Microwave tunnel furnace

Abstract

The utility model relates to the technical field of microwave heating, in particular to a microwave tunnel furnace. The utility model provides a microwave tunnel furnace which comprises a microwave tunnel and a plurality of hot air pipes, the hot air pipes are arranged at one end of the microwave tunnel and penetrate through the microwave tunnel, a plurality of ventilation holes are formed in the surfaces of the hot air pipes side by side, the hot air pipes are used for uniformizing the temperature in the tunnel, and the microwave tunnel comprises a plurality of magnetic control assemblies. The magnetic control assembly comprises first fans and temperature control equipment, the temperature control equipment can respond according to the current temperature in the tunnel so as to control the output power of the first fan on one side, and the distance between magnetic sheets in the temperature control equipment can be adjusted so as to control the output temperature. And the magnetic control assemblies are arranged and combined in a triangular shape, so that heat radiation can be more uniformly and effectively projected onto the product, the occurrence of a cold source is reduced, and the sterilization effect of the product is controlled.

Description

Technical Field

[0001] This application relates to the field of microwave heating technology, specifically to a microwave tunnel furnace. Background Technology

[0002] Traditional dairy products undergo sterilization using microwave tunnel ovens. This process involves controlling the tunnel conveyor speed and the intensity of the microwave heat source within the oven. However, in actual production, factors such as microwave frequency and fluctuations, cavity size and shape, product shape and size, and changes in the product's dielectric constant during heating can lead to hot and cold spots, as well as thermal runaway. This can result in incomplete microbial sterilization or product scorching, failing to meet standards and causing unstable product quality that affects normal market availability.

[0003] Existing technologies improve the distribution of magnetrons within microwave tunnel ovens to control the sterilization effect, thereby achieving stable product quality improvement and meeting microbial control indicators, enabling products to be launched on the market normally.

[0004] However, the drawbacks of uneven distribution of microwave heat sources and uncontrollable radiation temperature still exist in microwave tunnel ovens. Utility Model Content

[0005] To address the problems mentioned in the background technology and achieve uniform heat source distribution and controllable radiation temperature within the tunnel, this application provides a microwave tunnel furnace. The furnace includes a microwave tunnel and multiple hot air ducts. The hot air ducts are located at one end of the microwave tunnel and pass through it. Multiple ventilation holes are arranged side-by-side on the surface of the hot air ducts to control the temperature within the tunnel. The microwave tunnel includes multiple magnetic control components, each comprising a first fan and a temperature control device. The temperature control device includes a magnetic sheet extending from one end within the temperature control device into the first fan to control the temperature output by the first fan.

[0006] With this setup, the hot air duct is positioned below the magnetic control component and blows hot air into the microwave tunnel. The magnetic control component can adjust the hot air blown out by the hot air duct to make the temperature inside the microwave tunnel more uniform. The temperature control device can react to the current temperature inside the tunnel and control the output power of the first fan on one side. At the same time, it controls the spacing between the magnetic plates inside the temperature control device to adjust the output temperature.

[0007] According to one embodiment of the present application, the microwave tunnel further includes a conveyor belt, which is disposed in the lower middle part of the microwave tunnel, and the magnetron assembly is arranged at intervals above the conveyor belt.

[0008] According to one embodiment of the present application, at least three rows of magnetic control components are provided on one side of the conveyor belt, and the multiple magnetic control components are arranged in a triangular pattern.

[0009] This configuration, using a triangular arrangement, allows for more even and effective heat radiation projection onto the product, reducing the presence of cold sources and controlling the sterilization effect. Furthermore, the triangular arrangement avoids air pressure differences, thus preventing temperature instability within the microwave tunnel and minimizing its impact on the uniformity of the product's surface temperature.

[0010] According to one embodiment of this application, the input end of the hot air duct is connected to a second fan, and the ventilation hole is arranged facing the magnetic control component.

[0011] With this configuration, the hot air duct delivers hot air downwards, and because hot air tends to rise, it can further even out the temperature throughout the tunnel. At the same time, the ventilation holes of the hot air duct are located between each magnetocontrol component to reduce the occurrence of cold sources between the magnetocontrol components and ensure that the heat source is evenly distributed within the microwave tunnel.

[0012] According to one embodiment of the present application, the temperature control device further includes a first housing and a control device. The control device is installed at one end of the first housing, and an opening is provided on one side of the first housing to expose a portion of the magnetic sheet.

[0013] With this setup, the control equipment on the temperature control device can receive the current temperature of the area and adjust the magnetic sheet and the first fan. On the other hand, it can send out the current temperature information to enable the operator to change the running speed of the conveyor belt in the microwave tunnel, thereby controlling the sterilization effect of the product.

[0014] According to one embodiment of this application, the bottom of the first outer shell is provided with a plurality of through holes, and bolts are provided in the through holes for fixing and connecting the microwave tunnel.

[0015] With this configuration, the bottom of the first outer shell is fixedly connected to the shell surface of the microwave tunnel, and a heat-conducting plate is provided directly below each magnetron assembly. The heat-conducting plate can promote the temperature diffusion of the current section and further reduce the possibility of cold sources appearing between the magnetron assemblies.

[0016] According to one embodiment of this application, a magnetic sheet is disposed inside a first housing, the side of the magnetic sheet is connected to the inner wall of the first housing, the magnetic sheet has at least two creases, and multiple magnetic sheets are stacked and arranged along the height of the first housing.

[0017] The side of the magnetic sheet is slidably connected to the inner wall of the first housing, and the magnetic sheet extends to the lower part of the fan in the first fan. Since the spacing between the magnetic sheets is adjustable, the temperature output by the magnetic sheet can be controlled by adjusting the distance, thereby regulating the temperature inside the first fan and thus controlling the overall output temperature.

[0018] According to one embodiment of the present application, the first fan includes a second housing and a fan, one side of the second housing is fixedly connected to the first housing, and the fan is installed inside the second housing.

[0019] According to one embodiment of this application, the second housing includes an arc-shaped fixing plate, and the fan is fixedly connected to the fixing plate.

[0020] With this configuration, the bottom of the fan is fixedly connected to the mounting plate, which secures the fan and prevents it from vibrating during rotation, thus preventing the connection between the magnetic control component and the microwave tunnel from becoming loose.

[0021] According to one embodiment of the present application, an opening is provided at one end of the fan, and the opening faces the magnetic sheet.

[0022] With this configuration, the opening at the bottom of the fan is connected to the inside of the first housing, allowing the temperature generated by the magnetic plate to be further transferred to the fan and output into the microwave tunnel.

[0023] This application provides a microwave tunnel oven, which includes a microwave tunnel and multiple hot air ducts. The hot air ducts are located at one end of the microwave tunnel and pass through it. Multiple ventilation holes are arranged side-by-side on the surface of the hot air ducts to control the temperature inside the tunnel. The microwave tunnel includes multiple magnetic control components, each including a first fan and a temperature control device. The temperature control device includes magnetic sheets extending from one end of the temperature control device into the first fan to control the output temperature of the first fan. The hot air ducts are located below the magnetic control components and blow hot air into the microwave tunnel. The magnetic control components can adjust the hot air blown out by the hot air ducts to make the temperature inside the microwave tunnel more uniform. The temperature control device can react to the current temperature inside the tunnel and control the output power of the first fan on one side, while also controlling the spacing between the magnetic sheets inside the temperature control device to adjust the output temperature. The triangular arrangement of the hot air ducts allows for more uniform and effective heat radiation onto the product, reducing the presence of cold sources and controlling the sterilization effect of the product. Furthermore, the triangular arrangement of the magnetron components avoids wind pressure differences, thereby preventing temperature instability inside the microwave tunnel and reducing the impact on the surface temperature uniformity of the product. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1This is a schematic diagram of the structure of a microwave tunnel furnace provided in an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the structure of the magnetic control component provided in the embodiments of this application;

[0027] Figure 3 This is a schematic diagram of the distribution of the magnetic control components provided in the embodiments of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100-Microwave tunnel; 200-Magnetic control assembly; 210-First fan; 211-Second outer casing; 212-Fan; 213-Fixing plate; 220-Temperature control device; 221-Magnetic sheet; 222-First outer casing; 223-Control device; 300-Hot air duct; 310-Ventilation hole; 400-Second fan.

[0030] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0033] Secondly, it should be noted that in the description of this application, the terms "front", "rear", "left", "right", "up", "down", "inner", "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0034] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In the description of this application, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] Traditional dairy products undergo sterilization using microwave tunnel ovens. This process involves controlling the tunnel conveyor speed and the intensity of the microwave heat source within the oven. However, in actual production, factors such as microwave frequency and fluctuations, cavity size and shape, product shape and size, and changes in the product's dielectric constant during heating can lead to hot and cold spots, as well as thermal runaway. This can result in incomplete microbial sterilization or product scorching, failing to meet standards and causing unstable product quality that affects normal market availability.

[0037] Existing technologies improve the distribution of magnetrons within microwave tunnel ovens to control the sterilization effect, thereby achieving stable product quality improvement and meeting microbial control indicators, enabling products to be launched on the market normally.

[0038] However, the drawbacks of uneven distribution of microwave heat sources and uncontrollable radiation temperature still exist in microwave tunnel ovens.

[0039] This application aims to provide a microwave tunnel oven that primarily addresses the drawbacks of uneven microwave heat source distribution and uncontrollable radiation temperature. Application examples have demonstrated that this application significantly reduces temperature deviation, ensuring products fully meet standards and effectively improving production line efficiency.

[0040] Figure 1 This is a schematic diagram of the structure of a microwave tunnel furnace provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the magnetic control component provided in the embodiments of this application; Figure 3 This is a schematic diagram of the distribution of the magnetic control components provided in the embodiments of this application.

[0041] like Figure 1 , Figure 2 , Figure 3 As shown, this application provides a microwave tunnel oven, which includes a microwave tunnel 100 and multiple hot air pipes 300. The hot air pipes 300 are disposed at one end of the microwave tunnel 100 and pass through the microwave tunnel 100. Multiple ventilation holes 310 are arranged side by side on the surface of the hot air pipes 300 to control the temperature inside the tunnel. The microwave tunnel 100 includes multiple magnetic control components 200. The magnetic control components 200 include a first fan 210 and a temperature control device 220. The temperature control device 220 includes a magnetic sheet 221. The magnetic sheet 221 extends from one end inside the temperature control device 220 into the first fan 210 to control the temperature output by the first fan 210.

[0042] It should be noted that the hot air duct 300 is located below the magnetic control component 200 and blows hot air into the microwave tunnel 100. The magnetic control component 200 can adjust the hot air blown out by the hot air duct 300 to make the temperature inside the microwave tunnel 100 more uniform. The temperature control device 220 can react according to the current temperature inside the tunnel and control the output power of the first fan 210 on one side. At the same time, it controls the spacing between the magnetic sheets 221 inside the temperature control device 220 to adjust the output temperature.

[0043] It is worth mentioning that the hot air pipe 300 is located below the magnetic control component 200, which is located directly above the microwave tunnel 100. During operation, the hot air pipe 300 blows hot air downwards at a 45-degree angle, and the magnetic control component 200 outputs heat radiation to the tunnel wall, thereby heating the tunnel.

[0044] According to one embodiment of the present application, the microwave tunnel 100 further includes a conveyor belt, which is disposed in the lower middle part of the microwave tunnel 100, and the magnetron assembly 200 is arranged at intervals above the conveyor belt.

[0045] According to one embodiment of the present application, at least three rows of magnetic control components 200 are provided on one side of the conveyor belt, and the multiple magnetic control components 200 are arranged in a triangular pattern.

[0046] It should be noted that the magnetrons 200 are arranged at the top of the microwave tunnel 100 in a parallel manner. In the embodiment provided in this application, the spacing h1 between each magnetron 200 is set to 580mm, and the spacing h3 between the three rows of magnetrons 200 is set to 93mm. It is worth mentioning that in the second row of magnetrons 200, the spacing h2 between the first magnetron 200 and the first magnetron 200 in the first or third row is set to 290mm, which is exactly half the spacing between each magnetron 200, so as to form a triangular arrangement.

[0047] It is worth mentioning that the starting point of each spacing distance is taken as the origin from the center point of each magnetic control component 200.

[0048] It should be noted that the triangular arrangement allows for more even and effective heat radiation projection onto the product, reducing the presence of cold sources and controlling the sterilization effect. Furthermore, the triangular layout avoids air pressure differences, thus preventing temperature instability within the microwave tunnel 100 and minimizing its impact on the uniformity of the product's surface temperature.

[0049] Traditional parallel arrangement methods tend to create large cold sources between columns and rows, which is not conducive to the balanced temperature control of microwave products.

[0050] According to one embodiment of the present application, the input end of the hot air duct 300 is connected to a second fan 400, and the ventilation hole 310 is arranged facing the magnetic control component 200.

[0051] It should be noted that the hot air duct 300 delivers hot air upwards, and because hot air rises easily, it can further even out the temperature throughout the tunnel. At the same time, the ventilation holes of the hot air duct 300 are set between each magnetic control component 200 to reduce the occurrence of cold sources between magnetic control components 200 and ensure that the heat source distribution in the microwave tunnel 100 is uniform.

[0052] It is worth mentioning that the second fan 400 provided in this application embodiment has a heating power of 15kw, a frequency of 50hz, a fan power of 0.55kw, and a fan pressure of 1020Pa. This application does not make specific limitations on these aspects.

[0053] According to one embodiment of the present application, the temperature control device 220 further includes a first housing 222 and a control device 223. The control device 223 is installed at one end of the first housing 222, and an opening is provided on one side of the first housing 222 to expose part of the magnetic sheet 221.

[0054] It should be noted that the control device 223 on the temperature control device 220 can receive the current temperature of the area and make adjustments to the magnetic sheet 221 and the first fan 210. On the other hand, it can send the current temperature information to the operator to change the running speed of the conveyor belt in the microwave tunnel 100, thereby controlling the sterilization effect of the product.

[0055] According to one embodiment of this application, the bottom of the first outer shell 222 is provided with a plurality of through holes, and bolts are provided in the through holes for fixing and connecting the microwave tunnel 100.

[0056] It should be noted that the bottom of the first outer shell 222 is fixedly connected to the shell surface of the microwave tunnel 100, and a heat-conducting plate is provided directly below each magnetron assembly 200. The heat-conducting plate can promote the temperature diffusion of the current section and further reduce the possibility of cold sources appearing between the magnetron assemblies 200.

[0057] According to one embodiment of the present application, a magnetic sheet 221 is disposed inside a first outer shell 222, the side of the magnetic sheet 221 is connected to the inner wall of the first outer shell 222, the magnetic sheet 221 is provided with at least two creases, and multiple magnetic sheets 221 are stacked and arranged along the height of the first outer shell 222.

[0058] It should be noted that the side of the magnetic sheet 221 is slidably connected to the inner wall of the first housing 222, and the magnetic sheet 221 extends to the lower part of the fan 212 in the first fan 210. Since the spacing between the magnetic sheets 221 is adjustable, the temperature output by the magnetic sheet 221 can be controlled by adjusting the distance, thereby regulating the temperature inside the first fan 210 and thus controlling the overall output temperature.

[0059] According to one embodiment of the present application, the first fan 210 includes a second housing 211 and a fan 212. One side of the second housing 211 is fixedly connected to the first housing 222, and the fan 212 is partially installed inside the second housing 211.

[0060] According to one embodiment of the present application, the second housing 211 includes an arc-shaped fixing plate 213, and the fan 212 is fixedly connected to the fixing plate 213.

[0061] The bottom of the fan 212 is fixedly connected to the fixing plate 213. The fixing plate 213 is used to fix the fan 212 to prevent the fan 212 from shaking during rotation and to prevent the connection between the magnetic control component 200 and the microwave tunnel 100 from becoming loose.

[0062] According to one embodiment of the present application, the fan 212 has an opening at one end, which faces the magnetic sheet 221.

[0063] It should be noted that the opening at the bottom of the fan 212 is connected to the interior of the first housing 222, so that the temperature generated by the magnetic sheet 221 is further transferred to the fan 212 and output into the microwave tunnel 100.

[0064] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0065] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A microwave tunnel oven, characterized in that, The device includes a microwave tunnel (100) and multiple hot air ducts (300). The hot air ducts (300) are located at one end of the microwave tunnel (100) and pass through the microwave tunnel (100). Multiple ventilation holes (310) are arranged side by side on the surface of the hot air ducts (300). The hot air ducts (300) are used to control the temperature inside the microwave tunnel (100). The microwave tunnel (100) includes multiple magnetic control components (200). The magnetic control components (200) include a first fan (210) and a temperature control device (220). The temperature control device (220) includes multiple magnetic sheets (221). The magnetic sheets (221) can slide along the height direction of the temperature control device (220) to control the temperature of the airflow blown out by the first fan (210).

2. A microwave tunnel oven according to claim 1, characterized in that, The microwave tunnel (100) also includes a conveyor belt, which is located in the lower middle part of the microwave tunnel (100), and the magnetron assembly (200) is arranged at intervals above the conveyor belt.

3. A microwave tunnel oven according to claim 2, characterized in that, At least three rows of magnetic control components (200) are provided on one side of the conveyor belt, and the plurality of magnetic control components (200) are arranged in a triangular pattern.

4. A microwave tunnel oven according to claim 1, characterized in that, The input end of the hot air duct (300) is connected to a second fan (400), and the ventilation hole (310) is oriented toward the magnetic control component (200).

5. A microwave tunnel oven according to claim 1, characterized in that, The temperature control device (220) further includes a first housing (222) and a control device (223). The control device (223) is installed at one end of the first housing (222), and an opening is provided on one side of the first housing (222) to expose part of the magnetic sheet (221).

6. A microwave tunnel oven according to claim 5, characterized in that, The bottom of the first outer shell (222) is provided with multiple through holes, and bolts are provided in the through holes for fixing and connecting the microwave tunnel (100).

7. A microwave tunnel oven according to claim 5, characterized in that, The magnetic sheet (221) is disposed inside the first outer shell (222). The side of the magnetic sheet (221) is fixedly connected to the inner wall of the first outer shell (222). The magnetic sheet (221) has at least two creases. Multiple magnetic sheets (221) are stacked along the height direction of the first outer shell (222). The magnetic sheet (221) extends into the first fan (210).

8. A microwave tunnel oven according to claim 7, characterized in that, The first fan (210) includes a second housing (211) and a fan (212). One side of the second housing (211) is connected to the first housing (222), and the fan (212) is partially installed inside the second housing (211).

9. A microwave tunnel oven according to claim 8, characterized in that, The second housing (211) includes an arc-shaped fixing plate (213), and the fan (212) is fixedly connected to the fixing plate (213).

10. A microwave tunnel oven according to claim 9, characterized in that, The fan (212) has an opening at one end, which faces the magnetic sheet (221).

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