A high vacuum degree hot air circulation oven

Abstract

This utility model relates to the field of vacuum oven technology, specifically disclosing a high-vacuum hot air circulating oven, including a box assembly. The box assembly contains a placement tray assembly for placing objects and a hot air circulation assembly for hot air circulation. Below the placement tray assembly is a filter chamber for intercepting particulate matter, and the top of the filter chamber is threadedly connected to a filter cover. The box assembly includes an oven body. The placement tray assembly includes a support structure fixed to the inner wall of the oven body. A collection tray is detachably connected to the bottom of the support structure, and a drying tray is movably disposed above the support structure. This utility model, through the arrangement of the drying tray and collection tray, allows particulate matter on the material to fall into the collection tray, thus preventing particulate matter from remaining on the surface of the drying tray. The bottom filter chamber filters the incoming airflow, intercepting passing filter material and preventing particulate matter from entering the vacuum pump.

Description

Technical Field

[0001] This utility model relates to the field of vacuum oven technology, and in particular to a high-vacuum hot air circulating oven. Background Technology

[0002] A high-vacuum hot air circulating oven is an industrial drying equipment that combines a vacuum environment with hot air circulation heating technology. By circulating hot air under negative pressure, it achieves rapid and uniform drying of materials while avoiding damage to the materials from high temperatures.

[0003] The high-vacuum hot air circulating oven uses a vacuum pump to reduce the internal air pressure to a negative pressure state, thereby lowering the boiling point of water and allowing the moisture in the material to vaporize and evaporate at a lower temperature.

[0004] In the process of drying materials, the vacuuming process in existing high-vacuum hot air circulating ovens can draw scattered particles into the vacuum pump, which can easily cause the vacuum pump to malfunction and affect the normal use of the high-vacuum hot air circulating oven. Summary of the Invention

[0005] The purpose of this invention is to provide a high-vacuum hot air circulating oven, in which the bottom filter chamber can filter the incoming airflow, intercept the passing filter material, and prevent particulate matter from entering the vacuum pump, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high vacuum hot air circulation oven, comprising a box assembly, wherein the box assembly is provided with a placement tray assembly for placing objects and a hot air circulation assembly for hot air circulation, and a filter chamber for intercepting particulate matter is provided below the placement tray assembly, and a filter cover is threadedly connected to the top of the filter chamber.

[0007] The enclosure assembly includes an oven enclosure;

[0008] The placement tray assembly includes a support structure fixed to the inner wall of the oven, a collection tray detachably connected to the bottom of the support structure, and a drying tray movably disposed above the support structure.

[0009] Preferably, the bottom of the drying tray and the top of the collecting tray are both perforated mesh structures, and two sets of symmetrical L-shaped blocks are provided at the connection between the collecting tray and the supporting structure.

[0010] Preferably, the left and right sides of the collection tray are fixed with supporting side plates.

[0011] Preferably, the chamber assembly further includes two sets of air inlets and outlets located on the rear side of the oven body, an oven door mounted on the front side of the oven body via a hinge, and an observation window embedded inside the oven door.

[0012] Preferably, the hot air circulation assembly includes an air inlet duct corresponding to the upper air inlet and outlet, and an air outlet duct corresponding to the lower air inlet and outlet.

[0013] Preferably, an air duct is fixed to one side of the air inlet duct, and a circulating fan is fixed to the end of the air duct. The output end of the circulating fan is connected to a second connecting pipe, and a heater is fixed to the end of the second connecting pipe. A first connecting pipe is provided between the heater and the air outlet duct.

[0014] Preferably, a vacuum tube is fixedly connected to the bottom of the filter chamber, and a vacuum valve is provided on the vacuum tube, with a vacuum pump installed at the end of the vacuum tube.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. With the setting of drying tray and collection tray, the particulate matter on the material can fall into the inside of the collection tray, thereby avoiding the particulate matter from staying on the surface of the drying tray. In addition, the filter chamber at the bottom can filter the incoming airflow and intercept the passing filter material to prevent particulate matter from entering the vacuum pump.

[0017] 2. The circulating fan achieves hot air circulation through the air inlet and outlet ducts, so that heat is evenly transferred to the surface of the material. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an overall structural view of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the oven body of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the collection tray of this utility model;

[0022] Figure 4 This is a schematic diagram of the hot air circulation component of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Cabinet assembly; 101. Oven body; 102. Oven door; 103. Observation window; 104. Air inlet and outlet; 2. Tray assembly; 201. Drying tray; 202. Support structure; 203. Collection tray; 204. Support side plate; 205. L-shaped locking block; 3. Hot air circulation assembly; 301. Air inlet duct; 302. Air outlet duct; 303. Air duct; 304. Circulating fan; 305. Connecting pipe one; 306. Connecting pipe two; 307. Heater; 4. Vacuum pump; 5. Vacuum valve; 6. Filter chamber; 7. Vacuum extraction pipe; 8. Filter cover. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides a technical solution:

[0027] Please see Figures 1 to 4 A high vacuum hot air circulation oven includes a box assembly 1. Inside the box assembly 1, there is a placement tray assembly 2 for placing objects and a hot air circulation assembly 3 for hot air circulation. Below the placement tray assembly 2, there is a filter chamber 6 for intercepting particulate matter, and the top of the filter chamber 6 is threadedly connected to a filter cover 8.

[0028] The chamber assembly 1 includes an oven chamber 101, and the oven chamber 101 is also provided with the components necessary for an existing oven;

[0029] The placement tray assembly 2 includes a support structure 202 fixed to the inner wall of the oven body 101. A collection tray 203 is detachably connected to the bottom of the support structure 202, and a drying tray 201 is movably arranged above the support structure 202. The bottom of the drying tray 201 and the top of the collection tray 203 are both hollow mesh structures. Two sets of symmetrical L-shaped locking blocks 205 are provided at the connection between the collection tray 203 and the support structure 202. Support side plates 204 are fixed on the left and right sides of the collection tray 203.

[0030] By adopting the above technical solution, the side of the support plate 204 near the inner wall of the oven body 101 can be made of high-temperature resistant silicone. When the collection tray 203 is pulled out, the support plate 204 on the collection tray 203 can move on the inner wall of the oven body 101. Particles on the material can fall into the interior of the collection tray 203 through the perforated mesh of the drying tray 201 and the collection tray 203, which can prevent particles from staying on the surface of the drying tray 201. When air enters through the filter chamber 6, the filter material in the filter chamber 6 can filter and intercept the passing airflow. By rotating the filter cover 8, the filter cover 8 can be opened, and the filter material in the filter chamber 6 can be taken out for replacement. Through the set drying tray 201 and collection tray 203, particles on the material can fall into the interior of the collection tray 203, thereby preventing particles from staying on the surface of the drying tray 201. The bottom filter chamber 6 can filter the incoming airflow and intercept the passing filter material to prevent particles from entering the vacuum pump 4.

[0031] Specifically, such as Figure 2 and Figure 4 As shown, the chamber assembly 1 also includes two sets of air inlets and outlets 104 opened on the rear side of the oven chamber 101, an oven door 102 that is installed on the front side of the oven chamber 101 by hinge rotation, and an observation window 103 embedded inside the oven door 102.

[0032] The hot air circulation assembly 3 includes an air inlet duct 301 corresponding to the upper air inlet / outlet 104 and an air outlet duct 302 corresponding to the lower air inlet / outlet 104. A duct 303 is fixed to one side of the air inlet duct 301, and a circulating fan 304 is fixed to the end of the duct 303. A second connecting pipe 306 is connected to the output end of the circulating fan 304, and a heater 307 is fixed to the end of the second connecting pipe 306. A first connecting pipe 305 is provided between the heater 307 and the air outlet duct 302.

[0033] The bottom of the filter chamber 6 is fixedly connected to a vacuum tube 7, and a vacuum valve 5 is installed on the vacuum tube 7. A vacuum pump 4 is installed at the end of the vacuum tube 7.

[0034] By adopting the above technical solution, filters are installed on both the air inlet and outlet 104. Under the action of the circulating fan 304, the air in the oven body 101 can enter the air inlet duct 301 through the air inlet and outlet 104, and then enter the heater 307 through the air duct 303 and the connecting pipe 306. After being heated by the heater 307, the heated air is discharged into the air outlet duct 302 through the connecting pipe 305, and then re-enters the oven body 101 through the air outlet duct 302 and the air inlet and outlet 104 connected to it, realizing hot air circulation. When the vacuum pump 4 is working, the airflow in the oven body 101 is drawn out through the filter chamber 6 and the vacuum pipe 7, and the hot air is circulated by the circulating fan 304 under the action of the air inlet duct 301 and the air outlet duct 302, so that the heat is evenly transferred to the surface of the material.

[0035] Working principle: The collecting tray 203 is engaged with the bottom of the supporting structure 202 via an L-shaped locking block 205. The bottom of the supporting structure 202 has a slot that matches the L-shaped locking block 205. The material is then placed on the drying tray 201, and the oven door 102 is closed. At this time, the vent valve is closed, the vacuum valve 5 is opened, and the vacuum pump 4 is started. Air inside the oven 101 is extracted through the vacuum pipe 7, and the vacuum gauge reading gradually decreases. When the required vacuum level is reached, the vacuum valve 5 is closed, and the vacuum pump 4 is turned off. Then, the circulating fan 304 and the heater 307 are started. The air inside the oven 101 is circulated by the fan... Under the action of 304, the air can enter the air inlet duct 301 through the air inlet 104, and then enter the heater 307 through the air duct 303 and the connecting pipe 306. After being heated by the heater 307, the heated air is discharged into the air outlet duct 302 through the connecting pipe 305, and then re-enters the oven body 101 through the air outlet 302 and the air inlet 104 connected to it, realizing hot air circulation. After drying, first turn off the power, then turn the vent valve to introduce the atmosphere. After the pressure inside the oven body 101 is balanced, open the oven door 102 to take out the material. All connections must be sealed to avoid air leakage affecting the vacuum degree.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high vacuum degree hot air circulation oven comprising a cabinet assembly (1), characterized in that: The housing assembly (1) is provided with a placement tray assembly (2) for placing objects and a hot air circulation assembly (3) for hot air circulation. A filter chamber (6) for intercepting particulate matter is provided below the placement tray assembly (2), and a filter cover (8) is threadedly connected to the top of the filter chamber (6). The chamber assembly (1) includes an oven chamber (101); The placement tray assembly (2) includes a support structure (202) fixed to the inner wall of the oven body (101), a collection tray (203) is detachably connected to the bottom of the support structure (202), and a drying tray (201) is movably arranged above the support structure (202).

2. The high vacuum heat circulation oven according to claim 1, wherein: The bottom of the drying tray (201) and the top of the collection tray (203) are both hollow mesh structures, and two sets of symmetrical L-shaped blocks (205) are provided at the connection between the collection tray (203) and the support structure (202).

3. The high vacuum heat circulation oven according to claim 2, wherein: The collection tray (203) is fixed with support side plates (204) on the left and right sides.

4. The high vacuum heat circulation oven according to claim 3, wherein: The box assembly (1) also includes two sets of air inlets and outlets (104) opened on the rear side of the oven box (101), an oven door (102) installed on the front side of the oven box (101) by hinge rotation, and an observation window (103) embedded in the oven door (102).

5. The high vacuum heat-air circulation oven according to claim 4, characterized in that: The hot air circulation assembly (3) includes an air inlet duct (301) corresponding to the upper air inlet / outlet (104) and an air outlet duct (302) corresponding to the lower air inlet / outlet (104).

6. A high-vacuum hot air circulating oven according to claim 5, characterized in that: A duct (303) is fixed on one side of the air inlet duct (301), and a circulating fan (304) is fixed at the end of the duct (303). The output end of the circulating fan (304) is connected to a second connecting pipe (306), and a heater (307) is fixed at the end of the second connecting pipe (306). A first connecting pipe (305) is provided between the heater (307) and the air outlet duct (302).

7. A high vacuum heat-air circulation oven according to claim 6, characterized in that: The bottom of the filter chamber (6) is fixedly connected to a vacuum tube (7), and a vacuum valve (5) is provided on the vacuum tube (7). A vacuum pump (4) is installed at the end of the vacuum tube (7).

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