WO2009132940A2

WO2009132940A2 - Refrigerator

Info

Publication number: WO2009132940A2
Application number: PCT/EP2009/054229
Authority: WO
Inventors: Yufa Bai; Alexander Rupp; Feng Tao
Original assignee: BSH Bosch und Siemens Hausgeräte GmbH
Priority date: 2008-04-29
Filing date: 2009-04-08
Publication date: 2009-11-05
Also published as: RU2010145775A; CN201206924Y; WO2009132940A3; EP2283288A2

Abstract

The invention relates to a refrigerator which comprises a body (1) having an interior storage space and a movable door (2) that is mounted on the body for opening and closing the interior storage space. An outlet conduit (30) for disposing of the water generated inside the interior storage space during the defrost cycle and for guiding it towards the exterior of the body being mounted inside the body. A pressure compensation device (3) for compensating the air pressure inside and outside the body is mounted on the outlet conduit, said pressure compensation device comprising an outlet device mounted at the end of the outlet conduit and an air inlet device (35) in the vicinity of the end of the outlet conduit. Said outlet device does not store the water generated during the defrost cycle and at the same time prevents air from the exterior from entering the outlet conduit.

Description

description

fridge

[Technological area]

This utility model relates to an electrical household appliance, in particular to an electric household refrigerator.

[Technological background]

The shortcoming of traditional refrigerators is as follows: Since there is a pressure difference between the air of the internal storage space of the refrigerator and the outside ambient air, the result is that the door of the refrigerator can be opened only with great effort. US Pat. Nos. 5,499,514 and 5,557,942 disclose a method of solving this deficiency: A bypass line is mounted on the drainage water drainage pipe of the storage room which has a function of unidirectional air inlet. In addition, at the end of the drain pipe, a U-shaped water storage kink piece is attached. When the user opens the door, the outside air penetrates through the bypass line into the inner storage space, whereby the pressure difference between inside and outside balanced and the opening of the door is facilitated. Furthermore, the construction of the U-shaped water storage Kiegestücks seals the end of the drain pipe, which means that in the closed state of the door, the warm outside air can not get through the end of this drain pipe into the inner storage room. The deficiency of this improved design consists in the following: Since water is always stored in the U-shaped water storage kink, during the opening of the door by the user, the suction force resulting from the pressure difference between inside and outside can cause an upward movement of the defrost water from the U -keeping water accumulation kink in the drain pipe cause. The upwardly moving water returns to the U-shaped water storage kink after opening the door. The rising water and the returning water can cause rippling noise during the movement. This lack of noise is not desired by the designers of the refrigerator. The aim of this utility model is to provide a refrigerator which can equalize both the pressure differential inside and outside the storage room as well as eliminate the noises of the defrosting water.

For realizing the above-mentioned object of the utility model, a refrigerator of one embodiment of this utility model comprises a cabinet body with an internal storage space and a movable door mounted on the cabinet body for opening and closing this inner storage space, in which cabinet body a drain pipe for draining the defrost water generated in this inner storage room is mounted to the outside of the cabinet body, on this drain pipe, a pressure compensation device for balancing the air pressure inside and outside the cabinet body is mounted, this pressure compensation device has a attached at the end of the drain pipe drainage and an attached near the end of the drain pipe air inlet device, this drain device the defrost water does not store and at the same time prevents external air from entering the drain pipeline.

A further improvement of this utility model is that the described drain pipe comprises a drain check valve mounted at the end of the drain pipe; that the drain check valve described comprises a connected to the end of the drain pipe connecting part and a protruding from the connecting part sealing part; the described sealing part comprises a soft pressed-material part with a sealing opening, which sealing opening can open under the force of gravity of the defrosting water.

A further improvement of this utility model is that the described air inlet device comprises a bypass line connected to the drain line and an air inlet check valve mounted at the end of the bypass line; the described air inlet check valve comprises a valve seat fixed to the end of the bypass line and a valve seat mounted in the valve seat; in that the described valve insert comprises a V-shaped leaf spring which bears against the inner wall of the air inlet channel of the valve seat, this leaf spring bending and deforming under the effect of the pressure difference inside and outside the cabinet body.

The efficiency of this utility model is as follows: By attaching the air inlet device on the drain pipe, it is possible when opening the door Introduce fresh air into the storage room and equalize the pressure difference between inside and outside. The construction of the drainage device on the drainage pipe allows the end of the drainage pipe, on the one hand, to store no defrost water and, on the other hand, to prevent the ingress of outside air into the drainage pipe.

[Brief Description of the Figures]

Figure 1 shows a three-dimensional schematic representation of a refrigerator of this utility model.

Figure 2 shows a schematic representation of a drain pipe with air inlet device and drain device of an embodiment of this utility model.

Figure 3 shows the sectional view of the drainage pipe from Figure 2.

[Specific Embodiment]

As shown in Figure 1, a refrigerator of one embodiment of this utility model comprises a cabinet body 1, the cabinet body 1 having inside it a storage room divided into the freezer room and the cold store room. This storage room can be closed by the door 2. In the lower rear part of the cabinet body 1, the pressure compensation device 3 is attached. In this embodiment, the pressure compensating device 3 is used to equalize the pressure inside and outside the freezing space of the storage space of the cabinet body.

As shown in FIGS. 2 and 3, the pressure compensating device 3 includes the defrosting water drainage pipe 30, the downcomer attached to the end of the downcomer pipe, and the air inlet device mounted near the end of the downcomer pipe. In this embodiment, the upper end of the drain pipe 30 passes through the heat insulating foam layer 10 of the cabinet body and extends into the interior of the freezer compartment. Inside the freezer compartment there is an opening to collect the defrost water. The lower end of the drain pipe 30 extends to the water receiving cup fifth The drain device comprises a drain check valve 31 connected to the lower end of the drain pipe 30. In this embodiment, the drain check valve 31 comprises a connection part 32 connected to the end of the drain pipe and a seal part 33 projecting downwardly from the connection part. The seal part 33 is made of soft pressed material. At the end of which creates by mutual contraction and close pressing a seal opening. When defrost water does not flow therethrough, this seal opening seals the drain check valve 31 and prevents the outside air from passing through the lower end of the drain pipe 30 into the freezer room. When defrost water flows to this seal opening, this seal opening can open under the gravity of the defrost water. The advantage of this construction is the following: As long as defrost water flows to this seal opening, the defrost water can be discharged into the water intake tray 5 at any time, so that no defrost water is stored in the seal member 33.

The air inlet device includes a bypass line 34 connected to the downcomer 30 and an air inlet check valve 35 mounted at the end of the bypass line 34. In this embodiment, the air inlet check valve 35 includes a valve seat 36 secured to the end of the bypass line and a valve seat 37 mounted in the valve seat 36, the valve insert 37 a V-shaped leaf spring 38 which bears against the inner wall of the air inlet channel of the valve seat 35. When the door 2 is closed and the pressure inside and outside the freezer compartment of the cabinet body 1 is balanced, this leaf spring 38 seals this bypass duct 34 and prevents outside air from entering the freezer compartment via the discharge duct 30. In the process of opening the door 2, this leaf spring 38 bends down under the action of the pressure difference inside and outside the cabinet body 1 and deforms. As a result, the bypass channel 34 is opened, the outside air is passed via the drainage channel 30 into the freezer compartment and equalizes the air pressure inside and outside the freezer compartment.

Claims

claims

A refrigerator including a cabinet body having an inner storage room and a movable door mounted on the cabinet body for opening and closing this inner storage room, in which cabinet body a drain pipe for discharging the defrost water generated in the inner storage room is mounted outside the cabinet body Drainpipe a pressure equalization device is mounted to compensate for the air pressure inside and outside the cabinet body and this pressure compensation device comprises a mounted at the end of the drain pipe drainage device and an attached near the end of the drain pipe air inlet device, characterized in that this drain device does not store the defrost water and prevents that external air enters the drain pipeline.

2. Refrigerator according to claim 1, characterized in that the drain device described comprises a mounted at the end of the drain pipe drain check valve.

3. Refrigerator according to claim 2, characterized in that the drain check valve described comprises a connected to the end of the drain pipe connection part and a protruding from the connecting part sealing part.

4. Refrigerator according to claim 3, characterized in that the sealing part described comprises a soft pressed material part with a sealing opening, said sealing opening can open under the force of gravity of the defrost water.

Refrigerator according to any one of the preceding claims, characterized in that the described air inlet device comprises a bypass line connected to the drain pipeline and an air inlet check valve mounted at the end of the bypass line.

6. Refrigerator according to claim 5, characterized in that the described air inlet check valve comprises a valve seat fixed at the end of the bypass line and a valve seat mounted in the valve seat.

7. Refrigerator according to claim 6, characterized in that the valve insert described comprises a V-shaped leaf spring, which on the inner wall of the inlet channel of the Valve seat abuts, and this leaf spring bends under the action of the pressure difference between inside and outside of the cabinet body and deformed.