Crystal promoter, supercooled water dynamic ice making system and deicing control method thereof

Abstract

The present invention discloses a crystal promoter, a supercooled water dynamic ice-making system and a de-icing control method thereof, wherein the crystal promoter comprises a cylindrical body, an inlet is provided at the bottom end of the body, an outlet is provided at the top end of the body, an outer cylinder is provided around the outer wall of the body, the outer cylinder is arranged between the inlet and the outlet, an annular cavity is formed between the outer cylinder and the outer wall of the body, an input port for connecting the annular cavity is provided on the outer cylinder, a slit is provided on the body for connecting the annular cavity and the inner cavity of the body, the slit guides the fluid to be ejected from the annular cavity to the inner cavity of the body in a direction tangent to the inner wall of the body, and the width of the slit gradually decreases along the ejection direction. The present invention has the advantages of simple structure, high degree of automation, good de-icing effect and high efficiency, and can enhance the conveying capacity of ice slurry fluid in the inner cavity of the body, effectively avoid the problem of crystal promoter blockage, and ensure the stability of the ice-making system.

Description

Technical Field

[0001] The present invention relates to the technical field of ice making, and in particular to a crystal promoter, a supercooled water dynamic ice making system and a de-icing control method thereof. Background Art

[0002] Ice-making technology is widely used in industries such as ice storage air conditioning, process cooling, and sports ice. Supercooled water dynamic ice-making technology is a highly efficient option. The operating principle of this technology is as follows: A dedicated, low-temperature-difference plate heat exchanger continuously produces supercooled water below 0°C (typically around -2°C) while still in a liquid phase. Ultrasonic or other disturbances are then applied outside the heat exchanger to induce a phase change in the supercooled water. This ultimately creates a fluidized ice slurry composed of fine ice crystals and liquid water, completing the ice-making process.

[0003] The process of continuously and stably converting supercooled water into fluidized ice slurry is an important part of the supercooled water dynamic ice-making technology. At present, the main method is to allow supercooled water to pass through a cylindrical crystal promoter, and flow into the crystal promoter from the bottom end and then out from the top end. The crystal promoter is provided with an ultrasonic generator, which stimulates the supercooled water passing through the crystal promoter with ultrasonic vibrations, causing it to generate a large number of ice crystal particles quickly. However, the ice crystal particles will also accumulate on the inner cavity wall of the crystal promoter to form a gradually thickening ice-rich layer. Some supercooled water will also freeze directly on the wall surface, thereby increasing the adhesion of the ice-rich layer on the inner wall surface. The gradually thickening ice-rich layer will not only cause blockage problems to the crystal promoter, but also affect the stability of the entire ice-making system. Therefore, it is urgent to solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide a crystal promoter, a supercooled water dynamic ice making system and a de-icing control method thereof in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A crystal promoter comprises a cylindrical body, an inlet is provided at the bottom end of the body, an outlet is provided at the top end of the body, an outer cylinder is sealed around the outer wall of the body, the outer cylinder is arranged between the inlet and the outlet, an annular cavity is formed between the outer cylinder and the outer wall of the body, an input port connected to the annular cavity is provided on the outer cylinder, a slit is provided on the body connecting the annular cavity and the inner cavity of the body, the slit guides the fluid to be sprayed from the annular cavity to the inner cavity of the body, and the injection direction of the slit is tangent to the inner wall of the body, and the width of the slit gradually decreases along the injection direction.

[0007] Furthermore, the inner wall of the body and the side walls of the slit are coated with a hydrophobic coating, which reduces adhesion, effectively reduces the retention of supercooled water and ice crystals on the wall surface, and avoids the formation of an ice-rich layer.

[0008] Furthermore, there are a plurality of slits, which are evenly distributed along the circumferential axis of the body; the fluid ejected from the slits can completely cover the inner wall of the body without leaving any dead corners, effectively removing the ice-rich layer and avoiding clogging of the crystal promoter.

[0009] Furthermore, the side walls of the slits transition smoothly with the inner walls of the body respectively; this can effectively reduce the flow resistance during the fluid injection process, allowing the fluid to be injected from the slits at a higher flow rate, allowing the ice-rich layer to be removed more thoroughly to avoid residue, and achieving good deicing effect and high efficiency.

[0010] Furthermore, a first pressure sensor is provided in the inlet, a second pressure sensor is provided in the outlet, and the input port is connected to an electric valve; this facilitates automatic control, is more intelligent, and saves manpower.

[0011] As a general technical concept, the present invention also provides a supercooled water dynamic ice-making system including the above-mentioned crystal promoter, and also includes a controller, a refrigeration main unit, a supercooled water heat exchanger, a propagation preventer, an ice storage tank, a water pump, an ice crystal filter and a refrigerant pump; the output port of the water pump is connected to the electric valve, and the first pressure sensor, the second pressure sensor, and the electric valve are electrically connected to the controller respectively.

[0012] As a general technical concept, the present invention further provides a de-icing control method based on the above-mentioned ice making system, comprising the following steps:

[0013] Preset safety critical values through the controller;

[0014] The system is started, the first pressure sensor detects the inlet pressure in real time to obtain a first pressure value, and transmits the first pressure value to the controller, while the second pressure sensor detects the outlet pressure in real time to obtain a second pressure value, and transmits the second pressure value to the controller;

[0015] The controller processes the acquired data, subtracts the first pressure value from the second pressure value and calculates the absolute value to obtain a pressure difference;

[0016] The pressure difference is compared with the safety critical value. When the pressure difference is less than the safety critical value, the controller closes the electric valve; when the pressure difference is greater than or equal to the safety critical value, the controller opens the electric valve, and the fluid is transported from the input port to the annular cavity. The fluid passes through the annular cavity and is sprayed toward the inner wall of the body through the slit to remove the ice-rich layer attached to the inner wall of the body.

[0017] The beneficial effects of the present invention are as follows: first, a slit is provided on the main body to connect the annular cavity and the inner cavity of the main body, and an input port is provided on the annular cavity, so that the fluid can enter from the input port, and after passing through the annular cavity, it will flow into the inner cavity of the main body under the guidance of the slit. Since the width of the slit gradually decreases along the injection direction, the fluid passing through the slit is gradually accelerated, and thus injected into the main body at a relatively high flow rate, thereby achieving the effect of breaking the ice-rich layer, and the injection direction is tangent to the inner wall of the main body, thereby easily removing the ice-rich layer. The structure is relatively simple and effectively solves the problems in the prior art; second, making the fluid injection direction tangent to the inner wall of the main body can enhance the ice-rich layer in the main body. The kinetic energy of the fluid in the cavity is used to spirally flow upward, thereby enhancing the overall conveying capacity of the ice slurry fluid in the inner cavity of the main body and avoiding the problem of blockage; thirdly, by setting a pressure sensor and an electric valve, the pressure state of the crystal promoter is detected in real time, so as to know whether the crystal promoter is blocked, and then automatically control the opening and closing of the electric valve to achieve the effect of automatic de-icing, solve the problem of ice-rich layer in the first time, ensure the stability of the ice-making system, and is relatively intelligent; generally speaking, the present invention has the advantages of simple structure, high degree of automation, good de-icing effect and high efficiency, and can enhance the conveying capacity of the ice slurry fluid in the inner cavity of the main body, can effectively avoid the problem of crystal promoter blockage, and ensure the stability of the ice-making system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of the crystal promoter in the present invention;

[0019] Figure 2 2. It is a three-dimensional cross-sectional schematic diagram of the crystal promoter in the present invention;

[0020] Figure 3 It is a three-dimensional cross-sectional schematic diagram of the crystal promoter in the present invention in another direction;

[0021] Figure 4 is a schematic cross-sectional view of a crystal promoter in the present invention;

[0022] Figure 5 It is a schematic diagram of the supercooled water dynamic ice making system of the present invention.

[0023] The following are the descriptions of the reference numerals:

[0024] 10-main body; 101-inner cylinder; 1011-inlet; 1012-outlet; 1013-slit; 102-lower cover; 103-upper cover; 104-guide column; 11-outer cylinder; 111-inlet; 12-annular cavity; 13-ultrasonic vibrator; 14-first pressure sensor; 15-second pressure sensor; 16-electric valve; 20-controller; 30-refrigeration main unit; 40-subcooled water heat exchanger; 50-anti-spreading device; 60-ice storage tank; 70-water pump; 80-ice crystal filter; 90-refrigerant pump. DETAILED DESCRIPTION

[0025] For ease of understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as being "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this invention belongs. The terms used in this specification and in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0027] like Figures 1 to 5 As shown, this embodiment provides a crystal promoter, including a cylindrical body 10, an inlet 1011 is provided at the bottom end of the body 10, an outlet 1012 is provided at the top end of the body 10, an outer cylinder 11 is sealed around the outer wall of the body 10, the outer cylinder 11 is arranged between the inlet 1011 and the outlet 1012, an annular cavity 12 is formed between the outer cylinder 11 and the outer wall of the body 10, an input port 111 is provided on the outer cylinder 11 for connecting with the annular cavity 12, and a slit 1013 is provided on the body 10 for connecting the annular cavity 12 and the inner cavity of the body 10, the slit 1013 guides the fluid to be sprayed from the annular cavity 12 to the inner cavity of the body 10, and the spray direction of the slit 1013 is tangent to the inner wall of the body 10, and the width of the slit 1013 gradually decreases along the spray direction.

[0028] The inner wall of the body 10 and the sidewalls of the slit 1013 are coated with a hydrophobic coating, preferably polytetrafluoroethylene. Specifically, the body 10 comprises a sleeve-shaped inner cylinder 101, with a lower cover 102 and an upper cover 103 respectively bolted and sealed at both ends. An inlet 1011 and an outlet 1012 are provided on the inner cylinder 101. The outer cylinder 11 is integrally welded to the inner cylinder 101. The inlet 1011 and outlet 1012 are both tangentially arranged with the circumference of the inner cylinder 101. This ensures that supercooled water enters the inlet 1011, flows upward in a spiral, and finally flows out of the outlet 1012. It is worth mentioning that the fluid ejected from the slit 1013 can not only remove the ice-rich layer, but also accelerate the speed of the fluid's spiral upward flow, improve the fluid's conveying capacity, avoid the formation of large ice crystal clusters in the inner cavity of the main body 10, and can promptly flush out the ice crystals and the removed ice-rich layer to avoid clogging of the crystal promoter. Therefore, the slit 1013 allows the fluid to spiral in the same direction as the inlet 1011 allows the fluid to spiral in the same direction of rotation. In order to further improve the stability of the fluid's spiral upward flow field, a guide column 104 is usually coaxially arranged in the inner cylinder 101. The guide column 104 is cylindrical, and the upper and lower ends of the guide column 104 are respectively fixed to the upper cover 103 and the lower cover 102, which can play a certain guiding role in the fluid.

[0029] Of course, the crystal promoter includes an ultrasonic vibrator 13, which is installed on the lower cover 102, and the output end of the ultrasonic vibrator 13 is located in the inner cavity of the inner cylinder 101 to ensure its crystal promoting effect.

[0030] There are a number of slits 1013, which are evenly distributed along the circumference of the main body 10. In this embodiment, eight slits 1013 are evenly distributed along the circumference. In practice, other numbers of slits 1013 can be provided, and the number is not limited to that in this embodiment. The side walls of the slits 1013 are smoothly transitioned with the inner wall of the main body 10. Specifically, both side walls of the slits 1013 are a whole arc, which is tangent to the inner wall of the main body 10, and the tangent point is the end point of the arc, which is also the point where the arc meets the inner wall of the main body 10 (refer to Figure 4 As shown, where the arrows indicate the direction of fluid flow).

[0031] A first pressure sensor 14 is provided in the inlet 1011 , a second pressure sensor 15 is provided in the outlet 1012 , and an electric valve 16 is connected to the input port 111 .

[0032] A supercooled water dynamic ice-making system, comprising the aforementioned crystal promoter, further includes a controller 20, a refrigeration unit 30, a supercooled water heat exchanger 40, a propagation preventer 50, an ice storage tank 60, a water pump 70, an ice crystal filter 80, and a refrigerant pump 90. The output port of the water pump 70 is connected to an electric valve 16, and a first pressure sensor 14, a second pressure sensor 15, and the electric valve 16 are each electrically connected to the controller 20. Generally, the electric valve 16 can be directly connected to the output port of the water pump 70, but an external water pump connected to the electric valve 16 can also be connected to ensure the pressure of the fluid ejected from the slit 1013.

[0033] Generally, since the annular cavity 12 is connected to the output port of the water pump 70, there is basically no pressure loss of the fluid, while there are multiple components connected between the inner cavity of the main body 10 and the water pump 70, and there is pressure loss. Therefore, the pressure in the annular cavity 12 is greater than the pressure in the inner cavity of the main body 10, so that the fluid pressure ejected from the slit 1013 is relatively high, and the width of the slit 1013 gradually decreases along the injection direction, which can further accelerate the passing fluid, and the injection direction is tangent to the inner wall of the main body 10, so that the fluid ejected from the slit 1013 can be aimed at the junction of the ice-rich layer and the inner wall of the main body 10, easily lifting the ice-rich layer and breaking it at the same time, and can quickly remove the ice-rich layer with a good removal effect.

[0034] In order to better understand and explain the present ice making system, the following further description is made: the ice storage tank 60, the water pump 70, the ice crystal filter 80, one side of the subcooled water heat exchanger 40, the anti-propagation device 50 and the crystal promoter are connected end to end in sequence to form an ice making circuit; the refrigeration host 30, the other side of the subcooled water heat exchanger 40 and the refrigerant pump 90 are connected end to end in sequence to form a heat exchange circuit, and ethylene glycol antifreeze is preferably used as the refrigerant in the heat exchange circuit (reference Figure 5 shown).

[0035] A de-icing control method, based on the above-mentioned supercooled water dynamic ice making system, includes the following steps:

[0036] The safety threshold is pre-set by the controller 20;

[0037] The system is started, the first pressure sensor 14 detects the pressure of the inlet 1011 in real time to obtain a first pressure value, and transmits the first pressure value to the controller 20. At the same time, the second pressure sensor 15 detects the pressure of the outlet 1012 in real time to obtain a second pressure value, and transmits the second pressure value to the controller 20.

[0038] The controller 20 processes the acquired data, subtracts the first pressure value from the second pressure value and calculates the absolute value to obtain a pressure difference;

[0039] The pressure difference is compared with the safety critical value. When the pressure difference is less than the safety critical value, the controller 20 closes the electric valve 16. When the pressure difference is greater than or equal to the safety critical value, the controller 20 opens the electric valve 16, and the fluid is transported from the input port 111 to the annular cavity 12. The fluid passes through the annular cavity 12 and is sprayed toward the inner wall of the body 10 through the slit 1013 to remove the ice-rich layer attached to the inner wall of the body 10.

[0040] It should be noted that when the ice-rich layer has not formed or is accumulated thinly, it will not affect the normal operation of the crystal promoter, that is, the pressure difference at this time is less than the safety critical value; when the ice-rich layer is thicker, it will cause blockage to the crystal promoter, causing the pressure in the inner cavity of the main body 10 to gradually increase, that is, the pressure difference at this time is greater than or equal to the safety critical value.

[0041] The above shows and describes the basic principles, main features, and advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the invention. Various changes and improvements are possible without departing from the spirit and scope of the invention. Such changes and improvements are intended to fall within the scope of the invention. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A crystal promoter, comprising a cylindrical body, an inlet at the bottom end of the body, and an outlet at the top end of the body, characterized in that: An outer cylinder is sealed around the outer wall of the body, and the outer cylinder is arranged between the inlet and the outlet. An annular cavity is formed between the outer cylinder and the outer wall of the body. An input port connected to the annular cavity is provided on the outer cylinder, and a slit connected to the annular cavity and the inner cavity of the body is provided on the body. The slit guides the fluid to be ejected from the annular cavity to the inner cavity of the body, and the injection direction of the fluid is tangent to the inner wall of the body, and the width of the slit gradually decreases along the injection direction.

2. The crystal promoter according to claim 1, characterized in that: The inner wall of the body and the side walls of the slit are coated with a hydrophobic coating.

3. The crystal promoter according to claim 1, characterized in that: There are a plurality of slits, and the slits are evenly distributed along the circumferential direction of the body axis.

4. The crystal promoter according to claim 1, characterized in that: The side walls of the slit are smoothly transitioned to the inner wall of the body respectively.

5. The crystal promoter according to any one of claims 1 to 4, characterized in that: A first pressure sensor is provided in the inlet, a second pressure sensor is provided in the outlet, and the input port is connected to an electric valve.

6. A supercooled water dynamic ice making system, characterized by: The crystal promoter according to claim 5 further comprises a controller, a refrigeration host, a supercooled water heat exchanger, a propagation preventer, an ice storage tank, a water pump, an ice crystal filter and a refrigerant pump; The output port of the water pump is communicated with the electric valve, and the first pressure sensor, the second pressure sensor, and the electric valve are electrically connected to the controller respectively.

7. A de-icing control method, characterized in that: The supercooled water dynamic ice making system according to claim 6 comprises the following steps: Preset safety critical values through the controller; The system is started, the first pressure sensor detects the inlet pressure in real time to obtain a first pressure value, and transmits the first pressure value to the controller, while the second pressure sensor detects the outlet pressure in real time to obtain a second pressure value, and transmits the second pressure value to the controller; The controller processes the acquired data, subtracts the first pressure value from the second pressure value and calculates the absolute value to obtain a pressure difference; The pressure difference is compared with the safety critical value. When the pressure difference is less than the safety critical value, the controller closes the electric valve; when the pressure difference is greater than or equal to the safety critical value, the controller opens the electric valve, and the fluid is transported from the input port to the annular cavity. The fluid passes through the annular cavity and is sprayed toward the inner wall of the body through the slit to remove the ice-rich layer attached to the inner wall of the body.

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