JPH0452481A - Show case - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The opening of a case in which products are displayed and stored and whose outer peripheral surface is open is double covered with an air curtain and a door on the outside thereof,
It also faces a showcase in which the flow rate of the circulating flow of air, which forms an air curtain and is circulated within the case while being cooled by a refrigeration device and is blown out from the outlet, can be adjusted.

[Conventional technology]

A showcase that is equipped with a case with an open outer circumferential surface and that displays and stores products for sale inside the case is designed to ensure the freshness of products that are displayed and stored inside the case, such as frozen foods that are sold after being frozen. In order to maintain the temperature, a frozen type is used in which the inside of the case is frozen to below -15°C using a freezing device. The opening on the outer surface of the case of such a frozen showcase is covered with a door, and even if the door is opened when storing products or when customers take out products, the temperature rise and freezing of the products displayed inside the case will be prevented. This air curtain is covered with an air curtain that prevents outside air from entering the case so as not to reduce efficiency. It is formed by a circulating flow of air that is circulated while being cooled by an installed refrigeration device and blown out from an outlet formed along the edge of the frontage of the case at the end of the ventilation path. On the other hand, the faster the flow rate of the air circulation that forms the air curtain, the less the air curtain will be disturbed by outside air when the door is opened, and the less outside air will pass through the opening and enter the case. When the air curtain is closed, the heat l taken from the outside air by the air curtain increases through this door.One of the conventional examples of this type of showcase is shown in Figs. 4 and 5. Figure 5 is an enlarged view of the front side of the case shown in Figure 4 with the door covering the front side open, and the right side of the figure is the front side. .

In FIGS. 4 and 5, 1 is a case with an opening 2 that opens at the front, and this case 1 includes a box-shaped case body 3 with a C-shaped cross section and an opening at the front; It is composed of partition walls 4 having a C-shaped side cross section and an open front, which are formed inside the case body 3 at intervals along the inner circumferential surface. The space defined by this @ wall 4 and the case body 3 forms a ventilation passage 5, and this ventilation passage 5
An air outlet 6 and a suction lower are formed at both ends of the opening 2 along the upper and lower edges of the opening 2, the opening surfaces of which face each other vertically. Bukkake 4's box office O1 again! The I wall supports the rear ends of multiple [318] arranged vertically in a well-ventilated mesh on which products are placed, and the opening 2 of the case 1 is covered with a transparent glass door 9. A refrigeration system [10 and a blower 11 are disposed in the ventilation passage 5 at the bottom of the refrigerator 1.

The air inside the case 1 that is always blown at the same volume by the blower 11 is cooled by the refrigeration device 10 and becomes cold air, which passes through the ventilation path 5 and blows out from the outlet 6 at a constant speed to cover the opening 2 of the case 1. A curtain 12 is formed, and the air is sucked into the ventilation wr5 again from the suction lower to form a circulating flow 13. A part of this circulation flow 13 flows inside the case 1 and tlJ
In addition to cooling the products on display s, the air curtain 12 prevents outside air from entering the case 1 when the door 9 is opened, and prevents the temperature of the products displayed inside the case 1 from increasing due to the entry of outside air. Frost formation on the inside of case 1 due to moisture in the outside air.

This prevents a decrease in refrigeration efficiency.

[Problem to be solved by the invention]

By the way, in such a showcase, the same air is always blown by the blower 11 and passes through the ventilation path 5 to the refrigeration equipment ff1l.
The circulating flow 13 of air that circulates while being cooled by o and forms the air curtain 12 is always blown out from the air outlet 6 at a constant speed regardless of whether the door 9 is opened or closed. The circulating flow 13 passes through the opening 2 by reducing the degree to which the air curtain 12 is disturbed by outside air when the door 9 is opened, reducing the amount of outside air entering the case 1, and at the same time closing the door 9. In this case, it is not possible to reduce the heat I taken by the air curtain 12 from the outside air through the door 9. In other words, for example, if the flow velocity of the circulating flow 13 forming the air curtain 12 is kept constant at high speed, the case H9 is opened. Although the amount of outside air entering the case 1 can be reduced, there is a problem in that when the door 9JR is locked, the amount of heat taken by the air curtain 12 from the outside air through the door 9 increases and the cooling rate inside the case 1 decreases.

This invention reduces the amount of outside air and g that enters the case when the door is opened.
It is an object of the present invention to provide a showcase capable of preventing a reduction in refrigeration efficiency by reducing the amount of air taken from outside air by an air curtain through a door during rRm.

[Means to solve the problem]

In order to solve the above problems, in this invention, along the inner circumferential surface of a case in which products are displayed and stored and whose outer circumferential surface is open,
Further, an air outlet and a suction port, which are opened in the case along the openings 1iIyk1 facing each other and whose opening surfaces face each other, are arranged in the ventilation path through a ventilation path formed at both ends. In the showcase in which the opening of the case is double covered by an air curtain formed by a circulating flow of air circulating inside the case while being cooled by a refrigeration device installed therein, and an outer door of the air curtain, a width adjustment member supported on the peripheral edge of the air outlet so as to be movable in the direction in conjunction with opening and closing of the door, which adjusts the opening width of the air outlet in a direction perpendicular to the opening surface of the air outlet; do.

[Effect]

This invention provides an opening opening to the outer circumferential surface of the case, which is provided at one end of a ventilation passage formed along the inner circumferential surface of a case that is double covered with an air curtain and a door; The air outlet is perpendicular to the opening surface of the opening, which opens into the case, passes through the ventilation path, circulates inside the case, and blows out a circulating flow that forms an air curtain while being cooled by the refrigeration device. Since the width adjustment member is supported on the peripheral edge of the air outlet and is movable in the direction in conjunction with the closing of the door, the width adjustment member adjusts the opening width in the direction perpendicular to the opening surface of the case. By widening the opening width of the air outlet by adjusting the position of the width adjustment member when the door is closed, and narrowing it by moving the adjustment member in conjunction with the door when the door is open, the flow velocity of the circulating flow blown out from the air outlet can be adjusted. can be made slower when the door closes and faster when the door opens. As a result, when the door is closed, the air curtain formed by the low-speed circulating flow steals P! from outside air through the door. ! , i are significantly reduced compared to the conventional case, and the intrusion of outside air into the case when the door is opened is blocked by the air curtain formed by the high-speed circulation flow, which is significantly reduced compared to the conventional case.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3. Fig. 1 is a left side vertical sectional view of the main part showing the internal structure of the showcase of the embodiment of the present invention, and Fig. 2 is a left side longitudinal sectional view of the main part with the door covering the front opening of the case shown in Fig. 1 open. , FIG. 3 is a reduced view showing the entire left side longitudinal section of the showcase shown in FIG. 1, with the right side of the figure being the front side in both cases.

Components common or identical to those in FIGS. 4 and 5 are designated by the same reference numerals.

In Figures 1 to 3, 1 is a case having an opening 2 that opens on the front, and this case 1 is referred to as a case book t#.
3 and a partition wall 4.

A space partitioned by the case body 3 and the partition wall 4 forms a ventilation passage 5, and openings 2 are provided at both ends of the ventilation passage 5.
The air outlet 6 and the suction lower are formed along the upper and lower edges of the air outlet 6, the opening surfaces of which face each other vertically. A support 14 having a U-shaped front vertical section is fixed to the lower surface of the upper front end of the partition wall 4 that forms the peripheral edge on the depth side of the Suita mouth 6. Width adjustment member 1 with an N-shaped side cross section, each of which is bent in the upside down direction.
5 is clamped so that it can be moved back and forth. This width adjustment member 15
is pulled rearward by a tension coil spring 16 whose rear end and front end are fixed to the front ends of the width adjusting member 15 and the partition wall 4, respectively. Further, the rear end of [8] is supported on the depth side wall surface of the partition wall 4, and the opening 2 of the case 1 is covered with a door 9. A refrigeration system [10] and a blower 11 are connected to each other via a penetrating and flexible wire 17, and are arranged in a ventilation passage 5 in the lower part of the case 1. This air blower 11
The air inside the case 1, which is always blown in the same manner by the 1111, is cooled by the refrigeration device tlo, becomes cold air, passes through the ventilation path 5, and when the door 9 is closed, the width adjustment member 15 is pulled by the tension coil spring 16 and retreats. Air is blown out at low speed from the Suita exit 6, which is located at the end and has a wider width in the front and back direction perpendicular to the opening surface of the case 1 than before, and the wire 17 is placed at the door 9. The air curtain 12 is pulled forward against the tensile force of the tension coil spring 16 to form an air curtain 12 that covers the air outlet 2 at high speed from the air outlet 6 whose width in the front and rear direction is narrower than before.

The air forming this air curtain 12 is sucked into the ventilation passage 5 again from the suction lower to form a circulating flow 13, and a part of this circulating flow 13 flows inside the case 1 to cool the displayed products on the shelf 8. do.

In the above-mentioned configuration, when the door 9 is closed, the air curtain 12 formed by the circulating flow 13 blowing out at low speed from the air outlet 6 whose width is widened in the front and rear direction takes away the amount of heat from the outside air through the door 9 as described above. This is significantly less than the conventional example. Door 9 again
When the case 1 is opened, the amount of outside air that enters into the case 1 is significantly reduced as it is blocked by the air curtain 12 formed by the circulating flow 13 blown out at high speed from the air outlet 6 whose width in the front and back direction is narrowed.

Therefore, when door 9 is closed, '! It is possible to reduce both the amount of heat of the outside air conducted into the case 1 through the if9 and the amount of outside air that enters the case 1 when the door 9 is left open. This prevents the product from adhering to the inner surface of the case 1, thereby reliably preventing a decrease in the commercial value and refrigeration efficiency of the displayed products.

Note that this invention can be constructed at a much lower cost than the case where the wind speed of the circulating flow 13 blown out from the air outlet 6 is controlled by changing the rotational speed of the blower 11.

〔Effect of the invention〕

According to this invention, an opening opening to the outer circumferential surface is provided at one end of a ventilation passage formed along the inner circumferential surface of the case that is double covered with an air curtain and a door, and one of the openings of the case is provided. To the opening surface of the opening of an air outlet that closes inside the case along the edge, passes through the ventilation path, is cooled by the refrigeration device, circulates inside the case, and is blown out to form an air curtain. A curtain adjustment member is provided that adjusts the opening width in the vertical direction and is supported on the peripheral edge of the air outlet so as to be movable in the direction in conjunction with the opening of the field.
When the door is opened, outside air is blocked and prevented from entering the case by an air curtain formed by a high-speed circulating flow, which is significantly reduced compared to the conventional method. As a result, the amount of heat that the curtain takes from the outside air through the door is significantly reduced, and as a result, the heat of the outside air conducted into the case through the door when the door is locked, or the outside air that enters the case when the door is opened, can reduce the amount of heat displayed inside the case. This has the advantage that products do not lose their value due to temperature rise or frost buildup, and it is possible to construct a showcase at a low cost that maintains high cooling efficiency even if the door is opened and closed frequently. can get.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of the main part on the left side showing the inner M structure of a showcase according to an embodiment of the present invention, and Fig. 2 is a longitudinal sectional view of the main part on the left side of the case with the door covering the front side of the case shown in Fig. 1 open. [!I Longitudinal sectional view, FIG. 3 is a reduced view showing the entire left vertical section of the showcase in FIG. 1, FIG. The figure is an enlarged view of the case 4r5A with the door covering the front side open.

Claims (1)

[Claims] 1) An opening is opened into the case along the inner peripheral surface of the case in which the product is displayed and stored and the outer peripheral surface is open, and along the opposite edges of the opening of the case, with the opening surfaces facing each other. An air curtain formed by a circulating flow of air circulating inside the case while being cooled by a refrigeration device disposed in the ventilation passage through a ventilation passage having an air outlet and a suction opening formed at both ends; In a showcase in which the opening of the case is double covered by an outer door of an air curtain, the opening width of the air outlet in a direction perpendicular to the opening surface of the case is adjusted, and the opening and closing of the door is interlocked with the opening and closing of the door. A showcase comprising a width adjusting member supported on a peripheral edge of the air outlet so as to be movable in a direction.