CN1084853C

CN1084853C - Valve device

Info

Publication number: CN1084853C
Application number: CN96108071A
Authority: CN
Inventors: 平敷健一; 村田泰清; 幡中秀治
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 1995-04-24
Filing date: 1996-04-24
Publication date: 2002-05-15
Anticipated expiration: 2016-04-24
Also published as: JP2968450B2; CN1141402A; JPH08296747A; KR100213400B1; KR960038199A

Abstract

The invention provides a valve device for making fluid easy to flow out of a liquid supply port without enlarging the shifting stroke of a valve. A cap 41 installed on the tank 39 for reserving water provided with a valve seat 43, where a water supply port 42 is made, in condition of being inclined to horizontal direction. The water supply port 42 is opened from above by the valve 48 of the valve body 44. It follows that a film formed between the valve 48 and the valve seat 43 is made by the surface tension of water, accompanying the opening of the valve 48, but this film is asymmetrical above and below the valve seat 43, and the balance is lost, and it is apt to break from the lower weak place where water pressure is applied, so water is easy to flow out from the water supply port 42 without enlarging the shifting stroke of the valve 48.

Description

Control valve unit

The present invention relates to a kind of by valve being moved up and down open and close the control valve unit of feeding mouth.

Figure 13 has represented the control valve unit of the feed trough in a kind of automatic ice-making plant that is arranged on refrigerator in the past.Among the figure, in the bottom of groove 1, highlightedly tube cylindraceous portion 2 is being set, in this one 2, can tighten cap 3 with unloading.Central part at cap 3 is being provided with the valve seat 5 that has the admission port 4 that is made into circle.And valve body 8 with valve shaft 6 and circular valve 7 is being set and on cap 3 the pressure spring of valve body 8 bullets to closing direction (downwards).Valve shaft 6 can be provided with along the vertical direction movably with respect to valve seat 5; Valve 7 is installed in the underpart of this valve shaft 6, is used for from upper switch admission port 4.

In said structure, the underpart of valve shaft 6 is pushed to, valve body 8 just with respect to valve seat 5 be moved upward, valve 7 breaks away from the peripheral portion of admission port 4, thereby (with reference to the double dot dash line part) opened in admission port 4.When admission port 4 is opened, be stored in groove 1 interior water and just pass through the gap between admission port 4 peripheral portions and the

valve

7,4 flow out downwards from the admission port.

But, in this structure, valve 7 with respect to admission port 4 when opening direction and move, as shown in figure 14, between the upper surface of the lower surface of valve 7 and valve seat 5, because of the surface tension of water, form film A.During this film A formed, the water from the admission port in 4 grooves that flow out 1 was subjected to stopping of film A, and A breaks along with film, just 4 outflows from the admission port of the water in the groove cylinder 1.

But, in this structure in the past, the shape of valve 7 and valve seat 5 all is that the center with respect to admission port 4 becomes symmetry, when valve 7 was opened, the gap between admission port 4 peripheral portions and the valve 7 roughly was certain on periphery entirely.Therefore, the center that the film A that forms between the upper surface of the lower surface of valve 7 and valve seat 5 becomes with admission port 4 is the concentric circles in the center of circle, and roughly certain intensity is arranged on whole periphery, therefore is difficult to break, and 4 flows out from the admission port and water is just difficult.Former, break easily in order to make film A, must guarantee that the shift motion of valve 7 is big, so, just essential for valve body 8 is set with bigger space.

The purpose of this invention is to provide a kind of valve shift motion that needn't increase and just can easily make the control valve unit of liquid from the outflow of feeding mouth.

In order to achieve the above object, the 1st kind of control valve unit of the present invention have be configured in the groove cylinder bottom of storing liquid and form the valve seat of feeding mouth and can move up and down with respect to this valve seat, by contacting with the peripheral portion of above-mentioned feeding mouth the feeding mouth is closed and, it is characterized in that making above-mentioned valve seat to be inclined relative to horizontal by the valve that the peripheral portion that upwards breaks away from the feeding mouth is opened the feeding mouth from the top.

For achieving the above object, the 2nd kind of control valve unit of the present invention have be configured in the groove cylinder bottom of storing liquid and form the valve seat of feeding mouth and can move up and down with respect to this valve seat, by contacting with the peripheral portion of above-mentioned feeding mouth the feeding mouth closed and by the valve that the peripheral portion that breaks away from the feeding mouth is upward opened the feeding mouth from the top, it is characterized in that at above-mentioned valve the bottom, be provided with teat in the inboard that when this valve is in closed condition, is positioned at above-mentioned feeding mouth and from the position of the central part off-centre of this feeding mouth.

Under this occasion, teat can be made of or by constituting to the inclined-plane that central part one side of feeding mouth has a down dip from the outside the flange of making the shape that hangs down.

In the 1st kind of control valve unit, by making valve seat with respect to the horizontal plane become heeling condition, the liquid film that forms between the upper surface of the lower surface of valve and valve seat when valve is opened becomes asymmetric shape at the downside of valve seat with upside, and under this occasion, the degree of depth at the downside of valve seat and upside place, liquid is also different, the valve seat downside act on big than upside of fluid pressure on the liquid film, but that the section modulus of liquid film then is liquid film one side that forms at the valve seat downside than in upside formation is little.Therefore, the liquid film that forms at the valve seat downside compares breaking easily that upside forms, is broken as the balance of liquid film integral body, just breaks at the position of weakness easily.

When valve is opened, at the liquid film of valve and valve base chamber formation, form the circle of least radius at valve and valve base chamber.Therefore in the valve of the 2nd kind of control valve unit, teat one side is arranged and do not have on the side of teat, the gap length of valve and valve base chamber changes.That is, because littler than the gap of the outer surface of valve and valve base chamber, thereby be that outer surface and valve base chamber at teat forms liquid film, in that teat one side is arranged in the gap of the outer surface of the teat that teat one side is arranged and valve base chamber along with valve is opened.Like this, be to form at the side, the liquid film that do not have teat, and be to form that the balance of liquid film integral body is broken, and therefore just breaks from weak part easily at the outer surface of teat and valve base chamber in that teat one side, liquid film are arranged at the outer surface of valve and valve base chamber.

At this moment, under the occasion that the teat of valve is made of the flange of making the shape that hangs down, be easy to form the liquid film that disequilibrates.And under the occasion that constitutes on the inclined-plane that teat is had a down dip by central part one side that has from the outside to the feeding mouth, form along the inclined-plane reliably at the film that has teat one side to form, can stably form the liquid film that balance is broken.

Fig. 1 is the profile diagram of expression the 1st embodiment's of the present invention major component,

Fig. 2 is the schematic representation of the effect of expression when valve opened,

Fig. 3 is the vertical disconnected side view of the automatic ice-making plant part of expression refrigerator,

Fig. 4 is the profile diagram of the major component of expression admission port under in off position,

Fig. 5 is the figure suitable with Fig. 4 that is illustrated under the closed condition of admission port,

Fig. 6 is the experimental result chart that the feedwater with among each embodiment of the present invention before being illustrated in is tested,

Fig. 7 is expression the present invention 2nd embodiment's suitable with Fig. 1 a major component profile diagram,

Fig. 8 is the oblique drawing that expression is seen from the below of valve,

Fig. 9 is the figure suitable with Fig. 2,

Figure 10 is the profile diagram of the expression the present invention 3rd embodiment major component suitable with Fig. 1,

Figure 11 is the figure suitable with Fig. 8,

Figure 12 is the figure suitable with Fig. 2,

Figure 13 is the figure suitable with Fig. 1 of the valve arrangement before the expression,

Figure 14 is the figure suitable with Fig. 2.

Below, the 1st embodiment of control valve unit of feed trough who the present invention is used for being installed in the automatic ice-making plant of refrigerator is described with reference to Fig. 1-Fig. 6.Fig. 3 represents to be installed in the automatic ice-making plant structure roughly on every side on the refrigerator body 11.In Fig. 3, in the ice making compartment 12 of 11 li formation of refrigerator body, setting ice making machine 15, the driving mechanism 14 that it has ice making disk 13, can free rotation ground supportings this ice making disk 13 etc.Above-mentioned ice making machine 15 is made into like this, promptly, make the water that leaves 13 li of ice making disk in be supplied to the cold air cooling in the ice making compartment 12 and form ice, according to the finishing ice-making temperature that records with the temperature transducer that is arranged on 13 li of ice making disk (not having expression among the figure), ice is come off by making ice making disk 13 counter-rotatings by driving mechanism 14 and turning round to twist; The ice of Xing Chenging is stored in 16 li in storage ice container like this.

Above ice making compartment 12, by partitioning wall 17 formation cold storage rooms 18, in this cold storage room 18 mounting table 19 is being set.On this mounting table 19, container filled with water 20 is being set with being integral.Be provided with outflow opening 21 in the bottom of container filled with water 20.The water that is installed in 20 li of containers filled with water is supplied with above-mentioned ice making disk 13 from this outflow opening 21.

As shown in Figure 4 and Figure 5, in the inside of above-mentioned container filled with water 20, can adorn quantitatively resevoir 22 with unloading.This quantitative resevoir 22 is made into can store a certain amount of water of for example storing 105cc, and the only confluent that provides to ice making disk 13 is provided this water storage capacity.Bottom center position at quantitative resevoir 22 forms the mouth of a river 23, and this water outlet 23 is made by outlet valve mechanism 24 and carried out switch.

Above-mentioned outlet valve mechanism 24 is made of valve rod 26 and valve body 27, and valve rod 26 is inserted and led in water outlet 23, and can be bearing in up or down on the supporting arm 25 on the inner bottom surface that uprightly is arranged at quantitative resevoir 22; Valve body 27 can be bearing on the valve rod 26 up or down, from the outer switch water outlet 23 of quantitative resevoir 22.Above-mentioned valve rod 26 is made into by barrier film 30 and the upper valve rod 28 that is arranged on quantitative resevoir 22 1 sides and the lower valve rod 29 that is arranged on valve body 27 1 sides and joins.Between the lower end of upper valve rod 28 flange flange 28a and supporting arm 25, be provided with compression helical spring 31, by the effect of this compression helical spring 31, make upper valve rod 28 rely on the below.And pressure spring 32 is being set between the lower end flange 29a of valve body 27 and lower valve rod 29, by the effect of this pressure spring 32, make valve body 27 rely on the top with respect to lower valve rod 29.The packing ring of for example being made by the soft rubber of annular 33 as sealing material is installed in the peristome portion of water outlet 23.

A side is setting valve drive 34 below container filled with water 20.This valve drive 34 has the service axis 36 on the box 35 that can be arranged on above-mentioned lower valve rod 29 belows up or down and is arranged on the figure in the box 35 and do not have the motor of expression and the cam mechanism that moves up and down that the rotation motion of this motor is transformed into service axis 36.Service axis 36 is inserted the hole 37 that forms on logical container filled with water 20 bottoms and is given prominence to upward.This hole 37 is joined with lower valve rod 29 by this pad 38 by pad 38 sealings, the service axis 36 that prevent water outflow usefulness.So, along with service axis 36 moves up and down, lower valve rod 29 and upper valve rod 28 also move up and down, simultaneously valve body 27 also moves up and down.

On the other hand, on above-mentioned mounting table 19, can install with unloading deposit liquid, be the groove 39 of depositing water under this occasion.Be provided with highlightedly downwards in the bottom of this groove 39 and be tube cylindraceous portion 40, in this one 40, as shown in Figure 1, can twist nut cap 41 with unloading.On the position of the substantial middle of this cap 41, with respect to the horizontal plane become heeling condition, valve seat 43 is being set, valve seat 43 is formed with the admission port 42 as circular feeding mouth, and switch is carried out by valve body 44 in this admission port 42.

Valve body 44 is made of valve shaft 47 and valve 48; Valve rod 47 can be inserted the logical slotting axial region 46 that is arranged on the bearing support 45 on the cap 41 up or down; Valve 48 is installed in the underpart of this valve shaft 47 and makes and come the circular bowl-shape of switch admission port 42 from the top.Above-mentioned valve body 44 is pushed to closing direction because of being arranged on the effect as the compression helical spring 49 of resilient member of inserting between axial region 46 and the valve 48, promptly is pushed to the below.Under valve 48 closing state, the lower surface of valve 48, from the peripheral portion of top contact admission port 42, thus admission port 42 is closed.And, the valve shaft 47 of valve body 44 is set to the valve rod 26 of above-mentioned outlet valve mechanism 24 on same axis.

The 41a of tube portion is arranged on the lower surface of cap 41 down highlightedly.The 41a of this outer internal diameter size of opening portion above being sized to than quantitative resevoir 22 is smaller slightly, the 41a of tube portion and the inner peripheral surface of quantitative resevoir 22 between form under the state in gap and be inserted in the quantitative resevoir 22.

Adorning water purifier 50 in the groove 39.This water purifier 50 is made of housing 52 and water-purifying filter 53, and housing 52 forms inlet 51 round above-mentioned bearing support 45 configurations and in surrounding wall portion; Water-purifying filter 53 is made and is configured in cylindric in this housing 52.The air suction section 54 of tubular erectly is being set on the top of housing 52.Water-purifying filter 53 is for example fibrous active carbon is made the nonwovens shape and to constitute, and this water-purifying filter 53 has the function that the water that passes through is purified.

Below, the effect of said structure is described.Under the state of Fig. 4, the admission port 42 of groove 39 1 sides is closed by valve 48.And the service axis 36 of valve activator 34 is on the lower position, and outlet valve mechanism 24 the upper valve rod 28 here breaks away from groove 39 valve shaft 47 on one side, and meanwhile water outlet 23 is in the state that is opened.

When beginning to make service axis 36 to be moved upward from this state, by this service axis 36 valve rod 26 is pushed to, valve body 27 also is brought to simultaneously, contacts with packing ring 33 by valve body 27, and water outlet 23 is closed.When valve rod 26 was further pushed to, the upper end of upper valve rod 28 joined from below and groove 39 valve shaft 47 on one side, thereby this valve shaft 47 is pushed to.When this valve shaft 47 was pushed to, valve 48 just broke away from upward from valve seat 43.

Even break away from valve 48 and valve seat 43, under the still less state of the shift motion of valve 48, shown in Fig. 2 (b) and Fig. 2 (c), between the lower surface of valve 48 and valve seat 43 upper surfaces, form the film A that the surface tension by water causes, during this film A forms, water from the admission port in 42 grooves that flow out 39 are subjected to the resistance shelves of film A, and break just 42 outflows from the admission port of the water in the groove 39 along with this film A.

Under this occasion, because valve seat 43 is inclined relative to horizontal, thereby when valve 48 is opened, just become asymmetrical shape at the downside of valve seat 43 (right side among Fig. 2 (b) and Fig. 2 (c)) with upside at the film A that forms between valve 48 and the valve seat 43.And, under this occasion because the downside of valve seat 43 is lower than upside, thereby also just deep, big with regard to the pressure of the water on acting on film A, at the ratio upside of valve seat 43 downsides; And with regard to the section modulus of film A, the section modulus of the film A that forms at valve seat 43 downsides is littler than the section modulus of the film A that forms at upside.Therefore, break easily than the film A that forms at upside, the balance of film A integral body is broken, is broken from the more weak downside of intensity easily at the formed film A of valve seat 43 downsides.Along with service axis 36 is moved to upper limit position, valve 48 also is moved to upper limit position.

A breaks when film, and the water in the groove 39 is just by the gap between valve 48 and the valve seat 43,42 flow out and be stored in 22 li of quantitative resevoirs from the admission port.So quantitatively the water levels in the resevoir 22 rise, as shown in Figure 5, when the lower ending opening portion of the 41a of tube portion on the cap 41 being stopped up, just stop water 42 outflows from the admission port by this water surface.At this moment, just stored a certain amount of water for 22 li at quantitative resevoir.

As mentioned above, after 22 li of quantitative resevoirs had been stored a certain amount of water, service axis 36 was lowered by the lower position from upper limit position.Along with service axis 36 descends from upper limit position, the valve 48 of groove 39 sides at first contacts with the peripheral portion of admission port 42, thereby admission port 42 is closed.But water outlet 23 still remains on by valve body 27 closing state.Then, when service axis 36 drops to the lower position, upper valve rod 28 and valve shaft 47 are broken away from, valve body 27 is broken away from downwards from the bottom of quantitative resevoir 22, thereby water outlet 23 is opened.Like this, make the water that is stored in the quantitative resevoir 22 flow to 20 li of containers filled with water, then, water is supplied with the ice making disk 13 that is arranged on the below and is stored in the there from outflow opening 21 by the drop effect from water outlet 23.

Be stored in the cold air cooling that the water in the ice making disk 13 are supplied in the ice making compartment 12 and form ice.Then, when in by the figure that is arranged on the ice making disk 13, not having the temperature transducer of expression not measure finishing ice-making during temperature, make ice making disk 13 counter-rotatings, and the ice in the ice making disk 13 are dropped in the storage ice container 16, and stored by turning round lemon.Then, make ice making disk 13 revert to original level, carry out above-mentioned feedwater action again.

In the 1st above-mentioned embodiment, because the valve seat 43 of groove 39 is inclined relative to horizontal, thereby when valve 48 was opened, the film A of 43 formation of valve 48 and valve seat was into asymmetrical shape at the downside of valve seat 43 with upside; And because the downside of valve seat 43 is lower so downside is darker than upside, with regard to the water pressure on acting on film A, the ratio upside of the downside of valve seat 43 big, and with regard to the section modulus of film A, the section modulus of the film A that forms at valve seat 43 downsides is littler than the section modulus of the film A that forms at upside.Therefore, the film A that forms at valve seat 43 downsides is than easier the breaking of film A that forms at upside, the balance of whole film A is broken, and just breaks from the more weak downside of intensity easily.Like this, the shift motion of valve 48 is increased, water also can 42 outflows from the admission port easily.

Fig. 6 represents with the present invention the 1st embodiment's control valve unit with the control valve unit of the pre-structure result of experiment that feeds water.Fig. 6 has listed when valve is opened, the result that the valve shift motion when film A is broken is measured.As can be seen from Figure 6, even the present invention's the 1st embodiment's mean value still can feed water than former short 1.66mm.Therefore the shift motion of valve 48 can dwindle, thereby can make the control valve unit miniaturization.

Fig. 7-Fig. 9 represents the present invention the 2nd embodiment, and this 2nd embodiment and above-mentioned the 1st embodiment are inequality aspect following.That is, the valve seat 56 that forms admission port 55 is made level.And below the valve 57 that makes admission port 55 switches, the inboard of the admission port 55 under these valve 57 closed conditions and with respect to admission port 55 central parts for eccentric periphery position on, be provided with as the sagging flange 58 of making of teat.Here, flange 58 is that the center made from valve 57 is the circular-arc of the center of circle, and forms the angular range of about 120 degree (on Fig. 8, represented by angle Q).

In said structure, when valve 57 from the state of closing admission port 55 direction moves up towards opening, when valve 57 breaks away from valve seat 56 upward, earlier as Fig. 9 (b) shown in, formation is caused by the surface tension of water between the upper surface of the lower surface of valve 57 and valve seat 56 film A.This film A is at round-formed with least radius of 56 of valve 57 and valve seats.

When valve 57 was further pushed to, shown in Fig. 9 (c), on valve 57, a side of flange 58 is arranged and do not have a side of flange 58, the gap length between valve 57 and the valve seat 56 changed.That is,, because a side of flange 58, littler than the outside and the gap between the valve seat 56 of valve 57 in the outside and the gap between the valve seat 56 of flange 58 is being arranged, thereby between the outside of the flange 58 that flange 58 1 sides are arranged and valve seat 56, just form film A along with valve 57 rises.Like this, film A also forms in flange 58 outsides that flange 58 1 sides are arranged and 56 of valve seats not only in valve 57 outsides that do not have flange 58 1 sides and 56 formation of valve seat, is broken as the balance of film A integral body, also just breaks from weakness easily.

The result of gained when above-mentioned Fig. 6 has represented also that the control valve unit with this 2nd embodiment feeds water experiment.As shown in Figure 6, with the present invention the 2nd embodiment, even mean value still can feed water than shortening about 0.43mm in the past.

Figure 10-Figure 12 represents the 3rd embodiment of the present invention, and this embodiment 3 has following difference with above-mentioned the 2nd embodiment.That is, in the bottom of valve 59, in the inboard of the admission port 55 under these valve 59 closed conditions and teat 60 is being set on for eccentric peripheral part with respect to these admission port 55 central parts.Under this occasion, the outside 60a of teat 60 is made into and has towards the admission port 55 central part the inclined-plane of inclination that descends.This teat 60 also similarly forms the angular range of about 120 degree with flange 58.And in valve 59, the lower surface 59a part beyond the teat 60 then is smooth shape.

In said structure, when valve 59 from the state of closing admission port 55 direction moves up towards opening, when valve 59 breaks away from valve seat 56 upward, earlier as Figure 12 (b) shown in, the film A that formation is caused by the surface tension of water between the upper surface of the lower surface of valve 57 and valve seat 56.Here, the side that teat 60 is arranged on valve 59 and do not have a side of teat 60, the shape of film A to change.Promptly, along with the rising of valve 59, a side of teat 60 (right side in Figure 12) is being arranged, between the outer surface 60a of teat 60 and valve seat 56, form film A, but along with valve 59 rises, this film A along the outer surface 60a of teat 60 relatively towards the following sidesway of teat 60.Therewith relatively, do not having a side of teat 60, the film A that forms between the outer surface of valve 59 and valve seat 56 increases along with the increase in gap.

Like this, teat 60 sides being arranged and not having the shape of teat 60 sides, film A just to have on valve 59 than big-difference, the balance of film A integral body is broken, easily from breaking than weakness.

Also represented control valve unit with above-mentioned the 3rd embodiment result of experiment that feeds water among above-mentioned Fig. 6.By this Fig. 6 as seen, the present invention the 3rd embodiment was even mean value still can feed water than lacking 0.07mm in the past.Under this occasion, though the mean value of the shift motion when film A breaks and do not have much difference in the past, standard deviation than in the past and other embodiments little.So-called standard deviation be meant for a short time can not have in shift motion when film A breaks inhomogeneous and not steady.This is considered to owing to make along the inclined-plane of the teat 60 outer surface 60a of film A and do not have the difference of teat 60 to have an effect really, form asymmetrical film A reliably.

The present invention has more than and is confined to the various embodiments described above, can do following distortion or expansion.

For example in the various embodiments described above, be that service axis 36 by valve drive 34 moves up and down, by valve rod 26

valve

48,57,59 is moved up and down, thereby but also can make when being arranged on groove on the mounting table, relatively push the structure that valve is pushed in the valve shaft lower end of groove side by the pushing portion that is fixedly installed on mounting table one side.

In addition, the present invention also is not limited to the control valve unit of the feedwater usefulness groove 39 in the automatic ice-making plant, also be applicable to the control valve unit of supplying with the groove that the water of being sprayed uses in the spray humidifier for example, perhaps in oil formula fan type heater, supply with the control valve unit of the groove that burned lam-oil uses.

Make valve seat with respect to the horizontal plane become the control valve unit of inclination at the feeding interruption-forming, because along with valve is opened, become asymmetric at the valve seat downside with upside with the liquid film that valve base chamber forms at valve, broken balance, weak part from the bigger downside of hydraulic action breaks easily, thereby need not increase the shift motion of valve, liquid is easily flowed out from the feeding mouth.

The bottom of valve, feeding mouth under the valve closed condition is inboard and position with respect to the central part off-centre of feeding mouth on be provided with in the control valve unit of teat, because along with valve is opened, the teat side is being arranged and do not having the teat side to become asymmetric with the liquid film that valve base chamber forms at valve, thereby balance is broken, break from vulnerable area easily, thereby need not increase the valve shift motion, liquid just can easily flow out from the feeding mouth.

At this moment, under the occasion that the teat of valve is made of the flange of making the shape that hangs down, form the film that balance is broken easily.And have by the outside under the occasion that constitutes to the inclined-plane that feeding mouth central part one side has a down dip at teat, form along the inclined-plane reliably at the film that has the teat side to form, thereby can stably form the film that disequilibrates.

Claims

1. control valve unit, have bottom that is configured in the groove of storing liquid and the valve seat that forms the feeding mouth, with can be provided with movably along the vertical direction with respect to this valve seat, by contacting with the peripheral portion of above-mentioned feeding mouth from the top and the feeding mouth being closed,, be it is characterized in that the valve that the feeding mouth is opened by the peripheral portion that upwards breaks away from the feeding mouth: above-mentioned valve seat is inclined relative to horizontal.

2. control valve unit, have bottom that is configured in the groove of storing liquid and the valve seat that forms the feeding mouth, with can be provided with movably along the vertical direction with respect to this valve seat, by contacting with the peripheral portion of above-mentioned feeding mouth from the top and, it is characterized in that with the valve that the feeding mouth is closed, by the peripheral portion that upwards breaks away from the feeding mouth feeding mouth opened: the inner side of above-mentioned feeding mouth and be provided with teat on for eccentric position with respect to the central part of this feeding mouth in the bottom of above-mentioned valve, when this valve is in closed condition.

3. control valve unit as claimed in claim 2 is characterized in that: teat is made of the flange of making the shape that hangs down.

4. control valve unit as claimed in claim 2 is characterized in that: teat has the inclined-plane that central part one side to the feeding mouth has a down dip by the outside and constitutes.