CN107726394A - A kind of lower-discharge type range hood - Google Patents
A kind of lower-discharge type range hood Download PDFInfo
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- CN107726394A CN107726394A CN201710864392.XA CN201710864392A CN107726394A CN 107726394 A CN107726394 A CN 107726394A CN 201710864392 A CN201710864392 A CN 201710864392A CN 107726394 A CN107726394 A CN 107726394A
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- range hood
- discharge type
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- fire
- temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
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Abstract
The embodiment of the invention discloses a kind of lower-discharge type range hood, the lower-discharge type range hood includes：The main control unit and thermocouple sensor of interconnection, the blower fan being connected with main control unit, smoke deflector and air outlet check-valves；Thermocouple sensor, for detecting the temperature value in lower-discharge type range hood in real time；Main control unit; for collecting temperature value; temperature value according to collecting judge it is whether on fire inside lower-discharge type range hood, and judge lower-discharge type range hood inside it is on fire when start fire extinguishing scheme, judge lower-discharge type range hood inside it is on fire extinguished when start smoke exhaust ventilator protection scheme.It by the embodiment scheme, can in time detect whether on fire inside smoke exhaust ventilator, and quickly reduce smoke exhaust ventilator internal temperature, avoid the damage to caused by motor, wiring board and sprayed coating.
Description
Technical field
The present embodiments relate to cooking equipment designing technique, espespecially a kind of lower-discharge type range hood.
Background technology
Lower exhaustion type fume exhauster is because the distance of its smoking port and gas-cooker lampblack absorber more wall-mounted than tradition is closely a lot, user
It is easy to, because the big suction of cigarette machine sucks flare inside cigarette machine, cause absorption on cigarette machine inwall during cooking is cooked
Grease catching fire, if along with cigarette machine without fire prevention control, fan operation by more oxygen suck cigarette machine inside,
The combustion-supporting intensity of a fire causes fire.
Integrated kitchen range is mainly put out a fire by way of closing blower fan and smoke deflector at present, but have ignored air outlet public affairs
The oxygen-barrier of flue altogether, and motor and wiring board lamp fitting are long-term in high temperature environments, insulating materials and accessory will be caused
High temperature is intolerant to being damaged.
The content of the invention
The embodiments of the invention provide a kind of lower-discharge type range hood, can detect whether risen inside smoke exhaust ventilator in time
Fire, and smoke exhaust ventilator internal temperature is quickly reduced, avoid that motor, wiring board and sprayed coating are caused to damage.
In order to solve the above technical problems, the embodiment of the present invention adopts the following technical scheme that：
A kind of lower-discharge type range hood, the lower-discharge type range hood include：The main control unit and thermocouple sensor of interconnection,
Blower fan, smoke deflector and the air outlet check-valves being connected with main control unit；
Thermocouple sensor, for detecting the temperature value in lower-discharge type range hood in real time；
Main control unit, for collecting temperature value, judged according to the temperature value collected it is whether on fire inside lower-discharge type range hood,
And judge lower-discharge type range hood inside it is on fire when start fire extinguishing scheme, judge lower-discharge type range hood inside it is on fire
Start smoke exhaust ventilator protection scheme during extinguishing.
Alternatively, main control unit according to the temperature value collected judge inside lower-discharge type range hood whether it is on fire including：
The first temperature value collected is compared with default temperature threshold on fire；
When the first temperature value is more than or equal to temperature threshold on fire, second temperature value is gathered after default first duration that is delayed,
And the second temperature value collected is compared with temperature threshold on fire；
When second temperature value is more than or equal to temperature threshold on fire, judge on fire inside lower-discharge type range hood；When the second temperature
When angle value is less than temperature threshold on fire, judge not on fire inside lower-discharge type range hood.
Alternatively,
Main control unit, it is additionally operable on lower-discharge type range hood after electricity, whether detection blower fan is in running status, when detection air-out
When machine is not in running status, judge not on fire inside lower-discharge type range hood；When detection blowing machine is in running status, enter
Enter according to the temperature value that collects judge inside lower-discharge type range hood whether flow on fire.
Alternatively, main control unit starts fire extinguishing scheme when judging on fire inside lower-discharge type range hood and included：
Control blower fan out of service, and control smoke deflector and air outlet closure of check ring；
It is out of service in blower fan, after smoke deflector and air outlet closure of check ring, gather the 3rd temperature value, and be delayed default the
The 4th temperature value is gathered after two durations, calculates the first difference of the 3rd temperature value and the 4th temperature value, when the first difference is more than in advance
If the first temperature change threshold value when, determine that the intensity of a fire is controlled inside lower-discharge type range hood.
Alternatively, main control unit is additionally operable to：
The 4th temperature value is being gathered, and the 5th temperature value, the 5th temperature that will be collected are gathered after default 3rd duration that is delayed
Value is compared with the 4th temperature value；When the 5th temperature value is less than or equal to four temperature values, judge in lower-discharge type range hood
Portion is on fire to have extinguished.
Alternatively, main control unit judge lower-discharge type range hood inside it is on fire extinguished when start smoke exhaust ventilator protection
Scheme includes：
Control blower fan brings into operation, and controls smoke deflector and air outlet check-valves to open；
Brought into operation in blower fan, after smoke deflector and air outlet check-valves are opened, gather the 6th temperature value, and be delayed default the
The 7th temperature value is gathered after four durations, calculates the second difference of the 6th temperature value and the 7th temperature value, when the second difference is more than in advance
If second temperature change threshold when, determine that lower-discharge type range hood internal cooling is normal.
Alternatively, main control unit is additionally operable to：
Determine that lower-discharge type range hood internal cooling normally gathers the 8th temperature value afterwards, by the 8th temperature value collected with presetting
Reliability temperature threshold compare；When the 8th temperature value is less than reliability temperature threshold, judge that lower-discharge type range hood is in peace
Total state is simultaneously shut down.
Alternatively, main control unit judge lower-discharge type range hood inside it is on fire extinguished when start smoke exhaust ventilator protection
Scheme also includes：
When the second difference is less than or equal to second temperature change threshold, determine that common flue blocks or kitchen is on fire, and send
Alarm；And
When the 8th temperature value is more than or equal to reliability temperature threshold, the 9th temperature is gathered after the duration of blower fan continuous service the 5th
Value, the 9th temperature value collected is compared with reliability temperature threshold；When the 9th temperature value is less than reliability temperature threshold, sentence
It is in a safe condition and shut down to determine lower-discharge type range hood；When the 9th temperature value is more than or equal to reliability temperature threshold, judge
Lower-discharge type range hood failure, and alarm.
Alternatively, temperature threshold on fire includes：80 DEG C~90 DEG C；
First duration includes：3 seconds~5 seconds；
Second duration includes：3 seconds~7 seconds；
First temperature change threshold value includes：10 DEG C~20 DEG C；
3rd duration includes：3 seconds~5 seconds；
4th duration includes：50 seconds~70 seconds；
Second temperature change threshold includes：7 DEG C~15 DEG C；
5th duration includes：5~20 minutes；
Reliability temperature threshold includes：30 DEG C~40 DEG C.
Alternatively, thermocouple sensor is arranged in the smoke collecting chamber side wall of lower-discharge type range hood；
Smoke deflector is installed on the air inlet of exhaust fume collecting hood；
Air outlet check-valves is installed at the discharge pipe interface position of lower-discharge type range hood.
The beneficial effect of the embodiment of the present invention：
1st, the lower-discharge type range hood of the embodiment of the present invention includes：The main control unit and thermocouple sensor of interconnection and master
Control unit connected blower fan, smoke deflector and air outlet check-valves；Thermocouple sensor, for detecting lower-discharge type range hood in real time
Interior temperature value；Main control unit, for collecting temperature value, judged according to the temperature value collected be inside lower-discharge type range hood
It is no on fire, and start fire extinguishing scheme when judging on fire inside lower-discharge type range hood, judging inside lower-discharge type range hood
It is on fire to start smoke exhaust ventilator protection scheme when having extinguished.By scheme of the embodiment of the present invention, smoke pumping can be detected in time
It is whether on fire inside machine, and smoke exhaust ventilator internal temperature is quickly reduced, avoid that motor, wiring board and sprayed coating are caused to damage.
2nd, the main control unit of the embodiment of the present invention according to the temperature value collected judge inside lower-discharge type range hood whether
It is on fire including：The first temperature value collected is compared with default temperature threshold on fire；When the first temperature value is more than or waits
When temperature threshold on fire, gather second temperature value after default first duration of being delayed, and by the second temperature value collected with
Temperature threshold on fire compares；When second temperature value is more than or equal to temperature threshold on fire, judge in lower-discharge type range hood
Portion is on fire；When second temperature value is less than temperature threshold on fire, judge not on fire inside lower-discharge type range hood.The present invention is implemented
Whether example scheme can be risen by the way that lower-discharge type range hood internal temperature is detected and compared in real time to smoke exhaust ventilator inside
Fire carries out accurate judgement, and prevents the erroneous judgement sucked due to part flare without causing burning, is lampblack absorber interior fittings
Security protection is laid a good foundation.
3rd, the main control unit of the embodiment of the present invention is additionally operable on lower-discharge type range hood after electricity, and whether detection blower fan is in
Running status, when detection blowing machine is not in running status, judge not on fire inside lower-discharge type range hood；When detection air-out
When machine is in running status, into according to the temperature value that collects judge inside lower-discharge type range hood whether flow on fire.
Scheme of the embodiment of the present invention can further increase the accuracy of detection on fire by the detection to fan operation state.
4th, the main control unit of the embodiment of the present invention starts fire extinguishing scheme bag when judging on fire inside lower-discharge type range hood
Include：Control blower fan out of service, and control smoke deflector and air outlet closure of check ring；It is out of service in blower fan, smoke deflector and go out
After the closure of check ring of air port, the 3rd temperature value is gathered, and the 4th temperature value is gathered after default second duration of being delayed, calculates the
First difference of three temperature values and the 4th temperature value, when the first difference is more than default first temperature change threshold value, it is determined that under
The intensity of a fire is controlled inside row's formula smoke exhaust ventilator.Scheme of the embodiment of the present invention is closed smoke deflector and gone out by stopping fan operation
Air port check-valves, and then the oxygen completely cut off inside smoke exhaust ventilator with outside atmosphere circulates so that flare quickly puts out after lacking oxygen
Go out, play the effect structure of cigarette machine fire extinguishing；And further determine whether the intensity of a fire is controlled by temperature drop rate, it ensure that
Extinguishing effect.
5th, the main control unit of the embodiment of the present invention is additionally operable to：The 4th temperature value is being gathered, and default 3rd duration that is delayed
The 5th temperature value is gathered afterwards, and the 5th temperature value collected is compared with the 4th temperature value；When the 5th temperature value is less than or waits
When four temperature values, on fire inside lower-discharge type range hood extinguished is judged.It is further ensured that by the embodiment scheme
Extinguishing effect, it is ensured that on fire to extinguish completely.
6th, the main control unit of the embodiment of the present invention judge lower-discharge type range hood inside it is on fire extinguished when start take out
Lampblack absorber protection scheme includes：Control blower fan brings into operation, and controls smoke deflector and air outlet check-valves to open；Start in blower fan
Operation, after smoke deflector and air outlet check-valves are opened, the 6th temperature value is gathered, and gather after default 4th duration that is delayed the
Seven temperature values, the second difference of the 6th temperature value and the 7th temperature value is calculated, when the second difference becomes more than default second temperature
When changing threshold value, determine that lower-discharge type range hood internal cooling is normal.The embodiment scheme is again turned on leading cigarette after extinguishing on fire
Plate and air outlet non-return piece, start motor air-exhausting function, can quickly reduce cigarette machine internal temperature, avoid to motor, wiring board
Cause to damage with sprayed coating.
Brief description of the drawings
The present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is the lower-discharge type range hood composition frame chart of the embodiment of the present invention；
Fig. 2 is the thermocouple sensor schematic view of the mounting position of the embodiment of the present invention；
Fig. 3 is the smoke deflector schematic view of the mounting position of the embodiment of the present invention；
Fig. 4（a）For the discharge pipe interface position schematic diagram of the embodiment of the present invention；
Fig. 4（b）Side view when being opened for the non-return piece in the air outlet check-valves of the embodiment of the present invention；
Fig. 4（c）Side view when being closed for the non-return piece in the air outlet check-valves of the embodiment of the present invention；
Fig. 4（d）For the top view in the air outlet check-valves of the embodiment of the present invention；
Fig. 5 be the embodiment of the present invention lower-discharge type range hood inside whether determination methods flow chart on fire；
Extinguishing method flow charts of the Fig. 6 for the lower-discharge type range hood inside of the embodiment of the present invention after on fire；
Fig. 7 is the guard method flow chart after the lower-discharge type range hood internal firefighting of the embodiment of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing to the present invention
Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutually be combined.
Can be in the computer system of such as one group computer executable instructions the flow of accompanying drawing illustrates the step of
Perform.Also, although logical order is shown in flow charts, in some cases, can be with suitable different from herein
Sequence performs shown or described step.
Embodiment one
A kind of lower-discharge type range hood, as shown in figure 1, the lower-discharge type range hood includes：The main control unit 1 and heat of interconnection
Thermocouple sensor 2, the blower fan 3 being connected with main control unit 1, smoke deflector 4 and air outlet check-valves 5；
Thermocouple sensor 2, for detecting the temperature value in lower-discharge type range hood in real time；
Main control unit 1, for gathering the temperature value, judge whether risen inside lower-discharge type range hood according to the temperature value collected
Fire, and start fire extinguishing scheme when judging on fire inside lower-discharge type range hood, it is on fire inside judgement lower-discharge type range hood
Start smoke exhaust ventilator protection scheme when having extinguished.
In embodiments of the present invention, as shown in Fig. 2 thermocouple sensor 2 can be arranged at the collection of lower-discharge type range hood
In smoke chamber side wall；Purpose is that the thermocouple can detect the flare by being drawn into outside exhaust fume collecting hood in exhaust fume collecting hood in time, real
Existing carly fruit drop, early stage administer, and prevent flare propagating combustion from entering cabinet, and if it happens cabinet inside catches fire, and flue gas rises, heat
Thermocouple sensor 2 is arranged in smoke collecting chamber side wall, can equally meet identification of catching fire, and two-way flame reason can be taken into account；Simultaneously
Facilitate follow-up cleaning, by removing smoke collecting chamber face glass, burnisher can be used to enter the materials such as the greasy dirt on its surface
Row cleaning maintenance.As shown in figure 3, smoke deflector 4 can be installed on the air inlet of exhaust fume collecting hood.
In embodiments of the present invention, air outlet check-valves 5 can be installed on the air-out interface tube 6 of lower-discharge type range hood
Put place, the position of air-out interface tube 6 such as 4（a）It is shown.Such as Fig. 4（b）、4（c）、4（d）It is shown, can be with the structure of air outlet check-valves 5
Including 2 gear trains（Respectively master gear 51-1 and from gear 51-2）, non-return piece motor 52, non-return piece 53 and locating rotation
Axle 54；When non-return piece 53 is opened or closed to main control unit 1, non-return piece motor 52 drives master gear 51-1 to rotate, simultaneously main
Gear 51-1 drives and can be designed as synchronous motor, stepper motor from gear 51-2 synchronous axial systems, wherein motor type or subtract
Fast gear case motor etc., it is not limited for its particular type.This air outlet check-valves 5 can be installed on going out for lower-discharging type cigarette machine
The position of duct collar 6, in order to be burnt when preventing internal on fire to non-return piece 53 or internal high temperature makes its deformation, further,
Non-return piece 53 may be designed in metal structure.In addition, the rotational positioning of non-return piece 53 can use locked rotor current to detect, can also
Using two positions of either on or off positioning microswitch carry out position detection, with judge non-return piece 53 whether completely opening or
Close.
Embodiment two
The embodiment gives the specific embodiment scheme for carrying out judgement on fire on the basis of embodiment one.
Alternatively, whether main control unit judges inside lower-discharge type range hood on fire to wrap according to the temperature value collected
Include：
The first temperature value collected is compared with default temperature threshold on fire；
When the first temperature value is more than or equal to temperature threshold on fire, second temperature value is gathered after default first duration that is delayed,
And the second temperature value collected is compared with temperature threshold on fire；
When second temperature value is more than or equal to temperature threshold on fire, judge on fire inside lower-discharge type range hood；When the second temperature
When angle value is less than temperature threshold on fire, judge not on fire inside lower-discharge type range hood.
In embodiments of the present invention, temperature threshold on fire can be pre-set, with according to the temperature threshold on fire to oil pumping
Whether cigarette machine internal temperature height is judged, on fire inside smoke exhaust ventilator so as to judge.
Alternatively, the temperature threshold on fire can include：80 DEG C~90 DEG C.
In embodiments of the present invention, the temperature threshold on fire can be according to different application scenarios self-definings, for it
Concrete numerical value is not limited, and the preferable temperature of the temperature threshold on fire is 85 DEG C.
In embodiments of the present invention, as shown in figure 5, after lower-discharge type range hood brings into operation, main control unit 1 can be real-time
The temperature value in lower-discharge type range hood that collection thermocouple sensor 2 detects；And it is being more than temperature on fire as temperature detection value T
Spend threshold value Tf（Such as 85 DEG C）When, the setting detection delay t of main control unit 1, i.e., the first above-mentioned duration, it is therefore intended that prevent due to portion
The erroneous judgement for dividing flare to suck without causing burning, it is delayed after the first duration, if internal detection temperature is still more than Tf, sentences
It is on fire to determine lower-discharge type range hood inside, then system is automatically into fire extinguishing control program.
Alternatively, the first duration can include：3 seconds~5 seconds.
In embodiments of the present invention, first duration can be specific for its according to different application scenarios self-definings
Numerical value is not limited, first duration it is preferred when a length of 3 seconds.
Alternatively, main control unit 1, it is additionally operable on lower-discharge type range hood after electricity, whether detection blower fan 3 is in operation shape
State, when detection blowing machine 3 is not in running status, judge not on fire inside lower-discharge type range hood；At detection blowing machine 3
When running status, into according to the temperature value that collects judge inside lower-discharge type range hood whether flow on fire.
In embodiments of the present invention, on lower-discharge type range hood after electricity, it can first determine whether blower fan enters operation shape
State, if blower fan off-duty, smoke deflector 4 and air outlet check-valves 5 are closed, and outside flare cannot be introduced into lower-discharging type
, then also will not be on fire inside smoke exhaust ventilator in smoke exhaust ventilator inner chamber；If blower fan is in running status, smoke deflector 4 and air-out
Mouth check-valves 5 is in open mode, and outside flare may can not be sucked in smoke exhaust ventilator inner chamber by blower fan, then inside smoke exhaust ventilator
May be on fire；Therefore, main control unit 1 is now needed to gather the temperature value that thermocouple sensor detects in real time, should with basis
Temperature value further carries out judgement on fire.The embodiment scheme can further be increased by the detection to fan operation state
The accuracy of detection on fire.
Embodiment three
The embodiment given on the basis of embodiment two judge smoke exhaust ventilator inside it is on fire after fire extinguishing Solution Embodiments.
Alternatively, main control unit 1 starts fire extinguishing scheme when judging on fire inside lower-discharge type range hood and can included：
Control blower fan 3 out of service, and control smoke deflector 4 and air outlet check-valves 5 to close；
It is out of service in blower fan 3, after smoke deflector 4 and the closing of air outlet check-valves 5, the 3rd temperature value is gathered, and it is default in delay
The second duration after gather the 4th temperature value, the first difference of the 3rd temperature value and the 4th temperature value is calculated, when the first difference is big
When default first temperature change threshold value, determine that the intensity of a fire is controlled inside lower-discharge type range hood.
In embodiments of the present invention, as shown in fig. 6, after smoke exhaust ventilator entrance fire extinguishing control program, main control unit 1 closes wind
Machine 3 is run, and simultaneously closes off smoke deflector 4 and air outlet check-valves 5, it is therefore intended that the oxygen inside isolation smoke exhaust ventilator with outside atmosphere
Air-flow leads to so that flare quickly extinguishes after lacking oxygen.The temperature that collection thermocouple sensor 2 detects in real time simultaneously of main control unit 1
Angle value, an initial temperature value To can be detected first（The 3rd i.e. above-mentioned temperature value）, be delayed the second duration（Such as 5 seconds）Afterwards again
Secondary detection current temperature value T1（The 4th i.e. above-mentioned temperature value）, the judgement temperature change value of main control unit 1（I.e. above-mentioned first is poor
Value）Whether △ T1=T0- T1 are more than default first temperature change threshold value Tg（Generally preferably Tg temperature values are 15 DEG C）, due to
The detection temperature of thermocouple sensor 2 quickly reduces after flare extinguishes, and therefore, may determine that thermocouple passes by first difference
The detection temperature of sensor 2 whether rapid decrease, if the detection temperature rapid decrease of thermocouple sensor 2, judge lower-discharging type oil pumping
The intensity of a fire is controlled inside cigarette machine；If the non-rapid decrease of the detection temperature of thermocouple sensor 2, judges lower-discharge type range hood
The internal intensity of a fire is not controlled yet；Further fire suppression measures need to be taken, and are alarmed.
In embodiments of the present invention, when the first difference is more than default first temperature change threshold value, judge that thermocouple passes
The detection temperature rapid decrease of sensor 2, when the first difference is less than or equal to default first temperature change threshold value, judge thermocouple
The non-rapid decrease of the detection temperature of sensor 2.
Alternatively, the second duration can include：3 seconds~7 seconds.
In embodiments of the present invention, second duration can be specific for its according to different application scenarios self-definings
Numerical value is not limited, second duration it is preferred when a length of 3 seconds.
Alternatively, the first temperature change threshold value can include：10 DEG C~20 DEG C.
In embodiments of the present invention, the first temperature change threshold value can be right according to different application scenarios self-definings
It is not limited in its concrete numerical value, the preferable temperature of the first temperature change threshold value is 15 DEG C.
Alternatively, main control unit 1 is additionally operable to：
The 4th temperature value is being gathered, and the 5th temperature value, the 5th temperature that will be collected are gathered after default 3rd duration that is delayed
Value is compared with the 4th temperature value；When the 5th temperature value is less than or equal to four temperature values, judge in lower-discharge type range hood
Portion is on fire to have extinguished.
In embodiments of the present invention, it after the 4th temperature value is gathered, can further extend the 3rd duration, and extend the
Current temperature value T2 is gathered after three durations again（The 5th i.e. above-mentioned temperature value）If current temperature value T2≤T1, can
Extinguished with judging that smoke exhaust ventilator inside is on fire, and machine can protect control program automatically into smoke exhaust ventilator.
Alternatively, the 3rd duration can include：3 seconds~5 seconds.
In embodiments of the present invention, the 3rd duration can be specific for its according to different application scenarios self-definings
Numerical value is not limited, the 3rd duration it is preferred when a length of 3 seconds.
Example IV
The embodiment given on the basis of embodiment three inside the judgement it is on fire extinguished after smoke exhaust ventilator protection side
Case embodiment.
In embodiments of the present invention, as shown in fig. 7, the purpose of smoke exhaust ventilator defence program is to operate band by blower fan 3
Dynamic airflow circulating so that high temperature is quickly obtained cooling caused by fire inside smoke exhaust ventilator, avoids motor, circuit sheet and spray
Coating etc. damages in high temperature environments to come off, the stage major control is opened including smoke deflector 4, air outlet check-valves 5 open with
And blower fan 3 starts；When main control unit 1 detects that the temperature detection value of thermocouple sensor 2 recovers normal temperature, smoke exhaust ventilator protection
Program is closed automatically, and anti-ignition control routine is completed, and smoke exhaust ventilator protection scheme is described in detail below.
Alternatively, main control unit 1 judge lower-discharge type range hood inside it is on fire extinguished when start smoke exhaust ventilator protect
Shield scheme includes：
Control blower fan 3 brings into operation, and controls smoke deflector 4 and air outlet check-valves 5 to open；
Brought into operation in blower fan 3, after smoke deflector 4 and the opening of air outlet check-valves 5, gather the 6th temperature value, and it is default in delay
The 4th duration after gather the 7th temperature value, the second difference of the 6th temperature value and the 7th temperature value is calculated, when the second difference is big
When default second temperature change threshold, determine that lower-discharge type range hood internal cooling is normal.
In embodiments of the present invention, after lower-discharge type range hood enters protection control program, main control unit 1 starts blower fan 3
Operation, while open smoke deflector 4 and air outlet check-valves 5, it is therefore intended that accelerate lower-discharge type range hood internal high temperature and outside
The convection current of air so that smoke exhaust ventilator internal temperature quickly reduces.Main control unit 1 gathers thermocouple sensor 2 and examined in real time simultaneously
The temperature value measured, an initial temperature value T3 can be detected first（The 6th i.e. above-mentioned temperature value）, be delayed the 4th duration（Such as
60 seconds）Detect current temperature value T4 again afterwards（The 7th i.e. above-mentioned temperature value）, the judgement temperature change value of main control unit 1（On i.e.
The second difference stated）Whether △ T2=T3-T4 are more than second temperature change threshold Tc（Generally preferably Tc temperature values are 10 DEG C）,
Cigarette machine inside cavity high temperature convection current is driven because blower fan 3 is run so that the detection temperature of thermocouple sensor 2 quickly reduces；Therefore,
By second difference may determine that the detection temperature of thermocouple sensor 2 whether rapid decrease, if thermocouple sensor 2 is examined
Testing temperature rapid decrease, then judge that lower-discharge type range hood internal cooling is normal；If the detection temperature of thermocouple sensor 2 is not fast
Speed declines or even risen, then shows that smoke exhaust ventilator internal temperature is less than outside atmosphere temperature, convection current is not smooth, then main control unit
1 judges that now situation that may be present is that common flue or kitchen are on fire, and system can carry out condition of a fire row with warning reminding user
Remove, and automatically into off-mode.
In embodiments of the present invention, when the second difference is more than default second temperature change threshold, judge that thermocouple passes
The detection temperature rapid decrease of sensor 2, when the second difference is less than or equal to default second temperature change threshold, judge thermocouple
The non-rapid decrease of the detection temperature of sensor 2.
Alternatively, the 4th duration includes：50 seconds~70 seconds.
In embodiments of the present invention, the 4th duration can be specific for its according to different application scenarios self-definings
Numerical value is not limited, the 4th duration it is preferred when a length of 60 seconds.
Alternatively, second temperature change threshold can include：7 DEG C~15 DEG C.
In embodiments of the present invention, the second temperature change threshold can be right according to different application scenarios self-definings
It is not limited in its concrete numerical value, the preferable temperature of the second temperature change threshold is 10 DEG C.
Alternatively, main control unit 1 is additionally operable to：
Determine that lower-discharge type range hood internal cooling normally gathers the 8th temperature value afterwards, by the 8th temperature value collected with presetting
Reliability temperature threshold compare；When the 8th temperature value is less than reliability temperature threshold, judge that lower-discharge type range hood is in peace
Total state is simultaneously shut down.
In embodiments of the present invention, can be further to oil pumping after it is determined that lower-discharge type range hood internal cooling is normal
Cigarette machine internal temperature is detected, for example, the 8th temperature value T5 of collection, by the 8th temperature value T5 collected and default safety
Temperature threshold compares.The general reliability temperature threshold is set all than relatively low, if the current temperature value inside smoke exhaust ventilator is small
In the reliability temperature threshold, then illustrate that current smoke exhaust ventilator internal temperature is very low, in safety inside smoke exhaust ventilator
State.
Alternatively, the reliability temperature threshold can include：30 DEG C~40 DEG C.
In embodiments of the present invention, the reliability temperature threshold can be according to different application scenarios self-definings, for it
Concrete numerical value is not limited, and the preferable temperature of the reliability temperature threshold is 40 DEG C.
Alternatively, main control unit 1 judge lower-discharge type range hood inside it is on fire extinguished when start smoke exhaust ventilator protect
Shield scheme can also include：
When the second difference is less than or equal to second temperature change threshold, determine that common flue blocks or kitchen is on fire, and send
Alarm；And
When the 8th temperature value is more than or equal to reliability temperature threshold, the 9th temperature value is gathered after the duration of blower fan continuous service the 5th
T6, the 9th temperature value T6 collected is compared with reliability temperature threshold；When the 9th temperature value T6 is less than reliability temperature threshold
When, judge that lower-discharge type range hood is in a safe condition and shuts down；When the 9th temperature value T6 is more than or equal to reliability temperature threshold
When, judge lower-discharge type range hood failure, and alarm.
Alternatively, the 5th duration includes：5~20 minutes.
In embodiments of the present invention, the 5th duration can be specific for its according to different application scenarios self-definings
Numerical value is not limited, the 5th duration it is preferred when a length of 10 minutes.
In embodiments of the present invention, if current smoke exhaust ventilator internal temperature is more than or equal to 40 DEG C, main control unit 1 can
Temperature sampling is carried out again after being run 10 minutes with delay, it is same automatic if now smoke exhaust ventilator internal temperature is less than 40 DEG C
Into off-mode, otherwise shut down after warning reminding user exception.
The beneficial effect of the embodiment of the present invention includes：
1st, the lower-discharge type range hood of the embodiment of the present invention includes：The main control unit and thermocouple sensor of interconnection and master
Control unit connected blower fan, smoke deflector and air outlet check-valves；Thermocouple sensor, for detecting lower-discharge type range hood in real time
Interior temperature value；Main control unit, for collecting temperature value, judged according to the temperature value collected be inside lower-discharge type range hood
It is no on fire, and start fire extinguishing scheme when judging on fire inside lower-discharge type range hood, judging inside lower-discharge type range hood
It is on fire to start smoke exhaust ventilator protection scheme when having extinguished.By scheme of the embodiment of the present invention, smoke pumping can be detected in time
It is whether on fire inside machine, and smoke exhaust ventilator internal temperature is quickly reduced, avoid that motor, wiring board and sprayed coating are caused to damage.
2nd, the main control unit of the embodiment of the present invention according to the temperature value collected judge inside lower-discharge type range hood whether
It is on fire including：The first temperature value collected is compared with default temperature threshold on fire；When the first temperature value is more than or waits
When temperature threshold on fire, gather second temperature value after default first duration of being delayed, and by the second temperature value collected with
Temperature threshold on fire compares；When second temperature value is more than or equal to temperature threshold on fire, judge in lower-discharge type range hood
Portion is on fire；When second temperature value is less than temperature threshold on fire, judge not on fire inside lower-discharge type range hood.The present invention is implemented
Whether example scheme can be risen by the way that lower-discharge type range hood internal temperature is detected and compared in real time to smoke exhaust ventilator inside
Fire carries out accurate judgement, and prevents the erroneous judgement sucked due to part flare without causing burning, is lampblack absorber interior fittings
Security protection is laid a good foundation.
3rd, the main control unit of the embodiment of the present invention is additionally operable on lower-discharge type range hood after electricity, and whether detection blower fan is in
Running status, when detection blowing machine is not in running status, judge not on fire inside lower-discharge type range hood；When detection air-out
When machine is in running status, into according to the temperature value that collects judge inside lower-discharge type range hood whether flow on fire.
Scheme of the embodiment of the present invention can further increase the accuracy of detection on fire by the detection to fan operation state.
4th, the main control unit of the embodiment of the present invention starts fire extinguishing scheme bag when judging on fire inside lower-discharge type range hood
Include：Control blower fan out of service, and control smoke deflector and air outlet closure of check ring；It is out of service in blower fan, smoke deflector and go out
After the closure of check ring of air port, the 3rd temperature value is gathered, and the 4th temperature value is gathered after default second duration of being delayed, calculates the
First difference of three temperature values and the 4th temperature value, when the first difference is more than default first temperature change threshold value, it is determined that under
The intensity of a fire is controlled inside row's formula smoke exhaust ventilator.Scheme of the embodiment of the present invention is closed smoke deflector and gone out by stopping fan operation
Air port check-valves, and then the oxygen completely cut off inside smoke exhaust ventilator with outside atmosphere circulates so that flare quickly puts out after lacking oxygen
Go out, play the effect structure of cigarette machine fire extinguishing；And further determine whether the intensity of a fire is controlled by temperature drop rate, it ensure that
Extinguishing effect.
5th, the main control unit of the embodiment of the present invention is additionally operable to：The 4th temperature value is being gathered, and default 3rd duration that is delayed
The 5th temperature value is gathered afterwards, and the 5th temperature value collected is compared with the 4th temperature value；When the 5th temperature value is less than or waits
When four temperature values, on fire inside lower-discharge type range hood extinguished is judged.It is further ensured that by the embodiment scheme
Extinguishing effect, it is ensured that on fire to extinguish completely.
6th, the main control unit of the embodiment of the present invention judge lower-discharge type range hood inside it is on fire extinguished when start take out
Lampblack absorber protection scheme includes：Control blower fan brings into operation, and controls smoke deflector and air outlet check-valves to open；Start in blower fan
Operation, after smoke deflector and air outlet check-valves are opened, the 6th temperature value is gathered, and gather after default 4th duration that is delayed the
Seven temperature values, the second difference of the 6th temperature value and the 7th temperature value is calculated, when the second difference becomes more than default second temperature
When changing threshold value, determine that lower-discharge type range hood internal cooling is normal.The embodiment scheme is again turned on leading cigarette after extinguishing on fire
Plate and air outlet non-return piece, start motor air-exhausting function, can quickly reduce cigarette machine internal temperature, avoid to motor, wiring board
Cause to damage with sprayed coating.
Although disclosed herein embodiment as above, described content be only readily appreciate the present invention and use
Embodiment, it is not limited to the present invention.Technical staff in any art of the present invention, taken off not departing from the present invention
On the premise of the spirit and scope of dew, any modification and change, but the present invention can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of lower-discharge type range hood, it is characterised in that the lower-discharge type range hood includes：The main control unit of interconnection
Blower fan, smoke deflector and the air outlet check-valves being connected with thermocouple sensor, with the main control unit；
The thermocouple sensor, for detecting the temperature value in the lower-discharge type range hood in real time；
The main control unit, for gathering the temperature value, judge that the lower-discharging type is pumped according to the temperature value collected
It is whether on fire inside cigarette machine, and start fire extinguishing scheme when judging on fire inside the lower-discharge type range hood, described in judgement
It is on fire inside lower-discharge type range hood to start smoke exhaust ventilator protection scheme when having extinguished.
2. lower-discharge type range hood according to claim 1, it is characterised in that the main control unit is according to the institute collected
State temperature value judge inside the lower-discharge type range hood whether it is on fire including：
The first temperature value collected is compared with default temperature threshold on fire；
When first temperature value is more than or equal to the temperature threshold on fire, second is gathered after default first duration that is delayed
Temperature value, and the second temperature value collected is compared with the temperature threshold on fire；
When the second temperature value is more than or equal to the temperature threshold on fire, judge to rise inside the lower-discharge type range hood
Fire；When the second temperature value is less than the temperature threshold on fire, judge not on fire inside the lower-discharge type range hood.
3. lower-discharge type range hood according to claim 2, it is characterised in that
The main control unit, it is additionally operable on the lower-discharge type range hood after electricity, whether detects the blower fan in operation shape
State, when detecting that the blower fan is not in running status, judge not on fire inside the lower-discharge type range hood；When detecting
When the blower fan is in running status, it is inside the lower-discharge type range hood into being judged according to the temperature value that collects
No flow on fire.
4. lower-discharge type range hood according to claim 1, it is characterised in that the main control unit is judging the lower row
Starting fire extinguishing scheme when on fire inside formula smoke exhaust ventilator includes：
Control the blower fan out of service, and control the smoke deflector and the air outlet closure of check ring；
It is out of service in the blower fan, after the smoke deflector and the air outlet closure of check ring, the 3rd temperature value of collection, and
It is delayed after default second duration and gathers the 4th temperature value, calculate the 3rd temperature value with the 4th temperature value first is poor
Value, when first difference is more than default first temperature change threshold value, determine the intensity of a fire inside the lower-discharge type range hood
Controlled.
5. lower-discharge type range hood according to claim 4, it is characterised in that the main control unit is additionally operable to：
The 4th temperature value is being gathered, and the 5th temperature value is gathered after default 3rd duration that is delayed, described in collecting
5th temperature value is compared with the 4th temperature value；When the 5th temperature value is less than or equal to four temperature value,
Judge on fire inside the lower-discharge type range hood extinguished.
6. lower-discharge type range hood according to claim 1, it is characterised in that the main control unit is judging the lower row
It is on fire inside formula smoke exhaust ventilator to start smoke exhaust ventilator protection scheme when having extinguished and include：
Control the blower fan to bring into operation, and control the smoke deflector and the air outlet check-valves to open；
Brought into operation in the blower fan, after the smoke deflector and air outlet check-valves opening, the 6th temperature value of collection, and
It is delayed after default 4th duration and gathers the 7th temperature value, calculate the 6th temperature value with the 7th temperature value second is poor
Value, when second difference is more than default second temperature change threshold, determines the lower-discharge type range hood internal cooling
Normally.
7. lower-discharge type range hood according to claim 6, it is characterised in that the main control unit is additionally operable to：
Determine that the lower-discharge type range hood internal cooling normally gathers the 8th temperature value, the 8th temperature that will be collected afterwards
Value is compared with default reliability temperature threshold；When the 8th temperature value is less than the reliability temperature threshold, described in judgement
Lower-discharge type range hood is in a safe condition and shuts down.
8. lower-discharge type range hood according to claim 7, it is characterised in that the main control unit is judging the lower row
It is on fire inside formula smoke exhaust ventilator to start smoke exhaust ventilator protection scheme when having extinguished and also include：
When second difference is less than or equal to the second temperature change threshold, determine that common flue is blocked or kitchen is risen
Fire, and send alarm；And
When the 8th temperature value is more than or equal to the reliability temperature threshold, is gathered after the duration of blower fan continuous service the 5th
Nine temperature values, the 9th temperature value collected is compared with the reliability temperature threshold；When the 9th temperature value is small
When the reliability temperature threshold, judge that the lower-discharge type range hood is in a safe condition and shuts down；When the 9th temperature
When value is more than or equal to the reliability temperature threshold, the lower-discharge type range hood failure, and alarm are judged.
9. according to the lower-discharge type range hood described in claim 2-8 any one, it is characterised in that
The temperature threshold on fire includes：80 DEG C~90 DEG C；
First duration includes：3 seconds~5 seconds；
Second duration includes：3 seconds~7 seconds；
The first temperature change threshold value includes：10 DEG C~20 DEG C；
3rd duration includes：3 seconds~5 seconds；
4th duration includes：50 seconds~70 seconds；
The second temperature change threshold includes：7 DEG C~15 DEG C；
5th duration includes：5~20 minutes；
The reliability temperature threshold includes：30 DEG C~40 DEG C.
10. according to the lower-discharge type range hood described in claim 1-8 any one, it is characterised in that
The thermocouple sensor is arranged in the smoke collecting chamber side wall of the lower-discharge type range hood；
The smoke deflector is installed on the air inlet of the exhaust fume collecting hood；
The air outlet check-valves is installed at the discharge pipe interface position of the lower-discharge type range hood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710864392.XA CN107726394A (en) | 2017-09-22 | 2017-09-22 | A kind of lower-discharge type range hood |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710864392.XA CN107726394A (en) | 2017-09-22 | 2017-09-22 | A kind of lower-discharge type range hood |
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| CN107726394A true CN107726394A (en) | 2018-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710864392.XA Pending CN107726394A (en) | 2017-09-22 | 2017-09-22 | A kind of lower-discharge type range hood |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114704864A (en) * | 2022-03-30 | 2022-07-05 | 杭州老板电器股份有限公司 | Flameout protection method and device, oil fume suction device and readable storage medium |
| CN115342390A (en) * | 2022-08-17 | 2022-11-15 | 杭州老板电器股份有限公司 | Firewall control method and system of integrated cooker |
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| CN114704864A (en) * | 2022-03-30 | 2022-07-05 | 杭州老板电器股份有限公司 | Flameout protection method and device, oil fume suction device and readable storage medium |
| CN115342390A (en) * | 2022-08-17 | 2022-11-15 | 杭州老板电器股份有限公司 | Firewall control method and system of integrated cooker |
| CN115342390B (en) * | 2022-08-17 | 2024-08-16 | 杭州老板电器股份有限公司 | Firewall control method and system of integrated kitchen range |
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