TWM506206U - Solenoid pump control system and solenoid pump driving circuit - Google Patents

Abstract

A solenoid pump control system and a solenoid pump driving circuit are disclosed herein. The solenoid pump control system includes a solenoid pump, a pump driving module and a control module. The pump driving module includes a rectifying circuit and a switching circuit and is configured to provide a driving voltage to drive the solenoid pump. The rectifying circuit is configured to convert an AC voltage to output the driving voltage. The switching circuit is configured to switch according to a PWM signal to connect or disconnect the rectifying circuit and the solenoid pump. The control module is configured to output the PWM signal to control the switching circuit.

Description

Reciprocating pump control system and reciprocating pump drive circuit

This creation relates to a reciprocating pump control system, and more particularly to a control system for regulating the pressure and flow of a reciprocating pump.

Recently, Solenoid Pumps have been widely used in various beverage machine devices for pressurizing and transporting water or beverage liquids inside the device to produce and provide beverages for consumer use.

However, the existing reciprocating pump control system is liable to cause the reciprocating pump to vibrate violently during operation, resulting in a large friction loss, resulting in waste of system power usage. Frequently operated reciprocating pumps often have overheating that affects their flow and pressure control. In severe cases, internal components of the system may be damaged, reducing system life and stability.

Therefore, how to design a novel reciprocating pump control system, reduce power consumption and improve the vibration of the reciprocating pump is one of the current important research and development topics, and it is also a goal that needs to be improved in the current related fields.

One aspect of this creation is a reciprocating pump control system. The reciprocating pump control system includes a reciprocating pump, a pump drive module, and a control module. The pump drive module includes a rectifier circuit and a switch circuit for providing a drive voltage to drive the reciprocating pump. The rectifier circuit is used to rectify the alternating voltage to output a driving voltage. The switching circuit modulates the signal according to the pulse width to turn on or off the rectifier circuit. The control module is configured to output a pulse width modulation signal to control the switching circuit.

In an embodiment of the present invention, the pulse width modulation signal is in phase with the alternating voltage.

In an embodiment of the present invention, when the pulse width modulation signal has the first level, the switch circuit turns on the rectifier circuit, and when the pulse width modulation signal has the second level, the switch circuit turns off the rectifier circuit.

In an embodiment of the present invention, the control module includes: a phase detection circuit and a controller. The phase detecting circuit is configured to output a phase synchronization signal that is in phase with the alternating voltage. The controller is configured to output a pulse width modulation signal according to the phase synchronization signal, so that the pulse width modulation signal is in phase with the alternating voltage.

In an embodiment of the present invention, the pump drive module further includes an isolation circuit. The isolation circuit is used to isolate the signal and output a corresponding switch switching signal according to the pulse width modulation signal. The switch circuit is further configured to receive the switch switching signal to turn on or off the rectifier circuit.

In an embodiment of the present invention, the pump driving module further includes a voltage stabilizing circuit. The voltage regulator circuit is used to convert the AC voltage into a DC power source required for the switching circuit.

In an embodiment of the present invention, the control module adjusts the duty cycle of the pulse width modulation signal according to an external command.

In an embodiment of the present invention, the reciprocating pump control system further includes a heater and a heater drive circuit. The heater is connected to a reciprocating pump for heating the liquid. A heater drive circuit is used to drive the heater.

In an embodiment of the present invention, the control module is further configured to output a heating control signal to control the heater driving circuit.

In an embodiment of the present invention, the reciprocating pump control system further includes a water storage tank and a water intake tank. The water storage tank is connected to the reciprocating pump, and the water supply tank is connected to the heater. The reciprocating pump heats the liquid from the water storage tank into the heater according to the driving voltage, so that the heated liquid flows into the water collecting tank.

Another aspect of the creation is a reciprocating pump drive circuit. The reciprocating pump drive circuit includes a rectifier circuit, a switch circuit, and a controller. The rectifier circuit is used to rectify the alternating voltage to output a driving voltage. The switch circuit is electrically connected between the rectifier circuit and the reciprocating pump for switching according to the pulse width modulation signal to turn on or off the rectifier circuit, so that the rectifier circuit drives the reciprocating pump according to the driving voltage when conducting. The controller is electrically connected to the switch circuit for outputting a pulse width modulation signal to control the switch circuit.

In an embodiment of the present invention, when the pulse width modulation signal has the first level, the switch circuit turns on the rectifier circuit, and when the pulse width modulation signal has the second level, the switch circuit turns off the rectifier circuit.

In an embodiment of the present invention, the reciprocating pump drive circuit further includes a power module. The power module is electrically connected to the rectifier circuit and the controller to provide an AC voltage.

In an embodiment of the present invention, the reciprocating pump drive circuit further includes a phase detection circuit. The phase detecting circuit is electrically connected to the power module and the controller for outputting a phase synchronization signal in phase with the alternating voltage. The controller is further configured to output a pulse width modulation signal according to the phase synchronization signal, so that the pulse width modulation signal is in phase with the alternating voltage.

In an embodiment of the present invention, the power module further includes a power conversion circuit. The power conversion circuit is electrically connected to the controller to provide the DC power required by the controller.

In an embodiment of the present invention, the reciprocating pump drive circuit further includes an isolation circuit. The isolation circuit is electrically connected between the controller and the switch circuit for isolating the signal and outputting a corresponding switch switching signal according to the pulse width modulation signal. The switch circuit is further configured to receive the switch switching signal to turn on or off the rectifier circuit.

In an embodiment of the present invention, the reciprocating pump drive circuit further includes a voltage stabilizing circuit. The voltage stabilizing circuit is electrically connected to the rectifying circuit and the switching circuit for converting the alternating current voltage into a direct current power source required for the switching circuit.

In an embodiment of the present invention, the controller further adjusts the duty ratio of the pulse width modulation signal according to an external command to control the driving voltage.

By applying the above embodiment, the present invention uses a switching circuit to switch according to a pulse width modulation signal to control the driving voltage of the reciprocating pump, and can effectively adjust the output pressure and flow value of the reciprocating pump, and improve the reciprocating pump in the prior art. The absence of a control system provides a more energy efficient and reliable reciprocating pump control system for beverage machine use.

The following is a detailed description of the embodiments in order to provide a better understanding of the scope of the present invention, but the embodiments are not intended to limit the scope of the disclosure, and the description of the structural operation is not used. Limiting the order in which they are performed, any device that has been re-combined by components, resulting in equal functionality, is covered by this disclosure. In addition, according to industry standards and practices, the drawings are only for the purpose of assisting the description, and are not drawn according to the original size. In fact, the dimensions of the various features may be arbitrarily increased or decreased for convenience of explanation. In the following description, the same elements will be denoted by the same reference numerals for explanation.

The terms used in the entire specification and the scope of the patent application, unless otherwise specified, generally have the ordinary meaning of each term used in the field, the content disclosed herein, and the particular content. Certain terms used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in the description of the disclosure.

As used herein, "about", "about" or "substantially" generally means that the error or range of the index value is within 20%, preferably within 10%, and more preferably It is within 5 percent. In the text, unless otherwise stated, the numerical values referred to are regarded as approximations, such as an error or range indicated by "about", "about" or "substantial", or other approximations.

In addition, the terms "including", "including", "having", "containing", and the like, as used herein, are all open terms, meaning "including but not limited to". Further, "and/or" as used herein includes any one or combination of one or more of the associated listed items.

As used herein, when an element is referred to as "connected" or "coupled", it may mean "electrically connected" or "electrically coupled". "Connected" or "coupled" can also be used to indicate that two or more components operate or interact with each other. In addition, although the terms "first", "second", and the like are used herein to describe different elements, the terms are used only to distinguish the elements or operations described in the same technical terms. Unless the context clearly dictates otherwise, the term is not specifically intended or implied in the order or order, and is not intended to limit the present invention.

Please refer to Figure 1. 1 is a schematic diagram of a reciprocating pump drive circuit 100 using a Triode for Alternating Current (TRIAC). The reciprocating pump drive circuit 100 includes an AC power source 120, a controller 140, a three-terminal bidirectional steerable element 160, and a reciprocating pump 180. The controller 140 is electrically connected to the AC power source 120, the triac and the reciprocating pump 180, and triggers the output control signal CS1 according to the phase of the AC voltage Vac output by the AC power source 120. The three-terminal bidirectional controllable element 160 is switched to switch the turn-on and turn-off of the triac 160 to adjust the magnitude of the driving voltage Vload for driving the reciprocating pump 180.

Please refer to Figure 2 together. FIG. 2 is a schematic diagram showing the waveforms of the driving voltage Vload and the control signal CS1 according to the reciprocating pump driving circuit 100 in FIG. As shown in FIG. 2, the controller 140 delays the AC voltage Vac after a positive zero-crossing point (ie, the driving voltage Vload changes from a negative level to a positive level in FIG. 2). After the phase angle, the control signal CS1 is output, and the three-terminal bidirectional controllable element 160 is triggered, so that the AC power source 120 and the reciprocating pump 180 are turned on to provide the driving voltage Vload (at the solid line in FIG. 2) to drive the reciprocating pump 180.

In this way, when the controller 140 delays the triggering time Td after the AC voltage Vac passes the positive zero crossing point (ie, the delay phase angle is small), the driving voltage Vload drives the energy of the reciprocating pump 180 in a complete cycle. (As shown in the area of the line drawn in Figure 2), the larger. In contrast, when the controller 140 delays the triggering time Td after the AC voltage Vac passes the positive zero crossing point (ie, the delay phase angle is large), the driving voltage Vload drives the energy of the reciprocating pump 180 in a complete cycle. The smaller. As shown in Fig. 2, as the delay trigger time Td is gradually increased, the energy for driving the reciprocating pump 180 is gradually lowered. In other words, the controller 140 can adjust the energy of driving the reciprocating pump 180 by controlling the delay trigger time Td to achieve the function of adjusting the flow rate and the pressure value of the reciprocating pump 180.

However, in the driving circuits shown in FIGS. 1 and 2, since the control of the driving voltage Vload is triggered by the delay of the triac 120, the reciprocating pump 180 directly withstands each time it is turned on. The continuous high voltage, and with the difference of the delay triggering time Td, the initial voltage value at each turn-on is also different, causing the reciprocating pump 180 to vibrate violently, and it is easy to generate a large friction loss. In addition, the delay trigger control mode easily causes the drive voltage Vload to have more harmonic components, which further increases the system power consumption.

In order to solve the above problems, the present invention proposes a reciprocating pump control system 300. Please refer to Figure 3. FIG. 3 is a schematic diagram of a reciprocating pump control system 300 in accordance with an embodiment of the present invention. In the present embodiment, the reciprocating pump control system 300 includes a power module 310, a control module 320, a pump driving module 330, and a reciprocating pump 340. The power module 310 is electrically connected to the control module 320 and the pump driving module 330 for providing the AC voltage Vac required by the reciprocating pump control system 300. The control module 320 is configured to output a pulse width modulation signal CS2 to control the pump driving module 330. The pump drive module 330 is configured to provide a drive voltage Vdrive to drive the reciprocating pump 340. The detailed operational principles of control module 320 and pump drive module 330 are described in detail in subsequent paragraphs.

In some embodiments, as shown in FIG. 3, the reciprocating pump control system 300 further includes a heater drive circuit 350, a heater 370, a water storage tank 360, a water intake 380, and an operation interface 390.

Structurally, the reciprocating pump 340 is coupled to the sump 360, the heater 370 is coupled to the reciprocating pump 340, and the sump 380 is coupled to the heater 370. The flow of liquid in the reciprocating pump control system 300 is indicated by the arrows in Fig. 3. First, the reciprocating pump 340 drives the liquid from the water storage tank 360 into the heater 370 according to the driving voltage Vdrive. Next, after the heater 370 heats the liquid, the heated liquid flows into the water intake tank 380 for the user to access.

In this embodiment, the control module 320 is further configured to output a heating control signal CS3 to control the heater driving circuit 350. The heater driving circuit 350 is configured to drive the heater 370 according to the heating signal Vheat to appropriately adjust the heating degree of the heater 370 according to different requirements.

The operation interface 390 is configured to provide a user input external command CMD to the control module 320, so that the control module 320 can control the pump drive module 330 and/or the heater drive circuit 350 according to the external command CMD. In this way, the pressure and flow rate required for the reciprocating pump 340 and the temperature required for heating by the heater 370 can be adjusted according to different needs to make a beverage desired by the user.

In the present embodiment, the power module 310, the control module 320, the pump drive module 330, the heater drive circuit 350, and the operation interface 390 together constitute a reciprocating pump drive circuit 400 in the reciprocating pump control system 300. The water storage tank 360, the reciprocating pump 340, the heater 370, and the water intake 380 together form a water circuit in the reciprocating pump control system 300.

The following paragraphs will be described with respect to the detailed operational principles of the portion of the reciprocating pump drive circuit 400 in the reciprocating pump control system 300. Please refer to Figure 4. FIG. 4 is a schematic diagram of a reciprocating pump drive circuit 400 according to an embodiment of the present invention. As shown in FIG. 4, the reciprocating pump drive circuit 400 includes a power module 310, a control module 320, and a pump drive module 330.

In this embodiment, the power module 310 includes an AC power source 312 and a power conversion circuit 314. The AC power source 312 is configured to provide an AC voltage Vac to the control module 320, the pump driver module 330, and the power conversion circuit 314. The power conversion circuit 314 is electrically connected to the controller 324 in the control module 320 for converting the received AC voltage Vac into a DC voltage having an appropriate voltage level to provide the DC power required by the controller 324. Vcc1. In particular, power conversion circuit 314 can be implemented by various rectifier circuits.

The control module 320 includes a phase detection circuit 322 and a controller 324. Structurally, the phase detecting circuit 322 is electrically connected to the AC power source 312 and the controller 324. The phase detecting circuit 322 is configured to detect the AC voltage Vac and output a phase synchronization signal Vsync in phase with the AC voltage Vac. The specific circuit structure of the phase detecting circuit 322 will be described in detail in the subsequent paragraphs.

The controller 324 is electrically connected to the switch circuit 334, and outputs the pulse width modulation signal CS2 according to the phase synchronization signal Vsync, so that the pulse width modulation signal CS2 is in phase with the AC voltage Vac. In this embodiment, the controller 324 can be implemented by a microcontroller (Microcontroller Unit), or can be a Complex Programmable Logic Device (CPLD) or a Field-programmable Gate Array. FPGA) and other different ways to implement.

The pump drive module 330 includes a rectifier circuit 336 and a switch circuit 334. The rectifying circuit 336 is configured to rectify the received AC voltage Vac to output a driving voltage Vdrive to the reciprocating pump 340. The switch circuit 334 is electrically connected between the rectifier circuit 336 and the reciprocating pump 340, and is switched according to the pulse width modulation signal CS2 to turn on or off the rectifier circuit 336 and the reciprocating pump 340.

Refer to Figure 5 for the corresponding operation of the drive voltage Vdrive and the pulse width modulation signal CS2. FIG. 5 is a schematic diagram showing the waveforms of the driving voltage Vdrive and the pulse width modulation signal CS2 according to an embodiment of the present invention. For convenience of description, the switch circuit 334 switches according to the pulse width modulation signal CS2 to turn on or off the rectifier circuit 336 and the reciprocating pump 340, so that the rectifier circuit 336 outputs the driving voltage Vdrive to the reciprocating pump 340. The description is made in conjunction with the embodiment shown in FIG. 4, but the present creation is not limited thereto.

As shown in FIG. 4 and FIG. 5, when the pulse width modulation signal CS2 has a first level (eg, a high level), the switch circuit 334 turns on the rectifying circuit 336 and the reciprocating pump 340 when the pulse width is modulated. When the signal CS2 has a second level (e.g., low level), the switch circuit 334 turns off the rectifier circuit 336 and the reciprocating pump 340.

In this way, the controller 324 can use the Pulse Width Modulation (PWM) control to adjust the duty ratio (Ton) of the pulse width modulation signal CS2 to change the duty ratio, thereby controlling the driving. The voltage Vdrive and the energy of the reciprocating pump 340 are driven (as indicated by the area of the line drawn in Fig. 5) to achieve the function of adjusting the flow rate and pressure value of the reciprocating pump 340. When the on-time Ton of the pulse width modulation signal CS2 is longer, the larger the energy for driving the reciprocating pump 340 in one full cycle, the larger the flow rate and the pressure value of the reciprocating pump 340. In contrast, when the on-time Ton of the pulse width modulation signal CS2 is shorter, the smaller the energy for driving the reciprocating pump 340 in one full cycle, the smaller the flow rate and the pressure value of the reciprocating pump 340.

Specifically, the controller 324 can adjust the duty ratio of the pulse width modulation signal CS2 according to the external command CMD input by the user through the operation interface 390 to control the driving voltage Vdrive.

It should be noted that in the present embodiment, since the pulse width modulation signal CS2 is in phase with the AC voltage Vac, the switching circuit 334 turns on the rectifying circuit 336 and the reciprocating circuit at the positive zero crossing point of the AC voltage Vac in each cycle. The pump 340 causes the drive voltage Vdrive to rise gradually from zero.

Since the reciprocating pump drive circuit 400 in the present embodiment realizes the soft start of the zero voltage switching, high voltage and large current are not generated to flow into the reciprocating pump 340 at the instant of conduction, thereby avoiding The frictional loss caused by the violent vibration of the reciprocating pump 340 improves the overheating problem of the reciprocating pump 340 under frequent operation. In addition, the driving voltage Vdrive waveform that achieves zero voltage switching in this embodiment has less harmonic components than the waveform of the driving voltage Vload in FIG. 2, further reducing power loss and improving system conversion efficiency. .

In some embodiments, the pump drive module 330 in the reciprocating pump drive circuit 400 further includes an isolation circuit 332. The isolation circuit 332 is electrically connected between the controller 324 and the switch circuit 334 for isolating the signal and outputting a corresponding switch switching signal Vswitch according to the pulse width modulation signal CS2. The switch circuit 334 receives the switch switching signal Vswitch to turn on or off the rectifier circuit 336 and the reciprocating pump 340. Specifically, in the present embodiment, the isolation circuit 332 can be implemented by using an optocoupler element, but the present invention is not limited thereto.

In this way, the isolation circuit 332 can properly isolate the circuit signal between the control module 320 and the pump drive module 330 to avoid abnormal operation of the reciprocating pump drive circuit 400 caused by signal interference between the front and rear stage circuits, and improve operation. Stability.

In some embodiments, the pump drive module 330 in the reciprocating pump drive circuit 400 further includes a voltage stabilization circuit 338. The voltage stabilizing circuit 338 is electrically connected to the rectifying circuit 336 and the switching circuit 334 for regulating the rectified signal output by the rectifying circuit 336 to provide the DC power supply Vcc2 required by the switching circuit 334.

Please refer to Figure 6A. FIG. 6A is a specific circuit diagram of the phase detecting circuit 322 according to an embodiment of the present invention. In this embodiment, the phase detecting circuit 322 includes a diode DS1, a diode DS2, a capacitor CS, and resistors RS1 to RS5.

The first end of the resistor RS1 is electrically connected to the input end of the phase detecting circuit 322 for receiving the AC voltage Vac. The second end of the resistor RS1 is electrically connected to the first end of the diode DS1 (ie, the positive terminal) and the second end of the diode DS2 (ie, the negative terminal). The second end of the diode DS1 (ie, the negative terminal) is electrically connected to the DC power source VCC. The first end of the diode DS2 (ie, the positive terminal) is electrically connected to the ground.

The first ends of the capacitors CS and the resistors RS2 are electrically connected to the second ends of the resistors RS1, respectively, and the second ends of the capacitors CS and the resistors RS2 are electrically connected to the ground terminals. The resistors RS3 to RS5 are electrically connected to each other in series. The first end of the resistor RS3 is electrically connected to the second end of the resistor RS1, and the second end of the resistor RS5 is electrically connected to the ground. The second end of the resistor RS4 is electrically connected to the output end of the phase detecting circuit 322 for outputting the phase synchronization signal Vsync.

For the relationship between the AC voltage Vac and the phase synchronization signal Vsync, please refer to FIG. 6B. FIG. 6B is a waveform diagram of the alternating voltage Vac and the phase synchronization signal Vsync according to an embodiment of the present invention. For the sake of convenience and clarity of description, FIG. 6B is a description of the embodiment shown in FIG. 6A, but is not limited thereto, and any person skilled in the art can, without departing from the spirit and scope of the present disclosure, Make a variety of changes and retouching.

As shown in FIG. 6A and FIG. 6B, the AC voltage Vac is stepped down by the capacitor CS and the resistor RS2, and is divided by the resistors RS3 to RS5, and the AC voltage Vac can be stepped down and outputted in phase with the AC voltage Vac. Phase synchronization signal Vsync. By selecting an appropriate resistance component, the voltage level of the AC voltage Vac (eg, 110 volts or 220 volts) can be adjusted to a voltage level suitable for the phase synchronization signal Vsync provided to the controller 324 (eg, about 5 volts). ). In addition, the arrangement of the diodes DS1 and DS2 can protect the phase detecting circuit 322 to prevent the phase detecting circuit 322 from damaging the component due to the abnormal glitch signal in the AC voltage Vac.

In this way, the phase detecting circuit 322 can output the phase synchronization signal Vsync having the square wave characteristic as shown in FIG. 6B, wherein the positive edge of the square wave corresponds to the positive zero crossing point of the alternating voltage Vac, and the negative edge of the square wave Corresponds to the negative zero crossing point of the AC voltage Vac. The controller 324 can receive the phase synchronization signal Vsync to know the phase of the AC voltage Vac.

Please refer to Figure 7. FIG. 7 is a specific circuit diagram of the pump driving module 330 according to an embodiment of the present invention.

In the present embodiment, the isolation circuit 332 includes a resistor R1, a switch Q1, and an optical coupler U1. The resistor R1 is electrically connected to the DC power source VCC. The optical coupler U1 is electrically connected to the resistor R1. The switch Q1 is electrically connected to the optical coupler U1. The control terminal of the switch Q1 is used to selectively turn on the circuit according to the pulse width modulation signal CS2. When the pulse width modulation signal CS2 has a first level (eg, a high level), the circuit is turned on so that the current signal drives the light emitting diode in the photocoupler U1, and causes the photocoupler U1 to turn on the pump driving module 330. The circuit on the side outputs a corresponding switch switching signal Vswitch to achieve signal isolation between the control module 320 and the pump driving module 330. It should be noted that, in order to avoid mutual interference of the signals, the pump driving module 330 and the control module 320 respectively have different grounding ends on both sides of the isolation circuit 332.

Switch circuit 334 includes switch Q2 and resistor R4. The control terminals of the resistor R4 and the switch Q2 are electrically connected to the optical coupler U1. The switch Q2 receives the switch switching signal Vswitch according to the operation of the photocoupler U1, selectively turns on or off the rectifying circuit 336 and the reciprocating pump 340 to control the driving voltage Vdrive of the input reciprocating pump 340.

In this embodiment, the rectifier circuit 336 includes a bridge rectifier circuit composed of a diode D2, a resistor R3, a capacitor C2, and diodes D3 to D6. The positive terminal of the diode D2 is electrically connected to the first end of the switch Q2, and the negative terminal of the diode D2 is electrically connected to the first end of the resistor R3. The second end of the resistor R3 is electrically connected to the first end of the capacitor C2. The second end of the capacitor C2 is electrically connected to the ground end of the pump driving module 330 side. The diodes D3 to D6 constitute a bridge rectifier circuit. The negative terminal of the diode D3 and the negative terminal of the diode D4 are electrically connected to the positive terminal of the diode D2. The negative terminal of the diode D5 and the negative terminal of the diode D6 are electrically connected to the positive terminal of the diode D3 and the positive terminal of the diode D4, respectively. The positive terminal of the diode D5 and the positive terminal of the diode D6 are electrically connected to the ground terminal of the pump driving module 330 side. The positive terminal of the diode D4 is further configured to receive the AC voltage Vac, and the negative terminal of the diode D5 is further electrically connected to the reciprocating pump 340 to provide the driving voltage Vdrive.

The AC voltage Vac is rectified by the mutual operation of the above components. When the switch Q2 is turned on, the rectified signal output from the rectifying circuit 336 can be input as the driving voltage Vdrive and used as the energy for driving the reciprocating pump 340 via the circuits of the diodes D3 to D6. In contrast, when the switch Q2 is turned off, the value of the driving voltage Vdrive input to the reciprocating pump 340 is zero.

The voltage stabilizing circuit 338 is composed of a voltage stabilizing diode D1, a capacitor C1, and a resistor R2. The first end of the voltage stabilizing diode D1, the first end of the capacitor C1, and the first end of the resistor R2 are electrically connected to the optical coupler U1. The second end of the voltage stabilizing diode D1 and the second end of the capacitor C1 are electrically connected to the ground end of the pump driving module 330 side. The second end of the resistor R2 is electrically connected to the rectifier circuit 336. The voltage stabilizing circuit 338 regulates the rectified signal outputted by the rectifying circuit 336 through the corresponding operation of the above-mentioned components by the operation characteristics of the capacitor-resistor circuit and the voltage stabilizing diode to provide the switching circuit 334 required for switching the switch Q2. DC power supply.

It should be noted that in the embodiment, the rectifier circuit 336 can also be implemented by other types of half-wave rectifier circuits or full-wave rectifier circuits. In addition, the switch Q1 can be implemented by a bipolar junction transistor (BJT), and the switch Q2 can be implemented by a Metal Oxide Semiconductor Field-Effect Transistor (MOSFET), however, FIG. The illustrated embodiments are merely examples and are not intended to limit the present invention. Anyone who is familiar with this skill can make various changes and refinements without departing from the spirit and scope of this creation.

Please refer to Figures 8A and 8B. FIG. 8A is a diagram showing the relationship between the driving current and the output pressure of the reciprocating pump according to an embodiment of the present invention. The horizontal axis is the magnitude of the driving current, and the vertical axis is the output pressure. L1 is the characteristic curve of the driving current of the reciprocating pump using the reciprocating pump control system 300 and the reciprocating pump driving circuit 400 in one embodiment of the present invention. L2 is the characteristic curve of the driving current of the reciprocating pump control system to the output pressure of the reciprocating pump in the current practice.

FIG. 8B is a diagram showing the relationship between the drive current and the output flow rate of the reciprocating pump according to an embodiment of the present invention. The horizontal axis is the magnitude of the driving current, and the vertical axis is the output flow value. L3 is the driving current output of the reciprocating pump using the reciprocating pump control system 300 and the reciprocating pump driving circuit 400 in the present embodiment. Characteristic curve, L4 is the characteristic curve of the drive current of the reciprocating pump control system to the output flow value of the reciprocating pump in the current practice.

As shown in Fig. 8A and Fig. 8B, under the same power supply conditions, the control system of the present driving circuit is used, and the reciprocating pump control system of the present invention is under the same driving current as compared with the current practice. Provides higher output pressure and greater output flow. In addition, the reciprocating pump control system of the present invention requires only a small driving current and power consumption under the condition of outputting the same pressure and flow rate. In other words, compared with the current practice, the driving circuit and the control system of the present invention can improve the friction loss caused by the violent vibration of the reciprocating pump, and more efficiently and efficiently extract and pressurize the liquid.

For example, in an embodiment of the present invention, when the drive current is about 325 milliamperes (mA), the inventive control system can provide a pressure of about 12.2 bar, which is only comparable to the current practice. The pressure of 10.7 Bar can increase the output pressure by about 14.0%. In addition, with the same drive current of approximately 325 milliamperes (mA), the proposed control system can provide a flow rate of approximately 410 cubic centimeters per minute (CPM), which is only approximately 380 compared to current practice. The flow rate of cubic centimeters per minute can increase the output flow by about 7.9%.

On the other hand, when the pressure of about 10.7 bar is also provided, the control system of the present invention only needs a driving current of about 302 milliamperes (mA), which requires about 325 milliamperes (mA) of driving compared to the current method. Current saves about 7.1% power consumption. When the same capacity of about 380 cubic centimeters per minute is also provided, the control system of the present invention requires only about 312 milliamperes (mA) of drive current, which saves about 325 milliamperes (mA) of drive current compared to current practice. About 4.0% of power consumption.

In summary, the present application uses the above-mentioned embodiment to switch the pulse width modulation signal according to the pulse width modulation signal to control the driving voltage of the reciprocating pump, thereby effectively adjusting the output pressure and flow rate of the reciprocating pump, and improving the existing The lack of a reciprocating pump control system in the technology provides a more energy efficient and reliable reciprocating pump control system for beverage machine applications.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this Creative Content is subject to the definition of the scope of the patent application.

100‧‧‧Reciprocating pump drive circuit
120‧‧‧AC power supply
140‧‧‧ Controller
160‧‧‧Triacs
180‧‧‧Reciprocating pump
300‧‧‧Reciprocating pump control system
310‧‧‧Power Module
312‧‧‧AC power supply
314‧‧‧Power conversion circuit
320‧‧‧Control Module
322‧‧‧ phase detection circuit
324‧‧‧ Controller
330‧‧‧ pump drive module
332‧‧‧Isolation circuit
334‧‧‧Switch circuit
336‧‧‧Rectifier circuit
338‧‧‧ Voltage regulator circuit
340‧‧‧Reciprocating pump
350‧‧‧heater drive circuit
360‧‧ ‧ water storage tank
370‧‧‧heater
380‧‧‧Sink
390‧‧‧Operator interface
400‧‧‧Reciprocating pump drive circuit
CS, C1, C2‧‧‧ capacitor
D1‧‧‧ Regulators
DS1, DS2, D2~D6‧‧‧ diode
Q1, Q2‧‧‧ switch
R1～R4, RS1～RS5‧‧‧ resistance
U1‧‧‧Optocoupler
CS1‧‧‧ control signal
CS2‧‧‧ pulse width modulation signal
CS3‧‧‧heat control signal
CMD‧‧‧ External Instructions
Td‧‧‧ Delay trigger time
Ton‧‧‧ On time
Vac‧‧‧AC voltage
VCC, Vcc1, Vcc2‧‧‧ DC power supply
Vheat‧‧‧heating signal
Vload, Vdrive‧‧‧ drive voltage
Vswitch‧‧‧ switch switching signal
L1～L4‧‧‧ characteristic curve

1 is a schematic diagram of a reciprocating pump driving circuit; FIG. 2 is a schematic diagram showing waveforms of a driving voltage and a control signal according to the driving circuit in FIG. 1; FIG. 3 is a diagram showing an embodiment according to the present invention. FIG. 4 is a schematic diagram of a reciprocating pump driving circuit according to an embodiment of the present invention; FIG. 5 is a driving voltage and a pulse width according to an embodiment of the present invention. FIG. 6A is a specific circuit diagram of a phase detecting circuit according to an embodiment of the present invention; FIG. 6B is a diagram showing an alternating voltage and phase synchronization signal according to an embodiment of the present invention; FIG. 7 is a specific circuit diagram of a pump driving module according to an embodiment of the present invention; FIG. 8A is a diagram showing relationship between driving current and output pressure of a reciprocating pump according to an embodiment of the present invention; And FIG. 8B is a diagram showing the relationship between the driving current and the output flow value of the reciprocating pump according to an embodiment of the present invention.

300‧‧‧Reciprocating pump control system

310‧‧‧Power Module

320‧‧‧Control Module

330‧‧‧ pump drive module

340‧‧‧Reciprocating pump

350‧‧‧heater drive circuit

360‧‧ ‧ water storage tank

370‧‧‧heater

380‧‧‧Sink

390‧‧‧Operator interface

400‧‧‧Reciprocating pump drive circuit

CS2‧‧‧ pulse width modulation signal

CS3‧‧‧heat control signal

CMD‧‧‧ External Instructions

Vac‧‧‧AC voltage

Vheat‧‧‧heating signal

Vdrive‧‧‧ drive voltage

Claims (18)

A reciprocating pump control system comprising: a reciprocating pump; a pump driving module for providing a driving voltage to drive the reciprocating pump, the pump driving module comprising: a rectifying circuit for rectifying an alternating current voltage And outputting the driving voltage; and a switching circuit, the switching circuit turns on or off the rectifying circuit according to a pulse width modulation signal; and a control module is configured to output the pulse width modulation signal to control the switching circuit. The reciprocating pump control system of claim 1, wherein the pulse width modulation signal is in phase with the alternating voltage. The reciprocating pump control system of claim 1, wherein when the pulse width modulation signal has a first level, the switch circuit turns on the rectifier circuit, and when the pulse width modulation signal has a second level The switch circuit turns off the rectifier circuit. The reciprocating pump control system of claim 1, wherein the control module comprises: a phase detecting circuit for outputting a phase synchronization signal in phase with the alternating voltage; and a controller for determining the phase according to the phase The sync signal outputs the pulse width modulation signal such that the pulse width modulation signal is in phase with the alternating voltage. The reciprocating pump control system of claim 1, wherein the pump driving module further comprises: an isolating circuit for isolating the signal and outputting a corresponding switching signal according to the pulse width modulation signal; wherein the switching circuit The method further receives the switch switching signal to turn on or off the rectifier circuit. The reciprocating pump control system of claim 1, wherein the pump driving module further comprises: a voltage stabilizing circuit that converts the alternating current voltage into a direct current power source required by the switching circuit. The reciprocating pump control system of claim 1, wherein the control module adjusts a duty cycle of the pulse width modulation signal according to an external command. The reciprocating pump control system of claim 1, further comprising: a heater coupled to the reciprocating pump for heating the liquid; and a heater drive circuit for driving the heater. The reciprocating pump control system of claim 8, wherein the control module is further configured to output a heating control signal to control the heater driving circuit. The reciprocating pump control system of claim 8, further comprising: a water storage tank connected to the reciprocating pump; and a water receiving tank connected to the heater; wherein the reciprocating pump directs the liquid according to the driving voltage The water storage tank is driven into the heater to heat, so that the heated liquid flows into the water supply tank. A reciprocating pump driving circuit comprising: a rectifying circuit for rectifying an alternating voltage to output a driving voltage; a switching circuit electrically connected between the rectifying circuit and the reciprocating pump, the switching circuit is based on The pulse width modulation signal is switched to turn on or off the rectifier circuit, so that the rectifier circuit drives the reciprocating pump according to the driving voltage when being turned on; and a controller electrically connected to the switching circuit for outputting the A pulse width modulation signal is used to control the switching circuit. The reciprocating pump drive circuit of claim 11, wherein when the pulse width modulation signal has a first level, the switch circuit turns on the rectifier circuit, and when the pulse width modulation signal has a second level The switch circuit turns off the rectifier circuit. The reciprocating pump driving circuit of claim 11, further comprising: a power module electrically connected to the rectifier circuit and the controller for providing the alternating voltage. The reciprocating pump driving circuit of claim 13, further comprising: a phase detecting circuit electrically connected to the power module and the controller for outputting a phase synchronization signal in phase with the alternating voltage; The controller is further configured to output the pulse width modulation signal according to the phase synchronization signal, so that the pulse width modulation signal is in phase with the alternating voltage. The reciprocating pump drive circuit of claim 13, wherein the power supply module further comprises: a power conversion circuit electrically connected to the controller for providing a DC power supply required by the controller. The reciprocating pump drive circuit of claim 11, further comprising: an isolation circuit electrically connected between the controller and the switch circuit for isolating the signal and outputting a corresponding one according to the pulse width modulation signal The switching signal is further configured to receive the switching signal to turn on or off the rectifier circuit. The reciprocating pump driving circuit of claim 11, further comprising: a voltage stabilizing circuit electrically connected to the rectifying circuit and the switching circuit for converting the alternating current voltage into a direct current power source required by the switching circuit. The reciprocating pump drive circuit of claim 11, wherein the controller further adjusts a duty ratio of the pulse width modulation signal according to an external command to control the driving voltage.