CN102410683A - Method and device for preparing fluidized ice slurry with disc type double-sided scraped-surface heat exchanger - Google Patents
Method and device for preparing fluidized ice slurry with disc type double-sided scraped-surface heat exchanger Download PDFInfo
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- CN102410683A CN102410683A CN2010106189555A CN201010618955A CN102410683A CN 102410683 A CN102410683 A CN 102410683A CN 2010106189555 A CN2010106189555 A CN 2010106189555A CN 201010618955 A CN201010618955 A CN 201010618955A CN 102410683 A CN102410683 A CN 102410683A
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Abstract
The invention discloses a method and device for preparing fluidized ice slurry with a disc type double-sided scraped-surface heat exchanger. The device comprises a disc type double-sided scraped-surface heat exchanger, an ice crystal ager and a delivery pump, wherein the ice crystal ager is located above the scraped-surface heat exchanger; an inlet of the ice crystal ager is communicated with the scraped-surface heat exchanger; a discharge hole of the ice crystal ager is connected with the delivery pump; the scraped-surface heat exchanger comprises a refrigeration disc, a scraper and a rotary shaft; a through hole is formed in the middle of the refrigeration disc; the rotary shaft vertically passes through the through hole; the refrigeration disc comprises two refrigeration surfaces; and the scraper is close to the refrigeration surfaces and is fixed on the rotary shaft. The device disclosed by the invention has the advantages of simple structure, good heat transfer effect and low energy consumption.
Description
Technical field
The present invention relates to Freeze Concentration Technology, be specifically related to a kind ofly produce the method and the device of fluidization ice slurry, be applicable to the aqueous solution such as freeze concentration fruit juice, milk, also can be used for ice making cold-storage technical field with the two-sided shaving heat exchanger of butterfly.
Background technology
Fluidization ice slurry is meant that the cooling back forms ice crystal in the water or the aqueous solution, and this ice crystal is in small, broken bits, but is mixed into the fluidization ice slurry of pump with water.Fluidization ice slurry has higher heat exchange efficiency than ice cube, and produces that the required refrigerant of fluidization ice slurry is general only to need-5～-7 ° of C, and therefore, fluidization ice slurry is widely used in technical fields such as freeze concentration.
Freeze Concentration Technology is that the water or the aqueous solution are cooled to freezing point or below freezing, makes the part water freezing generate ice crystal, separates ice crystal and mother liquor, has promptly obtained concentrate.Because concentrated solution at low temperatures, the thermal sensitivity in the solution, volatile component are able to effective preservation.Therefore in fields such as food, medicine and chemical industry important application is arranged.Freeze concentration is divided into layer crystallization and two kinds of technologies of suspension crystallization.Wherein, a layer crystallization is water or the aqueous solution with after chill surface contacts, formation one deck ice crystal on chill surface.Along with thickening of ice sheet, solution will thicken gradually.Chinese invention patent " a kind of concentration method of graduate freezing interface " (publication number CN1849937A) discloses the closed heat pump techniques of a kind of employing, the freezing and concentrating method that the aqueous solution is carried out layer crystallization.Chinese invention patent " method of controlling progressive freeze-concentration " (publication number CN1593248A) discloses a kind of through controlling the method that solution flow rate and crystallization temperature realize that optimal control layer crystallization freezing concentrates.Though layer crystallization technology is simple, can wrap up the liquid capsule in the ice sheet, be to be wrapped in the ice sheet promptly by entrainment mother liquor,
Cause the solute loss thereby be difficult to carry out effectively, up hill and dale Separation of Solid and Liquid, and production capacity is little.
Floated crystallization is crystallization in bulk solution, and ice crystal is suspended in the solution.Compare a layer crystallization, it is minimum that floated crystallization has liquid capsule parcel, and crystal is pure, the advantage that equipment capacity is big.
Prior art is produced the method that fluidization ice slurry commonly adopts the shaving heat exchanger.Common shaving heat exchanger is a FT type shaving heat exchanger.It is a cylinder, has worn the refrigeration chuck in its outer circumferential walls, and refrigerant flows through in the refrigeration chuck takes away heat.The internal face of cylinder is a chill surface.Scraper is made the inswept chill surface of circular motion with augmentation of heat transfer and sweep the ice crystal that is generated.This kind shaving heat exchanger is owing to only used the inner surface of cylinder, and along with the increase of refrigerating capacity, the refrigeration heat exchange area that unit volume provided does not catch up with; When carrying out amplification design; That heat exchanger volume can become is huge, take up room, and when refrigeration working medium has pressure, as pressure vessel; Big chuck circle diameter brings difficulty can for design and manufacturing, increases manufacturing cost greatly.On the other hand; Scraper can produce auxiliary energy consumption when scraping ice crystal, the ice crystal that particularly in water, forms is because the cohesive force of ice crystal on chill surface ice crystal very strong, that generate is hard; Need bigger scraper tension force and torque to scrape ice crystal, increased auxiliary energy consumption greatly.
Therefore, to deficiency of the prior art, need badly provide a kind of simple in structure, heat-transfer effect good, energy consumption is low produces the devices and methods therefor of fluidization ice slurry with the shaving heat exchanger.
Summary of the invention
The device that the objective of the invention is to avoid weak point of the prior art and provide the two-sided shaving heat exchanger of a kind of usefulness butterfly simple in structure, that heat-transfer effect good, energy consumption is low to produce fluidization ice slurry, and adopt this device to produce the method for fluidization ice slurry.
The object of the invention is realized through following technical measures:
Provide a kind of and produce the device that fluidization ice is starched, comprise with the two-sided shaving heat exchanger of dish formula
Shaving heat exchanger, ice crystal ager and delivery pump are arranged; Said ice crystal ager is positioned at the top of said shaving heat exchanger, and the inlet of said ice crystal ager is communicated with said shaving heat exchanger, and the discharging opening of said ice crystal ager is connected with delivery pump; Said shaving heat exchanger includes refrigeration disc, scraper and rotating shaft; Have perforation in the middle of the said refrigeration disc, said perforation is vertically passed in said rotating shaft, and said refrigeration disc includes two chill surfaces; Two chill surfaces of said refrigeration disc are respectively arranged with scraper, and said scraper is near said chill surface and be fixed in said rotating shaft.
Said refrigeration disc is the disk of hollow, and the both sides of said disk are chill surface, and said scraper is parallel to and near said chill surface, said scraper vertically passes said rotating shaft and is fixed in said rotating shaft.
Said scraper is made up of a plurality of straight knife sheets.
Said scraper is made up of a plurality of spiral blade hobboing cutters and straight knife sheet, and the shape of the blade of said spiral blade hobboing cutter is made up of forward and reverse screw thread, and the blade of said spiral blade hobboing cutter and the spacing of said chill surface are 0.4～0.8mm.
Said shaving heat exchanger is provided with ultrasonic transducer, and said ultrasonic transducer is used to produce ultrasonic vibration, and acts on water or the aqueous solution and said refrigeration disc.
The frequency of the ultrasonic vibration of ultrasonic transducer is 20～50kHz, and radiant power is the 100～500W/L water or the aqueous solution.
Be provided with agitator in the said ice crystal ager.
Use a kind of device of producing fluidization ice slurry with the two-sided shaving heat exchanger of dish formula of the present invention and produce the method for fluidization ice slurry, include following steps:
Steps A: in the refrigeration disc of shaving heat exchanger, feed refrigerant, the water that is cooled or the aqueous solution form ice crystal through shaving heat exchanger refrigeration on two chill surfaces of refrigeration disc, said
Ice crystal is attached on the said chill surface;
Step B: rotating shaft drives the scraper rotation, starts ultrasonic transducer simultaneously, produces ultrasonic vibration and acts on water or the aqueous solution and refrigeration disc, and scraper scrapes the ice crystal on the chill surface;
Step C: the ice crystal that is scraped floats and gets into then in the ice crystal ager to ice crystal ager porch, and ice crystal stirs, disperses through agitator, accomplishes slaking, and ice crystal and water or aqueous solution form fluidised ice slurry;
Step D: the ice slurry of slaking is discharged through delivery pump.
Wherein, in the steps A, when ice crystal is when in water, forming, scraper is made up of a plurality of spiral blade hobboing cutters and straight knife sheet; When ice crystal is when in the aqueous solution, forming, scraper is made up of a plurality of straight knife sheets.
Wherein, among the step B, the frequency of the ultrasonic vibration of ultrasonic transducer is 20～50kHz, and radiant power is the 100～500W/L water or the aqueous solution.
Beneficial effect of the present invention:
A kind of device of producing fluidization ice slurry with the two-sided shaving heat exchanger of dish formula provided by the invention; Said ice crystal ager is positioned at the top of said shaving heat exchanger; The inlet of said ice crystal ager is communicated with said shaving heat exchanger; Ice crystal relies on self buoyancy entering ager, the extra energy consumption of having exempted convey materials.The discharging opening of said ice crystal ager is connected with delivery pump; Said shaving heat exchanger includes refrigeration disc, scraper and rotating shaft; Have perforation in the middle of the said refrigeration disc; Said perforation is vertically passed in said rotating shaft, and said refrigeration disc comprises two chill surfaces, and said scraper is near said chill surface and be fixed in said rotating shaft.The ice that the two-sided shaving heat exchanger of disc formula that the present invention adopts is eliminated on the chill surface effectively blocks, and not only having improved greatly conducts heat imitates
Really, and effectively increased the heat exchange area in the FU volume.The ice crystal come-up that is scraped by scraper gets into the ice crystal ager obtains good fluidity and pumpability after overcuring fluidization ice slurry.Adopt the two-sided shaving heat exchanger of disc formula, help the modularization standardization of heat exchange element, make things convenient for processing and manufacturing.The compound action of scraper and ultrasonic transducer has not only improved heat-transfer effect but also has reduced the auxiliary energy consumption of scraper.
Description of drawings
Utilize accompanying drawing that the present invention is described further, but the embodiment in the accompanying drawing does not constitute this
Any restriction of invention.
Fig. 1 is a kind of structural representation of producing the device of fluidization ice slurry with the two-sided shaving heat exchanger of dish formula of the present invention.
Fig. 2 is the structural representation of the two-sided shaving heat exchanger of disc formula of a kind of embodiment 1 that produces the device that fluidization ice starches with the two-sided shaving heat exchanger of dish formula of the present invention.
Fig. 3 is the structural representation of the two-sided shaving heat exchanger of disc formula of a kind of embodiment 2 that produces the device that fluidization ice starches with the two-sided shaving heat exchanger of dish formula of the present invention.
Fig. 4 is the structural representation of the spiral blade hobboing cutter of a kind of embodiment 2 that produces the device that fluidization ice starches with the two-sided shaving heat exchanger of dish formula of the present invention.
In Fig. 1 to Fig. 4, include:
Refrigerant 1, valve 2;
Shaving heat exchanger 3, refrigeration disc 31, rotating shaft 33;
The water that is cooled or the aqueous solution 6;
Ice crystal ager 9, inlet 91, discharging opening 92;
The specific embodiment
In conjunction with following examples the present invention is further described:
The embodiment 1 of a kind of device of producing fluidization ice slurry with the two-sided shaving heat exchanger of dish formula of the present invention is as depicted in figs. 1 and 2; Include the two-sided shaving heat exchanger of dish formula 3, ice crystal ager 9 and delivery pump 11; Said ice crystal ager 9 is positioned at the top of said shaving heat exchanger 3, and the inlet 91 of ice crystal ager 9 is communicated with shaving heat exchanger 3, and the discharging opening 92 of ice crystal ager 9 is connected with delivery pump 11; Shaving heat exchanger 3 includes refrigeration disc 31, scraper 5 and rotating shaft 33; Have perforation 311 in the middle of the refrigeration disc 31, perforation 311 is vertically passed in rotating shaft 33, and refrigeration disc 31 includes two chill surfaces 312; The chill surface both sides are provided with scraper 5, and scraper 5 is made up of a plurality of straight knife sheets 52.Scraper 5 is parallel to and near chill surface 312, scraper 5 vertically passes rotating shaft 33 and is fixed in rotating shaft 33.Adopt the device of said structure to produce the ice slurry; The refrigeration disc 31 of shaving heat exchanger 3 has two chill surfaces 312; Two-sided scraper 5 is scraped except the obstruction of the ice on the chill surface 311 effectively; Not only improved heat-transfer effect greatly, and reduced the auxiliary energy consumption of scraper 5, the ice crystal come-up that is scraped by scraper 5 gets into
Ice crystal ager 9, the fluidization ice that after overcuring, obtains good fluidity and pumpability starches 7.Have simple in structure, heat-transfer effect good, advantage of low energy consumption.
Concrete, refrigeration disc 31 is the disk of hollow, and refrigerant 1 gets in the disk of hollow from the bottom of refrigeration disc 31, discharges from the upper end of refrigeration disc 31 after the completion heat exchange, and refrigerant 1 can be through valve 2 its flows of control.
In the present embodiment, as embodiment preferred, shaving heat exchanger 3 is provided with ultrasonic transducer 8, and ultrasonic transducer 8 places the below of refrigeration disc 31, and ultrasonic transducer 8 produces ultrasonic wave to chill surface 312 and water that is cooled or the aqueous solution 6 radiation.The water that is cooled or the aqueous solution generate ice crystal on chill surface 312, ice crystal tends to stick on the chill surface 312,
Its adhesive force increases along with decrease of temperature.Ultrasonic transducer 8 sends ultrasonic vibration descends the adhesive force attached to the ice crystal on the chill surface 312, and under the effect of scraper 5, is scraped.The combination of ultrasonic transducer 8 and scraper 5 removed the ice on the chill surface effectively and blocked, and improved the efficient that heat-transfer effect has improved scraper 5 simultaneously greatly, reduced the auxiliary energy consumption of scraper 5.
Concrete, the frequency of the ultrasonic vibration of ultrasonic transducer 8 is 20～50kHz, radiant power is 100～500W/L aqueous solution.
In the present embodiment; Be provided with agitator 10 in the ice crystal ager 9; The nascent state ice crystal that is the reunion shape that is scraped borrows buoyancy to rise to inlet 31 places of the ice crystal ager 9 that is positioned at shaving heat exchanger 3 tops; Be stirred device 10 again and drive, disperse, and move to the other end of ice crystal ager 9 gradually, accomplish the slaking of ice crystal simultaneously.Slaking is meant Ostwald ripening effect (Ostwald ripening), is adiabatic process of large quantities of crystal.Because the surface curvature of the ice crystal that generates is very big, melt less than the ice crystal of cut off diameter, absorb heat of fusion and make local temperature
Degree descends, and discharges crystalline material (water), and absorbs moisture greater than the ice crystal of cut off diameter
And growth becomes big, and ice crystal is transformed into then by the thin crystalline substance of inter-adhesive dendroid and is approximate spherical
Crystal ice granule.The ice crystal after the slaking and the aqueous solution form fluidization ice slurry 7, have good flowability and pumpability, and fluidization ice slurry 7 is discharged through delivery pump 11 by the discharging opening 92 of ice crystal ager 9.
The operation principle of a kind of device of producing fluidization ice slurry with the two-sided shaving heat exchanger of dish formula of the present invention is following:
The embodiment 2 of a kind of device of producing fluidization ice slurry with the two-sided shaving heat exchanger of dish formula of the present invention is like Fig. 3 and shown in Figure 4, is that with the difference of embodiment 1 scraper 5 is made up of a plurality of spiral blade hobboing cutters 51 and straight knife sheet 52.Concrete, the shape of the blade 511 of spiral blade hobboing cutter 51 is made up of forward and reverse screw thread.The blade 51 of spiral blade hobboing cutter is 0.4～0.8mm with the spacing of said chill surface 312.
When be cooled be the aqueous solution time, the ice crystal that in the aqueous solution, forms is normally gathered by the thin colony of a large amount of dendroids and forms, and is soft relatively, scrapes easily; When be cooled be pure water the time, the ice crystal that in water, generates is usually crisp hard, stronger to the adhesive force of chill surface 312, relatively more difficulty is scraped
Fall.Therefore, adopt the scraper of being made up of spiral blade hobboing cutter 51 and straight knife sheet 52 5, when not generating ice crystal on the chill surface 312, spiral blade hobboing cutter 51 does not contact with chill surface 312.Spiral blade hobboing cutter 51 just pivots under the drive of rotating shaft 33, does not have rotation.And on chill surface 312, generate and its thickness during greater than the spacing of spiral blade hobboing cutter 51 and chill surface 312 when ice crystal; 51 pairs of ice crystals of spiral blade hobboing cutter produce a pressure at right angle; Crisp hard ice crystal is burst apart; Spiral blade hobboing cutter 51 pressed ice crystal that rotation takes place simultaneously, and the ice crystal that bursts apart loses the adhesive force to chill surface 312, was scraped by straight knife sheet 52 subsequently.
The ultrasonic vibration that ultrasonic transducer 8 sends can improve the efficient of scraper 5, further reduces the auxiliary energy consumption of scraper 5.
Use a kind of device of producing fluidization ice slurry with the two-sided shaving heat exchanger of dish formula of the present invention and produce the method for fluidization ice slurry, to shown in Figure 4, include following steps like Fig. 1:
Steps A: in the refrigeration disc of shaving heat exchanger, feed refrigerant 1, the water that is cooled or the aqueous solution 6 form ice crystal on two chill surfaces 312 of refrigeration disc 31, and said ice crystal is attached on the said chill surface 312;
Step B: rotating shaft 33 drives scraper 5 rotations, starts ultrasonic transducer 8 simultaneously, produces ultrasonic vibration and acts on water or the aqueous solution 6 and the refrigeration disc 31 that is cooled, and scraper 5 scrapes the ice crystal on the chill surface 312;
Step C: the ice crystal that is scraped floats to advance then to inlet 91 places of ice crystal ager 9
Go in the ice crystal ager 9, ice crystal stirs, disperses through agitator 10, accomplishes slaking, ice crystal
Mix the fluidised ice slurry 7 of formation with the water that is cooled or the aqueous solution 6;
Step D: the fluidization ice slurry 7 of slaking is discharged through delivery pump 11.
Preferably, in the steps A, when ice crystal is when in water, forming, scraper 5 is made up of with straight knife sheet 52 a plurality of spiral blade hobboing cutters 51.
Preferably, in the steps A, when ice crystal is when in the aqueous solution, forming, scraper 5 is made up of a plurality of straight knife sheets 52.
Preferred, among the step B, the frequency of the ultrasonic vibration of ultrasonic transducer is 20～50kHz, and radiant power is the 100～500W/L water or the aqueous solution.
Should be noted that at last; Above embodiment is only in order to technical scheme of the present invention to be described but not to the restriction of protection domain of the present invention; Although the present invention has been done detailed description with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the essence and the scope of technical scheme of the present invention.
Claims (10)
1. device of producing fluidization ice slurry with the two-sided shaving heat exchanger of dish formula; It is characterized in that: include shaving heat exchanger, ice crystal ager and delivery pump; Said ice crystal ager is positioned at the top of said shaving heat exchanger, and the inlet of said ice crystal ager is communicated with said shaving heat exchanger, and the discharging opening of said ice crystal ager is connected with delivery pump; Said shaving heat exchanger includes refrigeration disc, scraper and rotating shaft; Have perforation in the middle of the said refrigeration disc, said perforation is vertically passed in said rotating shaft, and said refrigeration disc includes two chill surfaces; Two chill surfaces of said refrigeration disc are respectively arranged with scraper, and said scraper is near said chill surface and be fixed in said rotating shaft.
2. a kind of device of producing fluidization ice slurry with the two-sided shaving heat exchanger of dish formula according to claim 1; It is characterized in that: said refrigeration disc is the disk of hollow; The both sides of said disk are chill surface; Said scraper is parallel to and near said chill surface, said scraper vertically passes said rotating shaft and is fixed in said rotating shaft.
3. according to claim 2ly a kind ofly produce the device of fluidization ice slurry with the two-sided shaving heat exchanger of dish formula, it is characterized in that: said scraper is made up of a plurality of straight knife sheets.
4. a kind of device of producing fluidization ice slurry with the two-sided shaving heat exchanger of dish formula according to claim 2; It is characterized in that: said scraper is made up of a plurality of spiral blade hobboing cutters and straight knife sheet; The shape of the blade of said spiral blade hobboing cutter is made up of forward and reverse screw thread, and the blade of said spiral blade hobboing cutter and the spacing of said chill surface are 0.4～0.8mm.
5. a kind of device of producing fluidization ice slurry with the two-sided shaving heat exchanger of dish formula according to claim 1; It is characterized in that: said shaving heat exchanger is provided with ultrasonic transducer; Said ultrasonic transducer is used to produce ultrasonic vibration, and acts on water or the aqueous solution and said refrigeration dish
Dish.
6. according to claim 5ly a kind ofly produce the device of fluidization ice slurry with the two-sided shaving heat exchanger of dish formula, it is characterized in that: the frequency of the ultrasonic vibration of said ultrasonic transducer is 20～50kHz, and radiant power is the 100～500W/L water or the aqueous solution.
7. according to claim 1ly a kind ofly produce the device of fluidization ice slurry, it is characterized in that: be provided with agitator in the said ice crystal ager with the two-sided shaving heat exchanger of dish formula.
8. application rights requires 1 described a kind of device of producing fluidization ice slurry with the two-sided shaving heat exchanger of dish formula to produce the method for fluidization ice slurry, it is characterized in that including following steps:
Steps A: in the refrigeration disc of shaving heat exchanger, feed refrigerant, the water that is cooled or the aqueous solution form ice crystal through shaving heat exchanger refrigeration on two chill surfaces of refrigeration disc, and said ice crystal is attached on the said chill surface;
Step B: rotating shaft drives the scraper rotation, starts ultrasonic transducer simultaneously, produces ultrasonic vibration and acts on water or the aqueous solution and refrigeration disc, and scraper scrapes the ice crystal on the chill surface;
Step C: the ice crystal that is scraped floats and gets into then in the ice crystal ager to ice crystal ager porch, and ice crystal stirs, disperses through agitator, accomplishes slaking, and ice crystal and water or aqueous solution form fluidised ice slurry;
Step D: the ice slurry of slaking is discharged through delivery pump.
9. the method for producing fluidization ice slurry according to claim 8 is characterized in that: in the said steps A, when ice crystal is when in water, forming, scraper is made up of a plurality of spiral blade hobboing cutters and straight knife sheet; When ice crystal is when in the aqueous solution, forming, scraper is by a plurality of straight knife sheet groups
Become.
10. the method for producing fluidization ice slurry according to claim 8, it is characterized in that: among the said step B, the frequency of the ultrasonic vibration of ultrasonic transducer is 20～50kHz, and radiant power is the 100～500W/L water or the aqueous solution.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106189555A CN102410683A (en) | 2010-12-31 | 2010-12-31 | Method and device for preparing fluidized ice slurry with disc type double-sided scraped-surface heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106189555A CN102410683A (en) | 2010-12-31 | 2010-12-31 | Method and device for preparing fluidized ice slurry with disc type double-sided scraped-surface heat exchanger |
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| CN2010106189555A Pending CN102410683A (en) | 2010-12-31 | 2010-12-31 | Method and device for preparing fluidized ice slurry with disc type double-sided scraped-surface heat exchanger |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104729177A (en) * | 2015-03-09 | 2015-06-24 | 深圳市兄弟制冰系统有限公司 | Ice and water mixer |
| CN107837560A (en) * | 2017-12-12 | 2018-03-27 | 东莞理工学院 | A kind of aqueous solution continuously freezes concentration systems and method |
| CN109140855A (en) * | 2018-10-12 | 2019-01-04 | 青岛瑞焓清洁能源供热研究院 | A kind of cold water phase-change energy heat pump ice discharge apparatus and system |
| WO2023002881A1 (en) * | 2021-07-20 | 2023-01-26 | ブランテックインターナショナル株式会社 | Ice-making device and ice-making method |
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| CN109140855A (en) * | 2018-10-12 | 2019-01-04 | 青岛瑞焓清洁能源供热研究院 | A kind of cold water phase-change energy heat pump ice discharge apparatus and system |
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Application publication date: 20120411 |