JPS608584Y2 - Air conditioner malfunction prevention device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a device for preventing malfunction caused by misuse in an air conditioner, and one of its purposes is to prevent malfunction due to mischief or the like and permanent installation.

Conventionally, the speed change means of this type of indoor blower in an air conditioner is configured to operate at the OFF point of the thermostat that controls the room temperature.

This configuration will be briefly explained with reference to FIGS. 4 and 5.

First of all, to explain the case where the speed of the indoor fan 101 is not changed, the automatic speed change switch 103 is set to "off".
In this case, the thermostat 102
The compressor 108 operates and stops depending on whether the
5 is OFF.

Therefore, the indoor blower 101 has the air volume selector switch 1
It is decided in the state of 07.

Next, a case where automatic speed change of the indoor blower 101 is performed will be described.

Note that the compressor 108 performs the same operation as in the case where the speed change is not applied.

In this case, the automatic shift switch 103 is in the "on" state, and the relay 105 is operated by the operation of the relay 103, that is, by the ON/OFF of the thermostat 102, and at the same time, the self-holding is applied by the contact 105a of the relay 105. Therefore, the indoor blower 101 maintains the weak air position regardless of the air volume changeover switch 107.

FIG. 5 briefly explains the operation of this electric circuit.

In this electric circuit configuration, the automatic speed change switch 103
When set to ``On'', the room temperature is high (thermostat 10
2), the compressor 10B is operated with a strong wind with a large cooling capacity until the OFF point of the thermostat 102 is reached, and when the set temperature (OFF point) is reached, the compressor 10B is stopped and the compressor 10B is operated with a weak wind with a small capacity. Automatic switching also reduces noise, which is very beneficial.

However, if the setting of the thermostat 102 changes and passes the OFF point due to misuse or mischief by a child, the compressor 108 will stop when it is not necessary, and the indoor blower 101 will switch to low-air operation. There was a drawback that it could be replaced.

In the figure, 104 and 104a are the relays and contacts that release the self-holding of the relay 105, and 106 and 106a are the fan 1.
01 speed change relay and contacts.

The present invention takes into account the drawbacks of the conventional air conditioners mentioned above and provides a better air conditioner.

Hereinafter, the present invention will be described with reference to FIGS. 1 to 3 of the accompanying drawings showing one embodiment thereof.

In the figure, 1 is an indoor fan with at least two or more variable speeds, 2 is a thermostat, and 3 is an automatic speed change switch, which allows automatic speed change when turned on. In this embodiment,
It will be canceled when the wind becomes weak and it is "cut".

4.5 is an electromagnetic switch (
(hereinafter referred to as relay).

6 is the air volume selector switch; when turned on, the wind is strong, and when it is turned off, the wind is weak.

7 is the compressor, 8 is the contact point 8 after the timer set time in seconds
This is a timer that turns on the timer a, and if the timer power is turned off before the timer set time in seconds has elapsed, it is reset and returns to zero.

Note that the operation of this timer 8 is shown in FIG.

The operation of the electric circuit as described above will be briefly explained.

First, when the automatic speed change switch 3 is in the "off" state, when the thermostat 2 is turned on, the relay 4 is operated, the contact point 4a of the relay 4 is turned on, and the compressor 7 is operated.

At this time, since the timer 8 is OFF, the indoor blower 1 operates with strong wind as set by the air volume changeover switch.

(In Fig. 1, strong wind operation is set.) Next, when the thermostat 2 is turned off, the relay 4 is turned off, so the compressor 7 is stopped and the timer 8 is activated at the same time, and after the timer set time has elapsed, the timer contact 8a is turned off. Turn on.

At this time, since the automatic speed change switch 3 of the indoor blower 1 is set to "off", the relay 5 remains OFF, and the air flow rate set by the air volume changeover switch 6 remains in the strong wind operation.

Next, a case where the automatic shift switch 3 is "on" will be described.

When the thermostat 2 is ON, the timer is inactive and the compressor 7 is operated.

At this time, the timer contact 8a of the indoor blower 1 is OFF.
, the air volume setting of the air volume selector switch 6 results in strong wind operation.

After further time passes from this state, thermostat 2
When is 0FFL, the compressor 7 is stopped because the relay 4 is turned off, and the timer 8 is activated, and after the timer set time has elapsed, the timer contact 8a is turned ON.

Since the relay 5 is turned on, the indoor blower 1 performs a weak wind operation.

Thereafter, as time passes, if the thermostat 2 is turned on, the compressor 7 restarts its operation, and the indoor blower 1 remains in low-air operation because the relay 5 is self-holding.

If you want to stop the weak wind operation and switch to strong wind operation, just turn the automatic speed change switch 3 to "off".

According to the configuration of the electric circuit as described above, room temperature change characteristics as shown in FIG. 2 can be obtained.

Note that in this circuit, an example is given using an electric circuit in order to make the explanation easy to understand, but of course the same operation is possible with an electronic circuit.

Originally, the purpose of automatic speed change operation is to operate at maximum cooling capacity when the load is high, and to operate more quietly with weaker cooling capacity when the load reaches low load.

Therefore, according to the present invention, not only does the purpose of the automatic speed change operation described above be achieved, but even if the thermostat 2 is activated due to misuse or a child's mischief, and reaches the OFF state, the timer set time can be maintained in seconds. Since the delay device does not output any output, the indoor blower 1 does not automatically change gears and maintains its previous operating state.

Therefore, even if an erroneous operation occurs, the thermostat will reach its set point (ON point) within seconds of this timer set time.
You don't have to release the automatic gear shift switch each time, as you only have to return it to the original position.

Furthermore, if the air conditioning load is high and the thermostat OFF time is short, the delay device will not output, so the air conditioner will operate at high capacity and the load will become low and the thermostat will turn OFF.
When the time becomes longer than the set time t, the speed of the indoor blower is changed to a weak wind and a low capacity operation is performed.

Therefore, it is possible to prevent erroneous operation and to perform optimal operation according to the air conditioning load, thereby making it possible to obtain an ideal air conditioner from the viewpoint of room temperature stability and the life of the indoor blower.

[Brief explanation of the drawing]

Fig. 1 is an electrical circuit diagram of an air conditioner equipped with a malfunction prevention device according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing the air conditioning state of the air conditioner, and Fig. 3 is an electric circuit diagram of an air conditioner equipped with a malfunction prevention device according to an embodiment of the present invention. FIG. 4 is an electric circuit diagram of a conventional air conditioner, and FIG. 5 is an explanatory diagram showing the air conditioning state of the air conditioner. 1... Indoor blower, 2... Thermostat, 8... Timer (delay device).

Claims (1)

[Scope of utility model registration request] A delay device that has an indoor blower equipped with at least two or more speed change means and a thermostat that controls the operation of an air conditioner, and that changes the speed of the indoor blower when the OFF time of the thermostat is longer than a set value. A malfunction prevention device for air conditioners equipped with