JP5244359B2 - Electric compressor for vehicle air conditioning - Google Patents

Description

  The present invention relates to an electric compressor for vehicle air conditioning.

Conventionally, in an inverter-integrated electric compressor for in-vehicle use, since an electric motor that drives a compression unit is disposed in a pressure vessel, a terminal that supplies electric power to the electric motor from the outside has pressure as well as insulation. Ensuring airtightness of the container was also required.
Therefore, various terminals have been proposed in order to ensure the insulation and air tightness required for the terminals (see, for example, Patent Documents 1 and 2).
JP 2007-128756 A JP 2005-180292 A

  In the terminal described in Patent Document 1 described above, the insulating distance between the terminal and the pressure vessel could be ensured by forming the opening of the terminal mounting portion in the pressure vessel wide. However, since the pressure receiving area in the plate portion of the terminal is increased, there is a problem in that it is disadvantageous from the viewpoint of ensuring the strength of the terminal and reducing the size.

  In the terminal described in Patent Document 2 described above, by forming the opening of the terminal mounting portion in the pressure vessel narrow, the pressure receiving area in the plate portion of the terminal can be reduced, and the strength of the terminal can be secured. However, there is a fear that the insulation distance between the terminal and the pressure vessel may be insufficient, and the insulation may not be ensured.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electric compressor for vehicle air-conditioning that can ensure insulation and airtightness of a terminal portion.

In order to achieve the above object, the present invention provides the following means.
An electric compressor for vehicle air conditioning according to the present invention includes an electric unit disposed in a casing, a control unit disposed outside the casing, and an opening communicating the electric unit and the control unit in the casing. Insulating terminals fastened with two bolts that close the opening, and are arranged on a substantially straight line connecting the two bolt centers , penetrate the insulating terminals, and extend to the electric part side and the control part side A plurality of one wiring, a plurality of other wirings electrically connected to at least one of the electric part and the control part, and a plate electrically connected to one of the one wiring and the other wiring A male terminal, a plate portion electrically connected to the other of the one wiring and the other wiring and extending in a plate shape, and disposed at both ends of the plate portion, the male portion between the plate portion A female terminal having a holding portion for holding the terminal, and The plate part of the female terminal and the female terminal are arranged so as to extend at an acute angle or an obtuse angle with respect to the straight line, and the holding part is formed to have elasticity by bending both ends of the plate part. It is characterized by being.

According to the present invention, the plate portions of the male terminal and the female terminal extend so as to intersect at an acute angle or an obtuse angle with respect to the above-mentioned straight line, thereby ensuring an insulation distance between the male terminal and the female terminal and the opening. In addition, the reduction of the opening area in the opening and the reduction of the length along the straight line can be achieved at the same time.
In this way, by reducing the opening area in the opening, the area where the pressure fluid in the housing and the insulated terminal come into contact, that is, the pressure receiving area can be reduced. Furthermore, the arrangement | positioning space | interval of the fixing member which fixes an insulated terminal to a housing | casing can be shortened by shortening the length along the above-mentioned straight line.

For example, when the plate portions of the male terminal and the female terminal are arranged so as to extend in a direction substantially orthogonal to the above-described straight line, the length along the above-described straight line in the opening can be shortened. However, the opening area cannot be reduced.
On the other hand, when the plate portions of the male terminal and the female terminal are arranged so as to extend substantially parallel to the above-mentioned straight line, the opening area at the opening can be reduced, but along the above-mentioned straight line The length cannot be shortened.

  Furthermore, a female terminal and a male terminal contact by arrange | positioning a male terminal between the board part and holding | maintenance part in a female terminal. That is, the female terminal and the male terminal are electrically connected, and one wiring and the other wiring are electrically connected.

  According to the electric compressor for vehicle air conditioning according to the present invention, the male terminal, the female terminal, and the insulated terminal are arranged so that the plate portions of the male terminal and the female terminal extend so as to intersect at an acute angle or an obtuse angle with respect to the straight line. Insulation and airtightness in the vicinity of can be secured.

An electric compressor according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a cross-sectional view illustrating the outline of the configuration of an electric compressor according to an embodiment of the present invention.
In the present embodiment, the electric compressor (electric compressor for vehicle air conditioning) 1 is a compressor used in a vehicle air conditioner, and is applied to an electric compressor whose drive rotation speed is controlled by an inverter. explain.
As shown in FIG. 1, the electric compressor 1 is provided with a scroll compression unit 3 that compresses a refrigerant used in the vehicle air conditioner, and an electric unit 5 that drives the scroll compression unit 3.

  The scroll compressor 3 includes a fixed scroll (not shown) and a orbiting scroll (not shown) for compressing the refrigerant, a main shaft 11 for transmitting the rotational driving force of the electric unit 5 to the orbiting scroll, a fixed scroll and an orbiting scroll. Are housed inside, and an upper bearing case 15 that supports the main shaft 11 is provided.

  The electric unit 5 includes a stator 63 and a rotor 65 that drive the orbiting scroll, a motor case (housing) 67 that houses the stator 63 and the rotor 65, and an inverter unit that controls an alternating current supplied to the stator 63 (control). Part) 69.

  The stator 63 rotates the rotor 65 by forming an alternating magnetic field based on the alternating current supplied from the inverter unit 69.

As shown in FIG. 1, the motor case 67 is provided with a cylindrical cylindrical portion (housing) 77 in which the stator 63 and the rotor 65 are housed, and a box 83 in which the inverter control unit 69 is housed. It has been.
The box 83 houses the inverter unit 69 therein. The box 83 opens toward the radially outer side of the cylindrical portion 77.

FIG. 2 is a cross-sectional view illustrating a configuration of a portion to which an insulating terminal is attached in the motor case of FIG. FIG. 3 is a top view for explaining the configuration of the insulated terminal of FIG.
As shown in FIGS. 1 to 3, the cylindrical portion 77 is provided with an opening 111 for connecting the inverter portion 69 and the electric portion 5.
An insulating terminal 112 is disposed in the opening 111. The insulated terminal 112 includes a metal plate 114 also serving as a pressure-resistant structure, and a single wiring 131 that is a pin that penetrates the metal plate 114 and electrically connects the electric unit 5 and the inverter unit control unit 69 with a glass solidified body. It is integrally formed. By disposing the glass solidified body between the metal plate 114 and the one wiring 131, the metal plate 114 and the one wiring 131 are insulated.

  A insulator 115 is disposed between the metal plate 114 and the male terminal 122 on the surface of the insulating terminal 112 on the electric part 5 side (the lower surface in FIG. 3). The insulator 115 is a member formed in a substantially cylindrical shape using an insulating material, and one wiring 131 is disposed through the insulator 115. Further, the insulating terminal 112 is disposed so as to close the opening 111 by a fixing bolt (not shown) screwed into a fixing bolt hole 113 formed in the cylindrical portion 77.

  A plurality of terminal portions 121 including a male terminal 122 and a female terminal 123 are disposed on the insulated terminal 112. In the present embodiment, description will be made by applying to an example in which the three terminal portions 121 are arranged in a substantially straight line along the radial direction of the cylindrical portion 77 (X direction in FIG. 3).

The opening 111 is formed in a size having a gap between the male terminal 122 and the female terminal 123 arranged on the insulating terminal 112. By forming this gap, insulation between the cylindrical portion 77 and the terminal portion 121 is maintained.
In the present embodiment, the dimension in the X-axis direction in the opening 111 is denoted as dx, and the dimension in the Z-axis direction is denoted as dz.

FIG. 4 is a schematic diagram illustrating the configuration of the male terminal in the terminal portion of FIG. FIG. 5 is a cross-sectional view taken along line AA for explaining the configuration of the male terminal of FIG.
As shown in FIGS. 4 and 5, the male terminal 122 of the terminal portion 121 is a plate-like member attached to one wiring 131 extending along the Y-axis direction. The male terminal 122 is fixed to and electrically connected to at least one of the end on the inverter unit 69 side and the end on the electric unit 5 side of one wiring 131 by, for example, welding.
One wiring 131 is a conductive member that extends through the insulating terminal 112 and extends toward the inverter unit 69 side and the electric unit 5 side, and includes, for example, a pin.

  As shown in FIG. 3, the male terminal 122 is disposed obliquely with respect to the Z axis that is the longitudinal direction of the main shaft 11 in the electric compressor 1, and also obliquely with respect to the X axis that is orthogonal to the Z axis. It arrange | positions and it is arrange | positioned so that it may extend along the Y-axis line which is a direction orthogonal to the paper surface of FIG.

FIG. 6 is a schematic diagram illustrating the configuration of the female terminal in the terminal portion of FIG. 7 is a cross-sectional view taken along the line B-B for explaining the configuration of the female terminal of FIG. 6.
As shown in FIG. 6, the female terminal 123 of the terminal portion 121 is attached to another wiring 132 extending along the Y axis, and is electrically connected to the other wiring 132.
The other wiring 132 is a wiring connected to the inverter unit 69 and the electric motor unit 5.
As shown in FIGS. 6 and 7, the female terminal 123 includes a plate-like plate portion 125 extending along another wiring 132, and a holding portion 126 that holds the male terminal 122 between the plate portion 125. , Is provided.

When the female terminal 123 is attached to the male terminal 122, the plate portion 125 is disposed obliquely with respect to the Z axis that is the longitudinal direction of the main shaft 11 in the electric compressor 1 and is orthogonal to the Z axis. Are also arranged obliquely and so as to extend along the Y axis, which is a direction orthogonal to the paper surface of FIG.
As shown in FIGS. 6 and 7, the holding portion 126 is a member formed to have elasticity by bending both ends of the plate portion 125. FIG. 6 shows an example of the holding portion 126 formed by a bent portion extending along the Y axis.

By forming the holding portion 126 in this manner, the male terminal 122 and the female terminal 123 are slid between the plate portion 125 of the female terminal 123 and the holding portion 126 from the direction along the Y-axis. Can be electrically connected.
Furthermore, since the holding portion 126 has elasticity, the male terminal 122 can be easily held between the plate portion 125 and the holding portion 126.

  As described above, the male terminal 122 may be disposed on one wiring 131 and the female terminal 123 may be disposed on the other wiring 132, or conversely, the female terminal 123 may be disposed on the one wiring 131. In addition, the male terminal 122 may be disposed on the other wiring 132, and is not particularly limited.

Next, refrigerant compression in the electric compressor 1 in the present embodiment will be described.
As shown in FIG. 1, the direct current supplied from the outside of the inverter is controlled in frequency by an electronic element such as a power transistor of the inverter unit 69 and is supplied to the electric unit 5.
In the electric motor 5, the stator 63 forms an alternating magnetic field based on the alternating current whose frequency is controlled. The rotor 65 generates a rotational driving force by interaction with the formed AC magnetic field. The rotational driving force generated by the rotor 65 is transmitted to the main shaft 11.

The rotational driving force is transmitted to the orbiting scroll through the main shaft 11. The orbiting scroll is driven to revolve in a state in which the rotation movement is restricted by the rotation prevention unit.
When the orbiting scroll is driven to revolve, a compression chamber formed between it and the fixed scroll takes in the refrigerant and compresses it. Specifically, the compression chamber takes in the refrigerant at the outer peripheral ends of the fixed scroll and the orbiting scroll. Then, the refrigerant taken in by the revolution of the orbiting scroll is compressed.
The refrigerant compressed in the compression chamber is discharged to the outside of the housing 13.

According to said structure, when the board part 125 of the male terminal 122 and the female terminal 123 extends crossing an acute angle or an obtuse angle with respect to the above-mentioned straight line, the male terminal 122 and the female terminal 123, the opening part 111, and It is possible to achieve both the reduction of the opening area in the opening 111 and the reduction of the length along the above-mentioned straight line while securing the insulation distance between the two.
As described above, by reducing the opening area of the opening 111, the area where the refrigerant in the cylindrical portion 77 contacts the insulating terminal 112, that is, the pressure receiving area can be reduced. Furthermore, by shortening the length along the above-mentioned straight line, it is possible to shorten the arrangement interval of fixing bolts that are fixing members for fixing the insulating terminals 112 to the casing. That is, the insulation and airtightness of the terminal portion in the electric compressor 1 of the present embodiment can be ensured.

For example, when the plate portions 125 of the male terminal 122 and the female terminal 123 are arranged so as to extend in a direction substantially orthogonal to the straight line, the length of the opening 111 along the straight line is reduced. Although it can be achieved, the aperture area cannot be reduced.
On the other hand, when the plate portions of the male terminal 122 and the female terminal 123 are arranged so as to extend substantially parallel to the straight line, the opening area of the opening 111 can be reduced. It is impossible to shorten the length along the line.

  Furthermore, by arranging the male terminal 122 between the plate part 125 and the holding part 126 in the female terminal 123, the female terminal 123 and the male terminal 122 are in contact with each other. That is, the female terminal 123 and the male terminal 122 are electrically connected, and one wiring and the other wiring 132 can be electrically connected.

It is sectional drawing explaining the outline of a structure of the electric compressor which concerns on one Embodiment of this invention. It is sectional drawing explaining the structure of the part to which the insulation terminal in the motor case of FIG. 1 is attached. It is a top view explaining the structure of the insulated terminal of FIG. It is a schematic diagram explaining the structure of the male terminal in the terminal part of FIG. It is an AA cross-sectional view explaining the structure of the male terminal in the terminal part of FIG. It is a schematic diagram explaining the structure of the female terminal in the terminal part of FIG. It is a BB cross-sectional view explaining the structure of the female terminal in the terminal part of FIG.

Explanation of symbols

1 Electric compressor (electric compressor for vehicle air conditioning)
5 Electric parts 67 Motor case (housing)
69 Inverter part (control part)
77 Cylindrical part (housing)
69 Inverter part control part 111 Opening part 112 Insulation terminal 122 Male terminal 123 Female terminal 121 Terminal part 131 One wiring 132 Other wiring 125 Plate part 126 Holding part

Claims (1)

An electric part disposed in the housing;
A control unit arranged outside the housing;
An opening communicating the electric part and the control part in the housing;
An insulated terminal fastened with two bolts closing the opening;
A plurality of wirings arranged on a substantially straight line connecting the two bolt centers and penetrating through the insulated terminal and extending to the electric part side and the control part side;
A plurality of other wirings electrically connected to at least one of the electric unit and the control unit;
A plate-shaped male terminal electrically connected to one of the one wiring and the other wiring;
A plate portion that is electrically connected to the other of the one wiring and the other wiring and extends in a plate shape, and a holding portion that is disposed at both ends of the plate portion and holds the male terminal between the plate portions A female terminal having
The plate portions of the male terminal and the female terminal are arranged to extend so as to intersect an acute angle or an obtuse angle with respect to the straight line,
The holding part is formed so as to have elasticity by bending both ends of the plate part.

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