A fast ice making device and ice particle spraying and rust removal system

Abstract

The present invention provides a rapid ice-making device and an ice particle spraying and derusting system, comprising a supercooled water preparation system, an ice-making system and a control system. The supercooled water preparation system comprises a first liquid nitrogen tank, a cooling circulation pipeline connected to the outlet end of the first liquid nitrogen tank, a heat exchanger and a fan arranged on the cooling circulation pipeline. The ice-making system comprises a first high-pressure gas tank, a first branch pipeline for passing the high-pressure gas in the first high-pressure gas tank into the inner cavity of the heat exchanger, an ice-making bin arranged below the heat exchanger, and a second branch pipeline connecting the first high-pressure gas tank and the ice drop port at the bottom of the ice-making bin, and a coil for generating an external magnetic field in the ice-making bin is provided on the ice-making bin. The device uses a magnetic field to reduce the free energy of supercooled water from a liquid phase to a solid phase, reduce the critical nucleation radius of solute molecules in the solution, and improve the nucleation rate and ice-making efficiency. At the same time, the use of an axial flow fan and an ultrasonic heater can prevent ice particles from adhering and clogging, thereby ensuring the normal operation of the ice particle derusting spray gun.

Description

Technical Field

[0001] The invention relates to the technical field of rust removal and cleaning, in particular to a rapid ice making device and an ice particle spraying rust removal system. Background Art

[0002] Ice making is a technology widely used in refrigeration and freezing. It can convert water or other liquids into solid ice for use in refrigeration, freezing and transportation. At present, the main method of ice making is to reduce the temperature of water to below the freezing point through the circulation of refrigerant, and then convert water into ice by evaporation or sublimation. However, this traditional ice making method has problems such as low efficiency, high energy consumption and environmental damage. In order to solve these problems, some new ice making technologies are being studied and developed. Among them, a widely studied technology is to use supercooled water to make ice. This method takes advantage of the characteristics of supercooled water, that is, supercooled water can form ice particles at temperatures below the freezing point. Compared with traditional ice making methods, supercooled water ice making has the advantages of high ice making efficiency, low energy consumption and environmental protection. However, there are also some problems with supercooled water ice making. One of the problems is that it takes a certain amount of time for supercooled water to form ice particles. Due to the limited volume of the ice making device, supercooled water is easy to adhere to the inner wall of the device, which will affect the ice making efficiency and ice making speed. Therefore, studying how to speed up the nucleation rate of ice particles formed by supercooled water has become one of the important directions of ice making technology research.

[0003] The nozzle of the existing ice particle rust removal spray gun is easily clogged by ice particles, resulting in the nozzle being unable to spray the ice particle water jet normally. When the nozzle is clogged, the rust removal effect will be affected because the blockage will cause the pressure of the ice particle water jet to be unstable and the spraying range to be uneven, and the expected rust removal effect cannot be achieved. At the same time, the blockage will also increase the resistance of the nozzle, so that the spray gun needs a greater pressure to push the ice particles when working, which increases energy consumption and may cause equipment failure. Summary of the invention

[0004] In view of the problems of slow ice particle nucleation speed and easy clogging of the nozzle of the ice particle spray gun in the existing ice particle spray rust removal system, the present invention provides a fast ice making device and an ice particle spray rust removal system. The device uses a magnetic field to reduce the free energy of supercooled water from liquid phase to solid phase, reduce the critical nucleation radius of solute molecules in the solution, and improve the nucleation rate and ice making efficiency. At the same time, the use of axial flow fans and ultrasonic heaters can prevent ice particles from adhering and clogging, ensuring the normal operation of the ice particle spray gun.

[0005] The present invention achieves the above technical objectives through the following technical means.

[0006] A rapid ice-making device is characterized by comprising a supercooled water preparation system, an ice-making system and a control system.

[0007] The supercooled water preparation system comprises a first liquid nitrogen tank, a cooling circulation pipeline connected to the outlet end of the first liquid nitrogen tank, a heat exchanger and a fan arranged on the cooling circulation pipeline; the heat exchanger comprises a shell, a heat transfer pipe arranged in the shell and a water injection port for filling distilled water into the inner cavity of the shell, the inlet and outlet of the heat transfer pipe are connected to the cooling circulation pipeline, and the distilled water in the heat exchanger is made to reach a supercooled state by using the liquid nitrogen flowing into the heat transfer pipe; an ultrasonic suspension device is arranged on the heat exchanger; a first temperature sensor and a second temperature sensor are respectively arranged in the cooling circulation pipeline in the heat exchanger and downstream of the heat exchanger; a temperature control valve is arranged at the outlet end of the first liquid nitrogen tank.

[0008] The ice-making system includes a first high-pressure gas tank, a first branch pipeline for passing the high-pressure gas in the first high-pressure gas tank into the inner cavity of the heat exchanger, an ice-making bin arranged below the heat exchanger, a water supply pipeline having one end connected to a drain outlet at the bottom of the heat exchanger and the other end connected to an atomizing nozzle on the ice-making bin, and a second branch pipeline connecting the first high-pressure gas tank and an ice drop outlet at the bottom of the ice-making bin; the ice-making bin is provided with a coil for generating an external magnetic field in the ice-making bin; the first branch pipeline and the second branch pipeline upstream of the ice drop outlet are respectively provided with a first pressure reducing valve and a second pressure reducing valve; the second branch pipeline between the second pressure reducing valve and the ice drop outlet is provided with a second liquid nitrogen tank for cooling the high-pressure gas flowing downstream; and the water supply pipeline is provided with a safety valve.

[0009] The control system is a computer responsible for controlling the opening and closing of the first pressure reducing valve, the second pressure reducing valve, the safety valve and the temperature control valve.

[0010] Furthermore, the strength of the external magnetic field is 0.2-0.3T.

[0011] Furthermore, a pressure cover is provided on the top of the ice making bin, and the pressure cover is connected to the ice making bin by a flange connection. A through hole is provided on the pressure cover for a water supply pipeline to pass through.

[0012] Furthermore, the ultrasonic suspension device includes an ultrasonic transmitter and a reflector arranged on both sides of the heat exchanger.

[0013] Furthermore, a one-way valve is provided on the cooling circulation pipeline.

[0014] An ice particle spraying and rust removal system for a rapid ice-making device comprising any of the above items is characterized in that it includes a spray gun body, a second high-pressure gas tank, an air intake pipe connecting the inner cavity of the spray gun body and the second high-pressure gas tank, and an air pressure valve and a mixing chamber sequentially arranged on the air intake pipe along the air intake direction; the top of the mixing chamber is connected to a second branch pipeline; an ultrasonic heater is provided on the outlet end of the spray gun body.

[0015] Furthermore, the frequency of the ultrasonic heater is 30-50kHz, and the power is 50-100W.

[0016] Furthermore, an axial flow fan is installed at the outlet end of the air inlet duct, and the axial flow fan includes a wheel hub and a plurality of forward-swept blades.

[0017] Furthermore, the forward-swept blade is coated with a polyurethane coating for preventing ice particles from adhering.

[0018] The beneficial effects of the present invention are as follows:

[0019] The present invention utilizes the effect of a magnetic field to reduce the free energy of supercooled water from a liquid phase to a solid phase, thereby reducing the radius of a critical crystal nucleus formed. The increase in the diffusion coefficient of the water system and the decrease in the viscosity coefficient make the solute molecules in the solution move more freely and have a larger range of activity, increasing the chances of solute molecules colliding and combining, thereby increasing the nucleation rate and the crystal growth rate, which is more conducive to crystallization. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the rapid ice-making device of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the ice particle spraying rust removal system of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the axial flow fan described in the present invention.

[0023] The reference numerals are as follows:

[0024] 1-first liquid nitrogen tank; 2-cooling circulation pipeline; 3-heat exchanger; 4-fan; 5-water inlet; 6-first temperature sensor; 7-second temperature sensor; 8-temperature control valve; 9-first high-pressure gas tank; 10-first branch pipeline; 11-ice making bin; 12-atomizing nozzle; 13-water pipeline; 14-second branch pipeline; 15-coil; 16-first pressure reducing valve; 17-second pressure reducing valve; 18-second liquid nitrogen tank; 19-safety valve; 20-pressure cover; 21-ultrasonic transmitter; 22-reflector; 23-check valve; 24-spray gun body; 25-second high-pressure gas tank; 26-air inlet pipe; 27-pressure valve; 28-mixing bin; 29-ultrasonic heater; 30-forward swept blade. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0026] The rapid ice-making device described in this embodiment includes a supercooled water preparation system, an ice-making system and a control system.

[0027] The supercooled water preparation system includes a first liquid nitrogen tank 1, a cooling circulation pipeline 2 connected to the outlet end of the first liquid nitrogen tank 1, a heat exchanger 3 and a fan 4 arranged on the cooling circulation pipeline 2. The heat exchanger 3 includes a shell, a heat transfer pipe arranged in the shell, and a water injection port 5 for filling distilled water into the inner cavity of the shell. The inlet and outlet of the heat transfer pipe are connected to the cooling circulation pipeline 2, and the distilled water in the heat exchanger 3 is supercooled by the liquid nitrogen flowing into the heat transfer pipe. An ultrasonic transmitter 21 and a reflector 22 are respectively arranged on both sides of the heat exchanger 3. A first temperature sensor 6 and a second temperature sensor 7 are respectively arranged in the cooling circulation pipeline 2 in the heat exchanger 3 and downstream of the heat exchanger 3. A temperature control valve 8 is provided at the outlet end of the first liquid nitrogen tank 1, and a one-way valve 23 is provided on the cooling circulation pipeline 2.

[0028] The ice making system includes a first high-pressure gas tank 9, a first branch pipeline 10 for passing the high-pressure gas in the first high-pressure gas tank 9 into the inner cavity of the heat exchanger 3, an ice making bin 11 arranged below the heat exchanger 3, a water delivery pipeline 13 having one end connected to the drain outlet at the bottom of the heat exchanger 3 and the other end connected to the atomizing nozzle 12 on the ice making bin 11, and a second branch pipeline 14 connecting the first high-pressure gas tank 9 and the ice drop outlet at the bottom of the ice making bin 11. The ice making bin 11 is provided with a coil 15 for generating an external magnetic field of 0.25T in the ice making bin 11. The first branch pipeline 10 and the second branch pipeline 14 upstream of the ice drop outlet are respectively provided with a first pressure reducing valve 16 and a second pressure reducing valve 17. The second branch pipeline 14 between the second pressure reducing valve 17 and the ice drop outlet is provided with a second liquid nitrogen tank 18 for cooling the high-pressure gas flowing downstream; the water delivery pipeline 13 is provided with a safety valve 19.

[0029] The control system is a computer (not shown in the figure) responsible for controlling the opening and closing of the first pressure reducing valve 16, the second pressure reducing valve 17, the safety valve 19 and the temperature control valve 8. Figure 1 Schematic diagram of the structure of the rapid ice-making device described in this embodiment.

[0030] Furthermore, a pressure cover 20 is provided on the top of the ice making bin 11, and the pressure cover 20 is connected to the ice making bin 11 by flange connection. A through hole is provided on the pressure cover 20 for the water supply pipeline 13 to pass through.

[0031] The operation of the rapid ice-making device described in this embodiment is divided into two steps: preparing supercooled water and preparing ice particles. First, add distilled water to the heat exchanger 3 through the water injection port 5, close the water injection port 5 and the safety valve 19, and open the ultrasonic transmitter 21 and the reflector 22; open the temperature control valve 8 and the fan 4, the liquid nitrogen circulates in the cooling circulation pipeline 2, and exchanges heat with the distilled water in the heat exchanger 3; observe the first temperature sensor 6 and the second temperature sensor 7, and close the temperature control valve 8 and the fan 4 when the temperatures of both have stably reached the supercooling temperature; open the second pressure reducing valve 17, the high-pressure gas flows through the second branch pipeline 14, and the second branch pipeline 14 is pre-cooled by the second liquid nitrogen tank 18; then open the first pressure reducing valve 16 and the safety valve 19 to ensure that the pressure of the first pressure reducing valve 16 is greater than that of the second pressure reducing valve 17, and at the same time, the coil 15 is energized to generate an external magnetic field of 0.25T, and the supercooled water is sprayed from the atomizing nozzle 12 into the ice making bin 11, and rapidly nucleates to form ice particles of uniform size under the action of the magnetic field, and flows to the second branch pipeline 14 below the ice drop port.

[0032] The ice particle spraying rust removal system described in this embodiment includes a spray gun body 24, a second high-pressure gas tank 25, an air intake pipe 26 connecting the inner cavity of the spray gun body 24 and the second high-pressure gas tank 25, and an air pressure valve 27 and a mixing chamber 28 sequentially arranged on the air intake pipe 26 along the air intake direction. Figure 2 It is a schematic structural diagram of the ice particle spraying rust removal system of the present invention.

[0033] The top of the mixing chamber 28 is connected to the second branch pipeline 14. An axial flow fan is installed at the outlet end of the air intake duct 26. The axial flow fan is fixed in the air intake duct 26 by a fixing rod (not shown in the figure). The specific structure is as follows: Figure 3 As shown, the axial flow fan is provided with a plurality of forward-swept blades 30. The design of the forward-swept blades 30 can help reduce the formation of ice crystals on the blade surface, thereby reducing the risk of icing. The forward-swept blades 30 are coated with a polyurethane coating for preventing ice particles from adhering. The outlet end of the spray gun body 24 is provided with an ultrasonic heater 29 for heating. The frequency of the ultrasonic heater 29 is 40kHz and the power is 50W.

[0034] The embodiments are preferred implementations of the present invention, but the present invention is not limited to the above-mentioned implementations. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essential content of the present invention belong to the protection scope of the present invention.

Claims

1. A rapid ice-making device, characterized in that: Including supercooled water preparation system, ice making system and control system; The supercooled water preparation system comprises a first liquid nitrogen tank (1), a cooling circulation pipeline (2) connected to the outlet end of the first liquid nitrogen tank (1), a heat exchanger (3) and a fan (4) arranged on the cooling circulation pipeline (2); the heat exchanger (3) comprises a shell, a heat transfer pipe arranged in the shell, and a water injection port (5) for injecting distilled water into the inner cavity of the shell, the inlet and outlet of the heat transfer pipe being in communication with the cooling circulation pipeline (2), and the distilled water in the heat exchanger (3) is brought into a supercooled state by utilizing the liquid nitrogen flowing into the heat transfer pipe; an ultrasonic suspension device is arranged on the heat exchanger (3); a first temperature sensor (6) and a second temperature sensor (7) are respectively arranged in the heat exchanger (3) and in the cooling circulation pipeline (2) downstream of the heat exchanger (3); a temperature control valve (8) is arranged at the outlet end of the first liquid nitrogen tank (1); The ice-making system comprises a first high-pressure gas tank (9), a first branch pipeline (10) for passing the high-pressure gas in the first high-pressure gas tank (9) into the inner cavity of the heat exchanger (3), an ice-making bin (11) arranged below the heat exchanger (3), a water delivery pipeline (13) having one end connected to a water outlet at the bottom of the heat exchanger (3) and the other end connected to an atomizing nozzle (12) on the ice-making bin (11), and a second branch pipeline (14) connecting the first high-pressure gas tank (9) and an ice drop outlet at the bottom of the ice-making bin (11). ); the ice making bin (11) is provided with a coil (15) for generating an external magnetic field in the ice making bin (11); the first branch pipeline (10) and the second branch pipeline (14) upstream of the ice drop outlet are respectively provided with a first pressure reducing valve (16) and a second pressure reducing valve (17); the second branch pipeline (14) between the second pressure reducing valve (17) and the ice drop outlet is provided with a second liquid nitrogen tank (18) for cooling the high-pressure gas flowing downstream; the water delivery pipeline (13) is provided with a safety valve (19); The control system is a computer responsible for controlling the opening and closing of the first pressure reducing valve (16), the second pressure reducing valve (17), the safety valve (19) and the temperature control valve (8).

2. The rapid ice-making device according to claim 1, characterized in that: The strength of the external magnetic field is 0.2-0.3T.

3. The rapid ice-making device according to claim 1, characterized in that: A pressure cover (20) is provided on the top of the ice making bin (11), and the pressure cover (20) is connected to the ice making bin (11) by flange connection. A through hole is provided on the pressure cover (20) for the water delivery pipeline (13) to pass through.

4. The rapid ice-making device according to claim 1, characterized in that: The ultrasonic suspension device comprises an ultrasonic transmitter (21) and a reflector (22) arranged on both sides of the heat exchanger (3).

5. The rapid ice-making device according to claim 1, characterized in that: A one-way valve (23) is provided on the cooling circulation pipeline (2).

6. An ice particle spraying and rust removal system comprising the rapid ice making device according to any one of claims 1 to 5, characterized in that: The spray gun comprises a spray gun body (24), a second high-pressure gas tank (25), an air intake pipe (26) connecting the inner cavity of the spray gun body (24) and the second high-pressure gas tank (25), and an air pressure valve (27) and a mixing chamber (28) arranged on the air intake pipe (26) in sequence along the air intake direction; the top of the mixing chamber (28) is connected to a second branch pipeline (14); and an ultrasonic heater (29) is provided on the outlet end of the spray gun body (24).

7. The ice particle spraying rust removal system according to claim 6, characterized in that: The frequency of the ultrasonic heater (29) is 30-50 kHz, and the power is 50-100 W.

8. The ice particle spraying rust removal system according to claim 6, characterized in that: An axial flow fan is installed at the outlet end of the air inlet duct (26), and the axial flow fan comprises a wheel hub and a plurality of forward-swept blades (30).

9. The ice particle spraying rust removal system according to claim 8, characterized in that: The forward-swept blade (30) is coated with a polyurethane coating for preventing ice particles from adhering.

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