CN116951873A - Refrigerator door opening pressure balancing device - Google Patents
Refrigerator door opening pressure balancing device Download PDFInfo
- Publication number
- CN116951873A CN116951873A CN202310912365.0A CN202310912365A CN116951873A CN 116951873 A CN116951873 A CN 116951873A CN 202310912365 A CN202310912365 A CN 202310912365A CN 116951873 A CN116951873 A CN 116951873A
- Authority
- CN
- China
- Prior art keywords
- channel
- piston column
- strip
- shaped groove
- sealing ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 238000009423 ventilation Methods 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
- F25D17/047—Pressure equalising devices
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention discloses a refrigerator door opening pressure balancing device which comprises a connecting piece, wherein a channel is arranged in the connecting piece, an annular groove is formed in the inner wall of the channel, a sealing ring is arranged in the annular groove, a piston column capable of moving axially is arranged in the channel, a strip-shaped groove is formed in the side wall of the piston column, the first end of the strip-shaped groove is positioned at the first end of the piston column, an annular baffle is fixedly arranged on the outer wall of the first end of the piston column, the second end of the strip-shaped groove is positioned on the side wall of the piston column, a sealing part is formed between the second end of the strip-shaped groove and the second end of the piston column, the sealing part penetrates through the sealing ring and is in interference fit with the sealing ring, a spring is sleeved on the piston column, one end of the spring is in contact with an annular boss arranged on the inner wall of the channel, and the other end of the spring is in contact with the annular baffle. When the door is opened, the first end of the piston column is pressed, the balance of the internal pressure and the external pressure of the refrigerator is realized by opening the channel, manual operation is not needed after the door is opened, the channel is automatically closed, the sealing is ensured, and the phenomenon of cold leakage does not exist.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator door opening pressure balancing device.
Background
The refrigerator generally has a negative pressure phenomenon in the use process, and the formation process is approximately as follows: after the door body is opened, the inside and the outside of the refrigerator compartment are subjected to gas exchange, and external hot air enters the refrigerator compartment; after the door body is closed, the temperature of the hot air in the compartment is gradually reduced under the action of refrigeration, and the pressure in the compartment is reduced, so that the pressure difference is formed between the inside and the outside of the refrigerator. This results in a great effort being required by the user to open the door.
In the prior art, aiming at the technical problem, a plurality of technical schemes for pressure relief to balance the pressure inside and outside the refrigerator are designed, and the most common scheme is to arrange a gas channel communicated with the space inside and outside the refrigerator so as to realize the balance of the pressure inside and outside the refrigerator, but the gas channel involved in the technical scheme has the problems that a user cannot control autonomously, cold leakage and the like; in addition, the low temperature of the refrigerator can lead to frosting at the position of the gas channel, and the gas channel can be blocked for a long time, so that the air pressure balance effect is affected.
There is a need for improvements in the art.
Disclosure of Invention
The invention aims to provide a refrigerator door opening pressure balancing device, which aims to at least solve one of the technical problems in the prior art, and adopts the following technical scheme to realize the purposes:
the refrigerator door opening pressure balancing device comprises a connecting piece, wherein a channel is arranged in the connecting piece, a limiting cover plate is arranged at one end of the channel, a through hole is formed in the limiting cover plate, a ventilation cover plate is arranged at the other end of the channel, and a plurality of first ventilation holes are formed in the ventilation cover plate;
the inner wall of the channel is provided with an annular groove, a sealing ring is arranged in the annular groove, and the channel is divided into a left cavity and a right cavity;
the piston is characterized in that a piston column capable of moving axially is arranged in a cavity close to the limit cover plate, a strip-shaped groove is formed in the side wall of the piston column, the first end of the strip-shaped groove is located at the first end of the piston column, the first end of the piston column penetrates through the through hole, an annular baffle is fixedly arranged on the outer wall of the first end of the piston column and located in the channel, a second ventilation hole is formed between the annular baffle and the strip-shaped groove, the second end of the strip-shaped groove is located on the side wall of the piston column, a sealing part is formed between the second end of the strip-shaped groove and the second end of the piston column, the sealing part penetrates through the sealing ring and is in interference fit with the sealing ring, and a third ventilation hole is formed between the sealing ring and the strip-shaped groove when the piston column is moved until the sealing part completely penetrates through the sealing ring;
the piston column is sleeved with a spring, the spring is in a compressed state, one end of the spring is in contact with an annular boss arranged on the inner wall of the channel, the other end of the spring is in contact with the annular baffle, and the annular baffle is in close contact with the limiting cover plate under the action of the spring.
Preferably, the maximum friction between the sealing portion and the sealing ring is smaller than the minimum elastic force during the deformation of the spring.
Preferably, the length direction of the strip-shaped groove is arranged along the length direction of the piston column.
Preferably, the strip-shaped grooves are provided with a plurality of strips, and the strips are arranged at equal intervals along the circumferential direction of the piston column.
Preferably, the outer wall of the annular baffle is in clearance fit with the inner wall of the channel.
Preferably, the sealing ring is made of rubber.
Compared with the prior art, the invention has the following beneficial effects:
according to the refrigerator door opening pressure balancing device, when the refrigerator is opened, the channel is opened by pressing the first end of the piston column, so that the balance of the internal pressure and the external pressure of the refrigerator is realized, a user can conveniently open the refrigerator door, the channel is automatically closed without manual operation after the user releases hands, the sealing is ensured, the phenomenon of cold leakage is avoided, and the refrigerating effect is ensured. In addition, the device has the advantages of simple structure, convenient operation for users, no occupation of space and no influence on the external appearance of the refrigerator.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the overall structure of the present invention.
FIG. 2 is a schematic view of the internal structure of the channel according to the present invention.
Fig. 3 is a schematic view of the internal assembly of the inventive channel.
FIG. 4 is a schematic view of the seal ring structure of the present invention.
Fig. 5 is a schematic view of the piston-cylinder structure of the present invention.
Fig. 6 is a schematic view of the airway opening of the present invention.
In the figure: 1. a connecting piece; 2. a channel; 3. a limit cover plate; 4. a through hole; 5. a vent cover plate; 6. a first vent hole; 7. an annular groove; 8. a seal ring; 9. a piston column; 10. a strip-shaped groove; 11. an annular baffle; 12. a second vent hole; 13. a sealing part; 14. a third vent hole; 15. a spring; 16. an annular boss.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Furthermore, in the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 4, a preferred embodiment of the present invention provides a door opening pressure balancing device for a refrigerator, which includes a connecting piece 1, wherein the connecting piece 1 is cylindrical, a through channel 2 is provided in the connecting piece 1 along an axial direction of the connecting piece 1, a limiting cover plate 3 is fixedly installed at one end of the channel 2, a through hole 4 communicating with the inside and the outside of the channel 2 is provided on the limiting cover plate 3, a ventilation cover plate 5 is fixedly installed at the other end of the channel 2, and a plurality of first ventilation holes 6 communicating with the inside and the outside of the channel 2 are provided on the ventilation cover plate 5.
The inner wall of the middle position of the channel 2 is provided with an annular groove 7, a sealing ring 8 is fixedly arranged in the annular groove 7, and the channel is divided into a left cavity and a right cavity. Wherein the sealing ring 8 is made of elastic material, rubber is preferably adopted in the invention.
An axially movable piston column 9 is installed in a cavity close to the limit cover plate 3, as shown in fig. 5, a strip-shaped groove 10 is arranged on the side wall of the piston column 9, a first end of the strip-shaped groove 10 is located at a first end of the piston column 9, and the first end of the piston column 9 penetrates through the through hole 4 on the limit cover plate 3 and is in clearance fit with the through hole 4. An annular baffle 11 is fixedly arranged on the outer wall of the first end part of the piston column 9, the annular baffle 11 is positioned in the channel 2, the outer wall of the annular baffle is in clearance fit with the inner wall of the channel 2, and when the piston column 9 moves towards the limit cover plate 3, the annular baffle 11 can be in contact with the limit cover plate 3, so that the movement of the piston column 9 is limited.
In addition, a second vent hole 12 is formed between the annular baffle 11 and the strip-shaped groove 10 on the piston column 9, and external air can enter the channel 2 through the second vent hole 12.
The second end of the bar-shaped groove 10 is located on the side wall of the piston rod 9, whereby a seal 13 is formed between the second end of the bar-shaped groove 10 and the second end of the piston rod 9, the seal 13 passing through the sealing ring 8 and being in interference fit with the sealing ring 8. When the piston column 9 is moved towards the ventilation cover plate 5 until the sealing part 13 completely passes through the sealing ring 8, a third air vent 14 is formed between the sealing ring 8 and the strip-shaped groove 10 on the piston column 9, and the third air vent 14 is communicated with the cavities on the left side and the right side of the sealing ring 8.
Further, the longitudinal direction of the bar-shaped groove 10 is arranged along the longitudinal direction of the piston rod 9.
Further, the strip-shaped grooves 10 are provided in a plurality of strips and are equally spaced along the circumferential direction of the piston rod 9.
The piston column 9 is sleeved with a spring 15, the spring 15 is in a compressed state, one end of the spring 15 is in contact with an annular boss 16 arranged on the inner wall of the channel 2, the other end of the spring 15 is in contact with the annular baffle 11, and the annular baffle 11 is in close contact with the limit cover plate 3 under the action of the spring 15.
The device is integrally arranged in a foaming layer of a refrigerator body, specifically, the ventilation cover plate 5 is fixedly connected with an inner lining plate of the refrigerator, the inside of the refrigerator is communicated with the channel 2 through the first ventilation hole 6, meanwhile, the limit cover plate 3 is fixedly connected with a shell of the refrigerator, and the channel 2 is communicated with the outside of the refrigerator through the second ventilation hole 12.
In the initial state, the spring 15 is in a compressed state, the annular baffle 11 is tightly contacted with the limit cover plate 3 under the action of the elastic force of the spring 15, and meanwhile, the sealing part 13 is positioned in the sealing ring 8, and the channel 2 is in a closed state.
When it is desired to open the cabinet door, as shown in fig. 6, the first end of the piston rod 9 is pressed by hand, the spring 15 is further compressed, the annular shutter 11 is separated from the stopper cover plate 3, and at the same time, the sealing portion 13 completely penetrates the sealing ring 8, and the passage 2 is in an open state. At this time, outside air enters the channel 2 through the second vent hole 12 under the action of negative pressure, then enters into the freezer through the third vent hole 14 and the first vent hole 6 in sequence, realizes the inside and outside pressure balance of freezer, and convenience of customers easily opens the refrigerator door.
When the hand is released, the state returns to the initial state by the elastic force of the spring 15. Of course, it is ensured that the maximum friction between the sealing portion 13 and the sealing ring 8 is smaller than the minimum elastic force during deformation of the spring 15.
In summary, according to the refrigerator door opening pressure balancing device provided by the embodiment of the invention, when the refrigerator is opened, the first end opening channel of the piston column is pressed to realize the balance of the internal pressure and the external pressure of the refrigerator, so that a user can conveniently open the refrigerator door, manual operation is not needed after the refrigerator door is loosened, the channel is automatically closed, the sealing is ensured, the phenomenon of cold leakage is avoided, and the refrigerating effect is ensured. In addition, the device has the advantages of simple structure, convenient operation for users, no occupation of space and no influence on the external appearance of the refrigerator.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The refrigerator door opening pressure balancing device is characterized by comprising a connecting piece, wherein a channel is arranged in the connecting piece, a limiting cover plate is arranged at one end of the channel, a through hole is formed in the limiting cover plate, a ventilation cover plate is arranged at the other end of the channel, and a plurality of first ventilation holes are formed in the ventilation cover plate;
the inner wall of the channel is provided with an annular groove, a sealing ring is arranged in the annular groove, and the channel is divided into a left cavity and a right cavity;
the piston is characterized in that a piston column capable of moving axially is arranged in a cavity close to the limit cover plate, a strip-shaped groove is formed in the side wall of the piston column, the first end of the strip-shaped groove is located at the first end of the piston column, the first end of the piston column penetrates through the through hole, an annular baffle is fixedly arranged on the outer wall of the first end of the piston column and located in the channel, a second ventilation hole is formed between the annular baffle and the strip-shaped groove, the second end of the strip-shaped groove is located on the side wall of the piston column, a sealing part is formed between the second end of the strip-shaped groove and the second end of the piston column, the sealing part penetrates through the sealing ring and is in interference fit with the sealing ring, and a third ventilation hole is formed between the sealing ring and the strip-shaped groove when the piston column is moved until the sealing part completely penetrates through the sealing ring;
the piston column is sleeved with a spring, the spring is in a compressed state, one end of the spring is in contact with an annular boss arranged on the inner wall of the channel, the other end of the spring is in contact with the annular baffle, and the annular baffle is in close contact with the limiting cover plate under the action of the spring.
2. The door opening pressure balancing device of a refrigerator according to claim 1, wherein a maximum friction force between the sealing portion and the sealing ring is smaller than a minimum elastic force during deformation of the spring.
3. The door opening pressure balancing device of a refrigerator according to claim 1, wherein the length direction of the strip-shaped groove is arranged along the length direction of the piston column.
4. A refrigerator door opening pressure balancing device according to claim 3, wherein the strip-shaped grooves are provided with a plurality of strips and are arranged at equal intervals along the circumferential direction of the piston column.
5. The door opening pressure balancing device of a refrigerator according to claim 1, wherein the outer wall of the annular baffle is in clearance fit with the inner wall of the channel.
6. The door opening pressure balancing device of a refrigerator according to claim 1, wherein the sealing ring is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310912365.0A CN116951873A (en) | 2023-07-25 | 2023-07-25 | Refrigerator door opening pressure balancing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310912365.0A CN116951873A (en) | 2023-07-25 | 2023-07-25 | Refrigerator door opening pressure balancing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116951873A true CN116951873A (en) | 2023-10-27 |
Family
ID=88444088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310912365.0A Pending CN116951873A (en) | 2023-07-25 | 2023-07-25 | Refrigerator door opening pressure balancing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116951873A (en) |
-
2023
- 2023-07-25 CN CN202310912365.0A patent/CN116951873A/en active Pending
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