CN214065410U - Medical low-temperature freezing box - Google Patents

Abstract

The utility model belongs to the technical field of mechanical equipment, concretely relates to medical low temperature freezer. The problem of how to realize that the medical low-temperature freezer can realize the balance of internal and external air pressure before opening is solved. This medical low temperature freezer, including the chamber door that has inner panel and planking, be equipped with communicating pipe between inner panel and the planking, the through-hole has all been seted up on planking and the inner panel, the through-hole on communicating pipe one end and the inner panel communicates with each other, be equipped with the check valve between communicating pipe and the planking, the check valve includes valve body and cock body, the valve body is installed in the through-hole of planking and is linked together with the communicating pipe other end, the valve body has the valve chamber cock body in including having elastic press head and being located the end cap of valve intracavity, still be equipped with the fender ring that is located between press head and the end cap in the valve body, intercommunication valve chamber and outside atmospheric runner have still been seted up on the valve body, the inflow of runner is located between press head and the fender ring. The utility model discloses a medical low temperature freezer can realize the balance of inside and outside atmospheric pressure before opening.

Description

Medical low-temperature freezing box

Technical Field

The utility model belongs to the technical field of mechanical equipment, concretely relates to medical low temperature freezer.

Background

Refrigeration equipment is equipment used for refrigeration operation. Different refrigeration methods use different equipment, and the most widely used at present is vapor compression refrigeration, and the main equipment of the method is a compressor, a condenser, an evaporator and a throttle valve. Compressors are used to compress and deliver refrigerant vapor, with piston and centrifugal applications being the broadest.

With the advancement of science and technology, refrigeration is no longer limited to the level of household refrigerators at-20 ℃, and particularly medical low-temperature freezers need to reach lower temperatures: the low temperature of minus 40 ℃ to minus 60 ℃, the ultra-low temperature of minus 86 ℃ and the ultra-low temperature of minus 150 ℃ are used and developed rapidly at home and abroad, but the technical problem that the door of a large-capacity low-temperature storage box is difficult to open due to the over-low refrigeration temperature is generated. The technical reason for difficult door opening is that because the temperature in the refrigerator is low (generally-60 to-150 ℃), the heat enters the refrigerator when the door is opened, the cold is lost, when the door is closed again, the temperature of the gas in the refrigerator is reduced, the gas pressure is reduced, according to the principle of thermal expansion and cold contraction, the external gas pressure is greater than the gas pressure in the refrigerator, and a large pressure difference is generated, so that the door body is difficult to open again, and the articles in the refrigerator can not be obtained in a short time.

Disclosure of Invention

The utility model aims at solving the problems in the prior art, and provides a medical low-temperature freezer, which aims to solve the technical problems that: how to realize the balance of the internal and external air pressures of the medical low-temperature freezing box before opening.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a medical low temperature freezer, is including the chamber door that has inner panel and planking, its characterized in that, be equipped with communicating pipe between inner panel and the planking, all seted up the through-hole on planking and the inner panel, communicating pipe one end communicates with each other with the through-hole on the inner panel, be equipped with the check valve between communicating pipe and the planking, the check valve includes valve body and cock body, the valve body is installed in the through-hole of planking and is linked together with the communicating pipe other end, there is the valve chamber in the valve body the cock body is including having elastic press head and the end cap that is located the valve intracavity, the press head supports with the outer terminal surface of valve body and leans on, still be equipped with the fender ring that is located between press head and the end cap in the valve body, the end cap can offset with keeping off the ring and lean on, still seted up intercommunication valve chamber and outside atmospheric runner on the valve body, the inflow entrance of runner is located between press head and the fender ring.

The space in the box body is isolated from the external space through the box door, the space in the box body can be communicated with the space outside the box body through the through holes, the communicating pipes and the one-way valves which are arranged on the inner plate and the outer plate, the pressing head is abutted against the outer end face of the valve body, the plug can keep the baffle ring abutted against, and the one-way valve is normally closed; when the box door needs to be opened, the pressing head is pressed firstly, so that the pressing head deforms, the plug and the blocking ring do not abut against each other temporarily, at the moment, external gas flows into the valve cavity from the flow channel, enters the communicating pipe from the valve cavity and finally enters the box body, the balance of the air pressure inside and outside the box body is realized, the box door is convenient to open, after the force pressing the pressing head disappears, the pressing head recovers, the plug and the blocking ring abut against each other again, and the normally closed state of the one-way valve is realized.

In the medical cryorefrigerator, the pressing head has an outer surface and an inner wall in a spherical shape protruding outward. The press head surface and the inner wall of sphere form can produce deformation after receiving to press, and the press head surface of sphere form has better surface tension, can be better recovering after being pressed, drive the end cap and remove, make the end cap temporarily not lean on with keeping off the ring counterbalance, at this moment, outside gas flows into the valve pocket from the runner, gets into communicating pipe by the valve pocket and gets into the box at last, realizes the inside and outside atmospheric pressure's of box balance, the opening of the chamber door of being convenient for.

In the medical low-temperature freezer, a connecting rod is arranged between the pressing head and the plug, and a reinforcing rib is arranged between the connecting rod and the inner wall of the pressing head. The pressing head is pressed to drive the plug to move through the connecting rod so as to realize the balance of air pressure inside and outside the box body, and the arrangement of the reinforcing ribs enables the pressing head to have better elastic resetting capability after being pressed.

In the medical low-temperature freezer, the plug is provided with a first conical surface which can be abutted against the stop ring, and the first conical surface faces the pressing head. The plug can have certain aversion to compare original position all can lead to when pressing the press head each time, and through the setting of conical surface one, the plug can reset from the line-up.

In the medical low-temperature freezer, the plug is further provided with a conical surface II opposite to the conical surface I in direction, and the conical surface II is positioned at one end, away from the pressing head, of the plug. The conical surface II is arranged, so that the installation of the plug can be facilitated, and the plug can enter the other side from one side of the baffle ring.

In the medical low-temperature freezer, the outer end face of the valve body is provided with a limiting ring which protrudes outwards and is arranged around the pressing head. When the pressing head is pressed, the pressing force does not act on the pressing head basically vertically, so that the pressing head is likely to shift, and excessive shift of the pressing head can be reduced as much as possible by arranging the limiting ring.

In the medical low-temperature freezer, the plug body is made of rubber materials. The plug body made of the silica gel material has good elastic deformation capacity, and the plug is abutted against the baffle ring and has better sealing performance.

Compared with the prior art, the medical low-temperature freezer has the following advantages:

1. the communicating pipe is arranged in the box door, and the inside and outside air pressure balance in the box body is controlled through the check valve so as to open the box door more conveniently and save labor.

2. The pressing head is deformed by pressing the pressing head, the plug and the baffle ring are temporarily not abutted, at the moment, external gas flows into the valve cavity from the flow channel, enters the communicating pipe from the valve cavity and finally enters the box body, the balance of the internal and external air pressures of the box body is realized, and the box door is convenient to open.

Drawings

Fig. 1 is a schematic diagram of an explosion structure according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of the door.

In the figure, 1, a box door; 1a, an inner plate; 1b, an outer plate; 1c, a through hole; 2. a communicating pipe; 3. a one-way valve; 3a, a valve body; 3a1, valve cavity; 3a2, flow channel; 3a3, baffle ring; 3a4, a stop collar; 3b, a plug body; 3b1, pressing head; 3b2, connecting rod; 3b3, plug; 3b4, reinforcing ribs; 3b31, a first conical surface; 3b32 and a second conical surface.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, a medical low-temperature freezer generally comprises a box body and a box door 1, the box door 1 comprises an inner plate 1a and an outer plate 1b, a communicating pipe 2 is arranged between the inner plate 1a and the outer plate 1b, through holes 1c are respectively arranged on the inner plate 1a and the outer plate 1b, one end of the communicating pipe 2 is communicated with the through hole 1c on the inner plate 1a, a check valve 3 is arranged between the communicating pipe 2 and the outer plate 1b, the check valve 3 comprises a valve body 3a and a plug body 3b, the valve body 3a is clamped in the through hole 1c of the outer plate 1b and is communicated with the other end of the communicating pipe 2, a valve cavity 3a1 is arranged in the valve body 3a, the valve cavity 3a1 is communicated with the communicating pipe 2, the plug body 3b comprises a pressing head 3b1 and a pressing head 3b3 positioned in the valve cavity 3a1, the plug body 3b3 is connected with a plug head 3b1 through a connecting rod 3b2, the plug body 3b is made of rubber material or latex material, has good elastic deformation capability, and is preferably used as a rubber material.

Specifically, as shown in fig. 1 and 2, a stopper ring 3a3 located between the pressing head 3b1 and the plug 3b3 is further provided in the valve body 3a, a flow passage 3a2 communicating the valve cavity 3a1 with the outside atmosphere is further provided in the valve body 3a, an inlet of the flow passage 3a2 is located between the pressing head 3b1 and the stopper ring 3a3, a distance from a bottom surface of the pressing head 3b1 to the plug 3b3 is smaller than a distance from an outer end surface of the valve body 3a to the stopper ring 3a3, so that the pressing head 3b1 abuts against the outer end surface of the valve body 3a, and the plug 3b3 abuts against the stopper ring 3a3 when the pressing head 3b1 does not have an external force.

As shown in fig. 1 and 2, the pressing head 3b1 abuts against the outer end face of the valve body 3a, so that the plug 3b3 can keep the stopper ring 3a3 abutting against, and the check valve 3 is normally closed; when the door 1 needs to be opened, the pressing head 3b1 is pressed first to deform the pressing head 3b1, so that the plug 3b3 is temporarily not abutted against the stop ring 3a3, at this time, external air flows into the valve cavity 3a1 from the flow passage 3a2, enters the communicating pipe 2 from the valve cavity 3a1 and finally enters the box body, so that the balance of the air pressure inside and outside the box body is realized, the door 1 is convenient to open, when the force pressing the pressing head 3b1 disappears, the pressing head 3b1 restores, the plug 3b3 is abutted against the stop ring 3a3 again, and the normally-closed check valve 3 is realized.

Specifically, as shown in fig. 1 and 2, the pressing head 3b1 has an outer surface and an inner wall in a spherical shape protruding outward, and a reinforcing rib 3b4 is provided between the connecting rod 3b2 and the inner wall of the pressing head 3b 1. The outer surface and the inner wall of the spherical pressing head 3b1 can deform after being pressed, the outer surface of the spherical pressing head 3b1 has better surface tension, the spherical pressing head can better recover after being pressed, and the arrangement of the reinforcing ribs 3b4 enables the pressing head 3b1 to have better elastic resetting capability after being pressed.

As shown in fig. 1 and 2, the outer end surface of the valve body 3a is provided with a stopper ring 3a4 which protrudes outward and is provided around the pressing head 3b1, and when the pressing head 3b1 is pressed, since the pressing force does not substantially vertically act on the pressing head 3b1, the pressing head 3b1 may be displaced, and the excessive displacement of the pressing head 3b1 can be reduced as much as possible by providing the stopper ring 3a 4.

As shown in fig. 1 and 2, the plug 3b3 has a first conical surface 3b31 abutting against the stopper ring 3a3, the first conical surface 3b31 is disposed toward the pressing head 3b1, the plug 3b3 has a second conical surface 3b32 opposite to the first conical surface 3b31, and the second conical surface 3b32 is located at the end of the plug 3b 3. Each time the pressing head 3b1 is pressed, the plug 3b3 is displaced to a certain extent from the original position, and the plug 3b3 can be reset by self-centering through the arrangement of the conical surface I3 b 31; the conical surface two 3b32 is provided to facilitate the installation of the plug 3b3, from one side of the stopper ring 3a3 to the other.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (7)

1. A medical low-temperature freezer comprises a freezer door (1) with an inner plate (1a) and an outer plate (1b), and is characterized in that a communication pipe (2) is arranged between the inner plate (1a) and the outer plate (1b), through holes (1c) are formed in the outer plate (1b) and the inner plate (1a), one end of the communication pipe (2) is communicated with the through hole (1c) in the inner plate (1a), a one-way valve (3) is arranged between the communication pipe (2) and the outer plate (1b), the one-way valve (3) comprises a valve body (3a) and a plug body (3b), the valve body (3a) is arranged in the through hole (1c) of the outer plate (1b) and is communicated with the other end of the communication pipe (2), a valve cavity (3a1) is arranged in the valve body (3a), the plug body (3b) comprises an elastic pressing head (3b1) and a plug head (3b3) positioned in the valve cavity (3a1), the outer end face of pressing head (3b1) and valve body (3a) support and lean on, still be equipped with in valve body (3a) and be located fender ring (3a3) between pressing head (3b1) and end cap (3b3), end cap (3b3) can support and lean on with keeping off ring (3a3), still seted up on valve body (3a) and communicate valve pocket (3a1) and outside atmospheric runner (3a2), the inflow mouth of runner (3a2) is located between pressing head (3b1) and the fender ring (3a 3).

2. The medical cryogenic refrigerator according to claim 1, wherein the pressing head (3b1) has an outer surface and an inner wall in a spherical shape protruding outward.

3. The medical cryogenic refrigerator according to claim 1, wherein a connecting rod (3b2) is arranged between the pressing head (3b1) and the plug (3b3), and a reinforcing rib (3b4) is arranged between the connecting rod (3b2) and the inner wall of the pressing head (3b 1).

4. Medical cryogenic refrigerator according to claim 1, characterized in that the stopper (3b3) has a first conical surface (3b31) which can abut against the stop ring (3a3), the first conical surface (3b31) being arranged towards the pressing head (3b 1).

5. Medical cryogenic refrigerator according to claim 4, characterized in that the plug (3b3) is further provided with a second conical surface (3b32) facing opposite to the first conical surface (3b31), and the second conical surface (3b32) is located at one end of the plug (3b3) far away from the pressing head (3b 1).

6. The medical cryogenic refrigerator according to claim 1, 2, 3, 4 or 5, characterized in that the outer end face of the valve body (3a) is provided with a limiting ring (3a4) which protrudes outwards and is arranged around the pressing head (3b 1).

7. Medical cryogenic refrigerator according to claim 1 or 2 or 3 or 4 or 5, characterized in that the plug body (3b) is made of rubber material.

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