KR20110015852A - Compressor - Google Patents

Abstract

PURPOSE: A compressor is provided to reduce lateral vibration due to eccentric rotation and facilitate production and assembly. CONSTITUTION: A compressor comprises a sealed container, a stator, a fixing member, a rotating member, an upper bearing cover(136), a lower bearing cover(138), an intake port(136c), and a discharge port(136d). The refrigerant is supplied to the sealed container and is discharged from the sealed container. The stator is fixed within the sealed container. The upper end and the lower end of the fixing member are installed in the sealed container, so a fixed axis(141) is not moved. The rotating member is located between the stator and the fixing member and is rotated by the rotation electromagnetic field from a stator. The upper bearing cover and the lower bearing cover form the upper and lower parts of the rotating member and rotate together with the rotating member. The intake port is formed on the upper bearing cover or the lower part bearing cover in order to supply the refrigerant to the inside of a compression space.

Description

Compressor {COMPRESSOR}

The present invention relates to a compressor for compressing a refrigerant while rotating in a state in which a rotating member is suspended from a stationary member. In particular, the present invention relates not only to structural stabilization, but also to improve assembly, and to reduce the height of the compressor and simultaneously to suction and discharge the refrigerant. This relates to a compressor that can be effectively made.

Generally, a compressor is a mechanical device that increases power by receiving air from a power generator such as an electric motor or a turbine and compressing air, a refrigerant, or various other working gases, and a home appliance such as a refrigerator and an air conditioner. Or widely used throughout the industry.

These compressors can be classified into reciprocating compressors for compressing refrigerant while linearly reciprocating inside the cylinders by forming a compression space in which the working gas is absorbed and discharged between the piston and the cylinder. ), A rotary compressor for compressing the working gas in a compression space formed between an eccentrically rotating roller and a cylinder, and between an orbiting scroll and a fixed scroll. It is divided into a scroll compressor (Scroll compressor) for compressing the refrigerant while the rotating scroll is rotated along the fixed scroll to form a compression space in which the working gas is absorbed and discharged.

Reciprocating compressors have good mechanical efficiency, while these reciprocating motions cause serious vibration and noise problems. Because of these problems, rotary compressors have been developed because of their compactness and excellent vibration characteristics.

The rotary compressor is configured such that the motor portion and the compression mechanism portion are mounted on the drive shaft in a sealed container. A roller located around the eccentric portion of the drive shaft is positioned in a cylinder forming a cylindrical compression space, and at least one vane It extends between the compression spaces and partitions the compression space into the suction zone and the compression zone, and the roller is located eccentrically in the compression space. In general, the vane is supported by a spring in the groove portion of the cylinder to pressurize the surface of the roller, and by this vane, the compression space is divided into a suction zone and a compression zone as described above. As the suction shaft gradually grows as the drive shaft rotates, the suction zone or the working fluid is sucked into the suction zone, and the compression zone gradually decreases, thereby compressing the refrigerant or the working fluid therein.

In the conventional rotary compressor, since the motor part and the compression mechanism part are stacked up and down, the height of the compressor is inevitably increased as a whole. In addition, in the conventional rotary compressor, since the weight of the motor portion and the compression mechanism portion are different from each other, not only a difference in inertia force is generated but also an unbalance inevitably occurs on the upper and lower sides of the driving shaft. Therefore, in order to compensate for the imbalance of the motor portion and the compression mechanism portion, the weight member can be added to the relatively small weight, but this causes a result of applying an additional load to the rotating body, which causes a problem of lowering driving efficiency and compression efficiency. . In addition, in the conventional rotary compressor, since the eccentric portion is formed in the drive shaft at the compression mechanism, as the drive shaft rotates, the eccentric portion is rotated together to drive the roller outside the eccentric portion. There is a problem that the vibration inevitably occurs. In addition, in the conventional rotary compressor, the eccentric portion of the drive shaft rotates to continuously slide contact with the inner surface of the stationary cylinder on which the roller is fixed, and also continuously slides with the end surface of the vane on which the roller is fixed. Because of the contact, friction losses occur due to the presence of high relative speeds between these slidingly contacting components, which leads to a decrease in the efficiency of the compressor, and furthermore the possibility of refrigerant leakage at the contact surface between the sliding contacting vanes and rollers. The mechanical reliability is also lowered.

Conventional rotary compressors have a configuration in which a drive shaft rotates inside a fixed cylinder, whereas in Japanese Patent Laid-Open Nos. 62-284985 and 64-100291, a shaft having a suction port in the axial direction and larger than the shaft is provided. A fixed shaft integrally formed with a piston part eccentric in diameter and having a port communicating with the suction port of the shaft in a radial direction; Vanes installed in a rotatable manner; A rotor rotatable with the vane received; An upper bearing having a discharge port; Lower bearing; A permanent magnet having a height larger than the difference between the outer diameter and the inner diameter and fixed to the lower bearing; Coils that do not rotate on the outer periphery of the permanent magnet; including, but by rotating the upper bearing and the rotor and the lower bearing in order to rotate, the vane surrounds the space between the rotor, the upper bearing and the lower bearing and the piston portion volume This changing rotary compressor is disclosed.

In the rotary compressor disclosed in the Japanese Laid-Open Patent Publication, since the permanent magnet in the shape of a hollow cylinder is located inside the stator, and the rotor and the compression mechanism part including the vane are located inside the permanent magnet, the motor part and the compression mechanism part of the conventional rotary compressor are high. It is considered that the problem caused by the installation in the direction can be solved.

However, the rotary compressor disclosed in the Japanese Laid-Open Patent Publication is conventionally provided between the vane and the eccentric portion (piston portion) because the vane is in sliding contact with the outer surface of the eccentric portion (piston portion) which is fixed and supported at the same time by the rotating rotor. As with the rotary compressor, there is a problem that a high relative speed difference exists, not only causes friction loss but also a possibility of refrigerant leakage at the contact surface between the sliding contact vane and the eccentric part. In addition, the rotary compressor disclosed in the Japanese Patent Laid-Open Publications is practically applicable because it does not disclose any possible configuration for the suction and discharge flow paths of the working fluid, the lubricating oil in the compression mechanism part, and the mounting of the bearing member. There is not enough.

Alternatively, US Patent Publication No. 7,217,110 discloses a rotary compressor in which a fixed shaft and an eccentric part are integrally formed, and a compression space is formed between the outer surface of the roller rotatably positioned in the eccentric and the inner surface of the rotating rotor. . Here, the rotational force of the rotor has a configuration that is transmitted to the roller through the vane fixed to the upper and lower plates of the rotor that rotates integrally with the rotor, by using the pressure difference in the sealed container and the pressure difference in the compression space, the center of the fixed shaft The working fluid and the lubricating oil are introduced into the compression space through the formed longitudinal flow path.

Therefore, since the rotary compressor disclosed in the US Patent Publication also forms a compression mechanism inside the rotor, it is considered that the problems caused by the motor portion and the compression mechanism portion installed in the height direction in the conventional rotary compressor can be solved. In addition, unlike the above-described Japanese Patent Laid-Open Publications, since the rotor, vanes and rollers all rotate integrally, there is no difference in relative speed between them, and there is no fear of friction loss due to them.

However, the rotary compressor disclosed in the U.S. Patent Publication discloses that one end of the fixed shaft is fixed to the hermetically sealed container, but the other end of the fixed shaft is manufactured to be suspended in the sealed container in a state in which the other end of the fixed shaft is separated from the hermetically sealed container. It is difficult to center, very vulnerable to lateral vibrations due to the inevitable eccentric rotation due to the nature of the rotary compressor, the actual production is quite difficult, or assembly productivity is poor. In addition, since the vanes protrude inwardly from the rotor and the vane grooves are formed in the rollers to guide the movement trajectory of the vanes, the rollers inevitably become large in order to form the vane grooves. There is a problem that results in the excitation of the lateral vibration by the eccentric rotation. Also disclosed is a configuration that does not use lubricating oil, but for this purpose, there is a problem in that components must be made of a very expensive material. In the case of using a lubricating oil, the lubricating oil is used by using a pressure difference in a sealed container and a compression space. Since it is configured to circulate with the working fluid by pulling up into the compression space, in this case, inevitably a large amount of lubricating oil is incorporated into the working fluid, and there is a problem in that the lubrication performance can be lowered because the compressor can exit the compressor together with the working fluid.

The present invention has been made to solve the above problems of the prior art, an object of the present invention is to provide a compressor that can be easily assembled to center the parts in the sealed container to increase the structural safety.

In addition, the present invention is not only to reduce the lateral vibration due to the eccentric rotation, but also to increase the efficiency, it is an object of the present invention to provide a compressor that is easy to manufacture and assembly.

In addition, an object of the present invention is to provide a compressor that can lower the height of the product and at the same time can effectively achieve the suction and discharge of the refrigerant.

Another object of the present invention is to provide a compressor capable of reducing noise generated by suction and discharge of a refrigerant.

Compressor according to the present invention for solving the above problems is a sealed container in which the refrigerant is sucked and discharged; A stator fixed in a sealed container; A fixing member whose upper and lower ends are installed in a sealed container so that the fixed shaft does not move; A rotating member located between the stator and the holding member and rotating by the rotating electromagnetic field from the stator; Upper and lower bearing covers forming upper and lower portions of the rotating member to rotate together with the rotating member to rotatably support the rotating member to the fixed member and to form a compression space inside the rotating member; A suction port formed in one of the upper and lower bearing covers to suck the refrigerant into the compression space; And, the discharge port is formed in one of the upper and lower bearing cover to discharge the compressed refrigerant in the compression space; characterized in that it comprises a.

In addition, in the present invention, the fixing member includes an eccentric portion which is eccentric from the center of the shaft of the fixed shaft, the rotating member is a cylindrical rotor and a cylindrical rotor to receive the rotational force of the cylindrical rotor rotated by the rotating electromagnetic field from the stator The roller which rotates together to form a compression space between the cylindrical rotor, transfers the rotational force from the cylindrical rotor to the roller, and divides the compression space into a suction pocket where the refrigerant is sucked in and a compression pocket where the refrigerant is compressed and discharged. It includes, the rotation axis of the cylindrical rotor is coincident with the axis center of the fixed shaft, the rotation axis of the roller is characterized in that it coincides with the axis center of the eccentric portion.

In addition, in the present invention, the cylindrical rotor and the roller are rotated together, the position facing each other is characterized in that it is repeated to move away.

In addition, in the present invention, the suction port is formed to communicate with the suction pocket, the discharge port is characterized in that it is formed to communicate with the compression pocket.

In addition, in the present invention, the inlet port is characterized in that it comprises a refrigerant suction passage that communicates with the inner space of the sealed container, the low pressure refrigerant in the inner space can be sucked into the compressed space through the inlet.

In addition, in the present invention, at least a part of the fixed shaft is formed into a hollow shaft to communicate with the outside of the sealed container, the compressed refrigerant discharged through the discharge port is separated from the sealed container through the hollow space of the fixed shaft while keeping the compressed refrigerant discharged from the inner space of the sealed container. Characterized in that it further comprises a refrigerant discharge passage that can be discharged to.

In addition, in the present invention, a muffler is rotatably supported about a fixed shaft in the bearing cover in which the discharge port is formed so as to form a discharge chamber for the noise space of the compressed refrigerant discharged through the discharge port, and the refrigerant discharge passage is a compressed refrigerant. And a discharge guide passage for guiding the discharge chamber to the hollow space of the fixed shaft.

Further, in the present invention, the discharge port is formed in the upper bearing cover, the discharge guide flow path, the first discharge guide flow passage penetrating the shaft portion of the upper bearing cover surrounding the fixed shaft upper portion, the upper bearing so as to communicate with the first discharge guide flow path And a second discharge guide passage formed in a ring shape between the inner circumferential surface of the shaft and the upper outer peripheral surface of the fixed shaft, and a third discharge guide passage formed to communicate the hollow space above the second discharge guide passage and the fixed shaft. do.

In the present invention, the discharge chamber is characterized in that the discharge valve for opening and closing the discharge port is provided.

Further, in the present invention, the suction port and the discharge port are formed in the upper bearing cover, the low-pressure refrigerant is in the compression space through the suction port formed in the muffler, the suction chamber formed between the muffler and the upper bearing cover, and the suction port of the upper bearing cover The compressed refrigerant is discharged from the upper bearing cover, the discharge chamber formed between the muffler and the upper bearing cover and separated from the suction chamber, and the first discharge guide penetrating the shaft portion of the upper bearing cover surrounding the fixed shaft. A second discharge guide flow path formed in a ring shape between the inner peripheral surface of the shaft portion of the upper bearing cover and the upper outer peripheral surface of the fixed shaft so as to communicate with the flow path, the first discharge guide flow passage, and the hollow space above the second discharge guide flow path and the fixed shaft It is guided to the hollow space of the fixed shaft through the third discharge guide flow path formed so as to be discharged to the outside of the sealed container.

In addition, in the present invention, the discharge port is in communication with the inner space of the sealed container is characterized in that the compressed refrigerant can be discharged into the inner space of the sealed container through the discharge port.

In addition, in the present invention, at least a portion of the fixed shaft is formed in the hollow shaft to communicate with the outside of the sealed container, and can be sucked through the hollow space of the fixed shaft while separating the low-pressure refrigerant from the sealed container from the inner space of the sealed container. It further comprises a refrigerant suction passage.

In addition, in the present invention, the suction cover is formed in the bearing cover, the muffler is coupled in the axial direction rotatably supported about the fixed shaft to form a suction chamber for the low pressure refrigerant sucked through the hollow space of the fixed shaft, the refrigerant suction The flow path further includes a suction guide flow path for guiding the low pressure refrigerant from the hollow space of the fixed shaft to the suction chamber.

In addition, in the present invention, the suction port is formed in the upper bearing cover, the suction guide flow path, the first suction guide flow path formed to communicate with the hollow space above the fixed shaft, the shaft portion of the upper bearing cover to communicate with the first suction guide flow path A second suction guide flow passage formed in a ring shape between the inner circumferential surface and the upper outer peripheral surface of the fixed shaft, and a third discharge guide flow passage penetrating the shaft portion of the upper bearing cover surrounding the fixed shaft upper portion so as to communicate with the second suction guide flow passage. It is done.

In the present invention, it is characterized in that the discharge valve for opening and closing the discharge port is provided.

In addition, in the present invention, the suction port and the discharge port is formed in the upper bearing cover, the low pressure refrigerant, the first suction guide flow passage formed to communicate with the hollow space of the fixed shaft and the hollow space above the fixed shaft from the outside of the sealed container, A second suction guide flow path formed in a ring shape between the inner peripheral surface of the shaft portion of the upper bearing cover and the upper outer peripheral surface of the fixed shaft to communicate with the suction guide flow passage, and the shaft portion of the upper bearing cover surrounding the upper portion of the fixed shaft to communicate with the second suction guide flow passage. The suction port is formed between the third discharge guide flow passage, the suction chamber formed between the muffler and the upper bearing cover and is separated from the discharge chamber, and the suction port of the upper bearing cover, and the compressed refrigerant is discharged from the discharge hole of the upper bearing cover. , Through the discharge chamber for the noise space of the compressed refrigerant formed between the muffler and the upper bearing cover, and the discharge opening formed in the muffler Characterized in that the discharge to the inner space of the container.

Compressor according to the present invention constituted as described above is assembled to suspend the rotating member to the fixing member, and then the upper and lower ends are fixed to the sealed container so that the fixed shaft of the fixing member does not move. There is an advantage that can increase the structural safety and assembly.

In addition, the compressor according to the present invention, even if the eccentric portion is eccentric from the axial center of the fixed shaft and protrudes in all the radial directions of the fixed shaft to remain stationary, while the cylindrical rotor rotates about the fixed shaft and the roller rotates about the eccentric portion Therefore, since the cylindrical rotor and the roller rotate about each axis, eccentric rotation does not occur. As a result, the balance weight is adopted to reduce the lateral vibration caused by the eccentric rotation and to reduce the vibration caused by the eccentric rotation. Since it can be omitted, the efficiency can be increased, and the actual production assembly is easy.

In addition, even if the compressor according to the present invention is installed so that the rotating member is suspended on the outer peripheral surface of the fixing member is formed in the inlet and discharge holes in the bearing cover coupled in the axial direction of the rotating member, the height of the compressor as the rotating member is provided on the outer peripheral member Even if the configuration is low, there is an advantage that the effective suction and discharge of the refrigerant is made.

In addition, the compressor according to the present invention, the suction chamber and the discharge chamber is formed between the bearing cover and the muffler coupled in the axial direction in the rotating member, passing through the suction chamber before being sucked into the compression space, the refrigerant discharged in the compression space is discharged Since passing through the chamber has the advantage of reducing the flow noise of the refrigerant and the opening and closing noise of the valve.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 is a side cross-sectional perspective view, an exploded perspective view and a side cross-sectional view showing an example of a compressor according to the present invention.

One example of the compressor according to the present invention is a stator by the sealed container 110, the stator 120 fixed in the sealed container 110, and a rotating electromagnetic field from the stator 120 as shown in FIGS. (120) Rotating member 130 is rotatably installed in the inside and the rotating member 130 and the rotating member 130 is installed so as to hang on the outer circumferential surface at the same time the upper and lower ends of the fixed shaft 141 does not move in the sealed container 110. It includes a fixing member 140 fixed so as not to. At this time, the electric mechanism for providing power through the electrical action comprises a rotor 131 of the rotating member 130, including the stator 120, the compressor mechanism for compressing the refrigerant through the mechanical action rotating member 130 It includes a fixing member 140, including. Therefore, by installing the transmission mechanism and the compression mechanism in the radial direction, the overall compressor height can be lowered.

The airtight container 110 has a cylindrical body part 111, upper and lower shells 112 and 113 coupled to the upper and lower parts of the body part 111, and a lower shell to fasten and fix the airtight container 110 to another product. 113 is made of a mounting portion 114 provided in the radial direction on the bottom surface, the oil lubricating the rotating member 130 and the fixing member 140 may be stored up to an appropriate height therein. A predetermined position of the upper shell 112 is provided with a suction tube 115 through which the refrigerant can be sucked, and a fixed tube 141 is directly provided as an example of a discharge tube (not shown) through which the refrigerant is discharged at the center of the upper shell 112. Is provided so as to be exposed, it is determined to be high pressure or low pressure depending on whether the inside of the sealed container 110 is filled with a compressed refrigerant or the refrigerant before being compressed, the suction tube and the discharge tube may be changed accordingly. In the embodiment of the present invention is configured as a low pressure, the fixed shaft 141, which is a discharge pipe is provided to protrude to the outside of the sealed container (110). However, the fixed shaft 141 does not need to protrude excessively outside the sealed container 110, it is preferable to install a suitable fixed structure outside the sealed container 110 to connect to the external refrigerant pipe. In addition, the upper shell 112 is provided with a terminal 116 for supplying power to the stator 120.

The stator 120 is composed of a core and a coil wound around the core, and fixed to the inside of the body portion 111 of the sealed container 110 by shrinkage. The core employed in the existing BLDC motor has nine slots along the circumference, whereas in the preferred embodiment of the present invention, the diameter of the stator 120 is relatively large so that the core of the BLDC motor has twelve slots along the circumference. It is composed. As the number of slots of the core increases, the number of turns of the coil increases, so that the height of the core may be lowered in order to generate the electromagnetic force of the stator 120 as in the prior art.

The rotating member 130 includes the cylindrical rotors 131 and 132, the roller 133, the vanes 134, the bush 135, the upper bearing cover 136 and the muffler 137, and the lower bearing cover 138. ) The cylindrical rotors 131 and 132 are provided with a plurality of permanent magnets in the axial direction so as to be rotated by the rotating electromagnetic field from the stator 120, and are located inside the rotor 131 to rotate integrally with the rotor 131. While it is made of a cylinder 132 having a compression space therein, the rotor 131 and the cylinder 132 may be separately configured and molded, but integrally formed in the form of a powder sintered body or a laminate in which iron pieces are laminated. May be The roller 133 is cylindrically mounted on the outer circumferential surface of the eccentric portion 142 of the fixing member 140 to be described below, and for this purpose, a lubrication structure is applied between the roller 133 and the eccentric portion 142. It is preferable. The vane 134 is integrally provided on the outer circumferential surface of the roller 133 so as to be radially expanded, and is installed to fit into the vane mounting holes 132H provided on the cylindrical rotors 131 and 132 or the inner circumferential surface of the cylinder 132. The bush 135 is installed to support both end surfaces of the vanes 134 fitted into the vane mounting holes 132H of the cylindrical rotors 131 and 132. Of course, a lubrication structure is applied to allow the vane 134 to move smoothly between the vane mounting holes 132H and the bush 135 of the cylindrical rotors 131 and 132.

The upper bearing cover 136 and the muffler 137 and the lower bearing cover 138 are coupled to the cylindrical rotors 131 and 132 in the axial direction, between the cylindrical rotors 131 and 132 and the rollers 133 and vanes 134. The compression space is formed and installed in contact with the journal bearing or the thrust bearing at a portion in contact with the fixing member 140. The upper surface of the upper bearing cover 136 is formed so that the suction chamber 136a and the discharge chamber 136b are partitioned in the space between the muffler 137 and the suction chamber 136a is the upper bearing cover 136 and the muffler ( The discharge port 136b communicates with an intake port (137a) provided at each of the upper and lower bearing covers 136a, and the shaft portion protrudes upward from the center of the upper bearing cover 136. In communication with the discharge guide passage (not shown) provided in. Of course, the suction port and the discharge port provided in the upper bearing cover 137 may be provided with a suction valve or a discharge valve, and the suction and discharge ports provided in the upper bearing cover 137 may be divided by vanes 134. It is preferable to be provided at both sides of the phosphorus 134. The upper bearing cover 136 and the muffler 137 are coupled to the upper surfaces of the cylindrical rotors 131 and 132, and the lower bearing cover 137 is coupled to the lower surfaces of the cylindrical rotors 131 and 132, and to the cylindrical rotors 131 and 132. It is fastened at the same time by a fastening member such as a kind of long bolt.

The fixed member 140 has a fixed shaft 141 provided in a cylindrical shape and a fixed shaft 141 in all radial directions of the fixed shaft 141 to have a cylindrical shape having a larger diameter than the cylinder of the fixed shaft 141. And an eccentric portion 142 eccentrically formed on the fixed shaft 141 at the same time. An oil supply passage 141A is formed below the fixed shaft 141 to supply oil stored in the airtight container 110, while a high pressure refrigerant is discharged to the upper portion of the fixed shaft 141. As the flow path 141B is formed, and the oil supply passage 141A and the refrigerant discharge passage 141B are formed to be isolated, oil can be prevented from escaping together with the refrigerant. The eccentric portion 142 is formed to extend in all radial directions of the fixed shaft 141, because the upper and lower surfaces of the eccentric portion 142 abuts the upper and lower bearing cover (136,138) acting as a trust surface It is preferable that a supply passage for lubricating oil is formed on the upper and lower surfaces of the eccentric portion 142. It is preferable that a supply flow path of the lubricating oil extended to the outer circumferential surface is formed.

In addition, upper and lower bearings 150 and 160 are provided to fix the fixed shaft 141 to the sealed container 110. The upper bearing 150 is fixed to the upper shell 112 of the sealed container 110 by the upper portion of the fixed shaft 141, and then welded, while the lower bearing 160 is the lower portion of the fixed shaft 141 After the fitting, it is fixed to the body portion 111 side of the sealed container 110 by shrinkage or three-point welding and the like. The upper bearing 150 is formed radially smaller than the lower bearing 160 to prevent interference with the suction pipe 115 or the terminal 116 provided in the upper shell 112. These upper and lower bearings 150 and 160 are manufactured by press working, but roller 133 and vanes 134, bush 135, upper and lower bearing covers 136 and 138, fixed shaft 141 and eccentric 142 ) Are all cast by cast iron and then manufactured by grinding and further machining.

4 is a plan view showing the vane mounting structure of the compressor according to the present invention, Figure 5 is a plan view showing the operation cycle of the compression mechanism in the compressor according to the present invention.

Looking at the mounting structure of the vane 134 with reference to Figure 4, the inner circumferential surface of the cylindrical rotor (131, 132) is formed in the radially long and is provided with a vane mounting hole 132H penetrated in the axial direction, the vane mounting hole ( After the pair of bushes 135 are inserted into the 132H, the vanes 134 integrally provided on the outer circumferential surface of the roller 133 are fitted between the bushes 135. In this case, a compression space is provided between the cylindrical rotors 131 and 132 and the roller 133, and the compression space is divided into the suction pocket S and the compression pocket D by the vanes 134. The suction port and the suction chamber 136a (shown in FIG. 2) of the upper bearing cover 136 (shown in FIG. 2) described above are located in communication with the suction pocket S, and the upper bearing cover 136 (shown in FIG. 2) The discharge port and the discharge chamber 136b (shown in FIG. 2) are positioned to communicate with the compression pocket D, but are preferably located close to the vane 134 to reduce the dead volume. As such, in the compressor of the present invention, the vane 134 integrally manufactured with the roller 133 is slidably assembled between the bushes 135 so that the vane manufactured separately from the roller or the cylinder in the conventional rotary compressor is slidably movable. The friction loss caused by the sliding contact generated by the spring can be eliminated, and refrigerant leakage can be reduced between the suction pocket S and the compression pocket D. FIG.

Therefore, when the cylindrical rotors 131 and 132 receive a rotational force by the rotating magnetic field with the stator 120 (shown in Fig. 1), the cylindrical rotors 131 and 132 rotate. While the vane 134 is fitted to the vane mounting holes 132H of the cylindrical rotors 131 and 132, the rotational force of the cylindrical rotors 131 and 132 is transmitted to the roller 133, and the vanes 134 according to the rotation of both vanes 134. ) Is a reciprocating linear motion between the bush (135). That is, the inner circumferential surfaces of the cylindrical rotors 131 and 132 have portions corresponding to each other on the outer circumferential surfaces of the rollers 133. The portions corresponding to each other are each of the cylindrical rotors 131 and 132 and the roller 133 rotates once. As the suction pocket (S) gradually grows while repeating contact with each other, the suction pocket (S) gradually grows, while the refrigerant or working fluid is sucked into the suction pocket (S), and the compression pocket (D) gradually decreases. It is compressed and then discharged.

Referring to the process of suction, compression, and discharge of the compression mechanism, as shown in FIG. 5, the cylindrical rotors 131, 132 and the roller 133 rotate to (a), (b), (c), and (d). This shows one cycle where the relative position changes. In more detail, when the cylindrical rotors 131 and 132 and the roller 133 are positioned at (a), the refrigerant or the working fluid is sucked into the suction pocket S, and the suction rotor S and the vane 134 are partitioned. Compression occurs in the compressed pocket D discharged. Even when the cylindrical rotor 131 and 132 and the roller 133 arrive at (b) while rotating, the suction pocket S increases and the compression pocket D decreases, so that the refrigerant or the working fluid is sucked into the suction pocket S. In this case, compression continues to occur in the compression pocket (D). When the cylindrical rotors 131 and 132 and the roller 133 reach (c) while rotating, they are continuously sucked into the suction pocket S, and the pressure of the refrigerant or the working fluid in the compression pocket D becomes higher than the set pressure. The refrigerant or the working fluid is discharged through the discharge port and the discharge valve of the upper bearing cover 136 (shown in FIG. 2). In (d), suction and discharge of the refrigerant or working fluid are almost finished.

6 is a side sectional view showing a refrigerant flow in the low pressure compressor according to the present invention.

Looking at an example of the low-pressure compressor according to the present invention with reference to Figure 6, the suction container 110 (shown in Figure 1) is provided with a refrigerant in the upper portion of the sealed container (110: shown in Figure 1), the sealed container A coolant discharge passage 141B through which the coolant can be discharged is provided in the hollow space above the fixed shaft 141 fixed to (110: shown in FIG. 1).

For suction of the refrigerant, a suction port 137a is provided in the muffler 137 so as to communicate with the suction chamber 136a of the upper bearing cover 136, and the suction chamber 136a of the upper bearing cover 136 and the compression space An inlet 136c is provided in the upper bearing cover 136 to communicate the suction pocket S (shown in FIG. 4). At this time, the inlet 136c of the upper bearing cover 136 is preferably located close to one side of the vane 134 (shown in Figure 4). Therefore, the low pressure refrigerant is filled in the sealed container 110 (shown in FIG. 1) through the suction pipe 115 (shown in FIG. 1) of the sealed container 110 (shown in FIG. 1), and then the suction port (of the muffler 137). 137a), the suction chamber 136a of the upper bearing cover 136, and the suction port 136c of the upper bearing cover 136 flow into the suction pocket S (shown in FIG. 4) of the compression space.

For discharge of the refrigerant, the discharge port 136d and the discharge valve in the upper bearing cover 136 to communicate the compression pocket (D: shown in Fig. 4) of the compression space and the discharge chamber 136b of the upper bearing cover 136 (Not shown) is provided between the upper bearing cover 136 and the fixed shaft 141 to communicate the discharge chamber 136b of the upper bearing cover 136 and the refrigerant discharge passage 141B of the fixed shaft 141. Discharge guide flow paths A, B, and C are provided. At this time, the discharge port 136d of the upper bearing cover 136 is preferably located close to the other side of the vane 134 (shown in FIG. 4) as opposed to the inlet 136c of the upper bearing cover 136 in order to reduce the dead volume. Do. In addition, the discharge guide flow paths (A, B, C) are the first discharge guide flow path (A) and the first discharge guide flow path (A) penetrated to the shaft portion of the upper bearing cover 136 surrounding the upper portion of the fixed shaft (141) A second discharge guide flow path B formed in a ring shape between the inner peripheral surface of the shaft portion of the upper bearing cover 136 and the upper outer peripheral surface of the fixed shaft 141, and the second discharge guide flow path B and the fixed shaft 141. The third discharge guide flow path (C) formed in the radial direction on the fixed shaft 141 to communicate with the refrigerant discharge flow path (141B) of the first discharge guide flow path (A) of the upper bearing cover (136) It is formed to be inclined downward toward the center because it is manufactured by drilling the shaft portion. Therefore, the high-pressure refrigerant exits through the discharge port 136d of the upper bearing cover 136 from the compression pocket (D: shown in FIG. 4) of the compression space, and then discharge chamber 136b of the upper bearing cover 136, The discharge vessel flow paths A, B, and C between the upper bearing cover 136 and the fixed shaft 141 and the refrigerant discharge path 141B of the fixed shaft 141 are external to the sealed container 110 (shown in FIG. 1). Exit to At this time, the flow noise of the high pressure refrigerant and the opening and closing noise of the discharge valve are reduced in the discharge chamber 136b between the upper bearing cover 136 and the muffler 137.

7 is a side sectional view showing a refrigerant flow in the high pressure compressor according to the present invention.

Looking at an example of the high-pressure compressor according to the present invention with reference to Figure 6, the refrigerant suction flow path through which the refrigerant can be sucked in the hollow space above the fixed shaft (141) fixed to the sealed container (110: shown in Figure 1) 141B is provided, and a discharge tube 115 (shown in FIG. 1) through which the refrigerant can be sucked is provided on the sealed container 110 (shown in FIG. 1).

For suction of the refrigerant, the suction between the upper bearing cover 136 and the fixed shaft 141 communicates with the refrigerant suction passage 141B of the fixed shaft 141 and the suction chamber 136a of the upper bearing cover 136. Guide passages a, b, and c are provided, and the upper bearing cover 136 communicates the suction chamber 136a of the upper bearing cover 136 with the compression pocket D of the compression space (shown in FIG. 4). Inlet port 136c is provided. At this time, the suction guide flow path (a, b, c) and the first suction guide flow path (a) formed in the radial direction on the fixed shaft 141 to communicate with the refrigerant suction flow path (141B) of the fixed shaft 141, A second suction guide flow path (b) and a second suction guide flow path (b) formed in a ring shape between the inner peripheral surface of the shaft portion of the upper bearing cover 136 and the upper outer peripheral surface of the fixed shaft 141 so as to communicate with the first suction guide flow path (a). ) And a third suction guide flow path (c) passing through the shaft portion of the upper bearing cover 136 surrounding the upper part of the fixed shaft 141 to communicate with the suction chamber 136a of the upper bearing cover 136. The discharge guide flow path c is formed to be inclined downward toward the center because it is manufactured by drilling the shaft portion of the upper bearing cover 136. In addition, the inlet 136c of the upper bearing cover 136 is preferably located close to one side of the vane 134 (shown in FIG. 4). Therefore, the low pressure refrigerant flows into the refrigerant suction passage 141B of the fixed shaft 141, and then the suction guide passages a, b, and c between the upper bearing cover 136 and the fixed shaft 141 and the upper bearing. The suction chamber 136a of the cover 136 and the suction port 136c of the upper bearing cover 136 flow into the suction pocket S (shown in FIG. 4) of the compression space.

In order to discharge the refrigerant, the discharge port 136d and the discharge valve of the upper bearing cover 136 communicate with the discharge pocket D of the compressed space (shown in FIG. 4) and the discharge chamber 136b of the upper bearing cover 136. The discharge hole 137a is provided in the muffler 137 so as to communicate with the discharge chamber 136b of the upper bearing cover 136. At this time, the discharge port 136d of the upper bearing cover 136 is preferably located close to the other side of the vane 134 (shown in FIG. 4) as opposed to the inlet 136c of the upper bearing cover 136 in order to reduce the dead volume. Do. Therefore, the high-pressure refrigerant is discharged from the discharge pocket (D: shown in Fig. 4) of the compressed space, the discharge port 136d of the upper bearing cover 136, the discharge chamber 136b of the upper bearing cover 136, the muffler 137 After filling the sealed container 110 (shown in FIG. 1) through the discharge port 137a, the sealed container 110 (see FIG. 1) through the discharge tube 115 (shown in FIG. 1) of the sealed container 110 (shown in FIG. 1). Exit on the outside). At this time, the flow noise of the high pressure refrigerant and the opening and closing noise of the discharge valve are reduced in the discharge chamber 136b between the upper bearing cover 136 and the muffler 137.

In the above, the present invention has been described in detail by way of examples based on the embodiments of the present invention and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the contents described in the claims below.

1 is a side cross-sectional perspective view showing an example of a compressor according to the present invention.

2 is an exploded perspective view showing an example of a compressor according to the present invention.

Figure 3 is a side sectional view showing an example of a compressor according to the present invention.

Figure 4 is a plan view showing the vane mounting structure of the compressor according to the present invention.

5 is a plan view showing the operation cycle of the compression mechanism in the compressor according to the present invention.

Figure 6 is a side sectional view showing a refrigerant flow in the low pressure compressor according to the present invention.

Figure 7 is a side sectional view showing a refrigerant flow in the high pressure compressor according to the present invention.

<Explanation of symbols on main parts of the drawings>

110: sealed container 120: stator

130: rotating member 131: rotor

132: cylinder 133: roller

134: vane 135: bush

136: upper bearing cover 137: muffler

138: lower bearing cover 140: fixing member

141: fixed shaft 142: eccentric portion

Claims (16)

An airtight container through which the refrigerant is sucked and discharged; A stator fixed in a sealed container; A fixing member whose upper and lower ends are installed in a sealed container so that the fixed shaft does not move; A rotating member located between the stator and the holding member and rotating by the rotating electromagnetic field from the stator; Upper and lower bearing covers forming upper and lower portions of the rotating member to rotate together with the rotating member to rotatably support the rotating member to the fixed member and to form a compression space inside the rotating member; A suction port formed in one of the upper and lower bearing covers to suck the refrigerant into the compression space; And, And a discharge port formed in one of the upper and lower bearing covers to discharge the compressed refrigerant in the compression space. The method of claim 1, The fixed member includes an eccentric portion eccentric from the center of the shaft of the fixed shaft, The rotating member receives a cylindrical rotor that is rotated by a rotating electromagnetic field from the stator, a roller that rotates with the cylindrical rotor while receiving the rotational force of the cylindrical rotor, and forms a compression space between the cylindrical rotor and the roller from the cylindrical rotor. It includes a vane for transmitting the rotational force and partitioning the compressed space into a suction pocket for the refrigerant is sucked in and a compression pocket for the refrigerant is compressed and discharged, And a rotation axis of the cylindrical rotor coincides with the axis center of the fixed shaft, and the rotation axis of the roller coincides with the axis center of the eccentric portion. The method of claim 2, And the cylindrical rotor and the roller rotate together, and the positions facing each other become closer and further away from each other. The method of claim 2, The suction port is formed so as to communicate with the suction pocket, the discharge port is configured to communicate with the compression pocket. The method according to any one of claims 1 to 4, And a suction port includes a refrigerant suction passage through which the low pressure refrigerant in the internal space may be sucked into the compression space through the suction port in communication with the internal space of the sealed container. The method of claim 5, At least a part of the fixed shaft is formed of a hollow shaft to communicate with the outside of the sealed container, And a refrigerant discharge passage for discharging the compressed refrigerant discharged through the discharge port to the outside of the sealed container through the hollow space of the fixed shaft while isolating the internal space of the sealed container. The method of claim 6, In the bearing cover in which the discharge port is formed, the muffler is rotatably supported about the fixed shaft to form a discharge chamber for the noise space of the compressed refrigerant discharged through the discharge hole, And the refrigerant discharge passage further comprises a discharge guide passage for guiding the compressed refrigerant from the discharge chamber to the hollow space of the fixed shaft. The method of claim 7, wherein The discharge port is formed in the upper bearing cover, The discharge guide flow passage is formed in a ring shape between the first discharge guide flow passage penetrating the shaft portion of the upper bearing cover surrounding the upper portion of the fixed shaft and the inner peripheral surface of the shaft portion of the upper bearing cover and the upper outer peripheral surface of the fixed shaft so as to communicate with the first discharge guide flow passage. And a third discharge guide passage configured to communicate the second discharge guide passage and the second discharge guide passage and the hollow space above the fixed shaft. The method of claim 7, wherein Compressor, characterized in that the discharge chamber is provided with a discharge valve for opening and closing the discharge port. The method of claim 7, wherein Inlet and outlet are formed in the upper bearing cover, The low pressure refrigerant is sucked into the compression space through the suction port formed in the muffler, the suction chamber formed between the muffler and the upper bearing cover, and the suction port of the upper bearing cover, The compressed refrigerant includes a discharge port of the upper bearing cover, a discharge chamber formed between the muffler and the upper bearing cover, the discharge chamber separated from the suction chamber, and a first discharge guide flow passage penetrating the shaft portion of the upper bearing cover surrounding the fixed shaft. A third discharge guide flow passage formed in a ring shape between the inner peripheral surface of the shaft portion of the upper bearing cover and the upper outer peripheral surface of the fixed shaft so as to communicate with the discharge guide passage, and the third discharge passage and the hollow space above the fixed shaft upper portion Compressor characterized in that discharged to the outside of the sealed container is guided to the hollow space of the fixed shaft through the discharge guide passage. The method according to any one of claims 1 to 4, The discharge port is in communication with the inner space of the sealed container, the compressed refrigerant can be discharged into the inner space of the sealed container through the discharge port. The method of claim 11, At least a part of the fixed shaft is formed of a hollow shaft to communicate with the outside of the sealed container, And a refrigerant suction passage that allows suction of the low pressure refrigerant from the outside of the hermetic container through the hollow space of the fixed shaft while isolating the inner space of the hermetic container. The method of claim 12, In the bearing cover in which the suction port is formed, a muffler is coupled in the axial direction to be rotatably supported about the fixed shaft so as to form a suction chamber for the low pressure refrigerant sucked through the hollow space of the fixed shaft, And a refrigerant guide passage for guiding the low pressure refrigerant from the hollow space of the fixed shaft to the suction chamber. The method of claim 13, Inlet is formed in the upper bearing cover, The suction guide flow passage includes a first suction guide flow passage formed to communicate with the hollow space above the fixed shaft, and a second suction formed in a ring shape between the inner peripheral surface of the shaft portion of the upper bearing cover and the upper peripheral surface of the fixed shaft so as to communicate with the first suction guide flow passage. And a third discharge guide passage penetrating the shaft portion of the upper bearing cover surrounding the fixed shaft upper portion so as to communicate with the guide passage and the second suction guide passage. The method of claim 11, Compressor, characterized in that the discharge valve for opening and closing the discharge port is provided. The method of claim 13, Inlet and outlet are formed in the upper bearing cover, The low pressure refrigerant has a first suction guide channel formed to communicate with the hollow space of the fixed shaft and the hollow space above the fixed shaft from the outside of the sealed container, and the inner circumferential surface of the upper bearing cover and the fixed shaft upper part to communicate with the first suction guide channel. A second suction guide flow passage formed in a ring shape between the outer circumferential surface, a third discharge guide flow passage penetrating the shaft portion of the upper bearing cover surrounding the fixed shaft upper portion to communicate with the second suction guide flow passage, and between the muffler and the upper bearing cover It is sucked into the compression space through the suction chamber and the suction chamber is separated from the discharge chamber, the upper bearing cover, The compressed refrigerant is discharged to the internal space of the sealed container through the discharge port of the upper bearing cover, the discharge chamber for the noise space of the compressed refrigerant formed between the muffler and the upper bearing cover, and the discharge hole formed in the muffler. .

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