JP7064982B2 - Refrigerator drainage structure - Google Patents

Description

Patent Law Article 30 Paragraph 2 Applicable Sales Date May 7, 2018 Sales Destination Lawson Rakusai Exit Station North Store 1-1 Ishida, Terado-cho, Muko-shi, Kyoto

The present invention relates to a drainage structure for draining drain water such as dew condensation water, defrosting water, or washing water in the refrigerator generated in the refrigerator to the outside of the refrigerator. Regarding the improvement of the drainage structure with a trap to prevent backflow.

This type of drainage structure is known, for example, in Patent Document 1. In the showcase of Patent Document 1, a drainage device (drainage structure) is composed of a drain screen (strainer), a drain receiving member, and a drainage device fixing member, and a trap is provided between the drain screen and the drain receiving member. ing. The drain screen is formed in a circular cage shape, and a plurality of projecting pieces having locking claws projecting outward are provided downward at the outer peripheral end of the bottom wall of the screen body constituting the screen. .. The locking claw engages the locking portion provided on the drainage device fixing member, which prevents the drain screen from floating even if a large amount of drain water flows into the trap in a short period of time. It prevents the trap function from being impaired. The engagement strength of the locking claws with respect to the locking portion prevents the drain screen from being lifted by the drain water, and when the drain screen is lifted by hand, the engagement between the two is released and the drain screen is released from the drainage device fixing member. Is set to the extent that it can be removed.

Japanese Unexamined Patent Publication No. 2005-16902.

Although the forming material of each member constituting the drainage device of the showcase of Patent Document 1 is not specified, it can be presumed that each member is composed of a resin molded product capable of relatively easily forming the shape of each member. In the drain screen made of a resin molded product and the drainage device fixing member, it is inevitable that the engagement strength of the locking claw with the locking portion changes to a predetermined engagement strength due to the molding error of both. .. Therefore, when the engagement strength is smaller than the predetermined engagement strength, the drain screen can be removed more easily, but the drain screen is lifted by the drain water received by the drain receiving member, and the drain screen is attached to the drainage device fixing member. The engaged state may be released and the trap function may be impaired. On the contrary, when the engagement strength is larger than the predetermined engagement strength, it is possible to surely prevent the trap function from being impaired due to the lifting of the drain screen, but it becomes difficult to remove the drain screen due to the large engagement strength. ..

The present invention has the contradictory problems of reliably preventing the strainer from floating due to drain water and making it easy to remove the strainer during cleaning in order to prevent the trap function from being impaired. The aim is to obtain a refrigerator drainage structure with traps that can be achieved at the same time.

The present invention is provided on the lower wall 17 of the refrigerator body 1 made of a heat insulating box body, and is fixed to the lower wall 17 to receive drain water, and is mounted inside the drain cup 19 to capture dust. The drainage structure of the refrigerator equipped with the strainer 20 is targeted. A trap 51 is formed between the drain cup 19 and the strainer 20 mounted on the drain cup 19 to prevent the outside air from flowing into the refrigerator. The strainer 20 includes first and second strainer portions 40 and 41, and the first strainer portion 40 is projected upward from the peripheral edge portion of the second strainer portion 41 formed in a dish shape, and the refrigerator body 1 It is composed of a plurality of projecting pieces 49 projecting above the lower wall 17. A holding structure is provided between the lower wall 17 or the drain cup 19 of the main body 1 and the strainer 20 to prevent the strainer 20 from separating from the drain cup 19. The holding structure is composed of a locking portion 54 provided on the lower wall 17 or the drain cup 19 of the main body 1 and a hooking piece 55 provided on the strainer 20 and engaged with the locking portion 54. Further, at least a pair of projecting pieces 49 facing each other with the center of the strainer 20 sandwiched between them are elastically deformable, and each of the pair of projecting pieces 49 is provided with a hooking piece 55. ..

The drain cup 19 includes a cup portion 25 formed in a cup shape having an upper surface opened by a cup bottom wall 23 and a cup peripheral wall 24 extending upward from the peripheral edge of the cup bottom wall 23. A locking portion 54 is provided on the inner peripheral surface of the cup peripheral wall 24 of the cup portion 25 so as to project inward, and the hook piece 55 is provided so as to project outward on the outer surface of the projecting piece 49 configured to be elastically deformable. Can be taken in the form of providing.

The strainer 20 is made of a resin molded product. The storage body 1 is composed of an outer box 5 and an inner box 6 made of a metal plate material, and a heat insulating material 7 filled between the two boxes 5 and 6. The drain cup 19 is fixed to the through hole 18 opened so as to penetrate the lower wall 17 inward and outward. A circumferential reinforcing wall 56 bent toward the outer box 5 is formed on the peripheral portion of the through hole 18 in the inner box 6. By inserting the reinforcing wall 56 into the upper side of the cup peripheral wall 24 of the drain cup 19, the reinforcing wall 56 is configured to also serve as a locking portion 54 protruding inward from the inner peripheral surface of the cup peripheral wall 24. It can take a form.

The second strainer portion 41 includes a strainer bottom wall 45, a downward-sloping strainer peripheral wall 46 surrounding the bottom wall 45, and a flange seat 47 formed so as to project outward from the upper edge of the peripheral wall 46. Form in a dish shape. It is possible to adopt a form in which a dome portion 43 having a bulge formed in an upward protruding curved shape is provided in the central portion of the strainer bottom wall 45.

In the drainage structure according to the present invention, the holding structure of the strainer 20 engages with the locking portion 54 provided on the lower wall 17 or the drain cup 19 of the main body 1 and the locking portion 54 provided on the strainer 20. It was composed of a hook piece 55. Further, at least a pair of projecting pieces 49 of the first strainer portion 40 facing each other with the center of the strainer 20 sandwiched between them are configured to be elastically deformable, and each of the pair of projecting pieces 49 is provided with a hook piece 55. According to such a holding structure, the engagement of the hooking piece 55 with the locking portion 54 is released by elastically deforming the pair of projecting pieces 49 so as to separate the hooking piece 55 from the locking portion 54. .. As a result, in order to surely prevent the strainer 20 from rising, even if the engagement strength of the hook piece 55 with the locking portion 54 is set to a large value in consideration of the molding error, only the pair of projecting pieces 49 are elastically deformed. The strainer 20 can be easily removed from the drain cup 19 by disengaging the engagement state of both 54 and 55 with a simple operation. As described above, according to the present invention, in order to prevent the function of the trap 51 from being impaired, the strainer 20 can be reliably prevented from floating due to drain water, and the strainer 20 can be easily removed. It is possible to obtain a drainage structure of a refrigerator that can simultaneously achieve the conflicting problems.

A locking portion 54 is provided on the inner peripheral surface of the cup peripheral wall 24 of the drain cup 19 so as to project inward, and the hook piece 55 is provided so as to project outward on the outer surface of the projecting piece 49 configured to be elastically deformable. Was provided. According to such a holding structure, the elastically deformable projectiles 49 are elastically deformed so as to be close to each other, in other words, the elastically deformable projectiles 49 are elastically deformed so as to be pinched inward by the fingers to hook the locking portion 54. The engagement of the stop piece 55 can be disengaged. Therefore, the strainer 20 can be removed from the drain cup 19 by disengaging the two 54 and 55 with one touch.

By inserting the circumferential reinforcing wall 56 formed in the peripheral portion of the through hole 18 in the inner box 6 into the upper side of the cup peripheral wall 24 of the drain cup 19, the reinforcing wall 56 is inside the inner peripheral surface of the cup peripheral wall 24. It is configured to also serve as a locking portion 54 protruding in the direction. According to this, the wear due to the contact between the locking portion 54 and the hook piece 55 when the strainer 20 is attached / detached occurs mainly in the hook piece 55 on the strainer 20 side made of a resin molded product, and the reinforcing wall 56 of the metal plate material. There is almost no wear of the locking portion 54 made of. Therefore, even if the engagement strength between the two 54 and 55 becomes small due to wear due to long-term use, only the strainer 20 is replaced with a new one while the locking portion 54, which is difficult to replace on the storage body 1 side, remains as it is. The function of the holding structure can be easily restored just by doing so. Further, since the reinforcing wall 56 can be used as a positioning member for the drain cup 19, there is an advantage that the drain cup 19 can be accurately fixed at an appropriate position of the through hole 18.

The second strainer portion 41 is composed of a strainer bottom wall 45, a downwardly narrowed strainer peripheral wall 46 surrounding the bottom wall 45, and a flange seat 47 formed so as to project outward from the upper edge of the peripheral wall 46. A dish-shaped dome portion 43 is provided at the center of the strainer bottom wall 45 so as to be bulged in an upward protruding curved shape. According to such a strainer 20, when the strainer 20 is removed from the drain cup 19, dust can be removed without being dropped by the dish-shaped second strainer portion 41. Further, since the dust captured by the second strainer portion 41 can be collected in the circumferential recessed portion formed between the strainer peripheral wall 46 and the dome portion 43, there is an advantage that the captured dust can be collectively removed. ..

It is a vertical sectional side view of the drainage structure which concerns on this invention. It is a vertical sectional side view of the refrigerated open showcase to which the drainage structure which concerns on this invention is applied. It is a top view which shows the drainage structure. It is an enlarged sectional view which shows the holding structure. It is a vertical sectional front view of a strainer. It is a vertical sectional side view which shows the state which the strainer was removed.

(Examples) FIGS. 1 to 6 show examples in which the present invention is applied to a refrigerated open showcase which is a kind of refrigerator. The front-back, left-right, and up-down in this embodiment follow the crossing arrows shown in FIGS. 1 to 3 and the front-back, left-right, and up-down indications shown in the vicinity of each arrow. In FIG. 2, the refrigerated open showcase is provided with a case body (storage body) 1 composed of a vertically long rectangular parallelepiped box body having an open front surface, and the inside of the storage surrounded by the case body 1 is an inner case 2 and a display room 3 It is divided into a cold air circulation passage 4 and a cold air circulation passage 4. The case body 1 is composed of an outer box 5 and an inner box 6 made of a metal plate material, and a heat insulating material 7 filled between the two boxes 5 and 6 as a heat insulating box body. A plurality of display shelves 10 are provided inside the display room 3.

The cold air circulation passage 4 is formed between a downward air outlet 11 provided at the upper front end of the display chamber 3 and an upward suction port 12 provided at the lower front end of the display chamber 3, and evaporates inside the air outlet 12. A vessel 13 and a blower fan 14 for circulating cold air are installed. The circulating cold air blown out from the outlet 11 and sucked into the suction port 12 cools the inside of the display chamber 3 and forms an air curtain on the front surface of the display chamber 3. The evaporator 13 constitutes a refrigerating device with a compressor, a condenser, a condensation fan, etc. installed in an external unit (not shown), and the compressor and the condenser in the external unit, and the evaporator 13 are It is connected via a refrigerant pipeline.

The dew condensation water generated in the display chamber 3 and the cold air circulation passage 4, the defrost water when the frost on the evaporator 13 is melted and removed, or the drain water such as the washing water in the refrigerator open showcase flows downward. It is received by the lower wall 17 of the case body 1. As shown in FIG. 2, the inner box 6 of the lower wall 17 that receives the drain water has a front portion that is inclined downward toward the rear side and a rear portion that is inclined downward toward the front side. A through hole 18 that penetrates the main body 1 inside and outside is opened. The through hole 18 is formed in an oval shape in a plan view, and the through hole 18 has a drainage structure for draining drain water received by the lower wall 17 of the case body 1 to the outside of the case body 1. It is provided. The outer shape of each member constituting the drainage structure of this embodiment in a plan view is formed in an oval shape similar to the through hole 18 (see FIG. 3).

As shown in FIG. 1, the drainage structure includes a drain cup 19 fixed to a lower wall 17 to receive drain water, and a strainer 20 mounted inside the drain cup 19 to catch dust and the like. The drain cup 19 is made of a resin molded product, and has a cup-shaped cup portion 25 having an upper surface opened by a cup bottom wall 23 and a cup peripheral wall 24 extending upward from the peripheral edge of the cup bottom wall 23, and the cup. It is provided with a tubular drain pipe 26 that is extended upward from the cup bottom wall 23 of the portion 25 and has an open upper and lower surface. Further, the drain cup 19 is provided with a cylindrical connecting pipe 27 extending downward from the cup bottom wall 23, and the drain pipe 29 is connected to the connecting pipe 27 via the elbow 28. The drain water received by the drain cup 19 and flowing down from the upper end opening of the drain pipe 26 is drained through the elbow 28 and the drain pipe 29. The central axis of the drain pipe 26 and the central axis of the connecting pipe 27 are arranged coaxially, and the inner diameter of the drain pipe 26 is formed to be smaller than the inner diameter of the connecting pipe 27.

The drainage structure of this embodiment includes a cup holder 32 fixed to the through hole 18 of the case body 1, and the drain cup 19 is fixed to the lower wall 17 via the cup holder 32. The cup holder 32 is made of a resin molded product, and includes a holder peripheral wall 33 and a pair of fixed flanges 34 and 34 formed by extending outward from the upper and lower ends of the holder peripheral wall 33, respectively. The upper fixed flange 34 is formed in a ring shape having a V shape in a side view so as to correspond to the shape of the inner box 6, and the lower fixed flange 34 is formed in a flat plate ring shape. The cup holder 32 is fixed to the case body 1 by adhering the upper and lower fixing flanges 34 and 34 to the lower surface of the inner box 6 and the upper surface of the outer box 5 at the peripheral edge of the through hole 18, respectively.

As shown in FIGS. 1 and 4, a ring-shaped support seat 35 for supporting the strainer 20 is projected inward in the upper and lower middle portions of the inner surface of the holder peripheral wall 33. A circumferential connecting wall 36 extending downward is provided at the protruding end of the support seat 35, and a connecting groove 37 opening downward is formed between the holder peripheral wall 33 and the connecting wall 36. The cup holder 32 and the drain cup 19 are integrally connected by inserting and adhering the upper end portion of the cup peripheral wall 24 of the drain cup 19 into the connecting groove 37. Since the drain cup 19 of this embodiment is inserted and connected to the connecting groove 37 formed in the upper and lower middle portions of the holder peripheral wall 33, the upper end of the cup portion 25 of the drain cup 19 is located in the upper opening portion of the through hole 18. Not reached. Therefore, the cup holder 32 constitutes a part of the drain cup 19, and the upper half of the holder peripheral wall 33 also serves as the cup peripheral wall 24 of the cup portion 25.

The strainer 20 is made of a resin molded product, and includes a first strainer portion 40 that captures relatively large dust, a second strainer portion 41 that captures relatively small dust, and a trap cap 42. As shown in FIGS. 3 and 5, the lower surface of the trap cap 42 is opened by a dome wall (dome portion) 43 having an upward protrusion curve and a circular cap wall 44 extending downward from the peripheral edge portion of the dome wall 43. It is formed in an inverted cup shape. The second strainer portion 41 includes a strainer bottom wall 45, a downward-sloping strainer peripheral wall 46 surrounding the bottom wall 45, and a flange seat 47 formed so as to project outward from the upper edge of the peripheral wall 46. It is formed in a dish shape. The dome wall 43 is a part of the bottom wall 45 at the center of the strainer bottom wall 45. A group of slit-shaped water passage openings 48 penetrating in the thickness direction are formed in the strainer bottom wall 45, the strainer peripheral wall 46, and the flange seat 47.

As described above, according to the dish-shaped second strainer portion 41, when the strainer 20 is removed from the drain cup 19, dust can be removed without dropping. Further, the dome wall 43 forms a part of the strainer bottom wall 45, and the strainer peripheral wall 46 is formed in a squeezed shape so as to form a circumferential shape between the strainer peripheral wall 46 and the dome wall 43. Since the dust captured by the second strainer portion 41 can be accumulated in the recessed portion, there is an advantage that the captured dust can be collectively removed.

As shown in FIG. 4, the first strainer portion 40 is composed of a plurality of protrusions 49 projecting upward from the peripheral edge portion of the second strainer portion 41, and in this embodiment, ten strip-shaped protrusions are formed. 49s are evenly distributed on the outer peripheral edge of the flange seat 47 (see FIG. 3). Each projecting piece 49 is configured to be elastically deformable in the inward and outward directions of the strainer 20. On the dome wall 43 of the trap cap 42, a knob piece 50 for picking the strainer 20 with a finger when attaching the strainer 20 to the drain cup 19 is projected upward.

As shown in FIGS. 1 and 4, the strainer 20 is attached to the drain cup 19 by receiving the flange seat 47 by the support seat 35 of the cup holder 32. When the strainer 20 is mounted inside the drain cup 19, the trap cap 42 covers the drain pipe 26, and the upper part of the drain pipe 26 and the lower part of the cap wall 44 overlap each other in a double tubular shape to form a double cylinder with the drain pipe 26. A trap 51 is formed between the cap 42 and the cap 42. The trap 51 prevents the air inside the drain pipe 29 (outside the refrigerator) from flowing into the display room 3 (inside the refrigerator). Further, each of the projecting pieces 49 constituting the first strainer portion 40 projects upward from the upper surface of the lower wall 17 around the through hole 18. As a result, the drain water flows down between the pair of adjacent protrusions 49 and 49 and reaches the drain cup 19, but relatively large dust is captured by one protrusion 49 or the adjacent protrusions 49 and 49. Will be done. Further, relatively small dust that is not captured by the first strainer unit 40 is captured by the second strainer unit 41.

As described above, the first and second strainer portions 40 and 41 are provided with the first strainer portion 40 for capturing relatively large dust around the outer periphery of the second strainer portion 41 for capturing relatively small dust. Therefore, it is possible to prevent a large amount of dust from being caught in the first strainer portion 40 and clogging the water passage opening 48 of the second strainer portion 41. As a result, according to the strainer 20 of the present embodiment, the drain water can be reliably drained while the large and small dust contained in the drain water is accurately captured by the first and second strainer portions 40 and 41. .. Further, in the conventional drain screen (strainer) formed in the shape of a circular basket, it takes a lot of time and effort to remove the dust that has entered the inside of the screen and is caught. However, in the strainer 20 of the present embodiment, since the first strainer portion 40 provided on the outside is composed of a plurality of projecting pieces 49, it is easy to access the second strainer portion 41, and therefore, it is captured by the second strainer portion 41. The dust can be easily removed.

In order to prevent the strainer 20 from floating when a large amount of drain water flows into the drain cup 19 and impairing the function of the trap 51, a holding structure is provided to prevent the strainer 20 from separating from the drain cup 19. There is. The holding structure is composed of a locking portion 54 provided on the lower wall 17 or the drain cup 19 of the case body 1 and a hooking claw (hooking piece) 55 provided on the strainer 20 and hooked to the locking portion 54. Will be done. The locking portion 54 of this embodiment is provided on the lower wall 17 of the case body 1.

Specifically, in order to reinforce the refracted portion of the inner box 6, the peripheral edge portion of the through hole 18 in the inner box 6 is bent downward (on the outer box 5 side) to form a circumferential reinforcing wall 56. There is. By inserting the reinforcing wall 56 in close contact with the inside of the upper side of the holder peripheral wall 33 (cup peripheral wall 24 of the drain cup 19), the reinforcing wall 56 protrudes inward from the inner peripheral surface of the holder peripheral wall 33. I tried to double as 54. The reinforcing wall 56 is formed by punching and forming a pilot hole for a through hole 18 in a metal plate material to be an inner box 6 with a press device, and then further burring the peripheral edge of the pilot hole with a press device. The reinforcing wall 56 functions as a positioning member when fixing the cup holder 32 to the through hole 18, and by inserting the reinforcing wall 56 into the holder peripheral wall 33, the proper position of the through hole 18 is obtained. The cup holder 32 (drain cup 19) can be accurately fixed to the center.

The hooking claws 55 are provided on a pair of projecting pieces 49, 49 facing each other with the center of the strainer 20 interposed therebetween. As shown in FIGS. 1 and 3, the hooking claw 55 of this embodiment is formed in a substantially isosceles right triangle shape, and is located near the base end of the front and rear protrusions 49 and 49 located in the center of the left and right sides of the strainer 20. It is provided so as to project outward on the outer surface of the. In the mounted state of the strainer 20, the hooking claw 55 is engaged with the locking portion 54 via a slight gap (see FIG. 4). With the above holding structure, even if a large amount of drain water flows into the drain cup 19 in a short time and the strainer 20 floats, the trap 51 is prevented from floating when the hooking claw 55 abuts on the locking portion 54. The function of is not impaired. In this embodiment, a slight gap is provided between the locking portion 54 and the hooking claw 55, but the gap is set to be smaller than the amount of overlap between the drain pipe 26 and the trap cap 42. Even when the strainer 20 is lifted until the hooking claw 55 and the locking portion 54 come into contact with each other, the function of the trap 51 is maintained.

When the strainer 20 is removed from the drain cup 19 for cleaning or the like, first, relatively large dust trapped by the first strainer unit 40 is removed. Next, the portion of the pair of projecting pieces 49/49 provided with the hooking claw 55 that protrudes upward from the upper surface of the lower wall 17 is pinched with the thumb and index finger, and both projecting pieces 49/49 are turned inward. Elastically deform. At this time, as shown by the alternate long and short dash line in FIG. 4, when the strainer 20 is lifted, the hooking claw 55 is retracted to a position where it does not contact the locking portion 54. By lifting the strainer 20 upward in this state, the strainer 20 can be removed from the drain cup 19 as shown in FIG.

As described above, in the drainage structure according to the present embodiment, the holding structure of the strainer 20 is engaged with the locking portion 54 provided on the lower wall 17 of the case body 1 and the locking portion 54 provided on the strainer 20. It was composed of a hooking claw 55 to be fitted. Further, at least a pair of projecting pieces 49 of the first strainer portion 40 facing each other with the center of the strainer 20 sandwiched between them are configured to be elastically deformable, and each of the pair of projecting pieces 49 is provided with a hooking claw 55. According to such a holding structure, the engagement of the hooking claw 55 with the locking portion 54 is released by elastically deforming the pair of projecting pieces 49 so as to separate the hooking claw 55 from the locking portion 54. .. As a result, in order to surely prevent the strainer 20 from rising, even if the engagement strength of the hooking claw 55 with the locking portion 54 is set to a large value in consideration of the molding error, only the pair of projecting pieces 49 are elastically deformed. The strainer 20 can be easily removed from the drain cup 19 by disengaging the engaged state of both 54 and 55 with a simple operation. As described above, according to the present embodiment, in order to prevent the function of the trap 51 from being impaired, the strainer 20 can be reliably prevented from floating due to drain water, and the strainer 20 can be easily removed. It is possible to obtain a refrigerator drainage structure that can simultaneously achieve the conflicting tasks of doing.

A locking portion 54 is provided on the inner peripheral surface of the cup peripheral wall 24 of the drain cup 19 so as to project inward, and the hooking claw 55 is provided so as to project outward on the outer surface of the projecting piece 49 configured to be elastically deformable. Was provided. According to such a holding structure, the pair of projecting pieces 49 are elastically deformed so as to be close to each other, in other words, the pair of projecting pieces 49 are elastically deformed so as to be pinched inward by two fingers, thereby engaging with the locking portion 54. The engagement of the claw 55 can be released. Therefore, the strainer 20 can be removed from the drain cup 19 by disengaging the two 54 and 55 with one touch.

According to the configuration in which the reinforcing wall 56 formed in the peripheral portion of the through hole 18 in the inner box 6 penetrates into the upper side of the cup portion 25 to form the locking portion 54, the strainer 20 is hooked with the locking portion 54 at the time of attachment / detachment. The wear due to the contact with the clasp 55 occurs mainly in the hook claw 55 on the strainer 20 side made of the resin molded product, and the wear of the locking portion 54 made of the reinforcing wall 56 of the metal plate material hardly occurs. Therefore, even if the engagement strength between the two 54 and 55 becomes small due to contact wear due to long-term use, the locking portion 54, which is difficult to replace on the case body 1 side, remains as it is, and only the strainer 20 is replaced with a new one. The function of the holding structure can be easily restored by simply replacing it.

In the above embodiment, the drain cup 19 is fixed to the lower wall 17 via the cup holder 32, but the cup holder 32 can be omitted. In this case, the vertical dimension of the cup peripheral wall 24 of the cup portion 25 is increased, and a pair of flange portions corresponding to the upper and lower fixed flanges 34 and 34 of the cup holder 32 are formed so as to project outward on the outer surface of the cup peripheral wall 24. .. Further, a seat portion corresponding to the support seat 35 is formed so as to project inward on the inner surface of the cup peripheral wall 24. The locking portion 54 is not limited to the reinforcing wall 56 of the inner box 6, but a protrusion is formed inward on the inner surface of the cup peripheral wall 24 of the cup portion 25 or the holder peripheral wall 33 of the cup holder 32, and the protrusion is locked to the locking portion 54. Can be. The hooking piece 55 can also be formed on two or more projecting pieces 49. Further, the upper ends of the adjacent projecting pieces 49 and 49 may be connected to each other. Further, the present invention is applied to a drainage structure such as a refrigerated open showcase, a refrigerated and frozen closed showcase, a refrigerator, a freezer, an automatic ice maker, and a rapid cooler, in addition to the refrigerated open showcase shown in the above embodiment. Can be done.

1 Warehouse body (case body)
5 Outer box 6 Inner box 7 Insulation material 17 Lower wall 18 Through hole 19 Drain cup 20 Strainer 23 Cup bottom wall 24 Cup peripheral wall 25 Cup part 40 First strainer part 41 Second strainer part 43 Dome part (dome wall)
45 Strainer bottom wall 46 Strainer peripheral wall 47 Flange seat 49 Projection piece 51 Trap 54 Locking part 55 Locking piece (hooking claw)
56 Reinforcing wall

Claims (4)

A drain cup (19) provided on the lower wall (17) of the main body (1) made of a heat insulating box and fixed to the lower wall (17) to receive drain water, and mounted inside the drain cup (19). It is equipped with a strainer (20) that catches garbage .
A trap (51) is formed between the drain cup (19) and the strainer (20) mounted on the drain cup (19) to prevent the outside air from flowing into the refrigerator.
The strainer (20) includes first and second strainer portions (40.41), and the first strainer portion (40) is directed upward from the peripheral portion of the second strainer portion (41) formed in a dish shape. It consists of a plurality of projecting pieces (49) that are projected above the lower wall (17) of the main body (1).
A holding structure is provided between the lower wall (17) or the drain cup (19) of the main body (1) and the strainer (20) to prevent the strainer (20) from separating from the drain cup (19). And
The holding structure engages with the locking portion (54) provided on the lower wall (17) or drain cup (19) of the main body (1) and the locking portion (54) provided on the strainer (20). It is composed of a hook piece (55) and
At least a pair of projecting pieces (49) facing each other with the center of the strainer (20) sandwiched between them are configured to be elastically deformable, and each of the pair of projecting pieces (49) is provided with a hook piece (55). The drainage structure of the refrigerator is characterized by its presence. The drain cup (19) has a cup-shaped cup portion (25) having an upper surface opened by a cup bottom wall (23) and a cup peripheral wall (24) extending upward from the peripheral edge of the cup bottom wall (23). Equipped with
A locking portion (54) is provided on the inner peripheral surface of the cup peripheral wall (24) of the cup portion (25) so as to project inward, and outwardly on the outer surface of the projectile (49) configured to be elastically deformable. The drainage structure of the refrigerator according to claim 1, wherein the hook piece (55) is provided so as to project from the refrigerator. The strainer (20) is made of a resin molded product.
The refrigerator body (1) is composed of an outer box (5) and an inner box (6) made of a metal plate material, and a heat insulating material (7) filled between both boxes (5.6).
The drain cup (19) is fixed to a through hole (18) opened so as to penetrate the lower wall (17) inward and outward.
A circumferential reinforcing wall (56) for reinforcement bent toward the outer box (5) is formed on the peripheral portion of the through hole (18) in the inner box (6).
By inserting the reinforcing wall (56) into the upper side of the cup peripheral wall (24) of the drain cup (19), the reinforcing wall (56) is locked so as to project inward to the inner peripheral surface of the cup peripheral wall (24). The drainage structure of the refrigerator according to claim 2, which is configured to also serve as a unit (54). The second strainer portion (41) is outward from the upper edge of the strainer bottom wall (45), the lower narrowed strainer peripheral wall (46) surrounding the bottom wall (45), and the peripheral wall (46). It is formed in a dish shape with a flange seat (47) formed overhanging.
The drainage structure of a refrigerator according to any one of claims 1 to 3, wherein a dome portion (43) formed in a protruding curved shape is provided in the central portion of the bottom wall (45) of the strainer.

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