A kitchen appliance liquid level and quantity real-time monitoring system

Abstract

The application discloses a kind of real-time monitoring system of kitchen appliance liquid level liquid quantity, including pressure transmission pipeline, one end of pressure transmission pipeline is connected with pressure reducing component, the other end is connected with pressure sensing component;The one end of pressure transmission pipeline connection pressure reducing component is below the lowest liquid level line of liquid in kitchen appliance, and pressure reducing component is used to buffer the liquid entering pressure transmission pipeline;The one end of pressure transmission pipeline connection pressure sensing component is located outside the liquid in kitchen appliance, and pressure sensing component includes air pressure sensor and PCB board, air pressure sensor is used to detect the air pressure in pressure transmission pipeline, and converts pressure signal or differential pressure signal into electrical signal, and PCB board is used to load air pressure sensor, and pressure sensing component is connected with main control board, and main control board calculates liquid level by electrical signal measured by air pressure sensor.The application can be used for real-time monitoring of kitchen appliance liquid level, and the system structure is simple, and higher measurement accuracy can be guaranteed under the premise of low implementation cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a kitchen appliance liquid level and liquid volume real-time monitoring system. BACKGROUND

[0002] At present, there are many types of kitchen appliances, including various electric appliances for preparing drinks, such as hot beverage machines, coffee machines, etc. These devices are provided with a liquid cavity, and the liquid level in the cavity needs to be monitored during use to achieve the purpose of controlling the amount of liquid discharged. For example, when a user is brewing a cup of coffee, the device needs to discharge a certain amount of hot water for brewing, and if the device discharges too much or too little hot water, it will result in poor taste of the brewed coffee. Although many kitchen appliances can monitor the change of liquid level or liquid volume in real time, the implementation method is too complex and the cost is generally too high. Currently, the flow control of kitchen appliances usually uses flow meters or program algorithms for control. The use of flow meters has high equipment cost, and the use of program algorithms cannot guarantee the calculation accuracy, which will result in large errors. Therefore, it is urgent to develop a kitchen appliance liquid level and liquid volume real-time monitoring system to solve the problems of cost and accuracy, and to monitor the liquid level in real time. SUMMARY

[0003] The purpose of the present application is to provide a kitchen appliance liquid level and liquid volume real-time monitoring system. The present application can be used for real-time monitoring of the liquid level of kitchen appliances, and the system structure is simple, which can guarantee high measurement accuracy under the premise of low implementation cost.

[0004] The technical scheme of the present application is a kitchen appliance liquid level and liquid volume real-time monitoring system, which comprises a pressure transmission pipeline, one end of the pressure transmission pipeline is connected with a pressure reduction assembly, and the other end is connected with a pressure sensing assembly; one end of the pressure transmission pipeline connected with the pressure reduction assembly is located below the lowest liquid level line of the liquid in the kitchen appliance, and the pressure reduction assembly is used to buffer the liquid entering the pressure transmission pipeline; one end of the pressure transmission pipeline connected with the pressure sensing assembly is located outside the liquid in the kitchen appliance, the pressure sensing assembly comprises an air pressure sensor and a PCB board, the air pressure sensor is used to detect the air pressure in the pressure transmission pipeline and convert the pressure signal or pressure difference signal into an electric signal, and the PCB board is used to load the air pressure sensor; the pressure sensing assembly is connected with a main control board, and the main control board calculates the liquid level according to the electric signal detected by the air pressure sensor.

[0005] Compared with the prior art, the beneficial effects of the present application are embodied in that the monitoring system of the present application is based on the air pressure monitoring principle, the main structure of the system is that the pressure transmission pipeline is connected with the pressure reducing assembly and the pressure sensing assembly at both ends, the structure is relatively simple, and the cost is relatively low. Among them, the end where the pressure reducing assembly is located is immersed in the liquid, and the pressure sensing assembly is arranged outside the liquid. With the change of the liquid level height, the liquid enters and exits the pressure transmission pipeline from the end where the pressure reducing assembly is located, so that the air pressure in the pressure transmission pipeline changes. The pressure sensing assembly is used for detecting the air pressure value, and the liquid level value is calculated by the algorithm program after being transmitted to the main control board. Due to the existence of the pressure reducing assembly, the liquid can be prevented from entering the pressure transmission pipeline too quickly, the air pressure in the pressure transmission pipeline can change smoothly, the measurement is more stable, the measurement accuracy is improved, and the pressure sensing assembly is prevented from being damaged by strong airflow. Since the liquid level value measured by the pressure sensing assembly is real-time, according to the liquid consumption of the prepared beverage, the system can strictly control the liquid amount discharged by the kitchen appliance at a time, and facilitate the user to prepare the beverage with capacity requirements.

[0006] The kitchen appliance of the present application comprises a container cavity for containing liquid, and the pressure transmission pipeline has two setting modes relative to the container cavity:

[0007] One setting mode of the pressure transmission pipeline relative to the container cavity is that the pressure transmission pipeline is located inside the container cavity as a whole, and the pressure sensing assembly is located above the highest liquid level line of the liquid in the container cavity.

[0008] In the aforementioned kitchen appliance liquid level and liquid amount real-time monitoring system, the inner wall of the container cavity is provided with an overflow hole in the height interval between the lower part of the pressure sensing assembly and the upper part of the highest liquid level line of the liquid.

[0009] Another setting mode of the pressure transmission pipeline relative to the container cavity is that the pressure transmission pipeline comprises an internal segment located inside the container cavity and an external segment located outside the container cavity, the container cavity is provided with a bidirectional joint penetrating the inner and outer walls of the container cavity, the two ends of the bidirectional joint are connected with one end of the internal segment and the external segment respectively, and the other ends of the internal segment and the external segment are connected with the pressure reducing assembly and the pressure sensing assembly respectively.

[0010] In the aforementioned kitchen appliance liquid level and liquid amount real-time monitoring system, the internal segment is provided with a one-way valve for preventing the liquid from flowing into the external segment.

[0011] In the aforementioned kitchen appliance liquid level and liquid amount real-time monitoring system, the internal segment is in the shape of inverted U, the inner wall of the container cavity is provided with an overflow hole, and the setting height of the overflow hole is lower than the height of the inner vertex of the inverted U shape of the internal segment.

[0012] In the aforementioned kitchen appliance liquid level and liquid amount real-time monitoring system, the bidirectional joint is arranged at the bottom of the container cavity, and the external segment and the pressure sensing assembly are located outside the bottom of the container cavity.

[0013] Regardless of how the pressure transmission pipeline is arranged relative to the cavity, in the aforementioned kitchen appliance liquid level and quantity real-time monitoring system, the pressure sensing assembly further comprises a bracket for fixing the PCB.

[0014] In the aforementioned kitchen appliance liquid level and quantity real-time monitoring system, the pressure reduction assembly comprises a connector connected to the end of the pressure transmission pipeline, and a buffer sheet is clamped on the connector, and a liquid inlet hole is arranged on the buffer sheet.

[0015] In the aforementioned kitchen appliance liquid level and quantity real-time monitoring system, a buffer block is arranged on the inner side of the buffer sheet opposite to the liquid inlet hole. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the monitoring system in the kitchen appliance in Example 1;

[0017] Figure 2 is an exploded view of the detection device;

[0018] Figure 3 is a structural schematic diagram of the monitoring system in the kitchen appliance in Example 2;

[0019] Figure 4 is a structural schematic diagram of the monitoring system in the kitchen appliance in Example 2 from another perspective;

[0020] Figure 5 is an enlarged view of A part in Figure 1

[0021] Figure 6 is an enlarged view of B part in Figure 1

[0022] Figure 7 is a structural schematic diagram of the buffer sheet;

[0023] Figure 8 is a schematic diagram of the external modeling of the kitchen appliance in Example 1 and Example 2;

[0024] Figure 9 is a schematic diagram of the display interface of the display screen of the kitchen appliance in Example 1 and Example 2.

[0025] ​​Reference signs: 1 - body, 101 - cavity, 1011 - overflow hole, 102 - display screen, 2 - detection device, 21 - pressure sensing assembly, 211 - PCB board, 212 - air pressure sensor, 22 - pressure transmission pipeline, 221 - built-in section, 222 - external section, 23 - pressure reduction assembly, 231 - connector, 2311 - clamping part, 232 - buffer sheet, 2321 - liquid inlet hole, 2322 - buffer block, 2323 - clamping groove, 2324 - opening, 24 - one-way valve, 3 - liquid level indication area, 1000 - two-way connector. DETAILED DESCRIPTION

[0026] The application will be further described below in conjunction with the drawings and examples, but not as the basis for limiting the application.

[0027] Example 1: A kitchen appliance liquid level and liquid volume real-time monitoring system, the system structure can refer to Figure 1 and Figure 2 , including a pressure transmission pipeline 22, one end of the pressure transmission pipeline 22 is connected with a pressure reduction assembly 23, and the other end is connected with a pressure sensing assembly 21; one end of the pressure transmission pipeline 22 connected with the pressure reduction assembly 23 is located below the lowest liquid level line of the liquid in the kitchen appliance, and the pressure reduction assembly 23 is used for buffering the liquid entering the pressure transmission pipeline 22; one end of the pressure transmission pipeline 22 connected with the pressure sensing assembly 21 is located outside the liquid in the kitchen appliance, and the pressure sensing assembly 21 includes an air pressure sensor 212 and a PCB board 211, the air pressure sensor 212 is used for detecting the air pressure in the pressure transmission pipeline 22, converting the pressure signal or pressure difference signal into an electric signal, and the PCB board 211 is used for loading the air pressure sensor 212, and the pressure sensing assembly 21 is connected with a main control board, and the main control board calculates the liquid level through the electric signal detected by the air pressure sensor 212.

[0028] As preferred, the pressure transmission pipeline 22 is located inside the cavity 101 as a whole, and the pressure sensing assembly 21 is located above the highest liquid level line of the liquid in the cavity 101, that is to say, the pressure sensing assembly 21 of the monitoring system in this embodiment is built-in in the cavity 101, and is suitable for the equipment that the cavity 101 is integrally formed in the kitchen appliance and cannot be detached.

[0029] As preferred, the overflow hole 1011 is arranged in the height interval between the inner wall of the cavity 101 below the pressure sensing assembly 21 and above the highest liquid level line of the liquid, and the existence of the overflow hole 1011 can ensure that the liquid in the cavity 101 does not immerse the pressure sensing assembly 21, so as to prevent the pressure sensing assembly 21 from being damaged by contacting the liquid, and the safety of the system in use is ensured.

[0030] As preferred, the pressure sensing assembly 21 further includes a bracket, and the bracket is used for fixing the PCB board 211.

[0031] As preferred, the pressure reducing assembly 23 comprises a connecting head 231 connected with the end of the pressure transmission pipeline 22, the connecting head 231 is clamped with a buffer sheet 232, the buffer sheet 232 is provided with liquid inlet holes 2321, the buffer sheet 232 is provided with buffer blocks 2322 at the position opposite to the liquid inlet holes 2321, so as to avoid liquid entering the pressure transmission pipeline 22 too fast, prevent too large airflow in the pressure transmission pipeline 22, make the air pressure in the pressure transmission pipeline 22 change smoothly, make the measurement more stable, improve the measurement accuracy, and prevent strong airflow from damaging the pressure sensing assembly 21, so that the pressure sensing assembly 21 is not easy to be damaged, and has long service life.

[0032] Reference Figure 1 、 Figure 2 、 Figure 6 and Figure 7 , the connecting head 231 of the pressure reducing assembly 23 is fixedly sleeved on one end of the pressure transmission pipeline 22, the connecting head 231 is clamped with the buffer sheet 232, the connecting head 231 is provided with a clamping portion 2311, and the buffer sheet 232 is provided with a clamping groove 2323 matched with the clamping portion 2311; the connecting head 231 is connected between the pressure transmission pipeline 22 and the buffer sheet 232, the number of the liquid inlet holes 2321 and the buffer blocks 2322 corresponding to the liquid inlet holes 2321 on the buffer sheet 232 is 4, and the liquid inlet holes 2321 are annularly and equally spaced, so that the buffer effect is good; liquid enters the pressure transmission pipeline 22 from the liquid inlet holes 2321, the buffer blocks 2322 and the buffer sheet 232 form openings 2324 communicated with the liquid inlet holes 2321, and the buffer blocks 2322 are arranged above the liquid inlet holes 2321, so as to buffer the liquid flowing into the liquid inlet holes 2321, and the buffered liquid slowly flows into the pressure transmission pipeline 22 from the openings 2324.

[0033] The kitchen appliance applying the system of the application can refer to Figure 1 and Figure 8The utility model relates to a liquid level detection device, including: the body 1 is provided with the cavity 101 for containing liquid on the body 1, and the liquid can be drinking water, coffee or other edible liquid, the detection device 2 for detecting the liquid level in the cavity 101 is arranged on the body 1 to enable the user to operate accordingly, such as adding water or corresponding liquid in time when detecting the low liquid level, the detection device 2 includes a pressure sensing assembly 21 and a pressure transmission pipeline 22 connected with the pressure sensing assembly 21, a pressure reduction assembly 23 connected with the pressure transmission pipeline 22, the pressure transmission pipeline 22 is communicated with the cavity 101 to enable the liquid to enter the pressure transmission pipeline 22 to generate pressure, and the pressure sensing assembly 21 is used for detecting air pressure, the bottom of the pressure transmission pipeline 22 is placed in the cavity 101 to facilitate the liquid to enter the pressure transmission pipeline 22 to compress the air in the pressure transmission pipeline 22 to generate gas pressure, and the liquid level in the cavity 101 is directly proportional to the gas pressure in the pressure transmission pipeline 22, that is, the higher the liquid level, the greater the gas pressure in the pressure transmission pipeline 22, the liquid level in the cavity 101 is reflected according to the size of the gas pressure in the pressure transmission pipeline 22, and the amount of liquid in the cavity 101 is reflected by the liquid level in the cavity 101, the gas pressure in the pressure transmission pipeline 22 can be transmitted to the pressure sensing assembly 21, the pressure sensing assembly 21 is used for detecting the gas pressure in the pressure transmission pipeline 22 to be converted into an electric signal, the electric signal can be transmitted to the terminal for the user to acquire the liquid level information in real time, and the terminal is the display screen 102 of the body 1 or mobile terminal APP, so that the liquid level or liquid amount and the change of liquid level and liquid amount are fed back to the UI interface of the display screen or mobile terminal APP in real time, the user can intuitively perceive the liquid level and liquid amount in the cavity 101, and accordingly the corresponding function selection (such as water adding operation) can be made according to the liquid level, and the utility model is convenient to use.

[0034] As preferred, reference is made to Figure 1 and Figure 2The pressure transmission pipeline 22 is hollow, simple in structure, low in use cost, not easy to be damaged, and low in maintenance cost. The pressure transmission pipeline 22 is in a straight pipe shape, and the axis direction of the pressure transmission pipeline 22 is perpendicular to the horizontal plane. One end of the pressure transmission pipeline 22 is arranged at the bottom of the cavity 101 and communicates with the cavity 101, so that the liquid in the cavity 101 can enter the pressure transmission pipeline 22. The other end of the pressure transmission pipeline 22 is connected with the pressure sensing assembly 21. The two ends of the pressure transmission pipeline 22 are a pressure input end and a pressure output end, which are in communication. The pressure input end is arranged at the bottom of the cavity 101, so that the pressure input end can also receive the liquid pressure in the cavity 101 to transmit to the pressure output end when the liquid level is low. The pressure output end is connected with the pressure sensing assembly 21. When the liquid is added in the cavity 101, the liquid compresses the air in the pressure transmission pipeline. The pressure transmission pipeline is directly connected to the pressure sensing assembly 21, so that the pressure sensing assembly 21 senses the change of the air pressure of the pressure output end, and transmits the signal to the main control board. The main control board is electrically connected with the pressure sensing assembly 21.

[0035] As preferred, referring to Figure 2 and Figure 5 , the air pressure sensor 212 is connected with the pressure transmission pipeline 22. The air pressure sensor 212 can receive the pressure of the pressure output end of the pressure transmission pipeline 22 and convert the pressure into an electric signal. The main control board is electrically connected with the PCB board 211. The electric signal converted by the air pressure sensor 212 is transmitted to the PCB board 211 and then to the main control board, and finally displayed on the display screen 102 of the body 1 or the mobile terminal APP, so that the user can intuitively perceive the liquid level and liquid volume in the cavity 101. A wireless transmission module can be arranged on the body 1 for connecting the mobile terminal device. The main control board is electrically connected with the display screen 102. The main control board can be provided with a wireless transmission module for connecting the mobile terminal device. The amount of discharged liquid is calculated by the algorithm software according to the change of the pressure received by the air pressure sensor 212, so as to replace the flow meter to quantify the beverage, and facilitate the user to make the beverage with capacity requirement.

[0036] As preferred, referring to Figure 8 and Figure 9The body 1 is provided with a display screen 102, and the display screen 102 is provided with a display interface, and the interface includes a liquid level indication area 3 for displaying the liquid level in the container cavity 101. The liquid level indication area 3 corresponds to a number. The larger the number, the higher the liquid level. This facilitates the user to more intuitively perceive the liquid level and liquid volume in the container cavity 101. The display screen 102 is electrically connected with the pressure sensing assembly 21. In use, the pressure sensing assembly 21 transmits an electrical signal to the display screen 102 to display the liquid level information in the container cavity 101. The capacity of the liquid in the container cavity 101 and the change of the capacity are displayed in real time, so that the user can intuitively perceive the liquid level and liquid volume in the container cavity 101, and the use is convenient. When the liquid level in the container cavity 101 is too low or too high, an alarm information is displayed on the display screen 102 or an APP to remind the user. A sound signal can also be emitted through a sound emitter connected to a control mainboard in the body 1 to remind the user. The liquid level information can also be voice broadcasted through the sound emitter.

[0037] Embodiment 2: A kitchen appliance liquid level and liquid volume real-time monitoring system. The system structure can refer to Figure 3 and Figure 4 , and includes a pressure transmission pipeline 22. One end of the pressure transmission pipeline 22 is connected with a pressure reduction assembly 23, and the other end is connected with a pressure sensing assembly 21. The end of the pressure transmission pipeline 22 connected with the pressure reduction assembly 23 is located below the lowest liquid level line of the liquid in the kitchen appliance. The pressure reduction assembly 23 is used to buffer the liquid entering the pressure transmission pipeline 22. The end of the pressure transmission pipeline 22 connected with the pressure sensing assembly 21 is located outside the liquid in the kitchen appliance. The pressure sensing assembly 21 includes an air pressure sensor 212 and a PCB board 211. The air pressure sensor 212 is used to detect the air pressure in the pressure transmission pipeline 22, and convert the pressure signal or pressure difference signal into an electrical signal. The PCB board 211 is used to load the air pressure sensor 212. The pressure sensing assembly 21 is connected with a main control board. The main control board calculates the liquid level according to the electrical signal detected by the air pressure sensor 212.

[0038] As a preferred, the pressure transmission pipeline 22 includes an internal segment 221 located inside the container cavity 101 and an external segment 222 located outside the container cavity 101. The container cavity 101 is provided with a two-way joint 1000 penetrating the inner and outer walls of the container cavity 101. The two ends of the two-way joint 1000 are respectively connected with one end of the internal segment 221 and one end of the external segment 222. The other end of the internal segment 221 and the other end of the external segment 222 are respectively connected with the pressure reduction assembly 23 and the pressure sensing assembly 21. That is, the pressure sensing assembly 21 of the monitoring system in this embodiment is externally located in the container cavity 101, and is suitable for the equipment that the container cavity 101 can be detached from the kitchen appliance.

[0039] As a preferred, the internal segment 221 is provided with a one-way valve 24 for preventing the liquid from flowing into the external segment 222, such as Figure 4As shown, the flow direction of the one-way valve 24 is from top to bottom, and the closing direction of the one-way valve 24 is from bottom to top, preventing liquid from flowing to the pressure sensing assembly 21 along the pressure transmission pipeline 22 to cause damage to the pressure sensing assembly 21.

[0040] As preferred, the built-in section 221 is in inverted U shape, and the inner wall of the cavity 101 is provided with an overflow hole 1011, the setting height of the overflow hole 1011 is lower than the inner top height of the inverted U shape of the built-in section 221, and the existence of the overflow hole 1011 can ensure that the liquid height in the cavity 101 will not rise to the inner top of the U-shaped built-in section 221, and the liquid in the cavity 101 will not flow back into the outer section 222 to cause damage to the pressure sensing assembly 21.

[0041] As preferred, the two-way joint 1000 is arranged at the bottom of the cavity 101, and the outer section 222 and the pressure sensing assembly 21 are located outside the bottom of the cavity 101, facilitating the upward disassembly of the cavity 101.

[0042] As preferred, the pressure sensing assembly 21 further comprises a bracket for fixing the PCB board 211.

[0043] As preferred, the pressure reducing assembly 23 comprises a connecting head 231 connected with the end of the pressure transmission pipeline 22, a buffer sheet 232 is clamped on the connecting head 231, the buffer sheet 232 is provided with a liquid inlet hole 2321, and a buffer block 2322 is arranged at the position inside the buffer sheet 232 opposite to the liquid inlet hole 2321, avoiding the liquid from entering the pressure transmission pipeline 22 too fast, preventing the generation of excessive airflow in the pressure transmission pipeline 22, making the air pressure change in the pressure transmission pipeline 22 stable, making the measurement more stable, improving the measurement accuracy, and preventing the strong airflow from damaging the pressure sensing assembly 21, so that the pressure sensing assembly 21 is not easy to be damaged and has long service life.

[0044] The kitchen appliance applying the system of the present application can refer to Figure 3 , Figure 4 and Figure 8 The difference between the present embodiment and the embodiment 1 is that the cavity 101 and the body 1 are detachably assembled, rather than fixedly integrated, and the pressure sensing assembly 21 is fixedly arranged on the body 1 below the cavity 101 by bolts. Since the pressure transmission pipeline 22 in the present embodiment is divided into the built-in section 221 and the outer section 222, when the cavity 101 is detached from the body 1, the built-in section 221 and the outer section 222 are separated, and the pressure sensing assembly 21 is fixed with the body 1, so that when the cavity 101 is separated upward from the body 1, the pressure sensing assembly 21 will not interfere with the cavity 101.

[0045] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0046] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments only, and any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principle of the present application shall also be regarded as the protection scope of the present application.

Claims

1. A real-time liquid level and volume monitoring system for kitchen appliances, characterized in that: The device includes a pressure transmission pipeline (22), one end of which is connected to a pressure reducing component (23), and the other end is connected to a pressure sensing component (21). The end of the pressure transmission pipeline (22) connected to the pressure reducing component (23) is located below the lowest liquid level line of the liquid inside the kitchen appliance. The pressure reducing component (23) is used to buffer the liquid entering the pressure transmission pipeline (22). The end of the pressure transmission pipeline (22) connected to the pressure sensing component (21) is located outside the liquid inside the kitchen appliance. The pressure sensing component (21) includes a pressure sensor (212) and a PCB board (211). The pressure sensor (212) is used to detect the air pressure inside the pressure transmission pipeline (22) and convert the pressure signal or differential pressure signal into an electrical signal. The PCB board (211) is used to mount the pressure sensor (212). The pressure sensing component (21) is connected to a main control board. The main control board calculates the liquid level through the electrical signal measured by the pressure sensor (212). The pressure reducing assembly (23) includes a connector (231) connected to the end of the pressure transmission pipeline (22), a buffer plate (232) is snapped onto the connector (231), and an inlet hole (2321) is provided on the buffer plate (232); a buffer stop (2322) is provided on the inner side of the buffer plate (232) opposite to the inlet hole (2321).

2. The real-time liquid level and volume monitoring system for kitchen appliances according to claim 1, characterized in that: The kitchen appliance includes a cavity (101) for containing liquid, the pressure transmission pipeline (22) is located entirely inside the cavity (101), and the pressure sensing component (21) is located above the highest liquid level line inside the cavity (101).

3. The real-time liquid level and volume monitoring system for kitchen appliances according to claim 2, characterized in that: The inner wall of the cavity (101) is provided with an overflow hole (1011) located in the height range between below the pressure sensing component (21) and above the highest liquid level line.

4. The real-time liquid level and volume monitoring system for kitchen appliances according to claim 1, characterized in that: The kitchen appliance includes a cavity (101) for containing liquid. The pressure transmission pipeline (22) includes an internal section (221) inside the cavity (101) and an external section (222) outside the cavity (101). The cavity (101) is provided with a bidirectional connector (1000) that penetrates the inner and outer walls of the cavity (101). The two ends of the bidirectional connector (1000) are respectively connected to one end of the internal section (221) and one end of the external section (222). The other ends of the internal section (221) and the external section (222) are respectively connected to a pressure reducing component (23) and a pressure sensing component (21).

5. The real-time liquid level and volume monitoring system for kitchen appliances according to claim 4, characterized in that: The built-in section (221) is equipped with a one-way valve (24) to prevent liquid from flowing into the external section (222).

6. The real-time liquid level and volume monitoring system for kitchen appliances according to claim 4, characterized in that: The built-in section (221) is in the shape of an inverted U. The inner wall of the cavity (101) is provided with an overflow hole (1011). The height of the overflow hole (1011) is lower than the height of the inner vertex of the inverted U-shape of the built-in section (221).

7. The real-time liquid level and volume monitoring system for kitchen appliances according to claim 4, characterized in that: The bidirectional connector (1000) is located at the bottom of the cavity (101), and the external section (222) and the pressure sensing component (21) are located on the outside of the bottom of the cavity (101).

8. A real-time liquid level and volume monitoring system for kitchen appliances according to any one of claims 1-7, characterized in that: The pressure sensing component (21) also includes a bracket for fixing the PCB board (211).

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