Water purifier water level detection method, device and water purifier

Abstract

The present invention discloses a water level detection method, device, and water purifier for a water purifier. The water purifier includes a water outlet, wherein the method includes: measuring the height of a water container; selecting a preset water level according to the height of the water container; measuring the temperature of the water container at the preset water level and the temperature of the water in the water container in real time, and controlling the water outlet to discharge water; calculating the temperature difference between the temperature at the preset water level of the water container and the temperature of the water in the water container, and judging whether a water stop condition is met based on the temperature difference; wherein the water stop condition includes: the temperature difference is within a preset temperature difference range; if not, controlling the water outlet to continue discharging water and returning to continue measuring; if so, controlling the water outlet to stop discharging water. The embodiment of the present invention automatically judges whether the amount of water received in the water container has reached the preset water level based on the temperature difference between the preset water level of the water container and the water in the water container, and then controls the water outlet to continue discharging water or stop discharging water, which is not only convenient and accurate, but also avoids waste of water resources.

Description

Technical Field

[0001] The present invention relates to the technical field of water level detection, and in particular to a water level detection method and device for a water purifier, and a water purifier. Background Art

[0002] At present, there are many types of water purifiers on the market, and they tend to be intelligent. However, during the use of the water purifier, the water purifier cannot automatically determine whether the water volume in the water container has reached the preset water level. It can only manually shut off the water outlet through human observation. There is a situation where the user puts down the water container but temporarily leaves. If the water purifier is turned off first, it needs to be started again, which will reduce the service life of the water purifier in the long run. If the water purifier is not turned off first, the water container will overflow, resulting in a waste of water resources. Summary of the Invention

[0003] The purpose of the present invention is to provide a water level detection method and device for a water purifier and a water purifier, aiming to solve the problem that the existing water purifier cannot automatically determine whether the water amount in the water container has reached a preset water level.

[0004] To solve the above technical problems, an embodiment of the present invention provides a water level detection method for a water purifier, which is applied to a water purifier including a water outlet, including:

[0005] Measure the height of the water container;

[0006] Selecting a preset water level according to the height of the water container;

[0007] measuring in real time the temperature of the preset water level of the water container and the temperature of the water in the water container, and controlling the water discharge from the water outlet;

[0008] Calculating the temperature difference between the temperature at a preset water level of the water container and the temperature of the water in the water container, and determining whether a water cut-off condition is met based on the temperature difference; wherein the water cut-off condition includes: the temperature difference is within a preset temperature difference range;

[0009] If the water stop condition is not met, the water outlet is controlled to continue to discharge water and the measurement is returned to continue;

[0010] If the water stop condition is met, the water outlet is controlled to stop discharging water.

[0011] In some embodiments, the water outage condition includes: the temperature difference result is within a preset temperature difference range within a continuous preset time range.

[0012] In some embodiments, the water purifier further includes a first temperature measuring component and a second temperature measuring component disposed at different positions, and before the step of measuring the height of the water container, further includes:

[0013] By rotating the first temperature measuring component and the second temperature measuring component so that the first temperature measuring component and the second temperature measuring component point to a specified position and measure the temperature, calibration is performed based on the temperature measurement results to determine whether the first temperature measuring component and the second temperature measuring component are working properly; wherein the pointing to the specified position is pointing to the air;

[0014] If it works normally, the first temperature measuring component and the second temperature measuring component are used to perform container detection to determine whether there is a water container below the water outlet. If there is no water container, the water outlet is controlled not to discharge water, and the container detection is repeated.

[0015] In some embodiments, the steps of rotating the first temperature measuring component and the second temperature measuring component so that the first temperature measuring component and the second temperature measuring component point to a specified position and measure the temperature, performing calibration based on the temperature measurement results, and determining whether the first temperature measuring component and the second temperature measuring component are working properly include:

[0016] Rotate the first temperature measuring component and the second temperature measuring component to a horizontal position, and obtain the air temperature T1 and the air temperature T2 measured by the first temperature measuring component and the second temperature measuring component respectively;

[0017] When︱T1-T2︱≤T A When the first temperature measuring component and the second temperature measuring component are judged to be working normally; wherein, T A is the first preset temperature difference.

[0018] In some embodiments, the step of performing container detection by the first temperature measuring component and the second temperature measuring component to determine whether the water container exists below the water outlet includes:

[0019] Rotate the first temperature measuring component and / or the second temperature measuring component to point to a detection origin, and obtain the measured temperature T0 of the detection origin; wherein the detection origin is located below the water outlet;

[0020] When︱T0-T1︱≥T B and / or |T0-T2| ≥ T B , it is determined that there is a water container below the water outlet;

[0021] When︱T0-T1︱<T B and / or |T0-T2| < T B , it is determined that there is no water container below the water outlet;

[0022] Among them, T B is the second preset temperature difference.

[0023] In some embodiments, the first temperature measuring component and the second temperature measuring component are respectively located on the left and right sides of the water outlet, and the step of measuring the height of the water container includes:

[0024] Controlling the second temperature measuring component to rotate counterclockwise, and monitoring the real-time temperature T3 measured by the second temperature measuring component;

[0025] When︱T0-T3︱≥T B , stop the rotation of the second temperature measuring component and record the angle α between the second temperature measuring component and the horizontal position at this time;

[0026] Controlling the first temperature measuring component to rotate clockwise, and monitoring the real-time temperature T4 measured by the first temperature measuring component;

[0027] When︱T0-T4︱≥T B , stop the rotation of the first temperature measuring component and record the angle β between the first temperature measuring component and the horizontal position at this time;

[0028] The height h1 of the water container is calculated according to the angle α, the angle β, and the distance H between the water outlet and the detection origin.

[0029] In some embodiments, the step of selecting a preset water level according to the height of the water container includes:

[0030] The height of the preset water level on the water container is selected as h2=h1*K;

[0031] Wherein, K is a proportional coefficient, and the proportional coefficient is 60% to 90%.

[0032] In some embodiments, the step of controlling the water outlet to discharge water includes:

[0033] Get the water outlet temperature T set by the user 设 , obtain the container temperature T of the water container 容 ;

[0034] According to T 设 and T 容 The temperature difference is used to determine whether to change the actual water temperature of the water outlet;

[0035] When T 设 ≥T 容 +T C , or T 设 <T 容 -T C When the actual water outlet temperature is controlled to remain unchanged;

[0036] When T 容 ≤T 设 <T容 +T C When the actual water temperature at the water outlet is controlled to rise to at least T C ;

[0037] When T 容 -T C ≤T 设 <T 容 When the actual water temperature at the water outlet is controlled to be reduced by at least T C ;

[0038] Among them, T C It is the third preset temperature difference.

[0039] An embodiment of the present invention further provides a water level detection device for a water purifier, which is applied to a water purifier. The water purifier includes a water outlet, including:

[0040] A height measuring unit, used to measure the height of a water container;

[0041] a selection unit for selecting a preset water level according to the height of the water container;

[0042] a temperature measuring unit for measuring in real time the temperature of the water container at a preset water level and the temperature of the water in the water container, and controlling the water discharge from the water outlet;

[0043] a calculation unit for calculating a temperature difference between the temperature at a preset water level of the water container and the temperature of the water in the water container, and determining whether a water cut-off condition is met based on the temperature difference; wherein the water cut-off condition includes: the temperature difference is within a preset temperature difference range;

[0044] The control unit controls the water outlet to continue discharging water and returns to continue measuring if the answer is no; and controls the water outlet to stop discharging water if the answer is yes.

[0045] An embodiment of the present invention further provides a water purifier, comprising the water level detection device for the water purifier as described above.

[0046] An embodiment of the present invention provides a water level detection method and device for a water purifier, and a water purifier. The water purifier includes a water outlet, wherein the method comprises: measuring the height of a water container; selecting a preset water level based on the height of the water container; measuring the temperature of the water container at the preset water level and the temperature of the water in the water container in real time, and controlling the water outlet to discharge water; calculating the temperature difference between the temperature of the water container at the preset water level and the temperature of the water in the water container, and determining whether a water stop condition is met based on the temperature difference; wherein the water stop condition includes: the temperature difference is within a preset temperature difference range; if not, controlling the water outlet to continue discharging water and returning to continue measuring; if so, controlling the water outlet to stop discharging water. The embodiment of the present invention measures and compares the temperature of the water container at the preset water level and the temperature of the water in the water container, and automatically determines whether the water volume in the water container has reached the preset water level based on the temperature difference result, thereby controlling the water outlet to continue discharging water or stop discharging water. This is not only convenient and accurate, but also avoids waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] Figure 1 A schematic diagram of a first flow chart of a water level detection method for a water purifier provided in an embodiment of the present invention;

[0049] Figure 2 A second flow chart of a water level detection method for a water purifier provided by an embodiment of the present invention;

[0050] Figure 3 A schematic diagram of a sub-process of a water level detection method for a water purifier provided in an embodiment of the present invention;

[0051] Figure 4 A schematic diagram of another sub-flow of a water level detection method for a water purifier provided by an embodiment of the present invention;

[0052] Figure 5 A schematic diagram of another sub-flow of a water level detection method for a water purifier provided by an embodiment of the present invention;

[0053] Figure 6 A schematic diagram of another sub-flow of a water level detection method for a water purifier provided by an embodiment of the present invention;

[0054] Figure 7 A schematic structural diagram of a device used in a water level detection method for a water purifier provided in an embodiment of the present invention;

[0055] Figure 8 A schematic structural diagram of a water level detection device for a water purifier provided by an embodiment of the present invention;

[0056] Figure 9 A schematic diagram of the principle of measuring the height of a water container provided by an embodiment of the present invention.

[0057] in:

[0058] 1. Water outlet;

[0059] 2. The first temperature measurement component;

[0060] 3. Second temperature measurement component;

[0061] 4. Water container. DETAILED DESCRIPTION

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0063] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0064] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in the specification and appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0065] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0066] See also Figure 1 , Figure 1 This is a first flow chart of a water level detection method for a water purifier provided by an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a water level detection method for a water purifier, which is applied to a water purifier including a water outlet, and includes steps S10-S60:

[0067] S10, measuring the height of the water container;

[0068] S20, selecting a preset water level according to the height of the water container;

[0069] S30, measuring in real time the temperature of the water container at a preset water level and the temperature of the water in the water container, and controlling the water outlet to discharge water;

[0070] S40, calculating the temperature difference between the temperature at a preset water level of the water container and the temperature of the water in the water container, and determining whether a water cut-off condition is met based on the temperature difference; wherein the water cut-off condition includes: the temperature difference is within a preset temperature difference range;

[0071] S50: If the water stop condition is not met, controlling the water outlet to continue discharging water and returning to continue measuring;

[0072] S60: If the water stop condition is met, control the water outlet to stop discharging water.

[0073] In the embodiment of the present invention, the height of the water container is first measured, and a preset water level is selected according to the needs of the user. By measuring and comparing the temperature at the preset water level of the water container and the temperature of the water in the water container, when the water in the water container has not reached the preset water level, the temperature at the preset water level of the water container and the temperature of the water in the water container are quite different. As the water in the water container increases, the temperature at the preset water level of the water container and the temperature of the water in the water container become closer and closer, until the water in the water container reaches near the preset water level, and the temperature difference between the two is maintained within the preset temperature difference range, it can be automatically determined whether the water amount in the water container has reached the preset water level, and then the water outlet is controlled to continue to discharge water or stop discharging water. This is not only convenient and accurate, but also avoids waste of water resources.

[0074] In some embodiments, the water outage condition includes: the temperature difference result is within a preset temperature difference range within a continuous preset time range.

[0075] In this embodiment, when the water in the water container reaches a predetermined level, the temperature difference between the temperature at the predetermined level and the temperature of the water in the container is maintained within a predetermined temperature difference range. To prevent the water in the water container from failing to reach or exceeding the predetermined level, the temperature difference must be maintained within the predetermined temperature difference range for a predetermined period of time. More specifically, the predetermined temperature difference range is 0-3°C, and the predetermined continuous time is 3 seconds. This ensures that the water in the water container reaches the predetermined level, thereby preventing misjudgments.

[0076] See also Figure 2 , Figure 2 This is a second flow chart of a water level detection method for a water purifier provided by an embodiment of the present invention. Figure 2 As shown, the water purifier further includes a first temperature measuring component and a second temperature measuring component arranged at different positions. Before the step of measuring the height of the water container, steps S70-S80 are also included:

[0077] S70: Rotate the first temperature measuring component and the second temperature measuring component so that they point to designated positions and measure temperature. Calibrate based on the temperature measurement results to determine whether the first temperature measuring component and the second temperature measuring component are operating normally. The pointing to the designated position is pointing to air.

[0078] In this step, the first temperature measuring component and the second temperature measuring component are calibrated, and the two temperature measuring components are rotated to measure the air temperature respectively. When there is no abnormality in the first temperature measuring component and the second temperature measuring component, the temperature measurement results of the two temperature measuring components are close to each other and are close to the air temperature. According to the temperature measurement results of the two temperature measuring components, it can be judged whether the first temperature measuring component and the second temperature measuring component are working normally. Specifically, an air temperature measuring component can be set for further comparison with the first temperature measuring component and the second temperature measuring component to prevent abnormalities in both temperature measuring components.

[0079] S80: If the operation is normal, perform container detection through the first temperature measuring component and the second temperature measuring component to determine whether there is a water container below the water outlet. If there is no water container, control the water outlet not to discharge water and repeat the container detection.

[0080] In this step, the temperature of the water container is different from the temperature of the air. When the water container is placed under the water outlet and when there is no water container placed under the water outlet, the temperature measurement results of the two temperature measuring components under the water outlet are different. Therefore, the container can be detected by the two temperature measuring components, which is convenient for the subsequent operation of the water purifier.

[0081] See also Figure 3-6 , Figure 3-6 This is a sub-flow diagram of a water level detection method for a water purifier provided by an embodiment of the present invention.

[0082] like Figure 3 As shown, the steps of rotating the first temperature measuring component and the second temperature measuring component so that the first temperature measuring component and the second temperature measuring component point to a specified position and measure the temperature, calibrating according to the temperature measurement results, and determining whether the first temperature measuring component and the second temperature measuring component are working properly include S101-S102:

[0083] S101, rotating the first temperature measuring component and the second temperature measuring component to a horizontal position, and obtaining the air temperature T1 and the air temperature T2 measured by the first temperature measuring component and the second temperature measuring component respectively;

[0084] In this step, when the first temperature measuring component and the second temperature measuring component are rotated to a horizontal position, regardless of whether a water container is provided under the water outlet, the temperature measured by the two temperature measuring components is the air temperature. Specifically, the two temperature measuring components can be rotated to a horizontal position in the same direction for temperature measurement, and synchronously rotated to other directions to measure the air temperature in multiple directions to ensure that there is no abnormality in the two temperature measuring components.

[0085] S102, when︱T1-T2︱≤T A When the first temperature measuring component and the second temperature measuring component are judged to be working normally; wherein, T A is the first preset temperature difference.

[0086] In this step, the air temperature T1 and the air temperature T2 measured by the first temperature measuring component and the second temperature measuring component are compared. When the absolute value of the temperature difference between the two is not greater than the first preset temperature difference, it can be determined that there is no abnormality in the two temperature measuring components. Specifically, the first preset temperature difference T A 1°C, that is, the air temperature T1 and the air temperature T2 measured by the first temperature measuring component and the second temperature measuring component cannot exceed 1°C, to avoid excessive difference in the air temperature measured by the first temperature measuring component and the second temperature measuring component due to air flow or a large distance between the two temperature difference components.

[0087] like Figure 4 As shown, the step of performing container detection by the first temperature measuring component and the second temperature measuring component to determine whether there is the water container below the water outlet includes S201-S203:

[0088] S201: Rotate the first temperature measuring component and / or the second temperature measuring component to point to a detection origin, and obtain the measured temperature T0 of the detection origin; wherein the detection origin is located below the water outlet;

[0089] S202, when︱T0-T1︱≥T B and / or |T0-T2| ≥ T B , it is determined that there is a water container below the water outlet;

[0090] S203, when︱T0-T1︱<T B and / or |T0-T2| < T B , it is determined that there is no water container below the water outlet;

[0091] Among them, T B is the second preset temperature difference.

[0092] In this embodiment, a water container is placed below the water outlet. If a water container is present, the detection origin points to the water container, and the temperature of the detection origin obtained is the temperature of the water container. If a water container is not present, the temperature of the detection origin obtained is the air temperature. There is a certain temperature difference between the temperature of the water container and the air temperature. When the difference between the obtained detection origin temperature and the air temperature exceeds a second preset temperature difference, it can be determined that a water container is present below the water outlet. If the temperature difference is not greater than the second preset temperature difference, it can be determined that no water container is present below the water outlet. Specifically, the second preset temperature difference is set to 3°C. That is, when the obtained detection origin temperature and the air temperature exceed 3°C, it can be determined that a water container is present below the water outlet. When the obtained detection origin temperature and the air temperature do not exceed 3°C, it can be determined that no water container is present below the water outlet.

[0093] like Figure 5 As shown, the first temperature measuring component and the second temperature measuring component are respectively located on the left and right sides of the water outlet, and the step of measuring the height of the water container includes S301-S305:

[0094] S301, controlling the second temperature measuring component to rotate counterclockwise, and monitoring the real-time temperature T3 measured by the second temperature measuring component;

[0095] S302, when︱T0-T3︱≥T B , stop the rotation of the second temperature measuring component and record the angle α between the second temperature measuring component and the horizontal position at this time;

[0096] S303, controlling the first temperature measuring component to rotate clockwise, and monitoring the real-time temperature T4 measured by the first temperature measuring component;

[0097] S304, when︱T0-T4︱≥T B , stop the rotation of the first temperature measuring component and record the slot at this time;

[0098] S305 , calculating the height h1 of the water container according to the angle α, the angle β, and the distance H between the water outlet and the detection origin.

[0099] In this embodiment, the first temperature measuring component and the second temperature measuring component are respectively located on the left and right sides of the water outlet, and the second temperature measuring component rotates counterclockwise. B When the edge of the water container and the air meet, the second temperature measuring component points to the edge of the water container. Similarly, when ︱T0-T4︱≥T B When the first temperature measuring component points to the edge of the water container, both temperature measuring components record the angles between themselves and the horizontal position, which are angles α and β respectively. The height of the water container can be calculated based on the characteristics of the triangle.

[0100] See also Figure 9 , Figure 9 Schematic diagram of the principle of measuring the height of a water container provided by an embodiment of the present invention. Figure 9 As shown, according to the characteristics of similar triangles: Where h is the distance between the water outlet and the top of the water container, we can get: Calculate the height of the water container: h1 = Hh.

[0101] In some embodiments, the step of selecting a preset water level according to the height of the water container includes:

[0102] The height of the preset water level on the water container is selected as h2=h1*K;

[0103] Wherein, K is a proportional coefficient, and the proportional coefficient is 60% to 90%.

[0104] In this embodiment, the preset water level is selected according to the height of the water container. In actual application scenarios, the selection of the preset water level is related to the water outlet speed. In order to avoid overflow of water in the water container, the proportional coefficient K can be selected to a relatively small value to avoid waste of water resources.

[0105] like Figure 6 As shown, the step of controlling the water outlet to discharge water includes S401-S405:

[0106] S401, obtain the water outlet temperature T set by the user 设 , obtain the container temperature T of the water container 容 ;

[0107] S402, according to T 设 and T 容 The temperature difference is used to determine whether to change the actual water temperature of the water outlet;

[0108] S403, when T 设 ≥T 容 +T C , or T 设 <T 容 -T C When the actual water outlet temperature is controlled to remain unchanged;

[0109] S404, when T 容 ≤T 设 <T 容 +T C When the actual water temperature at the water outlet is controlled to rise to at least T C ;

[0110] S405, when T 容 -T C ≤T设 <T 容 When the actual water temperature at the water outlet is controlled to be reduced by at least T C ;

[0111] Among them, T C It is the third preset temperature difference.

[0112] In this step, in order to ensure that the temperature difference between the temperature at the preset water level of the water container and the temperature of the water in the water container can be more clearly compared, and to facilitate subsequent measurement of the temperature difference between the two to be maintained within the preset range, the temperature of the water container T 容 And the water outlet temperature T set by the user 设 The two should not be too close. When they are close, the water outlet temperature needs to be adjusted to facilitate the judgment of whether the water in the water container has reached the preset water level. C is 3℃, which is the temperature of the water container T 容 And the water outlet temperature T set by the user 设 When the temperature difference exceeds 3°C, it is easy to judge whether the water in the water container has reached the preset water level.

[0113] See also Figure 7 , Figure 7 This is a schematic diagram of the structure of a device used in a water level detection method for a water purifier provided by an embodiment of the present invention. Figure 7 As shown, the device used in the water level detection method of the water purifier includes a water outlet 1, a first infrared temperature measuring component 2 and a second infrared temperature measuring component 3. The first infrared temperature measuring component 2 and the second infrared temperature measuring component 3 can be rotatably arranged on the left and right sides of the water outlet 1 respectively, and the positions of the first infrared temperature measuring component 2 and the second infrared temperature measuring component 3 correspond to each other, and are used to detect the temperature in the water container 4 below the water outlet 1 of the water purifier.

[0114] In this embodiment, the infrared temperature measuring component can measure the temperature quickly and accurately, which is convenient for real-time temperature monitoring. The first infrared temperature measuring component 2 and the second infrared temperature measuring component 3 can be rotatably arranged on the left and right sides of the water outlet 1, respectively, to facilitate the calculation of the height of the water container 4.

[0115] See also Figure 8 , Figure 8 This is a schematic diagram of the structure of a water level detection device for a water purifier provided by an embodiment of the present invention. Figure 8 As shown, an embodiment of the present invention further provides a water level detection device 500 for a water purifier, which is applied to a water purifier. The water purifier includes a water outlet, including:

[0116] A height measuring unit 501 is used to measure the height of the water container;

[0117] A selection unit 502 selects a preset water level according to the height of the water container;

[0118] The temperature measuring unit 503 measures the temperature of the preset water level of the water container and the temperature of the water in the water container in real time, and controls the water discharge from the water outlet;

[0119] The calculation unit 504 calculates the temperature difference between the temperature at the preset water level of the water container and the temperature of the water in the water container, and determines whether a water cut-off condition is met based on the temperature difference; wherein the water cut-off condition includes: the temperature difference is within a preset temperature difference range;

[0120] The control unit 505 controls the water outlet to continue discharging water and returns to continue measuring if the answer is no; and controls the water outlet to stop discharging water if the answer is yes.

[0121] In the embodiment of the present invention, the height of the water container is first measured by the height measuring unit 501, the preset water level is selected by the selection unit 502, and the temperature at the preset water level of the water container and the temperature of the water in the water container are measured and compared by the temperature measuring unit 503 and the calculation unit 504. When the water in the water container does not reach the preset water level, the temperature at the preset water level of the water container and the temperature of the water in the water container are quite different. As the water in the water container increases, the temperature at the preset water level of the water container and the temperature of the water in the water container become closer and closer. Until the water in the water container reaches near the preset water level, the temperature difference between the two is maintained within the preset temperature difference range. It can be automatically determined whether the water amount in the water container has reached the preset water level, and the control unit 505 is used to control the water outlet to continue to discharge water or stop discharging water. This is not only convenient and accurate, but also avoids waste of water resources.

[0122] An embodiment of the present invention further provides a water purifier, comprising the water level detection device for the water purifier as described above.

[0123] In an embodiment of the present invention, the water purifier uses the water level detection device of the water purifier as described above. The water purifier can automatically determine whether the water amount in the water container has reached a preset water level. When the user puts down the water container and leaves temporarily, there is no need to turn off the water outlet of the water purifier. The water level detection device of the water purifier will automatically turn off the water outlet when the water amount in the water container reaches the preset water level. The water container will not overflow, thereby avoiding waste of water resources.

[0124] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A water level detection method for a water purifier, applied to a water purifier, wherein the water purifier includes a water outlet, characterized in that: include: Measure the height of the water container; Selecting a preset water level according to the height of the water container; measuring in real time the temperature of the preset water level of the water container and the temperature of the water in the water container, and controlling the water discharge from the water outlet; Calculating the temperature difference between the temperature at a preset water level of the water container and the temperature of the water in the water container, and determining whether a water cut-off condition is met based on the temperature difference; wherein the water cut-off condition includes: the temperature difference is within a preset temperature difference range; If the water stop condition is not met, the water outlet is controlled to continue to discharge water and the measurement is returned to continue; If the water stop condition is met, the water outlet is controlled to stop discharging water; The water purifier further includes a first temperature measuring component and a second temperature measuring component arranged at different positions; The first temperature measuring component and the second temperature measuring component are respectively located on the left and right sides of the water outlet, and the step of measuring the height of the water container includes: Rotate the first temperature measuring component and / or the second temperature measuring component to point to a detection origin, and obtain the measured temperature T0 of the detection origin; wherein the detection origin is located below the water outlet; Controlling the second temperature measuring component to rotate counterclockwise, and monitoring the real-time temperature T3 measured by the second temperature measuring component; When︱T0-T3︱≥T B When the rotation of the second temperature measuring component is stopped, the angle α between the second temperature measuring component and the horizontal position is recorded; wherein, T B is the second preset temperature difference; Controlling the first temperature measuring component to rotate clockwise, and monitoring the real-time temperature T4 measured by the first temperature measuring component; When︱T0-T4︱≥T B , stop the rotation of the first temperature measuring component and record the angle β between the first temperature measuring component and the horizontal position at this time; Calculate the height h1 of the water container according to the angle α, the angle β, and the distance H between the water outlet and the detection origin; Calculate the height of the water container: h1 = Hh; h is the distance between the water outlet and the top of the water container, and L is the distance between the first temperature measuring component and the second temperature measuring component.

2. The water level detection method for a water purifier according to claim 1, characterized in that: The water outage condition includes: the temperature difference result is within a preset temperature difference range within a continuous preset time range.

3. The water level detection method for a water purifier according to claim 1, characterized in that: Before the step of measuring the height of the water container, the method further comprises: By rotating the first temperature measuring component and the second temperature measuring component so that the first temperature measuring component and the second temperature measuring component point to a specified position and measure the temperature, judging whether the first temperature measuring component and the second temperature measuring component are working normally according to the temperature measurement results; wherein the pointing to the specified position is pointing to the air; If it works normally, the first temperature measuring component and the second temperature measuring component are used to perform container detection to determine whether there is a water container below the water outlet. If there is no water container, the water outlet is controlled not to discharge water, and the container detection is repeated.

4. The water level detection method for a water purifier according to claim 3, characterized in that: The steps of rotating the first temperature measuring component and the second temperature measuring component so that the first temperature measuring component and the second temperature measuring component point to a specified position and measure the temperature, performing calibration based on the temperature measurement results, and determining whether the first temperature measuring component and the second temperature measuring component are working properly include: Rotate the first temperature measuring component and the second temperature measuring component to a horizontal position, and obtain the air temperature T1 and the air temperature T2 measured by the first temperature measuring component and the second temperature measuring component respectively; When︱T1-T2︱≤T A When the first temperature measuring component and the second temperature measuring component are judged to be working normally; wherein, T A is the first preset temperature difference.

5. The water level detection method for a water purifier according to claim 4, characterized in that: The step of performing container detection by the first temperature measuring component and the second temperature measuring component to determine whether the water container exists below the water outlet includes: When︱T0-T1︱≥T B and / or |T0-T2| ≥ T B , it is determined that there is a water container below the water outlet; When︱T0-T1︱<T B and / or |T0-T2| < T B , it is determined that there is no water container below the water outlet.

6. The water level detection method for a water purifier according to claim 1, characterized in that: The step of selecting a preset water level according to the height of the water container comprises: The height of the preset water level on the water container is selected as h2=h1*K; Wherein, K is a proportional coefficient, and the proportional coefficient is 60% to 90%.

7. The water level detection method for a water purifier according to claim 1, characterized in that: The step of controlling the water outlet to discharge water includes: Get the water outlet temperature T set by the user 设 , obtain the container temperature T of the water container 容 ; According to T 设 and T 容 The temperature difference is used to determine whether to change the actual water temperature of the water outlet; When T 设 ≥T 容 +T C , or T 设 <T 容 -T C When the actual water outlet temperature is controlled to remain unchanged; When T 容 ≤T 设 <T 容 +T C When the actual water temperature at the water outlet is controlled to rise to at least T C ; When T 容 -T C ≤T 设 <T 容 When the actual water temperature at the water outlet is controlled to be reduced by at least T C ; Among them, T C It is the third preset temperature difference.

8. A water level detection device for a water purifier, applied to a water purifier, wherein the water purifier includes a water outlet, characterized in that: include: A height measuring unit, used to measure the height of a water container; a selection unit for selecting a preset water level according to the height of the water container; a temperature measuring unit for measuring in real time the temperature of the water container at a preset water level and the temperature of the water in the water container, and controlling the water discharge from the water outlet; a calculation unit for calculating a temperature difference between the temperature at a preset water level of the water container and the temperature of the water in the water container, and determining whether a water cut-off condition is met based on the temperature difference; wherein the water cut-off condition includes: the temperature difference is within a preset temperature difference range; The control unit controls the water outlet to continue discharging water if no, and returns to continue measuring; and controls the water outlet to stop discharging water if yes; The water purifier further includes a first temperature measuring component and a second temperature measuring component arranged at different positions; The first temperature measuring component and the second temperature measuring component are respectively located on the left and right sides of the water outlet, and the step of measuring the height of the water container includes: Rotate the first temperature measuring component and / or the second temperature measuring component to point to a detection origin, and obtain the measured temperature T0 of the detection origin; wherein the detection origin is located below the water outlet; Controlling the second temperature measuring component to rotate counterclockwise, and monitoring the real-time temperature T3 measured by the second temperature measuring component; When︱T0-T3︱≥T B When the rotation of the second temperature measuring component is stopped, the angle α between the second temperature measuring component and the horizontal position is recorded; wherein, T B is the second preset temperature difference; Controlling the first temperature measuring component to rotate clockwise, and monitoring the real-time temperature T4 measured by the first temperature measuring component; When︱T0-T4︱≥T B , stop the rotation of the first temperature measuring component and record the angle β between the first temperature measuring component and the horizontal position at this time; Calculate the height h1 of the water container according to the angle α, the angle β, and the distance H between the water outlet and the detection origin; Calculate the height of the water container: h1 = Hh; h is the distance between the water outlet and the top of the water container, and L is the distance between the first temperature measuring component and the second temperature measuring component.

9. A water purifier, characterized in that: It includes the water level detection device for a water purifier as described in claim 8.

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