Range hood self-cleaning method and range hood

Abstract

The present application relates to the technical field of range hoods, and in particular to a range hood self-cleaning method and a range hood. The method comprises: in the preheating stage, obtaining the water temperature of the water stored in the water cup and the first structural temperature of the structure to be cleaned. According to the water temperature of the stored water and the first structural temperature, determining the target preheating water outlet temperature of the heater, and controlling the heater to perform preheating work according to the target preheating water outlet temperature. In the cleaning stage, obtaining the water temperature of the first nozzle water outlet and the second structural temperature of the structure to be cleaned. According to the water temperature of the first nozzle water outlet and the second structural temperature, determining the target cleaning water outlet temperature of the heater, and controlling the heater to perform cleaning work according to the target cleaning water outlet temperature. The use of the present application can effectively control the problem of energy waste caused by excessively high heater temperature or the problem of incomplete cleaning caused by excessively low heating temperature.

Description

Technical Field

[0001] The present application relates to the technical field of range hoods, and in particular to a range hood self-cleaning method and a range hood. Background Art

[0002] At present, automatic cleaning of range hoods has become a relatively popular technology in the industry. Among them, the method with the best cleaning effect is: the water pump draws water from the water cup of the range hood, the water heated by the heating tube enters the volute of the range hood, and the high-temperature steam is sprayed onto the blades of the range hood motor through the nozzle of the range hood to soften the oil on the blades, and then the nozzle sprays high-temperature hot water onto the blades of the motor to clean the softened oil from the blades.

[0003] However, due to the influence of the ambient temperature and the temperature of the structure to be cleaned, the temperature of the steam or hot water actually sprayed onto the structure to be cleaned is lower than the preset water outlet temperature of the heating pipe, resulting in poor cleaning effect. Therefore, a self-cleaning method for range hoods is urgently needed. Summary of the Invention

[0004] Based on this, it is necessary to provide a range hood self-cleaning method and a range hood to address the above technical problems.

[0005] In a first aspect, a range hood self-cleaning method is provided, the method comprising:

[0006] During the preheating phase, the water temperature in the water cup and the first structural temperature of the structure to be cleaned are obtained;

[0007] determining a target preheating outlet water temperature of the heater according to the stored water temperature and the first structure temperature, and controlling the heater to perform preheating according to the target preheating outlet water temperature;

[0008] During the cleaning phase, the water temperature of the first nozzle and the second structure temperature of the structure to be cleaned are obtained;

[0009] The target cleaning water outlet temperature of the heater is determined according to the water temperature of the first nozzle and the second structure temperature, and the heater is controlled to perform cleaning work according to the target cleaning water outlet temperature.

[0010] As an optional implementation manner, determining the target preheating outlet water temperature of the heater according to the stored water temperature and the first structure temperature includes:

[0011] In the pre-stored correspondence between the stored water temperature, the structure temperature and the preheated water outlet temperature, a target preheated water outlet temperature corresponding to both the stored water temperature and the first structure temperature is searched.

[0012] As an optional implementation manner, determining the target preheating outlet water temperature of the heater according to the stored water temperature and the first structure temperature includes:

[0013] Determining a target water storage temperature compensation coefficient corresponding to the water storage temperature in the water cup in a pre-stored first correspondence between the water storage temperature and the water storage temperature compensation coefficient;

[0014] Determining a first target structural temperature compensation coefficient corresponding to the first structural temperature in a pre-stored first correspondence between structural temperatures and structural temperature compensation coefficients;

[0015] The target preheating outlet water temperature of the heater is determined according to the stored water temperature, the target stored water temperature compensation coefficient, the first structural temperature, and the first target structural temperature compensation coefficient.

[0016] As an optional implementation manner, the formula for determining the target preheating outlet water temperature of the heater based on the stored water temperature, the target stored water temperature compensation coefficient, the first structure temperature, and the first target structure temperature compensation coefficient is:

[0017] T A1 =T G ×K G +T S1 ×K S1 ;

[0018] Among them, T A1 is the target preheating water outlet temperature of the heater, T G is the storage water temperature, K G is the target water temperature compensation coefficient, T S1 is the first structural temperature, K S1 is the temperature compensation coefficient of the first target structure.

[0019] As an optional implementation manner, the method further includes:

[0020] In the pre-stored correspondence between the preheating outlet water temperature and the preheating time, the target preheating time corresponding to the target preheating outlet water temperature is queried, and the heater is controlled to perform preheating work according to the target preheating time and the target preheating outlet water temperature.

[0021] As an optional embodiment, determining the target washing water outlet temperature of the heater according to the water outlet temperature of the first nozzle and the second structure temperature includes:

[0022] If the water temperature of the first nozzle outlet water is lower than a preset nozzle outlet water temperature threshold, the product of a preset cleaning basic temperature and a preset basic temperature compensation coefficient is determined as the target cleaning water outlet temperature;

[0023] If the first nozzle outlet water temperature is greater than or equal to a preset nozzle outlet water temperature threshold, querying a first target nozzle outlet water temperature compensation coefficient corresponding to the first nozzle outlet water temperature in a pre-stored first correspondence between nozzle outlet water temperatures and nozzle outlet water temperature compensation coefficients, and querying a second target structural temperature compensation coefficient corresponding to the second structural temperature in a pre-stored second correspondence between structural temperatures and structural temperature compensation coefficients;

[0024] The target washing water outlet temperature is determined according to the first nozzle water outlet temperature, the first target nozzle water outlet temperature compensation coefficient, the second structure temperature and the second target structure temperature compensation coefficient.

[0025] As an optional implementation manner, the formula for determining the target washing water outlet temperature based on the first nozzle water outlet temperature, the first target nozzle water outlet temperature compensation coefficient, the second structure temperature and the second target structure temperature compensation coefficient is:

[0026] T A2 =T N1 ×K N1 +T S2 ×K S2 ;

[0027] Among them, T A2 is the target outlet water temperature of the heater, T N is the outlet water temperature of the first nozzle, K N is the first target nozzle outlet water temperature compensation coefficient, T S2 is the second structure temperature, K S2 is the temperature compensation coefficient of the second target structure.

[0028] As an optional implementation manner, the method further includes:

[0029] During the preheating process, the water temperature of the second nozzle and the third structure temperature of the structure to be cleaned are obtained;

[0030] In the pre-stored second correspondence between nozzle outlet water temperature and nozzle outlet water temperature compensation coefficient, querying a second target nozzle outlet water temperature compensation coefficient corresponding to the second nozzle outlet water temperature;

[0031] In a pre-stored third correspondence between structural temperatures and structural temperature compensation coefficients, querying a third target structural temperature compensation coefficient corresponding to the third structural temperature;

[0032] A target preheating outlet water correction temperature is determined based on the second nozzle outlet water temperature, the second target nozzle outlet water temperature compensation coefficient, the third structural temperature, and the third target structural temperature compensation coefficient, so that the heater is preheated according to the target preheating outlet water correction temperature.

[0033] As an optional implementation manner, the formula for determining the target preheating outlet water correction temperature based on the second nozzle outlet water temperature, the second target nozzle outlet water temperature compensation coefficient, the third structure temperature and the third target structure temperature compensation coefficient is:

[0034] T A3 =T N2 ×K N2 +T S3 ×K S3 ;

[0035] Among them, T A3 The target preheated water outlet temperature of the heater, T N1 is the water temperature of the second nozzle, K N is the water temperature compensation coefficient of the second target nozzle, T S3 is the third structure temperature, K S3 is the temperature compensation coefficient of the third target structure.

[0036] In a second aspect, a range hood is provided, which includes a controller, a nozzle water outlet temperature sensor, a temperature sensor for a structure to be cleaned, a water temperature sensor in a water cup, a nozzle, a structure to be cleaned, a heater, a water pump and a water cup, wherein the structure to be cleaned includes one or more of a volute and a wind wheel, the nozzle water outlet temperature sensor obtains the nozzle water outlet temperature and sends it to the controller, the structure to be cleaned temperature sensor obtains the structural temperature of the structure to be cleaned and sends it to the controller, the water temperature sensor in the water cup obtains the water temperature in the water cup and sends it to the controller, the water pump draws the stored water in the water cup to the heater, the heater heats the stored water to generate hot water or steam, and the hot water or steam is sprayed to the structure to be cleaned through the nozzle, and the controller controls the heater, the water pump, the nozzle water outlet temperature sensor, the temperature sensor for the structure to be cleaned and the water temperature sensor in the water cup to implement the method described in any one of the first aspects.

[0037] The present application provides a range hood self-cleaning method and a range hood. The technical solution provided by the embodiments of the present application brings at least the following beneficial effects: in the preheating stage, the water temperature of the water cup and the first structural temperature of the structure to be cleaned are obtained; based on the water temperature and the first structural temperature, the target preheating water outlet temperature of the heater is determined, and the heater is controlled to perform preheating according to the target preheating water outlet temperature; in the cleaning stage, the water temperature of the first nozzle water outlet and the second structural temperature of the structure to be cleaned are obtained; based on the first nozzle water outlet temperature and the second structural temperature, the target cleaning water outlet temperature of the heater is determined, and the heater is controlled to perform cleaning according to the target cleaning water outlet temperature. During the automatic cleaning process of the range hood, the hot water or steam heated by the heater is affected by the ambient temperature, resulting in heat loss and a decrease in temperature. The present application determines the target preheating water outlet temperature by obtaining the water temperature of the water cup and the first structural temperature of the structure to be cleaned. By obtaining the water temperature of the first nozzle outlet and the second structure temperature of the structure to be cleaned, the cleaning water outlet temperature is compensated, and then the target cleaning water outlet temperature is determined. This method can ensure that the nozzle water outlet temperature and the temperature of the hot water or steam sprayed onto the structure to be cleaned meet the cleaning requirements, effectively control the water outlet temperature of the heater, and avoid energy waste caused by too high water outlet temperature or incomplete oil cleaning caused by too low water outlet temperature.

[0038] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 A schematic structural diagram of a range hood provided in an embodiment of the present application;

[0041] Figure 2 A flow chart of a range hood self-cleaning method provided in an embodiment of the present application;

[0042] Figure 3 A flow chart of another range hood self-cleaning method provided in an embodiment of the present application;

[0043] Figure 4 A flow chart of another range hood self-cleaning method provided in an embodiment of the present application;

[0044] Figure 5A flow chart of another range hood self-cleaning method provided in an embodiment of the present application;

[0045] Figure 6 A flowchart of another example of a range hood self-cleaning method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0047] The range hood self-cleaning method provided in the embodiment of the present application can be applied to the range hood. Figure 1 As shown, the range hood includes a controller 110, a nozzle water outlet temperature sensor 120, a temperature sensor for the structure to be cleaned 130, a water temperature sensor in the water cup 140, a nozzle (not shown in the figure), a structure to be cleaned (not shown in the figure), a heater 150, a water pump 160 and a water cup (not shown in the figure), and the structure to be cleaned includes one or more of a volute and a wind wheel. The nozzle water outlet temperature sensor 120 is arranged at the nozzle and can collect the nozzle water outlet temperature (including hot water temperature or steam temperature). The temperature sensor for the structure to be cleaned 130 is arranged near the structure to be cleaned (specifically, it can be arranged on the inner wall of the volute near the wind wheel) and is used to collect the ambient temperature between the volute and the wind wheel (the temperature can be approximately expressed as the wind wheel temperature or the volute temperature). The water temperature sensor in the water cup 140 is arranged inside the water cup and is used to collect the stored water temperature. The controller 110 controls the water pump 160 to pump the water in the cup into the heater 150. The controller 110 controls the heater 150 to heat the water to generate hot water or steam, which is then sprayed out from the nozzle through the pipeline and sprayed onto the structure to be cleaned. The following will be combined with specific embodiments to describe in detail a range hood self-cleaning method provided by the present application. Figure 2 A flow chart of a range hood self-cleaning method provided in an embodiment of the present application is shown in FIG. Figure 2 The specific steps are as follows:

[0048] Step 201 : In the preheating stage, the water temperature of the water cup and the first structure temperature of the structure to be cleaned are obtained.

[0049] In practice, the main purpose of the preheating stage is to use hot water to allow water molecules to penetrate the oily surface of the structure to be cleaned (such as blades), achieving the first step of softening the oil. The other purpose is to increase the ambient temperature inside the structure to be cleaned (such as the volute) and maintain it within a certain range, laying the foundation for the next step of steam melting and softening the oil. Because the viscosity of the grease attached to the structure to be cleaned will be greatly reduced and the fluidity will be greatly enhanced at a certain temperature (such as 70°C). Therefore, during the preheating stage, the heater must be controlled to heat the structural temperature of the structure to be cleaned to above 70°C. However, although too high a temperature can better reduce the adhesion rate of grease, the power consumption will also increase, resulting in unnecessary energy waste. Therefore, during the preheating stage, the range hood obtains the water temperature of the water cup and the first structural temperature of the structure to be cleaned. If the water temperature is lower, the preheating water outlet temperature of the heater should be higher and the heating time should be longer. This ensures that after the preheating stage, the first structural temperature of the structure to be cleaned is maintained at around 70°C, providing a guarantee for the subsequent cleaning effect.

[0050] Step 202: determining a target preheating outlet water temperature of the heater according to the stored water temperature and the first structure temperature, and controlling the heater to perform preheating according to the target preheating outlet water temperature.

[0051] During implementation, the controller determines the target preheating outlet water temperature of the heater according to the stored water temperature and the first structure temperature, and controls the heater and the water pump to perform preheating work according to the target preheating outlet water temperature.

[0052] Optionally, in step 202, a method for determining the target preheated water outlet temperature of the heater according to the stored water temperature and the first structure temperature is:

[0053] In the pre-stored correspondence between the stored water temperature, the structure temperature and the preheated water outlet temperature, the target preheated water outlet temperature corresponding to the stored water temperature and the first structure temperature is searched.

[0054] During implementation, the controller queries the target preheating outlet water temperature corresponding to the water storage temperature and the first structural temperature in the pre-stored correspondence between the water storage temperature, the structural temperature and the preheating outlet water temperature. Table 1 is a correspondence between the water storage temperature, the structural temperature and the preheating outlet water temperature provided in an embodiment of the present application, as shown in Table 1. For example: in winter, the water temperature in the water cup is relatively low, at 6°C, and the first structural temperature of the structure to be cleaned is 7°C. According to Table 1, it can be queried that the target preheating outlet water temperature is 90°C. That is, the preheating outlet water temperature is set to 90°C to ensure that the structural temperature of the structure to be cleaned is greater than 70°C after the preheating stage.

[0055] Table 1

[0056]

[0057] As an optional implementation, Figure 3 A flow chart of another range hood self-cleaning method provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the specific steps of another method for determining the target preheating outlet water temperature of the heater according to the stored water temperature and the first structure temperature in step 202 are as follows:

[0058] Step 301 : Determine a target water storage temperature compensation coefficient corresponding to the water storage temperature in the water cup in a pre-stored first correspondence between the water storage temperature and the water storage temperature compensation coefficient.

[0059] In implementation, the controller determines the target water storage temperature compensation coefficient corresponding to the water temperature in the water cup from the pre-stored first correspondence between the water storage temperature and the water storage temperature compensation coefficient. Table 2 shows the first correspondence between the water storage temperature and the water storage temperature compensation coefficient provided in the embodiment of the present application, as shown in Table 2:

[0060] Table 2

[0061]

[0062] Step 302 : determining a first target structural temperature compensation coefficient corresponding to the first structural temperature in a pre-stored first correspondence between structural temperatures and structural temperature compensation coefficients.

[0063] In implementation, the controller determines a first target structural temperature compensation coefficient corresponding to the first structural temperature in a pre-stored first correspondence between structural temperature and structural temperature compensation coefficient. Table 3 is a first correspondence between structural temperature and structural temperature compensation coefficient provided in an embodiment of the present application, as shown in Table 3:

[0064] Table 3

[0065]

[0066]

[0067] Step 303 : determining a target preheating outlet water temperature of the heater according to the stored water temperature, the target stored water temperature compensation coefficient, the first structural temperature, and the first target structural temperature compensation coefficient.

[0068] In practice, the controller determines the heater's target preheated water outlet temperature based on the stored water temperature, the target stored water temperature compensation coefficient, the first structure temperature, and the first target structure temperature compensation coefficient. For example, if the stored water temperature is 10°C and the first structure temperature is 10°C, the controller, based on Tables 2 and 3, determines that the target stored water temperature compensation coefficient is 3.89 and the first target structure temperature compensation coefficient is 4.35.

[0069] Optionally, in step 303, the target preheated water outlet temperature of the heater is determined according to the stored water temperature, the target stored water temperature compensation coefficient, the first structure temperature, and the first target structure temperature compensation coefficient, using the following formula:

[0070] T A1 =T G ×K G +T S1 ×K S1 (Formula 1);

[0071] Among them, T A1 is the target preheating water outlet temperature of the heater, T G is the storage water temperature, K G is the target water temperature compensation coefficient, T S1 is the first structural temperature, K S1 is the temperature compensation coefficient of the first target structure.

[0072] In practice, for example, if the water temperature is 10°C, the first structure temperature is 10°C, the target water temperature compensation coefficient is 3.89, and the first target structure temperature compensation coefficient is 4.35. The controller can calculate T according to Formula 1. A1 =10×3.89+10×4.35=82.4℃, that is, the target preheated water outlet temperature is 82.4℃. For another example: the water storage temperature is 15℃, the first structure temperature is 30℃, the target water storage temperature compensation coefficient is 2.35, and the first target structure temperature compensation coefficient is 1.23. The controller can calculate T according to formula 1 A1 =15×2.35+30×1.23=72.15℃, that is, the target preheating water outlet temperature is 72.15℃.

[0073] Optional, Figure 4 A flow chart of another range hood self-cleaning method provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the preheating process also includes the following steps:

[0074] Step 401 : During the preheating process, the water temperature of the second nozzle and the third structure temperature of the structure to be cleaned are obtained.

[0075] During implementation, the controller controls the heater and water pump to operate according to the target preheating outlet water temperature to preheat the structure to be cleaned. During the preheating process, if the ambient temperature fluctuates or the pipe temperature drops significantly, the original target preheating outlet water temperature may not meet the structural temperature requirement of the structure to be cleaned greater than 70°C. In this case, the controller uses the structure temperature sensor to be cleaned and the nozzle outlet water temperature sensor to monitor the third structural temperature of the structure to be cleaned and the second nozzle outlet water temperature at the nozzle in real time, and provides real-time feedback to the controller.

[0076] Step 402 : Inquiring a second target nozzle outlet water temperature compensation coefficient corresponding to a second nozzle outlet water temperature in a pre-stored second correspondence between nozzle outlet water temperature and nozzle outlet water temperature compensation coefficient.

[0077] In implementation, the controller searches for the second target nozzle outlet water temperature compensation coefficient corresponding to the second nozzle outlet water temperature in the pre-stored second correspondence between the nozzle outlet water temperature and the nozzle outlet water temperature compensation coefficient. Table 4 shows the second correspondence between the nozzle outlet water temperature and the nozzle outlet water temperature compensation coefficient provided in the embodiment of the present application, as shown in Table 4:

[0078] Table 4

[0079] <![CDATA[The water temperature T of the nozzle outlet water N2 > <![CDATA[Nozzle outlet water temperature compensation coefficient K N2 > ＜60℃ 0.95 60℃～65℃ 0.88 65℃～70℃ 0.74 70℃～75℃ 0.58 75℃～80℃ 0.58 80℃～85℃ 0.54 85℃～90℃ 0.53 ＞90℃ 0.46

[0080] Step 403 : Inquiring a third target structural temperature compensation coefficient corresponding to the third structural temperature in a pre-stored third correspondence between structural temperatures and structural temperature compensation coefficients.

[0081] In implementation, the controller queries the third target structural temperature compensation coefficient corresponding to the third structural temperature in the pre-stored third correspondence between the structural temperature and the structural temperature compensation coefficient. Table 5 is the third correspondence between the structural temperature and the structural temperature compensation coefficient provided in the embodiment of the present application, as shown in Table 5:

[0082] Table 5

[0083] <![CDATA[Structural temperature T S3 > <![CDATA[Structural temperature compensation coefficient K S3 > 25℃～30℃ 1.24 30℃～35℃ 1.12 35℃～40℃ 1.03 40℃～45℃ 1.01 45℃～50℃ 0.95 50℃～55℃ 0.88 55℃～60℃ 0.74 60℃～65℃ 0.71 65℃～70℃ 0.57 70℃～75℃ 0.54 75℃～80℃ 0.5 80℃～85℃ 0.52

[0084] Step 404 : determining a target preheating outlet water correction temperature based on the second nozzle outlet water temperature, the second target nozzle outlet water temperature compensation coefficient, the third structure temperature, and the third target structure temperature compensation coefficient, so that the heater is preheated according to the target preheating outlet water correction temperature.

[0085] During implementation, the controller determines the target preheating outlet water correction temperature based on the second nozzle outlet water temperature, the second target nozzle outlet water temperature compensation coefficient, the third structure temperature and the third target structure temperature compensation coefficient, so that the heater is preheated according to the target preheating outlet water correction temperature.

[0086] As an optional embodiment, in step 404, the target preheated water outlet correction temperature is determined according to the second nozzle outlet water temperature, the second target nozzle outlet water temperature compensation coefficient, the third structure temperature, and the third target structure temperature compensation coefficient. The formula is as follows:

[0087] T A3 =T N2 ×K N2 +T S3 ×K S3 (Formula 2);

[0088] Among them, T A3 The target preheated water outlet temperature of the heater, T N1 is the water temperature of the second nozzle, K N is the water temperature compensation coefficient of the second target nozzle, T S3 is the third structure temperature, K S3 is the temperature compensation coefficient of the third target structure.

[0089] In practice, for example, if the water temperature of the second nozzle is 63°C and the temperature of the third structure is 56°C, the second target nozzle water temperature compensation coefficient is 0.88 and the first target structure temperature compensation coefficient is 0.74. The controller can calculate T according to formula 2. A3 = 63 × 0.88 + 56 × 0.74 = 96.88°C, i.e., the target corrected preheated water outlet temperature is 96.88°C. The controller controls the heater to adjust the preheated water outlet temperature to 96.88°C and performs preheating at this temperature. The controller continues to monitor the second nozzle outlet water temperature and the third structure temperature of the structure to be cleaned. If the second nozzle outlet water temperature and the third structure temperature of the structure to be cleaned are respectively lower than the preset nozzle outlet water temperature threshold and structure temperature threshold, the controller continues to perform temperature compensation according to the method of steps 402-404.

[0090] As an optional implementation, the method further includes:

[0091] In the pre-stored correspondence between the preheating outlet water temperature and the preheating time, the target preheating time corresponding to the target preheating outlet water temperature is queried, and the heater is controlled to perform preheating work according to the target preheating time and the target preheating outlet water temperature.

[0092] In practice, the controller queries the target preheating time corresponding to the target preheating outlet water temperature in the pre-stored correspondence between the preheating outlet water temperature and the preheating time, and controls the heater to perform preheating according to the target preheating time and the target preheating outlet water temperature. Table 6 shows the correspondence between the preheating outlet water temperature and the preheating time provided in the embodiment of the present application, as shown in Table 6:

[0093] Table 6

[0094] Preheating water outlet temperature Warm-up time Preheating water outlet temperature Warm-up time 90℃ 180s 85℃ 150s 85℃ 150s 75℃ 120s 80℃ 135s 75℃ 105s 75℃ 120s 72℃ 90s 85℃ 165s 80℃ 135s 82℃ 135s 75℃ 105s 80℃ 120s 72℃ 90s 75℃ 105s 70℃ 60s

[0095] Optionally, if the controller calculates the target preheated water outlet correction temperature according to steps 401-404, it queries Table 6 according to the target preheated water outlet correction temperature and performs preheating according to the queried preheating time.

[0096] Step 203 : During the cleaning phase, the water temperature of the first nozzle and the second structure temperature of the structure to be cleaned are obtained.

[0097] In practice, the cleaning phase includes one or more of hot water cleaning and steam cleaning, which can be steam cleaning first and then hot water cleaning, or direct hot water cleaning. During the cleaning phase, the controller obtains the water temperature of the first nozzle and the second structure temperature of the structure to be cleaned.

[0098] Step 204 : determining a target outlet water temperature of the heater according to the outlet water temperature of the first nozzle and the temperature of the second structure, and controlling the heater to perform a cleaning operation according to the target outlet water temperature.

[0099] In implementation, the controller determines the target cleaning water outlet temperature of the heater according to the water outlet temperature of the first nozzle and the second structure temperature, and controls the heater to perform cleaning work according to the target cleaning water outlet temperature.

[0100] Optional, Figure 5 A flow chart of another range hood self-cleaning method provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the specific steps of determining the target washing water outlet temperature of the heater according to the water temperature of the first nozzle and the second structure temperature in step 204 are as follows:

[0101] Step 501: If the outlet water temperature of the first nozzle is lower than the preset nozzle outlet water temperature threshold, the product of the preset cleaning basic temperature and the preset basic temperature compensation coefficient is determined as the target outlet water temperature.

[0102] In practice, after the preheating stage, the structural temperature of the structure to be cleaned can basically be maintained above 60°C, so the preset structural temperature threshold can be 60°C. Theoretically, if it is steam cleaning, the preset cleaning basic temperature is 105°C, and the nozzle outlet water temperature should be maintained at 105°C, with a minimum of 90°C. If it is hot water cleaning, the preset cleaning basic temperature is 95°C, and the nozzle outlet water temperature should be maintained at 95°C, with a minimum of 85°C. The higher the nozzle outlet water temperature, the higher the structural temperature. However, during the actual cleaning process, due to heat loss, the nozzle outlet water temperature cannot reach the preset cleaning basic temperature. Therefore, the controller monitors the nozzle outlet water temperature and the structural temperature in real time. If the first nozzle outlet water temperature is lower than the preset nozzle outlet water temperature threshold, the product of the preset cleaning basic temperature and the preset basic temperature compensation coefficient is determined as the target cleaning outlet water temperature. For example, during steam cleaning, the water temperature at the outlet of the first nozzle is 85°C, which is lower than the preset nozzle outlet water temperature threshold of 90°C, and the temperature of the second structure is 55°C. At this time, the controller multiplies the preset cleaning base temperature by the preset base temperature compensation coefficient (e.g., 1.09), i.e., 105×1.09=114.45°C, as the target cleaning water outlet temperature to ensure that the nozzle outlet water temperature is maintained at approximately 105°C. For another example, during hot water cleaning, the water temperature at the outlet of the first nozzle is 80°C, which is lower than the preset nozzle outlet water temperature threshold of 85°C, and the temperature of the second structure is 55°C. At this time, the controller multiplies the preset cleaning base temperature by the preset base temperature compensation coefficient (e.g., 1.12), i.e., 95×1.12=106.4°C, as the target cleaning water outlet temperature to ensure that the nozzle outlet water temperature is maintained at approximately 95°C.

[0103] Step 502: If the water temperature of the first nozzle outlet water temperature is greater than or equal to the preset nozzle outlet water temperature threshold, then in the first correspondence between the nozzle outlet water temperature and the nozzle outlet water temperature compensation coefficient stored in advance, the first target nozzle outlet water temperature compensation coefficient corresponding to the first nozzle outlet water temperature is queried, and in the second correspondence between the structure temperature and the structure temperature compensation coefficient stored in advance, the second target structure temperature compensation coefficient corresponding to the second structure temperature is queried.

[0104] In implementation, if the water temperature at the outlet of the first nozzle is greater than or equal to a preset nozzle outlet water temperature threshold, and the second structural temperature is greater than or equal to a preset structural temperature threshold, the controller queries the first target nozzle outlet water temperature compensation coefficient corresponding to the first nozzle outlet water temperature in the pre-stored first correspondence between the nozzle outlet water temperature and the nozzle outlet water temperature compensation coefficient, and queries the second target structural temperature compensation coefficient corresponding to the second structural temperature in the pre-stored second correspondence between the structural temperature and the structural temperature compensation coefficient. Table 7 shows the first correspondence between the nozzle outlet water temperature and the nozzle outlet water temperature compensation coefficient provided in the embodiment of the present application, and Table 8 shows the second correspondence between the structural temperature and the structural temperature compensation coefficient provided in the embodiment of the present application, as shown in Tables 7 and 8:

[0105] Table 7

[0106]

[0107]

[0108] Table 8

[0109]

[0110] According to the cleaning stage, the controller queries the first target nozzle outlet water temperature compensation coefficient corresponding to the first nozzle outlet water temperature, and the second target structure temperature compensation coefficient corresponding to the second structure temperature. For example, the preset cleaning stage is hot water cleaning, the first nozzle outlet water temperature is 98°C, and the second structure temperature is 86°C. The controller queries Table 7 and Table 8 respectively, and finds that the first target nozzle outlet water temperature compensation coefficient is 0.56, and the second target structure temperature compensation coefficient is 0.575.

[0111] Step 503 : determining a target outlet water temperature for cleaning according to the first nozzle outlet water temperature, the first target nozzle outlet water temperature compensation coefficient, the second structure temperature, and the second target structure temperature compensation coefficient.

[0112] In implementation, the controller determines the target washing water outlet temperature based on the first nozzle water outlet temperature, the first target nozzle water outlet temperature compensation coefficient, the second structure temperature and the second target structure temperature compensation coefficient.

[0113] As an optional embodiment, in step 403, the target washing water outlet temperature is determined according to the first nozzle outlet water temperature, the first target nozzle outlet water temperature compensation coefficient, the second structure temperature, and the second target structure temperature compensation coefficient. The formula is as follows:

[0114] T A2 =T N1 ×K N1 +T S2 ×K S2 (Formula 2);

[0115] Among them, T A2 is the target outlet water temperature of the heater, T N is the outlet water temperature of the first nozzle, K N is the first target nozzle outlet water temperature compensation coefficient, T S2 is the second structure temperature, K S2 is the temperature compensation coefficient of the second target structure.

[0116] In practice, for example, the preset cleaning stage is hot water cleaning, the first nozzle outlet water temperature is 98°C, the second structure temperature is 86°C, the first target nozzle outlet water temperature compensation coefficient is 0.56, and the second target structure temperature compensation coefficient is 0.575. The target cleaning water outlet temperature T is calculated according to Formula 2. A2 =98×0.56+86×0.575=104.33°C. That is, the controller controls the heating tube to adjust the water outlet temperature to 104.33°C, which can ensure that the water outlet temperature of the nozzle is not lower than 95°C after calibration.

[0117] For example, if the preset cleaning stage is steam cleaning, the water temperature of the first nozzle outlet is 98°C and the second structure temperature is 86°C. The controller queries Table 7 and Table 8 to find that the first target nozzle outlet water temperature compensation coefficient is 0.58 and the second target structure temperature compensation coefficient is 0.61. The target cleaning water outlet temperature T is calculated according to Formula 2. A2 =98×0.58+86×0.61=109.3°C. That is, the controller controls the heating tube to adjust the water outlet temperature to 109.3°C, which can ensure that the water outlet temperature (steam) of the nozzle after calibration is not lower than 105°C.

[0118] Optional, Figure 6 This is a flow chart of an example of a range hood self-cleaning method provided in an embodiment of the present application, such as Figure 6 As shown, the specific steps for range hood self-cleaning are as follows:

[0119] Step 601: The controller starts self-cleaning according to a user instruction;

[0120] Step 602: The controller outputs the target preheating outlet water temperature and preheating time based on the stored water temperature and the first structure temperature, and generates a preheating instruction to send to the water pump and heater.

[0121] Step 603: The water pump and heater are preheated according to the preheating instruction;

[0122] Step 604: The controller obtains the water temperature of the second nozzle and the third structure temperature of the structure to be cleaned, and determines whether to adjust the target preheating water temperature;

[0123] If yes, then execute step 605, if not, execute step 606;

[0124] Step 605: The controller outputs a target preheating outlet water correction temperature based on the water temperature of the second nozzle and the third structure temperature of the structure to be cleaned, updates the preheating instruction and sends it to the water pump and heater, and then executes step 603;

[0125] Step 606, determining whether the running time reaches the preheating time;

[0126] If yes, go to step 607, if no, go to step 603;

[0127] Step 607: The controller generates a steam cleaning instruction according to the preset first cleaning water outlet temperature and first cleaning time, and sends it to the water pump and heater;

[0128] Step 608 , the water pump and heater perform steam cleaning according to the steam cleaning instruction;

[0129] If yes, execute step 609, if no, execute step 610;

[0130] Step 609: The controller obtains the water temperature of the first nozzle and the second structure temperature of the structure to be cleaned, and determines whether to adjust the first cleaning water temperature;

[0131] If yes, execute step 610, if no, execute step 611;

[0132] Step 610: The controller outputs a first target cleaning water outlet temperature based on the water temperature of the first nozzle and the second structure temperature of the structure to be cleaned, and updates the steam cleaning instruction to send to the water pump and heater, and then executes step 608;

[0133] Step 611, determining whether the running time reaches the first cleaning time;

[0134] If yes, execute step 612, if no, execute step 608;

[0135] Step 612: The controller generates a hot water cleaning instruction according to the preset second cleaning water outlet temperature and second cleaning time, and sends it to the water pump and heater;

[0136] Step 613: The water pump and heater perform hot water cleaning according to the hot water cleaning instruction;

[0137] If yes, go to step 614, if no, go to step 615;

[0138] Step 614: The controller obtains the water temperature of the third nozzle and the fourth structure temperature of the structure to be cleaned, and determines whether to adjust the second cleaning water temperature.

[0139] If yes, execute step 615, if no, execute step 616;

[0140] Step 615: The controller outputs a second target cleaning water outlet temperature based on the water temperature of the third nozzle and the fourth structure temperature of the structure to be cleaned, updates a hot water cleaning instruction, and sends it to the water pump and heater, and then executes step 613;

[0141] Step 616, determining whether the running time reaches the second cleaning time;

[0142] If yes, execute step 617, if no, execute step 603;

[0143] Step 617, air drying stage;

[0144] Step 618, self-cleaning ends.

[0145] An embodiment of the present application provides a range hood self-cleaning method, the method comprising: in the preheating stage, obtaining the water temperature of the water stored in the water cup and the first structural temperature of the structure to be cleaned; determining the target preheating water outlet temperature of the heater based on the water temperature and the first structural temperature, and controlling the heater to perform preheating work according to the target preheating water outlet temperature; in the cleaning stage, obtaining the water temperature of the first nozzle water outlet and the second structural temperature of the structure to be cleaned; determining the target cleaning water outlet temperature of the heater based on the first nozzle water outlet temperature and the second structural temperature, and controlling the heater to perform cleaning work according to the target cleaning water outlet temperature. During the automatic cleaning process of the range hood, the hot water or steam heated by the heater is affected by the ambient temperature, resulting in heat loss and a decrease in temperature. The present application determines the target preheating water outlet temperature by obtaining the water temperature of the water stored in the water cup and the first structural temperature of the structure to be cleaned. By obtaining the water temperature of the first nozzle outlet and the second structure temperature of the structure to be cleaned, the cleaning water outlet temperature is compensated, and then the target cleaning water outlet temperature is determined. This method can ensure that the nozzle water outlet temperature and the temperature of the hot water or steam sprayed onto the structure to be cleaned meet the cleaning requirements, effectively control the water outlet temperature of the heater, and avoid energy waste caused by too high water outlet temperature or incomplete oil cleaning caused by too low water outlet temperature.

[0146] It should be understood that although Figures 2 to 5 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. In addition, Figures 2 to 5At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The order of execution of these steps or stages is not necessarily one by one, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0147] It can be understood that the same / similar parts between the various embodiments of the above method in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments. For related parts, please refer to the description of other method embodiments.

[0148] For specific definitions of the range hood, please refer to the definitions of the range hood self-cleaning method above and will not be repeated here. Each module in the range hood described above can be implemented in whole or in part through software, hardware, or a combination thereof. Each of the modules described above can be embedded in or independent of a processor in a computer device in hardware form, or can be stored in a computer device memory in software form, so that the processor can call and execute the corresponding operations of each module.

[0149] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this 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. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), 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).

[0150] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0151] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0152] Each embodiment in this specification is described in a related manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiment is generally similar to the method embodiment, so the description is relatively simple. For related parts, refer to the description of the method embodiment.

[0153] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0154] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A range hood self-cleaning method, characterized in that: The method comprises: During the preheating phase, the water temperature in the water cup and the first structural temperature of the structure to be cleaned are obtained; determining a target preheating outlet water temperature of the heater according to the stored water temperature and the first structure temperature, and controlling the heater to perform preheating according to the target preheating outlet water temperature; During the cleaning phase, the water temperature of the first nozzle and the second structure temperature of the structure to be cleaned are obtained; determining a target outlet water temperature for cleaning of the heater according to the outlet water temperature of the first nozzle and the temperature of the second structure, and controlling the heater to perform cleaning according to the target outlet water temperature; The step of determining a target preheating outlet water temperature of the heater according to the stored water temperature and the first structure temperature includes: In the pre-stored correspondence between the water storage temperature, the structure temperature and the preheated water outlet temperature, querying the target preheated water outlet temperature corresponding to the water storage temperature and the first structure temperature; The step of determining a target preheating outlet water temperature of the heater according to the stored water temperature and the first structure temperature includes: Determining a target water storage temperature compensation coefficient corresponding to the water storage temperature in the water cup in a pre-stored first correspondence between the water storage temperature and the water storage temperature compensation coefficient; Determining a first target structural temperature compensation coefficient corresponding to the first structural temperature in a pre-stored first correspondence between structural temperatures and structural temperature compensation coefficients; determining a target preheating outlet water temperature of the heater according to the stored water temperature, the target stored water temperature compensation coefficient, the first structural temperature, and the first target structural temperature compensation coefficient; The formula for determining the target preheating outlet water temperature of the heater based on the stored water temperature, the target stored water temperature compensation coefficient, the first structural temperature, and the first target structural temperature compensation coefficient is: T A1 = T G ×K G + T S1 ×K S1 ; Among them, T A1 is the target preheating water outlet temperature of the heater, T G is the storage water temperature, K G is the target water temperature compensation coefficient, T S1 is the first structural temperature, K S1 is the temperature compensation coefficient of the first target structure.

2. The method according to claim 1, characterized in that The method further comprises: In the pre-stored correspondence between the preheating outlet water temperature and the preheating time, the target preheating time corresponding to the target preheating outlet water temperature is queried, and the heater is controlled to perform preheating according to the target preheating time.

3. The method according to claim 1, characterized in that The step of determining a target washing water outlet temperature of the heater according to the first nozzle water outlet temperature and the second structure temperature includes: If the water temperature of the first nozzle outlet water is lower than a preset nozzle outlet water temperature threshold, the product of a preset cleaning basic temperature and a preset basic temperature compensation coefficient is determined as the target cleaning water outlet temperature; If the first nozzle outlet water temperature is greater than or equal to a preset nozzle outlet water temperature threshold, querying a first target nozzle outlet water temperature compensation coefficient corresponding to the first nozzle outlet water temperature in a pre-stored first correspondence between nozzle outlet water temperatures and nozzle outlet water temperature compensation coefficients, and querying a second target structural temperature compensation coefficient corresponding to the second structural temperature in a pre-stored second correspondence between structural temperatures and structural temperature compensation coefficients; The target washing water outlet temperature is determined according to the first nozzle water outlet temperature, the first target nozzle water outlet temperature compensation coefficient, the second structure temperature and the second target structure temperature compensation coefficient.

4. The method according to claim 3, characterized in that The formula for determining the target washing water outlet temperature based on the first nozzle water outlet temperature, the first target nozzle water outlet temperature compensation coefficient, the second structure temperature, and the second target structure temperature compensation coefficient is: T A2 = T N1 ×K N1 + T S2 ×K S2 ; Among them, T A2 is the target outlet water temperature of the heater, T N is the outlet water temperature of the first nozzle, K N is the water temperature compensation coefficient of the first target nozzle, T S2 is the second structure temperature, K S2 is the temperature compensation coefficient of the second target structure.

5. The method according to claim 1, wherein The method further comprises: During the preheating process, the water temperature of the second nozzle and the third structure temperature of the structure to be cleaned are obtained; In the pre-stored second correspondence between the nozzle outlet water temperature and the nozzle outlet water temperature compensation coefficient, querying the second target nozzle outlet water temperature compensation coefficient corresponding to the second nozzle outlet water temperature; In a pre-stored third correspondence between structural temperatures and structural temperature compensation coefficients, querying a third target structural temperature compensation coefficient corresponding to the third structural temperature; A target preheating outlet water correction temperature is determined based on the second nozzle outlet water temperature, the second target nozzle outlet water temperature compensation coefficient, the third structural temperature, and the third target structural temperature compensation coefficient, so that the heater is preheated according to the target preheating outlet water correction temperature.

6. The method according to claim 5, characterized in that The formula for determining the target preheating outlet water correction temperature based on the second nozzle outlet water temperature, the second target nozzle outlet water temperature compensation coefficient, the third structure temperature, and the third target structure temperature compensation coefficient is: T A3 = T N2 ×K N2 + T S3 ×K S3 ; Among them, T A3 The target preheated water outlet temperature of the heater, T N1 is the water temperature of the second nozzle, K N is the water temperature compensation coefficient of the second target nozzle, T S3 is the third structure temperature, K S3 is the temperature compensation coefficient of the third target structure.

7. A range hood, characterized in that: The range hood includes a controller, a nozzle water outlet temperature sensor, a temperature sensor of a structure to be cleaned, a water temperature sensor in a water cup, a nozzle, a structure to be cleaned, a heater, a water pump and a water cup. The structure to be cleaned includes one or more of a volute and a wind wheel. The nozzle water outlet temperature sensor obtains the nozzle water outlet temperature and sends it to the controller. The structure to be cleaned temperature sensor obtains the structural temperature of the structure to be cleaned and sends it to the controller. The water temperature sensor in the water cup obtains the water temperature in the water cup and sends it to the controller. The water pump draws the stored water in the water cup to the heater. The heater heats the stored water to generate hot water or steam. The hot water or steam is sprayed to the structure to be cleaned through the nozzle. The controller controls the heater, the water pump, the nozzle water outlet temperature sensor, the temperature sensor of the structure to be cleaned and the water temperature sensor in the water cup to implement the method according to any one of claims 1 to 6.

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