CN207648895U - A kind of range hood - Google Patents
A kind of range hood Download PDFInfo
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- CN207648895U CN207648895U CN201721696260.2U CN201721696260U CN207648895U CN 207648895 U CN207648895 U CN 207648895U CN 201721696260 U CN201721696260 U CN 201721696260U CN 207648895 U CN207648895 U CN 207648895U
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Abstract
The utility model provides a kind of range hood, including the check-valves being arranged at air outlet, check-valves includes two valve discs being rotatably opened and closed and the positive conductive plate being arranged on the apparent surface of two valve discs and negative conductive plate, and positive conductive plate and the negative conductive plate form type variable capacitance；Range hood further includes non-return valve detection device, and the opening and closing of check-valves can be judged according to the variation of the capacitance of type variable capacitance.The utility model provides a kind of range hood with check-valves intelligent detecting function based on capacitive sensing technology, it may be used on machine for kitchen use field, by installing conductive plate on two valve discs of check-valves, constitute a kind of type variable capacitive means, by non-return valve detection device can real-time judge check-valves normal work when whether normally opened or closed, and by being optimized to the material, shape of conductive plate, assembling and mounting means on valve disc, fully ensure that systematic survey has high-precision and high reliability.
Description
Technical field
The utility model is related to machine for kitchen use field, more particularly to a kind of range hood.
Background technology
Currently, the air outlet of culinary range hood is generally all provided with the check-valves that can turn off or on air outlet.
When range hood is vented, check-valves opens air outlet, and oil smoke is discharged into common flue；When range hood does not work,
Check-valves closes air outlet, prevents the oil smoke in common flue from pouring in down a chimney, and therefore, the normal keying of check-valves has important meaning
Justice.
Utility model content
The structure of check-valves based on above-mentioned range hood, the utility model provide a kind of based on capacitive sensing technology
The range hood with check-valves intelligent detecting function, pass through two valve disc conductive plates installed above in check-valves, shape
At a kind of type variable capacitive means, and the non-return valve detection device with intelligent detecting function is devised, is detected by check-valves
Device can real-time judge range hood check-valves in the case of normal work whether normally open or normal switching-off,
So that the performance of range hood is more preferably.
In order to reach the purpose of this utility model, the technical solution that the utility model is taken is as follows：
A kind of range hood provided by the utility model, including the check-valves that is arranged at air outlet, the check-valves packet
Two valve discs being rotatably opened and closed and the positive conductive plate being arranged on the apparent surface of two valve discs and negative conductive plate are included,
The positive conductive plate and the negative conductive plate form type variable capacitance；
The range hood further includes non-return valve detection device, and the non-return valve detection device can be according to type variable electricity
The variation of the capacitance of appearance judges the opening and closing of the check-valves.
Range hood provided by the utility model, check-valves are mounted at air outlet, are provided with and are rotatably opened and closed
The opening and closing of two valve discs can be achieved in two valve discs, the rotation of two valve discs, and then controls the opening and closing of check-valves.The opposite table of two valve discs
It is respectively equipped with positive conductive plate and negative conductive plate on face, type variable capacitance is formed between the positive and negative conductive plate of opposite installation.
On check-valves when two valve disc rotary opening closings, positive and negative conductive plate can be driven to rotate synchronously, cause positive conductive plate and
Relative effective area variation between negative conductive plate, and then cause the capacitance of the type variable capacitance of positive and negative conductive plate composition
Variation；Non-return valve detection device exports corresponding signal according to different capacitances, to judge check-valves in range hood
In the case of normal work whether normally open or normal switching-off, to realize the intelligent measurement of check-valves state.
Specifically, the theoretical calculation formula of the capacitance of capacitance：C=ε S/ π kd, wherein Jie of the ε between positive and negative conductive plate
Electric constant, d are the relative distance of positive and negative conductive plate, and S is the area of positive and negative conductive plate.
According to above-mentioned formula it is found that when the timing of other parameters one, the area of the capacitance of capacitance and positive and negative conductive plate at
Direct ratio.Herein, the area of positive and negative conductive plate refers to the opposite effective area of the two.Due to symmetrical on two valve discs of check-valves
The presence for positive and negative two conductive plate being arranged, it is completely opposite between two valve discs when check-valves is opened completely, i.e. on two valve discs
Completely opposite between positive and negative conductive plate, effective area opposite between the positive and negative conductive plate of capacitance is maximum at this time, the electricity of capacitance
Capacitance is maximum；It is completely separable between two valve discs when check-valves completely closes, i.e. it is complete between positive and negative conductive plate on two valve discs
Complete to separate, effective area opposite between the positive and negative conductive plate of capacitance is zero at this time, and capacitance is minimum at this time.Check-valves detection dress
Setting can judge that check-valves is in opening or closed state according to the difference of capacitance.
In the present embodiment, the type variable capacitance of positive and negative conductive plate composition and the cooperation of non-return valve detection device can be used for detecting
The opening and closing of check-valves, therefore, type variable capacitance and non-return valve detection device constitute check-valves intelligent checking system.
Optionally, adjoining one end of two valve discs is provided with shaft, the positive conductive plate and the negative conduction
Pole plate is close to the shaft, and the positive outside wire of the positive conductive plate draws along the shaft from the side of the check-valves
Go out and connect with the non-return valve detection device, the negative outside wire of the negative conductive plate is along the shaft from the non-return
It draws and is connect with the non-return valve detection device in the side of valve.
In check-valves, shaft is respectively arranged in adjoining one end of two valve discs, two valve discs by shaft rotationally
It is fixed on the valve body of check-valves, and is rotatably opened and closed.Meanwhile positive conductive plate and negative conductive plate are also disposed at close turn
The position of axis, to draw the positive outside wire on positive conductive plate from the side of check-valves along shaft and to be examined with check-valves
Survey device capacitive interface connection, by the negative outside wire of negative conductive plate along shaft from the side of check-valves draw and with only
The capacitive interface connection for returning valve detection device makes positive conductive plate, negative conductive plate by positive outside wire and negative outside wire
Connection forms closed circuit circuit between non-return valve detection device.When power supply is connected, charge and discharge can be carried out to the type variable capacitance
Electricity, non-return valve detection device judge the open and-shut mode of check-valves according to the capacitance size of the variation, realize a kind of base in turn
In the check-valves detecting system of the intelligence of capacitive sensing technology.
It is influenced in addition, the installation site of positive and negative conductive plate has the detection sensitivity of non-return valve detection device, and incite somebody to action
Positive and negative conductive plate is arranged close to shaft, is conducive to the detection sensitivity for improving non-return valve detection device.
Optionally, the sum of area of apparent surface of the positive conductive plate and negative conductive plate SJBWith two valves
Relationship between the sum of the setting positive conductive plate of leaf and the area of apparent surface of the negative conductive plate S is：SJB≥
10%×S。
After tested, the sum of area of apparent surface of positive and negative conductive plate on two valve disc of check-valves SJBIt must control two
10% or more of the sum of area of apparent surface of valve disc S, i.e. SJB>=10% × S could meet the sensitive of non-return valve detection device
Degree requires.If the sum of the area of apparent surface of positive and negative conductive plate SJBToo small, positive and negative two is conductive when being rotated it will cause valve disc
The capacitance variation for the type variable capacitance that pole plate is constituted is smaller, may be not enough to accurately be detected by non-return valve detection device,
The sensitivity requirement of non-return valve detection device is not achieved, and then cannot accurately know the opening and closing situation of check-valves.
Optionally, the positive conductive plate is rectangular-shaped or semicircle shape or semi-oval；
Alternatively, the negative conductive plate is rectangular-shaped or semicircle shape or semi-oval.
The shape of positive and negative conductive plate has influence to the detection sensitivity of non-return valve detection device, is detected according to check-valves
The needs of the detection sensitivity of device, positive and negative conductive plate may be designed as rectangular-shaped or semicircle shape or ellipticity, further, positive and negative
It is identical that conductive plate may be configured as shape size, symmetrical and relatively on two valve disc of check-valves.
When positive and negative conductive plate is designed as rectangle, this design is convenient for cutting installation, and corner warps in order to prevent,
The angle of rectangle can be designed to fillet；When positive and negative conductive plate is designed as arc-shaped, positive and negative conductive electrode can be effectively prevented
The corner of plate warps so that the capacitance of composition is reliable and stable, such as can positive and negative conductive plate be designed to semi-oval, can also
Positive and negative conductive plate is designed to semicircle shape；Certainly, it can also be designed to other arbitrary shapes for electrode plate, and details are not described herein.
Optionally, the positive conductive plate is copper coin, aluminium sheet, iron plate or aluminium foil；
Alternatively, the negative conductive plate is copper coin, aluminium sheet, iron plate or aluminium foil.
The characteristic requirements of positive and negative conductive plate above valve disc are met the requirements as long as meeting conductive characteristic, right
It is not specially required in specific material, the positive and negative conductive plate in the present embodiment can be designed as copper coin, aluminium sheet, iron plate or aluminium
Foil.
When being fixed on above valve disc as positive and negative conductive plate using copper material pole plate, copper conducts electricity very well so that
The high sensitivity of non-return valve detection device, but copper is expensive.
When being fixed on above valve disc as positive and negative conductive plate using aluminium material pole plate, the electric conductivity of aluminium is preferable, makes
The sensitivity for obtaining non-return valve detection device is higher, and the moderate cost of aluminium.
When being fixed on above valve disc as positive and negative conductive plate using iron material matter pole plate, the electric conductivity of iron is moderate so that
The sensitivity of non-return valve detection device is moderate, and the price of iron is relatively inexpensive.
When being pasted onto above valve disc as positive and negative conductive plate using aluminium-foil paper, the electric conductivity of aluminium foil is general so that only
The sensitivity for returning valve detection device is general, and the price of aluminium foil is very cheap, but not easy to install, is easy breakage.
Optionally, the positive conductive plate and the negative conductive plate distinguish the corresponding valve disc by gluing or
It connects and fixes；
Alternatively, the positive conductive plate and the negative conductive plate are coated on the conductive layer on two valve discs；
Alternatively, two valve discs are made of metal material, and two valve discs be used separately as the positive conductive plate and
The negative conductive plate.
In the present embodiment, can be used by positive conductive plate and negative conductive plate distinguish corresponding valve disc by gluing or
The mode of clamping is fixed, i.e., is directly fixed on above valve disc conductive metal polar plate by way of viscose glue, then leads to
Positive and negative anodes lead-out wire is crossed to extract along shaft；The mode of viscose glue can be used seccotine etc. and be pasted, and can also pass through other
Glue, to enhance installation fixing of the positive and negative conductive plate on valve disc.
Alternatively, can also be respectively in two valve disc surface conductive coating as positive conductive plate and negative conductive plate, then
Positive and negative anodes lead-out wire is linked together with conductive layer by way of viscose glue, while conductive layer surface can also be carried out at spray painting
Reason, to prevent conductive layer from scratching, further increases the reliability of positive and negative conductive plate.
Alternatively, directly two valve discs can also be made of metal material, make two valve discs be used separately as positive conductive plate and
Negative conductive plate, can reduce the complexity of structure in this way, reduce processing and fabricating process, entire valve disc is as positive and negative conductive electrode
Plate is conducive to increase the relative effective area between positive and negative conductive plate, and then the detection for improving non-return valve detection device is sensitive
Degree.
Optionally, two valve discs are horizontally disposed, and can rotating opening under the action of the wind, turn under self gravitation effect
It is dynamic to close；
Alternatively, two valve discs pass through motor-driven rotation respectively.
Check-valves is arranged at air outlet, is horizontally disposed with thereon there are two two valve discs of the semicircle shape being rotatably opened and closed, is inhaled
After kitchen ventilator booting, wind turbine startup can form wind pressure at air outlet, make two valve discs along shaft rotating opening, after wind turbine is closed,
Valve disc is due to its own gravity Natural closure.
Alternatively, can also pass through the rotary opening closing of two valve discs on drive and control of electric machine check-valves.Phase is equally used on check-valves
Two valve discs of similar shape are simultaneously rotatably connected by shaft on valve body, and shaft passes through transmission mechanism with motor output shaft（Such as tooth
Wheel drive mechanism）It is connected, drives valve disc to act using motor, it is this to drive two valve disc of check-valves by increasing electric machine
Rotary opening closing is advantageously implemented the automation control of the opening and closing of check-valves.
Optionally, the non-return valve detection device includes oscillating circuit module and control unit module, the oscillating circuit
The rectangular wave of certain frequency can be exported, described control unit module is shaken according to according to the capacitance of the type variable capacitance
The frequency size for swinging the rectangular wave of circuit module output, judges the current state of the check-valves.
The range hood of the present embodiment, non-return valve detection device include oscillating circuit module and control unit module.Wherein,
Oscillating circuit module can export the rectangular wave of certain frequency according to the capacitance size of type variable capacitance in output end.When variable
When the capacitance of formula capacitance changes, correspondingly, the frequency size of the rectangular wave of oscillating circuit module output end output is caused to change；
Control unit module can judge the current shape of check-valves by the size of the frequency of the rectangular wave of detection oscillating circuit module output
State.
Optionally, the oscillating circuit module includes：When base concussion chip, first resistor, second resistance and anti-tampering electricity
Hold, base concussion chip has 8 pins when described；Wherein,
The first end of the base concussion pin 8 of chip, pin 4 and the first resistor is connected to power supply when described, and described the
The second end of one resistance is connected with the first end of the second resistance, the second end of the second resistance and the positive conductive plate
It is connected, the negative conductive plate ground connection, the pin 7 of base concussion chip is connected to the first resistor and second electricity when described
Between resistance, pin 2 and pin 6 are connected between the second resistance and the positive conductive plate, base concussion chip when described
Pin 1 is grounded, and pin 5 is connected and is grounded after the anti-tampering capacitance, and pin 3 is output end.
In above-mentioned oscillating circuit module, when the capacitance of type variable capacitance is constant, the output of oscillating circuit module is constant
The rectangular wave of frequency；When the capacitance variation of type variable capacitance, the frequency of the rectangular wave of oscillating circuit module output can be caused
Change.Specifically, when capacitance increases, the frequency of the rectangular wave of oscillating circuit module output reduces, when capacitance reduces,
The frequency of the rectangular wave of oscillating circuit module output increases；Control unit module judges that check-valves is worked as according to the frequency of rectangular wave
Preceding be in opens or closes state.
Optionally, the non-return valve detection device further includes alarm module, when exception is opened or closed to the check-valves
When, the alarm module automatic alarm.
When check-valves is opened or closes abnormal, alarm module can and alarm, notify user to repair in time.
The concrete operating principle of range hood provided by the utility model is as follows：
After range hood starts, the check-valves at air outlet is in the case where wind-force acts on or motor-driven rotation acts on, two valve discs
Rotatable opening and closing occurs.
When two valve disc rotating openings, two valve discs are parallel opposite, and correspondingly positive and negative conductive plate also remains parallel opposite,
The effective area of the apparent surface of positive and negative conductive plate is maximum at this time, i.e., the capacitance for the type variable capacitance that positive and negative conductive plate is constituted
Value reaches maximum, and oscillating circuit module is according to the capacitance size of type variable capacitance（Capacitance is maximum）, output end the output phase pair
Answer the rectangular wave of frequency（Frequency is minimum）, then control unit module sentenced according to the frequency size of oscillating circuit module output end
Break and check-valves and be currently at normally open state；
When two valve discs, which rotate, closes, the effective area of the apparent surface of positive and negative conductive plate is approximately zero, you can variant
The capacitance of capacitance is approximately zero, and the period of the rectangular wave of output end of oscillating circuit output can be considered infinitely small, and frequency can be considered
Infinity, line signals judge that check-valves is currently at completely closed state to control unit module accordingly；
During two valve disc rotating openings, the effective area of the apparent surface between positive and negative conductive plate increases, into
And the capacitance of type variable capacitance gradually increases, the frequency of the rectangular wave of oscillating circuit module output end output at this time gradually subtracts
It is small；Conversely, during two valve discs are rotated and closed, the effective area of the apparent surface between positive and negative conductive plate reduces, and shakes
The frequency for swinging the rectangular wave of circuit module output end output increases.Control unit module can according to the increase of the frequency of rectangular wave or
Reduce, judges that check-valves is currently at opening procedure or closing process, and according to the frequency size of rectangular wave, judge to stop
Return the current opening degree of valve.
The technical solution of the utility model compared with prior art, has the advantages that：
1, the utility model devises a kind of suction with check-valves intelligent detecting function based on capacitive sensing technology
Kitchen ventilator constitutes a kind of type variable capacitive means by two valve discs positive and negative conductive plate installed above in check-valves, and
According to the variation of capacitance, whether real-time judge check-valves has normally been opened in the case of normal work or normal pass
It closes；
2, the utility model is realized by the structure design to the positive and negative conductive plate above valve disc to check-valves
High-precision, high reliability detection；
3, the utility model is according to the structure of check-valves valve valve disc, by the positive and negative conductive plate above valve disc
Material, shape carry out analysis of experiments, choose the solution of high performance-price ratio, realize the accurate inspection of the position of check-valves valve disc
It surveys；
4, the utility model is optimized by assembling mode to the positive and negative conductive plate above valve disc and installation site
Design solves positive and negative conductive plate peace under the premise of fully ensuring that check-valves measuring system has high-precision and high reliability
The problem of assembling structure complexity realizes convenient installation of the positive and negative conductive plate on valve disc.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages can pass through
Specifically noted structure is realized and is obtained in specification, claims and attached drawing.
Description of the drawings
Attached drawing is used for providing further understanding technical solutions of the utility model, and a part for constitution instruction,
With for explaining the technical solution of the utility model, do not constituted to technical solutions of the utility model together with embodiments herein
Limitation.
Fig. 1 is the structural schematic diagram of the check-valves of the range hood according to the embodiments of the present invention；
Fig. 2 a and Fig. 2 b are the structural schematic diagram that check-valves is respectively at opening state and closed state shown in Fig. 1；
Fig. 3 is the structural schematic diagram in valve disc rotation process on check-valves shown in Fig. 1；
Fig. 4 a are the structural schematic diagram of the check-valves described in another embodiment according to the utility model；
Fig. 4 b are the structural schematic diagram of the check-valves described in another embodiment according to the utility model；
Fig. 5 is the structural schematic diagram of the check-valves described in another embodiment according to the utility model；
Fig. 6 is the structural schematic diagram of the check-valves described in another embodiment according to the utility model；
Fig. 7 is the side structure schematic view of check-valves shown in Fig. 6；
Fig. 8 is the structural schematic diagram of the check-valves described in another embodiment according to the utility model；
Fig. 9 is the schematic cross-sectional view of the portions A structure in Fig. 8；
Figure 10 is the schematic block diagram of the operation principle of the range hood according to the present embodiment；
Figure 11 is the principle schematic of oscillating circuit module；
Figure 12 is the output voltage of the voltage value Uc and oscillating circuit module in oscillating circuit module on type variable capacitance
The oscillogram that Uo is changed over time.
Wherein, the relationship in Fig. 1-Figure 12 between reference numeral and component names is：
1-8 pins, 9 check-valves, 10 valve discs, 11 positive conductive plates, 12 negative conductive plates, 13 positive outside wires, 14 cathode
Lead-out wire, 15 shafts, 16 excessive glue holes, 17 card slots, 18 positioning columns, 19 buckles.
Specific implementation mode
To make the purpose of this utility model, technical solution and advantage be more clearly understood, below in conjunction with attached drawing to this
The embodiment of utility model is described in detail.It should be noted that in the absence of conflict, embodiment in the application and
Feature in embodiment mutually can be combined arbitrarily.
As shown in Figure 1, a kind of range hood provided by the utility model, including the check-valves 9 that is arranged at air outlet, only
It returns on valve 9 and is provided with two valve discs 10 being rotatably opened and closed, the opening and closing of two valve discs 10 can be achieved in the rotation of two valve discs 10, and then realizes and stop
Return the opening and closing of valve 9.It is respectively equipped with positive conductive plate 11 and negative conductive electrode on the apparent surface of two valve discs 10 of check-valves 9
Plate 12, it is identical that positive and negative conductive plate 11 with 12 is set as shape size, symmetrical and relatively mounted on 9 liang of valve discs 10 of check-valves
On, two positive and negative conductive plates 11 and 12 being symmetrically installed form type variable capacitance structure.
Range hood further includes non-return valve detection device, and non-return valve detection device can be according to the capacitance of type variable capacitance
Variation judges the opening and closing of check-valves 9.
After range hood starts, on check-valves 9 when two 10 rotary opening closings of valve disc, positive and negative conductive plate 11 and 12 can be driven together
Step rotation, leads to the positive conductive plate 11 on the apparent surface of two valve discs 10 and the relative effective area between negative conductive plate 12
Variation, and then cause the capacitance variation for the type variable capacitance that the positive and negative conductive plate 11 and 12 on two valve discs 10 constitutes；Non-return
Whether valve detection device can determine whether out the check-valves 9 of range hood in the case of normal work according to different capacitances
Through normally opening or normal switching-off, to realize the real-time intelligent measurement of 9 state of check-valves.
Specifically, according to capacitance theoretical calculation formula：
C=εS/4πkd （Formula 1）
Wherein, dielectric constants of the ε between positive and negative conductive plate, d are the relative distance of positive and negative conductive plate, and S is positive and negative leads
The area of electrode plate.
According to above-mentioned formula it is found that when one timing of other parameters, the capacitance of type variable capacitance and positive and negative conductive plate 11
It is directly proportional with 12 area.Herein, the area of positive and negative conductive plate 11 and 12 refers to the opposite effective area of the two.Due to non-return
The presence of symmetrically arranged positive and negative two conductive plate 3 and 5 on two valve discs 10 of valve 9, when check-valves 9 is opened completely（Such as figure
Shown in 2a）, it is completely opposite between two valve discs 10, i.e. it is completely opposite between positive and negative conductive plate 11 and 12 on two valve discs 10, this
When type variable capacitance positive and negative conductive plate 11 and 12 between opposite effective area it is maximum, capacitance is maximum；When check-valves 9 is complete
When closing（As shown in Figure 2 b）, it is completely separable between two valve discs 10, i.e. between positive and negative conductive plate 11 and 12 on two valve discs 10
Completely separable, effective area opposite between the positive and negative conductive plate 11 and 12 of type variable capacitance is zero at this time, and capacitance is most at this time
It is small.Non-return valve detection device can judge that check-valves 9 is in opening or closed state according to the difference of capacitance.
Further, adjoining one end of two valve discs 10 is provided with shaft 15, and two valve discs 10 are fixed on by shaft 15
On check-valves 9, and rotary opening closing can be carried out with respect to shaft 15.Meanwhile positive conductive plate 11 and negative conductive plate 12 being also provided with
Close to the position of shaft 15, the positive outside wire 13 on positive conductive plate 11 is drawn along shaft 15 from the side of check-valves 9
Go out and connect with the capacitive interface of non-return valve detection device, by the negative outside wire 14 of negative conductive plate 12 along shaft 15 from only
The side for returning valve 9 is drawn and is connect with the type variable capacitive interface of non-return valve detection device, and positive outside wire 13 and cathode are passed through
Lead-out wire 14 makes positive conductive plate 11, negative connection between conductive plate 12 and non-return valve detection device form closed circuit circuit.
When power supply is connected, charge and discharge can be carried out to the type variable capacitance, non-return valve detection device according to the capacitance size of the variation into
And judge the open and-shut mode of check-valves 9, realize a kind of 9 intelligent checking system of check-valves based on capacitive sensing technology.
In conjunction with the motion process structural schematic diagram of capacitance sensing theory and check-valves 9（Fig. 3）It is found that moved in valve disc 10
In the process, under the conditions of the relative area S0 of positive and negative conductive plate 11 and 12 is remained unchanged, with two valve discs 10 and perpendicular bisector
Between angle（It is indicated below with β）Variation, the relative effective area S1 of positive and negative conductive plate 11 and 12 is represented by：
S1=S0*cosβ （Formula 2）
In the example depicted in fig. 3, positive and negative conductive plate 11 and 12 is rectangular slab, and S0 is the product of length L and width W,
Therefore S1=L*W*cos β.
Opening with check-valves 9 or closing, angle beta variation, the relative effective area of positive and negative conductive plate 11 and 12
S1 changes.Specifically, as shown in figure 3, when check-valves 9 is opened, the angle β of two valve discs 10 and perpendicular bisector is 0 °, positive and negative conduction
The relative effective area of pole plate 11 and 12 is maximum；When check-valves 9 is closed, the angle β of two valve discs 10 and perpendicular bisector is 90 °, just
The relative effective area of negative conductive plate 11 and 12 is minimum.
When the rotation of valve disc 10 drives positive and negative conductive plate 11 and 12 to rotate, non-return valve detection device can be according to capacitance
Size judges whether the check-valves 9 of range hood has normally been opened or normal switching-off in the case of normal work.
Specifically, as shown in figure 3, in 9 closing process of check-valves, β increases, and leads to the positive and negative conduction on two valve discs 10
The effective area of apparent surface between pole plate 11 and 12 becomes smaller, the capacitance for the type variable capacitance that positive and negative conductive plate 3 forms
Reduce, when check-valves 9 completely closes, the capacitance of type variable capacitance is minimum.During check-valves 9 is opened, β reduces,
The effective area of the apparent surface between the positive and negative conductive plate 11 and 12 on two valve discs 10 is caused to become larger, the electricity of type variable capacitance
Capacitance becomes larger, and when check-valves 9 is opened completely, the capacitance of type variable capacitance is maximum.
After tested, the sum of area of apparent surface of positive and negative conductive plate 11 and 12 on 9 liang of valve discs 10 of check-valves SJBIt must
The apparent surface in two valve discs 10 must be controlled（Two apparent surfaces of positive and negative conductive plate 11 and 12 are installed）The sum of area S
10% or more, i.e. SJB>=10% × S could meet the sensitivity requirement of non-return valve detection device.Because if positive and negative conductive plate 11
With the sum of 12 area of apparent surface SJBWhen too small, when being rotated it will cause valve disc the capacitance variation of type variable capacitance compared with
It is small, it may be not enough to accurately be detected by non-return valve detection device, the sensitivity to which non-return valve detection device be not achieved is wanted
It asks, the sensitivity of systematic survey is made to cannot be guaranteed, and then cannot accurately know the opening and closing situation of check-valves 9.
Detection sensitivity of the shape of positive and negative conductive plate 11 and 12 on 9 valve disc 10 of check-valves to non-return valve detection device
With influence, according to the needs of the detection sensitivity of non-return valve detection device, positive and negative conductive plate 11 and 12 may be designed as rectangle
Shape or semicircle shape or ellipticity, further, it is identical that positive and negative conductive plate 11 with 12 may be configured as shape size, symmetrical and opposite
Ground is mounted on 9 liang of valve discs 10 of check-valves.
When positive and negative conductive plate 11 and 12 is designed as rectangle, as shown in Figure 1, this design is installed convenient for cutting, and it is
Warping for corner is prevented, the angle of rectangle can be designed to fillet, as shown in fig. 4 a；When positive and negative conductive plate 11 and 12 is designed as
When arc-shaped, positive and negative conductive plate 11 can be effectively prevented and 12 corners warp so that installation is relatively reliable, optionally, can
Positive and negative conductive plate 11 and 12 is designed to semi-oval, as shown in Figure 4 b, positive and negative conductive plate 11 and 12 can also be set
Count into semicircle shape；Certainly, it can also be designed to other arbitrary shapes for positive and negative conductive plate 11 and 12, and details are not described herein.
The characteristic requirements of positive and negative conductive plate 11 and 12 above valve disc 1 are met as long as meeting conductive characteristic
It is required that not specially required for specific material, the positive and negative conductive plate 11 and 12 in the present embodiment can be designed as copper coin, aluminium
Plate, iron plate or aluminium foil.
Optionally, when being fixed on above valve disc 10 as positive and negative conductive plate 11 and 12 using copper material pole plate, copper
It conducts electricity very well, the high sensitivity of non-return valve detection device, but copper is expensive.
Optionally, when being fixed on above valve disc 10 as positive and negative conductive plate 11 and 12 using aluminium material pole plate, aluminium
Electric conductivity is preferable, and the sensitivity of non-return valve detection device is higher, and the moderate cost of aluminium.
Optionally, when being fixed on above valve disc 10 as positive and negative conductive plate 11 and 12 using iron material matter pole plate, iron
Electric conductivity is moderate, and the sensitivity of non-return valve detection device is moderate, and the price of iron is relatively inexpensive；Alternatively, can be by entire valve disc 10 all
Using iron material matter, valve disc 10 functions simultaneously as the effect of electrode.
Optionally, when being pasted onto above valve disc 10 as positive and negative conductive plate 11 and 12 using aluminium-foil paper, aluminium foil is led
Electrically general, the sensitivity of non-return valve detection device is general, and the price of aluminium foil is very cheap；But easy breakage not easy to install.
Certainly, the positive and negative conductive plate 11 and 12 in the utility model is also designed to other various materials, as long as
Meet the conductive characteristic of positive and negative conductive plate 11 and 12, details are not described herein.
In the present embodiment, optionally, it can be used and positive conductive plate 11 and negative conductive plate 12 are distinguished into corresponding valve
Leaf 10 is fixed by way of gluing, i.e., conductive metal polar plate is directly pasted and fixed on valve disc by way of viscose glue
Above 10, then extracted along shaft 15 by positive and negative anodes lead-out wire 13 and 14；The mode of viscose glue can be used seccotine etc. into
Row is pasted, can also be by other glue, to enhance the installation jail of positive conductive plate 11 and negative conductive plate 12 on valve disc 10
By property；As shown in figure 5, to improve the operability and fixing when gluing, opened up on positive and negative conductive plate 11 and 12 respectively
There is excessive glue hole 16（Part excessive glue hole 16 is only shown in Fig. 5）, to improve excessive glue uniformity, ensure that viscose glue is secured.
Optionally, positive conductive plate 11 and negative conductive plate 12 can also be distinguished to corresponding valve disc 10 by clamping
Mode is fixed.In an optional embodiment, as shown in Figure 6 and Figure 7, card slot 17 and positioning are provided on valve disc 10
Column 18.When installation, positive conductive plate 11 and negative conductive plate 12 are installed in card slot 17 respectively, and by positioning column 18 to just
The position of negative conductive plate 11 and 12 is limited, and positive and negative conductive plate 11 and 12 is made to be fastened on card slot and positioning column limit securely
In fixed location structure, prevent pole plate from loosening.In another optional embodiment, as shown in Figure 8 and Figure 9, on valve disc 10
It is provided with card slot 17 and buckle 19.When installation, positive conductive plate 11 and negative conductive plate 12 are installed in card slot 17 respectively, and
Position by buckling 19 pairs of positive and negative conductive plates 11 and 12 fixes, and positive and negative conductive plate 11 and 12 is made to block securely
It closes in card slot, prevents pole plate from loosening.
Alternatively it is also possible to respectively in two valve discs, 10 surface conductive coating as positive conductive plate 11 and negative conductive plate
12, then positive and negative anodes lead-out wire 4 and 6 is linked together with conductive layer by way of viscose glue, while can also be to conductive layer table
Face carries out spray painting processing, to prevent conductive layer from scratching, further increases the reliability of positive and negative conductive plate 11 and 12.
Alternatively it is also possible to directly be made of metal material two valve discs 10, two valve discs 10 is made to be used separately as positive conduction
Pole plate 11 and negative conductive plate 12 can reduce the complexity of structure in this way, reduce processing and fabricating process, and entire valve disc 10 is made
Be conducive to increase the relative effective area between positive and negative conductive plate 11 and 12 for positive and negative conductive plate, and then improve check-valves inspection
Survey the detection sensitivity of device.
Due to influence very little of the thickness for detection sensitivity of positive and negative conductive plate, can be ignored, therefore for
The thickness of positive and negative conductive plate does not require, difference that can be based on cost and processing technology, chooses the scheme of least cost.
Further, since check-valves 9 is arranged at air outlet, horizontally disposed thereon there are two the semicircles being rotatably opened and closed
Two valve discs 10 of shape, after range hood is switched on, wind turbine startup can form wind pressure at air outlet, make two valve discs 10 along shaft 15
Rotating opening, after wind turbine is closed, valve disc 10 is due to its own gravity Natural closure.Valve disc 10 can individually group install, can
To disassemble.
Optionally, the rotary opening closing of two valve discs 10 on drive and control of electric machine check-valves 9 can also be passed through.It is same on check-valves 9
Using same shape two valve discs 10 and be rotatably connected on valve body by shaft 15, shaft 15 and motor output shaft pass through biography
Motivation structure（Such as gear drive）It is connected, drives valve disc 10 to act using motor, it is this to be driven by increasing electric machine
9 liang of 10 rotary opening closings of valve disc of dynamic check-valves, are advantageously implemented the automation control of the opening and closing of check-valves 9.
Optionally, non-return valve detection device includes oscillating circuit module and control unit module.Oil suction in the present embodiment
Smoke machine is to detect check-valves by type variable capacitance, oscillating circuit module and the control unit module three parts on check-valves
Opening and closing, as shown in Figure 10.
Wherein, positive and negative conductive plate 11 and 12 constitutes type variable capacitance on 9 liang of valve discs 10 of check-valves, is rotated by valve disc 10
Change the relative effective area between positive and negative conductive plate 11 and 12, then changes the capacitance size of type variable capacitance.
Oscillating circuit module can export the rectangle of certain frequency according to the capacitance size of type variable capacitance in output end
Wave.When the capacitance of type variable capacitance C changes, correspondingly, cause the frequency of the rectangular wave of oscillating circuit module output end output
Rate size changes.
Control unit module can judge non-return by the size of the frequency f of the rectangular wave of detection oscillating circuit module output
The current state of valve 9.
In the specific example shown in Figure 11, base concussion chip, first resistor when oscillating circuit module includes（With RA tables
Show）, second resistance（It is indicated with RB）With anti-tampering capacitance（It is indicated with C1）, when base concussion chip have 8 pins.Wherein, when
The first end of the base concussion pin 8 of chip, pin 4 and first resistor RA is connected to power supply VCC, the second end of first resistor RA with
The first end of second resistance RB is connected, and the second end of second resistance RB is connected with the positive conductive plate 11 of type variable capacitance C, negative to lead
Electrode plate 12 be grounded, when base concussion chip pin 7 be connected between first resistor RA and second resistance RB, pin 2 and pin 6
Be connected between second resistance RB and the positive conductive plate 11 of type variable capacitance C, when base concussion chip pin 1 be grounded, pin 5
It connects and is grounded after anti-tampering capacitance C1, pin 3 is output end.
In conjunction with the schematic diagram of oscillating circuit module（Figure 11）It is found that RA, RB and C constitute RC charge-discharge circuit, internal ratio
Compared with device A1 reference voltages（2/3VCC）It is added in in-phase input end, internal comparator A2 reference voltages（1/3VCC）It is added in reversed input
End.Wherein RA, RB and C1 are outward element, and C is type variable capacitance（In corresponding the utility model by 9 liang of valve discs 10 of check-valves
On positive and negative conductive plate 11 and 12 form type variable capacitance）.
When power supply VCC is connected, the pin 3 of time-base oscillation chip exports high level, at the same power supply VCC by RA, RB to
Capacitance C chargings, when the voltage on capacitance C reaches the threshold voltage of time-base oscillation chip pin 6（2/3VCC）When, time-base oscillation core
The pin 7 of piece bleeds off the electricity in capacitance C, and the voltage that pin 3 exports at this time becomes low level by high level.When the electricity of capacitance C
Pressure drop is arrived（1/3VCC）When, pin 3 exports high level again, while power supply VCC charges through RA, RB to capacitance C again.In this way week and
It renews, forms oscillation rectangular wave output.During capacitance C charge and discharge, voltage Uc on capacitance C at any time t variation with
And the output end of time-base oscillation chip（Pin 3）The variation of the voltage Uout of output t at any time is specifically as shown in figure 12.
In conjunction with above-mentioned analysis, the schematic diagram of the oscillating circuit module of Figure 11 and Figure 12 it is found that cycle of oscillation T includes capacitance
Charging time T1 and capacitor discharge time T2, T=T1+T2：
The wherein charging time：
T1=（RA+RB）*C*ln2≈0.69*（RA+RB）*C （Formula 3）
Discharge time：
T2=RB*C*ln2≈0.69*RB*C （Formula 4）
Therefore, the cycle of oscillation of the rectangular wave of output is：
T=T1+T2=0.69* （RA+2RB）*C （Formula 5）
And frequency f=1/T（Formula 6）
In the present embodiment, the value of RA, RB and C1 are constant, and therefore, the capacitance variation of only type variable capacitance C can shadow
Ring the frequency f of the rectangular wave of oscillating circuit module output.When the capacitance variation of type variable capacitance C, oscillating circuit can be caused
The frequency f that module exports rectangular wave changes, and control unit module judges that check-valves 9 is currently at and beat according to the frequency f of rectangular wave
Open or close closed state.
By formula 1 to formula 6 it is found that the frequency f and angle β of the output of oscillating circuit module are proportional.That is,
With the reduction of angle β between two valve discs 10 and perpendicular bisector, the valve disc 10 of check-valves 9 in opened condition, positive and negative two conductions
The capacitance for the type variable capacitance C that pole plate 11 and 12 forms increases, but the pulse frequency f of oscillating circuit module output reduces.
Further, non-return valve detection device further includes alarm module, when check-valves 9 is opened or closes abnormal,
Alarm module automatic alarm, notifies user to repair in time, ensures non-return valve detection device job stability.
In conjunction with attached drawing Fig. 1-Figure 12, the concrete operating principle of range hood provided in this embodiment is as follows：
After range hood starts, the check-valves 9 at air outlet is in the case where wind-force acts on or motor-driven rotation acts on, two valve discs
10 occur rotatable opening and closing.
When two 10 rotating openings of valve disc, as shown in Figure 2 a, angle β is 0 degree approximate, and two valve discs 10 are parallel opposite, accordingly
The positive and negative conductive plate in ground 11 also remains parallel opposite, the significant surface of the apparent surface of positive and negative conductive plate 11 and 12 at this time with 12
Product is maximum, i.e., the capacitance for the type variable capacitance that positive and negative conductive plate 11 and 12 is constituted reaches maximum, oscillating circuit module according to
The capacitance size of type variable capacitance（Capacitance is maximum）, the rectangular wave of output end the output phase respective frequencies（Frequency is minimum）, after
And control unit module judges that check-valves 9 is currently at normal opening according to the frequency size of oscillating circuit module output end
State；
When two valve discs 10, which rotate, closes, as shown in Figure 2 b, angle β is approximate 90 degree, positive and negative conductive plate 11 and 12
The effective area of apparent surface is approximately zero, you can the capacitance of variant capacitance C is approximately zero, output end of oscillating circuit output
The period of rectangular wave can be considered infinitely small, and frequency can be considered infinitely great, and line signals judge non-return to control unit module accordingly
Valve 9 is currently at completely closed state；
During two 10 rotating openings of valve disc, i.e., β is gradually reduced, the opposite table between positive and negative conductive plate 11 and 12
The effective area in face increases, and then the capacitance of type variable capacitance increases, the rectangle of oscillating circuit module output end output at this time
The frequency of wave is gradually reduced；Conversely, during two valve discs 10 are rotated and closed, i.e., β gradually increases, 11 He of positive and negative conductive plate
The effective area of apparent surface between 12 reduces, and the capacitance of type variable capacitance reduces, the output of oscillating circuit module output end
The frequency of rectangular wave gradually increase.Control unit module can increaseing or decreasing according to the frequency of rectangular wave, judge non-return
Valve 9 is currently at opening procedure or closing process, and according to the frequency size of rectangular wave, judges that check-valves 9 is current and beats
Open degree.
When check-valves 9 is opened or closes abnormal, alarm module automatic alarm notifies user to repair in time.
The embodiment of the present invention has the following advantages：
1, type variable capacitance is formed by the way that positive and negative conductive plate is arranged on two valve discs of check-valves, and passes through design
A kind of check-valves intelligent measurement detecting system based on type variable capacitance, accurately detects and judges the current of check-valves in real time
State, solving the problems, such as check-valves control, closed loop, detection be not intelligent；
2, by one oscillating circuit module of design, make the variation of type variable capacitance that the frequency of output waveform be caused to change,
By the detection of the variation to output waveform frequency come the state of real-time judge check-valves, real-time is high with accuracy；
3, the positive and negative conductive plate being arranged on two valve discs of check-valves, as long as the material with conductive characteristic all may be used
To use, material cost can be greatly reduced；
4, on the basis of the state of detection check-valves in real time, further judge the opening of check-valves or whether different close
Often, the automatic alarm if there is exception is reminded user to carry out cleaning and is reported for repairment.
It should be noted that each technical characteristic of embodiment described above can be combined arbitrarily, to keep description simple
Clean, combination not all possible to each technical characteristic in above-described embodiment is all described, as long as however, these technologies are special
Contradiction is not present in the combination of sign, is all considered to be the range of this specification record.
Embodiment described above only expresses the several embodiments of the utility model, and description is more specific and detailed
Carefully, but the content only the utility model and the embodiment that uses for ease of understanding, it is not limited to the utility model.
Technical staff in any the utility model fields, in the premise for not departing from the spirit and scope disclosed by the utility model
Under, any modification and variation, but the scope of patent protection of the utility model can be carried out in the form and details of implementation, still
The appended claims that must be subject to is defined.
Claims (10)
1. a kind of range hood, including the check-valves that is arranged at air outlet, which is characterized in that
The check-valves includes two valve discs being rotatably opened and closed and the positive conduction that is arranged on the apparent surface of two valve discs
Pole plate and negative conductive plate, the positive conductive plate and the negative conductive plate form type variable capacitance；
The range hood further includes non-return valve detection device, and the non-return valve detection device can be according to the type variable capacitance
The variation of capacitance judges the opening and closing of the check-valves.
2. range hood according to claim 1, which is characterized in that
Adjoining one end of two valve discs is provided with shaft, the positive conductive plate and the negative conductive plate close to described
Shaft, and the positive outside wire of the positive conductive plate is drawn from the side of the check-valves along the shaft and is stopped with described
Valve detection device connection is returned, the negative outside wire of the negative conductive plate is drawn along the shaft from the side of the check-valves
And it is connect with the non-return valve detection device.
3. range hood according to claim 1, which is characterized in that
The sum of the area of apparent surface of the positive conductive plate and negative conductive plate SJBWith the setting institute of two valve discs
The relationship stated between the sum of the area of apparent surface of positive conductive plate and negative conductive plate S is：SJB≥10%×S。
4. range hood according to any one of claim 1-3, which is characterized in that
The positive conductive plate is rectangular-shaped or semicircle shape or semi-oval；
Alternatively, the negative conductive plate is rectangular-shaped or semicircle shape or semi-oval.
5. range hood according to any one of claim 1-3, which is characterized in that
The positive conductive plate is copper coin, aluminium sheet, iron plate or aluminium foil；
Alternatively, the negative conductive plate is copper coin, aluminium sheet, iron plate or aluminium foil.
6. range hood according to any one of claim 1-3, which is characterized in that
The corresponding valve disc by gluing or connects and fixes respectively for the positive conductive plate and the negative conductive plate；
Alternatively, the positive conductive plate and the negative conductive plate are coated on the conductive layer on two valve discs；
Alternatively, two valve discs are made of metal material, and two valve discs are used separately as the positive conductive plate and described
Negative conductive plate.
7. range hood according to any one of claim 1-3, which is characterized in that
Two valve discs are horizontally disposed, and can rotating opening under the action of the wind, rotate and close under self gravitation effect；
Alternatively, two valve discs pass through motor-driven rotation respectively.
8. range hood according to any one of claim 1-3, which is characterized in that
The non-return valve detection device includes oscillating circuit module and control unit module, and the oscillating circuit is according to described variable
The rectangular wave of the capacitance output certain frequency of formula capacitance, described control unit module are exported according to the oscillating circuit module
The frequency size of rectangular wave, judges the current state of the check-valves.
9. range hood according to claim 8, which is characterized in that
The oscillating circuit module includes：When base concussion chip, first resistor, second resistance and anti-tampering capacitance, base when described
Shaking chip has 8 pins；Wherein,
The first end of the pin 8 of base concussion chip, pin 4 and the first resistor is connected to power supply, first electricity when described
The second end of resistance is connected with the first end of the second resistance, the second end of the second resistance and the positive conductive plate phase
Even, the negative conductive plate ground connection, the pin 7 of base concussion chip is connected to the first resistor and the second resistance when described
Between, pin 2 and pin 6 are connected between the second resistance and the positive conductive plate, and base concussion chip draws when described
Foot 1 is grounded, and pin 5 is connected and is grounded after the anti-tampering capacitance, and pin 3 is output end.
10. range hood according to any one of claim 1-3, which is characterized in that
The non-return valve detection device further includes：Alarm module, when the check-valves is opened or closes abnormal, the alarm
Module automatic alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721696260.2U CN207648895U (en) | 2017-12-08 | 2017-12-08 | A kind of range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721696260.2U CN207648895U (en) | 2017-12-08 | 2017-12-08 | A kind of range hood |
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| Publication Number | Publication Date |
|---|---|
| CN207648895U true CN207648895U (en) | 2018-07-24 |
Family
ID=62879759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721696260.2U Active CN207648895U (en) | 2017-12-08 | 2017-12-08 | A kind of range hood |
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| Country | Link |
|---|---|
| CN (1) | CN207648895U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848453A (en) * | 2019-10-11 | 2020-02-28 | 宁波方太厨具有限公司 | State monitoring method for check valve |
| CN113217962A (en) * | 2021-05-24 | 2021-08-06 | 梁启明 | Range hood based on fluid pressure adsorption type |
-
2017
- 2017-12-08 CN CN201721696260.2U patent/CN207648895U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848453A (en) * | 2019-10-11 | 2020-02-28 | 宁波方太厨具有限公司 | State monitoring method for check valve |
| CN110848453B (en) * | 2019-10-11 | 2021-05-18 | 宁波方太厨具有限公司 | State monitoring method for check valve |
| CN113217962A (en) * | 2021-05-24 | 2021-08-06 | 梁启明 | Range hood based on fluid pressure adsorption type |
| CN113217962B (en) * | 2021-05-24 | 2024-04-02 | 华霸智能科技(广东)有限公司 | Range hood based on fluid pressure adsorption type |
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Effective date of registration: 20230526 Address after: Building 2, No. 52, 22nd Street, Baiyang Street, Qiantang New District, Hangzhou City, Zhejiang Province, 310000 Patentee after: Hangzhou Jiuchuang Home Appliances Co.,Ltd. Address before: No. 999, Mei Li Road, Huaiyin District, Ji'nan, Shandong Patentee before: JOYOUNG Co.,Ltd. |
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| TR01 | Transfer of patent right |