CN203476707U - Low-backpressure rotating compressor - Google Patents
Low-backpressure rotating compressor Download PDFInfo
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- CN203476707U CN203476707U CN201320524772.6U CN201320524772U CN203476707U CN 203476707 U CN203476707 U CN 203476707U CN 201320524772 U CN201320524772 U CN 201320524772U CN 203476707 U CN203476707 U CN 203476707U
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Abstract
The utility model discloses a low-backpressure rotating compressor, which comprises a shell, a motor, a compression device and an air suction pipe, wherein the motor is arranged in the shell; the compression device is arranged in the shell, is positioned below the motor, and comprises a main bearing and an air suction separation structure arranged on the main bearing in a penetration way; an air suction separation cavity is defined between the air suction separation structure and the main bearing; an air suction port is formed in the main bearing; one end of the air suction pipe extends into the shell, and is communicated with the air suction separation cavity. According to the low-backpressure rotating compressor, the air suction separation structure is arranged on the main bearing, and can be used for separating a balancing weight of a rotor and the air suction port in the main bearing on the two sides to prevent a coolant from being incompletely sucked into the air suction port of the main bearing, so that the cooling capacity of the low-backpressure rotating compressor is improved, and the volumetric efficiency of the low-backpressure rotating compressor is further improved.
Description
Technical field
The utility model relates to art of refrigeration units, especially relates to a kind of low back pressure rotary compressor.
Background technique
Traditional low back pressure rotary compressor is generally provided with sucking pipe in upper end or the side of housing, the refrigeration agent of low-temp low-pressure enters enclosure interior from the suction port of upper shell or housing side, when the refrigeration agent of suction casing sucks from main bearing intakeport through motor, enter cylinder boil down to high temperature and high pressure gas, through supplementary bearing exhaust port, discharge, enter refrigeration system.In this process, because driving lower equilibrium block, rotor rotates, rotating speed is very fast, equilibrium block air-flow is around produced to disturbance, when refrigeration agent sucks as gas, because main bearing intakeport is positioned at equilibrium block below under rotor, can be subject to rotor and rotate the flow perturbation impact causing, cause refrigeration agent to suck not exclusively from main bearing suction port, thereby can reduce compressor refrigerating capacity, and then can have influence on the volumetric efficiency of compressor.
The gas of getting back to compressor from refrigeration system enters into after enclosure interior by sucking pipe, carry out heat exchange with the motor of high temperature, be on the one hand because the cooling needs of motor, guaranteed that motor can be because of the overheated integrity problem that brings, but on the other hand, therefore the gas of suction be also heated, cause inspiratory volume to increase, air-breathing quality reduces, thereby causes the performance of low back pressure compressor to be greatly affected, and brings the problem that performance is low.In addition, if sucking pipe is arranged on upper shell, under cryogenic conditions, under-20 ℃ of evaporating temperature conditions that need to guarantee as air condition compressor, the gas temperature of getting back to compressor from refrigeration system generally can be at-10 ℃ even lower, like this, under this condition, turn round for a long time, can make upper shell frosting, and because the tenminal block of electric component is arranged on upper shell, frosting meeting brings the great risk of short circuit between terminal.
In addition, parts of lubricating oil flows out from the outlet of main bearing internal helicoid oil groove upper end, from main bearing wheel hub, down flow out to main bearing, lubricant oil on main bearing, owing to sucking the drive of gas, will enter in the lump main bearing intakeport along sucking gas, the refrigerant of returning from refrigeration system in addition can take back parts of lubricating oil, also can enter in the lump main bearing intakeport along sucking gas, if the lubricant oil that cylinder compression chamber inner accumulated is too much, volumetric efficiency will be had a strong impact on, but also the raising into power can be brought.
Model utility content
The utility model is intended at least solve one of technical problem existing in prior art.For this reason, an object of the present utility model is to propose a kind of rotor that solves and rotates the flow perturbation low back pressure rotary compressor that suction affects on refrigeration agent producing.
According to low back pressure rotary compressor of the present utility model, comprising: housing; Motor, described motor is located in described housing; Compression set, described compression set is located in described housing and is positioned at the below of described motor, described compression set comprises main bearing and is located in the air-breathing separation structure on described main bearing, between described air-breathing separation structure and described main bearing, limit air-breathing disengagement chamber, on described main bearing, there is intakeport; Sucking pipe, one end of described sucking pipe is stretched in described housing and is communicated with described air-breathing disengagement chamber.
According to low back pressure rotary compressor of the present utility model, by air-breathing separation structure is set on main bearing, air-breathing separation structure separates the intakeport on the equilibrium block of rotor and main bearing in both sides, avoided refrigerant to suck not exclusively from the intakeport of main bearing, thereby improved the refrigerating capacity of low back pressure rotary compressor, and then improved the volumetric efficiency of low back pressure rotary compressor.
Alternatively, described air-breathing separation structure is air-breathing separation hood, on described air-breathing separation hood, is formed with connection mouth, and described sucking pipe communicates with described air-breathing disengagement chamber by described connection mouth.
Further, described sucking pipe is circular pipe, and the diameter of described sucking pipe is greater than the height of described air-breathing separation hood.Thus, the refrigerant passing into from sucking pipe is divided into two-part, a part enters air-breathing disengagement chamber by connection mouth, another part enters in the holding space of housing, for housing provides back pressure, and motor is carried out cooling, motor can be because of not overheated and cause the reliability decrease of motor like this, and effectively reduced refrigerant and be disabled heating, thereby improved the volumetric efficiency of low back pressure rotary compressor.
Further, the position of the described intakeport of vicinity of described air-breathing separation hood is formed with return-air hole.Thus, by return-air hole is set, return-air hole can be by the refrigerant in housing, be above-mentionedly for housing provides the refrigerant of back pressure and cooling motor, to be passed into the suction port of main bearing, thereby can effectively improve refrigerant in the flow circuit of low back pressure rotary compressor inside, and then improve the reliability of low back pressure rotary compressor.
Particularly, in the plane perpendicular to described sucking pipe, the upper-end surface of described air-breathing separation hood is divided into upper and lower two-part by the cross section of described sucking pipe, the upper part cross-section area of described sucking pipe is S1, the lower part cross-section area of described sucking pipe is S2, the area of described return-air hole is S3, wherein S2 > S1 > S3.
Or alternatively, described air-breathing disengagement chamber is stretched into through described connection mouth in one end of described sucking pipe, and the distance between the top of described sucking pipe and the roof of described air-breathing separation hood is d, wherein 0mm < d < 30mm.Thus, the holding space that top and the gap air-breathing separation hood roof between of fraction refrigerant by sucking pipe enters housing, thereby for housing provides back pressure, and carry out cooling to motor, motor can be because of not overheated and cause the reliability decrease of motor like this, and effectively reduced refrigerant and be disabled heating, thereby improved the volumetric efficiency of low back pressure rotary compressor.
Again or alternatively, on described air-breathing separation hood, be formed with at least one air outlet hole.Thus, by setting out pore, fraction refrigerant can enter in housing by air outlet hole, thereby for housing provides back pressure, and motor is carried out cooling, and and can effectively reduce refrigerant and be disabled heating, improve the volumetric efficiency of low back pressure rotary compressor.
Further, described low back pressure rotary compressor further comprises: filter screen, and described filter screen is located in described air-breathing disengagement chamber and between described sucking pipe and described intakeport to filter the lubricant oil the refrigerant passing into from described sucking pipe; And drainage trough, described drainage trough is corresponding with described filter screen, and described drainage trough passes to mutually the lubricant oil filtering out is derived by described drainage trough with described air-breathing disengagement chamber.
Alternatively, described air-breathing separation structure is cover plate, and the upper-end surface of described cover plate and described main bearing is spaced apart from each other to limit described air-breathing disengagement chamber.
Further, on described cover plate, be formed with at least one air outlet hole.
Further, described main bearing is provided with the supporting portion of extending straight up, on described supporting portion, is formed with return-air hole.
Alternatively, described air-breathing separation structure is steel and iron parts or working of plastics.
Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage accompanying drawing below combination obviously and is easily understood becoming embodiment's description, wherein:
Fig. 1 is according to the schematic diagram of an embodiment's of the utility model low back pressure rotary compressor;
Fig. 2 is the enlarged view of the A portion that shows of Fig. 1 centre circle;
Fig. 3 is the sectional drawing along B-B line in Fig. 2;
Fig. 4 a-Fig. 4 c is the schematic diagram of the air-breathing separation hood of the low back pressure rotary compressor shown in Fig. 1;
Fig. 5 is the schematic diagram of the return-air hole shown in Fig. 4 b;
Fig. 6 is the left view of the sucking pipe shown in Fig. 1;
Fig. 7 is according to the schematic diagram of another embodiment's of the utility model low back pressure rotary compressor;
Fig. 8 is according to the schematic diagram of another embodiment's of the utility model low back pressure rotary compressor;
Fig. 9 is according to the schematic diagram of another embodiment's of the utility model low back pressure rotary compressor.
Reference character:
100: low back pressure rotary compressor;
11: upper shell; 12: main casing; 13: lower shell body; 14: oil sump;
2: motor; 21: stator; 22: rotor;
31: cylinder; 311: compression chamber; 32: main bearing; 321: intakeport;
33: supplementary bearing; 34: piston; 35: bent axle;
36: air-breathing separation hood; 361: air-breathing disengagement chamber; 362: return-air hole;
363: drainage trough; 364: connection mouth;
365: roof; 366: sidewall; 3661: reentrant part;
367: flange; 3671: mounting hole; 368: air outlet hole;
37: cover plate; 371: air-breathing disengagement chamber; 372: return-air hole; 373: air outlet hole;
4: sucking pipe; 5: filter screen.
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, only 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, orientation or the position relationship of the indications such as term " " center ", " laterally ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward " be based on orientation shown in the drawings or position relationship; be only the utility model and simplified characterization for convenience of description; rather than the device of indication or hint indication or element must have specific orientation, with specific orientation structure and operation, so 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, except as otherwise noted, the implication of " a plurality of " is two or more.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete meaning of above-mentioned term in the utility model.
Below with reference to Fig. 1-Fig. 9, describe according to the utility model embodiment's low back pressure rotary compressor 100, low back pressure rotary compressor 100 can be for such as refrigerator or air-conditioning system etc. of chiller plant.
As shown in Figure 1, according to low back pressure rotary compressor 100 of the present utility model, comprise housing, motor 2, compression set and sucking pipe 4.
For example, in the example of Fig. 1, housing comprises upper shell 11, main casing 12 and lower shell body 13, main casing 12 is roughly cylindrical shape, the bottom-open of upper shell 11, the top of lower shell body 13 is opened wide, and upper shell 11 is located at the top of main casing 12, lower shell body 13 is located at the bottom of main casing 12, upper shell 11, main casing 12 and lower shell body 13 limit holding space jointly, and alternatively, upper shell 11, main casing 12 and lower shell body 13 are welded to connect and are integral.Certainly, the utility model is not limited to this, and in other examples of the present utility model, upper shell 11, main casing 12 and lower shell body 13 can also be one-body molded.
Motor 2 is located in housing.With reference to Fig. 1, motor 2 is located in holding space, and is positioned at the top of holding space, and motor 2 comprises stator 21 and rotor 22, and the periphery of stator 21 can be fixedly connected on the inwall of housing, and rotor 22 is located in stator 21 rotationally.Further, the bottom of rotor 22 is provided with equilibrium block.
Compression set is located in housing, and compression set is positioned at the below of motor 2.As shown in Figure 1, compression set is located at the bottom of holding space, and is positioned at the below of motor 2, and compression set can be fixedly connected on the inwall of housing, and the bottom of housing has oil sump 14, in oil sump 14, encloses lubricant oil.
Particularly, with reference to Fig. 1, compression set comprises cylinder 31, main bearing 32, supplementary bearing 33, piston 34, slide plate (scheming not shown) and bent axle 35, wherein, cylinder 31 can form all unlimited cylindrical shapes of top and bottom, on cylinder 31, be formed with the vane slot radially extending along it, main bearing 32 and supplementary bearing 33 are located at respectively top and the bottom of cylinder 31, main bearing 32, cylinder 31 and supplementary bearing 33 limit compression chamber 311 jointly, piston 34 is located in compression chamber 311 prejudicially, the upper end of bent axle 35 is connected with motor 2, the lower end of bent axle 35 is stretched in compression chamber 311 to drive piston 34 to roll along the inwall of compression chamber 311 through main bearing 32, slide plate is located in vane slot movably, for example slide plate can be located in vane slot by spring movably, one end of slide plate is stretched in compression chamber 311 and is only supported piston 34.
Further, on main bearing 32, there is intakeport 321.As shown in Figure 1-Figure 3, intakeport 321 runs through main bearing 32 along the vertical direction, and intakeport 321 is communicated with compression chamber 311, and low-temp low-pressure refrigerant can enter compression chamber 311 by the intakeport 321 on main bearing 32.
Compression set comprises main bearing 32 and is located in the air-breathing separation structure on main bearing 32, limits air-breathing disengagement chamber 361 between air-breathing separation structure and main bearing 32.For example, in the example of Fig. 1, Fig. 7-Fig. 9, air-breathing separation structure is between the equilibrium block and intakeport 321 of rotor 22, thereby equilibrium block and intakeport 321 are separated, like this when rotor 22 band dynamic balance weights rotate, can effectively prevent that rotor 22 from rotating the impact that the flow perturbation that produces sucks refrigerant, air-breathing separation structure and main bearing 32 limit air-breathing disengagement chamber 361 jointly, and air-breathing disengagement chamber 361 is communicated with compression chamber 311 by intakeport 321.
One end of sucking pipe 4 is stretched in housing, and sucking pipe 4 communicates with air-breathing disengagement chamber 361.With reference to Fig. 1, the right-hand member of sucking pipe 4 is through the sidewall 366 of housing, and stretch in holding space, sucking pipe 4 is connected with air-breathing disengagement chamber 361, the low-temp low-pressure refrigerant passing into from sucking pipe 4 like this can enter air-breathing disengagement chamber 361, and by intakeport 321, enter compression chamber 311 and compress, in this process, low-temp low-pressure refrigerant can not be subject to the impact that rotor 22 rotates the flow perturbation causing.
According to low back pressure rotary compressor 100 of the present utility model, by air-breathing separation structure is set on main bearing 32, air-breathing separation structure separates the intakeport on the equilibrium block of rotor 22 and main bearing 32 321 in both sides, avoided refrigerant to suck not exclusively from the intakeport 321 of main bearing 32, thereby improved the refrigerating capacity of low back pressure rotary compressor 100, and then improved the volumetric efficiency of low back pressure rotary compressor 100.
In an embodiment of the present utility model, air-breathing separation structure is air-breathing separation hood 36, on air-breathing separation hood 36, is formed with connection mouth 364, and sucking pipe 4 communicates with air-breathing disengagement chamber 361 by connection mouth 364.As shown in Figure 1 and Figure 4, the bottom-open of air-breathing separation hood 36, particularly, air-breathing separation hood 36 comprises roof 365 and sidewall 366, and sidewall 366 arranges around roof 365, the upper end of sidewall 366 is connected with the periphery edge of roof 365, further, the lower end of sidewall 366 is provided with the flange 367 horizontally outward extending, and connection mouth 364 is formed on the sidewall 366 of air-breathing separation hood 36, sucking pipe 4 coordinates with connection mouth 364, thereby low-temp low-pressure refrigerant is passed into air-breathing disengagement chamber 361 by connection mouth 364.Alternatively, the central axes of the central axis of air-breathing separation hood 36 and main bearing 32.
Further, with reference to Fig. 4, on the sidewall 366 of air-breathing separation hood 36, be formed with the reentrant part 3661 inwardly concaving, on flange 367, the position of corresponding reentrant part 3661 is formed with the mounting hole 3671 running through, screw or bolt can pass mounting hole 3671, the main bearing 32 of air-breathing separation hood 36, thereby air-breathing separation hood 36 is connected on main bearing 32 securely.Here, it should be noted that, direction " interior " can be understood as the direction towards air-breathing separation hood 36 centers, and its opposite direction is defined as " outward ", away from the direction at air-breathing separation hood 36 centers.
Alternatively, reentrant part 3661 is a plurality of, and a plurality of reentrant part 3661 each intervals turn up the soil be distributed in air-breathing separation hood 36 week upwards.Four reentrant part 3661 have for example been shown in the example of Fig. 4.It will be appreciated that, the distance that the quantity of reentrant part 3661 and adjacent reentrant part 3661 are spaced apart from each other can require to arrange according to practical set, more air-breathing separation hood 36 is connected on main bearing 32.
Further, sucking pipe 4 is circular pipe, and the diameter of sucking pipe 4 is greater than the height of air-breathing separation hood 36.As Fig. 1, shown in Fig. 2 and Fig. 4 a, the shape of cross section of sucking pipe 4 is circular, the connection mouth 364 of air-breathing separation hood 36 be shaped as circle, and the internal diameter of sucking pipe 4 is greater than the diameter of connection mouth 364, after sucking pipe 4 and air-breathing separation hood 36 are seated, the upper-end surface of the top of the inwall of sucking pipe 4 and air-breathing separation hood 36 is spaced from each other on above-below direction, and the top of the inwall of sucking pipe 4 is positioned at the top of the upper-end surface of air-breathing separation hood 36, the refrigerant passing into from sucking pipe 4 is like this divided into two-part, a part enters air-breathing disengagement chamber 361 by connection mouth 364, another part enters in the holding space of housing, for housing provides back pressure, and carry out cooling to motor 2, motor 2 can be because of not overheated and cause the reliability decrease of motor 2 like this, and effectively reduced refrigerant and be disabled heating, thereby improved the volumetric efficiency of low back pressure rotary compressor 100.
Further, the position of the contiguous intakeport 321 of air-breathing separation hood 36 is formed with return-air hole 362.With reference to Fig. 3 and Fig. 4 b, return-air hole 362 runs through the sidewall 366 of air-breathing separation hood 36, like this can be by the refrigerant in housing by return-air hole 362, be above-mentionedly for housing provides the refrigerant of back pressure and cooling motor 2, to be passed into the suction port of main bearing 32, thereby can effectively improve refrigerant in the flow circuit of low back pressure rotary compressor 100 inside, and then improve the reliability of low back pressure rotary compressor 100.Alternatively, return-air hole 362 is circular port, slotted eye, long-round-shape hole or polygonal hole etc.
Alternatively, in the plane perpendicular to sucking pipe 4, the upper-end surface of air-breathing separation hood 36 is divided into upper and lower two-part by the cross section of sucking pipe 4, the upper part cross-section area of sucking pipe 4 is S1, the lower part cross-section area of sucking pipe 4 is S2, the area of return-air hole 362 is S3, wherein S2 > S1 > S3.
As shown in Figure 5 and Figure 6, the roof 365 of air-breathing separation hood 36 is divided into upper and lower two-part by sucking pipe 4, the area surrounding between the upper surface of the roof 365 of the inwall of sucking pipe 4 and air-breathing separation hood 36 is S1, the area surrounding between the lower surface of the roof 365 of the inwall of sucking pipe 4 and air-breathing separation hood 36 is S2, the area of return-air hole 362 is S3, wherein, S2 > S1 > S3, the low-temp low-pressure refrigerant of returning from refrigeration system like this enters sucking pipe 4, most of refrigerant flows from lower half portion of sucking pipe 4, enter the intakeport 321 of main bearing 32, fraction refrigerant enters in the holding space of housing by upper half part of sucking pipe 4, thereby further reduce refrigerant and be disabled heating.
In another embodiment of the present utility model, air-breathing disengagement chamber 361 is stretched into through connection mouth 364 in one end of sucking pipe 4 (example is right-hand member as shown in Figure 7), distance between the roof 365 of the top of sucking pipe 4 and air-breathing separation hood 36 is d, wherein 0mm < d < 30mm.
For example, in the example of Fig. 7, sucking pipe 4 is circular pipe, connection mouth 364 be shaped as circle, the external diameter of sucking pipe 4 is less than the diameter of connection mouth 364, after sucking pipe 4 and air-breathing separation hood 36 are seated, the roof 365 of the top of sucking pipe 4 and air-breathing separation hood 36 is spaced from each other on above-below direction, and now the distance d of the roof 365 of the top of sucking pipe 4 and air-breathing separation hood 36 on above-below direction should meet: 0mm < d < 30mm.It will be appreciated that, the concrete numerical value of the distance d of the roof 365 of the top of sucking pipe 4 and air-breathing separation hood 36 on above-below direction can be according to actual requirement setting, to meet better actual requirement.
First the low-temp low-pressure refrigerant passing into from sucking pipe 4 like this can all enter air-breathing disengagement chamber 361, then wherein most refrigerant flow to the suction port of main bearing 32, and enter compression chamber 311 from suction port, the holding space that top and the gap air-breathing separation hood 36 roofs 365 between of fraction refrigerant by sucking pipe 4 enters housing, thereby for housing provides back pressure, and carry out cooling to motor 2, motor 2 can be because of not overheated and cause the reliability decrease of motor 2 like this, and effectively reduced refrigerant and be disabled heating, thereby improved the volumetric efficiency of low back pressure rotary compressor 100.
Further, as shown in Figure 7, on air-breathing separation hood 36, be formed with return-air hole 362, can be by the refrigerant in holding space by return-air hole 362, be above-mentionedly for housing provides the refrigerant of back pressure and cooling motor 2, to be passed into the intakeport 321 of main bearing 32, thereby can effectively improve refrigerant in the flow circuit of low back pressure rotary compressor 100 inside, and then improve the reliability of low back pressure rotary compressor 100.
In another embodiment of the present utility model, on air-breathing separation hood 36, be formed with at least one air outlet hole 368.For example, in the example of Fig. 8, air outlet hole 368 runs through the roof 365 of air-breathing separation hood 36, the low-temp low-pressure refrigerant major part passing into from sucking pipe 4 is in air-breathing disengagement chamber 361 internal flows, then the intakeport 321 by main bearing 32 enters in compression chamber 311, fraction enters in housing by air outlet hole 368, thereby for housing provides back pressure, and carry out cooling to motor 2, and can effectively reduce refrigerant and be disabled heating, improve the volumetric efficiency of low back pressure rotary compressor 100.Certainly, this use is novel is not limited to this, and in other examples of the present utility model, air outlet hole 368 also can be formed on the sidewall 366 of air-breathing separation hood 36 (scheming not shown).It will be appreciated that, the quantity of air outlet hole 368, size and shape can be according to actual requirement settings, to meet better actual requirement.
Further, low back pressure rotary compressor 100 further comprises: filter screen 5 and drainage trough 363, filter screen 5 is located in air-breathing disengagement chamber 361, and filter screen 5 between sucking pipe 4 and intakeport 321 to filter the lubricant oil the refrigerant pass into from sucking pipe 4.With reference to Fig. 3, filter screen 5 is positioned at air-breathing disengagement chamber 361, and filter screen 5 be located at refrigerant from sucking pipe 4 towards the mobile flow direction of intakeport 321, particularly, filter screen 5 is positioned at the downstream of sucking pipe 4, and is positioned at the upstream of intakeport 321, like this, when the refrigerant passing into from sucking pipe 4 passes through filter screen 5, through the filtration of filter screen 5, thereby by the lubrication oil filtration in refrigerant out.Alternatively, filter screen 5 forms the shape with the inner wall shape adaptation of air-breathing separation hood 36.
In another embodiment of the present utility model, air-breathing separation structure is cover plate 37, and cover plate 37 is spaced apart from each other to limit air-breathing disengagement chamber 371 with the upper-end surface of main bearing 32.With reference to Fig. 9, cover plate 37 along continuous straight runs extend, and the upper-end surface of the lower surface of cover plate 37 and main bearing 32 is spaced from each other on above-below direction, jointly to limit air-breathing disengagement chamber 371.
Further, on cover plate 37, be formed with at least one air outlet hole 373.For example, in the example of Fig. 9, air outlet hole 373 runs through the roof 365 of air-breathing separation hood 36, the low-temp low-pressure refrigerant major part passing into from sucking pipe 4 is in air-breathing disengagement chamber 371 internal flows, then the intakeport 321 by main bearing 32 enters in compression chamber 311, fraction enters in housing by air outlet hole 373, thereby for housing provides back pressure, and carry out cooling to motor 2, and can effectively reduce refrigerant and be disabled heating, improve the volumetric efficiency of low back pressure rotary compressor 100.Certainly, this use is novel is not limited to this, and in other examples of the present utility model, air outlet hole 373 also can be formed on the sidewall 366 of air-breathing separation hood 36 (scheming not shown).It will be appreciated that, the quantity of air outlet hole 373, size and shape can be according to actual requirement settings, to meet better actual requirement.
Further, main bearing 32 is provided with the supporting portion of extending straight up, is formed with return-air hole 372 on supporting portion.As shown in Figure 9, extend straight up from the edge of main bearing 32 supporting portion, supporting portion can be for supporting cover plate 37, thereby make the lower surface of cover plate 37 and the upper-end surface of main bearing 32 be spaced from each other jointly to limit air-breathing disengagement chamber 371, return-air hole 372 runs through supporting portion, can be by the refrigerant in holding space by return-air hole 372, be above-mentionedly for housing provides the refrigerant of back pressure and cooling motor 2, to be passed into the intakeport 321 of main bearing 32, thereby can effectively improve refrigerant in the flow circuit of low back pressure rotary compressor 100 inside, and then improved the reliability of low back pressure rotary compressor 100.
Alternatively, air-breathing separation structure is steel and iron parts or working of plastics etc.That is to say, air-breathing separation structure can adopt ferrous materials to make, or adopts plastic materials to make.Certainly, air-breathing separation structure can also adopt other to be easy to processing and the good material of heat-shielding performance is made.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " 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, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiments or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present utility model and aim, can carry out multiple variation, modification, replacement and modification to these embodiments, scope of the present utility model is limited by claim and equivalent thereof.
Claims (12)
1. a low back pressure rotary compressor, is characterized in that, comprising:
Housing;
Motor, described motor is located in described housing;
Compression set, described compression set is located in described housing and is positioned at the below of described motor, described compression set comprises main bearing and is located in the air-breathing separation structure on described main bearing, between described air-breathing separation structure and described main bearing, limit air-breathing disengagement chamber, on described main bearing, there is intakeport;
Sucking pipe, one end of described sucking pipe is stretched in described housing and is communicated with described air-breathing disengagement chamber.
2. low back pressure rotary compressor according to claim 1, is characterized in that, described air-breathing separation structure is air-breathing separation hood, on described air-breathing separation hood, is formed with connection mouth, and described sucking pipe communicates with described air-breathing disengagement chamber by described connection mouth.
3. low back pressure rotary compressor according to claim 2, is characterized in that, described sucking pipe is circular pipe, and the diameter of described sucking pipe is greater than the height of described air-breathing separation hood.
4. low back pressure rotary compressor according to claim 3, is characterized in that, the position of the described intakeport of vicinity of described air-breathing separation hood is formed with return-air hole.
5. low back pressure rotary compressor according to claim 4, it is characterized in that, in the plane perpendicular to described sucking pipe, the upper-end surface of described air-breathing separation hood is divided into upper and lower two-part by the cross section of described sucking pipe, the upper part cross-section area of described sucking pipe is S1, the lower part cross-section area of described sucking pipe is S2, and the area of described return-air hole is S3, wherein S2 > S1 > S3.
6. low back pressure rotary compressor according to claim 2, it is characterized in that, described air-breathing disengagement chamber is stretched into through described connection mouth in one end of described sucking pipe, distance between the top of described sucking pipe and the roof of described air-breathing separation hood is d, wherein 0mm < d < 30mm.
7. low back pressure rotary compressor according to claim 2, is characterized in that, on described air-breathing separation hood, is formed with at least one air outlet hole.
8. according to the low back pressure rotary compressor described in any one in claim 1-7, it is characterized in that, further comprise:
Filter screen, described filter screen is located in described air-breathing disengagement chamber and between described sucking pipe and described intakeport to filter the lubricant oil the refrigerant passing into from described sucking pipe; With
Drainage trough, described drainage trough is corresponding with described filter screen, and described drainage trough passes to mutually the lubricant oil filtering out is derived by described drainage trough with described air-breathing disengagement chamber.
9. low back pressure rotary compressor according to claim 1, is characterized in that, described air-breathing separation structure is cover plate, and the upper-end surface of described cover plate and described main bearing is spaced apart from each other to limit described air-breathing disengagement chamber.
10. low back pressure rotary compressor according to claim 9, is characterized in that, is formed with at least one air outlet hole on described cover plate.
11. low back pressure rotary compressors according to claim 10, is characterized in that, described main bearing is provided with the supporting portion of extending straight up, on described supporting portion, is formed with return-air hole.
12. low back pressure rotary compressors according to claim 1, is characterized in that, described air-breathing separation structure is steel and iron parts or working of plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320524772.6U CN203476707U (en) | 2013-08-26 | 2013-08-26 | Low-backpressure rotating compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320524772.6U CN203476707U (en) | 2013-08-26 | 2013-08-26 | Low-backpressure rotating compressor |
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| CN203476707U true CN203476707U (en) | 2014-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799120A (en) * | 2018-07-27 | 2018-11-13 | 珠海凌达压缩机有限公司 | Compressor and air conditioner with it |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799120A (en) * | 2018-07-27 | 2018-11-13 | 珠海凌达压缩机有限公司 | Compressor and air conditioner with it |
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Granted publication date: 20140312 |