Heating module

Abstract

The utility model relates to the technical field of water dispensers, in particular to a heating module which comprises a temperature measuring unit, a water level detecting unit, a water quality detecting unit, a main control chip and a heating unit, the temperature measuring unit, the water level detecting unit, the water quality detecting unit and the heating unit are all electrically connected with the main control chip, and the temperature measuring unit is used for detecting water temperature. The water level detection unit detects the water level based on ultrasonic waves, the main control chip outputs signals to control the heating unit, the heating unit comprises a switch branch and a heating branch, and the switch branch controls the heating branch through a relay. The temperature measuring unit accurately detects the water temperature, the main control chip accurately controls the heating unit to work according to the set temperature, the water level is monitored in real time through the water level detection unit, the dry burning phenomenon is prevented, the service life of equipment is prolonged, the water quality is detected through the water quality detection unit, and a user can visually know the water quality condition through the display unit. Water sources are timely replaced or corresponding treatment measures are taken to ensure health and safety of drinking water.

Description

TECHNICAL FIELD

[0001] The utility model relates to drinking water machine technical field, specifically, relate to a heating module. BACKGROUND

[0002] In the traditional drinking water machine, usually only have simple heating function, can not accurately detect water temperature, water level and water quality condition, user in the use process, it is difficult to know whether the water temperature reaches the degree of suitable for drinking, is easy to be affected use experience because of water temperature is too high or too low, even possible there is scalding risk, for the loss of water level detection, can lead to dry burning and other security risks, damage the equipment, and with people's attention to healthy drinking water unceasingly improves, the traditional drinking water machine can not provide water quality information, can not satisfy user's monitoring demand to drinking water quality.

[0003] The utility model discloses a kind of drinking water machine heating control circuit, the drinking water machine heating control circuit, comprising: power supply wiring end U, one wiring end of the power supply wiring end U is connected with heat preservation indicating lamp D2 by wire, another wiring end of the power supply wiring end U is connected with temperature control switch two by wire;Temperature control switch one, electric heating wire are connected in parallel on the heat preservation indicating lamp D2, heating indicating lamp D1 is connected in parallel on the electric heating wire, the electric heating wire and temperature control switch two establish connection;The output end of the pressure sensor is connected with controller, the output end of the controller is connected with temperature control switch two.

[0004] Although, the utility model is set through temperature control switch two, when heating temperature reaches 95 ℃, heating circuit is disconnected, pressure detection value of pressure sensor has change, based on the change of the pressure detection value, controller controls temperature control switch two control on-off, realizes to drinking water machine heating circuit control;But water temperature cannot be accurately understood and controlled, cannot satisfy more needs of user. Utility model content

[0005] The utility model aims at providing a kind of heating module, to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of heating module, including temperature measurement unit, water level detection unit, water quality detection unit, main control chip and heating unit, the temperature measurement unit, the water level detection unit, the water quality detection unit and the heating unit are electrically connected with the main control chip, the temperature measurement unit is used to detect water temperature, the water level detection unit detects water level based on ultrasonic wave, the main control chip output signal controls the heating unit, the heating unit includes switch branch and heating branch, switch branch controls heating branch by relay.

[0008] As preferred, the temperature measuring unit comprises a temperature measuring chip U1, the model of the temperature measuring chip U1 is DHT11, and the output port of the temperature measuring chip U1 is connected to the input port of the main control chip.

[0009] As preferred, the water level detecting unit comprises a distance measuring chip U2, the model of the distance measuring chip U2 is HC-SR04, the trigger port of the distance measuring chip U2 is connected to the output port of the main control chip, and the output port of the distance measuring chip U2 is connected to the input port of the main control chip.

[0010] As preferred, the water quality detecting unit comprises a turbidity detecting circuit, a residual chlorine detecting circuit and a pH value detecting circuit, and the turbidity detecting circuit, the residual chlorine detecting circuit and the pH value detecting circuit are electrically connected to the main control chip.

[0011] As preferred, the display unit and the interactive unit are further included, and the display unit and the interactive unit are electrically connected to the main control chip.

[0012] As preferred, the switch branch comprises a power supply VCC, a resistor R1, a resistor R2, a resistor R3, an indicator lamp L, a triode Q, a diode D and a relay KA, and the heating branch comprises a 220V mains, a switch S and a resistor R4.

[0013] The first end of the resistor R1 is connected to the output port of the main control chip, the second end of the resistor R1 is connected to the base of the triode Q, the emitter of the triode Q is connected to the ground, the first end of the resistor R2 is connected to the base of the triode Q, the second end of the resistor R2 is connected to the ground, the first end of the resistor R3 is connected to the power supply VCC, the second end of the resistor R3 is connected to the first end of the indicator lamp L, the second end of the indicator lamp L is connected to the collector of the triode Q, the anode of the diode D is connected to the collector of the triode Q, the cathode of the diode D is connected to the power supply VCC, the first end of the relay KA is connected to the power supply VCC, the second end of the relay KA is connected to the collector of the triode Q, and the relay KA is used for controlling the switch S.

[0014] The first end of the switch S is connected to the 220V mains, the second end of the switch S is connected to the first end of the heating resistor R4, and the second end of the resistor R4 is connected to the 220V mains.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] The utility model discloses a temperature measuring unit is set up accurate detection water temperature, and the data is transmitted to the main control chip, and the main control chip is according to the set temperature accurate control heating unit work, through water level detecting unit real -time monitoring water level, when water level is too low, the main control chip can control heating unit to stop heating in time, prevents dry -burning phenomenon to occur, prolongs the service life of equipment, and the water quality detecting unit detects water quality, and the user can intuitively understand water quality condition through the display unit, and replaces water source or takes corresponding processing measures in time, ensures the health and safety of drinking water. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 is a circuit diagram of the temperature measuring unit in the utility model;

[0019] Figure 3 is a circuit diagram of the water level detecting unit in the utility model;

[0020] Figure 4 is a schematic diagram of the water quality detecting unit in the utility model;

[0021] Figure 5 is a circuit diagram of the heating unit in the utility model;

[0022] In the drawings:

[0023] 1, temperature measuring unit;

[0024] 2, water level detecting unit;

[0025] 3, water quality detecting unit; 30, turbidity detecting circuit; 31, residual chlorine detecting circuit; 32, pH value detecting circuit;

[0026] 4, main control chip;

[0027] 5, display unit;

[0028] 6, interactive unit;

[0029] 7, heating unit. DETAILED DESCRIPTION

[0030] The technical solutions in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are only some of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0031] Please refer to Figures 1-5 The utility model provides technical solutions:

[0032] The application discloses a heating module, which comprises a temperature measuring unit 1, a water level detecting unit 2, a water quality detecting unit 3, a main control chip 4 and a heating unit 7, wherein the temperature measuring unit 1, the water level detecting unit 2, the water quality detecting unit 3 and the heating unit 7 are electrically connected with the main control chip 4; the temperature measuring unit 1 is used for detecting water temperature; the water level detecting unit 2 detects water level based on ultrasonic waves; the main control chip 4 outputs a signal to control the heating unit 7; the heating unit 7 comprises a switching branch and a heating branch; the switching branch controls the heating branch through a relay; and the main control chip 4 can use a common single-chip microcomputer.

[0033] In the embodiment, the temperature measuring unit 1 comprises a temperature measuring chip U1, the model of the temperature measuring chip U1 is DHT11, an output port of the temperature measuring chip U1 is connected with an input port of the main control chip 4, the temperature measuring chip U1 is a temperature and humidity composite sensor containing a calibrated digital signal output, comprises a resistance type humidity sensing element and a negative temperature coefficient NTC temperature measuring element, and is connected with a high-performance 8-bit single-chip microcomputer; the temperature measuring chip U1 converts environmental temperature into a digital signal by measuring resistance value change of a temperature sensor.

[0034] Specifically, the water level detecting unit 2 comprises a distance measuring chip U2, the model of the distance measuring chip U2 is HC-SR04, a trigger port of the distance measuring chip U2 is connected with an output port of the main control chip 4, and an output port of the distance measuring chip U2 is connected with an input port of the main control chip 4; the distance measuring chip U2 is a common ultrasonic distance measuring module; when a high-level pulse of at least 10us is given to the trigger port, an ultrasonic wave transmitter in the distance measuring chip U2 automatically sends 8 ultrasonic wave pulses of 40kHz; the ultrasonic wave propagates in the air, is reflected back after encountering a water surface, a receiver of the distance measuring chip U2 receives the reflected ultrasonic wave, and when the reflected wave is received, an output port outputs a high-level signal; the duration of the high-level signal is proportional to the time of ultrasonic wave back and forth.

[0035] Further, the water quality detection unit 3 comprises a turbidity detection circuit 30, a residual chlorine detection circuit 31 and a pH value detection circuit 32, all of which are electrically connected with the main control chip 4; the turbidity detection circuit 30 adopts an infrared light emitting diode and a photoelectric detector combination, infrared light has strong penetrating property and is suitable for propagation in water, the infrared light emitted by the light emitting diode irradiates the water sample, the suspended particles in the water sample will cause light scattering, and the photoelectric detector will receive the scattered light signal and convert the light signal into an electric signal; the residual chlorine detection circuit 31 adopts a three-electrode system, including a working electrode, a reference electrode and a counter electrode, the working electrode is generally a material selectively responsive to chlorine, such as a gold electrode or a platinum electrode, when the water sample containing residual chlorine contacts the working electrode, the residual chlorine will undergo an oxidation-reduction reaction on the surface of the working electrode, which will generate an electric current, and the current size is proportional to the concentration of residual chlorine in the water sample; the pH value detection circuit 32 usually uses a glass electrode and a reference electrode pair, the glass electrode selectively responds to hydrogen ions, and its potential is related to the hydrogen ion concentration in the water sample.

[0036] It is worth noting that the display unit 5 and the interactive unit 6 are also included, both of which are electrically connected with the main control chip 4, the display unit 5 can use a common LCD display screen to display temperature, water level and water quality information in real time, and the interactive unit 6 contains multiple keys.

[0037] It is worth noting that the switch branch includes a power supply VCC, resistors R1, R2, R3, an indicator lamp L, a triode Q, a diode D and a relay KA, and the heating branch includes a 220V mains, a switch S and a resistor R4, the triode Q is an NPN triode, and when the triode Q base is high level, the relay KA works;

[0038] The first end of the resistor R1 is connected with the output port of the main control chip 4, the second end of the resistor R1 is connected with the triode Q base, the triode Q emitter is grounded, the first end of the resistor R2 is connected with the triode Q base, the second end of the resistor R2 is grounded, the first end of the resistor R3 is connected with the power supply VCC, the second end of the resistor R3 is connected with the first end of the indicator lamp L, the second end of the indicator lamp L is connected with the triode Q collector, the positive electrode of the diode D is connected with the triode Q collector, the negative electrode of the diode D is connected with the power supply VCC, the first end of the relay KA is connected with the power supply VCC, the second end of the relay KA is connected with the triode Q collector, the relay KA is used to control the switch S, and the diode D is a freewheeling diode;

[0039] The first end of the switch S is connected with the 220V mains, and the second end of the switch S is connected with the first end of the heating resistor R4, and the second end of the resistor R4 is connected with the 220V mains.

[0040] The heating module in use, by temperature measuring unit 1 real-time monitoring water temperature, for subsequent heating time to help, users can also be timely, water level detection unit 2 detects water level, prevent the emergence of water level is too low and too high problem, water quality detection unit 3 includes turbidity detection circuit 30, residual chlorine detection circuit 31 and pH detection circuit 32, detect water quality to meet the higher needs of users, heating unit 7 heating time controlled by the main control chip 4, display unit 5 real-time display water temperature, water level and water quality and a variety of data, users through interactive unit 6 change heating time, hot water temperature and other data.

[0041] The basic principle, main features and advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the utility model and are not intended to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A heating module, characterized by: Including temperature measurement unit (1), water level detection unit (2), water quality detection unit (3), main control chip (4) and heating unit (7), the temperature measurement unit (1), the water level detection unit (2), the water quality detection unit (3) and the heating unit (7) are electrically connected with the main control chip (4), the temperature measurement unit (1) is used for detecting water temperature, the water level detection unit (2) is based on ultrasonic wave detection water level, the main control chip (4) output signal controls the heating unit (7), the heating unit (7) includes switch branch and heating branch, switch branch controls heating branch through relay.

2. The heating module of claim 1, wherein: The temperature measurement unit (1) includes temperature measurement chip U1, the model of temperature measurement chip U1 is DHT11, and the output port of temperature measurement chip U1 is connected with the input port of the main control chip (4).

3. The heating module of claim 1, wherein: The water level detection unit (2) includes distance measurement chip U2, the model of distance measurement chip U2 is HC-SR04, the trigger port of distance measurement chip U2 is connected with the output port of the main control chip (4), and the output port of distance measurement chip U2 is connected with the input port of the main control chip (4).

4. The heating module of claim 1, wherein: The water quality detection unit (3) includes turbidity detection circuit (30), residual chlorine detection circuit (31) and pH value detection circuit (32), and the turbidity detection circuit (30), the residual chlorine detection circuit (31) and the pH value detection circuit (32) are electrically connected with the main control chip (4).

5. The heating module of claim 1, wherein: It also includes display unit (5) and interactive unit (6), and the display unit (5) and the interactive unit (6) are electrically connected with the main control chip (4).

6. The heating module of claim 1, wherein: The switch branch includes power supply VCC, resistor R1, resistor R2, resistor R3, indicator lamp L, triode Q, diode D and relay KA, and the heating branch includes 220V mains, switch S and resistor R4. The first end of resistor R1 is connected with the output port of the main control chip (4), the second end of resistor R1 is connected with the base of triode Q, the emitter of triode Q is connected with ground, the first end of resistor R2 is connected with the base of triode Q, the second end of resistor R2 is connected with ground, the first end of resistor R3 is connected with power supply VCC, the second end of resistor R3 is connected with the first end of indicator lamp L, the second end of indicator lamp L is connected with the collector of triode Q, the anode of diode D is connected with the collector of triode Q, the cathode of diode D is connected with power supply VCC, the first end of relay KA is connected with power supply VCC, the second end of relay KA is connected with the collector of triode Q, and the relay KA is used for controlling switch S. The first end of switch S is connected with 220V mains, the second end of switch S is connected with the first end of heating resistor R4, and the second end of resistor R4 is connected with 220V mains.

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