Kabushiki Kaisha Toyota Jidoshokki

Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

General Electric Company

Yoshinori Inoue

Tomoji Tarutani

Akinobu Kanai

Masaki Ota

Hiroyuki Nakaima

Naoki Koeda

Atsuhiro Suzuki

Masahiro Kawaguchi

Tomohiro Wakita

Masaya Sakamoto

Shinya Yamamoto

Satoshi Umemura

Hisato Kawamura

Hirotaka Kurakake

Kenta Nishimura

Osamu Nakayama

Hirokazu Mesaki

Ken Suitou

Hiroyuki Yoshida

Yuji Hashimoto

Kei Nishii

Kazuhiko Minami

Masafumi Ito

Yasunori Ueda

Kazuhiro Nomura

Suehiro Fukazawa

Yoshinobu Ishigaki

Taro Ozeki

Atsushi Shibata

Kenji Mochizuki

Yoichi Takashima

Hisaya Kondo

Koji Ishii

Kazuya Shinmyo

Atsuo Sakagami

Terunao Kono

Toru Mizutani

Atsuo Sumi

A piston compressor includes a housing including a cylinder block having cylinder bores. The housing has a discharge chamber, a swash plate chamber, and an axial hole. The piston compressor includes a drive shaft, a fixed swash plate, a piston, a discharge valve, a rotating body, and a control valve. The rotating body has a second communication passage that communicates with first communication passages intermittently by rotation of the drive shaft. A flow rate of refrigerant gas discharged from the compression chambers into the discharge chamber decreases when a communication angle around the axis becomes large per a rotation of the drive shaft depending on a position of the rotating body in the direction of the axis. The piston compressor includes a suction throttle that decreases the flow rate of refrigerant gas in the compression chamber when the communication angle becomes large based on the control pressure.

Piston compressor including a suction throttle

A piston compressor includes a housing, a drive shaft, a fixed swash plate, a plurality of pistons, a movable body, and a control valve. The housing includes a cylinder block having a plurality of cylinder bores and a plurality of first communication passages. The movable body has a second communication passage that intermittently communicates with each of the first communication passages by rotation of the drive shaft. A flow rate of refrigerant discharged from a compression chamber into a discharge chamber changes according to a position of the movable body in a direction of an axis of the drive shaft. The control valve is configured to control a control pressure. The first communication passages are connected to the second communication passage by the movable body and disconnected from the second communication passage by the drive shaft.

Piston compressor

A relief valve for a compressor includes a valve body, a relief port, a cap and a cover. The relief port is formed in the end of the valve body and refrigerant gas is blown out through the relief port if pressure in the compressor is excessively increased. An engaging portion is formed in the cover so as to be engageable with the valve body such that the cover is prevented from moving relative to the valve body. With the cover is mounted on the valve body through the cap, the relief port is covered by the end of the cap, a first clearance is formed between the ends of the cap and the valve body so as to be in communication with the relief port, and a flowing passage for refrigerant gas blown out through the relief valve is formed from the relief port through the first clearance.

Compressor relief valve cap and cover

The compressor is provided with an oil separator for separating oil from refrigerant gas introduced into a separation chamber, an annular space for reserving oil separated from the refrigerant gas, and a reservoir chamber for reserving the thus separated oil. The oil separator is provided in a cylindrical hole formed in a discharge chamber from which the refrigerant gas is discharged and a lid for partitioning the cylindrical hole from the discharge chamber is provided in the cylindrical hole. The oil separator introduces the refrigerant gas from the discharge chamber to the separation chamber via the introduction passage. The annular space is provided around the lid and connected to the reservoir chamber via an oil passage. The reservoir chamber is connected to a crank chamber of a pressure lower than that in the discharge chamber.

Compressor

In a structure for mounting a filter in a compressor, a mounting member is connected to the filter. A receiving hole is formed in a housing of the compressor for receiving therein the mounting member. A first fitting portion is formed on an inner circumferential surface of a holding portion of the filter. A second fitting portion is formed on an outer circumferential surface of the mounting member for having fitting relation to the first fitting portion for an overlap distance in a radial direction of the receiving hole. When the mounting member is received in the receiving hole with the fitting relation, the filter is disposed in a fluid passage of the housing. A clearance having a dimension is formed between an outer circumferential surface of the holding portion and an inner circumferential surface of the receiving hole. Minimum value of the dimension is smaller than the overlap distance.

Structure for mounting a filter in a compressor

A compressor comprises a suction passage; an oil reservoir for storing a lubricating oil which is separated from a refrigerant gas having a discharge pressure; and a throttle valve provided in the suction passage and having a valve body for adjusting an opening degree of the suction passage based on a differential pressure applied to the valve body. The suction passage has an upstream suction passage which is located upstream of the throttle valve. The compressor comprises a lubricating oil passage connecting the oil reservoir to the upstream suction passage for the lubricating oil in the oil reservoir to flow to the upstream suction passage therethrough.

Compressor and method for operating the same

A structure for sensing refrigerant flow rate in a compressor. The structure includes a passage forming member, a restriction hole, a differential pressure-type flow rate sensor, and a partition plate. The compressor includes a housing connected to an external refrigerant circuit via a refrigerant passage. The passage forming member is connected to an outer surface of the housing and forms a part of the refrigerant passage. The restriction hole divides the refrigerant passage into an upstream passage and a downstream passage. The upstream passage is formed in either the housing or the passage forming member. The sensor is provided in the passage forming member and detects pressure in the upstream passage and pressure in the downstream passage to sense flow rate of refrigerant in the refrigerant passage. The partition plate is disposed between the housing and the passage forming member. The restriction hole is formed in the partition plate to extend through the partition plate.

Structure for sensing refrigerant flow rate in a compressor

A refrigerant gas compressor includes a cylinder block formed with plural cylinder bores, a first housing disposed at the one end of the cylinder block, a second housing disposed at the other end of the cylinder block, a drive shaft supported by the cylinder block and one of the housings, a crank chamber formed in one of the housings, a suction chamber and a discharge chamber formed in one of the housings, a valve plate assembly disposed between the cylinder block and at least one of the housings, a stepped portion formed adjacent to the valve plate assembly to receive a part of the valve plate assembly. A storage chamber is provided for reserving therein oil separated from refrigerant gas. An oil groove is formed by the stepped portion and the valve plate assembly and connecting the storage chamber with one of the crank chamber and the suction chamber.

Refrigerant gas compressor

A variable displacement compressor includes a housing, a rotary shaft, a swash plate, a suction pressure region, a suction throttle valve, an oil reservoir, a lubricating oil passage, a gas flow passage, a communication passage, and a throttle mechanism. The suction-pressure region includes a suction chamber and a suction passage. The suction throttle valve is arranged in the suction passage and defines an upstream suction-pressure region and a downstream suction-pressure region. The lubricating oil passage connects the oil reservoir to the upstream suction-pressure region. The gas flow passage connects the crank chamber to the suction chamber. The communication passage connects the lubricating oil passage to at least one of the downstream suction-pressure region, the gas flow passage and the crank chamber. The throttle mechanism is provided in the lubricating oil passage between the oil reservoir and a position where the communication passage connects to the lubricating oil passage.

Variable displacement compressor

A compressor having a discharge chamber into which compressed refrigerant gas is discharged, a discharge passage connected to the discharge chamber, an oil separation device that centrifugally separate oil from the refrigerant gas, an oil reservoir chamber that communicates with a separation chamber through an oil passage and retains the oil separated from the refrigerant gas, and a filter provided between the separation chamber and the oil passage is disclosed. The oil reservoir chamber communicates with a low pressure zone in the compressor the pressure of which is lower than the pressure in the discharge chamber. The oil reservoir chamber thus supplies the separated oil to the low pressure zone. The oil separation device is arranged in the discharge passage in such a manner as to define the separation chamber. The oil separation device centrifugally separate the oil from the refrigerant gas by causing swirling of the refrigerant gas that has been sent to the separation chamber. The filter extends in a swirling direction of the refrigerant gas in the separation chamber.

A variable displacement compressor includes a housing assembly. A displacement control structure for the variable displacement compressor includes a passage forming member, a flat partition and a displacement control valve. The passage forming member is connected to an exterior surface of the housing assembly for forming a refrigerant passage for allowing the refrigerant to be discharged out from the compressor to an external refrigerant circuit. The flat partition is interposed between the passage forming member and the housing assembly. A throttle penetrates through the partition, which divides the refrigerant passage into an upstream passage and a downstream passage. The displacement control valve is provided in the passage forming member. The displacement control valve senses pressure of refrigerant in the upstream passage and pressure of the refrigerant in the downstream passage to control flow rate of the refrigerant flowing through a supply passage.

Displacement control structure for a variable displacement compressor

The compressor has a differential pressure type flow rate detector that obtains the pressure in an upstream passage and the pressure in a downstream passage to detect a refrigerant flow rate within a refrigerant passage. The detector has an accommodation chamber, and a partition body slidably accommodated within the accommodation chamber. The partition body comparts the accommodation chamber into a high pressure chamber to which the pressure in the upstream passage is introduced, and a low pressure chamber to which the pressure in the downstream passage is introduced. The compressor has an oil separator having an oil introduction passage connected to the oil separating chamber and a high pressure introduction passage introducing the pressure in the upstream passage to the high pressure chamber. The oil introduction passage introduces the oil separated from the refrigerant by the oil separator to a pressure zone other than a discharge pressure zone.

A flow meter for a variable displacement compressor comprises a movable body operable to move by differential pressure, a magnet provided in the movable body, a magnetic sensor for detecting change of magnetic flux density of the magnet, a flow passage for refrigerant gas which is discharged from cylinder bores to flow therethrough, a sealed chamber connected perpendicularly to the flow passage and accommodating therein the movable body, an urging member for urging the movable body into the flow passage, a clearance formed between a movable body and an inner wall surface of the flow passage, a by-pass passage opened and closed as the movable body is moved in an axial direction of the movable body, and a communication passage for introducing into the sealed chamber the refrigerant gas in a downstream flow passage of the flow passage which is located downstream of the movable body.

Flow meter for variable displacement compressor

A method of adjusting a rotary machine includes the steps of press fitting an adjustable member to one of a housing and a rotary body where the adjustable member is arranged to a reference position at which movable amount or a rotary body is zero, and adjusting the movable amount of the rotary body in a direction of a rotary axis to the predetermined amount by varying a position of the adjustable member that is press-fitted to the one of the housing and the rotary body from the reference position by the predetermined amount in a direction in which the movement restricting part and the contacting part contacting with each other are separated from each other.

Method of adjusting rotary machine

A vehicle air conditioning apparatus includes a refrigerant circulation circuit. The vehicle air conditioning apparatus has a variable displacement type compressor, a first pressure monitoring point, a second pressure monitoring point and an oil separator in the refrigerant circulation circuit. Also, the vehicle air conditioning apparatus has a control valve in the compressor. The compressor compresses refrigerant gas. Displacement of the compressor is variable. The refrigerant gas includes oil. The second pressure monitoring point is located more downstream than the first pressure monitoring point. The control valve controls the displacement based on differential pressure between the first and second pressure monitoring points. The oil separator is located between the first and second pressure monitoring points in order to separate the oil from the compressed refrigerant gas, thereby the oil separator serves as means for manifesting the differential pressure.

Growing community of inventors

Kariya, Japan

Yoshinori Inoue