JP6431421B2 - Electric compressor - Google Patents

Description

  The present invention relates to an electric compressor used in a refrigeration air conditioner or the like, and more particularly to an electric compressor having an accumulator.

  2. Description of the Related Art Conventionally, there is an electric compressor used in a refrigeration air conditioner or the like in which a sealed container and an accumulator are joined with a plate-like member (for example, see Patent Document 1). An airtight container is a container which accommodates an electric motor and the compression mechanism part driven with the electric motor. The accumulator is a container that stores a refrigerant to be supplied to a refrigeration unit of a refrigerating and air-conditioning apparatus in a pressurized state. A part of the plate-like member is welded and fixed to the outer peripheral surface of the closed container, and another part is welded and fixed to the outer peripheral surface of the accumulator.

  Hereinafter, the joint portion between the outer peripheral surface of the sealed container and the plate-like member that is fixed by welding is referred to as a “container-side joint portion”. Further, the joint portion between the outer peripheral surface of the accumulator and the plate-like member that is fixed by welding is referred to as an “accumulator-side joint portion”.

  In the electric compressor, the plate-like member and the accumulator are welded and fixed by a welding material stacked (installed) along the end surface of the edge portion of the accumulator-side joint portion of the plate-like member.

  In such a configuration, in the electric compressor, the compression mechanism portion serves as a vibration generation source, and the vibration of the compression mechanism portion propagates from the sealed container to the accumulator via the plate-like member. Therefore, the electric compressor is configured to reduce the vibration of the compression mechanism that propagates from the sealed container to the accumulator by increasing the rigidity of the accumulator.

JP 2011-127463 A

  However, the conventional electric compressor has a problem that noise may be increased as described below.

  For example, in a conventional electric compressor, the shape of the edge portion of the accumulator side joint of the plate-like member is linear when viewed from the side. Therefore, the conventional electric compressor has a configuration in which the plate-like member and the welding material are welded and fixed in a linear line contact state in a side view. Moreover, in the conventional electric compressor, the accumulator and the welding material are configured to be welded and fixed only at the outer side portion than the edge portion of the accumulator side joint portion of the plate-like member. In such a conventional electric compressor, the welding area between the plate-like member and the welding material is small. Further, the welding area between the accumulator and the welding material is also small. And in the conventional electric compressor, since the shape of the edge part of the accumulator side joint part of a plate-shaped member is linear when viewed from the side, variations in welding positions occur (that is, welding between the plate-shaped member and the welded plate). In some cases, the material is partially separated and welded in a point contact state.

  For this reason, in conventional electric compressors, variations in welding strength are likely to occur. Such a variation in welding strength is likely to occur in all electric compressors. That is, variations in welding strength are likely to occur not only in a single cylinder rotary compressor, but also in a multiple cylinder rotary compressor, scroll compressor, and the like.

  Such a conventional electric compressor is likely to cause a variation in welding strength, and therefore the vibration of the compression mechanism that propagates from the sealed container to the accumulator cannot be sufficiently reduced, resulting in increased noise. was there. In addition, the refrigeration and air-conditioning equipment sometimes increases noise by mounting a conventional electric compressor.

  In a conventional electric compressor, in order to reduce noise, a cushioning material such as rubber is sandwiched between the accumulator side joint portion of the plate-like member and the outer peripheral surface of the accumulator, and fastened with a band and a screw. Has been tried. However, this configuration has led to an increase in the number of parts and cost.

  Moreover, in the conventional electric compressor, in order to reduce noise, an attempt has been made to increase the rigidity by increasing the plate thickness of the plate-like member and the dimensions of the parts. However, this configuration has caused an increase in cost and weight.

  The present invention has been made to solve the above-described problems, and has as its main object to provide an electric compressor with a relatively inexpensive configuration and reduced noise.

In order to achieve the above object, the present invention provides an electric compressor, an airtight container containing therein an electric motor and a compression mechanism portion driven by the electric motor, an accumulator, the airtight container, and the accumulator. And the accumulator includes an upper housing and a lower housing, and the fitting portion with which the upper housing and the lower housing are fitted has a different diameter. The joint member has a container-side joint portion joined to the sealed container and an accumulator-side joint portion joined to the accumulator, the accumulator-side joint portion. , together has a shape notch is formed toward the inner portion from the edge portion, the outer peripheral surface of the notch portion lower portion and said accumulator than the upper portion the notch than And a shape curved in the opposite side that faces, a configuration that is fixed by welding to the fitting portion of the accumulator at least the notch.
Other means will be described later.

  The accumulator side joint portion of this electric compressor has a shape in which a notch is formed, and is welded and fixed to the accumulator with a welding material stacked from the inside of the notch to the outside of the edge portion. This electric compressor simultaneously increases both the welded area between the plate-like member and the welded material and the welded area between the accumulator and the welded material with the welded material that extends from the inside of the notch portion to the outside of the edge portion. be able to. Therefore, this electric compressor can improve welding strength with a relatively inexpensive configuration, and as a result, noise can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the electric compressor which reduced the noise with the comparatively cheap structure can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing the overall configuration of an electric compressor according to a first embodiment. 1 is a top view illustrating an overall configuration of an electric compressor according to a first embodiment. It is a side view (1) which shows the structure of the accumulator side junction part of the electric compressor which concerns on Embodiment 1. FIG. It is a side view (2) which shows the structure of the accumulator side junction part of the electric compressor which concerns on Embodiment 1. FIG. FIG. 5 is a top view showing an overall configuration of an electric compressor according to Embodiment 2. It is a side view which shows the structure of the accumulator side junction part of the electric compressor which concerns on Embodiment 2. FIG. It is a side view which shows the structure of the accumulator side junction part of the electric compressor which concerns on Embodiment 3. FIG. It is explanatory drawing which shows the detailed structure of the accumulator side junction part of the electric compressor which concerns on Embodiment 3. FIG. It is a side view which shows the structure of the accumulator side junction part of the electric compressor which concerns on a 1st modification. It is a side view which shows the structure of the accumulator side junction part of the electric compressor which concerns on a 2nd modification.

  Hereinafter, an embodiment of the present invention (hereinafter referred to as “the present embodiment”) will be described in detail with reference to the drawings. Each figure is only schematically shown so that the present invention can be fully understood. Therefore, the present invention is not limited to the illustrated example. Moreover, in each figure, the same code | symbol is attached | subjected about the common component and the same component, and those overlapping description is abbreviate | omitted.

[Embodiment 1]
<Configuration of electric compressor>
Hereinafter, the configuration of the electric compressor 1 according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a longitudinal sectional view showing the overall configuration of the electric compressor 1. FIG. 2 is a top view showing the overall configuration of the electric compressor 1. Here, the case where the electric compressor 1 is a single cylinder vertical rotary compressor will be described.

As shown in FIG. 1, the electric compressor 1 according to the first embodiment has a configuration in which a sealed container 4 and an accumulator 5 are joined by a plate-like member 6.
The sealed container 4 is a container that houses the electric motor 2 and the compression mechanism unit 3.
The accumulator 5 is a container for storing a refrigerant to be supplied to a refrigeration unit (not shown) in a pressurized state.
The plate-like member 6 is a joining member that joins the sealed container 4 and the accumulator 5.

  The sealed container 4 includes a cylinder body 41, a lid body 42, and a bottom body 43. The cylinder 41 is a cylindrical casing made of a steel plate and opened at the top and bottom. The sealed container 4 has a lid 42 fitted into the upper portion of the cylindrical body 41, a bottom body 43 fitted into the lower portion of the cylindrical body 41, and each fitting portion is welded so that the inside thereof is sealed. It has been configured.

  The electric motor 2 is a drive source that drives the compression mechanism unit 3. The electric motor 2 includes a stator 21 fixed to the sealed container 4 by shrink fitting or the like, and a rotor 22 fitted with a crankshaft 31 of the compression mechanism unit 3.

  The compression mechanism unit 3 is a mechanism that compresses the refrigerant and supplies the compressed refrigerant to a freezing unit of a refrigerating and air-conditioning apparatus (not shown). The compression mechanism unit 3 includes a crankshaft 31, a main bearing 32, a cylinder 33, a sub bearing 34, a roller 35, and a vane 36 as main elements.

  The crankshaft 31 is a member that drives the vane 36 inside the cylinder 33. The crankshaft 31 includes a main bearing insertion portion 32b on one side in the axial direction. Further, the crankshaft 31 includes a sub-bearing insertion portion 34b on the other side in the axial direction. The crankshaft 31 is rotatably supported inside the hermetic container 4 by inserting the main bearing insertion portion 32 b into the main bearing 32 and inserting the sub bearing insertion portion 34 b into the sub bearing 34.

  The crankshaft 31 includes an eccentric portion 31a between the main bearing insertion portion 32b and the auxiliary bearing insertion portion 34b. The eccentric part 31 a of the crankshaft 31 is rotatably fitted inside the roller 35. The roller 35 is rotatably fitted in the vane 36 so that the outer periphery thereof abuts the vane 36. The vane 36 is fitted into the cylinder 33 so as to slide inside the cylinder 33.

  The cylinder 33 is fastened to the main bearing 32 by main bearing fastening bolts 32a. The auxiliary bearing 34 is fastened to the cylinder 33 by auxiliary bearing fastening bolts 34a. The compression mechanism 3 is fixed inside the sealed container 4 by fixing the main bearing 32 to the cylinder 41 by welding or the like.

  A refrigerating machine oil (not shown) for smoothly operating the compression mechanism unit 3 is enclosed in the sealed container 4. The refrigerating machine oil is in a state of being accumulated on the bottom body 43.

  The compression mechanism unit 3 is joined to the accumulator 5 by a plate-like member 6. The accumulator 5 supplies the refrigerant to the compression mechanism unit 3 through the suction pipe 56. The suction pipe 56 is joined to the suction port 44 of the compression mechanism unit 3.

The plate-like member 6 is formed by bending a long flat plate-like steel plate into a shape that can be easily joined to the outer peripheral surface of the sealed container 4 and the outer peripheral surface of the accumulator 5. In the example illustrated in FIG. 2, the plate-like member 6 includes a body portion 61 and a pair of leg portions 62.
The body part 61 is a part that is welded and fixed to the outer peripheral surface of the sealed container 4.
The leg part 62 is a part formed so as to protrude from the body part 61 in a direction facing the accumulator 5.

In the body portion 61, a joint portion (hereinafter referred to as “container-side joint portion”) 63 that is welded and fixed to the outer peripheral surface of the sealed container 4 with a welding material is formed.
A joint portion (hereinafter referred to as an “accumulator-side joint portion”) 64 that is welded and fixed to the outer peripheral surface of the accumulator 5 and the welding material 66 is formed at the distal end portion of the leg portion 62.
In the first embodiment, the accumulator side joint portion 64 is formed in a straight line so that only the tip portion of the accumulator side joint portion 64 contacts the outer peripheral surface of the accumulator 5.

In such a configuration, the electric compressor 1 operates as follows.
The electric motor 2 (see FIG. 1) of the electric compressor 1 rotates the crankshaft 31 of the compression mechanism unit 3 by rotating the rotor 22. Along with the rotation, the eccentric portion 31 a of the crankshaft 31 rotates the roller 35 and further slides the vane 36.

  At this time, the refrigerant stored in the accumulator 5 is sucked into the cylinder 33. The refrigerant sucked into the cylinder 33 is compressed by the compression mechanism unit 3 until the pressure changes from the suction pressure to the discharge pressure. The compressed refrigerant is once discharged into the sealed container 4 and then discharged from a discharge pipe 37 installed in the sealed container 4 to a refrigeration unit of a refrigerating and air-conditioning apparatus (not shown). The refrigerant discharged to the refrigeration unit functions as a working fluid that operates the refrigeration unit. Thereafter, the refrigerant discharged to the refrigeration unit is returned to the accumulator 5. The arrows shown in FIG. 1 indicate the flow path of the refrigerant as the working fluid.

<Configuration of accumulator side joint>
In the electric compressor 1, the compression mechanism unit 3 serves as a vibration generation source, and the vibration of the compression mechanism unit 3 propagates from the sealed container 4 to the accumulator 5 through the plate-like member 6. In the electric compressor 1, in order to efficiently reduce the vibration of the compression mechanism section 3, the accumulator side joint section 64 is formed in the shape shown in FIGS. 3A and 3B.

  Hereinafter, with reference to FIG. 3A and FIG. 3B, it demonstrates per structure of the accumulator side junction part 64. FIG. 3A and 3B are side views showing the configuration of the accumulator side joining portion 64, respectively. FIG. 3A shows a configuration of the accumulator side joint 64 before being fixed to the accumulator 5 by welding. On the other hand, FIG. 3B shows a configuration of the accumulator side joint portion 64 after being fixed to the accumulator 5 by welding.

  As shown in FIG. 3A, the accumulator-side joint portion 64 is formed with a notch 65 that extends from the edge portion of the tip portion toward the inner portion. In the first embodiment, a description will be given assuming that the notch 65 is formed in an arc shape (in the example shown in FIG. 3A, a semicircle). However, the cutout portion 65 is not limited to the edge portion of the tip portion, and can be formed in the edge portion of the side portion of the accumulator side joint portion 64. In the first embodiment, the case where the cross-sectional shape of the edge portion of the accumulator side joint portion 64 of the plate-like member 6 is rectangular will be described.

  As shown in FIG. 3B, the welding material 66 is stacked (installed) from the inside of the notch portion 65 to the outside of the edge portion of the accumulator side joining portion 64 so as to fill at least the inside of the notch portion 65. ). Here, the welding material 66 is demonstrated as what is piled up in the circular shape of the diameter D by the side view. Therefore, the welding material 66 is joined to the plate-like member 6 along the end surface of the edge portion of the notch 65 formed in a semicircular shape when viewed from the side, and is accumulated at the bottom surface of the circle having the diameter D when viewed from the side. 5 is joined to the outer peripheral surface.

  Further, here, the accumulator side joining portion 64 is a fitting portion 53 in which the upper housing 51 and the lower housing 52 constituting the accumulator 5 are fitted, and is fixed to the outer peripheral surface of the accumulator 5 by welding. An explanation will be given assuming this. The fitting portion 53 is thicker than other portions of the accumulator 5. Therefore, the electric compressor 1 can deposit a relatively large amount of the welding material 66 on the fitting portion 53, and thereby the plate-shaped member 6 and the accumulator 5 can be favorably welded and fixed.

  Below, the effect by forming the notch part 65 like this Embodiment 1 is demonstrated. Here, the thickness of the plate-like member 6 is “T”, the diameter of the notch 65 and the diameter of the welding material 66 are both “D”, and the configuration in which the notch 65 is not formed is a comparative example. The effect by forming the notch part 65 is demonstrated by comparing the welding area of this and the welding area of this Embodiment 1. FIG.

  In addition, “a configuration in which the notch portion 65 is not formed”, which is a comparative example, means that the shape of the edge portion of the accumulator side joint portion of the plate-like member is linear in a side view, as in the conventional electric compressor. It means the configuration that is. In the comparative example, description will be made assuming that the welding material is stacked in a semicircular shape in a side view.

(Welding area of comparative example: welding area when notch 65 is not formed)
In the comparative example, the shape of the edge portion of the accumulator side joint portion of the plate-like member is linear in a side view. Moreover, the welding material is piled up in semicircle shape by the side view. Therefore, in the comparative example, the welding area on the plate-like member side is “T × D”. Further, the welding area on the accumulator side is “(D / 2) × (D / 2) × π × (1/2)”.

(Welding area of the first embodiment: welding area when the notch 65 is formed)
On the other hand, in the first embodiment, the shape of the edge portion of the accumulator side joining portion 64 of the plate-like member 6 is semicircular when viewed from the side. Moreover, the welding material 66 is piled up circularly by side view. Therefore, in the first embodiment, the welding area on the plate-like member 6 side is “T × D × π × (1/2)”. Further, the welding area on the accumulator 5 side is “(D / 2) × (D / 2) × π”.

  Therefore, the welding area of the first embodiment is about 157% (that is, “π × (1/2)” times) on the plate-like member 6 side and 200% on the accumulator 5 side, compared with the welding area of the comparative example. Can be increased.

  The welding strength is proportional to the welding area. Therefore, in the electric compressor 1 according to the first embodiment, the welding strength is about 157% on the plate-like member 6 side and on the accumulator 5 side than the electric compressor according to the comparative example corresponding to the conventional electric compressor. It can be increased by 200%. As a result, the electric compressor 1 can reduce noise generated by the vibration of the compression mechanism unit 3 propagating from the sealed container 4 to the accumulator 5.

  Moreover, the electric compressor 1 can increase welding strength and reduce noise with a relatively inexpensive configuration without increasing the number of parts, cost, weight, or the like.

  Further, the electric compressor 1 causes the welding position to vary because the welding material 66 is filled in the notch portion 65 (that is, the plate-like member 6 and the welding material 66 are partially separated). It is also possible to suppress the phenomenon of welding in a point contact state.

  As described above, according to the electric compressor 1 according to the first embodiment, it is possible to reduce noise with a relatively inexpensive configuration as compared with the conventional electric compressor.

[Embodiment 2]
The electric compressor 1 according to the first embodiment has a configuration in which the accumulator-side joint portion 64 of the plate-like member 6 is formed linearly in a top view.
In contrast, the second embodiment provides an electric compressor 1 </ b> A in which the accumulator-side joint portion 64 a of the plate-like member 6 is curved when viewed from above.

  Hereinafter, the configuration of the electric compressor 1 </ b> A according to the second embodiment will be described with reference to FIGS. 4 and 5. FIG. 4 is a top view showing the overall configuration of the electric compressor 1A. FIG. 5 is a side view showing the configuration of the accumulator side joint 64a of the electric compressor 1A.

  As shown in FIGS. 4 and 5, the electric compressor 1 </ b> A according to the second embodiment is at least an accumulator of the plate-like member 6 </ b> A as compared with the electric compressor 1 according to the first embodiment (see FIGS. 2 and 3B). The difference is that the portion where the side joint portion 64a is formed has a curved shape in a top view according to the shape of the outer peripheral surface of the accumulator 5.

  In the electric compressor 1 according to the first embodiment (see FIGS. 2 and 3B), since only the tip of the accumulator side joint portion 64 contacts the outer peripheral surface of the accumulator 5, the accumulator side joint portion 64 and the outer peripheral surface of the accumulator 5 are used. There may be a gap between them. If a gap is generated, the electric compressor 1 according to the first embodiment may have a reduced welding strength.

  On the other hand, in the electric compressor 1A according to the second embodiment, the entire curved surface of the accumulator side joint portion 64a abuts on the outer peripheral surface of the accumulator 5, and therefore, between the accumulator side joint portion 64a and the outer peripheral surface of the accumulator 5. It can suppress that a clearance gap arises in the. As a result, the electric compressor 1A according to the second embodiment can suppress a decrease in welding strength. Therefore, the electric compressor 1A can further reduce noise than the electric compressor 1 according to the first embodiment.

  Moreover, the electric compressor 1 </ b> A can support the accumulator 5 with the entire curved surface of the accumulator-side joint portion 64 a. For this reason, the electric compressor 1 </ b> A can further reduce noise than the electric compressor 1 according to the first embodiment.

  The electric compressor 1 </ b> A is configured such that a portion of the accumulator side joint portion 64 a close to the container side joint portion 63 is in close contact with the outer peripheral surface of the accumulator 5. Therefore, 1 A of electric compressors can make the part near the container side junction part 63 of the welding material 66 piled up so that the inside of the notch part 65 may be filled closely_contact | adhere to the outer peripheral surface of the accumulator 5. FIG. Therefore, the electric compressor 1A can further increase the welding strength as compared with the electric compressor 1 according to the first embodiment. For this reason, the electric compressor 1 </ b> A can further reduce noise than the electric compressor 1 according to the first embodiment.

As described above, according to the electric compressor 1A according to the second embodiment, like the electric compressor 1 according to the first embodiment, the noise is reduced more than the conventional electric compressor with a relatively inexpensive configuration. be able to.
Moreover, according to the electric compressor 1A, noise can be further reduced as compared with the electric compressor 1 according to the first embodiment.

[Embodiment 3]
The electric compressor 1 according to the first embodiment has a configuration in which the cross-sectional shape of the edge portion of the accumulator-side joint portion 64 of the plate-like member 6 is formed in a rectangular shape.
In contrast, the third embodiment provides an electric compressor 1B in which the cross-sectional shape of the edge portion of the accumulator-side joint portion 64b of the plate-like member 6B is curved.

  Hereinafter, the configuration of the electric compressor 1 </ b> B according to the third embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a side view showing the configuration of the accumulator side joint 64b of the electric compressor 1B. FIG. 7 is an explanatory diagram showing a detailed configuration of the accumulator side joint portion 64b of the electric compressor 1B. FIG. 7A shows the overall configuration of the accumulator side joint 64b, and FIG. 7B shows the configuration around the notch 65 of the accumulator side joint 64b. These show the structure of the joining location of the accumulator side joining part 64b and the accumulator 5. FIG.

  As shown in FIGS. 6 and 7A, the electric compressor 1B according to the third embodiment has a plate-like member 6B as compared with the electric compressor 1 according to the first embodiment (see FIGS. 2 and 3B). This is different in that the cross-sectional shape of the edge portion of the accumulator side joint 64b is a curved shape.

  Specifically, as shown in FIG. 7A, in the accumulator side joining portion 64 b, a portion above the notch portion 65 and a portion below the notch portion 65 are opposed to the outer peripheral surface of the accumulator 5. It has a shape curved toward the facing surface.

  As shown in FIG. 7B, the accumulator side joint portion 64 b is stacked so that the welding material 66 is filled into the notch portion 65. Then, as shown in FIG. 7C, the accumulator side joining portion 64 b is welded and fixed to the fitting portion 53 of the accumulator 5. The accumulator 5 has a shape in which the diameter of the fitting portion 53 is thicker than the diameter of other portions of the accumulator 5.

  As described above, the electric compressor 1 according to the first embodiment has a configuration in which the cross-sectional shape of the edge portion of the accumulator-side joint portion 64 of the plate-like member 6 is formed in a rectangular shape. However, the cross-sectional shape of the edge portion of the accumulator-side joint portion 64 of the plate-like member 6 does not necessarily need to be rectangular. For example, as in the electric compressor 1B according to the third embodiment shown in FIGS. 6 and 7, the cross-sectional shape of the edge portion of the accumulator side joint 64b of the plate-like member 6B is directed toward the facing surface facing the accumulator 5. A curved configuration may be used.

  Such an electric compressor 1B can absorb vibration propagating from the sealed container 4 to the accumulator 5 through the plate-like member 6B by the elasticity of the material constituting the plate-like member 6B. Therefore, the electric compressor 1B can further reduce noise than the electric compressor 1 according to the first embodiment.

As described above, according to the electric compressor 1B according to the third embodiment, like the electric compressor 1 according to the first embodiment, the noise is reduced more than the conventional electric compressor with a relatively inexpensive configuration. be able to.
Moreover, according to the electric compressor 1B, noise can be further reduced as compared with the electric compressor 1 according to the first embodiment.

  The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. Moreover, it is possible to add / delete / replace other configurations for a part of the configurations of the embodiments.

  Further, for example, in the above-described embodiment, the description has been given by taking the hermetic vertical rotary compressor as an example. However, the present invention is not limited to this, and can be applied to, for example, a non-hermetic rotary compressor, a scroll compressor, and the like.

  Further, for example, in the electric compressor 1 according to the first embodiment described above, the accumulator side joint portion 64 of the plate-like member 6 and the accumulator 5 are fixed by welding at one point. However, the electric compressor 1 may be configured to weld and fix the accumulator-side joint portion 64 of the plate-like member 6 and the accumulator 5 at two or more points. Alternatively, even if the electric compressor 1 is a single point, the accumulator side joint 64 of the plate-like member 6 and the accumulator 5 may be linearly welded and fixed. Thereby, the electric compressor 1 can improve the welding strength between the accumulator-side joint portion 64 of the plate-like member 6 and the accumulator 5. As an example, FIGS. 8 and 9 show a first modification and a second modification.

  Hereinafter, the configuration of the electric compressor 1C according to the first modification will be described with reference to FIG. FIG. 8 is a side view showing the configuration of the main part of the electric compressor 1 </ b> C according to the first modification.

  As shown in FIG. 8, the electric compressor 1 </ b> C according to the first modification has a configuration in which the vertical width of the accumulator side joint portion 64 c is slightly larger than the vertical width of the fitting portion 53 of the accumulator 5. A plurality (two in the first modification) of the notch portions 65 are formed so as to go from the edge portion of the front end portion of the accumulator side joint portion 64c of the plate-like member 6C toward the inner portion. In the first modification, each notch 65 is formed at a position corresponding to the fitting portion 53 of the accumulator 5. The accumulator side joining portion 64c of the plate-like member 6C is welded and fixed to the accumulator 5 at the fitting portion 53.

  In the electric compressor 1C according to the first modified example, the accumulator side joint portion 64c of the plate-like member 6C and the accumulator 5 are fixed by welding at two or more points. Therefore, the electric compressor 1 </ b> C can improve the welding strength between the accumulator-side joint portion 64 c of the plate-like member 6 </ b> C and the accumulator 5 as compared with the electric compressor 1 according to the first embodiment.

  Hereinafter, the configuration of the electric compressor 1D according to the second modification will be described with reference to FIG. FIG. 9 is a side view showing the configuration of the main part of the electric compressor 1D according to the second modification.

  As shown in FIG. 9, the electric compressor 1D according to the second modification has a first deformation in which the longitudinal width of the accumulator side joint portion 64d is the first deformation as compared with the electric compressor 1C according to the first modification (see FIG. 8). The difference is that it is larger than the vertical width of the accumulator side joint 64c (see FIG. 8) of the example. A plurality (two in the second modified example) of the notch portions 65 are formed so as to go from the edge portion of the front end portion of the accumulator side joint portion 64d of the plate-like member 6D toward the inner portion. In the second modified example, each notch 65 is formed at a position corresponding to locations (hereinafter referred to as “non-fitting portions”) 54 a and 54 b that are disengaged from the fitting portion 53 of the accumulator 5. The accumulator side joining portion 64d of the plate-like member 6D is welded and fixed to each of the upper housing 51 and the lower housing 52 of the accumulator 5 by non-fitting portions 54a and 54b.

  Note that the non-fitting portions 54 a and 54 b are thinner than the fitting portion 53. In the conventional electric compressor, since the welding strength between the accumulator side joint portion of the plate-like member and the accumulator is relatively low, it is difficult to weld and fix the non-fitting portion. However, in the electric compressor 1D according to the second modification, the welding strength between the accumulator-side joint portion 64d of the plate-like member 6D and the accumulator 5 is higher than that of the conventional electric compressor, so that the non-fitting portions 54a and 54b Can be fixed by welding.

  In the electric compressor 1D according to the second modification, the accumulator-side joint 64d and the accumulator 5 of the plate-like member 6D are multipointed at two or more points, similarly to the electric compressor 1C according to the first modification. It is fixed by welding. Therefore, the electric compressor 1D according to the second modified example can improve the welding strength between the accumulator-side joint portion 64d of the plate-like member 6D and the accumulator 5 as compared with the electric compressor 1 according to the first embodiment.

  Moreover, the electric compressor 1D according to the second modified example can weld and fix the accumulator-side joining portion 64d of the plate-like member 6D and the accumulator 5 by the non-fitting portions 54a and 54b. Therefore, the electric compressor 1D according to the second modified example can improve the degree of design freedom compared to the electric compressor 1C according to the first modified example. Moreover, the electric compressor 1D according to the second modification supports both the upper housing 51 and the lower housing 52 of the accumulator 5 with the plate-like member 6D. Therefore, the electric compressor 1D according to the second modified example can reduce vibration more efficiently than the electric compressor 1C according to the first modified example, depending on the design.

1, 1A, 1B, 1C, 1D Electric compressor 2 Electric motor 3 Compression mechanism 4 Sealed container 5 Accumulator 6, 6A, 6B, 6C, 6D Plate member (joining member)
DESCRIPTION OF SYMBOLS 21 Stator 22 Rotor 31 Crankshaft 31a Eccentric part 32 Main bearing 32a Main bearing tightening bolt 32b Main bearing insertion part 33 Cylinder 34 Sub bearing 34a Sub bearing tightening bolt 34b Sub bearing insertion part 35 Roller 36 Vane 37 Discharge pipe 41 Cylindrical body 42 Lid body 43 Bottom body 44 Suction port 51 Upper housing 52 Lower housing 53 Fitting portion 54a, 54b Non-fitting portion 56 Suction pipe 61 Body portion 62 Leg portion 63 Container side joint portion 64, 64a, 64b, 64c 64d Accumulator side joint 65 Notch 66 Welding material (welded part)

Claims (6)

A hermetically sealed container that houses an electric motor and a compression mechanism driven by the electric motor;
An accumulator,
A joining member used for joining the sealed container and the accumulator;
The accumulator includes an upper housing and a lower housing, and the diameter of the fitting portion into which the upper housing and the lower housing are fitted is thicker than the diameter of other portions,
The joining member includes a container side joining portion joined to the sealed container, and an accumulator side joining portion joined to the accumulator,
The accumulator side joining portion has a shape in which a notch portion is formed from an edge portion toward an inner portion, and a portion above the notch portion and a portion below the notch portion are formed on the accumulator. An electric compressor characterized in that it has a curved shape facing the outer surface facing the outer peripheral surface, and is welded and fixed at least to the fitting portion of the accumulator at the notch. A hermetically sealed container that houses an electric motor and a compression mechanism driven by the electric motor;
An accumulator,
A joining member used for joining the sealed container and the accumulator;
The accumulator includes an upper housing and a lower housing,
The joining member includes a container side joining portion joined to the sealed container, and an accumulator side joining portion joined to the accumulator,
The accumulator side joining portion has a shape in which a notch portion is formed from an edge portion toward an inner portion, and a shape in which a plurality of the notch portions are formed, and the upper housing and the lower side are formed. An electric compressor characterized by being welded and fixed to each of the upper casing and the lower casing of the accumulator at least at the notch at a location where the casing is removed from the fitting portion. The electric compressor according to claim 1 or 2 ,
The electric compressor according to claim 1, wherein the notch is formed in an arc shape. The electric compressor according to any one of claims 1 to 3 ,
The joining member includes a body part in which the container-side joining part is formed, and a pair of long lengths in which the accumulator side joining part is formed at a tip part and protrudes from the body part in a direction facing the accumulator. Legs, and
An electric compressor characterized in that at least a portion of the leg portion where the accumulator side joint is formed has a curved shape in accordance with the shape of the outer peripheral surface of the accumulator. The electric compressor according to any one of claims 1 to 4 ,
The accumulator side joining portion has a shape in which a plurality of the notches are formed,
The electric compressor according to claim 1, wherein the joining member is welded and fixed to the accumulator at two or more points. The electric compressor according to any one of claims 1 to 5 ,
The electric compressor according to claim 1, wherein the joining member is formed by bending a single plate-like member.

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