CN1186565C

CN1186565C - Air discharging cover for oil soot exhauster

Info

Publication number: CN1186565C
Application number: CNB021123489A
Authority: CN
Inventors: 茅忠群
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2002-07-01
Filing date: 2002-07-01
Publication date: 2005-01-26
Anticipated expiration: 2022-07-01
Also published as: CN1391066A

Abstract

The present invention relates to an exhaust hood for kitchen ventilators. The present invention comprises a hood body and an inverted valve plate, wherein the inverted valve plate is arranged in the hood body. The present invention is characterized in that the inverted valve plate is a thin plate matched with a mouth of an enhaust hood, an inverted valve is fixed to a rotating shaft which penetrates through the exhaust hood and is driven by a driving mechanism, the inner walls of the exhaust hood on both sides of the rotating shaft are respectively provided an upper limiting step and a lower limiting step, the upper limiting step is slightly above the rotating shaft, the lower limiting step is slightly below the rotating shaft, the inverted valve is carried out an upper limitation and a lower limitation relative to the edges of both sides of the rotating shaft, and the inverted valve plate can be opened only in one rotating direction from the closed state. Because both the opening and the closing of the inverted valve plate are completed by the drive mechanism instead of the passive opening by the exhausted oil fume and the passive closing caused by self weight or balance weight, the present invention effectively avoids the accidental opening or accidental closing; even when the present invention is applied to common flues, the present invention can also effectively prevent oil fume from flowing back, and meanwhile, the present invention ensure the oil fume exhausting efficiency of the kitchen ventilator unaffected.

Description

A kind of outlet housing that is used for range hood

Technical field

The present invention relates to a kind of installation component of range hood, especially a kind of outlet housing that is used for range hood.

Background technique

Nowadays, range hood has become one of requisite household electrical appliances in the life of urban resident, its function is indoor oil smoke is siphoned away and to be discharged outdoor by the smoke vent on the wall, during installation, generally link to each other with smoke vent by the outlet of airduct with kitchen ventilator, by present house architectural structure, the position of smoke vent roughly has two kinds, a kind of is directly to connect to outdoor, this just need prevent that rainwater from pouring in down a chimney and flying bird is strayed into, another kind is to connect to the public flue of building, this just need prevent that the cigarette in the flue from pouring in down a chimney, also be that both all need install the device that is equivalent to check valve additional in the cooking-fume discharging passage, for the former, but generally install an air door with a plurality of folding valve blocks additional and realize by stretch out an outdoor end at airduct, " range hood air door " as No. 90213912.6, Chinese utility model patent, 90222708.4 number " range hood air duct air door " and No. 90224691.7 " range hood air duct air door " such device is all disclosed, its principle is when range hood is not worked, each valve block of air door is in closed condition by deadweight or counterweight, and when range hood was worked, the outside air-flow that blower fan produces rotation automatically blew valve block open and discharges fume; And for the latter, then generally on the outlet housing that connects between cooking-fume exhauster blower outlet and the airduct, be provided with, its structure and aforesaid air door are similar, yet because public flue is equivalent to a built-in chimney, wherein can produce certain negative pressure naturally, the valve block that is arranged on the outlet housing is opened automatically, thereby down draught appears, scurry cigarette and scurry phenomenon such as flavor, and after the long-term use of range hood, the valve block that is arranged on the outlet housing might come off, can cause that also oil smoke pours in down a chimney, on the other hand, after long-term the use, on the valve block on the outlet housing easily because of being stained with the phenomenon that greasy thing can't free folding, thereby influenced the discharging of oil smoke, the working efficiency of range hood is reduced.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of at above-mentioned phenomenon can effectively prevent the ventilator air outlet cover that oil smoke pours in down a chimney and smoke discharging effect is good.

The present invention solves the problems of the technologies described above the technological scheme that is adopted: this outlet housing that is used for range hood comprises the non-return valve block that is positioned at cover body and sets within it, it is characterized in that described non-return valve block is a thin plate that matches with outlet housing degree of lip-rounding shape, described check valve is fixed on one radially to be run through in outlet housing and the rotating shaft by driving mechanism drive, and on the outlet housing inwall of rotating shaft both sides, relatively be provided with a little more than its upper limit step with a little less than its lower limit step, make the edge of the relative rotating shaft of non-return valve block both sides obtain upper limit and lower limit respectively, even also non-return valve block can only be opened through a sense of rotation from its closed condition, and described upper limit step and lower limit step are formed by two convex tendons that are oppositely arranged.

Certain described upper limit step and lower limit step also can form naturally by the different wall of outlet housing corresponding position;

Described upper limit step and lower limit step can be provided with several projectioies on the table top that contacts with non-return valve block, to reduce the area of contact between the two, promptly reduce the greasy dirt adhesion of contacting point.

Described rotating shaft driving mechanism can be a stepper motor, and its output shaft directly or by driving mechanism links to each other with rotating shaft indirectly;

Described rotating shaft driving mechanism can be one to have the solenoid valve of flexible output core bar, and its output core bar can drive rotating shaft by a pivoted housing and rotate, and also can directly link to each other with the overhanging end of rotating shaft, and at this moment, this overhanging end of rotating shaft roughly is " Z " type crank shape; Described solenoid valve can be selected the type of automatically reseting for use, also be that its core bar can stretch automatically and resets and drive rotating shaft and non-return valve block resets, also can select non-automatic position restoring for use, can make the spring that rotating shaft resets or outside described pivoted housing, realize resetting of non-return valve block around a Returnning spring and be fixed with by the other end in rotating shaft.

Compared with prior art, the invention has the advantages that: because the folding of non-return valve block is initiatively finished by driving mechanism, but not by the passive unlatching of institute's cooking-fume discharging and the passive closure that causes by deadweight or counterweight, thereby unexpected unlatching or unexpected closed generation have been prevented effectively, can prevent effectively that also oil smoke from pouring in down a chimney even be applied to public flue occasion, guarantee that also the cooking-fume discharging efficient of range hood is unaffected simultaneously.

Description of drawings

Fig. 1 is in perspective view under the half-open position for the embodiment of the invention one at non-return valve block.

Fig. 2 is in perspective view under the closed condition for the embodiment of the invention one at non-return valve block.

Fig. 3 is the structure cross-sectional schematic of the embodiment of the invention one.

Fig. 4 is the enlarged view of I portion among Fig. 3.

Fig. 5 is the perspective view of outlet housing cover body.

Fig. 6 is the structure cross-sectional schematic of the embodiment of the invention two.(external Returnning spring)

Fig. 7 is the structure cross-sectional schematic of the embodiment of the invention three.(pivoted housing)

Fig. 8 is the perspective view of the embodiment of the invention four.(stepper motor)

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

First embodiment such as Fig. 1 and shown in Figure 5, outlet housing comprises intake grill, exhaust outlet and the non-return valve block 1 that is positioned on the outlet housing inwall, this non-return valve block 1 is a thin plate that matches with the outlet housing shape, it in the present embodiment circular sheet, it is fixed in the rotating shaft 4, this rotating shaft overhanging end roughly is " Z " type crank shape, the end of " Z " type crank shape links to each other with driving mechanism, the other end radially runs through outlet housing, driving mechanism in the present embodiment is one to have the solenoid valve 6 of flexible output core bar 5, " Z " type crank shape end of rotating shaft 4 links to each other with core bar 5, solenoid valve 6 is selected the type of automatically reseting for use, also is that its core bar 5 can stretch automatically and resets and drive rotating

shaft

4 and 1 of check valve resets; On the outlet housing inwall of rotating shaft 4 both sides, relatively be provided with a little more than its upper limit convex tendon 2 with a little less than its lower limit convex tendon 3, also non-return valve block 1 make the edge of non-return valve block 1 phase countershaft 4 both sides obtain upper limit and lower limit respectively, even can only be opened through a sense of rotation from its closed condition; With also be provided with on 3 of the non-return valve block 1 contacted upper limit convex tendons 2, lower limit convex tendon a plurality of protruding 7, in order to reduce the area of contact between the two.

When range hood uses, blower fan begins to rotate, connect solenoid valve 6 coils simultaneously, make electromagnetic valve coil and armature adhesive, armature drives core bar 5 and moves downward, drive rotating shaft 4 rotation simultaneously, make the non-return valve block 1 that is fixed in the rotating shaft 4 go to plumbness by level, oil smoke can be smooth and easy from outlet housing by and final the discharge.When range hood is closed, blower fan quits work, solenoid valve 6 coil losing electricities thereupon, core bar automatically resets, and drive non-return valve block 1 and be back to level by plumbness and close, owing on the outlet housing inwall, be provided with upper and lower

spacing convex tendon

2,3, can locate non-return valve block 1, make it stop at level very soon and seal up the outlet housing mouth.

Second embodiment sees Fig. 6, be that with first embodiment's difference automatically reseting of core bar 5 is to realize by spring 8 is set under the armature in the driving mechanism, behind solenoid valve 6 coil losing electricities, make armature have the trend of automatically reseting by this spring 8, for the sake of security, outside solenoid valve 6 and core bar 5, be coated with a case, and in order to make non-return valve block 1 that better windproof effect be arranged, be provided with Returnning spring 9 between rotating shaft 4 one ends and outlet housing intake grill, this Returnning spring 9 has makes non-return valve block 1 be in the trend of level.When range hood is closed, the dead electricity of solenoid valve 6 coils thereupon, discharge armature, the core bar 5 that links to each other with armature is under the effect of spring 8 and Returnning spring 9, return again faster, this makes non-return valve block be back to level 1 within a short period of time and closes, if extraneous wind-force etc. will be opened non-return valve block, must overcome the active force of spring 8 and Returnning spring 9 simultaneously, so difficulty is opened non-return valve block 1 under the range hood closed condition, the external world was had under the situation of large wind, also can't open non-return valve block 1 and reach the purpose of keeping out the wind.

The 3rd embodiment sees Fig. 7, be " one " type with first embodiment's difference in rotating shaft 4, the other end of rotating shaft 4 and pivoted housing 12 fix, pivoted housing 12 can rotate around a dead axle 11, dead axle 11 be fixed on the Safety cap body and with rotating shaft 4 in line, be around with the Returnning spring 10 that links to each other with core bar 5 at pivoted housing 12, when range hood uses, solenoid valve 6 coils overcome the active force of spring 8 and Returnning spring 10, with the armature adhesive, armature drives core bar 5 and moves downward, and spurs Returnning spring 10 simultaneously pivoted housing 12 is rotated, rotate with the rotating shaft 4 that pivoted housing 12 fixes thereupon, non-return valve block 1 is opened; When blower fan quits work, solenoid valve 6 coil losing electricities discharge armature, and armature is accelerated to answer back in the restoring force effect of spring 8 and Returnning spring 10, and non-return valve block 1 is closed.

The 4th embodiment sees Fig. 8, be that with first embodiment's difference driving mechanism is one to be fixed on the stepper motor 13 on the support, the output shaft of stepper motor 13 is connected with rotating shaft 4, when range hood is worked, rotate 90 ° with computer control step motor 13, stepper motor 13 rotates 1 rotation of drive check valve sheet and opens in vertical state for 90 °, otherwise, close stepper motor 13, non-return valve block 1 is the level of state and closure.

Claims

1, a kind of outlet housing that is used for range hood, comprise the non-return valve block that is positioned at cover body and sets within it, it is characterized in that described non-return valve block is a thin plate that matches with outlet housing degree of lip-rounding shape, described check valve is fixed on one radially to be run through in outlet housing and the rotating shaft by driving mechanism drive, and on the outlet housing inwall of rotating shaft both sides, relatively be provided with a little more than its upper limit step with a little less than its lower limit step, make the edge of the relative rotating shaft of non-return valve block both sides obtain upper limit and lower limit respectively, even also non-return valve block can only be opened through a sense of rotation from its closed condition, and described upper limit step and lower limit step are formed by two convex tendons that are oppositely arranged.

2, the outlet housing that is used for range hood according to claim 1 is characterized in that described upper limit step and the lower limit step table top that contacts with non-return valve block is provided with several projectioies.

3, the outlet housing that is used for range hood according to claim 1 and 2 is characterized in that described rotating shaft driving mechanism is a stepper motor.

4, the outlet housing that is used for range hood according to claim 1 and 2 is characterized in that described rotating shaft driving mechanism is one to have the solenoid valve of flexible output core bar.

5, the outlet housing that is used for range hood according to claim 4 is characterized in that described rotating shaft overhanging end roughly is " Z " type crank shape, described solenoid valve core bar and its terminal linking to each other.

6, the outlet housing that is used for range hood according to claim 5 is characterized in that described rotating shaft is fixed with a Returnning spring at the other end.

7, the outlet housing that is used for range hood according to claim 4 is characterized in that described solenoid valve core bar drives rotating shaft by a pivoted housing and rotates.

8, the outlet housing that is used for range hood according to claim 7 is characterized in that described pivoted housing is around with a Returnning spring.

9, a kind of outlet housing that is used for range hood, comprise the non-return valve block that is positioned at cover body and sets within it, it is characterized in that described non-return valve block is a thin plate that matches with outlet housing degree of lip-rounding shape, described check valve is fixed on one radially to be run through in outlet housing and the rotating shaft by driving mechanism drive, and on the outlet housing inwall of rotating shaft both sides, relatively be provided with a little more than its upper limit step with a little less than its lower limit step, make the edge of the relative rotating shaft of non-return valve block both sides obtain upper limit and lower limit respectively, even also non-return valve block can only be opened through a sense of rotation from its closed condition, and described upper limit step and lower limit step are formed naturally by the different wall of outlet housing corresponding position.