CN1407231A

CN1407231A - Vortex compressor

Info

Publication number: CN1407231A
Application number: CN 02129811
Authority: CN
Inventors: 杉本和禧; 清川保则; 登义典
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 2001-08-30
Filing date: 2002-08-15
Publication date: 2003-04-02
Also published as: JP2003065255A

Abstract

The invention relates to a scroll compressor. The scroll compressor S comprises a scroll compressing element 2 in a closed container 1, a motor driving element 3 for driving the scroll compressing element 2, and a support frame 4 having in the center thereof a bearing portion 6 for journaling a rotary shaft 5 of the motor driving element 3. The closed container 1 is provided with a body 1A and an end cap 1B welded to be fixed on the body 1A in a position corresponding to a side of the fixed scroll 7. On a side surface of the fixed scroll 7 in the position corresponding to a welding portion (a welding part 74) between the end cap 1B and the body 1A, a recessed depression portion 11C is formed in a direction separated away from the closed container 1.

Description

Scroll compressor

Technical field

The present invention relates to a kind of scroll compressor that allows fixed scroll and swing scrollwork be meshing with each other and to compress.

Background technique

General scroll compressor in the past constitutes by following mode, its structure includes, in seal container, have running shaft electric element, drive and, the cover plate of scroll uprightly be arranged on the vortex compressing member of the fixed scroll formation on the end plate by this electric element by the scroll cover plate uprightly being arranged on the swing scrollwork on the end plate and being meshed with this swing scrollwork.Thereby, by allowing the swing scrollwork not rotating, be formed at fixed scroll and dwindle successively from outside to inside with a plurality of compression volumes between the cover plate of swinging scrollwork thereby allow with respect to the mode of the fixed scroll rotation one side that simultaneously revolves round the sun, compress.

What represent at Figure 12, Figure 13 is the part enlarged view of the fixed scroll 107 of this scroll compressor in the past.The seal container 101 of scroll compressor by the cylindrical body 101A that accommodates electric element not shown in the figures and vortex compressing member (only representing fixed scroll 107) and on fixed scroll 107 side corresponding positions bowl-shape end cap 101B main body covered 101A one side opening, that peripheral portion welding is fixing constitute (illustrated among Figure 12 welding before state).The side of the end plate 111 of this fixed scroll 107 be by on the end cap 101B internal surface by the chimeric fixing large-diameter portion 111A of hot pressing for example, and should extend to the stairstepping that the minor diameter 111B of support frame 104 1 sides constitutes at diameter portion 111A certainly.

The edge part of main body 101A enters between the minor diameter 111B and end cap 101B of this fixed scroll 107.Thereby, allow the end plate 111 of fixed scroll 107 contact with support frame 104, inserting bolt 136 in the bolt hole 133 on being formed at end plate 111 is screwed on the support frame 104, thereby fixed scroll 107 and support frame 104 are combined.Thus, the contact position 104A of the end face of the minor diameter 111B of fixed scroll 107 and support frame 104 fits tightly, thereby guarantees the sealing between fixed scroll 107 and the support frame 104.

Like this, the peripheral portion welding with end cap 101B is fixed on the main body 101A.Figure 13 shows the state after the welding.In addition, the label among Figure 13 174 is weld parts.

Summary of the invention

Yet when the peripheral portion welding with end cap 101B was fixed on the main body 101A, under the heat affecting when it welds, main body 101A can inwards bloat distortion.This bellying is represented with 176 in Figure 13.Thus, the minor diameter 111B of end plate 111 that is positioned at the fixed scroll 107 of main body 101A inboard produces deflection owing to the distortion of this bellying 176, thus, produced performance and become bad, or the tooth breakage that causes because of the collision with scroll wraps, maybe can't guarantee the problems such as sealing of fixed scroll 107 and the contact position 104A of support frame 104.

The objective of the invention is to solve this problems of the prior art, provide a kind of performance that prevents that the fixed scroll deflection from causing to become bad, the scroll compressor that reliability is high.

Scroll compressor of the present invention, in seal container, be provided with the vortex compressing member, drive the electric element of this vortex compressing member, be provided with the support frame of the bearing portion that supports the electric element running shaft in central authorities, and, the vortex compressing member is by the fixing fixed scroll that contacts with support frame that uprightly is provided with the scroll cover plate on the surface of end plate, revolve round the sun under the driving of electric element with respect to this fixed scroll on the support frame with being supported on, the upright swing scrollwork that is the scroll cover plate that is provided with constitutes on a side surface of end plate, allowing the intermeshing a plurality of compression volumes of two cover plates dwindle successively by outside-in compresses, wherein, seal container have main body and with fixed scroll side corresponding position on the fixing lid of welding, the side of fixed scroll on corresponding to this lid and the welding position of main body is formed with the depressed part that the direction fovea superior that separates with seal container is sagged.

Scroll compressor of the present invention, wherein, above-mentioned depressed part is formed on and contact with support frame position outside the position of fixed scroll.

Scroll compressor of the present invention, wherein, the depressed part in above-mentioned each invention and fixedly the bolt hole used of fixed scroll and support frame separated enough distances.

According to the present invention, because in seal container, be provided with the vortex compressing member, drive the electric element of this vortex compressing member, be provided with the support frame of the bearing portion that supports the electric element running shaft in central authorities, and, the vortex compressing member is by the cover plate that uprightly is provided with scroll on the surface of end plate, fixing fixed scroll contacts with support frame, revolve round the sun under the driving of electric element with respect to this fixed scroll on the support frame with being supported on, the upright swing scrollwork that is the scroll cover plate that is provided with constitutes on a side surface of end plate, be meshing with each other a plurality of compression volumes of forming of two cover plates are dwindled successively by outside-in and compress, wherein, seal container have main body and with fixed scroll side corresponding position on the fixing lid of welding, the side of fixed scroll on corresponding to this lid and the welding position of main body, be formed with the depressed part that the direction fovea superior that separates with seal container is sagged, so when Jiang Gai is welded on the main body, even its welding heat inwards is out of shape the seal container main body, under situation about bloating, also can allow its bellying not to be housed in the depressed part, absorb distortion with the contacted mode in fixed scroll side.

Thus, can prevent the distortion along with the welding heat affected main body of bringing of the main body of seal container and lid in advance, make fixed scroll produce deflection, the performance that causes reduces or the breakage of cover plate, perhaps, owing to and above-mentioned support frame between the mis-behave that causes of the deterioration of sealing.

According to scroll compressor of the present invention, owing on above-mentioned basis, depressed part is formed at fixed scroll and support frame touching position position in addition, so can prevent because the deflection of the fixed scroll that the seal container subject distortion brings, simultaneously the area of fixed scroll and support frame touching position can be kept, and the sealing between fixed scroll and the support frame can be kept effectively.

According to scroll compressor of the present invention and since will be above-mentioned on basis of each invention depressed part and fixedly the bolt hole used of fixed scroll and support frame separated enough distances, thereby can prevent the problem of fixed scroll installation strength reduction.Thus, can provide a kind of reliability high scroll compressor.

Description of drawings

Fig. 1 is the vertical profile side view that is applicable to scroll compressor of the present invention (along the section of the A-A line direction of Fig. 2).

Fig. 2 is the plan view that the scroll compressor part of Fig. 1 cuts.

Fig. 3 has removed the end cap of the scroll compressor seal container among Fig. 1 and the vertical profile side view of bottom.

Fig. 4 is the plan view of the scroll compressor of Fig. 3.

Fig. 5 is the plan view of the scroll compressor terminal portion of Fig. 1.

Fig. 6 is the plan view of removing from Fig. 4 under the vortex compression element state.

Fig. 7 is the vertical profile side view of vortex compressing member of the scroll compressor of Fig. 1.

Fig. 8 is the worm's eye view of the vortex compressing member of Fig. 7.

Fig. 9 is the electric element of scroll compressor of Fig. 1 and the vertical profile side view of support frame.

Figure 10 is the fixedly scroll compressor seal container main body among Fig. 1 and the end cap fixed scroll amplification vertical profile side view partly under the state before of welding.

Figure 11 is the fixedly scroll compressor seal container main body among Figure 10 and the end cap fixed scroll amplification vertical profile side view partly under the state afterwards of welding.

Figure 12 is the fixed scroll amplification vertical profile side view partly under the state before main body and the end cap of the fixing existing scroll compressor seal container of welding.

Figure 13 is the fixedly scroll compressor seal container main body among Figure 12 and the end cap fixed scroll amplification vertical profile side view partly under the state afterwards of welding.

Embodiment

Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.Fig. 1 is the vertical profile side view that is applicable to scroll compressor S of the present invention (along the section of the A-A line direction of Fig. 2), Fig. 2 is the plan view that the scroll compressor S of Fig. 1 cuts a part, Fig. 3 is a vertical profile side view of having removed the scroll compressor S of the end cap 1B of seal container 1 and bottom 1C, Fig. 4 is the plan view of the scroll compressor S of Fig. 3, Fig. 5 is the terminal T plan view partly of the scroll compressor S of Fig. 1, Fig. 6 is the plan view of removing from Fig. 4 under vortex compressing member 2 states, Fig. 7 is the vertical profile side view of vortex compressing member 2 of the scroll compressor S of Fig. 1, Fig. 8 is the worm's eye view of the vortex compressing member 2 of Fig. 7, and Fig. 9 is the electric element 3 of scroll compressor S of Fig. 1 and the vertical profile side view of support frame 4.

In each figure, the 1st, the bowl-shape lid (end cap 1B and bottom 1C) that seal container, this seal container 1 are weldingly fixed on the two ends up and down of this main body 1A by main body 1A cylindraceous, respectively constitutes.Like this, accommodating the electric element 3 of vortex compressing member 2 and these vortex compressing member 2 usefulness of driving in upside in this seal container 1 and the downside respectively.Accommodating support frame 4 in the seal container 1 between this vortex compressing member 2 and electric element 3, the central authorities of this support frame 4 towards below the outstanding bearing portion 6 that is formed with supporting rotating shaft 5.

Above-mentioned vortex compressing member 2 is made of fixed scroll 7 and swing scrollwork 8.Fixed scroll 7 around it hot pressing be entrenched on the end cap 1B internal surface of seal container 1 (hot pressing is among Figure 10, Figure 11 and represents with 11E), by the discoideus end plate 11 that this seal container 1 internal separation is gone out hyperbaric chamber 9 and low pressure chamber 10, uprightly be arranged on the involute shape of these end plate 11 1 sides (downside surface), perhaps, the scroll cover plate 13 of close therewith curve formation constitutes.On end plate 11 middle bodies of fixed scroll 7, be formed with the tap hole 14 that is connected with hyperbaric chamber 9 in the seal container 1.In addition, fixed scroll 7 allows the projected direction of cover plate 13 be in the below.

Swing scrollwork 8 is by discoideus end plate 15, uprightly be arranged on the involute shape of these end plate 15 1 sides (uper side surface), perhaps, the scroll cover plate 16 that constitutes of close therewith curve, protrude in the axle sleeve hole portion 17 that end plate 15 another sides (face of downside) central authorities form and constitute.Like this, swing scrollwork 8 allows the projected direction of cover plate 16 be in the top, and this cover plate 16 rotates 180 degree on the cover plate 13 of fixed scroll 7, be configured to the mode of fit engagement in opposite directions, forms a plurality of compression volumes 18 between

inner cover plate

13,16.

19 are provided in a side of the pin portion in the axle sleeve hole 17 that running shaft 5 front ends (upper end) are inserted in swing scrollwork 8, the eccentric setting in the axle center of the center of this pin portion 19 and running shaft 5.The 20th, Oldham's coupling is between the support frame 4 of swing scrollwork 8 downsides.On this Oldham's coupling 20, have and on relative position, protrude in the pair of

keys

21,21 that upside forms, and be a pair of

keyway

22,22 of the mutually opposed formation of 90 degree positions with these

keys

21,21.

On the one hand, be formed with a pair of

keyway

23,23 on the peripheral portion of the another side (face of downside) of swing scrollwork 8, can cooperating the key 21,21 of Oldham's coupling 20 in this

keyway

23,23 with being free to slide.In addition, on the peripheral portion of fixed scroll 7 with screw towards below fixing the pair of

keys parts

24,24 that section roughly is the L font highlightedly.This

key member

24,24 can match with the

groove

22,22 of Oldham's coupling 20 with being free to slide.At this moment,

key member

24,24 is projected into the below of the thrust bearing surface 26 of support frame 4 described later.Like this, allow swing scrollwork 8 on circular track, revolve round the sun according to the Oldham's coupling 20 of this matching relationship in mode not with respect to fixed scroll 7 rotations.

Be formed with the above-mentioned thrust bearing surface 26 that supports above-mentioned swing scrollwork 8 on the central part of above-mentioned support frame 4, the outside of this thrust bearing surface 26 is formed with 4 otch with 90 degree positions from peripheral portion towards the inboard, the state that staggers with 90 degree positions by the notch 27... of this 4 place forms the installation arm 28... that is projected into foreign side and below from thrust bearing surface 26 respectively.Have again, on the peripheral portion of this installation arm 28..., be formed with bolt hole 29 at 2 places respectively.And, between the

bolt hole

29,29 of opposed facing a pair of

installation arm

28,28, form the pin-and-hole 32,32 that inserts locating stud 31 usefulness respectively.

In addition, the external diameter of the installation arm 28... of this support frame 4, that is, the outside of support frame 4 is set less than the internal diameter of seal container 1 main body 1A.

On the one hand, also form the bolt hole 33 that 8 places connect on end plate 11 peripheral portions of fixed scroll 7 in the position of the bolt hole 29... of the above-mentioned support frame 4 of correspondence, simultaneously, on the peripheral portion of a side (surface of downside) of end plate 11, also form pin-and-

hole

34,34 respectively corresponding to above-mentioned pin-and-hole 32,32.Like this, in these paired pin-and-holes 32 and 34, insert respectively under the state of above-mentioned locating stud 31, bolt 36 is inserted among the bolt hole 33..., be screwed in by bolt hole 29..., thereby fixed scroll 7 is fixed on the support frame 4 with support frame 4.Thus, support frame 4 is fixed on the end cap 1B of seal container 1 by fixed scroll 7.

On the other hand, above-mentioned electric element 3 by stator 38 and in this stator 38 rotor rotated 39 constitute, chimeric the above-mentioned running shaft 5 at the center of this rotor 39 has constituted the part of rotor 39.Be formed with crank portion 41 in the bearing portion 6 that is supported on support frame 4 at the downside of the pin portion 19 of running shaft 5 front ends, the bottom of this running shaft 5 (below of rotor 39) is supported on the supplementary bearing 42.This supplementary bearing 42 is pressed in the main body 1A internal surface of seal container 1.

Form the bolt hole 43 that many places connect on this supplementary bearing 42, on the stator 38 of electric element 3, form through hole 44 in the position corresponding with bolt hole 43.And, below the installation arm 28... of support frame 4, be formed with bolt hole 46 on the also corresponding position with through hole 44.And, by bolt 47 being inserted in the bolt hole 43 of supplementary bearing 42, the through hole 44 that connects stator 38 is screwed on the bolt hole 46 of support frame 4, make supplementary bearing 42 and electric element 3 and support frame 4 integrated, electric element 3 and support frame 4 are fixed on the main body 1A of seal container 1 by supplementary bearing 42.

On the main body 1A of seal container 1, be formed with the smooth wedge portion 49 of shape shown in Figure 5.This wedge portion 49 by with main body 1A from the outside inwardly the mode of square wedge constitute, the terminal T that is connected on the electric element 3 is installed in this wedge portion 49.This wedge portion 49 must be positioned at the height (side) of the support frame 4 of electric element 3 tops, and as shown in Figure 6, this wedge portion 49 is installed on the support frame 4 in the mode of the notch 27 that is positioned at support frame 4.

On the other hand, by allowing the

key member

24,24 of fixed scroll 7, be in the mode of positions in the notchs 27,27 of 90 degree that staggers of the notch 27 with these wedge portion 49 present positions, that is, to dispose fixed scroll 7 and swing scrollwork 8, Oldham's coupling 20 with the wedge portion 49 that terminal T is installed roughly stagger mode that the

key member

24,24 of fixed scroll 7 is set on the positions of 90 degree.

The

key member

24,24 of aforesaid fixed scroll 7 is owing to be projected into the below of the thrust bearing surface 26 of support frame 4, so in a single day the position of this key member 24 is positioned at the direction of terminal T, then key member 24 will interfere with terminal T, so need improve the position of the vortex compressing member 2 of this part, thereby increase the size of scroll compressor S, the 90 degree configurations but aforesaid key member 24 and terminal T stagger, thereby can not interfere, the expansion of this size can be prevented.

In addition, when wedge portion 49 wedges, main body 1A produces distortion, but owing to set the outside of aforesaid support frame 4 less than the internal diameter of the main body 1A of seal container 1, even therefore support frame 4 is inserted in this main body 1A, main body 1A compressing support frame 4 by distortion does not have yet and produces crooked danger.

51 are mounted in the suction pipe of the main body 1A bottom of seal container 1, and this suction pipe 51 is connected with low pressure chamber 10 in the seal container 1 below electric element 3.52 are mounted in the discharge tube of the end cap 1B bottom of seal container 1, and the hyperbaric chamber 9 in this discharge tube 52 and the seal container 1 is connected.Like this, the notch 27... of above-mentioned support frame 4 becomes the path that refrigeration agent is imported vortex compressing member 2 from low pressure chamber 10.

54, the 56th, chimeric or be pressed into balace weight (balancer weight) on rotor 39 running shafts 5 that are installed in electric element 3 by heat, the rotor 39 upper end end turns that upside balace weight 54 is installed in respect to the axis of running shaft 5 and pin portion 19 symmetrical positions also will lean on the running shaft 5 of upside, downside balace weight 56 be installed in and the rotor 39 lower end end turns and the running shaft 5 between the supplementary bearing 42 of pin portion 19 homonymies on.

Particularly upside balace weight 54 extends to the top from the coil-end of rotor 39, and, utilize the space of support frame 4 bearing portions 6 peripheries, expand in the mode bigger than the external diameter of rotor 39 above more leaning on than the coil-end of stator 39, top is positioned on the periphery of bearing portion 6 of support frame 4.Thus, the center of gravity of the eccentric part of balace weight 54 (representing with arrow R in Fig. 9) moves up, is positioned near the periphery of the bearing portion 6 the swing scrollwork 8.Thus, balace weight 54 is lightened, eliminate the vibration that produces along with the eccentric motion of pin portion 19 simultaneously effectively.In addition, the deflection of running shaft 5 also is reduced, and can suppress the problem of crank portion 41 and the 6 one-sided collisions of bearing portion.

Then, 61 expulsion valves that are mounted on fixed scroll 7 end plates 11 another sides (with the uper side surface of cover plate 13 opposite sides).This expulsion valve 61 is by roughly being the support body 63 of a shape with the corresponding sections of being installed by bolt 62,62 of tap hole 14 of end plate 11, but and the side of this support body 63 and below the open easy on and off that forms remain on disc-shaped valve body 66 formations mobile space 64 in movably.The center of this valve body 66 is consistent with the center of tap hole 14.And, formation surface of contact 67 on the mobile space portion 64 of support body 63.

In addition, form the 1st and the 2nd communication paths 68,69 of two perforations on the upper wall of support body 63, the lower ending opening of each communication paths 68,69 is on surface of contact 67, and upper end open is in hyperbaric chamber 9.Two communication paths 68,69 are extended in vertical direction, and simultaneously, the 1st communication paths 68 is opened on the surface of contact 67 with the corresponding part of leaving from valve body 66 centers in position.On the other hand, the 2nd communication paths 69 is positioned at and the corresponding position of end cap 1B central lower, and has been formed centrally through hole 71 in end cap 1B.In addition, the 72nd, in keep the pipe of the temperature-sensitive portion of temperature-detecting device not shown in the figures, be inserted in the 2nd communication paths 69, this pipe 72 is drawn out to the outside by through hole 71.Like this, be under the situation of the abnormal high temperature be scheduled in the detected discharge temperature of temperature-sensitive portion (refrigerant temperature of discharge) of temperature-detecting device, stop electric element 3 by control gear not shown in the figures, thereby avoided because abnormal high temperature and scroll compressor S is produced the problem of damage.

At this, all sides of the end plate 11 of said fixing scrollwork 7 are as shown in figure 10 by hot pressing on every side and are entrenched in large-diameter portion 11A on the end cap 1B internal surface of seal container 1, are inserted into the hierarchic structure that the minor diameter 11B of main body 1A inboard constitutes.Like this, the end face of minor diameter 11B (end faces of support frame 4 one sides) is gone up and is formed the contacting part 11D that closely contacts with support frame 4 touching position 4A.

In addition, leave on the minor diameter 11B side face of a little position, be formed with the depressed part 11C of a little depression on the direction of leaving seal container 1 main body 1A in the large-diameter portion 11A of contacting part 11D one side.This depressed part 11C under the state that fixed scroll 7 hot pressing is entrenched on the end cap 1B, inboard corresponding formation of the position of repeating mutually with end and the main body 1A of end cap 1B.That is, depressed part 11C is arranged on as fixed scroll 7 and support frame 4 touching position 4A between the contacting part 11D and large-diameter portion 11A with external position, and simultaneously depressed part 11C is formed on the corresponding position of welding bearing with end cap 1B and main body 1A.

In addition, depressed part 11C is arranged to separate enough distances with the bolt hole 33 of fixed scroll 7 and support frame 4 usefulness.In addition, in Figure 10, Figure 11, demonstrate very thinly between depressed part 11C and the bolt 36, and in fact constitute, thereby have enough intensity by heavy wall.

Then, the assembling sequence to scroll compressor S of the present invention describes.At first, running shaft 5 is entrenched on the rotor 39 of electric element 3, with each

balace weight

54,56 by being pressed into or hot pressing is chimeric is assembled on the running shaft 5.And the stator 38 of mounting electric element 3 on supplementary bearing 42 makes through hole 44 consistent with bolt hole 43.Then, the rotor 39 that is assembled with running shaft 5 and

balace weight

54,56 is inserted in the stator 38, allows the lower support of running shaft 5 on supplementary bearing 42.Then, support frame 4 is covered on stator 38, make bolt hole 46 consistent, simultaneously, allow crank portion 41 insertions of running shaft 5 be supported in the bearing portion 6 with through hole 44.Like this, aforesaid bolt 47 is inserted by the order of bolt hole 43, through hole 44, bolt hole 46 from supplementary bearing 42 1 sides, finally be screwed on the bolt hole 46, thereby support frame 4, electric element 3 and supplementary bearing 42 are assembled in advance, form one.State as shown in Figure 9 is such.

On the one hand,, cover thereon, allow

cover plate

13 and 16 engagements cover plate 16 swing scrollwork 8 down with cover plate 13 mounting fixed scroll 7 up.Then, key 21,21 as downside mounting Oldham's coupling 20 on swing scrollwork 8, is made in

key

21,21 and the

keyway

23,23 of swinging scrollwork 8 and matches.Then, staggering on the fixed scroll 7 of 90 degree positions with the bolt

key member

24,24 of screwing on admittedly, under the state that is projected into upside than Oldham's coupling 20 with in each

keyway

22,22, match with this key 21,21 and keyway 23,23.Assemble vortex compressing member 2 shown in Figure 7 like this.

Then, will assemble in advance, cover the main body 1A of seal container 1 thereon from top, integral body is inserted among the main body 1A, supplementary bearing 42 is pressed on the internal surface that is fixed to main body 1A as support frame 4, electric element 3 and the supplementary bearing 42 of Fig. 9.Then, aforesaid locating stud 31,31 is inserted in the pin-and-hole 32,32 of support frame 4.Then, allow as shown in Figure 7 Oldham's coupling 20 1 sides of the vortex compressing member 2 that assembles in advance as side cover down on main body 1A, locating stud 31,31 is inserted in the pin-and-

hole

34,34 of fixed scroll 7, make bolt hole 33... consistent, the pin portion 19 of running shaft 5 is coupled in the axle sleeve hole portion 17 of swing scrollwork 8 with the bolt hole 29... of support frame 4.And, aforesaid bolt 36 is inserted into the bolt hole 33... from fixed scroll 7 one sides, be screwed on the bolt hole 29... of support frame 4 and be fixed up.And, make expulsion valve 61 corresponding with the tap hole 14 of the end plate 11 of fixed scroll 7, be fixed on the end plate 11 by bolt 62,62, be inserted into the communication paths 69 from top pipe 72.This state is exactly a state shown in Figure 3.

Then, allow end cap 1B hot pressing be fixed to around the end plate 11 of fixed scroll 7, by high low pressure sealing cover position main body 1A, at this moment, allow the pipe 72 that erects be inserted in the through hole 71 of end cap 1B at first as shown in Figure 3, allow end cap 1B hot pressing be fitted on the end plate 11 then, cover main body 1A.At this moment, aforesaid communication paths 69 is owing to be positioned at and corresponding position, end cap 1B center, so manage 72 also corresponding with the center of end cap 1B, allow end cap 1B cover main body 1A under the state in being inserted into through hole 71, carry out the location of end cap 1B thus with respect to main body 1A, and assemble easily.The restriction of sense of rotation is also relaxed during in addition, to hot pressing.

Like this, allow hot pressing around the end plate 11 of fixed scroll 7 be fixed to the internal surface of end cap 1B, allowing end cap 1B cover behind main body 1A, welding around the end cap 1B is fixed on the main body 1A.At this moment, on the minor diameter 11B of the end plate 11 of fixed scroll 7, owing to be formed with the depressed part 11C that caves in the direction of leaving mutually from main body 1A with the weld of main body 1A corresponding to end cap 1B, thereby when being welded to end cap 1B on the main body 1A, even its welding heat makes main body 1A inwards be out of shape, bloat, its bellying 76 that has been out of shape is not as shown in Figure 11 to be housed in the depressed part 11C with the contacted mode of minor diameter 11B yet.Thus, by bellying 76 is absorbed in the depressed part 11C, thereby deflection can not take place on the end plate 11 of fixed scroll 7.Therefore, guaranteed sealing between the contacting point 4A of the end plate 11 contacting part 11D of fixed scroll 7 and support frame 4.In addition, the label among Figure 11 74 is weld parts.Afterwards, bottom 1C is covered in the lower end of main body 1A, welding around it is fixing.

Then, the pipe with other is installed in the assembling of just having finished scroll compressor S on the seal container 1.Under this state,, and remain on the seal container 1 by these 2 at the place of being pressed into of chimeric place of hot pressing and supplementary bearing 42 around the end plate 11 of fixed scroll 7 from top in order that vortex compressing member 2, support frame 4, electric element 3 and supplementary bearing 42 is integrated.

Below, the action of scroll compressor S of the present invention is described.If by coming the power supply since terminal T, the rotor 39 of electric element 3 rotates, this rotating force will be sent on the swing scrollwork 8 by running shaft 5.

That is, swing scrollwork 8 is revolved round the sun on circular track under the state with respect to fixed scroll 7 not rotations by Oldham's coupling 20 by driving with respect to these running shaft 5 eccentric axle sleeve hole portions that insert 17 in the pin portion 19 of running shaft 5.And, the compression volume 18 that fixed scroll 7 and swing scrollwork 8 will be formed between their

cover plate

13,16 dwindles towards the inboard successively from the outside, the low pressure chamber 10 of compression in suction pipe 51 flow into seal container 1, again by electric element 3 and flow to the refrigeration agent of the notch 27... of support frame 4.

This refrigeration agent that has compressed is discharged in the hyperbaric chamber 9 from the tap hole 14 of fixed scroll 7, and the valve body 66 of expulsion valve 61 is lifted by the high-pressure refrigerant of discharging from downside tap hole 14, leaves from tap hole 14, opens this tap hole 14, simultaneously, is close to surface of contact 67.The refrigeration agent of discharging from tap hole 14 carries out entering in the hyperbaric chamber 9 from the lateral opening of mobile space portion 64 repeatedly, is discharged to seal container 1 outside from discharge tube 52, has destroyed the circulation that is inhaled into from suction pipe 51 again after the cooling action.

As mentioned above, in the present invention, the end of end cap 1B with all sides of the end plate 11 minor diameter 11B of the fixed scroll 7 that is welded on joint 74 opposite positions on the main body 1A on be formed with depressed part 11C.And, because depressed part 11C is caved on the direction of leaving seal container 1, thereby when allowing the end of end cap 1B be welded on the main body 1A, even at its welding heat the main body 1A of seal container 1 inwards is out of shape under the situation about bloating, this bellying that bloats 76 can not absorb in the depressed part 11C with the contacted mode of minor diameter 11B yet.Thus, can prevent, and then make the performance of scroll compressor S become bad because the heat affecting that the welding of end cap 1B fixedly brings makes fixed scroll 7 deflections.

In addition, owing to be formed with depressed part 11C on the position outside the contacting point 4A of the contacting part 11D of fixed scroll 7 and support frame 4, thereby kept the area of contact between fixed scroll 7 and the support frame 4, thus make sealing keep good.

In addition, owing to separated enough distances to depressed part 11C, therefore can prevent the reduction of the installation strength of fixed scroll 7 and support frame 4 effectively from the fixing bolt hole 33 of fixed scroll 7 and support frame 4 usefulness.Thus, can also safeguard the reliability of scroll compressor S.

Claims

1. scroll compressor, in seal container, be provided with the vortex compressing member, drive the electric element of this vortex compressing member, be provided with the support frame of the bearing portion that supports above-mentioned electric element running shaft in central authorities, and, above-mentioned vortex compressing member is by the fixing fixed scroll that contacts with above-mentioned support frame that uprightly is provided with the scroll cover plate on the surface of end plate, revolve round the sun under the driving of above-mentioned electric element with respect to this fixed scroll on the above-mentioned support frame with being supported on, the upright swing scrollwork that is the scroll cover plate that is provided with constitutes on a side surface of end plate, the a plurality of compression volumes that allow above-mentioned two cover plates be meshing with each other to form dwindle successively by outside-in and compress, and it is characterized in that:

Above-mentioned seal container have main body and with said fixing scrollwork side corresponding position on be fixedly welded on lid on the aforementioned body, on side, be formed with the depressed part that the direction fovea superior that separates with above-mentioned seal container is sagged corresponding to the said fixing scrollwork of this lid and the welding position of main body.

2. scroll compressor as claimed in claim 1 is characterized in that: above-mentioned depressed part be formed on said fixing scrollwork and support frame touching position outside the position.

3. scroll compressor as claimed in claim 1 or 2 is characterized in that: above-mentioned depressed part and fixedly the bolt hole used of said fixing scrollwork and support frame separated enough distances.