阅读说明：本技术 一种冰块制造设备及其制冰方法 (Ice block manufacturing equipment and ice block manufacturing method thereof ) 是由 王卓俊 于 2021-09-07 设计创作，主要内容包括：本发明公开了一种冰加工设备,更具体地说,涉及一种冰块制造设备及其制冰方法,其技术要点是：一种冰块制造设备及其制冰方法,包括机架和制冷回路,还包括提供水蒸气的供料组件和制冰装置,制冰装置包括用于冻结水蒸气的上半球模组和用于将水悬浮封锁在球形腔室的下半球模组；上半球模组包括用于与制冷回路进行热交互的第一球形模具,第一球形模具表面设有第一半球槽,第一半球槽表面设有排气口,下半球球形模具包括连通供料组件的第二球形模具,第二球形模具表面设有与第一半球槽组成球形腔室的第二半球槽,还包括通过传递超声波使第二半球槽表面产生辐射声压的导振板。使用本发明,可以制得硬度大、透明度高的球形冰块。(The invention discloses an ice processing device, more particularly relates to an ice block manufacturing device and an ice making method thereof, and the technical points are as follows: the ice making device comprises an upper hemisphere module used for freezing water vapor and a lower hemisphere module used for sealing water in a spherical chamber in a suspended manner; the upper hemispherical module comprises a first spherical mould used for carrying out heat interaction with the refrigeration circuit, a first hemispherical groove is formed in the surface of the first spherical mould, an exhaust port is formed in the surface of the first hemispherical groove, the lower hemispherical spherical mould comprises a second spherical mould communicated with the feeding assembly, a second hemispherical groove forming a spherical cavity with the first hemispherical groove is formed in the surface of the second spherical mould, and the upper hemispherical module further comprises a vibration guide plate used for transmitting ultrasonic waves to enable the surface of the second hemispherical groove to generate radiation sound pressure. The spherical ice block with high hardness and high transparency can be prepared by using the method.)

1. An ice making apparatus and a method of making ice therewith, comprising a frame (1) and a refrigeration circuit (2), characterized in that: the ice making device (3) comprises an upper hemisphere module (31) used for liquefying and freezing water vapor and a lower hemisphere module (32) used for being matched with the upper hemisphere module (31) to seal and seal water suspension in a spherical cavity;

the upper hemispherical module (31) comprises a first spherical mold (311) used for carrying out heat interaction with a refrigeration circuit (2), a first hemispherical groove (312) used for wrapping water vapor is formed in the surface of the first spherical mold (311), an air outlet (313) used for exhausting air is formed in the surface of the first hemispherical groove (312), the lower hemispherical spherical mold comprises a second spherical mold (321) communicated with the feeding component (4), a second hemispherical groove (322) forming a spherical cavity with the first hemispherical groove (312) is formed in the surface of the second spherical mold (321), and the upper hemispherical module further comprises a vibration guide plate (323) used for enabling the surface of the second hemispherical groove (322) to generate radiation sound pressure through transmitting ultrasonic waves.

2. The ice making apparatus and the ice making method thereof according to claim 1, wherein: the refrigeration circuit (2) comprises a compressor (22) for pressurization and a condenser (23) for heat dissipation and temperature reduction, and further comprises a capillary tube (24) for throttling and pressure reduction and an evaporator (21) communicated with the upper hemispherical module (31) and used for evaporation and refrigeration, wherein the evaporator (21) comprises a thread groove (212) formed in the surface of the first spherical mold (311), an evaporation pipe (211) which is internally circulated with a refrigerant and attached to the thread groove (212) and used for evaporation and refrigeration, and further comprises an electromagnetic valve (25) which is used for introducing high-temperature gas in the compressor (22) into the evaporation pipe (211) to enable ice blocks to be separated from the first half spherical groove (312).

3. The ice making apparatus and the ice making method thereof according to claim 1, wherein: the whole vibration guide plate (323) is of a spherical structure matched with the surface of the second spherical mold (321), the lower hemispherical module (32) further comprises an ultrasonic generator (324) used for outputting ultrasonic signals and a transducer (325) used for converting electric energy into mechanical vibration, the transducer (325) is connected with an amplitude transformer (326) used for amplifying amplitude generated by the transducer (325), and the upper end of the amplitude transformer (326) is fixedly connected with the vibration guide plate (323).

4. The ice making apparatus and the ice making method thereof according to claim 1, wherein: the vertical groove face of first hemisphere groove (312) is down, the vertical groove face of second hemisphere groove (322) is up, hemisphere module (32) is still including connecting feeding subassembly (4) and filtering steam after to steam filter (327) the inside injection in second hemisphere groove (322) down, the injection direction of steam filter (327) and the radial contained angle in second hemisphere groove (322) bottom are greater than 30.

5. The ice making apparatus and the ice making method thereof according to claim 1 or 4, wherein: the feed assembly (4) comprises a first water tank (41) for storing purified water and a water pump (42) for providing the purified water for the first water tank (41) and keeping the first water tank (41) in a full state, a flow dividing valve (43) for dividing the water is connected to the first water tank (41) through a pipeline, the flow dividing valve (43) is communicated with a steam filter (327) through a pipeline, and the feed assembly further comprises a piezoelectric ceramic piece (44) for atomizing the purified water in the flow dividing valve (43) into water vapor through electronic high-frequency oscillation.

6. The ice making apparatus and the ice making method thereof according to claim 1 or 4, wherein: the feeding assembly (4) further comprises a barometer (45) used for feeding back the internal pressure of the first spherical die (311) and the second spherical die (321) to the piezoelectric ceramic piece (44), and the barometer (45) is arranged at the pipeline connection position of the steam filtering port (327) and the flow dividing valve (43).

7. The ice making apparatus and the ice making method thereof according to claim 1, wherein: the groove surface of the first hemispherical groove (312) is provided with a strip-shaped texture (314) used for increasing the contact area, and the depth of the strip-shaped texture (314) is not more than 2 mm.

8. The ice making apparatus and the ice making method thereof according to claim 1, wherein: the first spherical mold (311) is connected with the second spherical mold (321) through a hinge, the ice making device (3) further comprises a rotating shaft (34) which enables the second spherical mold (321) to be separated from the second spherical mold (321) through overturning, and a hydrophobic layer (328) for dewatering is arranged on the surface of the second hemispherical groove (322).

9. The ice making apparatus and the ice making method thereof according to claim 5, wherein: the feeding assembly (4) further comprises a return pipe (46) used for receiving air and enabling water vapor in the air to be condensed and returned, the return pipe (46) is integrally in a threaded pipe shape, one end of the return pipe (46) is connected with the exhaust port (313) through a pipeline, the other end of the return pipe is communicated with a filter (47) used for filtering, and the filter (47) is connected with a second water tank (48) used for storing and recovering the water vapor.

10. A method of making ice cubes using the ice cube of claim, comprising: the method comprises the following steps:

step S1: atomizing, namely transmitting a high-frequency oscillation to a first water tank (41) of a feeding assembly (4) by using a piezoelectric ceramic piece (44), and atomizing raw materials for manufacturing ice balls in the first water tank (41) into steam;

step S2: injecting, namely injecting steam obtained by atomization into a spherical cavity formed by an upper hemispherical module (31) and a lower hemispherical module (32) from bottom to top;

step S3: liquefying and precooling, namely fixedly connecting the upper end of the spherical cavity with a refrigerating circuit (2), and carrying out heat interaction on the spherical cavity by utilizing the refrigerating circuit (2) to liquefy and precool the steam entering the spherical cavity into liquid water;

step S4: suspension cavitation, namely transmitting ultrasonic oscillation to a spherical cavity by using an energy converter (325), manufacturing radiation sound pressure on the inner wall of the spherical cavity, performing suspension lifting on liquefied liquid water, and simultaneously enabling the inside of the liquid water to generate a cavitation effect, wherein the thickness of the radiation sound pressure is controlled between 500 micrometers and 800 micrometers;

step S5: exhausting, namely continuously exhausting steam, raising the water level of liquid water, and exhausting air in the spherical cavity from an exhaust port (313) of the upper hemispherical module (31) when the liquid water rises;

step S6: extruding and freezing, namely amplifying the ultrasonic transducer (325) by increasing the voltage at two ends of the amplitude transformer (326) when the liquid water reaches 90% of the capacity of the spherical cavity, and extruding the liquid water by the amplified radiation sound pressure until the liquid water is completely frozen;

step S7: and (3) deicing, namely overturning the lower hemispherical module (32), exposing the lower surface of the spherical ice block, then pouring high-temperature gas in the compressor (22) into the evaporator (21) through the electromagnetic valve (25), melting the contact surface of the spherical ice block and the upper hemispherical module (31), and enabling the spherical ice block to be separated from the upper hemispherical module (31) and enter the refrigerator (5) to finish the preparation of the spherical ice block.

Technical Field

The invention relates to the field of ice processing, in particular to ice block manufacturing equipment and an ice making method thereof.

Background

In the beverage and cold drink service industry, people like to make ice cubes into spherical ice cubes to cool drinks, not only for aesthetic consideration, but also for more important, the small heat absorption surface of the spherical ice cubes can greatly delay the melting speed of the ice cubes and avoid the reduction of the eating mouthfeel caused by the rapid dilution of the beverages. But the requirement of spherical ice cube to hardness is higher simultaneously, because spherical ice cube is whole to be spherical, contacts with point-to-point form in the storage process for the pressure that collides each other, extrudees in transportation or storage process is great, causes the damage to the puck surface easily, destroys the integrality of puck.

However, in the prior art, the ice cubes are produced in batches by adopting a water-flowing type ice maker and a spraying type ice maker, the plate-shaped evaporator is continuously contacted with flowing cold water to make ice, the water pump repeatedly sprays water on the tubular evaporator to naturally flow downwards to make ice, both the water-flowing type ice maker and the spraying type ice maker adopt flowing water flow to make ice, air is not easy to freeze in the ice cubes, the density of the made ice cubes is high, the hardness is high, but the ice cubes are separated from the evaporator by heating the evaporator, so that the spherical ice cubes are difficult to make. The traditional mold method adopts static water to make ice, so that the hardness of the prepared spherical ice blocks is low.

Disclosure of Invention

The invention aims to provide ice making equipment and an ice making method thereof, which have the advantage of being capable of making spherical ice blocks with higher hardness.

The technical purpose of the invention is realized by the following technical scheme:

an ice making device and an ice making method thereof comprise a frame and a refrigeration circuit, and are characterized in that: the ice making device comprises an upper hemispherical module used for liquefying and freezing water vapor and a lower hemispherical module used for being matched with the upper hemispherical module to seal and lock water in a spherical cavity in a suspended manner; the upper hemispherical module comprises a first spherical mould used for carrying out heat interaction with a refrigeration loop, a first hemispherical groove used for wrapping water vapor is formed in the surface of the first spherical mould, an air outlet used for exhausting air is formed in the surface of the first hemispherical groove, the lower hemispherical spherical mould comprises a second spherical mould communicated with a feeding assembly, a second hemispherical groove forming a spherical cavity with the first hemispherical groove is formed in the surface of the second spherical mould, and the lower hemispherical mould further comprises a vibration guide plate used for enabling the surface of the second hemispherical groove to generate radiation sound pressure through ultrasonic wave transmission.

By adopting the technical scheme, because the water vapor is obtained by ultrasonic oscillation, the air content in the water vapor is lower. When the water vapor enters the spherical chamber, the water vapor firstly rises due to low density and contacts the low-temperature first hemispherical groove and is liquefied and falls down, and the water vapor is suspended on the radiation sound pressure surface of the second hemispherical groove surface. The liquid water is discharged from the air outlet when the water level rises, and meanwhile, because the water is in a liquid state, the air content of the liquid water is further reduced by the cavitation effect generated inside when the water is in contact with the radiation sound pressure, and the transparency of the spherical ice block is improved. When the spherical cavity is filled with water, the liquid water in the first hemispherical groove can be firstly frozen into ice blocks and block the exhaust port to enable the spherical cavity to be in a sealed state, the water vapor can be continuously input under the action of the sound pressure layer until the liquid water is frozen and then the volume is increased to fill the whole spherical cavity, and the ice blocks are formed under the extrusion of radiation sound pressure, so that the prepared spherical ice blocks are high in density and high in hardness.

Further setting: the refrigeration circuit comprises a compressor used for pressurization and a condenser used for heat dissipation and cooling, and further comprises a capillary tube used for throttling and pressure reduction and an evaporator used for communicating with the upper hemispherical module and used for evaporation refrigeration, wherein the evaporator comprises a thread groove arranged on the surface of the first spherical mold and an evaporation tube which is internally circulated with a refrigerant and is used for evaporation refrigeration by being attached to the thread groove, and the evaporator further comprises an electromagnetic valve used for introducing high-temperature gas in the compressor into the evaporation tube to enable ice blocks to be separated from the first hemispherical groove.

Through adopting above-mentioned technical scheme, compressor, condenser, capillary and evaporimeter can form the refrigeration cycle of basis, and because the existence of thread groove, the increase of the area of contact of evaporating pipe and first spherical mould has accelerated heat exchange rate, through setting up the solenoid valve, make the back at the ice-cube, in usable solenoid valve pours the inside high-temperature gas of compressor into the evaporating pipe, make the ice-cube break away from with first hemisphere groove, the taking out of follow-up ice-cube of being convenient for.

Further setting: the whole vibration guide plate is of a spherical structure matched with the surface of the second spherical mold, the lower hemispherical module further comprises an ultrasonic generator used for outputting ultrasonic signals and an energy converter used for converting electric energy into mechanical vibration, the energy converter is connected with an amplitude transformer used for amplifying amplitude generated by the energy converter, and the upper end of the amplitude transformer is fixedly connected with the vibration guide plate.

Through adopting above-mentioned technical scheme, can realize changing the great ultrasonic oscillation signal of amplitude with the signal of telecommunication conversion that transducer and amplitude transformer sent supersonic generator to pass through spherical structure's vibration guide plate and transmit to second hemisphere groove surface, make second hemisphere groove surface energy form comparatively even ultrasonic wave near sound field, along with the reduction of suspension height, radiation sound pressure sharply rises, can suspend heavier object.

Further setting: the groove face of first hemisphere groove is vertical downwards, the groove face of second hemisphere groove is vertical upwards, lower hemisphere module is still including connecting the feed assembly and filtering the steam after to the inside steam filter opening that sprays of second hemisphere groove again, the injection direction of steam filter opening and the radial contained angle in second hemisphere groove bottom are greater than 30.

Through adopting above-mentioned technical scheme, set up the inside impurity of steam can further be reduced to the steam filter mouth, improve the transparency of ice-cube. Because first hemisphere groove surface liquefaction temperature is less than the liquefaction temperature of follow-up liquid water, consequently, set up steam filter opening and second hemisphere groove bottom radius's contained angle to be greater than 30, even if meet cold liquefaction for liquid water falls into second hemisphere groove surface after, steam filter opening still can be higher than the liquid level of liquid water in the certain time, can continue directly to spray steam towards first hemisphere groove, make more vapor can liquefy by the lower first hemisphere groove of direct contact temperature, thereby reduce the initial temperature after the liquefaction, accelerate the formation of ice-cubes.

Further setting: the feed assembly is including the first water tank that is used for storing the pure water and being used for providing the pure water and making the water pump that first water tank keeps being full of the state to first water tank, first water tank pipe connection has the flow divider valve that is used for the reposition of redundant personnel, flow divider valve pipeline intercommunication steam filter mouth still includes the piezoceramics piece that vibrates the pure water atomization in with the flow divider valve into vapor through electron high frequency.

Through adopting above-mentioned technical scheme, because water can inevitably have impurity such as mineral substance, these impurity can influence the transparency of ice-cube after freezing, through using the pure water, can make the vapor impurity content of making lower. The first water tank is kept full by the water pump, so that the purified water is isolated from the air, and the air content of the purified water is reduced. Can realize carrying out the feed for multiunit upper hemisphere module and lower hemisphere module simultaneously through setting up the flow divider, improve ice-making efficiency. Through utilizing the piezoceramics piece to carry out high frequency resonance for the temperature of the vapor that produces is lower, can carry out quick liquefaction for ice making speed, and can produce a large amount of anions at the atomizing in-process and can realize self-purification, and adopt the piezoceramics piece to atomize more energy-concerving and environment-protective.

Further setting: the feeding assembly further comprises a barometer for feeding back the pressure inside the first spherical mold and the pressure inside the second spherical mold to the piezoelectric ceramic piece, and the barometer is arranged at the position of the connection of the steam filtering port and the pipeline of the flow dividing valve.

Through adopting above-mentioned technical scheme, when liquid water freezes the inflation and blocks up the steam filter, the inside pressure of the pipeline of connecting the steam filter can rise, can give the piezoceramics piece with pressure signal transmission through setting up the barometer and make after the ice making is accomplished, piezoceramics piece auto-power-off stops to continue to produce vapor.

Further setting: the groove face of first hemisphere groove is equipped with the bar line that is used for increasing area of contact, the degree of depth of bar line is not more than 2 mm.

Through adopting above-mentioned technical scheme, set up the bar line and can come indirect heat exchange who accelerates between evaporating pipe and the vapor through the surface area that increases first hemisphere groove, accelerate the preparation of ice-cube, set up the bar line in the same way and can follow-up utilize solenoid valve heat conduction deicing in-process, melt the puck surface with higher speed, make puck and first hemisphere groove surface break away from. The degree of depth of bar line is not more than 2mm, can avoid making the ice-cube surface of making and making not smooth enough in the deicing in-process because the bar line is too dark, influences pleasing to the eye.

Further setting: the first spherical mould and the second spherical mould are connected through a hinge, the ice making device further comprises a rotating shaft which enables the second spherical mould to be separated from the second spherical mould through overturning, and a hydrophobic layer for dewatering is arranged on the surface of the second hemispherical groove.

Through adopting above-mentioned technical scheme, because second hemisphere groove surface has set up hydrophobic layer for the ice-cube that the vapor liquefaction solidifies the formation is not strong with the adsorptivity on second hemisphere groove surface. And the second spherical mould is driven to overturn through the rotating shaft, so that the second hemispherical groove can be separated from the spherical ice block in a sliding manner, the manner that the ice block is separated from the mould by lifting action in the prior art is changed, and the surface of the separated ice block is relatively complete and smooth.

Further setting: the feeding assembly further comprises a return pipe used for receiving air and enabling water vapor in the air to be condensed and returned, the return pipe is integrally in a threaded pipe shape, a pipeline at one end of the return pipe is connected with the steam outlet, a pipeline at the other end of the return pipe is communicated with a filter used for filtering, and the filter is connected with a second water tank used for storing and recovering the water vapor.

Through adopting above-mentioned technical scheme, because when contacting first hemisphere groove surface, have partial vapor to come too late liquefaction and continue to rise and follow the air and pass through the gas vent, through setting up the back flow, can carry out the secondary condensation to the vapor of fleing away, make it flow back to the spherical intracavity that first hemisphere groove and second hemisphere groove are constituteed, set up filter and second water tank, the vapor that can escape once more after the secondary condensation filters the recovery, improves the utilization ratio of water resource.

Drawings

Fig. 1 is a schematic configuration diagram of an ice making apparatus and an ice making method thereof;

fig. 2 is an overall schematic view of the ice making device;

fig. 3 is a schematic structural view of an upper hemispherical module;

FIG. 4 is a schematic structural diagram of a lower hemisphere module;

FIG. 5 is a schematic flow chart of an implementation of a method for making ice cubes;

fig. 6 is a flow chart illustrating the steps of a method for making spherical ice cubes.

Reference numerals: 1. a frame; 2. a refrigeration circuit; 21. an evaporator; 211. an evaporation tube; 212. a thread groove; 22. a compressor; 23. a condenser; 24. a capillary tube; 25. an electromagnetic valve; 3. an ice making device; 31. an upper hemispherical module; 311. a first spherical mold; 312. a first hemispherical groove; 313. an exhaust port; 314. strip-shaped lines; 315. a rubber ring; 32. a lower hemisphere module; 321. a second spherical mold; 322. a second hemispherical groove; 323. a vibration guide plate; 324. an ultrasonic generator; 325. a transducer; 326. an amplitude transformer; 327. a steam filtering port; 328. a hydrophobic layer; 33. a motor; 34. a rotating shaft; 4. a supply assembly; 41. a first water tank; 42. a water pump; 43. a flow divider valve; 44. piezoelectric ceramic plates; 45. a barometer; 46. a return pipe; 47. a filter; 48. a second water tank; 5. and (5) storing the refrigerator.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Preferred example 1: referring to fig. 1, an ice making apparatus and an ice making method thereof include a frame 1, a refrigeration circuit 2 for performing refrigeration by vapor compression and a feeding assembly 4 for generating vapor by sealed oscillation are disposed on the frame 1, an ice making device 3 connected to the refrigeration circuit 2 and forming transparent spherical ice blocks by suspending and pressing the vapor in spherical chambers by using radiated sound waves, and an ice storage box 5 for storing the spherical ice blocks.

During operation, refrigeration circuit 2 carries out the heat with ice making device 3 at the steam compression in-process and is mutual, makes ice making device 3 produce local low temperature, and feed subassembly 4 carries vapor to ice making device 3 through sealed oscillation, and the vapor that gets into ice making device 3 is liquefied into liquid water by the cold, and liquid water suspends the extrusion under the radiation acoustic pressure effect that the ultrasonic wave produced, and then receives the freezing transparent spherical ice-cube that condenses into the hardness height.

Referring to fig. 1, the refrigeration circuit 2 includes an evaporator 21 in which a refrigerant flows, a compressor 22 for converting the refrigerant into a high-temperature and high-pressure gas by compression, a pipe at one end of the compressor 22 is connected to the evaporator 21, and a pipe at the other end is connected to a condenser 23 for dissipating heat and reducing temperature, and further includes a capillary tube 24 for throttling and reducing pressure, and an electromagnetic valve 25 for introducing the high-temperature gas inside the compressor 22 into an evaporation tube 211 to melt the surface of ice cubes. Referring to fig. 1 and 2, the evaporator 21 includes a screw groove 212 provided on a surface of the ice-making device 3 and an evaporation pipe 211 spirally wound in the screw groove 212.

When the compressor works, the compressor 22 is started, refrigerant in a low-temperature and low-pressure gas state in the evaporation tube 211 enters the compressor 22 and is compressed into high-temperature and high-pressure steam, the condenser 23 receives the high-temperature and high-pressure steam and carries out heat dissipation and cooling on the high-temperature and high-pressure steam to enable the high-temperature and high-pressure steam to become low-temperature and high-pressure gas, then the low-temperature and high-pressure gas enters the capillary tube 24 to be throttled and decompressed and converted into low-temperature and low-pressure gas-liquid two-phase objects, the gas-liquid two-phase objects flow through the evaporation tube 211 under the action of the compressor 22, the gas is converted into low-temperature and low-pressure gas again through heat interaction with the ice making device 3 in the flowing process, and then the gas enters the compressor 22 to repeat the cycle.

Referring to fig. 1, the ice making device 3 includes an upper hemisphere module 31 fixedly connected to the refrigeration circuit 2 and configured to liquefy and freeze water vapor, a lower hemisphere module 32 connected to the feeding assembly 4 and configured to cooperate with the upper hemisphere module 31 to generate a radiation sound pressure to suspend and seal water in the spherical chamber, and a rotation shaft 34 fixedly connected to the lower hemisphere module 32 and configured to turn over the lower hemisphere module 32 under the driving of a motor 33.

During operation, pivot 34 drives lower hemisphere module 32 and laminates upper hemisphere module 31 under motor 33's drive earlier, lower hemisphere module 32 and upper hemisphere module 31 form inclosed spherical cavity, feed subassembly 4 carries vapor to spherical cavity through lower hemisphere module 32, vapor rises to contact upper hemisphere module 31 and receives the cold liquefaction to liquid water, lower hemisphere module 32 produces the radiated sound pressure at spherical cavity's lower surface through the ultrasonic wave, the liquid water of whereabouts suspends the lower surface at spherical cavity and fills up whole spherical cavity gradually under the effect of radiated sound pressure, finally frozen to spherical ice-cube, spherical ice-cube finishes freezing, pivot 34 drives lower hemisphere module 32 and breaks away from upper hemisphere module 31.

Referring to fig. 3, the upper hemispherical module 31 includes a first spherical mold 311 for thermal interaction with the refrigeration circuit 2, a first hemispherical groove 312 for packing water vapor is provided on a surface of the first spherical mold 311, an exhaust port 313 for exhausting air and a bar-shaped ridge 314 for increasing a contact area are provided on a surface of the first hemispherical groove 312, and a rubber ring 315 for sealing by compression is provided on an outer contour of the first hemispherical groove 312.

Referring to fig. 4, the lower hemispherical module 32 includes a second spherical mold 321 connected to the feeding assembly 4 and hinged to the first spherical mold 311, a second hemispherical groove 322 for forming a spherical cavity with the first hemispherical groove 312 is disposed on a surface of the second spherical mold 321, a vibration guide plate 323 adapted to an outer surface of the second spherical mold 321 is disposed on an opposite surface of the second hemispherical groove 322 of the second spherical mold 321, an ultrasonic generator 324 for outputting an ultrasonic signal and a transducer 325 for converting an electric energy into a mechanical vibration, the transducer 325 is fixedly connected below the vibration guide plate 323, a horn 326 for amplifying an amplitude generated by the transducer 325 is disposed between the transducer 325 and the vibration guide plate 323, and a steam filter 327 is disposed on an outer surface of the second spherical mold 321, the steam filter is connected to the feeding assembly 4 through a pipeline, and filters steam and sprays the filtered steam into the second hemispherical groove 322. In this embodiment, an included angle between the spraying direction of the steam filtering port 327 and the bottom radius of the second hemispherical groove 322 is greater than 30 °, a hydrophobic layer 328 for water repellency is disposed on the inner surface of the second hemispherical groove 322, and the depth of the strip-shaped texture 314 is not greater than 2 mm.

During operation, the rotating shaft 34 is driven by the motor 33 to drive the second spherical mold 321 to fit the first spherical mold 311, and the first hemispherical groove 312 and the second hemispherical groove 322 fit to form a closed spherical cavity. The ultrasonic generator 324 transmits a sinusoidal electric signal to the transducer 325, the transducer 325 converts the sinusoidal electric signal into ultrasonic mechanical vibration, when the mechanical vibration generated by the transducer 325 passes through the amplitude transformer 326, the amplitude of the mechanical vibration is increased, and the mechanical vibration is transmitted to the surface of the second hemispherical groove 322 through the vibration guide plate 323, and radiation sound pressure of suspendable substances is formed on the surface of the second hemispherical groove 322; the water vapor provided by the feeding component 4 enters the spherical cavity through the steam filter 327, the water vapor is liquefied into liquid water by contacting the surface of the first spherical cavity 312 with lower temperature due to lower density, the liquid water falls and suspends on the surface of the radiation sound pressure, the liquid water discharges the air above the water level from the air outlet 313 in the process of rising the water level, the liquid water is frozen into transparent spherical ice blocks with higher density under the extrusion of the radiation sound pressure after filling the whole spherical cavity, then the rotating shaft 34 drives the second spherical mold 321 to separate from the first spherical mold 311, the electromagnetic valve 25 is opened, the high-temperature gas inside the compressor 22 enters the evaporation pipe 211, the contact surface of the spherical ice blocks and the first spherical cavity 312 is melted, and the spherical ice blocks fall into the refrigerator 5, thereby completing the preparation of the transparent spherical ice blocks.

Referring to fig. 1, the supply assembly 4 includes a first water tank 41 for storing purified water, a water pump 42 for supplying purified water to the first water tank 41 and keeping the first water tank 41 in a full state, a diverting valve 43 for diverting and supplying purified water to the ice making device 3, a first end of the diverting valve 43 being connected to the first water tank 41, a second end of the diverting valve 43 being connected to a steam filter 327, a piezoelectric ceramic plate 44 for atomizing purified water in the diverting valve 43 into steam by electronic high frequency oscillation and a barometer 45 for feeding back internal pressures of the first spherical mold 311 and the second spherical mold 321 to the piezoelectric ceramic plate 44 are connected between the diverting valve 43 and the steam filter 327 via pipes, a return pipe 46 for receiving air and condensing and returning steam separated from the spherical chambers, the return pipe 46 being in a screw-pipe shape as a whole, the return pipe 46 having an opening connected to a gas discharge port 313, and a second opening connected to a filter 47 for filtering air and residual steam, a second water tank 48 is also included which is piped to the filter 47 and serves to store the recovered water vapour.

During operation, water pump 42 carries the inside pure water of first water tank 41 to flow divider 43, flow divider 43 shunts the pure water, piezoceramics piece 44 produces high frequency vibration and makes the interior pure water gasification of pipeline become vapor, vapor passes through steam filter 327 and gets into in each spherical cavity, the vapor that gets into spherical cavity mostly meets cold liquefaction and solidifies to the ice-cube, a small amount can follow the air and pass through gas vent 313 and discharge back flow 46, the vapor that gets into back flow 46 can carry out the secondary condensation and flow back to spherical cavity at the in-process that flows through back flow 46, a small amount of vapor that does not have the backward flow can further get into second water tank 48 through filter 47 and accomplish the recovery.

Referring to fig. 5 and 6, the present invention also provides an ice making method for making spherical ice cubes using the above ice making apparatus, the ice making method comprising the steps of:

step S1: atomizing, namely transmitting high-frequency oscillation to the first water tank 41 of the feeding assembly 4 by using a piezoelectric ceramic piece 44, and atomizing raw materials for manufacturing ice balls in the first water tank 41 into steam;

step S2: injecting, namely injecting steam obtained by atomization into a spherical cavity formed by the upper hemispherical module 31 and the lower hemispherical module 32 from bottom to top;

step S3: liquefying and precooling, namely fixedly connecting the upper end of the spherical cavity with a refrigeration loop 2, and carrying out heat interaction on the refrigeration loop 2 and the spherical cavity to liquefy and precool the steam entering the spherical cavity into liquid water;

step S4: suspension cavitation, namely transmitting ultrasonic oscillation to a spherical cavity by using an energy transducer 325, manufacturing radiation sound pressure on the inner wall of the spherical cavity, carrying out suspension lifting on liquefied liquid water, and simultaneously enabling the inside of the liquid water to generate a cavitation effect, wherein the thickness of the radiation sound pressure is controlled between 500 micrometers and 800 micrometers;

step S5: exhausting, namely continuously exhausting steam, raising the water level of liquid water, and exhausting air in the spherical cavity from an exhaust port 313 of the upper hemispherical module 31 when the liquid water rises;

step S6: extruding and freezing, namely amplifying the ultrasonic transducer 325 by increasing the voltage at two ends of the amplitude transformer 326 when the liquid water reaches 90% of the capacity of the spherical cavity, and extruding the liquid water by the amplified radiation sound pressure until the liquid water is completely frozen;

step S7: and (3) deicing, namely, turning over the lower hemispherical module 32 to expose the lower surface of the spherical ice block, then pouring high-temperature gas in the compressor 22 into the evaporator 21 through the electromagnetic valve 25, melting the contact surface of the spherical ice block and the upper hemispherical module 31, and enabling the spherical ice block to be separated from the upper hemispherical module 31 and enter the refrigerator 5 to finish the preparation of the spherical ice block.

The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but only protected by the patent laws within the scope of the claims.