EP2751502A1

EP2751502A1 - Evaporator heat exchanger unit

Info

Publication number: EP2751502A1
Application number: EP12759003.2A
Authority: EP
Inventors: Tilo Schaefer; Gholam Reza Zakeri
Original assignee: Magna Powertrain Bad Homburg GmbH
Current assignee: Hanon Systems EFP Deutschland GmbH
Priority date: 2011-08-31
Filing date: 2012-08-24
Publication date: 2014-07-09
Anticipated expiration: 2032-08-24
Also published as: WO2013029769A1; DE102011111964A1; JP2014525559A; US10024587B2; US20140174120A1; KR20140105429A; JP6072037B2; CN103765130B; EP2751502B8; EP2751502B1; DE112012003568A5; CN103765130A

Abstract

The invention relates to an evaporator heat exchanger unit for a heating/cooling module for a motor vehicle, comprising at least one collector compensation reservoir for collecting a coolant and one evaporator, by means of which at least part of the coolant can be converted into a gaseous form, characterized by a housing enclosing an inner chamber. In said inner chamber, the collector compensation reservoir, the evaporator, and a coolant are arranged, wherein an expansion organ is arranged on said housing, by means of which a coolant is conveyed to the evaporator.

Description

Evaporator heat exchanger unit

The invention relates to an evaporator-heat exchanger unit, and more particularly to an evaporator-heat exchanger unit for a heating-cooling module for a motor vehicle.

In known heating-cooling modules for a motor vehicle, a refrigerant is passed through a refrigerant circuit, said refrigerant circuit usually having at least a compressor, a gas cooler, an internal heat exchanger, an expansion element, an evaporator and a header reservoir. These components are, usually in the order mentioned, connected via refrigerant-conducting piping, wherein the refrigerant in the condenser / gas cooler heat withdrawn and heat is supplied in the evaporator. About this heat transfers a temperature control of the interior of a motor vehicle, a battery, a drive motor or electronics of the motor vehicle is made indirectly.

EP 1 990 221 A1 proposes, based on conventional heating-cooling modules for a motor vehicle, a heating-cooling module in which a condenser / gas cooler, an evaporator and an internal heat exchanger are integrated so that they form a closed unit form. As a result, lower installation costs are to be realized and the length of the installed refrigerant pipe to be lowered. In this case, such components are integrated into a closed unit, which have very different temperatures. The object of the invention is to enable an improved construction of a heating / cooling module for a motor vehicle in which suitable components are combined to form a unit. This task is performed by an evaporator heat exchanger Unit according to independent claim 1 solved. Preferred developments of this evaporator heat exchanger unit are the subject of the dependent claims.

The invention according to independent claim 1 offers the advantage that, in particular, those components of a heating / cooling module for a motor vehicle which have similar temperatures are at least partially disposed in a housing enclosed by a housing. This makes it possible in particular to minimize undesired heat transfer in the refrigerant circuit and to dimension the heating-cooling module smaller, resulting in cost and space advantages.

In the following, the invention will be described with reference to an evaporator-heat exchanger unit for a heating-cooling module for a motor vehicle, in particular for a motor vehicle operated electrically or by hybrid drive. However, the invention can also be used for a heating / cooling module of a motor vehicle with an internal combustion engine. Furthermore, the invention can also be used for heating-cooling modules in stationary applications, in particular buildings, or for heating-cooling modules in other applications.

An evaporator-heat exchanger unit for a heating-cooling module for a motor vehicle is proposed, comprising at least one collector surge tank for collecting a refrigerant and an evaporator, by means of which at least a portion of the refrigerant is converted into a gaseous state becomes. In this case, a housing, which consists of at least two housing parts and which encloses an interior, accommodates at least the collector expansion tank, the evaporator and a coolant, wherein an expansion element, via which the refrigerant is supplied to the evaporator, is arranged on this housing.

For the purposes of the invention, an evaporator-heat exchanger unit is understood to mean a device which is arranged in the refrigerant circuit of a heating-cooling module for a motor vehicle. In the refrigerant flow, the evaporator-heat exchanger unit is arranged between a gas cooler outlet and a compressor inlet. An evaporator-heat exchanger unit according to the invention has at least one header tank, an evaporator, a housing and an expansion element. The at least two housing parts having housing is designed such that it encloses an interior in which the header tank and the evaporator are arranged and which receives a coolant. Between this coolant and the refrigerant passed in the evaporator, a heat transfer is provided. As a result, in particular the functionality of a heat exchanger is realized in the housing. In this heat exchanger, the refrigerant supplied to the evaporator via an expansion element arranged on the housing absorbs heat from the coolant in the housing. After passing through the evaporator, the refrigerant is directed into the header tank and accumulates within the volume defined by the header tank.

For the purposes of the invention, a heating / cooling module for a motor vehicle is to be understood as meaning a refrigerant circuit which can be removed at different, at least two points, cold or heat, in particular by removing cold and / or heat from the vehicle compartment of a motor vehicle to temper. The heating and cooling module preferably has a gas cooler for removing heat from the refrigerant circuit, an evaporator for receiving heat in the refrigerant circuit, an internal Wärmetauscherein direction, an expansion device, a collector expansion tank and a compressor and lines, preferably piping, for guiding refrigerant between the individual components of the heating-cooling module. In addition, a heating-cooling module according to the invention on a coolant circuit, by means of which heat can be introduced into the refrigerant in the evaporator of the heating-cooling module.

For the purposes of the invention, a reservoir is to be understood as meaning a reservoir by means of which refrigerant can be collected, which is supplied to a volume within the reservoir reservoir, the reservoir reservoir in particular enclosing this volume. In the collector expansion tank, the refrigerant is preferably present in a high proportion of gaseous and a low proportion of liquid before. The header tank is used in the heating-cooling module in particular as a reservoir for refrigerant and thus in particular for regulating the pressure conditions in the heating-cooling module at different operating conditions.

Under a refrigerant in the context of the invention is a medium to understand, which is suitable, heat and cold transients of this refrigerant, preferably to a Coolant of the evaporator heat exchanger unit and / or air from the environment of the vehicle and / or the interior of the vehicle to assist. Such media are preferably provided as refrigerants, which are suitable for use in heating-cooling modules for a motor vehicle, in particular carbon dioxide (C0 _2l R 744) or tetrafluoroethane (R 134a).

For the purposes of the invention, an evaporator means a device of an evaporator-heat exchanger unit, by means of which at least a part of the refrigerant guided in the evaporator is transferred from a liquid to a gaseous state. The evaporator is thereby supplied via an expansion device relaxing refrigerant, wherein the evaporator preferably has a refrigerant-carrying length which is many times higher than each of the outer dimensions of the evaporator, whereby it has a large surface of a medium, in particular coolant, is surrounded. Preferably, the evaporator or its refrigerant-carrying elements is surrounded by coolant, which is heated to a higher temperature than the refrigerant, wherein the coolant heat is removed, and at the same time with the case of the refrigerant transferred energy at least a portion of the refrigerant is converted into a gaseous state. The coolant is thereby cooled and preferably used to cool the passenger compartment of the motor vehicle by heat is removed from the air in the passenger compartment by the cooled coolant. Likewise, the cooled coolant can be used to cool electronic components or engine components or a drive unit of engine and electronics or a battery of the motor vehicle by heat is removed from the component to be cooled by the cooled coolant.

For the purposes of the invention, a coolant is to be understood as meaning a medium which is suitable for delivering heat to a refrigerant to an evaporator and at the same time is suitable for extracting heat from the air of a passenger compartment of a motor vehicle, in particular by means of a heat exchanger suitable for this purpose. The coolant is taken in the context of the invention in the enclosed by the housing of the evaporator heat exchanger unit interior and flows around the evaporator. The coolant is preferably a water-containing medium, more preferably a water-based medium, in particular also water and / or a glycol-containing medium, in particular glycol. Under a housing in the context of the invention is a device to understand, which accommodates at least the header tank and the evaporator of the evaporator heat exchanger unit and a coolant. The housing encloses an interior, within which the collector expansion tank and the evaporator are arranged. This interior is at least partially, preferably substantially completely filled with coolant. On the housing an expansion element is arranged. For the purposes of the invention, this is to be understood as meaning that an expansion element can be arranged in a recess of this housing or within the interior enclosed by the housing or on the outside of the housing.

For the purposes of the invention, an expansion element is understood to be a reduction of the cross section in the refrigerant line to be passed through the refrigerant, at which the refrigerant flow can relax, the refrigerant before passing through the expansion element having a higher mass density and higher pressure after passing through the expansion element with lower mass density and lower pressure. After passing through the expansion element, the refrigerant is fed to the evaporator in the evaporator heat exchanger unit according to the invention. In a preferred embodiment of the evaporator heat exchanger unit according to the invention, the evaporator is arranged substantially around the collector expansion tank. This allows a space-saving, common arrangement of the evaporator and the header tank within the enclosed by the at least two housing parts interior of the housing of the evaporator heat exchanger unit. The arrangement of the evaporator around the collector surge tank is carried out in particular such that the largest possible surface of the evaporator for flushing through the coolant located in the housing is available, preferably by the length of the refrigerant-carrying elements of the evaporator is designed to be many times higher than each of the outside dimensions of the evaporator.

In a further preferred refinement of the evaporator-heat exchanger unit according to the invention, the housing cover has at least one inlet recess through which the refrigerants flow into the interior space enclosed by the housing. ordered, evaporator can be introduced, and at least one Auslassausnehmung, by the refrigerant from the, arranged in the interior, collector expansion tank can be executed. This inlet recess and this outlet recess preferably represent the refrigerant interfaces of the evaporator heat exchanger unit to those components of the heating / cooling module for a motor vehicle, which are not elements of the evaporator heat exchanger unit. Preferably, the refrigerant passes before entering the inlet recess or after exiting the Auslassausnehmung a heat exchanger device. The refrigerant also passes through an expansion element, which is arranged on the inlet recess. From the inlet recess, the refrigerant is passed into the evaporator.

Through the Auslassausnehmung refrigerant, which flows from the header tank, preferably a heat exchanger means continuously discharged in such a way that it passes to the compressor of the heating-cooling module. It passes through the, outside the housing of the evaporator heat exchanger unit extending, further refrigerant conductors, preferably refrigerant tubes, the heating-cooling module. In a further preferred development of the evaporator heat exchanger unit according to the invention, a heat exchanger device is arranged on the housing exterior, wherein in this heat exchanger device at least two spaced apart channels extend, and wherein in a first channel, a refrigerant flow to the expansion element and in a second channel, a refrigerant flow the collector expansion tank are guided such that heat is exchangeable between the refrigerant streams. The heat exchanger device is preferably formed integrally and preferably arranged on the housing, that the spaced-apart channels are coordinated at the interface to the housing such that the first channel with the inlet recess of the housing cover coincides and the second channel with the Auslassausnehmung the housing cover comes in cover. In this way, heat can be transferred between the refrigerant, which is introduced into the evaporator-heat exchanger unit and the refrigerant, which is discharged from the evaporator-heat exchanger unit. In a further preferred refinement of the evaporator / heat exchanger unit according to the invention, the housing has at least one inlet opening through which coolant can be introduced into the interior delimited by the housing and at least one outlet opening through which coolant can be diverted out of the interior delimited by the housing, wherein the coolant emits heat, in particular at the evaporator and preferably at the header reservoir. Through the inlet opening in the housing, relatively warmer coolant, in particular water or a medium, preferably water-based, is passed into the interior of the housing for circulating the evaporator. There, the coolant flows around the surface of the evaporator, which absorbs heat from the coolant due to the relatively colder refrigerant conducted in the evaporator, which then leaves the interior of the housing cooled by the outlet opening of the housing. In a further preferred refinement of the evaporator-heat exchanger unit, the header tank has at least one connecting channel through which refrigerant can be introduced into the header tank, and at least one outlet channel through which the refrigerant can be diverted from the header tank. Through this connection channel, refrigerant is supplied to the header tank from the evaporator, and this refrigerant collects in the header tank. Through the outlet channel refrigerant is removed from the collector surge tank and, preferably after passing through the heat exchanger means, fed to the compressor of the heating-cooling module. In a further preferred development of the evaporator-heat exchanger unit, the expansion element is arranged in the refrigerant flow between the heat exchanger device and the evaporator, wherein the expansion element is formed in an expansion-element recess of one of the housing parts. In particular, the formation of an expansion element recess is provided within the inlet recess of the housing of the evaporator heat exchanger unit.

In the sense of the invention, an expansion-element recess is to be understood as meaning a recess which is suitable for accommodating an expansion element in such a way that This expansion element in the refrigerant flow between a heat exchanger device and an evaporator can cause expansion of the refrigerant.

In a further preferred development of the evaporator-heat exchanger unit, the expansion element is arranged in the refrigerant flow between the heat exchanger device and the evaporator, wherein the expansion element is connected to one of the housing parts in particular fixed and at least indirectly. The expansion element is preferably arranged such that the refrigerant flow through the expansion member can be fed directly to the inlet recess of the housing or that the refrigerant flow through the inlet recess of the housing can be fed directly to the expansion device.

In a further preferred refinement of the evaporator-heat exchanger unit, the header tank has a header tank and a header header tank cover. The header tank is provided especially for collecting refrigerant. The header tank cover, together with the header tank, encloses an internal volume of the header tank. The connecting channel and / or the outlet channel is preferably arranged on the header tank cover or on the header tank.

In a further preferred development of the evaporator-heat exchanger unit, the header tank cover and one of the housing parts are formed substantially in one piece as a cover of the evaporator heat exchanger unit. This cover of the evaporator-heat exchanger unit is in each case not detachable, in particular soldered or welded, or detachably, in particular screwed, connected both to the at least one other housing part and to the collector-compensating tank pot. In the context of the invention, a lid of the evaporator-heat exchanger unit is understood to be a lid which, together with the at least one other housing part of the housing encloses the interior of the housing, and which, together with the collector-Ausgleichsbehältertopf, an inner volume encloses the collector reservoir. This inner volume of the collector Compensation container, which is arranged in the interior of the housing is delimited by this interior of the housing substantially refrigerant-tight and coolant-tight. The connection of the cover of the evaporator heat exchanger unit with the header tank is preferably designed as a solder joint or as a welded joint. The connections of the cover of the evaporator heat exchanger unit with the at least one other housing part are preferably designed as screw, in particular as screw with multiple screws.

In a further preferred development of the evaporator-heat exchanger unit, the cover of the evaporator-heat exchanger unit is designed as a distributor plate, wherein in this distributor plate at least one inlet recess, an outlet recess, a connection channel and an outlet channel are arranged.

In the context of the invention, a distributor plate is to be understood as meaning a cover of the evaporator-heat exchanger unit which is designed such that it directs the refrigerant from the heat exchanger device to the expansion element, from the expansion element to the evaporator, from the evaporator to the header reservoir and from the Can take over collector compensating tank for heat exchanger device.

In a further preferred development of the evaporator-heat exchanger unit, the expansion element is arranged in the inlet recess of the distributor plate. In a further preferred development of the evaporator-heat exchanger unit, this evaporator is designed substantially as a bent tube for conducting refrigerant. In this case, the evaporator is preferably arranged as a tube extending substantially helically around the header tank, more preferably with a plurality of windings arranged in a single-row, double-row or multi-row arrangement. In particular, the preferably bent tube is designed such that its entire length exceeds that of the external dimensions of the evaporator by a multiple. As a result, in particular, a heat exchange advantageous, large surface area of the refrigerant-conducting elements of the evaporator is achieved. But it is also possible to construct the evaporator in several parts, preferably of curved, tubular elements, which are each held to each other or to one or more structural parts. In a further preferred embodiment of the evaporator-heat exchanger unit, this evaporator is designed as a tube made of a good heat-conducting material, in particular metal. In a particularly preferred development of the evaporator is formed of an extruded profile with longitudinally oriented ribbing, wherein in addition to a arranged on the outside of the profile ribbing also in the interior of the profile, a ribbing can be provided. Within this preferably formed of aluminum profile refrigerant is passed.

In a further particularly preferred embodiment, the evaporator is formed from a profile with transversely oriented ribbing, wherein refrigerant is conducted within this profile, which is preferably made of aluminum. In another preferred embodiment, this ribbing is essentially formed on the housing side, whereby in particular the heat transfer between the evaporator and the coolant located in the interior of the housing is improved. Exemplary embodiments of the evaporator-heat exchanger unit according to the invention will become apparent from the following descriptions in conjunction with the figures, which show in detail:

1 shows an exemplary embodiment of an evaporator according to the invention

Heat exchanger unit; FIG. 2 is a sectional view of the exemplary embodiment of an evaporator-heat exchanger unit according to the invention from FIG. 1; FIG.

3 shows a further sectional view of the exemplary embodiment of an evaporator-heat exchanger unit according to the invention from FIG. 1;

4 shows a section of the exemplary embodiment of an evaporator-heat exchanger unit according to the invention cut in the distributor plate

Fig. 1; 5 shows a 3D representation of the exemplary embodiment of an evaporator-heat exchanger unit according to the invention from FIG. 1;

6 shows a further 3D representation of the exemplary embodiment of an inventive evaporator heat exchanger unit from FIG. 1.

Fig. 1 shows an exemplary embodiment of an evaporator heat exchanger unit according to the invention. In this exemplary embodiment, the housing 10 of the evaporator heat exchanger unit 1, a first housing part 15 and a second housing part 17. In this case, the first housing part 15 is formed as a distributor plate 16 and at the same time as a header tank cover 36. In this exemplary embodiment, the first housing part 15 is formed of a metal material.

In the distributor plate 16 is formed in each case a bore for the connecting channel 31 and for the Expansionsorganausnehmung 13, wherein the connecting channel 31 by the seal 31 a and the Expansionorganausnehmung 13 by the seal 13 a pressure-tight and fluid-tight against the environment of the evaporator heat exchanger unit 1 is sealed ,

Relative to the longitudinal axis of the evaporator heat exchanger unit 1, a heat exchanger device 50 is arranged on the side of the distributor plate 16 which is not connected to the second housing part 17. This heat exchanger device 50 is designed as a plate heat exchanger, d. H. it has a package of a plurality of brazed together, each formed with a specific contour sheets. The contours of these soldered sheets are designed such that they allow a line of refrigerant in two separate channels, a first channel 51 and a second channel 52 (both not shown in Fig. 1).

On the side of the heat exchanger device 50 remote from the housing, a refrigerant dock 60 is arranged, which has interfaces for the refrigerant supply and removal (both not shown in FIG. 1). The second housing part 17 has an inlet opening 12a, which serves as a coolant supply 71, and an outlet opening 12b, which serves as a coolant discharge 72. In this exemplary embodiment, the second housing part 17 is formed of a plastic material, but may also be formed of other materials such as a plastic composite material or a metal material.

The first housing part 15 and the second housing part 17 are in this embodiment by eight housing screws 81 releasably connected to each other, but may be connected to each other in other embodiments in other ways.

In the description of the following figures, substantially identically formed elements of the evaporator-heat exchanger unit are denoted by the same reference numerals as the corresponding elements of the evaporator-heat exchanger unit in Fig. 1.

2 shows a sectional view in the plane BB of the exemplary embodiment of an evaporator heat exchanger unit 1 according to the invention from FIG. 1. In this embodiment, refrigerant is introduced into the first duct by means of a refrigerant supply 61 (not shown in FIG. 2) of the refrigerant docks 60 51 of the heat exchanger device 50 introduced. In this case, heat is transferred from the refrigerant in the first channel 51 to the refrigerant in the second channel 52 in the heat exchanger device 50, which is designed in this exemplary embodiment as a plate heat exchanger.

The refrigerant from the first channel 51 then flows out of the first channel 51 into the expansion device recess 13 (not shown in FIG. 2), which is excluded from the first housing part 15 of the housing 10, in this exemplary embodiment, the first housing part 15 as a distributor plate 16 is formed.

From the expansion organ 13, the refrigerant flows to the inlet recess 1 1 a, then the refrigerant is supplied to the evaporator 20, where it is guided in the evaporator coil 21. The evaporator coil 21 is used as a spiral executed in a plurality of turns around the header tank 30, wherein the refrigerant is led away in an outer Windungspaket of the distributor plate 16 and guided in an inner winding package back to the distributor plate 16. However, the evaporator coil 21 also has a non-spiral bent part, by means of which the refrigerant is supplied after passing through the spiral part of the evaporator coil 21 to the connecting channel 31 of the header tank 30 compensation. While the refrigerant passes through the evaporator 20, the proportion of the gaseous refrigerant increases, wherein the proportion of liquid present refrigerant decreases.

The energy required for this purpose is supplied to the refrigerant in particular via a heat transfer from a coolant which flows around the evaporator coil 21 of the evaporator 20, passing through the interior 18 of the housing 10, ie between the walls of the second housing part 17, the distributor plate 16 and the collector -Ausgleichsbehältertopfs 35 is added. The coolant supply 71 takes place in this exemplary embodiment via the inlet opening 12a of the second housing part 17. After heat transfer from the coolant to the refrigerant in the evaporator 20, the coolant discharge 72 via the outlet opening 12b of the second housing part 17, wherein preferably a continuous coolant flow through the interior 18 of the housing 10 is provided.

FIG. 3 shows a further sectional view of the exemplary embodiment of an evaporator-heat exchanger unit 1 according to the invention from FIG. 1 in the plane AA, the course of which can also be taken from the illustration in FIG. 2. After the refrigerant has passed through the evaporator 20, it is transferred via the connecting channel 31 into the header tank 30, where at least a portion of the liquid present portion of the refrigerant collects in the header tank 35. From the collector expansion tank 30, a dependent on the operating conditions in the refrigerant circuit of the heating-cooling module amount of refrigerant via the outlet channel 32 and the Auslassausnehmung 1 1 b (not shown in Fig. 3) of the housing 10 in turn the heat exchanger device 50th supplied in the second channel 52 to receive heat there from the refrigerant in the first channel 51 of the heat exchanger device 50. After passing through this second channel 52 of the heat exchanger device 50, the refrigerant discharge 62 (not shown in FIG. 3) from the refrigerant dock 60 from the evaporator heat exchanger unit 1 to other components of the heating-cooling module, in this exemplary embodiment of the compressor.

The interior 18 of the housing 10 is enclosed in this exemplary embodiment of the distributor plate 16 and the second housing part 17, wherein distribution plate 16 and second housing part 17 by means of a plurality of housing screws 81 are screwed together with each other. At the distributor plate 16, which also assumes the function of the collector surge tank cover 36 in this exemplary embodiment, the collector surge tank 35 is arranged fluid-tight and pressure-tight by means of a solder joint.

4 shows a sectional view in the distributor plate 16 of the exemplary embodiment of an inventive evaporator heat exchanger unit 1 from FIG. 1 (sectional plane D-D). In the inlet recess 11 a, the refrigerant is discharged from the expansion element recess 13. Before that, an expansion element 40 is arranged, which is designed, for example, as a fixed throttle 41. The expansion element recess 13 is formed as part of the inlet recess 11a. At the fixed throttle 41, the refrigerant expands, whereby the pressure of the refrigerant in the refrigerant flow after passing through the expansion device 40 decreases. Likewise, the temperature of the refrigerant decreases.

After passing through the fixed throttle 41, the refrigerant in the inlet recess 1 1a is liquid to a large extent and to a small extent gaseous and is supplied via the refrigerant interface 33 to the evaporator 20 in its evaporator coil 21. After the refrigerant has passed through the evaporator 20, it is fed into the header tank 30 through the refrigerant interface 34 via the communication passage 31 through which it passes.

In the distributor plate 16, the Auslaßausnehmung 11 b is additionally arranged - with the outlet channel 32 -, via the outlet channel 32 and the Auslassausnehmung 11 b refrigerant from the collector surge tank 30 is guided in the second channel 52 of the heat exchanger device.

5 and 6 show two different 3D sectional views of the exemplary embodiment of an evaporator-heat exchanger unit 1 according to the invention from FIG. 1. This is intended to further clarify the arrangement of the individual components relative to one another. In particular, the arrangement of the refrigerant supply 61 and the refrigerant discharge 62 is shown on the refrigerant dock 60, which had not emerged from the previous figures.

In addition, the route of the refrigerant, starting with the refrigerant supply 61, is illustrated by the heat exchanger device 50, by the expansion element 40, by the evaporator 20 and by the header surge tank 30 until the refrigerant discharge 62.

The first channel 51 of the heat exchanger device 50 is arranged beginning at the refrigerant supply 61. It is formed in its further course by a package of a plurality of mutually soldered, each punched in a particular contour sheets, which is formed by this punched contour a separated from the second channel 52 refrigerant conductive cavity in which the refrigerant of the Expansion organausnehung 13 is supplied , In the analog second channel 52, the refrigerant is transferred after passing through the evaporator 20 from the header tank 30 to the refrigerant discharge. Between the refrigerant flows in the first channel 51 and in the second channel 52, a good heat transfer to the refrigerant in the second channel 52 occurs due to this design. LIST OF REFERENCE NUMBERS

I evaporator heat exchanger unit 10 housing

I I a inlet recess

1 1 b outlet recess

12a inlet opening

12b outlet opening

13 expansion organ recess

13a seal

15 first housing part

16 distributor plate

17 second housing part

18 interior

20 evaporators

21 evaporator coil

30 collector reservoir

31 connection channel

31 a seal

32 exhaust duct

33 refrigerant interface to the evaporator

34 refrigerant interface from the evaporator

35 Collector reservoir tank

36 collector reservoir cap

40 expansion organ

41 fixed throttle 50 heat exchanger device

51 first channel

52 second channel 60 refrigerant dock

61 Refrigerant supply

62 Refrigerant discharge

71 Coolant supply

72 Coolant removal

81 housing screw

Claims

claims

An evaporator heat exchanger unit (1) for a heating / cooling module for a motor vehicle, comprising at least

- A collector surge tank (30) for collecting a refrigerant, and

- An evaporator (20) by means of which at least a portion of the refrigerant is convertible into a gaseous state, characterized by a housing (10) which consists of at least two parts (15, 17) and which encloses an inner space (18)

in this interior space (18) the header tank (30), the evaporator (20) and a coolant are arranged, and wherein

on this housing (10) an expansion element (40) is arranged, via which the evaporator (20) refrigerant is supplied.

Evaporator heat exchanger unit (1) according to claim 1, characterized in that

this evaporator (20) is arranged substantially around the collector surge tank (30).

Evaporator heat exchanger unit (1) according to one of the preceding claims, characterized in that

the housing (10) has at least one inlet recess (11a) through which the refrigerant can be introduced into the evaporator (20) and has at least one outlet recess (11b) through which the refrigerant from the header reservoir (30) is derivable.

4. evaporator heat exchanger unit (1) according to one of the preceding claims, characterized in that

on the housing (10) outside the housing a heat exchanger device (50) is arranged, wherein

at least two spaced-apart channels (51, 52) extend in the heat exchanger device (50), and a refrigerant flow to the expansion element (40) in a first channel (51) and a refrigerant flow from the collector in a second channel (52) -Ausgleichsbehälter (30) are guided such that heat is exchangeable between the refrigerant streams.

5. evaporator heat exchanger unit (1) according to one of the preceding claims, characterized in that

this housing (10) has at least one inlet opening (12a) through which coolant can be introduced into the interior space (18) enclosed by the housing, and has at least one outlet opening (12b) through which coolant flows out of the housing (10) Interior (18) is deflectable.

6. evaporator heat exchanger unit (1) according to one of the preceding claims, characterized in that

the header tank (30) has at least one connection channel (31) through which refrigerant can be introduced into the header header tank (30) and has at least one outlet channel (32) dischargeable from the header header tank (30) by the refrigerant is.

7. evaporator heat exchanger unit (1) according to one of claims 4 to 6, characterized in that

this expansion element (40) is arranged in the refrigerant flow between the heat exchanger device (50) and the evaporator (20), the expansion element (40) being formed in an expansion element recess (13) of one of the housing parts (15, 17).

8. evaporator heat exchanger unit (1) according to one of claims 4 to 6, characterized in that

this expansion element (40) is arranged in the refrigerant flow between the heat exchanger device (50) and the evaporator (20), wherein the expansion element (40) is connected to one of the housing parts (15, 17).

9. evaporator heat exchanger unit (1) according to one of the preceding claims, characterized in that the collector surge tank (30) has a header tank compensation tank (35) and a header tank cover (36).

10. evaporator heat exchanger unit (1) according to claim 9, characterized in that

one of the housing parts (15) and the header tank cover (36) are substantially integrally formed as a cover of the evaporator heat exchanger unit, wherein

this cover of the evaporator-heat exchanger unit with the at least one other housing part (15) and with the collector-Ausgleichsbehältertopf (35) is respectively connected.

11. evaporator heat exchanger unit (1) according to claim 9, characterized in that

the lid of the evaporator-heat exchanger unit is formed as a distributor plate (16), wherein

in this distributor plate (16) at least one inlet recess (1 1a), an outlet (1 1 b), a connecting channel (31) and an outlet channel (32) are arranged.

12. evaporator heat exchanger unit (1) according to claim 10, characterized in that

a part of the inlet recess (11a) of this distributor plate (16) is designed as expansion organ recess (13), and in this expansion element recess (13) the expansion element (40) is arranged.

13. evaporator heat exchanger unit (1) according to one of the preceding claims, characterized in that

this evaporator (20) is designed substantially as a bent tube (21) for conducting refrigerant.

14. evaporator heat exchanger unit (1) according to one of the preceding claims, characterized in that

this evaporator (20) is formed as an extruded metal profile, in particular as an aluminum profile, with longitudinally oriented ribbing, wherein refrigerant is conducted within this metal profile.

15. evaporator heat exchanger unit (1) according to one of claims 1 to 13, characterized in that

this evaporator (20) is formed as an extruded metal profile, in particular as an aluminum profile, with transversely oriented ribbing, wherein refrigerant is passed within this metal profile.