A bubble generating system and a control method thereof

Abstract

The present application relates to a kind of bubble generation system and its control method, bubble generation system includes: bubble generator, with waterway import, gas path import and bubble water outlet;Heating module is located on the water outlet pipe that is connected with the bubble water outlet of bubble generator;Characterized in that further include: first bubble detection module, for detecting the bubble content between the bubble water outlet of bubble generator and the water inlet end of heating module;Second bubble detection module, for detecting the bubble content of the water outlet end of heating module;Adjustable valve is located on the pipeline between heating module and second bubble detection module;Controller, with first bubble detection module, second bubble detection module and adjustable valve electric signal connection, is configured as: according to the detection result of first bubble detection module and second bubble detection module, to adjust the opening of adjustable valve correspondingly.The bubble generation system can make bubble content reach standard, and can keep water temperature always meet the requirement, reach the best use effect of user.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a bubble generating system for water purifiers, water heaters and other household appliances and a control method thereof. BACKGROUND

[0002] With the further improvement of people's demand for a healthy life, the diversification of water demand gradually emerges, for example, users want water to have the effect of removing pesticide residues in some cleaning of fruits and vegetables. There is a bubble generating device on the current market that can produce ultra-micro bubble water, which mixes gas into water in micro-nano size, further forms small molecular water clusters, and when cleaning objects, the ultra-micro bubble occurs cavitation and rupture, enhancing the cleaning effect of dirt on the cleaned objects. Now such a bubble generating device that can produce micro-bubbles is favored by more and more market consumers because it has good cleaning function and can bring better experience to users.

[0003] Although micro-nano bubbles can greatly improve the cleaning effect of water, but the cleaning effect on some stubborn stains is still not enough. When cleaning objects, the temperature of the cleaning medium is a very important influencing factor, because temperature can accelerate the dissolution of pollutants in water and also soften stubborn stains, and in cold weather, using hot water to clean brings users more self-evident happiness experience. For example, a Chinese invention patent with application number CN202110374414.0 (application publication number CN115235110A) discloses a water heater, which comprises a water system, a gas system, a heating system and a mixing device; the water system comprises a water conveying pipeline, a first water outlet pipeline, a booster device and a first control valve, the water outlet end of the water conveying pipeline is connected with the mixing device, the water inlet end of the first water outlet pipeline is connected with the mixing device, the booster device is arranged on the first water outlet pipeline, and the first control valve is arranged on the water conveying pipeline; the gas system comprises a gas conveying pipeline and a second control valve, the gas conveying pipeline is used for conveying gas to the mixing device, and the second control valve is arranged on the gas conveying pipeline; the heating system is used for heating the water passing through the water conveying pipeline.

[0004] Although the above-mentioned water heater not only can produce ordinary hot water, but also can produce hot water with high gas content, which can greatly enrich the user's water experience, but the above-mentioned water heater has the following use limitations: the storage time of gas in water is related to temperature, the lower the temperature, the higher the stability of gas in water, and the higher the water temperature, the poorer the stability of gas, the micro-bubbles are easy to break, agglomerate and increase in volume, and then diffuse from the water, losing the cleaning effect of micro-bubbles. Therefore, due to the inherent contradiction between the increase of water temperature and the stability of micro-bubbles, it is difficult to ensure that the water temperature and the content of bubble water in the above-mentioned water heater can meet the requirements, and therefore further improvement is needed for the prior art. SUMMARY

[0005] The first technical problem to be solved by the present application is to provide a bubble generating system which can both meet the bubble content requirement and keep the outlet water temperature meeting the requirement.

[0006] The second technical problem to be solved by the present application is to provide a control method of the bubble generating system which can both meet the bubble content requirement and keep the outlet water temperature meeting the requirement.

[0007] The third technical problem to be solved by the present application is to provide a control method of the bubble generating system which can both meet the bubble content requirement and maximize the bubble water flow.

[0008] The technical solution adopted by the present application to solve the first technical problem is a bubble generating system comprising:

[0009] a bubble generator having a water inlet, an air inlet and a bubble water outlet;

[0010] a heating module arranged on an outlet pipe connected to the bubble water outlet of the bubble generator;

[0011] characterized in that it further comprises:

[0012] a first bubble detection module for detecting the bubble content between the bubble water outlet of the bubble generator and the water inlet of the heating module;

[0013] a second bubble detection module for detecting the bubble content of the water outlet of the heating module;

[0014] an adjustable valve arranged on a pipe between the heating module and the second bubble detection module;

[0015] a controller electrically connected to the first bubble detection module, the second bubble detection module and the adjustable valve, and configured to adjust the opening degree of the adjustable valve according to the detection results of the first bubble detection module and the second bubble detection module.

[0016] To achieve that the water inlet of the bubble generator is further connected to a raw water inlet pipe, and a booster pump connected to the controller is further arranged on the raw water inlet pipe, and the controller is further configured to adjust the voltage of the booster pump according to the detection results of the first bubble detection module and the second bubble detection module.

[0017] To achieve the filtration of the raw water and improve the water quality of the bubble water, a filter core assembly is further arranged on the raw water inlet pipe downstream of the booster pump.

[0018] To achieve the detection of the outlet water temperature, a first temperature sensor for detecting the water temperature of the water outlet of the heating module is further included.

[0019] To realize the water inlet temperature detection of the heating module, so as to control the heating power of the heating module, the second temperature sensor for detecting the water temperature between the bubble water outlet of the bubble generator and the water inlet end of the heating module is further included.

[0020] Preferably, the heating module is a heat exchanger.

[0021] Preferably, the first bubble detection module and the second bubble detection module are both turbidity sensors.

[0022] Preferably, the adjustable valve is a back pressure valve.

[0023] The technical solution adopted by the present application to solve the second technical problem is: a control method of the bubble generating system as described above, characterized in that it comprises the following steps:

[0024] Step 1: setting the water outlet temperature T of the heating module;

[0025] Step 2: setting the heating power of the heating module as a preset value, and calculating the water outlet flow rate F of the heating module according to the pre-stored relationship between the water outlet temperature and the water outlet flow rate of the heating module;

[0026] Step 3: calculating the opening of the adjustable valve;

[0027] Step 4: calculating the voltage of the booster pump, and starting the booster pump at the voltage;

[0028] Step 5: detecting the water outlet temperature t2 in real time through the first temperature sensor, and determining whether the water outlet temperature t2 is equal to T, if yes, then turning to Step 6; if no, then adjusting the voltage of the booster pump through the PID algorithm, and continuing to detect the water outlet temperature t2 through the first temperature sensor;

[0029] Step 6: collecting the result y1 detected by the first bubble detection module and the result y2 detected by the second bubble detection module in real time, and determining whether y2 is greater than or equal to a*y1, a being a set bubble-free retention coefficient, 0

[0030] Step 7: saving the current voltage of the booster pump and the opening of the adjustable valve as the next reference data.

[0031] In the above scheme, the calculation method of the opening of the adjustable valve in Step 3 and the voltage of the booster pump in Step 4 is:

[0032] Different adjustable valve openings are set in sections, the voltage of the booster pump is adjusted, the flow rate under the working of the booster pump at different voltages is obtained, and the voltage of the booster pump and the opening of the adjustable valve are obtained according to the water outlet flow rate F.

[0033] The technical scheme adopted by the present application to solve the third technical problem is: a control method of the bubble generating system, characterized by comprising the following steps:

[0034] Step a, setting the outlet water temperature T of the heating module;

[0035] Step b, calculating the opening degree of the adjustable valve;

[0036] Step c, calculating the voltage of the booster pump, and starting the booster pump at the voltage;

[0037] Step d, adjusting the heating power of the heating module through the PID algorithm;

[0038] Step e, detecting the outlet water temperature t2 in real time through the first temperature sensor, and determining whether the outlet water temperature t2 is equal to T, if yes, turning to step f; if no, turning to step d;

[0039] Step f, adjusting the opening degree of the adjustable valve through the PID algorithm;

[0040] Step g, collecting the result y1 detected by the first bubble detection module and the result y2 detected by the second bubble detection module in real time, and determining whether y2 is greater than or equal to a*y1, a being a set bubble-free retention coefficient, 0

[0041] Step h, determining whether the heating power of the heating module reaches the maximum value Pmax, if yes, turning to step i; if no, adjusting the voltage of the booster pump through the PID algorithm, and turning to step e;

[0042] Step i, saving the current voltage of the booster pump, the opening degree of the adjustable valve and the heating power of the heating module as the next reference data.

[0043] Compared with the prior art, the present application has the advantages that: by setting the first bubble detection module and the second bubble detection module, the first bubble detection module is used to detect the bubble content between the bubble water outlet of the bubble generator and the water inlet end of the heating module, and the second bubble detection module is used to detect the bubble content of the water outlet end of the heating module, so as to detect the content change of the bubble water after passing through the heating module, so as to adjust the opening degree of the adjustable valve to make the bubble content of the water outlet end meet the requirements, and thus the bubble generating system can not only make the bubble content meet the requirements, but also keep the outlet water temperature always meeting the requirements, achieving the best use effect of the user. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 FIG. 1 is a water path schematic diagram of the bubble generating system in the first embodiment of the present application. DETAILED DESCRIPTION

[0045] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0046] Example 1:

[0047] like Figure 1 As shown, the bubble generation system in this embodiment includes a bubble generator 1, a heating module 2, a first bubble detection module 3, a second bubble detection module 4, an adjustable valve 5, and a controller. The adjustable valve 5 is a valve with adjustable flow area. It is used to adjust the pressure of the water flow within the heating module 2. Closing the adjustable valve 2 increases the water pressure. In this embodiment, the adjustable valve 5 is a backpressure valve.

[0048] The bubble generator 1 has a water inlet 11, an air inlet 12 and a bubble water outlet 13; the water inlet 11 of the bubble generator 1 is also connected to a raw water inlet pipe b, the air inlet 12 is connected to an air inlet pipe c, and the bubble water outlet 13 of the bubble generator 1 is connected to a water outlet pipe a, gas is introduced into the bubble generator 1 through the air inlet pipe c, and water is introduced into the bubble generator 1 through the raw water inlet pipe b, so that mixing occurs in the bubble generator 1 to produce bubble water.

[0049] In this embodiment, a booster pump 6 is also provided on the raw water inlet pipe b. A filter element assembly 7 is also provided downstream of the booster pump 6. This filter element assembly 7 typically comprises a filter medium such as PP cotton or activated carbon, primarily providing coarse filtration. This bubble generation system can be used in a water purifier or water heater. The heating module 2 is provided on the outlet pipe a, connected to the bubble water outlet 13 of the bubble generator 1, for heating the bubble water. In this embodiment, the heating module 2 is a heat exchanger. Alternatively, it may be a heating tube, microwave heater, or other device capable of heating water.

[0050] The first bubble detection module 3 is used to detect the bubble content between the bubble water outlet 13 of the bubble generator 1 and the water inlet of the heating module 2; the second bubble detection module 4 is used to detect the bubble content at the water outlet of the heating module 2; an adjustable valve 5 is provided in the pipeline between the heating module 2 and the second bubble detection module 4; a controller is electrically connected to the first bubble detection module 3, the second bubble detection module 4, the adjustable valve 5, and the booster pump 6, and is configured to adjust the opening of the adjustable valve 5 and the voltage of the booster pump 6 according to the detection results of the first and second bubble detection modules 3 and 4. In this embodiment, both the first and second bubble detection modules 3 and 4 are turbidity sensors. Because microbubbles mixed into water significantly change its light transmittance, turbidity sensors can be used to indicate the microbubble content. Of course, other existing sensors such as TDS sensors can also be used.

[0051] A first temperature sensor 81 is further included for detecting the water temperature at the water outlet of the heating module 2, and a second temperature sensor 82 is further included for detecting the water temperature between the bubble water outlet 13 of the bubble generator 1 and the water inlet of the heating module 2.

[0052] The control method of the bubble generating system in the embodiment includes the following steps:

[0053] Step 1: Set the water outlet temperature T of the heating module;

[0054] Step 2: Set the heating power of the heating module to a preset value, and calculate the water outlet flow rate F of the heating module according to a pre-stored relationship between the water outlet temperature of the heating module and the water outlet flow rate;

[0055] Step 3: Calculate the opening degree of the adjustable valve;

[0056] Step 4: Calculate the voltage of the booster pump, and start the booster pump at the voltage;

[0057] Step 5: Detect the water outlet temperature t2 in real time through the first temperature sensor, and determine whether the water outlet temperature t2 is equal to T. If yes, go to Step 6; if no, adjust the voltage of the booster pump through a PID algorithm, and continue to detect the water outlet temperature t2 through the first temperature sensor;

[0058] Step 6: Collect the result y1 detected by the first bubble detection module and the result y2 detected by the second bubble detection module in real time, and determine whether y2 is greater than or equal to a*y1, a being a preset non-bubble retention coefficient, 0

[0059] Step 7: Save the current voltage of the booster pump and the opening degree of the adjustable valve as reference data for the next time.

[0060] The calculation method of the opening degree of the adjustable valve in Step 3 and the voltage of the booster pump in Step 4 is as follows:

[0061] Different opening degrees of the adjustable valve are set in sections, the voltage of the booster pump is adjusted, the flow rate under the working condition of the booster pump at different voltages is obtained, and the voltage of the booster pump and the opening degree of the adjustable valve are obtained according to the water outlet flow rate F.

[0062] In this embodiment, the water flow pressure in the heating module 2 is changed by changing the opening of the adjustable valve 5, thereby maintaining the stability of the micro-nano bubbles in the bubble water. However, due to the increase in water flow pressure, the working pressure of the bubble generator 1 is affected, which will increase the outlet pressure of the booster pump 6, and further affect the output flow of the booster pump 6. The relationship is: the adjustable valve 5 is opened smaller---the pressure of the bubble generator 1 increases---the output flow of the booster pump 6 decreases; by adjusting the voltage of the booster pump 6, the water outlet of the booster pump 6 can be adjusted. On the one hand, the flow rate at the outlet of the booster pump 6 can be adjusted to supplement the flow rate after the booster pump 6. On the other hand, the pressure after the booster pump 6 can be further increased.

[0063] In this embodiment, turbidity (controlling microbubble content) and booster pump output (controlling flow rate and, consequently, outlet water temperature) are interactively regulated on a regular basis. The booster pump voltage is first adjusted to ensure that the bubbled water temperature after heat exchange meets the required outlet temperature. The turbidity is then adjusted by adjusting the opening of the adjustable valve to achieve a level that satisfies the microbubble retention requirement. This cycle, based on the dual parameters of turbidity and flow rate, achieves both turbidity (and bubble content) compliance and temperature maintenance, resulting in optimal user experience.

[0064] Example 2:

[0065] Different from the first embodiment, the control method of the bubble generating system in this embodiment is characterized by comprising the following steps:

[0066] Step a, setting the water outlet temperature T of the heating module;

[0067] Step b, calculating the opening of the adjustable valve;

[0068] Step c, calculating the voltage of the booster pump and starting the booster pump with the voltage;

[0069] Step d, adjusting the heating power of the heating module by using a PID algorithm;

[0070] Step e: Detect the outlet water temperature t2 in real time through the first temperature sensor, and determine whether the outlet water temperature t2 is equal to T. If so, proceed to step f; if not, proceed to step d;

[0071] Step f, adjusting the opening of the adjustable valve by using a PID algorithm;

[0072] Step g, collecting the result y1 detected by the first bubble detection module and the result y2 detected by the second bubble detection module in real time, and determining whether y2 is greater than or equal to a*y1, where a is the set bubble-free retention coefficient, 0<a≤1; if yes, proceed to step h; if not, proceed to step f;

[0073] Step h, judging whether the heating power of the heating module reaches the maximum value Pmax, if yes, turning to step i; if no, adjusting the voltage of the booster pump by the PID algorithm, and turning to step e;

[0074] Step i, saving the current voltage of the booster pump, the opening of the adjustable valve and the heating power of the heating module as the next reference data.

[0075] In the embodiment, the turbidity and the output of the booster pump (i.e. the flow rate) are adjusted alternately in a certain period, and the turbidity is adjusted preferentially. That is, first, the opening of the adjustable valve is adjusted according to the deviation of the turbidity and the PID parameters of the turbidity. After the adjustable valve is adjusted, the turbidity will change, and the output of the booster pump will also change. At this time, the output of the booster pump is adjusted (generally reduced), and the heating power of the heating module will decrease. At this time, the output power of the booster pump is further increased. After the heating power of the heating module is stable, the turbidity is adjusted again. In this way, the turbidity and the flow rate are adjusted alternately, so that the turbidity and the maximum flow rate can be met, and the best use effect of the user can be achieved.

Claims

1. A bubble generating system comprising: The bubble generator (1) has a water inlet (11), an air inlet (12) and a bubble water outlet (13); A heating module (2) is provided on a water outlet pipe (a) connected to a bubble water outlet (13) of the bubble generator (1); It is characterized by also including: A first bubble detection module (3) is used to detect the bubble content between the bubble water outlet (13) of the bubble generator (1) and the water inlet end of the heating module (2); A second bubble detection module (4) is used to detect the bubble content at the water outlet of the heating module (2); An adjustable valve (5) is provided on the pipeline between the heating module (2) and the second bubble detection module (4); The controller is electrically connected to the first bubble detection module (3), the second bubble detection module (4) and the adjustable valve (5), and is configured to adjust the opening of the adjustable valve (5) accordingly based on the detection results of the first bubble detection module (3) and the second bubble detection module (4).

2. The bubble generating system according to claim 1, characterized in that: The water inlet (11) of the bubble generator (1) is also connected to a raw water inlet pipe (b), and the raw water inlet pipe (b) is also provided with a booster pump (6) connected to a controller. The controller is further configured to adjust the voltage of the booster pump (6) accordingly according to the detection results of the first bubble detection module (3) and the second bubble detection module (4).

3. The bubble generating system according to claim 2, characterized in that: The raw water inlet pipe (b) is also provided with a filter element assembly (7) located downstream of the booster pump (6).

4. The bubble generating system according to claim 2, wherein: It also includes a first temperature sensor (81) for detecting the water temperature at the water outlet of the heating module (2).

5. The bubble generating system according to claim 4, characterized in that: It also includes a second temperature sensor (82) for detecting the water temperature between the bubble water outlet (13) of the bubble generator (1) and the water inlet end of the heating module (2).

6. The bubble generating system according to claim 4 or 5, characterized in that: The heating module (2) is a heat exchanger.

7. The bubble generating system according to claim 4 or 5, characterized in that: The first bubble detection module (3) and the second bubble detection module (4) are both turbidity sensors.

8. The bubble generating system according to claim 4 or 5, characterized in that: The adjustable valve (5) is a back pressure valve.

9. A method for controlling a bubble generating system according to any one of claims 4 to 8, characterized in that The steps include: Step 1: Set the outlet water temperature T of the heating module; Step 2: Set the heating power of the heating module to a preset value, and calculate the water outlet flow rate F of the heating module according to the pre-stored relationship between the water outlet temperature and the water outlet flow rate of the heating module; Step 3: Calculate the opening of the adjustable valve; Step 4: Calculate the voltage of the booster pump and start the booster pump with the voltage; Step 5: Detect the outlet water temperature t2 in real time through the first temperature sensor and determine whether the outlet water temperature t2 is equal to T. If so, proceed to step 6; if not, adjust the voltage of the booster pump through the PID algorithm and continue to detect the outlet water temperature t2 through the first temperature sensor; Step 6: In real time, the result y1 detected by the first bubble detection module and the result y2 detected by the second bubble detection module are collected, and it is determined whether y2 is greater than or equal to a*y1, where a is the set bubble-free retention coefficient, 0<a≤1. If so, the process proceeds to step 7; if not, the opening of the adjustable valve is adjusted using the PID algorithm, and the process proceeds to step 5. Step 7: Save the current booster pump voltage and adjustable valve opening and use them as reference data for the next time.

10. The control method according to claim 9, characterized in that: The calculation method of the opening of the adjustable valve in step 3 and the booster pump voltage in step 4 is: Different adjustable valve openings are set in sections, the voltage of the booster pump is adjusted, and the flow rate of the booster pump under different voltages is obtained; and the voltage of the booster pump and the adjustable valve opening are obtained according to the water outlet flow F.

11. A method for controlling a bubble generating system according to any one of claims 4 to 8, characterized in that The steps include: Step a, setting the water outlet temperature T of the heating module; Step b, calculating the opening of the adjustable valve; Step c, calculating the voltage of the booster pump and starting the booster pump with the voltage; Step d, adjusting the heating power of the heating module by using a PID algorithm; Step e: Detect the outlet water temperature t2 in real time through the first temperature sensor, and determine whether the outlet water temperature t2 is equal to T. If so, proceed to step f; if not, proceed to step d; Step f, adjusting the opening of the adjustable valve by using a PID algorithm; Step g, collecting the result y1 detected by the first bubble detection module and the result y2 detected by the second bubble detection module in real time, and determining whether y2 is greater than or equal to a*y1, where a is the set bubble-free retention coefficient, 0<a≤1; if yes, proceed to step h; if not, proceed to step f; Step h: determine whether the heating power of the heating module has reached the maximum value Pmax. If so, proceed to step i; if not, adjust the voltage of the booster pump using the PID algorithm and proceed to step e; Step i: Save the current voltage of the booster pump, the opening of the adjustable valve and the heating power of the heating module and use them as reference data for the next time.

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