Integrated range hood

Abstract

The utility model relates to an integrated range hood, which comprises a shell in which an oil smoke suction fan is arranged, and is characterized in that a cooking module is also arranged in the shell, is arranged below the oil smoke suction fan, and is provided with an inner container; an air inlet channel is formed between the rear side wall of the inner container and the back plate of the machine shell at the corresponding position, and an exhaust hole is formed in the rear side wall of the inner container. A cooking module of the integrated extractor hood is arranged below an oil smoke suction fan, an exhaust hole is relatively close to an air inlet in the lower portion of a machine shell, an air inlet channel is formed between the rear side wall of an inner container and a back plate of the machine shell, and the exhaust hole is formed in the rear side wall of the inner container. Oil fume and steam exhausted by the exhaust holes enter the oil fume suction fan through the air inlet channel, and due to the fact that the temperature of the air inlet channel is high and the temperature difference between the air inlet channel and airflow exhausted by the exhaust holes is small, the oil fume and the steam are not prone to condensation and can be synchronously exhausted along with the oil fume in the air inlet channel.

Description

TECHNICAL FIELD

[0001] The utility model relates to a range hood, especially an integrated range hood. BACKGROUND

[0002] Chinese kitchens are generally small in area, and with the improvement of living standards, smoke, stove, dishwasher, steaming oven in kitchen appliances have basically become standard. However, due to space constraints, some kitchens may not have space to install a steaming oven, and some users will balance the necessity between the steaming oven and other appliances such as a disinfection cabinet and a microwave oven, and choose to install one. Therefore, in limited space, how to place more household appliances is a difficulty. Some users choose to install an integrated stove to integrate smoke, stove, and steaming in one countertop. Although the integrated stove integrates smoke, stove, and steaming in one countertop, it releases the space of the hanging cabinet, but due to the generally high space of the hanging cabinet, it is very inconvenient to use and has low utilization rate. Some users may choose a table type steaming oven to place the appliance on the countertop. The table type steaming oven is small in volume and low in price, and its performance is not as good as that of an embedded steaming oven. In addition, a table type hot water kettle and a rice cooker are standard in all families. If a table type steaming oven is added, the countertop will be crowded and not aesthetically pleasing. Some users choose to place an embedded steaming oven below the countertop. On the one hand, it occupies the space of the lower cabinet, and on the other hand, the user experience is very poor. The user has to bend down to place the steaming tray, and has to squat down to clean the inner tank. In addition, when the door is opened, the user's face will be splashed with steam. Therefore, some embedded steaming ovens are placed in high cabinets, and small kitchens do not have space for high cabinets.

[0003] Therefore, people have invented an integrated range hood, such as the Chinese utility model patent with the patent number CN 202021980570.9 (authorized publication number CN 214009305 U) discloses an integrated range hood. The range hood includes a shell, a cooking device arranged in the shell, and a fan frame arranged above the shell. A fan system is arranged in the fan frame. An air inlet is arranged at the bottom of the shell and below the cooking device. An air inlet passage is formed between the inner side of the shell and the rear side of the cooking device to fluidly connect the air inlet and the fan system. A first flow guide part is formed at the bottom end of the rear side wall of the side of the cooking device facing the air inlet passage and extends downward and forward. The front end of the first flow guide part is connected to the rear end of the bottom wall of the cooking device. By arranging the first flow guide part and the second flow guide part on the box body, the flow resistance in the air inlet passage can be effectively reduced, and the efficiency of the oil fume gas flow can be improved. By arranging the flow guide plate in the air inlet passage, the oil fume flowing into the air inlet can be guided to the fan system, and the flow efficiency is improved. The integrated range hood does not consider the mutual influence of the cooking module and the oil fume suction module, especially in the case that the inner tank of the cooking module has an exhaust hole. The position of the exhaust hole needs to be reasonably designed to minimize the influence of the cooking inner tank temperature field by the air inlet of the range hood. SUMMARY

[0004] The technical problem to be solved by this utility model is to provide an integrated range hood that makes it less likely for steam discharged from the exhaust port to condense in the air inlet channel, in light of the above-mentioned existing technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an integrated range hood, including a housing, in which a range hood fan is installed, characterized in that: a cooking module is also installed inside the housing, the cooking module is located below the range hood fan, the cooking module has an inner liner, an air inlet channel is formed between the rear side wall of the inner liner and the corresponding position of the back plate of the housing, and an exhaust hole is opened on the rear side wall of the inner liner.

[0006] To bring the exhaust port closer to the smoke source, preferably, the exhaust port is located on the lower part of the rear side wall of the inner liner.

[0007] Further preferably, the lower part of the rear sidewall of the inner liner has a downwardly inclined wall that slopes backward from bottom to top, and the vent is located on the downwardly inclined wall. This arrangement can prevent the backflow of condensed oil and water vapor at the vent.

[0008] Further preferably, the rear sidewall of the inner liner protrudes outward from the middle, forming a downwardly inclined wall, a middle outwardly convex wall, and an upwardly inclined wall. This configuration creates an irregularly shaped air intake channel that is wide at the top, narrow in the middle, and wide at the bottom. The narrowing of the middle section of the air intake channel accelerates exhaust.

[0009] To further prevent the backflow of condensed oil and water vapor at the vent, an exhaust pipe is installed on the vent, and the exhaust pipe is arranged obliquely downward from front to back.

[0010] To prevent condensed oil and water vapor from flowing back onto the surface of the exhaust pipe, the exhaust pipe is perpendicular to the lower inclined wall.

[0011] Further preferably, a baffle is installed below the exhaust pipe. The baffle has two main functions: firstly, it can create a local "vacuum zone" behind the exhaust port, where the flow velocity is much lower than that in the air inlet channel, resulting in less disturbance to the temperature stability of the oven cavity; secondly, it can catch the condensed oil and water droplets discharged from the exhaust port, preventing them from dripping directly onto the bottom guide plate and splashing out.

[0012] Preferably, the vertical projection of the exhaust pipe outlet falls entirely on the baffle. This arrangement allows the baffle to completely catch the condensed oil and water droplets discharged from the exhaust port.

[0013] Further preferably, the baffle is arranged at an angle from bottom to top and then backward. This arrangement allows condensed oil and water droplets falling on the baffle to fall off smoothly.

[0014] In order to ensure that all the condensed oil and water droplets on the baffle can drip onto the guide plate and then flow into the oil cup, an air inlet is provided below the air inlet channel, and a guide plate is installed at the air inlet. The guide plate is arranged obliquely from bottom to top and backward, and an oil cup is installed below the guide plate. The vertical projection of the baffle falls entirely on the guide plate.

[0015] Further preferably, the diameter of the exhaust vent increases with the increase of the height difference between the exhaust vent and the range hood. Specifically, the taller the machine, the farther the distance between the exhaust vent and the fan, and the larger the exhaust vent. The larger the exhaust vent, the more easily the temperature field of the steam oven's inner cavity is affected by the air intake of the range hood, resulting in greater disturbance to the temperature field of the steam oven. Conversely, the shorter the machine, the closer the distance between the exhaust vent and the fan, the smaller the exhaust vent, and the less disturbance to the performance of the steam oven.

[0016] As a preferred embodiment of any of the above solutions, the housing includes an upper box and a lower box, the range hood is installed inside the upper box, the cooking module is installed inside the lower box, and the air intake channel is formed between the rear side wall of the inner liner and the back panel of the lower box.

[0017] In order to enable the lower housing to move up and down relative to the upper housing, the housing includes an upper housing and a lower housing. The upper housing is equipped with a drive mechanism, and the lower housing is equipped with the cooking module. The lower housing can move up and down relative to the upper housing under the drive of the drive mechanism.

[0018] Compared with the prior art, the advantages of this utility model are as follows: The integrated range hood has a cooking module installed inside the casing, which is located below the range hood fan. An air intake channel is formed between the rear side wall of the inner liner of the cooking module and the corresponding back panel of the casing. An exhaust hole is opened on the rear side wall of the inner liner, and the position of the exhaust hole is relatively close to the air inlet at the bottom of the casing. When the range hood fan and the cooking module are turned on at the same time, the oil fumes and steam discharged from the exhaust hole enter the range hood fan through the air intake channel. Since the temperature of the air intake channel is high and the temperature difference with the airflow discharged from the exhaust hole is small, the oil fumes and steam are not easy to condense and can be discharged synchronously with the oil fumes in the air intake channel. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the range hood according to an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 The side view of the range hood shown;

[0021] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the range hood.

[0022] Figure 4 forFigure 1 The diagram shows the structure of the range hood (cooking module door panel open).

[0023] Figure 5 for Figure 1 The diagram shown is a schematic of the internal structure of the range hood.

[0024] Figure 6 This is a schematic diagram of the inner pot of the cooking module in an embodiment of the present invention. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 6 As shown, the integrated range hood of this embodiment includes a housing, which includes an upper housing 1 and a lower housing 2. The upper housing 1 is equipped with a range hood fan 3 and a drive mechanism 9. The lower housing 2 is equipped with a cooking module 4, which is located below the range hood fan 3. The lower housing 2 can move up and down relative to the upper housing 1 under the drive of the drive mechanism 9.

[0027] The cooking module 4 has an inner pot 41, and an air intake channel 5 is formed between the rear side wall of the inner pot 41 and the back plate of the lower box 2. The middle part of the rear side wall of the inner pot 41 protrudes outward, forming a downward inclined wall 43, a middle outward convex wall 44, and an upward inclined wall 45. That is, the air intake channel 5 forms an irregular air intake channel that is wide at the top, narrow in the middle, and wide at the bottom. The narrowing of the middle section of the air intake channel can accelerate exhaust.

[0028] A downwardly inclined wall 43 is located at the lower part of the rear side wall of the inner liner 41 and is inclined backward from bottom to top. An exhaust hole 42 is opened on the downwardly inclined wall 43, through which oil fumes and steam inside the inner liner 41 are discharged into the air inlet channel 5. An exhaust pipe 46 is installed on the exhaust hole 42. The exhaust pipe 46 is arranged inclined downward from front to back and is perpendicular to the downwardly inclined wall 43 to prevent the backflow of condensed oil and water vapor on the surface of the exhaust pipe 46.

[0029] A baffle 47 is installed below the exhaust pipe 46. The baffle 47 is arranged obliquely backward from bottom to top, and the vertical projection of the exhaust pipe 46 outlet falls entirely on the baffle 47. The baffle 47 can create a local "vacuum zone" behind the exhaust port, where the flow velocity is much lower than that in the air inlet channel, resulting in less disturbance to the temperature field stability of the oven cavity. On the other hand, it can catch the condensed oil and water droplets discharged from the exhaust pipe 46, preventing them from dripping directly downward.

[0030] In addition, an air inlet 6 is provided below the air inlet channel 5, and a guide plate 7 is installed at the air inlet 6. The guide plate 7 is arranged obliquely from bottom to top and backward. An oil cup 8 is installed below the guide plate 7. The projection of the baffle 47 in the vertical direction falls entirely on the guide plate 7, and the condensed oil and water droplets on the baffle 47 can all drip onto the guide plate 7.

[0031] The exhaust vent 42 is the connection point between the cooking module 4 and the range hood module. During cooking, the fumes and steam generated by the cooking module 4 are exhausted through the exhaust vent 42 into the air intake duct 5, and then discharged outdoors by the exhaust fan 3. The relationship between the two can be divided into the following two cases:

[0032] When the exhaust vent 42 is fixed in position relative to the cooking module 4, since the air volume Q = velocity v * area s, meaning the exhaust vent 42 is fixed in position relative to the air inlet channel 5, and the area of ​​the corresponding air inlet channel 5 is fixed, the velocity at the corresponding position remains constant when the air volume is constant. The greater the distance L between the range hood 3 and the exhaust vent 42, the greater the velocity, according to Darcy's formula... It can be seen that the frictional resistance h f The diameter of the exhaust port is directly proportional to the length l of the air intake channel and inversely proportional to the area of ​​the air intake channel. That is, the higher the overall height of the machine, the greater the friction resistance along the air intake channel 5, and the more difficult it is to exhaust. To ensure the same exhaust effect, the diameter d of the exhaust port should be larger.

[0033] When the overall height of the unit is fixed, that is, assuming the position of the range hood 3 relative to the cooking module 4 is fixed, the position of the exhaust port 42 on the cooking module 4 changes, that is, the position of the exhaust port 42 relative to the air inlet channel 5 changes. Since the area of ​​the air inlet channel decreases from bottom to top, and the air volume Q = velocity v * area s, the air velocity inside the air inlet channel 5 increases from bottom to top. The friction resistance and velocity have the following relationship: h f =k·v m That is, as the flow velocity increases, the friction resistance increases. In summary, the larger the distance h between the exhaust port and the fan, the larger the corresponding air inlet area, the lower the air velocity, and the lower the friction resistance. Furthermore, according to the relationship between pressure and airflow, P = ζQ... 2 +α, where ζ is the resistance coefficient, that is, the larger h is, the smaller the corresponding pressure value, that is, (pressure P1 corresponding to h1) < (pressure P2 corresponding to h2) < (pressure P3 corresponding to h3). Assuming the internal pressure of the inner liner 41 is P0, then the relationship between the pressure difference of the steam oven and the range hood channel at the corresponding positions of h1, h2, and h3 is ΔP1 < ΔP2 < ΔP3. The larger the pressure difference, the easier it is for the oil fumes and steam generated inside the inner liner 41 to be discharged. That is, under the condition of discharging the same amount of oil fumes and steam, the larger h is, the larger the diameter of the exhaust hole 42 should be.

[0034] In summary, the diameter of the exhaust port 42 in this embodiment increases with the increase of the height difference between the exhaust port 42 and the range hood 3. The taller the machine, the farther the distance between the exhaust port and the fan, and the larger the exhaust port. The larger the exhaust port, the more easily the temperature field of the steam oven cavity is affected by the air intake of the range hood, and the greater the disturbance to the temperature field of the steam oven. The shorter the machine, the closer the distance between the exhaust port and the fan, the smaller the exhaust port, and the less disturbance to the performance of the steam oven.

[0035] Assuming the pressure generated inside cooking module 4 during cooking is P0, the pressure in the range hood channel corresponding to exhaust vent 42 is P1, and the pressure at the range hood fan 3 is P2, since the size, speed, and flow rate Q of the range hood fan are fixed, the pressure P2 is a constant, and P1 is the negative pressure generated at the power point of the range hood fan after P2 overcomes the friction resistance. Right now Furthermore, according to the relationship between pressure and air volume, P = ζQ 2 +α, and Q=V*S, we can obtain

[0036] From Bernoulli's equation, we can obtain Where V0 is the wind speed at the exhaust vent of the steam oven, and V1 is the wind speed in the range hood duct corresponding to the exhaust vent of the steam oven. Therefore... again (Where Q0 is the airflow of the steam oven's exhaust vent, S0 is the area of ​​the exhaust vent, Q1 is the airflow at the corresponding duct of the range hood (where Q1 = Q at the range hood duct), and S1 is the area at the corresponding duct of the range hood.) We can obtain...

[0037] From formulas ① and ②, we can obtain Since Q and P0 are constants, and by Figure 3 Therefore, S and S1 represent the width l and depth x of the corresponding air inlet channel. Assuming the exhaust port is circular, the formula relating the radius r, the depth x of the corresponding air inlet channel, and the position h of the exhaust port relative to the fan is as follows:

[0038]

[0039] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. An integrated extractor hood comprising a casing inside which a suction fan (3) is mounted, characterized in that: A cooking module (4) is further installed inside the cabinet, the cooking module (4) is arranged below the range hood (3), the cooking module (4) has an inner container (41), an air inlet channel (5) is formed between the rear side wall of the inner container (41) and the corresponding position of the cabinet back plate, and an exhaust hole (42) is opened on the rear side wall of the inner container (41).

2. The integrated range hood according to claim 1, characterized in that: The exhaust hole (42) is arranged on the lower part of the rear side wall of the inner container (41).

3. The integrated range hood according to claim 2, wherein: The lower part of the rear side wall of the inner container (41) has a lower inclined wall (43) which is inclined rearward from bottom to top, and the exhaust hole (42) is arranged on the lower inclined wall (43).

4. The integrated range hood according to claim 3, wherein: The middle part of the rear side wall of the inner container (41) is outwardly convex rearward, so that the rear side wall is formed with the lower inclined wall (43), the middle outward convex wall (44) and the upper inclined wall (45).

5. The integrated range hood according to claim 3, wherein: An exhaust pipe (46) is installed on the exhaust hole (42), and the exhaust pipe (46) is arranged inclined downward from front to back.

6. The integrated range hood according to claim 5, wherein: The exhaust pipe (46) is perpendicular to the lower inclined wall (43).

7. The integrated range hood according to claim 5, wherein: A baffle (47) is installed below the exhaust pipe (46).

8. The integrated range hood according to claim 7, characterized in that: The projection of the outlet of the exhaust pipe (46) in the vertical direction falls on the baffle (47).

9. The integrated range hood according to claim 7, wherein: The baffle (47) is arranged inclined rearward from bottom to top.

10. The integrated range hood according to claim 7, wherein: An air inlet (6) is arranged below the air inlet channel (5), a guide plate (7) is installed on the air inlet (6), the guide plate (7) is arranged inclined rearward from bottom to top, an oil cup (8) is installed below the guide plate (7), and the projection of the baffle (47) in the vertical direction falls on the guide plate (7).

11. The integrated range hood of claim 1, wherein: The aperture of the exhaust hole (42) increases with the increase of the height difference between the exhaust hole (42) and the range hood (3).

12. The integrated range hood according to any one of claims 1 to 11, characterized in that: The cabinet comprises an upper cabinet (1) and a lower cabinet (2), the range hood (3) is installed inside the upper cabinet (1), the cooking module (4) is installed inside the lower cabinet (2), and the air inlet channel (5) is formed between the rear side wall of the inner container (41) and the back plate of the lower cabinet (2).

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