ES2807543T3 - Refrigeration and / or freezing device - Google Patents

Abstract

Refrigeration and / or freezing device with: a refrigerant circuit comprising a condenser (10), a container for de-icing water (20) comprising a first tray (50) for receiving de-icing water and a second tray (60) for the reception of de-icing water, as well as, a fan (30) for the generation of an air flow through the condenser (10) and / or through the first tray (50) and the second tray (60 ); wherein the first tray (50) and the second tray (60) are arranged relative to the condenser (10) in such a way that heat is transferred from the condenser (10) to the meltwater; The fan (30) is designed and arranged in such a way that it evacuates the air loaded with de-icing water from the first tray (50) and from the second tray (60) on the rear side (200) of the device, and the device is designed as a floor device and the condenser (10), the fan (30) and the first tray (50) and the second tray (60) are arranged at the base of the device; wherein the air flow generated by the fan (30) circulates on a rear side (200) of the cooling and / or freezing device to avoid a condensation of de-icing water at the points of the rear side (200) that tend to condense; characterized in that the first tray (50) and the second tray (60) are connected to each other by grooved plates (70) in such a way that the melt water reaches the second tray (60) from the first tray (50) in form of a film (75) on both sides of the plates (70).

Description

DESCRIPTION

Refrigeration and / or freezing device

The present invention refers to a cooling and / or freezing device with at least one refrigerant circuit comprising at least one condenser and with at least one de-icing water container for receiving de-icing water.

From the state of the art, cooling and / or freezing devices are known which have a so-called base unit, in which the condenser of the refrigerant circuit, as well as a fan, are arranged. Other components of the base unit are the compressor of the refrigerant circuit, as well as a container for receiving the de-icing water that appears when the evaporator is defrosted. Applications US 2679 144 A, JPH11 294933 A, GB 1460450 A, DE 29820730 U1, EP 2431687 A2, JP H1019449 A, US 4156352 A and CN 1105748 A disclose cooling and / or freezing devices with a container for de-icing water. For them, it is known to place de-icing trays in the compressor. This offers the advantage that the heat from the compressor drives the evaporation of the melt water. A disadvantage is that the volume of the compressor cavity must be increased accordingly and the useful content correspondingly reduced. Another disadvantage is the relatively small water surface, which is available for evaporation.

It is also known from the state of the art to arrange the de-icing water tray under the condenser; where the condenser is submerged in the meltwater. Here there is also the disadvantage that a relatively small water surface is available. Another disadvantage is that the condenser tube must be protected against corrosion due to its contact with water.

It is also known from the state of the art to place the de-icing water tray under the condenser and that the condenser is not submerged in the de-icing water. In this case there is also the disadvantage of a relatively small water surface.

Furthermore, it is known from the state of the art to avoid condensation of water on the rear wall of the device by means of strong insulation and / or heating, which represents a comparatively complex solution to avoid condensation.

The object of the present invention is to improve a cooling and / or freezing device of the kind mentioned in the introduction, in the sense that efficient evaporation of the de-icing water is allowed.

Said object is solved, according to the present invention, by the characteristics of claim 1. The fan of the device is designed in such a way that, during operation, it generates a movement of air over the container for de-icing water and evacuates the Moisture-laden air through one or multiple openings in the rear wall of the device or is diverted through one or more channels in the area of the rear wall of the device to the outside of the device.

In an alternative or additional configuration of the invention it is provided that the condenser is designed flat and extends, for example, above and / or below the container for de-icing water. In this way, a particularly optimal heat transfer is obtained from the condenser to the water in the meltwater container. In this way, the condenser can consist, for example, of one or more serpentine or bent tubes and extend in one plane or in multiple planes, which are preferably arranged parallel to the surface of the water in the container to melt water. In this way, a particularly efficient evaporation of the de-icing water is achieved, since the heat-emitting surface is large with respect to the surface of the water in the de-icing water container.

The present invention also refers to a refrigeration and / or freezing device with at least one device for evaporating de-icing water; wherein the device for the evaporation of the melt water has multiple containers which are arranged relative to each other in such a way that the melt water flows in cascade from one container to the next container or because the device for the evaporation of the melt water It has a plurality of flat, plate-shaped elements, which are arranged in such a way that the meltwater overflows them in order to evaporate.

According to a form that is not claimed, it is conceivable, for example, that the device for evaporation of the meltwater consists of a plurality of containers, in particular bowls, through which the water flows from one to another successively like a waterfall. Thus, it is conceivable, for example, to design the bowls with an overflow, of so that at a certain fill level in one of the bowls an overflow is automatically produced into the next bowl. The bowls can be arranged directly one below the other or diagonally, that is, one below the other offset from one another.

According to the invention, the meltwater flows over multiple ribbed plates. Thanks to the relatively large surface area of the plates, optimum evaporation performance is achieved. In this case it is preferably conceivable that said plates are heated by the condenser.

Furthermore, it can be provided that the device has at least one refrigerant circuit, which comprises at least one condenser and that the device for evaporating the de-icing water is partially or completely above the condenser. Another arrangement relating to the condenser is also conceivable and is encompassed by the invention, such as, for example, the arrangement below the condenser or also next to the condenser or in the direction of the air flow upstream and / or downstream of the condenser.

The container for de-icing water or the device for evaporation of de-icing water can basically be located inside, above, below or upstream and / or downstream of the condenser.

It is particularly advantageous when preferably at least one surface reflecting heat or thermal radiation is provided on the de-icing water container which is arranged in such a way relative to the condenser and relative to the de-icing water container or relative to the device for evaporating de-icing water, that exhaust heat, in particular thermal radiation from the condenser (10) is conducted through said surface to the area of the container for de-icing water or to the area of the device for evaporation of melt water. Thus it is conceivable, for example, to apply at least one heat radiation reflecting surface, such as, for example, an aluminum foil. Therefore, through such a means it is possible, in particular, to conduct the thermal radiation from the condenser to the de-icing water and thus, eventually, to further cool the lower part of the device. The reflective surface of thermal radiation can be located on the condenser, for example, in the cover of the base of the device.

In another embodiment of the invention it is provided that the evaporation tray or the container for the de-icing water has one or more elements for the air guide, which are designed in such a way as to provide for an improvement in evaporation and / or a heat dissipation in the condenser.

The melt water container can be designed as an injection molded part or as a plastic part. The container for de-icing water can have air guide elements that ensure better evaporation and / or heat dissipation in the condenser. Alternatively or additionally, the container for de-icing water can have one or more elements that can receive the condenser and / or other elements of the base unit or of the device. Therefore, such elements can be used for stabilization, sound insulation, etc.

In a further embodiment of the invention, provision is made for the de-icing water container to have thermal energy storage material or for such a material to be arranged in the de-icing water container. Therefore, it is conceivable, for example, that the evaporation tray or the meltwater container has thermal energy storage material in the form of a latent thermal energy storage material or in another form, i.e. a material non-latent thermal energy storage. The evaporation tray or the container for de-icing water can have, for example, one or more chambers with such a thermal energy storage material.

It is also conceivable that the material of the meltwater container has a high heat capacity (latent or non-latent). Thus, the container for de-icing water can contain this type of material or be at least partially composed of it.

In a further embodiment of the invention, provision is made for the de-icing water container to be made of plastic or sheet metal and / or of an acoustic absorbent material.

In another embodiment of the invention, at least one de-icing water pipe is provided, which is arranged in such a way that it conducts de-icing water, preferably, from the cooled interior of the device or from the evaporator to the container for de-icing water. de-icing or towards the device for evaporation of de-icing water; where the de-icing water pipe has openings in its wall, through which de-icing water can pass. It is therefore conceivable, for example, that the hose for the evacuation of the melt water is a so-called sweat hose, which is intentionally porous and therefore allows a certain amount of pre-evaporation of the melt water. .

It is also conceivable that pre-evaporation vessels are provided, such as, for example, pre-evaporation trays, in which the melt water enters first. From there, the meltwater flows to other vessels or directly to the main evaporation tray. This type of pre-evaporation vessels can be arranged, for example, in the cavity cover or in the cavity cover of the compressor, below the compressor, in the air guide elements at the base or the like.

It is also conceivable that the transport of the melt water to the melt water container takes place through one or more plastic hoses and / or through one or more injection molded channels, in which the melt water already evaporates. before reaching the melt water container.

Alternatively or additionally to the previously mentioned characteristics, the device can be designed in such a way that at least one means is provided, which is arranged and designed so that by this means the temperature at the rear of the device is kept above the point condensation. It is also conceivable that there are air guide elements for the air to overflow the rear side and / or to generate a swirl of air flowing along the rear side. These means prevent de-icing condensation of the air from occurring, which preferably discharges upward from the base of the device at the rear of the device.

In this way, preferably, the rear wall of the device is partially or completely made with a surface with a high emission level or with a higher emission level than conventional devices. This means that this medium or the surface absorbs heat from the environment and thus keeps the surface temperature or the temperature in the areas adjacent to the surface above the dew point.

According to the invention, the condenser is arranged at the base of the device. It is also possible to place one or more air ducts on the rear wall of the device, in such a way that the air is guided by them over critical points where there is a risk of condensation. Alternatively or additionally to this, provision may be made for the rear wall of the device to be provided with one or more guide elements that are responsible for generating a directed eddy of air at critical points, that is, at those points in which, otherwise way, a condensation would be likely.

The side walls of the device are preferably designed so that the least amount of ambient air reaches the rear wall, but mainly the hot air from the base passes through the rear wall.

According to the invention, the device is a floor device. Preferably it is provided that the base has one or more openings on its front side, through which air enters the base or is sucked in by the fan.

In the base space of the device, which is below the refrigerated utility space of the device, the container for de-icing water, the condenser, the compressor and the fan are arranged. It is preferably provided that the condenser and the container for de-icing water are arranged first in the direction of the air flow, then the fan and, if necessary, the compressor, so that the fan draws the air through the container for water de-icer and condenser and then discharge it in the area of the rear wall of the device, preferably after the air has circulated around the compressor.

The aforementioned means for avoiding condensation need not necessarily be provided on the device itself. The invention also encompasses the case that a furniture wall or a building wall, arranged adjacent to that of the device, is designed with one or more of these means. This refers not only to the means for increasing the temperature, but also to the other mentioned means, which prevent condensation in the area of the rear of the device, of the furniture wall or of the building wall or of a space. intermediate.

In accordance with the foregoing, the present invention further comprises a system comprising at least one cooling and / or freezing device according to one of claims 1 to 6 as well as at least one wall, in particular, at least one wall furniture or construction, to which the device is oriented adjacent to its rear side; wherein on said wall and / or on the rear wall of the device or in the space located between them there are means that are arranged and designed in such a way that, by means of said means, the temperature at the rear of the device (200) and / or in the mentioned wall and / or in the interspace it is kept above the dew point.

At the rear of the device, on the side of said wall facing the device and / or in the middle, there can be found air guide means and / or air guide elements to generate an air swirl.

Other details and advantages of the invention are explained in detail according to an exemplary embodiment represented in the drawing. Figures show:

Figure 1: a schematic side view of the base of the device in section.

Figure 2: an enlarged side view of the rear area of the base of the device in section.

Figure 3: schematic views of devices to promote the evaporation of meltwater.

Figure 4: a perspective view of the fan, the container for de-icing water and the condenser. Figure 5: a perspective view of the rear base area of the device.

In Figure 1, the reference numeral 10 represents a condenser, consisting of two levels of coiled or bent tubes, between which the melt water tray 20 is arranged.

The condenser 10 is a component of a refrigerant circuit, which in addition to the condenser comprises at least one evaporator, a compressor and at least one capillary tube through which the refrigerant passes to the evaporator. The reference number 30 indicates a fan that blows the air according to figure 1 from left to right through the condenser 10 and also through the de-icing water tray 20. This means that the condenser 10 as well as the water tray de-icing devices 20 are arranged upstream, that is, on the suction side of the fan 30.

As can be seen in Figure 2, at the rear of the device there are one or more openings 32 or ducts, through which the air can exit the base of the device according to the direction of the upward arrow on the side. later. This air is heated, on the one hand, by the condenser 10 and, on the other hand, by the compressor; where it is possible that the compressor is located downstream of the fan 30 in the direction of the air flow. Reference number 100 indicates the top wall and reference number 200 the rear wall of the compressor cavity 300. Reference number 400 represents the cooled interior of the device.

As can be seen in Figure 1, below the cooled interior 400 there is an area 1000 through which air can circulate from front to back, that is, according to Figure 1, from left to right, in which the condenser is located. 10 and the evaporation tray 20. In the section between said zone 1000 and the compressor cavity 300, the fan 30 is located.

Due to the flow of hot air generated in this way, which flows over the back of the device, it is conceivable to avoid condensation of de-icing water at the points on the back of the device that tend to condense and evacuate the moisture-laden air.

Figure 2 shows the rear area of the device in an enlarged sectional representation. Reference symbol K indicates a refrigerant valve and reference symbol W denotes a water valve. The reference symbol L in Figure 2 indicates a flow of hot air that is led along the rear wall of the device at points that tend to condense. Thus, there is the possibility of evaporating the condensate, which is generated by the air flow, on the rear wall.

FIG. 3 shows in top view the embodiment according to the invention, namely a first tray 50 for receiving de-icing water and with reference symbol 60 a second tray for receiving de-icing water. The two trays 50, 60 are connected to each other by grooved plates 70, which can be composed, for example, of metal in such a way that the water arrives in the form of a film 75 on both sides of the plates 70 in the direction of the arrow from tray 50 arranged above through the surface of plates 70 to bottom tray 60. Optimal evaporation of water is achieved due to the relatively large surface area of plate-shaped elements 70.

The lower representation of FIG. 3 shows a plurality of de-icing water containers 78 arranged one above the other, through which de-icing water flows cascadingly. For this, each of the evaporation trays 78, with the exception of the last one, has an overflow 79 through which the water is poured into the next container when it reaches the corresponding fill level. In this way, a relatively large area of melt water is provided, which results in a correspondingly optimal evaporation of the melt water.

Indicated by reference numeral 80 in Figure 1 is a hose or conduit for supplying de-icing water from the cooled interior or from the evaporator of the device to the de-icing water tray. As stated above, such a hose can be designed, for example, as the so-called sweat hose. Alternatively or additionally it may be provided that, for example, in In the cavity cover or elsewhere, injection molded conduits and / or filters and / or sieves are provided which are designed in such a way that the water already partially evaporates in the conduits.

The material of the melt water container can be, for example, sound absorbing. The mime can be made of plastic or metal, preferably sheet metal. It can have chambers which can be filled, for example, with water or similar thermal energy accumulators. It is also conceivable that the plastic container itself or the container for de-icing water is present or composed of a thermal energy storage material (latent or non-latent) or of a material with a high heat capacity.

Furthermore, it is conceivable that elements for air distribution and / or for generating turbulence are provided, which have the function of guiding the air over the condenser and / or above the container for de-icing water in such a way that, on the one hand , there is better heat dissipation from the condenser. and on the other hand, offer better heat transfer from condenser to melt water.

To avoid condensation in the area of the rear wall of the device, it is conceivable to make the surface of the device or an adjacent wall of a material with a high level of emissivity to absorb heat from the environment. This heat can be discharged into the air so that it always has a temperature above its dew point. It is also conceivable to provide air ducts which are arranged in such a way that hot air from the base of the device is directed in a directed manner over areas at the rear of the device which tend to condensation. It is also possible to use spacers or air flow elements for the controlled generation of turbulence. It is also possible in this way to avoid the formation of condensation liquid in the area of the rear of the device or to reduce the probability of condensation liquid being produced.

Figure 4 shows in a perspective view a partial area of the evaporation tray 20 as well as the condenser 10 located on it, which consists of a bent tube. As can be seen in Figure 4, the condenser is essentially in a plane and preferably parallel to the surface of the evaporation tray 20, which has multiple chambers. Figure 5 shows the lower rear area of the device in a perspective view. The reference numeral 20 indicates the container for de-icing water, on which the condenser 10 is arranged. The container for de-icing water 20 as well as the condenser 10 are overflowed with air by means of the fan 30. This air absorbs the moisture . The fan 30 directs the humidity through the compressor 40 and evacuates it through one or more openings 32 in the area of the rear side 200 or through one or more channels in the area of the rear side of the device.

Claims (7)

1. Refrigeration and / or freezing device with: a refrigerant circuit comprising a condenser (10), a container for de-icing water (20) comprising a first tray (50) for receiving de-icing water and a second tray (60) for receiving de-icing water , as well as, a fan (30) for generating an air flow through the condenser (10) and / or through the first tray (50) and the second tray (60); wherein the first tray (50) and the second tray (60) are arranged relative to the condenser (10) in such a way that heat is transferred from the condenser (10) to the meltwater; The fan (30) is designed and arranged in such a way that it evacuates the air loaded with de-icing water from the first tray (50) and from the second tray (60) on the rear side (200) of the device, and the device is designed as a floor device and the condenser (10), the fan (30) and the first tray (50) and the second tray (60) are arranged at the base of the device; wherein the air flow generated by the fan (30) circulates on a rear side (200) of the cooling and / or freezing device to avoid a condensation of de-icing water at the points of the rear side (200) that tend to condense; characterized because, The first tray (50) and the second tray (60) are connected to each other by grooved plates (70) in such a way that the meltwater reaches the second tray (60) from the first tray (50) in the form of a film (75) on both sides of the plates (70). Refrigeration and / or freezing device according to one of the preceding claims, characterized in that at least one heat-reflecting surface is provided, which is arranged in such a way with respect to the condenser (10) and with respect to the first and the first. second tray (50, 60) that exhaust heat, in particular, thermal radiation from the condenser (10) is conducted through the reflective surface to the area of the first and second tray (50, 60). Refrigeration and / or freezing device according to one of the preceding claims, characterized in that the first tray (50) and the second tray (60) have air guide elements and / or elements that are suitable for receiving the condenser ( 10) and / or other elements of the device, in particular the base of the device and / or has one or more areas in which the thermal energy storage material is arranged. Cooling and / or freezing device according to one of the preceding claims, characterized in that at least one de-icing water pipe is provided, which is arranged in such a way that it conducts de-icing water towards the first tray (50); where the de-icing water pipe has openings in its wall, through which de-icing water can pass, and / or because at least one de-icing water pipe is present which is designed in such a way that the de-icing water de-icing is already evaporating in the de-icing water pipe. Refrigeration and / or freezing device according to one of the preceding claims, characterized in that a plurality of first trays (50) and second trays (60) are provided, through which the trays de-icing water circulates in parallel or in succession. Refrigeration and / or freezing device according to one of the preceding claims, characterized in that at least one medium is provided, which is arranged and designed in such a way that by this means the temperature at the rear of the device (200) is maintained above the dew point and / or because there are one or more air guide elements for air to overflow the rear side of the device (200) and / or to generate a swirl of air flowing along the side rear of the device (200). System comprising at least one cooling and / or freezing device according to one of claims 1 to 6 as well as at least one wall, in particular at least one furniture or building wall, to which the device is oriented adjacent to its rear side (200); wherein at said wall and / or on the rear wall of the device or in the space located between them there are means that are arranged and designed in such a way that, by these means, the temperature at the rear of the device (200) and / or in the mentioned wall and / or in the intermediate space is maintained above the point of condensation, and / or means are present in the form of one or more air guide elements for the air to circulate in the area between the rear side of the device (200) and said wall and / or to generate an air eddy that circulates longitudinally between the rear side of the device (200) and said wall.