CN217440290U - Scroll compressor for oxygenerator - Google Patents

Abstract

The utility model provides a scroll compressor for oxygenerator, including the casing, the bottom of casing is equipped with the bearing frame, and the top is equipped with fixed scroll, still include one end and rotate insert locate in the bearing frame and with the coaxial bent axle that sets up of casing, connect the motion scroll of the other end of bent axle, the scroll of fixed scroll and the scroll dislocation of motion scroll mesh form the compression chamber, form the cooling cavity between the junction of motion scroll and bent axle and the casing inside wall, fixed scroll is last still to have seted up induction port and gas vent; the anti-rotation mechanism further comprises a motor used for driving the crankshaft to rotate, and one end of the motor is connected with the moving scroll plate while the other end of the motor is connected with the shell. The utility model discloses need not to adopt lubricating oil to seal up and cool off, the air of compression can not the gas mixture, utilizes structural design to effectively cool down, reduces the whole volume of equipment, satisfies the air pressurization of oxygenerator, compact structure, operate steadily, efficient.

Description

Scroll compressor for oxygenerator

Technical Field

The utility model relates to an oxygenerator technical field, more specifically relates to a scroll compressor for oxygenerator.

Background

The scroll compressor is a positive displacement compressor, and is also a compressor with wide application range and mature technology, and the compression of working fluid is realized mainly by the reciprocating increase and decrease of the volume of a moon-shaped cavity between a movable scroll plate and a fixed scroll plate. The compression part of the scroll compressor consists of a movable scroll and a fixed scroll, the processes of air suction, compression and exhaust are continuously and unidirectionally carried out, the pressure difference between adjacent working cavities is small, and the gas leakage is less; the expansion process of gas in the clearance volume to the air suction cavity is avoided, the volume efficiency is high and is generally up to more than 95%; all points on the movable vortex body synchronously rotate with a gyration radius of a few millimeters, so the movement speed is low, the friction loss is small, and the flow loss of the airflow is small. Generally, lubricating oil is added to a scroll compressor to lubricate and seal the compressor, thereby ensuring reliable operation of the compressor. After the compressor finishes gas compression, the gas and the lubricating oil mixed with the gas are usually separated together, so that the subsequent use is convenient, and the oil in the gas cannot be completely separated in the subsequent oil-gas separation mode. With the development of society, the demand for pure compressed gas is higher and higher, and in some specific fields, the requirement for oil content of the compressed gas is strict, and even the gas is not allowed to be in direct contact with lubricating oil. Especially in the air compression of oxygenerator, compressed air prepares high concentration oxygen, and oxygen supplies the human body to use after carrying out concentration control, and in this process, if carry oil gas in the air, can greatly influence user experience, and oxygen quality is also unqualified simultaneously.

To above-mentioned this kind of condition, when using scroll compressor in the oxygenerator, abandoned lubricating oil simultaneously and lubricated under the condition of sealing and refrigerated structure, need carry out design and research and development again to scroll compressor's overall structure, the oxygenerator is small, when being used for compressed air in being applied to the oxygenerator with scroll compressor, its structure and volume all need carry out the improvement of adaptability, in order to satisfy it and cool off and sealed when not using lubricating oil, utilize overall structure design to reach effective radiating purpose, guarantee simultaneously that it reaches certain compression efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the unable fine not enough of being applied to the oxygenerator of current sealed and refrigerated scroll compressor of lubricating oil, provide a scroll compressor for oxygenerator. The utility model discloses need not to adopt lubricating oil to seal up and cool off, the air of compression can not the gas mixture, utilizes structural design to effectively cool down, reduces the whole volume of equipment, satisfies the air pressurization of oxygenerator, compact structure, operate steadily, efficient.

In order to solve the technical problem, the utility model discloses a technical scheme is:

a scroll compressor for an oxygenerator comprises a shell, wherein a bearing seat is arranged at the bottom of the shell, a scroll is fixed at the top of the shell, and a scroll opening of the fixed scroll faces the inside of the shell;

the scroll compressor also comprises a crankshaft, one end of the crankshaft is rotatably inserted in the bearing seat and is coaxially arranged with the shell, a moving scroll is connected with the other end of the crankshaft, a scroll opening of the moving scroll faces a scroll opening of the fixed scroll, the scroll of the fixed scroll and the scroll of the moving scroll are in staggered fit to form a compression cavity, the fixed scroll is also provided with an air suction port communicated with the space outside the compression cavity and an air exhaust port communicated with the space in the middle of the compression cavity, and a cooling cavity is formed between the connecting part of the moving scroll and the crankshaft and the inner side wall of the shell;

the motor is positioned in the shell and drives the moving scroll to move by the rotation of the crankshaft;

the anti-rotation structure is located between the moving vortex plate and the shell, and enables the moving vortex plate to do plane circular motion relative to the fixed vortex plate.

Compared with the scroll compressor used in the traditional air conditioning field, the utility model has no lubricating oil in the compression process, and the leakage clearance is reduced by the structural precision of the movable scroll and the fixed scroll, thereby realizing the sealing performance; meanwhile, the utility model abandons the lubricating oil for sealing and cooling, and leaves a cooling cavity between the connecting part of the moving vortex disc and the crankshaft and the inner side wall of the shell to form an annular space, so that one side of the moving vortex disc can be cooled by air to achieve a certain cooling effect; meanwhile, the motor is packaged in the shell, the crankshaft is driven to rotate in the bearing seat through the motor, the top of the fixed scroll plate is directly communicated with the outside through the exhaust hole, and a high-low pressure partition plate is not additionally arranged, so that the overall size is reduced, the structure is compact, and the operation is stable.

It should be noted that the utility model discloses a theory of operation does: when the gas compressor is installed, the end part of the fixed scroll is contacted with the bottom of the moving scroll, the moving scroll is contacted with the fixed scroll on the axis and is in contact with the tangent point of the fixed scroll on the cross section, so that a series of crescent-shaped spaces called as element volumes are formed between the moving scroll and the fixed scroll, and a compression cavity formed by staggered meshing of the scroll of the fixed scroll and the scroll of the moving scroll is a gas compression cavity; when the compressor operates, the motor is electrified to drive the crankshaft to rotate, the fixed scroll plate is fixed along with the planar circumference rotation of the moving scroll plate, gas is sucked from the port of the involute of the scroll and fills the crescent space to complete the suction process, the crescent space on the outer side gradually moves from outside to inside, the volume of the element is continuously reduced, the gas pressure is continuously increased, and the compression process is carried out; when the gas reaches the central part, when different crescent-shaped spaces move to the central cavity part of the compression cavity and are converged, the central cavity is communicated with the exhaust hole, and the compressed air reaches the central cavity of the compression cavity and is exhausted through the exhaust hole to finish the exhaust process; it should be noted that, in the whole compression process, the air suction and the air exhaust process exist simultaneously, and the compression efficiency is high.

Furthermore, a through hole is formed in the shell and communicated with the cooling cavity. Like this, through cooling cavity and external environment intercommunication, form the air current circulation, further improve cooling efficiency, provide more effective selection for oil-free scroll compressor's cooling method.

Furthermore, sealing strips are embedded in the end faces of the scrolls of the moving scroll and the fixed scroll. Therefore, the sealing groove is formed in the scroll end face of the scroll plate, the sealing strip is arranged in the sealing groove, the sealing strip is in contact with the scroll plate, the sealing strips on two sides of the scroll end face of the movable scroll plate and the fixed scroll plate are abutted against each other on the contact surface, and the compression cavity is sealed.

Furthermore, the air suction port comprises a first air suction port and a second air suction port, and the first air suction port and the second air suction port are respectively communicated with the scroll ports of the fixed scroll and the moving scroll. Therefore, on one hand, by arranging the two air suction ports which are respectively arranged at the openings of the scroll ports of the fixed scroll and the moving scroll which are meshed in a staggered manner, the compression path of compressed air can be reduced, so that the generation of compression heat of the compressed air is reduced, the temperature rise of the scroll can be reduced, and the service life of the whole equipment is prolonged; on the other hand, two air suction ports are arranged to ensure the flow of active air suction of the crescent space, so that the compression efficiency is improved, and when the air compressor is applied at medium and low temperatures, the air compressor ensures smaller volume and high efficiency and energy conservation (high volumetric efficiency) under the condition of the same compression conveying capacity.

Further, the moving scroll is rotated by 180 ° around the axis of the fixed scroll in a staggered engagement, and the axis of the moving scroll is offset with respect to the axis of the fixed scroll. Like this, the relative fixed scroll of motion scroll dish looks difference 180 degrees opposition to there is the off-centre, can guarantee the maximize of primitive volume, guarantees that the gas compression capacity in the crescent space of symmetry both sides is unanimous, guarantees that the compression distance of both sides is unanimous, and the temperature variation of control compression process further improves compression efficiency.

Furthermore, the bearing seat comprises a first bearing sleeved on the outer side wall of the crankshaft, an annular cavity is formed between the first bearing and the shell, and one end of the crankshaft is located in the annular cavity. Like this, the one end of bent axle relies on first bearing fixed, and other end drive motion vortex dish relies on motor drive, and such structural design can reduce the rotational friction of bent axle, and its rotation efficiency is high, and the one end of bent axle can be given in the design of the annular space of reserving dispels the heat, in actual design, also can be with the external intercommunication of annular space and casing, further improves the radiating effect.

Furthermore, the anti-rotation structure is one of a cross connecting ring, a spherical coupling and a cylindrical pin coupling.

It should be noted that the fixed scroll is fixed on the frame, and only by configuring the anti-rotation mechanism, the moving scroll can perform a planar circular motion around the center of the fixed scroll. Several common anti-rotation structures such as a cross connecting ring, a spherical coupling and a cylindrical pin coupling can meet the purpose that a moving scroll plate does planar circular motion relative to a fixed scroll plate: the cross connecting ring is in sliding clamping connection with the movable scroll through a pair of rectangular sliding grooves in the ring, the back of the movable scroll can be provided with a pair of sliding blocks for matching, the other pair of rectangular sliding blocks is in sliding connection with the shell, the shell can be provided with a pair of sliding grooves for matching, and meanwhile, the cross connecting ring is matched with a crankshaft, so that the translation of the movable scroll is finally realized; the spherical coupling can be formed by combining two orifice plates with identical geometric shapes and clamping and embedding steel balls together at a certain eccentricity, wherein a movable orifice plate is fastened on the back of a moving scroll plate, a fixed orifice plate is fixed on a shell, and the steel balls rotate between the movable orifice plate and the fixed orifice plate; in cylindric lock shaft coupling accessible cylindric lock upper end inserts the motion vortex dish, can set up corresponding complex round hole on the motion vortex dish, during the cylindric lock lower part gos deep into the casing, the casing also can set up corresponding complex round hole, and the bent axle makes the motion vortex dish motion, and the cylindric lock is restricted to play in the casing is the round hole and prevents the rotation effect.

Further, still be equipped with the bearing assembly between fixed vortex dish and the casing, the bearing assembly is including the second bearing and the third bearing of locating the bent axle lateral wall in proper order cover to and be used for the bearing bracket of fixed second bearing and third bearing, fixed vortex dish and casing are connected respectively to the bearing bracket both ends, and the cooling cavity is located between second bearing and the third bearing. Therefore, the connection of the bearing frame and the connection of the two bearings further improve the rotation reliability and stability of the crankshaft and improve the integral compactness of the device.

Furthermore, a plurality of first heat dissipation guide plates which are arranged around the exhaust port in a dispersing mode are arranged at the top of the fixed scroll, and a plurality of second heat dissipation guide plates which are distributed around the circumferential direction of the shell are arranged on the outer side of the shell. Like this, through setting up first heat dissipation baffle, can reduce the compression chamber in compression process because the high temperature that volume compression produced carries out certain degree of heat dissipation, improves the heat dispersion of device. The inside motor drive bent axle that is equipped with of casing also can produce the heat among the motor operation process, carries out the heat dissipation of certain degree through second heat dissipation baffle, also can improve the heat dispersion of device.

Further, the motor is one of a brushless dc motor, a brushed dc motor, a single phase motor, and a three phase motor.

The utility model discloses a bottom of casing can also be equipped with a plurality of mounting holes around casing axial distribution. Like this, can be more convenient fast through the mounting hole with the utility model discloses in device installation and the oxygenerator, make things convenient for dismouting and maintenance.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) compared with the scroll compressor used in the traditional air conditioning field, the utility model has no lubricating oil in the compression process, and the leakage clearance is reduced by the structural precision of the movable scroll and the fixed scroll, thereby realizing the sealing performance; simultaneously the utility model discloses when having abandoned lubricating oil and sealing up and cooling, leave the cooling cavity between the junction of motion vortex dish and bent axle and the casing inside wall, form an annular space, can utilize the air to cool off one side of motion vortex dish, the air of compression can not mix oil gas, utilizes structural design to effectively cool down.

(2) The utility model discloses be applied to in the oxygenerator, through the motor circular telegram, it is rotatory to drive the bent axle, breathing in, the compression, carminative operation in-process, fixed vortex dish is fixed in the frame, the motion vortex dish is by crankshaft drive and by preventing the restriction of rotation structure, around fixed vortex dish base circle, do the plane rotation of very little radius, gaseous through being inhaled the outside space of fixed vortex dish, along with the rotation of bent axle, gaseous fixed vortex dish and motion vortex dish bite and close the compression intracavity of constituteing and be progressively compressed, then discharge in succession by the exhaust hole of fixed vortex dish, accomplish high-efficient gas compression.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at B;

fig. 4 is a schematic view of the air compression process of the present invention.

The graphic symbols are as follows:

1-shell, 11-second heat dissipation guide plate, 12-mounting hole, 2-bearing seat, 21-ring cavity, 22-first bearing, 3-fixed scroll, 31-first heat dissipation guide plate, 4-crankshaft, 5-moving scroll, 53-sealing strip, 54-cooling cavity, 6-compression cavity, 7-air suction port, 8-air exhaust port, 9-motor, 10-bearing assembly, 101-second bearing, 102-third bearing, and 103-bearing frame.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better explanation of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Example 1

As shown in fig. 1 to 4, a scroll compressor for an oxygenator includes a housing 1, a bearing seat 2 is disposed at the bottom of the housing 1, a fixed scroll 3 is disposed at the top of the housing 1, and a scroll of the fixed scroll 3 opens into the housing 1;

the compressor further comprises a crankshaft 4, one end of the crankshaft 4 is rotatably inserted into the bearing seat 2 and is coaxially arranged with the shell 1, a moving scroll 5 is connected with the other end of the crankshaft 4, a scroll opening of the moving scroll 5 faces a scroll opening of the fixed scroll 3, scrolls of the fixed scroll 3 and scrolls of the moving scroll 5 are meshed in a staggered mode to form a compression cavity 6, the fixed scroll 3 is further provided with an air suction port 7 communicated with the space outside the compression cavity 6 and an air exhaust port 8 communicated with the space in the middle of the compression cavity 6, and a cooling cavity 54 is formed between the connecting position of the moving scroll 5 and the crankshaft 4 and the inner side wall of the shell 1;

the device also comprises a motor 9 which is connected with the crankshaft 4 and used for driving the crankshaft 4 to rotate, wherein the motor 9 is positioned in the shell 1, and the crankshaft 4 rotates to drive the moving scroll 5 to move;

still include that one end connects motion vortex dish 5 and the other end connects the anti-rotation structure of casing 1, prevent that rotation structure is located between motion vortex dish 5 and the casing 1, prevent that rotation structure makes motion vortex dish 5 do plane circular motion for fixed vortex dish 3.

Compared with a scroll compressor used in the field of traditional air conditioners, the compression method has the advantages that lubricating oil does not participate in the compression process, the leakage gap is reduced by means of the structural accuracy of the moving scroll 5 and the fixed scroll 3, and the sealing performance is realized; meanwhile, lubricating oil is abandoned for sealing and cooling, a cooling cavity 54 is reserved between the connecting part of the moving scroll 5 and the crankshaft 4 and the inner side wall of the shell 1 to form an annular space, and one side of the moving scroll 5 can be cooled by air, so that a certain cooling effect is achieved; meanwhile, the motor 8 is packaged in the shell 1, the crankshaft 4 is driven to rotate in the bearing seat 2 through the motor 8, the top of the fixed scroll 3 is directly communicated with the outside through the exhaust hole, a high-pressure and low-pressure partition plate is not additionally arranged, the overall size is reduced, the structure is compact, and the operation is stable.

The working principle of the embodiment is as follows: when the gas compressor is installed, the end part of the fixed scroll 3 is contacted with the bottom part of the moving scroll 5, the moving scroll 5 is contacted with the fixed scroll 3 on the axis, and is in contact with the tangent point of the fixed scroll 3 and the moving scroll 5 on the cross section, so that a series of crescent-shaped spaces, which are called element volumes, are formed between the moving scroll 5 and the fixed scroll 3, and the compression cavity 6 formed by the staggered meshing of the scroll of the fixed scroll 3 and the scroll of the moving scroll 5 is a gas compression cavity; as shown in fig. 4, during operation, the motor 9 is energized to drive the crankshaft 4 to rotate, the fixed scroll 3 is fixed and does not move along with the rotation of the plane circumference of the moving scroll 5, gas is sucked from the port of the involute of the scroll and fills the crescent space to complete the suction process, the crescent space on the outer side gradually moves from outside to inside, the volume of the element is continuously reduced, the gas pressure is continuously increased, and the compression process is performed; when the gas reaches the central part, when different crescent-shaped spaces move to the central cavity part of the compression cavity 6 and are converged, the central cavity is communicated with the exhaust hole, and the compressed air reaches the central cavity of the compression cavity 6 and is exhausted through the exhaust hole to finish the exhaust process; it should be noted that, in the whole compression process, the air suction and the air exhaust process exist simultaneously, and the compression efficiency is high.

In this embodiment, the housing 1 is provided with a through hole, and the through hole is communicated with the cooling cavity 54. In this way, the cooling cavity 54 communicates with the external environment to provide airflow for further cooling efficiency, and a more efficient option is provided for cooling the oil-free scroll compressor.

As shown in fig. 1, sealing strips 53 are embedded in the end faces of the scrolls of the moving scroll 5 and the fixed scroll 3. Therefore, the sealing groove is formed in the end face of the volute spiral, the sealing strips 53 are arranged in the sealing groove, so that the sealing strips 53 are in contact with the volute spiral, the sealing strips 53 on the two sides of the end face of the volute spiral of the movable volute spiral 5 and the fixed volute spiral 3 are abutted to the contact surface, and the compression chamber 6 is sealed.

As shown in fig. 1, the suction port 7 includes a first suction port and a second suction port, which are respectively communicated with the scroll ports of the fixed scroll 3 and the moving scroll 5. Therefore, on one hand, by arranging the two air suction ports 7 which are respectively arranged at the openings of the scroll ports of the fixed scroll 3 and the moving scroll 5 which are meshed in a staggered manner, the compression path of compressed air can be reduced, so that the generation of compression heat of the compressed air is reduced, the temperature rise of the scrolls can be reduced, and the service life of the whole equipment is prolonged; on the other hand, two air suction ports 7 are arranged to ensure the flow of active air suction of the crescent space, so that the compression efficiency is improved, and when the air compressor is applied at medium and low temperatures, the air compressor ensures smaller volume and high efficiency and energy conservation (high volumetric efficiency) under the condition of the same compression conveying capacity.

In the present embodiment, the orbiting scroll 5 is engaged with the fixed scroll 3 so as to be rotated by 180 ° in a staggered manner, and the axis of the orbiting scroll 5 is offset from the axis of the fixed scroll 3. Like this, the 180 degrees opposition that differ of motion vortex dish 5 relative fixed vortex dish 3 to there is the off-centre, can guarantee the volumetric maximize of primitive, guarantee that the gas compression capacity in the crescent space of symmetry both sides is unanimous, guarantee that the compression distance of both sides is unanimous, control compression process's temperature variation, further improve compression efficiency.

As shown in fig. 2 and 3, the bearing housing 2 includes a first bearing 22 disposed on an outer side wall of the crankshaft 4, an annular cavity 21 is formed between the first bearing 22 and the housing 1, and one end of the crankshaft 4 is located in the annular cavity 21. Like this, the one end of bent axle 4 relies on first bearing 22 to be fixed, and other end drive motion vortex dish relies on motor 9 drive, and such structural design can reduce bent axle 4's rotational friction, and its rotation efficiency is high, and the annular cavity 21's of reserving design can dispel the heat for bent axle 4's one end, reduces the bulk temperature of equipment, improves life.

In this embodiment, the rotation preventing structure is a cross connecting ring.

It should be noted that the fixed scroll 3 is fixed on the frame, and only by configuring the anti-rotation mechanism, the moving scroll 5 can make a planar circular motion around the center of the fixed scroll 3. The cross connecting ring is in sliding clamping connection with the movable scroll 5 through a pair of rectangular sliding grooves in the ring, the back face of the movable scroll 5 is provided with a sliding block for matching, the other pair of rectangular sliding blocks is in sliding connection with the shell 1, the shell 1 can be provided with a pair of sliding grooves for matching, and meanwhile, the cross connecting ring is matched with the crankshaft 4 to finally realize the translation of the movable scroll 5.

As shown in fig. 2, a bearing assembly 10 is further disposed between the fixed scroll 3 and the housing 1, the bearing assembly 10 includes a second bearing 101 and a third bearing 102 sequentially sleeved on an outer side wall of the crankshaft 1, and a bearing frame 103 for fixing the second bearing 101 and the third bearing 102, two ends of the bearing frame 103 are respectively connected to the fixed scroll 3 and the housing 1, and the cooling cavity 54 is located between the second bearing 101 and the third bearing 102. By connecting the bearing holder 103 and the two bearings in this way, the rotational reliability and stability of the crankshaft 4 are further improved, and the overall compactness of the device is improved.

In the present embodiment, the motor 9 is a brushless dc motor.

As shown in fig. 1, the top of the fixed scroll 3 is opened with a plurality of first heat dissipation guide plates 31 divergently arranged around the exhaust port 8. Thus, by arranging the first heat dissipation guide plate 31, the high temperature generated by volume compression in the compression process of the compression cavity 6 can be reduced, heat dissipation is carried out to a certain degree, and the heat dissipation performance of the device is improved.

As shown in fig. 1, a plurality of second heat dissipation guide plates 11 distributed around the circumference of the housing 1 are disposed outside the housing 1. Therefore, the motor driving crankshaft 4 is arranged in the shell 1, heat is generated in the operation process of the motor 9, and the heat dissipation performance of the device can be improved by dissipating heat to a certain degree through the second heat dissipation guide plate 11.

As shown in fig. 1, the bottom of the housing 1 is further provided with three mounting holes 12 axially distributed around the housing 1. Like this, can be more convenient install this embodiment in the oxygenerator fast through mounting hole 12, make things convenient for dismouting and maintenance.

Example 2

This embodiment is similar to embodiment 1, except that in this embodiment, the motor 9 is a brush dc motor. Other structures and principles of this embodiment are the same as those of embodiment 1.

Example 3

This embodiment is similar to embodiment 1, except that in this embodiment, the motor 9 is a single-phase motor. Other structures and principles of this embodiment are the same as those of embodiment 1.

Example 4

This embodiment is similar to embodiment 1, except that in this embodiment, the motor 9 is a three-phase motor. Other structures and principles of this embodiment are the same as those of embodiment 1.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The scroll compressor for the oxygenerator is characterized by comprising a shell (1), wherein a bearing seat (2) is arranged at the bottom of the shell (1), a fixed scroll (3) is arranged at the top of the shell (1), and a scroll opening of the fixed scroll (3) faces the inside of the shell (1);

the compressor is characterized by further comprising a crankshaft (4) with one end rotatably inserted into the bearing seat (2) and coaxially arranged with the shell (1), a moving scroll (5) connected with the other end of the crankshaft (4), wherein a scroll opening of the moving scroll (5) faces a scroll opening of the fixed scroll (3), a scroll of the fixed scroll (3) and a scroll of the moving scroll (5) are in staggered fit to form a compression cavity (6), the fixed scroll (3) is further provided with an air suction port (7) communicated with the space outside the compression cavity (6) and an air exhaust port (8) communicated with the space in the middle of the compression cavity (6), and a cooling cavity (54) is formed between the joint of the moving scroll (5) and the crankshaft (4) and the inner side wall of the shell (1);

the device is characterized by further comprising a motor (9) which is connected with the crankshaft (4) and used for driving the crankshaft (4) to rotate, wherein the motor (9) is located inside the shell (1), and the crankshaft (4) rotates to drive the moving scroll (5) to move;

the vortex plate rotation preventing device is characterized by further comprising an anti-rotation structure, one end of the anti-rotation structure is connected with the moving vortex plate (5), the other end of the anti-rotation structure is connected with the shell (1), the anti-rotation structure is located between the moving vortex plate (5) and the shell (1), and the anti-rotation structure enables the moving vortex plate (5) to do plane circular motion relative to the fixed vortex plate (3).

2. The scroll compressor for the oxygen generator as recited in claim 1, wherein the housing (1) is provided with a through hole, and the through hole is communicated with the cooling cavity (54).

3. The scroll compressor for an oxygen generator as recited in claim 1, wherein sealing strips (53) are embedded in scroll end faces of the moving scroll (5) and the fixed scroll (3).

4. The scroll compressor for an oxygen generator according to claim 1, wherein the suction port (7) comprises a first suction port and a second suction port which communicate with scroll openings of the fixed scroll (3) and the orbiting scroll (5), respectively.

5. The scroll compressor for an oxygen generator according to claim 4, wherein the moving scroll (5) is engaged with being rotated by 180 ° about the axis of the fixed scroll (3) in a misaligned manner, and the axis of the moving scroll (5) is offset with respect to the axis of the fixed scroll (3).

6. The scroll compressor for the oxygen generator as recited in claim 1, wherein the bearing housing (2) comprises a first bearing (22) fitted over an outer side wall of the crankshaft (4), an annular cavity (21) is formed between the first bearing (22) and the housing (1), and one end of the crankshaft (4) is located in the annular cavity (21).

7. The scroll compressor for an oxygen generator as recited in claim 1, wherein the anti-rotation structure is one of a cross connecting ring, a ball coupling and a cylindrical pin coupling.

8. The scroll compressor for the oxygen generator as claimed in claim 1, wherein a bearing assembly (10) is further disposed between the fixed scroll (3) and the housing (1), the bearing assembly (10) includes a second bearing (101) and a third bearing (102) sequentially sleeved on an outer side wall of the crankshaft (1), and a bearing bracket (103) for fixing the second bearing (101) and the third bearing (102), two ends of the bearing bracket (103) are respectively connected to the fixed scroll (3) and the housing (1), and the cooling cavity (54) is located between the second bearing (101) and the third bearing (102).

9. The scroll compressor for the oxygen generator as claimed in claim 1, wherein the top of the fixed scroll (3) is provided with a plurality of first heat dissipation guide plates (31) divergently arranged around the exhaust port (8), and the outer side of the housing (1) is provided with a plurality of second heat dissipation guide plates (11) circumferentially distributed around the housing (1).

10. The scroll compressor for an oxygen generator as recited in claim 1, wherein the motor (9) is one of a brushless dc motor, a brushed dc motor, a single phase motor, and a three phase motor.

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