JP6757088B2 - Solenoid valve control device and motorized valve device equipped with it - Google Patents

Description

The present invention relates to an electric valve control device and an electric valve device provided with the electric valve control device, and more particularly to an electric valve control device for controlling the valve opening degree of the electric valve and an electric valve device provided with the electric valve control device.

Conventionally, in refrigeration cycle systems used for air conditioners, refrigeration / freezing showcases, etc., the flow rate of circulating refrigerant is adjusted for the purpose of stabilizing the cooling capacity, keeping the degree of superheat constant, and operating efficiently. However, in order to make adjustments at that time with high accuracy, an electric valve, which is an electric expansion valve that operates a valve body by a stepping motor, is widely used as an expansion valve for flow rate control. There are also electric valves such as a shut valve that opens and closes the flow path of the refrigerant to flow or shut off the flow path of the refrigerant by using a stepping motor, and a three-way valve (flow path switching valve) that switches the flow direction of the refrigerant.

However, in an electric valve or the like using the stepping motor described above, it is common to control the opening degree by using open loop control that does not feed back the absolute opening degree (actual opening degree), and the inside of the valve. When the power supply is stopped, the valve body does not return to the initial position, but stops at the position when the power is cut off. Therefore, there is a problem that the position (absolute opening degree) at which the valve body is stopped cannot be accurately grasped when the power is turned on next time.

Therefore, when controlling an electric valve or the like using the stepping motor, initialization processing (also referred to as origin positioning, base point positioning, or initialization) is executed when the power is normally turned on, and the valve body is controlled. The control of the opening degree is started after the positioning is performed (see, for example, Patent Document 1). Here, the initialization process is the number of pulses exceeding the total stroke from the fully open position to the fully closed position or from the fully closed position to the fully open position. Specifically, for example, the rotor of the stepping motor is surely used as a detent called a stopper. This is a process of sufficiently rotating the stepping motor in the valve closing direction or the valve opening direction by the number of pulses that collide and stop the rotation, thereby determining the initial position of the 0 pulse or the maximum pulse of the electric valve.

Japanese Patent No. 4032993

By the way, in the initialization process, for example, the stepping motor is operated over the control pulse range (for example, 700 pulses or more), so that for an electric valve having a control range of 0 to 500 pulses and an excitation speed of 80 pps, for example, 700 ÷ 80 = 8.75 seconds. The above time is required. Normally, this initialization process is executed by stopping the operation of the compressor or the like constituting the refrigeration cycle (see, for example, Patent Document 1), and during this period, the system (refrigeration cycle system) is electrically operated. It is not possible to control the opening of the valve to adjust the flow rate of the fluid (refrigerant).

That is, in the prior art, since the control device of the system does not take a measure to know the implementation status of the initialization process, it waits for more than the time expected to end the initialization process (initialization operation of the solenoid valve). There was a problem that the control start of the system (that is, the motorized valve) was delayed. Further, even if the opening degree control of the solenoid valve is attempted even during the initialization operation, there is a problem that the opening degree control of the solenoid valve is not performed until the initialization process is completed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the standby period of the control device of the system to prevent a delay in starting control (opening control) of the solenoid valve. It is an object of the present invention to provide an electric valve control device capable of capable of using the above and an electric valve device provided with the same.

In order to solve the above-mentioned problems, the motor-operated valve control device according to the present invention is an electric valve control device that controls a valve body and a valve opening degree of an electric valve provided with a stepping motor for driving the valve body. When the signal of the initialization operation interruption instruction is received from the outside during the initialization operation of the solenoid valve, the initialization operation of the solenoid valve is interrupted, the signal of the completion of the initialization operation is transmitted to the outside, and the signal instructing the normal operation is transmitted. When received from the outside, the motorized valve is in a normal operating state, and a signal informing that the motorized valve is in a normal operating state is transmitted to the outside.

Preferably, the valve opening degree of the electric valve is controlled within the range of the full stroke from the fully open position to the fully closed position or from the fully closed position to the fully open position based on the number of pulses according to the rotation amount of the stepping motor. It has a storage unit that stores the current number of pulses corresponding to the current valve opening degree of the electric valve, and the initialization operation of the electric valve is performed by the entire electric valve regardless of the current number of pulses. Derived based on the first initialization operation of rotating a predetermined number of pulses equal to or greater than the maximum number of pulses for operating the stroke range in the valve closing direction or the valve opening direction, and the current number of pulses stored in the storage unit. The second initialization operation of rotating the number of pulses in the valve closing direction or the valve opening direction is included, and the second initialization operation is an operation of rotating the number of pulses equal to or greater than the current number of pulses only in the valve closing direction. Or, it is an operation of rotating the number of pulses equal to or greater than the number of pulses obtained by subtracting the current number of pulses from the maximum number of pulses only in the valve opening direction.

In a further preferred embodiment, when the initialization operation is completed or when the initialization operation is interrupted, the state of completion of the initialization operation is written in the transmission buffer register, and when a transmission request signal is received from the outside, the transmission buffer is described. The contents written in the register are transmitted to the outside.

In a further preferred embodiment, the state of the initialization operation is written to the transmission buffer register during the initialization operation, and when the transmission request signal is received from the outside, the content written in the transmission buffer register is transmitted to the outside. Send.

In another preferred embodiment, the motor having a storage unit that stores the current position of the motorized valve, and after interrupting the initialization operation during the initialization operation, receives a signal instructing the normal operation from the outside to enter the state of the normal operation. When this happens, the valve opening degree of the motorized valve is controlled based on the current position stored in the storage unit.

In another preferred embodiment, it is connected to the outside by LIN communication or CAN communication.

Further, the motor-operated valve device according to the present invention is characterized in that the motor-operated valve control device and the motor-operated valve are integrally assembled.

According to the present invention, the motor-operated valve control device that controls the valve opening degree of the motor-operated valve outputs a signal notifying the end of the initializing operation or a signal notifying the interruption of the initializing operation after the initializing operation of the motor-operated valve is completed or the initializing operation is interrupted. Therefore, the control device of the system can grasp the end of the initialization operation or the interruption of the initialization operation, and after the motorized valve control device returns to the normal operation after the end of the initialization operation or the interruption of the initialization operation (for example, immediately after the end of the initialization operation or the interruption of the initialization operation). ), Since the opening control of the solenoid valve can be started, it is possible to reduce the standby period of the control device of the system and prevent the delay of starting the control (opening control) of the solenoid valve.

FIG. 3 is a system block diagram of a first embodiment of a solenoid valve control device according to the present invention and a solenoid valve device including the motorized valve control device. The figure which shows the transmission buffer register in the LIN communication of the motor-operated valve control device shown in FIG. The figure which shows the receive buffer register in the LIN communication of the motor-operated valve control device shown in FIG. The flowchart which shows the processing flow of the initialization processing by the motor-operated valve control device shown in FIG. The flowchart which shows the processing flow of the initialization processing by the 2nd Embodiment of the electric valve control device which concerns on this invention. The flowchart which shows the processing flow of the initialization processing by the 3rd Embodiment of the electric valve control device which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment)
FIG. 1 is a system block diagram of a first embodiment of an electric valve control device according to the present invention and an electric valve device provided with the same. In the following description, a case where the motorized valve control device according to the present invention is applied to the expansion valve of the refrigeration cycle system used in a car air conditioner will be described as an example.

In the motorized valve device 12 of the illustrated embodiment, the motor-operated valve 9 and the motor-operated valve control device 11 are connected by a lead wire or the like and are assembled integrally rather than being located at a remote location. It is composed of an expansion valve 5 having a valve body (not shown) for controlling the flow rate of a fluid (refrigerant) and a stepping motor 8 for driving the valve body of the expansion valve 5, and the expansion valve 5 is formed by rotating the stepping motor 8. The valve opening degree of the (motorized valve 9) is adjusted. The expansion valve 5 may be a shut valve that opens and closes the flow path of the refrigerant to flow or shut off the refrigerant, or a three-way valve (flow path switching valve) that switches the flow direction of the refrigerant.

Although not shown, in a refrigeration cycle system used for a car air conditioner, for example, a compressor, a condenser, the electric valve 9 (expansion valve 5), and an evaporator are sequentially connected via piping. The flow rate of the refrigerant flowing through the pipe is controlled by adjusting the valve opening degree of the motorized valve 9 (expansion valve 5).

The vehicle battery power supply (+ Vb, GND) is connected to the motor-operated valve control device 11, and an in-vehicle LAN used for communication in the vehicle, for example, a LIN bus (or CAN bus) 14, is connected. .. The electric valve control device 11 operates as a slave node and is a LIN communication signal (CAN communication signal in the case of a CAN bus) transmitted from an air conditioner ECU 16 of a master node which is a control device of a system connected to the same LIN bus 14. Then, commands such as the number of pulses of the stepping motor 8 and the signal of the initialization operation instruction are received, and the opening degree (valve opening degree) of the electric valve 9 (expansion valve 5) is controlled.

The communication method between the air conditioner ECU 16 and the electric valve control device 11 includes input / output to the serial interface (LIN communication, CAN communication, etc.) and input / output to the I / O port by a digital signal (LIN communication, CAN communication, etc.) as described above. There are input / output by ON-OFF signal etc.), wireless (Wi-Fi (registered trademark), Bluetooth (registered trademark) etc.), any method may be adopted, and it is limited to the above-mentioned LIN communication or CAN communication. Not done.

The electric valve control device 11 mainly receives a regulator 11a that generates a power supply + Vc (for example, + 5Vdc) used in the internal circuit of the electric valve control device 11 from a battery power supply + Vb (for example, + 12Vdc), and an air conditioner ECU 16 through a LIN bus 14. A ROM that stores a program that controls the rotation of the stepping motor 8 based on the transmitted LIN communication signal, a CPU that executes and performs arithmetic processing of the program stored in the ROM, and a program such as the status of initialization operation and communication data. RAM that temporarily stores data required for execution, I / O circuit that inputs / outputs to and from peripheral circuits, timer that measures time for interrupt processing, A / D converter that converts analog signals to digital values, etc. LIN as a communication means connected to the LIN bus 14 and the microcomputer 11b provided with the above, converting the voltage level of the LIN bus 14 into the circuit voltage level inside the electric valve control device 11 and enabling LIN communication with the microcomputer 11b. It is connected to the transceiver 11c, the stepping motor driver 11d that controls the rotation of the stepping motor 8 of the electric valve 9 based on the drive signal from the microcomputer 11b, and the microcomputer 11b, and the battery power of the RAM data of the microcomputer 11b is cut off. An EEPROM 11e, which is a non-volatile memory as a storage means for storing data that needs to be retained, is mounted on a substrate (not shown). The microcomputer 11b and the stepping motor driver 11d constitute both a valve opening control means and an initialization control means. An IC in which two or more of the regulator 11a, the LIN transceiver 11c, the stepping motor driver 11d, the EEPROM 11e, and the microcomputer 11b are integrally configured may be used, and in that case, the device can be further miniaturized.

The specific configuration of the solenoid valve control device 11 is not limited to the above configuration, and if the present invention can be implemented (that is, valve opening control and initialization control of the solenoid valve 9 can be implemented). Any configuration may be used.

Since the air conditioner ECU 16 needs to determine, for example, 0 pulse as the initial position of the motor-operated valve 9 when the battery power is turned on to the motor-operated valve control device 11, the stepping motor 8 is rotated in the valve closing direction by, for example, the maximum number of pulses or more. An instruction to execute the initialization operation (first initialization operation) is transmitted to the motor-operated valve control device 11 by a LIN communication signal via the LIN bus 14.

Since the electric valve control device 11 that has received the LIN communication signal does not know the current position (number of pulses) of the stepping motor 8 when the battery power is turned on, the maximum number of pulses that the electric valve 9 can control (for example, 500 pulses). Initialization processing (initialization of the electric valve 9) that rotates the stepping motor 8 in the valve closing direction by the number of pulses (for example, 700 pulses or more) to which a sufficient number of pulses are added so that the rotor surely collides with the stopper (rotation stop). Operation) (initial positioning of 0 pulse) is performed. In addition, instead of the initialization process of rotating the stepping motor 8 in the valve closing direction, the initialization process of rotating the stepping motor 8 in the valve opening direction may be performed.

In this example, in order to execute the initialization process, a transmission buffer register (for 2 bits) for writing the initialization status bits (0 to 3) as shown in FIG. 2 to the electric valve control device 11 is used. A receive buffer register (for 2 bits) for writing the initialization signal bits (0 to 3) as shown in FIG. 3 is prepared, and the content received from the air conditioner ECU 16 (instruction content of the air conditioner ECU 16) is stored in the receive buffer register. The contents (details will be described later) that are written and transmitted from the electric valve control device 11 to the air conditioner ECU 16 (the implementation status of the initialization operation) are written in the transmission buffer register.

Next, the processing flow of the initialization processing by the motor-operated valve control device 11 (microcomputer 11b) will be described with reference to FIG. This process is executed, for example, at regular time intervals.

First, in the microcomputer 11b, when the initialization status bit of the transmission buffer register is 0: normal operation (step S21: Yes), the initialization signal bit of the reception buffer register from the air conditioner ECU 16 is 1: the maximum number of pulses or more in the valve closing direction. When an operation instruction, which is an initialization operation instruction to be rotated, is received (step S22: Yes), the initialization status bit of the transmission buffer register is set to 1: during the initialization operation of rotating the valve in the valve closing direction by the maximum number of pulses or more (step S23). The stepping motor 8 is rotated in the valve closing direction by the maximum number of pulses or more (for example, 700 pulses or more) (step S24).

The motorized valve control device 11 outputs a signal during the initialization operation to the air conditioner ECU 16, and while the air conditioner ECU 16 receives the signal during the initializing operation, the air conditioner ECU 16 interrupts the opening control of the motorized valve 9.

The microcomputer 11b confirms at regular time intervals whether or not the stepping motor 8 has rotated in the valve closing direction by the maximum number of pulses or more (for example, 700 pulses or more) (step S25), and the stepping motor 8 has the maximum pulse number or more in the valve closing direction. After confirming that the rotation has been made to (that is, when the initialization operation has been executed and processed), the initialization status bit of the transmission buffer register is set to 3: Initialization operation end (step S26).

When the air conditioner ECU 16 receives the initialization operation end signal output from the electric valve control device 11, the electric valve control device 11 transmits an instruction signal for setting the initialization signal bit of the reception buffer register to 0: normal operation to the microcomputer 11b. To do.

Next, when the microcomputer 11b receives an operation instruction from the air conditioner ECU 16 that the initialization signal bit of the reception buffer register is 0: normal operation (step S27: Yes), the microcomputer 11b sets the initialization status bit of the transmission buffer register to 0: normal operation. (Step S28), the electric valve 9 is in the normal operation state, and the opening control of the electric valve 9 is started according to the instruction of the air conditioner ECU 16.

When the initialization status bit of the transmission buffer register is 0: normal operation (step S21: No), or when the initialization signal (signal instructing the initialization operation) is not received from the air conditioner ECU 16 (step S22: No), End the process without doing anything.

When the microcomputer 11b receives the transmission request signal from the air conditioner ECU 16 via the LIN bus 14, the contents of the transmission buffer register at that time are transmitted to the air conditioner ECU 16 through the LIN transceiver 11c and the LIN bus 14 which are communication means. It is designed to be transmitted as a LIN communication signal. As a result, the air conditioner ECU 16 which is an external master node can grasp the implementation status of the initialization operation of the motorized valve 9 (during the initializing operation, the end of the initializing operation, the normal operation in which the valve opening degree of the motoric valve can be controlled, etc.). ..

As described above, in the motorized valve control device 11 of the present embodiment, after the initializing operation of the motorized valve 9 is completed, a signal notifying the end of the initializing operation is output, so that the air conditioner ECU 16 grasps the implementation status of the initializing operation, particularly the end of the initializing operation. After the motorized valve control device 11 returns to the normal operation after the initialization operation is completed (for example, immediately after the initialization operation is completed), the valve opening control of the motorized valve 9 can be started, so that the standby period of the air conditioner ECU 16 can be reduced. It is possible to prevent a delay in starting control (opening control) of the motor-operated valve 9.

(Second Embodiment)
Next, the processing flow of the initialization processing by the second embodiment (microcomputer 11b) of the motorized valve control device according to the present invention will be described with reference to FIG. The configuration of the motor-operated valve control device of the second embodiment and the motor-operated valve device including the same is the same as the configuration of the motor-operated valve control device 11 of the first embodiment and the motor-operated valve device 12 provided with the same. The difference from the first embodiment is that the initialization operation is interrupted during the initialization operation. Therefore, in the following, only the differences will be described in detail, and the same configurations as those in the first embodiment will be designated by the same reference numerals and detailed description thereof will be omitted.

That is, the microcomputer 11b monitors the initialization signal bit of the reception buffer register during the initialization operation (after starting the initialization operation in step S24), and the initialization signal bit of the reception buffer register is changed from the air conditioner ECU 16 to 3: initialization interrupted. When the operation instruction which is an instruction is received (step S31: Yes), the initialization operation is interrupted at that point (step S32).

When the microcomputer 11b finishes interrupting the initialization operation, the microcomputer 11b sets the initialization status bit of the transmission buffer register to 3: end of the initialization operation (step S33).

When the air conditioner ECU 16 receives the signal of the end of the initialization operation output from the electric valve control device 11, it transmits an instruction signal for setting the initialization signal bit of the reception buffer register to 0: normal operation to the microcomputer 11b.

Next, when the microcomputer 11b receives an operation instruction from the air conditioner ECU 16 that the initialization signal bit of the receive buffer register is 0: normal operation (step S34: Yes), the microcomputer 11b sets the initialization status bit of the transmission buffer register to 0: normal operation. (Step S35), the electric valve 9 is in the normal operation state, and the opening control of the electric valve 9 is started according to the instruction of the air conditioner ECU 16.

Here, as described above, when the initialization operation is interrupted during the initialization operation, the microcomputer 11b has the current number of pulses (at the current position) of the stepping motor 8 of the motorized valve 9 stored in the EEPROM 11e (or RAM). Correspondence), the valve opening degree of the motorized valve 9 is controlled.

When the initialization signal bit of the reception buffer register does not receive the operation instruction which is 3: initialization interruption instruction from the air conditioner ECU 16 (step S31: No), the processes of steps S25 to S28 described with reference to FIG. 4 are executed.

As described above, in the motorized valve control device 11 of the present embodiment, after the initializing operation of the motorized valve 9 is interrupted, a signal notifying the end of the initializing operation is output, so that the air conditioner ECU 16 grasps the implementation status of the initializing operation, particularly the interruption of the initializing operation. The opening control of the solenoid valve 9 can be started after the motorized valve control device 11 returns to the normal operation after the initialization operation is interrupted (for example, immediately after the initialization operation is interrupted). Therefore, for example, the solenoid valve 9 can be operated during the initializing operation. Even when it becomes necessary to change the opening degree, it is possible to reduce the standby period of the air conditioner ECU 16 and prevent a delay in starting the control (opening degree control) of the electric valve 9.

When the initialization operation is interrupted during the initialization operation, the motor-operated valve 9 is stored in the EEPROM 11e (or RAM) based on the current number of pulses (corresponding to the current position) of the stepping motor 8 of the motor-operated valve 9. Since the valve opening degree is controlled, the valve opening degree of the motorized valve 9 can be precisely controlled even when the initialization operation is interrupted.

In the motorized valve control device 11 of the present embodiment, after the initializing operation of the motorized valve 9 is interrupted, a signal for notifying the end of the initializing operation is output, but instead of a signal for notifying the end of the initializing operation, a signal for notifying the interruption of the initializing operation is output. May be output. That is, a bit for notifying the termination of initialization may be provided in the transmission buffer register separately from the bit for notifying the end of initialization, and may be used properly as a bit for notifying the end of initialization in the first embodiment. For example, if the initialization status bit that notifies the end of the initialization operation is 3: the end of the initialization operation and the initialization status bit that notifies the interruption of the initialization operation is 4: the initialization operation is interrupted, the transmission buffer register is displayed when the initialization operation is terminated without interruption. The initialization status bit of is set to 3: the initialization operation is terminated, and when the initialization operation is interrupted, the initialization status bit of the transmission buffer register may be set to 4: initialization operation interruption.

(Third Embodiment)
Next, the processing flow of the initialization processing by the third embodiment (microcomputer 11b) of the motorized valve control device according to the present invention will be described with reference to FIG. The configuration of the electric valve control device of the third embodiment and the electric valve device provided with the electric valve control device is the same as the configuration of the electric valve control device 11 of the first embodiment and the electric valve device 12 provided with the same. The difference from the first embodiment is that the electric valve control device 11 knows the current position (number of pulses) of the stepping motor 8 so that the rotor reliably collides with the stopper at the current position (number of pulses). This is a point that takes into account the initialization process (initialization operation or second initialization operation) (initial positioning of 0 pulses) that rotates the stepping motor 8 in the valve closing direction by the number of pulses to which a sufficient number of pulses are added. .. Therefore, in the following, only the differences will be described in detail, and the same configurations as those in the first embodiment will be designated by the same reference numerals and detailed description thereof will be omitted.

First, in the microcomputer 11b, when the initialization status bit of the transmission buffer register is 0: normal operation (step S21: Yes), the initialization signal bit of the reception buffer register from the air conditioner ECU 16 is 2: the current number of pulses or more in the valve closing direction. When an operation instruction, which is an initialization operation instruction to be rotated, is received (step S42: Yes), the initialization status bit of the transmission buffer register is set to 2: during the initialization operation of rotating the valve in the valve closing direction by the current number of pulses or more (step S43). The stepping motor 8 is rotated by the current pulse or more in the valve closing direction (step S44).

The number of pulses required for the initialization operation in this case (the number of initialization pulses) is obtained by adding a predetermined number of pulses to the current number of pulses of the stepping motor 8 of the electric valve 9 stored in the EEPROM 11e (or RAM) (for example). , If the current number of pulses is 100 pulses, the predetermined number of pulses is 40 to add 140 pulses, etc.), or it can be calculated by multiplying by a predetermined coefficient.

Here, the method for deriving the number of initialization pulses of the present embodiment will be described with reference to other examples. In the electric valve 9 having a maximum pulse number of 500 pulses, when the current pulse number of the stepping motor 8 of the electric valve 9 stored in the EEPROM 11e (or RAM) is 200 pulses, the stepping motor 8 is rotated in the valve closing direction. The number of initialization pulses is set to 200 pulses or more (for example, 240 pulses obtained by adding 40 pulses to 200 pulses). Further, the number of initialization pulses when the stepping motor 8 is rotated in the valve opening direction is equal to or more than the number of pulses (300 pulses) obtained by subtracting the current number of pulses (200 pulses) from the maximum number of pulses (500 pulses) (for example, 300 pulses). 340 pulses, which is obtained by adding 40 pulses to the predetermined number of pulses).

The motorized valve control device 11 outputs a signal during the initialization operation to the air conditioner ECU 16, and while the air conditioner ECU 16 receives the signal during the initializing operation, the air conditioner ECU 16 interrupts the opening control of the motorized valve 9.

The microcomputer 11b confirms at regular time intervals whether or not the stepping motor 8 has rotated in the valve closing direction by the current number of pulses or more (step S45), and confirms that the stepping motor 8 has rotated in the valve closing direction by the current number of pulses or more. Then (that is, when the initialization operation is completed), the initialization status bit of the transmission buffer register is set to 3: Initialization operation end (step S46).

When the air conditioner ECU 16 receives the initialization operation end signal output from the electric valve control device 11, the electric valve control device 11 transmits an instruction signal for setting the initialization signal bit of the reception buffer register to 0: normal operation to the microcomputer 11b. To do.

Next, when the microcomputer 11b receives an operation instruction from the air conditioner ECU 16 that the initialization signal bit of the receive buffer register is 0: normal operation (step S47: Yes), the microcomputer 11b sets the initialization status bit of the transmission buffer register to 0: normal operation. (Step S48), the electric valve 9 is in the normal operation state, and the opening control of the electric valve 9 is started according to the instruction of the air conditioner ECU 16.

As described above, the motor-operated valve control device 11 of the present embodiment has the same effects as those of the first embodiment, and the current stepping motor 8 of the motor-operated valve 9 stored in the EEPROM 11e (or RAM) is present. Since the solenoid valve 9 is initialized using the number of pulses derived from the number of pulses (corresponding to the current position), the time required for initialization can be shortened.

In the first to third embodiments, the case where the motor-operated valve control device 11 and the motor-operated valve device 12 are applied to the expansion valve 5 (motor valve 9) of the refrigeration cycle system used in the car air conditioner has been illustrated. The present invention is not limited to the expansion valve 5, as long as it is an electric valve including a fluid inlet and outlet, a valve body that controls the flow rate of the fluid flowing out from the outlet, and a motor that drives the valve body. It goes without saying that the motor-operated valve control device 11 and the motor-operated valve device 12 according to the above can be applied. Further, for example, it may be applied to a motor type shut valve that opens and closes the flow path of the refrigerant to flow or shut off the refrigerant, or a flow path switching valve such as a three-way valve or a four-way valve that switches the flow direction of the refrigerant. Is natural.

5 Expansion valve 8 Stepping motor 9 Electric valve 11 Electric valve controller 11a Regulator 11b Microcomputer 11c LIN transceiver 11d Stepping motor driver 11e EEPROM (storage unit)
12 Electric valve device 14 LIN bus 16 Air conditioner ECU

Claims (7)

An electric valve control device that controls the valve opening of an electric valve provided with a valve body and a stepping motor for driving the valve body.
When the signal of the initialization operation interruption instruction is received from the outside during the initialization operation of the solenoid valve, the initialization operation of the solenoid valve is interrupted, the signal of the completion of the initialization operation is transmitted to the outside, and the signal instructing the normal operation is transmitted to the outside. A motor-operated valve control device, characterized in that the motor-operated valve is in a normal operating state when received from, and a signal informing that the motor-operated valve is in a normal operating state is transmitted to the outside. Based on the number of pulses according to the rotation amount of the stepping motor, the valve opening of the motorized valve is controlled within the range of the entire stroke from the fully open position to the fully closed position or from the fully closed position to the fully open position.
It has a storage unit that stores the current number of pulses corresponding to the current valve opening degree of the motorized valve.
In the initialization operation of the electric valve, a predetermined number of pulses equal to or greater than the maximum number of pulses for operating the entire stroke range of the electric valve is rotated in the valve closing direction or the valve opening direction regardless of the current number of pulses. The initialization operation of 1 and the second initialization operation of rotating the number of pulses derived based on the current number of pulses stored in the storage unit in the valve closing direction or the valve opening direction are included.
The second initialization operation is an operation of rotating the number of pulses equal to or greater than the current number of pulses only in the valve closing direction, or opening a valve number equal to or greater than the number of pulses obtained by subtracting the current number of pulses from the maximum number of pulses. The electric valve control device according to claim 1, wherein the operation is to rotate only in a direction. When the initialization operation is completed or the initialization operation is interrupted, the state of the initialization operation completion is written in the transmission buffer register, and when the transmission request signal is received from the outside, the contents written in the transmission buffer register. The motorized valve control device according to claim 1, wherein the motor valve control device is characterized in that During the initialization operation, the state of the initialization operation is written in the transmission buffer register, and when a transmission request signal is received from the outside, the contents written in the transmission buffer register are transmitted to the outside. The motorized valve control device according to claim 3. It has a storage unit that stores the current position of the motorized valve.
When the initialization operation is interrupted during the initialization operation and then a signal instructing the normal operation is received from the outside to enter the normal operation state, the electric motor is based on the current position stored in the storage unit. The electric valve control device according to claim 1, wherein the valve opening degree of the valve is controlled. The motorized valve control device according to any one of claims 1 to 5, wherein the motorized valve control device is connected to the outside by LIN communication or CAN communication. The motor-operated valve device according to any one of claims 1 to 6, wherein the motor-operated valve control device and the motor-operated valve are integrally assembled.

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