JP3229671B2 - freezer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freezer for freezing and storing foods or the like by cooling the inside of the refrigerator to a freezing temperature.

[0002]

2. Description of the Related Art Conventionally, a freezer of this type is installed in a kitchen of a restaurant, a store of a supermarket, or the like. In addition to cooling to a freezing temperature of not more than ℃, the opening in the refrigerator is opened and closed by a heat insulating door or a heat insulating glass door.

When the door of such a freezer is opened and then closed, the outside air having a relatively high temperature flowing into the inside of the freezer during the opening of the freezer contracts rapidly, so that the air pressure in the freezer temporarily drops remarkably. Then, the pressure gradually increases due to the inflow of outside air from the surroundings of the door or the gap around the main body,
Several tens of seconds after the door is closed, the internal pressure of the chamber becomes substantially equilibrium with the external pressure. Therefore, opening the door immediately after closing it requires a great deal of force to overcome the pressure difference between the inside and outside of the refrigerator, making it extremely difficult to open the door, and a great amount of acting force on the door handle etc. There was also the danger of the door being damaged.

Therefore, conventionally, the main body or the door is mounted as shown in FIG.
Also, an external air introduction damper device 100 as shown in FIG. 6 is provided to balance the pressure between the inside and the outside of the main body. That is, FIG. 5 is a front view of the conventional outside air introduction damper device 100, and FIG.
2 is a sectional view taken along line AA of FIG. The outside air introduction damper device 100 includes a base plate 103 attached to a hole 102 formed in a freezer main body 101, and a damper plate 106 supported by a support pin 105 positioned at the center of a communication hole 104 formed in the base plate 103. And a coil spring 107 for urging the damper plate 106 to keep the communication hole 104 closed by keeping the damper plate 106 in close contact with the base plate 103 at all times.

When the pressure inside the chamber 108 and the pressure outside the main body 101 are balanced, the damper plate 106 is pressed against the base plate 103 by the urging force of the coil spring 107 to close the communication hole 104. As shown in FIG. 6, when the pressure in the interior 108 decreases after the door is closed, the acting force due to the pressure difference overcomes the urging force of the coil spring 107 to move the damper plate 106 to the interior 108 side as shown in FIG. By opening the hole 104, outside air is introduced into the interior 108 as shown by an arrow in FIG.

[0006]

However, in such a configuration, in order to improve the sealing property between the base plate 103 and the damper plate 106 when the pressure inside the chamber 108 and the outside of the main body 101 are balanced, the coil spring 107 is attached. We need to secure some power. Therefore, in order to operate the damper plate 106 stably, the area of the damper plate 106 has to be increased to some extent so that the external pressure enough to overcome the urging force of the coil spring 107 must be applied. In addition, there is a problem in that the heat insulation performance of the main body 101 of the outside air introduction damper device 100 is reduced.

Another method is disclosed in, for example, Japanese Patent Application Laid-Open
No. 86984 (F25D23 / 00), a communication hole and an opening / closing member that always closes the communication hole are attached to the main body. When the door is opened, the communication member is pressed by pressing the opening / closing member with a finger. It is also conceivable to open the chamber and balance the pressure inside and outside the refrigerator, but the time and effort of pressing with a finger is required,
There was a problem that the operation became complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem, and has made it easy to open a door without deteriorating operability and suppressing a decrease in heat insulation performance of a main body. The purpose is to provide a freezer.

[0009]

That is, the freezer 1 according to the first aspect of the present invention comprises a main body 8 comprising a heat insulating box 2 and a main body 8 comprising the heat insulating box 2.
A door 6 for opening and closing the opening 4 of the interior 3 formed therein; a flexible gasket 7 attached to the inner surface of the door 6 and in close contact with the periphery of the opening 4; , A communication portion 24 that communicates between the inside 3 and the outside of the main body 8, an opening / closing member 38 that opens and closes the communication portion 24, and a contact portion 46 that is configured on the door 6 and contacts the opening / closing member 38. The opening / closing member 38 always closes the communication portion 24, and when the door 6 approaches the main body 8 due to the contraction of the gasket 7, the opening / closing member 38 is pressed by the contact portion 46 to operate, and the communication portion 2 is operated.
4 is opened.

Further, the freezer 1 according to the second aspect of the present invention is arranged such that the inside of the communication part 24 and the outside ventilation part 29 of the main body,
Sealing surfaces 37, 36 are formed around the periphery 26, and the opening / closing member 38 is in close contact with the sealing surfaces 36, 37 so as to be detachable from each other, and opens and closes the ventilation portions 26, 29, respectively.
1 and 39, wherein both seal portions 41 and 39 always close both vent portions 26 and 29, and are configured to simultaneously open both vent portions 26 and 29 by the operation of the opening / closing member 38. I do.

[0011]

According to the freezer 1 of the first aspect of the present invention, the opening / closing member 38 always closes the communication portion 24. And door 6
Is closed after the door 6 is opened, and when the outside air flowing in while the door 6 is opened contracts and the pressure in the interior 3 decreases, the door 6 is pushed to the main body 8 side by the atmospheric pressure, and thereby the flexible gasket 7 is opened.
Contracts, and the door 6 approaches the main body 8. By the proximity of the door 6, the opening / closing member 38 is pressed by the contact portion 46 and operates.
In order to open the communication part 24, the outside air enters the inside 3 through the communication part 24, whereby the pressure difference between the inside 3 and the outside of the main body 8 is quickly eliminated.

At this time, even if the urging force for closing the communication portion 24 by the opening / closing member 38 is large to some extent, the entire door 6 receives the pressure difference between the inside 3 of the compartment and the outside of the main body 8 and the contact portion 46 causes the opening / closing member 38 to contact. , The pressing force of the contact portion 46 is sufficiently ensured, so that the opening / closing operation of the communication portion 24 by the opening / closing member 38 is also stabilized. According to the freezer 1 of the second aspect of the present invention, the seal surfaces 37 and 36 are formed around the inside of the communication portion 24 and around the outside ventilation portions 29 and 26 of the main body, and both the seal portions 39 and 41 of the opening / closing member 38 are provided. Seal surfaces 37, 36
The two ventilation portions 29, 26 are closed by being close to each other, and the two ventilation portions 29, 26 are simultaneously opened by the operation of the opening / closing member 38. Therefore, the opening / closing member 38 closes the ventilation portions 29, 26. The sealing performance when the communication part 24 is improved is improved, and the communication part 24 is closed at two places inside the storage and outside the main body, so that the heat insulation performance of the communication part 24 is also improved.

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional side view of a partition member 5 of the freezer 1 of the present invention, FIG. 2 is a vertical sectional side view of the freezer 1, and FIG. In the freezer 1 of the present invention, a main body 8 is constituted by a heat-insulating box 2 that opens forward, and a heat-insulating partition member 5 that vertically divides a front opening 4 of an inside 3 of the refrigerator formed in the heat-insulating box 2. The partitioned opening 4 is closed by two heat-insulating doors 6 so that it can be opened and closed. The heat-insulating doors 6, 6 are pivotally supported on the right side by a hinge 10 to a main body 8, and flexible gaskets 7, 7 formed by extruding soft vinyl chloride around their inner surfaces.
Are attached.

A rectangular through-hole 9 is formed at the rear of the top wall 2A of the heat-insulating box 2, and this through-hole 9 is closed by a heat insulating plate 11 from above. On the upper surface of the heat insulating plate 11, a compressor 12, a condenser 13 and a condenser fan 14 constituting a cooling device are mounted, and on the lower surface of the heat insulating plate 11, a cooling system constituting a well-known refrigeration cycle together with the compressor 12 and the like. The vessel 15 is attached. And the cooler 15
The heat insulating plate 11 is placed from above on the periphery of the through hole 9 in a state where is attached, whereby the through hole 9 is closed and the cooler 15 is arranged above the inside of the refrigerator 3.

As described above, a drain pan 16 is disposed below the cooler 15 disposed in the refrigerator 3 to form a cooling chamber 17 for accommodating the cooler 15 in the upper part of the refrigerator 3. A blower 18 is provided in front. The blower 18 operates to forcibly circulate the cool air cooled by the cooler 15 to the inside of the refrigerator 3 to cool the inside of the refrigerator 3 to a freezing temperature of −15 ° C. or lower. On the other hand, a drain pipe 19 extending rearward from the rear end of the drain pan 16 penetrates the heat-insulating box 2, projects to the rear surface of the heat-insulating box 2, and is connected to a drain hose 20. It extends downward and is connected to the trap unit 21. Then, the drain water dropped from the cooler 15 when the cooler 15 is defrosted or the like is received by the drain pan 16, flows into the drain hose 20 through the drain pipe 19, flows down the drain hose 20, and flows down the drain hose 20 to the trap portion 21. And overflow from there. The drain pipe 19 on the upstream side of the trap 21 is provided with the bottom wall 2 of the heat insulating box 2.
The drain hole 22 formed in B is also communicated, so that miscellaneous drainage from the inside 3 is also discharged to the drain pipe 19. Drain water is constantly stored and sealed in the trap portion 21, thereby preventing the bad odor generated from the external drain groove from entering the inside of the storage 3 from the drain hose 20.

A front plate 23 made of a steel plate is provided on the front surface of the partition member 5, and a communication portion 24 is formed on the left side of the partition member 5 on the non-pivot side of the door 6. I have. The communication portion 24 is attached to the front plate 23 so as to be deviated upward from the center thereof, and is provided with a central insertion hole 3 formed of a through hole.
And a cap 27 having a main body outer ventilation portion 26 formed therearound, and a cap 27 which penetrates through the inside of the partition member 5 rearward from the cap 27 and is formed by a storage inside ventilation portion 29 of a rear face plate 28 of the partition member 5. And an inner hollow pipe 31 opened to the inside 3. At a substantially central portion of the pipe 31, a central insertion hole 32 formed of a through hole and an introduction hole 3 formed therearound.
3 is formed to protrude inward. Also, the main body outer ventilation portion 26 on the inner surface of the cap 27 is provided.
An outer sealing surface 36 is formed in the periphery, and the pipe 31
An inner sealing surface 37 is formed around the inner ventilation part 29 at the rear end.

A rod-like opening / closing member 38 is provided in the communication portion 24.
Are mounted so as to be movable in the front-rear direction. That is, the opening / closing member 38 is connected to the center insertion hole 30 of the cap 27 and the support portion 34.
The front end protrudes forward of the cap 27, and the rear end of the inner side seal portion 39, which is a plate body located outside the pipe 31 and protruding outward, is inserted through the central insertion hole 32. Is attached. A main body outer seal portion 41 that protrudes outward is formed on a portion of the opening / closing member 38 located on the rear side of the cap 27, and a coil spring 42 is compressed between the main body outer seal portion 41 and the support portion 34. It is inserted in the state.

On the other hand, the inside of the gasket 7 attached to each door 6 is composed of a plurality of layers, and the inside of the main body 8 side is provided with a magnet 44. When the door 6 closes the opening 4, The magnet 44 of the gasket 7 is attracted to the front surface of the heat insulating box 2 around the opening 4 and to the front plate 23 of the partition member 5 to hermetically seal between the door 6 and the main body 8. The upper door 6
An abutting portion 46 protruding toward the main body 8 below the gasket 7 is attached to the lower surface, and the surface on the main body 8 side is a flat surface, and has a positional relationship of abutting on the front end of the opening / closing member 38. ing.

Next, the operation of the opening / closing member 38 will be described with reference to FIG. 1 and FIG. Now, door 6,
6 closes the openings 4, 4.
When the outside atmospheric pressure is substantially equilibrated, the gasket 7
As described above, the magnet 44 is attracted to the front surface of the heat insulating box 2 around the opening 4 and the front plate 23 of the partition member 5, and the gasket 7 has a regular shape as it is formed. In this state, the contact portion 46 is in contact with or close to the front end of the opening / closing member 38 as shown in FIG. 1, and the main body outer sealing portion 41 of the opening / closing member 38 is in close contact with the main body outer sealing surface 36 of the cap 27 from behind. And the main body outer ventilation portion 26 and the central insertion hole 3
0 and the inside seal part 3 of the opening / closing member 38
Numeral 9 closely closes to the inside seal surface 37 of the pipe 31 from behind and closes the inside ventilation section 29.

Further, the coil spring 42 presses the outer seal portion 41 of the main body of the opening / closing member 38 toward the front, and presses the respective seal portions 41 and 39 against the respective seal surfaces 36 and 37, whereby the communication portion 24 is formed inside the warehouse. And it is stably closed outside the main body. Therefore, since air does not flow between the inside of the pipe 31 and the outside of the main body 8 and between the inside of the refrigerator 3, the space inside the pipe 31 becomes a heat insulating space, and the deterioration of the heat insulating performance of the heat insulating box 2 at the communication portion 24 is reduced. The occurrence of dew condensation and frost on the communication portion 24 is suppressed.

Next, once the door 6 is opened and closed again,
The air pressure in the compartment 3 once rises due to the closing pressure of the door 6, and then rapidly decreases due to the contraction of the outside air that has flowed during opening. When the pressure in the refrigerator 3 is reduced to a pressure lower than the atmospheric pressure, the atmospheric pressure pushes the door 6 toward the main body 8 as shown by an arrow in FIG. 3, whereby the gasket 7 contracts. Since the air in the gasket 7 escapes into the interior 3 as indicated by a broken arrow in FIG. 4, the gasket 7 is crushed from its regular shape, whereby the door 6 approaches the main body 8. Since the contact portion 46 presses the opening / closing member 38 in the three directions inside the refrigerator by the proximity of the door 6, the opening / closing member 38 moves in the three directions inside the refrigerator. The central insertion hole 30 and the two ventilation portions 26 and 29 are simultaneously opened apart from the two sealing surfaces 36 and 37 of the pipe 27. Opening of the central insertion hole 30 and the ventilation sections 26 and 29 allows the outside air to flow through the outside ventilation section 26 as shown by solid arrows in FIG.
And flows into the pipe 31 through the central insertion hole 30,
After passing through the introduction hole 33, it flows into the storage from the storage inside ventilation portion 29. As a result, the pressure difference between the interior 3 and the outside of the main body 8 is quickly eliminated, and when the equilibrium state is reached, the door 6 separates from the main body 8 and returns to the state shown in FIG. The state shown in FIG. 1 is returned by the urging force of (1), and the central insertion hole 30 and the ventilation portions 26 and 29 are closed.

At this time, since the entire door 6 receives a pressure difference between the inside of the refrigerator 3 and the atmospheric pressure outside the main body 8, the pressing force of the opening / closing member 38 by the contact portion 46 can be sufficiently ensured and the contact portion 4 can be secured.
Since the door 6 is on the non-pivot side of the door 6, its displacement is the largest. Therefore, even if the urging force of the coil spring 42 is increased to some extent to improve the sealing performance at the time of closing, the opening and closing members 38 The opening and closing operations of the ventilation portions 26 and 29 (including the center insertion hole 30) are stable.

In the embodiment, the door 6 which cannot be seen through the inside of the refrigerator 3 is employed. However, the present invention is not limited to this. The invention is valid.

[0024]

As described above in detail, according to the first aspect of the present invention, the opening / closing member always closes the communication portion, the pressure in the storage decreases, the flexible gasket contracts, and the door opens. When the is close to the main body, the opening / closing member operates by being pressed by the contact portion and opens the communication portion, so that the pressure difference between the inside of the refrigerator and the outside of the main body is quickly eliminated by the invasion of the outside air from the communication portion. . Therefore, after the door is closed, the door can be easily reopened within a short time, and the usability is improved. Also, at this time, the user does not need to perform any operation other than opening and closing the door, so that the operability is not deteriorated. The entire door receives the pressure difference between the opening and closing member and presses the opening and closing member by the contact portion, so that the pressing force of the contact portion is sufficiently secured, and therefore, the communication portion by the opening and closing member does not deteriorate the heat insulation performance of the main body. Can be stabilized.

According to the second aspect of the present invention, a sealing surface is formed around the inside of the communication part and the outside of the main body, and the sealing part of the opening / closing member is brought into close contact with both of the sealing surfaces to form the two ventilation parts. Both the ventilation portions are simultaneously opened by the operation of the opening / closing member, so that the sealing performance when the opening / closing member closes the ventilation portion is improved, and the communication portion is formed between the inside of the refrigerator and the outside of the main body. Since it is closed at a location, the heat insulation performance of the communication part is also improved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a partition member of a freezer of the present invention.

FIG. 2 is a vertical sectional side view of the freezer of the present invention.

FIG. 3 is a plan sectional view of the freezer of the present invention.

FIG. 4 is a vertical sectional side view of a partition member portion of the freezer when the internal pressure is reduced.

FIG. 5 is a front view of a conventional outside air introduction damper device.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Freezer 2 Insulated box 3 Interior 5 Partitioning member 6 Door 7 Gasket 8 Main body 24 Communication part 26 External ventilation part 29 Internal ventilation part 36 External sealing surface 37 Internal sealing surface 38 Opening / closing member 39 Internal sealing part 41 Body outer seal part 42 Coil spring 46 Contact part

Claims (2)

(57) [Claims] 1. A main body comprising a heat insulating box, a door for opening and closing an opening in a refrigerator formed in the main body, and a flexible member attached to an inner surface of the door and closely in contact with a periphery of the opening. A conductive gasket, a communication part formed in the main body, and communicating between the inside of the refrigerator and the outside of the main body, an opening and closing member for opening and closing the communication part, and a contact part formed on the door and contacting the opening and closing member. The opening / closing member always closes the communication portion, and when the door approaches the main body due to contraction of the gasket, the opening / closing member is pressed by the contact portion to operate, and the communication portion is closed. A freezer characterized by being open. 2. A sealing surface is formed around the inside of the communicating part and around the ventilation part outside the main body, and the opening / closing member is provided with a sealing part which comes into close contact with the sealing surfaces so as to be able to open and close the ventilation parts. 2. The freezer according to claim 1, wherein the two seal portions are configured to always close the two ventilation portions and to simultaneously open the two ventilation portions by the operation of the opening / closing member.