JP2008082261A - Hermetic compressor - Google Patents

Abstract

Provided is a highly efficient compressor having high reliability that does not cause a failure such as breakage or abnormal wear even when a large amount of refrigerant or oil in a liquid state flows from a cooling system.
Both ends of a stopper 130 are held by a valve plate 113 and have elasticity with respect to the valve plate 113. Therefore, even if liquid compression occurs, the stopper 130 is elastically deformed in the direction opposite to the cylinder 110. Therefore, the refrigerant 109 and the oil 104 in the liquid state are easily discharged, and an excessive increase in the internal pressure of the cylinder 110 is prevented, thereby reducing excessive stress on the components of the compression mechanism 108 and preventing breakage or abnormal wear.
[Selection] Figure 3

Description

  The present invention relates to an improvement in a discharge valve device of a hermetic compressor mainly used in a refrigerator-freezer.

  A conventional hermetic compressor is provided with a discharge valve device that improves energy efficiency by reducing noise during operation and by fixing both ends of the stopper to reduce variation in stopper height (for example, Patent Document 1).

  Hereinafter, the conventional hermetic compressor will be described with reference to the drawings.

  9 is a sectional view of a conventional hermetic compressor, FIG. 10 is a plan view of the conventional hermetic compressor, FIG. 11 is an exploded view of a discharge valve device of the conventional hermetic compressor, and FIG. It is side surface sectional drawing of the discharge valve apparatus of a compressor.

  9, 10, 11, and 12, the hermetic container 1 includes a discharge pipe 2 and a suction pipe 3 connected to a cooling system (not shown), and stores oil 4 at the bottom and a stator. The electric element 7 including the rotor 5 and the rotor 6 and the compression mechanism 8 driven by the electric element 7 are accommodated, and the inside is filled with the refrigerant 9.

  Next, the main configuration of the compression mechanism 8 will be described.

  The cylinder 10 includes a substantially cylindrical compression chamber 11 and a bearing portion 12. The valve plate 13 includes a discharge valve device 14 on the side opposite to the cylinder 10 and closes the compression chamber 11. The head 15 covers the valve plate 13. One end of the suction muffler 16 opens into the sealed container 1, and the other end communicates with the compression chamber 11. The crankshaft 17 has a main shaft portion 18 and an eccentric portion 19, and is supported by the bearing portion 12 of the cylinder 10 and the rotor 6 is press-fitted and fixed. The piston 20 is inserted into the compression chamber 11 so as to be slidable back and forth, and is connected to the eccentric portion 19 by a connecting rod 21.

  Next, the discharge valve device 14 provided in the compression mechanism 8 will be described.

  The valve plate 13 is provided with a horizontally long recess 22 on the side opposite to the cylinder 10, a discharge hole 23 communicating with the cylinder 10 at the bottom of the recess 22, and a valve seat portion 24 formed so as to surround the discharge hole 23. A pedestal portion 25 formed on substantially the same plane as the seat portion 24 is provided.

  The discharge lead 26 is made of a tongue-shaped leaf spring material and includes an opening / closing portion 27 that opens and closes the valve seat portion 24.

  The spring lead 28 is made of a tongue-shaped leaf spring material and includes a movable portion 29.

  The stopper 30 includes a stopper holding portion 31 that fixes both ends of the stopper 30 and a restriction portion 32 that restricts the movement of the discharge lead 26.

  The discharge lead 26 and the spring lead 28 are arranged in this order on the bottom of the concave portion 22, and both ends of the stopper 30 are fixed by two fixing pins 33.

  The operation of the hermetic compressor configured as described above will be described below.

  When electricity is supplied to the electric element 7, the rotor 6 rotates and the crankshaft 17 is driven to rotate. At this time, the eccentric rotational movement of the eccentric portion 19 is transmitted to the piston 20 via the connecting rod 21, so that the piston 20 reciprocates in the compression chamber 11.

  As the piston 20 reciprocates, the refrigerant 9 in the sealed container 1 is sucked into the compression chamber 11 from the suction muffler 16, and the low-pressure refrigerant 9 passes through the suction pipe 3 from the cooling system (not shown). 1 flows in. The refrigerant 9 sucked into the compression chamber 11 is compressed and discharged into the head 15 through the discharge valve device 14 of the valve plate 13. Further, the high-pressure gas discharged into the head 15 is discharged from the discharge pipe 2 to a cooling system (not shown).

  At this time, the discharge valve device 14 communicates the inside of the compression chamber 11 and the head 15 through the discharge hole 23 when the discharge lead 26 is opened, and seals the inside of the compression chamber 11 and the head 15 when the discharge lead 26 is closed. A predetermined opening / closing operation is performed.

Further, since both ends of the stopper 30 are fixed by the fixing pins 33, the variation in the space height between the discharge lead 26 and the stopper 30 can be reduced, and a predetermined space height can be obtained. Efficiency can be improved.
JP 2003-301775 A

  However, in business applications where the amount of refrigerant filled is very large, a large amount of liquid refrigerant 9 or oil 4 flows from the suction pipe 3 into the sealed container 1 from the low pressure side of the cooling system, and these liquid refrigerants 9 or oil 4 is directly sucked into the suction muffler 16, flows into the cylinder 10 and is compressed by the piston 20, and liquid compression occurs in the cylinder 10.

  When liquid compression or the like occurs, a strong load is applied to the restricting portion 32 of the stopper 30 from the opening / closing portion 27 of the discharge lead 26 via the spring lead 28 due to the high-density refrigerant 9 in the liquid state. Since 31 is fixed to the valve plate 13 by a fixing pin 33, the stopper 30 does not come off.

  In other words, the discharge amount of the liquid refrigerant 9 and oil 4 is restricted by the restriction portion 32 of the stopper 30 and the internal pressure of the cylinder abnormally rises, so that excessive stress is applied to the components of the compression mechanism 8, causing damage and abnormal wear. This could cause a malfunction.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a highly reliable hermetic compressor in which liquid refrigerant 9 and oil 4 are easily discharged.

  In order to solve the above conventional problems, in the hermetic compressor of the present invention, since the stopper has elasticity with respect to the valve plate, the stopper is elastically deformed in the anti-cylinder direction when liquid compression occurs. Therefore, the liquid refrigerant 9 and the oil 4 are easily discharged.

  The hermetic compressor of the present invention provides a highly reliable hermetic compressor because the refrigerant 9 and the oil 4 in a liquid state are easily discharged and excessive stress on the components of the compression mechanism can be reduced. Can do.

  The invention according to claim 1 includes a cylinder in which a piston reciprocates, a valve plate that seals an open end of the cylinder and includes a discharge valve device on the non-cylinder side, and the discharge valve device includes: A discharge hole communicating with the inside of the cylinder and a valve seat portion provided outside the discharge hole are formed on the valve plate. The discharge lead is made of a leaf spring material and opens and closes the valve seat portion. The stopper is disposed on the side opposite to the valve plate and restricts the movement of the discharge lead. Both the stoppers are held by the valve plate and have elasticity with respect to the valve plate. When this happens, the stopper is elastically deformed in the anti-cylinder direction, so liquid refrigerant and oil are easily discharged, and excessive stress on the components of the compression mechanism can be reduced. It is possible to provide a highly reliable hermetic compressor since come.

  The invention according to claim 2 is the invention according to claim 1, wherein both ends of the stopper are held by the valve plate via the elastic material. When liquid compression occurs, the elastic material is made of an elastic material. By moving in the anti-cylinder direction due to elasticity, the stopper also moves simultaneously. Therefore, in addition to the effect of the invention of claim 1, it is possible to provide a hermetic compressor with higher reliability and higher productivity. it can.

  The invention according to claim 3 is the invention according to claim 2, wherein a spring is sandwiched between the head of the fixing pin fixed to the valve plate and at least one end of the stopper, and the liquid compression is performed. 3. When this occurs, the spring is contracted by the elasticity of the spring, so that the stopper further moves in the anti-cylinder direction, and when returning to the state of compressing the normal gas refrigerant, the spring returns to the initial shape state. In addition to the effects of the invention, it is possible to provide hermetic compression with improved efficiency.

  The invention according to claim 4 is the invention according to claim 1, wherein the stopper is formed of a leaf spring material, and when liquid compression occurs, it is further elastically deformed in the anti-cylinder direction due to the spring property of the stopper, In addition to the effect of the invention according to claim 1, since the stopper returns to the initial shape at the same time when the normal gas refrigerant is returned to the compressing state, a more reliable and inexpensive hermetic compressor is provided. Can do.

  The invention according to claim 5 is the invention according to claim 4, wherein both ends of the stopper are held on the valve plate by fixing pins fixed to the valve plate, and at least one end of the stopper is the head of the fixing pin. Is held so as to be movable in the longitudinal direction between the valve plate and the valve plate.When liquid compression occurs, the stopper moves in the longitudinal direction starting from one end of the stopper and further bends in the anti-cylinder direction. In addition to the effect of the invention of the fourth aspect, a highly reliable hermetic compressor can be provided.

(Embodiment 1)
1 is a cross-sectional view of a hermetic compressor according to Embodiment 1 of the present invention, FIG. 2 is a plan view of the hermetic compressor according to the same embodiment, and FIG. 3 is an exploded view of a discharge valve device according to the same embodiment. FIG. 4 is a side sectional view of the same embodiment.

  1, 2, 3, and 4, the sealed container 101 includes a discharge pipe 102 and a suction pipe 103 that are connected to a cooling system (not shown), and stores oil 104 at the bottom and a stator 105. And an electric element 107 including the rotor 106 and a compression mechanism 108 driven by the electric element 107 are accommodated, and the inside is filled with the refrigerant 109. The refrigerant 109 is preferably a refrigerant 109 other than the specific chlorofluorocarbon target corresponding to environmental problems in recent years, such as R134a or R600a which is a natural refrigerant.

  Next, the main configuration of the compression mechanism 108 will be described.

  The cylinder 110 includes a substantially cylindrical compression chamber 111 and a bearing portion 112. The valve plate 113 includes a discharge valve device 114 on the side opposite to the cylinder 110 and closes the compression chamber 111. The head 115 covers the valve plate 113. One end of the suction muffler 116 opens into the sealed container 101 and the other end communicates with the compression chamber 111. The crankshaft 117 has a main shaft portion 118 and an eccentric portion 119, is supported by the bearing portion 112 of the cylinder 110 and is press-fitted and fixed to the stator 105. The piston 120 is inserted into the compression chamber 111 so as to be slidable back and forth, and is connected to the eccentric portion 119 by a connecting rod 121.

  Next, the discharge valve device 114 provided in the compression mechanism 108 will be described.

  The valve plate 113 is provided with a horizontally elongated recess 122 on the side opposite to the cylinder 110, a discharge hole 123 communicating with the cylinder 110 at the bottom of the recess 122, and a valve seat portion 124 formed so as to surround the discharge hole 123. The seat part 124 and the base part 125 formed on substantially the same plane are provided.

  The discharge lead 126 is made of a tongue-shaped leaf spring material and includes an opening / closing portion 127 that opens and closes the valve seat portion 124.

  The spring lead 128 is made of a tongue-shaped leaf spring material and includes a movable portion 129.

  The stopper 130 is formed by pressing a mild steel material, and the stopper holding portions 131 formed at both ends of the stopper 130 and fixed to the valve plate 113 and the discharge lead 126 come into contact with each other to regulate the movement thereof. Part 132.

  A discharge lead 126 and a spring lead 128 are arranged in this order on the bottom of the recess 122, and both ends of the stopper 130 are held by the valve plate 113.

  The stopper 130 is elastically inserted and fixed to the valve plate 113 by holding a spring 135 as an elastic body between the stopper holding portion 131 and the head 134 of the fixing pin 133 fixed to the valve plate 113. Has been.

  The operation and action of the hermetic compressor configured as described above will be described below.

  When electricity is supplied to the electric element 107, the rotor 106 rotates and the crankshaft 117 is driven to rotate. At this time, the eccentric rotational motion of the eccentric portion 119 is transmitted to the piston 120 via the connecting rod 121, so that the piston 120 reciprocates in the compression chamber 111.

  As the piston 120 reciprocates, the refrigerant 109 in the sealed container 101 is sucked into the compression chamber 111 from the suction muffler 116, and the low-pressure refrigerant 109 passes through the suction pipe 103 from the cooling system (not shown). 101 flows in. The refrigerant 109 sucked into the compression chamber 111 is compressed and discharged into the head 115 through the discharge valve device 114 of the valve plate 113. Further, the high-pressure refrigerant 109 gas discharged into the head 115 is discharged from the discharge pipe 102 to a cooling system (not shown).

  At this time, the discharge valve device 114 causes the inside of the compression chamber 111 and the head 115 to communicate with each other through the discharge hole 123 when the discharge lead 126 is opened, and the inside of the compression chamber 111 and the head 115 is sealed by closing the discharge lead 126. Opening and closing operations are performed.

  Further, since both ends of the stopper 130 are held, the variation in the space height between the discharge lead 126 and the stopper 130 can be reduced, and a predetermined space height can be obtained, thereby improving the efficiency. be able to.

  Here, in business applications where the amount of refrigerant enclosed is very large, a large amount of liquid refrigerant or oil 104 is returned from the external cooling circuit (not shown) through the suction pipe 103 at the start of the compressor. May come. At this time, a large amount of the refrigerant 109 and oil 104 in the liquid state are sucked into the cylinder 110 from the suction muffler 116.

  Further, while the compressor is stopped, the liquid refrigerant 109 is dissolved in the oil 104 in the sealed container 101. However, when a large amount of the refrigerant 109 is dissolved, a forming phenomenon occurs due to the decompression in the sealed container 101 when the compressor is started. May occur. The foam generated at this time rises in the space between the sealed container 101 and the electric element 107 and between the sealed container 101 and the compression mechanism 108. In many cases, the foam is sucked into the cylinder 110 from the suction muffler 116. .

  When such a liquid or a refrigerant 109 gas mixed with the liquid flows into the cylinder 110 and is compressed by the piston 120, a so-called liquid compression phenomenon occurs in which the internal pressure of the cylinder 110 is abnormally increased. Excessive stress may be generated in the product, causing failure such as breakage or abnormal wear.

  However, according to the present embodiment, since the stopper holding portion 131 is held by the valve plate 113 via the elastic material, the elastic material can move in the direction opposite to the cylinder 110 due to the elasticity of the elastic material, so that the stopper 130 can be moved. Are also moved at the same time, so that when liquid compression occurs, a strong load is applied to the regulating portion 132 of the stopper 130 from the opening / closing portion 127 of the discharge lead 126 through the spring lead 128 by the high-density liquid refrigerant 109 and oil 104. However, since the stopper 130 moves in the anti-cylinder 110 direction, the spatial distance between the opening / closing portion 127 of the discharge lead 126 and the restricting portion 132 of the stopper 130 increases.

  As a result, the refrigerant 109 and the oil 104 in the liquid state are easily discharged, and an abnormal increase in the internal pressure of the cylinder 110 can be reduced, so that excessive stress on the components of the compression mechanism 108 can be reduced.

  Therefore, by preventing abnormal wear or the like of the sliding portion due to liquid compression, it is possible to provide a highly reliable hermetic compressor that is less prone to failure.

  Further, since the elastic material does not break for a long time while maintaining sufficient elasticity, a more reliable hermetic compressor can be provided.

  In addition, since the assembly is only via the elastic material, the productivity is good with only a slight increase in the number of processes.

  Further, since the spring 135 is sandwiched between the head 134 of the fixing pin 133 fixed to the valve plate 113 and at least one of the stoppers 130, the stoppers 130 can be quickly moved in the direction opposite to the cylinder 110 by the elasticity of the springs 135. Therefore, since the spatial distance between the opening / closing part 127 of the discharge lead 126 and the restriction part 132 of the stopper 130 is smoothly expanded, the impact force of the liquid refrigerant 109 and oil 104 can be attenuated and reduced by the elasticity of the spring 135. When the normal refrigerant 109 gas is compressed, the spring 135 quickly returns to the initial shape.

  Therefore, it is possible to provide a hermetic compressor that is less likely to fail even when liquid compression occurs, is more reliable, and has improved efficiency.

  Furthermore, since the stopper 130 is formed by pressing, the height of the space between both ends of the stopper 130 and the restricting portion 132 is directly reflected by the pressing accuracy. Usually, since the dimensional accuracy of the press is controlled at several tens of micrometers or less, each surface of the stopper 130 is not particularly required to be processed, and can be obtained with high dimensional accuracy, with high production efficiency, stable quality and low cost. Can be manufactured.

  In this embodiment, the spring 135 is exemplified as the elastic material. However, even if a wave washer, a spring washer, a disc spring washer, or the like is used, a considerable effect can be obtained.

(Embodiment 2)
5 is a cross-sectional view of a hermetic compressor according to the second embodiment of the present invention, FIG. 6 is a plan view of the hermetic compressor according to the same embodiment, and FIG. 7 is an exploded view of the discharge valve device according to the same embodiment. FIG. 8 is a side cross-sectional view of the discharge valve device in the same embodiment.

  5, 6, 7, and 8, the sealed container 201 includes a discharge pipe 202 and a suction pipe 203 connected to a cooling system (not shown), stores oil 204 at the bottom, and stator 205. And an electric element 207 including a rotor 206 and a compression mechanism 208 driven by the electric element 207 are housed, and the inside is filled with a refrigerant 209. The refrigerant 209 is preferably a refrigerant 209 other than a specific chlorofluorocarbon target corresponding to environmental problems in recent years, such as R134a or R600a which is a natural refrigerant.

  Next, the main configuration of the compression mechanism 208 will be described.

  The cylinder 210 includes a substantially cylindrical compression chamber 211 and a bearing portion 212. The valve plate 213 includes a discharge valve device 214 on the side opposite to the cylinder 210 and closes the compression chamber 211. The head 215 covers the valve plate 213. One end of the suction muffler 216 opens into the sealed container 201 and the other end communicates with the compression chamber 211. The crankshaft 217 has a main shaft portion 218 and an eccentric portion 219, and is supported by the bearing portion 212 of the cylinder 210 and press-fitted and fixed to the stator 205. The piston 220 is inserted into the compression chamber 211 so as to be slidable back and forth, and is connected to the eccentric portion 219 by a connecting rod 221.

  Next, the discharge valve device 214 provided in the compression mechanism 208 will be described.

  The valve plate 213 is provided with a horizontally elongated recess 222 on the side opposite to the cylinder 210, a discharge hole 223 communicating with the cylinder 210 at the bottom of the recess 222, and a valve seat portion 224 formed so as to surround the discharge hole 223, A seat portion 224 and a base portion 225 formed on substantially the same plane are provided.

  The discharge lead 226 is made of a tongue-shaped leaf spring material and includes an opening / closing portion 227 for opening and closing the valve seat portion 224.

  The spring lead 228 is made of a tongue-shaped leaf spring material and includes a movable portion 229.

  The stopper 230 is made of a leaf spring material, and includes a stopper holding portion 231 formed at both ends of the stopper 230 and fixed to the valve plate 213, and a restriction portion 232 that restricts the movement of the discharge lead 226 when it abuts. Yes.

  The discharge lead 226 and the spring lead 228 are arranged in this order on the bottom of the recess 222, and the stopper holding portion 231 is held by the valve plate 213.

  One end of the stopper holding portion 231 of the stopper is provided with a slit 236 so as to be movable in the longitudinal direction between the head 234 of the fixing pin 233 and the bubble plate 213.

  The operation and action of the hermetic compressor configured as described above will be described below.

  When electricity is supplied to the electric element 207, the rotor 206 rotates and the crankshaft 217 is driven to rotate. At this time, the eccentric rotational motion of the eccentric portion 219 is transmitted to the piston 220 via the connecting rod 221, so that the piston 220 reciprocates in the compression chamber 211.

  As the piston 220 reciprocates, the refrigerant 209 in the sealed container 201 is sucked into the compression chamber 211 from the suction muffler 216, and the low-pressure refrigerant 209 passes through the suction pipe 203 from the cooling system (not shown). Flows into 201. The refrigerant 209 sucked into the compression chamber 211 is compressed and discharged into the head 215 through the discharge valve device 214 of the valve plate 213. Further, the high-pressure refrigerant 209 gas discharged into the head 215 is discharged from the discharge pipe 202 to a cooling system (not shown).

  At this time, the discharge valve device 214 communicates the inside of the compression chamber 211 and the head 215 via the discharge hole 223 when the discharge lead 226 is opened, and seals the inside of the compression chamber 211 and the head 215 when the discharge lead 226 is closed. Opening and closing operations are performed.

  Further, since the stopper 230 holds the stopper holding portion 231 by the fixing pin 233, the variation in the space height between the discharge lead 226 and the stopper 230 can be reduced, and a predetermined space height can be obtained. As a result, the efficiency can be improved.

  Here, in business applications where the amount of refrigerant enclosed is very large, a large amount of liquid state refrigerant 209 and oil 204 is returned from the external cooling circuit (not shown) through the suction pipe 203 in the initial stage of starting the compressor. May come. At this time, a large amount of the refrigerant 209 and oil 204 in the liquid state are sucked into the cylinder 210 from the suction muffler 216.

  Further, while the compressor is stopped, the liquid state refrigerant 209 is dissolved in the oil 204 in the sealed container 201. However, when a large amount is dissolved, a forming phenomenon is caused by the decompression in the sealed container 201 when the compressor is started. May occur. The foam generated at this time rises in the space between the sealed container 201 and the electric element 207 and between the sealed container 201 and the compression mechanism 208, and in many cases, the foam is sucked into the cylinder 210 from the suction muffler 216. .

  When such a liquid or a refrigerant 209 gas mixed with the liquid flows into the cylinder 210 and is compressed by the piston 220, a so-called liquid compression phenomenon that abnormally increases the internal pressure of the cylinder 210 occurs. Excessive stress may be generated on the surface, which may cause failure such as breakage or abnormal wear.

  However, according to the present embodiment, since the stopper 230 is formed of a leaf spring material, the stopper 230 is elastically deformed in the direction of the anti-cylinder 210 due to the elasticity of the leaf spring material. A strong load due to the refrigerant 209 and the oil 204 is applied from the opening / closing portion 227 of the discharge lead 226 to the restriction portion 232 of the stopper 230 via the spring lead 228. However, since the stopper 230 moves in the direction opposite to the cylinder 210, the opening / closing of the discharge lead 226 The spatial distance between the portion 227 and the restriction portion 232 of the stopper 230 increases.

  As a result, the refrigerant 209 and the oil 204 in the liquid state are easily discharged, and an abnormal increase in the internal pressure of the cylinder 210 can be prevented, so that excessive stress on the components of the compression mechanism 208 can be reduced.

  At this time, both ends of the stopper 230 are held by the valve plate 213 by the fixing pins 233 fixed to the valve plate 213, and one end of the stopper holding portion 231 is between the head 234 of the fixing pin 233 and the valve plate 213. Since the slit 236 is formed so as to be movable in the longitudinal direction, the stopper 230 slides the slit 236 in the direction opposite to the cylinder 210 starting from one end of the stopper holding portion 231, so that the opening / closing portion 227 of the discharge lead 226 is formed. And the spatial distance of the restricting portion 232 of the stopper 230 further increases.

  As a result, the refrigerant 209 and oil 204 in the liquid state are more easily discharged, and an abnormal increase in the internal pressure of the cylinder 210 can be prevented, so that excessive stress on the components of the compression mechanism 208 can be further reduced.

  Therefore, it is possible to provide a highly reliable hermetic compressor that can prevent abnormal wear or the like of the sliding portion due to liquid compression and is less likely to cause failure.

  Thereafter, the stopper 230 returns to the initial shape simultaneously with returning to the state in which the normal refrigerant 209 gas is compressed.

  Furthermore, since the stopper 230 does not break for a long period while maintaining sufficient flexibility, it is possible to provide a highly reliable hermetic compression with stable performance.

  As described above, the hermetic compressor according to the present invention has a liquid state into the oil when the hermetic compressor is stopped, even when the refrigerant and oil in the liquid state from the external cooling circuit frequently return. Since a hermetic compressor with high reliability without failure can be provided even when the amount of refrigerant dissolved is large, it can be applied to applications such as air-conditioning and commercial large-scale refrigeration equipment.

Sectional drawing of the hermetic compressor in Embodiment 1 of this invention Plan view of hermetic compressor in the same embodiment Exploded view of the discharge valve device in the same embodiment Side sectional view of the discharge valve device in the same embodiment Sectional drawing of the hermetic compressor in Embodiment 2 of this invention Plan view of hermetic compressor in the same embodiment Exploded view of the discharge valve device in the same embodiment Side sectional view of the discharge valve device in the same embodiment Cross section of a conventional hermetic compressor Plan view of a conventional hermetic compressor Exploded view of discharge valve device of conventional hermetic compressor Side sectional view of a discharge valve device of a conventional hermetic compressor

Explanation of symbols

110, 210 Cylinder 113, 213 Valve plate 114, 214 Discharge valve device 120, 220 Piston 123, 223 Discharge hole 124, 224 Valve seat 126, 226 Discharge lead 130, 230 Stopper 133, 233 Fixed pin 134, 234 Head 135 spring

Claims (5)

  A cylinder in which the piston reciprocates, a valve plate that seals the opening end of the cylinder and includes a discharge valve device on the side opposite to the cylinder; A valve seat portion provided outside the discharge hole is formed on the valve plate, and a discharge lead made of a leaf spring material for opening and closing the valve seat portion, and disposed on the valve lead side opposite to the discharge lead. A hermetic compressor including a stopper that restricts movement of the lead, the stopper being held by the valve plate at both ends and having elasticity with respect to the valve plate.   The hermetic compressor according to claim 1, wherein both ends of the stopper are held by the valve plate via an elastic material.   The hermetic compressor according to claim 2, wherein a spring is sandwiched between a head of a fixing pin fixed to the valve plate and at least one end of the stopper.   The hermetic compressor according to claim 1, wherein the stopper is formed of a leaf spring material.   Both ends of the stopper are held on the valve plate by fixing pins fixed to the valve plate, and at least one end of the stopper is held so as to be movable in the longitudinal direction between the head of the fixing pin and the valve plate. Item 5. The hermetic compressor according to Item 4.

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