JPS624855Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] So-called open type refrigeration that has openings at appropriate locations, circulates air using a blower fan, and forms an air curtain at the openings to keep the interior cool. The present invention relates to a flow rate regulating device in a show case.

[Conventional technology]

When displaying products using a refrigerated case like the one above, make sure to keep the openings open while the store is closed so as not to hinder sales, and after the store is closed or on holidays, warm outside air should be allowed to enter the case. In order to prevent the inflow and reduce the refrigeration load,
The opening is often closed with a film-like night cover.

When the night cover is closed, most of the outside air is blocked from entering, so even if the flow rate of circulating air is reduced, the inside of the case is maintained at the desired temperature, which is economical.

Focusing on this point, there is a known device that reduces the power consumption of the ventilation fan by reducing the flow rate of air circulating inside the case when the night cover is used (for example, Japanese Patent Laid-Open No. 56-85679 (Refer to Publication No. 45-1501).

[Problem that the invention attempts to solve]

In the conventional device described above, it is somewhat troublesome to hold the night cover in place when it is closed, and the electric circuit mechanism associated therewith is complicated.

[Means for solving problems]

The present invention solves the above problems by using magnets, and includes a blower fan 17 for forming an air curtain 9 of cooling air in an opening 1a provided at a suitable location of the outer box 1, and a A protective air curtain 1 made of uncooled air is placed in front of the curtain 9.
1, and a night cover 15 having a conductive magnet 14 fixed at a proper position is attached to one side edge of the opening 1a, and a night cover 15 is attached to the other side of the opening 1a. A magnet 18 capable of attracting the conductive magnet 14 and circuit terminals 20, 20 that reduce the functions of the blower fans 7, 10 when electrically connected are arranged on the edge of the night cover 15. When the conductive magnet 1 is closed, the conductive magnet 1
No. 4 is characterized in that it is attracted to the magnet 18 and comes into contact with the terminals 20, 20, thereby making the circuit conductive.

〔Example〕

In the figure, reference numeral 1 denotes an outer box of a refrigerating case with an opening 1a at the front, and inside thereof a display shelf 3 having a required number of shelf boards 2 and opening at the front is arranged.

Reference numeral 4 denotes a partition plate disposed between the inner surface of the outer box 1 and the outer surface of the display shelf 3. Between the partition plate 4 and the outer box 1, an outer flow path 5 for non-cooled air is provided. Furthermore, inner flow paths 6 for cooling air are formed between the partition plates 4 and the display shelves 3, respectively.

Reference numeral 7 denotes a blower fan installed between the lower surface of the display shelf 3 and the partition plate 4, and the fan 7 directs the cooling air through the inner flow path 6 and through the evaporator 8 as shown by the solid arrow. The cooling air is circulated to form an air curtain 9 of cooling air in the opening 1a.

Reference numeral 10 denotes a blower fan installed between the partition plate 4 and the outer box 1 slightly in front of the blower fan 7, and the fan 10 circulates the non-cooled air through the outer flow path 5 as shown by the dotted arrow. A protective air curtain 11 is formed in front of the air curtain 9.

Reference numeral 12 denotes a storage section for a night cover formed at the front end of the upper part of the outer box 1, and a rotating shaft 13 provided in the storage section 12 and facing in the left-right direction has a film shape;
A night cover 15 having a conductive magnet 14 attached thereto is wound around the free end.

Reference numeral 16 denotes a box-shaped engagement portion fixed to the front end of the lower part of the outer box 1, and a recessed hole 1 is provided in the front surface of the engagement portion 16.
7 is cut out.

A pair of upper and lower magnets 1 are provided on the rear surface of the rear wall of the recessed hole 17.
8 is attached, and a through hole 19 facing in the left-right direction is bored in the center of the rear wall.

Reference numeral 20 denotes a pair of terminals disposed slightly in front of the through hole 19, which are connected to both the blower fans 7 and 10 via conducting wires 21, 21 (not shown), and are connected to both the conducting wires 2
By connecting 1 and 21, the blower fan 10
The fan 7 is stopped or decelerated, and the rotational speed of the blower fan 7 is also decelerated.

When storing the night cover 15 shown in FIG.
The cooling air passing through the inner channel 6 flows at a relatively high speed over the shelf board 2 to cool the products, and the non-cooling air passing through the outer channel 5 flows through the opening 1a into the protective air curtain 11. This prevents the inflow of warm air from outside and maintains the inside of the refrigerating case at a desired cooling temperature.

Figure 2 shows opening 1a after closing or on holidays.
This figure shows the main part of the present embodiment when the opening 1a is closed with a night cover 15 when there is no need to take out the product.

When the night cover 15 stored in the storage part 12 is pulled downward and brought close to the front surface of the engaging part 16 (imaginary line in FIG. 2), the magnets 14 and 18 are attracted to each other, and the magnet 14 is fitted into the recessed hole 17. and terminal 20
The conductive wires 21, 21 are electrically connected to each other.

Due to this conduction, the rotation of the blower fan 10 is stopped or decelerated, the rotational speed of the blower fan 7 is reduced, and almost no non-refrigerant air flows through the outer flow path 5, and the inner flow path 6
The flow rate of cooling air flowing through the area decreases.

In this case, the opening 1a is completely closed by the night cover 15, and outside air does not flow in.
The outer protective air curtain 11 may be reduced or
Otherwise, it will be significantly weaker, but there will be no problem.

Further, although the flow rate of the circulating cooling air is reduced, there is almost no temperature rise due to the inflow of outside air, so the cooling temperature is maintained at a desired level.

Thus, according to the present invention, the night cover 1
By closing the opening 1a with the fan 5, the blower fans 7, 1 can be closed without increasing the temperature inside the case.
0 can be stopped or decelerated,
It becomes possible to significantly reduce electric power consumption.

Furthermore, the magnet 14 automatically closes the night cover 15 at a predetermined position, and the terminals 20, 20 are automatically electrically connected, which is advantageous.

Note that instead of reducing the rotational speed of the blower fans 7 and 10, a plurality of these may be provided and some of them may be stopped.

[Brief explanation of the drawing]

The drawing shows one embodiment of the device of the present invention.
FIG. 1 is a longitudinal side view when the night cover is stored, and FIG. 2 is an enlarged sectional view of the main parts when the night cover is in use. 1...Outer box, 1a...Opening, 2...Shelf board, 3
...Display shelf, 4...Dividing board, 5...Outside flow path, 6
...Inner flow path, 7...Blower fan, 8...Evaporator, 9...Air curtain, 10...Blower fan,
11...Protective air curtain, 12...Storage section,
13... Rotating shaft, 14... Magnet, 15... Night cover, 16... Engaging portion, 17... Recessed hole, 18...
...Magnet, 19...Through hole, 20...Terminal, 21...
Conductor.

Claims (1)

[Scope of utility model registration request] A blower fan 17 for forming an air curtain 9 of cooling air in an opening 1a provided at a proper location of the outer box 1
A blower fan 10 for forming a protective air curtain 11 made of uncooled air is provided on the front surface of the air curtain 9, and a conductive magnet 14 is placed at a suitable location on one side edge of the opening 1a. A night cover 15 is attached to which the opening 1a is fixed.
On the other side edge, a magnet 18 that can be attracted to the conductive magnet 14 and both the blower fans 7, 10 when electrically connected
When the terminals 20, 20 of the circuit designed to reduce the function of the circuit are arranged and the night cover 15 is closed, the conductive magnet 14 is attracted to the magnet 18, and the terminals 20, 20 1. A flow rate regulating device in a refrigerated storage case, characterized in that the flow rate adjusting device is configured to contact the circuit and conduct the circuit.