CN1077273C - Water supply device for automatic ice maker - Google Patents

Abstract

A valve element is separated from a water outlet and the water outlet is left in a state of being opening until the next water supply is executed after a prescribed quantity of water stored in a fixed-quantity water storage unit is supplied to an ice-making tray. Therefore water drops sticking to and remaining in the fixed-quantity water storage unit fall down from the water outlet and water drops sticking to the peripheral surface of the valve element and remaining thereon flow down also from the valve element along the slope of the peripheral surface. The present invention prevents sticking to a fixed-quantity water storage unit and a valve element for opening and closing an water outlet thereof and that slime hard to occur thereon.

Description

The waterworks of automatic ice-making plant

The present invention relates to supply with the waterworks of the automatic ice-making plant of quantitative water to ice maker container.

The conventional construction of these used class waterworks is shown in Figure 10 as described later in the freezer.This waterworks be by feed pump 3 be accumulated in plastics in the refrigerating chamber 1 be filled with water water in the bucket 2 in ice-making compartment 4 set ice maker container, be that ice-making disc 5 is supplied with, above the bucket 2 that is filled with water, detachable water storing tank 6 is being set.This water storing tank 6 to bucket 2 feedwater that are filled with water, makes water in this bucket 2 that is filled with water often remain on certain water level that the lower ending opening with feedwater oral area 8 stops up from the feedwater oral area 8 that is provided with water-supply valve 7.

The partition wall 10 that is had limbers 9 in the aforementioned bucket 2 that is filled with water is divided into and is filled with water chamber 11 and decides water yield chamber 12, inserts the feedwater oral area 8 of water storing tank 6 in the chamber 11 that is filled with water, and then inserts the suction oral area 3a of feed pump 3 in deciding water yield chamber 12.In case feed pump 3 startings, this feed pump 3 is promptly supplied with the water of deciding in the water yield chamber 12 to ice maker container 5.At this moment, the water level of deciding water yield chamber 12 reduces gradually, and be filled with water and produce water-head between the chamber 11, and limbers 9 bores that are communicated with two Room 11 and 12 are very little, in process with feed pump 3 feedwater, from the chamber 11 that is filled with water through the limbers 9 and to flow into the water electrode decide in the water yield chamber 12 few, so can be stored in a certain amount of water of deciding in the water yield chamber 12 to ice-making disc 5 supplies.

When adopting the waterworks of this structure, the prerequisite of quantitative water supply is, in process with feed pump 3 feedwater, from the chamber 11 that is filled with water through the limbers 9 and the water yield that inflow is decided in the water yield chamber 12 is controlled at minute quantity.Yet, the bore of limbers 9 might produce error because of bucket 2 the shaping error that is filled with water etc., when the bore of limbers 9 during greater than design load, in process with feed pump 3 feedwater, flow into the water yield of deciding water yield chamber 12 from the chamber 11 that is filled with water error can take place, the water yield difference that the result causes every batch of product to supply with to ice-making disc 5.

For this reason, consider recently with the quantitative cistern with outlet valve mechanism, be arranged on this quantitative cistern and have the water storing tank of water-supply valve mechanism, the valve operating system that outlet valve mechanism and water-supply valve mechanism are carried out switching manipulation constitutes waterworks, close outlet valve mechanism and open water-supply valve mechanism by valve operating system, therefrom a certain amount of water is supplied with to quantitative cistern from water storing tank, then, close water-supply valve mechanism and open outlet valve mechanism, by drop a certain amount of water that is stored in the quantitative cistern is supplied with to ice-making disc therefrom.

Yet, in above-mentioned drop height type waterworks, if from quantitative cistern after ice-making disc feedwater, keep its delivery port closing state, water droplet can accumulate in the delivery port part, can adhere to incrustation scale etc., or forms mucus.Again, after the moisture that accumulates in this delivery port part had been done, inorganic matter contained in the water can be separated out and be clipped between delivery port and the valve body, thereby destroyed sealing, caused and leaked.

The delivery port of this quantitative cistern and the sealing between the valve body are carried out with annular seal (also can be described as ring bodies).This annular seal is installed in delivery port one side.In this occasion, the installation of annular seal is to be undertaken by the fastening of nut for example, and annular seal can lose just round property easily because of this fastening compressive deformation, and when contacting with valve body, the gap can appear in the part, thereby causes leaking.If contact with valve body, because the conformability between itself and valve body is relatively poor, locally can produce the gap, thereby cause leaking at the harder thick wall part of annular seal again.

On the other hand, on the valve body of outlet valve mechanism, peristome is set, sealed obstruction of this peristome.For the stem movement of the outlet valve mechanism that is driven up and down by the lifting axial region of valve operating system being passed to the valve rod of water-supply valve mechanism, must adopt this structure.In this occasion, if its seal is when installing with nut etc. from the outside of valve body, then the water capacity easily accumulates in these 2 positions of recess of recess and the nut and the valve body intersection of seal and nut intersection, can make valve body adhere to more incrustation scale etc., is easy to generate mucus.

In order to dwindle the space that is provided with of the housing that holds valve operating system, consider this housing is arranged in the recess again.At this moment, the lifting axial region that impels the valve rod of water-supply valve mechanism and outlet valve mechanism to move up and down is to join with aforementioned valve rod by being located to the hole portion of bottom, water route.Though above-mentioned being located to the hole portion of water route bottom stopped up with seal, when water former thereby when this hole portion spills because of some, the water that spills just drop on housing above, and enter recess along housing.So, water just accumulates in recess, and might enter in the housing and inner electric devices such as motor are made moist.

In view of the foregoing, the object of the invention is to provide a kind of waterworks of automatic ice-making plant, can prevent that the remaining water droplet that is attached to quantitative cistern inner face from accumulating in the delivery port part, and can prevent to be contained between the ring bodies (annular seal) of delivery port and the valve body and produce the gap, and then can the sealing seal of peristome above the outlet valve mechanism of valve be installed, and there is not water to accumulate at the recess that the valve operating system housing is set to reduce mode that water droplet may adhere to part as far as possible.

The waterworks of automatic ice-making plant of the present invention possess the quantitative cistern that is positioned at the ice maker container top and has delivery port in the bottom, the aforementioned delivery port of this quantitative cistern is carried out the outlet valve mechanism of switch, be arranged on the aforementioned quantitative cistern and supply with the water storing tank of certain water gaging from the admission port of bottom to aforementioned quantitative cistern, the aforementioned admission port of this water storing tank is carried out the water-supply valve mechanism of switch, drive the valve operating system of outlet valve mechanism and water-supply valve mechanism, aforementioned delivery port close and open aforementioned admission port and from aforementioned water storing tank after aforementioned quantitative cistern is supplied with a certain amount of water, close aforementioned admission port and open aforementioned delivery port, a certain amount of water that lodges in aforementioned quantitative cistern is supplied with ice maker container through giving the water route, aforementioned outlet valve mechanism is by upper valve rod moving up and down and lower valve rod, valve body, and valve seat constitutes, be equipped with on the aforementioned upper valve rod its 1st afterburning downwards compression helical spring, this upper valve rod across one with aforementioned lower valve rod move up and down and the seal that changes shape put on aforementioned lower valve rod and with this lower valve rod respective action, aforementioned valve body forms the extension of expansion downwards and is installed on the aforementioned lower valve rod by the installing component that is fixed on the aforementioned lower valve rod, the 2nd compression helical spring that aforementioned valve body is afterburning upward is housed on this lower valve rod, aforementioned valve seat forms the section tab-like ring-type wing portion relative with the aforementioned extension of aforementioned valve body, when aforementioned valve body was risen, the aforementioned ring-type fin portion of the aforementioned extension of aforementioned valve body and aforementioned valve seat contacted and makes aforementioned delivery port liquid sealing.

Aforementioned delivery port possesses the ring bodies (annular seal) of the bottom, outside that is installed on aforementioned quantitative cistern, and aforementioned valve body closely is fixed in bottom, aforementioned outside, and this valve body is provided with annular projection in the outside of ring-type fin portion.

In addition, on aforementioned installation component, form through hole, through this through hole and with the internal communication of aforementioned seal.

Because waterworks of the present invention are when ice maker container feeds water, before this outlet valve mechanism was closed also the water-supply valve mechanism opening, so can supply with a certain amount of water to quantitative cistern from water storing tank, then, water-supply valve mechanism closed and the outlet valve mechanism opening, and a certain amount of water that accumulates in the quantitative cistern is supplied with to ice maker container.Be formed at extension on the 1st valve body when aforementioned the 1st valve body rises, contact with section tab-like ring-type fin portion on being formed at valve body, the deflection deformation of flexibility takes place in this ring-type fin portion, makes the delivery port liquid sealing.

The delivery port of being located at quantitative cistern bottom possesses the ring bodies that is installed on bottom, aforementioned quantitative cistern outside, though aforementioned valve body is anchored on bottom, aforementioned outside, the annular projection that is formed at the ring-type fin portion outside can prevent the excessive deformation of this valve body.

When with clamp structure between annular seal and delivery port when fastening, the annular projection of annular seal is extruded distortion.Therefore the distortion of annular seal rests on the annular projection part.

Because the seal of peristome is the inboard of being fixed in this valve body with installation component above the valve body of sealing outlet valve mechanism, only is the intersection of seal and valve body so accumulate the position of water droplet easily.

The water that enters the valve inner of outlet valve mechanism can be discharged from the osculum that is formed on the above-mentioned installation component.

It below is simple declaration to accompanying drawing.

Vertical profile side view when Fig. 1 is the major part normality of one embodiment of the invention.

Fig. 2 is Fig. 1 of water state is given in expression to quantitative cistern from water storing tank a corresponding diagram.

Fig. 3 is the corresponding diagram of expression to Fig. 1 of quantitative cistern feedwater finishing state.

Fig. 4 is the amplification longitudinal section of major part.

Fig. 5 is the exploded perspective view of quantitative cistern.

Fig. 6 is the local amplification view of annular seal.

Fig. 7 is the exploded perspective view of outlet valve mechanism of valve.

Fig. 8 represents valve operating system, (a) is the general structural map of representing in lifting shaft subordinate extreme position, (b) is the general structural map of representing at lifting axial region upper limit position.

Fig. 9 is the vertical profile side view of the ice maker of expression freezer.

Figure 10 is the corresponding diagram of Fig. 9 of the traditional waterworks example of expression.

The present invention is applied to an embodiment of the automatic ice-making plant of freezer below in conjunction with Fig. 1 to Fig. 9 explanation.

As shown in Figure 9, in the ice-making compartment 21 of freezer, be provided with ice-making disc 22, become ice after lodging in the cold air cooling that water in this ice-making disc 22 is supplied to ice-making compartment 21 as the plastics ice maker container.On the other hand, in the refrigerating chamber 23 above above-mentioned ice-making compartment 21, be provided with the mounting table 24 of plastics, circular water container 25 forms one with this mounting table 24.In addition, the front part of water container 25 forwards prolongs.The front of ice-making compartment 21 and refrigerating chamber 23 can be with door switch not shown in the figures.

Water container 25 is used to hold quantitative water and supplies with to ice-making disc 22, and the bottom at the position that prolongs to the front side as shown in Figure 1, forms flow export 26.Flow export 26 and run through ice-making compartment 21 and refrigerating chamber 23 between the pipeline 28 of partition wall 27 link, the water that is contained in the water container 25 injects ice-making disc 22 through piping 28.Thereby water container 25 and pipeline 28 are accepted a certain amount of water and are played a role as the water route 29 of giving from water to ice-making disc 22 that supply with.In addition in Fig. 9, the 30th, the flow of water relaxes member, and the strength and the anti-sealing that are used to weaken the water of supplying with from pipeline 28 splash from ice-making disc 22.

In addition as shown in Figure 4, form circular peristome 31 in the bottom of water container 25.The cylindrical shell 32 of double-deck tubular inserts this peristome 31 from the below, this cylindrical shell 32 is anchored on peristome 31 places by the nut 33 that combines with its top screw thread.The hollow inside of the inner cylinder portion 32a of above-mentioned cylindrical shell 32 becomes formation to be given the part in water route 29 and becomes the hole portion 34 that is present in water container 25 bottoms, makes this hole portion 34 liquid sealings by the containment member 36 that is anchored on across O type ring 35 between cylindrical shell 32 and the nut 33.

In the inside of above-mentioned water container 25, holding the circular quantitatively cistern 37 that plastics form.This quantitative cistern 37 is water container 25 and dismantling relatively, and in the time of in being contained in water container 25, the cyclic rib 37a of its upper periphery is formed at the support of the step surface 25a at water container 25 upper opening places.

Bottom center at above-mentioned quantitative cistern 37 forms the mouth of a river 38, and this delivery port 38 passes through outlet valve mechanism 39 and switch.Outlet valve mechanism 39 mainly is made of valve rod 40, valve body 41, and valve rod 40 is divided into upper valve rod 42 and the same lower valve rod 43 that is provided with the 43a of larger diameter flange portion in the bottom that the bottom is provided with the 42a of larger diameter flange portion again.The roughly truncated cone of the hollow that both sides were all opened wide about in addition, valve body 41 usefulness plastics (such as ABS resin) formed.

Can find out from Fig. 4 and Fig. 5, upper valve rod 42 passes the upright central bearing 37c of portion that is located at a plurality of rib 37b of quantitative cistern 37 inner bottom surfaces and also can move up and down, spacing with back-up ring 44, between the flange part 42a of this 37c of bearing portion and upper valve rod 42, be provided with 1st compression helical spring 45 afterburning downwards to upper valve rod 42.

In addition, can find out from Fig. 4 and Fig. 7, lower valve rod 43 passes circular mounting member 46, can move up and down, spacing with back-up ring 47, this circular mounting member 46 is provided with the 2nd valve body 41 is afterburning upward facing to lower valve rod 43 compression helical spring 48 by engaging the inboard that is installed on this valve body 41 with elastic card claw 41a integrally formed on valve body 41 as elasticity between the flange part 43a of this installation component 46 and lower valve rod 43.And, peristome 41b place is provided with the seal 49 that makes the elastomeric material system of peristome 41b liquid sealing above this on valve body 41, the lower end circumference of sealing part 49 inserts the inboard of valve body 41, and is anchored on below the circumference of top peristome 41b and between the installation component 46.Form osculum 46a on above-mentioned installation component 46, this osculum 46a makes the inside of seal 49 become the state that opens wide downwards.

The valve body 41 that combines like this, lower valve rod the 43, the 2nd compression helical spring 48 and seal 49 constitute different units respectively with the upper valve rod 42 and the 1st compression helical spring 45 that are installed on the quantitative cistern 37, and can separate with quantitative cistern 37.And, the following side unit of this outlet valve mechanism 39 by the bottom cylindrical portion 41c of valve body 41 and the protuberance of giving water route 29, be that the outside of aforementioned nut 33 is chimeric, become the state that can be supported in water container 25 1 sides up or down.

The following side unit of outlet valve mechanism 39 is being loaded on water container 25 1 rear flank, quantitatively cistern 37 promptly is contained in this water container 25, under this holds state, as Fig. 1 and shown in Figure 4, dock across seal 49 in the middle of upper valve rod 42 and the lower valve rod 43, the 1st compression helical spring 45 is through upper valve rod 42 and to lower valve rod 43 reinforcing downwards.In case and lower valve rod 43 is resisted the 2nd compression helical spring 48 and pushing upward, valve body 41 promptly rises, so this valve body 41 joins from below and the annular seal (ring bodies) 50 that is installed on delivery port 38 peripheries, this delivery port 38 is closed, otherwise, in case pushing is downwards then removed downwards from annular seal 50, thereby is opened delivery port 38 owing to the reinforcing of the 1st compression helical spring 45.

The installation constitution of annular seal 50 is described below in conjunction with Fig. 4 one Fig. 7, annular seal 50 can be made with silicon rubber for example, as shown in Figure 6, below annulus 50a, be provided with the annular projection 50b that forms one along protruding in one week, simultaneously below annulus 50a in Monday side protrude be provided with the formation one to the inside below the section that stretches out be the ring-type fin 50c of portion of tab-like.Annulus 50a is embedded in the endless groove 51 that the periphery of delivery port 38 forms below, and the slim liner 52 that for example forms with PETG is contacted with the following of annular projection 50b of this annulus 50a, under this state, ring-type clamp structure 53 is installed on the surrounding wall portion of delivery port 38, therefrom annulus 50a is clamped between the surrounding wall portion and clamp structure 53 of delivery port 38.In this occasion, in order to be installed on delivery port 38 surrounding wall portion by simple rotary manipulation, clamp structure 53 adopts with screws structures such as fastening or bayonet pin is fixing.

Then because valve body 41 moving upward, this valve body 41 contacts with annular seal 50, the contact portion of valve body 41 1 sides is coniform outer peripheral face 41d that diameter is expanded downwards, and the contact portion of annular seal 50 1 sides then is the ring-type fin 50c of portion, and both sides are doing the line contact full week.

On the other hand, as shown in Figure 1, above quantitative cistern 37, on mounting table 24, be provided with dismountable water storing tank 54.Stretch out downwards in the bottom surface sections of this water storing tank 54 and to be provided with a 54a of portion, the 54a of this goes up screw fixed and lid 55.The middle body of this lid 55 forms inclined plane 55a, and this inclined plane 55a goes up and forms admission port 56, short one section 55b of large-diameter annual portion that the following formation of lid 55 is simultaneously stretched out downwards.

Admission port 56 is by water-supply valve mechanism 57 switches.Valve rod 58 that this water-supply valve mechanism 57 can supported up or down by the central bearing 55d of portion that is installed in the carriage 55c on the lid 55 and the dome shape valve body 59 that is installed on valve rod 58 bottoms constitute.Valve rod 58 often keeps admission port 56 closing state because of being located at augmentor between valve body 59 and the 55d of bearing portion, being that compression helical spring 60 is afterburning downwards.In addition, water storing tank 54 is except sealing by admission port 56 with the outside links to each other, and is provided with water-purifying filter 61 in water storing tank 54.

For the ease of reaching into when cleaning water storing tank 54 inside, the bore of the 54a of tube portion of above-mentioned water storing tank 54 is quite big, and is for example also big than the bore of aforementioned quantitative cistern 37.Thereby, the diameter of lid 55 is also gone back greatly than the top of quantitative cistern 37, and be positioned at the upside wide diameter portion 25b of water container 25, and only stay minimum gap between the upper end of quantitative cistern 37 and relative, the state that stops up above that formation will this quantitative cistern 37.Again, the 55b of large-diameter annual portion of lid 55 is more smaller than the internal diameter size of quantitative cistern 37, and the inner peripheral surface of quantitative cistern 37 between leave under the state in minimum gap and insert in this quantitative cistern 37.And the valve rod 58 of water-supply valve mechanism 57 is positioned on the same axis with the valve rod 40 of outlet valve mechanism 39.

On the other hand, on aforementioned partition wall 27, form recess 62, in this recess 62, be provided with the valve operating system 63 that outlet valve mechanism 39 and water-supply valve mechanism 57 are carried out switching manipulation.This valve operating system 63 possesses the operating portion that can be supported in housing 64 up or down, be lifting axial region 65, and motor 66 shown in Figure 8, rotatablely moving of this motor 66 be converted to the conversion equipment that moves up and down such as the cam mechanism 67 of lifting axial region 65.This cam mechanism 67 is on the camshaft 69 that driven by motor 66 rotation cam disc 70 to be installed and to be constituted, as this above cam disc 70 cam surfaces formation concavo-convex.The lower end of lifting axial region 65 contacts with the top of this cam disc 70, and 1 time of cam disc 70 rotation makes the lifting axial region 65 reciprocal for 1 time.

As shown in Figure 4, above-mentioned lifting axial region 65 stretches out upward from the bearing cartridge 64a that stretches out setting integratedly with formation above the housing 64, stretches out the integrally formed umbrella 65a of portion in end at it.The 65a of this umbrella portion is positioned at the inner cylinder portion 32a (hole portion 34) of aforementioned cylindrical shell 32, across containment member 36 and join with the lower valve rod 43 of aforementioned outlet valve mechanism 39.Again, on housing 64, protrude integratedly and be provided with the tripartite dike wall 64b that the bottom of the inner cylinder portion 32a of cylindrical shell 32 is surrounded from the outside, by the position of this dike wall 64b encirclement as draining road 71.And an end on this draining road 71 to the outside of housing 64 stretch out and extend to recess 62 the outside, be the bottom surface 23a of refrigerating chamber 23 till.At the bottom surface of refrigerating chamber 23 23a, protrude the water retaining wall 23b that is provided with recess 62 encirclements, enter in the recess 62 from bottom surface 23a one side to prevent water.

In addition, in Fig. 9, the 72nd, sense switch puts in the situation of mounting table 24 water storing tank 54 through control lever 73 and to detect, the 74th, the storage refrigerator that the ice that ice-making disc 22 upset back is fallen from this ice-making disc 22 is stored, the 75th, detect the control lever of storage ice amount in the storage refrigerator 74.In addition, in Fig. 1, the 76th, the heater that water container 25 bottoms are heated, the 77th, the heater that flow export 26 parts are heated.

Again, aforesaid lifting axial region 65 often is parked in its lowermost position of the scope of moving up and down as shown in Figure 1.At this moment, two valve rods 42,43 up and down of outlet valve mechanism 39 are also owing to the elastic force of the 1st compression helical spring 45 is pressed down in the lower position.Under such state, thereby the valve body of outlet valve mechanism 39 41 breaks away from annular seals 50 delivery port 38 is opened, and the valve body 59 of water-supply valve mechanism 57 presses down owing to the elastic force of compression helical spring 60, admission port 56 is closed.Because the upper valve rod 42 and the lower valve rod 43 of outlet valve mechanism 39 are to make same knee-action, thus following except that the occasion that need specify, all illustrate as valve rod 40.

To the feedwater of ice-making disc 22 is to carry out for 1 time by cam disc shown in Figure 8 70 (camshaft 69) rotation, these cam disc 70 rotations 1 time, and lifting axial region 65 promptly comes and goes 1 time, outlet valve mechanism 39 and water-supply valve mechanism 57 switch in addition.In this occasion, as mentioned above, because lifting axial region 65 often stops at the lower position, so lifting axial region 65 is along with the rotation of cam disc 70, at first rise to the upper limit position shown in Fig. 8 (b) from the lower position shown in Fig. 8 (a),, drop to the lower position and be parked in this position from upper limit position again after a period of time at the state continuance that rises to this upper limit position.In order to detect 1 rotation of cam disc 70, magnet 78 is housed on the cam disc 70, simultaneously Hall integrated circuit 79 is set in housing 64 1 sides, the magnetic detection action that control device not shown in the figures is done according to Hall integrated circuit 79 and 1 rotation of cam disc 70 is detected, and motor 66 is cut off the power supply.

When below explanation cam disc 67 rotates 1 time, the relation of the knee-action of lifting axial region 65 and outlet valve mechanism 39 and water-supply valve mechanism 57 switches.

At first, when lifting axial region 65 was positioned at the lower position, as shown in Figure 1, the valve body 41 of outlet valve mechanism 39 was opened the delivery port 38 of quantitative cistern 37, and the valve body 56 of water-supply valve mechanism 57 is closed admission port 56.In case lifting axial region 65 begins to rise to upper limit position from the lower position,, the valve rod 40 of outlet valve mechanism 39 rises while just compressing the 1st compression helical spring 45.At this moment valve rod 40 upwards pushes away the valve body 41 of outlet valve mechanism 39 on one side on one side through the 2nd compression helical spring 48 and rises, in the rising way of valve rod 40, the coniform outer peripheral face 41d of valve body 41 contacts with the ring-type fin 50c of portion of annular seal 50, thereby delivery port 38 is closed.

Then, owing to valve body 41 stops at coniform outer peripheral face 41d and annular seal 50 position contacting, so valve rod 40 is in the valve body 41 of halted state relatively and slides upward.Therefore, along with the rising of valve rod 40, the 2nd compression helical spring 48 is compressed gradually, and the extruding force of 41 pairs of annular seals 50 of valve body is strengthened gradually, and delivery port 38 is formed more reliable sealing.In addition, in case the valve rod 40 of outlet valve mechanism 39 by on be pushed into the position of specified altitude, as shown in Figure 2, valve rod 40 contacts and resists the elastic force of compression helical spring 58 with the valve rod 58 of water-supply valve mechanism 57 and it is upwards pushed away, and valve body 59 is opened admission port 56.

In case transfer down maneuver to after lifting axial region 65 arrives upper limit position, the elastic force that the valve rod 40 and 58 of outlet valve mechanism 39 and water-supply valve mechanism 57 is compressed helical spring 45,48 and 60 pushes away downwards, at first as shown in Figure 3, the valve body 59 of water-supply valve mechanism 57 is closed admission port 56.At this moment, although valve rod 40 descends, valve body 41 reinforcing upward of outlet valve mechanism 39 owing to the 2nd compression helical spring 48, and push down annular seal 50, so delivery port 38 is kept closed condition.

Then because the decline of lifting axial region 65, the valve rod 58 that the valve rod 40 of outlet valve mechanism 39 breaks away from water-supply valve mechanism 57, in case this valve rod 40 further descends, because the back-up ring 47 of lower valve rod 42 contacts with installation component 36, the elastic force of the 2nd compression helical spring 48 is just accepted by back-up ring 47.So valve rod 40 moves downwards with valve body 41 one owing to the reinforcing of the 1st compression helical spring 45, so valve body 41 moves downwards owing to the reinforcing of the 1st compression helical spring 45, and break away from the ring-type fin 50c of portion of annular seal 50, begin to open delivery port 38.In addition, in case lifting axial region 65 drops to the lower position, valve body 41 promptly further descends, and as shown in Figure 1, delivery port 38 becomes full-gear.Lifting axial region 65 stops to move under this state.

The below effect of the Automatic Water System of the above-mentioned structure of explanation.

Finishing ice-making in ice-making disc 22, this ice-making disc 22 spins upside down, and after subglacial being dropped down onto store in the storage refrigerator 74, in case restore to the original state, then should make motor 66 energisings to ice-making disc 22 feedwater.So at first be that lifting axial region 65 rises to upper limit position from the lower position, as shown in Figure 2, under delivery port 38 closing state of valve body 41 with quantitative cistern 37 of outlet valve mechanism 39, the valve body 59 of water-supply valve mechanism 57 is opened the admission port 56 of water storing tank 54.Water in the water storing tank 54 is flow in the quantitative cistern 37 by admission port 56, and be stored in this quantitative cistern 37.

At this moment, because admission port 56 forms inclined plane 55a, the height and position difference of its open circumferential edge portion, the moisture film that produces because of surface tension between the peripheral edge portion of valve body 59 and admission port 56 in early days (when the ascending amount of valve body 59 is very little) destroyed, water promptly flows out from water storing tank 54 in early days.Thereby can shorten the upward stroke of valve body 59, and then shorten the upward stroke of lifting axial region 65.

Along with water 56 flows out from the admission port, quantitatively the water levels in the cistern 37 rise, and as shown in Figure 2, in case its water surface is blocked the lower ending opening as the 55b of large-diameter annual portion of 56 bottoms, admission port, water promptly stops from the admission port 56 and flows out.At this moment, because the 55b of large-diameter annual portion often is supported on the certain height position,, in other words, often store a certain amount of water so quantitative cistern 37 often keeps certain water level.

As mentioned above, in case quantitatively stored a certain amount of water in the cistern 37, lifting axial region 65 just drops to the lower position from the upper limit then, decline along with this lifting axial region 65, the valve body 59 that at first is water-supply valve mechanism 57 is closed (see figure 3) to the admission port 56 of water storing tank 54, then, the valve body 41 of outlet valve mechanism 39 breaks away from the annular seal 50 of quantitative cistern 37, and delivery port 38 is opened.So, the water that is stored in the quantitative cistern 37 promptly flows into water container 25 from delivery port 38, and supplies with in ice-making disc 22 through piping 28 from flow export 26 owing to drop.When lifting axial region 65 drops to the lower position, then stop the state (see figure 1) that delivery port 38 is opened in valve body 41 maintenances of outlet valve mechanism 39 at this place.

As mentioned above, present embodiment only be comprise water in the 55b of large-diameter annual portion, be stored in a certain amount of water the supply system ice pan 22 in the quantitative cistern 37.At this moment, with handle shown in Figure 10 be communicated with the chamber 11 that is filled with water through limbers 9 to decide the conventional construction that the water in the water yield chamber 12 supplies with to ice-making disc 5 with feed pump 3 different, because water can not flow in the quantitative cistern 37 from elsewhere to ice-making disc 22 feedwater the time, so can often supply with a certain amount of water, can realize accurate quantitative water supply to ice-making disc 22.

Again, because outlet valve mechanism 39 is in the state that delivery port 38 is opened usually, so incrustation scale etc. can not adhered in the surface of the inner face of quantitative cistern 37 or valve body 41.Promptly, if valve body 41 is keeping delivery port 38 closing state to ice-making disc 22 feedwater backs, the remaining water droplet that then is attached to quantitative cistern 37 inner faces can flow to quantitative cistern 37 bottommosts annular seal 50 around and accumulate, incrustation scale can be adhered in surface at the coniform outer peripheral face 41d of the ring-type fin 50c of portion of annular seal 50 or valve body 41, or causes mucus to produce.

Yet, in the present embodiment, the valve body 41 of outlet valve mechanism 39 is at the state from finishing to ice-making disc 22 feedwater to keep before feedwater next time delivery port 38 is opened, so being attached to the remaining water droplet of quantitative cistern 37 inner faces can drip from delivery port 38, and can not accumulate in this delivery port 38 parts, and can be, or produce mucus at the quantitatively inner face of cistern 37 or the surface attachment incrustation scale of valve body 41.

And, because delivery port 38 opens, make the cold air to refrigerating chamber 23 in, supplied with mobile in quantitative cistern 37, the water droplet that is in the cold air just can evaporate, and can prevent more effectively that incrustation scale from adhering to or produce mucus.And even separate out because of water-drop evaporation makes inorganic matter, it separates out the position also seldom is the ring-type fin 50c of portion at annular seal 50, and is the position beyond the ring-type fin 50c of portion mostly, so can not diminish sealing effectiveness.

Because the outer peripheral face 41d of valve body 41 forms coniform, the water droplet that is attached to valve body 41 surfaces also can flow down from valve body 41 naturally along the slope of its coniform outer peripheral face 41d, so can prevent that water droplet is attached on the valve body 41, adhere to incrustation scale and inorganic matter or mucus etc. take place especially effective at the outer peripheral face 41d that joins with the ring-type fin 50c of portion to preventing.In addition, water droplet is flowed down from the coniform outer peripheral face 41d of valve body 41, the tiltangle (see figure 4) of coniform outer peripheral face 41d is preferably in more than 60 °.

On the other hand, when delivery port 38 was closed, annular seal 50 was by making its ring-type fin 50c of portion contact with valve body 41 and seal between delivery port 38 and valve body 41, so sealing improves.In other words, if annular seal 50 is not established the ring-type fin 50c of portion, guarantee sealing but contact with annulus 50a by valve body 41, then because annulus 50a wall thickness, morphotropism lacks flexibility, and diminish for the conformability of valve body 41, like this will be between annular seal 50 and valve body 41 locally produce minimum gap, cause leaking.By contrast, because the ring-type fin 50c of portion is a tab-like, and wall is thinner, and the high resilience morphotropism so can cooperate with the coniform outer peripheral face 41d of valve body 41 well, can not produce the gap, can not leak.

And, before feedwater beginning next time, keeping that the conventional construction of delivery port 38 closed conditions is different to ice-making disc 22 feedwater backs with valve body 41, annular seal 50 can not be subjected to the extruding force of valve body 41 for a long time, and the ring-type fin 50c of portion of annular seal 50 can not follow the string.Therefore, the ring-type fin 50c of portion can keep contacting as better elastic with the coniform outer peripheral face 41d of valve body 41 for a long time, thereby keeps sealing.

Again, annular seal 50 is the surrounding wall portion that are installed on delivery port 38 with clamp structure 53, if at this moment can not excellent sealing between annular seal 50 and the clamp structure 53, then water can spill from the gap between the two.In the present embodiment, in order to carry out this sealing, protrusion is provided with annular projection 50b below the annulus 50a of annular seal 50, owing to be that fastening force by clamp structure 53 is with this annular projection 50b crimp, make this annular projection 50b and clamp structure 53 fluid-tight engagement, so can not apply excessive fastening force to annulus 50a, can be annulus 50a crimp.If do not establish annular projection 50b, but by clamp structure 53 and the direct crimping of annulus 50a being guaranteed the sealing of the two, then annulus 50a can be subjected to excessive compression, the result makes annulus 50a distortion, the positive circle of the ring-type fin 50c of portion is destroyed, make the sealing of 41 of ring-type fin 50c of portion and valve bodies destroyed, present embodiment then can prevent this from occurring.

In addition, present embodiment clips liner 52 between the annular projection 50b of annular seal 50 and clamp structure 53, so undertaken by the rotation of clamp structure 53 when fastening, annular seal 50 can not be twisted and produce fold, can keep the positive circle of annulus 50a and then the maintenance ring-type fin 50c of portion.In other words, if do not establish liner 52, because annular seal 50 uses polyurethane rubber system, coefficient of friction is big, and when rotation clamp structure 53 carries out when fastening, annulus 50a can be twisted and produce fold, will lose that it is being just circular.Yet, in the present embodiment, liner 52 usefulness PETGs are made, very hard, and coefficient of friction is little, thus more sliding between clamp structure 53 and the liner 52, annulus 50a just can not take place and be twisted to the phenomenon that produces fold in the result, can make the ring-type fin 50c of portion keep good positive circle, and seamlessly join between the coniform outer peripheral face 41d of valve body 41, thereby can guarantee good sealing property.

Again, since be the inboard of valve body 41 with installation component 46 closed valve 41 above the seal 49 of peristome 41b fixed, so the position that water may be adhered to because of the installation of seal 49 on valve body 41 has only intersection one place of 49 of valve body 41 and seals.On the contrary, if it is fastening with nut etc. seal 49 in the outside of valve body 41, then the water droplet position of accumulating can increase, the water yield of adhering to is increased, thereby cause the adhesion amount of incrustation scale to increase or be easy to generate mucus, and in the present embodiment, because the water droplet attachment area reduces, even so there is incrustation scale to adhere to, it is measured also seldom, and be difficult for producing mucus.

And, on installation component 46, formed osculum 46a, just in case seal 49 breaks, water enters in the valve body 41 from this, these water also can discharge by osculum 46a.Therefore, can prevent that sealing accumulates in the valve body 41 and the cold air cooling to refrigerating chamber 23 in, supplied with when causing the fault etc. of heater 76,77 and icing phenomenon takes place.

In addition, in case conduct is broken to the containment member 36 of the hole portion 34 of the cylindrical shell 32 of the bottom peristome in water route 29, water promptly can enter and drop on the housing 64 of valve operating system 63 from this, and this part water is accepted by the draining road 71 of housing 64, is discharged to the inner bottom surface 23a of refrigerating chamber 23.Therefore, be provided with and do not have water in the recess 62 of housing 64 and accumulate, can prevent motor 66 electric members such as grade in the housing 64 because of being stained with the unfavorable condition that water makes insulating properties decline.

Have, the gap between the 65a of umbrella portion of lifting axial region 65 and hole portion 34 inner peripheral surfaces is set in below the regulation area again, so in case containment member 36 breaks, when water spills from hole portion 34, once do not have a large amount of water and spill, but have only a spot of water to spill at every turn.Therefore, the big water gaging that draining road 71 drainabilities can not take place to surpass spills and overflows and lodge in situation in the recess 62 from dike wall 64b from hole portion 34.

In sum, the present invention has following effect.

The waterworks of automatic ice-making plant of the present invention often keep a state that the delivery port of quantitative cistern is opened, the water droplet that remains in quantitative cistern inner face when ice maker container feeds water is discharged naturally from delivery port after this, so can prevent to greatest extent to adhere to incrustation scale or mucus takes place at the inner face of quantitative cistern or the valve body of switch delivery port, again, the ring-type fin portion of ring bodies (annular seal) forms the section tab-like, make ring-type fin portion that flexible deflection deformation take place easily, can imitate the valve body outside shape of outlet valve mechanism and free deflection, so when delivery port is closed, can between this delivery port and valve body, form excellent sealing.

By protruding annular projection is set at annular seal, in case with clamp structure with annular seal when fastening, annular projection promptly is out of shape and will seals between annular seal and the clamp structure, so the distortion of annular seal only is the annular projection part, and it is positive circular that thereby the distortion of whole annular seal is destroyed, can not destroy and valve body between sealing.

With the seal of peristome sealing above the valve body of outlet valve mechanism is the inboard that is fixed on this valve body with installation component, and the position that water droplet is accumulated easily only limits to the intersection of seal and valve body, so can reduce the degree that takes place with mucus of adhering to of incrustation scale.

Form osculum on the installation component of the seal of peristome sealing on the valve body of outlet valve mechanism, even cause water to enter valve inner for a certain reason, this part water also can be discharged from osculum.

Claims (4)

1. the waterworks of an automatic ice-making plant, possesses the quantitative cistern that is positioned at the ice maker container top and has delivery port in the bottom, the described delivery port of this quantitative cistern is carried out the outlet valve mechanism of switch, be arranged on the described quantitative cistern and supply with the water storing tank of certain water gaging from the admission port of bottom to described quantitative cistern, the described admission port of this water storing tank is carried out the water-supply valve mechanism of switch, drive the valve operating system of outlet valve mechanism and water-supply valve mechanism, described delivery port close and open described admission port and from described water storing tank after described quantitative cistern is supplied with a certain amount of water, close described admission port and open described delivery port, a certain amount of water that lodges in described quantitative cistern is supplied with ice maker container through giving the water route

It is characterized in that, described outlet valve mechanism is by upper valve rod moving up and down and lower valve rod, valve body, and valve seat constitutes, be equipped with on the described upper valve rod its 1st afterburning downwards compression helical spring, this upper valve rod across one with described lower valve rod move up and down and the seal that changes shape put on described lower valve rod and with this lower valve rod respective action, described valve body forms the extension of expansion downwards and is installed on the described lower valve rod by the installing component that is fixed on the described lower valve rod, the 2nd compression helical spring that described valve body is afterburning upward is housed on this lower valve rod, described valve seat forms the section tab-like ring-type wing portion relative with the described extension of described valve body, when described valve body was risen, the described ring-type fin portion of the described extension of described valve body and described valve seat contacted and makes described delivery port liquid sealing.

2. the waterworks of automatic ice-making plant according to claim 1 is characterized in that, described delivery port possesses the outside bottom that is installed on described quantitative cistern, and described valve body closely is fixed in ring bodies bottom the described outside.

3. the waterworks of automatic ice-making plant according to claim 2 is characterized in that, described valve body has the annular projection that forms in the outside of described ring-type fin portion.

4. the waterworks of automatic ice-making plant according to claim 1 is characterized in that, form through hole on described installing component, through this through hole and with the internal communication of described seal.

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