Range hood head assembly and integrated cooker capable of reducing disturbance

Abstract

The utility model discloses an extractor hood head assembly and an integrated cooker capable of reducing disturbance. The extractor hood head assembly comprises a vertical air duct defined by a shell, a panel, a top plate or / and a smoke gathering plate, a left wind shield and a right wind shield, wherein the projection of the top plate or / and the smoke gathering plate in the horizontal direction exceeds the projection of the vertical air duct in the horizontal direction; the panel is provided with a narrow and long panel exhaust inlet which is horizontally arranged, and the panel exhaust inlet is communicated with the vertical air duct; compared with the prior art, the range hood head assembly has the advantages that air in the cooking environment can enter the negative pressure inlet area at the panel exhaust inlet from top to bottom from the upper part of the top plate and / or the smoke gathering plate under the action of negative pressure and flow towards the panel exhaust inlet, and the air in the cooking environment can also enter the negative pressure inlet area at the panel exhaust inlet under the action of negative pressure; and the oil smoke enters the negative pressure area from the outer edges of the left wind shield and the right wind shield and flows towards the panel exhaust inlet, so that a relatively good airflow organization can be formed, and the panel exhaust inlet is promoted to suck the oil smoke.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, and in particular to a range hood head assembly and an integrated stove capable of reducing disturbance. Background Art

[0002] The advantages of integrated stoves are that they make full use of space and are neat and beautiful. They have occupied the user market since they were created. However, through a large number of market surveys, it is found that the current integrated stoves still have some problems. Among the existing household side-suction range hood integrated stoves, the more advanced one is that a top plate is placed above the range hood, and the top plate and the back plate of the integrated stove form a guide device for the negative pressure of smoke extraction. Its effect is better than that of the old-fashioned side-suction range hood integrated stove without this device. However, there is no negative pressure interception device on both sides of the side-suction range hood integrated stove, and a considerable part of the negative pressure of the range hood is dispersed and lost from both sides under the top plate. Part of the oil smoke rising near the sides of the side-suction range hood integrated stove cannot be effectively controlled and discharged, forming pollution in the kitchen, which affects both indoor hygiene and human health. Utility Model Content

[0003] The purpose of the utility model is to provide a range hood head assembly and an integrated stove with reduced disturbance, which are used to solve the above-mentioned technical problems.

[0004] A range hood head assembly, used for an integrated stove, comprising:

[0005] A vertical air duct surrounded by the shell;

[0006] The panel has a horizontally arranged narrow and long panel air suction port, and the panel air suction port is connected to the vertical air duct;

[0007] The horizontal projection exceeds the top plate or / and smoke collecting plate of the vertical air duct in the horizontal projection;

[0008] Left side wind deflector and right side wind deflector;

[0009] When the integrated stove is running, a negative pressure zone is formed on the outside of the panel air intake port along the length direction of the panel air intake port, and air enters the panel air intake port from top to bottom from the top plate or the smoke collecting plate; air enters the panel air intake port from the left wind shield and the outer edge of the right wind shield.

[0010] According to one embodiment of the utility model, the top plate has a top cover and side walls, and a detection through hole is arranged on the top cover and / or the side wall. An air detection device is arranged in the top plate, and the air detection device has an outer shell, and a detection air inlet and a detection air exhaust are formed on the outer shell. The outer shell has a one-way air duct flowing from the detection air inlet to the detection air exhaust port, and a detection draft fan is arranged in the one-way air duct. The detection draft fan is used to form a one-way airflow from the detection air inlet to the detection air exhaust port. After the detection draft fan is turned on, the air entering from the detection through hole enters the detection air inlet.

[0011] According to one embodiment of the utility model, a display device for displaying the PM2.5 value is provided on the front of the top plate, and the display device and the air detection device are both connected to the main controller of the integrated stove. The main controller controls the smoke exhaust fan of the integrated stove to actively turn on, delay closing or adjust the speed according to the value detected by the air detection device; the main controller controls the display device to display accordingly according to the value detected by the air detection device.

[0012] According to one embodiment of the utility model, the left wind shield plate and the right wind shield plate extend in the vertical direction, and form a detachable structure with the shell on the side facing the shell, and the detachable structure forms a sealed connection structure at the connection between the left wind shield plate and the right wind shield plate facing the shell; the lower parts of the left wind shield plate and the right wind shield plate have arc-shaped edges, and their widths gradually decrease; the distance between the lower edges of the left wind shield plate and the right wind shield plate and the countertop of the integrated stove is 5 to 18 cm.

[0013] According to one embodiment of the utility model, the projection length of the top plate in the horizontal direction is 1.8 to 4 times the projection length of the vertical air duct in the horizontal direction; a wind curtain fan is arranged in the top plate, and a wind curtain outlet is formed on the lower surface of the top plate that exceeds the vertical air duct in the horizontal direction, and the wind curtain fan discharges air downward through the wind curtain outlet to form a wind curtain, or / and a lighting device is formed on the lower surface of the top plate that exceeds the vertical air duct in the horizontal direction.

[0014] According to one embodiment of the utility model, the smoke collecting plate is arranged parallel to the air suction port of the panel, and the smoke collecting plate forms an angle α with the horizontal plane, wherein the angle range of α is -15°<α<15°, the smoke collecting plate has a support, and the smoke collecting plate extends toward the user side, and the projection length of the smoke collecting plate in the horizontal direction is 0.8 to 2.5 times the projection length of the vertical air duct in the horizontal direction, and a narrow slit is formed between the side of the smoke collecting plate facing the shell and the shell, and the size of the narrow slit is in the range of 0.1 cm to 1.5 cm.

[0015] According to one embodiment of the utility model, the top plate has a top cover and side walls, detection holes are arranged on the top cover and / or the side walls, an air detection device is arranged in the top plate, and a narrow gap formed between the side of the smoke collecting plate facing the shell and the shell has a return flow flowing to the negative pressure zone; the return flow comes from the air flowing in from the upper side of the top cover of the top plate; and / or the return flow comes from the air escaping upward from the side of the smoke collecting plate facing the user.

[0016] An integrated stove that reduces disturbances includes the above-mentioned range hood head assembly and a cabinet. The range hood head assembly is used to connect to the cabinet. The range hood head assembly has a horizontally arranged connecting surface, and the connecting surface is detachably connected to the corresponding surface of the cabinet. The vertical air duct is connected to the cabinet air inlet of the corresponding surface through the air duct exhaust port arranged on the connecting surface, and is connected to the air collecting chamber in the cabinet.

[0017] According to one embodiment of the utility model, the panel air suction port is connected to the vertical air duct with an expanded air duct area, the inner wall surface of the vertical air duct is smooth, the ratio of the horizontal cross-section of the panel air suction port to the vertical air duct is 0.2 to 0.6, and an air duct expansion structure is formed after entering the panel air suction port; an air duct exhaust port is provided at the lower end of the vertical air duct, the ratio of the horizontal cross-section of the air duct exhaust port to the vertical air duct is 0.2-0.5, and a air duct contraction structure is formed after entering the air duct exhaust port.

[0018] According to one embodiment of the utility model, the ratio of the horizontal cross-section of the panel air suction port to the vertical air duct is greater than or equal to 0.2 and less than or equal to 0.4, and the distance from the center of the panel air suction port to the countertop of the integrated stove is 32 cm to 45 cm; the suction speed of the panel air suction port is 6 m / s to 12 m / s; or the ratio of the horizontal cross-section of the panel air suction port to the vertical air duct is greater than 0.4 and less than or equal to 0.6, and the distance from the center of the panel air suction port to the countertop of the integrated stove is 26 cm to 35 cm; the suction speed of the panel air suction port is 4 m / s to 7 m / s.

[0019] Compared with the prior art, the range hood head assembly of the utility model has the following advantages:

[0020] With the range hood head assembly of the utility model, the air in the cooking environment will also enter the negative pressure zone at the air intake port of the panel from top to bottom under the action of negative pressure from above the top plate and / or the smoke collecting plate, and flow toward the air intake port of the panel. The air in the cooking environment will also enter the negative pressure zone from the outer edges of the left wind shield plate and the right wind shield plate under the action of negative pressure, and flow toward the air intake port of the panel. This can not only prevent the oil smoke generated during the cooking process from escaping to the sides and the top of the panel to avoid polluting the air in the cooking environment, but also form a better airflow organization to promote the suction of oil smoke by the air intake port of the panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an integrated stove with a range hood head assembly having a top plate;

[0022] Figure 2 It is a structural schematic diagram of an integrated stove in which a range hood head assembly has a smoke collecting plate;

[0023] Figure 3 for Figure 2 Cross-section view in the AA direction;

[0024] Figure 4 The schematic diagram of the structure of an integrated stove in which a range hood head assembly has a top plate and a smoke collecting plate;

[0025] Figure 5 Another structural schematic diagram of an integrated stove in which a range hood head assembly has a top plate and a smoke collecting plate;

[0026] In the figure: 1. Shell, 11. Air grille, 2. Panel, 21. Panel air intake, 3. Top plate, 31. Detection hole, 32. Air curtain air outlet, 33. Air curtain fan, 4. Wind plate, 41. Support, 5. Left wind shield, 6. Right wind shield, 7. Air detection device, 8. Display device, 9. Cabinet, 91. Corresponding surface

[0027] The realization of the functions and advantages of the utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0032] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The utility model discloses a range hood head assembly, which is used for an integrated stove, and comprises a vertical air duct surrounded by a shell 1, a panel 2, a top plate 3 and / or a smoke collecting plate 4, a left wind shield 5 and a right wind shield 6; the panel 2 is provided with a horizontally arranged narrow and long panel air suction port 21, and the panel air suction port 21 is connected to the vertical air duct; the horizontal projections of the top plate 3 and the smoke collecting plate 4 exceed the horizontal projections of the vertical air duct, and the left wind shield 5 and the right wind shield 6 are respectively arranged on the left and right sides of the panel 2; when the integrated stove is running, a negative pressure zone is formed on the outer side of the panel air suction port 21 along the length direction of the panel air suction port 21, and air enters the panel air suction port 21 from the top plate 3 or the smoke collecting plate 4 from top to bottom; air enters the panel air suction port 21 from the outer edges of the left wind shield 5 and the right wind shield 6. In the range hood head assembly of the present invention, the panel air suction port 21 is a narrow and long air suction port, and the panel air suction port 21 is arranged along the length direction of the panel 2, that is, the panel air suction port 21 extends from the left and right sides of the panel 2 to the right side of the panel 2, and the width of the panel air suction port 21 is much smaller than its length. It should be understood that if the panel 2 is taken as a reference, the width of the panel air suction port 21 refers to the range occupied by the panel air suction port 21 in the height direction of the panel 2, that is, the range occupied from top to bottom on the panel 2; the length of the panel air suction port 21 refers to the range occupied by the panel air suction port 21 in the width direction of the panel 2, that is, the range occupied from left to right on the panel 2; when the range hood head assembly is applied to the integrated stove, the negative pressure formed at the narrow and long panel air suction port 21 is relatively large, and the oil fume suction effect is better; in addition, since a top plate is provided above the panel 2 3 and at least one of the smoke collecting plates 4, and the left and right sides of the panel 2 are respectively provided with a left wind shield 5 and a right wind shield 6, so that when the user is cooking, the oil smoke generated in the cooking process will flow to the narrow and long panel air intake port 21, and after the oil smoke is sucked by the panel air intake port 21, a negative pressure zone is formed at the panel air intake port 21, and the air of the cooking environment will also enter the negative pressure zone from top to bottom from above the top plate 3 and / or the smoke collecting plate 4 under the action of the negative pressure, and flow to the panel air intake port 21, and the air of the cooking environment will also enter the negative pressure zone from the outer edges of the left wind shield 5 and the right wind shield 6 under the action of the negative pressure, and flow to the panel air intake port 21, which can not only prevent the oil smoke generated in the cooking process from escaping to the two sides and the top of the panel 2 to avoid polluting the air of the cooking environment, but also form a better airflow organization to promote the panel air intake port 21 to suck the oil smoke.

[0033] In the range hood head assembly of the present invention, the ratio of the length to the width of the panel air intake port 21 is 15 to 30; the panel air intake port 21 is horizontally arranged, and the left and right ends are right-angled rectangles or arcs; the panel air intake port 21 is symmetrically arranged with its center as the symmetry point, and the total length of the panel air intake port 21 is 60% to 100% of the distance between the left and right sides of the panel 2. Similarly, the width of the panel air intake 21 is the range occupied by the panel air intake 21 along the height direction of the panel 2, and the length of the panel air intake 21 refers to the range occupied by the panel air intake 21 along the width direction of the panel 2. The ratio of the length and width of the panel air intake 21 is 15 to 30, which means that the width of the panel air intake 21 is much smaller than its length. The panel air intake 21 is narrow and long, so that the panel air intake 21 will form a large negative pressure under the action of the smoke exhaust fan, and the suction effect of the oil fume is better. In addition, the panel air intake 21 is symmetrically arranged with its center as the symmetry point, which means that the panel air intake 21 is symmetrical in the width direction of the panel 2. In this way, when the user is cooking, the panel air intake 21 is symmetrical. The suction force on oil smoke remains consistent in the length direction of the panel suction port 21, and the oil smoke will not be offset due to the different suction forces at the panel suction port 21; in order to make the range hood head assembly have a better suction effect on oil smoke and a sufficiently large suction range, the length of the panel suction port 21 should be large enough, so that the total length of the panel suction port 21 is 60% to 100% of the distance between the left and right sides of the panel 2, which means that the length of the panel suction port 21 is at least 60% to 100% of the width of the panel 2, so that when the user is cooking, the oil smoke in the cooking space facing the panel 2 can flow toward the panel suction port 21 under the action of the panel suction port 21 and be sucked by the panel suction port 21.

[0034] It should be understood that the range hood head assembly may have either the top plate 3 or the smoke collecting plate 4 , or may have both the top plate 3 and the smoke collecting plate 4 . When there is only a top plate 3 or a smoke collecting plate 4, the projection of the top plate 3 or the smoke collecting plate 4 onto the horizontal plane exceeds the projection of the vertical air duct onto the horizontal plane, that is to say, if the side of the vertical air duct away from the user is taken as the reference plane, the distance between the end of the projection of the vertical air duct in the horizontal direction close to the user and the user is smaller than the distance between the end of the projection of the top plate 3 or the smoke collecting plate 4 in the horizontal direction close to the user and the user; to be more specific, if the side of the vertical air duct away from the user is called the inner side, and the side of the vertical air duct close to the user is called the outer side, the width of the projection of the vertical air duct onto the horizontal plane from the inside to the outside is smaller than the width of the projection of the top plate 3 or the smoke collecting plate 4 onto the horizontal plane from the inside to the outside; this is equivalent to the top plate 3 and the smoke collecting plate 4 extending a certain length from the outer side of the panel 2 to the user side, so that the top plate 3 and the smoke collecting plate 4 can block the oil smoke that passes through the panel air intake port 21 and directly flows upward along the panel 2, thereby playing a role in blocking the overflow of oil smoke. When the range hood head assembly has both the top plate 3 and the smoke collecting plate 4, the distance from the outer side of the projection of the vertical air duct to the horizontal plane to the user is less than the distance from the outer side of the projection of the smoke collecting plate 4 to the horizontal plane to the user, and the distance from the outer side of the projection of the smoke collecting plate 4 to the horizontal plane to the user is less than or equal to the distance from the outer side of the projection of the smoke collecting plate 4 to the user. In this way, when the oil smoke that passes through the panel air intake port 21 flows upward along the panel 2 to the smoke collecting plate 4, it will be blocked by the smoke collecting plate 4; part of the oil smoke that overflows from the smoke collecting plate 4 or the oil smoke that rises higher than the smoke collecting plate 4 will be blocked again by the top plate 3, and the oil smoke overflow is reduced layer by layer, which can prevent the oil smoke from polluting the air in the cooking environment and ensure the quality of the air inhaled by the user.

[0035] See also Figure 1In an embodiment of a range hood head assembly having only a top plate 3, the top plate 3 has a top cover and side walls, and a detection through hole 31 is provided on the top cover and / or the side wall. An air detection device 7 is provided in the top plate 3, and the air detection device 7 has a shell, and a detection air inlet and a detection air exhaust are formed on the shell. The shell has a one-way air duct flowing from the detection air inlet to the detection air exhaust, and a detection draft fan is provided in the one-way air duct. The detection draft fan is used to form a one-way airflow from the detection air inlet to the detection air exhaust. After the detection draft fan is turned on, the air entering from the detection through hole 31 enters the detection air inlet. When the user is cooking, the oil smoke generated by cooking flows toward the panel air intake port 21, and the top plate 3 and / or the smoke collecting plate 4, the left wind shield 5 and the right wind shield 6 prevent the smoke from overflowing. At the same time, the air of the cooking environment enters the panel air intake port 21 from the top plate 3 from top to bottom, and the air of the cooking environment enters the panel air intake port 21 from the outer edges of the left wind shield 5 and the right wind shield 6, so that the air conditioner in the cooking environment is filled with air in the negative pressure area formed by the oil smoke sucked by the panel air intake port 21; while the panel air intake port 21 sucks the oil smoke, the detection induced draft fan is started, and the air of the cooking environment enters the air detection device 7 in the top plate 3 through the detection through hole 31. When the detection induced draft fan sucks the air of the cooking environment into the air detection device 7, the air enters the one-way air duct from the detection air inlet, is detected in the process of flowing along the one-way air duct, and is finally discharged from the detection exhaust port. Since the detection hole 31 is arranged on the top plate 3 having a top cover and / or a side wall, the air above the top cover 32 and the air on both sides of the side wall are the air after the oil smoke is blocked by the top plate 3, the left wind shield 5 and the right wind shield 6. The air quality of this part represents the air quality of the cooking environment. The detection fan introduces and detects air from the top of the top plate 3 or the outside of the left wind shield 5 and the right wind shield 6, which can accurately reflect the air quality of the cooking environment.

[0036] See also Figure 1In an embodiment of a range hood head assembly having only a top plate 3, a display device 8 for displaying a PM2.5 value is provided on the front of the top plate 3. The display device 8 and the air detection device 7 are both connected to a main controller of the integrated stove. The main controller controls the exhaust fan of the integrated stove to actively turn on, delay shutoff, or adjust the speed according to the value detected by the air detection device 7; the main controller controls the display device 8 to display accordingly according to the value detected by the air detection device 7. When the user is cooking, the main controller of the integrated stove controls the operation of the smoke exhaust fan of the integrated stove. The oil smoke generated during the cooking process begins to flow toward the panel air intake 21, and enters the vertical air duct through the panel air intake 21, and is then discharged under the action of the smoke exhaust fan. When the smoke exhaust fan starts and the panel air intake 21 sucks the oil smoke, the air detection device 7 starts, the draft fan 72 starts, and the air enters the top plate 3 through the detection through hole 31, and then enters the one-way air duct of the air detection device 7 through the detection air inlet, and flows along the one-way air duct. It is detected during the flow, and the detected air is discharged through the detection exhaust port of the air detection device 7. When the air is detected, the main controller controls the display device 8 to display the PM2.5 value detected by the air detection device 7. At the same time, the main controller controls the smoke exhaust fan of the integrated stove to actively turn on, delay closing or adjust the speed according to the PM2.5 value detected by the air detection device 7. When the PM2.5 value detected by the air detection device 7 is less than or greater than the standard value, the main controller adjusts the speed of the exhaust fan of the integrated stove. For example, when the PM2.5 value is less than the standard value, the main controller adjusts the speed of the exhaust fan of the integrated stove to reduce the speed to avoid wasting the power of the exhaust fan. When the PM2.5 value is greater than the standard value, the main controller adjusts the speed of the exhaust fan of the integrated stove to increase the speed to avoid incomplete extraction of oil smoke. When the user finishes the cooking operation, if the PM2.5 value detected by the air detection device 7 is still higher than the standard value, the main controller controls the exhaust fan of the integrated stove to delay shutting down. Under the control of the main controller, the exhaust fan will neither incompletely extract the oil smoke nor waste power.

[0037] See also Figure 1In an embodiment of the range hood head assembly having only a top plate, a projection length of the top plate 3 in the horizontal direction is 1.8 to 4 times a projection length of the vertical air duct in the horizontal direction; an air curtain fan 33 is arranged in the top plate 3, and an air curtain outlet 32 ​​is formed on a portion of the lower surface of the top plate 3 that exceeds the vertical air duct in the horizontal direction, and the air curtain fan 33 discharges air downward through the air curtain outlet 32 ​​to form an air curtain, or / and an illumination device is formed on a portion of the lower surface of the top plate 3 that exceeds the vertical air duct in the horizontal direction. When the integrated stove is working, the main controller controls the smoke exhaust fan to start, and the oil smoke flows toward the panel air intake port 21 under the action of the smoke exhaust fan. In the process of the oil smoke entering the panel air intake port 21, part of the oil smoke will pass over the panel air intake port 21 and flow upward along the part of the panel 2 located above the panel air intake port 21, and then when it flows to the top plate 3, it will flow along the top plate 3. A wind curtain outlet 32 ​​is set on the lower surface of the part of the top plate 3 that exceeds the vertical air duct in the horizontal direction, that is, the part of the top plate 3 extending to the user side. When the integrated stove is working, the wind discharged from the wind curtain outlet 32 ​​forms a wind curtain, which can prevent the oil smoke flowing toward the panel air intake port 21 from escaping outward, and the oil smoke that passes the panel air intake port 21 and flows upward along the panel 2 will flow along the panel 2 to the top plate 3, and when it flows to the wind curtain outlet 32, it will be blocked by the wind curtain outlet, and then flow back and flow toward the panel air intake port 21. In addition, when the oil smoke flows toward the panel air intake port 21, the part of the cyclonic surface formed by the oil smoke that escapes will also be blocked by the wind curtain when encountering the wind curtain, so as to avoid spreading to the user side, thereby preventing the user from inhaling the oil smoke. During the cooking process, if the brightness of the cooking environment is not enough, a lighting device is formed on the lower surface of the top plate 3 that exceeds the vertical air duct in the horizontal direction. The main controller can start the lighting device to illuminate the user, so that the user can check the status of the cooked food.

[0038] See also Figure 2In an embodiment of a range hood head assembly having only a smoke collecting plate, the smoke collecting plate 4 is arranged parallel to the panel air intake port 21, and the smoke collecting plate 4 forms an angle α with the horizontal plane, wherein the angle α ranges from -15°<a<15°, the smoke collecting plate 4 has a support member 41, and the smoke collecting plate 4 extends toward the user side, and the projection length of the smoke collecting plate 4 in the horizontal direction is 0.8 to 2.5 times the projection length of the vertical air duct in the horizontal direction, and a narrow slit is formed between the side of the smoke collecting plate 4 facing the shell 1 and the shell 1, and the size of the narrow slit is in the range of 0.1 cm to 1.5 cm. It should be understood that the length of the smoke collecting plate 4 is calculated from the side of the panel 2 facing the user, while the length of the top plate 3 is calculated from the side of the shell 1 away from the user. Therefore, if the top plate 3 is to extend to the front side of the panel 2 and extend to the user side, the width of the projection of the top plate 3 to the horizontal plane must be greater than the width of the projection of the vertical air duct on the horizontal plane, while the width of the projection of the smoke collecting plate 4 to the horizontal plane does not have to be greater than the width of the projection of the vertical air duct on the horizontal plane, so that the smoke collecting plate 4 can extend from the front side of the panel 2 to the user side and prevent the smoke from overflowing upward when the integrated stove is started. When the range hood head assembly is applied to the integrated stove, when the integrated stove is working and sucking oil smoke, the smoke exhaust fan of the integrated stove drives and causes the oil smoke to flow toward the panel air intake port 21, and the oil smoke escaping from the smoke collecting plate 4 will flow upward from the side of the smoke collecting plate 4 facing the user to the top of the smoke collecting plate 4. Due to the negative pressure at the panel air intake port 21, the oil smoke flowing above the smoke collecting plate 4 will flow toward the panel air intake port 21 again from the gap between the smoke collecting plate 4 and the shell 1. Therefore, there is an airflow flowing downward at the narrow gap between the side of the smoke collecting plate 4 facing the shell body 1 and the shell body 1, and the flow rate of the airflow is determined by the width of the narrow gap. The smaller the width of the narrow gap is, the greater the flow rate of the airflow will be after the airflow passes through the narrow gap from above the smoke collecting plate 4. The larger the width of the narrow gap is, the smaller the flow rate of the airflow will be after the airflow passes through the narrow gap from above the smoke collecting plate 4. The airflow has a larger flow rate after passing through the narrow gap from above the smoke collecting plate 4, and can impact downward the escaping oil smoke that passes through the panel air intake port 21 and flows upward along the panel 2, and these escaped oil smoke The oil smoke forms a return flow that flows toward the panel air intake port 21. If the flow rate of the airflow after passing through the narrow slit above the smoke collecting plate 4 is too small, the oil smoke that has escaped over the panel air intake port 21 and flows upward along the panel 2 will be engulfed and continue to flow upward and escape. Therefore, the width of the narrow slit cannot be too large. The size of the narrow slit is in the range of 0.1 cm to 1.5 cm to ensure that the impact of the flow rate of the airflow after passing through the narrow slit above the smoke collecting plate 4 will engulf the oil smoke that has escaped over the panel air intake port 21 and flows upward along the panel 2 to form a return flow that flows toward the panel air intake port 21.The smoke collecting plate 4 is parallel to the panel air inlet 21, which means that the distance from any point on the side of the smoke collecting plate 4 facing the panel to the panel 2 is equal, so that the size of the narrow slit formed between the side of the smoke collecting plate 4 facing the shell 1 and the shell 1 is consistent. When the air above the smoke collecting plate 4 flows to the bottom of the smoke collecting plate 4 through the narrow slit, the negative pressure of the narrow slit is the same, and the speed of the airflow flowing through the narrow slit is the same. The smoke collecting plate 4 has a support 41, which is connected to the side of the smoke collecting plate 4 close to the shell 1 and can make the smoke collecting plate 4 rotate. When the user is cooking, the support member 41 makes the smoke collecting plate 4 form an angle of -15° to 15° with the horizontal plane to block the smoke flowing upward. When the angle α is -15°<α<0°, the height of the end of the smoke collecting plate 4 close to the user is lower than the height of the end of the smoke collecting plate 4 close to the shell 1, and the smoke collecting plate 4 is inclined downward from the end close to the shell 1 to the end close to the user; when the angle a is 0°, the smoke collecting plate 4 is horizontally arranged, and when the angle α is 0°<α<15°, the height of the end of the smoke collecting plate 4 close to the user is higher than the height of the end of the smoke collecting plate 4 close to the shell 1, and the smoke collecting plate 4 is inclined upward from the end close to the shell 1 to the end close to the user; the support member 41 has a retraction function. When cooking is finished, the support member 41 first sets the smoke collecting plate 4 vertically and keeps it parallel to the panel 2, and then the support member retracts toward the vertical air duct and makes the smoke collecting plate 4 close to the panel 2; the smoke collecting plate 4 can be folded up after the user finishes cooking to save space in the cooking environment and make the cooking environment simple.

[0039] See also Figure 2 In the embodiment of the range hood head assembly having only a smoke collecting plate, the smoke collecting plate 4 is provided with an air curtain duct, the air detection device 7 and the air curtain fan 33 are both arranged in the air curtain duct in the smoke collecting plate 4, the left and right sides or the top of the smoke collecting plate 4 are provided with detection through holes 31, and the lower surface of the smoke collecting plate 4 is provided with an air curtain air outlet 32. When the range hood head assembly is used on an integrated stove, when the exhaust fan of the integrated stove is started, the air detection device 7 and the air curtain fan 33 are started, and the air curtain fan 33 sucks air in the air curtain duct of the smoke collecting plate 4. The air is discharged downwardly through the wind curtain outlet 32, so that negative pressure is formed in the wind curtain duct. The air on the top of the smoke collecting plate 4 enters the wind curtain duct through the detection through hole 31, and then enters the detection draft fan of the air detection device 7 to start. The air in the wind curtain duct enters the shell 71 through the detection air inlet on the shell 71 and is then discharged from the detection exhaust port by the detection draft fan; at the same time, the airflow in the wind curtain duct is discharged downwardly through the wind curtain outlet 32 ​​by the wind curtain fan 33 to form a wind curtain, which can block the escape of oil smoke flowing toward the panel air intake port 21.

[0040] In an embodiment of a range hood head assembly having only a smoke collecting plate, the projection length of the smoke collecting plate 4 in the horizontal direction is 0.8 to 2.5 times the projection length of the vertical air duct in the horizontal direction. If there is an air curtain fan 33 in the smoke collecting plate 4, and the smoke collecting plate 4 forms an angle α with the horizontal plane, wherein the angle range of α is -15°<a<15°, when the following relationship is satisfied: when the smoke collecting plate 4 is tilted in the working state and the height of the side of the smoke collecting plate 4 facing the user is higher than the height of the side facing the housing 1, the air curtain formed by the airflow discharged by the air curtain fan 33 through the air curtain vent 32 is tilted toward the user side, and at this time, the air curtain and The range defined by the shell 1 is relatively large. During the cooking process of the user, the polluted air generated by the combustion of the stove will be blocked by the wind curtain when escaping outward; when the smoke collecting plate 4 is tilted in the working state and the height of the side of the smoke collecting plate 4 facing the user is lower than the height of the side facing the shell 1, the wind curtain formed by the airflow discharged by the wind curtain fan 33 through the wind curtain air outlet 32 ​​is tilted toward the side where the shell 1 is located. At this time, the range defined by the wind curtain and the shell 1 is relatively small, and the bottom of the wind curtain goes straight to the tail of the airflow formed by the oil smoke generated by cooking. In the process of the oil smoke being formed and starting to flow upward, the wind curtain begins to block the escaping oil smoke. Because the direction of the wind curtain is always perpendicular to the lower surface of the smoke collecting plate 4, when the smoke collecting plate 4 is tilted in the working state and the height of the side of the smoke collecting plate 4 facing the user is lower than the height of the side facing the shell 1, the wind curtain formed by the airflow discharged from the wind curtain fan 33 through the wind curtain air outlet 32 ​​is tilted toward the side where the shell 1 is located. In the triangular prism formed by the shell 1, the smoke collecting plate 4 and the plane where the wind curtain is located, the length from the side of the smoke collecting plate 4 facing the shell 1 to the side facing the user is fixed. The larger the angle formed by the smoke collecting plate 4 and the vertical direction or the shell 1, the closer the plane where the wind curtain is located is to the side where the shell 1 is located. The lower the position of the plane angle ruler, the lower the position of the bottom of the wind curtain against the airflow generated by cooking, and the easier it is to block the escape of polluted air; when the smoke collecting plate 4 is tilted in the working state and the height of the side of the smoke collecting plate 4 facing the user is higher than the height of the side facing the shell 1, the air curtain formed by the airflow discharged by the air curtain fan 33 through the air curtain vent 32 is tilted toward the side where the user is located, and the larger the angle formed by the smoke collecting plate 4 and the vertical direction or the shell 1, the farther the bottom of the wind curtain is from the airflow generated by the user's cooking. When the distance is too far, it will lose the blocking effect on the escaping smoke. Therefore, the head assembly with a fan of the utility model, in the working state, rotates the driving device 3 so that the smoke collecting plate 4 forms an angle of 90 degrees to 60 degrees with the vertical direction. The state of the angle of 90 degrees means that in the working state, the smoke collecting plate 4 is perpendicular to the shell 1, and the angle is less than 90 degrees and greater than 60 degrees, so that the height of the side of the smoke collecting plate 4 facing the user can be higher than the side facing the shell 1, or lower than the side facing the shell 1.Generally speaking, the length of the cigarette collecting plate 4 is the distance from the side of the cigarette collecting plate 4 facing the shell 1 to the side facing the user. The larger the length of the cigarette collecting plate 4 is, the height of the side facing the user is lower than the height of the side facing the shell 1 when the cigarette collecting plate 4 is in working state. When the length of the cigarette collecting plate 4 is smaller, the height of the side facing the user is higher than the height of the side facing the shell 1 when the cigarette collecting plate 4 is in working state.

[0041] See also Figure 4 and Figure 5 In some embodiments, the range hood head assembly has both a top plate 3 and a smoke collecting plate 4. The top plate 3 has a top cover and side walls, and a detection through hole 31 is provided on the top cover and / or the side wall. An air detection device 7 is provided in the top plate 3. A narrow gap formed between the side of the smoke collecting plate 4 facing the shell 1 and the shell 1 has a return flow flowing to the negative pressure zone; the return flow comes from the air flowing in from the upper side of the top cover of the top plate 3; and / or the return flow comes from the air escaping upward from the side of the smoke collecting plate 4 facing the user. In the range hood head assembly having both the top plate 3 and the smoke collecting plate 4, the length of the top plate 3 extending beyond the shell 1 toward the user is greater than the length of the smoke collecting plate 4. If the range hood head assembly does not have the air curtain fan 33, when the user is cooking, the oil smoke generated by cooking flows toward the panel air intake 21, and part of the oil smoke escapes in the process of flowing toward the panel air intake 21, and part of the oil smoke passes through the panel air intake 21 and continues to move upward and escapes from the smoke collecting plate 4. However, since a negative pressure zone is formed at the panel air intake 21, the air above the top plate 3 will enter the panel air intake 21 from the top plate 3 from top to bottom and form a return flow. The oil smoke escaping from the smoke collecting plate 4 will also enter between the top plate 3 and the smoke collecting plate 4 in the process of flowing upward, and flow with the return flow from the smoke collecting plate 4 toward the side of the shell 1 and the narrow gap between the shell 1 and the smoke collecting plate 4 to the negative pressure zone.

[0042] See also Figure 4In other embodiments, the range hood head assembly has both a top plate 3 and a smoke collecting plate 4. The top plate 3 has a top cover and side walls, and a detection through hole 31 is provided on the top cover and / or the side wall. An air detection device 7 is provided in the top plate 3. A narrow gap formed between the side of the smoke collecting plate 4 facing the shell 1 and the shell 1 has a return flow flowing to the negative pressure zone; the return flow comes from the air escaping upward from the side of the smoke collecting plate 4 facing the user. In the range hood head assembly having both the top plate 3 and the smoke collecting plate 4, the length of the top plate 3 extending beyond the shell 1 toward the user is greater than the length of the smoke collecting plate 4. If the range hood head has an air curtain fan 33, when the user is cooking, the oil smoke generated by cooking flows toward the panel air intake 21, and part of the oil smoke escapes in the process of flowing toward the panel air intake 21, and part of the oil smoke passes through the panel air intake 21 and continues to move upward and escapes from the smoke collecting plate 4. However, since a negative pressure zone is formed at the panel air intake 21 and there is an air curtain blocking the user side, the oil smoke escaping from the smoke collecting plate 4 will pass over the smoke collecting plate 4 in the process of flowing upward, and then enter between the top plate 3 and the smoke collecting plate 4, and flow with the return flow from the smoke collecting plate 4 toward the side of the shell 1 and the narrow gap between the shell 1 to the negative pressure zone.

[0043] See also Figure 5 In some other embodiments, the range hood head assembly has both a top plate 3 and a smoke collecting plate 4; the top plate 3 has a top cover and side walls, a detection through hole 31 is provided on the top cover and / or the side walls, an air detection device 7 is provided in the top plate 3, and a narrow slit formed between the side of the smoke collecting plate 4 facing the shell 1 and the shell 1 has a return flow flowing to the negative pressure zone; the return flow comes from the air flowing in from the upper side of the top cover of the top plate 3. In the range hood head assembly having both the top plate 3 and the smoke collecting plate 4, the length of the top plate 3 extending beyond the shell 1 toward the user is less than the length of the smoke collecting plate 4. If the range hood head assembly has an air curtain fan 33 arranged in the smoke collecting plate 4, when the user is cooking, the oil smoke generated by cooking flows toward the panel air intake port 21, and part of the oil smoke escapes in the process of flowing toward the panel air intake port 21. The escaped oil smoke will be blocked by the air curtain and cannot continue to escape upward. However, since a negative pressure area is formed at the panel air intake port 21, the air above the top plate 3 will enter from above the top plate 3 into the narrow gap formed between the side of the smoke collecting plate 4 facing the shell 1 and the shell 1, and then pass through the narrow gap to enter the panel air intake port 21 from top to bottom to form a return flow.

[0044] See also Figure 1 , Figure 2 , Figure 4 and Figure 5In the range hood head assembly of the utility model, the left wind shield plate 5 and the right wind shield plate 6 extend in the vertical direction, and form a detachable structure with the shell 1 on the side facing the shell 1, so that the connection between the left wind shield plate 5 and the right wind shield plate 6 and the shell 1 on the side facing the shell 1 forms a sealed connection structure; the lower parts of the left wind shield plate 5 and the right wind shield plate 6 have arc-shaped edges, and their widths gradually decrease; the distance between the lower edges of the left wind shield plate 5 and the right wind shield plate 6 and the countertop of the integrated stove is 5 to 18 cm. The side of the left wind shield 5 and the right wind shield 6 close to the shell 1 is called the inner side, and the side facing the user or away from the shell 1 is called the outer side. The lower edges of the left wind shield 5 and the right wind shield 6 are arc-shaped, and the distance from the lower edges of the left wind shield 5 and the right wind shield 6 to the countertop of the integrated stove gradually decreases from the inside to the outside, and the minimum distance from the countertop of the integrated stove is 5 to 18 cm. When the user is cooking, the air on the outside of the left wind shield 5 and the right wind shield 6 can flow from the gap between the lower edges of the left wind shield 5 and the right wind shield 6 and the countertop of the integrated stove to the area between the left wind shield 5 and the right wind shield 6. After the external air enters from the gap between the lower edges of the left wind shield 5 and the right wind shield 6 and the countertop of the integrated stove, it will be mixed with the oil smoke generated by cooking, and form a cyclone together with the oil smoke and flow toward the panel air intake port 21. It should be understood that when the user is cooking, the stove on the integrated stove burns oxygen, which will cause the air around the stove to become thin. By setting a gap between the lower edges of the left wind shield 5 and the right wind shield 6 and the countertop of the integrated stove, the airflow on both sides of the left wind shield 5 and the right wind shield 6 can flow to the surrounding of the stove to replenish the oxygen consumed by combustion, so that the gas can be fully burned.

[0045] See also Figure 1 , Figure 2 , Figure 4 and Figure 5The utility model also discloses an integrated stove with reduced disturbance. The integrated stove with reduced disturbance disclosed by the utility model includes the above-mentioned range hood head assembly, and also includes a cabinet 9. The range hood head assembly is used to be connected to the cabinet 9. The range hood head assembly has a horizontally arranged connecting surface, and the connecting surface is detachably connected to the corresponding surface 91 of the cabinet 9. The vertical air duct is connected to the cabinet air inlet 92 of the corresponding surface 91 through the air duct exhaust port arranged on the connecting surface, and is connected to the air collecting chamber in the cabinet 9. When the range hood head assembly of the utility model is used on the integrated stove, it is connected to the cabinet 9 of the integrated stove. The lower surface of the bottom of the shell 1 of the range hood head assembly is a connection surface, which is horizontally arranged and detachably connected to the corresponding surface 91 of the cabinet 9 of the integrated stove, so as to facilitate the cleaning of the vertical air duct and the air collecting chamber of the integrated stove; and the connection surface of the bottom of the shell 1 is provided with an air duct exhaust port, and the corresponding surface 91 of the cabinet 9 is provided with a cabinet air inlet 92. After the range hood head assembly is connected to the cabinet 9 of the integrated stove, the vertical air duct is connected to the air collecting chamber of the cabinet 9. When the main controller controls the exhaust fan to start, the oil smoke generated by the user's cooking enters the vertical air duct through the panel air inlet 21, then flows downward along the vertical air duct, enters the air duct exhaust port into the cabinet air inlet 92, then enters the air collecting chamber from the cabinet air inlet 92, and finally is discharged from the air collecting chamber of the cabinet 9.

[0046] The utility model of the integrated stove with reduced disturbance, the connection surface includes left and right sides, which have a contact surface that matches the corresponding surface of the cabinet 9, and a corresponding matching connection hole for connecting and fixing the range hood head assembly and the cabinet 9 through fasteners, and an oil guide slope is recessed in the direction of the connection surface toward the cabinet 9, and an oil leakage hole is arranged at the bottom of the oil guide slope, and an oil guide structure is arranged at the corresponding oil leakage hole of the cabinet 9 to guide the oil downward. The mixture of oil and water in the vertical air duct flows downward along the vertical air duct and drips onto the bottom surface of the shell 1, flows along the bottom surface of the shell 1, so that the air duct exhaust port is arranged at the center of the connection surface, and the two sides of the air duct exhaust port are recessed with oil guide slopes, the mixture of oil and water on the bottom surface of the shell 1 can smoothly flow downward along the oil guide slope, and after flowing to the bottom of the oil guide slope, it drips downward from the oil leakage hole at the bottom of the oil guide slope, and then the oil is guided downward by the oil guide structure on the cabinet 9. The utility model reduces disturbance of the integrated stove, the panel air intake port 21 is connected to the vertical air duct with expanded air duct area, the inner wall surface of the vertical air duct is smooth, the ratio of the horizontal cross-section of the panel air intake port 21 to the vertical air duct is 0.2 to 0.6, and an air duct expansion structure is formed after entering the panel air intake port 21; the lower end of the vertical air duct is provided with an air duct exhaust port, the ratio of the horizontal cross-section of the air duct exhaust port to the vertical air duct is 0.2-0.5, and a air duct contraction structure is formed after entering the air duct exhaust port. The so-called panel air intake port 21 connected to the vertical air duct with an expanded air duct area means that the width of the panel air intake port 21 is much smaller than the width of the horizontal section of the vertical air duct. In this way, when the oil smoke passes through the panel air intake port 21, the air inlet area is relatively small. After entering the vertical air duct, the area inside the air duct increases to form an expanded air duct area, which can increase the wind pressure at the panel air intake port 21 and make the negative pressure at the panel air intake port 21 have a greater suction force on the oil smoke. At the same time, when the oil smoke enters the vertical air duct through the panel air intake port 21, the air duct area becomes larger, the wind speed of the oil smoke decreases, and the noise when the oil smoke flows in the vertical air duct can be reduced. The so-called duct contraction structure entering the duct exhaust port refers to the width of the horizontal section of the vertical duct being larger than the air outlet area of ​​the duct exhaust port. When the oil smoke flows along the vertical duct to the duct exhaust port, the air outlet area of ​​the duct exhaust port is relatively small. When the oil smoke in the vertical duct passes through the duct exhaust port, the wind pressure increases and the wind speed increases, so that the oil smoke can quickly enter the air collecting chamber of the cabinet 9 through the vertical duct and be discharged.

[0047] When the power of the smoke exhaust fan is the same, the smaller the ratio of the horizontal cross-section of the panel air intake 21 to the vertical air duct, the greater the negative pressure formed by the smoke exhaust fan at the panel air intake 21, and the greater the wind speed at the panel air intake 21. However, since the structure of the integrated stove itself is relatively compact, if the ratio of the horizontal cross-section of the panel air intake 21 to the vertical air duct is small, if the distance between the panel air intake 21 and the ceiling of the integrated stove is too small, the flame of the stove will be sucked into the vertical air duct by the panel air intake 21, and the oil smoke in the vertical air duct will be ignited by the flame, causing a fire. Therefore, the height of the panel air intake 21 should be adjusted according to the ratio of the horizontal cross-section of the panel air intake 21 to that of the vertical air duct. When the ratio of the horizontal cross-section of the panel air intake 21 to that of the vertical air duct is relatively small, that is, when the air inlet area of ​​the panel air intake 21 is much smaller than the horizontal cross-sectional area of ​​the vertical air duct, the panel air intake 21 needs to be placed a little further away from the countertop of the integrated stove to avoid the flame of the burning stove from being sucked into the vertical air duct; when the ratio of the horizontal cross-section of the panel air intake 21 to that of the vertical air duct is relatively large, that is, when the air inlet area of ​​the panel air intake 21 is not much smaller than the horizontal cross-sectional area of ​​the vertical air duct, the panel air intake 21 needs to be placed a little closer to the countertop of the integrated stove to ensure that the oil smoke is sucked by the panel air inlet 21 to avoid the oil smoke from escaping in the process of flowing to the panel air intake 21.

[0048] In some embodiments, the ratio of the horizontal cross-section of the panel air intake 21 to the vertical air duct is greater than or equal to 0.2 and less than or equal to 0.4, and the distance from the center of the panel air intake 21 to the countertop of the integrated stove is 32 cm to 45 cm; the suction speed of the panel air intake 21 is 6 m / s to 12 m / s; that is to say, the air inlet area of ​​the panel air intake 21 is very small, and the negative pressure formed by the smoke exhaust fan at the panel air intake 21 under the same power is relatively large. At this time, the distance between the panel air intake 21 and the countertop of the integrated stove is specifically increased to prevent the flame of the burning stove from being sucked into the vertical air duct by the panel air intake 21. At the same time, the suction speed of the panel air intake 21 is 6 m / s to 12 m / s, which can ensure that the oil smoke is effectively sucked by the panel air intake 21, thereby preventing the oil smoke from escaping and polluting the cooking environment.

[0049] In other embodiments, the ratio of the panel air inlet 21 to the horizontal cross-section of the vertical air duct is greater than 0.4 and less than or equal to 0.6, the distance from the center of the panel air inlet 21 to the countertop of the integrated stove is 26cm to 35cm; the air suction speed of the panel air inlet 21 is 4m / s to 7m / s. That is, the air inlet area of ​​the panel air inlet 21 is relatively large, the negative pressure formed by the exhaust fan at the panel air inlet 21 under the same power is relatively small, and the wind speed at the panel air inlet 21 will also decrease accordingly. At this time, the panel air inlet 21 needs to be close to the countertop of the integrated stove, so as to ensure that the oil smoke can be effectively sucked by the panel air inlet 21 to prevent the oil smoke from escaping and polluting the cooking environment.

[0050] See also Figure 3 In the utility model, the integrated stove with reduced disturbance, the air duct exhaust port is arranged at the center of the connection surface, and the air duct exhaust port has a sparse air grille 11. The air passing through each air hole of the sparse air grille 11 enters the air collecting cavity of the cabinet 9. The ratio of the total area formed by the projection of each air hole of the sparse air grille 11 on the horizontal plane to the horizontal cross section of the vertical air duct is 0.3 to 0.78. In order to improve the stability of the air flow under the condition of changing air volume, the effect will be better if the ratio of the total area formed by the projection of each air hole on the horizontal plane to the horizontal cross section of the vertical air duct is smaller, for example, the ratio is 0.38 to 0.5. However, technicians in this field often believe that in order to increase the exhaust volume as much as possible to achieve a large exhaust volume of 20-28 cubic meters and minimize the flow resistance in the overall flow channel, they tend to adopt a larger ratio of the total area formed by the projection of each air hole on the horizontal plane to the horizontal cross-section of the vertical air duct. Generally, a ratio greater than 0.5 or even greater than 0.65 is adopted. Although this can reduce noise and improve the smoothness of the air duct, when the fan speed changes, concentrated air flow rate changes will occur, causing abnormal noise and airflow impact. It is even more impossible to further increase the resistance by using a small suction port on the basis of a small ratio of the total area formed by the projection of each air hole on the horizontal plane to the horizontal cross-section of the vertical air duct. The practice of increasing the wind speed at the suction port by adopting effective airflow organization, reducing the exhaust volume, and reducing the area of ​​the suction port has become a practice that contradicts the common cognition of technicians in this field.

[0051] During long-term use, a large amount of oil and water mixture will accumulate in the vertical air duct. After accumulating a certain amount, these mixtures will flow downward along the inner wall of the vertical air duct. Since the inner wall of the vertical air duct is smooth, these mixtures will flow downward along the inner wall of the vertical air duct until they accumulate on the connecting surface at the bottom of the vertical air duct, and then flow toward the duct exhaust port in the center of the connecting surface and enter the cabinet air inlet 92 through the duct exhaust port, and then enter the air collecting cavity of the cabinet 9 from the cabinet air inlet 92. An air vent grille 11 is provided at the air duct exhaust port, so that the oil smoke flowing to the air duct exhaust port in the air duct can only enter the air collecting chamber of the cabinet 9 through various air holes, so that an air duct contraction structure is formed at the air duct exhaust port, which can increase the wind pressure and flow rate of the oil smoke flowing through various air holes; in addition, if parts inside the range hood head assembly fall off in the air duct, the air vent grille 11 can prevent the fallen parts from entering the air collecting chamber of the cabinet 9 through the air duct exhaust port, thereby generating greater vibration and noise in the air collecting chamber.When the airflow in the vertical air duct passes through the sparse air grille 11, the airflow will generate a certain pressure on the sparse air grille 11. If the lines forming the net of the sparse air grille 11 are thinner and the meshes of the sparse air grille 11 are sparser, the total area formed by the projections of the sparse air grille 11 and the various air holes of the sparse air grille 11 on the horizontal plane will be larger, and the resistance encountered by the airflow in the vertical air duct when passing through the sparse air grille 11 will be smaller. However, the pressure of the airflow will cause the sparse air grille 11 to deform, affecting the service life of the sparse air grille 11. In addition, the sparser the holes of the sparse air grille 11 and the larger the area of ​​the holes, the more effective the sparse air grille 11 is in filtering the parts dropped from the range hood head assembly by the airflow in the vertical air duct. The weaker the effect; therefore, when the lines of the net forming the air sparse grille 11 are relatively thin, in order to enhance the strength of the air sparse grille 11, it is usually necessary to make the mesh ratio of the air sparse grille 11 denser, so that the ratio of the total area formed by the projection of each air hole of the air sparse grille 11 on the horizontal plane to the horizontal cross-section of the vertical air duct will not be too small, which will not affect the airflow in the vertical air duct passing through the air sparse grille 11, and can also enable the air sparse grille 11 to effectively filter the parts dropped from the inside of the range hood head assembly; the thicker the lines of the net of the air sparse grille 11 and the denser the mesh of the air sparse grille 11, the ratio of the total area formed by the projection of each air hole of the air sparse grille 11 on the horizontal plane to the horizontal cross-section of the vertical air duct will be small. The larger the value, although such a sparse air grille 11 can effectively filter the parts that fall inside the range hood head assembly, it also has a certain impact on the passage of airflow in the vertical air duct; therefore, when the lines of the mesh forming the sparse air grille 11 are relatively thick, in order to enhance the strength of the sparse air grille 11, it is usually necessary to make the mesh holes on the sparse air grille 11 relatively sparse, so that the ratio of the total area formed by the projection of each air hole of the sparse air grille 11 on the horizontal plane to the horizontal cross-section of the vertical air duct will not be too large, which will not affect the airflow in the vertical air duct passing through the sparse air grille 11, and can also make the sparse air grille 11 effectively filter the parts that fall inside the range hood head assembly; the collection of the utility model For a finished stove, the ratio of the total area formed by the projections of the air holes of the air grille 11 on the horizontal plane to the horizontal cross-section of the vertical air duct is 0.3 to 0.78. When the ratio of the total area formed by the projections of the air holes of the air grille 11 on the horizontal plane to the horizontal cross-section of the vertical air duct is greater than 0.5, it means that the mesh of the air grille 11 is too dense, which will affect the airflow in the vertical air duct passing through the air grille 11. When the ratio of the total area formed by the projections of the air holes of the air grille 11 on the horizontal plane to the horizontal cross-section of the vertical air duct is less than 0.38, it means that the mesh of the air grille 11 is too sparse and cannot effectively filter the parts dropped from the inside of the range hood head assembly.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A range hood head assembly for an integrated stove, characterized in that: include: A vertical air duct surrounded by the shell (1); A panel (2), the panel (2) having a horizontally arranged narrow and long panel air suction port (21), the panel air suction port (21) being connected to the vertical air duct; A top plate (3) or / and a smoke collecting plate (4) whose horizontal projection exceeds the projection of the vertical air duct in the horizontal direction; A left windshield (5) and a right windshield (6); When the integrated stove is in operation, a negative pressure zone is formed outside the panel air intake port (21) along the length direction of the panel air intake port (21), and air enters the panel air intake port (21) from top to bottom from the top plate (3) or the smoke collecting plate (4); air enters the panel air intake port (21) from the outer edges of the left wind shield plate (5) and the right wind shield plate (6); The smoke collecting plate (4) is arranged parallel to the panel air suction port (21), and the smoke collecting plate (4) forms an angle α with a horizontal plane, wherein the angle α ranges from -15° < α < 15°. The smoke collecting plate (4) has a support member (41), and the smoke collecting plate (4) extends toward a user side. The projection length of the smoke collecting plate (4) in the horizontal direction is 0.8 to 2.5 times the projection length of the vertical air duct in the horizontal direction. A narrow slit is formed between the side of the smoke collecting plate (4) facing the shell (1) and the shell (1), and the size of the narrow slit is in the range of 0.1 cm to 1.5 cm.

2. The range hood head assembly according to claim 1, characterized in that: The top plate (3) comprises a top cover and a side wall, a detection through hole (31) is arranged on the top cover and / or the side wall, an air detection device (7) is arranged inside the top plate (3), the air detection device (7) comprises a shell, a detection air inlet and a detection air outlet are formed on the shell, the shell has a one-way air duct flowing from the detection air inlet to the detection air outlet, the one-way air duct has a detection induced draft fan, the detection induced draft fan is used to form a one-way airflow from the detection air inlet to the detection air outlet, and after the detection induced draft fan is turned on, the air entering from the detection through hole (31) enters the detection air inlet.

3. The range hood head assembly according to claim 2, characterized in that: A display device (8) for displaying PM2.5 values ​​is provided on the front of the top plate (3); the display device (8) and the air detection device (7) are both connected to a main controller of the integrated stove; the main controller controls the smoke exhaust fan of the integrated stove to actively turn on, delay shutoff, or adjust the rotation speed according to the value detected by the air detection device (7); and the main controller controls the display device (8) to display accordingly according to the value detected by the air detection device (7).

4. The range hood head assembly according to claim 1, characterized in that: The left wind shield (5) and the right wind shield (6) extend in a vertical direction, and form a detachable structure with the shell (1) on the side facing the shell (1), so that a sealed connection structure is formed at the connection between the left wind shield (5) and the right wind shield (6) on the side facing the shell (1) and the shell (1); the lower parts of the left wind shield (5) and the right wind shield (6) have arc-shaped edges, and their widths gradually decrease; the distance between the lower edges of the left wind shield (5) and the right wind shield (6) and the countertop of the integrated stove is 5 to 18 cm.

5. The range hood head assembly according to claim 1, characterized in that: The projection length of the top plate (3) in the horizontal direction is 1.8 to 4 times the projection length of the vertical air duct in the horizontal direction; an air curtain fan (33) is arranged in the top plate (3); a portion of the lower surface of the top plate (3) that exceeds the vertical air duct in the horizontal direction is formed with an air curtain outlet (32); the air curtain fan (33) discharges air downward through the air curtain outlet (32) to form an air curtain; or / and a lighting device is formed on the portion of the lower surface of the top plate (3) that exceeds the vertical air duct in the horizontal direction.

6. The range hood head assembly according to claim 1, characterized in that: The top plate (3) comprises a top cover and side walls, and detection holes (31) are arranged on the top cover and / or the side walls. An air detection device (7) is arranged inside the top plate (3), and a narrow slit formed between the side of the smoke collecting plate (4) facing the shell (1) and the shell (1) has a return flow flowing toward the negative pressure zone; the return flow comes from air flowing in from the upper side of the top cover of the top plate (3); and / or the return flow comes from air escaping upwards from the side of the smoke collecting plate (4) facing the user.

7. An integrated stove for reducing disturbance, comprising the range hood head assembly according to any one of claims 1 to 6, characterized in that: It also includes a cabinet, and the range hood head assembly is used to connect with the cabinet (9), the range hood head assembly has a horizontally arranged connection surface, the connection surface is detachably connected to the corresponding surface (91) of the cabinet (9), and the vertical air duct is connected to the cabinet air inlet (92) of the corresponding surface (91) through the air duct exhaust port arranged on the connection surface, and is connected to the air collecting chamber in the cabinet (9).

8. The integrated stove for reducing disturbance according to claim 7, characterized in that: The panel air intake port (21) is connected to the vertical air duct of the expanded air duct area, the inner wall surface of the vertical air duct is smooth, the ratio of the horizontal cross-section of the panel air intake port (21) to the vertical air duct is 0.2 to 0.6, and an air duct expansion structure is formed after entering the panel air intake port (21); the lower end of the vertical air duct is provided with an air duct exhaust port, the ratio of the horizontal cross-section of the air duct exhaust port to the vertical air duct is 0.2-0.5, and an air duct contraction structure is formed after entering the air duct exhaust port.

9. The integrated stove for reducing disturbance according to claim 8, characterized in that: The ratio of the horizontal cross-section of the panel air suction port (21) to the horizontal cross-section of the vertical air duct is greater than or equal to 0.2 and less than or equal to 0.4, and the distance from the center of the panel air suction port (21) to the countertop of the integrated stove is 32 cm to 45 cm; the air suction speed of the panel air suction port (21) is 6 m / s to 12 m / s; or the ratio of the horizontal cross-section of the panel air suction port (21) to the horizontal cross-section of the vertical air duct is greater than 0.4 and less than or equal to 0.6, and the distance from the center of the panel air suction port (21) to the countertop of the integrated stove is 26 cm to 35 cm; the air suction speed of the panel air suction port (21) is 4 m / s to 7 m / s.

Images