JPH1019446A - Showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To standardize components of a showcase per specification with regards to a fan plenum which is incorporated into the base of a case main body. SOLUTION: In this system where a cooled air circulation internal fan 6 is incorporated into a fan plenum 7 laid out on the base of a showcase main body with regards to a cooled air circulation showcase which keeps cold insulation by feeding the cooled air circulatingly into the interior of the showcase, a square-shaped fan hole 7d is bored in a plenum cover 7a of the plenum 7 per specified pitch along the longitudinal direction while a blind cover plate 11, which blocks a fan unit 10 mounted with a fan on a fan mounting plate 9 to comply with the specification of the showcase or the window hole, is selectively mounted per window hole fan unit 10 provided with a fan. An air inlet opening 9a, which forms a shroud 9b in the center of the plate surface is bored in the fan mounting plate 9 and the fan is mounted on the rear surface side by means of a fitment. The outer peripheral edge area of the mounting plate is placed on the window hole peripheral edge of the plenum cover 7a so that it may be fixed with a screw.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cool air circulation type showcase for a multi-stage open showcase and the like, and more particularly to a fan unit in a refrigerator incorporated in a showcase and a plenum structure thereof.

[0002]

2. Description of the Related Art First, the configuration of a conventional showcase is shown in FIG.
As shown in FIG. In the drawing, 1 is an outer box of a front open case main body, 2 is an inner box, 3 is a product display shelf, 4 is a cooling air circulation duct surrounding the inner box 2 and defined between the outer box 1 and 5 is a cooling air duct. A refrigerator (evaporator of a refrigerator), 6 is a fan in the refrigerator.
In the cold-holding operation in this configuration, the cool air cooled by the heat exchange with the cooler 5 flows through the circulation duct 4 as shown by the arrow, and a cool air curtain is blown out on the front open surface of the case body to form the product display shelf 3. (Not shown) is kept cool.

Here, a fan plenum 7 is provided on the bottom side of the outer case of the case body so as to cross the cool air circulation duct 4 over the entire length of the case, as shown in FIGS. 5 (a) and 5 (b). A plurality of internal fans 6 are distributed and arranged on a plenum cover 7a of the fan plenum 7. That is, the plenum cover 7a is provided with intake holes 7b corresponding to the number of the fans 6 along the longitudinal direction thereof.
The internal fan 6 composed of a and the fan blades 6b is screwed and fixed to a peripheral portion of the intake hole 7b via a frame-shaped fan mounting bracket 8. The intake hole 7b is a circular hole corresponding to the outer diameter of the fan blade 6b.
Shroud 7c having a gentle arc surface on the periphery of b
Is applied to form burring (drawing) processing.

[0004]

As described above, the intake port 7 is provided on the plenum cover 7a of the fan plenum 7.
The conventional configuration in which the b is opened and the internal fan 6 is directly installed has the following problems in workability of the fan plenum and other aspects. 1) In order to dispersely open the intake ports 7b of the internal fan 6 at a plurality of locations with respect to the fan plenum 7 of a long member, in addition to punching press work, a shroud is formed on the periphery of the intake port. However, since the fan plenum itself is a long member that is several meters long, it is difficult to handle and process parts, and a large dedicated processing machine is required for drilling and burring. Become.

[0005] 2) The number of in-compartment fans 6 installed in the fan plenum 7 varies depending on the cooling temperature of the showcase and the like. The number of installed fans is different. For this reason, conventionally, it is necessary to design and manufacture a dedicated fan plenum in which the number of intake ports opening to the plenum cover and the opening position are changed according to the specifications of the showcase, which increases the manufacturing cost and the number of types. Parts management also becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has not only facilitated manufacturing and processing but also has standardized parts in regard to a showcase according to specifications with respect to a fan plenum incorporated in a case body of a showcase. It is an object of the present invention to provide an improved showcase.

[0007]

According to the present invention, there is provided a show having a configuration in which an internal fan is incorporated in a fan plenum arranged across a circulation ventilation duct on the bottom side of a case body. In the case, a fan unit in which a fan motor is attached to a mounting plate for each of the window holes, and a fan motor is attached to the plenum cover of the fan plenum at predetermined pitch intervals along a longitudinal direction thereof. A blind cover plate that closes the hole is configured to be selectively attached in accordance with the specification of the showcase. Specifically, the fan plenum and the fan unit can be configured in the following forms.

[0008] 1) In the mounting plate of the fan unit, a circular hole corresponding to the outer diameter of the fan blade is formed to open an intake port having a shroud formed at a peripheral portion of the hole, and a mounting bracket is provided on the back side of the mounting plate. And install the fan motor. 2) The fan window hole opened in the plenum cover of the fan plenum is used as a square hole, and the peripheral portion of the mounting plate of the fan unit or the blind cover plate is overlapped on the peripheral edge and screwed.

According to the above construction, the fan plenum itself, which is a long member, is formed by simply punching a simple square hole at a constant pitch, but does not require burring.
Can be easily processed. In addition, as a common part, the required number of fans are distributed according to the specifications of the showcase and distributed in the window holes, and the remaining unused window holes are blinded. By closing with a lid plate, it becomes possible to standardize the fan plenum for showcases of various specifications.

The fan mounting plate is a shorter plate than the fan plenum and is easier to handle. Processing of a round hole serving as a fan intake port and burring forming a shroud at the intake port also require a large dedicated processing machine. And can be processed

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings of the embodiment, the same members corresponding to those in FIG. 5 are denoted by the same reference numerals. That is, in the configuration of the illustrated embodiment, a fan having a square hole is provided at a constant pitch interval on the plenum cover 7a along the longitudinal direction of the long fan plenum 7 manufactured according to the length of the case body. The window holes 7d (three in the illustrated example) are dispersedly opened, and each window hole 7d is adapted to the specifications of the showcase.
For each d, either the fan unit 10 as an assembly of the fan mounting plate 9 and the fan 6 or the blind cover plate 11 for closing the window hole 7d is selectively attached and assembled.

The fan mounting plate 9 of the fan unit 10 is a short flat plate having a rectangular outer shape, and a circular intake port 9a corresponding to the outer diameter of the fan blade 6b is provided at the center of the plate surface. Are formed, and burring is performed on the periphery of the hole to form an arc-shaped shroud 9b. The fan motor 6a is screwed and fixed to the rear surface of the mounting plate 9 via a frame-shaped mounting member 8.

When the fan unit 10 is mounted on the fan plenum 7, the window hole 7 opened on the plenum side is used.
The peripheral edge of the fan mounting plate 9 is superimposed on the peripheral edge of d, and tightened with the set screw 12 in this state. In addition, blind cover plate 11
The same applies to the case of mounting. When the fan plenum 7 configured as described above is incorporated into a showcase as a standard part, a required number of fan units 10 are mounted in the fan window holes 7d according to the specifications of the showcase and are not used. The remaining window holes are assumed to be closed by covering the blind cover plate 11, and FIGS. 2 and 3 show examples of actual use. That is, in FIG. 2, the fan unit 10 is mounted only on the window hole opened in the center among the three window holes opened in the fan plenum 7, and the left and right window holes are closed by blind cover plates 11. On the other hand, in FIG. 3, the fan unit 10 is mounted in the left and right window holes, and the remaining central window hole is closed by the blind cover plate 11. When three fan units 10 are installed according to the specification temperature of the showcase, one fan unit 10 is provided in each of the three window holes, and the blind cover plate 11 is provided.
Do not use

[0014]

As described above, according to the configuration of the present invention, the following effects can be obtained in terms of manufacturing and parts management. 1) For the fan plenum itself, which is a long member to be incorporated into the case body of the showcase, it is sufficient to press a simple square hole at regular intervals on the plenum cover. Since burring for forming a shroud is not required, fabrication and processing are easy.

2) A required number of fans are distributed according to the specifications of the showcase and distributed in the window holes, and the remaining unused windows are used as common parts, with the fan plenum having fan window holes opened at regular pitch intervals as common parts. By closing the hole with a blind cover plate, the fan plenum can be standardized for showcases of various specifications, contributing to cost reduction. 3) The fan mounting plate of the fan unit is a shorter plate than the fan plenum and is easy to handle. Processing of a round hole to be a fan intake port and burring to form a shroud in the intake port also require a large dedicated processing machine. Can be easily processed

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a fan plenum according to an embodiment of the present invention incorporated in a showcase, (a) is an exploded perspective view,
(b) is a side view of the fan unit installed in the fan plenum.

FIG. 2 is an assembly diagram when one fan unit is installed in the fan plenum of FIG. 1;

FIG. 3 is an assembly diagram when two fan units are installed in the fan plenum of FIG. 1;

FIG. 4 is a configuration diagram of a multi-stage open showcase to which the present invention is applied;

FIG. 5 is a configuration diagram of a conventional fan plenum.
(a) is a partial perspective view, and (b) is a side view of the fan unit mounted on the fan plenum.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer box of case main body 2 Inner box 3 Commodity display shelf 4 Cool air circulation duct 5 Cooler 6 Fan 6a Fan motor 6b Fan blade 7 Fan plenum 7a Plenum cover 7d Fan window 8 Fan mounting bracket 9 Fan mounting plate 9a Inlet 9b Shroud 10 Fan unit 11 Blind cover plate 12 Set screw

Claims (3)

[Claims] 1. A cool air circulation system in which a cooler and a fan are installed in a circulation ventilation duct defined between an outer case and an inner case of a case body, and cool air is circulated and blown into the refrigerator to keep the product cool. In the showcase, in which the fan is incorporated in a fan plenum arranged so as to cross the circulation ventilation duct on the bottom side of the case body, a plenum cover of the fan plenum is provided at predetermined pitch intervals along a longitudinal direction thereof. While opening window holes for fans, for each window hole,
A showcase characterized in that a fan unit having a fan motor mounted on a mounting plate or a blind cover plate for closing a window hole is selectively mounted in accordance with the specifications of the showcase. 2. A showcase as set forth in claim 1, wherein the mounting plate of the fan unit has a circular hole corresponding to the outer diameter of the fan blades, and an inlet having a shroud formed around the hole is opened. A showcase, wherein a fan motor is mounted on the back side of the plate via a mounting bracket. 3. The showcase according to claim 1, wherein a fan window hole opened in a plenum cover of the fan plenum is a square hole, and a peripheral portion of a mounting plate of a fan unit or a blind cover plate is overlapped on the peripheral edge. Showcase characterized by screws.