KR20090128303A - Enclosed-type compressor - Google Patents

Abstract

PURPOSE: An enclosed type compressor is provided to improve compressor efficiency by increasing closing speed of a discharge valve. CONSTITUTION: An enclosed type compressor comprises a cylinder, a piston, a head(7), and a discharge valve device(16). The discharge valve device has a discharge valve(9), a retainer(12), and a stopper. The discharge valve has a base(9c), an opening and closing part(9a) which opens and closes a discharge hole of the head, and an intermediate part which connects the base and the opening and closing part. The retainer has a base(12b), a valve support(12c) contacted with the opening and closing part, an intermediate part(12d) which connects the base and the valve support, and a free end(12e). In case the valve support closes the opening and closing part of the discharge valve, the free end is contacted with the stopper, and elastic force is generated on the valve support.

Description

Hermetic compressors {ENCLOSED-TYPE COMPRESSOR}

The present invention relates to a hermetic compressor, and is particularly suitable for hermetic compressors having a discharge valve device having a discharge valve and a retainer.

In recent years, the increase in the capacity of the refrigerator has progressed, and the performance improvement of the hermetic compressor used for the refrigerator is required.

As a conventional hermetic compressor, there is one disclosed in Japanese Patent Laid-Open No. 2007-9862 (Patent Document 1). The discharge valve device of the hermetic compressor is configured such that discharge leads, spring leads, and stoppers are attached to a plate with discharge holes at predetermined intervals. In this discharge valve device, the discharge lead and the spring lead are prevented from being damaged by contacting the stopper while the discharge lead and the spring lead are in close contact with each other when performing the discharge operation.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2007-9862

However, in patent document 1, since the elastic force which returns a discharge lead and a spring lead is given only by the deformation | transformation at the time of discharge operation, it is difficult to provide sufficient elastic force by the deformation amount of discharge operation. For this reason, when switching from the discharge operation to the suction operation, the return of the discharge lead and the spring lead is delayed, and the closing delay of the discharge lead occurs, resulting in an increase in loss due to the re-suction of the discharged refrigerant gas.

An object of the present invention is to obtain a hermetic compressor which can improve the compressor efficiency by increasing the speed at which the discharge valve is closed.

According to a first aspect of the present invention for achieving the above object, a compression element for compressing a refrigerant gas and a transmission element for driving the compression element are accommodated in a sealed container, the compression element comprising: a cylinder having a cylinder chamber; A piston for reciprocating in the cylinder chamber, a head having a discharge hole and installed in the cylinder so as to cover the cylinder chamber, and a discharge valve device, wherein the discharge valve device is an elongated long cylinder provided on the half cylinder side of the head. A discharge valve, an elongated retainer provided on the half head side of the discharge valve, and a stopper provided on the half discharge valve side of the retainer to limit the lift amount of the discharge valve and the retainer, the discharge valve being installed A base portion, an opening and closing portion for opening and closing the discharge hole of the head, an installation base portion of the discharge valve, and the discharge valve And an intermediate portion for contacting the opening and closing portion of the retainer, wherein the retainer includes an installation base portion, a valve support portion for contacting the opening and closing portion of the discharge valve, and an intermediate portion for contacting the installation base portion of the retainer and the valve support portion of the retainer. In the hermetic compression valve, the retainer has a free end extending from the valve support of the retainer to the semi-base portion, and the free end of the retainer is provided when the valve support of the retainer closes the opening and closing of the discharge valve. The stopper is in contact with the stopper so as to generate an elastic force in the discharge valve direction in the valve support portion of the retainer in a state spaced apart from the opening and closing portion of the retainer.

The more preferable specific structural example in this 1st aspect of this invention is as follows.

(1) The retainer is provided with a mounting base of the retainer as a raised part, and the mounting base of the retainer is pressed against and fixed to the mounting base of the stopper so that the valve support of the retainer is opened from the opening and closing of the discharge valve. Being spaced apart.

(2) The retainer is a contact portion of the retainer with the valve support portion spaced apart from the open / close portion at the time of closing the open / close portion of the discharge valve so that the retaining base portion of the retainer and the free end of the retainer are supported. And bent toward the semi-discharge valve side.

(3) The retainer is contacted with the opening and closing part of the discharge valve when the opening and closing part of the discharge valve is opened, and the valve support part of the retainer is deformed together with the opening and closing part with the support base of the retainer and the free end of the retainer as the supporting point. Being in contact with.

(4) The retainer is provided with an elastic adjustment portion that contacts the stopper and changes the elastic force of the retainer before the valve support of the retainer deforms and contacts the stopper.

Moreover, in the 2nd aspect of this invention, the compression element which compresses refrigerant gas, and the transmission element which drives this compression element are comprised in the sealed container, The said compression element is a cylinder which has a cylinder chamber, and the inside of the cylinder chamber is comprised. A reciprocating piston, a head having a discharge hole and covering the cylinder chamber in the cylinder, an elongated discharge valve provided on the half cylinder side of the head, an elongated retainer provided on the half head side of the discharge valve; And a stopper provided on the half discharge valve side of the retainer to limit the discharge valve and the lift amount of the retainer, wherein the discharge valve includes an installation base portion, an opening and closing portion for opening and closing the discharge hole of the head, and the discharge. And an intermediate portion for communicating the mounting base portion of the valve and the opening and closing portion of the discharge valve, wherein the retainer In the hermetic compressor having a valve support portion in contact with the opening and closing portion of the discharge valve, and an intermediate portion contacting the mounting base portion of the retainer and the valve support portion of the retainer, the retainer is formed with a granular portion. The base of the retainer is pressed against the stop of the stopper so that the valve support of the retainer is kept spaced apart from the opening and closing of the discharge valve.

The more preferable specific structural example in this 2nd aspect of this invention is as follows.

(1) The retainer has a free end extending from the valve support portion of the retainer to the semi-base portion side, and the free end of the retainer has the open / close portion when the valve support portion of the retainer closes the opening and closing portion of the discharge valve. Being in contact with the stopper so as to generate an elastic force in the discharge valve direction in the valve support portion of the retainer.

(2) The said retainer is deformed together with the said opening-and-closing part by making the opening-and-closing part of the said discharge valve contact, the installation base part of the said retainer, and the free end of the said retainer as a supporting point, and contacting the stopper, and the lift amount Limited.

According to the hermetic compressor of the present invention, the efficiency of the compressor can be improved by increasing the speed at which the discharge valve is closed.

EMBODIMENT OF THE INVENTION Hereinafter, several embodiment of this invention is described using drawing. The same code | symbol in the drawing of each embodiment shows the same or equivalent.

(1st embodiment)

The hermetic compressor of the first embodiment of the present invention will be described with reference to Figs.

First, the whole of the hermetic compressor 50 of this embodiment is demonstrated, referring FIG. 1 is a longitudinal sectional view of the hermetic compressor 50 of the present embodiment.

The hermetic compressor 50 constitutes a part of a refrigeration cycle of the refrigerator. The hermetic compressor 50 is a reciprocating compressor configured by storing a compression element 22 for compressing a refrigerant gas in a hermetic container 21 and a transmission element 23 for driving the compression element 22. The compression element 22 and the transmission element 23 are arranged up and down in the hermetic container 21 and connected via the crankshaft 3 arranged vertically. Lubricating oil is stored in the bottom of the airtight container 21.

The compression element 22 comprises a cylinder 1 having a cylinder chamber 1a extending in the horizontal direction, a piston 4 for reciprocating left and right inside the cylinder chamber 1a, and a connection for driving the piston 4. The rod 2 and the head structure 24 provided so that the cylinder 1 may be covered by the cylinder 1 are comprised.

The cylinder 1 is constituted by a part of the cylinder block 25. The cylinder block 25 is comprised from the casting body which integrally formed the frame 1 which consists of the cylinder 1, the bearing part 14a of the crankshaft 3, and the support part 14b to the transmission element 23. As shown in FIG. .

The piston 4 is connected to the eccentric shaft portion of the crankshaft 3 via the connecting rod 2 and reciprocates in the cylinder chamber 1a by the rotation of the crankshaft 3. By the reciprocating motion of the piston 4, the refrigerant gas in the sealed container 21 is sucked into the cylinder chamber 1a through the head structure 24 and compressed, and the compressed refrigerant gas is externally supplied through the head structure 24. Discharged.

The transmission element 23 is composed of a stator 5 elastically supported on the bottom surface of the sealed container 21 and a rotor 6 fixed to the crankshaft 3, and is provided with a lower portion of the frame 14. Is placed on.

The crankshaft 3 is disposed through the bearing portion 14a of the frame 14 and is axially supported by the frame 14. The oil supply piece 17 is attached to the lower end part of the crankshaft 3.

In such a configuration, when the rotor 6 is rotated by energizing the transmission element 23, the crankshaft 3 rotates with this. Thereby, the crank pin 3a is eccentrically rotated, and the piston 4 reciprocates in the cylinder chamber 1a via the connecting rod 2 connected to the crank pin 3a. Since the inner side of the cylinder chamber 1a is closed by the head 7 which has the suction hole 7e and the discharge hole 7b, the refrigerant | coolant in the airtight container 21 is a cylinder by the reciprocating motion of the piston 4, It is sucked into the chamber 1a, compressed in the cylinder chamber 1a, and discharged to the outside via the discharge valve device 16.

In addition, the lubricating oil stored in the sealed container 21 is led upward by the rotation of the crankshaft 3, and the lubricating oil is ejected from the opening formed in the upper position of the crankshaft 3. Specifically, the lubricating oil is raised by using the centrifugal force of the cylindrical oil supply piece 17 provided at the lower end of the crankshaft 3, and the lubricating oil is ejected from the upper end of the crankshaft 3.

Next, the head structure 24 will be described in detail with reference to FIGS. 1 to 7. 2 is an exploded perspective view of the discharge valve device 16 of the head structure 24 of FIG. 1, FIG. 3 is a cross sectional view of the discharge valve device 16 of FIG. 2, and FIG. 4 is a discharge valve device of FIG. 16 is an enlarged cross-sectional view of FIG. 4, FIG. 6 is a plan view showing the relationship between the discharge valve 9 and the retainer 12 of the discharge valve device 14 of FIG. 7 is a front view of the head 7 of the discharge valve device 14 of FIG. 3 and 4 only show the basic structure without the specific structure of the head 7.

The head structure 24 is composed of a head 7, an intake valve 8, a discharge valve device 16, a head cover 15, and the like. The discharge valve device 16 is composed of a discharge valve 9, a retainer 12, and a stopper 11.

The head 7 has a substantially rectangular outline, and is formed of a cast of a flat plate shape thicker than the intake valve 8 and the discharge valve 9. The head 7 is provided to cover the cylinder chamber 1a on one end surface of the cylinder 1 via the intake valve 8. In the center part of the head 7, the suction hole 7e comprised by the circular through hole and the discharge hole 7b comprised by the circular through hole are formed in a line. At the periphery of the discharge hole 7b, an annular sheet surface 7a is provided. At four corners of the head 7, a bolt hole 7f is formed to allow the bolt to pass therethrough. The recessed part 7d is formed in the surface of the half cylinder side of the head 7, The discharge hole 7b and the sheet surface 7a are arrange | positioned in this recessed part 7d. Moreover, four stopper contact parts 7c which contact the stopper 11 are formed in the recessed part 7d.

The intake valve 8 is formed by the thin spring plate which has the substantially same external shape as the head 7. This suction valve 8 has a valve part which opens and closes the suction hole 7e, and the discharge hole communicated with the discharge hole 7b.

The discharge valve 9 is formed of an elongated strip-shaped thin spring plate, and is formed in a flat shape in a discharge valve alone state. The discharge valve 9 is provided with a mounting base 9c to the head 7 installed at one end, an opening and closing portion 9a provided at the other end to open and close the seat surface 7a, and an installation base 9c. And an intermediate portion 9b which communicates with the opening and closing portion 9a, is disposed on the half cylinder side of the head 7 to open and close the discharge hole 7b. The opening-and-closing part 9a is comprised from the disk part of the external shape substantially the same as the external shape of the seat surface 7a, and has the width (diameter) larger than the width | variety of the intermediate part 9b.

The retainer 12 is formed of a thin spring plate having an elongated strip shape. The retainer 12 is formed slightly thinner than the discharge valve 9 so as to cover the opening / closing portion 9a on the half head side of the discharge valve 9 so as to cover the retainer discharge valve support portion 12c. Adjust the lift action. In addition, the retainer 12 communicates the mounting base portion 12b to the head 7 with the valve support portion 12c to which the opening and closing portion 9a is in contact, and the mounting base portion 12b and the valve support portion 12c. The intermediate portion 12d, the free end 12e extending from the valve support portion 12c toward the semi-base portion side, and the elastic adjustment portion 12a for changing the elastic force of the retainer 12 during the discharge operation. have.

The valve support part 12c is comprised from the disk part of the external shape substantially the same as the external shape of the opening-and-closing part 9a, and has the width (diameter) larger than the width | variety of the intermediate part 12d and the free end part 12e. In this way, since the opening and closing portion 9a of the discharge valve 9 is covered by the valve support portion 12c of the retainer 12, high reliability can be obtained against damage of the opening and closing portion 9a.

In the retainer alone state, the valve support portion 12c, the intermediate portion 12d, and the free end 12e are formed in a flat shape, and the installation base portion 12b is inclined from one side end of the intermediate portion 12d to stand up. It is comprised from the part 12b ₁ and the granular part which consists of the part 12b ₂ extending horizontally from this. The elasticity adjusting part 12a is comprised from the part which inclines and granulates from both sides of the intermediate part 12d.

The stopper 11 is formed of an elongated strip-shaped thick plate, and is disposed on the half discharge valve side of the retainer 12 to limit the lift amount of the discharge valve 9 and the retainer 12. The stopper 11 includes a mounting base portion 11a to the head 7 provided at both end portions, and a retainer supporting portion 11b to which the valve support portion 12c and the intermediate portion 12d of the mounting base portion 12 come into contact with each other. ) Is configured. The retainer base 11b protrudes upward from the installation base portion 11a.

The assembly method of the discharge valve apparatus 16 is demonstrated. First, the discharge valve 9 is mounted on the bottom surface of the recessed portion 7d of the head 7 (see Fig. 3). Since the installation base portion 9c of the discharge valve 9 has the same outline as the space formed by the side wall of the recessed portion 7d and the side wall of the stopper contact portion 7c, the discharge valve 9 has a horizontal direction. The movement is limited and loaded.

Subsequently, the mounting base 12 is inserted into the recess 7d of the head 7 and mounted on the discharge valve 9 (see FIG. 3). Since the retainer base 12b of the mounting base 12 has the same contour as the space formed by the side wall of the recess 7d and the side wall of the stopper contact 7c, the mounting base 12 is in the horizontal direction. The movement to is restricted and will be loaded. In this state, the upper end part of the retainer base part 12b protrudes upwards rather than the upper surface of the stopper contact part 7c.

Subsequently, the stopper 11 is inserted into the recessed portion 7d of the head 7, the mounting base 11a is brought into contact with the stopper contact portion 7c, and the stopper 11 is moved by a rivet (not shown). Fixing to the head 7 (see Fig. 4). By fixing the stopper 11, the retainer support portion 12b is deformed downward so that the tip portion of the horizontal portion 12b ₂ is in contact with the discharge valve 9, while the upper end portion of the retainer support portion 12b is stopped at the stopper contact portion ( Lower to the height of 7c). With the deformation of the retainer base 12b, the free end side of the mounting base 12 is lifted, and the valve base 12c, the middle 12d and the free end 12e of the mounting base 12 are lifted. Is spaced apart from the discharge valve 9. The free end 12e is in contact with the lower surface of the mounting base 11a of the stopper 11, and the mounting base 12 is half discharged using the mounting base 12b and the free end 12e as supporting points. It is curved toward the valve side, and an elastic force in the discharge valve direction is generated in the valve support part 12c. According to this embodiment, with the simple structure and simple assembly method, the installation base part 12 can be made spaced apart from the discharge valve 9, and the elastic force of the discharge valve direction is applied to the installation base part 12 at the same time. It can be maintained.

In the discharge operation during the operation of the hermetic compressor 50, the refrigerant introduced into the cylinder chamber 1a is compressed by the piston 4, and the pressure of the compressed refrigerant is discharged to the discharge hole 7b of the head 7. The opening / closing portion 9a is spaced apart from the seat surface 7a by contacting the valve support portion 12c by being imparted to the opening / closing portion 9a of the discharge valve 9 through. In addition, the opening and closing portion 9a and the valve support portion 12c are deformed in close contact with each other, and the elastic adjustment portion 12a is in contact with the retainer support portion 11b so that the spring characteristics of the opening and closing portion 9a and the valve support portion 12c. After this change, the elastic adjustment part 12a is in contact with the retainer support part 11b. Thereby, the most suitable spring characteristic at the time of operation | movement of the discharge valve 9 can be maintained, and operation | movement and reliability of the discharge valve 9 at the time of discharge can be ensured.

Then, when switching from the discharge operation to the suction operation, the pressure in the cylinder chamber 1a is lowered, so that the discharge valve 9 and the mounting base portion 12 are returned to their original state by these elastic forces to the opening and closing portion 9a. The seat surface 7a is closed. Here, since the elastic force in the discharge valve direction is held in advance in the installation base portion 12, the closing of the discharge valve 9 can be made faster, and the closing efficiency of the discharge valve 9 can be prevented to improve the compressor efficiency. Can be.

(2nd embodiment)

Next, a second embodiment of the present invention will be described with reference to FIG. Fig. 8 is a plan view of the retainer 12 used in the discharge valve device 16 of the hermetic compressor 50 of the second embodiment of the present invention. Since this 2nd Embodiment differs from 1st Embodiment in the following point, about another point, it is basically the same as 1st Embodiment, and overlapping description is abbreviate | omitted.

In this 2nd Embodiment, the valve support part 12 of the retainer 12 is formed in the semicircle part. By this structure, high reliability with respect to the damage of the opening-closing part 9a in the valve support part 12c can be ensured.

1 is a longitudinal sectional view of a hermetic compressor of a first embodiment of the present invention;

Figure 2 is an exploded perspective view of the discharge valve device of the head structure of Figure 1;

3 is a cross-sectional view during attachment of the discharge valve device of FIG. 2;

Fig. 4 is a sectional view when the attachment of the discharge valve device of Fig. 2 is completed.

Fig. 5 is an enlarged view in section of Fig. 4;

Fig. 6 is a plan view showing a relationship between a discharge valve and a retainer of the discharge valve device of Fig. 4;

Figure 7 is a front view of the head of the discharge valve device of Figure 4;

Fig. 8 is a plan view of a retainer used for a discharge valve device of the hermetic compressor of the second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1, 25: cylinder block

1a: cylinder chamber

2: connecting rod

3: crankshaft

4: piston

5: stator

6: rotor

7: head

7a: seat surface

7b: discharge hole

7c: stopper contact

7d: recess

7f: bolt hole

8: intake valve

9: discharge valve

9a: opening and closing part

9b: middle part

9c, 11a, 12b: installation foundation

11: stopper

11b: retainer base

12: retainer

12a: elastic adjustment part

12c: Valve Support

12d: middle part

12e: free end

14: Frame

15: head cover

16: discharge valve device

17: oil supply pin

21: sealed container

22: compression element

23: electric element

24: head structure

50: hermetic compressor

Claims (8)

A compression element for compressing the refrigerant gas and a transmission element for driving the compression element are housed in a sealed container, The compression element includes a cylinder having a cylinder chamber, a piston reciprocating in the cylinder chamber, a head having a discharge hole and covering the cylinder chamber in the cylinder, and a discharge valve device; The discharge valve device includes an elongated discharge valve provided on the half cylinder side of the head, an elongated retainer provided on the half head side of the discharge valve, and a half discharge valve side of the retainer to provide the discharge valve and the retainer. With a stopper to limit the lift amount, The discharge valve includes an installation base portion, an opening and closing portion for opening and closing the discharge hole of the head, an intermediate portion for connecting the installation base portion of the discharge valve and the opening and closing portion of the discharge valve, In the sealed compressor, the retainer includes an installation base portion, a valve support portion in contact with the opening and closing portion of the discharge valve, and an intermediate portion in contact with the installation base portion of the retainer and the valve support portion of the retainer. The retainer has a free end extending from the valve support portion of the retainer to the semi-base portion side, The stopper has a free end of the retainer such that the valve support of the retainer is spaced apart from the opening and closing at the time of closing the opening and closing of the discharge valve, so that the elastic force in the discharge valve direction occurs in the valve support of the retainer. Hermetic compressor, characterized in that in contact with. According to claim 1, wherein the retainer has a mounting base portion of the retainer is formed in the granular portion, the mounting base portion of the retainer is pressed against the mounting base portion of the stopper and fixed so that the valve support portion of the retainer is separated from the opening and closing portion of the discharge valve Hermetic compressor, characterized in that maintained in the state. The said retainer is a state in which the valve support part of the said retainer is spaced apart from the said open / close part at the time of closing of the opening / closing part of the said discharge valve, The said opening-and-closing part contact | connects and the installation base part of the said retainer of Claim 1 or 2 A hermetic compressor, which is curved toward the half discharge valve with the free end of the retainer as a supporting point. The said retainer contacts the said opening-and-closing part at the time of opening of the opening-and-closing part of the said discharge valve, The said retainer makes the said supporter the installation base part of the said retainer, and the free end of the said retainer as a support point, A hermetic compressor, wherein the valve support of the retainer is deformed together with the opening and closing portion to contact the stopper. 5. The hermetic compressor according to claim 4, wherein the retainer is provided with an elastic adjuster that contacts the stopper before the valve support of the retainer deforms and contacts the stopper, thereby changing the elastic force of the retainer. A compression element for compressing the refrigerant gas and a transmission element for driving the compression element are housed in a sealed container, The compression element includes a cylinder having a cylinder chamber, a piston reciprocating in the cylinder chamber, a head having a discharge hole and installed to cover the cylinder chamber in the cylinder, and an elongated discharge provided at the half cylinder side of the head. A valve, an elongated retainer provided on the half head side of the discharge valve, and a stopper provided on the half discharge valve side of the retainer to limit the lift amount of the discharge valve and the retainer, The discharge valve includes an installation base portion, an opening and closing portion for opening and closing the discharge hole of the head, an intermediate portion for connecting the installation base portion of the discharge valve and the opening and closing portion of the discharge valve, In the sealed compressor, the retainer includes an installation base portion, a valve support portion in contact with the opening and closing portion of the discharge valve, and an intermediate portion in contact with the installation base portion of the retainer and the valve support portion of the retainer. The retainer is characterized in that the mounting base of the retainer is formed into a granular portion, and the mounting base of the retainer is pressed by the mounting base of the stopper so that the valve support of the retainer is kept spaced from the opening and closing portion of the discharge valve. Hermetic compressor. The said retainer has a free end part extended from the valve support part of the said retainer to the semi-base part side, The free end of the said retainer has the valve support part of the said retainer at the time of closing the opening-and-closing part of the said discharge valve. A hermetic compressor, wherein the stopper is in contact with the stopper so as to generate an elastic force in a discharge valve direction in a valve supporting portion of the retainer. The said retainer deform | transforms with the said opening-and-closing part by the said opening-and-closing part contacting at the time of opening of the opening-and-closing part of the said discharge valve, and making the retaining base part of the said retainer and the free end of the said retainer as a supporting point. And the lift amount is limited in contact with the stopper.

Images