Vacuum heater internal temperature detection system and display method thereof

Abstract

The invention belongs to the technical field of vacuum heaters, and discloses a vacuum heater internal temperature detection system which comprises a controller. A power supply module; a thermocouple assembly; the plurality of temperature sensors are respectively arranged on the heating cavity and the carrying table; and the temperature detector is arranged on the shell and is used for detecting the temperature change of the shell. The invention discloses a method for displaying the internal temperature of a vacuum heater. The method comprises the following steps: S1, installing a temperature sensor and an infrared temperature detector; s2, a thermocouple assembly is installed on the sealing door plate; s3, if the carrier plate and the carrier table are not loaded with components, heating after being electrified, repeating for three times, and taking an average value as a reference temperature feature point; and S4, electrifying and heating, displaying the temperature in real time by a display screen, and recording the historical change of the temperature. According to the invention, the detection accuracy is ensured, and meanwhile, the temperature change measurement on the shell is also added, so that the safety work is greatly ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum heaters, and in particular relates to a vacuum heater internal temperature detection system and a display method thereof. Background Art

[0002] At present, photovoltaic is the abbreviation of solar photovoltaic power generation system, which is a new power generation system that uses the photovoltaic effect of solar cell semiconductor materials to directly convert solar radiation energy into electrical energy. It has two modes of operation: independent operation and grid-connected operation.

[0003] When the existing solar photovoltaic panels are being coated, they need to be cleaned to ensure the cleanliness of the surface, and then they need to be heated as a whole in a vacuum heater. However, the existing vacuum heaters are usually powered on for heating gradually, which leads to unstable heating of the photovoltaic panel substrate coating, local overtemperature, temperature differences on the substrate, and uneven substrate coating. Summary of the invention

[0004] In order to solve the problems in the related art, the present application provides a vacuum heater internal temperature detection system and a display method thereof, which solve the defects mentioned in the background technology.

[0005] The technical solution is as follows: A vacuum heater internal temperature detection system, the vacuum heater comprises: a shell; a heating cavity, arranged inside the shell; a sealing door plate, arranged on the shell and used to seal the heating cavity; a heating device, arranged inside the heating cavity, comprising a heating bracket, the heating bracket is cylindrical, a heating coil assembly is wound around the heating bracket, a control tube assembly is installed on the shell, and the control tube assembly is electrically connected to the heating coil assembly; a carrier, arranged at the center of the heating bracket, and the carrier is slidably installed in the heating cavity; the internal temperature detection system comprises: a controller, arranged on the shell; a power module, used to connect an external power supply and power the entire detection system; a thermocouple assembly, installed on the sealing door plate and the carrier; a plurality of temperature sensors, respectively installed on the heating cavity and the carrier; a temperature detector, installed on the shell and used to detect the temperature change of the shell; the controller is respectively connected to the thermocouple assembly, the power module, the temperature sensor and the temperature detector through connecting wires; the controller performs calculations and judgments according to the signals transmitted by the sensor and the temperature detector to obtain an accurate judgment.

[0006] In a further technical solution, the controller adopts one of a single chip microcomputer and a PLC.

[0007] In a further technical solution, the thermocouple assembly includes a mounting hole that passes through the sealing door plate, and a connecting screw is installed on the mounting hole; the connecting screw is located outside the mounting hole and is provided with a plurality of sealing nuts; the connecting screw is located inside the sealing door plate and is provided with a plurality of sealing nuts; the inside of the connecting screw is installed on a thermocouple bracket, and a rigid thermocouple and a flexible thermocouple are respectively installed on the thermocouple bracket.

[0008] In a further technical solution, a carrier plate carrying components is placed on the carrier; a temperature measuring hole corresponding to the thermocouple bracket is opened between the carrier plate and the carrier.

[0009] In a further technical solution, the thermometer is an infrared thermometer installed on the housing to simultaneously detect the temperature of the housing and the sealed door panel.

[0010] In a further technical solution, the controller is further connected to a display module, and the display module is connected to a display screen, and the display screen displays the real-time temperature of each position of the vacuum heater and the temperature change within 1 hour.

[0011] In a further technical solution, the controller is connected to a communication module, and the communication module includes one or more of a serial communication module, an Ethernet communication module, a WIFI communication module, a Bluetooth communication module, and a 4G / 5G communication module.

[0012] In a further technical solution, the heating coil assembly is respectively provided with a first heating coil outside and a second heating coil inside; the control tube assembly includes a first control tube and a second control tube; the first control tube is electrically connected between the controller and the first heating coil, and the second control tube is electrically connected between the controller and the second heating coil The present invention also provides a method for displaying the internal temperature of a vacuum heater, using the aforementioned internal temperature detection system of a vacuum heater, the steps are as follows: S1. Install multiple temperature sensors inside the heating cavity and install an infrared temperature detector on the outer shell; S2. Open the sealed door panel, install the thermocouple assembly on the mounting hole of the sealed door panel, and match the thermocouple bracket with the temperature measuring hole on the carrier; S3, the carrier plate and the carrier are not loaded with components, the controller controls the first control tube and the second control tube to energize the first heating coil and the second heating coil, and heat is generated after power is turned on, and the temperature sensor, infrared temperature detector, and two thermocouples respectively record the temperature changes inside the heating cavity and the temperature changes of the outer shell and the sealing door plate; this process is repeated three times, and the average value is taken as a reference temperature characteristic point; S4. Place the carrier board with components on the carrier, seal the door panels, and the thermocouple bracket reaches the specified position. Then turn on the power for heating. The display screen will display the temperature in real time and record the historical temperature changes. The controller will also compare the measured temperature with the reference temperature characteristic point: if the error does not exceed ±5°, it means that the operation is normal. If the error exceeds ±5°, it means that the operation is abnormal, and the display screen will show a reminder message.

[0013] By adopting the above technical solution, compared with the prior art, the beneficial effects of the technology of this patent are: 1. The heating cavity of the present invention is in a vacuum state to ensure the overall airtightness. A heating coil is also used for heating to ensure uniform internal heating, thereby achieving uniform heating of components such as photovoltaic substrates and carriers. The sealed door panel can ensure sealed heating and heating stability.

[0014] 2. The present invention uses a temperature sensor and a thermocouple to measure temperature, and mutual verification can ensure the accuracy of measurement. The controller can also perform real-time display and data comparison to ensure the smooth operation of the heating cavity.

[0015] 3. The present invention selects more measuring points inside the heating cavity, which increases the workload of measurement, and also increases the workload of data recording and processing, ensuring the accuracy of detection. At the same time, it also adds the temperature change measurement on the outer shell, which brings greater guarantee for safe work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] Figure 1 It is a structural schematic diagram of the vacuum heater in the present invention; Figure 2 It is a schematic diagram of the structure inside the heating cavity of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the sealing door plate and the thermocouple bracket in the present invention.

[0019] Figure 4 It is a principle block diagram of the internal temperature detection system of the vacuum heater in the present invention.

[0020] Figure 5 It is a working flow chart of the internal temperature detection system of the vacuum heater in the present invention.

[0021] In the figure: 1. Shell; 2. Sealing door panel; 3. First control tube; 4. Second control tube; 5. Carrier; 6. First heating coil; 7. Carrier board; 8. Controller; 9. Connecting screw; 10. Sealing nut; 11. Flexible thermocouple; 12. Thermocouple bracket; 13. Rigid thermocouple. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0023] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0024] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] Example 1

[0026] like Figure 1-4 As shown, a vacuum heater internal temperature detection system is provided, wherein the vacuum heater comprises a housing 1, and a heating cavity is arranged in the housing 1. A sealing door plate 2 is arranged on the housing 1 for sealing the heating cavity.

[0027] There is a heating device in the shell 1, which is arranged inside the heating cavity, including a heating bracket, which is cylindrical, and a heating coil assembly is wound around the heating bracket. A control tube assembly is installed on the shell 1, and the control tube assembly is electrically connected to the heating coil assembly. The heating coil assembly is respectively arranged on the first heating coil 6 outside and the second heating coil inside. The control tube assembly includes a first control tube 3 and a second control tube 4. The first control tube 3 is electrically connected between the controller 8 and the first heating coil 6, and the second control tube 4 is electrically connected between the controller 8 and the second heating coil.

[0028] The carrier 5 is arranged at the center of the heating bracket, and the carrier 5 is slidably installed in the heating cavity.

[0029] The above are the general structures of vacuum heaters, which belong to the existing technology. The focus of the present invention is to perform temperature detection based on the above structure.

[0030] The internal temperature detection system includes a controller 8, which is arranged on the housing 1. The controller 8 adopts one of a single-chip microcomputer and a PLC. Both single-chip microcomputers and PLCs are common products that can be purchased on the market. The specific program is programmed by the technical staff of the company, and specific operations can be performed after input.

[0031] The power module is used to connect an external power supply and supply power to the entire detection system.

[0032] Thermocouple assembly is installed on the sealed door panel 2 and the carrier 5. The thermocouple assembly includes a mounting hole that passes through the sealed door panel 2, and a connecting screw 9 is installed on the mounting hole. The connecting screw 9 is provided with a plurality of sealing nuts 10 outside the mounting hole. The connecting screw 9 is provided with a plurality of sealing nuts 10 inside the sealed door panel 2. The inside of the connecting screw 9 is installed on a thermocouple bracket 12, and a rigid thermocouple and a flexible thermocouple 11 are respectively installed on the thermocouple bracket 12. A carrier board 7 carrying components is placed on the carrier 5, and a temperature measuring hole corresponding to the thermocouple bracket 12 is opened between the carrier board 7 and the carrier 5. The thermometer is an infrared thermometer, which is installed on the outer shell 1 and is used to simultaneously detect the temperature of the outer shell 1 and the sealed door panel 2.

[0033] A plurality of temperature sensors are respectively installed on the heating cavity and the carrier 5. The controller 8 is also connected to a display module, which is connected to a display screen, and the real-time temperature of each position of the vacuum heater and the temperature change within 1 hour are displayed on the display screen. The controller 8 is connected to a communication module, which includes one or more of a serial communication module, an Ethernet communication module, a WIFI communication module, a Bluetooth communication module, and a 4G / 5G communication module.

[0034] The temperature detector is installed on the housing 1 and is used to detect the temperature change of the housing 1.

[0035] The controller 8 is connected to the thermocouple assembly, the power module, the temperature sensor and the temperature detector through connecting wires; the controller 8 performs calculations and judgments based on the signals transmitted from the sensor and the temperature detector to obtain an accurate judgment.

[0036] The heating cavity of the present invention is in a vacuum state to ensure the overall airtightness, and also adopts a heating coil for heating to ensure uniform internal heating, thereby achieving uniform heating of components such as photovoltaic substrates and carriers, and sealed heating can be ensured by a sealed door panel to ensure heating stability.

[0037] The present invention uses a temperature sensor and a thermocouple to measure temperature, and mutual verification can ensure the accuracy of measurement. Real-time display and data comparison are performed through a controller to ensure smooth operation of the heating cavity.

[0038] Example 2

[0039] A method for displaying the internal temperature of a vacuum heater, using the vacuum heater internal temperature detection system in Example 1, such as Figure 5 As shown, the steps are as follows: S1. Install multiple temperature sensors inside the heating cavity and install an infrared temperature detector on the outer shell.

[0040] S2. Open the sealed door panel, install the thermocouple assembly on the mounting hole of the sealed door panel, and match the thermocouple bracket with the temperature measuring hole on the carrier.

[0041] S3. There are no components on the carrier plate and the carrier platform. The controller controls the first control tube and the second control tube to energize the first heating coil and the second heating coil. After power-on, heat is generated. The temperature sensor, infrared temperature detector and two thermocouples respectively record the temperature changes inside the heating cavity and the temperature changes on the outer shell and the sealing door panel. This process is repeated three times and the average value is taken as a reference temperature characteristic point.

[0042] S4. Place the carrier board with components on the carrier, seal the door panels, and the thermocouple bracket reaches the specified position. Then turn on the power for heating. The display screen will display the temperature in real time and record the historical temperature changes. The controller will also compare the measured temperature with the reference temperature characteristic point: if the error does not exceed ±5°, it means that the operation is normal. If the error exceeds ±5°, it means that the operation is abnormal, and the display screen will show a reminder message.

[0043] Specifically, according to the nominal temperature T, the high temperature point temperature T H , low temperature point temperature T L Obtain the temperature uniformity characteristics of the welding machine hot plate.

[0044] For each temperature sensor, the temperature of all high temperature points T H, low temperature point temperature T L When the difference between the nominal temperature T is less than or equal to 5°, and the high temperature point temperature T H , low temperature point temperature T L The difference between the maximum and minimum values ​​is less than or equal to 5°, and the temperature of all high temperature points T H The average value of all low temperature points T L The deviation of the average value from the nominal temperature T is less than or equal to 5°, and the temperature of all high temperature points T H The standard deviation of all low temperature points T L When the standard deviation is less than or equal to 5°C, the temperature uniformity of the vacuum heater is qualified, otherwise its temperature uniformity is unqualified.

[0045] The present invention selects more measuring points inside the heating cavity, which increases the workload of measurement, and also increases the workload of data recording and processing, ensuring the accuracy of detection. At the same time, it also adds temperature change measurement on the shell, bringing greater guarantee for safe work.

[0046] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention invented herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not invented by the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.

[0047] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A vacuum heater internal temperature detection system, the vacuum heater comprising: shell; A heating cavity is disposed inside the shell; A sealing door plate, provided on the outer shell, for sealing the heating cavity; A heating device is arranged inside the heating cavity, comprising a heating bracket, the heating bracket is cylindrical, a heating coil assembly is wound around the heating bracket, a control tube assembly is installed on the housing, and the control tube assembly is electrically connected to the heating coil assembly; A carrier is arranged at the center of the heating bracket and is slidably mounted in the heating cavity; Characterized in that the internal temperature detection system comprises: A controller, disposed on the housing; A power module is used to connect an external power source and supply power to the entire detection system; A thermocouple assembly is mounted on the sealing door plate and the carrier; A plurality of temperature sensors are respectively mounted on the heating cavity and the carrier; A temperature detector, mounted on the housing, for detecting a temperature change of the housing; The controller is connected to the thermocouple assembly, the power module, the temperature sensor and the temperature detector through connecting wires; the controller performs calculations and judgments based on the signals transmitted from the sensor and the temperature detector to obtain an accurate judgment.

2. A vacuum heater internal temperature detection system according to claim 1, characterized in that: The controller adopts one of a single chip microcomputer and a PLC.

3. A vacuum heater internal temperature detection system according to claim 2, characterized in that: The thermocouple assembly includes a mounting hole that passes through the sealed door plate, and a connecting screw is installed on the mounting hole; the connecting screw is located outside the mounting hole and is provided with a plurality of sealing nuts; the connecting screw is located inside the sealed door plate and is provided with a plurality of sealing nuts; the inside of the connecting screw is installed on a thermocouple bracket, and a rigid thermocouple and a flexible thermocouple are respectively installed on the thermocouple bracket.

4. A vacuum heater internal temperature detection system according to claim 3, characterized in that: A carrier plate carrying components is placed on the carrier; a temperature measuring hole corresponding to a thermocouple bracket is provided between the carrier plate and the carrier.

5. A vacuum heater internal temperature detection system according to claim 4, characterized in that: The temperature detector is an infrared temperature detector, which is installed on the shell and is used to simultaneously detect the temperature of the shell and the sealed door panel.

6. A vacuum heater internal temperature detection system according to claim 1, characterized in that: The controller is also connected to a display module, and the display module is connected to a display screen, which displays the real-time temperature of each position of the vacuum heater and the temperature change within 1 hour.

7. A vacuum heater internal temperature detection system according to claim 1, characterized in that: The controller is connected to a communication module, and the communication module includes one or more of a serial communication module, an Ethernet communication module, a WIFI communication module, a Bluetooth communication module, and a 4G / 5G communication module.

8. A vacuum heater internal temperature detection system according to claim 1, characterized in that: The heating coil assembly is respectively provided with a first heating coil on the outside and a second heating coil on the inside; the control tube assembly includes a first control tube and a second control tube; the first control tube is electrically connected between the controller and the first heating coil, and the second control tube is electrically connected between the controller and the second heating coil.

9. A method for displaying the internal temperature of a vacuum heater, using the vacuum heater internal temperature detection system according to any one of claims 1 to 9, characterized in that: Here are the steps: S1. Install multiple temperature sensors inside the heating cavity and install an infrared temperature detector on the outer shell; S2. Open the sealed door panel, install the thermocouple assembly on the mounting hole of the sealed door panel, and match the thermocouple bracket with the temperature measuring hole on the carrier; S3, the carrier plate and the carrier are not loaded with components, the controller controls the first control tube and the second control tube to energize the first heating coil and the second heating coil, and heat is generated after power is turned on, and the temperature sensor, infrared temperature detector, and two thermocouples respectively record the temperature changes inside the heating cavity and the temperature changes of the outer shell and the sealing door plate; this process is repeated three times, and the average value is taken as a reference temperature characteristic point; S4. Place the carrier board with components on the carrier, seal the door panels, and the thermocouple bracket reaches the specified position. Then turn on the power for heating. The display screen will display the temperature in real time and record the historical temperature changes. The controller will also compare the measured temperature with the reference temperature characteristic point: if the error does not exceed ±5°, it means that the operation is normal. If the error exceeds ±5°, it means that the operation is abnormal, and the display screen will show a reminder message.

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