Supercooled water dynamic ice slurry unit

Abstract

The utility model discloses a supercooled water dynamic ice slurry unit which comprises a main cooling loop, a water side loop and a motor electric frequency heat exchange flow path. A compressor, a condenser and an evaporator which are distributed in series are arranged in the main cooling loop, a driving motor is arranged in the compressor and connected with a frequency conversion assembly, and the frequency conversion assembly is used for controlling the rotating speed of the driving motor; an anti-spreading device, a crystallization promoting device and an ice storage tank which are connected in series are arranged in the water side loop; the motor electric frequency heat exchange flow path communicates with the condenser, and at least part of refrigerants in the condenser are suitable for exchanging heat with the driving motor and / or the frequency conversion assembly after entering the motor electric frequency heat exchange flow path and then flow back to the evaporator after exchanging heat with the water side loop through the anti-spreading device. According to the embodiment of the utility model, the heat of the frequency conversion assembly and the driving motor in the compressor is brought to the anti-spreading device through the refrigerant and exchanges heat with the water side loop, so that the problem that the evaporator is frozen due to the fact that ice crystals generated by the crystallization promoting device spread towards the evaporator side is avoided, and the heat is reasonably utilized.

Description

Technical Field

[0001] This utility model relates to the field of cold storage technology, and in particular to a subcooled water dynamic ice slurry unit. Background Technology

[0002] Currently, during the process of making ice slurry in the crystallizer, the cooling water of the subcooled water dynamic ice slurry unit is prone to ice crystal propagation in the subcooled water crystallization pipeline, which can block the pipeline or even freeze the evaporator. It is necessary to install corresponding pipeline equipment on the water supply pipe wall for heating and melting crystals, which consumes heat.

[0003] However, electric heating increases system power consumption, and when cooling water from the condenser is introduced for heating, the water quality is generally poor and can easily cause blockages in the heating pipes. If refrigerant from the condenser is used for heating alone, it will cause a loss of cooling capacity in the system. Therefore, there is room for improvement in how to reduce ice crystal propagation and prevent the evaporator from freezing. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a subcooled water dynamic ice slurry unit. The subcooled water dynamic ice slurry unit transfers the heat from the frequency converter and the drive motor in the compressor to an anti-propagation device via refrigerant. The anti-propagation device then exchanges heat with the water-side circuit, thereby preventing ice formation between the crystallizer and evaporator in the water-side circuit, achieving efficient heat utilization, and reducing system power consumption.

[0005] According to an embodiment of the present invention, a subcooled water dynamic ice slurry unit includes: a main cooling circuit, a water-side circuit, and a motor frequency-controlled heat exchange flow path; the main cooling circuit is provided with a compressor, a condenser, and an evaporator distributed in series, the compressor is provided with a drive motor, the drive motor is connected to a frequency converter, and the frequency converter is used to control the speed of the drive motor; the water-side circuit is provided with an anti-propagation device, a crystallizer, and an ice storage tank distributed in series, the crystallizer is used to generate ice slurry from cooling water and then pass it into the ice storage tank; the motor frequency-controlled heat exchange flow path is connected to the condenser, and at least a portion of the refrigerant in the condenser enters the motor frequency-controlled heat exchange flow path, the refrigerant entering the motor frequency-controlled heat exchange flow path is suitable for heat exchange with the drive motor and / or the frequency converter, and after passing through the anti-propagation device and exchanging heat with the water-side circuit, it flows back to the evaporator.

[0006] According to the subcooled water dynamic ice slurry unit of this utility model embodiment, the refrigerant flows to the motor frequency heat exchange path after passing through the condenser, and then flows to the drive motor through the motor frequency heat exchange path. It also flows through the frequency converter component, and carries the heat of the frequency converter component and the heat of the drive motor in the compressor to the anti-propagation device through the refrigerant. The anti-propagation device exchanges heat with the water-side circuit, thereby reducing the icing problem in the water-side circuit between the crystallizer and the evaporator, achieving reasonable utilization of heat, and reducing system power consumption.

[0007] According to an embodiment of the present invention, the subcooled water dynamic ice slurry unit includes a motor electric frequency heat exchange flow path comprising a motor cooling flow path and a frequency converter component cooling flow path. The inlet of the motor cooling flow path is connected to the outlet of the condenser, and the refrigerant in the condenser is adapted to flow into the motor cooling flow path, and after passing through the drive motor in the compressor, flows into the anti-propagation device. The inlet of the frequency converter component cooling flow path is connected to the outlet of the condenser, and the refrigerant in the frequency converter component cooling flow path, after passing through the frequency converter component, merges with the refrigerant in the motor cooling flow path and flows together into the anti-propagation device.

[0008] According to the embodiment of the present utility model, the subcooled water dynamic ice slurry unit has a common pipeline for the motor cooling flow path and the frequency converter component cooling flow path. The refrigerant in the common pipeline exchanges heat with the anti-propagation device, and the common pipeline is equipped with a first control valve.

[0009] According to an embodiment of the present invention, the cooling flow path of the variable frequency component includes a first inflow branch, a second inflow branch, and an outflow branch. The variable frequency component includes a variable frequency cabinet and a variable frequency drive located inside the variable frequency cabinet. The refrigerant flowing out of the condenser outlet flows to the variable frequency drive through the first inflow branch and then flows into the variable frequency cabinet through the second inflow branch to reduce the temperature inside the variable frequency cabinet. The refrigerant from the outlets of the variable frequency drive and the variable frequency cabinet flows to the common pipeline through the outflow branch.

[0010] According to the embodiment of the present utility model, the outflow branch includes a frequency converter outflow branch and a frequency converter cabinet outflow branch connected in parallel. The frequency converter outflow branch and the frequency converter cabinet outflow branch merge and flow into the common pipeline. The frequency converter outflow branch includes a first outflow branch and a second outflow branch connected in parallel. The first outflow branch is provided with a third expansion valve, and the second outflow branch is provided with a second electrically controlled valve.

[0011] According to an embodiment of the present invention, the subcooled water dynamic ice slurry unit is provided with a first temperature sensor at the inlet of the anti-propagation device and a second temperature sensor at the outlet. The first temperature sensor is located between the evaporator and the anti-propagation device, and the second temperature sensor is located between the anti-propagation device and the crystallizer. A branch circuit is connected in parallel at both ends of the anti-propagation device. The branch circuit is connected to the electric frequency heat exchange flow path of the motor, and the branch circuit is provided with a regulating valve.

[0012] According to the embodiment of the present invention, the subcooled water dynamic ice slurry unit has a first side flow path and a second side flow path inside the evaporator that can exchange heat with each other. The first side flow path is connected to the water side circuit, and the second side flow path is connected to the main cooling circuit.

[0013] According to an embodiment of the present invention, a subcooled water dynamic ice slurry unit further includes a gas-liquid separator, which has at least two inlets and at least two outlets; the outlet of the condenser is connected to one inlet of the gas-liquid separator, and one outlet of the gas-liquid separator is connected to the inlet of the second side flow path of the evaporator, so that after the refrigerant exchanges heat with the water-side circuit, it flows through the outlet of the second side flow path to the other inlet of the gas-liquid separator, and the other outlet of the gas-liquid separator is connected to the inlet of the compressor.

[0014] According to the embodiment of the present invention, in the subcooled water dynamic ice slurry unit, the height of the gas-liquid separator is higher than the height of the evaporator, so that the liquid in the gas-liquid separator flows to the bottom of the evaporator, and the gas in the evaporator flows from the top to the gas-liquid separator, and from the gas-liquid separator to the compressor.

[0015] According to the embodiment of the present invention, the subcooled water dynamic ice slurry unit has an ice storage tank with a water outlet and an ice slurry inlet, and the water outlet is lower than the height of the ice slurry inlet.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram illustrating the basic principle of the subcooled water dynamic ice slurry unit according to an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram illustrating the principle of adding a temperature difference monitoring device at the anti-propagation device to the subcooled water dynamic ice slurry unit according to an embodiment of this utility model.

[0020] Figure label:

[0021] 100 subcooled water dynamic ice slurry unit

[0022] Water-side circuit 1, ice storage tank 11, water outlet 111, ice slurry inlet 112, crystallizer 12, anti-propagation device 13, first filter 14, second filter 15, ice pump 16, first check valve 17, first temperature sensor 18, second temperature sensor 19, main cooling circuit 2, compressor 21, condenser 22, first condensate outlet 221, second condensate outlet 222, water inlet 223, water outlet 224, gas-liquid separator 23, first inlet 231, first outlet 232, second inlet 233, second outlet 234, evaporator 24, first side flow path 241, second side flow path 242, condensation circuit 25, butterfly valve 26, second Check valve 27, second expansion valve 28, motor frequency heat exchange flow path 3, motor cooling flow path 31, ball valve 311, first expansion valve 312, shut-off valve 313, third filter 314, frequency converter component cooling flow path 32, first inflow branch 321, second inflow branch 322, outflow branch 323, frequency converter outflow branch 3231, frequency converter cabinet outflow branch 3232, first outflow branch 3233, second outflow branch 3234, third expansion valve 3235, second solenoid valve 3236, third solenoid valve 3237, fourth filter 324, common pipeline 33, first control valve 331, frequency converter component 34, branch flow path 4, regulating valve 41. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Before describing the embodiments of this utility model, it is necessary to understand that in the industrial field, electricity consumption often accounts for a large proportion of operating costs, and under the current situation of tight electricity supply during peak hours, there may also be power rationing problems. Making reasonable use of peak and off-peak electricity prices is a good solution, and ice storage chiller units have emerged under such circumstances.

[0027] In many industrial sectors, such as the food industry, clean chilled water is often required for production and processing. Compared with the traditional indirect refrigeration static ice solution, a new cold storage system for producing dynamic ice from subcooled water has emerged in recent years. This cold storage system differs from the traditional method of generating static ice. It utilizes the characteristic that clean water will not freeze at zero degrees Celsius. It first produces subcooled water and then generates dynamic ice slurry through a crystallizer 12 for cold storage. This cold storage method produces clean water, and the evaporation temperature of the chiller unit is higher than that of traditional ice storage units, resulting in higher energy efficiency and higher melting efficiency of dynamic ice. It can continuously supply constant-temperature chilled water for a long time, making it an energy-saving, efficient, and pollution-free new technology.

[0028] The following is for reference. Figures 1-2The description of the subcooled water dynamic ice slurry unit 100 according to an embodiment of the present utility model is as follows: the subcooled water dynamic ice slurry unit 100 carries the heat of the frequency converter 34 and the heat of the drive motor in the compressor 21 to the anti-propagation device 13 through the refrigerant and exchanges heat with the water side circuit 1, thereby avoiding the problem of ice crystal propagation in the water side circuit 1 blocking the pipeline or even freezing the evaporator 24, achieving reasonable utilization of heat and reducing system power consumption.

[0029] like Figure 1-2 As shown, a subcooled water dynamic ice slurry unit 100 according to an embodiment of the present invention includes: a main cooling circuit 2.

[0030] The main cooling circuit 2 is equipped with a compressor 21, a condenser 22, and an evaporator 24 connected in series. The compressor 21 contains a drive motor, which is connected to a frequency converter 34. The frequency converter 34 is used to control the speed of the drive motor. The compressor 21 discharges high-temperature and high-pressure gaseous refrigerant into the condenser 22. After exchanging heat with the cooling water in the condenser 22, the refrigerant condenses into liquid refrigerant. Then, after passing through a throttling device, such as a fourth filter 324, it continues to flow towards the evaporator 24 through the second expansion valve 28. In other words, the liquid refrigerant is delivered to the evaporator 24, where it absorbs heat, thereby achieving a cooling effect.

[0031] Furthermore, the compressor 21 contains a drive motor, which is one of the core components of the compressor 21. The drive motor provides the power required by the compressor 21, and the working principle of the compressor 21 is to use the rotation of the drive motor to drive the rotor of the compressor 21 to compress air. The frequency converter 34 is electrically connected to the drive motor. By changing the voltage and frequency through the frequency converter 34, the speed of the drive motor is controlled, which can directly affect the discharge volume and pressure of the compressor 21, thereby optimizing the operating efficiency and performance of the compressor 21 and meeting different working requirements. Figure 1 In this configuration, the inverter component 34 is connected to the cooling plate of the condenser 22, which means that the inverter component 34 can be cooled by the condenser 22.

[0032] In addition, the subcooled water dynamic ice slurry unit 100 also includes a water-side loop 1 and a motor frequency heat exchange flow path 3. The water-side loop 1 is provided with a series-distributed anti-propagation device 13, a crystallizer 12 and an ice storage tank 11. The crystallizer 12 is used to generate ice slurry from the cooling water and then pass it into the ice storage tank 11. The motor frequency heat exchange flow path 3 is connected to the condenser 22 and allows at least part of the refrigerant in the condenser 22 to enter the motor frequency heat exchange flow path 3. The refrigerant entering the motor frequency heat exchange flow path 3 is suitable for heat exchange with the drive motor and / or the frequency converter 34, and then flows back to the evaporator 24 after heat exchange with the water-side loop 1 through the anti-propagation device 13.

[0033] In practice, refer to Figure 1As shown, the cooling water in the water-side circuit 1 flows to the first check valve 17 and the second filter 15 under the action of the ice pump 16, and after filtration, it flows to the anti-propagation device 13, the crystallizer 12 and the ice storage tank 11. The water in the ice storage tank 11 flows to the first filter 14, and after filtration, it flows to the ice pump 16 to realize the circulation ice making. The anti-propagation device 13 in the water-side circuit 1 is actually equivalent to the function of a heat exchanger, and can exchange heat with the motor frequency heat exchange flow path 3. The crystallizer 12 in the water-side circuit 1 can make the cooling water crystallize to generate a mixture of dynamic ice slurry and water, which enters the ice storage tank 11 for cold storage.

[0034] The refrigerant in the main cooling circuit 2 enters the condenser 22 after passing through the compressor 21. A second check valve 27 is provided between the compressor 21 and the condenser 22 to ensure unidirectional flow of the refrigerant. The refrigerant flows through the condenser 22 to the motor frequency heat exchange path 3. The refrigerant in the motor frequency heat exchange path 3 can flow to the drive motor inside the compressor 21 for heat exchange. The refrigerant in the motor frequency heat exchange path 3 can also exchange heat with the frequency converter 34 that controls the speed of the drive motor. Thus, the refrigerant carries away the heat from the drive motor and the frequency converter 34. This heat flows to the anti-propagation device 13 in the water-side circuit 1 and exchanges heat with the water-side circuit 1, avoiding the risk of icing between the crystallizer 12 and the evaporator 24, ensuring normal heat exchange of the evaporator 24, reducing the risk of blockage in the water-side pipeline, and achieving reasonable utilization of the heat of the drive motor and the frequency converter 34, thereby reducing system power consumption.

[0035] In some embodiments, the motor frequency heat exchange flow path 3 includes a motor cooling flow path 31 and a frequency converter component cooling flow path 32; wherein, the inlet of the motor cooling flow path 31 is connected to the outlet of the condenser 22, the refrigerant of the condenser 22 is adapted to flow to the motor cooling flow path 31, and after passing through the drive motor in the compressor 21, it flows to the anti-propagation device 13; the inlet of the frequency converter component cooling flow path 32 is connected to the outlet of the condenser 22, and the refrigerant of the frequency converter component cooling flow path 32, after passing through the frequency converter component 34, merges with the refrigerant of the motor cooling flow path 31 and flows together to the anti-propagation device 13.

[0036] Specifically, the condenser 22 is provided with a first condensation outlet 221 and a second condensation outlet 222. After the refrigerant flows from the compressor 21 into the condenser 22, the cooling water in the water tower flows into the condenser 22 through the inlet 223 and out of the condenser 22 through the outlet 224, since the condenser 22 is provided with an inlet 223 and an outlet 224. The cooling water in the water tower exchanges heat with the refrigerant in the condenser 22, thereby turning the refrigerant into a liquid refrigerant. The refrigerant flows to the motor cooling flow path 31 through the first condensation outlet 221. For example, after the refrigerant flows out of the first condensation outlet 221 of the condenser 22, it passes through the ball... After passing through valve 311, third filter 314, first expansion valve 312, and shut-off valve 313, the refrigerant flows to the drive motor inside compressor 21. The motor cooling flow path 31 passes through the drive motor inside compressor 21 and is connected to the anti-propagation device 13. That is, after the refrigerant passes through the motor cooling flow path 31, it cools the drive motor inside compressor 21 and carries away the heat of the drive motor. The heat carried away by the refrigerant exchanges heat with the water-side circuit 1 through the anti-propagation device 13, which raises the temperature of the water-side circuit 1 and lowers the temperature of the refrigerant, thereby preventing the cooling water of the water-side circuit 1 from freezing and reducing the impact on the heat exchange of evaporator 24.

[0037] Meanwhile, after the refrigerant flows out through the condenser 22, it can also flow through the second condensation outlet 222 to the frequency converter component cooling flow path 32, thereby cooling the frequency converter component 34. After the refrigerant carries away the heat from the frequency converter component 34, it exchanges heat with the water-side circuit 1. In other words, the heat from the frequency converter component 34 and the drive motor can exchange heat with the water-side circuit 1 at the same time, improving the heat exchange efficiency and avoiding the icing problem between the crystallizer 12 and the evaporator 24 in the water-side circuit 1.

[0038] In some embodiments, the motor cooling flow path 31 and the frequency converter component cooling flow path 32 are provided with a common pipe 33, in which the refrigerant in the common pipe 33 exchanges heat with the anti-propagation device 13, and the common pipe 33 is provided with a first control valve 331.

[0039] Combination Figure 1 As shown, the motor cooling flow path 31 is connected to the first condensing outlet 221 of the condenser 22, and the frequency converter cooling flow path 32 is connected to the second condensing outlet 222 of the condenser 22. The motor cooling flow path 31 and the frequency converter cooling flow path 32 are connected to the frequency converter 34 after passing through the drive motor in the compressor 21 to form a common pipe 33. The common pipe 33 is connected to the evaporator 24 after passing through the anti-propagation device 13. Of course, the common pipe 33 can be connected to the evaporator 24 directly or indirectly. That is, after the refrigerant exchanges heat with the water side circuit 1 through the anti-propagation device 13, the refrigerant flows to the evaporator 24 and then flows back to the inlet of the compressor 21 through the evaporator 24.

[0040] Therefore, by setting up a common pipeline 33, the integration of the pipeline is improved, and the refrigerant can simultaneously drive the heat of the drive motor and the frequency converter 34 to exchange heat with the water-side circuit 1. That is, the refrigerant flows into the heat exchanger in the form of coil or sleeve outside the water pipeline of the anti-propagation device 13 to exchange heat with the water-side circuit 1, thus avoiding the problem of ice crystals generated by the crystallizer 12 spreading to the evaporator 24 and causing the evaporator 24 to freeze.

[0041] In addition, the common pipeline 33 is equipped with a first control valve 331, which is a solenoid valve. This can prevent the path between the evaporator 24 and the condenser 22 from being unable to be closed after a sudden power failure, thus preventing low-temperature refrigerant from entering the condenser 22 and freezing the heat exchange tubes.

[0042] In some embodiments, the frequency converter component cooling flow path 32 includes a first inflow branch 321, a second inflow branch 322, and an outflow branch 323. The frequency converter component 34 includes a frequency converter cabinet and a frequency converter located inside the frequency converter cabinet. The refrigerant flowing out of the outlet of the condenser 22 flows to the frequency converter through the first inflow branch 321 and flows into the frequency converter cabinet through the second inflow branch 322 to reduce the temperature inside the frequency converter cabinet. The refrigerant at the outlet of the frequency converter and the frequency converter cabinet flows to the common pipeline 33 through the outflow branch 323.

[0043] That is, the first inflow branch 321 and the second inflow branch 322 are connected in parallel. The refrigerant in the condenser 22 flows to the frequency converter through the first inflow branch 321 to cool the frequency converter and remove its heat. The refrigerant flows to the frequency converter cabinet through the second inflow branch 322 to reduce the humidity and temperature of the frequency converter cabinet and also remove its heat. The two paths can achieve cooling of the frequency converter and the frequency converter cabinet, and the heat from the frequency converter and the frequency converter cabinet can be used for heat exchange with the water-side circuit 1. After flowing through the frequency converter and the frequency converter cabinet, the refrigerant flows to the common pipe 33 through the outflow branch 323, and then flows to the anti-propagation device 13 through the common pipe 33 to exchange heat with the water-side circuit 1.

[0044] In some embodiments, the outflow branch 323 includes a frequency converter outflow branch 3231 and a frequency converter cabinet outflow branch 3232 connected in parallel. After the frequency converter outflow branch 3231 and the frequency converter cabinet outflow branch 3232 merge, they flow into the common pipeline 33. The frequency converter outflow branch 3231 includes a first outflow branch 3233 and a second outflow branch 3234 connected in parallel. The first outflow branch 3233 is provided with a third expansion valve 3235, and the second outflow branch 3234 is provided with a second electrically controlled valve 3236.

[0045] In practice, the outflow branch 323 is divided into two branches: one is the inverter outflow branch 3231, and the other is the inverter cabinet outflow branch 3232. The inverter outflow branch 3231 and the inverter cabinet outflow branch 3232 are connected in parallel. The inverter outflow branch 3231 includes a first outflow branch 3233 and a second outflow branch 3234 connected in parallel. The refrigerant flows to the first outflow branch 3233 and the second outflow branch 3234 respectively, and then converges into the common pipeline 33. The first outflow branch 3233 is equipped with a third expansion valve 323. 5. The second outflow branch 3234 is equipped with a second solenoid valve 3236, and the frequency converter cabinet outflow branch 3232 is equipped with a third solenoid valve 3237. Both the second solenoid valve 3236 and the third solenoid valve 3237 are solenoid valves, thereby achieving reasonable control of flow and pressure. That is, the first outflow branch 3233 controls the outlet pressure and flow area, thereby changing the cooling flow and evaporation temperature. The solenoid valve of the second outflow branch 3234 can be opened when the cooling effect of the first outflow branch 3233 is not obvious, increasing the flow area and reducing the evaporation pressure.

[0046] Therefore, the first outflow branch 3233, the second outflow branch 3234 and the inverter cabinet outflow branch 3232 are connected in parallel to achieve the function of diversion and realize reasonable control of pressure and flow.

[0047] In some embodiments, a first temperature sensor 18 is provided at the inlet of the anti-propagation device 13, and a second temperature sensor 19 is provided at the outlet. The first temperature sensor 18 is located between the evaporator 24 and the anti-propagation device 13, and the second temperature sensor 19 is located between the anti-propagation device 13 and the crystallizer 12. A shunt branch 4 is connected in parallel at both ends of the anti-propagation device 13. The shunt branch 4 is connected to the electric motor frequency heat exchange flow path 3, and the shunt branch 4 is provided with a regulating valve 41.

[0048] In other words, before the cold water flows from the water-side loop 1 to the anti-propagation device 13, the temperature of the cold water flowing to the anti-propagation device 13 is measured by the first temperature sensor 18. After the refrigerant exchanges heat with the water-side loop 1 at the anti-propagation device 13, before the cold water from the water-side loop 1 flows out of the anti-propagation device 13 and flows to the crystallizer 12, the temperature of the cold water after heat exchange is measured by the second temperature sensor 19. By measuring the water temperature at the inlet and outlet of the anti-propagation device 13, if the temperature difference is too large, the regulating valve 41 of the diversion branch 4 is opened. The regulating valve 41 is an electric regulating valve 41, which causes part of the refrigerant to flow to the diversion branch 4 and flow towards the evaporator 24. This reduces the flow rate of refrigerant to the anti-propagation device 13, further reducing the temperature of the cold water after heat exchange between the water-side loop 1 and the refrigerant. This prevents the temperature of the cold water and refrigerant in the water-side loop 1 from becoming too high, which could lead to failure of cold storage or loss of cold energy.

[0049] Therefore, by setting a first temperature sensor 18 at the inlet end of the anti-propagation device 13 and a second temperature sensor 19 at the outlet end, the opening of the electric regulating valve 41 is adjusted. If the water temperature difference is too large, the opening of the electric regulating valve 41 is increased to bypass a portion of the cooled refrigerant so that it does not pass through the anti-propagation device 13, thereby reducing the refrigerant flow rate entering the anti-propagation device 13 for heat exchange and avoiding overheating of the ice water, which would cause a loss of cooling capacity. If the temperature difference is too small, there is a risk of ice crystal propagation. Therefore, the opening of the bypass regulating valve 41 is reduced to increase the refrigerant flow rate entering the anti-propagation device 13, thereby increasing the heat exchange with the ice water and preventing ice crystal propagation. This also reduces the impact of ice crystals on the evaporator 24.

[0050] In some embodiments, the evaporator 24 is provided with a first side flow path 241 and a second side flow path 242 that can exchange heat with each other. The first side flow path 241 is connected to the water side circuit 1, and the second side flow path 242 is connected to the main cooling circuit 2.

[0051] Combination Figure 1 and Figure 2 As shown, the cold water in the water-side circuit 1 flows through the first side flow path 241 in the evaporator 24 to the anti-propagation device 13 and the crystallizer 12. Under the action of the crystallizer 12, it forms ice water and then flows to the ice storage tank 11. At the same time, the refrigerant in the main cooling circuit 2 flows to the second side flow path 242 in the evaporator 24, forming a circulation between the evaporator 24, the compressor 21 and the condenser 22. After the refrigerant flows to the second side flow path 242, the refrigerant in the second side flow path 242 exchanges heat with the cold water in the first side flow path 241. The refrigerant absorbs the heat of the cold water, thereby further reducing the temperature of the cold water and turning it into subcooled water below zero degrees. The subcooled water enters the crystallizer 12 after passing through the anti-propagation device 13, further promoting the formation of ice slurry, which is beneficial for cold storage.

[0052] In some embodiments, the subcooled water dynamic ice slurry unit 100 further includes a gas-liquid separator 23, which has at least two inlets and at least two outlets; the outlet of the condenser 22 is connected to one inlet of the gas-liquid separator 23, and one outlet of the gas-liquid separator 23 is connected to the inlet of the second side flow path 242 of the evaporator 24, so that after the refrigerant exchanges heat with the water-side circuit 1, it flows through the outlet of the second side flow path 242 to the other inlet of the gas-liquid separator 23, and the other outlet of the gas-liquid separator 23 is connected to the inlet of the compressor 21.

[0053] Specifically, the gas-liquid separator 23 is located between the condenser 22 and the evaporator 24. The refrigerant flowing out of the condenser 22 passes through the anti-propagation device 13 and flows to the first inlet 231 of the gas-liquid separator 23. After separation within the gas-liquid separator 23, the liquid flows through the first outlet 232 of the gas-liquid separator 23 to the bottom of the evaporator 24, while the gas inside the evaporator 24 flows through the second inlet 233 of the gas-liquid separator 23 to the upper part of the gas-liquid separator 23. The gaseous refrigerant is then separated and discharged from the gas-liquid separator 23. The gaseous refrigerant flows out through the second outlet 234 and, after being controlled by the butterfly valve 26, flows to the compressor 21 for the next cycle, while the liquid remains at the bottom of the evaporator 24. This reduces the proportion of gas in the evaporator 24 and prevents some liquid from being sucked into the compressor 21, causing liquid carryover. The refrigerant gas returning to the bottom of the evaporator 24 occupies less space than the liquid refrigerant, which avoids the problem of low heat exchange efficiency between the liquid refrigerant and the water-side circuit 1, improves the unit's energy efficiency, and simplifies the system structure.

[0054] In some embodiments, the height of the gas-liquid separator 23 is higher than the height of the evaporator 24, so that the liquid in the gas-liquid separator 23 flows to the bottom of the evaporator 24, and the gas in the evaporator 24 flows from the top to the gas-liquid separator 23 and from the gas-liquid separator 23 to the compressor 21.

[0055] In other words, the refrigerant in the motor frequency heat exchange path 3 and the refrigerant in the main cooling circuit 2 both flow to the gas-liquid separator 23. After passing through the gas-liquid separator 23, the gas and liquid are separated. For example, in the main cooling circuit 2, the refrigerant flowing out of the condenser 22 can flow to the gas-liquid separator 23 after passing through the condensing circuit 25. The condensing circuit 25 is equipped with a second expansion valve 28. The second expansion valve 28 controls the flow rate and pressure of the refrigerant by the temperature change of the refrigerant. The refrigerant in the motor frequency heat exchange path 3 can flow to the gas-liquid separator 23 through the first inlet 231 of the gas-liquid separator 23. Since the height of the gas-liquid separator 23 is higher than the height of the evaporator 24, the liquid in the gas-liquid separator 23 flows to the bottom of the evaporator 24 by gravity and exchanges heat with the water from the ice storage tank 11. At least part of the refrigerant becomes a low-temperature and low-pressure refrigerant gas and returns to the gas-liquid separator 23. Then, through the pipe connected to the gas-liquid separator 23, it enters the compressor 21 from the top of the gas-liquid separator 23, forming a cycle of the main cooling circuit 2.

[0056] Therefore, by setting the height of the gas-liquid separator 23 higher than the height of the evaporator 24, the refrigerant can be made to flow from the gas-liquid separator 23 into the evaporator 24 by using gravity.

[0057] In some embodiments, the ice storage tank 11 is provided with a water outlet 111 and an ice slurry inlet 112, with the water outlet 111 being lower than the ice slurry inlet 112. In practice, the water outlet 111 is located at the bottom of the ice storage tank 11, and the ice slurry inlet 112 is located at the top of the ice storage tank 11. The water outlet 111 is lower than the ice slurry inlet 112. The supercooled water passes through the anti-propagation device 13 and then enters the crystallizer 12. Under the action of the crystallizer 12, crystallization generates a mixture of dynamic ice slurry and water, which enters the ice storage tank 11. In the ice storage tank 11, the ice slurry floats on the surface due to its low density. The water flows to the lower part of the ice storage tank 11 and flows out of the ice storage tank 11 through the water outlet 111. After passing through the first filter 14, it enters the ice pump 16 to form a cycle.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A subcooled water dynamic ice slurry unit, characterized in that, include: The main cooling circuit includes a compressor, a condenser, and an evaporator connected in series. The compressor contains a drive motor, which is connected to a frequency converter for controlling the speed of the drive motor. The water-side circuit includes a series-distributed anti-propagation device, a crystal promoter, and an ice storage tank. The crystal promoter is used to generate ice slurry from the cooling water and then introduce it into the ice storage tank. The motor frequency heat exchange flow path is connected to the condenser, and at least part of the refrigerant in the condenser enters the motor frequency heat exchange flow path. The refrigerant entering the motor frequency heat exchange flow path is suitable for heat exchange with the drive motor and / or the frequency conversion component, and then flows back to the evaporator after heat exchange with the water side circuit through the anti-propagation device.

2. The subcooled water dynamic ice slurry unit according to claim 1, characterized in that, The electric frequency heat exchange path of the motor includes a motor cooling path and a frequency converter component cooling path; The inlet of the motor cooling flow path is connected to the outlet of the condenser. The refrigerant in the condenser is adapted to flow into the motor cooling flow path and, after passing through the drive motor in the compressor, flows into the anti-propagation device. The inlet of the inverter component cooling flow path is connected to the outlet of the condenser. The refrigerant in the inverter component cooling flow path, after passing through the inverter component, merges with the refrigerant in the motor cooling flow path and flows together into the anti-propagation device.

3. The subcooled water dynamic ice slurry unit according to claim 2, characterized in that, The motor cooling flow path and the frequency converter component cooling flow path are provided with a common pipeline. The refrigerant in the common pipeline exchanges heat with the anti-propagation device, and the common pipeline is provided with a first control valve.

4. The subcooled water dynamic ice slurry unit according to claim 3, characterized in that, The frequency converter cooling flow path includes a first inflow branch, a second inflow branch, and an outflow branch. The frequency converter includes a frequency converter cabinet and a frequency converter located inside the frequency converter cabinet. The refrigerant flowing out of the condenser outlet flows to the frequency converter via the first inflow branch, and flows into the frequency converter cabinet via the second inflow branch to reduce the temperature inside the frequency converter cabinet. The refrigerant from the outlets of the frequency converter and the frequency converter cabinet flows to the common pipeline via the outflow branch.

5. The subcooled water dynamic ice slurry unit according to claim 4, characterized in that, The outflow branch includes a frequency converter outflow branch and a frequency converter cabinet outflow branch connected in parallel. The frequency converter outflow branch and the frequency converter cabinet outflow branch merge and flow into the common pipeline. The frequency converter outflow branch includes a first outflow branch and a second outflow branch connected in parallel. The first outflow branch is equipped with a third expansion valve, and the second outflow branch is equipped with a second electrically controlled valve.

6. The subcooled water dynamic ice slurry unit according to claim 1, characterized in that, The anti-propagation device is equipped with a first temperature sensor at its inlet and a second temperature sensor at its outlet. The first temperature sensor is located between the evaporator and the anti-propagation device, and the second temperature sensor is located between the anti-propagation device and the crystallizer. The anti-propagation device has a shunt branch connected in parallel at both ends. The shunt branch is connected to the electric frequency heat exchange flow path of the motor, and the shunt branch is equipped with a regulating valve.

7. The subcooled water dynamic ice slurry unit according to claim 1, characterized in that, The evaporator is provided with a first side flow path and a second side flow path that can exchange heat with each other. The first side flow path is connected to the water side circuit, and the second side flow path is connected to the main cooling circuit.

8. The subcooled water dynamic ice slurry unit according to claim 7, characterized in that, It also includes a gas-liquid separator, which has at least two inlets and at least two outlets; The outlet of the condenser is connected to one inlet of the gas-liquid separator, and one outlet of the gas-liquid separator is connected to the inlet of the second side flow path of the evaporator, so that after the refrigerant exchanges heat with the water-side circuit, it flows through the outlet of the second side flow path to the other inlet of the gas-liquid separator, and the other outlet of the gas-liquid separator is connected to the inlet of the compressor.

9. The subcooled water dynamic ice slurry unit according to claim 8, characterized in that, The height of the gas-liquid separator is higher than the height of the evaporator, so that the liquid in the gas-liquid separator flows to the bottom of the evaporator, and the gas in the evaporator flows from the top to the gas-liquid separator and from the gas-liquid separator to the compressor.

10. The subcooled water dynamic ice slurry unit according to claim 1, characterized in that, The ice storage tank is provided with a water outlet and an ice slurry inlet, and the water outlet is lower than the height of the ice slurry inlet.

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