CN203962407U - Rotary compressor and there is its freezing cycle device - Google Patents

Abstract

The utility model discloses a kind of rotary compressor and there is its freezing cycle device.Rotary compressor comprises: cylinder assembly, two bearings and venting gas appliance.At least one bearing is provided with exhaust passage, exhaust passage comprises center cavity and a circumferential groove, center cavity runs through corresponding bearing on above-below direction, circumferential groove is around at least a portion setting of center cavity, the part between center cavity and circumferential groove of bearing limits pipe portion, and pipe portion is provided with a plurality of intercommunicating pores to be communicated with center cavity and circumferential groove.Venting gas appliance comprises outlet valve and limiting board, and outlet valve is located at exhaust port place, and limiting board is located in pipe portion and is positioned at the side away from exhaust port of outlet valve.According to rotary compressor of the present utility model, can improve the rigidity of bearing, improve the deformation quantity of compression chamber, the piston clearance of eccentric rotary can minimize, and has improved the efficiency of compressor.

Description

Rotary compressor and there is its freezing cycle device

Technical field

The utility model relates to refrigerating field, especially relates to a kind of rotary compressor and has its freezing cycle device.

Background technique

The bearing of the rotary compressor in the past of configuration tongue type outlet valve, because the area of valve accommodating groove is large, so also thin rigidity is low in its bottom surface.Its result, the increase of being out of shape due to compression chamber causes loss in efficiency, because bearing deformation causes reliability, reduces.

Model utility content

The utility model is intended to solve at least to a certain extent one of technical problem in correlation technique.

For this reason, an object of the present utility model is to propose a kind of rotary compressor, improves the deformation quantity of compression chamber, has improved the efficiency of compressor.

Another object of the present utility model is to propose a kind of freezing cycle device with above-mentioned rotary compressor.

According to rotary compressor of the present utility model, comprising: cylinder assembly, described cylinder assembly comprises the cylinder with compression chamber, two bearings, described two bearings are located at respectively upper surface and the lower surface of described cylinder assembly, described at least one, bearing is provided with the exhaust passage being communicated with described compression chamber, described exhaust passage comprises center cavity and a circumferential groove, described center cavity runs through corresponding described bearing on above-below direction, one end towards described cylinder of described center cavity limits exhaust port, described circumferential groove is recessed along the direction towards described cylinder from the end face away from described cylinder of described bearing, described circumferential groove is around at least a portion setting of described center cavity, the part between described center cavity and described circumferential groove of described bearing limits pipe portion, described pipe portion is provided with a plurality of intercommunicating pores to be communicated with described center cavity and described circumferential groove, venting gas appliance, described venting gas appliance comprises outlet valve and limiting board, described outlet valve is located at described exhaust port and sentences and open or close described exhaust port, described limiting board be located in described pipe portion and the side away from described exhaust port that is positioned at described outlet valve to limit the moving displacement of described outlet valve.

According to rotary compressor of the present utility model, by integrated venting gas appliance in center cavity, can improve the rigidity of bearing, thereby improve the deformation quantity of compression chamber.Deformation quantity due to compression chamber improves simultaneously, and the piston clearance of eccentric rotary can minimize, and has improved the efficiency of compressor.

In addition, according to the above-mentioned rotary compressor of the utility model, can also there is following additional technical characteristics:

In embodiments more of the present utility model, described circumferential groove is circular groove.

In other embodiments of the present utility model, described circumferential groove forms C shape.

According to embodiments more of the present utility model, described limiting board is enclosed within outward on the periphery wall of described pipe portion, described outlet valve comprises body and a plurality of projection, described a plurality of projection stretches out and evenly spaced apart from the periphery wall of described body respectively, and described body is positioned at described center cavity and described a plurality of projection extend into described circumferential groove from described a plurality of intercommunicating pores respectively.

In further embodiment of the present utility model, rotary compressor also comprises elastic component, and the two ends of described elastic component are only against respectively on described limiting board and described outlet valve.

Alternatively, described elastic component is line style coil spring or non-linearity coil spring.

According to other embodiments of the present utility model, the inner circle wall of described pipe portion is provided with the restraining groove that holds described limiting board.

According to further embodiment of the present utility model, described outlet valve is a plurality of and superposes on above-below direction.

According to embodiments more of the present utility model, at cylinder in the radial direction, the outside at the center that is centered close to described center cavity of described circumferential groove.

According to freezing cycle device of the present utility model, comprise the rotary compressor above-mentioned according to the utility model.

Accompanying drawing explanation

Fig. 1 is relevant to embodiment 1 of the present utility model, represents the longitudinal section of rotary compressor inside;

Fig. 2 is relevant to embodiment 1, the planimetric map of the slot part of the venting gas appliance configuring on main bearing;

Fig. 3 is relevant to embodiment 1, forms the decomposing schematic representation of venting gas appliance;

Fig. 4 is relevant to embodiment 1, represents the sectional view of venting gas appliance;

Fig. 5 is relevant to embodiment 1, represents the planimetric map of venting gas appliance;

Fig. 6 is relevant to embodiment 1, the performance plot of line style and non-linear spring;

Fig. 7 is relevant to embodiment 1, the planimetric map of the slot part of venting gas appliance;

Fig. 8 is relevant to embodiment 1, the planimetric map of the slot part of venting gas appliance;

Fig. 9 is relevant to embodiment 2 of the present utility model, the planimetric map of the slot part of the venting gas appliance configuring on main bearing;

Figure 10 is relevant to embodiment 2, the planimetric map of expression venting gas appliance;

Figure 11 is relevant to embodiment 2, the component diagram of formation venting gas appliance.

Embodiment

Describe embodiment of the present utility model below in detail, described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment who is described with reference to the drawings, be exemplary, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.

In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of indications such as " circumferentially " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.

In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characteristics.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.

In the utility model, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or be integral; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.

Below with reference to Fig. 1-Figure 11, describe in detail according to the utility model embodiment's rotary compressor.Wherein rotary compressor can be single cylinder rotary compressor or twin-tub rotation-type compressor, and rotary compressor can also vertical compressor, horizontal compressor, wave rotary compressor, housing low pressure formula rotary compressor or 2 stage compressors.Rotary compressor can be applied in the freezing cycle devices such as aircondition, refrigeration plant or water heater.

Rotary compressor according to the utility model embodiment, comprising: cylinder assembly, two bearings and venting gas appliance.Cylinder assembly comprises the cylinder 40 with compression chamber 41.Two bearings are located at respectively upper surface and the lower surface of cylinder assembly, and at least one bearing is provided with the exhaust passage being communicated with compression chamber 41.In other words, main bearing 50 is located at the upper surface of cylinder assembly, and supplementary bearing 55 is located at the lower surface of cylinder assembly, and main bearing 50 and/or supplementary bearing 55 are provided with exhaust passage.

Exhaust passage comprises center cavity 11 and a circumferential groove 15, center cavity 11 runs through corresponding bearing on above-below direction, one end towards described cylinder of center cavity 11 limits exhaust port 13, circumferential groove 15 is recessed along the direction towards cylinder from the end face away from cylinder of bearing, circumferential groove 15 is around at least a portion setting of center cavity 11, the part between center cavity 11 and circumferential groove 15 of bearing limits pipe portion 19, and pipe portion 19 is provided with a plurality of intercommunicating pores 12 to be communicated with center cavity 11 and circumferential groove 15.That is to say, center cavity 11 and circumferential groove 15 are by intercommunicating pore 12 conductings.

Venting gas appliance comprises outlet valve 20 (or 23) and limiting board 22, outlet valve 20 is located at exhaust port 13 and sentences and open or close exhaust port 13, and limiting board 22 is located in pipe portion 19 and is positioned at the side away from exhaust port 13 of outlet valve 20 with the moving displacement of restriction outlet valve 20.In concrete example of the present utility model, in center cavity 11, be provided with valve seat 14, outlet valve 20 is located on valve seat 14 to close exhaust port 13.

The venting gas appliance of take is below located on main bearing as example is described the flow direction of gas: the pressurized gas of compression chamber 41 interior compressions are drained in exhaust port 13, under the effect of pressurized gas, outlet valve 20 floats to open exhaust port 13, pressurized gas branch to intercommunicating pore 12 comparably from outlet valve 20 underside gap of floating, part pressurized gas are drained into circumferential groove 15 from intercommunicating pore 12, and pressurized gas are drained on the exhaust silencer 51 being located at bearing from center cavity 11 and circumferential groove 15.Be understandable that, when venting gas appliance is located on supplementary bearing, the flow principles of gas is identical with above-mentioned flow principles, just repeats no more here.

According to the utility model embodiment's rotary compressor, by integrated venting gas appliance in center cavity 11, can improve the rigidity of bearing, thereby improve the deformation quantity to compression chamber inside.Deformation quantity due to compression chamber improves simultaneously, and the piston clearance of eccentric rotary can minimize, and has improved the efficiency of compressor.

In embodiments more of the present utility model, circumferential groove 15 is circular groove, and for example circumferential groove 15 can form circle, ellipse or square.In other embodiments of the present utility model, circumferential groove 15 forms C shape.

In embodiments more of the present utility model, as shown in Fig. 9 and Figure 11, limiting board 22 is outer to be enclosed within on the periphery wall of pipe portion 19, outlet valve 23 comprises body 23a and a plurality of protruding 23b, a plurality of protruding 23b stretch out and evenly spaced apart from the periphery wall of body 23a respectively, body 23a is positioned at center cavity 11 and a plurality of protruding 23b extend into circumferential groove 15 from a plurality of intercommunicating pores 12 respectively, and the number of its protrusions 23b can be less than or equal to the number of intercommunicating pore 12.In other embodiments of the present utility model, as shown in Figure 4, the inner circle wall of pipe portion 19 is provided with the restraining groove 17 that holds limiting board.

In further embodiment of the present utility model, rotary compressor also comprises elastic component 21 (or 25), and the two ends of elastic component are only against on limiting board and outlet valve respectively.Thereby can, when controlling the motion posture of outlet valve, prevent that outlet valve from directly contacting with limiting board, can reduce noise.Particularly, elastic component is line style coil spring or non-linearity coil spring.

In embodiments more of the present utility model, outlet valve is a plurality of and superposes on above-below direction.

As shown in Figure 7, according to embodiments more of the present utility model, at cylinder in the radial direction, the outside at the center that is centered close to center cavity of circumferential groove, in other words, circumferential groove eccentric setting.Thereby can reduce air resistance.

According to the utility model embodiment's freezing cycle device, comprise the rotary compressor above-mentioned according to the utility model.

Below with reference to Fig. 1-Figure 11, describe in detail according to the rotary compressor of several specific embodiments.

Embodiment 1:

Embodiment's 1 of the present utility model form is shown in Fig. 1.Rotary compressor by be arranged on housing 2 inner radius compression mechanical part 4, the motor portion 3 of its top configuration form.In the compression chamber 41 that compression mechanical part 4 possesses cylinder 40, form in this cylinder, carry out off-centre operation piston 45, with this piston carry out synchronous reciprocating motion slide plate (without diagram), the eccentric shaft 60 of driven plunger 45, to this eccentric shaft 60 slides main bearing 50 and the supplementary bearing 55 of support.

Main bearing 50 and supplementary bearing 55 by long bearing 50a and main bearing flange 50b, minor axis, hold 55a respectively and supplementary bearing flange 55b forms.Main bearing flange 50b and supplementary bearing flange 55b are fixed in cylinder 40, form the compression chamber 41 of sealing together with cylinder.Venting gas appliance 10 of the present utility model can be configured in a side or two sides of main bearing flange 50b or supplementary bearing flange 55b, but in embodiment 1, configures venting gas appliance 10, at an upper portion thereof exhaust silencer 51 is installed in main bearing flange 50b.

The same with common rotary compressor, in compression chamber 41, the pressurized gas of compression are by being discharged to exhaust silencer 51 from venting gas appliance 10 exhaust port 13 of compression chamber 41 openings.From outlet pipe (without diagram) be discharged to refrigerating circulatory device thereafter.Therefore, the internal pressure of housing 2 is high pressure side.

First, before venting gas appliance 10 is elaborated, the figure relevant to venting gas appliance 10 describes.

Fig. 2 is the planimetric map of the groove processing department 30 of processing in the main bearing flange 50b before 3 parts of the assembling shown in Fig. 3.Fig. 3 is the limiting board 22 of outlet valve 20, coil spring 21, C shape ring from the order of below.Fig. 4 is completing figure, representing the details in its cross section of the venting gas appliance 10 that possesses on main bearing flange 50b.Fig. 5 is the planimetric map of venting gas appliance 10.

In Fig. 2, groove processing department 30 possesses: the outside of the exhaust port 13 that the center cavity 11 of (1) cylinder and the bottom of center cavity 11 possess and valve seat 14, (2) center cavity 11, around the circular circumferential groove 15,3 of center cavity 11 configurations) 4 intercommunicating pores 12 being communicated with betwixt, (4) are by the processing of intercommunicating pore 12, the restraining groove 17 (Fig. 4) of the valve guide portion 11a of 4 cylindrical portions that interior week of center cavity 11 is residual, the 11 inner radius processing of (5) center cavity.In addition, the valve seat 14 of exhaust port 13 and the processing of this periphery is concentric with the internal diameter of center cavity 11.

Circumferential groove 15 is processed with core with center cavity 11, so formed the upright pipe portion 19 in circumferential groove 15 center.Centered by the internal side diameter of this pipe portion 19, chamber 11.4 intercommunicating pores 12 are the gas channel of processing in pipe portion 19, are communicated with center cavity 11 and circumferential groove 15.12 4 residual cylindrical column of intercommunicating pore, for only allowing outlet valve 20 moving up and down, limited the valve guide portion 11a of the action of substantially horizontal.In addition, restraining groove 17 is arranged on 4 circular troughs in valve guide portion 11a, concentric with center cavity 11.

Circumferential groove 15 has conical surface 15a (Fig. 4), towards bottom direction internal diameter, diminishes, and circumferential groove 15 is contrary cone type.Circumferential groove 15 is that contrary conical reason is the drag reduction of the exhaust air flow from exhaust port 13 to circumferential groove 15, and prevents that the bottom surface rigidity of center cavity 11 from reducing.

As mentioned above, valve guide portion 11a has 4 guide portions, to guarantee that outlet valve 20 carries out knee-action smoothly in correct position.Therefore, the external diameter of outlet valve 20 is more a little bit smaller than the internal diameter of center cavity 11.In addition, 4 intercommunicating pores 12 are from exhaust port 13 exhaust out, to import the gas channel circumferential groove 15 in outlet valve 20 floatings.So, the valve guide portion 11a and the intercommunicating pore 12 that in pipe portion 19, form have play a part important.In addition, the quadrangle of the about same size of external diameter of the outlet valve 20 of the interior Zhou Weiyu circle of center cavity 11 can not have obstruction to the action of outlet valve 20 yet.At this moment, the gas channel that the gap forming on four of center cavity 11 angles is exhaust port.

Next, assembling method is described.First, in center cavity 11, insert in outlet valve 20 and coil spring 21, limiting board 22 embedding restraining grooves 17 and just complete and assembled (Fig. 4, Fig. 5).The central part of limiting board 22 can be opened large mouthful, so the high pressure above of outlet valve 20 easily acts on, the closing of valve seat 14 of bringing due to outlet valve 20 postpones just can not occur.In addition, as limiting board 22, adopted C shape limited ring.

Its result, due to the initial stage load of coil spring 21, outlet valve 20 falls into (Fig. 4) on valve seat 14.On the other hand, the lower end surface of coil spring 21 conventionally with above outlet valve 20 contacts and can stretch.In addition, due to the position of elastic force and the limiting board 22 of coil spring 21, the stroke of outlet valve 20 (knee-action amplitude) is certain.As a reference, represented in Fig. 5 the position of slide plate (46) to represent the position relationship with venting gas appliance 10.Dotted line is the internal diameter of compression chamber 41 in addition.

Next, according to Fig. 4, the effect of venting gas appliance 10 is described.

By the revolution of piston 45, compression chamber 41 is when arriving exhaust pressure, and outlet valve 20 floats from valve seat 14, exhaust port 13 perforates, and also along with the increase of exhaust, the aperture of exhaust port 13 also increases.At this moment, coil spring 21 can further compress, and air displacement arrives maximum time, and the path increment of outlet valve 20 be maximum, in a flash, on the top of coil spring 21, stops.

Thereafter, because air displacement reduces, outlet valve 20 starts sharply to decline, and air displacement is 0 or compression chamber 41 while being switched to the moment of low pressure, and outlet valve 20 drops on and on valve seat 14, closes exhaust port 13.The pressurized gas of discharging from exhaust port 13 in above-mentioned exhaust stroke, are discharged in noise elimination cavity 31 comparably to circumferential groove 15 shuntings from 4 intercommunicating pores 12.

In above stroke, the lateral attitude displacement of 4 valve guide portion 11a restriction outlet valves 20, makes the knee-action of outlet valve 20 smooth and easy.And coil spring 21, because elastic force compresses outlet valve 20 conventionally towards the direction of valve seat 14, is controlled the posture of outlet valve 20, and it is moved up and down with valve seat 14 is parallel.

Therefore, the design of shape design, elastic force and the spring constant of the circumferential play of outlet valve 20, coil spring 21 and the stroke of outlet valve 20 long (S) is extremely important.But, need to be according to the kind of compressor refrigerating capacity, service condition, refrigerant, and the rotational speed of eccentric shaft etc. is optimized above-mentioned design.

The stroke long (S) of outlet valve 20 is compared with tongue type valve in the past, can be little a lot.Reason is: tongue type valve in the past be take fixed end as fulcrum, can move up and down sideling, so exhaust port pressurized gas out are mainly discharged towards the first extreme direction of tongue type valve.But outlet valve 20 of the present utility model moves up and down with valve seat 14 is parallel, so shunt on an equal basis towards 4 intercommunicating pores 12 from exhaust port 13 pressurized gas out.That is,, in the utility model, can measure by less Valve travel large air displacement.

For above-mentioned reasons, in the compressor that discharge flow rate is few, the path increment of outlet valve 20 can diminish.Therefore, also no problem even omit the stability aspect of 21 pairs of outlet valves 20 of spring.In addition, can to do little feature be also favourable to reducing noise to knee-action length.In addition, in embodiment 1, the quantity of intercommunicating pore 12 is 4 but can increases and decreases number as required.And if the opening area of each intercommunicating pore 12 increases, the exhaust of adjusting by intercommunicating pore 12 can reduce air resistance.

In embodiment 1,4 intercommunicating pores 12 are equal angles (90 degree) configurations, so, as mentioned above, from center cavity 11 exhaust out, can be diverted on an equal basis circumferential groove 15.Its result, can stablize the posture of outlet valve 20, also can reduce exhaust resistance.But, from exhaust port 13 air displacement or gas velocity out, there is the occasion departing from, can adjust arrangement angles or the quantity of intercommunicating pore 12.

Next, the alternate design of coil spring 21 is described.In example 1, used cylinder coil spring, but from the viewpoint of the stable control of exhaust port 13, the drum type coil spring that the external diameter of cone type coil spring, drum winding spring, central part is larger is also passable.

The outside dimension of coil spring end is little more too many than the internal diameter of center cavity 11 or valve guide portion 11a, comprises that the circular limiting board 22 of C shape just can not be used.As its countermeasure, between limiting board 22 and coil spring end, need to append thin plectane.In addition, the Center projection at this plectane, can prevent the displacement of coil spring central shaft.

Next, use from end turn or the less side of Coil spacing and compress, during nonlinear spring that spring constant can increase, the efficiengy-increasing that air displacement changes large compressor and carries the speed changing type compressor of variable-frequency motor produces effect very much.Fig. 6 represent line style coil spring 1. with the concept comparison 2. of non-linearity coil spring.S is that the stroke of outlet valve 20 is long, it is long that S1 and S2 are respectively coil spring range 1. and 2., and F is that to act on spring force (loading), F1 and F2 on outlet valve 20 be the stroke length of the outlet valve 20 initial stage load to each coil spring effect when being zero.

Non-linearity coil spring 2., the stroke quantitative change of outlet valve 20 is large, when coil spring starts to compress, together with the stroke of spring constant and outlet valve 20 is long, increases.That is,, with long being in proportion of stroke, spring constant can increase, so can increase the load of outlet valve 20.Therefore, even if stroke is long, increase, the posture of outlet valve 20 also can be stablized.

The simple shape of the utility model outlet valve 20, so can be used by overlapping several pieces valve blocks.In this design, if throttle slice thickness attenuate can improve the compression performance of valve seat 52, so Leakage Gas can reduce, can improve compressor efficiency.In addition, the thickness that drops on the outlet valve itself on valve seat 14 can attenuate, further improves sealability.In addition, in the utility model, because the shape of outlet valve 20 is small-sized and simple, so, as in the past, be not easy because the breakage that fatigue ruption brings valve block.

So in addition, piston 45 normally the switching area of eccentric operating exhaust port 13 because the slip of the upper Transverse plane of piston 45 changes.The gas flow of therefore, discharging from exhaust port 13 can produce towards the peripheral direction (or peripheral direction of compression chamber 41) of main bearing flange 50b the trend of skew.Fig. 7 considers the skew of this gas flow, with respect to center cavity 11 center, makes circumferential groove 15 center eccentric towards the external diameter direction of main bearing flange 50b.

Its result, due to the bias of circumferential groove 15, intercommunicating pore 12 and the gap of circumferential groove 15 between interior week can expand.Consistent from the side that this large gap is more with exhaust port 13 exhaust airstream out, air resistance just can reduce.In addition, due to the bias of circumferential groove 15, the bite of the root of long bearing 50a can reduce.

Fig. 8 represents that circumferential groove 15 is not annulus, can be also C shape groove.In this design, the width of valve guide portion 11b is larger than the valve guide portion 11a of Fig. 2, its quantity is 3.In addition, the quantity of intercommunicating pore 12 is also 3.Like this, the shape of circumferential groove 15 can be carried out many variations.Such as being ellipse or rectangular.

Embodiment 2:

In embodiment 2, in the outer radius of pipe portion 19, limiting board 23 and coil spring 21 have been configured.Fig. 9 be the longitudinal section of venting gas appliance 10, planimetric map that Figure 10 is venting gas appliance 10, Figure 11 from the order of below, in outlet valve 23, coil spring 25, limiting board 22a, left side is that planimetric map, right side are profile.

In Fig. 9 and Figure 10, in the restraining groove 17a that the periphery of pipe portion 19 possesses, embedded the internal diameter of limiting board 22a.As shown in figure 11, outlet valve 23 by: 4 projection 23b than the slightly little circular 23a of the internal diameter of center cavity 11 and and intercommunicating pore 12 gapped embeddings larger than the external diameter of pipe portion 19 form.Therefore, outlet valve 23 compares with embodiment 1 outlet valve 20, by appending projection 23b profile, can become large.And, between the periphery of pipe portion 19,4 projection 23b at limiting board 22a and outlet valve 23, thering is columnar coil spring 25, the direction by outlet valve 23 along exhaust port 13 compresses.

Its result, the action of the substantially horizontal of outlet valve 23 is by the interior week restriction of pipe portion 19, and the action of above-below direction is limited the coil spring 25 of 4 projection 23b pressurizations.The pressure of the pressure ratio exhaust silencer 51 of compression chamber 41 is high, and outlet valve 23 is moving up and down in the same manner as in Example 1, switch pair pore 13.In addition, Exhaust Gas flows out in circumferential groove 15 by 4 intercommunicating pores 12.Along with the knee-action of outlet valve 23, columnar coil spring 25 is flexible along the periphery of pipe portion 19.

In embodiment 2, coil spring 25 compresses 4 large projection 23b of external diameter, so be characterized in the embodiment 1 with respect to layout line coil spring 21 in center cavity 11, stablizing of the substantially horizontal of outlet valve 23 is controlled relatively good.Such as, valve block path increment large outlet valve more applicable.In addition, projection 23b can be relative 2, but the horizontal stability of 3 of isogonism configuration or 4 s' words outlet valve 23 is more superior.

Adopt rotary compressor of the present utility model can use in air conditioner, refrigeration plant, water heater etc., in addition, the utility model also can be applied in casing of low back pressure formula rotary compressor.Venting gas appliance of the present utility model is easily manufactured in addition, and the value aspect industry is larger.

In sum, according to the utility model embodiment's rotary compressor tool, have the following advantages:

1) feature of venting gas appliance of the present utility model is by integrated all exhaust components (outlet valve, spring, elastic component) in the center cavity compact and periphery chamber, can make the area of the valve seat part of thinner wall section reduce.Therefore, compare with tongue type valve in the past, the rigidity of bearing can be improved, so can improve the amount of deformation to compression chamber inside by venting gas appliance.Due to the improvement of this distortion, the piston clearance of eccentric operating can minimize, and improves compressor efficiency.In addition, by adopting the little circular valve of area, even under the high rotating speed of compressor, responsiveness is also superior, can reduce overcompression and the leakage loss of exhaust.

(2) coil spring configuring between limiting board and outlet valve, when controlling the posture of outlet valve, can prevent that outlet valve from directly contacting with limiting board, so can reduce noise.

(3) venting gas appliance of the present utility model can adopt in the main bearing of rotary compressor and supplementary bearing, or in twin-tub machine, also can adopt equally.

(4) component processing and assembling can be carried out from a direction, so can enhance productivity by automation.And, by sintered alloy method or forging method, can reach the effect of omitting a lot of component processing.

In the utility model, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, First Characteristic Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic or oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " can be First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.

In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And, the specific features of description, structure, material or feature can one or more embodiments in office or example in suitable mode combination.In addition,, not conflicting in the situation that, those skilled in the art can carry out combination and combination by the feature of the different embodiments that describe in this specification or example and different embodiment or example.

Although illustrated and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment in scope of the present utility model, modification, replacement and modification.

Claims (10)

1. a rotary compressor, is characterized in that, comprising:

Cylinder assembly, described cylinder assembly comprises the cylinder with compression chamber;

Two bearings, described two bearings are located at respectively upper surface and the lower surface of described cylinder assembly, described at least one, bearing is provided with the exhaust passage being communicated with described compression chamber, described exhaust passage comprises center cavity and a circumferential groove, described center cavity runs through corresponding described bearing on above-below direction, one end towards described cylinder of described center cavity limits exhaust port, described circumferential groove is recessed along the direction towards described cylinder from the end face away from described cylinder of described bearing, described circumferential groove is around at least a portion setting of described center cavity, the part between described center cavity and described circumferential groove of described bearing limits pipe portion, described pipe portion is provided with a plurality of intercommunicating pores to be communicated with described center cavity and described circumferential groove,

Venting gas appliance, described venting gas appliance comprises outlet valve and limiting board, described outlet valve is located at described exhaust port and sentences and open or close described exhaust port, described limiting board be located in described pipe portion and the side away from described exhaust port that is positioned at described outlet valve to limit the moving displacement of described outlet valve.

2. rotary compressor according to claim 1, is characterized in that, described circumferential groove is circular groove.

3. rotary compressor according to claim 1, is characterized in that, described circumferential groove forms C shape.

4. rotary compressor according to claim 1, it is characterized in that, described limiting board is enclosed within outward on the periphery wall of described pipe portion, described outlet valve comprises body and a plurality of projection, described a plurality of projection stretches out and evenly spaced apart from the periphery wall of described body respectively, and described body is positioned at described center cavity and described a plurality of projection extend into described circumferential groove from described a plurality of intercommunicating pores respectively.

5. rotary compressor according to claim 1, is characterized in that, also comprises elastic component, and the two ends of described elastic component are only against respectively on described limiting board and described outlet valve.

6. rotary compressor according to claim 5, is characterized in that, described elastic component is line style coil spring or non-linearity coil spring.

7. rotary compressor according to claim 1, is characterized in that, the inner circle wall of described pipe portion is provided with the restraining groove that holds described limiting board.

8. rotary compressor according to claim 1, is characterized in that, described outlet valve is a plurality of and superposes on above-below direction.

9. rotary compressor according to claim 1, is characterized in that, at cylinder in the radial direction, and the outside at the center that is centered close to described center cavity of described circumferential groove.

10. a freezing cycle device, is characterized in that, comprises according to the rotary compressor described in any one in claim 1-9.