CN109425000A - A kind of kitchen ventilator and its two fans system, negative pressure drainage structure - Google Patents

A kind of kitchen ventilator and its two fans system, negative pressure drainage structure Download PDF

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Publication number
CN109425000A
CN109425000A CN201710729210.8A CN201710729210A CN109425000A CN 109425000 A CN109425000 A CN 109425000A CN 201710729210 A CN201710729210 A CN 201710729210A CN 109425000 A CN109425000 A CN 109425000A
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CN
China
Prior art keywords
negative pressure
air
blower
flow
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710729210.8A
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Chinese (zh)
Inventor
邹庆强
王慧
姚庆辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Electrical Appliances Jiangsu Co Ltd
BSH Hausgeraete GmbH
Original Assignee
BSH Electrical Appliances Jiangsu Co Ltd
BSH Bosch und Siemens Hausgeraete GmbH
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Filing date
Publication date
Application filed by BSH Electrical Appliances Jiangsu Co Ltd, BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Electrical Appliances Jiangsu Co Ltd
Priority to CN201710729210.8A priority Critical patent/CN109425000A/en
Publication of CN109425000A publication Critical patent/CN109425000A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00Details
    • F24C15/20Removing cooking fumes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/28Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers

Abstract

A kind of kitchen ventilator and its two fans system, negative pressure drainage structure, the two fans system includes: the first blower and the second blower, the air intake vent of first blower and the inlet communication of kitchen ventilator, the outlet of the air outlet of second blower and the kitchen ventilator, the two fans system further include: the air-flow of negative pressure drainage structure, the air outlet outflow of the first blower flows into the air intake vent of the second blower via negative pressure drainage structure;Wherein, negative pressure drainage structure includes negative pressure booster portion and static pressure forming portion, the outlet in negative pressure booster portion is connected with the import of static pressure forming portion, and the air-flow of the air outlet outflow of the first blower flows into negative pressure booster portion, and the air-flow of static pressure forming portion outflow enters the air intake vent of the second blower.It is good using the kitchen ventilator smoking effect of the present invention program, and low energy consumption, noise is small, can effectively reduce windage loss when air-flow circulates between two blowers.

Description

A kind of kitchen ventilator and its two fans system, negative pressure drainage structure
Technical field
The present invention relates to kitchen ventilator technical fields, more particularly to a kind of kitchen ventilator and its two fans system, negative pressure drainage Structure.
Background technique
In order to increase discharge capacity, more and more kitchen ventilators start using two fans structure.But double wind of existing kitchen ventilator Machine structure is being designed without the air-flow trend considered between two blowers, and irrational mix designs will lead to entire pair instead The smoking effect of blower fan system is deteriorated.
Summary of the invention
The technical issues of embodiment of the present invention solves is the airflow channel how optimized in two fans system between two blowers, To improve kitchen ventilator smoking effect.
In order to solve the above technical problems, the present invention provides a kind of two fans system for kitchen ventilator, including the first blower With the second blower, the inlet communication of the air intake vent of first blower and the kitchen ventilator, the air outlet of second blower with The outlet of the kitchen ventilator, the two fans system further include: negative pressure drainage structure, the air outlet stream of first blower Air-flow out flows into the air intake vent of second blower via the negative pressure drainage structure;Wherein, the negative pressure drainage structure packet Negative pressure booster portion and static pressure forming portion are included, the outlet in the negative pressure booster portion is connected with the import of the static pressure forming portion, institute The air-flow for stating the air outlet outflow of the first blower flows into the negative pressure booster portion, and negative pressure of the air-flow in the negative pressure booster portion Direction along air-flow is gradually increased, and the air-flow of the static pressure forming portion outflow enters the air intake vent of second blower, and air-flow Static pressure section is formed in the outlet of the static pressure forming portion.
Optionally, the negative pressure booster portion includes gradually reducing pipeline, and the gradually reducing pipeline is for introducing first blower The air-flow of air outlet outflow, and the cross-sectional area of the gradually reducing pipeline is gradually reduced along the flow direction of air-flow.
Optionally, the biggish air outlet open at one end towards first blower of cross-sectional area in the gradually reducing pipeline.
Optionally, the static pressure forming portion includes flaring pipeline, and the flaring pipeline is used for will be from the negative pressure booster portion The air-flow of outflow is exported to the air intake vent of second blower, and the cross-sectional area of the flaring pipeline along air-flow flow direction by It is cumulative big.
Optionally, the biggish air intake vent open at one end towards second blower of cross-sectional area in the flaring pipeline.
Optionally, the negative pressure drainage structure further includes smooth transition structure, the both ends difference of the smooth transition structure It is connected to the outlet in the negative pressure booster portion and the import of static pressure forming portion.
Optionally, the constant cross-sectional area of the smooth transition structure.
Optionally, the cross-sectional area of the smooth transition structure is gradually increased from center to both ends.
Optionally, first blower is set in the negative pressure booster portion.
Optionally, the two fans system further includes auxiliary negative pressure drainage structure, and the of the auxiliary negative pressure drainage structure The inlet communication of one end and the kitchen ventilator, the second end and the negative pressure drainage structure of the auxiliary negative pressure drainage structure connect Logical, the auxiliary negative pressure drainage structure, which is used to guide in the air-flow flowed into from first end, flows out to the negative pressure drainage through second end Structure.
Optionally, the second end of the auxiliary negative pressure drainage structure is connected to the static pressure forming portion.
Optionally, first blower, negative pressure drainage structure and the second blower is bottom-up in the vertical direction is set to In the casing of the kitchen ventilator.
Optionally, the two fans system further include: around the first mounting disc of the import in the negative pressure booster portion, and The second mounting disc around the outlet of the static pressure forming portion, first mounting disc and second mounting disc are provided with more A through-hole assists negative pressure section to be formed.
Optionally, first blower is crossflow fan.
Optionally, second blower is centrifugal blower.
The technical solution of the embodiment of the present invention also provides a kind of negative pressure drainage structure, comprising: negative pressure booster portion and static pressure shape At portion, the outlet in the negative pressure booster portion is connected with the import of the static pressure forming portion;First blower is set to the negative pressure In plenum, the air-flow of the air outlet outflow of first blower flows into the negative pressure booster portion and via the static pressure forming portion Outflow;Wherein, the negative pressure from the air-flow of the air outlet inflow of first blower in the negative pressure booster portion is along the side of air-flow To being gradually increased, the air-flow for the import for flowing into the static pressure forming portion from the outlet in the negative pressure booster portion is formed in the static pressure The outlet in portion forms static pressure section.
Optionally, the negative pressure drainage structure further include: smooth transition structure, the both ends difference of the smooth transition structure It is connected to the outlet in the negative pressure booster portion and the import of static pressure forming portion.
The technical solution of the embodiment of the present invention also provides a kind of kitchen ventilator, including casing, the kitchen ventilator further include: above-mentioned Two fans system.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantage that
The technical solution of the embodiment of the present invention provides a kind of two fans system for kitchen ventilator, including the first blower and The inlet communication of two blowers, the air intake vent of first blower and the kitchen ventilator, the air outlet of second blower with it is described The outlet of kitchen ventilator.The two fans system further include: negative pressure drainage structure, the air outlet outflow of first blower Air-flow flows into the air intake vent of second blower via the negative pressure drainage structure;Wherein, the negative pressure drainage structure includes negative Pressure plenum and static pressure forming portion, the outlet in the negative pressure booster portion are connected with the import of the static pressure forming portion, and described the The air-flow of the air outlet outflow of one blower flows into the negative pressure booster portion, and negative pressure of the air-flow in the negative pressure booster portion is along gas The direction of stream is gradually increased, and the air-flow of the static pressure forming portion outflow enters the air intake vent of second blower, and air-flow is in institute The outlet for stating static pressure forming portion forms static pressure section.Compared with the design scheme for the two fans system for being currently used for kitchen ventilator, this hair Two fans system described in bright embodiment increases negative pressure drainage structure between main air blower and accessory fan, is drawn by the negative pressure Flow structure rationally designs the air-flow trend between two blowers, optimizes the airflow channel of two fans system, reduces windage loss, change The smoking effect of the kind kitchen ventilator using two fans system described in the embodiment of the present invention.Further, the two fans system passes through The negative pressure booster portion gathers the air-flow of the air outlet outflow from first blower, and the air-flow is in the negative pressure booster Negative pressure in portion is gradually increased along the direction of air-flow, and the kitchen ventilator is enabled to obtain better smoking effect.Further, institute Coupled logical static pressure forming portion can be flowed into from the negative pressure booster portion by stating air-flow, when the air-flow is in the negative pressure drainage When reaching flowing pressure balance in structure, static pressure section can be formed in the outlet of the static pressure forming portion, to be more advantageous to The flow for increasing air-flow, obtains better smoking effect.Further, by using the negative pressure drainage structure, can effectively subtract Few air-flow preferably optimizes the air draft smoking property of kitchen ventilator from the first blower of outflow to the windage loss during the second blower of inflow Energy.
Further, the negative pressure booster portion may include gradually reducing pipeline, and the gradually reducing pipeline is for introducing first wind The air-flow of the air outlet outflow of machine, and the cross-sectional area of the gradually reducing pipeline is gradually reduced along the flow direction of air-flow.This field skill Art personnel understand that the design of the gradually reducing pipeline, which can obtain, preferably holds together wind effect, also, is conducive to further increase and flow through The negative pressure of air-flow therein.
Further, the biggish air outlet open at one end towards first blower of cross-sectional area in the gradually reducing pipeline, Gas flow therein is flowed into increase, and realizes wind effect, while increasing the negative of the gas for flowing into the gradually reducing pipeline Pressure forms bigger negative pressure section by bigger cross-sectional area.
Further, the static pressure forming portion includes flaring pipeline, and the flaring pipeline is used for will be from the negative pressure booster portion The air-flow of outflow is exported to the air intake vent of second blower, and the cross-sectional area of the flaring pipeline along air-flow flow direction by It is cumulative big, to form and increase the static pressure for the air-flow for flowing through the flaring pipeline.Further, the design of the flaring pipeline can Increase the cross-sectional area of the outlet end of the flaring pipeline as far as possible, to increase as far as possible in the static pressure forming portion Export the static pressure section formed.
Further, the biggish air intake vent open at one end towards second blower of cross-sectional area in the flaring pipeline, A kind of structure of similar loudspeaker to be collectively formed with the gradually reducing pipeline, so that the import in the gradually reducing pipeline forms negative pressure, And static pressure is formed in the outlet of the flaring pipeline, to obtain bigger exhaust air rate, generate better smoking effect.Further, Using horn-like design, can the air-flow as much as possible by the outflow of the first blower be all brought to the negative pressure drainage knot Structure, to reduce windage loss when air-flow circulates between the first blower and the second blower;Also, the horn-like design is also Negative pressure section as big as possible can be formed in the air intake vent of the negative pressure drainage structure, and in the outlet air of the negative pressure drainage structure Mouth forms static pressure section as big as possible, to preferably promote the air flow rate for flowing through the negative pressure drainage structure, increases oil The exhaust air rate of smoke machine optimizes smoking effect.
Further, the negative pressure drainage structure further includes smooth transition structure, the both ends difference of the smooth transition structure It is connected to the outlet in the negative pressure booster portion and the import of static pressure forming portion, so that can from the air-flow that the negative pressure booster portion is flowed out It is smoothly flowed into the static pressure forming portion, it is ensured that the trend of the air-flow is not in additional interference.For example, when the negative pressure increases When the cross-sectional area of the outlet of splenium is different from the cross-sectional area of the import of static pressure forming portion, the smooth transition knot can be passed through Structure connects the outlet in the negative pressure booster portion and the import of static pressure forming portion, it is ensured that the smooth circulation of air-flow increases the stream of air-flow Coefficient of discharge.Further, by setting up the smooth transition structure between the negative pressure booster portion and static pressure forming portion, moreover it is possible to It is enough to increase the discharge coefficient for flowing through the air-flow of the negative pressure drainage structure, preferably enhance the smoking effect of kitchen ventilator.
Further, the constant cross-sectional area of the smooth transition structure, in the transversal of the outlet in the negative pressure booster portion Area and the cross-sectional area phase of the import of static pressure forming portion flow through the negative pressure drainage structure meanwhile, it is capable to increase to greatest extent Air-flow circulation, improve the discharge coefficient of air-flow.
Further, the cross-sectional area of the smooth transition structure is gradually increased from center to both ends, to ensure described in While the air-flow of the outlet outflow in negative pressure booster portion can smoothly flow into the import of the static pressure forming portion, further increase certainly The negative pressure of the air-flow of the outlet outflow in the negative pressure booster portion, while increasing the static pressure for flowing into the import of the static pressure forming portion, To obtain the supercharging effect of better negative pressure and static pressure, the smoking effect of kitchen ventilator is preferably improved.
Further, first blower is set in the negative pressure booster portion, uses the negative pressure drainage structure with optimization Kitchen ventilator overall structure, reduce described kitchen ventilator the space occupied, different application scenarios can be flexibly applied to.
Further, the two fans system further includes auxiliary negative pressure drainage structure, and the of the auxiliary negative pressure drainage structure The inlet communication of one end and the kitchen ventilator, the second end and the negative pressure drainage structure of the auxiliary negative pressure drainage structure connect Logical, the auxiliary negative pressure drainage structure, which is used to guide in the air-flow flowed into from first end, flows out to the negative pressure drainage through second end Structure, to further increase the air draught area of kitchen ventilator.
Further, the second end of the auxiliary negative pressure drainage structure is connected to the static pressure forming portion, will be from the oil The air-flow that the import of smoke machine introduces guides the static pressure forming portion into, to increase the gas flowed into from the auxiliary negative pressure drainage structure The static pressure of stream.
Further, first blower, negative pressure drainage structure and the second blower is bottom-up in the vertical direction is set to In the casing of the kitchen ventilator, with the circulation path of the most simplified air-flow to circulate in the two fans system, the gas is improved The air flow rate of stream increases the smoking effect of the kitchen ventilator using the two fans system.
Further, the two fans system can also include the first mounting disc of the import around the negative pressure booster portion, And the second mounting disc around the outlet of the static pressure forming portion, first mounting disc and second mounting disc are respectively provided with There are multiple through-holes, assist negative pressure section to be formed, so that (inlet side i.e. in the negative pressure booster portion is formed in existing negative pressure Negative pressure section) on the basis of, bigger negative pressure is formed, and further increase the air draught of the kitchen ventilator using the two fans system Area preferably promotes the discharge coefficient for flowing into the air-flow of the two fans system.
Further, first blower is crossflow fan, to make full use of the feature that its air quantity is big but negative pressure is small, is maximized The discharge coefficient of the air-flow of the two fans system is flowed into, the air flow rate for flowing into the negative pressure drainage structure is maximized.
Further, second blower is centrifugal blower, with the feature for making full use of its negative pressure Wind Volume small, is maximized certainly The negative pressure of the air-flow of the negative pressure drainage structure outflow, to strengthen the smoking ability of the kitchen ventilator using the two fans system.
The technical solution of the embodiment of the present invention also provides a kind of negative pressure drainage structure, including negative pressure booster portion and static pressure are formed The outlet in portion, the negative pressure booster portion is connected with the import of the static pressure forming portion;First blower is set to the negative pressure and increases In splenium, the air-flow of the air outlet outflow of first blower flows into the negative pressure booster portion and via the static pressure forming portion stream Out;Wherein, the negative pressure from the air-flow of the air outlet inflow of first blower in the negative pressure booster portion is along the direction of air-flow It is gradually increased, flows into the air-flow of the import of the static pressure forming portion in the static pressure forming portion from the outlet in the negative pressure booster portion Outlet form static pressure section.It will be appreciated by those skilled in the art that the negative pressure can be passed through using the scheme of the embodiment of the present invention Flow guiding structure rationally designs air-flow in specific trend wherein, and optimization is imitated using the air draught of the kitchen ventilator of the negative pressure drainage structure Fruit.Further, the negative pressure drainage structure gathers the air outlet outflow from first blower by the negative pressure booster portion Air-flow, and negative pressure of the air-flow in the negative pressure booster portion is gradually increased along the direction of air-flow, when the air-flow is from institute State negative pressure booster portion flow into coupled logical static pressure forming portion and reach flowing pressure balance when, can be formed in the static pressure The outlet in portion forms static pressure section, to be more advantageous to the flow for increasing air-flow, reduces windage loss, obtains better air draught effect Fruit.
Further, the negative pressure drainage structure further includes smooth transition structure, the both ends difference of the smooth transition structure It is connected to the outlet in the negative pressure booster portion and the import of static pressure forming portion, so that can from the air-flow that the negative pressure booster portion is flowed out It is smoothly flowed into the static pressure forming portion, it is ensured that the trend of the air-flow is not in additional interference.Further, by described The smooth transition structure is set up between negative pressure booster portion and static pressure forming portion, additionally it is possible to which increase flows through the negative pressure drainage structure Air-flow discharge coefficient, preferably enhance kitchen ventilator smoking effect.
Further, the scheme of the embodiment of the present invention also provides a kind of kitchen ventilator, including casing and above-mentioned two fans system. It will be appreciated by those skilled in the art that compared with existing kitchen ventilator, the kitchen ventilator of the two fans system by adopting the above technical scheme Smoking effect is more preferable, and energy consumption is lower, and muting function more preferably, can be to user with better usage experience.
Detailed description of the invention
Fig. 1 is a kind of kitchen ventilator of the embodiment of the present invention and its three-dimensional structure diagram of two fans system;
Fig. 2 is the schematic diagram of two fans system shown in Fig. 1 in the x direction;
Fig. 3 is a kind of three-dimensional structure diagram of negative pressure drainage structure of the embodiment of the present invention;
Fig. 4 is the assembly effect picture of the first blower and negative pressure drainage structure using the embodiment of the present invention;
Fig. 5 is the schematic diagram of Fig. 4 in y-direction;
Fig. 6 is the circulation schematic diagram in air-flow negative pressure drainage structure shown in Fig. 3;
Fig. 7 is the front view of another negative pressure drainage structure of the embodiment of the present invention;
Fig. 8 is the three-dimensional structure diagram of negative pressure drainage structure shown in Fig. 7;
Fig. 9 is the schematic diagram of Fig. 8 in a z-direction.
In attached drawing: 1- kitchen ventilator;11- casing;2- two fans system;The first blower of 21-;The second blower of 22-;21a- first The air intake vent of blower;The import of 1a- kitchen ventilator;The air outlet of the second blower of 22b-;The outlet of 1b- kitchen ventilator;3- negative pressure drainage Structure;The air outlet of the first blower of 21b-;The air intake vent of the second blower of 22a-;The outlet in 31b- negative pressure booster portion;32a- static pressure The import of forming portion;33- smooth transition structure;The import department in 311- negative pressure booster portion;The import in 31a- negative pressure booster portion;32b- The outlet of static pressure forming portion;The first mounting disc of 41-;The second mounting disc of 42-;5- through-hole;6- assists negative pressure drainage structure;61- is auxiliary Help the first end of negative pressure drainage structure;The second end of 62- auxiliary negative pressure drainage structure.
Specific embodiment
It will be appreciated by those skilled in the art that as described in the background art, existing kitchen ventilator gradually starts using two fans structure To which bigger exhaust air rate can be obtained, optimize the smoking effect of kitchen ventilator.For example, in existing two fans system, it is described The upper fan of two fans system and lower blower can use centrifugal blower;In another example the lower blower of the two fans system can To use centrifugal blower, and upper fan then uses crossflow fan;For another example the upper fan of the two fans system can using from Heart blower, lower blower then use crossflow fan;In another example the two fans system can also be the centrifugation wind of a shared motor Fan and cross flow fan etc..
But these two fans systems that the prior art uses do not account for the trend of the air-flow between two blowers, no Reasonable structure design most likely results in whole system smoking effect variation, to the kitchen ventilator using the two fans system Smoking effect has a negative impact.
In order to solve the above-mentioned technical problem, the technical solution of the embodiment of the present invention provides a kind of two fans for kitchen ventilator The inlet communication of system, including the first blower and the second blower, the air intake vent of first blower and the kitchen ventilator, described the The outlet of the air outlet of two blowers and the kitchen ventilator.The two fans system further include: negative pressure drainage structure, described The air-flow of the air outlet outflow of one blower flows into the air intake vent of second blower via the negative pressure drainage structure;Wherein, institute Stating negative pressure drainage structure includes negative pressure booster portion and static pressure forming portion, the outlet in the negative pressure booster portion and the static pressure forming portion Import be connected, the air-flow of the air outlet of first blower outflow flows into the negative pressure booster portion, and air-flow is described negative Negative pressure in pressure plenum is gradually increased along the direction of air-flow, and the air-flow of the static pressure forming portion outflow enters second blower Air intake vent, and air-flow forms static pressure section in the outlet of the static pressure forming portion.
Two fans system described in the embodiment of the present invention increases negative pressure drainage structure between main air blower and accessory fan, leads to The air-flow trend between two blowers of the negative pressure drainage reasonable structure design is crossed, optimizes the airflow channel of two fans system, subtracts Few windage loss, improves the smoking effect of the kitchen ventilator using two fans system described in the embodiment of the present invention.
Further, the two fans system gathers the air outlet outflow from first blower by the negative pressure booster portion Air-flow, and negative pressure of the air-flow in the negative pressure booster portion is gradually increased along the direction of air-flow, so that the oil smoke Machine can obtain better smoking effect.
Further, the air-flow can flow into coupled logical static pressure forming portion from the negative pressure booster portion, when described When air-flow reaches flowing pressure balance in the negative pressure drainage structure, static pressure can be formed in the outlet of the static pressure forming portion Section obtains better smoking effect to be more advantageous to the flow for increasing air-flow.
Further, by using the negative pressure drainage structure, air-flow can be effectively reduced from the first blower of outflow to inflow Windage loss during second blower preferably optimizes the air draft smoking performance of kitchen ventilator.
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention Specific embodiment explain in detail.
Fig. 1 is a kind of kitchen ventilator of the embodiment of the present invention and its three-dimensional structure diagram of two fans system.Wherein, the oil smoke Machine 1 may include casing 11;The two fans system 2 can be set in the casing 11.
Specifically, the two fans system 2 may include the first blower 21 and the second blower 22, institute combined with Figure 1 and Figure 2, The air intake vent 21a for stating the first blower 21 is connected to the import 1a of the kitchen ventilator 1, the air outlet 22b of second blower 22 with The outlet 1b of the kitchen ventilator 1 is connected to.
In one non-limiting embodiment, in response to pumping instruction (such as trigger and generate by button), it is set to institute The two fans system 2 stated in kitchen ventilator 1 starts operation, and air-flow enters in the kitchen ventilator 1 from the import 1a of the kitchen ventilator 1, And the air outlet of second blower 22 is flow to through the two fans system 2 via the air intake vent 21a of first blower 21 22b, and then the kitchen ventilator 1 is discharged via the outlet 1b of the kitchen ventilator 1.
More specifically, the two fans system 2 can also include negative pressure drainage structure 3, and first blower 21 goes out The air-flow of air port 21b outflow flows into the air intake vent 22a of second blower 22 via the negative pressure drainage structure 3.
It continuing to refer to figure 1 and Fig. 2, the negative pressure drainage structure 3 may include negative pressure booster portion 31 and static pressure forming portion 32, The outlet 31b in the negative pressure booster portion 31 is connected with the import 32a of the static pressure forming portion 32, and first blower 21 goes out The air-flow of air port 21b outflow flows into the negative pressure booster portion 31, and negative pressure of the air-flow in the negative pressure booster portion 31 is along air-flow Direction be gradually increased, the air-flow that the static pressure forming portion 32 flows out enters the air intake vent 22a of second blower 22, and air-flow Static pressure section is formed in the outlet 32b of the static pressure forming portion 32.
It will be appreciated by those skilled in the art that by the way that in first blower 21 (the main wind of the two fans system 2 can be considered as Machine) and the second blower 22 (accessory fan that the two fans system 2 can be considered as) between increase the negative pressure drainage structure 3, Air-flow can be rationally designed to move towards between two blowers, to optimize the airflow channel of the two fans system 2, reduce air-flow Loss improves the smoking effect of the kitchen ventilator 1 using two fans system 2 described in the embodiment of the present invention.
Further, the two fans system 2 can be gathered by the negative pressure booster portion 31 from first blower 21 Air outlet 21b outflow air-flow, the import 31a in the negative pressure booster portion 31 forms negative pressure section, and the air-flow exists Negative pressure in the negative pressure booster portion 31 can be gradually increased along the direction of air-flow, and the kitchen ventilator 1 is obtained more preferably Smoking effect.
Further, the air-flow can flow into coupled logical static pressure forming portion 32 from the negative pressure booster portion 31, It, being capable of going out in the static pressure forming portion 32 when the air-flow reaches flowing pressure balance in the negative pressure drainage structure 3 Mouth 32b forms static pressure section, to be more advantageous to the flow for increasing air-flow, obtains better smoking effect.Wherein, static pressure can also With referred to as static pressure or hydrostatic pressure, refer to fluid (such as gas) generated pressure when static inside hydrodynamics.
As a non-limiting embodiment, with reference to Fig. 1 and Fig. 2, first blower 21, negative pressure drainage structure 3 and Two blowers 22 can be in the vertical direction in the bottom-up casing 11 for being set to the kitchen ventilator 1, with most simplified described double The circulation path of the air-flow to circulate in blower fan system 2 improves the air flow rate of the air-flow, increases and uses the two fans system The smoking effect of 2 kitchen ventilator 1.
Alternatively, under the premise of guaranteeing that the flow direction of air-flow meets central idea described in technical solution of the embodiment of the present invention, Those skilled in the art can also adjust first blower 21, negative pressure according to the structure feature of the casing 11 of the kitchen ventilator 1 The set-up mode of flow guiding structure 3 and the second blower 22, it will not be described here.For example, if the casing 11 of the kitchen ventilator 1 is in level It places, then first blower 21, negative pressure drainage structure 3 and the second blower 22 can also laterally be set in turn in the casing 11 In, and the air intake vent 21a of first blower 21 is connected with the import 1a of the kitchen ventilator 1, second blower 22 Air outlet 22b is connected with the outlet 1b of the kitchen ventilator 1.
In one non-limiting embodiment, referring to figs. 2 and 3, the negative pressure booster portion 31 may include gradually reducing pipeline, The gradually reducing pipeline is used to introduce the air-flow of the air outlet 21b outflow of first blower 21, and the cross of the gradually reducing pipeline Sectional area is gradually reduced along the flow direction of air-flow, preferably holds together wind effect to obtain, also, be conducive to further increase flow through it is described The negative pressure of the air-flow of gradually reducing pipeline.
Further, the biggish outlet air open at one end towards first blower 21 of cross-sectional area in the gradually reducing pipeline Mouth 21b.For example, the gradually reducing pipeline can be pyramidal structure, and in the both-side opening of the pyramidal structure cross-sectional area compared with A big side opening is towards the air outlet 21b of first blower 21, that is, the gradually reducing pipeline can be in the stream of the air-flow It is in inverted cone-shaped structure on dynamic direction, flows into gas flow therein to increase, and realize wind effect, while increasing and flowing into institute The negative pressure for stating the gas of gradually reducing pipeline forms bigger negative pressure section by bigger cross-sectional area.
In one non-limiting embodiment, the static pressure forming portion 32 may include flaring pipeline, the flaring pipeline For exporting the air-flow flowed out from the negative pressure booster portion 32 to the air intake vent 22a of second blower 22, and it is described gradually The cross-sectional area in expander road is gradually increased along the flow direction of air-flow, with formed and increased flow through the flaring pipeline air-flow it is quiet Pressure.Further, the design of the flaring pipeline can increase the cross-sectional area of the outlet end of the flaring pipeline as far as possible, from And increase as far as possible in the static pressure section that the outlet 32b of the static pressure forming portion 32 is formed.
Further, the biggish inlet air open at one end towards second blower 22 of cross-sectional area in the flaring pipeline Mouth 22a.For example, the flaring pipeline may be pyramidal structure, and cross-sectional area in the both-side opening of the pyramidal structure A biggish side opening is towards the air intake vent 22a of second blower 22, that is, the flaring pipeline can be in the air-flow It is in positive cone structure on flow direction, a kind of structure of similar loudspeaker to be collectively formed with the gradually reducing pipeline, thus described The import of gradually reducing pipeline forms negative pressure, and is gradually increased static pressure along the direction of the flaring pipeline towards outlet, bigger to obtain Exhaust air rate, generate better smoking effect.
By upper, negative pressure drainage structure 3 described in the embodiment of the present invention, can be as more as possible by using horn-like design The air-flow for flowing out the first blower 21 be all brought to the negative pressure drainage structure 3, to reduce air-flow in the first blower 21 And the second windage loss when circulating between blower 22;Also, the horn-like design can also be in the negative pressure drainage structure 3 Air intake vent (the import 31a in the i.e. described negative pressure booster portion 31) forms negative pressure section as big as possible, and in the negative pressure drainage knot The air outlet (the outlet 32b of the i.e. described static pressure forming portion 32) of structure 3 forms static pressure section as big as possible, to preferably be promoted The air flow rate of the negative pressure drainage structure 3 is flowed through, the exhaust air rate of kitchen ventilator 1 is increased, optimizes smoking effect.
As a non-limiting embodiment, the negative pressure drainage structure 3 can also include smooth transition structure 33, described The both ends of smooth transition structure 33 are respectively communicated with the import 32a of the outlet 31b and static pressure forming portion 32 in the negative pressure booster portion 31, So as to which the static pressure forming portion 32 can be smoothly flowed into from the air-flow that the negative pressure booster portion 31 is flowed out, it is ensured that the air-flow Trend is not in additional interference.
For example, when the cross-sectional area of the outlet 31b in the negative pressure booster portion 31 is different from the import 32a of static pressure forming portion 32 Cross-sectional area when, the outlet 31b and static pressure shape in the negative pressure booster portion 31 can be connected by the smooth transition structure 33 At the import 32a in portion 32, it is ensured that the smooth circulation of air-flow increases the discharge coefficient of air-flow.
Further, by setting up the smooth transition structure between the negative pressure booster portion 31 and static pressure forming portion 32 33, additionally it is possible to increase the discharge coefficient for flowing through the air-flow of the negative pressure drainage structure 3, preferably enhance the suction of the kitchen ventilator 1 Cigarette effect.
In a preferred embodiment, when the cross-sectional area for exporting 31b and static pressure forming portion 32 in the negative pressure booster portion 31 When the cross-sectional area of import 32a is identical, the cross-sectional area of the smooth transition structure 3 can be constant, to increase to greatest extent The circulation for flowing through the air-flow of the negative pressure drainage structure 3, improves the discharge coefficient of air-flow.
As a change case, the cross-sectional area of the smooth transition structure 3 can also be gradually increased from center to both ends, With ensure the air-flow flowed out from the outlet 31b in the negative pressure booster portion 31 can smoothly flow into the static pressure forming portion 32 into While mouth 32a, the negative pressure of the air-flow of the outlet 31b outflow from the negative pressure booster portion 31 is further increased, while increasing stream The static pressure for entering the import 32a of the static pressure forming portion 32 is preferably improved with obtaining the supercharging effect of better negative pressure and static pressure The smoking effect of kitchen ventilator.
As a non-limiting embodiment, first blower 21 be can be set in the negative pressure booster portion 31, with Preferably reduce windage loss.For example, with reference to Fig. 3, first blower 21 can be set in the negative pressure booster portion 31 into Oral area 311 reduces what the kitchen ventilator 1 occupied to optimize the overall structure of the kitchen ventilator 1 using the negative pressure drainage structure 3 Space can be flexibly applied to different application scenarios.
As a non-limiting embodiment, with reference to Fig. 3 to Fig. 5, the two fans system 2 can also include around described The first mounting disc 41 of the import 31a (the air intake vent 21a of i.e. described first blower 21) in negative pressure booster portion 31, and around described The second mounting disc 42 of the outlet 32b of static pressure forming portion 32, first mounting disc 41 and second mounting disc 42 are respectively provided with There are multiple through-holes 5, negative pressure section is assisted to be formed, thus in existing negative pressure (i.e. in the import 31a shape in the negative pressure booster portion 31 At negative pressure section) on the basis of, form bigger negative pressure, and further increase the kitchen ventilator 1 using the two fans system 2 Air draught area, preferably promote the discharge coefficient for flowing into the air-flow of the two fans system 2.
As a non-limiting embodiment, first blower 21 can be crossflow fan, to make full use of its air quantity Big but small negative pressure feature maximizes the discharge coefficient for flowing into the air-flow of the two fans system 2, maximizes and flows into the negative pressure The air flow rate of flow guiding structure 3.
As a non-limiting embodiment, second blower 22 can be centrifugal blower, to make full use of its negative pressure The small feature of Wind Volume maximizes the negative pressure of the air-flow flowed out from the negative pressure drainage structure 3, uses the two fans to strengthen The smoking ability of the kitchen ventilator 1 of system 2.As a change case, second blower 22 or crossflow fan, with more preferable The saving kitchen ventilator 1 occupied area.
For example, first blower 21 (such as crossflow fan) is embedded in the negative pressure booster portion 31, when described with reference to Fig. 1 and 9 After first blower 21 (and/or second blower 22) starts running, in air intake vent (the i.e. described negative pressure of the negative pressure drainage structure 3 The import 31a of plenum 31 can be referred to as B wind area) negative pressure is formed, so that air is inhaled into the negative pressure drainage structure 3, and And since the negative pressure booster portion 31 is in inverted cone-shaped structure, the air-flow being inhaled into enters the negative pressure through first blower 21 and increases Splenium 31, and negative pressure booster area is formed in the bottom half of the negative pressure drainage structure 3.Further, air-flow flows through described smooth After transition structure 33, the discharge coefficient of the air-flow is increased in the upper half of the negative pressure drainage structure 3, reaches described the After the air intake vent 22a of two blowers 22 (such as centrifugal blower), under the action of the second blower 22, the air-flow of big flow is pressed greatly The centrifuge of force coefficient acts on, so that being enhanced using the smoking effect of the kitchen ventilator 1 of the negative pressure drainage structure 3.
Further, first mounting disc 41 and are additionally provided in negative pressure drainage structure 3 used by the present embodiment Two mounting discs 42 both offer multiple through-holes 5, described after first blower 21 (and/or second blower 22) is opened First mounting disc 41 and the second mounting disc 42 can cooperatively form A wind area and C wind area, to further increase capacity.Specifically, The flowing of air-flow, the through-hole 5 in first mounting disc 41 can form negative pressuren zone in the bottom half in A wind area and C wind area Between, to preferably enhance the negative pressure drainage effect in B wind area.Further, through the through-hole 5 in first mounting disc 41 The air-flow for sucking the negative pressure drainage structure 3 can be discharged via the through-hole 5 in second mounting disc 42, enter institute to increase State the gas flow of the air intake vent 22a of the second blower 22.
As a non-limiting embodiment, with reference to Fig. 7 to Fig. 9, the two fans system 2 can also include auxiliary negative pressure The first end 61 of flow guiding structure 6, the auxiliary negative pressure drainage structure 6 can be connected to the import 1a of the kitchen ventilator 1, described auxiliary Helping the second end 62 of negative pressure drainage structure 6 can be connected to the negative pressure drainage structure 3, and the auxiliary negative pressure drainage structure 6 can To flow out to the negative pressure drainage structure 3 through second end 62 for guiding the air-flow flowed into from first end 61, further to increase The air draught area of oiling smoke machine 1.
Further, the second end 62 of the auxiliary negative pressure drainage structure 6 can be connected to the static pressure forming portion 32, with The air-flow introduced from the import 1a of the kitchen ventilator 1 is guided into the static pressure forming portion 32, to increase from the auxiliary negative pressure The static pressure for the air-flow that flow guiding structure 62 flows into.
In a preferred embodiment, can also be added in the auxiliary negative pressure drainage structure 6 aspiration pump (alternatively referred to as tap, It is not shown), to promote air-flow suction, preferably enhance the smoking effect of kitchen ventilator 1.
Alternatively, it is described auxiliary negative pressure drainage structure 6 second end 62 can also directly with the static pressure forming portion 32 go out The air-flow introduced from the import 1a of the kitchen ventilator 1, is directed directly to the air intake vent of second blower 22 by mouth 32b connection 22a。
Further, with reference to Fig. 3 to Fig. 5, the technical solution of the embodiment of the present invention also provides a kind of negative pressure drainage knot 3, institute Stating negative pressure drainage structure 3 may include negative pressure booster portion 31 and static pressure forming portion 32, and the outlet 31b in the negative pressure booster portion 31 can To be connected with the import 32a of the static pressure forming portion 32.Further, the negative pressure drainage structure 3 can also include first Blower 21 is set in the negative pressure booster portion 31, and the air-flow of the air outlet 21b outflow of first blower 21 flows into described negative It presses plenum 31 and is flowed out via the static pressure forming portion 32;Wherein, the gas flowed into from the air outlet 21b of first blower 21 The negative pressure flowed in the negative pressure booster portion 31 is gradually increased along the direction of air-flow, the outlet 31b from the negative pressure booster portion 31 The air-flow for flowing into the import 32a of the static pressure forming portion 32 forms static pressure section in the outlet of the static pressure forming portion 32.
It will be appreciated by those skilled in the art that for originally only with the kitchen ventilator of a blower, it can be above-mentioned negative by adding The mode of flow guiding structure 3 is pressed to form two fans system described in above-described embodiment, to enhance the smoking effect of kitchen ventilator.
Further, the negative pressure drainage structure 3 can also include smooth transition structure 33, the smooth transition structure 33 Both ends be respectively communicated with the negative pressure booster portion 31 outlet 31b and static pressure forming portion 32 import 32a so that from the negative pressure The air-flow that plenum 31 flows out can be smoothly flowed into the static pressure forming portion 32, it is ensured that the trend of the air-flow is not in volume Outer interference.
It will be appreciated by those skilled in the art that described suitable by being set up between the negative pressure booster portion 31 and static pressure forming portion 32 Sliding transition structure 33, additionally it is possible to increase the discharge coefficient for flowing through the air-flow of the negative pressure drainage structure 3, preferably be additionally arranged The smoking effect of the kitchen ventilator of the negative pressure drainage structure 3.
Further, the smoking effect using the kitchen ventilator 1 of two fans system 2 described in the embodiment of the present invention is more preferable, and Energy consumption is lower, and muting function more preferably, can be to user with better usage experience.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute Subject to the range of restriction.

Claims (18)

1. one kind is used for the two fans system (2) of kitchen ventilator (1), including the first blower (21) and the second blower (22), described the The air intake vent (21a) of one blower (21) is connected to the import (1a) of the kitchen ventilator (1), the air outlet of second blower (22) (22b) is connected to the outlet (1b) of the kitchen ventilator (1), which is characterized in that further include:
Negative pressure drainage structure (3), the air-flow of air outlet (21b) outflow of first blower (21) is via the negative pressure drainage knot Structure (3) flows into the air intake vent (22a) of second blower (22);
Wherein, the negative pressure drainage structure (3) includes negative pressure booster portion (31) and static pressure forming portion (32), the negative pressure booster portion (31) outlet (31b) is connected with the import (32a) of the static pressure forming portion (32), the air outlet of first blower (21) The air-flow of (21b) outflow flows into the negative pressure booster portion (31), and negative pressure of the air-flow in the negative pressure booster portion (31) is along gas The direction of stream is gradually increased, and the air-flow of static pressure forming portion (32) outflow enters the air intake vent of second blower (22) (22a), and air-flow forms static pressure section in the outlet (32b) of the static pressure forming portion (32).
2. two fans system (2) according to claim 1, which is characterized in that the negative pressure booster portion (31) includes tapered Pipeline, the gradually reducing pipeline are used to introduce the air-flow of air outlet (21b) outflow of first blower (21), and described tapered The cross-sectional area of pipeline is gradually reduced along the flow direction of air-flow.
3. two fans system (2) according to claim 2, which is characterized in that cross-sectional area is larger in the gradually reducing pipeline The air outlet (21b) open at one end towards first blower (21).
4. two fans system (2) according to claim 1, which is characterized in that the static pressure forming portion (32) includes flaring Pipeline, the flaring pipeline is for exporting the air-flow flowed out from the negative pressure booster portion (31) to second blower (22) Air intake vent (22a), and the cross-sectional area of the flaring pipeline is gradually increased along the flow direction of air-flow.
5. two fans system (2) according to claim 4, which is characterized in that cross-sectional area is larger in the flaring pipeline The air intake vent (22a) open at one end towards second blower (22).
6. two fans system (2) according to claim 1, which is characterized in that the negative pressure drainage structure (3) further includes suitable Sliding transition structure (33), the both ends of the smooth transition structure (33) are respectively communicated with the outlet of the negative pressure booster portion (31) The import (32a) of (31b) and static pressure forming portion (32).
7. two fans system (2) according to claim 6, which is characterized in that the smooth transition structure (33) it is transversal Constant area.
8. two fans system (2) according to claim 6, which is characterized in that the smooth transition structure (33) it is transversal Area is gradually increased from center to both ends.
9. two fans system (2) according to claim 1, which is characterized in that first blower (21) is set to described In negative pressure booster portion (31).
10. two fans system (2) according to claim 1, which is characterized in that it further include auxiliary negative pressure drainage structure (6), The first end (61) of auxiliary negative pressure drainage structure (6) is connected to the import (1a) of the kitchen ventilator (1), the auxiliary negative pressure The second end (62) of flow guiding structure (6) is connected to the negative pressure drainage structure (3), and the auxiliary negative pressure drainage structure (6) is used for The air-flow flowed into from first end (61) is guided and flows out to the negative pressure drainage structure (3) through second end (62).
11. two fans system (2) according to claim 10, which is characterized in that auxiliary negative pressure drainage structure (6) Second end (62) is connected to the static pressure forming portion (32).
12. two fans system (2) according to claim 1, which is characterized in that first blower (21), negative pressure drainage Structure (3) and the second blower (22) are in the vertical direction in the bottom-up casing (11) for being set to the kitchen ventilator (1).
13. two fans system (2) according to any one of claim 1 to 12, which is characterized in that further include: around institute The first mounting disc (41) of the import (31a) of negative pressure booster portion (31) is stated, and around the outlet of the static pressure forming portion (32) Second mounting disc (42) of (32b), first mounting disc (41) and second mounting disc (42) are provided with multiple through-holes (5), negative pressure section is assisted to be formed.
14. two fans system (2) according to any one of claim 1 to 12, which is characterized in that first blower It (21) is crossflow fan.
15. two fans system (2) according to any one of claim 1 to 12, which is characterized in that second blower It (22) is centrifugal blower.
16. a kind of negative pressure drainage structure (3) characterized by comprising
Negative pressure booster portion (31) and static pressure forming portion (32), the outlet (31b) and the static pressure shape of the negative pressure booster portion (31) It is connected at the import (32a) of portion (32);
First blower (21) is set in the negative pressure booster portion (31), air outlet (21b) outflow of first blower (21) Air-flow flow into the negative pressure booster portion (31) and flowed out via the static pressure forming portion (32);
Wherein, air-flow the bearing in the negative pressure booster portion (31) flowed into from the air outlet (21b) of first blower (21) Pressure is gradually increased along the direction of air-flow, flows into the static pressure forming portion (32) from the outlet (31b) of the negative pressure booster portion (31) Import (32a) air-flow the static pressure forming portion (32) outlet (32b) formed static pressure section.
17. negative pressure drainage structure (3) according to claim 16, which is characterized in that further include:
Smooth transition structure (33), the both ends of the smooth transition structure (33) are respectively communicated with going out for the negative pressure booster portion (31) The import (32a) of mouth (31b) and static pressure forming portion (32).
18. a kind of kitchen ventilator (1), including casing (11), which is characterized in that further include: any one of the claims 1 to 15 The two fans system (2).
CN201710729210.8A 2017-08-23 2017-08-23 A kind of kitchen ventilator and its two fans system, negative pressure drainage structure Pending CN109425000A (en)

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Application publication date: 20190305