JPH0343580Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a refrigerated storage case that attempts to cool the storage compartment by forced circulation of cold air.

(b) Prior art Japanese Utility Model Publication No. 51-24229 (Japanese Classification 101J74) states, ``A blower outlet is formed at the upper end of a mirror body that is tilted forward upwards at the back of the refrigerator compartment so that the cold air blowing direction coincides with the mirror surface. The structure of the "Open Shower Case with Forced Cold Air Circulation," which was characterized by
Publication No. 1648 (Japanese Classification 70B41) describes ``a refrigerating case formed by an insulating box and having an open surface for taking in and out products, an air passage formed by the insulating box and an inner wall and covering the outer periphery of the case; A fan that circulates cooling air installed in
A mirror provided on the inner wall, an air outlet and an air inlet forming an air curtain on the open surface of the show case, and a hole bored in the inner wall near the air outlet and in front of the mirror along the fixed edge of the mirror. a bypass hole for bypassing the provided cooling air; and an end of a guide section provided along the bypass hole for causing the bypass cooling air to flow over the mirror surface from a side closer to the air curtain to a side farther from the air curtain. The structure of a "refrigeration case" characterized by the following is shown.

In both of these conventional technologies, the mirror is supported tilted backwards, and cool air is flowed from the upper front end of the mirror toward the rear end to prevent the mirror surface from fogging. The speed of the cold air flowing along the mirror decreases as it moves toward the lower end of the mirror due to the viscous resistance of the mirror surface, and is forced toward the suction port at the lower end of the opening.
As the pressure in the lower space of the refrigerator compartment, which is opposite to the downstream region of the air curtain where the speed is slower, is lowered, the temperature in the cold air passage and refrigerator compartment gradually increases, resulting in higher temperatures. In particular, the cooling effect in the lower space of the refrigerator compartment was getting worse.

(c) Purpose of the invention The purpose of this invention is to solve the drawbacks of the prior art.

(d) Structure of the invention The invention consists of a storage room that is equipped with multiple shelves and is cooled by a cold air curtain formed in the front opening, and a cooling system that forms the air curtain and is a source of forcedly circulated cold air. In a refrigerated case in which the container and the blower are arranged in the bottom area of the cold air passage,
A vertical mirror is disposed over substantially the entire rear surface of the storage chamber, and between the lower edge of the mirror and the rear edge of the bottom plate of the storage chamber, the storage chamber facing the downstream area of the air curtain and the lowest shelf. forming an auxiliary outlet that communicates a lower space of the chamber with a bottom area of the cold air passage;
A protruding side is provided that protrudes upward from the front edge of this auxiliary air outlet toward the lowest shelf, and a portion of the cold air that has just been heat exchanged in the cooler is blown out from the auxiliary air outlet along the mirror surface. This is a refrigerated case with a lower shelf that directs cold air forward.

(E) Embodiment of the invention 1 shown in Figs. 1 and 2 is a refrigerated case with an open front whose main body is composed of a heat insulating wall 3 with an opening 2 for storing and taking out products at the front.
There are multiple shelves 4A in the space surrounded by the heat insulating wall.
-4D, and a cold air passage 6 that surrounds the other side of the storage room except for the front side. 7 is a removable metal bottom plate placed horizontally, 8 is a vertical mirror that forms the back wall of the storage room 5, and 9 is a metal top plate placed tilted backwards. The storage chamber and the cold air passage are defined, and opposing blow-off and suction ports 10 and 11 are also formed along the upper and lower edges of the opening 2. In the bottom area 6A of the cold air passage, that is, in the area directly below the bottom plate 7, a plate-fin type cooler 12, which is a source of forced circulation cold air, and an axial blower 13 supported by a fan case 14 are arranged. , cooler 1
By forcing the cold air heat-exchanged in the air blower 13 to circulate as shown by the arrow, a cold air curtain CA is formed in the opening 2 and the storage chamber 5 is cooled. 15 is the upper space 5A of the storage room 5 as necessary.
An auxiliary mirror 16 disposed in is a holding member that suspends the top plate 9 from the top wall of the heat insulating wall 3 and supports the honeycomb material 17 disposed at the air outlet 10. Reference numeral 18 denotes a machine room formed at the bottom of the main body, in which a refrigerant compressor 19, a condenser 20, and a blower 21, which together with the cooler constitute a cooling cycle, are arranged. It exchanges heat with the condenser 20 and is discharged from the exhaust duct 24 above the main body.

Reference numeral 25 denotes an auxiliary air outlet formed along the front lower edge of the mirror 8, which communicates the lower space 5B of the storage chamber 5 with the bottom area 6A of the cold air passage 6, so that the air immediately after heat exchange with the cooler 12 A part of the cold air is blown upward from the lower front of the mirror 8. Reference numeral 26 denotes a protruding side projecting upward from the front edge of the auxiliary outlet, which is formed at the rear end of the fan case and acts as a wind direction plate for cold air blown out from the auxiliary outlet 25 into the lower space 5B of the storage chamber 5. At the same time, it acts as a guard to prevent the auxiliary air outlet 25 from being blocked by the products placed on the bottom plate 7.

According to such a configuration, the air curtain CA formed in the opening 2 cools the entire storage chamber 5, and at the same time, the air is blown from the auxiliary air outlet 25 upward from the lower front of the mirror 8 to the bottom shelf. 4D prevents the lower front surface of the mirror 8 from fogging due to the cold air directed toward the air curtain CA, and also prevents the lower space 5B of the storage chamber 5 facing the downstream region of the air curtain CA where the speed is slower. The pressure can be increased, and since the cold air blown into the lower space 5B from the auxiliary outlet 25 has just been heat exchanged in the cooler 12, the temperature of the lower space 5B can be maintained at a low temperature. It is possible to enhance the cooling effect of the lower space 5B of the storage chamber 5, and by using the protruding side 26 as a guard, it is possible to prevent the auxiliary outlet 25 from being blocked by the products placed on the bottom plate 7. By making the protruding side 26 act as a wind direction plate for the cold air blown out from the auxiliary air outlet 25, the straightness of the cold air flowing along the mirror surface can be improved, and the anti-fogging effect of the mirror surface can be further improved. .

(f) Effects of the invention A part of the cold air that has just passed through the cooler placed in the bottom area of the cold air passage is blown upward from the lower front of the mirror through the auxiliary air outlet, and this cold air is sent to the shelf. Since it is directed toward the air curtain,
Not only can it prevent the mirror from fogging up, but it can also increase the pressure in the lower space of the storage room, which faces the slower downstream region of the air curtain, and maintain the temperature at a lower temperature. The cooling effect of the mirror can be improved, and the straightness of the cold air flowing along the mirror surface is improved even at the protruding side, thereby improving the anti-fogging effect of the mirror surface and preventing the auxiliary air outlet from being blocked by the product.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the refrigerating case according to the present invention, and FIG. 2 is an enlarged view of FIG. 1A. 2...Opening, 4D...Shelf, 5...Storage room, 5B
... lower space, 6 ... cold air passage, 6A ... bottom area, 8 ... mirror, 12 ... cooler, 13 ... blower, 25 ... auxiliary outlet, CA ... air curtain.

Claims (1)

[Scope of utility model registration request] A storage room equipped with multiple shelves and cooled by a cold air curtain formed in the front opening, and a cooler and a blower that form the air curtain and serve as a source of forced circulation cold air are installed in the bottom area of the cold air passage. In the refrigerated storage case, a vertical mirror is arranged over substantially the entire rear surface of the storage compartment, and between the lower edge of the mirror and the rear edge of the bottom plate of the storage compartment, the downstream area of the air curtain and the lowest stage forming an auxiliary air outlet that communicates the lower space of the storage chamber facing the shelf with the bottom area of the cold air passage, and protruding upward from the front edge of the auxiliary air outlet toward the lowest shelf. A refrigerated case is provided with a protruding side that blows out a portion of the cold air immediately after heat exchange in the cooler along the mirror surface from the auxiliary air outlet, and directs the cold air forward at the lowest shelf.