CN219869887U - Boiler water volume detection circuit - Google Patents
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- CN219869887U CN219869887U CN202321123715.7U CN202321123715U CN219869887U CN 219869887 U CN219869887 U CN 219869887U CN 202321123715 U CN202321123715 U CN 202321123715U CN 219869887 U CN219869887 U CN 219869887U
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- 239000003990 capacitor Substances 0.000 claims description 124
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
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Abstract
The utility model discloses a boiler water volume detection circuit, which relates to the field of liquid level detection and comprises: the device comprises a main control module, a power supply module, a water level detection module, a display module, a power conversion module and a temperature acquisition module; the power supply module is connected with the main control module; the water level detection module comprises a pressure sensor, and the output end of the pressure sensor is connected with the main control module; the input end of the display module is connected with the main control module; the input end of the power conversion module is connected with the main control module, and the output end of the power conversion module is used for being connected with a boiler heating wire; the output end of the temperature acquisition module is connected with the main control module; the main control module outputs a power adjusting signal according to the boiler water level information and the boiler water temperature information. The utility model has the following effects: the pressure sensor is used for detecting the water level in the boiler, so that the water level is less influenced by external factors, the use is more convenient, and the conversion of multiple powers under different functional requirements of the boiler can be realized.
Description
Technical Field
The utility model relates to the field of liquid level detection, in particular to a boiler water volume detection circuit.
Background
The boiler liquid level detection plays a very important role in the whole heating system, and maintaining the boiler liquid level within a certain range is a necessary condition for ensuring the normal operation of the boiler. When the boiler lacks water, the phenomena of dry combustion and burning out of the water-cooled wall can occur, the service life of the boiler is not only influenced, but also potential safety hazards exist.
The current method for detecting the water level of the container is that the floating ball drives the magnet to ascend or descend to trigger the reed switch so as to achieve the purpose of detecting the water level in the container. However, when the magnet encounters high temperature, the magnet is gradually demagnetized, so that the detection performance is reduced and even fails, and the detection result is influenced.
Accordingly, there is a need for improvement and development in the art.
Disclosure of Invention
The utility model aims to solve the technical problems that the performance of a water level detection device is reduced even further influencing the water level detection effect in the prior art after long-term use.
The technical scheme adopted by the utility model for solving the problems is as follows:
a boiler water volume detection circuit, comprising: the device comprises a main control module, a power supply module, a water level detection module and a power conversion module; wherein,,
the power supply module is connected with the main control module and is used for supplying power to the main control module;
the water level detection module comprises a pressure sensor, and the output end of the pressure sensor is connected with the main control module and is used for feeding back the detected water level information of the boiler to the main control module;
the input end of the display module is connected with the main control module and is used for displaying the working state of the main control module;
the input end of the power conversion module is connected with the main control module and used for receiving a power adjustment signal, and the output end of the power conversion module is used for being connected with a boiler heating wire;
the main control module is connected with the pressure sensor and is used for outputting a power adjusting signal according to the boiler water level information.
Further, the water level detection module further comprises a first capacitor and a second capacitor, wherein the power end of the pressure sensor and the connecting node of the first capacitor and the second capacitor are connected with a power supply, and the other end of the first capacitor and the other end of the second capacitor are grounded; the output end of the pressure sensor is connected with the main control module and is used for transmitting the detected water level signal to the main control module.
Further, the display module comprises a display interface, a first resistor, a second resistor and a third resistor, wherein a first pin of the display interface is connected with a power supply, a second pin of the display interface is grounded, a third pin of the display interface is connected with one end of the first resistor, a fourth pin of the display interface is connected with one end of the second resistor, a fifth pin of the display interface is connected with one end of the third resistor, and the other ends of the first resistor, the second resistor and the third resistor are all connected with the main control module.
Further, the power conversion module comprises a control subunit and a detection subunit, wherein the input end of the control subunit is connected with the main control module and is used for receiving a heating control signal of the main control module, and the output end of the control subunit is used for being connected with a boiler heating wire; the input end of the detection subunit is connected with the output end of the control subunit and is used for detecting whether the boiler heating wire is disconnected or not, and the output end of the detection subunit is used for outputting detection signals.
Further, the control subunit comprises a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, a first triode and a silicon controlled rectifier;
one end of the fourth resistor is connected with the input end of the control subunit, the other end of the fourth resistor is connected with one end of the fifth resistor, one end of the three capacitors and the base electrode of the first triode, the other end of the fifth resistor is connected with a power supply, the other end of the third capacitor is grounded, the emitter electrode of the first triode is connected with the power supply, the collector electrode of the first triode is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with one end of the fourth capacitor, one end of the seventh resistor and the control electrode of the silicon controlled rectifier, the other end of the fourth capacitor, the other end of the seventh resistor, the anode of the silicon controlled rectifier and one end of the eighth resistor are grounded, the cathode of the silicon controlled rectifier is connected with one end of the fifth capacitor and the output end of the control subunit, one end of the eighth resistor is connected with one end of the ninth resistor, and the other end of the ninth resistor is connected with the other end of the fifth capacitor.
Further, the detection subunit includes a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a sixth capacitor, a second triode, and a first diode;
one end of the tenth resistor is connected with the input end of the detection subunit, the other end of the tenth resistor is connected with one end of the eleventh resistor, the other end of the eleventh resistor is connected with one end of the twelfth resistor, the positive electrode of the first diode and the base electrode of the second triode, and the other end of the twelfth resistor, the negative electrode of the first diode and the transmitter of the second triode are grounded; the collector electrode of the second triode is connected with one end of the twelfth resistor, and the other end of the twelfth resistor is connected with a power supply;
the connection node of the sixth capacitor and the thirteenth resistor is connected with the output end of the detection subunit, one end, far away from the thirteenth resistor, of the sixth capacitor is grounded, and one end, far away from the sixth resistor, of the thirteenth resistor is connected with the collector of the second triode and the connection node of the fourteenth resistor.
Further, the main control module comprises a main control chip, a fifteenth resistor, a sixteenth resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor and a tenth capacitor;
the first pin of the main control chip is connected with one end of the fifteenth resistor, the other end of the fifteenth resistor is connected with a power supply and one end of the sixteenth resistor, the other end of the sixteenth resistor is connected with the second pin of the main control chip and one end of the seventh capacitor, and the other end of the seventh capacitor is grounded;
the sixth pin of the main control chip is connected with one end of the eighth capacitor, the ninth capacitor and the tenth capacitor are connected in parallel between the seventh pin and the eighth pin of the main control chip, the connection node of the ninth capacitor and the seventh pin of the main control chip, and the other end of the eighth capacitor are grounded, and the connection node of the ninth capacitor and the eighth pin of the main control chip are connected with a power supply.
Further, the boiler water quantity detection circuit further comprises a temperature acquisition module, wherein the temperature acquisition module comprises a temperature-sensitive resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor and an eleventh capacitor, one end of the temperature-sensitive resistor is connected with one end of the seventeenth resistor, one end of the eighteenth resistor and one end of the nineteenth resistor, the other end of the seventeenth resistor is connected with a power supply, the other end of the eighteenth resistor is connected with one end of the eleventh capacitor, and the other ends of the eleventh capacitor, the nineteenth resistor and the temperature-sensitive resistor are grounded; the connection node of the eighteenth resistor and the eleventh capacitor is connected with the main control module and used as the output end of the temperature acquisition module.
Further, the boiler water volume detection circuit further comprises an alarm module, the alarm module comprises a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a twelfth capacitor, a third triode and a buzzer, one end of the twenty-first resistor is connected with the main control module, the other end of the twenty-first resistor is connected with one end of the twelfth capacitor, one end of the twenty-first resistor and a base of the third triode, the other end of the twelfth capacitor, the other end of the twenty-first resistor and an emitter of the third triode are grounded, a collector of the third triode is connected with one end of the twenty-second resistor and one end of the buzzer, the other end of the twenty-second resistor and the other end of the buzzer are connected with one end of the twenty-third resistor, and the other end of the twenty-third resistor is connected with a power supply.
Further, the boiler water amount detection circuit further comprises a zero crossing detection module, the zero crossing detection module comprises a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a thirteenth capacitor, a fourth triode and a second diode, one end of the twenty-fourth resistor is connected with the power supply module, the twenty-fifth resistor is connected with the twenty-fourth resistor in series, one end of the twenty-fifth resistor, which is far away from the twenty-fourth resistor, is connected with one end of the twenty-sixth resistor, the positive electrode of the second diode and the base electrode of the fourth triode, the other end of the twenty-sixth resistor and the negative electrode of the second diode are grounded, the base electrode of the fourth triode is grounded, the collector electrode of the fourth triode is connected with one end of the twenty-seventh resistor and one end of the twenty-eighth resistor, the other end of the twenty-seventh resistor is connected with the power supply, the other end of the eighth resistor is connected with the thirteenth capacitor and the thirteenth capacitor is grounded, and the other end of the thirteenth capacitor is grounded.
The utility model has the following beneficial effects: by adopting the pressure sensor to detect the water level in the boiler, compared with the detection of the water level by using an electromagnet component, the water level detection can be realized at different temperature points due to less influence of external factors such as temperature, the use is more convenient, and the pressure sensor can convert the gas pressure into linear analog or digital signals so as to carry out linear detection on the water level; in addition, the utility model can also adjust the power required by the operation of the boiler so as to realize the conversion of multiple powers under different functional requirements. Therefore, the problem that the water level detection device in the prior art can cause performance degradation or even failure after long-term use so as to influence the water level detection effect is solved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic block diagram of a boiler water volume detection circuit according to an embodiment of the present utility model.
Fig. 2 is a schematic circuit diagram of a master control module of a boiler water volume detection circuit according to an embodiment of the present utility model.
Fig. 3 is a schematic circuit diagram of a program download port of a boiler water volume detection circuit according to an embodiment of the present utility model.
Fig. 4 is a schematic circuit diagram of a power module of a boiler water volume detection circuit according to an embodiment of the present utility model.
Fig. 5 is a schematic circuit diagram of a water level detection module of a boiler water level detection circuit according to an embodiment of the present utility model.
Fig. 6 is a schematic circuit diagram of a display module of a boiler water volume detection circuit according to an embodiment of the present utility model.
Fig. 7 is a schematic circuit diagram of a power conversion module of a boiler water volume detection circuit according to an embodiment of the present utility model.
Fig. 8 is a schematic circuit diagram of a temperature acquisition module of a boiler water volume detection circuit according to an embodiment of the present utility model.
FIG. 9 is a schematic circuit diagram of an alarm module of a boiler water volume detection circuit according to an embodiment of the present utility model.
Fig. 10 is a schematic circuit diagram of a zero-crossing detection module of a boiler water volume detection circuit according to an embodiment of the present utility model.
Reference numerals: 1. a main control module; 2. a power module; 3. a water level detection module; 4. a display module; 5. a power conversion module; 51. a control subunit; 52. a detection subunit; 6. a temperature acquisition module; 7. an alarm module; 8. and a zero-crossing detection module.
Detailed Description
The utility model discloses a boiler water volume detection circuit, which is used for making the purpose, the technical scheme and the effect of the utility model clearer and more definite, and is further described in detail below by referring to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The current method for detecting the water level of the container is that the floating ball drives the magnet to ascend or descend to trigger the reed switch so as to achieve the purpose of detecting the water level in the container. However, when the magnet is subjected to high temperature, the magnet is gradually demagnetized, so that the detection performance is reduced and even fails, the detection result is influenced, and the method can only detect the water level in a segmented mode and cannot measure the water quantity linearly.
In addition, there are methods for detecting the water level by using capacitance to ground and detecting the resistance of water in a container by using a probe in the market, but both methods have defects when used, the capacitance detection method applies different capacitances to water with different purities, and the same capacitance is adopted to often cause erroneous judgment; the long-term electrification of the probe can cause electrolytic scaling, and resistance change is easy to occur after scaling, so that detection distortion is caused, and the two modes can only be detected in a segmented mode.
In view of the above-mentioned drawbacks of the prior art, the present utility model provides a boiler water volume detection circuit, referring to fig. 1, comprising: the device comprises a main control module 1, a power supply module 2, a water level detection module 3, a display module 4 and a power conversion module 5; the power module 2 is connected with the main control module 1 and is used for supplying power to the main control module 1; the water level detection module 3 comprises a pressure sensor IC1, and the output end of the pressure sensor IC1 is connected with the main control module 1 and is used for feeding back the detected boiler water level information to the main control module 1; the input end of the display module 4 is connected with the main control module 1 and is used for displaying the working state of the main control module 1; the input end of the power conversion module 5 is connected with the main control module 1 and used for receiving a power adjustment signal, and the output end of the power conversion module 5 is used for being connected with a boiler heating wire; the main control module 1 is connected with the pressure sensor IC1 and is used for outputting power adjusting signals according to boiler water level information.
When the boiler is used, the boiler is placed on the detection device, the pressure sensor IC1 converts the water pressure and the air pressure in the boiler to obtain water level information in the boiler and feeds the water level information back to the main control module, the main control module judges the water level information and outputs a power adjusting signal to the power conversion module so as to realize the heating state and stop heating of liquid and the heating under different powers, thereby protecting the boiler and the heating device. The display module displays the working state of the main control module so as to be convenient for a user to use, and the power module 1 converts input alternating current commercial power into direct current voltage required by the system and supplies power to the detection system.
Specifically, referring to fig. 2, the main control module 1 includes a main control chip U6, a fifteenth resistor R103, a sixteenth resistor R102, a seventh capacitor C35, an eighth capacitor C39, a ninth capacitor C11, and a tenth capacitor C12.
The first pin (Tool 0) of the main control chip U6 is connected to one end of the fifteenth resistor R103, the other end of the fifteenth resistor R103 is connected to the power supply and one end of the sixteenth resistor R102, the other end of the sixteenth resistor R102 is connected to the second pin (NRST) of the main control chip U6 and one end of the seventh capacitor C35, and the other end of the seventh capacitor C35 is grounded.
The sixth pin of the main control chip U6 is connected with one end of the eighth capacitor C39, the ninth capacitor C11 and the tenth capacitor C12 are connected in parallel between the seventh pin and the eighth pin of the main control chip U6, the connection node of the ninth capacitor C11 and the seventh pin of the main control chip U6 and the other end of the eighth capacitor C39 are grounded, and the connection node of the ninth capacitor C11 and the eighth pin of the main control chip U6 are connected with a power supply.
The twentieth pin (TX) and the twenty-third pin (RX) of the main control chip U6 are network communication pins for communicating with other devices.
Referring to fig. 3, the apparatus performs a program input to the main control chip U6 through the program download port JP4, connects the third pin of the program download port JP4 with the other end of the fifteenth resistor, and connects the fourth pin of the program download port JP4 with the second pin of the main control chip U6. The first pin of the program download port JP4 is connected to a +5V power supply, and the second pin of the program download port JP4 is grounded.
Referring to fig. 4, the power module 2 includes a conversion chip U1, and the conversion chip U1 converts input ac mains supply into dc power required by the detection device and provides power for the detection system.
Referring to fig. 5, the water level detection module 3 further includes a first capacitor C6 and a second capacitor C7, a third pin of the pressure sensor IC1 and a connection node of the first capacitor C6 and the second capacitor C7 are connected to a power source, and one ends of the first capacitor C6 and the second capacitor C7 far from the pressure sensor IC1 are grounded; the output end of the pressure sensor IC1 is connected with a twenty-fourth pin of the main control chip U6.
When the boiler does not have water, no pressure exists between the boiler and the pressure sensor IC1, when the boiler starts to inject water, the water level in the boiler is continuously increased, water pressure is generated, the water pressure pushes the air pressure in the boiler to increase, and the pressure sensor IC1 converts the detected pressure into an electric signal and transmits the electric signal to the main control chip U6, so that the detection of the water level of the boiler is realized. The first capacitor C6 and the second capacitor C7 are decoupling filter capacitors and are connected in parallel to the power supply end of the pressure sensor IC1 so as to reduce the impedance of an input alternating current signal and achieve the functions of filtering and smoothing.
Referring to fig. 6, the display module 4 includes a display interface CN10, a first resistor R20, a second resistor R19, and a third resistor R18, a first pin of the display interface CN10 is connected to a +5v power supply, a second pin of the display interface CN10 is grounded, a third pin of the display interface CN10 is connected to one end of the first resistor R20, a fourth pin of the display interface CN10 is connected to one end of the second resistor R19, a fifth pin of the display interface CN10 is connected to one end of the third resistor R18, the other end of the first resistor R20 is connected to a seventeenth pin of the main control chip U6, the other end of the second resistor R19 is connected to an eighteenth pin of the main control chip U6, and the other end of the third resistor R18 is connected to a nineteenth pin of the main control chip U6. The working state of the boiler is displayed through the display module 4 so as to be convenient for use in daily life.
Referring to fig. 1 and 7, the power conversion module 5 includes a control subunit 51 and a detection subunit 52, wherein an input end of the control subunit 51 is connected with the main control module 1 and is used for receiving a heating control signal of the main control module 1, and an output end of the control subunit 51 is used for connecting a boiler heating wire; the input end of the detection subunit 52 is connected to the output end of the control subunit 51, and is used for detecting whether the boiler heating wire is disconnected, and the output end of the detection subunit 52 is used for outputting a detection signal.
Specifically, the control subunit 51 includes a fourth resistor R22, a fifth resistor R26, a sixth resistor R25, a seventh resistor R21, an eighth resistor RX7, a ninth resistor RX8, a third capacitor C10, a fourth capacitor C9, a fifth capacitor C4, a first transistor Q2, and a thyristor TR1.
One end of the fourth resistor R22 is connected to an eleventh pin (Triac 1) of the main control chip U6, the other end of the fourth resistor R22 is connected to one end of the fifth resistor R26, one end of the third capacitor C10 and the base of the first triode Q2, the other end of the fifth resistor R26 is connected to +5v power, the other end of the third capacitor C10 is grounded, the emitter of the first triode Q2 is connected to +5v power, the collector of the first triode Q2 is connected to one end of the sixth resistor R25, the other end of the sixth resistor R25 is connected to one end of the fourth capacitor C9, one end of the seventh resistor R21 and the control electrode of the thyristor TR1, the other end of the fourth capacitor C9, the other end of the seventh resistor R21, the anode of the thyristor TR1 and one end of the eighth resistor RX7 are grounded, the cathode of the thyristor TR1 and the connection node of the fifth capacitor C4 are used as the output end of the control subunit 51, and the other end of the eighth resistor RX7 is connected to the other end of the ninth resistor RX 8.
The main control chip U6 adjusts the on time and the duty ratio of the silicon controlled rectifier TR1 by outputting different power adjusting signals (high and low levels), so that the heating signals with different powers are output to the boiler heating wire, and the multi-power heating function is realized. The first transistor Q2 plays a role of switching protection, the fourth resistor R22 and the fifth resistor R26 divide the input signal, and the third capacitor C10 performs a filtering process on the input signal.
The detection subunit 52 includes a tenth resistor RX4, an eleventh resistor RX5, a twelfth resistor RX6, a thirteenth resistor R29, a fourteenth resistor R31, a sixth capacitor C13, a second triode Q3, and a first diode D5.
One end of the tenth resistor RX4 is connected with the output end of the control subunit 51, the other end of the tenth resistor RX4 is connected with one end of the eleventh resistor RX5, the other end of the eleventh resistor RX5 is connected with one end of the twelfth resistor RX6, the positive electrode of the first diode D5 and the base electrode of the second triode Q3, and the other end of the twelfth resistor RX6, the negative electrode of the first diode D5 and the emitter electrode of the second triode Q3 are grounded; the collector of the second triode Q3 is connected with one end of a thirteenth resistor R29 and one end of a fourteenth resistor R31, the other end of the thirteenth resistor R29 is connected with a +5V power supply, the other end of the fourteenth resistor R31 is connected with one end of a sixth capacitor C13 and a sixteenth pin (HT-Check 1) of a main control chip U6, and the other end of the sixth capacitor C13 is grounded.
If the boiler heating wire is disconnected, no signal is input to the base electrode of the second triode Q3, and the collector electrode and the emitter electrode of the second triode Q3 cannot be conducted, so that the output end of the detection subunit 52 outputs an invalid signal, thereby realizing detection on whether the boiler heating wire is disconnected.
The boiler water amount detection circuit further comprises a temperature acquisition module 6, referring to fig. 8, the temperature acquisition module 6 comprises a temperature sensitive resistor NTC, a seventeenth resistor R13, an eighteenth resistor R17, a nineteenth resistor R16 and an eleventh capacitor C8, one end of the temperature sensitive resistor NTC is connected with one end of the seventeenth resistor R13, one end of the eighteenth resistor R17 and one end of the nineteenth resistor R16, the other end of the seventeenth resistor R13 is connected with a +5v power supply, the other end of the nineteenth resistor R16 is connected with one end of the eleventh capacitor C8, and the other ends of the eleventh capacitor C8, the eighteenth resistor R17 and the other end of the temperature sensitive resistor NTC are grounded; the connection node of the nineteenth resistor R16 and the eleventh capacitor C8 is connected to the thirty-first pin (NTC 1) of the main control chip U6 and is used as an output terminal of the temperature acquisition module 6.
The temperature acquisition module 6 acquires the temperature of the liquid in the boiler and feeds water temperature information back to the main control module 1. Specifically, the temperature-sensitive resistor NTC1 converts the temperature of the boiler into an electrical signal and transmits the electrical signal to the thirty-th pin (NTC 1) of the main control chip U6, so that the detection of the water level in the container at different temperatures can be realized.
The boiler water volume detection circuit further comprises an alarm module 7, referring to fig. 9, the alarm module 7 comprises a twenty-first resistor R33, a twenty-first resistor R34, a twenty-second resistor R32, a twenty-third resistor R30, a twelfth capacitor C14, a third triode Q4 and a Buzzer SP1, one end of the twenty-second resistor R33 is connected with a twelfth pin (Buzzer) of the main control chip, the other end of the twenty-second resistor R33 is connected with one end of the twelfth capacitor C14, one end of the twenty-first resistor R34 and a base of the third triode Q4, the other end of the twelfth capacitor C14, the other end of the twenty-first resistor R34 and an emitter of the third triode Q4 are grounded, a collector of the third triode Q4 is connected with one end of the twenty-second resistor R32 and one end of the Buzzer SP1, the other end of the twenty-second resistor R32 and the other end of the Buzzer SP1 are connected with one end of the twenty-third resistor R30, and the other end of the twenty-third resistor R30 is connected with a +5v power supply.
When the boiler heating wire is disconnected, an invalid signal is input to a sixteenth pin (HT-Check 1) of the main control chip U6, the main control chip U6 performs judgment processing, and then a Buzzer signal is output through a twelfth pin of the main control chip U6 so as to drive the Buzzer SP1 to perform alarm prompt.
Referring to fig. 10, the boiler water amount detection circuit further includes a ZERO crossing detection module 8, the ZERO crossing detection module 8 includes a twenty-fourth resistor RX1, a twenty-fifth resistor RX2, a twenty-sixth resistor RX3, a twenty-seventh resistor R10, a twenty-eighth resistor R11, a thirteenth capacitor C5, a fourth triode Q1, and a second diode D4, one end of the twenty-fourth resistor RX1 is connected to the power supply module 2, the twenty-fifth resistor RX2 is connected in series with the twenty-fourth resistor RX1, one end of the twenty-fifth resistor RX2 remote from the twenty-fourth resistor RX1 is connected to one end of the twenty-sixth resistor RX3, an anode of the second diode D4, and a base of the fourth triode Q1, the other end of the twenty-sixth resistor RX3 and a cathode of the second diode D4 are grounded, a base of the fourth triode Q1 is grounded, one end of the fourth triode Q1 is connected to one end of the twenty-seventh resistor R10 and one end of the twenty-eighth resistor R11, the other end of the twenty-seventh resistor R10 is connected to +v5, and the other end of the thirteenth capacitor C5 is connected to the other end of the thirteenth capacitor C5 and the thirteenth capacitor C is connected to the thirteenth capacitor C5.
The second diode D4 is turned on unidirectionally, and when the alternating current is input, the fourth triode Q1 is turned on for a period of time and turned off for a period of time, so that a pulse waveform is formed at the third pin (ZERO) of the main control chip U6 after such repeated turning on and off, and the main control chip U6 detects the ZERO point of the input voltage by judgment and provides a standard of ZERO voltage starting point.
The utility model has the following beneficial effects: through adopting pressure sensor IC1 to detect the water level in the boiler, compare in using electromagnet components and parts to realize detecting to the water level, it is less to receive external factor such as temperature influence to combine temperature acquisition module 6 to realized carrying out the detection of water level at different temperature points, also for electric capacity or probe device, no longer need consider the influence of quality of water, scale deposit, it is more convenient to use. The pressure sensor IC1 can convert the gas pressure into linear analog or digital signals, so that the linear detection of the water level is realized; in addition, the utility model can also adjust the power required by the operation of the boiler so as to realize the conversion of multiple powers under different functional requirements. Therefore, the problem that the water level detection device in the prior art can cause performance degradation or even failure after long-term use so as to influence the water level detection effect is solved.
It is to be understood that the utility model is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (10)
1. A boiler water volume detection circuit, comprising: the device comprises a main control module, a power supply module, a water level detection module, a display module and a power conversion module; wherein,,
the power supply module is connected with the main control module and is used for supplying power to the main control module;
the water level detection module comprises a pressure sensor, and the output end of the pressure sensor is connected with the main control module and is used for feeding back the detected water level information of the boiler to the main control module;
the input end of the display module is connected with the main control module and is used for displaying the working state of the main control module;
the input end of the power conversion module is connected with the main control module and used for receiving a power adjustment signal, and the output end of the power conversion module is used for being connected with a boiler heating wire;
the main control module is connected with the pressure sensor and is used for outputting a power adjusting signal according to the boiler water level information.
2. The boiler water level detection circuit of claim 1 wherein said water level detection module includes: the power supply end of the pressure sensor and the connecting node of the first capacitor and the second capacitor are connected with a power supply, and the other end of the first capacitor and the other end of the second capacitor are grounded; the output end of the pressure sensor is connected with the main control module and is used for transmitting the detected water level signal to the main control module.
3. The boiler water volume detection circuit of claim 1 wherein said display module includes: the display interface comprises a display interface, a first resistor, a second resistor and a third resistor, wherein a first pin of the display interface is connected with a power supply, a second pin of the display interface is grounded, a third pin of the display interface is connected with one end of the first resistor, a fourth pin of the display interface is connected with one end of the second resistor, a fifth pin of the display interface is connected with one end of the third resistor, and the other ends of the first resistor, the second resistor and the third resistor are all connected with the main control module.
4. The boiler water volume detection circuit according to claim 1, wherein the power conversion module comprises a control subunit and a detection subunit, the input end of the control subunit is connected with the main control module and is used for receiving a heating control signal of the main control module, and the output end of the control subunit is used for connecting a boiler heating wire; the input end of the detection subunit is connected with the output end of the control subunit and is used for detecting whether the boiler heating wire is disconnected or not, and the output end of the detection subunit is used for outputting detection signals.
5. The boiler water volume detection circuit of claim 4 wherein said control subunit includes a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, a first triode, a thyristor;
one end of the fourth resistor is connected with the input end of the control subunit, the other end of the fourth resistor is connected with one end of the fifth resistor, one end of the three capacitors and the base electrode of the first triode, the other end of the fifth resistor is connected with a power supply, the other end of the third capacitor is grounded, the emitter electrode of the first triode is connected with the power supply, the collector electrode of the first triode is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with one end of the fourth capacitor, one end of the seventh resistor and the control electrode of the silicon controlled rectifier, the other end of the fourth capacitor, the other end of the seventh resistor, the anode of the silicon controlled rectifier and one end of the eighth resistor are grounded, the cathode of the silicon controlled rectifier is connected with one end of the fifth capacitor and the output end of the control subunit, one end of the eighth resistor is connected with one end of the ninth resistor, and the other end of the ninth resistor is connected with the other end of the fifth capacitor.
6. The boiler water volume detection circuit of claim 4 wherein said detection subunit includes a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a sixth capacitor, a second triode, and a first diode;
one end of the tenth resistor is connected with the input end of the detection subunit, the other end of the tenth resistor is connected with one end of the eleventh resistor, the other end of the eleventh resistor is connected with one end of the twelfth resistor, the positive electrode of the first diode and the base electrode of the second triode, and the other end of the twelfth resistor, the negative electrode of the first diode and the transmitter of the second triode are grounded; the collector electrode of the second triode is connected with one end of the twelfth resistor, and the other end of the twelfth resistor is connected with a power supply;
the connection node of the sixth capacitor and the thirteenth resistor is connected with the output end of the detection subunit, one end, far away from the thirteenth resistor, of the sixth capacitor is grounded, and one end, far away from the sixth resistor, of the thirteenth resistor is connected with the collector of the second triode and the connection node of the fourteenth resistor.
7. The boiler water volume detection circuit of claim 1 wherein said master control module includes a master control chip, a fifteenth resistor, a sixteenth resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor, and a tenth capacitor;
the first pin of the main control chip is connected with one end of the fifteenth resistor, the other end of the fifteenth resistor is connected with a power supply and one end of the sixteenth resistor, the other end of the sixteenth resistor is connected with the second pin of the main control chip and one end of the seventh capacitor, and the other end of the seventh capacitor is grounded;
the sixth pin of the main control chip is connected with one end of the eighth capacitor, the ninth capacitor and the tenth capacitor are connected in parallel between the seventh pin and the eighth pin of the main control chip, the connection node of the ninth capacitor and the seventh pin of the main control chip, and the other end of the eighth capacitor are grounded, and the connection node of the ninth capacitor and the eighth pin of the main control chip are connected with a power supply.
8. The boiler water amount detection circuit of claim 1 further including a temperature acquisition module including a temperature sensitive resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, and an eleventh capacitor, one end of the temperature sensitive resistor being connected to one end of the seventeenth resistor, one end of the eighteenth resistor, and one end of the nineteenth resistor, wherein the other end of the seventeenth resistor is connected to a power source, the other end of the eighteenth resistor is connected to one end of the eleventh capacitor, the other ends of the eleventh capacitor, the nineteenth resistor, and the other ends of the temperature sensitive resistor are grounded; the connection node of the eighteenth resistor and the eleventh capacitor is connected with the main control module and used as the output end of the temperature acquisition module.
9. The boiler water volume detection circuit of claim 1 further including an alarm module including a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a twelfth capacitor, a third triode, and a buzzer, one end of the twentieth resistor being connected to the main control module, the other end of the twentieth resistor being connected to one end of the twelfth capacitor, one end of the twenty-first resistor, and a base of the third triode, the other end of the twelfth capacitor, the other end of the twenty-first resistor, and an emitter of the third triode being grounded, a collector of the third triode being connected to one end of the twenty-second resistor and one end of the buzzer, the other end of the twenty-second resistor and the other end of the buzzer being connected to one end of the twenty-third resistor, the other end of the twenty-third resistor being connected to a power supply.
10. The boiler water amount detection circuit of claim 1 further including a zero crossing detection module including a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a thirteenth capacitor, a fourth triode, and a second diode, one end of the twenty-fourth resistor being connected to the power supply module, the twenty-fifth resistor being connected in series with the twenty-fourth resistor, one end of the twenty-fifth resistor being connected to one end of the twenty-sixth resistor, a positive electrode of the second diode, and a base of the fourth triode, the other end of the twenty-sixth resistor and a negative electrode of the second diode being grounded, a base of the fourth triode being connected to one end of the twenty-seventh resistor and one end of the eighth resistor, the other end of the twenty-seventh resistor being connected to one end of the twenty-seventh resistor, a collector of the twenty-sixth resistor and a collector of the thirteenth capacitor being connected to another end of the thirteenth capacitor being grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321123715.7U CN219869887U (en) | 2023-05-10 | 2023-05-10 | Boiler water volume detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321123715.7U CN219869887U (en) | 2023-05-10 | 2023-05-10 | Boiler water volume detection circuit |
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| CN219869887U true CN219869887U (en) | 2023-10-20 |
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| CN202321123715.7U Active CN219869887U (en) | 2023-05-10 | 2023-05-10 | Boiler water volume detection circuit |
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