CN205747058U - A kind of range hood - Google Patents
A kind of range hood Download PDFInfo
- Publication number
- CN205747058U CN205747058U CN201620447829.0U CN201620447829U CN205747058U CN 205747058 U CN205747058 U CN 205747058U CN 201620447829 U CN201620447829 U CN 201620447829U CN 205747058 U CN205747058 U CN 205747058U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 16
- 239000013078 crystal Substances 0.000 claims description 3
- 230000005669 field effect Effects 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses a kind of range hood, belong to field of kitchen electric appliance, solve cornice door-plate close slow or close the problem of tong soon, the technical scheme solving this problem mainly includes body and cornice door-plate, cornice door-plate is articulated with body, body is provided with door-plate and drives motor and control circuit, door-plate drives motor to be in transmission connection with cornice door-plate, control circuit controls door-plate and drives motor to drive cornice door-plate to open or close, control circuit includes controller and motor-drive circuit, motor-drive circuit includes switch buck circuit, door-plate drives motor to electrically connect with switch buck circuit, switch buck circuit is electrically connected with the controller and is controlled to reduce door-plate by controller and drives the running voltage of motor.
Description
Technical field
This utility model relates to kitchen appliance, particularly a kind of range hood.
Background technology
In existing range hood, electronic cornice door-plate can be set at the top of body, close when cornice door-plate can be opened after powering or shut down, in cornice door-plate running from open mode to closed mode, if movement velocity is the slowest, then the unresponsive impression of cause the user electrical equipment, if movement velocity is too fast, user has little time reaction, in fact it could happen that the potential safety hazards such as cornice door-plate tong.
Summary of the invention
The purpose that this utility model is to be reached just is to provide a kind of range hood, can reduce the time that cornice door-plate cuts out, be avoided that again cornice door-plate tong.
In order to achieve the above object, this utility model adopts the following technical scheme that a kind of range hood, including body and cornice door-plate, cornice door-plate is articulated with body, body is provided with door-plate and drives motor and control circuit, door-plate drives motor to be in transmission connection with cornice door-plate, control circuit controls door-plate and drives motor to drive cornice door-plate to open or close, control circuit includes controller and motor-drive circuit, motor-drive circuit includes switch buck circuit, door-plate drives motor to electrically connect with switch buck circuit, switch buck circuit is electrically connected with the controller and is controlled to reduce door-plate by controller and drives the running voltage of motor.
Further, described switch buck circuit includes electrical switch, and controller controls electrical switch break-make by pulse signal and reduces the operating current by door-plate driving motor.
Further, described electrical switch is IGCT, transistor, field effect transistor or controllable silicon.
Further, described electrical switch is crystal triode.
Further, described electrical switch includes a NPN type triode and a PNP type triode, controller electrically connects with the B pole of NPN type triode, the C pole of NPN type triode electrically connects with the B pole of PNP type triode and is connected to drive power vd D, the E pole ground connection of NPN type triode, the E pole of PNP type triode drives motor to electrically connect with door-plate, the C pole ground connection of PNP type triode.
Further, described motor-drive circuit includes motor reversing circuit, door-plate drives motor to be electrically connected in motor reversing circuit, and motor reversing circuit is electrically connected with the controller and is controlled commutation by controller, and the input of switch buck circuit electrically connects with the outfan of motor reversing circuit.
Further, described motor-drive circuit includes voltage detecting circuit, and voltage detecting circuit electrically connects with outfan, the controller of switch buck circuit respectively.
Further, described voltage detecting circuit includes detecting resistance, and one end of detection resistance electrically connects with outfan, the controller of switch buck circuit respectively.
Further, the other end ground connection of described detection resistance.
Further, described body is provided with microswitch, and control circuit includes detecting the switch detection circuit that microswitch is opened or closed, and switch detection circuit electrically connects with microswitch, controller respectively.
After using technique scheme, this utility model has the advantage that owing to door-plate drives the running voltage of motor constantly to reduce, and door-plate can be made to drive the rotating speed of motor to be gradually lowered, so that cornice door-plate closing velocity declines, be difficult to clip to the hands of user.And in order to improve the speed that cornice door-plate cuts out, can control within a period of time begun to shut off, door-plate drives motor to keep rated voltage work, make cornice door-plate close at full speed, when cornice door-plate cuts out the angle being likely to occur tong, then start to reduce the running voltage of door-plate driving motor, user so can not only be allowed to experience the speed that cornice door-plate cuts out, make Consumer's Experience more preferable, and the probability of tong can be reduced, improve safety in utilization.
Accompanying drawing explanation
The utility model is described in further detail below in conjunction with the accompanying drawings:
Fig. 1 is the structural representation of range hood in this utility model；
Figure 1A is the enlarged drawing in Fig. 1 at I；
Fig. 2 is the schematic diagram (having microswitch) of control circuit in this utility model；
Fig. 3 is that in this utility model, door-plate drives motor voltage-vs-time graph of a relation in cornice door-plate closing process；
Fig. 4 is the schematic diagram (without microswitch) of control circuit in this utility model.
Detailed description of the invention
This utility model provides a kind of range hood, as shown in Figure 1, including body 1 and cornice door-plate 2, cornice door-plate 2 is articulated with the top, front side of body 1, body 1 is provided with door-plate and drives motor and control circuit, door-plate drives motor to be in transmission connection with cornice door-plate 2, control circuit controls door-plate and drives motor to drive cornice door-plate 2 to open or close, control circuit includes controller 3 and motor-drive circuit, motor-drive circuit is as shown in Figure 2, motor-drive circuit includes switch buck circuit 4, door-plate drives motor M to electrically connect with switch buck circuit 4, switch buck circuit 4 electrically connects with controller 3 and is controlled to reduce door-plate by controller 3 and drives the running voltage of motor M.Owing to door-plate drives the running voltage of motor M constantly to reduce, door-plate can be made to drive the rotating speed of motor M to be gradually lowered, so that cornice door-plate 2 closing velocity declines, be difficult to clip to the hands of user.And in order to improve the speed that cornice door-plate 2 cuts out, can control within a period of time begun to shut off, door-plate drives motor M to keep rated voltage work, make cornice door-plate 2 close at full speed, when cornice door-plate 2 cuts out to when being likely to occur the angle of tong, then start to reduce the running voltage of door-plate driving motor M, user so can not only be allowed to experience the speed that cornice door-plate 2 cuts out, make Consumer's Experience more preferable, and the probability of tong can be reduced, improve safety in utilization.
Switch buck circuit 4 includes electrical switch, in order to avoid the pause and transition in rhythm or melody sense that cornice door-plate 2 cuts out occurs, controller 3 controls electrical switch break-make by pulse signal and reduces the operating current by door-plate driving motor M, thus realizes reducing door-plate and drive the running voltage of motor.Owing to the frequency of pulse signal is higher, comparing the mode of relay adhesive, electrical switch is quick on the draw, and break-make speed is very fast, and does not has noise, feels it is that door-plate drives motor M work always to user, experiences preferable.Generally suitable IGCT, transistor, field effect transistor or the controllable silicon in the market of electrical switch.
In the embodiment depicted in figure 2, electrical switch have selected crystal triode.Electrical switch includes NPN type triode Q1 and PNP type triode Q2, controller 3 is electrically connected with the B pole of NPN type triode Q1 by resistance R3, the C pole of NPN type triode Q1 electrically connects with the B pole of PNP type triode Q2 and is connected to drive power vd D, resistance R2 ground connection is passed through in the E pole of NPN type triode Q1, the E pole of PNP type triode Q2 drives motor M to electrically connect with door-plate, the C pole ground connection of PNP type triode Q2.
In addition, motor-drive circuit includes motor reversing circuit 5, door-plate drives motor M to be electrically connected in motor reversing circuit 5, motor reversing circuit 5 electrically connects with controller 3 and is controlled commutation by controller 3, the input of switch buck circuit 4 electrically connects with the outfan of motor reversing circuit 5, i.e. the E pole of PNP type triode Q2 electrically connects with the outfan of motor reversing circuit 5.Motor reversing circuit 5 uses two relay K 1, K2 to realize, such as K1 adhesive, 1 contact of K1 is held on 3 contacts, the non-adhesive of K2,1 contact of K2 is held on 2 contacts, now the driving power vd D of the 2 contact electrical connections of K2 drives motor M to provide power supply for door-plate, and now door-plate drives motor M reversion.And after commutating, the non-adhesive of K1,1 contact of K1 and 2 contacts are held on, K2 adhesive, and 1 contact of K2 and 3 contacts are held on, and the driving power vd D of the 2 contacts electrical connections of K1 is that door-plate drives motor M to provide power supply, now door-plate driving motor M rotating forward.
In order to improve the safety of use, motor-drive circuit includes voltage detecting circuit 6, and voltage detecting circuit 6 electrically connects with outfan, the controller 3 of switch buck circuit 4 respectively.Simplest mode is to be realized by detection resistance R1, and one end of detection resistance R1 electrically connects with outfan, the controller 3 of switch buck circuit 4 respectively, and the other end of detection resistance R1 can be with ground connection.In Fig. 2 embodiment, the C pole of i.e. PNP type triode Q2 of the outfan of switch buck circuit 4.During cornice door-plate 2 is opened, when controller 3 detects electric voltage exception, be such as 2～4 times of normal value, then explanation cornice door-plate 2 is opened and is put in place.During cornice door-plate 2 cuts out, when controller 3 detects electric voltage exception, then explanation cornice door-plate 2 cuts out and puts in place or clip to object.
Therefore to allow controller 3 can offer a clear explanation cornice door-plate 2 be close put in place or clip to object, body 1 is provided with microswitch SW, sees Figure 1A.Microswitch SW being included accordingly in control circuit, control circuit includes detecting the switch detection circuit 7 that microswitch SW is opened or closed, and switch detection circuit 7 electrically connects with microswitch SW, controller 3 respectively.Switch detection circuit 7 is in, for detecting microswitch SW, the state that Guan Bi is also off, as long as therefore the circuit of detection series connection microswitch SW is path or open circuit i.e. can determine whether.Such as in Fig. 2, switch detection circuit 7 includes divider resistance R4, one end loading power voltage VCC of divider resistance R4, the other end are electrically connected one end and the controller 3 of microswitch SW, the other end ground connection of microswitch SW, when microswitch SW disconnects, controller 3 can't detect pressure drop, when microswitch SW closes, and controller 3 detects pressure drop.During cornice door-plate 2 cuts out, when controller 3 detects electric voltage exception, microswitch SW disconnects, then explanation cornice door-plate 2 clips to object.Controller 3 now can be allowed to control motor reversing circuit 5 allows door-plate drive motor M to reversely rotate, and makes cornice door-plate 2 reopen, it is to avoid the hands of grip objects, such as user.Can also stop in time driving motor M to power to door-plate, make cornice door-plate 2 stop.
In actual use, controller 3 sends shutdown command after receiving off signal, control door-plate drives motor M start closedown cornice door-plate 2 and work under rated voltage simultaneously, cornice door-plate 2 starts to cut out at full speed, when being close to the possible any position of tong, the such as bottom of cornice door-plate 2 to the distance of body 1 be 50mm time, controller 3 sends pwm pulse signal, control electrical switch break-make and reduce the operating current being driven motor M by door-plate, thus reduce door-plate and drive the rotating speed of motor M, meet GB GB4706 2008 requirement simultaneously.How to know that the bottom of cornice door-plate 2 begins to send out pwm pulse signal when being 50mm to the distance of body 1 specific to controller 3, time control can be converted into, as shown in Figure 3, door-plate driving motor M works after the T1 time under rated voltage, now the bottom of cornice door-plate 2 is 50mm to the distance of body 1, then controller 3 begins to send out pwm pulse signal, and through the T2 time, door-plate drives motor M to quit work.And the frequency of pwm pulse signal can be controlled, within the T2 time, the value making door-plate drive the operating current of motor M to decline after each break-make of electrical switch is equal in magnitude, so that door-plate drives the running voltage " even successively decrease " of motor M, drop 0.3V the most every time, be reduced to 0 from 12V, 12/0.3=40 level, within the T2 time, 40 grades of pressure reduction form stepped line and can be approximated to an oblique line, the tomography of the imperceptible centre of user.In actual use, T1 can control 3～20 seconds, and T2 can control at 3.34～8 seconds.
In above-described embodiment, it is also possible to be not provided with microswitch SW, as shown in Figure 4.During cornice door-plate 2 cuts out, when controller 3 detects electric voltage exception, can stop in time driving motor M to power to door-plate, make cornice door-plate 2 stop, if now tong, then it can be avoided that user to be caused further injury.
In addition to above preferred embodiment, this utility model also has other embodiment, those skilled in the art can be variously modified according to this utility model and deform, and without departing from spirit of the present utility model, all should belong to scope defined in this utility model claims.
Claims (10)
1. a range hood, including body and cornice door-plate, cornice door-plate is articulated with body, body is provided with door-plate and drives motor and control circuit, door-plate drives motor to be in transmission connection with cornice door-plate, control circuit controls door-plate and drives motor to drive cornice door-plate to open or close, it is characterized in that: described control circuit includes controller and motor-drive circuit, motor-drive circuit includes switch buck circuit, door-plate drives motor to electrically connect with switch buck circuit, switch buck circuit is electrically connected with the controller and is controlled to reduce door-plate by controller and drives the running voltage of motor.
Range hood the most according to claim 1, it is characterised in that: described switch buck circuit includes electrical switch, and controller controls electrical switch break-make by pulse signal and reduces the operating current by door-plate driving motor.
Range hood the most according to claim 2, it is characterised in that: described electrical switch is IGCT, transistor, field effect transistor or controllable silicon.
Range hood the most according to claim 3, it is characterised in that: described electrical switch is crystal triode.
Range hood the most according to claim 4, it is characterized in that: described electrical switch includes a NPN type triode and a PNP type triode, controller electrically connects with the B pole of NPN type triode, the C pole of NPN type triode electrically connects with the B pole of PNP type triode and is connected to drive power vd D, the E pole ground connection of NPN type triode, the E pole of PNP type triode drives motor to electrically connect with door-plate, the C pole ground connection of PNP type triode.
6. according to the arbitrary described range hood of claim 1 to 5, it is characterized in that: described motor-drive circuit includes motor reversing circuit, door-plate drives motor to be electrically connected in motor reversing circuit, motor reversing circuit is electrically connected with the controller and is controlled commutation by controller, and the input of switch buck circuit electrically connects with the outfan of motor reversing circuit.
7. according to the arbitrary described range hood of claim 1 to 5, it is characterised in that: described motor-drive circuit includes voltage detecting circuit, and voltage detecting circuit electrically connects with outfan, the controller of switch buck circuit respectively.
Range hood the most according to claim 7, it is characterised in that: described voltage detecting circuit includes detecting resistance, and one end of detection resistance electrically connects with outfan, the controller of switch buck circuit respectively.
Range hood the most according to claim 8, it is characterised in that: the other end ground connection of described detection resistance.
10. according to the arbitrary described range hood of claim 1 to 5, it is characterized in that: described body is provided with microswitch, control circuit includes detecting the switch detection circuit that microswitch is opened or closed, and switch detection circuit electrically connects with microswitch, controller respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620447829.0U CN205747058U (en) | 2016-05-17 | 2016-05-17 | A kind of range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620447829.0U CN205747058U (en) | 2016-05-17 | 2016-05-17 | A kind of range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205747058U true CN205747058U (en) | 2016-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620447829.0U Expired - Fee Related CN205747058U (en) | 2016-05-17 | 2016-05-17 | A kind of range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205747058U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940524A (en) * | 2017-11-06 | 2018-04-20 | 广东美的厨房电器制造有限公司 | The control method of smoke machine and smoke machine panel |
| CN112013444A (en) * | 2020-09-30 | 2020-12-01 | 广东万家乐燃气具有限公司 | Range hood and baffle driving motor control method and device thereof |
-
2016
- 2016-05-17 CN CN201620447829.0U patent/CN205747058U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940524A (en) * | 2017-11-06 | 2018-04-20 | 广东美的厨房电器制造有限公司 | The control method of smoke machine and smoke machine panel |
| CN112013444A (en) * | 2020-09-30 | 2020-12-01 | 广东万家乐燃气具有限公司 | Range hood and baffle driving motor control method and device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 |