Ice-source heat pump system with seasonal energy storage function

Abstract

The utility model discloses a kind of ice-source heat pump systems with seasonal energy storage function, it is related to ice-source heat pump equipment field, system includes: refrigerant circulation system, ice-making circulation system, hot water heat storage system, hot water heating system, cold water cooling system and auxiliary heat dissipation system, auxiliary ice melting system;The refrigerant circulation system includes at least by compressor, condenser, throttling device and subcooler;The ice-making circulation system includes at least by subcooler, crystal promoter, ice storage device, cold water pump and filter and corresponding valve are sequentially connected by pipeline formation;Wherein, the ice storage device at least by liquid level column, ice surface height sensor and heat preservation shell are composed;The ice-source heat pump system with seasonal energy storage function of the utility model mainly realizes to combine water source heat pump and ice-making system, utilizes latent heat of water phase change to take heat, realizes efficient heating, saves water consumption of water source heat pump, simultaneously widens the application range of water source heat pump in cold region.

Description

Technical Field

[0001] This utility model relates to the field of ice source heat pump technology, specifically to a heat pump system with seasonal energy storage function that uses ice or low-temperature environment as heat source. Background Technology

[0002] Water source heat pumps, as an important clean heating method, are widely used in North China and Northeast my country. Water source heat pumps typically utilize low-temperature heat sources such as surface water, groundwater, or reclaimed water for heat extraction. They generally can only utilize water sources with a temperature above 6°C; otherwise, problems such as heat exchanger freezing and unstable operation of the heat pump system can easily occur. Furthermore, because they only utilize a portion of the sensible heat of the water, water source heat pumps require a large amount of water resources to achieve large-scale heating.

[0003] Traditional heat pump systems experience a significant drop in efficiency at extremely low temperatures, making it difficult to meet the heating needs of cold regions. Existing technologies, such as air-source heat pumps, suffer from insufficient heating capacity at low temperatures, while ground-source heat pumps are limited by geographical conditions. Therefore, there is an urgent need for a heat pump system capable of operating efficiently in low-temperature environments.

[0004] In response to the problems existing in conventional heating systems such as air source heat pumps and ground source heat pumps, the most effective measure at present is ice source heat pump technology, which uses the latent heat of phase change of water for heating, so that the heat pump system can operate efficiently and stably in low-temperature environments. Utility Model Content

[0005] The purpose of this invention is to provide an ice source heat pump system with seasonal energy storage function, which achieves heating and cooling by utilizing the latent heat of phase change of ice.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An ice-source heat pump system with seasonal energy storage function includes a refrigerant circulation system, an ice-making circulation system, a hot water storage system, an auxiliary heat dissipation system, and an auxiliary ice-melting system. The refrigerant circulation system includes a compressor, a condenser, a throttling device, and a subcooler, which are sequentially connected by pipes to form a closed refrigeration loop filled with refrigerant. The ice-making circulation system includes a subcooler, a crystallizer, and an ice storage device, which are sequentially connected by pipes. The hot water storage system includes a condenser and a heat storage device, which are connected by pipes. The auxiliary heat dissipation system includes a condenser and a first cooling tower, which are connected by pipes. The auxiliary ice-melting system includes an ice storage device and a second cooling tower, which are connected by pipes.

[0008] In one possible implementation, the ice-making circulation system further includes a cold water pump, a filter, and an ice water outlet shut-off valve. The cold water pump is connected between the ice storage device and the filter via a pipeline, and the filter is connected to the subcooler via a pipeline, so that the subcooler, crystallizer, ice storage device, cold water pump, and filter form a complete circulation through the pipeline. The ice water outlet shut-off valve is installed on the pipeline connecting the ice storage device and the cold water pump.

[0009] In one possible implementation, the hot water storage system further includes a hot water pump, a storage inlet shut-off valve, a storage outlet shut-off valve, a temperature sensor T1, and a temperature sensor T2. The hot water pump is connected to the storage device via a pipeline. The storage inlet shut-off valve is installed on the pipeline connecting the condenser and the storage device. The storage outlet shut-off valve is installed on the pipeline connecting the storage device and the hot water pump. The temperature sensor T1 is installed on the pipeline at the inlet of the storage device, and the temperature sensor T2 is installed on the pipeline at the outlet of the storage device. Both the temperature sensor T1 and the temperature sensor T2 are signal-connected to the system's control module.

[0010] In one possible implementation, a hot water heating system is also included, comprising an energy user terminal, a hot water pump, a first heating inlet shut-off valve, and a first heating outlet shut-off valve. The hot water pump is connected to a condenser via a pipeline. The first heating inlet shut-off valve is installed on the pipeline connecting the condenser and the energy user terminal, and the first heating outlet shut-off valve is installed on the pipeline connecting the energy user terminal and the hot water pump, thereby forming a circulation between the condenser, the first heating inlet shut-off valve, the energy user terminal, the first heating outlet shut-off valve, and the hot water pump through the pipeline.

[0011] In one possible implementation, a chilled water cooling system is also included, comprising a cooling water pump, a cooling inlet shut-off valve, and a cooling outlet shut-off valve. The cooling water pump is connected to an ice storage device via a pipeline. The cooling inlet shut-off valve is installed on the pipeline connecting the ice storage device and the energy-consuming terminal. The cooling outlet shut-off valve is installed on the pipeline connecting the energy-consuming terminal and the cooling water pump, thereby forming a circulation between the ice storage device, the cooling inlet shut-off valve, the energy-consuming terminal, the cooling outlet shut-off valve, and the cooling water pump through the pipeline.

[0012] In one possible implementation, the ice storage device includes a liquid level column, an ice surface height sensor, and an insulating shell. The insulating shell is wrapped around the outside of the ice storage device. The liquid level column is installed on one side of the ice storage device and communicates with the inside of the ice storage device. The ice surface height sensor is installed on the top inside the ice storage device and is signal-connected to the system's control module.

[0013] In one possible implementation, the ice-making circulation system further includes a water supply device and a water supply shut-off valve. The water supply device is connected to the piping of the ice-making circulation system via a pipe. The water supply shut-off valve is installed on the pipe connecting the water supply device and the ice-making circulation system. The auxiliary heat dissipation system further includes a first cooling tower inlet shut-off valve and a first cooling tower outlet shut-off valve. The first cooling tower inlet shut-off valve is installed on the pipe connecting the condenser and the first cooling tower. The first cooling tower outlet shut-off valve is installed on the pipe connecting the first cooling tower and the hot water pump. The auxiliary ice-melting system further includes a second cooling tower inlet shut-off valve and a second cooling tower outlet shut-off valve. The second cooling tower inlet shut-off valve is installed on the pipe connecting the ice storage device and the second cooling tower. The second cooling tower outlet shut-off valve is installed on the pipe connecting the second cooling tower and the cooling water pump.

[0014] Compared with existing technologies, the advantages of this invention are as follows: By combining a refrigerant circulation system with an ice-making circulation system, this invention utilizes the refrigerant circulating in a closed refrigeration loop. This allows the subcooler to cool the cold water in the ice-making circulation system below its freezing point, followed by crystallization to form an ice-water mixture containing ice crystals. Heat transfer and storage are achieved through the latent heat of phase change of ice. Compared to traditional water source heat pumps that only utilize the sensible heat of water, the latent heat of phase change has a higher heat density, allowing for heating or cooling needs to be met without consuming large amounts of water, significantly reducing system water consumption. Furthermore, traditional water source heat pumps are prone to heat exchanger freezing and unstable operation due to excessively low water temperatures. This system, based on the energy utilization method of latent heat of phase change, can stably obtain heat even in low-temperature environments in cold regions, effectively broadening the application range of heat pump systems.

[0015] The system's thermal storage and ice storage modes allow for the rational storage and utilization of energy based on seasonal variations and electricity price differences. During winter nights when electricity prices are low, the hot water thermal storage system stores the high-temperature hot water generated by the condenser in the storage unit, which is then supplied to energy-consuming terminals during the day via the hot water heating system. In summer nights, the ice-water mixture is stored in the ice storage unit via the ice-making circulation system, providing cooling to energy-consuming terminals during the day. This fully utilizes low-cost electricity during off-peak hours, significantly reducing users' energy costs while balancing the grid's daytime and nighttime electricity load. Furthermore, temperature sensors T1 and T2 monitor the inlet and outlet water temperatures of the thermal storage unit. When the temperature difference is less than a set value, the system automatically activates the auxiliary cooling system to dissipate excess heat from the condenser through the first cooling tower. When the ice surface height sensor detects that the ice surface is too high, the auxiliary ice-melting system automatically activates, dissipating excess cold energy through the second cooling tower. This dynamic adjustment of the system load requires no manual intervention, improving automation and reducing manual operation costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the ice source heat pump system with seasonal energy storage function in an embodiment of this utility model;

[0018] Figure 2 for Figure 1 The diagram shows the heat storage mode flow chart of an ice source heat pump system with seasonal energy storage function.

[0019] Figure 3 for Figure 1 The diagram shows the ice storage mode flow chart of an ice source heat pump system with seasonal energy storage function.

[0020] The components include: 1. Compressor; 2. Condenser; 3. Throttling device; 4. Subcooler; 5. Crystallizer; 6. Ice storage device; 7. Cold water pump; 8. Filter; 9. Water supply device; 10. Heat storage device; 11. First cooling tower; 12. Second cooling tower; 13. Hot water pump; 14. Hot water supply pump; 15. Cooling water pump; 16. Liquid level column; 17. Ice surface height sensor; 18. Ice water outlet shut-off valve; 19. Water supply shut-off valve; 20. Heat storage inlet valve. 21. Heat storage outlet stop valve; 22. First heating inlet stop valve; 23. First heating outlet stop valve; 24. Second heating inlet stop valve; 25. Second heating outlet stop valve; 26. First cooling tower inlet stop valve; 27. First cooling tower outlet stop valve; 28. Cooling inlet stop valve; 29. ​​Cooling outlet stop valve; 30. Second cooling tower inlet stop valve; 31. Second cooling tower outlet stop valve; 32. Energy consumption terminal. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] Example:

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, in the embodiments of this utility model are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0024] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] This utility model provides an ice source heat pump system with seasonal energy storage function, including a refrigerant circulation system, an ice-making circulation system, a hot water storage system, an auxiliary heat dissipation system, and an auxiliary ice-melting system. The refrigerant circulation system includes a compressor, a condenser, a throttling device, and a subcooler. The compressor, condenser, throttling device, and subcooler are connected sequentially through pipes to form a closed refrigeration loop, which is filled with refrigerant. The ice-making circulation system includes a subcooler, a crystallizer, and an ice storage device. The subcooler, crystallizer, and ice storage device are connected sequentially through pipes. The hot water storage system includes a condenser and a heat storage device. The condenser and heat storage device are connected through pipes. The auxiliary heat dissipation system includes a condenser and a first cooling tower. The condenser and the first cooling tower are connected through pipes. The auxiliary ice-melting system includes an ice storage device and a second cooling tower. The ice storage device and the second cooling tower are connected through pipes.

[0026] In some embodiments, the ice-making circulation system further includes a cold water pump, a filter, and an ice water outlet shut-off valve. The cold water pump is connected between the ice storage device and the filter via a pipeline, and the filter is connected to the subcooler via a pipeline, so that the subcooler, crystallizer, ice storage device, cold water pump, and filter form a complete circulation through the pipeline. The ice water outlet shut-off valve is installed on the pipeline connecting the ice storage device and the cold water pump.

[0027] In some embodiments, the hot water storage system further includes a hot water pump, a heat storage inlet shut-off valve, a heat storage outlet shut-off valve, a temperature sensor T1, and a temperature sensor T2. The hot water pump is connected to the heat storage device via a pipeline. The heat storage inlet shut-off valve is installed on the pipeline connecting the condenser and the heat storage device. The heat storage outlet shut-off valve is installed on the pipeline connecting the heat storage device and the hot water pump. The temperature sensor T1 is installed on the pipeline at the inlet of the heat storage device, and the temperature sensor T2 is installed on the pipeline at the outlet of the heat storage device. Both the temperature sensor T1 and the temperature sensor T2 are signal-connected to the system's control module.

[0028] In some embodiments, a hot water heating system is also included, comprising an energy-consuming terminal, a hot water pump, a first heating inlet shut-off valve, and a first heating outlet shut-off valve. The hot water pump is connected to a condenser via a pipeline. The first heating inlet shut-off valve is installed on the pipeline connecting the condenser and the energy-consuming terminal, and the first heating outlet shut-off valve is installed on the pipeline connecting the energy-consuming terminal and the hot water pump, so that the condenser, the first heating inlet shut-off valve, the energy-consuming terminal, the first heating outlet shut-off valve, and the hot water pump form a circulation through the pipeline.

[0029] In some embodiments, a cold water cooling system is also included, comprising a cooling water pump, a cooling inlet shut-off valve, and a cooling outlet shut-off valve. The cooling water pump is connected to an ice storage device via a pipeline. The cooling inlet shut-off valve is installed on the pipeline connecting the ice storage device and the energy-consuming terminal. The cooling outlet shut-off valve is installed on the pipeline connecting the energy-consuming terminal and the cooling water pump, thereby forming a circulation between the ice storage device, the cooling inlet shut-off valve, the energy-consuming terminal, the cooling outlet shut-off valve, and the cooling water pump through the pipeline.

[0030] In some embodiments, the ice storage device includes a liquid level column, an ice surface height sensor, and an insulation shell. The insulation shell is wrapped around the outside of the ice storage device. The liquid level column is installed on one side of the ice storage device and communicates with the inside of the ice storage device. The ice surface height sensor is installed on the top inside the ice storage device and is signal-connected to the control module of the system.

[0031] In some embodiments, the ice-making circulation system further includes a water supply device and a water supply shut-off valve. The water supply device is connected to the piping of the ice-making circulation system via a pipe. The water supply shut-off valve is installed on the pipe connecting the water supply device and the ice-making circulation system. The auxiliary heat dissipation system further includes a first cooling tower inlet shut-off valve and a first cooling tower outlet shut-off valve. The first cooling tower inlet shut-off valve is installed on the pipe connecting the condenser and the first cooling tower. The first cooling tower outlet shut-off valve is installed on the pipe connecting the first cooling tower and the hot water pump. The auxiliary ice-melting system further includes a second cooling tower inlet shut-off valve and a second cooling tower outlet shut-off valve. The second cooling tower inlet shut-off valve is installed on the pipe connecting the ice storage device and the second cooling tower. The second cooling tower outlet shut-off valve is installed on the pipe connecting the second cooling tower and the cooling water pump.

[0032] The working process applicable to the above-mentioned ice source heat pump system with seasonal energy storage function specifically includes:

[0033] Start the refrigerant circulation system to circulate the refrigerant within the closed refrigeration loop; start the ice-making circulation system, where chilled water enters the subcooler and is cooled by the circulating refrigerant. The cooled water is then processed by the crystallizer to form an ice-water mixture, which enters the ice storage device; start the hot water storage system, where the refrigerant in the condenser releases heat to raise the water temperature, and the heated hot water enters the storage device; monitor the relevant data of the storage device or ice storage device, and start the auxiliary heat dissipation system or auxiliary ice melting system based on the monitored data.

[0034] In some embodiments, the steps of starting the hot water storage system and monitoring data to start the auxiliary heat dissipation system include: opening the chilled water outlet shut-off valve, the heat storage inlet shut-off valve, and the heat storage outlet shut-off valve, and closing other shut-off valves; starting the cold water pump and the hot water pump, and then starting the compressor; monitoring the temperatures of temperature sensor T1 and temperature sensor T2, and calculating the temperature difference between them; when the temperature difference is less than a set value, opening the first cooling tower inlet shut-off valve and the first cooling tower outlet shut-off valve, closing the heat storage inlet shut-off valve and the heat storage outlet shut-off valve, starting the first cooling tower, and starting the auxiliary heat dissipation system; when the temperature difference is greater than or equal to the set value, maintaining the current system operation state; after the auxiliary heat dissipation system has been running for a set time, stopping the heat storage mode; when the water volume in the ice-making circulation system is insufficient, opening the water replenishment device and the water replenishment shut-off valve to replenish cold water to the ice-making circulation system, and closing the water replenishment device and the water replenishment shut-off valve after replenishment is completed.

[0035] In some embodiments, the steps of starting the ice-making circulation system and monitoring data to start the auxiliary ice-melting system include: opening the ice water outlet shut-off valve, the first cooling tower inlet shut-off valve, and the first cooling tower outlet shut-off valve, and closing other shut-off valves; starting the cold water pump and hot water pump, and then starting the compressor; monitoring the ice surface height sensor and the liquid level column to obtain the distance between the top of the ice surface and the signal receiving end of the ice surface height sensor; when the distance is less than a set value, opening the second cooling tower inlet shut-off valve and the second cooling tower outlet shut-off valve, starting the cooling water pump, starting the second cooling tower, and starting the auxiliary ice-melting system; monitoring the distance again, and when the distance is greater than the set value, shutting down the auxiliary ice-melting system, otherwise maintaining the current system operation status; after the auxiliary ice-melting system has run for a set time, stopping the ice storage mode; when cooling is needed, starting the cold water cooling system, and the cooling water pump drives the ice-water mixture in the ice storage device to be transported to the energy-consuming terminal through the corresponding valves; when heating is needed, starting the hot water heating system, and the hot water pump or hot water supply pump drives the hot water in the heat storage device or condenser to be transported to the energy-consuming terminal through the corresponding valves.

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0037] Figure 1 This is a schematic diagram of the ice source heat pump system with seasonal energy storage function in an embodiment of this utility model. See also: Figure 1 This utility model provides an ice source heat pump system with seasonal energy storage function. It achieves the organic combination of different electricity prices in summer and winter and morning and evening by setting up a refrigerant circulation system, an ice-making circulation system, a hot water heat storage system, a hot water heating system, a cold water cooling system, an auxiliary heat dissipation system, and an auxiliary ice melting system, thus expanding the application scope of the water source heat pump system to extremely cold regions.

[0038] The main function of the refrigerant circulation system is to use the refrigerant to absorb the sensible and latent heat of water and then supply the heat to the energy-consuming terminal or store it. It may include: at least a compressor 1, a condenser 2, a throttling device 3 and a subcooler 4 connected in sequence by pipes to form a closed refrigeration circuit, and the closed refrigeration circuit is filled with refrigerant.

[0039] In addition, the ice-making cycle system includes at least a subcooler 4, a crystallizer 5, an ice storage device 6, a cold water pump 7, and a filter 8, as well as corresponding valves connected sequentially by pipes. In the subcooler 4, the cold water is cooled to below the freezing point. At this time, the subcooled water is in an unstable equilibrium state. Through the action of the crystallizer 5, the subcooled water is forced to release the subcooled state and generate ice crystals, forming an ice-water mixture, which is stored in the ice storage device 6. The liquid water that has not frozen is connected to the inlet of the cold water pump 7 through the ice water outlet shut-off valve 18. The liquid water is pumped into the filter 8 to separate any possible small amount of ice crystals, and then returns to the subcooler 4 to be cooled to the subcooled state again, completing one ice-making cycle.

[0040] The ice storage device 6 is equipped with an ice surface height sensor 17, which can determine the ice surface height inside the insulation shell of the ice storage device 6 through ultrasonic or microwave positioning function, thereby calculating the ice content. In addition, the operator can also observe from the outside through the liquid level column 16 to determine the height of the remaining liquid water inside the insulation shell of the ice storage device 6, thereby facilitating the operator to determine the stage of the ice-making cycle system.

[0041] Depending on the season and time of day, the ice source heat pump system of this invention can operate in different modes to achieve different functions:

[0042] (1) Summer cooling mode

[0043] During hot summer weather, the energy terminal 32 mainly uses cooling load, and the refrigerant circulation system and ice-making circulation system are started at the same time. In addition, the auxiliary heat dissipation system is also turned on at the same time. Water enters the condenser 2 through the hot water pump 13 to absorb heat and rise in temperature. Then, it enters the first cooling tower 11 through the first cooling tower inlet shut-off valve 26 to transfer the absorbed heat to the ambient atmosphere. The cooled water returns to the hot water pump 13 suction port through the first cooling tower outlet shut-off valve 27, completing one auxiliary heat dissipation cycle.

[0044] The ice-water mixture prepared by the ice-making circulation system is stored in the ice storage device 6. Driven by the cooling water pump 15, it enters the energy terminal 32 through the cooling inlet shut-off valve 28 to provide cooling to the user. The liquid water that has absorbed heat returns to the ice storage device 6 through the cooling outlet shut-off valve 29, completing one cold water cooling cycle.

[0045] (2) Winter heating mode

[0046] In cold winter weather, the energy-consuming terminal 32 is mainly used for heat load. The refrigerant circulation system and the ice-making circulation system are started simultaneously. In addition, the auxiliary ice-melting system is also started at the same time. The cold water prepared in the ice storage device 6 is driven by the cooling water pump 15, passes through the second cooling tower inlet shut-off valve 30, and enters the second cooling tower 12 to transfer the cold energy to the ambient atmosphere. The heated water returns to the ice storage device 6 through the second cooling tower outlet shut-off valve 31. In the hot water heating system, the circulating water driven by the hot water pump 13 enters the condenser 2 to absorb heat and increase its temperature. Then, it enters the energy-consuming terminal 32 through the first heating inlet shut-off valve 22 to provide heat to users. The circulating water that has cooled down after dissipation passes through the first heating outlet shut-off valve 23 and re-enters the water inlet of the hot water pump 13 to complete one hot water heating cycle.

[0047] (3) Nighttime energy storage mode

[0048] Because electricity demand differs between day and night, and nighttime electricity prices are generally low, the operating cost of heat pump units is relatively low. In cold winter weather, the prepared high-temperature hot water is stored in the heat storage device 10 via the hot water storage system for daytime heating, while the auxiliary ice-melting system is activated to dissipate the cold water's heat into the ambient atmosphere. In hot summer weather, all ice is stored in the ice storage device 6 via the ice-making circulation system for daytime cooling, while the auxiliary heat dissipation system is activated to dissipate the hot water's heat into the ambient atmosphere.

[0049] This utility model's ice-source heat pump system combines a water-source heat pump and an ice-making system, utilizing the latent heat of water's phase change for heat extraction to achieve efficient heating, saving water consumption of the water-source heat pump, and expanding the application range of water-source heat pumps in cold regions. In addition, the system includes a heat storage mode and an ice storage mode to meet different needs for heating in winter and cooling in summer, and can utilize off-peak electricity prices at night to achieve low-cost energy storage for heating or cooling during the day, greatly reducing users' energy costs.

[0050] Figure 2 for Figure 1 The flow chart of the thermal storage mode of the ice source heat pump system with seasonal energy storage function is shown below. Figure 2 To meet the heat storage needs at night in winter, the heat storage mode proposed in this utility model includes the following steps:

[0051] Open the chilled water outlet shut-off valve 18, the heat storage inlet shut-off valve 20, and the heat storage outlet shut-off valve 21, while keeping all other shut-off valves closed; start the chilled water pump 7 and the hot water pump 13, and finally start the compressor 1 to activate the refrigerant circulation system and the ice-making circulation system.

[0052] Temperature sensors T1 on the inlet pipe and T2 on the outlet pipe of the heat storage device 10 are monitored. When the temperature difference between temperature sensors T1 and T2 is less than 3℃, the inlet shut-off valve 26 and the outlet shut-off valve 27 of the first cooling tower are opened, and the heat storage inlet shut-off valve 20 and the heat storage outlet shut-off valve 21 are closed. The first cooling tower 11 is started, and the auxiliary heat dissipation system is activated. At this point, the heat storage mode is complete, and excess heat is transferred to the ambient atmosphere through the auxiliary heat dissipation system. When the temperature difference between temperature sensors T1 and T2 is greater than or equal to 3℃, the system operation remains unchanged until the temperature difference is again detected to be less than 3℃. After the auxiliary heat dissipation system has been running for the set time, the heat storage mode stops.

[0053] Figure 3 for Figure 1 The flowchart of the ice storage mode of the ice source heat pump system with seasonal energy storage function is shown below. Figure 3 To meet the cooling needs on summer nights, the ice storage mode proposed in this utility model includes the following steps:

[0054] Open the chilled water outlet shut-off valve 18, the first cooling tower inlet shut-off valve 26, and the first cooling tower outlet shut-off valve 27, while keeping all other shut-off valves closed; start the chilled water pump 7 and the hot water pump 13, and finally start the compressor 1 to activate the refrigerant circulation system and the ice-making circulation system.

[0055] The ice storage device 6 is monitored by a liquid level column 16 and an ice surface height sensor 17. When the ice surface height sensor 17 detects that the distance between the top of the ice surface and the sensor signal receiver is less than 30cm, it can be determined that the ice storage device 6 has stored enough ice. The second cooling tower inlet shut-off valve 30 and the second cooling tower outlet shut-off valve 31 are then opened, the cooling water pump 15 is started, the second cooling tower 12 is started, and the auxiliary ice melting system is activated. At this point, the ice storage mode is complete, and excess cooling energy is transferred to the ambient atmosphere through the auxiliary ice melting system. The distance between the top of the ice surface and the sensor signal receiver is monitored again. When the distance is greater than 30cm, the auxiliary ice melting system is shut down; otherwise, the system operation remains unchanged. After the set time for the auxiliary ice melting system to run, the ice storage mode stops.

[0056] The above process is only to introduce the working principle of the ice source heat pump system with seasonal energy storage function of this utility model.

[0057] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0058] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] The above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made based on the substance of the content of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An ice source heat pump system with seasonal energy storage function, characterized in that, The system includes a refrigerant circulation system, an ice-making circulation system, a hot water storage system, an auxiliary heat dissipation system, and an auxiliary ice-melting system. The refrigerant circulation system comprises a compressor, a condenser, a throttling device, and a subcooler, which are sequentially connected via pipes to form a closed refrigeration loop filled with refrigerant. The ice-making circulation system includes a subcooler, a crystallizer, and an ice storage device, which are sequentially connected via pipes. The hot water storage system includes a condenser and a heat storage device, which are connected via pipes. The auxiliary heat dissipation system includes a condenser and a first cooling tower, which are connected via pipes. The auxiliary ice-melting system includes an ice storage device and a second cooling tower, which are connected via pipes.

2. The ice source heat pump system with seasonal energy storage function according to claim 1, characterized in that, The ice-making circulation system also includes a cold water pump, a filter, and an ice water outlet shut-off valve. The cold water pump is connected between the ice storage device and the filter through a pipeline. The filter is connected to the subcooler through a pipeline, so that the subcooler, crystallizer, ice storage device, cold water pump, and filter form a complete circulation through the pipeline. The ice water outlet shut-off valve is installed on the pipeline connecting the ice storage device and the cold water pump.

3. The ice source heat pump system with seasonal energy storage function according to claim 1, characterized in that, The hot water storage system also includes a hot water pump, a heat storage inlet shut-off valve, a heat storage outlet shut-off valve, a temperature sensor T1, and a temperature sensor T2. The hot water pump is connected to the heat storage device via a pipeline. The heat storage inlet shut-off valve is installed on the pipeline connecting the condenser and the heat storage device. The heat storage outlet shut-off valve is installed on the pipeline connecting the heat storage device and the hot water pump. The temperature sensor T1 is installed on the pipeline at the inlet of the heat storage device, and the temperature sensor T2 is installed on the pipeline at the outlet of the heat storage device. Both the temperature sensor T1 and the temperature sensor T2 are connected to the system's control module.

4. The ice source heat pump system with seasonal energy storage function according to claim 1, characterized in that, It also includes a hot water heating system, which includes an energy user terminal, a hot water pump, a first heating inlet shut-off valve, and a first heating outlet shut-off valve. The hot water pump is connected to a condenser through a pipeline. The first heating inlet shut-off valve is installed on the pipeline connecting the condenser and the energy user terminal, and the first heating outlet shut-off valve is installed on the pipeline connecting the energy user terminal and the hot water pump, so that the condenser, the first heating inlet shut-off valve, the energy user terminal, the first heating outlet shut-off valve, and the hot water pump form a circulation through the pipeline.

5. The ice source heat pump system with seasonal energy storage function according to claim 1, characterized in that, It also includes a cold water cooling system, which includes a cooling water pump, a cooling inlet shut-off valve, and a cooling outlet shut-off valve. The cooling water pump is connected to an ice storage device through a pipeline. The cooling inlet shut-off valve is installed on the pipeline connecting the ice storage device and the energy-consuming terminal. The cooling outlet shut-off valve is installed on the pipeline connecting the energy-consuming terminal and the cooling water pump, so that the ice storage device, the cooling inlet shut-off valve, the energy-consuming terminal, the cooling outlet shut-off valve, and the cooling water pump form a circulation through the pipeline.

6. The ice source heat pump system with seasonal energy storage function according to claim 1, characterized in that, The ice storage device includes a liquid level column, an ice surface height sensor, and an insulation shell. The insulation shell is wrapped around the outside of the ice storage device. The liquid level column is installed on one side of the ice storage device and communicates with the inside of the ice storage device. The ice surface height sensor is installed on the top inside the ice storage device and is signal-connected to the system's control module.

7. The ice source heat pump system with seasonal energy storage function according to claim 2, characterized in that, The ice-making circulation system also includes a water supply device and a water supply shut-off valve. The water supply device is connected to the ice-making circulation system via a pipe, and the water supply shut-off valve is installed on the pipe connecting the water supply device and the ice-making circulation system. The auxiliary heat dissipation system also includes a first cooling tower inlet shut-off valve and a first cooling tower outlet shut-off valve. The first cooling tower inlet shut-off valve is installed on the pipe connecting the condenser and the first cooling tower, and the first cooling tower outlet shut-off valve is installed on the pipe connecting the first cooling tower and the hot water pump. The auxiliary ice-melting system also includes a second cooling tower inlet shut-off valve and a second cooling tower outlet shut-off valve. The second cooling tower inlet shut-off valve is installed on the pipe connecting the ice storage device and the second cooling tower, and the second cooling tower outlet shut-off valve is installed on the pipe connecting the second cooling tower and the cooling water pump.

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