CN1234970C - Valve device of sealed compressor - Google Patents

Abstract

A valve device for a hermetic compressor, comprising: a cylinder head with a groove and a valve seat, the groove has an exhaust hole and a fixing groove, and the fixing groove includes a foot fixing part and a fixing pin placement part; an exhaust valve , installed on the upper surface of the exhaust hole, one end of which has opposite legs, and the other end is installed on the upper surface; the fixed pin includes the fixed pin body and the fixed arms at both ends of the fixed pin body; the valve spring and The upper central part of the above-mentioned fixed pin body is integrally formed, extending to have an upward slope in the same direction as the above-mentioned fixed arm; the end cover; and the sealing ring are inserted between the above-mentioned cylinder head and the end cover.

Description

Hermetic Compressor Valve Assembly

technical field

The present invention relates to a valve device of a hermetic compressor, in particular to such a valve device of a hermetic compressor, which facilitates the installation of the discharge valve and the valve spring inside the groove formed on the cylinder head, and reduces the valve device. The number of parts facilitates assembly while improving compressor performance.

Background technique

When a general compressor is started, it starts to rotate under the electromagnetic action of the stator and the rotor after being energized, and the rotation of the rotor drives the crankshaft to rotate.

The piston is then driven horizontally by a connecting rod or slider that converts the vertical rotational force of the crankshaft into horizontal motion. Finally, the piston reciprocates in the cylinder.

At this time, when the piston retreats, the refrigerant enters the cylinder through the intake port and the intake valve on the cylinder head. As the piston advances, the refrigerant that enters it is compressed, passes through a discharge hole in the cylinder head, and is expelled when the discharge valve opens.

When designing the traditional valve device of the general hermetic compressor of the above working mode, people pay great attention to improving the efficiency of the compressor, so that when the linearly reciprocating piston in the cylinder reaches the top dead center, the volume in the cylinder is reduced and the cylinder is connected. The sum of the internal volumes (here referred to as "pressure point volume") of the vent holes (see below for a detailed description).

The reason is that the high-pressure refrigerant gas left in the pressure point volume expands with the retreat of the piston under the action of the suction stroke of the cylinder during the compressed gas exhaust process, which hinders the flow of refrigerant gas from the suction port. suction, which reduces the efficiency of the compressor.

Before the exhaust valve closes the exhaust hole, the above-mentioned exhaust hole formed on the cylinder head communicates with the inner space of the cylinder always.

The above-mentioned valve means used between the cylinder and end cover of conventional hermetic compressors function to draw refrigerant gas into the cylinder or expel it from the cylinder. Here, the suction valve, the cylinder head, the sealing ring and the exhaust valve are made into sheets respectively, and installed in order to form a valve device; in addition, outside the above parts, a groove is formed on the cylinder head for installing the exhaust valve and the like.

In conjunction with the previously described conventional examples of the two types of hermetic compressor valve arrangements, examples of recesses formed in the cylinder head for mounting discharge valves will be described below with reference to well-known U.S. patents.

As shown in Figure 1, according to U.S. Patent No. 4,723,896 (herein referred to as "citing technology No. 1"), the valve device cylinder head 1 of the hermetic compressor has a groove 2 for fixing the exhaust valve device .

An exhaust hole 3 is formed on the groove 2, and an exhaust valve 4 is installed on the top of the exhaust hole 3 for closing the exhaust hole 3.

A valve spring 5 is installed on the upper side of the exhaust valve 4 for resetting the exhaust valve 4 from an open state to a closed state.

The positioning seat 6 is fixed in the groove 2 of the cylinder head 1 and is connected with the valve spring 5 . At the same time, the clamp 7 is installed on the upper side of the positioning seat 6 to fix the above-mentioned components.

The above components are all located between the end cover 8 and the cylinder 9, and a sealing ring 10 is tightly fixed between the end cover 8 and the cylinder head 1 to prevent leakage of high temperature and high pressure refrigerant.

Unexplained reference numeral 9a designates a piston.

However, the hermetic compressor valve device according to Cited Art No. 1 includes many components such as a discharge valve 4, a valve spring 5, and a positioning seat 6 for fixing them. As a result, the composition of the valve device requires many parts, and the cylinder head 1 also needs to have a slit for inserting the receiving jig, so that the structure tends to be complicated and difficult to process.

Moreover, in view of the fact that the valve spring 5 is fixed with the positioning seat 6, the exhaust valve 4 can cause the shape deformation of the valve spring 5, and when the deformed valve spring 5 contacts the positioning seat 6, the positioning seat 6 is deformed. In this way, the various components cannot function normally.

Meanwhile, as shown in Figure 2, according to U.S. Patent No. 5,209,260 (herein referred to as "citing technology No. 2"), the valve device of the hermetic compressor includes a suction valve plate 17, a cylinder head 11, a discharge The valve 14, a valve spring 15, a positioning seat 16 and an end cap 18 are all sequentially connected to a cylinder (not shown).

Next, the shapes of the above components will be described in more detail.

A suction valve 17a and an injection hole 17b are formed around the middle of the suction valve plate 17 .

A groove 12 having a stepped first receptacle 12 a and a second receptacle 12 b is formed on one middle side of the cylinder head 11 .

The first receiving portion 12a is deeper than the second receiving portion 12b, and the vent hole 13 is located at the center of the first receiving portion.

Then, the exhaust valve 14 and the valve spring 15 are sequentially fixed to one side of the first receiving portion 12a. In this way, the exhaust valve 14 can be used to open/open and close the exhaust hole 13, and the valve spring 15 limits the opening/opening and closing range of the exhaust valve 14.

The opening and closing of a suction hole 11 a is controlled by a suction valve 17 a on the suction valve plate 17 , which is located on an outer side of the groove 12 .

The positioning seat 16 is fixedly installed on the second receiving portion 12b which is shallower than the first receiving portion 12a, and they are all in the groove 12 of the cylinder head 11, opposite to the upper surface of the exhaust valve 14 and the valve spring 15, These are all sequentially stacked in the groove 12 in advance.

At this time, the positioning seat 16 embedded in the second receiving portion 12b is tightly fixed on the cylinder head 11, so that the clamp mentioned in the above cited technique No. 2 is unnecessary.

Unexplained reference numeral 18 designates an end cap.

However, according to the prior art disclosed in U.S. Patent No. 5,209,260, there is a defect in the valve device of the hermetic compressor, that is, the parts installed in the step-shaped groove 12 on the cylinder head 11 are small in size but large in number, so that Assembly work is complicated.

Also, when the valve unit is actuated, since the valve spring 15 deforms upward the central shape of the positioning seat 16 fixed to the cylinder head 11, the valve spring 15 stays at a position deviated from a predetermined position. As a result, the opening or closing timing of the valve spring 14 cannot be properly adjusted to cause backflow of the compressed refrigerant and a large re-expansion loss. In this way, the efficiency of the compressor is reduced.

Referring to Fig. 3, according to U.S. Patent No. 5,328, 338 (herein referred to as " cited technology No. 3 "), there is a groove 22 of predetermined shape on the valve device cylinder head 21 of hermetic compressor, and exhaust hole 23 is positioned at groove 22 Inside.

A valve mounting plate 25 is located inside the cylinder head 21 for fixing one end of the exhaust valve 24 for opening/closing the exhaust hole 23 .

A valve spring 26 is located on the upper side of the exhaust valve 24, used to limit the opening/closing range of the exhaust valve 24, and has an upward inclination angle.

The extended part 27' of the sealing ring 27 arranged between the cylinder head 21 and the end cover 28 is located on the upper part of the exhaust valve 24 and the valve spring 26, and is fixed in the groove 22 in sequence.

An inward protrusion 30 is formed on the inner side of the end cap 28, extending toward the upper side of the extension portion 27' of the sealing ring 27. With this construction, when the end cover 28 is assembled to the cylinder head 21, the extension 27' of the gasket 27 is pressed, and the exhaust valve 24 and one end of the valve spring 26 are fixed in this manner.

More specifically, in order to fix the exhaust valve 24 and the valve spring 26 so that they remain in the normal position, the extension 27' of the sealing ring 27 is installed on the exhaust valve 24 and one end of the valve spring 26, that is, connected to the exhaust valve. The opposite end of the valve 24 covering the part of the exhaust hole 23 is compressed and fixed by the protrusion 30 of the end cap 28 .

The structure described in reference technology No. 3 is: the exhaust valve 24 and the valve spring 26 are installed in the groove 22 of the cylinder head 21, and no positioning seat is installed. Here, the end cap 28 has a protrusion 30 for fixing the valve spring 25 .

According to the compressor structure described in the cited technology No. 3, compared with the cited technology No. 1, the number of parts installed inside the groove 22 is reduced, but there are protrusions 30 in the end cover 28 instead, used to reduce The components installed in the groove 22 are used to compress and fix the exhaust valve 24 and the valve spring 26 .

When the valve device of this structure is assembled, it is necessary to install the exhaust valve 24 and the valve spring 26 in the groove 22, and then pass between the protrusion 30 in the end cover 28 and the upper part of the exhaust valve 24 and the valve spring 26. Inserting the extended portion 27' of the sealing ring 27 to connect with the cylinder head 21 is not easy to carry out the assembly process. In addition, the inward projection 30 must be precisely shaped so that the end cap 28 can be assembled accurately.

In addition, there is a positioning seat that limits the rise of the valve spring 26, which hinders the effective fixing of the valve spring 26. The rise of the valve spring 26 is not limited, and the range of rise of the valve spring 26 cannot be limited, so that the valve spring 26 Too much stress is applied to a fixed end.

Therefore, end cover 28 is pressed down tightly and is subjected to the sealing ring 27 of the effect of the power that valve spring 26 repeatedly rises to produce easily to be damaged, and valve spring 26 and exhaust valve 24 are not fixed in normal position like this.

Fig. 4 is an example of a valve device of another hermetic compressor (here referred to as "reference technology No. 4"). A suction valve, a cylinder head, a sealing ring and a discharge valve are assembled sequentially. The components are all machined into individual boards. Here, an intake valve plate 36 , a cylinder head 38 , an injection valve plate 40 , a seal ring 42 and an end cover 44 are assembled with screws 45 in sequence.

On the suction valve plate 36, a suction valve 35 of a predetermined shape and an injection hole 36a are formed.

A suction hole 38b and an exhaust hole 38a are formed in the cylinder head 38, respectively, and a suction hole 40b and an injection valve 41 of a predetermined shape are formed in the injection valve plate 40.

A sealing ring 42 is interposed between the injection valve plate 40 and the end cover 44 to prevent leakage of compressed gas.

At this time, the injection hole 36a on the intake valve 36 is located opposite to the exhaust hole 38a on the cylinder head 38, and communicates with each other.

In addition, the air intake hole 38b on the cylinder head 38, the air intake hole 40b on the injection valve plate 40, and the air intake hole 42b on the sealing ring 42 are also opposite to each other and communicate with each other.

Unexplained reference numeral 32 is a piston, and 33 is a screw for fixing the cylinder 34 .

However, according to the closed valve device of above-mentioned citation technology No. 4, the injection hole 36a and the exhaust hole 38a on the suction valve plate 36 and the cylinder head 38 constitute the valve device on one side of the cylinder 34, which seems heavy and increases Larger pressure point volume. The efficiency of the compressor is thus reduced.

Contents of the invention

It is an object of the present invention to provide a hermetic compressor valve arrangement for reducing the pressure point volume.

Another object of the present invention is to provide a hermetic compressor valve assembly with simplified assembly, mounted in a recess in the cylinder head.

Another object of the present invention is to provide a hermetic compressor valve device with easy assembly of the exhaust valve and valve spring. The exhaust valve and valve spring are installed in the groove on the cylinder head to precisely fix the exhaust valve and valve spring. The valve spring will not deviate from the normal position during the operation of the valve device.

Another object of the present invention is to provide a hermetic compressor valve device with simplified valve structure, which is installed in the groove on the cylinder head, which improves the working performance and saves the production cost.

In order to achieve the above-mentioned purpose of the present invention, the valve device of the hermetic compressor includes: a cylinder head with a groove, and an exhaust hole is arranged on the groove, and the exhaust hole is used to eject the refrigerant gas in the cylinder; The exhaust valve is installed on the upper surface of the above-mentioned exhaust hole and can be opened and closed. One end has opposite legs, and the other end is located on the upper surface of the above-mentioned exhaust hole, which can be opened or closed; the fixed pin includes a fixed The pin body and the fixed arms at both ends of the above-mentioned fixed pin body; the valve spring is integrally formed with the upper central part of the above-mentioned fixed pin body, extending to have an upward slope in the same direction as the above-mentioned fixed arm; the end cover; and

A sealing ring is inserted between the above-mentioned cylinder head and the end cover to prevent leakage of the above-mentioned refrigerant gas; it is characterized in that a fixing groove part is formed on the cylinder head, and the fixing groove part includes a foot fixing part and a slave groove The outstretched fixed pin placement part, the pin of the above-mentioned exhaust valve is inserted into the foot fixing part, the fixed pin is inserted into the fixed pin placement part, and the fixed pin fixes the exhaust valve when the end cover presses the fixed pin.

In order to achieve another object of the present invention, the valve device of the hermetic compressor includes: a cylinder head with a groove, and an exhaust hole is arranged on the groove, and the exhaust hole is used to eject the compressed refrigerant in the cylinder ; an exhaust valve with a valve fixing plate; a valve spring, the valve spring is in contact with the upper surface of the above-mentioned exhaust valve, and has a spring fixing plate; a fixing piece, the fixing piece is in contact with the upper surface of the above-mentioned spring fixing plate The compression part is used to press and fix the above-mentioned valve spring, as well as the elastic part bent from both ends of the above-mentioned compression part; the end cover, which tightly presses the elastic part of the above-mentioned fixing part by connecting with the above-mentioned cylinder head ; The sealing ring, which is inserted between the above-mentioned cylinder head and the end cover, is used to prevent the leakage of the above-mentioned refrigerant; it is characterized in that a valve seat protruding from the groove is formed on the cylinder head, and at the valve seat A fixing groove is formed, the valve fixing plate of the exhaust valve is inserted into the valve seat, the spring fixing plate of the valve spring is inserted into the valve seat and contacts the valve fixing plate, the elastic part of the fixing element is located on the valve fixing plate, and the end cover presses the fixing element .

In order to achieve another object of the present invention, the valve device of the hermetic compressor includes: a cylinder head with a groove, and an exhaust hole is arranged on the groove, and the exhaust hole is used to eject the compressed refrigerant in the cylinder ; The exhaust valve is installed on the upper surface of the above-mentioned exhaust hole and can be opened/closed; the valve spring in contact with the upper surface of the above-mentioned exhaust valve has a wing at one end, and the wings are on both sides fixed into the first valve seat part of the above-mentioned groove; the end cover, which is connected to the above-mentioned cylinder head from the upper side of the above-mentioned valve spring, and is used to fix the above-mentioned valve spring; the sealing ring, which is inserted in the above-mentioned cylinder Between the cover and the end cover, it is used to prevent the leakage of the above-mentioned refrigerant gas; it is characterized in that a first valve seat is formed on one side of the groove of the cylinder head, and a second valve seat is formed on the other side of the groove, The wings of the valve spring are inserted into the first valve seat so that the valve spring can contact the exhaust valve, the end cover presses the wings of the valve spring, and the valve spring is contacted and supported by the end cover.

Description of drawings

The above objects and advantages of the present invention will become clearer by describing the preferred embodiments in detail with reference to the accompanying drawings.

Fig. 1 is a cross-sectional view of a conventional valve device structure applied to a hermetic compressor, disclosed in U.S. Patent No. 4,723,896;

Fig. 2 is an exploded perspective view of a conventional valve device structure applied to a hermetic compressor, disclosed in U.S. Patent No. 5,209,260;

Fig. 3 is a cross-sectional view of a conventional valve device structure applied to a hermetic compressor, disclosed in U.S. Patent No. 5,328,338;

4 is an exploded perspective view of a conventional valve device structure of a hermetic compressor according to another technique;

5 is a cross-sectional view of the structure of the hermetic compressor according to the first embodiment of the present invention;

6 is an exploded perspective view of a valve device structure of a hermetic compressor according to a second embodiment of the present invention;

FIG. 7A is a plan view of an exhaust valve, which is a component of a valve device used in a second embodiment of the present invention;

Fig. 7B is a plan view of the structure of the fixed pin, which is a component of the valve device used in the second embodiment of the present invention;

7C is a cross-sectional view of the structure of a fixed pin, which is a component of the valve device used in the second embodiment of the present invention;

7D is a plan view of the structure of the cylinder head, which is a component of the valve device used in the second embodiment of the present invention;

8 is a cross-sectional view of an assembled structure of a valve device according to a second embodiment of the present invention;

9 is a perspective view of a fixed pin and a valve spring integrally formed in a valve device according to a third embodiment of the present invention;

10 is a plan view when the exhaust valve is located on the cylinder head in the valve device according to the fourth embodiment of the present invention;

11A is a cross-sectional view of a valve device structure according to a fourth embodiment of the present invention in the case of temporary installation;

11B is a cross-sectional view of a valve device structure according to a fourth embodiment of the present invention in a fully installed state;

12 is an exploded sectional view of a valve device according to a fifth embodiment of the present invention;

13 is an exploded perspective view of a valve device structure according to a sixth embodiment of the present invention;

Figure 14 is a cross-sectional view of the valve device shown in Figure 13;

Fig. 15 is a sectional view of a valve device according to a seventh embodiment of the present invention.

Detailed ways

Here, the hermetic compressor valve device according to the present invention will be described in detail, referring to the embodiment diagrams in the accompanying drawings.

As shown in Figure 5, according to the first embodiment of the present invention, the hermetic compressor valve assembly includes a cylinder head 130, a stepped groove 131 is located on the intake valve plate (not shown) on the cylinder head 130, the cylinder The cover 130 is coupled with one end of the cylinder (not shown). An exhaust valve 140 and a valve spring 150 are installed in the groove 131. After the sealing ring 134 is inserted, the end cover 160 is coupled with the cylinder head 130 .

A discharge hole 132 is formed on one side of the groove 131 of the cylinder head 130 for discharging compressed gas. A fixed end 140b of the exhaust valve 140 and a fixed end 150b of the valve spring 150 are sequentially placed on the valve seat 133 , and the valve seat 133 is located on the other side of the groove 131 .

The exhaust valve 140 is installed on the upper side of the exhaust hole 132 , its free end 140 a can open/close the exhaust hole 132 , and the fixed end 140 b is fixed on the valve seat 133 of the groove 131 .

The valve spring 150 is arranged on the upper part of the exhaust valve 140 , and the lower surface of the fixed end 150 b of the valve spring 150 is coupled with the upper surface of the fixed end 140 b of the exhaust valve 140 .

The upwardly inclined portion 151 is used to limit the movement of the exhaust valve 140 and extends to the free end 150 a of the valve spring 150 . In addition, the horizontal portion 152 is connected to one end of the upwardly inclined portion 151 while being kept in contact with the support protrusion 161 on the end cover 160, which will be described later.

The above-mentioned valve spring 150 is in contact with the discharge valve 140 from the fixed end 150b to the front of the upwardly inclined portion 151. As shown in FIG.

A sealing ring 134 is inserted between the cylinder head 130 and the end cover 160 for preventing leakage of compressed gas, and one side thereof extends to the inside of the groove 131 .

In more detail, the sealing ring 134 extends to the valve seat 133 to form a section, so that it covers the fixed ends 140b and 150b of the exhaust valve 140 and the valve spring 150, and the fixed ends 140b and 150b are sequentially installed in the groove 131 with the valve As a result, the compressed fixed end 162 of the end cover 160 presses the fixed end 150b of the valve spring 150 tightly through the sealing ring 134 .

Meanwhile, the end cover 160 is coupled with the cylinder head 130 by inserting the gasket 134 therebelow. The support protrusion 161 is located in the end cover 160 and keeps in contact with the horizontal portion 152 of the valve spring 151 , and its function is to limit the lift of the valve spring 150 .

As long as the lift of the valve spring 150 can be restricted, any shape of the supporting protrusion having the above function can be used.

The compression fixing part 162 is located on the inner plane of the end cover 160, and its function is to compress and fix the fixed ends 140b and 150b of the exhaust valve 140 and the valve spring 150 when the sealing ring 134 is inserted to couple the end cover 160 with the cylinder head 130 , the fixed ends 140b and 150b are installed on the valve seat 133 in the groove 131 .

On the other hand, when the exhaust valve 140 and the valve spring 150 are sequentially installed on the valve seat 133 in the groove 131 , the upper surface of the valve spring 150 is higher than the upper surface of the cylinder head 130 .

Its purpose is that when the valve device is assembled, when the sealing ring 134 is inserted, the compression fixing part 162 tightly presses the fixed end 150b of the valve spring 150, thereby firmly fixing the exhaust valve 140 and the valve spring 150.

According to the first embodiment of the present invention, the structure of the above-mentioned hermetic compressor valve device is: when the exhaust valve 140 rises, the gas compressed in the compressor cylinder is discharged through the exhaust hole 132 .

At this time, the opening/closing range of the exhaust valve 140 is limited by the valve spring 150 , and the rising range of the valve spring 150 is limited by the support protrusion 161 on the inner surface of the end cover 160 .

During the operation of the above-mentioned valve device, the exhaust valve 140 and the valve spring 150 are fixed by the compressed and fixed part 162 of the end cover 160, and their positions will not change, thereby ensuring the reliability of the device.

According to the first embodiment of the present invention, the structure of the valve device of the hermetic compressor is as follows: the supporting protrusion limiting the rising range of the valve spring is integrally formed with the compression and fixing part fixing the exhaust valve and the valve spring, and is located on the inner surface of the end cover. Thus, the number of components constituting the valve unit is reduced, the workability of the assembly work is improved, and the production cost is reduced.

Meanwhile, as shown in FIG. 6, according to the second embodiment of the present invention, the hermetic compressor valve device includes: a cylinder head 220, which is connected to the suction valve plate 206 installed on the cylinder 204; an exhaust valve 230; A fixing pin 240 ; a sealing ring 250 and an end cover 214 , these components are stacked on the cylinder head 220 in sequence.

A groove 221 is formed in the cylinder head 220 . As shown in FIG. 7D , a vent hole 220 a is formed on one side of the groove 221 , and a fixing groove 224 is formed on the other side of the groove 221 .

Fixing groove 224 has an elongated pin fixing section 225 to be used for laying the fixing pin 232 and 232 ' of exhaust valve 230, will describe this point later, another rectangular fixing pin laying section 226 is used for laying fixing pin 240.

A suction hole 220b is formed on one side of the cylinder head 220, and its opening and closing are controlled by the suction valve 205 on the suction valve plate 206.

As shown in FIG. 7A, the feet 232 and 232' in the foot fixing section 225 placed in the groove 221 extend oppositely at one end of the exhaust valve 230. In addition, a valve opening/closing section 232 of a predetermined shape is formed on the row. The other end of the gas valve 230 is used to open/close the exhaust hole 220a.

The installation method of the above-mentioned exhaust valve 230 is: the valve opening/closing section 231 is placed on the exhaust hole 220a in the groove 221, and the feet 232 and 232' are placed in the foot fixing section 225.

As shown in Figures 7B and 7C, the fixing pin 240 includes a fixing pin body 241, and fixing arms 242 and 242' located at two ends of the pin body 241 are parallel to each other in the same direction.

The arcuate elastic bends 243 and 243' are located at the center of the fixed arms 242 and 242'. In this way, as shown in Figure 8, when the valve assembly is assembled, the fixed arms 242 and 242' will be assembled higher than the surface of the cylinder head 220, so that the end cover 214 can press the arcuate elastic elbows 243 and 243', thereby The exhaust valve 230 can be fixed.

The fixed arms 242 and 242' are inserted into the side wall of the fixed pin placement section 226 and fixed, the fixed pin placement section 226 is formed in the groove 221, and the pin body 241 of the fixed pin 240 is located at the fixed feet 232 and 232' of the exhaust valve 230 to secure the exhaust valve 230.

Unexplained reference numeral 227 is a screw hole for inserting the fixing screw 215 , and 250 b is a suction hole penetrating through the sealing ring 250 .

According to the second embodiment of the present invention, the assembly structure of the above-mentioned hermetic compressor valve device is: the fixed pin 240 is used to fix the exhaust valve 230 on the inner groove 221 of the cylinder head 220, and the cylinder head 220 is installed on the cylinder 204 The suction valve plate 206 on one side is connected, and the sealing ring 250 is inserted here and then connected with the end cover 214 .

More specifically, the feet 242 and 242' of the exhaust valve 230 are placed in the foot fixing section 225 of the fixing groove 224, and the fixing groove 224 is located on one side of the groove 221 in the cylinder head 220. The pin body 241 of the fixing pin 240 is arranged on the feet 242 and 242', so that the fixing arms 242 and 242' are inserted into the fixing pin placement section 226, thereby fixing the exhaust valve 230.

In the above state, the end cover 214 and the cylinder head 220 are assembled and connected by inserting the sealing ring 250 therebetween.

Here, the exhaust valve 230 is compressed by the end cover 214 pressing the bow-shaped elastic joints 243 and 243' of the fixing pin 240, so that the exhaust valve 230 is tightly fixed on the groove 221.

According to the third embodiment of the present invention, as shown in Figure 9, the valve spring 264 in the valve device is integrally formed with a fixed pin 260, and the shape of the fixed pin 260 is the same as that of the fixed pin 240 in the second embodiment of the present invention, and can be used for The exhaust valve 230 is fixed and the lift of the exhaust valve 230 is limited.

The fixing pin 260 used in the third embodiment of the present invention has fixing arms 262 and 262' extending from both ends of the pin body 261 in the same direction. A valve spring 264 is located at the center of the pin body 261 of the fixed pin 260, extends in the same direction as the fixed arms 262 and 262', and is inclined upward while approaching the free end.

The method of using the fixing pin 260 integrally formed with the valve spring 264 to fix the exhaust valve 23 is the same as the method of using the fixing pin 240 in the valve device of the second embodiment of the present invention, which is omitted here.

According to the second and third embodiments of the present invention, the structure of the valve device is as follows: a groove is formed in the cylinder head, and the exhaust hole is formed in the groove. In this way, the pressure point volume is reduced, improving the efficiency of the compressor. In addition, a fixing pin with a simple structure is used to firmly fix the exhaust valve installed in the groove.

Referring to Fig. 10, according to a fourth embodiment of the present invention, a hermetic compressor valve assembly includes a cylinder head 320 mounted on a suction valve plate (not shown), the suction valve plate and a cylinder (not shown) It also includes an exhaust valve 330, a valve spring 335 and a fixing piece 340, which are installed inside the groove 321 on the cylinder head 320.

Fixing grooves 325, 325' and a valve seat 324 are formed on one side of the groove 321 on the cylinder head 320.

The exhaust hole 330 , the valve spring 335 and the fixing piece 340 are sequentially stacked in the groove 321 on the cylinder head 320 .

A valve fixing plate 331 disposed on the valve seat 324 is integrally formed with one end of the exhaust valve 330 for opening/closing the exhaust hole 322 in the groove 321 .

The valve spring 335 is in contact with the upper surface of the exhaust valve 330 to limit the rise of the exhaust valve 330. One end of the valve spring 335 corresponding to the valve fixing plate 331 installed on the valve seat 324 is integrally formed with a spring fixing plate 336 .

As a result, inside the groove 321 , when the valve spring 335 is mounted on the upper portion of the exhaust valve 330 , the spring fixing plate 336 is also located on the upper portion of the valve fixing plate 331 of the exhaust valve 330 .

The fixing part 340 is used to pressurize the spring fixing plate 336 above the valve fixing plate 331, including a lowered compression part 342 in the middle, used to pressurize and fix the spring fixing plate 336, and also includes curved elastic parts 341 and 341 on both sides of the compression part 342 ', the elastic portions 341 and 341' are respectively inserted into the fixing grooves 325 and 325'.

The ends of the resilient portions 341 and 341' extend downwardly longer than the compressive portion 342 so as to be inserted into the retaining slots 325 and 325' when the valve assembly is fully assembled.

Unexplained reference numeral 323 is a suction hole, and 328 is a screw hole for fixedly receiving a screw for connecting the valve unit.

According to the fourth embodiment of the present invention, the above-mentioned hermetic valve device structure is assembled in the following order.

First, one end of the exhaust valve 330 is placed in the groove 321 on the cylinder head 320 , and the fixing plate 331 of the exhaust valve 330 is fixed on the valve seat 324 .

Then, when the valve spring 335 is installed on the top of the exhaust valve 330, the lower surface of the compression part 342 of the fixing member 340 is in contact with the upper surface of the valve fixing plate 331 of the exhaust valve 330 and the spring fixing plate 336 of the valve spring 335. , These are sequentially installed on the valve seat 324, and the fixing feet 341 and 341' are inserted into the two end walls of the valve seat 324 using elasticity, thereby temporarily installing these components as shown in FIG. 11A.

Then, under the provisionally assembled condition, the seal ring 351 and the end cover 350 are sequentially stacked on the cylinder head plate 327 to be connected thereto.

At this time, the upper surfaces of the elastic members 341 and 341' are higher than the cylinder head plane 327 under the provisional assembly condition. However, as shown in Figure 11B, once the sealing ring 351 and the end cover 350 are connected to complete the assembly, the elastic parts 341 and 341' of the fixing member 340 are inserted into the fixing grooves 325 and 325' at both ends of the valve seat 324, so that the exhaust air Valve 330 is just fixed with valve spring 335 completely.

According to the fourth embodiment of the present invention, the above-mentioned valve device is structured such that the exhaust valve and the valve spring can be assembled when temporarily assembled by means of a fixing member. Also, when fully assembled, the exhaust valve and the valve spring can be tightly pressed and fixed by means of the fixing piece. Therefore, when the exhaust valve and the valve spring are installed in the correct position without changing their position, the valve unit can be activated.

A valve arrangement of a hermetic compressor according to a fifth embodiment of the present invention is shown in FIG. 12 .

Compared with the fourth embodiment, the fifth embodiment of the present invention additionally has a fixed protrusion 426 protruding from the valve seat 424 and fixed small holes 432 and 437, which are position fixing components and pass through a valve spring 435 respectively in turn. The spring fixing plate 436 corresponds to the fixing protrusion 426 . In addition, embossing 443 as a fixing member is located on the compressed portion 442 of the fixing member 440 .

Although not shown separately as a drawing, the sixth embodiment of the present invention has a position fixing member corresponding to the fixing protrusion on the valve seat, that is, embossing, formed on the valve fixing plate, the spring fixing plate of the valve spring and the fixing on the compressed part of the piece.

According to the fourth to sixth embodiments of the present invention, in view of the simple structure of the valve device of the hermetic compressor, the position of the discharge valve or the valve spring will not change during operation, thus reducing the energy consumed by using compressor products, Improved compressor efficiency.

According to the seventh embodiment of the present invention, referring to FIG. 13 , in the valve device of the hermetic compressor, a groove 532 is formed around the center of the cylinder head 531 , and an exhaust hole 533 is formed in the center of the groove 532 .

An exhaust valve 534 is installed on the upper side of the exhaust hole 533. In addition, as shown in FIG. The open position and closure of the control exhaust valve 534 .

A wing is formed on both sides of one end of the valve spring 535, and another predetermined inclination angle θ of the valve spring 535 is inclined upward, so that when the exhaust valve 534 starts to open, a predetermined elastic force acts on the exhaust valve 534 regardless of the valve spring 535. lack of force.

The groove 532 has a first valve seat portion 532a for fixing the valve spring 535 and a second valve seat portion 532b for fixing the exhaust valve 534 at the same height as the exhaust hole 533 .

With this structure, when the wing portion 535a of the valve spring 535 is mounted on the first valve seat portion 532a before the end cover 538 is assembled, the valve spring 535 is fixedly supported by the end cover 538.

When the seal ring 540 for preventing refrigerant gas leakage is placed on the upper surface of the wing portion 535a of the valve spring 535 to assemble the cylinder head 531 and the end cover 538, the seal ring 540 is pressed tightly by the end cover 538, This itself has a force acting on the valve spring 535 to counteract the effect of airtightness, and one side of the valve spring 535 and the exhaust valve 534 is fixedly supported.

According to the seventh embodiment of the present invention, the structure of the above-mentioned valve device is: the wing portion 535a of the valve spring 535 is fixed on the first valve seat part 532a, and the valve seat 532a is formed in the groove 532 on the cylinder head 531, so that the valve The spring 535 is positioned on the cylinder head 531, where the seal ring 540 is also located. Then, the end cover 538 is connected and assembled with the cylinder head 531 .

Here, since the first valve seat part 532a formed in the groove 532 is higher than the second valve seat part, the second valve seat part is the other bottom of the groove 532, when the end cover 538 is inserted through the sealing ring 540 and When the cylinder head 531 was connected, the exhaust valve 534 could be fixed tightly with the valve spring 535 by means of the pressing force of the end cover 538.

According to the above-mentioned seventh embodiment of the present invention, in the valve device of the hermetic compressor, the discharge valve and the valve spring are tightly fixed to each other, preventing the refrigerant from flowing back and reducing the pressure point volume space.

In addition, the spring body portion of the valve spring is bent upward at a predetermined inclination angle, so that when the exhaust valve starts to open, the force acting on the valve spring is reduced. As a result, the elastic restoring force of the valve spring can be continuously maintained for a long period of time, thereby accurately realizing the opening/closing action of the exhaust valve.

As shown in FIG. 15, the eighth embodiment of the present invention is characterized in that: as a supplement to the structure of the seventh embodiment, a sealing ring 640' is inserted between the valve spring 635 and the exhaust valve 634.

In the eighth embodiment of the present invention described above, the space between the valve spring 635 and the exhaust valve 634 is enlarged due to the insertion of the seal ring 640'. For this reason, it is preferable to use the valve spring 635 to function more efficiently by sloping the valve spring 635 downward.

As described above, according to the present invention, the hermetic compressor valve arrangement can reduce the pressure point volume of the compressor to improve efficiency. In addition, the number of parts constituting the valve device is reduced, the processability in the assembly process is improved, and the production cost is saved.

Furthermore, according to the present invention, the hermetic compressor valve unit securely holds the discharge valve and the valve spring in the correct position. In this way, the position of the exhaust valve or the valve spring will not change during the operation of the valve device, which improves the efficiency of the compressor and reduces the energy consumption of the product after the compressor is adopted.

By referring to the detailed examples, when the present invention has been shown and described in detail, those skilled in the art will understand that without changing the spirit and scope of the present invention defined by the appended claims, any form and content All changes are achievable.

Claims (13)

1. the control valve unit of a closed-type compressor comprises:

The cylinder head that has groove has exhaust port on the groove, exhaust port is used for the refrigerant gas in the cylinder is ejected;

Outlet valve is installed in the upper surface of above-mentioned exhaust port, can opening and closing, and the one end has the opposite shank of direction each other, and the other end is positioned at the upper surface of above-mentioned exhaust port, can open or close;

Fixing pin comprises the fixedly fixed arm at shank and said fixing shank two ends place;

The top core of valve spring and said fixing shank is integrally formed, extends into to have the rake that makes progress with the same direction of said fixing arm;

End cap; With

Seal ring is inserted between above-mentioned cylinder head and the end cap, is used for preventing sewing of above-mentioned refrigerant gas;

It is characterized in that, on cylinder head, form the fixed groove part, this fixed groove partly comprises the pin fixing part and lays portion from the fixing pin that groove stretches out, the pin of above-mentioned outlet valve inserts in the pin fixing part, fixing pin inserts fixing pin and lays in the portion, the fixing described outlet valve of fixing pin when end cap is pushed down fixing pin.

2. valve apparatus of hermetic type compressor as claimed in claim 1, the fixed arm that it is characterized in that the said fixing pin is by being fixed in the sidewall that is inserted into the fixing pin seating part in the above-mentioned groove, the said fixing shank is placed in the pin top of above-mentioned outlet valve, is used for fixing above-mentioned outlet valve.

3. valve apparatus of hermetic type compressor as claimed in claim 1 is characterized in that the center protrusion of an arc elastic bending part from the fixed arm of said fixing pin.

4. the control valve unit of a hermetic type compressor comprises:

The cylinder head that has groove has exhaust port on the groove, exhaust port is used for the compression refrigerant in the cylinder is ejected;

The outlet valve that has the valve fixed plate;

Valve spring, this valve spring contacts with the upper surface of above-mentioned outlet valve, and has the spring fixed plate;

Fixed block, this fixed block have and the contacted compression member of above-mentioned spring fixed plate upper surface, are used for being fixed above-mentioned valve spring, also have the elastic part from above-mentioned compression member bending two ends;

End cap, this end cap are pushed down the elastic part of above-mentioned fixing piece tightly by being connected with above-mentioned cylinder head;

Seal ring, the sealing circle is inserted between above-mentioned cylinder head and the end cap, is used for preventing sewing of above-mentioned refrigerant;

It is characterized in that, on cylinder head, form the valve seat that stretches out from groove, form fixed groove at the valve seat place, the valve fixed plate of outlet valve inserts in the valve seat, the spring fixed plate of valve spring inserts in the valve seat and contacts with the valve fixed plate, and the elastic component of fixed element is positioned on the valve fixed plate, and end cap is pushed down fixed element.

5. ask 4 described valve apparatus of hermetic type compressor as right, it is characterized in that the end of above-mentioned elastic part extends far than above-mentioned compression member downwards.

6. valve apparatus of hermetic type compressor as claimed in claim 4, it is characterized in that a fixed salient that is used for fixing above-mentioned outlet valve and valve spring position forms in a said fixing side partly, position fixing apparatus forms in the relevant portion with the corresponding above-mentioned outlet valve of said fixing protuberance, valve spring and fixed component.

7. valve apparatus of hermetic type compressor as claimed in claim 6 is characterized in that position fixing apparatus is fixing aperture, runs through above-mentioned outlet valve and valve spring respectively, and an embossing forms on the above-mentioned fixing piece.

8. valve apparatus of hermetic type compressor as claimed in claim 6 is characterized in that position fixing apparatus is embossing, is formed separately in above-mentioned outlet valve, valve spring and fixed block.

9. the control valve unit of a closed-type compressor comprises:

The cylinder head that has groove has exhaust port on the groove, exhaust port is used for the compression refrigerant in the cylinder is ejected;

Outlet valve, this outlet valve is installed in the upper surface of above-mentioned exhaust port, can opened/closed;

With the contacted valve spring of the upper surface of above-mentioned outlet valve, an end has an alar part, and alar part is fixed in first valve seat part of above-mentioned groove in its both sides;

End cap, this end cap is connected with above-mentioned cylinder head from the upside of above-mentioned valve spring, is used for fixing above-mentioned valve spring;

Seal ring, the sealing circle is inserted between above-mentioned cylinder head and the end cap, is used for preventing sewing of above-mentioned refrigerant gas;

It is characterized in that, side at the groove of cylinder head forms first valve seat, forms second valve seat at the opposite side of groove, and the alar part of valve spring is inserted into valve spring can be contacted with outlet valve, end cap is pushed down the alar part of valve spring, and valve spring is supported by the end cap contact.

10. valve apparatus of hermetic type compressor as claimed in claim 9 is characterized in that the spring body of above-mentioned valve spring is oblique with a pre-determined tilt angle lapping.

11. hermetic compressor control valve unit as claimed in claim 9 is characterized in that above-mentioned seal ring is inserted between above-mentioned valve spring and the end cap.

12. valve apparatus of hermetic type compressor as claimed in claim 10 is characterized in that valve spring is downward-sloping.

13. valve apparatus of hermetic type compressor as claimed in claim 11 is characterized in that above-mentioned seal ring is inserted between above-mentioned valve spring and the outlet valve.

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