MXPA06010736A - Refrigerating plate for a refrigerator or freezer - Google Patents

Abstract

The invention relates to a vertical evaporating plate for refrigerating a refrigerator or freezer comprising a roll bond circuit which consists of refrigerant flow channels and comprises a descending and ascending sections, wherein at least a part of channels of the descending section comprises a liquid refrigerant accumulating area of a maximum height (hi), the totality of the heights (hi) is adjustable in such a way that the total volume of the accumulating areas is equal to or greater than half the volume of the liquid refrigerant and each height (hi) is less than 70%of the entire height of a channel (Hi). The inventive plate makes it possible to improve the thermal efficiency and reduce the sound level of a refrigerator or freezer.

Description

REFRIGERATION PANEL FOR REFRIGERATOR OR FREEZER FIELD OF THE INVENTION The invention relates to a refrigeration panel of the "lamination-plating" type for a refrigerator or freezer that allows improving the thermal efficiency of the refrigerant circuit and reducing the noise level during operation.

BACKGROUND OF THE INVENTION The refrigerant circuit of a refrigerator or freezer comprises a compressor intended to propel the coolant, for example a fluorinated or chlorofluorinated hydrocarbon, or an alkane, and an evapulator, usually in the form of a vertical panel, completed , in the case of refrigerators with freezer compartment, with a panel that has horizontal planes, for example in the plane that separates the two compartments. One of the modes of manufacture of the evaporator panel is to make the circuit of the refrigerant by means of the technique called "lamination plating", that is to say from two sheets of aluminum or aluminum alloy, of which one is coated, in the areas destined to form the circuit, with an ink intended to prevent welding between both plates. After, both Ref. 175499 sheets are welded by gluing. The non-welded zones are inflated hydraulically or pneumatically to form the circuit, which can be of the double-sided type with two deformed faces, or of the single-shell or OSF type (a flat side) with a flat face and a deformed face. In general, the circuit comprises a succession of channels with a downward part towards the bottom of the panel and an ascending part towards the top of the panel, with, possibly, at the end of the circuit, an enlarged area serving as a boiler, in which has just been evaporated regardless of the external conditions. When the compressor stops, the refrigerant fluid migrates from the condenser to the evaporator because the high pressure in the condenser pushes it towards the low pressure zone constituted by the evaporator, the absence of solenoid valve does not allow to isolate the zone of high pressure from the zone of low pressure. The migration of the refrigerant fluid is done by liquid / gas and by gravity, the liquid part goes down to the lowest point of the circuit where it accumulates. Starting the compressor, particularly in the absence of a solenoid valve between the compressor and the evaporator, pushes the gas into a large mass of liquid, thus causing audible gurgling. On the other hand, manufacturers of household appliances always try to reduce their electricity consumption to assess this advantage before consumers or comply with the regulatory framework. The object of the present invention is to provide a vertical evaporation panel of the laminated type for a refrigerator or freezer that allows reducing the energy consumption and reducing the sound level of the evaporator.

OBJECT OF THE INVENTION The invention has as an object a vertical evaporative panel for the refrigeration of a refrigerator or a freezer, comprising a circuit of laminated type constituted by channels, for the circulation of the refrigerant fluid, with a descending part and a ascending part, in which at least a part of the channels of the descending part comprises a zone of accumulation in liquid state of the cooling fluid, which has a maximum height h, the set of the heights h is adjusted so that the volume total of the accumulation zones is greater than or equal to half the total volume of coolant, and that each of the heights h is less than 70% of the total height of the Hi channel.

DESCRIPTION OF THE FIGURES The figure represents, in vertical section, an element of a channel of a panel according to the invention comprising a siphon that defines the accumulation zone of the coolant. Figure Ib represents another embodiment of the accumulation zone of a channel according to the invention comprising appendages. The figure represents a channel element that combines the two embodiments of the figures la and Ib. Figure Id represents a channel according to the invention of the kettle type. Figure 2 represents an example of a complete panel according to the invention.

DESCRIPTION OF THE INVENTION Essentially, the invention consists in providing, in the descending part of the evaporator circuit, channels that comprise accumulation zones for the refrigerant fluid in liquid state, in order to avoid that this liquid will completely fill the channels from the bottom of the circuit. These accumulation zones, present only in one part or in all the channels, allow a relatively homogeneous distribution of the liquid in the panel when the compressor stops, as long as the total volume of the accumulation zones is greater than or equal to half. of the total volume of the liquid, so that the sound level is minimized when the compressor is restarted. However, it must be avoided that the accumulation of liquid prevents or reduces too much the passage of gases coming from the evaporation of the liquid, which would damage the thermal efficiency of the device. To this end, the height h of the liquid in the accumulation zone must be sufficient, but neither must it exceed 70% of the total height Hi of the channel. For the accumulation zone, several embodiments are possible. The one represented in the figure consists of making a siphon, the channel is folded up to enclose a certain volume of liquid, leaving a sufficient passage for the gas. The embodiment shown in FIG. Ib consists in providing the channel with vertical appendices oriented downwards for the accumulation of liquid, which have the advantage of not reducing the passage section of the gas in the channels. When the compressor is running, these appendices allow the evaporation of the liquid directly in distant areas of the channels, which contributes to cooling these areas and improving the thermal efficiency of the circuit. The example represented in the figure combines the two previous embodiments. The example shown in Figure Id shows the use of kettle-type channels, ie wide channels with welded parts in the form of pellets. The use of these pads allows to increase the width of the channels while reducing their deformation under the action of internal pressures, for example the pressure of the refrigerant under certain operating conditions or during the tests to detect eventual leaks in the evaporators before assembling. the refrigerator or the freezer. The pellets do not have to reduce too much the passage surface of the gas that evaporates in the accumulation zone, which would cause, in spite of the presence of accumulation zones according to the invention, an increase in the sound level. Thus, the sum of the widths or the pads of a kettle zone does not have to exceed 90% of the total length L of this kettle zone. Figure 2 represents an example of a complete panel in which the majority of the ends of the horizontal channels of the descending part of the circuit has a siphon shape, with the lower channel comprising appendages. The cooling panels according to the invention allow to reduce the electrical consumption and the sound level of the refrigerator or freezer. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention. below, what constitutes zones of accumulation. Panel according to one of claims 1 to 3, characterized in that it comprises a boiler-type channel comprising central areas welded in the form of tablets. Panel according to claim 4, characterized in that the sum of the widths li of the pellets is less than 90% of the length L of the kettle.

Claims (3)

CLAIMS Having described the invention as above, the contents of the following claims are claimed as property:

1. Vertical laminated lamination type evaporative panel for refrigerating a refrigerator or freezer, characterized in that it comprises a circuit constituted by channels, for the circulation of the cooling fluid, with a descending part and an ascending part, in which at least a part of the channels of the descending part comprises an accumulation zone in the liquid state of the cooling fluid, which has a maximum height hi, the set of the heights hi is adjusted so that the total volume of the accumulation zones is greater or equal to half the total volume of coolant, and that each of the heights h is less than 70% of the total height of the Hi channel. Panel according to claim 1, characterized in that an end of one or more channels is folded upwards, in order to form a siphon and to constitute an accumulation zone. Panel according to one of claims 1 or 2, characterized in that at least one of the channels has vertical appendages oriented towards