Mitsubishi Denki Kabushiki Kaisha

Katsuyuki Aoki

Hidenori Ishioka

Hiroyuki Umemura

Tetsuji Okada

Seiji Kubo

Toshihiro Tanaka

Kazuaki Isono

Hideaki Nagatomo

Yasuo Imaki

Sakuo Sugawara

Masanori Hara

Kenji Togashi

Tomofumi Tezuka

Isao Funayama

Takayuki Yoshida

Kiyoshi Sakuma

Yoshiaki Tanimura

Katsuhisa Ootsuta

Ken Morinushi

Makoto Yamada

Makoto Yoshihashi

Tomohumi Tezuka

Motoo Sano

Masao Hujii

Isao Arai

An air conditioner includes bent portions provided at edge portions of a plurality of fins juxtaposed on a heat exchanger, respectively. Each bent portion is located at an edge portion which is near a cross flow fan and on the sides of said fin facing the cross flow fan and lying generally between the cross flow fan and a coolant pipe of the heat exchanger. The bent portions are formed by bending the edge portions so as to be in parallel to the coolant pipe and staggered along an axis parallel to the coolant pipe. Thereby, the noise during the operation of the cross flow of the air conditioner can be reduced.

Air conditioner

An operation controller for an air conditioner designed to decrease a difference between an ambient temperature and a set temperature by varying the number of revolutions of a compressor, includes: a means for calculating an operation ratio of the compressor; and a means for determining the range of varying an operation frequency of the compressor in accordance with the operation ratio.

Operation controller for air conditioner

An air conditioning system comprising: a refrigeration cycle including a compressor, a reversing valve, a condenser, a pressure reducing device and an evaporator; a thermal storage heat exchanger which is arranged at a lower portion in a thermal storage tank with a thermal storage material filled therein, and whose refrigerant inlet side is smaller than its refrigerant outlet side in terms of heat exchange capability; and a thermal absorption heat exchanger which is arranged at an upper portion in the thermal storage tank in a way to be reverse to the flow direction of a refrigerant in the thermal storage heat exchanger.

Air conditioning system

There are provided a plurality of groups 14 and 34 which are arranged in an outlet of a main body, and which comprise blowing direction deflecting plates 1, 2 and 3, and 21, 22 and 23; rotational angle setting means 41a and 41b which are provided for the respective groups 14 and 34, and which set rotation angles of the groups 14 and 34; rotational angle limit detection means 42a and 42b for comparing preset limiting rotation angles of the groups 14 and 34 to the set rotation angles; and rotational direction reversing means 43 for reversing the rotational directions of the groups 14 and 34 when at least one of the groups 14 and 34 has reached the limiting rotation angle. Blowing direction of conditioned air can be adjusted while constantly keeping an arbitrary phase difference in blowing direction between the groups.

Blowing direction control device for an air conditioner

An air conditioning system comprising a refrigerant circuit. A thermal storage device is arranged in the refrigerant circuit and can store heat and utilize the stored heat to increase heating capacity at the time of kickoff of heating. A temperature detector detects a temperature at a thermal storage portion of a thermal storage and radiating heat exchanger which is housed in the thermal storage device. A counter counts a thermal storage operation period required for the temperature detected at the thermal storage portion to achieve a predetermined value, outputs a signal indicative of stopping a thermal storage operation when the detected temperature has achieved the predetermined value, counts the lapse of a predetermined thermal storage operation stoppage period after stop of the thermal storage operation, and outputs a signal indicative of starting the thermal storage operation when a predetermined thermal storage operation stoppage time has passed. A controller controls comparing the counted thermal storage operation period with a present value, and determines the next thermal storage operation stoppage period, depending on the length of the counted thermal storage operation period.

Air conditioning system with thermal storage cycle control

A fin-and-tube heat exchanger comprises a fin plate, a heat exchanger tube having portions extending through the fin plate, a plurality of fin collars formed in the plate, wherein louvers are provided so as to surround the tube portions except areas nearest to the collars, the louvers are in parallel with one another and project from alternately both surfaces of the plate, the louver which is located at the trailing edge side and at a position near to a central line of the tube bank is longitudinally extended so as to be along the collars and has opposite rising ends extending from the plate slanted toward the corresponding tube portions at an angle of 35 deg or below to the flow direction of the fluid, and the louver which is located at a position nearer to the trailing edge is also longitudinally extended and has opposite rising ends extending from the plate slanted toward the corresponding tube portions at an angle of 35 deg or above to the flow direction of the fluid so that the angle between the rising ends slanted at an angle of 35 deg or above and the rising ends slanted at an angle of 35 or below is 35 deg or below.

Heat exchanger

An air conditioning apparatus comprises a plurality of outlet ports, a blowing fan for blowing off an conditioned air from the outlet ports to the outside of the main body of the apparatus, an air directing plate arranged in at least one of the outlet ports to enable the direction of the conditioned air to change, an operation state detecting device for detecting the operation state of the main body, and a driving device for adjusting the position of the air directing plate, depending on signals from the operation state detecting device.

Air conditioning apparatus

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.

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.

The air conditioner comprises a manual or automatic sensible temperature detection decision means consisting of a temperature detector for detecting room temperature, a hot/cold selector switch, a radiant heat detector, an air current detector and an outdoor temperature detector, an analog/digital signal converter, a microcomputer, a compressor and a blower, which is characterized in that temperature can be set to a thermal sense of a user, room temperature is automatically regulated step by step to coincide with the set temperature, or a sensible temperature is set automatically by the temperature detection and setting function and thus kept constant at all times.

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.

Growing community of inventors

Shizuoka, Japan

Katsuyuki Aoki