CN113030157A - Detection apparatus and system for nucleation of atmospheric ice nucleus - Google Patents
Detection apparatus and system for nucleation of atmospheric ice nucleus Download PDFInfo
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- CN113030157A CN113030157A CN202110268768.7A CN202110268768A CN113030157A CN 113030157 A CN113030157 A CN 113030157A CN 202110268768 A CN202110268768 A CN 202110268768A CN 113030157 A CN113030157 A CN 113030157A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/14—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/14—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation
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- G—PHYSICS
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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Abstract
The invention relates to a detection device and a system for nucleation of atmospheric ice, which comprises: the device comprises a humidity control component, an image acquisition component, a temperature control component and a cooling table; the cold table comprises an upper layer cold table cover, a lower layer cold table cover and a cavity; a transparent glass sheet is arranged on the top of the upper layer cold table cover; a cavity is formed between the upper layer cold table cover and the lower layer cold table cover; the cavity is arranged below the lower layer cold table cover, and a copper table is arranged in the cavity; a hydrophobic silicon wafer for bearing a sample is arranged at the top of the copper platform, and a vent hole is formed in the lower-layer cold platform cover so that the cavity is communicated with the hydrophobic silicon wafer; the humidity control component is connected with the cavity through a connecting piece to regulate the humidity; a first groove is formed in the copper platform, and the temperature control component is arranged in the first groove to adjust the temperature; the image acquisition component is arranged above the transparent glass sheet so as to acquire the picture of the hydrophobic silicon wafer in real time through the transparent glass sheet and the vent hole. The invention can detect the temperature and the relative humidity of the ice crystal formed by the nucleation of the atmospheric particulates as ice nuclei.
Description
Technical Field
The invention relates to the technical field of atmospheric physics observation, in particular to a detection device and a detection system for atmospheric ice nucleation.
Background
Atmospheric ice nucleation refers to particulate matter in the atmosphere that can cause water vapor to desublimate or supercooled water droplets to freeze to form ice crystals. The aerosol particles can be used as ice nuclei to participate in a heterogeneous nucleation process of supercooled liquid drops, and the micro-physics, the service life, the precipitation efficiency and the like of the cloud are influenced and changed, so that the radiation balance and the energy balance of the earth system are influenced, and an indirect effect is generated on the global climate. Therefore, the determination of the nucleation condition of the ice nuclei in the atmosphere can improve the understanding of the cloud micro physical process, deepen the understanding of the indirect climate effect of the aerosol and improve the accuracy of the climate prediction mode.
The formation of ice crystals in the atmosphere is classified into homogeneous nucleation and heterogeneous nucleation. Homogeneous nucleation refers to the direct freezing of homogeneous solution or pure water droplets into ice, which occurs at temperatures below 235K. Heterogeneous nucleation is a process of forming ice crystals triggered by ice nuclei and is divided into ways of desublimation freezing, coagulation freezing, infiltration freezing, contact freezing and the like. Heterogeneous nucleation occurs at higher temperatures and lower relative humidity, and occurs preferentially over homogeneous nucleation.
Currently, measuring instruments for ice core are divided into on-line measurement and off-line measurement. The on-line measurement technology mainly introduces the atmospheric aerosol into a cloud chamber for measurement, and comprises different types of cloud chamber methods and flow tube methods. However, these cloud chambers and flow tubes are bulky, complex in structure, high in cost, incapable of observing the nucleation mode of particulate matter under a continuous cooling condition, and narrow in working temperature range. The off-line measurement technique is to place the collected particles or the suspension formed by elution on a substrate and place the substrate on a cold stage for measurement, and comprises various cold stage methods. The cold platform method device has simple structure and convenient operation, and is a common analysis means for measuring various types of ice nuclei. The existing cooling table device still has the following defects: 1) the cold stage method mainly focuses on measurement in an infiltration freezing mode, and most of the cold stage method cannot realize ice nucleus measurement in a desublimation freezing mode at a lower temperature; 2) the lack of a device for simultaneously and accurately controlling the temperature and the relative humidity in the modes of desublimation freezing and infiltration freezing; 3) the measurement temperature range is narrow, generally higher than 235K.
Disclosure of Invention
The invention mainly aims to overcome the defects in the prior art and provides a detection device and a detection system for the nucleation of the atmospheric ice, which can detect the temperature and the relative humidity of the ice crystals formed by heterogeneous nucleation of atmospheric particles serving as ice nuclei and distinguish the nucleation modes of desublimation freezing and infiltration freezing.
The invention adopts the following technical scheme:
in one aspect, a detection apparatus for nucleation of atmospheric ice comprises: the device comprises a humidity control component, an image acquisition component, a temperature control component and a cooling table; the cold table comprises an upper layer cold table cover, a lower layer cold table cover and a cavity; a transparent glass sheet is arranged on the top of the upper-layer cold table cover; a cavity is formed between the upper layer cold table cover and the lower layer cold table cover; the cavity is arranged below the lower-layer cold table cover, and a copper table is arranged in the cavity; a hydrophobic silicon wafer for bearing a particle sample is arranged on the top of the copper platform, and a vent hole is formed in the lower-layer cold platform cover so that the cavity is communicated with the hydrophobic silicon wafer; the humidity control component is connected with the cavity through a connecting piece to adjust the humidity; a first groove is formed in the copper platform, and the temperature control component is arranged in the first groove to adjust the temperature; the image acquisition component is arranged above the transparent glass sheet so as to acquire the pictures of the hydrophobic silicon wafer in real time through the transparent glass sheet and the vent holes.
Preferably, the humidity control part comprises a first high-purity nitrogen cylinder, a second high-purity nitrogen cylinder, a first mass flow meter, a second mass flow meter, a water storage bottle, a low-temperature constant-temperature tank, a nitrogen gas mixing cylinder and a dew-point instrument; the first high-purity nitrogen cylinder, the first mass flow meter, the water storage bottle and the nitrogen gas mixing bottle are sequentially connected to input humidified nitrogen gas into the nitrogen gas mixing bottle, and the water storage bottle is arranged in the low-temperature constant-temperature tank; the second high-purity nitrogen gas cylinder, the second mass flow meter and the nitrogen gas-mixed cylinder are sequentially connected to input dry nitrogen gas into the nitrogen gas-mixed cylinder; the output of the nitrogen gas mixing bottle is connected to the cavity; the cavity is further connected with the dew point meter through a connecting piece so as to detect the humidity in the cavity.
Preferably, the image acquisition component comprises a CCD industrial camera and a microscope lens which are connected; the microscope lens is aligned with the transparent glass sheet.
Preferably, the temperature control part comprises a liquid nitrogen table, a heating element, a temperature sensor and a temperature controller; the heating element is arranged above the liquid nitrogen platform; the temperature sensor is disposed above the heating element; the temperature controller is respectively connected with the heating element and the temperature sensor; the liquid nitrogen platform is connected with an external liquid nitrogen tank to provide a reference temperature through liquid nitrogen; the temperature controller adjusts the heating element according to the temperature detected by the temperature sensor.
Preferably, the detection apparatus for the nucleation of atmospheric ice further comprises: an O-shaped ring; the O-shaped ring is arranged between the lower-layer cold table cover and the hydrophobic silicon wafer for sealing.
Preferably, the vent hole is funnel-shaped.
Preferably, the connector comprises a teflon tube.
Preferably, the copper platform is further provided with a second groove; the hydrophobic silicon wafer is arranged in the second groove at the top of the copper platform.
Preferably, the upper layer cold stage cover and the lower layer cold stage cover are both made of PEEK composite materials.
In another aspect, a detection system for the nucleation of the atmospheric ice comprises a detection device for the nucleation of the atmospheric ice; the system also comprises external terminal equipment; and the external terminal equipment is respectively connected with the humidity control component, the image acquisition component and the temperature control component so as to acquire the condition of the nucleation of the atmospheric ice nucleus according to the acquired temperature, humidity and corresponding pictures.
As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:
(1) under the combined action of liquid nitrogen and a heating element, the invention enables the cold stage to detect the heterogeneous nucleation mode of the atmospheric ice core within the temperature range of 200K-273K, and particularly can detect the sublimation freezing and infiltration freezing.
(2) The dry and wet nitrogen is mixed in different proportions and introduced into a dew point instrument for measurement, and the relative humidity in the cooling table is accurately controlled and measured.
(3) The method comprises the steps of collecting a picture of a hydrophobic silicon wafer bearing a particle sample in real time through an image collecting component; the external terminal equipment is respectively connected with the humidity control component, the image acquisition component and the temperature control component, the temperature, the relative humidity and the corresponding pictures which are acquired at the same time point are in one-to-one correspondence, different modes (such as infiltration freezing and desublimation freezing) of forming ice crystals by atmospheric ice nuclei are distinguished through picture observation and analysis, and the relative humidity of the surface of the relative ice during icing is obtained by combining the existing calculation mode.
The above description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the description of the technical means more comprehensible.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a block diagram of the structure of the detection device for the nucleation of atmospheric ice according to the present invention;
FIG. 2 is a schematic structural diagram of the detection device for nucleation of atmospheric ice according to the present invention;
FIG. 3 is a schematic diagram of the humidity control component of the present invention;
FIG. 4 is a block diagram of the detection system for nucleation of atmospheric ice in accordance with the present invention;
10, a humidity control component; 101. a first high purity nitrogen gas cylinder; 102. a second high-purity nitrogen gas cylinder; 103. a first mass flow meter; 104. a second mass flow meter; 105. a water storage bottle; 106. a low-temperature constant-temperature tank; 107. a nitrogen gas mixing bottle; 108. a dew point meter; 20. an image acquisition component; 201. a CCD industrial camera; 202. a microscope lens; 30. a temperature control component; 301. a liquid nitrogen table; 302. a heating element; 303. a temperature sensor; 40. cooling; 401. an upper layer cooling platform cover; 402. a lower layer cold table cover; 403. a cavity; 404. a cavity; 405. a copper table; 4051. a first groove; 4052. a second groove; 50. a hydrophobic silicon wafer; 60. a connecting member; 70. an O-shaped ring; 80. and an external terminal device.
Detailed Description
The invention is further described below by means of specific embodiments.
Referring to fig. 1 and 2, the invention relates to a detection device for nucleation of atmospheric ice, comprising: a humidity control part 10, an image acquisition part 20, a temperature control part 30 and a cooling stage 40; the cold stage 40 comprises an upper-layer cold stage cover 401, a lower-layer cold stage cover 402 and a cavity 403; a transparent glass sheet 4011 is arranged at the top of the upper-layer cold stage cover 401; a cavity 404 is formed between the upper-layer cold stage cover 401 and the lower-layer cold stage cover 402; the cavity 403 is arranged below the lower-layer cold stage cover 402, and a copper stage 405 is arranged in the cavity 403; the hydrophobic silicon wafer 50 bearing the particle sample is arranged on the top of the copper platform 405, and the lower-layer cold platform cover 402 is provided with a vent hole 4021 so as to enable the cavity 404 to be communicated with the hydrophobic silicon wafer 50; the humidity control component 10 is connected with the cavity 404 through a connector 60 for humidity adjustment; a first groove 4051 is formed in the copper platform 405, and the temperature control part 30 is arranged in the first groove 4051 to perform temperature adjustment; the image acquisition component 20 is disposed above the transparent glass plate 4011 to acquire pictures of the hydrophobic silicon wafer 50 in real time through the transparent glass plate 4011 and the vent 4021.
In the present embodiment, referring to fig. 3, the humidity control part 10 includes a first high purity nitrogen gas cylinder 101, a second high purity nitrogen gas cylinder 102, a first mass flow meter 103, a second mass flow meter 104, a water storage cylinder 105, a low temperature constant temperature bath 106, a nitrogen gas-mixed cylinder 107, and a dew point meter 108; the first high-purity nitrogen gas cylinder 101, the first mass flow meter 103, the water storage bottle 105 and the nitrogen gas mixing cylinder 107 are sequentially connected to input humidified nitrogen gas into the nitrogen gas mixing cylinder 107, and the water storage bottle 105 is arranged in the low-temperature constant-temperature tank 106; the second high-purity nitrogen gas cylinder 102, the second mass flow meter 104 and the nitrogen gas-mixed cylinder 107 are connected in sequence to input dry nitrogen gas into the nitrogen gas-mixed cylinder 107; the output of the nitrogen gas mixing cylinder 107 is connected to the cavity 404; the cavity 404 is also connected to the dew point meter 108 via a connector 60 to detect the humidity within the cavity 404.
Specifically, the nitrogen gas mixing bottle 107 comprises two input paths and one output path, wherein one input path is connected with the nitrogen gas connected with the water storage bottle 105, the other input path is connected with the dry nitrogen gas, and the other output path is connected with the air inlet of the cooling platform 40 to provide the nitrogen gas with controllable humidity for ice core measurement. The dew point meter 108 is connected to the air outlet of the cold stage 40 for measuring the relative humidity.
Specifically, the connection member 60 includes a Teflon tube (Teflon tube). Namely, one output of the nitrogen gas-mixed bottle 107 is connected with the gas inlet of the cooling platform 40 through a teflon pipe; the air outlet of the cooling table 40 is connected with the dew point instrument 108 through a Teflon pipe. The air inlet and the air outlet of the cooling table 40 may be formed in the top of the upper-layer cooling table cover 401, or may be formed in the side of the upper-layer cooling table cover 401, and are specifically set as required, and this embodiment is not particularly limited.
In this embodiment, the image capturing component 20 includes a CCD industrial camera 201 and a microscope lens 202 connected to each other; the microscope lens 202 is aligned with the transparent glass plate 4011. Specifically, the appearance and size of the recorded particles can be collected by continuously photographing, and the collected images are sent to the external terminal device 80.
In the present embodiment, the temperature control unit 30 includes a liquid nitrogen stage 301, a heating element 302, a temperature sensor 303, and a temperature controller (not shown in the figure); the heating element 302 is arranged above the liquid nitrogen platform 301; the temperature sensor 303 is disposed above the heating element 302; the temperature controller is respectively connected with the heating element 302 and the temperature sensor 303; the liquid nitrogen station 301 is connected with an external liquid nitrogen tank to provide a reference temperature through liquid nitrogen; the temperature controller adjusts the heating element 302 according to the temperature detected by the temperature sensor 303. The temperature controller controls the heating element 302 by setting the temperature increase and decrease rate and the limitation, thereby adjusting the temperature of the cooling stage 40.
Specifically, the heating element 302 includes a heating plate.
Further, the first groove 4051 is disposed right below the hydrophobic silicon wafer 50, so that temperature control and measurement are more accurate.
In this embodiment, the detection apparatus for nucleation of atmospheric ice nucleus further includes: an O-ring 70; the O-ring 70 is disposed between the lower stage cold plate cover 402 and the hydrophobic silicon plate 50 to seal.
In this embodiment, the vent holes 4021 are funnel-shaped with a large top and a small bottom. Such an arrangement enables better diffusion of the airflow.
Preferably, the copper table 405 is further provided with a second groove 4052; the hydrophobic silicon wafer 50 is disposed in a second groove 4052 on top of the copper mesa 405. The second groove 4052 can be a groove. The hydrophobic silicon wafer 50 is disposed in the second groove 4052, so that the hydrophobic silicon wafer 50 can move only in the groove, and the hydrophobic silicon wafer 50 is prevented from falling off from the top of the copper table 405 due to shaking or movement.
In this embodiment, the upper-layer cold stage cover 401 and the lower-layer cold stage cover 402 are both made of PEEK composite materials. The PEEK material is used as a novel semi-crystalline aromatic plastic engineering plastic and has extremely excellent physical and mechanical properties. The PEEK material has good chemical stability and strong corrosion resistance to acid, alkali and almost all organic solvents; the rigidity is high, the dimensional stability is high, and the linear expansion coefficient is small; as a super-hydrophobic material, the surface of the material is not easy to adsorb or gather water vapor.
Further, the detection device further comprises an air floatation vibration isolation optical platform, and the optical platform is arranged at the bottom of the cold stage 40. When the base of the image capturing component 20 is disposed at the bottom of the cold stage 40, the optical platform is disposed below the base of the image capturing component 20. The bottom is provided with the optical platform, so that the focal length of the microscope can be ensured to be constant, and the imaging quality is improved.
The invention adopts an image continuous acquisition mode, sets the image acquisition rate, and uploads the acquired images to the external terminal equipment 80 by using the image acquisition component 20; the real-time temperature of the cooling table 40 is recorded by a temperature recording component, and the real-time relative humidity in the pipeline is recorded by a humidity recording component. According to picture records, if the frozen state is a soaking freezing mode after water absorption, and if the frozen state is a desublimation freezing mode, water vapor directly coagulates on the surface of the particulate matter. And inputting the collected picture and the temperature and humidity record into a data processing part, and judging the temperature and humidity conditions when the first frozen particles are initially frozen or absorb water.
Referring to fig. 4, in another aspect, a detection system for nucleation of atmospheric ice comprises the detection device for nucleation of atmospheric ice; an external terminal device 80; the external terminal device 80 is connected to the humidity control component 10, the image acquisition component 20 and the temperature control component 30 respectively, so as to obtain the conditions of the nucleation of the ice core in the atmosphere according to the acquired temperature, humidity and corresponding pictures.
In this embodiment, the humidity control component 10 includes a dew point meter 108, and the dew point meter 108 includes a humidity sensor, and is capable of uploading the collected relative humidity to the external terminal device 80. The temperature control part 30 includes a temperature sensor 303, and the temperature sensor 303 can upload the collected temperature to the external terminal device 80.
In this embodiment, the external terminal device 80 may be a computer.
The invention adopts an image continuous acquisition mode, sets an image acquisition rate, acquires pictures through an image acquisition part 20 to record the appearance and size of particles, acquires the real-time temperature of a cold stage 40 through a temperature control part 30, simultaneously acquires the relative humidity in the cold stage 40 through a humidity control part 10, and transmits the acquired pictures, the temperature and the relative humidity in the temperature rise and fall process of the cold stage 40 to an external terminal device 80 for processing, so that an ice formation mode and temperature and humidity conditions of ice crystal formation of ice nuclei at initial stage can be obtained, and ice nuclei measurement in a sublimation freezing mode and an infiltration freezing mode can be realized. Specifically, according to picture records, the wetting freezing mode is adopted if the water is frozen after water absorption, and the desublimation freezing mode is adopted if the water vapor is directly condensed on the particle surface. And inputting the collected picture and the temperature and humidity record into a data processing part, and judging the temperature and humidity conditions when the first frozen particles are initially frozen or absorb water.
It should be noted that, the process of analyzing and processing the acquired picture, the temperature change and the humidity change in the process of cooling and warming of the cooling platform by the external terminal device is the prior art, and the detailed description is not given in this embodiment.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (10)
1. A detection apparatus for nucleation of atmospheric ice, comprising: the device comprises a humidity control component, an image acquisition component, a temperature control component and a cooling table; the cold table comprises an upper layer cold table cover, a lower layer cold table cover and a cavity; a transparent glass sheet is arranged on the top of the upper-layer cold table cover; a cavity is formed between the upper layer cold table cover and the lower layer cold table cover; the cavity is arranged below the lower-layer cold table cover, and a copper table is arranged in the cavity; a hydrophobic silicon wafer for bearing a particle sample is arranged on the top of the copper platform, and a vent hole is formed in the lower-layer cold platform cover so that the cavity is communicated with the hydrophobic silicon wafer; the humidity control component is connected with the cavity through a connecting piece to adjust the humidity; a first groove is formed in the copper platform, and the temperature control component is arranged in the first groove to adjust the temperature; the image acquisition component is arranged above the transparent glass sheet so as to acquire the pictures of the hydrophobic silicon wafer in real time through the transparent glass sheet and the vent holes.
2. The detection device for the nucleation of the ice in the atmosphere according to claim 1, wherein the humidity control part comprises a first high-purity nitrogen gas cylinder, a second high-purity nitrogen gas cylinder, a first mass flow meter, a second mass flow meter, a water storage bottle, a low-temperature constant-temperature tank, a nitrogen gas mixing cylinder and a dew-point instrument; the first high-purity nitrogen cylinder, the first mass flow meter, the water storage bottle and the nitrogen gas mixing bottle are sequentially connected to input humidified nitrogen gas into the nitrogen gas mixing bottle, and the water storage bottle is arranged in the low-temperature constant-temperature tank; the second high-purity nitrogen gas cylinder, the second mass flow meter and the nitrogen gas-mixed cylinder are sequentially connected to input dry nitrogen gas into the nitrogen gas-mixed cylinder; the output of the nitrogen gas mixing bottle is connected to the cavity; the cavity is further connected with the dew point meter through a connecting piece so as to detect the relative humidity in the cavity.
3. The detection device for the nucleation of the atmospheric ice according to claim 1, wherein the image acquisition component comprises a CCD industrial camera and a microscope lens which are connected; the microscope lens is aligned with the transparent glass sheet.
4. The detection apparatus for atmospheric ice nucleation according to claim 1, wherein said temperature control means comprises a liquid nitrogen station, a heating element, a temperature sensor and a temperature controller; the heating element is arranged above the liquid nitrogen platform; the temperature sensor is disposed above the heating element; the temperature controller is respectively connected with the heating element and the temperature sensor; the liquid nitrogen platform is connected with an external liquid nitrogen tank to provide a reference temperature through liquid nitrogen; the temperature controller adjusts the heating element according to the temperature detected by the temperature sensor.
5. The apparatus for detecting nucleation of atmospheric ice according to claim 1, further comprising: an O-shaped ring; the O-shaped ring is arranged between the lower-layer cold table cover and the hydrophobic silicon wafer for sealing.
6. The apparatus for detecting nucleation of atmospheric ice according to claim 1, wherein said vent is funnel-shaped.
7. The detection apparatus for atmospheric ice nucleation according to claim 1, wherein said connection comprises a teflon tube.
8. The atmospheric ice nucleation detection apparatus according to claim 1, wherein the copper table is further provided with a second groove; the hydrophobic silicon wafer is arranged in the second groove at the top of the copper platform.
9. The apparatus of claim 1, wherein the upper and lower cold stage covers are both PEEK composite.
10. A detection system for nucleation of atmospheric ice, comprising a detection device for nucleation of atmospheric ice according to any one of claims 1 to 9; the system also comprises external terminal equipment; and the external terminal equipment is respectively connected with the humidity control component, the temperature control component and the image acquisition component so as to acquire the condition of the atmospheric ice nucleation according to the acquired temperature, humidity and corresponding pictures.
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| CN202110268768.7A CN113030157A (en) | 2021-03-12 | 2021-03-12 | Detection apparatus and system for nucleation of atmospheric ice nucleus |
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| CN202110268768.7A CN113030157A (en) | 2021-03-12 | 2021-03-12 | Detection apparatus and system for nucleation of atmospheric ice nucleus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865169A (en) * | 2021-09-08 | 2021-12-31 | 浙江工业大学 | Method and equipment for preparing microcrystalline fluidized ice based on ultrasonic method |
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2021
- 2021-03-12 CN CN202110268768.7A patent/CN113030157A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865169A (en) * | 2021-09-08 | 2021-12-31 | 浙江工业大学 | Method and equipment for preparing microcrystalline fluidized ice based on ultrasonic method |
| CN113865169B (en) * | 2021-09-08 | 2022-07-22 | 浙江工业大学 | Method and equipment for preparing microcrystalline fluidized ice based on ultrasonic method |
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