CN212788859U

CN212788859U - Antifog defogging goggles of integral type

Info

Publication number: CN212788859U
Application number: CN202020817634.7U
Authority: CN
Inventors: 廖景峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2021-03-26
Anticipated expiration: 2030-05-18

Abstract

The utility model discloses an integrated antifog and demisting goggles, which uses high-pressure airflow generated by a micro air source to be sprayed onto goggles lenses through an airflow distributor to remove fog, so as to ensure the antifog demisting effect, and the goggles have three operation modes and can meet the use habits of different users; and two pressure guarantee mechanisms, namely a high-efficiency air flow filtering biological guarantee mechanism, are also arranged, so that the safety of a user and a machine can be guaranteed.

Description

Antifog defogging goggles of integral type

Technical Field

The invention relates to the field of medical health and labor protection. And more particularly to an anti-fog, defogging goggle.

Background

The goggles are fogged after being worn, which is a common knowledge problem which often confuses users, and after the goggles are fogged, a lot of inconvenience is brought to the users, especially in the medical environment, the lives of the users or patients can be seriously threatened. The antifogging of the goggles at present is basically made on lens materials and coatings, particularly the latter, hundreds of lens antifogging agents are on the market, a plurality of antifogging courses are also on the network, and a plurality of antifogging skills are still distributed in the medical field. The effect is known only by paying more attention to the sexual news-until 4 months 2020, the new crown epidemic situation is basically worried about, and the problem of fogging of goggles still exists. The existing antifogging technology of the goggles is poor in effect in a specific medical environment, and even has no effect, and the specific expression is that the goggles after the technology are used not only fog, but also a large number of small water drops are arranged on lenses, so that the lenses cannot be taken off and wiped in a severe infectious environment, and once the goggles fog, the goggles can only be listened to for a day. Therefore, there is a need for goggles that reliably ensure non-fogging for medical personnel.

The principle that the goggles can fog after being worn is similar to the principle that the automobile windshield fog in winter, and the working principle of the invention is the same as the principle that the automobile windshield fog is removed, namely when the fog is formed, high-pressure air flow conveyed by a micro fan or an air pump is sprayed on the goggles to take away water vapor. Unlike automotive windshield demisting: behind the lens of the goggles is the eye, the most important and most sensitive organ of the person, and therefore, it is considered desirable that the delivered high pressure air stream not only provides defogging but also does not harm the eyes.

SUMMERY OF THE UTILITY MODEL

The technical scheme to be solved by the invention is as follows: to provide a goggle which is prefabricated with a special air passage, and air flow is jetted onto the lens at a specific angle, only little air flow can be rebounded to eyes, and the goggle does not have a difference from a breeze brushing surface and does not hurt the eyes.

An integrated anti-fog, defogging goggle comprising: the device comprises a micro air source, a goggle body, an airflow conduit and a case;

the goggles body is provided with an air flow distributor, an air guide pipe and a nozzle which are all integrally formed structures, and the air flow distributor is positioned above the goggles upper cover and is used for evenly distributing air conveyed by a micro air source to the two lenses; the nozzle is positioned below the upper cover of the goggles;

the air flow distributor is strip-shaped in appearance, two groove-shaped spaces, namely a front groove and a rear groove, which are parallel in the front and the rear are arranged in the air flow distributor, the front groove and the rear groove are communicated at the middle position, air can freely enter and exit the two spaces, two air guide pipe orifices with rectangular or elliptical cross sections are arranged at two ends of the bottom of the front groove, and one end of the rear groove extends into a bent round pipe which is an air flow input pipe and is used for being connected with an air flow guide pipe; the bottom of the airflow distributor and the upper cover of the goggles are integrally formed; the downward extending part of the air duct opening is an air duct, the bending extending part of the air duct facing the mirror surface is a nozzle, the middle space of the nozzle is in a wide slit shape and is a nozzle opening, the area of the nozzle opening is smaller than the sectional area of the inner cavity of the air duct, the air duct is favorable for collecting air flow, and the impact force is enhanced; the surface formed by the upper edge and the lower edge of the nozzle forms an acute angle with the lens of the goggles;

the power supply of a micro air source, a differential pressure sensor (or a differential pressure switch) and an alarm horn are prefabricated on a comprehensive functional circuit board; the miniature air source, the comprehensive function circuit board and the pressure release valve are packaged in a case, and the bottom of the case is provided with heat dissipation holes which are used as an emergent pressure release air exhaust channel besides heat dissipation; the pressure relief valve and the measuring end of the differential pressure sensor are connected to the air outlet end of the miniature air source through an air exhaust to perform safety protection and airflow regulation functions; the right side surface of the case is provided with a power switch, and the inside of the case is connected with the comprehensive function circuit board; the case air outlet pipe is arranged on the case; the air outlet pipe of the case is connected with the air outlet end of the micro air source in the case through the main flow path of the air exhaust.

The airflow guide pipe is a flexible rubber pipe, and the pipe diameter of the airflow guide pipe is matched with that of an air outlet pipe of the case;

preferably, a circuit type airflow adjusting module is prefabricated on the comprehensive function circuit board, a circuit type airflow adjusting knob is installed on the right side face of the case, and the circuit type airflow adjusting knob is connected with the comprehensive function circuit board inside the case.

Preferably, an air path type air flow regulating valve is further arranged in the case, and the pressure release valve, the air path type air flow regulating valve and the measuring end of the differential pressure sensor are connected to the air outlet end of the micro air source through an air exhaust with 3 branches so as to perform safety protection and air flow regulating functions; the right side surface of the case is provided with a gas path type gas flow adjusting knob, the inside of the case is connected with the gas path type gas flow adjusting knob, and the case gas outlet pipe is connected with the gas outlet end of the micro gas source in the case through a main flow path of a gas exhaust with 3 branches.

Preferably, a wireless receiving control module and an electronic cycle timing control module are also prefabricated on the comprehensive function circuit board; an electronic cycle timing controller display screen, an electronic cycle timing controller setting button and a corresponding indicator light are arranged on the case; the electronic cycle timing controller display screen and the electronic cycle timing controller setting button are connected with the comprehensive function circuit board in the mainframe box, a user sets the air source running time and the running interval time through the electronic cycle timing controller setting button, and the setting parameters are displayed on the electronic cycle timing controller display screen; after the setting is finished, the anti-fog and demisting tasks of the goggles are automatically executed; if no parameter is set, it means that the present invention does not use the automatic control mode but uses the remote control or the manual control mode of the main cabinet side knob.

The micro air source is a micro air pump capable of using a battery firstly, and a micro turbine fan is selected secondly.

Preferably, the bottom of the case is provided with an air inlet filter, and the inside of the case is connected with an air inlet of a micro air source; when used in infectious environment, the air source needs to use an air pump with higher vacuum degree to overcome the resistance of the air inlet filter.

Preferably, one side of the case is concave to adapt to the shape of the waist of a human body, and the concave side is provided with a hanging buckle for passing through a waistband.

The battery adopts a lithium battery, is similar to an embedded quick-mounting and quick-dismounting design of a digital camera sample, and is convenient for quick replacement.

Preferably, the surface formed by the upper edge and the lower edge of the spout forms an acute angle of less than 45 degrees with the goggle lens.

Preferably, the bottom of the goggle body is prefabricated with an exhaust hole near the frame.

Furthermore, the exhaust holes are wide-slit exhaust holes, and the number of the exhaust holes is 1-3 on each side.

Preferably, the combination of the air duct and the nozzle is of two types: short-nozzle plates and long-nozzle plates; the upper edge of the nozzle inclined plane of the short nozzle plate is horizontally aligned with the lower edge of the mirror frame, the rest part of the nozzle inclined plane is below the lower edge of the mirror frame, and the sprayed air flow can reach the upper 1/3 part of the mirror surface and flow downwards along the lens at a high speed; the short-mouth nozzle is far away from the center of the lens, so that a better defogging and antifogging effect can be achieved only by needing larger air flow, and the short-mouth nozzle has the advantages that wearing of the myopia glasses is not influenced, so that the short-mouth nozzle is mainly used for users wearing the glasses; the appearance and the function of long mouth version are the same with short mouth version, and the difference is that the air duct is longer, on the upper and lower distance, prolongs 4~10mm downwards than short mouth version, because of long mouth version nozzle is nearer from the lens center, only needs less air flow, can obtain fine defogging antifog effect.

Preferably, the air flow guide pipe is a soft rubber pipe slightly longer than the upper half of the human body, and the pipe diameter of the soft rubber pipe is matched with the air source output pipe.

The utility model has the advantages that: (1) the utility model discloses when using, can adopt above-mentioned tolerance regulation and control device to regulate and control the airflow that the invention sprays the lens to adapt to different users' hobby, some people like the airflow great, and some people are more sensitive, like the airflow little. There are two ways of adjustment: one is to regulate the working condition of the machine by regulating the voltage or current frequency supplied to the micro air source through a circuit type regulating device, thereby regulating the air quantity output by the air source, and the regulating mode is commonly used on the oxygen supply device of the aquarium; the other is adjusted by an air path type adjusting device, a shunt valve is arranged on the air path, so that part of the air output by the micro air source can be shunted before reaching the air flow distributor.

(2) The utility model discloses at the installation air inlet filter of machine bottom of the case portion, can conveniently change, simultaneously, the kind of filter can be selected according to the purpose difference that uses for when ordinary industrial use or manual preparation, select particulate filter can, when being used for the eye protection under the infectious environment, need choose high-efficient combined filter for use-wherein the filter media that can filter the virus that will have at least, make filter media, HEPA (high efficiency air cleaner) of N95 gauze mask or N99 gauze mask for example.

(3) The utility model discloses a miniature air supply opens stops control can adopt parallel three routes control-all the way is the switch knob of manual regulation machine box surface, and another way is the remote control of using wireless control subassembly, and the third route is that preset miniature air supply operating duration and start interval time through electronic cycle timing controller module and realize automatic control. Of course, only either or both of the control modes may be selected as necessary for cost saving.

(4) The utility model discloses set up the relief valve, this relief valve is a check valve that has great opening pressure, installs in the gas circuit of miniature air supply output, and when the air current distributor on the goggles appeared the gas circuit and blockked up, the pressure can obviously increase in the gas circuit, and when pressure reached the opening pressure of relief valve, the relief valve was opened, high pressure in the discharge gas circuit, protection eyes and air supply machine.

(5) The utility model discloses a differential pressure sensor external member include differential pressure sensor and miniature loudspeaker, also the utility model discloses an one of the safety protection measure. The sensor measuring end is installed in the gas circuit, and signal output part passes through the comprehensive function circuit board and is connected with miniature loudspeaker, and when the gas circuit high pressure of goggles takes place, will trigger sensor signal output part voltage synchro variation, when reaching miniature loudspeaker's operating voltage, loudspeaker sound production was reported to the police, reminds the user. In order to reduce the product cost, a differential pressure switch can be used to replace a differential pressure sensor.

The inventor points out that the utility model discloses a miniature air pump, miniature turbofan, differential pressure sensor external member, relief valve, electronic cycle timing control module, wireless control subassembly, two kinds of tolerance adjusting control device, battery, all are ripe technique, can all buy the finished product on the market, also can customize according to producer's requirement.

Drawings

FIG. 1 is a right front oblique view of the long mouth version of the goggle of the present invention with the airflow distributor removed;

FIG. 2 is a right front oblique view of the long mouth version of the goggles of the present invention;

FIG. 3 is a top sectional view of the airflow distributor of the present invention;

fig. 4 is a schematic view of the chassis of the present invention.

Fig. 5 is a schematic view of the bottom vent of the goggles of the present invention.

In the figure: b01 is the upper cover of goggles, b02 is the air duct, b03 is the nozzle, b04 is the spout, b05 is the air flow distributor, b06 is the air flow input tube, b07 is the front groove, b08 is the back groove; b09 is an air guide pipe orifice, b10 is an exhaust hole; c01 is a case air outlet pipe, c02 is an electronic cycle timing controller display screen, c03 is an electronic cycle timing controller setting button (three in parallel), c04 is an air circuit type air flow adjusting knob, and c05 is a power switch and a circuit type air flow adjusting knob.

Detailed Description

The invention is further illustrated with reference to the accompanying drawings:

the goggles of the invention are composed of the following parts: the device comprises a micro air source, an air flow adjusting and controlling device, an air inlet filter, a battery, a goggle body, an air flow distributor, an air flow conduit, a wireless control assembly, a pressure release valve, a pressure difference sensor suite, an electronic cycle timing controller module and a case.

The micro air source is a micro air pump, and the power of the micro air source is supplied by a battery.

The power supply of a micro air source, a circuit type air flow adjusting module, a wireless receiving control module, an electronic circulation timing control module, a differential pressure sensor (or a differential pressure switch) and an alarm horn are prefabricated on a comprehensive function circuit board.

The miniature air source, the comprehensive function circuit board, the pressure release valve and the air path type air flow regulating valve are packaged in a rectangular box, the box is called as a case, one side of the case is sunken to adapt to the appearance of the waist of a human body, and a hanging buckle is arranged on the sunken side and used for penetrating through a waistband. The air inlet filter is installed at the bottom of the mainframe box, the battery is installed in a battery jar on the left side of the mainframe box, and the battery is designed in an embedded quick-mounting and quick-dismounting mode similar to a digital camera, so that the quick replacement is convenient. The heat dissipation holes are also manufactured at the bottom of the mainframe box and are used as a channel for discharging shunting gas and discharging emergency pressure relief gas besides heat dissipation.

The pressure release valve, the gas path type gas flow regulating valve and the measuring end of the differential pressure sensor are connected to the gas outlet end of the micro gas source through a gas exhaust with 3 branches to execute the functions of safety protection and gas flow regulation.

The right side surface of the case is provided with an air passage type air flow adjusting knob c04, a power switch and a circuit type air flow adjusting knob c 05. The inside of the case is respectively connected with the gas path type gas flow regulating valve and the comprehensive function circuit board. The main cabinet is provided with a cabinet air outlet pipe c01, an electronic cycle timing controller display screen c02, an electronic cycle timing controller setting button c03 and various indicator lamps (not shown). The case outlet pipe c01 is connected with the outlet end of the micro air source through a main flow path of the air exhaust with 3 branches in the case. An electronic cycle timing controller display screen c02 and an electronic cycle timing controller setting button c03 are connected with a comprehensive function circuit board in the case, a user sets the air source running time and the running interval time through the electronic cycle timing controller setting button c03, and setting parameters are displayed on the electronic cycle timing controller display screen c 02. After the arrangement is finished, the anti-fog and demisting tasks of the goggles can be automatically executed. If no parameter is set, it means that the present invention does not use the automatic control mode but uses the remote control or the manual control mode of the main cabinet side knob.

The goggles are characterized in that an airflow distributor (b 05), an air duct (b 02) and a nozzle (b 03) are arranged on the goggles body, the airflow distributor b05 and the goggles body are of an integrally formed structure, the appearance of the airflow distributor b05 is long, two groove-shaped spaces which are parallel front and back are formed inside the airflow distributor b05, namely a front groove b07 and a rear groove b08, the front groove b08 and the rear groove b08 are communicated at the middle positions, air can freely enter and exit the two spaces, two air duct openings b09 with rectangular or elliptical cross sections are formed in two ends of the bottom of the front groove b07, one end of the rear groove b08 extends to form a bent round pipe which is an airflow input pipe b06 and is used for; the bottom of airflow distributor b05 is integrally formed with the upper cover of the goggles; the downward extending part of the air duct nozzle b09 is an air duct b02, the bending extending part of the air duct b02 facing the mirror surface is a nozzle b03, the middle space of the nozzle b03 is in a wide slit shape and is a nozzle b04, and the area of the nozzle b04 is smaller than the sectional area of the inner cavity of the air duct b02, so that the air flow can be collected conveniently, and the impact force can be enhanced; the surface formed by the upper edge and the lower edge of the nozzle b04 forms an acute angle with the goggle lens and is less than 45 degrees.

Wide seam-shaped vent holes b10 are prefabricated at the bottom of the goggles close to the frame, and two are arranged at two sides of the wide seam-shaped vent holes b 10.

Preferably, the combination of the gas guide tube and the nozzle is of two types: short-nozzle plates and long-nozzle plates; the upper edge of the inclined plane of the nozzle b03 of the short-nozzle plate is horizontally aligned with the lower edge of the lens frame b02, the rest part of the inclined plane of the nozzle b03 is below the lower edge of the lens frame b02, the sprayed air flow can reach the upper 1/3 part of the lens surface and flow downwards along the lens at high speed, the short-nozzle plate nozzle is far away from the center of the lens, and a good defogging and antifogging effect can be achieved only by needing larger air flow, and the short-nozzle plate nozzle has the advantages that the wearing of the myopia glasses is not influenced, so the short-nozzle plate nozzle is mainly used; the appearance and the function of long mouth version are the same with short mouth version, and the difference is that the air duct is longer, on the upper and lower distance, prolongs 4~10mm downwards than short mouth version, because of long mouth version nozzle is nearer from the lens center, only needs less air flow, can obtain fine defogging antifog effect.

The air flow guide pipe is a soft rubber pipe which is slightly longer than the length of the upper half of the human body, and the pipe diameter of the soft rubber pipe is matched with the air source output pipe.

The goggles of the invention have the use method that:

firstly, the short-mouth plate or the long-mouth plate antifogging and demisting goggles are selected according to whether a user wears glasses or not.

Next, the mode in which the invention will operate is determined: an automatic control mode or a manual control mode, if the automatic control mode is selected, the micro air supply operation time and the operation interval time are set through the electronic cycle timing controller setting button c 03.

The waistband is threaded through the hanging buckle on the concave surface of the mainframe box to fix the mainframe box on the waist. Connecting the airflow conduit with the chassis air outlet pipe c01 on the main chassis and the airflow input pipe b06 on the airflow distributor, wearing the goggles in a conventional way, turning the power switch and the circuit type airflow adjusting knob c05 to the power supply opening position, at the moment, the air supply does not run,

continuing to rotate the adjusting knob c05 or press the related key of the wireless command transmitter (remote controller) to start the air supply operation, the micro air supply outputs high-pressure air flow, the air flow is sent to the air flow input tube b06 through the air flow conduit, enters the rear groove b08, enters the front groove b07 through the channel between the front groove and the rear groove, and is sprayed along the air guide tube opening b09, the nozzle b03 and the nozzle b04And the lens is shot on the lens to perform the functions of defogging and fog prevention. The air flow sprayed onto the goggles lens can be adjusted through the two operation modes, the air passage type air flow adjusting knob c04 can also be rotated, the sprayed air flow can be adjusted more accurately, after the anti-fog and defogging tasks are completed, the adjusting knob c05 is reset, and the air source machine stops working;

if the manual or remote control operation is not used, the automatic control mode of the present invention can be used, if the user feels the effect is not good, the cabinet can be rotated to the front of the abdomen, the operation parameters can be reset by the setting button c03, and the amount of the air flow sprayed can be adjusted by rotating the air path type air flow adjusting knob c04 until the user feels comfortable.

The air flow output by the micro air source used by the invention can fully ensure the requirements of defogging and antifogging functions. The defogging protection task can be completed without using the maximum output gas of the gas source. Through the two air volume adjusting modes, each user can find the air flow suitable for the user.

The above embodiments are only some of the embodiments of the present invention, and do not limit the present invention, and any simple modification, change and equivalent structural changes of the above embodiments according to the technical spirit of the present invention are within the protection scope of the present invention.

Claims

1. An integrated anti-fog, defogging goggle, comprising: the device comprises a micro air source, a goggle body, an airflow conduit and a case;

the goggles are characterized in that an air flow distributor (b 05), an air guide pipe (b 02) and a nozzle (b 03) are arranged on the goggles body, the air flow distributor and the goggles body are of an integrally formed structure, and the air flow distributor (b 05) is positioned above the goggles upper cover (b 01) and used for evenly distributing air conveyed by a micro air source to the two lenses; the air duct (b 02) and the nozzle (b 03) are positioned below the goggles upper cover (b 01);

the air flow distributor (b 05) is long-strip-shaped in appearance, two groove-shaped spaces which are parallel front and back, namely a front groove (b 07) and a rear groove (b 08), are arranged inside the air flow distributor (b 05), the front groove (b 07) and the rear groove (b 08) are communicated at the middle positions, air can freely enter and exit the two spaces, two air guide pipe openings (b 09) with rectangular or elliptical cross sections are arranged at two ends of the bottom of the front groove (b 07), one end of the rear groove (b 08) extends to form a bent round pipe which is an air flow input pipe (b 06) and is used for being connected with an air flow guide pipe; the bottom of the air flow distributor (b 05) is integrated with the goggles upper cover; the downward extending part of the air duct nozzle (b 09) is an air duct (b 02), the bending extending part of the air duct (b 02) facing the mirror surface is a nozzle (b 03), the middle space of the nozzle (b 03) is in a wide slit shape and is a nozzle (b 04), and the area of the nozzle (b 04) is smaller than the sectional area of the inner cavity of the air duct (b 02), so that the air duct is favorably converged, and the impact force is enhanced; the surface formed by the upper edge and the lower edge of the nozzle (b 04) forms an acute angle with the goggle lens;

the power supply of a micro air source, a differential pressure sensor (or a differential pressure switch) and an alarm horn are prefabricated on a comprehensive functional circuit board; the miniature air source, the comprehensive function circuit board and the pressure release valve are packaged in a case, and the bottom of the case is provided with heat dissipation holes which are used as an emergent pressure release air exhaust channel besides heat dissipation; the pressure relief valve and the measuring end of the differential pressure sensor are connected to the air outlet end of the miniature air source through an air exhaust to perform safety protection and airflow regulation functions; the left side of the case is provided with a battery jar with a protective door; the right side surface of the case is provided with a power switch, and the inside of the case is connected with the comprehensive function circuit board; a case air outlet pipe (c 01) is arranged on the case; the case air outlet pipe (c 01) is connected with the air outlet end of the micro air source in the case through a main flow path of the air exhaust;

the air flow guide pipe is a soft rubber pipe, and the pipe diameter of the air flow guide pipe is matched with that of an air outlet pipe (c 01) of the case.

2. The integrated antifog and defogging goggles as claimed in claim 1, wherein said multifunctional circuit board is further preformed with a circuit type airflow adjusting module, and a circuit type airflow adjusting knob (c 05) is mounted on the right side surface of the case, said circuit type airflow adjusting knob (c 05) being connected with the multifunctional circuit board inside the case.

3. The integrated antifogging and defogging goggles as claimed in claim 1, wherein an air path type air flow regulating valve is further disposed in the case, and the pressure release valve, the air path type air flow regulating valve and the measuring end of the pressure difference sensor are connected to the air outlet end of the micro air source through an air exhaust with 3 branches to perform safety protection and air flow regulation functions; the right side surface of the case is provided with an air path type air flow adjusting knob (c 04), the inside of the case is connected with the air path type air flow adjusting valve, and an air outlet pipe (c 01) of the case is connected with an air outlet end of a micro air source through a main flow path of an air exhaust with 3 branches.

4. An integrated antifogging and defogging goggle according to claim 1 wherein a wireless receiving control module and an electronic cycle timing control module are also prefabricated on said comprehensive function circuit board; an electronic cycle timing controller display screen (c 02), an electronic cycle timing controller setting button (c 03) and a corresponding indicator light are arranged on the case; the electronic cycle timing controller display screen (c 02) and the electronic cycle timing controller setting button (c 03) are connected with the comprehensive function circuit board in the main case, a user sets the air source running time and the running interval time through the electronic cycle timing controller setting button (c 03), and the set parameters are displayed on the electronic cycle timing controller display screen (c 02); after the setting is finished, the antifogging and demisting tasks of the goggles are automatically executed.

5. An integrated anti-fog, defogging goggle according to claim 1 wherein said micro air source is a micro air pump or a micro turbo fan; and the bottom of the case is provided with an air inlet filter which is connected with a micro air source air inlet in the case.

6. An integrated antifog and defogging goggle according to claim 1 wherein one side of said housing is recessed to conform to the shape of the waist of a human body, the recessed side having a hook for passing through the belt; the battery is a lithium battery.

7. An integrated anti-fog, defogging goggle according to claim 1 wherein the vent holes (b10) are preformed in the bottom of the goggle body near the bezel.

8. An integrated anti-fog, defogging goggle according to claim 7 wherein said vent holes are wide slit shaped vent holes (b10) in a number of 1-3 on each side.

9. An integrated anti-fog, defogging goggle according to claim 1 wherein the surfaces formed by the upper and lower edges of said spout are at an acute angle of less than 45 degrees with respect to the goggle lens.

10. An integrated anti-fog, defogging goggle according to claim 1 wherein said combination of air conduit and nozzle is of two types: short-nozzle plates and long-nozzle plates; the upper edge of the inclined plane of the nozzle (b 03) of the short nozzle plate is horizontally aligned with the lower edge of the mirror frame, the rest part of the inclined plane of the nozzle (b 03) is below the lower edge of the mirror frame, and the sprayed air flow can reach the upper 1/3 part of the mirror surface; the appearance and the function of long mouth version are the same with short mouth version, and the difference is that the air duct is longer, on the upper and lower distance, prolongs 4~10mm downwards than short mouth version.