Oil-free smoke medical vacuum drying cabinet

Abstract

The utility model relates to a kind of oil fume-free medical vacuum drying cabinet, belong to the technical field of drying device.The medical vacuum drying cabinet includes at least two cabin bodies;The cabin body is fixed in the upper portion of carbon steel frame;Multiple cabin bodies are vertically distributed;The lower portion of carbon steel frame is equipped with the corresponding number of vacuum pump with cabin body;Each vacuum pump is respectively communicated with corresponding cabin body by pipeline, air filter is equipped on the pipeline;The air filter bottom is equipped with manual ball valve, for discharging moisture in air filter;Heat dissipation fan is equipped on the carbon steel frame outside vacuum pump;Sealing door of the cabin body is equipped with door lock piece, door frame of cabin body is equipped with electromagnetic fixing frame, electromagnetic lock is installed on electromagnetic fixing frame, electromagnetic lock is distributed with door lock piece isohigh;The cabin body is equipped with layer plate component.The utility model is equipped with fan heat dissipation, increases air filter and other components, solves the problem that a large amount of oil fume is generated when vacuum drying cabinet works.

Description

Technical Field

[0001] This utility model relates to the technical field of drying devices, specifically to a smokeless medical vacuum drying cabinet. Background Technology

[0002] In the field of medical sterilization, it is essential to ensure that medical devices are thoroughly dried before sterilization. This is particularly important for complex tubular instruments and slender silicone catheters, which are prone to residual moisture. Residual moisture can severely hinder the penetration of sterilizing agents, leading to interrupted sterilization cycles or sterilization failure, thus posing a potential risk of hospital-acquired infections. Medical vacuum drying cabinets, as key equipment for solving these problems, are widely used in hospital central sterile supply departments (CSSDs), endoscopy centers, and laboratories. By creating a negative pressure, low-temperature environment inside the chamber, they significantly lower the boiling point of water, thereby achieving efficient, low-temperature drying of instruments, especially precision instruments, heat-sensitive instruments, and slender tubular instruments.

[0003] Observations of the medical vacuum drying cabinet during operation revealed that the main causes of oil fume generation are as follows: (1) Excessive pump load results in a large volume of gas processed per unit time. Excessive load causes the mechanical components inside the vacuum pump, such as blades and rotor, to bear greater pressure and friction. During high-speed operation, these components experience intense friction with the surrounding lubricating oil and gas, leading to increased energy loss. Some mechanical energy is converted into heat energy, causing the equipment temperature to rise sharply. At the same time, due to the rapid passage of a large amount of gas through the vacuum pump, the gas mixes thoroughly with the lubricating oil inside the pump. Driven by the high-speed airflow, the lubricating oil is violently agitated and forms fine oil droplets. These oil droplets are discharged with the gas, forming the oil fumes we see.

[0004] (2) The pump temperature is too high and cannot be cooled in time. High temperature will change the physical properties of the lubricating oil, reduce its viscosity, and worsen its lubrication performance. At this time, the friction between mechanical parts will increase and wear will accelerate, which will not only affect the service life of the equipment, but also generate more heat, forming a vicious cycle. As the temperature continues to rise, the lubricating oil will gradually vaporize and become oil vapor. These oil vapors mix with the exhaust gas to form oil fumes discharged from the vacuum pump.

[0005] (3) The introduction of a large amount of water vapor, which mixes with the vacuum pump oil. When a large amount of water vapor enters the vacuum pump, it mixes with the vacuum pump oil. Water is denser than vacuum pump oil and is insoluble in it. The two mix to form an unstable emulsion. During the operation of the vacuum pump, this emulsion is subjected to mechanical stirring and high temperature, which causes demulsification. After demulsification, the water in the vacuum pump oil is released, and the oil droplets become smaller and more dispersed. These tiny oil droplets mix with water vapor and exhaust gases, forming a large amount of oil fume. In addition, the presence of water vapor accelerates the oxidation and deterioration of the vacuum pump oil, reduces its lubrication performance and service life, and further aggravates equipment wear and oil fume emission problems.

[0006] (4) The complex structure of the drying cabinet door makes it prone to malfunctions leading to air leakage, which in turn affects the vacuum level and causes the vacuum pump to overwork. The drying cabinet door has a complex structure, usually containing multiple sealing components, connecting components, and control elements. Due to its frequent opening and closing and operation in different temperature and humidity environments, it is prone to malfunctions leading to air leakage. When the drying cabinet door leaks, outside air will enter the drying cabinet, disrupting the original vacuum environment and causing the vacuum level to drop. In order to maintain the set vacuum level, the vacuum pump has to work continuously, or even increase its power, resulting in overwork. Under overwork conditions, the load on the vacuum pump increases, the wear of internal mechanical parts intensifies, and at the same time, the pump body temperature rises, and the consumption and evaporation of lubricating oil accelerates.

[0007] In summary, due to the above reasons, medical vacuum drying cabinets tend to generate a large amount of oil fumes during operation, which is a problem that urgently needs to be solved. Utility Model Content

[0008] To address the problem of oil fumes easily generated during operation in existing medical vacuum drying cabinets, this utility model provides an oil-free medical vacuum drying cabinet to solve the above-mentioned problem.

[0009] The technical solution of this utility model is as follows: A smokeless medical vacuum drying cabinet includes at least two chambers; each chamber is fixed to the upper part of a carbon steel frame; multiple chambers are vertically distributed; the lower part of the carbon steel frame is equipped with a number of vacuum pumps corresponding to the number of chambers; each vacuum pump is connected to its corresponding chamber via a pipe, and each pipe is equipped with an air filter; a manual ball valve is provided at the bottom of each air filter for draining moisture from the air filter; a cooling fan is provided on the carbon steel frame outside the vacuum pumps; a door lock plate is provided on the sealing door of each chamber, and an electromagnetic fixing frame is installed on the door frame of the chamber, with an electromagnetic lock installed on the electromagnetic fixing frame. The electromagnetic lock is distributed at the same height as the door lock plate, and when the electromagnetic lock is energized, it can attract the door lock plate, so that the sealing door is tightly fitted to the door frame of the chamber; a shelf assembly is provided inside the chamber; heating elements are provided on the side of the chamber; the heating elements are in contact with the shelf assembly.

[0010] Furthermore, the vacuum pump is a rotary vane vacuum pump.

[0011] Furthermore, the outer shell of the cabin is welded from aluminum alloy. 5052 aluminum alloy is preferred, as it conducts heat more easily, effectively improving the thermal efficiency of the heating film.

[0012] Furthermore, the shelf assembly consists of an upper shelf, a heating film, and a lower shelf from top to bottom. This arrangement is to prevent the upper shelf from collapsing or deforming over time, while also securing the heating film. Simultaneously, the shelf heating structure can significantly increase the heating rate of the instrument, further improving the drying effect.

[0013] Furthermore, cylindrical reinforcing ribs are welded to the upper surface of the lower plate.

[0014] Furthermore, a sealing strip is installed between the door frame of the chamber and the sealing door. This sealing strip is specifically designed to improve the sealing performance of the drying cabinet. The sealing strip has a Y-shaped cross-section, which increases the contact area between the sealing strip and the door frame of the chamber, resulting in a tighter seal for the drying cabinet.

[0015] Furthermore, multiple cooling fans are arranged in a centrally symmetrical manner at the bottom of the carbon steel frame.

[0016] Furthermore, an air intake pipe is provided on the top of the cabin, and an air return filter is provided on the air intake pipe.

[0017] Furthermore, the shelving assembly is configured as multiple layers inside the cabin.

[0018] The beneficial effects of this utility model are as follows: This invention utilizes a cooling fan installed at the location of the vacuum pump to create powered air convection for better cooling, reducing the pump's heat load and mitigating oil fume emissions. An air filter at the front end of the vacuum pump removes some moisture. This filtered moisture creates localized "non-vacuum zones" within the vacuum area, increasing the pressure difference between the pump's inlet and outlet. The vacuum pump then needs to overcome a greater pressure difference to operate, thus increasing its load. Therefore, a manual ball valve is installed in the air filter to promptly drain the condensate, preventing oil fume production due to high-load operation. This invention also improves the door lock structure, greatly simplifying the door structure while ensuring a good seal, providing greater convenience for opening and closing the door. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the shelf assembly of this utility model.

[0022] Figure 3 This is a structural schematic diagram of the door lock plate, electromagnetic lock, and electromagnetic fixing frame of this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the sealing strip of this utility model.

[0024] Figure 5 This is a cross-sectional view of the sealing strip of this utility model.

[0025] In the diagram, 1-carbon steel frame, 2-sealed door, 3-chamber, 4-layer plate assembly, 5-air filter, 6-return air filter, 7-heating element, 8-vacuum pump, 9-cooling fan, 10-upper plate, 11-heating film, 12-lower plate, 13-door lock plate, 14-electromagnetic lock, 15-electromagnetic fixing frame, 16-manual ball valve, 17-reinforcing rib. Detailed Implementation

[0026] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0027] Example 1 A smokeless medical vacuum drying cabinet includes two chambers 3; the chambers 3 are fixed to the upper part of a carbon steel frame 1; the two chambers 3 are vertically distributed; two vacuum pumps 8 are provided at the lower part of the carbon steel frame 1; each vacuum pump 8 is connected to the corresponding chamber 3 through a pipe, and each pipe is equipped with an air filter 5; a manual ball valve 16 is provided at the bottom of the air filter 5; a cooling fan 9 is provided on the carbon steel frame 1 outside the vacuum pump 8; a door lock plate 13 is provided on the sealing door 2 of the chamber 3, an electromagnetic fixing frame 15 is installed on the door frame of the chamber 3, and an electromagnetic lock 14 is installed on the electromagnetic fixing frame 15. The electromagnetic lock 14 is distributed at the same height as the door lock plate 13. When the electromagnetic lock 14 is energized, it can attract the door lock plate 13, so that the sealing door 2 is tightly fitted to the door frame of the chamber 3; a shelf assembly 4 is provided inside the chamber 3; a heating element 7 is provided on the side of the chamber 3; the heating element 7 is in contact with the shelf assembly 4.

[0028] Example 2 like Figures 1-5 As shown, a smokeless medical vacuum drying cabinet includes two chambers 3, the outer shell of which is welded from 5052 aluminum alloy; the chambers 3 are fixed to the upper part of a carbon steel frame 1; the two chambers 3 are vertically distributed; two rotary vane vacuum pumps 8 are provided at the lower part of the carbon steel frame 1; each vacuum pump 8 is connected to the corresponding chamber 3 through a pipe, and each pipe is equipped with an air filter 5; a manual ball valve 16 is provided at the bottom of the air filter 5; a cooling fan 9 is provided on the carbon steel frame 1 outside the vacuum pump 8, and the two cooling fans 9 are arranged symmetrically at the bottom of the carbon steel frame 1; a door lock plate 13 is provided on the sealing door 2 of the chamber 3, and an electromagnetic fixing bracket 15 is installed on the door frame of the chamber 3. An electromagnetic lock 14 is installed on the magnetic mounting bracket 15. The electromagnetic lock 14 is distributed at the same height as the door lock plate 13. When the electromagnetic lock 14 is energized, it can attract the door lock plate 13, so that the sealed door 2 and the door frame of the cabin 3 are tightly fitted. A sealing strip is installed between the door frame of the cabin 3 and the sealed door 2. The cross-section of the sealing strip is Y-shaped. The cabin 3 has two layers of shelf assemblies 4. The shelf assembly 4 consists of an upper shelf 10, a heating film 11 and a lower shelf 12 from top to bottom. A cylindrical reinforcing rib 17 is welded to the upper surface of the lower shelf 12. A heating plate 7 is provided on the side of the cabin 3. The heating plate 7 is in contact with the shelf assembly 4. An air intake pipe is provided on the top of the cabin 3. An air return filter 6 is provided on the air intake pipe.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A smokeless medical vacuum drying cabinet, comprising at least two chambers; characterized in that, The chamber is fixed to the upper part of a carbon steel frame; multiple chambers are vertically distributed; the lower part of the carbon steel frame is equipped with a number of vacuum pumps corresponding to the number of chambers; each vacuum pump is connected to the corresponding chamber through a pipe, and each pipe is equipped with an air filter; a manual ball valve is provided at the bottom of the air filter to drain moisture from the air filter; a cooling fan is provided on the carbon steel frame outside the vacuum pump; the sealed door of the chamber is equipped with a door lock plate, and an electromagnetic fixing frame is installed on the door frame of the chamber, with an electromagnetic lock installed on the electromagnetic fixing frame. The electromagnetic lock and the door lock plate are distributed at the same height, and the electromagnetic lock can attract the door lock plate when energized, so that the sealed door is tightly fitted to the door frame of the chamber; a shelf assembly is provided inside the chamber; heating plates are provided on the side of the chamber; the heating plates are in contact with the shelf assembly.

2. The smokeless medical vacuum drying cabinet as described in claim 1, characterized in that, The vacuum pump is a rotary vane vacuum pump.

3. The smokeless medical vacuum drying cabinet as described in claim 1, characterized in that, The outer shell of the cabin is formed by welding aluminum alloy.

4. The smokeless medical vacuum drying cabinet as described in claim 1, characterized in that, The layer assembly consists of an upper layer, a heating film, and a lower layer from top to bottom.

5. The smokeless medical vacuum drying cabinet as described in claim 4, characterized in that, The upper surface of the lower plate is welded with cylindrical reinforcing ribs.

6. The smokeless medical vacuum drying cabinet as described in claim 1, characterized in that, A sealing strip is installed between the door frame and the sealing door of the cabin; the cross-section of the sealing strip is Y-shaped.

7. The smokeless medical vacuum drying cabinet as described in claim 1, characterized in that, Multiple cooling fans are arranged in a centrally symmetrical manner at the bottom of the carbon steel frame.

8. The smokeless medical vacuum drying cabinet as described in claim 1, characterized in that, The top of the cabin is equipped with an air intake pipe, and the air intake pipe is equipped with a return air filter.

9. The smokeless medical vacuum drying cabinet as described in claim 1, characterized in that, The shelving assembly is configured as multiple layers inside the cabin.

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