CN217464566U - range hood - 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

range hood

technical field

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

Background technique

At present, range hoods use the principle that the indoor oil fume is discharged to the outside through the work of the centrifugal fan. The adhesion of oil fume will also affect the smoking efficiency. The filtration of oil fume is mainly through the metal filter screen, because to ensure the fume exhaust efficiency, the smaller the system resistance, the better it is good.

The prior art discloses a vacuum chamber range hood, which includes a range hood main body, a low-pressure gas collecting tank connected with the range hood main body and arranged outdoors, the low-pressure gas collecting tank is connected with a vacuum pump, and the range hood main body is absorbed by the vacuum pump. The oil fume is sucked into the low-pressure gas collecting tank and discharged from the low-pressure gas collecting tank. The low-pressure gas collecting tank is connected to a plurality of smoke inlet pipelines, and each smoke inlet pipeline can be connected to the main body of the range hood. A filter device is arranged on the smoke inlet pipe.

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 art, both the low-pressure gas collecting tank and the vacuum pump are installed outdoors, which makes the smoke inlet pipeline too long, the smoke supply pipeline is easily blocked by oil fume, and the filter device provided in the smoke inlet pipeline is also easily blocked. As a result, it is difficult to clean and replace the smoke supply line and filter device.

Utility model content

In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended to be an extensive review, nor to identify key/critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

The embodiments of the present disclosure provide a range hood, so as to reduce the blockage of the filter device and the smoke supply pipeline, and facilitate the cleaning and replacement of the filter device and the smoke supply pipeline.

An embodiment of the present disclosure provides a range hood, the range hood includes: a casing defining a cavity with a first smoke inlet; a negative pressure tank located in the cavity, and an inlet of the negative pressure tank It is communicated with the first smoke inlet and is used for absorbing the smoke outside the shell; the vacuum pump is communicated with the negative pressure tank and is used for absorbing the smoke in the negative pressure tank to discharge the smoke air and adjust the pressure in the negative pressure tank; a filter device is arranged upstream of the vacuum pump to ensure the cleanliness of the flue gas flowing into the vacuum pump.

The range hood provided by the embodiments of the present disclosure can achieve the following technical effects:

The negative pressure tank is located in the cavity defined by the housing of the range hood, and the inlet of the negative pressure tank is communicated with the first smoke inlet. The distance between the inlet of the negative pressure tank and the first smoke inlet is made closer, so that the pipeline between the inlet of the negative pressure tank and the first smoke inlet can be omitted, or the length of the pipeline is set to be very short. Therefore, the clogging of the passage between the inlet of the negative pressure tank and the first smoke inlet can be reduced, and the cleaning and replacement of the pipeline are also facilitated. The filter device is located upstream of the vacuum pump, which can prevent impurities from entering the vacuum pump and ensure the normal operation of the vacuum pump. In addition, the oil fume is drawn away by the vacuum pump after passing through the negative pressure tank, and the negative pressure tank can also deposit a part of the oil fume, which further ensures the cleanliness of the fume entering the vacuum pump.

The foregoing general description and the following description are exemplary and explanatory only and are not intended to limit the application.

Description of drawings

One or more embodiments are exemplified by the accompanying drawings, which are not intended to limit the embodiments, and elements with the same reference numerals in the drawings are shown as similar elements, The drawings do not constitute a limitation of scale, and in which:

1 is a schematic diagram of the connection structure of a vacuum pump and a negative pressure tank provided by an embodiment of the present disclosure;

2 is a schematic structural diagram of a range hood provided by an embodiment of the present disclosure;

3 is a schematic diagram of the internal structure of a hood provided by an embodiment of the present disclosure;

4 is a schematic structural diagram of another hood provided by an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of the connection structure of another vacuum pump and a negative pressure tank provided by an embodiment of the present disclosure.

Reference number:

10. Shell; 101. The first smoke inlet; 102, the exhaust air duct; 103, the main exhaust chamber; 104, the second smoke inlet; 20, the negative pressure tank; 201, the inlet of the negative pressure tank; 202 , outlet of negative pressure tank; 30, vacuum pump; 40, connecting pipe; 50, intake valve; 60, exhaust valve; 70, fan; 80, filter device; 801, third detection device; 802, prompt device; 90 , cover.

Detailed ways

In order to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are for reference only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, numerous details are provided 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 simplified in order to simplify the drawings.

The terms "first", "second" and the like in the description and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances for the purposes of implementing the embodiments of the disclosure described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion.

In the embodiments of the present disclosure, the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. are based on the orientations shown in the drawings or Positional relationship. These terms are primarily used to better describe the embodiments of the present disclosure and embodiments thereof, and are not intended to limit the fact that the indicated device, element, or component must have a particular orientation, or be constructed and operated in a particular orientation. In addition, some of the above-mentioned terms may be used to express other meanings besides orientation or positional relationship. For example, the term "on" may also be used to express a certain attachment or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific situations.

In addition, the terms "arranged", "connected" and "fixed" should be construed broadly. For example, "connection" may be a fixed connection, a detachable connection, or a unitary construction; it may be a mechanical connection, or an electrical connection; it may be a direct connection, or an indirect connection through an intermediary, or two devices, elements or Internal connectivity between components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific situations.

Unless stated otherwise, the term "plurality" means two or more.

The term "and/or" is an associative relationship describing objects, indicating that three relationships can exist. For example, A and/or B, means: A or B, or, A and B three relationships.

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

With reference to FIGS. 1 to 5 , an embodiment of the present disclosure provides a hood. The range hood includes a housing 10 and a negative pressure tank 20 . The housing 10 is provided with a first smoke inlet 101 , and the inlet 201 of the negative pressure tank is connected to The first smoke inlet 101 is connected to each other, and the inlet 201 of the negative pressure tank is used for inhaling the smoke outside the casing 10 .

In this embodiment, the negative pressure tank 20 absorbs the smoke from the outside through the first smoke inlet 101 , so as to realize the absorption of the smoke by the negative pressure tank 20 .

Optionally, the inlet 201 of the negative pressure tank can be controlled to open or close, so that the inlet 201 of the negative pressure tank can absorb flue gas in a controllable manner, which is convenient for users to operate.

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

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

Optionally, the housing 10 defines a cavity, the cavity has a first smoke inlet 101, and the negative pressure tank 20 is located in the cavity.

In this embodiment, the negative pressure tank 20 is located in the cavity defined by the housing 10, so that the structure of the range hood is more compact, and the size of the range hood is not additionally increased. The inlet 201 of the negative pressure tank is communicated with the first smoke inlet 101, so that the negative pressure tank 20 can extract the smoke generated by the cooker.

Optionally, the negative pressure tank 20 can also be provided outside the cavity, for example, it can be hung outside the housing 10, or placed on the cooktop, or placed in the smoke exhaust duct.

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

The negative pressure tank 20 is placed outside the housing 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, and the suction of the negative pressure tank 20 can be adjusted. The size and shape are convenient for the setting of the negative pressure tank 20 and for the rear installation of the negative pressure tank 20 .

Optionally, the range hood also includes 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 to absorb the flue gas in the negative pressure tank 20 to discharge the flue gas and adjust 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 to say, along the flow direction of the air flow, the negative pressure tank 20 and the vacuum pump 30 are arranged in sequence, and the vacuum pump 30 can extract the flue gas in the negative pressure tank 20, In order to adjust the pressure of the negative pressure tank 20 , the negative pressure tank 20 can generate a pressure difference with the outside, so that the negative pressure tank 20 can extract the external flue gas.

Optionally, the vacuum pump 30 can controllably absorb the flue gas in the negative pressure tank 20, 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 absorbs the flue gas in the negative pressure tank 20 to form a negative pressure or vacuum in the negative pressure tank 20 .

With the range hood of this embodiment, when the inlet 201 of the negative pressure tank is closed, the vacuum pump 30 can extract the flue gas in the negative pressure tank 20, so that the negative pressure tank 20 is kept in a negative pressure or vacuum state. When the hood is turned on and needs to absorb 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 both connected to the outside world. The negative pressure tank 20 can quickly inhale a large amount of smoke by utilizing the pressure difference. It can be understood that the negative pressure tank 20 always keeps at least one end closed, so as to ensure that the negative pressure tank 20 can be kept in the negative pressure state repeatedly.

When the inlet 201 of the negative pressure tank is opened, since the negative pressure tank 20 forms a great negative pressure relative to the outside world, a large amount of smoke generated by the outside cooker can also quickly enter the negative pressure tank 20 . In this way, the attractive force of the negative pressure tank 20 is several times higher than that of a common range hood, which can greatly improve the range hood's ability to absorb oil fume and improve the smoking efficiency of the range hood. In addition, the vacuum pump 30 can repeatedly suck the flue gas in the negative pressure tank 20, so that the negative pressure tank 20 can be repeatedly in a state of vacuum or negative pressure. In this way, the range hood can continuously absorb the flue gas and improve the suction effect of the range hood.

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

In this embodiment, since the negative pressure tank 20 is located inside the housing 10 , the distance between the inlet 201 of the negative pressure tank and the first smoke inlet 101 is relatively short, that is to say, the inlet 201 of the negative pressure tank can be connected to the first smoke inlet 101 . The port 101 is integrally formed, and can also be connected by a pipeline, and the length of the pipeline is relatively short. In this way, the accumulation of oil fume between the inlet 201 of the negative pressure tank and the first smoke inlet 101 can be reduced, the pipeline is prevented from being blocked and difficult to clean due to too long, and the replacement of the pipeline is also facilitated. The filter device 80 is arranged upstream of the vacuum pump 30 , and can filter the flue gas flowing into the vacuum pump 30 to prevent oil fume particles from entering the vacuum pump 30 , thereby ensuring the normal operation of the vacuum pump 30 .

Optionally, the range hood also includes a connecting pipe 40, which is connected between the outlet 202 of the negative pressure tank and the inlet of the vacuum pump 30; the filter device 80 is provided at the inlet 201 of the negative pressure tank, the outlet 202 of the negative pressure tank, One or more locations within the connecting pipe 40 and in the inlet of the vacuum pump 30 .

In this embodiment, the filter device 80 is disposed at the inlet 201 of the negative pressure tank to filter the flue gas entering the negative pressure tank 20 , thereby preventing the soot particles from entering the vacuum pump 30 and reducing oil stains in the negative pressure tank 20 . When the filter device 80 is arranged at the outlet 202 of the negative pressure tank, the connecting pipe 40 and the inlet of the vacuum pump 30, it can filter the flue gas entering the vacuum pump 30, so as to prevent the flue gas flowing out of the negative pressure tank 20 from carrying oil fume particles from entering. The vacuum pump 30 causes the vacuum pump 30 to fail.

The filter devices 80 can also be provided at multiple locations above, which can filter the flue gas entering the vacuum pump 30 multiple times, thereby further ensuring the cleanliness of the flue gas from the flow chart vacuum pump 30 .

Optionally, when a pipeline is provided between the first smoke inlet 101 and the inlet 201 of the negative pressure tank, the filter device 80 can also be arranged in the pipeline to purify the flue gas 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 provided in the filter device 80 and is used to detect the clogging information of the filter device 80; the controller, the third detection device 801 and the vacuum pump 30 are both Electrically connected, the controller controls the vacuum pump 30 to work according to the clogging information of the filter device 80 .

In this embodiment, the controller can control the vacuum pump 30 to work automatically according to the blockage of the filter device 80, realize different negative pressure values in the negative pressure tank 20, ensure the filtering effect and maintain a sufficient purification air volume, and also prolong the filter device. 80 hours of use.

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

In this embodiment, the service life of the filter device 80 can be monitored by the above sensors, the control value of the pressure in the negative pressure tank 20 can be determined by the detection value of the sensor, and the service life of the filter screen can be improved by adjusting the pressure value in the negative pressure tank 20 .

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

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

For example, if the weight sensor can detect the weight of the filter device 80, the controller first determines whether the weight of the filter device 80 is greater than or equal to the first threshold, and if so, then determines whether the weight of the filter device 80 is greater than or equal to the second threshold; otherwise, the controller Control the vacuum pump 30 to work so that the pressure in the negative pressure tank 20 is greater than or equal to the first preset pressure, and the working time of the vacuum pump 30 is the first preset time, and control the prompting device 802 to work to show that the filtering device 80 is working normally, such as , the indicator light can be controlled to be green.

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

The controller then judges whether the weight of the filter device 80 is greater than or equal to the third threshold; if so, it controls the prompting device 802 to work to remind the user to replace or clean the filter device 80, for example, the indicator light can be controlled to be red; otherwise, the controller The vacuum pump 30 is controlled to work so that the pressure in the negative pressure tank 20 is greater than or equal to the third preset pressure, and the working time of the vacuum pump 30 is the third preset time.

Optionally, the filter device 80 is detachably provided upstream of the vacuum pump 30 .

In this embodiment, the filter device 80 is detachably arranged upstream of the vacuum pump 30 to facilitate maintenance, replacement and cleaning of the filter device 80 .

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

When the filter device 80 is provided at the outlet 202 of the negative pressure tank, the filter device 80 is detachably connected to the outlet 202 of the negative pressure tank.

When the filter device 80 is installed in the connection pipe 40 , the filter device 80 is detachably connected to the pipe wall of the connection pipe 40 .

When the filter device 80 is disposed at the inlet of the vacuum pump 30 , the filter device 80 and the vacuum pump 30 are detachably connected.

Optionally, the filter device 80 can be detachably connected by means of screws, snaps, magnets, and the like.

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

In this embodiment, multiple filtering devices 80 are arranged in sequence from the negative pressure tank 20 to the vacuum pump 30 , which can increase the filtering degree of the flue gas entering the vacuum pump 30 and ensure the cleanliness of the flue gas entering the vacuum pump 30 .

Optionally, the plurality of filtering devices 80 may be the same type of filtering devices 80 to increase the filtering of specific impurities and fully prevent the specific impurities from entering the vacuum pump 30 .

Optionally, the plurality of filter devices 80 may also be different types of filter devices 80 . In order to filter unused impurities, a variety of impurities can be prevented from entering the vacuum pump 30 .

Optionally, the filtering device 80 may adopt filtering devices 80 such as coarse-effect, medium-efficiency, high-efficiency filtering devices, and novel negative ion purification.

Optionally, the filter device 80 includes a high-efficiency filter device.

In this embodiment, because the pressure in the negative pressure tank 20 is far lower than the atmospheric pressure and the pressure difference is large, the strong system resistance can be overcome, and a high-efficiency filter device, such as a HEPA high-efficiency filter, can efficiently filter the impurities in the flue gas.

Optionally, the material of the filter device 80 includes ultra-fine glass fiber filter paper, the effective rate for 0.1 micron and 0.3 micron reaches 99.7%, which 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 can be designed in terms of shape and structure according to the selected specific material, so as to ensure that a small amount of deformation is maintained under a large pressure difference.

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

In this embodiment, the inlet valve 50 is manually or automatically controlled to control the opening and closing of the inlet 201 of the negative pressure tank and the outside world.

Since the inlet 201 of the negative pressure tank is communicated with the first smoke inlet 101, the intake valve 50 can also be arranged at the first smoke inlet 101, so that even if the inlet 201 of the negative pressure tank is inside the cavity, for example, the negative pressure In the case where the inlet 201 of the tank and the first smoke inlet 101 are communicated through a pipeline, it is also convenient to operate the intake valve 50, thereby facilitating the control of the opening and closing of the inlet 201 of the negative pressure tank.

Optionally, the inlet 201 of the negative pressure tank can be flush with the first smoke inlet 101 or slightly protrude to the outside of the first smoke inlet 101, so that the inlet 201 of the negative pressure tank and the first smoke inlet 101 can be saved. It is convenient to control the inflow of the airflow at the inlet 201 of the negative pressure tank.

When the intake valve 50 is opened, 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 intake valve 50 is closed, the inlet 201 of the negative pressure tank is closed , the vacuum pump 30 sucks the flue gas in the negative pressure tank 20 to discharge the flue gas and form a negative pressure or vacuum in the negative pressure tank 20 .

With the range hood of this embodiment, when the intake valve 50 is closed, the vacuum pump 30 can extract the flue gas in the negative pressure tank 20, so that the negative pressure tank 20 maintains a negative pressure or vacuum state. When the smoke machine is turned on and needs to absorb smoke, the intake valve 50 is opened, and the inlet 201 of the negative pressure tank and the first smoke inlet 101 are connected to the outside world. That is, the negative pressure tank 20 is always kept in a state where at least one end is closed.

When the intake valve 50 is opened, since the negative pressure tank 20 forms a great negative pressure relative to the outside, a large amount of smoke generated by the outside cooker can also quickly enter the negative pressure tank 20 . In this way, the attractive force of the negative pressure tank 20 is several times higher than that of a common range hood, which can greatly improve the range hood's ability to absorb oil fume and improve the smoking efficiency of the range hood. In addition, the vacuum pump 30 can repeatedly suck the flue gas in the negative pressure tank 20, so that the negative pressure tank 20 can be repeatedly in a state of vacuum or negative pressure. In this way, the range hood can continuously absorb the flue gas and improve the suction effect of the range hood.

Optionally, the range hood further includes an exhaust valve 60, and the exhaust valve 60 is provided 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 to control the negative pressure tank 20 and the vacuum pump. 30 on and off.

Using the range hood of this optional embodiment, the exhaust valve 60 is used to control the on-off of the negative pressure tank 20 and the vacuum pump 30 , and the exhaust valve 60 can be provided at any place between the connection between the negative pressure tank 20 and the vacuum pump 30 or In many places, the opening and closing of the outlet 202 of the negative pressure tank can be controlled so that when the intake valve 50 is opened, the outlet 202 of the negative pressure tank is closed to ensure the negative pressure or vacuum state in the negative pressure tank 20 .

Optionally, the range hood further includes a first detection device, and the first detection device is used to detect the smoke information generated by the cooker; the controller is electrically connected with the first detection device, the intake valve 50 and the vacuum pump 30, and the controller is configured as The opening and closing of the intake valve 50 and the operation of the vacuum pump 30 are controlled according to the smoke information generated by the cooker.

By adopting the range hood of this optional embodiment, the operation of the intake valve 50 and the vacuum pump 30 can be automatically controlled by the first detection device and the controller, the opening accuracy of the intake valve 50 and the vacuum pump 30 can be increased, and the suction of the negative pressure tank 20 can be improved. The convenience of flue gas simplifies the process of operation.

Optionally, the 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 information on the amount of smoke generated by the cooktop.

In this embodiment, the opening and closing of the exhaust valve 60 is also automatically controlled by the controller, which increases the opening accuracy of the exhaust valve 60 , improves the convenience for the suction tank 20 to absorb flue gas, and simplifies the operation process.

Optionally, the range hood further includes a second detection device, and the second detection device is arranged in the negative pressure tank 20 to detect the pressure of the negative pressure tank 20; the second detection device is electrically connected to the controller, and the controller is configured according to the The pressure in the negative pressure tank 20 controls the opening and closing of the exhaust valve 60 and the operation of the vacuum pump 30 .

In this optional embodiment, the second detection device 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 discharged even if The internal pressure keeps the negative pressure tank 20 in a negative pressure or vacuum state.

Optionally, as shown in FIG. 3 , the casing 10 further defines a smoke exhaust air duct 102 , the cavity includes a smoke exhaust air duct 102 , and the range hood further includes a fan 70 , the fan 70 is located in the casing 10 , and the fan 70 can be driven The flue gas flows in the exhaust air duct 102 so that the flue gas is discharged from the range hood; the outlet of the vacuum pump 30 is connected with the exhaust air duct 102, and the vacuum pump 30 can suck the flue gas in the negative pressure tank 20 to the exhaust air duct 102.

With the range hood of this optional embodiment, the smoke exhaust air duct 102 defined by the housing 10 is communicated with the smoke exhaust passage of the building, and can discharge the smoke drawn by the hood into the smoke exhaust passage. The vacuum pump 30 sucks the flue gas in the negative pressure tank 20 into the flue gas exhaust duct 102 , and flows out of the range hood through the drive of the fan 70 . The leakage of the flue gas can be avoided, and the flue gas in the negative pressure tank 20 can be properly handled.

It should be noted that the fan 70 is located in the casing 10, that is to say, the fan 70 is located in the cavity and can drive the flue gas flow in the cavity.

Optionally, as shown in FIG. 3 , the housing 10 is further provided with a second smoke inlet 104, and is provided with a main smoke exhaust cavity 103 respectively communicating with the second smoke inlet 104 and the smoke exhaust air duct 102, The main smoke exhaust chamber 103 communicates with the outside through the second smoke inlet 104 ; wherein, the fan 70 can drive the smoke to flow into the main smoke exhaust chamber 103 through the second smoke inlet 104 and then flow out through the smoke exhaust air duct 102 .

3, the thin arrows indicate the flow direction of the flue gas in the negative pressure tank 20 and the vacuum pump 30, the medium thick arrows indicate the flow direction of the air flow in the main exhaust chamber 103;

With this optional embodiment, the range hood can also exhaust smoke through the main exhaust cavity 103, and when the fan 70 is working in the cavity, it can drive the outside smoke to enter the main exhaust cavity 103 from the second smoke inlet 104 and be discharged to in the exhaust air duct 102 . That is to say, the range hood still retains the conventional smoke inlet (the second smoke inlet 104) and the smoke exhaust channel (the main smoke exhaust cavity 103 and the smoke exhaust air duct 102). The method of absorbing oil fume by the range hood is increased, the escape problem of oil fume is solved, and the effect of the range hood in absorbing oil fume is improved.

In the existing range hood, a large amount of oil fume is generated during the frying process of the cooker, and only relying on the conventional smoking device will cause the oil fume to escape. The main smoke exhaust chamber 103 absorbs smoke, which increases the range of smoking. In addition, when a large amount of oil fume is generated during frying, the negative pressure tank 20 can instantly absorb a large amount of fume to prevent the fume from escaping.

Compared with the method of increasing the rotational speed of the fan 70 or increasing the size of the fan 70 in the prior art, the range hood of the embodiment of the present disclosure can achieve the purpose of not running off smoke, and sucking the range fumes more cleanly without increasing the noise. Moreover, energy consumption can be reduced without additionally increasing the size of the range hood.

Optionally, when the negative pressure tank 20 is located in the housing 10 , the negative pressure tank 20 and the housing 10 together enclose the main smoke exhaust cavity 103 .

In this embodiment, the negative pressure tank 20 is located in the housing 10 . In order to prevent the negative pressure tank 20 from blocking the flow of flue gas in the main exhaust chamber 103 , the negative pressure tank 20 and the housing 10 jointly define the main exhaust chamber 103 . That is to say, on the basis of not changing the original structure of the range hood, a negative pressure tank 20 can be added in the housing 10, and there is a gap between the negative pressure tank 20 and the housing 10 (the main exhaust chamber 103) to ensure The flow of the flue gas in the main exhaust chamber 103 increases the working diversity of the range hood and ensures the absorption capacity of the range hood.

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

In this embodiment, the first smoke inlet 101 and the second smoke inlet 104 are both arranged on the wall of the smoke inlet cavity, which facilitates the absorption of smoke. Specifically, the wall of the smoke inlet cavity faces the cooker, which is convenient for absorbing smoke.

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

In this embodiment, the vacuum pump 30 is located outside the casing 10 , which facilitates maintenance of the vacuum pump 30 , saves space in the casing 10 , and facilitates the installation of the negative pressure tank 20 .

Optionally, as shown in FIG. 2 , the top of the housing 10 of the vacuum pump 30 , wherein the space at the top of the housing 10 is convenient for the placement of the vacuum pump 30 , and no additional space is needed to place the vacuum pump 30 .

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

In this embodiment, when there are multiple negative pressure tanks 20 , the outlets 202 of the multiple negative pressure tanks are all connected to one vacuum pump 30 , which can save the space occupied by the vacuum pump 30 and make the structure of the range hood more compact.

When the number of the negative pressure tank 20 is one, the capacity of the negative pressure tank 20 can be increased, or a plurality of partitions are arranged in the negative pressure tank 20, and each partition is connected with a vacuum pump 30, which can also save the space occupied by the vacuum pump 30. , making the structure of the range hood more compact.

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 arranged outside the casing 10 at intervals.

Optionally, the range hood further includes an outer cover 90, which is arranged outside the vacuum pump 30 and the connecting pipe 40, so as to increase the overall aesthetics of the hood. Moreover, the vacuum pump 30 and the connecting pipe 40 are prevented from being exposed to the outside, and the vacuum pump 30 and the connecting pipe 40 are protected.

Optionally, the negative pressure tank 20 is detachably located in the housing 10 .

In this embodiment, the negative pressure tank 20 is detachably located in the housing 10 to facilitate cleaning and replacement of the negative pressure tank 20 .

The foregoing description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples represent only possible variations. Unless expressly required, individual components and functions are optional and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. Embodiments of the present disclosure are not limited to the structures that have been described above and shown in the accompanying 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, is characterized in that, comprises: a housing (10) defining a cavity with a first smoke inlet (101); The negative pressure tank (20) is located in the cavity, and the inlet (201) of the negative pressure tank is communicated with the first smoke inlet (101), and is used for absorbing smoke from the outside of the casing (10). gas; A vacuum pump (30), communicated with the negative pressure tank (20), for absorbing the flue gas in the negative pressure tank (20), so as to discharge the flue gas and adjust the pressure in the negative pressure tank (20) ; A filtering device (80) is arranged upstream of the vacuum pump (30) to ensure the cleanliness of the flue gas flowing into the vacuum pump (30). 2. The range hood according to claim 1, characterized in that, further comprising: a connecting pipe (40), connected between the outlet (202) of the negative pressure tank and the inlet of the vacuum pump (30); The filtering device (80) is provided in the inlet (201) of the negative pressure tank, the outlet (202) of the negative pressure tank, in the connecting pipe (40) and in the inlet of the vacuum pump (30). at one location or at multiple locations. 3. The range hood according to claim 2, characterized in that, further comprising: A third detection device (801), provided in the filter device (80), is used to detect the clogging information of the filter device (80); a controller, electrically connected to both the third detection device (801) and the vacuum pump (30), the controller is configured to control the vacuum pump (30) to work according to the clogging information of the filter device (80) . 4. The range hood according to claim 3, characterized in that, The third detection device (801) includes one or more of a weight sensor, a timing sensor, a light transmission sensor and an air volume sensor. 5. The range hood according to claim 3, characterized in that, further comprising: A prompting device (802) is electrically connected to the controller, and the controller is configured to control the prompting device (802) to work according to the clogging information of the filtering device (80). 6. The range hood according to claim 1, characterized in that, The filtering device (80) is detachably arranged upstream of the vacuum pump (30). 7. The range hood according to claim 1, characterized in that, The number of the filter devices (80) is one or more, and when the number of the filter devices (80) is multiple, in the direction from the negative pressure tank (20) to the vacuum pump (30), the number of filter devices (80) is more than one. Each of the filtering devices (80) is arranged in sequence. 8. The range hood according to any one of claims 1 to 7, characterized in that, The filtering device (80) includes a high-efficiency filtering device (80). 9. The range hood according to any one of claims 3 to 5, characterized in that, further comprising: an air inlet valve (50), which is arranged at the inlet (201) of the negative pressure tank and/or the first smoke inlet (101), and is used to control the opening and closing of the inlet (201) of the negative pressure tank; Wherein, when the intake valve (50) 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; the intake air When the valve (50) is closed, the vacuum pump (30) is turned on, and the vacuum pump (30) absorbs the flue gas in the negative pressure tank (20), so that a negative pressure or a negative pressure is formed in the negative pressure tank (20). vacuum. 10. The range hood according to claim 9, characterized in that, further comprising: a first detection device, used for detecting the smoke information generated by the cooktop; The controller is electrically connected to the first detection device, the air intake valve (50) and the vacuum pump (30), and the controller is configured to control the air intake according to the smoke information generated by the cooker. The opening and closing of the air valve (50) and the operation of the vacuum pump (30).

Images