CN203822633U - Rotary compressor assembly with low-pressure cavity - Google Patents
Rotary compressor assembly with low-pressure cavity Download PDFInfo
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- CN203822633U CN203822633U CN201420198641.8U CN201420198641U CN203822633U CN 203822633 U CN203822633 U CN 203822633U CN 201420198641 U CN201420198641 U CN 201420198641U CN 203822633 U CN203822633 U CN 203822633U
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- pressure cavity
- pipeline
- flow line
- rotary compressor
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Abstract
The utility model discloses a rotary compressor assembly with a low-pressure cavity. The rotary compressor assembly with the low-pressure cavity comprises a compressor shell, a motor, a compression mechanism, a liquid accumulator, a gas inlet pipeline and a flow splitting device, wherein the motor is arranged at the upper part in the compressor shell; the compression mechanism is connected to the motor; the liquid accumulator is fixed outside the compressor shell; a gas outlet of the liquid accumulator is communicated with the inside of the compression mechanism; the gas inlet pipeline is connected with a heat exchanger of a refrigeration system; the flow splitting device comprises a first pipeline and a second pipeline; two ends of the first pipeline are respectively connected to the gas inlet pipeline and the liquid accumulator; two ends of the second pipeline are respectively connected to the gas inlet pipeline and the top of the compressor shell. By virtue of the rotary compressor assembly with the low-pressure cavity, one part of a low-temperature and low-pressure refrigerant entering via the gas inlet pipeline flows into the compressor shell through the flow splitting device; meanwhile, back pressure is provided for the inside of the compressor shell, thereby guaranteeing the reliability of the motor and improving the energy efficiency of the rotary compressor assembly with the low-pressure cavity.
Description
Technical field
The utility model relates to art of refrigeration units, especially relates to a kind of low-pressure cavity rotary compressor assembly.
Background technique
In correlation technique, point out, compared with high back pressure compressor, still there are some technical problems in low-pressure cavity rotary compressor, for example low-pressure cavity rotary compressor, in the time that air-conditioning system is in refrigerating operaton, the low-temperature low-pressure refrigerant of returning from vaporizer, be introduced in housing, motor is carried out after cooling entering compression chamber, this is a kind of invalid overheated to the cooling of motor, cause the rising of compressor air suction temperature and delivery temperature, inspiratory volume is increased, gettering quantity reduces, refrigerating capacity reduces, the rising of inhalation temperature also makes isentropic exponent increase, cause input power to improve, thereby significantly reduce the efficiency of compressor operating, increase power consumption.
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 low-pressure cavity rotary compressor assembly, and described low-pressure cavity rotary compressor assembly has improved the efficiency of low-pressure cavity rotary compressor in ensureing motor reliability.
According to low-pressure cavity rotary compressor assembly of the present utility model, comprising: compressor housing; Motor, described motor is located at the top in described compressor housing; Compressing mechanism, described compressing mechanism is located in described compressor housing and is connected with described motor; Liquid-storage container, it is external that described liquid-storage container is fixed on described compression case, and the air outlet of described liquid-storage container and the internal communication of described compressing mechanism; Air inlet pipeline, described air inlet pipeline is suitable for being connected with the heat exchanger of refrigeration system; And part flow arrangement, described part flow arrangement comprises the first pipeline and the second pipeline, the two ends of described the first pipeline are connected with described liquid-storage container with described air inlet pipeline respectively, and the two ends of described the second pipeline are connected with the top of described air inlet pipeline and described compressor housing respectively.
According to low-pressure cavity rotary compressor assembly of the present utility model, by part flow arrangement is set, a part the low-temp low-pressure refrigerant entering from air inlet pipeline flows into compressing mechanism inside, another part flows into compressor to carry out cooling to motor, and for compressor provides back pressure, the operational efficiency that has greatly improved low-pressure cavity rotary compressor, has reduced energy consumption, thereby when having ensured motor reliability, has improved the efficiency of low-pressure cavity rotary compressor.
Alternatively, the suction tude that described the first pipeline is described liquid-storage container.
Further, described low-pressure cavity rotary compressor assembly further comprises: return flow line, described return flow line is formed on described compressing mechanism with by described compressor and described compressing mechanism internal communication.
Particularly, described return flow line comprises: the first return flow line, and described the first return flow line is formed on the main bearing of described compressing mechanism; With the second return flow line, described the second return flow line is formed on the cylinder of described compressing mechanism, and described the second return flow line is communicated with jointly form described return flow line with described the first return flow line with described the first return flow line.
Alternatively, the two ends of described the second return flow line are communicated with the part stretching in described compressor housing of the inside of described the first return flow line and described compressing mechanism or the steam outlet pipe of described liquid-storage container respectively.
Alternatively, angle between the plane at the central axis place of the cylinder vane slot tool withdrawal groove central axis of the plane at the central axis place of the central axis of described the first return flow line and the bent axle of described compressing mechanism and described compressing mechanism and the bent axle of described compressing mechanism is β, and wherein said β is configured to: 38 ° of 2 ° of < β <.Further, described low-pressure cavity rotary compressor assembly further comprises: keep off oily part, described gear oil part is located on described main bearing and around described the first return flow line.
Alternatively, the first-class circulation passage of the common formation of steam outlet pipe of described the first pipeline, described liquid-storage container and described liquid-storage container, gap, the described return flow line of described the second pipeline, the stator of described motor and the gap of described housing, the stator of described motor and the rotor of described motor form second circulation passage jointly, and the long-pending ratio α amassing with the minimum through flow cross section of described first-class circulation passage of minimum through flow cross section of wherein said second circulation passage is configured to: 0.1≤α≤0.6.
Further, described α is configured to: 0.15≤α≤0.55.
Further, described α is configured to: 0.2≤α≤0.5.
Alternatively, the long-pending S1 of the minimum through flow cross section of the long-pending S2 of the minimum through flow cross section of described second circulation passage and described first-class circulation passage meets: 3.14mm
2≤ S2≤S1.
Alternatively, described the second pipeline is one or more.
Alternatively, described compressing mechanism is single cylinder or multi-cylinder structure.
Alternatively, described air inlet pipeline, described the first pipeline and described the second pipeline are connected by three-way pipe.
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.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present utility model and advantage accompanying drawing below combination is understood becoming embodiment's description obviously and easily, wherein:
Fig. 1 is according to the schematic diagram of the utility model embodiment's low-pressure cavity rotary compressor assembly;
Fig. 2 is the enlarged view of the A portion that shows of Fig. 1 centre circle;
Fig. 3 is another schematic diagram of the return flow line of the low-pressure cavity rotary compressor assembly shown in Fig. 1;
Fig. 4 is the schematic diagram of the flow of refrigerant of the low-pressure cavity rotary compressor assembly shown in Fig. 1;
Fig. 5 is according to the schematic diagram of another embodiment's of the utility model low-pressure cavity rotary compressor assembly, wherein shows two cylinders;
Fig. 6 is the enlarged view of the B portion that shows of Fig. 5 centre circle;
Fig. 7 is another schematic diagram of the return flow line of the low-pressure cavity rotary compressor assembly shown in Fig. 5;
Fig. 8 is according to the schematic diagram of another embodiment's of the utility model low-pressure cavity rotary compressor assembly.
Reference character:
100: low-pressure cavity rotary compressor assembly;
11: upper shell; 12: main casing; 13: lower shell body; 14: outlet pipe;
21: stator; 22: rotor;
31: main bearing; 311: the first return flow lines; 32: cylinder; 321: the second return flow lines;
33: supplementary bearing; 34: piston; 35: bent axle; 36: cover plate; 37: keep off oily part;
38: dividing plate; 39: return flow line;
4: liquid-storage container; 41: steam outlet pipe; 5: air inlet pipeline;
61: the first pipelines; 62: the second pipelines; 63: three-way pipe.
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.Be exemplary below by the embodiment who is described with reference to the drawings, 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, term " " center ", " laterally ", " length ", " width ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " axially ", " radially ", orientation or the position relationship of instructions 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, instead of device or the element of instruction 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 instruction 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 " multiple " 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.
Describe according to the utility model embodiment's low-pressure cavity rotary compressor assembly 100 below with reference to Fig. 1-Fig. 8, wherein, " low-pressure cavity " refers in compressor housing is low-pressure, the low-pressure cavity structure rotary compressor being communicated with pressure of inspiration(Pi) in compressor housing.It is that the interior rotary compressor for high pressure of compressor housing is in some fields that the compressor of this structure is compared high back pressure compressor, especially in following rotary compressor field, there is special advantage, this be motor due to low-pressure cavity rotary compressor in the air-breathing environment of low-temp low-pressure, there will not be high back pressure compressor to cause like that the too high or cooling deficiency of motor of motor temperature because delivery temperature is high.In addition, under environment under low pressure, the content of compressor inner refrigerant will significantly reduce, and the refrigerant charge of refrigeration system can significantly be reduced.
As shown in Figure 1, according to the utility model embodiment's low-pressure cavity rotary compressor assembly 100, comprise compressor housing, motor, compressing mechanism, liquid-storage container 4, air inlet pipeline 5 and part flow arrangement.
Motor is located at the top in compressor housing.Compressing mechanism is located in compressor housing and is connected with motor.For example, in the example of Fig. 1, compressor housing is arranged along vertical, now the central axis of compressor housing vertically extends, particularly, compressor housing comprises upper shell 11, main casing 12 and lower shell body 13, main casing 12 is formed as the drum that top and bottom are all opened wide substantially, the bottom-open of upper shell 11, the top of lower shell body 13 is opened wide, wherein 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, alternatively, upper shell 11, main casing 12 and lower shell body 13 are welded to connect integral, motor and compressing mechanism are installed in holding space, and motor and compressing mechanism are arranged up and down.Certainly, the utility model is not limited to this, and upper shell 11, main casing 12 and lower shell body 13 can also one-body molded (scheming not shown).
With reference to Fig. 1, motor is located at the top in holding space, and wherein, motor 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.Compressing mechanism is located at the bottom in holding space and is positioned at the below of motor, and compressing mechanism can be fixedly connected on the inwall of compressor housing, and the bottom of housing has oil sump, encloses lubricant oil in oil sump.
Particularly, as shown in Figure 1, compressing mechanism comprises cylinder 32, main bearing 31, supplementary bearing 33, piston 34, slide plate (scheming not shown) and bent axle 35, wherein, cylinder 32 can be formed as the cylindrical shape that top and bottom are all opened wide, on cylinder 32, be formed with the vane slot radially extending along it, main bearing 31 and supplementary bearing 33 are located at respectively top and the bottom of cylinder 32, main bearing 31, cylinder 32 and supplementary bearing 33 limit compression chamber jointly, piston 34 is located in compression chamber prejudicially, the upper end of bent axle 35 is connected with motor, the lower end of bent axle 35 is stretched in compression chamber to drive piston 34 to roll along the inwall of compression chamber through main bearing 31, slide plate is located in vane slot movably, for example slide plate can be located in vane slot movably by spring, one end of slide plate is stretched in compression chamber and is only supported piston 34.
It is external that liquid-storage container 4 is fixed on compression case, and the air outlet of liquid-storage container 4 and the internal communication of compressing mechanism.For example, in the example of Fig. 1, liquid-storage container 4 is arranged along vertical, and liquid-storage container 4 is arranged on the external side of compression case, in liquid-storage container 4, be provided with filter screen, prevent that impurity from entering the possibility of compressor, air outlet is formed on the bottom of liquid-storage container 4, and the steam outlet pipe 41 of liquid-storage container 4 is located in air outlet place, and the lower end of steam outlet pipe 41 is stretched in compression chamber and compressed with the low-temp low-pressure refrigerant to flowing into from air inlet pipeline 5 through air outlet.
Further; on steam outlet pipe 41, be formed with return port; thereby the lubricant oil that is deposited in liquid-storage container 4 inner bottom parts can pass through the suction of low-pressure cavity rotary compressor, enters in compressor housing by steam outlet pipe 41, thereby low-pressure cavity rotary compressor is played to the effect of lubrication protection.
Air inlet pipeline 5 is suitable for being connected with the heat exchanger of refrigeration system (scheming not shown).For example, high temperature refrigerant through the compression of low-pressure cavity rotary compressor arrives condenser by outlet pipe 14, refrigerant after condenser condenses after expansion valve and vaporizer, becomes low-temp low-pressure refrigerant successively, and then low-temp low-pressure refrigerant enters part flow arrangement by air inlet pipeline 5.Here, it should be noted that, the configuration example of refrigeration system, as concrete structure and the working principle etc. of heat exchanger (condenser, vaporizer) and throttling arrangement (capillary tube or expansion valve) are well known to those skilled in the art, no longer describes in detail here.
Part flow arrangement comprises that the two ends of the first pipeline 61 and the second pipeline 62, the first pipelines 61 are connected with liquid-storage container 4 with air inlet pipeline 5 respectively, and the two ends of the second pipeline 62 are connected with the top of air inlet pipeline 5 and compressor housing respectively.Second pipeline 62 has for example been shown in the example of Fig. 1, thereby flowing through, low-temp low-pressure refrigerant is split into two-way after part flow arrangement, wherein a road refrigerant flows into liquid-storage container 4 by the first pipeline 61, then flow in compression chamber by the steam outlet pipe 41 of liquid-storage container 4, another road refrigerant flows into compressor cooling motor by the second pipeline 62, and can provide back pressure for compressor.Certainly, the second pipeline 62 can also be multiple (scheming not shown), further cooling so that motor is carried out.In compression chamber, after compression, obtain high-pressure refrigerant, high-pressure refrigerant arrives condenser again by outlet pipe 14, so just form a circulation, low-pressure cavity rotary compressor has now played the effect that builds the circulatory system.
Alternatively, air inlet pipeline 5, the first pipeline 61 and the second pipeline 62 are connected by three-way pipe 63.As shown in Figure 1, air inlet pipeline 5, the first pipeline 61 and one end being connected of the second pipeline 62 are provided with three-way pipe 63, three-way pipe 63 has three mouths of pipe, and air inlet pipeline 5, the first pipeline 61 and the second pipeline 62 are connected with three mouths of pipe of three-way pipe 63 respectively, easy for installation and connect firm.
According to the utility model embodiment's low-pressure cavity rotary compressor assembly 100, by part flow arrangement is set, a part the low-temp low-pressure refrigerant entering from air inlet pipeline 5 flows into compressing mechanism inside, another part flows into compressor to carry out cooling to motor, and for compressor provides back pressure, greatly improve the operational efficiency of low-pressure cavity rotary compressor, reduce energy consumption, thereby when having ensured motor reliability, improved the efficiency of low-pressure cavity rotary compressor.
Alternatively, the first pipeline 61 is the suction tude of liquid-storage container 4.With reference to Fig. 1, suction tude is located at the top of liquid-storage container 4, and the upper end of suction tude is connected with one of them mouth of pipe of three-way pipe 63, thus, without the first pipeline 61 is set separately in addition, effectively saves material and the cost of part flow arrangement, and improved the efficiency of assembling of part flow arrangement.
In an embodiment of the present utility model, low-pressure cavity rotary compressor assembly 100 further comprises: return flow line 39, return flow line 39 is formed on compressing mechanism with by compressor and compressing mechanism internal communication.For example, in the example of Fig. 1 and Fig. 2, return flow line 39 is communicated with compressor and compression chamber, the refrigerant that enters into compressor from the second pipeline 62 can enter in compression chamber by return flow line 39, thereby low-pressure cavity rotary compressor can compress the refrigerant that enters into compressor from air inlet pipeline 5, and then has improved the efficiency of low-pressure cavity rotary compressor.
Particularly, as Figure 1-Figure 4, return flow line 39 comprises: the first return flow line 311 and 321, the first return flow lines 311, the second return flow line are formed on the main bearing 31 of compressing mechanism.The second return flow line 321 is formed on the cylinder 32 of compressing mechanism, and the second return flow line 321 is communicated with jointly form return flow line 39 with the first return flow line 311 with the first return flow line 311.Alternatively, the two ends of the second return flow line 321 are communicated with the part stretching in compressor housing of the inside of the first return flow line 311 and compressing mechanism or the steam outlet pipe 41 of liquid-storage container 4 respectively.
For example, at Fig. 1, in the example of Fig. 2 and Fig. 4, the first return flow line 311 is for being formed on the return port on main bearing 31, return port runs through main bearing 31 along the vertical direction, and return port is arranged on the outside of compression chamber, the second return flow line 321 is for being formed on the back flash on cylinder 32, back flash is along the radially extension of cylinder 32, and back flash is from upper surface recessed formation downwards of cylinder 32, wherein the inner of back flash is communicated with compression chamber, the outer end of back flash is communicated with the lower end of return port, thereby the refrigerant of compressor can enter in return port from the upper end of return port, then flow into back flash by the lower end of return port, finally flow in compression chamber.Here, it should be noted that, direction " interior " can be understood as the direction towards compression chamber center, and its contrary direction is defined as " outward ", away from the direction at compression chamber center.Alternatively, the concrete shape of return port and back flash, size and quantity can be according to actual requirement settings, to meet better actual requirement.
For example, in the example of Fig. 3, the second return flow line 321 is for being formed on the step hole on cylinder 32, step hole is vertically arranged, and step hole extends downward stretching in the part in cylinder 32 and with steam outlet pipe 41 of steam outlet pipe 41 and is communicated with, thereby the refrigerant through part flow arrangement shunting can collaborate before compressing mechanism compression, in other words, with refrigerant after motor heat exchange with enter compression chamber after the refrigerant of liquid-storage container 4 can fully mix, further promote the performance of low-pressure cavity rotary compressor.Wherein, return flow line 39 can be arranged on main bearing 31 or cylinder 32 incessantly, also can be arranged on cover plate 36 parts such as grade.In addition, the shape of the second return flow line 321 can be circular, square, triangle, can also be polygonal of any shape etc.
Alternatively, angle between the plane at the central axis place of the bent axle 35 of the plane at central axis place of first central axis of return flow line 311 and the bent axle of compressing mechanism 35 and the cylinder of compressing mechanism 32 vane slot tool withdrawal grooves (scheming not shown) central axis and compressing mechanism is β, and wherein β is configured to: 38 ° of 2 ° of < β <.Thus, by angle β is set, can control air-breathing angle, thereby refrigerating capacity is controlled.Here, it should be noted that, " cylinder 32 vane slot tool withdrawal grooves " refer to the tool withdrawal groove on the vane slot of cylinder 32, and this tool withdrawal groove is positioned at one end away from compression chamber of vane slot, and to facilitate withdrawing when the machining, the shape of cross section of tool withdrawal groove is roughly circle.
In further embodiment of the present utility model, low-pressure cavity rotary compressor assembly 100 further comprises: keep off oily part 37, keep off oily part 37 and be located on main bearing 31 and around the first return flow line 311.As Figure 1-Figure 4, keep off oily part 37 for gear oil jacket cylinder, the height of gear oil jacket cylinder is higher than the height of return port, after gear oil jacket cylinder is mounted in return port, the upper-end surface of gear oil jacket cylinder exceeds the upper-end surface of return port, thereby can prevent that the lubricant oil of compressor from entering compressing mechanism inside.Alternatively, gear oil jacket cylinder and return port interference fit.Certainly, the utility model is not limited to this, and gear oil jacket cylinder can also be located at the upper end of spill port and arrange around spill port, and the internal diameter that now keeps off oil jacket cylinder can be more than or equal to the internal diameter of spill port (scheming not shown).
Alternatively, the first-class circulation passage of steam outlet pipe 41 common formation of the first pipeline 61, liquid-storage container 4 and liquid-storage container 4, the stator 21 of the second pipeline 62, motor forms second circulation passage jointly with the stator 21 of the gap of housing, motor and the gap of the rotor 22 of motor, return flow line 39, wherein the long-pending ratio α amassing with the minimum through flow cross section of first-class circulation passage of the minimum through flow cross section of second circulation passage is configured to: 0.1≤α≤0.6, and the long-pending S1 of the minimum through flow cross section of the long-pending S2 of the minimum through flow cross section of second circulation passage and first-class circulation passage meets: 3.14mm
2≤ S2≤S1.Thus, in the situation that meeting motor cooling requirement, can further promote the efficiency of low-pressure cavity rotary compressor.
With reference to Fig. 4, after part flow arrangement shunting, low-temp low-pressure refrigerant flows respectively in first-class circulation passage and second circulation passage, first-class circulation passage comprises the steam outlet pipe 41 of the first pipeline 61, liquid-storage container 4 and liquid-storage container 4, thereby flow into the refrigerant steam outlet pipe 41 of liquid-storage container 4, liquid-storage container 4 successively in the first pipeline 61 from air inlet pipeline 5, then enter in compression chamber, entering before compression chamber, refrigerant is without motor.Second circulation passage comprises the return flow line 39 arranging on the gap, stator 21 of the second pipeline 62, compressor stator 21 and compressor housing inwall and the gap of rotor 22, compressing mechanism, thereby the refrigerant in air inlet pipeline 5 flows into the second pipeline 62 enters in compressor housing, the motor carry out heat exchange with motor of flowing through.Further, second circulation passage also comprises vent (scheming not shown), vent can be respectively formed on stator 21 and rotor 22, with by the refrigerant that flows into compressor from the second pipeline 62 better guide motor bottom and with motor heat exchange.Here, it should be noted that, " minimum through flow cross section long-pending " refers to refrigerant in corresponding circulation passage (first-class circulation passage, second circulation passage) in mobile process, on circulation passage perpendicular to the minimum cross-sectional area of refrigerant a fluid stream.
Further, consider the cooling integrity problem of the motor of low-pressure cavity rotary compressor, the long-pending ratio α amassing with the minimum through flow cross section of first-class circulation passage of minimum through flow cross section of second circulation passage is configured to: 0.15≤α≤0.55, and the long-pending S1 of the minimum through flow cross section of the long-pending S2 of the minimum through flow cross section of second circulation passage and first-class circulation passage meets: 3.14mm
2≤ S2≤S1.
Further, consider the manufacturing problem of low-pressure cavity rotary compressor, the long-pending ratio α amassing with the minimum through flow cross section of first-class circulation passage of minimum through flow cross section of second circulation passage is configured to: 0.2≤α≤0.5, and the long-pending S1 of the minimum through flow cross section of the long-pending S2 of the minimum through flow cross section of second circulation passage and first-class circulation passage meets: 3.14mm
2≤ S2≤S1.
Alternatively, compressing mechanism is single cylinder or multi-cylinder structure.As shown in Figure 5-Figure 7, compressing mechanism is two cylinder 32 structures, wherein return flow line 39 can be arranged at least one cylinder 32 structure, certainly, on compressing mechanism, return flow line 39 can also be all set, wherein the concrete setting position of return flow line 39 can be on main bearing 31, on dividing plate 38 or cylinder 32.
Particularly, with reference to Fig. 5 and Fig. 6, two cylinders 32 layout that is spaced apart from each other on above-below direction, dividing plate 38 is flatly located between two cylinders 32, main bearing 31 is located at the top of the cylinder 32 of top, supplementary bearing 33 is located at the bottom of the cylinder 32 of below, main bearing 31, two cylinders 32, dividing plate 38 and supplementary bearing 33 limit upper and lower two compression chambers jointly, correspondingly, liquid-storage container 4 has two steam outlet pipes 41, two steam outlet pipes 41 are communicated with two compression chambers respectively, and on compressing mechanism, be formed with two return flow lines 39, two return flow lines 39 are communicated with two compression chambers respectively, particularly, the return flow line 39 of top is formed on the cylinder 32 of main bearing 31 and top, vertically extend the return flow line 39 of top, and the part in the cylinder 32 that stretches into top of the steam outlet pipe 41 above extending downward is also communicated with this steam outlet pipe 41, the return flow line 39 of below is formed on the cylinder 32 of below, vertically extend the return flow line 39 of below, and the part in the cylinder 32 that stretches into below of the steam outlet pipe 41 below extending downward is also communicated with this steam outlet pipe 41.
Certainly, the utility model is not limited to this, in other examples of the present utility model, have on the compressing mechanism of two cylinders 32 and can also only be formed with a return flow line 39, as shown in Figure 7, return flow line 39 is formed on the top of compressing mechanism, particularly, this return flow line 39 is formed on the cylinder 32 of main bearing 31 and top, vertically extend the return flow line 39 of top, and extend downward the part in the cylinder 32 above the stretching into of steam outlet pipe 41 of top and be communicated with this steam outlet pipe 41.
Wherein, the long-pending ratio α amassing with the minimum through flow cross section of first-class circulation passage of minimum through flow cross section of second circulation passage is configured to: 0.1≤α≤0.6, and the long-pending S1 of the minimum through flow cross section of the long-pending S2 of the minimum through flow cross section of second circulation passage and first-class circulation passage meets: 3.14mm
2≤ S2≤S1.
Further, consider the cooling integrity problem of the motor of low-pressure cavity rotary compressor, the long-pending ratio α amassing with the minimum through flow cross section of first-class circulation passage of minimum through flow cross section of second circulation passage is configured to: 0.15≤α≤0.55, and the long-pending S1 of the minimum through flow cross section of the long-pending S2 of the minimum through flow cross section of second circulation passage and first-class circulation passage meets: 3.14mm
2≤ S2≤S1.
Further, consider the manufacturing problem of low-pressure cavity rotary compressor, the long-pending ratio α amassing with the minimum through flow cross section of first-class circulation passage of minimum through flow cross section of second circulation passage is configured to: 0.2≤α≤0.5, and the long-pending S1 of the minimum through flow cross section of the long-pending S2 of the minimum through flow cross section of second circulation passage and first-class circulation passage meets: 3.14mm
2≤ S2≤S1.
As shown in Figure 8, if low-pressure cavity rotary compressor is in running, load and ambient temperature are less, corresponding motor temperature heating, even do not have return flow line 39 be refrigeration agent without larger mobility status under, still can meet reliability requirement time, the refrigeration that adopts the low-pressure cavity rotary compressor shown in Fig. 8 also can reach the low-pressure cavity rotary compressor with return flow line 39 promotes effect.
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 specific features, structure, material or the feature of description can be with suitable mode combination 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, amendment, replacement and modification to these embodiments, scope of the present utility model is limited by claim and equivalent thereof.
Claims (14)
1. a low-pressure cavity rotary compressor assembly, is characterized in that, comprising:
Compressor housing;
Motor, described motor is located at the top in described compressor housing;
Compressing mechanism, described compressing mechanism is located in described compressor housing and is connected with described motor;
Liquid-storage container, it is external that described liquid-storage container is fixed on described compression case, and the air outlet of described liquid-storage container and the internal communication of described compressing mechanism;
Air inlet pipeline, described air inlet pipeline is suitable for being connected with the heat exchanger of refrigeration system; And
Part flow arrangement, described part flow arrangement comprises the first pipeline and the second pipeline, the two ends of described the first pipeline are connected with described liquid-storage container with described air inlet pipeline respectively, and the two ends of described the second pipeline are connected with the top of described air inlet pipeline and described compressor housing respectively.
2. low-pressure cavity rotary compressor assembly according to claim 1, is characterized in that, the suction tude that described the first pipeline is described liquid-storage container.
3. low-pressure cavity rotary compressor assembly according to claim 2, is characterized in that, further comprises:
Return flow line, described return flow line is formed on described compressing mechanism with by described compressor and described compressing mechanism internal communication.
4. low-pressure cavity rotary compressor assembly according to claim 3, is characterized in that, described return flow line comprises:
The first return flow line, described the first return flow line is formed on the main bearing of described compressing mechanism; With
The second return flow line, described the second return flow line is formed on the cylinder of described compressing mechanism, and described the second return flow line is communicated with jointly form described return flow line with described the first return flow line with described the first return flow line.
5. low-pressure cavity rotary compressor assembly according to claim 4, it is characterized in that, the two ends of described the second return flow line are communicated with the part stretching in described compressor housing of the inside of described the first return flow line and described compressing mechanism or the steam outlet pipe of described liquid-storage container respectively.
6. low-pressure cavity rotary compressor assembly according to claim 4, it is characterized in that, angle between the plane at the central axis place of the cylinder vane slot tool withdrawal groove central axis of the plane at the central axis place of the central axis of described the first return flow line and the bent axle of described compressing mechanism and described compressing mechanism and the bent axle of described compressing mechanism is β, and wherein said β is configured to:
2°＜β＜38°。
7. low-pressure cavity rotary compressor assembly according to claim 4, is characterized in that, further comprises:
Keep off oily part, described gear oil part is located on described main bearing and around described the first return flow line.
8. low-pressure cavity rotary compressor assembly according to claim 3, it is characterized in that, the first-class circulation passage of the common formation of steam outlet pipe of described the first pipeline, described liquid-storage container and described liquid-storage container, gap, the described return flow line of described the second pipeline, the stator of described motor and the gap of described housing, the stator of described motor and the rotor of described motor form second circulation passage jointly
The long-pending ratio α amassing with the minimum through flow cross section of described first-class circulation passage of minimum through flow cross section of wherein said second circulation passage is configured to:
0.1≤α≤0.6。
9. low-pressure cavity rotary compressor assembly according to claim 8, is characterized in that, described α is configured to:
0.15≤α≤0.55。
10. low-pressure cavity rotary compressor assembly according to claim 9, is characterized in that, described α is configured to:
0.2≤α≤0.5。
Low-pressure cavity rotary compressor assembly in 11. according to Claim 8-10 described in any one, is characterized in that, the long-pending S1 of minimum through flow cross section of the long-pending S2 of minimum through flow cross section of described second circulation passage and described first-class circulation passage meets:
3.14mm
2≤S2≤S1。
12. low-pressure cavity rotary compressor assemblies according to claim 1, is characterized in that, described the second pipeline is one or more.
13. low-pressure cavity rotary compressor assemblies according to claim 1, is characterized in that, described compressing mechanism is single cylinder or multi-cylinder structure.
14. low-pressure cavity rotary compressor assemblies according to claim 1, is characterized in that, described air inlet pipeline, described the first pipeline and described the second pipeline are connected by three-way pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420198641.8U CN203822633U (en) | 2014-04-22 | 2014-04-22 | Rotary compressor assembly with low-pressure cavity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420198641.8U CN203822633U (en) | 2014-04-22 | 2014-04-22 | Rotary compressor assembly with low-pressure cavity |
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| CN203822633U true CN203822633U (en) | 2014-09-10 |
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| CN201420198641.8U Withdrawn - After Issue CN203822633U (en) | 2014-04-22 | 2014-04-22 | Rotary compressor assembly with low-pressure cavity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912494A (en) * | 2014-04-22 | 2014-07-09 | 广东美芝制冷设备有限公司 | Low-pressure-cavity rotary compressor component |
-
2014
- 2014-04-22 CN CN201420198641.8U patent/CN203822633U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912494A (en) * | 2014-04-22 | 2014-07-09 | 广东美芝制冷设备有限公司 | Low-pressure-cavity rotary compressor component |
| CN103912494B (en) * | 2014-04-22 | 2016-08-31 | 广东美芝制冷设备有限公司 | Low pressure chamber rotary compression thermomechanical components |
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Granted publication date: 20140910 Effective date of abandoning: 20160831 |
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