Segmented on-off forward and reverse control method of electromagnetic diaphragm pump and electromagnetic diaphragm pump
By optimizing the forward and reverse timing logic of the electromagnetic diaphragm pump through a segmented on/off forward and reverse control method, the problems of coil heating, narrow flow regulation and high noise were solved, achieving low temperature operation, wide flow regulation and high resistance medium adaptability, and extending the pump body life.
Patent Information
- Application Number
- CN202511550682.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-01-23
AI Technical Summary
The forward and reverse control logic of existing electromagnetic diaphragm pumps leads to problems such as severe coil overheating, narrow flow adjustment range, high noise, and poor adaptability to high-resistance media.
The segmented on/off forward and reverse control method is adopted. Through the three-stage control process of forward start-intermittent-recharge and reverse start-intermittent-recharge, the forward and reverse timing logic is optimized. Inertia and power-off period are used for heat dissipation, reducing current surges and achieving fine flow regulation and stable delivery.
It reduces coil temperature, expands the flow regulation range, reduces mechanical and electromagnetic noise, improves adaptability to high-resistance media, extends pump life, and reduces energy consumption.
Smart Images
Figure CN121382601A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electromagnetic diaphragm pumps, in particular to a segmented on-off forward and reverse control method of an electromagnetic diaphragm pump and an electromagnetic diaphragm pump. BACKGROUND
[0002] The existing electromagnetic diaphragm pump adopts a symmetric on-off logic of "forward power-on T1 + reverse power-on T1" for forward and reverse control, and the on-off logic is as shown in Figure 1 , that is, the coil is continuously powered on T1 in the forward and reverse stages, and the coil power-on duty cycle is close to 100% in the whole cycle. The logic has the following technical pain points: 1. Serious coil heating: continuous power-on leads to accumulation of Joule heat, continuous high temperature of the coil, accelerated aging of the insulation layer and demagnetization of the permanent magnet, and short service life of the pump body; 2. Narrow flow regulation range: only the flow can be controlled by changing the forward and reverse cycle (adjusting the T1 time length), the heating is intensified at high frequency regulation, the flow pulsation is obvious at low frequency regulation, and the demand for micro-flow or high-resistance medium conveying cannot be met; 3. Large mechanical impact and noise: the current is reversed instantaneously when switching between forward and reverse, the electromagnetic force changes suddenly, strong impact is generated on the connecting rod and the diaphragm, mechanical wear is intensified, and large electromagnetic noise is generated, which is not suitable for low-noise scenes; 4. Poor adaptability to high-resistance media: the uniform electromagnetic force generated by continuous power-on is easily offset by high-resistance media, resulting in diaphragm jamming and serious flow decay. SUMMARY
[0003] In view of the deficiencies in the above background art, the present application provides a segmented on-off forward and reverse control method of an electromagnetic diaphragm pump and an electromagnetic diaphragm pump, which solves the technical problems of serious coil heating, narrow flow regulation range, large noise and poor adaptability to high-resistance media caused by the existing electromagnetic diaphragm pump adopting a symmetric on-off logic of "forward power-on T1 + reverse power-on T1".
[0004] The technical scheme of the present application is implemented as follows: a segmented on-off forward and reverse control method of an electromagnetic diaphragm pump, the control method comprising the following steps: step 1: forward starting segment, controlling a driving circuit to pass a forward current to an electromagnet coil of the electromagnetic diaphragm pump for a duration T1, in this stage, an electromagnetic force is established by the forward current to overcome the initial resistance of the medium and push the air bag to move in a forward direction; step 2: forward intermittent segment, cutting off the current of the electromagnet coil for a duration T2, using inertia to make the air bag continue to complete the forward stroke, and at the same time, cutting off the current and naturally cooling the coil; step 3: forward energy supplement segment, passing a forward current to the electromagnet coil again through the driving circuit for a duration T3 to supplement the forward electromagnetic force and ensure that the air bag moves in the forward direction to the right position; step 4: reverse starting segment, controlling the driving circuit to switch the current direction and passing a reverse current to the electromagnet coil for a duration T4 to establish a reverse electromagnetic force and pull the air bag to move in a reverse direction; step 5: reverse intermittent segment, cutting off the current of the electromagnet coil for a duration T5, using inertia to make the air bag continue to complete the reverse stroke, and at the same time, cutting off the current and naturally cooling the coil; step 6: reverse energy supplement segment, passing a reverse current to the electromagnet coil again for a duration T6 to supplement the reverse electromagnetic force and ensure that the air bag moves in the reverse direction to the right position; and step 7: cyclic execution, periodically repeating steps 1 to 6 to make the electromagnetic diaphragm pump continuously perform “forward three-segment type-reverse three-segment type” circulation to realize continuous and one-way delivery of the medium.The segmented on-off forward and reverse control method of the electromagnetic diaphragm pump optimizes the forward and reverse timing logic, constructs a three-segment control process of "start-intermittent-energy supplement" in the forward direction and a three-segment control process of "start-intermittent-energy supplement" in the reverse direction, and the conventional logic can only adjust the flow by "changing the forward and reverse cycle" (the shorter the cycle, the higher the frequency, and the greater the flow), the adjustment range is narrow, and the heat is easily intensified due to the high frequency. In the logic of the present application, fine flow control can be achieved through the three-segment control process to widen the range of flow adjustment. The forward intermittent segment and the reverse intermittent segment use inertia to make the air bag continue to complete the stroke, and the coil is synchronized with heat dissipation when the electromagnetic coil current is cut off, avoiding the accumulation of heat caused by continuous power supply and maintaining a low-temperature operating state. The forward energy supplement segment and the reverse energy supplement segment supplement the electromagnetic force to offset the inertia decay, ensure the air bag stroke, reduce the jamming phenomenon when high-resistance media (including dust and viscous liquid) are transported, improve the flow stability, and can adapt to high-resistance media. When the conventional logic switches between forward and reverse, the coil current is reversed instantaneously, and the electromagnetic force changes from "maximum forward value" to "maximum reverse value", which has a great impact on the connecting rod and the air bag. At the same time, the sudden change in current produces "electromagnetic noise". The improved logic of the present application provides a buffer for forward and reverse switching in the forward intermittent segment and the reverse intermittent segment, the electromagnetic force is gradually established, the impact force is reduced, the mechanical wear is reduced, the noise is reduced, and it is suitable for low-noise environments. The present application realizes the multiple effects of "low heat, wide flow adjustment, low impact noise, and high resistance adaptation", and solves the technical problems of existing electromagnetic diaphragm pumps using "forward power supply T1 + reverse power supply T1" symmetric on-off logic, which causes serious coil heating, narrow flow adjustment range, high noise, and poor adaptability to high-resistance media.
[0005] Among them, the forward intermittent segment is set in the forward phase, and the reverse intermittent segment is set in the reverse phase, so that the pump body is in a power-off zero power consumption mode in the non-driven state. Compared with the conventional 'continuous power supply or high-frequency on-off' control logic, the invalid power consumption is reduced, and the overall energy consumption is significantly reduced.
[0006] The specific analysis of the low-impact noise design of the present application is as follows: The timing essence of the existing diaphragm pump is that the forward 100% current is directly switched to the reverse 100% current, the current direction and intensity suddenly change, the magnetic field oscillates violently, and the electromagnetic noise peak is high. This also leads to the main noise types of existing electromagnetic diaphragm pumps, including: a. Electromagnetic noise: derived from the current change of the electromagnetic coil. When the coil current is suddenly turned on or off, raised or reversed, it will cause the magnetic field to fluctuate violently, producing electromagnetic radiation noise (similar to the "buzzing sound" when a relay is attracted).
[0007] b. Mechanical noise: Impact from the movement of the air bag. The air bag expands / contracts under the drive of current. If it directly hits the end point (maximum stroke) of the pump cavity at "full speed", it will have a hard impact with the components, producing "thud" or vibration noise.
[0008] In combination with the "start → intermittent → energy supplement" timing designed in this application (and consistent reverse parameters), both electromagnetic noise and mechanical noise will be targeted to be suppressed. The specific analysis is as follows: 1) Electromagnetic noise reduction: from "segmented power-on instead of direct on-off" The essence of the timing of this application is to split "traditional 100% continuous power-on" into "start (short power-on) → intermittent (power-off) → energy supplement (short power-on)". This design naturally reduces current mutation, thereby suppressing electromagnetic noise. As a comparison, the existing timing is directly switched from forward 100% current to reverse 100% current. The direction and intensity of the current instantaneously mutate, the magnetic field shakes violently, and the electromagnetic noise peaks.
[0009] Timing design of this application: a) Start segment: Current gradually increases from 0 to target value (even if not deliberately stepped, short time power-on is smoother than "instantaneous full power" mutation), reducing electromagnetic radiation during start-up; b) Intermittent segment: Current is temporarily cut off, rather than continuously maintained at full power, avoiding the coil being in a high magnetic field state for a long time, and reducing continuous electromagnetic noise; c) Energy supplement segment: Only a small amount of current is supplemented (maintaining the air bag stroke, not driving it to accelerate), the current change amplitude is small, and there is no obvious mutation; Forward and reverse switching: Because there is an intermittent segment in the forward direction, the current is already in a "low intensity or power-off state" before switching to the reverse direction, rather than the traditional "forward full power directly to reverse full power". The amplitude of the current mutation during switching is greatly reduced, and the electromagnetic noise is naturally reduced.
[0010] 2) Mechanical noise reduction: Timing design of this application: a) Start segment: Power-on drives the air bag to start moving (accelerate); b) Intermittent segment (key): After power-off, the air bag loses driving force and its speed gradually decreases (rather than continuously accelerating), and even temporarily stops, avoiding hitting the maximum stroke at "full speed"; c) Energy supplement segment: Only a small amount of energy is supplemented to maintain the current stroke of the air bag, rather than continuing to accelerate, further controlling the movement speed of the air bag.
[0011] As a comparison, the existing timing design is to continuously power-on the coil at full power, and the air bag continuously expands / contracts at maximum speed until it hits the end point (maximum stroke) of the pump body, forming a "hard impact", which produces a large mechanical noise.
[0012] In summary, the design of the "intermittent section" in the timing design of the present application directly regulates the air bag speed, avoiding the "full-speed hard impact" in traditional control, which reduces mechanical noise. In addition, the "forward three-stage-reverse three-stage" timing of the present application naturally reduces the mutation frequency and amplitude of the current (such as the current change of the start / energy supplement is more gentle than the traditional "instant full power", and there is no direct full power mutation in forward and reverse switching), which objectively also suppresses electromagnetic noise, reduces electromagnetic noise, and achieves the purpose of low impact noise from mechanical noise and electromagnetic noise.
[0013] Preferably, the forward starting section and the forward energy supplement section have the same current intensity of the forward current. This design can avoid the current mutation when the two stages are connected, reduce the electromagnetic noise caused thereby, and make the air bag force stable during the starting expansion and energy supplement maintenance, cooperate with the buffering of the forward intermittent section, avoid the mechanical impact noise caused by the sudden change of the air bag speed, and match the symmetric parameters of the reverse stage, further reduce the vibration noise.
[0014] Preferably, the reverse starting section and the reverse energy supplement section have the same current intensity of the reverse current. The current intensity of the reverse current in the reverse starting section and the reverse energy supplement section is the same, which can avoid the current mutation when the two stages are connected, reduce the electromagnetic noise caused thereby, and make the air bag force stable during the starting expansion and energy supplement maintenance, cooperate with the buffering of the reverse intermittent section, avoid the mechanical impact noise caused by the sudden change of the air bag speed, and match the symmetric parameters of the forward stage, further reduce the vibration noise.
[0015] Preferably, the duration T1 of the forward starting section and the duration T4 of the reverse starting section are the same. The duration T1 of the forward starting section and the duration T4 of the reverse starting section are the same to ensure that the electromagnetic force of the forward starting section and the reverse starting section is the same on the basis of the same forward current and reverse current, which is beneficial to realize the symmetric on-off logic of the electromagnetic diaphragm pump "forward power T1 + reverse power T4", and further ensure that the speed change of the forward stroke and the speed change of the reverse stroke are symmetrical, avoid additional vibration caused by the uneven speed of the forward and reverse directions, and further reduce the mechanical noise.
[0016] Preferably, the duration T2 of the forward intermittent section and the duration T5 of the reverse intermittent section are the same. The design of the forward intermittent section and the reverse intermittent section makes the pump body in the power-off zero power consumption mode in the non-driven state, which reduces the invalid power consumption compared with the traditional 'continuous power-on or high-frequency on-off' control logic, and significantly reduces the overall energy consumption. The duration T2 of the forward intermittent section and the duration T5 of the reverse intermittent section are the same to ensure that the electromagnetic force in the forward intermittent section and the reverse intermittent section is the same on the basis of the same forward current and reverse current, which is conducive to realizing the symmetric on-off logic of the electromagnetic diaphragm pump 'forward intermittent section T2 + reverse intermittent section T5'. The design of the forward intermittent section and the reverse intermittent section is to ensure that the air bag loses driving force after power-off, and the speed gradually decreases (rather than continuously accelerates), or even temporarily stops, avoiding impact at maximum stroke at 'full speed'.
[0017] Preferably, the duration T3 of the forward energy supplement section and the duration T6 of the reverse energy supplement section are the same. The duration T3 of the forward energy supplement section and the duration T6 of the reverse energy supplement section are the same to ensure that the electromagnetic force in the forward energy supplement section and the reverse energy supplement section is the same on the basis of the same forward current and reverse current, which is conducive to realizing the symmetric on-off logic of the electromagnetic diaphragm pump 'forward energy supplement section T3 + reverse energy supplement section T6', and further ensuring that the speed change of the forward stroke and the speed change of the reverse stroke are symmetrical, avoiding additional vibration caused by uneven forward and reverse speed, and further reducing mechanical noise.
[0018] Preferably, the driving circuit is an H-bridge circuit. The advantage of the H-bridge circuit is that it can quickly switch the current direction, which is conducive to quickly realizing the switching of the forward phase and the reverse phase of the electromagnetic diaphragm pump.
[0019] Preferably, the electromagnetic diaphragm pump adopts the above-mentioned segmented on-off forward and reverse control method. In the electromagnetic diaphragm pump controlled by the above-mentioned segmented on-off forward and reverse control method, the forward phase and the reverse phase of the electromagnetic diaphragm pump are both provided with a three-section time sequence of'start power-on section-power-off intermittent section-energy supplement power-on section', and the current on-off and the time length of each section are precisely controlled to realize stable medium conveying.
[0020] The coil power-on proportion of the U-shaped electromagnet in the electromagnetic diaphragm pump is reduced from 100% of the conventional logic to (T1+T3) / (T1+T2+T3), the Joule heat is greatly reduced, the temperature of the coil on the U-shaped electromagnet is controlled in a reasonable temperature range, the service life of the insulation layer is prolonged, and the overall service life of the electromagnetic diaphragm pump body is prolonged.
[0021] Preferably, the electromagnetic diaphragm pump comprises a pump body, an inlet, an outlet, an air bag and a driving circuit are arranged on the pump body, a diaphragm is arranged in the pump body and cooperates with the inlet and the outlet, a cavity is formed between the air bag and the diaphragm, a power assembly is arranged in the pump body and connected with the air bag, and the power assembly is used to drive the air bag to deform or move, so as to adjust the volume of the cavity. In the electromagnetic diaphragm pump controlled by the segmented on-off forward and reverse control method, the power assembly is driven to move by the segmented on-off forward and reverse control method, and the air bag is driven to deform or move by the segmented on-off forward and reverse control method, so as to adjust the volume of the cavity.
[0022] One end of the diaphragm forms the inlet one-way valve with the inlet of the pump body, and the other end of the diaphragm forms the outlet one-way valve with the outlet of the pump body. When the one end of the diaphragm opens the inlet of the pump body, the other end of the diaphragm is pressed to block the outlet of the pump body. When the one end of the diaphragm is pressed to block the inlet of the pump body, the other end of the diaphragm opens the outlet of the pump body.
[0023] Preferably, the power assembly comprises a permanent magnet arranged on the air bag, a U-shaped electromagnet arranged on the pump body and a connecting rod, the connecting rod is arranged in the pump body in a position-adjustable manner, the permanent magnet is fixed to one end of the connecting rod, the other end of the connecting rod is rotationally connected with the pump body, the air bag is connected to the middle part of the connecting rod, and the U-shaped electromagnet is arranged in a spaced manner with the permanent magnet. The U-shaped electromagnet is used to control the reciprocating movement of the permanent magnet, so as to drive the air bag to deform or move, thereby adjusting the volume of the cavity. The permanent magnet is fixed to one end (power end) of the connecting rod, the other end (the end away from the permanent magnet) of the connecting rod is rotationally connected with the pump body through a shaft structure (forming a swing pivot point), and the middle part of the connecting rod is fixedly connected with the center of the air bag. When the U-shaped electromagnet is electrified to generate an attractive force, the permanent magnet drives the connecting rod to swing upward around the shaft joint end of the pump body. The middle part of the connecting rod pulls the air bag to move upward through the fixed connection with the center of the air bag, so that the volume of the air bag is increased to realize suction. When the U-shaped electromagnet generates a repulsive force (or relies on a reset force), the permanent magnet drives the connecting rod to swing downward around the shaft joint end, so as to push the air bag to move downward, so that the volume of the air bag is reduced to realize discharge. Through the reciprocating swing of the connecting rod around the shaft joint end of the pump body, the force of the permanent magnet is converted into the up-down movement of the center of the air bag, so as to complete the cycle of suction and discharge.
[0024] The application has the following beneficial effects: the segmented on-off forward and reverse control method of the electromagnetic diaphragm pump optimizes the forward and reverse timing logic, constructs a three-segment control process of "start-intermittent-energy compensation" in the forward direction and a three-segment control process of "start-intermittent-energy compensation" in the reverse direction, and the conventional logic can only adjust the flow by "changing the forward and reverse cycle" (the shorter the cycle, the higher the frequency, and the greater the flow), the adjustment range is narrow, and the heat is easily intensified due to the excessively high frequency, the logic of the application can achieve fine flow control through the three-segment control process, and widen the flow adjustment range; the forward intermittent segment and the reverse intermittent segment use inertia to make the air bag continue to complete the stroke, the coil is synchronized with heat dissipation when the electromagnetic coil current is cut off, heat accumulation caused by continuous power supply is avoided, and a low-temperature operating state is maintained; the forward energy compensation segment and the reverse energy compensation segment compensate the electromagnetic force to offset the inertia attenuation, ensure that the air bag stroke is in place, reduce the jamming phenomenon when high-resistance medium (including dust and viscous liquid) is transported, the flow stability is improved, and the high-resistance medium can be adapted; in the conventional logic, the coil current is reversed instantaneously when the forward and reverse directions are switched, the electromagnetic force changes from "maximum forward value" to "maximum reverse value", the impact on the connecting rod and the air bag is large, and "electromagnetic noise" is generated due to the sudden change of current; the improved logic of the application provides a buffer for the forward and reverse switching in the forward intermittent segment and the reverse intermittent segment, the electromagnetic force is gradually established, the impact force is reduced, the mechanical wear is reduced, the noise is reduced, and the low-noise environment is adapted; the multiple effects of "low heat, wide flow adjustment, low impact noise, and high resistance adaptation" are achieved. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.
[0026] Figure 1 It is a symmetric on-off logic diagram for the forward and reverse control of the existing electromagnetic diaphragm pump.
[0027] Figure 2 It is an on-off logic diagram for the segmented on-off forward and reverse control of the electromagnetic diaphragm pump of the present application.
[0028] Figure 3 It is a system block diagram of the electromagnetic diaphragm pump of the present application.
[0029] Figure 4 It is a perspective view of the electromagnetic diaphragm pump of the present application.
[0030] Figure 5 It is a sectional view of the electromagnetic diaphragm pump of the present application.
[0031] In the figure: 1 electromagnetic diaphragm pump body, 2 permanent magnet, 3 U-shaped electromagnet, 4 connecting rod, 5 air bag, 6 diaphragm, 7 inlet, 8 outlet. DETAILED DESCRIPTION
[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.
[0033] Embodiment 1, a segmented on-off forward and reverse control method of an electromagnetic diaphragm pump, as shown in Figure 2 and Figure 4As shown, the control method comprises the following steps: Step 1: forward starting section, control the drive circuit to input forward current to the electromagnet coil of the electromagnetic diaphragm pump, the duration T1, this stage establishes electromagnetic force through forward current, overcomes the initial resistance of the medium, and drives the air bag 5 to move in the positive direction; Step 2: forward intermittent section, cut off the current of the electromagnet coil, the duration T2, use inertia to make the air bag 5 continue to complete the forward stroke, at the same time because of cutting off the current, the coil naturally dissipates heat; Step 3: forward energy supplement section, input forward current to the electromagnet coil through the drive circuit again, the duration T3, supplement the forward electromagnetic force, and ensure that the air bag 5 moves in the positive direction to the right place; Step 4: reverse starting section, control the drive circuit to switch the current direction, input reverse current to the electromagnet coil, the duration T4, establish reverse electromagnetic force, and pull the air bag 5 to start moving in the reverse direction; Step 5: reverse intermittent section, cut off the current of the electromagnet coil, the duration T5, use inertia to make the air bag 5 continue to complete the reverse stroke, at the same time because of cutting off the current, the coil naturally dissipates heat; Step 6: reverse energy supplement section, input reverse current to the electromagnet coil again, the duration T6, supplement the reverse electromagnetic force, and ensure that the air bag 5 moves in the reverse direction to the right place; Step 7: cyclic execution, periodically repeat steps 1 to 6, make the electromagnetic diaphragm pump continuously carry out "forward three-section-reverse three-section" cycle, and realize continuous one-way conveying of the medium.The segmented on-off forward and reverse control method of the electromagnetic diaphragm pump optimizes the forward and reverse timing logic, constructs a three-segment control process of "start-intermittent-energy compensation" in the forward direction and a three-segment control process of "start-intermittent-energy compensation" in the reverse direction, and the conventional logic can only adjust the flow by "changing the forward and reverse cycle" (the shorter the cycle, the higher the frequency, the greater the flow), the adjustment range is narrow and the heat is easily intensified due to the high frequency. In the logic of the present application, fine flow control can be achieved through the three-segment control process to widen the range of flow adjustment; the forward intermittent segment and the reverse intermittent segment use inertia to make the air bag 5 continue to complete the stroke, and the coil is synchronized with heat dissipation when the electromagnetic coil current is cut off, avoiding heat accumulation caused by continuous power supply and maintaining a low-temperature operating state; the forward energy compensation segment and the reverse energy compensation segment compensate the electromagnetic force to offset the inertia decay, ensure the air bag 5 to reach the stroke, reduce the jamming phenomenon when conveying high-resistance medium (including dust and viscous liquid), improve the flow stability, and adapt to high-resistance medium; when the conventional logic switches between forward and reverse, the coil current is reversed instantaneously, and the electromagnetic force changes from "maximum forward value" to "maximum reverse value", which causes a large impact on the connecting rod and the air bag, and the current mutation produces "electromagnetic noise"; the improved logic of the present application provides a buffer for forward and reverse switching in the forward intermittent segment and the reverse intermittent segment, the electromagnetic force is gradually established, the impact force is reduced, the mechanical wear is reduced, the noise is reduced, and the low-noise environment is adapted; The present application realizes the multiple effects of "low heat, wide flow adjustment, low impact noise and high resistance adaptation", solves the technical problems of existing electromagnetic diaphragm pumps using "forward power T1 + reverse power T1" symmetric on-off logic, which causes serious coil heating, narrow flow adjustment range, high noise and poor adaptability to high-resistance medium.
[0034] Among them, the forward intermittent segment is set in the forward phase and the reverse intermittent segment is set in the reverse phase, so that the pump body is in the power-off zero power consumption mode in the non-driving state. Compared with the conventional 'continuous power supply or high-frequency on-off' control logic, the invalid power consumption is reduced, and the overall energy consumption is significantly reduced.
[0035] The specific analysis of the low impact noise realized by the present application is as follows: The timing essence of the existing diaphragm pump is that the forward 100% current is directly switched to the reverse 100% current, the current direction and intensity suddenly change, the magnetic field oscillates violently, and the electromagnetic noise peak is high, which also leads to the main noise types of the existing electromagnetic diaphragm pump including: a. Electromagnetic noise: caused by the change of current of the electromagnetic coil. When the coil current is suddenly turned on or off, rises or reverses, it will cause the magnetic field to fluctuate violently, producing electromagnetic radiation noise (similar to the "buzzing sound" when the relay is attracted).
[0036] b. Mechanical noise: Impact from the movement of the air bag. The air bag expands / contracts under the drive of current, if it directly hits the end point (maximum stroke) of the pump cavity at "full speed", it will have a hard impact with the components, producing "dunk-dunk sound" or vibration noise.
[0037] In combination with the "start → intermittent → energy supplement" timing designed in this application (and consistent reverse parameters), both electromagnetic noise and mechanical noise will be targeted to be suppressed, and the specific analysis is as follows: 1) Electromagnetic noise reduction: from "segmented power supply instead of direct on-off" The essence of the timing of this application is to split "traditional 100% continuous power supply" into "start (short power supply) → intermittent (power off) → energy supplement (short power supply)", which naturally reduces current mutation and thus suppresses electromagnetic noise; As a comparison, the existing timing is directly switched from forward 100% current to reverse 100% current, the current direction and intensity suddenly changes, the magnetic field shakes violently, and the electromagnetic noise peaks.
[0038] The timing design of this application: a) Start segment: The current gradually rises from 0 to the target value (even if no ladder is intentionally made, short-time power supply is smoother than "instant full power" mutation), reducing electromagnetic radiation during start-up; b) Intermittent segment: The current is temporarily cut off, rather than continuously maintaining full power, to avoid the coil being in a high magnetic field state for a long time and reduce continuous electromagnetic noise; c) Energy supplement segment: Only a small amount of current is supplemented (to maintain the air bag stroke, not to drive it to accelerate), the current change amplitude is small, and there is no obvious mutation; Forward and reverse switching: Because there is an intermittent segment in the forward direction, the current is already in a "low intensity or power-off state" before switching to the reverse direction, rather than the traditional "forward full power directly to reverse full power", which greatly reduces the current mutation amplitude during switching, and the electromagnetic noise naturally reduces.
[0039] 2) Mechanical noise reduction: The timing design of this application: a) Start segment: Power supply drives the air bag to start moving (accelerate); b) Intermittent segment (key): After power off, the air bag loses driving force and its speed gradually decreases (rather than continuously accelerating), and even temporarily stops, avoiding hitting the maximum stroke at "full speed"; c) Energy supplement segment: Only a small amount of energy is supplemented to maintain the current stroke of the air bag, rather than continuing to accelerate, further controlling the movement speed of the air bag.
[0040] As a comparison, the existing timing design: the coil is continuously powered at full power, and the air bag continuously expands / contracts at maximum speed until it hits the end point (maximum stroke) of the pump body, forming a "hard impact", and the mechanical noise is large.
[0041] In summary, the design of the "intermittent section" in the timing design of the present application directly regulates the air bag speed, avoiding the "full-speed hard impact" in traditional control, which reduces mechanical noise; in addition, the "forward three-stage-reverse three-stage" timing of the present application naturally reduces the mutation frequency and amplitude of the current (such as the current change of the start / energy supplement is more gentle than the traditional "instant full power", and there is no direct full power mutation in forward and reverse switching), which objectively also suppresses electromagnetic noise, so that the electromagnetic noise is reduced, that is, the present application achieves the purpose of low impact noise from the aspects of mechanical noise and electromagnetic noise.
[0042] Embodiment 2, on the basis of embodiment 1, a segmented on-off forward and reverse control method of an electromagnetic diaphragm pump, as shown in Figure 2 The current intensity of the forward start section and the forward energy supplement section is consistent. This design can avoid the current mutation when the two stages are connected, reduce the electromagnetic noise caused thereby; at the same time, it can make the air bag force stable during the start expansion and energy maintenance stroke, cooperate with the buffer of the forward intermittent section, avoid the mechanical impact noise caused by the sudden change of the air bag speed, and match the symmetric parameters with the reverse stage, further reduce the vibration noise.
[0043] Embodiment 3, on the basis of embodiment 2, a segmented on-off forward and reverse control method of an electromagnetic diaphragm pump, as shown in Figure 2 The current intensity of the reverse start section and the reverse energy supplement section is consistent. The current intensity of the reverse start section and the reverse energy supplement section is consistent. This design can avoid the current mutation when the two stages are connected, reduce the electromagnetic noise caused thereby; at the same time, it can make the air bag force stable during the start expansion and energy maintenance stroke, cooperate with the buffer of the reverse intermittent section, avoid the mechanical impact noise caused by the sudden change of the air bag speed, and match the symmetric parameters with the forward stage, further reduce the vibration noise.
[0044] Embodiment 4, on the basis of embodiment 3, a segmented on-off forward and reverse control method of an electromagnetic diaphragm pump, as shown in Figure 2 The duration T1 of the forward start section and the duration T4 of the reverse start section are the same. The duration T1 of the forward start section and the duration T4 of the reverse start section are the same to ensure that the electromagnetic force of the forward start section and the reverse start section is the same on the basis of the same forward current and reverse current, which is conducive to realizing the symmetric on-off logic of the electromagnetic diaphragm pump "forward power-on T1 + reverse power-on T4", and further ensuring that the speed change of the forward stroke and the speed change of the reverse stroke are symmetrical, avoiding additional vibration caused by uneven forward and reverse speed, and further reducing mechanical noise.
[0045] Embodiment 5, on the basis of embodiment 4, a segmented on-off forward and reverse control method of an electromagnetic diaphragm pump, as shown in Figure 2As shown, the duration T2 of the forward intermittent section and the duration T5 of the reverse intermittent section are the same. The design of the forward intermittent section and the reverse intermittent section enables the pump body to be in a power-off zero power consumption mode in the non-driven state, reduces invalid power consumption compared with the traditional 'continuous power-on or high-frequency on-off' control logic, and significantly reduces overall energy consumption. The duration T2 of the forward intermittent section and the duration T5 of the reverse intermittent section are the same to ensure that the electromagnetic force in the forward intermittent section and the reverse intermittent section is the same on the basis of the same forward current and reverse current, which is conducive to achieving the symmetric on-off logic of the electromagnetic diaphragm pump 'forward intermittent section T2 + reverse intermittent section T5'. The design of the forward intermittent section and the reverse intermittent section is to ensure that after power-off, the air bag loses driving force, the speed gradually decreases (rather than continuously accelerates), and even temporarily stops, avoiding impact at maximum stroke at 'full speed'.
[0046] Embodiment 6, on the basis of embodiment 5, a segmented on-off forward and reverse control method of an electromagnetic diaphragm pump, as shown in Figure 2 As shown, the duration T3 of the forward energy supplement section and the duration T6 of the reverse energy supplement section are the same. The duration T3 of the forward energy supplement section and the duration T6 of the reverse energy supplement section are the same to ensure that the electromagnetic force in the forward energy supplement section and the reverse energy supplement section is the same on the basis of the same forward current and reverse current, which is conducive to achieving the symmetric on-off logic of the electromagnetic diaphragm pump 'forward energy supplement section T3 + reverse energy supplement section T6', and further ensuring that the speed change of the forward stroke and the speed change of the reverse stroke are symmetric, avoiding additional vibration caused by uneven forward and reverse speed, and further reducing mechanical noise.
[0047] Embodiment 7, on the basis of embodiment 6, a segmented on-off forward and reverse control method of an electromagnetic diaphragm pump, as shown in Figure 3 、 Figure 4 and Figure 5 As shown, the drive circuit is an H-bridge circuit. The advantage of the H-bridge circuit is that it can quickly switch the current direction, which is conducive to quickly switching the forward stage and the reverse stage of the electromagnetic diaphragm pump of the present application.
[0048] When embodiment 7 is implemented: 1. Forward stage control Step 1: Forward start section Control the drive circuit (such as an H-bridge circuit) to pass a forward current to the electromagnet coil of the electromagnetic diaphragm pump, with a duration T1. This stage quickly establishes electromagnetic force through a short strong current, overcomes the initial resistance of the medium, and pushes the air bag 5 to start moving in the positive direction.
[0049] Step 2: Forward intermittent section Cut off the electromagnet coil current, with a duration T2. Use the inertia of the air bag 5 to make the air bag 5 continue to complete the forward stroke, while the coil naturally cools down and the temperature decreases, avoiding heat accumulation caused by continuous power-on.
[0050] Step 3: Positive energy supplement segment Again, the driving circuit is used to pass positive current to the electromagnet coil, and the current intensity is consistent with the positive starting segment (T1), and the duration is T3. The electromagnetic force is supplemented to offset the inertia decay, ensuring that the air bag 5 reaches the designed maximum stroke, avoiding the flow decay caused by insufficient stroke.
[0051] 2. Reverse phase control Step 4: Reverse starting segment The control driving circuit switches the current direction and passes reverse current to the electromagnet coil, with a duration of T4. A reverse electromagnetic force is established to pull the air bag 5 to start moving in the reverse direction.
[0052] Step 5: Reverse intermittent segment The electromagnet coil current is cut off, with a duration of T5 (consistent with the positive intermittent segment). The inertia is used to make the air bag 5 continue to complete the reverse stroke, and the coil is synchronized to dissipate heat, maintaining a low-temperature operating state.
[0053] Step 6: Reverse energy supplement segment Again, the electromagnet coil is passed through reverse current, and the current intensity is consistent with the reverse starting segment, with a duration of T6 (consistent with the positive energy supplement segment). The reverse electromagnetic force is supplemented to ensure that the air bag 5 is in place in the reverse direction, completing a complete "positive-reverse" cycle.
[0054] 3. Cycle control Step 7: Cycle execution Repeat steps 1-6 to make the electromagnetic diaphragm pump continuously perform "positive three-segment-reverse three-segment" cycle to achieve continuous unidirectional delivery of the medium. Example 8, an electromagnetic diaphragm pump, based on any one of examples 1-7, as shown in Figure 5 The electromagnetic diaphragm pump uses the above-mentioned segmented on-off positive and negative control method. In the electromagnetic diaphragm pump controlled by the above-mentioned segmented on-off positive and negative control method, the positive phase and the reverse phase of the electromagnetic diaphragm pump are both set as a three-segment timing of "starting power-on segment-power-off intermittent segment-energy supplement power-on segment", and by precisely controlling the current on-off and duration of each segment, stable delivery of the medium is achieved.
[0055] Among them, the coil power-on ratio of the U-shaped electromagnet 3 in the electromagnetic diaphragm pump is reduced from the conventional logic of 100% to (T1+T3) / (T1+T2+T3), and the Joule heat is greatly reduced, so that the coil temperature of the U-shaped electromagnet 3 is controlled within a reasonable temperature range, the service life of the insulation layer is prolonged, and the overall service life of the electromagnetic diaphragm pump body is prolonged.
[0056] Example 9, based on example 8, an electromagnetic diaphragm pump, as shown in Figure 4 andFigure 5 As shown, the electromagnetic diaphragm pump comprises a pump body 1, an inlet 7, an outlet 8, an air bag 5 and a driving circuit are arranged on the pump body 1, a diaphragm 6 is arranged in the pump body 1 and cooperates with the inlet 7 and the outlet 8, a cavity is formed between the air bag 5 and the diaphragm 6, a power assembly is arranged in the pump body 1 and connected with the air bag 5, and the power assembly is used to drive the air bag 5 to deform or move, so as to adjust the volume of the cavity. On the electromagnetic diaphragm pump controlled by the above-mentioned segmented on-off forward and reverse control method, the activity of the power assembly controlled by the above-mentioned segmented on-off forward and reverse control method is further controlled, and the air bag 5 is driven to deform or move by the above-mentioned segmented on-off forward and reverse control method, so as to adjust the volume of the cavity.
[0057] Wherein one end of the diaphragm 6 forms the inlet one-way valve with the inlet 7 of the pump body 1, and the other end of the diaphragm 6 forms the outlet one-way valve with the outlet 8 of the pump body 1, when one end of the diaphragm 6 opens the inlet 7 of the pump body 1, the other end of the diaphragm 6 is pressed and blocks the outlet 8 on the pump body 1, when one end of the diaphragm 6 is pressed and blocks the inlet 7 of the pump body 1, the other end of the diaphragm 6 opens the outlet 8 on the pump body 1.
[0058] Example 10, on the basis of example 9, an electromagnetic diaphragm pump, as shown in Figure 3 , Figure 4 and Figure 5 As shown, the power assembly comprises a permanent magnet 2 arranged on the air bag 5, a U-shaped electromagnet 3 arranged on the pump body 1 and a connecting rod 4, the connecting rod 4 is adjustably arranged in the pump body 1, the permanent magnet 2 is fixed to one end of the connecting rod 4, the other end of the connecting rod 4 is rotatably connected with the pump body 1, the air bag 5 is connected to the middle part of the connecting rod 4, the U-shaped electromagnet 3 is arranged at intervals with the permanent magnet 2, and the U-shaped electromagnet 3 is used to control the reciprocating movement of the permanent magnet 2 to drive the air bag 5 to deform or move, so as to adjust the volume of the cavity. The permanent magnet 2 is fixed to one end (power end) of the connecting rod 4, the other end (the end away from the permanent magnet 2) of the connecting rod 4 is rotatably connected with the pump body 1 through a shaft structure (forming a swing fulcrum), and the middle part of the connecting rod 4 is fixedly connected with the center position of the air bag 5. When the U-shaped electromagnet 3 is electrified to generate an attractive force, the permanent magnet 2 drives the connecting rod 4 to swing upward around the shaft joint end of the pump body, the middle part of the connecting rod 4 pulls the air bag 5 to move upward through the fixed connection with the center of the air bag 5, so that the volume of the air bag 5 increases, realizing suction; when the U-shaped electromagnet 3 generates a repulsive force (or relies on a reset force), the permanent magnet 2 drives the connecting rod 4 to swing downward around the shaft joint end, pushes the air bag 5 to move downward, so that the volume of the air bag 5 decreases, realizing discharge; through the reciprocating swing of the connecting rod 4 around the shaft joint end of the pump body, the force of the permanent magnet 2 is converted into the up and down movement of the center of the air bag 5, completing the cycle of suction and discharge.
[0059] When the embodiment 10 is implemented, first, positive current is input to the U-shaped electromagnet 3, the two magnetic poles of the U-shaped electromagnet 3 generate a directional magnetic field, when the U-shaped electromagnet 3 generates an attractive force, the permanent magnet 2 drives the connecting rod 4 to swing upward around the shaft joint end, the middle part of the connecting rod 4 is fixedly connected with the center of the air bag 5, the air bag 5 is pulled to move upward, the volume of the air bag 5 is increased, one end of the diaphragm 6 close to the inlet 7 is opened, one end of the diaphragm 6 close to the outlet 8 is closed, the external medium is sucked into the air bag 5, and the suction process is completed; when reverse current is input to the U-shaped electromagnet 3, the two magnetic poles of the U-shaped electromagnet 3 generate a reverse directional magnetic field, when the U-shaped electromagnet 3 generates a repulsive force (or relies on a reset force), the permanent magnet 2 drives the connecting rod 4 to swing downward around the shaft joint end, the air bag 5 is pushed to move downward, the volume of the air bag 5 is reduced, one end of the diaphragm 6 close to the outlet 8 is opened, one end of the diaphragm 6 close to the inlet 7 is closed, the medium in the air bag 5 is quickly discharged through the outlet 8, and the discharge process is completed; by periodically switching the current direction on the U-shaped electromagnet 3, the circulating “positive magnetic force driving suction→reverse magnetic force driving discharge” action is formed, and the volume of the air bag 5 is switched in cycles of “increasing→reducing” in the circulating process.
[0060] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A segmented on-off positive-negative control method of an electromagnetic diaphragm pump, characterized by, The control method comprises the following steps: Step 1: forward starting segment, the control drive circuit is connected to the electromagnetic coil of the electromagnetic diaphragm pump with forward current, the duration T1, the electromagnetic force is established by the forward current, the initial resistance of the medium is overcome, and the air bag (5) is pushed to move in the positive direction; Step 2: forward intermittent segment, the current of the electromagnetic coil is cut off, the duration T2, the air bag (5) continues to complete the forward stroke by inertia, and because the current is cut off, the coil is naturally cooled; Step 3: forward energy supplement segment, the drive circuit is connected to the electromagnetic coil with forward current again, the duration T3, the forward electromagnetic force is supplemented, and it is ensured that the air bag (5) is in place in the forward stroke; Step 4: reverse starting segment, the control drive circuit switches the current direction, and the electromagnetic coil is connected with reverse current, the duration T4, the reverse electromagnetic force is established, and the air bag (5) is pulled to move in the reverse direction; Step 5: reverse intermittent segment, the current of the electromagnetic coil is cut off, the duration T5, the air bag (5) continues to complete the reverse stroke by inertia, and because the current is cut off, the coil is naturally cooled; Step 6: reverse energy supplement segment, the electromagnetic coil is connected with reverse current again, the duration T6, the reverse electromagnetic force is supplemented, and it is ensured that the air bag (5) is in place in the reverse stroke; Step 7: cyclic execution, periodically repeat steps 1 to 6, so that the electromagnetic diaphragm pump continuously performs "forward three-segment-reverse three-segment" cycle to realize continuous unidirectional delivery of the medium.
2. The method of claim 1, wherein: The current intensity of the forward starting segment and the forward energy supplement segment is consistent.
3. The method of claim 2, wherein: The current intensity of the reverse starting segment and the reverse energy supplement segment is consistent.
4. The method of claim 3, wherein: The duration T1 of the forward starting segment and the duration T4 of the reverse starting segment are the same.
5. The method of claim 4, wherein: The duration T2 of the forward intermittent segment and the duration T5 of the reverse intermittent segment are the same.
6. The method of claim 5, wherein: The duration T3 of the forward energy supplement segment and the duration T6 of the reverse energy supplement segment are the same.
7. The method of claim 6, wherein: The drive circuit is an H-bridge circuit.
8. An electromagnetic diaphragm pump, characterized by The electromagnetic diaphragm pump adopts the segmented on-off forward and reverse control method according to any one of claims 1-7.
9. The electromagnetic diaphragm pump of claim 8, wherein: The electromagnetic diaphragm pump comprises a pump body (1), wherein the pump body (1) is provided with an inlet (7), an outlet (8), an air bag (5) and a drive circuit, the pump body (1) is provided with a diaphragm (6) matched with the inlet (7) and the outlet (8), the air bag (5) and the diaphragm (6) form a cavity, and the pump body (1) is provided with a power assembly connected with the air bag (5), the power assembly is used for driving the air bag (5) to deform or move, so as to adjust the volume of the cavity.
10. The electromagnetic diaphragm pump of claim 9, wherein: The power assembly comprises a permanent magnet (2) arranged on the air bag (5), a U-shaped electromagnet (3) arranged on the pump body (1) and a connecting rod (4) which is adjustably arranged in the pump body (1), the permanent magnet (2) is fixed to one end of the connecting rod (4), the other end of the connecting rod (4) is rotatably connected with the pump body (1), the air bag (5) is connected to the middle part of the connecting rod (4), the U-shaped electromagnet (3) is arranged in interval with the permanent magnet (2), the U-shaped electromagnet (3) is used for controlling the reciprocating movement of the permanent magnet (2) to drive the air bag (5) to generate deformation or movement, so that the volume of the cavity can be adjusted.