JP2001099549A - Low-temperature showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive showcase capable of preventing the short cycle of chill by dispensing with a hinge for rotating a fan case in cleaning. SOLUTION: A low-temperature showcase is equipped with a cooler 10 that is placed in a chill passage 7 being formed around a merchandise accommodation chamber 1, and a fan case 3 that supports a blower 2 and is placed in the chill passage. In the cooler 10, a support piece 50 is provided, an engagement part 30 that is engaged to a gear-lock part 21 of the support piece 50 is provided at the rear, upper end of the fan case 3, and the fan case 3 is pivoted rotatably by the support piece 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cooler and a blower installed in a cool air passage formed between a product storage room and a heat insulating box, and circulates cool air from the cooler in a certain direction. The present invention relates to a low-temperature showcase of a type in which a cool air curtain is formed in an opening of a product storage room.

[0002]

2. Description of the Related Art In a low-temperature showcase disclosed in Japanese Utility Model Publication No. 5-10217 and Japanese Patent Publication No. 4-81716, a cold air passage is formed substantially along a heat insulating wall forming a main body. A product storage room is provided so as to be surrounded by the cool air passage, a cooler and a blower are arranged in a cool air passage formed between the product storage room and the heat insulating wall, and a bottom surface of the product storage room is provided. It has a structure with a removable bottom plate.

As shown in FIGS. 7 to 10, reference numeral 10 denotes a cooler placed in a cool air passage 7, and a fan case 3
Normally, as shown by the solid line in FIG. 10, a hinge for mounting and supporting the fan case 3 so as to be rotatable in the vertical direction is provided at the upper end thereof, that is, at the rear end of the upper surface wall 3a. For example, six in FIG. 9 are provided in accordance with the length of the fan case. Reference numeral 12 denotes a fixing member for mounting and fixing the cooler 10 and rotatably supporting the fan case 3. The fixing member 12 is disposed substantially horizontally above the cold air passage 7 and substantially in the width direction of the low-temperature showcase 17. It is provided in.

[0004] As shown in FIGS. 7 and 8, in order to clean the bottom 9 of the cool air passage 7 located below the product storage room 1, the fan case 3 to which the blower 2 is fixed is mounted.
After pivoting upward with the hinge 4 as a fulcrum as shown by the solid line in FIG. 8, the bottom portion 29 of the low-temperature showcase 17 is cleaned.

[0005]

By the way, in the case of the conventional fixing system in which the fan case is rotated for cleaning the product storage room, a plurality of fans and a fan motor are integrally provided in the fan case. Since the fan case is heavy, it requires a large number of hinges for mounting and supporting the fan case so as to be rotatable up and down. Depending on the width of the fan case, the required number of hinges may range from two to as many as ten or more, and the hinges are structurally expensive.

In addition, the bottom of the heat insulating box may be slightly expanded or dented compared to a predetermined shape of the heat insulating box during or after foaming. In such a case, the fixing member and the fan case are separated from each other. Since they are mounted via hinges so that they do not shift, the lower part of the fan case and the bottom of the cold air passage cannot cope with each other, leaving a gap. This causes a so-called short cycle in which the flow of the cold air flows back into the cold air passage, thereby hindering the smooth flow of the cold air.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and eliminates the need for a hinge for rotating a fan case during cleaning, thereby reducing the cost and preventing a short cycle of cold air. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided a low-temperature showcase including a cooler disposed in a cool air passage formed around a commodity storage room, a blower, and a cooler disposed in the cool air passage. A cooling fan, wherein the cooling unit is provided with a support piece, and a rear upper end portion of the fan case is provided with an engagement portion which engages with a locking portion of the support piece. The fan case is rotatably supported by the support piece.

According to a second aspect of the present invention, in the low-temperature showcase according to the first aspect, the engaging portion of the fan case includes:
A substantially horizontal first horizontal flange provided between the locking portion of the support piece and the tube plate of the cooler; and an upright flange located inside the locking portion of the support piece. is there.

According to the first and second aspects of the present invention,
Since a hinge for rotating the fan case during cleaning is not required, a low-cost showcase can be provided. Further, since the lower portion of the fan case and the bottom of the heat insulating box are in close contact with each other, a so-called short cycle does not occur, and a smooth flow of cool air in the cool air passage can be secured.

According to a third aspect of the present invention, there is provided the low temperature showcase according to the first aspect, wherein the engaging portion of the fan case comprises:
A substantially horizontal first horizontal flange provided between the engaging portion of the support piece and the tube plate of the cooler, an upstanding flange located inside the engaging portion of the support piece, An extended substantially horizontal second horizontal flange.

According to the third aspect of the present invention, the angle at which the fan case can be turned can be made constant, so that the fan case is turned too much and the fan case comes off the support piece or the fan of the blower hits the cooler. It can be prevented from being damaged.

A low temperature showcase according to a fourth aspect of the present invention, wherein the restricting portion restricts the longitudinal movement of the fan case at a position outside the fan case in the longitudinal direction and outside the support piece. Is provided.

According to the invention of claim 4, since the movement of the fan case in the longitudinal direction is restricted, the fan case does not fall off. Therefore, the cleaning operation of the bottom of the low-temperature showcase, which is performed by rotating the fan case, and the restoration to the normal state can be favorably performed.

[0015]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. 7 to 10
1 are denoted by the same reference numerals, and FIG. 1 to FIG. 5 show a main part in which the bottom plate 14 and the like are omitted.

In FIG. 6, reference numeral 15 denotes a main body formed of a heat insulating wall. The main body 15 has a machine room 16 for accommodating a compressor and a condenser (not shown) at a lower portion thereof.
A front cold air passage 7a is formed along the path. Above the fan case 3, a bottom plate 1 that forms the bottom surface of the product storage room 1
4 is removably mounted.

Reference numeral 10 denotes a cooler placed in the cool air passage 7. FIG. 3 is an exploded perspective view showing the cooler 10, the fan case 3, and the like. The cooler 10 is a so-called plate-fin type heat exchanger, and has left and right end portions and a central portion of the tube sheet 3.
, And a plurality of heat exchange fins 37 disposed between the tube sheets 36, 36,.
6 and a refrigerant pipe 38 penetrating through the heat exchange fins 37. The left and right bend portions 39 of the refrigerant pipe 38 make U-turns outside the right and left end tube plates 36, 36, respectively. Refrigerant pipes 38a, 38a at both ends serving as an inlet and an outlet of the refrigerant are connected to a compressor, an expansion valve, and a condenser (not shown) to constitute a refrigeration cycle.
Further, a U-shaped defrost heater 40 is provided from the immediate front of the cooler 10 to the left and right sides, and is energized at regular time intervals to melt frost attached to the cooler 10 and defrost it.

Numeral 50 denotes tube sheets 36, 36, 36 of the cooler 10.
Is a support piece fixed to the upper part of the base plate, and is formed by bending a strip-shaped steel plate having a small width. As shown in FIG. , And the substantially horizontal portions of the three support pieces 50, 50, 50 are fixed to the upper substantially horizontal surface of the tube plates 36, 36,... Of the cooler 10 placed in the cool air passage 7 by screws. Have been.

As shown in FIG. 3, the fan case 3 is made of a steel plate, and has a top wall 3a, a front wall 3b, left and right side walls 3c, 3c.
c, and the rear surface and the lower surface are open. The fan case 3 has a blower 2
.. Correspond to ventilation holes 34 formed in the upper surface wall 3a.
34 and are fixedly supported.

As shown in FIG. 1, a substantially horizontal first horizontal flange 29, a substantially vertical rising flange 28, and a substantially vertical rising flange 28 are provided at the rear upper end of the fan case 3, that is, at the rear end of the upper wall 3a. An extended substantially horizontal second horizontal flange 31 is formed. The first horizontal flange 29 of the fan case 3 is provided with the locking portions 2 of the support pieces 50, 50, 50.
1 and an upper substantially horizontal surface of the tube sheet 36 of the cooler 10. On the other hand, the first horizontal flange 2 of the fan case 3
The two are engaged by a substantially L-shaped engaging portion 30 composed of the support 9 and the upstanding flange 28 and the engaging portion 21 of the support pieces 50, 50, 50. It is pivotally supported on the upper side.

In FIG. 5, the left and right support pieces 5
A regulating member 34 having an upright portion 33 in the front-rear direction is arranged further outside of 0 and 50, and the upper end of the rear portion of the fan case 3 is restricted from moving in the longitudinal direction by the regulating member 34.

When the low-temperature showcase 17 is operated for cooling, the cool air is circulated by the blower 2 as shown by the solid arrow in FIG. 6, and the air is discharged from the outlet 18 of the back cool air passage 7b to the inlet of the front cool air passage 7a. An air curtain toward 19 is formed, and the product in the product storage room 1 is cooled well.

Here, in order to clean the inside of the product storage room 1, after removing the bottom plate 14 of the product storage room 1, the fan case 3
When the fan case 3 is lifted when the fan case 3 is rotated upward, as shown in FIG. 2, the fan case 3 is connected to the upper tube plate 36 of the cooler 10 and the locking portions 21 of the support pieces 50 50 50. Can be pivoted upward from the cooler 10 with the gap between them as a fulcrum. Then, when the fan case 3 rotates to a certain angle, the second horizontal flange 31 formed at the upper end of the rear part of the fan case 3 hits the tube plate 36 and is restricted, so that it does not further rotate. That is, when the second horizontal flange 31 is set to a predetermined size, the angle at which the fan case 3 can rotate can be fixed, so that the fan case 3 is rotated too much and the fan case 3 comes off the support piece 50, It is possible to prevent the fan of the blower 2 from being damaged by hitting the cooler 10.

Next, a procedure for cleaning the bottom 9 in the low-temperature showcase 17 is performed as follows. First, the bottom plate 14 is removed. Thereafter, the user holds the fan case 3 and pivots rearward with the gap between the upper tube plate 36 of the cooler 10 and the locking portion 21 of the support pieces 50, 50, 50 as a fulcrum. The fan case 3 is pulled up until a position where can be entered. In this state, the periphery of the bottom 9 including the cool air passage 7 and the cooler 10 are cleaned.

When the cleaning is completed, the fan case 3 is held, and the tube sheet 36 on the upper part of the cooler 10 and the support pieces 50, 50,
With the gap held between the locking portion 21 and the locking portion 50 as a fulcrum, the rotation is made forward to return to the original state. Thereafter, when the bottom plate 14 is placed, the original state before the cleaning is restored.

Next, the bottom portion 9 of the cool air passage 7 may be slightly expanded or depressed as compared with the shape of the predetermined heat insulating box during or after foaming, and the fan case 3 may rise or sink accordingly. become. In that case, FIG.
In the conventional fixing method using the hinge 4 as shown in FIG. 1, the fixing member 12 and the fan case 3 are attached via the hinge 4 so as not to be displaced from each other. In some cases, a gap may be formed between the lower part of 3c and 3c and the bottom part 29 of the cool air passage 7. However, in this embodiment, the cooler 10
Of the upper tube sheet 36 and the support pieces 50, 50, 50
1 and the fan case 3 can be moved back and forth to some extent, so that there is no gap between the lower portions of the left and right side walls 3 c and 3 c of the fan case 3 and the bottom 9 of the cool air passage 7. That is, since the fan case 3 easily moves back and forth in response to the deformation of the bottom 9, the conventional fan case 3
There is no gap created due to the fact that the lower part of the left and right side walls 3c, 3c did not adhere to the bottom 9. Therefore, it is sucked by the blowers 2.
The cold air sent to the 0 side again blows air from this gap
Since a so-called short cycle, which flows backward to the suction side of ・, can be prevented, it flows smoothly in the cold air passage 7.

In FIG. 5, the left and right support pieces 5
Since the regulating member 34 having the upright portion 33 in the front-rear direction is arranged further outside of 0 and 50, the regulating member 3
The movement of the fan case 3 in the longitudinal direction as shown in FIG. In other words, when the fan case 3 is rotated, the fan case 3 is not displaced in the longitudinal direction and the engagement between the engaging portion 30 of the fan case 3 and the locking portion 21 of the support piece 50 is prevented from being disengaged. Will not fall off. Therefore, it is possible to satisfactorily perform the cleaning operation of the bottom portion 9 of the low-temperature showcase 17 and the restoration to the normal state, which are performed by rotating the fan case 3.

[0028]

As described above, claims 1 and 2 are as described above.
According to the invention, a hinge for rotating the fan case at the time of cleaning is not required, so that a low-cost showcase can be provided. Further, since the lower part of the fan case and the bottom of the cool air passage are in close contact with each other, a so-called short cycle does not occur, and a smooth flow of cool air in the cool air passage can be secured.

According to the third aspect of the present invention, the angle at which the fan case can be rotated can be made constant, so that the fan case is excessively rotated and the fan case comes off the support piece, or the fan of the blower hits the cooler. It can be prevented from being damaged.

According to the invention of claim 4, since the movement of the fan case in the longitudinal direction is restricted, the fan case does not fall off. Therefore, the cleaning operation of the bottom of the low-temperature showcase, which is performed by rotating the fan case, and the restoration to the normal state can be favorably performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main part of an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of a main part showing a state in which a fan case in FIG. 1 is rotated.

FIG. 3 is a perspective view of a main part of the embodiment of the present invention.

FIG. 4 is a perspective view of a main part of FIG. 3, showing a case where there is no regulating member.

FIG. 5 is a perspective view of a main part showing a case where there is a regulating member.

FIG. 6 is a vertical side view of a low-temperature showcase according to an embodiment of the present invention.

FIG. 7 is a longitudinal sectional side view of a main part of a conventional example.

8 is a vertical sectional side view of a main part showing a state where the fan case in FIG. 7 is rotated.

FIG. 9 is a perspective view of a main part of a fan case according to a conventional example.

FIG. 10 is a vertical side view of a conventional low-temperature showcase.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Commodity storage room 2 Blower 3 Fan case 10 Cooler 12 Fixing member 14 Bottom plate 21 Locking part 28 Standing flange 29 First horizontal flange 30 Engaging part 31 Second horizontal flange 33 Standing part 36 Tube plate 50 Support piece

Claims (4)

[Claims] 1. A low-temperature showcase comprising: a cooler disposed in a cool air passage formed around a commodity storage room; and a fan case supporting a blower and disposed in the cool air passage. The container is provided with a support piece, and at the rear upper end of the fan case, an engagement portion is provided for engaging with a locking portion of the support piece, and the fan case is rotatable by the support piece. A low-temperature showcase pivotally mounted on the low-temperature showcase. 2. An engaging portion of the fan case, a substantially horizontal first horizontal flange provided between a locking portion of the support piece and a tube plate of a cooler, and a locking of the support piece. The low-temperature showcase according to claim 1, further comprising an upright flange located inside the portion. 3. An engaging portion of the fan case, a first horizontal flange provided substantially between a locking portion of the support piece and a tube plate of a cooler, and a locking portion of the support piece. The low-temperature showcase according to claim 1, further comprising an upstanding flange located inside the portion, and a second substantially horizontal flange extending from the upstanding flange. 4. A restricting member having a restricting portion for restricting a longitudinal movement of the fan case is provided at a position outside the fan case in the longitudinal direction and outside the support piece. The low-temperature showcase according to claim 1, 2 or 3, wherein: