A temperature-controllable baking device

Abstract

The present invention discloses a temperature-controllable baking device, comprising: a box, a plurality of independent baking units, a room temperature air intake channel, a temperature-increasing air intake channel, a temperature-reducing exhaust channel, and an electric control unit connected to the independent baking units, wherein: the electric control unit controls the circulating air volume and the baking temperature in each independent baking unit by controlling the switch combination of the first switch, the second switch, or the third switch respectively according to the stored set baking mode and the sensing signal fed back by the sensing component. The temperature-controllable baking device of the present invention can improve the baking efficiency and realize precise temperature control; the structure is compact and intensive, the layout space is saved, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of automobile manufacturing, and in particular to a temperature-controllable baking device. Background Art

[0002] In the prior art, the spraying process of conventional coating laboratories will simulate the spraying production line as much as possible. The simulation method of the leveling section is to set a transfer window between the spraying area and the baking area in separate partitions; install two sliding windows on both sides of the spraying area and the baking area, and install an exhaust duct on the top of the window to remove volatile gases; after the spraying operation is completed in the spraying area, the sprayed test board is placed in the transfer window to complete the leveling at room temperature, and the window on one side is opened when taking and placing the board, and the window is closed after taking and placing. However, if the window is completely closed, negative pressure will be formed due to the operation of the exhaust facilities, and if the window is highly closed, it will become difficult to open the closed window. Therefore, only by leaving some space between the window and the window frame can the air pressure inside and outside the window be relatively balanced, but it is difficult to control it just right. If the gap is large, the volatile gas will leak out during the drying process of the test board. If the gap is small, there will be negative pressure in the window, which is very easy to form a cyclone and roll up floating dust to pollute the board surface.

[0003] If the window is not airtight, air will form an intake vortex in the window gap, rolling up dust to pollute the board surface; and, in the actual experimental stage, the laboratory and the oven are shared by all experimenters, and the transfer window is often blocked between the spraying area and the baking area like a bottleneck (there is usually only one transfer window); for the overall efficiency of the laboratory, many test boards are forced to be taken away and moved to the baking area before the leveling time is sufficient to make room for the test boards waiting to be dried, that is, the leveling time is not guaranteed.

[0004] The traditional operation method fails to achieve the directional extraction of volatile steam in a relatively closed space during the transfer process of the room temperature leveling section of the test board. Even if the transfer window mentioned above is placed, it is very easy to pollute the working environment, and the appearance of the board surface is difficult to guarantee.

[0005] In summary, the existing baking devices mainly have the following technical defects:

[0006] 1. When test panels of multiple schemes are baked in the same oven, the process of opening the oven door to put the test panel behind will cause heat loss, affecting the set baking conditions of the test panel being baked, resulting in deviation in the test results; there are still a large number of toxic and harmful gases released by the test coating in the oven after the test panel is baked. If there is no gas extraction process before opening the oven door, it will cause pollution to the environment when opening the door. In serious cases, the eyes and throat of the operator will be damaged at the moment of opening the oven door. If the inhaled gas is excessive, it may even cause short-term or long-term damage to the nervous system.

[0007] 2. If the next test plan is started after the complete baking process of a test plan is completed, it will seriously affect the overall test progress of the test team and waste oven resources; if more ovens are purchased in order not to affect the overall test progress of the test team, the test site needs to be expanded and the equipment investment needs to be increased; after the previous baking plan is completed, the residual temperature of the oven is usually still relatively high. If the subsequent test board is put in immediately, the starting temperature of the baking will be too high, which is inconsistent with the set baking conditions, resulting in coating defects and inaccurate performance tests.

[0008] 3. The existing oven cannot know the actual baking temperature curve of the test plate in the oven. When the performance of the coating deviates from the design requirements, it is difficult to determine whether the formula needs to be adjusted or the baking is insufficient or over-baked. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide a temperature-controllable baking device, which can improve baking efficiency and achieve precise temperature control; the device has a compact and intensive structure, saves layout space, and reduces costs.

[0010] In order to solve the above technical problems, an embodiment of the present invention provides a controllable temperature baking device, comprising: a box body, the box body comprising a plurality of independent baking units, each of which is provided with a heating element and a sensing element; a room temperature air inlet channel, the room temperature air inlet channel comprising a room temperature air inlet connected to the plurality of independent baking units in a one-to-one correspondence, each of which comprises a first switch; a heating air inlet channel, the heating air inlet channel comprising a heating air inlet connected to the plurality of independent baking units in a one-to-one correspondence, each of which comprises a second switch; a cooling exhaust channel, the cooling exhaust channel comprising a cooling exhaust port connected to the plurality of independent baking units in a one-to-one correspondence, each of which comprises a third switch; and an electric control unit connected to the independent baking unit, wherein: the electric control unit controls the circulating air volume and baking temperature in each independent baking unit by controlling the switch combination of the first switch, the second switch or the third switch respectively according to the baking mode set and the sensing signal fed back by the sensing element, and realizes different The baking scheme includes: a leveling stage, a heating stage, a constant temperature stage and a cooling stage of baking, wherein: in the leveling stage of baking, the electronic control unit switches the air intake between the room temperature air inlet and the heating air inlet according to the current room temperature; in the heating stage, the electronic control unit controls the air intake of the heating air inlet to complete the climb from the starting temperature to the target temperature within the specified time; in the constant temperature stage, the electronic control unit controls the room temperature air inlet and the heating air inlet to alternately intake air; in the cooling stage, the electronic control unit controls the room temperature air inlet and the cooling exhaust port to intake air. The invention also includes: a heating chamber for setting the heating power range according to the temperature range required by the independent baking unit, the heating chamber is connected to the heating air inlet channel, and the heating chamber is set as a plurality of groups that can operate independently; it also includes: a variable frequency exhaust fan motor, the variable frequency exhaust fan motor is connected to the cooling exhaust channel; the exhaust air through the cooling exhaust port drives the room temperature air inlet or the heating air inlet, wherein: the room temperature air inlet and the heating air inlet are provided with a filter unit for preventing the external air from bringing in dust into the baking unit, and the cooling exhaust port is connected to the air treatment equipment for purification and then discharged.

[0011] The temperature-raising air inlet is arranged at the bottom of the independent baking unit, and the room-temperature air inlet is arranged at the top of the independent baking unit.

[0012] The independent baking unit is a box-shaped accommodating cavity in which a spoiler is provided.

[0013] Among them, the independent baking unit includes: a panel that can be pulled open or closed relative to the accommodating cavity; a high-temperature rubber strip is provided on the panel where it contacts the box body, the panel is high-temperature resistant tempered glass, and a metal material frame is provided around the panel.

[0014] Wherein, at least one layer of partition net for placing the test plate is provided in the independent baking unit, the partition net is fastened to the panel, and the panel is provided with elastic buckles.

[0015] The sensing components include: a plurality of temperature control probes and air circulation volume sensing probes; the plurality of temperature control probes and air circulation volume sensing probes are respectively arranged on the side walls of the accommodating cavity.

[0016] Among them, the first switch, the second switch or the third switch includes: a forward and reverse motor; a tube cover drive shaft connected to the forward and reverse motor; and a tube cover connected to the tube cover drive shaft, wherein: the forward and reverse motor is controlled to operate to link the tube cover drive shaft and the tube cover to move back and forth, so that the tube cover moves to open or close the room temperature air inlet, the heating air inlet or the cooling exhaust port.

[0017] The temperature-controllable baking device provided by the present invention has the following beneficial effects: the electronic control unit controls the circulating air volume and baking temperature in each independent baking unit by controlling the switch combination of the first switch, the second switch or the third switch respectively according to the stored set baking mode and the sensing signal fed back by the sensing component, thereby improving the baking efficiency and achieving precise temperature control; the structure is compact and intensive, saving layout space and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the main structure of the temperature-controllable baking device according to an embodiment of the present invention.

[0020] Figure 2 It is a side structural schematic diagram of a temperature-controllable baking device according to an embodiment of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of a panel assembly partition screen of a temperature-controllable baking device according to an embodiment of the present invention.

[0022] Figure 4 The side view of the panel assembly partition of the temperature controllable baking device according to the embodiment of the present invention is a schematic diagram

[0023] Figure 5 It is a structural schematic diagram of a slider control device of a first switch, a second switch and a third switch according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 5 FIG. 1 shows a first embodiment of the temperature-controllable baking device of the present invention.

[0026] The controllable temperature baking device in this embodiment includes: a box A, which includes a plurality of independent baking units 1, and the independent baking units 1 are provided with independently controlled heating components and sensing components; a room temperature air inlet channel 2, which includes a plurality of room temperature air inlets connected to the plurality of independent baking units 1 in a one-to-one correspondence, and each room temperature air inlet includes a first switch; a temperature increase air inlet channel 3, which includes a plurality of temperature increase air inlets connected to the plurality of independent baking units 1 in a one-to-one correspondence, and each temperature increase air inlet includes a second switch; a temperature reduction exhaust channel 4, which includes a plurality of temperature reduction exhaust ports connected to the plurality of independent baking units 1 in a one-to-one correspondence, and each temperature reduction exhaust port includes a third switch; and an electronic control unit connected to the independent baking unit 1, wherein: the electronic control unit controls the circulating air volume and baking temperature in each independent baking unit 1 by controlling the switch combination of the first switch, the second switch or the third switch according to the stored set baking mode and the sensing signal fed back by the sensing component.

[0027] In specific implementation, the box body A is in a cubic shape, and is composed of a plurality of independent baking units 1. The independent baking unit 1 is a box-shaped structure with a containing chamber. The independent baking unit 1 is a device that can perform independent baking and is controlled by an electronic control unit. In specific implementation, the independently controlled heating element provided in the independent baking unit 1 is a heating tube that can be independently controlled to achieve heating. The independent heating function of the independent baking unit 1 is achieved by controlling the temperature of the heating tube. The room temperature air intake channel 2, the temperature increase air intake channel 3 and the temperature reduction exhaust channel 4 can cooperate with each other to complete the adjustment of temperature and airflow.

[0028] Furthermore, the box body A includes: a accommodating cavity for baking and a panel 11b that can be pulled open or closed relative to the accommodating cavity.

[0029] Preferably, the panel 11b is a double-layer hollow high-temperature resistant tempered glass, and a metal frame is arranged around the panel 11b. The purpose of such arrangement is that the high-temperature resistant tempered glass is arranged to facilitate observation of changes in the test board during the baking process. The metal frame can enhance the airtightness and structural stability of the baking chamber, for example, a light aluminum alloy material is used in this embodiment.

[0030] Preferably, a high-temperature rubber strip is provided at the contact point between the panel 11b and the box body, and the function of the high-temperature rubber strip is to prevent heat loss.

[0031] Furthermore, the independent baking unit 1 is provided with at least one layer of partition net 11c for placing the test board, and the partition net 11c is fastened to the panel 11b, and the panel 11b is provided with an elastic buckle 11d. The purpose of such a setting is that the metal frame connects the partition net 11c, and the partition net 11c forms a structure similar to a drawer panel and a drawer bottom plate, which is convenient for taking and placing the test board; the elastic buckle 11d fastens the structure composed of the glass panel 11b, the metal frame, and the partition net 11c to the box body 1.

[0032] Furthermore, the independent baking unit 1 is provided with sensing components, including: multiple temperature control probes and air circulation volume sensing probes, and the multiple temperature control probes and air circulation volume sensing probes are respectively arranged on the side walls of the accommodating cavity. Among them: the function of the multiple temperature control probes is to better reflect the temperature curve of the test board in the independent baking unit 1 so that the design engineer can better understand the temperature state of the test board; the function of the air circulation volume sensing probe is to better reflect the air volume and wind speed in the independent baking unit 1. The sensing components enable the design engineer to adjust the plan more effectively and improve the R&D efficiency.

[0033] Preferably, the heating components, the temperature control components, and the air circulation components are respectively placed on the side wall surfaces inside the accommodating cavity of the independent baking unit 1 except the panel 11 b.

[0034] During the specific implementation of the independent baking unit 1 in this embodiment, the independent baking unit 1 is independently heated and controlled. For example, radiation heating and infrared heating can be used. In order to make the heat transfer more uniform, graphene materials, nanomaterials (for example: Good Energy Saving Nano Microporous Insulation Materials, thermal conductivity 0.026w / MK; 2. High thermal conductivity materials: silicon alloy aluminum) and conventional high thermal conductivity materials with excellent thermal conductivity can be designed as heat transfer plates. If necessary, consider installing a spoiler to ensure efficient and uniform heat conduction and heat dissipation so that the baking chamber and the test plate are evenly heated.

[0035] Preferably, the temperature control probe is located in the middle of the top of the baking chamber, for example, slightly below the screen guide groove, so as not to interfere with other operations, so as to make the temperature control more accurate and effective.

[0036] Furthermore, each independent baking unit 1 can realize a complete air circulation, and the air circulation is realized by the air circulation system of the temperature-controllable baking device.

[0037] Specifically, the temperature-controllable baking device also includes: a room temperature air intake channel 2, the room temperature air intake channel 2 includes a plurality of room temperature air inlets connected one-to-one with a plurality of independent baking units 1, each room temperature air inlet includes a first switch; a temperature increase air intake channel 3, the temperature increase air intake channel 3 includes a plurality of temperature increase air inlets connected one-to-one with a plurality of independent baking units 1, each temperature increase air inlet includes a second switch; a temperature reduction exhaust channel 4, the temperature reduction exhaust channel 4 includes a plurality of temperature reduction exhaust ports connected one-to-one with a plurality of independent baking units 1, each temperature reduction exhaust port includes a third switch; and an electronic control unit connected to the independent baking unit 1.

[0038] By controlling the wind speed and air volume entering the room temperature air inlet, the heating air inlet and the cooling air outlet of each independent baking unit 1 respectively, different baking schemes can be achieved. For example, according to the setting of the baking scheme, the wind speed and air volume are controlled by frequency conversion technology. The air circulation of the independent baking unit 1 can adopt the mode of exhaust driving air intake, that is, the exhaust of the cooling air outlet drives the air intake of the room temperature air inlet or the heating air inlet. Specifically, the electronic control unit can control the circulating air volume and baking temperature in each independent baking unit 1 by controlling the switch combination of the first switch, the second switch or the third switch respectively according to the baking mode set in storage and the sensing signal fed back by the sensing component.

[0039] Specifically, the baking mode includes: the leveling stage, the heating stage, the constant temperature stage and the cooling stage of baking. The air circulation in each independent baking unit 1 can be realized by controlling the wind speed and air volume according to the setting of the baking plan by using the frequency conversion technology. For example: in the leveling stage of baking, the circulating wind speed of the baking chamber can be determined according to the parameters; in the heating and baking stage, the heating power can be increased to maintain microcirculation; in the constant temperature stage, microcirculation can be set; in the cooling stage, the equipment will be powered off on time according to the setting, and the high-power mode will be automatically turned on to accelerate ventilation and cooling to vacate the equipment in the shortest time, so that the next baking plan can start from room temperature as a heating plan. For example, some independent baking units 1 require a baking plan with a maximum temperature of 80 degrees and a heat preservation of 20 minutes, while some independent baking units 1 require a baking plan with a maximum temperature of 150 degrees and a heat preservation of 60 minutes. In this case, the heating tube can be controlled by the sensing probe in the independent baking unit 1 respectively, and the temperature and airflow of the independent baking unit 1 can be adjusted through the feedback of the air circulation volume sensing probe and the mutual coordination between the room temperature air intake channel 2, the heating air intake channel 3 and the cooling exhaust channel 4.

[0040] For example, in the leveling stage of baking, the electronic control unit switches the air intake between the room temperature air inlet and the heating air inlet according to the current room temperature; in the heating stage, the electronic control unit controls the air intake of the heating air inlet to complete the climb from the starting temperature to the target temperature within the specified time; in the constant temperature stage, the electronic control unit controls the room temperature air inlet and the heating air inlet to alternately intake air; in the cooling stage, the electronic control unit controls the air intake of the room temperature air inlet and the exhaust flow of the cooling exhaust port. In other words: in different baking modes, the electronic control unit can switch the working mode of the air inlet and the exhaust port, for example: start the room temperature air inlet in the leveling stage of baking; start the heating air inlet in the heating and insulation stage; switch to the cooling exhaust port in the cooling stage.

[0041] The purpose of such setting is: in the early period of the baking plan, or the temperature curve of the baking plan, the low temperature should be maintained for a period of time in the early stage, and the air flow should be maintained at a certain wind speed, so that the solvent in the middle and bottom parts of the coating microstructure of the sprayed parts can have the opportunity to escape from the micropores in the coating microstructure when the top part (epidermis) of the coating has not yet been sealed. If the sprayed parts that have just been sprayed are immediately placed in a high-temperature space for baking, it is very easy to have coating defects - coating bubbles or industry terms - prickly heat. The reason is that a reasonable room temperature or low-temperature leveling section is not set.

[0042] Furthermore, it also includes: a heating chamber, which can adjust the heating power range according to the temperature range required by the independent baking unit 1, and the heating chamber is connected to the temperature rising air inlet channel 3. The heating chamber is set as multiple groups that can operate independently. The independent baking unit 1 transports hot air to each accommodating cavity from the heating chamber. This solution can achieve more precise temperature control; it also includes: a variable frequency exhaust motor, and the variable frequency exhaust motor is connected to the cooling exhaust channel 4.

[0043] Preferably, the room temperature air inlet is arranged at the top of the independent baking unit 1. The purpose of such arrangement is to utilize the principle that cold air has a higher specific gravity and naturally disperses downward to better dissipate heat and achieve a more uniform heat transfer and heat conduction effect.

[0044] Preferably, the heating air inlet is arranged at the bottom of the independent baking unit 1. The purpose of such arrangement is to utilize the principle that hot air has a light specific gravity and naturally rushes upward to better transfer heat and achieve a more uniform heat transfer and heat conduction effect.

[0045] Preferably, the room temperature air inlet and the heating air inlet are provided with a filter unit to prevent dust from being brought into the baking unit by external air, and the cooling exhaust port is connected to an air treatment device (such as a filter device) for purification before discharge.

[0046] Preferably, the diameters of the room temperature air inlet, the heating air inlet and the cooling air outlet can be adjusted according to the wind speed range set for the air-baking mode and the volume of the independent baking unit 1.

[0047] Furthermore, the circulating air volume of the air circulation in each independent baking unit 1 is determined by the airflow formed by the exhaust flow and the intake flow, and the air volume control is achieved in the following manner.

[0048] The first switch, the second switch or the third switch in this embodiment is a slider control device K, which includes: a forward and reverse motor 51; a tube cover drive shaft 52 connected to the forward and reverse motor 51; and a tube cover 53 connected to the tube cover drive shaft 52, wherein: the forward and reverse motor 51 is controlled to operate to link the tube cover drive shaft 52 and the tube cover 53 to move back and forth, so that the tube cover 53 moves to open or proportionally close the room temperature air inlet, the temperature increase air inlet or the temperature decrease exhaust port.

[0049] With this structure, the circulating air volume of the air circulation in the independent baking unit 1 is completed by controlling the opening and closing angle of the pipe cover 53 by the forward and reverse motor 51. For example, when the system is inletting air at room temperature, the cover 53 of the heating air inlet is automatically closed; when the system is inletting air for heating, the cover 53 of the room temperature air inlet is automatically closed; when the system is adjusting the wind speed, the cover of the room temperature air inlet and / or the heating air inlet can adjust the closing angle to cooperate.

[0050] When the temperature-controlled baking device of this embodiment is implemented, each independent baking unit 1 can independently realize one baking, and can quickly start the next baking after one baking. Specifically, in the leveling stage of baking, when the room temperature is >25°C, air can be inhaled from the room temperature air inlet, and when the room temperature is <25°C, the heating air inlet can be selected to heat the air in a certain temperature range or to keep the air in a certain temperature range;

[0051] During the heating stage, the system determines the curve to complete the climbing process from the starting temperature to the target temperature within the specified time. During the heating stage, air is sucked in from the heating air inlet; during the constant temperature stage, air is sucked in alternately from the room temperature air inlet and the heating air inlet. After reaching the target temperature, the system immediately closes the heating chamber circuit. At the same time, the heating air inlet pipe is closed. If the inertial overtemperature exceeds the target temperature by 5%, the system can start the room temperature air intake and exhaust to properly release heat, and control the high temperature peak to within 105% of the target temperature (i.e. not more than 5%). When the cooling trend reaches 102% of the target temperature, the system will confirm whether the high temperature peak of the heating chamber is more than 10% of the target temperature. If it does not exceed 10% of the target temperature, the heating function will be started immediately to ensure that the temperature of the heating chamber is kept constant at around 110% to 120% of the target temperature, so as to ensure that the baking chamber can be heated at any time.

[0052] The room temperature air inlet is used for air intake during the cooling stage, and the system can adjust the air volume according to the cooling curve stage of the baking scheme. It should be noted that the exhaust power of each independent baking unit 1 is determined by the electronic control unit according to the set baking mode and the set exhaust volume. For example, during the baking and leveling stage, it is necessary to maintain a low temperature or medium-low temperature with a relatively large wind speed to ensure that the solvent (including organic solvents and water vapor) in the wet film is discharged quickly without sealing the surface of the coating. If the room temperature is low, the heating air inlet can be started according to the scheme settings, and the temperature and air volume of the hot air are controlled according to the data set by the system.

[0053] In other embodiments of the temperature-controlled baking device of the present invention, a spoiler is further provided in the independent baking unit 1, and the spoiler is arranged above the heat pipe of the independent baking unit 1, and it is preferably a honeycomb plate. Its function is to avoid uneven heating caused by direct heat rush. The spoiler is made of graphene materials, nanomaterials, and conventional high thermal conductivity materials with excellent thermal conductivity, and efficiently and evenly conducts heat and dissipates heat, so that the independent baking unit 1 and the test plate are evenly heated, and it is also convenient to accurately control the temperature of the baking chamber. After the baking scheme is completed, the heat can be dissipated by high-power exhaust ventilation, or the air volume can be accurately controlled according to the baking scheme to achieve the trend of the cooling curve. In addition, each independent baking unit 1 is equipped with an electronically controlled touch screen, and the operator can set, display and set the baking mode through the touch screen. After setting the baking mode, the baking scheme will record the temperature curve of the baking scheme in the whole process after the electronically controlled touch screen is set. The temperature curve can be displayed in real time through the panel and can be transmitted to other terminal devices through the network (wired or wireless).

[0054] The implementation of the temperature-controllable baking device of the present invention has the following beneficial effects: the electronic control unit controls the circulating air volume and baking temperature in each independent baking unit by controlling the switch combination of the first switch, the second switch or the third switch respectively according to the stored set baking mode and the sensing signal fed back by the sensing component, thereby improving the baking efficiency and achieving precise temperature control; the structure is compact and intensive, saving layout space and reducing costs.

Claims

1. A temperature-controllable baking device, characterized in that: include: A box body, wherein the box body comprises a plurality of independent baking units, wherein the independent baking units are provided with heating components and induction components; A room temperature air inlet channel, the room temperature air inlet channel comprising room temperature air inlets connected to the plurality of independent baking units in a one-to-one correspondence, and any of the room temperature air inlets comprising a first switch; A temperature-raising air inlet channel, the temperature-raising air inlet channel comprising temperature-raising air inlets connected to the plurality of independent baking units in a one-to-one correspondence, and any of the temperature-raising air inlets comprising a second switch; A cooling exhaust channel, wherein the cooling exhaust channel comprises cooling exhaust ports connected to the plurality of independent baking units in a one-to-one correspondence, and any of the cooling exhaust ports comprises a third switch; as well as An electric control unit connected to the independent baking unit, wherein: The electronic control unit controls the circulating air volume and the baking temperature in any of the plurality of independent baking units by controlling the switch combination of the first switch, the second switch or the third switch according to the stored set baking mode and the sensing signal fed back by the sensing element, and realizes different baking schemes by controlling the wind speed and air volume entering the room temperature air inlet, the heating air inlet and the cooling air outlet of each independent baking unit respectively; The baking mode includes: a leveling stage, a heating stage, a constant temperature stage and a cooling stage of baking, wherein: in the leveling stage of baking, the electronic control unit switches the air intake between the room temperature air inlet and the heating air inlet according to the current room temperature; in the heating stage, the electronic control unit controls the air intake of the heating air inlet to complete the climb from the starting temperature to the target temperature within a specified time; in the constant temperature stage, the electronic control unit controls the room temperature air inlet and the heating air inlet to alternately intake air; in the cooling stage, the electronic control unit controls the air intake of the room temperature air inlet and the exhaust flow of the cooling exhaust port; It also includes: a heating chamber for setting the heating power range according to the temperature range required by the independent baking unit, the heating chamber is connected to the temperature rising air inlet channel, and the heating chamber is set as multiple groups that can operate independently; it also includes: a variable frequency exhaust motor, the variable frequency exhaust motor is connected to the temperature falling exhaust channel; the exhaust through the temperature falling exhaust port drives the room temperature air inlet or the temperature rising air inlet to inlet, wherein: the room temperature air inlet and the temperature rising air inlet are provided with a filter unit for preventing external air from bringing in dust into the baking unit, and the temperature falling exhaust port is connected to the air treatment equipment for purification and then discharged.

2. The temperature-controllable baking device according to claim 1, characterized in that: The temperature-raising air inlet is arranged at the bottom of the independent baking unit, and the room-temperature air inlet is arranged at the top of the independent baking unit.

3. The temperature-controllable baking device according to claim 1, characterized in that: The independent baking unit is a box-shaped accommodating cavity in which a spoiler is arranged.

4. The temperature-controllable baking device according to claim 3, characterized in that: The independent baking unit comprises: a panel that can be pulled open or closed relative to the accommodating cavity; A high-temperature rubber strip is arranged at the contact position between the panel and the box body, the panel is made of high-temperature resistant tempered glass, and a metal material frame is arranged around the panel.

5. The temperature-controllable baking device according to claim 4, characterized in that: The independent baking unit is provided with at least one layer of partition net for placing the test plate, the partition net is fastened to the panel, and the panel is provided with elastic buckles.

6. The temperature-controllable baking device according to claim 3, characterized in that: The sensing components include: a plurality of temperature control probes and an air circulation air volume sensing probe, and the plurality of temperature control probes and the air volume sensing probe are respectively arranged on the side walls of the accommodating cavity.

7. The temperature-controllable baking device according to claim 1, characterized in that: The first switch, the second switch or the third switch comprises: Forward and reverse motor; A pipe cover transmission shaft connected to the forward and reverse motor; and A tube cover connected to the tube cover drive shaft, wherein: the forward and reverse motors are controlled to operate to link the tube cover drive shaft and the tube cover to move back and forth, so that the tube cover moves to open or close the room temperature air inlet, the temperature increase air inlet or the temperature decrease exhaust port.

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