CN216557889U - Drain pipe assembly and refrigerator - Google Patents

Drain pipe assembly and refrigerator Download PDF

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Publication number
CN216557889U
CN216557889U CN202122783713.8U CN202122783713U CN216557889U CN 216557889 U CN216557889 U CN 216557889U CN 202122783713 U CN202122783713 U CN 202122783713U CN 216557889 U CN216557889 U CN 216557889U
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CN
China
Prior art keywords
drain
drain pipe
section
assembly
refrigerator
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Application number
CN202122783713.8U
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Chinese (zh)
Inventor
程莎莎
徐志国
杨发林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Refrigerator Co Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Refrigerator Co Ltd
Haier Smart Home Co Ltd
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Application filed by Qingdao Haier Refrigerator Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Refrigerator Co Ltd
Priority to CN202122783713.8U priority Critical patent/CN216557889U/en
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Publication of CN216557889U publication Critical patent/CN216557889U/en
Priority to PCT/CN2022/117154 priority patent/WO2023082802A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14Collecting or removing condensed and defrost water; Drip trays

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Removal Of Water From Condensation And Defrosting (AREA)

Abstract

The utility model provides a drain pipe assembly, which comprises a drain pipe body and a floating ball arranged in the drain pipe body, wherein the diameter of the floating ball is d 1; the upper part of the drain pipe body is provided with a drain port, and the lower part of the drain pipe body is provided with a drain hole. Wherein the drain body has a first straight bore section with an inner diameter D1 and a second straight bore section with an inner diameter D2, and D2< D1< D1. According to the utility model, the floating ball is arranged in the drain pipe body, so that on one hand, when no water is accumulated in the drain pipe body, external heat load is prevented from entering the refrigerator, and on the other hand, when the floating ball is arranged in the refrigerator compartment and is in a negative pressure state, and in a state that a liquid seal is not formed, the floating ball can float upwards through door opening pressure, so that pressure balance between the inside and the outside of the refrigerator compartment is realized; and when water is accumulated in the drain pipe body, a liquid seal is formed at the drain hole, so that external heat load is prevented from entering the refrigerator, and the problems of frosting and icing in the refrigerator are avoided.

Description

Drain pipe assembly and refrigerator
Technical Field
The utility model relates to the technical field of refrigerators, in particular to a drain pipe assembly and a refrigerator.
Background
The drain pipe of the refrigerator penetrates through the inner container, the foaming layer and the bottom steel plate of the refrigerator and is used for draining defrosting water, condensed water and the like generated in the refrigerator to the outside of the refrigerator body. In prior art, the straight tube formula design is adopted mostly to the refrigerator drain pipe, but when the drainage end after, the cold volume of storing in the refrigerator can overflow outside the box through the drain pipe, and the outer high humid air of refrigerator also can get into the refrigerator through the drain pipe simultaneously in, can lead to the frosting of refrigerator serious to influence the refrigeration performance of refrigerator, increase the energy consumption.
Disclosure of Invention
The utility model provides a drain pipe assembly to solve the technical problems.
In order to achieve one of the above objectives of the present invention, an embodiment of the present invention provides a drain pipe assembly, which includes a drain pipe body and a floating ball with a diameter d1 disposed in the drain pipe body, wherein a drain port is disposed at an upper portion of the drain pipe body, and a drain hole is formed at a lower portion of the drain pipe body, and the drain hole is also a water outlet of the drain pipe assembly; wherein the drain body has a first straight bore section with an inner diameter D1 and a second straight bore section with an inner diameter D2, and D2< D1< D1.
As a further improvement of the above technology, the drain pipe body further includes a drain hole section provided at a lower end of the second straight hole section, wherein the drain hole section includes a tapered drain section and a straight hole drain section located at a lower end of the tapered drain section.
As a further improvement of the above technology, the inner diameter of the straight hole drainage section is 3 mm.
As a further improvement of the technology, the drain pipe assembly further comprises a drain interface section arranged at the upper end of the first straight hole section, and the drain interface section is further provided with a sealing ring used for being connected with a drain outlet of a refrigerator body.
As a further improvement of the above technology, the drain pipe assembly further includes an exhaust valve disposed on a side surface of the drain pipe body, wherein the exhaust valve includes an exhaust valve body, an exhaust pipe connected between the exhaust valve body and the drain pipe body, and a sealing ball disposed in the exhaust valve body, and the exhaust pipe is connected to an upper middle portion of the first straight hole section.
As a further improvement of the technology, the sealing ball is a light hollow ball.
As a further improvement of the above technology, the exhaust pipe is disposed in an upward inclined manner, that is, the joint of the exhaust pipe and the drain pipe body is lower than the joint of the exhaust pipe and the exhaust valve body.
As a further improvement of the above technology, the exhaust valve body comprises a tapered hole section and a third straight hole section located at the upper part of the tapered hole section, and the upper part of the third straight hole section has an opening provided with a sealing cover to realize the opening or closing of the opening.
As a further improvement of the above technology, the drain pipe body is at least provided with a group of the exhaust valves, and when the drain pipe body is provided with a plurality of groups of the exhaust valves, the exhaust valves are arranged at intervals along the circumferential direction of the first straight hole section.
In order to achieve one of the above purposes of the present invention, an embodiment of the present invention further provides a refrigerator, where the refrigerator includes a box liner and the above drain pipe assembly, and the box liner extends to form a box drain outlet; wherein the drain interface of the drain pipe assembly is connected with the drain outlet of the tank body.
Compared with the prior art, the floating ball is arranged in the drain pipe body, so that on one hand, when no water is accumulated in the drain pipe body, namely, a liquid seal cannot be formed, the external heat load is prevented from entering the refrigerator; on the other hand, when the interior of the refrigerator compartment is in a negative pressure state, the floating ball can float up through the door opening pressure under the state that a liquid seal is not formed, and then the interior and the exterior of the refrigerator compartment are communicated through the drain pipe body, so that the pressure balance between the interior and the exterior of the refrigerator compartment is realized; moreover, when the defrosting water or the condensed water in the drain pipe body is more, the floating ball floats upwards under the buoyancy action of the defrosting water and the condensed water, so that the connecting hole between the first straight hole section and the second straight hole section is opened, and the defrosting water or the condensed water is quickly discharged; and when this internal ponding of drain pipe, can form the liquid seal in drain pipe hole department, and then realize the dual shutoff to the drain pipe body to avoid the loss of cold volume in the refrigerator, also can avoid external heat load to pass through in the drain pipe subassembly gets into the refrigerator simultaneously, can effectively reduce the problem emergence of frosting, freezing in the refrigerator.
Drawings
Fig. 1 is a perspective view illustrating a drain pipe assembly according to a first embodiment of the present invention.
Fig. 2 is an internal structural view of the drain pipe assembly of fig. 1.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
Fig. 4 is a partially enlarged view at B in fig. 2.
Fig. 5 is a perspective view of a drain pipe assembly according to a second embodiment of the present invention.
Figure 6 is a top view of the drain assembly of figure 5.
Fig. 7 is a perspective view illustrating a connection relationship of a drain pipe assembly in a refrigerator according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "front", "rear", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example one
As shown in fig. 1 and 2, the present invention provides a drain pipe assembly 100, wherein the drain pipe assembly 100 comprises a drain pipe body 120 and a floating ball 121 with a diameter d1 and arranged in the drain pipe body 120. A drain interface 122 is disposed on the upper portion of the drain pipe body 120, and a drain hole 123 is formed on the lower portion of the drain pipe body 120, where the drain hole 123 is a water outlet of the drain pipe assembly 100.
Further, the drain body 120 includes a first straight section 124 having an inner diameter D1, a second straight section 125 having an inner diameter D2, and a transition section 126 formed between the first and second straight sections 124, 125; and D2< D1< D1. Wherein, a connecting hole 1261 for connecting the first straight hole section 124 and the second straight hole section 125 is formed in the filtering section 126.
In the use process of the drain pipe assembly 100, when no water is accumulated in the second straight hole section 125, that is, when a liquid seal cannot be formed, the floating ball 121 completely blocks the connecting hole 1261, so that the cold in the refrigerator is prevented from leaking out through the drain pipe assembly 100; and the floating ball 121 can be in a negative pressure state in the refrigerator compartment and is not in a liquid seal state, the floating ball 121 floats upwards through the door opening pressure, and then the inside and the outside of the refrigerator compartment are communicated through the drain pipe body 120, so that the pressure balance between the inside and the outside of the refrigerator compartment is realized.
Meanwhile, when defrosting water or condensed water in the refrigerator needs to be drained, the floating ball 121 moves upward to open the connecting hole 1261 under the buoyancy of water, so that the defrosting water or the condensed water flows into the second straight hole section and is drained through the drain hole. However, as the drainage process proceeds, the buoyancy applied to the floating ball 121 is gradually reduced, and when the buoyancy is smaller than the self-gravity of the floating ball 121, the floating ball moves downward until the connecting hole 1261 is completely sealed; at this time, a part of the residual water still exists in the second straight hole section 125 and cannot be discharged, and then stays at the water discharge hole 123, so that a liquid seal is formed under the action of the surface tension of the water. In conclusion, the cold energy in the refrigerator is prevented from leaking out through the drain pipe assembly by the sealing of the floating ball 121 and the liquid seal at the drain hole 123, and meanwhile, the external heat load can be effectively prevented from entering the refrigerator through the drain pipe assembly 100.
In other embodiments of the present invention, it is also possible to use only one of the above-mentioned blocking or liquid sealing of the floating ball, so as to avoid the loss of the cooling capacity in the refrigerator.
In an embodiment of the present invention, the floating ball 121 is a light hollow ball. When the refrigerator needs to drain, the floating ball 121 can be subjected to large buoyancy, so that the floating ball moves upwards, and water can be drained timely.
Optionally, the floating ball 121 may be made of a plastic material. The plastic floating ball has the advantages of simple forming, low cost and the like.
As shown in fig. 3, in an embodiment of the present invention, the drain pipe body 120 further includes a drain hole section 128 formed at a lower end of the second straight hole section 125. A drain hole 123 of the drain pipe assembly 100 is formed in the drain hole section 128. In the drainage pipe assembly 100, the drainage hole 123 has various structures, such as a straight hole type, a tapered counter-sunk hole type, and the like.
In this embodiment, the drainage hole 123 is a tapered counterbore. That is, the drain hole section 128 includes a tapered drain section 128a and a straight hole drain section 128b at a lower end of the tapered drain section 128 a. The upper end of the straight hole drainage segment 128b is connected with the small end of the conical drainage segment 128 a. The design of the conical counter bore can play a role in guiding flow, so that residual defrosting water or condensed water in the drain pipe assembly 100 can conveniently enter the straight hole drain section 128b, and then a liquid seal is formed under the action of surface tension, so that the loss of cold in the refrigerator is avoided.
Further, the inner diameter of the straight drainage segment 128b should not be too large, when the inner diameter is too large, the drainage hole 123 needs more water to fill, and since the gravity applied to the larger water drop is also correspondingly larger, the upper limit of the size of the water drop suspended by the surface tension of the water drop can be more easily approached, and at this time, the balance between the surface tension of the condensed water drop and the gravity can be easily broken by the external force (such as vibration), so that the condensed water drops.
Alternatively, when the inner diameter of the straight hole drainage section 128b is 3mm, not only the condensed water drops can stably stay at the straight hole drainage section 128b and are not easily dropped by an external force, but also the smooth drainage of the drainage pipe assembly 100 can be ensured.
In the use process of the drain pipe assembly, cold energy in the refrigerator often leaks from the connection between the drain pipe extending from the inner container of the refrigerator and the drain assembly, and therefore, as shown in fig. 4, in the present embodiment, a drain interface section 129 is formed at the upper end of the first straight hole section 124, the outer diameter of the drain interface section is smaller than that of the first straight hole section 124, and a drain interface 122 is formed inside the drain interface section 129. The drainage interface section 129 is further provided with a sealing ring 127 for connecting with a drainage outlet of the refrigerator body.
Wherein, a projection 1291 is further formed on the outer side of the drain connector section 129. And the seal ring 127 has an outer side wall 1271 and an inner side wall 1272. The outer sidewall 1271 mates with the protrusion 1291 and such that the protrusion 1291 snaps into the gap between the outer sidewall 1271 and the inner sidewall 1272.
In this embodiment, the sealing ring 127 is sleeved on the drainage port 122. When the drain pipe assembly 100 is installed, a drain pipe extending from the refrigerator body can be inserted into a hole formed by the inner side wall 1272 of the sealing ring 127, and at the moment, the inner side wall 1272 is elastically deformed, so that the drain pipe at the extending position of the refrigerator inner container is hermetically connected with the drain pipe assembly 100. Optionally, the sealing ring 127 is made of a rubber material.
In the use process of the refrigerator, when a user takes out articles in the refrigerator and closes the door and opens the door again, the external heat load enters the refrigerator when the door is opened last time, so that the pressure of the compartment is reduced, and pressure difference is formed between the compartment and the outside, which causes great labor for opening the door. Therefore, in one embodiment of the present invention, the drain pipe assembly 100 further includes a vent valve 140 disposed at a side of the drain pipe body 120. The exhaust valve 140 includes an exhaust valve body 141, an exhaust pipe 142 connected between the exhaust valve body 141 and the drain pipe body, and a sealing ball 143 disposed in the exhaust valve body 141.
In order to prevent the sealing ball 143 from entering the drain pipe body 120 from the exhaust valve 140, in this embodiment, the outer diameter of the sealing ball 143 is larger than the inner diameter of the exhaust pipe 142.
Further, in order to prevent water entering the drain pipe body 120 from entering the exhaust valve 140, the exhaust pipe 142 is connected to the middle upper portion of the first straight hole section 124. And the exhaust pipe 142 is provided in an upwardly inclined form. That is, the joint 1421 between the exhaust pipe 142 and the drain body is lower than the joint 1422 between the exhaust pipe 142 and the exhaust valve body 141.
In an embodiment of the present invention, the discharge valve body 141 includes a tapered bore section 1411 and a third straight bore section 1412 located at an upper portion of the tapered bore section 1411. The upper portion of the third straight bore section 1412 has an opening 1413. Wherein, a through hole 1415 connected with the outside is formed in the taper hole section 1411. And the sealing ball 143 may open or close the through hole 1415.
Further, a sealing cover 1414 is further disposed at the opening 1413 to realize the opening or closing of the opening 1413. The opening 1413 can be used to place or remove the sealing ball 143.
Optionally, the sealing ball 143 is a light hollow ball, and the sealing ball 143 can move under the action of the air pressure difference to open or close the through hole 1415 in the tapered hole section 1411, so as to adjust the air pressure difference between the inside and the outside of the refrigerator and reduce the door opening resistance.
Because the refrigerator is in the closed state, inside is the negative pressure state, opens the door and has certain degree of difficulty. When a user opens the door, the sealing ball 143 moves upwards under the action of the air pressure difference, so that the negative pressure value is reduced, and the door opening resistance is reduced. If the user does not need to open the door, the sealing ball 143 blocks the through hole 1415 in the conical hole section 1411, so that the loss of the cold energy of the refrigerator is avoided.
Example two
As shown in fig. 5 and 6, there is also provided a drain pipe assembly 200 in an embodiment of the present invention, which is different from the above-described embodiment: a plurality of sets of exhaust valves 240 are disposed on the side of the drain pipe body 220, and the exhaust valves 240 are spaced apart in the circumferential direction of the first straight section 224.
On the basis of the above embodiments, the present invention further provides a refrigerator 300, wherein the refrigerator 300 includes a cabinet liner and the drain pipe assembly 100 or 200 in the above embodiments.
Fig. 7 is a schematic view illustrating a connection relationship of the drain pipe assembly 100 in the refrigerator 300 according to an embodiment of the present invention. As shown in fig. 7, a tank drain pipe 310 extends from the tank liner, and the tank drain pipe 310 is connected to the drain port 122 of the drain pipe assembly 100 through a gasket 127, so that defrosted water or condensed water generated in the refrigerator is discharged through the drain pipe assembly 100.
In conclusion, the beneficial effects of the utility model are as follows: according to the utility model, the floating ball 121 is arranged in the drain pipe body 120, so that on one hand, when no water is accumulated in the drain pipe body 120, namely a liquid seal cannot be formed, external heat load is prevented from entering the refrigerator 300; on the other hand, when the floating ball 121 is in a negative pressure state in the refrigerator compartment, the floating ball can float up by the door opening pressure in a state that a liquid seal is not formed, and then the inside and the outside of the refrigerator compartment are communicated through the drain pipe body 120, so that the pressure balance between the inside and the outside of the refrigerator compartment is realized.
Moreover, when the defrosting water or the condensed water is much in the drain pipe body 120, the floating ball 121 floats upwards under the buoyancy of the defrosting water and the condensed water, and then the connecting hole 1261 between the first straight hole section 124 and the second straight hole section 125 is opened, so that the defrosting water or the condensed water is quickly discharged; and when having ponding in the drain pipe body 120, can form the liquid seal in straight hole drainage section 128b department, and then realize the dual shutoff to drain pipe body 120 to avoid the loss of cold volume in the refrigerator, also can avoid external heat load to pass through in the drain pipe subassembly gets into the refrigerator simultaneously, can effectively reduce the problem emergence that frosts, freezes in the refrigerator.
In addition, the side surface of the drain pipe body 120 is also provided with the exhaust valve 140, so that the air pressure difference in the refrigerator is changed, the resistance when the refrigerator is opened is reduced, the experience of a user is better, the whole structure is simple, the installation is convenient, and the cost is lower.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. A drain pipe assembly is characterized by comprising a drain pipe body and a floating ball with the diameter d1, wherein the floating ball is arranged in the drain pipe body; the upper part of the drain pipe body is provided with a drain interface, the lower part of the drain pipe body is provided with a drain hole, and the drain hole is a water outlet of the drain pipe assembly; wherein the drain body has a first straight bore section with an inner diameter D1 and a second straight bore section with an inner diameter D2, and D2< D1< D1.
2. The drain assembly of claim 1, wherein: the drain pipe body is characterized by further comprising a drain hole section arranged at the lower end of the second straight hole section, wherein the drain hole section comprises a conical drain section and a straight hole drain section positioned at the lower end of the conical drain section.
3. The drain assembly of claim 2, wherein: the internal diameter of straight hole drainage section is 3 mm.
4. The drain assembly of claim 1, wherein: the drain pipe assembly further comprises a drain interface section arranged at the upper end of the first straight hole section, and the drain interface section is further provided with a sealing ring used for being connected with a drain outlet of the refrigerator body.
5. The drain assembly of claim 1, further comprising a vent valve disposed in a side of the drain body, wherein the vent valve comprises a vent valve body, a vent tube connected between the vent valve body and the drain body, and a sealing ball disposed in the vent valve body, and wherein the vent tube is connected to an upper-middle portion of the first straight bore section.
6. The drain assembly of claim 5, wherein: the sealing ball is a light hollow ball.
7. The drain assembly of claim 5, wherein: the exhaust pipe is arranged in an upward inclined mode, namely the joint of the exhaust pipe and the drain pipe body is lower than the joint of the exhaust pipe and the exhaust valve body.
8. The drain assembly of claim 5, wherein: the exhaust valve body comprises a conical hole section and a third straight hole section positioned on the upper portion of the conical hole section, an opening is formed in the upper portion of the third straight hole section, and a sealing cover is arranged at the opening to achieve opening or closing of the opening.
9. The drain assembly of claim 5, wherein: the drain pipe body is at least provided with a set of discharge valve, works as when being provided with multiunit discharge valve on the drain pipe body, discharge valve follows the circumferencial direction interval of first straight hole section sets up.
10. A refrigerator comprising a cabinet liner and a drain assembly as claimed in any one of claims 1 to 9, said cabinet liner having a cabinet drain outlet extending therefrom; wherein the drain interface of the drain pipe assembly is connected with the drain outlet of the tank body.
CN202122783713.8U 2021-11-12 2021-11-12 Drain pipe assembly and refrigerator Active CN216557889U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202122783713.8U CN216557889U (en) 2021-11-12 2021-11-12 Drain pipe assembly and refrigerator
PCT/CN2022/117154 WO2023082802A1 (en) 2021-11-12 2022-09-06 Drainage pipe assembly and refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122783713.8U CN216557889U (en) 2021-11-12 2021-11-12 Drain pipe assembly and refrigerator

Publications (1)

Publication Number Publication Date
CN216557889U true CN216557889U (en) 2022-05-17

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CN202122783713.8U Active CN216557889U (en) 2021-11-12 2021-11-12 Drain pipe assembly and refrigerator

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WO (1) WO2023082802A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023082802A1 (en) * 2021-11-12 2023-05-19 青岛海尔电冰箱有限公司 Drainage pipe assembly and refrigerator

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Publication number Priority date Publication date Assignee Title
JPH0547784U (en) * 1991-11-29 1993-06-25 シャープ株式会社 Defrosting water drainage structure of refrigerator / freezer
CN102564017B (en) * 2012-02-22 2014-03-26 合肥美的电冰箱有限公司 Drain pipe component and refrigerator with same
CN203100327U (en) * 2013-01-17 2013-07-31 海尔集团公司 Drain-pipe assembly and refrigerator provided with same
CN204806795U (en) * 2015-06-12 2015-11-25 合肥华凌股份有限公司 Drain assembly and refrigerator
CN206469571U (en) * 2017-01-13 2017-09-05 南京创维家用电器有限公司 A kind of refrigerator drain assembly and refrigerator
CN110553457A (en) * 2018-05-31 2019-12-10 青岛海尔股份有限公司 Water and air discharging and air inlet composite pipe for refrigerator and refrigerator
CN212157820U (en) * 2020-03-31 2020-12-15 海信容声(广东)冷柜有限公司 Low-temperature storage device
CN216557889U (en) * 2021-11-12 2022-05-17 青岛海尔电冰箱有限公司 Drain pipe assembly and refrigerator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023082802A1 (en) * 2021-11-12 2023-05-19 青岛海尔电冰箱有限公司 Drainage pipe assembly and refrigerator

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