CN218818538U

CN218818538U - Heating faucet and waterway system

Info

Publication number: CN218818538U
Application number: CN202223392896.1U
Authority: CN
Inventors: 成吉会
Original assignee: Zhejiang Supor Kitchen and Bathroom Electrical Appliance Co Ltd
Current assignee: Zhejiang Supor Kitchen and Bathroom Electrical Appliance Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-07
Anticipated expiration: 2032-11-30

Abstract

The utility model provides a heating tap and waterway system. The heating faucet includes: the heating cavity is connected with a water flow channel; the heater is arranged in the heating cavity or around the heating cavity; the probe of the differential pressure sensor is positioned in the heating cavity and/or the water flow channel, the probe of the differential pressure sensor is lower than the top of the heater, and the differential pressure sensor is used for generating a differential pressure signal according to the current liquid level height in the heating cavity; and the controller is electrically connected to the heater and the differential pressure sensor, and is used for responding to a user water taking operation and turning on the heater when the current liquid level height is determined to be higher than or equal to the preset liquid level height according to the differential pressure signal. The liquid level in the heating cavity is detected by arranging the differential pressure sensor in the heating faucet, and the device is simple in structure, high in precision and strong in use stability.

Description

Heating faucet and waterway system

Technical Field

The utility model relates to a technical field of aqueous cleaning specifically, relates to a heating tap and waterway system.

Background

Along with the improvement of living standard, the instant heating type water purifier is accepted by more and more people due to the advantages of high hot water outlet speed, convenient use and the like.

The existing instant heating type water dispenser is mostly provided with a heating faucet. A heating cavity and a heater are arranged in the heating faucet. The water flow through the heating chamber will be heated by the heater. Wherein, in order to prevent the heater from dry burning, a liquid level sensor is usually arranged in the heating cavity. The liquid level sensor may detect the level of liquid in the heating chamber.

Level sensor's a lot of kind, some level sensor have the float, and drive mechanism is complicated, sets up in heating tap, can make heating tap bulky, and some level sensor have the water level probe, but its testing result is unstable, and has the requirement to the type of liquid.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems of the prior art, according to one aspect of the present invention, a heating faucet is provided. The heating faucet includes: the heating cavity is connected with a water flow channel; the heater is arranged in the heating cavity or around the heating cavity; the probe of the differential pressure sensor is positioned in the heating cavity and/or the water flow channel, the probe of the differential pressure sensor is lower than the top of the heater, and the differential pressure sensor is used for generating a differential pressure signal according to the current liquid level height in the heating cavity; and the controller is electrically connected with the heater and the differential pressure sensor, and is used for responding to the operation of taking water by a user and turning on the heater when the current liquid level height is determined to be higher than or equal to the preset liquid level height according to the differential pressure signal.

Compared with the existing liquid level sensor with a floater, the differential pressure sensor can detect the liquid level without a transmission mechanism such as the floater, so that the structure of the heating faucet can be relatively simple, and compared with the liquid level sensor with a probe, the stability of the probe in the using process is poor, and the detection result of the probe can also be different according to the difference of the detected water quality. According to the utility model discloses heating tap who provides detects the liquid level of heating intracavity through differential pressure sensor, its simple structure, and the precision is high, and the stability in use is strong, more is applicable to the setting in this heating tap.

Illustratively, the bottom of the heating chamber is connected to a water flow path, with which the heating chamber forms a communication. This setting can be connected heating chamber and rivers passageway and form the return bend, reduces because of the dry combustion method probability that the rivers loss in the heating chamber takes place. In addition, the effect of linker can make the heating chamber keep unanimous with the liquid level in the rivers passageway to can make and install differential pressure sensor in the rivers passageway also can detect the liquid level in the heating chamber, like this, can enlarge differential pressure sensor's installation scope, make differential pressure sensor can carry out nimble setting to the position according to the in-service use condition.

Illustratively, the differential pressure sensor is disposed at the bottom of the communicator. The distance from the bottom to the top of the heater is relatively increased, so that the measuring range detected by the differential pressure sensor is also larger, and thus, a more accurate liquid level height value can be obtained through the differential pressure sensor.

Illustratively, the heating tap comprises a first vertical pipe, a second vertical pipe and a transverse pipe, wherein two ends of the transverse pipe are respectively connected with the bottom of the first vertical pipe and the bottom of the second vertical pipe through joints, the first vertical pipe forms a heating cavity, the second vertical pipe and the transverse pipe form a water flow passage, and the differential pressure sensor is arranged on the transverse pipe. On the one hand, install differential pressure sensor on horizontal pipe, can increase the distance at differential pressure sensor and heater top, expand the range scope, improve measurement accuracy, on the other hand, differential pressure sensor can be by supreme bottom of installing at horizontal pipe down, like this, can make to reduce the size of heating tap in horizontal side, makes the heating tap appearance more fine, and the user of being convenient for will heat the tap and install to the narrow and small position in space.

Illustratively, the end of the transverse tube is fitted with a temperature sensor, the probe of which extends into the transverse tube. Through setting up differential pressure sensor and temperature sensor on horizontal pipe, can improve heating tap's integrated level for heating tap's size is more small and exquisite, is convenient for install and use.

Illustratively, the heating faucet further comprises a water inlet passage and a water outlet passage, the water inlet passage is communicated between the bottom of the heating cavity and the water inlet end of the heating faucet, and the water outlet passage is communicated between the top of the heating cavity and the water outlet end of the heating faucet. Through this setting, rivers can hold into the heating chamber from the bottom in heating chamber gradually when getting into the heating chamber in-process to make the liquid level of heating intracavity rise steadily, like this, to the liquid level that detects the heating intracavity, because do not have rivers impact, so the testing result is more accurate.

Illustratively, the water inlet passage and the water outlet passage are located at the periphery of the heating chamber and the heater. The rivers temperature in the inhalant canal is lower, at the heater heating in-process, can absorb the heat that the heater diffuses out for improve its intraductal temperature, reach the effect of preheating, thereby improve the rate of heating in the heating chamber, in addition, inhalant canal can also be through the heat absorption to the heater diffusion out, and the heat of avoiding the heater to produce causes the damage to other devices in the heating tap, plays the effect of cooling. The water outlet channel is arranged around the heating cavity and the heater, so that heat dissipated by the heater can keep the water in the water outlet channel warm, and the temperature of the water in the water outlet channel is prevented from being reduced in the flowing process.

Illustratively, the water inlet channel is provided with a water inlet electromagnetic valve electrically connected with a controller, and the controller is used for controlling the water inlet electromagnetic valve to close in response to the user stopping the water taking operation. Therefore, the water flow in the heating cavity can be prevented from flowing back from the water inlet channel, and the condition of dry burning of the heater is avoided.

Illustratively, the heating faucet further comprises a prompting device electrically connected with the controller, and the controller is used for controlling the prompting device to give out a prompt when the current liquid level is determined to be lower than the preset liquid level according to the differential pressure signal and responding to the water taking operation of the user. The prompting device can give out a prompt to inform a user that the liquid level in the heater is too low, and the heater is not started, so that the use safety is improved

According to another aspect of the utility model, still provide a waterway system. The water circuit system comprises a water purifier and any one of the heating faucets, and the heating faucet is connected to the water purifier.

Illustratively, the water purifier includes a water supply electrically connected to the controller, the controller further being configured to control an outflow of water from the water supply in response to a user water intake operation and in accordance with the differential pressure signal. The waterway system with the setting can have more realizable functions and improve the use experience of users.

A series of concepts in a simplified form are introduced in the context of the present invention, which will be described in further detail in the detailed description section. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings there is shown in the drawings,

FIG. 1 is a schematic view of a heating faucet according to an exemplary embodiment of the present invention;

fig. 2a and 2b are schematic water paths of a heating faucet according to various exemplary embodiments of the present invention;

and

fig. 3 is a schematic view of a waterway system in accordance with an exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. 10', 10", heating taps; 20. a water purifier; 101. a water inlet end; 102. a water outlet end; 100. a heating chamber; 110. a first vertical tube; 200. a water flow channel; 210. a second vertical tube; 220. a transverse tube; 400. a differential pressure sensor; 500. a temperature sensor; 600. a water inlet electromagnetic valve; 710. a water inlet channel; 720. and a water outlet channel.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

According to one aspect of the present invention, a heating faucet 10 is provided, as shown in fig. 1, 2a and 2 b. The heating faucet may include: a heating chamber 100, a heater (not shown), a differential pressure sensor 400, and a controller.

The heating chamber 100 may be a cavity of any shape, and in the embodiment shown in fig. 1, the heating chamber 100 may be a vertically disposed cylinder. A water flow passage 200 may be connected to the heating chamber 100. The water flow passage 200 can be used to store water into the heating chamber 100. There are many situations where the water flow passage 200 is connected to the heating chamber 100, in some embodiments the water flow passage 200 may be connected to the top of the heating chamber 100 as shown in figure 2a, and in other embodiments the water flow passage 200 may also be connected to the bottom of the heating chamber 100 as shown in figure 2 b. Of course, the water flow passage 200 may be connected to the middle portion or any position of the heating chamber 100. The water flow passage 200 may be a water pipe structure, and is not particularly limited. In short, the water flow channel 200 may be sufficient to store water for the heating chamber 100.

The heater may be disposed within the heating chamber 100 or disposed around the heating chamber 100. The heater provided in the heating chamber 100 may be immersed in the water in the heating chamber 100 and directly heat the water in the heating chamber 100. A heater disposed around the heating chamber 100 may be disposed around the heating chamber 100 to heat water in the heating chamber 100 by heat transfer or heat radiation. The heater may be one or more of a resistive heater, an electromagnetic heater, or a membrane heater.

Differential pressure sensor 400 can be used to detect the liquid level height. The differential pressure sensor 400 may be a detector that converts a static pressure into an electric signal through a pressure detecting element based on the principle that the static pressure of a liquid is proportional to the height of the liquid. Typically, the differential pressure sensor 400 has a probe that may be located in one or more of the heating chamber 100 and the water flow passage 200. The probe may be positioned at a height below the top of the heater. This is because the differential pressure sensor 400 can detect a liquid level above the height of the probe, and if the liquid level is above the top of the heater, the heater can be considered to be not dry-burned. The differential pressure sensor 400 can be used to generate a differential pressure signal based on the current liquid level within the heating chamber 100. The differential pressure signal may be directly proportional to the liquid level height. The differential pressure signal may be output in the form of a current or a voltage.

Of course, it will be appreciated that the differential pressure sensor 400 could also be located above the top of the heater, and that the differential pressure sensor 400 would only detect the liquid level after the liquid level is above the top of the heater in the heating chamber.

In the embodiment shown in fig. 2a, the probe of the differential pressure sensor 400 may be located within the heating chamber 100. In the embodiment shown in fig. 2b, the probe of the differential pressure sensor 400 may then be located within the heating chamber 100 or the water flow passage 200. The differential pressure sensor 400 in the above embodiments can detect the liquid level in the heating chamber 100, and the user can select the liquid level according to the actual use requirement.

The controller may be electrically connected to the heater and differential pressure sensor 400. The controller may determine a current liquid level height based on the differential pressure signal. The controller may also turn on the heater when the current liquid level is greater than or equal to a preset liquid level height in response to a user water-fetching operation. The user's water fetching operation can be performed through a key, a knob, a touch screen, and other devices, without specific limitations. The water getting operation of the user can comprise real-time operation and delay operation. By taking the user to carry out the water taking operation through the key as an example, the user can carry out the water taking operation when pressing the key, and the water taking operation is finished when loosening the key, and the user can also carry out the water taking operation with a preset amount or a preset duration after pressing the key, and when the preset amount or the preset duration reaches, the water taking operation is finished, and the inventor can select according to the actual use requirement.

In principle, although the differential pressure sensor is the same as the pressure sensor and can detect the pressure at the position of the differential pressure sensor, the pressure sensor is used for detecting the pressure in the closed pipeline, and if the pipeline is communicated with the atmosphere, the pressure detected by the pressure sensor is zero. The differential pressure sensor can generate different electric signals according to different depths in the liquid in which the differential pressure sensor is positioned, and the signals are irrelevant to whether the pipeline in which the differential pressure sensor is positioned is closed or whether the pipeline in which the differential pressure sensor is positioned is full of liquid. In a water dispenser, when water stops being taken, the heating cavity 100 in the heating faucet is usually unpressurized and is communicated with the atmosphere, so the differential pressure sensor is more suitable for the heating faucet in the water dispenser. In addition, the differential pressure sensor has higher detection precision, can reflect the tiny change of the pressure through an electric signal, and can be used for detecting the height of the liquid level.

Compared with the existing liquid level sensor with a floater, the differential pressure sensor 400 can detect the liquid level without a transmission mechanism such as the floater, so that the structure of the heating faucet can be relatively simple, and compared with the liquid level sensor with a probe, the stability of the probe in the using process is poor, and the detection result of the probe can also be different according to the difference of the detected water quality. According to the utility model provides a heating tap detects the liquid level in heating chamber 100 through differential pressure sensor, its simple structure, and the precision is high, and the stability in use is strong, more is applicable to the setting in this heating tap.

Illustratively, the heating chamber 100 and the water flow passage 200 may be connected as a communicating vessel, as shown in fig. 1. The communicating means is used to form a trap after the heating chamber 100 is connected to the water flow passage 200, thereby reducing the dry burning probability caused by the water flow loss in the heating chamber 100. In addition, the heating cavity 100 and the water flow channel 200 are connected to form a communicating device, so that the liquid levels in the heating cavity 100 and the water flow channel 200 can be kept consistent, the differential pressure sensor 400 can be installed in the water flow channel 200 and also can detect the liquid level in the heating cavity 100, the installation range of the differential pressure sensor 400 can be enlarged, and the differential pressure sensor can be flexibly arranged according to the actual use condition.

Illustratively, the differential pressure sensor 400 may be disposed at the bottom of the communicator. The distance from the bottom to the top of the heater is relatively increased, so the measuring range detected by the differential pressure sensor 300 is larger, and thus, a more accurate liquid level height value can be obtained through the differential pressure sensor 300.

Illustratively, the heating faucet may include a first vertical tube 110, a second vertical tube 210, and a transverse tube 220. Both ends of the transverse tube 220 may be connected to the bottom of the first vertical tube 110 and the bottom of the second vertical tube 210, respectively, by joints. The first vertical tube 110 may form the heating chamber 100. The second vertical pipe 210 and the lateral pipe 220 may form the water flow passage 200. Differential pressure sensor 400 may be mounted on cross tube 220. The first vertical pipe 110 and the second vertical pipe 210 may extend in a vertical direction. Of course, the first vertical pipe 110 and the second vertical pipe 210 may also be disposed in a direction that is at less than a right angle to the vertical direction. On the one hand, install differential pressure sensor 400 on horizontal pipe 220, can increase the distance at differential pressure sensor 400 and heater 100 top, enlarge the range scope, improve measurement accuracy, on the other hand, differential pressure sensor can be by supreme bottom of installing at horizontal pipe 220 down, like this, can make to reduce the size of heating tap in horizontal direction, makes the heating tap appearance more slim, and the user of being convenient for will heat the tap and install to the narrow and small position in space.

Illustratively, the end of the transverse tube 220 may also be fitted with a temperature sensor 500. The probe of the temperature sensor 500 may extend into the transverse tube 220. Temperature sensor 500 can be used for detecting the temperature of rivers in the heating tap, and then the controller can also be according to the heating power or the play water flow of the temperature control heater that detect, improves user's use and experiences. By disposing both the differential pressure sensor 400 and the temperature sensor 500 on the lateral pipe 220, the integration of the heating tap can be improved, so that the heating tap can be made smaller in size and convenient to install and use.

Illustratively, the heating faucet may further include a water inlet channel 710 and a water outlet channel 720. The water inlet passage 710 may communicate between the bottom of the heating chamber 100 and the water inlet end 101 of the heating tap. The water outlet passage 720 may communicate between the top of the heating chamber 100 and the water outlet end 102 of the heating tap. Wherein the inlet end 101 may be used to connect to a municipal water pipeline or a water production device, etc., and the outlet end 102 may be used to take water. Through this setting, rivers can be when getting into heating chamber 100 in-process, hold into heating chamber 100 from the bottom of heating chamber 100 gradually to make the liquid level in heating chamber 100 rise steadily, like this, to the liquid level that detects in heating chamber 100, because there is not rivers impact, so the testing result is more accurate.

Illustratively, the water inlet passage 710 and the water outlet passage 720 may be located at the periphery of the heating chamber 100 and the heater. The rivers temperature in inhalant canal 710 is lower, and in the heater heating process, can absorb the heat that the heater diffuses for improve its intraductal temperature, reach the effect of preheating, thereby improve the rate of heating in the heating chamber 100, in addition, inhalant canal 710 can also be through the heat absorption to the heater diffusion, and the heat of avoiding the heater production causes the damage to other devices in the heating tap, plays the effect of cooling. The water outlet channel 720 is disposed around the heating chamber 100 and the heater, so that heat dissipated by the heater can provide a heat preservation effect for water in the water outlet channel 720, and the temperature of the water in the water outlet channel 720 is prevented from dropping in the flowing process.

For example, the water inlet channel 710 may be provided with a water inlet solenoid valve 600 electrically connected to the controller. The controller may be configured to control the inlet solenoid valve 600 to close in response to the user ceasing the water intake operation. The water inlet solenoid valve 600 is used to stop the water inlet channel 710 after the user stops taking water, so as to prevent the water flow in the heating chamber 100 from flowing backwards from the water inlet channel 710, which causes the dry heating of the heater. Of course, the provision of the water inlet channel 710 as shown in fig. 1, which forms a return bend at the bottom of the heating chamber 100, may also serve to prevent the reverse flow of water in the heating chamber 100.

Illustratively, the heating faucet may further include a notification device electrically connected to the controller. The controller can be used for responding to the water taking operation of a user and controlling the prompting device to give a prompt when the current liquid level height is determined to be lower than the preset liquid level height according to the differential pressure signal. The prompting device may include any device having a function of sounding a sound, light, or electricity, etc., which may prompt a user. When a user takes water, if the liquid level in the heating chamber 100 is too low, the prompting device can give a prompt to inform the user that the liquid level in the heating chamber 100 is too low, and the heater is not started, so that the use safety is improved. Of course, if the user continues to take water and the liquid level in the heating chamber 100 gradually rises, the prompting device may stop giving the prompt, and at this time, the heater may also start to operate.

According to another aspect of the present invention, as shown in fig. 3, a waterway system is provided. The waterway system may include the water purifier 20 and any of the above heated faucets 10. The heating faucet 10 may be connected to a water purifier 20. The user can access the purified water heated by the heating faucet through the water path system. The water purifier 20 may include one or more of a water pump, a water tank, a filter, etc., which are not specifically described. In order to provide normal temperature water for the user, a normal temperature water outlet pipe may be further disposed in the heating faucet shown in fig. 2, and the normal temperature water outlet pipe may be directly connected to the water purifier 20 without passing through the heater.

Illustratively, the water purifier may include a water supply electrically connected to the controller. The controller may also be responsive to a user water intake operation and control the water supply outlet flow rate in accordance with the differential pressure signal. The water supply means may comprise one or more of a water pump, a throttle valve or an on-off valve. The effluent flow rate can include the flow rate, and can also include whether the flow rate exists. In the embodiment as shown in fig. 2, the water supply means may comprise a water pump. Taking the water supply device as an example, when a user takes water, the differential pressure signal received by the controller determines that the current liquid level is lower than the preset liquid level height, and the controller can control the water pump to stop working, so that water is not supplied to the heating faucet, and water can be supplied to the heating faucet in a variable flow manner.

In some embodiments, the controller can control the water pump to supply water to the heating tap at a small flow rate lower than the normal flow rate, which can cause the liquid level in the heating chamber 100 to rise slowly and reduce the impact of the water flow on the heating tap. When the liquid level in the heating chamber 100 is higher than the preset liquid level, the controller controls the water pump to supply water at a normal flow rate. Like this, can avoid the rivers that water supply installation provided to produce the impact to heating tap, avoid differential pressure sensor to carry out wrong detection to the liquid level height, improve the accuracy that the controller judges the liquid level height, prevent that the produced phenomenon of burning futilely of heater mistake heating.

Of course, in some embodiments, the controller may also control the water supply device to supply water to the heating tap at a higher flow rate than normal, so that the liquid level in the heating chamber quickly reaches the preset liquid level height. When the liquid level in the heating chamber 100 is higher than the preset liquid level, the controller controls the water pump to supply water at the normal flow rate, so as to reduce the time for the user to wait for getting water.

In a word, the controller can control the water outlet flow of the water supply device according to the received differential pressure signal, so that the waterway system has more achievable functions and the use experience of a user is improved.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior of the respective components as they relate to their own contours.

For convenience of description, relative terms of regions such as "over 8230; \8230" "," ' over 8230; "\8230;", "' over 8230;", \8230;, "' over 8230" "," "over surface", "over", etc. may be used herein to describe the regional positional relationship of one or more components or features to other components or features as illustrated in the figures. It is to be understood that the relative terms of the regions are intended to encompass not only the orientation of the element as depicted in the figures, but also different orientations in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A heating faucet, comprising:

the heating cavity is connected with a water flow channel;

a heater disposed within or about the heating chamber;

a probe of the differential pressure sensor is positioned in the heating cavity and/or the water flow channel, the probe of the differential pressure sensor is lower than the top of the heater, and the differential pressure sensor is used for generating a differential pressure signal according to the current liquid level height in the heating cavity; and

a controller electrically connected to the heater and the differential pressure sensor, the controller for turning on the heater in response to a user water intake operation and upon determining from the differential pressure signal that the current liquid level height is greater than or equal to a preset liquid level height.

2. The heating faucet of claim 1, wherein a bottom of the heating cavity is connected to the water flow passage, the heating cavity forming a communication with the water flow passage.

3. The heating faucet of claim 2, wherein the differential pressure sensor is disposed at a bottom of the communication vessel.

4. The heating faucet of claim 3, comprising a first vertical pipe, a second vertical pipe, and a transverse pipe, wherein two ends of the transverse pipe are connected to the bottom of the first vertical pipe and the bottom of the second vertical pipe through joints, respectively, the first vertical pipe forms the heating cavity, the second vertical pipe and the transverse pipe form the water flow passage, and the differential pressure sensor is mounted on the transverse pipe.

5. The heating faucet of claim 4, wherein the end of the transverse tube is fitted with a temperature sensor, the probe of which extends into the transverse tube.

6. The heating faucet of claim 1, further comprising a water inlet passage communicating between the bottom of the heating chamber and the water inlet end of the heating faucet and a water outlet passage communicating between the top of the heating chamber and the water outlet end of the heating faucet.

7. The heating faucet of claim 6, wherein the water inlet passage and the water outlet passage are located around the heating cavity and the heater.

8. The heating faucet of claim 6, wherein the water inlet channel is provided with a water inlet solenoid valve electrically connected to the controller, and the controller is configured to control the water inlet solenoid valve to close in response to a user stopping the water intake operation.

9. The heating faucet of claim 1, further comprising a prompting device electrically connected to the controller, the controller being configured to control the prompting device to issue a prompt in response to a user water-fetching operation and upon determining from the differential pressure signal that the current liquid level height is below the preset liquid level height.

10. A water circuit system comprising a water purifier and a heating faucet as claimed in any one of claims 1 to 9 connected to the water purifier.

11. The waterway system of claim 10, wherein the water purifier includes a water supply electrically connected to the controller, the controller further configured to control an outflow of the water supply in response to a user water intake operation and in accordance with the differential pressure signal.