Electrically heated air-blast drying oven

Abstract

The application discloses an electric heating air drying oven, and relates to the technical field of electric heating air drying ovens, which comprises a box body, a protection door is hinged to the front side of the box body, a transparent observation window is arranged on the protection door, control components for drying operation control are arranged on the box body, and a placing cavity for loading and placing is arranged in the box body. Through the cooperation of the electric heating circulating drying assembly, the air circulating assembly, the adjusting assembly and the control assembly, different use states can be flexibly switched according to processing requirements in the process of air drying of the materials, electric heating air drying treatment is facilitated, when the air circulation state is used inside and outside the box body, the air inlet and air outlet can be flexibly adjusted at the same time, the air inlet and air outlet can be matched after adjustment, the probability of abnormal pressure in the electric heating air drying oven is reduced, and stable drying operation use of the electric heating air drying oven is ensured.

Description

Technical Field

[0001] This invention relates to the field of electric heating forced-air drying oven technology, specifically an electric heating forced-air drying oven. Background Technology

[0002] An electric heating forced-air drying oven is a laboratory and industrial equipment that uses a fan to force hot air circulation for constant-temperature drying of materials. It generates hot air through electric heating and forms a closed or open hot air circulation airflow driven by a fan, which quickly removes moisture or volatile substances from the materials, achieving uniform and efficient drying, baking or curing operations.

[0003] In order to create a controllable airflow exchange and circulation mode during the use of the electric heating drying oven, so as to ensure efficient and uniform drying effect, stabilize the pressure inside the oven and avoid risks to equipment and samples, the oven is equipped with an air inlet and an air outlet. The air outlet discharges the humid air and volatile gases inside the oven, breaking the humidity saturation state and accelerating the evaporation of moisture from the sample. The air outlet then replenishes the oven with dry air from the outside. Together with heating and blowing, a continuous dry and hot airflow circulation is formed to ensure uniform temperature inside the oven. Existing electric heating forced-air drying ovens mainly use either integrated or separate air inlets and outlets. Integrated inlets and outlets, with a single opening on the oven body, allow for simultaneous air intake and exhaust, but this makes it inconvenient to individually control the intake and exhaust volumes, affecting flexible air intake and exhaust usage. Separate inlets and outlets use two corresponding sets of openings on the oven body for separate air intake and exhaust. The intake and exhaust volumes are controlled by adjusting the opening degree of each opening. However, during the adjustment of the inlet and outlet opening degrees, because the adjustment mechanisms are independent, their adjustments are asynchronous, and their adjustment ranges are inconsistent, differences in the opening degrees of the inlet and outlet often occur. This leads to a mismatch between the intake and exhaust volumes, causing abnormal pressure changes inside the electric heating forced-air drying oven and affecting its stable drying operation. Therefore, we propose an electric heating forced-air drying oven. Summary of the Invention

[0004] The purpose of this invention is to provide an electrically heated forced-air drying oven to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an electric heating forced-air drying oven, comprising a box body, a protective door hinged to the front side of the box body, a transparent observation window provided on the protective door, a control component for controlling the drying operation provided on the box body, and a placement cavity for carrying and placing inside the box body, further comprising: An electric heating circulation drying component is installed inside the chamber and is used for electric heating circulation during the drying process; An air circulation component is installed on the housing for air circulation between the inside and outside of the housing. The housing is equipped with an adjustment component for regulating the air circulation status and a control component for controlling the intake and exhaust air volume during the air circulation process. And a filter assembly located on the outside of the housing for filtering air during the intake and exhaust process.

[0006] Preferably, the electrothermal circulating drying assembly includes a first cavity, a second cavity, and a third cavity that communicate with each other inside the housing. The first cavity, the second cavity, and the third cavity are connected to each other and arranged in a U-shape around the periphery of the placement cavity. An electric heater is installed inside the first cavity. A guide hole for assisting gas flow is opened between the first cavity and the placement cavity and between the second cavity and the placement cavity. A fan for assisting gas circulation is installed inside the third cavity.

[0007] Preferably, the air circulation assembly includes an air inlet and an air outlet on the housing, and an installation cavity is provided at the junction of the third cavity and the first cavity. The air inlet and the air outlet are connected to the interior of the installation cavity, and the air inlet and the air outlet are symmetrically arranged on the diagonal axis of the installation cavity.

[0008] Preferably, the adjustment assembly includes a first baffle and a second baffle symmetrically fixed inside the first cavity, a third baffle and a fourth baffle fixed inside the mounting cavity, the first baffle and the third baffle and the second baffle and the fourth baffle being arranged flush in the vertical direction, an adjustment plate being provided inside the mounting cavity, a rotating assembly for rotating the adjustment plate being provided on the housing, and a pressing assembly for pressing the adjusted plate after rotation being provided inside the mounting cavity.

[0009] Preferably, the control component includes a first control plate and a second control plate disposed inside the mounting cavity for respectively blocking the air inlet and the air outlet. The first control plate and the second control plate are disposed against the inner wall of the mounting cavity, and the mounting cavity is provided with a transmission component for driving the first control plate and the second control plate and a guide component for guiding during the transmission process.

[0010] Preferably, the transmission assembly includes a first rack and a second rack disposed inside the mounting cavity. The first rack and the second rack are fixed to the first control plate and the second control plate, respectively. A first mounting shaft and a second mounting shaft are rotatably connected inside the mounting cavity. A first gear and a second gear are fixed on the first mounting shaft and the second mounting shaft, respectively. The first gear meshes with the first rack, the first gear with the second gear, and the second gear with the second rack. A mounting motor for driving the first mounting shaft is mounted on the outside of the housing.

[0011] Preferably, the guide assembly includes multiple sets of sliding holes formed on the first control plate and the second control plate, and a guide rod is slidably connected inside the sliding hole, and the guide rod is fixed inside the mounting cavity.

[0012] Preferably, the rotating assembly includes a rotating shaft centrally fixed to the adjusting plate, and a drive motor for driving the rotating shaft is mounted on the outside of the housing.

[0013] Preferably, the pressing assembly includes a pressure plate disposed inside the mounting cavity, the mounting cavity is provided with an elastic assembly for elastically pushing the pressure plate, the adjusting plate is provided with a front side and a rear side, the bottom of the pressure plate is provided with a pressing surface for pressing against the rear side of the adjusting plate, and one side of the pressure plate is provided with an inclined surface for pressing against the front side of the adjusting plate. The elastic component includes multiple sets of sliding rods fixed inside the mounting cavity. Sleeves are slidably connected to the sliding rods. One end of the sleeve is fixed to the pressure plate. A spring is sleeved on the outside of the sleeve. The two ends of the spring are respectively connected to the inner wall of the mounting cavity and the pressure plate.

[0014] Preferably, the filter assembly includes a mounting groove on the outside of the housing, the air inlet and air outlet are connected to the mounting groove, and a filter plate is installed inside the mounting groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention, through the coordinated operation of an electric heating circulating drying component, an air circulation component, an adjustment component, and a control component, allows for flexible switching between different operating states during the material drying process, based on processing requirements. This facilitates electric heating drying, and when used in a state of air circulation both inside and outside the chamber, it can flexibly adjust the intake and exhaust volumes simultaneously, ensuring a match between the intake and exhaust volumes after adjustment. This reduces the probability of abnormal internal pressure in the electric heating drying chamber and guarantees stable drying operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a schematic diagram of the rear structure of the housing of the present invention; Figure 3 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 4 This is a schematic diagram of the circulating drying component structure of the present invention; Figure 5 This is a schematic diagram of the filter assembly structure of the present invention; Figure 6 This is a schematic diagram showing the positional relationship between the air inlet and air outlet of the present invention; Figure 7This is a schematic diagram of the adjustment component structure of the present invention; Figure 8 This is a schematic diagram of the control component structure of the present invention; Figure 9 This is a schematic diagram of the guiding component structure of the present invention; Figure 10 This is a schematic diagram of the transmission component structure of the present invention; Figure 11 This is a schematic diagram of the pressing component and elastic component of the present invention; Figure 12 This is a schematic diagram of the internal circulation state of the box in this invention; Figure 13 This is a schematic diagram of the internal and external circulation states of the box in this invention; Figure 14 This is a schematic diagram showing the movement directions of the first control board and the second control board during the transmission process of the present invention; Figure 15 This is a schematic diagram showing the direction of movement of the pressure plate after being subjected to force according to the present invention.

[0017] In the diagram: 101-Box body; 102-Protective door; 103-Transparent observation window; 104-Control components; 105-Placement cavity; 201-Air inlet; 202-Air outlet; 203-Mounting cavity; 301-First baffle; 302-Second baffle; 303-Third baffle; 304-Fourth baffle; 305-Adjusting plate; 401-Rotating shaft; 402-Drive motor; 501-Pressure plate; 502-Pressure surface; 503-Sloping surface; 601-Slide rod; 602-Sleeve; 60 3-Spring; 701-First control board; 702-Second control board; 801-Sliding hole; 802-Guide rod; 901-First rack; 902-Second rack; 903-First mounting shaft; 904-Second mounting shaft; 905-First gear; 906-Second gear; 907-Motor mounting; 1001-Mounting groove; 1002-Filter plate; 1101-First cavity; 1102-Second cavity; 1103-Third cavity; 1104-Guide hole; 1105-Fan. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 Please see Figures 1-15The figure shows an electric heating drying oven, which includes a box body 101. The front hinge of the box body 101 has a protective door 102. The protective door 102 is provided with a transparent observation window 103. The box body 101 is provided with a control component 104 for controlling the drying operation. The interior of the box body 101 is provided with a placement cavity 105 for carrying and placing. It should be noted here that: the control component 104 is a conventional control component on an electric heating drying oven in this application, and its working principle and control method are known technologies, so they will not be described in detail here. Also includes: An electric heating circulation drying component is installed inside the chamber 101 for electric heating circulation during the drying process; An air circulation component is installed on the housing 101 for air circulation between the inside and outside of the housing 101. An adjustment component for adjusting the air circulation state is installed inside the housing 101, and a control component for controlling the air intake and exhaust volume during the air circulation process is installed inside the housing 101. And a filter assembly located on the outside of the housing 101 for filtering air during the intake and exhaust process; It should be noted that through the cooperation of the electric heating circulating drying component, air circulation component, adjustment component, and control component, different operating states can be flexibly switched according to processing requirements during the material drying process. This facilitates electric heating drying. Furthermore, when the air circulation state inside and outside the chamber 101 is maintained, the intake and exhaust volumes can be flexibly adjusted simultaneously. After adjustment, the intake and exhaust volumes can be matched, reducing the probability of abnormal internal pressure in the electric heating drying chamber and ensuring stable drying operation.

[0020] Preferably, the electric heating circulating drying assembly includes a first cavity 1101, a second cavity 1102, and a third cavity 1103 that are connected inside the housing 101. The first cavity 1101, the second cavity 1102, and the third cavity 1103 are connected to each other and arranged in a U-shape around the periphery of the placement cavity 105. An electric heater is installed inside the first cavity 1101. A guide hole 1104 for assisting gas flow is opened between the first cavity 1101 and the placement cavity 105 and between the second cavity 1102 and the placement cavity 105. A fan 1105 for assisting gas circulation is installed inside the third cavity 1103. It should be noted that during the drying process, the electric heater and the fan 1105 are started. Through the suction driving action of the fan 1105 and the flow guiding action of the guide hole 1104, the gas flows through the first chamber 1101, the placement chamber 105, the second chamber 1102 and the third chamber 1103. During the flow, the electric heater heats the flowing gas, so that the gas with a certain amount of heat passes through the material in the placement chamber 105, thereby achieving the purpose of electric heating and air drying of the material. In addition, the electric heater and the fan 1105 are conventional technical components in this application, and their working principle and control method will not be described in detail here.

[0021] Preferably, the air circulation assembly includes an air inlet 201 and an air outlet 202 opened on the housing 101, and an installation cavity 203 is opened at the junction of the third cavity 1103 and the first cavity 1101, and the air inlet 201 and the air outlet 202 are connected to the interior of the installation cavity 203. It should be noted here that: by adjusting the components, the gas delivered inside the third chamber 1103 cannot enter the first chamber 1101 for recirculation and is discharged outward through the air outlet 202. External air enters the first chamber 1101 through the air inlet 201 and is heated and circulated inside the chamber 101 by the suction pressure, forming an internal and external air circulation. Through internal and external circulation, the humid air generated during the drying process is discharged outward in a timely manner, which not only ensures the drying efficiency and drying effect, but also avoids the risk of equipment failure and sample damage. The air inlet 201 and the air outlet 202 are symmetrically arranged on the diagonal axis of the mounting cavity 203; It should be noted here that: regarding the symmetrical arrangement, the mounting cavity 203 is square, and the diagonal axis of the mounting cavity 203 is tilted downward at a 45-degree angle.

[0022] Preferably, the adjustment assembly includes a first baffle 301 and a second baffle 302 symmetrically fixed inside the first cavity 1101, a third baffle 303 and a fourth baffle 304 fixed inside the mounting cavity 203, the first baffle 301 and the third baffle 303 and the second baffle 302 and the fourth baffle 304 being arranged flush in the vertical direction, an adjustment plate 305 being provided inside the mounting cavity 203, a rotation assembly for rotating the adjustment plate 305 being provided on the housing 101, and a pressing assembly for pressing the adjusted plate 305 after rotation being provided inside the mounting cavity 203; It should be noted here that when auxiliary air intake and exhaust are required, the rotating shaft 401 and the adjusting plate 305 on the rotating shaft 401 are rotated counterclockwise through the transmission. During the rotation, the adjusting plate 305 abuts against the second baffle 302 and the third baffle 303 respectively (see...). Figure 13 At this point, due to the blocking effect of the adjusting plate 305, the gas delivered inside the third chamber 1103 cannot enter the first chamber 1101 for recirculation and is discharged outward through the air outlet 202. External air enters the first chamber 1101 through the air inlet 201 and is heated and circulated inside the chamber 101 by the suction action, forming an air circulation inside and outside the chamber 101. In the later stage of drying, the humidity inside the chamber 101 is low. Through transmission, the adjusting plate 305 rotates in the opposite direction. During the rotation, the adjusting plate 305 abuts against the first baffle 301 and the fourth baffle 304 respectively. At this time, the adjusting plate 305 seals the air inlet 201 and the air outlet 202, and no more air is introduced or vented. The gas delivered inside the third chamber 1103 flows back into the first chamber 1101. Different usage states can be flexibly switched according to processing requirements, which is convenient for electric heating blower drying.

[0023] Preferably, the control components include a first control plate 701 and a second control plate 702 disposed inside the mounting cavity 203 for respectively blocking the air inlet 201 and the air outlet 202; It should be noted that the first control board 701 initially blocks the air inlet 201 and the second control board 702 blocks the air outlet 202 in the same way, which facilitates subsequent synchronous control operations. The first control plate 701 and the second control plate 702 are disposed against the inner wall of the mounting cavity 203, and the mounting cavity 203 is provided with a transmission component for transmitting the first control plate 701 and the second control plate 702 and a guide component for guiding during the transmission process. It should be noted here that: through transmission, the first control plate 701 and the second control plate 702, after being subjected to force, move toward or away from the air inlet 201 and the air outlet 202, respectively. During the movement, the sealing effect of the first control plate 701 on the air inlet 201 and the second control plate 702 on the air outlet 202 are adjusted, so that the air inlet 201 and the air outlet 202 are used at different opening and closing degrees, thereby achieving the purpose of simultaneously adjusting the air intake and exhaust volume.

[0024] Preferably, the transmission assembly includes a first rack 901 and a second rack 902 disposed inside the mounting cavity 203. The first rack 901 and the second rack 902 are fixed to the first control plate 701 and the second control plate 702, respectively. A first mounting shaft 903 and a second mounting shaft 904 are rotatably connected inside the mounting cavity 203. A first gear 905 and a second gear 906 are fixed on the first mounting shaft 903 and the second mounting shaft 904, respectively. The first gear 905 is meshed with the first rack 901, the first gear 905 is meshed with the second gear 906, and the second gear 906 is meshed with the second rack 902. A mounting motor 907 for driving the first mounting shaft 903 is mounted on the outside of the housing 101. It should be noted here that: by installing the motor 907, the first gear 905 on the first mounting shaft 903 is rotated. Since the first gear 905 is meshed with the first rack 901, the first gear 905 with the second gear 906, and the second gear 906 with the second rack 902, the rotation of the first gear 905 causes the first control plate 701 and the second control plate 702 to move under force. During the movement of the first control plate 701 and the second control plate 702, the guiding effect of the guiding component causes the first control plate 701 and the second control plate 702 to move towards or away from the air inlet 201 and the air outlet 202 respectively. In addition, the motor 907 is a conventional rotary drive component, and its working principle and control method are well-known technologies, so they will not be described in detail here.

[0025] Preferably, the guide assembly includes multiple sets of sliding holes 801 formed on the first control plate 701 and the second control plate 702, and a guide rod 802 is slidably connected inside the sliding hole 801, and the guide rod 802 is fixed inside the mounting cavity 203; It should be noted here that the multiple sets of sliding holes 801 and guide rods 802 facilitate the guidance of the movement of the first control plate 701 and the second control plate 702 after being subjected to force.

[0026] Preferably, the rotating assembly includes a rotating shaft 401 centrally fixed on the adjusting plate 305, and a drive motor 402 for driving the rotating shaft 401 is mounted on the outside of the housing 101. It should be noted here that the adjusting plate 305 rotates through the driving action of the drive motor 402 and the connecting action of the rotating shaft 401. In addition, the working principle and control method of the drive motor 402 are well-known technologies and will not be elaborated on here.

[0027] Preferably, the pressing assembly includes a pressure plate 501 disposed inside the mounting cavity 203, and an elastic component for elastically pushing the pressure plate 501 inside the mounting cavity 203. The adjusting plate 305 is provided with a front side and a rear side. The bottom of the pressure plate 501 is provided with a pressing surface 502 for pressing against the rear side of the adjusting plate 305, and one side of the pressure plate 501 is provided with an inclined surface 503 for pressing against the front side of the adjusting plate 305. It should be noted that during the rotation drive of the adjusting plate 305, as the adjusting plate 305 rotates clockwise, the front side of the adjusting plate 305 abuts against the inclined surface 503 on the pressure plate 501. During the abutment process, the pressure plate 501 is subjected to force and contracts towards the inner wall of the mounting cavity 203. After the adjusting plate 305 is rotated clockwise, the elastic component causes the pressure plate 501 to return to its original position and the pressing surface 502 on the pressure plate 501 abuts against the rear side of the adjusting plate 305. Through the abutment action, the adjusting plate 305 after clockwise rotation is subjected to elastic compression. Through the elastic compression action, the probability of the adjusting plate 305 rotating in the opposite direction after clockwise rotation is reduced due to the long-term effect of the airflow from the third cavity 1103 to the inside of the first cavity 1101 on the front side of the adjusting plate 305, which is subjected to the airflow from the third cavity 1103 to the inside of the first cavity 1101. This facilitates more stable operation during internal circulation. In addition, during the counterclockwise rotation of the adjusting plate 305, the pressure plate 501 is squeezed and contracted again as the adjusting plate 305 rotates. When the adjusting plate 305 no longer abuts against the pressure plate 501, the adjusting plate 305 is reset under the action of the elastic component, and the adjusting plate 305 is no longer pressed.

[0028] The elastic component includes multiple sets of slide rods 601 fixed inside the mounting cavity 203. A sleeve 602 is slidably connected to the slide rod 601. One end of the sleeve 602 is fixed to the pressure plate 501. A spring 603 is sleeved on the outside of the sleeve 602. The two ends of the spring 603 are respectively connected to the inner wall of the mounting cavity 203 and the pressure plate 501. It should be noted that: the multiple sets of sleeves 601 and slide rods 602 facilitate the movement guidance of the pressure plate 501 after being subjected to force, and the spring 603 facilitates the elastic compression of the pressure plate 501 after movement.

[0029] Preferably, the filter assembly includes a mounting groove 1001 opened on the outside of the housing 101, an air inlet 201 and an air outlet 202 communicating with the mounting groove 1001, and a filter plate 1002 being installed inside the mounting groove 1001. It should be noted here that the filter plate 1002 is snapped into the mounting slot 1001, and the incoming and outgoing air is filtered through the filter plate 1002.

[0030] This solution includes an electrically heated forced-air drying oven, comprising the following steps: When using the electric heating forced-air drying oven, the material to be dried is placed inside the placement chamber 105. After placement, the protective door 102 is closed. The electrical components inside the electric heating forced-air drying oven are started and controlled by the control component 104. The state of the material inside the placement chamber 105 is observed through the transparent observation window 103. During the drying process, the electric heater and the fan 1105 are started. Through the suction driving action of the fan 1105 and the flow guiding action of the guide hole 1104, the gas flows through the first chamber 1101, the placement chamber 105, the second chamber 1102 and the third chamber 1103. During the flow, the electric heater heats the flowing gas, allowing the gas with a certain amount of heat to pass through the materials in the placement chamber 105, thus achieving the purpose of electric heating forced-air drying of the material. During the electric heating and drying process, when auxiliary air intake and exhaust are required, the drive motor 402 causes the rotating shaft 401 and the adjusting plate 305 on the rotating shaft 401 to rotate counterclockwise. During the rotation, the adjusting plate 305 abuts against the second baffle 302 and the third baffle 303 respectively (see...). Figure 13 At this point, due to the opposing effect of the adjusting plate 305, the gas delivered inside the third chamber 1103 cannot enter the first chamber 1101 for recirculation and is discharged outward through the air outlet 202. External air enters the first chamber 1101 through the air inlet 201 and is heated and circulated inside the box 101 by the suction pressure, forming an air circulation cycle inside and outside the box 101 (see...). Figure 13 Through internal and external circulation, the humid air generated during the drying process is promptly discharged, ensuring both drying efficiency and effect while mitigating the risks of equipment malfunction and sample damage. In the later stages of drying, when the humidity inside chamber 101 is low, the drive motor 402 causes the adjusting plate 305 to rotate in the opposite direction. During this rotation, the adjusting plate 305 abuts against the first baffle 301 and the fourth baffle 304 respectively (see...). Figure 12 At this time, the air inlet 201 and air outlet 202 are sealed by the regulating plate 305, and no more air is introduced or vented. The gas transported inside the third chamber 1103 flows back into the first chamber 1101, so that the gas inside the box 101 is in an internal circulation state, which reduces heat loss, improves the heating rate and temperature uniformity, and helps to maintain a constant temperature. Therefore, in the process of electric heating blower drying, different usage states can be flexibly switched according to processing requirements, which is convenient for electric heating blower drying. During use in the air circulation state inside and outside the housing 101, it is necessary to adjust the air intake and exhaust volume according to the requirements. During the adjustment process, the first gear 905 on the first mounting shaft 903 is rotated by the installed motor 907. Because the first gear 905 is meshed with the first rack 901, the first gear 905 with the second gear 906, and the second gear 906 with the second rack 902, the rotation of the first gear 905 causes the first control plate 701 and the second control plate 702 to move under force. During the movement of the first control plate 701 and the second control plate 702, the guiding component guides the first control plate 701 and the second control plate 702 to move towards or away from the air inlet 201 and the air outlet 202 respectively (see...). Figure 14 During operation, the sealing effect of the first control plate 701 on the air inlet 201 and the second control plate 702 on the air outlet 202 is adjusted, so that the air inlet 201 and the air outlet 202 are used at different opening and closing degrees, thereby achieving the purpose of simultaneously adjusting the air intake and exhaust volume. In addition, during the adjustment process, since the air inlet 201 and the air outlet 202 are symmetrically set on the diagonal axis of the mounting cavity 203, and the initial sealing state of the first control plate 701 on the air inlet 201 and the second control plate 702 on the air outlet 202 is the same, the synchronous transmission of the first control plate 701 and the second control plate 702 can ensure that the opening and closing degree of the air inlet 201 and the air outlet 202 is the same after adjustment, so that the air intake volume and exhaust volume are matched, reducing the probability of abnormal internal pressure of the electric heating blower drying box and ensuring the stable drying operation of the electric heating blower drying box. During the rotation drive of the adjusting plate 305, as the adjusting plate 305 rotates clockwise, the front side of the adjusting plate 305 abuts against the inclined surface 503 on the pressure plate 501. During the abutment process, the pressure plate 501 is subjected to force and contracts towards the inner wall of the mounting cavity 203. After the adjusting plate 305 is rotated clockwise, the spring component causes the pressure plate 501 to reset and the pressing surface 502 on the pressure plate 501 abuts against the rear side of the adjusting plate 305. Through the abutment action, the adjusting plate 305 after clockwise rotation is elastically squeezed. Through the elastic squeezing action, the probability of the adjusting plate 305 rotating in the opposite direction after clockwise rotation is reduced due to the long-term effect of the airflow from the third cavity 1103 to the inside of the first cavity 1101 on the front side of the adjusting plate 305, which is subjected to the airflow from the third cavity 1103 to the inside of the first cavity 1101. This facilitates more stable operation during internal circulation.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrically heated forced-air drying oven, comprising: The box (101) has a protective door (102) hinged on the front side, and a transparent observation window (103) is provided on the protective door (102). The box (101) is provided with a control component (104) for controlling the drying operation, and the box (101) has a placement cavity (105) for carrying and placing inside. Its characteristic is that it further includes: An electric heating circulation drying component is installed inside the chamber (101) for electric heating circulation during the drying process; An air circulation component is provided on the housing (101) for air circulation between the inside and outside of the housing (101). The housing (101) is provided with an adjustment component for adjusting the air circulation state and a control component for controlling the air intake and exhaust volume during the air circulation process. And a filter assembly located on the outside of the housing (101) for filtering during the air intake and exhaust process.

2. The electric heating forced-air drying oven according to claim 1, characterized in that: The electrothermal circulating drying assembly includes a first cavity (1101), a second cavity (1102), and a third cavity (1103) that are connected inside the housing (101). The first cavity (1101), the second cavity (1102), and the third cavity (1103) are connected to each other and arranged in a U-shape around the placement cavity (105). An electric heater is installed inside the first cavity (1101). A guide hole (1104) for assisting gas flow is opened between the first cavity (1101) and the placement cavity (105) and between the second cavity (1102) and the placement cavity (105). A fan (1105) for assisting gas circulation is installed inside the third cavity (1103).

3. The electric heating forced-air drying oven according to claim 2, characterized in that: The air circulation assembly includes an air inlet (201) and an air outlet (202) on the housing (101). The third cavity (1103) and the first cavity (1101) are connected to each other and an installation cavity (203) is provided. The air inlet (201) and the air outlet (202) are connected to the interior of the installation cavity (203). The air inlet (201) and the air outlet (202) are arranged symmetrically on the diagonal axis of the installation cavity (203).

4. An electric heating forced-air drying oven according to claim 3, characterized in that: The adjustment assembly includes a first baffle (301) and a second baffle (302) symmetrically fixed inside the first cavity (1101). The third baffle (303) and a fourth baffle (304) are fixed inside the mounting cavity (203). The first baffle (301) and the third baffle (303), as well as the second baffle (302) and the fourth baffle (304), are arranged in a flush position in the vertical direction. An adjustment plate (305) is provided inside the mounting cavity (203). A rotating assembly for rotating the adjustment plate (305) is provided on the housing (101). A pressing assembly for pressing the adjusted plate (305) after rotation is provided inside the mounting cavity (203).

5. An electric heating forced-air drying oven according to claim 3, characterized in that: The control assembly includes a first control plate (701) and a second control plate (702) respectively used to block the air inlet (201) and the air outlet (202) inside the mounting cavity (203). The first control plate (701) and the second control plate (702) are disposed against the inner wall of the mounting cavity (203), and the mounting cavity (203) is provided with a transmission assembly for driving the first control plate (701) and the second control plate (702) and a guide assembly for guiding during the transmission process.

6. An electric heating forced-air drying oven according to claim 5, characterized in that: The transmission assembly includes a first rack (901) and a second rack (902) disposed inside the mounting cavity (203). The first rack (901) and the second rack (902) are fixed to the first control plate (701) and the second control plate (702) respectively. The mounting cavity (203) is rotatably connected to a first mounting shaft (903) and a second mounting shaft (904). A first gear (905) and a second gear (906) are fixed on the first mounting shaft (903) and the second mounting shaft (904) respectively. The first gear (905) meshes with the first rack (901), the first gear (905) meshes with the second gear (906), and the second gear (906) meshes with the second rack (902). An installation motor (907) for driving the first mounting shaft (903) is installed on the outside of the housing (101).

7. An electric heating forced-air drying oven according to claim 5, characterized in that: The guide assembly includes multiple sets of sliding holes (801) opened on the first control plate (701) and the second control plate (702). A guide rod (802) is slidably connected inside the sliding hole (801), and the guide rod (802) is fixed inside the mounting cavity (203).

8. An electric heating forced-air drying oven according to claim 4, characterized in that: The rotating assembly includes a rotating shaft (401) centrally fixed on an adjusting plate (305), and a drive motor (402) for driving the rotating shaft (401) is mounted on the outside of the housing (101).

9. An electric heating forced-air drying oven according to claim 4, characterized in that: The pressing assembly includes a pressure plate (501) disposed inside the mounting cavity (203). The mounting cavity (203) is provided with an elastic component for elastically pushing the pressure plate (501). The adjusting plate (305) is provided with a front side and a rear side. The bottom of the pressure plate (501) is provided with a pressing surface (502) for pressing against the rear side of the adjusting plate (305). One side of the pressure plate (501) is provided with an inclined surface (503) for abutting against the front side of the adjusting plate (305). The elastic component includes multiple sets of slide rods (601) fixed inside the mounting cavity (203). A sleeve (602) is slidably connected to the slide rod (601). One end of the sleeve (602) is fixed to the pressure plate (501). A spring (603) is sleeved on the outside of the sleeve (602). Both ends of the spring (603) are connected to the inner wall of the mounting cavity (203) and the pressure plate (501) respectively.

10. An electric heating forced-air drying oven according to claim 3, characterized in that: The filter assembly includes a mounting groove (1001) opened on the outside of the housing (101), the air inlet (201) and the air outlet (202) are connected to the mounting groove (1001), and a filter plate (1002) is installed inside the mounting groove (1001).

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