Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Other

Takanori Okabe

Takashi Ban

Toshiro Fujii

Naoya Yokomachi

Yoshiyuki Nakane

Tatsuyuki Hoshino

Nobuaki Hoshino

Hidefumi Mori

Takahiro Moroi

Tatsuya Koide

Tatsuya Hirose

Masahiko Okada

Takahisa Ban

Hayato Ikeda

Kenji Takenaka

Shigeru Suzuki

Toshiro Higuchi

Takayuki Imai

Kiyoshi Yagi

Hiroyuki Gennami

Hisato Kawamura

Akira Nakamoto

Minoru Kato

Naofumi Kimura

Shinobu Aoki

Kazuhiro Nomura

Haruo Takagi

Fumihiko Kitani

Tsutomu Sato

Junichi Toyama

Yuri Otobe

Noriyuki Yamamoto

The air conditioning system may include a compressor a heating circuit and a capacity controller The compressor has a suction port a discharge port a driving unit provided within a driving chamber a first passage and a second passage The driving unit may decrease compressor output discharge capacity when the pressure within the driving chamber increases. The first passage may connect the discharge port to the driving chamber and the second passage may connect the driving chamber to the suction port The capacity controller may open the first passage when the refrigerant discharge pressure results predetermined pressure. By opening the first passage the high-pressure refrigerant may be released from the discharge port to the driving chamber through the first passage Thus, the pressure within the driving chamber may increase, the compressor output discharge capacity can be reduced, the abnormally high discharge pressure of the compressor can be alleviated by the reduction in the compressor output discharge capacity.

Air conditioning systems

To make it possible to provide high quality heating or warming with low environmental pollution for a low environmental pollution vehicle such as an electric vehicle or a hybrid vehicle, an automotive air-conditioning apparatus has a hot water circuit that includes a hot water heater (heat source unit), a hot water circulating pump and a heater core to thereby perform a heating operation for heating passenger compartment air wherein, an electric motor is excited under the condition that the rotation thereof is fixed to thereby generate heat in the electric motor. The generated heat is utilized as a heat source for the hot water heater. The restricting mechanism may include two electric motors which are rotated in opposite directions to each other or a lock mechanism. Also, a cooling operation for cooling the passenger compartment air may be performed by driving the compressor (heat source unit) with the electric motors, a dehumidifying operation may be performed by simultaneously effecting the heating and cooling operations, or a heat pump type heating operation may be performed by having the refrigerant circuit acting reversibly.

Automotive air-conditioning apparatus

An air conditioning system including a compressor, a heating circuit, and a capacity controller. The compressor has a suction port, a discharge port, a driving unit provided within a driving chamber, a first passage and a second passage. The driving unit may decrease compressor output discharge capacity when the pressure within the driving chamber increases. The first passage may connect the discharge port to the driving chamber and the second passage may connect the driving chamber to the suction port. The capacity controller may open the first passage when the refrigerant discharge pressure reaches or exceeds a predetermined set point pressure. By opening the first passage, the high-pressure refrigerant may be released from the discharge port to the driving chamber through the first passage. Thus, the pressure within the driving chamber may increase, the compressor output discharge capacity can be reduced, the abnormally high discharge pressure of the compressor can be alleviated by the reduction in the compressor output discharge capacity.

An air conditioning system includes an compressor,having a driving chamber,a suction port,and a discharge port,a first passage,that connects the discharge port,to the driving chamber,by opening a capacity control valve,a second passage,that connects the driving chamber,to the suction port,and a driving means,that can change the output discharge capacity of the compressor by changing the pressure in the driving chamber,The refrigerant can be released from the driving chamber,to the suction port,separately from the second passage,if the driving chamber reaches a predetermined high-pressure state. In such an air conditioning system, abnormally high pressure problems are overcome that utilizes a hot gas bypass heater. In particular, heating performance is improved, because high pressure refrigerant is not released from the hot gas bypass heater circuit into the cooling circuit. Further, an excessively high-pressure state in the driving chamber,can be prevented.

Air conditioning system

An air conditioning system,may include a compressor,having a driving chamber,a cooling circuit,a heating circuit,and capacity controllers,The compressor,may have a suction port,a discharge port,a driving unit,provided within the driving chamber,The driving unit,decreases compressor output discharge capacity when pressure within the driving chamber,increases. The first capacity controller,and the second capacity controller,are provided in series onto the capacity control passage,The first capacity controller,opens the capacity control passage,when compressor suction pressure Ps results predetermined low-pressure state during operation of the cooling circuit,and the second capacity controller,opens the capacity control passage,during operation of the cooling circuit. As the result, the heat exchanger,in the cooling circuit,is prevented from being frosted. The first capacity controller,opens the capacity control passage,during operation of the heating circuit,and the second capacity controller,opens the capacity control passage,when compressor discharge pressure Pd results predetermined high-pressure state during operation of the heating circuit,As the result, the heating circuit,is prevented from being damaged by an abnormally high discharge pressure.

An improved air conditioning system that cools or heats air very rapidly after being started. The system includes a main heater and a cooler which also functions as an auxially heater. The cooler includes a variable displacement compressor for compressing refrigerant gas. The compressor has a crank chamber and a discharge chamber. A crank mechanism is accommodated in the crank chamber. Compressed refrigerant gas is supplied to an external refrigerant circuit via the discharge chamber. The discharge chamber is connected to the external refrigerant circuit by a passage. A throttle valve is located in the passage. The throttle valve closes the passage immediately after the compressor is started, which quickly increases the pressure of the discharge chamber. As a result, the displacement of the compressor is increased quickly, and rapid heating or cooling results.

Air conditioning system and compressor

An air conditioning system,may include a cooling circuit,, a heating circuit,and a variable displacement compressor,as a driving source for both the heating and cooling circuits and may be utilized in a vehicle-mounted air conditioning system. In such case, the driving shaft,of the compressor,is connected to and driven by a car engine,. In order to decrease the compressor output discharge capacity during an abnormally high pressure state, high-pressure refrigerant in the discharge chamber,is released into the driving chamber,to increase the driving chamber pressure. The high-pressure refrigerant can be released from the discharge chamber,into the driving chamber,utilizing a variety of different structures.

An air conditioning system,may include a compressor,having a driving chamber,, a cooling circuit,, a heating circuit,and a controller,. This system may release high pressure refrigerant from the compressor discharge port,into the compressor driving chamber,by means of the controller,. The controller,may include a selector,, a first refrigerant releasing means,and a second refrigerant releasing means,. The selector,connects the discharge port,and the driving chamber,by both the first and second refrigerant releasing means,when discharge pressure of the refrigerant has reached a predetermined high-pressure state during operation of the heating circuit,. When the discharge pressure of the refrigerant results an abnormal high pressure state during the operation of the heating circuit,, the high pressure refrigerant is released from the discharge port,into the driving chamber,not only by a single refrigerant releasing means,but by double refrigerant releasing means,. Therefore, the high pressure refrigerant can be swiftly released into the driving chamber,to increase the pressure in the driving chamber,and the necessary time for reducing the compressor discharge pressure can be minimized. Thus, the abnormal high discharge pressure can be quickly alleviated.

An air conditioning system,may include a compressor,having a driving chamber,, a heating circuit,and a controller,. This system may release high pressure refrigerant from the compressor discharge port,into the compressor driving chamber,by opening a capacity control valve,when the discharge pressure of the refrigerant discharged from the compressor,exceeds a predetermined reference value. By increasing the pressure within the driving chamber,, the compressor discharge capacity can be reduced. As a result, the discharge pressure of the compressor,will be reduced by the reduction in the compressor discharge capacity. Further, the controller,may decrease the reference value in accordance with a value related to change in the discharge pressure. As a result, the capacity control valve,can be opened at an early stage of the increasing of the discharge pressure if the discharge pressure increases rapidly.

An improved viscous fluid type heater is disclosed. The heater has a heating chamber and a heat exchange chamber. The heating chamber accommodates viscous fluid and a rotor that rotates and shears the viscous fluid to produce heat. The heat exchange chamber allows circulating fluid to flow therethrough, whereby the heat is transmitted to the heat exchange chamber from the heating chamber to heat the circulating fluid. A reservoir chamber communicates with the heating chamber for an auxiliary reservoir of the viscous fluid. A stirring member is provided in the reservoir chamber and stirs the viscous fluid in the reservoir chamber.

Viscous fluid heater

A torque limiting apparatus is located between a power source and a driven apparatus. A number of breakable power transmission members connect a drive rotor to a driven rotor. The breakable members are fractured to disconnect the driven rotor from the drive rotor when the load applied by the driven apparatus exceeds a predetermined value. A promoting member is located near at least one of the power transmission members for promoting breakage when the load causes the driven rotor to rotate relative to the drive rotor. The breakable members are broken consecutively. The breakable members are not significantly affected by fatigue.

Torque limiting mechanism

A vehicle heater for generating heat for heating a vehicle compartment. The heater includes a rotor rotated by a vehicle engine. The rotor has a predetermined thickness and a peripheral edge. The heater further includes a heating chamber for accommodating the rotor and a fluid. The fluid is heated in the heating chamber when the rotor rotates. The heater further includes a reservoir. The fluid from the heating chamber is stored in the reservoir. The heater further includes a return passage connecting the reservoir and the heating chamber. The fluid returns from the heating chamber to the reservoir through the return passage. The return passage has an entrance opening in an inner wall of the heating chamber. The entrance opening faces the peripheral edge of the rotor, and the maximum width of the entrance opening is greater than the thickness of the rotor.

Heat generator for vehicles and its operating method

In the heater of the present invention, a heating chamber accommodates a viscous fluid. A rotor is located in the heating chamber. The rotor rotates and shears the viscous fluid to generate heat. The heat generated in the heating chamber is transferred to the heat exchanger and heats a fluid that flows through the heat exchanger. A reservoir stores the viscous fluid. The reservoir has an upper portion and a lower portion, and the lower portion has a greater volume than the upper position. A return passage connects the heating chamber to the reservoir so that the viscous fluid moves from the heating chamber to the reservoir when the rotor rotates. A supply passage connects the reservoir to the heating chamber so that the viscous fluid flows from the reservoir to the heating chamber.

A viscous fluid type heat generator including a housing assembly defining therein a heat generating chamber and a heat receiving chamber, a drive shaft rotatably supported by the housing assembly, a rotor element mounted to be rotationally driven by the drive shaft for rotation within the heat generating chamber, and a viscous fluid, held in a gap defined between the inner wall surfaces of the heat generating chamber and the outer surfaces of the rotor element, for heat generation under shearing stress applied by the rotation of the rotor element. At least a part of the housing assembly, which defines the heat generating chamber, is made of a material of which a linear expansion coefficient is larger than that of a material of the rotor element.

Viscous fluid type heat generator

A compressor mounted on a vehicle is disclosed. The compressor includes an apparatus for transmitting rotational power from an engine to drive shaft of the compressor via a pulley. The apparatus has a spring coupled to one of the pulley and the drive shaft. A deformable ring is coupled to the other one of the pulley and the drive shaft. The deformable ring is deformed by heat. The spring and the deformable ring are being held in abutment against each other by the force of the spring so as to transmit the rotational power to each other. A contact ring is interposed between the spring and the deformable ring. The contact ring has a rigidity larger than that of the deformable ring. The spring and the contact ring frictionally contact one another to generate the heat that deform the deformable ring when load generated in the drive shaft is in excess of a predetermined value.

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Kariya, Japan

Takanori Okabe