Patent Publication Number: US-2017354024-A1

Title: Plasma liquid generating device

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This Non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 105117873 filed in Taiwan, Republic of China on Jun. 6, 2016, the entire contents of which are hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     Field of Invention 
     The present disclosure relates to a generating device and, in particular, to a plasma liquid generating device. 
     Related Art 
     Plasma technologies have been widely applied to various industries. Most maturated plasma technologies must be carried out under the vacuum environment. However, the vacuum processes have some drawbacks such as time consuming for vacuuming, high costs for preparing and repairing the vacuum equipment, size limitation of the chamber, difficult to performing continuous processing, and etc. Recently, the atmospheric-pressure plasma technology has been introduced, and it doesn&#39;t have the above limitations. In more specific, the atmospheric-pressure plasma technology has lower costs for preparing and repairing the equipment, is capable of rapidly generating plasma, and is suitable for continuous processing. Thus, the atmospheric-pressure plasma technology has become one of the most popular topics. Besides, the atmospheric-pressure plasma technology is potential to the cosmetology and medical applications. 
     Taking cosmetology and medical applications for example, in order to restore the elasticity and glory of the skin, various kinds of cosmetology have been developed. For example, the first generation of laser technology, pulsed light, and radio waves are applied in the beauty care field. Nowadays, the plasma activation is not only for sterilization and improving skin collagens, but also re-regenerating elastic fibroblasts, thereby giving the experiencers an unprecedented new experience. However, the current plasma activation therapy can only be carried out in the medical institutions, and most people can&#39;t experience the plasma activation treatment in their daily lives. Most people can&#39;t produce plasma liquid themselves in their daily lives. 
     SUMMARY OF THE INVENTION 
     An objective of the present disclosure is to provide a plasma liquid generating device that can generate a plasma liquid in daily lives. 
     In one embodiment, the present disclosure discloses a plasma liquid generating device, which includes a plasma generating module, a driving circuit, an adjust-controlling module, and a mixing structure. The driving circuit is coupled with the plasma generating module and configured to drive the plasma generating module to generate first type plasma particles and second type plasma particles. The adjust-controlling module is coupled with the driving circuit and configured to control the driving circuit to adjust a generation proportion of the first type plasma particles and the second type plasma particles generated by the plasma generating module. The mixing structure connects with the plasma generating module and is configured to mix the first type plasma particles, the second type plasma particles and a liquid so as to produce a plasma liquid. 
     In one embodiment, the first type plasma particles are ozone, and the second type plasma particles are nitrate ions. 
     In one embodiment, the driving circuit is configured to output a driving voltage to the plasma generating module. When the driving voltage has a high frequency, the generated nitrate ions are more than the generated ozone in the generation proportion. When the driving voltage has a low frequency, the generated ozone is more than the generated nitrate ions in the generation proportion. 
     In one embodiment, the plasma liquid generating device further includes a power module configured to output a supply voltage to the driving circuit. 
     In one embodiment, the driving circuit includes a voltage frequency adjustor, a voltage convertor and a booster. The voltage frequency adjustor is configured to generate a modulated frequency according to an adjusting signal outputted from the adjust-controlling module. The voltage convertor is coupled with the power module and the voltage frequency adjustor, and configured to output the driving voltage according to the supply voltage and the modulation frequency. The booster is configured to boost the driving voltage and output the driving voltage to the plasma generating module. 
     In one embodiment, the power module includes a hydroelectric generator, and the liquid flows through the hydroelectric generator so as to enable the hydroelectric generator to output the supply voltage. 
     In one embodiment, the adjust-controlling module includes a controller such as a touch screen or a knob. 
     In one embodiment, the plasma generating module includes at least an atmospheric-pressure plasma generator, which includes a first electrode and a second electrode disposed opposite to the first electrode. 
     In one embodiment, the first electrode has a plate shape, the second electrode has at least a hole, and the first type plasma particles and the second type plasma particles flow into the mixing structure through the hole. 
     In one embodiment, the mixing structure includes a Venturi tube and an inlet and an outlet connecting to the Venturi tube, and the second electrode is disposed on the Venturi tube close to the outlet. 
     In one embodiment, the plasma generating module includes a first atmospheric-pressure plasma generator and a second atmospheric-pressure plasma generator. The first atmospheric-pressure plasma generator is configured to generate a group of plasma particles mainly containing the first type plasma particles. The second atmospheric-pressure plasma generator is configured to generate a group of plasma particles mainly containing the second type plasma particles. 
     In one embodiment, the plasma liquid generating device further includes a waterproof housing for accommodating the plasma generating module, the driving circuit and the mixing structure, and the adjust-controlling module is disposed on the waterproof housing. 
     In one embodiment, the disclosure discloses a compact automatic plasma liquid generating device, which includes at least an atmospheric-pressure plasma generator, a hydroelectric generator, a driving circuit, an adjust-controlling module, a mixing structure and a waterproof housing. The hydroelectric generator is configured to output a supply voltage based on a liquid flowing therethrough. The driving circuit is coupled with the atmospheric-pressure plasma generator. The driving circuit is configured to transform the supply voltage into a high voltage, and configured to drive the atmospheric-pressure plasma generator to generate ozone plasma particles and nitrate ion plasma particles. The adjust-controlling module is coupled with the driving circuit and configured to control the driving circuit to adjust a generation proportion of the ozone plasma particles and the nitrate ion plasma particles generated by the atmospheric-pressure plasma generator. The mixing structure connects with the atmospheric-pressure plasma generator and is configured to mix the ozone plasma particles, the nitrate ion plasma particles, and the liquid so as to produce a plasma liquid. The waterproof housing is configured for accommodating the atmospheric-pressure plasma generator, the hydroelectric generator, the driving circuit and the mixing structure, and the adjust-controlling module is disposed on the waterproof housing. 
     In one embodiment, when the high voltage has a high frequency, the generated nitrate ion plasma particles are more than the generated ozone plasma particles in the generation proportion. When the high voltage has a low frequency, the generated ozone plasma particles are more than the generated nitrate ion plasma particles in the generation proportion. 
     In one embodiment, the driving circuit includes a voltage frequency adjustor, a voltage convertor and a booster. The voltage frequency adjustor generates a modulated frequency according to an adjusting signal outputted from the adjust-controlling module. The voltage convertor is coupled with the hydroelectric generator and the voltage frequency adjustor and outputs the high voltage according to the supply voltage and the modulation frequency. The booster boosts the high voltage and outputs the high voltage to the hydroelectric generator. 
     In one embodiment, the plasma generating module includes at least an atmospheric-pressure plasma generator. The atmospheric-pressure plasma generator includes a first electrode and a second electrode, which are disposed opposite to each other. 
     In one embodiment, the first electrode has a plate shape, and the second electrode has at least a hole. The ozone plasma particles and the nitrate ion plasma particles flow into the mixing structure through the hole. 
     In one embodiment, the mixing structure includes a Venturi tube and an inlet and an outlet connecting to the Venturi tube, and the second electrode is disposed on the Venturi tube close to the outlet. 
     In one embodiment, the atmospheric-pressure plasma generator includes a first atmospheric-pressure plasma generator and a second atmospheric-pressure plasma generator. The first atmospheric-pressure plasma generator is configured to generate a group of plasma particles mainly containing the ozone plasma particles. The second atmospheric-pressure plasma generator is configured to generate a group of plasma particles mainly containing the nitrate ion plasma particles. 
     In one embodiment, an atmospheric-pressure plasma liquid generating device comprises at least an atmospheric-pressure plasma generator, a driving circuit and a mixing structure. The atmospheric-pressure plasma generator comprises an air inlet, a chamber and at least a plasma outlet. The driving circuit is coupled with the atmospheric-pressure plasma generator to drive the atmospheric-pressure plasma generator to generate plasma particles in the chamber. The mixing structure comprises a flow channel and a plasma inlet. The plasma inlet communicates with the plasma outlet and the flow channel. When a liquid flows through the flow channel, the plasma particles are sucked from the chamber through the plasma outlet and the plasma inlet to the flow channel and mixed in the liquid so as to produce a plasma liquid, and atmospheric-pressure air is sucked through the air inlet into the chamber. 
     In one embodiment, the atmospheric-pressure plasma generator comprises a first electrode and a second electrode, the first electrode is disposed opposite to the second electrode, the first electrode has a plate shape, and the second electrode has at least a hole as the plasma outlet. 
     In one embodiment, the mixing structure comprises a Venturi tube and an inlet and an outlet connecting to the Venturi tube, and the second electrode is disposed on the Venturi tube close to the outlet. 
     In one embodiment, the driving circuit is configured to output a driving voltage to the atmospheric-pressure plasma generator, and the plasma particles comprises ozone plasma particles and nitrate ion plasma particles. When the driving voltage has a high frequency, the generated nitrate ions are more than the generated ozone. When the driving voltage has a low frequency, the generated ozone is more than the generated nitrate ions. The atmospheric-pressure plasma liquid generating device further comprises an adjust-controlling module coupled with the driving circuit and configured to control the driving circuit to adjust a generation proportion of the ozone plasma particles and the nitrate ion plasma particles generated in the chamber by the atmospheric-pressure plasma generator. 
     In one embodiment, the atmospheric-pressure plasma liquid generating device further comprises a hydroelectric generator configured to output a supply voltage based on the liquid flowing therethrough. The driving circuit is coupled with the atmospheric-pressure plasma generator and the hydroelectric generator, configured to transform the supply voltage into a high voltage, and configured to drive the atmospheric-pressure plasma generator to generate the plasma particles. 
     In one embodiment, the atmospheric-pressure plasma liquid generating device further comprises a power module configured to output a supply voltage to the driving circuit. The driving circuit comprises a voltage frequency adjustor, a voltage convertor and a booster. The voltage frequency adjustor is configured to generate a modulated frequency according to an adjusting signal outputted from the adjust-controlling module. The voltage convertor is coupled with the power module and the voltage frequency adjustor and configured to output the driving voltage according to the supply voltage and the modulation frequency. The booster is configured to boost the driving voltage and output the driving voltage to the plasma generating module. 
     In one embodiment, the power module comprises a hydroelectric generator, and the liquid flows through the hydroelectric generator so as to enable the hydroelectric generator to output the supply voltage. 
     In one embodiment, the atmospheric-pressure plasma liquid generating device comprises a plurality of the atmospheric-pressure plasma generators. One of the atmospheric-pressure plasma generators is configured to generate a group of plasma particles mainly containing a first type plasma particles. Another one of the atmospheric-pressure plasma generators is configured to generate a group of plasma particles mainly containing a second type plasma particles. 
     In one embodiment, the atmospheric-pressure plasma liquid generating device further comprises a waterproof housing for accommodating the plasma generating module, the driving circuit and the mixing structure. 
     As mentioned above, in the plasma liquid generating device, the driving circuit is coupled with the plasma generating module and drives the plasma generating module to generate first type plasma particles and second type plasma particles. Besides, the adjust-controlling module is coupled with the driving circuit and controls the driving circuit to adjust a generation proportion of the first type plasma particles and the second type plasma particles generated by the plasma generating module. The mixing structure mixes the first type plasma particles, the second type plasma particles and a liquid so as to produce a plasma liquid. Accordingly, the plasma liquid generating device can generate a plasma liquid, so that the users may produce plasma liquid in their daily lives. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention will become more fully understood from the detailed description and accompanying drawings, which are given for illustration only, and thus are not limitative of the present invention, and wherein: 
         FIG. 1  is a block diagram of a plasma liquid generating device according to an embodiment; 
         FIG. 2  is another block diagram of the plasma liquid generating device according to an embodiment; 
         FIGS. 3 and 4  are schematic diagrams showing a plasma generating module and a mixing structure; 
         FIGS. 5 and 6  are schematic diagrams showing applications of the plasma liquid generating device; 
         FIG. 7  is a block diagram of another plasma liquid generating device according to an embodiment; and 
         FIG. 8  is a schematic diagram showing a plasma generating module and a mixing structure. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The embodiments of the disclosure will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements. Moreover, the drawings of all implementation are schematic, and they do not mean the actual size and proportion. The terms of direction recited in the disclosure, for example up, down, left, right, front, or rear, only define the directions according to the accompanying drawings for the convenience of explanation but not for limitation. The names of elements and the wording recited in the disclosure all have ordinary meanings in the art unless otherwise stated. Therefore, a person skilled in the art can unambiguously understand their meanings. 
       FIG. 1  is a block diagram of a plasma liquid generating device  1  according to an embodiment. 
     Referring to  FIG. 1 , the plasma liquid generating device  1  includes a plasma generating module  11 , a driving circuit  12 , an adjust-controlling module  13 , and a mixing structure  14 . In addition, the plasma liquid generating device  1  further includes a power module  15 . 
     The plasma generating module  11  includes at least one plasma generator, which can ionize the entered air Ain so as to at least generate first type plasma particles and second type plasma particles. The entered air majorly contains oxygen and nitrogen. The plasma generator can ionize the oxygen and nitrogen so as to generate a plasma containing ozone (O 3 ), nitrate ions (NO 3   − ), and the likes. To be noted, the first type plasma particles is, for example but not limited to, ozone (O 3 ), and the second type plasma particles is, for example but not limited to, nitrate ions (NO 3   − ). Ozone (O 3 ) can be utilized for sterilization, and nitrate ions (NO 3   − ) have slightly acidic for removing the stratum corneum of skin. When the water containing these types of plasma particles (ozone and nitrate ions), it can provide cosmetic and sterilization functions and can be easily used. 
     The plasma generating module  11  is carried out based on the atmospheric-pressure plasma technology, which can increase the voltage to thousands volts or more. Accordingly, the electrons in the air can collide for multiple times within a limited space so as to accumulate sufficient electricity for ionizations, thereby generating the desired plasma. The atmospheric-pressure plasma technology can generate plasma under atmospheric pressure without the vacuum chamber and pump applied in the low-pressure plasma generation technology. Thus, the atmospheric-pressure plasma technology is more economic and efficiency, so that it can be applied in the general consumer products. 
     The plasma generator is, for example, an atmospheric-pressure plasma generator based on the technology of plasma jet, dielectric barrier discharge (DBD), corona discharge, plasma torch, or the likes. In this embodiment, the plasma generator generates the plasma based on, for example but not limited to, the DBD technology. In more details, the DBD technology utilizes high voltage and introduces an isolation plate between the electrodes for stabling the plasma. 
     The driving circuit  12  is coupled with the plasma generating module  11  and drives the plasma generating module  11  to generate first type plasma particles and second type plasma particles. The adjust-controlling module  13  is coupled with the driving circuit  12  and controls the driving circuit  12  to adjust a generation proportion of the first type plasma particles and the second type plasma particles generated by the plasma generating module  11 . In other words, the user can optionally operate the adjust-controlling module  13  to adjust the settings of the driving signals (e.g. frequency, voltage, intensity or waveform) for adjusting a generation proportion of the first type plasma particles and the second type plasma particles generated by the plasma generating module  11 . Accordingly, the proportions of the plasma particles in the plasma liquid can be controlled by the user. 
     In this embodiment, the first type plasma particles are ozone (O 3 ), and the second type plasma particles are nitrate ions (NO 3   − ). The plasma generating module  11  can generate the plasma particles of different proportions based on different driving signals. That is, the user can operate the adjust-controlling module  13  to adjust the settings or parameters of the plasma generating module  11 , thereby adjusting the generation proportion of the plasma particles. For example, when the user wants to obtain a stronger sterilization function, he/she can operate the adjust-controlling module  13  to increase the proportion of ozone in the plasma particles, thereby mixing more ozone into the plasma liquid. Otherwise, when the user needs a function of removing stratum corneum, he/she can operate the adjust-controlling module  13  to increase the proportion of nitrate ions in the plasma particles, thereby mixing more nitrate ions into the plasma liquid. 
     In addition, the adjust-controlling module  13  may include a controller such as a touch screen or a knob, and the controller can individually carry out the function of the adjust-controlling module  13 . When the controller is a touch screen, the user can directly operate the touch screen to control the adjust-controlling module  13  to output the adjust signal. When the controller is a knob, the user can tune the knob to control the adjust-controlling module  13  to output the adjust signal. Then, the adjust signal is inputted to the driving circuit  12  for adjusting the settings of the driving signal. In addition, the driving circuit  12  can control the plasma generating module  11  according to the adjust signal so as to adjust a generation proportion of the first type plasma particles and the second type plasma particles. 
     The mixing structure  14  is a liquid-gas mixing structure. The mixing structure  14  connects with the plasma generating module  11  and is configured to mix the first type plasma particles, the second type plasma particles and a liquid so as to produce a plasma liquid. In this embodiment, the liquid is, for example, water. As shown in figures, water Win enters the mixing structure  14  and is then mixed with the plasma particles to form a plasma liquid. Then, the plasma liquid Wout leaves the mixing structure  14 , and the user can properly use the plasma liquid. The mixing structure  14  can introduce the gas containing the plasma particles, which are generated by the plasma generating module  11 , into the liquid. When introducing the gas into the liquid, some bubbles will be generated in the liquid. Accordingly, the plasma liquid is water containing at least two types of plasma particles and bubbles, and the user can directly use the plasma liquid for experiencing the plasma activation treatment. 
     The power module  15  is a power supply source configured to output a supply voltage to the driving circuit  12 . The power module  15  can output a DC voltage or an AC voltage. Besides, the power module  15  may further include a transformer, a frequency converter, a rectifier or an inverter depending on the required voltage. In addition, if the adjust-controlling module  13  includes an electronic component, the power module  15  can also output the supply voltage to the adjust-controlling module  13 . 
       FIG. 2  is another block diagram of the plasma liquid generating device  1  according to the embodiment. 
     In this embodiment, the power module  15  includes a hydroelectric generator  151 . Before being mixed with the plasma particles, the liquid flows through the hydroelectric generator  151  so as to enable the hydroelectric generator  151  to output the supply voltage V. In more detailed, the water Win enters the hydroelectric generator  151  and pushes the impeller of the hydroelectric generator  151  to generate electricity energy. In practice, the user can easily plug the water pipe to the inlet of the hydroelectric generator  151  and turn on the water valve, and then the water can flow into the hydroelectric generator  151  to enable the hydroelectric generator  151  to output voltage to other house equipment. For example, the hydroelectric generator  151  may output a supply voltage V (e.g. DC 12 Volts and 10 Watts) for driving the driving circuit  12  and the adjust-controlling module  13 . In different embodiments, the power module  15  may not include the hydroelectric generator  151 , but be activated by city power. 
     In addition, the plasma liquid generating device  1  further includes a housing for accommodating the plasma generating module  11 , the driving circuit  12 , the mixing structure  14  and the power module  15 . In this embodiment, the hydroelectric generator  151  is a micro electricity generator, and the plasma generating module  11  is a small-sized dielectric barrier discharge (DBD) device. The housing is a waterproof housing. Accordingly, the plasma liquid generating device  1  has a compact size and can generate electricity by itself (the external power supply is unnecessary). Thus, the plasma liquid generating device  1  can be installed in the bathroom or applied in cleaning. In this case, the adjust-controlling module  13  is disposed on the housing, and the user can directly operate it. 
     In this embodiment, the driving circuit  12  includes a voltage frequency adjustor  121 , a voltage convertor  124 , and a booster  122 . The voltage frequency adjustor  121  generates a modulated frequency f according to an adjusting signal AS outputted from the adjust-controlling module  13 . The voltage convertor  124  is coupled with the power module  15  and the voltage frequency adjustor  121 , and outputs the driving voltage (a first voltage V 1 ) according to the supply voltage V and the modulation frequency f. The booster  122  is configured to boost the driving voltage (the first voltage V 1 ) and outputting a second voltage V 2  to the plasma generating module  11 . 
     In this embodiment, the plasma generating module  11  can generate the plasma particles of different proportions according to different modulation frequencies f. The driving voltages of different frequencies can control the plasma generating module  11  to generate the first type plasma particles (O 3 ) and the second type plasma particles (NO 3   − ) of different proportions. For example, when the driving voltage (the second voltage V 2 ) has a high frequency, the content of nitrate ions is more than the content of ozone in the generating proportion of the generated plasma particles. Alternatively, when the driving voltage (the second voltage V 2 ) has a low frequency, the content of ozone is more than the content of nitrate ions in the generating proportion of the generated plasma particles. The invention is not limited thereto. 
     For example, the generated amount of ozone is not varied as the frequency of the driving voltage changes, but the amount of the ionized nitrogen increases as the frequency of the driving voltage increases. In this case, when the frequency of the driving voltage (the second voltage V 2 ) is 0.5 kHz˜5 kHz, the content of ozone is more than the content of nitrate ions in the generating proportion of the generated plasma particles. In practice, the voltage is less than 5 kV. In addition, when the frequency of the driving voltage (the second voltage V 2 ) is greater than 10 kHz, the content of nitrate ions is increased (compared with the lower frequency). When the frequency of the driving voltage is 15 kHz, the ionization rate of nitrogen is reduced. However, when the frequency of the driving voltage increases, the ionization rate of nitrogen is also increased. That is, in a higher frequency of the driving voltage (e.g. the frequency of the driving voltage is greater than 15 kHz), it is possible to generate more nitrate ions and the content of nitrate ions is more than the content of ozone. 
     In addition, the DBD technology needs high AC voltage configured to generate the desired plasma. In this embodiment, the DC-to-AC voltage convertor  124  can convert the DC supply voltage V outputted from the hydroelectric generator  151  to the AC first voltage C 1 . Then, the booster  122  boosts the first voltage V 1  to output the second voltage V 2  (high voltage) to the plasma generating module  11 . The required high voltage value of the plasma generating module  11  depends on the types of the first type plasma particles and the second type plasma particles. The operation frequency of the plasma generating module  11  is 1˜40 kHz, and the peak-to-peak voltage values can be thousands or more. 
     The adjust-controlling module  13  can output the adjusting signal AS for controlling the generating proportion of the first type plasma particles and the second type plasma particles generated by the plasma generating module  11 . Accordingly, it is possible to adjust the proportion of the first type plasma particles and the second type plasma particles mixed in water. 
       FIGS. 3 and 4  are schematic diagrams showing a plasma generating module  11  and a mixing structure  14 . 
     As shown in  FIG. 3 , the plasma generating module  11  includes a plasma generator  111  (e.g. an atmospheric-pressure plasma generator). The plasma generator  111  includes a first electrode  1111  and a second electrode  1112  disposed opposite to the first electrode  1111 . The AC voltage (driving voltage) can be inputted to the first electrode  1111  and the second electrode  1112  so as to generate a high electric field between the first electrode  1111  and the second electrode  1112 . Air can be introduced into the chamber between the first electrode  1111  and the second electrode  1112 , so that the air can be ionized in the high electric field to generate the first type plasma particles (O 3 ) and the second type plasma particles (NO 3   − ). The first electrode  1111  has a plate shape, and the second electrode  1112  has at least one hole h. In this embodiment, the second electrode  1112  is a mesh electrode having a plurality of holes h. In addition, the second electrode  1112  can fit to the shape of the mixing structure  14 , and the second electrode  1112  and the mixing structure  14  are connected to each other. The first type plasma particles and the second type plasma particles, which are generated by the plasma generator  111 , flow into the pipes of the mixing structure  14  through the holes h. Accordingly, the air inlet amount and the amount of the generated plasma can be controlled by the voltage difference between the first electrode  1111  and the second electrode  1112 , the size of the holes h, the water flow speed, and the amount of the water. 
     In this embodiment, the mixing structure  14  includes a Venturi tube  141 , an inlet  142 , and an outlet  143 . The inlet  142  and the outlet  143  are connected to the Venturi tube  141 , and the second electrode  1112  is disposed on the Venturi tube  141  close to the outlet  143 . The Venturi tube  141  also has a hole disposed close to the outlet  143  and corresponding to the holes h. Accordingly, the gas containing the first type plasma particles (O 3 ) and the second type plasma particles (NO 3   − ) can enter the Venturi tube  141  through the hole. The Venturi tube  141  can be operated based on Bernoulli&#39;s principle. When water flows into the inlet  142  and the outlet  143 , the sectional area of the pipe are changed (from large to small), so that the flow speed is increased and the pressure is decreased. This configuration can form a negative pressure around the outlet  143  for sucking the gas containing the first type plasma particles (O 3 ) and the second type plasma particles (NO 3   − ) into the Venturi tube  141  through the hole. Then, these plasma particles can be resolved in water. The amount of air entering the plasma generator  111  depends on the amount of air containing the plasma particles being sucked into the Venturi tube  141 . When the flow speed and amount of water increase, the amount of air entering into the plasma generator  111 , the amount of plasma generated by the plasma generator  111 , and the amount of air containing the plasma particles being sucked into the Venturi tube  141  are also increased. In other words, when the amount of water increases, the amounts of plasma particles and plasma liquid are also increased. 
     In addition, the plasma generating module may include a plurality of plasma generators. As shown in  FIG. 4 , the plasma generating module  11   a  includes two plasma generators  111  and  112 . The second electrodes  1112  and  1122  of the plasma generators  111  and  112  are disposed at two sides of the Venturi tube  141  close to the outlet  143 . The configuration of two plasma generators  111  and  112  can generate more plasma particles, so that the water Wout (plasma liquid) exits from the outlet  143  contains more plasma particles. 
     To be noted, an energy stone can be installed at the outlet  143  of the mixing structure  14 , so that the plasma liquid can flow through the energy stone before applying to the user. Herein, the energy stone can vibrate the water so as to turn the normal water into an active water, which has higher oxygen content. In one embodiment, the energy stone is, for example, a maifan stone, which can release minerals and absorb toxic and harmful substances, such as heavy metal ions (e.g. Pb, Hg, Cr, Cd, As), organic substances, bacteria, for purifying water. 
       FIGS. 5 and 6  are schematic diagrams showing applications of the plasma liquid generating device. 
     As shown in  FIG. 5 , in one embodiment, a pipe connecting the plasma liquid generating device  1  and the water tank  23  may pass through the wall  21 . Thus, the plasma liquid generating device  1  can be installed at indoor (e.g. in the bathroom). The water tank  23  can provide water to the plasma liquid generating device  1 . A water output structure  22  is connected to the mixing structure  14 , so that the plasma liquid generated by the plasma liquid generating device  1  can be ejected through water output structure  22  for showering or washing. Herein, the water output structure  22  is for example a microbubble shower. In practice, the microbubble shower can achieve the deep cleaning of skin and thus enhance the cosmetic and sterilization effects of the plasma liquid. 
     As shown in  FIG. 6 , the plasma liquid generating device  1  can be installed on the outlet of the water tank  23 , and the output pipe of the plasma liquid generating device  1  is disposed at any desired place. For example, if the house has three bathrooms, the output pipes can be installed to supply the plasma liquid containing the first type plasma particles (O 3 ) and the second type plasma particles (NO 3   − ) to the three bathrooms. 
       FIG. 7  is a block diagram of another plasma liquid generating device  3  according to an embodiment. 
     As shown in  FIG. 7 , the plasma liquid generating device  3  includes a plasma generating module  31 , a driving circuit  32 , an adjust-controlling module  33 , a mixing structure  34 , and a power module  35 . The technical features of the plasma generating module  31 , the driving circuit  32 , the adjust-controlling module  33 , the mixing structure  34 , and the power module  35  can be referred to the plasma generating module  11 , the driving circuit  12 , the adjust-controlling module  13 , the mixing structure  14 , and the power module  15  of the previous embodiment, so the detailed descriptions thereof will be omitted. 
     Different from the plasma liquid generating device  1 , the plasma liquid generating device  3  further includes another plasma generating module  36 , and the driving circuit  32  can individually drive the plasma generating modules  31  and  36  by the same or different driving methods. In this embodiment, the adjust-controlling module  33  can control the driving circuit  32  to output driving signals S 1  and S 2  to the plasma generating modules  31  and  36 , respectively, thereby controlling the proportions of the first type plasma particles and the second type plasma particles generated by the plasma generating modules  31  and  36 . 
     For example, the plasma generating module  31  includes at least one plasma generator (a first atmospheric-pressure plasma generator), and the plasma generating module  36  includes at least one plasma generator (a second atmospheric-pressure plasma generator). The plasma generating modules (or plasma generators) can be configured with different settings and divided into different groups. For example, the plasma generating module  31  belongs to a first group, and the plasma generating module  36  belongs to a second group. The plasma generator of the plasma generating module  31  of the first group is configured to generate more of the first type plasma particles (O 3 ), and the plasma generator of the plasma generating module  36  of the second group is configured to generate more of the second type plasma particles (NO 3   − ). Accordingly, the plasma particles generated by the plasma generating module  31  contains more nitrate ions than ozone, and the plasma particles generated by the plasma generating module  36  contains more ozone than nitrate ions. This configuration can properly control the total plasma generated by the plasma generating modules  31  and  36  and adjust the proportion of the plasma particles. 
     As mentioned above, the plasma generator can be based on the DBD technology. Herein, the plasma generating module  31  of the first group is driven by a high frequency voltage, and the plasma generating module  36  of the first group is driven by a low frequency voltage. 
     In addition, it is also possible to configure a proper catalyst to control the generation proportion of different plasma particles. In this embodiment, the plasma generating modules  31  and  36  can be configured with different catalysts, which are benefit to generate different plasma particles. For example, the plasma generator of the plasma generating module  31  of the first group is configured with a catalyst benefit to generate the first type plasma particles (O 3 ), and the plasma generator of the plasma generating module  36  of the second group is configured with another catalyst benefit to generate the second type plasma particles (NO 3   − ). 
       FIG. 8  is a schematic diagram showing a plasma generating module and a mixing structure. The plasma generating module  11  and the mixing structure  14  in  FIG. 8  is similar to the relevant elements in  FIG. 3 . In  FIG. 8 , the number of the hole  144  of the tube of the mixing structure  14  is one for example. The hole  144  acts as a plasma inlet which allows the plasma particles entering the flow channel  140  from the chamber  1113  of the plasma generator  111 . The flow channel  140  is located inside the tube of the mixing structure  14 , for example, the tube of the Venturi tube  141 . The flow channel  140  is located between the inlet  142  and the outlet  143 . 
     For example, the plasma generator  111  may be an atmospheric-pressure plasma generator, and it comprises an air inlet  1114 , a chamber  1113  and at least a hole h as a plasma outlet. Atmospheric-pressure air can enter the chamber  1113  through the air inlet  1114 . The plasma particles generated in the chamber  1113  are outputted from the plasma outlet (hole h). The plasma inlet  144  communicates with the plasma outlet (hole h) and the flow channel  140 . When the liquid flows through the flow channel  140 , the plasma particles are sucked from the chamber  1113  through the plasma outlet (hole h) and the plasma inlet  144  to the flow channel  140 , then the plasma particles are mixed in the liquid so as to produce a plasma liquid, and atmospheric-pressure air is sucked through the air inlet  1114  into the chamber  1113 . When no air contained within the chamber  1113  is sucked into the flow channel  140 , the external air also is not sucked through the air inlet  1114  into the chamber  1113 . Namely, when no liquid flows through the flow channel  140 , the air (or the air containing the plasma particles) within the chamber  1113  is not sucked into the flow channel  140 , and the external air (atmospheric-pressure air) is not sucked through the air inlet  1114  into the chamber  1113 . 
     The power source of the plasma generator  111  may be the hydroelectric generator  151 . The hydroelectric generator  151  is configured to output a supply voltage based on the liquid flowing therethrough. The driving circuit  12  is coupled with the atmospheric-pressure plasma generator  111  and the hydroelectric generator  151 , configured to transform the supply voltage into a high voltage, and configured to drive the atmospheric-pressure plasma generator  111  to generate the plasma particles. The piping or tubes of hydroelectric generator  151  and the mixing structure  14  communicate with each other. The liquid may flow through the hydroelectric generator  151  first and then flow through the mixing structure  14 . 
     When the liquid flows, the liquid not only drives the hydroelectric generator  151  to power the plasma generator  111  to generate the plasma particles, and also drives the mixing structure  14  to suck the generated plasma particles from the chamber  1113  into the flow channel  140  where the sucked plasma particles are mixed in the liquid. The external air (atmospheric-pressure air) is also sucked through the air inlet  1114  into the chamber  1113 , and then the sucked air in the chamber  1113  is ionized to generate plasma particles by the plasma generator  111 . When keeping the liquid flowing, the electric power is repeatedly generated by the hydroelectric generator  151 , the plasma particles are repeatedly generated in the chamber  1113  and sucked into the flow channel  140  by the mixing structure  14 , the sucked plasma particles are repeatedly mixed in the liquid, and the external air (atmospheric-pressure air) is repeatedly sucked through the air inlet  1114  into the chamber  1113 . 
     When no liquid flows, the hydroelectric generator  151  does not operate and does not power the plasma generator  111 , the plasma generator  111  is not powered and does not generate plasma particles, the mixing structure  14  does not suck air in the chamber  1113  into the flow channel  140 , and the external air (atmospheric-pressure air) is not sucked through the air inlet  1114  into the chamber  1113 . Therefore, when no liquid flows, no electric power is generated, no plasma particle is generated, and no air is sucked. In addition to saving electricity is also relatively safe. 
     In ordinary situation, the pressure within the chamber  1113  and the air outside the air inlet  1114  are equal to atmospheric-pressure. The generated plasma particles do not flow through the air inlet  1114  to the external. Atmospheric-pressure can be the pressure of the unpressured air in daily live and is about 1 atm for example. 
     For example, the plasma generator  111  may have only one chamber  1113  and only one air inlet  1114 . One chamber  1113  only connects one air inlet  1114 . 
     Regarding the plasma generator  111  as discussed above, the amount of air entering the chamber  1113  of the plasma generator  111  depends on the amount of air containing the plasma particles being sucked from the chamber  1113  into the mixing structure  14  (Venturi tube  141 ). When the flow speed and amount of water increase, the amount of air entering into the chamber  1113  of the plasma generator  111 , the amount of plasma generated by the plasma generator  111 , and the amount of air containing the plasma particles being sucked into the mixing structure  14  are also increased. In other words, when the amount of water increases, the amounts of plasma particles and plasma liquid are also increased. 
     Moreover, the plasma generating module  11  and the mixing structure  14  discussed above can be applied to the plasma generating module and the mixing structure in other embodiments. 
     In the above embodiments, the plasma liquid generating device  1 ,  3  may be an atmospheric-pressure plasma liquid generating device which comprises at least an atmospheric-pressure plasma generator, a driving circuit and a mixing structure in the above embodiments. The atmospheric-pressure plasma generator comprises an air inlet, a chamber and at least a plasma outlet. Atmospheric-pressure air can enter the chamber through the air inlet. The driving circuit is coupled with the atmospheric-pressure plasma generator to drive the atmospheric-pressure plasma generator to generate plasma particles in the chamber. The mixing structure comprises a flow channel and a plasma inlet. The plasma inlet communicates with the plasma outlet and the flow channel. When a liquid flows through the flow channel, the plasma particles are sucked from the chamber through the plasma outlet and the plasma inlet to the flow channel, then the plasma particles are mixed in the liquid so as to produce a plasma liquid, and atmospheric-pressure air is sucked through the air inlet into the chamber. 
     In the above embodiments, the adjust-controlling module is coupled with the driving circuit and configured to control the driving circuit to adjust a generation proportion of the plasma particles generated in the chamber by the atmospheric-pressure plasma generator. For example, a generation proportion of the ozone plasma particles and the nitrate ion plasma particles. For example, the plasma particles comprises ozone plasma particles and the nitrate ion plasma particles. When the driving voltage has a high frequency, the generated nitrate ions are more than the generated ozone. When the driving voltage has a low frequency, the generated ozone is more than the generated nitrate ions. The adjust-controlling module can be configured to adjust the frequency of the driving voltage generated by the driving circuit. 
     As mentioned above, in the plasma liquid generating device, the driving circuit is coupled with the plasma generating module and drives the plasma generating module to generate first type plasma particles and second type plasma particles. Besides, the adjust-controlling module is coupled with the driving circuit and controls the driving circuit to adjust a generation proportion of the first type plasma particles and the second type plasma particles generated by the plasma generating module. The mixing structure mixes the first type plasma particles, the second type plasma particles and a liquid so as to produce a plasma liquid. Accordingly, the plasma liquid generating device can generate a plasma liquid, so that the users may produce plasma liquid in their daily lives. 
     Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the invention.