EP1926947A2

EP1926947A2 - No-frost refrigeration device

Info

Publication number: EP1926947A2
Application number: EP06793293A
Authority: EP
Inventors: Michaela Malisi
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2005-09-12
Filing date: 2006-09-07
Publication date: 2008-06-04
Also published as: RU2405118C2; RU2008111570A; WO2007031457A3; WO2007031457A2; DE202005014370U1; CN101263351A

Abstract

The invention relates to an evaporator unit for a no-frost refrigeration device which comprises an evaporator, a support (7) which surrounds the evaporator, wherein a passage (10) which leads to an air channel (14) is formed in a wall (16) of the support (7), and a ventilator (11) which is mounted on the passage (10) such that vibrations are dampened and is supported by a wall element (15) of the air channel (14) which is opposite the passage (10). The wall element (15) is secured to the support (7) by means of vibration-dampening elements (20, 21).

Description

No-frost refrigerating appliance

The present invention relates to a no-frost refrigerator with an evaporator assembly. Such an assembly conventionally comprises an evaporator, a box-like support delimiting an evaporator chamber in the body of the refrigeration device, in which an air inlet and an air outlet passage to the evaporator chamber are formed and in which the evaporator is housed, and a fan which is located at the air outlet passage of Carrier is attached to push air from the carrier in an air duct over which it reaches a cold room of the refrigerator. In a known evaporator assembly, the fan is mounted directly on a portion of a support wall in which the air outlet opening is formed and which is connected to the rest of the wall by a circumferential flexible rubber lip and thus damped vibrated. A rear wall of an adjoining the air outlet opening air channel is locked in slots of the rubber lip.

The attachment of the fan to the oscillatable portion of the support wall causes the motor of the fan covers a part of the cross section of the air outlet opening. In order nevertheless to obtain a sufficient free flow cross-section, the diameter of the air outlet opening must be made large. In addition, the weight of the fan exerts a torque on the oscillatory portion, which acts on an inclination of the oscillatory portion and biases the rubber lip. The flexibly flexible rubber lip under pressure makes it difficult to lock the air duct rear wall.

Object of the present invention is to provide an easy to install evaporator assembly, which allows a compact design.

The object is achieved by an evaporator assembly comprising an evaporator, a housing surrounding the evaporator, wherein in a wall of the housing, a passage to an air duct is formed, and a vibration-mounted on the passage mounted fan, wherein the fan of a passage opposite wall element of the air duct is worn and the wall element is fixed to the housing via vibration damping elements. This type of attachment of the fan allows the motor to be spaced from the air passage opening so that it does not restrict it and the entire cross-sectional area of the passage is usable. The dimensions of the passage can therefore be kept small.

The vibration damping elements are preferably buffers of an elastically deformable material.

Such a buffer may have a circumferential groove, in each of which engages a selected under wall element and carrier part. The other part can then form a plug-in connection of pin and socket together with the buffer.

In order to form an air channel of substantially closed cross-section, preferably form a first web, which is integrally formed on an outer side of the carrier projecting, and a part of the wall element forming the second web a labyrinth seal.

In order to prevent an undamped transmission of vibration from the fan-carrying wall element to the support of the evaporator, the two webs are preferably arranged without contact surrounding each other.

The vibration damping elements are preferably plug-connected to the wall element and / or to the carrier. At least a first of the vibration damping elements in the plug-connected state should form a pivot point for a pivoting movement - preferably two of the vibration damping elements form an axis - and in the course of pivoting defined by the pivot point or the axis at least one further vibration damping element is plugged.

This further vibration-damping element is preferably locked in the plug-connected state.

When the plug-in directions of the first vibration damping element and the further vibration damping element span a substantially right angle, prevents the further vibration damping element in Plug-connected state that dissolves the first vibration damping element. A backup of the first vibration damping element by locking is therefore not required.

Further features and advantages of the invention will become apparent from the following description of embodiments with reference to the accompanying figures. Show it:

1 shows a schematic section through the upper region of a no-frost

Refrigeration device, which is equipped with an evaporator assembly according to the invention;

Fig. 2 is a perspective view of the carrier of the evaporator assembly and a fan-carrying wall element;

3 shows the housing and the wall element in the interconnected state.

4 is a front view of the wall element according to a first embodiment;

Fig. 5 is a perspective view of a rubber buffer;

6 shows a detail of a wall element according to a second embodiment; and

Fig. 7 is a view of the wall element without fan, seen from the rear side.

Fig. 1 shows a schematic section through the upper portion of a refrigerator according to the invention. The refrigerator has a body 1 and a door 2, which are each realized in a conventional manner as filled with a heat-insulating foam layer 3 hollow body. The interior of the body 1 is divided by a likewise heat-insulating partition wall 4 into an evaporator chamber 5 and a cooling compartment 6. The partition 4 is formed by the bottom of a housing-like support 7 for an evaporator assembly on which a conventional finned evaporator 8 is mounted. The carrier 7 is mounted at a distance from the ceiling of the body 1 and is adjacent - A -

together with the side walls of the body, the evaporator chamber 5 from. The carrier 7 further has an air inlet passage 9 on its side facing the door 2 and an air outlet passage 10 on its side facing the rear wall of the body 1. In a rear region of the evaporator chamber 5, behind the air outlet passage 10 of the carrier 7, a fan 1 1 with paddle wheel 12 and motor 13 is housed, the air from the evaporator chamber 5 subtracts and presses into an air channel 14.

In the exemplary section of FIG. 1, the air duct 14 extends only through the partition wall 4 and opens into the immediately below the cooling compartment 6. The air duct 14 could alternatively be guided within the rear wall of the body 1 and with a plurality of through holes to the cooling compartment Be provided 6, over which the cold air flowing in the air duct over the height of the cooling compartment 6 evenly distributed. Furthermore, a valve could be provided in the air duct 14, which selectively feeds the cold air flow via various branches of the air duct to one of a plurality of compartments of the refrigeration appliance, for example the refrigerated compartment 6 and a freezer compartment, not shown.

FIG. 2 shows a perspective view of the substantially plastic injection-molded carrier 7 and a bowl-shaped wall element 15 to be mounted on it. The circular air outlet passage 10 is located in a substantially flat rear wall 16 of the carrier 7. Concentrically with the passage 10, there is a circular arc curved web 17 from the rear wall 16 from. The wall element 15 has a flat, in the Fig. As well as in the assembled state vertically oriented bottom 18 and a right angle projecting from the bottom 18, extending in a circular arc web 19, in the assembled state shown in Fig. 3 of the carrier 7 and of the wall element 15 engages around the web 17 of the carrier 7 with little play. Even in the assembled state, neither the front edge of the web 19 touch the rear wall 16 nor the rear edge of the web 17 the bottom 18. A connection between the carrier 7 and the wall member 15 thus consists in the assembled state exclusively on upper and lower rubber buffers 20 and 21, so that a direct, undamped transmission of vibrations of the attached to the wall member 15 motor 13 is excluded on the carrier 7. The rubber bumpers 20, 21 have the same shape shown in FIG. 5 in a perspective view. They each have a substantially cylindrical body with an axially continuous bore 22 and, adjacent to an end face of the cylinder, a circumferential outer groove 23 and a subsequent to the groove 23 support flange 24th

The upper two rubber buffers 20 are respectively inserted into holes of the rear wall 16, so that the rear wall 16 engages in the circumferential groove 23 of the rubber buffer 20. The bore 22 of the buffer 20 is oriented horizontally. The lower buffers 21 are mounted with vertically oriented bore on two wings 25 with L-shaped cross section, which protrude laterally from the web 19 of the wall member 15 adjacent to its lower edge. Below the wings 25 extends a horizontal ledge 26 of the carrier 7, on which two upright pins 27 are formed. One of the pins 27 is covered in Fig. 2 by the wall element 15. The assembly of the wall element 15 on the carrier 7 takes place by first the lower rubber buffers 21 of the somewhat obliquely held wall element 15 are attached from above onto the pins 27. Due to a play between the pins 27 and the receiving holes 22 and / or the flexibility of the rubber buffer 21, the wall element 15 is pivotable about a horizontal axis passing through the two pins 27 and is pivoted about this axis in a vertical orientation, in which two Sleeves 28 which are formed on projecting in the upper region of the wall member 15 arms 29 are placed over the attached to the rear wall 16 rubber buffer 20. In this state, shown in FIG. 3, the support flanges 24 of the rubber bumpers 20 hold the sleeves 28 spaced from the rear wall 16.

Due to the engagement of the upper rubber buffers 20 in the sleeves 28, the lower rubber buffers 21 can no longer detach from the pins 27, even without being latched to them. To secure the sleeves 28 to the rubber buffers 20, the

Diameter of the sleeves 28 and the buffer 20 are adapted to each other so that the

Pockets 28 frictionally stuck on the buffers 20. It is also conceivable to provide the sleeves 28 on their inner surfaces with ribs (not shown in the figures) extending in the axial direction, which engage in the material of the buffer when inserted

Press 20, or provide barbs on the inner surfaces of the sleeves 28. FIG. 4 shows a perspective view of the side of the wall element 15 facing the carrier 7, which shows the paddle wheel 12. The impeller 12 has a bottom plate 18 of the wall member 15 adjacent circular base plate 30, from which a plurality of spiral blades 31 projects. By the rotation of the impeller 12, air drawn in through the air outlet passage 10 in the direction of the axis thereof is accelerated radially outwardly and flows out through the open bottom of the wall member.

Fig. 6 is a perspective view of a fragment of the wall member 15 according to a second embodiment of the invention. Instead of the sleeve 28, the arm 29 is here provided with a pin 32 which is aligned to engage in the holes 22 of the upper rubber buffer 20 when the wall element 15 is pivoted about the axis defined by the lower rubber buffers 21 against the rear wall 16 to enforce them and to hook with a thickened free end on the inside of the rubber buffer 20, inside the carrier 7. The pin 32 may, as shown in the figure, be slotted in order to pass through the bore 22 easier, but this is not absolutely necessary due to the flexibility of the rubber buffers 20.

Fig. 7 is a perspective view of the wall member 15, seen from the rear, without mounted fan 1 1. From the outside of the bottom 18 is a U-shaped bracket 33 from which is stiffened by protruding in a horizontal plane ribs 34 , An upwardly open notch 35 in the bracket 33 carries a bearing 36 which serves to suspend the shaft of the motor 13. In the bottom 18 of the wall member 15, a wedge-shaped, narrowing towards the center of the bottom 18 toward slot 37 is formed. At the lower end of the slot 37, at the center of the bottom 18, there is a second bearing 38 for the motor 13. When assembling the evaporator assembly, the two bearings 36, 38 are first connected to the shaft of the motor 13 and then the front portion of the Shaft with the bearing 38 in the upper portion of the slot 37 introduced. By now motor 13 is displaced downwards together with the bearings 36, 38, the bearings 36, 38 reach their positions shown in Fig. 7, and the motor 13 is held between them. Subsequently, the paddle wheel 12 is attached to the projecting beyond the inside of the bottom 18 portion of the shaft.

Claims

claims

1. No-frost refrigerating appliance with an evaporator (8) which is supported on a evaporator space partitioning a cold room carrier (7) with a wall, wherein in the wall (16) of the support (7) has a passage (10) is formed to an air duct (14), and to the passage (10) vibration dampened mounted fan (1 1), characterized in that the fan (11) of a passage (10) opposite the wall element (15) of the air duct (14 ) and the wall element (15) is fixed to the support (7) via vibration damping elements (20, 21).

2. No-frost refrigerating appliance according to claim 1, characterized in that the vibration-damping elements (20, 21) are buffers of an elastically deformable material.

3. no-frost refrigerator according to claim 2, characterized in that at least one of the buffer (20, 21) has a circumferential groove (23) into which one of the wall element (15) or carrier (7) engages, and that each other of wall element (15) or support (7) on the one hand and the buffer (20, 21) on the other hand each form a socket (28) or a pin engaging in the socket (27).

4. no-frost refrigerator according to one of the preceding claims, characterized in that a first web (17) which is integrally formed on an outer side of the carrier (7) projecting, and a part of the wall element (15) forming the second web (17 19) form a labyrinth seal of the air duct (14).

5. no-frost refrigerator according to claim 4, characterized in that one of the two webs (17, 19) surrounds the other contactless.

6. No-frost refrigerating appliance according to one of the preceding claims, characterized in that the vibration-damping elements (20, 219 with the

Wall element (15) and / or with the carrier (7) are plug-connected.

7. no-frost refrigerating appliance according to claim 6, characterized in that at least a first of the vibration-damping elements (21) in the plug-connected state forms a pivot point for a pivoting movement, in the course of which at least a second vibration damping element (20) is plug-in connection.

8. no-frost refrigerator according to claim 7, characterized in that the second vibration-damping element (20) is locked in the plug-connected state.

9. no-frost refrigerating appliance according to claim 7 or 8, characterized in that the plug-in directions of the first and second vibration damping elements (20, 21) span a substantially right angle.