Daikin Industries, Ltd.

Yoshitaka Matsugi

Tooru Fujimoto

Gakuto Sakai

Kousuke Hirai

Kazuhiro Shioyama

Ryou Fujimoto

Tsuyoshi Yamaguchi

Takahiko Nishida

Akiyoshi Yamamoto

Kenichi Maegaito

Takashi Takahashi

Takayuki Sunayama

Yasunobu Okumura

Hiroyuki Kondou

Akira Fujimoto

Nobumasa Takeuchi

An air conditioning and ventilating system including: an air conditioning device including a heat exchanger configured to generate conditioned air by heat exchange with a refrigerant; a ventilation device communicatively connected to the air conditioning device and including a supply air fan and/or an exhaust fan; an airflow volume detection unit configured to detect an airflow volume equivalent value of the ventilation device; and a control unit. On determination that the airflow volume equivalent value acquired from the airflow volume detection unit is equal to or less than a first predetermined value, the control unit sets an operation of the air conditioning device to a stop state.

Air conditioning and ventilating system

A system includes an air conditioning device with a heat exchanger that sends conditioned air to an air conditioned space, a ventilation device that ventilates the air conditioned space, a refrigerant sensor that detects a concentration of a refrigerant in the air conditioned space, and a control unit that controls operations of the air conditioning device and ventilation device. On determination that the refrigerant concentration acquired from the refrigerant sensor exceeds a first predetermined value, the control unit sets an operation of a compressor of the air conditioning device to a stop state and sets the ventilation device to an operating state. On determination that the refrigerant concentration that has exceeded the first predetermined value becomes equal to or less than the first predetermined value, the control unit continues the stop state of the compressor and operating state of the ventilation device until a predetermined timing.

Air conditioning and ventilating system that enhance ventilation in response to a refrigerant leakage

A total heat exchange element includes a plurality of partition members made of a material that contains cellulose as a main component, a spacing member made of a material that contains cellulose as a main component, and an adhesive portion bonding the partition members and the spacing member together. The partition members are configured as flat sheets, and are stacked with a predetermined distance between them. The spacing member is disposed between adjacent ones of the stacked partition members to maintain the distance between them. The total heat exchange element has a first air flow path and a second air flow path alternately formed with one of the partition members interposed between the first and second air flow paths. The adhesive portion contains, as an adhesive component, cellulose having a smaller diameter than both of the cellulose forming the partition members and the cellulose forming the spacing member.

Total heat exchange element and method for manufacturing same

A ventilation system includes a first ventilation device, a second ventilation device, a sensor, and an electronic controller. The first ventilation device includes a first fan. The second ventilation device includes a second fan. The sensor is attached to the first ventilation device. The sensor is configured to detect a state of air and to transmit a detection signal indicative of the detected state of air. The electronic controller is configured to receive the detection signal of the sensor and to control the first ventilation device and the second ventilation device based on the detection signal.

Ventilation system

An air conditioning system includes: an air conditioner that generates conditioned air by heat exchange with a refrigerant and supplies the conditioned air to an air conditioning target space; a refrigerant sensor that detects refrigerant leakage; a ventilator that ventilates the air conditioning target space; and a controller. The ventilator includes: a total heat exchanger; a first air supply path and a first air exhaust path that connect the air conditioning target space and an outside of the air conditioning target space via the total heat exchanger; a second air supply path that connect the air conditioning target space and the outside of the air conditioning target space without passing through the total heat exchanger; an air supply fan that supplies air from the outside of the air conditioning target space into the air conditioning target space via the first air supply path and the second air supply path.

Air conditioning system

A ventilation system includes a plurality of ventilation devices, a sensor, a setting unit, and a transmitter-receiver. The sensor is attached to a predetermined ventilation device of the plurality of ventilation devices. The sensor detects a state of air. The setting unit sets, from the plurality of ventilation devices, a first ventilation device to which the sensor is to be attached, and a second ventilation device with which a detection signal of the sensor is to be shared. The transmitter-receiver receives the detection signal of the sensor and transmits the detection signal to control devices of the first and second ventilation devices. The first and second ventilation devices are set in the setting unit. Each of the control devices of the first and second ventilation devices controls an associated one of the ventilation devices based on the detection signal transmitted from the transmitter-receiver.

A total heat exchanger exchanges heat between air flowing through an air supply passage and air flowing through an air exhaust passage. An air supply fan transfers air from the outside of a room into the room through the air supply passage. If the temperature of outdoor air (OA) is below a lower temperature threshold (Tth), a controller intermittently stops the air supply fan in response to an index of the moisture content in room air (RA) such that as the stage of the index of the moisture content depending on the moisture content in the room air (RA) shifts toward higher stages, the period of time during which the air supply fan is at rest in an intermittent operating cycle increases.

Ventilation device

When the air conditioner implements the temperature controlling operation, the ventilator performs ventilation in a normal ventilation mode where a ventilation amount is set at a certain ventilation amount or more. When the air conditioner implements the operation not intended for temperature control, the ventilator performs ventilation in a ventilation suppressed mode where the number of rotations of an exhaust fan is made greater than that of an air supply fan to place indoor space in a negative pressure and ventilation is performed at an amount smaller than the certain ventilation amount or ventilation is stopped. In the ventilation suppressed mode, a ventilation amount is set to be smaller in response to a greater heating load that is increased by ventilation performed during the operation not intended for temperature control.

A first element and a second element are disposed in postures such that the length directions of the elements are parallel to each other. The first element is disposed in a posture such that a pair of opposing surfaces where a longitudinal flow passage is open is parallel to one main plate. The second element is disposed in a posture such that a pair of opposing surfaces where a longitudinal flow passage is open is parallel to the one main plate. A mixing flow passage formed as a result of the first element and the second element being disposed with a gap therebetween in a facing direction of side plates is provided between a transverse flow passage of the first element and a transverse flow passage of the second element.

The present invention provides a heat exchanger unit that can save space, even when performing air conditioning in addition to ventilation. The heat exchanger unit performs heat exchange ventilation with a supply air channel flowing from an outdoor space to an indoor space and an exhaust air channel flowing from the indoor space to the outdoor space and includes an optical deodorization portion and a first blowing portion. The optical deodorization portion is provided so as to be linked to at least the indoor space and performs air conditioning with a circulation channel. The circulation channel is provided in the vicinity of either the supply air channel or the exhaust air channel. The first blowing portion includes a double-suction first impeller having a first suction inlet and a second suction inlet. Here, one of the supply air channel and the exhaust air channel that is provided in the vicinity of the circulation channel is provided at the first suction inlet side of the first impeller. The circulation channel is provided at the second suction inlet side of the first impeller.

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Osaka, Japan

Yoshitaka Matsugi