CN105317678B - Outer rotor rotary compressor - Google Patents
Outer rotor rotary compressor Download PDFInfo
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- CN105317678B CN105317678B CN201410271490.9A CN201410271490A CN105317678B CN 105317678 B CN105317678 B CN 105317678B CN 201410271490 A CN201410271490 A CN 201410271490A CN 105317678 B CN105317678 B CN 105317678B
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- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 239000003507 refrigerant Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
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Abstract
The invention discloses a kind of outer rotor rotary compressor, including：Housing, stator support, stator, rotor and compression set.There is chamber in housing.Stator support is fixed in chamber.Stator is fixed on stator support, and stator coil is wound with stator.Rotor is rotatably set in stator exterior, rotor towards magnet is embedded with the inside of stator, the upper surface of magnet is less than the upper surface of stator.Compression set is located in housing, and the upper end of the bent axle of compression set is connected with rotor.Outer rotor rotary compressor according to embodiments of the present invention, by the way that the upper surface of the magnet of rotor to be arranged to the upper surface less than stator, so that outer rotor rotary compressor is in the running, it is upward to axial magnetic force direction caused by rotor, so that the axial force that rotor is applied to bent axle is reduced, and then the mechanical loss of outer rotor rotary compressor is reduced, improve its power consumption, improve its reliability and performance.
Description
Technical Field
The invention relates to the field of compressors, in particular to an outer rotor rotary compressor.
Background
The rotary compressor is usually driven by a motor composed of a rotor and a stator, and most of the motors in the conventional art are embedded motors. The embedded motor is positioned in the stator due to the fact that the rotor is large in size, the space of the compressor is limited, the using amount of the permanent magnet is limited, and the improvement of the energy efficiency of the motor is not facilitated.
In recent years, the feasibility of applying an external rotor motor to a compressor has been widely focused, wherein the rotor of the external rotor motor is positioned outside the stator, and the compressor is an external rotor rotary compressor.
Because the structure of the outer rotor motor is completely different from that of the inner rotor motor in the prior art, the magnetic field generated between the stator and the rotor is also different. In order to ensure the performance of the compressor, the structure of the outer rotor motor needs to be improved.
Disclosure of Invention
The present invention is directed to at least solving the problems of the prior art. To this end, an object of the present invention is to provide an outer rotor rotary compressor, the performance of which can be secured.
The outer rotor rotary compressor according to the embodiment of the present invention includes: a housing having a chamber therein; a stator support fixed within the chamber; the stator is fixed on the stator bracket, and a stator coil is wound on the stator; the rotor is rotatably sleeved outside the stator, a magnet is embedded in the rotor towards the inner side of the magnet, and the upper end surface of the magnet is lower than that of the stator; and the compression device is arranged in the shell, and the upper end of a crankshaft of the compression device is connected with the rotor.
According to the outer rotor rotary compressor provided by the embodiment of the invention, the upper end surface of the magnet of the rotor is lower than the upper end surface of the stator, so that when the outer rotor rotary compressor operates, the axial electromagnetic force generated on the rotor is upward, the axial acting force applied to a crankshaft by the rotor is reduced, the mechanical loss of the outer rotor rotary compressor is further reduced, the power consumption of the outer rotor rotary compressor is improved, and the reliability and the performance of the outer rotor rotary compressor are improved.
In addition, the external rotor rotary compressor according to the present invention may further have the following additional technical features:
specifically, the distance Δ H between the upper end surface of the magnet and the upper end surface of the stator ranges from 0.1 to 0.8 cm.
In some embodiments of the invention, the lower end of the eccentric shaft of the crankshaft is provided with a thrust point, which abuts against the lower bearing of the compression device. Therefore, the contact area between the crankshaft and the lower bearing can be increased, the thrust part can axially limit the crankshaft, the bearing capacity of the crankshaft is improved, and the operation reliability of the outer rotor rotary compressor is further ensured.
In some embodiments of the invention, the lower end of the rotor is provided with thrust means imparting upward thrust. Therefore, the axial acting force applied to the crankshaft by the rotor is further reduced, and the power consumption and the reliability of the outer rotor rotary compressor are further improved.
Optionally, the thrust device is an axial fan. Therefore, the thrust device has the advantages of simple structure, easy installation and low cost.
Specifically, the thrust device is fixedly connected with the rotor and rotates synchronously. Therefore, the thrust device has small structure and low cost.
Optionally, the thrust device comprises two fixed blades that are centrosymmetric about the axis of rotation of the rotor.
In one embodiment of the present invention, the rotor is formed in a cylindrical shape with an open upper end. Therefore, the rotor has simple structure and easy processing.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 and 2 are schematic longitudinal sectional views of compressors according to two embodiments of the present invention;
FIG. 3 is an enlarged view of circled portion C of FIG. 1;
fig. 4 is a schematic structural view of a thrust device according to an embodiment of the present invention.
Reference numerals:
an outer rotor rotary compressor 100,
A shell 1, an upper shell 11, a middle shell 12, a lower shell 13, a chamber 14,
A stator frame 2, a support cylinder 21, a connecting part 22,
Motor 3, stator 31, rotor 32, magnet 33,
Compression device 4, crankshaft 41, eccentric shaft 411, first sub-shaft 412, second sub-shaft 413, thrust portion 414, cylinder 42, piston 43, upper bearing 44, lower bearing 45, and a piston rod,
Thrust device 5, axial fan 51, fixed blades 52,
A reservoir 200.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "height," "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An outer rotor rotary compressor 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 4.
The outer rotor rotary compressor 100 according to the embodiment of the present invention, as shown in fig. 1 and 2, includes: the motor comprises a shell 1, a stator bracket 2, a motor 3 and a compression device 4. The motor 3 includes a stator 31 and a rotor 32.
Specifically, the housing 1 has a chamber 14 therein, and the housing 1 is a sealed container. The structure of the housing 1 may be the housing structure of the compressor disclosed in the prior art, and is not particularly limited herein. For example, in the example shown in fig. 1 and 2, the housing 1 includes an upper housing 11, a lower housing 13, and a middle housing 12, the middle housing 12 is formed in a cylindrical shell shape with upper and lower ends open, the upper housing 11 is formed in a circular plate shape with an outer edge of the upper housing 11 extending downward, the lower housing 13 is formed in an arc-shaped panel recessed downward, the upper housing 11 and the lower housing 13 are respectively snap-fitted to upper and lower ends of the middle housing 12, and the upper housing 11, the lower housing 13, and the middle housing 12 define a chamber 14.
Referring to fig. 1 and 2, the stator frame 2 is fixed in the chamber 14, the stator 31 is fixed on the stator frame 2, a stator coil (e.g., copper wire) is wound on the stator 31, the rotor 32 is rotatably sleeved outside the stator 31, a magnet 33 is embedded on the inner side of the rotor 32 facing the stator 31, and the upper end surface of the magnet 33 is lower than the upper end surface of the stator 31. The compression device 4 is provided in the casing 1, and the upper end of the crankshaft 41 of the compression device 4 is connected to the rotor 32.
In some examples of the present invention, as shown in fig. 1 and 2, the stator frame 2 includes a support cylinder 21 and a connection portion 22, wherein the stator 31 is fitted over an outer wall of the support cylinder 21, and the connection portion 22 is extended radially outward from a top end of the support cylinder 21. Note that the radial direction refers to the direction indicated by the arrow a in fig. 1. Alternatively, the stator holder 2 is formed as a rotary body, the longitudinal section of the stator holder 2 is formed as two symmetrical "7" shapes, and the outer edge of the connecting portion 22 is connected to the inner peripheral wall of the housing 1. Of course, the stator holder 2 may be formed in other shapes as long as the stator 31 can be fixed in the cavity 14 by the stator holder 2, and is not particularly limited herein.
Specifically, the stator 31 is formed in a cylindrical shell shape with both upper and lower ends open, and the rotor 32 is open at the top end and is fitted over the stator 31.
In some examples of the present invention, as shown in fig. 1 and 2, the compression device 4 includes a cylinder 42, a piston 43, an upper bearing 44, a lower bearing 45, a crankshaft 41, and the like. An upper bearing 44 is fixed in the chamber 14 spaced apart from a lower bearing 45, a cylinder 42 is provided between the upper bearing 44 and the lower bearing 45, and a piston 43 is provided in the cylinder 42. The crankshaft 41 includes a first sub-shaft 412, a second sub-shaft 413, and an eccentric shaft 411, and the eccentric shaft 411 is connected to the piston 43.
Both ends of the crankshaft 41 protrude from the cylinder 42, the crankshaft 41 is engaged with an upper bearing 44 and a lower bearing 45, respectively, to be fixed, and an upper end of the crankshaft 41 protrudes from the upper bearing 44 to be connected to the rotor 32.
Specifically, as shown in fig. 1 and 2, the outer rotor rotary compressor 100 is connected to an accumulator 200, and the accumulator 200 may transmit a gaseous refrigerant into the cylinder 42 of the compression device 4. It should be noted that the stator coil, the magnet 33, the cylinder 42, the piston 43, the upper bearing 44, the lower bearing 45, the crankshaft 41, and the like may all adopt the structure of corresponding components of a compressor in the prior art, and the structure of the reservoir 200 is also in the prior art, and will not be described in detail here.
After the motor 3 is started, a magnetic field is generated, the magnetic field generates electromagnetic force on the rotor 32 to drive the rotor 32 to rotate, and the rotor 32 rotates to drive the crankshaft 41 to rotate. During the rotation of the crankshaft 41, the eccentric shaft 411 of the crankshaft 41 drives the piston 43 to eccentrically rotate, so that the position of the cavity between the piston 43 and the cylinder 42 is changed, and the gaseous refrigerant is compressed to form high-pressure gas.
It should be noted that the electromagnetic force generated by the magnetic field on the rotor 32 also includes the axial electromagnetic force, and the rotor thickness according to the embodiment of the present invention is smaller than the stator thickness, that is, the upper end surface of the magnet 33 on the rotor 32 is lower than the upper end surface of the stator 31, so that the axial electromagnetic force generated by the magnetic field on the rotor 32 is upward. The principle of the electromagnetic force generated by the motor 3 on the rotor 32 during operation is known in the art and will not be described in detail here.
Since the rotor 32 is provided at the upper end of the crankshaft 41, the gravity of the rotor 32 is applied to the crankshaft 41, and therefore, the contact surfaces of the upper bearing 44, the lower bearing 45 and the crankshaft 41 need to simultaneously receive the gravity of the crankshaft 41 and the shaft 32. Since the axial electromagnetic force generated to the rotor 32 by the motor 3 is upward in operation, the axial force applied to the crankshaft 41 by the rotor 32 is reduced, and the friction between the crankshaft 41 and the upper and lower bearings 44 and 45 is reduced. Accordingly, mechanical loss of the outer rotor rotary compressor 100 can be reduced, power consumption of the outer rotor rotary compressor 100 can be improved, and reliability of the outer rotor rotary compressor 100 can be improved.
According to the outer rotor rotary compressor 100 of the embodiment of the present invention, the upper end surface of the magnet 33 of the rotor 32 is set to be lower than the upper end surface of the stator 31, so that when the outer rotor rotary compressor 100 operates, the axial electromagnetic force generated to the rotor 32 is directed upwards, and the axial acting force applied to the crankshaft 41 by the rotor 32 is reduced, thereby reducing the mechanical loss of the outer rotor rotary compressor 100, improving the power consumption of the outer rotor rotary compressor 100, and improving the reliability and performance of the outer rotor rotary compressor 100.
In some embodiments of the present invention, the distance Δ H between the upper end surface of the magnet 33 and the upper end surface of the stator 31 is in the range of 0.1-0.8 cm.
In some embodiments of the invention, as shown in fig. 1 and 3, the lower end of the eccentric shaft 411 of the crankshaft 41 is provided with a thrust portion 414, and the thrust portion 414 abuts against the lower bearing 45 of the compression device 4. That is, the thrust portion 414 has a thrust function, so that a contact area between the crankshaft 41 and the lower bearing 45 can be increased, the thrust portion 414 can axially limit the crankshaft 41, the bearing capacity of the crankshaft 41 is improved, and the operation reliability of the outer rotor rotary compressor 100 is further ensured. Here, the axial direction refers to the direction indicated by the arrow B in fig. 1.
In the example shown in fig. 3, the first sub-shaft 412 extends downward from the lower surface of the eccentric shaft 411, the second sub-shaft 413 extends downward from the lower surface of the first sub-shaft 412, the second sub-shaft 413 extends into the lower bearing 45 to be matched with the lower bearing 45, the end surface of the first sub-shaft 412 facing the second sub-shaft 413 is abutted against the upper end surface of the lower bearing 45, that is, the first sub-shaft 412 is in surface contact with the lower bearing 45, the end surface of the first sub-shaft 412 facing the second sub-shaft 413 is a shoulder of the crankshaft 41, and the end surface of the first sub-shaft 412 facing the second sub-shaft 413 constitutes a thrust portion 414 of the crankshaft 41.
Of course, the present invention is not limited thereto, for example, the outer rotor rotary compressor 100 may further include a thrust bearing (not shown) which may be fixed in the chamber 14 and sleeved on the crankshaft 41, wherein a contact portion of the crankshaft 41 with the thrust bearing may also constitute the thrust portion 414 of the crankshaft 41.
In some embodiments of the present invention, as shown in fig. 1 and 2, the rotor 32 is formed in a cylindrical shape with an open upper end, that is, the longitudinal section of the rotor 32 is formed in a "U" shape. This simplifies the structure of the rotor 32 and facilitates the machining.
Alternatively, an exhaust hole is formed on an upper end surface of the upper bearing 44, and the high-pressure refrigerant gas compressed in the cylinder 42 is exhausted from the exhaust hole, so that the exhausted high-pressure refrigerant gas may impact on a lower surface of the rotor 32 to generate an upward acting force on the rotor 32, and thus, an axial acting force applied to the crankshaft 41 by the rotor 32 when the motor 3 is in operation may be reduced.
In some embodiments of the present invention, as shown in fig. 2, the lower end of the rotor 32 is provided with a thrust device 5 for applying an upward thrust, so as to further reduce the axial acting force applied by the rotor 32 to the crankshaft 41, reduce the stress on the thrust portion 414, and further improve the power consumption and reliability of the outer rotor rotary compressor 100. Alternatively, the thrust device 5 is an axial fan 51. Thus, the thrust device 5 has a simple structure, is easy to install, and is low in cost. Further alternatively, as shown in fig. 2 and 4, the thrust device 5 comprises two fixed blades 52 that are centrosymmetric about the rotation axis of the rotor 32.
Specifically, the thrust device 5 is fixedly connected with the rotor 32 and rotates synchronously, that is, the thrust device 5 does not have a separate driver, and the thrust device 5 is driven by the rotor 32 to generate thrust, so that the thrust device 5 is small in structure and low in cost.
Of course, the thrust device 5 is not limited thereto, and for example, the thrust device 5 may be a turbine groove formed on the bottom wall of the rotor 32, an inlet of the turbine groove being located on the side wall of the rotor 32, and an outlet of the turbine groove being provided on the bottom wall of the rotor 32. When the rotor 32 rotates, gas is sucked into the turbine groove from the inlet, the gas in the turbine groove is blown out from the outlet, and the blown gas is repelled to the rotor 32 after encountering an obstacle, thereby generating an upward thrust force on the rotor 32.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. An outer rotor rotary compressor, comprising:
a housing having a chamber therein;
a stator support fixed within the chamber;
the stator is fixed on the stator bracket, and a stator coil is wound on the stator;
the rotor is rotatably sleeved outside the stator, a magnet is embedded in the rotor towards the inner side of the stator, and the upper end surface of the magnet is lower than that of the stator; and
the compression device is arranged in the shell, and the upper end of a crankshaft of the compression device is connected with the rotor; wherein,
the lower end of the rotor is provided with a thrust device which gives upward thrust, and the thrust device is an axial flow fan.
2. The outer rotor rotary compressor of claim 1, wherein a distance Δ H between the upper end surfaces of the magnets and the upper end surface of the stator is in a range of 0.1-0.8 cm.
3. The external rotor rotary compressor of claim 1, wherein a lower end of the eccentric shaft of the crankshaft is provided with a thrust portion, and the thrust portion abuts against a lower bearing of the compression device.
4. The outer rotor rotary compressor of claim 1, wherein the thrust device is fixedly connected to the rotor and rotates synchronously.
5. The outer rotor rotary compressor of claim 4, wherein the thrust device includes two stationary blades that are centrosymmetric about the axis of rotation of the rotor.
6. The outer rotor rotary compressor of claim 1, wherein the rotor is formed in a cylindrical shape with an open upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271490.9A CN105317678B (en) | 2014-06-17 | 2014-06-17 | Outer rotor rotary compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271490.9A CN105317678B (en) | 2014-06-17 | 2014-06-17 | Outer rotor rotary compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105317678A CN105317678A (en) | 2016-02-10 |
| CN105317678B true CN105317678B (en) | 2018-01-12 |
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| CN201410271490.9A Active CN105317678B (en) | 2014-06-17 | 2014-06-17 | Outer rotor rotary compressor |
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| CN105952647A (en) * | 2016-06-20 | 2016-09-21 | 广东美芝制冷设备有限公司 | Rotary compressor |
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| US11022119B2 (en) | 2017-10-03 | 2021-06-01 | Emerson Climate Technologies, Inc. | Variable volume ratio compressor |
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| US10962008B2 (en) | 2017-12-15 | 2021-03-30 | Emerson Climate Technologies, Inc. | Variable volume ratio compressor |
| US10995753B2 (en) | 2018-05-17 | 2021-05-04 | Emerson Climate Technologies, Inc. | Compressor having capacity modulation assembly |
| US11655813B2 (en) | 2021-07-29 | 2023-05-23 | Emerson Climate Technologies, Inc. | Compressor modulation system with multi-way valve |
| US12259163B2 (en) | 2022-06-01 | 2025-03-25 | Copeland Lp | Climate-control system with thermal storage |
| US11846287B1 (en) | 2022-08-11 | 2023-12-19 | Copeland Lp | Scroll compressor with center hub |
| US11965507B1 (en) | 2022-12-15 | 2024-04-23 | Copeland Lp | Compressor and valve assembly |
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| CN105317678A (en) | 2016-02-10 |
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