Thermoplastic film constant temperature drying oven

Abstract

The utility model provides a thermoplastic film constant temperature drying oven, including drying oven body, the inside top of drying oven body is equipped with the flow -equalizing plate, the flow -equalizing plate end connects L shape baffle front end, the baffle end connects drying oven body backplate, the drying oven body top plate and flow -equalizing plate and baffle form L type distribution air duct between, drying oven body back upper side fixed centrifugal fan, centrifugal fan air outlet communicates distribution air duct initial section, distribution air duct initial section is equipped with PTC ceramic heating element and is close to centrifugal fan air outlet, the flow -equalizing plate is equipped with a plurality of first through -hole, the flow -equalizing plate below is equipped with at least one placing plate, the bottom of drying oven body is provided with return air grille, return air grille and drying oven body bottom plate form return air passage between, return air passage passes through drying oven body backplate and communicates outside. The utility model avoids using water bath, and the film after heating has water droplet and is contacted patient skin, reduces the patient and catch a cold probability of feeling cold.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a thermoplastic film constant temperature drying oven. Background Technology

[0002] In radiotherapy for cancer patients, thermoplastic membranes are currently widely used to fix the body, ensuring precise irradiation of the tumor target area during treatment. When fixing patients with thermoplastic membranes, the radiotherapy department typically uses a constant-temperature water tank to heat the membrane. The membrane is placed in the tank and heated until softened, then removed, dried as much as possible, and placed on the patient's body surface to cool and set. In winter, this increases patient discomfort and significantly increases the likelihood of frail cancer patients catching a cold. Summary of the Invention

[0003] To address the above problems, this utility model provides a thermoplastic film constant temperature drying oven.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a thermoplastic film constant temperature drying oven, comprising a drying oven body, a flow equalization plate provided at the top of the drying oven body, an L-shaped partition connected to the front end of the flow equalization plate, and the partition connected to the back plate of the drying oven body, an L-shaped distribution air duct formed between the top plate of the drying oven body, the flow equalization plate, and the partition, a centrifugal fan fixed in the upper middle of the back of the drying oven body, the outlet of the centrifugal fan connected to the starting section of the distribution air duct, a PTC ceramic heating element provided in the starting section of the distribution air duct and closely attached to the outlet of the centrifugal fan, a plurality of first through holes provided in the flow equalization plate, at least one placement plate provided below the flow equalization plate, a return air grille provided at the bottom of the drying oven body, a return air channel formed between the return air grille and the bottom plate of the drying oven body, and the return air channel penetrating the back plate of the drying oven body and connecting to the outside.

[0005] Preferably, the placement plate is a drawer type, with sliders fixed on both the left and right sides of the placement plate. The inner side walls of the drying oven body are provided with at least one set of slides, and the sliders match the shape and size of the slides. The front end of the placement plate is provided with a handle.

[0006] Preferably, the bottom of the placement plate is provided with a plurality of second through holes, the diameter of which is 3-8mm.

[0007] Preferably, the angle between the grille bars of the return air grille and the front panel of the dry oven body is 30°-60°, and the gap between the grille bars of the return air grille is 8-12mm.

[0008] Preferably, the inner wall of the drying oven is fixed with insulation boards.

[0009] Preferably, the initial section of the distribution duct is equipped with an outlet air temperature sensor, and the middle section of the return air duct is equipped with a return air temperature sensor. Both the return air temperature sensor and the outlet air temperature sensor are electrically connected to a PID temperature controller to receive signals. The PID temperature controller is electrically connected to a PTC ceramic heating element and a centrifugal fan to transmit control signals. The PID temperature controller, the return air temperature sensor, the outlet air temperature sensor, the PTC ceramic heating element, and the centrifugal fan are all electrically connected to a power supply.

[0010] Preferably, the sum of the widths of the placement plate and the left and right side sliders is equal to the width between the same set of slides, and the length and width of the placement plate are both greater than the length and width of the thermoplastic film.

[0011] Preferably, the length of the slide is less than the length of the dry oven body, a baffle is provided at the end of the slide, and the end of the slider is flush with the end of the placement plate.

[0012] Preferably, the diameter of the first through hole is 3-8 mm.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses a PTC ceramic heating element and a centrifugal fan for heating, avoiding the use of a water bath, preventing the membrane with water droplets from contacting the patient's skin after heating, reducing the chance of the patient catching a cold, and reducing the time spent wiping and waiting, thus reducing the risk of cross-infection; the return air temperature sensor and the outlet air temperature sensor are used to detect the temperature and upload the temperature data to the PID temperature controller. The PID temperature controller controls the start and stop of the PTC ceramic heating element and the centrifugal fan according to the preset temperature to achieve the heating and softening of the thermoplastic film. Attached Figure Description

[0014] Figure 1 This is a front sectional view of the thermoplastic film constant temperature drying oven of this utility model.

[0015] Figure 2 This is a side sectional view of the thermoplastic film constant temperature drying oven of this utility model.

[0016] Figure 3 This is a rear view of the thermoplastic film constant temperature drying oven of this utility model.

[0017] Figure 4 This is a schematic diagram illustrating the working principle of the thermoplastic film constant temperature drying oven of this utility model.

[0018] Figure descriptions: 1. Drying oven body, 11. Distribution air duct, 12. Return air duct, 13. Flow equalization plate, 14. First through hole, 15. Baffle, 2. Insulation plate, 3. Placement plate, 31. Second through hole, 32. Handle, 4. Slide rail, 41. Slider, 42. Baffle, 5. Return air grille, 6. Return air temperature sensor, 7. Outlet air temperature sensor, 8. PTC ceramic heating element, 9. Centrifugal fan. Detailed Implementation

[0019] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0020] Please refer to the reference. Figure 1 , Figure 2 and Figure 3 An embodiment of the present invention provides a thermoplastic film constant temperature drying oven, comprising a drying oven body 1. A flow equalization plate 13 is provided at the top of the drying oven body 1. The end of the flow equalization plate 13 is connected to the front end of an L-shaped partition 15. The end of the partition 15 is connected to the back plate of the drying oven body 1. An L-shaped distribution air duct 11 is formed between the top plate of the drying oven body 1, the flow equalization plate 13, and the partition 15. A centrifugal fan 9 is fixed in the upper middle part of the back of the drying oven body 1. The outlet of the centrifugal fan 9 is connected to the starting section of the distribution air duct 11. A PTC ceramic heating element 8 is provided in the starting section of the distribution air duct 11 and is closely attached to the outlet of the centrifugal fan 9. The flow equalization plate 13 is provided with several first through holes 14. At least one placement plate 3 is provided below the flow equalization plate 13. A return air grille 5 is provided at the bottom of the drying oven body 1. A return air channel 12 is formed between the return air grille 5 and the bottom plate of the drying oven body 1. The return air channel 12 passes through the back plate of the drying oven body 1 and connects to the outside.

[0021] Heating is achieved using a PTC ceramic heating element 8 and a centrifugal fan 9, avoiding the use of a water bath and preventing the heated film from coming into contact with the patient's skin, thus reducing the chance of the patient catching a cold. It also reduces the time spent wiping and waiting, thereby reducing the risk of cross-infection. The air blown in by the centrifugal fan 9 enters the distribution duct 11, where the cross-section suddenly increases, the wind speed decreases, and the dynamic pressure is converted into static pressure, making the heated air evenly distributed. The hot air passes through the first through hole 14 of the flow equalization plate 13 to form multiple vertically downward airflows with uniform flow rates, which are evenly blown onto the surface of the thermoplastic film on the placement plate 3. The return air grille 5 is used to guide the airflow and prevent the hot air from flowing back.

[0022] In one embodiment, such as Figure 1 and Figure 2 As shown, the placement plate 3 is a drawer type, which is convenient for placing and taking out thermoplastic film. Slider 41 is fixed on both the left and right sides of the placement plate 3. At least one set of slide rails 4 are provided on the inner side walls of the drying oven body 1. The slider 41 matches the shape and size of the slide rail 4. A handle 32 is provided at the front end of the placement plate 3.

[0023] In one embodiment, such as Figure 1 and Figure 2 As shown, the bottom of the placement plate 3 is provided with several second through holes 31, the diameter of which is 3-8mm, to facilitate the transfer of hot air to the lower placement plate 3.

[0024] In one embodiment, such as Figure 1 and Figure 2 As shown, the inner wall of the drying oven body 1 is fixed with heat insulation board 2 to reduce heat loss and ensure heating effect.

[0025] In one embodiment, such as Figure 2 As shown, the angle between the grille bars of the return air grille 5 and the front panel of the dry oven body 1 is 30°-60°, and the gap between the grille bars of the return air grille 5 is 8-12mm to ensure sufficient return air area, prevent foreign objects from entering, and ensure safety.

[0026] In one embodiment, such as Figure 2 and Figure 4 As shown, the initial section of the distribution duct 11 is equipped with an outlet air temperature sensor 7, and the middle section of the return air duct 12 is equipped with a return air temperature sensor 6. Both the return air temperature sensor 6 and the outlet air temperature sensor 7 are electrically connected to a PID temperature controller to receive signals. The PID temperature controller is electrically connected to a PTC ceramic heating element 8 and a centrifugal fan 9 to transmit control signals. The PID temperature controller, the return air temperature sensor 6, the outlet air temperature sensor 7, the PTC ceramic heating element 8, and the centrifugal fan 9 are all electrically connected to a power supply. The return air temperature sensor 6 and the outlet air temperature sensor 7 are used to detect the temperature and upload the temperature data to the PID temperature controller. The PID temperature controller controls the start and stop of the PTC ceramic heating element 8 and the centrifugal fan 9 according to the preset temperature to achieve the heating and softening of the thermoplastic film.

[0027] This invention does not improve the PID temperature controller, return air temperature sensor 6, and outlet air temperature sensor 7. The return air temperature sensor 6 and outlet air temperature sensor 7 are both Pt100 platinum resistance thermometers, and the PID temperature controller is an Omron E5EC-T.

[0028] In one embodiment, such as Figure 1 and Figure 2 As shown, the sum of the widths of the placement plate 3 and the left and right side sliders 41 is equal to the width between the same set of slides 4, ensuring that the placement plate 3 is placed stably. The length and width of the placement plate 3 are both greater than the length and width of the thermoplastic film, ensuring that the thermoplastic film can be placed flat on the placement plate 3, and leaving an uncovered second through hole 31 to facilitate the transfer of hot air to the lower placement plate 3.

[0029] In one embodiment, such as Figure 2 As shown, the length of the slide 4 is less than the length of the dry oven body 1, ensuring that there is a gap to facilitate the transfer of hot air to the lower placement plate 3. A baffle 42 is provided at the end of the slide 4, and the end of the slider 41 is flush with the end of the placement plate 3. The length of the lower placement plate 3 is greater than that of the upper placement plate 3, which facilitates the transfer of hot air to the lower placement plate 3.

[0030] In one embodiment, such as Figure 1 and Figure 2 As shown, the diameter of the first through hole 14 is 3-8mm, and the first through hole 14 is arranged in an equilateral triangle to make the airflow distribution uniform.

[0031] Usage: Combine Figures 1-4 As shown, the centrifugal fan 9 operates, drawing in room temperature air from the back of the dry oven body 1. The air is immediately pushed through the adjacent PTC ceramic heating element 8 and rapidly heated. The heated air enters the distribution duct 11, where the cross-section suddenly increases, the wind speed decreases, and the dynamic pressure is converted into static pressure, making the heated air evenly distributed. The hot air passes through the first through hole 14 of the flow equalization plate 13 to form multiple vertically downward airflows with uniform flow rates, which evenly blow onto the surface of the thermoplastic film on the placement plate 3. The air temperature drops slightly after passing over the thermoplastic film. Under the negative pressure of the dry oven body 1, it passes through the bottom return air grille 5 and enters the bottom return air channel 12. The returned air mixes with some of the replenished fresh air and is drawn in again by the centrifugal fan 9 to start the next cycle.

[0032] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A thermoplastic film constant temperature drying oven, characterized in that: The oven includes a dry oven body (1), with a flow equalization plate (13) at the top inside the dry oven body (1). The end of the flow equalization plate (13) is connected to the front end of an L-shaped partition (15), and the end of the partition (15) is connected to the back plate of the dry oven body (1). An L-shaped distribution air duct (11) is formed between the top plate of the dry oven body (1), the flow equalization plate (13), and the partition (15). A centrifugal fan (9) is fixed in the upper middle part of the back of the dry oven body (1), and the outlet of the centrifugal fan (9) is connected to the beginning of the distribution air duct (11). The distribution air duct (11) has a PTC ceramic heating element (8) at the beginning and is close to the air outlet of the centrifugal fan (9). The flow equalization plate (13) has several first through holes (14). At least one placement plate (3) is provided below the flow equalization plate (13). The bottom of the dry oven body (1) is provided with a return air grille (5). The return air grille (5) and the bottom plate of the dry oven body (1) form a return air channel (12). The return air channel (12) passes through the back plate of the dry oven body (1) and connects to the outside.

2. The thermoplastic film constant temperature drying oven as described in claim 1, characterized in that: The placement plate (3) is a drawer type. Slider (41) is fixed on both the left and right sides of the placement plate (3). At least one set of slide rails (4) is provided on the inner side walls of the dry oven body (1). The slider (41) matches the shape and size of the slide rail (4). The front end of the placement plate (3) is provided with a handle (32).

3. The thermoplastic film constant temperature drying oven as described in claim 1, characterized in that: The bottom of the placement plate (3) is provided with several second through holes (31), the diameter of which is 3-8mm.

4. The thermoplastic film constant temperature drying oven as described in claim 1, characterized in that: The angle between the grille bars of the return air grille (5) and the front plate of the dry oven body (1) is 30°-60°, and the gap between the grille bars of the return air grille (5) is 8-12mm.

5. The thermoplastic film constant temperature drying oven as described in claim 1, characterized in that: The inner wall of the dry oven body (1) is fixed with insulation board (2).

6. The thermoplastic film constant temperature drying oven as described in claim 1, characterized in that: The distribution duct (11) is equipped with an outlet air temperature sensor (7) at the beginning section and a return air temperature sensor (6) is equipped in the middle of the return air duct (12). The return air temperature sensor (6) and the outlet air temperature sensor (7) are electrically connected to a PID temperature controller to receive signals. The PID temperature controller is electrically connected to a PTC ceramic heating element (8) and a centrifugal fan (9) to transmit control signals. The PID temperature controller, the return air temperature sensor (6), the outlet air temperature sensor (7), the PTC ceramic heating element (8), and the centrifugal fan (9) are all electrically connected to a power supply.

7. The thermoplastic film constant temperature drying oven as described in claim 2, characterized in that: The sum of the widths of the placement plate (3) and the left and right side sliders (41) is equal to the width between the same set of slides (4). The length and width of the placement plate (3) are both greater than the length and width of the thermoplastic film.

8. The thermoplastic film constant temperature drying oven as described in claim 2, characterized in that: The length of the slide (4) is less than the length of the dry oven body (1), and a baffle (42) is provided at the end of the slide (4). The end of the slider (41) is flush with the end of the placement plate (3).

9. The thermoplastic film constant temperature drying oven as described in claim 1, characterized in that: The diameter of the first through hole (14) is 3-8 mm.

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