A boiling point determination mechanism for instant water heater

Abstract

A boiling point judgment mechanism for an instant hot water machine comprises a water outlet pipe made of non-metallic material for discharging hot water and a capacitance value detection module, wherein two metal and arc-shaped conductive plates are arranged on the outer wall of the water outlet pipe, one end of the conductive plate is arranged with an electrode, the two electrodes are connected to the capacitance value detection module through a line, and the capacitance value detection module detects the change in the capacitance value data between the two electrodes to determine whether the water in the water outlet pipe is in a boiling state or a boiling water state; the boiling point judgment mechanism adopting this structure can make the water machine self-adapt to the use environment at different altitudes to adjust the heating power, avoid the continuous boiling of water in plateau areas, reduce the power consumption caused by excessive boiling, achieve rapid mass production, save the time of re-adjusting the boiling point parameters according to the needs of different altitudes, improve production efficiency, make the detection element not need to contact the water body, and save the sealing insulation and other structures.

Description

Technical Field

[0001] The invention relates to the field of instant hot water machines, in particular to a boiling point judgment mechanism for instant hot water machines. Background Art

[0002] In the prior art, the structure of an instant water machine includes a water tank, a water pump, a heating device, and a water outlet pipe for discharging hot water after the water is heated. In actual use, the water machine only needs to heat the water to a boiling water state (i.e., a device close to boiling, and under standard atmospheric pressure, the water temperature may be around 95 degrees Celsius) through the heating device. This is because when the water is heated to boiling, a large amount of high-temperature water vapor and a very small amount of boiling water will be discharged from the water outlet pipe, which obviously does not meet actual needs. Therefore, the water machine will set a temperature sensing element on the water outlet pipe. When the water is heated to the temperature value corresponding to the boiling water state, the heating power of the heating device will be reduced, so that the water can be kept in a boiling water state without boiling.

[0003] However, due to the altitude, in high altitude areas, the boiling point of water will decrease accordingly due to changes in external air pressure. At this time, the boiling point of the liquid has a large difference. For every 300 meters increase in altitude, the boiling point of the liquid drops by one degree. When the temperature value set by the temperature sensing element is fixed, the water temperature of the water machine will not reach the set temperature value when working in high altitude areas. The heating device in the water machine will continue to work at full power, causing the water to boil at a low boiling point. When the user needs boiled water, only high-temperature water vapor is discharged from the water outlet pipe. This situation may cause the water to dry up and waste electricity. Therefore, manufacturers must repeatedly debug water machines sold to areas at different altitudes to adapt them to the use environment at different altitudes, so that water machines cannot be produced and sold in a unified manner. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned existing problems and to provide a boiling point judgment mechanism for an instant water machine with a simple and reasonable structure, which can enable the water machine to adapt to the use environment at different altitudes, so that the water machine can reduce the heating power of the heating device or increase the water output when the water reaches the boiling water state.

[0005] The present invention is achieved through the following structure:

[0006] A boiling point judgment mechanism for an instant water machine includes a water outlet pipe made of non-metallic material for discharging boiling water and a capacitance value detection module, wherein two metal and arc-shaped conductive plates are arranged on the outer wall of the water outlet pipe, and one end of the conductive plate is provided with an electrode, and the two electrodes are connected to the capacitance value detection module through a line. The capacitance value detection module detects the change in the capacitance value data between the two electrodes to determine whether the water in the water outlet pipe is in a boiling state or a boiling water state, so as to adjust the outlet water temperature state.

[0007] The present invention can also be solved by the following technical measures:

[0008] When the water outlet pipe is in a waterless state, the capacitance value detection module detects that the low point capacitance value between the two electrodes is A value, and when the water outlet pipe is in a water-filled state, the capacitance value detection module detects that the high point capacitance value between the two electrodes is B value;

[0009] When the heated water is discharged through the outlet pipe, when the real-time capacitance value is at or close to value B, it is judged that the water is in a boiling state, and the water boiler is controlled to stabilize the outlet water temperature. When the heated water is discharged through the outlet pipe, when the real-time capacitance value is at or close to value A, it is judged that the water is in a boiling state, and the water boiler is controlled to lower the outlet water temperature so that the outlet water temperature is in a critical boiling state.

[0010] The outer end surface of the water outlet pipe is concavely provided with an annular groove adapted to the width of the conductive plate. The conductive plate is tightly installed in the annular groove, and the outer surface of the conductive plate is flush with the outer end surface of the water outlet pipe.

[0011] An annular groove is formed on the outer end surface of the water outlet pipe. The conductive plate is sleeved in the annular groove and then integrally packaged in the wall of the water outlet pipe by injection molding.

[0012] The water outlet pipe is provided with a detection chip installation box, a detection chip is installed in the detection chip installation box, the capacitance value detection module is arranged in the detection chip, and both ends of the conductive plate extend into the detection chip installation box and are connected to the detection chip.

[0013] The conductive plate is made of conductive metal or alloy material.

[0014] The water outlet pipe is a circular tubular structure made of non-conductive material.

[0015] The beneficial effects of the present invention are as follows:

[0016] The present invention discloses a boiling point judgment mechanism for an instant water heater. The boiling point judgment mechanism with this structure can make the water heater adapt to the use environment of different altitudes without presetting boiling point control parameters, so that the water heater can be used in areas of any altitude in the country, avoid continuous boiling of water in plateau areas, reduce power consumption caused by excessive boiling, achieve rapid batch production, save time for readjusting boiling point parameters according to the needs of areas with different altitudes, improve production efficiency, make it unnecessary for the detection element to contact with the water body, save sealing and insulation structures, reduce production costs, have a simple structure, and ensure reliable and stable temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The cross-sectional structure of the present invention is shown in FIG. Figure 1 .

[0018] Figure 2 The cross-sectional structure of the present invention is shown in FIG. Figure 2 .

[0019] Figure 3 The structure of the water outlet pipe and the conductive plate of the present invention is shown in FIG. Figure 1 .

[0020] Figure 4 The structure of the water outlet pipe and the conductive plate of the present invention is shown in FIG. Figure 2 .

[0021] Figure 5 The structure of the water outlet pipe and the conductive plate of the present invention is shown in FIG. Figure 3 . DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1 As shown, a boiling point judgment mechanism for an instant water machine includes a water outlet pipe 1 made of non-metallic material for discharging boiling water and a capacitance value detection module 2, two metal and arc-shaped conductive plates 3 are arranged on the outer wall of the water outlet pipe 1, and one end of the conductive plate 3 is provided with an electrode 4, and the two electrodes 4 are connected to the capacitance value detection module 2 through a line. The capacitance value detection module 2 detects the change in the capacitance value data between the two electrodes 4 to determine whether the water in the water outlet pipe 1 is in a boiling state or a boiling water state, so as to adjust the outlet water temperature state.

[0024] The boiling point judgment mechanism adopting this structure can make the water machine adapt to the use environment of different altitudes without pre-setting the boiling point control parameters, so that the water machine can be used in areas of any altitude across the country, avoid continuous boiling of water in plateau areas, reduce the energy consumption caused by excessive boiling, achieve rapid mass production, save time for readjusting boiling point parameters according to the needs of areas with different altitudes, improve production efficiency, make the detection element do not need to contact with the water body, can save sealing insulation and other structures, reduce production costs, simple structure, reliable and stable temperature control.

[0025] When the water outlet pipe 1 is in a waterless state, the capacitance value detection module 2 detects that the low point capacitance value between the two electrodes 4 is A value, and when the water outlet pipe 1 is in a water-filled state, the capacitance value detection module 2 detects that the high point capacitance value between the two electrodes 4 is B value;

[0026] When the heated water is discharged through the water outlet pipe 1, when the real-time capacitance value is at or close to value B, it is judged that the water is in a boiling water state, and the water boiler is controlled to stabilize the water outlet temperature. When the heated water is discharged through the water outlet pipe 1, when the real-time capacitance value is at or close to value A, it is judged that the water is in a boiling state, and the water boiler is controlled to lower the water outlet temperature so that the water outlet temperature is in a critical boiling state.

[0027] In the actual test, when the outlet pipe 1 is dry, there is only air in the outlet pipe 1, and there are no metal ions in the water body to cause the capacitance change, so the detected capacitance value is the minimum (reference value is 0). On the contrary, when the outlet pipe 1 is full of water, the metal ions in the water body make the detected capacitance value the maximum (reference value is 5).

[0028] When the water outlet pipe 1 normally discharges water in a boiling state, the real-time capacitance value is close to the B value (for example, the reference value is 4.5~5). This is because the water passing through the water outlet pipe 1 is only close to a boiling state, and only a small amount of water vapor passes through. Therefore, the capacitance value detection module 2 can detect a large number of metal ions passing through. When the water machine is used in a high-altitude area, the boiling point of the water body decreases. When the water outlet pipe discharges water with only a large amount of water vapor, the real-time capacitance value is at or close to the A value (for example, the reference value is 0~0.5). The capacitance value detection module 2 determines that the water in the water machine is over-boiling. The water machine can reduce the heating power by controlling the heating device to reduce the water outlet temperature to a critical boiling state, thereby reducing the generation of a large amount of water vapor due to boiling. This method enables the water machine to accurately control the water discharged by the water machine to be in a boiling state at any altitude, and the situation of boiling and generating a large amount of water vapor will not continue.

[0029] Reducing the heating power is only one of the implementation methods. As an alternative, when the heating power remains unchanged, the capacitance value detection module 2 can also be used to control the water pump in the water boiler to increase the water output to the water outlet pipe 1. When the water volume increases, the heat of boiling water is dispersed, so that the outlet water temperature is reduced, and the water body can be stabilized in a boiling water state (that is, the water body is not boiling, or is in a critical boiling state).

[0030] When the water boiler is working in a negative altitude area, the boiling point of the water increases. Since the heating device is already working at full power when used under standard atmospheric pressure, when the water boiler is working in a negative altitude area, the water pump of the water boiler can only be controlled by the capacitance value detection module 2 to reduce the working power of the water pump, thereby extending the residence time of the water in the heating device, thereby increasing the heating time of the water until boiling.

[0031] The low point capacitance value A and the high point capacitance value B belong to the domain value. When the capacitance value parameters are set before leaving the factory, they will be affected by other factors such as the material of the water outlet pipe 1, the thickness of the pipe wall and the inner diameter of the water outlet pipe 1. Therefore, the A value, the B value and the real-time capacitance value at the boiling point need to be tested by the manufacturer to obtain the domain value of the above values.

[0032] The outer end surface of the water outlet pipe 1 is concavely provided with an annular groove 101 adapted to the width of the conductive plate 3, and the conductive plate 3 is tightly installed in the annular groove 101 (refer to Figure 3 As shown), the outer surface of the conductive plate 3 is flush with the outer end surface of the water outlet pipe 1; this structure is easy and quick to install and fix, can improve the assembly efficiency, shorten the distance between the conductive plate 3 and the water body, and after assembly, can keep the water outlet pipe smooth as a whole.

[0033] The outer end surface of the water outlet pipe 1 is provided with an annular groove 101. After the conductive plate 3 is sleeved in the annular groove 101, it is integrally packaged in the wall of the water outlet pipe 1 by injection molding (refer to Figure 4 As shown); it can prevent the conductive plate 3 from being worn and the outer end surface of the conductive plate 3 from being oxidized, making the detected data more stable and accurate, and reducing the influence of the air layer between the conductive plate 3 and the water outlet pipe 1.

[0034] By injection molding, the limiting parts 102 for limiting the conductive plate 3 can be injection molded at both ends of the annular groove 201 (see Figure 5 As shown in FIG. 1 ), the limiting portion 102 is pressed against two side edges of the conductive plate 3 .

[0035] like Figure 2 As shown, a detection chip installation box 5 is provided on the water outlet pipe 1, a detection chip 6 is installed in the detection chip installation box 5, the capacitance value detection module 2 is arranged in the detection chip 6, and both ends of the conductive plate 3 extend into the detection chip installation box 5 and are connected to the detection chip 6; this structure can reduce the volume of the boiling point judgment mechanism, shorten the transmission distance of the line to the data, and better protect the detection chip 6.

[0036] The detection chip 6 is also connected to a power supply 7 for providing electrical energy to the detection chip 6 .

[0037] The conductive plate 3 is made of conductive metal or alloy material. The conductive plate 3 made of this material has good conductivity, high detection accuracy, and is corrosion-resistant. Rust will occur after long-term use, affecting the detected capacitance value data.

[0038] The water outlet pipe 1 is a circular tubular structure made of non-conductive material.

[0039] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A boiling point determination mechanism for an instant water heater, characterized in that: The invention comprises a water outlet pipe (1) made of a non-metallic material for discharging boiling water and a capacitance value detection module (2), wherein two metal conductive plates (3) in a circular arc shape are arranged on the outer wall of the water outlet pipe (1), and one end of the two conductive plates (3) is provided with an electrode (4), and the two electrodes (4) are connected to the capacitance value detection module (2) through a line, and the capacitance value detection module (2) detects the change in the capacitance value data between the two electrodes (4) to determine whether the water in the water outlet pipe (1) is in a boiling state or a boiling water state, so as to adjust the outlet water temperature state; When the water outlet pipe (1) is in a waterless state, the capacitance value detection module (2) detects that the low point capacitance value between the two electrodes (4) is a value A, and when the water outlet pipe (1) is in a water-filled state, the capacitance value detection module (2) detects that the high point capacitance value between the two electrodes (4) is a value B; When the heated water is discharged through the water outlet pipe (1), the real-time capacitance value is at or close to the B value, the water is judged to be in a boiling state, and the water boiler is controlled to stabilize the outlet water temperature. When the heated water is discharged through the water outlet pipe (1), the real-time capacitance value is at or close to the A value, the water is judged to be in a boiling state, and the water boiler is controlled to lower the outlet water temperature so that the outlet water temperature is in a critical boiling state.

2. A boiling point determination mechanism for an instant water heater according to claim 1, characterized in that: The outer end surface of the water outlet pipe (1) is provided with an annular groove (101) adapted to the width of the conductive plate (3); the conductive plate (3) is tightly installed in the annular groove (101); and the outer surface of the conductive plate (3) is flush with the outer end surface of the water outlet pipe (1).

3. A boiling point determination mechanism for an instant water heater according to claim 1, characterized in that: The outer end surface of the water outlet pipe (1) is provided with an annular groove (101), and the conductive plate (3) is sleeved in the annular groove (101) and then integrally packaged in the wall of the water outlet pipe (1) by injection molding.

4. A boiling point determination mechanism for an instant water heater according to claim 1, characterized in that: The water outlet pipe (1) is provided with a detection chip installation box (5), a detection chip (6) is installed in the detection chip installation box (5), the capacitance value detection module (2) is arranged in the detection chip (6), and both ends of the conductive plate (3) extend into the detection chip installation box (5) and are connected to the detection chip (6).

5. A boiling point determination mechanism for an instant water heater according to claim 1, characterized in that: The conductive plate (3) is made of a conductive alloy material.

6. A boiling point determination mechanism for an instant water heater according to claim 1, characterized in that: The water outlet pipe (1) is a circular tubular structure made of non-conductive material.

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