JPS6329143A - Operating mode switching device for air conditioner - Google Patents

Abstract

PURPOSE:To allow a ready switching to cooling, heating or automatic mode by an operating mode switching device comprising a resistance type potential dividing circuit, a compensating means, a determining means, a first and a second selecting means. CONSTITUTION:Under a condition where an operation mode selecting switch 7 is switched to 'automatic' mode, a signal of divided potential determined by the combination of resistors 10, 11, 12, 13 is outputted from a terminal of an air flow rate selecting switch 6. Said signal corresponds to the cooling operation mode selection. However, as afore-said signal of divided potential is fed to a compensating circuit 2, a potential signal outputted from the compensating circuit 2 becomes the potential signal corresponding to the heating operation mode selection. As a determination signal is supplied from a cooling/heating determination circuit 3 to a first selector 4 under this condition, afore-said signal of divided potential is outputted if the condition warrants a cooling mode operation, and the compensated potential signal is outputted if the condition warrants a heating mode operation. Further, since a low level selection control signal is supplied to a second selector 5, either cooling or heating mode operation can automatically be performed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an operating state switching device for an air conditioner, and more specifically, it is capable of switching between cooling operation and heating operation by manual operation. In an air conditioner that can automatically switch between cooling operation and heating operation based on the outside temperature, the type of operating state is instructed to the control unit that performs the sub-part of the actual operating state. The present invention relates to an operating state switching device for supplying signals for switching.

<Prior Art> Air conditioners that are capable of performing not only cooling operation but also heating operation have been conventionally provided.

In such an air conditioner, cooling operation,
There are three levels of ff for each heating operation: sudden, strong and weak.
In order to be able to select 1ffi, as shown in FIG. 2, there is a switch (21) for switching between cooling and heating, and a switch (22) for switching between Jlffi. ing. And the switch (
Connect the switching terminal of switch (21) to ground, and
Connect the heating side terminal of the switch (22) and the switching terminal of the switch (22) with a resistor (
23), and the strong side terminal of the switch (22) and the power supply terminal and the station side terminal and the power supply terminal are connected through resistors f24 and (25), respectively. Furthermore, resistors f26 and (27) are connected between the switching terminal of the switch (22), the power supply terminal, and the ground, respectively,
The divided voltage at the switching terminal of the switch (22) is supplied to a control section (not shown).

Therefore, when a state where the air volume is high during cooling operation is selected, the divided voltage by the resistors (26) and (27) is supplied to the control unit, and a state where the air volume is high during cooling operation is selected. When the voltage is on, the divided voltage by the resistors (24), (26), and (27) is supplied to the control unit, and similarly, six levels of divided voltage are provided corresponding to the switching between cooling and heating, and the switching of the air volume. The voltage is supplied to the control unit, and the control unit can identify which stage the divided voltage is at and perform operation under the set conditions.

<Problems to be Solved by the Invention> The air conditioner with the above configuration does not have a function that automatically switches between cooling and heating based on the outside temperature. When the outside temperature changes significantly, there is an inconvenience in that it is necessary to frequently switch between cooling and heating.

In order to eliminate this inconvenience, it is only necessary to obtain a three-stage divided voltage that instructs switching of the FFL suspension corresponding to automatic operation of air conditioning and heating. , as shown by the rectangular line in Figure 2, the switch (
Add the automatic side terminal to 21) and connect the automatic side terminal and switch (
A resistor (28) may be connected between the switch terminal 22) and the switching terminal 22).

However, when such a configuration is adopted, there are nine steps to divide a constant power supply voltage, which reduces resolution and makes it more susceptible to noise, leading to new problems such as malfunction. It will bring the problem to light.

In other words, air conditioners that use microcomputers to control various operations usually use a power supply voltage of about several volts (most commonly about 5V), so they are divided into nine stages. If the voltage difference at each stage is 5
/9■, and the reduction in resolution and malfunctions caused by noise become particularly noticeable.

<Object of the invention> This invention was made in view of the above problems,
To provide an operating state switching device for an air conditioner that can operate stably against noise without reducing resolution and has a function of switching the onset of cooling and heating.

<Means for Solving the Problems> To achieve the above object, the operating state switching device of the present invention includes a resistance voltage divider circuit, a correction means, a discrimination means, a first selection means, and a first selection means. 2 selection means.

The resistance voltage divider circuit has a switch for changing the air volume and a switch for changing the operation between cooling, heating, and automatic operation, and the partial pressure signal taken out from the switch for switching ff1ffi is the air volume and It is set to 6 levels corresponding to cooling and heating, and the partial pressure signal taken out from the operation switch is set to 2 levels corresponding to whether or not automatic operation is selected.
It is set in stages.

The correction means generates a correction signal for automatic heating operation by inputting the partial pressure signal taken out from the air volume switching switch t of the resistance voltage dividing circuit.

The determination means determines the type of operation based on the set temperature and the measured temperature.

The first selection means selectively outputs the partial pressure signal taken out from the Jilffi switching switch or correction No. 18 based on the discrimination signal from the discrimination means.

The second selection means selects the partial pressure signal taken out from the air volume changeover switch or the output signal from the first selection means based on the partial pressure signal taken out from the operation changeover switch. It outputs the following information.

With the operating state switching device configured as described above, the output from the switching terminal of the air volume switching switch corresponds to the state of the ff1ffi switching switch in the resistance voltage divider circuit and the state of the operation switching switch. It is possible to output any of six levels of divided voltage, and it is also possible to output a signal corresponding to automatic operation, cooling operation, or heating operation from the fixed terminal of the operation switching switch.

Then, the divided voltage output from the switching terminal of the Jitffi switching switch is directly transmitted to the first selection means,
and is supplied to the second selection means, and also supplied to the first selection means after being corrected by the correction means.

Therefore, when the operation switching switch is operated to perform cooling operation or heating operation, the above-mentioned divided voltage is output as is through the second selection means, and the divided voltage is output in a state identified based on the divided voltage. The air conditioner can be turned on to operate the air conditioner.

Conversely, when the operation changeover switch is operated to perform automatic operation, the determination signal output from the determination means (indicating whether cooling operation or heating operation should be performed) is detected. Since the instructing signal is supplied to the first selection means, either the divided voltage or the correction signal corrected by the correction means is output depending on the type of the judgment signal. Since the second selection means is controlled to the opposite state to the above, the output signal from the first selection means is output as is, and the signal is identified based on the operating state of the air volume switching switch and the outside temperature. It is possible to prevent air conditioners from driving under such conditions.

<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 is an electric circuit diagram showing an embodiment of the operating state switching device of the present invention, which includes a resistive voltage divider circuit (1) and a correction circuit (1).
'2J, a cooling/heating determination circuit (3), a first selector (4), and a second selector (5).

The resistance voltage divider circuit (1) has a switch (6) for switching the air volume.
), and an operation switching switch (71).

The switching terminal of the switch (7) is connected to ground, and the heating side terminal of the switch (7) and the switching terminal of the switch (6) are connected via a resistor (8). The side terminal is connected to the power supply terminal via a resistor (9). In addition, the steep side terminal and east side terminal of the switch (6) are connected to the power terminal via the resistor fI)l (11), and the switching terminal of the switch (6) is connected to the power terminal and the ground. Resistors (12) (
13) is connected.

The correction circuit (2) inputs the divided voltage signal at the switching terminal of the switch (6) and corrects it into a voltage signal for heating operation.

The cooling/heating determination circuit (3) includes a temperature setting section (14)
The setting signal from the outside air temperature sensor (15) and the detection signal from the outside temperature sensor (15) are input to determine whether the cooling operation should be performed or the heating operation should be performed.

The first selector (4) is supplied with a divided voltage signal at the switching terminal of the switch (6) and a voltage signal corrected for heating operation by the correction circuit (2),
One of the voltage signals is selectively output in response to the determination output signal from the cooling/heating determination circuit (3).
.

The second selector (5) is supplied with the divided voltage signal at the switching terminal of the switch (6) and the output signal from the first selector (4).
One of the signals is selectively output in response to the voltage signal at the automatic side terminal of No. 1.

The output signal from the second selector (5) is sent to a control section (not shown) consisting of a microcomputer, etc. via an A/D converter (not shown), an I10 board, etc.
is supplied to.

The operation of the operating state switching device having the above configuration is as follows.

When the operation changeover switch (7) is switched to the cooling side, the resistance (g) + (11) (12) (13) corresponds to the state of the air volume changeover switch (6). A divided voltage signal determined by the combination is output from the switching terminal of the switch (6). And the second selector (5)
Since a high-level selection control signal is supplied to the switch (6), the divided voltage signal is output as is, and cooling operation can be performed based on the information set by the switch (6).

When the operation switching switch (7) is switched to the heating side, the resistance [81([)] (111(12)
)(13) A divided voltage signal determined by the combination of (13) is output from the switching terminal of the switch (6). Since a high-level selection control signal is supplied to the second selector (5), the above-mentioned divided voltage signal is output as is, and heating operation is performed based on the air volume set by the switch (6). Can be done.

That is, in any of the above cases, since the output signal from the first selector (4) is never output through the second selector (5), the correction output by the correction circuit (2) Cooling operation or heating operation can be performed without being affected by the signal at all.

Operation switching switch (when the power is switched to automatic, the ff1ffi switching switch (6)
Corresponding to the state of , the resistance (g)) (11) (12) (1
The divided voltage signal determined by the combination of 3) is applied to the switch (6
) is output from the switching terminal. The divided voltage signal in this case corresponds to the cooling operation selection state, and the division voltage signal corresponding to the heating operation selection state is not outputted at all d1. However, the above divided voltage signal is not corrected by the correction circuit (
'2J, the correction circuit (21
The voltage signal output from the controller corresponds to the heating operation selection state. That is, the first selector (4) is supplied with a divided voltage signal corresponding to the cooling operation selection state and a voltage signal corrected to correspond to the heating operation selection state.

In this state, the first selector (4) is supplied with the determination signal from the cooling/heating determination circuit (3), so if it is determined that the cooling operation should be performed, The above-mentioned divided voltage signal is output, and when it is determined that the heating operation should be performed, the above-mentioned corrected voltage signal is output.

Furthermore, since the second selector (5) is supplied with a low-level selection control signal, the first selector (4)
) is output as is, and the switch (6)
Based on the JJdfa set by JJdfa and the outside temperature, it is possible to perform self-help cooling operation or 1-assisted cooling operation.

In summary, since the above components are stored in the remote control unit 1- for setting the operating status of the air conditioner, it is possible to make only slight changes to the conventional remote control unit or This can be easily handled by simply installing a simple adapter, and it is only necessary to prepare 6 levels of divided voltage, which allows high resolution to be maintained and is virtually unaffected by noise.
This means that v411I can be performed in an accurate driving state.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, the cooling side terminal of the switch (7) and the switch (6)
and the switching terminal of the switch via a resistor.
The correction circuit (2) outputs a correction signal for automatic cooling operation, and it is also possible to reverse the @ signal that is selectively output based on the judgment signal from the cooling/heating judgment circuit (3). In addition to this, various design changes can be made without changing the gist of the invention.

<Effects of the Invention> As described above, the present invention maintains six types of divided voltage signals that are output in response to various states in a voltage dividing resistor circuit, and can perform cooling operation, heating operation, and automatic operation. Qin has the unique effect of being able to easily respond to driving.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing an embodiment of the operating state switching device of the present invention, and FIG. 2 is an electric circuit diagram showing a conventional example. (1)...Voltage dividing resistor circuit, [2)...Correction circuit, (
3)...Cooling/heating determination circuit, (41...first selector, (5)...second selector, (6)...air volume switching switch, (7)... Switch for operation switching,

Claims (1)

[Claims] 1. It has a switch for switching the air volume and an operation switch for switching between cooling, heating, and automatic operation, and the partial pressure signal taken out from the switch for switching the air volume corresponds to the air volume, cooling, and heating. It is set to 6 levels, and
The partial pressure signal taken out from the operation switching switch is taken out from the resistance voltage dividing circuit, which is set in two stages depending on whether self-help operation is selected, and the air volume switching switch in the resistance voltage dividing circuit. a correction means for generating a correction signal for automatic heating operation by inputting a partial pressure signal; a discrimination means for discriminating the type of operation operation based on the set temperature and the measured temperature; a first selection means for selectively outputting a partial pressure signal or a correction signal taken out from the air volume switching switch; and a first selection means for selectively outputting the partial pressure signal or correction signal taken out from the air volume switching switch; 1. An operating state switching device for an air conditioner, comprising second selection means for selectively outputting a partial pressure signal taken out from the switch or an output signal from the first selection means.