DE102018201581A1 - Electromotive refrigerant compressor - Google Patents

Abstract

The invention relates to an electromotive refrigerant compressor (12) of a motor vehicle (2) which has a compressor housing (50) with a compressor compartment (52) within which a compressor (54) is arranged, which is arranged in a high - pressure compartment (56) of the compressor housing (50 ) opens. The high-pressure compartment (56) is lined with an insert (60). The invention further relates to a motor vehicle (2) with a refrigerant circuit (8).

Description

The invention relates to an electromotive refrigerant compressor of a motor vehicle and a motor vehicle having a refrigerant circuit.

Motor vehicles usually have an air conditioner, by means of which a temperature control of an interior of the motor vehicle takes place. Also, when powered by an electric motor vehicles, the required energy storage, such as a high-voltage battery, cooled. The air conditioning system has a refrigerant circuit, which comprises a refrigerant compressor, downstream of a condenser and this fluidly downstream of an evaporator. This is fluidly connected downstream of another heat exchanger, which is in thermal contact with a fan line leading into the interior of the motor vehicle, or with any energy cells of the high-voltage energy storage. The refrigerant circuit is filled with a refrigerant, such as R134a, R1234yf or CO2.

During operation, a pressure of the refrigerant is increased by means of the refrigerant compressor, which leads to an increase in the temperature of the refrigerant. This is conducted to the condenser, which is in thermal contact with an environment of the motor vehicle. Here, a temperature reduction of the refrigerant, which is in turn relaxed in the downstream evaporator to the original pressure, which is why the temperature of the refrigerant is further reduced. In the downstream heat exchanger is transferred from the thermally contacted with the heat exchanger component thermal energy to the refrigerant, resulting in a cooling of the component and heating of the refrigerant. The heated refrigerant is again supplied to the refrigerant compressor for closing the refrigerant cycle.

For compressing the refrigerant, a compressor head is usually used, by means of which the refrigerant is compressed and moved in the refrigerant compressor. In this case, for example, a pulse-like compression of the refrigerant is given, which is then introduced in a pulse-like manner into a high-pressure compartment of the refrigerant compressor. Due to the intermittent operation and due to the movement of the refrigerant as well as due to the movement of any mechanical parts of the refrigerant compressor is a noise that can be bothersome in an interior of the motor vehicle. In particular, a resonance frequency and a radiation characteristic of sound waves of the compressor head are matched to the respective type of motor vehicle. Here, it is also necessary that the compressor head met certain structural specifications for installation in the motor vehicle. Thus, it is necessary that for each type of vehicle, a respective associated refrigerant compressor is adjusted. As a result, on the one hand a development for different vehicle types is required on the one hand. In this case also different tools and the like must be kept in the production, which further increases manufacturing costs. On the other hand, for example, in a repair in a workshop or in the manufacture of motor vehicles, different refrigerant compressor must be maintained for the different types of vehicles, which in turn leads to increased costs.

The invention has for its object to provide a particularly suitable electromotive refrigerant compressor of a motor vehicle and a particularly suitable motor vehicle, in particular reduced manufacturing costs and / or maintenance is simplified, wherein suitably acoustic impression is improved.

With regard to the electromotive refrigerant compressor, this object is achieved by the features of claim 1 and in terms of the motor vehicle by the features of claim 10 according to the invention. Advantageous developments and refinements are the subject of the respective subclaims.

The electromotive refrigerant compressor is a component of a motor vehicle. Preferably, the electromotive refrigerant compressor is electrically contacted with an electrical system of the motor vehicle and / or operated with an electrical voltage of a few volts up to 1000V, in particular with an electrical voltage of 12V, 24V, 48V, 288V, 450V, 650V or 830V. By means of the electromotive refrigerant compressor, a refrigerant is compressed during operation. The refrigerant is, for example, a chemical refrigerant such as R134a or R1234yf. Alternatively, the refrigerant is CO2. Preferably, the refrigerant compressor is designed such that by means of which the respective refrigerant can be compressed, for example, an increase in pressure between 5bar and 20bar. For example, the electromotive refrigerant compressor is signal technically coupled to a bus system, in particular a LIN or CAN bus.

The refrigerant compressor is in particular a component of a refrigerant circuit (refrigeration cycle), which serves for example for the air conditioning of an interior or the cooling of an energy store of the motor vehicle, such as a high-voltage battery. The refrigerant circuit further includes, in particular, an (air) condenser, and an evaporator. The condenser is fluidly connected between the electromotive refrigerant compressor and the evaporator. Preferably, the refrigerant circuit comprises another Heat exchanger, which is connected between the evaporator and the electromotive refrigerant compressor, and which is preferably thermally contacted with another component of the motor vehicle, such as a fan line of an air conditioner or an energy storage, such as a high-voltage energy storage. The refrigerant circuit is filled in particular with a refrigerant, for example a chemical refrigerant, such as R134a, R1234yf, or with CO2.

By means of the electromotive refrigerant compressor, a pressure of the refrigerant is increased during operation, which is subsequently passed to the condenser, which is preferably in thermal contact with an environment of the motor vehicle. Suitably, by means of the capacitor, a temperature equalization of the refrigerant to the ambient temperature or at least a decrease in the temperature of the refrigerant. With the downstream evaporator, the refrigerant is expanded, which is why the temperature of the refrigerant is further reduced. In the downstream further heat exchanger is transferred from the thermally contacted with the other heat exchanger component thermal energy to the refrigerant, resulting in a cooling of the component and heating of the refrigerant. The heated refrigerant is preferably supplied again to the refrigerant compressor for closing the refrigerant circuit.

The electromotive refrigerant compressor has a compressor housing with a compressor compartment. Within the compressor compartment, a compressor is arranged, which is for example a scroll compressor. For example, the complete compressor is located within the compressor compartment or just part of the compressor, such as a compressor head. Here, in operation, the refrigerant is passed through the compressor and compressed due to a movement of the compressor or at least a component of the compressor relative to another component of the Verpächters. Due to the movement in this case a noise, that is a formation of sound waves within the refrigerant takes place.

The compressor opens into a high pressure compartment of the compressor housing. In particular, a compressor outlet of the compressor opens into the high-pressure compartment. Consequently, the compressor housing on two compartments, which are for example separated from each other and in particular fluid-technical or pressure-tight sealed from each other. Alternatively, the two subjects merge. Here, the high pressure side of the compressor is fluidly coupled to the high pressure compartment and goes in particular without further components in this. Alternatively, for example, a valve, in particular a check valve, is arranged between the compressor and the high-pressure compartment. During operation, the compressed refrigerant is thus in the high-pressure compartment and, in particular, is discharged therefrom into further components of the refrigerant circuit, in particular a conduit.

The high-pressure compartment is lined with an insert. In other words, the electromotive refrigerant compressor has the use for the high-pressure compartment. The use here is to influence the noise and in particular the attenuation of an emerging sound or at least a certain frequency range of the sound. Suitably, the use is adapted to a particular type of motor vehicle or a specific operating performance of the electromotive refrigerant compressor. In other words, in particular a damping of certain sound components takes place by means of the insert. Preferably, the insert has no further function.

For example, by means of the insert there is a displacement of a resonant frequency of the electromotive refrigerant compressor, so that the resonant frequency is displaced, in particular, comparatively far away from the frequency of a vibration of the electromotive refrigerant compressor resulting during normal operation. In particular, an impedance jump for sound waves of at least one specific frequency range is provided by means of the insert. In other words, the insert has a deviating from the compressor housing impedance. Due to the impedance jump, an introduction of the sound waves is reduced in the compressor housing. Suitably, the impedance of the insert is chosen such that the sound waves are absorbed or reflected, in particular a majority of at least one specific frequency range. In summary, introducing the sound waves into the compressor housing is avoided or at least reduced, so that a sound radiation of the compressor housing is reduced to the outside. As a result, an acoustic pressure is improved.

Due to the choice of the parameters of the insert, it is possible to adjust the damping performance to the specific requirements of the electromotive refrigerant compressor. In particular, a thickness of the insert, that is to say in particular a wall thickness, or at least a portion of a wall of the insert, is set to the attenuation and / or reduction of sound waves, at least one specific frequency range. The surface of the insert, for example the surface facing the compressor or the compressor housing, preferably has a specific structure which serves to dampen certain sound waves, in particular a specific frequency range.

Due to the use of the acoustic impression of the electromotive refrigerant compressor (eKMV) is improved, the use of the particular type of vehicle and / or the intended use can be adapted. Here, only an adaptation of the insert is required, and the other components of the electromotive refrigerant compressor need not be changed. As a result, manufacturing costs are reduced, since only the use must be adapted to the particular type of motor vehicle. In addition, a maintenance is improved because for different types of motor vehicles each of the same electromotive refrigerant compressor and possibly adjusted for the particular application must be kept, which reduces storage costs. Because of the insert, thermal insulation is also provided so that excessive heating of the compressor housing is reduced due to the refrigerant heated during operation due to compression.

The term "motor vehicle types" is understood to mean, in particular, a specific series of a motor vehicle whose individual motor vehicles do not differ, for example, with regard to certain equipment features, but in particular with regard to further (main) components. For example, all motor vehicles are assigned to only one year of construction or several (related) years of construction of a particular motor vehicle series.

Suitably, the insert is cup-shaped, wherein the pot opening is closed, for example by means of the compressor or a plate arranged therebetween, which preferably has an opening for the compressor outlet. As a result, assembly of the insert is simplified. Preferably, the high-pressure compartment is also designed cup-shaped. As a result, a mastery of an increased pressure prevailing in the high-pressure compartment is simplified. Suitably, the insert imitates the contour of the high-pressure compartment, wherein the shape of the insert is reduced, for example, compared to the high-pressure compartment. Suitably, during operation by means of the insert, contact of the refrigerant with the high-pressure compartment, that is to say an inner wall of the high-pressure compartment, is prevented. Alternatively or particularly preferably in combination with this, the insert is configured in one piece. As a result, assembly and manufacture of the insert is simplified. Suitably, the cup-shaped insert is used in the cup-shaped designed high-pressure compartment, so that a production time is only slightly extended. For example, the high-pressure compartment and the insert have mutually corresponding features, so that an assembly of the insert is possible only in a single position with respect to the compressor housing.

In particular, the compressor housing is made of an aluminum, so pure aluminum or an aluminum alloy. Suitably, the compressor housing is a die-cast part. As a result, it is also possible to control relatively high pressures by means of the compressor housing, which increases efficiency and cooling capacity of the electromotive refrigerant compressor. Alternatively or particularly preferably in combination, the insert is made of a plastic. In this way, manufacturing costs are reduced. In particular, the use of a plastic injection molding process is created.

Suitably, the high-pressure compartment is provided with the insert. For example, the insert lies substantially over the entire area of the high-pressure compartment. Suitably, a cohesive connection or at least partially cohesive connection between the high pressure compartment, so the inner wall of the compressor housing in this area, and the insert is formed. The insert is, for example, a spread which is expediently pasty or lacquer-like. Alternatively, the insert is a coating. Consequently, the high-pressure compartment is coated with the insert for production. As a result, detachment of the insert from the high-pressure compartment is avoided. Particularly preferably, however, a gap is formed between the insert and the compressor housing, and the insert is in particular a separate part from the compressor housing. As a result, an exchange is simplified. It is also possible to prevent or at least reduce the introduction of vibrations that are absorbed by the insert into the compressor housing.

In particular, the insert on the compressor housing, so in particular an inner wall of the high-pressure compartment, supported. For this purpose, the insert expediently has a number of ribs, suitably between 2 and 10 ribs, between 3 and 8 ribs and, for example, equal to 4, 5 or 6 ribs. The ribs are preferably formed on further components of the insert. In the assembled state, the ribs are supported on the compressor housing, ie in direct mechanical contact with the inner wall of the high-pressure compartment. Suitably, the ribs form the only contact between the insert and the compressor housing. The ribs thus form a local abutment of the insert on the compressor housing, so that a transfer of sound waves from the insert is reduced to the compressor housing. For example, the ribs run parallel to an insertion direction of the insert during assembly. Suitably, the ribs are parallel to an insertion direction of the insert and / or parallel to a hollow cylinder axis, if the insert is pot-shaped and thus has a hollow cylindrical section. Suitably, the ribs extend parallel to the axial direction, that is to say an axial direction, of the electromotive refrigerant compressor. The ribs have in particular the thickness of the gap, so that the insert is used in particular to form a clearance fit in the compressor housing. As a result, assembly is facilitated and relative movement between the insert and the compressor housing is avoided.

For example, the thickness of the gap varies. As a result, it is possible to influence specific sound frequencies by means of the insert. More preferably, however, the thickness of the gap is substantially constant. Thus, a mounting is simplified. In this case too, in particular, a specific frequency range is attenuated comparatively efficiently by means of the insert and the gap thereafter, and / or a specific impedance is provided by means of the insert and the gap.

For example, the high-pressure compartment has an outlet through which the refrigerant is discharged during operation. Preferably, the insert in this case comprises an opening aligned therewith. Consequently, the refrigerant passes through the opening and the outlet substantially unhindered, so that turbulence and concomitant noise are avoided or at least reduced. In particular, an oil separator protrudes through the outlet and through the opening in the high-pressure compartment. In this case, the oil separator is expediently attached to the insert and to the compressor housing. Thus, a passage between the oil separator and the insert is not possible, which further improves a sealing effect. Preferably, the insert has openings only in the areas in which the high-pressure compartment has outlets or the like. Thus, the insert has a comparatively high stability, which increases robustness and simplifies assembly.

In particular, electromotive refrigerant compressor has an electric motor. The electric motor is suitably a synchronous motor, for example a brushless electric motor. Conveniently, in the electric motor is a brushless DC motor (BLDC). Conveniently, the electromotive refrigerant compressor comprises electronics for energizing the electric motor, for example a converter comprising, for example, a bridge circuit, such as a B4 or B6 circuit. Preferably, the electric motor comprises a number of electrical phases, for example two or three such phases. The phases are expediently interconnected to form a star or delta connection and are energized during operation by means of the converter. The electric motor is arranged in a motor housing, which is preferably made of an aluminum. Suitably, the motor housing is a diecast part. The control electronics, in particular the converter, is preferably arranged in an electronics compartment of the electromotive refrigerant compressor, which is connected, for example, in one piece with the motor housing or at least to this.

By means of the electric motor, the compressor is preferably driven. For example, the compressor or at least a part of the compressor is non-rotatably attached to a motor shaft of the electric motor. The compressor housing is preferably connected to the motor housing, for example attached thereto, in particular by means of a number of screws. Thus, the compressor housing is at least partially closed by means of the motor housing, so that leakage of the refrigerant from the compressor housing by means of the motor housing is at least partially prevented. Due to the connection of the compressor housing to the motor housing, a comparatively compact and robust electromotive refrigerant compressor is provided. In addition, a mounting of the electromotive refrigerant compressor is simplified in the motor vehicle, since the electromotive refrigerant compressor can be mounted as a single component. Furthermore, it is possible to select the compressor head and / or arranged in the motor housing electric motor to certain requirements. In other words, a modular electromotive refrigerant compressor is realized, which simplifies manufacturing costs and / or storage.

For example, the insert has a substantially smooth surface, which simplifies manufacture. However, the insert preferably comprises an acoustic element for influencing an acoustic impedance of the electromotive refrigerant compressor and / or a resonance frequency of the insert or of the complete electromotive refrigerant compressor. The element serves as an alternative or in combination for this, in particular the steering of sound waves. The acoustic element is, for example, an edge, a corner, a rib or other stock heel, for example a lip. In particular, the acoustic element only serves to influence the acoustic impedance or other acoustic properties of the electromotive refrigerant compressor and otherwise takes no further functions. In other words, the acoustic properties of the electromotive refrigerant compressor are matched by means of the acoustic element. Suitably, the acoustic element is integrally formed with other constituents of the insert and in particular in one piece with the other constituents of the insert. Thus is simplified a production. Due to the acoustic element, an explicit influencing of the acoustic properties of the electromotive refrigerant compressor is made possible, wherein in the adaptation of the acoustic element no further functions of the electromotive refrigerant compressor must be taken into account and are not affected. As a result, a comparatively simple adjustment of the refrigerant compressor and the use of the respective type of motor vehicle is possible.

The motor vehicle comprises a refrigerant circuit with an (air) condenser, as well as with an evaporator, and with an electromotive refrigerant compressor having a compressor housing with a compressor compartment, within which a compressor is arranged, which opens into a high pressure compartment of the compressor housing. The high-pressure compartment is lined with an insert.

The condenser is fluidly connected between the electromotive refrigerant compressor and the evaporator. Preferably, the refrigerant circuit comprises a further heat exchanger, which is connected between the evaporator and the electromotive refrigerant compressor, and which is preferably thermally contacted with another component of the motor vehicle, such as a blower line of an air conditioner or an energy storage, such as a high-voltage storage. The refrigerant circuit is filled in particular with a refrigerant, for example a chemical refrigerant, such as R134a, R1234yf, or with CO2.

By means of the refrigerant compressor, a pressure of the refrigerant is increased during operation, which is subsequently passed to the condenser, which is preferably in thermal contact with an environment of the motor vehicle. Preferably, by means of the capacitor, a temperature equalization of the refrigerant to the ambient temperature or at least a decrease in the temperature of the refrigerant.

With the downstream evaporator, the refrigerant is expanded, which is why the temperature of the refrigerant is further reduced. In the downstream further heat exchanger is transferred from the thermally contacted with the other heat exchanger component thermal energy to the refrigerant, resulting in a cooling of the component and heating of the refrigerant. The heated refrigerant is preferably supplied again to the refrigerant compressor for closing the refrigerant circuit.

The refinements and advantages described in connection with the electromotive refrigerant compressor are to be transferred analogously to the motor vehicle and vice versa.

• 1 schematisch ein Kraftfahrzeug mit einem elektromotorischen Kältemittelverdichter,
• 2 in einer Schnittdarstellung schematisch vereinfacht den elektromotorischen Kältemittelverdichter mit einem Verdichtergehäuse,
• 3 perspektivisch das Verdichtergehäuse mit einem Hochdruckfach,
• 4 perspektivisch einen Einsatz für das Hochdruckfach, und
• 5, 6 jeweils in einer Schnittdarstellung den in dem Hochdruckfach angeordneten Einsatz.

An embodiment of the invention will be explained in more detail with reference to a drawing. Show:

• 1 schematically a motor vehicle with an electromotive refrigerant compressor,
• 2 in a sectional view schematically simplifies the electromotive refrigerant compressor with a compressor housing,
• 3 in perspective the compressor housing with a high-pressure compartment,
• 4 in perspective, an insert for the high-pressure compartment, and
• 5 . 6 in each case in a sectional view arranged in the high-pressure compartment insert.

Corresponding parts are provided in all figures with the same reference numerals.

In 1 schematically simplified is a motor vehicle 2 with two front wheels 4 and two rear wheels 6 shown. At least two of the wheels 4 . 6 are driven by a main drive, not shown in detail, for example, an internal combustion engine, an electric motor or a combination thereof. The car 2 includes a refrigerant circuit 8th which is part of an air conditioner. The refrigerant circuit 8th is with a refrigerant 10 filled, for example CO2, R1234yf or R134a. By means of an electromotive refrigerant compressor (eKMV) 12, the refrigerant 10 compressed and a fluidic downstream capacitor 14 supplied, which is acted upon by ambient air, resulting in a decrease in the temperature of the refrigerant 10 leads. The pressure and thus the temperature of the refrigerant 10 is by means of a downstream evaporator 16 lowered, comprising a non-illustrated further heat exchanger, which is thermally coupled to a fan line of the air conditioner. The fan line promotes cooled air in an interior of the motor vehicle as a function of a user setting 2 ,

The electromotive refrigerant compressor 12 is by means of a bus system 18 , which is a CAN bus system or a Lin bus system, signaling with a motor vehicle control 20 coupled, such as an on-board computer. By means of a vehicle electrical system 22 which carries the respective electrical voltage, for example 48V, and by means of a battery 24 is fed, the electromotive refrigerant compressor 12 energized. The electrical system 22 further comprises a securing device 26 , by means of which an electric current flow between the battery 24 and the refrigerant compressor 12 can be prevented. For this purpose, the safety device 26 for example, a load and / or circuit breaker. The safety device 26 is by means of the bus system 18 or otherwise signaling technology with the vehicle control 20 connected so that by means of the vehicle control 20 the load or circuit breaker actuated and thus the electric current flow can be prevented.

2 shows schematically simplified the (electromotive) refrigerant compressor 12 in a sectional view along a rotation axis (rotation axis) 28 an electric motor 30 of the refrigerant compressor 12 , The electric motor 30 is a brushless DC motor (BLDC) and has a cylindrical rotor 32 on the circumference by means of a hollow cylindrical stator 34 is surrounded. The rotor 32 is rotationally fixed at a concentric to the axis of rotation 28 arranged wave 36 attached, by means of two non-illustrated bearing in the form of ball bearings rotatable about the axis of rotation 28 is stored.

The electric motor 30 is in a motor housing 38 arranged, which extends along the axis of rotation 28 extends and is designed as a hollow cylinder. At one end of the motor housing 38 is a hollow cylindrical electronics housing aligned and formed by a partition wall 42 which is substantially perpendicular to the axis of rotation 28 is arranged, separated from this. Inside the electronics housing 40 is an electronics 44 arranged with the bus system 18 and the electrical system 22 connected is. The Electronic 44 is via a via 46 , which is pressure tight, with the stator 34 electrically contacted, so that during operation of the stator 34 by means of the electronics 44 is energized. The electronics housing 40 , the motor housing 38 and the partition 42 are made in one piece with each other and made of aluminum in a die-casting process. In other words, the electronics housing 40 , the motor housing 38 and the partition 42 an aluminum die casting. The electronics housing 40 is on the partition 42 opposite sides with a housing cover 48 closed, which made of a metal and by means of screws to the electronics housing 40 is releasably attached.

On the electronics housing 40 opposite side of the motor housing 38 is at this releasably a compressor housing 50 aligned, which is made of an aluminum also in a die-casting process. The compressor housing 50 is designed essentially pot-shaped, wherein the pot opening by means of the motor housing 38 is closed. The compressor housing 50 has a compressor compartment 52 within, within which is a compressor 54 is arranged in the form of a scroll compressor. A part of the scroll compressor, namely one of the scrolls, is rotationally fixed to the shaft 36 of the electric motor 30 attached and thus by means of the electric motor 30 driven. The compressor housing 50 also has a high-pressure compartment 56 on whose inner wall at least partially by means of the pot bottom of the cup-shaped compressor housing 50 is formed. Consequently, the compressor compartment is located 52 between the high pressure compartment 56 and the motor housing 38 ,

A compressor outlet 58 of the compressor 54 flows into the high pressure compartment 56 , the pressure-tight by means of a device not shown in detail from the compressor compartment 52 is separated. The high pressure compartment 56 is with an insert 60 lined, which is made in one piece from a plastic in a plastic injection molding process. Here is between the inner wall of the high-pressure compartment 56 and the mission 60 A gap 62 formed with a constant thickness. In other words, the insert points 60 a substantially constant distance to the compressor housing 50 on, and the use 60 is thus also pot-shaped.

The high pressure compartment 56 has an outlet 64 by means of which the high-pressure compartment 56 with a drain 66 is connected, which has an oil separator, not shown. The use 60 includes an opening 68 , which coincide with the outlet 64 and thus is in alignment with this. The use 60 further comprises an acoustic element 70 in the form of one of the bottom of the pot in the direction of the compressor 54 directed continuation, which affects the acoustic impedance of the connection between the use 60 , the gap 62 and the compressor housing 50 serves. Another function takes the acoustic element 70 not true.

During operation, there is an inlet 72 of the motor housing 38 the refrigerant 10 in the motor housing 38 in the area of the partition 42 directed. Due to the partition 42 in this case is a transfer of the refrigerant 10 in the electronics housing 40 prevented. The refrigerant 10 is along the electric motor 30 to the compressor 54 sucked and compressed there, so that an increase in pressure of the refrigerant 10 he follows. The compressed refrigerant 10 is through the compressor outlet 58 in the high-pressure compartment 56 this being due to the design of the compressor 54 as a scroll compressor intermittently. As a result, the compressed refrigerant is spreading in the air 12 Sound waves, which, however, initially on the use 60 plump. Due to the impedance jump between the insert 60 and the compressor housing 50 , which in particular by means of the gap 62 as well as the special design of the insert 60 as well as its density and the acoustic element 70 is set, there is a reflection of the sound waves on the insert 60 as well as a partial absorption. At least, however The sound waves are not or only to a comparatively small extent, the compressor housing 50 transfer. In addition, the use serves 60 the thermal insulation of the compressor housing 50 in front of the refrigerant 10 , which is heated due to compression. The compressed refrigerant 10 occurs over the opening 68 and the outlet 66 in the process 66 and from there to the capacitor 14 directed.

In 3 is in perspective of the motor housing 38 the cup-shaped compressor housing 50 shown a flange 74 with a total of six holes 76 for receiving screws, by means of which the compressor housing 50 in the assembled state with the motor housing 38 is screwed. The compressor compartment 52 points in comparison to the high-pressure compartment 56 an enlarged diameter, and the high-pressure compartment 56 includes a total of three outlets 64 wherein at least one of them is the return of oil, which is the lubrication of the electric motor 30 serves, to the motor housing 38 serves.

In 4 is in perspective the use 60 shown, which is made in one piece from the plastic and to the outlets 64 corresponding three openings 68 having. Also corresponds to the shape, so in particular the outer contour of the insert 60 to the high pressure compartment 56 , The use 60 has on the outside a total of four parallel to the axis of rotation 28 running ribs 78 on, in the assembled state on an inner wall of the high-pressure compartment 56 are supported, and whose thickness is equal to the thickness of the gap 62 is. This is in the assembled state between the compressor housing 50 and the mission 60 by means of the ribs 78 created a clearance.

In 5 and 6 is in each case in a sectional view along the axis of rotation 28 the compressor housing 50 shown. In at least two of the outlets 64 and the openings 68 is the oil separator 80 used, through which an outlet of the refrigerant 10 and any oil mixed therewith. The compressor outlet 68 is by means of a valve 82 in the form of a 3-finger valve selectively closable, which serves in particular as a check valve.

In summary, the sound waves, which due to the compression of the refrigerant 10 arise on the insert 60 and are partially reflected and absorbed there. Here is the insert 60 and its nature, so its material and its thickness, tuned to a suitable level of reflection, absorption and conduction, whereby the amplitude and the frequency of the sound waves is changed. Thus, by means of the insert 60 realized a multi-layered sound insulation. Alternatively to the design of the insert 60 as a separately manufacturable component, this is, for example, a spread which is lacquer-like or pasty. Alternatively, the insert 60 a coating on the inside of the high-pressure compartment 56 ,

The use 60 is adjustable in terms of impedance modulation. Thus, a sound attenuation for a given frequency is adjustable, with other components of the electromotive refrigerant compressor 12 do not need to be adjusted. So are only by adjusting the use 60 a noise and noise characteristics on special requirements and wishes adjustable.

The use 60 is in the high pressure compartment 56 inserted and thus forms a second wall between the interior and the outer surface of the compressor housing 50 , Thus, a layer structure is realized which serves to reduce noise emissions, due to one by means of the insert 60 and the gap 62 Adjustable impedance jump specific frequency range can be specifically attenuated. The parameters for adjusting the damping effect are the wall thickness and the density, in particular the material, of the insert 60 , Likewise, the acoustic properties due to the dimensions of the gap 62 as well as the surface, ie the structure, the inside and outside of the insert 60 certainly. In addition, the acoustic properties are influenced by means of the acoustic element 70 , which is formed for example by means of an edge, a corner, a rib or the like, and by means of which a targeted influencing of the sound path is made possible.

The invention is not limited to the embodiment described above. Rather, other variants of the invention can be derived therefrom by the person skilled in the art without departing from the subject matter of the invention. In particular, all the individual features described in connection with the exemplary embodiment can also be combined with one another in other ways, without departing from the subject matter of the invention.

LIST OF REFERENCE NUMBERS

2

motor vehicle

4

front

6

rear wheel

8th

Refrigerant circulation

10

refrigerant

12

electromotive refrigerant compressor

14

capacitor

16

Evaporator

18

Bus system

20

Automotive control

22

board network

24

battery

26

safety device

28

axis of rotation

30

electric motor

32

rotor

34

stator

36

wave

38

motor housing

40

electronics housing

42

partition wall

44

electronics

46

via

48

housing cover

50

compressor housing

52

compressor compartment

54

compressor

56

High pressure compartment

58

compressor outlet

60

commitment

62

gap

64

outlet

66

procedure

68

opening

70

acoustic element

72

Intake

74

flange

76

drilling

78

rib

80

oil separator

82

Valve

Claims (10)

An electromotive refrigerant compressor (12) of a motor vehicle (2) having a compressor housing (50) with a compressor compartment (52) within which a compressor (54) is arranged, which opens into a high pressure compartment (56) of the compressor housing (50) the high-pressure compartment (56) is lined with an insert (60). Electromotive refrigerant compressor (12) after Claim 1 , characterized in that the insert (60) cup-shaped and / or is designed in one piece. Electromotive refrigerant compressor (12) after Claim 1 or 2 , characterized in that the compressor housing (50) made of an aluminum and the insert (60) are made of a plastic. Electromotive refrigerant compressor (12) according to one of Claims 1 to 3 , characterized in that between the insert (60) and the compressor housing (50), a gap (62) is formed. Electromotive refrigerant compressor (12) after Claim 4 , characterized in that the insert (60) has a number of ribs (78) which are supported on the compressor housing (50). Electromotive refrigerant compressor (12) after Claim 4 or 5 , characterized in that the gap (62) has a constant thickness. Electromotive refrigerant compressor (12) according to one of Claims 1 to 6 , characterized in that the high-pressure compartment (56) has an outlet (64) and the insert (60) has an opening (68) aligned therewith. Electromotive refrigerant compressor (12) according to one of Claims 1 to 7 , characterized in that the compressor housing (50) is connected to a motor housing (38) within which an electric motor (30) is arranged, by means of which the compressor (54) is driven. Electromotive refrigerant compressor (12) according to one of Claims 1 to 8th , characterized in that the insert (60) comprises an acoustic element (70) for influencing an acoustic impedance. Motor vehicle (2) with a refrigerant circuit (8) having a condenser (14) and an evaporator (16) and an electromotive refrigerant compressor (12) according to one of Claims 1 to 9 includes.

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