RU2402724C2 - Refrigerating device without frost buildup - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: refrigerating device without frost buildup comprises evaporation chamber, inner reservoir and cover, which in inner reservoir separates freezer room from air channel, which is connected to evaporation chamber. Cover is retained in cut, which is arranged integrally on inner reservoir by method of deep drawing of inner reservoir.

EFFECT: using this group of inventions makes it possible to save on refrigerating device production by means of its design simplification.

15 cl, 5 dwg

Description

Technical field

The present invention relates to a refrigeration apparatus without freezing frost containing an evaporation chamber, an inner tank and a lid that separates the food storage chamber from the air passage associated with the vaporization chamber in the inner reservoir.

State of the art

Such a refrigeration apparatus without freezing frost may have one storage chamber or multiple storage chambers. In the first case, the cover serves to evenly distribute cold air from the air channel in the storage chamber through a plurality of openings located therein. In a refrigerator with several storage chambers, the lid may not have openings so that cold air can be introduced into the second storage chamber through the air channel along the first storage chamber.

A known solution is to fasten the lid in the inner tank using parts such as, for example, bolts, clamps or the like, which are mounted on the inner tank and hold the edges of the lid pressed against the inner tank. Due to the limited permissible mechanical load of the inner tank and the need to avoid leaks on the inner tank, through which insulating material can penetrate into the storage chamber, these parts in a large number of cases must be designed specifically for use in the inner tank and mounted with great care.

Disclosure of invention

The objective of the invention is to simplify the design of such an apparatus and, thereby, to save individual parts and manufacturing costs.

According to the invention, the problem is solved due to the fact that in the refrigerator of the type indicated above, the lid is held in a cut made entirely on the internal tank. Such an undercut can be made in a simple manner when forming the inner tank using the well-known method of deep drawing from a plastic plate. Although, due to the large number of moving parts, a molding tool designed for deep drawing of such an internal tank will be more expensive and more expensive than a molding tool for an internal tank without undercut, this over-expenditure will still pay off due to the fact that application is not required independent fasteners and the tools necessary for their manufacture, and also does not require labor costs associated with the installation of these fasteners.

If ribbed portions are made on the side walls of the inner tank containing at least one rib to support the shelf for refrigerated products, the undercut can be especially simple and advantageously made at the rear end of the ribbed sections. Since the ribbed sections are generally located at more or less uniform distances from each other along the height of the inner tank, the undercuts are also distributed more or less uniformly in height and guarantee uniform, strong lid attachment.

A particularly reliable fastening of the lid is obtained if the vertical edges of the lid engage with a groove, bounded on one side by a notch, and on the other hand by the contact surface.

At least one of these abutment surfaces is preferably formed by a step integrally formed from an internal reservoir.

The second abutment surface may be provided by a refrigerant pipe, the refrigerant pipe passing between the evaporation chamber and the compressor chamber of the refrigeration apparatus. Such a refrigerant pipe coated with a liner to which the lid abuts may, for example, comprise a pressure pipe and a suction pipe for the refrigerant.

Such a refrigerant pipe extending on the inner side of the inner tank is useful especially when the inner tank covers the storage chamber and the evaporation chamber together, and both are separated from each other by an intermediate wall introduced into the inner tank.

In order to be able to make the thickness of the insulating layer surrounding the inner tank at given external dimensions as large as possible, the air channel expediently has an elongated cross section. In this case, the longitudinal side of the cross section is preferably made due to the cover. In order to stabilize the cross section of the air channel, the lid can be held on supports that cross the air channel in the transverse direction. Fastening with these supports can be particularly effective in preventing the cover from bending, and because of this, its longitudinal edges will be out of engagement with the undercuts.

If the second longitudinal side of the cross section is formed by the inner reservoir, the supports can be made simply and economically on this second longitudinal side integrally with the inner reservoir.

If the supports are located near the opening for the passage of cover air downstream of the opening for the passage of air, then the resulting pressure of the air flow in the air channel contributes to the exit of air through the holes for the passage of air into the storage chamber.

High stability of the supports can be achieved by giving them a conical appearance.

According to a preferred embodiment, the lid is movable between a position in which it engages with a recess formed on the intermediate wall between the evaporation chamber and the storage chamber, and a position in which the lid and the intermediate wall are spaced apart. Thus, when mounting the lid, it is possible to first engage it in the undercuts, and then slide it to create engagement in the recess, and thus hold the lid on three sides.

In the extended position, the connections to the supply lines of the evaporation chamber, which are usually hidden behind the lid, can be opened between the separation wall and the lid. This allows easy access and unscrewing of the connections, if it is necessary for maintenance or repair work on the devices of the evaporation chamber.

In the engaged position, the lid is preferably held by disconnecting means.

In order to guarantee the possibility of the cover sliding, but avoiding the deflection of the cover, which can lead to loss of engagement in the undercuts, other fasteners can be provided that engage with the bearings and pass through the elongated openings of the cover.

Brief Description of the Drawings

Other features and advantages of the invention result from the following description of embodiments with reference to the accompanying drawings. They show the following.

Figure 1: vertical section through the refrigeration apparatus of the present invention.

Figure 2: horizontal section along the refrigeration apparatus along line II-II of figure 1.

Figure 3: axonometric projection of the inner tank and the lid in an unbound state.

Figure 4: a perspective view of a fragment of the inner tank and the lid, which shows the supports made on the rear wall of the inner tank for the lid, as well as notched rivets provided for attaching the lid to the supports.

5: a perspective view of a fragment of the inner tank and the lid, and in this form, the lid is located at a distance from the separation wall between the storage chamber and the evaporation chamber.

The implementation of the invention

Figure 1 shows a schematic vertical section through a refrigerating apparatus according to the present invention. The refrigeration unit has a body 1 and a door 2, which are formed in the traditional way due to the strong outer skin 3 and made of plastic by deep drawing of the inner wall, designated in the case of case 1 as the inner tank 4, and also due to the insulating layer 5 enclosed between these parts foam material. The inner space of the inner tank 4 is also divided by means of a heat-insulating partition wall 6 into the evaporation chamber 7 and the storage chamber 8. The inlet 9, through which air enters from the storage chamber 8 into the evaporation chamber 7, is made on the edge of the partition wall 6 facing the door 2. Located in the evaporation chamber 7, the evaporator 10 is connected to the compressor 12 and the condenser by a refrigerant pipe 11 (see FIG. 2), which are located in a niche 13 in the lower rear region of the housing 1.

In the evaporation chamber 7 there is, in addition, a fan 14 with a vane wheel 15 and an engine 16. The fan 14 draws air from the evaporator 10 and pumps it through the outlet 17 between the rear edge of the separation wall 6 and the rear wall 18 of the inner tank into the air channel 19. The air channel 19 extends downward between the rear wall 18 of the inner tank and the plate-shaped lid 20.

On the side walls 21 of the inner tank 4 at equal distances and lying in pairs opposite each other, ribbed sections 22 are made by deep drawing of the inner tank. In this case, each ribbed section contains two horizontal ribs 23, 24, between which passes a groove 25, which is provided in order to in a known manner to receive the edges of the shelf not shown in the figure or the guide of the drawer. At the end of the upper rib 23 closest to the rear wall 18, each rib section 22, with the exception of the rib section lying closest to the dividing wall 6, has a pin 26. The back side of each pin 26 forms an undercut 27, on which the vertical edges of the lid are held with a geometric closure 20. To fasten the lid 20 are, in addition, conical supports 28 made of the rear wall 18 of the inner tank, and their points touch the lid 20 along a vertical middle plane slightly offset relative to the plane of the incision 1, and in which by means of rivet 29 is held under the flaring cover 20. In Figure 1 only visible rivet head.

In the embodiment shown here, slotted holes 30 are made in the lid 20 at equal distances from each other, through which cold air from the air channel 19 enters the storage chamber 8. At least one opening 30 is associated with each compartment of the storage chamber between two shelves, through which the compartment is supplied with cold air.

Figure 2 shows a horizontal section of the rear region of the inner tank 4 and its surroundings with the plane indicated II-II in figure 1. The cut plane passes through one of several conical trunnions 26 and a rivet 29, which, passing through the vertical elongated hole of the cover 20, fixes the latter on the support 28. The lateral edges of the cover 20 are held in grooves, one side of which is made by undercut 27 of one of the trunnions 26. The other lateral side of the groove is formed at the upper (in FIG. 2) edge of the lid 20 due to a ledge 31 integrally formed on the rear wall 18, delimiting the air channel 19 from the side. In the case of the lower edge, the other side of the groove is made by the refrigerant pipe 11. This refrigerant pipe 11, embedded in an insulating solid foam body 32, comprises a suction pipe 33 through which vaporized refrigerant flows from the evaporator 10 to the compressor 12, as well as a pressure pipe 34 passing at the height of section II-II inside the suction pipe 33. This pressure pipe 34 delivers liquid refrigerant from the condenser to the evaporator 10. The electric wire 40 or cable butcher passes in the section plane of FIG. 2 outside the body 32. Under the plane of the section, butchering can also be carried out inside the body, and thus, all the wires can be held together and sealed at the lower end of the air channel through one single passage of the inner tank 4.

Refrigerant pipe 11 crosses the inner reservoir 4 at the height of the lower end of the air duct 19.

Figures 3 and 4 show a perspective view of the upper region of the inner tank 4 and the lid 20 separately from each other. The cover 20 is a substantially rectangular flexible plate made of metal or plastic. Two upward projections 35 of small height are made at the upper corners of the cover 20. The protrusions 35 are provided in order to engage in two grooves, which are made outside the cut plane of FIG. 1 on the lower side of the dividing wall 6, and thereby fix the lid 20 in the depth direction of the housing 1 in the position shown in FIG. Next to the protrusions 35, the lid has two openings 36, which are designed to receive, with the possibility of separation, a rivet, bolt or other suitable fastening element 37 (see also FIG. 1), which holds the lid 20 motionless in a position in which the protrusions 35 are engaged with the grooves of the separation wall 6.

The already mentioned elongated holes through which rivets 29 pass, which hold the cover 20 on the supports 28, are indicated by pos. 38.

The holes 30 are located, with the exception of the uppermost hole, in groups of three holes, and these groups of holes extend over almost the entire width of the cover 20. Each group of holes is associated with one of several compartments of the storage chamber, which are delimited from each other by a pair of ribbed sections 22 or shelves, carried by these ribbed sections. The uppermost group contains only one hole 30, since, as can be seen from figure 3, the width of the air channel 19 in its upper section increases from top to bottom only gradually due to the width of the ledge 31. This creates a continuous transition from the passage 17 for release air, the width of which essentially corresponds to the diameter of the impeller 15, to the air channel 19.

If the lid 20 is mounted on the inner tank and the fasteners 37 are removed, the engagement of the rivets 29 in the elongated holes 38 allows the lid 20 to be moved down to the position shown in FIG. 5, in which the protrusions 35 are disengaged from the grooves on the rear lower edge of the separation walls 6. Thus, the user can access the air channel 19 through the gap 39 between the upper edge of the cover 20 and the rear lower edge of the separation wall 6. The user can bend a portion 41 of the cover 20 above the uppermost rivet 29 so as to open the upper section of the air channel 19 and laid therein outside the body 32 equipped with plug-in connections of the wire 40 (see figure 2). Between the niche 13 of the compressor and the evaporation chamber 7, the electrical signals transmitted via wires 40, such as, for example, temperature measurement signals or the supply current of the fan 14, can thus be conveniently removed from the connectors and checked in case of a malfunction in the refrigeration unit, or interrupted. In this case, it is not necessary to open the evaporation chamber 7 or move the apparatus from the place where it stands in order to gain access to the niche 13 of the compressor.

Claims (15)

1. A refrigerator without freezing frost containing an evaporation chamber (7), an internal reservoir (4) and a lid (20), which in the inner reservoir separates the storage chamber (8) from the air channel (19) associated with the evaporation chamber (7) characterized in that the lid (20) is held in the undercut (27) made integrally on the inner tank (4) by deep drawing of the inner tank (4). 2. The refrigeration apparatus according to claim 1, characterized in that in the cover (20), in its cross section, openings (30) are distributed for the passage of air through which the air channel (19) is connected to the storage chamber (8). 3. The refrigeration apparatus according to claim 1, characterized in that ribbed sections (22) are made on the side walls of the inner tank (4), containing at least one rib (24) for supporting the shelf for refrigerated products, and an undercut (27) ) is made at the rear end of the ribbed sections (22). 4. The refrigeration apparatus according to one of claims 1 to 3, characterized in that the vertical edges of the lid (20) engage with a groove, bounded on one side by a notch (27), and on the other, by the contact surface. 5. The refrigeration apparatus according to claim 4, characterized in that at least one of the abutment surfaces is made due to a step (31) integrally formed from the inner reservoir (4). 6. The refrigeration apparatus according to claim 4, characterized in that at least one of the abutment surfaces is formed by a refrigerant pipe (32), the refrigerant pipe (32) passing between the evaporation chamber (7) and the compressor chamber (13) . 7. The refrigeration apparatus according to claim 6, characterized in that the storage chamber (8) and the evaporation chamber (7) are limited by the internal reservoir (4) and are separated from each other by an intermediate wall (6) inserted into the inner reservoir (4). 8. The refrigeration apparatus according to one of claims 1 to 3, 5-7, characterized in that the air channel (19) has a cross section elongated in length, the longitudinal side of the cross section being made by a cover (20) and a cover (20) ) is held on supports (28) that cross the air channel (19) in the transverse direction. 9. The refrigerator according to claim 8, characterized in that the second longitudinal side of the cross section is formed by the inner reservoir (4), and the supports (28) are made on the second longitudinal side integrally with the inner reservoir (4). 10. The refrigeration apparatus according to claims 2 and 9, characterized in that the supports (28) are located next to the hole (30) for the passage of air downstream from the hole (30) for the passage of air. 11. The refrigerator according to claim 9, characterized in that the supports (28) have a conical shape. 12. A refrigerator without freezing frost containing an evaporation chamber, an inner reservoir (4) and a lid (20), which in the inner reservoir separates the storage chamber (8) from the air duct (19) associated with the evaporation chamber (7), in particular according to one of claims 1 to 3, 5-7, also containing an intermediate wall (6) that separates from each other the storage chamber (8) and the evaporation chamber (7), characterized in that the cover (20) is movable between the position in which it engages in the formed on the intermediate the wall (6) has a recess, and the position in which the cover (20) and the intermediate wall (6) are spaced apart. 13. The refrigerator according to claim 12, characterized in that in the extended position there is access to the connections of the supply piping of the evaporation chamber between the dividing wall and the cover. 14. The refrigeration apparatus according to claim 12, characterized in that in the engaging position, the cover (20) is preferably held by fastening means (37), which are made with the possibility of separation. 15. The refrigeration apparatus according to claim 12, characterized in that the fastening means (29) included with the engagement in the supports (28) pass through the elongated holes (38) of the cover (20).

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