摘要:
There is disclosed a current control apparatus comprising first controllers adapted for detecting an overall or total load current to calculate distribution values for distributing a current margin with respect to an overall or total current limit value to respective air-conditioners; and second controllers adapted for respectively controlling air-conditioners so as not to exceed individual current limit values, and for carrying out an incremental correction of individual current limit values in accordance with distribution values calculated by the first controllers.
摘要:
A drive control apparatus for controlling the operation of an air conditioner comprises a 24-hour air-conditioning mode, a selector for selecting one of drive and release positions of the 24-hour air-conditioning mode, a load-responsive air-conditioning mode under which the air conditioner is operated in dependence on a load in a space to be air-conditioned, a drive control for effecting one of drive and stop controls of the load-responsive air-conditioning mode, and a preferential output unit for outputting a signal from the drive control in preference to an output signal from the selector. An output from the preferential output unit may be used to drive the operating frequency of the compressor at a predetermined number of revolution, to drive an indoor fan either continuously or intermittently at a predetermined number of revolution, and/or to deflect a vertical deflector blade to a predetermined position.
摘要:
The air conditioning apparatus comprises a heat source apparatus, an air blower, a damper disposed in each of branch duct to regulate warm air or cool air to be supplied to each of rooms, a room thermostat placed in each of the rooms, a heat load measuring means and a damper control means. The heat load measuring means controls the degree of opening of the dampers through the damper control means on the basis of output signals of an established temperature and the current room temperature from the room thermostats. Further, the capacity of the heat source apparatus and the capacity of the air blower are determined in accordance with the value of the heat load, and the pressure and the temperature of the air in the air duct.
摘要:
An air conditioning system for a building including an air conditioner, a thermostat for controlling operation of the air conditioner, and alternating current electrical control means including circuitry for effectively maintaining operation of the air conditioner and wherein said system comprises a relay including a switch normally closed in the absence of adverse presence of water, at least one water sensor functioning as a switch in the presence of water, and a triac including first and second terminals and a gate, said triac preventing flow of current to the relay and permitting flow of current when the gate of the triac receives flow of an electrical current. Flow of current from the first terminal to the second terminal of the triac and then to said relay effectively opens said normally closed switch for automatically interrupting the flow of alternating current to the thermostat and shutdown of the air conditioner for preventing damage to the building upon adverse accumulation of water discharged from the air conditioner.
摘要:
A control system for controlling an air conditioning system having a variable delivery compressor and an evaporator for cooling and dehumidifying air supplied thereto from a blower. The control system comprises sensor means for sensing the evaporator boiling pressure, determining means for determining whether or not the detected value of evaporator boiling pressure has reached either a predetermined upper limit or a predetermined lower limit, and control means for controlling the capacity of the compressor over its maximum variable range and also the quantity of air supplied from the blower so as to maintain the evaporator boiling pressure at one of the predetermined upper and lower limits which is determined to have been reached by the detected boiling pressure value.
摘要:
When an air-conditioning is started, a determination is made as to whether a power relay is run so as to keep a compressor in a power-on state. When the power relay is in the power-on state, the running current of the power relay is detected. At this point, if the current value does not reach to a predetermined value, it is determined that the compressor is stopped in an exterior unit for protection.
摘要:
A microcontroller with external memory interacts with a host computer or terminal via a fully isolated RS232 serial interface. An eight-bit D/A converter transforms signals generated digitally in the microcontroller. The low level analog signal at the D/A output is further amplified in a power amplifier which supplies a signal to the motor terminals of the motor to be programmed via solid state relays. The solid state relays form an array of switches which are selectively closed by a low level digit signal generated by the microcontroller and processed by digital circuits. Four signals may be modulated with a signal representing the line frequency and are used specifically in an emulation mode. The interface receives multi-function feedback signals (RPM) from the motor such as speed, memory, content, and diagnostic information. Comparators provide an integrity check of the connections (cable) and the input section of the motor (optocouplers). The comparators compare voltages and currents of a selected motor signal against pre-defined threshold levels.
摘要:
An operation mode of an air condition is automatically set during an intermediate season so that the set operation mode can match the actual sensation of a user. A plurality of temperature zones are set defining a plurality of room-temperature ranges and a respective plurality of outside-temperature ranges, and operation modes are selectively assigned to each of the temperature zones. An operation mode is set according to the zone containing an actual room temperature and outside temperature. In addition, the temperature zones assignments are selectively changed according to a calendar date of operation.
摘要:
On each refrigerant piping to an indoor heat exchanger of each indoor unit, there is provided a flow control valve of which target opening (.theta.t) is selected separately according to an air-conditioning load of each indoor unit. Provided, the flow control valve which will have a maximum target opening (.theta.t.sub.max) selected, is fully opened, with the remaining flow control valves having such an opening greater than each of respective target openings (.theta.t) by a given value (.DELTA..theta.). Meanwhile, a target frequency (Ft) of output power from an inverter is selected, following the total of air-conditioning loads of respective indoor units; provided, an actual frequency (F) of output power of the inverter is selected in such a value lower than the target frequency (Ft) by a given value (.DELTA.F).
摘要:
An air conditioner is disclosed which includes a unit for setting a defrost mode, as required, when the heating operation mode is determined, a unit for enabling the refrigerant which is delivered from the compressor to flow through one or more indoor units calling for the heating operation mode, when the defrost mode is set, and to be returned back to the compressor through one or more indoor units calling for the cooling operation mode, and a unit for enabling a stream of the refrigerant which is delivered from the compressor to pass through the outdoor heat exchanger, when the defrost mode is set, and to enter the stream of the refrigerant flowing into one or more indoor units calling for the cooling operation mode.