CN110566997A - Laser ignition device and gas water heater - Google Patents
Laser ignition device and gas water heater Download PDFInfo
- Publication number
- CN110566997A CN110566997A CN201810566974.4A CN201810566974A CN110566997A CN 110566997 A CN110566997 A CN 110566997A CN 201810566974 A CN201810566974 A CN 201810566974A CN 110566997 A CN110566997 A CN 110566997A
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- Prior art keywords
- laser
- lens
- driving
- focusing
- focusing lens
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/22—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/0027—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using fluid fuel
Abstract
The invention discloses a laser ignition device and a gas water heater, and belongs to the technical field of water heaters. The laser ignition device further comprises: a focusing lens for focusing the laser onto the target plate; and the lens adjusting device is used for driving the focusing lens to move along the laser path direction of the laser emitter. The laser ignition device provided by the invention replaces the original installation form of the fixedly installed focusing lens with a movable form driven by the lens adjusting device, and the lens adjusting device can drive the focusing lens to move along the laser path direction of the laser emitter, so that the position of the laser focus focused by the focusing lens can be changed, the laser focus can be just positioned on the target plate, the laser focusing effect of the laser ignition device is ensured, and the laser ignition device can finish the ignition operation in the shortest ignition time.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a laser ignition device and a gas water heater.
Background
At present, domestic water heater products mainly comprise electric water heaters, gas water heaters, solar water heaters and air energy water heaters. The market of water heaters still takes the traditional electric water heaters and gas water heaters as the leading factor, and along with the fire explosion development of the real estate market in recent years, the industries of the electric water heaters and the gas water heaters are rapidly developed.
For a gas water heater, some products adopt a laser ignition mode to perform ignition heating operation. The laser ignition control technology has five advantages that the laser ignition control technology has a simple ignition and ignition sequence; high reliability and safety; good long-term storage performance; flexible ignition source distribution; high ignition consistency. It is these specific advantages that have led to a high level of emphasis on laser ignition control techniques.
The laser ignition device applied to the gas water heater in the prior art mainly comprises a target plate, a focusing lens, a laser emitter and the like, wherein the target plate, the focusing lens, the laser emitter and the laser emitter are distributed along the same straight line, and laser emitted by the laser emitter can be focused on the target plate by the focusing lens, so that combustible gas in a combustion chamber of the gas water heater is ignited by the target plate with the increased temperature. However, due to the existence of factors such as installation errors among the target plate, the laser emitter and the focusing lens, the focusing focal point position of the focusing lens does not necessarily fall on the target plate exactly, which results in poor actual laser focusing effect of the laser emitter and the problem of overlong ignition time.
Disclosure of Invention
the invention provides a laser ignition device and a gas water heater, and aims to solve the problem that the ignition time of part of gas water heater products is too long due to factors such as assembly errors and the like. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
according to a first aspect of the present invention, there is provided a laser ignition device applied to a gas water heater, the laser ignition device comprising a target plate mountable in a combustion chamber of the gas water heater and a laser emitter for emitting laser light to the target plate, the laser ignition device further comprising:
A focusing lens for focusing the laser onto the target plate;
And the lens adjusting device is used for driving the focusing lens to move along the laser path direction of the laser emitter.
In an alternative embodiment, a lens adjustment apparatus includes:
The lens bracket is arranged on the front side of the emission port of the laser emitter and is provided with a lens groove for accommodating the focusing lens;
And the driving device is used for driving the lens frame to move along the laser path direction.
In an alternative embodiment, the drive device comprises:
The first driving shaft is arranged in the direction parallel to the laser path, the first end of the first driving shaft is in driving connection with the first motor, and the second end of the first driving shaft is connected with the mirror bracket;
And the first motor is used for driving the first driving shaft to move telescopically along the laser path direction.
in an alternative embodiment, the lens frame comprises an inner lens frame and an outer lens frame which are positioned on the same plane perpendicular to the laser path and sleeved inside and outside, and the inner lens frame can be deflected relative to the outer lens frame;
the lens groove is arranged on the inner lens frame.
In an alternative embodiment, a rotating shaft arranged along the radial direction of the focusing lens is arranged between the inner lens frame and the outer lens frame, and the inner lens frame deflects around the axis of the rotating shaft;
The laser ignition device also comprises a second motor which is in driving connection with the rotating shaft.
In an alternative embodiment, the laser ignition device further comprises:
And the driver is in driving connection with the laser igniter and is used for driving the laser emitter to move along the laser path direction.
In an alternative embodiment, the driver comprises:
The second driving shaft is arranged in the direction parallel to the laser path, the first end of the second driving shaft is in driving connection with the second motor, and the second end of the second driving shaft is connected with the laser emitter;
And the second motor is used for driving the second driving shaft to move telescopically along the laser path direction.
According to a second aspect of the present invention, there is also provided a gas water heater comprising a combustion chamber and a laser igniter according to any one of the preceding first aspects for igniting a combustible gas in the combustion chamber by emitting laser light to a target plate.
in an alternative embodiment, the wall of the combustion chamber is provided with a transmission hole, the laser emitter is arranged outside the wall, and an emission port of the laser emitter is aligned with the transmission hole.
In an alternative embodiment, the combustion chamber includes a plurality of fire vents, and the target plate is disposed on one of the fire vents.
The invention adopts the technical scheme and has the beneficial effects that:
the laser ignition device provided by the invention replaces the original installation form of the fixedly installed focusing lens with a movable form driven by the lens adjusting device, and the lens adjusting device can drive the focusing lens to move along the laser path direction of the laser emitter, so that the position of the laser focus focused by the focusing lens can be changed, the laser focus can be just positioned on the target plate, the laser focusing effect of the laser ignition device is ensured, and the laser ignition device can finish the ignition operation in the shortest ignition time.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
FIG. 1 is a first schematic view of the combustion chamber configuration of the gas water heater of the present invention according to an exemplary embodiment;
FIG. 2 is a schematic front view of the lens switching apparatus of the present invention according to an exemplary embodiment;
FIG. 3 is a second schematic structural view of the combustion chamber of the gas water heater of the present invention shown in accordance with an exemplary embodiment;
FIG. 4 is an enlarged schematic view of part A of FIG. 3;
FIG. 5 is a schematic illustration three of the structure of the combustion chamber of the gas water heater of the present invention shown in accordance with an exemplary embodiment;
Fig. 6 is a schematic view in the direction of a-a of fig. 5.
wherein, 1, a combustion chamber; 11. a fire vent; 2. a target plate; 3. a laser transmitter; 4. a focusing lens; 51. a frame; 52. a drive device; 53. a shaft hole; 6. a controller; 7. a shield; 8. the motor is driven.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.
FIG. 1 is a first schematic view of the combustion chamber of the gas water heater of the present invention according to an exemplary embodiment; fig. 1 shows a combustion chamber and a laser ignition device arranged in the combustion chamber.
As shown in fig. 1, the present invention provides a laser ignition device applied to a gas water heater, the laser ignition device comprises a target plate 2 which can be installed in a combustion chamber 1 of the gas water heater and a laser emitter 3 which is used for emitting laser to the target plate 2, the target plate 2 is used for receiving the laser of the laser emitter 3 and raising the temperature of the target plate 2 by using the energy of the laser, when the temperature of the target plate 2 is higher than the ignition point of the gas, the gas can be ignited, thereby completing the ignition operation of the combustion chamber 1 by a laser igniter.
The laser ignition device further comprises at least two focusing lenses 4 with different optical parameters and a lens switching device, wherein the at least two focusing lenses 4 are arranged on the lens switching device, and the lens switching device is used for switching the selected focusing lens 4 of the at least two focusing lenses 4 to the laser path of the laser emitter 3, so that the focusing lens 4 focuses the laser on the target plate 2.
In an alternative embodiment, the optical parameters of at least two focusing lenses 4 are different in focal length between the focusing lenses 4, and as the embodiment, 4 focusing lenses 4 with different optical parameters are provided, the focal lengths of 4 focusing lenses 4 are sequentially increased, where the numerical ranges of the focal lengths of the focusing lenses 4 are determined according to an easily-occurring assembly error range between the target plate 2 and the focusing lens 4 installed on the gas water heater, for example, for a certain model of gas water heater, the assembly error range between the target plate 2 and the focusing lens 4 is-2 cm to 1.5cm, the maximum focal length difference between the focusing lenses 4 is 2cm +1.5cm to 3.5cm, specifically, assuming that the standard installation distance between the target plate 2 and the focusing lens 4 is 20cm, the distance between the two in actual installation ranges from 18cm (20cm-2cm) to 21.5cm (20cm +1.5cm), namely, the focal length of the most distant focusing lens 4 among the plurality of focusing lenses 4 is 21.5cm, the focal length of the least distant focusing lens 4 is 18cm, and the focal lengths of the remaining focusing lenses 4 are between 18cm and 21.5 cm.
the laser ignition device provided by the invention is different from the existing structural form of only installing a single focusing lens 4, is provided with at least two focusing lenses 4 with different optical parameters, and can switch the focusing to the focusing position through the lens switching device, so that the focusing lens 4 which is suitable for the current scene and can meet the requirement of the shortest ignition time can be selected according to different application scenes (such as different positions of the target plate 2 or different gas components), the focus of the selected focusing lens 4 can be positioned on the target plate 2 as much as possible, the energy of laser can be more concentrated on the target plate 2, the temperature of the target plate 2 can be increased as soon as possible, the time for reaching the gas ignition point can be shortened, and the purpose of quick ignition can be achieved.
Through the result, the universality and the compatibility of the laser ignition device can be improved, the use requirements of users on gas water heater products are met, and the use experience of the users is improved.
In an alternative embodiment of the invention, the lens switching device comprises: a strip-shaped mirror bracket 51 which is arranged at the front side of the emission port of the laser emitter 3, at least two lens grooves are arranged along the radial direction of the mirror bracket 51, and a focusing lens 4 is arranged in each lens groove; a driving device 52, the driving device 52 is used for driving the lens frame 51 to move along the radial direction thereof so as to move the selected focusing lens 4 to the laser path.
In this embodiment, the mirror holder 51 is in a plate-shaped strip pattern and is parallel to the wall of the combustion chamber 1, and optionally, the longitudinal direction of the mirror holder 51 is the horizontal direction or the vertical direction, so that the driving device 52 can drive the mirror holder 51 to move along the horizontal direction or the vertical direction, and the focusing lenses 4 mounted on the mirror holder 51 can sequentially move to the laser path, so that the focusing lenses 4 with different focal lengths can be respectively used for ignition operation, and the ignition duration of the focusing lenses can be tested, so that the focusing lenses 4 meeting the use requirements of users can be selected according to the ignition duration.
Specifically, the frame 51 is provided with a rack extending and formed along the radial direction; the driving device 52 comprises a motor capable of rotating in two directions, a gear engaged with the rack is disposed at the end of the crankshaft of the motor, and the motor can drive the mirror holder 51 to move along the radial direction thereof through the engagement of the gear and the rack.
Here, also by changing the rotation direction of the motor, the specific direction of the radial direction of the mirror frame 51 can be adjusted; for example, when the motor rotates in the forward direction, the motor moves the mirror holder 51 in a first radial direction; when the motor rotates reversely, the motor drives the mirror bracket 51 to move along the second radial direction; the first direction and the second direction are oriented oppositely. Thus, the switching operation of the focus lens 4 can be conveniently realized by controlling the forward and reverse rotation of the motor.
fig. 2 is a schematic front view of the lens switching apparatus of the present invention according to an exemplary embodiment.
In still another alternative embodiment of the present invention, as shown in fig. 2, a lens switching apparatus includes: the lens frame 51 is provided with at least two lens grooves arranged along the same circumferential line, a focusing lens 4 is arranged in each lens groove, and the laser path of the laser emitted by the laser emitter 3 passes through the circumferential line vertically; and a driving device 52, wherein the driving device 52 is used for driving the lens frame 51 to rotate around the circle center thereof so as to move the selected focusing lens 4 to the laser path.
specifically, in the embodiment shown in fig. 2, the frame 51 has a cross-shaped structure, and 4 focusing lenses 4 are provided and respectively disposed on 4 free end portions of the cross-shaped structure, and the distances between the 4 free end portions and the central point are equal, so that the centers of the 4 focusing lenses 4 are located on the same circumferential line.
The middle part of the spectacle frame 51 is provided with a shaft hole 53, and the shaft hole 53 is positioned on the circle center of the circumferential line; the driving device 52 comprises a bi-directional rotatable motor, the shaft end of which is drivingly connected to the shaft hole 53.
here, the motor of the driving device 52 drives the mirror holder 51 to rotate around its center point (i.e., the center of the circumference) to switch the focus lens 4. In the embodiment, the lens holder 51 is arranged parallel to the wall of the combustion chamber 1, and the distance from the central point to the laser path is equal to the radius length of the circumference, so that the lens center of the focusing lens 4 moved to the fine light path is always collinear with the laser path during the switching of different focusing lenses 4, thereby ensuring the focusing effect of the focusing lens 4 on the laser.
Both of the lens switching devices shown above also include brackets (not shown) that can be used to secure the lens switching device and the like to the wall of the combustion chamber 1 or other structure of the gas water heater not shown.
The present invention also provides a gas water heater comprising a combustion chamber 1 and a laser igniter as shown in the previous embodiments for igniting a combustible gas in the combustion chamber 1 by emitting laser light to a target plate 2.
In an optional embodiment of the invention, a transmission hole is formed in a shell wall of the combustion chamber 1, the laser emitter 3 is arranged on the outer side of the shell wall, and an emission port of the laser emitter 3 is arranged in alignment with the transmission hole; the focusing lens 4 switched by the lens switching device is positioned between the transmission hole and the emission port.
In an alternative embodiment of the invention, the combustion chamber 1 comprises a plurality of fire vents 11, and the target plate 2 is arranged on one of the fire vents 11.
The invention discloses an ignition debugging method applied to the gas water heater, which comprises the following steps: sequentially switching at least two focusing lenses 4 to the laser path of the laser emitter 3, and counting the ignition time of the laser igniter corresponding to each focusing lens 4; and taking the focusing lens 4 corresponding to the shortest ignition time length as the selected focusing lens 4 in the current use period.
For example, in the foregoing embodiment, 4 focusing lenses 4 are provided, so that before the air conditioner leaves the factory or during the debugging process of the gas water heater in the home of the user, the 4 focusing lenses 4 are sequentially switched to the laser path of the laser emitter 3, and the time length consumed when the current focusing lens 4 completes ignition is measured; then, the ignition is turned off, and after a set time (e.g., 10 minutes) to cool down, the time taken for the next focusing lens 4 to complete the ignition is measured. In this way, the ignition time period of each focusing lens 4 can be measured separately.
And comparing the ignition time lengths corresponding to the plurality of focusing lenses 4, and taking the focusing lens 4 corresponding to the shortest ignition time length as the selected focusing lens 4 in the current service cycle. Here, the current usage period may be 1 month, 1 year, or the like. After the end of the current usage period, the above-described operation is repeated to select the focusing lens 4 to be used in the next usage period. Thus, through the periodic measurement selection process, the problems of distance change and focus dislocation between the focusing lens 4 and the target plate 2 caused by factors such as combustion deformation (such as bending of the target plate 2) of the target plate 2 and the like can be solved, so that the selected focusing lens 4 is readjusted, the focus of the adjusted focusing lens 4 can fall on the target plate 2 again, and the ignition effect of the target plate is ensured.
In an alternative embodiment of the present invention, the counting of the ignition duration of the laser igniter corresponding to each focusing lens 4 may include: counting the single ignition duration of each focusing lens 4 at the set ignition times, for example, each focusing lens 4 respectively performs 10 ignition operations, and respectively obtains the ignition duration of each ignition operation; and calculating the average value of the single ignition time length of the set ignition times, and taking the average value as the ignition time length.
in an optional embodiment, the debugging process may also be performed during the actual use of the gas water heater, for example, if a user uses the gas water heater 4 times in 5 days, it may be set that different focusing lenses 4 are used for ignition each time, the numbers of the 4 focusing lenses 4 are sequentially lens 1, lens 2, lens 3 and lens 4, the lens 1 is used for ignition operation for the first time, and after the ignition operation is completed, the ignition time duration corresponding to the lens 1 is counted; then, switching the lens 2 to a laser path, performing ignition operation by using the lens 2 when next ignition is performed, and recording the corresponding ignition time length; and so on. After 4 focusing lenses 4 finish one ignition operation in turn, the shortest ignition time length can be determined by comparing the 4 ignition time lengths, and the focusing lens 4 corresponding to the shortest ignition time length can be used as the selected focusing lens 4 in the current use period.
Therefore, in the foregoing embodiment, the gas water heater of the present invention further includes a controller 6, the controller 6 is electrically connected to the lens switching device, and the controller 6 can be used to control the operation of the lens switching device and execute the control flow of the control method shown in the foregoing.
FIG. 3 is a schematic structural view II of the combustion chamber 1 of the gas water heater of the present invention according to an exemplary embodiment; fig. 3 shows a combustion chamber 1 and a laser ignition device arranged in the combustion chamber 1. Fig. 4 is a partially enlarged schematic view of a portion a of fig. 3.
as shown in fig. 3 and 4, the present invention provides a laser ignition device applied to a gas water heater, the laser ignition device including: a focusing lens 4 for focusing the laser light onto the target plate 2; and the focusing lens 4 is arranged on the lens adjusting device, and the lens adjusting device is used for driving the focusing lens 4 to move along the laser path direction of the laser emitter 3.
The laser ignition device provided by the invention replaces the original installation form of the fixedly installed focusing lens 4 with a movable form driven by the lens adjusting device, the lens adjusting device can drive the focusing lens 4 to move along the laser path direction of the laser emitter 3, and further can change the position of the laser focus focused by the focusing lens 4, so that the laser focus can be just positioned on the target plate 2, the laser focusing effect of the laser ignition device is ensured, and the laser ignition device can finish the ignition operation in the shortest ignition time.
In an alternative embodiment of the present invention, the gas water heater further includes a controller 6, and the controller 6 is configured to control the lens adjusting device to move the focusing lens 4 along the laser path of the laser emitter 3.
The lens adjusting device includes: a lens holder 51 provided on the front side of the emission port of the laser emitter 3, the lens holder 51 having a lens groove for accommodating the focusing lens 4; and a driving device 52, wherein the driving device 52 is used for driving the lens frame 51 to move along the laser path direction.
Specifically, the driving device 52 includes a first driving shaft and a first motor, wherein the first driving shaft is disposed along a direction parallel to the laser path, a first end of the first driving shaft is in driving connection with the first motor, and a second end of the first driving shaft is connected with the lens frame 51; the first motor is used for driving the first driving shaft to move telescopically along the laser path direction.
Specifically, the first motor comprises a rotor arranged inside and a stator sleeved on the periphery of the rotor; the middle part of the rotor is of a hollow structure, and the inner wall of the rotor is provided with threads; the first driving shaft is a straight rod-shaped rotating shaft which is arranged in the hollow structure of the rotor in a penetrating way; the outer wall of the rotating shaft is also provided with threads, so that the rotating shaft and the rotor are in driving connection through thread matching.
in this embodiment, the first motor is a motor type capable of controlling the rotor to rotate in two directions, and the rotor can be rotated in a forward direction or a reverse direction by applying different voltages; when the rotor rotates in different directions, the rotating shaft can move in different directions along the self axial direction due to the limited matching of the rotor and the threads between the rotor and the rotating shaft; illustratively, when a forward voltage is applied to the first motor, the rotor rotates in a forward direction, and at this time, the rotor pushes the rotating shaft to move along the laser path direction to a side away from the laser emitter 3 by the pressing force of the screw threads, so that the rotating shaft exhibits an "overhanging" behavior, so that the mirror holder 51 at the second end of the rotating shaft is away from the laser emitter 3; when a reverse voltage is applied to the first motor, the rotor rotates in a reverse direction, and at this time, the rotor pushes the rotating shaft to move to a side close to the laser emitter 3 along the laser path direction by the pressing force of the screw threads, so that the rotating shaft exhibits a "retraction" behavior, so that the mirror holder 51 at the second end of the rotating shaft is close to the laser emitter 3.
In yet another alternative embodiment of the present invention, the lens frame 51 includes an inner lens frame 51 and an outer lens frame 51 which are both located on a plane perpendicular to the laser path and sleeved inside and outside, for example, the outer lens frame 51 is a circular frame structure with a slightly larger outer contour, and the inner part is a hollow circular structure; the inner frame 51 is a circular frame structure having an outer contour slightly smaller than the hollow circular structure of the outer frame 51, so that the inner frame 51 can be disposed in the hollow circular structure of the outer frame 51; the focusing lens 4 is provided in the inner frame 51.
In this embodiment, the inner frame 51 is deflectable relative to the outer frame 51; specifically, a rotating shaft arranged along the radial direction of the focusing lens 4 is arranged between the inner lens frame 51 and the outer lens frame 51, and the inner lens frame 51 deflects around the axis of the rotating shaft; the laser ignition device further comprises a second motor in driving connection with the rotating shaft, the second motor can be used for driving the inner lens frame 51 to deflect through the rotating shaft, and in the process, the outer lens frame 51 is in a static state.
In the embodiment, the outer frame 51 has a shaft hole 53 formed along the radial direction, one end of the rotating shaft passes through the shaft hole 53 and is connected with the inner frame 51, and the other end is connected to the second motor.
In yet another alternative embodiment of the present invention, the laser ignition device further comprises a driver, which is in driving connection with the laser igniter and is used for driving the laser emitter 3 to move along the laser path direction. The adjusting process of the lens adjusting device is that the laser emitter 3 is not moved, and the focusing lens 4 is driven to move, so that the purpose of changing the focus falling point position of the focusing lens 4 is achieved; in this embodiment, the position of the focus point of the focusing lens 4 can be finely adjusted by driving the laser emitter 3 to move through the driver without moving the focusing lens 4, so as to ensure that the optimal laser focusing effect is achieved.
In an alternative embodiment of the invention, the driver comprises: the second driving shaft is arranged in the direction parallel to the laser path, the first end of the second driving shaft is in driving connection with the second motor, and the second end of the second driving shaft is connected with the laser emitter 3; and the second motor is used for driving the second driving shaft to move telescopically along the laser path direction.
Here, the assembly structure of the second driving shaft and the second motor may be the first driving shaft and the first motor in the foregoing embodiments, and details thereof are not described herein.
In another embodiment of the present invention, the present invention further provides a laser ignition device, which is integrated by the focusing lens 4, the lens switching device and the lens adjusting device in the foregoing embodiments, wherein the focusing lens 4 is disposed on the lens switching device to switch the plurality of focusing lenses 4 to the laser path by using the lens switching device, and the lens adjusting device can drive the lens switching device to perform telescopic movement, so as to change the focus landing position of the focusing lens 4.
The present invention also provides a gas water heater comprising a combustion chamber 1 and a laser igniter as provided in the previous embodiments for igniting a combustible gas in the combustion chamber 1 by emitting laser light to a target plate 2.
In an alternative embodiment of the present invention, the casing wall of the combustion chamber 1 is provided with a transmission hole, the laser emitter 3 is disposed on the outer side of the casing wall, and the emission port of the laser emitter 3 is aligned with the transmission hole.
In an alternative embodiment of the invention, the combustion chamber 1 comprises a plurality of fire vents 11, and the target plate 2 is arranged on one of the fire vents 11.
Fig. 5 is a schematic view three of the structure of the combustion chamber of the gas water heater of the present invention according to an exemplary embodiment.
as shown in fig. 5, the present invention also provides a gas water heater, comprising: the wall of the combustion chamber 1 is provided with a transmission hole; the laser emitter 3 is arranged on the outer side of the shell wall, and the emitting port of the laser emitter 3 is aligned with the transmission hole; the focusing lens 4 is arranged between the transmission hole and the emission port and used for focusing laser emitted by the laser emitter 3; and the sealing mechanism can controllably open or seal the transmission hole.
the gas water heater provided by the invention is additionally provided with the sealing mechanism which can be used for opening or sealing the transmission hole for injecting the laser into the combustion chamber 1, so that after the transmission hole is sealed, the high temperature of flame in the combustion chamber 1 can be prevented from influencing the focusing lens 4 through the transmission hole, the adverse influence of gas combustion in the combustion chamber 1 on the focusing lens 4 is greatly reduced, and the service life of the focusing lens 4 is ensured.
In an alternative embodiment of the invention, the closure mechanism comprises: a strip-shaped lens frame 51, wherein the lens frame 51 is symmetrically provided with a closed part and a lens groove for accommodating the focusing lens 4; the symmetrical center of the spectacle frame 51 is provided with a shaft hole 53; and the driving motor 8 is connected with a shaft of the driving motor 8 in the shaft hole 53, so that the driving motor 8 drives the mirror bracket 51 to rotate around the shaft, the closed part of the mirror bracket 51 rotates to the position between the transmission hole and the focusing lens 4 to close the transmission hole, and the focusing lens 4 rotates to the position between the transmission hole and the focusing lens 4 to focus laser.
The lens holder 51 is a rectangular plate, one end of which is provided with a circular lens groove for accommodating the focusing lens 4, and the other end of which is an enclosed plate surface which is not grooved, and the enclosed plate surface can be used for shielding the transmission hole so as to separate the flame of the combustion chamber 1 and the focusing lens 4 at two sides of the enclosed plate surface, thereby playing a role of protecting the focusing lens 4.
Fig. 6 is a schematic view in the direction of a-a of fig. 5.
In yet another alternative embodiment, as shown in fig. 6, the closure mechanism comprises: a shield 7 arranged parallel to the outside of the housing wall; the shielding piece 7 is provided with a shaft hole 53; and the driving motor 8 and the shaft of the driving motor 8 are connected to the shaft hole 53, so that the driving motor 8 drives the shielding piece 7 to rotate around the shaft, and the shielding piece 7 rotates to a shielding position which is positioned between the transmission hole and the focusing lens 4 and can seal the transmission hole and a position far away from the shielding position.
In an alternative embodiment of the invention, the combustion chamber 1 comprises a plurality of fire vents 11, wherein one of the fire vents 11 is provided with a target plate 2, and the target plate 2 is at the focal position of the laser light focused by the focusing lens 4.
In an alternative embodiment of the invention, the gas water heater further comprises a controller 6, the controller 6 being configured to: when a control instruction for indicating water heating is received, the closing mechanism is controlled to open the transmission hole, and the laser emitter 3 is controlled to execute the ignition operation of emitting laser; after the ignition is completed, the control closing mechanism closes the transmission hole.
In an optional embodiment of the present invention, the gas water heater further includes a lens adjusting device, the focusing lens is disposed on the lens adjusting device, and the lens switching device is configured to drive the focusing lens to move along a laser path of the laser emitter.
Specifically, the lens adjusting device includes: the lens bracket is arranged on the front side of the emission port of the laser emitter and is provided with a lens groove for accommodating the focusing lens; and the driving device is used for driving the lens frame to move along the laser path direction.
Illustratively, the driving device comprises a first driving shaft arranged along the direction parallel to the laser path, a first end of the first driving shaft is in driving connection with a first motor, and a second end of the first driving shaft is connected with the lens frame; and the first motor is used for driving the first driving shaft to move telescopically along the laser path direction.
The structure of the lens adjusting device can refer to the lens adjusting device shown in the previous embodiment, and is not described herein.
In yet another alternative embodiment of the present invention, the gas water heater further comprises: and the driver is in driving connection with the laser igniter and is used for driving the laser emitter to move along the laser path direction of the laser emitter.
Illustratively, the driver includes: the second driving shaft is arranged in the direction parallel to the laser path, the first end of the second driving shaft is in driving connection with the second motor, and the second end of the second driving shaft is connected with the laser emitter; and the second motor is used for driving the second driving shaft to move telescopically along the laser path direction.
The structure of the driver and the laser emitter can be found in the previous embodiments, and is not described herein.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. Be applied to gas heater's laser ignition, laser ignition including mountable in the target plate in gas heater's the combustion chamber and be used for to the laser emitter of target plate lasing, its characterized in that, laser ignition still includes:
a focusing lens for focusing the laser light onto the target plate;
and the lens adjusting device is used for driving the focusing lens to move along the laser path direction of the laser emitter.
2. The laser ignition device of claim 1 wherein the lens adjustment device comprises:
the lens frame is arranged on the front side of an emission port of the laser emitter and is provided with a lens groove for accommodating the focusing lens;
and the driving device is used for driving the mirror frame to move along the laser path direction.
3. the laser ignition device of claim 2 wherein the drive means comprises:
The first driving shaft is arranged in a direction parallel to the laser path, the first end of the first driving shaft is in driving connection with the first motor, and the second end of the first driving shaft is connected with the mirror bracket;
and the first motor is used for driving the first driving shaft to move telescopically along the laser path direction.
4. The laser ignition device of claim 2 wherein the mirror mount comprises an inner mirror mount and an outer mirror mount nested together in a plane perpendicular to the laser path, the inner mirror mount being deflectable relative to the outer mirror mount;
The lens groove is arranged on the inner lens frame.
5. The laser ignition device according to claim 4, wherein a rotating shaft arranged along a radial direction of the focusing lens is arranged between the inner mirror frame and the outer mirror frame, and the inner mirror frame is deflected around an axis of the rotating shaft;
The laser ignition device further comprises a second motor in driving connection with the rotating shaft.
6. The laser ignition device of claim 1 further comprising:
and the driver is in driving connection with the laser igniter and is used for driving the laser emitter to move along the laser path direction.
7. The laser ignition device of claim 4 wherein the driver comprises:
The second driving shaft is arranged in a direction parallel to the laser path, the first end of the second driving shaft is in driving connection with the second motor, and the second end of the second driving shaft is connected with the laser emitter;
And the second motor is used for driving the second driving shaft to move telescopically along the laser path direction.
8. A gas water heater comprising a combustion chamber and a laser igniter according to any one of claims 1-7 for igniting a combustible gas in the combustion chamber by emitting laser light to the target plate.
9. The gas water heater of claim 8, wherein the wall of the combustion chamber is provided with a transmission hole, the laser emitter is arranged outside the wall, and an emission port of the laser emitter is aligned with the transmission hole.
10. the gas fired water heater of claim 8, wherein the combustion chamber includes a plurality of fire vents, and the target plate is disposed on one of the fire vents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810566974.4A CN110566997A (en) | 2018-06-05 | 2018-06-05 | Laser ignition device and gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810566974.4A CN110566997A (en) | 2018-06-05 | 2018-06-05 | Laser ignition device and gas water heater |
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| Publication Number | Publication Date |
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| CN110566997A true CN110566997A (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810566974.4A Pending CN110566997A (en) | 2018-06-05 | 2018-06-05 | Laser ignition device and gas water heater |
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Application publication date: 20191213 |