Layered ice body preparation method and device

Abstract

The invention relates to the technical field of ice making, and discloses a layered ice body preparation method and device.The layered ice body preparation method is completed through the layered ice body preparation device, the layered ice body preparation device comprises a freezing chamber and a refrigerating unit, and the layered ice body preparation method comprises the following steps that the layered height h of ice body preparation is determined according to the gas content of a needed ice body, the water consumption of each layer of ice body is determined, and the total height H of the ice body is set; the refrigeration unit is started, the refrigeration power is constant, and the temperature of the refrigeration face of the refrigeration unit is stabilized at the set temperature T0; uniformly spraying water required by a first layer of ice or directly injecting the first layer of ice into the freezing chamber; after water spraying, the temperature of the refrigeration surface rises, and when the temperature of the refrigeration surface is reduced to T0, the ice layer is completely frozen; uniformly spraying the required water amount of the second layer of ice into the freezing chamber; and S4 and S5 are circulated until the height of the ice body reaches H. The gas content of the ice body is regulated and controlled by regulating and controlling the thickness of each layer of ice body, and the local gas content of the ice body is controlled.

Description

Technical Field

[0001] The invention relates to the technical field of ice making, and in particular to a method and a device for preparing layered ice. Background Art

[0002] In various occasions where ice is needed, such as food preservation, scientific research, sports competition, etc., there are extremely high requirements for the quality of ice. The physical and chemical properties of ice with different gas contents are also quite different. High-quality ice usually means lower gas content, higher purity and more stable physical properties. Therefore, how to control the gas content of ice has become an important research direction in ice-making technology. When the temperature in the freezing space gradually decreases, water molecules begin to gradually solidify into ice. In this process, if the freezing speed is fast enough and the conditions are properly controlled, the gas and impurities in the water molecules will not have time to escape and will be frozen in the ice body.

[0003] The existing ice making technology mainly controls the freezing rate or the temperature, pressure and humidity in the freezing space to control the gas content and internal structure of ice. For example, by arranging the freezing space in a stepped manner, the same piece of ice is frozen in steps, so that the ice produced by the device can be purer and have fewer bubbles inside.

[0004] However, existing ice-making technologies for controlling the gas content in ice usually require the use of special ice-making equipment and processes, which can only control the gas content of the entire ice body, but cannot control the local gas content of the ice body, resulting in uneven gas distribution in the ice body. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a method and device for preparing a layered ice body.

[0006] The present invention provides a method and device for preparing stratified ice, which is completed by using a stratified ice preparation device. The stratified ice preparation device comprises a freezing chamber and a refrigeration unit arranged in the freezing chamber, wherein the refrigeration unit has a refrigeration surface, and the edge of the refrigeration surface is in contact with the inner wall of the freezing chamber. The method comprises the following steps:

[0007] S1: Determine the layer height h of the ice body according to the required gas content of the ice body, determine the water consumption of each layer of the ice body, and set the total height H of the ice body;

[0008] S2: Turn on the refrigeration unit, keep the refrigeration power constant, and wait until the refrigeration surface temperature of the refrigeration unit stabilizes at the set temperature T0;

[0009] S3: Evenly spraying or directly injecting the amount of water required for the first layer of ice into the freezing chamber;

[0010] S4: After water is sprayed, the temperature of the cooling surface rises. When the temperature of the cooling surface drops to T0, the ice layer is completely frozen;

[0011] S5: spraying the amount of water required for the second layer of ice evenly into the freezing chamber;

[0012] S6: Repeat S4 and S5 until the height of the ice body reaches H.

[0013] Optionally, the gas content of the ice body can be changed by changing the thickness of ice made in a single time. The relationship between the gas content of the ice body and the thickness of ice made in a single time is as follows:

[0014] γ=-1.55×10 -5 h 2 +9.50×10 -4 h+1.21×10 -3

[0015] Among them, γ is the gas content of the ice body; h is the thickness of a single layer of ice.

[0016] Optionally, the gas content of the ice body is obtained according to the physical property parameters of the ice body, the physical property parameters include transparency or hardness, and the relationship between the transparency or hardness of the ice body and the gas content is as follows:

[0017] C=141.91γ 2 -932.26γ+0.73

[0018] d = 32772γ 2 -1196.5γ+32.2

[0019] Among them, C is the transparency of the ice body; d is the hardness of the ice body; γ is the gas content of the ice body.

[0020] Optionally, the refrigeration unit refrigeration surface temperature is stable at the set temperature T0, which means that the refrigeration surface temperature fluctuates by less than 0.2°C within one minute, wherein at the set temperature T0, the water in the freezer can be frozen.

[0021] The embodiment of the present invention further provides a stratified ice preparation device applied to the stratified ice preparation method, comprising:

[0022] Freezer;

[0023] A refrigeration unit is arranged in the freezing chamber, the refrigeration unit has a refrigeration surface, and the edge of the refrigeration surface is in contact with the inner wall of the freezing chamber;

[0024] Insulation material, pasted on the inner wall and / or outer wall of the freezing chamber;

[0025] A refrigeration surface temperature sensor, used to monitor the temperature of the refrigeration unit;

[0026] A water storage module is used to supply water to the freezing chamber.

[0027] Optionally, the stratified ice-making device further includes:

[0028] The controller is electrically connected to the refrigeration unit, the refrigeration surface temperature sensor, and the water storage module, and is at least used to control the refrigeration temperature of the refrigeration unit through the monitoring data of the refrigeration surface temperature sensor, and control the water supply from the water storage module to the freezer chamber.

[0029] Optionally, a water spray device is provided in the top opening of the freezing chamber, and the water spray device comprises a plurality of water spray ports which are spaced apart and evenly arranged.

[0030] Optionally, the freezing chamber is made of metal material or non-metal material, and when the freezing chamber is made of metal material, the inner wall and outer wall of the freezing chamber are both pasted with the thermal insulation material.

[0031] Optionally, a water pump is provided in the water storage module, the water pump is connected to the water spraying device, and a solenoid valve and a flow meter are provided between the water pump and the water spraying device.

[0032] Optionally, the stratified ice-making device further includes:

[0033] The ice layer height monitoring module is arranged in the freezing chamber and is used to monitor the thickness of the ice layer.

[0034] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0035] A method and device for preparing layered ice provided by an embodiment of the present invention achieves ice preparation by inputting a certain amount of water into a freezing chamber in batches, and a refrigeration unit provides cold energy to the freezing chamber. The height of the ice layer is determined according to the gas content or physical property parameters of the required ice body, and then an ice body with the required gas content is obtained. Therefore, the thickness of each layer of ice can be regulated by controlling the amount of water supplied to the freezing chamber, and the local gas content in the ice can be regulated by changing the height of the freezing in batches, thereby achieving the regulation of the transparency, hardness and other physical properties of the ice body, thereby achieving the control of the local physical properties of the ice body. In addition, the problem of difficulty in controlling the freezing rate can be avoided, and the ice making time is shortened. The method for preparing layered ice provided by an embodiment of the present invention can not only prepare transparent ice, but also prepare bubble ice with different overall gas contents or bubble ice with different local gas contents. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic structural diagram of a stratified ice preparation device provided in an embodiment of the present invention.

[0037] Figure 2The present invention provides a flowchart of a method for preparing a layered ice body according to an embodiment of the present invention.

[0038] Figure 3 Schematic diagram of the gas content control curve of the ice body.

[0039] Figure 4 Schematic diagram of the transparency and hardness control curve of ice body.

[0040] Figure 5 A schematic structural diagram of a stratified ice preparation device provided in an embodiment of the present invention.

[0041] Figure 6 These are photos of ice sample slices under different working conditions.

[0042] Figure 7 Schematic diagram of the gas content control curve under different ice thickness.

[0043] Figure 8 Schematic diagram of transparency and hardness control curves under different ice thicknesses.

[0044] Description of reference numerals:

[0045] 1. Insulation material; 2. Refrigeration unit; 3. Freezer; 4. Refrigeration surface temperature sensor; 5. Water storage module; 6. Controller; 601. Temperature signal line; 602. Inlet signal line; 603. Outlet signal line; 604. Pump signal line; 605. Flow signal line; 606. Valve signal line; 7. Water spray device; 8. Inlet temperature sensor; 9. Outlet temperature sensor; 10. Water pump; 11. Flow meter; 12. Solenoid valve; 13. Low-temperature constant temperature water bath. DETAILED DESCRIPTION

[0046] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0047] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] The physical and chemical properties of ice with different gas contents also vary greatly. High-quality ice usually means lower gas content, higher purity and more stable physical properties. Therefore, how to control the gas content of ice has become an important research direction in ice-making technology. When the temperature in the freezing space gradually decreases, water molecules begin to gradually solidify into ice. In this process, if the freezing speed is fast enough and the conditions are properly controlled, the gas and impurities in the water molecules will not have time to escape and will be frozen in the ice.

[0049] The existing ice making technology mainly controls the freezing rate or the temperature, pressure and humidity in the freezing space to control the gas content and internal structure of ice. For example, by arranging the freezing space in a stepped manner, the same piece of ice is frozen in steps, so that the ice produced by the device can be purer and have fewer bubbles inside.

[0050] However, in the existing ice-making technology for controlling the gas content in ice, special ice-making equipment and processes are usually required, such as vacuum ice-making, ultrasonic degassing, etc. These equipment are complex and difficult to operate, with high equipment investment costs and require regular maintenance and upkeep, which increases operating costs; during the ice-making process, due to different cooling rates and freezing conditions, the distribution of gas in the ice may be uneven, resulting in differences in the transparency and hardness of the ice, affecting the quality of the ice; usually, the gas content of the entire ice body is controlled, and the gas content of the local ice body cannot be controlled.

[0051] To this end, an embodiment of the present invention provides a method and device for preparing a layered ice body, which can adjust the gas content in the ice and the physical properties of the ice, such as transparency and hardness, by changing the height of each freezing. There is no need for too many additional devices. The device has a simple structure and low cost, and can achieve control of the local physical properties of the ice body.

[0052] At least one embodiment of the present invention provides a stratified ice preparation method, which is completed by a stratified ice preparation device. The stratified ice preparation device includes a freezing chamber and a refrigeration unit arranged in the freezing chamber. The refrigeration unit has a refrigeration surface, and the edge of the refrigeration surface is in contact with the inner wall of the freezing chamber. The stratified ice preparation method includes the following steps:

[0053] S1: Determine the layer height h of the ice body according to the required gas content of the ice body, determine the water consumption of each layer of the ice body, and set the total height H of the ice body;

[0054] S2: Turn on the refrigeration unit, keep the refrigeration power constant, and wait for the refrigeration surface temperature of the refrigeration unit to stabilize at the set temperature T0;

[0055] S3: Evenly spray or directly inject the amount of water required for the first layer of ice into the freezing chamber;

[0056] S4: After water is sprayed, the temperature of the cooling surface rises. When the temperature of the cooling surface drops to T0, the ice layer is completely frozen;

[0057] S5: spraying the amount of water required for the second layer of ice evenly into the freezing chamber;

[0058] S6: Repeat S4 and S5 until the height of the ice body reaches H.

[0059] In the above-mentioned layered ice preparation method and device provided by the embodiment of the present invention, a certain amount of water is input into the freezing chamber in batches, and the refrigeration unit provides coldness to the freezing chamber to achieve ice preparation. According to the gas content of the required ice body, the height of the ice layer is determined, and then the ice body with the required gas content is obtained. Therefore, the thickness of each layer of ice can be regulated by controlling the amount of water supplied to the freezing chamber, and the local gas content in the ice can be regulated by changing the height of the freezing in batches, and then the transparency, hardness and other physical properties of the ice body can be regulated, thereby achieving control of the local physical properties of the ice body. In addition, the problem of difficulty in controlling the freezing rate can be avoided, and the ice making time is shortened. The layered ice preparation method provided by the embodiment of the present invention can not only prepare transparent ice, but also prepare bubble ice with different overall gas contents or bubble ice with different local gas contents.

[0060] The present invention is described below by several specific embodiments. In order to keep the following description of the embodiments of the present invention clear and concise, the detailed description of known functions and known components may be omitted. When any component of the embodiments of the present invention appears in more than one accompanying drawings, the component may be represented by the same reference numeral in each of the accompanying drawings.

[0061] like Figure 1 As shown, the embodiment of the present invention provides a stratified ice preparation method and device, which is completed by a stratified ice preparation device. The stratified ice preparation device includes a freezing chamber 3 and a refrigeration unit 2 arranged in the freezing chamber 3. The refrigeration unit 2 has a refrigeration surface, and the edge of the refrigeration surface is in contact with the inner wall of the freezing chamber 3. The stratified ice preparation method includes the following steps:

[0062] S1: Determine the layer height h of the ice body according to the required gas content of the ice body, determine the water consumption of each layer of the ice body, and set the total height H of the ice body;

[0063] S2: Turn on refrigeration unit 2, keep the refrigeration power constant, and wait for the refrigeration surface temperature of refrigeration unit 2 to stabilize at the set temperature T0;

[0064] S3: Evenly spray or directly inject the amount of water required for the first layer of ice into the freezing chamber 3;

[0065] S4: After water is sprayed, the temperature of the cooling surface rises. When the temperature of the cooling surface drops to T0, the ice layer is completely frozen;

[0066] S5: spraying the amount of water required for the second layer of ice evenly into the freezing chamber 3;

[0067] S6: Repeat S4 and S5 until the height of the ice body reaches H.

[0068] When making ice, a certain amount of water is input into the freezing chamber 3 in batches, and the refrigeration unit 2 provides coldness to the freezing chamber 3 to prepare ice. The height of the ice layer is determined according to the gas content of the required ice, and then the ice with the required gas content is obtained.

[0069] Specifically, when ice making starts, the height of the ice layer is determined according to the gas content of the required ice body, so as to determine the amount of water required for each layer of ice according to the cross-sectional area of ​​the freezing chamber 3 and the height of the layer, and set the total height of the ice body; then the refrigeration unit is started to reduce the temperature of the refrigeration surface and reach the set temperature T0 required for ice making, and after the refrigeration surface temperature stabilizes at T0, the first layer of ice making water is added into the freezing chamber 3 through a nozzle or manually; after adding water, the temperature of the refrigeration surface will increase, and when the refrigeration surface temperature drops to the set temperature, the first layer of ice is completely frozen, and then the second layer of ice making water is injected and waited for it to freeze, and the cycle is repeated until the overall height of the ice layer reaches H. In the ice making process, the thickness of each layer of ice is regulated by controlling the amount of water supplied to the freezing chamber, and the local gas content in the ice can be regulated by changing the height of the freezing in stages, thereby achieving the regulation of the physical properties of the ice body such as the transparency and hardness, thereby achieving the control of the local physical properties of the ice body.

[0070] It can be understood that as the amount of water sprayed increases, the water layer height becomes larger, and during the freezing process, the gas at the freezing front is more difficult to escape and is frozen in the ice, which results in a higher gas content in the ice body; while during the freezing process, when the water layer height is lower, the gas is more likely to escape into the air, so that the ice body has a lower gas content. At the same time, the stratified ice preparation device and method provided by the present invention can not only prepare transparent ice with a lower gas content, but also prepare bubble ice with different gas contents or bubble ice with different gas contents in parts.

[0071] It should be noted that the refrigeration unit refrigeration surface temperature is stable at the set temperature T0 means that the refrigeration surface temperature fluctuates less than 0.2°C within one minute, wherein at the set temperature T0, the water in the freezing chamber can be frozen. Since the refrigeration unit 2 can adopt a refrigeration method such as a compression refrigeration device, an absorption refrigeration device or a semiconductor refrigeration device, it is sufficient to ensure that the set temperature T0 can achieve the purpose of freezing the water in the freezing chamber 3.

[0072] Furthermore, the gas content of the ice body can be changed by changing the thickness of ice made in a single time. The relationship between the gas content of the ice body and the thickness of ice made in a single time is as follows:

[0073] γ=ah 2 +bh+c

[0074] Wherein, γ is the gas content of the ice body; h is the thickness of a single layer of ice; a, b and c are unknown coefficients. The embodiment of the present invention obtains a, b and c through experimental fitting, thereby obtaining the relationship between the ice body content and the single ice thickness:

[0075] γ=-1.55×10 -5 h 2 +9.50×10 -4 h+1.21×10 -3

[0076] Therefore, the layer height of the ice body can be determined according to the required gas content of the ice body.

[0077] like Figure 3 As shown in FIG. 1 , the relationship between the thickness of a single layer of ice and the gas content of the ice body is that the greater the thickness of the ice body prepared in a single time, the higher the gas content of the ice body.

[0078] The gas content of the ice body is obtained based on the physical parameters of the ice body. The relationship between the physical parameters of the ice body and the gas content is as follows:

[0079] α=f(γ)

[0080] Wherein, α is a physical property parameter of ice body, α is a function of γ, and the physical property parameter includes hardness or transparency, and the physical property parameter may also include density, refractive index, transmittance, stiffness, etc. The embodiment of the present invention obtains the relationship between ice transparency or hardness and gas content through experiments as follows:

[0081] C=141.91γ 2 -932.26γ+0.73

[0082] d = 32772γ 2 -1196.5γ+32.2

[0083] Wherein, C is the transparency of the ice body; d is the hardness of the ice body; and γ is the gas content of the ice body. Therefore, when it is necessary to prepare an ice body with a set transparency or hardness, the gas content of the ice body can be determined according to the transparency or hardness of the ice body, and the layer height of the ice body can be determined using the gas content.

[0084] like Figure 4 As shown in Figure 1, the relationship between the gas content of the ice body and the physical properties of the ice body. The higher the gas content of the ice body, the lower the physical properties of the ice body.

[0085] The embodiment of the present invention further provides a stratified ice preparation device applied to the stratified ice preparation method, and the stratified ice preparation device further includes:

[0086] Freezer;

[0087] A refrigeration unit is arranged in the freezing chamber, and the refrigeration unit has a refrigeration surface, and the edge of the refrigeration surface is in contact with the inner wall of the freezing chamber;

[0088] Insulation material, pasted on the inner wall and / or outer wall of the freezer;

[0089] Refrigeration surface temperature sensor, used to monitor the temperature of the refrigeration unit;

[0090] The water storage module is used to supply water to the freezing chamber.

[0091] Specifically, the freezing chamber 3 can be a square shell structure made of metal material or non-metal material, and the top of the freezing chamber 3 is open or provided with an opening, and the freezing chamber 3 is used to provide a freezing environment for preparing ice bodies. The area of ​​the internal cross section of the freezing chamber 3 is related to the height of the ice layer. Before making ice, the shape and cross-sectional area of ​​the freezing chamber 3 are determined to facilitate the subsequent calculation of the layer height of the ice body. For example, the freezing chamber 3 can be a square shell structure with an open top made of aluminum alloy, stainless steel, ceramic, plastic and other materials. In addition, the shape of the freezing chamber 3 can determine the overall shape of the ice body, and the shape of the freezing chamber 3 can also be other shapes, which can be selected according to actual needs during use, and the present invention does not make any special limitation on this.

[0092] The refrigeration unit 2 can use a compression refrigeration device, an absorption refrigeration device or a semiconductor refrigeration device to cool the freezer chamber 3. The refrigeration unit 2 has a refrigeration surface, and the edge of the refrigeration surface is in contact with the inner wall of the freezer chamber 3, that is, the shape and area of ​​the refrigeration surface are the same as the cross-sectional shape and area of ​​the freezer chamber 3.

[0093] The heat-insulating material 1 can be a material with low thermal conductivity. The heat-insulating material 1 is pasted on the outer wall of the freezing chamber 3 to keep the freezing chamber 3 warm during ice making, so as to prevent the temperature in the freezing chamber 3 from being affected by the outside temperature too quickly. The heat-insulating material 1 can be made of materials with good heat-insulating properties such as heat-insulating cotton and pearl cotton. When the freezing chamber 3 is made of metal material, the heat-insulating material 1 can be pasted on both the inner and outer walls of the freezing chamber 3 to prevent ice from forming on the side walls of the freezing chamber 3, ensure unidirectional freezing of the ice body, and ensure the accuracy of the ice body thickness.

[0094] The refrigeration surface temperature sensor 4 can be a resistance thermometer or a thermocouple temperature sensor, which is used to monitor the temperature of the refrigeration surface in real time, so as to facilitate real-time temperature control. Furthermore, a plurality of refrigeration surface temperature sensors 4 can be arranged in an array on the refrigeration surface to monitor the temperature at different positions of the refrigeration surface, so as to ensure the uniformity of the refrigeration surface temperature, which is conducive to improving the quality of the ice body.

[0095] The water storage module 5 can be made of metal materials such as aluminum alloy, stainless steel, etc., or non-metal materials such as ceramics, plastics, etc.

[0096] In one embodiment of the present invention, the stratified ice preparation device further includes a controller 6. The controller 6 is electrically connected to the refrigeration unit 2, the refrigeration surface temperature sensor 4, and the water storage module 5, and is at least used to control the refrigeration temperature of the refrigeration unit 2 through the detection data of the refrigeration surface temperature sensor 4, and to control the water supply amount of the water storage module 5 to the freezing chamber 3. The controller 6 is used to control the injection of a corresponding amount of water into the freezing chamber 3 according to the required thickness of the ice layer, and to control the refrigeration temperature of the refrigeration unit 2 to always be maintained at the required temperature for ice making according to the monitoring data of the refrigeration surface temperature sensor 4.

[0097] Exemplarily, a water spray device 7 is provided in the top opening of the freezing chamber 3, and the water spray device 7 includes a plurality of water spray ports spaced and evenly arranged, and can evenly spray the water in the water storage module 5 into the freezing chamber 3. In addition, the water spray device 7 may also include a plurality of nozzles, which is not particularly limited in the present invention.

[0098] Furthermore, the stratified ice preparation device also includes an ice layer height monitoring module, which is arranged in the freezing chamber 3 and is used to monitor the overall height of the ice layer in real time.

[0099] Embodiment 1

[0100] In this embodiment, the freezing chamber 3 is made of stainless steel and has a size of 200 mm×200 mm×230 mm.

[0101] The heat-insulating material 1 is pasted on the outside of the freezing chamber 3 for heat preservation, and is also pasted on the four sides of the inside of the freezing chamber 3 to ensure the one-way freezing of the ice body. Square heat-insulating cotton is selected with a thickness of 2 cm.

[0102] The bottom refrigeration unit 2 is welded with the freezing chamber 3 by a stainless steel cold plate, and provides cooling to the refrigeration unit 2 through a low-temperature constant temperature water bath 13. The water storage module 5 uses a plastic water tank to connect the water pump 10, the flow meter 11 and the solenoid valve 12 through pipelines. The size of the plastic water tank is 200mm×200mm×200mm. Among them, the water pump 10 can be a self-priming pump, which is electrically connected to the controller 6 through the pump signal line 604, and the opening and closing of the water pump 10 can be controlled by the controller 6; the flow meter 11 is a volumetric flow meter 11 with high accuracy, which is electrically connected to the controller 6 through the flow signal line 605, and the flow information detected by the flow meter 11 can be transmitted to the controller 6 in real time; the solenoid valve 12 is a direct-acting solenoid valve 12, which is electrically connected to the controller 6 through the valve signal line 606, and the opening and closing of the solenoid valve 12 can be controlled by the controller 6.

[0103] The water spray device 7 is fixed to the top of the freezing chamber 3 by bolts using a stainless steel drainage trough, and is provided with water spray holes for uniformly spraying water into the freezing chamber 3 .

[0104] The refrigeration surface temperature sensor 4 adopts a T-type thermocouple, which is arranged on the refrigeration surface of the refrigeration unit 2 and is electrically connected to the controller 6 through a temperature signal line 601. At the same time, it also includes an inlet temperature sensor 8 connected to the inlet of the low-temperature constant temperature water bath 13 and an outlet temperature sensor 9 at the outlet. The inlet temperature sensor 8 is electrically connected to the controller 6 through an inlet signal line 602, and the outlet temperature sensor 9 is electrically connected to the controller 6 through an outlet signal line 603, which is used to provide power and collect temperature signals.

[0105] This embodiment takes the regulation of the transparency and hardness of ice as an example, and adopts the layered ice preparation method provided by the present invention to analyze the relationship between the thickness of single ice making and the gas content of the ice, and the relationship between the gas content of the ice and the transparency and hardness of the ice.

[0106] like Figure 6 As shown, the refrigeration surface temperature T0 is controlled at 6°C, and the ice body with a height of 30 mm is frozen with ice making thicknesses of 1 mm, 5 mm, 10 mm and 30 mm respectively.

[0107] like Figure 6 As shown in (a), when the ice making height is 1 mm each time, the ice body is almost transparent, the gas content of the ice body is 0.27%, the transparency is 65.7%, and the hardness is 30.3HD.

[0108] like Figure 6 As shown in (b), when the ice making height is 5 mm each time, the bubbles inside the ice body are also distributed in layers, the gas content of the ice body is 0.44%, the transparency is 56.5%, and the hardness is 25.9 HD.

[0109] like Figure 6 As shown in (c), when the ice making height is 10 mm each time, the gas inside the ice body is divided into three layers, the gas content of the ice body is 0.98%, the transparency is 43.6%, and the hardness is 24.4 HD.

[0110] like Figure 6 As shown in (d), when the ice making height is 30 mm each time, the gas content of the ice body is 1.57%, the transparency is 25.3%, and the hardness is 21.3 HD.

[0111] It can be seen from the above experimental results that as the ice making height increases each time, the gas content of the ice increases, the transparency decreases, and the hardness decreases.

[0112] According to the coefficients a, b, and c obtained by experimental fitting in this embodiment, the relationship between the gas content of the ice body and different single ice making thicknesses is:

[0113] γ=-1.55×10 -5 h 2 +9.50×10 -4 h+1.21×10 -3

[0114] Wherein, γ is the gas content of the ice body; h is the thickness of a single layer of ice. Therefore, the layer height of the ice body can be obtained according to the gas content of the ice body.

[0115] The control curve diagram of the gas content of the ice body by changing the thickness of the single layer of ice is as follows Figure 7 shown.

[0116] Furthermore, by changing the single ice making thickness to control the gas content of the ice body, the physical parameters such as the hardness and transparency of the ice body can be further affected. The relationship between the transparency and hardness of the ice body and the gas content is as follows:

[0117] C=141.91γ 2 -32.26γ+0.73

[0118] d = 32772γ 2 -1196.5γ+32.2

[0119] Where C is the transparency of the ice body; d is the hardness of the ice body.

[0120] The hardness and transparency of ice are controlled by adjusting the gas content. Figure 8 shown.

[0121] The above inventions are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A method for preparing stratified ice, using a stratified ice preparation device, the stratified ice preparation device comprising a freezing chamber (3) and a refrigeration unit (2) arranged in the freezing chamber (3), the refrigeration unit (2) having a refrigeration surface, the edge of the refrigeration surface being in contact with the inner wall of the freezing chamber (3), characterized in that: The method for preparing a layered ice body comprises the following steps: S1: Determine the layer height h of the ice body according to the required gas content of the ice body, determine the water consumption of each layer of the ice body, and set the total height H of the ice body; S2: turning on the refrigeration unit (2) and maintaining a constant refrigeration power, and waiting for the refrigeration surface temperature of the refrigeration unit (2) to stabilize at a set temperature T0; S3: evenly spraying or directly injecting the amount of water required for the first layer of ice into the freezing chamber (3); S4: After water is sprayed, the temperature of the cooling surface rises. When the temperature of the cooling surface drops to T0, the ice layer is completely frozen; S5: evenly spraying the amount of water required for the second layer of ice into the freezing chamber (3); S6: Repeat S4 and S5 until the height of the ice body reaches H.

2. The method for preparing a layered ice body according to claim 1, characterized in that: Changing the layer height can change the gas content of the ice body. The relationship between the gas content of the ice body and the layer height is as follows: γ=-1.55×10 -5 h 2 +9.50×10 -4 h+1.21×10 -3 Among them, γ is the gas content of the ice body and h is the layer height.

3. The method for preparing a layered ice body according to claim 2, characterized in that: The gas content of the ice body is obtained based on the physical parameters of the ice body. The physical parameters include transparency or hardness. The relationship between the transparency or hardness of the ice body and the gas content is as follows: C=141.91g 2 -932.26c+0.73 d=32772g 2 -1196.5g+32.2 Among them, C is the transparency of the ice body, d is the hardness of the ice body, and γ is the gas content of the ice body.

4. The method for preparing a layered ice body according to claim 2, characterized in that: The refrigeration surface temperature of the refrigeration unit (2) is stabilized at the set temperature T0, which means that the fluctuation of the refrigeration surface temperature is less than 0.2° C. within one minute, wherein at the set temperature T0, the water in the freezing chamber (3) can be frozen.

5. A stratified ice preparation device applied to the stratified ice preparation method according to claim 1, characterized in that: include: Freezer (3); A refrigeration unit (2) is arranged in the freezing chamber (3); the refrigeration unit (2) has a refrigeration surface, and the edge of the refrigeration surface is in contact with the inner wall of the freezing chamber (3); The heat-insulating material (1) is adhered to the inner wall and / or the outer wall of the freezing chamber (3); A refrigeration surface temperature sensor (4), arranged on the refrigeration surface of the refrigeration unit (2), and used for monitoring the temperature of the refrigeration unit (2); A water storage module (5) is used to supply water to the freezing chamber (3).

6. The stratified ice preparation device according to claim 5, characterized in that: Also includes: A controller (6) is electrically connected to the refrigeration unit (2), the refrigeration surface temperature sensor (4), and the water storage module (5); the controller (6) controls the refrigeration state of the refrigeration unit (2) through the refrigeration surface temperature of the refrigeration unit (2), and controls the amount of water supplied by the water storage module (5) to the freezer chamber (3).

7. The stratified ice preparation device according to claim 5, characterized in that: A water spray device (7) is arranged in the top opening of the freezing chamber (3), and the water spray device (7) comprises a plurality of water spray ports which are spaced apart and evenly arranged.

8. The stratified ice preparation device according to claim 5, characterized in that: The freezing chamber (3) is made of metal material or non-metal material, and when the freezing chamber (3) is made of metal material, the inner wall and the outer wall of the freezing chamber (3) are both pasted with the thermal insulation material (1).

9. The stratified ice preparation device according to claim 7, characterized in that: A water pump is arranged in the water storage module, the water pump is communicated with the water spraying device, and an electromagnetic valve and a flow meter are arranged between the water pump and the water spraying device.

10. The stratified ice preparation device according to claim 5, characterized in that: Also includes: An ice layer height monitoring module is arranged in the freezing chamber (3) and is used to monitor the thickness of the ice layer.

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