Medical refrigeration device with negative pressure release

Abstract

The application discloses a medical refrigeration device capable of releasing negative pressure and relates to the technical field of medical refrigeration devices. The technical scheme is characterized in that the medical refrigeration device comprises a refrigeration device main body, a pressure release mechanism arranged on the refrigeration device main body and used for releasing the negative pressure in the refrigeration device main body when the refrigeration device main body is opened, and a blockage prevention mechanism arranged between the pressure release mechanism and the refrigeration device main body and used for preventing the airflow in the refrigeration device main body from flowing back to the pressure release mechanism. According to the technical scheme, the negative pressure in the refrigeration device main body can be released before the door of the refrigeration device main body is opened, the pressure inside the refrigeration device main body is balanced with the pressure outside the refrigeration device main body, the door can be conveniently opened, and the use experience of a user is improved.

Description

Technical Field

[0001] This invention relates to the field of medical refrigeration equipment technology, and specifically to a medical refrigeration device capable of relieving negative pressure. Background Technology

[0002] Medical refrigeration equipment requires a single-door, large-capacity low-temperature freezer with a storage temperature as low as -40℃ and excellent insulation. During the cooling process, the temperature inside the freezer drops, the air inside contracts, and a huge negative pressure is generated inside the equipment. Because medical refrigeration equipment has a good seal, the air pressure inside the freezer cannot reach equilibrium with the outside air pressure in a short period of time (such as 60 seconds) after the door is closed. As a result, when the user needs to open the door, the strong negative pressure makes it difficult to open the equipment door. This process can even last for about ten minutes, resulting in a poor user experience.

[0003] Therefore, based on this, a design or technical improvement is proposed to solve the above-mentioned problems.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a medical refrigeration device that can relieve negative pressure.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A medical refrigeration device capable of relieving negative pressure includes a main body of the refrigeration device, and further includes:

[0008] The pressure relief mechanism is installed on the main body of the refrigeration equipment and is used to release the negative pressure inside the main body of the refrigeration equipment when the main body of the refrigeration equipment is turned on.

[0009] The anti-blocking mechanism is located between the pressure relief mechanism and the main body of the refrigeration equipment to prevent the airflow in the main body of the refrigeration equipment from flowing back to the pressure relief mechanism.

[0010] Furthermore, the pressure relief mechanism includes a gas storage pipe disposed on the main body of the refrigeration equipment and communicating with the interior of the main body of the refrigeration equipment, a drive and control component disposed in the gas storage pipe, and a piston assembly that slides at the upper limit of the drive and control component, wherein the gas storage pipe has an opening at the opposite end communicating with the main body of the refrigeration equipment.

[0011] Furthermore, the drive control assembly includes a spline shaft with bearings at both ends connected to a bearing bracket disposed within an air storage pipe, and a retaining arm disposed at the lower end of the spline shaft.

[0012] Furthermore, the piston assembly includes a movable sleeve plate adapted to be fitted with the spline shaft and sliding in a sealed manner on the spline shaft, and a piston plate that slides in a sealed manner in the gas storage pipe and has a movable ring groove. The movable sleeve plate has a protruding ring on one side opposite to the piston plate that is movably engaged with the movable ring groove. The piston plate also has a through hole with a diameter larger than that of the spline shaft.

[0013] Furthermore, the movable sleeve plate and the piston plate are respectively provided with vents that can be connected to each other.

[0014] Furthermore, the anti-blocking mechanism includes a connecting chamber with its two ends connected to the main body of the refrigeration equipment and the gas storage pipe, a reverse blocking component disposed in the connecting chamber, and a driving component for driving the reverse blocking component.

[0015] Furthermore, the reverse blocking assembly includes a limiting rod with a limiting plate installed in the connecting compartment to limit the movement of the limiting plate, an abutment plate installed at the lower end of the limiting rod, and a return spring sleeved on the limiting rod and installed between the limiting plate and the limiting rod. A fixing ring frame that abuts and seals against the abutment plate is also provided at the connection port between the connecting compartment and the main body of the refrigeration equipment.

[0016] Furthermore, the drive assembly includes a limiting sleeve disposed on the main body of the refrigeration equipment, a linkage arm connected to the limiting rod and sliding within the limiting sleeve, and a pressure plate disposed at the end of the linkage arm away from the limiting rod. The linkage arm is movably connected to the connecting chamber and slides in a sealed manner relative to the connecting chamber. A push rod is also disposed on the rotating arm, and a wedge-shaped surface adapted to and abutting the push rod is disposed on the pressure plate.

[0017] Furthermore, a torsion spring with one end set on the rotating arm and the other end set on the bearing bracket is also sleeved on the spline shaft.

[0018] Compared with existing technologies, the advantages of this solution are: by setting up a pressure relief mechanism, the negative pressure inside the main body of the refrigeration equipment can be released before opening the door of the main body of the refrigeration equipment, so that the internal pressure is balanced with the external pressure, thereby facilitating opening the door and improving the user experience.

[0019] By setting up a gas storage pipe, a certain amount of gas can be pre-stored. When the main body of the refrigeration equipment is closed, its instantaneous cooling causes the internal air volume to contract, which can draw in the gas in the gas storage pipe to reduce the negative pressure, thus making it easy to open the door shortly after closing it. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 This is a frontal three-dimensional schematic diagram of the present invention;

[0022] Figure 2 This is a three-dimensional schematic diagram of the combination of the pressure relief mechanism and the anti-blocking mechanism in this invention;

[0023] Figure 3 This is a three-dimensional cross-sectional view of the anti-blocking mechanism in this invention;

[0024] Figure 4 This is a three-dimensional schematic diagram of the structure inside the gas storage pipe in this invention;

[0025] Figure 5 This is a three-dimensional cross-sectional view of the pressure relief mechanism in this invention;

[0026] Figure 6 This is a three-dimensional cross-sectional view of the pressure relief mechanism in this invention;

[0027] Figure 7 This is a three-dimensional cross-sectional view of the piston assembly in this invention;

[0028] Figure 8 This is a disassembly diagram of the piston assembly in this invention;

[0029] Figure 9 This is a schematic diagram of the cooperation between the drive control component and the drive component in this invention.

[0030] In the diagram: 1. Main body of refrigeration equipment; 2. Gas storage pipe; 21. Bearing bracket; 22. Splined shaft; 23. Rotating arm; 24. Movable sleeve plate; 25. Movable ring groove; 26. Piston plate; 27. Convex ring; 28. Through hole; 29. ​​Vent; 3. Connecting compartment; 31. Limiting plate; 32. Limiting rod; 33. Sealing plate; 34. Return spring; 35. Fixed ring frame; 36. Limiting sleeve; 37. Linkage arm; 38. Pressure plate; 39. Push rod; 4. Torsion spring. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. 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.

[0032] like Figure 1-9The illustrated medical refrigeration device for relieving negative pressure includes a refrigeration device body 1 and a pressure relief mechanism disposed on the refrigeration device body 1. This mechanism releases negative pressure within the refrigeration device body 1 when it is opened. Due to the high refrigeration efficiency and excellent sealing performance of the refrigeration device body 1, the temperature of the internal airflow drops sharply the instant the door of the refrigeration device body 1 is closed, creating a strong negative pressure inside. The pressure relief mechanism ensures that the pressure difference between the inside and outside of the refrigeration device body 1 is balanced when it needs to be opened, facilitating door opening. An anti-blocking mechanism is disposed between the pressure relief mechanism and the refrigeration device body 1 to prevent backflow of airflow within the refrigeration device body 1. As for the pressure relief mechanism, since it is only used when the door is open, during the cooling process of the main body 1 of the refrigeration equipment, the negative pressure inside it will gradually increase. If the pressure relief mechanism is kept in contact with the inside of the main body 1 of the refrigeration equipment for a long time, the pressure between the two will remain synchronized. As a result, the cold air in the main body 1 of the refrigeration equipment will flow towards the pressure relief mechanism, and the connecting structure between the pressure relief mechanism and the main body 1 of the refrigeration equipment will freeze, causing blockage between the two. Thus, it is impossible to release the pressure of the main body 1 of the refrigeration equipment. Therefore, by setting up the anti-blocking mechanism, the pressure relief mechanism and the main body 1 of the refrigeration equipment are kept isolated during the operation of the main body 1 of the refrigeration equipment to prevent the cold air from flowing back towards the pressure relief mechanism.

[0033] In one embodiment, the pressure relief mechanism includes a gas storage pipe 2 disposed on and communicating with the interior of the refrigeration equipment body 1, a drive and control assembly disposed within the gas storage pipe 2, and a piston assembly that slides at the upper limit of the drive and control assembly. The gas storage pipe 2 has an opening at the opposite end communicating with the refrigeration equipment body 1. The drive and control assembly includes a spline shaft 22 with bearings at both ends connected to a bearing bracket 21 disposed within the gas storage pipe 2, and a retaining arm 23 disposed at the lower end of the spline shaft 22. The piston assembly includes a movable sleeve plate 24 adapted to fit and sealingly slides on the spline shaft 22, and a piston plate 26 sealingly slides within the gas storage pipe 2 and having a movable ring groove 25. A protruding ring 27 is provided on one side of the movable sleeve plate 24 opposite to the piston plate 26, which is movably engaged with the movable ring groove 25. The piston plate 26 also has a hole with a diameter larger than that of the spline shaft 22. The through hole 28, the movable sleeve plate 24, and the piston plate 26 are also provided with vents 29 that can be connected to each other. After the door of the main body 1 of the refrigeration equipment is closed, the gradually increasing negative pressure inside will cause the gas in the gas storage pipe 2 to be drawn away, which will cause the piston plate 26 to drive the movable sleeve plate 24 to move upward, thus creating a negative pressure in the gas storage pipe 2. When it is necessary to open the door, the spline shaft 22 is driven to rotate by the buckling arm 23, which will then drive the movable sleeve plate 24 and the piston plate 26 to rotate relative to each other, so that the vents 29 on the movable sleeve plate 24 and the piston plate 26 are connected to each other, thus connecting the closed chamber in the gas storage pipe 2 with the outside, and allowing the main body 1 of the refrigeration equipment to draw air to the outside through the gas storage pipe 2, so that the internal pressure gradually balances with the outside pressure, making it easier to open the door.

[0034] In one embodiment, the anti-blocking mechanism includes a connecting chamber 3 with its two ends connected to the main body 1 of the refrigeration equipment and the gas storage pipe 2, a reverse-blocking component disposed within the connecting chamber 3, and a driving component for driving the reverse-blocking component. The reverse-blocking component includes a limiting rod 32 with a limiting plate 31 installed within the connecting chamber 3 to limit its movement, a sealing plate 33 disposed at the lower end of the limiting rod 32, and a return spring 34 sleeved on the limiting rod 32 and disposed between the limiting plate 31 and the limiting rod 32. A fixing ring 35 is also provided at the connection opening between the connecting chamber 3 and the main body 1 of the refrigeration equipment to seal against the sealing plate 33. When the door of the main body 1 of the refrigeration equipment is closed, the gradually increasing negative pressure inside it will suck the sealing plate 33 downward to separate it from the fixing ring 35, thereby opening the connection. The communication channel between compartment 3 and the main body of the refrigeration equipment 1 is then established. The main body of the refrigeration equipment 1 will then extract the gas from the gas storage pipe 2. During the extraction process, the negative pressure inside the main body of the refrigeration equipment 1 is balanced, making the door easy to open. When the movable sleeve 24 moves upward to a fixed position and can no longer move upward, the pressure inside the main body of the refrigeration equipment 1 will gradually decrease, and the door will become difficult to open. When the gas temperature inside the main body of the refrigeration equipment 1 no longer decreases and the volume change stabilizes, the limit rod 32 will rebound under the action of the return spring 34, thereby driving the sealing plate 33 to move upward and abut against the fixed ring frame 35, thus closing the communication channel between compartment 3 and the main body of the refrigeration equipment 1 to prevent cold air from diffusing into the communication structure and causing freezing and blockage.

[0035] In one embodiment, the driving assembly includes a limiting sleeve 36 disposed on the main body 1 of the refrigeration equipment, a linkage arm 37 connected to a limiting rod 32 and sliding within the limiting sleeve 36, and a pressure plate 38 disposed at the end of the linkage arm 37 away from the limiting rod 32. The linkage arm 37 is movably connected to the connecting chamber 3 and slides in a sealed manner relative to the connecting chamber 3. A push rod 39 is also disposed on the rotating arm 23, and a wedge-shaped surface adapted to abut against the push rod 39 is disposed on the pressure plate 38. When pressure needs to be released inside the main body 1 of the refrigeration equipment, the rotating arm 23 needs to be rotated, thereby driving the spline shaft 22 and the movable sleeve 24 to rotate, so that the closed chamber inside the gas storage pipe 2 and the gas storage pipe 2 can be closed together. The external connection is established, allowing airflow to be introduced from the outside. However, since the sealing plate 33 and the fixed ring frame 35 are still closed, the external airflow will only enter the interior of the gas storage pipe 2 and cannot enter the main body of the refrigeration equipment 1. At this time, a linkage arm 37 needs to be set on the limiting rod 32. Then, by rotating the locking arm 23, the pushing rod 39 abuts against the pressure plate 38 at the lower end of the linkage arm 37, thereby driving the linkage arm 37 to move downward. This allows the linkage arm 37 to drive the limiting rod 32 to move downward, opening the channel between the connecting chamber 3 and the main body of the refrigeration equipment 1, and allowing external airflow to be introduced into the main body of the refrigeration equipment 1 for pressure balance.

[0036] In one embodiment, a torsion spring 4 is also sleeved on the spline shaft 22, with one end set on the retaining arm 23 and the other end set on the bearing bracket 21. After releasing the pressure inside the main body 1 of the refrigeration equipment and completing the subsequent operations, in order to prevent the operator from forgetting to return the retaining arm 23 when closing the door, which would cause the cold air in the main body 1 of the refrigeration equipment to overflow to the outside, the torsion spring 4 is set so that the retaining arm 23 will automatically reset after the negative pressure inside the main body 1 of the refrigeration equipment is released, thereby causing the movable sleeve 24 and the vent 29 on the piston plate 26 to be misaligned, so as to close the communication channel between the gas storage pipe 2 and the outside, and ensure the good airtightness of the main body 1 of the refrigeration equipment.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A medical refrigeration device capable of relieving negative pressure, comprising a refrigeration device body (1), characterized in that: include: A pressure relief mechanism is installed on the main body (1) of the refrigeration equipment to release the negative pressure inside the main body (1) of the refrigeration equipment when the main body (1) is turned on; An anti-blocking mechanism is set between the pressure relief mechanism and the main body (1) of the refrigeration equipment to prevent the airflow in the main body (1) of the refrigeration equipment from flowing back to the pressure relief mechanism; The pressure relief mechanism includes a gas storage pipe (2) disposed on the main body (1) of the refrigeration equipment and communicating with the interior of the main body (1), a drive and control component disposed in the gas storage pipe (2), and a piston assembly that slides at the upper limit of the drive and control component. The gas storage pipe (2) has an opening at the opposite end that communicates with the main body (1) of the refrigeration equipment. The drive control assembly includes a spline shaft (22) with bearings at both ends connected to a bearing bracket (21) located inside the air storage pipe (2) and a retaining arm (23) located at the lower end of the spline shaft (22). The piston assembly includes a movable sleeve plate (24) adapted to be fitted with the splined shaft (22) and sliding in a sealed manner on the splined shaft (22), and a piston plate (26) that slides in a sealed manner in the gas storage pipe (2) and has a movable ring groove (25). The movable sleeve plate (24) has a protruding ring (27) on one side opposite to the piston plate (26) that is movably engaged with the movable ring groove (25). The piston plate (26) also has a through hole (28) with a diameter larger than that of the splined shaft (22). The movable sleeve plate (24) and piston plate (26) are also provided with vents (29) that can be connected to each other.

2. The medical refrigeration device capable of relieving negative pressure according to claim 1, characterized in that: The anti-blocking mechanism includes a connecting chamber (3) with its two ends connected to the main body (1) of the refrigeration equipment and the gas storage pipe (2) respectively, a reverse blocking component installed in the connecting chamber (3), and a driving component for driving the reverse blocking component.

3. A medical refrigeration device capable of relieving negative pressure according to claim 2, characterized in that: The reverse blocking assembly includes a limiting rod (32) with a limiting plate (31) installed in the connecting compartment (3) to limit the movement of the limiting rod (32), an abutment plate (33) installed at the lower end of the limiting rod (32), and a reset spring (34) sleeved on the limiting rod (32) and installed between the limiting plate (31) and the limiting rod (32). A fixing ring frame (35) that abuts and seals against the abutment plate (33) is also provided at the connection port between the connecting compartment (3) and the main body of the refrigeration equipment (1).

4. A medical refrigeration device capable of relieving negative pressure according to claim 3, characterized in that: The drive assembly includes a limiting sleeve (36) on the main body (1) of the refrigeration equipment, a linkage arm (37) connected to the limiting rod (32) and sliding within the limiting sleeve (36), and a pressure plate (38) on the end of the linkage arm (37) away from the limiting rod (32). The linkage arm (37) is movably connected to the connecting chamber (3) and slides in a sealed manner relative to the connecting chamber (3). A push rod (39) is also provided on the rotating arm (23), and a wedge-shaped surface that is adapted to and abuts the push rod (39) is provided on the pressure plate (38).

5. A medical refrigeration device capable of relieving negative pressure according to claim 4, characterized in that: A torsion spring (4) with one end set on the rotating arm (23) and the other end set on the bearing bracket (21) is also sleeved on the spline shaft (22).

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