Control device for greenhouse side thermal insulation tubular motor

Abstract

The utility model discloses a control device for greenhouse side heat preservation tubular motors, which comprises driving circuits, tubular motors arranged on one side of a greenhouse are respectively connected with one driving circuit, all the driving circuits are connected with an alternating current power supply through a power switch, all the driving circuits are connected with a control circuit, and the control circuit is connected with the greenhouse side heat preservation tubular motors. A remote automatic control port of the control circuit is connected with an automatic control box through a signal acquisition circuit, a local manual control port of the control circuit is connected with a manual control panel, and an indicating lamp circuit is connected between the control circuit and the manual control panel. The device effectively controls the greenhouse side thermal insulation tubular motor, has the advantages of small loss, difficulty in damage, small size, flexibility in arrangement, low manufacturing and maintenance cost and the like, and is suitable for popularization.

Description

Technical Field

[0001] The utility model relates to a control device for a tubular motor for side heat preservation of a greenhouse, belonging to the technical field of motor control equipment. Background Art

[0002] At present, most greenhouses are mainly multi-span glass greenhouses. There are many types of control methods for greenhouses according to different classifications, such as ventilation control, temperature regulation, etc., and also internal shading control, internal heat preservation control, side heat preservation control, etc. Among them, the side heat preservation control method has been widely adopted because of its flexible layout and small occupation of greenhouse space. The side heat preservation control method mainly sets a tubular motor on one side of the greenhouse, and the tubular motor drives the heat preservation curtain to realize the unfolding and folding actions, so as to play a role in timely shielding and heat preservation for the greenhouse.

[0003] However, it can be found from actual implementation that in daily use, according to factors such as morning and evening time and light intensity, the tubular motor needs to be frequently started to drive the heat preservation curtain to be frequently unfolded and folded. Obviously, this puts forward higher requirements for the control device used to control the operation of the tubular motor. The traditional control device for the side heat preservation control method mainly includes a PLC circuit, and the PLC circuit is mainly composed of large hardware devices such as contactors, intermediate relays, and thermal relays. Obviously, such hardware devices have great losses when frequently controlling the tubular motor, and the frequent actions are likely to damage the contacts and have a short service life. In addition, such hardware devices are large in volume, not convenient for flexible layout, greatly affect the lighting effect in the greenhouse, and have high device costs, high maintenance costs and long maintenance cycles. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a control device for a tubular motor for side heat preservation of a greenhouse, which has the advantages of small loss, not easy to be damaged, small volume, flexible layout, low manufacturing and maintenance costs, etc. in addition to effectively controlling the tubular motor for side heat preservation of the greenhouse, and is suitable for popularization.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A control device for a tubular motor for side heat preservation of a greenhouse, including a drive circuit. Each tubular motor arranged on one side of the greenhouse is respectively connected to one of the drive circuits. All the drive circuits are connected to an AC power supply via a power switch. Each drive circuit is connected to a control circuit. The remote automatic control port of the control circuit is connected to an automatic control box via a signal acquisition circuit. The local manual control port of the control circuit is connected to a manual control panel. Among them, an indicator light circuit is connected between the control circuit and the manual control panel.

[0007] The advantages of the utility model are:

[0008] When the utility model implements side heat preservation control for the greenhouse, it can effectively control the tubular motor. Moreover, since the utility model replaces large hardware devices such as contactors, intermediate relays, and thermal relays of the traditional control device with micro-components such as thyristors, triodes, and integrated chips, the utility model has the advantages of small loss, not easily damaged by frequent actions, sensitive control, long service life, small volume, convenient for flexible layout, little influence on the lighting effect in the greenhouse, and low manufacturing and maintenance costs and short cycle. Brief Description of the Drawings

[0009] Figure 1 is a block diagram of the control device for the tubular motor for side heat preservation of the greenhouse of the utility model.

[0010] Figure 2 is a schematic connection diagram of the drive circuit and its connection with the AC power supply and the tubular motor.

[0011] Figure 3 is a schematic diagram of the power conversion circuit.

[0012] Figure 4 is a schematic connection diagram of the control circuit and its connection with the automatic control box and the manual control panel (the manual control panel, the signal acquisition circuit, etc. are partially shown).

[0013] Figure 5 is a schematic circuit diagram of the MCU circuit.

[0014] Figure 6 is a partial schematic circuit diagram of the indicator light circuit.

[0015] Figure 7 is a schematic circuit diagram of the active signal acquisition module of the signal acquisition circuit.

[0016] Figure 8 is a schematic circuit diagram of the passive signal acquisition module of the signal acquisition circuit. Detailed Implementation Manner

[0017] As Figures 1 to 8 shown, the utility model provides a control device for the tubular motor for side heat preservation of the greenhouse, which includes a drive circuit 20. Each tubular motor 90 arranged on one side of the greenhouse is respectively connected to a drive circuit 20. All drive circuits 20 are connected to the AC power supply 10 via a power switch K1. Each drive circuit 20 is connected to a control circuit 30. The remote automatic control port of the control circuit 30 is connected to the automatic control box 80 via a signal acquisition circuit 50. The local manual control port of the control circuit 30 is connected to the manual control panel 60. Among them, an indicator light circuit 40 is connected between the indicator light signal port of the control circuit 30 and the corresponding signal port of the manual control panel 60.

[0018] Refer toFigure 2 , the drive circuit 20 includes a forward rotation control thyristor and a reverse rotation control thyristor. The cathodes of the forward rotation control thyristor and the reverse rotation control thyristor are connected to the forward rotation signal terminal and the reverse rotation signal terminal of the corresponding tubular motor 90. The anodes of the forward rotation control thyristor and the reverse rotation control thyristor converge and are connected to one end of the AC power supply 10 (as the live wire) through a motor power switch and a power switch K1. The neutral port of the tubular motor 90 is connected to the other end of the AC power supply 10 (as the neutral wire) via the power switch K1. The gates of the forward rotation control thyristor and the reverse rotation control thyristor are connected to the control circuit 30, where: a fuse is connected to each of the anodes of the forward rotation control thyristor and the reverse rotation control thyristor; the power switch K1 is a three-pole single-throw switch.

[0019] Figure 2 Taking a tubular motor 90 as an example, the composition of the drive circuit 20 is shown. As Figure 2 , the drive circuit 20 includes a forward rotation control thyristor T1 and a reverse rotation control thyristor T2. The cathodes of the forward rotation control thyristor T1 and the reverse rotation control thyristor T2 are connected to the forward rotation signal terminal and the reverse rotation signal terminal of the tubular motor 90. The anodes of the forward rotation control thyristor T1 and the reverse rotation control thyristor T2 converge and are connected to one end of the AC power supply 10 through a motor power switch K2 and a power switch K1. The neutral port of the tubular motor 90 is connected to the other end of the AC power supply 10 via the power switch K1. The gates of the forward rotation control thyristor T1 and the reverse rotation control thyristor T2 are connected to the control circuit 30. Additionally, as Figure 2 , a fuse F1 is connected to the anode of the forward rotation control thyristor T1, and a fuse F2 is connected to the anode of the reverse rotation control thyristor T2. A fuse is also called a current protector. The fuses F1 and F2 are used to provide an overload protection function of 15A. The forward and reverse rotations of the tubular motor 90 are realized by controlling the thyristors T1 and T2, and the control signals are given by the control circuit 30 according to the corresponding working conditions and operation instructions.

[0020] Here, the composition of other drive circuits 20 is the same as that of the above drive circuit 20, and the input ends of each drive circuit 20 are commonly connected to the output end of the power switch K1. In the present invention, each tubular motor 90 is independently controlled, and the control states are motor forward rotation, motor reverse rotation, and stop. Each tubular motor 90 needs to be grounded, and in addition, the drive circuit 20 needs to be grounded conventionally.

[0021] In the present invention, the AC power supply 10 is a 220V AC power supply.

[0022] As Figure 4, the control circuit 30 includes an MCU circuit 31. The MCU circuit 31 is connected to a signal acquisition circuit 50, a manual control panel 60, and an indicator light circuit 40. The MCU circuit 31 is connected to the gates of the forward rotation control thyristors and the reverse rotation control thyristors of each drive circuit 20 via a triode drive circuit 32, where: The MCU circuit 31 includes an MCU (Micro Control Unit) chip.

[0023] In actual design, the triode drive circuit 32 includes multiple triode circuits. The gates of the forward rotation control thyristors and the reverse rotation control thyristors are respectively connected to a triode circuit and are controlled by the triode circuit. The triode circuit includes a triode. Since the triode drive circuit 32 is a common circuit, its specific composition will not be elaborated here.

[0024] Such as Figure 5 , the MCU circuit 31 designs an MCU chip U15. The corresponding pins of the MCU chip U15 are connected to the corresponding pins of each triode in the triode drive circuit 32. The MCU chip U15 outputs control signals to each triode according to control requirements to control the forward rotation control thyristors and the reverse rotation control thyristors through the triodes, thereby realizing the operation control of the tubular motor 90. The chip U16 is used to provide a DC 3.3V analog voltage for the MCU chip U15. Here, Figure 5 Multiple pins for debugging are set, such as the pins of the MCU chip U15 connected by R92 - R97.

[0025] Refer to Figure 1 and Figure 4 to understand that the signal acquisition circuit 50 includes an active signal acquisition module and a passive signal acquisition module. Each active signal acquisition module and each passive signal acquisition module are respectively connected to the corresponding pins of the MCU chip. The active signal acquisition module includes an active signal acquisition circuit composed of a reference voltage comparator, a triode, a zener diode, resistors, and capacitors. The passive signal acquisition module includes a passive signal acquisition circuit composed of an optocoupler, a triode, a zener diode, resistors, and capacitors, where: If the automatic control box 80 outputs an active control signal, each active control signal output terminal of the automatic control box 80 is respectively connected to a corresponding active signal acquisition module; if the automatic control box 80 outputs a passive control signal, each passive control signal output terminal of the automatic control box 80 is respectively connected to a corresponding passive signal acquisition module. Figure 4 Only a passive signal acquisition module 51 is schematically shown.

[0026] The following takes the greenhouse configured with 3 tubular motors 90 as an example for illustration.

[0027] For three tubular motors 90, if they are controlled remotely by an automatic control box 80 that outputs an active control signal, then each active control signal output terminal of the automatic control box 80 is respectively connected to a corresponding active signal acquisition module. Figure 7 Six active control signals, that is, six active signal acquisition modules, are designed for three tubular motors 90 to control the forward and reverse rotation of each tubular motor 90. For example, one of the active signal acquisition modules includes an active signal acquisition circuit composed of a reference voltage comparator U7 (CJ431), a triode Q13, a zener diode ZD13, multiple resistors, and multiple capacitors.

[0028] In Figure 7 CN1's ACOM is the active signal common terminal, AK1A is the forward rotation signal terminal of motor 1, AK1B is the reverse rotation signal terminal of motor 1, AK2A is the forward rotation signal terminal of motor 2, AK2B is the reverse rotation signal terminal of motor 2, AK3A is the forward rotation signal terminal of motor 3, and AK3B is the reverse rotation signal terminal of motor 3.

[0029] Refer to Figure 7 The active control signal (AC 24V) is first converted into a DC voltage signal through diode rectification, then sampled by resistor voltage division. The sampled signal is compared with the reference voltage of the reference voltage comparator (CJ431). Subsequently, the reference voltage comparator outputs a corresponding level signal, and after level inversion by the triode, it can output a corresponding level signal to the MCU chip through an optocoupler (not shown in the figure).

[0030] Similarly, for three tubular motors 90, if they are controlled remotely by an automatic control box 80 that outputs a passive control signal, then each passive control signal output terminal of the automatic control box 80 is respectively connected to a corresponding passive signal acquisition module. Figure 8 Six passive control signals, that is, six passive signal acquisition modules, are designed for three tubular motors 90 to control the forward and reverse rotation of each tubular motor 90. For example, one of the passive signal acquisition modules includes a passive signal acquisition circuit composed of an optocoupler U1 (EL357), a triode Q1, a zener diode ZD1, multiple resistors, and multiple capacitors.

[0031] In Figure 8 Pin OP K1A is the output of the forward rotation signal of motor 1, OP K1B is the output of the reverse rotation signal of motor 1, OPK2A is the output of the forward rotation signal of motor 2, OP K2B is the output of the reverse rotation signal of motor 2, OP K3A is the output of the forward rotation signal of motor 3, and OPK3B is the output of the reverse rotation signal of motor 3.

[0032] Refer to Figure 8, the passive signal acquisition circuit realizes the electrical isolation between the passive control signal and the MCU chip, that is, an optocoupler is used to collect the remote control signal. When the passive control signal is a closing instruction, the current flowing through the input-side diode of the optocoupler is 0, so the output-side triode is cut off, and a high-level signal is output to the MCU chip to drive the motor to rotate forward. When the passive control signal is an opening instruction, the current flowing through the input-side diode of the optocoupler is not 0, and the diode drives the output-side triode to trigger conduction, so a low-level signal is output to the MCU chip to drive the motor to rotate in reverse.

[0033] In the present utility model, the automatic control box 80 is an existing device in the art, mainly used for remotely controlling the operation of devices such as motors, for example, using the connext controller of PRIVA Company in the Netherlands.

[0034] In the present utility model, the manual control panel 60 can adopt an existing control panel in the art. Generally, the manual control panel 60 includes a plurality of button circuits, where: the button circuit includes a protection resistor and a button connected in series, one end of the protection resistor is connected to the panel power supply and the indicator light circuit 40, the other end of the protection resistor is connected to one end of the button and the corresponding pin of the MCU chip, and the other end of the button is grounded;

[0035] The indicator light circuit 40 includes a plurality of indicator sub-circuits, each button circuit is connected to a corresponding indicator sub-circuit, where: the indicator sub-circuit includes an indicator light resistor, an indicator light, and an indicator light control triode connected in series, and after being connected in series, the indicator light resistor, the indicator light, and the indicator light control triode are connected between the panel power supply and the corresponding pin of the MCU chip.

[0036] Figure 4 Only one button circuit 61 is schematically shown. This button circuit 61 includes a protection resistor R an and a button SB connected in series. One end of the protection resistor R an is connected to the DC 5V panel power supply and the indicator light circuit 40, the other end of the protection resistor R an is connected to one end of the button SB and the corresponding pin of the MCU chip U15, and the other end of the button SB is grounded.

[0037] As Figure 4 , the figure schematically shows the indicator sub-circuit 41 connected to this button circuit 61, including an indicator light resistor R zs , an indicator light L zs and an indicator light control triode T zs , and after the three are connected in series, they are connected between the DC 5V panel power supply and the corresponding pin of the MCU chip U15. Among them, generally, the collector of the indicator light control triode T zs is connected to the indicator light L zs, the base is connected to the corresponding pin of the MCU chip U15 and the emitter is grounded. Further referring to Figure 6 , Figure 6 shows the specific structure of an indication sub - circuit (the indicator lamp is not shown).

[0038] As Figure 1 , the output end of the power switch K1 is also connected with a power conversion circuit 70, and the power conversion circuit 70 is used to convert the AC voltage of the AC power supply 10 to supply power to each circuit.

[0039] As Figure 3 , the power conversion circuit 70 includes an AC - to - DC isolation power module M1, a DC conversion isolation power module M2, a first DC conversion non - isolation power module M3 and a second DC conversion non - isolation power module M4, where: the input side of the AC - to - DC isolation power module M1 is connected to the output end of the power switch K1; the output side of the AC - to - DC isolation power module M1 is divided into two paths. One path is connected to the input side of the DC conversion isolation power module M2, and the DC conversion isolation power module M2 is used to isolate the DC 24V voltage (DC24V1) output by the AC - to - DC isolation power module M1 and provide the DC 24V voltage (DC24V2) to the signal acquisition circuit 50. The other path is connected to the input side of the second DC conversion non - isolation power module M4 via the first DC conversion non - isolation power module M3. The first DC conversion non - isolation power module M3 is used to provide the DC 5V voltage (DC5V) to the signal acquisition circuit 50 and the indicator lamp circuit 40, and the second DC conversion non - isolation power module M4 is used to provide the DC 3.3V voltage (DC3.3V) to the control circuit 30.

[0040] In actual application, a fuse F3 is connected to the input side of the AC - to - DC isolation power module M1. In the present utility model, the above design of the power conversion circuit 70 well realizes the two - by - two electrical isolation between the external AC power supply 10, the external control signal and the MCU chip signal, greatly reducing the possibility of mutual interference.

[0041] In the present utility model, the tubular motor 90 is a single - phase motor, which is a commonly used motor in occasions such as greenhouses and will not be elaborated here.

[0042] The tubular motor 90 in the present utility model is designed with two control modes: local and remote.

[0043] The local control mode realizes the control of the running state of the tubular motor 90 by operating the buttons on the manual control panel 60. The local control mode is usually used in situations such as on - site debugging. The remote control mode controls the forward rotation, reverse rotation and stop of the tubular motor 90 by the automatic control box 80 sending out digital quantity signals (active or passive control signals).

[0044] In practice, for the manual control panel 60, each tubular motor can be configured with 3 buttons, namely forward rotation (unfolding the thermal insulation curtain), reverse rotation (folding up the thermal insulation curtain), and remote / local switching.

[0045] During operation, the MCU chip scans the status of each button on the manual control panel 60 in real time. Among them, according to the button status, it determines whether it is in the remote or local control mode. In the remote control mode, the MCU chip reads the remote digital input signals sent by the automatic control box 80 in real time to parse them into corresponding control commands to control the forward and reverse actions of the corresponding motor. In the local control mode, the MCU chip scans the status of the corresponding button in real time, determines the corresponding control command according to the status, and then controls the forward and reverse actions of the corresponding motor.

[0046] In practice, the button can adopt a single - click flip working mode, that is, each time the button is pressed, the current state is switched to the opposite state, and continuous pressing is not supported.

[0047] Take Figure 4 For example, when operating the manual control panel 60, when a certain button SB (not the remote / local switching button) is pressed, the MCU chip U15 detects a change in the digital input signal (from high to low). After confirming the action of the button SB, it lights up the corresponding indicator light L zs At the same time, according to the action of the button SB, it drives the on - off of the corresponding triode in the triode drive circuit 32 to control the actions of the forward - rotation control thyristor T1 and the reverse - rotation control thyristor T2 in the drive circuit 20, and then controls the forward and reverse states of the tubular motor 90. When switching from the local to the remote control mode by operating the manual control panel 60, the MCU chip U15 starts to collect the remote digital input signals (active or passive control signals) sent by the automatic control box 80. Thus, the MCU chip U15 controls the actions of the forward - rotation control thyristor T1 and the reverse - rotation control thyristor T2 in the drive circuit 20 through the triode drive circuit 32 according to the received control signals, so as to automatically control the forward and reverse states of the tubular motor 90.

[0048] The advantages of the present utility model are as follows:

[0049] When the present utility model implements side thermal insulation control for the greenhouse, it can effectively control the tubular motor. And because the present utility model replaces large - scale hardware devices such as contactors, intermediate relays, and thermal relays in the traditional control device with micro - components such as thyristors (also known as silicon - controlled rectifiers), triodes, and integrated chips, the present utility model has the advantages of small loss, not easily damaged during frequent operation, sensitive control, long service life, small volume, convenient for flexible layout, little influence on the lighting effect in the greenhouse, and low manufacturing and maintenance costs and short cycle.

[0050] The utility model avoids the damage of tubular motors caused by the failures of large hardware devices such as contactors. If a tubular motor fails, it can be directly replaced, greatly reducing the impact of the failure on the normal use of the greenhouse. In addition, the utility model has high versatility and can be applied to various types of automatic control boxes (active or passive signals) in greenhouses.

[0051] The above is the preferred embodiment of the utility model and the technical principles applied. For those skilled in the art, any obvious changes such as equivalent transformations and simple substitutions based on the technical solution of the utility model without departing from the spirit and scope of the utility model shall fall within the protection scope of the utility model.

Claims

1. A control device for a greenhouse side heat preservation tubular motor, characterized in that, It includes a drive circuit. Each tubular motor installed on one side of the greenhouse is respectively connected to one of the drive circuits. All the drive circuits are connected to an AC power supply via a power switch. Each drive circuit is connected to a control circuit. The remote automatic control port of the control circuit is connected to an automatic control box via a signal acquisition circuit. The local manual control port of the control circuit is connected to a manual control panel. Among them, an indicator light circuit is connected between the control circuit and the manual control panel.

2. The control device for the greenhouse side heat preservation tubular motor according to claim 1, characterized in that, The drive circuit includes a forward rotation control thyristor and a reverse rotation control thyristor. The cathode of the forward rotation control thyristor and the cathode of the reverse rotation control thyristor are connected to the forward rotation signal terminal and the reverse rotation signal terminal of the corresponding tubular motor respectively. The anodes of the forward rotation control thyristor and the reverse rotation control thyristor are converged and then connected to one end of the AC power supply through a motor power switch and the power switch. The neutral line port of the tubular motor is connected to the other end of the AC power supply via the power switch. The gates of the forward rotation control thyristor and the reverse rotation control thyristor are connected to the control circuit. Among them: a fuse is connected to the anode of each of the forward rotation control thyristor and the reverse rotation control thyristor; the power switch is a three-pole single-throw switch.

3. The control device for the greenhouse side heat preservation tubular motor according to claim 2, characterized in that, The control circuit includes an MCU circuit. The MCU circuit is connected to the signal acquisition circuit, the manual control panel and the indicator light circuit. The MCU circuit is connected to the gates of the forward rotation control thyristor and the reverse rotation control thyristor of each drive circuit via a triode drive circuit. Among them: the MCU circuit includes an MCU chip.

4. The control device for the greenhouse side heat preservation tubular motor according to claim 3, characterized in that, The signal acquisition circuit includes an active signal acquisition module and a passive signal acquisition module. Each active signal acquisition module and each passive signal acquisition module are respectively connected to the corresponding pins of the MCU chip. The active signal acquisition module includes an active signal acquisition circuit composed of a reference voltage comparator, a triode, a zener diode, resistors and capacitors. The passive signal acquisition module includes a passive signal acquisition circuit composed of an optocoupler, a triode, a zener diode, resistors and capacitors. Among them: if the automatic control box outputs an active control signal, each active control signal output terminal of the automatic control box is respectively connected to a corresponding active signal acquisition module; if the automatic control box outputs a passive control signal, each passive control signal output terminal of the automatic control box is respectively connected to a corresponding passive signal acquisition module.

5. The control device for the greenhouse side heat preservation tubular motor according to claim 4, characterized in that, The manual control panel includes a plurality of button circuits. Among them: the button circuit includes a protection resistor and a button connected in series. One end of the protection resistor is connected to the panel power supply and the indicator light circuit. The other end of the protection resistor is connected to one end of the button and the MCU chip. The other end of the button is grounded; The indicator light circuit includes a plurality of indicator sub - circuits, and each of the button circuits is connected to a corresponding indicator sub - circuit, where: the indicator sub - circuit includes an indicator light resistor, an indicator light, and an indicator light control triode connected in series, and after the indicator light resistor, the indicator light, and the indicator light control triode are connected in series, they are connected between the panel power supply and the MCU chip.

6. The control device for the greenhouse side heat preservation tubular motor according to any one of claims 1 to 5, characterized in that, The output end of the power switch is further connected with a power conversion circuit, and the power conversion circuit is used to convert the AC voltage of the AC power supply to supply power to each circuit.

7. The control device for the greenhouse side heat preservation tubular motor according to claim 6, characterized in that, The power conversion circuit includes an AC - to - DC isolation power supply module, a DC conversion isolation power supply module, a first DC conversion non - isolation power supply module, and a second DC conversion non - isolation power supply module, where: the input side of the AC - to - DC isolation power supply module is connected to the output end of the power switch; the output side of the AC - to - DC isolation power supply module is divided into two paths, one path is connected to the input side of the DC conversion isolation power supply module, and the DC conversion isolation power supply module is used to isolate the DC 24V voltage output by the AC - to - DC isolation power supply module and provide the DC 24V voltage to the signal acquisition circuit, and the other path is connected to the input side of the second DC conversion non - isolation power supply module via the first DC conversion non - isolation power supply module. The first DC conversion non - isolation power supply module is used to provide the DC 5V voltage to the signal acquisition circuit and the indicator light circuit, and the second DC conversion non - isolation power supply module is used to provide the DC 3.3V voltage to the control circuit.

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