Steam water washing control method of a range hood and range hood

Abstract

The application relates to a steam water washing control method and a range hood, and relates to the technical field of intelligent household appliances. The method comprises the following steps: when a current control period starts, according to the working parameters and historical heating time of a heater in a previous control period, the water inlet parameters, historical water pumping time of a water pump and a preset target water outlet temperature, the heating energy generated by the heater is determined, and the heat absorption energy required by the heater for heating the water inlet to the target water outlet temperature; the heating energy and the heat absorption energy are compared, and the target heating time of the heater and the target water pumping time of the water pump in the current control period are determined; in the current control period, the heater is controlled to heat according to the target heating time, and the water pump is controlled to pump water according to the target water pumping time. The application can stabilize the water outlet temperature.

Description

Technical Field

[0001] This application relates to the field of smart home appliance technology, and in particular to a steam washing control method for a range hood and the range hood itself. Background Technology

[0002] Currently, the steam cleaning function of conventional range hoods is achieved through a heating cleaning component within the hood. This component includes a PTC (Positive Temperature Coefficient) heater and a water pump. The PTC heater consists of a PTC ceramic heating element and an aluminum body. During the steam cleaning process, the water pump draws water into the aluminum body. The PTC ceramic heating element heats up rapidly after being energized, and the resulting heat is conducted to the aluminum body and absorbed by the water flow within it, thus generating the steam or high-temperature water flow required for cleaning the interior of the range hood.

[0003] In existing technologies, the operating state of a PTC heater is generally controlled by detecting the temperature of the aluminum body. For example, when the aluminum body temperature reaches the highest temperature threshold (e.g., 135°C), the PTC heater stops heating; when the aluminum body temperature reaches the lowest temperature threshold (e.g., 110°C), the PTC heater starts heating. However, since the heating power of the PTC heater is greatly affected by temperature, the existing control method will lead to unstable heating power of the PTC, resulting in large fluctuations in water flow temperature and poor cleaning effect of the steam washing function. Summary of the Invention

[0004] Therefore, it is necessary to provide a steam washing control method for a range hood and a range hood in response to the above-mentioned technical problems.

[0005] In a first aspect, a method for controlling the steam washing of a range hood is provided, the method comprising:

[0006] At the start of the current control cycle, the heating energy generated by the heater in the previous control cycle is determined based on the heater's operating parameters and historical heating duration in the previous control cycle.

[0007] Based on the water pump inlet parameters, historical pumping duration, and preset target outlet water temperature in the previous control cycle, determine the heat absorption energy required for the heater to heat the inlet water to the target outlet water temperature in the previous control cycle.

[0008] If the heating energy is greater than the heat absorption energy, then based on the heat absorption energy and the operating parameters, the target heating duration of the heater in the current control cycle is determined, and the historical pumping duration is determined as the target pumping duration of the water pump in the current control cycle.

[0009] If the heating energy is less than the heat absorption energy, a target pumping time length of the water pump in the current control period is determined according to the heating energy, the water inlet parameter and the target water outlet temperature, and the historical heating time length is determined as a target heating time length of the heater in the current control period;

[0010] In the current control period, the heater is controlled to heat for the target heating time length, and the water pump is controlled to pump for the target pumping time length, so that the water outlet temperature of the heater in the current control period is the target water outlet temperature.

[0011] As an optional implementation, the working parameter includes a working voltage and a working current, and a formula for determining the heating energy generated by the heater in the last control period according to the working parameter and the historical heating time length of the heater in the last control period is:

[0012]

[0013] Wherein, W represents the heating energy, U represents the working voltage, I represents the working current, and t1 represents the historical heating time length.

[0014] As an optional implementation, the water inlet parameter includes a water inlet temperature and a water inlet flow rate, and a formula for determining the heat absorption energy required by the heater to heat the water inlet to the target water outlet temperature in the last control period according to the water inlet parameter, the historical pumping time length and the preset target water outlet temperature of the water pump in the last control period is:

[0015] Qwater=C*L*t2*(T2-T1)

[0016] Wherein, Qwater represents the heat absorption energy, C represents the specific heat capacity, L represents the water inlet flow rate, t2 represents the historical pumping time length, T2 represents the target water outlet temperature, and T1 represents the water inlet temperature.

[0017] As an optional implementation, the working parameter includes a working voltage and a working current, and a formula for determining the target heating time length of the heater in the current control period according to the heat absorption energy and the working parameter is:

[0018] t3=Qwater / (U*I)

[0019] Wherein, t3 represents the target heating time length, Qwater represents the heat absorption energy, U represents the working voltage, and I represents the working current.

[0020] As an optional implementation, the water inlet parameter includes water inlet temperature and water inlet flow rate, and the formula for determining the target water pumping time length of the water pump in the current control period according to the heating energy, the water inlet parameter and the target water outlet temperature is:

[0021] t4 = W / (C*L*(T2-T1))

[0022] wherein t4 represents the target water pumping time length, W represents the heating energy, C represents the specific heat capacity, L represents the water inlet flow rate, T2 represents the target water outlet temperature, and T1 represents the water inlet temperature.

[0023] As an optional implementation, the method further includes:

[0024] If the heating energy is equal to the heat absorption energy, the historical heating time length is determined as the target heating time length of the heater in the current control period, and the historical water pumping time length is determined as the target water pumping time length of the water pump in the current control period.

[0025] In a second aspect, a range hood is provided, which includes:

[0026] a master control device configured to determine, at the beginning of a current control period, a heating energy generated by a heater in a previous control period according to a working parameter of the heater in the previous control period and a historical heating time length;

[0027] the master control device is further configured to determine, according to a water inlet parameter of a water pump in the previous control period, the historical water pumping time length and a preset target water outlet temperature, a heat absorption energy required by the heater to heat water inlet to the target water outlet temperature in the previous control period;

[0028] the master control device is further configured to, if the heating energy is greater than the heat absorption energy, determine a target heating time length of the heater in the current control period according to the heat absorption energy and the working parameter, and determine the historical water pumping time length as a target water pumping time length of the water pump in the current control period;

[0029] the master control device is further configured to, if the heating energy is less than the heat absorption energy, determine a target water pumping time length of the water pump in the current control period according to the heating energy, the water inlet parameter and the target water outlet temperature, and determine the historical heating time length as a target heating time length of the heater in the current control period;

[0030] the master control device is further configured to control the heater to heat for the target heating time length and control the water pump to pump water for the target water pumping time length in the current control period, so that the water outlet temperature of the heater is the target water outlet temperature in the current control period.

[0031] As an optional implementation, the working parameter includes a working voltage and a working current.

[0032] As an optional implementation, the water inlet parameter includes a water inlet temperature and a water inlet flow.

[0033] As an optional implementation, the master device is further configured to, if the heating energy is equal to the heat absorption energy, determine the historical heating duration as a target heating duration of the heater in the current control period and determine the historical pumping duration as a target pumping duration of the water pump in the current control period.

[0034] In a third aspect, a computer device is provided, including a memory and a processor, the memory having stored thereon a computer program capable of running on the processor, and the processor implements the method steps of the first aspect when executing the computer program.

[0035] In a fourth aspect, a computer readable storage medium is provided, having stored thereon a computer program, and the computer program, when executed by a processor, implements the method steps of the first aspect.

[0036] The application provides a steam water washing control method of a range hood and the range hood. The technical scheme provided by the embodiments of the application at least brings the following beneficial effects: at the beginning of a current control period, the range hood determines a heating energy generated by a heater in a previous control period according to working parameters of the heater in the previous control period and a historical heating duration of the heater; the range hood determines a heat absorption energy required for heating water inlet to a target outlet water temperature by the heater in the previous control period according to water inlet parameters of a water pump in the previous control period, a historical pumping duration of the water pump and the target outlet water temperature. Then, if the heating energy is greater than the heat absorption energy, the range hood determines a target heating duration of the heater in the current control period according to the heat absorption energy and the working parameters, and determines the historical pumping duration as a target pumping duration of the water pump in the current control period. If the heating energy is less than the heat absorption energy, the computer device determines a target pumping duration of the water pump in the current control period according to the heating energy, the water inlet parameters and the target outlet water temperature, and determines the historical heating duration as a target heating duration of the heater in the current control period. Finally, in the current control period, the range hood controls the heater to heat according to the target heating duration and controls the water pump to pump water according to the target pumping duration. Through the above method, the heating energy generated by the heater in the current control period can be equal to the heat absorption energy required for heating the water inlet to the target outlet water temperature, so as to stabilize the outlet water temperature at the target outlet water temperature and ensure the cleaning effect of the steam water washing function of the range hood.

[0037] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the application. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of a heating cleaning assembly provided in an embodiment of this application;

[0040] Figure 2 A flowchart of a steam washing control method for a range hood provided in this application embodiment;

[0041] Figure 3 A flowchart illustrating an example of a steam washing control method for a range hood provided in this application embodiment;

[0042] Figure 4 This is a schematic diagram of the structure of a range hood provided in an embodiment of this application;

[0043] Figure 5 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0045] The steam cleaning control method for range hoods provided in this application embodiment can be applied to range hoods with heating cleaning components. Figure 1 This is a schematic diagram of the structure of a heated cleaning assembly provided in an embodiment of this application, as shown below. Figure 1As shown, the heating cleaning assembly includes a PTC heater 110, a water pump 120, a water inlet 130, a water inlet temperature sensor 140 and a shell 150. Among them, the PTC heater 110, the water pump 120, the water inlet 130 and the water inlet temperature sensor 140 are arranged in the shell 150. After the steam water washing function of the range hood is started, the water pump 120 pumps water from a water cup (not shown in the figure), and the pumped water flow enters the PTC heater 110 from the water inlet 130 to absorb heat, and the generated water flow (or water vapor) is used to clean the impeller and the shell of the range hood; the water inlet temperature sensor 140 is used to detect the temperature of the aluminum body in the PTC heater when there is no water flow from the water inlet 130, and is used to detect the water inlet temperature when there is water flow from the water inlet 130. It should be noted that although the fluid pumped by the water pump in the embodiment of the present application is water, in actual application scenarios, the fluid pumped by the water pump can also be a liquid such as a cleaning liquid special for the range hood.

[0046] Next, a steam water washing control method of a range hood provided by the embodiment of the present application will be described in detail in combination with the specific implementation manner, Figure 2 The flow chart of the steam water washing control method of the range hood provided by the embodiment of the present application is shown in Figure 2 As shown, the specific steps are as follows:

[0047] Step 201, at the beginning of the current control period, the heating energy generated by the heater in the last control period is determined according to the working parameters of the heater in the last control period and the historical heating time length.

[0048] In implementation, after the user starts the steam water washing function of the range hood, the range hood first controls the PTC heater to be powered and preheated. When it is detected that the temperature of the aluminum body in the PTC heater reaches a preset target preheating temperature (such as 110°C), the first control period is entered, the range hood controls the PTC heater to heat according to a preset initial heating time length, controls the water pump to pump water according to a preset initial water pumping time length, and detects the working parameters of the PTC heater and the water inlet parameters of the water pump. After the PTC heater completes the work in the first control period, at the beginning of each current control period, the range hood determines the heating energy generated by the heater in the last control period according to the working parameters of the PTC heater and the historical heating time length. Among them, the working parameters of the PTC heater can include the working voltage and the working current of the PTC heater, and the historical heating time length is the actual heating time length of the PTC heater in the last control period. For example, the time length of the control period is 10 seconds, and the historical heating time length is 9 seconds, which means that in the last control period, the PTC heater heats for 9 seconds and stops heating for 1 second.

[0049] It should be noted that, in the embodiments provided in the present application, the length of the control period is a preset fixed value, which can be obtained by engineers through experiments according to the specific model of the range hood and pre-stored in the main control device of the range hood. In addition, the initial heating time, the initial water pumping time and the historical heating time are all greater than 0 and less than or equal to the length of the control period. Preferably, the length of the control period is the length of time required for the water flow to flow from the water inlet of the PTC heater to the water outlet, and the initial heating time and the initial water pumping time are both equal to the length of the control period.

[0050] As an optional implementation, the working parameters of the PTC heater include working voltage and working current, and the range hood determines the heating energy generated by the heater in the last control period according to the working parameters of the heater in the last control period and the historical heating time, and the processing process is: determining the heating energy generated by the heater in the last control period according to the working voltage, the working current and the historical heating time of the heater in the last control period.

[0051] In implementation, the range hood can determine the heating energy generated by the PTC heater in the last control period according to the working voltage, the working current and the historical heating time of the PTC heater in the last control period. The working voltage of the PTC heater is equal to the rated driving voltage, which is generally a fixed value during the heating process. Since the PTC ceramic heating element in the PTC heater is a positive temperature coefficient thermistor, the current is large after power-on, the heating is rapid, and when the temperature Curie point (such as 100℃) is reached, the resistance value increases with the temperature in a step manner, and the current decreases sharply. Therefore, the PTC heater has the characteristic of unstable current change. Therefore, in the embodiment of the present application, a current sampling circuit is arranged in the driving circuit of the PTC heater for detecting the working current of the PTC heater.

[0052] Further, in the embodiment of the present application, considering the unstable characteristic of the working current of the PTC heater, the integral algorithm is used to determine the heating energy generated by the PTC heater in the last control period, which can accurately calculate the heat energy generated by the PTC heater in the last control period. The formula for determining the heating energy generated by the PTC heater in the last control period is:

[0053]

[0054] Wherein, W represents the heating energy, U represents the working voltage, I represents the working current, and t1 represents the historical heating time. Preferably, the working current I is the instantaneous current of the PTC heater collected according to the preset sampling period (such as 1ms) of sampling.

[0055] At step 202, the heat absorption energy required by the heater to heat the water to the target outlet water temperature in the last control period is determined according to the water inlet parameter of the water pump in the last control period, the historical water pumping duration and the preset target outlet water temperature.

[0056] In implementation, after the water pump completes the work in the first control period, at the beginning of each current control period, the range hood determines the heat absorption energy required by the PTC heater to heat the water to the target outlet water temperature in the last control period according to the water inlet parameter of the water pump in the last control period, the historical water pumping duration and the preset target outlet water temperature. The target outlet water temperature is obtained by engineers through experiments according to the specific model of the range hood and is pre-stored in the main control device of the range hood. Generally, the steam water washing function of the range hood can make the target outlet water temperature reach the boiling temperature to generate steam. The historical water pumping duration is the actual water pumping duration of the water pump in the last control period. For example, the duration of the control period is 10 seconds, and the historical water pumping duration is 7 seconds, which means that the water pump pumps water for 7 seconds and stops pumping water for 3 seconds in the last control period. The water inlet parameter of the water pump can include the water inlet temperature and the water inlet flow.

[0057] As an optional implementation, the water inlet parameter of the water pump includes the water inlet temperature and the water inlet flow. The processing procedure of the range hood to determine the heat absorption energy required by the heater to heat the water to the target outlet water temperature in the last control period according to the water inlet parameter of the water pump in the last control period, the historical water pumping duration and the preset target outlet water temperature is: determining the heat absorption energy required by the heater to heat the water to the target outlet water temperature in the last control period according to the water inlet temperature, the water inlet flow, the historical water pumping duration and the preset target outlet water temperature in the last control period.

[0058] In implementation, the range hood can determine the heat absorption energy required by the heater to heat the water pumped by the water pump to the target outlet water temperature in the last control period according to the water inlet temperature, the water inlet flow, the historical water pumping duration and the preset target outlet water temperature in the last control period. The water inlet temperature can be detected by a water inlet temperature sensor. It should be noted that during the process of the water pump pumping water from the water cup, if the water in the water cup is sufficient, the water inlet flow of the water pump is generally equal to the flow parameter calibrated when the water pump is factory-calibrated. If the water in the water cup is pumped dry, the range hood detects that the water inlet flow of the water pump is lower than the preset water inlet flow threshold, and then controls the PTC heater and the water pump to stop working and outputs a prompt information that the range hood cleaning is completed.

[0059] Further, the formula for the range hood to determine the heat absorption energy required by the heater to heat the water pumped by the water pump to the target outlet water temperature in the last control period is:

[0060] Qwater=C*L*t2*(T2-T1)

[0061] Wherein, Qwater represents the heat absorption energy, C represents the specific heat capacity, L represents the water inflow, t2 represents the historical water pumping time, T2 represents the target water outlet temperature, and T1 represents the water inflow temperature.

[0062] Since the heating energy generated by the PTC heater and the heat absorption energy required for heating the water inflow in the aluminum body to the target water outlet temperature are both likely to be affected by the ambient temperature, in the first control cycle, the PTC heater generates heating energy that is often unable to equal the heat absorption energy required for heating the water inflow in the aluminum body to the target water outlet temperature, resulting in unstable water outlet temperature of the PTC heater. Therefore, in the embodiments of the present application, steps 201 and 202 are used to determine the heating energy generated by the PTC heater and the heat absorption energy required for heating the water inflow pumped by the water pump to the target water outlet temperature, respectively, at the beginning of each current control cycle. In subsequent steps, by comparing the heating energy and the heat absorption energy, the control process of the PTC heater and the water pump in the current control cycle is determined, so that the water outlet temperature of the PTC heater in the current control cycle is the target water outlet temperature.

[0063] Step 203: If the heating energy is greater than the heat absorption energy, the target heating time of the heater in the current control cycle is determined according to the heat absorption energy and the working parameters, and the historical water pumping time is determined as the target water pumping time of the water pump in the current control cycle.

[0064] In implementation, in the case of high ambient temperature (for example, room temperature of 35℃ in summer), the heating energy generated by the PTC heater is usually greater than the heat absorption energy required for heating the water inflow in the aluminum body to the target water outlet temperature in the first control cycle. In this case, in order to make the water outlet temperature of the PTC heater equal to the target water outlet temperature, the range hood determines the target heating time of the heater in the current control cycle that matches the heat absorption energy (i.e., correspondingly reduces the heating time of the PTC heater to reduce the heating energy generated by the PTC heater) according to the heat absorption energy and the working parameters, and determines the historical water pumping time as the target water pumping time of the water pump in the current control cycle.

[0065] As an optional implementation, the working parameters of the PTC heater include working voltage and working current, and the process of determining the target heating time of the heater in the current control cycle according to the heat absorption energy and the working parameters is that the range hood determines the target heating time of the heater in the current control cycle according to the heat absorption energy, the working voltage, and the working current.

[0066] In implementation, the formula for determining the target heating time of the PTC heater in the current control cycle according to the heat absorption energy required for heating the water inflow in the aluminum body to the target water outlet temperature in the last control cycle, the working voltage, and the working current of the PTC heater is:

[0067] t3 = Qwater / (U * I)

[0068] Wherein, t3 represents the target heating time length, Qwater represents the heat absorption energy, U represents the working voltage, and I represents the working current. It should be noted that the working current of the PTC heater collected by the range hood is the instantaneous current. In the process of determining the target heating time length of the PTC heater in the current control period, the average value of the working current of the PTC heater in the last control period can be used to determine the target heating time length, or the target heating time length can be determined by solving the integral according to the set of working currents.

[0069] Step 204, if the heating energy is less than the heat absorption energy, the target pumping time length of the water pump in the current control period is determined according to the heating energy, the water inlet parameter and the target outlet water temperature, and the historical heating time length is determined as the target heating time length of the heater in the current control period.

[0070] In implementation, in the case of low ambient temperature (for example, the room temperature is 0℃ in winter), the heating energy generated by the PTC heater in the first control period is usually less than the heat absorption energy required for heating the water inlet in the aluminum body to the target outlet water temperature. In this case, in order to make the outlet water temperature of the PTC heater equal to the target outlet water temperature, the range hood determines the target pumping time length of the water pump in the current control period according to the heating energy, the water inlet parameter and the target outlet water temperature (i.e. the corresponding pumping time length of the water pump is reduced to reduce the heat absorption energy required for heating the water inlet in the aluminum body to the target outlet water temperature), and the historical heating time length is determined as the target heating time length of the heater in the current control period.

[0071] As an optional implementation, the water inlet parameter of the water pump includes the water inlet temperature and the water inlet flow rate, and the process of determining the target pumping time length of the water pump in the current control period according to the heating energy, the water inlet parameter and the target outlet water temperature is: determining the target pumping time length of the water pump in the current control period according to the heating energy, the water inlet temperature, the water inlet flow rate and the target outlet water temperature.

[0072] In implementation, the formula for determining the target pumping time length of the water pump in the current control period according to the heating energy generated by the PTC heater, the water inlet temperature of the water pump, the water inlet flow rate and the target outlet water temperature is:

[0073] t4 = W / (C * L * (T2 - T1))

[0074] Wherein, t4 represents the target pumping time length, W represents the heating energy, C represents the specific heat capacity, L represents the water inlet flow rate, T2 represents the target outlet water temperature, and T1 represents the water inlet temperature.

[0075] As an optional implementation, the process of the range hood further includes:

[0076] If the heating energy is equal to the heat absorption energy, the historical heating duration is determined as the target heating duration of the heater in the current control period, and the historical pumping duration is determined as the target pumping duration of the water pump in the current control period.

[0077] In implementation, if the heating energy generated by the PTC heater is equal to the heat absorption energy required for heating the water in the aluminum body to the target outlet water temperature, it indicates that the heat energy generated by the PTC heater is just converted into the energy required for the temperature of the water to rise to the target outlet water temperature. In this case, the outlet water temperature of the PTC heater is equal to the target outlet water temperature, and the temperature overshoot or the temperature failing to reach the target outlet water temperature does not occur, and the heating power of the PTC heater can also be kept in the fluctuation range required by the factory standard, and the phenomenon of the whole machine power being large or small does not occur. Therefore, the range hood determines the historical heating duration as the target heating duration of the PTC heater in the current control period, and determines the historical pumping duration as the target pumping duration of the water pump in the current control period.

[0078] In step 205, in the current control period, the heater is controlled to heat according to the target heating duration, and the water pump is controlled to pump according to the target pumping duration, so that in the current control period, the outlet water temperature of the heater is the target outlet water temperature.

[0079] In implementation, in the current control period, the heater is controlled to heat according to the target heating duration, and the water pump is controlled to pump according to the target pumping duration, so that in the current control period, the heat energy generated by the PTC heater is just converted into the energy required for the temperature of the water to rise to the target outlet water temperature, that is, the outlet water temperature of the PTC heater is stabilized at the target outlet water temperature, and the temperature overshoot or the temperature failing to reach the target outlet water temperature does not occur, and the cleaning effect of the steam water washing function of the range hood is ensured. At the same time, the heating power of the PTC heater is kept in the fluctuation range required by the factory standard, and the phenomenon of the whole machine power being large or small does not occur.

[0080] For the convenience of understanding, Figure 3 An example of a flow chart of a steam water washing control method of a range hood provided by the embodiment of the application is shown in Figure 3 As shown in the figure, the specific steps are as follows:

[0081] In step 301, the parameter variables are initialized after power-on.

[0082] In step 302, the steam water washing function is started, and the working current of the heater, the inlet water flow of the water pump, and the inlet water temperature are detected.

[0083] In step 303, at the beginning of the current control period, the heating energy generated by the heater in the last control period is determined, and the heat absorption energy required for heating the water to the target outlet water temperature is determined.

[0084] comparing the heating energy and the heat absorption energy, if the heating energy is greater than the heat absorption energy, step 304 is performed, if the heating energy is less than the heat absorption energy, step 305 is performed, and if the heating energy is equal to the heat absorption energy, step 306 is performed;

[0085] In step 304, according to the heat absorption energy and the working parameter, the target heating time length of the heater in the current control period is determined, and the historical pumping time length is determined as the target pumping time length of the water pump in the current control period;

[0086] In step 305, according to the heating energy, the water inlet parameter and the target outlet water temperature, the target pumping time length of the water pump in the current control period is determined, and the historical heating time length is determined as the target heating time length of the heater in the current control period;

[0087] In step 306, the historical heating time length is determined as the target heating time length of the heater in the current control period, and the historical pumping time length is determined as the target pumping time length of the water pump in the current control period;

[0088] In step 307, in the current control period, the heater is controlled to heat according to the target heating time length, and the water pump is controlled to pump water according to the target pumping time length.

[0089] The method provided by the embodiment of the present application is a steam water washing control method of a range hood. At the beginning of a current control period, the range hood determines a heating energy generated by a heater in a previous control period according to a working parameter of the heater in the previous control period and a historical heating time length. The range hood determines a heat absorption energy required for heating water inlet to a target outlet water temperature by the heater in the previous control period according to a water inlet parameter of a water pump in the previous control period, the historical pumping time length and the preset target outlet water temperature. Then, if the heating energy is greater than the heat absorption energy, the range hood determines a target heating time length of the heater in the current control period according to the heat absorption energy and the working parameter, and determines the historical pumping time length as a target pumping time length of the water pump in the current control period. If the heating energy is less than the heat absorption energy, the computer device determines the target pumping time length of the water pump in the current control period according to the heating energy, the water inlet parameter and the target outlet water temperature, and determines the historical heating time length as the target heating time length of the heater in the current control period. Finally, in the current control period, the range hood controls the heater to heat according to the target heating time length, and controls the water pump to pump water according to the target pumping time length. Through the above method, the heating energy generated by the heater in the current control period can be equal to the heat absorption energy required for heating the water inlet to the target outlet water temperature, so that the outlet water temperature is stabilized at the target outlet water temperature, and the cleaning effect of the steam water washing function of the range hood is ensured.

[0090] It should be understood that, although Figures 2 to 3The steps in the flowcharts are shown in sequence according to the arrows, but the steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, the steps are not strictly limited in sequence, and the steps can be executed in other sequences. Moreover, Figures 2 to 3 At least part of the steps in the flowcharts can include multiple steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of the steps or stages is not necessarily sequential, but can be alternately executed with other steps or steps or stages in other steps.

[0091] It can be understood that the same / similar parts between the above-mentioned methods in the specification can be mutually referred to, and each embodiment focuses on the differences from other embodiments, and the related parts can be referred to the description of other method embodiments.

[0092] The application embodiment further provides a range hood, as shown in the figure, the range hood includes a master control device 410, a heater 420 and a water pump 430: Figure 4

[0093] The master control device 410 is used to determine the heating energy generated by the heater 420 in the last control period according to the working parameters of the heater 420 and the historical heating time in the last control period when the current control period starts.

[0094] The master control device 410 is further used to determine the heat absorption energy required for the heater 420 to heat the water to the target outlet water temperature in the last control period according to the water inlet parameters of the water pump 430, the historical water pumping time and the preset target outlet water temperature in the last control period.

[0095] The master control device 410 is further used to determine the target heating time of the heater 420 in the current control period according to the heat absorption energy and the working parameters if the heating energy is greater than the heat absorption energy, and the historical water pumping time is determined as the target water pumping time of the water pump 430 in the current control period.

[0096] The master control device 410 is further used to determine the target water pumping time of the water pump 430 in the current control period according to the heating energy, the water inlet parameters and the target outlet water temperature if the heating energy is less than the heat absorption energy, and the historical heating time is determined as the target heating time of the heater 420 in the current control period.

[0097] The master control device 410 is further used to control the heater 420 to heat according to the target heating time and control the water pump 430 to pump water according to the target water pumping time in the current control period, so that the outlet water temperature of the heater 420 is the target outlet water temperature in the current control period. ​

[0098] As an optional implementation, the working parameter comprises a working voltage and a working current.

[0099] As an optional implementation, the water inlet parameter comprises a water inlet temperature and a water inlet flow rate.

[0100] As an optional implementation, the master device is further configured to determine the historical heating duration as a target heating duration of the heater in the current control period and determine the historical pumping duration as a target pumping duration of the water pump in the current control period if the heating energy is equal to the heat absorption energy.

[0101] The embodiment of the present application provides a range hood. At the beginning of a current control period, the range hood determines a heating energy generated by a heater in a previous control period according to a working parameter of the heater in the previous control period and a historical heating duration; determines a heat absorption energy required by the heater to heat water inlet to a target water outlet temperature in the previous control period according to a water inlet parameter of a water pump in the previous control period, the historical pumping duration and the preset target water outlet temperature. Then, if the heating energy is greater than the heat absorption energy, the range hood determines a target heating duration of the heater in the current control period according to the heat absorption energy and the working parameter, and determines the historical pumping duration as a target pumping duration of the water pump in the current control period. If the heating energy is less than the heat absorption energy, the computer device determines a target pumping duration of the water pump in the current control period according to the heating energy, the water inlet parameter and the target water outlet temperature, and determines the historical heating duration as a target heating duration of the heater in the current control period. Finally, in the current control period, the range hood controls the heater to heat according to the target heating duration and controls the water pump to pump water according to the target pumping duration. By using the range hood provided in the embodiment of the present application, the heating energy generated by the heater in the current control period can be equal to the heat absorption energy required by the water inlet to heat to the target water outlet temperature, so that the water outlet temperature is stabilized at the target water outlet temperature, and the cleaning effect of the steam water washing function of the range hood is ensured.

[0102] The specific limitation of the range hood can be referred to the limitation of the steam water washing control method of the range hood in the above, which will not be described here. Each module in the range hood can be realized by software, hardware and combination thereof in whole or in part. Each module can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operation corresponding to each module.

[0103] In one embodiment, a computer device is provided, as shown in Figure 5 including a memory and a processor, wherein the memory stores a computer program capable of running on the processor, and the processor implements the method steps of the steam water washing control method of the range hood when executing the computer program.

[0104] In one embodiment, a computer readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for steam washing control of the extractor.

[0105] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, the processes of the above-mentioned embodiments can be included. Any reference to memory, storage, database or other medium used in the embodiments provided in the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0106] It should be noted that, in this document, the terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0107] It should also be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for display, analyzed data, etc.) involved in the present application are information and data authorized by the user or authorized by all parties.

[0108] The various embodiments in the specification are described in a related manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, the system embodiments are described simply because they are basically similar to the method embodiments, and the related parts can be referred to the part of the method embodiments.

[0109] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the specification.

[0110] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A steam water washing control method of a hood, characterized by, The method comprises: at the beginning of a current control period, determining heating energy generated by a heater in a previous control period according to working parameters of the heater in the previous control period and historical heating duration; determining heat absorption energy required for the heater to heat water to a preset target outlet water temperature in the previous control period according to inlet water parameters of a water pump in the previous control period, historical pumping duration and the target outlet water temperature; if the heating energy is greater than the heat absorption energy, determining target heating duration of the heater in the current control period according to the heat absorption energy and the working parameters, and determining the historical pumping duration as target pumping duration of the water pump in the current control period; if the heating energy is less than the heat absorption energy, determining target pumping duration of the water pump in the current control period according to the heating energy, the inlet water parameters and the target outlet water temperature, and determining the historical heating duration as target heating duration of the heater in the current control period; in the current control period, controlling the heater to heat according to the target heating duration and controlling the water pump to pump water according to the target pumping duration, so that outlet water temperature of the heater is the target outlet water temperature in the current control period.

2. The method of claim 1, wherein, The working parameters comprise working voltage and working current, and the formula for determining the heating energy generated by the heater in the previous control period according to the working parameters of the heater in the previous control period and the historical heating duration is: wherein W represents the heating energy, U represents the working voltage, I represents the working current, and t1 represents the historical heating duration.

3. The method of claim 1, wherein, The inlet water parameters comprise inlet water temperature and inlet water flow rate, and the formula for determining the heat absorption energy required for the heater to heat water to the target outlet water temperature in the previous control period according to the inlet water parameters of the water pump in the previous control period, the historical pumping duration and the target outlet water temperature is: Qwater=C*L*t2*(T2-T1) wherein Qwater represents the heat absorption energy, C represents specific heat capacity, L represents the inlet water flow rate, t2 represents the historical pumping duration, T2 represents the target outlet water temperature, and T1 represents the inlet water temperature.

4. The method of claim 1, wherein, The working parameters comprise working voltage and working current, and the formula for determining the target heating duration of the heater in the current control period according to the heat absorption energy and the working parameters is: t3=Qwater / (U*I) wherein t3 represents the target heating duration, Qwater represents the heat absorption energy, U represents the working voltage, and I represents the working current.

5. The method of claim 1, wherein, The inlet water parameters comprise inlet water temperature and inlet water flow rate, and the formula for determining the target pumping duration of the water pump in the current control period according to the heating energy, the inlet water parameters and the target outlet water temperature is: t4=W / (C*L*(T2-T1)) wherein t4 represents the target pumping duration, W represents the heating energy, C represents specific heat capacity, L represents the inlet water flow rate, T2 represents the target outlet water temperature, and T1 represents the inlet water temperature.

6. The method of claim 1, wherein, The method further comprises: If the heating energy is equal to the heat absorption energy, the historical heating duration is determined as a target heating duration of the heater in the current control period, and the historical pumping duration is determined as a target pumping duration of the water pump in the current control period.

7. A range hood, characterized by The range hood comprises: The main control device is configured to, at the beginning of a current control period, determine heating energy generated by a heater in a previous control period according to a working parameter of the heater in the previous control period and a historical heating duration; The main control device is further configured to determine heat absorption energy required by the heater to heat water in the previous control period to a target outlet water temperature according to an inlet water parameter of a water pump in the previous control period, the historical pumping duration, and the target outlet water temperature; The main control device is further configured to, if the heating energy is greater than the heat absorption energy, determine a target heating duration of the heater in the current control period according to the heat absorption energy and the working parameter, and determine the historical pumping duration as a target pumping duration of the water pump in the current control period; The main control device is further configured to, if the heating energy is less than the heat absorption energy, determine a target pumping duration of the water pump in the current control period according to the heating energy, the inlet water parameter, and the target outlet water temperature, and determine the historical heating duration as a target heating duration of the heater in the current control period; The main control device is further configured to, in the current control period, control the heater to heat for the target heating duration, and control the water pump to pump for the target pumping duration, so that an outlet water temperature of the heater in the current control period is the target outlet water temperature.

8. The range hood according to claim 7, wherein The working parameter comprises a working voltage and a working current.

9. The range hood according to claim 7, wherein The inlet water parameter comprises an inlet water temperature and an inlet water flow.

10. The range hood according to claim 7, wherein The main control device is further configured to, if the heating energy is equal to the heat absorption energy, determine the historical heating duration as a target heating duration of the heater in the current control period, and determine the historical pumping duration as a target pumping duration of the water pump in the current control period.

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