JP2013124641A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that when a refrigerant gas moves from a cylindrical part of a communication pipe to a suction hole, resistance of a flow passage increases and efficiency of a compressor decreases due to stepwise change of a cross-sectional shape and decrease of a flow passage area in the communication pipe, an outlet of the communication pipe and the suction hole.SOLUTION: A suction hole 152 is formed in a similar shape to that of an outlet 138 of a communication pipe so as to have a larger flow passage area than that of the outlet 138 of the communication pipe, and by forming a gradually changing part 139 of the communication pipe which continuously connects a cross-sectional shape of a cylindrical part 137 of the communication pipe and a cross-sectional shape of the outlet 138 of the communication pipe, the resistance of the flow passage generated when the refrigerant gas moves from the cylindrical part 137 of the communication pipe to the outlet 138 of the communication pipe is minimized.

Description

  The present invention relates to a compressor used in a refrigeration apparatus or the like.

  In recent years, high efficiency and high reliability for reducing power consumption are desired for compressors used in refrigeration apparatuses such as refrigerators and refrigerators.

  Conventionally, this type of compressor is characterized in that a part of a suction hole portion provided in a valve plate is curved for the purpose of improving efficiency and increasing reliability (for example, see Patent Document 1). is there.

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

  4 is a longitudinal cross-sectional view of a conventional compressor described in Patent Document 1, FIG. 5 is a cross-sectional view of main parts of the conventional compressor, and FIG. 6 is a front view of main parts of the conventional compressor.

  4 to 6, the lubricating oil 6 is accommodated in the sealed container 1, and the compression element 4 driven by the electric element 2 is accommodated in the sealed container 1.

  The compression element 4 includes a cylinder 22 in which a piston 24 connected to a shaft 30 via a connecting rod 25 reciprocates.

  Furthermore, a valve plate 44 having a suction hole 52 and a suction flow path 53 which are disposed at the opening end of the cylinder 22 and communicate with the inside of the cylinder 22 and a suction muffler 36 are provided.

  The suction muffler 36 includes a sound deadening space 41 and a communication pipe 42 communicating with the suction flow path 53.

  About the compressor comprised as mentioned above, the operation | movement is demonstrated below.

  Refrigerant gas flowing from an external cooling circuit (not shown) is sucked into the suction muffler 36 as the piston 24 reciprocates in the cylinder 22 by driving the electric element 2. The refrigerant gas is released into the sound deadening space 41, and then intermittently sucked into the cylinder 22 through the communication pipe 42 and the suction hole 52.

  The suction flow path 53 is configured to be partially curved and can change the flow direction of the refrigerant gas flowing from the communication pipe 42, so that when the refrigerant gas is sucked into the cylinder 22, The flow path 53 can make a smooth transition from the communication pipe 42 to the suction hole 52.

  As a result, the suction resistance of the refrigerant gas is suppressed to a minimum. As a result, the suction mass of the refrigerant gas per unit time is increased, and the efficiency of the compressor is improved.

JP-T-2004-503715

  However, in the configuration of the conventional compressor, the flow resistance increases because the shape changes stepwise and the flow area rapidly decreases in the communication pipe, the communication pipe outlet, and the suction hole. Had problems.

  The present invention solves the above-described conventional problems, eliminates a sudden change in the flow path area at the outlet of the communication pipe, suppresses the flow resistance of the refrigerant gas, and achieves higher efficiency. It is an object of the present invention to provide a hermetic compressor that can be used.

  In order to solve the above-described conventional problems, in the compressor of the present invention, the suction hole is formed in a shape similar to that of the communication pipe outlet and has a larger flow area than the communication pipe outlet.

  As a result, the refrigerant gas can be transferred from the communicating pipe outlet to the suction hole without causing flow path resistance.

  In the compressor according to the present invention, the communication pipe is formed with a communication pipe gradually changing portion that continuously connects the cross-sectional shape of the communication pipe cylindrical portion and the cross-sectional shape of the communication pipe outlet.

  Thereby, the flow path resistance when the refrigerant gas moves from the communication tube cylindrical portion to the communication tube outlet portion can be minimized.

  In the hermetic compressor of the present invention, a communication pipe outlet is formed on the end surface of the communication pipe of the suction muffler, the suction hole is formed in a shape similar to the communication pipe outlet, and the flow path is larger than the communication pipe outlet. It is formed so as to have an area, and the flow path resistance generated at the communication pipe outlet can be minimized.

The longitudinal cross-sectional view of the compressor in Embodiment 1 of this invention Sectional drawing of the principal part of the compressor in the embodiment The principal part expanded sectional view of the compressor in the embodiment Vertical section of a conventional compressor Cross section of the main part of a conventional compressor Front view of main parts of a conventional compressor

  According to a first aspect of the present invention, lubricating oil is stored in a sealed container, and an electric element and a compression element that is driven by the electric element and compresses refrigerant gas are accommodated, and the compression element includes a compression chamber. A cylinder to be formed, a valve plate that seals an end of the cylinder and has a suction hole, a suction lead that opens and closes the suction hole, a suction muffler that forms a silencing space and includes a communication pipe, and a cylinder head The communication pipe has a communication pipe outlet portion communicating with the suction hole, and is disposed so as to extend in a direction perpendicular to the axial center of the suction hole, and the communication pipe outlet portion and the gasket The suction hole that is in contact with each other is formed in a shape similar to that of the communication pipe outlet and has a larger flow area than the communication pipe outlet.

  As a result, the flow resistance when the refrigerant gas moves from the communicating pipe outlet to the suction hole is reduced, the suction mass per unit time is increased, and a hermetic compressor that achieves high efficiency is provided. be able to.

  According to a second aspect of the present invention, in the first aspect of the present invention, the tip of the communication pipe outlet extends parallel to the suction hole axis and is inserted into the suction hole.

  Accordingly, the displacement between the communication pipe outlet and the suction hole is prevented, and the reduction of the flow path area due to the overlap of the communication pipe outlet and the suction hole can be prevented. In addition to the effect, higher efficiency can be realized.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a communication pipe gradually connecting the cross-sectional shape of the communication pipe cylindrical part and the cross-sectional shape of the communication pipe outlet part to the communication pipe outlet part. It forms a deformed part.

  Thereby, the flow resistance when the refrigerant gas moves from the communication pipe to the communication pipe outlet is reduced, and the suction mass per unit time is increased. In addition, higher efficiency can be realized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments. Further, the same elements are denoted by the same reference numerals, and therefore description thereof may be omitted.

(Embodiment 1)
As shown in FIG. 1, the sealed container 101 contains a lubricating oil 106 and a compression element 104 driven by the electric element 102.

  The compression element 104 includes a cylinder block 120 that forms a cylinder 122, a piston 124, a shaft 130, a connecting rod 125, a valve plate 144 that seals an end of the cylinder 122 to form a suction hole 152 and a discharge hole, A suction lead 154 that opens and closes the suction hole 152, a suction muffler 136, and a cylinder head 160 that forms a discharge space (not shown) and a discharge lead that opens and closes the discharge hole are provided.

  The piston 124 is inserted into the cylinder 122 so as to be slidable back and forth, and is connected to the shaft 130 by a connecting rod 125.

  Next, the configuration of the suction muffler 136 will be described.

  The suction muffler 136 is formed of a resin such as PBT, and has a suction port, a muffler space 141, and a communication pipe 142.

  The communication pipe 142 has a communication pipe cylindrical part 137 disposed so as to extend in a direction perpendicular to the axis of the suction hole 152 and a communication pipe outlet part 138 that contacts the suction hole 152 via a gasket. doing.

  More specifically, the communication tube outlet portion 138 includes a communication tube gradual change portion 139 and a communication tube extending portion 140 that can be inserted into the suction hole 152.

  The communication pipe outlet 138 is formed in a shape similar to the suction hole 152 and has a smaller cross-sectional area than the suction hole 152.

  Next, the valve plate 144 will be described.

The valve plate 144 is formed of, for example, a material such as sintered metal, and a suction hole fitting portion 153 into which the communication pipe extending portion 140 of the suction muffler 136 can be inserted into the suction hole 152 of the valve plate 144. Have.

  The suction pipe fitting part 153 and the communication pipe extension part 140 of the suction muffler 136 are made of different materials, and therefore have a certain clearance in consideration of the mutual linear expansion coefficient.

  About the compressor comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When electricity is supplied to the electric element 102, the shaft 130 is driven to rotate.

  The rotational movement of the shaft 130 reciprocates the piston 124 by the connecting rod 125, and the refrigerant gas is sucked and compressed in the cylinder 122.

  At this time, the refrigerant gas flowing from the cooling circuit (not shown) is once opened in the sealed container 101 and then sucked into the suction muffler 136 through the suction port.

  The refrigerant gas sucked into the suction muffler 136 is released into the silencing space 141 and then sucked into the cylinder 122 through the communication pipe 142 and the suction hole 152.

  The refrigerant gas sucked into the cylinder 122 is compressed by the piston 124 and discharged again to the external cooling circuit (not shown) through the discharge space (not shown) of the cylinder head 160.

  Here, the communication pipe 142 includes a communication pipe gradual change portion 139, and is caused by a sudden change in cross-sectional shape by continuously changing the shape from the communication pipe cylindrical portion 137 toward the communication pipe outlet portion 138. Disturbance of the refrigerant flow can be prevented.

  Further, the flow passage area of the suction hole 152 is slightly larger than the flow passage area of the communication pipe outlet portion 138, thereby eliminating the flow resistance generated when the communication pipe outlet portion 138 shifts to the suction hole 152. Can do.

  Further, by inserting the communication pipe extension part 140 into the valve plate 144, it is possible to prevent the displacement of the suction hole 152 and the communication pipe outlet part 138, and the suction hole 152 and the communication pipe outlet part 138 are overlapped. A reduction in the channel area can be prevented.

  As described above, the compressor according to the present invention can realize a highly efficient compressor in which the refrigerant circulation amount is increased and the work amount per unit time is increased. Therefore, by mounting the compressor of the present invention, it can be effectively applied to not only ordinary freezing and refrigeration equipment but also large-sized freezing and refrigeration equipment for air conditioning and business use.

DESCRIPTION OF SYMBOLS 101 Airtight container 102 Electric element 104 Compression element 106 Lubricating oil 120 Cylinder block 122 Cylinder 124 Piston 125 Connecting rod 130 Shaft 136 Suction muffler 137 Communication pipe cylindrical part 138 Communication pipe outlet part 139 Communication pipe gradual change part 140 Communication pipe extension part 141 Silencer Space 142 Communication pipe 144 Valve plate 152 Suction hole 153 Suction hole fitting portion 154 Suction lead 160 Cylinder head

Claims (3)

Lubricating oil is stored in a sealed container, and an electric element and a compression element that is driven by the electric element and compresses refrigerant gas are accommodated. The compression element seals a cylinder that forms a compression chamber, and an end of the cylinder. A valve plate having a suction hole and a discharge hole, a suction lead that opens and closes the suction hole, a suction muffler that forms a silencing space and includes a communication pipe, and a cylinder head. The suction port has a communication pipe outlet portion that communicates with the suction hole, and is disposed so as to extend in a direction perpendicular to the axis of the suction hole, and the suction hole that is in contact with the communication pipe outlet portion via a gasket includes: The compressor which is formed in a similar shape to the communication pipe outlet and has a larger flow area than the communication pipe outlet. 2. The compressor according to claim 1, wherein a leading end of the communication pipe outlet extends parallel to an axis of the suction hole and is inserted into the suction hole. The compressor according to claim 1 or 2, wherein a communication pipe gradual change part that continuously connects a cross-sectional shape of the communication pipe cylindrical part and the communication pipe outlet part is formed in the communication pipe outlet part.