Range hood

Abstract

The utility model relates to the technical field of range hoods, and discloses a range hood. The range hood comprises a shell, a smoke exhaust cavity provided with a smoke suction port, an inner smoke exhaust port and an outer smoke exhaust port is defined, the outer smoke exhaust port is communicated with the outside or a public flue, and the inner smoke exhaust port is communicated with the inside; the purification device is positioned in the smoke exhaust cavity, is positioned between the smoke suction port and the inner smoke exhaust port, and is used for purifying the oil smoke flowing from the smoke suction port to the inner smoke exhaust port; the number of the draught fan is one, and the draught fan is located in the smoke discharging cavity. Wherein the smoke suction port is communicated with the inner smoke exhaust port and the outer smoke exhaust port, and when the fan works, the fan can drive oil smoke of the smoke suction port to be discharged through the inner smoke exhaust port and the outer smoke exhaust port at the same time. According to the range hood disclosed by the embodiment of the invention, only one fan needs to be arranged to simultaneously realize internal circulation and external discharge of oil fume, and the oil fume can automatically distribute the smoke discharge amount of external discharge and internal circulation according to the smoke discharge resistance of the public flue, so that the condition that the oil fume cannot be discharged is avoided, and the suction rate of the range hood is improved.

Description

Technical Field

[0001] The present application relates to the technical field of range hoods, for example, to a range hood. Background Art

[0002] At present, as an important kitchen appliance for purifying the kitchen air environment, the range hood can absorb the fumes and harmful waste in the kitchen and discharge them to the outdoor environment through the public flue, reducing environmental pollution and purifying the air. However, during the peak cooking period, the range hoods on each floor will exhaust smoke to the public flue at the same time, resulting in excessive overall pressure in the public flue, affecting the exhaust of users, and causing the range hood to be unable to quickly exhaust the fumes to the public flue, resulting in poor exhaust effect; in addition, when the public flue fails, users cannot use the range hood to effectively exhaust the fumes, resulting in poor user experience.

[0003] A range hood is disclosed in the related technology, comprising a box body, in which an internal circulation air duct and an external exhaust duct are formed, the exhaust port of the external exhaust duct is used to connect to the public flue of the building, the exhaust port of the internal circulation air duct is connected to the room, and the suction port of the internal circulation air duct and the suction port of the external exhaust duct are both connected to the room; a sub-fan and a filter assembly are provided in the internal circulation air duct, and the airflow introduced by the sub-fan passes through the filter assembly and is delivered from the exhaust port of the internal circulation air duct.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] In the range hood in the related art, the range hood is equipped with two fans for exhausting smoke, which increases the cost of the range hood and is not conducive to the popularization and use of the range hood.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The disclosed embodiment provides a range hood to reduce the cost of the range hood and facilitate the popularization and use of the range hood.

[0009] The disclosed embodiment provides a range hood, which comprises: a shell, defining a smoke exhaust chamber with an inlet, an inner smoke exhaust port and an outer smoke exhaust port, wherein the outer smoke exhaust port is connected to the outdoors or a public smoke duct, and the inner smoke exhaust port is connected to the indoors; a purification device, located in the smoke exhaust chamber and between the inlet and the inner smoke exhaust port, for purifying the oil smoke flowing from the inlet to the inner smoke exhaust port; a fan, which is located in the smoke exhaust chamber; wherein the inlet is connected to both the inner smoke exhaust port and the outer smoke exhaust port, and when the fan is working, the fan can drive the oil smoke in the inlet to be discharged through the inner smoke exhaust port and the outer smoke exhaust port at the same time.

[0010] Optionally, the fan has an air outlet, which is connected to both the inner smoke exhaust port and the outer smoke exhaust port, so that the oil smoke flowing out of the air outlet of the fan can flow to the inner smoke exhaust port and the outer smoke exhaust port at the same time; or, the fan has multiple air outlets, and at least two of the multiple air outlets are respectively connected to the inner smoke exhaust port and the outer smoke exhaust port.

[0011] Optionally, the top wall of the shell is provided with an external smoke exhaust port, and at least one side wall of the shell is provided with an internal smoke exhaust port.

[0012] Optionally, the shell includes: a smoke collecting shell, which defines a smoke collecting chamber with a smoking port; a smoke exhaust shell, which defines a smoke exhaust channel, which is connected to the smoke collecting chamber, and the smoke exhaust chamber includes the smoke exhaust channel and the smoke collecting chamber, and the fan is located in the smoke exhaust channel; wherein, the top wall of the smoke exhaust shell is provided with an external smoke exhaust port, and the side wall of the smoke exhaust shell is provided with an internal smoke exhaust port, and the top end of the internal smoke exhaust port is arranged against the top wall of the smoke exhaust shell.

[0013] Optionally, the range hood also includes: a partition, which is located in the smoke exhaust chamber, the partition is connected to the shell, and the partition and the shell enclose an air outlet chamber with a vent; the external smoke exhaust port is located on the top wall of the air outlet chamber, the internal smoke exhaust port is located on the side wall of the air outlet chamber and / or the side wall of the air outlet chamber, the vent is located on the bottom wall of the air outlet chamber, and the vent is communicated with the air outlet of the fan.

[0014] Optionally, the fan includes: a volute having an air inlet and an air outlet; an impeller rotatably disposed in the volute; a partition is connected to the volute, and the vent is matched with the air outlet.

[0015] Optionally, the purification device is located in the air outlet cavity, and the purification device includes: a first filter element, located between the ventilation port and the inner smoke exhaust port, one end of the first filter element is connected to the inner edge of the outer smoke exhaust port facing the inner smoke exhaust port; wherein, the other end of the first filter element is connected to the outer edge of the ventilation port facing the inner smoke exhaust port, or, the other end of the first filter element is connected to the inner side wall of the volute facing the inner smoke exhaust port.

[0016] Optionally, when the other end of the first filter element is connected to the outer edge of the vent facing the inner smoke exhaust port, the outer edge of the vent is recessed to form a mounting portion, the outer edge of the volute and the other end of the first filter element are respectively abutted against both sides of the mounting portion, and the mounting portion is connected to both the first filter element and the volute.

[0017] Optionally, the purification device further comprises: a second filter element, the number of which is one or more, located between the first filter element and the inner smoke exhaust port.

[0018] Optionally, the partition is detachably connected to the volute; and / or the purification device is detachably connected to the cavity wall of the air outlet cavity.

[0019] The range hood provided by the embodiment of the present disclosure can achieve the following technical effects:

[0020] The range hood provided by the embodiment of the present disclosure has a housing provided with a smoke inlet, an inner smoke outlet and an outer smoke outlet. The range hood is equipped with a fan. When the fan is working, the fan rotates in the smoke exhaust chamber, so that a negative pressure is formed in the smoke exhaust chamber, and the indoor smoke can flow into the smoke exhaust chamber through the smoke inlet. The smoke inlet is connected to both the inner smoke outlet and the outer smoke outlet, so that the smoke in the smoke inlet can flow to the inner smoke outlet and the outer smoke outlet at the same time, so that the indoor smoke can be discharged from the smoke exhaust chamber through the inner smoke outlet and the outer smoke outlet at the same time, so as to avoid the situation that the public smoke duct is blocked or damaged when the smoke can only be discharged from the public smoke duct, resulting in smoke exhaust failure. Specifically, when the smoke exhaust resistance of the outer smoke outlet is greater than the smoke exhaust resistance of the inner smoke outlet, most of the smoke in the smoke exhaust chamber will be purified by the purification device and then discharged from the inner smoke outlet to the indoor room for internal circulation, and a small part of the smoke will be discharged into the public smoke duct through the outer smoke outlet. When the exhaust resistance of the external exhaust port is less than that of the internal exhaust port, most of the oil smoke in the exhaust chamber will be discharged into the public flue through the external exhaust port, and then discharged to the outside, while a small part of the oil smoke will flow back to the room through the internal exhaust port and the purification device for circulation. The range hood of the disclosed embodiment only needs to be equipped with one fan to achieve internal circulation and external exhaust of oil smoke at the same time, and the oil smoke can automatically distribute the exhaust volume of external exhaust and internal circulation according to the exhaust resistance of the public flue, avoiding the situation where the oil smoke cannot be discharged, and improving the suction rate of the range hood. Moreover, only one fan is needed, which can reduce the cost of the range hood and facilitate the popularization of the range hood.

[0021] The oil smoke of the range hood of the disclosed embodiment automatically selects the exhaust port according to the resistance of the common flue, so there is no need to set various control valves and sensors, which further reduces the cost of the range hood, reduces the failure rate of the range hood, and increases the service life of the range hood.

[0022] In addition, the range hood of the embodiment of the present disclosure can automatically adjust the smoke exhaust volume and the smoke exhaust port, and only one range hood needs to be set up, which can effectively reduce the working noise of the range hood and improve the user experience.

[0023] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0025] Figure 1 is a schematic diagram of the structure of a range hood provided by an embodiment of the present disclosure;

[0026] Figure 2 is a schematic cross-sectional structure diagram of a range hood provided by an embodiment of the present disclosure;

[0027] Figure 3 is a partial structural schematic diagram of a range hood provided by an embodiment of the present disclosure;

[0028] Figure 4 is a partial structural schematic diagram of another range hood provided by an embodiment of the present disclosure;

[0029] Figure 5 is a partial structural schematic diagram of another range hood provided by an embodiment of the present disclosure;

[0030] Figure 6 It is a schematic diagram of the structure of a partition provided in an embodiment of the present disclosure.

[0031] Reference numerals:

[0032] 10. Shell; 101. Smoke exhaust chamber; 1011. Smoke collecting chamber; 1012. Smoke exhaust channel; 102. Smoke outlet; 103. Internal smoke exhaust outlet; 104. External smoke exhaust outlet; 105. Smoke collecting shell; 106. Smoke exhaust shell; 20. Fan; 201. Impeller; 202. Volute; 203. Air inlet; 204. Air outlet; 30. Partition; 301. Air outlet chamber; 302. Ventilation port; 303. Mounting portion; 40. Purification device; 401. First filter element; 402. Second filter element. DETAILED DESCRIPTION

[0033] In order to be able 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 is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0034] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments 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 terms used in this way can be interchanged where appropriate to describe the disclosed embodiments here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. 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 circumstances.

[0036] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or 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 circumstances.

[0037] Unless otherwise stated, the term "plurality" means two or more.

[0038] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0040] For ease of description, the front, back, top, and bottom directions of this application are as follows: Figure 1 shown.

[0041] Combination Figures 1 to 6As shown, the embodiment of the present disclosure provides a range hood, which includes a shell 10 and a fan 20. The shell 10 defines a smoke exhaust chamber 101 having a smoke intake port 102, an inner smoke exhaust port 103 and an outer smoke exhaust port 104. The number of the fan 20 is one, and the fan 20 is located in the smoke exhaust chamber 101. The fan 20 can drive the indoor smoke to flow into the smoke exhaust chamber 101 through the smoke intake port 102, and then flow from the smoke exhaust chamber 101 to the inner smoke exhaust port 103 and the outer smoke exhaust port 104. Driven by the fan 20, the smoke can be discharged from the inner smoke exhaust port 103 and the outer smoke exhaust port 104 at the same time. The smoke discharged from the inner smoke exhaust port 103 can flow into the room and then circulate, and the smoke discharged from the outer smoke exhaust port 104 can be discharged from the outer smoke exhaust port 104 into a public flue and then discharged to the outside.

[0042] like Figures 2 to 5 As shown, the range hood further includes a purification device 40, which is located in the smoke exhaust cavity 101. When the fan 20 drives the airflow from the smoke outlet 102 to the inner smoke outlet 103, the purification device 40 can purify the smoke flowing from the smoke outlet 102 to the inner smoke outlet 103 and then flow it into the room for circulation. In this way, the purification device 40 can purify impurities, odors, harmful substances and other wastes contained in the smoke, and then the purified smoke flows back into the room to achieve internal circulation.

[0043] The range hood provided by the embodiment of the present disclosure is provided with a fan 20, and the fan 20 can drive the oil smoke in the exhaust chamber 101 to flow to the inner exhaust port 103 and the outer exhaust port 104 at the same time. When the exhaust resistance of the outer exhaust port 104 is greater than the exhaust resistance of the inner exhaust port 103, most of the oil smoke in the exhaust chamber 101 is discharged from the inner exhaust port 103, and a small part of the oil smoke is discharged from the outer exhaust port 104 to the public flue, which can avoid the situation where the public flue is damaged or the resistance of the public flue is large, resulting in the oil smoke being unable to be discharged. When the exhaust resistance of the outer exhaust port 104 is less than the resistance of the inner exhaust port 103, most of the oil smoke in the exhaust chamber 101 is discharged into the public flue through the outer exhaust port 104, and a small part of the oil smoke is discharged into the room through the inner exhaust port 103, which can increase the exhaust volume of the range hood and reduce the load and pressure of the fan 20. In the embodiment of the present disclosure, by providing the inner smoke exhaust port 103 and the outer smoke exhaust port 104, the smoke exhaust area and smoke exhaust volume of the range hood are increased, the smoke exhaust effect is improved, and at the same time, it can avoid the situation where the inner smoke exhaust port 103 or the outer smoke exhaust port 104 is damaged or blocked, resulting in smoke exhaust failure. Moreover, by providing a fan 20, the internal circulation and external exhaust of oil smoke can be achieved at the same time, which reduces the cost of the range hood, reduces the probability of damage to the range hood, and improves the popularity and service life of the range hood. In addition, the range hood of the embodiment of the present disclosure can automatically adjust the smoke exhaust volume and the smoke exhaust port, and only one range hood needs to be provided, which can effectively reduce the working noise of the range hood and improve the user experience.

[0044] Alternatively, if Figure 2 As shown, along the airflow direction in the smoke exhaust cavity 101 , the inner smoke exhaust port 103 and the outer smoke exhaust port 104 are both located downstream of the fan 20 .

[0045] In the disclosed embodiment, the inner smoke exhaust port 103 and the outer smoke exhaust port 104 are located downstream of the fan 20, so that the fan 20 drives the airflow of the smoke outlet 102 to flow to the inner smoke exhaust port 103 and the outer smoke exhaust port 104 at the same time, which can increase the exhaust volume and exhaust effect of oil smoke.

[0046] Optionally, the fan 20 has an air outlet 204 , which is connected to both the inner smoke exhaust port 103 and the outer smoke exhaust port 104 , so that the oil smoke flowing out of the air outlet 204 of the fan 20 can flow to the inner smoke exhaust port 103 and the outer smoke exhaust port 104 at the same time.

[0047] In the disclosed embodiment, the fan 20 has an air outlet 204, and the air outlet 204 is connected to both the inner smoke exhaust port 103 and the outer smoke exhaust port 104. In this way, the airflow in the range hood can be discharged externally and circulated internally at the same time without changing the structure of the fan 20 itself.

[0048] Optionally, the fan 20 may also be provided with a plurality of air outlets 204, including a first air outlet 204 and a second air outlet 204, wherein the first air outlet 204 is connected to the inner smoke exhaust port 103, and the second air outlet 204 is connected to the outer smoke exhaust port 104, so that the oil smoke can be diverted from the fan 20 to improve the smoke exhaust efficiency.

[0049] Alternatively, if Figure 3 As shown, the top wall of the housing 10 is provided with an external smoke exhaust port 104 , and at least one side wall of the housing 10 is provided with an internal smoke exhaust port 103 .

[0050] In the disclosed embodiment, the external smoke exhaust port 104 is located on the top wall of the housing 10, so that the external smoke exhaust port 104 is conveniently connected to the public flue. The side wall of the housing 10 is provided with an internal smoke exhaust port 103, so that the internal smoke exhaust port 103 can be directly connected to the room, so as to prevent the external smoke exhaust port 104 from leaking into the room, and to prevent the external exhaust and internal circulating oil smoke from affecting each other outside the housing 10. Multiple internal smoke exhaust ports 103 can also be provided, which can not only increase the smoke exhaust volume, but also further reduce the noise when the range hood is working.

[0051] Optionally, the upper end of the inner smoke exhaust port 103 extends to the top of the housing 10, so that the air outlet of the inner smoke exhaust port 103 is as high as possible, reducing the impact on the airflow of the smoking port 102 and the user.

[0052] Optionally, at least two side walls of the housing 10 are provided with inner smoke exhaust ports 103 .

[0053] In the embodiment of the present disclosure, at least two side walls of the shell 10 are provided with internal smoke exhaust ports 103, which can increase the opening area of ​​the internal smoke exhaust ports 103, improve the smoke exhaust volume, and avoid blockage or excessive resistance when most of the oil smoke is discharged from the internal smoke exhaust ports 103.

[0054] Optionally, at least two adjacent side walls of the housing 10 are provided with inner smoke exhaust ports 103, so that the smoke can be automatically distributed in exhaust volume according to the resistance of the inner smoke exhaust ports 103 of the two side walls, thereby improving the exhaust effect.

[0055] Optionally, two opposite side walls of the shell 10 are provided with inner smoke exhaust ports 103, which can improve the flow direction of the oil smoke flowing out of the inner smoke exhaust ports 103 and improve the flow uniformity of the indoor airflow.

[0056] Optionally, three side walls of the housing 10 are provided with inner smoke exhaust ports 103, which can further improve the smoke exhaust effect. It can be understood that in practical applications, the number and position of the inner smoke exhaust ports 103 can be set according to the size, shape and installation position of the housing 10, and embodiments that can achieve simultaneous smoke exhaust from the inner smoke exhaust ports 103 and the outer smoke exhaust ports 104 are all optional embodiments of the present application.

[0057] Optionally, the housing 10 includes a smoke exhaust housing 106 and a smoke collecting housing 105, the smoke collecting housing 105 is located below the smoke exhaust housing 106, the smoke collecting housing 105 defines a smoke collecting chamber 1011, the smoke exhaust housing 106 defines a smoke exhaust passage 1012, the smoke exhaust chamber 101 includes the smoke collecting chamber 1011 and the smoke exhaust passage 1012, the smoke collecting chamber 1011 and the smoke exhaust passage 1012 are connected, and the fan 20 is located in the smoke exhaust passage 1012. The smoke collecting housing 105 is provided with a smoke outlet 102, the smoke outlet 102 is connected with the smoke collecting chamber 1011, and the smoke exhaust housing 106 is provided with an inner smoke exhaust port 103 and an outer smoke exhaust port 104. Among them, the top wall of the smoke exhaust housing 106 is provided with an outer smoke exhaust port 104, and the side wall of the smoke exhaust housing 106 is provided with an inner smoke exhaust port 103.

[0058] In the disclosed embodiment, the smoke collecting chamber 1011 is connected to the smoke outlet 102, and the oil smoke sucked in by the smoke outlet 102 first enters the smoke collecting chamber 1011, and the smoke collecting chamber 1011 can accommodate a certain amount of oil smoke. The fan 20 is located in the smoke exhaust channel 1012, and the smoke exhaust channel 1012 has an inner smoke exhaust port 103 and an outer smoke exhaust port 104, so that the fan 20 drives the oil smoke in the smoke collecting chamber 1011 to flow into the smoke exhaust channel 1012, and then it is discharged from the inner smoke exhaust port 103 and the outer smoke exhaust port 104.

[0059] Optionally, the top end of the inner smoke exhaust port 103 is arranged close to (fitted with or close to) the top wall of the smoke exhaust housing 106. In this way, the air outlet area of ​​the smoke exhaust port can be guaranteed, and the smoke exhaust volume can be guaranteed.

[0060] Optionally, the lower end of the inner smoke exhaust port 103 is flush with the upper end of the fan 20, which can further increase the height dimension of the inner smoke exhaust port 103 and improve the smoke exhaust volume.

[0061] Optionally, the length of the inner smoke exhaust port 103 matches the side wall of the corresponding shell 10, that is, the length of the inner smoke exhaust port 103 is the same as the length of the side wall of the shell 10 where the inner smoke exhaust port 103 is set. This can ensure the length dimension of the inner smoke exhaust port 103 and further increase the smoke exhaust volume.

[0062] Optionally, the cross section of the smoke exhaust housing 106 is rectangular, and at least two side walls of the rectangle are provided with inner smoke exhaust ports 103 .

[0063] Optionally, the right side wall and the rear side wall of the smoke exhaust housing 106 are provided with inner smoke exhaust ports 103 to increase the smoke exhaust volume.

[0064] Optionally, the inner smoke exhaust port 103 and the outer smoke exhaust port 104 are located above the fan 20 , so that the inner smoke exhaust port 103 and the outer smoke exhaust port 104 are located downstream of the fan 20 .

[0065] Optionally, the lower ends of the inner smoke exhaust ports 103 of the multiple side walls are in the same horizontal plane, and / or the upper ends of the inner smoke exhaust ports 103 of the multiple side walls are in the same horizontal plane, which facilitates the arrangement of the inner smoke exhaust ports 103 of the multiple side walls and also facilitates the exhaust of smoke from the inner smoke exhaust ports 103.

[0066] Alternatively, if Figure 2 , 4 and Figure 6 As shown, the range hood also includes a partition 30, which is located in the smoke exhaust chamber 101, and the partition 30 is connected to the shell body 10, and the partition 30 and the shell body 10 enclose an air outlet chamber 301 with a vent 302; the external smoke exhaust port 104 is located on the top wall of the air outlet chamber 301, the internal smoke exhaust port 103 is located on the side wall of the air outlet chamber 301 and / or the top wall of the air outlet chamber 301, the vent 302 is located on the bottom wall of the air outlet chamber 301, and the vent 302 is communicated with the air outlet 204 of the fan 20.

[0067] In the disclosed embodiment, a partition 30 is provided in the housing 10, and the partition 30 separates the housing 10 into an air outlet chamber 301, and the air outlet chamber 301 is connected to the smoke outlet 104 and the inner smoke outlet 103, and the vent 302 of the air outlet chamber 301 is connected to the air outlet 204 of the fan 20, so that the fan 20 first drives the oil smoke to flow from the air outlet 204 of the fan 20 into the air outlet chamber 301, and then flows to the inner smoke outlet 103 and the outer smoke outlet 104 in the air outlet chamber 301. The provision of the air outlet chamber 301 allows the oil smoke to have a buffer space, so that the oil smoke can adjust the exhaust volume according to the exhaust resistance of the inner smoke outlet 103 and the exhaust resistance of the outer smoke outlet 104.

[0068] In the disclosed embodiment, the internal smoke exhaust port 103 can be arranged on the top wall of the air outlet cavity, or on the side wall. Any arrangement that can improve the smoke exhaust effect belongs to the optional embodiment of the present application.

[0069] Optionally, the fan 20 includes a volute 202 and an impeller 201, the volute 202 has an air inlet 203 and an air outlet 204, the air outlet 204 is located at the upper end of the volute 202; the impeller 201 rotates inside the volute 202; the partition 30 is connected to the volute 202, and the air outlet 204 matches the vent 302.

[0070] In the disclosed embodiment, the impeller 201 rotates and is located in the volute 202. The impeller 201 can drive the oil smoke to flow from the air inlet 203 to the air outlet 204, and then flow out of the fan 20 from the air outlet 204. The partition 30 is connected to the volute 202, and the air outlet 204 of the fan 20 matches the vent 302, so that the air flow flowing into the fan 20 can flow mostly or completely from the air outlet 204 into the vent 302, and then flow from the vent 302 into the air outlet cavity 301. The partition 30 is connected to the upper end of the volute 202, which can prevent the air flow of the air outlet 204 from leaking toward other parts of the housing 10, so as to ensure that the oil smoke in the housing 10 can flow completely or mostly from the inner smoke outlet 103 and the outer smoke outlet 104.

[0071] It should be noted that: the air outlet 204 matches the vent 302 , which means that the air outlet 204 and the vent 302 have the same or similar shapes and sizes.

[0072] Optionally, the purification device 40 is located in the air outlet cavity 301 , and the purification device 40 corresponds to the inner smoke exhaust port 103 , so that the oil smoke from the ventilation port 302 flows through the purification device 40 and then flows to the inner smoke exhaust port 103 .

[0073] In the disclosed embodiment, the purification device 40 is located in the air outlet cavity 301, and the purification device 40 corresponds to the inner smoke exhaust port 103, so that the airflow flowing into the air outlet cavity 301 from the air outlet 204 of the fan 20 passes through the purification device 40 and then flows out from the inner smoke exhaust port 103. This not only facilitates the setting of the purification device 40, but also ensures the purification effect of the oil smoke discharged from the inner smoke exhaust port 103.

[0074] Optionally, along the flow direction of the oil smoke, the projection of the purification device 40 on the inner smoke exhaust port 103 covers the inner smoke exhaust port 103 .

[0075] In the embodiment of the present disclosure, along the flow direction of the oil smoke, the projection of the purification device 40 on the inner smoke exhaust port 103 completely covers the inner smoke exhaust port 103, and the area of ​​the projection of the purification device 40 on the inner smoke exhaust port 103 is greater than or equal to the area of ​​the inner smoke exhaust port 103, so that it can be ensured that the airflow flowing out through the inner smoke exhaust port 103 can be purified by the purification device 40.

[0076] Alternatively, if Figure 5 As shown, the purification device 40 includes a first filter element 401, which is located between the ventilation port 302 and the inner smoke exhaust port 103, and one end of the first filter element 401 is connected to the inner edge of the outer smoke exhaust port 104 toward the inner smoke exhaust port 103; wherein, the other end of the first filter element 401 is connected to the outer edge of the ventilation port 302 toward the inner smoke exhaust port 103, or, the other end of the first filter element 401 is connected to the inner side wall of the volute 202 toward the inner smoke exhaust port 103.

[0077] In the disclosed embodiment, one end of the first filter element 401 is connected to the inner edge of the outer smoke outlet 104 toward the inner smoke outlet 103, so that the oil smoke flowing out through the outer smoke outlet 104 will not flow through the first filter element 401, so that the first filter element 401 only needs to purify and filter the oil smoke flowing toward the inner smoke outlet 103, thereby improving the service life of the first filter element 401. The other end of the first filter element 401 can be connected to the outer edge of the vent 302 toward the inner smoke outlet 103, that is, the other end of the first filter element 401 is connected to the partition 30, so that part of the oil smoke flowing out through the vent 302 does not need to flow through the purification device 40 and flows directly out of the outer smoke outlet 104, and the other part of the oil smoke must flow through the purification device 40 for purification and filtration before flowing to the inner smoke outlet 103, and then flows out from the inner smoke outlet 103.

[0078] The other end of the first filter element 401 is connected to the inner wall of the volute 202, that is, the first filter element 401 can extend into the volute 202, and the first filter element 401 is connected to the inner wall of the volute 202, which can improve the purification effect of the first filter element 401 on oil smoke.

[0079] Optionally, the purification device 40 further includes a second filter element 402 . The number of the second filter element 402 is one or more and the second filter element 402 is located between the first filter element 401 and the inner smoke exhaust port 103 .

[0080] In the disclosed embodiment, the purification device 40 is provided with a plurality of filters, and the plurality of filters can achieve multi-layer purification of oil smoke, thereby improving the purification effect of oil smoke.

[0081] Optionally, the first filter element 401 is a primary filter. The primary filter is made of a metal mesh or similar porous material, which can effectively capture oil droplets and particles with larger diameters, significantly reducing the grease and particles discharged into the atmosphere, and helping to meet environmental protection requirements. In addition, the primary filter helps to protect the more delicate second filter element 402 by removing larger pollutants, thereby extending the service life of the second filter element 402. In addition, the primary filter removes larger particles, which reduces the resistance to air flow, thereby reducing the energy consumption of the entire range hood.

[0082] Optionally, the second filter element 402 is an adsorbent material, and the second filter element 402 may be a lipophilic polymer composite material, for example, the second filter element 402 may be a sponge or a non-woven fabric, etc. This can absorb smaller particles and oil droplets in the fume and remove most of the fume odor.

[0083] Optionally, the second filter element 402 may also be a HEPA (High Efficiency Particulate Air) filter. The HEPA filter can remove very fine particles, further improving the air purification effect and protecting the health of indoor personnel.

[0084] Optionally, the second filter element 402 may be an electrostatic purifier. The electrostatic purifier uses corona discharge to charge the oil particles, and then attracts the charged oil particles to the collection plate through the electric field force, thereby achieving the separation of oil smoke. This method is very effective for submicron oil smoke particles.

[0085] Optionally, the number of the second filter element 402 is one or more. When the number of the second filter element 402 is one, the second filter element 402 can be of any type in the above-mentioned embodiments. When the number of the second filter element 402 is multiple, the types of the multiple second filter elements 402 can be the same or different. In practical applications, the type and number of the second filter element 402 can be set according to the use requirements.

[0086] Optionally, the partition 30 is detachably connected to the volute 202 .

[0087] In the disclosed embodiment, the partition 30 is detachably connected to the volute 202 , which facilitates the disassembly of the partition 30 or the volute 202 , so as to facilitate the inspection and cleaning of the fan 20 , and also facilitates the replacement and cleaning of the partition 30 .

[0088] Optionally, the partition plate 30 and the volute 202 may be detachably connected by means of screws or snap connections.

[0089] Optionally, when the other end of the first filter element 401 is connected to the outer edge of the vent 302 facing the inner smoke exhaust port 103, the outer edge of the vent 302 is recessed toward the direction of the fan 20 to form a mounting portion 303, and the outer edge of the volute 202 and the other end of the first filter element 401 are respectively abutted against two sides of the mounting portion 303, and the mounting portion 303 is connected to both the first filter element 401 and the volute 202.

[0090] In the disclosed embodiment, the outer edge of the volute 202 and the other end of the first filter element 401 are respectively abutted against the two sides of the mounting portion 303, and the mounting portion 303 is connected to the first filter element 401 and the volute 202, thereby further ensuring the connection stability of the first filter element 401, preventing the first filter element 401 from being deformed or detached due to the impact of airflow, and also improving the sealing between the volute 202 and the partition 30 to avoid air leakage.

[0091] Optionally, the mounting portion 303 is provided with a first screw hole, the outer edge of the air outlet 204 extends in the horizontal direction to form a first connecting plate, the first connecting plate is provided with a second screw hole, and the fastener passes through the first screw hole and the second screw hole to connect the partition 30 and the volute 202.

[0092] Optionally, a second connecting plate is provided at the other end of the first filter element 401, the second connecting plate extends in a horizontal direction, and the second connecting plate is adapted to the mounting portion 303, and the second connecting plate is provided with a third screw hole, and the fastener can simultaneously pass through the third screw hole, the first screw hole and the second screw hole to realize the connection between the first filter element 401, the volute 202 and the partition 30, and ensure the installation strength of the first filter element 401, and avoid air leakage at the air outlet 204.

[0093] Optionally, the number of the first screw holes is multiple, and the multiple first screw holes are arranged at intervals along the circumference of the vent 302, and the number of the second screw holes is the same as the number of the first screw holes and corresponds to each other. In this way, the connection strength between the partition 30 and the volute 202 can be improved. Optionally, the number of the third screw holes is the same as the number of the first screw holes and corresponds to each other, so as to improve the connection strength between the first filter element 401 and the partition 30.

[0094] Optionally, the purification device 40 is detachably connected to the cavity wall of the air outlet cavity 301 .

[0095] In the disclosed embodiment, the purification device 40 is detachably connected to the cavity wall of the air outlet cavity 301 , which facilitates the disassembly, cleaning and replacement of the purification device 40 .

[0096] Optionally, the purification device 40 can be connected to the cavity wall of the air outlet cavity 301 by screws or snap connections.

[0097] Optionally, the purification device 40 is detachably connected to the housing 10 and the partition 30 .

[0098] Optionally, the upper end of the first filter element 401 is connected to the top wall of the housing 10 by screws, and the lower end of the second filter element 402 is connected to the partition plate 30 or the volute 202 by screws.

[0099] Optionally, the upper end of the second filter element 402 is connected to the top wall of the housing 10 by screws, and the lower end of the second filter element 402 is connected to the partition plate 30 by screws.

[0100] Optionally, from top to bottom, the first filter element 401 is inclined toward the vent 302 , so that the airflow out of the vent 302 can flow through the first filter element 401 in time, avoiding the accumulation of impurities in the oil smoke on the partition 30 .

[0101] The above description and the accompanying 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 embodiments represent only possible variations. Unless explicitly 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 replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures 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

1. A range hood, characterized in that: include: The housing defines a smoke exhaust cavity having a smoking port, an inner smoke exhaust port and an outer smoke exhaust port, wherein the outer smoke exhaust port is connected to the outside or a public smoke duct, and the inner smoke exhaust port is connected to the room; The purification device is located in the smoke exhaust cavity and between the smoke inlet and the inner smoke exhaust port, and is used to purify the oil smoke flowing from the smoke inlet to the inner smoke exhaust port; A fan, the number of which is one, and the fan is located in the smoke exhaust chamber; The smoke intake port is connected to both the inner smoke exhaust port and the outer smoke exhaust port. When the fan is working, the fan can drive the oil smoke from the smoke intake port to be discharged through the inner smoke exhaust port and the outer smoke exhaust port at the same time.

2. The range hood according to claim 1, characterized in that: The fan has an air outlet, which is connected to both the inner smoke exhaust port and the outer smoke exhaust port, so that the oil smoke flowing out of the air outlet of the fan can flow to the inner smoke exhaust port and the outer smoke exhaust port at the same time; or, The fan has a plurality of air outlets, and at least two of the plurality of air outlets are respectively connected to the inner smoke exhaust port and the outer smoke exhaust port.

3. The range hood according to claim 1, characterized in that: The top wall of the shell is provided with an external smoke exhaust port, and at least one side wall of the shell is provided with an internal smoke exhaust port.

4. The range hood according to claim 1, characterized in that: The housing includes: A smoke collecting housing defines a smoke collecting cavity having a smoke inlet; A smoke exhaust housing defines a smoke exhaust channel, the smoke exhaust channel is connected to the smoke collecting chamber, the smoke exhaust chamber includes the smoke exhaust channel and the smoke collecting chamber, and the fan is located in the smoke exhaust channel; The top wall of the smoke exhaust shell is provided with an external smoke exhaust port, the side wall of the smoke exhaust shell is provided with an internal smoke exhaust port, and the top end of the internal smoke exhaust port is arranged close to the top wall of the smoke exhaust shell.

5. The range hood according to claim 1, characterized in that: Also includes: A partition is located in the smoke exhaust cavity, the partition is connected to the shell, and the partition and the shell enclose an air outlet cavity with a vent; The external smoke exhaust port is located at the top wall of the air outlet cavity, the internal smoke exhaust port is located at the side wall of the air outlet cavity and / or the side wall of the air outlet cavity, the ventilation port is located at the bottom wall of the air outlet cavity, and the ventilation port is connected to the air outlet of the fan.

6. The range hood according to claim 5, characterized in that the fan include: A volute having an air inlet and an air outlet; An impeller is rotatably disposed in the volute; The partition is connected to the volute, and the vent is matched with the outlet.

7. The range hood according to claim 6, characterized in that: The purification device is located in the air outlet cavity, and the purification device includes: A first filter element is located between the ventilation port and the inner smoke exhaust port, and one end of the first filter element is connected to the inner edge of the outer smoke exhaust port toward the inner smoke exhaust port; The other end of the first filter element is connected to the outer edge of the ventilation opening facing the inner smoke exhaust port, or the other end of the first filter element is connected to the inner side wall of the volute facing the inner smoke exhaust port.

8. The range hood according to claim 7, characterized in that: When the other end of the first filter element is connected to the outer edge of the vent facing the inner smoke exhaust port, the outer edge of the vent is recessed to form a mounting portion, the outer edge of the volute and the other end of the first filter element are respectively abutted against both sides of the mounting portion, and the mounting portion is connected to both the first filter element and the volute.

9. The range hood according to claim 7, characterized in that: The purification device also includes: The second filter element, which is one or more in number, is located between the first filter element and the inner smoke exhaust port.

10. The range hood according to any one of claims 5 to 9, characterized in that: The partition is detachably connected to the volute; and / or the purification device is detachably connected to the cavity wall of the air outlet cavity.

Images