RU2411429C2 - Refrigerating device without frost buildup - Google Patents

Abstract

FIELD: personal use articles. ^ SUBSTANCE: refrigeration device without frost buildup comprises evaporator, tubular heater and carrier, which carries evaporator and tubular heater. Tubular heater includes multiple parallel sections. Sections are joined to each other as a whole. Beginning and end of tubular heater are located at two directly neighbouring parallel sections. ^ EFFECT: convenient storage of large quantity of cooled products. ^ 7 cl, 6 dwg

Description

Technical field

The present invention relates to a refrigeration apparatus without freezing frost.

State of the art

The device, due to which it is possible to implement such a refrigeration apparatus, usually contains a carrier on which the evaporator and heater are located. This device is mounted in the refrigerator compartment of the refrigerator near the ceiling to delimit the compartment and is connected to the refrigerator compartment or coolers due to forced ventilation. The separation of the evaporator chamber from the refrigerating chambers allows the evaporator to be heated with forced ventilation turned off by means of a heating device, so that the ice that precipitates on the evaporator during operation of the refrigeration unit is thawed.

In a known device of this kind, the heater is made in the form of a tubular heater, i.e. in the form of a pipe in which a conductor with poor electrical properties is located, which can be used for heating by current. In the known tubular heater, the pipe is laid in a zigzag fashion on a heat-conducting metal sheet, i.e. it has many parallel sections, of which two adjacent are connected by a pipe elbow. As a result of this, the beginning and end of the pipe are at opposite edges of the heat-conducting metal sheet. In order to bring together the electrical supply wires connected to the two ends of the pipe and lead them out of the housing together, at least one of these supply wires must be laid in the housing at a distance corresponding to the length of the edge of the heat-conducting sheet and fixed. This circumstance requires an additional operation after mounting the tubular heater in the housing.

Disclosure of invention

The objective of the present invention is to create a refrigeration apparatus without freezing frost, containing an evaporation device, in which there is no need to carry out the specified operation.

According to the invention, the beginning and end of the tubular heater are located on two parallel sections of the heater pipe directly adjacent to each other, the electrical supply wires connected to them can be removed from the evaporation chamber in a short way that does not require separate fixing of the supply wires.

In order to arrange the beginning and end of the tubular heater in parallel sections of the heater pipe, it is preferable that two parallel sections that are on opposite sides of the tubular heater are directly connected to each other by a pipe elbow.

In the first embodiment, this pipe elbow extends in the same plane as the parallel sections of the heater pipe. In this case, the elbow of the pipe can be placed, as well as parallel sections, under the evaporator and heat it from below.

According to a second embodiment, the pipe elbow extends out of the plane of parallel sections of the tubular heater, preferably at the end of the evaporator along or across the evaporator.

To simplify the installation of the tubular heater, it is fixed preferably at the height of the pipe elbows connecting the parallel sections of the heater pipe on the protrusions of the carrier. Such fixation may make it unnecessary to use in particular a traditional heat-conducting metal sheet as a support for a tubular heater.

The protrusions preferably consist of at least a first protrusion that is adjacent from the outside to the middle portion of the pipe elbow and a second protrusion that is adjacent from the inside to both ends of the pipe elbow, at the transition between the pipe elbow and the parallel pipe sections connected thereto. This second protrusion can also be divided into two separate protrusions adjacent to each end of the pipe elbow.

In order to fix the tubular heater to the carrier, the first protrusion preferably forms a hook covering the elbow of the pipe.

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: a schematic section of the upper region of the refrigeration apparatus without freezing the frost of the present invention.

Figure 2: view of the tubular heater according to the first embodiment of the invention.

Figure 3: axonometric projection of a tubular heater according to the second embodiment.

Figure 4: the tubular heater of figure 2 mounted on a carrier.

5: a fragment that shows the installation of a tubular heater according to a modified embodiment.

Fig.6: sectional view of the fragment of Fig.5.

The implementation of the invention

Figure 1 shows a schematic section of the upper region of a refrigerator without freezing the frost of the present invention. The refrigerator has a housing 1 and a door 2, which are made in the traditional way in the form of a hollow body filled with a heat-insulating layer 3 of foamed material. Due to the heat-insulating separation wall 4, the inner space of the housing 1 is divided into an evaporation chamber 5 and a refrigeration compartment 6. The separation wall 4 is formed by the bottom of the carrier 7 for the evaporation device, and the known plate evaporator 8 is mounted on the carrier 7 by itself. The carrier 7 is mounted at a distance from the ceiling of the housing 1 and together with the side walls of the housing 1 limits the evaporation chamber 5. The carrier 7 has an inlet 9 for air inlet located on its side, about facing the door 2, as well as an exhaust outlet 10 for discharging air located on its side 16 facing the rear wall of the housing 1. In the rear region of the evaporation chamber 5, behind the outlet 10 of the carrier 7, there is a fan 11 with an impeller 12 and an engine 13, which draws air from the evaporation chamber 5 and pumps it into the air channel 14.

In figure 1, the air channel 14 passes only through the dividing wall 4 and enters the refrigerating compartment 6 lying directly below it. Alternatively, the air channel 14 can also be laid inside the rear wall of the housing 1 and provided with many through holes to the refrigerating compartment 6, through which cold air flowing in the air channel is evenly distributed over the height of the refrigerator compartment 6. Further, a valve can be provided in the air channel 14 that directs the flow of cold air through the chnym ramifications air channel to choose one of many branches of the refrigerating appliance, such as refrigerating compartment 6 and not shown in the freezer compartment.

Figure 2 shows a perspective view of a tubular heater 20 located on the carrier 7 below the evaporator 8. The tubular heater 20 comprises a plurality of straight sections 21a, b, c, ... parallel to each other, each of which, except for the rear left portion 21a, is connected directly adjacent section 21 using the pipe elbow 22. Section 21a is connected to the front right rectilinear section 21r by an elongated elbow 23 of the pipe, which extends over the entire width of the tubular heater 20. The beginning and end of the tubular heater 20 are located in adjacent parallel sections 21a, b, and thus together, along the shortest path, connected supply wires 24 can be led out of the evaporation chamber 5. The dotted rectangular parallelepiped above the tube heater 20 means the evaporator 8. The evaporator 8 can be, for example, It is known per se and not shown here in detail plate evaporator which is arranged with the plates extending parallel to or perpendicular to portions 21.

Figure 3 shows a modified embodiment of a tubular heater 20, in which an elongated elbow 23 of the pipe is removed from the plane of the sections 21 and passes in front of the side of the evaporator 8 facing the hole 10 for the release of air.

Figure 4 shows in a perspective view the tubular heater 20 of figure 2 mounted on the carrier 7. Sections 21 lie on the plate 25 of the base of the carrier 7, which is slightly inclined from the front wall 26 surrounding the inlet 9, towards the edge 27. For edge 27 is followed by a strongly inclined portion 28 and a groove 29, in which - since it is the deepest region in the base plate 25 - meltwater flows from the evaporator 8 and flows through the hole 30 in the groove floor to the evaporator, which itself is It is known and is not described here. Each of the pipe elbows 22 facing the back side 16 of the carrier 7 of the pipe 22 is fixed on the base plate 25 using a group of three trunnions 31, one of which touches the peak point on the pipe elbow 22 and the other two abut the pipe elbow in the region transition to straight sections 21. Due to these three trunnions 31, the horizontal position of each elbow 22 of the pipe is precisely determined.

Four branched supporting elements 32 spaced apart from the base plate 25 are provided to attach the evaporator 8 to them, while the refrigerant-containing evaporator tube is inserted into the branching of the supporting elements 32 and fixed in the expansion of the branching.

FIG. 5 shows a fragment of the base of the carrier 7 in the region of the edge 27 according to an embodiment slightly different from that shown in FIG. 4, and in this embodiment, two trunnions 31 touching the inside of the pipe elbow 22 are replaced by a wide, tapering upward protrusion 33, and the trunnion 31, touching the top of the elbow 22 of the pipe, has a recess 34, which is better visible in the section of Fig.6 and which includes the elbow 22 of the pipe. The tubular heater 20 is mounted in such a way that at first its pipe elbows 22 adjacent to the rear wall are placed vertically, as shown in FIGS. 5 and 6 by a dotted line, on a portion 28 of the base plate 25. It doesn’t matter that the pipe elbow 22 is located exactly symmetrical with respect to the journal 31 and the protrusion 33. It will be enough if the straight sections 21 adjacent to the pipe elbow 22 lie on different sides of the protrusion tip 33. When the tubular heater 20 rotates relative to the base plate 25 to the position indicated in the drawing by a continuous line, the pipe elbow is automatically centered on the protrusion 33, and thus its top is exactly lying in the recess 34 of the pin 31.

Due to the recess 34, the pin 31 acts as a hook that prevents the pipe elbow 22 from rising in section 28. The wide protrusion 33 prevents the pipe elbow from shifting to the left in FIG. 6, and thus the pipe elbow cannot disengage in the recess 33, and thus, the tubular heater 20 is rigidly locked.

The front pipe elbows 22 facing the air inlet 9 can be blocked on the base plate 25 similarly to the pipe elbows shown in FIGS. 5 and 6, and of course, in these last protrusions, the recess in which the top of the pipe elbow enters must be very flat to facilitate the clamping of the pipe elbows 22 'between the pins and the protrusions in a horizontal position.

Due to various tilts of the base plate 25 in front of and behind the edge 27, the finally mounted tubular heater 20 is under bending stress, which prevents the tubular heater from rattling due to vibration arising during operation of the refrigeration apparatus.

Claims (7)

1. A refrigeration apparatus without freezing frost containing an evaporator (8), a tubular heater (20) and a carrier (7), a supporting evaporator (8) and a tubular heater (20), and the tubular heater (20) includes many parallel sections ( 21; 21a-21r), connected with each other as a whole, characterized in that the beginning and end of the tubular heater (20) are located on two directly adjacent parallel sections (21a, 21b). 2. The refrigeration apparatus according to claim 1, characterized in that two parallel sections (21a, 21r) are directly connected to each other on opposite sides of the tubular heater using a pipe elbow (23). 3. The refrigeration apparatus according to claim 2, characterized in that the elbow (23) of the pipe lies in the same plane as the parallel sections (21; 21a-21r). 4. The refrigeration apparatus according to claim 2, characterized in that the elbow (23) of the pipe lies outside the plane of the parallel sections (21; 21a-21r). 5. The refrigerator according to one of the preceding paragraphs, characterized in that the tubular heater (20) is fixed preferably at the height of the elbows (22) of the pipe connecting the parallel sections (21; 21a-21r) on the protrusions (31, 32) of the carrier (7 ) 6. Refrigeration apparatus according to claim 5, characterized in that the protrusions (31, 32) consist of at least a first protrusion (31), which is adjacent from the outside to the middle portion of the elbow (22) of the pipe, and a second protrusion (31, 32), which is adjacent from the inside to both ends of the elbow (22) of the pipe. 7. The refrigeration apparatus according to claim 6, characterized in that the first protrusion (31) forms a hook covering the elbow (22) of the pipe.

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