RU2406046C2 - Refrigerant apparatus and evaporator for melt-water for this device - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: evaporator for melt-water is equipped with a tray for taking melt water. Above the tray at a distance from it through an air gap at least one intermediate storage for melt-water with an open water surface is located. Intermediate storage includes a second tray and a plate equipped with a surface contour, which collects melt-water due to capillary effect. The plate is the bottom of the second tray. The surface contour accumulating melt-water is made on the underside of the bottom.

EFFECT: improvement of efficiency of evaporation.

6 cl, 5 dwg

Description

Technical field

The present invention relates to a melt water evaporator and to a refrigeration apparatus equipped with a melt water evaporator in order to eliminate melt water that accumulates during operation of the refrigeration apparatus on its evaporator.

State of the art

Typically, under the evaporator in the case of such a refrigeration unit, there is a drain tray or a drain pan that receives melt water flowing from the evaporator and which is connected through an opening in the refrigerator body to an outside evaporator tray into which condensate can drain and in which it can evaporate. The evaporation tray is usually mounted on the compressor of the refrigeration unit, so that with the waste heat generated during compressor operation, the condensate is heated in the evaporation tray and thus accelerate the evaporation of condensate.

In recent years, considerable efforts have been made to improve the energy consumption of refrigeration units due to efficient insulation and optimization of the efficiency of refrigeration units of such refrigeration units. This has led to the fact that in modern refrigerating appliances the share of the compressor operating time in the total operating time of the refrigerating appliance, as well as the compressor waste heat productivity during its operation, became less. The waste heat used to heat the melt water is less in modern refrigeration appliances than in older appliances. However, when the lack of waste heat leads to the fact that the water in the evaporation pan evaporates more slowly than it comes from the evaporator, the evaporation pan eventually overflows. Thus, water escapes from it, which can lead to damage to the device and its surroundings. It is not advisable to create an additional source of thermal energy to accelerate evaporation, as this will increase the specific energy consumption of this unit.

A well-known solution to achieve effective evaporation is the use of an evaporation tray, made on the principle of terraces. The base of such a pallet by means of dividing walls is divided into many containers, which differ in height of the base of the pallet. Melt melt is first supplied to a container that lies above all, and only when it is filled to the edge of its dividing walls can water flow from there to an adjacent container below. The effect of this principle of terraces is based on the fact that in each tank the water depth can be small, and thus, the available heating power heats only a small amount of water, but to a higher temperature than in the case of an evaporation tray created not by the principle of terraces, where the depth of the water in places can be significantly greater. High temperatures promote efficient evaporation. However, the free water surface on which evaporation may occur, in the case of a pallet made on the principle of terraces, is not greater than in the case of a pallet made not on the principle of terraces. In order to further improve the efficiency of evaporation, it will be desirable to create a melt water evaporator in which the available free water surface can be made larger than the base occupied by the evaporator.

Disclosure of invention

This problem is solved using a melt water evaporator with a tray for receiving melt water, and at least one intermediate drive for melt water is located above the tray at a distance from it, which collects melt water with an open water surface. Thus, evaporation can occur already in the intermediate tank, and only melt water, which is no longer evaporated in the intermediate tank, enters the sump. Due to the air gap between the pallet and the intermediate tank, the evaporation in the pan is not limited, or at least not substantially limited.

According to a first embodiment, the intermediate storage device comprises a second pallet.

The second pan preferably has a spillway vertically spaced from the bottom of the pan, the distance from the bottom to the spillway determines the maximum water level in the second pan. The maximum water level is preferably substantially a few millimeters.

According to a second embodiment, it is provided that the intermediate storage device comprises a plate provided with a surface contour that accumulates melt water due to the capillary effect.

It is possible to combine both embodiments in such a way that the plate from the second embodiment will be formed by the bottom of the second pallet from the first embodiment, and the melt water collecting surface contour is made on the bottom side of the bottom. Thus, not only the upper side of the second pan, but also its lower side can be used to evaporate melt water.

Advantageously, the plate is provided with at least one passage for melt water, and the surface contour contains at least one groove emerging from the passage. Due to the capillary action, the groove can supply melt water to the passage or divert it from the passage. The passage can be implemented in particular in the form of a hole passing through the plate, or in the form of a groove made on the edge of the plate.

The subject of the invention is also a refrigeration apparatus, which is equipped with an evaporator of melt water of the type described above. Such a melt water evaporator is preferably located on the compressor of the refrigeration apparatus in order to efficiently use the waste heat of the compressor. If the refrigeration unit is equipped with a fan, then it will be further advisable if the melt water evaporator is located in the path of the air flow produced by the fan.

Brief Description of the Drawings

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

figure 1: schematic section through a refrigerating apparatus of the present invention;

figure 2: axonometric extended projection of the evaporator of melt water of the refrigeration apparatus of figure 1;

figure 3: a modified embodiment of the second pan of the evaporator of melt water in figure 2;

figure 4: bottom view of the pallet depicted in figure 3;

5: a perspective view of an intermediate accumulator of melt water for an evaporator of melt water according to another embodiment of the invention.

The implementation of the invention

The refrigerator, shown schematically in FIG. 1 in section, comprises a heat-insulating casing with a housing 1 and a door 2 attached thereto, which define an internal space 3. On the rear side of the internal space 3, divided into sections by the bases 4 of the shelves, the chamber 6 is separated, which is located plate evaporator 5. The chamber 6 is connected to the inner space 3 through the holes 7 of the rear wall. The refrigerant circuit passes from the high pressure outlet of the compressor 8 through the condenser 9 located outside the rear side of the housing 1 and through the evaporator 5 to the suction connecting element of the compressor 8. The compressor 8 is located in the niche 10 located on the rear side of the housing 1 under the evaporator 5.

Not shown in the figure, a fan at one of the openings 7 drives air exchange between the inner space 3 and the chamber 6, and moisture from the air of the inner space 3 is deposited on the evaporator 5. If the refrigerator is a refrigerator, then depending on the set temperature of the inner space 3, the temperature the evaporator 5 is always positive or at least reaches positive values between the two working phases of the compressor 8. Thus, the moisture deposited on the evaporator 5 can continuously o drain or may mainly drain, at least during the idle phase of compressor 8, between two operating phases. Thus, a large amount of moisture is not collected on the evaporator 5.

If the refrigeration apparatus is a freezer, the temperature of the evaporator 5 and during the idle phase of the compressor 8 usually remains below 0 ° C, and thus, during the many successive phases of the idle and operation of the compressor 8, the evaporator 5 is gradually covered with ice. In this case, a heater is located on the evaporator 5 (not shown in the drawing), which allows the evaporator 5 to be heated to temperatures above 0 ° C and supply melt water to the drain during the idle phase of compressor 8.

Melt water, as in another case, is collected in a tray 11 on the bottom of the chamber 6, from the lowest point of which a pipeline 12. This pipeline 12 passes through the insulating layer of the housing 1 to the pallet 13, which forms a storage tank for melt water, and, through the spillway 14 of the tray 13, into the evaporation tray 15, which is mounted on the compressor 8 in close thermal contact with it.

Figure 2 shows in a stretched axonometric projection of the tray 13 and the evaporation tray 15.

The evaporation tray 15 is divided by partition walls 16, made in the form of partitions, into a plurality of containers 18-23, and the tank 18, limited by the lowest separation walls, is located at the highest point of the bottom of the evaporation tray 15. This point corresponds to the top of the compressor 8, incoming from below into the evaporation tray, and per unit of its area, the base is exposed to the strongest heat flux from the compressor among all tanks. The containers are connected to each other due to the flat cutouts 17 on the upper edges of the partition walls 16, and thus, whenever one container is full, the next container is filled through such a cutout 17.

The base area of the pallet 13 corresponds in the embodiment shown here to the total area of the bases of the containers 18, 19, 20, 21 of the evaporation tray 15. The tray 13 is supported by the evaporation tray 15 with the help of the integral support columns 24. The support columns 24 have cutouts 25 at their lower end provided in order to be fitted onto the partition walls 16 that surround the containers 18-21. The tip of the pipe fitting 26, rising from the bottom of the pan 13, forms a spillway 14. If the water level in the pan 13 exceeds the level of the spillway 14, then water flows downward through the pipe fitting 26. As can be seen from the figure, the pipe fitting 26 is slightly extended outward beyond the lower side of the tray 13, to ensure that irrigated water drips only from the lower end of the pipe fitting 26 directly into the uppermost tank 18 of the evaporation tray 15, and does not flow along the bottom side along the tray 13, to then drain into one of the containers below.

A second embodiment of a pallet 13 is shown in FIG. 3 in a perspective view. The spillway 14 is formed here not by the central pipe fitting, but by a groove 27 in the side wall of the pallet, with the groove 27 entering a vertical groove 28 on the outside of the pallet 13. Through the groove 27 and the groove 28, overflowing melt water enters the lower side of the pallet 13. This lower side shown in Fig. 4 in axonometric projection. Many grooves 29 extend from the groove groove 28 to the drain pin 30, which is spaced from the bottom in the central portion of the pallet 13, above the container 18. Water flowing from the pallet 13 is thus held on the underside of the pallet 13 in the grooves 29 due to capillary force . The grooves 29, which fill the entire bottom side of the drip tray 13, can accumulate significant water energy, and thus the melt water flowing from the drip tray 13 remains on the bottom side of the drip tray 13 for a long time before it reaches the trunnion 30 for draining and drips dropwise into capacity 18. So you can evaporate a significant amount of melt water even before it reaches the evaporation tray 15. Since the bottom side of the tray 13 is blown by the rising air heated on the evaporation tray 15, it is assumed that this bottom on the side of the relatively free water surface on which evaporation can occur, a higher proportion of evaporation is achieved than in the pan 13 itself.

From the edges on which the grooves 28 are made, the bottom of the pan 13 is slightly sloping towards the middle line 31. This is to ensure that the water in the grooves 29 drains to the draining axle 30 located on the middle line 31, in in the case when the receiving ability of the grooves 29 is exhausted, and also so that drops are not formed in any places on the underside of the pallet 13, which could fall into containers other than the container 18.

According to a modified embodiment, the pallet 13 is replaced by a storage plate 32, shown in FIG. 5 in a perspective view. The base area of the accumulation plate 32 in this case is the same as in the case of the tray 13, and it is also held on the evaporation tray 15 due to the support columns 24 mounted on the dividing walls 16. Melt water that drips from the pipe 12 onto the accumulation plate 32, is distributed in the system of grooves 29, made on the upper side of the storage plate 32 and through them reaches two grooves 28 on the edge of the storage plate 32, through which melt water, as in the case of a pallet in figure 3 and 4, goes to the lower side of the drive hydrochloric plate 32. It is also provided with a system of grooves 29 and the central spigot 30 for dripping as shown in Figure 4.

The most remarkable thing about the storage plate 32 is that it provides a large evaporation surface with a minimum overall height. Since the storage plate 32 does not have side walls like a pallet 13, it contrasts the horizontal airflow with a very small flow resistance. Therefore, it is particularly well suited for use in a refrigeration apparatus in which a fan, not shown, creates an air stream that glides over the free water surfaces of the evaporator.

In the above-described embodiments, an intermediate accumulator, that is, a tray 13 or a storage plate 32, is completely above the base of the evaporation tray 15. This contributes to the overall compact design of the evaporator. Depending on the volume available for the installation of the evaporator, it may, however, also be appropriate when the bases of the evaporation tray 15 and the intermediate storage 13 or 32 do not intersect completely, unless it is guaranteed that excess water flows from the intermediate storage into the evaporation tray 15.

If necessary, the evaporator of the present invention can be used and several intermediate drives, especially located in series. In this case, of course, it is also possible to combine intermediate drives of various or the above types with each other.

Claims (6)

1. An evaporator of melt water with a tray (15) for receiving melt water, moreover, above the tray (15), at a distance from it through the air gap, there is at least one intermediate drive (13, 32) for melt water that accumulates melt water with an open water surface, and the intermediate reservoir contains a second pan (13), as well as a plate (32, 13), equipped with a surface circuit (29), which accumulates melt water due to the capillary effect, characterized in that the plate is the bottom of the second pan ( 13), and the accumulating tal Water surface contour (29) is made on the bottom side of the bottom. 2. The evaporator according to claim 1, characterized in that the second pan (13) has a spillway (26) vertically spaced from the bottom of the second pan (13). 3. The evaporator according to claim 1, characterized in that the plate has at least one passage (26; 27, 28) for melt water, and the surface circuit contains at least one outlet from the passage (26; 27, 28) groove (29). 4. A refrigerator with a melt water evaporator, as stated in one of the previous paragraphs. 5. The refrigeration apparatus according to claim 4, characterized in that the melt water evaporator is located on the compressor. 6. The refrigerator according to claim 4 or 5, characterized in that it comprises a fan and that the melt water evaporator is located in the air flow path produced by the fan.

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