JP2701664B2 - Electric valve drive control device for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control device for a motor-operated valve of an air conditioner, and more particularly to a countermeasure for simultaneous driving of a motor-operated valve.

[0002]

2. Description of the Related Art Generally, an air conditioner is disclosed in
As disclosed in Japanese Patent No. 95362, while the outdoor unit and the indoor unit are connected to form a refrigerant circuit, a heat storage unit including a heat storage tank for storing a heat storage medium capable of storing heat is provided in the outdoor unit. The heat exchange coil and the refrigerant circuit in the heat storage tank are connected by a bypass,
Some are configured to switch and connect the bypass path and the refrigerant circuit. By performing heat exchange between the refrigerant and the heat storage medium in the heat exchange coil, a normal cooling / heating operation, a cold storage operation, a storage / heating operation, and the like are performed.

[0003]

In the above-described air conditioner, when performing various operation controls, a plurality of expansion valves and flow rate control valves are provided to control the refrigerant. High-precision control is being performed by applying a motorized valve to the valve. In this case, a plurality of motor-operated valves may be opened and closed at the same time, resulting in a temporary increase in power consumption, and a problem that the capacity of the power transformer must be increased. In particular, in recent years, a large number of motor-operated valves are being provided to improve control accuracy and the like, and power consumption tends to increase. Therefore, new measures for power consumption are desired.

In view of the above, conventionally, power consumption is reduced by sequentially driving the motor-operated valves at predetermined time intervals. However, in this case, since a plurality of motor-operated valves are sequentially driven, there is a problem that responsiveness is poor, and there is a problem that air conditioning comfort is lacking.

The present invention has been made in view of the above circumstances, and has as its object to reduce power consumption when simultaneously driving a plurality of motor-operated valves and improve responsiveness. .

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention takes measures to simultaneously drive a plurality of motor-operated valves so that one-phase excitation and two-phase excitation overlap. Things.

More specifically, as shown in FIG. 1, means taken by the invention according to claim 1 first includes a plurality of exciting coils (A1,
A2, B1, B2) with multiple opening-adjustable motorized valves
It is assumed that the air conditioner includes a refrigerant circuit (9) including (5, 5,...) And operation control means (13) for controlling the operation of the refrigerant circuit (9).

Then, upon receiving a drive signal from the operation control means (13), the excitation coils (A1, A2, B) of the motor-operated valves (5, 5,...)
Opening control means for controlling the opening degree by controlling one-phase excitation and two-phase excitation while controlling (1, B2) the excitation state and the demagnetization state.
(15) is provided. Further, each of the above electric valves (5,5,...)
Start-determination means (16) for outputting a one-phase start signal when the start is one-phase excitation, a two-phase start signal when the start is two-phase excitation, and the operation control means. (1
If the even number of electric valves (5, 5,...) Are driven simultaneously upon receiving the drive signal of 3), the drive discriminating means (1
7) is provided. In addition, when the simultaneous drive signal of the drive discriminating means (17) is received, half of the motor-operated valves (5, 5,.
) Is in the one-phase excitation state, the excitation phase control means (18) which outputs an excitation signal to the opening degree control means (15) so that the other electric valves (5, 5,...) Are driven in the two-phase excitation state. ) Is provided.

Further, the means of the present invention according to claim 2 receives the drive signal of the operation control means (13) instead of the drive discriminating means and the excitation phase control means in the invention of claim 1 described above.
When the (2a + 1) (a is an integer) electric valves (5, 5,...) Are simultaneously driven, a drive discriminating means (17) for outputting a simultaneous drive signal;
Upon receiving the simultaneous drive signal of the drive discriminating means (17), the a motor-operated valves (5, 5,...) Are excited by one phase based on the one-phase starting signal and the two-phase starting signal of the starting discriminating means (16). In this state, the excitation phase control means (1) outputs an excitation signal to the opening degree control means (15) so that the other motor-operated valves (5, 5, ...) are driven in the two-phase excitation state.
8).

[0010]

According to the first aspect of the present invention,
First, the operation control means (13) controls the operation of the refrigerant circuit (9),
For example, the air conditioning operation is controlled by controlling the capacity of the compressor. And the operation control means (13) is an opening degree control means (15)
When a drive signal for the motor-operated valves (5, 5, ...) is output to the motor, the opening control means (15) causes the excitation coils (A1,
A2, B1, B2) are controlled to the excitation state and the demagnetization state, and the opening degree is controlled by repeating one-phase excitation and two-phase excitation. At this time, the start determining means (16) determines the starting excitation phase of each of the electric valves (5, 5,...) Based on the control signal of the opening control means (15). If there is, the one-phase start signal is output, and if the two-phase excitation is started, the two-phase start signal is output.
If the even number of electric valves (5, 5,...) Are driven simultaneously upon receiving the drive signal of (13), a simultaneous drive signal will be output.

According to the second aspect of the present invention, the drive discriminating means (17) receives (2a + 1) (a is an integer) electric motors in response to a drive signal from the operation control means (13). If the valves (5,5, ...) are driven simultaneously, a simultaneous drive signal will be output,
Upon receiving the simultaneous drive signal of the drive discriminating means (17), the excitation phase control means (18) receives an even number of electric valves (5) based on the one-phase starting signal and the two-phase starting signal of the starting discriminating means (16). , 5,...) Are driven simultaneously, half of the motor-operated valves (5,5,...) Are in one-phase excitation and the other motor-operated valves (5,5,...) Are driven in two-phase excitation. And an odd number of (2a + 1) motorized valves (5,5,…)
Are simultaneously driven, the above-mentioned operation is performed such that when the a motorized valves (5, 5,...) Are in the one-phase excitation state, the other motorized valves (5, 5,...) Are driven in the two-phase excitation state. An excitation signal is output to the opening control means (15). As a result, driving of two-phase excitation is not performed at the same time, and power consumption is reduced.

[0012]

Therefore, according to the first and second aspects of the present invention, when simultaneously driving a plurality of motor-operated valves (5, 5,...),
Since the phase excitation and the two-phase excitation are driven so as to overlap,
Since it is possible to prevent only two-phase excitation from being superimposed, it is possible to prevent an increase in power consumption. In particular, the power consumption can be suppressed as the number of simultaneously driven electric valves (5, 5,...) Increases. As a result, the cost of the power supply circuit can be reduced without increasing the capacity of the power supply circuit, and at the same time, the heat generation of the power supply circuit can be reduced. Can be improved.

[0013] Further, since the motor-operated valves (5, 5, ...) are simultaneously driven, the responsiveness does not decrease, a comfortable air-conditioning operation can be performed, and a decrease in comfort can be prevented. Can be.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 shows a refrigerant piping system of an air conditioner to which the present invention is applied, which is a so-called separate type in which one indoor unit (Y2) is connected to one outdoor unit (Y1). A plurality (two in FIG. 2) of the outdoor unit (Y1) and the indoor unit (Y2) are provided.

The outdoor unit (Y1) includes a scroll type compressor (1) whose operating frequency is variably adjusted by an inverter, and a cutoff as shown by a solid line in the cooling operation and a broken line in the heating operation. Replacement four-way switching valve (2)
An outdoor heat exchanger (3) that functions as a condenser during cooling operation and an evaporator during heating operation, a decompression unit (20) for decompressing refrigerant, and a suction pipe of the compressor (1). And
Accumulator for removing liquid refrigerant in suction refrigerant
(7) are arranged as main equipment. The indoor unit (Y2) is provided with an indoor heat exchanger (6) that functions as an evaporator during the cooling operation and as a condenser during the heating operation. Then, the compressor (1) and the four-way switching valve (2)
And outdoor heat exchanger (3), decompression unit (20), and indoor heat exchanger
(6) and the accumulator (7) are sequentially connected by a pipe (8) to form a main circuit (9a, 9b) for causing heat transfer by circulation of the refrigerant, and the first main circuit (9a ) And the second main circuit (9b) constitute a refrigerant circuit (9).

Here, the pressure reducing section (20) includes a bridge-shaped rectifier circuit (8a) and a pair of connection points in the rectifier circuit (8a).
(P, Q) connected to a common path (8a), said common path (8a)
There is a receiver (4) for storing the liquid refrigerant, an auxiliary heat exchanger (3a) for the outdoor heat exchanger (3), and an electric expansion valve which is an electric valve having a function of reducing the pressure of the liquid refrigerant and a function of adjusting the flow rate. The valve (5) is arranged in series. And, at the other pair of connection points (R, S) in the rectifier circuit (8a), the outdoor heat exchanger (3)
Side pipe (8) and the indoor heat exchanger (6) side pipe (8) are connected. Further, the rectifier circuit (8a) is connected to the common path (8
The connection point on the upstream side (P) of a) and the connection point on the outdoor heat exchanger (3) side
(S) and a first inflow passage provided with a first check valve (D1) that allows only refrigerant flow from the external heat exchanger (3) to the receiver (4).
(8b1) and the connection point (P) on the upstream side of the common path (8a) and the connection point (R) on the indoor heat exchanger (6) side, and from the indoor heat exchanger (6) to the receiver (4). Check valve allowing only refrigerant flow
(D2), a second inflow path (8b2), a downstream connection point (Q) of the common path (8a) and a connection point (R) on the indoor heat exchanger (6) side, and an electric expansion valve. The first outflow path (8c) having a third check valve (D3) that allows only refrigerant flow from (5) to the indoor heat exchanger (6)
1), a connection point (Q) on the downstream side of the common path (8a) and a connection point (S) on the outdoor heat exchanger (3) side, and the electric expansion valve (5) is connected to the outdoor heat exchanger (3). And a second outflow path (8c2) provided with a fourth check valve (D4) that allows only the flow of the refrigerant to (8).

The common path (8) in the rectifier circuit (8a)
a) Capillary tube (C) between both connection points (P, Q)
A liquid ring prevention bypass path (8f) is provided,
The liquid ring prevention bypass path (8f) prevents liquid ringing when the compressor (1) is stopped, while opening and closing the upper part of the receiver (4) and the downstream side of the common path (8a). A gas vent path (4a) provided with a valve (SV) is connected. The degree of pressure reduction of the capillary tube (C) is set to be sufficiently larger than that of the electric expansion valve (5), so that the refrigerant flow control function of the electric expansion valve (5) during normal operation is maintained well. It has been made possible.

Further, (F1 to F4) are filters for removing dust in the refrigerant, and (ER) is a silencer for reducing the operation noise of the compressor (1). Further, the air conditioner is provided with sensors, and (Thd) is a compressor (1)
(Tha) is an outdoor suction sensor that is disposed at the air suction port of the outdoor unit (Y1) and detects a suction air temperature Ta that is an outside air temperature. , (Thc) is arranged in the outdoor heat exchanger (3),
An external heat exchange sensor that detects an external heat exchange temperature Tc that becomes a condensing temperature during a cooling operation and becomes an evaporating temperature during a heating operation, (Thr)
Is an indoor suction sensor that is disposed at the air suction port of the indoor unit (Y2) and detects the suction air temperature Tr that is the indoor temperature;
(The) is disposed in the indoor heat exchanger (6), the internal heat exchange sensor that detects the internal heat exchange temperature Te that becomes the evaporating temperature during the cooling operation and becomes the condensing temperature during the heating operation, and (HPS) is the high pressure A high pressure switch that detects a refrigerant pressure and outputs a high pressure signal by being turned on by an excessive rise of the high pressure refrigerant pressure, (LPS)
Is a low-pressure switch that detects the low-pressure refrigerant pressure and turns on when a low-pressure refrigerant pressure is excessively low to output a low-pressure signal.

The output signals of the sensors (Thd,..., The) and the switches (HPS, LPS) are sent to the controller (10).
The controller (10) includes a CPU (11) as shown in FIG. 3, and the CPU (11)
It controls the outdoor unit (Y1) and exchanges control signals with a CPU (not shown) that controls the indoor unit (Y2) via an interface circuit. Further, the CPU (11)
The above, the discharge pipe sensor (Thd) and the outdoor suction sensor (Tha)
And an external heat exchange sensor (Thc) .Operation control means (13) is provided. The operation control means (13) controls the capacity of the compressor (1) based on an input signal. Each main circuit
It is configured to control the air conditioning operation of (9a, 9b).

In each of the main circuits (9a, 9b) described above, during the cooling operation, the liquid refrigerant condensed and liquefied in the outdoor heat exchanger (3) flows in from the first inflow path (8b1), and the first check is performed. After being stored in the receiver (4) through the valve (D1) and decompressed by the electric expansion valve (5), it is evaporated in the indoor heat exchanger (6) through the first outflow passage (8c1) and evaporates in the compressor (1). In the heating operation, the liquid refrigerant condensed and liquefied in the indoor heat exchanger (6)
After flowing in from the inflow passage (8b2), it is stored in the receiver (4) through the second check valve (D2), decompressed by the electric expansion valve (5), and then passed through the second outflow passage (8c2). The circulation evaporates in the exchanger (3) and returns to the compressor (1).

Further, the CPU (11) includes a drive circuit.
Two electric expansion valves (5, 5) are connected via (14), and each of the electric expansion valves (5, 5) has four exciting coils (A
1, A2, B1, B2) are provided so that the opening can be adjusted. The CPU (11) includes an operation control unit (13).
Besides, as features of the present invention, there are provided an opening degree control means (15), a start determination means (16), a drive determination means (17), and an excitation phase control means (18). The opening control means (15) is an operation control means.
In response to the drive signal of (13), the excitation coils (A1, A2, B1, B2) of the respective electric expansion valves (5, 5) are controlled to be in an excited state and a demagnetized state, and are also one-phase excited and two-phase excited. Are repeatedly performed to control the opening degree. Specifically, the opening control means
(15) shows each excitation coil for every three pulses as shown in FIG.
(A1, A2, B1, B2) is controlled to the excited state, and one excitation coil (A1, A2, B1, B2) and two excitation coils (A1, A2, B1, B2) are connected for each pulse. Excited. For example, this one pulse is set to 32 msec. After exciting only the exciting coil (A1) by pulse 1, the exciting coil (A1) and exciting coil (B1) are excited by the next pulse 2, and the next pulse 3
After exciting only the exciting coil (B1) in step (4), the exciting coil (B1) and the exciting coil (A2) are excited in the next pulse 4. continue,
After exciting only the exciting coil (A2) with the next pulse 5, exciting the exciting coil (A2) and the exciting coil (B2) with the next pulse 6, and exciting only the exciting coil (B2) with the next pulse 7 After doing
In the next pulse 8, the exciting coil (B2) and the exciting coil (A1) are excited. By repeating this operation, the opening control means (15)
Each electric expansion valve (5, 5) is controlled to a predetermined opening. Then, the opening degree control means (15) is linked to the capacity of the compressor, and controls the external heat exchange temperature so that the discharge pipe temperature Td becomes an optimum value.
The opening degree is calculated from Tc and the internal heat exchange temperature Te to calculate the electric expansion valve (5,
5) is controlled.

On the other hand, the start judging means (16) judges the start excitation phase of each electric valve, that is, each electric expansion valve (5, 5).
Since the opening degree of 5) is stored, a one-phase starting signal is output when the one-phase excitation is started and a two-phase starting signal is output when the two-phase excitation is started based on the opening pulse. Have been. Further, the drive discriminating means (17) outputs a simultaneous drive signal when the two electric expansion valves (5, 5) are driven simultaneously upon receiving the drive signal from the operation control means (13). It is configured. When the excitation phase control means (18) receives the simultaneous drive signal of the drive determination means (17), the start-up determination means (1)
When one of the electric expansion valves (5) is in the one-phase excitation state based on the one-phase start signal and the two-phase start signal of (6), the other electric expansion valve is
(5) The opening degree control means such that the drive is performed in a two-phase excitation state.
The excitation signal is output to (15). That is, the excitation phase control means (18) is provided with the electric expansion valve of the first main circuit (9a).
When (5) is in the one-phase excitation state, an excitation signal is output so that the electric expansion valve (5) of the second main circuit (9b) is in the two-phase excitation state.

Next, the opening control of the two electric expansion valves (5, 5) will be described with reference to a control flow shown in FIG.
First, the opening control means (15) includes two main circuits (9a, 9b).
The opening degree of the electric expansion valves (5, 5) is controlled by a drive signal from the operation control means (13) so that the discharge pipe temperature Td becomes an optimum value. Therefore, in step ST1, the drive determining means (17)
Are the electric expansion valve (5) of the first main circuit (9a) and the second main circuit (9b)
It is determined whether or not the electric expansion valves (5) and (5) of the first main circuit (9a) are driven simultaneously. (5) or second
When any one of the electric expansion valves (5) of the main circuit (9b) is driven alone, the operation returns and the opening control means (15) returns to the first position based on the drive signal of the operation control means (13). The electric expansion valve (5) of the main circuit (9a) or the electric expansion valve (5) of the second main circuit (9b) is opened.

On the other hand, in step ST1, when the electric expansion valve (5) of the first main circuit (9a) and the electric expansion valve (5) of the second main circuit (9b) are simultaneously driven, Judgment is YES
Then, the process proceeds to step ST2, where the start determination means (16) determines whether the electric expansion valve (5) of the first main circuit (9a) starts driving from one-phase excitation. That is, it is determined whether or not the pulses are the pulses 1, 3, 5, and 7 shown in FIG. 4 from the pulse of the current opening degree.
If the determination in ST2 is YES, the process proceeds to step ST3. Next, the start determination means (16) sets the electric expansion valve of the second main circuit (9b).
(5) Step ST determines whether or not to start driving from one-phase excitation.
The determination is made in the same way as 2. The electric expansion valve (5) of the second main circuit (9b) is connected to the pulses 2, 4, 6 and 8 shown in FIG.
When starting with phase excitation, the determination in step ST3 is NO.
Then, the process proceeds to step ST4, in which the electric expansion valve (5) of the first main circuit (9a) and the electric expansion valve (5) of the second main circuit (9b) are simultaneously driven and return. .

If it is determined in step ST3 that the electric expansion valve (5) of the second main circuit (9b) has started driving one-phase excitation, that is, the electric expansion valve of the first main circuit (9a) has been started. If both (5) and the electric expansion valve (5) of the second main circuit (9b) are to start driving of one-phase excitation, the determination is YES and the step is performed.
Moving to ST5, the excitation phase control means (18) outputs an excitation signal to the opening degree control means (15), and first, the electric expansion valve of the first main circuit (9a).
(5) is driven. Thereafter, the process proceeds to step ST6, in which it is determined whether or not the one-phase excitation of the electric expansion valve (5) of the first main circuit (9a) has been completed, and the process proceeds to step ST6 until the one-phase excitation has been completed. stand by. Subsequently, when the one-phase excitation of the electric expansion valve (5) of the first main circuit (9a) is completed, the process proceeds from step ST6 to step ST7, where the electric expansion valve (5) of the second main circuit (9b) is turned off. ) To return. That is, when the electric expansion valve (5) of the first main circuit (9a) is two-phase excited, the one-phase excitation of the electric expansion valve (5) of the second main circuit (9b) is started. As described above, the two electric expansion valves (5, 5) are driven so that the two-phase excitation states do not overlap.

[0026]

[Table 1]

In step ST2, when the electric expansion valve (5) of the first main circuit (9a) starts driving from two-phase excitation, the determination is NO and the process proceeds to step ST8.
In the same manner as in step ST3, the start determination means (16)
It is determined whether the electric expansion valve (5) of the main circuit (9b) starts driving from two-phase excitation. If the electric expansion valve (5) of the second main circuit (9b) starts with one-phase excitation, the determination in step ST3 becomes NO and the process proceeds to step ST4, where the first
The electric expansion valve (5) of the main circuit (9a) and the electric expansion valve (5) of the second main circuit (9b) are simultaneously driven and return.

If it is determined in step ST8 that the electric expansion valve (5) of the second main circuit (9b) has started driving two-phase excitation, that is, the electric expansion valve of the first main circuit (9a) has been started. If both (5) and the electric expansion valve (5) of the second main circuit (9b) are to start driving of two-phase excitation, the determination is YES and the step is performed.
Moving to ST9, the excitation phase control means (18) outputs an excitation signal to the opening degree control means (15), and first, the electric expansion valve of the first main circuit (9a).
(5) is driven. Thereafter, the process proceeds to step ST10, where it is determined whether or not the two-phase excitation driving of the electric expansion valve (5) of the first main circuit (9a) has been completed, and the process proceeds to step ST10 until the two-phase excitation driving has been completed. stand by. Subsequently, when the two-phase excitation driving of the electric expansion valve (5) of the first main circuit (9a) is completed, the process proceeds from step ST10 to step ST11, where the electric expansion valve (5) of the second main circuit (9b) is turned off. ) To return. That is, when the electric expansion valve (5) of the first main circuit (9a) is one-phase excited, the two-phase excitation of the electric expansion valve (5) of the second main circuit (9b) is started, and the two-phase excitation state is started. Are driven so that both electric expansion valves (5, 5) are driven.

Therefore, according to the present embodiment, when the two electric expansion valves (5, 5) are simultaneously driven, they are driven so that the one-phase excitation and the two-phase excitation are superimposed. Since overlapping can be prevented, an increase in power consumption can be prevented. That is, as shown in Table 1 above, if the current consumption of one phase of the electric expansion valve (5, 5) is I (for example, I = 260 mA), the current consumption of the electric expansion valve (5, 5) is always 3I. Thus, current consumption can be reduced as compared with 4I in which two-phase excitation is superimposed. In particular, power consumption can be suppressed as the number of simultaneously driven electric expansion valves (5, 5) increases. As a result, the cost of the power supply circuit can be reduced without increasing the capacity of the power supply circuit, and at the same time, the heat generation of the power supply circuit can be reduced. Can be improved.

Further, since the electric expansion valves (5, 5) are simultaneously driven, the responsiveness does not decrease, a comfortable air-conditioning operation can be performed, and a decrease in comfort can be prevented. it can.

In the above-described embodiment, the case where an even number of electric expansion valves (5, 5) are simultaneously driven has been described.
The excitation phase control means (18) according to the invention according to the present invention, when the drive determination means (17) determines that the odd number of electric expansion valves (5, 5,...) Are simultaneously driven, that is, when a is an integer, 2a + 1)
When the electric expansion valves (5,5,...) Are simultaneously driven, a
.. Are controlled to be in a two-phase excited state while the other electric expansion valves (5, 5,...) Are in a one-phase excited state. Specifically, three electric expansion valves (5,5,…
) Are driven simultaneously, two electric expansion valves (5, 5)
When one is in the one-phase excitation state, the other electric expansion valve (5)
Control is performed so as to be in a phase excitation state.

In the first embodiment, the case where two electric expansion valves (5, 5) are driven has been described, but four or more even number of electric expansion valves (5, 5,...) Are used. Of course, it can be applied to the case of driving. Further, in the present embodiment, the electric expansion valve (5, 5) has been described, but the present invention can be applied to an electric valve whose opening can be adjusted, such as a flow control valve. Further, the present invention is not limited to the refrigerant circuit (9) of the embodiment.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of the present invention.

FIG. 2 is a refrigerant circuit diagram illustrating a refrigerant circuit of the air conditioner.

FIG. 3 is a block diagram showing a controller.

FIG. 4 is a state diagram showing an excitation phase of the electric expansion valve.

FIG. 5 is a control flowchart showing a driving state of the electric expansion valve.

[Explanation of symbols]

 5 Electric expansion valve 9 Refrigerant circuit 11 CPU 13 Operation control means 15 Openness control means 16 Start discrimination means 17 Drive discrimination means 18 Excitation phase control means A1, A2, B1, B2 Excitation coil

Claims (2)

(57) [Claims] 1. A refrigerant circuit (9) comprising a plurality of motorized valves (5, 5,...) Having a plurality of excitation coils (A1, A2, B1, B2) and capable of adjusting an opening degree; An operation control means (13) for controlling the operation of the circuit (9), wherein the motor-operated valve receives a drive signal from the operation control means (13).
Opening control means for controlling the exciting coils (A1, A2, B1, B2) of (5,5,...) Between an excited state and a demagnetized state and controlling the opening degree by repeating one-phase excitation and two-phase excitation. (15) and the starting excitation phase of each of the motor-operated valves (5, 5,...) Is determined. If the starting is one-phase excitation, the one-phase starting signal is obtained. Start determination means (16) for outputting
A drive discriminating means (17) for outputting a simultaneous drive signal when the even number of motor-operated valves (5, 5, ...) are driven simultaneously upon receiving the drive signal from the operation control means (13); When the simultaneous drive signal of the determination means (17) is received, half of the motor-operated valves (5, 5, ...) are in the one-phase excitation state based on the one-phase start signal and the two-phase start signal of the start determination means (16). The excitation phase control means (1) outputs an excitation signal to the opening degree control means (15) so that the other motorized valves (5, 5, ...) are driven in the two-phase excitation state.
8) An electric valve drive control device for an air conditioner, comprising: 2. A refrigerant circuit (9) comprising a plurality of motorized valves (5, 5,...) Having a plurality of exciting coils (A1, A2, B1, B2) and capable of adjusting the opening degree; An operation control means (13) for controlling the operation of the circuit (9), wherein the motor-operated valve receives a drive signal from the operation control means (13).
Opening control means for controlling the exciting coils (A1, A2, B1, B2) of (5,5,...) Between an excited state and a demagnetized state and controlling the opening degree by repeating one-phase excitation and two-phase excitation. (15) and the starting excitation phase of each of the motor-operated valves (5, 5,...) Is determined. If the starting is one-phase excitation, the one-phase starting signal is obtained. Start determination means (16) for outputting
In response to the drive signal of the operation control means (13), (2a + 1) (a
) Are driven simultaneously, the drive discriminating means (17) for outputting a simultaneous drive signal, and upon receiving the simultaneous drive signal of the drive discriminating means (17), start Based on the one-phase start signal and the two-phase start signal of the discriminating means (16), when the a motorized valves (5, 5, ...) are in the one-phase excitation state, the other motorized valves (5, 5, ...) are turned on. Excitation phase control means (1) for outputting an excitation signal to the opening control means (15) so as to drive in the two-phase excitation state.
8) An electric valve drive control device for an air conditioner, comprising: