CN112943070B

CN112943070B - Energy-saving sun-shading system

Info

Publication number: CN112943070B
Application number: CN202110128495.6A
Authority: CN
Inventors: 崔宇浩; 易修强
Original assignee: Suzhou Weier Yangguang Intelligent Technology Co ltd
Current assignee: Suzhou Weier Yangguang Intelligent Technology Co ltd
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2022-12-16
Anticipated expiration: 2039-04-28
Also published as: CN112832655B; CN112832655A; CN112943070A; CN110005328A; CN110005328B

Abstract

The invention discloses an energy-saving sun-shading system based on a new energy membrane material, which comprises a constant voltage source module, a sun-shading window module, a switch module, a processor module and a sensing module, wherein a bus voltage end of the constant voltage source module provides stable bus voltage for the sun-shading window module; the sunshade window module comprises a plurality of sunshade window modules, and each sunshade window module comprises a curled electrostatic film and a conductive layer; the switch module comprises a plurality of electronic switches which correspond to the sunshade window modules one by one, each sunshade window module is connected with the electronic switches in series to form a first branch, and each first branch is connected in parallel; the sensing module comprises one or more sensors, and the processor module controls the electronic switch to be switched on or switched off according to the detection result of the sensors. The energy-saving sun-shading system disclosed by the invention utilizes the sensing module to automatically control the opening or closing of the sun-shading window, automatically expands the sun-shading window under the condition that the sun-shading is required, and automatically retracts the sun-shading window under the condition that the sun-shading is not required, so that the energy consumption is saved.

Description

Energy-saving sun-shading system

RELATED APPLICATIONS

The invention relates to divisional application with application number 201910347510.9, application date of 2019, 28.04.9 and the name of 'a sensing automatic control type modular sun-shading system'.

Technical Field

The invention relates to the field of sun-shading control of sun-shading windows, in particular to an energy-saving sun-shading system.

Background

In the existing sun-shading technology, a stepping motor is mostly used for driving sun-shading cloth to shade sun. Referring to the chinese patent application No. 201811516134.3, the full shading running mechanism and the full shading driving mechanism are designed to drive the full shading roller to rotate forward and backward, so as to fold and put down the full shading cloth curtain.

The prior art shading system has the following disadvantages: the service life is short, the mounting structure is complicated, the sun-shading effect is not good, the sun-shading direction is not controllable, and the like, and the sun-shading mechanism can not automatically realize sun shading according to the actual application environment.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides an energy-saving sun-shading system which can eliminate static accumulation and optimize the sun-shading effect, and the technical scheme is as follows:

the invention provides an energy-saving sun-shading system which comprises a constant voltage source module, a sun-shading window module, a switch module, a processor module and a sensing module, wherein a bus voltage end of the constant voltage source module provides stable bus voltage for the sun-shading window module;

the sunshade window module comprises a curled electrostatic film and a conductive layer, and the conductive layer is arranged opposite to the electrostatic film in an unfolded state;

the input end of the switch module is connected with the processor module, the output end of the switch module is connected with the sunshade window module, and the processor module controls the sunshade window module by controlling the switch module;

the energy-saving sun-shading system further comprises an H-bridge control module and a constant current module, wherein the H-bridge control module is provided with a first output end and a second output end, the first output end is connected with a first port of the constant current module, a second port of the constant current module is connected with one of the electrostatic film and the conductive layer, the other of the electrostatic film and the conductive layer is connected with the switch module, and the second output end is connected with the switch module;

the H-bridge control module is connected with the processor module, and under the control of the processor module, the first output end and the second output end of the H-bridge control module are subjected to voltage alternating switching.

Further, the H-bridge control module includes a first MOS transistor, a second MOS transistor, a third MOS transistor, and a fourth MOS transistor, where the first MOS transistor and the second MOS transistor are disposed on a second branch between the bus voltage terminal and the ground terminal, the third MOS transistor and the fourth MOS transistor are disposed on a third branch between the bus voltage terminal and the ground terminal, the first output terminal is disposed between the first MOS transistor and the second MOS transistor, and the second output terminal is disposed between the third MOS transistor and the fourth MOS transistor;

the grid electrode of the first MOS tube, the grid electrode of the second MOS tube, the grid electrode of the third MOS tube and the grid electrode of the fourth MOS tube are respectively connected with the processor module, the processor module controls the first MOS tube and the fourth MOS tube to be conducted and the second MOS tube and the third MOS tube to be closed, or the processor module controls the second MOS tube and the third MOS tube to be conducted and the first MOS tube and the fourth MOS tube to be closed.

Further, the constant current module comprises a fifth MOS transistor, a sixth MOS transistor, a first resistor, a second resistor, a first triode, a second triode, a third triode, a fourth triode, a first operational amplifier and a second operational amplifier, wherein the first resistor and the second resistor are connected in series to form a fourth branch circuit, a middle connection point of the first resistor and the second resistor is connected with a reference ground, a drain electrode of the fifth MOS transistor is connected with the first port, a source electrode of the fifth MOS transistor is connected with one end of the fourth branch circuit, the other end of the fourth branch circuit is connected with a source electrode of the sixth MOS transistor, and a drain electrode of the sixth MOS transistor is connected with the second port;

the voltage sampling point between the fifth MOS tube and the first resistor is connected with the inverting input end of the first operational amplifier, the voltage sampling point between the sixth MOS tube and the second resistor is connected with the inverting input end of the second operational amplifier, the positive phase input ends of the first operational amplifier and the second operational amplifier are both connected with reference voltage, the output end of the first operational amplifier is respectively connected with the base electrodes of the first triode and the second triode, the output end of the second operational amplifier is respectively connected with the base electrodes of the third triode and the fourth triode, the emitting electrode of the first triode and the emitting electrode of the second triode are both connected with the grid electrode of the fifth MOS tube, and the emitting electrode of the third triode and the emitting electrode of the fourth triode are both connected with the grid electrode of the sixth MOS tube.

Furthermore, the energy-saving sunshade system comprises a plurality of sunshade window modules, the switch module comprises a plurality of electronic switches, the electronic switches correspond to the sunshade window modules one by one, each sunshade window module is connected with the electronic switches in series to form a first branch, and the first branches are connected in parallel.

Furthermore, the sensing module comprises one or more sensors, the sensors are connected with the input end of the processor module, the control end of the electronic switch is connected with the output end of the processor module, and the processor module controls the electronic switch to be switched on or switched off according to the detection result of the sensors.

Further, the constant-voltage source module comprises a power supply, a boost chip and a boost circuit, the power supply is a photovoltaic power supply or a storage battery, the boost circuit comprises a transformer, a seventh MOS transistor, a third resistor, a fourth resistor and a fifth resistor, a primary coil of the transformer is respectively connected with the power supply and a source electrode of the seventh MOS transistor, a drain electrode of the seventh MOS transistor is grounded through the fifth resistor, and a gate electrode of the seventh MOS transistor is connected with the boost chip;

the third resistor and the fourth resistor are connected in series to form a fifth branch circuit, a secondary coil of the transformer is connected with a bus voltage end and one end of the fifth branch circuit respectively, the other end of the fifth branch circuit is grounded, a feedback end is arranged between the third resistor and the fourth resistor, and the feedback end is connected with a feedback pin of the boosting chip.

Furthermore, the energy-saving sun-shading system further comprises a voltage adjusting module, the voltage adjusting module comprises a third operational amplifier and a sixth resistor, the positive phase input end of the third operational amplifier is connected with the single chip microcomputer pin of the processor module, the output end of the third operational amplifier is respectively connected with the negative phase input end of the third operational amplifier and one end of the sixth resistor, and the other end of the sixth resistor is respectively connected with the given voltage end and the feedback pin of the boosting chip of the constant voltage source module.

Furthermore, the energy-saving sun-shading system further comprises a human-computer interaction module, the human-computer interaction module is connected with the input end of the processor module, and the processor module controls the switch module according to an input instruction of the human-computer interaction module.

Furthermore, the energy-saving sun-shading system further comprises a human-computer interaction module, the human-computer interaction module is connected with the input end of the processor module, and the processor module controls the corresponding electronic switch to be switched on or switched off according to an input instruction of the human-computer interaction module.

Furthermore, the energy-saving sun-shading system also comprises a pyroelectric infrared sensor arranged indoors, the pyroelectric infrared sensor is used for detecting the change of the infrared spectrum of the human body, and the pyroelectric infrared sensor is connected with the input end of the processor module;

the processor module switches a sensing control mode or a human-computer interaction control mode according to a detection result of the pyroelectric infrared sensor, when the pyroelectric infrared sensor detects that no person is in a room, the processor module controls the on-off of the electronic switch according to the detection result of the sensor, otherwise, the processor module controls the on-off of the electronic switch according to an input instruction of the human-computer interaction module.

The technical scheme provided by the invention has the following beneficial effects:

a. the static accumulation of the sunshade window can be reduced, so that the sunshade window keeps sensitive;

b. the opening or closing of the sun-shading window can be automatically controlled according to the sensing signal along with the sunlight angle;

c. the opening or closing of a certain sunshade window can be controlled by using a human-computer interface at will along with the sunlight angle;

d. the sun-shading window is opened to reduce external radiation;

e. the sunshade window is automatically unfolded under the condition that the sunshade is needed, and the sunshade window is automatically folded under the condition that the sunshade is not needed, so that the energy consumption is saved;

f. the sensing automatic control mode is automatically switched under the condition that no person is in the room, and the man-machine interaction control mode is switched under the condition that a person is in the room;

g. the sensing automatic control mode and the man-machine interaction control mode can be freely switched.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a block diagram of an energy-saving sunshade system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a circuit connection between a sunshade window module and a switch module in the energy-saving sunshade system according to the embodiment of the present invention;

FIG. 3 is a circuit diagram of a constant voltage source module in the energy-saving sun-shading system according to the embodiment of the present invention;

FIG. 4 is a circuit diagram of an H-bridge control module in the energy-saving sunshade system according to the embodiment of the present invention;

FIG. 5 is a circuit diagram of a constant current module in the energy-saving sun-shading system according to the embodiment of the present invention;

FIG. 6 is a circuit diagram of a voltage regulation module in the energy-saving sunshade system according to the embodiment of the present invention;

FIG. 7 is a schematic diagram of a pin structure of a single chip microcomputer of a processor module in the energy-saving sunshade system provided by the embodiment of the invention;

FIG. 8 is a schematic structural view of an electrostatic film of the prior art;

FIG. 9 is a schematic structural view of a sunshade window of the energy-saving sunshade system provided by the embodiment of the invention.

Wherein the reference numerals include: 1-constant voltage source module, 11-boost chip, 12-transformer, 13-diode, 14-seventh MOS tube, 15-fifth resistor, 16-third resistor, 17-fourth resistor, 18-capacitor, 2-constant current module, 211-fifth MOS tube, 212-sixth MOS tube, 221-first resistor, 222-second resistor, 231-first triode, 232-second triode, 233-third triode, 234-fourth triode, 241-first operational amplifier, 242-second operational amplifier, 25-ground reference, 26-first port, 27-second port, 3-processor module, 31-single chip, 4-H bridge control module, 41-first MOS tube, 42-second MOS tube, 43-third MOS tube, 44-fourth MOS tube, 46-first output end, 47-second output end, 5-voltage regulation module, 51-third operational amplifier, 52-sixth resistor, 53-given voltage, 6-7-fourth MOS tube, 7-transparent conductive layer, 82-transparent conductive layer, 85-transparent conductive layer, and transparent conductive layer.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

In the prior art, a chinese patent with application number 201610624009.9 discloses an electrostatic film synthesized by a new material, as shown in fig. 8, which mainly comprises an elastic curled conductive film 81, a dielectric layer 82, and a transparent conductive layer 83, wherein the transparent conductive layer 83 is attached to a glass layer 84, and the working principle thereof is as follows: when the power source 85 is connected, positive and negative electrons are respectively charged on the elastic curled conductive film 81 and the transparent conductive layer 83, so that the elastic curled conductive film 81 overcomes the self curling force to unfold (unfold leftward in fig. 8) under the action of electrostatic force, and the unfolded conductive film 81 and the transparent conductive layer 83 are oppositely arranged and equivalently become a capacitor.

The electrostatic film in the embodiment of the present invention is identical to the elastic curled conductive film 81 in the patent mentioned in the background art in structure and working principle, i.e. it is unfolded to form the sunshade curtain by overcoming the self-curling force through the electrostatic attraction.

In an embodiment of the present invention, an energy-saving sunshade system is provided, as shown in fig. 1, the sunshade system includes a constant voltage source module 1, a sunshade window module, a switch module, a processor module 3, and a sensing module 6, a bus voltage end of the constant voltage source module 1 provides a stable bus voltage to the sunshade window module;

the sunshade window module comprises a plurality of sunshade window modules 8, the sunshade window modules are arranged on the inner side of the same glass (as shown in fig. 9) or the inner sides of different glasses (not shown), each sunshade window module 8 comprises a curled electrostatic film and a conductive layer, and the conductive layer is arranged opposite to the electrostatic film in an unfolded state; the electrostatic film having a curl as referred to herein is a film which is curled in a natural state, and after being energized, the electrostatic film becomes a flat state against its own curling force by the principle of attraction between opposite polarities due to charges having different electric charges from those of the conductive layer, and the electrostatic film has a dark color and the conductive film is transparent and colorless.

The switch module comprises a plurality of electronic switches 7, the electronic switches 7 correspond to the sunshade window modules 8 one by one, each sunshade window module 8 is connected with the electronic switches 7 in series to form a first branch circuit, and each first branch circuit is connected in parallel;

the sensing module 6 comprises one or more sensors, as shown in fig. 1, the sensing module 6 is connected with an input end of the processor module 3, a control end of the electronic switch 7 is connected with an output end of the processor module 3, and the processor module 3 controls the electronic switch 7 to be switched on or switched off according to a detection result of the sensor.

Optionally, the sensor is a temperature sensor and/or a light sensor arranged outdoors, and the temperature sensor includes an outdoor temperature sensor for detecting outdoor temperature and/or an indoor temperature sensor for detecting indoor temperature; the processor module 3 controls the on-off of the electronic switch according to the detection result of the outdoor temperature sensor and/or the indoor temperature sensor and/or the optical sensor. Optionally, the synchronous action of the electronic switches is controlled uniformly.

In an embodiment of the present invention, the sensing module 6 includes an indoor sensor, and if the indoor sensor detects that the indoor temperature is greater than a preset first temperature threshold (for example, 23 ℃ which is a temperature value that a human body feels comfortable), the electronic switch 7 is controlled to be closed, so that the sunshade window module 8 is unfolded.

In one embodiment of the present invention, the sensing module 6 includes an outdoor sensor, and if the outdoor sensor detects that the outdoor temperature is greater than a preset second temperature threshold (for example, 30 ℃ of a heat), the electronic switch 7 is controlled to be closed so as to unfold the sunshade window module 8.

In an embodiment of the present invention, the sensing module 6 is a light sensor, and if the light sensor detects that the illuminance of outdoor light is greater than a preset first illuminance threshold, the electronic switch 7 is controlled to be closed so as to unfold the sunshade window module 8.

In an embodiment of the present invention, the sensing module 6 includes an indoor sensor and an outdoor sensor, and if the outdoor temperature is detected to be higher than the indoor temperature by a preset third temperature threshold (for example, 10 ℃), the electronic switch 7 is controlled to be closed so as to unfold the sunshade window module 8.

In a preferred embodiment of the present invention, the sensing module 6 includes an indoor sensor, an outdoor sensor and an outdoor light sensor, and the control strategy is as follows: on the premise that the indoor temperature is lower than a first temperature threshold (for example, a temperature value 23 ℃ that a human body feels comfortable), if the indoor temperature is higher than the outdoor temperature and the light sensor detects that the luminosity information is lower than a preset luminosity threshold (indicating cloudy days), the electronic switch 7 is controlled to be closed to enable the sunshade window module 8 to be unfolded (slowing down the process of indoor heat diffusing to the outdoor), otherwise, the electronic switch 7 is controlled to be opened; on the contrary, on the premise that the indoor temperature is higher than the first temperature threshold (for example, the temperature value 23 ℃ that the human body feels comfortable), if the indoor temperature is higher than the outdoor temperature and the light sensor detects that the luminosity information is lower than the preset luminosity threshold (indicating a cloudy day), the electronic switch 7 is controlled to be turned off so that the sunshade window module 8 is retracted (the process of diffusing indoor heat to the outdoor is accelerated), otherwise, the electronic switch 7 is controlled to be turned on.

In a preferred embodiment of the present invention, the sun-shading system further includes a human-computer interaction module in addition to the sensing module, the human-computer interaction module is connected to the input end of the processor module 3, the human-computer interaction module at least includes mechanical buttons or touch-screen buttons or electronic input buttons with the same number as the electronic switches 7, and the processor module 3 controls the corresponding electronic switches 7 to be turned on or off according to the input instruction of the human-computer interaction module. Optionally, the human-computer interaction module is a mechanical button, a touch screen or an electronic input device, and a market mature scheme is applied to the human-computer interface, but the scheme of the LCD touch screen may be a key scheme, and user information is fed back to the single chip 31 of the module processor module 3 through communication modes such as a serial port, so as to perform instruction execution control.

The sensing control mode based on the sensing module 6 and the human-computer interaction control mode based on the human-computer interaction module can coexist, and can also be automatically controlled according to whether a person is in a room, for example, a pyroelectric infrared sensor is arranged in the room and used for detecting whether the person is in the room, and the pyroelectric infrared sensor is connected with the input end of the processor module 3; if the pyroelectric infrared sensor detects that no person is in the room, the current mode is automatically switched to a sensing control mode, namely the processor module 3 controls the on-off of the electronic switch 7 according to the detection result of the sensor, and if the pyroelectric infrared sensor detects that a person is in the room, the processor module 3 controls the on-off of the electronic switch 7 according to the input instruction of the man-machine interaction module.

Still alternatively, a mode control switch may be employed instead of the pyroelectric infrared sensor, the mode control switch being used to switch the sensing control mode or the human-computer interaction control mode. If the sensing module is in the man-machine interaction control mode, the power supply of the sensing module can be cut off; if the device is in the sensing control mode, the power supply of the man-machine interaction module can be cut off.

As shown in fig. 3, the constant voltage source module 1 includes a power supply, a boost chip 11 and a boost circuit, the power supply is a photovoltaic power supply or a storage battery, the boost circuit includes a transformer 12, a seventh MOS transistor 14, a third resistor 16, a fourth resistor 17 and a fifth resistor 15, a primary coil of the transformer 12 is connected to the power supply and a source of the seventh MOS transistor 14, respectively, a drain of the seventh MOS transistor 14 is grounded through the fifth resistor 15, and a gate of the seventh MOS transistor 14 is connected to the boost chip 11, in a preferred embodiment of the present invention, the boost chip 11 employs an LT3751 chip for controlling an operating state of the boost circuit;

the third resistor 16 and the fourth resistor 17 are connected in series to form a fifth branch, a secondary coil of the transformer 12 is connected with a bus voltage end and one end of the fifth branch respectively, the other end of the fifth branch is grounded, a feedback end is arranged between the third resistor 16 and the fourth resistor 17, and the feedback end is connected with a feedback pin of the boost chip 11. The third resistor 16, the fourth resistor 17 and the fifth resistor 15 are sampling resistors, wherein the sampling voltage of the fifth resistor 15 is fed back to the boost chip 11; and a connection point Feedback between the third resistor 16 and the fourth resistor 17 is connected to a Feedback pin on the boost chip 11 to form Feedback control, so that the bus voltage end outputs a constant voltage value.

In a preferred embodiment of the present invention, the boost circuit further includes a diode 13 and a capacitor 18, the diode 13 is disposed between the secondary winding and the bus voltage terminal, and the conduction direction of the diode 13 is from the secondary winding to the bus voltage terminal; two ends of the capacitor 18 are connected in parallel to two ends of the fifth branch. The bus voltage terminal (Vbus in the figure) keeps outputting a constant voltage after voltage regulation is finished.

As shown in fig. 4, the H-bridge control module 4 includes a first MOS transistor 41, a second MOS transistor 42, a third MOS transistor 43, and a fourth MOS transistor 44, where the first MOS transistor 41 and the second MOS transistor 42 are disposed in a second branch between the bus voltage terminal and the ground terminal, the third MOS transistor 43 and the fourth MOS transistor 44 are disposed in a third branch between the bus voltage terminal and the ground terminal, the first output terminal 46 is disposed between the first MOS transistor 41 and the second MOS transistor 42, and the second output terminal 47 is disposed between the third MOS transistor 43 and the fourth MOS transistor 44;

the gate of the first MOS transistor 41, the gate of the second MOS transistor 42, the gate of the third MOS transistor 43, and the gate of the fourth MOS transistor 44 are respectively connected to the processor module 3, the processor module 3 controls the first MOS transistor 41 and the fourth MOS transistor 44 to be turned on and the second MOS transistor 42 and the third MOS transistor 43 to be turned off, or the processor module 3 controls the second MOS transistor 42 and the third MOS transistor 43 to be turned on and the first MOS transistor 41 and the fourth MOS transistor 44 to be turned off.

As can be seen from fig. 4, the drain of the first MOS transistor 41 is connected to the bus voltage terminal, the source of the first MOS transistor 41 is connected to the drain of the second MOS transistor 42, and the source of the second MOS transistor 42 is connected to the ground terminal; the drain of the third MOS transistor 43 is connected to the bus voltage terminal, the source of the third MOS transistor 43 is connected to the drain of the fourth MOS transistor 44, and the source of the fourth MOS transistor 44 is connected to the ground terminal. The Vbus terminal in fig. 4 is connected to the Vbus terminal in fig. 3.

The working mode of the H-bridge control module 4 is as follows:

the gates of the four MOS transistors are respectively connected to the corresponding MOS transistor driver chips, the first gate of the first MOS transistor 41 is connected to the first MOS transistor driver chip, and so on, when the single chip 31 outputs a high level only to the first MOS transistor driver chip and the fourth MOS transistor driver chip, the first MOS transistor 41 and the fourth MOS transistor 44 are turned on, and the second MOS transistor 42 and the third MOS transistor 43 are turned off without obtaining a gate voltage, in this case, the first output end 46 outputs a positive voltage, the second output end 47 is grounded, and at this time, the constant voltage source module 1 provides a forward voltage to the electrostatic film;

when the single chip 31 only outputs a high level to the second MOS transistor driver chip and the third MOS transistor driver chip, the second MOS transistor 42 and the third MOS transistor 43 are turned on, and the first MOS transistor 41 and the fourth MOS transistor 44 are turned off without obtaining a gate voltage, in this case, the second output terminal 47 outputs a positive voltage, the first output terminal 46 is grounded, and at this time, the constant voltage source module 1 provides a forward voltage to the conductive layer (indirectly through the corresponding electronic switch 7).

The processor module 3 controls the H-bridge control module 2 to perform voltage alternating switching once at intervals of time T, so that the static accumulation of the static film and the surface of the dielectric layer can be reduced greatly to ensure the stable operation of the film, and preferably, the processor module 3 comprises a single chip microcomputer and an MOS tube driving chip.

As shown in fig. 5, the constant current module 2 includes a fifth MOS transistor 211, a sixth MOS transistor 212, a first resistor 221, a second resistor 222, a first transistor 231, a second transistor 232, a third transistor 233, a fourth transistor 234, a first operational amplifier 241, and a second operational amplifier 242, where the first resistor 221 and the second resistor 222 are connected in series to form a fourth branch, a connection point between the first resistor 221 and the second resistor 222 is connected to a reference ground 25, a drain of the fifth MOS transistor 211 is connected to the first port 26, a source of the fifth MOS transistor 211 is connected to one end of the fourth branch, another end of the fourth branch is connected to a source of the sixth MOS transistor 212, and a drain of the sixth MOS transistor 212 is connected to the second port 27;

a voltage sampling point between the fifth MOS transistor 211 and the first resistor 221 is connected to an inverting input terminal of the first operational amplifier 241, a voltage sampling point between the sixth MOS transistor 212 and the second resistor 222 is connected to an inverting input terminal of the second operational amplifier 242, non-inverting input terminals of the first operational amplifier 241 and the second operational amplifier 242 are both connected to a reference voltage, an output terminal of the first operational amplifier 241 is respectively connected to bases of the first transistor 231 and the second transistor 232, an output terminal of the second operational amplifier 242 is respectively connected to bases of the third transistor 233 and the fourth transistor 234, an emitter of the first transistor 231 and an emitter of the second transistor 232 are both connected to a gate of the fifth MOS transistor 211, and an emitter of the third transistor 233 and an emitter of the fourth transistor 234 are both connected to a gate of the sixth MOS transistor 212.

As can be seen from the figure, the first transistor 231 is an NPN transistor, and the collector of the first transistor 231 is connected to a positive voltage (Vp); the second triode 232 is a PNP triode, and the collector of the second triode 232 is connected to a negative voltage (Vn); the third triode 233 is an NPN triode, and a collector of the third triode 233 is connected to a positive voltage (Vp); the fourth transistor 234 is a PNP transistor, and a negative voltage (Vn) is connected to a collector of the fourth transistor 234. Preferably, the first operational amplifier 241 and the second operational amplifier 242 are dual-power operational amplifiers, that is, as shown in fig. 5, 8 pins of the first operational amplifier 241 and the second operational amplifier 242 are both connected to the Vp positive voltage, and 4 pins of the first operational amplifier 241 and the second operational amplifier 242 are both connected to the Vn negative voltage.

The working principle of the constant current module 2 is as follows:

the function of the reference ground 25 is different from that of a common ground, and the function of the reference ground is to provide reference voltages for a first voltage sampling point between the fifth MOS transistor 211 and the first resistor 221 and a second voltage sampling point between the sixth MOS transistor 212 and the second resistor 222, and on the basis of the reference voltages, a first sampling voltage obtained by the first voltage sampling point is compared with a reference voltage at the non-inverting input end of the first operational amplifier 241. When the first output end 46 of the H-bridge control module 4 outputs a positive voltage, at this time, the first operational amplifier 241 controls the opening of the fifth MOS transistor 211, and the sixth MOS transistor 212 is turned on (the second operational amplifier 242 does not play a role in regulation), if the first sampling voltage is greater than the reference voltage Vref, which indicates that the current flowing through the first resistor 221 (the second port 27) is greater, the output end of the first operational amplifier 241 controls the gate voltage of the fifth MOS transistor 211 to be smaller through the first transistor 231 and the second transistor 232, and the opening of the fifth MOS transistor 211 is smaller, so that the sampling voltage at one end of the first resistor 221 (left side in fig. 5) is reduced; on the contrary, if the sampling voltage is smaller, the opening degree of the fifth MOS transistor 211 is adjusted to be larger, so that the sampling voltage at one end of the first resistor 221 is increased, that is, the output current of the second port 27 is adjusted to be stabilized in a constant current range in each sampling. When the second output end 47 of the H-bridge control module 4 outputs a positive voltage, the second sampled voltage obtained at the second voltage sampling point is compared with the reference voltage at the non-inverting input end of the second operational amplifier 242, at this time, the second operational amplifier 242 controls the opening degree of the sixth MOS transistor 212, and the fifth MOS transistor 211 is turned on (the first operational amplifier 241 does not perform a regulation function), if the second sampled voltage is larger than the reference voltage Vref, which indicates that the current flowing through the second resistor 222 (the first port 26) is larger, the output end of the second operational amplifier 242 controls the gate voltage of the sixth MOS transistor 212 to be smaller through the third triode 233 and the fourth triode 234, and the opening degree of the sixth MOS transistor 212 is reduced, so that the sampled voltage at one end of the second resistor 222 (the right side in fig. 5) is reduced; on the contrary, if the second sampling voltage is smaller, the opening degree of the sixth MOS transistor 212 is adjusted to be larger, so that the sampling voltage at one end of the second resistor 222 is increased, that is, the output current of the first port 26 is adjusted to be stabilized in a constant current range in each sampling.

In a preferred embodiment of the present invention, the sun shading system further includes a voltage adjusting module 5, referring to fig. 6, the voltage adjusting module 5 includes a third operational amplifier 51 and a sixth resistor 52, a non-inverting input terminal of the third operational amplifier 51 is connected to the pin of the single chip 31 of the processor module 3, an output terminal of the third operational amplifier 51 is respectively connected to an inverting input terminal of the third operational amplifier 51 and one end of the sixth resistor 52, and the other end of the sixth resistor 52 is respectively connected to the given voltage terminal 53 and the feedback pin of the boost chip 11 of the constant voltage source module 1.

The voltage regulation module 5 here functions as: the high voltage Vbus output by the constant voltage source module 1, which is a fixed value, needs to change the desired voltage value according to the size of the load and other use situations, and the voltage regulating module 5 plays this role, and its implementation principle is as follows: the Vbus sum can be calculated by the following formula:

Vbus＝Vfb(1+Rs1/Rs2)+Rs1/Rs3(Vfb-Vsp)，

wherein Vfb is the given voltage value of the given voltage terminal 53 (the given voltage terminal 53 is connected to the midpoint of the resistors Rs1 and Rs2 in fig. 3), for example, 1.22v, rs1, rs2, and rs3 can be respectively the resistance values of the third resistor 16, the fourth resistor 17, and the sixth resistor 52, and Vsp can be controlled by the single-chip microcomputer 31, so that Vbus and Vsp form a certain functional relationship, and the desired Vbus value can be obtained by changing the value of Vsp.

Finally, the following explanation is made for the pin of the single chip 31 of the processor module 3:

referring to fig. 7, the startup is connected to the U2 pin of the boost chip 11 in fig. 3, the Vsp pin is connected to the 3 pin of the third operational amplifier 51 in fig. 6, the S1 pin is connected to the 1 pin of the first MOS transistor 41 in fig. 4, the S2 pin is connected to the 1 pin of the second MOS transistor 42 in fig. 4, the S3 pin is connected to the 1 pin of the third MOS transistor 43 in fig. 4, the S4 pin is connected to the 1 pin of the fourth MOS transistor 44 in fig. 4, and the AD pin is connected to a connection point of the resistors R1 and R2 in fig. 3.

The energy-saving sun-shading system disclosed by the invention utilizes the sensing module to automatically control the opening or closing of the sun-shading window, automatically expands the sun-shading window under the condition that the sun-shading is required, and automatically retracts the sun-shading window under the condition that the sun-shading is not required, so that the energy consumption is saved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An energy-saving sun-shading system is characterized by comprising a constant-voltage source module (1), a sun-shading window module (8), a switch module, a processor module (3) and a sensing module (6), wherein a bus voltage end of the constant-voltage source module (1) provides stable bus voltage for the sun-shading window module;

the sunshade window module (8) comprises a curled electrostatic film and a conductive layer, and the conductive layer is arranged opposite to the electrostatic film in an unfolded state;

the input end of the switch module is connected with the processor module (3), the output end of the switch module is connected with the sunshade window module, and the processor module (3) controls the sunshade window module (8) by controlling the switch module;

the energy-saving sun-shading system further comprises an H-bridge control module (4) and a constant current module (2), wherein the H-bridge control module (4) is provided with a first output end (46) and a second output end (47), the first output end (46) is connected with a first port (26) of the constant current module (2), a second port (27) of the constant current module (2) is connected with one of the electrostatic film and the conductive layer, the other of the electrostatic film and the conductive layer is connected with the switch module, and the second output end (47) is connected with the switch module;

the H-bridge control module (4) is connected with the processor module (3), and under the control of the processor module (3), a first output end (46) and a second output end (47) of the H-bridge control module (4) are subjected to voltage alternating switching;

the constant current module (2) comprises a fifth MOS tube (211), a sixth MOS tube (212), a first resistor (221), a second resistor (222), a first triode (231), a second triode (232), a third triode (233), a fourth triode (234), a first operational amplifier (241) and a second operational amplifier (242), wherein the first resistor (221) and the second resistor (222) are connected in series to form a fourth branch circuit, the middle connection point of the first resistor (221) and the second resistor (222) is connected with a reference ground (25), the drain electrode of the fifth MOS tube (211) is connected with the first port (26), the source electrode of the fifth MOS tube (211) is connected with one end of the fourth branch circuit, the other end of the fourth branch circuit is connected with the source electrode of the sixth MOS tube (212), and the drain electrode of the sixth MOS tube (212) is connected with the second port (27); a voltage sampling point between the fifth MOS tube (211) and the first resistor (221) is connected with an inverting input end of the first operational amplifier (241), a voltage sampling point between the sixth MOS tube (212) and the second resistor (222) is connected with an inverting input end of the second operational amplifier (242), non-inverting input ends of the first operational amplifier (241) and the second operational amplifier (242) are connected with a reference voltage, an output end of the first operational amplifier (241) is respectively connected with bases of the first triode (231) and the second triode (232), an output end of the second operational amplifier (242) is respectively connected with bases of the third triode (233) and the fourth triode (234), an emitter of the first triode (231) and an emitter of the second triode (232) are respectively connected with a gate of the fifth MOS tube (211), and emitters of the third triode (233) and the fourth triode (234) are respectively connected with a gate of the sixth MOS tube (212).

2. The energy-saving sun-shading system according to claim 1, wherein the H-bridge control module (4) comprises a first MOS transistor (41), a second MOS transistor (42), a third MOS transistor (43) and a fourth MOS transistor (44), the first MOS transistor (41) and the second MOS transistor (42) are disposed on a second branch between the bus voltage terminal and the ground terminal, the third MOS transistor (43) and the fourth MOS transistor (44) are disposed on a third branch between the bus voltage terminal and the ground terminal, the first output terminal (46) is disposed between the first MOS transistor (41) and the second MOS transistor (42), and the second output terminal (47) is disposed between the third MOS transistor (43) and the fourth MOS transistor (44);

the grid of first MOS pipe (41), the grid of second MOS pipe (42), the grid of third MOS pipe (43), the grid of fourth MOS pipe (44) respectively with processor module (3) are connected, processor module (3) control first MOS pipe (41) and fourth MOS pipe (44) switch on and second MOS pipe (42) and third MOS pipe (43) close, perhaps, processor module (3) control second MOS pipe (42) and third MOS pipe (43) switch on and first MOS pipe (41) and fourth MOS pipe (44) close.

3. The energy-saving sunshade system according to claim 1, wherein said energy-saving sunshade system comprises a plurality of sunshade modules (8), said switch module comprises a plurality of electronic switches (7), said electronic switches (7) correspond to said sunshade modules (8) one by one, each sunshade module (8) and said electronic switch (7) are connected in series to form a first branch, and each first branch is connected in parallel.

4. Energy-saving sun-shading system according to claim 3, characterized in that the sensing module (6) comprises one or more sensors, the sensors are connected with the input end of the processor module (3), the control end of the electronic switch (7) is connected with the output end of the processor module (3), and the processor module (3) controls the electronic switch (7) to be switched on or switched off according to the detection result of the sensors.

5. The energy-saving sun shading system according to claim 1, wherein the constant voltage source module (1) comprises a power supply, a boost chip (11) and a boost circuit, the power supply is a photovoltaic power supply or a storage battery, the boost circuit comprises a transformer (12), a seventh MOS (metal oxide semiconductor) transistor (14), a third resistor (16), a fourth resistor (17) and a fifth resistor (15), a primary coil of the transformer (12) is respectively connected with the power supply and a source electrode of the seventh MOS transistor (14), a drain electrode of the seventh MOS transistor (14) is grounded through the fifth resistor (15), and a gate electrode of the seventh MOS transistor (14) is connected with the boost chip (11);

the third resistor (16) and the fourth resistor (17) are connected in series to form a fifth branch circuit, a secondary coil of the transformer (12) is connected with a bus voltage end and one end of the fifth branch circuit respectively, the other end of the fifth branch circuit is grounded, a feedback end is arranged between the third resistor (16) and the fourth resistor (17), and the feedback end is connected with a feedback pin of the boosting chip (11).

6. The energy-saving sunshade system according to claim 1, further comprising a human-computer interaction module, wherein the human-computer interaction module is connected with an input end of the processor module (3), and the processor module (3) controls the switch module according to an input instruction of the human-computer interaction module.

7. The energy-saving sun-shading system according to claim 3, further comprising a human-computer interaction module, wherein the human-computer interaction module is connected with the input end of the processor module (3), and the processor module (3) controls the corresponding electronic switch (7) to be turned on or turned off according to an input instruction of the human-computer interaction module.

8. The energy-saving sun shading system as set forth in claim 7, further comprising a pyroelectric infrared sensor disposed indoors for detecting changes in human infrared spectrum, the pyroelectric infrared sensor being connected to the input end of the processor module (3);

the processor module (3) switches a sensing control mode or a human-computer interaction control mode according to a detection result of the pyroelectric infrared sensor, when the pyroelectric infrared sensor detects that no people are in a room, the processor module (3) controls the on-off of the electronic switch (7) according to the detection result of the sensor, otherwise, the processor module (3) controls the on-off of the electronic switch (7) according to an input instruction of the human-computer interaction module.