CN217464566U - Fume exhaust fan - Google Patents

Abstract

The application relates to the technical field of household appliances and discloses a range hood. The range hood includes: a housing defining a cavity having a first smoke inlet; the negative pressure tank is positioned in the cavity, and an inlet of the negative pressure tank is communicated with the first smoke inlet and is used for absorbing smoke; the vacuum pump is communicated with the negative pressure tank and is used for sucking the smoke in the negative pressure tank so as to discharge the smoke and adjust the pressure in the negative pressure tank; and the filtering device is arranged at the upstream of the vacuum pump so as to ensure the cleanliness of the flue gas flowing into the vacuum pump. The blockage of a passage between the inlet of the negative pressure tank and the first smoke inlet of the oil smoke can be reduced, and the cleaning and the replacement of the pipeline are facilitated.

Description

Fume exhaust fan

Technical Field

The application relates to the technical field of household appliances, for example to a range hood.

Background

At present, the lampblack absorber utilizes the principle of discharging indoor lampblack to the outdoor through the work of the centrifugal fan, lampblack adhesion also can influence the smoking efficiency, and the filtering aiming at the lampblack mainly passes through a metal filter screen, so that the smoke discharge efficiency is ensured, and the smaller the system resistance is, the better.

The prior art discloses a vacuum chamber range hood, which comprises a range hood main body and a low-pressure gas collection tank communicated with the range hood main body and arranged outdoors, wherein the low-pressure gas collection tank is connected with a vacuum pump, and oil smoke absorbed by the range hood main body is sucked into the low-pressure gas collection tank and is discharged out of the low-pressure gas collection tank through the vacuum pump. The low-pressure gas collection tank is connected with a plurality of smoke inlet pipelines, and each smoke inlet pipeline can be connected with the range hood main body. The smoke inlet pipeline is provided with a filtering device.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

in the related technology, the low-pressure gas collecting tank and the vacuum pump are both arranged outdoors, so that the smoke inlet pipeline is too long, the smoke delivery pipeline is easily blocked by oil smoke, and the filtering device arranged on the smoke inlet pipeline is also easily blocked. This results in the smoke line and filter being difficult to clean and replace.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a range hood, which can reduce the blockage of a filtering device and a smoke conveying pipeline and is convenient for cleaning and replacing the filtering device and the smoke conveying pipeline.

The embodiment of the present disclosure provides a range hood, the range hood includes: a housing defining a cavity having a first smoke inlet; the negative pressure tank is positioned in the cavity, and an inlet of the negative pressure tank is communicated with the first smoke inlet and is used for absorbing smoke outside the shell; the vacuum pump is communicated with the negative pressure tank and is used for sucking the smoke in the negative pressure tank so as to discharge the smoke and adjust the pressure in the negative pressure tank; and the filtering device is arranged at the upstream of the vacuum pump so as to ensure the cleanliness of the flue gas flowing into the vacuum pump.

The range hood provided by the embodiment of the disclosure can realize the following technical effects:

the negative pressure tank is positioned in a cavity limited by the shell of the range hood, and the inlet of the negative pressure tank is communicated with the first smoke inlet. The inlet of the negative pressure tank is close to the first smoke inlet, so that a pipeline between the inlet of the negative pressure tank and the first smoke inlet can be omitted, or the length of the arranged pipeline is short. And then can reduce the jam of the passageway between the entry of negative pressure jar and first inlet flue of oil smoke, the cleanness and the change of the pipeline of also being convenient for moreover. The filtering device is arranged at the upstream of the vacuum pump, so that impurities can be prevented from entering the vacuum pump, and the normal operation of the vacuum pump is ensured. In addition, the oil smoke is pumped away by the vacuum pump after passing through the negative pressure tank, and the negative pressure tank can also deposit a part of oil smoke, so that the cleanness of the smoke entering the vacuum pump is further ensured.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic view of a connection structure between a vacuum pump and a negative pressure tank provided in an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a range hood provided by the embodiment of the disclosure;

figure 3 is a schematic view of the internal structure of a cigarette making machine provided by embodiments of the present disclosure;

figure 4 is a schematic diagram of another cigarette machine provided by embodiments of the present disclosure;

fig. 5 is a schematic view of a connection structure of another vacuum pump and a negative pressure tank provided in the embodiment of the disclosure.

Reference numerals:

10. a housing; 101. a first smoke inlet; 102. a smoke exhaust duct; 103. a main smoke exhaust cavity; 104. a second smoke inlet; 20. a negative pressure tank; 201. an inlet of the negative pressure tank; 202. an outlet of the negative pressure tank; 30. a vacuum pump; 40. a connecting pipe; 50. an intake valve; 60. an exhaust valve; 70. a fan; 80. a filtration device; 801. a third detection device; 802. a prompting device; 90. a housing.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure may be understood as specific cases by those of ordinary skill in the art.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

Referring to fig. 1 to 5, the embodiment of the present disclosure provides a range hood, which includes a housing 10 and a negative pressure tank 20, the housing 10 is provided with a first smoke inlet 101, an inlet 201 of the negative pressure tank is communicated with the first smoke inlet 101, and the inlet 201 of the negative pressure tank is used for sucking smoke outside the housing 10.

In this embodiment, the negative pressure tank 20 sucks the external smoke through the first smoke inlet 101 to realize the absorption of the negative pressure tank 20 to the smoke.

Optionally, the inlet 201 of the negative pressure tank can be opened or closed in a controlled manner, so that the absorption of the smoke gas by the inlet 201 of the negative pressure tank is controllable, and the operation of a user is facilitated.

Optionally, at least one side of the housing 10 is provided with a first smoke inlet 101 to increase the absorption of smoke outside the housing 10 by the negative pressure tank 20.

Specifically, the casing 10 is provided with a first smoke inlet 101 towards the cooker or close to the side wall of the cooker, so that the first smoke inlet 101 sucks the smoke.

Optionally, the housing 10 defines a cavity having a first smoke inlet 101, and the negative pressure canister 20 is located within the cavity.

In this embodiment, negative pressure tank 20 is located the cavity that casing 10 was injectd for the structure of lampblack absorber is compacter, can not additionally increase the size of lampblack absorber. The inlet 201 of the negative pressure tank is communicated with the first smoke inlet 101, which is convenient for the negative pressure tank 20 to extract the smoke generated by the kitchen range.

Alternatively, the negative pressure tank 20 may be disposed outside the cavity, for example, hung outside the housing 10, or placed on the top of the kitchen range, or placed in the smoke exhaust duct.

Optionally, the height of the range hood is greater than that of the kitchen range, the negative pressure tank 20 is located in a cavity of the range hood, and smoke generated by the kitchen range moves upwards, so that the negative pressure tank 20 can absorb the smoke conveniently.

The negative pressure tank 20 is placed outside the casing 10, and the inlet 201 of the negative pressure tank is communicated with the first smoke inlet 101 through a pipeline, so that the smoking range of the negative pressure tank 20 can be ensured, the size and the shape of the negative pressure tank 20 can be adjusted, the arrangement of the negative pressure tank 20 is convenient, and the after-loading of the negative pressure tank 20 is convenient.

Optionally, the range hood further comprises a vacuum pump 30, the vacuum pump 30 is communicated with the outlet 202 of the negative pressure tank, and the vacuum pump 30 is used for sucking the smoke in the negative pressure tank 20 to exhaust the smoke and regulate the pressure in the negative pressure tank 20.

In this embodiment, the vacuum pump 30 is communicated with the outlet 202 of the negative pressure tank, that is, along the flowing direction of the air flow, the negative pressure tank 20 and the vacuum pump 30 are sequentially arranged, the vacuum pump 30 can extract the smoke in the negative pressure tank 20 to adjust the pressure of the negative pressure tank 20, so that the negative pressure tank 20 can generate a pressure difference with the outside, and the negative pressure tank 20 can conveniently extract the outside smoke.

Optionally, the vacuum pump 30 can be controlled to suck the smoke in the negative pressure tank 20, and when the inlet 201 of the negative pressure tank is opened, the vacuum pump 30 is disconnected from the negative pressure tank 20, so that the outlet 202 of the negative pressure tank is closed; when the inlet 201 of the negative pressure tank is closed, the vacuum pump 30 is turned on, and the vacuum pump 30 sucks the flue gas in the negative pressure tank 20, so that negative pressure or vacuum is formed in the negative pressure tank 20.

By adopting the range hood of the embodiment, when the inlet 201 of the negative pressure tank is closed, the vacuum pump 30 can extract the smoke in the negative pressure tank 20, so that the negative pressure tank 20 keeps a negative pressure or vacuum state. When the cigarette machine is opened and needs to suck smoke, the inlet 201 of the negative pressure tank is opened, and the inlet 201 of the negative pressure tank and the first smoke inlet 101 are communicated with the outside. The negative pressure tank 20 can rapidly suck a large amount of smoke using a pressure difference. It can be understood that: the negative pressure tank 20 is always kept in a state that at least one end is closed, so that the negative pressure tank 20 can be repeatedly kept in a negative pressure state.

When the inlet 201 of the negative pressure tank is opened, a large amount of smoke generated by an external cooker can also rapidly enter the negative pressure tank 20 because the negative pressure tank 20 forms a great negative pressure relative to the outside. Therefore, the suction force of the negative pressure tank 20 is increased by several times compared with that of a common range hood, the oil smoke suction capacity of the range hood can be greatly improved, and the smoke suction efficiency of the range hood is improved. In addition, the vacuum pump 30 can repeatedly suck the smoke in the negative pressure tank 20, so that the negative pressure tank 20 can be repeatedly in a vacuum or negative pressure state. Like this, the lampblack absorber can continuously absorb the flue gas, improves the absorption effect of oil smoke.

Optionally, as shown in fig. 5, the range hood further includes a filtering device 80, and the filtering device 80 is disposed upstream of the vacuum pump 30 to ensure cleanliness of the flue gas flowing into the vacuum pump 30.

In this embodiment, because the negative pressure tank 20 is located inside the housing 10, the inlet 201 of the negative pressure tank is closer to the first smoke inlet 101, that is, the inlet 201 of the negative pressure tank may be integrally formed with the first smoke inlet 101, and may also be connected by a pipe, and the length of the pipe is shorter. Therefore, the accumulation of oil smoke between the inlet 201 of the negative pressure tank and the first smoke inlet 101 can be reduced, the phenomenon that the pipeline is too long and blocked and is difficult to clean is avoided, and the pipeline is convenient to replace. The filtering device 80 is arranged at the upstream of the vacuum pump 30, and can filter the smoke flowing into the vacuum pump 30, so as to prevent the oil smoke particles from entering the vacuum pump 30 and further ensure the normal operation of the vacuum pump 30.

Optionally, the range hood further comprises a connecting pipe 40, the connecting pipe 40 is connected between the outlet 202 of the negative pressure tank and the inlet of the vacuum pump 30; the filtering means 80 is provided at one or more of an inlet 201 of the negative pressure tank, an outlet 202 of the negative pressure tank, the inside of the connection pipe 40, and an inlet of the vacuum pump 30.

In this embodiment, the inlet 201 of the negative pressure tank is arranged to the filter device 80, so that the flue gas entering the negative pressure tank 20 can be filtered, thereby avoiding the oil smoke particles entering the vacuum pump 30, and simultaneously reducing the oil stain in the negative pressure tank 20. When the outlet 202 of the negative pressure tank, the connecting pipe 40 and the inlet of the vacuum pump 30 are arranged on the filtering device 80, the smoke entering the vacuum pump 30 can be filtered, and the smoke flowing out of the negative pressure tank 20 is prevented from carrying oil smoke particles to enter the vacuum pump 30, so that the vacuum pump 30 is prevented from being disabled.

The filter devices 80 can also be arranged at a plurality of positions, so that the flue gas entering the vacuum pump 30 can be subjected to multiple filtration, and the cleanliness of the flue gas flowing into the vacuum pump 30 is further ensured.

Alternatively, in the case that a pipeline is provided between the first smoke inlet 101 and the inlet 201 of the negative pressure tank, the filtering device 80 may be provided in the pipeline to purify the smoke flowing into the negative pressure tank 20.

Optionally, the range hood further includes a third detection device 801 and a controller, the third detection device 801 is disposed on the filtering device 80, and is configured to detect blocking information of the filtering device 80; the controller is electrically connected with the third detection device 801 and the vacuum pump 30, and the controller controls the vacuum pump 30 to work according to the blockage information of the filtering device 80.

In this embodiment, the controller can control the vacuum pump 30 to automatically work according to the blockage condition of the filtering device 80, so as to realize different negative pressure values in the negative pressure tank 20, ensure the filtering effect, maintain the sufficient purified air volume, and prolong the service life of the filtering device 80.

Alternatively, the third detection device 801 includes one or more of a weight sensor, a timing sensor, a light quantity transmission sensor, and an air quantity sensor.

In this embodiment, the sensor can monitor the service life of the filtering device 80, and the control value of the pressure in the negative pressure tank 20 can be determined according to the detection value of the sensor, so that the service life of the filter screen can be prolonged by adjusting the pressure value in the negative pressure tank 20.

Optionally, the range hood further comprises a prompting device 802, the prompting device 802 is electrically connected with the controller, and the controller controls the prompting device 802 to work according to the blockage information of the filtering device 80.

In this embodiment, the prompt device 802 can prompt the user to replace or clean the filter screen device in time. Specifically, the prompting device 802 may be an indicator light or an alarm.

For example, the weight sensor can detect the weight of the filtering device 80, and the controller first determines that the weight of the filtering device 80 is greater than or equal to a first threshold, and if so, then determines whether the weight of the filtering device 80 is greater than or equal to a second threshold; otherwise, the controller controls the vacuum pump 30 to operate, so that the pressure in the negative pressure tank 20 is greater than or equal to the first preset pressure, and the operating time of the vacuum pump 30 is the first preset time, and controls the prompting device 802 to operate, so as to display that the filtering device 80 operates normally, for example, the indicator light may be controlled to be green.

The controller judges whether the weight of the filtering device 80 is greater than or equal to a second threshold value, and if so, the controller judges whether the weight of the filtering device 80 is greater than or equal to a third threshold value; otherwise, the controller controls the vacuum pump 30 to operate, so that the pressure in the negative pressure tank 20 is greater than or equal to a second preset pressure, and the operating time of the vacuum pump 30 is a second preset time.

The controller then determines whether the weight of the filter device 80 is greater than or equal to a third threshold; if yes, the control prompt device 802 is operated to prompt the user to replace or clean the filter device 80, for example, the indicator light may be controlled to be red; otherwise, the controller controls the vacuum pump 30 to operate, so that the pressure in the negative pressure tank 20 is greater than or equal to a third preset pressure, and the operating time of the vacuum pump 30 is a third preset time.

Optionally, the filter means 80 is removably provided upstream of the vacuum pump 30.

In this embodiment, the filter device 80 is detachably provided upstream of the vacuum pump 30, which facilitates maintenance, replacement, and cleaning of the filter device 80.

Specifically, when the filtering device 80 is disposed at the inlet 201 of the negative pressure tank, the filtering device 80 is detachably connected to the inlet 201 of the negative pressure tank.

When the filtering device 80 is arranged at the outlet 202 of the negative pressure tank, the filtering device 80 is detachably connected with the outlet 202 of the negative pressure tank.

When the filtering device 80 is disposed in the connecting pipe 40, the filtering device 80 is detachably connected to the wall of the connecting pipe 40.

When the filtering device 80 is provided at the inlet of the vacuum pump 30, the filtering device 80 is detachably connected to the vacuum pump 30.

Alternatively, the filter device 80 may be removably attached by screws, snaps, magnets, or the like.

Alternatively, the number of the filter devices 80 is one or more, and when the number of the filter devices 80 is plural, the plural filter devices 80 are sequentially arranged in a direction from the negative pressure tank 20 to the vacuum pump 30.

In this embodiment, the plurality of filtering devices 80 are sequentially arranged along the direction from the negative pressure tank 20 to the vacuum pump 30, so that the filtering degree of the flue gas entering the vacuum pump 30 can be increased, and the cleanliness of the flue gas entering the vacuum pump 30 is ensured.

Alternatively, the plurality of filtering devices 80 may be the same type of filtering device 80 to increase the filtering of a particular impurity substantially avoiding the particular impurity from entering the vacuum pump 30.

Alternatively, the plurality of filter devices 80 may be different types of filter devices 80. To filter out unused impurities and prevent various impurities from entering the vacuum pump 30.

Alternatively, the filtering device 80 may adopt a coarse-effect, medium-effect, high-effect filtering device and a novel filtering device 80 such as anion purification.

Optionally, the filter device 80 comprises a high efficiency filter device.

In this embodiment, because of negative pressure jar 20 internal pressure is less than atmospheric pressure far away, pressure differential is big, can overcome powerful system resistance, adopts high efficiency filter, like HEPA high efficiency filter, can filter the impurity in the flue gas high-efficiently.

Optionally, the material of the filtering device 80 includes a superfine glass fiber filter paper, the effective rate of 0.1 micron and 0.3 micron reaches 99.7%, and the filter has the advantages of large dust holding capacity, high filtering precision and low price.

It should be noted that: the interior of the filter device 80 may be designed to correspond in shape and structure to the specific material selected to ensure that a small amount of deformation is maintained under high pressure differential.

Optionally, as shown in fig. 1, the range hood further includes an air intake valve 50, and the air intake valve 50 is disposed at the inlet 201 of the negative pressure tank and/or the first smoke inlet 101, and is used for controlling the opening and closing of the inlet 201 of the negative pressure tank.

In this embodiment, the air inlet valve 50 is manually or automatically controlled to control the connection and disconnection between the inlet 201 of the negative pressure tank and the outside, and the air inlet valve 50 may be disposed at the inlet 201 of the negative pressure tank, so as to control the opening and closing of the negative pressure tank 20.

Because the inlet 201 of the negative pressure tank is communicated with the first smoke inlet 101, the air inlet valve 50 can be arranged at the first smoke inlet 101, so that even if the inlet 201 of the negative pressure tank is arranged in the cavity, for example, the inlet 201 of the negative pressure tank is communicated with the first smoke inlet 101 through a pipeline, the air inlet valve 50 can be operated conveniently, and the on-off of the inlet 201 of the negative pressure tank can be controlled conveniently.

Alternatively, the inlet 201 of the negative pressure tank may be flush with the first smoke inlet 101 or slightly extend to the outside of the first smoke inlet 101, which may save the piping between the inlet 201 of the negative pressure tank and the first smoke inlet 101 and facilitate the control of the inflow of the airflow at the inlet 201 of the negative pressure tank.

When the air inlet valve 50 is opened, the inlet 201 of the negative pressure tank is opened, and the vacuum pump 30 is disconnected with the negative pressure tank 20, so that the outlet 202 of the negative pressure tank is closed; when the air inlet valve 50 is closed, the inlet 201 of the negative pressure tank is closed, and the vacuum pump 30 sucks the smoke in the negative pressure tank 20 to discharge the smoke and form negative pressure or vacuum in the negative pressure tank 20.

By adopting the range hood of the embodiment, when the air inlet valve 50 is closed, the vacuum pump 30 can extract smoke in the negative pressure tank 20, so that the negative pressure tank 20 keeps a negative pressure or vacuum state. When the cigarette machine is opened and smoke needs to be sucked, the air inlet valve 50 is opened, and the inlet 201 of the negative pressure tank and the first smoke inlet 101 are communicated with the outside. That is, the negative pressure tank 20 is always kept in a state in which at least one end is closed.

When the air inlet valve 50 is opened, a large amount of smoke generated by an external cooker can also rapidly enter the negative pressure tank 20 because the negative pressure tank 20 forms a great negative pressure relative to the outside. Therefore, the suction force of the negative pressure tank 20 is increased by several times compared with that of a common range hood, the oil smoke suction capacity of the range hood can be greatly improved, and the smoke suction efficiency of the range hood is improved. In addition, the vacuum pump 30 can repeatedly suck the smoke in the negative pressure tank 20, so that the negative pressure tank 20 can be repeatedly in a vacuum or negative pressure state. Like this, the lampblack absorber can continuously absorb the flue gas, improves the absorption effect of oil smoke.

Optionally, the range hood further comprises an exhaust valve 60, and the exhaust valve 60 is arranged in one or more of the outlet 202 of the negative pressure tank, the connecting pipe 40 and the inlet of the vacuum pump 30 and is used for controlling the connection and disconnection of the negative pressure tank 20 and the vacuum pump 30.

By adopting the range hood of the optional embodiment, the exhaust valve 60 is used for controlling the on-off of the negative pressure tank 20 and the vacuum pump 30, and the exhaust valve 60 can be arranged at any one or more positions between the connection of the negative pressure tank 20 and the vacuum pump 30, so that the opening and closing of the outlet 202 of the negative pressure tank can be controlled, when the air inlet valve 50 is opened, the outlet 202 of the negative pressure tank is closed, and the negative pressure or vacuum state in the negative pressure tank 20 is ensured.

Optionally, the range hood further comprises a first detection device, and the first detection device is used for detecting smoke information generated by the cooker; the controller is electrically connected with the first detection device, the air inlet valve 50 and the vacuum pump 30, and the controller is configured to control the opening and closing of the air inlet valve 50 and the operation of the vacuum pump 30 according to the smoke information generated by the cooker.

Adopt this lampblack absorber of optional embodiment, can automatic control admission valve 50 and vacuum pump 30's work through first detection device and controller, increase the accuracy that admission valve 50 and vacuum pump 30 opened, improve the convenience that negative pressure jar 20 absorbs the flue gas, simplified the process of operation.

Optionally, a controller is electrically connected to the exhaust valve 60, and the controller is configured to control the opening and closing of the exhaust valve 60 according to the smoke amount information generated by the cooker.

In this embodiment, the exhaust valve 60 is also opened and closed by automatic control of the controller, so that the opening accuracy of the exhaust valve 60 is increased, the convenience of sucking the flue gas by the negative pressure tank 20 is improved, and the operation process is simplified.

Optionally, the range hood further comprises a second detection device, the second detection device is arranged in the negative pressure tank 20 and is used for detecting the pressure of the negative pressure tank 20; the second detection means is electrically connected to a controller, and the controller is configured to control the opening and closing of the exhaust valve 60 and the operation of the vacuum pump 30 in accordance with the pressure in the negative pressure tank 20.

With this alternative embodiment, the second detection means is used to detect the pressure in the negative pressure tank 20, and the controller controls the operation of the exhaust valve 60 and the vacuum pump 30 according to the pressure in the negative pressure tank 20, so that the negative pressure tank 20 can be maintained in a negative pressure or vacuum state even if the pressure in the negative pressure tank 20 is exhausted.

Optionally, as shown in fig. 3, the housing 10 further defines a smoke exhaust duct 102, the cavity includes the smoke exhaust duct 102, the range hood further includes a fan 70, the fan 70 is located in the housing 10, and the fan 70 can drive smoke to flow in the smoke exhaust duct 102, so that the smoke is discharged out of the range hood; the outlet of the vacuum pump 30 is communicated with the smoke exhaust duct 102, and the vacuum pump 30 can suck the smoke in the negative pressure tank 20 into the smoke exhaust duct 102.

By adopting the range hood of the optional embodiment, the smoke exhaust duct 102 defined by the shell 10 is communicated with the smoke exhaust channel of a building, and smoke sucked by the range hood can be exhausted into the smoke exhaust channel. The vacuum pump 30 sucks the smoke in the negative pressure tank 20 into the smoke exhaust duct 102, and the smoke flows out of the range hood under the driving of the fan 70. Can avoid the leakage of the flue gas and can properly treat the flue gas in the negative pressure tank 20.

It should be noted that the fan 70 is located within the housing 10, that is, the fan 70 is located within the cavity and is capable of driving the flow of flue gas within the cavity.

Optionally, as shown in fig. 3, a second smoke inlet 104 is further provided in the housing 10, and a main smoke exhaust cavity 103 is provided, which is respectively communicated with the second smoke inlet 104 and the smoke exhaust duct 102, and the main smoke exhaust cavity 103 is communicated with the outside through the second smoke inlet 104; the fan 70 can drive the flue gas to flow into the main flue gas discharging cavity 103 through the second flue gas inlet 104 and then flow out through the flue gas discharging duct 102.

In fig. 3, thin arrows indicate the flow direction of the flue gas in the negative pressure tank 20 and the vacuum pump 30, and thick arrows indicate the flow direction of the air flow in the main flue gas exhaust chamber 103; the thick arrow indicates the direction of the mixed two air flows.

By adopting the optional embodiment, the range hood can also discharge smoke through the main smoke discharge cavity 103, and when the fan 70 works in the cavity, the fan can drive external smoke to enter the main smoke discharge cavity 103 from the second smoke inlet 104 and discharge the smoke into the smoke discharge air duct 102. That is, the range hood also retains a conventional smoke inlet (second smoke inlet 104) and a smoke exhaust passage (main smoke exhaust chamber 103 and smoke exhaust duct 102). The mode that the lampblack absorber absorbs the oil smoke is increased, the problem of escape of the oil smoke is solved, and the effect that the lampblack absorber absorbs the oil smoke is improved.

The existing range hood generates a large amount of oil smoke in the process of quick frying of a kitchen range, only depends on a conventional smoking device to cause the oil smoke to escape, and the range hood disclosed by the embodiment of the invention can absorb the smoke through the negative pressure tank 20 and can also absorb the smoke through the main smoke exhaust cavity 103, so that the smoking range is increased. In addition, when a large amount of oil smoke is generated during quick frying, the negative pressure tank 20 can instantly absorb a large amount of smoke, so that the smoke is prevented from escaping.

Compare and take the rotational speed that increases fan 70 among the prior art, perhaps increase the mode of fan 70's size, the lampblack absorber of the embodiment of the disclosure can reach and not increase the noise and can reach the purpose that does not run the cigarette, the oil absorption cigarette is cleaner, can reduce the energy consumption moreover, does not additionally increase the size of lampblack absorber.

Alternatively, in the case where the negative pressure canister 20 is located within the housing 10, the negative pressure canister 20 and the housing 10 together enclose the main smoking chamber 103.

In this embodiment, the negative pressure tank 20 is located in the housing 10, and in order to avoid the negative pressure tank 20 blocking the smoke flow of the main smoke discharge cavity 103, the negative pressure tank 20 and the housing 10 jointly define the main smoke discharge cavity 103. That is to say, can add negative pressure jar 20 in casing 10 on the basis that does not change the original structure of lampblack absorber, and negative pressure jar 20 and the internal clearance (main exhaust chamber 103) that exists of casing 10 to guarantee the flow of flue gas in main exhaust chamber 103, increased the variety of the work of lampblack absorber, guarantee the absorption capacity of lampblack absorber.

Optionally, the housing 10 includes a smoke outlet wall, and the first smoke inlet 101 and the second smoke inlet 104 are disposed on the smoke outlet wall.

In this embodiment, the first smoke inlet 101 and the second smoke inlet 104 are both disposed on the wall of the smoke inlet cavity, so as to facilitate the absorption of smoke. Specifically, the smoke inlet cavity wall faces the stove, so that smoke can be absorbed conveniently.

Optionally, the vacuum pump 30 is located outside the housing 10.

In this embodiment, the vacuum pump 30 is located outside the housing 10, so that the maintenance of the vacuum pump 30 is facilitated, and the space inside the housing 10 is saved, so as to facilitate the arrangement of the negative pressure tank 20.

Alternatively, as shown in fig. 2, the vacuum pump 30 is provided at the top of the housing 10, wherein the space at the top of the housing 10 facilitates the placement of the vacuum pump 30 without requiring an additional space to be left for the placement of the vacuum pump 30.

Alternatively, when the number of the negative pressure tanks 20 is one or more, and the number of the negative pressure tanks 20 is plural, the outlets 202 of the plural negative pressure tanks are all communicated with a vacuum pump 30.

In this embodiment, when the quantity of negative pressure jar 20 is a plurality of, the export 202 of a plurality of negative pressure jars all communicates with a vacuum pump 30, can save the space that vacuum pump 30 occupy for the structure of lampblack absorber is compacter.

When the quantity of negative pressure jar 20 is one, can increase the capacity of negative pressure jar 20, perhaps be equipped with a plurality of subregion in the negative pressure jar 20, each subregion all is connected with a vacuum pump 30, also can save the space that vacuum pump 30 occupy for the structure of lampblack absorber is compacter.

Specifically, the plurality of negative pressure tanks 20 are connected to the same vacuum pump 30 through a plurality of connection pipes 40, the plurality of connection pipes 40 are arranged in parallel, and the plurality of connection pipes 40 are spaced outside the casing 10.

Optionally, the range hood further includes an outer cover 90 disposed outside the vacuum pump 30 and the connection pipe 40 to increase the overall aesthetic appearance of the range hood. And the vacuum pump 30 and the connection pipe 40 are prevented from being exposed to the outside, and the vacuum pump 30 and the connection pipe 40 are protected.

Optionally, the negative pressure canister 20 is removably located within the housing 10.

In this embodiment, the negative pressure tank 20 is detachably disposed in the housing 10, so that the negative pressure tank 20 can be cleaned and replaced conveniently.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A range hood, comprising:

a housing (10) defining a cavity having a first smoke inlet (101);

the negative pressure tank (20) is positioned in the cavity, and an inlet (201) of the negative pressure tank is communicated with the first smoke inlet (101) and is used for absorbing smoke outside the shell (10);

the vacuum pump (30) is communicated with the negative pressure tank (20) and is used for sucking the smoke in the negative pressure tank (20) so as to discharge the smoke and adjust the pressure in the negative pressure tank (20);

and the filtering device (80) is arranged at the upstream of the vacuum pump (30) so as to ensure the cleanliness of the smoke flowing into the vacuum pump (30).

2. The range hood of claim 1, further comprising:

a connection pipe (40) connected between an outlet (202) of the negative pressure tank and an inlet of the vacuum pump (30);

the filtering means (80) is provided at one or more of an inlet (201) of the negative pressure tank, an outlet (202) of the negative pressure tank, inside the connecting pipe (40) and an inlet of the vacuum pump (30).

3. The range hood of claim 2, further comprising:

third detecting means (801) provided in the filtering means (80) for detecting clogging information of the filtering means (80);

a controller electrically connected to both the third detection device (801) and the vacuum pump (30), the controller being configured to control the operation of the vacuum pump (30) according to the clogging information of the filtering device (80).

4. A range hood according to claim 3,

the third detecting means (801) includes one or more of a weight sensor, a timing sensor, a light quantity transmission sensor, and an air quantity sensor.

5. A range hood as set forth in claim 3, further comprising:

a prompting device (802) electrically connected with the controller, wherein the controller is configured to control the prompting device (802) to work according to the blockage information of the filtering device (80).

6. A range hood according to claim 1,

the filtering device (80) is detachably arranged at the upstream of the vacuum pump (30).

7. A range hood according to claim 1,

the number of the filtering devices (80) is one or more, and when the number of the filtering devices (80) is more than one, the filtering devices (80) are arranged in sequence along the direction from the negative pressure tank (20) to the vacuum pump (30).

8. A range hood according to any of the claims 1 to 7,

the filtering device (80) comprises a high-efficiency filtering device (80).

9. A range hood as claimed in any one of claims 3 to 5, further comprising:

an air inlet valve (50) which is provided at the inlet (201) of the negative pressure tank and/or the first smoke inlet (101) and is used for controlling the opening and closing of the inlet (201) of the negative pressure tank;

wherein when the air inlet valve (50) is opened, the vacuum pump (30) is disconnected with the negative pressure tank (20) so as to seal an outlet (202) of the negative pressure tank; when the air inlet valve (50) is closed, the vacuum pump (30) is opened, and the vacuum pump (30) sucks smoke in the negative pressure tank (20) to form negative pressure or vacuum in the negative pressure tank (20).

10. The range hood of claim 9, further comprising:

the first detection device is used for detecting the smoke information generated by the cooker;

the controller is electrically connected with the first detection device, the air inlet valve (50) and the vacuum pump (30), and the controller is configured to control the opening and closing of the air inlet valve (50) and the operation of the vacuum pump (30) according to smoke information generated by the cooker.

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