Direct expansion type supercooled water dynamic ice slurry system and control method

Abstract

The invention relates to the technical field of air conditioning, and discloses a direct expansion type supercooled water dynamic ice slurry system and an air conditioner. The direct expansion type supercooled water dynamic ice slurry system comprises a refrigerating device, an ice making device and an ice melting device. The refrigerating device comprises a compressor, a condenser, a first heat exchanger, a first expansion valve and a gas-liquid separator. The ice making device comprises an ice storage tank, a second heat exchanger and a crystallization promoting device. The ice melting device comprises a third heat exchanger. According to the direct expansion type supercooled water dynamic ice slurry system, the ice making mode of the ice making device, the refrigerating mode of the refrigerating device, the cold supply mode of the ice melting device, the refrigerating mode of the refrigerating device and the ice making mode of the ice making device and the combined cold supply mode of the refrigerating device and the ice melting device can be achieved.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning, and more particularly to a direct expansion subcooled water dynamic ice slurry system and its control method. Background Technology

[0002] The direct expansion subcooled water dynamic ice slurry system can utilize off-peak hours at night to store cooling capacity, and then use the stored cooling capacity to supply cooling to the air conditioning system in part or in whole during peak air conditioning load periods. This achieves the goals of reducing the installed capacity of refrigeration equipment, lowering operating costs, and peak shaving and valley filling of electricity load.

[0003] Among related technologies, the direct expansion subcooled water dynamic ice slurry system can perform ice making and ice melting cooling, but has fewer operating modes. Summary of the Invention

[0004] This application provides a direct expansion subcooled water dynamic ice slurry system and control method. The direct expansion subcooled water dynamic ice slurry system can realize the following modes: ice making device ice making mode, refrigeration device refrigeration mode, ice melting device refrigeration mode, refrigeration device refrigeration and ice making device ice making mode, and refrigeration device and ice melting device combined refrigeration mode.

[0005] In a first aspect, this application provides a direct expansion subcooled water dynamic ice slurry system, comprising:

[0006] Refrigeration device, including:

[0007] compressor;

[0008] The condenser is connected to the compressor;

[0009] The first heat exchanger is provided with a separate first flow channel and a second flow channel;

[0010] The first expansion valve is connected to the condenser;

[0011] The gas-liquid separator is connected to the first expansion valve and the compressor, respectively.

[0012] The first flow channel is connected to the first control valve, which is configured to control whether the first flow channel is connected to or not connected to the gas-liquid separator. The second flow channel is connected to the second control valve and the third control valve respectively. The second control valve is configured to control whether the second flow channel is connected to or not connected to the end return water, and the third control valve is configured to control whether the second flow channel is connected to or not connected to the end supply water.

[0013] Ice-making apparatus, including:

[0014] Ice storage tanks;

[0015] The second heat exchanger is provided with a separated third flow channel and a fourth flow channel. The third flow channel is connected to a fourth control valve, which is configured to control whether the third flow channel is connected to or not connected to the gas-liquid separator.

[0016] The crystallizer is connected to the fourth flow channel and the ice storage tank, respectively;

[0017] The ice-melting device includes:

[0018] The third heat exchanger is equipped with a separate fifth flow channel and a sixth flow channel. The fifth flow channel is connected to the ice storage tank, and the sixth flow channel is connected to the fifth control valve and the sixth control valve respectively. The fifth control valve is configured to control whether the sixth flow channel is connected to or not connected to the terminal return water, and the sixth control valve is configured to control whether the sixth flow channel is connected to or not connected to the terminal supply water.

[0019] In this way, the direct expansion subcooled water dynamic ice slurry system can realize five operating modes: ice making mode of ice making device, refrigeration mode of refrigeration device, ice melting mode of refrigeration device, refrigeration mode of ice making device and ice making device, and refrigeration mode of refrigeration device and ice melting mode of combined refrigeration device and ice melting device, thereby meeting different operating needs.

[0020] In some embodiments, the ice-making apparatus includes:

[0021] The anti-propagation device is located between the second heat exchanger and the crystallizer. The anti-propagation device is equipped with a separated seventh flow channel and an eighth flow channel. The seventh flow channel is connected to the fourth flow channel and the ice storage tank, respectively. The eighth flow channel is connected to the first expansion valve and the second expansion valve, respectively. The second expansion valve is connected to the condenser.

[0022] Anti-propagation devices can reduce the subcooling degree of subcooled water, thereby lowering the temperature and pressure of the refrigerant. Multi-stage throttling is achieved by incorporating a first expansion valve and a second expansion valve. In single-stage throttling, significant flashing of the refrigerant may occur, leading to reduced efficiency. Multi-stage throttling gradually reduces the refrigerant pressure and temperature, effectively minimizing flashing losses.

[0023] In some embodiments, the ice-making apparatus includes:

[0024] The refrigerant subcooler is equipped with a separated ninth and tenth flow channels. The ninth flow channel is connected to the condenser, the first expansion valve, and the second expansion valve, respectively, and the tenth flow channel is connected to the ice storage tank and the fourth flow channel, respectively.

[0025] The seventh control valve is connected in parallel with the ninth flow channel and is connected to the condenser, the first expansion valve, and the second expansion valve.

[0026] In this way, the temperature of the refrigerant is reduced by the refrigerant subcooler.

[0027] In some embodiments, the ice-making apparatus includes:

[0028] The first regenerator is equipped with a separate eleventh and twelfth flow channels. The eleventh flow channel is connected to the ice storage tank and the tenth flow channel, respectively, and the twelfth flow channel is connected to the tenth flow channel and the fourth flow channel, respectively.

[0029] This can raise the water temperature, which helps prevent ice blockage.

[0030] In some embodiments, it also includes:

[0031] The cooling tower has its inlet connected to the condenser and its outlet connected to the ninth control valve, which is configured to control whether the cooling tower's outlet is connected to or not connected to the condenser.

[0032] The second regenerator is equipped with a separate thirteenth and fourteenth flow channels. The thirteenth flow channel is connected to the fourth and twelfth flow channels respectively, and the fourteenth flow channel is connected to the condenser and the eighth control valve respectively. The eighth control valve is configured to control whether the fourteenth flow channel is connected to or not connected to the outlet of the cooling tower.

[0033] The cooling tower is used to cool the refrigerant in the condenser. The second regenerator is used to lower the temperature of the cooling water in the fourteenth flow channel and raise the temperature of the water in the thirteenth flow channel.

[0034] In some embodiments, the refrigeration device further includes an economizer, which is provided with a separated fifteenth flow channel and a sixteenth flow channel. The fifteenth flow channel is connected to a third expansion valve and a compressor, respectively. The third expansion valve is connected to a condenser, and the sixteenth flow channel is connected to the condenser and a ninth flow channel, respectively.

[0035] In this way, the compressor can achieve two-stage compression through the economizer, thereby improving efficiency.

[0036] Secondly, this application provides a control method for a direct expansion subcooled water dynamic ice slurry system, used in the aforementioned direct expansion subcooled water dynamic ice slurry system, the method comprising:

[0037] When the grid load is at its lowest, the direct expansion subcooled water dynamic ice slurry system operates in at least one of the following modes: refrigeration mode of the refrigeration unit, refrigeration mode of the refrigeration unit and ice-making mode, refrigeration mode of the refrigeration unit and ice-melting mode of the refrigeration unit and ice-making mode.

[0038] When the grid load is at a flat level, the direct expansion subcooled water dynamic ice slurry system operates in at least one of the following modes: refrigeration mode of the refrigeration unit, refrigeration mode of the refrigeration unit and ice-making mode, refrigeration mode of the refrigeration unit and ice-melting mode of the refrigeration unit and ice-making mode.

[0039] When the grid load is at its peak, the direct expansion subcooled water dynamic ice slurry system operates in at least one of the following modes: ice melting device for cooling, combined cooling device and ice melting device for cooling, and cooling device for cooling.

[0040] In the ice-making mode of the ice-making device, the first expansion valve is connected, the first control valve is disconnected, the second control valve is disconnected, the third control valve is disconnected, the fourth control valve is connected, the fifth control valve is disconnected, and the sixth control valve is disconnected.

[0041] In the refrigeration mode of the refrigeration unit, the first expansion valve is connected, the first control valve is connected, the second control valve is connected, the third control valve is connected, the fourth control valve is disconnected, the fifth control valve is disconnected, and the sixth control valve is disconnected.

[0042] In the cooling mode of the ice melting device, the first expansion valve is disconnected, the first control valve is disconnected, the second control valve is disconnected, the third control valve is disconnected, the fourth control valve is disconnected, the fifth control valve is connected, and the sixth control valve is connected.

[0043] In the mode where the refrigeration unit is refrigerating and the ice-making unit is making ice, the first expansion valve is connected, the first control valve is connected, the second control valve is connected, the third control valve is connected, the fourth control valve is connected, the fifth control valve is disconnected, and the sixth control valve is disconnected.

[0044] In the combined cooling mode of the refrigeration unit and the ice-melting unit, the first expansion valve is connected, the first control valve is connected, the second control valve is connected, the third control valve is connected, the fourth control valve is disconnected, the fifth control valve is connected, and the sixth control valve is connected.

[0045] By adopting different operating modes during off-peak, normal, and peak electricity periods, electricity costs can be saved.

[0046] In some embodiments, when the grid load is at a low point, the predicted value of the user-side cooling load, the liquid level of the ice storage tank, and the cooling capacity of the refrigeration unit for the day are obtained and a judgment is made.

[0047] If the predicted cooling load on the user side is 0 and the liquid level is 100 on the day, then the operation will be terminated.

[0048] If the predicted user-side cooling load for the day is 0 and the liquid level is not 100, then the ice-making device will be operated in ice-making mode.

[0049] If the predicted user-side cooling load for the day is not equal to 0, then determine whether the cooling capacity is not less than the predicted user-side cooling load for the day.

[0050] If the liquid level is 100 and the cooling capacity is not less than the predicted cooling load on the user side for the day, then the refrigeration unit will be operated in cooling mode.

[0051] If the liquid level is 100 and the cooling capacity is less than the predicted cooling load on the user side for the day, then the refrigeration unit and the ice-melting unit will be used in combination for cooling.

[0052] If the liquid level is not equal to 100 and the cooling capacity is not less than the predicted cooling load on the user side for the day, then the refrigeration unit will operate in a mode where the refrigeration unit cools and the ice-making unit makes ice.

[0053] If the liquid level is not equal to 100, the cooling capacity is less than the predicted cooling load on the user side for the day; if the liquid level is not equal to 0, then the refrigeration unit and the ice melting unit will be used in combination for cooling.

[0054] If the liquid level is not equal to 100, the cooling capacity is less than the predicted cooling load on the user side for the day, and the liquid level is equal to 0, then the refrigeration unit will operate in cooling mode.

[0055] In this way, during off-peak hours, the refrigeration unit will operate primarily for cooling and the ice-making unit for making ice, which is conducive to making full use of low-priced electricity.

[0056] In some embodiments, when the grid load is at a flat level, the predicted value of the user-side cooling load, the liquid level of the ice storage tank, and the cooling capacity of the refrigeration unit are obtained and judged.

[0057] If the predicted cooling load on the user side is 0 and the liquid level is 100 on the day, then the operation will be terminated.

[0058] If the predicted user-side cooling load for the day is 0 and the liquid level is not 100, then the ice-making device will be operated in ice-making mode.

[0059] If the predicted user-side cooling load for the day is not equal to 0 and the liquid level is equal to 0, then the refrigeration unit will operate in cooling mode.

[0060] If the predicted user-side cooling load for the day is not equal to 0, the liquid level is not equal to 0 and not equal to 100, and the cooling capacity is not less than the predicted user-side cooling load for the day, the mode of refrigeration unit cooling and ice-making unit making ice is used.

[0061] If the predicted user-side cooling load for the day is not equal to 0, the liquid level is not equal to 0, and the cooling capacity is less than the predicted user-side cooling load for the day, then the refrigeration unit and the ice-melting unit will operate in a combined cooling mode.

[0062] In this way, the load is balanced during the time of the affordable electricity, and the refrigeration unit operates at full load. When the cooling capacity of the refrigeration unit is greater than the cooling load, the excess is stored in the ice storage tank. When the cooling load is greater than the cooling capacity of the refrigeration unit, the insufficient portion is provided by the ice storage tank.

[0063] In some embodiments, when the grid load is at its peak, the predicted value of the user-side cooling load, the liquid level of the ice storage tank, and the cooling capacity of the refrigeration unit are obtained and a judgment is made.

[0064] If the predicted user-side cooling load for the day is equal to 0, then operation will cease.

[0065] If the predicted user-side cooling load for the day is not equal to 0 and the liquid level is equal to 0, then the refrigeration unit will operate in cooling mode.

[0066] If the predicted user-side cooling load for the day is not equal to 0, the liquid level is not equal to 0, and the cooling capacity provided by the ice-melting device under full load is not less than the predicted user-side cooling load for the day, then the ice-melting device will be used for cooling.

[0067] If the predicted user-side cooling load for the day is not equal to 0, the liquid level is not equal to 0, and the cooling capacity provided by the ice-melting device under full load is less than the predicted user-side cooling load for the day, then the refrigeration device and the ice-melting device will operate in a combined cooling mode.

[0068] In this way, when electricity prices are high, the main cooling method is to use ice-melting devices, which helps to save on electricity costs. Attached Figure Description

[0069] Figure 1 A schematic diagram of a first structure of a direct expansion subcooled water dynamic ice slurry system provided in an embodiment of this application;

[0070] Figure 2 A schematic diagram of a second structure of a direct expansion subcooled water dynamic ice slurry system provided in an embodiment of this application;

[0071] Figure 3 A schematic diagram of a third structure of the direct expansion subcooled water dynamic ice slurry system provided in an embodiment of this application;

[0072] Figure 4 A schematic diagram of the flow direction in the first mode of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application;

[0073] Figure 5 A schematic diagram of the flow direction of the second mode of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application;

[0074] Figure 6 A schematic diagram of the flow direction in the third mode of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application;

[0075] Figure 7 A schematic diagram of the flow direction in the fourth mode of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application;

[0076] Figure 8 A schematic diagram of the flow direction in the fifth mode of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application;

[0077] Figure 9 A schematic flowchart illustrating the control method for a direct expansion subcooled water dynamic ice slurry system provided in an embodiment of this application;

[0078] Figure 10 A schematic diagram of the process for obtaining the predicted value of the user-side cooling load on the day in the control method of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application;

[0079] Figure 11 A schematic diagram of the process for obtaining the liquid level of the ice storage tank in the control method of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application;

[0080] Figure 12 A flowchart illustrating the control method of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application when the power grid load is at a low point.

[0081] Figure 13 A flowchart illustrating the control method of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application when the power grid load is at a flat level.

[0082] Figure 14 A flowchart illustrating the control method of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application when the power grid load is at its peak.

[0083] Figure 15 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this application.

[0084] Explanation of reference numerals in the attached figures:

[0085] 100 - Refrigeration unit; 110 - Compressor; 120 - Condenser; 130 - First heat exchanger; 131 - First flow channel; 132 - Second flow channel; 140 - First expansion valve; 150 - Gas-liquid separator; 160 - First control valve; 170 - Second control valve; 180 - Third control valve; 190 - Second expansion valve; 1100 - Economizer; 1101 - Fifteenth flow channel; 1102 - Sixteenth flow channel; 1110 - Third expansion valve;

[0086] 200-Ice making unit; 210-Ice storage tank; 220-Second heat exchanger; 221-Third flow channel; 222-Fourth flow channel; 230-Fourth control valve; 240-Crystallizer; 250-Anti-propagation device; 260-Refrigerant subcooler; 261-Ninth flow channel; 262-Tenth flow channel; 270-Seventh control valve; 280-First regenerator; 281-Eleventh flow channel; 282-Twelfth flow channel; 290-Ice storage pump;

[0087] 300 - Ice melting device; 310 - Third heat exchanger; 311 - Fifth flow channel; 312 - Sixth flow channel; 320 - Fifth control valve; 330 - Sixth control valve; 340 - Ice melting pump;

[0088] 400 - Cooling Tower;

[0089] 500 - Eighth control valve;

[0090] 600 - Second regenerator; 610 - Thirteenth flow channel; 620 - Fourteenth flow channel;

[0091] 700 - Ninth control valve;

[0092] 800 - Air conditioner; 810 - Air conditioner unit;

[0093] 900-Direct expansion subcooled water dynamic ice slurry system. Detailed Implementation

[0094] Subcooled water dynamic ice slurry production technology is gradually being applied in the industrial production and processing of dairy products, vaccines, and chilled foods, serving as an advanced 0-2℃ cold source solution. The principle of subcooled water dynamic ice making is as follows: water is cooled to a subcooled state in a heat exchanger, meaning that the subcooled water is below the freezing point but does not freeze. When it flows through a crystallizer, the subcooled state of the water is eliminated, and it becomes ice slurry that is stored in an ice storage tank. It can be used directly or in refrigeration scenarios.

[0095] Typically, direct expansion subcooled water dynamic ice slurry systems use a chiller as the cold source, with an ethylene glycol aqueous solution serving as an intermediate heat exchange medium between the chiller and the subcooled water heat exchanger to produce subcooled water. However, ice-making methods using ethylene glycol as a refrigerant have drawbacks. Specifically, due to the secondary heat transfer, the evaporation temperature of the chiller is relatively low (-5°C), resulting in low unit cooling efficiency. Maintenance requires ensuring the concentration and quality of the ethylene glycol solution to prevent system pipe blockage and corrosion. Furthermore, ethylene glycol solution has a certain degree of toxicity; therefore, system design and operation must prevent leaks to ensure safety.

[0096] Direct expansion subcooled water dynamic ice slurry technology refers to the direct heat exchange between refrigerant and water, causing the water to crystallize into flocculent ice crystals. The formation and melting processes do not require secondary heat exchange, thereby improving energy efficiency. In addition, the porosity of the ice slurry is much larger than that of solid ice, and it directly exchanges heat with the user's return water, resulting in timely load response.

[0097] Among related technologies, the direct expansion subcooled water dynamic ice slurry system can perform ice making and melting, but its limited operating modes cannot meet diverse operational needs. This system stores cooling capacity during off-peak electricity hours and releases it to users during peak electricity hours. However, this requires the main unit and ice storage tank to be configured to meet peak load demands, resulting in higher costs.

[0098] Therefore, to solve the above-mentioned technical problems, this application provides a direct expansion subcooled water dynamic ice slurry system and an air conditioner. The direct expansion subcooled water dynamic ice slurry system includes a refrigeration unit, an ice-making unit, and an ice-melting unit. The refrigeration unit includes a compressor, a condenser, a first heat exchanger, a first expansion valve, and a gas-liquid separator. The condenser is connected to other condensers. The first heat exchanger has a separated first flow channel and a second flow channel. The first expansion valve is connected to the first flow channel. The gas-liquid separator is connected to both the first expansion valve and the compressor. The first flow channel is connected to a first control valve, which is configured to control whether the first flow channel is connected to or not connected to the gas-liquid separator. The second flow channel is connected to both a second control valve and a third control valve. The second control valve is configured to control whether the second flow channel is connected to or not connected to the terminal return water, and the third control valve is configured to control whether the second flow channel is connected to or not connected to the terminal supply water. The ice-making unit includes an ice storage tank, a second heat exchanger, and a crystallizer. The second heat exchanger has separate third and fourth flow channels. The third flow channel is connected to a fourth control valve, which is configured to control whether the third flow channel is connected to or disconnected from the gas-liquid separator. The crystallizer is connected to both the fourth flow channel and the ice storage tank. The ice-melting device includes a third heat exchanger. The third heat exchanger has separate fifth and sixth flow channels. The fifth flow channel is connected to the ice storage tank, and the sixth flow channel is connected to both a fifth and a sixth control valve. The fifth control valve is configured to control whether the sixth flow channel is connected to or disconnected from the terminal return water, and the sixth control valve is configured to control whether the sixth flow channel is connected to or disconnected from the terminal supply water. In the ice-making mode of the ice-making device, the first expansion valve is connected, the first control valve is disconnected, the second control valve is disconnected, the third control valve is disconnected, the fourth control valve is connected, the fifth control valve is disconnected, and the sixth control valve is disconnected. In the cooling mode of the refrigeration device, the first expansion valve is connected, the first control valve is connected, the second control valve is connected, the third control valve is connected, the fourth control valve is disconnected, the fifth control valve is disconnected, and the sixth control valve is disconnected. In the mode where the ice-melting device supplies cooling, the first expansion valve is disconnected, the first control valve is disconnected, the second control valve is disconnected, the third control valve is disconnected, the fourth control valve is disconnected, the fifth control valve is connected, and the sixth control valve is connected. In the mode where the refrigeration unit cools and the ice-making unit makes ice, the first expansion valve is connected, the first control valve is connected, the second control valve is connected, the third control valve is connected, the fourth control valve is connected, the fifth control valve is disconnected, and the sixth control valve is disconnected. In the mode where the refrigeration unit and the ice-melting device jointly supply cooling, the first expansion valve is connected, the first control valve is connected, the second control valve is connected, the third control valve is connected, the fourth control valve is disconnected, the fifth control valve is connected, and the sixth control valve is connected. Thus, the direct expansion subcooled water dynamic ice slurry system can achieve five operating modes: ice-making mode, refrigeration mode, ice-melting device cooling mode, refrigeration mode with ice-making device, and combined refrigeration and ice-melting device cooling mode, thereby meeting different operational needs.

[0099] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0100] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0101] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0102] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0103] Figure 1 This is a schematic diagram of the first structure of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application.

[0104] See Figure 1 As shown, this application provides a direct expansion subcooled water dynamic ice slurry system, including a refrigeration unit 100. The refrigeration unit 100 utilizes a refrigerant to provide cooling capacity.

[0105] In some embodiments, the refrigeration device 100 includes a compressor 110. The compressor 110 is responsible for compressing low-pressure gaseous refrigerant into high-pressure gaseous refrigerant.

[0106] For example, compressor 110 can be a liquid-suspended, gas-suspended, or magnetically suspended oil-free compressor.

[0107] In some embodiments, the refrigeration device 100 includes a condenser 120, which is in communication with the compressor 110. The condenser 120 is used to cool and condense the high-pressure gaseous refrigerant into a liquid state.

[0108] In some embodiments, the refrigeration device 100 includes a first heat exchanger 130, which is used to exchange heat between the refrigerant and the water at the user end, thereby reducing the temperature of the water at the user end. The first heat exchanger 130 is provided with a separated first flow channel 131 and a second flow channel 132.

[0109] In some embodiments, the refrigeration device 100 includes a first expansion valve 140. The first expansion valve 140 is connected to a first flow channel 131. The function of the first expansion valve 140 is to reduce the pressure of the refrigerant, causing it to change from a high-pressure liquid state to a low-pressure liquid state, while simultaneously causing partial evaporation.

[0110] In some embodiments, the refrigeration device 100 includes a gas-liquid separator 150 for separating gaseous refrigerant and liquid refrigerant. The gas-liquid separator 150 is connected to a first expansion valve 140 and a compressor 110, respectively.

[0111] The first flow channel 131 is connected to the first control valve 160, which is configured to control whether the first flow channel 131 is connected to or not connected to the gas-liquid separator 150. The second flow channel 132 is connected to both the second control valve 170 and the third control valve 180. The second control valve 170 is configured to control whether the second flow channel 132 is connected to or not connected to the end return water, and the third control valve 180 is configured to control whether the second flow channel 132 is connected to or not connected to the end supply water.

[0112] In some embodiments, the direct expansion subcooled water dynamic ice slurry system includes an ice-making device 200, which uses the cooling capacity provided by the refrigeration device 100 to make ice.

[0113] In some embodiments, the ice-making apparatus 200 includes an ice storage tank 210. The ice storage tank 210 is used to store ice slurry.

[0114] In some embodiments, the ice storage tank 210 is equipped with a level gauge for detecting the liquid level in the ice storage tank 210. The level gauge type includes, but is not limited to, submersible, magnetic, float, and capacitive types.

[0115] In some embodiments, the ice-making apparatus 200 includes a second heat exchanger 220. The second heat exchanger 220 is used to achieve heat exchange between the refrigerant and the ice slurry, thereby increasing the subcooling of the ice slurry.

[0116] The second heat exchanger 220 is provided with a separated third flow channel 221 and a fourth flow channel 222. The third flow channel 221 is connected to the fourth control valve 230. The fourth control valve 230 is configured to control whether the third flow channel 221 is connected to or not connected to the gas-liquid separator 150. The fourth flow channel 222 is connected to the ice storage tank 210.

[0117] In some embodiments, the ice-making apparatus 200 includes a crystallizer 240. The crystallizer 240 is used to promote the formation of ice crystals. The crystallizer 240 is connected to the fourth flow channel 222 and the ice storage tank 210, respectively.

[0118] In some embodiments, the direct expansion subcooled water dynamic ice slurry system includes an ice melting device 300, which uses ice slurry for cooling.

[0119] In some embodiments, the ice-melting device 300 includes a third heat exchanger 310. The third heat exchanger 310 is used to achieve heat exchange between the refrigerant and the user-side water.

[0120] The third heat exchanger 310 is provided with a separated fifth flow channel 311 and a sixth flow channel 312. The fifth flow channel 311 is connected to the ice storage tank 210, and the sixth flow channel 312 is connected to the fifth control valve 320 and the sixth control valve 330 respectively. The fifth control valve 320 is configured to control whether the sixth flow channel 312 is connected to or not connected to the terminal return water, and the sixth control valve 330 is configured to control whether the sixth flow channel 312 is connected to or not connected to the terminal supply water.

[0121] In the ice-making mode of the ice-making device 200, the first expansion valve 140 is connected, the first control valve 160 is disconnected, the second control valve 170 is disconnected, the third control valve 180 is disconnected, the fourth control valve 230 is connected, the fifth control valve 320 is disconnected, and the sixth control valve 330 is disconnected.

[0122] Refrigerant in compressor 110 enters gas-liquid separator 150 via condenser 120 and first expansion valve 140. After separation in gas-liquid separator 150, part of the refrigerant enters compressor 110, and part of the refrigerant flows back to gas-liquid separator 150 via fourth control valve 230 and third flow channel 221 of second heat exchanger 220. Water in ice storage tank 210 enters fourth flow channel 222 of second heat exchanger 220, where it exchanges heat with refrigerant, thereby increasing the subcooling of the water and keeping its temperature below zero degrees Celsius. For example, the temperature of the subcooled water flowing out of fourth flow channel 222 is -1.5 degrees Celsius. After ice crystals are formed in crystallizer 240, the subcooled water flows into ice storage tank, thus completing the dynamic ice slurry production.

[0123] In the refrigeration mode of the refrigeration unit, the first expansion valve 140 is connected, the first control valve 160 is connected, the second control valve 170 is connected, the third control valve 180 is connected, the fourth control valve 230 is disconnected, the fifth control valve 320 is disconnected, and the sixth control valve 330 is disconnected.

[0124] Refrigerant in compressor 110 enters gas-liquid separator 150 via condenser 120 and first expansion valve 140. After separation in gas-liquid separator 150, part of the refrigerant enters compressor 110, and part of the refrigerant flows back to gas-liquid separator 150 via first control valve 160 and first flow channel 131 of first heat exchanger 130. Return water from the user terminal enters second flow channel 132 via second control valve 170 to exchange heat with the refrigerant in first flow channel 131. After the temperature of the return water decreases, it flows to the user terminal via third control valve 180.

[0125] In the cooling mode of the ice melting device, the first expansion valve 140 is disconnected, the first control valve 160 is disconnected, the second control valve 170 is disconnected, the third control valve 180 is disconnected, the fourth control valve 230 is disconnected, the fifth control valve 320 is connected, and the sixth control valve 330 is connected.

[0126] Ice slurry in ice storage tank 210 flows back to ice storage tank 210 via the fifth flow channel 311 of the third heat exchanger 310. User terminal return water flows through the fifth control valve 320 to the sixth flow channel 312 to exchange heat with the ice slurry in the fifth flow channel 311. After the temperature of the user terminal return water decreases, it flows through the sixth control valve 330 to the terminal water supply (supply to the user terminal).

[0127] In the mode where the refrigeration unit is refrigerating and the ice-making unit 200 is making ice, the first expansion valve 140 is connected, the first control valve 160 is connected, the second control valve 170 is connected, the third control valve 180 is connected, the fourth control valve 230 is connected, the fifth control valve 320 is disconnected, and the sixth control valve 330 is disconnected.

[0128] Refrigerant in compressor 110 enters gas-liquid separator 150 via condenser 120 and first expansion valve 140. After separation in gas-liquid separator 150, part of the refrigerant enters compressor 110, and part of the refrigerant flows back to gas-liquid separator 150 via first control valve 160 and first flow channel 131 of first heat exchanger 130. Part of the refrigerant flows back to gas-liquid separator 150 via fourth control valve 230 and third flow channel 221 of second heat exchanger 220.

[0129] The return water from the user terminal enters the second flow channel 132 through the second control valve 170 and exchanges heat with the refrigerant in the first flow channel 131. After the temperature of the return water from the user terminal decreases, it flows to the terminal water supply (supply to the user terminal) through the third control valve 180.

[0130] Water in ice storage tank 210 enters the fourth flow channel 222 of the second heat exchanger 220, where it exchanges heat with the refrigerant, thereby increasing the subcooling of the water and keeping its temperature below zero. After the subcooled water passes through crystallizer 240 to form ice crystals, it flows back to ice storage tank 210, thus completing the ice-making process.

[0131] In the combined cooling mode of the refrigeration unit and the ice-melting unit, the first expansion valve 140 is connected, the first control valve 160 is connected, the second control valve 170 is connected, the third control valve 180 is connected, the fourth control valve 230 is disconnected, the fifth control valve 320 is connected, and the sixth control valve 330 is connected.

[0132] Refrigerant in compressor 110 enters gas-liquid separator 150 via condenser 120 and first expansion valve 140. After separation in gas-liquid separator 150, part of the refrigerant enters compressor 110, and part of the refrigerant flows back to gas-liquid separator 150 via first control valve 160 and first flow channel 131 of first heat exchanger 130. User-end return water enters second flow channel 132 via second control valve 170 to exchange heat with the refrigerant in first flow channel 131. After the user-end return water temperature decreases, it flows to the end-user water supply via third control valve 180. Ice slurry in ice storage tank 210 flows back to ice storage tank 210 via fifth flow channel 311 of third heat exchanger 310. User-end return water flows to sixth flow channel 312 via fifth control valve 320 to exchange heat with the ice slurry in fifth flow channel 311. After the user-end return water temperature decreases, it flows to the end-user water supply via sixth control valve 330.

[0133] Understandably, the direct expansion subcooled water dynamic ice slurry system can achieve five operating modes: ice making mode, refrigeration mode, ice melting mode, refrigeration mode and ice making mode, and refrigeration mode and ice melting mode, thereby meeting different operating needs.

[0134] In some embodiments, the ice-making apparatus 200 includes an ice storage pump 290, which is connected to an ice storage tank 210 and a fourth flow channel 222. The ice storage pump 290 provides power for the flow of ice slurry.

[0135] In some embodiments, the ice-melting device 300 includes an ice-melting pump 340, which is connected to the ice storage tank 210 and the fifth flow channel 311. The ice-melting pump 340 provides power for the flow of ice slurry.

[0136] Figure 2 This is a schematic diagram of a second structure of the direct expansion subcooled water dynamic ice slurry system provided in an embodiment of this application. Figure 3 This is a schematic diagram of a third structure of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application.

[0137] See Figure 2 and Figure 3 As shown, in some embodiments, the ice-making apparatus 200 includes an anti-propagation device 250. The anti-propagation device 250 is used to reduce the subcooling of the subcooled water, thereby reducing the temperature and pressure of the refrigerant.

[0138] The anti-propagation device 250 is located between the second heat exchanger 220 and the crystal promoter 240. The anti-propagation device 250 is provided with a separated seventh flow channel and an eighth flow channel. The seventh flow channel is connected to the fourth flow channel 222 and the crystal promoter 240 respectively. The eighth flow channel is connected to the first expansion valve 140 and the second expansion valve 190 respectively. The second expansion valve 190 is connected to the condenser 120.

[0139] The subcooled water flowing out of the fourth flow channel 222 flows into the seventh flow channel, where it exchanges heat with the refrigerant in the eighth flow channel before flowing into the crystal promoter 240. For example, the temperature of the subcooled water flowing out of the fourth flow channel 222 is -1.5 degrees Celsius, and the temperature of the subcooled water flowing out of the seventh flow channel is -0.5 degrees Celsius. The temperature of the ice slurry flowing out of the crystal promoter 240 is 0 degrees Celsius.

[0140] The refrigerant flowing out of the condenser 120 is partially throttled by the first expansion valve 140 and then flows to the gas-liquid separator 150. The remaining portion is throttled by the second expansion valve 190 and then enters the eighth flow channel, and is throttled again by the first expansion valve 140 before flowing into the gas-liquid separator 150.

[0141] Understandably, multi-stage throttling is achieved by setting the first expansion valve 140 and the second expansion valve 190. In single-stage throttling, the refrigerant may experience significant flashing, leading to reduced efficiency. Through multi-stage throttling, the refrigerant pressure and temperature gradually decrease, effectively reducing flashing losses.

[0142] It should be noted that direct expansion subcooled water dynamic ice slurry systems are prone to ice blockage. In the ice storage tank 210, only a portion of the water freezes into ice, while the majority remains liquid. This liquid water is cooled into subcooled water in the second heat exchanger 220. Since subcooling is a metastable and extremely unstable state for water, disrupting this state can lead to ice crystal formation. Therefore, to effectively prevent ice blockage, the water temperature needs to be increased to above zero degrees Celsius before entering the second heat exchanger 220, reducing the probability of ice blockage. However, using electric heating consumes a significant amount of energy.

[0143] In some embodiments, the ice-making apparatus 200 includes a refrigerant subcooler 260.

[0144] The refrigerant subcooler 260 is provided with a separated ninth flow channel 261 and tenth flow channel 262. The ninth flow channel 261 is connected to the condenser 120, the first expansion valve 140 and the second expansion valve 190, respectively, and the tenth flow channel 262 is connected to the ice storage tank 210 and the fourth flow channel 222, respectively.

[0145] The ice-making device 200 includes a seventh control valve 270, which is connected in parallel with the ninth flow channel 261. The seventh control valve 270 is connected to the condenser 120, the first expansion valve 140, and the second expansion valve 190.

[0146] The refrigerant flowing out of condenser 120 flows through the ninth channel 261 to the first expansion valve 140 and the second expansion valve 190. The water flowing out of ice storage tank 210 flows through the tenth channel 262 to the fourth channel 222. The refrigerant in the ninth channel 261 and the water in the tenth channel 262 exchange heat, thereby lowering the temperature of the refrigerant and raising the temperature of the water.

[0147] In some embodiments, the ice-making apparatus 200 includes a first regenerator 280. The first regenerator 280 is used to increase the temperature of the water and reduce the probability of ice blockage in the second regenerator.

[0148] The first regenerator 280 is provided with a separate eleventh flow channel 281 and twelfth flow channel 282. The eleventh flow channel 281 is connected to the ice storage tank 210 and the tenth flow channel 262 respectively, and the twelfth flow channel 282 is connected to the tenth flow channel 262 and the fourth flow channel 222 respectively.

[0149] Water flowing out of ice storage tank 210 flows through eleventh flow channel 281, tenth flow channel 262 and twelfth flow channel 282 to fourth flow channel 222. In this way, the water in twelfth flow channel 282 can heat the water in eleventh flow channel 281.

[0150] In some embodiments, the direct expansion subcooled water dynamic ice slurry system includes a cooling tower 400. The cooling tower 400 is used to cool the refrigerant in the condenser 120. The inlet of the cooling tower 400 is connected to the condenser 120, and the outlet of the cooling tower 400 is connected to a ninth control valve 700, which is configured to control whether the outlet of the cooling tower 400 is connected to or not connected to the condenser 120.

[0151] In some embodiments, the direct expansion subcooled water dynamic ice slurry system includes a fan for cooling the cooling tower 400.

[0152] The direct expansion subcooled water dynamic ice slurry system includes a second regenerator 600. The second regenerator 600 lowers the temperature of the cooling water in the cooling tower 400 and raises the temperature of the water entering the second heat exchanger 220. This improves condensation efficiency, reduces fan energy consumption, and achieves energy savings.

[0153] The second regenerator 600 is provided with a separated thirteenth flow channel 610 and fourteenth flow channel 620. The thirteenth flow channel 610 is connected to the fourth flow channel 222 and the twelfth flow channel 282 respectively. The fourteenth flow channel 620 is connected to the condenser 120 and the eighth control valve 500 respectively. The eighth control valve 500 is configured to control whether the fourteenth flow channel 620 is connected to or not connected to the outlet of the cooling tower 400.

[0154] Water flowing out of ice storage tank 210 flows through eleventh channel 281, tenth channel 262, twelfth channel 282 and thirteenth channel 610 to fourth channel 222.

[0155] When the eighth control valve 500 is disconnected and the ninth control valve 700 is connected, the cooling water in the condenser 120 enters the cooling tower 400 for cooling, and the cooled water enters the condenser 120 through the ninth control valve 700.

[0156] When the eighth control valve 500 is connected and the ninth control valve 700 is disconnected, the cooling water in the condenser 120 enters the cooling tower 400 for cooling. After cooling, the cooling water enters the fourteenth flow channel 620 through the eighth control valve 500 for further cooling, and then enters the condenser 120.

[0157] It should be noted that the cooling water and refrigerant in the condenser 120 are located in different flow channels and exchange heat to reduce the temperature of the refrigerant.

[0158] See Figure 3 As shown, in some embodiments, the refrigeration device 100 also includes an economizer 1100.

[0159] The economizer 1100 is provided with a separate fifteenth flow channel 1101 and a sixteenth flow channel 1102. The fifteenth flow channel 1101 is connected to the third expansion valve 1110 and the compressor 110 respectively. The third expansion valve 1110 is connected to the condenser 120. The sixteenth flow channel 1102 is connected to the condenser 120 and the ninth flow channel 261 respectively.

[0160] When the third expansion valve 1110 opens, part of the refrigerant in the condenser 120 is throttled by the third expansion valve 1110 and enters the fifteenth flow channel 1101, and then enters the compressor 110. The remaining refrigerant enters the ninth flow channel 261 through the sixteenth flow channel 1102. In this way, the compressor 110 can achieve two-stage compression and improve efficiency through the economizer 1100.

[0161] When the third expansion valve 1110 is closed, the refrigerant in the condenser 120 enters the ninth flow channel 261 through the sixteenth flow channel 1102.

[0162] Figure 4This is a schematic diagram of the flow direction of the first mode of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application.

[0163] See Figure 4 As shown, in the ice-making mode of the ice-making device, the first expansion valve 140 is connected, the second expansion valve 190 is connected, the third expansion valve 1110 is connected, the first control valve 160 is disconnected, the second control valve 170 is disconnected, the third control valve 180 is disconnected, the fourth control valve 230 is connected, the fifth control valve 320 is disconnected, the sixth control valve 330 is disconnected, the seventh control valve 270 is disconnected, the eighth control valve 500 is connected, and the ninth control valve 700 is disconnected.

[0164] In this process, refrigerant from compressor 110 enters condenser 120. A portion of the refrigerant flowing out of condenser 120 is throttled by third expansion valve 1110 and enters fifteenth flow channel 1101, then into compressor 110. The remaining refrigerant enters ninth flow channel 261 via sixteenth flow channel 1102. Then, a portion of the refrigerant flowing out of ninth flow channel 261 flows to gas-liquid separator 150 via first expansion valve 140, while the remaining refrigerant enters eighth flow channel via second expansion valve 190, and then flows to gas-liquid separator 150 after being throttled again by first expansion valve 140. After separation by gas-liquid separator 150, a portion of the refrigerant enters compressor 110, while the remaining refrigerant flows back to gas-liquid separator 150 via fourth control valve 230 and third flow channel 221 of second heat exchanger 220.

[0165] Water in ice storage tank 210 flows through eleventh flow channel 281, tenth flow channel 262, twelfth flow channel 282, and thirteenth flow channel 610 to fourth flow channel 222, where it exchanges heat with the refrigerant to keep the water temperature below zero. Subcooled water flowing out of fourth flow channel 222 flows through seventh flow channel and crystallizer 240 back to ice storage tank 210.

[0166] The cooling water in the condenser 120 enters the cooling tower 400 for cooling. After cooling, the cooling water enters the fourteenth flow channel 620 through the eighth control valve 500 for further cooling, and then enters the condenser 120.

[0167] For example, the temperature of water before entering the eleventh flow channel 281 is 0 degrees Celsius, the temperature when flowing out of the eleventh flow channel 281 is 0.2 degrees Celsius, the temperature when flowing out of the tenth flow channel 262 is 0.5 degrees Celsius, the temperature when flowing out of the twelfth flow channel 282 is 0.3 degrees Celsius, the temperature when flowing out of the thirteenth flow channel 610 is 3 degrees Celsius, the temperature when flowing out of the fourth flow channel 222 is -1.5 degrees Celsius, and the temperature when flowing out of the crystallizer 240 is zero degrees Celsius.

[0168] For example, the temperature of the cooling water flowing out of the condenser 120 is 35 degrees Celsius, the temperature of the cooling water flowing out of the cooling tower 400 is 30 degrees Celsius, the temperature of the cooling water flowing into the fourteenth flow channel is 30 degrees Celsius, the temperature of the cooling water flowing out of the fourteenth flow channel is 27 degrees Celsius, and the temperature of the cooling water flowing into the condenser 120 is 27 degrees Celsius.

[0169] Understandably, the use of multiple direct heat exchange methods between the refrigerant and the water in the ice storage tank 210 increases the evaporation temperature (from -5℃ to -3℃ compared to the evaporation temperature of the ethylene glycol subcooled water ice slurry system), thus increasing the cooling capacity. Furthermore, the cooling tower 400, through the second regenerator 600, effectively reduces the cooling water inlet temperature, thereby reducing the power consumption of the compressor 110. Simultaneously, the first regenerator 280 and the second regenerator 600 utilize waste heat to raise the water temperature, effectively preventing ice blockage while increasing the subcooling of the main unit and improving unit efficiency. Compared to using electric heating or other methods to prevent ice blockage, this reduces additional energy consumption.

[0170] Figure 5 This is a schematic diagram of the flow direction in the second mode of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application.

[0171] See Figure 5 As shown, in the refrigeration mode of the refrigeration device, the first expansion valve 140 is connected, the second expansion valve 190 is disconnected, the third expansion valve 1110 is connected, the first control valve 160 is connected, the second control valve 170 is connected, the third control valve 180 is connected, the fourth control valve 230 is disconnected, the fifth control valve 320 is disconnected, the sixth control valve 330 is disconnected, the seventh control valve 270 is connected, the eighth control valve 500 is disconnected, and the ninth control valve 700 is connected.

[0172] Refrigerant in compressor 110 enters condenser 120. A portion of the refrigerant flowing out of condenser 120 is throttled by third expansion valve 1110 and enters fifteenth flow channel 1101, then into compressor 110. The remaining refrigerant flows through sixteenth flow channel 1102, seventh control valve 270, and first expansion valve 140 to gas-liquid separator 150. After separation in gas-liquid separator 150, a portion of the refrigerant enters compressor 110, while the remaining refrigerant flows back to gas-liquid separator 150 via first control valve 160 and first flow channel 131 of first heat exchanger 130.

[0173] The return water from the user terminal enters the second flow channel 132 through the second control valve 170 and exchanges heat with the refrigerant in the first flow channel 131. After the temperature of the return water from the user terminal decreases, it flows to the terminal water supply (supply to the user terminal) through the third control valve 180.

[0174] The cooling water in the condenser 120 enters the cooling tower 400 for cooling, and the cooled water then enters the condenser 120 through the ninth control valve 700.

[0175] Understandably, the user-side chilled water system directly exchanges heat with the refrigerant of the refrigeration unit 100, which increases the evaporation temperature (from -5℃ to 6℃ compared to the evaporation temperature of the ethylene glycol system), thereby improving the cooling capacity and increasing the operating efficiency of the main unit.

[0176] Figure 6 This is a schematic diagram of the flow direction in the third mode of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application.

[0177] See Figure 6 As shown, in the cooling mode of the ice-melting device, the first expansion valve 140 is disconnected, the second expansion valve 190 is disconnected, the third expansion valve 1110 is disconnected, the first control valve 160 is disconnected, the second control valve 170 is disconnected, the third control valve 180 is disconnected, the fourth control valve 230 is disconnected, the fifth control valve 320 is connected, the sixth control valve 330 is connected, the seventh control valve 270 is disconnected, the eighth control valve 500 is disconnected, and the ninth control valve 700 is disconnected.

[0178] Ice slurry in ice storage tank 210 flows back to ice storage tank 210 via the fifth flow channel 311 of the third heat exchanger 310. User terminal return water flows through the fifth control valve 320 to the sixth flow channel 312 to exchange heat with the ice slurry in the fifth flow channel 311. After the temperature of the user terminal return water decreases, it flows through the sixth control valve 330 to the terminal water supply (supply to the user terminal).

[0179] Understandably, storing cooling capacity under off-peak / parity electricity prices and supplying it to users under peak electricity prices can achieve cost savings on electricity and balance the grid load. In the ice-melting cooling mode, the refrigeration unit 100 does not operate. The ice-melting unit uses ice slurry supplied by the ice-melting pump 340 to cool the user's terminal water to a suitable temperature, thus achieving the purpose of cooling.

[0180] Figure 7 This is a schematic diagram of the flow direction of the fourth mode of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application.

[0181] See Figure 7 As shown, in the mode where the refrigeration unit is refrigerating and the ice-making unit is making ice, the first expansion valve 140 is connected, the second expansion valve 190 is connected, the third expansion valve 1110 is connected, the first control valve 160 is connected, the second control valve 170 is connected, the third control valve 180 is connected, the fourth control valve 230 is connected, the fifth control valve 320 is disconnected, the sixth control valve 330 is disconnected, the seventh control valve 270 is disconnected, the eighth control valve 500 is connected, and the ninth control valve 700 is disconnected.

[0182] In this process, the refrigerant in compressor 110 enters condenser 120. A portion of the refrigerant flowing out of condenser 120 is throttled by third expansion valve 1110 and enters fifteenth flow channel 1101, then enters compressor 110. The remaining refrigerant enters ninth flow channel 261 via sixteenth flow channel 1102. Then, a portion of the refrigerant flowing out of ninth flow channel 261 flows to gas-liquid separator 150 via first expansion valve 140, while the remaining refrigerant enters eighth flow channel via second expansion valve 190, and then flows to gas-liquid separator 150 after being throttled again by first expansion valve 140. After being separated by the gas-liquid separator 150, part of the refrigerant enters the compressor 110, part of the refrigerant flows back to the gas-liquid separator 150 through the first control valve 160 and the first flow channel 131 of the first heat exchanger 130, and the remaining part of the refrigerant flows back to the gas-liquid separator 150 through the fourth control valve 230 and the third flow channel 221 of the second heat exchanger 220.

[0183] The return water from the user terminal enters the second flow channel 132 through the second control valve 170 and exchanges heat with the refrigerant in the first flow channel 131. After the temperature of the return water from the user terminal decreases, it flows to the terminal water supply (supply to the user terminal) through the third control valve 180.

[0184] Water in ice storage tank 210 flows through eleventh flow channel 281, tenth flow channel 262, twelfth flow channel 282, and thirteenth flow channel 610 to fourth flow channel 222, where it exchanges heat with the refrigerant to keep the water temperature below zero. Subcooled water flowing out of fourth flow channel 222 flows through seventh flow channel and crystallizer 240 back to ice storage tank 210.

[0185] The cooling water in the condenser 120 enters the cooling tower 400 for cooling. After cooling, the cooling water enters the fourteenth flow channel 620 through the eighth control valve 500 for further cooling, and then enters the condenser 120.

[0186] It should be noted that the refrigerant flow rate is adjusted by controlling the opening of the first control valve 160 and the fourth control valve 230 (furthermore, the valve opening can be controlled by installing temperature sensors on the pipeline and using temperature feedback in conjunction with PID (Proportional-Integral-Derivative Control) to respond to load demand in a timely manner), thereby enabling the refrigeration unit 100 to supply different proportions of cooling capacity to the user side and the ice storage tank 210.

[0187] Figure 8 This is a schematic diagram of the flow direction in the fifth mode of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application.

[0188] See Figure 8As shown, in the combined cooling mode of the refrigeration unit and the ice-melting unit, the first expansion valve 140 is connected, the second expansion valve 190 is disconnected, the third expansion valve 1110 is connected, the first control valve 160 is connected, the second control valve 170 is connected, the third control valve 180 is connected, the fourth control valve 230 is disconnected, the fifth control valve 320 is connected, the sixth control valve 330 is connected, the seventh control valve 270 is connected, the eighth control valve 500 is disconnected, and the ninth control valve 700 is connected.

[0189] Refrigerant in compressor 110 enters condenser 120. A portion of the refrigerant flowing out of condenser 120 is throttled by third expansion valve 1110 and enters fifteenth flow channel 1101, then enters compressor 110. The remaining refrigerant flows through sixteenth flow channel 1102, seventh control valve 270, and first expansion valve 140 to gas-liquid separator 150. After separation by gas-liquid separator 150, some refrigerant enters compressor 110, while some refrigerant flows back to gas-liquid separator 150 through first control valve 160 and first flow channel 131 of first heat exchanger 130. User-end return water enters second flow channel 132 through second control valve 170 to exchange heat with the refrigerant in first flow channel 131. After the user-end return water temperature decreases, it flows through third control valve 180 to supply water to the user end. Ice slurry in ice storage tank 210 flows back to ice storage tank 210 via the fifth flow channel 311 of the third heat exchanger 310. User-end return water flows through the fifth control valve 320 to the sixth flow channel 312 to exchange heat with the ice slurry in the fifth flow channel 311. After the user-end return water temperature decreases, it flows through the sixth control valve 330 to the end-user water supply. Cooling water in condenser 120 enters cooling tower 400 for cooling. The cooled water then enters condenser 120 via the ninth control valve 700.

[0190] The refrigeration unit 100 and the ice-melting unit work together to provide cooling for users. The evaporation temperature of the refrigeration unit 100 can reach 6°C. In the combined cooling mode, the user's cooling needs can still be met even when the ice-melting unit's capacity is insufficient.

[0191] Figure 9 This is a flowchart illustrating the control method for a direct expansion subcooled water dynamic ice slurry system provided in an embodiment of this application.

[0192] See Figure 9 As shown, this application provides a control method for a direct expansion subcooled water dynamic ice slurry system, used in the aforementioned direct expansion subcooled water dynamic ice slurry system. The method includes:

[0193] S101. When the grid load is at its lowest, the direct expansion subcooled water dynamic ice slurry system operates in at least one of the following modes: refrigeration mode (refrigeration unit cooling), mode (refrigeration unit cooling and ice-making unit ice-making), mode (refrigeration unit and ice-melting unit jointly supplying cooling), and mode (ice-making unit ice-making). It should be noted that the electricity price during the grid load low period is off-peak electricity.

[0194] S102. When the grid load is at its flat point, the direct expansion subcooled water dynamic ice slurry system operates in at least one of the following modes: refrigeration mode (refrigeration unit cooling), mode (refrigeration unit cooling and ice-making unit ice-making), mode (refrigeration unit and ice-melting unit jointly supplying cooling), and mode (ice-making unit ice-making). It should be noted that when the grid load is at its flat point, the electricity is at grid parity.

[0195] S103. When the power grid load is at its peak, the direct expansion subcooled water dynamic ice slurry system operates in at least one of the following modes: ice melting device cooling mode, combined cooling mode of refrigeration device and ice melting device, and cooling mode of refrigeration device.

[0196] It should be noted that peak electricity prices are in effect when the grid load is at its peak.

[0197] In the ice-making mode of the ice-making device, the first expansion valve 140 is connected, the first control valve 160 is disconnected, the second control valve 170 is disconnected, the third control valve 180 is disconnected, the fourth control valve 230 is connected, the fifth control valve 320 is disconnected, and the sixth control valve 330 is disconnected.

[0198] In the refrigeration mode of the refrigeration unit, the first expansion valve 140 is connected, the first control valve 160 is connected, the second control valve 170 is connected, the third control valve 180 is connected, the fourth control valve 230 is disconnected, the fifth control valve 320 is disconnected, and the sixth control valve 330 is disconnected.

[0199] In the cooling mode of the ice melting device, the first expansion valve 140 is disconnected, the first control valve 160 is disconnected, the second control valve 170 is disconnected, the third control valve 180 is disconnected, the fourth control valve 230 is disconnected, the fifth control valve 320 is connected, and the sixth control valve 330 is connected.

[0200] In the mode where the refrigeration unit is refrigerating and the ice-making unit is making ice, the first expansion valve 140 is connected, the first control valve 160 is connected, the second control valve 170 is connected, the third control valve 180 is connected, the fourth control valve 230 is connected, the fifth control valve 320 is disconnected, and the sixth control valve 330 is disconnected.

[0201] In the combined cooling mode of the refrigeration unit and the ice-melting unit, the first expansion valve 140 is connected, the first control valve 160 is connected, the second control valve 170 is connected, the third control valve 180 is connected, the fourth control valve 230 is disconnected, the fifth control valve 320 is connected, and the sixth control valve 330 is connected.

[0202] It is understandable that using different operating modes during off-peak, flat, and peak electricity periods can save on electricity costs.

[0203] Figure 10 This is a schematic diagram of the process for obtaining the predicted value of the user-side cooling load on the day in the control method of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application.

[0204] See Figure 10 As shown, obtaining the predicted user-side cooling load for the day includes:

[0205] S201. Collect the first data, which is the building's historical cooling load.

[0206] S202. Collect the second data, which is the real-time cooling load of the previous day.

[0207] S203. Output the predicted cooling load value for the day based on the first and second data.

[0208] It should be noted that the user-side cooling load prediction module builds a load prediction model based on the historical load data of the current building, and then corrects the predicted cooling load for the current day based on the real-time user-side cooling load of the previous day. The algorithm model can be any commonly used algorithm in related technologies, and this embodiment does not impose specific limitations. The first submodule collects and acquires the building's historical cooling load. The second submodule builds a building cooling load prediction model based on the collected historical cooling load data to achieve building cooling load prediction. The third submodule corrects the prediction model based on the real-time cooling load collected the day before. The user-side cooling load prediction module outputs the user-side cooling load that will occur at each time period of the day.

[0209] Figure 11 This is a schematic diagram of the process for obtaining the liquid level of the ice storage tank in the control method of the direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application.

[0210] See Figure 11 As shown, obtaining the liquid level in the ice storage tank includes:

[0211] S301. Determine the ice volume in the ice storage tank using the first and second level gauges.

[0212] S302. If the first level gauge and the second level gauge detect the ice slurry level, a feedback signal will be sent indicating that the ice storage tank is full.

[0213] S303. If the first level gauge does not detect the ice slurry level, but the second level gauge does detect the ice slurry level, a feedback signal will be sent indicating that the ice storage tank is empty.

[0214] The first level gauge is installed at the top of the tank, and the second level gauge can be installed at the outlet of the ice slurry delivery pipe (bottom of the tank). When both the first and second level gauges detect the ice slurry level, they send a feedback signal that the ice storage tank is full. When the first level gauge does not detect the ice slurry level, but the second level gauge does, it sends a feedback signal that the ice storage tank is empty.

[0215] Figure 12 This is a schematic diagram of the control method for a direct expansion subcooled water dynamic ice slurry system provided in the embodiments of this application when the power grid load is at a low point.

[0216] See Figure 12 As shown, in some embodiments, when the grid load is at a low point, the predicted value of the user-side cooling load, the liquid level of the ice storage tank, and the cooling capacity of the refrigeration unit for the day are obtained and a judgment is made.

[0217] If the predicted cooling load on the user side is 0 and the liquid level is 100 on the day, then the operation will be terminated.

[0218] If the predicted user-side cooling load for the day is 0 and the liquid level is not 100, then the ice-making device will operate in ice-making mode.

[0219] If the predicted user-side cooling load for the day is not equal to 0, then determine whether the cooling capacity is not less than the predicted user-side cooling load for the day.

[0220] If the liquid level is 100 and the cooling capacity is not less than the predicted cooling load on the user side for the day, then the refrigeration unit will operate in cooling mode.

[0221] If the liquid level is 100 and the cooling capacity is less than the predicted cooling load on the user side for the day, then the refrigeration unit and the ice-melting unit will operate in a combined cooling mode.

[0222] If the liquid level is not equal to 100 and the cooling capacity is not less than the predicted cooling load on the user side for the day, then the refrigeration unit will operate in a mode where it cools and the ice-making unit makes ice.

[0223] If the liquid level is not equal to 100, the cooling capacity is less than the predicted cooling load on the user side for the day, and the liquid level is not equal to 0, then the refrigeration unit and the ice melting unit will operate in a combined cooling mode.

[0224] If the liquid level is not equal to 100, the cooling capacity is less than the predicted cooling load on the user side for the day, and the liquid level is equal to 0, then the refrigeration unit will operate in cooling mode.

[0225] The ice-making device operates in the following modes: Mode 1 (ice-making); Mode 2 (refrigeration); Mode 3 (ice-melting); Mode 4 (refrigeration and ice-making); and Mode 5 (combined cooling). The cooling capacity Q1 of the refrigeration unit is its rated capacity and is a fixed value. The daily user-side cooling load forecast Q2 is calculated using a computational model. The ice storage tank level Q3 is provided by feedback from the first and second level gauges. When the first and second level gauges detect ice slurry levels, they send a feedback signal indicating the ice storage tank is full, and Q2 is 100. When the first level gauge does not detect ice slurry levels, but the second level gauge does, it sends a feedback signal indicating the ice storage tank is empty, and Q2 is 0. The units for the daily user-side cooling load forecast and cooling capacity are watts.

[0226] Figure 13 This is a flowchart illustrating the control method for a direct expansion subcooled water dynamic ice slurry system provided in this application embodiment when the grid load is at a flat level.

[0227] See Figure 13 As shown, in some embodiments, when the grid load is at a flat level, the predicted value of the user-side cooling load for the day, the liquid level of the ice storage tank, and the cooling capacity of the refrigeration unit are obtained and judged, including:

[0228] If the predicted cooling load on the user side is 0 and the liquid level is 100 on the day, then the operation will be terminated.

[0229] If the predicted user-side cooling load for the day is 0 and the liquid level is not 100, then the ice-making device will operate in ice-making mode.

[0230] If the predicted user-side cooling load is not equal to 0 and the liquid level is equal to 0, then the refrigeration unit will operate in cooling mode.

[0231] If the predicted user-side cooling load for the day is not equal to 0, the liquid level is not equal to 0 and not equal to 100, and the cooling capacity is not less than the predicted user-side cooling load for the day, the refrigeration unit will refrigerate and the ice-making unit will make ice.

[0232] If the predicted user-side cooling load for the day is not equal to 0, the liquid level is not equal to 0, and the cooling capacity is less than the predicted user-side cooling load for the day, then the refrigeration unit and the ice-melting unit will operate in a combined cooling mode.

[0233] The ice-making device operates in the following modes: Mode 1 (ice-making); Mode 2 (refrigeration); Mode 3 (ice-melting); Mode 4 (refrigeration and ice-making); and Mode 5 (combined cooling). The cooling capacity Q1 of the refrigeration unit is its rated capacity and is a fixed value. The daily user-side cooling load forecast Q2 is calculated using a computational model, and the ice storage tank level Q3 is provided by feedback from the first and second level gauges. The units for both the daily user-side cooling load forecast and the cooling capacity are watts.

[0234] Figure 14 A flowchart illustrating the control method for a direct expansion subcooled water dynamic ice slurry system provided in this application embodiment when the power grid load is at its peak.

[0235] See Figure 14 As shown, in some embodiments, when the grid load is at its peak, the predicted value of the user-side cooling load for the day, the liquid level of the ice storage tank, and the cooling capacity of the refrigeration unit are obtained and a judgment is made, including:

[0236] If the predicted user-side cooling load for the day is 0, then operation will cease.

[0237] If the predicted user-side cooling load is not equal to 0 and the liquid level is equal to 0, then the refrigeration unit will operate in cooling mode.

[0238] If the predicted user-side cooling load and liquid level are not equal to 0, and the cooling capacity that the ice-melting device can provide under full load is not less than the predicted user-side cooling load, then the ice-melting device will be operated in cooling mode.

[0239] If the predicted user-side cooling load and liquid level are not equal to 0, and the cooling capacity that the ice-melting device can provide under full load is less than the predicted user-side cooling load, then the refrigeration device and the ice-melting device will operate in a combined cooling mode.

[0240] The ice-making device operates in the following modes: Mode 1 (ice-making); Mode 2 (refrigeration); Mode 3 (ice-melting); Mode 4 (refrigeration and ice-making); and Mode 5 (combined cooling). The cooling capacity Q1 of the refrigeration device is its rated capacity and is a fixed value. The daily user-side cooling load forecast Q2 is calculated using a computational model, and the ice storage tank level Q3 is provided by feedback from the first and second level gauges. The cooling capacity provided by the ice-melting device under full load is a fixed value, its rated capacity, determined by the device's structure, such as the ice storage tank's capacity. The units for the daily user-side cooling load forecast, cooling capacity, and the cooling capacity provided by the ice-melting device under full load are watts. Understandably, by responding to time-of-use pricing and implementing different controls based on peak, valley, and flat pricing, the priority design of entering different operating modes achieves efficient and energy-saving operation of the entire air conditioning system, reducing electricity costs for users.

[0241] Figure 15 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this application.

[0242] See Figure 15 As shown, this application provides an air conditioner 800, including an air conditioner body 810 and a direct expansion subcooled water dynamic ice slurry system 900, wherein the air conditioner body 810 is connected to the direct expansion subcooled water dynamic ice slurry system 900. The air conditioner body 810 includes an indoor section and an outdoor section. Exemplarily, the indoor section includes an indoor casing and an indoor fan. The outdoor section includes an outdoor casing and an outdoor fan. It should be noted that the air conditioner may include more or fewer structures than described above, such as dehumidification devices or sterilization devices, etc. This embodiment does not specifically limit the structure of the air conditioner.

[0243] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0244] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A direct expansion subcooled water dynamic ice slurry system, characterized in that, include: Refrigeration unit (100), comprising: Compressor (110); The condenser (120) is connected to the compressor (110); The first heat exchanger (130) is provided with a first flow channel (131) and a second flow channel (132) that are separated; The first expansion valve (140) is connected to the condenser (120); The gas-liquid separator (150) is connected to the first expansion valve (140) and the compressor (110) respectively; The first flow channel (131) is connected to the first control valve (160), which is configured to control whether the first flow channel (131) is connected to or not connected to the gas-liquid separator (150). The second flow channel (132) is connected to the second control valve (170) and the third control valve (180) respectively. The second control valve (170) is configured to control whether the second flow channel (132) is connected to or not connected to the end return water, and the third control valve (180) is configured to control whether the second flow channel (132) is connected to or not connected to the end water supply. Ice-making apparatus (200), comprising: Ice storage tank (210); The second heat exchanger (220) is provided with a separated third flow channel (221) and a fourth flow channel (222); the third flow channel (221) is connected to a fourth control valve (230), which is configured to control whether the third flow channel (221) is connected to or not connected to the gas-liquid separator (150); The crystallizer (240) is connected to the fourth flow channel (222) and the ice storage tank (210), respectively; An ice-melting device (300) includes: The third heat exchanger (310) is provided with a separated fifth flow channel (311) and a sixth flow channel (312). The fifth flow channel (311) is connected to the ice storage tank (210), and the sixth flow channel (312) is connected to the fifth control valve (320) and the sixth control valve (330) respectively. The fifth control valve (320) is configured to control whether the sixth flow channel (312) is connected to or not connected to the terminal return water, and the sixth control valve (330) is configured to control whether the sixth flow channel (312) is connected to or not connected to the terminal supply water.

2. The direct expansion subcooled water dynamic ice slurry system according to claim 1, characterized in that, The ice-making device (200) includes: An anti-propagation device (250) is located between the second heat exchanger (220) and the crystal promoter (240). The anti-propagation device (250) is provided with a separated seventh flow channel and an eighth flow channel. The seventh flow channel is connected to the fourth flow channel (222) and the crystal promoter (240) respectively. The eighth flow channel is connected to the first expansion valve (140) and the second expansion valve (190) respectively. The second expansion valve (190) is connected to the condenser (120).

3. The direct expansion subcooled water dynamic ice slurry system according to claim 2, characterized in that, The ice-making device (200) includes: A refrigerant subcooler (260) is provided with a separated ninth flow channel (261) and a tenth flow channel (262). The ninth flow channel (261) is connected to the condenser (120), the first expansion valve (140) and the second expansion valve (190) respectively. The tenth flow channel (262) is connected to the ice storage tank (210) and the fourth flow channel (222) respectively. The seventh control valve (270) is connected in parallel with the ninth flow channel (261) and is connected to the condenser (120), the first expansion valve (140) and the second expansion valve (190) respectively.

4. The direct expansion subcooled water dynamic ice slurry system according to claim 3, characterized in that, The ice-making device (200) includes: The first regenerator (280) is provided with a separated eleventh flow channel (281) and twelfth flow channel (282). The eleventh flow channel (281) is connected to the ice storage tank (210) and the tenth flow channel (262) respectively, and the twelfth flow channel (282) is connected to the tenth flow channel (262) and the fourth flow channel (222) respectively.

5. The direct expansion subcooled water dynamic ice slurry system according to claim 4, characterized in that, Also includes: A cooling tower (400) has its inlet connected to the condenser (120) and its outlet connected to a ninth control valve (700), which is configured to control whether the outlet of the cooling tower (400) is connected to or not connected to the condenser (120). The second regenerator (600) is provided with a separated thirteenth flow channel (610) and a fourteenth flow channel (620). The thirteenth flow channel (610) is connected to the fourth flow channel (222) and the twelfth flow channel (282) respectively. The fourteenth flow channel (620) is connected to the condenser (120) and the eighth control valve (500) respectively. The eighth control valve (500) is configured to control whether the fourteenth flow channel (620) is connected to or not connected to the outlet of the cooling tower (400).

6. The direct expansion subcooled water dynamic ice slurry system according to claim 3, characterized in that, The refrigeration device (100) further includes an economizer (1100), which is provided with a separated fifteenth flow channel (1101) and a sixteenth flow channel (1102). The fifteenth flow channel (1101) is connected to the third expansion valve (1110) and the compressor (110) respectively. The third expansion valve (1110) is connected to the condenser (120). The sixteenth flow channel (1102) is connected to the condenser (120) and the ninth flow channel (261) respectively.

7. A control method for a direct expansion subcooled water dynamic ice slurry system, characterized in that, The method for the direct expansion subcooled water dynamic ice slurry system according to any one of claims 1 to 6 comprises: When the grid load is at its lowest, the direct expansion subcooled water dynamic ice slurry system operates in at least one of the following modes: refrigeration mode of the refrigeration unit, refrigeration mode of the refrigeration unit and ice-making mode, refrigeration mode of the refrigeration unit and ice-melting mode of the ice-making mode. When the grid load is at a flat level, the direct expansion subcooled water dynamic ice slurry system operates in at least one of the following modes: refrigeration mode of the refrigeration unit, refrigeration mode of the refrigeration unit and ice-making mode, refrigeration mode of the refrigeration unit and ice-melting mode of the ice-making mode. When the grid load is at its peak, the direct expansion subcooled water dynamic ice slurry system operates in at least one of the following modes: ice melting device cooling mode, combined cooling mode of refrigeration device and ice melting device, and refrigeration mode of refrigeration device. In the ice-making mode of the ice-making device, the first expansion valve is connected, the first control valve is disconnected, the second control valve is disconnected, the third control valve is disconnected, the fourth control valve is connected, the fifth control valve is disconnected, and the sixth control valve is disconnected. In the refrigeration mode of the refrigeration device, the first expansion valve is connected, the first control valve is connected, the second control valve is connected, the third control valve is connected, the fourth control valve is disconnected, the fifth control valve is disconnected, and the sixth control valve is disconnected. In the cooling mode of the ice melting device, the first expansion valve is disconnected, the first control valve is disconnected, the second control valve is disconnected, the third control valve is disconnected, the fourth control valve is disconnected, the fifth control valve is connected, and the sixth control valve is connected. In the mode where the refrigeration unit is refrigerating and the ice-making unit is making ice, the first expansion valve is connected, the first control valve is connected, the second control valve is connected, the third control valve is connected, the fourth control valve is connected, the fifth control valve is disconnected, and the sixth control valve is disconnected. In the combined cooling mode of the refrigeration unit and the ice-melting unit, the first expansion valve is connected, the first control valve is connected, the second control valve is connected, the third control valve is connected, the fourth control valve is disconnected, the fifth control valve is connected, and the sixth control valve is connected.

8. The control method for the direct expansion subcooled water dynamic ice slurry system according to claim 7, characterized in that, When the grid load is at its lowest point, the predicted value of the user-side cooling load, the liquid level of the ice storage tank, and the cooling capacity of the refrigeration unit for the day are obtained and a judgment is made. If the predicted user-side cooling load for the day is 0 and the liquid level is 100, then the operation will end. If the predicted user-side cooling load for the day is equal to 0 and the liquid level is not equal to 100, then the ice-making device will be operated in ice-making mode. If the predicted value of the user-side cooling load for the day is not equal to 0, then determine whether the cooling capacity is not less than the predicted value of the user-side cooling load for the day. If the liquid level is equal to 100 and the cooling capacity is not less than the predicted cooling load on the user side for the day, then the refrigeration unit will be operated in cooling mode. If the liquid level is equal to 100 and the cooling capacity is less than the predicted cooling load on the user side for the day, then the refrigeration unit and the ice-melting unit will be used in a combined cooling mode. If the liquid level is not equal to 100 and the cooling capacity is not less than the predicted value of the user-side cooling load for the day, then the mode of running the refrigeration unit for cooling and the ice-making unit for ice-making is adopted. If the liquid level is not equal to 100, the cooling capacity is less than the predicted cooling load on the user side for the day, and the liquid level is not equal to 0, then the refrigeration unit and the ice melting unit will be used in a combined cooling mode. If the liquid level is not equal to 100, the cooling capacity is less than the predicted user-side cooling load for the day, and the liquid level is equal to 0, then the refrigeration unit will operate in cooling mode.

9. The control method for the direct expansion subcooled water dynamic ice slurry system according to claim 7, characterized in that, When the grid load is at a flat level, obtain the predicted value of the user-side cooling load, the liquid level of the ice storage tank, and the cooling capacity of the refrigeration device for the day and make a judgment. If the predicted user-side cooling load for the day is 0 and the liquid level is 100, then the operation will end. If the predicted user-side cooling load for the day is equal to 0 and the liquid level is not equal to 100, then the ice-making device will be operated in ice-making mode. If the predicted user-side cooling load for the day is not equal to 0 and the liquid level is equal to 0, then the refrigeration unit will operate in cooling mode. If the predicted user-side cooling load for the day is not equal to 0, the liquid level is not equal to 0 and not equal to 100, and the cooling capacity is not less than the predicted user-side cooling load for the day, the mode is that the refrigeration unit cools and the ice-making unit makes ice. If the predicted user-side cooling load for the day is not equal to 0, the liquid level is not equal to 0, and the cooling capacity is less than the predicted user-side cooling load for the day, then the refrigeration unit and the ice-melting unit will operate in a combined cooling mode.

10. The control method for the direct expansion subcooled water dynamic ice slurry system according to claim 7, characterized in that, When the grid load is at its peak, the predicted value of the user-side cooling load, the liquid level of the ice storage tank, and the cooling capacity of the refrigeration device are obtained and judged. If the predicted user-side cooling load for the day is equal to 0, then the operation will end. If the predicted user-side cooling load for the day is not equal to 0 and the liquid level is equal to 0, then the refrigeration unit will operate in cooling mode. If the predicted user-side cooling load for the day is not equal to 0, the liquid level is not equal to 0, and the cooling capacity provided by the ice-melting device under full load is not less than the predicted user-side cooling load for the day, then the ice-melting device will be operated in cooling mode. If the predicted user-side cooling load for the day is not equal to 0, the liquid level is not equal to 0, and the cooling capacity provided by the ice-melting device under full load is less than the predicted user-side cooling load for the day, then the refrigeration device and the ice-melting device will operate in a combined cooling mode.

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