A heat distribution and product heat penetration testing device and food tunnel oven

Abstract

The utility model belongs to food processing equipment technical field relates to a heat distribution and product heat penetration testing device and food tunnel furnace. Testing device includes temperature measurement heat preservation box, movable connecting rod, sensor fixed link, temperature sensor and support frame, and there is sensor recorder in temperature measurement heat preservation box, there are a plurality of through -holes on sensor fixed link, and temperature sensor is installed in the through -hole, sensor fixed link sets up on support frame, and sensor fixed link can carry out height adjustment along support frame, and the both ends of movable connecting rod are connected with sensor fixed link and temperature measurement heat preservation box respectively. Food tunnel furnace includes mesh belt, oven and testing device. The utility model discloses through along sensor fixed link and arranges multiple temperature sensors, realized the measurement of temperature in the width direction of tunnel furnace, through adjusting the height of sensor fixed link, obtains the temperature data of different height space in the stove, adjusts the temperature measurement head of temperature sensor to contact mesh belt surface, can measure mesh belt temperature.

Description

Technical Field

[0001] This utility model relates to a heat distribution and product heat penetration testing device and a food tunnel oven, belonging to the technical field of food processing equipment. Background Technology

[0002] As a key continuous baking and heat treatment equipment in the modern food industry, the uniformity and stability of the internal heat field distribution in tunnel ovens are core process parameters that determine the color, taste, and safety of products. Understanding the heat distribution state inside the tunnel oven is fundamental to achieving process optimization and quality control.

[0003] However, existing tunnel furnace temperature measurement technologies face several long-standing unresolved challenges: First, existing temperature measuring devices have fixed and sparse measuring points, resulting in numerous monitoring blind spots. For example, the locations of thermocouples or resistance temperature detectors (RTDs) fixed to the oven wall are usually determined during the design phase and cannot be flexibly adjusted according to actual production needs. This leads to blind spots in temperature monitoring at the four corners of the heating cavity and around the product, failing to accurately reflect the thermal environment experienced by the product throughout the baking process.

[0004] Secondly, traditional temperature measuring devices primarily measure the air temperature inside the oven cavity (i.e., the ambient temperature). However, for food transported by conveyor belts, the heating of the bottom surface in contact with the conveyor belt, as well as the uniformity of the conveyor belt's temperature, directly affects the product's bottom shaping, coloring, and even whether overheating or sticking occurs. Existing devices generally lack the ability to measure the surface temperature of the conveyor belt.

[0005] Third, in order to achieve mobile temperature measurement, some solutions use wireless data loggers. However, calibration, position adjustment and other operations usually have to be carried out when the equipment is completely stopped and cooled down. This not only directly interrupts continuous production and affects production efficiency, but more importantly, the installation of sensors when the equipment is stopped will lead to inaccurate test temperatures.

[0006] Fourth, existing temperature measuring units are mostly rigidly connected to the tunnel furnace body using bolts. Installing, removing, or maintaining the measuring device requires cumbersome mechanical disassembly and electrical wiring, making the operation complex, time-consuming, and labor-intensive. Furthermore, the disassembly and assembly operations can easily cause mechanical damage to the furnace insulation structure or the temperature measuring components themselves, reducing the reliability of the equipment.

[0007] Fifth, all existing measurement methods can only measure the ambient temperature of the equipment, and cannot directly and in real time obtain the temperature change at the geometric center point of the food material during the heating process, that is, they cannot obtain the heat penetration data of the product.

[0008] In summary, these problems with existing technologies limit the accuracy of temperature measurement and production efficiency of tunnel furnaces, failing to meet the demands for high-precision, full-coverage, and continuous production. Therefore, there is an urgent need in this field for a heat distribution and product heat penetration testing device capable of measuring the three-dimensional heat distribution of the tunnel furnace, the surface temperature of the conveyor belt, and the internal heat penetration characteristics of the product without interrupting production. Utility Model Content

[0009] The purpose of this invention is to provide a heat distribution and product heat penetration testing device, which overcomes the shortcomings of existing tunnel furnace temperature measurement devices, such as many blind spots, limited coverage, and inability to fully and accurately reflect the real thermal environment inside the furnace.

[0010] The technical solution provided by this utility model is as follows: A heat distribution and product heat penetration testing device includes a temperature measuring and insulation box, a movable connecting rod, a sensor fixing rod, multiple temperature sensors, and a support frame. A sensor recorder is installed inside the temperature measuring and insulation box. The sensor fixing rod has multiple through holes along its length, and the temperature sensors can be selectively installed in different through holes to measure the temperature distribution along the width of the tunnel furnace. The sensor fixing rod is mounted on the support frame and its height can be adjusted along the support frame to change the height position of the temperature sensor's measuring head. Both ends of the movable connecting rod are pinned to the sensor fixing rod and the temperature measuring and insulation box, respectively.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, a sensor fixing bolt is provided in the through hole of the sensor fixing rod, the temperature sensor passes through the through hole and is fixed by the sensor fixing bolt, and the temperature sensor is electrically and / or signal connected to the sensor recorder.

[0013] Furthermore, the movable connecting rod is rotatably connected to the temperature measuring and insulation box via a connecting rod pin.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the movable linkage can rotate freely relative to the temperature measuring and insulation box, so that the testing device can better adapt to the movement state of the mesh belt as it moves with the mesh belt.

[0015] Furthermore, at least one of the temperature sensors has a temperature sensor head that can be inserted into the food moving with the conveyor belt to measure the product's heat penetration data.

[0016] The beneficial effect of adopting the above-mentioned further scheme is that it can directly and in real time obtain the temperature of the geometric center point of the product during the heating process (i.e., heat penetration data), which provides indispensable key data for verifying the effectiveness of sterilization or curing processes, evaluating the degree of curing of the product center, and establishing heat transfer models.

[0017] Furthermore, the temperature measurement and insulation box is made of heat-insulating material to protect the internal sensor recorder from operating normally in high-temperature environments.

[0018] The beneficial effect of adopting the above-mentioned further solution is that, through the protection of the heat insulation material, a relatively stable low-temperature working environment is provided for the internal core sensor recorder, preventing data recording abnormalities or equipment damage caused by continuous high temperature inside the furnace, and ensuring the integrity and reliability of data acquisition throughout the entire testing process.

[0019] Furthermore, the support frame includes at least two sensor height adjusting screws, which are vertically arranged. The sensor fixing rod is provided with a threaded hole, and the sensor fixing rod is connected to the two sensor height adjusting screws through the threaded hole.

[0020] The beneficial effect of adopting the above-described further solution is that the height of the sensor fixing rod can be adjusted by rotating the sensor height adjusting screw, thereby adjusting the height position of the temperature sensor's measuring head to adapt to temperature measurement requirements at different heights. The dual-screw synchronous adjustment structure ensures that the sensor fixing rod moves smoothly and without deflection during lifting and lowering, and can be reliably fixed at any height through the self-locking characteristic of the threads.

[0021] Furthermore, the support frame is provided with multiple sensor fixing rods spaced apart along the height direction.

[0022] The beneficial effect of adopting the above-mentioned further scheme is that it can obtain complete vertical temperature gradient distribution data from the surface of the mesh belt to the top of the furnace in one go, providing key data support for analyzing the hot air circulation characteristics and temperature stratification phenomenon in the furnace.

[0023] Another technical solution provided by this utility model is as follows: a food tunnel oven, including a mesh belt, an oven, and the aforementioned heat distribution and product heat penetration testing device, wherein the mesh belt passes through the oven, the temperature measuring and heat preservation box is placed on the mesh belt and can move with the mesh belt through the oven, and the support frame is installed on the mesh belt.

[0024] Compared with existing technologies, the technical solution provided by this utility model has the following beneficial effects: Integrating the heat distribution and product heat penetration testing device into a food tunnel oven forms a complete online detection system, enabling comprehensive and real-time evaluation of the oven's thermal state without interrupting normal production. The testing device synchronously passes through the entire oven with the conveyor belt, completely recording the real temperature field changes experienced by the product along the entire baking trajectory. The obtained data covers the entire process from inlet to outlet. By correlating spatial temperature data, conveyor belt surface temperature data, product core temperature data, and oven position / time information (recorded by a timing device), the intrinsic relationship between heat distribution uniformity, heat penetration rate, and product quality can be analyzed, providing a basis for process optimization.

[0025] Based on the above technical solution, the present invention can be further improved as follows.

[0026] Furthermore, a timing device is provided at the entrance of the oven, which is used to record the time when the temperature measuring and insulation box enters and leaves the oven.

[0027] The advantage of adopting the above-mentioned further solution is that, through the timing device, each temperature data point can be correlated with its position or time in the oven, thereby constructing a complete curve of temperature change over time / position.

[0028] Compared with the prior art, the technical solution provided by this utility model has the following advantages: This utility model realizes the measurement of temperature distribution in the width direction of the tunnel oven by means of multiple temperature sensors that can be arranged along the sensor fixing rod; by adjusting the height of the sensor fixing rod, the height of the temperature sensor head can be adjusted, which can not only obtain temperature data of different height spaces in the oven, but also adjust the temperature sensor head to the contact mesh belt surface for measuring the mesh belt temperature; by directly inserting the sensor head into the center of products such as biscuits, the temperature change of the center of the product during processing (heat penetration data) can be monitored and recorded in real time; the entire testing device can pass through the oven synchronously with the mesh belt without interrupting production due to sensor installation, calibration or adjustment. This not only ensures the continuity of production, but also avoids the difference in system hot and cold states caused by installation stoppage, thus ensuring that the measured temperature data truly reflects the actual continuous production conditions; in addition, the device has no rigid connection with the tunnel oven body, and there is no need to disassemble bolts or wires, avoiding potential damage to the oven structure or components. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the food tunnel oven of this utility model; Figure 2 For the present utility model Figure 1 An enlarged structural diagram of part A; Figure 3 For the present utility model Figure 2 An enlarged structural diagram of part B; Figure 4 A schematic diagram of the structure of the testing device of this utility model for measuring the internal temperature of a biscuit; Figure 5 A schematic diagram of the structure of the testing device of this utility model for measuring the temperature state of the mesh belt; Figure 6 This is a schematic diagram of the structure of the testing device of this utility model for measuring the temperature state of space.

[0031] In the diagram: 1. Mesh belt; 2. Oven; 3. Cookies; 4. Sensor fixing rod; 5. Temperature sensor; 6. Movable connecting rod; 7. Connecting rod pin; 8. Temperature measuring and insulation box; 9. Sensor height adjustment screw; 10. Sensor fixing bolt. Detailed Implementation

[0032] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the objects described and do not imply any priority in order or any specific technical meaning. Furthermore, the concepts of "connection" and "linkage" mentioned in this application, unless otherwise specified, are considered to include both direct connection (linkage) and indirect connection (linkage).

[0033] When interpreting the description of this application, it should be clarified that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating directions or positional relationships, are based on the perspective and layout shown in the accompanying drawings. They are intended to facilitate explanation and simplify the description process, and are not absolute limitations on the actual location, construction method, or operating mode of the described device or element. Therefore, these terms should not be construed as restrictive interpretations of the content of this application.

[0034] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0035] like Figure 1 - Figure 6 As shown, a heat distribution and product heat penetration testing device includes a temperature measuring and insulation box 8, a movable connecting rod 6, a sensor fixing rod 4, multiple temperature sensors 5, and a support frame. A sensor recorder is installed inside the temperature measuring and insulation box 8. The sensor fixing rod 4 has multiple through holes along its length, and the temperature sensors 5 can be selectively installed in different through holes to measure the temperature distribution along the width of the tunnel furnace. The sensor fixing rod 4 is mounted on the support frame and can be height-adjusted along the support frame, causing the temperature sensors 5 on it to move in the height direction, thereby changing the height position of the temperature sensor head. The two ends of the movable connecting rod 6 are respectively pinned to the sensor fixing rod 4 and the temperature measuring and insulation box 8.

[0036] A sensor fixing bolt 10 is provided in the through hole of the sensor fixing rod 4. The temperature sensor 5 passes through the through hole and is fixed by the sensor fixing bolt 10. The temperature sensor 5 is electrically and / or signal connected to the sensor recorder.

[0037] The movable link 6 is rotatably connected to the temperature measuring and insulation box 8 via the link pin 7. The movable link 6 can rotate freely relative to the temperature measuring and insulation box 8, so that it can better adapt to the movement state of the mesh belt 1 as the device moves with the mesh belt 1.

[0038] like Figure 3 heat exchange Figure 4 As shown, at least one of the temperature sensors 5 has a temperature sensor head that can be inserted into the food moving with the conveyor belt 1 to measure the product's heat penetration data. This allows for direct, real-time acquisition of the temperature at the geometric center of the product during heating (i.e., heat penetration data), providing essential data for verifying the effectiveness of sterilization or cooking processes, assessing the degree of central cooking of the product, and establishing heat transfer models.

[0039] The temperature measurement and insulation box 8 is made of heat-insulating material to protect the internal sensor recorder from abnormal operation in high-temperature environments. This heat insulation material prevents abnormal data recording or equipment damage caused by continuous high temperatures inside the furnace, ensuring the integrity and reliability of data acquisition throughout the entire testing process.

[0040] The support frame includes at least two sensor height adjusting screws 9, which are vertically arranged. The sensor fixing rod 4 has threaded holes, and the sensor fixing rod 4 is connected to the two sensor height adjusting screws 9 through these threaded holes. Rotating the sensor height adjusting screws 9 allows for height adjustment of the sensor fixing rod 4, thereby adjusting the height position of the temperature sensor 5's measuring head to meet temperature measurement requirements at different heights. The dual-screw synchronous adjustment structure ensures smooth and non-deflecting movement of the sensor fixing rod 4 during lifting and lowering, and allows for reliable fixing at any height through the self-locking characteristic of the threads.

[0041] In another embodiment, multiple sensor fixing rods 4 are spaced apart along the height direction on the support frame. This allows for the simultaneous acquisition of complete vertical temperature gradient distribution data from the surface of the mesh belt 1 to the furnace top space within the tunnel furnace, providing crucial data support for analyzing the hot air circulation characteristics and temperature stratification phenomena within the furnace.

[0042] This invention achieves continuous measurement of temperature distribution along the width of the tunnel furnace by using multiple temperature sensors 5 that can be arranged along the sensor fixing rod 4; by adjusting the height of the sensor fixing rod 4, the height of the temperature sensor 5's measuring head can be adjusted, allowing for the acquisition of temperature data at different heights within the furnace (such as...). Figure 6 As shown), and the temperature sensor 5 can be adjusted to a position on the surface of the contact belt 1 (as shown). Figure 5 As shown), it is used to measure the temperature of conveyor belt 1; by directly inserting the sensor's temperature probe into the center of products such as biscuits 3, it is possible to monitor and record the center temperature change of the product during processing in real time (heat penetration data, such as...). Figure 2 and Figure 3 (As shown in the figure) The entire testing device can pass through the oven 2 synchronously with the mesh belt 1 without interrupting production due to the installation, calibration or adjustment of sensors. This not only ensures the continuity of production, but also avoids the difference in system temperature caused by the shutdown for installation, thereby ensuring that the measured temperature data truly reflects the actual continuous production conditions. In addition, the device is not rigidly connected to the tunnel oven body, and there is no need to disassemble bolts or lines, avoiding potential damage to the oven structure or components.

[0043] like Figure 1 As shown, a food tunnel oven includes a mesh belt 1, an oven 2, and the aforementioned heat distribution and product heat penetration testing device. The mesh belt 1 passes through the oven 2, the temperature measuring and heat preservation box 8 is placed on the mesh belt 1 and can move with the mesh belt 1 through the oven 2, and the support frame is installed on the mesh belt 1.

[0044] A timing device is installed at the entrance of the oven 2 to record the time when the temperature measuring and insulation box 8 enters and leaves the oven 2. The timing device allows each temperature data point to be correlated with its position or time within the oven 2, thereby constructing a complete curve of temperature change over time / position.

[0045] The heat distribution and product heat penetration testing device is integrated into a food tunnel oven, forming a complete online detection system. This system can comprehensively and in real-time evaluate the thermal state inside the oven without interrupting normal production. The testing device passes synchronously through the entire oven 2 with the mesh belt 1, and can completely record the real temperature field changes experienced by the product throughout the baking trajectory. The obtained data covers the entire process from inlet to outlet. By correlating the spatial temperature data, the surface temperature data of the mesh belt 1, the core temperature data of the product, and the position / time information inside the oven (recorded by a timing device), the intrinsic relationship between heat distribution uniformity, heat penetration rate, and product quality can be analyzed, providing a basis for process optimization.

[0046] The testing method of the testing device of this utility model is as follows: Before testing, the sensors are first installed and arranged: multiple temperature sensors 5 are passed through the corresponding through holes on the sensor fixing rod 4, and after determining the measurement position, they are tightened using sensor fixing bolts 10. By installing the temperature sensors 5 in the through holes at different positions, the temperature distribution along the width of the tunnel furnace can be measured. Finally, the cables of each sensor are connected to the sensor recorder inside the temperature measurement and insulation box 8.

[0047] During heat distribution testing, the vertical height of the temperature sensor 5 is changed by adjusting the sensor height adjusting screw 9. If it is necessary to measure the temperature of the conveyor belt 1, the temperature measuring head of the temperature sensor 5 is lowered to contact the surface of the conveyor belt 1; if it is necessary to measure the ambient temperature inside the furnace, the temperature measuring head is raised to the predetermined height.

[0048] After all sensors are positioned in the width and height directions, the entire temperature measuring device is placed on the running conveyor belt 1. The temperature measuring device enters the oven 2 along with the conveyor belt 1, and the timing device at the oven inlet automatically records its entry time.

[0049] When conducting a heat penetration test on a product, the temperature sensor 5 must be adjusted to a suitable height and inserted into the product, such as a biscuit 3, which moves with the conveyor belt 1. Similarly, the testing device enters the oven 2 with the conveyor belt 1, and the entry time is recorded by a timing device.

[0050] When the temperature measuring device travels with the conveyor belt 1 to the end of the oven 2, the timing device records the time it takes for the food to be removed from the oven. The operator then removes the testing device from the conveyor belt 1.

[0051] After the test, by reading and integrating the temperature data stored by the sensor recorder in the temperature measuring and insulation box 8 and the time information recorded by the timing device in the oven 2, the temperature distribution of each position in the oven during the entire baking process can be analyzed comprehensively and accurately.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for testing heat distribution and product heat penetration, characterized in that, Includes a temperature measuring and insulation box (8), a movable connecting rod (6), a sensor fixing rod (4), multiple temperature sensors (5), and a support frame. The temperature measuring and insulation box (8) is equipped with a sensor recorder; The sensor fixing rod (4) has multiple through holes along its length, and the temperature sensor (5) can be selectively installed in different through holes; The sensor fixing rod (4) is mounted on the support frame. The sensor fixing rod (4) can be adjusted in height along the support frame to change the height position of the temperature sensor (5) measuring head. The two ends of the movable connecting rod (6) are respectively pinned to the sensor fixing rod (4) and the temperature measuring and insulation box (8).

2. The heat distribution and product heat penetration testing device according to claim 1, characterized in that, The sensor fixing rod (4) has a sensor fixing bolt (10) in the through hole. The temperature sensor (5) passes through the through hole and is fixed by the sensor fixing bolt (10). The temperature sensor (5) is electrically and / or signal connected to the sensor recorder.

3. The heat distribution and product heat penetration testing device according to claim 1, characterized in that, The movable connecting rod (6) is rotatably connected to the temperature measuring and insulation box (8) via the connecting rod pin (7).

4. The heat distribution and product heat penetration testing device according to any one of claims 1-3, characterized in that, At least one of the temperature sensors (5) has a temperature sensor head that can be inserted into the food that moves with the mesh belt (1) to measure the heat penetration data of the product.

5. The heat distribution and product heat penetration testing device according to claim 4, characterized in that, The temperature measuring and insulation box (8) is made of heat-insulating material.

6. The heat distribution and product heat penetration testing device according to claim 4, characterized in that, The support frame includes at least two sensor height adjusting screws (9), which are vertically arranged. The sensor fixing rod (4) is provided with a threaded hole, and the sensor fixing rod (4) is connected to the two sensor height adjusting screws (9) through the threaded hole.

7. The heat distribution and product heat penetration testing device according to claim 1, characterized in that, The support frame is provided with multiple sensor fixing rods (4) spaced apart along the height direction.

8. A food tunnel oven, characterized in that, The device includes a mesh belt (1), an oven (2), and a heat distribution and product heat penetration testing device as described in any one of claims 1 to 7. The mesh belt (1) passes through the oven (2), the temperature measuring and heat preservation box (8) of the testing device is placed on the mesh belt (1) and can move with the mesh belt (1) through the oven (2), and the support frame of the testing device is installed on the mesh belt (1).

9. The food tunnel oven according to claim 8, characterized in that, A timing device is provided at the entrance of the oven (2), which is used to record the time when the temperature measuring and heat preservation box (8) enters and leaves the oven (2).

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