Showcase drain structure

Abstract

To prolong a time until filter clogging occurs.SOLUTION: A filter member 40 which includes a filter base part 41 that forms a bottomed cylindrical form and has a plurality of introduction ports 412a formed on a side peripheral part 412 along a circumferential direction at prescribed intervals and a filter flange part 42 extending outward in a radial direction from an upper end of the filter base part 41 is mounted on a drain water reception member 30 installed at a drainage port 16a formed on a heat insulation bottom wall 15 of a showcase. The filter member 40 includes: a plurality of first weir parts 421 which are provided at an outer peripheral edge part of the filter flange part 42 along the circumferential direction in a mode in which they extend along an axial direction at prescribed intervals; and a plurality of second weir parts 422 which are provided at an inner peripheral edge part of the filter flange part 42 along the circumferential direction in a mode in which they extend along the axial direction at prescribed intervals. In the plurality of second weir parts 422, intervals between adjacent weir parts are smaller than intervals between adjacent weir parts of the first weir part 421.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a drainage hole structure of a showcase. [Background technology]

[0002] Conventionally, a drain outlet is formed in the insulated bottom wall of a showcase to discharge drain water generated to cool the storage chamber of the showcase, and a drain water receiving member is installed in a manner that blocks this drain outlet.

[0003] This drain water receiving member has a trap section at the bottom for temporarily storing drain water, and when the level of the drain water stored in the trap section exceeds a predetermined height, the drain water is allowed to flow out from the outlet.

[0004] By the way, the drain water flowing toward the drain outlet generally contains dust and other debris, and in order to prevent the drain outlet from becoming clogged with this dust, a filter member is placed on the drain water receiving member.

[0005] The filter member comprises a cylindrical filter base with a bottom, and a filter flange portion extending radially outward from the upper end of the filter base, and a plurality of inlet ports are formed at predetermined intervals along the circumferential direction on the side peripheral portion of the filter base.

[0006] Such a filter member allows dust particles flowing in together with the drain water to accumulate inside the filter base, and allows only the drain water to pass through the inlet (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2007-215799 A Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the drain structure proposed in the above-mentioned Patent Document 1, although dust can be stored inside the filter base, if the amount of dust stored becomes large, the inlet may be blocked, causing the filter to become clogged. In order to prevent such filter clogging, it is necessary to remove the dust that has accumulated inside the filter base, but if this work is performed frequently, it becomes troublesome for the worker.

[0009] In view of the above-mentioned circumstances, an object of the present invention is to provide a drain structure for a showcase that can extend the time until filter clogging occurs. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, the drain structure of a showcase of the present invention is a drain structure in which a filter member having a filter base in the form of a bottomed cylinder and having a plurality of inlets extending along the axial direction formed at a predetermined interval along the circumferential direction on its side peripheral portion, and a filter flange portion extending radially outward from the upper end of the filter base, is placed on a drain water receiving member installed in a manner to allow drain water to flow out at a drain port formed in an insulated bottom wall of the showcase, wherein the filter member has a plurality of first dam portions provided on the outer peripheral edge portion of the filter flange portion in a manner extending along the axial direction at predetermined intervals along the circumferential direction, and a plurality of second dam portions provided on the inner peripheral edge portion of the filter flange portion in a manner extending along the axial direction at predetermined intervals along the circumferential direction, and the spacing between adjacent second dam portions is smaller than the spacing between adjacent first dam portions.

[0011] The present invention is also characterized in that, in the drain structure of the above-mentioned showcase, the multiple inlets are formed in such a manner that their width dimension gradually increases as they approach the upper end of the filter base, and the multiple second dam portions have a spacing between adjacent ones that is approximately the same as the maximum width dimension of the inlets.

[0012] Furthermore, in the present invention, in the drain outlet structure for a showcase, the second dam portion is formed integrally with the filter flange portion. Effect of the Invention

[0013] According to the present invention, the filter member comprises a plurality of first dam portions provided on the outer peripheral edge portion of the filter flange portion so as to extend axially at predetermined intervals along the circumferential direction, and a plurality of second dam portions provided on the inner peripheral edge portion of the filter flange portion so as to extend axially at predetermined intervals along the circumferential direction, and the distance between adjacent second dam portions is smaller than the distance between adjacent first dam portions. Therefore, dust matter guided along with drain water can be stored in the area formed by the plurality of first dam portions and the plurality of second dam portions in the filter flange portion, and the time required for dust matter to be stored inside the filter base of the filter member can be extended, thereby achieving the effect of lengthening the time until filter clogging occurs. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a sectional side view of a showcase to which a drainage port structure according to an embodiment of the present invention is applied. [Diagram 2] FIG. 2 is a plan view showing the drain outlet and its surrounding structure shown in FIG. 1 as viewed from above. [Diagram 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 4 is an exploded perspective view of the drain water receiving member and the filter member shown in FIGS. [Diagram 5]FIG. 5 is an exploded perspective view of the drain water receiving member and the filter member shown in FIGS. 2 and 3. FIG. [Figure 6] FIG. 6 is a cross-sectional view showing the flow of drain water in the drain outlet structure formed of the drain water receiving member and the filter member shown in FIGS. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a drainage hole structure for a showcase according to the present invention will be described in detail below with reference to the accompanying drawings.

[0016] 1 is a cross-sectional side view of a showcase to which a drainage hole structure according to an embodiment of the present invention is applied. The showcase illustrated here includes a case body 10.

[0017] The case body 10 is a substantially rectangular parallelepiped housing, and includes a heat-insulated storage chamber 10a and a machine chamber 10b provided below the storage chamber 10a. The storage chamber 10a has an opening 11 (hereinafter also referred to as the front opening) formed on the front side, within which a storage chamber 12 is defined and in which air circulation means 20 is provided.

[0018] The storage room 12 is a room defined in a manner facing the front opening 11, and has a plurality of product placement shelves 13 arranged in a plurality of levels along the vertical direction.

[0019] The air circulation means 20 is configured to include an air passage 21 and a circulation fan 22. The air passage 21 is an air passage that extends from an intake port 23 to an exhaust port 24. The intake port 23 is an opening for drawing in air inside the storage chamber 12, and extends along the left-right direction of the storage chamber 12. The intake port 23 is disposed at the lower front edge of the storage chamber 12, i.e., at the lower part near the front opening 11 of the case body 10.

[0020] The air outlet 24 is an opening for blowing air into the interior of the storage chamber 12, and is provided extending along the left-right direction of the storage chamber 12. The air outlet 24 is disposed at the upper front edge of the storage chamber 12, i.e., at the upper portion near the front opening 11 of the case body 10, and is fitted with a straightening member 24a having a honeycomb structure in which pores are arranged in a honeycomb shape.

[0021] Such air passage 21 is configured in such a manner that a lower duct 21a located below and outside the storage chamber 12, a rear duct 21b located on the rear side of and outside the storage chamber 12, and an upper duct 21c located above and outside the storage chamber 12 are mutually connected.

[0022] The circulation fan 22 circulates air and is disposed at a predetermined position in the lower duct 21a. In the present embodiment, the circulation fan 22 is disposed at a predetermined position in the lower duct 21a, but in the present invention, the position where the circulation fan 22 is disposed is not particularly limited, and the circulation fan 22 may be disposed at any position as long as the circulation fan 22 can perform its function.

[0023] In this type of air circulation means 20, the circulation fan 22 is driven to suck in air inside the storage chamber 12 through the suction port 23, and the sucked air is sent out to the air outlet 24 in a manner that the air passes through the air passage 21, and then the air is blown out through the air outlet 24 into the storage chamber 12, thereby circulating air between the inside and outside of the storage chamber 12.

[0024] An evaporator 25 is provided in the rear duct 21b of the air passage 21. The evaporator 25 constitutes a refrigerant circulating means for circulating a refrigerant together with refrigeration equipment such as a compressor and a condenser (not shown) arranged in the machine room 10b. Here, the compressor compresses the refrigerant, and the condenser condenses the refrigerant compressed by the compressor. The refrigerant condensed by the condenser is adiabatically expanded by an expansion valve to a low temperature and low pressure state.

[0025] The evaporator 25 exchanges heat between the air passing through the rear duct 21b from below to above as the circulation fan 22 is driven and the refrigerant adiabatically expanded by the expansion valve, and more specifically, cools the air passing through the rear duct 21b (air passage 21) by evaporating the refrigerant. The refrigerant evaporated in the evaporator 25 returns to the compressor and is compressed again.

[0026] The machine room 10b is provided below the accommodation room 10a and is closed at the rear and left and right sides. A machine room opening 10c is formed in the front of the machine room 10b and is closed by a kick plate 10d.

[0027] An exhaust duct 26 communicates with the machine room 10b. The exhaust duct 26 is provided on the rear side of the rear duct 21b of the air passage 21, separated from the rear duct 21b, and communicates with the machine room 10b in the vertical direction. The exhaust duct 26 has an exhaust inlet 26a formed at the bottom and an exhaust outlet 26b formed at the top. The exhaust inlet 26a is an opening that communicates with the machine room 10b. The exhaust outlet 26b is an opening for discharging air that has passed through the exhaust duct 26 to the outside.

[0028] In the case body 10, a drain hole 16 is formed in the insulated bottom wall 15 that separates the storage chamber 12 and the machine chamber 10b. The drain hole 16 is a hole for discharging drain water generated in the evaporator 25 etc., and is formed in a manner that penetrates the insulated bottom wall 15 from top to bottom. The upper opening of this drain hole 16 faces the lower duct 21a and constitutes a drain outlet 16a.

[0029] 2 is a plan view showing the drain outlet 16a and its surrounding structure shown in FIG. 1 as viewed from above, and FIG. 3 is a cross-sectional view taken along line AA in FIG.

[0030] 2 and 3, the drain water receiving member 30 and the filter member 40 constituting the drain outlet structure according to the embodiment of the present invention are installed in a manner that blocks the drain outlet 16a. The configurations of the drain water receiving member 30 and the filter member 40 will be described in the state in which the drain water receiving member 30 and the filter member 40 are installed in a manner that blocks the drain outlet 16a.

[0031] The drain water receiving member 30 is formed, for example, from a resin material, and as shown in Figures 4 and 5, is configured by integrally molding a bottomed cylindrical receiving main body portion 31 and a receiving flange portion 32 extending radially outward from the upper end of the receiving main body portion 31.

[0032] The outer diameter of the receiving body 31 is smaller than the diameter of the drain outlet 16a, i.e., the inner diameter of the drain hole 16. The receiving body 31 is also formed so that the extension length along the axial direction is slightly larger than the vertical dimension of the drain hole 16.

[0033] A cylindrical outflow pipe portion 312 extending along the axial direction of the receiving body portion 31 is formed in the center portion of the bottom portion 311 of the receiving body portion 31 .

[0034] The outflow pipe section 312 is formed so that the outer diameter dimension is smaller than the inner diameter dimension of the receiving body section 31, with the upper end portion protruding upward from the bottom section 311 and the lower end portion protruding downward from the bottom section 311. An inlet 312a that allows the inflow of drain water is formed at the upper end of the outflow pipe section 312, and an outlet 312b that allows the drain water to flow out is formed at the lower end of the outflow pipe section 312. The receiving flange section 32 is formed so that the outer diameter dimension is larger than the diameter of the drain port 16a.

[0035] Such a drain water receiving member 30 is arranged in such a manner that it enters the drain hole 16 from above and blocks the drain outlet 16a by placing the receiving flange portion 32 on the opening edge of the drain outlet 16a in the insulating bottom wall 15.

[0036] When drain water is introduced into the drain water receiving member 30, the drain water can be temporarily stored in the bottom 311 until the drain water level reaches the inlet 312a. When the drain water level is above the inlet 312a, the drain water receiving member 30 allows a portion of the drain water stored in the bottom 311 to flow in through the inlet 312a, pass through the inside of the outlet pipe portion 312, and then flow out downward from the outlet 312b.

[0037] That is, in the drain water receiving member 30, the bottom portion 311 and the outflow pipe portion 312 form a trap portion that temporarily stores the drain water.

[0038] A drain pan 27 is disposed in the area directly below the drain hole 16, and the drain water flowing downward from the outlet 312b of the drain water receiving member 30 is stored in the drain pan 27. A drain sheet 271 is provided upright on the drain pan 27. The drain sheet 271 sucks in the drain water stored in the drain pan 27 by capillary action. A blower fan 28 is provided on the rear side of the drain pan 27.

[0039] The filter member 40 is formed, for example, from a resin material, and as shown in Figures 4 and 5, is configured by integrally molding a bottomed cylindrical filter base 41 and a filter flange portion 42 extending radially outward from the upper end of the filter base 41.

[0040] The filter base 41 is formed so that the outer diameter dimension is smaller than the inner diameter dimension of the receiving body 31 and the inner diameter dimension is larger than the outer diameter dimension of the outflow pipe portion 312.

[0041] Bottom wall portion 411 forming the bottom portion of filter base 41 is curved in a manner that gradually slopes upward from the peripheral portion toward the central portion, and a rod-shaped knob portion 411a is formed in the central portion in a manner that protrudes upward from the upper end opening of filter base 41.

[0042] The peripheral side portion 412 of the filter member 40 extends from the bottom wall portion 411 toward the upper end and also extends downward from the bottom wall portion 411. In the region of the peripheral side portion 412 from the bottom wall portion 411 to the upper end, a plurality of inlets 412a extending along the axial direction (up-down direction) are formed at predetermined intervals along the circumferential direction. The width of the plurality of inlets 412a gradually increases from the bottom wall portion 411 toward the upper end.

[0043] The filter flange portion 42 has an annular shape formed so that the outer diameter dimension is larger than the inner diameter dimension of the receiving flange portion 32. This filter flange portion 42 is formed with a plurality of (eight in the illustrated example) first dam portions 421 and a plurality of (30 in the illustrated example) second dam portions 422.

[0044] The first dam portions 421 are provided integrally with the filter flange portion 42 on the outer circumferential edge portion of the filter flange portion 42 at predetermined intervals along the circumferential direction and extend along the axial direction (up-down direction) of the filter member 40. Each of the first dam portions 421 is a plate-like body curved in an arc shape.

[0045] The second dam portions 422 are provided integrally with the filter flange portion 42 at predetermined intervals along the circumferential direction on the inner peripheral edge of the filter flange portion 42, extending along the axial direction of the filter member 40. These second dam portions 422 are long rod-shaped members whose longitudinal direction is the up-down direction.

[0046] These multiple second dam sections 422 are formed so that the distance between adjacent ones is smaller than the distance between adjacent first dam sections 421, and more specifically, are formed so that the distance between adjacent ones is approximately the same as the maximum width dimension of the inlet 412a.

[0047] The filter member 40 is placed on the drain water receiving member 30 with the filter flange portion 42 in contact with the receiving flange portion 32 to form a drain port structure.

[0048] Here, when the filter member 40 is placed on the drain water receiving member 30, a gap is formed between the outflow pipe portion 312 and the bottom wall portion 411, and the inflow port 312a is open, and a gap is also formed between the inner surface of the portion of the side peripheral portion 412 of the filter base 41 extending downward from the bottom wall portion 411 and the outer surface of the outflow pipe portion 312.

[0049] 6, in the drain outlet structure having the above-mentioned configuration, the drain water guided to the drain outlet 16a passes between the first weir portions 421, then passes between the second weir portions 422, is introduced from the inlet 412a, and is stored in the bottom 311 of the drain water receiving member 30. When the water level of the drain water stored in the bottom 311 of the drain water receiving member 30 is above the inlet 312a of the outflow pipe portion 312, a part of the drain water flows into the outflow pipe portion 312 from the inlet 312a, and the drain water that passes downward inside the outflow pipe portion 312 flows out downward from the outlet 312b and is stored in the drain pan 27.

[0050] In the above drain structure, the filter member 40 includes a plurality of first weir portions 421 provided on the outer peripheral edge of the filter flange portion 42 in a manner extending in the axial direction at predetermined intervals along the circumferential direction, and a plurality of second weir portions 422 provided on the inner peripheral edge of the filter flange portion 42 in a manner extending in the axial direction at predetermined intervals along the circumferential direction, and the intervals between adjacent ones of the second weir portions 422 are smaller than the intervals between adjacent ones of the first weir portions 421, so that an annular catch area CE consisting of the plurality of first weir portions 421 and the plurality of second weir portions 422 can be formed on the upper part of the filter flange portion 42 as shown in Fig. 2, and dust guided together with the drain water can be stored in the catch area CE. Since the dust can be stored in the catch area CE in this way, the time required for the dust to be stored inside the filter base portion 41 of the filter member 40 can be extended. Therefore, according to the above-described drain outlet structure, it is possible to lengthen the time until the filter becomes clogged.

[0051] In addition, since the catch area CE is formed on the upper part of the filter flange portion 42, even when the filter member 40 is detached and removed from the drain water receiving member 30, dust accumulated in the catch area CE can be easily removed.

[0052] Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this and various modifications can be made.

[0053] In the above-described embodiment, the distance between adjacent second dam portions 422 was approximately the same as the maximum width dimension of the inlet 412a, but in the present invention, the size of the distance between adjacent second dam portions is not particularly limited as long as it is smaller than the distance between adjacent first dam portions.

[0054] In the above-described embodiment, the first dam portion 421 and the second dam portion 422 were provided integrally with the filter flange portion 42, but in the present invention, the first dam portion and the second dam portion may be separate from the filter flange portion, as long as they are provided in the filter flange portion. [Explanation of symbols]

[0055] 10...case body, 10a...accommodation chamber, 10b...machine chamber, 12...storage chamber, 13...product placement shelf, 15...insulated bottom wall, 16...drain hole, 16a...drain outlet, 20...air circulation means, 21...air passage, 22...circulation fan, 25...evaporator, 30...drain water receiving member, 31...receiving body portion, 311...bottom, 312...outflow pipe portion, 312a...inlet, 312b...outlet, 32...receiving flange portion, 40...filter member, 41...filter base, 411...bottom wall portion, 411a...grip portion, 412...side peripheral portion, 412a...inlet, 42...filter flange portion, 421...first dam portion, 422...second dam portion, CE...catch area.

Claims

1. a filter base having a bottomed cylindrical shape and a plurality of inlets extending along the axial direction on a side circumferential portion at predetermined intervals along the circumferential direction; a filter flange portion extending radially outward from an upper end portion of the filter base; A drainage outlet structure in which a filter member having the above structure is placed on a drainage water receiving member that is installed in a manner that allows drain water to flow out of a drainage outlet formed in an insulating bottom wall of a showcase, The filter member is a plurality of first dam portions provided on an outer peripheral edge portion of the filter flange portion at predetermined intervals along a circumferential direction and extending along the axial direction; a plurality of second dam portions provided at predetermined intervals along a circumferential direction on an inner peripheral edge portion of the filter flange portion so as to extend along the axial direction; Equipped with The plurality of first dam portions are plate-like bodies curved in an arc shape, A drain structure for a showcase, characterized in that the distance between adjacent second dam sections is smaller than the distance between adjacent first dam sections, and the second dam sections are long rod-shaped members whose longitudinal direction is in the up-down direction.

2. All of the plurality of inlets are formed in such a manner that their widths gradually increase toward the upper end of the filter base, The drain structure of a showcase according to claim 1, characterized in that the spacing between adjacent ones of the plurality of second dam portions is approximately the same as the maximum width dimension of the upper end portion of the inlet.

3. 3. The drain structure of a showcase according to claim 1, wherein the second dam portion is formed integrally with the filter flange portion.

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