EP2297535B1 - Refrigerator - Google Patents

Abstract

The invention relates to a refrigerator containing a valve (84), the refrigerant originating from the cooling circuit entering said valve, a tube (80) having an outlet (82) leading towards the cooling circuit, and an evaporator (50) which consists of a plurality of windings on a refrigerating surface. The refrigerator further comprises a tube (80), a primary extension (62) between the valve (84) and the outlet (82) and at least one primary supporting surface (60) that is connected to the primary extension (62) to form an auxiliary cooling element.

Description

The invention relates to a refrigerator with a multi-layer cooling area, which consists of a support grid and evaporators with a tube which is fixed in turns on the support grid.

STATE OF THE ART

In the cooling circuit of a refrigerator, a gaseous refrigerant, which evaporates at low temperatures, is compressed by a compressor and liquefied. The heated, liquid refrigerant is passed through a condenser in the evaporator. The evaporator generally consists of a continuous flat tube structure having an inflow and outflow opening, a support grid consisting of many intermittent and parallel wires and fixing the flat tube structure to the bottom, and an expansion valve located at the aforementioned inflow opening is appropriate. The refrigerant entering the expansion valve passes through the flat tube structure and is converted into gas as a result of the volumetric expansion. As the refrigerant absorbs energy within this process, it cools the outside temperature and directs the cold air into the refrigerator compartment using the evaporator fan.

As the freezer area requires more cooling, some refrigerators use evaporators that consist of a continuous tube and multiple flat tube layers to cool each compartment from below and from above.

In patent GB2145806 An invention will be described as an example of such a structure. However, evaporators containing flat tube layers made by the method in question must use an ancillary apparatus and assistive technologies to obtain greater than normal cooling performance with the existing device.

The document US 2,633,003 describes a refrigerator with several series-arranged evaporators, wherein the evaporators have a multi-curved shape. ES discloses a cooling device according to the preamble of Ansprunchs first

The document DE 10 14 565 B shows a refrigerator with a metallic insert that forms walls of the refrigerator.

BRIEF DESCRIPTION OF THE INVENTION

The present invention is an evaporator auxiliary that is used in the freezer compartment of a refrigerator and eliminates the above-mentioned disadvantages and provides new advantages for the relevant technical field.

The main object of the invention is to increase the cooling activity of a refrigerator operating with a refrigeration cycle.

Another object of the invention is to provide additional cooling of areas which require more cooling due to heat loss in the refrigerators.

The present invention, which fulfills the objects set forth above and in the detailed description below, is a cooling device having the features of claim 1.

In the structure of the invention, the tube is characterized by at least one primary airfoil attached to said primary extension to form a primary extension between valve and outlet and an additional cooling element. In this way, additional cooling is ensured because the primary wing z. B. is connected to a surface that requires additional cooling.

In the structure of the invention, said primary airfoil is characterized by at least one mounting arc on the side to ensure connection to the pipe. The arc surrounds the tube, thus increasing the heat transfer surface between the tube and the primary airfoil.

In the preferred structure of the invention, the primary airfoil is generally perpendicular to the evaporator. While z. B. the horizontal evaporator cools the floor or the ceiling of the refrigerator can be cooled in this way by means of a wing, the side wall in the vicinity of the floor or the ceiling.

In the preferred structure of the invention, said primary airfoil is characterized by at least one secondary extension extending on the other side of the primary airfoil to connect the primary airfoil to the pipe from the other side. In this way, the support surface is connected to the tube on two opposite sides, so that the heat transfer surface between the tube and the support surface is increased.

The preferred structure of the invention is characterized by at least one secondary airfoil between the primary airfoil and the exit.

In the preferred structure of the invention, said evaporator is located between primary and secondary airfoils. In this way, the evaporator and wings can cool three adjacent sides in the refrigerator.

In the preferred structure of the invention, said primary airfoil is located between the valve and the evaporator. In this way, at the location where the heat of the refrigerant exiting the valve is lowest, the heat transfer into the primary airfoil can take place.

In the preferred structure of the invention, said primary and secondary extensions are basically parallel to each other. In this way, e.g. a rectangular airfoil can be attached in between.

The preferred structure of the invention includes at least one secondary intermediate evaporator mounted between said secondary airfoil and the exit.

In the preferred structure of the invention, said evaporator is basically in a vertical position between the secondary and primary support surfaces, which are basically arranged parallel to one another.

The structure of the present invention and the additional elements, together with the illustrations described below, must be evaluated to better understand the advantages.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 shows the perspective view of the evaporator, which is the subject of the invention.

REFERENCE NUMBERS

10

fridge

11

front

12

ground

14

Side wall

16

blanket

18

back

20

Bodenevaporator

22

pipe

24

rust

30

first intermediate evaporator

40

second intermediate evaporator

42

entrance

50

upper evaporator

52

bend

54

entrance arch

55

initial sheet

60

primary wing

62

primary extension

64

secondary extension

66

vertical extension

67

initial sheet

68

extension bend

69

entrance arch

70

secondary wing

72

hole

74

mounting sheet

76

output

80

pipe

82

output

84

Valve

DETAILED DESCRIPTION OF THE INVENTION

In this detailed description, the novelty of the invention will be explained by way of examples, which by no means affect the understanding. The description below is for refrigerators where the refrigerator is down. However, the invention can also be applied to any domestic or industrial refrigerator in a similar manner.

As can be seen in Fig. 1, each with a container (not shown in the figure), which are basically parallel to each other at the bottom (12) of a refrigerator (10), an evaporator (20) connected, the one Grate (24) consists of a long, coiled tube (22) and arranged in parallel thereon and attached rods. The structure in Fig. 1 has in sequence from bottom to top a bottom evaporator (20) near the bottom (12), a first Zwischenevaporator (30), a second Zwischenevaporator (40) and an upper evaporator (50) in the vicinity of Ceiling (16). The evaporators (20, 30, 40, 50) consist of a continuous tube (80), which winds several times U-shaped.

The expansion valve (84) at the inlet of the tube (80) and the outlet (82), which is parallel and in the vicinity of the expansion valve, are located below the upper evaporator (50). The tube (80) leading from the expansion valve (84) extends parallel to the back (18) towards a side wall (14) and forms a primary extension (62) parallel to the side wall (14) by being in an inlet bend (69) turns. The primary extension (62) leads with an arc parallel to the front (11) in the direction of the ceiling (16) and thus forms a vertical extension (66), which in turn with another arc in the back (18) extends and so a secondary extension (64) forms. By bending over the secondary extension (64) with an exit arc (67), it extends parallel to the rear face (18) and looks towards the other side wall (14). At this point, it connects to an extension bend (68), changes its direction towards the ceiling (16), runs parallel to the back (18) and changes direction with an entrance arch (54) towards the front (11). In this way, the tube (80) forms a U-shape on the side wall (14) and connects from here to the upper evaporator (50). Between the primary and secondary extensions (62, 64), which form the two sides of the U-shape, a primary support surface (60) in the form of an aluminum plate is fixed on both edges.

The upper evaporator (50) consists of the tube (80) extending in multiple bends (52) parallel to the ceiling (16). The tube (80) in the evaporator (50) extends with an exit arc (55) in the vicinity of the side wall (14), which is in opposite distance of the entrance sheet (54), in the direction of the bottom (11).

From here, the tube (80) continues and forms a secondary support surface (70) in a U-shape, which is constructed in the same way as the primary support surface (60) and whose ends look towards the rear side (18). The tube (80), which changes its direction at an exit (76) of the secondary wing (70) with a bow towards the bottom (12) and runs parallel to the back (18), connects to an inlet (42) with the second intermediate evaporator (40). The tube (80) in turn forms the second intermediate evaporator (40), the first intermediate evaporator (30) and the bottom evaporator (20) and returns from here parallel to the back (18) to the outlet (82).

At the secondary support surface (70), as at the primary support surface (60), by bending the upper and lower edges, mounting arches (74) are formed. The upper and lower mounting arches (74) sequentially surround the tubular primary and secondary extensions (62, 64) and secure the airfoils (60, 70) to the tube (80). As the refrigerant passes through the tube (80), it cools the primary and secondary wings (60, 70) by heat conduction and forms on the side walls (14) a cold area.

This ensures that the area between the upper evaporator (50) and the second Zwischenevaporator (40) is not only cooled from above and below, but also from the side walls (14) and thus from all four sides. In addition, because the wings (60, 70) are near the valve (84), they ensure the transfer of the lowest calorific value of the refrigerant. Further, because they are near the upper evaporator (50), they help lower the temperature of the freezer area, which must be effectively cooled. The holes (72) in the rectangular aluminum plates forming the primary and secondary airfoils (60, 70) cause the metal plates to be less affected by thermal expansion.

Since the primary airfoil (60) is directly connected to the valve (84), an additional cooling element is formed in the left upper corner of the refrigerator (10), which has a large heat loss. In alternative applications, the primary airfoil (60) may also be installed at other locations where the cooling loss in the refrigerator is greatest.

The scope of the invention is set forth in the appended claims and is not limited to the matters which will be set forth in this detailed description for purposes of illustration. One skilled in the art will be able to set forth similar structures in light of the above and without departing from the main scope of the invention.

Claims (9)

1. Cooling appliance with an evaporator (50), wherein the evaporator is represented on a cooling surface in multiply bent form, the cooling surface is mounted on a pipe (80), the cooling liquid coming from a refrigerant circuit enters the pipe (80) through a valve (84) and is fed back from the pipe outlet (82) to the refrigerant circuit, wherein the pipe (80) is connected between valve (84) and outlet (82) with a primary extension (62) and at least one primary support surface (60) is, for formation of an auxiliary cooling element, connected with the said primary extension (62), characterised in that the primary support surface (60) is characterised at least by a fastening bend (74), which is formed at the side, so as to ensure connection with the pipe (80).
2. Cooling appliance according to claim 1, characterised in that the said primary support surface (60) is mounted perpendicularly relative to the evaporator (50).
3. Cooling appliance according to claim 1 or 2, characterised in that for fastening the primary support surface (60) by another side to the pipe (80) the appliance is characterised along the other side of the primary surface (60) by at least one secondary extension (64).
4. Cooling appliance according to any one of the preceding claims, characterised in that it is characterised between primary support surface (60) and outlet (82) by at least one mounted secondary support surface (70).
5. Cooling appliance according to claim 4, characterised in that the said evaporator (50) is positioned between primary and secondary support surfaces (60, 70).
6. Cooling appliance according to any one of the preceding claims, characterised in that the said primary support surface (60) is mounted between valve (84) and evaporator (50).
7. Cooling appliance according to claim 3, characterised in that primary and secondary extensions (62, 64) are arranged basically parallel to one another.
8. Cooling appliance according to claim 4, characterised in that at least one secondary intermediate evaporator (40) is mounted between the said secondary support surface (70) and the outlet (82).
9. Cooling appliance according to claim 4, characterised in that the said evaporator (50) is arranged between the secondary support surface (70) and the primary support surface (60), which are arranged basically parallel to one another, and basically in perpendicular setting relative to the support surfaces (60, 70).

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