Control method of tea bar machine and tea bar machine

Abstract

The invention relates to the technical field of tea bar machine heating, and particularly provides a control method of a tea bar machine and the tea bar machine. The control method of the tea bar machine comprises the following steps: acquiring a stable temperature reached by heating a kettle within a preset time after the kettle receives water, or acquiring a first duration required by heating the kettle to a preset temperature after the kettle receives water; determining the water receiving amount of the kettle according to the preset time and the stable temperature or according to the preset temperature and the first duration; according to the water receiving amount and the set target temperature, second duration time needed by the water received by the kettle to reach the target temperature is determined; and acquiring the actual heating temperature of the received water of the kettle, and selectively ending the heating operation of the kettle according to the actual temperature and the target temperature. By determining the water receiving amount of the kettle and determining the accurate heating time of the kettle according to the water receiving amount and the target temperature, the water received by the kettle is directly heated to the target temperature range, and accurate heating and temperature control of the kettle are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tea bar machine heating, and specifically provides a control method and a tea bar machine for a tea bar machine. Background Art

[0002] The water kettle on the existing tea bar machine does not have a water level monitoring function to save costs. Therefore, when heating the water kettle, the tea bar machine usually sets the heating time for the water kettle according to the set water volume and target temperature of the normal temperature water in the water kettle.

[0003] However, in the actual water usage scenario, the amount of water manually or automatically added by the user is likely to be inconsistent with the set water volume. When the water volume in the water kettle is lower than the set water volume, the water temperature in the water kettle exceeds the target temperature after heating, or when the water volume in the water kettle is higher than the set water volume, the water temperature in the water kettle is lower than the target temperature after heating. Usually, the water temperature in the water kettle seriously deviates from the target temperature after heating, and the heating temperature control of the water kettle by the tea bar machine is inaccurate, resulting in poor user experience.

[0004] Correspondingly, there is a need in the art for a new control method for a tea bar machine to solve the above problems. Summary of the Invention

[0005] In order to solve the above problems in the prior art, that is, to solve the problem of inaccurate heating temperature control of the water kettle by the tea bar machine.

[0006] In a first aspect, the present invention provides a control method for a tea bar machine, the tea bar machine including a water kettle, the control method comprising: obtaining a stable temperature reached by the water kettle after receiving water and being heated within a preset time, or obtaining a first duration required for the water kettle to be heated to a preset temperature after receiving water; determining the water receiving amount of the water kettle according to the preset time and the stable temperature or according to the preset temperature and the first duration; determining a second duration required for the water in the water kettle to reach the target temperature according to the water receiving amount and the set target temperature; obtaining the actual temperature of the water in the water kettle being heated, and selectively ending the heating operation of the water kettle according to the actual temperature and the target temperature.

[0007] In the case of the preferred technical solution of the above control method for a tea bar machine, the specific steps of "obtaining a stable temperature reached by the water kettle after receiving water and being heated within a preset time" include: the preset time includes a first preset time and a second preset time, the first preset time is greater than the second preset time, and the stable temperature is obtained at an interval of the second preset time after the water kettle is heated for the first preset time.

[0008] In the case of the preferred technical solution of the above control method for the tea bar machine, the specific steps of "selectively ending the heating operation for filling water into the kettle according to the actual temperature and the target temperature" include: during the continuous heating process of the kettle within the second duration, if the actual temperature is less than the target temperature, the heating operation for the kettle is maintained.

[0009] In the case of the preferred technical solution of the above control method for the tea bar machine, the specific steps of "selectively ending the heating operation for filling water into the kettle according to the actual temperature and the target temperature" further include: if the actual temperature is not less than the target temperature, the heating operation for the kettle is ended.

[0010] In the case of the preferred technical solution of the above control method for the tea bar machine, the specific steps of "selectively ending the heating operation for filling water into the kettle according to the actual temperature and the target temperature" further include: after the continuous heating of the kettle within the second duration ends, if the actual temperature is less than the target temperature, an intermittent heating operation is performed on the kettle; when the actual temperature is not less than the target temperature, the heating operation for the kettle is ended.

[0011] In the case of the preferred technical solution of the above control method for the tea bar machine, the specific steps of the intermittent heating operation of the kettle include: the kettle undergoes at least one heating duration and an interval duration within a time period, and the heating duration is less than the interval duration.

[0012] In the case of the preferred technical solution of the above control method for the tea bar machine, the control method further includes: when ending the heating operation for the kettle, prompting the user that the heating of the kettle is completed.

[0013] In the case of the preferred technical solution of the above control method for the tea bar machine, for "determining the water filling amount of the kettle according to the preset time and the stable temperature or according to the preset temperature and the first duration", the formula used to calculate the water filling amount is: m = pt / c(T1 - T0); where m is the mass of water, T0 is the temperature of water before heating, T1 is the temperature of water after heating; p is the heating power, t is the time, and c is the specific heat capacity of water.

[0014] In the case of the preferred technical solution of the above control method for the tea bar machine, for "determining the second duration required for the water in the kettle to reach the target temperature according to the water filling amount and the set target temperature", the formula used to calculate the second duration is: t = kcm(T1 - T0) / p; where k is a correction value.

[0015] In a second aspect, the present invention provides a tea bar machine, which includes a controller configured to execute the control method of the tea bar machine as described above.

[0016] Those skilled in the art can understand that the control method of the tea bar machine of the present invention includes: obtaining the stable temperature reached after the water kettle is heated within a preset time after receiving water, or obtaining the first duration required for the water kettle to be heated to a preset temperature; determining the water receiving amount of the water kettle according to the preset time and the stable temperature or according to the preset temperature and the first duration; determining the second duration required for the water in the water kettle to reach the target temperature according to the water receiving amount and the set target temperature; obtaining the actual temperature of the water being heated in the water kettle, and selectively ending the heating operation of the water kettle according to the actual temperature and the target temperature. By determining the water receiving amount of the water kettle and determining the accurate heating time of the water kettle according to the water receiving amount and the target temperature, the water in the water kettle can be directly heated to the target temperature range, improving the accurate heating and temperature control of the water kettle.

[0017] In addition, the tea bar machine further provided by the present invention based on the above technical solution, due to adopting the above control method of the tea bar machine, thus has the technical effects achieved by the above control method of the tea bar machine. Compared with the existing tea bar machines, the tea bar machine of the present invention has a better heating and temperature control effect, improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, in which:

[0019] Figure 1 is the main step flow chart of the control method of the tea bar machine of the present invention;

[0020] Figure 2 is the detailed step flow chart of the first embodiment of the control method of the tea bar machine of the present invention;

[0021] Figure 3 is the detailed step flow chart of the second embodiment of the control method of the tea bar machine of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0023] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0024] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] Based on the problem of inaccurate heating temperature control of the existing tea bar machine pointed out in the background art, the present invention provides a control method for a tea bar machine, aiming to accurately heat and control the temperature of the water kettle of the tea bar machine, improving the user experience.

[0026] Specifically, the tea bar machine of the present invention includes a water kettle, a heating element, a relay, and a controller. Among them, the controller is used to control the on / off state of the relay to supply power to / disable power to the heating element, thereby realizing the heating and temperature control of the water kettle. It should be noted that the heating element uses a PTC ceramic heating element.

[0027] It can be understood that generally, the heating element heats according to the set water volume and heating time. When the water receiving volume of the water kettle is less than the set water volume, the water temperature in the water kettle is higher than the target temperature after the water kettle is heated. Especially when the target temperature is the boiling water temperature, energy consumption is easily wasted; when the water receiving volume of the water kettle is greater than the set water volume, the water temperature in the water kettle is lower than the target temperature after the water kettle is heated, and it is necessary to repeatedly turn on and off the relay to enable the heating element to heat the water in the water kettle to the target temperature, with slow temperature adjustment and long time consumption. Therefore, as long as the specific water volume and heating time are determined, the water can be directly heated to the target temperature range, improving the accurate temperature control operation of the water kettle.

[0028] Specifically, as Figure 1 shown, the main steps of the control method of the tea bar machine of the present invention include:

[0029] S1. Obtain the stable temperature reached after the water kettle is heated within a preset time after receiving water, or obtain the first duration required for the water kettle to be heated to a preset temperature;

[0030] S2. Determine the water receiving volume of the water kettle according to the preset time and the stable temperature, or according to the preset temperature and the first duration;

[0031] S3. Determine the second duration required for the water received by the water kettle to reach the target temperature according to the water receiving volume and the set target temperature;

[0032] S4. Obtain the actual temperature of the water received by the water kettle being heated,

[0033] S5. Selectively end the heating operation of the kettle according to the actual temperature and the target temperature.

[0034] Among them, in step S2, the formula used to calculate the water intake is: m = pt / c(T1 - T0); where m is the mass of water, T0 is the water temperature before heating, T1 is the water temperature after heating; p is the heating power, t is the time; c is the specific heat capacity of water.

[0035] In step S3, the formula used to calculate the second duration is: t = kcm(T1 - T0) / p; where k is the correction value.

[0036] It can be understood that in steps S1 and S2, the heating element is used to heat the water in the kettle. The time required for the heating element to raise the same preset temperature value for different water intakes in the kettle is different, or the temperature increase of different water intakes in the kettle for the same heating time is also different. Therefore, under the known conditions of the heating power of the heating element, the specific heat capacity of water, and the initial water temperature of water, as long as the heating time (i.e., the preset time or the first duration) of the heating element and the temperature after heating (i.e., the stable temperature or the preset temperature) are determined according to the formula, the specific water intake in the kettle can be determined.

[0037] It should be noted that both the stable temperature and the preset temperature are less than the target temperature.

[0038] In steps S3 and S4, according to the preliminarily calculated water intake of the kettle and the set target heating temperature, the theoretical heating time (i.e., the second duration) for heating the kettle to the target temperature is calculated using the formula t = kcm(T1 - T0) / p. In this way, the water intake of the kettle can be directly heated to the target temperature range according to the theoretical heating time. It should be noted that the correction value k is used to make up for the calculation error caused by the actual heat loss of the heating element to improve the accuracy of the theoretical heating time.

[0039] Finally, in step S5, by comparing the actual temperature in the kettle with the target temperature, the heating of the kettle is fine-tuned to end the heating operation of the kettle.

[0040] Compared with the control method of the existing tea bar machine, the control method of the present invention directly heats the water in the kettle to the target temperature range, reduces the fine-tuning operation of the temperature, shortens the overall heating and water production time of the kettle, and the heating and temperature control of the tea bar machine are more accurate and fast. At the same time, the frequency of repeated heating of the heating element and the repeated on-off of the relay is correspondingly reduced, and the overall service life of the tea bar machine is extended.

[0041] The following details the control method of the tea bar machine of the present invention with two specific embodiments.

[0042] Embodiment 1

[0043] As Figure 2 shown, the specific steps of the control method of the tea bar machine in this embodiment include:

[0044] S101. After the kettle is heated for the first preset time, obtain the stable temperature at intervals of the second preset time;

[0045] S201. Determine the water receiving amount of the kettle according to the first preset time and the stable temperature;

[0046] S3. Determine the second duration required for the water in the kettle to reach the target temperature according to the water receiving amount and the set target temperature;

[0047] S401. During the heating process of the kettle within the second duration, if the actual temperature is less than the target temperature, maintain the heating operation of the kettle;

[0048] S402. If the actual temperature is not less than the target temperature, end the heating operation of the kettle;

[0049] S403. After the heating of the kettle ends within the second duration, if the actual temperature is less than the target temperature, the kettle is heated for at least the heating duration and the interval duration within one time period. When the actual temperature is not less than the target temperature, end the heating operation of the kettle. Wherein, the heating duration is less than the interval duration.

[0050] Exemplarily, set the inlet water temperature of the kettle of the tea bar machine to 20 °C, the first preset time to 20 seconds, and the second preset time to 5 seconds. The power of the heating element is 840 W, and the target temperature is 80 °C. Wherein, the specific heat capacity of water is 4.2*10 3 J / kg·°C.

[0051] In step S101, power is supplied to the heating element by turning on the relay to make the heating element work continuously for 20 seconds (i.e., the first preset time), and after turning off the relay and waiting for 5 seconds (i.e., the second preset time), the water temperature of the kettle is obtained and stabilized at 30 °C (i.e., the stable temperature).

[0052] In step S102, the water temperature T0 before heating = 20 °C, the water temperature T1 after heating = 30 °C, and the first preset time t is 20 seconds. According to the formula m = pt / c(T1 - T0), calculate the mass of water m = 400 g.

[0053] It should be noted that due to the residual heat of the heating element, the water temperature in the kettle will continue to rise. After the second preset time, a relatively accurate temperature can be obtained.

[0054] In step S3, under the condition that the calculated water receiving amount (400 g) and the target temperature (80 °C) are known, the second duration t = 100 seconds is calculated using the formula (t = kcm(T1 - T0) / p, k = 1). That is, it takes 100 seconds for the water in the kettle to be heated from 30 °C to 80 °C.

[0055] It should be noted that those skilled in the art can flexibly adjust the correction value k according to the actual heat loss condition of the heating element to obtain a more accurate heating time.

[0056] During the heating process, the temperature change of the water in the kettle is obtained in real time;

[0057] When the kettle is heated to 90 seconds, the actual temperature obtained is 75 °C. According to step S401, since the actual temperature (75 °C) is less than the target temperature (80 °C), the relay is not disconnected and the power supply operation to the heating element is maintained.

[0058] When the kettle is heated to 95 seconds, the actual temperature obtained is 80 °C. According to step S402, since the actual temperature (80 °C) is equal to the target temperature (80 °C), the relay is disconnected and the power supply operation to the heating element is stopped.

[0059] When the kettle finishes heating for 100 seconds, the actual temperature obtained is 75 °C. According to step S403, since the actual temperature (75 °C) is less than the target temperature (80 °C), the relay is turned on for 2 seconds (i.e., the heating duration) and turned off for 5 seconds (i.e., the interval duration) to intermittently and repeatedly supply power to the heating element. When the actual temperature (80 °C) in the kettle is equal to the target temperature (80 °C), the relay is disconnected and the power supply operation to the heating element is stopped.

[0060] Embodiment 2

[0061] As Figure 3 shown, the specific steps of the control method of the tea bar machine in this embodiment include:

[0062] S102. Obtain the first duration required for the water in the kettle to be heated to the preset temperature after receiving water;

[0063] S202. Determine the water receiving amount of the kettle according to the preset temperature and the first duration;

[0064] S3. Determine the second duration required for the water received in the kettle to reach the target temperature according to the water receiving amount and the set target temperature;

[0065] S401. During the heating process of the kettle within the second duration, if the actual temperature is less than the target temperature, then maintain the heating operation of the kettle;

[0066] S402. If the actual temperature is not less than the target temperature, end the heating operation of the kettle;

[0067] S403. After the heating of the kettle ends within the second duration, if the actual temperature is less than the target temperature, the kettle is heated for at least the heating duration and the interval duration within one time period. When the actual temperature is not less than the target temperature, end the heating operation of the kettle. Herein, the heating duration is less than the interval duration.

[0068] Exemplarily, set the inlet water temperature of the kettle of the tea bar machine to 20 °C and the preset temperature to 25 °C. The power of the heating element is 840 W and the target temperature is 80 °C. Herein, the specific heat capacity of water is 4.2*10 3 J / kg·°C.

[0069] In step S102, connect the relay to supply power to the heating element to raise the temperature inside the kettle, and record that the time required for the temperature inside the kettle to reach 25 °C (i.e., the preset temperature) is 20 seconds (the first duration).

[0070] In step S202, the water temperature T0 before heating is 20 °C, the water temperature T1 after heating is 25 °C, and the first duration t is 20 seconds. Calculate the mass m of water according to the formula m = pt / c(T1 - T0), and m = 800 g.

[0071] In step S3, under the condition that the calculated water intake (800 g) and the target temperature (80 °C) are known, calculate the second duration t = 160 seconds using the formula (t = kcm(T1 - T0) / p, k = 0.8). That is, it takes 160 seconds for the water in the kettle to be heated from 25 °C to 80 °C.

[0072] It should be noted that due to the residual heat of the heating element, the water temperature inside the kettle will continue to rise, and the calculated theoretical water intake will be on the high side. Therefore, those skilled in the art flexibly adjust the correction value k according to the actual heat loss situation and theoretical error of the heating element to obtain a more accurate heating time.

[0073] Obtain the temperature change of the water in the kettle in real time during the heating process;

[0074] When the kettle is heated to 150 seconds, the actual temperature obtained is 75 °C. According to step S401, since the actual temperature (75 °C) is less than the target temperature (80 °C), the relay is not disconnected and the power supply operation to the heating element is maintained.

[0075] When the kettle is heated to 155 seconds, the actual temperature obtained is 80 °C. According to step S402, since the actual temperature (80 °C) is equal to the target temperature (80 °C), the relay is disconnected and the power supply operation to the heating element is stopped.

[0076] When the kettle has been heated for 160 seconds, the actual temperature obtained is 75°C. According to step S403, since the actual temperature (75°C) is lower than the target temperature (80°C), the relay supplies power to the heating element intermittently in a pattern of being on for 2 seconds (i.e., the heating duration) and off for 5 seconds (i.e., the interval duration). When the actual temperature (80°C) inside the kettle equals the target temperature (80°C), the relay is turned off to stop power supply to the heating element.

[0077] In the above-mentioned first and second embodiments, after step S403, the control method further includes:

[0078] After the kettle has been continuously heated for the second duration, if the actual temperature is lower than the target temperature, the correction value is selectively increased according to the difference between the actual temperature and the target temperature.

[0079] Specifically, taking the first embodiment as an example, when the kettle has been heated for 100 seconds, the actual temperature obtained is 75°C. The actual temperature (75°C) is lower than the target temperature (80°C), and the difference between the target temperature and the actual temperature (75°C) is 5. Then the correction value k = (1 + difference / target temperature), so that after the kettle is heated for the second duration calculated after correction, it is closer to the target temperature. For example, when the water intake of the kettle is the same as that in the first embodiment, the second duration is 106 seconds.

[0080] In the above-mentioned first and second embodiments, after step S402, the control method further includes: During the heating process of the kettle for the second duration, if the actual temperature is not lower than the target temperature, the correction value is selectively decreased according to the difference between the calculated second duration and the actual duration.

[0081] Specifically, taking the first embodiment as an example, when the kettle has been heated for 95 seconds (i.e., the actual duration), the actual temperature obtained is 80°C. The actual temperature (80°C) equals the target temperature (80°C), and the difference between the second duration and the actual duration is 5. Then k = (1 - difference / second duration), so that after the kettle is heated for the second duration calculated after correction, it is closer to the target temperature. For example, when the water intake of the kettle is the same as that in the first embodiment, the second duration is 95 seconds.

[0082] Preferably, the control method of this tea bar machine further includes: When ending the heating operation of the kettle, prompting the user that the kettle heating is completed.

[0083] Specifically, in the above-mentioned first and second embodiments, when the water temperature inside the kettle reaches the target temperature, the user is prompted that the heating process has ended, so that the user can perform corresponding operations on the water intake of the kettle according to actual needs.

[0084] In a preferred embodiment, a sound - generating element such as a speaker that can be provided on the kettle can generate a sound to prompt the user that the heating process is over. In another preferred embodiment, an LED can be provided on the kettle to display different colors, thereby prompting the user that the heating process is over.

[0085] Finally, it should be noted that in the above - mentioned embodiments, the setting and selection of the numerical values of parameters such as the inlet water temperature, preset temperature, power of the heating element, target temperature, correction value k, first duration, second duration, actual duration, etc. of the kettle of the tea - bar machine are only for explaining the operation process and principle of the control method. In actual applications, those skilled in the art can flexibly adjust the specific numerical values or numerical ranges of the above - mentioned parameters according to the specific usage environment to meet the actual needs.

[0086] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A control method for a tea bar machine, the tea bar machine including a kettle, characterized in that, The control method includes: Obtaining the stable temperature reached after the water kettle is heated within a preset time after receiving water, or obtaining the first duration required for the water kettle to be heated to a preset temperature after receiving water; Determining the water receiving amount of the water kettle according to the preset time and the stable temperature or according to the preset temperature and the first duration; Determining the second duration required for the water received by the water kettle to reach the target temperature according to the water receiving amount and the set target temperature; Obtaining the actual temperature of the water received by the water kettle, and selectively ending the heating operation of the water kettle according to the actual temperature and the target temperature.

2. The control method of the tea bar machine according to claim 1, wherein The specific steps of "obtaining the stable temperature reached after the water kettle is heated within a preset time after receiving water" include: The preset time includes a first preset time and a second preset time, the first preset time is greater than the second preset time, and the stable temperature is obtained after the water kettle is heated for the first preset time and then at an interval of the second preset time.

3. The control method of the tea bar machine according to claim 1, characterized in that, The specific steps of "selectively ending the heating operation of the water received by the water kettle according to the actual temperature and the target temperature" include: During the continuous heating process of the water kettle within the second duration, if the actual temperature is less than the target temperature, the heating operation of the water kettle is maintained.

4. The control method of the tea bar machine according to claim 3, characterized in that, The specific steps of "selectively ending the heating operation of the water received by the water kettle according to the actual temperature and the target temperature" further include: If the actual temperature is not less than the target temperature, the heating operation of the water kettle is ended.

5. The control method of the tea bar machine according to claim 1, characterized in that The specific steps of "selectively ending the heating operation of the water received by the water kettle according to the actual temperature and the target temperature" further include: After the continuous heating of the water kettle ends within the second duration, if the actual temperature is less than the target temperature, an intermittent heating operation is performed on the water kettle; When the actual temperature is not less than the target temperature, the heating operation of the water kettle is ended.

6. The control method of the tea bar machine according to claim 5, characterized in that, The specific steps of the intermittent heating operation performed on the water kettle include: The water kettle undergoes at least the heating duration and the interval duration within one time period, and the heating duration is less than the interval duration.

7. The control method of the tea bar machine according to any one of claims 4 to 6, characterized in that, The control method further includes: When ending the heating operation of the water kettle, prompting the user that the water kettle heating is completed.

8. The control method of the tea bar machine according to claim 1, characterized in that, "determining the water receiving amount of the kettle according to the preset time and the stable temperature or according to the preset temperature and the first duration", the formula used to calculate the water receiving amount is: m = pt / c(T1 - T0); where, m is the mass of water, T0 is the temperature of water before heating, T1 is the temperature of water after heating; p is the heating power, t is the time, and c is the specific heat capacity of water.

9. The control method of the tea bar machine according to claim 8, characterized in that, For "determining the second duration required for the water received by the water kettle to reach the target temperature according to the water receiving amount and the set target temperature", the formula used to calculate the second duration is: t = kcm(T1 - T0) / p; where k is a correction value.

10. A tea bar machine, comprising a controller, characterized in that, The controller is configured to be capable of executing the control method of the tea bar machine according to any one of claims 1 to 9.

Images