Patent Publication Number: US-2021188050-A1

Title: Gas detection and purification device

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     This non-provisional application claims priority under 35 U.S.C. § 119(a) to Patent Application No. 108146886 filed in Taiwan, R.O.C. on Dec. 20, 2019 and Patent Application No. 109109502 filed in Taiwan, R.O.C. on Mar. 20, 2020, the entire contents of which are hereby incorporated by reference. 
     BACKGROUND 
     Technical Field 
     The present disclosure relates to a gas detection and purification device. In particular, to a gas detection and purification device suitable for being utilized in an in-car space or in an indoor space. 
     Related Art 
     At present, people pay more and more attention to monitoring ambient air quality in daily life, such as monitoring carbon monoxide, carbon dioxide, volatile organic compounds (VOC), PM2.5, etc. Moreover, even exposure to these gases can cause adverse health effects on the human body, and can even be life-threatening. Therefore, the quality of ambient air has attracted the attention of various countries. How to implement the monitoring of the quality of ambient air to prevent exposing to hazardous gases becomes a topic that is to be paid attention to. 
     For the question of how to confirm air quality, it is understood that, it is feasible to use sensors to monitor the ambient gas. Moreover, if the detection information can be provided timely to warn people in a dangerous environment, so they can avoid or escape in time from the health affecting effects and/or injuries caused by the exposure to the ambient gas, then using the sensors to monitor the surrounding environment will be a very good way. The gas detection and purification device is a solution for in-car spaces or for indoor spaces. The gas detection and purification device can detect the air quality anytime and anywhere and can provide purified air, thus being a main topic to be developed. 
     SUMMARY 
     One object of the present disclosure is providing a gas detection and purification device. The gas detection and purification device utilizes the gas detection module to detect ambient air quality in the car for the user anytime, and the gas detection and purification device provides a solution for air purification with the purification module. 
     Accordingly, with the combinational application of the gas detection module and the purification module, the gas detection and purification device prevents the user in the in-car space or in the indoor space from breathing hazardous gases, and the user in the car or the indoor space can obtain information from the device so as to have proper prevention actions according to the notified information. 
     A general embodiment of the present disclosure provides gas detection and purification device including a housing, a purification module, a gas-guiding unit, and a gas detection module. The housing has at least one gas inlet and at least one gas outlet, and a gas channel is disposed between the at least one gas inlet and the at least one gas outlet. The purification module is disposed in the gas channel so as to filter a gas guided into the gas channel. The gas-guiding unit is disposed in the gas channel and is disposed at one side of the purification module. The gas-guiding unit guides the gas into the gas detection and purification device from the at least one gas inlet, guides the gas to pass through the purification module for performing filtering and purifying, and discharges the gas from the at least one gas outlet into an environment outside the gas detection and purification device. The gas detection module is disposed in the gas channel. The gas detection module includes a control circuit board, a gas detection main body, a microprocessor, a communication device, a power unit, and a battery. The gas detection module is provided for detecting the gas guided into the housing to obtain gas detection data. The gas detection module performs a computation processing to the gas detection data obtained by the gas detection module so as to control the gas-guiding unit to start or to stop operation. When the gas-guiding unit is in operation, the gas-guiding unit guides the gas into the gas detection and purification device from the at least one gas inlet, guides the gas to pass through the purification module for performing filtering and purifying, and discharges the gas from the at least one gas outlet into the environment outside the gas detection and purification device to obtain a purified gas, whereby the gas detection and purification device provides a user with the purified gas. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure will become more fully understood from the detailed description given herein below for illustration only, and thus not limitative of the disclosure, wherein: 
         FIG. 1A  illustrates a schematic perspective view of a gas detection and purification device according to an exemplary embodiment of the present disclosure; 
         FIG. 1B  illustrates a schematic perspective view of a gas detection and purification device according to another exemplary embodiment of the present disclosure; 
         FIG. 2A  illustrates a cross-sectional view of the filtering unit of the purification module of the gas detection and purification device according to an exemplary embodiment of the present disclosure; 
         FIG. 2B  illustrates a cross-sectional view showing that the purification module includes the filtering unit of  FIG. 2A  and a photocatalyst unit, according to an exemplary embodiment of the present disclosure; 
         FIG. 2C  illustrates a cross-sectional view showing that the purification module includes the filtering unit of  FIG. 2A  and a photo plasma unit, according to an exemplary embodiment of the present disclosure; 
         FIG. 2D  illustrates a cross-sectional view showing that the purification module includes the filtering unit of  FIG. 2A  and a negative ion unit, according to an exemplary embodiment of the present disclosure; 
         FIG. 2E  illustrates a cross-sectional view showing that the purification module includes the filtering unit of  FIG. 2A  and a plasma unit, according to an exemplary embodiment of the present disclosure, according to an exemplary embodiment of the present disclosure; 
         FIG. 3A  illustrates a front exploded view of the gas-guiding unit of the gas detection and purification device in which the gas-guiding unit is an actuation pump of the exemplary embodiment; 
         FIG. 3B  illustrates a rear exploded view of the gas-guiding unit of the gas detection and purification device in which the gas-guiding unit is an actuation pump of the exemplary embodiment; 
         FIG. 4A  illustrates a cross-sectional view of the actuation pump of the gas detection and purification device of the exemplary embodiment; 
         FIG. 4B  illustrates a cross-sectional view of the actuation pump of the gas detection and purification device according to another exemplary embodiment of the present disclosure; 
         FIG. 4C  to  FIG. 4E  illustrate schematic cross-sectional views showing the actuation pump of the gas detection and purification device shown in  FIG. 4A  at different operation steps; 
         FIG. 5A  illustrates a schematic perspective view of the gas detection module of the gas detection and purification device of the exemplary embodiment; 
         FIG. 5B  illustrates a schematic perspective view of the gas detection main body of the gas detection module shown in  FIG. 5A ; 
         FIG. 5C  illustrates an exploded view of the gas detection main body of the gas detection module shown in  FIG. 5A ; 
         FIG. 6A  illustrates a schematic perspective view of the base of the gas detection main body of the gas detection and purification device of the exemplary embodiment; 
         FIG. 6B  illustrates a schematic perspective view of the base of the gas detection main body of the gas detection and purification device of the exemplary embodiment, from another perspective; 
         FIG. 7  illustrates a schematic perspective view showing that the laser component and the particulate sensor are received in the base of the gad detection main body of the exemplary embodiment; 
         FIG. 8A  illustrates an exploded view showing that the piezoelectric actuator is to be assembled with the base of the gas detection main body of the exemplary embodiment; 
         FIG. 8B  illustrates a schematic perspective view showing that the piezoelectric actuator is assembled with the base of the gas detection main body of the exemplary embodiment; 
         FIG. 9A  illustrates an exploded view of the piezoelectric actuator of the gas detection main body of the exemplary embodiment; 
         FIG. 9B  illustrates an exploded view of the piezoelectric actuator of the gas detection main body of the exemplary embodiment, from another perspective; 
         FIG. 10A  illustrates a schematic cross-sectional view showing that the piezoelectric actuator of the gas detection main body is assembled with the gas-guiding component loading region of the exemplary embodiment; 
         FIG. 10B  and  FIG. 10C  illustrate schematic cross-sectional views showing the piezoelectric actuator shown in  FIG. 10A  at different operation steps; 
         FIG. 11A  to  FIG. 11C  illustrate schematic cross-sectional views showing the gas paths of the gas detection main body of the exemplary embodiment; 
         FIG. 12  illustrates a schematic cross-sectional view showing the laser beams emitted by the laser component of the gas detection main body of the exemplary embodiment; and 
         FIG. 13  illustrates a block diagram showing the relationships between the control circuit board and other components of the gas detection and purification device of the exemplary embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     The present disclosure will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of different embodiments of this disclosure are presented herein for purpose of illustration and description only, and it is not intended to limit the scope of the present disclosure. 
     Please refer to  FIG. 1A ,  FIG. 1B , and  FIG. 2A . A gas detection and purification device is provided and includes a housing  1 , a purification module  2 , a gas-guiding unit  3 , and a gas detection module  4 . Concerning the portability of the device, the housing  1  has a size suitable for being held and carried. Therefore, the bottom portion of the housing  1  may be of a round cylinder structure (as shown in  FIG. 1A ) or of a rectangular cylinder structure (as shown in  FIG. 1B ). Moreover, in the case that the bottom of the housing  1  is of a round cylinder structure, the diameter D of the housing  1  is in a range between 40 mm and 120 mm, and preferably the diameter D of the housing  1  may be 80 mm; the height H of the housing  1  is in a range between 40 mm and 300 mm, and preferably the height of the housing  1  may be 200 mm. While in the case that the bottom of the housing  1  is of a rectangular cylinder structure, the length L of the housing  1  is in a range between 40 mm and 120 mm, and preferably the length L of the housing  1  may be 80 mm; the width W of the housing  1  is in a range between 40 mm and 120 mm, and preferably the width W of the housing  1  may be 80 mm; the height H of the housing  1  is in a range between 100 mm and 300 mm, and preferably the height H of the housing  1  may be 200 mm. Accordingly, the housing  1  is portable and can be placed in an in-car receiving space (not shown). Furthermore, the in-car receiving space may be one of a cup holder, a central console box, a trim platform near a front windshield, and a trim platform near a rear windshield. Alternatively, the housing  1  may be embedded in an in-car space (not shown). Furthermore, the in-car space may be one of a speaker, an air conditioner outlet, a car door trim, an in-car trim, a seat, a headlining, a steering wheel, a receiving box, a rearview mirror, a sun visor, and a central console box. In a further option, the housing  1  may be portable and placed in an in-door space, and the housing  1  of the device is aimed at the user for performing gas detection and purification process for the user. 
     Moreover, the housing  1  has at least one gas inlet  11  and at least one gas outlet  12 . In this embodiment, the housing  1  has a gas inlet  11  and a gas outlet  12 , but embodiments are not limited thereto, and a gas channel  13  is disposed between the gas inlet  11  and the gas outlet  12 . The purification module  2  is disposed in the gas channel  13  so as to filter a gas guided into the gas channel  13 . The gas-guiding unit  3  is disposed in the gas channel  13  and is disposed at one side of the purification module  2 . The gas-guiding unit  3  guides the gas into the gas detection and purification device from the gas inlet  11 , guides the gas to pass through the purification module  2  for performing filtering and purifying, and discharges the gas from the gas outlet  12  into an environment outside the gas detection and purification device. The gas detection module  4  is disposed in the gas channel  13 . The gas detection module  4  is provided for detecting the gas guided into the housing  1  to obtain gas detection data. Accordingly, the gas detection module  4  performs a computation processing to the obtained gas detection data so as to control the gas-guiding unit  3  to start or to stop operation. When the gas-guiding unit  3  is in operation, the gas-guiding unit  3  guides the gas into the gas detection and purification device from the gas inlet  11 , guides the gas to pass through the purification module  2  for performing filtering and purifying, and discharges the gas from the gas outlet  12  into the environment outside the gas detection and purification device to obtain a purified gas. Hence, the purified gas is obtained and the gas detection and purification device provides the user with the purified gas. Accordingly, the gas detection and purification device can be placed in the in-car receiving space, in the in-car space, or in the indoor space, and the gas detection and purification device can be provided for detecting ambient air quality in the car or in the indoor space any time, and the gas detection and purification device uses the purification module to provide a solution for air purification in the in-car space or indoor space and prevents the user in the space from breathing hazardous gases. 
     The purification module  2  is disposed in the gas channel  13 , and the purification module  2  may have several embodiments. For example, as shown in  FIG. 2A , in this embodiment, the purification module  2  is a filtering unit  2   a . The gas is controlled and guided into the gas channel  13  by the gas-guiding unit  3 , and the chemical smog, bacteria, dusts, particles, and pollens in the gas are absorbed by the filtering unit  2   a , so that the purification module  2  provides a filtering and purifying function for the gas guiding therethrough. The filtering unit  2   a  may be one of an electrostatic filter, an activated carbon filter, and a high-efficiency particulate air (HEPA) filter. Furthermore, in some embodiments, a purifying factor layer having chlorine dioxide (e.g., AMS) is coated on the filtering unit  2   a  for suppressing viruses and bacteria in the gas. Accordingly, the suppression rate for influenza A virus, influenza B virus, Enterovirus, and Norovirus exceeds 99%, thereby allowing the reduction of the cross infections of the viruses. In some other embodiments, a herbal protection coating layer consisting of  Rhus chinensis  Mill extracts from Japan and  Ginkgo biloba  extracts may be coated on the filtering unit  2   a  to form a herbal protection anti-allergy filter. Hence, the herbal protection anti-allergy filter can efficiently perform anti-allergy function and destroy cell surface proteins of influenza viruses (e.g., influenza virus subtype H1N1) passing through the herbal protection anti-allergy filter. In some other embodiments, a layer of silver ions may be coated on the filtering unit  2   a  for suppressing viruses and bacteria in the gas. 
     As shown in  FIG. 2B , the purification module  2  may be a combination consisting of the filtering unit  2   a  and a photocatalyst unit  2   b . The photocatalyst unit  2   b  includes a photocatalyst  21   b  and an ultraviolet light  22   b . The photocatalyst  21   b  and the ultraviolet light  22   b  are respectively disposed in the gas channel  13  by a spacing. The gas is guided into the gas channel  13  by the control of the gas-guiding unit  3 , and the photocatalyst  21   b  is excited under illumination of the ultraviolet light  22   b  to convert the luminous energy into chemical energy, thereby degrading hazardous gases in the gas and sterilizing the gas. Accordingly, the gas guided into the gas detection and purification device is filtered and purified by the purification module  2 . 
     As shown in  FIG. 2C , the purification module  2  may be a combination consisting of the filtering unit  2   a  and a photo plasma unit  2   c . The photo plasma unit  2   c  includes a nanometer optical tube  21   c , and the nanometer optical tube  21   c  is disposed in the gas channel  13 . The gas is guided into the gas channel  13  by the control of the gas-guiding unit  3 , and the gas is illuminated by the light of the nanometer optical tube  21   c , so that the oxygen molecules and water molecules are degraded to form high oxidative photo plasma, thereby forming an plasma stream capable of destroying organic molecules. Accordingly, volatile organic compounds such as formaldehyde and toluene in the gas can be degraded into water and carbon dioxide. Thus, the gas guided into the gas detection and purification device can be filtered and purified by the purification module  2 . 
     As shown in  FIG. 2D , the purification module  2  may be a combination consisting of the filtering unit  2   a  and a negative ion unit  2   d . The negative ion unit  2   d  includes at least one electrode wire  21   d , at least one dust-collecting plate  22   d , and a boost power supply  23   d . The electrode wire  21   d  and the dust-collecting plate  22   d  are disposed in the gas channel  13 . The boost power supply  23   d  provides the electrode wire  21   d  with high voltage electricity. The dust-collecting plate  22   d  has negative ions thereon. Therefore, upon the gas is guided into the gas channel  13  by the control of the gas-guiding unit  3 , the electrode wire  21   d  discharges electricity under a high voltage, so that particulates having positive ions in the gas are adhered on the dust-collecting plate  22   d  having negative ions. Accordingly, the gas guided into the gas detection and purification device is filtered and purified by the purification module  2 . 
     As shown in  FIG. 2E , the purification module  2  may be a combination consisting of the filtering unit  2   a  and a plasma unit  2   e . The plasma unit  2   e  includes an electric-field first protection mesh  21   e , an absorbing mesh  22   e , a high-voltage discharge electrode  23   e , an electric-field second protection mesh  24   e , and a boost power supply  25   e . The electric-field first protection mesh  21   e , the absorbing mesh  22   e , and the electric-field second protection mesh  23   e  are disposed in the gas channel  13 , and the absorbing mesh  22   e  and the high-voltage discharge electrode  23   e  are located between the electric-field first protection mesh  21   e  and the electric-field second protection mesh  24   e . The boost power supply  25   e  provides the high-voltage discharge electrode  23   e  with a high voltage so as to generate a high-voltage plasma column. Therefore, upon the gas is guided into the gas channel  13  by the control of the gas-guiding unit  3 , the oxygen molecules and the water molecules in the gas are ionized to form cations (H + ) and anions (O 2   − ). After substances which are among the ions and attached by water molecules are attached on the surfaces of viruses and the surfaces of bacteria, the water molecules are converted into oxidative oxygen ions (hydroxyl ions, OH −  ions), and the oxidative oxygen ions take away the hydrogen ions of the proteins on the surfaces of the viruses and the bacteria to degrade the viruses and the bacteria. Accordingly, the gas guided into the gas detection and purification device is filtered and purified by the purification module  2 . 
     The aforementioned gas-guiding unit  3  may be a fan, for example, may be a vortex fan, a centrifugal fan, or the like. Alternatively, as shown in  FIG. 3A ,  FIG. 3B ,  FIG. 4A , and  FIG. 4B , the gas-guiding unit  3  may be an actuation pump  30 . The actuation pump  30  is sequentially stacked by an inlet plate  301 , a resonance sheet  302 , a piezoelectric actuator  303 , a first insulation sheet  304 , a conductive sheet  305 , and a second insulation sheet  306 . The inlet plate  301  has at least one inlet hole  301   a , at least one convergence channel  301   b , and a convergence chamber  301   c . The inlet hole  301   a  is used to guide the gas outside the actuation pump  30  to flow therein. The inlet hole  301   a  correspondingly penetrates the convergence channel  301   b , and the convergence channel  301   b  is converged at the convergence chamber  301   c , so that the gas guided from the inlet hole  301   a  can be converged at the convergence chamber  301   c . In this embodiment, the number of the inlet holes  301   a  and the number of the convergence channels  301   b  are the same. Moreover, in this embodiment, the number of the inlet holes  301   a  and the number of the convergence channels  301   b  are respectively four, but not limited thereto. The four inlet holes  301   a  respectively penetrate the four convergence channels  301   b , and the four convergence channels  301   b  are converged at the convergence chamber  301   c.    
     Please refer to  FIG. 3A ,  FIG. 3B , and  FIG. 4A . The resonance sheet  302  may be assembled on the inlet plate  301  by attaching. Furthermore, the resonance sheet  302  has a perforation  302   a , a movable portion  302   b , and a fixed portion  302   c . The perforation  302   a  is located at a center portion of the resonance sheet  302  and corresponds to the convergence chamber  301   c  of the inlet plate  301 . The movable portion  302   b  is disposed at a periphery of the perforation  302   a  and is disposed at a portion opposite to the convergence chamber  301   c . The fixed portion  302   c  is disposed at an outer periphery of the resonance sheet  302  and attached to the inlet plate  301 . 
     Please still refer to  FIG. 3A ,  FIG. 3B , and  FIG. 4A . The piezoelectric actuator  303  includes a suspension plate  303   a , an outer frame  303   b , at least one supporting element  303   c , a piezoelectric element  303   d , at least one gap  303   e , and a protruding portion  303   f  In the embodiments of the present disclosure, the suspension plate  303   a  is in square shape. It is understood that, the reason why the suspension plate  303   a  adopts the square shape is that, comparing with a circle suspension plate having a diameter equal to the side length of the square suspension plate  303   a , the square suspension plate  303   a  has an advantage of saving electricity. The power consumption of a capacitive load operated at a resonance frequency may increase as the resonance frequency increases, and since the resonance frequency of a square suspension plate  303   a  is much lower than that of a circular suspension plate, the power consumption of the square suspension plate  303   a  is relatively low as well. Consequently, the square design of the suspension plate  303   a  used in one or some embodiments of the present disclosure has the benefit of power saving. In the embodiments of the present disclosure, the outer frame  303   b  is disposed around the periphery of the suspension plate  303   a . The at least one supporting element  303   c  is connected between the suspension plate  303   a  and the outer frame  303   b  to provide a flexible support for the suspension plate  303   a . In the embodiments of the present disclosure, the piezoelectric element  303   d  has a side length, which is shorter than or equal to a suspension plate side length of the suspension plate  303   a . The piezoelectric element  303   d  is attached to a surface of the suspension plate  303   a  so as to drive the suspension plate  303   a  to bend and vibrate when the piezoelectric element  303   d  is applied with a voltage. The at least one gap  303   e  is formed among the suspension plate  303   a , the outer frame  303   b , and the at least one connecting element  303   c , and the at least one gap  303   e  is provided for the gas to flow therethrough. The protruding portion  303   f  is disposed on a surface of the suspension plate  303   a  opposite to the surface of the suspension plate  303   a  where the piezoelectric element  303   d  is attached. In this embodiment, the protruding portion  303   f  may be a convex structure protruding out from and integrally formed with the surface of the suspension plate  303   a  opposite to the surface of the suspension plate  303   a  where the piezoelectric element  303   d  is attached by performing an etching process on the suspension plate  303   a.    
     Please still refer to  FIG. 3A ,  FIG. 3B , and  FIG. 4A . The inlet plate  301 , the resonance plate  302 , the piezoelectric actuator  303 , the first insulation plate  304 , the conductive plate  305 , and the second insulation plate  306  are sequentially stacked and assembled. A chamber space  307  needs to be formed between the suspension plate  303   a  and the resonance plate  302 . The chamber space  307  can be formed by filling a material between the resonance plate  302  and the outer frame  303   b  of the piezoelectric actuator  303 , such as conductive adhesive, but not limited thereto. By filling a material between the resonance plate  302  and the suspension plate  303   a , a certain distance can be maintained between the resonance plate  302  and the suspension plate  303   a  to form the chamber space  307 , by which the gas can be guided to flow more quickly. Further, since an appropriate distance is maintained between the suspension plate  303   a  and the resonance plate  302 , the interference raised by the contact between the suspension plate  303   a  and the resonance plate  302  can be reduced, so that the generation of noise can be decreased as well. In other embodiments, the needed thickness of the conductive adhesive between the resonance plate  302  and the outer frame  303   b  of the piezoelectric actuator  303  can be decreased by increasing the height of the outer frame  303   b  of the piezoelectric actuator  303 . Accordingly, during the forming process at the hot pressing temperature and the cooling temperature, the situation that the actual spacing of the chamber space  307  being affected by the thermal expansion and contraction of the conductive adhesive can be avoided, thereby decreasing the indirect effect of the hot pressing temperature and the cooling temperature of the conductive adhesive on the entire structure of the actuation pump  30 . Moreover, the height of the chamber space  307  also affects the transmission efficiency of the actuation pump  30 . Therefore, it is important that a fixed height of the chamber space  307  should be maintained for the purpose of achieving stable transmission efficiency with the actuation pump  30 . 
     Therefore, as shown in  FIG. 4B , in other embodiments of the piezoelectric actuator, the suspension plate  303   a  can be extended out by a certain distance by stamping. The extension distance can be adjusted by at least one supporting element  303   c  between the suspension plate  303   a  and the outer frame  303   b  so as to make the surface of the protruding portion  303   f  on the suspension plate  303   a  be not coplanar with the surface of the outer frame  303   b . A few amount of filling material (such as the conductive adhesive) is applied on the assembly surface of the outer frame  303   b , and the piezoelectric actuator  303  is assembled to the resonance plate  302  by attaching the piezoelectric actuator  303  onto the fixed portion  302   c  of the resonance plate  302  through hot pressing. By stamping the suspension plate  303   a  of the piezoelectric actuator  303  to form the chamber space  307 , the chamber space  307  can be obtained by directly adjusting the extension distance of the suspension plate  303   a  of the piezoelectric actuator  303 , which effectively simplifies the structural design of the chamber space  307 , and also simplifies the manufacturing process and shortens the manufacturing time of the chamber space  307 . Moreover, the first insulation plate  304 , the conductive plate  305 , and the second insulation plate  306  are all thin sheets with a frame like structure, and the first insulation plate  304 , the conductive plate  305 , and the second insulation plate  306  are sequentially stacked and assembled on the piezoelectric actuator  303  to form the main structure of the actuation pump  30 . 
     In order to understand the operation steps of the aforementioned actuation pump  30  in transmitting gas, please refer to  FIG. 4C  to  FIG. 4E . Please refer to  FIG. 4C  first, the piezoelectric element  303   d  of the piezoelectric actuator  303  deforms after being applied with a driving voltage, and the piezoelectric element  303   d  drives the suspension plate  303   a  to move downwardly and to move away from the inlet plate  301 . Thus, the volume of the chamber space  307  is increased and a negative pressure is generated inside the chamber space  307 , thereby drawing the gas in the convergence chamber  301   c  into the chamber space  307 . At the same time, owing to the resonance effect, the resonance sheet  302  moves downwardly is bent downwardly and away from the inlet plate  301  correspondingly, which also increases the volume of the convergence chamber  301   c . Furthermore, since the gas inside the convergence chamber  301   c  is drawn into the chamber space  307 , the convergence chamber  301   c  is in a negative pressure state as well. Therefore, the gas can be drawn into the convergence chamber  301   c  through the inlet hole  301   a  and the convergence channel  301   b . Then, please refer to  FIG. 4D . The piezoelectric element  303   d  drives the suspension plate  303   a  to move upwardly to move toward the inlet plate  301 , thereby compressing the chamber space  307 . Similarly, since the resonance sheet  302  resonates with the suspension plate  303   a , the resonance sheet  302  also moves upwardly and moves toward the inlet plate  301 , thereby pushing the gas in the chamber space  307  to be transmitted out of the actuation pump  30  through the at least one gap  303   e  so as to achieve gas transmission. Last, please refer to  FIG. 4E . When the suspension plate  303   a  moves resiliently to its original position, the resonance sheet  302  still moves downwardly and moves away from the inlet plate  301  due to its inertia momentum. At the time, the resonance sheet  302  compresses the chamber space  307 , so that the gas in the chamber space  307  is moved toward the gap  303   e  and the volume of the convergence chamber  301   c  is increased. Accordingly, the gas can be drawn into the convergence chamber  301   c  continuously through the inlet holes  301   a  and the convergence channels  301   b  and can be converged at the convergence chamber  301   c . By continuously repeating the operation steps of the actuation pump  30  shown in  FIG. 4C  to  FIG. 4E , the actuation pump  30  can make the gas continuously enter into the flow paths formed by the inlet plate  301  and the resonance sheet  302  from the inlet holes  301   a , thereby generating a pressure gradient. The gas is then transmitted outward through the gap  303   e . As a result, the gas can flow at a relatively high speed, thereby achieving the effect of gas transmission of the actuation pump  30 . 
     Furthermore, as shown in  FIG. 5A to 5C ,  FIG. 6A  and  FIG. 6B ,  FIG. 7 ,  FIG. 8A  and  FIG. 8B  as well as  FIG. 13 , the gas detection module  4  includes a control circuit board  4   a , a gas detection main body  4   b , a microprocessor  4   c , a communication device  4   d , a power unit  4   e , and a battery  4   f  The gas detection main body  4   b , the microprocessor  4   c , the communication device  4   d , and the power unit  4   e  are packaged with the control circuit board  4   a , so that the gas detection main body  4   b , the microprocessor  4   c , the communication device  4   d , and the power unit  4   e  are integrated with and electrically connected to the control circuit board  4   a . The power unit  4   e  is used to provide power for operating the gas detection main body  4   b , such that the gas detection main body  4   b  detects the guided gas inside the housing  1  so as to obtain gas detection data, and the power unit  4   e  is electrically connected to the battery  4   f  for obtaining the power. The microprocessor  4   c  receives the gas detection data to perform a computation processing to the gas detection data, and the microprocessor  4   c  controls the gas-guiding unit  3  to start or to stop operation for performing the operation of gas purification. The communication device  4   d  receives the gas detection data from the microprocessor  4   c  for transmitting the gas detection data to an external device  5 , so that the external device  5  obtains information and a notification alert of the gas detection data. The external device  5  may be a mobile device, a cloud processing device, a computer device, or the like. The communication device  4   d  may perform the external communication transmission through wired communication transmission, for example, through USB interface connection to perform the communication transmission. Alternatively, the communication device  4   d  may perform the external communication transmission through wireless communication transmission, for example, through Wi-Fi communication transmission, Bluetooth communication transmission, wireless radio frequency identification (RFID) communication transmission, a near-field communication (NFC) transmission, or the like. 
     Further, as shown in  FIG. 5A to 5C ,  FIG. 6A  and  FIG. 6B ,  FIG. 7 ,  FIG. 8A  to  FIG. 8C ,  FIG. 9A  and  FIG. 9B  as well as  FIG. 11A  to  FIG. 11C , the gas detection main body  4   b  includes a base  41 , a piezoelectric actuation element  42 , a driving circuit board  43 , a laser component  44 , a particulate sensor  45 , and an outer cap  46 . The base  41  has a first surface  411 , a second surface  412 , a laser configuration region  413 , a gas inlet groove  414 , a gas-guiding component loading region  415 , and a gas outlet groove  416 . The first surface  411  and the second surface  412  are opposite surfaces. The laser configuration region  413  hollowed out from the first surface  411  to the second surface  412 . Moreover, the outer cap  46  covers the base  41 , and the outer cap  46  has a side plate  461 . The side plate  461  has a gas inlet opening  461   a  and a gas outlet opening  461   b . The gas inlet groove  414  is recessed from the second surface  412  and located adjacent to the laser configuration region  413 . The gas inlet groove  414  has a gas inlet through hole  414   a  and two lateral walls. The gas inlet through hole  414   a  is in communication with outside of the base  41  and corresponds to the gas inlet opening  461   a  of the outer cap  46 . A light permissive window  414   b  is opened on the lateral wall of the gas inlet groove  414  and is in communication with the laser configuration region  413 . Therefore, the first surface  411  of the base  41  is covered by the outer cap  46 , and the second surface  412  of the base  41  is covered by the driving circuit board  43 , so that the gas inlet groove  414  and the driving circuit board  43  together define a gas inlet path (as shown in  FIG. 7  and  FIG. 11A ). 
     Furthermore, as shown in  FIG. 6A  and  FIG. 6B , the gas-guiding component loading region  415  is recessed from the second surface  412  and in communication with the gas inlet groove  414 . A gas flowing hole  415   a  penetrates a bottom surface of the gas-guiding component loading region  415 . The gas outlet groove  416  has a gas outlet through hole  416   a , and the gas outlet through hole  416   a  corresponds to the gas outlet opening  461   b  of the outer cap  46 . The gas outlet groove  416  includes a first region  416   b  and a second region  416   c . The first region  416   b  is recessed from a portion of the first surface  411  corresponding to a vertical projection region of the gas-guiding component loading region  415 . The second region  416   c  is at a portion extended from a portion not the vertical projection region of the gas-guiding component loading region  415 , and the second region  416   c  is hollowed out from the first surface  411  to the second surface  412  in a region where the first surface  411  is not aligned with the gas-guiding component loading region  415 . The first region  416   b  is connected to the second region  416   c  to form a stepped structure. Moreover, the first region  416   b  of the gas outlet groove  416  is in communication with the gas flowing hole  415   a  of the gas-guiding component loading region  415 , and the second region  416   c  of the gas outlet groove  416  is in communication with the gas outlet through hole  416   a . Therefore, when the first surface  411  of the base  41  is covered by the outer cap  46  and the second surface  412  of the base  41  is covered by the driving circuit board  43 , the gas outlet groove  416 , the outer cap  46 , and the driving circuit board  43  together define a gas outlet path (as shown in  FIG. 7  and  FIG. 11 ). 
     Furthermore, as shown in  FIG. 5C  and  FIG. 7 , the laser component  44  and the particulate sensor  45  are disposed on the driving circuit board  43  and located in the base  41 . Here, in order to clearly explain the positions of the laser component  44 , the particulate sensor  45 , and the base  41 , the driving circuit board  43  is not illustrated in  FIG. 7 . Please refer to  FIG. 5C ,  FIG. 6B , and  FIG. 7 . The laser component  44  is received in the laser configuration region  413  of the base  41 . The particulate sensor  45  is received in the gas inlet groove  414  of the base  41  and aligned with the laser component  44 . Moreover, the laser component  44  corresponds to the light permissive window  414   b . The light permissive window  414   b  allows the light beam emitted by the laser component  44  to pass therethrough, so that the light beam further enters into the gas inlet groove  414 . The path of the light beam emitted by the laser component  44  passes through the light permissive window  414   b  and is orthogonal to the gas inlet groove  414 . The light beam emitted by the laser component  44  enters into the gas inlet groove  414  through the light permissive window  414   b , and the particulate matters in the gas in the gas inlet groove  414  is illuminated by the light beam. When the light beam encounters the particulate matters, the light beam scatters to generate light spots. Hence, the particulate sensor  45  which is at a portion of the gas inlet groove  414  where the path of the light beam emitted by the laser component  44  is orthogonal to receives and calculates the light spots generated by the scattering, such that the particulate sensor  45  obtains the particle size and the concentration of the particulate matters in the gas and other related information. The particulate matters may include viruses and bacteria. The particulate sensor  45  may be a PM2.5 sensor. 
     Furthermore, as shown in  FIG. 8A  and  FIG. 8B , the piezoelectric actuation element  42  is received in the gas-guiding component loading region  415  of the base  41 . The gas-guiding component loading region  415  is a square, and each of four corners of the gas-guiding component loading region  415  has a positioning bump  415   b . The piezoelectric actuation element  42  is disposed in the gas-guiding component loading region  415  through the four positioning bumps  415   b . Furthermore, as shown in  FIG. 6A ,  FIG. 6B ,  FIG. 11B , and  FIG. 11C , the gas-guiding component loading region  415  is in communication with the gas inlet groove  414 . When the piezoelectric actuation element  42  operates, the gas in the gas inlet groove  414  is drawn into the piezoelectric actuation element  42 , and the gas passes through the gas flowing hole  415   a  of the gas-guiding component loading region  415  and enters into the gas outlet groove  416 . 
     Furthermore, as shown in  FIG. 5B  and  FIG. 5C , the driving circuit board  43  covers the second surface  412  of the base  41 . The laser component  44  is disposed on the driving circuit board  43  and electrically connected to the driving circuit board  43 . The particulate sensor  45  is also disposed on the driving circuit board  43  and electrically connected to the driving circuit board  43 . As shown in  FIG. 5B , when the outer cap  46  covers the base  41 , the gas inlet opening  461   a  corresponds to the gas inlet through hole  414   a  of the base  41  (as shown in  FIG. 11A ), and the gas outlet opening  461   b  corresponds to the gas outlet through hole  416   a  of the base  41  (as shown in  FIG. 11C ). 
     Please refer to  FIG. 9A  and  FIG. 9B . The piezoelectric actuation element  42  includes a nozzle plate  421 , a chamber frame  422 , an actuation body  423 , an insulation frame  424 , and a conductive frame  425 . The nozzle plate  421  is made of a flexible material, and the nozzle plate  421  has a suspension sheet  421   a  and a hollow hole  421   b . The suspension sheet  421   a  is a flexible sheet which can bend and vibrate. The shape and the size of the suspension sheet  421   a  approximately correspond to those of the inner edge of the gas-guiding component loading region  415 , but embodiments are not limited thereto. The shape of the suspension sheet  421   a  may be one of square, circle, ellipse, triangle, and polygon. The hollow hole  421   b  penetrates the center portion of the suspension sheet  421   a  for allowing the gas flowing therethrough. 
     Please refer to  FIG. 9A ,  FIG. 9B , and  FIG. 10A . The chamber frame  422  is stacked on the nozzle plate  421 , and the shape of the chamber frame  422  corresponds to the shape of the nozzle plate  421 . The actuation body  423  is stacked on the chamber frame  422 . A resonance chamber  426  is between the chamber frame  422  and the suspension sheet  421   a . The insulation frame  424  is stacked on the actuation body  423 . The appearance of the insulation frame  424  is similar to that of the nozzle plate  421 . The conductive frame  425  is stacked on the insulation frame  424 . The appearance of the conductive frame  425  is similar to that of the insulation frame  424 . The conductive frame  425  has a conductive frame pin  425   a  and a conductive electrode  425   b . The conductive frame pin  425   a  extends outwardly from the outer edge of the conductive frame  425 , and the conductive electrode  425   b  extends inwardly from the inner edge of the conductive frame  425 . Moreover, the actuation body  423  further includes a piezoelectric carrier plate  423   a , an adjusting resonance plate  423   b , and a piezoelectric plate  423   c . The piezoelectric carrier plate  423   a  is stacked on the chamber frame  422 . The adjusting resonance plate  423   b  is stacked on the piezoelectric carrier plate  423   a . The piezoelectric plate  423   c  is stacked on the adjusting resonance plate  423   b . The adjusting resonance plate  423   b  and the piezoelectric plate  423   c  are accommodated in the insulation frame  424 . The conductive electrode  425   b  of the conductive frame  425  is electrically connected to the piezoelectric plate  423   c . The piezoelectric carrier plate  423   a  and the adjusting resonance plate  423   b  are both made of the same conductive material or different conductive materials. The piezoelectric carrier plate  423   a  has a piezoelectric pin  423   d . The piezoelectric pin  423   d  and the conductive frame pin  425   a  are used for electrical connection so as to receive a driving signal (a driving frequency and a driving voltage), but is not limited thereto. The piezoelectric pin  423   d , the piezoelectric carrier plate  423   a , the adjusting resonance plate  423   b , the piezoelectric plate  423   c , the conductive electrode  425   b , the conductive frame  425 , and the conductive frame pin  425   a  may together form a loop, and the insulation frame  424  is provided for electrically isolating the conductive frame  425  and the actuation body  423  for avoiding short circuit, whereby the driving signal can be transmitted to the piezoelectric plate  423   c . When the piezoelectric plate  423   c  receives the driving signal (a driving frequency and a driving voltage), the piezoelectric plate  423   c  deforms owing to the piezoelectric effect, and thus the piezoelectric carrier plate  423   a  and the adjusting resonance plate  423   b  are driven to perform reciprocating vibration correspondingly. 
     As mentioned above, the adjusting resonance plate  423   b  is disposed between the piezoelectric plate  423   c  and the piezoelectric carrier plate  423   a . As a result, the adjusting resonance plate  423   b  can be served as a buffering element between the piezoelectric plate  423   c  and the piezoelectric carrier plate  423   a , whereby the vibration frequency of the piezoelectric carrier plate  423   a  can be adjusted. Generally, the thickness of the adjusting resonance plate  423   b  is greater than the thickness of the piezoelectric carrier plate  423   a . The thickness of the adjusting resonance plate  423   b  may be changed so as to adjust the vibration frequency of the actuation body  423 . 
     Please refer to  FIG. 9A ,  FIG. 9B , and  FIG. 10A . The nozzle plate  421 , the chamber frame  422 , the actuation body  423 , the insulation frame  424 , and the conductive frame  425  are sequentially stacked and assembled with each other and are disposed in the gas-guiding component loading region  415 , so that the piezoelectric actuation element  42  is placed and positioned in the gas-guiding component loading region  415 . The bottom of the piezoelectric actuation element  42  is positioned with the positioning bumps  415   b , so that the piezoelectric actuation element has a spacing distance  421   c  between the suspension sheet  421   a  and the inner edge of the gas-guiding component loading region  415  for the gas to pass therethrough. 
     Please refer to  FIG. 10A  first. A gas flow chamber  427  is formed between the nozzle plate  421  and the bottom surface of the gas-guiding component loading region  415 . The gas flow chamber  427  is in communication with, through the hollow hole  421   b  of the nozzle plate  421 , the resonance chamber  426  formed among the actuation body  423 , the chamber frame  422 , and the suspension sheet  421   a . By controlling the vibration frequency of the gas in the resonance chamber  426  to be the same as the vibration frequency of the suspension sheet  421   a , the resonance chamber  426  and the suspension sheet  421   a  can generate the Helmholtz resonance effect so as to improve the transmission efficiency of the gas. 
     Please refer to  FIG. 10B . When the piezoelectric plate  423   c  bends toward a direction away from the bottom surface of the gas-guiding component loading region  415 , the suspension sheet  421   a  of the nozzle plate  421  is driven by the piezoelectric plate  423   c  to bend toward the direction away from the bottom surface of the gas-guiding component loading region  415  correspondingly. Hence, the volume of the gas flow chamber  427  expands quickly, so that the internal pressure of the gas flow chamber  427  decreases and becomes negative, thereby drawing the gas outside the piezoelectric actuation element  42  to flow into the piezoelectric actuation element  42  through the spacing distance  421   c . The gas further enters into the resonance chamber  426  through the hollow hole  421   b , thereby increasing the gas pressure of the resonance chamber  426  and thus generating a pressure gradient. Further, as shown in  FIG. 10C , when the piezoelectric plate  423   c  drives the suspension sheet  421   a  of the nozzle plate  421  to move toward the bottom surface of the gas-guiding component loading region  415 , the gas inside the resonance chamber  426  is pushed to flow out quickly through the hollow hole  421   b  so as to further push the gas inside the gas flow chamber  427 , whereby the converged gas can be quickly and massively ejected and guided into the gas flowing hole  415   a  of the gas-guiding component loading region  415  in a state closing to an ideal gas state under the Benulli&#39;s law. Therefore, by repeating the steps as shown in  FIG. 10B  and  FIG. 10C , the piezoelectric plate  423   c  can bend and vibrate reciprocatingly. Further, after the gas is discharged out of the resonance chamber  426 , the internal pressure of the resonance chamber  426  is lower than the equilibrium pressure due to the inertia, thereby the pressure difference guiding the gas outside the resonance chamber  426  into the resonance chamber  426  again. Thus, by controlling the vibration frequency of the gas inside the resonance chamber  426  to be the same as the vibration frequency of the piezoelectric plate  423   c  in such way to generate the Helmholtz resonance effect, high-speed and large-volume gas transmission can be achieved. 
     Moreover, as shown in  FIG. 11A , the gas enters into the gas detection main body  4  from the gas inlet opening  461   a  of the outer cap  46 , passes through the gas inlet through hole  414   a  and enters into the gas inlet groove  414  of the base  41 , and flows to the particulate sensor  45 . As shown in  FIG. 11B , the piezoelectric actuation element  42  continuously draws the gas in the gas inlet path so as to facilitate the gas outside the gas detection main body  4   b  to be guided therein and to pass over the particulate sensor  45 . And, the light beam emitted by the laser component  44  passes through the light permissive window  414   b  and enters into the gas inlet groove  414 . The gas in the gas inlet groove  414  passing over the particulate sensor  45  is illuminated by the light beam. When the light beam encounters the particulate matters in the gas, the light beam scatters to generate light spots. The particulate sensor  45  receives and calculates the light spots generated by the scattering, such that the particulate sensor  45  obtains the particle size and the concentration of the particulate matters in the gas and other related information. And, the gas passing over the particulate sensor  45  is continuously guided into the gas flowing hole  415   a  of the gas-guiding component loading region  415  by the driving of the piezoelectric actuation element  42  and enters into the first region  416   b  of the gas outlet groove  416 . Last, as shown in  FIG. 11C , after the gas enters into the first region  416   b  of the gas outlet groove  4166 , since the piezoelectric actuation element  42  continuously delivers the gas into the first region  416   b , the gas in the first region  416   b  is pushed toward the second region  416   c , and the gas is eventually discharged out of the gas detection main body  4   b  through the gas outlet through hole  416   a  and the gas outlet opening  461   b.    
     Please refer to  FIG. 12 . The base  41  further includes a light trap region  417 . The light trap region  417  is formed by hollowing out the base  41  from the first surface  411  toward the second surface  412 , and the light trap region  417  corresponds to the laser configuration region  413 . Moreover, the light trap region  417  passes through the light permissive window  414   b , such that the light beam emitted by the laser component  44  can be projected into the light trap region  417 . The light trap region  417  has a light trap structure  417   a  having an oblique cone surface, and the light trap structure  417   a  corresponds to the path of the light beam emitted by the laser component  44 . Moreover, the light trap structure  417   a  allows the light beam emitted by the laser component  44  to be reflected to the light trap region  417  by the oblique cone surface of the light trap structure  417   a , thereby preventing the light beam from being reflected to the particulate sensor  45 . Moreover, a light trap distance d is maintained between the light permissive window  414   b  and the position where the light trap structure  417   a  receives the light beam, thereby preventing stray light beams from being directly reflected to the particulate sensor  45  after the light beam projecting on the light trap structure  417   a  is reflected, and thus causing the distortion of detection accuracy. 
     Please refer to  FIG. 5C  and  FIG. 12 . The gas detection module  4  according to one or some embodiments of the present disclosure is not only capable of detecting the particles in the gas, but also capable of detecting the features of the gas guided therein, for example, the gas may be formaldehyde, ammonia, carbon monoxide, carbon dioxide, oxygen, ozone, and so on. Therefore, in one or some embodiments of the present disclosure, the gas detection module  4  further includes a first volatile organic compound sensor  47   a . The first volatile organic compound sensor  47   a  is disposed on the driving circuit board  43  and electrically connected to the driving circuit board  43 , and the first volatile organic compound sensor  47   a  is received in the gas outlet groove  416  for detecting the gas guided out of the gas outlet path, so that the first volatile organic compound sensor  47   a  can be provided for detecting the concentration or the features of the volatile organic compound contained in the gas guided out of the gas outlet path. Alternatively, in one or some embodiments of the present disclosure, the gas detection module  4  further includes a second volatile organic compound sensor  47   b . The second volatile organic compound sensor  47   b  is disposed on the driving circuit board  43  and electrically connected to the driving circuit board  43 . The second volatile organic compound sensor  47   b  is received in the light trap region  417 , and the second volatile organic compound sensor  47   b  is provided for detecting the concentration or the features of the volatile organic compound contained in the gas passing through the gas inlet path of the gas inlet groove  414  and guided into the light trap region  417  through the light permissive window  414   b.    
     To sum up, one or some embodiments of the present disclosure provides a gas detection and purification device. The gas detection and purification device utilizes the gas detection module to detect ambient air quality in the car for the user anytime, and the gas detection and purification device provides a solution for air purification with the purification module. Accordingly, with the combinational application of the gas detection module and the purification module, the gas detection and purification device prevents the user in the in-car space or in the indoor space from breathing hazardous gases, and the user in the car or the indoor space can obtain information from the device so as to have proper prevention actions according to the notified information. Thus, the industrial value of the present application is very high, so the application is submitted in accordance with the law.