CN111380269B

CN111380269B - Drainage structures and horizontal freezer

Info

Publication number: CN111380269B
Application number: CN201811632592.3A
Authority: CN
Inventors: 廉锋; 李大伟; 刘越; 潘自杰; 刘英志; 马光超
Original assignee: Qingdao Haier Special Refrigerator Co Ltd
Current assignee: Qingdao Haier Special Refrigerator Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2023-07-07
Anticipated expiration: 2038-12-29
Also published as: CN111380269A

Abstract

The invention provides a drainage structure and a horizontal refrigerator, wherein the horizontal refrigerator comprises a box shell and an inner container, the inner container is arranged in the box shell, and the drainage structure comprises: the water receiving box is arranged in the inner container; the evaporation dish is arranged in the compressor bin of the case and is fixed on the case bottom plate of the case; the partition board is arranged in the compressor bin and is positioned between the water receiving box and the evaporation dish; the drain pipe assembly is communicated with the water receiving box and the evaporation dish and comprises a drain connecting pipe; the liner comprises a liner bottom plate, wherein the liner bottom plate forms a step part, and the step part is positioned between the water receiving box and the partition plate; the drainage connecting pipe is positioned between the step part and the partition plate; the inner container is internally provided with an evaporator and a fan set, the evaporator and the fan set are arranged above the water receiving box, the water receiving box is provided with a water outlet, and the water outlet is correspondingly positioned at the end part of the evaporator far away from the fan set.

Description

Drainage structures and horizontal freezer

Technical Field

The invention relates to the technical field of refrigeration, in particular to a horizontal refrigerator with a drainage structure.

Background

The horizontal refrigerator is a refrigeration device for keeping constant low temperature, is an electrical appliance for preserving food or other articles at low temperature and is widely applied to the fields of business and household.

At present, the refrigeration principle according to the horizontal refrigerator is generally divided into a direct-cooling horizontal refrigerator and an air-cooling horizontal refrigerator. The direct-cooling horizontal refrigerator is easy to cause the problem of frost formation in the refrigerator in the use process, accumulated water formed after frost formation in the refrigerator is melted needs to be discharged, and a drain hole is arranged at the bottom of an inner container in the refrigerator generally, so that the accumulated water is directly discharged to the external environment. The air-cooled horizontal refrigerator directly sends cold air into the refrigerator through the refrigerating equipment, so that the refrigerator has the advantage of no frosting in the refrigerator, however, the surface of an evaporator in the refrigerating equipment is frosted, so that the evaporator needs to be subjected to defrosting treatment regularly, and defrosting water formed by defrosting is often discharged into the external environment directly through a drain pipe.

The mode of directly discharging accumulated water or defrosting water into the environment not only affects the use environment, but also seriously affects the use physical examination of clients.

In view of the above, the invention provides a novel drainage structure suitable for an air-cooled horizontal refrigerator and the horizontal refrigerator.

Disclosure of Invention

The invention aims to provide a drainage structure and a horizontal refrigerator using the drainage structure, which are used for draining defrosting water generated during the operation of the horizontal refrigerator into an evaporation dish in a compressor bin for evaporation through the drainage structure, and solve the problems that the defrosting water is directly discharged into the environment, the environment is polluted and the use experience is influenced in the prior art.

The invention provides a drainage structure, which is suitable for a horizontal refrigerator, wherein the horizontal refrigerator comprises a box shell and an inner container, the inner container is arranged in the box shell, and the drainage structure comprises: the water receiving box is arranged in the inner container; the evaporation dish is arranged in the compressor bin of the case and is fixed on the case bottom plate of the case; the partition board is arranged in the compressor bin and is positioned between the water receiving box and the evaporation dish; the drain pipe assembly is communicated with the water receiving box and the evaporation dish and comprises a drain connecting pipe; the liner comprises a liner bottom plate, wherein the liner bottom plate forms a step part, and the step part is positioned between the water receiving box and the partition plate; the drainage connecting pipe is positioned between the step part and the partition plate; wherein, set up evaporimeter and fan group in this inner bag, this evaporimeter and this fan group set up this water receiving box top, and this water receiving box has the outlet, and this outlet corresponds and is located the tip that this fan group was kept away from to this evaporimeter.

As an alternative technical scheme, the drainage connecting pipe is of a conical structure.

As an optional technical scheme, the water receiving box comprises a first bottom surface and a side wall, the side wall protrudes from the first bottom surface, the first bottom surface is provided with a lowest position, and the side wall is provided with the water outlet corresponding to the lowest position, so that the defrosting water in the water receiving box is collected at the lowest position and then discharged into the water discharging pipe assembly from the water outlet.

As an alternative solution, the fan set is adjacent to a first side of the water receiving box, the water outlet is adjacent to a second side of the water receiving box, and the first side is opposite to the second side.

As an optional technical solution, the first bottom surface further includes a first inclined surface, the first inclined surface is located at one side of the lowest position, and the first inclined surface is inclined downwards from the first side edge of the water receiving box toward the lowest position.

As an optional technical scheme, the first inclined plane includes a diversion trench, the diversion trench divides the first inclined plane into a first area and a second area, the first area is inclined from a third side edge of the water receiving box towards the diversion trench, the second area is inclined from a fourth side edge of the water receiving box towards the diversion trench, the third side edge is opposite to the fourth side edge, and the diversion trench is communicated with the lowest position.

As an optional technical scheme, the drain pipe assembly further comprises a corrugated pipe, the corrugated pipe is arranged on one side, far away from the step portion, of the partition board, and the corrugated pipe is communicated with the drain connecting pipe and the water injection hole in the evaporation pan.

As an optional technical scheme, the water injection hole protrudes from the second bottom surface of the evaporation dish, the water injection hole comprises an annular side wall and a positioning piece, the annular side wall is arranged around the positioning piece, one end of the corrugated pipe is accommodated in the annular side wall and combined with the positioning piece, and a gap is formed between the end of the corrugated pipe and the second bottom surface by the positioning piece.

As an alternative technical scheme, a notch is arranged on the annular side wall and is communicated with the inner side and the outer side of the annular side wall.

The invention also provides a horizontal refrigerator, which comprises a drainage structure, wherein the drainage structure is the drainage structure.

As an alternative technical scheme, the horizontal refrigerator is an air-cooled horizontal refrigerator.

Compared with the prior art, the horizontal refrigerator with the drainage structure has the advantages that the drain pipe assembly obliquely penetrates through the step part of the inner container and the machine cabin partition plate to be communicated with the water receiving box in the inner container and the evaporation pan in the compressor cabin of the box shell, so that the problem that defrosting water is not easy to drain due to the fact that the position of the drain box in the inner container is higher than that of the evaporation pan of the compressor cabin is avoided, and physical examination of users is improved.

The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.

Drawings

Fig. 1 is a schematic view of a part of the structure of a horizontal refrigerator provided by the invention.

Fig. 2 is a schematic view of the horizontal refrigerator of fig. 1 with parts omitted.

Fig. 3 is an assembled schematic view of the drainage structure of the present invention.

Fig. 4 is an exploded view of the drainage structure of the present invention.

Fig. 5 is a schematic view of the structure of the evaporating dish in the drainage structure of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Fig. 1 is a schematic view of a part of the structure of a horizontal refrigerator provided by the invention; fig. 2 is a schematic view of the horizontal refrigerator of fig. 1 with parts omitted.

As shown in fig. 1 and 2, the horizontal refrigerator 100, in particular, an air-cooled horizontal refrigerator, comprises a case 10 and a liner 20 embedded in the case 10, wherein an insulation layer (not shown) is filled between the case 10 and the liner 20. Transparent glass door bodies (not shown) are arranged at the top parts of the case 10 and the inner container 20, the glass door bodies are combined in the track 101, the glass door bodies can slide left and right in the track 101 to open or close the glass door bodies, and the track 101 is sealed at the top parts of the case 10 and the inner container 20.

The liner 20 is provided with a liner bottom plate 22 which is bent to form a step part 21, the partition plate 12 is arranged on one side of the step part 21 facing the case 10, and the partition plate 12 is positioned in the compressor compartment 13 of the case 10; wherein the step portion 21 and the partition 12 are respectively in a right-angle structure. One end of the partition plate 12 is fixed to the case bottom plate 11 of the case 10.

It should be noted that, in the horizontal refrigerator 100 shown in fig. 1, the front side and the left and right side walls of the case 10 are removed, and the back side wall is located on the side far from the user in the horizontal refrigerator 100 for more clear illustration. In other words, the viewing angle direction of the horizontal refrigerator 100 in fig. 1 is the front side of the horizontal refrigerator 100.

In fig. 2, the partition 12 and part of the side walls of the liner 20 and the liner bottom plate 22 in fig. 1 are omitted for clarity of illustration.

Referring to fig. 1 and 2, in the horizontal refrigerator 100, the water receiving box 30 is located at one side of the stepped portion 21, the drain connection pipe 50 in the drain pipe assembly is located between the stepped portion 21 and the partition 12, and the evaporation pan 40 is located at one side of the partition 12 away from the stepped portion 21. Wherein, the partition 12 and the step 21 are provided with corresponding openings corresponding to the first end 51 and the second end 52 of the drain connection pipe 50, respectively, so that the drain connection pipe 50 can communicate the water receiving box 30 with the evaporation pan 40 through the openings, and the defrost water in the water receiving box 30 is discharged towards the evaporation pan 40. Wherein, the above-mentioned opening on the step portion 21 of the liner 20 is slightly higher than the above-mentioned opening on the partition plate 12 in the compressor bin 13, so that the drain connection pipe 50 is inclined from the first end portion 51 toward the second end portion 52, and meanwhile, the structure that the water receiving box 30 is higher than the evaporation pan 40 in the horizontal refrigerator 100 is utilized, so that the defrost water is smoothly discharged into the evaporation pan 40 in the compressor bin 13. In this embodiment, the evaporating dish 40 is fixed to the bottom plate 11 of the case in a region corresponding to the compressor compartment 13.

In addition, the cover plate 80, the evaporator 60 and the water receiving box 30 are disposed on the side of the step portion 21 facing the liner 20, wherein the cover plate 80, the evaporator 60 and the water receiving box 30 are sequentially stacked from top to bottom (from the top of the liner 20 to the bottom of the liner 20). In the process of forming cool air, the evaporator 60 may frost on the coils and fins inside, and meanwhile, a heating pipe (not shown) is embedded in the bottom of the evaporator 60, and heats for a certain period of time to melt the frost, and the frost water formed after the frost melting drops into the water receiving box 30.

The water receiving box 30, the water discharging pipe assembly and the evaporation pan 40 together constitute a water discharging structure of the present invention, and the water discharging structure will be described in detail with reference to fig. 3 to 5.

FIG. 3 is an assembled schematic view of the drainage structure of the present invention; FIG. 4 is an exploded view of the drainage structure of the present invention; fig. 5 is a schematic view of the structure of the evaporating dish in the drainage structure of the present invention.

As shown in fig. 3 to 5, the water receiving box 30 is located below the evaporator 60, and a water receiving box heat insulation layer 310 is disposed below the water receiving box 30, that is, the water receiving box 30 is stacked on the water receiving box heat insulation layer 310; the water receiving box 30 is, for example, an aluminum water receiving box, and the heat insulating layer 310 of the water receiving box has a similar bottom structure to the water receiving box 30, so that the water receiving box 30 is stacked on the heat insulating layer 310.

The water receiving box 30 has a first bottom surface 31 and a side wall 32, the first bottom surface 31 has a lowest position, the side wall 32 protrudes from the first bottom surface 31, for example, protrudes toward the evaporator 60, and the side wall 32 is provided with a drain opening 33 corresponding to the lowest position. That is, the defrost water in the water receiving box 30 is collected at the lowest position of the first bottom surface 31, and flows from the lowest position to the drain opening 33. In this embodiment, the drain port 33 extends toward the outside of the sidewall 32 and is accommodated in the drain connection pipe 50. Preferably, the drain opening 33 may be considered as an extension of the lowest position of the first bottom surface 31 towards the outside of the side wall 32, i.e. the drain opening 33 is also substantially located at the lowest position.

The first bottom surface 31 includes a first inclined surface 34, the first inclined surface 34 being located at one side of the lowest position of the first bottom surface 31, the first inclined surface 34 being inclined downward from the first side 301 of the water receiving box 30 toward the lowest position of the first bottom surface 31.

As shown in fig. 3 and 4, the drain opening 33 is adjacent to a second side 302 of the water receiving box 30, corresponding to the end of the evaporator 60 remote from the fan set 70, and the fan set 70 is adjacent to a first side 301 of the water receiving box 30, the first side 301 being opposite the second side 302. In this embodiment, the first bottom surface 31 of the water receiving box 30 is substantially inclined from the first side 301 toward the second side 302, and the lowest position on the first bottom surface 31 is adjacent to the second side 302. Preferably, the lowest position of the first bottom surface 31 is located at a position of the side wall 32 near the second side edge 302; and the drain opening 33 is substantially disposed at the junction of the side wall 32 and the second side edge 302.

It should be noted that, when air in the external environment flows backward into the evaporator chamber of the liner 20 through the water outlet 33, the water outlet 33 of the water receiving box 30 corresponds to the end of the evaporator 60 away from the fan set 70, so that the air flows backward into the evaporator 60 first, and the evaporation treatment of the evaporator 60 is performed, so that the vapor in the backward air does not affect the fan set 70 at the far end, that is, the fan set 70 is not frozen due to the vapor, which affects the normal operation of the horizontal refrigerator 100, and the service life is prolonged. Further, by the above adjustment of the drain opening 33, it is also possible to eliminate the need to form a liquid seal in the water filling hole 42 in the evaporation pan 40. Wherein, the liquid seal is formed in the water injection hole 42 for preventing the air from flowing backward from the water injection hole 42 to the water discharge hole 33 caused by the uneven pressure inside and outside the box body in the horizontal refrigerator 100.

In addition, in the horizontal refrigerator 100, the evaporator 60 is disposed to be inclined in such a direction that the end of the evaporator 60 away from the fan group 70 is lower than the end of the evaporator 60 close to the fan group 70.

As can be seen from the above description of the view angle of fig. 1, the fan set 70 is disposed near the back side of the horizontal refrigerator 100, and the evaporator 60 is disposed near the front side of the horizontal refrigerator 100, so that the above-mentioned inclined placement of the evaporator 60 can also be regarded as an inclination of "front low and rear high".

As shown in fig. 3, a diversion trench 341 is disposed in the middle area of the first inclined surface 34, one end of the diversion trench 341 is communicated with the first concave portion 31, the diversion trench 341 divides the first inclined surface 34 into a first area 342 and a second area 343, preferably, the first area 342 and the second area 343 are symmetrically disposed along the diversion trench 341, i.e. the first area 342 is inclined downwards from the third side 303 of the water receiving box 30 towards the diversion trench 341, the second area 343 is inclined downwards from the fourth side 304 of the water receiving box 30 towards the diversion trench 341, the diversion trench 341 is located at the lowest position of the first inclined surface 34, and the diversion trench 341 is communicated with the lowest position of the first bottom surface 31. When the defrost water generated in the evaporator 60 enters the first inclined surface 34, the defrost water is collected from the first and second regions 342 and 332 toward the diversion trench 341, flows into the lowest position of the first bottom surface 31 from one end of the diversion trench 341, and is discharged through the drain opening 33.

The first side 301 and the second side 302 of the water receiving box 30 are parallel and opposite, the third side 303 and the fourth side 304 are parallel and opposite, and the first side 301 and the second side 302 are respectively located between the third side 303 and the fourth side 304. In the present embodiment, the side wall 32 is located on the fourth side 304 of the water receiving box 30, and the fourth side 304 is adjacent to the step 21, i.e., the side wall 32 is adjacent to the step 21.

In addition, the lower part of the water receiving box 30 is overlapped with the water receiving box heat insulating layer 310, and the shape of the water receiving box heat insulating layer 310 is approximately similar to that of the water receiving box 30, except that the position of the water receiving box heat insulating layer 310 corresponding to the water discharging opening 33 of the water receiving box 30 is an opening, and the water discharging opening 33 is positioned in the opening and extends outwards from the opening.

As shown in fig. 3 to 5, the evaporation pan 40 has a substantially L-shaped structure and includes a second bottom surface 42, a water injection hole 42 and a side wall 43, wherein the water injection hole 42 protrudes from the second bottom surface 42, the water injection hole 42 corresponds to a bellows 51 of the drain pipe assembly, and one end of the bellows 51 is accommodated in the water injection hole 42; the side wall 43 is disposed around the second bottom surface 42, and a space between the side wall 43 and the second bottom surface 42 is a water storage space 44.

As shown in fig. 5, the water injection hole 42 includes an annular sidewall 421, the annular sidewall 421 extending upward from the second bottom surface 42, the extending direction of the annular sidewall 421 being the same as the extending direction of the sidewall 43 disposed around the second bottom surface 42; the space inside the annular sidewall 421 is a water inlet space 424, the annular sidewall 421 is provided with a notch 422, the notch 422 and the water inlet space 424 are mutually communicated, wherein one end of the bellows 51 is accommodated in the water inlet space 424, and the defrosting water discharged from the bellows 51 enters the water inlet space 424 and overflows from the notch 422 to the water storage space 44.

The annular side wall 421 is arranged around the positioning piece 423, or the positioning piece 423 is arranged in the water inlet space 424, the positioning piece 423 comprises a clamping structure 4231 and a stop structure 4232, and the stop structure 4232 is positioned between the clamping structure 4231 and the bottom of the water injection hole 42; the locking structure 4231 is used for positioning the end of the corrugated tube 51 accommodated in the water inlet space 424, and preventing the corrugated tube 51 from falling out of the water injection hole 42; the stopper 4232 serves to prevent the end of the bellows 51 from contacting the bottom of the water injection hole 42, resulting in poor drainage. In this embodiment, the bottom of the water injection hole 42 is the second bottom 42 of the evaporation pan 40.

Preferably, the locking structure 4231 and the stop structure 4232 are integrally formed, the locking structure 4231 comprises a locking edge, the stop structure 4232 comprises a stop edge, and the end of the stop edge protrudes out of the end of the locking edge. Further, a space is formed between the end of the engaging edge and the inner side of the annular side wall 421, and the wall of the tube accommodating the bellows 51 is located in the space. In the present embodiment, the end of the stop edge is connected with the inner side of the annular sidewall 421, but not limited thereto. In other embodiments of the invention, the end of the stop edge may not be connected to the inside of the annular sidewall, the stop edge merely being required to provide a gap between the end of the bellows and the bottom of the fill hole or the second bottom surface of the evaporation pan.

In this embodiment, the bottom edge 4221 of the notch 422 is higher than the bottom of the water filling hole 42, i.e. the bottom edge 4221 is higher than the second bottom surface 41, i.e. the notch 422 does not extend onto the second bottom surface 41. The bottom edge 4221 of the notch 422 is higher than the second bottom surface 42, so that all the defrosting water cannot overflow from the water injection hole 42 into the water storage space 44, that is, the part of the water injection hole 42 close to the second bottom surface 42 can remain part of the defrosting water, and the remaining defrosting water can form a liquid seal, so that the problem that air in the external environment flows back into the evaporator chamber due to inconsistent air pressure inside and outside the box in the horizontal refrigerator 100 can be relieved.

It should be noted that the arrangement of the bottom edge 4221 of the notch 422 on the annular sidewall 421 higher than the second bottom surface 41 is not a necessary design. In the present invention, since the drain port 33 of the water receiving box 30 is disposed corresponding to the end of the evaporator 60 remote from the fan unit 70, the bottom edge 4221 of the notch 422 on the annular sidewall 421 may extend to the bottom of the water filling hole 42, or the notch 422 on the annular sidewall 421 may extend to the second bottom surface 41 of the evaporating dish 40. When the notch 422 extends to the bottom of the water filling hole 42 or the second bottom surface 41, the water filling hole 42 is not sealed with liquid, and the air is flowed backward, the position of the water outlet 33 on the water receiving box 30 is overcome.

In an embodiment of the present invention, in order to increase the evaporation rate of the defrosting water, a heating element 45 (as shown in fig. 2) may be further disposed in the water storage space 44 of the evaporation pan 40, wherein the heating element 45 is, for example, a continuously bent heating tube.

In addition, the evaporation pan 40 may further include an extension tank 46, where the extension tank 46 is in communication with the water storage space 44, and the extension tank 46 is configured to receive condensed water on a glass door (not shown) at the top of the horizontal refrigerator 100, and the condensed water is discharged into the extension tank 46 of the evaporation pan 40 through a condensed water pipe and evaporated. In this embodiment, the water injection hole 42 is located in the extension groove 46, and the extension groove 46 is located near the front side of the horizontal refrigerator 100, where the front side is located near the user.

Further, the water receiving box 30 is communicated with the evaporating dish 40 through a drain pipe assembly.

The drain pipe assembly includes a drain connection pipe 50 and a bellows 51 which are communicated with each other, the drain connection pipe 50 being located between the stepped portion 21 and the partition 12, the bellows 51 being located on a side of the partition 12 remote from the stepped portion 21. The drain connection pipe 50 has a tapered structure, and includes a first connection end 51 and a second connection end 52, and the pipe diameter gradually decreases from the first connection end 51 toward the second connection end 52. Wherein, the drain opening 33 is accommodated in the first connecting end 51, and the other end of the bellows 51 is accommodated in the second connecting end 52.

As shown in fig. 1 to 5, the flow direction of the defrosting water in the horizontal refrigerator 100 is from the lowest position of the first bottom surface 31 of the water receiving box 30, is discharged into the water discharge connecting pipe 50 and the corrugated pipe 51 through the water discharge opening 33, and flows out from the water injection hole 42 in the evaporating dish 40; wherein, the water receiving box 30 is disposed on the water receiving box heat insulation layer 310, the water receiving box heat insulation layer 310 is disposed on the liner bottom plate 22, the evaporation pan 40 is disposed on the case bottom plate 41, and an insulation layer is additionally disposed between the liner bottom plate 22 and the case bottom plate 41, so that the water outlet 33 is higher than the water injection hole 42, and the drain pipe assembly is disposed through the step portion 21 of the liner 20 and the partition plate 12 in the compressor bin 13, so that the defrosting water in the water receiving box 30 is smoothly discharged into the water storage space 44 of the evaporation pan 40, and the defrosting water is evaporated by using heat generated by the compressor in the compressor bin 13 and/or heat generated by the heating element 45 in the water storage space 44 of the evaporation pan 40.

In summary, the invention provides a horizontal refrigerator with a drainage structure, a drain pipe assembly penetrates through a step part of an inner container and a partition plate of a compressor bin to be communicated with a water receiving box in the inner container and an evaporation dish in the compressor bin of a box shell, and frost water is smoothly discharged from the water receiving box to the evaporation dish to be evaporated by utilizing the height difference between the water receiving box and the evaporation dish, so that the problem that the conventional refrigerator directly discharges water to the external environment to influence the use experience of customers is solved, wherein a drain outlet on the water receiving box corresponds to the end part of an evaporator far away from a fan unit, a liquid seal is prevented from being formed in a water injection hole of the evaporation dish, and meanwhile, the problem that air flows backwards into an evaporator cavity of a box body is solved. In addition, connect water box, evaporating dish and drain pipe subassembly all set up in the inside of case shell, also make the outward appearance of horizontal freezer more pleasing to the eye.

Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The drain structure is suitable for horizontal refrigerator, and the horizontal refrigerator includes one casing and one inner container inside the casing,

the drainage structure includes:

the water receiving box is arranged in the inner container;

the evaporation dish is arranged in the compressor bin of the case and is fixed on the case bottom plate of the case;

the partition board is arranged in the compressor bin and is positioned between the water receiving box and the evaporation dish; and

the drain pipe assembly is communicated with the water receiving box and the evaporation dish and comprises a drain connecting pipe;

the liner comprises a liner bottom plate, wherein the liner bottom plate forms a step part, and the step part is positioned between the water receiving box and the partition plate; the drainage connecting pipe is positioned between the step part and the partition plate;

wherein, the inner container is provided with an evaporator and a fan set, the evaporator and the fan set are arranged above the water receiving box, the water receiving box is provided with a water outlet, and the water outlet is correspondingly positioned at the end part of the evaporator far away from the fan set;

the water receiving box comprises a first bottom surface and a side wall, wherein the side wall protrudes from the first bottom surface, the first bottom surface is provided with a lowest position, and the side wall is provided with a water outlet corresponding to the lowest position, so that the defrosting water in the water receiving box is collected at the lowest position and then discharged into the water discharging pipe assembly from the water outlet;

the fan set is adjacent to a first side of the water receiving box, the water outlet is adjacent to a second side of the water receiving box, and the first side is opposite to the second side.

2. The drainage structure of claim 1 wherein,

the drainage connecting pipe is of a conical structure.

3. The drainage structure of claim 1 wherein,

the first bottom surface also comprises a first inclined surface which is positioned at one side of the lowest position and is inclined downwards from the first side edge of the water receiving box towards the lowest position.

4. The drainage structure of claim 3 wherein,

the first inclined plane comprises a diversion trench, the diversion trench divides the first inclined plane into a first area and a second area, the first area inclines from a third side edge of the water receiving box towards the diversion trench, the second area inclines from a fourth side edge of the water receiving box towards the diversion trench, the third side edge is opposite to the fourth side edge, and the diversion trench is communicated with the lowest position.

5. The drainage structure of claim 1 wherein,

the drain pipe assembly further comprises a corrugated pipe, the corrugated pipe is arranged on one side, far away from the step portion, of the partition board, and the corrugated pipe is communicated with the drain connecting pipe and the water injection hole in the evaporation pan.

6. The drainage structure of claim 5 wherein,

the water injection hole protrudes from the second bottom surface of the evaporation dish, the water injection hole comprises an annular side wall and a positioning piece, the annular side wall is arranged around the positioning piece, one end of the corrugated pipe is accommodated in the annular side wall and combined with the positioning piece, and a gap is reserved between the end part of the corrugated pipe and the second bottom surface.

7. The drainage structure of claim 6 wherein,

the annular side wall is provided with a notch which is communicated with the inner side and the outer side of the annular side wall.

8. A horizontal refrigerator comprises a drainage structure, and is characterized in that,

the drainage structure is as claimed in any one of claims 1 to 7.

9. The horizontal refrigerator of claim 8 wherein,

the horizontal refrigerator is an air-cooled horizontal refrigerator.