JP2011256789A - Inverter-integrated electric compressor and air conditioner equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inverter-integrated electric compressor capable of efficiently cooling an inverter section without increasing a passage cross-sectional area of a refrigerant passage between the inverter section formed integrally with a housing and a refrigerant, and an air conditioner equipped with the same.SOLUTION: The inverter-integrated electric compressor includes: a housing body 2 having in its interior a compression mechanism for compressing the refrigerant, an electric motor 4 for driving the compression mechanism, an inverter section 6 for controlling the electric motor 4, and a plurality of refrigerant passages 5, provided on the outer periphery of the electric motor 4, for flowing the refrigerant which is led along the longitudinal direction of the electric motor 4 to the compression mechanism; and a header section 10 provided at an end in the longitudinal direction of the housing body 2 and having a refrigerant inflow port for leading the refrigerant into the housing body 2. An inlet part 7 of a refrigerant passage 5 provided between the electric motor 4 and the inverter section 6 is tapered toward the downstream side of the refrigerant flowing through the refrigerant passage 5.

Description

  The present invention relates to an inverter-integrated electric compressor and an air conditioner including the same, and more particularly to cooling an inverter formed integrally with a housing.

  In general, many of the air conditioners for electric vehicles use an electric compressor that uses an electric motor as a power source for driving a compression mechanism that compresses and sends out a refrigerant. As this electric compressor, a hermetic electric compressor in which a compression mechanism and an electric motor are coaxially built in a housing is employed. Furthermore, a power supply that supplies electric power input from a power source to an electric motor via an inverter so that the rotational speed of the compression mechanism can be variably controlled in accordance with an air conditioning load is widely used.

  In an electric compressor controlled via an inverter, a control circuit board and the like constituting the inverter are integrally formed on the outer periphery of the housing of the electric compressor. That is, the control circuit board or the like constituting the inverter is housed and installed in the inverter box, and the inverter and the electric compressor are integrated.

  Since the electric motor and the inverter constituting the electric compressor are heating elements, heat is generated when the electric compressor is driven, and thus it is necessary to cool the inverter so that the temperature of the inverter is lower than the allowable temperature. .

  In Patent Document 1 and Patent Document 2, a refrigerant passage through which the refrigerant guided to the compression mechanism passes is provided on the outer periphery of the electric motor, which is a heating element, and the heat transfer amount of the refrigerant is measured via the refrigerant passage between the electric motor and the inverter. It is disclosed that by increasing the heat transfer rate to the inverter, the cooling efficiency of the inverter is improved.

Japanese Patent No. 3818213 JP 2007-162661 A

  However, in the inventions described in Patent Literature 1 and Patent Literature 2, in order to increase the amount of heat transferred from the refrigerant to the inverter, it is necessary to increase the cross-sectional area of the refrigerant passage through which the refrigerant is guided. Therefore, it is necessary to change the size of the housing in which the compression mechanism and the electric motor are accommodated, and there is a problem that the installation position of the electric compressor in the air conditioner is changed.

  The present invention has been made in order to solve the above-described problem, and the effect of the inverter portion is achieved without increasing the cross-sectional area of the refrigerant passage between the inverter portion formed integrally with the housing and the refrigerant. It is an object of the present invention to provide an inverter-integrated electric compressor and an air conditioner including the same.

In order to achieve the above object, the present invention provides the following means.
That is, the inverter-integrated electric compressor of the present invention is provided on the outer periphery of the motor, the compression mechanism that compresses the refrigerant, the electric motor that drives the compression mechanism, the inverter unit that controls the electric motor, and the length of the electric motor. A housing main body having a plurality of refrigerant passages through which the refrigerant guided to the compression mechanism passes along a direction, and a refrigerant flow that is provided at a longitudinal end of the housing main body and guides the refrigerant into the housing main body A header portion having an inlet, and an inlet portion of a refrigerant passage provided between the electric motor and the inverter portion has a tapered shape toward a downstream side of the refrigerant flowing through the refrigerant passage. To do.

  The shape of the inlet portion of the refrigerant passage provided between the inverter unit and the electric motor is a tapered shape that narrows toward the downstream side of the refrigerant flow. Thereby, the contracted flow of the refrigerant in the refrigerant passage provided between the inverter unit and the electric motor can be suppressed, and the passage resistance of the refrigerant passage provided between the inverter unit and the electric motor can be reduced. Therefore, the flow rate of the refrigerant passing through the refrigerant passage provided between the inverter unit and the electric motor can be increased. Therefore, the cooling performance of the inverter unit can be improved without changing the cross-sectional area of the refrigerant passage provided between the inverter unit and the electric motor.

  In the inverter-integrated electric compressor of the present invention, the outlet portion of the refrigerant passage provided between the inverter portion and the electric motor has a shape that widens toward the downstream side of the refrigerant flowing through the refrigerant passage. It is characterized by.

  The shape of the outlet portion of the refrigerant passage provided between the inverter unit and the electric motor is made to be a divergent shape that expands toward the downstream side of the refrigerant flow. Thereby, the discharge dynamic pressure of the refrigerant | coolant in the exit part of the refrigerant path provided between an inverter part and an electric motor can be reduced, and the passage resistance of the refrigerant path provided between an inverter part and an electric motor can be reduced. . Therefore, the flow rate of the refrigerant that passes through the refrigerant passage provided between the inverter unit and the electric motor can be increased. Therefore, the cooling performance of the inverter unit can be improved without changing the cross-sectional area of the refrigerant passage provided between the inverter unit and the electric motor.

  Further, the refrigerant inlet according to the inverter-integrated electric compressor of the present invention is provided obliquely upward so as to face the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor, and the refrigerant flow A part of the header part provided with the inlet protrudes outward in the longitudinal direction of the housing body.

  A part of the header portion provided with the refrigerant inlet is projected outward in the longitudinal direction of the housing body. As a result, the flow direction of the refrigerant flowing from the obliquely upward to the protruding portion of the header portion with respect to the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor is provided between the inverter portion and the electric motor. It can change so that it may go to the entrance part of a refrigerant path. Therefore, the flow rate of the refrigerant guided to the refrigerant passage provided between the inverter unit and the electric motor can be increased by effectively using the inflow dynamic pressure of the refrigerant. Therefore, the cooling performance of the inverter unit can be improved without changing the cross-sectional area of the refrigerant passage provided between the inverter unit and the electric motor.

  In addition, the refrigerant inlet according to the inverter-integrated electric compressor of the present invention is provided obliquely upward so as to face the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor, and the header portion The distance in the longitudinal direction of the housing body from the inlet portion of each refrigerant passage from the refrigerant passage provided between the inverter portion and the electric motor to the refrigerant passage on the opposite side across the electric motor. It is characterized by gradually shortening as it goes.

  The distance in the longitudinal direction of the housing body between the inlet portion and the header portion of each refrigerant passage gradually increases from the refrigerant passage provided between the inverter portion and the electric motor to the refrigerant passage on the opposite side across the electric motor. I decided to shorten it. Thus, the flow rate of the refrigerant guided from the header portion to the inlet portion of each refrigerant passage is changed from the refrigerant passage on the opposite side of the electric motor to the refrigerant passage provided between the inverter portion and the electric motor. It can be delayed toward the refrigerant passage provided between the motor and the motor. Therefore, the flow rate of the refrigerant guided to the refrigerant passage provided between the inverter unit and the electric motor can be increased by changing the dynamic pressure of the refrigerant guided to each refrigerant passage to optimize the static pressure distribution. Therefore, the cooling performance of the inverter unit can be improved without changing the cross-sectional area of the refrigerant passage provided between the inverter unit and the electric motor.

  In addition, the refrigerant inlet according to the inverter-integrated electric compressor of the present invention is provided obliquely upward so as to face the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor, and the header portion And a distance between the inlet portion of each of the refrigerant passages is larger than a distance between the header portion and the electric motor.

  The distance between the header portion and the inlet portion of each refrigerant passage is made larger than the distance between the header portion and the electric motor. That is, the header portion facing the inlet portion of each refrigerant passage projects in the longitudinal direction of the housing body. Accordingly, the refrigerant provided between the inverter unit and the electric motor by effectively using the inflow dynamic pressure of the refrigerant guided between the refrigerant passage and the header between the refrigerant passage provided between the inverter unit and the electric motor from the refrigerant inlet. The refrigerant flow rate of the refrigerant guided to the passage can be increased.

  In addition, since the header portion facing the inlet portion of each refrigerant passage projects in the longitudinal direction of the housing body, the refrigerant that has not been led to the refrigerant passage provided between the inverter portion and the electric motor is moved along the outer peripheral direction of the electric motor. To the inlet of each refrigerant passage. Therefore, the flow rate of the refrigerant guided to the inlet portion of each refrigerant passage can be increased. Therefore, the cooling performance of the inverter unit can be improved, and the cooling performance of the entire inverter-integrated electric compressor can be improved.

  In addition, the refrigerant inlet according to the inverter-integrated electric compressor of the present invention is provided obliquely upward so as to face the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor, and the header portion And a refrigerant passage section guide that divides the refrigerant in the longitudinal direction of the housing body at a position opposite to the inlet portion between the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor. Is provided.

  The housing main body is located between the header portion and the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor and facing the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor. The refrigerant passage section guide for dividing the refrigerant in the longitudinal direction is provided. Thereby, a part of the divided refrigerant can be positively guided to the inlet portion of the refrigerant passage provided between the inverter unit and the electric motor. Therefore, the flow rate of the refrigerant guided to the refrigerant passage provided between the inverter unit and the electric motor can be increased. Therefore, the cooling performance of the inverter unit can be improved without changing the cross-sectional area of the refrigerant passage provided between the inverter unit and the electric motor.

  In addition, the refrigerant inlet according to the inverter-integrated electric compressor of the present invention is provided obliquely upward so as to face the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor, and the header portion And a portion of the refrigerant flow between the inverter portion and the motor between the inlet portion and the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor. A refrigerant flow turning guide is provided which turns to the inlet portion of the refrigerant passage provided in the refrigerant passage.

  Between the header portion and the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor, the refrigerant flow is located at a position facing the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor. The refrigerant flow turning guide is provided to turn the portion to the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor. Thereby, the refrigerant path provided between the inverter part and the electric motor by utilizing the inflow dynamic pressure of the refrigerant introduced between the inlet part and the header part of the refrigerant path provided between the inverter part and the electric motor. It is possible to increase the flow rate of the refrigerant led to Therefore, the cooling performance of the inverter unit can be improved without changing the cross-sectional area of the refrigerant passage provided between the inverter unit and the electric motor.

  Moreover, the air conditioning apparatus which concerns on this invention is provided with the inverter integrated electric compressor in any one of said.

  An inverter-integrated electric compressor capable of improving the cooling performance of the inverter unit without changing the cross-sectional area of the refrigerant passage provided between the inverter unit and the electric motor is provided. Therefore, the cooling performance can be improved without greatly changing the overall dimensions of the inverter-integrated electric compressor from the conventional dimensions. Therefore, it can be used as it is without changing the arrangement of the inverter-integrated electric compressor in the conventional air conditioner.

  The shape of the inlet portion of the refrigerant passage provided between the inverter unit and the electric motor is a tapered shape that narrows toward the downstream side of the refrigerant flow. Thereby, the contracted flow of the refrigerant in the refrigerant passage provided between the inverter unit and the electric motor can be suppressed, and the passage resistance of the refrigerant passage provided between the inverter unit and the electric motor can be reduced. Therefore, the flow rate of the refrigerant passing through the refrigerant passage provided between the inverter unit and the electric motor can be increased. Therefore, the cooling performance of the inverter unit can be improved without changing the cross-sectional area of the refrigerant passage provided between the inverter unit and the electric motor.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the inverter integrated electric compressor which concerns on 1st Embodiment of this invention, Comprising: (A) is the cross-sectional view, (B) is a longitudinal section in the aa part of (A). FIG. It is a schematic block diagram of the inverter integrated electric compressor which concerns on 2nd Embodiment of this invention, Comprising: (A) is the cross-sectional view, (B) is a longitudinal section in the bb part of (A). FIG. It is a schematic block diagram of the inverter integrated electric compressor which concerns on 3rd Embodiment of this invention, Comprising: (A) is the cross-sectional view, (B) is a longitudinal section in the cc part of (A). FIG. It is a schematic block diagram of the inverter integrated electric compressor which concerns on 4th Embodiment of this invention, Comprising: (A) is the cross-sectional view, (B) is a longitudinal section in the dd part of (A). FIG. It is a modification of the inverter integrated electric compressor which concerns on 4th Embodiment of this invention, Comprising: (A) is the cross-sectional view, (B) is the longitudinal cross-section in the ee part of (A). FIG. It is a schematic block diagram of the inverter integrated electric compressor which concerns on 5th Embodiment of this invention, Comprising: (A) is the cross-sectional view, (B) is a longitudinal section in the ff part of (A). FIG. It is a modification of the inverter integrated electric compressor which concerns on 5th Embodiment of this invention, Comprising: (A) is the cross-sectional view, (B) is the longitudinal cross-section in the gg part of (A). FIG. It is a schematic block diagram of the inverter integrated electric compressor which concerns on 6th Embodiment of this invention, (A) is the cross-sectional view, (B) is a longitudinal section in the hh part of (A). FIG. It is a modification of the inverter integrated electric compressor which concerns on 6th Embodiment of this invention, Comprising: (A) is the cross-sectional view, (B) is the longitudinal cross-section in the ii part of (A). FIG.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of an inverter-integrated electric compressor according to a first embodiment of the present invention, in which (A) is a cross-sectional view thereof, and (B) is a- It is a longitudinal cross-sectional view in a part a.

  The air conditioner (not shown) includes an electric compressor 1 that sucks, compresses, and discharges a refrigerant. The electric compressor 1 includes an inverter 1 in which a housing body 2 contains a compression mechanism (not shown) that compresses a refrigerant, an electric motor 4 that drives the compression mechanism, and an inverter unit 6 that controls the electric motor 4. This is a body-type electric compressor 1.

  A housing main body 2 forming an outer shell of the electric compressor 1 extends in the axial direction of the electric motor 4 and the compression mechanism accommodated therein, and has a substantially cylindrical shape. In the housing main body 2, an electric motor side housing main body 2a in which the electric motor 4 is accommodated and a compression mechanism side housing main body (not shown) in which the compression mechanism is accommodated are fastened by a plurality of bolts (not shown). Yes. An inverter box 2b in which the inverter unit 6 is accommodated is integrally formed on the upper part of the motor-side housing body 2a.

  A refrigerant inlet (not shown) for introducing a refrigerant into the housing main body 2 is provided at an end in the longitudinal direction of the electric motor side housing main body 2a (the left end of the electric motor side housing main body 2a in FIG. 1B). A header portion 10 is provided. A refrigerant collecting portion 2c that guides the refrigerant introduced into the motor side housing body 2a from the motor side housing body 2a to the compression mechanism side housing body is provided between the motor side housing body 2a and the compression mechanism side housing body. Is provided.

  The electric motor side housing body 2a is provided with an electric motor 4 therein. A drive shaft (not shown) penetrating the refrigerant assembly portion 2c is connected to the electric motor 4 provided in the electric motor side housing body 2a. The electric motor 4 is rotationally driven by electric power supplied from an inverter unit 6 described later. The rotationally driven electric motor 4 rotationally drives a compression mechanism connected to the opposite end of the drive shaft.

  The electric motor 4 includes an annular stator (not shown) supported by an inner wall in the longitudinal direction of the motor side housing body 2a, and a cylindrical rotor penetrating the center of the stator in the longitudinal direction of the motor side housing body 2a. (Not shown). The rotor is rotatable by the drive shaft described above. In the electric motor 4, when electric power is supplied from the inverter unit 6, a rotating magnetic field is formed in the stator and the rotor rotates.

  The compression mechanism side housing body is provided with a compression mechanism therein. The compression mechanism sucks and compresses the refrigerant introduced into the motor-side housing body 2a and discharges the compressed refrigerant. For example, a known scroll type is used as the compression mechanism. In the compression mechanism, a drive shaft connected to the electric motor 4 extends to the compression mechanism side to drive a turning scroll (not shown) of the compression mechanism. The compression mechanism can continuously change the refrigerant discharge capacity in the range of 0 to 100% in accordance with the rotational speed of the electric motor 4.

  The header 10 provided at the end of the electric motor side housing body 2a is provided with a refrigerant inflow port. The header portion 10 is separated from an inlet portion 7 of a plurality of refrigerant passages 5 to be described later by a predetermined distance in the longitudinal direction of the motor side housing body 2a, and is orthogonal to the longitudinal direction of the motor side housing body 2a. 2a is provided at the end.

  The refrigerant led out from the plurality of refrigerant passages 5 is collected in the refrigerant collecting portion 2c provided between the electric motor 4 and the compression mechanism. The refrigerant collected in the refrigerant assembly part 2c is sucked and compressed by the compression mechanism when the compression mechanism is driven.

  The inverter unit 6 includes inverter elements that are various electric circuit elements. The inverter unit 6 forms a part of the motor-side housing body 2 a and is installed in an inverter box 2 b provided above the motor 4.

  A plurality of refrigerant passages 5 through which the refrigerant guided to the compression mechanism passes along the longitudinal direction of the electric motor 4 are provided on the outer periphery of the electric motor 4. As shown in FIG. 1A, the refrigerant passages 5 are provided substantially evenly in the outer peripheral direction of the electric motor 4. The refrigerant passage 5 includes an inlet portion 7 (see FIG. 1B) for introducing the refrigerant into the inside thereof, and an outlet portion 8 for guiding the refrigerant introduced into the refrigerant passage 5 from the inside to the outside. .

  Each refrigerant passage 5 has a substantially elliptical shape in which a cross-sectional shape orthogonal to the extending direction has a long axis in the outer peripheral direction of the electric motor 4. The inlet portion 7 of each refrigerant passage 5 is provided so as to open facing the header portion 10. Further, the outlet portion 8 of each refrigerant passage 5 is provided so as to open facing the refrigerant assembly portion 2c. Each refrigerant passage 5 has the same cross-sectional shape from the inlet portion 7 to the outlet portion 8 except for an inverter-side refrigerant passage 5a described later.

  Among the plurality of refrigerant passages 5 provided in the outer peripheral direction of the electric motor 4, a refrigerant passage (hereinafter referred to as “inverter-side refrigerant passage”) 5 a provided between the inverter unit 6 and the electric motor 4 is an inlet thereof. The portion 7a has a bell mouth shape (tapered shape) that narrows toward the downstream side of the refrigerant flowing in the inverter-side refrigerant passage 5a (direction toward the refrigerant assembly portion 2c). Furthermore, the outlet 8a of the inverter-side refrigerant passage 5a has a diffuser shape (a divergent shape) that expands toward the downstream side of the refrigerant flowing in the inverter-side refrigerant passage 5a (the direction toward the refrigerant assembly portion 2c). Yes.

Next, the flow of the refrigerant in the electric compressor 1 will be described.
A refrigerant is introduced into a motor-side housing main body 2 a constituting the housing main body 2 from a refrigerant inlet provided in the header portion 10. The refrigerant introduced into the motor-side housing body 2a is sucked and guided to each refrigerant passage 5 by driving the compression mechanism. The refrigerant guided to each refrigerant passage 5 passes through each refrigerant passage 5 from each inlet portion 7 and is led out from each outlet portion 8.

  The refrigerant derived from the outlet portion 8 of each refrigerant passage 5 is collected in the refrigerant assembly portion 2c. The refrigerant collected in the refrigerant collecting part 2c is sucked by the compression mechanism. The refrigerant sucked by the compression mechanism is compressed and led out to the outside of the electric compressor 1 from a refrigerant outlet (not shown) provided in the compressor-side housing body.

Next, cooling of the inverter unit 6 and the electric motor 4 will be described.
In order to drive the compression mechanism, electric power is supplied from the inverter unit 6 to the electric motor 4. When electric power is supplied to the electric motor 4, a rotating magnetic field is formed in the stator constituting the electric motor 4, thereby rotating the rotor. As the rotor rotates, the drive shaft connected to the rotor rotates to drive the compression mechanism. At this time, the inverter unit 6 generates heat by supplying electric power to the electric motor 4. In addition, the electric motor 4 generates heat from the stator and the rotor when driven.

  Thus, the heat generated in the electric motor 4 is cooled by the heat transfer of the refrigerant passing through the refrigerant passage 5 provided on the outer periphery of the electric motor 4. Further, the heat generated in the inverter unit 6 is cooled by the heat transfer of the refrigerant passing through the inverter side refrigerant passage 5a.

  Here, since the inlet portion 7a of the inverter-side refrigerant passage 5a has a bell mouth shape, the refrigerant is introduced into the inverter-side refrigerant passage 5a as compared with the refrigerant introduced to each refrigerant passage 5 other than the inverter-side refrigerant passage 5a. It is possible to suppress contraction of the refrigerant flow. Since the contraction of the refrigerant flow in the inverter-side refrigerant passage 5a can be suppressed, the passage resistance of the inverter-side refrigerant passage 5a can be reduced.

  Furthermore, since the inverter-side refrigerant passage 5a has a diffuser shape at the outlet portion 8a, the speed component of the refrigerant is decelerated as it passes through the outlet portion 8a, and refrigerant collects from the outlet portion 8a of the inverter-side refrigerant passage 5a. The discharge dynamic pressure of the refrigerant flow led out to the portion 2c can be reduced. Therefore, the passage resistance of the inverter side refrigerant passage 5a can be further reduced.

  Thus, by reducing the passage resistance of the inverter-side refrigerant passage 5a, the refrigerant flowing in the inverter-side refrigerant passage 5a has a flow rate (compared to the refrigerant flowing in each refrigerant passage 5 other than the inverter-side refrigerant passage 5a). Refrigerant flow rate) increases. As the flow rate of the refrigerant flowing through the inverter-side refrigerant passage 5a increases, the heat capacity of the refrigerant in the inverter-side refrigerant passage 5a increases.

  By increasing the heat capacity of the refrigerant in the inverter-side refrigerant passage 5a, the temperature rise of the refrigerant passing through the inverter-side refrigerant passage 5a can be reduced. Thereby, the temperature difference between the heat conducted from the inverter unit 6 and the refrigerant in the inverter-side refrigerant passage 5a increases. Therefore, the amount of heat transferred from the refrigerant flowing in the inverter-side refrigerant passage 5a to the inverter unit 6 increases. Therefore, the inverter unit 6 can be efficiently cooled without increasing the passage cross-sectional area of the inverter-side refrigerant passage 5a.

As described above, the inverter-integrated electric compressor according to the present embodiment and the air conditioner including the same have the following effects.
The shape of the inlet portion 7a of the inverter side cooling passage (refrigerant passage 5 provided between the inverter section 6 and the electric motor 4) 5a is changed to the downstream side of the refrigerant flow in the inverter side cooling passage 5a (to the refrigerant assembly portion 2c). It was decided to make the bell mouth shape (tapered shape) narrowing toward the direction. Thereby, the contraction of the refrigerant in the inverter side cooling passage 5a can be suppressed, and the passage resistance of the inverter side cooling passage 5a can be reduced. Therefore, the flow rate of the refrigerant passing through the inverter side cooling passage 5a can be increased. Therefore, the cooling performance of the inverter unit 6 can be improved without changing the passage cross-sectional area of the inverter-side cooling passage 5a.

  The shape of the outlet portion 8a of the inverter side cooling passage 5a is changed to a diffuser shape (a diverging shape) that expands toward the downstream side of the refrigerant flow in the inverter side cooling passage 5a (the direction toward the refrigerant collecting portion 2c). did. Thereby, the discharge dynamic pressure of the refrigerant | coolant in the exit part 8a of the inverter side cooling passage 5a can be reduced, and the passage resistance of the inverter side cooling passage 5a can be reduced. Therefore, the flow rate of the refrigerant passing through the inverter side cooling passage 5a can be increased. Therefore, the cooling performance of the inverter unit 6 can be improved without changing the passage cross-sectional area of the inverter-side cooling passage 5a.

  The inverter-integrated electric compressor 1 capable of improving the cooling performance of the inverter unit 6 without changing the passage cross-sectional area of the inverter-side cooling passage 5a is provided. Therefore, the cooling performance can be improved without greatly changing the overall dimensions of the inverter-integrated electric compressor 1 from the conventional dimensions. Therefore, the inverter-integrated electric compressor 1 in the conventional air conditioner can be used as it is without changing the arrangement.

  In the present embodiment, the shape of the inlet portion 7a of the inverter-side refrigerant passage 5a has been described as a bell mouth shape, but the present invention is not limited to this, and the outer wall of the inlet portion 7a of the inverter-side refrigerant passage 5a. It may be chamfered from the wall to the inner wall.

[Second Embodiment]
The inverter-integrated electric compressor of this embodiment and the air conditioner including the same are different from those of the first embodiment in that a part of the header portion protrudes outward in the longitudinal direction of the motor-side housing body. Is the same. Accordingly, the same configuration and flow are denoted by the same reference numerals and description thereof is omitted.
FIG. 2 shows a schematic configuration diagram of an inverter-integrated electric compressor according to the present embodiment, in which (A) is a cross-sectional view thereof, and (B) is a line bb of (A). It is a longitudinal cross-sectional view in a part.

  The header portion 11 has a protruding portion 11 a that partially protrudes outward in the longitudinal direction of the motor-side housing main body 2 a constituting the housing main body 2. The protruding portion 11 a is provided at a position facing the inlet portion 7 a of the inverter side refrigerant passage (the refrigerant passage 5 provided between the inverter portion 6 and the electric motor 4) 5 a of the header portion 11. The longitudinal direction of the protruding portion 11a is provided in parallel to the longitudinal direction of the electric motor side housing body 2a. The cross-sectional shape orthogonal to the longitudinal direction of the motor-side housing body 2a of the projecting portion 11a is a substantially elliptical shape having a long axis in the outer peripheral direction of the motor 4, as shown in FIG. A refrigerant inlet 9 is provided on the end face of the protruding portion 11a.

  As shown by the arrow in FIG. 2 (B), the refrigerant is introduced into the protruding portion (protruding portion) 11a from the refrigerant inlet 9 as a flow obliquely upward to the left. Since the projecting portion 11a is provided so as to project in the longitudinal direction of the electric motor side housing body 2a, the refrigerant flow from the upper left oblique direction introduced into the projecting portion 11a is in the longitudinal direction of the electric motor side housing body 2a. It can be changed to be parallel.

  Here, since the protruding portion 11a is provided so as to face the inlet portion 7a of the inverter side cooling passage 5a, most of the refrigerant derived from the protruding portion 11a has an inlet portion 7a of the inverter side cooling passage 5a. Thus, most of the inflow dynamic pressure of the refrigerant introduced from the refrigerant inlet 9 can be directly used in the inverter-side cooling passage 5a. Therefore, the static pressure of the inlet portion 7a of the inverter side cooling passage 5a can be made higher than that of the refrigerant passage 5 other than the inverter side cooling passage 5a. Therefore, the passage resistance of the inverter side cooling passage 5a can be suppressed, and the flow rate of the refrigerant guided into the inverter side cooling passage 5a can be increased.

  The refrigerant that has not been led from the refrigerant inlet 9 to the inverter-side cooling passage 5a through the protruding portion 11a is led between the header portion 11 and the inlet portion 7 of each refrigerant flow path 5, and each refrigerant flow path 5. Led to.

As described above, the inverter-integrated electric compressor according to the present embodiment and the air conditioner including the same have the following effects.
A part of the header portion 11 provided with the refrigerant inlet 9 is protruded to the outside in the longitudinal direction of the motor-side housing main body 2a constituting the housing main body 2. Thereby, the protrusion part (protruded) provided in the header part 11 from diagonally upward with respect to the inlet part 7a of the inverter side refrigerant path (refrigerant path 5 provided between the inverter part 6 and the electric motor 4) 5a. (Part) The flow direction of the refrigerant flowing into 11a can be changed so as to be directed toward the inlet 7a of the inverter-side refrigerant passage 5a. Therefore, the flow rate of the refrigerant guided to the inverter-side refrigerant passage 5a can be increased by effectively using the inflow dynamic pressure of the refrigerant. Therefore, the cooling performance of the inverter unit 6 can be improved without changing the passage cross-sectional area of the inverter-side refrigerant passage 5a.

[Third Embodiment]
In the inverter-integrated electric compressor of this embodiment and the air conditioner including the same, the distance between the header portion and the refrigerant passage is the refrigerant on the opposite side across the electric motor from the inverter-side cooling passage to the inverter-side cooling passage. It is different from the first embodiment in that it approaches toward the passage, and the others are the same. Accordingly, the same configuration and flow are denoted by the same reference numerals and description thereof is omitted.
FIG. 3 shows a schematic configuration diagram of an inverter-integrated electric compressor according to the present embodiment. FIG. 3A is a cross-sectional view thereof, and FIG. 3B is a cross-sectional view of FIG. It is a longitudinal cross-sectional view in a part.

  The distance between the header portion 12 (shown by the solid line in FIG. 3A) and each refrigerant passage 5 is from the inverter side cooling passage (refrigerant passage 5 provided between the inverter portion 6 and the electric motor 4) 5a. With respect to the inverter side cooling passage 5a, the electric motor 4 is sandwiched and the refrigerant passage (hereinafter referred to as “non-inverter side cooling passage”) 5b is gradually shortened toward the opposite side. The header portion 12 is a flat plate that is inclined so as to approach the inlet portion 7 of each refrigerant passage 5 from the inverter-side cooling passage 5a toward the non-inverter-side cooling passage 5b.

  A refrigerant inlet 9 is provided in the header 12 at a position facing the inlet 7a of the inverter-side cooling passage 5a. The refrigerant inlet 9 is provided obliquely upward so as to face the inlet 7a of the inverter side cooling passage 5a. The refrigerant inflow port 9 has an elbow shape in which a depression is gently formed below.

  The refrigerant introduced into the motor-side housing body 2a constituting the housing body 2 from the refrigerant inlet 9 is provided in the header portion 12 with the refrigerant inlet 9 in an elbow shape. When introduced between the inlet portions 7 of the refrigerant passages 5, the flow direction is the longitudinal direction of the motor-side housing body 2a. Since a part of the refrigerant whose flow direction is the longitudinal direction of the motor-side housing body 2a is provided so that the refrigerant inlet 9 faces the inlet 7a of the inverter-side cooling passage 5a, the inverter-side cooling passage 5a. To the inlet 7a.

  The refrigerant that has not been led to the inlet portion 7 a of the inverter-side cooling passage 5 a is led between the motor-side housing body 2 a and the inlet portion 7 of the other refrigerant passage 5. As the distance between the motor-side housing body 2a and the inlet portion 7 of the refrigerant passage 5 becomes shorter, the flow rate of the refrigerant at the inlet portion 7 of each refrigerant passage 5 increases. The speed of the refrigerant at the inlet portion 7 of each refrigerant passage 5 increases, and the dynamic pressure of the refrigerant at each inlet portion 7 also increases. Therefore, the passage resistance of each refrigerant passage 5 increases from the inverter side cooling passage 5a toward the anti-inverter side cooling passage 5b, and accordingly, the refrigerant flow rate passing through the refrigerant passage 5 is increased from the inverter side cooling passage 5a to the anti-inverter. It decreases as it goes to the side cooling passage 5b.

  That is, the static pressure at the inlet 7 of each refrigerant passage 5 increases as it goes from the non-inverter side cooling passage 5b to the inverter side cooling passage 5a. Therefore, the static pressure at the inlet portion 7 a of the inverter-side cooling passage 5 a can be increased as compared with the inlet portions 7 of the other refrigerant passages 5. Thereby, the passage resistance of the inverter side cooling passage 5a can be reduced, and the flow rate of the refrigerant passing through the inverter side cooling passage 5a can be increased.

  Thus, the flow direction is changed by the refrigerant inlet 9 so as to face the inlet portion 7a of the refrigerant inverter side cooling passage 5a, and the distance between the header portion 12 and the inlet portion 7 of the refrigerant passage 5 is shortened. Thus, the flow rate of the refrigerant guided to the inverter side cooling passage 5a can be increased.

As described above, the inverter-integrated electric compressor according to the present embodiment and the air conditioner including the same have the following effects.
The distance between the inlet portion 7 and the header portion 12 of each refrigerant passage 5 is from the inverter-side refrigerant passage (refrigerant passage 5 provided between the inverter portion 6 and the electric motor 4) 5a to the anti-inverter-side refrigerant passage. (Refrigerant passage 5 on the opposite side of the electric motor 4 with respect to the inverter-side refrigerant passage 5a) 5b was gradually shortened toward 5b. Thereby, the flow velocity of the refrigerant | coolant guide | induced to the inlet part 7 of each refrigerant path 5 from the header part 12 can be slowed toward the inverter side refrigerant path 5a from the non-inverter side refrigerant path 5b. Therefore, the flow rate of the refrigerant guided to the inverter-side refrigerant passage 5a can be increased by changing the dynamic pressure of the refrigerant guided to each refrigerant passage 5 to optimize the static pressure distribution. Therefore, the cooling performance of the inverter unit 6 can be improved without changing the passage cross-sectional area of the inverter-side refrigerant passage 5a.

  In the present embodiment, the header portion 12 is described as a flat plate that is inclined from the inverter-side refrigerant passage 5a toward the anti-inverter refrigerant passage 5b. However, the present invention is not limited to this. However, as shown by a broken line in FIG. 3B, the motor side housing body 2a is a curved line that is gently depressed in the inner direction, or as shown by a two-dot chain line in FIG. 3B. It may be a curve that gently protrudes toward the outside of the main body 2a.

[Fourth Embodiment]
The inverter-integrated electric compressor of this embodiment and the air conditioner equipped with the inverter are first in that a refrigerant passage section guide is provided between the header portion and the inlet portion of the inverter-side refrigerant passage. The other differences are the same as in the embodiment. Accordingly, the same configuration and flow are denoted by the same reference numerals and description thereof is omitted.
FIG. 4 shows a schematic configuration diagram of an inverter-integrated electric compressor according to the present embodiment, in which (A) is a cross-sectional view thereof, and (B) is a d-d line in (A). It is a longitudinal cross-sectional view in a part.

  The housing body 2 is configured from the refrigerant inlet 9 between the header portion 13 and the inverter side refrigerant passage (refrigerant passage 5 provided between the inverter portion 6 and the electric motor 4) 5a. A refrigerant passage section guide 14 is provided for dividing the refrigerant guided into the motor-side housing body 2a in the longitudinal direction of the motor-side housing body 2a.

  As shown in FIG. 4A, the refrigerant passage section guide 14 is provided so as to be positioned at the center of the elliptical shape of the cross section of the inverter-side refrigerant passage 5a. The refrigerant passage section guide 14 is a rectangular flat plate having approximately the same width as the long axis of the substantially elliptical shape of the cross section of the inverter side refrigerant passage 5a.

  As shown by the arrow in FIG. 4B, the refrigerant guided between the refrigerant inlet 9 and the header portion 13 and the inlet portion 7 of each refrigerant passage 5 is divided into two by the refrigerant passage section guide 14. Divided. Among the divided refrigerants, the refrigerant that passes above the refrigerant passage section guide 14 is made into a refrigerant flow parallel to the longitudinal direction of the motor-side housing body 2a and is guided to the inlet 7a of the inverter-side cooling passage 5a. . Thereby, a part of the refrigerant introduced from the refrigerant inlet 9 can be actively guided to the inverter side cooling passage 5a. Therefore, the flow rate of the refrigerant guided to the inverter side cooling passage 5a can be increased.

  On the other hand, among the divided refrigerants, the refrigerant led to the lower side of the refrigerant passage section guide 14 is led to the inlet portion 7 of each refrigerant passage 5 other than the inverter side refrigerant passage 5a.

As described above, the inverter-integrated electric compressor according to the present embodiment and the air conditioner including the same have the following effects.
Between the header portion 13 and the inlet portion 7a of the inverter side refrigerant passage (refrigerant passage 5 provided between the inverter portion 6 and the electric motor 4) 5a, facing the inlet portion 7a of the inverter side refrigerant passage 5a. In this position, the refrigerant passage section guide 14 for dividing the refrigerant in the longitudinal direction of the motor side housing body 2a constituting the housing body 2 is provided. Thereby, a part of divided | segmented refrigerant | coolant can be actively guide | induced to the inlet part 7a of the inverter side refrigerant path 5a. Therefore, the flow rate of the refrigerant guided to the inverter side refrigerant passage 5a can be increased. Therefore, the cooling performance of the inverter unit 6 can be improved without changing the passage cross-sectional area of the inverter-side refrigerant passage 5a.

In the present embodiment, the refrigerant passage section guide 14 has been described as a flat plate. However, the present embodiment is not limited to this, and as illustrated in FIG. 5, a U-shape that gently protrudes downward is used. Also good.
FIG. 5 shows a modification of the inverter-integrated electric compressor according to the present embodiment, where (A) is a cross-sectional view thereof, and (B) is an ee portion of (A). FIG.

  As shown in FIG. 5A, the refrigerant passage section guide 15 is a U-shaped plate that is curved so as to gently protrude downward. The refrigerant passage section guide 15 is provided so that the U-shaped most protruding portion is substantially the center of the cross section of the inverter-side refrigerant passage 5a.

  By making the refrigerant passage section guide 15 U-shaped, more refrigerant can be guided to the upper side of the refrigerant path section guide 15 than when a flat plate is used. Therefore, more refrigerant can be led to the inlet 7a of the inverter side refrigerant passage 5a, and the flow rate of the refrigerant led to the inverter side refrigerant passage 5a can be increased.

  The refrigerant passage section guide is not limited to this embodiment or the present modification, and may be a porous member. Further, the installation position and dimensions of the refrigerant passage section guide are not limited to the present embodiment or the present modification, and may be changed depending on the flow rate of the refrigerant led to the inverter side refrigerant passage 5a.

[Fifth Embodiment]
The inverter-integrated electric compressor of this embodiment and the air conditioner including the same are the first implementation in that a refrigerant flow turning guide is provided between the header portion and the inlet portion of the inverter-side refrigerant passage. It is different from the form and the others are the same. Accordingly, the same configuration and flow are denoted by the same reference numerals and description thereof is omitted.
FIG. 6 shows a schematic cross-sectional configuration diagram of an inverter-integrated electric compressor according to the present embodiment. FIG. 6A is a cross-sectional view thereof, and FIG. It is a longitudinal cross-sectional view in f part.

  The housing body 2 is configured from the refrigerant inlet 9 between the header portion 13 and the inverter side refrigerant passage (refrigerant passage 5 provided between the inverter portion 6 and the electric motor 4) 5a. There is provided a refrigerant flow diverting guide 16 for diverting a part of the refrigerant flow introduced into the motor-side housing main body 2a to the inlet portion 7a of the inverter-side refrigerant passage 5a.

  As shown in FIG. 6 (A), the refrigerant flow turning guide 16 is provided so as to be positioned at the center portion of a substantially oval shape in the cross section of the inverter side refrigerant passage 5a. The refrigerant flow diverting guide 16 is a rectangular plate having approximately the same width as the major axis of the substantially elliptical shape of the cross section of the inverter-side refrigerant passage 5a.

  In addition, as shown in FIG. 6B, the refrigerant flow turning guide 16 has one end on the refrigerant inlet 9 side inclined gently upward. This inclination is shaped such that the bending loss of the refrigerant flowing along the upper part of the refrigerant flow turning guide 16 can be minimized when the flow direction is turned by the refrigerant flow turning guide 16. .

  The refrigerant introduced from the refrigerant inlet 9 between the header portion 13 and the inlet portion 7 of each refrigerant passage 5 is a refrigerant flow provided between the header portion 13 and the inlet portion 7a of the inverter refrigerant passage 5a. The turning guide 16 divides it into two as shown by the arrow in FIG. When the refrigerant passing above the refrigerant flow turning guide 16 is divided by the refrigerant flow turning guide 16, it flows along the refrigerant flow turning guide 16 to the inlet 7a of the inverter side refrigerant passage 5a. The flow direction is turned so as to go to.

The flow direction is changed and the refrigerant is guided to the inlet portion 7a of the inverter-side refrigerant passage 5a. In this way, the flow direction is changed so that a part of the refrigerant introduced from the refrigerant inlet 9 can be guided along the upper side of the refrigerant flow diverting guide 16 to the inlet 7a of the inverter side cooling passage 5a. This makes it possible to efficiently collect the refrigerant inflow dynamic pressure in the inverter-side cooling passage 5a.
On the other hand, the refrigerant led to the lower side of the refrigerant flow turning guide 16 in the divided refrigerant flow is led to the inlet portion 7 of each refrigerant passage 5 other than the inverter-side refrigerant passage 5a.

  In this way, by introducing the refrigerant that can effectively use the inflow dynamic pressure to the inverter-side cooling passage 5a, the inlet of the inverter-side cooling passage 5a compared to the refrigerant passage 5 other than the inverter-side cooling passage 5a. The static pressure of the part 7a can be increased. Therefore, it is possible to suppress the passage resistance of the inverter side cooling passage 5a and increase the flow rate of the refrigerant guided into the inverter side cooling passage 5a.

As described above, the inverter-integrated electric compressor according to the present embodiment and the air conditioner including the same have the following effects.
Between the header part 13 and the inlet part 7a of the inverter side refrigerant path (refrigerant path 5 provided between the inverter part 6 and the electric motor 4) 5a, it opposes the inlet part 7a of the inverter side refrigerant path 5a. The refrigerant flow diverting guide 16 for diverting a part of the refrigerant flow to the inlet 7a of the inverter side refrigerant passage 5a is provided at the position where the refrigerant flows. Thereby, the refrigerant | coolant flow volume guide | induced to the inverter side refrigerant path 5a can be increased using the inflow dynamic pressure of the refrigerant | coolant guide | induced between the inlet part 7a and the header part 13 of the inverter side refrigerant path 5a. . Therefore, the cooling performance of the inverter unit 6 can be improved without changing the passage cross-sectional area of the inverter-side refrigerant passage 5a.

In the present embodiment, the refrigerant flow turning guide 16 has been described as a plate shape that is gently inclined toward the refrigerant inlet 9 side, but the present invention is not limited to this, and FIG. As shown, it may be U-shaped that gently protrudes downward.
FIG. 7 shows a modification of the inverter-integrated electric compressor according to the present embodiment, where (A) is a cross-sectional view thereof, and (B) is a gg portion of (A). FIG.

  As shown in FIG. 7A, the refrigerant flow turning guide 17 has a U shape that is curved so as to protrude gently downward. The refrigerant flow diverting guide 17 is provided so that the U-shaped most protruding portion is the center of the cross section of the inverter-side refrigerant passage 5a.

  The refrigerant flow turning guide 17 is inclined so that one side of the refrigerant inlet 9 side approaches the inlet portion 7a of the inverter-side refrigerant passage 5a from the upper side to the lower side. With this inclination, a part of the refrigerant can be guided to the refrigerant flow diverting guide 17 while suppressing the bending loss of the refrigerant introduced from the refrigerant inlet 9.

  The header 12 provided with the refrigerant inlet 9 has a distance between the header 12 and the inlet 7 of each refrigerant passage 5 from the inverter-side refrigerant passage 5a to the counter-inverter-side refrigerant passage (the electric motor with respect to the inverter-side refrigerant passage 5a). 4 gradually decreases toward the opposite refrigerant passage 5) 5b.

  Thereby, the flow velocity of the refrigerant guided to the lower side of the refrigerant flow diverting guide 17 can be accelerated toward the non-inverter side refrigerant passage 5b. Therefore, the flow rate of the refrigerant guided from the inverter-side refrigerant passage 5a to the non-inverter-side refrigerant passage 5b can be changed by changing the dynamic pressure of the refrigerant guided to each refrigerant passage 5 to optimize the static pressure distribution.

  The refrigerant flow turning guide is not limited to the present embodiment or the present modification, and may be a porous member. Further, the installation position and dimensions of the refrigerant flow turning guide are not limited to the present embodiment or the present modification, but may be changed depending on the flow rate of the refrigerant led to the inverter side refrigerant passage 5a.

[Sixth Embodiment]
In the inverter-integrated electric compressor of the present embodiment and the air conditioner including the same, the distance between the header portion and the inlet portion of each refrigerant passage is larger than the distance between the header portion and the electric motor. Thus, the second embodiment is the same as the first embodiment. Accordingly, the same configuration and flow are denoted by the same reference numerals and description thereof is omitted.
FIG. 8 shows a schematic configuration diagram of an inverter-integrated electric compressor according to the present embodiment, in which (A) is a cross-sectional view thereof, and (B) is an hh of (A). It is a longitudinal cross-sectional view in a part.

  In the header portion 18, the distance between the header portion 18 and the inlet portion 7 of each refrigerant passage 5 is larger than the distance between the header portion 18 and the electric motor 4. That is, the header portion 18 facing the inlet portion 7 of each refrigerant passage 5 protrudes in the longitudinal direction of the motor-side housing body 2a constituting the housing body 2, and the ring-shaped protruding portion 18a extends in the outer peripheral direction of the motor 4. Is forming. The end surface of the protrusion 18a (the left end surface in FIG. 8B) is orthogonal to the longitudinal direction of the electric motor-side housing body 2a.

  A refrigerant inlet 9 is provided at a position facing the inlet 7a of the inverter-side refrigerant passage (refrigerant passage 5 provided between the inverter 6 and the electric motor 4) 5a of the protrusion 18a. . As shown by the arrow in FIG. 8B, the refrigerant introduced from the refrigerant inlet 9 into the protrusion 18a is introduced into the protrusion 18a as a flow obliquely upward to the left. Since the protruding portion 18a is provided so as to protrude in the longitudinal direction of the electric motor side housing body 2a, the flow of the refrigerant introduced from the obliquely upper left direction into the protruding portion 18a is in the longitudinal direction of the electric motor side housing body 2a. The direction can be changed in parallel.

  Here, since the protrusion 18a provided with the refrigerant inlet 9 is provided so as to face the inlet 7a of the inverter side cooling passage 5a, the refrigerant guided to the protrusion 18a is The refrigerant flows toward the inlet 7a of the cooling passage 5a, and much of the refrigerant inflow dynamic pressure introduced from the refrigerant inlet 9 can be directly used in the inverter-side cooling passage 5a.

  Moreover, since the protrusion 18a is provided in a ring shape on the outer periphery of the electric motor 4, the refrigerant that has not been led to the inverter side cooling passage 5a is formed on the outer periphery of the electric motor 4 as shown by an arrow in FIG. Then, it flows in the projecting portion 18a and is guided to each refrigerant passage 5.

As described above, the inverter-integrated electric compressor according to the present embodiment and the air conditioner including the same have the following effects.
The distance between the header portion 18 and the inlet portion 7 of each refrigerant passage 5 is made larger than the distance between the header portion 18 and the electric motor 4. That is, the protruding portion 18 a of the header portion 18 that faces the inlet portion 7 of each refrigerant passage 5 protrudes in the longitudinal direction of the motor-side housing main body 2 a constituting the housing main body 2. Thus, the refrigerant inlet 9 to the inverter side refrigerant passage (refrigerant passage 5 provided between the inverter unit 6 and the electric motor 4) 5a and the protruding portion of the header portion 18 facing the inverter side refrigerant passage 5a. The refrigerant flow rate of the refrigerant guided to the inverter-side refrigerant passage 5a can be increased by effectively utilizing the inflow dynamic pressure of the refrigerant guided between the refrigerant and the refrigerant 18a.

  Further, since the protruding portion 18a of the header portion 18 facing the inlet portion 7 of each refrigerant passage 5 protrudes in the longitudinal direction of the motor-side housing body 2a, the refrigerant that has not been led to the inverter-side refrigerant passage 5a is removed from the electric motor. 4 can be led to the inlet 7 of each refrigerant passage 5 along the outer circumferential direction. Therefore, the flow rate of the refrigerant guided to the inlet portion 7 of each refrigerant passage 5 can be increased. Therefore, the cooling performance of the inverter unit 6 can be improved, and the cooling performance of the inverter-integrated electric compressor 1 as a whole can be improved.

In the present embodiment, the projecting end surface of the projecting portion 18a has been described as being orthogonal to the longitudinal direction of the housing body 2, but the present invention is not limited to this, as shown in FIG. It is good also as what inclines so that the distance of the header part 19 and the inlet part 7 of each refrigerant path 5 may become short toward the inverter side refrigerant path 5b from the inverter side refrigerant path 5a.
FIG. 9 shows a modification of the inverter-integrated electric compressor according to the present embodiment. FIG. 9A is a cross-sectional view thereof, and FIG. 9B is an ii portion of FIG. FIG.

  In the header portion 19, the distance between the header portion 19 and the inlet portion 7 of each refrigerant passage 5 is larger than the distance between the header portion 19 and the electric motor 4. That is, the header portion 19 that faces the inlet portion 7 of each refrigerant passage 5 protrudes in the longitudinal direction of the motor-side housing body 2 a constituting the housing body 2, and the ring-shaped protruding portion 19 a in the outer peripheral direction of the motor 4. Is forming.

  The end surface of the protruding portion 19a (the left end surface in FIG. 9B) extends from the inverter-side refrigerant passage (refrigerant passage 5 provided between the inverter portion 6 and the motor 4) 5a to the counter-inverter-side refrigerant passage (inverter Inclined so that the distance between the header portion 19 and the inlet portion 7 of each refrigerant passage 5 becomes shorter toward the refrigerant passage 5) 5b on the opposite side of the electric motor 4 with respect to the side refrigerant passage 5a.

  A refrigerant inflow port 9 is provided at a position facing the inlet portion 7a of the inverter side refrigerant passage 5a of the protruding portion 19a. As shown by the arrow in FIG. 9B, the refrigerant introduced from the refrigerant inlet 9 into the protrusion 19a is introduced into the protrusion 19a as an obliquely upper left flow. Since the projecting portion 19a is provided so as to project in the longitudinal direction of the motor-side housing body 2a, the refrigerant flow from the upper left oblique direction introduced into the projecting portion 19a is in the longitudinal direction of the motor-side housing body 2a. It can be changed to parallel.

  Since the protrusion 19a provided with the refrigerant inlet 9 is provided so as to face the inlet 7a of the inverter-side cooling passage 5a, the refrigerant guided to the protrusion 19a is supplied to the inlet of the inverter-side cooling passage 5a. The refrigerant flows toward the portion 7a, and most of the inflow dynamic pressure of the refrigerant introduced from the refrigerant inlet 9 can be directly used in the inverter-side cooling passage 5a.

  Further, since the projecting portion 19a is provided in a ring shape on the outer periphery of the electric motor 4, the refrigerant that has not been led to the inverter side cooling passage 5a is formed on the outer periphery of the electric motor 4 as shown by an arrow in FIG. Then, it flows in the projecting portion 19a and is guided to each refrigerant passage 5.

  Since the end surface of the projecting portion 19a is inclined so as to approach the inverter-side cooling passage 5b from the inverter-side cooling passage 5a, each refrigerant passage 5 is directed from the inverter-side cooling passage 5a toward the anti-inverter-side cooling passage 5b. The flow rate of the refrigerant at the inlet 7 increases. Therefore, in the case of the sixth embodiment, most of the refrigerant flowing along the outer periphery of the electric motor 4 is guided by gravity to the inlet portion 7b of the anti-inverter side refrigerant passage 5b. Can optimize the static pressure of the inlet portion 7 of each refrigerant passage 5 and can optimize the flow rate of the refrigerant guided to each refrigerant passage 5.

DESCRIPTION OF SYMBOLS 1 Electric compressor 2 Housing main body 4 Electric motor 5 Refrigerant channel 6 Inverter part 7 Inlet part 10 Header part

Claims (8)

A compression mechanism that compresses the refrigerant, an electric motor that drives the compression mechanism, an inverter unit that controls the electric motor, and a refrigerant that is provided on the outer periphery of the electric motor and that is guided to the compression mechanism along the longitudinal direction of the electric motor passes A housing body having a plurality of refrigerant passages therein,
A header portion provided at an end portion in a longitudinal direction of the housing main body and having a refrigerant inlet for introducing a refrigerant into the housing main body,
An inverter-integrated electric compressor in which an inlet portion of a refrigerant passage provided between the electric motor and the inverter portion is tapered toward a downstream side of the refrigerant flowing through the refrigerant passage.   2. The inverter-integrated electric compressor according to claim 1, wherein an outlet portion of a refrigerant passage provided between the inverter portion and the electric motor has a shape that widens toward the downstream side of the refrigerant flowing through the refrigerant passage. The refrigerant inlet is provided obliquely upward so as to face the inlet of a refrigerant passage provided between the inverter unit and the electric motor,
3. The inverter-integrated electric compressor according to claim 1, wherein a part of the header portion in which the refrigerant inlet is provided projects outward in a longitudinal direction of the housing body. The refrigerant inlet is provided obliquely upward so as to face the inlet of a refrigerant passage provided between the inverter unit and the electric motor,
The distance in the longitudinal direction of the housing body between the header portion and the inlet portion of each refrigerant passage is opposite to the refrigerant across the electric motor from the refrigerant passage provided between the inverter portion and the electric motor. The inverter-integrated electric compressor according to any one of claims 1 to 3, wherein the electric compressor is gradually shortened toward the passage. The refrigerant inlet is provided obliquely upward so as to face the inlet of a refrigerant passage provided between the inverter unit and the electric motor,
The inverter-integrated electric motor according to any one of claims 1 to 4, wherein a distance between the header portion and an inlet portion of each refrigerant passage is larger than a distance between the header portion and the electric motor. Compressor. The refrigerant inlet is provided obliquely upward so as to face the inlet of a refrigerant passage provided between the inverter unit and the electric motor,
A refrigerant passage that divides the refrigerant in the longitudinal direction of the housing body at a position facing the inlet portion between the header portion and the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor. The inverter-integrated electric compressor according to any one of claims 1 to 5, wherein a sorting guide is provided. The refrigerant inlet is provided obliquely upward so as to face the inlet of a refrigerant passage provided between the inverter unit and the electric motor,
Between the header portion and the inlet portion of the refrigerant passage provided between the inverter portion and the electric motor, a part of the refrigerant flow is placed at a position facing the inlet portion in the inverter portion and the electric motor. The inverter-integrated electric compressor according to any one of claims 1 to 6, further comprising a refrigerant flow turning guide that turns to the inlet portion of the refrigerant passage provided between the first and second refrigerant passages.   An air conditioner comprising the inverter-integrated electric compressor according to any one of claims 1 to 7.

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