JP2009257149A - Intake flow path changing adaptor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means capable of quickly suppressing noises without raising compressor manufacturing cost and complicating a compressor construction when the noises resulted from intake pressure pulsation are generated. <P>SOLUTION: An intake flow path changing adapter 119 of a bottomed cylindrical body made of resin is usable for various compressors, including a swash plate compressor 100 having a compression mechanism sucking in, compressing and discharging a refrigerant to a discharge chamber 117, a reciprocating compressor such as a rocking plate compressor, a scroll compressor, a vane compressor and the like, is attachable later to an intake port 118 of the compressor, when attached later to the intake port, forms the intake port and changes an intake flow path. When noises are generated in a refrigerant circuit low pressure side evaporator or the like connected to the intake port, if the intake flow path changing adapter is attached later, the intake flow path formed by the intake port is changed and the noises are suppressed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a suction flow path changing adapter that can be retrofitted to a suction port of a compressor.

A suction chamber that communicates with the low pressure side of the external refrigerant circuit via the suction port, a discharge chamber that communicates with the high pressure side of the external refrigerant circuit via the discharge port, and sucks and compresses the refrigerant in the suction chamber and discharges it to the discharge chamber Conventionally, compressors having various compression mechanisms such as a reciprocating compression mechanism, a scroll compression mechanism, and a vane compression mechanism have been widely used.
In the compressor, the suction pressure pulsation is caused by the refrigerant gas suction operation from the suction chamber to the compression mechanism. The suction pressure pulsation may propagate through the suction chamber and the suction port to the low pressure side of the external refrigerant circuit, and may cause noise by vibrating the evaporator or the like.
In Patent Document 1, by forming a bent suction port, the propagation of the suction pressure pulsation to the low pressure side of the external refrigerant circuit is suppressed, and the generation of noise due to the suction pressure pulsation is suppressed.
JP 2001-155954 A

The noise suppression measures described in Patent Document 1 are pre-built in the compressor. However, since the generation of noise is affected by the installation status of the compressor and the configuration of the external refrigerant circuit, the suction port is bent in advance. It is wasteful to cause an increase in compressor manufacturing cost and a complicated compressor configuration.
The present invention has been made in view of the above problems, and does not cause an increase in compressor manufacturing cost and a complicated compressor configuration, and can quickly suppress noise when noise due to suction pressure pulsation occurs. It aims to provide a means.

In order to solve the above problems, in the present invention, a suction chamber that communicates with the low pressure side of the external refrigerant circuit via the suction port, a discharge chamber that communicates with the high pressure side of the external refrigerant circuit via the discharge port, An intake port of a compressor having a compression mechanism that sucks and compresses the refrigerant in the room and compresses it into the discharge chamber, and becomes a part of the intake port when it is retrofitted to the intake port. A suction flow path changing adapter for changing a flow path is provided.
If noise is generated in an evaporator on the low-pressure side of the refrigerant circuit connected to the suction port, if the suction flow path changing adapter according to the present invention is retrofitted, the suction flow path formed by the suction port is changed to suppress noise. Is done. Since it is not necessary to preliminarily create a suction pressure pulsation propagation suppressing mechanism in the compressor, it does not cause an increase in compressor manufacturing cost and a complicated compressor structure.
If a plurality of types of adapters according to the present invention having different flow path modes and different flow path areas are prepared, the noise situation is generated when noise is generated in the low-pressure side refrigerant circuit connected to the suction port. Accordingly, the optimum adapter can be selectively attached to the suction port to suppress the noise, thereby expanding the range of noise countermeasures.

In a preferred embodiment of the present invention, the adapter reduces and changes the channel area of the suction channel.
In a preferred embodiment of the invention, the adapter bends the suction channel.
The change of the suction flow path by the adapter may be a reduction of the flow path area or a bending of the suction flow path.

According to the present invention, there is provided a compressor characterized in that any one of the above adapters is attached to a suction port.
In the compressor according to the present invention, generation of noise due to suction pressure pulsation is suppressed.

In a preferred embodiment of the present invention, the suction flow path changing adapter is attached to the inlet portion and the outlet portion of the suction port.
By changing the flow path at two locations on the suction flow path, the effect of suppressing the propagation of suction pressure pulsation is enhanced.

The present invention provides a means for suppressing noise generation caused by suction pressure pulsation that can flexibly cope with changes in the installation status of the compressor and the configuration of the external refrigerant circuit.

A suction flow path changing adapter according to an embodiment of the present invention used in a swash plate compressor will be described.
As shown in FIG. 1, a variable capacity swash plate compressor 100 includes a cylinder block 101 having a plurality of cylinder bores 101a, a bottomed cylindrical crankcase 102 facing one end of the cylinder block 101, and a valve plate 103. And a bottomed cylindrical cylinder head 104 facing the other end of the cylinder block 101.
A rotating shaft 106 is disposed across the crank chamber 105 defined by the cylinder block 101 and the crankcase 102. The rotating shaft 106 is inserted through the swash plate 107. The rotating shaft 106 is rotatably supported by the cylinder block 101 and the crankcase 102.
The swash plate 107 is connected to a rotor 108 fixed to the rotating shaft 106 via a link 109 and is supported by the rotating shaft 106 so that the tilt angle can be varied.
A coil spring 110 is disposed between the rotor 108 and the swash plate 107 to urge the swash plate 107 toward the minimum inclination angle. On the opposite side of the coil spring 110 across the swash plate 107, a coil spring 111 for urging the swash plate 107 in the minimum tilt state in the direction of increasing the tilt angle is disposed.

One end of the rotating shaft 106 passes through a boss portion 102 a formed at the bottom of the crankcase 102 and extends to the outside of the case, and is connected to a vehicle engine (not shown) via an electromagnetic clutch 112. A shaft seal device 113 is disposed between the rotating shaft 106 and the boss portion 102a.

A piston 114 is inserted into the cylinder bore 101a, and a pair of shoes 115 housed in a recess at one end of the piston 114 sandwich the outer periphery of the swash plate 107 so as to be slidable relative to each other.
The cylinder bore 101a and the piston 114 constitute a compression mechanism.

A suction chamber 116 and a discharge chamber 117 are formed in the cylinder head 104. The suction chamber 116 is formed at the center in the radial direction of the cylinder head 104, and the discharge chamber 117 is formed at the outer periphery in the radial direction of the cylinder head 104 surrounding the suction chamber 116.
The suction chamber 116 communicates with the cylinder bore 101a and is formed in the cylinder head 104 through a suction hole formed in the valve plate 103 and a suction valve (not shown) mounted on an end face of the valve plate 103 facing the cylinder block 101. The suction port 118 communicates with an evaporator on the low-pressure side of the vehicle air conditioner, which is an external refrigerant circuit (not shown).
The discharge chamber 117 communicates with the cylinder bore 101a through a discharge valve (not shown) mounted on the other end face of the valve plate 103 and a discharge hole formed in the valve plate 103, and a discharge (not shown) formed in the cylinder head 104. It communicates with the condenser on the high-pressure side of the vehicle air conditioner, which is an external refrigerant circuit, via the port.

As shown in FIGS. 1 and 2, the suction port 118 is formed by a straight cylindrical body 118 ′ that is formed integrally with the cylinder head 104 and extends through the peripheral side wall of the cylinder head 104 to the suction chamber 116. The suction port 118 is abruptly reduced in diameter in the vicinity of the inlet from the inlet located in the outer peripheral portion of the cylinder head 104 toward the outlet located in the central portion of the suction chamber, and then gradually. The suction port 118 forms a suction flow path for sucking refrigerant from the external refrigerant circuit into the suction chamber 116.
A suction flow path changing adapter 119 is retrofitted to the suction chamber 118 outlet of the suction port 118. As shown in FIG. 3, the suction flow path changing adapter 119 is a bottomed cylindrical body made of resin, and has an opened one end 119 a slightly larger in diameter than the closed other end, An opening 119b is formed in the vicinity of the closed end. The suction flow path changing adapter 119 is inserted into the suction port 118 from the inlet of the suction port 118 with the closed end directed forward in the traveling direction, and one end 119a is press-fitted and fixed near the outlet of the suction port 118. Attached to port 118 forms part of suction port 118. The opening 119 b of the suction flow path changing adapter 119 faces the suction chamber 116.

The crankcase 102, the cylinder block 101, the valve plate 103, and the cylinder head 104 are adjacent to each other via a gasket (not shown), and are integrally assembled using a plurality of through bolts 120.

A capacity control valve 200 is attached to the cylinder head 104. The capacity control valve 200 adjusts the opening of a communication path (not shown) between the discharge chamber 117 and the crank chamber 105 to control the amount of refrigerant gas introduced into the crank chamber 105. The refrigerant gas in the crank chamber 105 flows into the gap between the bearing disposed between the cylinder block 101 and the rotating shaft 106 and the rotating shaft 106, the space 121 formed in the cylinder block 101, and the valve plate 103. It flows into the suction chamber 116 through the formed orifice hole.
The capacity control valve 200 variably controls the internal pressure of the crank chamber 105 to variably control the inclination angle of the swash plate 107, and variably controls the discharge capacity of the variable capacity swash plate compressor 100.

In the variable capacity swash plate compressor 100, the driving force of the vehicle engine is transmitted to the rotating shaft 106 via the electromagnetic clutch 112, and the rotating shaft 106 rotates. The rotation of the rotary shaft 106 is transmitted to the swash plate 107 via the rotor 108 and the link 109, and the swash plate 107 rotates. The reciprocation of the outer periphery of the swash plate 107 accompanying the rotation of the swash plate 107 is transmitted to the piston 114 via the shoe 115, and the piston 114 reciprocates in the cylinder bore 101a. As the piston 114 reciprocates, the refrigerant gas returned from the evaporator of the vehicle air conditioner is sucked through the suction channel formed by the suction port 118 and the suction channel change adapter 119 which is a part of the suction port 118. It flows into the chamber 116 and further flows into the cylinder bore 101a through a suction hole and a suction valve formed in the valve plate 103. The refrigerant gas is compressed in the cylinder bore 101a, discharged to the discharge chamber 117 through the discharge hole and the discharge valve formed in the valve plate 103, and flows out to the condenser of the vehicle air conditioner through the discharge port.

When the suction valve opens, it may oscillate by itself and cause suction pressure pulsation. If the suction pressure pulsation propagates to the evaporator on the low pressure side of the vehicle air conditioner that is an external refrigerant circuit, the evaporator may vibrate and generate noise. In the variable capacity swash plate compressor 100, the flow path change adapter 119 is retrofitted to the outlet of the suction port 118 to form a part of the suction port 118, and the internal flow path of the flow path change adapter 119 is formed by the suction port 118. As part of the suction flow path, the suction flow path, which was originally linear, is bent to suppress the propagation of suction pressure pulsation to the evaporator of the vehicle air conditioner, thereby suppressing the generation of noise. .
The variable capacity swash plate compressor 100 is mounted on the vehicle without the flow path changing adapter 119 attached. The evaporator of the vehicle air conditioner vibrates during operation of the variable capacity swash plate compressor 100 depending on the installation status of the variable capacity swash plate compressor 100 on the vehicle body, the configuration of the vehicle air conditioner that is an external refrigerant circuit, and the like. When noise occurs, the flow path changing adapter 119 can be retrofitted to suppress the noise.
The variable capacity swash plate compressor 100 does not need to have a suction pressure pulsation propagation suppression mechanism such as a bent suction port 118 in advance, so that the compressor manufacturing cost is not increased and the compressor structure is not complicated.
In FIG. 3, instead of the single opening 119b, a plurality of openings 119b may be formed at intervals in the circumferential direction.

Instead of the flow path changing adapter 119 having the opening 119b that bends the suction flow path formed on the peripheral side wall, the flow path changing adapter having a small hole 119b ′ for reducing and changing the inflow path area shown in FIG. 119 ′ may be attached to the outlet of the suction port 118 in the same manner as the flow path changing adapter 119. By restricting the suction flow path, the propagation of the suction pressure pulsation to the evaporator can be suppressed, and the generation of noise can be suppressed.
If the flow path change adapter 119 and the flow path change adapter 119 ′ are prepared in advance, or if a plurality of types of flow path change adapters 119 having different shapes, formation positions, and numbers of the openings 119b are prepared, or If a plurality of types of flow path changing adapters 119 ′ having different shapes and areas of the small holes 119b ′ are prepared in advance, when noise is generated, the installation status of the variable capacity swash plate compressor 100 on the vehicle body, the external refrigerant circuit The flow path changing adapter having the highest noise suppression effect can be retrofitted according to the configuration of the vehicle air conditioner, etc., and can flexibly cope with changes in these external factors.

The attachment position of the flow path changing adapter 119 is not limited to the outlet of the suction port 118. 1, the flow path changing adapter 119 may be turned upside down and the one end 119a may be press-fitted and fixed to the vicinity of the inlet of the suction port 118. In this case, it is necessary to slightly increase the diameter of the one end 119a as compared with the case where it is attached to the outlet of the suction port 118. Similarly, the flow path changing adapter 119 ′ may be attached to the vicinity of the inlet of the suction port 118.
A flow path changing adapter 119 or a flow path changing adapter 119 ′ may be attached to the outlet of the suction port 118 and the vicinity of the inlet. One of the flow path changing adapters 119 and 119 ′ may be attached to the outlet of the suction port, and the other may be attached to the vicinity of the inlet. By changing the flow path at two locations on the suction flow path, the effect of suppressing the propagation of suction pressure pulsation is enhanced.
The mounting method of the flow path changing adapter is not limited to press-fitting. As shown in FIG. 5A, an inner flange 118a is formed in advance at the outlet of the suction port 118, and a circumferential groove 118b is formed in the inner surface of the peripheral side wall in the vicinity of the inner flange 118a. A bottomed cylindrical flow path changing adapter 119 ″ having an opening 119b ″ formed in the peripheral side wall and an outer flange 119a ″ formed at the opening end is inserted from the inlet side of the suction port 118 to insert the outer flange 119a ″ into the inner side. The flow path changing adapter 119 ″ may be attached to the outlet of the suction port 118 by engaging the flange 118a and then fitting the retaining ring 121 into the circumferential groove 118b. Changing the flow path with a small hole formed in the bottom wall The same applies to the adapter.
As shown in FIG. 5B, a plurality of slits 119c ″ are formed in the vicinity of the opening end including the outer flange 119a ″ at intervals in the circumferential direction, and a circumferential groove 118c is formed in the vicinity of the outlet of the suction port 118. The flow path changing adapter 119 ″ is inserted from the inlet side of the suction port 118 while the vicinity of the opening end including the outer flange 119a ″ is elastically deformed radially inward to engage the outer flange 119a ″ with the circumferential groove 118c. The flow path changing adapter 119 ″ may be attached to the outlet of the suction port 118. The same applies to the flow path changing adapter having a small hole formed in the bottom wall.

As shown in FIG. 6, in the variable capacity swash plate compressor, the discharge chamber 117 is formed at the central portion in the radial direction of the cylinder head 104, and the suction chamber 116 is formed around the discharge chamber 117 and formed at the outer peripheral portion of the cylinder head 104. Alternatively, the flow path changing adapters 119, 119 ′, and 119 ″ can be attached to the suction port 118 to suppress the propagation of the suction pressure pulsation to the external refrigerant circuit.

As shown in FIG. 7, the suction flow path changing adapters 119, 119 ′, 119 ″ are connected to the suction chamber 302 that communicates with the low pressure side of the external refrigerant circuit via the suction port 301 and the external refrigerant circuit via the discharge port 303. A suction chamber 304 that communicates with the high pressure side, a movable scroll 305 having a spiral body, and a fixed scroll 306 having a spiral body that meshes with the spiral body of the movable scroll 305 to form a plurality of working chambers. A scroll compression mechanism that sucks and compresses the refrigerant into the working chamber and discharges the refrigerant into the discharge chamber 304, a rotary shaft 307 that pivots the movable scroll 305, and a rotation prevention mechanism 308 that prevents the movable scroll 305 from rotating. It can also be used for the compressor 300. To the external refrigerant circuit of the suction pressure pulsation generated by the suction operation of the scroll compression mechanism Can be suppressed.

As shown in FIG. 8, the suction flow path changing adapters 119, 119 ′, 119 ″ include an intake chamber 402 that communicates with the low pressure side of the external refrigerant circuit via the suction port 401, and an external refrigerant circuit via the discharge port 403. A discharge chamber 404 communicating with the high pressure side of the cylinder, a cylinder chamber 405, a rotor 406 disposed in the cylinder chamber 405, and a movable vane that cooperates with the rotor 406 to divide the cylinder chamber 405 to form a working chamber. 407 and a vane compressor 400 that includes a vane compression mechanism that sucks and compresses the refrigerant in the suction chamber 402 into the working chamber and discharges the refrigerant into the discharge chamber 404, and a rotating shaft 408 that rotates the rotor 406. Propagation of the suction pressure pulsation generated with the suction operation of the vane compression mechanism to the external refrigerant circuit can be suppressed.

The present invention is applicable to various compressors such as a reciprocating compressor such as a swash plate compressor and a swing plate compressor, a scroll compressor, and a vane compressor.

It is sectional drawing of a variable capacity | capacitance swash plate type compressor provided with the flow-path change adapter which concerns on the Example of this invention. It is an II-II arrow line view of FIG. It is a perspective view of the flow-path change adapter which concerns on the Example of this invention. It is a perspective view of the flow-path change adapter which concerns on the Example of this invention. It is sectional drawing which shows the attachment condition of the flow-path change adapter which concerns on the Example of this invention. It is an arrow line view equivalent to FIG. 2 of the modification of a variable capacity swash plate type compressor provided with the flow-path change adapter which concerns on the Example of this invention. It is sectional drawing of a scroll compressor provided with the flow-path change adapter which concerns on the Example of this invention. It is sectional drawing of a vane compressor provided with the flow-path change adapter which concerns on the Example of this invention.

Explanation of symbols

100 Variable capacity swash plate compressor 106 Rotating shaft 107 Swash plate 114 Piston 116 Suction chamber 118 Suction port 119, 119 ', 119 "Channel change adapter 300 Scroll compressor 301 Suction port 400 Vane compressor 401 Suction port

Claims (5)

A suction chamber that communicates with the low pressure side of the external refrigerant circuit via the suction port, a discharge chamber that communicates with the high pressure side of the external refrigerant circuit via the discharge port, and sucks and compresses the refrigerant in the suction chamber and discharges it to the discharge chamber A suction flow path changing adapter that can be retrofitted to a suction port of a compressor that includes a compression mechanism that changes a suction flow path formed by the suction port when it is retrofitted to the suction port. The suction flow path changing adapter according to claim 1, wherein the flow path area of the suction flow path is reduced and changed. The suction flow path changing adapter according to claim 1, wherein the suction flow path is bent. 4. A compressor, wherein the suction flow path changing adapter according to claim 1 is attached to a suction port. The compressor according to claim 4, wherein the suction flow path changing adapter is attached to an inlet portion and an outlet portion of the suction port.

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