CN207438674U - Range hood and its cleaning device - Google Patents

Abstract

The utility model discloses a range hood and a cleaning device thereof. The device comprises: a water pump, which is used to extract cleaning liquid when it is turned on; a heating component, which is connected with the water pump; a temperature sensor, which is set corresponding to the heating component, It is used to detect the temperature of the heating component; the nozzle is connected to the heating component; the control module is connected to the water pump, the heating component and the temperature sensor respectively, and the control module controls the heating component to heat when the range hood starts the cleaning program. And after the temperature of the heating component reaches the first preset temperature for the first time, control the water pump to turn on the first preset time and turn off the second preset time in each cleaning cycle, wherein, when the water pump is turned on, the cleaning liquid is pumped to the heating The component is heated to generate a high-temperature and high-pressure water-steam mixture, and the water-steam mixture is sprayed out from the nozzle to clean the range hood. According to the device of the utility model, the cleaning effect of the range hood can be improved.

Description

Range hood and its cleaning device

technical field

The utility model relates to the technical field of household appliances, in particular to a cleaning device for a range hood and a range hood.

Background technique

After the range hood works for a long time, its internal oil will become more and more dirty, resulting in a decrease in its performance (such as increased noise, reduced air volume, increased power consumption, etc.), and bacteria and mold colonies are prone to occur inside the range hood. Therefore, The range hood needs to be cleaned after working for a period of time.

At present, the cleaning methods of range hoods on the market mainly include hot water cleaning and steam cleaning. Due to the low temperature of hot water cleaning, the cleaning effect of oil stains is not good. At the same time, because the water has no phase change during the heating process, the volume change of hot water cleaning is small, and the impact force only depends on the large flow provided by the water pump, so the cleaning pressure is small; steam cleaning is due to the steam After spraying for a certain distance, the temperature drops rapidly under the effect of expansion and work. On the one hand, the distance between the nozzle and the cleaning surface is required to be very close, and on the other hand, it is still difficult to maintain the cleaning temperature at a high level. Therefore, the above-mentioned cleaning method still needs to be improved for the cleaning effect of the range hood.

Utility model content

The utility model aims to solve one of the technical problems in the above-mentioned technologies at least to a certain extent. Therefore, an object of the present invention is to provide a cleaning device for a range hood, which not only has a high cleaning pressure, but also has a high cleaning temperature and slow attenuation, thereby greatly improving the cleaning effect of the range hood.

The second purpose of the utility model is to provide a range hood.

In order to achieve the above purpose, a cleaning device for a range hood proposed in the first aspect of the utility model includes: a water pump, the water pump is used to extract the cleaning liquid when it is turned on; a heating assembly, the heating assembly is connected to the water pump a temperature sensor, the temperature sensor is set corresponding to the heating assembly, and the temperature sensor is used to detect the temperature of the heating assembly; a nozzle, the nozzle is connected to the heating assembly; a control module, the control module respectively connected to the water pump, the heating assembly and the temperature sensor, the control module controls the heating assembly to heat when the range hood starts the cleaning program, and the temperature of the heating assembly reaches the first preset temperature for the first time. After the temperature is set, the water pump is controlled to be turned on for a first preset time and turned off for a second preset time in each cleaning cycle, wherein, when the water pump is turned on, the cleaning liquid is pumped into the heating assembly for cleaning. heating to generate a high-temperature and high-pressure water-steam mixture, and the water-steam mixture is sprayed out from the nozzle to clean the range hood.

According to the cleaning device of the range hood of the utility model, the control module is respectively connected with the water pump, the heating assembly and the temperature sensor, and the control module controls the heating assembly to heat when the range hood starts the cleaning program, and the temperature of the heating assembly reaches the first After a preset temperature, the water pump is controlled to be turned on for the first preset time and turned off for the second preset time in each cleaning cycle, wherein, when the water pump is turned on, the cleaning liquid is pumped into the heating element for heating to generate high temperature and high pressure The water vapor mixture is sprayed out from the nozzle to clean the range hood, so that not only the cleaning pressure is high, but also the cleaning temperature is high and the attenuation is slow, so that the cleaning effect of the range hood can be greatly improved.

In addition, the cleaning device for the range hood proposed above according to the utility model can also have the following additional technical features:

Further, the heating assembly includes a liquid storage chamber and a heating element corresponding to the liquid storage chamber, the inlet of the liquid storage chamber is connected to the water pump, and the outlet of the liquid storage chamber is connected to the nozzle.

Further, the control module includes: a timer, the timer is used to time the first preset time, the second preset time and the duration of the cleaning program; a power supply unit, the power supply The unit is respectively connected with the heating element and the water pump, wherein the power supply unit controls the heating element to turn on heating by supplying power to the heating element, and controls the heating of the heating element by supplying power to the water pump or stopping power supply. The water pump is turned on or off.

Further, the cleaning device of the range hood further includes: a pressure relief valve, the pressure relief valve is arranged between the water pump and the inlet of the liquid storage chamber, so that the pressure in the liquid storage chamber Open pressure relief when the pressure threshold is greater than.

Wherein, the first preset temperature is 120-160°C.

Wherein, the first preset time is 1-3s, the second preset time is 3-8s, and the duration of the cleaning program is 4-12 minutes.

To achieve the above purpose, a range hood proposed in the second aspect of the utility model includes the cleaning device for the range hood proposed in the first aspect of the utility model.

According to the range hood of the utility model, the cleaning device not only has high cleaning pressure, but also has high cleaning temperature and slow attenuation, so the cleaning effect is better.

Description of drawings

Fig. 1 is a schematic block diagram of a cleaning device for a range hood according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of a cleaning device for a range hood according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a cleaning device for a range hood according to an embodiment of the present invention;

Fig. 4 is a control curve diagram of a cleaning device of a range hood according to an embodiment of the present invention;

Fig. 5 is a flowchart of a control method of a cleaning device for a range hood according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

The range hood and its cleaning device according to the embodiment of the utility model will be described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic block diagram of a cleaning device for a range hood according to an embodiment of the present invention.

As shown in FIG. 1 , the cleaning device of the range hood in the embodiment of the present utility model includes a water pump 100 , a heating assembly 200 , a temperature sensor 300 , a spray pipe 400 and a control module 500 .

Wherein, the water pump 100 is used to extract the cleaning liquid when it is turned on; the heating assembly 200 is connected to the water pump 100; the temperature sensor 300 is set corresponding to the heating assembly 200, and the temperature sensor 300 is used to detect the temperature of the heating assembly 200; the nozzle 400 is connected to the heating assembly 200 The control module, 500 is connected to the water pump 100, the heating assembly 200 and the temperature sensor 300 respectively, the control module 500 controls the heating assembly 200 to heat when the range hood starts the cleaning program, and the temperature of the heating assembly 200 reaches the first preset for the first time temperature, control the water pump 100 to turn on the first preset time and turn off the second preset time in each cleaning cycle, wherein, when the water pump 100 is turned on, the cleaning liquid is pumped into the heating assembly 200 for heating to generate high temperature and high pressure The water vapor mixture is sprayed out from the nozzle 400 to clean the range hood.

As shown in FIG. 2 , the cleaning device according to the embodiment of the present invention may further include a water cup 600 for storing cleaning liquids such as water, oil decomposing liquid or a mixture of water and oil decomposing liquid. As shown in FIG. 3 , the inlet of the water pump 100 can be connected to the water cup 600 through the first water pipe 01 , so as to draw cleaning liquid from the water cup 600 when the water pump 100 is turned on.

As shown in FIGS. 2 and 3 , the heating assembly 200 may include a liquid storage chamber 210 and a heating element 220 corresponding to the liquid storage chamber 210 . The inlet of the liquid storage chamber 210 is connected to the water pump 100 through the second water pipe 02 . The liquid storage chamber 210 The outlet of is connected to the joint 211 through the third water pipe 03 so as to be connected with the spray pipe 400 .

As shown in Fig. 2, the cleaning device of the embodiment of the present invention can also include a pressure relief valve 700, and the pressure relief valve 700 is arranged between the water pump 100 and the inlet of the liquid storage chamber 210, so that the pressure in the liquid storage chamber 210 is greater than Turn on the pressure relief when the pressure threshold is reached. In a specific embodiment of the present invention, the pressure relief valve 700 can be integrally arranged in the water pump 100 or at the outlet of the water pump 100 .

As shown in Figure 3, the control module 500 can be arranged on the control board, and the control module 500 can be connected to the water pump 100 through the first power line 04, and connected to the heating assembly 200 through the second power line 05 so as to serve the water pump 100 and the heating assembly 200 for power supply. The control module 500 is also connected to the temperature sensor 300 through the wire 06 , so as to supply power to the temperature sensor 300 and receive the temperature detected by the temperature sensor 300 .

In one embodiment of the present utility model, the control module 500 may include a timer and a power supply unit, wherein the timer is used to time the first preset time, the second preset time and the duration of the cleaning procedure; the power supply unit respectively It is connected with the heating element 220 and the water pump 100, wherein the power supply unit controls the heating element to start heating by supplying power to the heating element 220, and controls the water pump 100 to turn on or off by supplying power to the water pump 100 or stopping power supply.

Specifically, when the range hood starts the cleaning program, the power supply unit in the control module 500 can supply power to the heating element 220 to control the heating element 220 to turn on and heat the liquid storage chamber 210 . As shown in FIG. 4, the heating element 220 is continuously turned on throughout the cleaning procedure.

The temperature sensor 300 can detect the temperature of the heating element 220 or the liquid storage chamber 210 . As shown in FIG. 4 , after the heating element 220 is turned on, the temperature of the heating assembly 200 detected by the temperature sensor 300 continues to rise. The power supply unit in 500 can supply power to the water pump 100 to control the water pump 100 to turn on to pump the cleaning liquid into the liquid storage chamber 210 . Since the temperature of the heating element 200 reaches the first preset temperature, that is, the temperature of the liquid storage chamber 210 is relatively high, when the cleaning liquid is pumped into the liquid storage chamber 210, it can be instantly vaporized and expanded to generate high-pressure steam and high-temperature liquid cleaning liquid , the water vapor mixture. As shown in FIG. 2 , the nozzle 400 includes a plurality of nozzle holes 410 , and the high-pressure steam and high-temperature liquid cleaning liquid can be sprayed through the plurality of nozzle holes 410 to the position to be cleaned in the range hood under high-pressure push. The heat carried by the high-temperature liquid cleaning liquid can reduce the heat loss of the steam during the spraying process, and the impact force of the steam, that is, the cleaning pressure is relatively high, so that the range hood can be effectively cleaned by the water-steam mixture. As shown in FIG. 4 , the cleaning pressure, that is, the pressure of the liquid storage chamber 210 may increase with the instantaneous heating of the cleaning liquid, and decrease with the spraying of the water vapor mixture. Wherein, the first preset temperature is the temperature at which the cleaning liquid can be instantly vaporized and expanded when it is pumped into the liquid storage chamber 210 to generate high-pressure steam and high-temperature liquid cleaning liquid. In a specific embodiment of the present invention, the first A preset temperature is 120-160°C.

It should be understood that as the cleaning liquid continues to enter, the temperature of the liquid storage chamber 210 may decrease as the cleaning liquid absorbs heat. That is, as shown in FIG. 4 , after the water pump 100 is turned on for a period of time, the temperature of the heating component 200 may show a downward trend. When the temperature of the heating component 200 is low, the cleaning pressure may be difficult to meet the cleaning requirements. Therefore, in the embodiment of the present invention, when the on time of the water pump 100 is counted by the timer and reaches the first preset time T1, the water pump 100 can be controlled to be turned off so that the temperature of the heating element 200 rises again. After maintaining the closed state of the water pump 100 and reaching the second preset time T2 by the timer, the water pump 100 can be controlled to turn on again, so that the cleaning pressure can be increased again to spray high-pressure steam and high-temperature liquid cleaning liquid into the range hood. The cleaning position realizes the cleaning of the range hood.

Further, as shown in FIG. 4 , the time period T from the temperature of the heating assembly 200 reaching the first preset temperature for the first time to the end of the cleaning program may include a plurality of cleaning cycles, and each cleaning cycle may be divided into a first preset time T1 and a second preset time T2, and control the water pump 100 to turn on at the first preset time T1, and control the water pump 100 to turn off at the second preset time T2. That is to say, the above-mentioned process of controlling the water pump 100 to be turned on for the first preset time T1 and to be turned off for the second preset time T2 may be executed cyclically, so as to realize the pulse cleaning of the range hood. In a specific embodiment of the present invention, the first preset time is 1-3 s, the second preset time is 3-8 s, and the duration of the cleaning program is 4-12 min. The whole cleaning procedure may include 20-160 cleaning cycles, that is, 20-160 pulse cleanings may be performed in the whole cleaning procedure.

In other embodiments of the present invention, the water pump 100 can also be controlled to turn on every time the temperature of the heating assembly 200 reaches the first preset temperature, and the water pump 100 can be turned off when the turn-on time of the water pump 100 reaches the first preset time. In this way, the cleaning cycle can be determined according to the temperature of the heating assembly 200 and the first preset time without timing the second preset time.

According to the cleaning device of the range hood in the embodiment of the present invention, the control module is respectively connected with the water pump, the heating assembly and the temperature sensor. After reaching the first preset temperature, the water pump is controlled to be turned on for the first preset time and turned off for the second preset time in each cleaning cycle, wherein, when the water pump is turned on, the cleaning liquid is pumped into the heating component for heating to generate high temperature The high-pressure water-vapor mixture is ejected from the nozzle to clean the range hood. Therefore, not only the cleaning pressure is high, but also the cleaning temperature is high and the attenuation is slow, which can greatly improve the cleaning effect of the range hood.

Corresponding to the above embodiments, the utility model also proposes a range hood.

The range hood of the embodiment of the utility model includes the cleaning device for the range hood proposed in the above-mentioned embodiment of the utility model, and its specific implementation may refer to the above-mentioned embodiment, and in order to avoid redundancy, details are not repeated here.

According to the range hood of the embodiment of the utility model, the cleaning device of the cleaning device not only has high cleaning pressure, but also has high cleaning temperature and slow attenuation, so the cleaning effect is better.

Corresponding to the above-mentioned embodiments, the utility model also proposes a control method for a cleaning device of a range hood.

Referring to the above-mentioned embodiment and Fig. 1 to Fig. 3, the cleaning device of the embodiment of the present invention includes a water pump, a heating assembly, a temperature sensor and a spray pipe. The water pump is used to extract the cleaning liquid when it is turned on. The heating component is arranged, the temperature sensor is used to detect the temperature of the heating component, and the spray pipe is connected with the heating component.

As shown in Figure 5, the control method of the cleaning device of the range hood according to the embodiment of the present invention includes the following steps:

S1, control the heating component to heat when the range hood starts the cleaning program.

S2, after the temperature of the heating component reaches the first preset temperature for the first time, control the water pump to be turned on for the first preset time and turned off for the second preset time in each cleaning cycle, wherein, when the water pump is turned on, the cleaning liquid is pumped to The heating component is heated to generate a high-temperature and high-pressure water-steam mixture, and the water-steam mixture is sprayed out from the nozzle to clean the range hood.

In one embodiment of the present invention, the heating assembly includes a liquid storage chamber and a heating element corresponding to the liquid storage chamber, the inlet of the liquid storage chamber is connected to the water pump, and the outlet of the liquid storage chamber is connected to the spray pipe.

Specifically, when the range hood starts the cleaning procedure, the heating element may be powered to control the heating element to be turned on and heat the liquid storage chamber. As shown in Figure 4, the heating element is kept on throughout the cleaning program.

A temperature sensor detects the temperature of the heating element or reservoir. As shown in Figure 4, after the heating element is turned on, the temperature of the heating assembly detected by the temperature sensor continues to rise. When the temperature of the heating assembly reaches the first preset temperature, that is, the temperature point t, the water pump can be powered for the first time. Control the water pump to turn on to draw the cleaning fluid and pump it into the fluid storage chamber. Since the temperature of the heating component reaches the first preset temperature, that is, the temperature of the liquid storage chamber is relatively high, when the cleaning liquid is pumped into the liquid storage chamber, it can be instantly vaporized and expanded to generate high-pressure steam and high-temperature liquid cleaning liquid, namely water vapor mixture. As shown in Figure 2, the nozzle includes a plurality of nozzle holes, and the high-pressure steam and high-temperature liquid cleaning liquid can be sprayed to the position to be cleaned in the range hood through the plurality of nozzle holes under the push of high pressure. The heat carried by the high-temperature liquid cleaning liquid can reduce the heat loss of the steam during the spraying process, and the impact force of the steam, that is, the cleaning pressure is relatively high, so that the range hood can be effectively cleaned by the water-steam mixture. As shown in FIG. 4 , the cleaning pressure, that is, the pressure of the liquid storage chamber can increase with the instantaneous heating of the cleaning liquid, and decrease with the spraying of the water vapor mixture. Wherein, the first preset temperature is the temperature at which the cleaning liquid can be vaporized and expanded instantaneously when it is pumped into the liquid storage chamber to generate high-pressure steam and high-temperature liquid cleaning liquid. In a specific embodiment of the utility model, the first The preset temperature is 120-160°C.

It should be understood that as the cleaning liquid continues to enter, the temperature of the liquid storage chamber may decrease as the cleaning liquid absorbs heat. That is, as shown in FIG. 4, after the water pump is turned on for a period of time, the temperature of the heating component may show a downward trend. When the temperature of the heating element is low, the cleaning pressure may be difficult to meet the cleaning requirements. Therefore, in the embodiment of the present invention, when the on-time of the water pump reaches the first preset time T1, the water pump can be controlled to be turned off, so that the temperature of the heating component rises again. After maintaining the closed state of the water pump for the second preset time T2, the water pump can be controlled to turn on again, so as to increase the cleaning pressure again to spray high-pressure steam and high-temperature liquid cleaning liquid to the position in the range hood that needs to be cleaned, so as to realize the Range hood cleaning.

Further, as shown in FIG. 4 , the time period T from when the temperature of the heating component reaches the first preset temperature for the first time to the end of the cleaning program may include multiple cleaning cycles, and each cleaning cycle may be divided into a first preset time T1 and the second preset time T2, and control the water pump to turn on during the first preset time T1, and control the water pump to turn off during the second preset time T2. That is to say, the above-mentioned process of controlling the water pump to be turned on for the first preset time T1 and turned off for the second preset time T2 may be executed cyclically, so as to realize the pulse cleaning of the range hood. In a specific embodiment of the present invention, the first preset time is 1-3 s, the second preset time is 3-8 s, and the duration of the cleaning program is 4-12 min. The whole cleaning procedure may include 20-160 cleaning cycles, that is, 20-160 pulse cleanings may be performed in the whole cleaning procedure.

In other embodiments of the present invention, it is also possible to control the water pump to turn on whenever the temperature of the heating component reaches the first preset temperature, and to control the water pump to turn off when the turn-on time of the water pump reaches the first preset time. In this way, there is no need to time the second preset time, and the cleaning cycle can be determined according to the temperature of the heating component and the first preset time.

According to the control method of the cleaning device of the range hood in the embodiment of the present invention, the heating component is controlled to heat when the range hood starts the cleaning program, and after the temperature of the heating component reaches the first preset temperature for the first time, after each cleaning Control the water pump to turn on the first preset time and turn off the second preset time in the cycle, wherein, when the water pump is turned on, the cleaning liquid is pumped into the heating component for heating to generate a high-temperature and high-pressure water-steam mixture, and the water-steam mixture is sprayed out from the nozzle In order to clean the range hood, not only the cleaning pressure is high, but also the cleaning temperature is high and the attenuation is slow, so that the cleaning effect of the range hood can be greatly improved.

Corresponding to the above-mentioned embodiments, the present invention also proposes a non-transitory computer-readable storage medium.

The non-transitory computer-readable storage medium of the embodiment of the present invention has a computer program stored thereon, wherein, when the program is executed by the processor, the control of the cleaning device of the range hood proposed by the above-mentioned embodiments of the present invention can be realized method.

According to the non-transitory computer-readable storage medium of the embodiment of the present invention, by executing the stored computer program, the cleaning effect of the range hood can be greatly improved.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial ", "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying No device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integration; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limitations of the present invention, and those skilled in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (7)

1. a kind of cleaning device of range hood, which is characterized in that including：

Water pump, the water pump are used to extract cleaning solution when opening；

Heating component, the heating component are connected with the water pump；

Temperature sensor, the temperature sensor correspond to the heating component and set, and the temperature sensor is described for detecting The temperature of heating component；

Jet pipe, the jet pipe are connected with the heating component；

Control module, the control module is connected respectively with the water pump, the heating component and the temperature sensor, described Control module controls the heating component to be heated when range hood starts cleaning procedure, and in the temperature of the heating component After degree reaches the first preset temperature for the first time, the water pump is controlled to open the first preset time within each cleaning frequency and closes the Two preset times, wherein, when the water pump is opened, the cleaning solution, which is pumped down in the heating component, to be heated to generate The gas-vapor mix of high temperature and pressure, the gas-vapor mix are sprayed to clean the range hood by the jet pipe.

2. the cleaning device of range hood according to claim 1, which is characterized in that the heating component includes liquid storage cylinder The heating element that liquid storage cylinder described with correspondence is set, the entrance of the liquid storage cylinder are connected with the water pump, and the liquid storage cylinder goes out Mouth is connected with the jet pipe.

3. the cleaning device of range hood according to claim 2, which is characterized in that the control module includes：

Timer, the timer are used for first preset time, second preset time and the cleaning procedure Duration carries out timing；

Power supply unit, the power supply unit are connected respectively with the heating element and the water pump, wherein, the power supply unit leads to It crosses and powers for the heating element, the heating element to be controlled to open heating, and by powering for the water pump or stopping supplying Electricity, the water pump to be controlled to be turned on and off.

4. the cleaning device of range hood according to claim 3, which is characterized in that further include：

Relief valve, the relief valve are arranged between the entrance of the water pump and the liquid storage cylinder, so as in the liquid storage cylinder Pressure be more than pressure threshold when open pressure release.

5. the cleaning device of the range hood according to any one of claim 1-4, which is characterized in that described first is default Temperature is 120~160 DEG C.

6. the cleaning device of range hood according to claim 5, which is characterized in that first preset time for 1~ 3s, second preset time are 3~8s, and the duration of the cleaning procedure is 4~12min.

7. a kind of range hood, which is characterized in that include the cleaning of the range hood according to any one of claim 1-6 Device.