JPH0625574U - Multi-cylinder compressor - Google Patents

Abstract

(57) [Abstract] [Purpose] The amount of gas sucked into each suction hole can be made uniform, the compression load of each cylinder can be made uniform, and unpleasant noise of a multi-cylinder compressor can be reduced. To provide a cylinder type compressor. [Structure] The multi-cylinder compressor includes a cylinder head 16 and
It has a cylinder block 3 and a valve plate 10. In this multi-cylinder compressor, the suction holes 6a, 6b, 6 of the valve plate 10 are
In b ′, 6c, 6c ′, 6d, 6d ′, the diameter of the suction hole of the cylinder head 16 which is separated from the suction port 7 is made larger than the diameter of the suction hole close to the suction port 7, so that the cylinder bore 2a, 2b, 2b ', 2c, 2c', 2d,
The amount of gas inhaled in each of 2d 'was made uniform.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-cylinder compressor, and more particularly to a multi-cylinder compressor in which the compression load between each cylinder is constant.

[0002]

[Prior art]

 Conventionally, the rotary swash plate compressor shown in Fig. 2 has been proposed as a multi-cylinder compressor. As shown in FIG. 2, this multi-cylinder compressor has a drive that extends to a crank chamber 105 adjacent to a cylinder block 3 having a plurality of cylinders 2a (others not shown) provided at one end of a casing 101. It has an axis 106. Further, in the crank chamber 105, a swash plate 108 and a swing plate 109 provided along the drive shaft 106 are provided. The swash plate 108 is connected to the drive shaft 106 such that the inclination angle with respect to the drive shaft 106 is variable and the swash plate 108 rotates together with the drive shaft 106. The oscillating plate 109 faces the inclined surface of the swash plate 108 and oscillates as the drive shaft 106 rotates. A piston rod 113 is connected to the peripheral portion of the oscillating plate 109.

When the swash plate 108 is rotated by the rotation of the drive shaft 106, the swing plate 109 is prevented from rotating. The oscillating motion of the oscillating plate 109 causes the piston 114 to reciprocate in the cylinder bore 2a. The change in the inclination angle of the swash plate 108 changes the stroke of the piston 114, which changes the compression capacity.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and the two-dot chain line indicates the position of each cylinder bore. Further, FIG. 4 is an enlarged cross-sectional view of the main part centering on the cylinder bore 2a of the compressor.

Referring also to FIGS. 3 and 4, the valve plate 20 has suction holes 21 a, 21 b, 21 b ′, 21 c, 21 c ′, 21 d, 21 d ′ and discharge holes 22 a, 22 b, 22 b ′, 22 c, 22c ', 22d, 22d' are formed, and in FIG. 3, the suction chamber 17 and the discharge chamber 18 at the rear of the valve plate 20 are connected to the front two-dot chain lines 2a, 2b, through the suction hole 21 and the discharge hole 22, respectively. It communicates with the cylinder bores 2b ', 2c, 2c', 2d, 2d '. Reference numeral 7 is an intake port and reference numeral 11 is a discharge port. Further, as shown in FIG. 4, a suction valve 1 and a discharge valve 9 are arranged on the front and back of the valve plate 20, and the suction hole 21a and the discharge hole 22a are opened and closed by the suction valve 1 and the discharge valve 9. In FIG. 4, reference numeral 33 is packing, and reference numeral 1a is a discharge port provided in the valve 1.

[0006]

[Problems to be solved by the device]

 However, in the above-described multi-cylinder compressor, the distance from the suction port 7 of the cylinder head to each suction hole 21 of the valve plate 20 is not uniform. Therefore, in the suction hole 21d far from the suction port 7, the amount of gas sucked into the cylinder bore is smaller than that in the suction hole 21a adjacent thereto. As a result, the compression load of each cylinder is different, and sidebands are generated due to torque fluctuations, causing unpleasant noise in the multi-cylinder compressor.

Therefore, the technical problem of the present invention is to make the amount of gas sucked into each suction hole uniform, to make the compression load of each cylinder uniform, and to eliminate unpleasant noise generated from a multi-cylinder compressor. An object is to provide a multi-cylinder compressor that can be reduced.

[0008]

[Means for Solving the Problems]

 According to the present invention, a cylinder head having a suction chamber communicating with a suction port and a discharge chamber adjacent thereto via a partition, a cylinder block having a plurality of cylinder bores parallel to each other, the cylinder head and the cylinder block. And a valve plate formed with a suction hole and a discharge hole for communicating the suction chamber and the discharge chamber with each other in the cylinder bore, and the suction plate and the valve plate from the suction chamber in response to the reciprocating motion of the piston in the cylinder bore. A multi-cylinder compressor in which fluid is sucked into the cylinder bore through the suction hole and compressed fluid is discharged from the discharge hole into the discharge chamber. A multi-cylinder type compression characterized in that the diameter of the suction hole separated from the suction port is made larger than the diameter of the suction hole close to the suction port. It is obtained.

[0009]

[Action]

 In the present invention, the diameter of the suction hole is increased as the distance from the suction port of the cylinder head increases, so that the amount of refrigerant gas sucked into each cylinder becomes uniform, the compression load of each cylinder becomes constant, and the side due to torque fluctuation is generated. The band is reduced and the unpleasant noise of the multi-cylinder compressor is reduced.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a boundary portion between a valve plate and a cylinder block of a multi-cylinder compressor according to an embodiment of the present invention. Two-dot chain lines 2a, 2b, 2b ', 2c, 2c', 2d, 2d 'respectively indicate the positions of the cylinder bores that come into contact with the valve plate 10 from the front in FIG.

As shown in FIG. 1, in the multi-cylinder compressor, the outer wall of the cylinder head is in contact with the valve plate 10 covering one end surface of the cylinder block from the rear side. An intake valve 1 is provided between the cylinder bores 2a, 2b, 2b ', 2c, 2c', 2d, 2d 'of the cylinder block and the valve plate 10 as indicated by a chain double-dashed line. A discharge hole 5 and suction holes 6a, 6b, ... Are provided at positions corresponding to the outside and the inside of the suction valve 1 of the valve plate 10, respectively. The discharge hole 5 of the valve plate 10 is formed so as to overlap the discharge port 1a provided in the suction valve 1.

As shown in FIG. 1, the closer to the suction port 7, the smaller the diameter of the suction hole 6a, and the larger the distance from 6b, 6b ', 6c, 6c', the larger the diameter, and the farthest suction holes 6d, 6d. ′ Has the largest diameter. In this example, the diameters of the suction holes 6d, 6d 'are formed to be twice the diameter of the suction hole 6a.

Therefore, the amount of gas sucked into each of the cylinders 2a, 2b, 2b ', 2c, 2c', 2d, 2d 'from each suction port can be made uniform.

As described above, in the embodiment, the amount of refrigerant gas sucked into each cylinder bore can be made uniform, so that the compression load of each cylinder can be made uniform. As a result, the torque fluctuation of the multi-cylinder compressor becomes constant, and the sideband in 7 cylinders {(7n ± 1) th order, where n is an integer and 7 is the number of cylinder bores} can be reduced.

[0016]

[Effect of device]

 As described above, according to the present invention, it is possible to make the compression load of the cylinders uniform, which makes the torque fluctuations of the multi-cylinder compressor constant, which is not annoying to the multi-cylinder compressor. A multi-cylinder compressor that can reduce noise can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view of a boundary portion between a valve plate and a cylinder block of a multi-cylinder compressor according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a multi-cylinder compressor according to a conventional example.

FIG. 3 is a sectional view taken along line III-III of the multi-cylinder compressor of FIG.

FIG. 4 is an enlarged view of a main part of the compressor shown in FIG.

[Explanation of symbols]

1 Suction Valve 1a Discharge Ports 2a, 2b, 2b ', 2c, 2c', 2d, 2d '
Cylinder bore 3 Cylinder block 5 Discharge hole 6a, 6b, 6b ', 6c, 6c', 6d, 6d '
Suction hole 7 Suction port 9 Discharge valve 10, 20 Valve plate 11 Discharge port 17 Suction chamber 18 Discharge chamber 21a, 21b, 21b ', 21c, 21c', 21
d, 21d 'suction holes 22a, 22b, 22b', 22c, 22c ', 22
d, 22d 'Discharge hole 25 Valve retainer 101 Casing 105 Crank chamber 106 Drive shaft 108 Swash plate 109 Swing plate 113 Piston rod 114 Piston

Claims (1)

[Scope of utility model registration request] 1. A cylinder head having a suction chamber communicating with a suction port and a discharge chamber adjacent thereto through a partition wall, a cylinder block having a plurality of cylinder bores parallel to each other, and the cylinder head and the cylinder block. And a valve plate having a suction hole and a discharge hole for communicating the suction chamber and the discharge chamber with each other in the cylinder bore, and the suction from the suction chamber in response to the reciprocating motion of the piston in the cylinder bore. In a multi-cylinder compressor in which fluid is sucked into the cylinder bore through a hole and compressed fluid is discharged from the discharge hole into the discharge chamber, the suction port of the cylinder head among the suction holes of the valve plate A multi-cylinder type compressor characterized in that a diameter of a suction hole separated from is larger than a diameter of a suction hole near the suction port.