CN110307371A - Gas and gas valve and its control method - Google Patents
Gas and gas valve and its control method Download PDFInfo
- Publication number
- CN110307371A CN110307371A CN201810228986.6A CN201810228986A CN110307371A CN 110307371 A CN110307371 A CN 110307371A CN 201810228986 A CN201810228986 A CN 201810228986A CN 110307371 A CN110307371 A CN 110307371A
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- gas
- valve
- segment
- flow
- detecting element
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Flow Control (AREA)
Abstract
A kind of gas, include a burner, a gas valve and a control device, wherein gas valve includes a valve body, a flow regulating part, a hot diaphragm type flux detecting element and a stepper motor, valve body is connected to burner and a gas source, and flow regulating part is driven by stepper motor and changes the gas flow for being circulated to burner.Hot diaphragm type flux detecting element is set to valve body and there is an end of probe to be exposed to outlet passageway.Control device executes the control method of gas valve, and the gas flow of outlet passageway is detected by flux detecting element；The gas flow measured and a predetermined gas flow are compared, and drive flow regulating part according to comparison result control stepper motor, gas flow measured by flux detecting element is made to be maintained at predetermined gas flow.Whereby, gas flow can be maintained at stabilization.
Description
Technical field
The present invention is related with gas；Particularly relate to a kind of gas that can stablize gas flow and gas valve and
Its control method.
Background technique
Gas is most commonly used for heating device, compared to the heating device of electrothermal, heat caused by gas of burning
The thermal energy generated using electric power can be greater than, and heating time and reaction time are fast compared with electric heating device.
Existing gas 1 include a burner 10, a gas valve 12 and a pressure regulator 14 (regulator or
Claim voltage-stablizer).Burner 10 generates flame to the gas that burns；Gas valve 12 is connected to burner 10, with for manually or electrically
Mode adjust output to burner 10 gas flow；14 one end of pressure regulator connects gas valve 12, other end connection one
Gas source 16 (such as liquid gas barrel or natural gas gas pipe).
Existing gas 1 must be by pressure regulator 14 come so that gas source is input to the gas pressure of gas valve 12
Power maintains to stablize, however, when the pressure in gas source 16 is less than certain pressure, it will so that watt that pressure regulator 14 is exported
This pressure transient.Since gas valve 12 is to make to adjust the gas flow passed through to change the aperture of its valve port, if input watt
The gas pressure of this valve 12 is unstable, it will causes gas flow unstable, and then influences the efficiency of combustion of burner 10.
Summary of the invention
In view of this, having steady the purpose of the present invention is to provide a kind of gas and gas valve and its control method
Export the effect of defeated gas flow.
In order to achieve the above objectives, a kind of gas valve provided by the invention includes a valve body, a flow regulating part, a heat
There is an air intake, a gas outlet, one to enter gas channel and be connected to this to enter gas for membrane type flux detecting element and a driver, the valve body
Mouth, an outlet passageway is connected to the gas outlet and a valve port is located at this and enters between gas channel and the outlet passageway；The flow regulating part
It is movably arranged at the valve body and is located at the valve port, which is driven and changed the opening degree of the valve port；
The hot diaphragm type flux detecting element is set to the valve body, which has an end of probe, the end of probe packet
It includes a hotting mask resistance and is exposed to the outlet passageway, to detect the gas flow by the outlet passageway；The driver is set to
The valve body and the flow regulating part is connected, which receives a control signal to drive the flow regulating part mobile.
The control method of gas valve provided by the invention, wherein the air intake is for connecting a gas source, gas outlet connection
One burner；The control method comprises the steps of control driver drives flow rate adjustment feature, opens the valve port；It is logical
Cross the gas flow that the flux detecting element detects the outlet passageway；By Gas-Flow measured by the hot diaphragm type flux detecting element
Amount is compared with a predetermined gas flow, and controls the driver drives flow regulating part according to comparison result, detects the flow
It surveys gas flow measured by element and is maintained at the predetermined gas flow.
A kind of gas provided by the invention includes a burner, a gas valve and a control device, wherein the burning
Device generates flame to the gas that burns；The gas valve include a valve body, a flow regulating part, a hot diaphragm type flux detecting element with
One driver, wherein the valve body enters gas channel with an air intake, a gas outlet, one and is connected to the air intake, outlet passageway company
Lead to the gas outlet and a valve port is located at this and enters between gas channel and the outlet passageway；Wherein, the air intake is for connecting a gas
Source, the gas outlet are connected to the burner；The flow regulating part is movably arranged at the valve body and is located at the valve port, the flow
Regulating part is driven and is changed the opening degree of the valve port；The hot diaphragm type flux detecting element is set to the valve body, the hot diaphragm type
Flux detecting element has an end of probe, which includes that a hotting mask resistance is exposed to the outlet passageway, passes through to detect
The gas flow of the outlet passageway；The driver is set to the valve body and connects the flow regulating part, which receives a control
Signal processed is to drive the flow regulating part mobile；The control device is electrically connected the hot diaphragm type flux detecting element and the driving
Device, the control device export the control signal according to a predetermined gas flow to control the driver drives flow regulating part,
Gas flow measured by the hot diaphragm type flux detecting element is set to be maintained at the predetermined gas flow.
It can be accurately and quickly effect of the invention is that being set to outlet passageway by hot diaphragm type flux detecting element
The variation of gas flow, and then the foundation as control stepper motor are detected, no longer needing to setting pressure regulator can make to lead to
The gas flow for crossing the output of gas valve can be maintained at stabilization, effectively increase the accuracy of control gas flow and reduce gas device
The cost of tool.
Detailed description of the invention
Fig. 1 is existing gas schematic diagram.
Fig. 2 is the gas schematic diagram of first preferred embodiment of the invention.
Fig. 3 is the gas valve schematic diagram of above preferred embodiment.
Fig. 4 is the heat pattern flux detecting element schematic of above preferred embodiment.
Fig. 5 is that the rectifying component of above preferred embodiment is set to the schematic diagram in pipe fitting.
Fig. 6 is the gas valve control method flow chart of above preferred embodiment.
Fig. 7 is the gas schematic diagram of second preferred embodiment of the invention.
Fig. 8 is the gas valve schematic diagram of third preferred embodiment of the invention.
Fig. 9 and Figure 10 is the flow regulating part perspective view of third preferred embodiment of the invention.
Figure 11 is the gas valve schematic diagram of four preferred embodiment of the invention.
Figure 12 is the gas valve schematic diagram of fifth preferred embodiment of the invention.
[main element]
1 gas
10 burner, 12 gas valve, 14 pressure regulator
16 gas sources
2 gas
20 burner, 22 igniter, 24 flame detecting part
26 gas valve, 28 valve body, 30 ontology
301 air intakes 303 enter 304 valve port of gas channel
305 interface channel, 32 pipe fitting 32a screwed pipe
322 outlet passageway 322a first segment of 32b outer tube
324 gas outlet of 322b second segment 322c third section
33 sealing rings
34 flow regulating part, 36 transmission mechanism, 38 hot diaphragm type flux detecting element
40 substrate 40a bridge circuit of 38a end of probe
402 hotting mask resistance 404 compensate 406,408 resistance of resistance
421 first node, 422 second node, 423 third node
424 fourth node, 44 signal line group, 48 rectifying component
482 subchannel, 50 stepper motor, 502 shaft
52 control device, 522 amplifying circuit
P gas pipeline G gas source F gas air-flow
3 gas
54 mixer, 56 air blower
58 gas valves
60 valve body, 62 ontology, 622 air intake
624 enter 626 valve port of gas channel, 628 interface channel
64 pipe fitting, 642 outlet passageway, 644 gas outlet
66 flow rate adjustment feature, 661 axis hole, 662 first stomata
663 second stomata, 664 first approaching channel, 665 second approaching channel
68 70 stepper motor of hot diaphragm type flux detecting element, 702 shaft
72 gas valves
74 pipe fitting, 742 outlet passageway 742a first segment
76 rectifying component of 742b second segment
78 gas valves
80 pipe fitting, 802 outlet passageway 802a first segment
82 rectifying component of 802b second segment 802c third section
Specific embodiment
For that can be illustrated more clearly that the present invention, now lifts preferred embodiment and cooperate attached drawing detailed description is as follows.It please join Fig. 2 extremely
Shown in Fig. 5, it is the gas 2 of first preferred embodiment of the invention, is detectd comprising a burner 20, an igniter 22, a flame
Part 24, a gas valve 26 and a control device 52 are surveyed, gas 2 can appoint in the present embodiment for gas oven, fireplace, water heater etc.
What gas heating device.
The burner 20 generates flame to the gas that burns.The igniter 22 is located at by the burner 20, the igniter 22
It is controlled and the opposite burner 20 generation spark, to light the gas of the output of spontaneous combustion burner 20.The flame detecting part 24 is located at
By the burner 20, to detect flame, flame detecting part 24 can be thermocouple or flame inductive needle.
The gas valve 26 is set on the gas pipeline P for being connected to the burner.The gas valve 26 controlled and open or
Gas pipeline P is blocked, and is controlled and adjusted the output to the gas flow of the burner 20.In the present embodiment, the gas
Valve 26 includes a valve body 28, a flow regulating part 34, a hot diaphragm type (hot film) flux detecting element 38 and one with stepping horse
Up to the driver for 50, wherein there is the valve body 28 air intake 301, a gas outlet 324, one to enter the connection of gas channel 303 should
Air intake 301, an outlet passageway 322 are connected to the gas outlet 324 and a valve port 304 and are located at that this enters gas channel 303 and the outlet leads to
Between road 322, wherein the air intake 301 is connected to the burner 20 for connecting a gas source G, the gas outlet 324.The present embodiment
In, which is directly connected to the gas source via gas pipeline P, and between the air intake 301 and gas source G not
Pressure regulator 14 used in existing gas 1 (regulator or voltage-stablizer) is set.
In the present embodiment, which includes an ontology 30 and a pipe fitting 32, which has the air intake 301, is somebody's turn to do
Enter gas channel 303, the valve port 304 and a connection channel 305, and the valve port 304 is located at this and enters gas channel 303 and the interface channel
Between 305；The pipe fitting 32 is connected to the interface channel 305, and the pipe fitting 32 has the outlet passageway 322 and the gas outlet 324.
The outlet passageway 322 have a first segment 322a, a second segment 322b and a third section 322c, first segment 322a be located at this
Between two sections of 322b and third section 322c, and first segment 322a is a cone section, internal diameter from the third section 322c toward this
The direction of two sections of 322b is tapered；Second segment 322b is one isometrical section between first segment 322a and the gas outlet 324.
The interface channel 305 has internal screw thread；The pipe fitting 30 includes the screwed pipe 32a and an outer tube 32b being connected, should
Screwed pipe 32a is in conjunction with the internal screw thread of the interface channel 305；Outer tube 32b has at least part of second segment 322b, and
Outer tube 32b is located at except the ontology 30, which is set to outer tube 32b.More specifically, this is outer
Pipe 32b has wall surface recessed formation of the shrinkage pool 326 from second segment 322b.In the present embodiment, outer tube 32b forms one
Portion, such as outer peripheral surface are the head in six faces, for turning so that screwed pipe spiral shell 32a is entered interface channel 305, and outer tube 32a and ontology
It is equipped with sealing ring 33 between 30, gas is avoided to leak outside.
The flow regulating part 34 is movably arranged at the valve body 28 and is located at the valve port 304, the flow regulating part 34
It is in this present embodiment valve plug, one transmission mechanism 36 of connection and transmission mechanism 36 are driven and changed the unlatching of the valve port 304
Degree.
It please cooperate Fig. 3 and Fig. 4, which is set to the valve body 28, the hot diaphragm type flux detecting
There is element 38 an end of probe 38a to be exposed to the outlet passageway 322, to detect the gas flow by the outlet passageway 322.
The hot diaphragm type flux detecting element 38 includes a substrate 40 and a hotting mask resistance 402 and a compensation resistance 404 in the present embodiment
It is set on the substrate 40, the hotting mask resistance 402 and the compensation resistance 404 are exposed to the outlet passageway 322, end of probe 38a
Including the hotting mask resistance 402 and the compensation resistance 404, the resistance value of the hotting mask resistance 402 is less than the resistance of the compensation resistance 404
Value.
It is exposed in the outlet passageway 322 in fact, end of probe 38a can also only include hotting mask resistance 402.The present embodiment
In, which is located in the shrinkage pool 326 and its end of probe 38a is exposed to second segment 322b, the heat
Membrane type flux detecting element 38 passes through the outer tube 32b of pipe fitting 32 via a signal line group 44 and can be electrically connected to external electricity
Road.
Other two resistance 406,408 and the hotting mask resistance 402 and 404 shape of compensation resistance are additionally provided on the substrate 40
At a bridge circuit 40a, the hotting mask resistance 402 and 404 one end of compensation resistance connect a first node 421, the first node
421 for connecting a voltage source, and in addition one end of two resistance 406,408 connects a second node 422, which supplies
Connect a ground terminal.After voltage fed, hotting mask electricity group generates thermal energy, when gas air-flow F passes through the stream of the hotting mask resistance 402
When amount increases, the degree that hotting mask resistance 402 is cooled increases, and resistance value reduces therewith, to keep bridge circuit 40a balance
The electric current that needs increases, therefore the electric current compensated on resistance 404 increases accordingly, and allows the temperature recovery of hotting mask resistance 402；Otherwise also
So.Whereby, the electric current for compensating resistance 404 has corresponding proportionate relationship with gas flow, therefore, in bridge circuit 40a
Voltage and gas flow between 424 two nodes of third node 423 and fourth node will be in proportionate relationship.In the present embodiment,
First to fourth node 421~424 is connected to outside valve body 28 by the signal line group 44.Third node 423 and Section four
Point 424 is connected to an amplifying circuit 522, which is located at outside the valve body 28, to by third node 423 and Section four
Voltage amplification between point 424.In fact, amplifying circuit 522 also may be disposed on the substrate 40.
In order to increase the accuracy of detecting gas flow, the gas valve 26 of the present embodiment further includes a rectifying component 48, setting
In the third section 322c of the outlet passageway 322 of the pipe fitting 32, make end of probe 38a of the hot diaphragm type flux detecting element 38
Between the rectifying component 48 and the gas outlet 324.The rectifying component 48 has multiple subchannels 482 (Fig. 3 and Fig. 5 reference), makes watt
This air-flow smoothly passes through end of probe 38a, reduces and detects error caused by turbulent flow.
The stepper motor 50 is set to the valve body 28 and connects the flow regulating part 34, which receives a control
Signal is to drive the flow regulating part 34 mobile；In the present embodiment, the shaft 502 of stepper motor 50 is connected by the transmission mechanism 36
Connect flow regulating part 34.Stepper motor 50 shaft 502 be rotate forward or reverse when, can drive flow regulating part 34 along turn
The axial movement of axis 502, and then change the opening degree of valve port 304.
The control device 52 is electrically connected the igniter 22, the flame detecting part 24, the hot diaphragm type flux detecting element 38
With the stepper motor 50, the control device 52 includes the voltage source and the ground terminal and by the signal line group in the present embodiment
44 supply electricity to the bridge circuit 40a on the substrate 40 of the hot diaphragm type flux detecting element 38, and the control device 52 includes this
Amplifying circuit 522, and bridge circuit 40a is electrically connected to receive the third section of bridge circuit 40a by the signal line group 44
Voltage between point 423 and fourth node 424.
The control method of gas valve 26 of the control device 52 to carry out the present embodiment, if being not used in gas 2
When (in the pent situation of valve port), before carrying out control method, control device 52 first controls 22 pairs of igniter burnings
Device 10 generates spark.
Then the control method of the gas valve is carried out, method includes the following steps shown in fig. 6:
The output control signal of control device 52 controls the stepper motor 50 and drives the flow regulating part 34, makes the valve port 304
It opens, gas is allowed to pass through；After gas ignites, control device 52 can be learnt watt by the electric signal of 24 feedback of flame detecting part
This has been ignited.
The gas flow of the outlet passageway 322 is detected by the hot diaphragm type flux detecting element 38；In the present embodiment, the control
The bridge circuit 40a of the hot diaphragm type flux detecting element 38 voltage exported is converted to corresponding Gas-Flow by device 52 processed
Amount.
The control device 52 is according to Gas-Flow measured by a predetermined gas flow and the hot diaphragm type flux detecting element 38
Amount output control signal controls the stepper motor 50 and drives the flow regulating part 34, surveys the hot diaphragm type flux detecting element 38
The gas flow obtained is maintained at the predetermined gas flow.More specifically, the control device 52 is by the hot diaphragm type flux detecting element
Measured gas flow is compared with the predetermined gas flow, is controlled the stepper motor 50 according to comparison result and is driven the flow tune
Part 34 is saved, gas flow measured by the hot diaphragm type flux detecting element 38 is made to be maintained at the predetermined gas flow.
In the present embodiment, the corresponding predetermined calorific value of the predetermined gas flow, the gas flow for being defeated by burner 20 is should
When predetermined gas flow, burner 20 can be allowed to generate the predetermined calorific value.
Whereby, even if the pressure transient of gas source G output or pressure are too small, the variation of gas flow is caused, all may be used
Stablize the gas flow exported via gas valve 26 by the flow regulating part 34 is controlled and be maintained at this predetermined watt
This flow.Due to use hot diaphragm type flux detecting element 38 have the advantages that can with fast reaction gas flow, Ke Yiyong
In control stepper motor 50 in real time, gas flow is allow rapidly to be maintained at the predetermined gas flow.Due to hot diaphragm type stream
Amount detecing element 38 is set between valve port 304 and gas outlet 324, and therefore, gas flow is adjusted via flow regulating part 34
It crosses, the gas flow by hot diaphragm type flux detecting element 38 can be allowed relatively stable.
Fig. 7 show the gas of second preferred embodiment of the invention, has and is approximately identical to first embodiment
Structure, unlike, the present embodiment further includes a mixer 54 and an air blower 56, the mixer 54 be set to gas valve 26 and
Between burner 20.56 machine 56 of air blower is electrically connected control device 52 and its air outlet connects mixer 54.Control device 52
A corresponding desired speed and a predetermined gas flow are generated according to a predetermined calorific value, wherein control device 52 is according to desired speed value control
The revolving speed of the motor of the air blower 56 is made, and according to measured by the predetermined gas flow and the hot diaphragm type flux detecting element 38
Gas flow controls the stepper motor 50 and drives the flow regulating part 34, makes measured by the hot diaphragm type flux detecting element 38 watt
This flow is maintained at the predetermined gas flow.
Fig. 8 to Figure 10 show the gas valve 58 of third preferred embodiment of the invention, has similar first embodiment
The framework of gas valve 26, including a valve body 60, a flow rate adjustment feature 66, a hot diaphragm type flux detecting element 68 and a stepper motor
70.The valve body 60 of the present embodiment includes an ontology 62 and a pipe fitting 64, and there is ontology 62 air intake 622, one to enter gas channel
624, a valve port 626 and a connection channel 628；The structure of pipe fitting 64 is identical with the first embodiment with outlet passageway 642 and goes out
Port 644.The flow rate adjustment feature 66 of the present embodiment is to close son, is rotatablely arranged in ontology 62, flow rate adjustment feature 66 has
Axis hole 661, one first stomata 662, one second stomata 663, one first approaching channel 664 and the second approaching channel 665, the first, second stomata
662,663 communicate with axis hole 661, and the aperture of the first stomata 662 is greater than the aperture of the second stomata 663, the first approaching channel 664, second
Approaching channel 665 is between the first, second stomata 662,663, and 664 one end of the first approaching channel is connected to the first stomata 662, the second approaching channel
665 one end are connected to the second stomata 663.In fact, as long as flow rate adjustment feature 66 at least has axis hole 661, the first stomata 662 and the
One approaching channel 664.
Hot diaphragm type flux detecting element 68 is identical with the first embodiment, and is set on valve body 60.Stepper motor 70 is set to
On ontology 62 and son is closed in the connection of the shaft 702 of stepper motor 70.Whereby, the gas valve 58 of the present embodiment can be applied equally to
In the gas 2 of one embodiment.
Figure 11 show the gas valve 72 of four preferred embodiment of the invention, has watt for being identical to first embodiment greatly
The structure of this valve 26, unlike, the first segment 742a's and second segment 742b of the outlet passageway 742 of the pipe fitting 74 of the present embodiment
Internal diameter is identical, i.e., outlet passageway 742 is identical to the internal diameter between hot diaphragm type flux detecting element 38 in rectifying component 76, whereby, can
Allow the more stable end of probe 38a for flowing through hot diaphragm type flux detecting element 38 of the air-flow of gas.
Figure 12 show the gas valve 78 of fifth preferred embodiment of the invention, has watt for being identical to first embodiment greatly
The structure of this valve 26, unlike, the first segment 802a's and second segment 802b of the outlet passageway 802 of the pipe fitting 80 of the present embodiment
Internal diameter is identical, and the third section 802c of outlet passageway 802 is cone section, and rectifying component 82 is located in first segment 802a.Outlet passageway 802
It is identical to the internal diameter between hot diaphragm type flux detecting element 38 in rectifying component 82, whereby, equally the air-flow of gas can be allowed more stable
Flow through the end of probe 38a of hot diaphragm type flux detecting element 38.
The outlet passageway 642 of the pipe fitting 64 of 3rd embodiment equally can be using the pipe fitting such as the four, the 5th embodiments
Structure.
The driver system of foregoing embodiments is by taking stepper motor as an example, in fact, proportioning valve also can be used in gas valve, such as
U.S. Patent Publication No. US20090206291A1.The driver of proportioning valve includes coil and magnet, drives stream with the effect of electromagnetism
Measure the opening degree that regulating part changes valve port.
According to the above, the present invention is set to outlet passageway by hot diaphragm type flux detecting element and can accurately and quickly detect
The variation of gas flow, and then the foundation as control stepper motor are measured, no longer needing to setting pressure regulator can make to pass through
The gas flow of gas valve output can be maintained at stabilization, effectively increase the accuracy of control gas flow and reduce gas
Cost.
The foregoing is merely preferably possible embodiments of the invention, apply description of the invention and claims such as
Made equivalence changes ought to be included in the scope of the patents of the invention.
Claims (19)
1. a kind of gas valve, includes:
There is one valve body an air intake, a gas outlet, one to enter that gas channel is connected to the air intake, an outlet passageway is connected to the outlet
Mouth and a valve port are located at this and enter between gas channel and the outlet passageway；
One flow regulating part is movably arranged at the valve body and is located at the valve port, which is driven and changed
The opening degree of the valve port；
One hot diaphragm type flux detecting element, is set to the valve body, which has an end of probe, the detection
End includes that a hotting mask resistance is exposed to the outlet passageway, to detect the gas flow by the outlet passageway；And
One driver is set to the valve body and connects the flow regulating part, which receives a control signal to drive this
Flow regulating part is mobile.
2. gas valve as described in claim 1, wherein the hot diaphragm type flux detecting element includes a substrate, and the hotting mask resistance
It is set on the substrate.
3. gas valve as described in claim 1 includes a rectifying component, is set in the outlet passageway, which detects
The end of probe for surveying element is located between the rectifying component and the gas outlet.
4. gas valve as claimed in claim 3, wherein the rectifying component has multiple subchannels.
5. gas valve as claimed in claim 3, wherein the outlet passageway has a first segment and a second segment, first section
Between the rectifying component and the second segment, the second segment is between the first segment and the gas outlet；The hot diaphragm type flux detecting
The end of probe of element is located at the second segment.
6. gas valve as claimed in claim 3, wherein the first segment of the outlet passageway is identical as the internal diameter of the second segment.
7. gas valve as claimed in claim 5, wherein the valve body includes an ontology and a pipe fitting, which there is this to enter gas
Mouthful, this enter gas channel and a connection channel, and the valve port is located at this and enters between gas channel and the interface channel, which is connected to
The interface channel, and the pipe fitting has the outlet passageway and the gas outlet；The hot diaphragm type flux detecting element is set to the pipe fitting.
8. gas valve as claimed in claim 7, wherein the pipe fitting includes the screwed pipe and an outer tube being connected；The connection is logical
Road has an internal screw thread in conjunction with the screwed pipe；The outer tube has at least part of the second segment, and the outer tube is located at this
Except body, which is set to the outer tube.
9. gas valve as claimed in claim 8, wherein the outer tube has the wall surface of a shrinkage pool from the second segment recessed；The hotting mask
Formula flux detecting element is located in the shrinkage pool.
10. a kind of gas, includes:
One burner, to burn, gas generates flame；
One gas valve, including a valve body, a flow regulating part, a hot diaphragm type flux detecting element and a driver, in which:
There is the valve body air intake, a gas outlet, one to enter that gas channel is connected to the air intake, an outlet passageway is connected to the outlet
Mouth and a valve port are located at this and enter between gas channel and the outlet passageway；Wherein, the air intake is for connecting a gas source, the outlet
Mouth is connected to the burner；
The flow regulating part is movably arranged at the valve body and is located at the valve port, which is driven and change this
The opening degree of valve port；
The hot diaphragm type flux detecting element is set to the valve body, which has an end of probe, the detection
End includes that a hotting mask resistance is exposed to the outlet passageway, to detect the gas flow by the outlet passageway；
The driver is set to the valve body and connects the flow regulating part, which receives a control signal to drive the stream
It is mobile to measure regulating part；
One control device is electrically connected the hot diaphragm type flux detecting element and the driver, and the control device is according to one predetermined watt
This flow exports the control signal to control the driver drives flow regulating part, surveys the hot diaphragm type flux detecting element
The gas flow obtained is maintained at the predetermined gas flow.
11. gas as claimed in claim 10, wherein the hot diaphragm type flux detecting element includes a substrate, and the hotting mask
Resistance is set on the substrate.
12. gas as claimed in claim 10 includes a rectifying component, is set in the outlet passageway, the hot diaphragm type stream
The end of probe of amount detecing element is located between the rectifying component and the gas outlet.
13. gas as claimed in claim 12, wherein the rectifying component has multiple subchannels.
14. gas as claimed in claim 12, wherein the outlet passageway has a first segment and a second segment, this first
Between the rectifying component and the second segment, which is located between the first segment and the gas outlet section；The hot diaphragm type flow
The end of probe of detecing element is located at the second segment.
15. gas as claimed in claim 14, the wherein internal diameter phase of the first segment of the outlet passageway and the second segment
Together.
16. gas as claimed in claim 14, wherein the valve body includes an ontology and a pipe fitting, which enters with this
Port, this enter gas channel and a connection channel, and the valve port is located at this and enters between gas channel and the interface channel；Pipe fitting connection
In the interface channel, and the pipe fitting has the outlet passageway and the gas outlet；The hot diaphragm type flux detecting element is set to the pipe
Part.
17. gas as claimed in claim 16, wherein the pipe fitting includes the screwed pipe and an outer tube being connected；The company
Connecting road has an internal screw thread in conjunction with the screwed pipe；The outer tube has at least part of the second segment, and the outer tube is located at
Except the ontology, which is set to the outer tube.
18. gas as claimed in claim 17, wherein the outer tube has the wall surface of a shrinkage pool from the second segment recessed；It should
Hot diaphragm type flux detecting element is located in the shrinkage pool.
19. a kind of control method of gas valve as described in claim 1, wherein the air intake should go out for connecting a gas source
Port is connected to a burner；The control method comprises the steps of
The driver drives flow rate adjustment feature is controlled, the valve port is opened；
The gas flow of the outlet passageway is detected by the flux detecting element；
Gas flow measured by the hot diaphragm type flux detecting element is compared with a predetermined gas flow, and according to comparison result
The driver drives flow regulating part is controlled, gas flow measured by the flux detecting element is made to be maintained at the predetermined gas
Flow.
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| CN201810228986.6A CN110307371A (en) | 2018-03-20 | 2018-03-20 | Gas and gas valve and its control method |
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| CN201810228986.6A CN110307371A (en) | 2018-03-20 | 2018-03-20 | Gas and gas valve and its control method |
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| CN110307371A true CN110307371A (en) | 2019-10-08 |
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| CN201810228986.6A Pending CN110307371A (en) | 2018-03-20 | 2018-03-20 | Gas and gas valve and its control method |
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| CN (1) | CN110307371A (en) |
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| CN102353806A (en) * | 2011-06-24 | 2012-02-15 | 清华大学 | Temperature compensation circuit and method thereof for heat-sensitive flow rate sensor, and automatic adjusting method for power of heat-sensitive flow rate sensor |
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2018
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