JPH10288446A - Cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate maintenance of a filter device to remove dust flowing in the condenser of a cooling device. SOLUTION: A cooling device comprises a condenser 29 arranged in a machine chamber 27; a panel 37 positioned on the air inflow side of the condenser 29 and opening and closing the machine chamber 27; an air intake port 39 formed in the panel 37; and a filter device 83 arranged between the air intake port 39 and the condenser 29. The filter device 83 comprises a filter 86 formed of a paper or cloth, and a mounting tool 84 to removably mount the filter sheet 86 to the panel 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for a low-temperature showcase or the like.

[0002]

2. Description of the Related Art Conventionally, such a low-temperature showcase or the like installed in a supermarket, a convenience store or the like is constituted by a heat-insulating box as shown in, for example, Japanese Patent Publication No. 63-26313 (F25D19 / 00). A machine room is formed in a lower part of the main body, and a compressor, a condenser, a blower, and the like included in the refrigeration cycle are installed in the machine room. Then, the blower operates to suck outside air from an air inlet (outside air suction port), ventilates the condenser and air-cools, then ventilates the compressor and other devices, and finally passes through the outlet to the outside. Was configured to be discharged.

In addition, a filter is provided between the condenser and the air intake to remove dust flowing into the condenser, thereby preventing deterioration of heat radiation performance due to clogging of the condenser.

FIG. 16 shows a structure of a filter portion of the conventional low-temperature showcase shown in FIG. In the figure, reference numeral 101 denotes a panel for opening and closing the machine room. The panel 101 is formed with a plurality of slit-shaped air inlets 102. A condenser (not shown) is installed in the machine room at a position facing the air inlets 102 of the panel 101, and a blower is installed on the opposite side.

A pair of left and right holding plates 103, 103 having an L-shaped cross section are fixed by welding to the inside of the panel 101, and a filter 10 is provided between the holding plates 103, 103.
4 is inserted and held. The filter 104 is formed by attaching a stitch-shaped screen 107 to a rectangular frame 106 formed of a synthetic resin or the like in a wire shape, and is detachably inserted between the holding plates 103, 103 as shown by arrows in the figure. Has been inserted.

When the blower is operated, the outside air is sucked from the air inlets 102,.
After passing through 04, it flows into the condenser. Dust, oil and the like mixed in the sucked outside air adhered to the filter 104 and were filtered.

[0007]

As described above, since dust and oil contained in the outside air adhere to the filter 104, the filter 104 is clogged if left unattended. Therefore, conventionally, the filter 104 was removed from the panel 101 and periodically cleaned by hitting or spraying water. However, in recent years, due to the promotion of space saving in stores, it has become difficult to perform such cleaning work in stores.

Further, the filter 104 is used in the above-mentioned operation.
The work of removing dust and the like is extremely troublesome, and in recent years, as clerks have become more and more part-time workers, there has been a strong demand for simplification of maintenance work itself such as cleaning of filters.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem, and is intended to facilitate maintenance of a filter device for removing dust and the like flowing into a condenser of a cooling device. Aim.

[0010]

SUMMARY OF THE INVENTION A cooling device according to the present invention is provided with a condenser installed in a machine room, a panel located on the air inflow side of the condenser to open and close the machine room, and a panel formed on the panel. And a filter device disposed between the air inlet and the condenser, the filter device comprising: a filter sheet made of paper or cloth; And a fixture that is detachably attached to a panel or a condenser.

According to the present invention, the filter device disposed between the condenser of the cooling device and the air intake of the panel is provided with a filter sheet made of paper or cloth, and the filter sheet is detachably attached to the panel or the condenser. And dust attached to the condenser, the dust and oil in the outside air flowing into the condenser can be removed by the filter sheet of the filter device. This makes it possible to prevent the condenser from being clogged.

Further, the filter device is composed of a filter sheet made of paper or cloth and an attachment for detachably attaching the filter sheet. If the filter sheet becomes dirty with dust or the like, only the filter sheet is removed. It can be discarded and replaced with a new one (in the case of paper), or washed at a washing place in a store (in the case of cloth) and reused.

Accordingly, maintenance work such as cleaning and attachment / detachment of the filter device becomes extremely easy. In particular, if the filter device is attached to the condenser, the flow of air flowing into the condenser acts in a direction in which the filter sheet is pressed against the condenser, so that the filter sheet or the attachment is less likely to come off. .

According to a second aspect of the present invention, in the cooling device, the mounting member is formed of a frame member, and the frame member is detachably mounted on the panel in a state where the filter sheet is detachably attached to the frame member. It is.

According to the second aspect of the present invention, in addition to the above, the mounting member is constituted by a frame member, and the frame member is detachably mounted on the panel in a state where the filter sheet is detachably attached to the frame member. As a result, the filter device can be handled like a conventional filter,
It will be versatile.

According to a third aspect of the present invention, in the cooling device described above, the attachment includes a holding portion formed of a soft material, and a part of the filter sheet is pushed into a cut formed in the holding portion. A filter sheet is detachably attached to a fixture.

According to the third aspect of the present invention, in addition to the above, a holding portion made of a soft material is provided on the fixture, and a part of the filter sheet is pushed into a cut formed in the holding portion. Since the filter sheet is detachably attached to the fixture, when removing the filter sheet from the fixture, it can be removed simply by pulling it out from the notch in the holding part, and after replacing the filter sheet, or after washing The filter sheet can be attached to the fixture simply by pushing a part of the filter sheet into the notch of the holding portion.

[0018] This makes it extremely easy to attach and detach the filter sheet to and from the mounting fixture, so that the maintenance workability of the filter device can be further improved.
In particular, since a holding portion made of a soft material is formed on the fixture and a cut is formed in this holding portion, the number of parts is small,
The cost can also be reduced.

According to a fourth aspect of the present invention, in the cooling device according to the second aspect, the mounting member includes a frame-shaped main body and a stopper that is detachably fitted to the main body via a filter sheet. It is.

According to the fourth aspect of the present invention, in addition to the second aspect, the mounting tool is constituted by a frame-shaped main body and a stopper which is detachably fitted to the main body via a filter sheet. When removing the filter sheet from the fixture, it can be removed simply by removing the stopper from the main body, replace the filter sheet, or after washing, simply fit the stopper into the main body via the filter sheet and pinch it With this, the filter sheet can be attached to the body of the fixture.

This makes it extremely easy to attach and detach the filter sheet to and from the mounting fixture, thereby further improving the maintenance workability of the filter device.
In particular, since the attachment is composed of a frame-shaped main body and a stopper, the structure can be simplified and the cost of parts can be reduced.

According to a fifth aspect of the present invention, in the cooling device according to the first aspect, the attachment is constituted by a magnet which is attracted to a panel or a condenser via a filter sheet.

According to the fifth aspect of the present invention, in addition to the first aspect, the mounting member is constituted by a magnet which is attracted to the panel or the condenser via the filter sheet. The filter sheet can be removed simply by pulling it apart, and after the filter sheet is replaced or after washing, the filter sheet can be attached to the panel or the condenser simply by adsorbing and holding the magnet.

This makes it extremely easy to attach and detach the filter sheet to the panel or the condenser, and it is possible to further improve the maintenance workability of the filter device. In particular, since it is attached by a magnet, the structure is simple and the cost can be reduced.

According to a sixth aspect of the present invention, in the cooling device according to the first aspect, the mounting member is formed of a soft material provided on the panel, and a part of the filter sheet is pressed into a cut formed in the soft material. Thus, the filter sheet is detachably attached to the panel.

According to the sixth aspect of the present invention, in addition to the first aspect, the mounting member is made of a soft material provided on the panel, and a part of the filter sheet is pressed into the cut formed in the soft material. As a result, the filter sheet is detachably attached to the panel, so when removing the filter sheet from the panel, it can be removed simply by pulling it out from the cut of soft material, and replace the filter sheet,
Alternatively, after washing, the filter sheet can be attached to the panel simply by pushing a part of the filter sheet into the cut of the soft material.

This makes it extremely easy to attach and detach the filter sheet to and from the panel, thereby further improving the maintenance workability of the filter device.
In particular, since a soft material is provided on the panel and cuts are formed in the soft material, the number of parts is small and the cost can be reduced.

According to a seventh aspect of the present invention, in the cooling device according to the first aspect, the attachment is constituted by a stopper which is removably fitted to a tube plate of the condenser via a filter sheet.

According to the seventh aspect of the present invention, in addition to the first aspect, the fitting is constituted by a stopper which is detachably fitted to the tube plate of the condenser via the filter sheet, so that the filter sheet is condensed. When removing from the vessel, it can be removed simply by removing the stopper, replace the filter sheet, or after washing, simply fit the stopper into the condenser tube sheet and pinch it, the filter sheet into the condenser Be able to attach.

This makes it extremely easy to attach and detach the filter sheet to and from the condenser, thereby further improving the maintenance workability of the filter device.
In particular, since the structure is such that the stopper is merely fitted to the tube plate of the condenser, the structure is simplified and the cost can be reduced.

[0031]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a rear perspective view of a low-temperature showcase 1 as an embodiment of a cooling device to which the present invention is applied, FIG. 2 is a vertical side view of the low-temperature showcase 1, and FIG. Another rear perspective view of the showcase 1, and FIG. 4 is a sectional view of the low-temperature showcase 1 including a panel 37.

In each of the drawings, a low-temperature showcase 1 is used for displaying and storing ice cream and the like in a convenience store or the like, and is constituted by a horizontally-long rectangular heat-insulating box 2 opened upward. .

The heat-insulating box 2 is made up of a metal outer box 3 and a metal inner box 6
And a foam insulation material 7 such as polyurethane foam filled between the boxes 3 and 6 by an in-situ foaming method.

Duct plates 8 and 9 are attached to the inside of the front and rear surfaces of the inner box 6 at intervals.
A bottom plate 11 is detachably installed between the lower ends of the inner box 6, thereby forming a series of ducts 12 rising up and down from the bottom inside the inner box 6.
A storage room 22 is defined inside the bottom plate 9 and 9. on the other hand,
The bottom wall 13 of the heat insulating box 2 has a stepped shape having a lower portion 13A at a front portion and a higher portion 13B at a rear portion, and the bottom plate 11 is located above the higher portion 13B.

A drain pan 14 made of a metal plate such as stainless steel or aluminum is provided on the upper surface of the lower portion 13A of the bottom wall 13, and the lowest position of the drain pan 14 communicates with the outside of the heat insulating box 2 below. Drainage hole 16
Are formed. Above the drain pan 14, a horizontally long plate fin type cooler 17 is disposed in the duct 12, and a fan case 18 provided on the front side of the cooler 17 comprises a suction type propeller fan. A plurality of blowers 19 are provided.

The high-order portion 13B on the rear side of the cooler 17
The stepped portion of the lower portion 13A has an inclined surface 13C such that the upper portion is separated from the cooler 17. The upper end of the duct plate 9 is a discharge port 9A, the upper end of the duct plate 8 is a suction port 8A, and wind direction plates 21, 21 which are curved inward are attached to the discharge port 9A at predetermined intervals.

On the other hand, on both sides of the opening of the heat-insulating box 2, side plates 41, 41 made of a thick plate of transparent acrylic resin are provided upright. The side plates 41, 41 have a substantially mountain shape that is inclined such that the upper portions of the front and rear sides 41A, 41B are close to each other, and a stainless steel top plate 42 is also provided between the upper end portions thereof. It is screwed from the side via 43.

The top plate 42 has a mountain-shaped cross section along the shape of the upper portions of the side plates 41, 41. The lower surface of the top plate 42 is provided with front and rear stainless steel upper support plates 44, 44, which are also made of stainless steel. A plate 46 is attached. The upper support plates 44, 44 have a predetermined distance from the lower surface of the top plate 42, and the tips thereof are inclined downward downward substantially along the inclination of the front and rear sides 41A, 41B of the side plate 41, respectively. A horizontally long fluorescent lamp 51 is housed and arranged on the lower surface of the reflection plate 46, and a stabilizer 52 for lighting the fluorescent lamp 51 is arranged on the upper surface.

On the other hand, rails 63, 63 are attached to the front and rear opening edges of the heat insulating box 2 across the left and right. Between the rails 63, 63 and the top plate 42, the storage room 22 of the low-temperature showcase 1 is Open in the front-rear direction (opening 64, 6
4) Yes. With this configuration, the upper edges of the front and rear openings 64, 64 of the storage room 22 of the low-temperature showcase 1 are located deeper than the lower edge and open diagonally upward, and the rails 63, 63 are located below these openings 64, 64. The front and rear side surfaces of the upper support plates 44, 44 and the reflection plate 46 are located at the edges.
Will be located at the upper edge.

On the rail 63, a plurality of sliding doors 73 made of, for example, a transparent acrylic resin plate or transparent glass are slidably mounted and supported. In this case, in the embodiment, eight doors 7 are arranged in front and rear of each of the two doors.
3 is supported, the upper part of the door 73 supported inside is supported by the front and rear side surfaces of the reflection plate 46, and the upper part of the door 73 supported outside is supported by the upper support plate 44.

Kick plates 26, 26 having a large number of through holes 24 at the lower and front ends of the heat insulating box 2 (the front one is an air outlet, the rear one is an air inlet).
A machine room 27 is formed between the kick plates 26 and 26 and below the heat insulating box 2. And the machine room 2 located below the high-order portion 13B
Inside the compressor 7, a compressor (not shown), a condenser 29, a condenser blower 31, an electric box 91, etc., which constitute a well-known refrigeration cycle together with the cooler 17, are arranged on a base 35. The rear surface of the machine room 27 has a plurality of panels 36 to
A plurality of slit-shaped air intakes 39 are formed in the panels 37 and 38 by cutting and raising the panels.

The air inlet 39 of the panel 37
.. Correspond to the air suction side of the condenser 29. The condenser 29 has tube sheets 32 on both sides,
, Which are arranged at predetermined intervals between the heat exchange fins 32, and a meandering refrigerant pipe 34 which penetrates the heat exchange fins 33 and is fixed to the tube sheets 32, 32. It is composed of

On the other hand, the kick plate 26 is
5 via a hinge 81, and the panel 37
Is fixed to the upper end of the kick plate 26. As a result, the panel 37 is pivotally supported on the base 35 together with the kick plate 26 so that the machine chamber 27 is closed on the air inflow side of the condenser 29 as shown in FIG. It is openable and closable so as to be pivoted outward and downward to open the machine room 27 (same for the panel 36).

A pair of left and right holding plates 82, 82 having an L-shaped cross section are welded and fixed to the inside of the panel 37, and a filter device 83 is provided between the holding plates 82, 82 from the upper end side of the panel 37. It is inserted and held detachably. As shown in FIG. 5, the filter device 83 includes a mounting member 84 composed of a frame member, and a filter sheet 86 detachably attached to the mounting member 84 and having a predetermined air permeability.

The mounting member 84 is formed of a hard synthetic resin in the shape of a thin picture frame, a bar 84A is formed at the center thereof, and soft materials are formed above and below the left and right sides 84B and 84B. The holding portions 87 are integrally formed. Further, cuts 88 are formed in each of the holding portions 87.

On the other hand, the filter sheet 86 is made of paper or cloth, and in this embodiment, a sheet made of paper (Shintex (trade name) manufactured by Nippon Medical Products Co., Ltd.) is used. The filter sheet 86 is formed with countless fine holes or gaps, and has a predetermined air permeability and prevents the passage of dust and oil.

The filter sheet 86 shown in FIG.
For example, as shown in the figure, the left and right ends are disposed on the front side of the mounting fixture 84, and are turned backward so as to wind the left and right sides 84B, 84B. It is attached to the fixture 84 by being pushed into the notch 88.

The filter device 83 thus configured
Is inserted between the holding plates 82 as described above with the panel 37 opened as shown in FIG. 3, and is disposed between the air inlet 39 and the condenser 29 (FIG. 4). Incidentally, reference numeral 89 in FIG. 3 denotes a power cord.

Next, the operation of the low-temperature showcase 1 having the above configuration will be described. When the compressor and the blower 19 and the blower 31 for the condenser are operated, the cool air cooled by the cooler 17 is blown rearward in the duct 12 from the inclined surface 13C and stored from the discharge port 9A at the upper end of the duct plate 9. It is discharged toward the upper part of the chamber 22. The cool air circulated in the storage chamber 22 is sucked into the duct 12 from the suction port 8A at the upper end of the duct plate 8 and circulates back to the blower 19 (indicated by a broken arrow in FIG. 2). Thereby, the inside of the storage room 22 is, for example,-
It is cooled to a freezing temperature such as 20 ° C.

On the other hand, when the condenser blower 31 is operated, outside air is sucked from the air intake 39 of the panel 37,
After passing through the filter device 83, it flows into the condenser 29 and is cooled by air. The dust and oil contained in the sucked outside air are removed from the filter sheet 86 of the filter device 83.
And is filtered. The air discharged from the condenser blower 31 is discharged to the outside through the through holes 24 of the front kick plate 26.

As described above, since dust and oil contained in the outside air adhere to the filter sheet 86 of the filter device 83, clogging occurs if left unattended. Therefore,
The panel 37 is periodically opened as shown in FIG. 3, and the filter device 83 is pulled out from the holding plates 82, 82 (indicated by white arrows in FIG. 3). Then, the filter sheet 86 is attached to the holding section 8.
7, the filter sheet 86 is attached to the fixture 84 by pushing a new filter sheet 86 into the notch 88 of the holding portion 87 as described above, and inserted again into the holding plates 82, 82. Removably attach.

Thus, the clogging of the filter sheet 86 is eliminated. In particular, since attachment and detachment of the filter sheet 86 to and from the attachment 84 are extremely easy, maintenance workability such as cleaning and attachment / detachment of the filter device 83 is further improved. When a cloth sheet is used as the filter sheet 86, it is washed with a washing machine or the like,
After drying, it can be reused.

Next, FIGS. 6 and 7 show the filter device 8.
3 shows another embodiment. In this case, the fixture 84 is composed of a main body 84C in which a wire made of a metal or a hard synthetic resin is formed in a rectangular frame shape, and a stopper 92 (upper and lower) having a dimension to be detachably fitted to the main body C. 2 to 4 in the upper, lower, left, and right directions (only one is shown in the figure).

In this case, the filter sheet 86
Is directed to the main body 84C, and the stopper 92 is fitted to the main body 84C via the filter sheet 86 so that the end of the filter sheet 86 is sandwiched between the two. With such a configuration, the filter sheet 86 can be easily attached to the attachment 84 as described above.

FIG. 8 shows still another embodiment. In this case, the filter sheet 86 is attached to the back surface of the panel 37 by a magnet MG which is detachably attached to the back surface of the panel 37. That is, in this case, the magnet MG constitutes a fixture.

FIG. 9 shows still another embodiment. In this case, mounting members 93... Made of a soft synthetic resin are provided at the upper and lower four corners of the rear surface of the panel 37. A cut 93A is formed on the back surface of each mounting fixture 93.
By pushing the four corners of the filter sheet 86 into the cuts 93A, the filter sheet 86 is
It is detachably attached to the.

Next, FIGS. 10 and 11 show still another embodiment. In this case, the filter sheet 86 is directly addressed to the air suction side of the condenser 29 and the magnet MG is connected to the tube sheet 3.
By adsorbing the filter sheet 86 on both sides of the filter sheet 86, the filter sheet 86
9 is detachably attached. That is, also in this case, the magnet MG serves as a fixture.

In particular, in this case, since the filter device 83 is attached to the condenser 29, the flow of air flowing into the condenser 29 acts in a direction to press the filter sheet 86 against the condenser 29, and the filter sheet 86 or the magnet M
G is less likely to fall off.

FIG. 12 and FIG. 13 show still another embodiment. In this case, the tube sheets 32, 3
2 has a front end protruding in the direction of the panel 37 to form a flange 32A.
And, in that state, the filter sheet 86
Directly to the air suction side of the condenser 29, and the clips 94, 94 as stoppers are detachably fitted to the left and right flanges 32A, 32A of the tube plates 32, 32 (indicated by arrows in FIG. 13). The filter sheet 86 is detachably attached to the condenser 29 by sandwiching both sides of the filter sheet 86. That is, in this case, the clip 94 serves as an attachment.

In this case, as shown in FIG.
A stopper 95 is constituted by a frame 95 which is detachably fitted (indicated by an arrow in FIG. 14) to the inside of the flanges 32A, 32A, and the filter sheet 86 may be sandwiched between the outer surfaces of both sides and the flanges 32A, 32A. .

Further, as shown in FIG.
3 is attached to a rectangular outer frame 84D made of sheet metal or resin and an inner frame 84E fitted into the outer frame 84D.
May be configured. In this case, the outer frame 84D is formed with concave portions 84F that are recessed inward at two locations in the vertical direction, and the inner frame 84E is removed via the sheet 86 while the filter sheet 86 is directed to the outer frame 84D. The filter sheet 86 is sandwiched between the recesses 84F... And the inner frame 84E by being detachably fitted in the frame 84D.

The filter device 83 in which the filter sheet 86 is attached to the attachment 84 in this manner is inserted between the holding plates 82 of the panel 37 as in the case of FIG.

Further, a rubber band (not shown) is provided on the periphery of the filter sheet 86 with the filter sheet 86 directed to the condenser 29, and the flanges 32A, 32A of the tube plate 32 of the condenser 29 are utilized by utilizing the elasticity. The filter sheet 86 may be attached detachably.

In the embodiment, the present invention is applied to a low-temperature showcase. However, the present invention is not limited to this, and the present invention is effective for various cooling devices in which a filter device is installed between a condenser installed in a machine room and a panel. .

[0065]

As described above in detail, according to the present invention, a filter device disposed between a condenser of a cooling device and an air inlet of a panel is provided with a filter sheet made of paper or cloth and the like. Since it is composed of a panel or an attachment that is detachably attached to the condenser, dust and oil in the outside air flowing into the condenser can be removed by the filter sheet of the filter device. This makes it possible to prevent the condenser from being clogged.

Further, since the filter device is composed of a filter sheet made of paper or cloth and an attachment for detachably attaching the filter sheet, if the filter sheet is contaminated with dust or the like, only the filter sheet is removed. It can be discarded and replaced with a new one (in the case of paper), or washed (in the case of cloth) and reused.

Accordingly, maintenance work such as cleaning and attachment / detachment of the filter device becomes extremely easy. In particular, if the filter device is attached to the condenser, the flow of air flowing into the condenser acts in a direction in which the filter sheet is pressed against the condenser, so that the filter sheet or the attachment is less likely to come off. .

According to the second aspect of the present invention, in addition to the above, the mounting member is constituted by a frame member, and the frame member is detachably mounted on the panel in a state where the filter sheet is detachably attached to the frame member. As a result, the filter device can be handled like a conventional filter,
It will be versatile.

According to the third aspect of the present invention, in addition to the above, a holding portion formed of a soft material is provided on the fixture, and a part of the filter sheet is pushed into the cut formed in the holding portion. Since the filter sheet is detachably attached to the fixture, when removing the filter sheet from the fixture, it can be removed simply by pulling it out from the notch in the holding part, and after replacing the filter sheet, or after washing The filter sheet can be attached to the fixture simply by pushing a part of the filter sheet into the notch of the holding portion.

[0070] This makes it extremely easy to attach and detach the filter sheet to and from the fixture, thereby further improving the maintenance workability of the filter device.
In particular, since a holding portion made of a soft material is formed on the fixture and a cut is formed in this holding portion, the number of parts is small,
The cost can also be reduced.

According to the fourth aspect of the present invention, in addition to the second aspect, the mounting member is constituted by the frame-shaped main body and the stopper which is detachably fitted to the main body via the filter sheet. When removing the filter sheet from the fixture, it can be removed simply by removing the stopper from the main body, replace the filter sheet, or after washing, simply fit the stopper into the main body via the filter sheet and pinch it With this, the filter sheet can be attached to the body of the fixture.

This makes it extremely easy to attach and detach the filter sheet to and from the mounting fixture, thereby further improving the maintenance workability of the filter device.
In particular, since the attachment is composed of a frame-shaped main body and a stopper, the structure can be simplified and the cost of parts can be reduced.

According to the fifth aspect of the present invention, in addition to the first aspect, the mounting member is constituted by a magnet which is attracted to the panel or the condenser via the filter sheet. The filter sheet can be removed simply by pulling it apart, and after the filter sheet is replaced or after washing, the filter sheet can be attached to the panel or the condenser simply by adsorbing and holding the magnet.

This makes it extremely easy to attach and detach the filter sheet to the panel or the condenser, thereby further improving the maintenance workability of the filter device. In particular, since it is attached by a magnet, the structure is simple and the cost can be reduced.

According to the sixth aspect of the present invention, in addition to the first aspect, the mounting member is made of a soft material provided on the panel, and a part of the filter sheet is pressed into the cut formed in the soft material. As a result, the filter sheet is detachably attached to the panel, so when removing the filter sheet from the panel, it can be removed simply by pulling it out from the cut of soft material, and replace the filter sheet,
Alternatively, after washing, the filter sheet can be attached to the panel simply by pushing a part of the filter sheet into the cut of the soft material.

As a result, the attachment and detachment of the filter sheet to and from the panel becomes extremely easy, and the maintenance workability of the filter device can be further improved.
In particular, since a soft material is provided on the panel and cuts are formed in the soft material, the number of parts is small and the cost can be reduced.

According to the seventh aspect of the present invention, in addition to the first aspect, the fitting is constituted by a stopper which is detachably fitted to the tube plate of the condenser via the filter sheet. When removing from the vessel, it can be removed simply by removing the stopper, replace the filter sheet, or after washing, simply fit the stopper into the condenser tube sheet and pinch it, the filter sheet into the condenser Be able to attach.

Thus, the attachment and detachment of the filter sheet to and from the condenser become extremely easy, and the maintenance workability of the filter device can be further improved.
In particular, since the structure is such that the stopper is merely fitted to the tube plate of the condenser, the structure is simplified and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a rear perspective view of a low-temperature showcase as an embodiment of a cooling device to which the present invention is applied.

FIG. 2 is a vertical side view of a low-temperature showcase as an embodiment of a cooling device to which the present invention is applied.

FIG. 3 is a rear perspective view of the low-temperature showcase with a panel opened.

FIG. 4 is a sectional view of a low-temperature showcase of a panel portion.

FIG. 5 is an exploded perspective view of the filter device.

FIG. 6 is an exploded perspective view of another filter device.

FIG. 7 is a sectional view taken along line AA of FIG. 6;

FIG. 8 is a sectional view of a panel portion of another low-temperature showcase.

FIG. 9 is a sectional view of a panel portion of still another low-temperature showcase.

FIG. 10 is a rear perspective view of another low-temperature showcase with a panel opened.

FIG. 11 is a sectional view of a panel portion of the low-temperature showcase of FIG. 10;

FIG. 12 is a rear perspective view of another low-temperature showcase with a panel opened.

FIG. 13 is a plan view of a condenser and a filter device of the low-temperature showcase of FIG. 12;

FIG. 14 is a plan view of a condenser and a filter device of still another low-temperature showcase.

FIG. 15 is an exploded perspective view of another low-temperature showcase filter device.

FIG. 16 is a sectional view of a panel portion of a conventional low-temperature showcase.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature showcase 2 Insulated box 3 Outer box 6 Inner box 7 Foam insulation 26 Kick plate 27 Machine room 29 Condenser 31 Condenser blower 32 Tube plate 32A Flange 37 Panel 39 Air intake 82 Holding plate 83 Filter device 84, 93 Fixture 84C Main body 86 Filter sheet 87 Holder 88, 93A Cut 92 Stopper 94 Clip (stopper) 95 Frame (stopper) MG Magnet

Claims (7)

[Claims] 1. A condenser installed in a machine room, a panel located on an air inflow side of the condenser to open and close the machine room, an air inlet formed in the panel, and an air inlet And a filter device disposed between the condenser and the condenser, the filter device comprising: a filter sheet made of paper or cloth; and a filter sheet detachably attached to the panel or the condenser. A cooling device, comprising: a mounting fixture to be attached. 2. A cooling device according to claim 1, wherein said mounting member is constituted by a frame member, and said frame member is detachably attached to said panel with said filter sheet detachably attached to said frame member. apparatus. 3. The mounting device has a holding portion formed of a soft material, and the filter sheet is detachably attached to the mounting device by pressing a part of the filter sheet into a cut formed in the holding portion. 3. The cooling device according to claim 2, wherein the cooling device is mounted on the cooling device. 4. The cooling device according to claim 2, wherein the attachment comprises a frame-shaped main body and a stopper which is detachably fitted to the main body via a filter sheet. 5. The cooling device according to claim 1, wherein the attachment is constituted by a magnet that is attracted to a panel or a condenser via a filter sheet. 6. The mounting member is made of a soft material provided on the panel, and a part of the filter sheet is pushed into a cut formed in the soft material, so that the filter sheet is detachably attached to the panel. The cooling device according to claim 1, wherein the cooling device is attached. 7. The cooling device according to claim 1, wherein the attachment comprises a stopper which is detachably fitted to a tube plate of the condenser via a filter sheet.