Air curtain range hood

Abstract

The application discloses a kind of wind curtain range hood, including fan device for providing power to suck oil fume and the wind curtain device forming wind curtain, at least part of the power required by the wind curtain device to form the airflow of wind curtain is provided by the fan device.The wind curtain range hood introduced in the application improves the airflow source of wind curtain device, reduces equipment noise, reduces equipment energy consumption, and improves user experience.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of kitchen air purification equipment, and particularly relates to a wind curtain range hood. BACKGROUND

[0002] The kitchen purification equipment in the prior art relies on air flow to improve the kitchen gas environment. At present, the equipment is mostly range hood and related improved equipment, and there are various types of models, such as double-cylinder, single-cylinder, cover type, updraft, downdraft, etc. However, these range hoods are passive air suction equipment, and the oil fume suction port is a certain distance away from the cooking utensil generating oil fume, so that the oil fume generated instantaneously during cooking and having a certain kinetic energy cannot be completely removed. In order to solve the above problems, various kitchen purification equipment manufacturers improve the height and working power of the range hood to improve the oil fume suction effect, but the problem of oil fume overflow from the periphery of the cooking utensil cannot be solved. Moreover, the problem of oil fume escape cannot be solved by increasing the smoke cage area of the range hood to control the rising oil fume below the smoke hood, or by increasing the power of the main motor to enhance the smoke removal effect. Therefore, how to effectively block the oil fume escape has become a problem to be solved. Consumers have higher and higher requirements for the performance of kitchen air purification equipment, and large suction force has become the target pursued by major merchants, but the problems of incomplete suction and oil fume overflow cannot be solved by the range hoods currently sold on the market. During the cooking process, a small part of oil fume will always escape from the front of the machine and directly invade the cook's clothes, hair and face, which not only damages the facial skin, but also induces respiratory diseases if inhaled by the human body for a long time, directly affecting the user's health. Therefore, in order to solve the problem of oil fume escape, the range hood in the prior art is provided with a wind curtain device to isolate the user from the escaped oil fume during use. However, the wind curtain device needs to be provided with air flow by a wind curtain fan, which obviously increases the noise and energy consumption of the equipment, and the control system separately arranged for the wind curtain device also increases the system burden and control burden of the equipment.

[0003] Therefore, the present application is proposed. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a wind curtain range hood, which improves the air flow source of the wind curtain device, reduces the noise and energy consumption of the equipment, and improves the user experience.

[0005] To solve the above technical problems, the basic idea of the technical solution of the present application is as follows:

[0006] A wind curtain range hood comprises a fan device for providing power for sucking oil fume and a wind curtain device for forming a wind curtain, and at least part of the air flow required by the wind curtain device is provided by the fan device.

[0007] Preferably, the air duct of the air curtain device is in communication with the air duct of the fan device.

[0008] The present application is further provided that at least part of the power required for the air flow of the air curtain device is provided by the fan device.

[0009] Preferably, the air curtain device is arranged in the cavity formed by the housing of the air curtain range hood.

[0010] Preferably, the air curtain device has a structure with a through cavity inside.

[0011] Preferably, at least part of the air duct of the air curtain device is formed by the cover plate of the smoke collecting cavity and the housing of the air curtain range hood.

[0012] The present application is further provided that the air inlet of the air curtain device is in communication with the air duct of the fan device.

[0013] Preferably, the air inlet of the air curtain device is arranged to face the direction of the air flow in the air duct of the fan device.

[0014] Preferably, the angle between the direction of the air flow in the air duct of the fan device and the direction of the air inlet of the air curtain device ranges from 90° to 180°.

[0015] The present application is further provided that the air inlet of the air curtain device is connected to the position adjacent to the air outlet of the fan device.

[0016] The present application is further provided that the air curtain device comprises an air inlet part and a guide part which are in communication inside, the air inlet part is connected to the fan device so that the air flow in the fan device is guided into the air curtain device.

[0017] Preferably, at least part of the air inlet part is arranged in the air duct of the fan device.

[0018] Preferably, the air inlet part and / or the guide part are mainly in the form of a pipe.

[0019] The present application is further provided that the air inlet part and the guide part are connected through a transition part, the axis of the air inlet part and / or the guide part mainly extends in a straight line direction, the transition part has a certain bending angle, thereby changing the direction of the air flow in the air curtain device.

[0020] Preferably, the transition part is in the form of a pipe.

[0021] Preferably, the angle between the extension direction of the air flow in the guide part and the air outlet direction of the air curtain device ranges from 90° to 180°.

[0022] Preferably, the air inlet part, the transition part and the guide part are integrally arranged.

[0023] Preferably, the air curtain device comprises an air storage part for adjusting the air distribution inside the air curtain device, the air storage part is provided with air outlets of the air curtain device, and the air storage part constitutes part of the air duct of the air curtain device.

[0024] Preferably, the cavity inside the air storage part is annular, and the annular cavity of the air storage part is arranged around the air inlet of the air curtain range hood.

[0025] Preferably, the components of the cavity inside the air storage part include a smoke collection cavity cover plate surrounding the smoke collection cavity, a shell member connected around the smoke collection cavity cover plate, and a closure member arranged opposite to the smoke collection cavity cover plate and connected to the shell member.

[0026] Preferably, the number of the shell member and / or the smoke collection cavity cover plate and / or the closure member is at least one.

[0027] Preferably, the guide part communicates with the cavity inside the air storage part through the closure member / the smoke collection cavity cover plate / the shell member.

[0028] Preferably, the air curtain device comprises a foreign matter removal unit for purifying the air in the air duct inside the air curtain device.

[0029] Preferably, the foreign matter removal unit is connected to the guide part.

[0030] Preferably, the foreign matter removal unit is connected to the side of the guide part close to the air storage part.

[0031] Preferably, the foreign matter removal unit comprises a foreign matter removal unit switch for controlling the working state of the foreign matter removal unit.

[0032] Preferably, the foreign matter removal unit switch controls whether the foreign matter removal unit is connected to the air duct of the air curtain device.

[0033] Preferably, the foreign matter removal unit switch controls the degree to which the foreign matter removal unit is connected to the air duct of the air curtain device.

[0034] Preferably, the air outlet direction of the air outlet of the air curtain device is adjustable.

[0035] Preferably, the air curtain device is provided with a deflector plate at the position of the air outlet, and the extension direction of the deflector plate is adjustable.

[0036] Preferably, the number of the air outlets of the air curtain device is multiple, and the multiple air outlets of the air curtain device are arranged around the smoke collection cavity of the air curtain range hood.

[0037] The air curtain device further comprises a switch part for controlling the opening and closing of the internal air duct.

[0038] Preferably, the switch part is arranged on the guide part.

[0039] Preferably, the switch part is controlled by the pressure difference between the two ends.

[0040] The air curtain range further comprises:

[0041] The impurity removal device is arranged in the air curtain device and is used for removing impurities in the air duct of the air curtain range.

[0042] The gas condition acquisition device is used for acquiring the gas condition.

[0043] Preferably, the gas condition comprises the gas component and / or content.

[0044] The impurity removal capability judgment device judges the impurity removal capability of the impurity removal device according to the data obtained by the gas condition acquisition device.

[0045] The impurity removal capability judgment device adjusts the working state of the air curtain range and / or prompts the judgment result and / or prompts the operation suggestion according to the judgment result.

[0046] The gas condition acquisition device comprises a working area gas condition acquisition device for acquiring the gas component / content in the working area of the air curtain range and a duct gas condition acquisition device for acquiring the gas component / content in the air duct of the air curtain range.

[0047] Preferably, the air duct comprises the air curtain air duct of the air curtain device.

[0048] The air curtain range further comprises a fan device for generating airflow.

[0049] Preferably, the air duct comprises the fan air duct of the fan device.

[0050] The duct gas condition acquisition device comprises an air curtain air duct gas condition acquisition device for acquiring the gas component / content in the air curtain air duct.

[0051] Preferably, the duct gas condition acquisition device comprises a first duct gas condition acquisition device for acquiring the side of the airflow in the air curtain air duct moving towards the impurity removal unit.

[0052] Preferably, the impurity removal capability judging device compares the data obtained by the first air duct gas condition obtaining device with the data obtained by the working area gas condition obtaining device, and when the comparison result does not exceed a threshold value, the impurity removal capability of the impurity removal device is good.

[0053] The application is further provided that the air duct gas condition obtaining device comprises an air curtain air duct gas condition obtaining device for obtaining the gas component constitution / content in the air curtain air duct; the air duct gas condition obtaining device comprises a second air duct gas condition obtaining device for obtaining the side of the air flow in the air curtain air duct moving away from the impurity removal unit;

[0054] Preferably, the impurity removal capability judging device compares the data obtained by the second air duct gas condition obtaining device with the data obtained by the working area gas condition obtaining device, and when the comparison result does not exceed a threshold value, the impurity removal capability of the impurity removal unit is good.

[0055] The application is further provided that the air duct gas condition obtaining device comprises an air curtain air duct gas condition obtaining device for obtaining the gas component constitution / content in the air curtain air duct; the air duct gas condition obtaining device comprises a first air duct gas condition obtaining device for obtaining the side of the air flow in the air curtain air duct moving toward the impurity removal unit; the air duct gas condition obtaining device comprises a second air duct gas condition obtaining device for obtaining the side of the air flow in the air curtain air duct moving away from the impurity removal unit;

[0056] Preferably, the impurity removal capability judging device compares the data obtained by the first air duct gas condition obtaining device with the data obtained by the second air duct gas condition obtaining device, and when the comparison result does not exceed a threshold value, the impurity removal capability of the impurity removal unit is good.

[0057] The application is further provided that the impurity removal unit is a deflectable sheet layer structure arranged in the air curtain device air duct, and when the impurity removal unit is turned on, the sheet layer structure is turned to a certain angle with the air flow direction;

[0058] Preferably, the angle is 90°;

[0059] Preferably, when the impurity removal unit is turned off, the sheet layer structure is turned to be parallel to the air flow direction.

[0060] Preferably, at least a part of the gas condition obtaining device for detecting the component constitution and / or content of the surrounding environment is arranged on the side of the air curtain range hood close to the user;

[0061] Preferably, the side of the air curtain range hood close to the user is the front side.

[0062] The impurity removal unit comprises at least two impurity removal modules.

[0063] Preferably, the at least two impurity removal modules can at least partially overlap when in an open state.

[0064] Preferably, the impurity removal unit adjusts the filtering capacity level by changing the number of impurity removal modules in an open state.

[0065] The wind curtain range hood further comprises a position acquisition unit configured to acquire the position of the user, and the position acquisition unit is configured to obtain a second distance between the wind curtain airflow and the user according to the acquired position of the user and the air outlet direction / air outlet angle of the wind curtain device, and control the working state of the impurity removal unit and / or the gas condition acquisition device and / or prompt the acquisition result and / or prompt the operation suggestion according to the second distance.

[0066] Preferably, when the second distance reaches / fails to reach a corresponding threshold value, the impurity removal unit and / or the gas condition acquisition device are controlled to be turned on / turned off and / or the acquisition result is prompted and / or the operation suggestion is prompted.

[0067] Preferably, when the second distance reaches / fails to reach a corresponding threshold value, the impurity removal unit is controlled to increase / decrease the impurity removal capacity and / or the acquisition result is prompted and / or the operation suggestion is prompted.

[0068] Preferably, the air outlet direction of the wind curtain device is obtained from the data of the system and / or detected.

[0069] Compared with the prior art, the present application has the following beneficial effects.

[0070] 1. The wind curtain range hood introduced in the present application improves the airflow source of the wind curtain device, so that at least part of the gas discharged by the range hood is introduced into the wind curtain device to become the airflow source of the wind curtain. The gas entering the wind curtain device itself has kinetic energy, rather than relying solely on the kinetic energy provided by the wind curtain device, which significantly reduces the energy required to form the wind curtain airflow, thereby being beneficial to energy saving and environmental protection.

[0071] 2. The wind curtain range hood introduced in the present application has the air source of the wind curtain airflow as the air around the cooking appliance, so that even if this part of air is transmitted through a long path, it is closer to the temperature around the cooking appliance. Even if the wind curtain of this temperature directly contacts the human body, the user will not feel uncomfortable due to the temperature difference. Moreover, this temperature can significantly reduce the influence of the wind curtain airflow on the food being cooked, thereby avoiding the cooling effect on the food.

[0072] 3. The air curtain range hood described in this invention integrates the air curtain device inside the range hood, effectively concealing it and avoiding any impact on the range hood's appearance. Furthermore, this design shortens the distance between the air curtain device and the fan unit, ensuring that the airflow generated by the fan unit can efficiently deliver airflow into the air curtain device and discharge it through the air curtain device's outlet, achieving the air curtain function before the airflow performance significantly decreases.

[0073] 4. The air curtain range hood described in this invention has a designed air inlet orientation that allows the gas discharged from the fan to be pushed into the air curtain device more efficiently, thus avoiding the airflow loss due to obstruction caused by the air curtain device's own structure.

[0074] 5. The air curtain range hood described in this invention has a designed air inlet position for the air curtain device. Since the air flow energy is greatest at the air outlet of the fan device, the airflow performance at this position is also the most stable. Furthermore, with the purification device installed inside the range hood, the airflow at this position is fully purified gas, and the oil fumes contained therein are very limited, making it more suitable as an air curtain airflow.

[0075] 6. The air curtain range hood described in this invention features a multi-segment structure that ensures each segment functions effectively while maintaining compatibility with other segments. The main function of the air inlet is to effectively separate some of the airflow within the fan unit. Its extension direction is aligned with the airflow direction within the fan unit, allowing the separated airflow to enter the air curtain device without changing its flow direction, significantly reducing airflow resistance. The design of the guide section and transition section effectively alters the airflow direction. Furthermore, the guide section is preferably a tubular structure extending in a straight direction, further reducing airflow resistance within it.

[0076] 7. The air curtain range hood described in this invention incorporates an air storage unit. Airflow drawn from the fan is guided into this unit, redistributing its direction and allowing it to exit from the air curtain at appropriate locations. The air storage unit has a ring-shaped design, with the range hood's intake positioned at the center. This allows for multiple outlet locations around the intake, facilitating flexible placement of the air curtain outlet. Even in confined or structurally complex spaces, the air curtain outlet can be installed.

[0077] 8. The air curtain range hood introduced in this invention designs the air storage unit as being formed by the smoke collection chamber cover and the outer shell, which effectively utilizes the space of the equipment and gives the equipment components more functions, avoiding the burden on the equipment structure caused by the air curtain device.

[0078] 9、The wind curtain range hood introduced in the present application increases the design of the impurity removal unit, which can further ensure the cleanliness of the wind curtain airflow. Moreover, the impurity removal unit is arranged on the guide part, which is away from the air inlet of the wind curtain device to a certain extent, avoiding the setting of the impurity removal unit from hindering the airflow into the wind curtain device.

[0079] 10、The wind curtain range hood introduced in the present application increases the switch part for controlling the on-off of the air duct, so that the user can select the presence or absence of the wind curtain. Moreover, the switch part of the wind curtain device is designed as a pressure control switch, so that when the air pressure in the fan device reaches a certain degree, the equipment automatically opens the wind curtain device. The increase of the air pressure in the fan device indicates the increase of the suction force of the range hood, the fan is adjusted to a higher gear, and the risk of oil smoke overflow increases, at which time the wind curtain needs to be matched, so the wind curtain device is automatically opened. When the air pressure in the fan device decreases to a certain value, the switch part is closed.

[0080] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0081] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, the schematic embodiments of the present application and the description thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the accompanying drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0082] Figure 1 is a structure sectional view of the wind curtain range hood in the left view direction in an embodiment of the present application;

[0083] Figure 2 is a structure schematic diagram of the wind curtain range hood in the upward view direction in an embodiment of the present application.

[0084] In the drawings: 10, wind curtain range hood; 1, outer shell; 11, shell member; 21, air inlet of the wind curtain device; 23, air outlet of the wind curtain device; 24, air inlet part; 25, transition part; 26, guide part; 27, air storage part; 31, fan; 32, air duct of the fan device; 33, air outlet of the fan device; 4, smoke collection cavity cover plate; 5, closure; 6, impurity removal unit.

[0085] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0086] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments with reference to the drawings in the embodiments of the present application. The following embodiments are used to explain the present application, but are not used to limit the scope of the present application.

[0087] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0088] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0089] As shown in Figure 1 , Figure 2 The present application introduces a range hood, which includes a fan device for generating airflow and a range device for forming a range. At least part of the airflow required by the range device is provided by the fan device, and the air duct of the range device is in communication with the air duct of the fan device. The fan device is a general term for a series of devices and components, including a fan 31 for generating airflow. Preferably, the fan device further includes a fan device housing that encloses the air duct of the fan device. Through the range hood introduced by the present application, since the source of the range airflow is the air around the cooking appliance, even if this part of the air is transmitted through a longer path, it is closer to the temperature around the cooking appliance. Even if the range directly contacts the human body, the user will not feel uncomfortable due to the temperature difference. Moreover, such temperature can significantly reduce the influence of the range airflow on the food being cooked, avoiding the cooling effect on the food.

[0090] Embodiment one

[0091] As shown in Figure 1As shown, the difference between the air curtain range hood of this embodiment and the above embodiments is that at least part of the power for the airflow required to form the air curtain is provided by a fan device, and the air curtain device is disposed within the cavity formed by the outer shell 1 of the air curtain range hood, having a structure with a through cavity inside. Through the air curtain range hood described in this embodiment, the airflow source of the air curtain device is improved, so that at least a portion of the gas exhausted from the range hood is introduced into the air curtain device to become the airflow source for the air curtain. Therefore, the gas entering the air curtain device itself has kinetic energy, rather than simply relying on the kinetic energy provided by the air curtain device, significantly reducing the energy required to form the air curtain, which is beneficial for energy conservation and environmental protection. Furthermore, the air curtain range hood described in this embodiment, by placing the air curtain device inside the range hood, can effectively hide the air curtain device, avoiding any impact on the appearance of the range hood. Furthermore, this design can shorten the distance between the air curtain device and the fan device, ensuring that the airflow generated by the fan device can efficiently send the airflow into the air curtain device and discharge it from the air outlet of the air curtain device, thus achieving the function of the air curtain before the airflow performance is significantly reduced.

[0092] Furthermore, in the air curtain range hood described in this embodiment, the air inlet 21 of the air curtain device is connected to the air duct 32 of the fan device, and the air inlet 21 of the air curtain device is oriented towards the airflow direction within the air duct 32 of the fan device; preferably, the angle between the orientation of the air inlet 21 of the air curtain device and the airflow direction within the air duct 32 of the fan device is in the range of 90° to 180°. Through the air curtain range hood described in this embodiment, the orientation of the air inlet of the air curtain device is designed so that the gas discharged from the fan device can be more efficiently pushed into the air curtain device, avoiding the obstruction of airflow by the structure of the air curtain device itself, thus preventing the airflow from losing its flow performance.

[0093] Example 2

[0094] like Figure 1 As shown, the difference between the air curtain range hood in this embodiment and the one described above is that the air inlet 21 of the air curtain device is connected to the air outlet 33 of the adjacent fan device. Since the airflow energy is greatest at the air outlet 33 of the fan device, the airflow performance at this location is also the most stable. Furthermore, with a purification device installed inside the range hood, the airflow at this location is fully purified gas, containing very limited oil fumes, making it more suitable as an air curtain airflow.

[0095] Furthermore, the air curtain device described in this embodiment includes an internally connected air inlet 24 and a guide 26. The air inlet 24 is connected to a fan device, so that airflow from the fan device is guided into the air curtain device. At least a portion of the air inlet 24 is disposed within the air duct 32 of the fan device. Preferably, the air inlet 24 and / or the guide 26 are mainly pipe-like structures.

[0096] Furthermore, in the range hood described in this embodiment, the air inlet 24 and the guide section 26 are connected by a transition section 25. The axes of the air inlet 24 and / or the guide section 26 extend mainly in a straight line, and the transition section 25 has a certain bending angle, thereby changing the airflow direction in the air curtain device. Preferably, the angle between the extension direction of the guide section 26 along its internal airflow direction and the air outlet direction of the air curtain device is in the range of 90° to 180°. Preferably, the transition section 25 is pipe-shaped; the air inlet 24, the transition section 25, and the guide section 26 are integrally formed.

[0097] The air curtain range hood described in this embodiment features a multi-segment design that ensures each segment functions effectively while maintaining compatibility with other segments. The main function of the air inlet is to effectively separate some of the airflow from the fan unit. Its extension direction is aligned with the airflow direction within the fan unit, allowing the separated airflow to enter the air curtain device without changing its flow direction, significantly reducing airflow resistance. The design of the guide section and transition section effectively alters the airflow direction. Furthermore, the guide section is preferably a tubular structure extending in a straight direction, further reducing airflow resistance within it.

[0098] Example 3

[0099] like Figure 1 As shown, the difference between the air curtain range hood in this embodiment and the above embodiment is that the air curtain device includes an air storage section 27 for adjusting the distribution of gas inside it, and the air storage section 27 is provided with an air outlet 23 of the air curtain device. The air storage section 27 constitutes part of the air duct of the air curtain device.

[0100] Furthermore, in the range hood described in this embodiment, the internal cavity of the air storage unit 27 is annular, and the annular cavity of the air storage unit 27 surrounds the air intake of the air curtain range hood. Figure 1 The lower middle part of the structure shown is provided.

[0101] The air curtain range hood described in this embodiment incorporates an air storage unit. Airflow drawn from the fan is guided into this unit, redistributing its direction and allowing it to exit through the air curtain at appropriate locations. The air storage unit features a ring-shaped design, with the range hood's intake positioned at the center. This allows for multiple outlet locations around the intake, facilitating flexible placement of the air curtain outlet. Even in confined or structurally complex spaces, the air curtain outlet can be installed.

[0102] Furthermore, in the range hood described in this embodiment, the internal cavity of the air storage unit 27 comprises a smoke collection chamber cover 4 surrounding the smoke collection chamber, a housing member 11 connected to the smoke collection chamber cover 4 around it, and a closure member 5 disposed opposite to the smoke collection chamber cover 4 and connected to the housing member 11. The number of housing member 11 and / or smoke collection chamber cover 4 and / or closure member 5 is at least one. Preferably, the guide portion 26 passes through the closure member 5 / smoke collection chamber cover 4 / housing member 11 and communicates with the internal cavity of the air storage unit 27. Designing the air storage unit 27 to be formed by the equipment smoke collection chamber cover 4 and the housing with a portion spaced apart effectively utilizes the equipment space and gives the equipment components more functions, avoiding the structural burden of the equipment from the addition of an air curtain device.

[0103] Furthermore, in the range hood described in this embodiment, the air outlet 23 of the air curtain device has an adjustable air outlet direction. An air guide plate (not shown in the figure) is provided at the air outlet 23 of the air curtain device, and the extension direction of the air guide plate is adjustable. Preferably, there are multiple air outlets 23 of the air curtain device, and the multiple air outlets 23 of the air curtain device are arranged around the smoke collection chamber of the range hood.

[0104] Example 4

[0105] like Figure 1 As shown, the difference between the air curtain range hood of this embodiment and the above embodiments is that the air curtain device includes a purification unit 6 for purifying the gas in its internal air duct. Preferably, the purification unit 6 is connected to the guide portion 26. The addition of the purification unit further ensures the cleanliness of the airflow through the air curtain.

[0106] Furthermore, in the range hood described in this embodiment, the impurity removal unit 6 is connected to the guide portion 26 on the side near the air storage portion 27. This keeps the impurity removal unit a certain distance from the air inlet of the air curtain device, preventing the impurity removal unit from obstructing the airflow into the air curtain device.

[0107] Furthermore, the range hood with air curtain technology described in this embodiment includes a dust removal unit switch (not shown in the figure) for controlling the working state of the dust removal unit. The dust removal unit switch controls whether the dust removal unit is connected to the air duct of the air curtain device. When the dust removal unit switch is triggered to the open state, the dust removal unit is connected to the air duct of the air curtain device to achieve the dust removal function. When the dust removal unit switch is triggered to the closed state, the dust removal unit is disconnected from the air duct of the air curtain device. Disconnecting the dust removal unit from the air duct can reduce the airflow resistance in the air curtain device and increase the airflow fluidity of the air curtain device.

[0108] Further, the curtain range hood of the present embodiment is provided with a decontamination unit switch for controlling the degree of connection of the decontamination unit to the air duct of the air curtain device. The decontamination unit of the present embodiment comprises a multi-layer structure, each layer of which can realize a certain decontamination function. Preferably, the multi-layer decontamination unit has the same structure, and the number of layers of the decontamination unit connected to the air duct of the air curtain device can be controlled by the decontamination unit switch. When the multi-layer decontamination unit is connected to the air duct, the decontamination function is realized at the same time, ensuring the decontamination effect. When the number of layers of the decontamination unit connected to the air duct is small, the loss of air flow is minimized. The decontamination unit can be a device with filtering function.

[0109] Further, the curtain range hood of the present embodiment is provided with a decontamination unit switch for controlling the degree of connection of the decontamination unit to the air duct of the air curtain device. The decontamination unit of the present embodiment comprises a multi-layer structure, each layer of which can realize a certain decontamination function. Preferably, the multi-layer decontamination unit has the same structure, and the number of layers of the decontamination unit connected to the air duct of the air curtain device can be controlled by the decontamination unit switch. When the multi-layer decontamination unit is connected to the air duct, the decontamination function is realized at the same time, ensuring the decontamination effect. When the number of layers of the decontamination unit connected to the air duct is small, the loss of air flow is minimized. The decontamination unit can be a device with filtering function.

[0110] Embodiment Five

[0111] The difference between the curtain range hood of the present embodiment and the above-mentioned embodiments is that the air curtain device comprises a switch part for controlling the on-off of the internal air duct. By adding the switch part for controlling the on-off of the air duct, the user can choose whether to have the air curtain or not.

[0112] Further, the switch part of the curtain range hood of the present embodiment is arranged on the guide part. Preferably, the switch part realizes on-off control through the pressure difference between its two ends. By designing the switch part of the air curtain device as a pressure control switch, when the air pressure in the fan device reaches a certain degree, the equipment automatically turns on the air curtain device. The increase of the air pressure in the fan device indicates that the suction of the range hood increases, the fan is adjusted to a higher gear, and the risk of oil smoke overflow increases, at which time the air curtain needs to be matched, so the air curtain device is automatically turned on. When the air pressure in the fan device decreases to a certain value, the switch part is turned off.

[0113] Embodiment Six

[0114] The difference between the curtain range hood of the present embodiment and the above-mentioned embodiments is that at least part of the switch part of the air curtain device is arranged on the outside of the curtain range hood, and the user can perform triggering operation on the switch part to realize the closing / opening of the air curtain function of the air curtain device.

[0115] Further, the curtain range hood of the present embodiment comprises a position acquisition unit for acquiring the position of the user. The gas condition acquisition device comprises an atmosphere acquisition switch unit for controlling whether it is turned on or not.

[0116] Further, in the range hood with air curtain of the embodiment, the position acquisition unit is connected with the atmosphere acquisition switch unit and controls the working state of the gas condition acquisition device. When the position acquisition unit acquires that the first distance of the user from the range hood with air curtain reaches / fails to reach a corresponding threshold value, the atmosphere acquisition switch unit controls the air curtain device and / or the impurity removal unit and / or the gas condition acquisition device to be turned on / off and / or prompts the acquisition result and / or prompts the operation suggestion.

[0117] Further, in the range hood with air curtain of the embodiment, when the position acquisition unit acquires that the first distance of the user from the range hood with air curtain reaches / fails to reach a corresponding threshold value, the control is performed on the impurity removal unit to increase / decrease the impurity removal capability and / or prompt the acquisition result and / or prompt the operation suggestion. Preferably, the first distance is the distance between the air outlet of the range hood with air curtain and the user.

[0118] The range hood with air curtain introduced in the embodiment has the position acquisition unit. Preferably, the position acquisition unit is connected with the air curtain device, and when the position acquisition unit acquires that the state of the human body reaches a threshold value, the air curtain device is controlled to be turned on. Alternatively, the switch unit is connected with the position acquisition unit, and when the position acquisition unit acquires that the state of the human body reaches a threshold value, the gas condition acquisition device is controlled to be turned on. This control mode is beneficial to reduce the burden of the system.

[0119] Moreover, the range hood with air curtain introduced in the embodiment not only takes the position of the user as one of the conditions for controlling the air curtain to be turned on, but also limits the specific action mode. On one hand, whether the air curtain is meaningful to the user can be determined by the distance between the air outlet of the air curtain or the device and the user. If the user is near the device, the oil fume or water vapor is likely to affect the user. Alternatively, when the position of the user is near the device, the oil fume or water vapor is extremely likely to affect the user.

[0120] Embodiment Seven

[0121] The range hood with air curtain of the embodiment is different from the above-mentioned embodiments in that the position acquisition unit controls the working state of the impurity removal unit and / or prompts the acquisition result and / or prompts the operation suggestion according to the first distance and the result acquired by the gas condition acquisition device.

[0122] Further, in the range hood with air curtain of the embodiment, the position acquisition unit acquires the first distance and the result acquired by the gas condition acquisition device, determines whether the gas condition of the air curtain flow will affect the user, and if the determination result is yes, the working state of the impurity removal unit is adjusted and / or the acquisition result is prompted and / or the operation suggestion is prompted.

[0123] Embodiment Eight

[0124] The difference between the range hood of the present embodiment and the above-mentioned embodiments is that the range hood comprises a wind curtain device for forming a wind curtain and a gas condition acquisition device for acquiring the composition / amount of gas. The gas condition acquisition device comprises a first gas condition acquisition device for acquiring the composition / amount of gas in the working area of the range hood and a second gas condition acquisition device for acquiring the composition / amount of gas in the non-working area of the range hood. The working area comprises at least a part of the suction range of the suction port of the range hood, and the non-working area comprises at least a part of the upper side and / or the front side and / or the left side and / or the right side and / or the lower side of the range hood.

[0125] The range hood of the present embodiment defines the working area and the non-working area. The environment around the range hood is divided into at least two parts. The working area is near the suction port, which is the range of the suction force of the range hood, and the gas in this position is largely sucked into the range hood, and the gas in this position can represent the target gas composition of the range hood.

[0126] Further, the range hood of the present embodiment comprises a fan device for generating airflow. The control device is connected to the wind curtain device and / or the gas condition acquisition device, and adjusts the working state of the wind curtain device and / or prompts the judgment result and / or prompts the operation suggestion according to the data acquired by the gas condition acquisition device. The control device controls the working state of the gas condition acquisition device and / or the wind curtain device according to the working state of the fan device. Preferably, the working state of the wind curtain device comprises the on and / or off state. When the fan device is in the off state, the control device turns off the gas condition acquisition device and / or the wind curtain device.

[0127] Embodiment Nine

[0128] The difference between the range hood of the present embodiment and the above-mentioned embodiments is that the adjustment basis of the control device is the data generated by the wind curtain device and / or the gas condition acquisition device at the same time. Preferably, the data is real-time data, and the adjustment is real-time adjustment.

[0129] Alternatively, the adjustment basis of the control device is the data generated by the wind curtain device and / or the gas condition acquisition device in the same time period. Preferably, the data is a calculated value within a specified time, and the adjustment is intermittent adjustment. Further preferably, the specified time comprises a time automatically acquired by the device and / or a time set by the user.

[0130] The data acquired by the gas condition acquisition device can be acquired in real time, and the control of the control device can be based on real-time data or calculated data in a certain time period, such as average value calculation. This design enriches the control mode of the equipment, and the specific implementation mode can be automatically set by the system or selected by the user.

[0131] Embodiment ten

[0132] The wind curtain range hood of the embodiment is different from the above-mentioned embodiments in that the first gas condition acquisition device generates first data according to the gas in the working area, and the control device adjusts the working state of the wind curtain device and / or prompts the acquisition result and / or prompts the operation suggestion according to the first data. Preferably, when the first data reaches / fails to reach a corresponding threshold value, the wind curtain device is controlled to be turned on / off and / or the acquisition result is prompted and / or the operation suggestion is prompted.

[0133] When the first data is used as the only basis for investigation in the wind curtain range hood introduced in this embodiment, if the first data reaches a corresponding threshold value (corresponding to a situation where the oil fume is relatively serious), the wind curtain is selected to be turned on regardless of the second data. At this time, considering that the oil fume is already very serious, if it is not turned on, it will increase the risk of oil fume leakage to the non-working area, affecting the user's use environment. As the range hood works to a certain moment, the relationship between the first data and the second data at this time meets the condition for turning off the wind curtain, for example, when the oil fume content reflected by the second data is greater than the oil fume content reflected by the first data, the control device turns off the wind curtain or suggests the user to turn off the wind curtain, so as to suck the oil fume in the non-working area into the range hood, realizing the overall environmental improvement.

[0134] Embodiment eleven

[0135] The wind curtain range hood of the embodiment is different from the above-mentioned embodiments in that the first gas condition acquisition device generates first data according to the gas in the working area, and the second gas condition acquisition device generates second data according to the gas in the non-working area; the control device judges according to the first data, the second data and the corresponding threshold value, and adjusts the working state of the wind curtain device and / or prompts the judgment result and / or prompts the operation suggestion according to the judgment result. Preferably, if the comparison result between the first data and the second data exceeds the corresponding threshold value, the wind curtain device is adjusted to be turned on and / or the judgment result is prompted and / or the wind curtain device is suggested to be turned on.

[0136] Further, if the comparison result between the first data and the second data does not exceed the corresponding threshold value, the air curtain device is adjusted to be closed and / or the result of the prompting judgment is prompted and / or the air curtain device is suggested to be closed. At least part of the second gas condition acquisition device is arranged on the side of the air curtain range hood facing the user.

[0137] By the air curtain range hood introduced in the embodiment, the first data and the second data are compared, if the difference between the two is not large, it means that there is oil fume in the non-working area, at this time, the role of the generated air curtain in protecting the user is small. At this time, the air curtain is closed or the user is suggested to close the air curtain, so as to suck away the oil fume in the non-working area. Further, the present application defines the non-working area as the area where the user is located, in front of the range hood and the cooking range, which is beneficial to fully include the environment where the user is located in the investigation range.

[0138] Embodiment twelve

[0139] The air curtain range hood of the embodiment is different from the above-mentioned embodiments in that it comprises a dedusting device provided with a dedusting unit in the air curtain device, and a dedusting capacity judgment device for judging the dedusting capacity of the dedusting device through the data obtained by the gas condition acquisition device. When the dedusting device shows insufficient dedusting capacity, it may be that the dedusting device needs to be replaced or cleaned, or it may be that the oil fume near the cooking range is heavy at this time, at which time the air fan device of the equipment is adjusted to increase the air suction capacity. The present application further introduces a dedusting device / dedusting unit with adjustable dedusting capacity, which is combined with the dedusting device / dedusting unit introduced in the present application, so that the air curtain range hood can control the dedusting capacity of the dedusting device / dedusting unit through the results obtained by the gas condition acquisition device, to ensure the dedusting effect under different use conditions.

[0140] Further, the gas condition acquisition device in the embodiment comprises a working area gas condition acquisition device for obtaining the gas component composition / amount of the working area of the air curtain range hood and a duct gas condition acquisition device for obtaining the gas component composition / amount in the duct of the air curtain range hood. The duct includes the air curtain duct of the air curtain device. By designing the gas condition acquisition device to include at least the working area gas condition acquisition device and the duct gas condition acquisition device, the target gas component situation in the working area and the gas component situation in the duct are comprehensively investigated, which can effectively represent the removal effect of the dedusting device on the target substance. At this time, the duct gas condition acquisition device is preferably arranged on the side of the dedusting device communicating with the outlet of the duct.

[0141] Further, the air curtain gas condition acquisition device in the embodiment includes an air curtain air duct gas condition acquisition device for acquiring the gas component composition / amount in the air curtain air duct. The air curtain gas condition acquisition device includes a first air duct gas condition acquisition device for acquiring the side of the air flow in the air curtain air duct moving towards the impurity removal unit. The impurity removal capability judgment device compares the data acquired by the first air duct gas condition acquisition device with the data acquired by the working area gas condition acquisition device. When the comparison result does not exceed a threshold value, the impurity removal capability of the impurity removal device is good. Through the air curtain range hood introduced in the embodiment, the first air duct gas condition acquisition device is added in the air duct of the air curtain device for investigating the air flow quality of the air curtain. The investigation result can be that the air curtain air flow quality is good and the air curtain range hood can be normally used. Or the air curtain air flow quality is not good. According to the first air duct gas condition acquisition device, the impurity removal capability of the impurity removal device and / or the impurity removal unit is adjusted or the user is prompted that the quality is not good. Further, when the equipment adjusts the impurity removal capability of the impurity removal device and / or the impurity removal unit to the limit set by the system, the user is prompted to check the current situation.

[0142] The air curtain range hood in the embodiment is different from the above-mentioned embodiments in that the air duct gas condition acquisition device includes an air curtain air duct gas condition acquisition device for acquiring the gas component composition / amount in the air curtain air duct; and the air duct gas condition acquisition device includes a second air duct gas condition acquisition device for acquiring the side of the air flow in the air curtain air duct moving away from the impurity removal unit.

[0143] Further, the impurity removal capability judgment device compares the data acquired by the second air duct gas condition acquisition device with the data acquired by the working area gas condition acquisition device. When the comparison result does not exceed a threshold value, the impurity removal capability of the impurity removal device and / or the impurity removal unit is good.

[0144] The second air duct gas condition acquisition device is added in the air duct of the air curtain device. The comparison of the data acquired by the second air duct gas condition acquisition device with the data acquired by the working area gas condition acquisition device can further investigate the impurity removal capability of the impurity removal device and / or the impurity removal unit. The investigation result is more intuitive.

[0145] The air duct gas condition acquisition device includes an air curtain air duct gas condition acquisition device for acquiring the gas component composition / amount in the air curtain air duct; the air duct gas condition acquisition device includes a first air duct gas condition acquisition device for acquiring the side of the air flow in the air curtain air duct moving towards the impurity removal unit; and the air duct gas condition acquisition device includes a second air duct gas condition acquisition device for acquiring the side of the air flow in the air curtain air duct moving away from the impurity removal unit.

[0146] Further, the impurity removal capacity judging device in the embodiment compares the data obtained by the first air duct gas condition obtaining device with the data obtained by the second air duct gas condition obtaining device, and when the comparison result does not exceed a threshold value, the impurity removal capacity of the impurity removal unit is good. Comparing the data between the first air duct gas condition obtaining device and the second air duct gas condition obtaining device can separately investigate the impurity removal capacity of the impurity removal unit.

[0147] The above merely describes preferred embodiments of the present application and is not intended to limit the present application in any form. Although the present application has been disclosed above with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content with equivalent embodiments of equivalent changes, without departing from the technical solution range of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical solution of the present application, still belongs to the scope of the present application.

Claims

1. A range hood with an air curtain, comprising a fan device for powering the extraction of cooking fumes and an air curtain device for forming an air curtain, characterized in that, At least part of the power for the airflow required to form the air curtain is provided by the fan device; The air curtain range hood also includes: a location acquisition unit for acquiring the user's location, connected to the air curtain device; The air curtain device includes a purification unit for purifying a portion of the airflow provided by the fan device; When the location acquisition unit detects that the first distance between the user and the air curtain range hood reaches a threshold, it controls the impurity removal unit to improve the impurity removal capability. Air curtain range hoods also include: a gas condition acquisition device; The gas condition acquisition device includes a first gas condition acquisition device and a second gas condition acquisition device; The first gas condition acquisition device generates first data based on the gas in the working area, and the second gas condition acquisition device generates second data based on the gas in the non-working area; the control device makes a judgment based on the first data, the second data, and the corresponding threshold. If the difference between the first data and the second data exceeds the corresponding threshold, the opening of the air curtain device will be adjusted and / or the judgment result and / or a suggestion to open the air curtain device will be displayed. If the difference between the first data and the second data does not exceed the corresponding threshold, then adjust the air curtain device to close and / or prompt the judgment result and / or prompt the suggestion to close the air curtain device; The working area includes at least a portion of the air intake range of the air curtain range hood; The non-working area includes the upper and / or front and / or left and / or right and / or lower side of the air curtain range hood.

2. The air curtain range hood according to claim 1, characterized in that, The air duct of the air curtain device is connected to the air duct of the fan device.

3. The air curtain range hood according to claim 2, characterized in that, The air curtain device is disposed within the cavity formed by the outer shell of the air curtain range hood.

4. The air curtain range hood according to claim 3, characterized in that, The air curtain device has a structure with a through cavity inside.

5. The air curtain range hood according to claim 2, characterized in that, The air inlet of the air curtain device is connected to the air duct of the fan device.

6. The air curtain range hood according to claim 5, characterized in that, The air inlet of the air curtain device is positioned to face the airflow direction within the duct of the fan device.

7. The air curtain range hood according to claim 6, characterized in that, The angle between the air inlet orientation of the air curtain device and the airflow direction in the duct of the fan device is in the range of 90° to 180°.

8. The air curtain range hood according to claim 7, characterized in that, The air inlet of the air curtain device is connected to the air outlet of the fan device.

9. The air curtain range hood according to claim 8, characterized in that, The air curtain device includes an air inlet and a guide that are internally connected. The air inlet is connected to the fan device, so that the airflow in the fan device is guided into the air curtain device.

10. The air curtain range hood according to claim 9, characterized in that, At least a portion of the air inlet is disposed within the air duct of the fan device.

11. The air curtain range hood according to claim 10, characterized in that, The air inlet and / or guide section are mainly pipe-like structures.

12. The air curtain range hood according to claim 9, characterized in that, The air inlet and the guide are connected by a transition section. The axis of the air inlet and / or the guide extends mainly in a straight line. The transition section has a certain bending angle, thereby changing the airflow direction in the air curtain device.

13. The air curtain range hood according to claim 12, characterized in that, The transition section is pipe-shaped.

14. The air curtain range hood according to claim 12, characterized in that, The angle between the extension direction of the guide part along its internal airflow direction and the air outlet direction of the air curtain device is in the range of 90° to 180°.

15. The air curtain range hood according to claim 14, characterized in that, The air inlet, transition section, and guide section are integrated into one unit.

16. The air curtain range hood according to claim 9, characterized in that, At least a portion of the air duct of the air curtain device is composed of the smoke collection chamber cover and the outer shell of the air curtain range hood.

17. The air curtain range hood according to claim 16, characterized in that, The air curtain device includes an air storage section for adjusting the internal gas distribution, and the air storage section is provided with an air outlet of the air curtain device. The air storage section constitutes part of the air duct of the air curtain device.

18. The air curtain range hood according to claim 17, characterized in that, The internal cavity of the air storage unit is annular, and the annular cavity of the air storage unit is arranged around the air intake of the air curtain range hood.

19. The air curtain range hood according to claim 18, characterized in that, The internal cavity of the air storage unit includes a smoke collection chamber cover plate that surrounds the smoke collection chamber, a shell component connected to the smoke collection chamber cover plate around it, and a closure component that is disposed opposite to the smoke collection chamber cover plate and connected to the shell component.

20. The air curtain range hood according to claim 19, characterized in that, The number of the shell components and / or the smoke collection chamber cover and / or closure is at least one.

21. The air curtain range hood according to claim 20, characterized in that, The guide section passes through the closure / smoke chamber cover / shell component and communicates with the cavity inside the air storage section.

22. The air curtain range hood according to claim 17, characterized in that, The impurity removal unit is connected to the guide section.

23. The air curtain range hood according to claim 22, characterized in that, The impurity removal unit is connected to the side of the guide unit near the air storage unit.

24. The air curtain range hood according to claim 23, characterized in that, The impurity removal unit includes an impurity removal unit switch for controlling the working state of the impurity removal unit.

25. The air curtain range hood according to claim 24, characterized in that, The impurity removal unit switch controls whether the impurity removal unit is connected to the air duct of the air curtain device.

26. The air curtain range hood according to claim 25, characterized in that, The impurity removal unit switch controls the degree to which the impurity removal unit is connected to the air duct of the air curtain device.

27. The air curtain range hood according to any one of claims 1 to 26, characterized in that, The air outlet direction of the air curtain device is adjustable.

28. The air curtain range hood according to claim 27, characterized in that, The air curtain device is equipped with an air guide plate at the air outlet, and the extension direction of the air guide plate is adjustable.

29. The air curtain range hood according to claim 28, characterized in that, The air curtain device has multiple air outlets, which are arranged around the smoke collection chamber of the air curtain range hood.

30. The air curtain range hood according to claim 22, characterized in that, The air curtain device includes a switch for controlling the opening and closing of its internal air ducts.

31. The air curtain range hood according to claim 30, characterized in that, The switch is disposed on the guide.

32. The air curtain range hood according to claim 31, characterized in that, The switching unit achieves on / off control through the pressure difference between its two ends.

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