JP4581354B2 - Hermetic compressor - Google Patents

Description

  The present invention relates to an improvement in a suction muffler of a hermetic compressor used in a refrigerator, an air conditioner, a freezer / refrigerator, and the like.

  In recent years, a hermetic compressor used in a refrigerator-freezer or the like is strongly desired to have high energy efficiency in addition to low noise during operation.

  As a conventional hermetic compressor, there is one that enhances the noise reduction effect of the suction muffler and increases the energy efficiency by effectively using the noise reduction effect and increasing the refrigerant circulation amount into the compression chamber (for example, Patent Document 1). reference).

  In addition, there is one in which the energy efficiency is improved by maintaining the refrigerant gas returning from the refrigeration cycle at a low temperature in a higher density state and sucking it into the compression chamber (for example, see Patent Document 2).

  Hereinafter, the operation of the above-described conventional hermetic compressor will be described with reference to the drawings.

  6 is a cross-sectional view of a conventional hermetic compressor, FIG. 7 is a cross-sectional view of a suction muffler of a conventional hermetic compressor, and FIG. 8 is a flow velocity showing the behavior of refrigerant gas in the suction muffler of the conventional hermetic compressor. It is a vector diagram.

  In FIG. 6, the hermetic container 1 accommodates an electric element 5 including a stator 3 and a rotor 4 having a winding portion 2, and a compression element 6 driven by the electric element 5. 1 is stored.

  Next, a schematic configuration of the compression element 6 will be described below. The crankshaft 10 has a main shaft portion 11 in which the rotor 4 is press-fitted and fixed, and an eccentric portion 12 formed eccentric to the main shaft portion 11, and an oil pump 13 is opened in the oil 8 inside the main shaft portion 11. It is provided to do. The cylinder block 20 formed above the electric element 5 has a substantially cylindrical compression chamber 22 and a bearing portion 23 that supports the main shaft portion 11. The piston 30 is inserted into the compression chamber 22 of the cylinder block 20 so as to be slidable back and forth, and is connected to the eccentric portion 12 by a connecting means 31.

  The valve plate 35 that seals the open end surface of the compression chamber 22 includes a suction hole 38 that communicates with the compression chamber 22 by opening and closing the suction valve 34. The cylinder head 36 is fixed to the opposite side of the compression chamber 22 via the valve plate 35. The suction pipe 37 is fixed to the sealed container 1 and connected to the low pressure side (not shown) of the refrigeration cycle, and guides a refrigerant gas (not shown) into the sealed container 1. The suction muffler 40 is fixed by being sandwiched between the valve plate 35 and the cylinder head 36, and is mainly formed of a synthetic resin such as polybutylene terephthalate to which glass fiber is added.

  In FIG. 7, the suction muffler 40 has a silencing space 43, a second communication path 46 that opens while one end 46 b communicates with the sealed container 1 and the other end 46 a extends into the silencing space 43, and one end 45 b has a valve. The plate 35 has a first communication passage 45 that communicates with the suction hole 38 of the plate 35, and the other end 45 a extends into the silencing space 43.

  FIG. 8 is a flow velocity vector 60 showing the behavior of the refrigerant gas in the suction muffler 40 obtained by computer simulation. The length of each vector indicates the magnitude of the flow velocity, and the direction of the vector is the flow direction of the refrigerant gas. Is shown.

Further, an upper vortex 61 formed by the upward flow of the refrigerant gas is released from the open end 46a of the second communication passage 46, the lower of the refrigerant gas is released from the open end 46a of the second communication passage 46 Each of the lower vortices 62 formed by the flow to the is indicated by an arrow.

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

  The rotor 4 of the electric element 5 rotates the crankshaft 10, and the rotational movement of the eccentric portion 12 is transmitted to the piston 30 via the connecting means 31, so that the piston 30 reciprocates in the compression chamber 22. By this operation, the refrigerant gas is guided into the sealed container 1 from the cooling system (not shown) through the suction pipe 37. The refrigerant gas introduced into the hermetic container 1 is sucked from the opening end 46 b of the suction muffler 40 and is opened to the sound deadening space 43 from the opening end 46 a of the second communication path 46. As shown in FIG. 8, the released refrigerant gas collides with the outer wall of the suction muffler 40 that is close to and opposed to the opening end 46 a, and then forms an upper vortex 61 and a lower vortex 62 and circulates in the sound deadening space 43. Thereafter, the refrigerant gas mainly composed of the upper vortex 61 is sucked into the first communication path 45 from the opening end 45 a of the first communication path 45 and led to the suction hole 38 opened in the valve plate 35. When the suction valve 34 is opened, the refrigerant gas is sucked into the compression chamber 22, compressed by the reciprocating motion of the piston 30, and discharged to the cooling system.

  Here, the pressure pulsation of the refrigerant generated when the refrigerant is sucked into the compression chamber 22 propagates in the reverse direction of the refrigerant flow and propagates from the opening end 45 a of the first communication path 45 to the sound deadening space 43. Here, the first communication path 45 is extended in the silencing space 43 having a high silencing effect, and the opening end 45a is positioned at a node of a sound in the 3 to 4 kHz region that causes noise, for example, in a specific frequency band. A high silencing effect can be obtained.

  Further, since the pressure pulsation attenuated in the silencing space 43 is further attenuated by adjusting the size of the silencing space 43 and the length and inner diameter of the second communication passage 46, a higher silencing effect can be obtained.

  FIG. 9 is a sectional view of a suction muffler 50 of another conventional hermetic compressor. Hereinafter, another conventional example will be described with reference to the drawings. Since the overall configuration excluding the suction muffler 50 is the same as that of the prior art, detailed description thereof is omitted.

  In FIG. 9, the suction muffler 50 has a resonance space 58 provided so as to surround the suction space 57. The second communication path 56 has one end communicating with the sealed container 1 and the other end communicating with the suction space 57. One end of the first communication passage 55 opens to the suction space 57, and the other end communicates with the compression chamber 22 via the suction valve 34. Further, the communication hole 59 communicates the first communication path 55 and the resonance space 58.

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

The low-temperature refrigerant gas returning from the refrigeration system (not shown) is sucked into the suction space 57 of the suction muffler 50 from the second communication path 56 and then sucked into the compression chamber 22 through the first communication path 55. At this time, since the suction space 57 is surrounded by the resonance space 58, the suction space 57 is thermally insulated by the refrigerant gas in the resonance space 58 and the outer shell wall of the resonance space 58. As a result, the refrigerant gas in the suction space 57 is not directly heated by the high-temperature refrigerant gas in the hermetic container 1, and a high-density refrigerant gas can be sucked into the compression chamber 22 to increase the suction efficiency. Can do. In addition, since the resonance space 58 communicates with the suction space via the communication hole 59, it functions as a resonance chamber, and noise can be reduced.
JP 2003-42064 A Japanese Patent Laid-Open No. 11-303739

  However, in the conventional configuration, the refrigerant gas that is sucked into the suction muffler 40 from the cooling system (not shown) by the reciprocating motion of the piston 30 through the sealed container 1 and opened to the sound deadening space 43 from the second communication path 46 is As shown in FIG. 8, instead of directly flowing into the first communication path 45, after colliding with the outer wall of the suction muffler 40 that is in close proximity to the opening end 46 a, an upper vortex 61 and a lower vortex 62 are formed to form a silencing space. It circulates in 43. Therefore, the low-temperature refrigerant gas returned from the cooling system exchanges heat with the high-temperature refrigerant gas in the hermetic container 1 through the adjacent outer wall and is greatly heated. Furthermore, the circulating flow formed by the upper vortex 61 and the lower vortex 62 is sucked from the opening end 45a of the first communication passage 45 after being heated by the refrigerant gas whose temperature has increased and stays in the silencing space 43. Therefore, there is a problem that the mass flow rate of the refrigerant that can be sucked into the compression chamber 22 is reduced and the suction efficiency is lowered.

  In addition, since the refrigerant gas released from the opening end 46 a of the second communication path 46 to the sound deadening space 43 forms the upper vortex 61 and the lower vortex 62, the refrigerant gas opened from the opening end 46 a of the second communication path 46 to the first communication path 45. The flow inertia force of the refrigerant gas sucked in the silencing space 43 up to the opening end 45a is greatly reduced, and the pressure loss is increased. As a result, there is a problem that the mass flow rate of the refrigerant gas sucked into the compression chamber 22 is further reduced, and the suction efficiency is further deteriorated.

  In addition, since the opening end 45a of the first communication passage 45 faces the outer wall of the suction muffler 40 in the vicinity, the outer wall of the suction muffler 40 that faces and closes under the influence of the opening end 45a that causes the maximum pressure pulsation. There is a problem that the vibration is oscillated and the pulsation noise of the refrigerant is radiated to the outside of the suction muffler 40 to increase the noise.

  On the other hand, in another conventional configuration, since the resonance space 58 surrounds the suction space 57 constituting the suction muffler 50, the refrigerant gas in the suction space 57 is a high-temperature refrigerant gas in the sealed container 1. However, the refrigerant gas sucked into the suction space 57 from the second communication path 56 reaches the first communication path 55 as in the above-described embodiment. A large vortex is formed and a large pressure loss occurs. As a result, there is a problem that the mass flow rate of the refrigerant gas that can be sucked into the compression chamber 22 is reduced, and the suction efficiency is lowered.

  Further, in order to surround the entire suction space 57 with the resonance space 58, there is a problem that the entire size of the suction muffler 50 is increased, and there is a problem that the number of parts is increased or the molding is complicated. It was.

  An object of the present invention is to provide a hermetic compressor with high efficiency and low noise.

In order to solve the above-described problems, a hermetic compressor according to the present invention accommodates a compression element driven by an electric element in a hermetic container, and the compression element is disposed at an opening end of a compression chamber, and a suction muffler. The muffler includes a muffler body that forms a silencing space, a first communication passage that communicates the suction valve and the silencing space, and a second communication that communicates the inside of the sealed container and the silencing space. An opening end in the silencing space of the first communicating path and the second communicating path opens in the same direction, and at least the first communicating wall of the outer shell wall forming the silencing space. The wall surface of the opposing surface where the opening end in the silencing space of the passage and the second communication passage opens is a double wall in which a partition space is formed , and the low temperature sucked from the second communication passage To reduce the heat loss of refrigerant gas To have the effect that it is possible to reduce noise by double walls thus transmitted sound is small, to suppress the excitation of the suction muffler.

In addition, a compression element driven by an electric element is accommodated in an airtight container, the compression element includes a suction valve disposed at an opening end of the compression chamber, and a suction muffler, and the suction muffler forms a muffler space. body and a first communication passage communicating with said muffling space and the suction valve, the closed and container with said muffling space and a second communication passage communicating said said first communication passage second The opening end in the silencing space of the communication path opens in the same direction, and the first communication path passes through a predetermined distance from the wall surface facing the opening end in the silencing space of the first communication path and the second communication path. And a guide wall that guides the refrigerant gas opened from the second communication path to the muffling space to the first communication path. Rectifying refrigerant gas to be sucked With improved efficiency reduces the more the pressure loss, has the effect of increasing the intake amount of the refrigerant gas, it is possible to obtain a high refrigerating capacity for cylinder volume. Furthermore, the heat receiving loss can be effectively reduced by the partition structure composed of the outer wall and the guide wall .

  According to the hermetic compressor of the present invention, it is possible to improve the suction efficiency by effectively preventing the heating of the suction gas introduced into the suction muffler in a small space, and the outer wall of the suction muffler is provided with the suction gas. Since there is little transmitted sound due to the double wall, there is an effect that noise can be reduced.

  In addition, by smoothing the suction gas flow in the suction muffler, heating in the suction muffler is reduced, and the suction gas is guided to the compression chamber using the flow inertia force of the suction gas. The flow rate can be improved and the suction efficiency can be increased, and the outer wall of the suction muffler can be prevented from being directly vibrated by the suction gas, and the noise can be reduced because there is little transmitted sound due to the double wall. effective.

According to a first aspect of the present invention, a compression element driven by an electric element is accommodated in an airtight container, and the compression element includes a suction valve disposed at an opening end of a compression chamber, and a suction muffler, and the suction muffler Has a muffler body that forms a silencing space, a first communication passage that communicates the suction valve and the silencing space, and a second communication passage that communicates the inside of the sealed container and the silencing space, The opening end in the silencing space of the first communicating path and the second communicating path opens in the same direction, and at least the first communicating path and the second communicating path among the outer shell walls forming the silencing space. The wall surface of the facing surface where the opening end in the silencing space opens is a double wall in which a partition space is formed inside, and the heat receiving loss of the low-temperature refrigerant gas sucked from the second communication path is reduced And transmitted sound due to the double wall. Without an effect that it is possible to reduce the noise by suppressing the excitation of the suction muffler.

According to a second aspect of the present invention, a compression element driven by an electric element is accommodated in a sealed container, and the compression element includes a suction valve disposed at an opening end of a compression chamber, and a suction muffler, and the suction muffler Has a muffler body that forms a silencing space, a first communication path that communicates the suction valve and the silencing space, and a second communication path that communicates the inside of the sealed container and the silencing space, The opening end in the silencing space of the first communicating path and the second communicating path opens in the same direction , and is formed in a U-shape with one surface opened in the silencing space, and forms the U-shape. The opening in the silencing space of the first communicating path and the second communicating path is opposed to the opening to be guided to guide the refrigerant gas released from the second communicating path to the silencing space to the first communicating path. the guide wall which is provided, said guide wall, Are those wherein silencing space open end of the second communication path and the first communication passage in the serial muffler body is provided through the wall surface with a predetermined distance of the opposing surfaces of the opening, that rectifies the refrigerant gas sucked As a result, the pressure loss is reduced and the efficiency is improved, and the refrigerant gas suction amount is increased, so that a high refrigeration capacity can be obtained with respect to the cylinder volume. Furthermore, it has the effect | action that it can reduce noise by suppressing the vibration of a suction muffler while reducing heat receiving loss effectively by the division structure which consists of an outer wall and a guidance wall.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the suction muffler is made of a synthetic resin material and is composed of at least two parts. Are arranged perpendicularly to the joining surface at the time of assembly. In addition to the operation of claim 1 or 2 described above, the die removal direction and double wall or The action of being able to match the die-cutting direction of the guide wall and easily manufacturing without increasing the mold cost due to the complicated die-cutting direction and the increase in the number of parts due to separate parts Have

  Hereinafter, embodiments of a hermetic compressor according to the present invention will be described with reference to the drawings.

(Embodiment 1)
1 is a cross-sectional view of a hermetic compressor according to a first embodiment of the present invention. FIG. 2 is a sectional view of the suction muffler of the hermetic compressor according to the embodiment. FIG. 3 is an exploded perspective view of the suction muffler of the hermetic compressor according to the embodiment.

  In FIG. 1, an airtight container 101 accommodates an electric element 105 including a stator 103 and a rotor 104 having a winding portion 102, and a compression element 106 driven by the electric element 105, and oil 108 is an airtight container. 101 is stored.

  Next, a schematic configuration of the compression element 106 will be described below. The crankshaft 110 has a main shaft portion 111 in which the rotor 104 is press-fitted and fixed, and an eccentric portion 112 formed eccentrically with respect to the main shaft portion 111, and an oil pump 113 is opened in the oil 108 inside the main shaft portion 111. It is provided to do. The cylinder block 120 formed above the electric element 105 includes a substantially cylindrical compression chamber 122 and a bearing portion 123 that supports the main shaft portion 111. The piston 130 is inserted into the compression chamber 122 of the cylinder block 120 so as to be slidable back and forth, and is connected to the eccentric portion 112 by a connecting means 131.

  The valve plate 135 that seals the opening end surface of the compression chamber 122 includes a suction hole 138 that communicates with the compression chamber 122 by opening and closing the suction valve 134. The cylinder head 136 is fixed to the opposite side of the compression chamber 122 via the valve plate 135. The suction pipe 137 is fixed to the sealed container 101 and connected to the low pressure side (not shown) of the refrigeration cycle, and guides a refrigerant gas (not shown) into the sealed container 101. The suction muffler 140 is fixed by being sandwiched between the valve plate 135 and the cylinder head 136, and is mainly formed of a synthetic resin such as polybutylene terephthalate to which glass fiber is added.

  2 and 3, the suction muffler 140 has a suction muffler main body 141, a suction muffler lid 142, a first communication path 145, and a second communication path 146, and forms a sound deadening space 143. The partition space 150 is provided on the outer wall of the suction muffler 140 that is close to and opposed to the opening end 145a of the first communication passage 145 and the opening end 146a of the second communication passage 146. The double wall 151 is connected to the partition space 150. It is a wall that partitions the silencing space 143.

  Further, as shown in FIG. 3, the double wall 151 is disposed perpendicular to the mold dividing surface (opening surface) at the time of molding the synthetic resin. After the first communication passage 145 is inserted and assembled in the suction muffler main body 141, the welding projection 145b is aligned with the hole 142b of the suction muffler lid 142. Thereafter, the suction muffler main body 141 and the suction muffler lid 142 are joined by a method such as ultrasonic welding to complete the suction muffler 140.

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

  In the suction muffler 40 of the conventional example, the temperature of the refrigerant gas rises by about 10K between the opening end 46b of the second communication path 46 discharged into the sealed container 1 and the opening end 45b of the first communication path 45, and finally Thus, the air is sucked into the compression chamber 22. In addition, a temperature rise of about 4K occurs while flowing from the opening end 46a of the second communication passage 46 into the sound deadening space 43 and then flowing into the opening end 45a of the first communication passage 45.

  However, in this embodiment, the heat insulation effect of only the outer wall of the suction muffler 140 in which the main flow of the refrigerant gas flowing from the opening end 146a of the second communication path 146 to the opening end 145a of the first communication path 145 is formed is partially achieved. By improving, it is possible to obtain an effective heat insulation effect in a small space as compared with the case where the entire suction muffler 140 is covered with a double wall. As a result, the action of maintaining the refrigerant gas at a low temperature and high density can be effectively enhanced, and the mass flow rate of the intake gas can be increased.

  By reducing the heating of the refrigerant gas as described above, the temperature rise between the opening end 146a and the opening end 145a can be suppressed to 2K or less, and the refrigerating capacity is improved by 1.5% compared to the conventional suction muffler specification, and the efficiency ( (Hereinafter referred to as COP) was confirmed to be improved by 1.0% or more.

  On the other hand, the refrigerant gas in the suction muffler 140 becomes an intermittent flow according to the reciprocating motion of the piston 130. At this time, the pressure pulsation propagates in the direction opposite to the flow of the refrigerant gas toward the opening end 145a of the first communication path 145, and is reflected toward the outer wall facing and close to the opening end 145a of the first communication path 145. A wave is generated. The reflected wave is prevented from being transmitted outside the suction muffler 140 by the sound absorption effect of the partitioned space 150 formed by the double wall 151, and the outer wall strength of the suction muffler 140 is reduced by the double wall 151. Therefore, the vibration of the suction muffler 140 due to the reflected wave can be avoided. In particular, it has been confirmed that it is effective for reducing transmitted sound of high frequency components in the audible range.

  On the other hand, by providing the double wall 151 perpendicular to the mold splitting surface (opening surface) at the time of molding the suction muffler 140 made of synthetic resin, the mold drawing direction and the double wall 151 at the time of molding the suction muffler main body 141 are provided. Therefore, it is possible to easily manufacture the mold without increasing the cost of the mold due to an increase in the number of parts due to the complexity of the mold drawing direction and the use of separate parts.

  In the present embodiment, the partition space 150 and the sound deadening space 143 formed by the double wall 151 are completely blocked, but a communication hole is provided in a part of the double wall 151 to make the partition space 150 a resonance chamber. As a result, the sound insulation effect of the suction muffler can be further enhanced.

  In the present embodiment, the double wall 151 is disposed inside the suction muffler 140 as means for providing the partition space. However, by providing a structure that is a separate part from the suction muffler 140 outside the suction muffler 140, the partition space 150 is provided. The same effects as in this embodiment can also be obtained by forming.

  The second communication path 146 is integrally formed on the suction muffler main body 141 side. However, by integrally forming on the suction muffler lid 142 side, the influence of heat reception from the electric element 105 located on the back of the suction muffler main body 141 is reduced. Can be suppressed.

(Embodiment 2)
FIG. 4 is a cross-sectional view of the suction muffler of the hermetic compressor according to the second embodiment of the present invention. FIG. 5 is a flow velocity vector diagram showing the behavior of the refrigerant gas in the suction muffler according to the second embodiment of the present invention. The configuration of the hermetic compressor in the present embodiment is the same as the configuration shown in FIG. 1 except for the suction muffler, and thus the description thereof is omitted.

In FIG. 4, the suction muffler 140 includes a suction muffler main body 141, a suction muffler lid (not shown), a first communication path 145, and a second communication path 146, and forms a sound deadening space 143. The guide wall 152 is formed such that the opening end 145a of the first communication path 145 and the opening end 146a of the second communication path 146 are positioned on the side of each opening end 145a, 146a with a predetermined distance from the wall surface facing each other. The refrigerant gas released from the communication path 146 is guided to the opening end 145 a of the first communication path 145.

  In FIG. 5, a flow velocity vector 160 indicates the behavior of the refrigerant gas in the suction muffler 140 obtained by computer simulation. The length of each vector indicates the magnitude of the flow velocity, and the vector direction indicates the flow direction of the refrigerant gas. ing. Further, an upward flow 161 formed by the refrigerant gas released from the opening end 146a of the second communication path 146 is indicated by an arrow.

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

  In this embodiment, the guide wall 152 that guides the refrigerant gas that is opened at the opening end 146a of the second communication path 146 to the opening end 145a of the first communication path 145 is provided, so that as shown in FIG. Most of the refrigerant gas opened at the open end 146 a of the two communication passages 146 forms an upward flow 161 and is sucked into the first communication passage 145. At this time, the refrigerant gas staying in the silencing space 143 is heated by the outer wall of the suction muffler 140 heated by the high-temperature refrigerant gas or the like in the sealed container 101, and is heated from the second communication path 146 into the silencing space 143. The temperature is higher than the refrigerant gas that has just flowed in.

  Therefore, most of the refrigerant gas opened at the opening end 146a of the second communication path 146 is sucked into the first communication path 145 as quickly as possible, and as much as possible with the heated high-temperature refrigerant gas staying in the sound deadening space 143. By isolating, the heat reception of the low-temperature refrigerant gas represented by the upward flow 161 can be reduced, so that the density of the refrigerant gas can be improved while maintaining the density of the refrigerant gas low.

  Further, since the guide wall 152 is not a pipe but is formed as a guide path having a U-shape, the pressure loss is small. For this reason, by providing the guide wall 152, the refrigerant gas sucked from the opening end 146 a is rectified so as to flow smoothly and directly guided to the opening end 145 a of the first communication path 145, thereby reducing pressure loss. Can improve efficiency. Furthermore, the suction gas can be guided to the compression chamber 122 by utilizing the flow inertia force of the suction gas with almost no convection of the refrigerant gas convection in the silencing space 143, thereby improving the mass flow rate of the suction gas. be able to.

  As a result, it is possible to increase the suction efficiency by reducing the heat loss of refrigerant gas and increasing the flow rate of the suction gas, the refrigeration capacity is improved by 2.5% compared to the conventional example, and the COP is improved by 2.0% or more. It was confirmed.

  On the other hand, with respect to the reflected wave radiated from the opening end 145 a of the first communication path 145 toward the outer wall that is close to and facing, the guiding wall 152 covers the opening end 145 a so that the reflected wave is surrounded by the outer wall of the suction muffler 140. In addition, it is possible to prevent the reflected wave from vibrating the outer wall of the suction muffler 140 by the guide wall 152. In particular, it has been confirmed that it is effective for reducing transmitted sound of high frequency components in the audible range.

Further, in the present embodiment, in order to maintain the attenuation effect of the reflected wave generated from the opening end 145a of the first communication path 145, the gap between the opening end 145a of the first communication path 145 and the end of the guide wall 152 is approximately. Although a clearance of about 5 mm is provided, the refrigerant gas flow resistance can be further reduced and the suction efficiency can be increased by connecting the outer peripheral portion of the guide wall 152 to the opening end 145a of the first communication path 145.

  In the present embodiment, the description of the specifications overlapping with those in the first embodiment is omitted, but the effect of the arrangement direction of the guide wall 152 with respect to the mold dividing surface (opening surface) at the time of synthetic resin molding is the same as in the second embodiment. Can get to.

  As described above, the hermetic compressor according to the present invention can increase the suction efficiency and suppress the direct excitation of the outer wall of the suction muffler by the suction gas. Therefore, it can reduce noise and can be widely applied as a high-efficiency, low-noise hermetic compressor used in a refrigerator, an air conditioner, a freezer / refrigerator and the like.

Sectional drawing of the hermetic compressor by Embodiment 1 of the present invention. Sectional drawing of the inhalation muffler by Embodiment 1 of this invention 1 is an exploded perspective view of an inhalation muffler according to Embodiment 1 of the present invention. Sectional drawing of the inhalation muffler by Embodiment 2 of this invention Flow velocity vector diagram in the suction muffler according to the second embodiment of the present invention Cross section of a conventional hermetic compressor Cross-sectional view of a suction muffler of a conventional hermetic compressor Flow velocity vector diagram in the suction muffler of a conventional hermetic compressor Cross-sectional view of a suction muffler of a conventional hermetic compressor

DESCRIPTION OF SYMBOLS 101 Sealed container 105 Electric element 106 Compression element 122 Compression chamber 134 Suction valve 140 Suction muffler 141 Suction muffler main body 143 Silent space 145 First communication path 146 Second communication path 151 Double wall 152 Guide wall

Claims (3)

A compression element driven by an electric element is accommodated in an airtight container, the compression element includes a suction valve disposed at an opening end of the compression chamber, and a suction muffler, and the suction muffler includes a muffler body that forms a silencing space; A first communication path that communicates the suction valve and the silencing space, and a second communication path that communicates the inside of the sealed container and the silencing space, and the first communication path and the second communication path. The opening end in the silencing space opens in the same direction, and at least the opening end in the silencing space of the first communication path and the second communication path of the outer shell wall forming the silencing space opens. A hermetic compressor in which the opposite wall surface is a double wall in which a partition space is formed. A compression element driven by an electric element is accommodated in an airtight container, the compression element includes a suction valve disposed at an opening end of the compression chamber, and a suction muffler, and the suction muffler includes a muffler body that forms a silencing space; A first communication path that communicates the suction valve and the silencing space, and a second communication path that communicates the inside of the sealed container and the silencing space, and the first communication path and the second communication path. The opening end in the silencing space opens in the same direction , and is formed in a U-shape with one surface opened in the silencing space, and the first communication path is formed in the opening forming the U-shape. A guide wall is provided for guiding the refrigerant gas released from the second communication path to the muffler space to the first communication path by facing the opening end in the noise reduction space of the second communication path, and the guide wall In the muffler body Serial hermetic compressor said muffling space open end of the first communication passage second communication passage is provided through the wall surface with a predetermined distance of the opposing surfaces of the opening. 3. The suction muffler is made of a synthetic resin material, is composed of at least two parts, and a wall or a guide wall forming a sound deadening space is disposed perpendicular to a joint surface at the time of assembly. The hermetic compressor according to claim 1.

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