Temperature change detection circuit and water outlet device for water outlet device

Abstract

The present invention discloses a temperature change detection circuit and a water outlet device applied to a water outlet device. The circuit includes: a signal input module, a signal comparison module, and a waveform generation module, wherein: the signal input module is used to receive a heating signal from a heater and transmit the heating signal to the signal comparison module; the waveform generation module is used to detect a target signal; the signal comparison module is used to compare the heating signal with the target signal to obtain a signal comparison result. It can be seen that the implementation of the present invention can detect the temperature change of the heater, so as to protect the normal operation of the electrical appliance based on the temperature change.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent temperature detection, and in particular to a temperature change detection circuit applied to a water outlet device and the water outlet device. Background Art

[0002] With the development of science and technology, people's demand for quality of life is constantly increasing. With the development of society, people's standards and requirements for water use are getting higher and higher. At present, most of the temperature detection circuits in the prior art use NTC thermistors as temperature sensors to detect temperature and control the operation of the equipment based on the detection results. However, this method greatly increases the temperature detection cost of the equipment. It can be seen that it is particularly important to provide a new temperature change detection circuit to reduce the cost of temperature detection. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a temperature change detection circuit and a water outlet device applied to a water outlet device, which can detect the temperature change of the heater, thereby being conducive to protecting the normal operation of the electrical appliance based on the temperature change.

[0004] In order to solve the above technical problems, the first aspect of the present invention discloses a temperature change detection circuit applied to a water outlet device, the circuit comprising:

[0005] Signal input module, signal comparison module, waveform generation module, including:

[0006] The first end of the signal input module is used to electrically connect to the heater, the second end of the signal input module is electrically connected to the first end of the signal comparison module, the first end of the waveform generation module is used to electrically connect to the first target voltage, and the second end of the waveform detection is electrically connected to the second end of the signal comparison module;

[0007] The signal input module is used to receive the heating signal from the heater and transmit the heating signal to the signal comparison module;

[0008] The waveform generation module is used to detect a target signal; wherein the target signal includes a safe heating signal corresponding to the heater;

[0009] The signal comparison module is used to perform a comparison operation on the heating signal and the target signal to obtain a signal comparison result; wherein the signal comparison result includes a temperature difference parameter between the heating signal and the target signal.

[0010] As an optional implementation, in the first aspect of the present invention, the circuit further includes: a control module, wherein:

[0011] The first end of the control module is electrically connected to the third end of the signal comparison module, the second end of the control module is used for grounding, and the third end of the control module is used for connecting to the second target voltage;

[0012] The control module is used to perform a conduction control operation matching the signal comparison result according to the signal comparison result.

[0013] As an optional implementation, in the first aspect of the present invention, the signal input module includes a first amplifier and a detection circuit, wherein:

[0014] The first end of the first amplifier is used to be electrically connected to the heater, the second end of the first amplifier is electrically connected to the first end of the detection circuit, and the second end of the detection circuit is electrically connected to the first end of the signal comparison module;

[0015] Wherein, the first amplifier is used to collect the first heating signal of the heater and transmit the first heating signal to the detection circuit;

[0016] The detection circuit is used to convert the first heating signal of the heating signal into a second heating signal, and transmit the second heating signal to the signal comparison module;

[0017] The signal type of the first heating signal is an analog signal, and the signal type of the second heating signal is a digital signal.

[0018] As an optional implementation, in the first aspect of the present invention, the control module includes a first target transistor, a target optocoupler, and a first resistor, wherein:

[0019] The first end of the first target transistor is electrically connected to the third end of the signal comparison module, the second end of the first target transistor is electrically connected to the first end of the target optocoupler, the third end of the first target transistor is electrically connected to the second end of the detection circuit, the second end of the target optocoupler is electrically connected to the first end of the first resistor, the second end of the first resistor is used for grounding, and the third end of the target optocoupler is used for accessing the second target voltage.

[0020] As an optional implementation, in the first aspect of the present invention, the waveform generation module includes a target chip and a second target transistor, wherein:

[0021] The first end of the target chip is used to electrically connect to the first target voltage, the second end of the target chip is electrically connected to the first end of the second target transistor, the second end of the second target transistor is electrically connected to the second end of the signal comparison module, and the third end of the second target transistor is electrically connected to the third end of the target chip and the fourth end of the target optocoupler, respectively.

[0022] As an optional implementation, in the first aspect of the present invention, the detection circuit includes a first target diode, a first capacitor and a second resistor, wherein:

[0023] The second end of the first amplifier is electrically connected to the first end of the first target diode, the first end of the first capacitor is electrically connected to the second end of the first target diode, the first end of the second resistor and the first end of the signal comparison module, and the second end of the first capacitor is electrically connected to the second end of the second resistor.

[0024] As an optional implementation, in the first aspect of the present invention, the waveform generation module further includes a second capacitor, a third capacitor, and a third resistor, wherein:

[0025] The first end of the second capacitor is electrically connected to the third end of the target chip, the second end of the second capacitor is electrically connected to the fourth end of the target chip, the first end of the third resistor and the first end of the third capacitor, and the second end of the third resistor is electrically connected to the fifth end of the target chip and the second end of the third capacitor.

[0026] As an optional implementation, in the first aspect of the present invention, the signal input module further includes a fourth resistor, a fourth capacitor, a fifth resistor, a fifth capacitor, and a sixth resistor, wherein:

[0027] The first end of the fourth resistor is used to electrically connect to the heater, the second end of the fourth resistor is electrically connected to the first end of the fourth capacitor, the second end of the fourth capacitor is electrically connected to the first end of the fifth resistor, the first end of the fifth capacitor and the first end of the sixth resistor respectively, the second end of the fifth resistor is electrically connected to the second end of the fifth capacitor, and the second end of the sixth resistor is electrically connected to the first end of the first amplifier.

[0028] As an optional implementation, in the first aspect of the present invention, the signal input module further includes a sixth capacitor, wherein:

[0029] The first end of the sixth capacitor is electrically connected to the first end of the signal comparison module, the first end of the first capacitor, and the first end of the second resistor, and the second end of the sixth capacitor is electrically connected to the second end of the first capacitor and the second end of the second resistor.

[0030] A second aspect of the present invention discloses a water outlet device, which includes a temperature change detection circuit as disclosed in any one of the first aspects.

[0031] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0032] In an embodiment of the present invention, a temperature change detection circuit applied to a water outlet device includes: a signal input module, a signal comparison module, and a waveform generation module, wherein: the signal input module is used to receive a heating signal from a heater and transmit the heating signal to the signal comparison module; the waveform generation module is used to detect a target signal; the signal comparison module is used to compare the heating signal with the target signal to obtain a signal comparison result. It can be seen that the implementation of the present invention can detect the temperature change of the heater, thereby being able to protect the normal operation of the electrical appliance based on the temperature change, and can also perform timely processing when the heater has a dry burning phenomenon, which is further conducive to improving the safety of using the heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a structural schematic diagram of a temperature change detection circuit applied to a water outlet device disclosed in an embodiment of the present invention;

[0035] Figure 2 It is a structural schematic diagram of another temperature change detection circuit applied to a water outlet device disclosed in an embodiment of the present invention;

[0036] Figure 3 It is a structural schematic diagram of another temperature change detection circuit applied to a water outlet device disclosed in an embodiment of the present invention;

[0037] Figure 4 It is a structural schematic diagram of another temperature change detection circuit applied to a water outlet device disclosed in an embodiment of the present invention;

[0038] Figure 5 It is a structural schematic diagram of a water outlet device disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the present invention and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, not to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or ends.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] The present invention discloses a temperature change detection circuit applied to a water outlet device, which can detect the temperature change of a heater, thereby protecting the normal operation of the electrical appliance based on the temperature change. The following are detailed descriptions.

[0043] Embodiment 1

[0044] See also Figure 1 , Figure 1 The present invention discloses a temperature change detection circuit for water outlet equipment, which can detect the temperature change of the heater. The detected temperature change can provide a basis for subsequent control operations based on the temperature change to protect the normal operation of the appliance. The present invention discloses a temperature change detection circuit that can be applied to water outlet equipment, wherein the water outlet equipment can be an electrical product such as a coffee machine, a water dispenser, etc. Figure 1 As shown, the temperature change detection circuit includes: a signal input module 101, a signal comparison module 102, and a waveform generation module 103, wherein:

[0045] The first end of the signal input module 101 is used to electrically connect to the heater, the second end of the signal input module 101 is electrically connected to the first end of the signal comparison module 102, the first end of the waveform generation module 103 is used to electrically connect to the first target voltage, and the second end of the waveform generation module 103 is electrically connected to the second end of the signal comparison module 102;

[0046] The signal input module 101 is used to receive a heating signal from the heater and transmit the heating signal to the signal comparison module;

[0047] The waveform generation module 103 is used to detect the target signal; wherein the target signal includes a safety heating signal corresponding to the heater;

[0048] The signal comparison module 102 is used to perform a comparison operation on the heating signal and the target signal to obtain a signal comparison result; wherein the signal comparison result includes a temperature difference parameter between the heating signal and the target signal.

[0049] In the embodiment of the present invention, optionally, the heater may be a heater used in one or more electrical appliances such as a coffee machine, a water dispenser, etc. Further optionally, the number of the heater may be one.

[0050] In the embodiment of the present invention, optionally, the signal comparison result includes a pulse width signal; further, the temperature of the heating device is determined according to the correlation between the pulse width time of the pulse width signal and the temperature corresponding to the target signal. Further, when the signal comparison result is used to indicate that the temperature corresponding to the heating signal is higher than the temperature corresponding to the target signal, the signal comparison result includes a high-level signal; when the signal comparison result is used to indicate that the temperature corresponding to the heating signal is lower than the temperature corresponding to the target signal, the signal comparison result includes a low-level signal.

[0051] In the embodiment of the present invention, optionally, the signal comparison module includes a second amplifier. Figure 3, the second amplifier can be an IC1B amplifier. For example, pin 5 of the second amplifier is the in-phase input terminal, pin 6 of the second amplifier is the inverting input terminal, and the inverting input terminal of the second amplifier is the second terminal and is electrically connected to the waveform generation module, the in-phase input terminal of the second amplifier is the first terminal and is electrically connected to the signal input module, when the signal input module detects the AC signal generated when the heater is heated up, it is transmitted to the second amplifier, and the input signal of pin 5 of IC1B is compared with the target signal of pin 6, when the signal of pin 5 is greater than the signal of pin 6, a signal comparison result is generated, and the signal comparison result is used to indicate that the temperature signal of the heater detected is higher than the temperature signal corresponding to the fixed frequency, and the signal comparison result includes a high-level signal. Furthermore, the target signal received by pin 6 of the second amplifier IC1B is a sawtooth wave signal of a fixed frequency. Furthermore, if the input signal at pin 5 of the second amplifier IC1B is compared with the target signal at pin 6, when the signal at pin 5 is smaller than the signal at pin 6, the generated signal comparison result is used to indicate that the detected temperature signal of the heater is lower than the temperature signal corresponding to the fixed frequency, and the signal comparison result includes a low-level signal, that is, the heater is within a normal and safe temperature operating range.

[0052] It can be seen that implementation Figure 1 The temperature change detection circuit described for use in a water outlet device can collect the heating temperature of the heater through a signal input circuit, and compare the sawtooth wave signal generated by a waveform generation module through a signal comparison module. The heating signal of the heater and the target signal can be collected respectively through different modules, which is beneficial to improving the accuracy of the collected heating temperature of the heater and the accuracy of the collected target signal, thereby facilitating improving the accuracy and reliability of the signal comparison result obtained by the signal comparison module by comparing the collected heating signal with the target signal, and further facilitating improving the accuracy and reliability of temperature change detection.

[0053] In an optional embodiment, if Figure 2 As shown, the circuit further includes: a control module 104, wherein:

[0054] A first terminal of the control module 104 is electrically connected to a third terminal of the signal comparison module 102, a second terminal of the control module 104 is grounded, and a third terminal of the control module 104 is connected to a second target voltage;

[0055] The control module is used to perform a conduction control operation matching the signal comparison result according to the signal comparison result.

[0056] In this optional embodiment, optionally, when the signal comparison result includes a high-level signal, the conduction control operation matching the signal comparison result includes controlling the transistor to conduct, thereby turning on the optocoupler, and the MCU-efast end in the optocoupler detects a high level and forms a PWM waveform. Further, the operating frequency of the heater is controlled by detecting the pulse width time of the MCU-efast signal, thereby effectively protecting the heater from overheating damage caused by dry burning; when the signal comparison result includes a low-level signal, the conduction control operation matching the signal comparison result includes connecting the heater to a temperature change detection circuit or re-detecting the heating signal of the heater. And when the signal comparison result includes a low-level signal, both the transistor and the optocoupler are not turned on.

[0057] It can be seen that the implementation of this optional embodiment can execute a conduction control operation matching the signal comparison result through the control module according to the signal comparison result, and when the signal comparison result includes a high-level signal, it indicates that the temperature corresponding to the heating signal is higher than the temperature corresponding to the target signal, and then the corresponding conduction control operation is executed to reduce the working temperature of the heater. When the signal comparison result includes a low-level signal, it indicates that the temperature corresponding to the heating signal is lower than the temperature corresponding to the target signal, and then there is no need to control the relevant components to conduct. When it is determined that the heating temperature of the heater is too high, the corresponding conduction control operation can be executed to reduce the working temperature of the heater, and the normal operation of the electrical appliance can be protected by detecting the heating temperature change of the heater. Compared with the prior art, there are technical problems such as temperature detection delay or failure in executing the corresponding device protection operation on the heater. The present application can deal with the dry burning phenomenon of the heater in time to prevent circuit short circuit or electrical damage due to dry burning, and reduce the heating temperature of the heater by executing relevant conduction control operations, which is beneficial to reduce the operating temperature of the heater at work, thereby improving the safety of the heater during operation and work.

[0058] In another optional embodiment, Figure 3 As shown, the signal input module 101 includes a first amplifier IC1A and a detection circuit 1011, wherein:

[0059] The first end of the first amplifier IC1A is used to be electrically connected to the heater, the second end of the first amplifier IC1A is electrically connected to the first end of the detection circuit 1011, and the second end of the detection circuit 1011 is electrically connected to the first end of the signal comparison module 102;

[0060] The first amplifier IC1A is used to collect the first heating signal of the heater and transmit the first heating signal to the detection circuit 1011;

[0061] The detection circuit 1011 is used to convert the first heating signal of the heating signal into a second heating signal, and transmit the second heating signal to the signal comparison module 102;

[0062] The signal type of the first heating signal is an analog signal, and the signal type of the second heating signal is a digital signal.

[0063] In this optional embodiment, optionally, when the heater is operating and heating up, an AC signal is generated, and the AC signal, which is an analog signal type, is converted into a digital signal through a first amplifier and a detection circuit, and after the conversion, is input into the second amplifier of the signal comparison module, and is compared with the sawtooth wave signal in the target signal input into the signal comparison module to obtain a signal comparison result.

[0064] In this optional embodiment, optionally, the detection circuit can detect the modulated signal from the modulated signal, so the purpose of demodulation is to recover the modulated signal.

[0065] It can be seen that the implementation of this optional embodiment can collect the first heating signal of the heater through the first amplifier and transmit it to the detection circuit, and convert the collected first heating signal into a second heating signal of digital signal type through the detection circuit, and can modulate and restore the signal, which is beneficial to improving the accuracy and reliability of collecting the heating signal of the heater, and is beneficial to improving the accuracy and reliability of obtaining the second heating signal, thereby facilitating improving the accuracy and reliability of the signal comparison result obtained by the subsequent signal comparison module based on the digital type of heating signal, and further facilitating improving the accuracy and reliability of detecting the temperature change of the heater, and further facilitating timely processing when dry burning occurs in the heater, to prevent circuit short circuit or electrical damage due to dry burning, etc., which is beneficial to improving the safety of the heater during operation and work.

[0066] In yet another optional embodiment, Figure 3 As shown, the control module 104 includes a first target transistor Q8, a target optical coupler U2, and a first resistor R61, wherein:

[0067] The first end of the first target transistor Q8 is electrically connected to the third end of the signal comparison module 102, the second end of the first target transistor Q8 is electrically connected to the first end of the target optocoupler U2, the third end of the first target transistor Q8 is electrically connected to the second end of the detection circuit 1011, the second end of the target optocoupler U2 is electrically connected to the first end of the first resistor R61, the second end of the first resistor R61 is used for grounding, and the third end of the target optocoupler U2 is used for accessing the second target voltage.

[0068] In this optional embodiment, the first resistor is optionally a pull-down resistor, wherein the pull-down resistor is used to connect an uncertain signal to the ground GND through a resistor and fix it at a low level, and its function is to pull down to output current from the device to ensure that the pin is normally at a low level. In this way, the low level can be ensured by the first pull-down resistor, and the safety and intelligence of the operation of the component can be achieved.

[0069] In this optional embodiment, optionally, the second target voltage is used to perform a corresponding power supply operation for the target optocoupler.

[0070] In this optional embodiment, optionally, when the signal comparison result includes a high-level signal, the conduction control operation matching the signal comparison result includes controlling the first target transistor to conduct, thereby turning on the target optocoupler, thereby reducing the operating temperature of the heater; when the signal comparison result includes a low-level signal, both the first target transistor and the target optocoupler are not turned on.

[0071] It can be seen that the implementation of this optional embodiment can reduce the operating temperature of the heater by comparing the signal results transmitted by the signal comparison module and performing corresponding conduction operations through the first target transistor and the target optocoupler, and can better realize the intelligence of performing corresponding conduction operations and cooling operations when abnormal temperature changes of the heater are detected through the coordinated conduction effect of the first target transistor and the target optocoupler, which is further conducive to improving the safety of the operation of the heater.

[0072] In yet another optional embodiment, Figure 3 As shown, the waveform generation module 103 includes a target chip U3 and a second target transistor Q7, wherein:

[0073] The first end of the target chip U3 is used to electrically connect to the first target voltage, the second end of the target chip U2 is electrically connected to the first end of the second target transistor Q7, the second end of the second target transistor Q7 is electrically connected to the second end of the signal comparison module 102, and the third end of the second target transistor Q7 is electrically connected to the third end of the target chip U3 and the fourth end of the target optocoupler U2 respectively.

[0074] In this optional embodiment, optionally, the target chip includes a 555 chip, wherein the 555 chip is NE555 (Timer IC), which is an 8-pin time base integrated circuit. NE555 has small size, light weight, stable and reliable, large operating power supply range, strong current supply capacity at the output end, high timing accuracy, and good temperature stability.

[0075] In this optional embodiment, the first target voltage is optionally used to perform a corresponding power supply operation for the target chip. Further, for example, a sawtooth wave signal can be generated by the target chip and the second target transistor, wherein the sawtooth wave signal is the target signal.

[0076] It can be seen that the implementation of this optional embodiment can power the target chip through the first target voltage, and detect the target signal of the safety heating signal corresponding to the heater through the target chip and the second target transistor, which is conducive to improving the accuracy and reliability of detecting the target signal, and is conducive to improving the intelligence of detecting the target signal, thereby facilitating improving the accuracy and reliability of the signal comparison result obtained by the subsequent signal comparison module performing comparison operations on the target signal and the heating signal, and is conducive to improving the accuracy and reliability of the subsequent corresponding operations based on the signal comparison results. Furthermore, when the heater has a dry burning phenomenon, it can be handled in time to prevent circuit short circuit or electrical damage due to dry burning, which is conducive to improving the safety of the heater during operation and work, and is conducive to further improving the safety of the heater operation.

[0077] In yet another optional embodiment, Figure 3 As shown, the detection circuit 1011 includes a first target diode D4, a first capacitor C28 and a second resistor R69, wherein:

[0078] The second end of the first amplifier IC1A is electrically connected to the first end of the first target diode D4, the first end of the first capacitor C28 is electrically connected to the second end of the first target diode D4, the first end of the second resistor R69 and the first end of the signal comparison module 102, and the second end of the first capacitor C28 is electrically connected to the second end of the second resistor R69.

[0079] In this optional embodiment, the detection in the detection circuit refers to the process of detecting the modulated signal from the modulated signal. Therefore, the purpose of demodulation is to restore the modulated signal. For demodulation, the amplitude modulated wave and the carrier wave can be multiplied and then filtered through a low-pass filter to obtain the detected signal.

[0080] In this optional embodiment, optionally, the AC signal generated when the heater is working and heating up is input to the first amplifier, and the analog signal is converted into a digital signal through the detection circuit composed of the first amplifier, the first target diode, the first capacitor and the second resistor, and input to pin 5 of the signal comparison module, and compared with the sawtooth wave signal in pin 6 of the signal comparison module, and the signal comparison result is generated by the signal comparison module.

[0081] It can be seen that the implementation of this optional embodiment can convert the analog signal into a digital signal through the detection circuit composed of the first target diode, the first capacitor and the second resistor, and in cooperation with the first amplifier signal, the heating signal generated when the heater is heated up during operation. The digital signal can be input into the signal comparison module and the corresponding comparison operation can be performed through the signal comparison module, which is beneficial to improving the accuracy and reliability of the heating signal detected, and is beneficial to improving the accuracy and reliability of the signal comparison results obtained by the subsequent signal comparison module performing the comparison operation, and is further beneficial to better realize the intelligence of performing the corresponding conduction operation and cooling operation when the temperature change of the heater is detected to be abnormal, which is further beneficial to improving the safety of the operation of the heater.

[0082] In yet another optional embodiment, Figure 3 As shown, the waveform generating module 103 further includes a second capacitor C22, a third capacitor C23, and a third resistor R60, wherein:

[0083] The first end of the second capacitor C22 is electrically connected to the third end of the target chip U3, the second end of the second capacitor C22 is electrically connected to the fourth end of the target chip U4, the first end of the third resistor R60 and the first end of the third capacitor C23, and the second end of the third resistor R60 is electrically connected to the fifth end of the target chip U3 and the second end of the third capacitor C23.

[0084] In this optional embodiment, the second capacitor and the third capacitor are chip filter capacitors, wherein the second capacitor and the third capacitor are used to perform corresponding filtering operations on the target chip. Optionally, the third resistor is a charge and discharge threshold resistor, which is used to provide charge and discharge threshold parameters for the target chip.

[0085] In this optional embodiment, optionally, the target chip is a 555 chip, which cooperates with the second capacitor, the third capacitor, the third resistor and the second target transistor of the peripheral circuit to perform charging and discharging operations to generate a sawtooth wave signal with a fixed waveform. The sawtooth wave signal with a fixed waveform can be generated based on the target chip, the second capacitor, the third capacitor, the third resistor and the second target transistor, which is beneficial to improving the accuracy and reliability of the generated sawtooth wave signal, and is beneficial to improving the intelligence of the generated sawtooth wave signal.

[0086] It can be seen that the implementation of this optional embodiment can generate a sawtooth wave signal with a fixed waveform through the target chip in cooperation with the second capacitor, the third capacitor, the third resistor and the second target transistor in the peripheral circuit, which is beneficial to improving the accuracy and reliability of the generated sawtooth wave signal, and is beneficial to improving the intelligence of the generated sawtooth wave signal, thereby facilitating the subsequent signal comparison module to generate a target signal based on the sawtooth wave signal with a fixed waveform, and performing corresponding comparison operations on the target signal and the heating signal to obtain the accuracy and reliability of the signal comparison result, and is beneficial to better realize the intelligence of performing corresponding conduction operations and cooling operations when the signal comparison result is detected to indicate that the temperature change of the heater is abnormal, which is further beneficial to improving the safety of the operation of the heater.

[0087] In yet another optional embodiment, Figure 3 As shown, the signal input module 101 further includes a fourth resistor R65, a fourth capacitor C24, a fifth resistor R68, a fifth capacitor C27, and a sixth resistor R66, wherein:

[0088] The first end of the fourth resistor R65 is used to electrically connect to the heater, the second end of the fourth resistor R65 is electrically connected to the first end of the fourth capacitor C24, the second end of the fourth capacitor C24 is electrically connected to the first end of the fifth resistor R68, the first end of the fifth capacitor C27 and the first end of the sixth resistor R66 respectively, the second end of the fifth resistor R68 is electrically connected to the second end of the fifth capacitor C27, and the second end of the sixth resistor R66 is electrically connected to the first end of the first amplifier IC1A.

[0089] In this optional embodiment, the fourth resistor and the fifth resistor are voltage-dividing resistors, the fourth capacitor and the fifth capacitor are filter capacitors, and the sixth resistor is a current-limiting resistor. The fourth resistor and the fifth resistor can realize the functions of voltage measurement, signal adjustment and voltage protection, and the voltage-dividing resistor is used to adjust and distribute the voltage so that each part of the circuit can work normally and meet specific requirements; the fourth capacitor and the fifth capacitor can be used to filter out the AC component in the power rectifier circuit to make the output DC smoother; the sixth resistor can reduce the load-end current, and the current-limiting resistor can be used to limit the size of the branch current to prevent excessive current from burning the components connected in series.

[0090] In this optional embodiment, further optionally, the first section of the fourth resistor is electrically connected to the E-fast1 and ACN input of the heater, and based on the action of the first amplifier and the detection circuit, it is input to the signal comparison module and compared with the sawtooth wave signal to control the change in the length of the conduction time of the first target transistor and the target optocoupler, thereby reducing the operating temperature and heating temperature of the heater. Furthermore, the positive pulse width time of the efast signal increases as the temperature of the heater rises, and conversely, the positive pulse width time of the efast signal decreases as the temperature of the heater drops. When the heater is not heated (cold), the efast signal is a low-level signal due to the R61 pull-down resistor. When the temperature is lower than the preset protection value, the efast signal corresponds to the positive pulse width time T0, controls the heater to work at full power P0 and the operating frequency of the water pump is fo, and when the temperature reaches the preset protection value, the efast signal corresponds to the positive pulse width time T1, controls the heater power P0 / 2 and the operating frequency of the water pump is 2fo.

[0091] It can be seen that the implementation of this optional embodiment can perform voltage division through the fourth resistor and the fifth resistor, perform filtering through the fourth capacitor and the fifth capacitor, and perform current limiting through the sixth resistor. The coordinated operation between the multiple electronic components enables each part of the circuit to work normally and meet the specific needs of the work, and can prevent the situation where the components connected in series are burned out when the current in the loop is too large, which is beneficial to improving the safety of the temperature change detection circuit during operation, and is beneficial to protecting the normal operation and safe operation of each component, which is beneficial to further improving the safety of the heater operation.

[0092] In yet another optional embodiment, Figure 3 As shown, the signal input module 101 further includes a sixth capacitor C26, wherein:

[0093] The first end of the sixth capacitor C26 is electrically connected to the first end of the signal comparison module 102, the first end of the first capacitor C28, and the first end of the second resistor R69. The second end of the sixth capacitor C26 is electrically connected to the second end of the first capacitor C28 and the second end of the second resistor R69.

[0094] In this optional embodiment, optionally, the sixth capacitor is a sawtooth wave charging and discharging capacitor, wherein the target chip cooperates with the second capacitor, the third capacitor, the third resistor and the second target transistor in the peripheral circuit to perform corresponding charging and discharging operations on the sixth capacitor to generate a sawtooth wave signal with a fixed waveform.

[0095] In this optional embodiment, optionally, the sixth capacitor is a charging and discharging capacitor, wherein in the positive half cycle of the voltage, it is charged and current flows through the circuit, and in the negative half cycle of the voltage, the capacitor is discharged and current flows through the circuit again, thereby realizing the function of the capacitor to pass AC and block DC. By utilizing the charging and discharging function of the capacitor, oscillation circuits, filtering circuits, differential circuits, integration circuits, etc. can be produced.

[0096] It can be seen that the implementation of this optional embodiment can perform corresponding charging and discharging operations on the sixth capacitor based on the sawtooth wave charging and discharging capacitor, the sixth capacitor, in cooperation with the target chip and the second capacitor, the third capacitor, the third resistor and the second target transistor to generate a sawtooth wave signal with a fixed waveform, which is beneficial to improving the accuracy and reliability of the generated sawtooth wave signal, and is beneficial to improving the accuracy and reliability of the signal comparison result obtained by the subsequent signal comparison module based on the target signal corresponding to the generated sawtooth wave signal with a fixed waveform and the heating signal, thereby helping to improve the accuracy and reliability of the temperature detection of the heater, and is beneficial to better realize the intelligence of performing corresponding conduction operations and cooling operations when the signal comparison results are detected to indicate abnormal temperature changes of the heater, which is further beneficial to improving the safety of the operation of the heater.

[0097] In yet another optional embodiment, Figure 4 As shown, the temperature change detection circuit also includes a diode D5, a capacitor C30, a capacitor C25, a capacitor C29, a resistor R67, a resistor R64, a resistor R59, a resistor R62, a resistor R58, a resistor R63, a resistor R32, and a capacitor C12; wherein the capacitor C30, the capacitor C25, and the capacitor C12 are filter capacitors; the resistor R67 and the resistor R64 are voltage-dividing resistors; the resistor R58, the resistor R59, and the resistor R62 are used to cooperate with the target chip to perform a charge and discharge adjustment sawtooth waveform; the resistor R63 and the resistor R32 are current-limiting resistors.

[0098] It can be seen that the implementation of this optional embodiment can perform corresponding voltage division operations, current limiting operations and filtering operations through the components included in the temperature change detection circuit, can improve the accuracy and reliability of temperature detection of the heater through the synergy between multiple devices, and can realize temperature change detection based on the synergy between multiple devices, thereby saving the manufacturing cost of the temperature change detection circuit, improving the intelligence and efficiency of temperature change detection of the heater, and facilitating the improvement of the convenience of temperature change detection of the heater, thereby facilitating the improvement of the intelligence of performing corresponding conduction operations and cooling operations when the signal comparison results are detected to indicate abnormal temperature changes of the heater, and further facilitating the improvement of the safety of the operation of the heater.

[0099] Embodiment 2

[0100] The embodiment of the present invention discloses a water outlet device, which includes the temperature change detection circuit described in the first embodiment.

[0101] The above is a detailed introduction to a temperature change detection circuit and a water outlet device applied to a water outlet device disclosed in an embodiment of the present invention. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present invention, but the above preferred embodiments are not used to limit the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for a person skilled in the art, based on the idea of ​​the present invention, without departing from the spirit and scope of the present invention, there will be changes in the specific implementation methods and application scopes. Therefore, the scope of protection of the present invention is defined by the claims.

[0102] The above is a detailed introduction to a temperature change detection circuit used for a water outlet device in an electronic device disclosed in an embodiment of the present invention. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present invention, but the above preferred embodiments are not used to limit the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for a person skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is defined by the claims.

Claims

1. A temperature change detection circuit applied to a water outlet device, characterized in that: The circuit includes a signal input module, a signal comparison module, and a waveform generation module, wherein: The first end of the signal input module is used to electrically connect to the heater, the second end of the signal input module is electrically connected to the first end of the signal comparison module, the first end of the waveform generation module is used to electrically connect to the first target voltage, and the second end of the waveform generation module is electrically connected to the second end of the signal comparison module; The signal input module is used to receive the heating signal from the heater and transmit the heating signal to the signal comparison module; The waveform generating module is used to generate a target signal, wherein the target signal is a sawtooth wave signal with a fixed frequency; The signal comparison module is used to perform a comparison operation on the heating signal and the target signal to obtain a signal comparison result; The circuit further comprises: a control module, wherein: The first end of the control module is electrically connected to the third end of the signal comparison module, the second end of the control module is used for grounding, and the third end of the control module is used for connecting to the second target voltage; The control module is used to perform a conduction control operation matching the signal comparison result according to the signal comparison result; Wherein, the control module includes a first target transistor, a target optocoupler and a first resistor, wherein: the first end of the first target transistor is electrically connected to the third end of the signal comparison module, the second end of the first target transistor is electrically connected to the first end of the target optocoupler, the third end of the first target transistor is electrically connected to the second end of the detection circuit included in the signal input module, the second end of the target optocoupler is electrically connected to the first end of the first resistor, the second end of the first resistor is used for grounding, and the third end of the target optocoupler is used for connecting to the second target voltage; When the signal comparison result includes a high-level signal indicating that the temperature corresponding to the heating signal is higher than the temperature corresponding to the target signal, the conduction control operation matching the signal comparison result includes controlling the first target transistor and the target optocoupler to be turned on, and the target optocoupler forms a PWM waveform according to the detected high-level signal.

2. The temperature change detection circuit for water outlet equipment according to claim 1, characterized in that: The signal input module further includes a first amplifier, wherein: The first end of the first amplifier is used to be electrically connected to the heater, the second end of the first amplifier is electrically connected to the first end of the detection circuit, and the second end of the detection circuit is electrically connected to the first end of the signal comparison module; Wherein, the first amplifier is used to collect the first heating signal of the heater and transmit the first heating signal to the detection circuit; The detection circuit is used to convert the first heating signal of the heating signal into a second heating signal, and transmit the second heating signal to the signal comparison module; The signal type of the first heating signal is an analog signal, and the signal type of the second heating signal is a digital signal.

3. The temperature change detection circuit for water outlet equipment according to claim 2, characterized in that: The waveform generation module includes a target chip and a second target triode, wherein: The first end of the target chip is used to electrically connect to the first target voltage, the second end of the target chip is electrically connected to the first end of the second target transistor, the second end of the second target transistor is electrically connected to the second end of the signal comparison module, and the third end of the second target transistor is electrically connected to the third end of the target chip and the fourth end of the target optocoupler, respectively.

4. The temperature change detection circuit for water outlet equipment according to claim 2, characterized in that: The detection circuit comprises a first target diode, a first capacitor and a second resistor, wherein: The second end of the first amplifier is electrically connected to the first end of the first target diode, the first end of the first capacitor is electrically connected to the second end of the first target diode, the first end of the second resistor and the first end of the signal comparison module, and the second end of the first capacitor is electrically connected to the second end of the second resistor.

5. The temperature change detection circuit applied to water outlet equipment according to claim 3, characterized in that: The waveform generation module further includes a second capacitor, a third capacitor, and a third resistor, wherein: The first end of the second capacitor is electrically connected to the third end of the target chip, the second end of the second capacitor is electrically connected to the fourth end of the target chip, the first end of the third resistor and the first end of the third capacitor, and the second end of the third resistor is electrically connected to the fifth end of the target chip and the second end of the third capacitor.

6. The temperature change detection circuit applied to water outlet equipment according to claim 4, characterized in that: The signal input module further includes a fourth resistor, a fourth capacitor, a fifth resistor, a fifth capacitor, and a sixth resistor, wherein: The first end of the fourth resistor is used to electrically connect to the heater, the second end of the fourth resistor is electrically connected to the first end of the fourth capacitor, the second end of the fourth capacitor is electrically connected to the first end of the fifth resistor, the first end of the fifth capacitor and the first end of the sixth resistor respectively, the second end of the fifth resistor is electrically connected to the second end of the fifth capacitor, and the second end of the sixth resistor is electrically connected to the first end of the first amplifier.

7. The temperature change detection circuit for water outlet equipment according to claim 6, characterized in that: The signal input module further includes a sixth capacitor, wherein: The first end of the sixth capacitor is electrically connected to the first end of the signal comparison module, the first end of the first capacitor, and the first end of the second resistor, and the second end of the sixth capacitor is electrically connected to the second end of the first capacitor and the second end of the second resistor.

8. A water outlet device, characterized in that: The water outlet device comprises a temperature change detection circuit as described in any one of claims 1-7.

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