CN112747313B

CN112747313B - Gas distributor, combustion device for water heater and gas distribution method for water heater

Info

Publication number: CN112747313B
Application number: CN202110017596.6A
Authority: CN
Inventors: 卢志龙; 黄驰
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2022-03-29
Anticipated expiration: 2041-01-07
Also published as: CN112747313A

Abstract

The invention discloses a gas distributor, a combustion device for a water heater and a gas distribution method for the water heater. The distribution cavity of the front pipe body is provided with an air inlet and a plurality of air outlet nozzles; the conical valves are arranged in one-to-one correspondence with the air outlet nozzles and comprise racks; the first movement mechanism is provided with an output end for outputting movement along a first linear direction, the output end is provided with a gear, the gear can be arranged to move to a position corresponding to any rack up and down, and the gear is controlled to drive the racks to move linearly so as to adjust the opening degree of the gas outlet nozzle; the second movement mechanism is provided for driving the gear to move in the up-down direction and to engage with or disengage from the rack. According to the invention, the conical valve is arranged at each gas outlet nozzle, and the first movement mechanism and the second movement mechanism are used for controlling each conical valve, so that the gas outlet sectional area of each gas outlet nozzle is accurately controlled, and the gas amount is accurately controlled; in addition, the water heater can also automatically adapt to different types of gas.

Description

Gas distributor, combustion device for water heater and gas distribution method for water heater

Technical Field

The invention relates to the technical field of gas water heaters, in particular to a gas distributor, a combustion device for a water heater and a gas distribution method for the water heater.

Background

The gas source for the gas water heater is divided into artificial gas, natural gas and liquefied petroleum gas. The gas supply field of China starts late, and the current three gas sources are all in use, so that different distributors need to be replaced when the gas sources of the gas water heater are switched, professional personnel are needed to carry out door-to-door operation, and the gas water heater face cover needs to be opened to replace the distributors in the operation process, which wastes time and labor.

In addition, in the prior art, when the combustion load of the water heater changes, part of nozzles are cut off by using the electromagnetic valve in a sectional control mode to adapt to the combustion load, but the sectional control mode can only roughly realize two-section and three-section control, and cannot accurately control a combustion device.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a gas distributor, a combustion device for a water heater and a gas distribution method for the water heater.

The invention solves the technical problems through the following technical scheme:

a gas dispenser, comprising:

the front pipe body is provided with a distribution cavity, and the distribution cavity is provided with an air inlet and a plurality of air outlet nozzles which are arranged along a first straight line direction;

the conical valves are arranged in one-to-one correspondence with the air outlet nozzles, are used for controlling the air outlet cross sections of the air outlet nozzles, and comprise racks;

the first movement mechanism is provided with an output end used for outputting movement along the first linear direction, the output end is provided with a gear, the gear is set to be capable of moving to a position corresponding to any one of the racks up and down, and the gear is controlled to drive the racks to move linearly so as to adjust the opening degree of the air outlet nozzle;

and the second movement mechanism is arranged for driving the gear to move in the vertical direction and to be meshed with or separated from the rack.

Preferably, the conical valve comprises a valve rod and a conical valve core fixed at one end of the valve rod, and the rack is arranged on the valve rod.

Preferably, the valve stem has a projection extending radially outwardly thereof, the projection extending in an axial direction of the valve stem, the rack being located on the projection;

and/or the rack extends into the air outlet nozzle;

and/or, the gas distributor still include with the guide that the valve rod one-to-one set up, the one end of guide is fixed in on the head tube body, the valve rod runs through the other end of guide, and with guide sliding connection.

Preferably, the output end further comprises a guide rod extending in the first linear direction and a guide rod driver arranged to drive the guide rod in rotation; the gear and the guide rod are arranged in sliding connection in a first linear direction and are mutually limited in the circumferential direction of the guide rod.

Preferably, one of the guide bar and the gear has a guide groove, and the other has a guide block, and the guide groove and the guide block are slidably coupled in a first linear direction and are circumferentially restricted from each other by the guide bar.

Preferably, the output end further comprises a first gear box and a second gear box; the first movement mechanism also comprises a lead screw fixed on the front tube body and a lead screw driving piece used for driving the lead screw to rotate; the second gear box is arranged to move along a first linear direction along with the rotation of the lead screw; the first gear box is arranged to move along with the second gear box in a first linear direction and is arranged to drive the guide rod to move in the vertical direction under the driving of the second movement mechanism.

Preferably, the first gear box comprises an upper box body and a lower box body, the lower end of the upper box body is communicated with the upper end of the lower box body, the guide rod penetrates through the side wall of the upper box body, and two opposite end parts of the lower box body in the first linear direction are both open; the second movement mechanism is configured to drive the lower end of the lower box to move in the up-down direction.

Preferably, one of the first gear box and the second gear box has a sliding block, and the other has a sliding fixing chute for the sliding block to slide.

Preferably, the upper end of the first gear box is provided with a yielding groove, the yielding groove penetrates through two side faces of the first gear box and is communicated with an inner cavity of the first gear box, and the gear is partially or completely positioned in the yielding groove;

and/or the guide rod penetrates through the upper end of the first gear box;

and/or the screw rod penetrates through the first gear box, and the bottom surface of the first gear box moves up and down under the driving of the second movement mechanism.

Preferably, the upper end and the lower end of the second gear box are provided with abdicating holes for abdicating the first gear box;

and/or at least one of two opposite ends of the first gear box in the first linear direction is matched with the lead screw.

Preferably, the second motion mechanism comprises a cam and a cam driving member, the cam is rotationally connected to the head tube body, and the cam driving member is used for driving the cam to rotate; a surface of the cam is in contact with the output end, the cam being arranged to drive the gear in an up-down direction during rotation.

The utility model provides a burner for water heater, includes fire row, ion response needle and as above any the gas distributor, the nozzle of giving vent to anger with the fire row one-to-one intercommunication, the ion response needle is used for detecting the flame that the fire was arranged to arrange with the fire row one-to-one setting.

A gas distribution method for a water heater is realized by adopting the combustion device for the water heater, and comprises the following steps:

s10, detecting flames of fire rows in a combustion state through ion induction needles according to frequency and obtaining induction current values, adjusting corresponding air outlet sectional areas one by one for first fire rows with induction current values not in a preset standard current interval, and adjusting the air outlet sectional area corresponding to each first fire row until the induction current value is in the standard current interval;

and S20, controlling the water heater to enter a normal combustion mode.

Preferably, in step S10, the outlet cross-sectional area of the first type fire damper is adjusted to be higher than the lower limit of the standard current interval, and the outlet cross-sectional area of the first type fire damper is adjusted to be lower than the upper limit of the standard current interval.

Preferably, in step S10, when the first type fire row is adjusted, the ion induction needle is controlled to detect and obtain an induction current value every time the rack moves by N teeth.

Preferably, step S10 specifically includes the following steps:

s11, detecting the flame of the fire grate in a combustion state through the ion induction needle according to the frequency, obtaining an induction current value, identifying a first type fire grate of which the induction current value is not in a preset standard current interval, if the first type fire grate does not exist, executing the step S20, otherwise executing the step S12;

s12, controlling the output end to be positioned at an air outlet nozzle corresponding to the first fire row;

s13, controlling a second motion mechanism to drive the gear box rack to move until the gear is meshed with the rack;

and S14, controlling the first movement mechanism to drive the gear to rotate, moving the rack by N teeth, and returning to the step S11.

Preferably, step S12 specifically includes the following steps:

s121, judging whether the gear is meshed with a rack corresponding to the non-first-type fire grate, if so, controlling the gear to be separated from the rack through a second motion mechanism, and then further controlling the output end to be positioned at the first-type fire grate on the left side or the right side, otherwise, executing the step S122;

s122, judging whether the output end is meshed with the rack corresponding to the first fire row of the left side or the right side, if so, executing the step S13, otherwise, controlling the output end to be positioned at the air outlet nozzle corresponding to the first fire row of the left side or the right side, and then executing the step S13.

Preferably, the ion sensitive probe in step S10 is detected every 100 milliseconds;

and/or in step S10, determining the fire row to be ignited through a gas proportional valve at the front end of the front pipe body.

Preferably, step S20 specifically includes the following steps:

s21, detecting the combustion load according to the frequency, controlling the gas distributor to gradually reduce the air outlet sectional area of the burning fire when the combustion load is reduced, and adjusting and controlling the rotating speed of a fan for supplementing air according to the air-fuel ratio prestored in the water heater until the air outlet quantity of the gas distributor is matched with the combustion load; and when the combustion load is judged to be increased, controlling the gas distributor to increase the gas outlet sectional area of the burning fire exhaust one by one, and simultaneously adjusting the rotating speed of the fan according to the air-fuel ratio until the gas outlet quantity of the gas distributor is matched with the combustion load.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows:

according to the invention, the conical valve is arranged at each air outlet nozzle, and the first movement mechanism and the second movement mechanism are used for controlling each conical valve, so that the air outlet sectional area of each air outlet nozzle is accurately controlled, and the accurate control of the air quantity is realized.

The gas distribution method for the water heater adjusts the gas quantity supplied to the fire grate according to the flame condition, the gas distribution method can keep accurate control no matter which gas is supplied, and the water heater can automatically adapt to different types of gas when the gas type is switched, so that the operation of a professional on the door is not needed, and the water heater is not needed to be disassembled and assembled.

Drawings

FIG. 1 is a schematic structural diagram of a gas distributor according to an embodiment of the present invention;

FIG. 2 is an exploded view of a gas distributor according to one embodiment of the present invention;

FIG. 3 is a schematic view of a portion of a gas distributor according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a gas distributor according to an embodiment of the present invention;

FIG. 5 is a front view of a combustion apparatus for a water heater according to an embodiment of the present invention;

FIG. 6 is a flow chart of a fuel gas distribution method for a water heater according to an embodiment of the present invention;

fig. 7 is a flowchart of a fuel gas distribution method for a water heater according to an embodiment of the invention.

Description of reference numerals:

front pipe body 1

Distribution chamber 11

Air inlet 12

Air outlet nozzle 13

First segment 131

Second section 132

Third segment 133

Nozzle cone surface 134

Housing 14

Conical valve 2

Rack 21

Valve stem 22

Convex part 221

Conical valve core 23

Conical surface 231 of the valve core

First movement mechanism 3

Output terminal 31

Guide rod 311

Guide block 312

Guide bar drive 313

First gear box 314

Upper box 3141

Lower box 3142

Slider 3143

Relieving groove 3144

Second gear box 315

Sliding groove 3151

Gear 316

3161 guide groove

Lead screw 32

Screw drive 33

Second movement mechanism 4

Cam 41

Cam driver 42

Guide part 51

Guide slot 511

Sliding groove 512

Rod part 52

Cam 53

Cam driver 54

Fire grate 6

Ion induction needle 7

Detailed Description

The present invention is further illustrated by the following examples, but is not limited thereby in the scope of the examples described below.

Please refer to fig. 1-4 for understanding. The embodiment of the invention provides a gas distributor which is used for distributing gas and can be applied to a water heater. The gas distributor comprises a front pipe body 1, a conical valve 2, a first movement mechanism 3 and a second movement mechanism 4.

The front pipe body 1 is provided with a distribution cavity 11, and the distribution cavity 11 is provided with an air inlet 12 and a plurality of air outlet nozzles 13 which are arranged along a first straight line direction; gas and/or air enters the distribution chamber 11 via the gas inlet 12 and is output to the fire row 6 via the gas outlet nozzle 13. The head tube body 1 has a housing 14, the air inlet 12 and the air outlet nozzle 13 are disposed on the housing 14, the air outlet nozzle 13 and other parts of the housing 14 may be integrally formed or may be separate members, and the air outlet nozzle 13 is assembled on the housing 14 through a fixing process.

The conical valves 2 are arranged in one-to-one correspondence with the air outlet nozzles 13, the conical valves 2 are arranged to be used for controlling air outlet cross sections of the air outlet nozzles 13 to be connected, and the air outlet cross sections are positively correlated with opening degrees of the air outlet nozzles 13. When the conical valve 2 moves linearly along a second linear direction perpendicular to the first linear direction, the adjustment of the air outlet section is realized. The conical valve 2 comprises a rack 21, and the adjustment of the air outlet cross-sectional area is realized by controlling the rack 21 to move along the second linear direction.

The first motion mechanism 3 has an output end 31 for outputting motion along a first linear direction, the output end 31 has a gear 316, the gear 316 is configured to move to a position corresponding to the upper and lower positions of any one of the racks 21 along with other parts of the output end 31, the gear 316 is located above or below the rack 21, and is configured to control the gear 316 to drive the rack 21 to adjust the opening degree of the outlet nozzle 13. Wherein, the first motion mechanism 3 controls the output end 31 to move to a position corresponding to any one rack 21 under the condition that the gear 316 is separated from the rack 21; after the gear 316 is meshed with the rack 21, the first moving mechanism 3 can control the gear 316 to rotate to drive the rack 21 to move in the second linear direction, so that the conical valve 2 is controlled to be close to or far away from the air outlet of the air outlet nozzle 13, and the adjustment of the air outlet section is realized.

The second movement mechanism 4 is provided for driving the gear 316 in the up-down direction and engaging with or disengaging from the rack 21, in other words, the above-described movement of the gear 316 toward and away from the rack 21 is controlled via the second movement mechanism 4.

In the invention, the conical valve 2 is arranged at each air outlet nozzle 13, and the first movement mechanism 3 and the second movement mechanism 4 are used for controlling each conical valve 2, so that the air outlet sectional area of each air outlet nozzle 13 is accurately controlled, and the accurate control of the air quantity is realized.

In the embodiment of the present invention, the conical valve 2 includes a stem 22 and a conical valve core 23 fixed to one end of the stem 22, and the rack 21 is disposed on the stem 22. The conical valve core 23 is used for controlling the opening degree of the air outlet of the nozzle, namely controlling the air outlet cross section area, and the valve rod 22 is used for controlling the conical valve core 23 to linearly move in the second linear direction. The conical core 23 and stem 22 may be formed integrally or may be two separate pieces and assembled together.

In the embodiment of the present invention, the conical valve core 23 has a valve core conical surface 231, which is located on the side surface of the conical valve core 23, the outlet nozzle 13 has a first segment 131, a second segment 132, and a third segment 133, the inner wall of the second segment 132 is a nozzle conical surface 134 matching with the valve core conical surface 231, the outlet cross-sectional area is zero when the periphery of the valve core conical surface 231 is attached to the periphery of the nozzle conical surface 134, and the outlet cross-sectional area is gradually increased until the outlet is completely opened when the valve core conical surface 231 is gradually away from the nozzle conical surface 134. The inner wall surfaces of the first segment 131 and the third segment 133 are both cylindrical surfaces and respectively connect both ends of the nozzle tapered surface 134.

In the embodiment of the present invention, the rack 21 protrudes from the surface of the valve stem 22, so as to be engaged with the gear 316, and thus the interference or jamming between the gear 316 and other parts of the valve stem 22 can be avoided, in other words, the protruding of the rack 21 from the surface of the valve stem 22 improves the reliability and precision of the transmission between the rack 21 and the gear 316.

The rack 21 is partially extended into the air outlet nozzle 13 to ensure that the rack 21 has enough length for the movement of the conical valve core 23, thereby improving the adjustable range of the air outlet cross section and the reliability of the gas distributor.

In the embodiment of the present invention, the stem 22 has the projection 221 projecting outward in the radial direction thereof, the projection 221 extends in the axial direction of the stem 22, and the rack 21 is located on the projection 221. The strength and rigidity of the valve rod 22 are improved by the protrusion 221, and the straightness of the rack 21 during machining is also ensured.

The entire protrusion 221 may be provided as the rack 21, but as an alternative, a part of the protrusion 221 may be provided as the rack 21, and a part of the protrusion 221 is reserved at one end of the protrusion 221 close to the conical valve core 23, and the end of the protrusion 221 may extend directly to the conical valve core 23, thereby improving the strength and rigidity of the valve stem 22 and reducing the difficulty of processing.

In the embodiment of the present invention, the gas distributor further includes a guide member disposed in one-to-one correspondence to the valve stem 22, one end of the guide member is fixed to the head tube body 1, and the valve stem 22 penetrates through the other end of the guide member and is slidably connected to the guide member. When the first movement mechanism 3 controls the valve rod 22 to move in the second linear direction, the valve rod 22 slides on the corresponding guide piece, so that the accuracy of the movement direction is accurately ensured. The valve rod 22 is guided by arranging the guide piece on the front pipe body 1, so that the precision of the movement direction of the valve rod 22 is ensured, and the service life of the valve rod 22 is prolonged.

The guide piece can be hung and fixed on the front pipe body 1, and the lower end of the guide piece is connected with the valve rod 22 in a sliding mode, in this mode, the influence and the interference of the guide piece on the fuel gas in the distribution cavity 11 are small; alternatively, the guide may be fixed at its lower end to the head pipe body 1 and at its upper end to guide the stem 22, or may be horizontally disposed with one end fixed to the head pipe body 1 and the other end to guide the stem 22.

The guide member may be integrally formed with the housing 14 to facilitate accurate control of the assembly accuracy of the gas distributor, or may be a separate member that is assembled to the housing 14.

In the embodiment of the present invention, the guide member includes a guide portion 51, the guide portion 51 has a guide slot 511 and a sliding slot 512 through which the stem 22 passes, and the rack 21 slides in the sliding slot 512 when the stem 22 moves. Specifically, the guide further includes a rod portion 52, one end of the rod portion 52 is fixed to the housing 14 of the head pipe body 1, and the other end is fixedly connected to the guide portion 51, and the guide and the rod portion 52 may be integrally formed. The guide portion 51 surrounds the stem 22 at the guide groove 511, or partially surrounds the stem 22. The sliding groove 512 corresponds to the rack 21, or it is understood that the sliding groove 512 corresponds to the protrusion 221, and when the valve rod 22 moves, the protrusion 221 slides in the sliding groove 512, so that the valve rod 22 is accurately guided, and the movement accuracy of the valve rod 22 is effectively ensured.

In the embodiment of the present invention, the guide slot 511 is closed at its periphery, that is, the guide slot 511 is enclosed at the periphery of the valve rod 22, so that the stability of the movement of the valve rod 22 is improved. Alternatively, the sliding groove 512 may have a shape with one side opened, as shown in fig. 3; specifically, the guide groove 511 is an obliquely arranged U-shaped groove, the lower end of the guide groove 511 is provided with a sliding groove 512, and the sliding groove 512 is located so that the rack 21 is positioned right below the axis of the valve rod 22, so that the guide is realized, the friction with the rack 21 and/or the protrusion 221 is reduced, and the clamping condition is avoided.

In the embodiment of the present invention, the output end 31 further includes a guide rod 311 extending along the first linear direction and a guide rod driving member 313, and the guide rod driving member 313 is configured to drive the guide rod 311 to rotate; the gear 316 and the guide rod 311 are arranged to be slidably coupled in a first linear direction, being mutually limited in the circumferential direction of the guide rod 311.

Specifically, the guide rod 311 is rod-shaped, both ends of the guide rod 311 are rotatably connected to both sides of the head pipe body 1, and the guide rod 311 and the head pipe body 1 are axially constrained to each other and have relative movement in the vertical direction. The guide rod driving member 313 is externally arranged on the head tube body 1, the guide rod driving member 313 is fixedly connected with one end of the guide rod 311, and the guide rod driving member 313 drives the guide rod 311 to rotate. The guide bar drive 313 may be a stepper motor or other mechanism for outputting rotational motion.

A waist-shaped groove can be arranged at the position of the front tube body 1 corresponding to the guide rod 311, the guide rod driving part 313 and the gear 316 synchronously move in the vertical direction under the driving of the second movement mechanism 4, and the waist-shaped groove provides a space for the vertical movement of the guide rod 311. A sliding rail mechanism may be disposed between the guide rod driving member 313 and the head tube body 1 to ensure that the guide rod 311 is always in the first linear direction and will not tilt when the guide rod driving member 313 moves up and down.

In the embodiment of the present invention, one of the guide rod 311 and the gear 316 has the guide groove 3161, and the other has the guide block 312, and the guide groove 3161 and the guide block 312 are configured to be slidably connected in the first linear direction and are limited to each other in the circumferential direction of the guide rod 311, that is, two opposite side surfaces of the guide groove 3161 and two opposite side surfaces of the guide block 312 abut against each other in the circumferential direction of the guide rod 311.

In the embodiment of the invention, the guide blocks 312 are symmetrically arranged on the guide rod 311, and the guide grooves 3161 are arranged on the inner wall of the gear 316 in pairs, so that the movement stability of the gear 316 is improved.

In the embodiment of the present invention, the output end 31 further includes a first gear box 314 and a second gear box 315; the first movement mechanism 3 further comprises a lead screw 32 fixed on the head tube body 1 and a lead screw driving piece 33 for driving the lead screw 32 to rotate; the second gear box 315 is arranged to move in a first linear direction with rotation of the lead screw 32; the first gear box 314 is configured to move in a first linear direction with the second gear box 315, and is configured to move the guide rod 311 in an up-and-down direction under the driving of the second moving mechanism 4. One of the functions of the second gear box 315 is to serve as an intermediate member of transmission for transmitting the movement of the second moving mechanism 4 to the gear 316 and the guide rod 311, so that the second moving mechanism 4 does not directly drive the gear 316.

Specifically, the extending direction of the screw shaft 32 is the first linear direction, and both ends of the screw shaft 32 are rotatably connected to both ends of the head pipe body 1. The screw driving member 33 may be a stepping motor externally disposed on the head tube body 1, and the output end 31 of the screw driving member 33 is fixedly connected to the screw 32. The second gear box 315 is equivalent to a nut, and is engaged with the lead screw 32 to linearly reciprocate in the first linear direction; the first gear box 314 is mounted on the second gear box 315, and the first gear box 314 and the second gear box 315 are mutually restricted in the freedom degree of displacement in the first linear direction and are connected in a sliding manner in the vertical direction; the gear 316 and/or the lead screw 32 is fixedly connected with the second gear box 315 in the upward direction, and the second moving mechanism 4 drives the second gear box 315 to move up and down, so that the movement of the gear 316 in the upward and downward direction is controlled.

In the embodiment of the present invention, the first gear box 314 includes an upper box body 3141 and a lower box body 3142, the lower end of the upper box body 3141 is in a partially open or completely open state, the upper end of the lower box body 3142 is in a partially open or completely open state, the lower end of the upper box body 3141 is communicated with the upper end of the lower box body 3142, two opposite ends of the upper shell 14 in the first linear direction have side walls, the guide rod 311 penetrates through the side walls of the upper box body 3141, and two opposite ends of the lower box body 3142 in the first linear direction are both open; the second movement mechanism 4 is provided for driving the lower end of the lower cassette 3142 to move in the up-down direction.

In the present embodiment, at least one of the two opposite ends of the first gear box 314 in the first linear direction is engaged with the lead screw 32. The upper end and the lower end of the second gear box 315 are provided with yielding holes for yielding the first gear box 314, so that the first gear box 314 is conveniently inserted into the second gear box 315, in other words, the second gear box 315 encloses a cavity, and the first gear box 314 passes through the cavity. Further, the lead screw 32 penetrates through the lower box 3142, and the two open ends of the lower box 3142 avoid interference with the lead screw 32. The width of the lower end surface of the lower box 3142 is larger than the diameter of the lead screw 32, so that the area of the lower box 3142 in contact with the second movement mechanism 4 is larger, which is beneficial to the arrangement of the position and type of the second movement mechanism 4. The lower end of the lower case 3142 partially protrudes from the upper case 3141.

In the embodiment of the present invention, one of the first gear box 314 and the second gear box 315 has a sliding block 3143, and the other has a sliding groove 3151 for the sliding block 3143 to slide and fix. In one embodiment, the slider 3143 is disposed on the first gear box 314, and the sliding groove 3151 is disposed on a side wall of the second gear box 315; preferably, the second gear box 315 is provided with a sliding groove 3151 at each of two opposite ends in the second linear direction, and the first gear box 314 is provided with a sliding block 3143 at each of two opposite ends in the second linear direction, which can improve the stability between the first gear box 314 and the second gear box 315.

In the embodiment of the present invention, the upper end of the first gear box 314 is provided with an abdicating groove 3144, the abdicating groove 3144 penetrates through two side surfaces of the first gear box 314 in the second linear direction and is communicated with an inner cavity of the first gear box 314, and the gear 316 is partially or completely located in the abdicating groove 3144.

In the embodiment of the present invention, the second motion mechanism 4 includes a cam 53 and a cam driving member 54, the cam 53 extends along the first linear direction, two ends of the cam 53 are respectively and rotatably connected to the head tube body 1, the cam driving member 54 can adopt a stepping motor, an output shaft of the cam driving member 54 is fixedly connected to an end of the cam 53, and the cam 53 is used for driving the cam 53 to rotate. A surface of the cam 53 is in contact with the output end 31, and the cam 53 is configured to drive the gear 316 in the up-down direction during the rotation. Specifically, the cam 53 has connecting shafts at both ends thereof for connecting with the head pipe body 1 or the cam driver 54. The main body portion of the cam 53 has a major axis and a minor axis, and sliding friction is generated between the surface of the cam 53 and the lower end surface of the first gear case 314 during rotation thereof. Preferably, the gear 316 engages the rack 21 when the major axis of the cam 53 contacts the first gear box 314, and the output 31 is completely below the rack 21 when the minor axis of the cam 53 contacts the first gear box 314.

As shown in fig. 5, an embodiment of the present invention further provides a combustion apparatus for a water heater, including a fire grate 6, an ion induction needle 7 and a gas distributor as described above, where the gas outlet nozzles 13 are in one-to-one correspondence with the fire grate 6, the ion induction needle 7 is used to detect flames of the fire grate 6 and is arranged in one-to-one correspondence with the fire grate 6, in this embodiment, a single fire grate 6 is vertically arranged, and the ion induction needle 7 is arranged at an upper end of the fire grate 6.

Please refer to fig. 1-7 for understanding. The embodiment of the invention also provides a fuel gas distribution method for the water heater, which is realized by adopting the combustion device for the water heater, and comprises the following steps:

s10, detecting the flame of the fire grate 6 in a combustion state through an ion induction needle 7 according to frequency and obtaining an induction current value, wherein the ion induction needle 7 can detect the flame once every 100 milliseconds, the air outlet sectional area of the first type fire grate which is not in a preset standard current interval is adjusted one by one, the air outlet sectional area of the first type fire grate which is lower than the lower limit of the standard current interval is increased, and the air outlet sectional area of the first type fire grate which is higher than the upper limit of the standard current interval is decreased; adjusting the air outlet sectional area corresponding to each first type fire exhaust row until the induction current value is in a standard current interval;

and S20, controlling the water heater to enter a normal combustion mode.

Specifically, the number of fire rows 6 to be burned and which fire rows 6 to be burned are controlled by a gas proportional valve at the front end of the gas distributor, which can be realized by the prior art and will not be described in detail.

The standard current interval differs according to the type and the area of the fuel gas, and in one embodiment, the standard current interval may be 7-13 milliamperes, and indeed, in other embodiments, the specific range of the standard current interval may be different.

The combustion state of flame is different according to different current values fed back and output by the ion induction needle 7, such as: when the current detected and obtained by the ion induction needle 7 is smaller than the lower limit of the standard current interval, the gas quantity is insufficient (or the gas quantity is understood as excess air), and the gas quantity is visually embodied as short flame, namely yellow flame; when the current value detected by the ion induction needle 7 is larger than the standard current interval, the gas is excessive (or the air quantity is insufficient), and the gas can be visually reflected as flame.

According to the invention, the flame condition of the corresponding fire row 6 is output through each ion induction needle 7, so that the combustion condition of each fire row 6 is comprehensively known, and further, how each fire row 6 is adjusted next can be judged so that the flame of each fire row 6 is in a better state. When the induction current value is not in the preset standard current interval, there are various ways of controlling the induction current value to be in the standard current interval, one way is to adjust the air amount, and the other way is to adjust the gas amount, and in the other way, the air amount and the gas amount are adjusted at the same time. The invention is based on the idea of adjusting the gas quantity to control the induction current value to be within the standard current interval.

According to the invention, the corresponding air outlet sectional areas of the first type of fire rows are adjusted one by one until the induction current values of the fire rows 6 are within the standard current interval, so that the flame is in a better combustion state, the combustion efficiency of gas is optimized, and resources are saved. Meanwhile, the gas distribution method for the water heater adjusts the gas quantity supplied to the fire grate 6 according to the flame condition, so that the gas distribution method for the water heater can be suitable for any gas, and when the gas type is switched, the water heater can automatically adapt to different types of gas without professional door-to-door operation and disassembly and assembly of the water heater.

In the embodiment of the present invention, in step S10, when the fire row of the first type of fire is adjusted, the ion sensing pin 7 is controlled to detect and obtain a primary sensing current value every time the rack 21 moves by N teeth.

In the embodiment of the present invention, step S10 specifically includes the following steps:

s11, detecting the flame of the fire grate 6 in the combustion state through the ion induction needle 7, obtaining an induction current value, identifying a first type fire grate of which the induction current value is not in a preset standard current interval, if the first type fire grate does not exist, executing a step S20, otherwise executing a step S12.

S12, the control output 31 is located at a first type fire grate. In detail, the control output end 31 is located at the air outlet nozzle 13 corresponding to the first-type fire exhaust row on the left side or the right side; in other words, the adjustment of the fire rows of the first type is carried out one by one. In operation, the screw 32 of the first moving mechanism 3 is controlled to act, so that the second gear box 315 drives the first gear box 314 and the gear 316 to move to the first fire grate on the left side or the right side.

And S13, controlling the second motion mechanism 4 to drive the gear 316 to move towards the rack 21 until the gear 316 is meshed with the rack 21. Specifically, when the cam driver 54 is controlled to rotate the cam 53, the cam 53 pushes up the second gear box 315, and the surface of the cam 53 corresponding to the long axis thereof comes into contact with the lower end surface of the first gear box 314, the gear 316 engages with the rack 21, and the cam driver 54 is controlled to stop operating.

S14, the first movement mechanism 3 is controlled to rotate the drive gear 316, and the rack 21 is moved by N teeth, and the process returns to step S11. N may be 1, that is, the step S11 is returned after every movement of the rack 21, so that extremely high gas control accuracy is obtained. Specifically, the control guide rod driver 313 drives the guide rod 311 to rotate the gear 316, and the step S11 is returned directly after the rack 21 moves by N teeth or the step S11 is returned after the gear 316 is controlled to be disengaged from the rack 21 by the second motion mechanism 4.

In addition, the step S12 may further include the following steps:

s121, judging whether the gear 316 is meshed with the rack 21 corresponding to the non-first-type fire grate, if so, controlling the gear 316 to be separated from the rack 21 through the second motion mechanism 4, and further controlling the output end 31 to be positioned at the first left or right first-type fire grate, otherwise, executing the step S122;

s122, judging whether the output end 31 is meshed with the rack 21 corresponding to the first left or right first-type fire discharge row, if so, executing the step S13, otherwise, controlling the output end 31 to be positioned at the air outlet nozzle 13 corresponding to the first left or right first-type fire discharge row and then executing the step S13.

In the embodiment of the present invention, step S20 specifically includes the following steps:

s21, detecting the combustion load according to the frequency, when the heat load is judged to be reduced, the requirement of the water heater for the gas is reduced, controlling the gas distributor to gradually reduce the air outlet sectional area of the burning fire row 6, and adjusting and controlling the rotating speed of a fan for supplementing air according to the air-fuel ratio prestored in the water heater until the air outlet amount of the gas distributor is matched with the combustion load; when the combustion load is judged to be increased, the gas distributor is controlled to increase the gas outlet sectional area of the burning fire row 6 one by one, and meanwhile, the rotating speed of the fan is adjusted according to the air-fuel ratio until the gas outlet quantity of the gas distributor is matched with the combustion load.

Specifically, the combustion load of the water heater is calculated by combining parameters of the water heater, such as water inlet temperature, water outlet temperature, water inlet pressure, water outlet pressure, etc., and the combustion load can be realized by the prior art, which is not described in detail herein.

When the gas distributor is controlled to gradually reduce the air outlet cross-sectional area of the burning fire rows 6, the gas distributor is adjusted from the first burning fire row 6 on the left side or the right side:

when adjusting one fire row 6, the output end 31 is controlled to be positioned at the gas outlet nozzle 13 corresponding to the fire row 6 through the first movement mechanism 3, the gear 316 is controlled to be meshed with the rack 21 through the second movement mechanism 4, the rack 21 is driven to move by the guide rod 311 for 1 or more teeth, then the combustion load is detected again directly or after the gear 316 is controlled to be separated from the rack 21 through the second movement mechanism 4, if the combustion load is still low, the output end 31 is controlled to move to the adjacent fire row 6, the actions are repeated, and after each fire row 6 is adjusted for one round, the output end 31 is adjusted for each fire row 6 one by one according to the operation until the gas outlet amount of the gas distributor is matched with the combustion load. It is noted that during this adjustment it may be relevant that one or more of the fire rows 6 are closed.

When the gas distributor is controlled to increase the air outlet cross-sectional area of the burning fire rows 6 one by one, the gas distributor is adjusted one by one from the first burning fire row 6 on the left side or the right side:

when adjusting one fire row 6, controlling the output end 31 to be positioned at the gas outlet nozzle 13 corresponding to the fire row 6 through the first motion mechanism 3, controlling the gear 316 to be meshed with the rack 21 through the second motion mechanism 4, driving the rack 21 to move by 1 or more teeth through the guide rod 311, and then directly detecting the combustion load again, or controlling the gear 316 to be separated from the rack 21 through the second motion mechanism 4 and then detecting the combustion load, if the combustion load is still high at the moment, controlling the output end 31 to move to the adjacent fire row 6 and then repeating the actions, and after each fire row 6 is adjusted by one wheel, adjusting each fire row 6 one by one again according to the operation from the position of the output end 31 until the gas outlet amount of the gas distributor is matched with the combustion load; if the air outlet cross section areas corresponding to all burning fire rows 6 are at the maximum value, but the burning load is still large, a new fire row 6 is started, and the air outlet cross section area corresponding to the fire row 6 is adjusted until the air outlet quantity of the fuel gas distributor is matched with the burning load.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A gas distributor, comprising:

the first movement mechanism is provided with an output end used for outputting movement along the first linear direction, the output end is provided with a gear, the gear is set to be capable of moving to a position corresponding to any one of the racks up and down, the opening degree of the air outlet nozzle is adjusted by controlling the gear to drive the racks to move linearly along a second linear direction, and the second linear direction is perpendicular to the first linear direction;

2. The gas dispenser of claim 1, wherein said conical valve includes a stem and a conical valve core secured to an end of said stem, said rack being disposed on said stem.

3. The gas dispenser of claim 2, wherein said valve stem has a projection extending radially outwardly therealong, said projection extending in an axial direction of said valve stem, said rack being located on said projection;

and/or the rack part extends into the air outlet nozzle;

4. The gas distributor of claim 2, wherein said output end further comprises a guide rod extending in said first linear direction and a guide rod driver, said guide rod driver being configured to drive said guide rod in rotation; the gear and the guide rod are arranged in sliding connection in a first linear direction and are mutually limited in the circumferential direction of the guide rod.

5. A gas distributor according to claim 4, wherein one of said guide rod and said gear has a guide slot and the other has a guide block, said guide slot and said guide block being arranged in sliding connection in a first linear direction and being mutually limited in the circumferential direction of the guide rod.

6. The gas distributor of claim 4, wherein said output further comprises a first gear box and a second gear box; the first movement mechanism also comprises a lead screw fixed on the front tube body and a lead screw driving piece used for driving the lead screw to rotate; the second gear box is arranged to move along a first linear direction along with the rotation of the lead screw; the first gear box is arranged to move along with the second gear box in a first linear direction and is arranged to drive the guide rod to move in the vertical direction under the driving of the second movement mechanism.

7. The gas distributor according to claim 6, wherein said first gear box comprises an upper box body and a lower box body, the lower end of said upper box body is communicated with the upper end of said lower box body, said guide rod penetrates through the side wall of said upper box body, and both ends of said lower box body opposite to each other in the first linear direction are open; the second movement mechanism is configured to drive the lower end of the lower box to move in the up-down direction.

8. The gas distributor of claim 6, wherein one of said first gear box and said second gear box has a slide block and the other has a slide slot for slidably securing said slide block.

9. The gas distributor of claim 6,

the upper end of the first gear box is provided with a yielding groove, the yielding groove penetrates through two side faces of the first gear box and is communicated with an inner cavity of the first gear box, and the gear is partially or completely positioned in the yielding groove;

and/or the guide rod penetrates through the upper end of the first gear box;

10. The gas distributor of claim 6, wherein the second gear box has a relief hole at upper and lower ends for relieving the first gear box;

11. The gas distributor of claim 1, wherein said second movement mechanism comprises a cam rotatably connected to said head pipe body and a cam driver for driving said cam in rotation; a surface of the cam is in contact with the output end, the cam being arranged to drive the gear in an up-down direction during rotation.

12. A combustion apparatus for a water heater, comprising a fire grate, an ion induction needle and a gas distributor according to any one of claims 1 to 11, wherein the gas outlet nozzle is communicated with the fire grate in a one-to-one correspondence, and the ion induction needle is used for detecting flames of the fire grate and is arranged in a one-to-one correspondence with the fire grate.

13. A gas distribution method for a water heater, which is implemented by using the burner for a water heater as claimed in claim 12, the gas distribution method comprising the steps of:

and S20, controlling the water heater to enter a normal combustion mode.

14. The fuel gas distribution method according to claim 13, wherein in step S10, the gas outlet cross-sectional area is adjusted to be high for the first type fire grate having an induced current value lower than the lower limit of the standard current interval, and the gas outlet cross-sectional area is adjusted to be low for the first type fire grate having an induced current value higher than the upper limit of the standard current interval.

15. The fuel gas distribution method according to claim 13, wherein in step S10, when the first type fire row is adjusted, the ion sensing needle is controlled to detect and obtain a sensing current value every time the rack moves by N teeth.

16. The fuel gas distribution method according to claim 15, wherein the step S10 specifically includes the steps of:

17. The fuel gas distribution method according to claim 16, wherein the step S12 specifically includes the steps of:

18. The fuel gas dispensing method of claim 15, wherein the ion sensitive probe is detected every 100 ms in step S10;

19. The fuel gas distribution method according to claim 13, wherein the step S20 specifically includes the steps of: