A speed-adjustable atomization device

Abstract

The present invention relates to the technical field of atomizers, and discloses a speed-adjustable atomizing device, including a seat body, a bottle body, and an atomizing motor. A jaw groove is provided on the seat body in the horizontal direction, a piezoelectric crystal is arranged in the jaw groove, and a force transmission amplification mechanism is arranged between the bottle body and the piezoelectric crystal; a control unit is also arranged in the seat body, the control unit is connected to the piezoelectric crystal signal, and the control unit determines the liquid level of the atomized liquid and the actual atomization rate; the atomizing motor is connected to the control unit signal, and the control unit is used to transmit a speed signal to the atomizing motor. The control unit can continuously measure the liquid level in real time by detecting the change in the charge amount of the piezoelectric crystal, and the actual atomization rate can be obtained according to the rate of change of the liquid level. The control unit compares the actual atomization rate with the value of the preset atomization rate, and then adjusts the speed of the atomizing motor, completing the closed-loop control of "liquid level-atomizing motor speed", outputting the same solute concentration at different liquid levels, and ensuring the health of personnel.

Description

Technical Field

[0001] The invention relates to the technical field of atomizers, and in particular to a speed-adjustable atomizer. Background Art

[0002] The atomizer uses an air pump to break down the liquid in the liquid container into fine water droplets and distribute them to the surrounding environment. It has been widely used in daily life, such as aromatherapy machines in hotels, lobbies and other places. The atomizer includes an atomizer motor and a liquid storage container. The liquid storage container is simply a container for storing liquid. It cannot obtain the liquid level in time and does not have a liquid level prompt function. The user cannot add atomized liquid in time, causing the atomizer motor to do useless work, resulting in unnecessary energy loss, and cannot meet the requirements of green living.

[0003] The utility model patent with the authorization announcement number CN209645581U and the authorization announcement date of November 19, 2019 discloses an ultrasonic atomizing liquid storage device, including a liquid storage tank, a motor, a transmission rod, a stirring rod, a heater and a liquid level meter. A base is provided at the bottom of the liquid storage tank, a motor is provided on the inner side of the base, a transmission rod is provided on the upper side of the motor, stirring rods are provided on both sides of the transmission rod, a heater is installed between the stirring rods, a motor is provided on the inner side of the stirring rod, a propeller is installed on the lower side of the motor, a through pipe is provided on the lower left side of the liquid storage tank, a control panel is provided on the left side of the liquid storage tank, a liquid level meter is installed on the right side of the liquid storage tank, a transparent glass tube is provided on the inner side of the liquid level meter, the transparent glass tube is connected to the liquid storage tank through a wire, and a float is provided on the inner side of the transparent glass tube. The above-mentioned ultrasonic atomizing liquid storage device installs a liquid level meter on the liquid storage tank, and uses the transparent glass tube and the inner float to detect the liquid level, so that the user can add liquid in time.

[0004] Most of the existing atomizer motors work at a fixed speed, that is, the atomization rate of the atomizer motor remains fixed when the remaining reserve of the atomized liquid changes. However, the actual atomization rate of the atomizer is affected by the working conditions such as the air humidity and temperature of the external environment. For example, the atomizer is used in an aromatherapy machine. Since the aromatic hydrocarbons in the aromatherapy essential oil are low-toxic and most of them are chemically synthesized, there are many chemical toxins in them, which can cause great harm to people. If the concentration of the aroma volatiles of the aromatherapy is too high, inhaling the overly strong fragrance for a long time will be harmful to health.

[0005] When the remaining reserve of the atomized liquid changes, the atomized liquid has different solute concentrations at different liquid levels due to the precipitation of solutes, stratification of different solutions in the mixed solution, etc., resulting in different masses of aromatic hydrocarbons contained in the atomized droplets released at the same atomization rate. As the atomization time increases, the amount of solutes in the mixed solution increases, which will cause the concentration of aroma volatiles in the aromatherapy to be too high. If a high-precision liquid level sensor is used in the atomization container, the cost will increase significantly. Therefore, adaptive adjustment of the atomization rate of the atomization device is crucial. Summary of the invention

[0006] The purpose of the present invention is to provide a speed-adjustable atomizing device to solve the problem in the prior art that the atomizing rate remains unchanged when the liquid level of the atomized liquid changes, which is harmful to the health of personnel.

[0007] In order to achieve the above-mentioned object, the present invention provides an adjustable speed atomizing device, comprising a seat, a bottle body arranged on the seat, and an atomizing motor, wherein the bottle body has a receiving cavity for receiving atomized liquid, a jaw groove is provided on the seat in a horizontal direction, a piezoelectric crystal is arranged in the jaw groove, and a force amplification mechanism is further arranged between the bottle body and the piezoelectric crystal, wherein the force amplification mechanism is used to convert the gravity of the bottle body in a vertical direction into a pressure on the piezoelectric crystal in a horizontal direction;

[0008] A control unit is also arranged in the seat body, and the control unit is connected to the piezoelectric crystal signal. The piezoelectric crystal is used to transmit a pressure signal to the control unit, and the control unit is used to receive the pressure signal and determine the liquid level of the atomized liquid and the actual atomization rate;

[0009] The atomizing motor is connected to the control unit by signal. A preset atomizing rate is preset in the control unit. The control unit is used to compare the actual atomizing rate with the preset atomizing rate and transmit a rotation speed signal to the atomizing motor.

[0010] Preferably, two jaw grooves are symmetrically arranged with the center line of the seat body as the axis, and the piezoelectric crystals are respectively arranged in the two jaw grooves.

[0011] Preferably, the piezoelectric constants of the two piezoelectric crystals are different.

[0012] Preferably, the force transmission amplification mechanism includes a flat plate fixed to the bottom of the bottle body, and a connecting rod assembly respectively connected to the two piezoelectric crystals is arranged on the flat plate, and the connecting rod assembly includes a connecting rod, a rotating shaft and a slider. The flat plate is fixedly mounted on the bottom of the bottle body, the connecting rods are arranged in pairs, the top ends of the connecting rods are hinged to the connecting rods, the rotating shaft is rotatably mounted on the bottom ends of the connecting rods arranged in pairs, the slider is fixedly mounted on the rotating shaft, and the slider is slidably mounted on the base body along the horizontal direction.

[0013] Preferably, the connecting rods of the two connecting rod assemblies are arranged crosswise.

[0014] Preferably, the seat body comprises a base and a bottle shell arranged on the base, the bottle body is sleeved in the bottle shell, the height of the bottle body is higher than the height of the bottle shell, and the jaw groove is provided at the inner bottom of the bottle shell.

[0015] Preferably, the control unit comprises a liquid level detection module and a charge amplification module, and the charge amplification module is connected between the piezoelectric crystal and the liquid level detection module.

[0016] Preferably, a display screen is also arranged on the base, and the display screen is connected to the control unit by signal, and the display screen is used to receive the liquid level signal and the atomization rate signal transmitted by the control unit.

[0017] Compared with the prior art, the speed-adjustable atomizing device of the embodiment of the present invention has the following beneficial effects: the piezoelectric crystal has the characteristic of being pressure-sensitive, and when it is subjected to pressure in a specific direction, a charge flow will be generated, and the pressure signal will be converted into an electrical signal. By utilizing the positive piezoelectric effect of the piezoelectric crystal, when the liquid level changes, the force transmission and amplification mechanism converts the gravity change of the bottle body into the pressure change on the piezoelectric crystal in the horizontal direction, and amplifies the gravity change at the same time, thereby improving the measurement accuracy and sensitivity. The external force applied to the piezoelectric crystal changes, and the charge amount generated by the piezoelectric crystal changes with the change of the external force applied. The control unit can continuously measure the liquid level in real time by detecting the change of the charge amount, and the liquid level change can be detected without direct contact with the atomized liquid, thereby avoiding liquid contamination and extending the service life of the atomizing device. The actual atomization rate can be obtained according to the rate of change of the liquid level. After comparing the actual atomization rate with the value of the preset atomization rate, the control unit transmits a speed signal to the atomizing motor, adjusts the speed of the atomizing motor, completes the closed-loop control of "liquid level-atomizing motor speed", realizes adaptive adjustment of the atomization rate, outputs the same solute concentration at different liquid levels, and ensures the health of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the speed-adjustable atomizing device of the present invention;

[0019] Figure 2 yes Figure 1 A schematic diagram of the internal structure of the speed-adjustable atomization device;

[0020] Figure 3 yes Figure 2 A three-dimensional schematic diagram of a force transmission amplification mechanism of a speed-adjustable atomization device;

[0021] Figure 4 yes Figure 3A top view of the force transmission amplification mechanism installed on the bottle shell;

[0022] Figure 5 yes Figure 4 A three-dimensional diagram of a force transmission amplification mechanism installed on a bottle shell;

[0023] Figure 6 yes Figure 1 A structural block diagram of an adjustable speed atomization device;

[0024] Figure 7 yes Figure 1 Flow chart of the adjustable speed atomization device.

[0025] In the figure, 1. bottle body; 2. bottle shell; 3. base; 4. switch button; 5. power interface; 6. output port; 7. control unit; 8. display screen; 9. first piezoelectric crystal; 10. second piezoelectric crystal; 11. first slider; 12. second slider; 13. plate; 14. bolt; 15. connecting rod; 16. nut; 17. rotating shaft; 18. right-angle iron; 19. force transmission amplification mechanism; 201. display module; 202. liquid level detection module; 203. mixed liquid; 204. atomizing motor; 205. adjustment module. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] A preferred embodiment of a speed-adjustable atomizing device of the present invention is as follows: Figures 1 to 7 As shown, the speed-adjustable atomizing device includes a seat, a bottle body 1, an atomizing motor 204, a control unit 7 and a piezoelectric crystal. The bottle body 1 is arranged on the seat, and the bottle body 1 is used to contain atomized liquid. The control unit 7 is arranged on the seat, and the atomizing motor 204 is connected to the control unit 7 by signal. The control unit 7 is used to control the action of the atomizing motor 204 to control the operation of the speed-adjustable atomizing device.

[0028] The bottle body 1 is a cylindrical cavity structure, the inner cavity of the bottle body 1 forms a receiving cavity for accommodating the atomized liquid, and the top of the bottle body 1 is an open structure. The bottle body 1 is made of insulating material, and the bottle body 1 uses high-density polyethylene (HDPE). HDPE is a kind of high crystallinity, non-polar surface is translucent to a certain extent, it has good heat resistance and cold resistance, good chemical stability, high rigidity and toughness, good mechanical strength, dielectric properties, environmental stress cracking resistance is also good, hardness, tensile strength and creep are better than low-density polyethylene; wear resistance, electrical insulation, toughness and cold resistance are good; chemical stability is good, at room temperature, it is insoluble in any organic solvent, and is resistant to corrosion by acids, alkalis and various salts.

[0029] The base body includes a base 3 and a bottle shell 2. The bottle shell 2 is a cylindrical structure. The top of the bottle shell 2 is an open structure. The bottom of the bottle shell 2 is provided with a stepped outer wall surface with a reduced outer diameter. The base 3 is a cylindrical structure. The top of the base 3 is formed with an annular groove. The annular groove cooperates with the stepped outer wall surface at the bottom of the bottle body 1, so that the bottle body 1 can be assembled on the base 3. The bottle shell 2 and the base 3 are connected by threaded sealing. The bottom surface of the base 3 is a plane, which is convenient for the base 3 to be stably supported.

[0030] A rectangular groove is provided inside the base 3, and a control unit 7 is installed in the rectangular groove. A power interface 5 and a switch button 4 are also arranged on the outer wall of the base 3. The power interface 5 is used to connect to an external power source, and the switch button 4 is used to control the start and stop operation of the atomization device. An output port 6 is also arranged on the base 3. The output port 6 is connected to the adjustment module 205 of the control unit 7 by signal. The output port 6 is used to connect to the atomization motor 204 by signal. The output port 6 can transmit the speed signal of the control unit 7 to the atomization motor 204 to adjust the speed of the atomization motor 204, so as to realize the adaptive adjustment of the atomization rate according to the working conditions.

[0031] The inner diameter of the bottle shell 2 is larger than the outer diameter of the bottle body 1. The bottle body 1 is coaxially sleeved in the bottle shell 2. The open end face of the bottle body 1 is higher than the upper end face of the bottle shell 2. Two jaw grooves are provided at the inner bottom of the bottle shell 2. The jaw grooves extend in the horizontal direction of the bottle shell 2. The two jaw grooves are arranged symmetrically with the center line of the bottle shell 2 as the axis, that is, the two jaw grooves are located on both sides of the diameter direction of the bottle shell 2. Piezoelectric crystals are respectively installed in the two jaw grooves. The length of the jaw grooves is larger than the length of the piezoelectric crystal, and the height of the jaw grooves is equal to the height of the piezoelectric crystal, so that the piezoelectric crystal is restricted by the jaw grooves in the vertical direction and can only produce telescopic deformation in the horizontal direction.

[0032] The two piezoelectric crystals are defined as the first piezoelectric crystal 9 and the second piezoelectric crystal 10. The first piezoelectric crystal 9 and the second piezoelectric crystal 10 are in the shape of bars with the same size. The polarized electrodes of the first piezoelectric crystal 9 and the second piezoelectric crystal 10 are respectively welded with wires to connect the signal of the control unit 7. The first piezoelectric crystal 9 and the second piezoelectric crystal 10 are used to convert the pressure signal into an electrical signal, and transmit the converted electrical signal to the control unit 7, so that the control unit 7 detects the liquid level of the atomized liquid in the bottle 1.

[0033] Piezoelectric crystals are pressure-sensitive. When subjected to pressure in a specific direction, electric charges will flow, converting the pressure signal into an electrical signal. By utilizing the positive piezoelectric effect of the piezoelectric crystal, when the liquid level changes, the external force applied to the piezoelectric crystal changes, and the amount of charge generated changes with the change in the external force. The control unit 7 can continuously measure the liquid level in real time by detecting the change in the amount of charge. The liquid level change can be detected without direct contact with the atomized liquid, which not only avoids liquid contamination, but also extends the service life of the atomization device.

[0034] The piezoelectric constants of the first piezoelectric crystal 9 and the second piezoelectric crystal 10 are different, and the relationship between the external force on the piezoelectric crystal and the amount of charge generated is a slowly changing curve, and the speed of change is related to the size of the piezoelectric constant. By setting the first piezoelectric crystal 9 and the second piezoelectric crystal 10 with different piezoelectric constants, the relationship curves between the external force on the two piezoelectric crystals and the amount of charge generated are obtained. On the one hand, by adding the two curves, a curve with a more obvious change trend can be fitted, which has the effect of improving the sensitivity of the liquid level measurement. On the other hand, by comparing the change law of the relationship curves between the external force on the two piezoelectric crystals and the amount of charge generated, it can be determined whether the control unit 7 has a fault, making the liquid level detection more reliable.

[0035] The force amplification mechanism 19 is connected between the bottle body 1 and the piezoelectric crystal, and is used to convert the vertical gravity of the bottle body 1 into horizontal pressure on the piezoelectric crystal. The force amplification mechanism 19 includes a flat plate 13 and a connecting rod assembly. The flat plate 13 is a rectangular plate, and the flat plate 13 is fixedly assembled at the bottom of the bottle body 1. There are two connecting rod assemblies, and the two connecting rod assemblies are used to press the first piezoelectric crystal 9 and the second piezoelectric crystal 10 laterally.

[0036] The structures of the two connecting rod assemblies are the same, and only one is used as an example for explanation. The connecting rod assembly includes a connecting rod 15, a right angle iron 18, a rotating shaft 17 and a slider. The connecting rods 15 are arranged in pairs, and the connecting rods 15 arranged in pairs are parallel to each other and arranged on both sides of the flat plate 13. At the four corners of the flat plate 13, there are through holes with a diameter equal to the diameter of the through holes on the right angle iron 18. The flat plate 13 and the right angle iron 18 are connected by bolts 14. The other side of the support angle iron is hinged to the top of the connecting rod 15 by a hinge connection. The bottom end of the connecting rod 15 is provided with a through hole, and the rotating shaft 17 is rotatably assembled between the two connecting rods 15. The connecting rods 15 of the two sets of connecting rod assemblies are arranged crosswise to reduce the diameter of the bottle body 1 and the bottle shell 2 while ensuring the stroke of the connecting rod 15.

[0037] The middle part of the rotating shaft 17 is a smooth structure. External threads are provided at both axial ends of the rotating shaft 17. The external threads pass through the through holes on the connecting rod 15. Nuts 16 are screwed onto the external threads. The rotating shaft 17 is axially limited by the nuts 16. A slider is fixed on the smooth middle part of the rotating shaft 17. The slider is a rectangular column structure. The height of the slider is equal to the height of the piezoelectric crystal, and the length of the slider is greater than the length of the piezoelectric crystal. The sliders of the two groups of connecting rod assemblies are defined as the first slider 11 and the second slider 12. The first slider 11 contacts the first piezoelectric crystal 9, and the second slider 12 contacts the second piezoelectric crystal 10. The first slider 11 and the second slider 12 can slide on the inner bottom of the bottle shell 2 and press the corresponding first piezoelectric crystal 9 and second piezoelectric crystal 10 in the horizontal direction.

[0038] When the liquid level of the atomized liquid in the bottle body 1 changes, the gravity of the atomized liquid acts on the flat plate 13 of the force transmission and amplification mechanism 19. The flat plate 13 pushes the first slider 11 and the second slider 12 to move towards the left and right sides respectively through the cross-distributed connecting rods 15. The first slider 11 and the second slider 12 respectively press against one side surface of the first piezoelectric crystal 9 and the second piezoelectric crystal 10 in the horizontal direction. Since the first piezoelectric crystal 9 and the second piezoelectric crystal 10 are restricted by the clamping groove in the vertical direction, the first piezoelectric crystal 9 and the second piezoelectric crystal 10 can only expand and contract in the horizontal direction. When the first piezoelectric crystal 9 and the second piezoelectric crystal 10 are compressed and expanded, polarization phenomena occur inside them, and positive and negative charges appear on two opposite surfaces, converting the pressure signal into an electrical signal and transmitting it to the control unit 7 through wires.

[0039] Assume that the included angle between the connecting rod 15 and the horizontal plane is θ, and 0° < θ < 90°. The force exerted by the bottle body 1 and the atomized liquid in the bottle body 1 on the flat plate 13 is G. According to the force balance, the pressure exerted by the slider on the piezoelectric crystal is F = G / tanθ. Therefore, when the liquid level of the bottle body 1 changes, the force acting on the flat plate 13 of the force transmission and amplification mechanism 19 changes, and the change amount is ΔG. Then the change amount of the pressure exerted by the slider on the piezoelectric crystal is ΔF = ΔG / tanθ. Since 0 < tanθ < 1, so ΔG < ΔF. This force transmission and amplification mechanism 19 has the effect of amplifying the change amount of the force, and its amplification effect depends on the size of θ. The closer θ is to 0, the more obvious the amplification effect. In this preferred embodiment, θ = 15°.

[0040] Under the direct piezoelectric effect of the piezoelectric crystal, when it is deformed under the action of an external force in a certain direction, polarization phenomena will occur inside it, and at the same time, positive and negative charges will appear on its two opposite surfaces. When the external force is removed, it will return to the uncharged state, and the generated charge quantity is proportional to the magnitude of the force. The control unit 7 can learn about the change of the liquid level by detecting the change amount of the charges of the first piezoelectric crystal 9 and the second piezoelectric crystal 10.

[0041] The control unit 7 includes a liquid level detection module 203, a display module 201, an adjustment module 205 and a charge amplifier module. The charge amplifier module is connected between the first piezoelectric crystal 9, the second piezoelectric crystal 10 and the liquid level detection module 203, that is, the polarized electrode of the piezoelectric crystal is connected to the charge amplifier module, and then connected to the liquid level detection module 203 through the charge amplifier module. Under the positive piezoelectric effect of the piezoelectric crystal, the change in liquid level causes the pressure acting on the piezoelectric crystal to change, and the amount of charge generated by the piezoelectric crystal changes with the change in pressure. The charge amplifier module converts the weak charge change generated by the piezoelectric crystal into a voltage change proportional to it. The display module 201 is used to connect the display screen 8 on the bottle body 1 with a signal to display information such as the liquid level; the adjustment module 205 is used to connect the atomizing motor 204 with a signal to adjust the speed of the atomizing motor 204.

[0042] The liquid level detection module 203 is used to analyze the voltage transmitted by the charge amplifier module, and judge the specific liquid level of the atomized liquid in the bottle body 1 according to the voltage. When the adjustable speed atomization device starts to work, the liquid level detection module 203 of the control unit 7 only needs to detect the change curve of the charge amplifier output voltage, and then filter the external interference factors except the liquid level change through bandpass filtering, that is, to obtain the change curve of the single independent variable of "liquid level-voltage", and finally, obtain the one-to-one matching mechanism of "liquid level-voltage" under actual working conditions.

[0043] The control unit 7 is preset with preset atomization rates corresponding to different liquid levels. The preset atomization rates can be modified according to the needs of the user or the environmental requirements of the atomization device to meet the needs of different users and achieve the most appropriate control effect. The control unit 7 sets a certain actual atomization interval, and the setting of the atomization time interval can be 1s, 2s, 3s, 4s, 5s, 6s, etc. The control unit 7 detects the first liquid level and the second liquid level within the atomization time interval according to the aforementioned principle, calculates the actual atomization rate of the atomization device according to the liquid level difference between the first liquid level and the second liquid level and the atomization time interval, compares the actual atomization rate with the preset atomization rate, and transmits a speed signal to the atomization motor 204 to change the speed of the atomization motor 204, thereby adjusting the actual atomization rate.

[0044] In this embodiment, the control unit 7 adjusts the rotation speed of the atomizer motor 204 by changing the driving voltage of the atomizer motor 204. If the actual atomization rate is greater than the preset atomization rate, the control unit 7 transmits a voltage reduction signal to the atomizer motor 204 to reduce the rotation speed by reducing the driving voltage of the atomizer motor 204; if the actual atomization rate is less than the preset atomization rate, the control unit 7 transmits a pressure increase signal to the atomizer motor 204 to increase the rotation speed by increasing the driving voltage of the atomizer motor 204.

[0045] A display screen 8 is also arranged on the bottle shell 2 , and the display screen 8 is signal-connected to the display module 201 of the control unit 7 . The display screen 8 is used to receive and display the liquid level signal and atomization rate signal transmitted by the control unit 7 , and to feed back the actual rotation speed of the atomization motor 204 .

[0046] The working process of the present invention is as follows: a power cord is connected to the power interface 5, the output port 6 is connected to the atomizing motor 204, the switch button 4 is started, and the speed-adjustable atomizing device starts atomizing. The atomizing motor 204 pumps the atomized liquid mixed with air in the bottle body 1 to the external environment, and relies on the closed-loop control of "liquid level-speed of the atomizing motor 204" so that the actual atomizing rate of the atomizing device always maintains the preset atomizing rate for atomization.

[0047] When the control unit 7 detects the liquid level and adjusts the speed of the atomizing motor 204, the following steps are included:

[0048] Step 301, the operator inputs a preset atomization rate according to the use environment. The preset atomization rate can be modified according to the needs of the user or the environment where the atomization device is located to meet the needs of different users and achieve the most appropriate control effect.

[0049] Step 302, setting the atomization time interval for the control unit 7 to read the liquid level.

[0050] A certain atomization time interval is set, and the control unit 7 reads the liquid level of the mixed liquid 203 in the bottle body 1 at the beginning and end of the atomization time interval. The setting of the atomization time interval can be 1s, 2s, 3s, 4s, 6s, etc. The size of the atomization time interval determines that the closer the total actual atomization time is to the preset atomization time, the shorter the atomization time interval is, the closer it is to the preset atomization time, but the greater the amount of calculation required for the program, so a suitable atomization time interval should be selected. In the embodiment of the present invention, the atomization time interval is set to 5s.

[0051] Step 303, the control unit 7 obtains the first liquid level. The control unit 7 reads the liquid level at the beginning of the set atomization time interval as the first liquid level. When the adjustable speed atomization device just starts atomizing, the control unit 7 uses the liquid level of the mixed liquid 203 in the bottle 1 as the first liquid level.

[0052] Step 304: the control unit 7 determines whether the first liquid level is zero.

[0053] The specific judgment method is as follows: assuming that no liquid is stored in the bottle 1, the net weight of the bottle 1 is m1, and the weight of the solution stored in the bottle 1 is m2. The force acting on the end face of the force amplifying mechanism 19 perpendicular to the end face is G = (m1 + m2) g (where g is the gravity acceleration at the location of the detection device), the pressure amplification coefficient of the force amplifying mechanism 19 is λ, and the force acting on the piezoelectric crystal perpendicular to the contact surface through the force amplifying mechanism 19 is F = λ·G.

[0054] Since the piezoelectric crystal will produce thickness deformation under the action of pressure, according to the longitudinal piezoelectric effect of the piezoelectric crystal, the surface charge generated is Q = d·F (where d is the piezoelectric constant of the piezoelectric crystal). Therefore, the surface charge generated by the piezoelectric crystal is Q = d·λ·(m1+m2)·g.

[0055] As the liquid level changes (i.e., the weight of the solution stored in the bottle 1, m2, changes), the surface charge Q generated by the piezoelectric crystal also changes, and there is a one-to-one correspondence between the liquid level and the generated charge Q. When no liquid is stored in the bottle 1, the control unit 7 detects that the charge Q generated on the surface of the piezoelectric crystal is Q=d·λ·m1·g, i.e., the liquid level is zero.

[0056] Step 305a: If the first liquid level is not zero, the control unit 7 inputs a driving voltage to the atomizing motor 204 according to a preset atomizing rate, and the atomizing motor 204 matches the corresponding rotation speed and starts.

[0057] According to the atomization rate set by the user, the control unit 7 automatically matches the corresponding rotation speed of the atomization motor 204. The rotation speed of the atomization motor 204 can be achieved by controlling the driving voltage of the motor.

[0058] Step 305b: If the first liquid level is zero, the control unit 7 controls the atomizing motor 204 to stop working, and the control unit 7 reminds the user to add liquid through the display screen 8 and the alarm.

[0059] Step 306: the control unit 7 obtains the second liquid level.

[0060] The control unit 7 reads the liquid level of the mixed liquid 203 in the bottle body 1 after the atomization time interval as the second liquid level, that is, the liquid level at the end of the set atomization time interval is used as the second liquid level.

[0061] Step 307: The control unit 7 determines whether the second liquid level is zero. The determination method is the same as the determination method of the first liquid level.

[0062] Step 308a: If the second liquid level is not zero, the control unit 7 calculates the actual atomization rate according to the liquid level difference between the first liquid level and the second liquid level and the atomization time interval.

[0063] The actual atomization rate is calculated by dividing the liquid level difference between the first liquid level and the second liquid level by the time taken for the liquid level of the atomized liquid in the bottle 1 to atomize from the first liquid level to the second liquid level, that is, the set atomization time interval.

[0064] Step 308b: If the second liquid level is zero, the control unit 7 controls the atomizing motor 204 to stop working, and reminds the user to add liquid through the display screen 8 and the alarm.

[0065] Step 309 , the control unit 7 compares the actual atomization rate with the preset atomization rate, and adjusts the driving voltage of the atomization motor 204 , so that the atomization motor 204 continues to atomize at the preset atomization rate.

[0066] If the actual atomization rate is greater than the preset atomization rate, the control unit 7 transmits a voltage reduction signal to the atomization motor 204 to reduce the rotation speed by reducing the driving voltage of the atomization motor 204. If the actual atomization rate is less than the preset atomization rate, the control unit 7 transmits a pressure increase signal to the atomization motor 204 to increase the rotation speed by increasing the driving voltage of the atomization motor 204, and continues atomization when the driving voltage is adjusted.

[0067] Finally, steps 303 to 309 are repeated in sequence until the atomization is completed.

[0068] In summary, the embodiment of the present invention provides an adjustable speed atomization device, wherein the piezoelectric crystal has a pressure-sensitive characteristic, and when subjected to pressure in a specific direction, electric charge flow will be generated, and the pressure signal will be converted into an electrical signal. By utilizing the positive piezoelectric effect of the piezoelectric crystal, when the liquid level changes, the force transmission and amplification mechanism converts the gravity change of the bottle into the pressure change on the piezoelectric crystal in the horizontal direction, and amplifies the gravity change at the same time, thereby improving the measurement accuracy and sensitivity. The external force applied to the piezoelectric crystal changes, and the amount of charge generated by the piezoelectric crystal changes with the change of the external force applied. The control unit can continuously measure the liquid level in real time by detecting the change in the amount of charge, and can detect the change in the liquid level without direct contact with the atomized liquid, thereby avoiding liquid contamination and extending the service life of the atomization device. The actual atomization rate can be obtained according to the rate of change of the liquid level. After comparing the actual atomization rate with the value of the preset atomization rate, the control unit transmits a speed signal to the atomization motor, adjusts the speed of the atomization motor, and completes the closed-loop control of "liquid level-atomization motor speed", thereby realizing adaptive adjustment of the atomization rate, outputting the same solute concentration at different liquid levels, and ensuring the health of personnel.

[0069] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A speed-adjustable atomizing device, characterized in that: It comprises a seat, a bottle arranged on the seat and an atomizing motor, wherein the bottle has a receiving cavity for receiving atomized liquid, a jaw groove is provided on the seat in a horizontal direction, a piezoelectric crystal is arranged in the jaw groove, and a force amplification mechanism is arranged between the bottle and the piezoelectric crystal, wherein the force amplification mechanism is used to convert the gravity of the bottle in a vertical direction into a pressure on the piezoelectric crystal in a horizontal direction; A control unit is also arranged in the seat body, and the control unit is connected to the piezoelectric crystal signal. The piezoelectric crystal is used to transmit a pressure signal to the control unit, and the control unit is used to receive the pressure signal and determine the liquid level of the atomized liquid and the actual atomization rate; The atomizing motor is connected to the control unit by signal. The control unit is preset with a preset atomizing rate. The control unit is used to compare the actual atomizing rate with the preset atomizing rate and transmit a speed signal to the atomizing motor. The two jaw grooves are symmetrically arranged with the center line of the seat body as the axis, and the piezoelectric crystals are respectively arranged in the two jaw grooves. The piezoelectric constants of the two piezoelectric crystals are different. The force transmission amplification mechanism includes a flat plate fixed to the bottom of the bottle body, and a connecting rod assembly connected to the two piezoelectric crystals is also arranged on the flat plate. The connecting rod assembly includes a connecting rod, a rotating shaft and a slider. The flat plate is fixedly assembled at the bottom of the bottle body, the connecting rods are arranged in pairs, the top ends of the connecting rods are hinged to the connecting rods, the rotating shafts are rotatably assembled at the bottom ends of the connecting rods arranged in pairs, the sliders are fixedly assembled on the rotating shafts, and the sliders are slidably assembled on the seat body along the horizontal direction.

2. The speed-adjustable atomizing device according to claim 1, characterized in that: The connecting rods of the two connecting rod assemblies are arranged crosswise.

3. The speed-adjustable atomizing device according to claim 1 or 2, characterized in that: The seat body comprises a base and a bottle shell arranged on the base, the bottle body is sleeved in the bottle shell, the height of the bottle body is higher than the height of the bottle shell, and the jaw groove is arranged at the inner bottom of the bottle shell.

4. The speed-adjustable atomizing device according to claim 1 or 2, characterized in that: The control unit comprises a liquid level detection module and a charge amplification module, and the charge amplification module is connected between the piezoelectric crystal and the liquid level detection module.

5. The speed-adjustable atomizing device according to claim 1 or 2, characterized in that: The seat body is also provided with a display screen, which is signal-connected to the control unit and is used to receive a liquid level signal and an atomization rate signal transmitted by the control unit.

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