JPS6039734Y2 - Frozen/refrigerated open showcase - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a frozen/refrigerated open showcase, and more particularly to a ventilation passage structure for uniformizing the velocity distribution in the longitudinal direction of a cold air curtain formed to cover the front opening of the case.

As shown in FIG. 1, this type of showcase is constructed by assembling an inner box 3 at a predetermined interval within an exterior 2 made of a heat insulator with a substantially C-shaped cross section, and extending the inner box 3 from the bottom to the back within this interval. A blower 4 and a cooling refrigerant evaporator 5 are installed in this ventilation path, and cool air is blown out from the outlet 6 at the front end of the ceiling, and this cold air is sent to the front end of the bottom. By sucking in from the suction lower and performing circulation, the inside of the case 1 is cooled while the front opening of the case 1 is covered with a cold air curtain.

8 is a side plate. Incidentally, for the purpose of improving the wind velocity distribution in the longitudinal direction of the cold air curtain, an air volume adjusting plate having a large number of small holes or an air flow guide plate for correcting the air flow may be provided in the ceiling ventilation passage.

However, even if such a means is not available, if the blower 4 is placed at the corner from the bottom ventilation passage to the back ventilation passage, the suction loss will be small since it is close to the suction lower, and the air blower will be approximately 90'
It has the advantage of reducing static wind pressure loss due to bending.
In addition, if the evaporator 5 is arranged in the back ventilation passage on the leeward side of the blower 4, a rectification effect in the longitudinal direction can be obtained when the cold air passes through the evaporator 5, and the wind speed distribution in the longitudinal direction of the cold air curtain can be made uniform. Ancillary effects can be obtained.

However, on the other hand, if the blower 4 is located directly below the evaporator 5, when the frost that has formed on the evaporator 5 is removed by heating, dissolved water will wet the blower 4, causing a drop in insulation and causing damage to the rotating blades. When the frost hits the blower 4, it makes an abnormal noise, and in some cases, the frost lumps may directly hit the blower 4.

Furthermore, in the case of refrigeration operation, there are also drawbacks such as malfunction of the blower 4 due to freezing of attached moisture, and fallen frost lumps accumulate in the bottom ventilation passage and obstruct ventilation.

The present invention is intended to provide an open freezer/refrigerator showcase in which the above-described drawbacks are eliminated while the advantages of the blower 4 and evaporator 5 are maintained in the same position as described above.

The present invention is characterized in that a partition plate with a special shape is provided in the ventilation path between the blower and the evaporator to improve the wind speed distribution of the cold air curtain.Examples of the present invention will be described below. do.

FIG. 2 is a schematic cross-sectional view of the freezing/refrigerating showcase according to the present invention, showing the blower 4 disposed at the corner from the bottom ventilation passage to the back ventilation passage, and the evaporator 5 disposed in the back ventilation passage. A partition plate 9 is disposed in the ventilation path between the two.

FIG. 3 shows an example of this partition plate 9 in a perspective view.

This partition plate 9 is made according to the cross-sectional shape of the ventilation passage,
Flanges 91 and 92 formed on the front and rear edges are respectively attached to the inner box 3 or the outer box 2 by screws or the like.

A plurality of notches 93 for rectification are provided at intervals in the length direction on the rear edge side, and a flange 9 is provided at the edge of each of the notches 93 that extends upward with a slight gap on the rear edge side.
4 is formed.

When installed, the front edge side is inclined so that it is higher than the rear edge side.

By arranging such a partition plate 9, the air from the blower 4 is rectified by passing through the notch 93, and is further rectified when passing through the evaporator 5, resulting in a velocity distribution in the longitudinal direction of the cold air curtain. is made uniform.

In addition, since it is installed at an angle, water droplets that fall from the evaporator 5 during heating and defrosting are collected on the outer box 2 side by the flange 94, and are passed through the gap between the outer box 2 and the flange 94 to the outer box wall surface. This prevents moisture from adhering to the blower 4 and frost blocks from falling.

FIG. 4 shows another example of the partition plate 9.

In this example, the flow is rectified by a plurality of holes 95 provided at intervals along the center line in the longitudinal direction of the partition plate 9, and heated by a plurality of notches 93 provided at intervals in the longitudinal direction at the rear edge. Water during defrosting is made to flow down along the wall surface of the outer box 2.

Of course, a flange 94 is provided at the edge of the hole 95 to prevent water from flowing into it.

This partition plate 9 is also attached so that the front edge side is higher than the rear edge side as described above, but as shown in FIG. This prevents the accumulation of frost particles that have not completely melted.

This heating means 10 uses a similar electric heater when heating and defrosting is performed by energizing a rod-shaped electric heater disposed on the windward side of the evaporator 5, and when defrosting with hot gas, a similar electric heater is used. Just pass it through the refrigerant supply pipe.

As is clear from the above explanation, in this invention, the partition plate not only acts to rectify the ventilation, but also prevents water and frost lumps generated when heating and removing frost attached to the evaporator from the bottom to the back. It is possible to prevent the cold air curtain from falling directly to the corner, thereby taking advantage of the advantage of arranging the blower at the corner where the ventilation loss is the least, and making it possible to improve the uniformity of the wind speed distribution of the cold air curtain.

Note that the present invention is not limited to the embodiments, and various modifications can be made.

For example, the size and spacing of the notches or holes provided in the partition plate 9 are set to optimal values to obtain a good velocity distribution in the cold air curtain, and the type of showcase is also a single layer as shown in the figure. It is not limited to flow style.

[Brief explanation of the drawing]

Fig. 1 shows a cross-sectional view of an example of a conventional frozen/refrigerated open showcase, and Fig. 2 shows a cross-sectional view of an embodiment of the present invention.
FIGS. 3 and 4 are perspective views of first and second examples of partition plates used in the present invention, respectively, and FIG. 5 is a cross-sectional view of the mounting structure of the partition plates. In the figure, 1 is a frozen/refrigerated open showcase, 2 is an outer box, 3 is an inner box, 4 is a blower, 5 is a refrigerant evaporator, 9 is a partition plate, and 10 is a heating means.

Claims (1)

[Scope of utility model registration request] In an open freezer/refrigeration showcase in which a refrigerant evaporator is arranged at the back of the ventilation path extending from the bottom of the case to the back and the ceiling, and a blower is arranged on the windward side, there is a gap between the blower and the refrigerant evaporator. A partition plate is arranged in the ventilation passage so that its front edge is higher than its rear edge, and the partition plate has a plurality of holes or notches cut out from the rear edge side at intervals in the longitudinal direction. A freezing/refrigerating open showcase characterized in that at least one of the notches is provided, and a flange extending upward is formed at the edge of the hole or notch.