JP3831515B2 - Cooling storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling storage chamber requiring no relief valve. SOLUTION: The cooling storage chamber comprises an inspection opening 11 made in the top wall of the body thereof, a heat insulating cover body 17 closing the inspection opening from the upper side, a heat insulating cover 16 having a part 18 bulging downward from the cover body to be fitted in the inspection opening, and a packing 22 for the cover body provided at the circumferential part on the lower surface of the cover body 17 or the upper surface at the top wall of the storage chamber body. The circumferential part of the cover body 17 is mounted the storage chamber body through the packing 22 and the heat insulating cover 16 is removable and upward movement thereof is not restricted.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooling storehouse in which an inspection opening is formed in a top wall.
[0002]
[Prior art]
A conventional cooling storage will be described with reference to FIGS. FIG. 5 is a perspective view of a conventional cooling storage. FIG. 6 is a cross-sectional view of the vicinity of the inspection opening. An insulated prefabricated refrigerator, which is a cooling storage, has an inspection opening 02 formed on the ceiling wall 01 for maintenance of piping and wiring on the ceiling wall, and the insulation opening door 03 can be opened and closed freely. Blocked. One end of the heat insulating small door 03 is rotatably attached to the refrigerator main body 04 by a hinge 06, and a latch 07 is provided at the other end. With this latch 07, the insulated door 03 can be reliably maintained in the closed state.
[0003]
[Problems to be solved by the invention]
By the way, in the cooling storage, the internal temperature temporarily rises when the internal cooler is defrosted or when the front door 08 is opened and closed, and the internal pressure may increase accordingly. When the internal pressure exceeds a predetermined value (hereinafter referred to as “panel breakdown pressure”), the heat insulating panel 09 constituting the refrigerator main body 04 is destroyed. Therefore, in order to prevent the heat insulation panel 09 from being destroyed, a relief valve (not shown) is provided. When the internal pressure becomes higher than the set pressure, the relief valve is operated to release the internal air to the outside. The internal pressure is lower than the panel breaking pressure.
[0004]
As described above, a relief valve is conventionally provided, and the cost and installation work of the relief valve are required. In addition, after the relief valve is installed, the set pressure of the relief valve cannot be adjusted. Furthermore, since the relief valve has a relatively small amount of air released per unit time, it may be necessary to install a large number of relief valves according to the internal volume of the cooling storage and the refrigeration capacity.
[0005]
Moreover, since the heat insulation small door 03 rotates with respect to the refrigerator main body 04, the comparatively high space which permits rotation of the heat insulation small door 03 above the ceiling wall 01 of the refrigerator main body 04 is needed. In addition, since the heat insulating small door 03 is attached to the refrigerator main body 04 by the hinge 06, the heat insulating small door 03 cannot be easily removed, and it is difficult to replace the packing 012 of the heat insulating small door 03.
[0006]
The present invention is intended to solve the above-described problems, and an object thereof is to provide a cooling storehouse that does not require a relief valve.
[0007]
[Means for Solving the Problems]
The cooling storage of the present invention includes an inspection opening (11) formed in the top wall of the cooling storage body (1), a heat insulating lid body (17) closing the inspection opening from above, and the heat insulation. A heat-insulating lid (16) that includes a bulging portion (18) that bulges downward from the lid body and fits into the inspection opening, and prevents cold air in the storage from leaking out of the inspection opening ; A heat insulating lid main body packing (22) provided on the lower peripheral edge of the lid main body or the top wall upper surface of the cooling storage body, and a fin attached to at least one of the end surface of the inspection opening or the side surface of the bulging portion. And a bulging portion packing (23) . An adjustment weight (32) is detachably provided on the upper surface of the heat insulating lid. In this heat insulating lid, the peripheral edge of the heat insulating lid main body is placed on the cooling storage body main body via the packing for the heat insulating lid main body, is removable and is not restrained from moving upward all around, and the expansion of the heat insulating cover main body is not limited. Misalignment is prevented at the exit.
[0008]
When the internal pressure rises, the heat insulating lid that closes the inspection opening rises, and when the pressure drops after rising, the heat insulating cover closes the inspection opening .
[0009]
Moreover, the adjustment weight may be provided in the four corners of the upper surface of a heat insulation lid so that attachment or detachment is possible .
[0010]
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the cooling storage according to the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a cooling storage. FIG. 2 is a cross-sectional view of the vicinity of the inspection opening. 3A and 3B are explanatory views of the heat insulation lid and the packing. FIG. 3A is a view of the heat insulation lid in a floating state, FIG. 3B is an enlarged sectional view of the heat insulation lid main body packing, and FIG. It is sectional drawing. 4A and 4B are explanatory views of the heat insulating lid in a state where the adjustment weight is attached, in which FIG. 4A is a front view and FIG. 4B is a plan view.
[0012]
A storage body 1 of a heat-insulated prefabricated refrigerator that is a cooling storage is configured by connecting a plurality of heat-insulating panels 2. The heat-insulating panel 2 includes a side plate panel 3 that constitutes a side wall of the prefabricated cooling storage and a top wall. There are a ceiling panel 4 and a floor panel 6 constituting the floor panel. A front heat insulating door 7 is attached to the front surface of the prefabricated cooling storage so as to be freely opened and closed.
[0013]
In addition, an inspection opening 11 is formed through the ceiling panel 4, and the inspection opening 11 is closed by a heat insulating lid 16 so as to be freely opened and closed. The heat insulating lid 16 includes a substantially rectangular heat insulating lid main body 17 and a bulging portion 18 that bulges downward from the heat insulating lid main body 17. A heat insulating lid main body packing 22 in which a cavity 21 is formed is attached. The bulging portion 18 is fitted into the inspection opening 11, and the peripheral portion of the heat insulating lid main body 17 is placed on the ceiling panel 4 via the packing 22 for heat insulating lid main body. Therefore, the heat insulating lid 16 is detachable and is not restrained from moving upward over the entire circumference. Further, on the end face of the inspection opening 11, that is, the face facing the bulging portion 18, four flexible fin-shaped bulging portion packings 23 are attached in the vertical direction. When the heat insulating lid 16 is closed, the tip of the bulging portion packing 23 is in contact with the side surface of the bulging portion 18. Further, the inside of the storage body 1, that is, the inside of the storage room is cooled by a cooler (not shown). It is the heat insulating lid main body packing 22 and the bulging portion packing 23 that the cool air in the chamber leaks from the inspection opening 11 to the outside of the chamber, and that heat outside the chamber enters the chamber from the inspection opening 11. It is prevented.
[0014]
When maintenance is performed on the piping and wiring on the ceiling panel 4, the heat insulating lid 16 is lifted and slid to open the inspection opening 11, and an operator comes out from the inspection opening 11 onto the ceiling panel 4. To check.
[0015]
By the way, in the heat insulation prefabricated refrigerator, the temperature inside the chamber temporarily rises at the time of defrosting the cooler or opening and closing the front heat insulation door 7, and the pressure inside the chamber may rise accordingly. When this internal pressure rises above a certain value (hereinafter referred to as “heat insulation lid floating pressure”), as shown in FIG. 3A, the heat insulation lid 16 has any part of the entire circumference. Surface. Due to the floating of the heat insulating lid 16, the cool air in the warehouse flows out of the warehouse through the inspection opening 11, and the internal pressure is lower than the heat insulating lid floating pressure. Then, the heat insulation lid 16 descends and returns to the closed state shown in FIG. 2, and closes the inspection opening 11 again. Since the outflow of air due to the floating of the heat insulating lid 16 is relatively larger than the outflow of air by the relief valve, it is not necessary to provide a large number like the relief valve.
[0016]
By the way, it is preferable to change the heat insulation lid floating pressure according to the capacity of the cooling storage or the set temperature. For example, when the capacity of the cooling storage is small or when the set temperature is low, the heat insulation lid floating pressure may be set high. Therefore, as shown in FIG. 4, screw rods 31 as mounting members are erected at the four corners of the upper surface of the heat insulating lid 16, and plate-like adjustment weights 32 are fitted into the screw rods 31 and fixed with nuts 33. is doing. When the heat insulation lid floating pressure is increased, the adjustment weight 32 is increased. On the other hand, when the heat insulation lid floating pressure is lowered, the adjustment weight 32 is decreased. In this manner, the adjustment weight 32 is attached and detached to adjust the heat insulation lid floating pressure.
[0017]
As described above, in the embodiment, the heat insulating lid 16 can be lifted and removed from the inspection opening 11 of the storage body 1 to perform maintenance of wiring and piping on the top wall, that is, the ceiling panel 4. At that time, since the heat insulating lid 16 can be slid sideways after being lifted, there is no problem in opening and closing the inspection opening 11 even if the space on the top wall is relatively low.
[0018]
Moreover, since the heat insulation lid | cover 16 is not attached to the storage main body 1 with a hinge, a latch, etc., but is removable, the replacement | exchange of the heat insulation lid main body packing 22 can be performed easily. And while being able to reduce component cost, the installation operation | work of the heat insulation lid | cover 16 also becomes easy.
[0019]
And when the pressure in a warehouse rises more than the heat insulation lid floating pressure, the heat insulation lid 16 floats and the air in a warehouse flows out of the warehouse. Since this heat insulation lid levitation pressure is set lower than the panel breaking pressure which is the storage body breaking pressure, it is possible to prevent the inside pressure from becoming higher than the panel breaking pressure. Therefore, the relief valve provided conventionally becomes unnecessary.
[0020]
In addition, since the adjustment weight 32 is detachably provided on the heat insulating lid 16, the flying pressure of the heat insulating lid can be adjusted. Therefore, according to the capacity | capacitance and cooling capacity of a cooling storage store | warehouse | chamber, the heat insulation lid floating pressure which is the pressure in a store | warehouse | chamber when the heat insulation lid | cover 16 floats can be set to an optimal value. In particular, since the adjustment weights 32 can be installed at the four corners of the heat insulating lid 16, the adjustment weight 32 is adjusted so that a force is applied to the heat insulating lid main body packing 22 substantially uniformly. be able to.
[0021]
In addition, since the heat insulating lid 16 is provided with a bulging portion 18 that fits into the inspection opening 11, the position of the heat insulating lid 16 is not greatly displaced when the heat insulating lid 16 floats, When lowered, the heat insulating lid 16 can reliably close the inspection opening 11.
[0022]
Furthermore, both the insulating lid main body packing 22 and the bulging portion packing 23 are provided, and it is possible to more reliably prevent the cool air from leaking in the refrigerator as compared with the case where there is only one packing. . Further, since the heat insulating lid main body packing 22 is a packing in which the cavity 21 is formed, it has pressure resistance compared to the fin-shaped packing and can withstand the weight of the heat insulating lid 16. On the other hand, the bulging portion packing 23 has a fin shape, and therefore, when the heat insulating lid 16 returns to the closed position, the lowering of the heat insulating lid 16 is prevented as compared with a packing in which a cavity is formed. There are few things. Therefore, after the internal pressure is lowered, the heat insulating lid 16 is lowered without being obstructed by the bulging portion packing 23, and the inspection opening 11 can be reliably closed.
[0023]
Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Can be done. Examples of modifications of the present invention are illustrated below.
(1) The insulating lid main body packing 22 does not necessarily have the cavity 21 formed therein.
[0024]
(2) In the embodiment, the cooling storage is an insulated prefabricated refrigerator, but other types of cooling storage are also possible. For example, an insulated prefabricated freezer can be used.
[0025]
( 3 ) In the embodiment, the bulging portion packing 23 is provided on the end face of the inspection opening 11, but can also be provided on the side surface of the bulging portion 18. It is also possible to provide both the end face of the inspection opening 11 and the side face of the bulging portion 18. Also, the number of fins can be changed as appropriate.
( 4 ) In the embodiment, one inspection opening 11 is provided on the top wall of the storage body 1, but a plurality of inspection openings 11 may be provided on the top wall of the storage body 1.
[0026]
( 5 ) In the embodiment, the heat insulating lid main body packing 22 is provided on the peripheral edge portion of the heat insulating lid main body 17, but on the surface facing the peripheral edge portion of the heat insulating lid main body 17 on the top wall of the storage body 1. It is also possible to provide it. However, in the case where it is provided at the peripheral portion of the heat insulating lid main body 17, the heat insulating lid 16 can be removed, and the packing 22 for the heat insulating lid main body can be replaced at a place other than on the top wall of the storage body 1. The replacement work of the heat insulating lid main body packing 22 is facilitated.
( 6 ) In the embodiment, the adjustment weight 32 has a plate shape, but its shape, material, arrangement, etc. can be appropriately selected.
[0027]
【The invention's effect】
According to the present invention, the inspection opening on the top wall of the cooling storage body is closed by the heat insulating lid through the packing for the heat insulating lid main body, and prevents heat from entering from the outside as much as possible. This heat insulating lid is detachable and the upward movement is not restricted over the entire circumference, so when the internal pressure rises, any part of the entire circumference of the thermal insulating lid rises and the air inside the air Spill to Accordingly, it is possible to prevent the internal pressure from reaching the storage body main body breaking pressure. As a result, the conventionally provided relief valve becomes unnecessary. Moreover, since the bulging part of the heat insulation cover is fitted in the inspection opening, it is possible to prevent the heat insulation cover from being removed from the inspection opening when the heat insulation cover is lifted. As a result, the heat insulating lid can again close the inspection opening when lowered. Moreover, since the inspection opening can be opened by slightly lifting and sliding the heat insulating lid, the heat insulating lid can be opened and closed even when the space above the cooling storage body is low. As a result, the installation location of the cooling storage can be determined without much restriction on the space above the cooling storage body. Further, since the heat insulating lid is removable, the replacement operation of the packing for the heat insulating lid main body is facilitated.
[0028]
Also, at least on one side of the end face or bulging portion of the inspection opening, since fin-like bulging portion packing is mounted, a packing is provided in two stages, the heat intrusion from the outside compartment Can be prevented more efficiently. Thus, although the two-stage packing is provided, the bulging portion packing has a fin shape, and therefore the bulging portion packing hardly prevents the heat insulating lid from being lowered. Therefore, the heat insulating lid can be lowered again after ascending to reliably close the inspection opening.
[0029]
Furthermore, since the detachable adjustment weight is provided in the heat insulating cover, by attaching and detaching the adjusting weights, it is possible to adjust the heat insulating lid floating pressure. As a result, the heat insulation lid floating pressure can be set to an optimum value according to the capacity of the cooling storage and the refrigerating capacity.
[0030]
Since the adjustment weights are detachably provided at the four corners of the upper surface of the heat insulating lid, the adjustment weight can be changed so that the force is applied to the packing for the heat insulating lid main body substantially uniformly. it can.
[Brief description of the drawings]
FIG. 1 is a perspective view of a cooling storage.
FIG. 2 is a cross-sectional view of the vicinity of an inspection opening.
FIG. 3 is an explanatory view of a heat insulation lid and packing, (a) is a view of the heat insulation lid in a floating state, (b) is an enlarged sectional view of the heat insulation lid main body packing, and (c) is a bulging portion. FIG.
FIGS. 4A and 4B are explanatory views of a heat insulating lid in a state where an adjustment weight is attached, in which FIG. 4A is a front view and FIG. 4B is a plan view.
FIG. 5 is a perspective view of a conventional cooling storage.
FIG. 6 is a cross-sectional view of the vicinity of the inspection opening.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Storage body 11 Inspection opening 16 Heat insulation lid 17 Heat insulation lid main body 18 Expansion part 22 Heat insulation lid main body packing 23 Expansion part packing 32 Weight for adjustment

Claims (2)

An inspection opening formed in the top wall of the cooling storage body,
A heat insulating lid main body that closes the inspection opening from above, and a bulging portion that bulges downward from the heat insulating lid main body and fits into the inspection opening, so that the cool air inside the chamber is opened for inspection. A heat-insulating lid that prevents leakage from the outside of the cabinet ,
A packing for a heat insulating lid main body provided on the lower peripheral edge of the heat insulating lid main body or the top wall upper surface of the cooling storage body;
A fin-shaped bulging portion packing attached to at least one of an end surface of the inspection opening or a side surface of the bulging portion;
An adjustment weight is detachably provided on the upper surface of the heat insulating lid,
In this heat insulating lid, the peripheral edge of the heat insulating lid main body is placed on the cooling storage body main body via the packing for the heat insulating lid main body, is removable and is not restrained from moving upward all around, and the expansion of the heat insulating cover main body is not limited. Prevents misalignment at the exit,
A cooling storage box characterized in that when the internal pressure rises, the heat insulating lid that closes the inspection opening rises, and when the pressure drops after rising, the heat insulating cover closes the inspection opening . The cooling storage according to claim 1 , wherein the adjustment weights are detachably provided at four corners of the upper surface of the heat insulating lid .

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