CN114433373A - Spray pipe structure, range hood and cleaning method - Google Patents

Abstract

The invention discloses a spray pipe structure, a range hood and a cleaning method. Above-mentioned spray tube structure, behind the fluid entering circulation passageway, the first jet orifice of accessible spouts, if impurity such as incrustation scale appears in the circulation passageway when stifled in first jet orifice department, can lead to the pressure increase in the circulation passageway, elastic deformation can take place for the pressurized elastic component this moment, make the aperture increase of first jet orifice, make impurity such as incrustation scale can be discharged, prevent to block up, because the aperture of first jet orifice can increase, consequently, can be with the aperture setting of first jet orifice littleer, with the requirement of satisfying the injection force, also difficult impurity such as incrustation scale blocks up simultaneously, can provide better cleaning performance.

Description

Spray pipe structure, range hood and cleaning method

Technical Field

The invention relates to the technical field of household appliances, in particular to a spray pipe structure, a range hood and a cleaning method.

Background

Chinese style culinary art easily causes the oil smoke, can lead to smog too much in the indoor air, influence indoor environment and personnel health, range hood can effectively take away interior oil smoke of kitchen, but the oil smoke adheres to and can form the greasy dirt in range hood inside, influence equipment life-span and oil absorption cigarette effect, difficult washing, the cigarette machine that has appeared in recent years takes cleaning function, mainly spray on the adnexed spare part of easy production greasy dirt in range hood through steam and/or fluid after the heating, like spiral case, impeller etc. to reach the effect of cleaing away the greasy dirt. The fluids currently used on steam range hoods are usually tap fluids, and few consumers use pure fluids for cost reasons. In addition, the current range hood hardly carries out purification treatment on the tap fluid before entering the steam generator, or only carries out ordinary filtration, so that a large amount of scale can be generated after impurities in the tap fluid are heated. The nozzles used for spraying need to have a certain spraying force, which results in the openings in the nozzles being easily clogged by the scale coming out of the steam generator, so that the fluid and/or steam cannot come out and the cleaning effect is affected.

Disclosure of Invention

Based on the above, the invention provides a spray pipe structure which is not easy to be blocked, a range hood and a cleaning method, aiming at overcoming the problem that the spray pipe in the existing equipment is easy to be blocked.

The technical scheme is as follows:

the utility model provides a spray tube structure, includes the main part, be equipped with the circulation passageway in the main part, be equipped with the elasticity portion in the main part, be equipped with first jet orifice in the elasticity portion, first jet orifice with circulation passageway intercommunication, the elasticity portion is configured to work as take place elastic deformation when the pressure increase in the circulation passageway, make the aperture increase of first jet orifice.

Above-mentioned spray tube structure, behind the fluid entering circulation passageway, the first jet orifice of accessible spouts, if impurity such as incrustation scale appears in the circulation passageway when stifled in first jet orifice department, can lead to the pressure increase in the circulation passageway, elastic deformation can take place for the pressurized elastic component this moment, make the aperture increase of first jet orifice, make impurity such as incrustation scale can be discharged, prevent to block up, because the aperture of first jet orifice can increase, consequently, can be with the aperture setting of first jet orifice littleer, with the requirement of satisfying the injection force, also difficult impurity such as incrustation scale blocks up simultaneously, can provide better cleaning performance.

In one embodiment, the main body includes a nozzle and a sleeve, the lumen of the nozzle is the flow channel, the nozzle is provided with a second injection hole, the second injection hole is communicated with the flow channel, the sleeve is sleeved outside the nozzle, at least part of the sleeve is the elastic part, the first injection hole is arranged corresponding to the second injection hole, the first injection hole is communicated with the flow channel through the second injection hole, and the aperture of the second injection hole is larger than that of the first injection hole.

In one embodiment, the nozzle structure further includes a plug, the openings at two ends of the nozzle are respectively a liquid inlet opening and a blocking opening, and the plug is detachably connected to the nozzle to open or close the blocking opening.

In one embodiment, one end of the plug is an assembling end:

the assembling end is used for extending into the plugging opening, and is in threaded fit with the inner wall of the plugging opening;

or the assembly end is sleeved outside the spray pipe, so that the plug is covered with the plug opening, and the inner wall of the assembly end is in threaded fit with the spray pipe.

In one embodiment, the first injection hole is plural.

In one embodiment, a pressure sensor is arranged in the flow passage, and the pressure sensor is configured to output a descaling signal when the pressure measured by the pressure sensor is greater than a preset pressure.

In one embodiment, the nozzle structure further comprises an input tube communicating with the flow channel, and a heating element for heating the fluid entering the input tube.

In one embodiment, the input tube is removably connected to the body.

A range hood comprises a shell and the spray pipe structure, wherein the main body is arranged in the shell.

Above-mentioned range hood, behind the fluid entering circulation passageway, the first jet orifice of accessible blowout, be used for washing the casing is inside, if impurity such as incrustation scale appears in the circulation passageway when stifled in first jet orifice department, can lead to the pressure increase in the circulation passageway, elastic deformation can take place for the pressurized of elasticity portion this moment, make the aperture increase of first jet orifice, make impurity such as incrustation scale can be discharged, prevent to block up, because the aperture of first jet orifice can increase, consequently, can be with the aperture setting of first jet orifice littleer, with the requirement of satisfying the injection force, simultaneously also difficult impurity such as incrustation scale blocks up, can provide better cleaning performance.

In one embodiment, a volute is arranged in the housing, a centrifugal fan is arranged in the volute, an air inlet is formed in the volute, one end of the main body is a cleaning end, the elastic part is arranged on the cleaning end, and the cleaning end extends into the air inlet.

In one embodiment, the body is removably connected to the volute.

A method of cleaning using a nozzle arrangement as claimed in any preceding claim, comprising the steps of:

acquiring a pressure value in the flow channel;

and outputting a descaling signal when the pressure value is greater than the preset pressure.

Above-mentioned cleaning method, after the fluid got into the circulation passageway, the first jet orifice of accessible blowout for wash the casing inside, if impurity such as incrustation scale appears in the circulation passageway when stifled in first jet orifice department, can lead to the pressure increase in the circulation passageway, elastic deformation can take place for the pressurized of elasticity portion this moment, make the aperture increase of first jet orifice, make impurity such as incrustation scale can be discharged, prevent to block up, and when pressure in the circulation passageway is greater than when predetermineeing pressure, explain that the incrustation scale in the circulation passageway can't be discharged smoothly, output scale removal signal this moment, so that keep the unobstructed of circulation passageway, guarantee clean effect.

In one embodiment, the outputting a descaling signal when the pressure value is greater than a preset pressure further includes:

when the pressure value is larger than the preset pressure, timing is started and duration time is obtained;

and outputting a descaling signal when the duration is greater than the preset time.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and are not intended to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a range hood according to an embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of a body according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a main body according to an embodiment of the present invention;

FIG. 4 is an exploded view of a body according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating an assembly of the volute and the main body according to the embodiment of the present invention.

Description of reference numerals:

100. a main body; 101. a flow-through channel; 102. a first injection hole; 103. cleaning the end; 110. a nozzle; 111. a second injection hole; 112. opening a liquid inlet; 113. plugging the opening; 120. a sleeve; 200. a plug; 210. an assembly end; 300. a seal ring; 400. a pressure sensor; 500. a housing; 510. a volute; 511. and an air inlet.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1 to 3, an embodiment discloses a nozzle structure, which includes a main body 100, a flow passage 101 is provided in the main body 100, an elastic portion is provided on the main body 100, a first injection hole 102 is provided on the elastic portion, the first injection hole 102 is communicated with the flow passage 101, and the elastic portion is configured to be elastically deformed when a pressure in the flow passage 101 increases, so that a hole diameter of the first injection hole 102 increases.

Above-mentioned spray tube structure, behind the fluid entering circulation passageway 101, the first jet orifice 102 blowout of accessible, if impurity such as incrustation scale appears in circulation passageway 101 when stifled in first jet orifice 102 department, can lead to the pressure increase in circulation passageway 101, elastic deformation can take place for the elasticity portion pressurized this moment, make the aperture increase of first jet orifice 102, make impurity such as incrustation scale can be discharged, prevent to block up, because the aperture of first jet orifice 102 can increase, consequently, can be with the aperture setting of first jet orifice 102 littleer, with the requirement that satisfies the injection force, simultaneously also difficult impurity such as incrustation scale blocks up, can provide better cleaning performance.

The fluid may be water, steam, a gas-liquid mixture, or other substances that can be used for cleaning. Optionally, the water is high temperature hot water. The cleaning effect can be improved.

However, the pressure is not enough to push impurities such as scale out of the first injection hole 102, which may further increase the pressure in the flow channel 101, the aperture of the first injection hole 102 may be continuously enlarged until the impurities such as scale are discharged from the first injection hole 102, and then the pressure may return to normal, the elastic portion may rebound, and the aperture of the first injection hole 102 may be reduced.

In one embodiment, as shown in fig. 2 to 4, the main body 100 includes a nozzle 110 and a sleeve 120, a lumen of the nozzle 110 is the flow channel 101, the nozzle 110 is provided with a second injection hole 111, the second injection hole 111 is communicated with the flow channel 101, the sleeve 120 is sleeved outside the nozzle 110, at least a portion of the sleeve 120 is an elastic portion, the first injection hole 102 and the second injection hole 111 are correspondingly arranged, the first injection hole 102 is communicated with the flow channel 101 through the second injection hole 111, and an aperture of the second injection hole 111 is larger than an aperture of the first injection hole 102. Through at spray tube 110 overcoat sleeve pipe 120, and the aperture of the first jet orifice 102 on the sleeve pipe 120 is less than the aperture of second jet orifice 111, then second jet orifice 111 on the spray tube 110 can set up to bigger aperture, so that the great incrustation scale of size passes through, it directly blocks up in spray tube 110 to reduce incrustation scale, when the incrustation scale that passes through second jet orifice 111 blocks up in first jet orifice 102 department, the increase of pressure can make elastic deformation take place for the elastic part, and then the aperture of first jet orifice 102 can increase, make pressure can extrude first jet orifice 102 with the incrustation scale, difficult emergence is blockked up. In addition, the nozzle 110 is sleeved with the sleeve 120, so that the assembly is simpler and the manufacturing cost is lower.

Alternatively, the sleeve 120 may be entirely of an elastomeric material; or the sleeve 120 is an elastic portion, which is disposed corresponding to the second injection hole 111, so that the first injection hole 102 can be disposed corresponding to the second injection hole 111.

Optionally, the elastic part is made of a silica gel material. The elastic high-temperature-resistant anti-blocking rubber has elasticity, can resist high temperature, and can meet the requirements of outputting high-temperature fluid and preventing blocking. Specifically, the sleeve 120 is a silicone tube. In other embodiments, the elastic portion may be made of other elastic materials capable of resisting high temperature.

Alternatively, the sleeve 120 may be made of a metal tube or a rigid plastic tube, which has better guiding effect and can bear higher pressure, so that the fluid has a faster initial speed when being sprayed out, thereby improving the cleaning effect.

Optionally, the nozzle structure further includes at least two fastening members, the fastening members are sleeved outside the sleeve 120 and tighten the sleeve 120, so that the sleeve 120 is tightly attached to the nozzle 110, wherein the two fastening members are respectively located at two ends of the sleeve 120, and the fluid in the flow channel 101 can be prevented from flowing out between the sleeve 120 and the nozzle 110, which may affect the cleaning effect.

In other embodiments, the main body 100 is a pipe, and the portion of the main body 100 surrounding the first injection hole 102 is an elastic portion, and the rest is a hard material. At this time, when the first injection hole 102 is blocked and the pressure in the flow channel 101 increases, the elastic portion is also elastically deformed by a force to expand the first injection hole 102.

In one embodiment, as shown in fig. 2 to 4, the nozzle structure further includes a plug 200, the openings at two ends of the nozzle 110 are the liquid inlet opening 112 and the blocking opening 113, respectively, and the plug 200 is detachably connected to the nozzle 110, so that the plug 200 opens or closes the blocking opening 113. When the plug 200 is connected with the spray pipe 110, the plug 200 can plug the plugging opening 113, fluid can enter the spray pipe 110 from the liquid inlet opening 112, if the scale in the spray pipe 110 is more, the plug 200 can be separated from the spray pipe 110, and the scale removal operation can be conveniently carried out through the plugging opening 113.

In one embodiment, as shown in fig. 2-4, one end of the plug 200 is a mounting end 210:

the assembling end 210 is used for extending into the blocking opening 113, and the assembling end 210 is in threaded fit with the inner wall of the blocking opening 113;

or the assembling end 210 is sleeved outside the nozzle 110, so that the plug 200 covers the blocking opening 113, and the inner wall of the assembling end 210 is in threaded fit with the nozzle 110. At this time, the plug 200 can be detachably connected to the nozzle 110 by screw-fitting, and is easy to assemble and disassemble, and has a good anti-leakage effect.

Optionally, as shown in fig. 2 to 4, the nozzle structure further includes a sealing ring 300, and when the plug 200 is connected to the nozzle 110, the sealing ring 300 is disposed between the mounting end 210 and the nozzle 110. The sealing ring 300 can further improve the sealing performance and prevent leakage.

Optionally, a tightening groove is formed on an end surface of the other end of the plug 200 away from the assembling end 210, so that the plug 200 can be conveniently rotated by inserting a tool into the tightening groove, and the operation is more convenient.

In other embodiments, the plug 200 and the nozzle 110 may also be assembled in other manners, for example, the plug 200 is a plate, the first end of the plug 200 is hinged to the nozzle 110, the second end of the plug 200 is connected to the nozzle 110 in a snap-fit or detachable manner, when the second end of the plug 200 is connected to the nozzle 110 in a snap-fit or detachable manner, the plug 200 covers the blocking opening 113, and at this time, the opening or closing of the blocking opening 113 may also be achieved.

In one embodiment, as shown in fig. 2 to 4, the first injection hole 102 is plural. At this time, multiple strands of fluid can be sprayed, so that the cleaning area is increased, and the cleaning effect is improved.

Alternatively, one or at least two of the first injection holes 102 form one injection group, and all of the first injection holes 102 form a plurality of injection groups, with different injection groups being arranged at intervals along the length direction of the body 100. Specifically, when the number of the first injection holes 102 in one injection group is at least two, the first injection holes 102 in one injection group are arranged at intervals in the circumferential direction of the main body 100. The spraying area can be increased, and the cleaning effect is improved.

In one embodiment, as shown in fig. 2, a pressure sensor 400 is disposed in the flow channel 101, and the pressure sensor 400 is configured to output a descaling signal when the pressure measured by the pressure sensor 400 is greater than a preset pressure. When the pressure measured by the pressure sensor 400 is greater than the preset pressure, it indicates that the inside of the flow channel 101 is blocked by impurities such as scale and cannot be discharged through the first spraying hole 102, and therefore, a descaling signal is output so as to clean the inside of the flow channel 101 in time.

Alternatively, as shown in fig. 2, the pressure sensor 400 is disposed opposite to the first injection hole 102, and at this time, the pressure sensor 400 is closer to the first injection hole 102, so that the pressure in the flow channel 101 can be better determined, and a descaling signal can be timely output.

Optionally, as shown in fig. 2, the nozzle structure further includes an external circuit disposed outside the main body 100, and the pressure sensor 400 is electrically connected to the external circuit.

In one embodiment, the nozzle structure further comprises an input tube in communication with the flow channel 101 and a heating element for heating the fluid entering the input tube. By heating the fluid entering the inlet pipe, the fluid entering the flow channel 101 can be made to have a higher temperature, which can improve the cleaning effect. Meanwhile, the elastic part and the first injection hole 102 are utilized, so that scale generated in the process of heating water by the heating element can be discharged, the blockage is prevented, and the smooth proceeding of cleaning is ensured.

Alternatively, the heating member may be a steam generator, and water may be heated to steam or high-temperature hot water, which can improve the cleaning effect.

Optionally, the inlet pipe communicates with the inlet opening 112 of the spout 110.

In one embodiment, the input tube is removably coupled to the body 100. At this time, the main body 100 can be conveniently separated from the input pipe, and the main body 100 can be conveniently detached for descaling operation.

Optionally, the input tube is sleeved with the main body 100 and is in threaded fit or the input tube is in inserted fit with the main body 100, so that the lumen of the input tube is communicated with the flow channel 101.

As shown in fig. 1 to 4, an embodiment discloses a range hood, which includes a housing 500 and a nozzle structure according to any of the above embodiments, and a main body 100 is disposed in the housing 500.

Above-mentioned range hood, behind the fluid entering circulation passageway 101, the first jet orifice 102 of accessible spouts, be used for washing the casing 500 inside, if impurity such as incrustation scale appears in circulation passageway 101 blocks up when first jet orifice 102 department, can lead to the pressure increase in circulation passageway 101, elastic deformation can take place for the elastic part pressurized this moment, make the aperture increase of first jet orifice 102, make impurity such as incrustation scale can be discharged, prevent to appear blockking up, because the aperture of first jet orifice 102 can increase, consequently, can be littleer with the aperture setting of first jet orifice 102, with the requirement that satisfies the injection force, also difficult impurity such as incrustation scale of being blockked up simultaneously, can provide better cleaning performance.

Wherein, the housing 500 is a bellows component for sucking the oil smoke. Therefore, oil smoke is easily generated, and the inside of the case 500 can be cleaned by injecting the fluid into the case 500.

Alternatively, hot water, high-temperature steam, or a gas-liquid mixture may flow into the flow channel 101.

In one embodiment, as shown in fig. 1 and 5, a spiral casing 510 is disposed in the housing 500, a centrifugal fan is disposed in the spiral casing 510, an air inlet 511 is disposed on the spiral casing 510, one end of the main body 100 is the cleaning end 103, the elastic portion is disposed on the cleaning end 103, and the cleaning end 103 extends into the air inlet 511. By cleaning the first injection holes 102 on the end 103, the inside of the volute 510 or the centrifugal fan can be cleaned.

In one embodiment, the body 100 is removably coupled to the volute 510. At this time, when the main body 100 needs to be descaled, the main body 100 can be separated from the volute 510, so that the descale is facilitated.

An embodiment discloses a cleaning method, which applies the nozzle structure according to any one of the above embodiments, and comprises the following steps:

acquiring a pressure value in the flow channel 101;

and when the pressure value is greater than the preset pressure, outputting a descaling signal.

According to the cleaning method, after the fluid enters the circulation channel 101, the fluid can be sprayed out through the first spraying hole 102 and used for cleaning the interior of the shell 500, if impurities such as scale and the like are blocked at the first spraying hole 102 in the circulation channel 101, the pressure in the circulation channel 101 can be increased, the elastic part is pressed to be elastically deformed, the aperture of the first spraying hole 102 is increased, the impurities such as scale and the like can be discharged, the blockage is prevented, when the pressure in the circulation channel 101 is larger than the preset pressure, the scale in the circulation channel 101 cannot be smoothly discharged, and at the moment, a scale removal signal is output, so that the smoothness of the circulation channel 101 is maintained, and the cleaning effect is ensured.

In one embodiment, the outputting a descaling signal when the pressure value is greater than the preset pressure further includes:

when the pressure value is larger than the preset pressure, timing is started and the duration time is obtained;

and when the duration time is longer than the preset time, outputting a descaling signal.

When the incrustation scale is discharged from the first spraying hole 102, the pressure value in the circulation channel 101 can be increased, but the pressure value can be reduced along with the discharge of the incrustation scale, the duration time that the pressure value is greater than the preset pressure is short, the timing can be started when the pressure value is greater than the preset pressure, and when the duration time obtained by timing is greater than the preset time, the blockage caused by more impurities such as the incrustation scale in the circulation channel 101 can be confirmed, the incrustation scale cannot be discharged through the first spraying hole 102, and the descaling operation needs to be carried out, so that the interference can be eliminated through the arrangement, and whether the descaling is needed or not can be judged more accurately.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "flat," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may mean that the first feature is directly or diagonally above the second feature, or simply that the first feature is at a higher level than the second feature. A first feature "under," "below," and "beneath" a second feature may be directly or obliquely under the first feature or may simply mean that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "fluidly flat," "upper," "lower," "left," "right," and the like are for illustrative purposes only and do not represent the only embodiments.

Claims (13)

1. The utility model provides a spray tube structure, its characterized in that includes the main part, be equipped with the circulation passageway in the main part, be equipped with the elasticity portion in the main part, be equipped with first jet orifice in the elasticity portion, first jet orifice with circulation passageway intercommunication, the elasticity portion is configured to work as take place elastic deformation when the pressure increase in the circulation passageway makes the aperture increase of first jet orifice.

2. The nozzle structure of claim 1, wherein the main body includes a nozzle and a sleeve, the lumen of the nozzle is the flow channel, the nozzle is provided with a second injection hole, the second injection hole is communicated with the flow channel, the sleeve is sleeved outside the nozzle, at least a portion of the sleeve is the elastic portion, the first injection hole and the second injection hole are correspondingly disposed, the first injection hole is communicated with the flow channel through the second injection hole, and an aperture of the second injection hole is larger than an aperture of the first injection hole.

3. The nozzle structure of claim 2, further comprising a plug, wherein the openings at two ends of the nozzle are respectively a liquid inlet opening and a blocking opening, and the plug is detachably connected with the nozzle to open or close the blocking opening.

4. A spout assembly of claim 3 wherein one end of the plug is a fitting end:

the assembling end is used for extending into the plugging opening, and is in threaded fit with the inner wall of the plugging opening;

or the assembly end is sleeved outside the spray pipe, so that the plug is covered with the plug opening, and the inner wall of the assembly end is in threaded fit with the spray pipe.

5. The spout structure of claim 1 wherein the first spouting hole is plural.

6. The nozzle arrangement of claim 1, wherein a pressure sensor is disposed within the flow channel, the pressure sensor configured to output a descaling signal when a pressure measured by the pressure sensor is greater than a predetermined value.

7. A lance structure in accordance with any one of claims 1 to 6 further including an inlet pipe communicating with the flow passage and a heating element for heating fluid entering the inlet pipe.

8. The spout structure of claim 7 wherein the input tube is removably connected to the main body.

9. A range hood, comprising a housing and a nozzle structure as claimed in any one of claims 1 to 8, wherein the main body is disposed in the housing.

10. The range hood of claim 9, wherein a volute is disposed in the housing, a centrifugal fan is disposed in the volute, an air inlet is disposed on the volute, one end of the main body is a cleaning end, the elastic portion is disposed on the cleaning end, and the cleaning end extends into the air inlet.

11. The range hood of claim 10, wherein the main body is removably connected to the volute.

12. A cleaning method, characterized in that the use of a nozzle arrangement according to any of the claims 1-8, comprises the following steps:

acquiring a pressure value in the flow channel;

and outputting a descaling signal when the pressure value is greater than the preset pressure.

13. The cleaning method according to claim 12, wherein the step of outputting a descaling signal when the pressure value is greater than a predetermined pressure further comprises the steps of:

when the pressure value is larger than the preset pressure, timing is started and duration time is obtained;

and outputting a descaling signal when the duration is greater than the preset time.

Images