Mitsubishi Denki Kabushiki Kaisha

Tetsuji Okada

Hidenori Ishioka

Katsuyuki Aoki

Hiroyuki Umemura

Kenji Togashi

Sakuo Sugawara

Masanori Hara

Yu Seshimo

Kiyoshi Sakuma

Seiji Kubo

Kisuke Yamazaki

Hideo Igarashi

Kazuhiro Maruyama

Isao Arai

Yuichi Akiyama

In an air conditioning system of the type having air volume to each room controlled by individual dampers the improvement comprising a damper control unit for, on a trial mode, gradually changing the opening angle of each damper while the other dampers are kept fully closed; air volume measurement unit for detecting the air volume from a blower to measure the actual air volume; pressure difference measurement unit for detecting a difference in pressure between the outlet air and the inlet air of an indoor heat exchanger unit to measure an air feeding pressure difference with respect to an actual duct system; air volume calculation unit for finding the relationship among the air volume passing through the respective dampers, the opening angles of the respective dampers and the air feeding pressure difference, based on outputs from the pressure difference measurement unit, the air volume measurement unit and the damper control unit, to find air feeding resistance in the respective ducts.

Air conditioning system

A control device for an air conditioner operable in the heating and cooling operation mode is disclosed, which device comprises a 'too hot' and a 'too cold' switch which is operated by the user when he feels that it is too hot or too cold in the room conditioned by the air conditioner. When a first operation of one of these switches by the user takes place, a mode selector automatically selects the operation mode of the air conditioner, and the control of the air conditioner is started immediately. The setting or target temperature is automatically renewed every time a further operation of one of the switches is made, so that the target temperature may be adjusted to the individual preference of the user. The fan speed of the air conditioner may also be modified according to the frequency of inputs through the switches.

Control device for an air conditioner

In an air flow control device for an air conditioner including a heat exchanger arranged so as to face an inlet port, and upper and lower air-blowing fans disposed in upper and lower outlet ports, respectively, wherein air sucked through the inlet port and the heat exchanger is directed to the fans, there are further provided input producing means for outputting a condition required for the outlet air from the outlet ports and phenomenon information on the outlet air, upper and lower fan operation mode determining means for determining the operation modes depending on the output signals from the input producing means, upper and lower fan operation mode control means for controlling the operation of both fans at the operation mode according to the commands from the operation mode determining means, and control means for optimizing the outlet air to a user.

Air flow control device for an air conditioner

An air conditioning device comprises a refrigerant compression cycle having an electrically driven compressor, an electric motor for driving the compressor, frequency changing means for changing the frequency of a.c. power to be applied to the motor, an outlet port for blowing off conditioned air, flowing direction changing means for changing the flowing direction of the conditioned air from the outlet port, a switch which is actuated by a user when he desires to allow the conditioned air to hit himself directly, and control means for controlling the frequency changing means and the flowing direction changing means, wherein when the switch is actuated during room cooling operation, the control means outputs to the flowing direction changing means a signal for directing the conditioned air from the outlet port in a downward flowing direction.

Air conditioning device

An air conditioner capable of performing air conditioning in a room regardless of installation condition of an indoor unit thereof and the air blow condition, that is, a blow power of a heated or cooled air blow. The air conditioner comprises: means for setting an installation condition of an indoor unit of said air conditioner; means for setting a condition of an air blow produced from said indoor unit; and means for controlling a standard condition in the air blow condition set provisionally by said air blow condition setting means after taking the installation condition set by said installation condition setting means into account to obtain uniform room temperature distribution.

Air conditioner

An air flow control device for an air conditioner increases the revolution of a fan motor to the revolution wherein the short cycle does not occur, or change the direction of an air directing plate to a preset angle wherein the short cycle does not occur when information corresponding to the short cycle is detected based on the air flowing direction from the outlet port or an intake air temperature. As a result, the short cycle can be prevented, and effective heat exchanger and effective air conditioning wherein temperature distribution in a room to be air-conditioned is not deteriotated are obtained.

In the air conditioning control apparatus of the present invention, the frequency determining means determines not only an operation frequency for the compressor depending on the load determined based on the detected room temperature and the set room temperature, but also an upper limit for the compressor operation frequency based on the air flow rate of the outlet air from the upper and lower outlet ports of the indoor unit and the successive operation time of the compressor. As a result, even if the compressor carriers out cooling operation under too great of a load, the temperature of the air blown off from the upper outlet port of the indoor unit is prevented from dropping down to less than a certain value, thereby eliminating economically the problem wherein dew is produced on the outer surface of the ceiling plate and so on.

Air conditioner control apparatus

An air flow control device for an air conditioner includes a compressor, an outdoor side heat exchanger, expansion means and a room side heat exchanger in sequence, wherein the improvement comprises a room side unit with a upper and lower outlet ports, having the room side heat exchanger therein, upper and lower air-blowing fans disposed in the room side unit so as to face the upper and lower outlet ports, respectively, controller for controlling the operations of the air-blowing fans, a covering member positioned at least one of the outlet ports so as to open and close the corresponding outlet port, and a driving device for controlling the opening and closing operations of the covering member.

Air flow control device

A plate-fin-tube type heat exchanger is constructed with a multitude of plate fins juxtaposed one another and a plurality of heat transmitting tubes passing through said plate fins and being held thereby. A plurality of cut and raised pieces are formed to intersect orthogonally with the air flowing direction at both front and rear surfaces of said plate fins with a certain space interval among them in the air flowing direction and at a location between the adjacent heat transmitting tubes arranged in the longitudinal direction of said plate fins, and then the edge portion on both sides of each cut and raised piece is re-bent in the direction opposite to the lifting direction of said piece and in substantially parallel with the surface of said plate fin so that the cross-section of said cut and raised piece may assume a sloping form in the direction of the air flow and that fin base plate portion may be present between the adjacent cut and raised pieces in parallel with the air flow.

Growing community of inventors

Shizuoka, Japan

Tetsuji Okada