JPH02626B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a differential pressure ventilation type cooling device, and more specifically, the present invention relates to a differential pressure ventilation type cooling device, and more specifically, to The present invention relates to a differential pressure ventilation type cooling device that can increase space efficiency in a storage and increase differential pressure cooling efficiency by providing a sealing member surrounding an air vent.

(Prior Art) A differential pressure cooling method has recently been adopted for cooling agricultural products such as vegetables in warehouse-type refrigerators.

This differential pressure cooling method creates a positive pressure part and a negative pressure part in the refrigerator, and uses this pressure difference to move cold air.If there is a ventilation hole in the container that holds the agricultural products, the cold air will flow through the ventilation hole. It penetrates into the container and penetrates into the gaps between the crops, uniformly cooling the crops, and then escaping from the other ventilation hole, so there is no uneven cooling, and the crops do not sweat during cooling. Has many advantages. Refrigerators that utilize this differential pressure ventilation system include those in which the wall of the refrigerator is made into a double wall to form a duct, with an air inlet at the bottom of the inner wall and an air outlet at the top, in which a pressure fan is installed. , an air intake port is provided at the lower part of the side wall of the casing, and an opening duct is formed at the upper part, so that a portable air blower in which the air intake port and the opening duct are connected via a ventilation fan provided in the casing can be freely moved inside the refrigerator. What is installed is known. In this case, the objects to be cooled are piled up in two blocks surrounding the air intake port, with a fixed interval in the middle.
This space is covered with an airtight sheet leaving an air intake port to form a duct, and then a blower fan is driven to create a pressure difference between the outside and inside of the object to be cooled, causing cold air to move. It is.

(Problems to be Solved by the Invention) Both of the above devices are extremely superior in that they can uniformly cool the entire crop, but in the case of the former, the interior is formed into a double wall, so the design It is not easy to construct, and the design is different for each storage, resulting in high costs.In addition, the space inside the storage is wasted due to the double walls, and space efficiency is poor. This is extremely inconvenient when storing large quantities of fruits such as apples, when the market is stocking large amounts of vegetables during holidays, or during the winter when the market is simply used as a warehouse.

Also, in the latter case, since the blower is brought directly into the refrigerator, the effective space inside the refrigerator is similarly reduced.

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned difficulties, and its objectives are to improve space efficiency in the refrigerator, increase differential pressure cooling efficiency, and facilitate design and construction. An object of the present invention is to provide a differential pressure ventilation type cooling device that can reduce costs. Another feature of the refrigerator is that it has an air inlet at the bottom of the wall of the refrigerator, and a corresponding outlet at the top of the wall.The air inlet and outlet are communicated via an external duct, and the air is blown into the external duct. A fan is provided on the wall surface of the refrigerator, and a sealing member made of an elastic body is provided on the wall surface of the refrigerator, sandwiching the air intake port and protruding from the wall surface at least in the vertical direction, and an object to be cooled is placed in the wall surface of the refrigerator, and an object to be cooled is placed in the wall surface of the refrigerator. In order to cover the space in front of the wall surface with an airtight sheet when stacking the air intake ports surrounding the air intake ports so as to contact the member and to form a space in front of the air intake ports, A sheet winding drum capable of winding up an airtight sheet is supported in the horizontal direction in the upper part of the refrigerator.

(Function) Since the ventilation fan, ventilation duct, etc. are provided outside the refrigerator, there are no protruding objects inside the refrigerator, and the space inside the refrigerator can be used effectively.

Since the object to be cooled is brought into contact with the elastic sealing member, airtightness between the wall surface and the object to be cooled is ensured, and differential pressure can be effectively created by covering with an airtight sheet. can improve cooling efficiency.

Moreover, since this sealing member is designed to protrude from the wall surface, the wall surface of the refrigerator will not be damaged when objects to be cooled are brought into contact with each other and piled up.

(Embodiments) Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The differential pressure ventilation type cooling device according to the present invention is broadly divided into a storage 10 and a cold air blowing unit 12.

The storage 10 has a heat insulating structure similar to that of a general refrigerator, and an opening 14 is provided at the lower part of the wall surface to accommodate the air blower unit 12, as will be described later.

Further, the opening 1 is located near the ceiling of the storage 10.
A blow-off duct 16 having one end opened at the upper part of the wall surface corresponding to No. 4 and the other end extending into the storage 10 is installed horizontally, and the blow-off duct 16 is provided with blow-off ports 18 at appropriate intervals.

The blower unit 12 is generally constructed of a rectangular parallelepiped-shaped casing using a heat insulating material.

One side wall surface 20 of the casing is formed in substantially the same shape as the opening 14, and the blower unit 1
2 is integrated with the storage 10 by fitting and fixing the side wall surface 20 into the opening 14 so as to protrude outside the storage 10. Therefore, side wall surface 2
0 constitutes a part of the wall surface of the storage 10. A vertically elongated rectangular air intake port 22 is provided at the lower center of the front surface of the side wall surface 20, and an air duct 24 that communicates with the inside of the casing is provided at the upper part of the casing. 16.

Reference numeral 26 denotes an air blowing fan such as a Sirotskov fan provided in the casing.The suction side of the air blowing fan 26 communicates with the air intake port 22, and the discharge side of the air blowing fan 26 communicates with the air duct 24. 28 is a motor for driving the ventilation fan 26.

Reference numeral 30 denotes a cooling mechanism, the heat absorption part 32 of which is disposed in a communication path between the blower fan 26 and the air intake port 22, and cools the air flowing in the communication path when the blower fan 26 is driven. In this case, the blowing fan 26 serves both as a fan for a heat absorption section in a commonly used cooler and a fan for forcefully feeding cold air into the storage 10, and has a predetermined capacity.
Note that the air intake port 22, the ventilation fan 26, the heat absorption part 32,
They may be arranged in the order of the ventilation ducts 24.

34 is a compressor, and 36 is a condenser.

In order to increase the cooling efficiency, the cold air distribution route includes a compressor 34, a condenser 36, and a blower fan 2.
It is thermally isolated as much as possible from heat generating sources such as the drive motor 28 of No. 6. In addition to using a heat insulating material as this blocking means, it is conceivable to install the heat generation source outside the casing.

Next, reference numeral 38 denotes a sealing member provided outside the side wall surface 20, which is made of an elastic material such as a rubber member that can be filled with air. It is formed. Note that the seal member 38 is not limited to the above, and may be formed in a shape so as to surround the air intake port 22 from three sides except for the lower side of the air intake port 22.
A plurality of them may be provided on both sides of the outside.

An elongated sheet winding drum 40 is horizontally and rotatably disposed on the side wall surface 20 above the sealing member 38, and a central shaft 42 of the drum 40 is connected to a drive shaft of a winding motor 44 via a coupler. Connect to 46. An airtight sheet 48 is wound around the drum 40, and this airtight sheet 48 is pulled out by input or by reversing the winding motor 44, and the side wall surface 20 is pulled out.
The front can be covered with this airtight sheet 48. As another example, although not shown, in an existing refrigerator or storage unit equipped with a cooling mechanism,
The blower unit 12 may be incorporated in the same manner as described above. In this case, the cooling mechanism may be used in combination with an existing one, or a blower unit (not shown) without the cooling mechanism may be used.

In each of the above embodiments, the blower was explained in the form of a unit, but it is not limited to a unit.In short, the blower is provided outside the refrigerator with an air intake port provided at the bottom of the wall of the refrigerator and a discharge port provided at the top of the wall. It is sufficient to communicate through a duct, and provide a blower fan in the duct, as well as provide a sealing member and an airtight sheet on the wall surface of the refrigerator in the same manner as in the above embodiment. Further, in this case, the cooling mechanism may be provided within the duct.

Next, a method of using the differential pressure ventilation type cooling device according to the present invention will be explained.

First, as shown in FIGS. 1 and 2, a container 50 with holes containing agricultural products is placed on a pallet 52 and transported by a forklift, and then transported to the air intake port 22.
The blocks are stacked in two blocks surrounding the air intake port 22 in front of the block so that there is a certain space in the middle. In this case, the ends of the first container 50' and the pallet 52 come into contact with the sealing member 38, so that the impact during stacking is alleviated and the airtightness between the container 50 and the side wall surface 20 is maintained. After stacking the containers 50, the airtight sheet 48 is pulled out and covers the upper surface of the container 50, leaving the air intake port 22 side open, so as to seal the space. Next, the ventilation fan 26
By driving the cooling mechanism 30, the air in the space in front of the air intake port 22 is sucked, cooled, and discharged from the air outlet 18 of the air outlet duct 16 into the storage 10. A pressure difference is created between the side and the storage 10 side, and the cold air enters the container 50 through the vent hole of the container 50.
The cold air that has entered is sucked toward the air intake port 22, and after penetrating into the gaps between the crops in the container 50 and uniformly cooling the crops, it is returned to the warehouse through the air intake port 22 and from the blow-off duct 24. It is something that is discharged.

Note that when the seal member 38 is provided only in the vertical direction with the air intake port 22 in between, the airtight sheet 48 hanging along the wall surface straddles the seal member 38 due to the suction force and is attached to the wall surface as shown in FIG. Airtightness can be maintained by close contact.

Further, when a plurality of seal members 38 are provided on both sides of the air intake port 22, when stacking the containers 50, the containers 50
By abutting the abutment surfaces of 0 against two or more sealing members 38, it is convenient to easily stack them up parallel to the wall surface.

(Effects of the Invention) As described above, according to the differential pressure ventilation type cooling device according to the present invention, in addition to making maximum use of the advantages of the differential pressure cooling method such as fast cooling speed and no fear of freezing, Since the ventilation fan, ventilation duct, etc. are installed on the outside of the refrigerator, there are no protruding objects inside the refrigerator, and the space inside the refrigerator can be used extremely effectively.This can be used when storing large quantities of fruits such as apples during the winter, or when adjusting the shipment of vegetables, etc. This is extremely advantageous when a large amount of stock is being carried out: Since a sealing member and an airtight sheet are used, cold air does not enter from any path other than the object to be cooled, and differential pressure is effectively created, resulting in high cooling efficiency. In addition, since the seal member is elastic and protrudes from the wall surface, the wall surface will not be damaged even if there is a slight impact when working with a forklift.As mentioned above, the seal member creates a pressure difference. Since efficiency can be increased, it is possible to use a low-capacity blower fan and cooling mechanism, and the amount of heat generated from the blower fan cooling mechanism itself is also reduced, resulting in various remarkable effects such as energy saving. .

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of drawings]

The drawings show a preferred embodiment of the present invention, and FIG. 1 shows a longitudinal cross-sectional view thereof, and FIG. 2 shows a cross-sectional view thereof. FIG. 3 is a front view of the cold air blowing unit, and FIG. 4 is an explanatory view showing the state of the airtight sheet during air intake. 10...Storage, 12...Cold air blower unit, 14
...opening, 16...blowout duct, 18...blowout outlet, 2
0...Side wall surface, 22...Rectangular air intake port, 24...Blower duct, 26...Blower fan, 28...Drive motor,
30... Cooling mechanism, 32... Heat absorption part, 34... Compressor, 36... Condenser, 38... Seal member, 40
... Sheet winding drum, 42 ... Center shaft, 44 ... Winding motor, 46 ... Drive shaft, 48 ... Airtight sheet, 5
0,50'...Container with a through hole, 52...Pallet.

Claims (1)

[Claims] 1. An air intake port is provided at the lower part of the wall of the refrigerator, and a discharge port corresponding to the air intake port is provided at the upper part, the air intake port and the discharge port are communicated via an external duct, and a blower fan is disposed within the external duct. A sealing member made of an elastic body is provided on the wall surface of the refrigerator at least vertically so as to sandwich the air intake port and protrude from the wall surface, and the objects to be cooled are placed in such a manner that the opposing objects to be cooled come into contact with the sealing member. In order to cover the space in front of the wall with an airtight sheet when the refrigerator is stacked up surrounding the air intake so that a space is formed in front of the air intake, the refrigerator is placed above the air intake and the seal member. A differential pressure ventilation type cooling device characterized in that a sheet winding drum capable of winding up an airtight sheet is supported in the horizontal direction.