DE202018101608U1 - Evaporator for a refrigeration system - Google Patents

Abstract

Evaporator for a refrigeration system, comprising at least one fluid circuit (12) arranged between two outer plates (11) and characterized in particular by comprising:
at least one inlet path (2), at least one first outlet path (31) and at least one second outlet path (32);
at least one branching means (4) defined between the two outer plates (11); wherein the branching means (4) comprises at least one inlet path (41), a first outlet path (42) and a second outlet path (43);
at least one storage chamber (5) defined between the two outer plates (11);
wherein the inlet path (41) of the branching means (4) is located downstream of the fluid circuit (12);
wherein the first outlet path (42) of the branching means (4) is fluidly connected to the first outlet path (31) of the evaporator (1);
wherein the second outlet path (43) of the branching means (4) is fluidly connected to the storage chamber (5); and
wherein the second outlet path (32) of the evaporator (1) is fluidly connected to the storage chamber (5).

Description

Domain of utility model

The present utility model relates to an evaporator for a refrigeration system and in particular to a plate evaporator for a refrigeration system with more than one evaporator.

Basics of the utility model

As known to those skilled in the art, in the current state of the art, there are plate evaporators formed by two superimposed and curved metal plates with an embedded tube through which the refrigerant circulates. Eventually, the first model of a plate evaporator in the patent document became US2966781 , filed March 5, 1956, which is hereby incorporated by reference in its entirety. The plate evaporators are also known as evaporators of the roll-bond type.

It is also well known to those skilled in the art that the current state of the art includes refrigeration systems based on the fractional evaporation concept. Examples of refrigeration systems based on this concept may be exhaustive in the patent documents US5220806 . EP2325577 and PI1 1043512, which are also fully incorporated herein by reference.

In broad terms, a refrigeration system based on the concept of fractionated evaporation, among other features and insignificant details, includes a suction / vaporization branch, according to which a "first component" of refrigerant returns to the compressor after a first evaporation (in a first evaporator) and a "second component" of the refrigerant flows to a second evaporator (in a second evaporator) to continue to travel back to the compressor.

This concept, which is widely known and used, is interesting because it provides for the return of the "first component" of the refrigerant after the immediate exhaustion of its thermal function in the first vaporization to the compressor and because it is merely the "second component" of the refrigerant which still contains a cooling power that supplies second evaporation. It is common, but not necessary, for the second component of the refrigerant to undergo a second expansion before being used in the second evaporation.

It should therefore be noted that the "first component" of the refrigerant and the "second component" of the refrigerant with different pressures and temperatures to the compressor run back when a second relaxation takes place. As described above, the separation can be carried out without a second relaxation, under which condition the pressure and the return temperature will be the same.

To deal with this scenario - the presence of two refrigerant return lines with different pressures and temperatures - describes the patent document US5220806 a refrigeration system composed of two interconnected reciprocating compressors, each of which can receive one of the refrigerant return lines at different pressures and temperatures. The patent document EP2325577 discloses a refrigeration system consisting of a coil compressor provided with two inlet chambers, each of which can receive one of the refrigerant return lines at different pressures and temperatures. The patent document PI11043512 describes a refrigeration system consisting of a dual suction compressor which, as in the patent document WO 2011/134030 is designed to accommodate those refrigerant return lines having different pressures and temperatures to select according to a particular convenience. As indicated in [0006], there is no requirement for a double return with different pressures.

Regardless of the technical solution used with respect to the compressors or compressor systems, it is found that the clear majority of refrigeration systems (with dual evaporation) based on the concept of fractional evaporation depends on the use of a phase separator located at the intersection point between the end of the first evaporation and the beginning of the second evaporation is arranged. Such a phase separation device comprising another modular component is capable of usually separating, by gravity and capillary action, the gas phase from the liquid phase of the refrigerant (which constitutes the "second component" of the refrigerant).

It is the phase separation device that ensures that the "first component" of the refrigerant (which is about to return to the compressor) is mainly composed of refrigerant in the gas phase, and ensures that the "second component" of the refrigerant is mainly due to refrigerant in the liquid Phase is composed.

However, the known prior art phase separation devices as described above include additional and modular components. It should be mentioned that this must be integrated into the specific refrigeration systems of the manufacturing stage (usually manually) and prone to leakage.

In this sense, it is observed that the present technical scenario lacks more appropriate solutions, and it is on the basis of that condition that the utility model in question originated.

Tasks of the utility model

Thus, the basic object of the utility model in question is to provide a plate evaporator for a refrigeration system which integrates a phase separator in a combined manner.

Thus, one of the objects of the utility model in question is to provide a plate evaporator comprising an inlet for a previously expanded refrigerant, a first outlet for a refrigerant in the gas phase, and a second outlet for a refrigerant in the liquid phase. Accordingly, one of the objects of the utility model in question is to provide a plate evaporator which is particularly optimized for use in refrigeration systems with more than one evaporator.

Summary of the utility model

The above summarized objects are completely solved by means of the evaporator for a refrigeration system comprising at least one refrigerant circuit defined between two outer plates, at least one inlet path, at least one first outlet path and at least one second outlet path.

According to the utility model in question, the evaporator further comprises at least one branching means defined between the two outer plates and at least one storage chamber defined between the two outer plates.

The branching means comprises at least one inlet path, a first outlet path, and a second outlet path, wherein such inlet path is located downstream of the fluid circuit, the first outlet path is connected to the first outlet path of the evaporator, and such second outlet path is fluidly connected to the storage chamber.

Further, the second outlet path of the evaporator is fluidly connected to the storage chamber, and the storage chamber is disposed at a position having a higher gravitational potential than that of the branching medium.

list of figures

• 1 den Verdampfer gemäß dem fraglichen Gebrauchsmuster auf schematische Weise; und
• 2 ein beispielhaftes Kältesystem, das in den Verdampfer integriert ist, gemäß dem fraglichen Gebrauchsmuster auf schematische Weise.

In particular, the utility model in question will be described in detail with reference to the illustrative figures listed below; show it

• 1 the evaporator according to the utility model in question in a schematic manner; and
• 2 an exemplary refrigeration system, which is integrated into the evaporator, according to the utility model in question in a schematic manner.

Detailed description of the utility model

In accordance with the central objects of the utility model in question, there is provided an evaporator specifically designed for dual-evaporation refrigeration systems, and particularly used in refrigerators (which preferably consists of two chambers operating in, but not limited to, different temperature ranges).

The general idea of the utility model in question is to take advantage of the "structure" of a plate vaporizer (Roll Bönd vaporizer which is well known to those skilled in the art and is distinguished for its versatility of use in refrigerators; further defining the structural walls of the cooling chamber and the freezing chamber) to add, in a workable, safe and resistant manner, an arrangement analogous to the internal arrangement of such a phase separation device as disclosed in U.S. Pat Refrigeration systems on the basis of the concept of fractional evaporation is so widespread and necessary.

That is, in addition to fulfilling the basic functions of a plate evaporator (structural function and heat exchange function), the proposed evaporator also fulfills all the functions and results of a phase separator. It should therefore be noted that the proposed evaporator is an object of use and practical use in the refrigeration industry, which may promote functional improvements in its use and in the manufacture of refrigeration systems.

It should be mentioned above all that the disclosed evaporator 1 as with most plate evaporators since the publication of the patent document US2966781 a fluid circuit 12 that covers between two outer plates 11 is defined. Additional technical details of this construction (among others the nature of the material, the thickness of the plates, the design of the circuit, the manufacturing process) may be different, moreover they are well known to those skilled in the art and not directly related to the construction and the inventive Effects that are achieved here.

In addition, the evaporator points 1 an inlet path 2 , a first exhaust path 31 and a second exhaust path 32 on.

In the exemplary refrigeration system based on the concept of fractionated evaporation and by the evaporator 1 is integrated, it can be seen, as suggested in Fig. 2, that the inlet path 2 the evaporator 1 is connected to the first expansion device (eg, a capillary) EXP1, the first outlet path 31 of the evaporator 1 via the first intake passage SL1 is connected to one of the suction paths of the compressor COMP, which can operate with two intake passages, and the second exhaust passage 32 of the evaporator 1 connected to the second expansion device (capillary) EXP2.

As can be expected, the exemplary refrigeration system based on the concept of fractionated evaporation and through the evaporator 1 is integrated, as in 2 is proposed, also a conventional capacitor COND and a conventional evaporator EVAP. In addition, the compressor COMP also has a second intake passage SL2 and an exhaust passage DL.

It should be noted that the refrigeration system itself is thus very similar to one of the possibilities of a refrigeration system described in the patent document PI11043512, the big difference being that the "first evaporator" and the "phase separator" are no longer separate, but are one-piece.

For this purpose, the evaporator 1 a branching agent 4 and a storage chamber 5 on, both between the two outer plates 11 are defined, which is also on the fluid circuit 12 true.

Because the branching agent 4 basically comprises a tube, the z. B. may have the shape of a "T" or a "Y" (not limited to this type of arrangement), between the two outer plates 11 is defined, and the storage chamber 5 basically a defined gap or defined volume between the two outer plates 11 includes, it is repeated that the other technical characteristics that the outer plates 11 themselves immanent, or the dimensional characteristics of the branching agent 4 and the storage chamber 5 can vary according to specific designs, and that this variability in no way spares the basic and necessary properties, if it is due to the day-to-day knowledge of the skilled artisan in designing the vaporizer 1 is worn according to the present utility model.

However, it is important to mention that the branching agent 4 as a rule at a position with a higher gravitational potential than that of the storage chamber 5 is arranged, finally, the separation of the gas phase and the liquid phase of the refrigerant is done by gravity. That means it's the synergistic interaction between the branching agent 4 and the storage chamber 5 is that promotes the necessary phase separation effects of the refrigerant.

Considering that the branching agent 4 an intake passage 41, a first exhaust passage 42 and a second exhaust path 43 includes the following:

The inlet route 41 is downstream of the fluid circuit 12 arranged such that the branching means 4 the two-phase refrigerant receives after evaporation in the fluid circuit 12 is produced.

The first outlet path 42 of the branching agent 4 is with the first exhaust path 31 of the evaporator 1 fluidly connected, such that only the refrigerant in the gas phase to the first Auslaßweg 31 of the evaporator 1 is directed.

The second outlet way 43 of the branching agent 4 is with the storage chamber 5 fluidly connected, such that by gravity, only the refrigerant in the liquid phase in the storage chamber 5 is directed.

The storage chamber 5 is with the second outlet path 32 of the evaporator 1 fluidly connected, such that only the refrigerant in the liquid phase to the second outlet 32 of the evaporator 1 is directed.

Thus, in a general understanding, the utility model in question shows that the proper definition of the spaces between the plates, in addition to forming an effective evaporator with a structural function, can also be compliant with an evaporator conjugated to a phase separator, both of which provide structural functions and interconnected without the need for additional connections and / or components and / or processes.

It is important to note that the above description has the exclusive purpose of describing the particular embodiment of the utility model in question in an exemplary manner. Therefore, it is apparent that modifications, variations, and structural combinations of the elements that perform the same function in substantially the same manner to achieve the same results remain within the scope of the claims as defined by the appended claims.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 2966781 [0002, 0022]
• US 5220806 [0003, 0007]
• EP 2325577 [0003, 0007]
• WO 2011/134030 [0007]

Claims (1)

An evaporator for a refrigeration system, comprising at least one fluid circuit (12) disposed between two outer plates (11), and characterized in that it comprises at least one inlet path (2), at least one first outlet path (31 ) and at least one second exhaust path (32); at least one branching means (4) defined between the two outer plates (11); wherein the branching means (4) comprises at least one inlet path (41), a first outlet path (42) and a second outlet path (43); at least one storage chamber (5) defined between the two outer plates (11); wherein the inlet path (41) of the branching means (4) is located downstream of the fluid circuit (12); wherein the first outlet path (42) of the branching means (4) is fluidly connected to the first outlet path (31) of the evaporator (1); wherein the second outlet path (43) of the branching means (4) is fluidly connected to the storage chamber (5); and wherein the second outlet path (32) of the evaporator (1) is fluidly connected to the storage chamber (5).

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