JP2010178537A - Invrter housing part, and inverter-integrated electric compressor with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive inverter housing part which enables a waterproof packing having versatility and high sealing effect to be used and also enables waterproofness to be enhanced after ensuring simplification of a waterproof structure and assembling easiness of a wiring leading-out part. <P>SOLUTION: The inverter housing part includes: a housing part body 23 which has an opening 19 and inside which an inverter device is housed and installed; a cover 25 which sealably covers the opening 19; O-rings interposed between an slope 31 and the cover 25 which are formed around the opening 19; a grommet installation part 37 which is notched so that the opening 19 comes over the housing part body 23, and leads out wiring; and a plate 41 mounted on a position corresponding to the opening 19 of the grommet installation part 37 and having a plate slope 51 constituting part of the slope 31. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an inverter housing portion and an inverter-integrated electric compressor including the same.

As a compressor for an air conditioner mounted on a vehicle such as an electric vehicle or a hybrid vehicle, an electric compressor in which an inverter device is integrated is used.
In this inverter-integrated electric compressor, an inverter housing portion (inverter box) is provided on the outer periphery of a housing in which the electric motor and the compression mechanism are built. An inverter device that converts DC power supplied from the high-voltage power supply unit into three-phase AC power and supplies power to the electric motor through a glass sealed terminal is incorporated in the inverter housing portion.
The inverter housing portion includes a main body having an opening for inserting the inverter device, and a cover member that covers the opening so as to be hermetically sealed.

Inverter equipment needs to be moisture-proof / waterproof, with some electrical components sealed in resin or filled with gel material in the inverter housing, and the opening of the main body is hermetically sealed with a cover member to provide a waterproof structure It is said.
This hermetic seal is usually performed by an endless waterproof packing such as an O-ring interposed between the periphery of the opening and the cover member.
Moreover, the wiring cable connected to an inverter apparatus is pulled out through the wall of the main body through, for example, a grommet. Sealing around this grommet and around the distribution cable is required.

The waterproof structure of the wiring cable lead-out portion using the grommet or the waterproof packing is, for example, as shown in Patent Document 1, and is configured to seal by combining each member inside and outside the wall of the inverter housing portion. It becomes complicated and takes time to assemble.
In order to solve this problem, a grommet installation part is provided on the wall of the inverter housing part so as to cover the opening, and the grommet that is an integral structure is inserted into the grommet installation part from the opening side to provide a seal structure for the grommet installation part. The one that completes is used.
Moreover, as shown in Patent Document 2, an electric wire packing portion having an electric wire passage hole formed in the mating surface of the cover member and the main body, closely penetrating the electric wire passage hole and penetrating the wiring cable is provided. There has been proposed a technique for forming a waterproof seal and sealing an opening and a wiring cable by attaching the waterproof seal.

Japanese Patent No. 2874690 Japanese Patent Laid-Open No. 08-2222011

By the way, in the case where the grommet installation portion that covers the opening portion is provided on the wall of the inverter housing portion, the opening portion is divided by the grommet installation portion, and therefore an endless packing such as an O-ring cannot be used. For this reason, a liquid gasket, silicon packing, or the like is used for sealing the opening, but the sealing performance is insufficient.
Moreover, in what is shown by patent document 2, unless it manufactures with sufficient precision, such as a position of a wire packing part formed in a waterproof packing, and a shape, sufficient sealing performance cannot be exhibited. For this reason, it is difficult to manufacture the waterproof packing, the cost is high, and the assembly is also difficult.

  In view of the above-mentioned problems, the present invention ensures a simplified waterproof structure of the wiring lead-out portion and ease of assembly, allows a versatile waterproof seal effect to be used, is inexpensive, and It is an object of the present invention to provide an inverter housing portion that can improve waterproofness and an inverter-integrated electric compressor using the same.

In order to achieve the above object, the present invention provides the following means.
The first aspect of the present invention includes an accommodating portion main body having an opening, in which the inverter device is accommodated and installed, a cover member that covers the opening in a sealable manner, and a waterproof formed around the opening. An endless waterproof packing interposed between the packing holding portion and the cover member, a wiring lead-out portion that is notched so as to cover the opening in the housing portion main body, and draws out the wiring, and the wiring lead-out And a plate member attached to a position corresponding to the opening of the part and having a partial waterproof packing holding part that constitutes a part of the waterproof packing holding part.

According to this aspect, since the wiring lead-out portion that pulls out the wiring is formed by notching the housing main body so as to cover the opening, for example, the grommet to which the wiring is attached has an integral structure. The wiring can be sealed by inserting from the side. Therefore, simplification of the waterproof structure of the wiring lead portion and ease of assembly can be ensured.
Also, after attaching the grommet, if the plate member is attached to the position corresponding to the opening of the wiring lead-out part, the partial waterproof packing holding part of the plate member is located at the divided part of the waterproof packing holding part, and the waterproof packing holding Since a part of the part is configured, the waterproof packing holding part is formed in a continuous form.
As a result, a waterproof packing having high versatility and a high sealing effect can be interposed between the waterproof packing holding portion formed around the opening and the cover member, so that the waterproof structure is inexpensive and highly waterproof. Can be formed.
Therefore, the inverter accommodating portion can be manufactured at a low cost and the waterproofness can be improved. As a result, the inverter housing portion can withstand severe waterproofing requirements from high temperature atmosphere to low temperature submersion.

  In the above aspect, it is desirable that the cover member has sufficient rigidity to compress the waterproof packing.

  In this case, even if the waterproof packing is sufficiently compressed, the cover member is not deformed by the reaction force from the waterproof packing, so that sufficient waterproof performance can be exhibited.

  Moreover, in the said aspect, you may make it attach the reinforcement member which reinforces the rigidity of the mounting position of the said waterproof packing at the outer side of the said cover member at least.

In this case, the rigidity of at least the waterproof packing mounting position of the cover member is increased by the reinforcing member. Therefore, even if a thin cover member with low rigidity is used, the reaction force from the waterproof packing due to the compression of the waterproof packing. Therefore, the cover member is not deformed. Since the deformation of the cover member due to the reaction force from the waterproof packing is suppressed, sufficient waterproof performance can be exhibited.
Since the cover member itself may be a thin plate, for example, a damping steel plate can be used, and noise prevention or the like can be achieved.

  In the above aspect, a wall portion surrounding the periphery of the cover member may be provided in the housing main body, and the resin may be filled so as to cover the cover member attached to the inside of the wall portion.

  If it does in this way, since resin complements the seal by waterproof packing, waterproof performance can be improved further.

  Furthermore, in the said aspect, the pocket part which protruded outside may be formed in the said wiring drawer | drawing-out part of the said accommodating part main body, and you may make it fill resin with the inside of this pocket part.

  If it does in this way, since resin complements the seal | sticker by the waterproof structure of a wiring drawer | drawing-out part, waterproof performance can be improved further.

  Furthermore, in the said aspect, the said waterproof packing may be comprised with the metal core material bent in the predetermined shape, and the elastic body integrally shape | molded around this core material.

The waterproof packing is manufactured by bending a metal core material into, for example, a shape along the shape of the waterproof packing holding portion of the opening, and integrally molding an elastic body around the core material. In addition, you may join the termination | terminus of a core material by welding, for example.
The waterproof packing manufactured in this way has a small amount of material to be discarded at the time of manufacturing, in other words, because the yield is very high, it can be manufactured at a low cost.
Further, since the waterproof packing is manufactured in a shape along the shape of the installation portion, it can be easily mounted at a predetermined position, and workability during assembly can be improved.
Since the core material can be manufactured by, for example, extrusion molding, the cross-sectional shape can be an arbitrary shape.

  According to a second aspect of the present invention, there is provided a housing incorporating a compression mechanism and an electric motor that operates the compression mechanism, and an inverter-integrated electric compression device provided with the inverter housing portion of the first aspect on the outer periphery of the housing. Machine.

  Thus, since the inverter accommodating part which can be manufactured at low cost and can improve waterproofness is used, the inverter-integrated electric compressor can be manufactured at low cost and severe from high temperature atmosphere to low temperature submersion. Can withstand waterproof requirements.

According to the present invention, the wiring lead-out portion that pulls out the wiring is formed by being cut out in the housing body so as to cover the opening, so that the waterproof structure of the wiring lead-out portion is simplified and the assembly is easy. can do.
Further, since the partial waterproof packing holding part of the plate member is located at a part where the waterproof packing holding part is divided and constitutes a part of the waterproof packing holding part, it is possible to form an inexpensive and highly waterproof waterproof structure. it can.
Therefore, the inverter accommodating portion can be manufactured at a low cost and the waterproofness can be improved.

1 is an external side view of an inverter-integrated electric compressor 1 according to a first embodiment of the present invention. It is a top view of the storage part main body concerning 1st Embodiment of this invention. FIG. 3 is an X view of FIG. 2. FIG. 3 is a YY end view of FIG. 2 showing a state before the cover according to the first embodiment of the present invention is closed. It is a YY end elevation of Drawing 2 showing the state where the cover concerning a 1st embodiment of the present invention was closed. It is a fragmentary top view of the accommodating part main body which shows the state which removed the plate concerning 1st Embodiment of this invention. It is a top view of the plate concerning a 1st embodiment of the present invention. It is ZZ sectional drawing of FIG. It is a fragmentary top view which shows another embodiment of the accommodating part main body concerning 1st Embodiment of this invention, and shows the state which removed the plate. It is the same partial top view as FIG. 9 which shows the state which attached the plate. It is a partial top view which shows another embodiment of the accommodating part main body concerning 1st Embodiment of this invention, and shows the state which removed the plate. It is the same partial top view as FIG. 11 which shows the state which attached the plate. It is an end elevation which shows the cross section of the inverter accommodating part concerning 2nd Embodiment of this invention. It is a perspective view which shows the plate concerning 2nd Embodiment of this invention. It is sectional drawing of the waterproof packing concerning 2nd Embodiment of this invention. It is explanatory drawing which shows the manufacturing process of the waterproof packing concerning 2nd Embodiment of this invention. It is sectional drawing which shows another embodiment of the waterproof packing concerning 2nd Embodiment of this invention. It is a top view which shows the cover concerning 3rd Embodiment of this invention. It is WW sectional drawing of FIG. It is a perspective view which shows the cover part concerning 4th Embodiment of this invention. It is an end view which shows the cross section of the inverter accommodating part concerning 5th Embodiment of this invention.

Embodiments of an inverter-integrated electric compressor according to the present invention will be described below with reference to the drawings.
[First Embodiment]
An inverter-integrated electric compressor 1 according to a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is an external side view of an inverter-integrated electric compressor 1 according to the first embodiment of the present invention.
In the present embodiment, the inverter-integrated electric compressor 1 is a compressor used in a vehicle air conditioner, and will be described assuming that the drive speed is controlled by the inverter.

The inverter-integrated electric compressor 1 includes a housing 3 having a pressure-resistant structure that constitutes an outer shell thereof. The pressure-resistant structure housing 3 is configured by integrally fastening and fixing a motor housing 5 in which an electric motor (not shown) is accommodated and a compressor housing 7 in which a compression mechanism (not shown) is accommodated with a bolt 9. .
The motor housing 5 and the compressor housing 7 are made of aluminum die casting so as to ensure sufficient strength as a pressure vessel.

An electric motor and a compression mechanism (not shown) built in the housing 3 are connected via a motor shaft (not shown), and the compression mechanism is driven by the rotation of the electric motor.
A refrigerant suction port 11 is provided on one end side of the motor housing 5 (left side in FIG. 1), and low-temperature and low-pressure refrigerant gas sucked into the motor housing 5 from the refrigerant suction port 11 is around the electric motor. After being distributed along the motor axis L direction, it is sucked into the compression mechanism and compressed.
The high-temperature and high-pressure refrigerant gas compressed by the compression mechanism is discharged into the compressor housing 7 and then sent out from the discharge port 13 provided on one end side (right side in FIG. 1) of the compressor housing 7. It is configured to be.

The housing 3 is attached to a total of three legs, two on one side of the motor housing 5 (left side in FIG. 1) and two on the lower side of the compressor housing 7 and one on the upper side of the compressor housing 7. 15A, 15B, and 15C are provided.
The inverter-integrated electric compressor 1 is mounted by mounting the mounting legs 15A, 15B, and 15C on a side wall or the like of a traveling prime mover installed in the engine room of the vehicle via brackets and bolts. It is like that.
In general, the inverter-integrated electric compressor 1 is often supported in a cantilevered state at three or four points in the vertical direction with its motor axis L direction directed in the front-rear direction or left-right direction of the vehicle via a fixed bracket.

Further, an inverter housing portion 17 is integrally formed on the outer peripheral portion of the motor housing 5 at the upper portion thereof.
The inverter housing portion 17 includes a housing portion main body 23 having a box structure surrounded by a peripheral wall 21 having a predetermined height that forms an opening portion 19 whose one surface (upper side in FIG. 1) is open, and a housing portion main body 23. And a cover (cover member) 25 that covers the opening 19 in a sealable manner.

An inverter device 27 that converts DC power supplied from a high-voltage power source into three-phase AC power and supplies power to the electric motor is incorporated in the inverter accommodating portion 17, and the rotational speed of the electric compressor is determined according to the air conditioning load. It can be variably controlled.
The inverter device 27 includes a smoothing capacitor (not shown) provided on the high-voltage power supply line, a high-voltage system component such as a normal mode coil and a common mode coil, a power system board, a CPU board, various connection terminals and the like, which are integrally inserted. And a molded inverter module 29.
The inverter device 27 is configured to be connected to an external high-voltage power source or a vehicle-side ECU (Electric Control Unit) which is a host-side host controller by a wiring cable 26.

  FIG. 2 is a plan view of the storage unit main body 19. FIG. 3 is an X view of FIG. 4 and 5 are end views schematically showing the YY end surface of FIG. 2, FIG. 4 shows a state before the cover 25 is closed, and FIG. 5 shows a state where the cover 25 is closed. . FIG. 6 is a partial plan view of the storage unit main body 23 with the plate (plate member) 41 removed. FIG. 7 is a plan view of the plate 41. FIG. 8 is a ZZ sectional view of FIG.

The top of the peripheral wall 21 of the housing body 23 receives an inclined surface (waterproof packing holding portion) 31 that is inclined so as to open outward, and a cover 25 that is a flat surface that continues to the outside of the inclined surface 31. A surface 33 is formed.
A protruding portion 35 that protrudes outward is formed on the peripheral wall 21 of the housing portion main body 23 at an upper position on one side surface thereof.

At a position corresponding to the protruding portion 35 of the peripheral wall 21, a grommet installation portion (wiring lead-out portion) 37 that is notched in a substantially U shape so that the opening portion covers the opening portion 19 is provided.
A plate installation part 39 is provided so as to protrude along the inside of the grommet installation part 37. The top portion of the plate installation portion 39 forms a plane located below the receiving surface 33 and the inclined surface 31 and receives the plate (plate member) 41.
On the inner side of the plate installation portion 39, a convex portion 45 protruding along a U-shape is provided.

The grommet 43 has a substantially rectangular parallelepiped shape made of hard rubber, for example. On the outer periphery of the grommet 43, a groove 47 extending over three surfaces is formed so as to be fitted to the convex portion 45.
The grommet 43 is provided with a through hole 49 that penetrates in the thickness direction and through which the wiring cable 26 is inserted. A plurality of, for example, three through holes 49 are provided so that a predetermined number of wiring cables 26 can be inserted.

The plate 41 is a metal plate member having a substantially rectangular shape. The plate 41 has a planar shape that substantially covers the top of the plate installation portion 39, and the thickness thereof is substantially equal to the distance between the top of the plate installation portion 39 and the upper surface of the receiving surface 33.
The plate 41 is configured to be fixed and installed on the plate installation part 39 by means such as bolting. A resin member such as a liquid gasket is applied between the plate 41 and the plate setting portion 39 to fill the gap. The plate 41 is provided with a plate inclined surface (partial waterproof packing holding portion) 51 which is inclined from the side surface facing the opening 19 toward the upper surface at the installation position. The plate inclined surface 51 is disposed so as to connect the inclined surface 31 divided by the grommet setting portion 37 when the plate 41 is installed. In other words, the plate inclined surface 51 constitutes a part of the inclined surface 31 and forms the inclined surface 31 continuous along the opening 19.

The grommet 43 is inserted so that the groove 47 fits into the convex portion 45 of the grommet installation portion 37 in a state where the wiring cable 26 is inserted through the through hole 49, and is pressed by tightening when the plate 41 is fixed. 43 comes into close contact with the grommet setting portion 37. Further, since the diameter of the through hole 49 is smaller than the wiring cable 26, the surface pressure of the contact portion between the through hole 49 and the wiring cable 26 is increased, so that the introduction portion of the wiring cable 26 into the inverter accommodating portion 17 is in a watertight state. It is designed to be sealed.
Since the grommet installation part 37 forms a sealed wall part along the peripheral wall 21, a pocket part 59 which is a pocket-like space is formed between the protrusion part 35.

On the housing part main body 23 side of the cover 25, an inlay part 53 having an outer shape that is substantially the same shape as the peripheral wall 21 and slightly smaller than that is provided so as to protrude.
An O-ring 55 that is an endless waterproof packing is held around the spigot portion 53. In other words, the dimension of the O-ring 55 is set based on the circumference of the spigot part 53.
The O-ring 55 is interposed between the side surface of the spigot portion 53 and the back surface of the cover 25 and the inclined surface 31 when the cover 25 is attached to the housing main body 23.
In this state, the cover 25 is screwed with a screw 57 or the like, whereby the opening 19 is hermetically sealed in a watertight state.

  The cover 25 is made of aluminum die casting and has sufficient rigidity to compress the O-ring 55. can do. Thereby, even if the O-ring 55 is sufficiently compressed, the cover 25 is not deformed by the reaction force from the O-ring 55, so that sufficient waterproof performance can be exhibited.

With the configuration described above, according to the present embodiment, the following operational effects can be obtained.
The inverter device 27 of the inverter-integrated electric compressor 1 is supplied with high-voltage DC power from a high-voltage power supply via a power cable (not shown).
This DC power is converted into three-phase AC power having a predetermined frequency by an electronic element such as a power transistor of the inverter module 29 and supplied to the electric motor. The electric motor generates a rotational driving force based on an alternating current whose frequency is controlled. This rotational driving force is transmitted to the compression mechanism via the motor shaft and operates the compression mechanism.

The low-temperature and low-pressure refrigerant gas sucked into the motor housing 5 from the refrigerant suction port 11 by the operation of the compression mechanism flows around the electric motor along the direction of the motor axis L, and is then sucked into the compression mechanism and compressed. .
The high-temperature and high-pressure refrigerant gas compressed by the compression mechanism is discharged into the compressor housing 7 and then sent out from the discharge port 13 to the outside.
The low-temperature and low-pressure refrigerant gas flowing in the motor housing 5 in the direction of the motor axis L cools the electric motor in the meantime and is installed on the bottom surface of the inverter housing portion 17 via the wall surface of the motor housing 5. The heat generating component of the device 27 is cooled.

On the other hand, low voltage power and a control signal are transmitted and transmitted to the inverter device 27 via a plurality of wiring cables 26.
The inverter device 27 is driven and controlled by the low voltage power and the control signal. The inverter accommodating portion 17 in which the inverter device 27 is installed is sealed by a cover 25 to ensure waterproofness, and the introduction portion of the wiring cable 26 is also sealed in a watertight state.

That is, the wiring cable 26 is penetrated into the inverter accommodating part 17 through the grommet 43 installed in the grommet installing part 37 of the accommodating part main body 23.
The grommet 43 is inserted so that the groove 47 is fitted to the convex portion 45 of the grommet installation portion 37 in a state where the wiring cable 26 is inserted.
The inserted grommet 43 is pressed by fastening when the plate 41 is fixed, so that the grommet 43 comes into close contact with the grommet setting portion 37. Further, since the diameter of the through hole 49 is smaller than the wiring cable 26, the surface pressure of the contact portion between the through hole 49 and the wiring cable 26 is increased, so that the introduction portion of the wiring cable 26 into the inverter accommodating portion 17 is in a watertight state. It is designed to be sealed.

Thus, since the grommet 43 to which the wiring cable 26 is attached can be inserted and mounted from the upper side of the opening 19, it can have an integral structure.
Further, the attached grommet 43 is deformed as the plate 41 is attached, and the sealing of the wiring cable 26 can be completed.
Therefore, simplification of the waterproof structure of the grommet installation portion 37 and ease of assembly can be ensured.

Further, when the plate 41 is attached, the inclined surface 31 of the plate 41 is connected to the inclined surface 31 divided by the grommet setting portion 37, and the inclined surface 31 continuous along the opening 19 can be formed.
Thus, a waterproof packing having a versatile and high sealing effect can be interposed between the inclined surface 31 formed around the opening 19 and the cover 25, so that it is inexpensive and waterproof. High waterproof structure can be formed.

Since the opening 19 is sealed in a watertight state by attaching the cover 25 to the housing main body 23 in a state where the O-ring 55 is mounted around the inlay portion 53, the waterproofing operation of the opening 19 is simplified. Can do.
Further, since the grommet 43 is pressed by the plate 41, and the plate 41 is pressed by the cover 25 via the O-ring 55, the wiring cable 26 can be more reliably maintained in a watertight state.

  Therefore, the inverter accommodating part 17 can be manufactured at low cost and can improve waterproofness. Thereby, the inverter accommodating part 17 can endure the severe waterproof request | requirement from a high temperature atmosphere to a low temperature submergence.

  Further, the inside of the pocket portion 59 may be filled with resin. If it does in this way, since resin complements the seal | sticker by the waterproof structure of the grommet installation part 37, waterproof performance can be improved further.

In the present embodiment, the grommet setting part 37 is formed along the peripheral wall 21 and the wiring cable 26 is led out above the pocket part 59, but the present invention is not limited to this.
For example, as shown in FIGS. 9 and 10, the projecting portion 35 may be provided with a second grommet installation portion 61. The cover 25 is shaped to cover the protruding portion 35, and the grommet 63 of the grommet installation portion 61 is pressed by the cover 25. The wiring cable 26 is led out to the side surface of the housing part main body 23 through the grommet setting part 37 and the grommet setting part 59.

  Further, as shown in FIGS. 11 and 12, the protruding portion 35 may be provided with the second grommet setting portion 61, and the grommet setting portion 37 may be provided with only the plate setting portion 39. In this case, the cover 25 is shaped to cover the protruding portion 35, and the grommet 63 of the grommet installation portion 61 is pressed by the cover 25. The wiring cable 26 is led out to the side surface of the housing main body 23 through the grommet setting portion 59.

  In this embodiment, the O-ring 55 is used as the endless waterproof packing. However, the cross-sectional shape of the waterproof packing is not limited to a circular shape like the O-ring 55, and an arbitrary shape is used. Can be used.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
The basic configuration of this embodiment is basically the same as that of the first embodiment, but the waterproof structure of the opening 19 is different from that of the first embodiment. Therefore, in this embodiment, this different part is demonstrated and description is abbreviate | omitted about another overlapping thing.
In addition, about the component same as 1st Embodiment, the same code | symbol is attached | subjected and the duplicate description is abbreviate | omitted.
FIG. 13 is an end view showing a cross-section of the inverter storage portion 17. FIG. 14 is a perspective view showing the plate 67. FIG. 15 is a cross-sectional view of the waterproof packing 71. FIG. 16 is an explanatory view showing a manufacturing process of the waterproof packing 71.

A receiving surface 33 that receives the cover 25 is formed on the top of the peripheral wall 21 of the storage unit main body 23 in the present embodiment. On the receiving surface 33, a packing receiving groove (waterproof packing holding portion) 65 having a substantially rectangular cross section on the opening 19 side is formed in a range excluding the grommet setting portion 37.
A plate (plate member) 67 fixed and attached to the plate installation portion 39 of the grommet installation portion 37 by means such as bolting is a substantially rectangular metal plate member as shown in FIG. The plate 67 is formed with a partial packing receiving groove (partial waterproof packing holding portion) 69 arranged so as to connect the packing receiving groove 65 divided by the grommet setting portion 37 at the installation position.
The packing receiving groove 65 and the partial packing receiving groove 69 form a continuous groove along the shape of the opening 19.

An endless waterproof packing 71 having a substantially rectangular cross section is mounted in a groove formed to be continuous by a packing receiving groove 65 and a partial packing receiving groove 69. Although the waterproof packing 71 has a substantially rectangular cross section, the waterproof packing 71 may have a circular cross section such as an O-ring 55, and an arbitrary shape can be used.
The cover 25 is a metal plate member shaped to cover the receiving surface 33 as shown in FIG. For example, if it is made of a vibration-proof steel plate, noise can be prevented.
The cover 25 desirably has sufficient rigidity to compress the waterproof packing 71.

As shown in FIG. 15, the waterproof packing 71 includes a metal core 73 bent in accordance with the shapes of the packing receiving groove 65 and the partial packing receiving groove 69, and insert molding integrally around the core 73. Hard rubber (elastic body) 75.
The core material 73 is an extruded material having an H-shaped cross section. The waterproof packing 71 is installed in the packing receiving groove 65 and the partial packing receiving groove 69 so that two H-shaped vertical portions (hereinafter referred to as flange portions) of the core member 73 face in the vertical direction.

When this waterproof packing 71 is compressed, a pressure distribution 76 as shown in FIG. 15 is obtained. That is, since the pressure becomes maximum at the two flange portions, an effect such as a labyrinth is generated, and the sealing performance can be improved.
For example, as shown in FIG. 17, even if the waterproof packing 71 uses an X-shaped core member 73, the sealing performance can be improved.

The waterproof packing 71 is manufactured as shown in FIG. (A) A core material 73 having a predetermined length is formed. For example, it is possible to use any means such as cutting a mold steel or a steel bar to a predetermined length, or molding by extrusion molding and cutting to a predetermined length. For example, when the core material 73 is manufactured by extrusion molding, the cross-sectional shape can be an arbitrary shape, so that the cross-sectional shape according to the purpose can be obtained.
(B) The core material 73 having a predetermined length is bent into a shape along the shape of the portion to be installed. At this time, the end portion of the core material 73 may be joined by welding or may be left as it is.
(C) A hard rubber 75 is integrally insert-molded around the bent core material 73.

The waterproof packing 71 manufactured in this way has a small amount of material discarded at the time of manufacture, in other words, because the yield is very high, it can be manufactured at low cost.
For example, in a conventional waterproof packing using a core material, a method of punching and forming a steel plate as the core material is often used. In this case, since the amount of punching waste is large, the yield is low.
Since the waterproof packing 71 manufactured in this way is manufactured in a shape along the shape of the installation portion, it can be easily mounted at a predetermined position and workability during assembly can be improved. .

According to the present embodiment configured as described above, the following operational effects can be obtained.
Since the operation of the inverter-integrated electric compressor 1 and the watertight structure of the wiring cable 26 are the same as those in the first embodiment, a duplicate description is omitted.
When the plate 67 is attached, the partial packing receiving groove 69 of the plate 67 is connected to the packing receiving groove 65 divided by the grommet setting portion 37, and a continuous groove can be formed along the opening 19. The waterproof packing 71 is attached to the continuous groove.
Accordingly, since the waterproof packing 71 having versatility and high sealing effect can be interposed between the inclined surface 31 formed around the opening 19 and the cover 25, it is inexpensive and waterproof with high waterproofness. A structure can be formed.

In this state, by attaching the cover 25 to the housing main body 23, the opening 19 is sealed in a watertight state, so that the waterproof operation of the opening 19 can be simplified.
Therefore, the inverter accommodating part 17 can be manufactured at low cost and can improve waterproofness. Thereby, the inverter accommodating part 17 can endure the severe waterproof request | requirement from a high temperature atmosphere to a low temperature submergence.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIGS.
The basic configuration of the present embodiment is basically the same as that of the second embodiment, but the configuration of the cover 25 is different from that of the second embodiment. Therefore, in this embodiment, this different part is demonstrated and description is abbreviate | omitted about another overlapping thing.
In addition, about the component same as 2nd Embodiment, the same code | symbol is attached | subjected and the duplicate description is abbreviate | omitted.
FIG. 18 is a plan view showing the cover 25. FIG. 19 is a WW sectional view of FIG.

The cover 77 in the present embodiment is made of aluminum die casting. The cover 77 includes a cover body 79 that is chamfered and has a substantially quadrangular pyramid shape, and ribs 81 that are arranged vertically and horizontally in the inner space of the cover body 79.
The cover 77 configured as described above has a large rigidity, that is, a rigidity sufficient to compress the waterproof packing 71. Therefore, even if the waterproof packing 71 is sufficiently compressed, the cover 77 is not deformed by the reaction force from the waterproof packing 71, so that sufficient waterproof performance can be exhibited.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIG.
The basic configuration of this embodiment is basically the same as that of the second embodiment, but the configuration of the cover 25 portion is different from that of the second embodiment. Therefore, in this embodiment, this different part is demonstrated and description is abbreviate | omitted about another overlapping thing.
In addition, about the component same as 2nd Embodiment, the same code | symbol is attached | subjected and the duplicate description is abbreviate | omitted.
FIG. 20 is a perspective view showing the cover 25 portion.

A reinforcing member 83 that reinforces the rigidity of the mounting position of the waterproof packing 71 is attached to the outside of the cover 25 in the present embodiment.
In this way, the cover 25 has the reinforcing member 83 to increase the rigidity of the mounting position of the waterproof packing 71, so that even if the thin cover 25 having a low rigidity is used, the cover 25 is protected from the waterproof packing 71 due to the compression of the waterproof packing 71. The cover 25 is not deformed by the reaction force.
Thus, since the deformation | transformation of the cover 25 by the reaction force from the waterproof packing 71 is suppressed, the waterproof structure of the opening part 19 can exhibit sufficient waterproof performance.
Since the cover 25 itself may be a thin plate, for example, a damping steel plate can be used, and noise prevention or the like can be achieved.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described with reference to FIG.
The basic configuration of this embodiment is basically the same as that of the second embodiment, but the configuration of the cover 25 portion is different from that of the second embodiment. Therefore, in this embodiment, this different part is demonstrated and description is abbreviate | omitted about another overlapping thing.
In addition, about the component same as 2nd Embodiment, the same code | symbol is attached | subjected and the duplicate description is abbreviate | omitted.
FIG. 21 is an end view showing a cross section of the inverter accommodating portion 17.

A protruding wall 85 protruding upward is provided on the outer peripheral side of the top of the peripheral wall 21 in the present embodiment. The protruding wall 85 is provided so as to surround the entire periphery of the cover 25.
In this embodiment, an O-ring 55 is attached to the packing receiving groove 65 and the partial packing receiving groove 69 in place of the waterproof packing 71.
After the cover 25 is attached, a resin 87 is filled inside the protruding wall 85 so as to cover the attached cover 25.

  If it does in this way, since the resin 87 complements the seal | sticker by the O-ring 55, waterproof performance can be improved further.

  In addition, this invention is not limited to each embodiment mentioned above, In the range which does not deviate from the summary, it can change suitably. For example, in the above embodiment, the inverter housing portion 17 is integrally formed with the motor housing 5, but the inverter housing portion 17 may be configured separately from the motor housing 5.

DESCRIPTION OF SYMBOLS 1 Inverter integrated electric compressor 3 Housing 17 Inverter accommodating part 19 Opening part 23 Accommodating part main body 25 Cover 26 Wiring cable 27 Inverter apparatus 31 Inclined surface 37, 61 Grommet installation part 41, 67 Plate 51 Plate inclined surface 55 O-ring 59 Pocket Part 65 Packing receiving groove 69 Partial packing receiving groove 71 Waterproof packing 73 Core material 75 Hard rubber 83 Reinforcing member 85 Projecting wall 87 Resin

Claims (7)

An accommodating portion main body having an opening and accommodating the inverter device therein;
A cover member that covers the opening in a sealable manner;
A waterproof packing holding portion formed around the opening and an endless waterproof packing interposed between the cover member;
A wiring lead-out portion that is cut out so as to cover the opening in the housing body, and draws out the wiring;
A plate member attached to a position corresponding to the opening of the wiring lead portion and having a partial waterproof packing holding portion constituting a part of the waterproof packing holding portion;
An inverter storage section characterized by comprising:   The inverter housing portion according to claim 1, wherein the cover member has sufficient rigidity to compress the waterproof packing.   The inverter storage portion according to claim 1, wherein a reinforcing member that reinforces at least the rigidity of the mounting position of the waterproof packing is attached to the outside of the cover member.   4. The housing according to claim 1, wherein a wall portion surrounding the periphery of the cover member is provided in the housing portion main body, and resin is filled so as to cover the cover member mounted inside the wall portion. The inverter housing part according to the above.   5. The pocket according to claim 1, wherein a pocket portion protruding outward is formed in the wiring lead-out portion of the housing portion main body, and a resin is filled inside the pocket portion. Inverter housing.   6. The waterproof packing according to claim 1, wherein the waterproof packing comprises a metal core member bent into a predetermined shape and an elastic body integrally molded around the core member. The inverter storage section described. A housing containing a compression mechanism and an electric motor for operating the compression mechanism;
An inverter-integrated electric compressor, wherein the inverter housing portion according to any one of claims 1 to 6 is provided on an outer periphery of the housing.

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