CN217900273U - Refrigerator and drain pipe for refrigerator - Google Patents

Abstract

The utility model provides a refrigerator and a drain pipe for the refrigerator; the drain pipe comprises an upper drain section, a liquid seal section, a lower drain section and a bypass pipe; the top end of the upper drainage section is communicated with a refrigeration chamber of the refrigerator; the bottom end of the liquid seal section is communicated with the bottom end of the upper drainage section; the top end of the lower drainage section is communicated with the top end of the liquid seal section, and the bottom end of the lower drainage section is communicated with the external environment; a first height position is formed at the bottom end of the inner side of the communication part between the lower drainage section and the liquid seal section; the bottom end of the by-pass pipe is connected with the lower part of the upper drainage section; the bypass pipe is communicated with the external environment; a second height position is formed at the top end of the inner side of the communication part between the bypass pipe and the upper drainage section; the second height position is lower than the first height position. When the air pressure in the refrigerating chamber is overlarge, the bypass pipe releases gas outwards; when the indoor atmospheric pressure of refrigeration room reduced, the bypass pipe was indoor with the leading-in refrigeration of external environment's gas to through the setting of bypass pipe, keep the sealed of liquid seal section and bypass pipe department, with the sealed effect of assurance drain pipe.

Description

Refrigerator and drain pipe for refrigerator

Technical Field

The utility model relates to a refrigeration technology field, in particular to refrigerator and drain pipe for refrigerator.

Background

At present, no matter the refrigerator is a direct cooling type or an air cooling type, in the refrigerating process of the refrigerator, wet air in the refrigerator (entering the refrigerator when a door of the refrigerator is opened and closed) is condensed to the low-temperature surface of an evaporator to form frost, the frost on the surface of the evaporator can generate chemical frost water after being removed through a defrosting system or manually, the chemical frost water needs to be discharged in time, otherwise, the chemical frost water can flow to all places of a refrigerating chamber of the refrigerator, bacteria can be easily bred, and stored food is easily rotten and deteriorated.

In order to discharge defrosting water in a refrigerator, at present, a water discharge port is directly arranged at the lowest point of a refrigerating chamber of the refrigerator, one end of the water discharge port is connected with a water discharge port in the refrigerating chamber, and the other end of the water discharge port directly extends out of the refrigerating chamber and is opposite to an evaporation pan or a water receiving pan so as to discharge the defrosting water into the evaporation pan or the water receiving pan.

In the related art, the defrosted water forms a liquid seal structure in the drain pipe to ensure sealing in the refrigerating compartment of the refrigerator. However, when the temperature in the compartment is lowered, and the pressure difference between the inside and the outside of the refrigerator is changed due to the door opening and the door closing of a user, the formed liquid seal is pressed into the compartment by the external atmospheric pressure or the internal air into the evaporating dish, and the sealing effect is lost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a drain pipe for refrigerator to can guarantee to correspond the sealed effect of refrigeration room.

In order to solve the technical problem, the utility model adopts the following technical scheme:

according to one aspect of the utility model, the utility model provides a drain pipe for a refrigerator, which comprises an upper drain section, a liquid seal section, a lower drain section and a bypass pipe; the upper drainage section extends from top to bottom, and the top end of the upper drainage section is communicated with a refrigeration compartment of the refrigerator; the liquid seal section extends from bottom to top; the bottom end of the liquid seal section is communicated with the bottom end of the upper drainage section, and the top end of the liquid seal section is lower than the top end of the upper drainage section; the lower drainage section extends from top to bottom; the top end of the lower drainage section is communicated with the top end of the liquid seal section, and the bottom end of the lower drainage section is communicated with the external environment; a first height position is formed at the bottom end of the inner side of the communication part between the lower drainage section and the liquid seal section; the bypass pipe extends from bottom to top; the bottom end of the bypass pipe is connected to the lower part of the upper drainage section; the upper end of the bypass pipe is higher than the first height position and is communicated with the external environment; a second height position is formed at the top end of the inner side of the communication part between the bypass pipe and the upper drainage section; the second height position is lower than the first height position, so that after the liquid in the refrigeration compartment is discharged into the upper drainage section, liquid seals can be formed among the lower part of the upper drainage section, the lower part of the bypass pipe and the liquid seal section.

In some embodiments of the present application, the communication between the upper drainage segment and the liquid seal segment is in a circular arc transition; and the communication part between the liquid seal section and the lower drainage section is in circular arc transition.

In some embodiments of the application, the bypass pipe is arranged from bottom to top in an inclined manner, and the pipe diameter of the bypass pipe is reduced from bottom to top.

In some embodiments of the present application, a cap is attached to an upper end of the bypass pipe, and the cap is provided with a through air hole.

In some embodiments of the present application, the upper drainage segment is inclined in a straight line in a direction from top to bottom.

In some embodiments of the present application, an angle between the inclined direction of the upper drainage segment and a horizontal plane is greater than or equal to 45 degrees and less than or equal to 75 degrees.

In some embodiments of the present application, the drain pipe is wound with a heating wire around its outer circumference.

In some embodiments of the present application, the upper portion of the lower drainage segment is perforated with an opening spaced from the first elevation.

According to another aspect of the present application, there is provided a refrigerator comprising a refrigerating compartment, and the above-mentioned drain pipe; the drain pipe is arranged outside the refrigerating chamber and communicated with the bottom of the refrigerating chamber.

In some embodiments of the present application, an evaporation pan is disposed below the lower drainage section; the vertical projection of the bottom end of the lower drainage section is positioned in the evaporating dish; and a limiting bulge is arranged in the evaporating dish, extends into the lower drainage section and is spaced from the lower drainage section.

According to the above technical scheme, the utility model discloses following advantage and positive effect have at least:

the utility model discloses in, the indoor liquid of refrigerator refrigeration room gets into back in the drainage segment on the top of going up drainage segment, and liquid flows into the liquid seal section from last drainage segment, and when the height of the liquid in the liquid seal section reached first high position, drainage segment discharge downwards under the unnecessary liquid meeting, and liquid forms the liquid seal between the lower part of last drainage segment, the lower part of bypass pipe and the liquid seal section to sealed drain pipe.

The bypass pipe and the lower drainage section are respectively communicated with the external environment, and the second height position is lower than the first height position, so that the liquid level in the bypass pipe is the same as the liquid level in the liquid seal section. When the air pressure in the refrigerating chamber becomes high, the middle liquid of the upper drainage section enters the lower drainage section from the liquid seal section so as to be discharged. When the air pressure in the refrigerating chamber is too high and the liquid level in the upper drainage section is lower than the second height position, the liquid in the bypass pipe enters the upper drainage section, and the gas in the refrigerating chamber enters the bypass pipe through the upper drainage section and is discharged outwards, so that the air pressure in the refrigerating chamber is reduced, and the liquid in the bypass pipe enters the upper drainage section. And because the bypass pipe and the lower drainage section are respectively communicated with the external environment, the air pressure of the middle upper part of the bypass pipe is communicated with the air pressure of the top end of the liquid seal section, thereby keeping the liquid level height in the bypass pipe the same as the liquid level height in the liquid seal section and keeping the liquid seal at the liquid seal section and the bypass pipe.

When the air pressure in the refrigerating chamber is reduced, under the action of negative pressure, the liquid levels of the liquid in the liquid sealing section and the bypass pipe are reduced, after the liquid level in the bypass pipe is reduced to a second height position, the liquid in the upper drainage section enters the bypass pipe, and the gas in the bypass pipe penetrates through the liquid in the upper drainage section and enters the refrigerating chamber, so that the air pressure in the refrigerating chamber is increased, and the sealing of the liquid at the liquid sealing section and the bypass pipe is kept.

When the air pressure in the refrigerating chamber is overlarge, the bypass pipe releases gas outwards; when the air pressure in the refrigeration chamber is reduced, the bypass pipe leads the gas of the external environment into the refrigeration chamber, and the sealing of the liquid sealing section and the bypass pipe is kept through the arrangement of the bypass pipe, so that the sealing effect of the drain pipe is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the refrigerator of the present invention.

Fig. 2 is a schematic structural view of the embodiment of the water draining pipe of the present invention.

Fig. 3 is a schematic perspective view of the embodiment of the drain pipe of the present invention.

Fig. 4 is a schematic sectional view of the embodiment of the drainage pipe of the present invention.

FIG. 5 is a schematic view of the liquid level in the drain at the same pressure in the refrigerated compartment as the ambient air.

FIG. 6 is a schematic view of the liquid level in the drain tube when the air pressure in the refrigerated compartment is less than the ambient air pressure.

FIG. 7 is a schematic view of the liquid level in the drain at a pressure greater than ambient pressure in the refrigerated compartment.

Fig. 8 is a schematic structural view of another embodiment of the drain pipe of the present invention.

The reference numerals are illustrated below: 100. a box body; 110. a refrigeration compartment; 120. a water collection cavity; 200. a drain pipe; 201. a first elevation position; 202. a second elevation position; 210. an upper drainage section; 220. liquid sealing section; 230. a lower drainage section; 231. opening a hole; 240. a bypass pipe; 250. a tube cover; 251. air holes; 300. an evaporating dish; 310. a limiting bulge; 400. a heating wire.

Detailed Description

Exemplary embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the related art, the defrosted water forms a liquid seal structure in the drain pipe to ensure sealing in the refrigerating compartment of the refrigerator. However, when the temperature in the compartment is reduced, and the pressure difference between the inside and the outside of the refrigerator is changed due to the door opening and the door closing of a user, the formed liquid seal is pressed into the compartment by the external atmospheric pressure or the internal air, and the sealing effect is lost. The embodiment provides a drain pipe for a refrigerator, so as to solve the technical problems.

For convenience of description and understanding, the refrigerator is oriented vertically to the user with reference to a state when the refrigerator is vertically used.

Fig. 1 is a schematic structural diagram of the refrigerator of the present invention. Fig. 2 is a schematic structural view of an embodiment of the drain pipe of the present invention.

Referring to fig. 1 and 2, the present embodiment provides a refrigerator for storing articles at low temperature, which may also be a refrigerated showcase or a refrigerated wine cabinet. The refrigerator includes a cabinet 100, a door rotatably covering the cabinet 100, a refrigerating assembly disposed in the cabinet 100, and a drain pipe 200 disposed in the cabinet 100.

The cabinet 100 is constructed to form a refrigerating compartment 110, and food items are placed in the refrigerating compartment 110 to be stored at a low temperature. The refrigerating compartment 110 includes a refrigerating compartment and a freezing compartment which are spaced apart from each other and have front openings. The refrigerating chamber is used for refrigerating food, and the freezing chamber is used for freezing food. The specific structure of the box 100 refers to the structure of the box in the related art, and is not described herein.

A water collecting cavity 120 is concavely formed at the bottom of the refrigerating compartment 110, and the water collecting cavity 120 is of a conical structure and is used for collecting defrosting water in the refrigerating compartment 110.

The door is rotatably covered on the cabinet 100 to open or close the refrigerating compartment 110 of the cabinet 100, and articles are taken and placed in the refrigerating compartment 110. Exemplary door includes a freezing door for covering the freezing chamber and a refrigerating door for covering the refrigerating chamber. The cold storage door can be opened and closed and covers the front side of the cold storage chamber.

In this embodiment, a hinge is provided between the door and the cabinet 100 to connect the door to the cabinet 100 through the hinge, so that the door can rotate about an axis in a vertical direction. The hinge is arranged on one side of the box door in the left and right directions.

The cooling assembly is used for releasing heat in the refrigerator to the external environment, and is used for providing cooling energy to the cooling compartment 110 so as to maintain a low-temperature environment in the cooling compartment 110. The refrigeration assembly comprises a compressor, a condenser, an evaporator, a capillary tube and the like. The specific structure and connection relationship of the refrigeration assembly refer to the refrigeration assembly in the related art, and are not described herein in detail.

The drain pipe 200 is located outside the refrigerating compartment 110 and below the refrigerating compartment 110. The upper end of the drain pipe 200 is connected to and communicates with the sump 120 for discharging the liquid in the refrigerating compartment 110.

The liquid in the refrigerated compartment 110 is defrosted water or water that is otherwise collected in the refrigerated compartment 110.

In this embodiment, an evaporation pan 300 is disposed below the drain pipe 200, and a projection of an outlet below the drain pipe 200 is located in the evaporation pan 300, so that the liquid in the refrigeration compartment 110 is discharged into the evaporation pan 300 through the drain pipe 200.

A limiting bulge 310 is arranged in the evaporating dish 300, the limiting bulge 310 extends into an outlet at the lower end of the drain pipe 200 and is spaced from the outlet, and the limiting bulge 310 is used for limiting the drain pipe 200 and avoiding the displacement of the drain pipe 200.

The spacing between the limiting protrusion 310 and the outlet at the lower end of the drain pipe 200 is provided to allow the liquid in the drain pipe 200 to flow out to the evaporating dish 300 from the spacing.

In this embodiment, the upper end of the limiting protrusion 310 is a conical structure to conveniently extend into the drain pipe 200.

Referring to fig. 1 and 2, the drain pipe 200 includes an upper drain section 210, a liquid seal section 220, a lower drain section 230, and a bypass pipe 240 communicating with the upper drain section 210. The upper drainage section 210, the liquid seal section 220 and the lower drainage section 230 are sequentially arranged, an inlet of the upper drainage section 210 is connected with the lower end of the refrigeration chamber 110, liquid in the refrigeration chamber 110 sequentially passes through the upper drainage section 210, the liquid seal section 220 and the lower drainage section 230 so as to be discharged from the lower drainage section 230, water columns can be formed in the liquid seal section 220 and the upper drainage section 210, a liquid seal structure is formed, and the liquid seal drainage pipe 200 is used for preventing gas in the external environment from entering the refrigeration chamber 110 from the drainage pipe 200.

Bypass pipe 240 can discharge the gas in cooling compartment 110 from bypass pipe 240 to reduce the gas pressure in cooling compartment 110 when the gas pressure in cooling compartment 110 increases. And can guide the gas in the external environment into the refrigerating compartment 110 to increase the pressure of the gas in the refrigerating compartment 110 when the pressure of the gas in the refrigerating compartment 110 changes. Therefore, the relative balance between the air pressure in the refrigeration compartment 110 and the air pressure in the external environment is effectively maintained through the effect of the bypass pipe 240, so that the liquid-sealed water column always exists in the drain pipe 200, and the sealing of the drain pipe 200 to the refrigeration compartment 110 is maintained.

The upper drainage section 210 extends from top to bottom, and the top end communicates with the refrigeration compartment 110 of the refrigerator for receiving liquid collected in the refrigeration compartment 110. The bottom end of the upper drainage section 210 is communicated with the bottom end of the liquid seal section 220, and the liquid in the upper drainage section 210 is conveyed to the liquid seal section 220.

The top end of the upper drainage segment 210 is connected and communicated with the bottom of the water collecting cavity 120 in the refrigeration compartment 110.

In this embodiment, the upper drainage segment 210 is disposed to be inclined along a straight line in a direction from top to bottom. The liquid in the refrigerating compartment 110 enters the upper drainage section 210 from the refrigerating compartment 110 and then flows along the inner pipe wall of the upper drainage section 210, so that the liquid in the refrigerating compartment 110 is prevented from directly falling onto the pipe wall at the bottom end of the upper drainage section 210, and the water flow sound of the liquid in the upper drainage section 210 is prevented from being too loud.

In this embodiment, an included angle between the inclined direction of the upper drainage segment 210 and the horizontal plane is greater than or equal to 45 degrees and less than or equal to 75 degrees.

It should be noted that in some embodiments, upper drainage section 210 is vertically oriented when it is not desired to control the sound of the water flow.

Referring again to fig. 1 and 2, the liquid seal section 220 extends from bottom to top; the bottom end of the liquid seal section 220 is communicated with the bottom end of the upper drainage section 210, and the top end of the liquid seal section 220 is communicated with the top end of the lower drainage section 230. The bottom end of the liquid seal section 220 is communicated with the bottom end of the upper drainage section 210, and when the liquid in the refrigerating compartment 110 reaches a preset volume, a liquid seal is formed between the upper drainage section 210 and the liquid seal section 220.

When the height of the hydraulic seal water column in the hydraulic seal section 220 reaches the top of the inner side of the hydraulic seal section 220, the excess liquid overflows from the upper end of the hydraulic seal section 220 to the lower drainage section 230.

In this embodiment, the connection between the upper drainage section 210 and the liquid seal section 220 is in arc transition, in some embodiments, the connection between the upper drainage section 210 and the liquid seal section 220 is directly bent and connected, and the connection between the upper drainage section 210 and the liquid seal section 220 is in a V shape.

When the air pressure in the cooling compartment 110 is the same as the air pressure in the external environment, the liquid level in the upper drainage section 210 is the same as the liquid level in the liquid seal section 220. In this embodiment, the top end of the liquid sealing section 220 is lower than the top end of the upper drainage section 210, so that the liquid in the upper drainage section 210 can be effectively prevented from flowing back into the refrigerating compartment 110.

The volume of the upper drainage section 210 is more than twice of the volume of the liquid seal section 220, so that even if all the liquid in the liquid seal section 220 enters the upper drainage section 210, the liquid in the upper drainage section 210 can be prevented from entering the refrigerating compartment 110. Specifically, in the embodiment, the drain pipe 200 is a circular pipe, and the length of the upper drain section 210 is more than twice that of the liquid seal section 220.

Fig. 3 is a schematic perspective view of the embodiment of the drain pipe of the present invention.

Referring to fig. 1 to 3, the lower drainage section 230 extends upward and downward; the top end of the lower drainage section 230 is communicated with the top end of the liquid seal section 220, and the bottom end is communicated with the external environment, so that the liquid overflowing from the liquid seal section 220 can be drained.

In this embodiment, the evaporation pan 300 is disposed below the lower drainage section 230, and the vertical projection of the bottom end of the lower drainage section 230 is located in the evaporation pan 300, so that the liquid overflowing from the liquid sealing section 220 is guided into the evaporation pan 300 along the lower drainage section 230.

The limiting protrusion 310 in the evaporating dish 300 extends into the bottom end of the lower drainage section 230 to prevent the lower drainage section 230 from being displaced. The stopper projection 310 is spaced apart from the lower drainage section 230 so as not to interfere with the discharge of the liquid in the lower drainage section 230.

The top end of the lower drainage section 230 is communicated with the top end of the liquid seal section 220, and the bottom end of the inner side of the communication part between the lower drainage section 230 and the liquid seal section 220 is formed with a first height position 201. After the water level in the hydraulic seal section 220 reaches the first height position 201, the liquid exceeding the first height position 201 overflows from the hydraulic seal section 220 and is discharged through the lower drainage section 230.

In this embodiment, the connection between the liquid seal section 220 and the lower drainage section 230 is in arc transition, and the extension directions of the upper drainage section 210, the liquid seal section 220 and the lower drainage section 230 are in an S-like shape. In some embodiments, the connection between the lower drainage section 230 and the liquid seal section 220 is directly bent, and the connection between the lower drainage section 230 and the liquid seal section 220 is in a "V" shape.

The upper portion of the lower drainage section 230 is formed with an opening 231, and the opening 231 is spaced apart from the first height position 201. When the liquid level in the evaporation pan 300 exceeds the bottom end of the lower drainage section 230 to submerge the bottom end of the lower drainage section 230, and the air pressure in the refrigeration compartment 110 suddenly rises (the door is rapidly closed), the gas in the lower drainage section 230 can be discharged from the opening 231, so that the gas in the lower drainage section 230 is prevented from entering the liquid in the middle of the evaporation pan 300, the gas in the lower drainage section 230 is effectively prevented from generating bubble sound in the liquid in the evaporation pan 300, and the noise is reduced.

It should be noted that in some embodiments, the drain pipe 200 does not include the lower drain section 230, and liquid overflowing in the drain pipe 200 is drained from the bottom inside the top end of the wet seal section 220.

Fig. 4 is a schematic sectional view of the embodiment of the drainage pipe of the present invention.

Referring to fig. 1 to 4, the bypass pipe 240 communicates with the upper drain section 210 so that the liquid in the upper drain section 210 can enter the bypass pipe 240. The bypass pipe 240 extends from bottom to top; the bottom end of the bypass pipe 240 is connected to the lower part of the upper drainage section 210; the upper end of the bypass pipe 240 is above the first elevation 201 and is open to the environment. The bypass pipe 240 is connected to the outside environment and the lower drainage section 230 is connected to the outside environment, so that the air pressure in the bypass pipe 240 is the same as the air pressure in the lower drainage section 230, and after the liquid enters the bypass pipe 240 from the upper drainage section 210, the liquid in the bypass pipe 240 and the liquid in the liquid sealing section 220 have the same liquid level. The upper end of the bypass pipe 240 is higher than the first elevation 201, so that it can be ensured that the liquid in the drain pipe 200 overflows from the wet seal section 220 into the lower drain section 230 without overflowing from the bypass pipe 240.

In this embodiment, the upper end of the bypass pipe 240 is higher than the upper end of the wet seal section 220, so as to further ensure that the liquid does not overflow from the upper end of the bypass pipe 240.

A second height position 202 is formed at the top end of the inner side of the communication part between the bypass pipe 240 and the upper drainage section 210; the second elevation position 202 is lower than the first elevation position 201, and when the liquid level in the hydraulic seal section 220 reaches the first elevation position 201, the liquid in the upper drainage section 210 can enter the bypass pipe 240 and submerge the second elevation position 202, so that the liquid forms a hydraulic seal between the upper drainage section 210 and the bypass pipe 240. Accordingly, after the liquid in the cooling compartment 110 is discharged into the upper drain section 210, a liquid seal can be formed between the lower portion of the upper drain section 210, the lower portion of the bypass pipe 240, and the liquid seal section 220.

Fig. 5 is a schematic view of the liquid level in the drain at the same pressure in the refrigerated compartment as the ambient air.

Referring to fig. 1 to 5, for example, when the cooling compartment 110 is defrosted, the cooling compartment 110 is opened for a long time, or the cooling compartment 110 is closed for a long time, when the air pressure in the cooling compartment is the same as the external air pressure, after the liquid in the cooling compartment 110 enters the upper drainage section 210 from the top end of the upper drainage section 210, the liquid flows into the liquid seal section 220 from the upper drainage section 210, when the height of the liquid in the liquid seal section 220 reaches the first height position 201, the excess liquid is discharged downward from the lower drainage section 230, and the liquid forms a liquid seal between the lower part of the upper drainage section 210, the lower part of the bypass pipe 240, and the liquid seal section 220, so as to seal the drainage pipe 200. When the refrigerator is defrosted, the external air can be prevented from entering the refrigerating compartment 110 through the drain pipe 200,

FIG. 6 is a schematic view of the liquid level in the drain tube when the air pressure in the refrigerated compartment is less than the ambient air pressure.

Referring to fig. 1 to 6, when the normal cooling is resumed after defrosting is completed, the air pressure in the cooling compartment 110 is decreased as the temperature in the cooling compartment 110 is gradually decreased. When the air pressure in the refrigeration compartment 110 is reduced, under the action of negative pressure, the liquid level in the liquid seal section 220 and the liquid level in the bypass pipe 240 are reduced, after the liquid level in the bypass pipe 240 is reduced to the second height position 202, the liquid in the upper drainage section 210 enters the bypass pipe 240, and the gas in the bypass pipe 240 passes through the liquid in the upper drainage section 210 and enters the refrigeration compartment 110, so that the air pressure in the refrigeration compartment 110 is increased, and the sealing of the liquid at the liquid seal section 220 and the bypass pipe 240 is maintained. Meanwhile, the liquid seal section 220 and the bypass pipe 240 are both communicated with the outside, so that the liquid level heights of the liquid seal section 220 and the bypass pipe 240 are always kept consistent.

When the door is suddenly opened, the gas in the refrigeration compartment 110 expands, and the air pressure in the refrigeration compartment 110 decreases. When the air pressure in the refrigeration compartment 110 is reduced, under the action of negative pressure, the liquid level in the liquid seal section 220 and the liquid level in the bypass pipe 240 are reduced, after the liquid level in the bypass pipe 240 is reduced to the second height position 202, the liquid in the upper drainage section 210 enters the bypass pipe 240, and the gas in the bypass pipe 240 passes through the liquid in the upper drainage section 210 and enters the refrigeration compartment 110, so that the air pressure in the refrigeration compartment 110 is increased, and the sealing of the liquid at the liquid seal section 220 and the bypass pipe 240 is maintained. Meanwhile, the liquid level of the liquid seal section 220 and the liquid level of the bypass pipe 240 are always consistent as the liquid seal section 220 and the bypass pipe 240 are both communicated with the outside.

When the door is separated from the cabinet 100, air in the external environment is communicated with air in the refrigerating compartment 110, the air pressure in the refrigerating compartment 110 is the same as the air pressure in the external environment, the liquid level in the upper drainage section 210 is lowered, and the liquid level in the bypass pipe 240 and the liquid seal section 220 is raised. Since the air pressure is the same in all places, the liquid level in the upper drain section 210, the liquid level in the bypass pipe 240 and the liquid level in the liquid seal section 220 are kept consistent in height and sealed against the drain pipe 200.

Fig. 7 is a schematic view of the liquid level in the drain at a pressure greater than ambient pressure in the refrigerated compartment.

Referring to fig. 1 to 7, the bypass pipe 240 and the lower drainage section 230 are respectively communicated with the external environment, and the second height position 202 is lower than the first height position 201, so that the liquid level in the bypass pipe 240 is the same as the liquid level in the liquid seal section 220. When the air pressure in the refrigerating compartment 110 becomes high (e.g., when the door is suddenly closed), the middle liquid in the upper drainage section 210 enters the lower drainage section 230 from the liquid seal section 220 and is discharged. And when the air pressure in the refrigeration compartment 110 is too high, when the liquid level in the upper drainage section 210 is lower than the second height position 202, the liquid in the bypass pipe 240 enters the upper drainage section 210, and the gas in the refrigeration compartment 110 enters the bypass pipe 240 through the upper drainage section 210 and is discharged outwards, so that the air pressure in the refrigeration compartment 110 is reduced, and the liquid in the bypass pipe 240 enters the upper drainage section 210. And because the bypass pipe 240 and the lower drainage section 230 are respectively communicated with the external environment, the air pressure at the upper part in the bypass pipe 240 is communicated with the air pressure at the top end of the liquid seal section 220, so that the liquid level in the bypass pipe 240 is kept to be the same as the liquid level in the liquid seal section 220, and the liquid is kept to be sealed at the liquid seal section 220 and the bypass pipe 240. The liquid seal section 220 and the bypass pipe 240 are caused by the atmospheric pressure of the external environment after the atmospheric pressure in the refrigerating compartment 110 becomes small.

After the door is closed, the cooling compartment 110 continues to cool, the pressure in the cooling compartment 110 decreases with a decrease in temperature, the liquid level in the upper drainage section 210 rises, and the liquid levels in the bypass pipe 240 and the liquid seal section 220 fall in synchronization with each other.

Based on this, when the air pressure in the refrigerating compartment 110 is too large, the bypass pipe 240 releases the gas to the outside; when the air pressure in the refrigeration compartment 110 is reduced, the bypass pipe 240 guides the gas of the external environment into the refrigeration compartment 110, so that the sealing at the liquid sealing section 220 and the bypass pipe 240 is maintained through the arrangement of the bypass pipe 240 to ensure the sealing effect of the drain pipe 200.

The bypass pipe 240 is obliquely arranged from bottom to top, and the pipe diameter of the bypass pipe 240 is gradually reduced in the direction from bottom to top.

In this embodiment, the upper end of the bypass pipe 240 is covered with the pipe cover 250, the pipe cover 250 is provided with the through air hole 251, and by the arrangement of the pipe cover 250 and the air hole 251, under the condition that the gas communication between the bypass pipe 240 and the external environment is ensured, other objects in the external environment are effectively prevented from entering the bypass pipe 240 and causing interference to the bypass pipe 240.

Fig. 8 is a schematic structural view of another embodiment of the drain pipe of the present invention.

Referring to fig. 8, in the present embodiment, a heating wire 400 is wound around the outer circumference of the drain pipe 200. The heating wire 400 is an insulated electric heating wire. The drain pipe 200 is heated before the compressor is started for the first time after defrosting is finished every time, so that the bacterial and algae breeding phenomenon in the drain pipe 200 can be prevented, and the gas in the refrigerating chamber 110 is prevented from being polluted.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terms used are words of description and illustration, rather than words of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. A drain pipe for a refrigerator, comprising:

the upper drainage section extends from top to bottom, and the top end of the upper drainage section is communicated with a refrigeration chamber of the refrigerator;

the liquid seal section extends from bottom to top; the bottom end of the liquid seal section is communicated with the bottom end of the upper drainage section, and the top end of the liquid seal section is lower than the top end of the upper drainage section;

a lower drainage section extending from top to bottom; the top end of the lower drainage section is communicated with the top end of the liquid seal section, and the bottom end of the lower drainage section is communicated with the external environment; a first height position is formed at the bottom end of the inner side of the communication part between the lower drainage section and the liquid seal section;

a bypass pipe extending from bottom to top; the bottom end of the bypass pipe is connected to the lower part of the upper drainage section; the upper end of the bypass pipe is higher than the first height position and is communicated with the external environment; a second height position is formed at the top end of the inner side of the communication part between the bypass pipe and the upper drainage section; the second height position is lower than the first height position, so that after the liquid in the refrigeration compartment is discharged into the upper drainage section, liquid seal can be formed among the lower part of the upper drainage section, the lower part of the bypass pipe and the liquid seal section.

2. The drain pipe of claim 1 wherein the communication between the upper drain section and the hydraulic seal section is radiused; and the communication part between the liquid seal section and the lower drainage section is in circular arc transition.

3. The drain pipe of claim 1 wherein the bypass pipe is angled from bottom to top and the bypass pipe tapers in diameter in the direction from bottom to top.

4. The drain pipe according to claim 1, wherein a cap is fitted to an upper end of the bypass pipe, and the cap is provided with a through air hole.

5. The drain pipe of claim 1 wherein the upper drainage section is linearly inclined in a direction from top to bottom.

6. The drain pipe of claim 5 wherein the angle between the inclined direction of the upper drainage segment and the horizontal plane is greater than or equal to 45 degrees and less than or equal to 75 degrees.

7. The drain of claim 1 wherein the drain has a heating wire wrapped around its periphery.

8. The drain of claim 1 wherein the upper section of the lower drainage section defines an opening spaced from the first elevation.

9. A refrigerator, characterized by comprising a refrigerating compartment and a drain according to any one of claims 1-8; the drain pipe is arranged outside the refrigerating chamber and communicated with the bottom of the refrigerating chamber.

10. The refrigerator as claimed in claim 9, wherein an evaporating dish is provided under the lower drain section; the vertical projection of the bottom end of the lower drainage section is positioned in the evaporating dish; and a limiting bulge is arranged in the evaporating dish, extends into the lower drainage section and is spaced from the lower drainage section.

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