CN212934116U

CN212934116U - Hot water circulation system control display circuit based on color screen display

Info

Publication number: CN212934116U
Application number: CN202021526032.2U
Authority: CN
Inventors: 程永利; 戚权明
Original assignee: Hangzhou Huixin Electronic Technology Co ltd
Current assignee: Hangzhou Huixin Electronic Technology Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-04-09
Anticipated expiration: 2030-07-29

Abstract

The utility model relates to a hot water circulating system control display circuit based on color screen display, which comprises a power supply conversion circuit, a drive circuit, a digital color screen module, an RS485 communication circuit, a control circuit, an alarm prompt circuit and a key circuit; the power supply output end of the power supply conversion circuit is connected with the power supply input ends of the driving circuit, the RS485 communication circuit, the control circuit and the alarm prompting circuit; the output end of the control circuit is connected with the input ends of the drive circuit and the alarm prompt circuit; the output end of the key circuit is connected with the input end of the control circuit, and the driving signal output end of the driving circuit is connected with the driving signal input end of the digital color screen module; the control circuit is also connected with the RS485 communication circuit. The utility model discloses a digital color screen shows the parameter, and the definition is high, is difficult for breaking, and its inside LED display lamp is whole integrated in a mould the inside, and moisture resistance is good.

Description

Hot water circulation system control display circuit based on color screen display

Technical Field

The utility model relates to a show technical field, especially relate to a hot water circulating system control display circuit based on color screen display.

Background

The hot water circulating system is a system for solving the problem that hot water (commonly called as cold water) with proper temperature cannot be used in time before the hot water is used because a central hot water system has a long pipeline; the existing hot water circulation system adopts line liquid crystal display for display mostly, the line liquid crystal display has the defects of easy breakage and poor moisture resistance, the service life of the line liquid crystal is shortened, the definition degree of the line liquid crystal display is generally low, and the displayed content is difficult to see if the distance is a little far away; moreover, the control and display of the existing hot water circulation system are basically integrated, for example, the control and display of the hot water circulation system in a hotel may be in one place, so that it is definitely very inconvenient if the control end of the hot water circulation system can only be reached if the parameters of the hot water circulation system are to be set or the parameters of the hot water circulation system are checked to detect whether the parameters are normal.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a hot water circulating system control display circuit based on color screen display, solved the not enough of current hot water circulating system demonstration existence.

The purpose of the utility model is realized through the following technical scheme: a hot water circulating system control display circuit based on color screen display comprises a power supply conversion circuit, a driving circuit, a digital color screen module, an RS485 communication circuit, a control circuit, an alarm prompt circuit and a key circuit; the power supply output end of the power supply conversion circuit is connected with the power supply input ends of the driving circuit, the RS485 communication circuit, the control circuit and the alarm prompting circuit; the output end of the control circuit is connected with the input ends of the drive circuit and the alarm prompt circuit; the output end of the key circuit is connected with the input end of the control circuit, and the driving signal output end of the driving circuit is connected with the driving signal input end of the digital color screen module; the control circuit is also connected with the RS485 communication circuit.

Further, the driving circuit includes a driving chip IC 2; 18 pins of the driving chip IC2 are used as output ports of driving signals and are connected to the driving signal input end of the digital color screen module; the power supply output end of the power supply conversion circuit is connected with

pins

14 and 27 of the driving chip IC 2; the output of the control circuit is connected to

pins

7, 8 and 9 of the driver chip IC 2.

Further, the control circuit comprises a single chip microcomputer chip IC 1;

pins

14, 15 and 16 of the singlechip chip IC1 are connected with the drive chip IC 2; the 17 th, 18 th and 20 th pins of the single chip IC1 are connected with the RS485 communication circuit; the 4 th pin of the single chip IC1 is connected with the alarm prompting circuit; and the power supply output end of the power supply conversion circuit is connected with the 8 th pin of the singlechip chip IC 1.

Further, the RS485 communication circuit comprises a communication chip IC3 and a connection terminal JP 1; the connecting terminal JP1 is provided with 4 connecting ports, wherein the 1 st port is connected with the 6 th pin of the chip IC3, and the 2 nd port is connected with the 7 th pin of the communication chip IC 3; the 1 st, 2 nd, 3 th and 4 th pins of the communication chip IC3 are connected with the single chip microcomputer chip IC 1; the power supply output terminal of the power conversion circuit is connected with

pins

5 and 8 of the communication chip IC 3.

Furthermore, the alarm prompt circuit comprises a triode and a buzzer; the buzzer is connected to the collector electrode of the triode, and the driving of the buzzer is realized through the triode; and the 4 th pin of the singlechip chip IC1 is connected with the base electrode of the triode, and the emitting electrode of the triode is grounded.

Furthermore, the key circuit comprises four keys, one ends of the four keys are grounded, and the other ends of the four keys are sequentially connected with

pins

13, 14, 15 and 16 of the singlechip chip IC 1.

Furthermore, the power conversion circuit comprises a buck chip U1, wherein the 1 st pin of the buck chip U1 is connected with two diodes connected in parallel and then is connected with a VDD input end; output voltage VCC behind the 4 th pin connection inductance of step-down chip U1, VCC connects drive circuit, RS485 communication circuit, control circuit, warning suggestion circuit and key circuit's power supply input end.

The utility model has the advantages that: a hot water circulating system control display circuit based on color screen display adopts a digital color screen to display parameters, has high definition, is not easy to break, and has good moisture resistance because all LED display lamps in the circuit are integrated in a die; receiving some parameter information of the hot water circulation system sent from the control end or the server end through an RS485 communication circuit, and displaying the parameter information on the liquid crystal module; RS 485's communication distance is about a kilometer, consequently by the utility model discloses integrated display panel can set up a plurality ofly in the local installation of difference, and every can show hot water circulating system's parameter information to can carry out the setting of some parameters through the button, greatly improved the convenience.

Drawings

FIG. 1 is a schematic block diagram of the present invention;

fig. 2 is a driving circuit diagram of the present invention;

FIG. 3 is the pin diagram of the digital color screen module of the present invention

Fig. 4 is a control circuit diagram of the present invention;

fig. 5 is a circuit diagram of RS485 communication circuit of the present invention;

FIG. 6 is a circuit diagram of the alarm prompt circuit of the present invention;

FIG. 7 is a circuit diagram of the key of the present invention;

fig. 8 is a power conversion circuit diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application. The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, a hot water circulation system control display circuit based on color screen display comprises a power supply conversion circuit, a driving circuit, a digital color screen module, an RS485 communication circuit, a control circuit, an alarm prompt circuit and a key circuit; the power supply output end of the power supply conversion circuit is connected with the power supply input ends of the driving circuit, the RS485 communication circuit, the control circuit and the alarm prompting circuit; the output end of the control circuit is connected with the input ends of the drive circuit and the alarm prompt circuit; the output end of the key circuit is connected with the input end of the control circuit, and the driving signal output end of the driving circuit is connected with the driving signal input end of the digital color screen module; the control circuit is also connected with the RS485 communication circuit.

As shown in fig. 2 and 3, the driving circuit includes a driving chip IC2 of model TM 1629D;

pins

32, 31, 29, 28, 24-15, 1, 2, 4 and 5 of the driver chip IC2 are connected to pins 1-18 of the digital color screen module as output ports of driving signals in a one-to-one manner, so as to realize display driving of the digital color screen module; the VCC output end of the power supply conversion circuit is connected with the 14 th pin and the 27 th pin of the driving chip IC 2; the output end of the control circuit is connected with the 7 th, 8 th and 9 th pins of the driving chip IC2, capacitors C10 and C9 are connected in parallel between the 7 th and 8 th pins of the driving chip IC2, a capacitor C8 is also connected to the 9 th pin, a capacitor C8 and capacitors C9 and C10 are also in parallel relation, and capacitors C11 and C12 are connected in parallel to the 14 th pin and the 27 th pin of the driving chip IC 2.

Furthermore, 18 pins of the digital color screen module are insulated and waterproof, and the internal LED display lamps are integrated in one die, so that the digital color screen module is not easy to break and cannot be influenced by a humid environment.

As shown in fig. 4, the control circuit includes a single chip IC1 of model STC15W404AS _ SOP 20;

pins

14, 15 and 16 of the singlechip chip IC1 are connected with a drive chip IC 2;

pins

17, 18 and 20 of the single chip IC1 are connected with an RS485 communication circuit; the 4 th pin of the single chip IC1 is connected with an alarm prompting circuit; and the VCC output end of the power supply conversion circuit is connected with the 8 th pin of the singlechip chip IC 1.

As shown in fig. 5, the RS485 communication circuit includes a communication chip IC3 and a connection terminal JP 1; the connecting terminal JP1 has 4 connecting ports including TXD, RXD, VDD and GND, wherein the 1 st port (TXD port) is connected with the 6 th pin (TXD port) of the communication chip IC3, and the 2 nd port is connected with the 7 th pin (RXD port) of the chip IC 3; the 1 st pin of the chip IC3 is connected with the 17 th pin of the chip IC1, the 2 nd and 3 rd pins of the chip IC3 are connected with the 19 th pin of the chip IC1, and the 4 th pin of the chip IC3 is connected with the 18 th pin of the chip IC 1; pins 5-8 of chip IC3 are also connected to some peripheral circuits; and the VDD port of the wiring terminal is connected with the VDD port of the power supply circuit.

As shown in fig. 6, the alarm prompting circuit includes an NPN transistor Q1 and a buzzer F1; one end of the buzzer is connected to a collector electrode of the triode, the buzzer is driven by the triode, and the other end of the buzzer is connected with a VCC end; the 4 th pin of the single chip IC1 is connected with the base of the triode through a resistor R5, and the emitter of the triode is grounded.

As shown in fig. 7, the key circuit includes four keys k1, k2, k3 and k4, one end of each of which is grounded, and the other end of each of which is connected to the 13 th, 14 th, 15 th and 16 th pins of the chip IC1 in sequence. Some parameters and settings may be made by keys k1, k2, k3 and k 4.

As shown in fig. 8, the power conversion circuit includes a buck chip U1, a pin 1 of the buck chip U1 is connected to two parallel diodes D1 and D2 and then connected to the VDD input terminal, the pin 1 is further connected to one ends of parallel capacitors C0 and C1, the other ends of the two parallel capacitors are grounded, and

pins

3 and 5 are grounded; output voltage VCC behind inductance L1 is connected to the 4 th pin of step-down chip U1, and 2 nd pin also is connected with VCC end, and diode D3's one end is still connected to the 2 nd pin, and diode D3's other end ground connection still has electric capacity C2 and C3 in parallel between inductance L1's output and ground connection, and VCC connects drive circuit, RS485 communication circuit, control circuit, warning suggestion circuit and key circuit's power supply input end.

The working process of the utility model is as follows: the RS485 communication circuit receives data information sent from a control end or a server end through RXD and TXD ports, and then the data information is transmitted to a single chip microcomputer in the control circuit to be processed, the single chip microcomputer transmits the data to a driving chip IC2, and the driving chip IC2 drives a digital color screen module to display; parameters can be set through 4 keys on the key circuit, and data are sent out through the RS485 communication chip; a buzzer in the alarm prompt circuit can send out alarm abnormal alarm prompt or prompt tone of a key and the like; the utility model discloses can be for installing in a plurality of places for display panel, just can realize showing through RS485 communication circuit received data, greatly made things convenient for setting up and the inspection of parameter among the hot water circulating system, and adopt digital color screen module to show the parameter, the definition is high, is difficult for breaking, and its inside LED display lamp is whole integrated inside a mould, and moisture resistance is good, has improved life-span life cycle.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a hot water circulating system control display circuit based on color screen display which characterized in that: the digital color screen display device comprises a power supply conversion circuit, a driving circuit, a digital color screen module, an RS485 communication circuit, a control circuit, an alarm prompt circuit and a key circuit; the power supply output end of the power supply conversion circuit is connected with the power supply input ends of the driving circuit, the RS485 communication circuit, the control circuit and the alarm prompting circuit; the output end of the control circuit is connected with the input ends of the drive circuit and the alarm prompt circuit; the output end of the key circuit is connected with the input end of the control circuit, and the driving signal output end of the driving circuit is connected with the driving signal input end of the digital color screen module; the control circuit is also connected with the RS485 communication circuit.

2. The hot water circulation system control display circuit based on color screen display as claimed in claim 1, wherein: the driving circuit comprises a driving chip IC 2; 18 pins of the driving chip IC2 are used as output ports of driving signals and are connected to the driving signal input end of the digital color screen module; the power supply output end of the power supply conversion circuit is connected with pins 14 and 27 of the driving chip IC 2; the output of the control circuit is connected to pins 7, 8 and 9 of the driver chip IC 2.

3. The hot water circulation system control display circuit based on color screen display as claimed in claim 2, wherein: the control circuit comprises a singlechip chip IC 1; pins 14, 15 and 16 of the singlechip chip IC1 are connected with the drive chip IC 2; the 17 th, 18 th and 20 th pins of the single chip IC1 are connected with the RS485 communication circuit; the 4 th pin of the single chip IC1 is connected with the alarm prompting circuit; and the power supply output end of the power supply conversion circuit is connected with the 8 th pin of the singlechip chip IC 1.

4. The hot water circulation system control display circuit based on color screen display as claimed in claim 3, wherein: the RS485 communication circuit comprises a communication chip IC3 and a wiring terminal JP 1; the connecting terminal JP1 is provided with 4 connecting ports, wherein the 1 st port is connected with the 6 th pin of the communication chip IC3, and the 2 nd port is connected with the 7 th pin of the communication chip IC 3; the 1 st, 2 nd, 3 th and 4 th pins of the communication chip IC3 are connected with the single chip microcomputer chip IC 1; the power supply output terminal of the power conversion circuit is connected with pins 5 and 8 of the communication chip IC 3.

5. The hot water circulation system control display circuit based on color screen display as claimed in claim 3, wherein: the alarm prompting circuit comprises a triode and a buzzer; the buzzer is connected to the collector electrode of the triode, and the driving of the buzzer is realized through the triode; and the 4 th pin of the singlechip chip IC1 is connected with the base electrode of the triode, and the emitting electrode of the triode is grounded.

6. The hot water circulation system control display circuit based on color screen display as claimed in claim 3, wherein: the key circuit comprises four keys, one ends of the four keys are grounded, and the other ends of the four keys are sequentially connected with pins 13, 14, 15 and 16 of the single chip microcomputer chip IC 1.

7. The hot water circulation system control display circuit based on color screen display as claimed in claim 1, wherein: the power supply conversion circuit comprises a voltage reduction chip U1, wherein the 1 st pin of the voltage reduction chip U1 is connected with two diodes connected in parallel and then is connected with a VDD input end; output voltage VCC behind the 4 th pin connection inductance of step-down chip U1, VCC connects drive circuit, RS485 communication circuit, control circuit, warning suggestion circuit and key circuit's power supply input end.