Hitachi, Ltd.

Hiroo Nakamura

Masayuki Nonaka

Hidenori Yokoyama

Yasuo Notohara

Akira Nishiguchi

Yukio Kawabata

Hiroshi Iwata

Hiroaki Matsushima

Sunao Funakoshi

Daisuke Hisajima

Yuhachi Takakura

Makoto Ishii

Kazuya Matsuo

Takatoshi Yamamoto

Yukio Obata

Toru Inoue

Katsuhiko Hashimoto

Akio Sakazume

Hiroshi Shinozaki

Susumu Kashiwazaki

Kouji Katou

Tomomi Umeda

Hitoshi Ogasahara

Tsutomu Kurokawa

Atsushi Ohtsuka

Shoji Takaku

Motoo Morimoto

Hiroyuki Ogawa

Saneaki Nakao

An air conditioner and a control software updating system capable of easily updating and adding control software desired by a customer. An internet system including telephones and/or personal computers is provided between a service center and customers. Each of air conditioners is provided with a connection terminal for connection to a communication terminal. Software for controlling operation of the air conditioner is updated by using the internet or a memory card after explaining a control software to the customer and confirming the customer's desire.

Air conditioner

An air-conditioning apparatus, being able to download operation control information through a network, wherein a remote controller of the air-conditioner is structured, so that it can indicate the operation information download, and is provided a function of indicating an operation under the operation mode upon the basis of that operation information to the air-conditioner. And also, a function is provided for inhibiting transmission of the information between the network, thereby obtaining an improvement on operability after downloading, as well as, an improvement on operability during the download operation, and also protection from erroneous operation(s) caused due to being connected to the network.

Air-conditioning apparatus

For achieving an air conditioner being applicable to various a-c source voltages in common and operative with high power factor by suppressing generation of high harmonics, an a-c source voltage from an a-c electric power source 1 is rectified in full-wave by a rectifier 2, and a d-c source voltage Ed of an inverter 13 is obtained by being charged in a condenser 5. Here, there are a-c source voltages of 100 V and 200 V, and a divided voltage Ed1 of the d-c voltage of the condenser 5 is selected when the a-c source voltage is 100 V, a divided voltage Ed2 (here, Ed1&gt;Ed1) of the d-c voltage of the condenser 5 is selected when the a-c source voltage is 200 V, respectively by an exchange switch 18, and is used as a d-c voltage Ed' for controlling on and off of a switch element 6. Though the d-c source voltage Ed differs depending on the a-c source voltage of 100 V or 200 V, it is possible to set the d-c source voltage Ed at a voltage value for operating the inverter 13 with low loss and high efficiency, for each one of the a-c source voltages, by setting a ratio of the voltage division appropriately.

The present invention relates to air conditioning systems and more particularly to an air conditioning system which provides air conditioning in each of a plurality of spaces. The air conditioning system according to the present invention divides a space with partitions into a plurality of air conditioning spaces and controls the temperature by cooling and heating mediums supplied from an external heat source using a three-way valve and an expansion valve. The air conditioning system includes an ID card for identifying a person which uses the air conditioning system. If a person is present to use the air conditioning system, the set or measured values of the environmental conditions for that person is stored. When that person again uses the air conditioning system, the system calculates the environmental conditions stored by the person in accordance with his stored set or measured environmental condition values. Each of the individuals' preferred comfortable environments is automatically realized by calculating the set values for that person in accordance with his current or past set conditions independent of the space. Changes to his preference to the environmental conditions are easily made.

Air conditioning system

A clothes dryer equipped with a condensation unit (23, 38, 73) in which the cooling water that is fed is brought into direct contact with the humid air to dehumidify the humid air. The condensation unit (23, 38, 73) of the clothes dryer comprises a first duct (24, 39, 75) connected at its one end to the delivery portion of the circulating fan (20) and arranged with its other end being directed downwardly of the dryer housing; a second duct (25, 40, 76) connected at its one end to the other end of the first duct (24, 39, 75) and connected at its other end to the heater duct (8d); a cooling water pouring port for feeding cooling water to the second duct; cooling means for bringing the cooling water into direct contact with the humid air; and a water drain port for draining from the second duct (25, 40, 76) the water condensed from the humid air and the cooling water.

Clothes dryer

A room air conditioner in which the interior of a cabinet is divided into an indoor portion and an outdoor portion by a partition plate having a non-vertical section, and a fan motor is supported in the outdoor portion in such a manner that its rotary shaft is disposed perpendicular to the bottom of the cabinet and penetrates the partition plate at one end thereof to extend into the indoor portion. A first centrifugal fan is mounted at one end of the rotary shaft of the fan motor while a second Silocco fan is mounted at the other end thereof disposed in the outdoor portion. An indoor heat exchanger is disposed in spaced juxtaposed relation to a suction opening formed in the front of the indoor portion so that the air inside a room is drawn by suction through the indoor suction opening and caused to pass through the indoor heat exchanger by means of the first Silocco fan which exhausts air into the room through an indoor exhaust port, and an outdoor heat exchanger is disposed in spaced juxtaposed relation to a suction opening formed in the rear of the outdoor portion so that the air outside the room is drawn by suction through the outdoor suction opening and caused to pass through the outdoor heat exchanger by means of the second centrifugal fan which exhausts air outside the room through an outdour exhaust port. The room air conditioner has a greatly reduced thickness as compared with the same type of air conditioners of the prior art.

Room air conditioner

Growing community of inventors

Tsuchiura, Japan

Hiroo Nakamura