JPH02118385A - Low-temperature storage - Google Patents

Abstract

PURPOSE:To permit both storage chambers to be maintained at substantially the same temperature by a method wherein cold air is distributed into a first cold air flow passage, in which the cold air flows across an opposed pair of walls forming the first storage chamber, a second cold air flow passage, in which the cold air flows along opening surfaces, and a third cold air flow passage, in which the cold air flows in the second stage chamber. CONSTITUTION:An air flow rate regulating plate 25, regulating the flow rate of upward cold air, is arranged at the upper part of a first air outlet port 22 in a cold air supplying passage 11B while the opening areas of air outlet ports are designed to distribute the cold air so that the flow rate of the cold air through a first cold air flow passage, which is made to flow out into a storage chamber through a first air outlet port 22 and a second air outlet port, formed on a back wall, becomes larger than the flow rate of the cold air of a second cold air flow passage, which is made to flow out of an upper surface air outlet port 26, or the ratio becomes a given ratio in the degree of 7:3, for example. A slender distributing plate 36, distributing the cold air sent out of a cooling chamber 14 into the cold air supplying passage 11B and a third cold air flow passage for a communicating hole 33, is designated so that the flow rate of the cold air for the supplying passage 11B becomes larger than the amount of cold air for the communicating hole 33 or the ratio becomes 9:1, for example.

Description

[Detailed Description of the Invention] [Object of the Invention] Industrial Application Field: This invention relates to a low-temperature refrigerator having a first storage chamber for sales in the upper tier and a second storage chamber for replenishment storage in the lower tier. This invention relates to a low-temperature refrigerator that is independently cooled.

Conventional technology There is a technology disclosed in Japanese Utility Model Application Publication No. 10276/1983 for a low-temperature refrigerator (especially a freezer) that has a first storage room for display and sales in the upper part and a second storage room for replenishment storage in the lower part. As in the case of , these freezers generally used a cooling system called a direct cooling system in which cooling pipes were arranged on the outer surface of the inner box to cool each storage chamber by heat transfer from the inner box.

In these freezers, the upper storage chamber has an opening formed on its upper surface and a door that opens and closes this opening, so that products can be taken in and taken out from the upper opening, and the lower storage chamber has a door that opens and closes this opening. An opening is formed on one side (the side where the salesperson is located) and a door is provided to open and close this opening, so that replenishment products can be taken in and taken out through this opening.

Problems to be Solved by the Invention In a freezer that uses a direct cooling method as shown in the above-mentioned publication, the area where thermal elements such as outside air most greatly increase the temperature inside the storage chamber is near the top opening. Moreover, since there is no means for air convection in the storage room, and the convection is not carried out well, the cold air moves downward by natural convection, and the second storage room located at the lower level It was easier to maintain the temperature in the storage room at a lower temperature than in the first storage room located at the upper level. For this reason,
When you select a frozen dessert such as ice cream or sherbet as a stored product, the product on the lower shelf is kept at a lower temperature than the product on the upper shelf, and is maintained in a highly frozen state (so-called hard). The products in the second storage room tend to be frozen and stored in a harder state than the products in the first storage room, and when eating this product, the problem is that the products in the lower part are hard and difficult to eat. was there.

Therefore, an object of the present invention is to provide a low-temperature refrigerator having two storage compartments, upper and lower, which can be cooled independently and both can be maintained at a substantially concave temperature. .

[Structure of the invention]

Means for Solving the Problems The present invention provides a low-temperature refrigerator in which a first storage chamber with an opening on the top surface is formed in the upper tier and a second storage chamber with an opening on one side is formed in the lower tier, and includes a cooler and a blower device. A first storage chamber with an opening on one side is formed in the upper stage and a second storage chamber with an opening on one side is formed in the lower stage by removing the cooling chamber having a cooling chamber. The cold air flow path is divided into a first cold air flow path that flows across the pair of walls, a second cold air flow path that flows along the -face opening, and a third cold air flow path that flows within the second storage chamber.

On the other hand, by dividing the flow rate of cold air flowing through each cold air flow path into the relationship expressed by the following relationship: first cold air flow path > second cold air flow path > third cold air flow path, the temperature in both storage chambers can be made uniform. becomes very effective.

Function: By locating a cooling room equipped with a cooler and a blower between the first storage room on the upper level and the second storage room on the lower level, this cooling room acts as adiabatic partition between the two storage rooms. . Furthermore, the air that is cooled by passing through the cooling chamber (this is referred to as cold air) is divided into a first cold air flow path that flows inside the first storage chamber and a second cold air flow path that flows along the first storage chamber surface opening. By dividing the cold air into the cold air flow path and the third cold air flow path flowing inside the second storage chamber, the cold air flowing through each cold air flow path cools each flow path space independently. In particular, the second cold air flow path acts as an air curtain to prevent thermal elements from entering the first storage chamber, thereby suppressing a temperature rise in the first storage chamber.

On the other hand, by making the relationship of the cold air flow rate flowing through the cold air flow paths as follows: first cold air flow path > second cold air flow path > third cold air flow path, main cooling of the first storage chamber is performed, and both storage It acts to promote uniformity of temperature in the room.

Example The present invention will be described in detail below based on the drawings.

(1) shown in FIGS. 1 and 2 is a face-to-face sales-type frozen showcase that can be called a dipping case among low-temperature refrigerators.
Transparent plates (4) and (5) are provided on the customer side, that is, the front and top surfaces, and an opening (6) for handling products is provided on the sales side, that is, the back, and this opening (6) can be opened and closed to close the room. Transparent door (7)
a lid body (3) which can be positioned respectively and arranged in the upper opening of the insulation box body; a compressor, a condenser, and an air blower (all not shown) formed in the lower part of the insulation box body (2);
It consists of a machine room (8) that stores and installs the following equipment.

(10) is a metal partition plate which is disposed at an appropriate interval from the inner surface of the front and rear walls of the insulation box body (2), has front back left and right walls and a bottom wall, and has a U-shaped longitudinal section; A plate fin type cooling device that forms a cold air passage (11) on the outer periphery of the front inner wall of the plate (10) and under the bottom wall, and has a defrosting heater (H) below the bottom wall that is energized during defrosting. Vessel (12)
A cooling chamber (14) is formed with an axial blower (13) that is stopped during defrosting, and a container called a vat (hereinafter referred to as a vat) is filled with frozen desserts such as ice cream. A first storage chamber (16) with an opening on one surface, for example, the top surface, is formed to store a plurality of bats (15).

A fixing device (17) for orderly and efficiently aligning and fixing a plurality of bats (15) is disposed above the first storage chamber (16). The vat (15) is made of a material with excellent water resistance, such as corrosion-resistant steel such as stainless steel, and has an inverted trapezoidal shape with a filling part with an opening on the top for filling the frozen dessert, and a horizontally provided and fixed part around the filling part. The flange part is placed on the device (17), and the end of the flange part is bent downward over the entire circumference for protection.In addition, the flange part of each bat is connected to the flange part of the adjacent bat. and the long sides or the short sides of the fixing device are in contact with each other or are very close to each other.17)
Because the flange portion and the fixing device (17) are placed in I am doing it.

The front and back walls of the partition board (10) are covered with roses) (15)
A first suction inlet (21) and a first outlet (22) are formed in portions corresponding to the gaps formed between the sides of the bat when the bat is fixed to the fixing device (17), and
A first suction port (21) and a first air outlet (2
2) The second suction port and the second blowout port are formed with a smaller opening area than those of 2).

An air volume adjustment plate (25) for adjusting the upward flow rate of cold air is disposed above the first air outlet (22) in the supply path (IIB), and the air volume adjustment plate (25) is fixed above the air volume adjustment plate (25). An upper surface outlet (26) is formed which is opened horizontally so that cold air flows horizontally over the upper surface of the bat (15).

The air volume adjustment plate (25) is connected to the first air outlet (22) formed on the back wall.
) and a cold air flow path (
This is called the first cold air flow path) and the cold air flow rate of the upper surface outlet (
The opening area is set so that the cold air flow rate blown out from the cold air flow path (hereinafter referred to as the second cold air flow path) is divided at a certain ratio, for example, about 7:3, so that the former is larger. - On the other hand, the top air outlet (
The top suction port (26) collects the cold air blown out from the
7). A heat insulating wall (28) made of a heat insulating material is installed on the lower surface of the bottom wall of the partition plate (10) to reduce the thermal influence of warm air from the cooler (12) during defrosting. In order to prevent the warm air from being transmitted to the (16) side and to prevent this warm air from flowing out to the supply path (IIB) and return path (IIA), a hanging part (28B bar 28) is placed on the supply path side and return path side.
C). The lower end of this hanging part (28C) is located below the propeller fan (F) of the blower (13), and warm air is sent above the fan (F) to melt the frost and wood chips that have grown on the propeller fan (F). Make sure to store it.

A second storage chamber (30) is formed below the blower device (13) of the cooling room (14) as a storage room for storing replenishment vats (15B). An insulating wall (31
), and an opening is formed on the − side (in this example, the back),
A door (32) is provided to open and close this opening, so that a part of the cold air leaving the cooling chamber (14) is guided to the second storage chamber (30) through the communication hole (33). ing. (34
) is a return port formed between the end of the heat insulating wall (31) and the drainage device (35). (36) is a long and narrow branch plate that divides the cold air sent out from the cooling chamber (14) into the supply path (IIB>) and the cold air flow path (third cold air flow path) toward the communication hole (33). The flow rate to the second cold air flow path and the third cold air flow rate are set such that the amount flowing to the supply path (IIB) is larger than the amount flowing to the communication hole (33), for example, at a ratio of 9:1. When comparing the flow rate of cold air flowing into the cold air flow path, it is better to set the cold air flow rate of the second cold air flow path to be larger than that of the first cold air flow path.
The water flows along the upper opening of the storage chamber (16) and is more strongly affected by the thermal effects of light and outside air than the second storage chamber (30).
16) The amount of cold air flowing through the second cold air flow path is increased to prevent it from being transmitted inside.

From the above explanation, by comparing the magnitude of the cold air flow rate flowing through each cold air flow path, we can form a relational expression: 1st cold air flow path > 2nd cold air flow path > 3rd cold air flow path, and in this example, this is expressed as a ratio. When,
The ratio will be 6:3:1. Looking at the indoor temperatures of the first storage room (16) and the second storage room (30) at this ratio, it was found that
It was possible to maintain the temperature at around -15°C. However, the first storage room (1
When looking at the temperature of the upper and lower parts of the frozen dessert in (15), it was found that the upper part could be maintained at around -12°C and the lower part at around -15°C, and the upper part of the frozen dessert could be easily scooped out. Ta.

As mentioned above, the first storage chamber (16) in the upper tier and the second storage chamber (16) in the lower tier
The storage chambers (30) each constitute an independent cold air flow path, and each storage chamber is independently cooled by each cold air flow path. In addition, since both storage chambers (16) (3G) are connected via the cooling chamber (14), this cooling chamber (14) partitions both storage chambers (16) (3G) in an insulating manner. Therefore, the temperature influence of one storage chamber cannot be directly transmitted to the other storage chamber.

Furthermore, the cold air returned from each storage chamber is re-cooled in the cooling chamber and discharged from the cooling chamber.
) and the air volume adjustment plate (25), the first cold air flow path flowing inside the first storage chamber (16), the second cold air flow path flowing along the top opening of the first storage chamber (16), and the second storage chamber. (30) Since the cold air is divided into the third cold air flow path, the temperature of the cold air flowing into each flow path is uniform, only the flow rate is different, and thermal factors from the outside are avoided. If the flow rate is determined with consideration, it is also possible to maintain each storage chamber at a constant temperature.

As an example, when the flow rate of cold air flowing into each flow path is set in the following relationship: first cold air flow path>second cold air flow path>third cold air flow path, the flow of cold air enters through the transparent part of the lid (3). The first storage room (16), which is subject to strong thermal influences from the outside, such as light coming from outside air and entry of outside air from the opening and closing of the door (7), will be mainly cooled, so that the temperature of both storage rooms will be equalized. I was able to figure it out. For this reason, the replenishment vat is stored in the second
Put the bat (15B) in the storage room (30) into the first storage room (16).
) and put it up for sale, it becomes possible to continue selling it as it is.

〔Effect of the invention〕

As detailed above, the configuration of the present invention provides the following effects. The first storage chamber and the second storage chamber, which are formed above and below the cooling chamber, have independent cold air flow paths, so each storage chamber can be cooled independently. . Furthermore, since both storage chambers are connected via the cooling chamber, the cooling chamber acts as an insulating wall that partitions both storage chambers, and the temperature influence of one storage chamber affects the other storage chamber. It can be prevented from being transmitted.

On the other hand, since the flow rate of cold air flowing through the first cold air flow path is larger than that of the second cold air flow path, a product storage container with an opening on the top surface is arranged on one side of the first storage chamber so as to be substantially aligned with the opening on the top surface. When installed, cooling on the bottom side is promoted compared to the opening side,
The upper side of the container can be maintained at a higher temperature than the lower side. For this reason, when frozen desserts are specified as a stored product, this function is particularly effective in facilitating sales operations. In addition, the cold air flow rate flowing through the second cold air flow path is
Since the number of cold air channels is larger than that of the cold air flow path, cooling is mainly performed in the upper storage compartment, which is more affected by external thermal factors. can provide very effective cooling.

[Brief explanation of the drawing]

Each figure shows one embodiment of the present invention, and FIG. 1 is A-A in FIG.
A sectional view and FIG. 2 are perspective views of a freezing showcase as a low-temperature refrigerator. (1)...Frozen showcase (low temperature storage), (12)
...Cooler, (13) ...Blower, (14)
...Cooling room, (16)...First storage room, (30)
...Second storage room.

Claims (1)

[Scope of Claims] 1. A first storage chamber with an opening on one side is formed in the upper stage and a second storage chamber with an opening on one side is formed in the lower stage, sandwiching a cooling chamber having a cooler and a blower, and the cooling chamber A first cold air passageway in which the cold air generated is passed between a pair of opposing walls forming the first storage chamber, a second cold air passageway in which the cold air flows along the opening on one side, and a second cold air passageway in the second storage chamber. A low-temperature refrigerator characterized in that the cold air is separated into a third cold air flow path. 2. The flow rate of cold air flowing through each cold air flow path is set to the first cold air flow path>
2. The low-temperature refrigerator according to claim 1, wherein the cold air is separated into a relationship expressed by the following relationship: second cold air flow path>third cold air flow path.