Drying oven with automatic protection mechanism and control system and method

Abstract

The invention relates to the technical field of drying ovens, and particularly discloses a drying oven with an automatic protection mechanism and a control system and method.The drying oven comprises an oven body used for drying materials through a built-in heating unit; a transparent separator; an isolation chamber is formed in the box body; an observation window is embedded in the transparent partition plate, and a flow guide cavity used for guiding dry hot air flow into the observation window is formed in the transparent partition plate. The heating circulation system is used for introducing dry hot air into the flow guide cavity and guiding out wet steam in the box body; the temperature sensor is used for collecting the temperature in the box body in real time; the camera shooting unit is arranged in the isolation chamber and used for collecting material appearance images in the drying process of the materials in the box body in real time; and the controller is in communication connection with the temperature sensor, the camera shooting unit, the heating circulation system and a start-stop switch of the heating unit. According to the invention, not only can the self-fusing protection be realized, but also the apparent change of the material in the drying process can be monitored.

Description

Technical Field

[0001] The present invention relates to the technical field of ovens, and in particular to an oven with an automatic protection mechanism and a control system and method. Background Art

[0002] Ovens are used for heating, drying, baking, and heat treatment, and are widely used in industrial production, laboratories, food processing, and other fields. Ovens can be divided into various types based on different usage requirements and operating principles, including electric ovens, hot air circulation ovens, vacuum ovens, UV ovens, and microwave ovens.

[0003] Currently, research into oven technology focuses on achieving precise temperature control, heating uniformity, and safety. For exploratory material drying, ovens are not only required to dry wet materials, but also to have process monitoring capabilities to observe surface changes during the drying process for subsequent material analysis. Existing ovens cannot meet these requirements. Summary of the Invention

[0004] The object of the present invention is to provide a drying oven and a control system and method with an automatic protection mechanism, which can not only realize self-fusing protection but also monitor the apparent changes of materials during the drying process.

[0005] The present invention is achieved through the following technical solutions: An oven with an automatic protection mechanism, comprising: The box is used to dry the material through its built-in heating unit; A transparent partition is provided in the box body to form an isolation chamber in the box body; an observation window is embedded in the transparent partition, and a guide cavity for introducing a dry hot air flow to the observation window is provided in the transparent partition; The heating circulation system is used to allow dry hot air to flow into the guide cavity and to remove wet steam from the box; Temperature sensor, used to collect the temperature inside the box in real time; The camera unit is installed in the isolation room and is used to collect the surface image of the material in the drying process in real time; The controller is communicatively connected with the temperature sensor, the camera unit, the heating circulation system and the start / stop switch of the heating unit.

[0006] The present invention can be understood as a structural improvement of an existing oven provided with a heating unit.

[0007] The transparent partition and observation window of the present invention are both made of transparent materials. Any transparent material that can isolate airflow and does not affect the shooting of the camera unit can be used; the temperature sensor, controller and camera unit used in the present invention are all existing technologies.

[0008] First, the present invention uses a temperature sensor and a controller to collect the temperature inside the oven in real time. When the temperature reaches a set threshold, the controller controls the start and stop switch of the heating unit to turn off and automatically fuse, thereby realizing automatic protection of the oven.

[0009] Secondly, in order to monitor the apparent changes of materials during the drying process, the present invention is achieved by arranging a camera unit in the box that is communicatively connected to the controller, wherein the camera unit can not only be used to collect real-time surface images of materials during the drying process of materials in the box to monitor the real-time effects of the material drying process, but the camera unit can also generate time-lapse video to assist in the analysis of changes in the material drying process.

[0010] Thirdly, the present invention takes into account that in the process of drying wet materials in the oven, especially when the oven is used to dry materials with high humidity, the humidity in the oven will be relatively high. If the camera unit is placed directly in the oven, its service life will be shortened, and fog will be generated on the surface of the materials and even in the oven, which is not conducive to the camera unit to take clear pictures. Therefore, the present invention provides a transparent partition to form an isolation chamber for placing the camera unit between the transparent partition and the side wall of the oven to avoid the influence of moisture in the oven on the camera unit; and in order to ensure the clarity of the image taken by the camera unit, the present invention provides a heating cycle that cooperates with each other The system is provided with a transparent partition, and an observation window is provided on the transparent partition; on the one hand, the heating circulation system forms a circulation loop with the oven, which not only brings the wet steam generated by the heating in the oven out of the oven to reduce the wet steam in the box body, thereby reducing the influence of the wet steam on the shooting clarity of the camera unit; on the other hand, the heating circulation system can provide a dry hot air flow for the guide cavity. Since an observation window is provided on the transparent partition, the dry hot air flow is introduced from the guide cavity to the observation window. The temperature and flow rate of the dry hot air flow are utilized to ensure that the observation window is always in a dry state, thereby avoiding the problem of reduced shooting clarity of the camera unit caused by fogging on the observation window.

[0011] In a preferred embodiment, the observation window includes: The mounting portion is sealed and connected to the transparent partition, and the mounting portion is arranged close to the isolation chamber; The guide part is a truncated cone structure, the large end of the truncated cone structure is connected to the mounting part, an annular diversion gap is formed between the outer wall of the guide part and the transparent partition, and the annular diversion gap is connected to the guide cavity.

[0012] The observation window set up as above in the present invention can not only realize the introduction of dry hot air flow into the observation window, but also realize the introduction of dry hot air flow from all sides of the guide part. The dry hot air flows in all directions generate disturbances when they come into contact, thereby increasing the flow rate here. It can not only further avoid fogging of the observation window, but also accelerate the dispersion of the wet air flow here in the box, so as to reduce the influence of moisture around the material on the shooting clarity of the camera unit. Since the present invention can be used for analysis of the material drying process by local shooting of the material at a certain place in the box, it can ensure that the wet steam around the material at a certain place in the box has no effect. Because the properties of the materials are the same and the materials are more uniform during the drying process, all materials can be represented by local apparent changes.

[0013] In a preferred embodiment, the width of the annular diversion gap gradually decreases from the large end to the small end of the guide portion.

[0014] In a preferred embodiment, the flow guide cavity has an annular outlet that cooperates with the flow guide portion; the oven further comprises: The flow distribution piece is used to block the annular outlet, and the flow distribution piece includes an annular flow blocking piece, on which a first radial channel and a second radial channel are provided for connecting the guide cavity and the annular diversion gap; the dry hot air flow guided out by the first radial channel flows toward the outer wall of the guide part, and the dry hot air flow guided out by the second radial channel flows toward the small end face of the frustum structure.

[0015] The flow distribution member provided in the present invention can reasonably distribute the dry hot air flow at the outlet of the guide cavity, ensuring that the dry hot air flow can flow evenly on the surface of the observation window, thereby improving the drying effect of the dry hot air flow on the observation window.

[0016] In a preferred embodiment, one side of the inner wall of the annular flow blocker contacts the outer wall of the mounting portion, and the mounting portion is used to limit the radial displacement of the distribution member; a limit plate is provided on the outer wall of the annular flow blocker, and the limit plate is placed in the guide cavity, and the limit plate is used to limit the axial displacement of the distribution member; An axial channel for communicating the first radial channel and the second radial channel is provided in the annular flow blocking member.

[0017] In a preferred embodiment, the width of the second radial channel decreases gradually from the outside to the inside.

[0018] In a preferred embodiment, the oven further comprises: The water absorption component is arranged opposite to the transparent partition. The water absorption component is filled with water absorption filler. An exhaust channel connected to the heating circulation system is formed between the water absorption component and the side wall of the box.

[0019] The water absorption component of the present invention has the function of absorbing wet steam. The water absorption component is arranged opposite to the transparent partition, so that the wet steam in the box can quickly flow to the side of the water absorption component, greatly reducing the wet steam content on the side of the transparent partition, which can help improve the shooting clarity of the camera unit; the wet steam absorbed by the water absorption component is quickly discharged from the box through the exhaust channel to reduce the overall wet steam content in the box.

[0020] In a preferred embodiment, a one-way breathable membrane is provided at the front end of the water absorbing component, which can prevent the wet steam absorbed by the water absorbing component from returning to the box body, thereby improving the effect of the water absorbing component in absorbing wet steam.

[0021] In a preferred embodiment, the camera unit includes a first camera and a second camera; The height of the second camera corresponds to the observation window and is used to collect real-time surface images of the materials in the drying process inside the box; The first camera is arranged above the second camera and is used to collect infrared data inside the box in real time.

[0022] In a preferred embodiment, the heating circulation system includes a heating mechanism, a first dryer, a second dryer, an exhaust pipe, an air inlet pipe, and a branch pipe; The air inlet end and the air outlet end of the heating mechanism are connected to the exhaust pipe and the air inlet pipe respectively; The first dryer and the second dryer are respectively arranged on the exhaust pipe and the intake pipe; The exhaust pipe is connected with the box body; The air intake pipe is communicated with the guide cavity; One end of the branch pipe is connected to the air inlet pipe, and the other end is communicated with the box body.

[0023] The heating circulation system of the present invention can not only realize the extraction of wet steam in the box body and then introduce it into the observation window as a dry hot air flow after drying and heating to avoid fogging of the observation window; and the heating circulation system introduces the dry hot air flow into the box body through a branch pipe, which can not only assist the heating unit to realize the drying process of the material, but also accelerate the flow of the air flow in the box body and improve the uniformity of the material drying.

[0024] A control system for an oven, comprising: Temperature sensor, used to collect the temperature inside the box in real time; The camera unit includes a first camera and a second camera; the second camera is used to collect real-time surface images of the material in the drying process in the box; the first camera is used to collect real-time infrared data in the box; The controller is used to receive the temperature collected by the temperature sensor and determine whether to turn off the start / stop switch of the heating unit; and is used to receive the material surface image collected by the second camera; a fire prediction module, configured to receive infrared data collected by the first camera and the temperature collected by the temperature sensor, calculate an abnormal value based on the infrared data collected by the first camera and the temperature collected by the temperature sensor, and transmit the output abnormal value to the controller; The valve group is arranged on the pipeline of the heating circulation system, and the controller controls the valve group to adjust the flow of the dry hot air flow; The alarm unit is connected to the controller for communication and receives instructions from the controller to perform self-fuse alarm and fire warning.

[0025] The control system of the present invention can not only realize the self-fusing protection of the oven, but also realize fire early warning through the provided fire prediction module.

[0026] In a preferred embodiment, an oxygen concentration sensor and a humidity sensor are further provided in the box; the oxygen concentration sensor and the humidity sensor are used to detect the oxygen concentration and humidity in the box, respectively.

[0027] The control method based on the above control system includes the following steps: The temperature sensor collects the temperature inside the box in real time and transmits it to the controller, which determines whether the temperature reaches the alarm threshold. If the alarm threshold is reached, the start and stop switch of the heating unit is controlled to be turned off to achieve self-fusing, and the alarm unit is controlled to issue a self-fusing alarm. The temperature sensor collects the temperature inside the box in real time and transmits it to the fire prediction module. The first camera collects the temperature inside the box in real time and transmits it to the fire prediction module for abnormal value calculation. The fire prediction module transmits the output abnormal value to the controller for fire prediction, and the controller determines whether to issue a fire warning instruction. The second camera collects the material surface image during the drying process in the box in real time and transmits it to the controller. The controller determines whether to adjust the opening of the valve group based on the clarity of the material surface image.

[0028] The alarm threshold of the present invention is the upper limit of the heating temperature setting. The alarm threshold is determined according to the heating characteristics of the material itself. When the drying temperature exceeds the alarm threshold, the physical and chemical properties of the material will be affected or burned.

[0029] The alarm threshold can be the upper temperature limit at which the material produces uncontrollable property changes, or the alarm threshold can be obtained by dynamic calculation based on the ignition point of the dried object. When the dried object will not produce uncontrollable property changes before the ignition point, the alarm threshold is obtained by dynamic calculation based on the ignition point of the dried object. This can avoid the need to adjust the alarm threshold individually each time.

[0030] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention provides a temperature sensor and a camera unit that are communicatively connected to a controller in a box body, and provides a transparent partition with an embedded observation window. An isolation chamber for placing the camera unit is formed between the transparent partition and the side wall of the box body to protect the camera unit. In addition, by providing a guide cavity and a heating circulation system in the transparent partition, the wet steam in the box body can be reduced as much as possible and the fogging of the observation window can be avoided, thereby ensuring the clarity of the camera unit's photography. The temperature sensor and the controller are used in combination to achieve automatic fuse protection of the oven. The camera unit and the controller are used in combination to monitor the apparent changes of the material during the drying process.

[0031] 2. The present invention provides a transparent partition and a water absorption component that are arranged opposite to each other in the box body, and utilizes the function of the water absorption component to absorb wet steam, so as to quickly absorb the wet steam in the box body to one side of the water absorption component, thereby reducing the impact of the wet steam on the observation window and further ensuring the clarity of the shooting of the camera unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 It is a structural schematic diagram of the oven of the present invention; Figure 2 This is a schematic diagram of an observation window installed on a transparent partition; Figure 3 It is a structural diagram of the observation window; Figure 4 for Figure 1 A partial enlarged view of point A in the middle; Figure 5 The figure is a schematic diagram of the airflow direction when the transparent partition does not use a distribution piece; Figure 6 It is a logic block diagram of the control system of the present invention.

[0033] Markings and corresponding parts names in the accompanying drawings: 1-Box; 2-Heating circulation system; 3-Transparent partition; 4-Observation window; 5-Distributor; 6-Annular diversion gap; 7-One-way breathable membrane; 8-Water absorption component; 9-First camera; 10-Second camera; 11-First cavity; 12-Drying cavity; 13-Isolation chamber; 14-Exhaust channel; 21-Heating mechanism; 22-First dryer; 23-Second dryer; 24-Exhaust pipe; 25-Inlet pipe; 26-Branch pipe; 31-Guide cavity; 32-Inlet channel; 33-Sealing ring; 41-Mounting part; 42-Guide part; 43-Annular groove; 51-Annular flow blocking part; 52-Limiting plate; 53-First radial channel; 54-Axial channel; 55-Second radial channel; 100-Placement rack. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the examples. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention. The embodiments described below are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that these specific details are not necessarily required to practice the present invention. In other examples, well-known structures, materials, or methods are not specifically described to avoid obscuring the present invention. The materials, instruments, and reagents used in the following examples, unless otherwise specified, are commercially available. The techniques used in the examples, unless otherwise specified, are conventional techniques well known to those skilled in the art.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0037] Example 1: The existing drying oven does not have the function of monitoring the surface changes of materials during the drying process. In order to solve this problem, Figure 1-Figure 5 As shown, this embodiment provides an oven with an automatic protection mechanism, comprising: The box body 1 is used to dry the material through its built-in heating unit; wherein the heating unit can be an electric heating element (such as a resistance wire) that generates heat when energized; one specific structure of the box body 1 in this embodiment is: the internal space of the box body 1 is divided from top to bottom by two horizontal partitions in the box body 1 to form a first cavity 11, a drying cavity 12 and a heating chamber, wherein the heating unit is placed in the heating chamber, and the material in the drying cavity 12 is dried by generating heat when energized. In actual use, a placement rack 100 for placing materials is placed in the drying cavity 12; wherein the first cavity 11 and the heating chamber are both closed structures, one side of the drying cavity 12 is an open end, and a door is provided at its open end, and the opening and closing of the drying cavity 12 are achieved by opening and closing the door.

[0038] A transparent partition 3 is disposed within the housing 1 to form an isolation chamber 13 therein. An observation window 4 is embedded in the transparent partition 3, and a guide cavity 31 is provided within the transparent partition 3 for directing a dry, hot air flow toward the observation window 4. Both the transparent partition 3 and the observation window 4 are made of a transparent material, specifically transparent glass, preferably optical glass. Preferably, the observation window 4 can be an anti-fog window, which itself has a certain anti-fog effect. In actual use, the transparent partition 3 can be formed by combining several pieces of transparent glass.

[0039] In a preferred embodiment, in order to improve the heating and drying effect of the hot dry air flow from the guide cavity 31 on the observation window 4, as shown in FIG. Figure 2 As shown, a circular groove is provided on the transparent partition 3, and the observation window 4 is detachably connected to the circular groove. The observation window 4 is placed inside the guide cavity 31, and the guide cavity 31 uniformly introduces dry hot air flow to the outer wall of the observation window 4. A specific implementation method can be that the guide cavity 31 has an annular outlet, which is arranged outside the observation window 4, and an air inlet channel 32 is provided at the top of the guide cavity 31. Preferably, in order to reduce the risk of fogging of the transparent partition 3, the guide cavity 31 has a larger width, which is greater than the diameter of the circular groove. The width of the guide cavity 31 is Figure 2 horizontal direction.

[0040] In a preferred case, Figure 3 、 Figure 5 As shown, the observation window 4 includes a mounting portion 41 and a guide portion 42, wherein the mounting portion 41 is sealed with the transparent partition 3, specifically, an annular groove 43 is provided on the outer wall of the mounting portion 41, and an annular groove matching the annular groove 43 is provided on the inner wall of the outer side wall of the annular outlet of the guide cavity 31, and a sealing ring 33 is provided between the annular groove and the annular groove 43, wherein the outer side wall of the annular outlet of the guide cavity 31 refers to Figure 5 The vertical side wall of the isolation chamber 13 is close to the middle part; and the mounting portion 41 is arranged close to the isolation chamber 13; the guide portion 42 is a truncated cone structure, the large end of the truncated cone structure is connected to the mounting portion 41, and an annular diversion gap 6 is formed between the outer wall of the guide portion 42 and the transparent partition 3, and the annular diversion gap 6 is connected to the guide cavity 31; the width of the annular diversion gap 6 tends to gradually decrease from the large end to the small end of the guide portion 42. In this case, the flow direction of the dry hot air flow is as follows: the dry hot air flow in the guide cavity 31 is discharged from its annular outlet and enters the annular diversion gap 6. Part of the dry hot air flow entering the annular diversion gap 6 flows along the side wall of the guide portion 42, and part of it can continue to flow to the small end face of the guide portion 42 to achieve heating and drying of the observation window 4. Due to the upward movement of the air flow and the change in the width of the annular diversion gap 6, a part of the dry hot air flow entering the annular diversion gap 6 will move rapidly to the right and upward.

[0041] The heating circulation system 2 is used to allow a dry hot air flow to be introduced into the guide chamber 31 and to guide out the wet steam in the housing 1. During specific implementation, the heating circulation system 2 is placed in the first cavity 11. A preferred structure of the heating circulation system 2 is as follows: it includes a heating mechanism 21, a first dryer 22, a second dryer 23, an exhaust pipe 24, an air inlet pipe 25 and a branch pipe 26; the air inlet end and the air outlet end of the heating mechanism 21 are connected to the exhaust pipe 24 and the air inlet pipe 25 respectively; the first dryer 22 and the second dryer 23 are respectively arranged on the exhaust pipe 24 and the air inlet pipe 25; the exhaust pipe 24 is connected to the interior of the housing 1, specifically to the drying chamber 12 in the housing 1, and the wet steam in the drying chamber 12 is guided out of the housing 1 through the exhaust pipe 24 and is dried and heated for reuse in sequence; the air inlet pipe 25 is connected to the air inlet channel 32 at the top of the guide chamber 31; one end of the branch pipe 26 is connected to the air inlet pipe 25, and the other end is connected to the drying chamber 12 in the housing 1. The heating circulation system 2 of this embodiment can also provide a dry hot air flow to the drying chamber 12, accelerate airflow disturbance, and assist in drying the material. The air circulation process is as follows: the wet steam generated by the material to be dried in the drying chamber 12 enters through the exhaust pipe 24, passes through the first dryer 22, the heating mechanism 21, and the second dryer 23 in sequence for drying, heating, and drying to obtain dry gas with a certain temperature. The dry gas is divided into two paths at the outlet section of the second dryer 23. One path enters the guide chamber 31 through the air inlet pipe 25 to heat and dry the observation window 4, and the other path enters the drying chamber 12 through the branch pipe 26 to dry the material to be dried.

[0042] The temperature sensor is used to collect the temperature inside the box 1 in real time; in specific implementation, the temperature sensor can be installed in the drying chamber 12.

[0043] A camera unit, located within isolation chamber 13, is used to capture real-time images of the material surface during the drying process within chamber 1. In a preferred embodiment, the camera unit includes a first camera 9 and a second camera 10. The second camera 10 is positioned at a height corresponding to observation window 4 and is used to capture real-time images of the material surface during the drying process within chamber 1. Preferably, two second cameras 10 are provided: one for capturing the material surface image and one for generating a time-lapse video. The first camera 9 is located above the second camera 10 and is used to capture infrared data from within chamber 1 in real time.

[0044] The controller is connected to the temperature sensor, the camera unit, the heating circulation system 2 and the start / stop switch of the heating unit to realize automatic control of the oven.

[0045] In this embodiment, a temperature sensor and a camera unit that are communicatively connected to the controller are arranged in the box body 1, and a transparent partition 3 with an embedded observation window 4 is arranged. An isolation chamber 13 for placing the camera unit is formed between the transparent partition 3 and the side wall of the box body 1 to protect the camera unit. By arranging a guide cavity 31 and a heating circulation system 2 in the transparent partition 3, the wet steam in the box body 1 can be reduced as much as possible and the observation window 4 can be prevented from fogging, thereby ensuring the clarity of the camera unit's photography. The temperature sensor and the controller are used in combination to achieve automatic fuse protection of the oven. The camera unit and the controller are used in combination to monitor the apparent changes of the material during the drying process.

[0046] Example 2: In order to improve the heating and drying effect of the observation window 4, the present embodiment Figure 4 As shown, the oven also includes: The distribution member 5 is used to block the annular outlet, and the distribution member 5 includes an annular baffle 51, on which a first radial channel 53 and a second radial channel 55 are provided for connecting the guide cavity 31 and the annular diversion gap 6; the dry hot air flow guided by the first radial channel 53 flows toward the outer wall of the guide portion 42, and the dry hot air flow guided by the second radial channel 55 flows toward the small end face of the frustum structure.

[0047] In this embodiment, the flow direction of the dry hot air flow is: a part of the dry hot air flow in the guide chamber 31 is introduced into the outer wall of the guide part 42 through the first radial channel 53, and a part is introduced into the small end face of the frustum structure through the second radial channel 55; the dry hot air flow introduced into the outer wall of the guide part 42 enters the small end face of the frustum structure along the outer wall of the guide part 42, and a part moves rightward and upward toward the drying chamber 12 as the width of the annular diversion gap 6 changes. This part of the air flow collides with the air flow derived from the second radial channel 55 to form a vortex, which reduces the speed of the air flow moving rightward and upward toward the drying chamber 12, so that part of the air flow enters the small end face of the frustum structure, that is, the flow distribution part 5 is provided compared with the solution in Example 1 in which the flow distribution part 5 is not provided. Not only will there be more dry hot air flow to dry and heat the observation window 4, but it can also improve the turbulence effect, accelerate the air flow at the turbulence point, reduce the fog on the surface of the material here, and improve the shooting effect of the camera unit.

[0048] In a preferred case, one side of the inner wall of the annular baffle 51 contacts the outer wall of the mounting portion 41, and the mounting portion 41 is used to limit the radial displacement of the distribution member 5; a limiting plate 52 is provided on the outer wall of the annular baffle 51, and the limiting plate 52 is placed in the guide cavity 31, and the limiting plate 52 is used to limit the axial displacement of the distribution member 5, wherein the limiting plate 52 can be an annular plate, or it can be composed of multiple arc blocks on the same circumference; this embodiment uses the combined action of the limiting plate 52 and the mounting portion 41 to achieve the fixing of the distribution member 5 at the annular outlet of the guide cavity 31.

[0049] An axial channel 54 is provided within the annular flow blocker 51 for connecting the first radial channel 53 and the second radial channel 55. Specifically, the first radial channel 53 directly connects the flow guide cavity 31 and the annular diverter gap 6. The inner end of the second radial channel 55 connects to the annular diverter gap 6, while the outer end is closed and connects to the first radial channel 53 via the axial channel 54. This arrangement increases the axial gap between the first radial channel 53 and the second radial channel 55, ensuring that the airflow from the outlet of the second radial channel 55 is directed to the small end face of the frustum structure, ensuring that more dry hot airflow is directed to the small end face of the frustum structure, thereby improving the heating effect on the observation window 4. Preferably, the width of the second radial channel 55 gradually decreases from the outside to the inside, which helps to increase the velocity of the airflow at the outlet of the second radial channel 55 and enhance the turbulence effect.

[0050] Example 3: In order to further improve the clarity of the camera unit, Figure 1 As shown, the oven also includes: The water absorption component 8 is arranged opposite to the transparent partition 3. The water absorption component 8 is filled with water absorption filler, which can be silica gel or activated carbon, etc. An exhaust channel 14 connected to the heating circulation system 2 is formed between the water absorption component 8 and the side wall of the box body 1.

[0051] In a preferred embodiment, a one-way breathable membrane 7 is provided at the front end of the water absorbing component 8 .

[0052] The water absorption component 8 of this embodiment has the function of absorbing wet steam. The water absorption component 8 is arranged opposite to the transparent partition 3, so that the wet steam in the box body 1 can quickly flow to the side of the water absorption component 8, greatly reducing the wet steam content on the side of the transparent partition 3, which can help improve the shooting clarity of the camera unit.

[0053] Example 4: like Figure 6 As shown, a control system for the oven of any one of Examples 1-3 includes: A temperature sensor is used to collect the temperature inside the box 1 in real time; The camera unit includes a first camera 9 and a second camera 10; the second camera 10 is used to collect the surface image of the material in the drying process in the box 1 in real time; the first camera is an infrared camera, which is used to collect infrared data in the box 1 in real time; The controller is used to receive the temperature collected by the temperature sensor and determine whether to turn off the start / stop switch of the heating unit; and is used to receive the material surface image collected by the second camera 10; a fire prediction module, configured to receive the infrared data collected by the first camera 9 and the temperature collected by the temperature sensor, calculate an abnormal value based on the infrared data collected by the first camera 9 and the temperature collected by the temperature sensor, and transmit the output abnormal value to the controller; The valve group is arranged on the pipeline of the heating circulation system 2, and the controller controls the valve group to adjust the flow of the dry hot air flow; The alarm unit is connected to the controller for communication and receives instructions from the controller to perform self-fuse alarm and fire warning.

[0054] The control method of this embodiment includes the following steps: The temperature inside the box 1 is collected in real time by a temperature sensor and transmitted to the controller, which determines whether the temperature has reached the alarm threshold. If the alarm threshold is reached, the start / stop switch of the heating unit is controlled to be turned off to achieve self-fusing, and the alarm unit is controlled to issue a self-fusing alarm. The alarm threshold can be the ignition point of the dried object, or the alarm threshold can be the upper temperature limit at which the material produces uncontrollable changes in properties. The uncontrollable changes in properties here refer to the drying temperature not reaching the ignition point, but the drying temperature can cause essential changes in the dried material, such as protein denaturation and serious deformation of wool at around 40°C. In specific implementation, the controller stores ignition point models corresponding to different drying materials and temperature upper limit models corresponding to different drying materials. The ignition point model is understood as a table that records the ignition points corresponding to different materials. Similarly, the temperature upper limit model is understood as a table that records the temperature upper limits that produce uncontrollable changes in properties corresponding to different materials. When the dried material is determined, whether it will have uncontrollable property changes is determined; for example: when the dried material is marked as not producing uncontrollable property changes, the ignition point model is used to determine whether the alarm threshold is reached; when the dried material is marked as producing uncontrollable property changes, the temperature upper limit model is used to determine whether the alarm threshold is reached.

[0055] The temperature inside the box 1 is collected by the temperature sensor in real time and transmitted to the fire prediction module. The first camera 9 collects the infrared data inside the box 1 in real time and transmits it to the fire prediction module for abnormal value calculation; and the output abnormal value is transmitted to the controller, which determines whether to issue a fire warning instruction.

[0056] The acquisition process of the fire prediction module is as follows: The temperature and infrared data generated when the material reaches the ignition point are obtained as training samples, and the temperature and infrared data to be trained are subjected to model training based on deep learning to obtain a trained model. The existing technology of the model used for training can be a CNN model or an RNN model. In specific implementation, an abnormal threshold can be set in the controller, and the temperature and infrared data collected in the box 1 are transmitted to the fire prediction module. The trained model in the fire prediction module outputs an abnormal value, and the output abnormal value is transmitted to the controller. When the abnormal value reaches the abnormal threshold, the controller issues a fire warning instruction to alarm. The abnormal threshold can be obtained based on experience.

[0057] This embodiment uses temperature and infrared data as model inputs based on the following considerations: Under normal circumstances, the oven contains oxygen and is not an oxygen-free environment. Oxygen and the ignition point are necessary conditions for material combustion. Therefore, temperature can be directly considered as input when predicting fires in the oven. Different materials have different ignition points. Temperature is used to determine whether the material has reached its ignition point. Multiple infrared data can form an infrared image. When the material is burning, the infrared image is different. Therefore, this embodiment can achieve fire prediction using temperature sensors and infrared images.

[0058] In a preferred case, an oxygen concentration sensor and a humidity sensor can also be set in the oven. The oxygen concentration sensor and the humidity sensor are respectively used to detect the oxygen concentration and humidity in the box 1 to obtain the temperature, infrared data, oxygen concentration and humidity generated when the material reaches the ignition point as training samples. Based on deep learning, the model training of the temperature, infrared data, oxygen concentration and humidity to be trained is performed to obtain a trained model. During specific implementation, the temperature, infrared data, oxygen concentration and humidity collected in the box 1 are transmitted to the fire prediction module, and the trained model in the fire prediction module outputs an abnormal value, and the output abnormal value is transmitted to the controller.

[0059] The second camera 10 collects the material surface image during the drying process in the box 1 in real time and transmits it to the controller. The controller determines whether to adjust the opening of the valve group based on the clarity of the material surface image. The clarity here refers to the field of view obstruction range. When the fog on the glass window 4 blocks the shooting field of view of the second camera 10 and the field of view obstruction range reaches the set field of view obstruction threshold, the controller controls the valve group to increase the opening to allow more dry hot air flow to dry the glass window 4.

[0060] In a specific embodiment, the control system further includes a remote terminal, which may be a mobile phone or a computer, etc., for the staff to timely observe the process of drying materials in the oven.

[0061] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0062] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

Claims

1. An oven with an automatic protection mechanism, characterized in that: include: The box (1) is used to dry the material through its built-in heating unit; A transparent partition (3); arranged in the box body (1) so as to form an isolation chamber (13) in the box body (1); an observation window (4) is embedded in the transparent partition (3), and a guide cavity (31) is provided in the transparent partition (3) for introducing a dry hot air flow toward the observation window (4); A heating circulation system (2) is used to allow the dry hot air flow to enter the guide cavity (31) and to guide the wet steam out of the box (1); A temperature sensor for collecting the temperature inside the box (1) in real time; A camera unit is provided in the isolation chamber (13) and is used to capture in real time the surface image of the material in the box (1) during the drying process; A controller is communicatively connected with the temperature sensor, the camera unit, the heating circulation system (2) and the start / stop switch of the heating unit.

2. The oven with an automatic protection mechanism according to claim 1, characterized in that: The observation window (4) comprises: A mounting portion (41) is sealed and connected to the transparent partition (3), and the mounting portion (41) is arranged close to the isolation chamber (13); The guide portion (42) is a truncated cone structure, the large end of the truncated cone structure is connected to the mounting portion (41), an annular diversion gap (6) is formed between the outer wall of the guide portion (42) and the transparent partition (3), and the annular diversion gap (6) is connected to the guide cavity (31).

3. The oven with automatic protection mechanism according to claim 2, characterized in that: The width of the annular diversion gap (6) tends to gradually decrease from the large end to the small end of the guide portion (42).

4. The oven with an automatic protection mechanism according to claim 2, characterized in that: The guide cavity (31) has an annular outlet that cooperates with the guide portion (42); the oven further comprises: A distribution piece (5) is used to block the annular outlet, and the distribution piece (5) includes an annular flow blocking piece (51), and the annular flow blocking piece (51) is provided with a first radial channel (53) and a second radial channel (55) for connecting the guide cavity (31) and the annular diversion gap (6); the dry hot air flow guided by the first radial channel (53) flows toward the outer wall of the guide portion (42), and the dry hot air flow guided by the second radial channel (55) flows toward the small end face of the truncated cone structure.

5. The oven with automatic protection mechanism according to claim 4, characterized in that: One side of the inner wall of the annular flow-blocking member (51) contacts the outer wall of the mounting portion (41), and the mounting portion (41) is used to limit the radial displacement of the distribution member (5); a limiting plate (52) is provided on the outer wall of the annular flow-blocking member (51), and the limiting plate (52) is placed in the guide cavity (31), and the limiting plate (52) is used to limit the axial displacement of the distribution member (5); An axial channel (54) for connecting the first radial channel (53) and the second radial channel (55) is provided in the annular flow blocking member (51).

6. The oven with automatic protection mechanism according to claim 5, characterized in that: The width of the second radial channel (55) decreases gradually from the outside to the inside.

7. The oven with an automatic protection mechanism according to claim 1, characterized in that: The oven also includes: A water absorption component (8) is arranged opposite to the transparent partition (3), the water absorption component (8) is filled with water absorption filler, and an exhaust channel (14) communicating with the heating circulation system (2) is formed between the water absorption component (8) and the side wall of the box (1).

8. The oven with automatic protection mechanism according to claim 7, characterized in that: A one-way breathable membrane (7) is provided at the front end of the water absorption component (8).

9. The oven with an automatic protection mechanism according to claim 1, characterized in that: The camera unit comprises a first camera (9) and a second camera (10); The second camera (10) is at a height corresponding to the observation window (4) and is used to collect real-time surface images of the material in the box (1) during the drying process; The first camera (9) is arranged above the second camera (10) and is used to collect infrared data inside the box (1) in real time.

10. The oven with automatic protection mechanism according to claim 1, characterized in that: The heating circulation system (2) includes a heating mechanism (21), a first dryer (22), a second dryer (23), an exhaust pipe (24), an air intake pipe (25), and a branch pipe (26); The air inlet end and the air outlet end of the heating mechanism (21) are respectively connected to the exhaust pipe (24) and the air inlet pipe (25); The first dryer (22) and the second dryer (23) are respectively arranged on the exhaust pipe (24) and the intake pipe (25); The exhaust pipe (24) is in communication with the interior of the box (1); The air inlet pipe (25) is in communication with the flow guide cavity (31); One end of the branch pipe (26) is connected to the air inlet pipe (25), and the other end is communicated with the inside of the box (1).

11. A control system for the oven according to any one of claims 1 to 10, characterized in that: include: A temperature sensor for collecting the temperature inside the box (1) in real time; The camera unit comprises a first camera (9) and a second camera (10); the second camera (10) is used to collect in real time the surface image of the material in the box (1) during the drying process; the first camera (9) is configured to collect in real time infrared data in the box (1); A controller, configured to receive the temperature collected by the temperature sensor and determine whether to turn off the start / stop switch of the heating unit; Used to receive the material surface image captured by the second camera (10); a fire prediction module, configured to receive the infrared data collected by the first camera (9) and the temperature collected by the temperature sensor, calculate an abnormal value based on the infrared data collected by the first camera (9) and the temperature collected by the temperature sensor, and transmit the output abnormal value to a controller; A valve group is arranged on the pipeline of the heating circulation system (2), and the controller controls the valve group to adjust the flow rate of the dry hot air flow; The alarm unit is connected to the controller for communication and receives instructions from the controller to generate self-fuse alarm and fire warning.

12. The control system according to claim 11, characterized in that: An oxygen concentration sensor and a humidity sensor are also provided in the box (1); the oxygen concentration sensor and the humidity sensor are used to detect the oxygen concentration and humidity in the box (1), respectively.

13. A control method based on the control system according to claim 11 or 12, characterized in that: The following steps are involved: The temperature sensor collects the temperature inside the box (1) in real time and transmits it to the controller, which determines whether the temperature reaches an alarm threshold. If the alarm threshold is reached, the start / stop switch of the heating unit is controlled to be turned off to achieve self-fusing, and the alarm unit is controlled to issue a self-fusing alarm. The temperature sensor collects the temperature inside the box (1) in real time and transmits it to the fire prediction module. The first camera (9) collects infrared data inside the box (1) in real time and transmits it to the fire prediction module for abnormal value calculation. The fire prediction module transmits the output abnormal value to the controller for fire prediction, and the controller determines whether to issue a fire warning instruction. The second camera (10) collects in real time the surface image of the material in the box (1) during the drying process and transmits it to the controller, which determines whether to adjust the opening of the valve group based on the clarity of the surface image of the material.

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