Abstract: A control apparatus for controlling motors of an air conditioner comprises a converter circuit having switching circuitry for converting AC power to DC power and setting an input voltage of an input alternating current waveform to a sine wave of the same phase as that of an input voltage, first and second brushless motors for driving a compressor and a blower, first and second inverter circuits for converting the converted DC power to AC power and supplying AC power to the first and second brushless motors, and a microcomputer for controlling the compressor and the blower of the air conditioner. The microcomputer is constructed in such a manner that input and output operations which are necessary to control the air conditioner are executed for input and output circuits, thereby controlling at least the compressor and the blower of the air conditioner.

Abstract: An air conditioner of the invention is formed of a main body in a box form with a partition panel for dividing indoor and outdoor heat converter rooms, a base holder situated in the main body under the opening, a damper supported on the base holder for covering an opening of the partition panel to be movable relative to the opening of the partition panel, a control part movably disposed on the base holder, and an elongated connection member for connecting the control part and the damper to move the damper by operating the control part. The connection member is made of a synthetic resin and includes at both ends connecting devices integrally formed therewith to be connected to the control part and the damper. Also, a holding device is integrally formed with the base holder. The holding device guides the connection member and includes a holding part with a substantially C-shaped cross section for holding the connection member therein.

Abstract: When one performs an interpart short-circuit test where short-circuit is made between the terminals of the parts mounted on the printed circuit board 1 to find out the existence of fuming, firing and red heating, a spacing test that verifies if the distance between the patterns of the printed circuit board meets the prescribed insulating clearance, and an interpattern short-circuit test that verifies the existence of fuming and firing by shorting between the patterns that do not satisfy the prescribed insulating distance, an automatic tester receives the printed circuit board 1 to carry on the safety test, a control unit outputs the signal that controls said automatic tester and inputs the data of the test results, a detecting means detects the respective test results of fuming, firing and red heating, the memory incorporated into the control unit stores the data, and a recording means records the test results.

Abstract: A control apparatus for controlling a motor of an air conditioner includes a converter, having switching for improving an input power factor, for converting an AC power to a DC power and an inverter for converting the DC power supplied from the converter to the AC power and supplying to a compressor. The output DC voltage of the converter is detected by a DC voltage detecting circuit. An input alternating current is detected by a current detecting circuit. A microcomputer for controlling the inverter calculates a current command from data stored on the basis of the detected voltage. The detected current is compared with the current command, an ON percentage of a PWM signal to control the switching is obtained, and the PWM signal is generated.

Abstract: A louver decreasing the total number of required louvers, reducing the manufacturing cost, and obtaining the excellent external appearance. A louver 20 of a device for shifting the wind direction 11 provided at a blast port 83 of a air-conditioner 10 having a first wind rectification surface 21 which is in a plane form, parallel to the blast direction, and a second wind rectification surface 22 which is in the plane form, positioned in a parallel state to the first wind rectification surface 21, and connected in a stair form by a difference of elevation surface 23, and is positioned so that the difference of elevation surface 23 faces the blast source at a slant.

Abstract: A compact indoor air conditioner may be produced by mounting a fan unit within the installation space of a heat exchanger inside the housing of the air conditioner. An air conditioner having such structure comprises a housing comprising a frame body, a front cover attached to the front of the frame body and having air inlets in the upper surface and in the front and an air outlet in the front lower part, a suction grille that is attached detachably to the front cover and which can be opened or closed, a heat exchanger disposed in the housing and having two cut-out portions defining an upright section, a rearward inclined section and a forward inclined section, wherein the rearward inclined section and the forward inclined section comprise the upper part of the heat exchanger and have an inverted V-shape, and a fan disposed rearward of the upright section and rearward inclined section of the heat exchanger.

Abstract: An air conditioner includes a housing to be mounted on a wall surface in the interior of a room, an air inlet provided at an upper part of the housing, an air outlet provided at a lower part of the housing, an air passage provided in said housing so as to connect the air inlet and said air outlet to each other, a heat exchanging means and an air blowing device disposed in said air passage, and a wind direction plate provided inside an opening of the air outlet in order to change the direction of blowing of thermoregulated air out of the air outlet. An air quantity adjusting plate is provided at an end of the opening of said air outlet in order to change the area of the opening of the air outlet, whereby a sufficient air quantity is obtained regardless of the direction of ventilation of thermoregulated air to thereby perform room air-conditioning efficiently.

Abstract: A color display unit which comprises a plasma display panel and a driving device for driving the plasma display panel so that a picture constituted by input R, G and B signals is displayed on the plasma display panel, wherein the color display unit further comprises a device for analog-to-digital converting the input R, G and B signals and for giving gamma correction to the analog-to-digital converted R, G and B signals, so that the driving device drives the plasma display panel on the basis of the gamma-corrected R, G and B signals, the gamma correction having a characteristic in which a gamma value is made larger than 2.2 in a middle portion of a gamma characteristic curve, and, at the same time, the middle portion of the gamma characteristic curve is shifted to a position having a higher luminance level, and white and black foot portions of the gamma characteristic curve are made smooth.

Abstract: In a control apparatus of an air-conditioner in which a temperature difference between the room temperature and the set temperature is set into an input 1, a time-dependent change in the room temperature is set to an input 2, fuzzy arithmetic operations are executed in accordance with control rules by using membership functions of a membership function section 1, a switching amount of an operating frequency of a compressor 2 of an output is controlled on the basis of the results of the fuzzy arithmetic operations, and the operating frequency is switched at every predetermined interval (t seconds) thereby executing a room temperature control, during the operation, a room temperature (Tr) is always detected by a room temperature detecting section 4 and a change amount (Tr2-Tr1) of the room temperature is calculated in a room temperature change amount calculating section 5 each time of the detection, and when the calculated change amount exceeds a predetermined value, it is determined that the room temperature s

Abstract: In a power module having at least one power device chip and circuits for driving and controlling the power device chip which are incorporated within one and the same package, a heat spreader which is constituted by a material having a heat dissipation property and supports the power device chip on its upper surface is inserted into an opening formed in a control substrate having an upper surface on which patterns for forming the chip driving and controlling circuits and a connection pattern for connection with the power device chip are printed, and the control substrate and the heat spreader inserted into the opening are fixedly supported on a base substrate. Thus, the power device chip and the control substrate can be disposed in plane and reduced in size.