Efficient ice slurry cold storage air conditioning system and regulation and control method

Abstract

The invention relates to the technical field of ice slurry cold storage systems, in particular to an efficient ice slurry cold storage air conditioning system and a regulation and control method. A supercooled water system is optimized, a filter and a heat regenerator are combined into an integrated filter and heat regenerator, and water with ice crystal temperature rise eliminated is used for exchanging heat with ice slurry; on one hand, preheating of ice slurry is achieved, on the other hand, water without ice crystals can be cooled, and the occupied space of the equipment is reduced through the integrated design. The liquid storage evaporation tank is arranged between the evaporators, hot fluorine returns to the liquid storage evaporation tank after ice melting and ice blockage removal through the evaporators, the hot fluorine and a gaseous refrigerant return to the compressor together to achieve circulation, supercooled water heated by the integrated filter and heat regenerator can flow through the liquid storage evaporation tank to be preheated, temperature rise can occur in the process, and the supercooled water is heated. Ice crystals in supercooled water are eliminated, the risk of ice blockage in the evaporator is greatly reduced, and the stability of the whole refrigerating system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ice slurry thermal energy storage systems, and particularly to an efficient ice slurry thermal energy storage air conditioning system and a control method therefor. Background Art

[0002] Energy storage is one of the key technologies to solve the volatility and randomness of renewable power generation. Compared with various energy storage methods such as electrochemical energy storage and compressed air energy storage, thermal energy storage with ice slurry has the characteristics of low cost, high energy storage density, long service life, etc., and has important application value for suppressing the peak-valley difference of power load caused by large building air conditioning and industrial and commercial refrigeration, and large-scale consumption of electricity generated by renewable energy. Latent heat energy storage is to store the heat energy absorbed or released when a substance undergoes a phase change, while sensible heat energy storage is to store the heat energy absorbed or released when the temperature of a substance changes. For example, when the temperature of every 1 kg of water changes by 1 °C, it absorbs or releases 1 kcal of heat to the outside world, which is the sensible heat and is sensible heat energy storage; while when every 1 kg of 0 °C ice undergoes a phase change and melts into 0 °C water, it needs to absorb 80 kcal of heat, which is latent heat energy storage. Obviously, the latent heat energy (phase change temperature) of the same substance is much higher than the sensible heat energy storage amount (1 °C) temperature difference. Therefore, the use of latent heat thermal energy storage - ice thermal energy storage method will greatly reduce the amount of medium and the volume of equipment.

[0003] The common traditional ice thermal energy storage method is the coil type ice thermal energy storage air conditioner - combining the ice thermal energy storage technology and the air conditioning system, storing ice at night using valley electricity, and storing the cold energy in the low-temperature ice; releasing the cold energy by melting ice during the peak electricity consumption period during the day, which can not only achieve "peak shaving and valley filling", but also improve the consumption ratio of renewable energy under unfavorable conditions. However, it is difficult for the coil type ice thermal energy storage system to avoid the characteristic of water density reversal at 4.0 °C. Since the water density reversal has a great impact on the flow characteristics and heat transfer mechanism in the ice storage unit, obvious temperature stratification phenomenon is formed in the ice storage unit by water, resulting in uneven ice formation thickness on the upper and lower surfaces of the coil. At the same time, natural convection will also lead to an extension of the ice storage time.

[0004] To solve the problems existing in the traditional ice storage method, a new ice storage method - ice slurry storage is adopted. Due to the large latent heat of fusion of ice crystals, ice slurry has a large cold storage density; at the same time, due to the large heat transfer area of ice crystals, it has a fast cooling rate and good temperature regulation characteristics. Different from the traditional coil type (internal melt ice, external melt ice) and encapsulated type (ice balls, ice slabs) ice storage systems where ice condenses on the wall of the heat exchanger, increasing the heat transfer thermal resistance of the ice layer and resulting in low heat transfer efficiency. Due to high evaporation temperature, large cold storage density and high cold release rate, the ice slurry storage energy system has unique advantages in consuming renewable electricity compared with other ice storage systems. However, when the existing ice slurry storage system uses supercooled water to produce ice slurry, ice blockage often occurs due to the freezing of supercooled water in the unit. To eliminate the ice blockage problem in the unit, there is a large amount of cold and heat offset. The energy consumption of the supercooled water releasing supercooling during the crystal nucleation process is also relatively high. It is difficult to produce ice slurry with a high ice content rate (IPF) and reduce the agglomeration that occurs during the long-term storage of ice slurry. Moreover, there is a lack of high-reliability design and control technologies for ice slurry storage systems for flexible electricity use and demand response.

[0005] When the existing ice slurry storage system uses supercooled water to produce ice slurry, ice blockage often occurs due to the freezing of supercooled water in the unit. The existing main method to eliminate residual microcrystals and inhomogeneities in water is electric heating for ice melting. Although heating supercooled water to a high enough temperature and maintaining it for a long enough time can ensure complete elimination of ice blockage inside the evaporator, the excessive temperature causes most of the cold energy to be used to offset the influence of the temperature rise after being heated by the external heat source, rather than being used for the subcooling ice making of water, resulting in a 15%-20% reduction in the system energy efficiency and causing cold energy waste. Summary of the Invention

[0006] The object of the present invention is to solve the above deficiencies and provide an efficient ice slurry storage air conditioning system and control method.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions: An efficient ice slurry storage air conditioning system, comprising:

[0008] An integrated filtration and heat recovery device, used to filter large particle ice crystals in the ice slurry to obtain supercooled water and heat up the obtained supercooled water;

[0009] A liquid storage evaporation tank, connected to the integrated filtration and heat recovery device through a pipeline, used to further heat up the water after temperature rise until the ice crystals are completely eliminated, and send the water after eliminating ice crystals to the integrated filtration and heat recovery device for heat exchange and cooling;

[0010] An evaporator, connected to the integrated filtration and heat recovery device through a pipeline, used to further cool down the supercooled water after heat exchange and cooling by the integrated filtration and heat recovery device;

[0011] A crystal nucleator, used to induce phase change in the supercooled water after being cooled by the evaporator;

[0012] The ice storage tank is used to store ice slurry after the phase change is triggered by the crystal promoter.

[0013] Furthermore, the integrated filtering and heat recovery device includes a bag filter for filtering large ice crystals in the ice slurry and a heat recovery coil arranged in the bag filter, and the heat recovery coil is used to receive water in the liquid storage evaporation tank after the ice crystals are eliminated.

[0014] Furthermore, the liquid storage evaporation tank is connected to the condenser through a first pipe. The condenser is used to receive hot fluorine in the compressor. The liquid storage evaporation tank uses the hot fluorine to heat the water again and then sends the hot fluorine to the evaporator through a second pipe for heat exchange. After heat exchange, the gaseous hot fluorine is sent back to the compressor.

[0015] Furthermore, the evaporator is a three-medium four-channel evaporator, the three media are cold water, hot fluorine and refrigerant, and the four channels are two supercooled water channels, one hot fluorine channel and one refrigerant channel.

[0016] Furthermore, the condenser is connected to the liquid storage evaporation tank through a third pipe passing through the hot fluorine channel, and the liquid storage evaporation tank is connected to the compressor through a fourth pipe. Solenoid valves are respectively provided on the first pipe, the second pipe, the third pipe and the fourth pipe.

[0017] A control method for an efficient ice slurry cold storage air conditioning system uses the above-mentioned efficient ice slurry cold storage air conditioning system, including a supercooled water preparation process and an ice melting process when ice blockage occurs.

[0018] Furthermore, the supercooled water preparation process includes the following steps:

[0019] ① Close the solenoid valves on the third and fourth pipelines, and open the solenoid valves on the first and second pipelines;

[0020] ② The integrated filter and evaporator receives the ice slurry in the ice storage tank, filters the large ice crystals in the ice slurry to obtain supercooled water, and heats the supercooled water from 0℃ to 0.5℃;

[0021] ③ The hot fluorine in the compressor is sent to the liquid storage evaporator through the first pipe on the condenser. The liquid storage evaporator uses the hot fluorine to heat the water heated to 0.5℃ to 0.8℃ again. The heated water is sent to the heat recovery coil in the integrated filtration and heat recovery device to exchange heat with the supercooled water obtained after filtration to 0.3℃. The hot fluorine after heat exchange is sent to the evaporator through the second pipe as the medium;

[0022] ④ The water after heat exchange to 0.3℃ is sent to the evaporator to cool down to t1-t2℃;

[0023] ⑤The crystal promoter promotes the phase change of the cooled water in S4 and sends it to the ice storage tank for storage.

[0024] Further, the ice melting process when ice blockage occurs includes the following steps:

[0025] S1. When it is detected that the supercooled water is ice-blocked, close the solenoid valves on the first pipeline and the second pipeline, and open the solenoid valves on the third pipeline and the fourth pipeline;

[0026] S2. The high-temperature hot fluorine at the condensate water outlet enters the evaporator through the third pipeline and exchanges heat with the supercooled water, causing the temperature of the supercooled water to rise, thereby eliminating the ice blockage;

[0027] S – 3. The hot fluorine after heat exchange returns to the liquid storage evaporator for gas-liquid separation, and the gaseous hot fluorine is sent back to the compressor through the fourth pipeline for recycling;

[0028] S4. After the ice melting process is completed, switch the opening and closing states of the valves, close the solenoid valves on the third pipeline and the fourth pipeline, and open the solenoid valves on the first pipeline and the second pipeline.

[0029] Further, the method for monitoring ice blockage of supercooled water is as follows:

[0030] S1.1. Set the temperature of the supercooled water before entering the evaporator as T1, and the temperature of the supercooled water at the outlet of the three-medium four-channel as T2;

[0031] S1.2. When T1 > t3 °C, the temperature of the water body entering the evaporator is relatively high, and it is necessary to check the pipeline insulation performance and whether the system has a fault;

[0032] S1.3. When T1 ≤ 0 °C and t4 °C ≤ T2 ≤ t5 °C, at this time, the value of the differential pressure sensor is P1, and the system is operating normally without ice blockage;

[0033] S1.4. When T2 > t5 °C, the refrigeration temperature is insufficient at this time, and it is necessary to increase the compressor frequency H and observe the temperature after increasing H. If T2 is still greater than t5 °C, then continue to increase the compressor frequency H until t4 °C ≤ T2 ≤ t5 °C;

[0034] S1.5. When T2 < t4 °C, the refrigeration temperature is too low at this time, and it is necessary to reduce the compressor frequency H until t4 °C ≤ T2 ≤ t5 °C.

[0035] Further, in step S1.5, observe the ΔP value of the differential pressure sensor during the adjustment process. ΔP is the pressure difference before and after the supercooled water enters the evaporator;

[0036] When ΔP ≤ P1, the pressure difference value is normal and the system is operating normally;

[0037] When ΔP > P1, the system has an ice blockage:

[0038] Set the critical value of the frequency of ice blockage occurrence as τ, and the actual frequency value of ice blockage occurrence during actual operation as τ1;

[0039] When τ1 ≤ τ, close the solenoid valves on the first pipeline and the second pipeline, adjust the opening degrees of the solenoid valves on the third pipeline and the fourth pipeline, and introduce low-flow hot fluorine into the hot fluorine pipeline to exchange heat with supercooled water to eliminate ice blockage until ΔP ≤ P1, and the system operates normally;

[0040] When ΔP > P1 and τ1 > τ, the frequency of ice blockage occurrence in the system is too high, and it is not sufficient to eliminate ice blockage by using low-flow hot fluorine for heat exchange. Close the solenoid valves on the third pipeline and the fourth pipeline, adjust the opening degrees of the solenoid valves on the first pipeline and the second pipeline, and introduce high-flow hot fluorine into the hot fluorine pipeline to exchange heat with supercooled water to eliminate ice blockage until ΔP ≤ P1, and the system operates normally.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. The present invention optimizes the supercooled water system, combines the filter and the regenerator into an integrated filter-cum-regenerator, and uses the water that eliminates ice crystals and heats up to exchange heat with the ice slurry. On the one hand, it realizes the preheating of the ice slurry, and secondly, it can also cool down the water that eliminates ice crystals, and reduces the occupied space of the equipment through an integrated design;

[0043] 2. The present invention sets a liquid storage evaporation tank between the evaporators. After the hot fluorine melts ice and eliminates ice blockage through the evaporator, it returns to the liquid storage evaporation tank and returns to the compressor together with the gaseous refrigerant to realize circulation. Moreover, the supercooled water after being heated up by the integrated filter-cum-regenerator also flows through the liquid storage evaporation tank for preheating. There will be a temperature rise during this process, eliminating the ice crystals in the supercooled water, greatly reducing the risk of ice blockage in the evaporator, and improving the stability of the overall refrigeration system. Description of the Drawings

[0044] The specification drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0045] Figure 1 It is the system flow chart of an embodiment of the present invention.

[0046] Figure 2 It is the top view schematic diagram of the integrated filter-cum-regenerator of an embodiment of the present invention.

[0047] Figure 3 It is the schematic diagram of the evaporator of an embodiment of the present invention.

[0048] In the figure: 1. Integrated filtration and heat regeneration device; 2. Liquid storage and evaporation tank; 3. Evaporator; 4. Crystal promoter; 41. Ice slurry temporary storage tank; 42. Anti-propagator; 5. Ice storage tank; 11. Bag filter; 12. Heat regeneration coil; 21. First pipeline; 22. Second pipeline; 6. Condenser; 7. Compressor; 61. Third pipeline; 62. Fourth pipeline; 8. Circulating cooling tower; 81. Water pump. Detailed implementation manners

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0050] Please refer to Figures 1-3 , the high-efficiency ice slurry cold storage air-conditioning system of the present invention includes:

[0051] An integrated filtration and heat regeneration device 1 for filtering large particle ice crystals in the ice slurry to obtain subcooled water and heating the obtained subcooled water;

[0052] A liquid storage and evaporation tank 2 connected to the integrated filtration and heat regeneration device 1 through a pipeline, for heating the heated water again until the ice crystals are completely eliminated, and sending the water after eliminating the ice crystals to the integrated filtration and heat regeneration device 1 for heat exchange and cooling;

[0053] An evaporator 3 connected to the integrated filtration and heat regeneration device 1 through a pipeline, for further cooling the subcooled water cooled by heat exchange of the integrated filtration and heat regeneration device 1. By setting a liquid storage and evaporation tank 2 in front of the evaporator 3, the stability of the refrigeration system is improved;

[0054] A crystal promoter 4 for promoting the phase change of the subcooled water cooled by the evaporator 3. An anti-propagator 42 is provided on the pipeline connecting the ice promoter and the evaporator 3, and the ice slurry after the phase change is sent into the ice slurry buffer tank;

[0055] An ice storage tank 5 for storing the ice slurry in the ice box buffer tank.

[0056] In one embodiment, the integrated filtration and heat recovery device 1 includes a bag filter 11 for filtering large - particle ice crystals in the ice slurry and a heat recovery coil 12 disposed in the bag filter 11. The heat recovery coil 12 is used to receive the water after ice crystals are eliminated in the liquid storage evaporation tank 2. With such a design, the bag filter 11 filters large - particle ice crystals in the ice slurry to obtain sub - cooled water. The sub - cooled water is heated up after heat exchange with the heat recovery coil 12, and the heat exchange medium in the heat recovery coil 12 is the water after being heated up again to eliminate ice crystals, which also needs to be cooled down before the ice slurry can be prepared. Through heat exchange, it is avoided that additional energy is required to heat the sub - cooled water and cool down the water after ice crystals are eliminated, effectively avoiding waste of resources.

[0057] In one embodiment, the liquid storage evaporation tank 2 is connected to the condenser 6 through a first pipeline 21. The condenser 6 is used to receive the hot fluorine in the compressor 7. The liquid storage evaporation tank 2 uses the hot fluorine to re - heat the water, and then sends the hot fluorine into the evaporator 3 for heat exchange through a second pipeline 22. After heat exchange, the gaseous hot fluorine is sent back to the compressor 7. With such a design, the hot fluorine introduced into the liquid storage evaporation tank 2 re - heats the water entering the liquid storage evaporation tank 2, eliminating the ice crystals in the water, greatly reducing the risk of ice blockage in the evaporator 3 and enhancing the stability of the refrigeration system.

[0058] In one embodiment, the evaporator 3 is a three - medium four - channel evaporator 3. The three media are cold water, hot fluorine and refrigerant respectively. The four channels are two sub - cooled water channels, one hot fluorine channel and one refrigerant channel. The refrigerant channel is located between the two sub - cooled water channels, and a hot fluorine channel is formed between the two sub - cooled water channels.

[0059] In one embodiment, the condenser 6 is connected to the liquid storage evaporation tank 2 through a third pipeline 61 passing through the hot fluorine channel. The liquid storage evaporation tank 2 is connected to the compressor 7 through a fourth pipeline 62. Solenoid valves are respectively provided on the first pipeline 21, the second pipeline 22, the third pipeline 61 and the fourth pipeline 62. With such a design, by controlling the solenoid valves, the delivery path of the hot fluorine can be adjusted as needed, so that when ice blockage occurs, the sub - cooled water can be heated up by adjusting the delivery path of the hot fluorine to eliminate the ice blockage.

[0060] Preferably, the condenser 6 is connected through a pipeline to a circulating cooling tower 8 for supplying cooling water to the condenser 6. A water pump 81 is provided between the pipeline of the circulating cooling tower 8 and the condenser 6. With such a design, the circulating cooling tower 8 supplies cooling water to the condenser 6 to ensure the normal use of the condenser 6.

[0061] A control method for an efficient ice - slurry cold storage air - conditioning system, using the above - mentioned efficient ice - slurry cold storage air - conditioning system, includes a sub - cooled water production process and an ice - melting process when ice blockage occurs.

[0062] In one embodiment, the process for producing supercooled water includes the following steps:

[0063] ① Close the solenoid valves on the third pipeline 61 and the fourth pipeline 62, and open the solenoid valves on the first pipeline 21 and the second pipeline 22;

[0064] ② The integrated filter and evaporator 3 receives the ice slurry in the ice storage tank 5, filters the large - particle ice crystals in the ice slurry to obtain supercooled water, and heats up the obtained supercooled water from 0°C to 0.5°C;

[0065] ③ The hot fluorine in the compressor 7 is sent into the liquid storage and evaporation tank 2 through the first pipeline 21 on the condenser 6. The liquid storage and evaporation tank 2 uses the hot fluorine to heat up the water heated to 0.5°C to 0.8°C again. The heated water is sent into the regenerative coil 12 in the integrated filter and regenerative device 1 to exchange heat with the supercooled water obtained after filtration to 0.3°C. The exchanged hot fluorine is sent into the evaporator 3 through the second pipeline 22 as a medium;

[0066] ④ The water after heat exchange to 0.3°C is sent into the evaporator 3 to be cooled down to t1 - t2°C, where t1 is - 1.5 and t2 is - 2.5;

[0067] ⑤ The crystal - promoting device 4 promotes the phase change of the water cooled down in S4 and sends it into the ice storage tank 5 for storage.

[0068] In one embodiment, the ice - melting process when ice blockage occurs includes the following steps:

[0069] S1. When it is monitored that ice blockage occurs in the supercooled water, close the solenoid valves on the first pipeline 21 and the second pipeline 22, and open the solenoid valves on the third pipeline 61 and the fourth pipeline 62;

[0070] S2. The high - temperature hot fluorine at the condensate outlet enters the evaporator 3 through the third pipeline 61 to exchange heat with the supercooled water, so that the temperature of the supercooled water rises, thereby eliminating the ice blockage;

[0071] S3. The exchanged hot fluorine returns to the liquid storage evaporator 3 for gas - liquid separation, and the gaseous hot fluorine is sent back to the compressor 7 through the fourth pipeline 62 for recycling;

[0072] S4. After the ice - melting process ends, switch the opening and closing states of the valves, close the solenoid valves on the third pipeline 61 and the fourth pipeline 62, and open the solenoid valves on the first pipeline 21 and the second pipeline 22.

[0073] In one embodiment, the method for monitoring ice blockage in supercooled water is as follows:

[0074] S1.1. Set the temperature of the supercooled water before entering the evaporator 3 as T1, and the temperature of the supercooled water at the outlet of the three - medium four - channel as T2;

[0075] S1.2. When T1 > t3 °C, the water temperature entering the evaporator 3 is relatively high, and it is necessary to check the pipeline insulation performance and whether the system has failed;

[0076] S1.3. When T1 ≤ 0 °C and t4 °C ≤ T2 ≤ t5 °C, the value of the differential pressure sensor at this time is P1, and the system operates normally without ice blockage;

[0077] S1.4. When T2 > t5 °C, the refrigeration temperature is insufficient at this time. It is necessary to increase the frequency H of the compressor 7 and observe the temperature after increasing H. If T2 is still greater than t5 °C, then continue to increase the frequency H of the compressor 7 until t4 °C ≤ T2 ≤ t5 °C;

[0078] S1.5. When T2 < t4 °C, the refrigeration temperature is too low at this time. It is necessary to reduce the frequency H of the compressor 7 until t4 °C ≤ T2 ≤ t5 °C;

[0079] Among them, t3 = 2, t4 = -3, t5 = 0.

[0080] In one embodiment, in the step S1.5, observe the ΔP value of the differential pressure sensor during the adjustment process. ΔP is the pressure difference before and after the subcooled water enters the evaporator 3;

[0081] When ΔP ≤ P1, the differential pressure value is normal and the system operates normally;

[0082] When ΔP > P1, the system has an ice blockage:

[0083] Set the critical value of the ice blockage frequency as τ, and the actual ice blockage frequency value during operation is τ1;

[0084] When τ1 ≤ τ, close the solenoid valves on the first pipeline 21 and the second pipeline 22, adjust the opening degrees of the solenoid valves on the third pipeline 61 and the fourth pipeline 62, and introduce low-flow hot fluorine into the hot fluorine pipeline to exchange heat with the subcooled water to eliminate the ice blockage until ΔP ≤ P1 and the system operates normally;

[0085] When ΔP > P1 and τ1 > τ, the frequency of ice blockage in the system is too high, and using low-flow hot fluorine for heat exchange is not sufficient to eliminate the ice blockage. Close the solenoid valves on the first pipeline 21 and the second pipeline 22, adjust the opening degrees of the solenoid valves on the third pipeline 61 and the fourth pipeline 62, and introduce high-flow hot fluorine into the hot fluorine pipeline to exchange heat with the subcooled water to eliminate the ice blockage until ΔP ≤ P1 and the system operates normally.

[0086] Set P2 > P1. When ΔP > P2, the differential pressure is too large and the frequency of ice blockage in the system is too high. Close the solenoid valves on the first pipeline 21 and the second pipeline 22, adjust the opening degrees of the solenoid valves on the third pipeline 61 and the fourth pipeline 62, and introduce even higher-flow hot fluorine into the hot fluorine pipeline to exchange heat with the subcooled water to eliminate the ice blockage until ΔP ≤ P1 and the system operates normally.

[0087] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

Claims

1. An efficient ice slurry thermal energy storage air conditioning system, characterized in that, Comprising: An integrated filter and heat recovery device (1) for filtering large - particle ice crystals in ice slurry to obtain sub - cooled water and heating the obtained sub - cooled water; A liquid storage evaporation tank (2) connected to the integrated filter and heat recovery device (1) through a pipeline, for reheating the heated water to completely eliminate ice crystals and sending the water after ice crystal elimination to the integrated filter and heat recovery device (1) for heat exchange and cooling; An evaporator (3) connected to the integrated filter and heat recovery device (1) through a pipeline, for further cooling the sub - cooled water cooled by heat exchange in the integrated filter and heat recovery device (1); A crystal - promoting device (4) for promoting the phase change of the sub - cooled water cooled by the evaporator (3); An ice storage tank (5) for storing the ice slurry after the phase change promoted by the crystal - promoting device (4).

2. The efficient ice slurry cold storage air conditioning system according to claim 1, wherein, The integrated filter and heat recovery device (1) includes a bag - type filter (11) for filtering large - particle ice crystals in ice slurry and a heat recovery coil (12) arranged in the bag - type filter (11), and the heat recovery coil (12) is used to receive the water after ice crystal elimination in the liquid storage evaporation tank (2).

3. The efficient ice slurry thermal storage air conditioning system according to claim 2, wherein The liquid storage evaporation tank (2) is connected to a condenser (6) through a first pipeline (21), the condenser (6) is used to receive the hot fluorine in a compressor (7), the liquid storage evaporation tank (2) reheats the water using the hot fluorine and then sends the hot fluorine into the evaporator (3) for heat exchange through a second pipeline (22), and the gaseous hot fluorine after heat exchange is sent back to the compressor (7).

4. The efficient ice slurry thermal storage air conditioning system according to claim 3, wherein The evaporator (3) is a three - medium four - channel evaporator (3), the three media are cold water, hot fluorine, and refrigerant respectively, and the four channels are two sub - cooled water channels, one hot fluorine channel, and one refrigerant channel.

5. The efficient ice slurry thermal storage air conditioning system according to claim 4, wherein, The condenser (6) is connected to the liquid storage evaporation tank (2) through a third pipeline (61) passing through the hot fluorine channel, the liquid storage evaporation tank (2) is connected to the compressor (7) through a fourth pipeline (62), and solenoid valves are respectively arranged on the first pipeline (21), the second pipeline (22), the third pipeline (61), and the fourth pipeline (62).

6. A control method for an efficient ice slurry thermal energy storage air conditioning system, characterized in that, Using the high - efficiency ice slurry cold storage air - conditioning system as described in any one of claims 1 - 5, including a sub - cooled water production process and an ice melting process when ice blockage occurs.

7. The control method of the efficient ice slurry thermal storage air conditioning system according to claim 6, characterized in that, The sub - cooled water production process includes the following steps: ① Close the solenoid valves on the third pipeline (61) and the fourth pipeline (62), and open the solenoid valves on the first pipeline (21) and the second pipeline (22); ② The integrated filter and evaporator (3) receives the ice slurry in the ice storage tank (5), filters the large - particle ice crystals in the ice slurry to obtain sub - cooled water, and heats the obtained sub - cooled water from 0°C to 0.5°C; ③ The hot fluorine in the compressor (7) is sent into the liquid storage evaporation tank (2) through the first pipeline (21) on the condenser (6), the liquid storage evaporation tank (2) reheats the water heated to 0.5°C to 0.8°C using the hot fluorine, the heated water is sent into the heat recovery coil (12) in the integrated filter and heat recovery device (1) to exchange heat with the filtered sub - cooled water to 0.3°C, and the hot fluorine after heat exchange is sent into the evaporator (3) as a medium; ④ The water after being heated to 0.3 °C is sent to the evaporator (3) to be cooled to t1 - t2 °C; ⑤ The crystal promoter (4) promotes the phase change of the cooled water in S4 and sends it to the ice storage tank (5) for storage.

8. The control method of the high-efficiency ice slurry cold storage air-conditioning system according to claim 6, characterized in that, The ice melting process when ice blockage occurs includes the following steps: S1. When it is detected that the supercooled water has an ice blockage, close the solenoid valves on the first pipeline (21) and the second pipeline (22), and open the solenoid valves on the third pipeline (61) and the fourth pipeline (62); S2. The high-temperature hot fluorine at the condensate water outlet enters the evaporator (3) through the third pipeline (61) to exchange heat with the supercooled water, causing the temperature of the supercooled water to rise, thereby eliminating the ice blockage; S3. The heat-exchanged hot fluorine returns to the liquid storage evaporator (3) for gas-liquid separation, and the gaseous hot fluorine is sent back to the compressor (7) through the fourth pipeline (62) for re-circulation; S4. After the ice melting process ends, switch the opening and closing states of the valves, close the solenoid valves on the third pipeline (61) and the fourth pipeline (62), and open the solenoid valves on the first pipeline (21) and the second pipeline (22).

9. The control method of the high-efficiency ice slurry cold storage air-conditioning system according to claim 8, characterized in that The method for monitoring ice blockage of supercooled water is as follows: S1.

1. Set the temperature of the supercooled water before entering the evaporator (3) as T1, and the temperature of the supercooled water at the outlet of the three-medium four-channel as T2; S1.

2. When T1 > t3 °C, the water temperature entering the evaporator (3) is relatively high, and it is necessary to check the pipeline heat preservation performance and whether the system has a failure; S1.

3. When T1 ≤ 0 °C and t4 °C ≤ T2 ≤ t5 °C, the value of the differential pressure sensor at this time is P1, and the system is operating normally without ice blockage; S1.

4. When T2 > t5 °C, the refrigeration temperature is insufficient at this time. It is necessary to increase the frequency H of the compressor (7) and observe the temperature after increasing H. If T2 is still greater than t5 °C, continue to increase the frequency H of the compressor (7) until t4 °C ≤ T2 ≤ t5 °C; S1.

5. When T2 < t4 °C, the refrigeration temperature is too low at this time. It is necessary to reduce the frequency H of the compressor (7) until t4 °C ≤ T2 ≤ t5 °C.

10. The control method of the efficient ice slurry energy storage air conditioning system according to claim 9, characterized in that, In step S1.5, observe the ΔP value of the differential pressure sensor during the adjustment process. ΔP is the pressure difference before and after the supercooled water enters the evaporator (3); When ΔP ≤ P1, the pressure difference value is normal and the system is operating normally; When ΔP > P1, the system has an ice blockage: Set the critical value of the ice blockage frequency as τ, and the actual ice blockage frequency value during operation as τ1; When τ1 ≤ τ, close the solenoid valves on the first pipeline (21) and the second pipeline (22), adjust the opening degrees of the solenoid valves on the third pipeline (61) and the fourth pipeline (62), and introduce low-flow hot fluorine into the hot fluorine pipeline to exchange heat with the supercooled water to eliminate the ice blockage until ΔP ≤ P1 and the system operates normally; When ΔP > P1 and τ1 > τ, the frequency of ice blockage in the system is too high, and using low-flow hot fluorine for heat exchange is not sufficient to eliminate the ice blockage. Close the solenoid valves on the third pipeline (61) and the fourth pipeline (62), adjust the opening degrees of the solenoid valves on the first pipeline (21) and the second pipeline (22), and introduce high-flow hot fluorine into the hot fluorine pipeline to exchange heat with the supercooled water to eliminate the ice blockage until ΔP ≤ P1 and the system operates normally.

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