KR20170004812A - Device for separating and collecting liquid refrigerant of a refrigerant circuit - Google Patents

Abstract

The present invention relates to apparatuses (1, 1, 1) for separating and collecting a liquid refrigerant in refrigerant circuits. The apparatuses (1, 1, 1) comprise: at least one first volume member (2) and a second volume member (3) confining internal volume parts within a specific range, respectively; at least one inlet (5, 5) for introducing a two-phase refrigerant consisting of a vapor phase and a liquid phase; and at least one outlet (24, 24) for discharging the vapor phase refrigerant. In this case, the volume members (2, 3) are reciprocally independent, and are also arranged and formed in a way that the volume members (2, 3) are directly connected to each other.

Description

TECHNICAL FIELD [0001] The present invention relates to a liquid refrigerant separating and collecting device for a refrigerant circuit,

The present invention relates to an apparatus for separating and collecting liquid refrigerant in a refrigerant circuit. The apparatus comprises at least two volume elements, each of which defines a range of internal volumes, at least one inlet for introducing refrigerant as a two-phase mixture, and at least one inlet for introducing vaporous refrigerant, Lt; / RTI > outlet.

A refrigerant circuit known from the prior art, especially a refrigerant circuit in an automotive air conditioning system, includes a collector and a reservoir with a desiccant. In this case, the reservoir containing the desiccant may be disposed inside the collector. When the refrigerant circulates inside the refrigerant circuit, it flows through the condenser, and the desiccant is directly supplied with the refrigerant. As an alternative, the desiccant may also be arranged in the region of the refrigerant circuit which is not directly perfused by the refrigerant. Even in this arrangement, the desiccant exerts the desired effect through the fluidic technical connection inside the refrigerant circuit. The collector including the desiccant may be formed on the high or low pressure level of the refrigerant circuit according to the system.

In this case, the collector is provided, on the other hand, for separating the liquid phase portion of the refrigerant, for example in order to protect the compressor, which is disposed downstream of the collector from the flow direction of the refrigerant, from an impact of liquid. On the other hand, the collector is able to store excess refrigerant in operating modes determined while accommodating the additional refrigerant as a leakage reserve for the expected refrigerant loss of the entire refrigerant circuit over the determined operating time do.

For example, the moisture contained in the system is constrained through permeation by the desiccant, especially in the case of refrigerant hoses. A further possibility of moisture penetration into the refrigerant circuit is the repair in the air conditioning system in which the refrigerant circuit is open or the refrigerant itself.

DE 10 2010 040 403 A1 discloses an apparatus for drying a refrigerant in an air conditioning system of an automobile. The apparatus includes a reservoir containing a desiccant and an antacid and being perfused by the refrigerant. The reservoir containing the desiccant is disposed inside the refrigerant collector.

DE 694 18 590 T2 describes a device for drying, filtering and collecting liquid refrigerant, which is preferably arranged on the high pressure side of the refrigerant circuit. In this case, the device is formed between the condenser and the expansion member in the flow direction of the refrigerant in order to remove foreign matter and moisture which may block the flow of refrigerant and / or condensation during expansion through the expansion member.

DE 43 149 17 A1 discloses a process for the separation of partially evaporated refrigerant while fading moisture and converting it into a moisture free refrigerant vapor containing a predetermined lubricating oil specific content, Discloses a collector of a refrigerant circuit. The collector includes an enclosed housing defining an inner vapor chamber, an inlet tube, an outlet tube having a steam junction at an upper portion of the steam chamber, and an upper portion and a lower portion within the steam chamber within the housing, And a baffle member for circulating the refrigerant in the chamber while allowing the refrigerant to rise to the upper region of the vapor chamber and to flow out through the outlet tube while interrupting the flow of the refrigerant, do.

Thus, known collectors from the prior art, including integrally disposed desiccants, are capable of removing moisture present in the form of water vapor, reserving solid particles, and introducing a predetermined amount of lubricant into the vapor flow exiting the collector And is also used as a reservoir for the refrigerant.

In particular, automotive air conditioning systems operated with refrigerants such as carbon dioxide (R744 in refrigerant engineering) or tetrafluoroethane (R134a in refrigeration engineering), R1234yf, HFO, R445A are known as "expansion orifice Orifice ", or an active or inactive expansion valve that is controllable particularly for use with R744, which is also used, for example, for setting the high pressure of the refrigerant circuit . In these two cases, the state of the refrigerant at the outlet of the evaporator is not defined, in other words the refrigerant is overheated, saturated, or exists as a two-phase mixture. A collector is arranged between the evaporator and the compressor of the refrigerant circuit and, accordingly, also referred to as an accumulator on the low pressure level.

The operating pressure in the refrigerant circuit containing carbon dioxide as the refrigerant is much higher than in the refrigerant circuit comprising R134a as the refrigerant so that the wall thickness of the refrigerant guiding components of the carbon dioxide-operated circuit as the high-pressure refrigerant is much greater. For example, to achieve the technically significant wall thickness of the accumulator, the diameter of the components should be minimized. Also, the formation of components with as small a diameter as possible has the effect of saving weight. However, in order to surround the required volume, the components with relatively smaller diameters are formed with relatively longer lengths.

The volume of the collector may not be sufficient, depending on each type of air conditioning system, and considering, for example, the mentioned required volume of the collector in relation to the occurring leakage or storage of the refrigerant in various operating modes.

In particular, when using an air conditioning system that includes carbon dioxide refrigerant, it should be noted that the average charge of the entire refrigerant circuit of 250 kg / dm 3 is not exceeded when designing the volume dimensions of the collector.

The object of the present invention is to provide a sufficiently large volume for the refrigerant, particularly a sufficiently large storage volume at the low pressure side of the refrigerant circuit. In this case, the parameters that determine the dimensional design are the mounting space available in the vehicle, and hence the length or diameter of the components of the refrigerant circuit, and the requirement for the provision of dense, weight optimized components.

The above problem is solved through the object having the features of the patent independent claim. Improvements are specified in the patent-dependent claims.

This problem is solved by an apparatus according to the present invention for not only separating and collecting liquid refrigerant in a refrigerant circuit but also for drying refrigerant in a refrigerant circuit. The apparatus of the present application comprises at least one first volume member and a second volume member each of which defines an internal volume portion. The apparatus of the present application is formed with one or more inlets for introducing two phase refrigerant containing vapor phase and liquid phase together with a liquid lubricant and one or more outlets for discharging refrigerant mainly containing a lubricant and a vapor phase. The vapor content of the refrigerant is in particular above 90%, and the vapor content can represent other values.

According to the inventive concept, the volume members are arranged and formed in such a way that they are independent of each other and in direct connection with each other. The direct connection of the volume members means that the refrigerant flows out of the one-side volume member and flows into the other-side volume member, and the state of coagulation of the refrigerant is kept unchanged between the volume members at the time of the overflow, and the volume members are separated from each other in space, Quot; As a result, the volume members are arranged in such a manner that no volume member is formed in the inner volume portion of the other-side volume member.

According to a preferred configuration of the present invention, the apparatus is configured in such a manner that a desiccant is disposed for drying the refrigerant within one or more of the volume members of the volume members.

The apparatus of the present application is preferably formed as a combination of hollow cylindrical volume members having different dimensions, especially different lengths and diameters. Depending on the configuration being replaced, the lengths and / or diameters of the volume members may have the same values. To the same extent, the volumes of the volume members may be the same or different.

The apparatus is preferably connected to the refrigerant circuit through refrigerant lines.

According to one improvement of the present invention, the first volume member is formed with an internal volume for collecting and separating the liquid refrigerant. In this case, the internal volume of the first volume member is provided only for collecting and separating the liquid refrigerant. According to an alternative configuration of the present invention, a desiccant reservoir containing a desiccant is additionally disposed in the interior of the first volume member, so that the first volume member can be used not only for collecting and separating the liquid refrigerant but also for drying the refrigerant .

According to a preferred embodiment of the present invention, a desiccant reservoir formed by including a desiccant is disposed inside the second volume member. According to a first alternative configuration of the present invention, the desiccant reservoir containing desiccant retains a volume corresponding to the internal volume of the second volume member. According to a second alternative configuration of the present invention, the desiccant reservoir containing desiccant is formed with a smaller volume than the internal volume of the second volume member, so that the second volume member not only contains the desiccant, Is also used to collect water.

A further preferred construction of the present invention is characterized in that an inlet for introducing the two-phase refrigerant is formed on the first volume member and an outlet for discharging the vapor phase refrigerant is formed on the second volume member. According to an alternative configuration of the present invention, an inlet for introducing the two-phase refrigerant is formed on the second volume member and an outlet for discharging the vapor phase refrigerant is formed on the first volume member. In this case, the volume members are preferably connected in series with each other, preferably in series with respect to the flow of the refrigerant, from the inlet leading into the apparatus to the outlet flowing out of the apparatus herein, and the volume members are continuously perfused by the refrigerant. In accordance with a further alternative configuration of the invention, an outlet for discharging the vapor phase refrigerant as well as an inlet for introducing the two-phase refrigerant is also formed on one volume member, in particular the first volume member.

The internal volumes of the volume members are connected to one another, preferably in two or more connection lines, in such a way that the first connection line is perfused by the vapor phase refrigerant and the second connection line is perfused by the liquid phase refrigerant.

According to a preferred configuration of the present invention, the first volume member is formed with a vapor line member for guiding the vapor phase refrigerant, and the vapor line member comprises two tubes arranged coaxially with each other with the inner tube and the outer tube, . The inner tube is formed in a manner that guides the vapor phase refrigerant toward the outlet of the volume member. In this case, the steam line member is preferably arranged such that, in relation to the perfusion of the desiccant reservoir containing the desiccant disposed therein,

- directed towards the desiccant reservoir after perfusion of the vapor line member, or

Guided towards the vapor line member after perfusion of the desiccant reservoir, or

- the desiccant reservoir and the vapor line member are independently perfused

.

The device according to the invention can additionally be combined with known collector and / or internal heat exchangers from the prior art of refrigerant circuits. In this case, the individual components, i.e., the collector or the accumulator, the dryer and the internal heat exchanger, are formed separately from each other. The internal volumes of the separately disposed components are interconnected with the refrigerant lines. In this case, the internal heat exchanger means a heat exchanger inside the circuit used for heat transfer between the refrigerant on the high-pressure side and the refrigerant on the low-pressure side. In this case, for example, on the one hand, the liquid refrigerant on the high pressure side is continuously cooled between the condensation process and the expansion process, that is to say after it has flowed out from the condenser, and on the other hand, the suction gas on the low pressure side is overheated before entering the compressor. The internal heat exchanger may be formed, for example, as a coaxial tube heat exchanger, with a device according to the invention made up of volume members, or with a single section of the device herein.

The device according to the invention, in summary, has various advantages as follows.

- providing a large volume for the refrigerant of the refrigerant circuit, especially a sufficiently large storage volume on its low pressure side, under conditions where the wall thickness of the component is optimal and its weight is minimal,

- Flexible configuration possibilities for very different mounting spaces,

- flexible extensibility as a single, dual or multiple evaporator system, including corresponding volumes of each of the refrigerant lines, and respective connection technologies, depending on the respective configuration of the refrigerant circuit,

- in an air conditioning system containing carbon dioxide, in particular as a refrigerant, a sufficient charge of the refrigerant under the conditions of maintaining the average density,

As a result,

- Ensure optimum operation of refrigerant circuits and air conditioning systems, including parallel or series-flow volume components for single or multiple evaporator systems.

Further details, features, and advantages of the inventive arrangements are set forth in the following description of embodiments with reference to the corresponding drawings. The figures each show a device for separating and collecting liquid refrigerant as a combined constitution of two volume members comprising different lengths and different formations of the inlets and outlets of the refrigerant, And the second volume member is formed to receive the desiccant.

1 is a schematic diagram showing an example in which the volume of a second volume member is used solely to receive a desiccant, the inlet of the refrigerant is formed on the first volume member, and the outlet is formed on the second volume member .
Figure 2 shows an example in which the volume of the second volume member is used to receive a portion of the desiccant and liquid coolant, the inlet of the coolant is formed on the second volume member, and the outlet is formed on the first volume member Fig.
Fig. 3 is a schematic diagram showing an example in which the volume of the second volume member is used to receive a portion of the desiccant and the liquid phase refrigerant, and the inlet and outlet of the refrigerant are formed on the first volume member.
4 is a detailed view showing a connection portion of the first volume member and the second volume member.

1 to 3 show devices 1, 1 'and 1 "for separating and collecting liquid refrigerant as a combination constitution of the first volume member 2 and the second volume member 3, respectively. In this case, the first volume member 2 is provided for collecting and separating the liquid refrigerant, and the second volume member 3 is provided for receiving the desiccant. The volume members 2 and 3 have different lengths L2 and L3 with similar or identical conditions of diameters D2 and D3 In this case, The volume portion surrounded by the volume member (2) is larger than the volume portion surrounded by the second volume member (3).

Depending on the alternative arrangements of the devices 1, 1 ', 1 ", the volume members 2, 3 have the same length L2, L3 and / or different diameters D2, D3 In this case, the dimensions of the volume members 2 and 3 are determined according to the mounting space provided, respectively The diameters D2 and D3 are preferably in the range of 40 mm to 100 mm and the lengths in the range of 20 mm to 500 mm In addition, in addition to the second volume member 3, The desiccant may be placed in the volume member 2 and accordingly in the two volume members 2 and 3. In this case, the desiccant may occupy a partial area of the internal volume of each volume member 2, Or occupies the entire internal volume of each volume member (2, 3).

Fig. 1 shows a device 1 comprising two volume members 2, 3 having different volumes. The internal volume of the second volume member 3 is used exclusively for the desiccant receptacle.

The first volume member 2 is formed with the inlet 5 of the refrigerant flowing into the device 1 in the upper region of the hollow cylindrical wall portion 4, i.e. in the upper region of the outer surface. In this case, the inlet 5 is arranged in such a way that the first volume member 2 is operated as a cyclone separator for separating the liquid phase on the vapor of the refrigerant. The wall portion 4 is closed by the cover member 6 in the case of the upper region at the end faces and by the bottom member 7 in the case of the lower region.

The inlet 5 disposed in the upper region of the wall 4 passes through the wall 4 into the interior volume of the volume member 2 in tangential fashion. The refrigerant starts from an unillustrated evaporator of the refrigerant circuit and flows into the cyclone separator through the inlet 5 as a two-phase mixture. The two-phase mixture is separated as a result of the rotational movement of the mass flow rate of the refrigerant about the longitudinal axis 8 of the cylindrical wall portion 4. The liquid flows downward due to gravity at the surface of the wall portion 4. The vapor is collected in the upper region of the internal volume of the volume member 2 so that the volume region 9 containing the vapor phase refrigerant in the upper region and the volume portion 10 containing liquid refrigerant in the lower region of the internal volume Is formed.

A steam line member 11, which is formed as a coaxial tube and is rotationally symmetric about the longitudinal axis 8, is disposed at the center of the internal volume portion of the first volume member 2. The outer tube of the vapor line member 11 is terminated inside the volume 9 of the vapor phase refrigerant, with the top open face. The lower closed surface includes only one or more through openings for introducing the lubricant collected in the upper portion of the bottom member 7 directly inside the volume 10 while terminating within the volume 10 of liquid refrigerant . The inner tube of the two tubes of the steam line member 11 is arranged in such a manner as to form a gap with respect to the closed end of the outer tube with the opened bottom surface to be protruded from the cover member 6 of the first volume member 2 do. The inner tube is connected to the first volume member 2 through the outlet 13 in the flow direction 15 in the vapor phase refrigerant drawn in the flow direction 12 through the gap between the coaxial tubes of the vapor line member 11 And is discharged upward. During the perfusion of the vapor phase refrigerant through the vapor line member 11, the refrigerant flows from the deflection region of the flow in the flow direction 12 into the inner tube through the clearance of the coaxial tubes, in the flow direction 14, Into the steam line member 11 and absorbs a predetermined amount of lubricant in the volume 10, which is used for lubrication of the compressor (not shown) of the refrigerant circuit. The refrigerant-lubricant mixture exiting through the outlet 13 is guided in the flow direction 15 through the connecting line 16 towards the second volume member 3 of the device 1.

The refrigerant-lubricant mixture flows into the second volume member 3 from the top through the inlet 17. The second volume member 3 likewise has a completely enclosed volume which is bounded at its periphery through the wall 18 and at the end faces through the lid member 19 in the case of the upper region, In the case of the area, it is closed through the bottom member 20. The internal volume of the second volume member 3 is used solely to accommodate the desiccant contained by the desiccant reservoir 21. The wall portion of the desiccant reservoir 21, which is formed, for example, as a cylindrical flexible bag and filled with a suitable desiccant, is permeable to the refrigerant. Since the desiccant reservoir 21 covers the entire flow cross-section of the second volume member 3, the refrigerant-lubricant mixture flows completely through the desiccant or through the desiccant, and the moisture is removed from the refrigerant. For reasons of pressure loss, the refrigerant may flow along the periphery of the desiccant reservoir 21, yet it is sufficient for drying the refrigerant. The desiccant reservoir 21 containing the desiccant may also be used as a filter for filtration of solid particles to the same extent.

The dried and substantially vaporous refrigerant-lubricant mixture is discharged from the second volume member 3 through the outlet 22 in the flow direction 15 and from the unshown compressor of the refrigerant circuit to the refrigerant line 23 and / And is sucked and discharged through the outlet (24) in the device (1).

The outlet 22 of the second volume member 3 is formed in the bottom member 20 of the volume member 3 and accordingly in the lower region thereof.

The volume members 2 and 3 are connected in series with respect to the flow of refrigerant from the inlet 5 into the apparatus 1 to the outlet 24 through which it exits the apparatus 1. In this case, the volume members 2 and 3 are continuously perfused by the refrigerant. As a result, the refrigerant flows into the first volume member 2 formed as a separator of the apparatus 1 as a two-phase mixture, and as the refrigerant-lubricant mixture, in the state in which the refrigerant is present in the vapor phase, 3, is dried as it flows through the second volume member 3, and is discharged from the apparatus 1 as a dry refrigerant-lubricant mixture.

The connection portions between the volume members 2, 3 and the additional reservoir-like volume members can be formed on the outer periphery of the members or on the end faces thereof. In this case, the internal volumes of the members must be formed with corresponding components such as ascending pipes for separation, collection or lubricant circulation.

According to an alternative embodiment, the device 1 of the present application comprises two connection lines 16a, 16b between the first volume member 2 and the second volume member 3 instead of the connection line 16 do. The connection lines 16a, 16b are shown only as dashed lines as an alternative embodiment. In this case, the first connection line 16a is disposed in the upper region of the volume members 2, 3, respectively, and into the outer surfaces of the wall portions 4, 18. Since the connecting line 16a extends through the volume member 2 inside the volume portion 9 containing the vapor phase refrigerant, the vapor phase refrigerant flows from the first volume member 2 into the second volume member 3 Guidance.

The second connection lines 16b are formed in the lower area of the volume members 2 and 3, respectively, and also pass into the outer surfaces of the wall parts 4 and 18, respectively. The connection line 16b is terminated in the volume portion 10 containing the liquid refrigerant in the interior of the first volume member 2.

According to the embodiment according to Fig. 1, the separation and collection of the refrigerant on the one hand and the drying of the refrigerant on the other hand are separated from each other in space. The liquid refrigerant is separated only in the first volume member (2).

In Fig. 2, an apparatus 1 'comprising two volume members 2, 3 with different volumes is shown. The practical differences from the embodiment according to FIG. 1, in particular the alternative embodiment, are the formation of a second volume member 3 associated with the arrangement of the desiccant reservoir 21 ' 5 ') and the outlet (24') of the refrigerant flowing out of the device (1 '). The same features and components of devices 1, 1 ', 1 "in Figures 1 to 3 are denoted by the same reference numerals.

A first region of the internal volume of the second volume member 3 is used for receiving the desiccant while a second region of the internal volume of the second volume member 3 is provided for the collection of vapor or liquid refrigerant do. Thus, in particular, one region of the volume of the second volume member 3 is formed for receiving the portions of the liquid refrigerant. In this case, the inlet 5 'can be arranged in such a way that the second volume member 3 can be operated as a cyclone separator. Compared to the device 1 of FIG. 1, the inlet 5 'of the refrigerant entering the device 1' is formed on the second volume 3 and the outlet 24 of the refrigerant flowing out of the device 1 ' 'Are formed on the first volume member 2.

The inlet 5 'is disposed in the upper region of the wall 18 closed by the lid member 19 and the bottom member 20 and the refrigerant starting from the unshown evaporator of the refrigerant circuit through the inlet 2 Into the apparatus (1 '). The liquid phase refrigerant flows downward to form the volume portion 10, while the vapor phase refrigerant is collected in the upper region of the internal volume portion of the volume member 3 as the volume portion 9.

The device 1 'includes two connection lines 16a', 16b 'between the first volume member 2 and the second volume member 3. In this case, the first connection line 16a 'connects the upper regions of the connecting members 2, 3 with the corresponding volume 9 of the vapor-phase refrigerant, while the second connection line 16b' Connects the lower region of the second volume member (3) with the first volume member (2) in the region of the volume portion (10) of the liquid phase refrigerant. In this case, the volume members 2 and 3 are connected to each other as containers that communicate with each other, so that the liquid refrigerant has a common level of liquid level due to the same pressure and gravity of the refrigerant inside the volume members 2 and 3 thereby forming a liquid level.

The desiccant reservoir 21 'is disposed above the liquid level including the desiccant contained therein. Because the desiccant reservoir 21 'covers the entire flow cross-section of the second volume 3, the vapor phase refrigerant entering the device 1' through the inlet 5 'is passed through the desiccant, And the moisture is removed from the refrigerant. However, immediate and direct perfusion of the desiccant is not required to dry the refrigerant. It is also sufficient to dry the refrigerant in that the desiccant reservoir 21 'is formed inside the volume members 2, 3 which are arranged in parallel and not directly perfused with the refrigerant. In this case, only the internal volume of the volume members 2 and 3 including the desiccant need only be connected to the refrigerant circuit. The first volume member 2 comprises a vapor line member 11 according to the embodiment of Fig. The vapor phase refrigerant passes through the inner tube of the vapor line member 11 and is drawn in and out of the second volume member 2 and the device 1 'through the outlet 24' in the flow direction 15. The refrigerant absorbs the lubricant in the volume portion 10 when the steam line member 11 is perfused.

The volume members 2 and 3 are connected in series with respect to the flow of refrigerant from the inlet 5 'into the device 1' to the outlet 24 'out of the device 1'. In this case, the volume members 2 and 3 are substantially continuously perfused by the refrigerant. The refrigerant is introduced into the second volume member 3 of the device 1 'formed with the desiccant reservoir 21' as a two-phase mixture, dried when the second volume member 3 is perfused, 1 volume member 2 and is introduced into the vapor line member 11 in a vapor phase as well as mixed with the lubricant when the vapor line member 11 is perfused, and the apparatus 1 'as a dry refrigerant- Lt; / RTI >

Figure 3 shows a device 1 "comprising two volume members 2, 3 with different volumes. The device 1 ' according to figure 1, in particular a substantial difference Are in the form of a second volume element 3 associated with the arrangement of the desiccant reservoir 21 'and at the outlet 24' of the refrigerant flowing out of the device 1 ''. A substantial difference to the device 1 'of FIG. 2 lies in the arrangement of the inlet 5 of the refrigerant entering the device 1' '.

In this case, the first region of the internal volume of the second volume member 3 is again used for receiving the desiccant, while the second region of the internal volume of the second volume member 3 is provided for collecting the refrigerant do.

The inlet 5 of the refrigerant flowing into the device 1 "as well as the outlet 24 of the refrigerant flowing out of the device 1" are also formed on the first volume member 2.

The device 1 "comprises two connection lines 16a ', 16b' between the volume members 2, 3 which are interconnected as containers in communication with each other, similar to the device 1 ' The first connection line 16a'connects the upper regions of the volume members 2 and 3 with the corresponding volume 9 of the vapor phase refrigerant while the second connection line 16b ' Connects the lower region of the second volume member 3 with the first volume member 2 in the region of the volume portion 10 of the liquid coolant. The desiccant reservoir 21 'containing the desiccant is disposed at the upper portion of the liquid level .

The volume members 2 and 3 are connected in parallel with respect to the flow of refrigerant from the inlet 5 flowing into the device 1 "to the outlet 24 'flowing out of the device 1". In this case, the volume members 2, 3 are virtually perfused independently of each other by the refrigerant. The second volume member 3 is used as a collector for enlarging the internal volume of the device 1 ", thus accommodating the refrigerant and providing an additional volume for receiving the desiccant.

The refrigerant-lubricant mixture sucked and discharged through the outlets 24 and 24 'of the device 1, 1', 1 '' is guided through the low-pressure side of the internal heat exchanger of the refrigerant circuit before being introduced into the compressor The device (1, 1 ', 1 ") connected to the upstream of the compressor on the low pressure side as the refrigerant collector is arranged upstream of the expansion member in the flow direction of the refrigerant on the high pressure side.

4, the connection between the first volume member 2 and the second volume member 3 is shown in detail.

The connecting lines 16a, 16b are welded or brazed to the wall portions 4, 18 of the volume members 2, 3. The connections between the volume members 2 and 3 may be formed through clamp connections, in particular clamp screw connections 25, and the clamp screw connections 25 may be arranged on the connecting members of the refrigerant lines have. The connecting members are again soldered or welded to the wall portions (4, 18). The connecting members are screwed together by a screw member (26).

1, 1 ', 1 "device
2 First volume member
3 Second volume member
4 wall portion of the first volume member (2)
5, 5 'Inlet of refrigerant flowing into device (1, 1')
6 Cover member of the first volume member (2)
7 The bottom member of the first volume member (2)
8 A vertical axis of the first volume member (2)
9 < / RTI > vapor phase refrigerant,
10 Volume part including liquid refrigerant
11 Steam line member
12 Flow direction of vapor phase refrigerant
13 An outlet of the refrigerant of the first volume member (2)
14 Flow direction of lubricant
15 Flow Direction of Refrigerant-Lubricant Mixture
16, 16a, 16b connecting lines
16a ', 16b'
17 The refrigerant inlet port of the second volume member (3)
18 wall portion of the second volume member (3)
19 The lid member of the second volume member (3)
20 The bottom member of the second volume member (3)
21, 21 'Desiccant reservoir
22 The refrigerant outlet of the second volume member (3)
23 refrigerant line
24, 24 'Refrigerant outflow from the device (1, 1')
25 Clamp connection
26 Screw
D2 Diameter of the first volume member (2)
D3 Diameter of the second volume member (3)
L2 The length of the first volume member 2
L3 Length of the second volume member (3)

Claims (10)

An apparatus (1, 1 ', 1 ") for separating and collecting liquid refrigerant in a refrigerant circuit,
- at least one first volume member (2) and a second volume member (3) each defining a range of internal volume,
- at least one inlet (5, 5 ') for introducing two phase refrigerant containing vapor phase and liquid phase,
- at least one outlet (24, 24 ') for discharging the vapor phase refrigerant,
Characterized in that the volume members (2, 3) are arranged and formed in such a way that they are independent of each other and directly connected to each other. The method according to claim 1,
Characterized in that a desiccant for drying the refrigerant is disposed in at least one of the volume members of the volume members (2, 3). 3. The method according to claim 1 or 2,
The liquid refrigerant separating and collecting device (1, 1 ', 1 ") according to claim 1 or 2, wherein the first volume member (2) has an internal volume for collecting and separating the liquid refrigerant. The method according to claim 2 or 3,
Wherein a desiccant reservoir (21, 21 ') including a desiccant is disposed inside the second volume member (3). The liquid refrigerant separating and collecting device (1, 1', 1 " 5. The method of claim 4,
The desiccant reservoir 21 'containing the desiccant has a smaller volume than the internal volume of the second volume 3 so that the volume 3 is formed to receive the desiccant and collect the refrigerant (1, 1 '). 6. The method according to any one of claims 1 to 5,
Characterized in that an inlet (5) for introducing the two-phase refrigerant is formed on the first volume member (2) and an outlet (24) for discharging the vapor phase refrigerant is formed on the second volume member Liquid refrigerant separation and collection device (1). 6. The method according to any one of claims 1 to 5,
An inlet 5 'for introducing the two-phase refrigerant is formed on the second volume member 3 and an outlet 24' for discharging the vapor phase refrigerant is formed on the first volume member 2 (1 '). 6. The method according to any one of claims 1 to 5,
Characterized in that an inlet (5) for introducing the two-phase refrigerant and an outlet (24 ') for discharging the vapor phase refrigerant are formed on the first volume member (2). . 9. The method according to any one of claims 1 to 8,
The internal volume portions of the volume members 2 and 3 are connected to each other by two or more connection lines 16a, 16b, 16a 'and 16b' through which the first connection lines 16a and 16a ' And the second connection lines (16b, 16b ') are connected to each other in such a manner that the second connection lines (16b, 16b') are flowed by the liquid refrigerant. 10. The method according to any one of claims 1 to 9,
The first volume member (2) is formed with a vapor line member (11) for guiding vapor-phase refrigerant, the vapor line member comprising two tubes arranged coaxially with each other with an inner tube and an outer tube Characterized in that the inner tube is formed in such a way that the vapor phase refrigerant is directed towards the outlet (13, 24 ') side.

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