KR100856794B1 - Hermetic compressor - Google Patents

Abstract

The present invention relates to a hermetic compressor, and an object of the present invention is a hermetic compressor provided so that a shock absorber for buffering the compression unit and the driving unit effectively reduces vibrations generated from the compression unit and the mechanism unit, without causing a buckling or detachment. To provide.

And another object of the present invention is to provide a hermetic compressor provided to facilitate the installation of a shock absorber provided to buffer the compression unit and the drive unit.

To this end, the hermetic compressor according to the present invention includes a drive unit provided to provide a compression driving force of the refrigerant in the sealed container, a compression unit provided to perform a compression action of the refrigerant by receiving the driving force of the drive unit, and the pre-drive unit and the compression unit. A frame provided to install the unit is installed and provided between the frame and the sealed container to be supported by a shock absorber, wherein the shock absorber is formed in a leaf spring shape and fixed to the bottom of the sealed container; It comprises a second elastic member provided to support between the first elastic member and the frame.

Description

Hermetic Compressor {A HERMETIC TYPE COMPRESSOR}

1 is a cross-sectional view showing the main portion of the conventional hermetic compressor, showing the structure of the shock absorber.

2 is a cross-sectional view showing the overall structure of a hermetic compressor according to an embodiment of the present invention.

3 is a cross-sectional view showing an extract of the main structure in the hermetic compressor according to the preferred embodiment of the present invention, showing the structure of the shock absorber.

4 is a perspective view showing the structure of the first elastic member in the shock absorber of the hermetic compressor according to the preferred embodiment of the present invention.

FIG. 5 is a cross-sectional view showing an extract of a main part of the hermetic compressor according to the preferred embodiment of the present invention, showing the buffering operation by the shock absorber.

Explanation of symbols on the main parts of the drawings

10: sealed container 14: oil storage space

15: oil pick-up member 40: frame

41: upper boss portion 70: shock absorber

80: first elastic member 81: fixed portion

81a: distribution hole 82: extension part

82a: lower boss portion 90: second elastic member

The present invention relates to a hermetic compressor, and more particularly, to a hermetic compressor having an improved structure of a shock absorber for buffering the frame between the drive unit and the compression unit and the hermetic container.

In general, a hermetic compressor is adopted in a refrigerating cycle of an air conditioner or a refrigerator, and is configured to compress a refrigerant, and forms an appearance through a hermetically sealed container. Receiving the compression unit for compressing the refrigerant is installed through the frame.

The drive unit is provided with a conventional motor having a stator and a rotor, and the compression unit is composed of a piston and a cylinder, etc., between the frame and the bottom of the sealed container to support the load of the drive unit and the compression unit and the frame. At the same time, a shock absorber is provided to cushion the vibrations of the driving unit and the compression unit.

Further, in order to transmit the driving force of the driving unit to the compression unit, the frame is installed so that the rotating shaft penetrates so as to rotate together with the rotor when the driving unit is driven. The rotating shaft is provided with an eccentric portion which rotates eccentrically. The eccentric portion and the piston are connected via a connecting rod so that the movement is transmitted to the linear reciprocating motion of the piston.

Through this structure, if the eccentric portion is rotated eccentrically while the rotating shaft is rotated together with the rotor by the driving unit, the piston connected through the eccentric portion and the connecting rod is linearly reciprocated in the cylinder, and the refrigerant is compressed by the compression unit. The action is performed.

In addition, the hermetic compressor is provided with an oil lubrication structure for lubricating the friction sliding portions of the drive unit and the compression unit with oil.

First, an oil storage space for storing a predetermined amount of oil is formed at the bottom of the sealed container, and an oil pick-up member is installed at the lower end of the rotary shaft to suck up the oil in the oil storage space to the top by using centrifugal force of the rotary shaft. An oil passage for guiding the oil sucked upward through the oil pick-up member to the friction sliding portion of the driving unit and the compression unit is provided.

Therefore, the oil drawn up to the upper portion along the oil pick-up member during the rotational movement of the rotating shaft according to the compression action of the refrigerant is supplied to the friction sliding portion of the drive unit and the compression unit along the oil flow path to perform lubrication.

On the other hand, Figure 1 shows the structure of the shock absorber in such a conventional hermetic compressor.

For reference, reference numerals 1 and 2 are the airtight container and the frame, another reference numerals 3 and 4 are the oil pickup member and the connecting rod, and another reference numerals 5 and 6 are the rotating shaft and the oil storage space. to be.

As illustrated in FIG. 1, the shock absorber 7 includes a spring spring 7b provided to elastically support the frame 2 and the bottom of the sealed container 1, and an upper end of the spring spring 7b is fitted and fixed thereto. The upper boss portion 7a provided on the lower surface of the frame 2 and the lower boss portion 7c provided on the bottom side of the airtight container 1 so that the lower end of the spring spring 7b is fitted and fixed therein, such a shock absorber (7) is usually installed at three or four points between the frame (2) and the bottom of the sealed container (1).

The upper boss portion 7a is integrally formed with the frame 2 when the frame 2 is manufactured, and the lower boss portion 7c is installed to be fixed to the bottom side of the sealed container 1 in a separately manufactured state. The bottom of the sealed container (1) corresponding to the installation portion of each spring spring (7b) to secure the oil storage space (6) while sufficiently separating the drive unit and the compression unit from the bottom of the sealed container (1) Three or four places of are press-processed so that they may become convex to the upper part.

However, the conventional shock absorber 7 of the hermetic compressor has the following problems.

First, the shock absorber 7 is basically provided so that the spring spring 7b has a large spring constant so as to be joined to support the overall load of the frame 2 and the compression unit and the drive unit installed in the frame 2. Preferably, when the spring constant of the spring spring 7b becomes large, the spring spring 7b itself serves as a medium for transmitting vibrations of the drive unit and the compression unit to the top of the frame 2 to the sealed container 1. As a result, the vibration generated from the driving unit and the compression unit is excessively transmitted to the sealed container 1. On the contrary, if the spring constant of the spring spring 7b is made small to suppress it, the linear reciprocating motion of the piston and the eccentric motion of the rotation shaft 5 toward the eccentric portion are in a direction intersecting with the axial direction of the rotation shaft 5. By the force generated, the spring 7 is buckled or the spring 7a is separated from the upper and lower bosses 7a and 7c, and the shock absorber 7 can perform its function. There will be no.

In addition, in the above-described mounting structure of the shock absorber (7), a process of press working the convex bottom of the sealed container (1) of the lower boss portion (7c) mounting portion is added to the upper portion, the lower boss portion (7c) is installed In the process of press-processing the sealed container 1 of the site to be part, there were various difficulties in installing the shock absorber 7 such that the sealed container 1 of this site was formed to be thinner than other parts and was torn or broken.

The present invention is to solve such a problem, an object of the present invention is that the shock absorber provided to buffer the compression unit and the drive unit is buckled or released while effectively reducing the vibration generated from the compression unit and the mechanism unit To provide a hermetic compressor provided so that there is no.

And another object of the present invention is to provide a hermetic compressor provided to facilitate the installation of a shock absorber provided to buffer the compression unit and the drive unit.

The hermetic compressor according to the present invention for achieving the above object is a drive unit provided to provide a compression driving force of the refrigerant in the sealed container, a compression unit provided to receive the drive force of the drive unit to perform the compression action of the refrigerant; A frame provided to install a drive unit and a compression unit is installed, and the frame and the sealed container are provided to be supported by a shock absorber, wherein the shock absorber is formed in a leaf spring shape and is fixed to the bottom of the sealed container. And an elastic member and a second elastic member provided to support the first elastic member and the frame.

The first elastic member includes a fixing part fixed to the bottom of the hermetic container and a plurality of extension parts extending from the fixing part, and the extension part has a free end in a vertical direction with respect to the fixing end toward the fixing part. It is characterized in that the elastic deformation is provided.

The second elastic member is provided with a spring spring, and the boss portion is provided so that the upper end and the lower end of the second elastic member are inserted and fixed to the free ends of the frame and the extension.

In addition, the hermetic compressor according to the present invention includes an oil storage space provided at the bottom of the airtight container, a rotating shaft installed to penetrate the frame to transfer the driving force of the driving unit to the compression unit, and the oil of the oil storage space. An oil pick-up material installed at the lower end of the rotary shaft to suck up the upper portion by using the centrifugal force of the rotary shaft, and the oil sucked upwardly through the oil pick-up member to the friction sliding part of the driving unit and the compression unit. It further comprises an oil passage provided, characterized in that the fixing portion is provided to partition the oil storage space toward the oil pickup member from the surrounding oil storage space.

In addition, the fixing portion is provided in a ring shape, the extension portion is characterized in that it is provided to be curved to extend outward from the upper end of the fixing portion.

In addition, the fixing portion is characterized in that the distribution hole for the distribution of oil between the inside and the outside of the fixing portion is provided.

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

As shown in FIG. 2, the hermetic compressor according to the present embodiment is employed in a refrigeration cycle such as an air conditioner or a refrigerator, and is configured to compress the refrigerant delivered from the evaporator of the refrigeration cycle and supply it to the condenser of the refrigeration cycle. (10a) and the lower container (10b) forms an appearance through the sealed container (10) formed by being coupled to each other.

One side of the sealed container 10 is installed with a suction pipe 11 for guiding the refrigerant passing through the evaporator of the refrigeration cycle into the sealed container 10, and the other side of the sealed container 10 is compressed in the sealed container 10 A discharge tube 12 for guiding the refrigerant toward the condenser of the refrigeration cycle is installed.

In addition, the inside of the sealed container 10 is provided with a compression unit 20 for performing a compression action of the refrigerant and a drive unit 30 for providing a driving force according to the compression action of the refrigerant, such a compression unit 20 and the drive unit 30 is installed through the frame 40.

The driving unit 30 is a stator 31 fixed to the upper outer side of the frame 40, and a rotor 32 rotatably provided inside the stator 31 to rotate by electromagnetic interaction with the stator 31. It is provided.

In addition, the compression unit 20 has a cylinder 21 integrally provided with the frame 40 at one side of the lower side of the frame 40 so that an internal space forms the compression chamber 21a, and a straight line inside the compression chamber 21a. A cylinder head which is coupled to one end of the cylinder 21 so as to seal the piston 22 and the compression chamber 21a which are installed to reciprocate, and the refrigerant suction chamber 23a and the refrigerant discharge chamber 23b are mutually partitioned ( 23 and a flow of the refrigerant provided between the cylinder 21 and the cylinder head 23 to be sucked into the compression chamber 21a from the refrigerant suction chamber 23a or discharged from the compression chamber 21a to the refrigerant discharge chamber 23b. It is provided with a valve device 24 for intermittent. Here, in the case of the refrigerant suction chamber 23a of the cylinder head 23, the refrigerant supplied into the sealed container 10 along the suction tube 11 is connected to the suction tube 11 to the compression chamber 21a. The refrigerant discharge chamber 23b is connected to the discharge tube 12 to guide the refrigerant compressed and discharged from the compression chamber 21a to the discharge tube 12.

The driving force of the driving unit 30 is transmitted to the compression unit 20 through the rotation shaft 50 and the connecting rod 60. That is, the rotating shaft 50 is installed to penetrate the center portion of the frame 40, the rotor 32 is pressed into the rotating shaft of the upper portion of the frame 40, the rotating shaft 50 extending below the frame 40 The lower end of the eccentric rotation to form an eccentric 51, the eccentric 51 and the piston 22 is connected via a connecting rod (60). In the upper portion of the frame 40, the rotating shaft 50 below the rotor 32 is rotatably supported by a journal bearing 13 fixed to the frame 40.

Due to the electromagnetic interaction between the stator 31 and the rotor 32 by the rotating shaft 50 and the connecting rod 60, the eccentric portion 51 is rotated while the rotating shaft 50 rotates together with the rotor 32. When the eccentric rotation, the piston 22 connected through the eccentric 51 and the connecting rod 60 is a linear reciprocating motion in the compression chamber 21a. When a pressure difference is formed between the inside and the outside of the compression chamber 21a by the linear reciprocating motion of the piston 22, the pressure is sucked into the compression chamber 21a via the suction pipe 11 and the refrigerant suction chamber 23a through the pressure difference. The refrigerant is compressed in the compression chamber 21a and discharged along the refrigerant discharge chamber 23b and the discharge tube 12, and the compression operation of the refrigerant is performed as this process is repeatedly performed.

In addition, the hermetic compressor is provided with an oil lubrication structure for lubricating the friction sliding portions of the drive unit 30 and the compression unit 20 through oil.

First, an oil storage space 14 for storing a predetermined amount of oil is formed at the bottom of the sealed container 10, and at the bottom of the rotation shaft 50, the oil storage space 14 is formed by using a centrifugal force of the rotation shaft 50. An oil pick-up member 15 is installed to draw oil upwards, and the oil that has been sucked upward through the oil pick-up member 15 is rotated on the rotation shaft 50 between the driving unit 30 and the compression unit 20. An oil flow path 52 for guiding the sliding part is provided. Here, the oil passage 52 is provided to transfer oil between the rotating shaft 50 and the journal bearing 13 or toward the connecting rod 60 and the piston 22.

Therefore, the oil drawn up from the oil storage space 14 along the oil pick-up member 15 along the oil pickup member 15 during the rotational movement of the rotation shaft 50 according to the compression action of the refrigerant is driven along the oil passage 52. ) Is supplied to the friction sliding part of the compression unit 20 to perform lubrication.

On the other hand, as shown in Figure 3 and 4, between the frame 40 and the bottom of the sealed container 10 supports the load of the frame 40, the drive unit 30 and the compression unit 20 and At the same time, a shock absorber 70 is provided to reduce vibration generated by the driving of the drive unit 30 and the compression unit 20. In the present embodiment, the shock absorber 70 is formed in a leaf spring shape to be closed. It comprises a first elastic member 80 is fixed to the bottom of the container 10, and the second elastic member 90 provided to support between the first elastic member 80 and the frame 40.

The first elastic member 80 provided in the form of a double leaf spring supports the compression unit 20 and the drive unit 30 while supporting the load of the compression unit 20 and the drive unit 30 and the frame 40 on which they are installed. In order to absorb the vertical vibration in accordance with the driving of the), and comprises a fixing portion 81 is fixed to the bottom of the sealed container 10, and a plurality of extensions 82 extending from the fixing portion 81 do.

The first fixing portion 81 has a ring shape having the height of the oil storage space 14 so as to partition the central portion of the oil storage space 14 toward the oil pick-up member 15 from other oil storage spaces around. It is provided is welded to the bottom surface of the sealed container 10 through the bottom is fixed, according to the stirring of the oil generated in the oil storage space 14 around the oil pick-up member 15 during the rotation operation of the oil pick-up member 15 The noise may be blocked by the fixing portion 81 without being radiated to the oil storage space 14 as a whole.

In addition, the fixing part 81 is provided with a distribution hole 81a for distributing oil between the inside and the outside of the fixing part 81, and an oil oil level inside the fixing part 81 and an oil level outside the fixing part 81 are provided. It is preferable to be provided to maintain the same height, the distribution hole (81a) is formed in a plurality of spaced apart from each other at regular intervals along the circumferential direction of the fixing portion (81).

In addition, the extension part 82 is provided to be integrally extended from the upper end of the fixing part 81 to be curved outwardly, and the extension part 82 has an end side free end up and down with respect to the fixing end side fixing end. It is provided in the form of a plate thinly formed in the ratio to the thickness so as to be elastically deformed to perform a substantial vibration absorbing action, in this embodiment, the extension portion 82 to support the entire frame 40 evenly fixed portion 81 Are spaced apart from each other at 90 degree intervals around the top.

In addition, the second elastic member 90 is provided with a spring spring to support between the first elastic member 80 and the frame 40. Accordingly, the hermetic compressor according to the present embodiment is compressed with the driving unit 30. Between the frame 40 on which the unit 20 is installed and the sealed container 10 are doubled through the first elastic member 80 and the second elastic member 90 installed on the first elastic member 80. It has a structure that is elastically supported.

In order to install the second elastic member 90, the free ends of each of the extension portions 82 of the first elastic member 80 are somewhat flat, so that the lower end of the second elastic member 90 is fitted and fixed thereon. The lower boss portion 82a is formed, and four upper boss portions 41 are provided on the lower surface of the frame 40 so that the upper end of the second elastic member 90 is fitted into and fixed. The upper boss portion 41 may be integrally formed with the frame 40 when the frame 40 is manufactured.

Therefore, when the elasticity between the frame 40 and the sealed container 10 is dually supported by the second elastic member 90 and the first elastic member 80, the linear reciprocating motion and the rotating shaft of the piston 22 (50) The second elastic member is buckled by the force generated in the direction intersecting the axial direction of the rotation shaft 50 due to the eccentric movement of the eccentric portion 51 or the upper and lower boss portions 41, Even if the spring constant of the second elastic member 90 is increased so that there is no risk of deviation from 82a), the spring constant of the first elastic member 80 is relatively smaller than that of the second elastic member 90 so as to drive the unit. Since the vertical vibration generated by the 30 and the compression unit 20 can be effectively reduced, the shock absorber 70 is damaged while effectively reducing the vibration generated from the compression unit 20 and the drive unit 30. There is no fear .

Referring to FIG. 5, a vertical vibration of the compression unit 20 and the driving unit 30 when the refrigerant is compressed is absorbed through the buffering action of the shock absorber 70.

In addition, since the shock absorber 70 according to the present embodiment has a structure in which the second elastic member 90 is installed on the first elastic member 80, the sealed container 10 toward the shock absorber 70 as in the prior art. Even if the bottom is not press-processed to be convex, the oil storage space 14 can be secured while sufficiently separating the driving unit 30 and the compression unit 20 from the bottom of the sealed container 10.

Therefore, the hermetic compressor according to the present embodiment welds the fixing part 81 to the bottom of the hermetic container 10 without pressing the bottom of the hermetic container 10 to be convex as in the prior art. ) And a second elastic member (2) to the lower boss portion (82a) provided in each of the extension portion (82) of the first elastic member 80 and thus fixed to the upper boss portion (41) formed in the frame (40). Since the installation work of the shock absorber 70 is completed through a simple operation of fitting the lower end and the upper end of 90), the installation work of the shock absorber can be made more easily.

As described above in detail, the hermetic compressor according to the present invention includes a first elastic member in the form of a leaf spring in which a shock absorber for supporting a frame between the drive unit and the compression unit and the sealed container is fixed to the bottom of the sealed container, and such an elastic member. And a second elastic member supporting the frame to elastically support the frame and the sealed container.

Accordingly, in the hermetic compressor according to the present invention having such a shock absorber, the second elastic member is buckled by a force generated in a direction intersecting the axial direction of the rotary shaft due to the linear reciprocating motion of the piston and the eccentric motion of the rotary shaft eccentric. ), Even if the spring constant of the second elastic member is increased so that the spring constant of the second elastic member is smaller than that of the second elastic member, the driving unit and the compression unit Since it is possible to effectively reduce the vertical vibration generated by the vibration, there is no fear that the shock absorber is damaged or released from the position while effectively reducing the vibration generated from the compression unit and the mechanism unit.

In addition, since the shock absorber has a structure in which the second elastic member is installed on the first elastic member, the driving unit and the compression unit may not be press-processed so that the bottom of the sealed container side is convex to the upper side as in the prior art. The oil storage space can be secured while sufficiently spaced apart from the bottom of the sealed container, thereby facilitating the installation of the shock absorber.

Claims (6)

A drive unit provided to provide the compression driving force of the refrigerant inside the sealed container, a compression unit provided to perform the compression action of the refrigerant by receiving the driving force of the drive unit, and a frame provided to install the pre-drive unit and the compression unit, In the hermetic compressor provided between the frame and the hermetic container through a shock absorber, The shock absorber includes a first elastic member provided in the form of a leaf spring and fixed to the bottom of the sealed container, and a second elastic member provided to support the first elastic member and the frame. The first elastic member includes a fixing part fixed to the bottom of the hermetic container, a plurality of extensions extending from the fixing part, The extension part is provided so that the free end can be elastically deformed in the up and down direction with respect to the fixing end side, An oil storage space provided at the bottom of the sealed container, a rotating shaft installed to penetrate the frame to transfer the driving force of the driving unit to the compression unit, and the oil in the oil storage space to the upper side by using centrifugal force of the rotating shaft. An oil pickup member installed at the lower end of the rotary shaft to suck up, and an oil passage provided on the rotary shaft to guide the oil sucked upward through the oil pickup member to the friction sliding portion of the drive unit and the compression unit, The fixing unit is a hermetic compressor, characterized in that to partition the oil storage space toward the oil pickup member from the surrounding oil storage space. delete The method of claim 1, The second elastic member is provided with a spring spring, Hermetic compressor, characterized in that the boss portion is provided at the free end of the frame and the extension portion is inserted and fixed to the upper end and the lower end of the second elastic member. delete The method of claim 1, The fixed part is provided in a ring shape, the extension part is a hermetic compressor characterized in that it is provided so as to extend curvature from the upper end to the upper outer side. The method of claim 1, The fixed part is a hermetic compressor, characterized in that a distribution hole is provided for the distribution of oil between the inside and the outside of the fixing portion.

Images