JPS6049817B2 - Air conditioner control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for an air conditioner, and more particularly to a control device for an air conditioner, such as a so-called multi-air conditioner, which includes one outdoor unit and a plurality of indoor units.

An object of the present invention is to provide a setting means for setting standards for the air conditioning conditions of air-conditioned spaces separately in an indoor unit and another location, such as a central control panel, thereby allowing the standards for multiple air-conditioned spaces to be centrally set in one place. It is an object of the present invention to provide a control device capable of controlling each indoor unit as well as controlling each indoor unit.

For example, an air conditioner consisting of one outdoor unit and multiple indoor units is shown in Figure 1. An outdoor unit 1 equipped with a heat exchanger IH, solenoid valves 12 and 13 as refrigerant circulation amount control means corresponding to indoor units 2 and 3 (described later), and a fan motor (not shown), and capillary tubes 2Q and 3.
Spaces A and B are air-conditioned by an air conditioner consisting of indoor units 2 and 3 each equipped with heat exchangers 2H and 3H, and a fan motor (not shown).

For this type of air conditioner, usually indoor units 2 and 3
A thermostat is provided inside the space, and a control device is provided that turns on and off the compressor 11 and electromagnetic valves 12 and 13 according to the room temperature of each space A and B. Therefore, since the set temperature (off temperature) setting means for each thermostat is attached to each thermostat and provided in the indoor unit, the set temperature cannot be changed elsewhere. For this reason, if a person living in space A or B is not familiar with thermostats, there is a possibility that the set temperature can be changed without limit, creating an air conditioning condition that is too cold or too hot. There is. In such cases, it is clear that falling asleep in such a space would have a negative effect on the body, and this must be avoided in some way. The present invention aims to eliminate the disadvantages seen in the above-mentioned conventional examples. The present invention will be explained with reference to FIG. 2, which is one embodiment thereof.

2C is a control circuit provided in the indoor unit 2 and constitutes a part of the control device according to the present invention.

2CT is a room temperature detection thermistor as a means for detecting the air conditioning state of the space A, and forms one side of the resistance bridge.

Series circuit of resistors 2C3, 2C4, 2C5 and switch 2C
Reference numeral 6 constitutes a first setting means, which is connected in series with a volume 4A3 which becomes a second setting means to be described later, and forms the other side of the resistance bridge mentioned above, and sets the cooling off temperature which is a reference for the air conditioning state. Determine the distance. The other two sides of the resistor bridge are resistors 2C
1,2C2 is formed. That is, thermistor 2
CT, the outputs of the first setting means and the second setting means all appear as outputs of this resistor bridge and are input to the control means described below. The comparator 2C8 outputs a "Hi" or I'LOll signal depending on the bridge output, that is, the off-temperature T determined by the first and second setting means.
If the room temperature RTA is higher than FF, comparator 2C8
The output becomes JHl,l. Resistor 2C7 is on temperature TON
There are some that set the temperature higher than the off-temperature to create a differential. The output of the comparator 2C8 is input to an outdoor control circuit 1C forming a part of a control device provided in the outdoor unit 1, which turns on and off the relay 15 and turns on and off the solenoid valve 12. That is, if RTA>TOFF, the output of the comparator 2C8 becomes 1゛HlOl, turning on the relay 15 and turning on the solenoid valve 12. At the same time comparator 2
The output of C8 is "0R" which turns on the relay 14 through the gate 17, turns on the compressor 11, and performs cooling operation for the space A. As a result of this cooling operation, when RTA<TO group is reached, the output of comparator 2C8 becomes ``LOOl'', the relay 15 is turned off, the solenoid valve 12 is turned off, and the cooling operation for at least space A is stopped.
When TA rises and RTA>TON, the output of comparator 2C8 becomes "H1" again. Then, cooling operation for space A starts. Indoor unit 3 has indoor unit 2
A control circuit 3C that is the same as the control circuit 2C is provided, and by the same operation as described above, the relay 16 of the outdoor control circuit 1C is turned on and off, and the solenoid valve 13 is turned on and off.
From this, the cooling operation for space B is turned on and off. The gate 17 turns on the relay 14 and turns on the compressor 11 when an on signal (that is, a "Hi" signal) for the solenoid valves 12 and 13 is input from one or both of the indoor unit control circuits 2C and 3C. It is for the purpose of Reference numeral 4 denotes a control circuit provided at a separate location from the indoor units 2, 3 and the outdoor unit 1, and a variable resistor 4A3 serving as a second setting means corresponding to the first setting means of the indoor unit 2, A variable resistor 4B3 is provided as a second setting means for the first setting means.

Here, the relationship between the positions of the switch 2C6 and the variable resistor 4A3 and the off-temperature will be explained in more detail. variable resistance 4A
)3 is RVA, the resistance value Rs of the series connection becomes as follows depending on the positions L, M, and H of the switch 2C6. However, R3, R4, R5 are resistors 2C3, 2C4
, 2C5 resistance values. The balance condition of the resistance bridge is as follows when the output of the converter dummy C8 is "Hi".

RTA: Resistance value of thermistor 2CT Rl,2,7: Resistance value of resistors 2C1, 2C2, 2C7 From equation (4), when R is large, RT, that is, when R and A are small, Rs
When RTA is small, the bridge is balanced when RTA is large.

That is, compared to when the switch 2C6 is in the M position, when the switch 2C6 is in the H position, the off-temperature given as the temperature at which the bridge is balanced becomes higher (because RTA becomes smaller).
Also, at the L position, the off-temperature is low (because RTA is large). Furthermore, by changing the position of the variable resistor 4A3, RVA changes and Rs changes, so the off-temperature changes. This situation is shown in FIG. As RVA increases, R increases, so the off-temperature increases. Also, the off-temperature is higher when the switch 2C6 is in the H position than in the M position.
L has a lower off-temperature. According to the present invention, since the setting means is disposed in a distributed manner, it is possible to prevent unrestricted operation of the setting means that would otherwise occur if the setting means were concentrated at one point of force. This prevents harmful effects on the body, and by centralizing one of the distributed setting means, the air conditioning conditions of a plurality of spaces can be set independently.

Such effects are not limited to the embodiments disclosed in the present invention, and it is possible to make various modifications or obtain other embodiments without departing from the scope and gist of the present invention.
It's possible.

That is, for example, increasing the number of contacts of switch 2C6,
Alternatively, a digital control circuit may be used for the indoor unit and outdoor unit, or the thermistor output may be digitized through an A/D converter, or variable resistors 4A3 and 4B may be used to transmit signals between units using digital signals.
3 with a switch, or increase the number of indoor units to 3.
Modifications to increase the number of units or more are within the scope of the present invention. Further, in the disclosed embodiment, the setting means of each indoor unit operates for fine adjustment, and the variable resistor of control circuit 4 operates for main tone, but it is within the scope of the present invention to reverse this relationship.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an air conditioner, FIG. 2 is a circuit diagram of a control device for the air conditioner according to an embodiment of the present invention, and FIG. 3 is an explanatory diagram of the operation of the control device. 1...Outdoor unit, 2,3...Indoor unit, 1C, 2C, 3C...Control circuit as control means, 2CT...Thermistor (air conditioning status ), 2C6...switch for the first setting means, 4A3, 4B3... variable resistor for the second setting means.

Claims (1)

[Claims] 1. Means for detecting the air conditioning state of a space having one outdoor unit and a plurality of indoor units, which is air conditioned by each indoor unit, and first and second means for providing a reference for the air conditioning state of the space. It consists of a setting means, and a control means for controlling the operation of the outdoor unit and the indoor unit according to the outputs of the detection means and the first and second setting means, and the first setting means is configured to control the operation of each indoor unit. A control device for an air conditioner, comprising: a second setting means installed in a location other than an indoor unit or an outdoor unit.