JP5431096B2 - Electric compressor - Google Patents

Description

  The present invention relates to an electric compressor provided with a terminal cover that covers a terminal for supplying power to an electric element housed in an airtight container.

  An electric compressor in which an electric element and a compression element driven by the electric element are housed in an airtight container. In the airtight container, a terminal for supplying power to the electric element housed inside is attached. Yes. The terminal includes an insulating glass portion and a plurality of conductive pins attached so as to penetrate through the glass portion. And the front-end | tip part of a conductive pin is connected with the some wiring.

  The portion of the terminal located outside the sealed container is conventionally covered with a cover, and dust such as dust adheres to the terminal, resulting in inconvenience that the insulation performance of the conductive pin deteriorates, and the pin due to external force The deformation of the part was prevented.

  By the way, when such an electric compressor is used in an environment exposed to wind and rain, it is necessary to protect it with a cover so that water does not enter a terminal located outside the sealed container. In order to prevent water from entering the terminal as described above, a terminal cover that is covered with an elastic rubber cover has been developed (see, for example, Patent Document 1).

JP-A-4-166684

  However, none of the structures has sufficient water resistance, and in particular, the water resistance in the wiring lead-out portion that pulls out the wiring is insufficient, and improvement has been desired.

  The present invention has been made to solve the problems of the related art, and provides an electric compressor capable of reliably preventing water from entering a terminal for supplying power to an electric element. Objective.

That is, the electric compressor according to the first aspect of the present invention includes a terminal cover that covers a terminal for supplying power to the electric element housed in the hermetically sealed container, and the terminal cover is a transparent member through which the terminal passes. A terminal box having a hole on the bottom and a wiring lead-out part on the side for drawing out the wiring that is electrically connected to the terminal, and a lid that opens and closes the top opening of the terminal box A member, a gasket that provides a watertight seal between the lid member and the opening edge of the terminal box, and a wire tightening that is provided in a wiring lead-out portion on the side of the terminal box and that is watertightly pressed against the outer peripheral surface of the tube that binds the wires The terminal box is attached to the closed container with the terminal placed in the through hole, and the space between the peripheral edge of the through hole on the bottom and the closed container is sealed. Together are watertightly sealed in timber, instrument with wire tightening has a tubular body extending from the wiring lead-out portion of the terminal box side, the base of the tube body is watertight connected to the terminal box, The tip of the tube is watertightly pressed against the outer peripheral surface of the tube .

An electric compressor according to a second aspect of the present invention includes a terminal cover that covers a terminal for supplying electric power to an electric element housed in an airtight container, and the terminal cover has a through hole through which the terminal passes. A terminal box having a wiring lead-out portion on the side surface for pulling out the wiring electrically connected to the terminal on the bottom surface, and a top member opening the top surface of the terminal box; A gasket for watertight sealing between the lid member and the opening edge of the terminal box; and a wiring fastener provided in a wiring lead-out portion on the side of the terminal box and in watertight pressure contact with the outer peripheral surface of the tube for binding the wires; The terminal box is attached to the sealed container with the terminal placed in the through-hole, and the space between the through-hole periphery of the bottom surface and the sealed container is the sealing material. Together are watertightly sealed, fitting with wire tightening has a flexible tube extending from the wiring lead-out portion of the terminal box sides, wiring to the tube body is inserted, at the base of the tube It is characterized by being in watertight pressure contact with the outer peripheral surface of the tube.

According to the first aspect of the present invention, in the electric compressor provided with the terminal cover for covering the terminal for supplying power to the electric element housed in the sealed container, the terminal cover has a through hole through which the terminal passes on the bottom surface. A terminal box having a wiring lead-out portion on the side surface for drawing out the wiring electrically connected to the terminal and having a top surface opened; a lid member for closing the top surface opening of the terminal box so as to be openable and closable; A gasket for watertight sealing between the lid member and the opening edge of the terminal box, and a wiring fastener provided in the wiring lead-out portion on the side of the terminal box and in watertight pressure contact with the outer peripheral surface of the tube for binding the wires The terminal box is attached to the airtight container with the terminal placed in the through hole, and the gap between the perforation hole on the bottom and the airtight container is the sealing material. Because it is watertightly sealed, it is possible to reliably prevent water from entering the terminal.

In addition, it is difficult in the past to attach a watertight fastener to the wiring lead-out portion on the side of the terminal box and to press-contact the outer peripheral surface of the tube that binds the wires watertightly with this wiring fastener. Therefore, it is possible to reliably prevent water from entering from the wiring lead-out portion, and to improve water resistance. As a result, even if the electric compressor is used in a very severe environment where it is exposed to wind and rain from the side or directly underneath, the terminal will not get wet, so the problem of malfunction due to the terminal getting wet is surely eliminated. be able to. As a result, high reliability of the electric compressor can be ensured, and versatility can be improved.

In particular, the wiring fastener has a tube extending from the wiring lead-out portion on the side of the terminal box, and the base of this tube is connected to the terminal box in a watertight manner, and at the tip thereof, the outer periphery of the tube is watertight. The tube can be attached in a watertight manner at a position away from the terminal box.

According to the second aspect of the present invention, in the electric compressor provided with the terminal cover for covering the terminal for supplying power to the electric element housed in the hermetically sealed container, the terminal cover has a through hole on the bottom surface through which the terminal passes. A terminal box having a wiring lead-out portion for pulling out a wire electrically connected to the terminal on the side surface and having an open top surface; a lid member for closing the top surface opening of the terminal box so as to be openable and closable; A gasket for watertight sealing between the member and the opening edge of the terminal box, and a wiring fastener provided in the wiring lead-out portion on the side of the terminal box, and in watertight pressure contact with the outer peripheral surface of the tube for binding the wires, The terminal box is attached to the closed container with the terminal placed in the through hole, and the space between the peripheral hole of the bottom hole and the closed container is the sealing material. Because it is watertightly sealed Te, it is possible to reliably prevent water from entering the terminal.

In addition, it is difficult in the past to attach a watertight fastener to the wiring lead-out portion on the side of the terminal box and to press-contact the outer peripheral surface of the tube that binds the wires watertightly with this wiring fastener. Therefore, it is possible to reliably prevent water from entering from the wiring lead-out portion, and to improve water resistance. As a result, even if the electric compressor is used in a very severe environment where it is exposed to wind and rain from the side or directly below, the terminal will not get wet, so the problem of malfunction caused by the terminal getting wet can be reliably eliminated. be able to. As a result, high reliability of the electric compressor can be ensured, and versatility can be improved.

In particular, the wiring fastener has a flexible tube extending from the wiring lead-out portion on the side of the terminal box, and the wiring is inserted into the tube, and the outer periphery of the tube is watertight at the base of the tube. Therefore, the tube can be protected by a flexible tube extending from the wiring lead-out portion.

It is a vertical side view of the electric compressor of one Example to which the present invention is applied. It is a side view of the end cap of the electric compressor of FIG. It is the figure which looked at the end cap of FIG. 2 from the upper perspective. It is a vertical side view of the end cap and terminal cover of FIG. It is an exploded view of the terminal cover attached to the end cap of FIG. FIG. 6 is another exploded view of the terminal cover of FIG. 5. FIG. 6 is another exploded view of the terminal cover of FIG. 5. It is the figure which showed typically the state which attached the terminal cover and wiring. It is the figure which showed the attachment state of the other Example typically (Example 2). It is the figure which showed typically the attachment state of another other Example (Example 3).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a longitudinal side view of an electric compressor according to an embodiment to which the present invention is applied. The electric compressor 10 of the present embodiment is an internal high-pressure type rotary compressor (multi-cylinder rotary compressor) including first and second rotary compression elements 32 and 34. The rotary compressor 10 of the present embodiment includes an electric element 14 as a driving element disposed in an upper side of the internal space of the hermetic container 12 in a vertical cylindrical hermetic container 12 made of a steel plate, and the electric element 14. The first and second rotary compression elements 32 and 34 which are disposed on the lower side and are driven by the rotary shaft 16 of the electric element 14 are accommodated.

  The sealed container 12 includes a cylindrical container body 12A, a substantially bowl-shaped end cap (lid body) 12B that closes the upper opening of the container body 12A, and a substantially bowl-shaped end cap that closes the lower opening of the container body 12A. It is comprised with the bottom cap (bottom part) 12C. A circular mounting hole 12D (not shown in FIG. 1) is formed on the upper surface of the end cap 12B, and a terminal 20 (wiring shown in FIG. 1) for supplying power to the electric element 14 is provided in the mounting hole 12D. Is omitted). Further, a terminal box 72 of a terminal cover 70 described later is attached to the end cap 12B on the outer periphery of the terminal 20.

  Further, a refrigerant discharge pipe 96 is attached to the end cap 12 </ b> B, and one end of the refrigerant discharge pipe 96 communicates with the inside of the sealed container 12. On the other hand, a mounting base 13 is attached to the bottom of the bottom cap 12C.

  The electric element 14 includes a stator 22 that is welded and fixed in an annular shape along the inner peripheral surface of the upper space of the sealed container 12, and a rotor 24 that is inserted and installed inside the stator 22 with a slight gap. The rotor 24 is fixed to a rotary shaft 16 that extends in the vertical direction through the center.

  The stator 22 has a laminated body 26 in which donut-shaped electromagnetic steel plates are laminated, and a stator coil 28 wound around the teeth of the laminated body 26 by a direct winding (concentrated winding) method. The rotor 24 is also formed of a laminated body of electromagnetic steel plates like the stator 22.

  An intermediate partition plate 36 is sandwiched between the first rotary compression element 32 and the second rotary compression element 34. That is, the first rotary compression element 32 and the second rotary compression element 34 include an intermediate partition plate 36, first and second cylinders 38 and 40 disposed above and below the intermediate partition plate 36, and the first rotary compression element 32 and the second rotary compression element 34. The first and second cylinders 38 and 40 have first and second eccentric portions 42 and 44 formed on the rotary shaft 16 with a phase difference of 180 degrees and are eccentrically rotated in the cylinders 38 and 40, respectively. A second roller 46, 48, a vane (not shown) that abuts on each roller 46, 48 and divides the inside of each cylinder 38, 40 into a low pressure chamber side and a high pressure chamber side, an opening surface above the cylinder 38, The lower opening surface of the cylinder 40 is closed, and the upper support member 54 and the lower support member 56 are used as support members that also serve as bearings for the rotary shaft 16.

  The cylinders 38 and 40 are formed with suction passages 58 and 60 respectively communicating with the low pressure chambers inside the cylinders 38 and 40. The suction passages 58 and 60 have refrigerant introduction pipes 92 and 94, which will be described later. Are connected to each other.

  A discharge muffler chamber 62 is provided above the upper support member 54, and the refrigerant gas compressed by the cylinder 38 of the first rotary compression element 32 is discharged into the discharge muffler chamber 62. The discharge silencing chamber 62 has a hole through which the upper support member 54 that also serves as a bearing of the rotary shaft 16 and the rotary shaft 16 passes in the center, and covers the electric element 14 side (upper side) of the upper support member 54. It is formed in a bowl-shaped cup member 63.

  The lower side of the lower support member 56 is covered with a substantially bowl-shaped cup member 65 having a hole through which the lower support member 56 that also serves as a bearing for the rotary shaft 16 and the rotary shaft passes. A discharge silencer chamber 64 is provided inside. Then, the refrigerant gas compressed in the cylinder 40 of the second rotary compression element 34 is discharged into the discharge silencer chamber 64.

  A discharge hole 55 is formed in the upper support member 54 on the lower surface of the discharge silencer chamber 62 at a position corresponding to a discharge port (not shown) formed in the cylinder 38, and a position corresponding to the upper end opening of the discharge hole 55. A discharge valve (not shown) that closes the discharge hole 55 so as to be openable and closable is attached. Further, a backer valve 67 as a discharge valve restraining plate is disposed above the discharge valve, and is attached to the upper support member 54 by a caulking pin (not shown) together with the discharge valve.

  Then, the refrigerant gas on the high-pressure chamber side that is compressed in the cylinder 38 and reaches a predetermined pressure pushes up the discharge valve that closes the discharge hole 55 to open the upper end opening of the discharge hole 55. As a result, the high pressure chamber side of the cylinder 38 and the discharge silencer chamber 62 are communicated with each other via the discharge port and the discharge hole 55, and the high temperature and high pressure refrigerant gas in the cylinder 38 is discharged into the discharge silencer chamber 62. Become. When the discharge of the refrigerant gas ends, the discharge valve returns to the upper end opening of the discharge hole 55 and closes the discharge hole 55.

  Similarly, a discharge hole 57 is formed in the lower support member 56 on the upper surface of the discharge silencer chamber 64 at a position corresponding to a discharge port (not shown) formed in the cylinder 40. A discharge valve (not shown) that closes the discharge hole 57 so as to be openable and closable is attached to the corresponding position. Further, a backer valve 69 serving as a discharge valve holding plate is disposed below the discharge valve, and is attached to the lower support member 56 by a caulking pin (not shown) together with the discharge valve.

  Then, the refrigerant gas on the high pressure chamber side compressed in the cylinder 40 and reaching a predetermined pressure pushes the discharge valve closing the discharge hole 57 to open the lower end opening of the discharge hole 57. As a result, the high pressure chamber side of the cylinder 40 and the discharge muffler chamber 64 communicate with each other via a discharge port and a discharge hole 57 (not shown), and the high-temperature and high-pressure refrigerant gas in the cylinder 40 is discharged into the discharge muffler chamber 64. It will be. When the discharge of the refrigerant gas ends, the discharge valve returns to the lower end opening of the discharge hole 57 and closes the discharge hole 57.

  On the other hand, sleeves 141 and 142 are welded and fixed to the side surfaces of the container body 12A of the sealed container 12 at positions corresponding to the suction passages 58 and 60 of the cylinder 38 and the cylinder 40, respectively. These sleeves 141 and 142 are adjacent to each other in the vertical direction.

  One end of a refrigerant introduction pipe 92 for introducing refrigerant gas into the cylinder 38 is inserted and connected into the sleeve 141, and one end of the refrigerant introduction pipe 92 communicates with the suction passage 58 of the cylinder 38. The other end of the refrigerant introduction pipe 92 is opened in the accumulator 146.

  One end of a refrigerant introduction pipe 94 for introducing refrigerant gas into the cylinder 40 is inserted and connected into the sleeve 142, and one end of the refrigerant introduction pipe 94 communicates with the suction passage 60 of the cylinder 40. The other end of the refrigerant introduction pipe 94 is opened in the accumulator 146 in the same manner as the refrigerant introduction pipe 92.

  The accumulator 146 is a tank that performs gas-liquid separation of the suction refrigerant, and is attached to the upper side surface of the container body 12 </ b> A of the sealed container 12 via a bracket 147. A refrigerant introduction pipe 92 and a refrigerant introduction pipe 94 are inserted into the accumulator 146 from the bottom, and openings at the other ends are positioned above the accumulator 146, respectively.

  The discharge silencer chamber 64 and the discharge silencer chamber 62 are not shown in the drawing that penetrate through the vertical support members 54 and 56, the first and second cylinders 38 and 40, and the intermediate partition plate 36 in the axial direction (vertical direction). It communicates through a passage. Then, the high-temperature and high-pressure refrigerant gas compressed by the second rotary compression element 34 and discharged to the discharge muffler chamber 64 is discharged to the discharge muffler chamber 62 through the communication path, and the cylinder 38 of the first rotary compression element 32. It is configured to merge with the high-temperature and high-pressure refrigerant gas compressed inside.

  Further, the discharge silencing chamber 62 and the inside of the sealed container 12 are communicated with each other through a hole (not shown) penetrating the cup member 63, and the first rotary compression element 32 and the second rotary compression element 34 are compressed through this hole. The high temperature and high pressure refrigerant gas thus discharged is discharged into the sealed container 12.

  On the other hand, the terminal 20 described above includes a circular glass portion 21, a plurality of (three in this embodiment) conductive pins 19 as electrical elements attached so as to penetrate the glass portion 21, and a glass portion 21. It is comprised from 21 A of iron attachment parts which are formed in the circumference | surroundings and protruded diagonally outward and downward in the shape of a bowl.

  And this terminal 20 inserts the glass part 21 into the attachment hole 12D of the end cap 12B from the lower side, faces the upper side, and makes the attachment part 21A abut on the peripheral edge of the attachment hole 12D. The attachment portion 21A is welded to the peripheral edge of the attachment hole 12D to be fixed to the end cap 12B (FIG. 4). The terminal 20 located outside the sealed container 12 is covered with the terminal cover 70 of the present invention.

  Here, an embodiment of the terminal cover 70 of the present invention will be described in detail with reference to FIGS. 2 is a side view of the end cap 12B, FIG. 3 is a perspective view of the end cap 12B as viewed from above, FIG. 4 is a longitudinal side view of the end cap 12B and the terminal cover 70, and FIGS. FIG. 8 is an exploded view of the terminal cover 70, and FIG. 8 schematically shows a state in which the terminal cover 70 is attached to the end cap 12 and the wiring 90 is connected to the terminal 20.

  As shown in the drawings, the terminal cover 70 of this embodiment includes the terminal box 72, the lid member 76, the gasket 80 as a seal member, and the wiring fastener 85. The terminal box 72 has a bottom surface that partially contacts the upper surface of the end cap 12B and a side surface that stands up from the bottom surface, and has a box shape with an open top surface. A through hole 73 through which the terminal 20 passes is formed on the bottom surface of the terminal box 72 (FIGS. 4 and 5). The through-hole 73 is a circular hole formed slightly larger than the glass portion 21 of the terminal 20.

  On one side surface of the terminal box 72, a wiring lead-out portion 74 for drawing out the wiring 90 electrically connected to the terminal 20 is formed. The wiring lead-out portion 74 is a circular hole that penetrates one side surface of the terminal box 72. In addition, at the four corners above the outer periphery of the side surface of the terminal box 72, there are provided extending portions 75 extending outward in a direction orthogonal to the side surface of the terminal box 72. An attachment hole 75A for attaching 98 is formed through (FIGS. 5 to 7).

  The lid member 76 closes the top surface opening of the terminal box 72 so that it can be opened and closed. Specifically, the lid member 76 is formed of a plate-like member larger than the area of the top surface opening of the terminal box 72, and a groove 77 corresponding to the opening edge 72T of the terminal box 72 is formed on the lower surface. (FIG. 6).

  Then, by attaching the gasket 80 to the groove 77 of the lid member 76 and inserting the opening edge 72T of the terminal box 72 into the groove 77, the top surface opening of the terminal box 72 is closed by the lid member 76. It becomes. In this embodiment, a groove 77 corresponding to the opening edge 72T of the terminal box 72 is formed on the lower surface of the lid member 76, and a gasket 80 is attached to the groove 77 so that the opening edge 72T of the terminal box 72 is attached to the opening edge 72T. Although the gap between the lid member 76 and the opening edge 72T of the terminal box 72 is hermetically sealed by being inserted into the groove 77, the present invention is not limited to the specification of this embodiment. For example, without forming the groove 77 on the lower surface of the lid member 76 as in this embodiment, a gasket is attached to the entire lid member 76, and the gap between the lid member 76 and the opening edge 72T of the terminal box 72 is watertight by this gasket. The present invention is also effective as a structure that seals automatically. Alternatively, a step for positioning with the terminal box 72 may be provided on the lower surface (bottom surface) of the lid member 76, and a gasket may be attached only to a portion where the step and the terminal box 72 (opening edge 72T) are in contact with each other. The present invention is effective.

  Further, when the lid member 76 is attached to the top opening of the terminal box 72, it corresponds to the four attachment holes 75A formed outside the groove 77 and in the extending portion 75 of the terminal box 72. Mounting holes 78 are formed at the positions so as to penetrate the lid member 76 in the vertical direction. The mounting holes 75A and 78 are for fixing the terminal box 72 and the lid member 76 with screws 98.

  On the other hand, a wiring fastener 85 is provided on the wiring lead-out portion 74 formed on one side surface of the terminal box 72. The wiring fastener 85 is located on the outer peripheral surface of a tube (capty cable or the like) 91 inserted into the wiring lead-out portion 74 and is used for watertight pressure-contacting the outer peripheral surface of the tube 91. The tube 91 is for binding the wirings 90, and a plurality of wirings 90 are converged in the tube 91. The wiring fastener 85 of the present embodiment is constituted by a straight short tube (metal tube) having a fastening portion 87 for fastening the tube 91 to one end 85A. A thread groove (not shown) for attaching a nut 89 is formed on the outer periphery of the other end 86B of the tubular body, and a convex projection 88 larger than the diameter of the wiring lead-out portion 74 is formed at the center of the tubular body. Is formed.

  In order to attach the wiring fastener 85 to the wiring lead-out portion 74, first, the gasket 81 is attached (closely attached) to the surface of the projection 88 on the tube other end 86B side, and then the other of the tube. The end 86 </ b> B is inserted into the wiring lead-out portion 74 from the outside of the terminal box 72, and the surface opposite to the surface that contacts the protrusion 88 of the gasket 81 is brought into contact with the side surface of the terminal box 72. In this state, a nut 89 is inserted into the outer periphery of the other end 68B protruding into the terminal box 72, and is screwed together with the thread groove of the other end 86B of the tubular body, whereby the wiring fastener 85 is connected to the terminal box. 72 wiring lead-out portions 74 can be attached. As a result, the gasket 81 is sandwiched between the protrusion 88 and the side surface of the terminal box 72, and the gasket 81 is configured to seal the space between the wiring fastener 85 and the wiring lead-out portion 74 in a watertight manner.

  In each figure, reference numeral 84 denotes a connector block for converging a plurality of wires 90 and connecting them to each conductive pin 19 of the terminal 20.

  A method of attaching the terminal cover 70 will be described with the above configuration. First, the terminal 20 is inserted into the through hole 73 of the terminal box 72 and attached to the upper surface of the end cap 12B. Specifically, a plurality of portions where the bottom surface of the terminal box 72 and the top surface of the end cap 12B are in contact with each other so that the center of the glass portion 21 of the terminal 20 and the center of the through hole 73 are aligned. It is fixed by welding (spot welding, etc.).

  At this time, since a gap is formed in the radial direction between the periphery of the through-hole 73 and the glass portion 21, the gap is sealed in a watertight manner by a sealant 82 such as a sealant. Next, the wiring fastener 85 is attached to the wiring lead-out portion 74. Specifically, as described above, the gasket 81 is inserted into the outer periphery of the tubular body from the other end 86B and attached to the surface of the protruding portion 88 on the tubular body other end 86B side. Next, the other end 86 </ b> B is inserted into the wiring lead-out portion 74 from the outside of the terminal box 72, and the surface opposite to the surface that contacts the protrusion 88 of the gasket 81 is brought into contact with the side surface of the terminal box 72. In this state, a nut 89 is inserted into the outer periphery of the other end 86B protruding into the terminal box 72, and a screw groove formed on the outer periphery of the other end 86B of the tube body and a screw groove (not shown) formed on the inner surface of the nut 89 are inserted. Screw the mountain). Thereby, the wiring fastener 85 can be attached to the wiring drawing part 74 of the terminal box 72 in a watertight manner as described above.

  Next, the connector block 84 is attached to the terminal 20. Specifically, the conductive pins 19 and 19 of the terminal 20 are inserted into the holes formed in the connector block 84, and the wiring holding portion 84A of the connector block 84 is on the wiring lead-out portion 74 side. The connector block 84 is attached so as to cover the terminal 20.

  Then, the distal end of the tube 91 in which the plurality of wires 90 are bundled is inserted into the tubular body of the wiring fastener 85 from one end 86A, and the distal end of the tube 91 is protruded from the other end 86B. The outer peripheral surface of the tube 91 is tightened by the portion 87. Thereby, the outer peripheral surface of the tube 91 can be press-contacted in the tubular body of the wiring fastener 85. Then, after connecting the tips of the wires 90 extending from the tips of the tubes 91 to the respective conductive pins 19, 19, intermediate portions of the wires 90 extending from the tips of the tubes 91 are connected to the wire holding portions of the connector block 84. 84A is housed. Thereby, the attachment work of the wiring 90 to each conductive pin 19 of the terminal 20 is completed.

  Finally, the opening edge 72T on the top surface of the terminal box 72 is closed by the lid member 76. Specifically, first, the gasket 80 is attached in the groove 77 formed on the lower surface of the lid member 76. Next, alignment is performed so that the opening edge 72T of the terminal box 72 corresponds to the groove 77, and the lid member 76 is placed on the terminal box 72 from above. At this time, since each attachment hole 78 of the lid member 76 is in a state corresponding to each attachment hole 75A of the terminal box, a screw 98 is inserted from the upper surface of the lid member 76 and is screwed. Thereby, the lid member 76 can be attached to the terminal box 72 and the top surface opening of the terminal box 72 can be closed by the lid member 76 so as to be opened and closed. In particular, the gasket 80 is interposed between the lid member 76 and the top surface opening of the terminal box 72, so that the space between the opening edges of the terminal box can be sealed in a watertight manner.

  As described in detail above, the gap between the lid member 76 and the opening edge 72T of the terminal box 72 is watertightly sealed with the gasket 80 as in the present invention, and the periphery of the through hole 73 on the bottom and the end cap 12 of the sealed container 12 are sealed. A tube 91 for watertight sealing with a material 82 and attaching a wiring fastening tool 85 to the wiring lead-out portion 84 on the side surface of the terminal box 72 via the gasket 82 and binding the wiring 90 by the wiring fastening tool 85. As a result, the water intrusion into the terminal 20 located outside the sealed container 12 can be reliably prevented.

  In particular, a wiring fastening tool 85 is provided on the wiring lead-out portion 74 on the side surface of the terminal box 72 via a gasket 81, and the outer peripheral surface of the tube that binds the wiring 90 with the wiring fastening tool 85 is watertightly pressed. By doing so, it becomes possible to reliably prevent the entry of water from the wiring lead-out portion 74, which has been difficult in the past, and to improve the water resistance. As a result, even if the electric compressor is used in a very severe environment where it is exposed to wind and rain from right side or directly below, the terminal 20 does not get wet, so that the inconvenience of failure can be prevented. As a result, high reliability of the electric compressor can be ensured, and versatility can be improved.

  In the first embodiment, the wiring fastener 85 is constituted by a straight short tube (metal tube) located in the wiring lead-out portion 74. However, the wiring fastener 85 of the present invention is Any structure can be used as long as it is positioned on the outer peripheral surface of a tube (capty cable or the like) 91 inserted into the wiring lead-out portion 74 and can press-contact the outer peripheral surface of the tube 91 in a watertight manner. Is not to be done. For example, as shown in FIG. 9, the wiring fastener 100 may have a tube body 101 that extends from the wiring lead-out portion 74 on the side surface of the terminal box 72. In the present embodiment, the structure is the same as that of the first embodiment except for the structure of the wiring fastener 100 described below. Also, the same reference numerals as those in the first embodiment are the same as or similar to those described in the first embodiment, and the description thereof is omitted here.

  Specifically, the wiring fastener 100 according to the present embodiment will be described. The wiring fastener 100 extends from the wiring lead-out portion 74 on the side surface of the terminal box 72 and bends to one side (downward in FIG. 9). The tube 101 is made of metal or resin (made of metal in this embodiment). In the present embodiment, a thread groove (not shown) for attaching the nut 89 is formed on the outer periphery of the base portion 100 </ b> A of the tube body 101 attached to the wiring lead-out portion 74. A protruding portion 88 that is larger than the diameter of the wiring lead-out portion 74 is formed on the base portion 100A that is closer to the tip end 100B than the screw groove.

  Then, in order to attach the base portion 100A of the tube body 101 to the side surface of the terminal box 72, the gasket 81 is attached (adhered to) the side surface of the surface of the projection 88 where the thread groove is formed, as in the previous embodiment. Thereafter, the base portion 100 </ b> A is inserted into the wiring lead-out portion 74 from the outside of the terminal box 72, and the surface opposite to the surface that contacts the protrusion 88 of the gasket 81 is brought into contact with the side surface of the terminal box 72. In this state, a nut 89 is inserted into the outer periphery of the base portion 100A protruding into the terminal box 72, and is screwed together with a screw groove formed on the outer periphery of the base portion 100A. Thereby, the base portion 100 </ b> A of the tube body 101 of the wiring fastener 100 is attached to the terminal box 72. At this time, since the gasket 81 is interposed between the protrusion 88 and the side surface of the terminal box 72, the gasket 81 provides watertightness between the tube 101 of the wiring fastener 100 and the wiring lead-out portion 74. Can be sealed.

  On the other hand, a fastening portion 87 similar to the above embodiment is attached to the distal end 100B of the tube body 101 of the wiring fastener 100. For this reason, the distal end of the tube 91 is inserted into the tube body 101 of the wiring fastener 100 from the distal end 100B, and the distal end of the tube 91 is positioned in the middle of the tube body 101 by the tightening portion 87. By tightening the outer peripheral surface of the tube 91, the outer peripheral surface of the tube 91 can be watertightly pressed into the tube body 101 of the wiring fastener 100 at the distal end 100B.

  Also in the configuration of the present embodiment described above, similarly to the first embodiment, it is possible to reliably prevent water from entering from the wiring lead-out portion 74 and to improve water resistance. In particular, as in this embodiment, it has a tube 101 body extending from the wiring lead-out portion 74 on the side surface of the terminal box 72, and the base portion 100A of this tube body is watertightly connected to the terminal box 72, and at its tip 101B A structure in which the tube 91 can be attached in a watertight manner at a position away from the terminal box 72 by being in watertight pressure contact with the outer peripheral surface of the tube 91, and a structure in which water is less likely to enter than in the structure of the first embodiment. It can be.

  Further, as shown in FIG. 10, the tube body of the wiring tightening portion 105 extending from the wiring lead-out portion 74 on the side surface of the terminal box 72 is a flexible tube body 106, and the wiring 90 is placed in the tube body 106. There may be a configuration in which the base portion 105A of the tube body 106 is inserted into the outer peripheral surface of the tube 91 in a watertight manner.

  Specifically, the wiring fastener 105 shown in FIG. 10 includes a flexible tube 106 that extends from the wiring lead-out portion 74 on the side surface of the terminal box 72 and bends in one direction (downward in FIG. 10). . In this embodiment, a thread groove (not shown) for attaching a nut 89 is formed on the outer periphery of the base portion 105A of the tube body 106 attached to the wiring lead-out portion 74. A protruding portion 88 that is larger than the diameter of the wiring lead-out portion 74 is formed on the base portion 105A that is closer to the tip end 105B than the screw groove. In this case, the method of attaching the base portion 105A of the tube body 106 is the same as the method of attaching the base portion 100A of the tube body 101 of the second embodiment, and thus the description thereof is omitted.

  On the other hand, as in the above embodiment, the tightening portion 87 is not provided at the distal end 105B of the tube body 106, but is provided at the base portion 105A. In this embodiment, a tightening portion 87 is provided adjacent to the tip 105B side of the protrusion 88. With such a configuration, the distal end of the tube 91 is inserted into the tube body 106 from the distal end 105B, the distal end of the tube 91 is projected from the base portion 105A, and is projected into the terminal box 72. Tighten the outer surface. Thereby, the outer peripheral surface of the tube 91 can be press-contacted in the base part 105A of the tubular body 106.

  As described above, also in the configuration of the present embodiment, it is possible to reliably prevent water from entering from the wiring lead-out portion as in each of the embodiments described above, and to improve water resistance. In particular, as in this embodiment, a flexible tube 106 extending from the wiring lead-out portion 74 on the side surface of the terminal box 72 is provided, and a tube 91 (wiring 90) is inserted into the tube 106 so that the base portion Since the tube body 106 is in watertight pressure contact with the outer peripheral surface of the tube 91 in 105A, the opening of the distal end 105B is located at a position further extended from the pressure-contacted base portion 105A. It is possible to make the structure difficult to penetrate. Moreover, it becomes possible to protect the tube 91 by making the tubular body 106 extending from the wiring lead-out portion 84 flexible.

DESCRIPTION OF SYMBOLS 10 Electric compressor 12 Sealed container 12A Container main body 12B End cap 12D Mounting hole 14 Electric element 16 Rotating shaft 19 Conductive pin 20 Terminal 21 Glass part 21A Mounting part 22 Stator 24 Rotor 26 Laminated body 28 Stator coil 32 1st rotational compression element 34 Second rotary compression element 38, 40 Cylinder 42, 44 Eccentric part 46, 48 Roller 54, 56 Support member 58, 60 Suction passage 62, 64 Discharge silencer 70 Terminal cover 72 Terminal box 73 Through hole 74 Wiring lead part 75 Extension part 75A Mounting hole 76 Lid member 77 Groove 78 Mounting hole 80, 81 Gasket 82 Sealant (sealant)
84 Connector block 85 Wiring clamp 86 Clamping tube 86A One end 86B Other end 87 Tightening portion 88 Protruding portion 89 Nut 90 Wiring 91 Tube 92, 94 Refrigerant introduction tube 96 Refrigerant discharge tube 98 Screw 146 Accumulator

Claims (2)

In the electric compressor provided with a terminal cover covering the terminal for supplying power to the electric element housed in the hermetic container,
The terminal cover has a through-hole through which the terminal passes on a bottom surface, a terminal box having a wiring lead-out portion on a side surface for drawing out a wire electrically connected to the terminal, and an open top surface; and the terminal A lid member that closes the top opening of the box so that it can be opened and closed; a gasket that seals water tightly between the lid member and the opening edge of the terminal box; and a wiring lead-out portion on the side of the terminal box. A wiring fastener that is watertightly pressed against the outer peripheral surface of the tube to be bundled;
The terminal box is attached to the airtight container in a state where the terminal is disposed in the through hole, and the space between the through hole periphery of the bottom surface and the airtight container is sealed watertight with a sealing material ,
The wiring fastener has a tube extending from a wiring lead-out portion on the side of the terminal box, and a base of the tube is connected to the terminal box in a watertight manner, and at the tip thereof, the outer periphery of the tube An electric compressor characterized by being watertightly pressed . In the electric compressor provided with a terminal cover covering the terminal for supplying power to the electric element housed in the hermetic container,
The terminal cover has a through-hole through which the terminal passes on a bottom surface, a terminal box having a wiring lead-out portion on a side surface for drawing out a wire electrically connected to the terminal, and an open top surface; and the terminal A lid member that closes the top opening of the box so that it can be opened and closed; a gasket that seals water tightly between the lid member and the opening edge of the terminal box; and a wiring lead-out portion on the side of the terminal box. A wiring fastener that is watertightly pressed against the outer peripheral surface of the tube to be bundled;
The terminal box is attached to the airtight container in a state where the terminal is disposed in the through hole, and the space between the through hole periphery of the bottom surface and the airtight container is sealed watertight with a sealing material,
The wiring fastener has a flexible tubular body extending from a wiring lead-out portion on the side of the terminal box, and the wiring is inserted into the tubular body, and on the outer peripheral surface of the tube at the base of the tubular body. An electric compressor characterized by being watertightly pressed.

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