CN110542034B - Laboratory fume chamber LED light - Google Patents
Laboratory fume chamber LED light Download PDFInfo
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- CN110542034B CN110542034B CN201910791251.9A CN201910791251A CN110542034B CN 110542034 B CN110542034 B CN 110542034B CN 201910791251 A CN201910791251 A CN 201910791251A CN 110542034 B CN110542034 B CN 110542034B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V1/00—Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
- F21V1/02—Frames
- F21V1/06—Frames foldable or collapsible
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
- F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
- F21V23/005—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate is supporting also the light source
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
- F21V23/0435—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by remote control means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention relates to the technical field of ventilating hood illuminating lamps, in particular to a laboratory ventilating hood LED illuminating lamp which comprises a background lamp, a front pillar lamp, a top lamp and a power supply system, wherein intelligent switches are arranged between the front pillar lamp and the top lamp and between the front pillar lamp and the power supply system, infrared transmitters are arranged on two sides of the lower end of a ventilating hood body, infrared receivers are arranged on two sides of the lower end of a sliding door, the intelligent switches, the infrared transmitters and the infrared receivers are respectively and electrically connected with a single chip microcomputer, when the infrared receivers receive signals sent by the infrared transmitters, the single chip microcomputer receives the signals sent by the infrared receivers and controls corresponding induction switches to turn off the front pillar lamp and the top lamp, and the illuminating lamp cannot be directly projected towards the outer side of a cabinet body in an experimental state, so that the eyes of an experimenter are effectively protected, and the observation and experiment, the illuminating lamp only works with a background lamp in a non-experimental state, so that energy is saved.
Description
Technical Field
The invention relates to the technical field of ventilating cabinet illuminating lamps, in particular to a laboratory ventilating cabinet LED illuminating lamp.
Background
The laboratory fume hood is the most concentrated area of laboratory pollution, also is the key position of laboratory pollution control, especially explosive, flammable, endanger people's health and safe test all must be carried out in the fume hood, and fume hood daylighting is when carrying out the test in the fume hood, one of the necessary condition, especially night.
The LED is a cold light source, the semiconductor illumination does not pollute the environment, and compared with incandescent lamps and fluorescent lamps, the power-saving efficiency can reach more than 90%. At the same brightness, the power consumption is only 1/10 of the common incandescent lamp and 1/2 of the fluorescent lamp tube. If the LED is used for replacing 50% of the traditional illumination, the electricity saved in China every year is equivalent to the sum of the generated energy of a three gorges power station, and the energy-saving benefit is considerable.
Chinese patent CN106439633A discloses a laboratory fume hood OLED lighting lamp, which comprises a fume hood body, wherein a fume hood glass window and an OLED panel lamp are compounded into a whole, and the laboratory fume hood OLED lighting lamp is characterized in that any one of the upper, middle, lower, left and right parts of a groove is processed on the outer surface or in the outer surface of the front side or the side surface or the back glass window of the existing single-door or multi-door fume hood, a square, rectangular or circular OLED panel lamp is pasted or embedded, and the fume hood OLED lighting lamp is manufactured on the outer surface or in the groove of the outer surface of the glass window of the fume hood; compared with the existing ventilating cabinet lamp, the multifunctional ventilating cabinet lamp has the advantages of high light source quality, good use safety, multifunction, low comprehensive cost and the like.
However, the fume hood lights disclosed in this patent do not provide power savings. In order to save energy and protect environment, a technology is needed to turn off a part of lamps when experimenters do not operate experiments, so that electric quantity is greatly saved, and the turned-off lamps can be turned on in time when the experimenters need to operate the experiments. Simultaneously, the light of laboratory fume chamber among the prior art generally installs in the region that laboratory staff's naked eye can be directly seen, when having lighted the fume chamber, also can bring very big burden for laboratory staff's eyes, and light pollution is serious, needs one kind can light up whole fume chamber and be in the light of the position that laboratory staff can not be directly seen again simultaneously.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the LED illuminating lamp for the laboratory fume hood, when an experimenter operates an experiment, all illuminating lamps of the fume hood are fully lighted, when the experiment is not operated, a part of illuminating lamps can be intelligently turned off, and the electric quantity is saved. The illuminating lamp only works with a background lamp in a non-experimental state, and is energy-saving and environment-friendly.
The utility model provides a laboratory fume chamber body LED light, includes:
the background light is fixedly arranged on the guide plate of the fume hood body and is parallel to the guide plate along the length direction,
the front pillar lamp is vertically arranged and fixedly installed behind the stand columns on two sides of the front end of the fume hood body;
the top lamp is fixedly arranged at the top end of the fume hood body and is positioned between the air supplementing port and the guide plate,
the power supply system is provided with a manual switch between each illuminating lamp and the power supply system; intelligent switches are arranged between the front pillar lamp and the top lamp and the power supply system respectively;
each intelligent switch is connected with a single chip microcomputer, and the single chip microcomputer can control the on-off of each intelligent switch; the single chip microcomputer is also electrically connected with an infrared emitter and an infrared receiver, and the infrared emitter is arranged on two sides of the lower end of a cabinet opening of the fume hood body;
the fume hood comprises a fume hood body and is characterized in that a sliding door which slides up and down is arranged at a hood opening of the fume hood body, the sliding door and the fume hood body form an experimental area, and infrared receivers are arranged on two sides of the lower end of the sliding door; when the infrared receiver is opposite to the infrared transmitter, the infrared receiver can receive signals transmitted by the infrared transmitter, the infrared receiver transmits the signals to the single chip microcomputer, and meanwhile, the single chip microcomputer receives the signals transmitted by the infrared receiver and controls the corresponding intelligent switch to turn off or turn on the front pillar lamp and the top lamp.
Further, the bottom both sides of sliding door still are provided with laser range finder, laser range finder is connected with the single chip microcomputer electricity, laser range finder is used for detecting the distance of sliding door bottom and fume cupboard body operation mesa, slides down or upwards slides when the sliding door, then the distance that the sliding door bottom that laser range finder will measure in real time and fume cupboard body operation mesa sends to the singlechip, and the singlechip analysis judges that the sliding door is down to slide or upwards slides.
Further, when the single chip microcomputer receives a signal of the laser range finder and analyzes that the sliding door slides downwards, and when the single chip microcomputer receives a signal sent by the infrared receiver, the single chip microcomputer controls the intelligent switch to close the front pillar lamp and the top lamp; when the single chip microcomputer receives the signal of the laser range finder and analyzes that the sliding door slides upwards and does not receive the signal sent by the infrared receiver, the single chip microcomputer controls the intelligent switch to turn on the front pillar lamp and the top lamp.
Further, the background light is including the guide plate lighting fixture with install in the inside first LED lamp area of guide plate lighting fixture, the guide plate lighting fixture encircles the vertical position setting of guide plate and forms a square frame, first LED lamp area is installed inside each limit of this square frame, the guide plate lighting fixture is provided with the first light screen of inside extension for the both sides in first LED lamp area, first light screen shelters from the slip gate that first LED lamp area made its light of sending can not penetrate the fume chamber body directly, the inner wall of guide plate lighting fixture and first light screen scribbles reflecting material.
Furthermore, the first LED lamp strip comprises LED lamps and a circuit board, the LED lamps are arranged in a row and mounted on the circuit board, each LED lamp is fixedly provided with a triangular folding block, the circuit board is electrically connected with a power supply system, the triangular folding blocks are transparent triangular blocks, projections of the triangular folding blocks in the directions of two sides of the circuit board are isosceles triangles, and long sides of the isosceles triangles are attached to the surfaces of the LED lamps.
Further, the front pillar lamp is including the front pillar lighting fixture with install in the inside second LED lamp area of front pillar lighting fixture, second LED lamp area is the looks isostructure with first LED lamp area, the laminating of front pillar lighting fixture is inboard at the front pillar of fume chamber body, the front pillar lighting fixture extends to the height with guide plate lighting fixture top parallel and level from bottom to top from the front pillar of fume chamber body, front pillar lighting fixture projection in vertical side is right angled triangle, two right-angle sides of this right angled triangle respectively with the inner wall butt of fume chamber body front pillar, the both sides of front pillar lighting fixture are provided with second light screen and third light screen, the second light screen is on a parallel with the sliding door and extends towards the front pillar lighting fixture of opposite side, third perpendicular to fume chamber body sliding door extends towards the direction of keeping away from the sliding door, second light screen and the inside reflecting material that all scribbles of third light screen.
Further, the dome lamp is including many parallel arrangement's dome lamp lighting fixture and install in the inside third LED lamp area of dome lamp lighting fixture, third LED lamp area is the looks isostructure with first LED lamp area, the dome lamp lighting fixture is for being on a parallel with the rectangular shape of fume chamber body roof, be provided with the fourth light screen that the level extends towards the guide plate around the dome lamp lighting fixture, the inner wall of dome lamp lighting fixture and fourth light screen all scribbles reflecting material, the dome lamp lighting fixture is still including installing the guide plate reflector layer on guide plate top slope position, the laminating of guide plate reflector layer is at the slope position on guide plate top.
Furthermore, the circuit of the power supply system comprises a first diode D1, a second diode D2, a first transistor Q1 and a second transistor Q2, wherein the emitter of the first transistor Q1 is connected with the cathode of the second diode D2, the base of the first transistor Q1 is connected with the anode of the second diode D2, the two ends of the second diode D2 are sequentially connected with a seventh resistor R7 in parallel, a second capacitor C2 and a fourth resistor R4, the collector of the first transistor Q1 is connected to the base of the second transistor Q2, the base of the first transistor Q1 is also connected to the collector of the second transistor Q2, the emitter of the second transistor Q2 is connected to the sixth resistor R6 and the third capacitor C3, the other ends of the sixth resistor R6 and the third capacitor C3 are grounded, the base of the second transistor Q2 is also connected to one ends of the fifth resistor R5, the first capacitor C1 and the third resistor R3, and the other ends of the fifth resistor R5 and the first capacitor C1 are grounded; the anode of the first diode D1 is sequentially connected with a first resistor R1 and a second resistor R2 in series, the other end of the second resistor R2 is grounded, and a first branch is led out from the connection point of the first resistor R1 and the second resistor R2 and is connected with the other end of a third resistor R3; the emitter of the first transistor Q1 is the output terminal.
Furthermore, a fifth light shielding plate is arranged below the first light shielding plate, the first light shielding plate and the fifth light shielding plate are connected through an intermediate mechanism, and the intermediate mechanism is a bendable connecting piece; the fifth shading plate is turned upwards by taking the middle mechanism as a turning line; a fastener is arranged at the upper end of the first shading plate, an intermediate belt is arranged on the fastener, an insert is arranged at the other end of the intermediate belt, a bulge is arranged on the insert, and a safety switch is further arranged on the insert; the lower end of the fifth shading plate is provided with a bending part extending outwards, the bending part is provided with an insertion groove, the insertion groove is provided with an insertion notch, and the insertion notch is matched with the bulge; the fastener is provided with a rotating mechanism which enables the middle belt to move; likewise, a sixth light shielding plate, a seventh light shielding plate and an eighth light shielding plate are respectively disposed below the second light shielding plate, the third light shielding plate and the fourth light shielding plate.
Has the advantages that:
utilize infrared receiver and infrared emitter's that sets up on fume chamber body and the sliding door signalling and signal reception to thereby utilize single chip microcomputer control intelligence switch to close front pillar lamp and dome lamp, thereby when the experimenter does not operate the experiment, only leave the background light, thereby the energy can be saved.
The first LED lamp strip is a normally bright background lamp, the first LED lamp strip emits light along the direction parallel to the guide plate, light emitted to two sides of the first LED lamp strip is shielded by the first light shielding plate, so that the first LED lamp strip cannot directly penetrate the sliding door (namely the sliding door of the fume hood body) and cannot directly penetrate to two eyes of an experimenter, the light shielded by the first light shielding plate of the first LED lamp strip is refracted by the guide plate lamp bracket and a reflecting layer coated on the inner part of the first light shielding plate, and is irradiated towards the observation windows and the guide plate on two sides of the cabinet body, and the guide plate performs diffuse reflection on the light, so that the inner part of the cabinet body is always filled with soft light;
the fourth light screen restrains the light rays emitted by the third LED lamp strip to horizontally irradiate towards the reflecting layer of the guide plate, and the light rays irradiate onto the reflecting layer of the guide plate and are reflected downwards by the reflecting layer of the guide plate, so that the light rays emitted by the third LED lamp strip irradiate towards the bottom end of the fume hood body;
the second LED lamp strip is fixedly arranged on the front column lamp holder and emits light rays towards the inside of the cabinet body from the front column of the ventilation cabinet body, and the light rays emitted by the second LED lamp strip towards the side observation window and the sliding door of the cabinet body are shielded and reflected by the second light shielding plate and the third light shielding plate, so that the light rays emitted by the second LED lamp strip can only irradiate the inside of the cabinet body, the defect of a dome lamp is overcome, and meanwhile, light pollution cannot be generated;
the power supply system is provided with the static discharge circuit, so that the OLED lamp can be stabilized, and the phenomenon that the flash of the OLED lamp damages eyes is avoided;
the areas of the light shielding plates can be adjusted, so that the eyes of experimenters are effectively and deeply protected, and the influence of light pollution is avoided;
in general, in order to save energy, the front pillar lamp and the top lamp are turned off through a switch, and only the background lamp is kept to be normally on; when the sliding door is closed, the corresponding intelligent switch is powered off, so that only the background lamp in the cabinet is normally on, and when the sliding door is opened, the intelligent switch is powered on, so that the front pillar lamp and the top lamp work.
1. The illuminating lamp cannot be directly projected towards the outer side of the cabinet body, so that the eyes of experimenters are effectively protected, and the observation experiment process of the experimenters is prevented from being influenced by light pollution;
2. the illuminating lamp only works with a background lamp in a non-experimental state, so that energy is saved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic block diagram of a single-chip microcomputer controlling a corresponding intelligent switch;
FIG. 2 is a perspective view of a fume hood body and a light according to one embodiment;
FIG. 3 is a partial enlarged view of the embodiment shown in FIG. 2;
FIG. 4 is a side sectional view of the embodiment;
FIG. 5 is a perspective cross-sectional view of the embodiment (the sliding door is not shown in FIG. 5);
FIG. 6 is a perspective view of the fume hood body of the embodiment shown removed;
FIG. 7 is a perspective cut-away view of a backlight of an embodiment;
FIG. 8 is a partial enlarged view of the embodiment shown in FIG. 7 at B;
FIG. 9 is a top cross-sectional view of a front pillar light of an embodiment;
FIG. 10 is a side cross-sectional view of an exemplary dome lamp;
FIG. 11 is a partial enlarged view of the embodiment of FIG. 10 at C;
FIG. 12 is a perspective view of the embodiment of FIG. 11;
FIG. 13 is a schematic diagram of an electrical circuit included in the power supply system in one embodiment;
FIG. 14 is a schematic diagram of the relative positions of the first and fifth shutter plates in one embodiment;
FIG. 15 is a schematic view of fasteners on the first and fifth shutter plates in one embodiment.
Description of reference numerals: the LED illuminating lamp comprises a background lamp 1, a guide plate lamp holder 1a, a first light shading plate 1a1, a first LED lamp strip 1b, an LED lamp 1b1, a circuit board 1b2, a three-edged light folding block 1b3, a sealing strip 1c, a front pillar lamp 2, a front pillar lamp holder 2a, a second light shading plate 2a1, a third light shading plate 2a2, a second LED lamp strip 2b, a sealing strip 2c, a top lamp 3, a top lamp holder 3a, a fourth light shading plate 3a1, a guide plate reflecting layer 3a2, a third LED lamp strip 3b, a sealing strip 3c, a power supply system 4, a manual switch 4a, an intelligent switch 4b, a single chip microcomputer 20, an infrared emitter 23, an infrared receiver 24 and a laser range finder 30.
Detailed Description
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The existing lighting method has the advantages that firstly, all lighting lamps in the laboratory ventilation cabinet body are only provided with one control switch, and when an experimenter does not operate an experiment, all the lighting lamps are on or only all the lighting lamps can be turned off. Some lamps cannot be turned off to save energy. In addition on the one hand, the light of laboratory fume chamber body among the prior art generally installs in the region that laboratory staff naked eye can be directly viewed, when having illuminated the fume chamber body, also can bring very big burden for laboratory staff's eyes, and light pollution is serious, causes dazzlingly phenomenon easily.
As will be described with reference to figures 1-15,
the invention provides a laboratory fume chamber body LED light, which comprises:
the background light 1 is fixed on a guide plate of the fume hood body, the background light 1 is parallel to the guide plate along the length direction,
the front pillar lamp 2 is vertically arranged and fixedly installed behind the stand columns on two sides of the front end of the fume hood body;
the dome lamp 3 is fixedly arranged at the top end of the fume hood body and is positioned between the air supplementing port and the guide plate,
the power supply system 4 is provided with a manual switch 4a between each illuminating lamp and the power supply system 4, and an intelligent switch 4b is also arranged between each front pillar lamp 2 and the top lamp 3 and the power supply system;
each intelligent switch 4b is connected with a single chip microcomputer 20, and the single chip microcomputer 20 can control the on-off of each intelligent switch 4 b; the single chip microcomputer 20 is also electrically connected with an infrared emitter 23 and an infrared receiver 24, and the infrared emitter 23 is arranged on two sides of the lower end of the cabinet opening of the fume hood body;
a sliding door capable of sliding up and down is arranged at a cabinet opening of the fume hood body, the sliding door and the fume hood body form an experimental area, and infrared receivers 24 are arranged on two sides of the lower end of the sliding door; when the infrared receiver 24 is opposite to the infrared emitter 23, the infrared receiver 24 can receive a signal emitted by the infrared emitter 23, the infrared receiver 24 transmits the signal to the single chip microcomputer 20, and meanwhile, the single chip microcomputer 20 receives the signal emitted by the infrared receiver 24 and controls the corresponding intelligent switch 22 to turn off the front pillar lamp 2 and the dome lamp 3; as shown with reference to fig. 1.
The principle and the beneficial effect of the scheme are as follows: through above-mentioned design, when sliding door pulled to the lowest end and pulled to the operation mesa department of fume chamber body promptly, infrared receiver can receive the signal that infrared emitter sent, infrared receiver sends received signal transmission to singlechip, and the singlechip closes front pillar lamp and dome lamp to intelligence switch send instruction. Thereby saving energy. In the present invention, the structure of the sliding door is not limited, and belongs to the content of the prior art.
Further, the bottom both sides of sliding door still are provided with laser range finder, laser range finder is connected with the single chip microcomputer electricity, laser range finder is used for detecting the distance of sliding door bottom and fume cupboard body operation mesa, slides downwards or upwards slides when the sliding door, then laser range finder will measure in real time the sliding door bottom with fume cupboard body operation mesa's distance send to the singlechip, the singlechip analysis judges the sliding door down to slide or the lapse.
Further, when the single chip microcomputer receives a signal of the laser range finder and analyzes that the sliding door slides downwards, and when the single chip microcomputer receives a signal sent by the infrared receiver, the single chip microcomputer controls the intelligent switch to close the front pillar lamp 2 and the top lamp 3; when the single chip microcomputer receives the signal of the laser range finder and analyzes that the sliding door slides upwards, and the single chip microcomputer does not receive the signal sent by the infrared receiver, the single chip microcomputer controls the intelligent switch to turn on the front pillar lamp 2 and the top lamp 3.
The principle and the beneficial effect of the scheme are as follows: through set up laser range finder on the sliding door, can realize when the sliding door upwards promotes, can open the front pillar lamp and the dome lamp of closing. Instead of using a single infrared receiver and infrared transmitter.
Only when the distance that laser range finder surveyed diminishes, the singlechip analysis is to sliding door down-draw to during infrared receiver received the signal of infrared emitter transmission, the singlechip just can send instruction to intelligent switch and close front pillar lamp and dome lamp, thereby realize two factor control better, make the switch of front pillar lamp and dome lamp more accurate, more be favorable to saving the power.
Referring to fig. 1 to 12 show a laboratory fume chamber LED light, including background light 1, front pillar lamp 2, dome lamp 3 and power supply system 4, background light 1 fixed mounting is on the guide plate of fume chamber body, the vertical setting of front pillar lamp 2 is and the stand rear of fixed mounting in fume chamber body front end both sides, 3 fixed mounting of dome lamp are on the top of fume chamber body and lie in between tonifying qi mouth and the guide plate, background light 1's illumination direction level is parallel with the guide plate, the illumination direction slope of front pillar lamp 2 sets up towards the guide plate, the illumination direction level of dome lamp 3 sets up towards the guide plate, background light 1, front pillar lamp 2 and dome lamp 3 all with power supply system 4 electric connection.
The background light 1 is a normally-on background light, and irradiates light in a direction parallel to the guide plate and reflects light forward through diffuse reflection of the guide plate, so that the interior of the fume hood body always has certain brightness, an experimenter can find abnormality in the interior of the fume hood body through the transparent sliding door and the side plates, meanwhile, the background light cannot directly irradiate human eyes, and the brightness is low, so that other work of the experimenter cannot be influenced;
The background light 1 is including guide plate lighting fixture 1a and install at the inside first LED lamp area 1b of guide plate lighting fixture 1a, guide plate lighting fixture 1a encircles the vertical position setting of guide plate and forms a square frame, first LED lamp area 1b is installed inside each limit of this square frame, guide plate lighting fixture 1a is provided with the first light screen 1a1 of inside extension for the both sides of first LED lamp area 1b, first light screen 1a1 shelters from first LED lamp area 1b and makes the sliding door of fume chamber body can not be shone directly to the light that it sent, the inner wall of guide plate lighting fixture 1a and first light screen 1a1 scribbles reflecting material.
First LED lamp area 1b encircles on the guide plate along guide plate lighting fixture 1 a's inner wall, first LED lamp area 1b is luminous along the direction that is on a parallel with the guide plate, light that first LED lamp area 1b sent to its both sides is sheltered by first light screen 1a1, make first LED lamp area 1b can not penetrate sliding door department directly, just can not be directly to experimenter's both eyes yet, the light that first LED lamp area 1b was sheltered by first light screen 1a1 is reflected by the reflector layer refraction that guide plate lighting fixture 1a and first light screen 1a1 are inside to be scribbled, thereby shine towards observation window and the guide plate of cabinet body both sides, the guide plate carries out the diffuse reflection to this light, thereby make the internal portion of cabinet to be full of soft light all the time.
The first LED lamp strip 1b comprises LED lamps 1b1 and a circuit board 1b2, a plurality of LED lamps 1b1 are arranged in a row and mounted on the circuit board 1b2, each LED lamp 1b1 is fixed with a triangular folding block 1b3, the circuit board 1b2 is electrically connected with the power supply system 4, the triangular folding block 1b3 is a transparent triangular block, projections of the triangular folding block 1b3 on two sides of the circuit board 1b2 are isosceles triangles, and long sides of the isosceles triangles are attached to the surface of the LED lamps 1b 1.
The triangular refraction block 1b3 can be a glass or transparent polyethylene block, the circuit board 1b2 supplies power to the LED lamp 1b1 through the power supply system 4, the LED lamp 1b1 emits light in a direction away from the circuit board 1b2, the light emitted by the LED lamp 1b1 perpendicularly enters the triangular refraction block 1b3, the light is perpendicular to the long side of the triangular refraction block 1b3 and is transmitted inside the triangular refraction block 1b3 and passes through the short side of the triangular refraction block 1b3 to be emitted, due to the fact that the external medium of the triangular refraction block 1b3 is air and different in medium, the light is refracted when exiting the short side of the triangular refraction block 1b3, the light is refracted to the two sides of the triangular refraction block 1b3 when departing from the triangular refraction block 1b3, and the light emitted by the LED lamp 1b1 is uniformly diffused outwards.
Still install sealing strip 1c on guide plate lighting fixture 1a, sealing strip 1c installs in one side that guide plate lighting fixture 1a was kept away from to first LED lamp area 1b, and sealing strip 1c is the square frame shape around the interior limit of first light screen 1a1, and sealing strip 1 c's both sides and first light screen 1a 1's inner wall butt, and sealing strip 1c uses transparent inert material to make.
The material of sealing strip 1c can be transparent polyethylene, and this material makes sealing strip 1c can not influence the outside luminous in first LED lamp area 1b, can also seal first LED lamp area 1b inside guide plate lighting fixture 1a, and polyethylene makes sealing strip 1c can not corroded by strong corrosive medicine for inert material to protection first LED lamp area 1b is not corroded by the volatile gaseous corrosion of strong corrosive medicine.
The front pillar lamp 2 comprises a front pillar lamp holder 2a and a second LED lamp strip 2b arranged inside the front pillar lamp holder 2a, the second LED lamp strip 2b and the first LED lamp strip 1b are in the same structure, the front pillar lamp holder 2a is attached to the inner side of the front pillar of the fume hood body, the front pillar lamp holder 2a extends from the bottom to the top of the fume hood body to a height flush with the top end of the guide plate lamp holder 1a, the projection of the front pillar lamp holder 2a in the vertical direction is a right triangle, two right-angle sides of this right triangle do not with the inner wall butt of fume chamber body front column, the both sides of front column lighting fixture 2a are provided with second light screen 2a1 and third light screen 2a2, second light screen 2a1 is on a parallel with the sliding door and extends towards the front column lighting fixture 2a of opposite side, third light screen 2a2 perpendicular to fume chamber body sliding door and extend towards the direction of keeping away from the sliding door, second light screen 2a1 and third light screen 2a2 are inside all scribbled reflecting material.
Second LED lamp area 2b fixed mounting is on front column lighting fixture 2a and from the front column of fume chamber body to internal portion light that sends of cabinet, and the light that second LED lamp area 2b sent towards cabinet side observation window and sliding door direction is sheltered from and is reflected by second light screen 2a1 and third light screen 2a2, thereby make the light that second LED lamp area 2b sent only can shine internal portion of cabinet, when having compensatied dome lamp 3 not enough, also can not produce light pollution.
Still install sealing strip 2c on front column lighting fixture 2a, sealing strip 2c installs in one side that front column lighting fixture 2a was kept away from to second LED lamp area 2b, sealing strip 2 c's both sides respectively with the inner wall butt of second light screen 2a1 and third light screen 2a2, the one side that front column lighting fixture 2a was kept away from to sealing strip 2c is the cambered surface, sealing strip 2c uses transparent inert material to make.
The material of sealing strip 2c can be for transparent polyethylene, this material makes sealing strip 2c can not influence the outside luminous in second LED lamp area 2b, can also seal second LED lamp area 2b inside preceding post lighting fixture 2a, polyethylene makes sealing strip 2c can not corroded by strong corrosive medicine for inert material, thereby protect second LED lamp area 2b not corroded by the volatile gaseous corrosion of strong corrosive medicine, sealing strip 2c is different medium with the inside air of preceding post lighting fixture 2a, the light slope that makes second LED lamp area 2b send is jeted into behind sealing strip 2c through the refraction, and refract towards both sides once more when passing sealing strip 2 c's arc edge, thereby second LED lamp area 2 b's irradiation range has been enlarged, make second LED lamp area 2 b's irradiation range wider and light more even.
The laminating of guide plate reflector layer 3a2 is at the slope position on fume chamber body guide plate top, thereby make guide plate reflector layer 3a2 be the reflector panel that a slope set up downwards, the light level that third LED lamp area 3b sent is retrained to fourth light screen 3a1 shines towards guide plate reflector layer 3a2, light shines to be reflected downwards by guide plate reflector layer 3a2 on guide plate reflector layer 3a2, thereby make the light that third LED lamp area 3b sent to the bottom irradiation of fume chamber body.
Still install sealing strip 3c on dome lamp lighting fixture 3a, sealing strip 3c installs in one side that third LED lamp area 3b kept away from dome lamp lighting fixture 3a, sealing strip 3 c's both sides respectively with the inner wall butt of fourth light screen 3a1, the one side that dome lamp lighting fixture 3a was kept away from to sealing strip 3c is the cambered surface, sealing strip 3c uses transparent inert material to make.
The material of sealing strip 3c can be transparent polyethylene, this material makes sealing strip 3c can not influence the outside luminous while in third LED lamp area 3b, can also seal up third LED lamp area 3b inside dome lamp lighting fixture 3a, polyethylene makes sealing strip 3c can not corroded by strong corrosive medicine for inert material, thereby protect third LED lamp area 3b not corroded by the volatile gaseous corrosion of strong corrosive medicine, sealing strip 3c is different medium with the inside air of dome lamp lighting fixture 3a, the light slope that makes third LED lamp area 3b send is jeted into behind sealing strip 3c through the refraction, and refract towards both sides once more when passing sealing strip 3 c's cambered surface edge, thereby third LED lamp area 3 b's irradiation range has been enlarged, make third LED lamp area 3 b's irradiation range wider and light more even.
The power supply system 4 comprises a switch 4a arranged on the side face of the cabinet body and a direct-current power supply arranged inside the cabinet body, the background lamp 1, the front pillar lamp 2, the top lamp 3 and the direct-current power supply are all electrically connected with a manual switch 4a, and the manual switch 4a is further connected with a 220V alternating-current power supply socket through an adapter.
DC power supply can be the lithium cell, and under the normal condition, the socket passes through the adapter and supplies power for manual switch 4a, and manual switch 4a supplies power to background light 1, front pillar lamp 2 and dome lamp 3 respectively, and when the laboratory outage, manual switch 4a passes through the lithium cell power supply to it is not influenced to ensure the illumination of fume chamber body.
The power supply system 4 further comprises an intelligent switch 4b installed on the front pillar lamp 2, the front pillar lamp 2 and the ceiling lamp 3 are both electrically connected with the intelligent switch 4b, and the intelligent switch 4b is further connected with a 220V alternating-current power supply socket through an adapter.
The manual switch 4a and the intelligent switch 4b work independently. When the manual switch 4a is turned on and the infrared receiver cannot receive the signal sent by the infrared transmitter, the background lamp 1, the front pillar lamp 2 and the ceiling lamp 3 all work, and the intelligent switch 4b does not work at this time.
The working principle is as follows:
the first LED lamp strip 1b is a normally bright background lamp, the first LED lamp strip 1b emits light along the direction parallel to the guide plate, light emitted to the two sides of the first LED lamp strip 1b is shielded by the first light shielding plate 1a1, so that the first LED lamp strip 1b cannot directly penetrate the sliding door and cannot directly penetrate the eyes of an experimenter, the light shielded by the first light shielding plate 1a1 of the first LED lamp strip 1b is refracted by the reflecting layers coated inside the guide plate lamp holder 1a and the first light shielding plate 1a1, so that the light is irradiated towards the observation windows and the guide plate on the two sides of the cabinet body, and the guide plate diffusely reflects the light, so that the interior of the cabinet body is always filled with soft light;
the fourth light shielding plate 3a1 restrains the light emitted by the third LED lamp strip 3b to horizontally irradiate towards the guide plate reflective layer 3a2, and the light irradiates on the guide plate reflective layer 3a2 and is reflected downwards by the guide plate reflective layer 3a2, so that the light emitted by the third LED lamp strip 3b irradiates towards the bottom end of the fume hood body;
the second LED lamp strip 2b is fixedly mounted on the front column lamp holder 2a and emits light from the front column of the fume hood body towards the inside of the hood body, and the light emitted by the second LED lamp strip 2b towards the side observation window and the sliding door of the hood body is shielded and reflected by the second light shielding plate 2a1 and the third light shielding plate 2a2, so that the light emitted by the second LED lamp strip 2b can only irradiate the inside of the hood body, and the shortage of the dome lamp 3 is compensated, and meanwhile, no light pollution is generated;
in general, in order to save energy, the sliding door is pulled to the lowest end, so that the infrared receiver can receive a signal sent by the infrared transmitter, the front pillar lamp 2 and the top lamp 3 can be turned off, and only the background lamp 1 is kept normally on; when the sliding door is closed, the intelligent switch 4b is powered off, so that only the background lamp 1 in the cabinet is normally on, and when the sliding door is opened, the intelligent switch 4b is powered on, so that the front pillar lamp 2 and the top lamp 3 work.
In one embodiment of the present invention, the circuit of the power supply system includes a first diode D1, a second diode D2, a first transistor Q1, and a second transistor Q2, wherein an emitter of the first transistor Q1 is connected to a cathode of the second diode D2, a base of the first transistor Q1 is connected to an anode of the second diode D2, two ends of the second diode D2 are sequentially connected in parallel to a seventh resistor R7, a second capacitor C2 and a fourth resistor R4, the collector of the first transistor Q1 is connected to the base of the second transistor Q2, the base of the first transistor Q1 is also connected to the collector of the second transistor Q2, the emitter of the second transistor Q2 is connected to the sixth resistor R6 and the third capacitor C3, the other ends of the sixth resistor R6 and the third capacitor C3 are grounded, the base of the second transistor Q2 is also connected to one ends of the fifth resistor R5, the first capacitor C1 and the third resistor R3, and the other ends of the fifth resistor R5 and the first capacitor C1 are grounded; the anode of the first diode D1 is sequentially connected with a first resistor R1 and a second resistor R2 in series, the other end of the second resistor R2 is grounded, and a first branch is led out from the connection point of the first resistor R1 and the second resistor R2 and is connected with the other end of a third resistor R3; the emitter of the first transistor Q1 is the output terminal. According to the invention, the design of the circuit can timely release the static electricity of the OLED lamp, stabilize the OLED lamp, prevent unstable lamp light from damaging human eyes and prolong the service life of the OLED lamp.
In one embodiment, a fifth light shielding plate 1a1-2 is arranged below the first light shielding plate 1a1, and the first light shielding plate 1a1 and the fifth light shielding plate 1a1-2 are connected through an intermediate mechanism 1a1-3, wherein the intermediate mechanism is a bendable connecting piece; the fifth light shielding plate 1a1-2 is turned upwards by taking the middle mechanism as a turning line; a fastening piece 121 is arranged at the upper end of the first shading plate 1a1, an intermediate belt 122 is arranged on the fastening piece, an insertion piece 123 is arranged at the other end of the intermediate belt 122, a protrusion 125 is arranged on the insertion piece 123, and a safety switch 127 is arranged on the insertion piece; the lower end of the fifth light shielding plate (1a1-2) is provided with a bending part which extends outwards, the bending part is provided with an insertion groove 224, the insertion groove 224 is provided with an insertion notch 226, and the insertion notch 226 is matched with the protrusion 125; a rotating mechanism is arranged on the fastener, and the rotating mechanism enables the middle belt 122 to move; similarly, a sixth light shielding plate, a seventh light shielding plate, and an eighth light shielding plate are respectively provided below the second light shielding plate 2a1, the third light shielding plate 2a2, and the fourth light shielding plate 3a 1.
Accordingly, the structure between the sixth light shielding plate and the second light shielding plate 2a1 can be folded upward, and is substantially the same as the structure between the first light shielding plate and the fifth light shielding plate, and similarly, the structure between the seventh light shielding plate and the third light shielding plate 2a2, and the structure between the eighth light shielding plate and the fourth light shielding plate 3a1 are substantially the same. The rotating mechanism is an electric rotating mechanism, and the electric rotating mechanism is started clockwise to enable the middle belt to contract, so that the fifth light shielding plate is driven to be turned upwards; and starting the electric rotating mechanism anticlockwise to prevent the middle belt from being long, so that the fifth light screen is put down to increase the area of the light screen. The electric rotating mechanism is not particularly limited as long as it can realize the rotation described in the present invention in the prior art.
A fastening piece 121 is arranged at the upper end of the first light shielding plate 1a1, an intermediate belt 122 is arranged on the fastening piece, an insertion piece 123 is arranged at the other end of the intermediate belt 122, the insertion piece 123 can be inserted into the insertion groove 224, a protrusion 125 is arranged on the insertion piece 123, the protrusion 125 can be inserted into the insertion notch 226, and a safety switch 127 is arranged on the insertion piece 123; the projection 125 can be disengaged from the insertion notch 226 only in the open state of the safety switch 127; the degree of turning over of fifth light screen and first light screen can conveniently be controlled to and when rotary mechanism does not work well, the turn over of light screen about can adjusting is turned over with this fastener, thereby guarantees that light can not penetrate people's eyes directly, thereby protects people's eyes.
Through the design of the structure, the shading plate below can be turned upwards and can be fixed. When the shielding area is needed to be large, the lower light shielding plate can be put down; when a larger shading area is not needed, the shading plate below can be turned upwards and fixed. Such structural design can realize on the one hand that the OLED lamp can not penetrate people's eyes directly, and on the other hand, for example, need be close to fume chamber body the inside operation doing the laboratory, when the laboratory staff need stretch into the fume chamber body promptly and operate, then can put the light screen of below down, increase shading area to avoid light to penetrate people's eyes directly.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a laboratory fume chamber LED light which characterized in that: the method comprises the following steps:
the background light (1) is fixed on the guide plate in the fume chamber body, the background light (1) is parallel to the guide plate along the length direction,
the front pillar lamp (2) is vertically arranged and fixedly mounted behind the pillars on two sides of the front end of the fume hood body;
the top lamp (3) is fixedly arranged at the top end of the fume hood body and is positioned between the air supplementing port and the guide plate,
a manual switch (4a) is arranged between the power supply system (4) and each illuminating lamp, and an intelligent switch (4b) is also arranged between each front pillar lamp (2) and each top lamp (3) and the power supply system (4);
each intelligent switch (4b) is connected with a single chip microcomputer (20), and the single chip microcomputer (20) can control the on-off of each intelligent switch (4 b); the single chip microcomputer (20) is also electrically connected with an infrared emitter (23) and an infrared receiver (24) respectively, and the infrared emitter (23) is arranged on two sides of the lower end of a cabinet opening of the fume hood body (50);
a sliding door capable of sliding up and down is arranged at a cabinet opening of the fume hood body, the sliding door and the fume hood body form an experimental area, and infrared receivers (24) are arranged on two sides of the lower end of the sliding door; when the infrared receiver (24) is opposite to the infrared emitter (23), the infrared receiver (24) can receive signals emitted by the infrared emitter (23), the infrared receiver (24) transmits the signals to the single chip microcomputer (20), and meanwhile, the single chip microcomputer (20) receives the signals sent by the infrared receiver (24) and controls the corresponding intelligent switch (4b) to turn off the front pillar lamp (2) and the top lamp (3);
the bottom both sides of sliding door still are provided with laser range finder (30), laser range finder (30) are connected with singlechip (20) electricity, laser range finder (30) are used for detecting the distance of sliding door bottom and fume cupboard body operation mesa, slide down or upwards slide when the sliding door, then laser range finder (30) will measure in real time sliding door bottom and fume cupboard body operation mesa's distance send to singlechip (20), singlechip (20) analysis judges the sliding door down slide or upwards slide.
2. The laboratory fume hood LED illuminating lamp according to claim 1, characterized in that when the single chip microcomputer (20) receives a signal of the laser range finder (30) and analyzes that the sliding door slides downwards, and when the single chip microcomputer (20) receives a signal sent by the infrared receiver (24), the single chip microcomputer (20) controls the intelligent switch (4b) to turn off the front pillar lamp (2) and the dome lamp (3); when the single chip microcomputer (20) receives a signal of the laser range finder (30) and analyzes that the sliding door slides upwards, and the single chip microcomputer (20) does not receive a signal sent by the infrared receiver (24), the single chip microcomputer (20) controls the intelligent switch (4b) to turn on the front pillar lamp (2) and the top lamp (3).
3. The laboratory fume hood LED lighting lamp according to claim 1, characterized in that: the backlight (1) is including guide plate lighting fixture (1a) and install first LED lamp area (1b) in guide plate lighting fixture (1a) inside, guide plate lighting fixture (1a) encircles the vertical position setting of guide plate and forms a square frame, install inside each limit of this square frame first LED lamp area (1b), guide plate lighting fixture (1a) is provided with first light screen (1a1) of inside extension for the both sides of first LED lamp area (1b), first light screen (1a1) shelter from first LED lamp area (1b) and make the light that it sent can not direct the sliding door of fume chamber, the inner wall of guide plate lighting fixture (1a) and first light screen (1a1) scribbles reflecting material.
4. The laboratory fume hood LED lighting lamp according to claim 3, characterized in that: the first LED lamp strip (1b) comprises LED lamps (1b1) and a circuit board (1b2), a plurality of LED lamps (1b1) are arranged in a row and mounted on the circuit board (1b2), each LED lamp (1b1) is fixedly provided with a triangular folding block (1b3), the circuit board (1b2) is electrically connected with a power supply system (4), the triangular folding block (1b3) is a transparent triangular block, projections of the triangular folding block (1b3) in the directions of two sides of the circuit board (1b2) are isosceles triangles, and long sides of the isosceles triangles are attached to the surface of the LED lamps (1b 1).
5. The laboratory fume hood LED lighting lamp according to claim 4, characterized in that: the front pillar lamp (2) comprises a front pillar lamp holder (2a) and a second LED lamp strip (2b) arranged inside the front pillar lamp holder (2a), the second LED lamp strip (2b) and the first LED lamp strip (1b) are of the same structure, the front pillar lamp holder (2a) is attached to the inner side of a front pillar of the fume hood, the front pillar lamp holder (2a) extends from the front pillar of the fume hood body to a height flush with the top end of the guide plate lamp holder (1a) from bottom to top, the projection of the front pillar lamp holder (2a) in the vertical direction is a right triangle, two right-angled sides of the right triangle are respectively abutted against the inner wall of the front pillar of the fume hood body, a second light screen (2a1) and a third light screen (2a2) are arranged on two sides of the front pillar lamp holder (2a), the second light screen (2a1) is parallel to the sliding door of the fume hood and extends towards the front pillar lamp holder (2a) on the other side, and the third light screen (2a2) is perpendicular to the sliding door of the, the second light shielding plate (2a1) and the third light shielding plate (2a2) are coated with light reflecting materials.
6. The laboratory fume hood LED lighting lamp according to claim 5, characterized in that: dome lamp (3) including many parallel arrangement's dome lamp lighting fixture (3a) and install third LED lamp area (3b) at dome lamp lighting fixture (3a) inside, third LED lamp area (3b) are the looks isostructure with first LED lamp area (1b), dome lamp lighting fixture (3a) are the rectangular shape that is on a parallel with fume chamber body roof, be provided with fourth light screen (3a1) that the level extends towards the guide plate around dome lamp lighting fixture (3a), the inner wall of dome lamp lighting fixture (3a) and fourth light screen (3a1) all scribbles reflecting material, dome lamp lighting fixture (3a) are still including installing guide plate reflector layer (3a2) on guide plate top slope position, the laminating of guide plate reflector layer (3a2) is at the slope position on guide plate top.
7. The laboratory fume hood LED lighting lamp according to one of claims 1 to 6, wherein: the circuit of the power supply system comprises a first diode D1, a second diode D2, a first transistor Q1 and a second transistor Q2, wherein the emitter of the first transistor Q1 is connected with the cathode of a second diode D2, the base of the first transistor Q1 is connected with the anode of a second diode D2, two ends of the second diode D2 are sequentially connected with a seventh resistor R7, a second capacitor C2 and a fourth resistor R4 in parallel, the collector of the first transistor Q1 is connected with the base of a second transistor Q2, the base of the first transistor Q1 is also connected with the collector of a second transistor Q2, the emitter of the second transistor Q2 is connected with a sixth resistor R6 and a third capacitor C3, the other ends of the sixth resistor R3 and the third capacitor C3 are grounded, the base of the second transistor Q3 is also connected with a fifth resistor R3, a first capacitor C3 and one end of the first resistor R3 are grounded; the anode of the first diode D1 is sequentially connected with a first resistor R1 and a second resistor R2 in series, the other end of the second resistor R2 is grounded, and a first branch is led out from the connection point of the first resistor R1 and the second resistor R2 and is connected with the other end of a third resistor R3; the emitter of the first transistor Q1 is the output terminal.
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| CN111336422B (en) * | 2020-02-28 | 2022-07-05 | 南通大学 | LED shadowless lamp light supplementing device and light supplementing method thereof |
| CN111396778B (en) * | 2020-03-18 | 2022-02-15 | 中冶置业集团有限公司 | Intelligent lighting mechanism, system and structure |
| CN111356272B (en) * | 2020-03-18 | 2022-03-11 | 清华大学 | Indoor intelligent device system |
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| CN207914295U (en) * | 2017-12-18 | 2018-09-28 | 郑州需求侧能源管理有限公司 | A kind of laboratory energy efficient lighting system |
| CN209262810U (en) * | 2019-01-24 | 2019-08-16 | 深圳市博大建设集团有限公司 | Hidden Decorative lamp belt mounting structure |
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| DE102011114993A1 (en) * | 2011-10-06 | 2013-04-11 | Thermo Electron Led Gmbh | Fume hood and especially safety workbench with LED lighting |
| CN205944780U (en) * | 2016-08-18 | 2017-02-08 | 联测电力科技有限公司 | Fixed low -voltage switchgear |
| CN207914296U (en) * | 2017-12-18 | 2018-09-28 | 郑州需求侧能源管理有限公司 | A kind of energy saving laboratory fume hood with reflectoscope |
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