Rotary compressor
阅读说明:本技术 旋转式压缩机 (Rotary compressor ) 是由 曹国铉 史范东 于 2018-04-30 设计创作,主要内容包括:本发明涉及旋转式压缩室,包括:驱动马达和旋转轴,所述驱动马达设置于壳体的内部,所述旋转轴结合于所述驱动马达而传递旋转力;第一缸筒和第二缸筒,在开口的圆形的中心部形成有压缩空间;第一辊子和第二辊子,在所述压缩空间回旋;第一叶片和第二叶片,将各个所述缸筒的压缩空间划分为吸入室和压缩室;主轴承和副轴承,所述主轴承结合于所述第一缸筒的上部,所述副轴承结合于所述第二缸筒的下部;以及中间板,设置在所述主轴承和所述副轴承之间,使所述第一缸筒和所述第二缸筒分离;所述中间板形成有从一侧面朝向内部形成的油流路,通过沿着所述油流路移动的油进行热交换。(The invention relates to a rotary compression chamber comprising: a driving motor disposed inside the housing, and a rotating shaft coupled to the driving motor to transmit a rotational force; a first cylinder and a second cylinder, a compression space being formed at a circular center of the opening; a first roller and a second roller which revolve in the compression space; a first vane and a second vane for dividing a compression space of each cylinder into a suction chamber and a compression chamber; a main bearing coupled to an upper portion of the first cylinder and a sub bearing coupled to a lower portion of the second cylinder; and an intermediate plate provided between the main bearing and the sub bearing to separate the first cylinder from the second cylinder; the intermediate plate is formed with an oil flow path formed from one side surface toward the inside, and performs heat exchange by oil moving along the oil flow path.)
1. A rotary compressor, comprising:
a driving motor disposed inside the housing, and a rotating shaft coupled to the driving motor to transmit a rotational force;
a first cylinder and a second cylinder which are provided at different positions along the rotation shaft and have a compression space formed at a circular center of the opening;
a first roller and a second roller combined with the rotation shaft, the compression space formed in each cylinder tube being rotated;
a first vane and a second vane for dividing a compression space of each cylinder into a suction chamber and a compression chamber;
a main bearing coupled to an upper portion of the first cylinder and a sub bearing coupled to a lower portion of the second cylinder; and
an intermediate plate disposed between the main bearing and the sub bearing to separate the first cylinder from the second cylinder,
the intermediate plate is formed with an oil flow path formed from one side surface toward the inside, and performs heat exchange by oil moving along the oil flow path.
2. The rotary compressor of claim 1,
the oil flow passage is formed to penetrate through a side surface of the intermediate plate.
3. The rotary compressor of claim 1,
one side of the oil flow path is formed to overlap the compression chamber.
4. The rotary compressor of claim 1,
the oil flow path is formed in a plurality of,
each of the oil flow paths is formed in a direction crossing each other.
5. The rotary compressor of claim 1,
the oil flow path is formed separately from a discharge hole for moving the refrigerant.
6. The rotary compressor of claim 1,
the oil flow path is formed to have a circular cross section.
7. The rotary compressor of claim 1,
a groove of a predetermined shape is formed on an inner surface of the oil flow passage.
8. The rotary compressor of claim 1,
a spiral groove is formed on an inner surface of the oil flow passage.
9. The rotary compressor of claim 1,
an extension groove is formed on an inner surface of the oil flow passage in a direction in which the oil flow passage extends.
10. The rotary compressor of claim 1,
the oil flow path is formed to have a diameter smaller than a height of the intermediate plate.
Technical Field
The present invention relates to a hermetic compressor, and more particularly, to a rotary compressor capable of reducing the temperature of a compression element.
Background
A compressor, which is a vapor compression type refrigeration cycle device suitable for use in, for example, a refrigerator or an air conditioner, is classified into a rotary type and a reciprocating type according to the manner in which the compressor compresses a refrigerant.
The rotary compressor is a type in which a rolling piston (hereinafter, referred to as a roller) rotates or revolves in a cylinder tube to vary the volume of a compression space, and the reciprocating compressor is a type in which a roller reciprocates in a cylinder tube to vary the volume of a compression space.
As a rotary compressor, there is a rotary compressor that compresses a refrigerant by a rotational force of a transmission part.
In recent years, rotary compressors have been increasingly miniaturized, and improvement of their efficiency has been a major technical development goal. Further, research is continuously being conducted to obtain a higher Cooling Capacity (Cooling Capacity) by increasing the variable range of the operating speed of the miniaturized rotary compressor.
The rotary compressor is a compressor in which a compression space of a cylinder tube is divided into a suction chamber and a discharge chamber around a vane by contact between a roller and the vane. In a rotary compressor, a roller is rotated and a vane mounted on a cylinder tube is inserted and linearly moved to form a compression chamber having a variable volume (volume) of a suction chamber and a discharge chamber, thereby sucking, compressing, and discharging a refrigerant.
In recent years, a so-called vane rotary compressor provided with a hybrid cylinder is used in which an inner circumferential surface of a cylinder is formed in an elliptical shape or a shape combining an elliptical shape and a circular shape, thereby reducing friction loss and improving compression efficiency.
Generally, a hermetic compressor includes a drive motor for generating a driving force and a compression element for compressing a fluid by receiving the driving force of the drive motor, which are disposed in an inner space of a hermetic casing.
A drive motor and a compression unit are provided inside the casing, and the sucked refrigerant is compressed and discharged. The driving motor rotates the rotary shaft, and compresses the sucked refrigerant by the compression unit.
Since heat is generated during such compression, the temperature of the compression unit will rise. In this case, since heat is received from the overheated mechanism portion, the temperature of the refrigerant sucked into the compression unit through the accumulator increases, and therefore the specific volume decreases, a loss of cooling capacity occurs, and the efficiency of the compressor decreases.
As described in patent document 1, in order to limit the temperature rise of the compression unit accompanying the driving of the compressor, a method has been conventionally used in which an oil storage space and a refrigerant discharge space are separated from each other in a sub-bearing, and oil is stored separately in an internal space of a mechanism portion to perform heat exchange. However, in this case, there is a problem that there is a high possibility that refrigerant leakage occurs between the discharge chamber and the oil storage space, and there is a high possibility that refrigerant leakage occurs through the discharge chamber.
Accordingly, there is a need for a compressor structure that more effectively reduces the temperature of the compression unit as the compressor is driven, and does not leak refrigerant.
Disclosure of Invention
Problems to be solved by the invention
The invention aims to provide a structure of a compressor, which can reduce the temperature of a compression unit rising in the driving process of the compressor.
Another object of the present invention is to cool the compression unit by exchanging heat between the increased temperature of the compression unit and the oil contained in the casing.
Another object of the present invention is to more effectively reduce the temperature of the compression unit rising by moving the oil contained inside the casing to the inside of the intermediate plate.
Another object of the present invention is to reduce work required for compressing a refrigerant by limiting a temperature rise of the sucked refrigerant, thereby increasing efficiency of a compressor.
Another object of the present invention is to effectively reduce the temperature around the compression chamber by changing a simple structure of the intermediate plate without affecting the durability of the compression unit or changing the shape of the cylinder.
Means for solving the problems
In order to achieve the above object of the present invention, a rotary compressor of the present invention includes: a driving motor disposed inside the housing, and a rotating shaft coupled to the driving motor to transmit a rotational force; a first cylinder and a second cylinder, a compression space being formed at a circular center of the opening; a first roller and a second roller which revolve in the compression space; a first vane and a second vane for dividing a compression space of each cylinder into a suction chamber and a compression chamber; a main bearing coupled to an upper portion of the first cylinder and a sub bearing coupled to a lower portion of the second cylinder; and an intermediate plate disposed between the main bearing and the auxiliary bearing to separate the first cylinder from the second cylinder; the intermediate plate is formed with an oil flow path formed from one side surface toward the inside, and performs heat exchange by oil moving along the oil flow path.
Wherein the oil flow path may be formed to penetrate a side surface of the intermediate plate, and one side of the oil flow path may be formed to overlap the compression chamber, so that heat generated by driving the compressor may be more effectively absorbed.
According to another embodiment of the present invention, the oil flow path may be formed in plural, and the plural oil flow paths may be formed in directions intersecting with each other.
According to another embodiment of the present invention, the oil flow path is formed to have a circular cross section, or a groove having a predetermined shape is formed on an inner surface of the oil flow path, so that a contact area with the oil moving along the oil flow path can be increased.
Effects of the invention
The rotary compressor constructed as described above can cool the temperature of the compression unit, which is raised during the driving of the compressor, by heat exchange with the oil.
The oil contained in the casing can move along the oil flow path formed in the intermediate plate and exchange heat with the compression unit, thereby restricting a temperature rise of the refrigerant flowing in through the accumulator.
Further, by limiting the temperature rise of the sucked refrigerant, the work required for compressing the refrigerant can be reduced, and the efficiency of the compressor can be improved.
The oil flow path has a simple structure penetrating the side surface of the intermediate plate and is formed to overlap the compression space, thereby effectively reducing the high temperature of the compression chamber.
Drawings
Fig. 1 is a sectional view showing an internal form of a rotary compressor according to the present invention.
Fig. 2 is a perspective view showing a form of a compression unit provided in the rotary compressor.
Fig. 3 is an exploded view showing respective structures of the compressing unit of fig. 2.
Fig. 4 is a plan view showing a form of the compression unit in plan view.
Fig. 5 is a view showing a form in which each oil flow passage is formed in the intermediate plate.
Fig. 6a, 6b, and 6c are enlarged views of the internal form of each oil flow passage formed in the intermediate plate.
Fig. 7a to 7d are diagrams showing various modifications of the oil flow path formed in the
Detailed Description
Next, the hermetic compressor according to the present invention will be described in detail with reference to the drawings.
In this specification, singular references include plural references unless a different meaning is explicitly stated herein.
In describing the embodiments disclosed herein, if it is determined that the detailed description of the related known art does not hinder the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.
The drawings are only for the purpose of facilitating understanding of the embodiments disclosed herein, and the technical idea disclosed herein is not limited by the drawings, and it should be understood that the present invention includes the idea of the invention and all modifications, equivalents, and alternatives within the technical scope.
Fig. 1 is a sectional view showing an internal form of a rotary compressor 100.
The rotary compressor 100 of the present invention includes a casing 110, a driving motor 120, and a compression unit 130. The present invention will be described with respect to a configuration called a twin rotary compressor in which two
Next, the respective configurations of the present invention will be described, and the housing 110 is configured to have an external appearance, is formed in a cylindrical shape extending in one direction, and may be formed along the extending direction of the
The case 110 is composed of an upper case 110a, an intermediate case 110b, and a lower case 110 c. The driving motor 120 and the compression unit 130 may be fixedly installed on an inner surface of the middle case 110b, and the upper case 110a and the lower case 110c are coupled to an upper portion and a lower portion of the middle case 110b, respectively, to limit exposure of the components located inside the case 110 to the outside.
A compression unit 130 is provided inside the housing 110. The compression unit 130 functions to compress and discharge the refrigerant, and the compression unit 130 includes: rollers 134a, 134b, blades 135,
The drive motor 120 is provided inside the housing 110. The driving motor 120 is located at an upper portion of the compression unit 130, and functions to provide power for compressing the refrigerant. The driving motor 120 includes: stator 121, rotor 122, and
The stator 121 is fixedly installed inside the housing 110, and can be installed on the inner circumferential surface of the cylindrical housing 110 by a thermal compression method. For example, the stator 121 may be fixedly disposed at an inner circumferential surface of the middle case 110 b.
The rotor 122 may be disposed inside the stator 121 to be spaced apart from the stator 121. When power is applied to the stator 121, the rotor 122 is rotated by a force generated by a magnetic field formed between the stator 121 and the rotor 122, and the rotational force is transmitted to the
The intermediate casing 110b has a suction port 114a on one side thereof to allow suction of the refrigerant into the
The compression unit 130 compresses the sucked refrigerant, and the compressed refrigerant moves to a first discharge space 137 and a second discharge space 138 formed by discharge plates 136a and 136b provided at upper and lower portions of the compression unit 130, respectively, and then converges in an upper space of the casing 110 to move along the discharge port 114 b.
The refrigerant flowing into the
The friction generated between the respective structures during the compression process and the discharge process increases the temperature of compression unit 130, and the refrigerant sucked into compression unit 130 through accumulator 11 is heated by the heat of overheated compression unit 130, and in this case, the specific volume of the sucked refrigerant decreases, and a loss of the cooling capacity occurs, and thus, there is a problem that the compression efficiency of the compressor decreases.
Thus, in the rotary compressor 100 according to the present invention, the
Fig. 2 is a perspective view illustrating a form of the compression unit 130 provided inside the rotary compressor.
The compression unit 130 provided inside the casing 110 compresses the sucked refrigerant, and then the compressed refrigerant moves to an upper portion inside the compressor through the discharge spaces 137 and 138 and is discharged to the outside through the discharge port 114 b.
The compression unit 130 includes a
The
An
The rollers 134a and 134b that rotate about the
The
The rollers 134a and 134b include a first roller 134a disposed inside the
The rollers 134a and 134b are coupled to the
The first roller 134a and the second roller 134b move in contact with the inner circumferential surfaces of the first and
Since the first roller 134a and the second roller 134b have rotation centers different from each other with respect to the center of the
The
For example, as shown in fig. 2, a front end portion (not shown) of the
Similarly, the tip end (not shown) of the
The protrusion of each
The refrigerant flowing in from the suction flow path 111 is compressed and discharged. The compressed refrigerant moves along the discharge holes 133b formed in the inner surfaces of the
During the driving of the compressor, the pressure of the refrigerant contained in the compression chamber V2 increases due to the movement between the rollers 134a and 134b and the
Thus, in the present invention, the
Fig. 3 is an exploded view showing respective structures of the compressing unit of fig. 2.
The compression unit 130 is formed such that the
A first roller 134a is provided in the first
The hermetic compressor according to the present invention may be provided with
The oil contained in the casing 110 moves along the
The
That is, by a simple structural change in which the
Fig. 4 is a plan view of the form of the compression unit, showing the form of the
As described above, a plurality of
The
As shown in fig. 4, one side of each of the
The refrigerant in the compression chamber V2 accommodated in the
As shown in fig. 5, the
Fig. 6a, 6b, and 6c are enlarged views of the inside of the
As described above, each of the
In this case, the
Further, as shown in fig. 6b, grooves having a predetermined shape may be formed on the inner surfaces of the
As shown in fig. 6c,
The
Fig. 7a to 7d are views showing various modifications of the oil flow path formed in the
As described above, the oil flow path is formed in a manner to penetrate the side surface of the
As shown in fig. 7a and 7b, the
However, any of the
Also, as shown in fig. 7c, the
However, the
As shown in fig. 7d, the plurality of
The above description is only an embodiment of a rotary compressor for implementing the present invention, and the present invention is not limited to the above-mentioned embodiment, and as described in the claims, various modifications and implementation ranges that can be made by a person having ordinary skill in the art without departing from the gist of the present invention belong to the technical idea of the present invention.
Industrial applicability
The invention can be widely applied and applied to the field of producing rotary compressors or using compressors.
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