Mitsubishi Electric Corporation

Wahei Shingu

Hiroshi Yamamoto

Takuya Teramoto

Hiroaki Murakami

Hiroki Murakami

Kiyoshi Yamada

Seiji Nakashima

Hiroyasu Hayashi

Atsushi Nagata

Takashi Moriyama

Yasuaki Kato

Kenji Yano

Katsuhiro Fujiki

Junpei Mizobata

Takaaki Yasuda

A multi-blade centrifugal air-sending device includes an impeller including a back plate having a disk shape, a plurality of blades arranged at a peripheral portion of the back plate in a circumferential direction, and a rim having an annular shape and disposed to face the back plate, the rim fixing the plurality of blades; and a scroll casing having a spiral shape and housing the impeller, the scroll casing being configured such that air is introduced from the side of the rim and blown out to the outer peripheral side. The impeller is constituted by a metal. Each of the blades has a wall thickness constant from the side of the back plate to the side of the rim and extends toward the inner side further than an inner peripheral end of the rim.

Multi-blade centrifugal air-sending device

A compressor includes a container provided with an oil reservoir which is provided at a bottom portion of the container to allow oil to be collected in the oil reservoir. In the container, an electric motor mechanism, a rotary shaft, a compression mechanism, and a frame which fixes the compression mechanism to the container are provided. In the frame, a suction port is formed to cause refrigerant having flowed into the space to flow into the compression mechanism, and each of a suction portion and a connection port of the suction pipe, is located at a position which is higher than or the same as the level of the rotary shaft as seen in a rotation axial direction A rib in a first flow passage extends downwards in the direction of gravity from the connection port, extends through an area located above the oil reservoir, and reaches the suction port.

Compressor and refrigeration cycle apparatus

A propeller fan includes a boss and a blade. The boss rotates about an axis. The blade is provided at an outer periphery of the boss. The blade has a first region in a radial direction. In the first region, a blade chord center line shifts downstream toward an outer peripheral side. In a cylindrical cross section about an axis, a cross-sectional shape of the blade at least in the first region is an airfoil shape. When a cross section taken along the blade chord center line and projected onto a plane including the axis is viewed, the blade chord center line is a curve having a convex on a downstream side in an entire region in the radial direction.

Propeller fan and refrigeration cycle device

A vehicle air conditioning apparatus includes: a refrigerant circuit in which a compressor, a heat source side heat exchanger, an expansion device, and a load side heat exchanger are connected by pipes; and a controller that performs switching between a heating operation in which refrigerant in the refrigerant circuit circulates and a defrosting operation of the heat source side heat exchanger in which the refrigerant in the refrigerant circuit circulates in a direction opposite to a direction in the heating operation. The controller allows an airflow flowing from the load side heat exchanger into a cabin through a first air outlet in the heating operation, and an airflow flowing from the cabin into the load side heat exchanger through the first air outlet is produced in the defrosting operation of the heat source side heat exchanger.

Vehicle air conditioning apparatus, vehicle including the same, and method for controlling vehicle air conditioning apparatus

In a vehicular air conditioner in which a cooling operation and a heating operation are switched by switching a four-way valve, a pressure accumulator is provided in which a coolant, which is related to an aspiration pressure of a compressor, is accumulated when the compressor is operated, and a differential pressure, which is required for switching the four-way valve, between piston rooms is maintained, and the differential pressure, which is required for switching the four-way valve, is generated between the piston rooms of the four-way valve even after the compressor is stopped.

Vehicular air conditioner

An air-conditioning apparatus includes a compressor, a four-way valve, expansion means, and an indoor heat exchanger, and further includes a check valve disposed between a discharge side of the compressor and the four-way valve, a first solenoid valve disposed between the expansion means and the indoor heat exchanger, and a controller. Opening and closing of the first solenoid valve are controllable. The controller switches the four-way valve and switches the first solenoid valve between open and closed states. When a heating operation is stopped, the controller switches the four-way valve from connection for the heating operation to connection for a cooling operation, closes the first solenoid valve, and then stops the compressor.

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Tokyo, Japan

Wahei Shingu