JPS589908B2 - air conditioner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air conditioner (hereinafter referred to as an air conditioner),
In particular, it relates to improvements in the control device.

Air conditioner control devices that use electronic controllers such as microcomputers have made it possible to add new control functions that were not previously available.

However, the internal control circuitry is also complex, and it takes time to repair, especially in the event of a breakdown, and even a simple breakdown in a component cannot be repaired by anyone other than an expert, which means that the air conditioner's heating and cooling functions are stopped for long periods of time, resulting in It was also an inconvenience for some people.

The present invention has been made to eliminate the above-mentioned drawbacks.
To provide an air conditioner in which a manual operation part is provided with a manual switch capable of operating a load device regardless of an output signal of an electronic control part, and only the heating and cooling function can be temporarily satisfied even if the electronic control part breaks down.

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an overall configuration diagram showing an air conditioner control device equipped with an abnormality switch according to the present invention. In the figure, 1 is a manual operation unit such as a remote control box, and 2 is a microcontroller. 3 is a detection element such as a thermometer, 4 is a switching circuit such as a relay or solid state element, 5 is a motor such as a compressor or fan, 6 is a power source for the motor, and 7 is a manual switch.

In FIG. 1, for convenience of explanation, the switching circuit 4 is
Although a relay is used, it is also possible to use a solid-state element instead, and an element that changes the current value depending on the type of motor 5 may be used.

First, a signal from a manual operation section 1 such as a remote control and a signal from the detection element 3 are input to the electronic control section 2 .

The electronic control unit 2 performs various calculations based on these signals, provides the signals to the switching circuit 4, activates the relay inside the switching circuit 4, closes the contacts, and operates the compressor or the motor such as the fan. do.

The manual switch 7 of the present invention has one end connected to a 10B power source that supplies power to the manual operation section and the electronic control section, and the other end connected to the output terminal ζ of the electronic control section 2.

Normally, the air conditioner operates with the manual switch 7 open and controlled by other switches in the manual operation section, but in the event of a failure due to a break in the circuit of the electronic control section, ie, a break in the integrated circuit or transistor, the relay coil of the switching circuit 4 is activated. Since no current flows through the motor 7, the electric motor 7 becomes unable to operate.

In this state, if you close the manual switch 7, 10B
The current supplied from the power source can be supplied to the switching circuit 4 without passing through the electronic control unit 2, and the contacts of the relay can be closed to temporarily operate the air conditioner.

Figure 2 shows an example of installing an abnormality switch. A shows the front side of the remote control box, B shows the back side of the remote control box, and the power switch, air volume selector switch, variable resistor for setting room temperature, etc. are operated. The members are installed on the front surface of the housing, and the manual switch is installed on the back side because it is not normally used.

Figure 3 shows another example of the connection method for a manual switch.The manual switch in Figure 1 had a switch contact configuration (only 1a contact) that could only respond to failures where the relay could not be energized. However, in FIG. 3, the contacts are set as 1a-b and one additional connection wire is used to cope with failures such as short circuits or disconnections of the integrated circuit or transistor in the electronic control section.

Thereby, the load device can be operated regardless of the output signal of the electronic control section 2.

As is clear from the above explanation, according to the present invention, even if the electronic control unit breaks down, it is possible to temporarily satisfy the cooling and heating functions of the air conditioner. It can also serve as a winter trial run switch.

Further, by providing the manual switch on the back side of the remote control box, an excellent effect can be obtained in that the rate of erroneous operation is extremely low.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram showing a control device for an air conditioner equipped with an abnormality switch according to the present invention, Fig. 2 is an example of a manual switch installed in a remote control box, and Fig. 3 is a contact configuration of the manual switch. It is a figure which showed the other Example which changed. 1... Manual operation section, 2... Electronic control section, 3... Detection element, 4... Switching circuit, 5... Electric motor , 6... Power supply for electric motor, 7... Manual switch.

Claims (1)

[Claims] 1. A manual operating section with operating members such as a power supply cut-off switch, an air volume selector switch, and a variable resistor for setting room temperature on the surface of the casing, a detection element for detecting room temperature, and a detection element for detecting the room temperature; The electronic control unit generates a control signal by applying a signal, and the switching circuit controls the power supply current to the load device using the control signal of the electronic control unit, and the manual operation unit remotely controls the load device. What is claimed is: 1. An air conditioner capable of operating the load device, the air conditioner being characterized in that a manual switch capable of operating the load device regardless of an output signal from the electronic control section is provided on the back side of a casing of the manual operation section.