Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Masato Yosomiya

Fumitake Unezaki

Masanori Aoki

Tetsuji Saikusa

Makoto Saitou

Takashi Okazaki

Hirokazu Taniguchi

Yoshihiro Sumida

Tetsuya Yamashita

Akihiro Nishida

Kazuhiko Shiraishi

Mamoru Hamada

So Nomoto

Shogo Tamaki

Hirokuni Shiba

Tatsunori Sakai

A first air-supply port and a first air-exhaust port each disposed in a first zone and used to ventilate the first zone are provided. Further, a second air-supply port and a second air-exhaust port each disposed in a second zone and used to ventilate the second zone are provided, and the second zone is adjacent to the first zone. The first air-supply port, the first air-exhaust port, the second air-supply port, and the second air-exhaust port are disposed on one plane. The first air-supply port, the first air-exhaust port, the second air-supply port, and the second air-exhaust port are disposed in order of the first air-exhaust port, the first air-supply port, the second air-supply port, and the second air-exhaust port in one direction, or in order of the first air-supply port, the first air-exhaust port, the second air-exhaust port, and the second air-supply port in one direction.

Ventilation system, air-conditioning system, and method of installing air-conditioning system

Heating equipment, including a first heat exchanger, a compressor, a second heat exchanger, and a first expansion valve that decompresses a refrigerant flowing from the second heat exchanger to the first heat exchanger, are connected so as to circulate the refrigerant. A third heat exchanger provides heat of the refrigerant flowing from the second heat exchanger to the first heat exchanger to the refrigerant flowing from the first heat exchanger toward the compressor. An injection circuit merges part of the refrigerant flowing from the second heat exchanger to the first heat exchanger with the refrigerant that is sucked by the compressor. An injection expansion valve is installed in the injection circuit and decompresses the refrigerant flowing in the injection circuit. A fourth heat exchanger is installed in the injection circuit to supply heat of the refrigerant flowing from the second heat exchanger toward the first heat exchanger to the refrigerant flowing in the injection circuit.

Air conditioner heat pump with injection circuit and automatic control thereof

A ventilation and air conditioning apparatus for a vehicle includes: a ventilator that sucks air from outside the vehicle; an air conditioner that conditions air inside the vehicle; a duct for fresh outside air that connects the ventilator with the air conditioner so as to supply the air that the ventilator has sucked from outside the vehicle to the air conditioner; and a duct for conditioned air that supplies the conditioned air blown out from the air conditioner to inside the vehicle. The duct for fresh outside air is branched so as to be connected to the duct for conditioned air. With this configuration, even if the operation of the air conditioner is stopped due to, e.g., a leakage of a flammable refrigerant, an amount of ventilation can be secured in the vehicle.

Ventilation and air conditioning apparatus for vehicle

Disclosed is a non-azeotropic refrigerant mixture containing tetrafluoropropane as a high-boiling refrigerant and a refrigeration cycle apparatus in which a non-azeotropic refrigerant mixture containing tetrafluoropropane as a high-boiling refrigerant circulates through a refrigeration cycle so as to avoid occurrence of negative pressure in a low-pressure circuit. The non-azeotropic refrigerant mixture is characterized in that a mixing ratio of a high-boiling refrigerant and a low-boiling refrigerant is determined so that a saturated vapor line where pressure is 0.00 MPa is not higher than &#x2212;45&#xb0; C. in a low-pressure circuit formed between the decompressor to the compressor.

Non-Azeotropic refrigerant mixture and refrigeration cycle apparatus

Refrigeration/air conditioning equipment includes a first internal heat exchanger for exchanging heat between a refrigerant to be sucked in a compressor and a high-pressure liquid refrigerant, an injection circuit for evaporating a bypassed high-pressure liquid at intermediate pressure and injecting the vaporized refrigerant into the compressor, a second internal heat exchanger for exchanging heat between the high-pressure liquid refrigerant and the refrigerant to be injected, and a heat source for heating the refrigerant to be injected.

Refrigeration/air conditioning equipment

The present invention is directed to a refrigerant filling apparatus of the refrigerating and air conditioning apparatus that can automatically finish filling of a refrigerant after filling to an appropriate amount, without a need to install an extra valve except for a valve provided at a refrigerant cylinder, in between the refrigerating and air conditioning apparatus and the refrigerant cylinder, which is necessary for filling the refrigerant. The refrigerant filling apparatus of the refrigerating and air conditioning apparatus, which includes: a refrigerant circuit having a compressor, a four-way valve, an indoor side heat exchanger, a pressure reducing solenoid valve, an outdoor side heat exchanger, and an accumulator; a refrigerant cylinderconnected to the refrigerant circuit; a control unit that controls filling of the refrigerant from the refrigerant cylinderto the refrigerant circuit and decides refrigerant filling modes; and a display unit installed to the control unit and displays the refrigerant filling modes.

Refrigerant filling apparatus of refrigerating and air conditioning apparatus and refrigerant filling method of refrigerating and air conditioning apparatus

Growing community of inventors

Tokyo, Japan

Masato Yosomiya