JP5232543B2 - Electric compressor - Google Patents

Description

  In the present invention, an electric motor and a refrigerant compression unit driven by the motor are housed in a vertically long cylindrical sealed container whose outer surface is heat-resistant coated, and a base member for mounting to other equipment is provided on the bottom surface of the sealed container. In particular, the present invention relates to a technique for attenuating vibration propagating from the sealed container to the base member.

There is an anti-vibration support device for a compressor mounted on an air conditioner or the like. This configuration has fixed legs that are uniformly distributed below the rotary compressor body, and is attached to the substrate via vibration-proof rubber attached to through holes provided in the fixed legs. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 10-38027

  The technique of this patent document 1 is characterized by the structure of the anti-vibration rubber employed when attaching the four fixed legs below the compressor to a substrate such as an air conditioner, thereby causing the operation of the compressor. It attenuates vibration and noise.

  However, since the anti-vibration measures at the compressor mounting portion are technologies that are performed by the customer who purchases and installs the compressor, it varies depending on the state of the device to which the compressor is mounted and the form of the mounting portion. Measures must be taken, which is a troublesome measure.

  In view of these points, the present invention is designed to take measures for vibration damping on the compressor side, and is provided at the bottom of the compressor in order to attach the compressor to other equipment such as an air conditioner. By reducing the vibration propagation to the base member, even if the anti-vibration measures to be performed on the customer side as purchased and installed in the compressor are simplified as in Patent Document 1, sufficient anti-vibration / noise measures can be taken. It is to provide.

In the electric compressor of the present invention, an electric motor and a refrigerant compression unit driven by the electric motor are housed in a vertically-cylindrical sealed container whose outer surface is heat-resistant coated, and a base member for mounting to another device is attached to the sealed container. In the electric compressor that is provided in the bottom surface portion and the motor has a rotation speed variable by inverter control, the sealed container has a bottom surface portion that protrudes in a spherical shape downward, and the base member has a central portion of the bottom surface portion. A bottom support portion having a circular support hole that penetrates, a plurality of mounting legs extending from the bottom support portion to the outside of the sealed container at substantially equal angular intervals, and substantially concentric circles on the mounting legs. A mounting hole for the other device is provided on the circumference, and the bottom support portion is spot welded to the bottom surface portion at the periphery of the circular support hole corresponding to the mounting leg portion, and the base member is sealed. Take in a container Vignetting, wherein in a state in which the outer surface of the closed container and the base member are the heat-resistant paint, wherein the circumferential surface of the spherical bottom part of the sealed container and the gap between the bottom surface support portion heat painted the same quality of paint poured An elastic filling layer having elasticity that attenuates vibration propagation from the sealed container to the base member is formed in a state of filling the entire circumference of the gap with the dried steady state paint .

  In the present invention, the gap between the peripheral surface of the spherical bottom surface portion and the bottom surface support portion of the sealed container is filled with a paint of the same material as the heat-resistant coating on the outer surface of the sealed container to form an elastic filling layer, Even if a configuration in which the mounting base member and the bottom portion of the sealed container are spot-welded is adopted, vibration transmitted from the sealed container to the mounting base member can be sufficiently damped. It is possible to provide a motor-driven compressor capable of simplifying the vibration-proof structure considered when being attached to other equipment via the device, and easily reducing vibration and noise in other equipment to which the base member is attached. It becomes.

  In addition, since the elastic filling layer is made of a paint of the same material as the heat resistant coating on the outer surface of the sealed container, the workability is improved and the cost is reduced as compared with the case where an elastic material such as putty or molded rubber is filled. The vibration absorption is improved because of good adhesion to the heat-resistant coating on the outer surface of the sealed container. Moreover, since the bottom support part is spot-welded with the bottom part of the sealed container at the periphery of the circular support hole, the mounting base member is welded to the entire edge part of the circular support hole and the bottom part of the sealed container. The workability is improved and the cost can be reduced as compared with the above, and the cost of the electric compressor can be reduced by simplifying the shape of the mounting base member.

In the electric compressor of the present invention, an electric motor and a refrigerant compression unit driven by the electric motor are housed in a vertically-cylindrical sealed container whose outer surface is heat-resistant coated, and a base member for mounting to another device is attached to the sealed container. In the electric compressor that is provided in the bottom surface portion and the motor has a rotation speed variable by inverter control, the sealed container has a bottom surface portion that protrudes in a spherical shape downward, and the base member has a central portion of the bottom surface portion. A bottom support portion having a circular support hole that penetrates, a plurality of mounting legs extending from the bottom support portion to the outside of the sealed container at substantially equal angular intervals, and substantially concentric circles on the mounting legs. A mounting hole for the other device is provided on the circumference, and the bottom support portion is spot welded to the bottom surface portion at the periphery of the circular support hole corresponding to the mounting leg portion, and the base member is sealed. Take in a container Vignetting, wherein in a state in which the outer surface of the closed container and the base member is the heat-resistant paint, wherein the circumferential surface of the spherical bottom part of the sealed container and the gap between the bottom surface support portion heat-resistant paint of the same quality of paint poured An elastic filling layer having elasticity that attenuates vibration propagation from the closed container to the base member by the dried steady state paint is formed so as to fill the entire circumference of the gap . Examples are described below.

  FIG. 1 is a longitudinal side view showing the configuration of an electric compressor according to the present invention, FIG. 2 is a bottom view of the electric compressor according to the present invention as viewed from below a base member for mounting to another device, and FIG. FIG. 4 is a longitudinal side view showing a connection state between a bottom surface portion of a hermetic container and a base member of an electric compressor according to the present invention. FIG. 4 shows an elastic gap between the bottom surface portion of the hermetic container and the base member of the electric compressor according to the present invention. It is a vertical side view which shows the state filled with the filling layer.

  FIG. 1 shows a cross section of the configuration of an electric compressor 1 according to the present invention. The electric compressor 1 includes an electric motor M and a refrigerant compression part P driven by the electric motor M in a vertically long cylindrical metal sealed container 2, and is a base member for attachment to other devices such as a refrigerator and an air conditioner 3 is provided on the bottom surface 2T of the sealed container 2. The electric motor M is composed of a stator M1 having a coil M11 and a rotor M2 that rotates in the stator M1, and the refrigerant compressor P is compressed by the rotation of a rotating shaft M3 attached to the rotor M2. . The electric motor M is operation-controlled by the electric power supplied through the terminal part 15 provided in the top part of the airtight container 2, and the control part (not shown) provided in the exterior of the electric compressor 1 is said other thing. Based on the detection of a temperature sensor provided in the device, the power supplied through the terminal unit 15 is inverter-controlled to vary the rotation speed of the electric motor M.

  The refrigerant compression part P is a two-stage compression mechanism, and the first-stage compression mechanism sucks low-pressure gas refrigerant into the cylinder 5A through the suction pipe 4 from an evaporator (not shown) of the external refrigerant circuit, and enters the rotating shaft M3. The configuration is such that the gas refrigerant is compressed to an intermediate pressure by the rotation of the attached rotary rotor 5B, and this intermediate pressure gas refrigerant passes through the connecting pipe 8 from the muffler chamber 7 of the lower support member 6 that supports the rotation shaft M3. It is compressed by the eye compression mechanism. The second stage compression mechanism is configured to suck intermediate pressure gas refrigerant into the cylinder 9A through the connecting pipe 8 and compress the gas refrigerant to a high pressure by rotation of the rotary rotor 9B attached to the rotation shaft M3. Is discharged into the sealed container 2 from the discharge port 12 of the muffler chamber 11 of the upper support member 10 that pivotally supports the rotation shaft M3, rises in the motor M portion, and is discharged from the discharge pipe 13 to the condenser (see FIG. (Not shown).

  In the sealed container 2, an upper lid 2B and a lower lid 2C are fitted to the upper and lower ends of the container main body 2A so as to close the upper and lower openings of the vertically long cylindrical container main body 2A, and a coupling portion between the container main body 2A and the upper lid 2B. And the coupling | bond part of 2 A of container main bodies and the lower cover 2C is couple | bonded by welding parts 14A and 14B by electric welding over the perimeter, and the airtight container 2 is formed.

  The upper lid 2B has a shape projecting upward in a spherical shape, and the lower lid 2C projects downward in a spherical shape to form the bottom surface portion 2T of the sealed container 2. The base member 3 for attachment to other devices such as a refrigerator and an air conditioner includes a bottom surface support portion 3A having a circular support hole 3H into which the central portion of the bottom surface portion 2T enters, and a sealed container 2 from the bottom surface support portion 3A. A plurality of mounting legs 3B extending outward at substantially equal angular intervals, and each mounting leg 3B is connected to the electric compressor 1 on a substantially concentric circumference centered on a circular support hole 3H. An attachment hole 3C for attaching to the other device is provided, and when the electric compressor 1 is attached to the other device via the attachment hole 3C, the electric compressor 1 can be supported substantially evenly. The illustrated one shows a form in which the mounting legs 3B are arranged at intervals of approximately 120 degrees.

  In the base member 3, the base member 3 is attached to the sealed container 2 by spot-welding the bottom support part 3 </ b> A to the bottom part 2 </ b> T of the sealed container 2 at the periphery of the circular support hole 3 </ b> H. The illustrated one shows an equivalent form in which spot welding 16 is performed at two locations around the circular support hole 3H corresponding to each mounting leg 3B.

  In a state where the electric motor M and the refrigerant compression part P are housed in the sealed container 2 to which the base member 3 is attached by spot welding 16, the outer surfaces of the sealed container 2 and the base member 3 are coated with a coating device (not shown). Painted heat resistant. When the electric compressor 1 uses CO2 as a refrigerant, the inside of the sealed container 2 becomes high pressure and high temperature due to operation, and the outer surface temperature of the sealed container 2 becomes 80 ° C. or higher. Of course, heat resistance that can withstand temperature, light resistance, and with little secular change is adopted. For this purpose, a specially modified phthalic acid resin-based paint is used, and as a preferable one, favorable results are obtained by adopting the trade name “One Coat Enamel 200 Black” of Kansai Paint Co., Ltd.

  Inverter control of the electric motor M of the electric compressor 1 is performed by varying the operating frequency. In this case, vibration is propagated due to the influence of the carrier frequency of the inverter, and this vibration is transmitted through the sealed container 2 to the base member 3. The noise is transmitted to other devices such as a refrigerator and an air conditioner to which the base member 3 is attached. In order to suppress this, in the present invention, as described above, the base member 3 is spot-welded to the hermetic container 2, and the outer surface of the hermetic container 2 and the base member 3 is heat-resistant coated, and the spherical surface of the hermetic container 2. A gap G between the peripheral surface of the bottom surface portion 2T and the bottom surface support portion 3A is filled with a paint having the same quality as the heat-resistant coating, and is dried to a predetermined stable state. This drying may be natural drying, but can be stabilized in a short time by forced drying in a heating furnace.

  Since the paint filled in the gap G has a predetermined viscosity, the paint can be easily poured into the gap G by moving the nozzle at the tip of the container containing the paint along the gap G. In addition, since this paint is quick-drying, it takes a short time to reach a dry steady state (predetermined stable state), and it is rich in mass productivity. The filled paint constitutes an elastic packed layer 20 having elasticity in a steady state (predetermined stable state), and the entire gap G between the peripheral surface of the bottom surface portion 2T of the sealed container 2 and the bottom surface support portion 3A. The circumference is filled with the elastic filling layer 20.

  As described above, the entire circumference of the gap G between the peripheral surface of the bottom surface portion 2T and the bottom surface support portion 3A of the sealed container 2 is filled with the elastic filling layer 20, so that vibration propagation from the sealed container 2 to the base member 3 is prevented. It is attenuated by the elastic filling layer 20. For this reason, the attachment structure in the case of attaching the base member 3 to another apparatus is also simplified.

  Even when the bottom surface portion 2T of the sealed container 2 and the base member 3 are electrically welded around the entire circumference of the circular support hole 3H of the base member 3, vibration of the base member 3 occurs, so that the bottom surface portion 2T of the sealed container 2 When the base member 3 is arc-welded, the vibration propagation from the sealed container 2 to the base member 3 cannot be attenuated, and the shape of the anti-vibration rubber employed when the base member 3 is attached to other equipment, It will be necessary to take anti-vibration measures in the configuration. However, in the present invention, vibration propagation from the sealed container 2 to the base member 3 can be damped, so that the attachment structure when the base member 3 is attached to another device is also simplified.

  In the present invention, the configuration of the electric compressor 1, the configuration of the base member 3, and the like are not limited to the above-described embodiment, and various modifications can be considered without departing from the technical scope of the present invention, and include various embodiments. To do.

It is a vertical side view which shows the structure of the electric compressor which concerns on this invention. It is the bottom view seen from the lower part of the base member for attaching the electric compressor concerning the present invention to other equipment. It is a vertical side view which shows the connection state of the bottom face part and base member of the airtight container of the electric compressor which concerns on this invention. It is a vertical side view which shows the state by which the clearance gap between the bottom face part of the airtight container of the electric compressor which concerns on this invention, and the coupling | bond part of a base member was filled up with the elastic filling layer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 .... Electric compressor 2 .... Sealed container 2T ... Bottom face part of sealed container 3 .... Base member 3A ... Bottom support part 3B ... Mounting leg part 3C ... Attachment Hole 3H ... Circular support hole 14A ... Welding part 14B ... Welding part 16 ... Spot welding M ... Electric motor P ... Refrigerant compression part

Claims (1)

An electric motor and a refrigerant compression unit driven by the electric motor are housed in a vertically long cylindrical sealed container whose outer surface is heat-resistant coated, and a base member for attachment to another device is provided on the bottom surface of the sealed container. In the electric compressor whose rotation speed is variable by inverter control, the hermetic container has a bottom surface portion that protrudes downward in a spherical shape, and the base member forms a circular support hole into which a central portion of the bottom surface portion enters. A plurality of mounting legs extending from the bottom support to the outside of the sealed container at substantially equal angular intervals, and each mounting leg is connected to the other device on a substantially concentric circumference. of a mounting hole, wherein the bottom supporting part in corresponding to the mounting legs periphery of the circular support hole is spot welded to the bottom portion base member attached to the sealed container, the sealed container In a state in which the outer surface of said base member is a heat-resistant paint, wherein the circumferential surface of the spherical bottom part of the sealed container and the gap between the bottom surface support portion heat-resistant paint of the same quality of paint is poured, dried steady state An electric compressor characterized in that an elastic filling layer having elasticity for attenuating vibration propagation from the sealed container to the base member by the paint is formed so as to fill the entire circumference of the gap .

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