KR20170074735A - Apparatus for separating and storing liquid refrigerant of a refrigerant circuit - Google Patents

Abstract

The present invention relates to an apparatus (6) for separating and storing liquid refrigerant in a refrigerant circulation system (1). The device (6) has a housing (10) formed of a collection container for a refrigerant, wherein the housing has a refrigerant outlet line (8.2) disposed therein. The refrigerant outlet line (8.2) extends outwardly from the inlet located above the liquid level (7) of the refrigerant, starting from the refrigerant area in the gaseous state, through the area of the liquid refrigerant, . The boiling members 9, 9 'and 9' 'are arranged in the housing 10 in such a manner that the boiling members 9, 9' and 9 ' (8.2) in the region of the through-opening (14) such that liquid passing through the through-hole (14) through the boiling member (9, 9 ', 9 " Respectively.

Description

[0001] APPARATUS FOR SEPARATING AND STORING LIQUID REFRIGERANT OF A REFRIGERANT CIRCUIT [0002]

The present invention relates to an apparatus for separating and storing liquid refrigerant in a refrigerant circulation system. The apparatus comprises a housing formed of a collection container for a refrigerant, wherein the housing has a refrigerant outlet line disposed therein. The refrigerant outlet line extends outwardly from the inlet opening disposed above the liquid level of the refrigerant, starting from the refrigerant region in the gaseous state, via the liquid refrigerant region. The refrigerant outlet line in the liquid refrigerant region has a through opening. A boiling element for liquid refrigerant is disposed inside the housing.

In the case of refrigerant circulators of compression refrigerators known in the prior art, in various applications, in the direction of flow of the refrigerant, a refrigerant collector is arranged after the heat exchanger acting as an evaporator. The refrigerant collector, which is also referred to as an accumulator in the arrangement mode arranged after the evaporator, is a separator which, in addition to the storage of the refrigerant as the separator, discharges from the evaporator, which is present as a two- It is also used for phase separation of the refrigerant. The accumulator is also used for drying and filtering refrigerant. In the case of conventional, i.e. conventional, refrigerant circulation systems, in particular those used in heat pump systems, the compressors are arranged after the accumulator in the direction of the flow of the refrigerant, which means that during the initial operation of the refrigerant circulation system, Thereby causing a pressure drop of the refrigerant. In particular, when the amount of liquid in the accumulator is large, the liquid temperature does not fall at the same rate as the saturation temperature associated with the refrigerant pressure. As a result of the pressure drop, the boiling temperature of the refrigerant stored in the accumulator often drops significantly faster than the liquid phase refrigerant temperature, so that the refrigerant already exists as a superheated liquid that can suddenly evaporate due to the low impulse. Sudden evaporation of the superheated liquid refrigerant, also referred to as retardation of boiling, causes a situation in which the liquid refrigerant is suddenly switched to the gas phase, resulting in a large density drop, and the density drop is again unique Coupled with an extreme increase in volume. The sudden rise in pressure in the accumulator, which is caused by this inherent volume increase, then creates a pressure wave that flows through the entire refrigerant circulation system of the system, and this pressure wave again causes vibration and unwanted noise generation It causes. The pressure rise can also be heard by explosive sound, depending on its intensity, and can be sensed in accordance with vibration, especially in the vicinity of the accumulator. In addition, such pressure fluctuations and vibrations can cause considerable strain on the components of the refrigerant circulation system or the compression chiller, thereby damaging the components. With such a boiling delay, containers with less wetted surface area, generally with good surface quality, are very weak in resistance.

Accumulators of the type mentioned in the introduction are known, for example, from U.S. Pat. No. 5,970,738 A. The accumulator has a J-shaped tube on the side of the outlet for suctioning the refrigerant made up of the gaseous phase and the liquid phase, and the tube is arranged inside the housing of the accumulator and can at least locally contact the liquid phase of the fluid . The surface area that is substantially smooth and capable of contacting the liquid refrigerant of the J-shaped tube for recirculating gaseous refrigerant from the accumulator to the compressor can not ensure sufficient gas bubble formation to adequately block the imminent boiling delay to a desired degree.

US Patent 6 389 842 B1 provides a distinct increase in the flow cross section of the accumulator outlet tube to prevent noise generation that causes boiling delays and likewise noise such as explosions in the accumulators accordingly. The local increase in the flow cross section of such an accumulator refrigerant outlet line, which is arranged in a J-shape inside the accumulator, is extended and additionally has an outlet side or inlet side additional volume and an equivalent operating point , A pressure drop delay is caused in the accumulator as compared to an accumulator that does not have a flow cross-sectional increase at switch-on of the compressor disposed after the accumulator in the flow direction of the refrigerant. Furthermore, the increase in flow cross section results in a lower refrigerant flow rate, so that the liquid refrigerant inside the refrigerant outlet line at the time of switch-on of the compressor is evaporated and the risk of boiling delay is reduced. However, when using the proposed solution as described above, only the pressure drop process is delayed, and thus the degree of liquid superheat is only slightly reduced. The active introduction of the boiling delay by the design measures and the prevention of the boiling delay of the liquid refrigerant outside the J-shaped tube are not achieved.

In addition, conventional accumulators are only aimed at preventing the boiling delay of the liquid inside the J-shaped tube. However, the boiling delay can also occur in liquids stored or separated from the tube. Since there is a relatively large amount of liquid outside the tube, the sudden evaporation potential and noise level caused by boiling retardation are also significantly higher. The risk of boiling retardation of liquids stagnating outside the tubes increases even in accumulator applications, especially in the refrigerant circulation system of heat pump systems.

In addition, in the case of accumulators known in the prior art, the evaporation process of the liquid inside the J-shaped tube can not be actively introduced. The stagnant liquid results in a longer time interval to start the evaporation process without a boiling delay, due to the relatively slower suction pressure drop.

The object of the present invention is to provide an apparatus for the separation and storage of liquid refrigerant for a refrigerant circulation system of a compression refrigerant, in particular for an accumulator, which can reduce the risk of boiling delay of liquid refrigerant stored or separated outside the outlet tube . Such an arrangement should be able to improve the acoustic behavior of the refrigerant circulation system of an automobile, particularly with an electric drive system, a hybrid drive system and an internal combustion engine drive system. The apparatus should also be suitable for heat pump systems. In addition, in such cases, the cost of manufacturing, maintenance and installation of the device must be minimized.

This problem is solved by objects having the features of the independent patent claims. Improvements are described in the dependent patent claims.

This problem is solved by an apparatus according to the invention for separating and storing liquid refrigerant in a refrigerant circulation system. The apparatus comprises a housing formed of a collection container for a refrigerant, wherein the housing has a refrigerant outlet line disposed therein. The refrigerant outlet line extends outward from the inlet opening disposed above the liquid level of the refrigerant, starting from the refrigerant region in the gaseous state, through the liquid refrigerant region and has a through opening in the liquid refrigerant region. A liquid coolant boiling member is disposed inside the housing.

According to the concept of the present invention, the boiling member is disposed in such a manner that the liquid passing through the through-hole from the housing by the refrigerant suction in the gaseous state passes through the boiling member and is connected to the refrigerant outflow line in the through- have. In this case, the total mass flow of liquid preferably flows through the boiling member. The refrigerant outlet line extends outwardly from the inlet opening disposed within the housing, i.e., the refrigerant outlet line is guided around the housing through the housing wall. A through opening formed in the refrigerant outflow line means an opening formed inside the wall of the outflow line, which connects the volume surrounded by the wall to the periphery of the line. The refrigerant outlet line preferably has a curved tube shape, in particular a J-shaped shape. In this case, the through-hole is preferably formed in the region of the stopper, that is, the lower region or the change-over point of the outflow line. In addition to the J-shaped tube shape, the refrigerant outlet line may also have a U-shape or other shape and / or may be formed as a coaxial tube.

The lower region of the apparatus is preferably used for storage of the liquid refrigerant, while the upper region of the apparatus preferably directs the refrigerant to separate the vapor phase refrigerant and the liquid phase refrigerant, and in particular to discharge the vapor phase refrigerant Lt; / RTI >

According to an improvement of the invention, the device according to the invention comprises a refrigerant outlet line which is connected into the housing above the liquid level of the refrigerant. In addition, the device preferably has a cover member disposed within the housing. The cover member is disposed between the refrigerant supply line and the inflow opening of the refrigerant outflow line so as to be spaced apart from the inflow opening of the refrigerant outflow line so that the inflow opening from the refrigerant flowing into the housing through the refrigerant supply line Protected. The cover member is used to separate the liquid phase refrigerant and the gaseous phase refrigerant. The formation of such a cover member prevents the refrigerant liquid as a droplet from being swept together into the inlet opening of the refrigerant outflow line as a vapor inlet, and this inflow does not cause detachment of the apparatus and reduction in storage function.

In particular, the device according to the invention for separating and storing liquid refrigerants is also called a collector or accumulator, depending on the arrangement inside the refrigerant circulation system. When the device is disposed in the low pressure region of the refrigerant circulation system, that is, between the evaporator and the compressor in the flow direction of the refrigerant, the device is indicated by an accumulator, and when the device is arranged in the high pressure region of the refrigerant circulation system, When placed in the flow direction of the condenser / gas cooler, the device is marked as a collector.

According to a preferred embodiment of the present invention, the boiling member has outflow openings. The outlet openings preferably have a hydraulic diameter of up to 30 mm. In this case, the area of the boiling member to be perfused is the sum of the cross-sectional areas of the outflow openings of the outflow openings, which is larger than the cross-sectional area of the cross-section of the through-opening formed in the refrigerant outflow line. The outlet openings may alternatively be formed in a star shape, a square, a rectangle, a polygon, an ellipse, and / or may have an irregular shape.

According to a preferred embodiment of the present invention, the boiling member has a cylindrical shape, in particular a hollow cylindrical shape. Further, the boiling member preferably has a circular cross section.

According to an improvement of the present invention, a filter member is disposed in the through-hole. In this case, the filter member preferably has a shape conforming to the boiling member, and has a cylindrical shape, in particular a hollow cylinder shape. In addition, the filter member preferably has a circular cross-section.

According to a first alternative embodiment of the present invention, the boiling member is arranged coaxially with the filter member. In this case, it is preferable that the boiling member is disposed in such a manner as to be adjacent to the outer side face of the filter member by the inner side face, or the boiling member is disposed in such a manner as to be adjacent to the inner side face of the filter member by the outer side face. Therefore, the boiling member closes the filter member, or the filter member closes the boiling member, and as a result, the mass flow that flows through the through opening is guided not only through the boiling member but also through the filter member as a whole.

According to a second alternative embodiment of the present invention, the boiling member and the filter member are formed as an integral system. An integrated system means a unit combined into one component. In this case, the integral system consisting of the boiling member and the filter member preferably has a hollow cylindrical shape, preferably with a circular cross-section, i. E. An outer side face and an inner side face face. The filter element is preferably disposed in the outer lateral area of the system or the inner lateral area of the system or the outlet openings area.

According to a further alternative embodiment, the boiling member and / or the filter member have shapes different from the cylindrical shape. In this case, the boiling member and / or the filter member may have a spherical shape, an elliptical shape, a polygonal shape, a pointed shape or a blunt end shape, and may be formed in an irregular shape. Further, the basic shapes of the boiling member and the filter member may be different from each other.

In addition, the apparatus according to the present invention can also be used as a component of a coupling unit composed of an accumulator and an internal heat exchanger in the above-described preferred embodiments. In this case, the internal heat exchanger means a heat exchanger inside the circulation system, which is used for heat transfer between a refrigerant in a high-pressure region and a refrigerant in a low-pressure region. For example, in this case, the liquid refrigerant on one side continues to cool after condensation, and on the other hand, the suction gas is superheated before the compressor.

An advantage of the accumulator according to the invention is that due to the boiling member disposed in the housing, an increase in the contact surface for the refrigerant present in the liquid phase is achieved. As a result of this increase in the contact surface, the possibility of forming vapor bubbles on the liquid refrigerant increases and the boiling process outside the refrigerant outflow line is introduced as desired. Therefore, even if a rapid pressure drop occurs in the accumulator, do. As a result, the initial vapor bubble formation is used to prevent boiling delays and, for example, noise such as explosions starting from the accumulator caused by the boiling delay. Thus, this approach prevents unwanted noise generation that causes boiling delays and improves system sound insulation. Also, relatively low loads of additional components of the refrigerant circulation system of the accumulator and the compression chiller are preferably ensured, without sudden pressure fluctuations, and this situation increases the life of the chiller as a whole.

It will be appreciated that the compressible cooler can also be operated as a heat pump, so that the accumulator according to the present invention can be used in heat pump systems as well as compression compressors.

As the boiling member of the accumulator, a porous material or a porous production raw material, particularly for promoting bubble nucleation, may be used instead of the perforated material, for example, a sintered body having a prescribed porosity may also be used. Metallic, polymeric or ceramic materials or fabrication materials may also be considered. Preferably, when a porous material is used, a large contact surface of the refrigerant can be realized in a small space simultaneously with a small weight. In this case, all kinds of materials which not only promote the formation of vapor bubbles but also harmonize with oils and refrigerants are suitable. The accumulator may preferably be used for a variety of refrigerants. The housing, the refrigerant guide lines and the boiling member corresponding to the target are formed of a material resistant to refrigerant, in particular refrigerants R134a, R1234yf, R1234ze, R744, R600a, R290, R152a, R32 and mixtures thereof, . Aluminum or an aluminum alloy appears as a preferred material because aluminum has high mechanical strength, low weight and excellent durability.

The formation of vapor bubbles by use of aluminum is also facilitated by the use of materials such as copper, brass and stainless steel or plastic surface treated with low surface quality. Therefore, the surface areas of the boiling member can have as high a surface roughness as possible, in particular _a surface roughness of more than R _a 3.2 탆, and the surface area can be varied, for example by means of a variety of milling, etching or sandblasting Processing method. In this case, all kinds of materials which not only promote the formation of vapor bubbles but also harmonize with oils and refrigerants are suitable.

Further details, features and advantages of embodiments of the present invention will be apparent from the following detailed description of embodiments with reference to the accompanying drawings. Explanation of drawings:
1 is a view showing an apparatus for separating and storing liquid refrigerant as a component of a refrigerant circulation system of a compression type refrigerating machine having a boiling member disposed in a refrigerant outlet line region,
Figs. 2 and 3 are views showing a region of the refrigerant outlet line formed in a J-shape having a through opening, a filter member and a boiling member, and Fig.
Fig. 4 is a view showing a region of the refrigerant outlet line of the refrigerant outlet line formed in a J-shape having a through-hole and a system in which a filter member and a boiling member are formed in a combined manner.

1 shows a device 6 for separating and storing liquid refrigerant as a constituent part of a cooling circulation system 1 of a compression chiller having a boiling member 9, 9 ', 9 "arranged in the area of the refrigerant outflow line 8.2 ).

In addition to the accumulator 6, the refrigerant circulation system 1 comprises a compressor 2 for compressing gaseous refrigerant and / or liquid refrigerant in the flow direction of the refrigerant, a heat exchanger 3 operating as a condenser or gas cooler, 4) and a heat exchanger (5) operating as an evaporator. In this case, the accumulator (6) is disposed between the evaporator (5) and the condenser (2). The accumulator 6 can also be positioned at other positions of the refrigerant circulation system 1 as a collector, for example after the heat exchanger 5 on the high pressure side. If the refrigerant is liquefied, for example, in sub-critical operation, such as when refrigerant R134a is used, or in a particular ambient environment where carbon dioxide is used, the heat exchanger 5 is labeled as a condenser. Some heat transfer takes place at a constant temperature. During supercritical operation or during supercritical heat release in the heat exchanger (5), the temperature of the refrigerant decreases steadily. In this case, the heat exchanger 5 is also referred to as a gas cooler. Supercritical operation may occur in a particular ambient environment or operating mode of the refrigerant circulation system 1, for example, where carbon dioxide is used as the refrigerant.

A coolant supply line 8.1 extends between the evaporator 5 and the housing 10 of the accumulator 6 formed by the collecting container for the coolant and the coolant supply line is connected to the housing 10 from above. A refrigerant outlet line (8.2) formed in the form of a J-shaped tube is disposed in the housing (10), and the refrigerant outlet line is used for recirculating gaseous refrigerant and oil to the compressor (2) of the refrigerant circulation system . In this case, the inlet opening of the refrigerant outflow line (8.2) for the gaseous refrigerant is maintained above the liquid level (7) of the refrigerant, wherein the liquid level of the refrigerant reaches the upper level boundary between the liquid refrigerant and the gaseous refrigerant . The filter member 13, 13 ', 13' 'is disposed in the lower portion of the housing 10, and the filter member 13 (13', 13 '') 13 ", 13 ") are used to filter through mass flow of oil mass flow or liquid refrigerant, wherein the mass flow of oil or liquid refrigerant mass flows through openings 14 formed in the refrigerant outflow line 8.2, Lt; / RTI > In this case, the through-hole 14 is also referred to as an oil bore hole. Filter elements 13, 13 ', 13 ", also known as oil filters, are used to prevent clogging of through openings 14 by unwanted solid particles.

The cover member 11 in the housing 10 of the accumulator 6 also prevents the refrigerant from flowing from the undesired refrigerant flowing into the housing 10 through the refrigerant supply line 8.1 to the gas- So that the inlet opening is protected. The cover member 11 is used as a baffle plate of the refrigerant flowing into the housing 10 through the refrigerant supply line 8.1. The inflow opening for the vaporous refrigerant in the refrigerant outflow line (8.2) is located below the cover member (11) so that the vapor and liquid mixture of the refrigerant flowing into the accumulator (6) through the refrigerant supply line As shown in FIG. The refrigerant of the liquid component is guided to the lower region of the accumulator (6) along the cover member (11). The refrigerant in the vapor state or the gaseous state flows into the refrigerant outflow line (8.2) through the inflow opening arranged in a protected manner below the cover member (11).

An additional dryer element 12 is disposed in the region of the liquid level 7 to trap moisture circulating in the refrigerant circulation system 1. [ The bag-shaped dryer member 12 has hygroscopic properties. The dryer element may be disposed entirely below the liquid level 7, or completely above the liquid level 7, depending on the embodiment, and thus may be placed in the gas phase.

Inside the housing 10 of the accumulator 6 there is provided a boiling member 9, 9 ', 9 "as a geometrical boiling means, in order to increase the solid surface area which can contact the liquid refrigerant. (9, 9 ', 9 ") are arranged in the region of the J-shaped refrigerant outlet line (8.2) in the region of the stop, in particular in the region of the filter element (13, 13', 13" 9 ', 9 "is completely surrounded by liquid refrigerant.

The individual components of the accumulator 6 are preferably formed of aluminum or an aluminum alloy. Further, preferably all of the refrigerant guide lines connecting the components of the refrigerant circulation system 1 of the compression type cooler are formed of aluminum or an aluminum alloy.

In Figures 2 and 3 , a blocking region of the J-shaped refrigerant outlet line 8.2 of the device 6, with a through opening 14 formed in the oil bore hole and a filter element 13, 13 ' 9, 9 ') appear as geometric boiling means, respectively.

According to the embodiment of Figure 2, the filter element 13 is formed in a cylindrical shape, in particular in the form of a cylinder, in which case the liquid to be filtered, consisting of oil and refrigerant, can only penetrate through the lateral side of the cylindrical filter element 13 , And is discharged from the end face aligned toward the through-hole (14). The end face of the filter member 13, which is arranged at the end toward the through-hole 14, can not transmit liquid. The boiling member 9 is likewise formed into a cylindrical shape, particularly a cylindrical shape and a hollow cylindrical shape. The boiling member 9, which is preferably made of plastic, has a shape corresponding to the filter member 13 so that the inner surface of the boiling member 9 is sealed to the outer side surface of the filter member 13. The boiling member 9 is in contact with the outer side surface of the filter member 13 in such a manner as to seal the filter member 13 in a cylindrical shape, particularly a cylindrical inner surface or inner side surface. The boiling member 9 and the filter member 13 are disposed coaxially with each other. In this case, the boiling member 9 is configured so that the entirety of the liquid to be filtered which is sucked into the refrigerant outflow line 8.2 through the through opening 14 first penetrates the wall of the boiling member 9, 13) in a manner that passes through the side face of the filter member (13). The boiling member 9 is disposed in front of the filter member 13 and in front of the through opening 14 in the direction of flow of the liquid.

In the installation of the device 6 the boiling member 9 is pushed over the filter member 13 in the direction of movement 16 and is firmly fixed and connected to the refrigerant outflow line 8.2, (13).

According to the embodiment of Fig. 3, the boiling member 9 'has a cylindrical shape, in particular a cylindrical shape. The liquid to be filtered consisting of the oil and the refrigerant can only penetrate through the lateral side of the cylindrical boiling member 9 'and is discharged from the end surface aligned toward the through opening 14. [ The end face of the boiling member 9 ', which is aligned at the end toward the through-hole 14, can not transmit liquid. The filter element 13 'is likewise formed in a cylindrical shape, in particular a cylindrical shape and a hollow cylindrical shape. The boiling member 9 'is shaped to coincide with the filter member 13' so that the inner surface of the filter member 13 'abuts the outer lateral surface of the boiling member 9'. The boiling member 9 'is in contact with a cylindrical, in particular cylindrical, inner or inner side face in such a way as to seal the outer lateral face of the filter element 13'. The boiling member 9 'and the filter member 13' are arranged coaxially with each other. In this case, the filter element 13 'passes through the side face of the filter element 13', in which the entirety of the liquid to be filtered which is sucked into the refrigerant outflow line 8.2 through the through opening 14 is first formed into the filter area, And seals the boiling member 9 'in such a manner as to penetrate the wall of the member 9'. The boiling member 9 'is disposed after the filter member 13' in the flow direction of the liquid and in front of the through opening 14. [

In the installation of the device 6, the filter element 13 'is pushed over the boiling member 9' in the direction of movement 17 and tightly secured, and in particular to the refrigerant outflow line 8.2, And in a floating manner around the boiling member 9 '.

Regardless of the embodiment of Figure 2 or Figure 3, the filter element 13, 13 'comprises parts formed in the form of counter-hooks, for example not shown in the figure, 'Are provided on the filter members 13 and 13', respectively, so as to fix the boiling members 9 and 9 '. According to an alternative embodiment of the device 6, the boiling member 9 is interlocked with the filter member 13, or the filter member 13 'is interlocked with the boiling member 9'. In this case, either one of the boiling member 9, 9 'and the filter member 13, 13' or the boiling member 9, 9 'and the filter member 13, 13' all have a conical shape. The boiling members 9, 9 'and the filter members 13, 13' can likewise be bonded or pressed together. The subsequent pressing process is performed by an end cap disposed on the front end surface, not shown in the drawing. In this case, the front end surface is aligned with the end of the end surface arranged toward the through-hole 14. Another possibility of installing the boiling member 9 or the filter member 13 'is that the boiling member 9 is installed on the filter member 13 in a shrink fitting manner or the filter member 13' Is installed on the boiling member 9 'in a shrink fitting manner or by using a snap ring. Further, the boiling members 9, 9 'and the filter members 13, 13' may be attached to each other by local welding and / or by surrounding welding. The boiling member 9 is fixed in a self-holding manner to the filter member 13 or the filter member 13 'is fixed to the boiling member 9 (9) Quot;) in a self-sustaining manner. In the unassembled state, the boiling member 9 according to the embodiment of FIG. 2 has an inner diameter smaller than the outer diameter of the filter member 13. In the unassembled state, according to the embodiment of Fig. 3, the boiling member 9 'has an outer diameter larger than the inner diameter of the filter member 13'.

The walls of the boiling members 9, 9 'have outlet openings 15, 15', respectively, formed in holes or bores, the outlet openings being arranged in a regularly or irregularly distributed manner over the entire lateral extent. The individual outlet openings 15 and 15 'have a hydrodynamic diameter of up to 30 mm and in this case the flow area of the boiling members 9 and 9', ie the cross sectional sum of the outlet openings 15 and 15 ' Sectional area of the through-hole 14 formed in the bottom wall 8.2. According to an alternative embodiment of the boiling member not shown in the drawing, the outlet openings may also be formed in the end face area aligned with the end toward the through opening 14, or only in the end face area towards the through opening 14 And may be formed only in the end face region of the boiling member. In this case, the end surface of the filter member 13, which is arranged at the end toward the through-hole 14, can transmit the liquid.

Due to the switch-on of the compressor 2 of the refrigerant circulation system 1, the refrigerant in the gaseous state in particular is sucked from the accumulator 6 toward the compressor 2 via the refrigerant outflow line 8.2. Due to the refrigerant suction as described above, static pressure is set in the refrigerant outflow line 8.2 in the region of the through-hole 14, and the stop pressure is set to the same level as the refrigerant outflow line 22 for the same geodetic height, (8.2) It is lower than the external stopping pressure. The propulsive stop pressure difference that occurs in this case causes a mass flow into the refrigerant outflow line 8.2 through the through-opening 14, which has a defined velocity in the through-opening 14. The entire mass flow passing through the through openings 14 is first guided through the outflow openings 15, 15 'formed in the boiling members 9, 9'. In the regions of the outflow openings 15 and 15 'of the boiling members 9 and 9', the side faces of the filter members 13 and 13 ', partially engaged with each other, A higher flow rate is set in the arrangement of the filter elements 13, 13 'having no boiling member 9, 9'. Increasing the flow rate in the lateral area of the filter element 13, 13 'causes a local stop pressure reduction in the liquid. A relatively low quiescent pressure at the same temperature has the same meaning as an overheating increase of the liquid, wherein the increase in overheating causes a boiling process as a driving force. The boiling process introduction process is also augmented by additional turbulent flow inside the liquid. Such a flow is realized by flow control through the outlet openings 15, 15 'of the boiling member 9, 9'. The surface of the boiling member 9, 9 'may be roughly formed and / or the outflow openings 15, 15' may be formed so as to further enhance turbulence and crystal nucleation for boiling of the liquid flowing in the region of the boiling member 9, 9 ' 15 'have sharp edges.

The rough surfaces of the boiling members 9, 9 'which are beneficial for nucleation can be removed, for example by spraying, in particular by sandblasting, compression, brazing or welding, roughing, planing and / And is formed by processing. In addition, the use of a porous material also results in a rough surface of the boiling member 9, 9 '. When the boiling member 9, 9 'is formed of an injection molded part, the pointed outflow openings 15, 15' are formed in such a manner that no edge deburring of the outflow openings 15, 15 ' By the way of inserting the sleeves and / or forming a small radius of the region of the exit openings 15, 15 'in the injection molding tools.

Figure 4 shows the region of the stop of the refrigerant outlet line 8.2 formed in a J-shape with a through-opening 14 and a system formed by a filter element 13 "and a boiling member 9".

The embodiment according to Fig. 4 generally corresponds to the embodiment according to Fig. 2 or Fig. The difference from the embodiment according to Fig. 2 or Fig. 3 is the combined arrangement of the system consisting of the filter element 13 "and the boiling member 9" as a cylindrical part formed integrally or as a part. In this case, it is ensured that the entire mass flow of the fluid is guided and filtered through the filter element 13 ". As the filter element 13 ", the filter surface consists of a filter element 13 " In this case the filter element 13 "is formed by splashing or gluing on the boiling member 9 ", or at least one, for example at least one, Or by at least one external snap ring. The embodiment according to Figure 4 requires very low component complexity and minimal installation costs.

1: Refrigerant circulation system
2: Compressor
3: Heat Exchanger, Condenser / Gas Cooler
4: Expansion member
5: Heat exchanger, evaporator
6: Device, accumulator
7: Level of refrigerant
8.1: Refrigerant supply line
8.2: Refrigerant outflow line
9, 9 ', 9 ": boiling member
10: Housing
11: cover member
12: dryer member
13, 13 ', 13 ": filter element
14: Through hole
15, 15 ', 15 ": outlet opening
16: direction of movement of the boiling member 9
17: direction of movement of the filter member 13 '

Claims (10)

- a housing (10) formed from a collection container for a refrigerant, the housing having a refrigerant outlet line (8.2) arranged therein, the refrigerant outlet line being connected to a liquid level (7) extending outwardly through an area of the liquid refrigerant from the inlet disposed above the liquid refrigerant area and having a through opening (14) in the liquid refrigerant area; and
(6) for separating and storing the liquid refrigerant of the refrigerant circulation system (1), comprising boiling elements (9, 9 ', 9 ") for liquid refrigerant arranged inside the housing )as,
The boiling member 9, 9 ', 9''is configured such that the liquid passing through the through-hole 14 from the housing 10 is sucked into the boiling member 9, 9', 9 ' Is arranged in such a way that it is connected to the refrigerant outflow line (8.2) in the region of the through-opening (14) so as to pass through the liquid-refrigerant outlet (12). The method according to claim 1,
Characterized in that said boiling member (9, 9 ', 9 ") has outflow openings (15, 15', 15"). 3. The method according to claim 1 or 2,
Characterized in that the boiling member (9, 9 ', 9 ") has a cylindrical shape. 3. The method according to claim 1 or 2,
Characterized in that the filter element (13, 13 ', 13 ") is arranged in the through-hole (14). 5. The method of claim 4,
Characterized in that the filter element (13, 13 ', 13 ") has a shape conforming to the boiling member (9, 9', 9"). 5. The method of claim 4,
Characterized in that the boiling member (9, 9 ', 9'') is coaxially disposed on the filter member (13, 13', 13 ''). The method according to claim 6,
Characterized in that the boiling member (9) is disposed in such a way that it is in contact with the outer lateral face of the filter member (13) by an inner side face blade. The method according to claim 6,
Characterized in that the boiling member (9 ') is arranged in such a way that it is in contact with the inner side surface of the filter element (13') by means of an outer side face. 5. The method of claim 4,
Characterized in that the boiling member (9 ") and the filter element (13") are formed in an integrated system. 10. The method of claim 9,
Characterized in that the system consisting of the boiling member (9 ") and the filter member (13") has a hollow cylindrical shape with an outer lateral face and an inner lateral face, the filter member (13 " Characterized in that the liquid refrigerant separation and storage device is disposed in or on the inner lateral area of the system or in the outlet openings (15 ") area.

Images