Pressurizing ring-based fluid driving device and driving method thereof

Abstract

The invention discloses a pressurizing ring type fluid driving device and a driving method thereof, and particularly relates to a pump structure without mechanical friction and a resonant type, high-driving-efficiency and practical driving method. The pressurization ring type fluid driving device comprises a reciprocating vibrator, a flow guide cavity and a driving circuit. The flow guide cavity is provided with a vibrator mounting port, a flow supplementing port and an output port, and at least one pressurizing ring is arranged in the flow guide cavity; the driving method comprises the steps that the driving circuit applies an electric pulse to the vibrator, the period of the electric pulse for driving the vibrator to move in the compression direction is a forward period, the period of the electric pulse for driving the vibrator to move in the diastolic direction is a reverse period, and the period of the electric pulse for enabling the vibrator to be static at the tail end of a bidirectional stroke or slowly move at the tail end of the stroke is a maintaining period; and the duration of the maintaining section of the electric pulse is not 0, so that negative pressure is preferably formed at the maintaining section following the positive section and the vibrator, and zero pressure or positive pressure is preferably formed at the maintaining section following the negative section and the vibrator.

Description

Technical Field

[0001] The present invention relates to a fluid driving device based on a booster ring and a driving method thereof, and more specifically, to a pump structure without mechanical friction, and a resonant, high driving efficiency and practical driving method. Background Art

[0002] In traditional technologies, propellers, fans or pumps are often used to drive fluids to flow in one direction. Rotary power is often used to drive impellers, screws, etc. to rotate to drive fluids to flow in one direction, or to drive diaphragms and pistons to reciprocate with rotary power, and to cooperate with one-way valves to make fluids flow in one direction. This technology often uses electric, hydraulic, thermal and other motors as rotary power mechanisms, which have mechanical friction, high noise and complex structure, making it difficult to miniaturize and unsuitable for quiet and miniaturized needs.

[0003] The concept of ultrasonic fluid pump has been proposed in recent years, hoping to use a sheet-shaped ultrasonic generator as a power source and cooperate with the cavity to achieve unidirectional drive of the fluid. For example: The funnel-shaped valveless piezoelectric pump disclosed in patent CN106246516A uses a piezoelectric vibrator as a power source and is matched with a Y-shaped structure of the pump body, hoping to achieve unidirectional drive of the fluid. The measured results are as follows: ① At its fluid outlet, fluid vibrations of the same frequency as the piezoelectric vibrator can be generated. The fluid must be introduced in time at its fluid outlet to achieve unidirectional drive of the fluid; ② With 3 ~ When the piezoelectric vibrator is driven at full power of 4W, it can only output a pressure of about 100mmH2O and a pressure of 0.4 ~ With a flow rate of 0.7L / min., its driving efficiency is far lower than that of existing fan and pump products, and its practical value is low.

[0004] Patent 202111181816.5 is a patent applied for by the applicant. Its core technology is similar to that of CN106246516A, but it proposes to add a one-way valve concept, and does not disclose the specific structure of the one-way valve. Therefore, its disclosed technical part, like patent CN106246516A, does not have much practical value.

[0005] In summary, the above two related patents basically represent the current technical level of ultrasonic fluid pumps. Except for disclosing the structure of the vibrator (piezoelectric vibrator) + fluid chamber, neither of them discloses practical technology. That is, the creativity of the technology needs to be explored before the technology can enter the practical stage. Otherwise, it can only be in the conceptual stage or used in occasions with extremely low pressure and flow requirements.

[0006] After research, it is found that the existing technologies of ultrasonic fluid pumps represented by the above two patents have defects and the key to their practical application lies in: The prior art uses the natural frequency of the vibrator as the driving frequency, focusing on operating at the resonant frequency of the vibrator itself and ensuring the emission efficiency of the vibrator. The design concept is to fit all with one, believing that as long as the emission efficiency of the vibrator is the highest, the optimal effect can be achieved regardless of the fluid being driven. For the optimization of the driving efficiency, only the structural form itself is emphasized, while the matching problem of the entire driving system is ignored.

[0007] The relationship between the fluid driven by the pump and the structure and size of the pump body has not been analyzed. Research has shown that the correlation between the pump body structure + size and parameters such as the viscosity of the driven fluid is high, and it has a great impact on the output pressure and flow rate. The key to practical application is to achieve resonance between the driving frequency, the fluid, and the structure as the optimal state. Therefore, different from traditional pumps and fans, it cannot be used for multiple purposes, and different structural sizes need to be adapted according to different fluids. The fluid movement corresponding to each period during driving and the corresponding relationship between each movement and the expected output pressure and flow rate have not been analyzed, resulting in extremely low driving efficiency, almost zero, and most of the driving energy being converted into heat generation of the piezoelectric vibrator (vibrator) itself and the temperature rise of the driven fluid. The key to practical application is to implement corresponding flow control for the fluid in the positive and negative half - cycles of each vibration period through the combination of the driving method and the structure, reduce the ineffective reciprocating vibration of the fluid during driving, and take the "scoop one spoon and replenish one spoon" (abbreviated as "three - collaborations" in this application) as the optimal design concept. The better the cooperation, the more accurate the control, the higher the driving efficiency, and the higher the output pressure and flow rate.

[0008] In response to the fatal defects of the prior art, through further practical research, optimization, and testing, this application has obtained breakthrough results. The measured output pressure and flow rate under the same power can reach dozens of times that of the existing technology. Summary of the Invention

[0009] In view of the fatal defects of the prior art, which only exists in the conceptual stage, is difficult to apply, and has a vague working principle, combined with market demand, the present invention provides a pressurized - ring - type fluid driving device and its driving method to solve the problems of the existing technology.

[0010] According to actual needs, one or more embodiments of this specification provide a pressurized - ring - type fluid driving device and its driving method, which solve the limitations and defects of the current technology listed in the background art and provide a practical solution. The technical solution of the present invention is as follows: The pressurized - ring - type fluid driving device and its driving method provided by the present invention are as follows: The fluid driving device includes a reciprocating vibrator, a diversion cavity, and a driving circuit; The diversion cavity is provided with a vibrator mounting port, a replenishing port, and an output port, and is internally provided with at least one pressurized ring; The vibrator is installed at the vibrator installation opening of the diversion cavity and is electrically connected to the drive circuit. The direction facing the vibrator installation opening is the compression direction, and the opposite direction is the relaxation direction; The drive circuit drives the vibrator to reciprocate with electrical pulses. For the electrical pulses, the period when it drives the vibrator to move in the compression direction is the positive section, the period when it drives the vibrator to move in the relaxation direction is the negative section, and the period when the vibrator is stationary at the end of its two-way stroke or moves slowly at the end of its stroke is the maintenance section; The drive method includes: The drive circuit applies electrical pulses to the vibrator to drive the vibrator to reciprocate according to the following timing: The positive section of the electrical pulse drives the vibrator to move to the end of the stroke along the compression direction. The following maintenance section maintains the vibrator stationary or moving slowly at the end of the stroke until the maintenance section ends when zero pressure or negative pressure is formed at the vibrator. The negative section of the electrical pulse drives the vibrator to move to the end of the stroke along the relaxation direction. The following maintenance section maintains the vibrator stationary or moving slowly at the end of the stroke until the maintenance section ends when zero pressure or positive pressure is formed at the vibrator; For the diversion cavity, the distance between the front end of the vibrator installation opening and the front end of the nearest pressure increasing ring is not greater than the distance that the driven fluid propagates when driven by the positive section and the following maintenance section once.

[0011] In this application, by setting a pressure increasing ring in the diversion cavity, specifically setting the distance between the pressure increasing ring and the vibrator, and combining the specific parameters of the drive pulse, the drive efficiency can be optimized. The principle is as follows: When the vibrator reciprocates, the fluid in the space it "sweeps" is removed / introduced. In this application, the volume of this part of the space is called the "one-way volume", the corresponding fluid volume is called the "one-way flow rate", and the mechanical waves exerted on the fluid by the vibrator under the drive of a single positive section and negative section are respectively called the "positive half wave" and the "negative half wave". The vibrator exerts mechanical pulses on the fluid to form standing waves with alternating density and sparsity inside the fluid. The dense section of the fluid bears positive pressure, and the sparse section of the fluid bears negative pressure.

[0012] After optimizing the above design parameters in this application, due to the matching among the distance between the vibrator and the nearest pressure boosting ring, the non-zero holding section of the driving pulse, and the fluid being driven, time is reserved for the forward half-wave of the fluid to propagate between the vibrator and the nearest (first) pressure boosting ring. After the forward half-wave completely passes through the first pressure boosting ring, the holding section ends. At this time, due to the fluid viscosity and motion inertia, the fluid at the vibrator is in a zero-pressure or even negative-pressure state (the positive pressure of the standing wave is at the pressure boosting ring). After the reverse-section driving pulse is started, the fluid at the vibrator further enters a negative-pressure state. Since the pressure at this position in the diversion cavity is less than the pressure at the fluid replenishing port of the diversion cavity, the nearest fluid replenishing port preferentially replenishes the fluid. Under the inertial impact of the fluid at the replenishing port, an instantaneous positive-pressure impact is formed, and the subsequent holding section of the reverse section accepts this as the optimal state. In this way, the system composed of the fluid, the diversion cavity, and the driving pulse enters an efficient resonance state, and the driving efficiency reaches a practical level.

[0013] As summarized in the "Three Collaborations" in the background technology of this application, after this application is implemented, the forward section of the driving process forms a forward half-wave in the fluid. After passing through the non-zero holding section, the one-way flow rate of the fluid is completely received by the pressure boosting ring, which is "scooping a spoonful and using a spoonful". Then, in the reverse section of the driving process, since the pressure at the fluid replenishing port close to the vibration is greater than the pressure at the position in the diversion cavity close to the vibrator, the fluid replenishing port preferentially replenishes the fluid into the diversion cavity, which is "replenishing a spoonful with a spoonful". That is, this application controls the flow direction of the fluid through resonance, effectively improving the driving efficiency - resonance is the key to the practical application of the technology in this application.

[0014] As a further technical solution, the fluid replenishing port is the gap between the vibrator and the vibrator mounting port, or the notch on the vibrator mounting port, or the opening on the diversion cavity wall close to the vibrator mounting port; The pressure boosting ring is a component for unidirectionally boosting the pressure of the fluid in the diversion cavity, which expands the fluid channel in the diversion cavity into a main passage and a buffer chamber; on the main passage, there is a diversion plate with a hard and smooth surface, and its diversion angle (the angle between the diversion plate and the main channel) is not greater than 45°; the buffer chamber is connected to the main passage and is offset from the main passage, located on the opposite side of the diversion plate.

[0015] This solution provides a buffer chamber for the fluid wrapped by the forward half-wave through the specification of the fluid replenishing port and the pressure boosting ring, enabling the positive pressure to be released in the buffer chamber, and avoiding the backward flow of this fluid section under the action of the pressure difference in the reverse section of the driving process.

[0016] Secondly, the setting of the diversion plate can guide the positive-pressure fluid to move towards the buffer chamber. At the same time, the existence of the diversion angle makes the diversion plate form a diameter-reducing effect on the main passage, which can increase the local and instantaneous pressure at this position, conforming to the pressure characteristics of the fluid and Bernoulli's principle, and is beneficial to increasing the output pressure and flow rate.

[0017] As a further technical solution, the volume of the buffer chamber is greater than the volume difference generated by the vibrator during a single forward movement.

[0018] In this solution, the volume of the buffer chamber is defined so that it has enough space to accommodate the fluid carried by the forward stroke half-wave and prevent its backflow, thereby effectively improving the driving efficiency.

[0019] As a further technical solution, when the diversion cavity is provided with a plurality of pressure-increasing rings, the main passage of the first pressure-increasing ring is facing the vibrator, and the direction of the main channel of the first pressure-increasing ring is consistent with the reciprocating movement direction of the vibrator.

[0020] This solution ensures that within the range of the first pressure-increasing ring, the mechanical wave emitted by the vibrator propagates in a straight line in the diversion cavity. Since a large amount of energy loss will occur when the mechanical wave in the fluid bends, and the vibrator is the first station where the fluid receives vibration and transmits the pulsating pressure to the subsequent stage at the first pressure-increasing ring segment, the energy reception and transmission efficiency of this segment is the key to ensuring the driving efficiency. After being buffered by the buffer cavity of the pressure-increasing ring, the pulsating fluid transmitted to the subsequent stage has a reduced pulsation pressure difference and relatively less energy loss when flowing through the bent flow path.

[0021] As a further technical solution, the electric pulse is related to the fluid driven by the fluid driving device. The sum of the time occupied by the positive segment and the subsequent maintenance segment is not less than the time taken for the fluid pulsation to move from the vibrator to the nearest buffer cavity under the current positive segment drive; the sum of the time occupied by the negative segment and the subsequent maintenance segment is not less than the time taken for the fluid to flow through the center of the vibrator from the replenishing port.

[0022] This solution defines the technical parameters of the electric pulse from the perspective that the design of the control circuit conforms to the existing mechanical structure, and realizes the design idea of optimizing the fluid driving efficiency from another perspective.

[0023] As a further technical solution, the electric pulse is an asymmetric pulse, that is, the duration of the maintenance segment in the compression direction is not equal to the duration of the maintenance segment in the relaxation direction.

[0024] Since the fluid segments of the vibrator during its two-way operation are different (the compression direction mainly operates on the fluid in the diversion cavity, and the relaxation direction mainly operates on the fluid at the replenishing port), there are inevitably differences in the resonance coefficients in the two directions. This solution uses different driving parameters to match different fluid segments to make the system resonance conditions more consistent and effectively improve the driving efficiency.

[0025] As a further technical solution, the electric pulse is a unipolar pulse, that is, in the compression movement and relaxation movement generated by driving the vibrator, only the movement in one of the directions is driven and completed by the electric pulse, and the movement in the other direction is that after the electric pulse disappears, the vibrator returns to its original position under its own elastic action.

[0026] This solution provides a unipolar pulse driving method, which can be driven by the simplest driving circuit, simplifies the driving circuit, and reduces the cost.

[0027] As a further technical solution, when the diversion cavity is provided with a plurality of pressure increasing rings, the diversion plates and buffer chambers of two adjacent pressure increasing rings are arranged in opposite directions to ensure that the main passage of the diversion cavity is linearly penetrated, reducing the flow resistance.

[0028] As an alternative technical solution, the vibrator is an electromagnetic vibrator.

[0029] As an alternative technical solution, the vibrator is a speaker, and the frequency of the electric pulse is outside 20 Hz ~ and 20 kHz.

[0030] This solution aims to prohibit audible noise during the driving process. From the perspective that the structure obeys the existing driving parameters, combined with the above technical solutions, the structure cooperates with the circuit to achieve resonant and efficient driving.

[0031] The beneficial effects after the implementation of the present invention are as follows: 1. It provides a fluid driving solution without a rotating mechanism and friction loss. Compared with traditional fluid driving technologies, it can reduce noise, simplify the structure, improve the service life, facilitate maintenance, and is suitable for miniaturization; 2. Compared with the existing piezoelectric oscillator type fluid driving technology, the present invention provides a specific practical driving method and a practical structure, enabling the technology of driving fluid by a vibrator to reach a practical level; 3. This solution discloses a specific technical solution for making the system reach the optimal resonance condition, improving the driving efficiency, output pressure and flow rate; 4. It expands more practical fields for the technology of driving fluid by a vibrator. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings: Figure 1 is a schematic structural diagram of a fluid driving device provided with two - stage pressure increasing rings; Figure 2 is a schematic diagram of a trapezoidal driving pulse. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Embodiment 1 - A fluid driving device provided with two - stage pressure increasing rings AsFigure 1 As shown, the fluid drive device with a two-stage supercharging ring is composed of a vibrator 1 and a diversion cavity 2. Among them: The diversion cavity 2 is a through-channel, which is composed of a vibrator installation section 21, a first-stage supercharging section 22, a second-stage supercharging section 23, and an output section 24.

[0034] The vibrator installation section 21 is provided with a vibrator installation port 20, and a replenishing flow port 26 is provided on the side wall of the diversion cavity 2 near the vibrator installation port 20; The first-stage supercharging section 22 is provided with a first diversion plate 27, and the included angle between the first diversion plate 27 and Figure 1 the shown compression direction is less than 45°. In the direction opposite to the first diversion plate 27, a first buffer cavity 28 is provided; The second-stage supercharging section 23 is compactly and reversely docked with the first-stage supercharging section 22, and is provided with a second diversion plate 29, and the included angle between the second diversion plate 29 and Figure 1 the shown compression direction is less than 45°. In the direction opposite to the second diversion plate 29, a first buffer cavity 2A is provided; In two adjacent supercharging sections, the diversion plate and the buffer cavity are arranged in opposite directions to ensure that the main passage of the diversion cavity 2 is linearly penetrated.

[0035] The output section 24 is provided with a fluid output port 25.

[0036] During assembly, the vibrator 1 is installed in the vibrator installation port 20 of the diversion cavity 2, with the vibrating side facing the vibrator installation port 20; the fluid application device is docked with the fluid output port 25; the drive circuit (not shown) is electrically connected to the vibrator 1.

[0037] During operation, the assembled fluid drive device is placed in the fluid to be driven, and the drive circuit is started to apply Figure 2The driving pulse shown. During the positive section 31 of the driving pulse, under the action of the positive pulse edge 33, the vibrator's vibrating diaphragm (not shown) moves toward the vibrator mounting port 20 (i.e., the compression direction), squeezing the fluid in contact with the vibrating diaphragm to make it positive pressure; thereafter, the driving pulse enters the positive section maintenance section 34, and at the same time, the previous positive pressure vibration is preferentially transmitted along a straight line to the primary boosting section 22. The squeezed fluid encounters the first guide plate 27 during the movement. Since there is an angle of less than 45° between the first guide plate 27 and the driving direction, the moving fluid is constrained to change direction, and a part of it continues to move along the compression direction, and a part of it moves to the first boosting section 22. The first buffer chamber 28 moves, and the positive pressure therein is gradually balanced in this passage, so that positive pressure pulsation is produced in the passage; at the same time, due to factors such as the viscosity and inertia of the fluid, after the fluid in the current segment is pushed to the primary boosting section 22 by the positive section 31 of the driving pulse, at the vibrating diaphragm, the internal pressure of the fluid gradually changes from positive pressure to zero pressure, or even to negative pressure; when the trailing edge of the current pulsation of the guide chamber 2 enters the first buffer chamber 28 (the fluid pulsation with positive pressure completely passes through the primary boosting ring 22), the maintenance section 34 of the positive section 31 of the driving pulse ends, the reverse section 32 is started, and under the action of the negative pulse edge 35, the vibrating diaphragm moves to Figure 1 diastolic movement shown in ; the fluid pressure at the vibrating diaphragm is forced to be negative pressure; thereafter, the driving pulse enters the maintaining section 36 period of the reverse section 32. Since the fluid of the current segment in the guide chamber 2 is in the compression movement at this time, the fluid outside the guide chamber 2 enters the guide chamber 2 through the replenishing port 26 near the vibrating diaphragm to compensate for the negative pressure at the vibrating diaphragm; similarly, due to factors such as the viscosity and inertia of the fluid, as the fluid entering the guide chamber 2 through the replenishing port 26 increases, the fluid flow gradually forms a positive pressure shock on the vibrating diaphragm. Similar to the above, the positive pressure pulse caused by the positive section of the driving pulse in the guide chamber 2 to move in the compression direction, its rebound pulse reaches the vibrating diaphragm, further aggravating the positive pressure there (positive feedback). At this point, the maintaining section 36 of the reverse section 32 of the driving pulse ends, and enters the next driving cycle, and so on.

[0038] During this period, due to the presence of the first guide plate 27 at the primary boost ring 22, the diameter of the guide cavity 2 is reduced, and the pressure and flow rate at the reduced diameter are increased.

[0039] The pulsating fluid driven by the vibrating diaphragm in the guide cavity 2 flows through the primary boosting ring 22 and then enters the secondary boosting ring 23 . The fluid movement and pressure pulsation process are similar to those at the primary boosting ring 22 .

[0040] The multi-stage boosting ring can reduce the fluid backflow (enhance the unidirectional fluidity of the fluid in the guide cavity 2), improve the driving efficiency of the fluid, and balance the fluctuation at the fluid output port 25, making the output pressure and flow more stable.

[0041] As can be seen from the above description, in this embodiment, the driving pulse frequency of the driving circuit is closely related to the structural dimensions of the diversion cavity 2 and the basic characteristics of the fluid; the positive and negative section timings of the driving pulse are also closely related to the structural dimensions of the diversion cavity 2 and the basic characteristics of the fluid. Among them, the most crucial ones are the positive and negative section timings of the driving pulse, which respectively correspond to the time when the fluid pulse reaches the size of the pressurizing ring and the time when the fluid at the replenishing port 26 reaches the vibrating diaphragm. Moreover, at the moment when the positive section 31 and the negative section 32 of the driving pulse are switched to each other, the vibrating diaphragm is in a negative pressure state and a positive pressure state respectively, and is superimposed with the rebound (reflection) pulse of the fluid moving along the compression direction in the diversion cavity 2 and the inertial impact of the fluid from the replenishing port 26, constituting positive feedback, so that the system composed of the fluid, the vibrator 1, and the diversion cavity 2 enters the resonance state, and the fluid driving efficiency reaches the optimum.

[0042] The advantages after implementing this embodiment are as follows: 1. In terms of design concept, through in-depth analysis of the fluid driving process, the idea of overall design with the fluid, the vibrator, and the diversion cavity as a whole is clarified, abandoning the "multi-purpose in one machine" design idea in traditional technologies to guide the specific design of the vibratory fluid driving scheme; 2. For the first time, the characteristics of the fluid itself (viscosity, density, etc.) are incorporated into the variables that must be considered in the design, providing a guiding ideology for the practical vibratory fluid driving scheme; 3. Aiming at resonance to improve the fluid driving efficiency; 4. The settings of the flow guide plate and the buffer cavity provide a specific scheme for balancing the pressure pulsation of the fluid flowing along the compression direction, weakening the fluid backflow, and increasing the compression direction pressure and flow rate; 5. Under a simple structure, the vibratory fluid driving scheme has practicability. Embodiment

[0043] In another embodiment, the fluid driving is combined with a music player. The driven fluid is gas, and the vibrator is a loudspeaker. For example, a device designed by combining an atomizer and a music player. In this device, the loudspeaker of the music player also serves as the air supply device (such as a fan, an air pump, etc.) in the traditional atomizer technology, and the diversion cavity also serves as the resonator of the music player.

[0044] The advantages after implementing this embodiment are as follows: ① Multiple components are used concurrently, which can effectively reduce costs and reduce the overall volume of the machine; ② When driving the loudspeaker with audio (such as music), if the driven gas is visible or has visible particles floating, the output air flow can present a rhythm synchronized with the audio, increasing the interest.

[0045] In another embodiment, the vibrator is a large-diameter electromagnetic vibrator, and the frequency of the driving pulse is lower than 20 Hz. That is, the fluid is driven by infrasound.

[0046] The advantages after implementing this embodiment are as follows: It avoids using the high-frequency and high-voltage drive circuits for driving piezoelectric vibrators in traditional technologies. With a simple circuit, infrasound can be generated, featuring high electrical efficiency, low cost, and high reliability.

[0047] In another embodiment, the control circuit drives the vibrator with unipolar pulses, that is, in the compression movement and relaxation movement generated by driving the vibrator, only the movement in one of the directions is completed by the drive of an electrical pulse. For the movement in the other direction, after the electrical pulse disappears, the vibrator returns to its original position under its own elastic action, without the need for a reverse-polarity pulse to force the return.

[0048] The advantages after implementing this embodiment are as follows: There is no need for a bipolar power supply to send bipolar pulses to the vibrator, nor is it necessary to use a free resonance circuit to generate bipolar pulses, which can greatly simplify the control circuit and reduce costs.

[0049] The above describes specific embodiments of this specification, and other embodiments are within the scope of the appended claims. In some cases, the structures recited in the claims can achieve the desired results according to the above specific embodiments. The innovative and design concept of the present invention lies in: making the drive pulse indicators (frequency and the duration ratio of the positive and negative segments + the sustain segment pulses), the fluid to be driven, and the structural dimensions of the diversion cavity match each other, so that the fluid to be driven forms resonance in the diversion cavity. Those skilled in the art can easily achieve the desired results according to the above specific embodiments and their design concepts.

[0050] The above is only one or more embodiments of this specification and is not used to limit this specification. For those skilled in the art, the technologies of one or more embodiments of this specification can be combined newly to achieve new implementation schemes, or there can be various modifications and changes. Any modifications, equivalent replacements, improvements, technical combinations, etc. made within the spirit and principles of one or more embodiments of this specification shall be included within the scope of the claims of this specification.

Claims

1. A fluid driving device based on a pressurized ring and a driving method thereof, characterized in that: The fluid driving device comprises a reciprocating vibrator, a flow guiding chamber and a driving circuit; The flow guide cavity is provided with a vibrator installation port, a flow supplement port and an output port, and is provided with at least one boosting ring; The vibrator is installed at the vibrator installation port of the guide cavity and is electrically connected to the drive circuit. The direction facing the vibrator installation port is the compression direction, and the opposite direction is the relaxation direction. The driving circuit drives the vibrator to reciprocate with electric pulses, wherein the period of time during which the electric pulse drives the vibrator to move in a compression direction is a positive period, the period during which the electric pulse drives the vibrator to move in a relaxation direction is a negative period, and the period during which the vibrator is stationary at the end of its bidirectional stroke or moves slowly at the end of its stroke is a maintaining period; The driving method comprises: The driving circuit applies electric pulses to the vibrator to drive the vibrator to reciprocate according to the following timing: The positive segment of the electric pulse drives the vibrator to move in the compression direction to the end of the stroke, and the following maintenance segment keeps the vibrator stationary or slows at the end of the stroke until zero pressure or negative pressure is formed at the vibrator, and the maintenance segment ends; the negative segment of the electric pulse drives the vibrator to move in the relaxation direction to the end of the stroke, and the following maintenance segment keeps the vibrator stationary or slows at the end of the stroke until zero pressure or positive pressure is formed at the vibrator, and the maintenance segment ends; The distance between the front end of the vibrator installation port of the guide cavity and the front end of the nearest boost ring is not greater than the distance that the driven fluid propagates when it is driven once by the positive section and the subsequent maintaining section.

2. A booster ring-type fluid drive device and a driving method thereof according to claim 1, characterized in that: The flow filling port is a gap between the vibrator and the vibrator mounting port, or a notch on the vibrator mounting port, or an opening located on the guide cavity wall near the vibrator mounting port; The boost ring is a component located in the guide cavity for unidirectionally boosting the fluid, expanding the fluid channel in the guide cavity into a main passage and a buffer chamber; a guide plate with a hard and smooth surface is provided on the main passage, and its guide angle (the angle between the guide plate and the compression direction) is not greater than 45°; the buffer chamber is connected to the main passage, deviates from the main passage, and is located on the opposite side of the guide plate.

3. The booster ring-based fluid drive device and the driving method thereof according to claim 1 are characterized in that: The volume of the buffer chamber is greater than the volume difference generated by the vibrator during a single compression movement.

4. The booster ring-based fluid drive device and the driving method thereof according to claim 1 are characterized in that: When the guide cavity is provided with a plurality of boosting rings, the main passage of the first boosting ring is directly opposite to the vibrator, and the main passage direction of the first boosting ring is consistent with the reciprocating motion direction of the vibrator.

5. The booster ring-based fluid drive device and the driving method thereof according to claim 1 are characterized in that: The electric pulse is related to the fluid driven by the fluid driving device, and the sum of the time occupied by the positive segment and the maintenance segment immediately following the positive segment is not less than the time occupied by the fluid pulsation moving from the vibrator to the nearest buffer chamber under the current positive segment drive; The sum of the time taken by the reverse segment and the maintenance segment following the reverse segment is not less than the time taken by the fluid to flow from the supplementary flow port through the center of the vibrator.

6. The booster ring-based fluid drive device and the driving method thereof according to claim 1 are characterized in that: The electric pulse is an asymmetric pulse, that is, the duration of the sustaining segment following the positive segment is different from the duration of the sustaining segment following the negative segment.

7. The booster ring-based fluid drive device and the driving method thereof according to claim 1 are characterized in that: The electric pulse is a unipolar pulse, that is, among the compression movement and relaxation movement generated by the vibrator driven by it, only the movement in one direction is driven by the electric pulse, and the movement in the other direction is completed when the vibrator returns to its original position under the action of its own elasticity after the electric pulse disappears.

8. The booster ring-based fluid drive device and the driving method thereof according to claim 1 are characterized in that: When the guide cavity is provided with a plurality of boosting rings, the guide plates and buffer chambers of two adjacent boosting rings are arranged in relative directions to ensure that the main passage of the guide cavity is straight-through and reduce the flow resistance.

9. The booster ring-type fluid driving device and driving method thereof according to claim 1 is characterized in that: The vibrator is an electromagnetic vibrator.

10. The booster ring-based fluid driving device and driving method thereof according to claim 1, characterized in that: The vibrator is a speaker, and the frequency of the electric pulse is outside 20 Hz to 20 kHz.

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