CN102549359B

CN102549359B - Refrigerator/freezer ice maker

Info

Publication number: CN102549359B
Application number: CN201080041190.1A
Authority: CN
Inventors: 森下高丽雄; 八木裕
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2009-09-16
Filing date: 2010-04-07
Publication date: 2014-04-16
Anticipated expiration: 2030-04-07
Also published as: JP4680311B2; CN102549359A; WO2011033804A1; MY153321A; JP2011064373A

Abstract

Disclosed is an ice maker (10) that is disposed in the ice making chamber (4) of a refrigerator/freezer (1). The ice maker comprises an ice tray (20) that makes ice by means of cold air that is sucked into the ice making chamber, a thermistor (25) that measures the temperature within the ice tray, a heater (31) that heats the ice tray from below, and a control unit (50) that controls the operation of a freezing cycle and the passage of electric current to the heater using the temperature measured by the thermistor as a criteria. The control unit performs a freezing preparation step in which, after water has been supplied to the ice tray, a "preheating" electric current is passed to the heater until the temperature measured by the thermistor falls below freezing; an ice melting step in which, after the temperature measured by the thermistor has fallen below freezing, a "rapid heating" electric current is passed to the heater for a given period of time only; and a freezing progression step in which a "normal heating" electric current is passed to the heater until the temperature measured by the thermistor falls to a prescribed temperature.

Description

The ice maker of freezing-cooling storeroom

Technical field

The present invention relates to a kind of ice maker of freezing-cooling storeroom.

Background technology

Freezing-cooling storeroom has the ice maker that utilizes freezing cold air to carry out ice making conventionally.The example of the ice maker arranging in freezing-cooling storeroom can be with reference to patent documentation 1-6.

The transparency of the ice of conventionally, manufacturing with the ice maker of freezing-cooling storeroom is lower.So all manage to improve the transparency of ice all the time.The ice maker that patent documentation 1-6 records has also carried out such research.

In the ice maker of recording at patent documentation 1,2, heater is set above ice-making disc, the top that makes ice-making disc in the condition of high temperature, and generates ice from the bottom of ice-making disc inside than bottom successively upward.Thus, in the generative process of ice, the air in water easily flows out from top, can manufacture not aeriferous transparency ice.The ice maker that patent documentation 3 is recorded also arranges heater above ice-making disc.

In the ice maker of recording at patent documentation 4-6, transparency ice part and white casse ice part are generated with connection status, when separate ice, transparency ice part and white casse ice part are cut off, white casse ice part is remained in ice-making disc, only take out transparency ice part.

Patent documentation 1: No. 4-260768, Japanese Patent Publication communique Unexamined Patent

Patent documentation 2: No. 5-196331, Japanese Patent Publication communique Unexamined Patent

Patent documentation 3: No. 1-203869, Japanese Patent Publication communique Unexamined Patent

Patent documentation 4: No. 2007-232336, Japanese Patent Publication communique JP

Patent documentation 5: No. 2008-151504, Japanese Patent Publication communique JP

Patent documentation 6: No. 2008-157619, Japanese Patent Publication communique JP

Summary of the invention

The object of the present invention is to provide a kind of ice maker of the freezing-cooling storeroom with the new construction that generates transparency ice.

According to the preferred embodiment of the present invention, the ice maker of freezing-cooling storeroom comprises: ice-making disc, be configured in ice-making compartment, and utilize the cold air being blown in described ice-making compartment to carry out ice making; Thermistor, measures the temperature in described ice-making disc; Heater, heats described ice-making disc from below; And control part, measurement temperature based on described thermistor, carry out the running control of cooling cycle system and the energising control of described heater, after supplying water to described ice-making disc, described control part is switched on to described heater, control icing development, and described control part to described heater with " conventionally heating ", " preheating " that caloric value is less than " heating conventionally ", caloric value than the control of switching on of " heating conventionally " large " Fast Heating " three phases, at the initial stage to described heater energising, with " Fast Heating ", carry out ice melting step.

By ice-making disc being heated from below with heater and freezing, transparency ice is not the position growth from contacting with ice-making disc inner surface, but from leaving the position growth of ice-making disc inner surface.When having frozen, owing to flowing out air from peripheral part, so residual bubble impression and form concavo-convexly on surface, but the jog of outer surface is dissolved in liquid fast, makes liquid cooling fast, the last only part of residual transparency ice.Thus, can provide transparency ice to swim in the view in liquid to user.

During ice making, if adhere to existing ice at ice-making disc inner surface, hinder and obtain transparency ice, but generate transparency ice owing to existing ice temporarily being melted to rear transfer, so can make the part of transparency ice become large.

According to the preferred embodiment of the present invention, on the basis of the ice maker of the freezing-cooling storeroom of said structure, described control part is after supplying water to described ice-making disc, carry out following steps: preparation process freezes, before the measurement temperature of described thermistor drops under freezing point, described heater is carried out to " preheating " energising; Ice melting step, after the measurement temperature of described thermistor drops under freezing point, carries out " Fast Heating " energising to described heater within a certain period of time; And icing development step, before the measurement temperature of described thermistor drops to set point of temperature, described heater is carried out to " heating conventionally " energising.

According to this structure, suitably regulate the heating of heater, can generate reliably transparency ice.

According to the preferred embodiment of the present invention, on the basis of the ice maker of the freezing-cooling storeroom of said structure, in described icing preparation process, when the compressor in described cooling cycle system enters stopping period, described control part is ended to described heater energising.

Freezing in preparation process, require heater to slow down temperature and sharply reduce.In compressor operation, by heater energising, can realize described object, but compressor stopping period has slowed down temperature reduction naturally, because the necessity of heater energising is little, so end to switch on to heater.Thus, can the power consumption of meaningless ground.

According to the preferred embodiment of the present invention, on the basis of the ice maker of the freezing-cooling storeroom of said structure, in described icing preparation process, in the measurement temperature of described thermistor, when setting is above, described control part is ended to described heater energising.

If until the water temperature supplying water to ice-making disc when high to heater energising, the ice making time is elongated.According to this structure, if the measurement temperature of thermistor for example more than 1 ℃ time, is ended to heater energising,, until water can not produce while freezing from position contact with ice-making disc, to heater, switch on, can avoid meaningless power consumption.

According to the preferred embodiment of the present invention, on the basis of the ice maker of the freezing-cooling storeroom of said structure, in described ice melting step, no matter the compressor in described cooling cycle system is in running or in stopping, and described control part all carries out " Fast Heating " energising to described heater.

According to this structure, can make ice melt quickly.

According to the preferred embodiment of the present invention, on the basis of the ice maker of the freezing-cooling storeroom of said structure, in described icing development step, when the compressor in described cooling cycle system enters stopping period, described control part is ended to described heater energising, and after compressor again entry into service, within a certain period of time described heater is carried out to " Fast Heating " energising.

Due to when compressor stops, the temperature controlled necessity of utilizing heater to switch on to carry out is little, so now end energising, avoids meaningless power consumption.But, because ending to switch on to heater, when compressor again entry into service, likely at the inner surface of ice making unit, produce and freeze, so after compressor again entry into service, only within a certain period of time heater is carried out to " Fast Heating " energising, if produced and frozen at the inner surface of ice-making disc, melted.Thus, although heater is intermittently switched on, also can generate continuously transparency ice.

According to the preferred embodiment of the present invention, on the basis of the ice maker of the freezing-cooling storeroom of said structure, in described icing development step, measurement temperature at described thermistor drops to after set point of temperature, described control part stops to described heater energising, and after certain hour, make separate ice device carry out separate ice action.

According to this structure, generate reliably after transparency ice, carry out separate ice action, transparency ice is placed to operable state.

According to the preferred embodiment of the present invention, on the basis of the ice maker of the freezing-cooling storeroom of said structure, in described icing development step, measurement temperature at described thermistor drops to after set point of temperature, described control part reduces the electrical current of described heater gradually until stop energising, and after certain hour, make separate ice device carry out separate ice action.

The temperature of each ice making unit of ice-making disc may not be entirely consistent with the measurement temperature of thermistor.Even if the measurement temperature of thermistor drops to set point of temperature, the temperature of the ice making unit of a part does not also drop to this degree, sometimes may residual not icing water.Be not to drop to set point of temperature as opportunity take the measurement temperature of thermistor, stop to heater energising quickly, but by electrical current is reduced gradually until stop the processing of energising, can prevent because of water not icing and residual.

According to the preferred embodiment of the present invention, on the basis of the ice maker of the freezing-cooling storeroom of said structure, when the indoor temperature of described ice-making compartment or the cold air temperature that is blown into described ice-making compartment are when setting is above, it is low-intensity that described control part makes the electrical current of described heater.

According to this structure, by only switching on to heater to control the needed heat part of development of freezing, can make iceman's order optimization.

According to the preferred embodiment of the present invention, on the basis of the ice maker of the freezing-cooling storeroom of said structure, when outside air temperature is low, temperature of refrigerating chamber is set for when higher, described control part reduces the rotating speed of the compressor in described cooling cycle system and to described ice-making compartment, sends into the rotating speed of the pressure fan of cold air.

If temperature of refrigerating chamber is set for highlyer when outside air temperature is low, conventionally shorten the duration of runs of compressor, and the time of cold air contact ice-making disc shortens, and makes ice making time lengthening.In this case, by the rotating speed of compressor and the rotating speed of pressure fan are all reduced, extend the duration of runs of compressor, can shorten the ice making time.

According to the present invention, by ice-making disc being heated simultaneously and frozen from below with heater, although the vestige of the bubble flowing out from peripheral part is concavo-convex in surface generation, accounts for most core and can obtain transparent ice.In addition, can prevent power wastage, make ice making operation optimization, and can obtain homogeneous transparency ice.

Accompanying drawing explanation

Fig. 1 is the front view of the freezing-cooling storeroom with ice maker of the preferred embodiment for the present invention.

Fig. 2 is the freezing-cooling storeroom partial vertical sectional view that represents ice maker.

Fig. 3 is and the meet at right angles vertical sectional view of the ice maker that direction cuts open of Fig. 2.

Fig. 4 is the ice-making disc of upper and lower inverted status and the stereogram with the thermistor of its combination.

Fig. 5 be the ice-making disc of upper and lower inverted status and with the heater of its combination and the stereogram of lid.

Fig. 6 is the stereogram of the state of the lid of mounting heater in the ice-making disc of upper and lower inverted status.

Fig. 7 is the control block diagram of freezing-cooling storeroom.

Fig. 8 is the flow chart that represents ice maker action.

Fig. 9 is the flow chart that represents the difference action of ice maker.

Description of reference numerals

1 freezing-cooling storeroom

4 ice-making compartments

10 ice makers

11 pipelines

13 cold air blow-off outlets

20 ice-making disc

21 ice making unit

24 separate ice devices

25 thermistors

31 heaters

34 lids

45 wind shutters

50 control parts

51 compressors

52 pressure fans

53 water supply installations

The specific embodiment

The structure of the freezing-cooling storeroom with ice maker to the preferred embodiment for the present invention describes with reference to the accompanying drawings.Freezing-cooling storeroom 1 shown in Fig. 1 comprises: the refrigerating chamber 2 with double-

open type door

3L, 3R of the superiors; The ice-making compartment with door 54 of its lower one deck and the refrigerating chamber 6 with door 7; The refrigerating chamber 8 of the drawer type of its lower one deck; And the vegetable compartment 9 of undermost drawer type.By the not shown cooling cycle system that comprises compressor and heat exchanger, generate cold air, and this cold air is assigned to each chamber by pipeline, in each chamber, obtain needed refrigerated storage temperature or cryogenic temperature.Because this structure is well-known, so be not elaborated.

At the top of ice-making compartment 4, be provided with the ice maker 10 shown in Fig. 2 and Fig. 3.Also with reference to Fig. 4, to Fig. 6, its structure is described below.

Fig. 2 is the cutaway view from the ice maker 10 of the left surface direction observation of freezing-cooling storeroom 1.On the wall of the depths of ice-making compartment 4, be formed with pipeline 11, this pipeline 11 is for being blown into cold air to ice-making compartment 4.Ice-making disc shell 12 extends towards front from the upper end of pipeline 11.For the ice that makes to manufacture in ice-making disc falls, the lower surface opening of ice-making disc shell 12.On pipeline 11, towards the inside of ice-making disc shell 12, be formed with cold air blow-off outlet 13.

In the inside of ice-making disc shell 12, receiving the position of the cold air blowing out from cold air blow-off outlet 13, dispose ice-making disc 20.Even if ice-making disc 20 is by the molding synthetic resin that also can not follow the string at low temperatures.In addition,, if the bubble in the water providing is attached on the inner surface of ice-making disc 20, be difficult to obtain transparency ice.Therefore, the processing that preferably makes bubble be difficult to adhere to, for example, using the material of allocating silicon in polypropylene into as moulding material, or by the ice-making disc 20 after fluororesin coating molding.

The particulate that the static producing because of ice-making disc 20 surfaces adsorbs also hinders generation transparency ice.Therefore, preferably adopt following countermeasure: for example by the material of allocating the resin of silicon into or sneaking into the so difficult generation static of the resin of antistatic agent, ice-making disc 20 is carried out to moulding, or apply antistatic agent in the ice-making disc after moulding 20.

It is the trapezoidal ice making unit 21 for the manufacture of ice that ice-making disc 20 has eight sections.Two row four lines are lined up in eight ice making unit 21, and therefore the flat shape of ice-making disc 20 is elongated.Be configured to make its long side direction consistent with the depth direction of freezing-cooling storeroom 1 elongated like this ice-making disc 20.

On an end of ice-making disc 20 long side directions, be provided with bolster 22, on another end, be provided with receptacle portion 23.Bolster 22 rotates and is bearing in freely on ice-making disc shell 12.Receptacle portion 23 with the separate ice device 24(that is arranged on ice-making disc shell 12 inside with reference to Fig. 3) be coupling and close, by separate ice device 24, supported.Bolster 22 and receptacle portion 23 are configured on same level axis.Separate ice device 24 has motor and deceleration device, makes ice-making disc 20 scope that turns an angle take described horizontal axis as turning cylinder.

On the lower surface of ice-making disc 20, on the position between the two ice making unit 21 that are listed as, disposing thermistor 25 side by side.Thermistor 25 is measured the internal temperature of ice making unit 21 across the wall of ice making unit 21.

The fixing thermistor 25 of thermistor lid 26.Pin 27 from four jiaos of thermistor lid 26 towards outstanding with the rectangular direction of long side direction of ice-making disc 20.Four shanks 28 are given prominence in the mode of surrounding thermistor 25 from the lower surface of ice-making disc 20.At the front end of shank 28, be formed with the horizontal hole 29 that pin 27 is passed through.Overlapping on thermistor 25 have a thermistor protective layer 30, and overlapping thereon have a thermistor lid 26, by pin 27 is engaged with the horizontal hole 29 of shank 28, and fixing thermistor 25.

On the lower surface of ice-making disc 20, except disposing thermistor 25, also dispose the heater 31 shown in Fig. 5.By covering heater strip with silicones, form heater 31, it is soft that heater 31 is made entirety, can be driven in the torsion of ice-making disc 20.In the apex portion of the inverted status up and down of each ice making unit 21, be formed with the parallel rib 32 that holds heater 31.

Parallel rib 32 is formed with predetermined distance configured in parallel by two ribs, sets the interval between rib, thereby holds heater 31 in the mode of matched in clearance.The interval of setting like this between rib is because when ice-making disc 20 twists, and heater 31 can be freely movable to a certain extent.

Heater 31 is configured to be symmetric shape in the long side direction center line left and right of ice-making disc 20.In embodiment, global shape is roughly U-shaped.On the position of the open end of U-shaped, be connected with a pair of supply lines 33.

Because the design caloric value of heater 31 is little, so be that very thin heater strip is wrapped in to the structure on the core of glass fibre, if reversed to the direction of taking up, heater strip easily cuts off.Therefore as previously mentioned,, except heater 31 to a certain extent can free activity, also to make heater 31 configured in one piece become not bear the shape of excessive power on heater strip.

Heater 31 is put into parallel rib 32, heater 31 is close on the lower surface of ice-making disc 20, and with lid 34, cover the lower surface of ice-making disc 20.Covering 34 roles is to prevent that cold air from entering the bottom surface section of ice-making disc 20, makes the uniformity of temperature profile between each ice making unit 21, and heater 31 is pressed and is limited in parallel rib 32.

Lid 34 is rectangular pallet shapes, is formed with the ring 35 that bolster 22 is passed through at one end.Make to encircle 35 chimeric with bolster 22, and covering 34, be arranged in ice-making disc 20 with two screws 36 and spring 37.The installation of lid 34 is not the activity that fetters securely ice-making disc 20, but pliable and tough, does not affect the torsion of ice-making disc 20 when separate ice.Lid 34 is own the same with ice-making disc 20, even preferably by the molding synthetic resin that also can not follow the string at low temperatures.

On lid 34, near near the two ends of long side direction center line, be formed with two through holes 38.In addition,, than the central position of the more close lid of through hole 38, be formed with and long side direction center line be clipped in the middle and two symmetrical through holes 39.Through hole 38 is circular, and the section that makes to be formed on ice-making disc 20 lower surfaces is that circular projection 40 is passed through.Through hole 39 is rectangle, and the spring fitting rib 41 being formed on ice-making disc 20 lower surfaces is passed through.

If be screwed into screw 36 in the projection 40 of exposing from through hole 38, be fixed, cover 34 in the mode as anticreep retainer screw 36, be retained and can move along the axis of projection 40.That is, screw 36 is not 34 fastening lid, but stop cover 34 separation with ice-making disc 20.

If prevent from covering 34 with screw 36, come off, as shown in Figure 6, spring fitting rib 41 is given prominence to from covering 34 through hole 39.The installation hook 43 at spring 37 two ends is fastened in the horizontal hole 42 of spring fitting rib 41 front ends formation.Spring 37 is to have the mode of hook 43 being installed, having hair clip portion 44 at long side direction both ends at long side direction central portion, by spring steel wire bending forming.

Hair clip portion 44 oliquely downward extends in Fig. 6, in other words, to the direction of ice-making disc 20, extends.Therefore, if be fastened in the horizontal hole 42 of spring fitting rib 41 hair clip portion 44 pressing covers 34 hook 43 is installed.As shown in Figure 3, lid 34 is pressed towards heater 31, with certain load supporting heater 31, heater 31 can not deviate from from parallel rib 32.Thus, heater 31 is close on ice making unit 21, effectively heat is passed to ice making unit 21.

Wind shutter 45 to downward-extension is one-body molded on two edges of long side direction of ice-making disc 20.Wind shutter 45 stops the cold air that blows to ice-making disc 20 from top around to below.Therefore, can prevent that cold air from entering into the lower surface of ice-making disc 20 and damaging the heating effect of heater 31, makes cold air concentrate on the upper surface of ice-making disc 20.

On wind shutter 45, and ice making unit 21 between consistent position, border be formed with recess 46.The in the situation that of embodiment, a wind shutter 45 has two recesses 46.If recess 46 is not set,, when ice-making disc 20 is reversed, the stress of wind shutter 45 concentrates on a position, and the resin material at this position is stage generation albefaction in early days, and develops into be full of cracks.By forming recess 46, make stress dispersion, can prevent albefaction and be full of cracks.

As shown in Figure 3, between wind shutter 45 and lid 34, be provided with gap 47, thereby also can not produce and be in contact with one another when ice-making disc 20 being reversed for separate ice.

On the end of bolster 22 1 sides of ice-making disc 20, on single side, be formed with projection 48.Projection 48 is for reversing ice-making disc 20 when the separate ice.

Control part 50 shown in Fig. 7 carries out entirety to freezing-cooling storeroom 1 to be controlled, the running control that comprises cooling cycle system and the energising control to heater 31.On control part 50 except being connected with separate ice device 24 and heater 31, be also connected with become the compressor 51 of a link of cooling cycle system, to each portion in storehouse send the pressure fan 52 of cold air, the water supply installation 53, the temperature sensor 54 that to ice maker 10, supply water and be configured in ice quantity sensor 55 in ice-making compartment 4 etc.Temperature sensor 54 comprises and is configured in the temperature elements such as the thermistor of each several part, wherein also comprises thermistor 25.

Control part 50 is made following three phases the channel electric controlled of heater 31.That is, " conventionally heating ", " preheating " that caloric value is less than " heating conventionally ", caloric value are than " heating conventionally " large " Fast Heating ".The power consumption that for example can set " heating conventionally " for is 5～6W, and the power consumption of " preheating " is 2W, and the power consumption of " Fast Heating " is 7～8W, makes caloric value different.

Flow chart below with reference to Fig. 8 describes the action of ice maker 10.When completing separate ice and moving and make ice-making disc 20 turn back to state upwards, flow process starts.

In step #101, control part 50 moves water supply installation 53, to ice-making disc 20, supplies water.

Because the temperature of ice-making compartment 4 is near cryogenic temperature (be set as negative 18 ℃), so if supplied water, the temperature rise of ice-making disc 20.In step #102, thermistor 25 detects this temperature rise.

Because just water supply is just cooled, so just start to reduce after the temporary transient rising of the temperature that thermistor 25 is measured.Now enter step #103.

Step #103 is the preparation process that freezes.Control part 50 carries out " preheating " energising to heater 31, and water temperature is reduced with schedule speed.

In step after this, also utilize heater 31 to heat.By heating and freeze from below to ice-making disc 20 with heater 31, not that position from joining with ice-making disc 20 inner surfaces makes transparency ice growth, but make transparency ice growth from leaving the position of ice-making disc 20 inner surfaces, so easily grow into the ice that transparency is high.

When the compressor midway 51 of step #103 enters stopping period, naturally slowed down temperature reduction.Control part 50 ends heater 31 to switch on, and avoids meaningless power consumption.

When the measurement temperature of thermistor 25 is when setting is above, for example, in the time of more than 1 ℃, control part 50 also ends heater 31 to switch on.Thus, until water can not occur to freeze from the position contacting with ice-making disc 20, heater 31 is switched on, can avoid meaningless power consumption.

In step #104, control part 50 checks whether the measurement temperature of thermistor 25 drops under freezing point.If dropped under freezing point, enter step #105.

Step #105 is ice melting step.Control part 50 only carries out " Fast Heating " energising to heater 31 within a certain period of time, and ice-making disc 20 is heated.Because of the measure error of thermistor 25, from step #104, transfer to step #105 and postpone, and there is ice, be attached to the situation on ice making unit 21 inner surfaces, immediately in this case, in this stage, ice is melted.Therefore, can not produce and hinder the residual ice that obtains homogeneous transparency ice, can transfer to step #106.

In step #105, tube compressor 51 is not in running or in stopping, and control part 50 all carries out " Fast Heating " energising to heater 31.Thus, can make ice melt quickly.

Step #106 is the development step that freezes.Before the measurement temperature of thermistor 25 drops to set point of temperature, control part 50 carries out " heating conventionally " energising to heater 31.

When the compressor midway 51 of step #106 enters stopping period, control part 50 ends heater 31 to switch on, and avoids meaningless power consumption.But, because ending that heater 31 is switched on, when restarting the running of compressor 51, likely at the inner surface of ice-making disc 20, occur to freeze.So, restarting after the running of compressor 51, within a certain period of time heater 31 is carried out to " Fast Heating " energising, if occurred to freeze on the inner surface of ice-making disc 20, melted.Thus, although intermittently heater 31 is switched on, also can generate continuously transparency ice.

In step #107, control part 50 checks whether the measurement temperature of thermistor 25 drops to set point of temperature.If drop to for example set point of temperature of negative 9 ℃, judge that ice making completes, enter into step #108.

In step #108, control part 50 stops heater 31 to switch on.After certain hour, judgement generates transparency ice really, enters step #109.

In step #109, control part 50 makes separate ice device 24 carry out the reversion action of ice-making disc 20.At separate ice device 24, make ice-making disc 20 after bolster 22 rotates, in the stage of reversing before will completing up and down, projection 48 contacts are formed on the not shown retainer on ice-making disc shell 12.Because after this separate ice device 24 also makes ice-making disc 20, be rotated further predetermined angular, so ice-making disc 20 torsional deflections.As previously mentioned, even owing to being provided with and reversing the gap 47 that ice-making disc 20 also can not be in contact with one another between wind shutter 45 and lid 34, so the edge of lid 34 and wind shutter 45 can not send because of phase mutual friction sound or the abrasion mutually of creaky voice.

If ice-making disc 20 is reversed, extrude the ice in ice making unit 21, and fall in the not shown ice container being placed in ice-making compartment 4.After separate ice, separate ice device 24 rotates ice-making disc 20 round about, make ice-making disc 20 turn back to original towards.Thus, complete the ice making operation of one-period.If ice quantity sensor 55 is reported ice amount in ice container not enough, continue to start the ice making operation of next cycle.If ice quantity sensor 55 reports that the ice amount in ice container is enough, ice maker 10 entered between stand-down.

Also can make ice maker 10 move as the flow chart of Fig. 9.In the flow chart of Fig. 9, the step except step #108 ' is identical with the flow chart of Fig. 8.In step #108 ', in the measurement temperature of thermistor 25, drop to after set point of temperature, control part 50 is not directly to stop heater 31 to switch on, but reduces gradually the electrical current of heater 31 until stop energising.

The temperature of each ice making unit 21 may not be all consistent with the measurement temperature of thermistor 25.Even if the measurement temperature of thermistor 25 drops to set point of temperature, the temperature of ice making unit 21 of a part does not drop to this degree, sometimes yet residual not icing water.Be not to drop to set point of temperature as opportunity take the measurement temperature of thermistor 25, stop heater 31 to switch on quickly, but by electrical current is reduced gradually until stop the processing of energising, can anti-sealing not icing and residual.

Control part 50 also can carry out following action.

At the indoor temperature of ice-making compartment 4 or the cold air temperature that is blown into ice-making compartment 4, when setting is above, it is low-intensity that control part 50 makes the electrical current of heater 31.As an example, the design temperature of establishing acquiescence is negative 18 ℃, if temperature higher than negative 18 ℃, the electrical current that makes heater 31 is low-intensity.If temperature is negative below 18 ℃, the electrical current that makes heater 31 is common intensity.

Like this, by only switching on to heater 31 to control the needed heat part of development of freezing, can make iceman's order optimization.

When outside air temperature is low, temperature of refrigerating chamber is set for when higher, control part 50 reduces the rotating speed of compressor 51 and the rotating speed of pressure fan 52.

If temperature of refrigerating chamber is set for highlyer when outside air temperature is low, conventionally shorten the duration of runs of compressor 51, and the time of cold air contact ice-making disc 20 shortens, ice making time lengthening.By the rotating speed of compressor 51 and the rotating speed of pressure fan 52 are all reduced, extended the duration of runs of compressor 51, can shorten the ice making time.

Above the embodiments of the present invention are illustrated, but scope of the present invention is not limited thereto, can in the scope that does not depart from invention aim, with various modes of texturing, implements the present invention.

(industrial applicibility)

The present invention can be widely used in the ice maker of freezing-cooling storeroom.

Claims

1. an ice maker for freezing-cooling storeroom, is characterized in that comprising:

Ice-making disc, is configured in ice-making compartment, utilizes the cold air being blown in described ice-making compartment to carry out ice making;

Thermistor, measures the temperature in described ice-making disc;

Heater, heats described ice-making disc from below; And

Control part, the measurement temperature based on described thermistor, carries out the running control of cooling cycle system and the energising control of described heater,

After supplying water to described ice-making disc, described control part is switched on to described heater, control icing development, and described control part to described heater with " conventionally heating ", " preheating " that caloric value is less than " heating conventionally ", caloric value than the control of switching on of " heating conventionally " large " Fast Heating " three phases, at the initial stage to described heater energising, with " Fast Heating ", carry out ice melting step.

2. the ice maker of freezing-cooling storeroom according to claim 1, is characterized in that,

Described control part, after supplying water to described ice-making disc, is carried out following steps:

Icing preparation process, before the measurement temperature of described thermistor drops under freezing point, carries out " preheating " energising to described heater;

Ice melting step, after the measurement temperature of described thermistor drops under freezing point, carries out " Fast Heating " energising to described heater within a certain period of time; And

Icing development step, before the measurement temperature of described thermistor drops to set point of temperature, carries out " heating conventionally " energising to described heater.

3. the ice maker of freezing-cooling storeroom according to claim 2, is characterized in that, in described icing preparation process, when the compressor in described cooling cycle system enters stopping period, described control part is ended to described heater energising.

4. the ice maker of freezing-cooling storeroom according to claim 2, is characterized in that, in described icing preparation process, in the measurement temperature of described thermistor, when setting is above, described control part is ended to described heater energising.

5. the ice maker of freezing-cooling storeroom according to claim 2, it is characterized in that, in described ice melting step, no matter the compressor in described cooling cycle system is in running or in stopping, and described control part all carries out " Fast Heating " energising to described heater.

6. the ice maker of freezing-cooling storeroom according to claim 2, it is characterized in that, in described icing development step, when the compressor in described cooling cycle system enters stopping period, described control part is ended to described heater energising, and after compressor again entry into service, within a certain period of time described heater is carried out to " Fast Heating " energising.

7. the ice maker of freezing-cooling storeroom according to claim 2, it is characterized in that, in described icing development step, measurement temperature at described thermistor drops to after set point of temperature, described control part stops to described heater energising, and after certain hour, make separate ice device carry out separate ice action.

8. the ice maker of freezing-cooling storeroom according to claim 2, it is characterized in that, in described icing development step, measurement temperature at described thermistor drops to after set point of temperature, described control part reduces the electrical current of described heater gradually until stop energising, and after certain hour, make separate ice device carry out separate ice action.

9. according to the ice maker of the freezing-cooling storeroom described in any one in claim 1 to 8, it is characterized in that, when the indoor temperature of described ice-making compartment or the cold air temperature that is blown into described ice-making compartment are when setting is above, it is low-intensity that described control part makes the electrical current of described heater.

10. according to the ice maker of the freezing-cooling storeroom described in any one in claim 1 to 8, it is characterized in that, when outside air temperature is low, temperature of refrigerating chamber is set for when higher, described control part reduces the rotating speed of the compressor in described cooling cycle system and to described ice-making compartment, sends into the rotating speed of the pressure fan of cold air.