CN109883097B - Method and apparatus for manufacturing clean transparent ice - Google Patents
Method and apparatus for manufacturing clean transparent ice Download PDFInfo
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- CN109883097B CN109883097B CN201910249376.9A CN201910249376A CN109883097B CN 109883097 B CN109883097 B CN 109883097B CN 201910249376 A CN201910249376 A CN 201910249376A CN 109883097 B CN109883097 B CN 109883097B
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Abstract
A manufacturing method and a manufacturing device of clean transparent ice belong to the field of ice making. The invention solves the problem that the existing ice making technology can not discharge the dissolved air in water in the icing process. The innovation point of the invention is that a replacement dissolved air supersaturation open area is arranged in an ice making container, which comprises the following specific steps: a supersaturation open area is formed from the liquid level in the ice making container to the upper opening of the ice making container, the supersaturation open area is communicated with the outside atmosphere, and the temperature of the supersaturation open area is controlled; selecting a mechanical disturbance mode according to the volume of the ice making container, flushing a crystal interface at a constant flow rate, diluting or replacing a dissolved air supersaturated zone formed by the crystal interface, and simultaneously improving the liquid level temperature of a water body by controlling the temperature of a supersaturated open zone; by controlling the physical conditions in the freezing environment, clean and transparent ice bodies are obtained. The invention discharges the dissolved air and impurities in the water in the icing process, and provides the ice making device which has simple structure and is convenient to use for making clean transparent ice.
Description
Technical Field
The invention relates to a method and a device for manufacturing an ice body, in particular to a method and a device for manufacturing clean transparent ice, belonging to the field of ice making.
Background
The transparent ice is one kind of artificial ice, and is called as clean transparent ice because of the physical environment of crystal growth in the freezing process by human intervention to form a clean transparent ice body. The clean transparent ice has no bubbles, impurities and cracks in the ice body, has uniform density and perfect visual effect, and is widely applied to the commercial fields of catering, entertainment, ice sculpture, gifts and the like.
The existing clean transparent ice manufacturing method comprises the steps that 1, during ice manufacturing, pressurized air is injected into a water body to obtain transparent ice; 2. monitoring TDS (electrolysis) value of the water body, and controlling the transparency degree of ice by controlling the icing speed of the water body; 3. in the ice making process, bubbles generated in the icing process are discharged in a mode of disturbing the water body by a mechanical method. The method for manufacturing the transparent ice uses pure water without impurities as a parent material, and uses the discharged water to dissolve air, and limits the formation of bubbles as a main means for manufacturing the pure transparent ice, and ignores the impurities in the water body and other physical factors influencing the icing process. Therefore, it is difficult to obtain the desired effect of the product in terms of the degree of transparency and the degree of purity. On the other hand, the complicated mechanical structure and the electric control device increase the consumption of materials and energy sources, indirectly improve the manufacturing cost, and ensure that the related ice making technology cannot adapt to the industrialization requirement and is difficult to popularize.
In the process of forming ice by water, whether dissolved air and impurities in water are discharged or not in the process of icing is a main factor influencing the transparency and cleanliness of an ice body.
First, the edge of crystal growth during freezing of water is called the ice peak. The growth of the crystals forms a push of the ice front while displacing dissolved air from the water and, in a short time, a supersaturated zone of dissolved air is formed in the water at the crystal interface (see fig. 10). The supersaturated zone of dissolved air limits the escape of micro-bubbles during subsequent crystal growth. Causing subsequent bubbles to be surrounded by ice peaks, thereby affecting the transparency of the ice. The size of the bubbles in the ice is related to the icing speed, and when the icing speed is more than 3mm/min, the bubbles in the ice look like flocculent coagulations.
Secondly, in the process of ice crystal growth, the structure of water molecules is recombined, impurities in water are rejected, and the water molecules are accumulated in the direction vertical to the advancing direction of an ice peak (see figure 11), so that resistance is formed on the ice crystal growth, and the ice crystal growth speed is reduced. In a natural state without human intervention, a pinnate or linear plaque is formed.
Disclosure of Invention
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.
In view of the above, in order to solve the problems that the existing ice making technology cannot discharge the dissolved air in the water during the freezing process, and the obtained artificial ice is difficult to achieve the expected effect of the product in terms of transparency and purity, a manufacturing method and a manufacturing device of the clean transparent ice are further designed.
The first scheme is as follows: the manufacturing method of the clean transparent ice comprises the following specific steps:
step one, preparation before ice making:
set up the supersaturation open area of replacement dissolved air in the container of making ice, specifically do: a supersaturated open area is formed from the liquid level in the ice making container to the upper opening of the ice making container, the supersaturated open area is communicated with the outside atmosphere, the air pressure in the supersaturated open area is kept constant, and a heating temperature control device is arranged on the heat preservation cover and used for improving the outside environment temperature of the supersaturated open area and reducing the liquid level tension;
step two, an ice making process:
the ice making container starts to make ice under the action of a refrigeration carrier, a mechanical disturbance mode is selected according to the volume of the ice making container, a crystal interface is washed at a constant flow rate, a dissolved air supersaturated zone formed by the crystal interface is diluted or replaced, and meanwhile, the liquid level temperature of a water body is improved by controlling the temperature of a supersaturated open zone; clean and transparent ice is obtained.
Further: in order to further solve the problem that the impurities in water can not be discharged in the icing process by the conventional ice making technology, so that more transparent and pure artificial ice can not be obtained, in the second step, in the later stage of ice making, the surface of a crystal boundary is cleaned, the residual unfrozen water body is replaced by new water, and then the ice continues to be frozen to obtain a clean and transparent ice body.
Further: in the second step, the mechanical disturbance is specifically pump pressure disturbance or blade disturbance.
Further: the pump pressure disturbance is that a water pump is arranged on the inner wall of the ice making container, the water pump washes the crystal interface, and the flow velocity of the water flowing through the crystal interface is 500 mm/S-2000 mm/S; the angle formed by the flow direction of the water body flowing through the crystal interface and the crystal interface is less than or equal to 45 degrees. The maximum washing area is formed on the crystal interface while the flow velocity flowing through the crystal interface is ensured, and the crystal interface can change position along with the increase of the thickness of an ice layer in the ice making process. Therefore, the position, the angle and the flow of the water pump are adjusted in different ice making stages, and the optimal replacement effect is obtained.
Further: the temperature of the refrigeration carrier is-6 ℃ to-18 ℃, the pressure of the water pump is controlled, so that the speed of water flow is controlled, the thickness growth speed of ice in the crystallization process is controlled, and the thickness growth of the ice is not more than 2.5 mm/min. The arrangement is favorable for discharging gas and impurities in water, and the optimal purity and transparency can be obtained.
Further: in the second step, the ice making process is divided into six stages of an initial stage, a middle stage, a later stage, a crystal boundary surface cleaning stage, an icing continuing stage and a finished product obtaining stage; the initial stage is an ice nucleus forming stage, the middle stage is an icing stage, and the later stage is an ice crystal water volume reducing stage; and in the stage of cleaning the surface of the crystal boundary, monitoring the concentration of the soluble solids in the water body before the residual ice, when the concentration of the soluble solids in the water body before the residual ice exceeds 400mg/L, removing the soluble solids near the crystal boundary, taking out the residual unfrozen water, and injecting new water to participate in ice making.
Further: in the ice nucleus forming stage, the flow rate of the water flowing through the crystal interface is 500 mm/S-2000 mm/S, and the temperature of the supersaturation open area is controlled at 5-10 ℃. As the temperature is between 4 ℃ and 9 ℃, the water body begins to form ice nuclei. Therefore, in the initial stage of ice making, the temperature setting of the supersaturation open area is kept between 5 ℃ and 10 ℃, and by the arrangement, the low flow rate and the temperature control promote the formation of ice nuclei, simultaneously reduce the liquid level tension, and smoothly discharge dissolved air after replacement.
Further: in the icing stage, the flow rate of the water flowing through the crystal interface is 2000 mm/S-2000 mm/S, and the temperature of the supersaturation open area is controlled at 9-20 ℃. The saturated open area should be kept in communication with the outside atmosphere, keeping the open area air pressure constant. And (3) washing a crystal interface in a large area to finish the replacement of dissolved air, forming ice nuclei on the side wall and the bottom of the ice making container, and when the internal temperature of the water body is between 0 and 4 ℃, increasing the external environment temperature of a supersaturated open area, reducing the liquid level tension, keeping the liquid level tension within the interval of between 0.073N/m and 0.071N/m, and accelerating the escape of gas.
Further: in the stage of reducing the volume of the ice crystal water and the stage of continuing to freeze, the flow rate of the water flowing through the crystal interface is 2000 mm/S-2000 mm/S, and the temperature of the supersaturation open area is controlled at 9-20 ℃. And (3) washing the crystal interface in a large area to complete the replacement of dissolved air, increasing the external environment temperature of the supersaturated open area, reducing the liquid level tension, keeping the liquid level tension in the interval of 0.073N/m-0.071N/m, and accelerating the escape of gas.
Scheme II: the manufacturing device of the clean transparent ice comprises an ice making container, an insulation box, a heating temperature control device and a water pump, wherein the ice making container is arranged in the insulation box, water is contained in the ice making container, the refrigeration container is refrigerated through an evaporator or a refrigerant, a supersaturation open area is formed from the liquid level of the water in the ice making container to the upper opening of the ice making container, the supersaturation open area is communicated with the outside atmosphere, and the heating temperature control device is arranged on the inner side of a top cover of the insulation box; the water pump has been arranged on the ice making container inner wall, the adjustable installation of water pump is on ice making container, and the water pump is used for scouring the crystal interface, dilutes or replaces the dissolved air supersaturation district that the crystal interface formed.
The invention achieves the following effects:
in order to discharge the dissolved air and impurities in water in the icing process and obtain the artificial ice with ideal purity and transparency, the invention provides a physical environment comprising: 1. displacing the dissolved air supersaturated zone; 2. setting the air temperature of the dissolved air supersaturated open zone; 3. clearing the accumulation of impurities formed in the advancing process of the ice peak and replacing the water body containing high-concentration impurities. Specifically, the method comprises the following steps:
1. displacing the dissolved air supersaturated zone: the micro-bubbles formed in the water at the crystal interface aggregate, i.e. a supersaturated zone of dissolved air. As the freezing process continues to occur, the supersaturated zone of dissolved air limits the movement and escape of the nascent bubbles. It has been found that although the actual thickness of the supersaturated zone is small, for the micro-bubbles formed by the dissolved air, the thread required to pass through the supersaturated zone of dissolved air is too long, so that the probability of the bubbles escaping by virtue of their own buoyancy is small. Notably, after the dissolved air supersaturation zone is formed, a gradient relationship of the dissolved air concentration is formed in the unfrozen water body (see fig. 10). At the moment, if the water body with relatively low dissolved air concentration is used for replacing the water body with supersaturated air concentration, the accumulation of bubbles in the supersaturated area can be effectively eliminated, and obstacles are eliminated for the escape of newly generated bubbles. According to the invention, the supersaturated open area is formed from the liquid level in the ice making container to the upper opening of the ice making container, the supersaturated open area is communicated with the outside atmosphere, the air pressure in the supersaturated open area is kept constant, a mechanical disturbance mode is selected according to the volume of the ice making container, the crystal interface is washed at a constant flow rate, and the dissolved air supersaturated area formed by the crystal interface is diluted or replaced, so that the dissolved air can smoothly escape.
2. Setting of air temperature of the dissolved air supersaturated open zone: the tiny bubbles formed by the propulsion of the ice front will eventually pass through the liquid surface without freezing and escape into the air adjacent to the liquid surface. In this process, the dissolved air supersaturation zone should be kept open (not frozen) and the liquid level through which the bubbles pass should be kept under a low tension. Therefore, the heating temperature control device is arranged on the heat insulation cover, the temperature of the air adjacent to the dissolved air supersaturated open zone is controlled, and the bubbles can successfully escape from the water body by virtue of buoyancy by reducing the tension of the liquid level, so that the aim of reducing the concentration of the dissolved air in the open zone is finally achieved. By the reciprocating circulation, bubbles generated in the ice crystal growth process are continuously replaced by the water body before ice, and a realization mode is provided for replacing the water body with supersaturated concentration by the water body with relatively low dissolved air concentration.
3. Clearing the accumulation of impurities formed during the advancing process of the ice peak and replacing the water body containing high-concentration solid dissolved matters: as shown in FIG. 11, the ice crystal growth is mainly based on two-dimensional propulsion, and during the formation of the ice crystal, impurities in the water body are also pushed by the ice peak and move along with the propulsion of the ice peak in a two-dimensional plane. When the aggregate amount of impurities is too high, the accumulated impurities stay at fixed positions and are covered by growing ice crystals. Therefore, in the process of ice crystal growth, the crystal surface is cleaned, the deposition of impurities is removed, the crystallization speed of ice is improved, and the purity degree of ice is further ensured.
In conclusion, in the ice making process, the dissolved air and impurities in the water are discharged in the icing process, and the transparency and the purity of the obtained artificial ice are further improved. Meanwhile, the invention provides the ice making device which has simple structure and is convenient to use for making clean transparent ice.
Drawings
FIG. 1 is a flowchart of a method of manufacturing clean transparent ice;
FIG. 2 is a schematic view of an ice making apparatus;
FIG. 3 is a schematic representation of the displacement of dissolved air in a supersaturated open zone (early stage);
FIG. 4 is a schematic representation of the displacement of dissolved air in a supersaturated open zone (middle phase);
FIG. 5 is a schematic representation of the displacement of dissolved air in a supersaturated open zone (late);
FIG. 6 is a schematic view of a single water pump arrangement;
FIG. 7 is a schematic view of two water pump arrangements;
FIG. 8 is a schematic view of a multiple water pump arrangement;
FIG. 9 is a schematic view of the angular adjustment of the water pump during displacement of the oversaturation zone;
FIG. 10 is a schematic view showing the formation of a supersaturated zone in a natural state;
FIG. 11 is a graph showing the relationship among the advancing direction of the ice peak, the growth direction of the ice mass, and the deposition direction of impurities.
Detailed Description
In the interest of clarity and conciseness, not all features of an actual implementation are described in the specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the device structures and/or processing steps closely related to the solution according to the present invention are shown in the application document, and other details not closely related to the present invention are omitted.
Example 1: referring to fig. 1 to 11, the method for manufacturing clean transparent ice according to the present embodiment includes the following steps:
step one, preparation before ice making:
set up replacement dissolved air supersaturation open area in the container of making ice, specifically do: a supersaturated open area is formed from the liquid level in the ice making container to the upper opening of the ice making container, the supersaturated open area is communicated with the outside atmosphere, the air pressure in the supersaturated open area is kept constant, and a heating temperature control device is arranged on the heat preservation cover and used for improving the outside environment temperature of the supersaturated open area and reducing the liquid level tension; as shown in fig. 4-6, a heating temperature control device is arranged in the space of the supersaturated open zone to maintain the temperature of the open zone. According to the Clausius-clapeyron equation, the liquid surface temperature is increased from 0 ℃ to 35 ℃, and the concentration of dissolved air is reduced from 14.7ml/L to 7.03 ml/L.
Step two, an ice making process:
the ice making container starts to make ice under the action of a refrigeration carrier, a mechanical disturbance mode is selected according to the volume of the ice making container, the mechanical disturbance is specifically pump pressure disturbance, a crystal interface is flushed at a constant flow rate, a dissolved air supersaturation area formed by the crystal interface is diluted or replaced, and meanwhile, the liquid level temperature of a water body is improved through controlling the temperature of a supersaturation open area; in the later stage of ice making, cleaning the surface of a crystal boundary, replacing the residual unfrozen water body with new water, and then continuously icing to obtain a clean transparent ice body;
the ice making process comprises six stages of an initial stage, a middle stage, a later stage, a crystal boundary surface cleaning stage, a continuous icing stage and a finished product obtaining stage; the initial stage is an ice nucleus forming stage, the middle stage is an icing stage, and the later stage is an ice crystal water volume reducing stage;
in the ice core forming stage, the temperature of a supersaturation open area is controlled to be 5-10 ℃. As the temperature is between 4 ℃ and 9 ℃, the water body begins to form ice nuclei. Therefore, in the initial stage of ice making, the temperature setting of the supersaturation open area is kept between 5 ℃ and 10 ℃;
in the freezing stage, the ice crystal water volume reducing stage and the continuous freezing stage, the temperature of the supersaturated open area is controlled to be 9-20 ℃; the saturated open area should be kept in communication with the outside atmosphere, keeping the open area air pressure constant. Large-area flushing is carried out on a crystal interface to finish replacement of dissolved air, ice nuclei are formed on the side wall and the bottom of an ice making container, and when the internal temperature of a water body is 0-4 ℃, the external environment temperature of a supersaturated open area is increased, the liquid level tension is reduced, the liquid level tension is kept in an interval of 0.073N/m-0.071N/m, and the escape of gas is accelerated;
in the stage of cleaning the surface of the crystal boundary, monitoring the concentration of the soluble solids in the water body before the residual ice, when the concentration of the soluble solids in the water body before the residual ice exceeds 400mg/L, removing the soluble solids near the crystal boundary, taking out the residual unfrozen water, and injecting new water to participate in ice making;
the pump pressure disturbance is that a water pump is arranged on the inner wall of the ice making container and washes a crystal interface; the angle formed by the flow direction of the water flowing through the crystal interface and the crystal interface is less than or equal to 45 degrees; the temperature of the refrigeration carrier is-6 ℃ to-18 ℃, the pressure of the water pump is controlled, so that the speed of water flow is controlled, the thickness growth speed of ice in the crystallization process is controlled, and the thickness growth of the ice is not more than 2.5 mm/min.
In the embodiment, the water body containing dissolved air with different concentrations is replaced in a water body internal circulation mode. At more than 1/6m3In the manufacturing process of the transparent ice with the pure volume, a water pump is selected to complete the replacement process of the interior of the water body. Wherein the scouring speed (flow rate) interval of the water pump to the crystal interface is [500, 2000 ]]mm/S. As shown in fig. 6 to 9, the water pump arrangement principle includes: a, ensuring the flow velocity flowing through the crystal interface; b the largest washing area is formed for the crystal interface (as shown in figure 9); c the angle theta formed by the water flow direction and the crystal interface is less than or equal to 45 degrees. Since the crystal interface changes its position with the increase of the thickness of the ice layer during the freezing process. Therefore, the position, the angle and the flow of the water pump are adjusted in different ice making stages, and the optimal replacement effect is obtained.
Example 2: referring to fig. 2, the apparatus for manufacturing clean transparent ice of the present embodiment specifically includes an ice making container 1, an insulation box 2, a heating temperature control device 4, and a water pump 7, wherein the ice making container 1 is disposed in the insulation box 2, water is contained in the ice making container 1, the refrigeration container is refrigerated by an evaporator or a refrigerant, a supersaturation open region is formed from a liquid level of the water in the ice making container 1 to an upper opening of the ice making container, the supersaturation open region is kept communicated with the outside atmosphere, and the heating temperature control device 4 is disposed on an inner side of a top cover of the insulation box 2; water pump 7 has been arranged on ice making container 1 inner wall, adjustable the installing on ice making container 1 of water pump 7, the water pump is used for scouring the crystal interface, dilutes or replaces the dissolved air supersaturation district that the crystal interface formed.
Although the embodiments of the present invention have been described above, the contents thereof are merely embodiments adopted to facilitate understanding of the technical aspects of the present invention, and are not intended to limit the present invention. It will be apparent to persons skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. The manufacturing method of the clean transparent ice is characterized in that: the method comprises the following specific steps:
step one, preparation before ice making:
set up the supersaturation open area of replacement dissolved air in the container of making ice, specifically do: a supersaturated open area is formed from the liquid level in the ice making container to the upper opening of the ice making container, the supersaturated open area is communicated with the outside atmosphere, the air pressure in the supersaturated open area is kept constant, and a heating temperature control device is arranged on the heat preservation cover and used for improving the outside environment temperature of the supersaturated open area and reducing the liquid level tension;
step two, an ice making process:
the ice making container starts to make ice under the action of a refrigeration carrier, a mechanical disturbance mode is selected according to the volume of the ice making container, a crystal interface is washed at a constant flow rate, a dissolved air supersaturated zone formed by the crystal interface is diluted or replaced, and meanwhile, the liquid level temperature of a water body is improved by controlling the temperature of a supersaturated open zone; obtaining clean transparent ice bodies; the mechanical disturbance is specifically pump pressure disturbance, the pump pressure disturbance is that a water pump is arranged on the inner wall of the ice making container, the water pump washes the crystal interface, and the angle formed by the flow direction of the water flowing through the crystal interface and the crystal interface is less than or equal to 45 degrees.
2. The method of manufacturing clean transparent ice according to claim 1, wherein: and in the second step, cleaning the surface of the crystal boundary in the later stage of ice making, replacing the residual unfrozen water body with new water, and then continuously icing to obtain a clean and transparent ice body.
3. The method of manufacturing clean transparent ice according to claim 2, wherein: the water pump flushes the crystal interface, and the flow rate of the water flowing through the crystal interface is 500 mm/S-2000 mm/S.
4. The method of manufacturing clean transparent ice according to claim 3, wherein: the temperature of the refrigeration carrier is-6 ℃ to-18 ℃, the pressure of the water pump is controlled, so that the speed of water flow is controlled, the thickness growth speed of ice in the crystallization process is controlled, and the thickness growth of the ice is not more than 2.5 mm/min.
5. The method of manufacturing clean transparent ice according to claim 2, 3 or 4, wherein: in the second step, the ice making process is divided into six stages of an initial stage, a middle stage, a later stage, a crystal boundary surface cleaning stage, an icing continuing stage and a finished product obtaining stage; the initial stage is an ice nucleus forming stage, the middle stage is an icing stage, and the later stage is an ice crystal water volume reducing stage; and in the stage of cleaning the surface of the crystal boundary, monitoring the concentration of the soluble solids in the water body before the residual ice, when the concentration of the soluble solids in the water body before the residual ice exceeds 400mg/L, removing the soluble solids near the crystal boundary, taking out the residual unfrozen water, and injecting new water to participate in ice making.
6. The method of manufacturing clean transparent ice according to claim 5, wherein: in the ice nucleus forming stage, the flow rate of the water flowing through the crystal interface is 500 mm/S-2000 mm/S, and the temperature of the supersaturated open area is controlled to be 5-10 ℃; as the temperature is between 4 ℃ and 9 ℃, the water body begins to form ice nuclei; therefore, in the initial stage of ice making, the temperature setting of the supersaturation open area is kept between 5 ℃ and 10 ℃, and by the arrangement, the low flow rate and the temperature control promote the formation of ice nuclei, simultaneously reduce the liquid level tension, and smoothly discharge dissolved air after replacement.
7. The method of manufacturing clean transparent ice according to claim 6, wherein: in the icing stage, the flow rate of the water flowing through the crystal interface is 500 mm/S-2000 mm/S, and the temperature of the supersaturation open area is controlled at 9-20 ℃; the oversaturated open area should be kept in communication with the outside atmosphere to keep the air pressure in the oversaturated open area constant; and (3) washing a crystal interface in a large area to finish the replacement of dissolved air, forming ice nuclei on the side wall and the bottom of the ice making container, and when the internal temperature of the water body is between 0 and 4 ℃, increasing the external environment temperature of a supersaturated open area, reducing the liquid level tension, keeping the liquid level tension within the interval of between 0.073N/m and 0.071N/m, and accelerating the escape of gas.
8. The method of manufacturing clean transparent ice according to claim 7, wherein: in the stage of reducing the volume of the ice crystal water and the stage of continuing to freeze, the flow rate of the water flowing through the crystal interface is 500 mm/S-2000 mm/S, and the temperature of the supersaturation open area is controlled at 9-20 ℃; and (3) washing the crystal interface in a large area to complete the replacement of dissolved air, increasing the external environment temperature of the supersaturated open area, reducing the liquid level tension, keeping the liquid level tension in the interval of 0.073N/m-0.071N/m, and accelerating the escape of gas.
9. The manufacturing installation of clean transparent ice, its characterized in that: the ice making device comprises an ice making container (1), an insulation box (2), a heating temperature control device (4) and a water pump (7), wherein the ice making container (1) is arranged in the insulation box (2), water is contained in the ice making container (1), the refrigeration container is refrigerated through an evaporator or a refrigerant, a supersaturation open area is formed from the liquid level of the water in the ice making container (1) to the upper opening of the ice making container, the supersaturation open area is communicated with the outside atmosphere, and the heating temperature control device (4) is arranged on the inner side of a top cover of the insulation box (2); water pump (7) have been arranged on ice making container (1) inner wall, adjustable the installing on ice making container (1) of water pump (7), the water pump is used for scouring the crystal interface, dilutes or replaces the dissolved air supersaturation district that the crystal interface formed.
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| CN115164463B (en) * | 2022-05-27 | 2023-11-03 | 北京理工大学 | Method for controlling generation of bubbles in ice cubes |
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| JPH05332652A (en) * | 1992-06-02 | 1993-12-14 | Miura Co Ltd | Transparent ice making device |
| JP2001355945A (en) * | 2000-04-10 | 2001-12-26 | Sanyo Electric Co Ltd | Ice plant and freezing refrigerator equipped with this plant |
| US6935124B2 (en) * | 2002-05-30 | 2005-08-30 | Matsushita Electric Industrial Co., Ltd. | Clear ice making apparatus, clear ice making method and refrigerator |
| US9574811B2 (en) * | 2013-10-18 | 2017-02-21 | Rocco Papalia | Transparent ice maker |
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