JPH0646854Y2 - Cooling container for vacuum precooling - Google Patents

Description

[Detailed Description of the Invention] [Industrial field] When the harvested fruits and vegetables are shipped to the market, etc., the fruits and vegetables are cooled in order to keep them fresh. That is, precooling is performed. Examples of this pre-cooling method include a method in which fruit and vegetables are brought into contact with cold air, or a method in which fruit and vegetables are exposed to a reduced pressure to evaporate water from the surface thereof to remove latent heat and cool the vegetables. A vacuum pre-cooling method is a pre-cooling method to which cooling by evaporation latent heat of water such as fruits and vegetables is applied. The present invention relates to a cool container used in this vacuum precooling method.

[Conventional technology]

As a specific operation of the vacuum precooling method, a cold container containing fruits and vegetables is loaded into a vacuum chamber as a precooling chamber, and the pressure in the vacuum chamber is reduced to exhaust air in the container. After evaporating water from the surface of foods and the like to remove latent heat to cool fruits and vegetables and the like, the inside of the vacuum chamber is returned to atmospheric pressure again, and then it is carried out together with the container from the vacuum chamber.

In this vacuum pre-cooling method, if fruits and vegetables are stored in an air-tight heat-insulating container such as an ordinary expanded polystyrene container and loaded in a vacuum chamber in an air-tight state, the air in the container is efficiently exhausted during vacuum pre-cooling. Therefore, the fruits and vegetables inside cannot be precooled by vacuum, or the container is ruptured in vacuum and cannot be precooled. Therefore, in vacuum pre-cooling using such an airtight insulated container, the container lid is removed and the container is loaded into the vacuum chamber for vacuum pre-cooling operation, and after pre-cooling, the vacuum chamber is returned to atmospheric pressure. After that, it is necessary to attach the lid. In addition, there is a container provided with a vent valve element and a window part that can be opened and closed manually at appropriate places.However, even in such a container, the valve element and the window part are opened and loaded into the vacuum chamber. After vacuum precooling, it was necessary to return the inside of the vacuum chamber to atmospheric pressure and then manually close the valve body and the window.

[Problems to be solved by the device]

Thus, conventionally, when vacuum precooling is performed using an airtight heat-insulating container, the container lid is removed during precooling, or the ventilation valve and window are opened and loaded into the vacuum chamber. In addition, after the pre-cooling, it is necessary to return the inside of the vacuum chamber to atmospheric pressure and attach the lid again, or close the ventilation valve and the window. Moreover, when the lid is attached or the ventilation valve and the window are closed as described above, it is necessary to sequentially reload the containers stacked in the vacuum chamber, which requires considerable labor and labor. In addition, it takes a long time (for example, from 1 hour to 1) to load all the containers and attach the lid, and complete the closing work of the valve body and the window.
Since it takes several hours), the temperature of fruits and vegetables in the container preliminarily precooled rises during this time, and there is a problem that the precooling effect is lost.

Therefore, the function required as a cold pre-cooling container for vacuum pre-cooling is that it can be loaded into the vacuum chamber with the container completely closed, and during vacuum pre-cooling, the air in the container is efficiently exhausted and the fruit and vegetables are exposed to the latent heat of evaporation of water. It is necessary to have a function that allows the inside of the container to return to atmospheric pressure easily after cooling is completed, and after that, it will exhibit the same or almost the same cold insulation power as a completely sealed container. There is a longing for what can be done. As described above, when the inside of the container cannot be easily returned to the atmospheric pressure after the completion of cooling, the container in the reduced pressure state is crushed by the atmospheric pressure when the inside of the vacuum chamber is returned to the atmospheric pressure.

Therefore, the present invention has all the functions required for the cold pre-cooling container for vacuum pre-cooling as described above, and can be loaded in the vacuum chamber with the container completely closed, and the air in the container is efficiently exhausted during the vacuum pre-cooling. The fruits and vegetables are smoothly vacuum-cooled, and after cooling is complete, the inside of the container can be easily returned to atmospheric pressure, and after that, it can exhibit the same cold insulation power as a completely sealed container. It does not require operations such as attaching and detaching the body, opening and closing the valve body for ventilation, opening and closing the window, and reassembling the container for that purpose, and it is possible to perform extremely efficient vacuum precooling without impairing the precooling effect. It is intended to provide a container.

[Means for Solving the Problems]

In order to achieve the above object, the cold pre-cooling container according to the present invention comprises an exhaust hole and an air supply hole at appropriate positions of a container body and a lid body made of foam synthetic resin, and the exhaust hole is ,
A diameter-increased portion formed in the middle portion, a diameter-reduced inlet opening from the diameter-enlarged portion to the inside of the container, and a diameter-reduced outlet opening from the diameter-enlarged portion to the outside of the container, In the expanded diameter portion, a valve body provided with a non-breathable valve plate on one surface of a block-shaped support portion made of foamed elastic material is used as an inlet of the non-permeable valve plate opened inside the container from the expanded diameter portion. While being fitted to the opening edge while being pressed into contact with the elastic force of the block-shaped support portion,
The exhaust hole is composed of a diameter-increased portion formed in an intermediate portion thereof, a diameter-reduced inlet opening from the diameter-enlarged portion to the outside of the container, and a diameter-reduced outlet opening from the diameter-increased portion to the inside of the container. In the expanded portion of the air supply hole, a valve element provided with a non-breathable valve plate on one surface of a block-shaped support portion made of foamed elastic material, the non-breathable valve plate from the expanded portion to the outside of the container. It is fitted into the opening edge of the opened inflow port while being pressed against it by the elastic force of the block-shaped support portion.

[Action]

In the cold preserving container for vacuum pre-cooling according to the present invention as described above, when the lid is closed, the exhaust hole and the air supply hole are provided, and the valve elements fitted to the expanded diameter portions of the exhaust hole and the air supply hole respectively flow due to the elastic force of the block-shaped support portion. The inlet is hermetically closed with a non-ventilated valve plate. Then, in order to vacuum-precool fruit vegetables using this cold pre-cooling container, the fruit containers are stored in the container body,
It is loaded into a vacuum chamber which is a pre-cooling chamber in a completely closed state with a lid attached. Then, when the inside of the vacuum chamber is evacuated and decompressed, the atmospheric pressure inside the vacuum chamber outside the container is lower than the atmospheric pressure inside the container, so that it was fitted into the expanded diameter part of the exhaust hole provided in the proper place of the container. The valve body is constructed such that the air-impermeable valve plate opens the inflow port inside the container while compressing the block-shaped support portion on the back side against the elastic force by the atmospheric pressure inside the container, and the air in the container is exhausted. It is exhausted to the outside of the container through the hole. By this exhaust, the inside of the container is decompressed to evaporate water from the surface of the fruits and vegetables contained therein to remove latent heat and cool the fruits and vegetables. At this time, in the air supply hole provided in the container, the non-breathable valve plate of the valve body fitted in the expanded diameter portion of the air supply hole is provided with the pressure inside and outside the container in addition to the elastic force of the block-shaped support portion. Due to the difference, it is pressed against the opening edge of the inlet opening to the outside of the container and is in a closed state. Then, when the pressure inside the container is reduced to the same level as the inside of the vacuum chamber and the pressure difference between the inside and outside of the container disappears, the valve body of the exhaust hole opens the air-impermeable valve plate inside the container by the elastic force of the block-shaped support portion. The container is brought into an airtight state by being pressed against the opening edge of the inflow port. Also, after pre-cooling,
When the inside of the vacuum chamber is returned to atmospheric pressure, the valve body fitted to the expanded diameter portion of the air supply hole provided in the container has a non-breathable valve plate that causes the block-shaped support portion on the back side of the valve body to be compressed by the pressure outside the container. While compressing against the elastic force, the inflow port opened to the outside of the container is opened, and the air inside the vacuum chamber outside the container is introduced into the container through the air supply hole, so that the inside of the container returns to atmospheric pressure. To do. At this time, in the other exhaust hole, due to the pressure difference between the inside and outside of the container, the non-breathable valve plate of the valve body fitted to the expanded diameter portion of the exhaust hole, in addition to the elastic force of the block-shaped support portion, The air supply hole is closed by being pressed into contact with the opening edge of the inflow port opened inside the container. When the inside of the container returns to atmospheric pressure and the pressure difference between the inside and outside of the container disappears, the valve body of the air supply hole is opened by the elastic force of the block-shaped support portion to the outside of the container by the air-impermeable valve plate. The container is brought into pressure contact with the edge, and the container becomes airtight again. In this airtight condition, the container is unloaded from the vacuum chamber and shipped.

〔Example〕

The cold preservation container for vacuum precooling according to the present invention will be described in more detail with reference to the illustrated embodiment. FIG. 1 shows a first embodiment of a cold pre-cooling container for vacuum precooling according to the present invention. In this vacuum pre-cooling cold container, the container body 1 and the lid 2 are made of a foamed synthetic resin in the usual manner, as in a conventional cold container in which objects to be kept cold such as fruits and vegetables are stored. Usually, the container body 1 and the lid 2 are made of expanded polystyrene resin, but various expanded synthetic resins such as expanded polyethylene, expanded polypropylene, expanded polyurethane are also adopted. In the figure,
Reference numeral 3 is an exhaust hole formed at an appropriate position of the lid body 2, and reference numeral 4 is an air supply hole. As shown in FIG. 2, each of the exhaust hole 3 and the air supply hole 4 is formed with an enlarged diameter portion 6 having a slightly enlarged diameter in the middle portion and both ends thereof are reduced in diameter to open inside and outside the container. In the exhaust hole 3, the reduced diameter portion that opens from the enlarged diameter portion 6 at the middle portion to the inside of the container is used as the inlet 7, and the reduced diameter portion that opens from the enlarged diameter portion 6 to the outside of the container is the outlet. 8, and a valve body 5 in which a non-breathable valve plate 10 is provided on one surface of a block-shaped support portion 9 made of a foamed elastic resin material in the expanded diameter portion 6,
The non-breathable valve plate 10 is fitted to the opening edge of the inflow port 7 opening from the expanded diameter portion 6 to the inside of the container in a state of being pressed against the elastic force of the block-shaped support portion 9. On the other hand, in the air supply hole 4, a diameter-reduced portion that opens from the intermediate diameter-expanded portion 6 to the outside of the container serves as an inlet 7, and a diameter-reduced portion that opens from the diameter-enlarged portion 6 to the inside of the container serves as an outlet 8. In addition, in the expanded diameter portion 6, a block-shaped support portion 9 made of a foamed elastic resin material is provided.
The valve body 5 having a non-breathable valve plate 10 provided on one side thereof is provided with elasticity of the block-shaped support portion 9 at the opening edge of the inflow port 7 that opens the non-breathable valve plate 10 from the enlarged diameter portion 6 to the outside of the container. It is fitted in a state of being pressed by force.

In the first embodiment, the upper surface of the lid body 2 is recessed, and the enlarged diameter portions 6, 6 of the exhaust hole 3 and the air supply hole 4 are formed so as to communicate with the recessed portion 2 ′. In the case of No. 3, a reduced diameter inlet 7 is formed from the expanded diameter portion 6 to the inside of the container, and in the air supply hole 4, a reduced diameter outlet of the expanded diameter portion 6 is opened to the inside of the container. 8 is formed, and a lid plate 2 ″ that is installed inside the recessed portion 2 ′ of the lid body 2 is connected to the enlarged diameter portion 6 of the exhaust hole 3 and has a reduced diameter outlet 8 that opens to the outside of the container. , Is formed by forming a reduced-diameter inlet port 7 communicating with the expanded diameter portion 6 of the air supply hole 4 and opening to the outside of the container,
By inserting the valve bodies 5 and 5 into the enlarged diameter portions 6 of the exhaust hole 3 and the air supply hole 4, respectively, and by mounting the lid plate 2 ″ in the recessed portion 2 ′ of the lid body 2, The non-breathable valve plate 10 of the valve body 5 is fitted in a state of being pressed against the opening edges of the inflow ports 7, 7 of the exhaust hole 3 and the air supply hole 4, respectively.

The block-shaped support portion 9 of the valve body 5 fitted into each of the expanded diameter portions 6 of the exhaust hole 3 and the air supply hole 4 is a synthetic resin foam having open cells having air permeability, for example, a urethane foam, or the like, or Closed-cell synthetic resin foam is used. In addition, the non-breathable valve plate 10 provided on one surface of the block-shaped support portion 9 is a simple synthetic resin, a soft synthetic resin,
A plate, a film, a sheet, or the like made of paper, wood, metal, or the like is used as appropriate. Further, in order to improve the airtightness of the non-breathable valve plate 10, good contact with the opening edge of the expanded hole portion 6 of the exhaust hole 3 or the air supply hole 4 on the inflow port 7 side, such as soft rubber or foam. It can be said that a preferable mode is to use a polyethylene sheet or the like. Further, the block-shaped support portion 9 and the non-breathable valve plate 10 constituting the valve body 5 are not limited to those described above, and the block-shaped support portion 9 is made of, for example, an open-cell urethane foam having air permeability. A non-breathable valve plate 10 may be coated or sprayed with a paint that impairs breathability on one side thereof. In short, the non-breathable valve plate 10 inhibits the breathability on one side of the block-shaped support portion 9. The configuration is not limited in any way.

The cold-preserving container for vacuum precooling according to the present invention constructed as described above has a non-air-permeable valve plate of each valve body 5 provided in the exhaust hole 3 and the air supply hole 4 in a normal closed state. 10 is brought into pressure contact with the opening edge of the inflow port 7 by the elastic force of the block-shaped support portion 9 so that the exhaust hole 3 and the air supply hole 4 are both closed and in an airtight state. Then, in order to perform vacuum pre-cooling of fruits and vegetables using this container, fruits and the like which are objects to be cooled are housed in the container body 1, and the lid body 2 is attached to the container body 1 to completely close the lid. Then, this container is loaded into a vacuum chamber as a pre-cooling chamber, and the interior of the vacuum chamber is evacuated to reduce the pressure to perform pre-cooling. At this time, when the pressure in the vacuum chamber is reduced, the non-breathable valve plate 10 of the valve body 5 fitted in the expanded diameter portion 6 of the exhaust hole 3 provided in the lid 2 is accompanied by the pressure reduction in the vacuum chamber. The inflow port 7 opened inside the container is opened while compressing the block-shaped support portion 9 made of the foamed elastic material against the elastic force by the pressure difference between the inside and the outside of the container. When the block-shaped support portion 9 is an air-permeable open-cell foam material, the air inside the container passes from the inflow port 7 through the block-shaped support portion 9 in the expanded diameter portion 6 to open to the outside of the container. The air is discharged from the outlet 8 to the outside of the container. Further, when the block-shaped support portion 9 is a non-air-permeable member, the air inside the container flows out from the inlet port 7 through the gap between the wall surface of the expanded diameter portion 6 and the outer surface of the block-shaped support portion 9 to the outside of the container. It is exhausted to the outside of the container from 8. Further, when the block-shaped support portion 9 is made of a non-breathable member, as shown in FIGS. 3 and 4,
On the wall surface of the expanded diameter portion 6 of the exhaust hole 3, from the expanded diameter portion 6 to the outlet port 8.
If the ventilation groove 11 communicating with is provided as a recess, the air in the container is efficiently exhausted to the outside of the container through the ventilation groove 11. Although not shown, the ventilation groove 11 has a block-shaped supporting portion 9
It may be provided on the outer surface of. At the time of exhausting the air in the container, in the other air supply hole 4, due to the pressure difference between the inside and the outside of the container, the air permeability of the valve body 5 fitted to the expanded diameter portion 6 of the air supply hole 4 is not air-permeable. The valve plate 10 is pressed against the opening edge of the inflow port 7 opened to the outside of the container due to the pressure difference between the inside and outside of the container in addition to the elastic force of the block-shaped support portion 9, and the air supply hole 4 is closed. Then, in the state where the pressure inside the container is reduced to the same level as the inside of the vacuum chamber and the pressure difference between the inside and the outside of the container disappears, the valve body 5 of the exhaust hole 3 is removed.
The non-breathable valve plate 10 is pressed against the opening edge of the inflow port 7 that opens inside the container by the elastic force of the block-shaped support portion 9, and the container becomes airtight.

Next, when the inside of the vacuum chamber is returned to the atmospheric pressure after the completion of the pre-cooling, the valve body 5 fitted in the expanded diameter portion 6 of the air supply hole 4 is pressed against the opening edge of the inflow port 7 opened to the outside of the container. The non-breathable valve plate 10 opens the inflow port 7 while compressing the block-shaped support portion 9 on the back side thereof by the air pressure outside the container, and the air in the vacuum chamber outside the container is introduced into the container through the air supply hole 4. As a result, the inside of the container returns to atmospheric pressure. At this time, in the other exhaust hole 3, the expanded diameter portion 6 of the exhaust hole 3 is
In the state where the non-breathable valve plate 10 of the valve body 5 fitted to the container is pressed against the opening edge of the inflow port 7 opened inside the container due to the pressure difference between the inside and outside of the container in addition to the elastic force of the block-shaped support portion 9. The exhaust hole 3 is in a closed state. When the inside of the container returns to atmospheric pressure and the pressure difference between the inside and the outside of the container disappears, the valve body 5 of the air supply hole 4 is aerated by the elastic force of the block-shaped support portion 9 and the air-impermeable valve plate 10 is provided.
Is pressed against the opening edge of the inflow port 7 opened to the outside of the container, the air supply hole 4 is closed, the container becomes airtight again, and in this airtight state, the container is unloaded from the vacuum chamber and shipped.

As described above, in the vacuum precooling cold container according to the present invention, the exhaust hole 3 and the air supply hole 4 are provided at appropriate places of the container, and the exhaust hole 3 is opened inside the container and the air supply hole 4 is provided. The non-ventilated valve plate 10 of the valve body 5 is pressed against the opening edges of the respective inflow ports 7, 7 that open to the outside of the container by the elastic force of the block-shaped support portion 9 to connect the exhaust hole 3 and the air supply hole 4. Since it is provided in a closed state, the one-way check valve that opens and closes at the exhaust hole 3 from inside the container to the outside of the container and at the air supply hole 4 from outside to the inside of the container by the pressure difference inside and outside the container. The structure is formed. Therefore, by simply holding the cold-preserved material such as fruits and vegetables in the container and loading it in the vacuum chamber and depressurizing the vacuum chamber, the air in the container is efficiently exhausted from the exhaust holes 3 to depressurize the container. ,
Water can be evaporated from the surface of the stored fruits and vegetables, and the fruits and vegetables can be cooled by the latent heat of vaporization to be pre-cooled, and when the vacuum chamber is returned to atmospheric pressure after pre-cooling, air is introduced into the container from the air supply hole 4. Can be introduced to easily restore the atmospheric pressure. Moreover, in the state where the pressure difference between the inside and the outside of the container is reduced after precooling, the exhaust hole 3 and the air supply hole 4
In both cases, the non-breathable valve plate 10 of the valve body 5 provided therein closes the inflow port 7 by the elastic force of the block-shaped support portion 9, so that the flow of air inside and outside the container is blocked and the temperature of the outside air is Prevent impact.

As described above, the cold pre-cooling container according to the present invention can be loaded as a container in the vacuum chamber with the lid completely closed, and during the vacuum pre-cooling, the air in the container is efficiently exhausted to smoothly vacuum the fruits and vegetables. After cooling, and after the cooling is completed, the inside of the container can be easily returned to the atmospheric pressure, and during the pre-cooling operation, the lid 2 is attached to and detached from the container body 1, and the work for opening and closing the ventilation valve body and the window is not performed. It is completely unnecessary. Further, in the check valve structure provided in the exhaust hole 3 and the air supply hole 4, the expanded-diameter portion 6 provided in the intermediate portion of the exhaust hole 3 and the air supply hole 4 has a block-shaped support portion 9 made of a foam elastic material and its support. Since the valve body 5 composed of the non-breathable valve plate 10 provided on one surface is fitted, the airtight state is maintained by the elastic force of the block-shaped support portion 9 reliably when there is no pressure difference between the inside and the outside of the container. It can be closed at all times, no malfunction occurs, and the non-breathable valve plate 10 is always opened and closed uniformly in the state of being aligned by the elastic force of the block-shaped support portion 9 to ensure the opening and closing operation. To be seen. Further, the valve body 5 provided in the exhaust hole 3 and the air supply hole 4 includes a block-shaped support portion 9 made of a foamed elastic material and a non-breathable valve plate 10.
Since it is composed of and has extremely excellent heat insulation,
Even after pre-cooling, the temperature of the outside air is surely shut off by this valve body 5 and does not affect the inside of the container, and it is possible to maintain a good cold-keeping condition of the pre-cooled fruit and vegetables in the container. It can exhibit the same cold insulation power as a sealed container.

Next, FIGS. 5 and 6 show a second embodiment of the vacuum precooling container according to the present invention. The vacuum precooling container of the second embodiment is similar to that of the first embodiment, in which the exhaust hole 3 and the air supply hole 4 are provided on the upper surface of the lid body 2, but here, the lid body 2 is used. In the state where the recess 12 extending from one side end to the other side end on the long side of the container is crossed over the lid plate 2 ″ attached to the recessed portion 2 ′ provided on the top surface of the lid body 2, The cover plate 2 ″ is provided so as to communicate with the exhaust hole 3 and the air supply hole 4, and is otherwise basically the same as the first embodiment. Thus, by providing the exhaust hole 3 and the air supply hole 4 on the upper surface of the lid body 2 and providing the recess 12 extending to the side end of the container in communication with the exhaust hole 3 and the air supply hole 4, When pre-cooling is performed by exhausting and depressurizing the vacuum chamber in a state where the closed containers in which the lid body 2 is attached to the container body 1 are stacked in the vacuum chamber, when exhausting and depressurizing the vacuum chamber, the exhaust and the interior of the container through the recess 12 are performed. The air can be efficiently supplied to. In addition, in this embodiment, the recess 12 is provided so as to extend to both side ends of the container, but the recess 12 may extend to at least one side end.

Furthermore, FIGS. 7 and 8 show a third embodiment of the cold preserving container for vacuum precooling according to the present invention. The cold preserving container for vacuum precooling according to the third embodiment is provided with a notch 14 that is open upward on the end side of the side wall 13 of the container body 1, and is continuously formed in the widthwise center of the side wall 13 around the notch 14. The groove 15 is formed intermittently or intermittently, and has a thickness substantially the same as the width of the side wall 13, and at the side end of the portion corresponding to the groove 15 provided in the side wall 13 around the cutout portion 14. The convex portion 16 is provided and the exhaust hole 3
The auxiliary insertion plate 17 provided with the air supply hole 4 and the air supply hole 4 is formed by fitting the convex portion 16 into the concave groove 15 and inserting it into the notch portion 14. Further, the illustrated auxiliary insertion plate 17 is divided into two at the substantially central portion in the width direction, and the exhaust hole 3 is provided across both the divided members.
And the inflow port 7 and the outflow port 8 which form the expanded diameter portions 6 of the air supply hole 4 and which are opened from the expanded diameter portion 6 inside and outside the container, respectively.
In the state in which the valve body 5 is sandwiched between the divided members with the non-ventilating valve plate 10 facing the inflow port 7 side of the exhaust hole 3 and the air supply hole 4, respectively, By simply inserting the auxiliary insertion plate 17 into the cutout portion 14, the exhaust hole 3 and the air supply hole 4 having the valve body 5 having a check valve function therein can be easily provided in the container body 1. Of. Therefore, by providing such a cutout 14 at an appropriate position on the container body 1 or the lid body 2, the exhaust hole 3 and the air supply hole 4 having the check valve function can be easily provided at the appropriate places on the container body 1 or the lid body 2. That is, the cold preserving container for vacuum precooling of the present invention can be constructed.

Further, in the cold preserving container for vacuum precooling according to the present invention, the exhaust hole 3 and the air supply hole 4 having the check valve function are provided in the lid body 2 regardless of the first to third embodiments described above. Top surface,
It may be provided on any one of the side wall 13 of the container body 1 and the lower surface of the container body 1.

If it is necessary to further increase the airtightness of the cold storage container after completing the vacuum pre-cooling, for example, carbon dioxide generated by respiration of fruits and vegetables, which are the objects to be kept cold in the container, is released to the outside of the container as much as possible. In order to maintain a high degree of freshness by holding it inside the container without attaching it, an adhesive tape or an adhesive tape is adhered to the surface of the exhaust hole 3 and the air supply hole 4 provided in the container body 1 or the lid body 2. Or gluing, applying, or pouring other sealing materials into the exhaust hole 3
The air supply hole 4 may be completely sealed.

[Effect of device]

As described above, the vacuum pre-cooling cold container according to the present invention is provided with the exhaust hole and the air supply hole, which have the check valve function, in the proper positions of the container body and the lid body made of foamed synthetic resin. A container to be kept cold such as fruits and vegetables can be loaded into the vacuum chamber with a completely closed lid as a container, the air in the container is efficiently exhausted from the exhaust hole during vacuum pre-cooling, and fruits and vegetables are smooth. When the inside of the chamber is vacuum-cooled and is returned to the atmospheric pressure after the cooling is completed, the inside of the container is opened without being damaged by the atmospheric pressure because the air is easily supplied from the air supply hole into the container. Can return to atmospheric pressure. Therefore, the work of attaching and detaching the lid to the container body and opening and closing the vent valve and the window during the precooling operation is completely unnecessary, and the vacuum precooling operation can be performed very efficiently, and the lid after precooling is performed. There is no loss of precooling effect due to the rise in temperature of fruits and vegetables that have been precooled during the work of attaching the body or closing the ventilation valve and the window. Further, as a check valve structure provided in the exhaust hole and the air supply hole, a foam-like elastic block-like support part and a non-ventilating part provided on one side of the expanded part provided in the middle part of the exhaust hole and the air supply hole. A valve body made of a flexible valve plate is fitted in a state in which the non-breathable valve plate is pressed against the opening edge of the inflow port by the elastic force of the block-shaped support portion, so that there is no pressure difference between the inside and outside of the container. The non-breathable valve plate can securely close the inflow port of the exhaust hole and the air supply hole by the elastic force of the block-shaped support portion, and as described above, the opening and closing of the valve element is supported by the block-shaped support due to the pressure difference inside and outside the container. Since it is performed by compression of the part, malfunction of the valve does not occur. Moreover, the non-breathable valve plate is uniformly opened and closed by the elastic force of the block-shaped support portion while always being aligned. In addition, the valve element provided in the exhaust hole and the air supply hole as described above,
Since it is composed of a block-shaped support made of foamed elastic material and a non-breathable valve plate and has extremely excellent heat insulation, the temperature of the outside air is reliably shut off by this valve element and affects the inside of the container. It is possible to maintain the cold state of the pre-cooled fruit vegetables and the like in the container well without giving them, and it is possible to exhibit the cold insulating power equivalent to that of the completely sealed container.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a first embodiment of a cold container for vacuum precooling according to the present invention, FIG. 2 is a vertical sectional view thereof, and FIG. 3 is an enlarged vertical sectional view of its essential portion. , FIG. 4 is also an enlarged cross-sectional view of the main part,
FIG. 5 is a perspective view showing a second embodiment, FIG. 6 is a longitudinal sectional view thereof, FIG. 7 is a perspective view showing a third embodiment, and FIG. 8 is an enlarged transverse sectional view of its main part. 1: Container body, 2: Lid body, 3: Exhaust hole, 4: Air supply hole, 5: Valve body, 6: Expanded part, 7: Inlet port, 8: Outlet port, 9: Block-shaped support part, 10: Non-breathable valve plate, 11: ventilation groove, 12: recess, 13: side wall, 14: notch, 15: concave groove, 16: convex portion, 17: auxiliary insertion plate.

Claims (6)

[Scope of utility model registration request] 1. A container body made of a foamed synthetic resin and a lid body are provided with an exhaust hole and an air supply hole at appropriate places, and the exhaust hole has an enlarged diameter portion formed at an intermediate portion thereof, and from the enlarged diameter portion. It consists of a reduced diameter inlet opening to the inside of the container and a reduced diameter outlet opening from the expanded diameter portion to the outside of the container.The expanded diameter portion of the exhaust hole is provided with a block-shaped support portion made of a foamed elastic material. In a state in which the valve body provided with a non-breathable valve plate on one surface is pressed against the opening edge of the inflow port that opens the inner side of the non-breathable valve plate to the inside of the container by the elastic force of the block-shaped support portion. While being fitted, the air supply hole has a diameter-increased portion formed in an intermediate portion thereof, a diameter-reduced inlet opening from the diameter-enlarged portion to the outside of the container, and a diameter-reduction portion opened from the diameter-increased portion to the inside of the container. A non-breathable valve plate is provided on one side of the block-shaped support made of foamed elastic material at the expanded portion of the air supply hole. Insulation for vacuum precooling, in which the non-breathable valve plate is fitted to the opening edge of the inflow port opened from the expanded portion to the outside of the container in a state of being pressed by the elastic force of the block-shaped support portion. container. 2. A cold preserving container for vacuum precooling according to claim 1, wherein a foamed elastic material having air permeability is used as the block-shaped support portion of the valve body. 3. A foamed elastic material having closed cells is used as a block-shaped support portion of a valve element, and an exhaust hole or an air supply hole is formed in a wall surface of an enlarged diameter portion of the exhaust hole or the air supply hole or in the block-shaped support portion. The cold preserving container for vacuum precooling according to claim 1, wherein a ventilation groove is formed so as to communicate from the expanded diameter portion to each outlet. 4. The vacuum according to claim 1, wherein a recess extending to at least one side end of the container is provided on the upper surface of the lid, and the exhaust hole and the air supply hole are provided in communication with the recess. Cooling container for pre-cooling. 5. A notch opening upward is provided on a side wall of the container body, and a concave groove is formed continuously or intermittently in the widthwise center of the side wall around the notch, and the exhaust gas is provided. The vacuum precooling according to claim 1, wherein an auxiliary insertion plate having a hole and an air supply hole is formed by fitting a convex portion provided at a side end of the auxiliary insertion plate into the concave groove and inserting the auxiliary insertion plate into the notch. Cold storage container. 6. The cold preserving container for vacuum precooling according to claim 1, wherein the exhaust hole and the air supply hole are provided on either the upper surface of the lid, the side wall of the container body, or the lower surface of the container body.