. The high-temperature resistant viewing window has a square plate-like structure.

[0010] Preferably, a fan is fixedly installed on the side of the tunnel furnace body, a main suction pipe is fixedly installed on the exhaust end of the fan, and several branch suction pipes are fixedly connected to the main suction pipe, with the branch suction pipes communicating with the main suction pipe.

[0011] Preferably, one end of the suction pipe is fixedly installed on the main body of the tunnel furnace, the suction pipe is connected to the inner cavity of the suction head, and the suction head has a square box-shaped structure.

[0012] Preferably, an electrically controlled valve is fixedly installed on the branch suction pipe, one end of the branch suction pipe is fixedly installed on the tunnel furnace body, and several microwave generator bodies and partition plates are fixedly installed inside the tunnel furnace body. The partition plates are square plate-shaped structures.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention proposes a microwave tunnel oven for drying dried bean curd sticks. The microwave generator emits microwaves to achieve rapid heating and drying. Microwave drying is fast, which can greatly shorten the drying time and improve production efficiency. It avoids the problem of the surface drying first and the interior drying later in traditional drying methods, thus ensuring the uniformity of drying. The microwave power of several microwave generators installed in the tunnel oven is controlled and adjusted. Different microwave power settings, combined with temperature sensors, monitor the temperature and create several temperature stages within the tunnel oven. This allows for segmented drying of the bean curd sticks, preventing them from being baked at excessively high temperatures for a long time, which could damage some heat-sensitive nutrients and improve the drying effect. In addition, a humidity sensor is used to activate the fan and the main and branch suction pipes to extract moisture. The humidity sensor accurately monitors the humidity and ensures that a certain level of humidity is maintained within the tunnel oven. This reduces the rapid evaporation of moisture from the surface of the bean curd sticks, lowers the probability of Maillard reaction, and helps maintain the color of the bean curd sticks. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the device structure of this utility model;

[0016] Figure 2 This is a partial cross-sectional view of the device of this utility model;

[0017] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0018] Figure 4 This is a schematic diagram of part of the structure of the device of this utility model.

[0019] In the diagram: 1. Main body of the tunnel furnace; 2. Conveying mechanism; 3. Main body of the microwave generator; 4. Main body of the temperature sensor; 5. Main body of the humidity sensor; 6. Support; 7. Electric actuator; 8. Limiting roller; 9. Divider plate; 10. Branch suction pipe; 11. Suction head; 12. Electric control valve; 13. Main suction pipe; 14. Fan; 15. High-temperature resistant window. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Example 1

[0022] Please see Figures 1 to 4 This utility model provides a technical solution: a microwave tunnel oven for drying dried bean curd sticks, comprising: a conveying mechanism 2, which is installed on the main body 1 of the tunnel oven; a fan 14 is provided on the side of the main body 1 of the tunnel oven; the exhaust end of the fan 14 is connected to the main suction pipe 13; the main suction pipe 13 is connected to the branch suction pipe 10; the branch suction pipe 10 is connected to the main body 1 of the tunnel oven; a plurality of microwave generator bodies 3 are provided inside the main body 1 of the tunnel oven; a support 6, on the bottom surface of the support 6, a plurality of temperature sensor bodies 4 and humidity sensor bodies 5 are provided; and the support 6 is connected to the telescopic end of an electric push rod 7.

[0023] The temperature sensor body 4 involved in this utility model is a JCW6-33A platinum resistance air temperature sensor produced by Qingdao Zhiteng Microelectronics Co., Ltd., and the humidity sensor body 5 is an NH122 ambient temperature and humidity integrated sensor produced by Wuhan Zhongke Nenghui Technology Development Co., Ltd.

[0024] In practical use, the temperature sensor body 4, which is fixedly installed on each bracket 6, monitors the temperature inside the tunnel oven body 1. It controls and adjusts the microwave power of the microwave generator bodies 3 installed inside the tunnel oven body 1. By setting different microwave powers and monitoring the temperature with the temperature sensor body 4, and adjusting the microwave power of the microwave generator bodies 3, several temperature stages can be created inside the tunnel oven body 1. This allows for segmented drying of the dried bean curd sticks, preventing them from being baked at excessively high temperatures for extended periods, which could damage some heat-sensitive nutrients and improve the drying effect. Furthermore, by cooperating with the humidity sensor body 5 and starting the fan 14 in conjunction with the main suction pipe 1... 3 and the suction pipe 10 extract moisture, and together with the humidity sensor body 5 for precise monitoring, ensure that a certain humidity is maintained inside the tunnel oven body 1. This can reduce the rapid evaporation of moisture on the surface of the bean curd sticks, reduce the probability of Maillard reaction, and help maintain the color of the bean curd sticks. The microwave generator body 3 emits microwaves, and the microwaves interact with the water molecules in the material, causing the water molecules to generate high-frequency vibration and friction in the microwave field, thereby converting microwave energy into heat energy to achieve rapid heating and drying. Microwave drying is fast, which can greatly shorten the drying time, improve production efficiency, and dry more evenly. It avoids the problem of the surface drying first and the inside drying later in the traditional drying method, thus ensuring the uniformity of drying.

[0025] Example 2

[0026] Based on Example 1, a tunnel oven body 1 is provided to improve the drying effect of dried bean curd sticks. An electric push rod 7 is fixedly installed on the upper surface of the tunnel oven body 1. The telescopic end of the electric push rod 7 is fixedly connected to the support 6. A limiting roller 8 is rotatably connected to the lower surface of the support 6. Several temperature sensor bodies 4 and humidity sensor bodies 5 are fixedly installed on the lower surface of the support 6. When the electric push rod 7 is activated, it pushes the support 6 to move downward, so that the temperature sensor bodies 4, the limiting roller 8 and the humidity sensor bodies 5 fixedly installed on the support 6 can be as close as possible to the dried bean curd sticks on the conveying mechanism 2. This can improve the detection effect of the temperature sensor bodies 4 and the humidity sensor bodies 5, and the measurement accuracy is high. When the dried bean curd sticks on the conveying mechanism 2 are lifted, the limiting roller 8 can limit the dried bean curd sticks to prevent them from being lifted too high, thereby improving the quality of the dried bean curd sticks produced.

[0027] A blower 14 is fixedly installed on the side of the tunnel furnace body 1. A main suction pipe 13 is fixedly installed on the suction end of the blower 14. Several branch suction pipes 10 are fixedly connected to the main suction pipe 13. The branch suction pipes 10 are connected to the main suction pipe 13. When the blower 14 is started, it can absorb the air in the branch suction pipes 10 through the main suction pipe 13.

[0028] One end of the suction pipe 10 is fixedly installed on the tunnel oven body 1. The suction pipe 10 is connected to the inner cavity of the suction head 11. The suction head 11 has a square box-shaped structure. With the suction head 11 fixedly connected to the suction pipe 10, air can be drawn from the tunnel oven body 1, and moisture can be extracted from the tunnel oven body 1. With the humidity sensor body 5, the humidity sensor body 5 utilizes the sensitivity of the humidity-sensitive material to the ambient humidity. When the ambient humidity changes, the physical or chemical properties of the humidity-sensitive material will change accordingly, such as changes in parameters such as resistance, capacitance, and frequency. The sensor detects these changes in parameters and converts them into electrical signals, thereby realizing the measurement and monitoring of the ambient humidity. With the opening and closing of the electric control valve 12 on the suction pipe 10, air can be drawn from different sections of the tunnel oven body 1. Different sections can be drawn. With the monitoring of the humidity sensor body 5, maintaining a certain humidity can reduce the rapid evaporation of moisture on the surface of the bean curd sticks, reduce the probability of Maillard reaction, help maintain the color of the bean curd sticks, and improve the drying effect.

[0029] Example 3

[0030] Based on Embodiment 2, a suction pipe 10 is provided to improve the device's performance. An electrically controlled valve 12 is fixedly installed on the suction pipe 10. One end of the suction pipe 10 is fixedly installed on the tunnel oven body 1. Several microwave generator bodies 3 and partition plates 9 are fixedly installed inside the tunnel oven body 1. The partition plates 9 have a square plate structure and divide the upper part of the tunnel oven body 1 into several small chambers, as shown in the example... Figure 2 As shown, each small chamber is equipped with an electric push rod 7 and several microwave generator bodies 3. The microwave power of the microwave generator bodies 3 in each chamber is controlled to ensure that the microwave power of the microwave generator bodies 3 in each chamber is different, so as to realize segmented drying operation. Different microwave power is set according to different drying stages of the bean curd. The resistance value of the metal or semiconductor material on the temperature sensor body 4 changes with temperature. When the air temperature changes, the resistance value of the resistive material in the sensor changes accordingly. By measuring the change of resistance value and converting it into an electrical signal, the change of air temperature can be accurately reflected for temperature monitoring, controlling and adjusting the microwave power of the microwave generator body 3, and cooperating with the air intake pipe 10 to draw air, ensuring that the temperature of each segment in the tunnel oven body 1 is constant, realizing precise temperature control, adapting to the drying operation of bean curd at different stages, and avoiding the destruction of heat-sensitive nutrients caused by the high drying temperature of bean curd at different stages.

[0031] The conveying mechanism 2 is fixedly installed inside the tunnel furnace body 1. A high-temperature resistant viewing window 15 is fixedly installed on the side of the tunnel furnace body 1. The high-temperature resistant viewing window 15 has a square plate structure. By setting the high-temperature resistant viewing window 15, it is convenient for personnel to observe the tunnel furnace body 1 and to observe and adjust the height of the support 6.

[0032] Working Principle: In actual use, the microwave generator body 3 emits microwaves to achieve rapid heating and drying. Microwave drying is fast, which can greatly shorten the drying time, improve production efficiency, and avoid the problem of the surface drying first and the interior drying later in the traditional drying method, thus ensuring the uniformity of drying. The microwave power of several microwave generator bodies 3 set in the tunnel oven body 1 is controlled and adjusted. Different microwave power settings are used in conjunction with the temperature sensor body 4 to monitor the temperature and adjust the microwave power of the microwave generator bodies 3 to form several temperature stages in the tunnel oven body 1, so as to carry out segmented drying operation of the bean curd sticks. This avoids the bean curd sticks being baked at excessively high temperatures for a long time, which would damage some heat-sensitive nutrients in the bean curd sticks and improve the drying effect. In addition, in conjunction with the humidity sensor body 5, the fan 14 is started to extract moisture in conjunction with the main suction pipe 13 and the branch suction pipe 10. With the precise monitoring of the humidity sensor body 5, it is ensured that a certain humidity is maintained in the tunnel oven body 1, which can reduce the rapid evaporation of moisture on the surface of the bean curd sticks, reduce the probability of Maillard reaction, and help maintain the color of the bean curd sticks.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A microwave tunnel oven for drying dried bean curd sticks, characterized in that: The microwave tunnel oven for drying dried bean curd includes: a conveying mechanism (2), which is installed on the main body (1) of the tunnel oven. A fan (14) is provided on the side of the main body (1). The exhaust end of the fan (14) is connected to the main suction pipe (13). The main suction pipe (13) is connected to the branch suction pipe (10). The branch suction pipe (10) is connected to the main body (1) of the tunnel oven. Several microwave generator bodies (3) are provided inside the main body (1). The bracket (6) has several temperature sensor bodies (4) and humidity sensor bodies (5) on its bottom surface. The bracket (6) is connected to the telescopic end of the electric push rod (7).

2. The microwave tunnel oven for drying dried bean curd sticks according to claim 1, characterized in that: An electric push rod (7) is fixedly installed on the upper inner surface of the tunnel furnace body (1). The telescopic end of the electric push rod (7) is fixedly connected to the bracket (6). A limit roller (8) is rotatably connected to the lower surface of the bracket (6). Several temperature sensor bodies (4) and humidity sensor bodies (5) are fixedly installed on the lower surface of the bracket (6).

3. The microwave tunnel oven for drying dried bean curd sticks according to claim 1, characterized in that: The conveying mechanism (2) is fixedly installed inside the tunnel furnace body (1). A high-temperature resistant window (15) is fixedly installed on the side of the tunnel furnace body (1). The high-temperature resistant window (15) has a square plate structure.

4. A microwave tunnel oven for drying dried bean curd sticks according to claim 1, characterized in that: A fan (14) is fixedly installed on the side of the main body (1) of the tunnel furnace. A main suction pipe (13) is fixedly installed on the suction end of the fan (14). Several branch suction pipes (10) are fixedly connected to the main suction pipe (13). The branch suction pipes (10) are connected to the main suction pipe (13).

5. A microwave tunnel oven for drying dried bean curd sticks according to claim 1, characterized in that: One end of the branch suction pipe (10) is fixedly installed on the main body (1) of the tunnel furnace. The branch suction pipe (10) is connected to the inner cavity of the suction head (11). The suction head (11) has a square box-shaped structure.

6. A microwave tunnel oven for drying dried bean curd sticks according to claim 1, characterized in that: An electric control valve (12) is fixedly installed on the branch suction pipe (10). One end of the branch suction pipe (10) is fixedly installed on the tunnel furnace body (1). Several microwave generator bodies (3) and partition plates (9) are fixedly installed inside the tunnel furnace body (1). The partition plates (9) are square plate structures.

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