CN1256515C

CN1256515C - Vortex compressor

Info

Publication number: CN1256515C
Application number: CN02142270.2A
Authority: CN
Inventors: 相田健二; 杉本和禧; 登义典
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 2001-08-30
Filing date: 2002-08-29
Publication date: 2006-05-17
Anticipated expiration: 2022-08-29
Also published as: JP2003065270A; JP4007780B2; CN1407236A

Abstract

The invention provides a scroll compressor for accurately detecting the discharge temperature. A discharge valve 61 is equipped to the surface of a fixed scroll 7 at the opposite side to the lap 13 of an end plate 11 in correspondence to a discharge hole 14 of the fixed scroll 7, and the discharge valve 61 is equipped with a frame body 63, a valve element 66 which is freely movably provided in the frame body 63 and comes into close contact with the discharge hole 14 to close the discharge hole 14 when an electromotive element is stopped, a contact face 67 with which the valve element 66 comes into contact while separated from the discharge hole 14, and first and second intercommunication paths 68, 69 which are formed to penetrate through the frame body 63 and open to the contact face 67.

Description

Scroll compressor

Technical field

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

Background technique

General scroll compressor structure in the past includes, have the surface upright be provided with constitute the fixed scroll of the end plate of scroll cover plate by involute, have the upright scroll cover plate that constitutes by involute that is provided with in surface, the back side is provided with the end plate of a pair of keyway simultaneously, the swing scrollwork of relative engagement with the said fixing scrollwork, will swing that a plurality of compression volume outside-ins that scrollwork and fixed scroll form dwindle successively and the mode compressed makes the driving mechanism of swing scrollwork with respect to the fixed scroll rotation, allow have the pair of keys that matches with the keyway of above-mentioned swing scrollwork and make the Oldham's coupling (coupling mechanism) of above-mentioned swing scrollwork not revolve round the sun with respect to the mode of fixed scroll rotation.

In addition, be formed with tap hole, simultaneously, on this tap hole, expulsion valve be installed in the end plate central authorities of fixed scroll.This expulsion valve has the body member on the opposite side of cover plate that is installed in fixed swirl end plate, the valve body that moves freely in this body member, this valve body is separated from tap hole by the pressure of tap hole under the state of driving mechanism running, contacts with the surface of contact of body member.Like this, when driving mechanism stopped, this valve body was close to and forms sealing on the tap hole.

In addition, on the body member of this expulsion valve, be provided with and be opened on the communication paths that forms perforation on the surface of contact, when driving mechanism stops, being applied on the valve body as back pressure by making the pressure of installing in the container, thereby sealing tap hole rapidly by valve body.

Summary of the invention

Yet, this scroll compressor is by the running of driving mechanism, and perhaps, the slip by each scrollwork has produced heat, situation according to load can make the temperature anomaly of scroll compressor rise by this heating, the situation that driving mechanism insulation fault or scrollwork burn can occur.

For this reason, in this scroll compressor in the past, be equipped with and detect the temperature-detecting device that the highest discharge temperature of temperature is used, this temperature-detecting device is in controls such as the moment that detects abnormal high temperature shut down, and because temperature-detecting device normally is installed on seal container or discharge conduit, thereby be difficult to correctly detect this discharge temperature.

The objective of the invention is to solve the problem in this conventional art, a kind of scroll compressor that can correctly detect discharge temperature is provided.

Scroll compressor of the present invention is by accommodating vortex compressing member and driving mechanism in the seal container, simultaneously, the vortex compressing member is by the upright fixed scroll that is the scroll cover plate that is provided with on the surface of end plate, and with end sheet surface that this fixed scroll is meshed on the upright swing scrollwork that is the scroll cover plate that is provided with constitute, by driving mechanism the swing scrollwork is revolved round the sun with respect to fixed scroll, a plurality of compression volumes of being formed by swing scrollwork and fixed scroll are dwindled towards the inboard successively from the outside to be compressed, it is characterized in that: it has the tap hole on the end plate that is formed at fixed scroll, with the expulsion valve on the corresponding opposite side of cover plate that is arranged at fixed swirl end plate of this tap hole, this expulsion valve has body member, be arranged on with can move freely and when driving mechanism stops, be close to the valve body that seals on the tap hole in this body member, be formed on the body member at valve body and leave contacted surface of contact under the state of tap hole, breakthrough form is formed in 1st and 2nd communication paths of body member upper shed on surface of contact.

The scroll compressor of the 2nd invention is characterized in that: the 1st communication paths recited above be opened on from the center of valve body on the surface of contact of the corresponding part of external position.

The scroll compressor of the 3rd invention is characterized in that: be inserted with temperature-detecting device on the 2nd communication paths in above-mentioned each invention.

The scroll compressor of the 4th invention, it is characterized in that: the center of valve body recited above is consistent with the center of tap hole, simultaneously, the 2nd communication paths is configured on the position corresponding to seal container end cap center, the through hole of the insertion temperature-detecting device that is formed centrally in this end cap.

According to the present invention, by accommodating vortex compressing member and driving mechanism in the seal container, simultaneously, the vortex compressing member is by the upright fixed scroll that is the scroll cover plate that is provided with on the surface of end plate, and with end sheet surface that this fixed scroll is meshed on the upright swing scrollwork that is the scroll cover plate that is provided with constitute, by driving mechanism the swing scrollwork is revolved round the sun with respect to fixed scroll, a plurality of compression volumes of being formed by swing scrollwork and fixed scroll are dwindled towards the inboard successively from the outside to be compressed, in this compressor, have the tap hole on the end plate that is formed at fixed scroll, with the expulsion valve on the corresponding opposite side of cover plate that is arranged at fixed swirl end plate of this tap hole, this expulsion valve has body member, be arranged on with can move freely and when driving mechanism stops, be close to the valve body that seals on the tap hole in this body member, be formed on the body member at valve body and leave contacted surface of contact under the state of tap hole, breakthrough form is formed in 1st and 2nd communication paths of body member upper shed on surface of contact, therefore, by utilizing temperature-detecting device is installed as the 2nd communication paths of the 3rd invention, can be with temperature-detecting device by after just passing through tap hole, and near the object temperature the tap hole detects discharge temperature.

Thus, the correct discharge temperature of perception scroll compressor can be avoided effectively because abnormal high temperature and scroll compressor is produced the problem of damage.

According to the 2nd invention, since on the basis of the above the 1st communication paths is opened on from the center of valve body on the surface of contact of the corresponding part of external position, thereby applied back pressure in position outwardly, center from valve body, the situation that applies back pressure with center at valve body is compared, and is easier to make the valve body that is close on the surface of contact to break away from.Thus, can more promptly realize of the sealing of the valve body of expulsion valve to tap hole.

According to the 4th invention, owing to make the center of valve body consistent on the basis of the above with the center of tap hole, therefore, valve body can have no obstacle ground to the on-off action of tap hole to carry out, simultaneously, because the 2nd communication paths is configured on the position corresponding to seal container end cap center, in this end cap, be formed centrally and insert the through hole that temperature-detecting device is used, therefore, under being inserted into state in the 2nd communication paths, temperature-detecting device make temperature-detecting device pass the through hole of end cap, thus the location temperature-detecting device can be installed as end cap the time.In addition, under the situation of the chimeric end cap of hot pressing, the restriction of sense of rotation is also relaxed during to this hot pressing.Thus, can help to improve the operation of compressor assembling.

Description of drawings

Fig. 1 is vertical sectional side view of being 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 a compressor part cuts that revolves in Fig. 1 whirlpool.

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

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

Fig. 5 is the front view of the scroll compressor circuit wiring part of Fig. 1.

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

Fig. 7 is vertical sectional 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 vertical sectional side view of support frame.

Figure 10 is the expulsion valve amplification view partly of the scroll compressor of Fig. 1.

Figure 11 is expulsion valve another amplification view partly of the scroll compressor of Fig. 1.

Embodiment

Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.Fig. 1 is vertical sectional side view of being 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 vertical sectional 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 front view of wiring part T 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 vertical sectional 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 vertical sectional side view of support frame 4.

In each figure, the 1st, peviform 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 constitute.Like this, in this airtight seal container 1, accommodating electric element 3 respectively as the driving mechanism of vortex compressing member 2 usefulness of the vortex compressing member 2 that drives upside, downside.Accommodating support frame 4 in the seal container 1 between this vortex compressing member 2 and electric element 3, in this support frame 4 towards below the outstanding bearing portion 6 that forms central supporting rotating shaft 5.

Above-mentioned vortex compressing member 2 is made of fixed scroll 7 and swing scrollwork 8.Hot pressing is entrenched on the end cap 1B internal surface of seal container 1 around the fixed scroll 7, by this seal container 1 internal separation being gone out the discoideus end plate 11 of hyperbaric chamber 9 and low pressure chamber 10 and uprightly being arranged on the involute shape of these end plate 11 another 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.Like this, 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 another 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 makes 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, is configured to the mode of engagement relatively, forms a plurality of compression volumes 18 between

inner cover plate

13,16.

The 19th, be inserted into the pin portion in the axle sleeve hole 17 of the set swing scrollwork 8 of running shaft 5 front ends (upper end), 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 the pair of

keys

21,21 that is forming protruding on the relative position then, and be a pair of

keyway

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

keys

21,21.

On the other 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, according to the Oldham's coupling 20 of this matching relationship swing scrollwork 8 is revolved round the sun on circular track in the mode with respect to fixed scroll 7 rotations not.

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 the 90 degree positions of staggering from peripheral portion towards the inboard, by this 4 place notch 27 ... state with the 90 degree positions of whenever staggering forms the installation arm 28 that is projected into foreign side and below from thrust bearing surface 26 respectively ...Like this, at this arm 28 is installed ... peripheral portion above be formed with bolt hole 29 at 2 places respectively.In addition, 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 installation arm 28 of this support frame 4 ... external diameter, that is, the external diameter of support frame 4 is set at the internal diameter less than seal container 1 main body 1A.

On the other hand, on end plate 11 peripheral portions of fixed scroll 7 also in the bolt hole 29 of the above-mentioned support frame 4 of correspondence ... the position form the bolt hole 33 that 8 places connect, simultaneously, on the peripheral portion of the another 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, insert respectively under the state of above-mentioned locating stud 31, bolt 36 is inserted into spiral shell verify 33 at these paired pin-and-holes 32 and 34 ... in, by with the bolt hole 29 of support frame 4 ... be screwed in together, thereby fixed scroll 7 is fixed on the 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 (stator) 38 and in this stator 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.The downside of the pin portion 19 of running shaft 5 front ends is formed with the crank portion 41 in the bearing portion 6 that is supported on support frame 4, and 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.In addition, at the installation arm 28 of support frame 4 ... the corresponding position of following and through hole 44 on also be formed with bolt hole 46.Like this, bolt 47 is inserted in the bolt hole 43 of supplementary bearing 42, be screwed on the bolt hole 46 of support frame 4 by the through hole 44 that connects stator 38, 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 base part 49 of shape shown in Figure 5.This base part 49 constitutes by main body 1A is just taken a seat inwardly from the outside, and the wiring part T that is connected on the electric element 3 is installed on this base part 49.This base part 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 base part 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, to be in mode in the notch 27,27 with the notch 27 of these base part 49 present positions 90 degree of being separated by, that is, dispose fixed scroll 7 or swing scrollwork 8, Oldham's coupling 20 in the mode that the

key

24,24 of fixed scroll 7 roughly is set at interval with the base part 49 that wiring part T is installed 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, in a single day the position of this key member 24 is positioned at the direction of wiring part T, key member 24 will interfere with wiring part T, the position of the vortex compressing member 2 of this part just exceeds, then must increase the size of scroll compressor S, the 90 degree configurations because aforesaid key member 24 and wiring part T are separated by, thereby can not interfere, the expansion of this size can be prevented.

In addition, when base part 49 is taken a seat, main body 1A produces distortion, owing to set the external diameter 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 ... formation imports refrigeration agent from low pressure chamber 10 path of vortex compressing member 2.

54, the 56th, chimeric or be pressed into balace weight (balancer weight) on the running shaft 5 of the rotor 39 that is 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, in addition, utilize the space of bearing portion 6 peripheries of support frame 4, 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 (being represented by arrow R among Fig. 9) moves up, is near the periphery of the bearing portion 6 the swing scrollwork 8.Thus, balace weight 54 is lightened, eliminated the vibration that produces along with the eccentric motion of pin portion 19 effectively.In addition, the bending of running shaft 5 also is reduced, thereby can suppress the problem of crank portion 41 and bearing portion 6 OFFSET COLLISION.

Below, 61 are mounted in the expulsion valve on fixed scroll 7 end plates 11 another sides (with the uper side surface of cover plate 13 opposite examples).This expulsion valve 61 is by roughly being the support body 63 of a font with the corresponding sections of being installed by

bolt

62,62 of tap hole 14 of end plate 11, but and in the side of this support body 63 and the open easy on and off that forms of evolution 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.Like this, 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 in position that staggers from valve body 66 centers.On the other hand, the 2nd communication paths 69 is positioned at and the corresponding position of end cap 1B central lower, but also has been formed centrally through hole 71 in end cap 1B.Like this, insert the pipeline 72 as a temperature-detecting device part not shown in the figures on the 2nd communication paths 69, this pipeline 72 is drawn out to the outside by through hole 71.In this pipeline 72, burying the temperature-sensitive portion of temperature-detecting device.

Below, the assembling sequence of scroll compressor S of the present invention is described.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.Like this, 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 will have 54,56 combinations of running shaft 5 and balace weight 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, crank portion 41 insertions of running shaft 5 are 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.This is such just as state shown in Figure 9.

On the other hand, with fixed scroll 7,, make

cover plate

13 and 16 engagements thereon so that cover plate 13 mode mounting up covers cover plate 16 swing scrollwork 8 down.Then, with Oldham's coupling 20,

key

21,21, matches in

key

21,21 and the

keyway

23,23 of swinging scrollwork 8 on swing scrollwork 8 as the downside mounting.Then, be separated by 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 these

keys

21,21 and keyway 23,23.So just, assembled vortex compressing member 2 shown in Figure 7.

Then, as shown in Figure 9 support frame 4, electric element 3 and supplementary bearing 42 assembled 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.Then, aforesaid

support locating stud

31,31 is inserted in the pin hole 32,32 of framework 4.Then, Oldham's coupling 20 sides that make the vortex compressing member 2 that assembles in advance as shown in Figure 7 cover main body 1A below being, locating

stud

31,31 is inserted in the pin-and-hole 34,34 of fixed scroll 7, make bolt hole 33 ... bolt hole 29 with support frame 4 ... consistent, the pin portion 19 of running shaft 5 is coupled in the axle sleeve hole portion 17 of swing scrollwork 8.Like this, aforesaid bolt 36 is inserted into bolt hole 33 from fixed scroll 7 one sides ... in, be screwed in the bolt hole 29 of support frame 4 ... on be fixed up.Like this, make expulsion valve 61 corresponding, be fixed on the end plate 11, pipeline 72 is inserted into the communication paths 69 from top by

bolt

62,62 with the tap hole 14 of the end plate 11 of fixed scroll 7.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, cover main body 1A by the high low pressure sealing, at this moment, the pipeline 72 that erects is inserted in the through hole 71 of end cap 1B,, covers main body 1A allowing end cap 1B hot pressing be fitted on the end plate 11 under this state.At this moment, aforesaid communication paths 69 is owing to be positioned at and the corresponding position of end cap 1B central lower, and pipeline 72 is also corresponding with the center of end cap 1B, make end cap 1B cover main body 1A under the state in being inserted into through hole 71, therefore carry out location and the assembling of end cap 1B easily with respect to main body 1A.The restriction of sense of rotation is also relaxed during in addition, to hot pressing.

Like this, the internal surface hot pressing of end cap 1B is fixed to around the end plate 11 of fixed scroll 7, after making end cap 1B cover main body 1A, welding around the end cap 1B is fixed on the main body 1A.Afterwards, bottom 1C is covered in the lower end of main body 1A, welding around it is fixing.Like this, other piping erection has just been finished the assembling of scroll compressor S on seal container 1.Under this state, from top in order that vortex compressing member 2, support frame 4, electric element 3 and supplementary bearing 42 is integrated, 2 at the place of being pressed into by chimeric place of hot pressing and supplementary bearing 42 around the end plate 11 of fixed scroll 7 remains on the seal container 1.

Below, the action of scroll compressor S of the present invention is described.In case from wiring part T power supply, the rotor 39 of electric element 3 just can rotate, this rotating force will be sent on the swing scrollwork 8 by running shaft 5.

That is, pendulum 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 the eccentric axle sleeve hole portion that inserts 17 in the axle center of this running shaft 5 in the pin portion 19 of running shaft 5.Like this, constituting the compression volume 18 that will be formed between their

cover plate

13,16 by fixed scroll 7 and swing scrollwork 8 dwindles towards the inboard successively from the outside, the low pressure chamber 10 in suction pipe 51 flow into seal container 1, flow to the notch 27 of support frame 4 by electric element 3 compressions ... refrigeration agent.

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, has opened this tap hole 14, simultaneously, fit tightly on surface of contact 67 (with reference to Figure 10).The refrigeration agent of discharging from tap hole 14 enters in the hyperbaric chamber 9 from the lateral opening of mobile space portion 64, is discharged to outside the seal container 1 from discharge tube 52.

On the other hand, in case electric element 3 stops, the rotation of rotor 39 just stops, owing to aforesaid compression stops, and therefore in order to make pressure balance, just can adverse current by tap hole 14 gases.And owing on surface of contact 67, have communication paths 68, be connected, thereby the pressure in this hyperbaric chamber 9 will draw back valve body 66 as back pressure from surface of contact 67, fall the below and close tap hole 14 (with reference to Figure 11) with hyperbaric chamber 9.At this moment, communication paths 68 is owing to surface of contact 67 upper sheds in the central position of leaving valve body 66, so valve body 66 is in from the state of the position separating of close its edge part.Thus, seal rapidly by 66 pairs of tap holes 14 of valve body.

In addition, the temperature-sensitive portion of built-in temperature detection device in this pipeline 72 is that control gear not shown in the figures stops the protection action of electric element 3 under the situation of the abnormal high temperature be scheduled in this detected discharge temperature of temperature-sensitive portion (refrigerant temperature of discharge).At this moment temperature-detecting device is after tap hole 14, and, the refrigerant temperature of can perception discharging by near the object temperature the tap hole 14, thereby the correct discharge temperature of perception scroll compressor S can be avoided effectively because abnormal high temperature and scroll compressor S is produced the problem of damage.

In addition, among the embodiment, be to be formed with 4 places on support frame 4 the state that arm 28 is installed to be set every 90 degree positions, notch 27 is formed 3 places (per 120 degree positions), arm 28 is installed also is fine thereby form 3 places, perhaps, also be fine more than arm 28 formation 5 places will be installed.But under any circumstance, all to come slit configuration portion 27 with above-mentioned wiring part T and the not corresponding to mode of key member 24.

Claims

1. screw compressor; By accommodating scroll compression element and driving mechanism in the closed container; Simultaneously; Above-mentioned scroll compression element is by the upright fixed scroll that is the scroll cover plate that arranges on the surface of end plate; And with end sheet surface that this fixed scroll is meshed on the upright swing scrollwork that is the scroll cover plate that arranges consist of; By above-mentioned driving mechanism the swing scrollwork is revolved round the sun with respect to above-mentioned fixed scroll; Make a plurality of compression strokes that formed by above-mentioned swing scrollwork and fixed scroll dwindle successively to form compression from the outside towards the inboard

It also has the tap hole on the end plate that is formed at the said fixing scrollwork, with the expulsion valve on the corresponding opposite side of cover plate that is arranged at the said fixing swirl end plate of this tap hole,

This expulsion valve has, body member, be arranged on with can move freely and when driving mechanism stops, be close to the valve body that seals on the above-mentioned tap hole in this body member, be formed on the said frame body and leave the surface of contact that contacts under the state of tap hole at above-mentioned valve body, breakthrough form is formed in 1st and 2nd communication paths of said frame body upper shed on above-mentioned surface of contact, it is characterized in that

Above-mentioned the 1st communication paths is opened on from the above-mentioned surface of contact of the center corresponding part in position outwardly of above-mentioned valve body.

2. screw compressor; By accommodating scroll compression element and driving mechanism in the closed container; Simultaneously; Above-mentioned scroll compression element is by the upright fixed scroll that is the scroll cover plate that arranges on the surface of end plate; And with end sheet surface that this fixed scroll is meshed on the upright swing scrollwork that is the scroll cover plate that arranges consist of; By above-mentioned driving mechanism the swing scrollwork is revolved round the sun with respect to above-mentioned fixed scroll; Make a plurality of compression strokes that formed by above-mentioned swing scrollwork and fixed scroll dwindle successively to form compression from the outside towards the inboard

Above-mentioned the 1st communication paths is opened on from the above-mentioned surface of contact of the center corresponding part in position outwardly of above-mentioned valve body;

Be inserted with temperature-detecting device on above-mentioned the 2nd communication paths.

3. screw compressor; By accommodating scroll compression element and driving mechanism in the closed container; Simultaneously; Above-mentioned scroll compression element is by the upright fixed scroll that is the scroll cover plate that arranges on the surface of end plate; And with end sheet surface that this fixed scroll is meshed on the upright swing scrollwork that is the scroll cover plate that arranges consist of; By above-mentioned driving mechanism the swing scrollwork is revolved round the sun with respect to above-mentioned fixed scroll; Make a plurality of compression strokes that formed by above-mentioned swing scrollwork and fixed scroll dwindle successively to form compression from the outside towards the inboard

Be inserted with temperature-detecting device on above-mentioned the 2nd communication paths;

Make the center of above-mentioned valve body consistent, simultaneously, above-mentioned the 2nd communication paths is configured on the position corresponding to above-mentioned seal container end cap center the through hole of the insertion said temperature detection device that in this end cap, is formed centrally with the center of tap hole.