Direct ice storage heat pump air conditioning system
Patent Information
- Application Number
- CN202522207182.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-10-20
AI Technical Summary
[0003]针对上述存在的技术问题，本实用新型提供了一种直接式冰蓄冷热泵空调系统，以解决现有冰蓄冷热泵系统存在季节性设备闲置和功能单一的问题，该直接式冰蓄冷热泵空调系统能够将保温箱由蓄冷箱转变为蓄热箱，从而在不同的季节产生不同的作用
[0009] This direct-type ice storage heat pump air conditioning system effectively overcomes the technical bottleneck of existing systems that can only achieve a single cold storage function by relying on peak and off-peak electricity through innovative design of the pipe connection structure and key valves, significantly improving the system's multifunctionality and seasonal adaptability. Specifically, the system can flexibly switch the flow path of refrigerant between various pipes and core components through the coordinated operation of a four-way reversing valve and the first and second three-way regulating valves. Combined with the one-way expansion valve on the fourth pipe (ensuring stable refrigerant throttling under cooling conditions) and the two-way expansion valve on the fifth pipe (adapting to throttling requirements under multiple operating conditions such as cooling and heating), the system has the ability to switch between multiple operating modes such as "cooling-cold storage-cold release" and "heating-heat storage-heat release". In summer cooling scenarios, the system can utilize existing peak-valley electricity shifting logic, storing cold energy in an insulated box and supplying cooling for subsequent needs. Simultaneously, the one-way expansion valve ensures efficient refrigerant throttling in the cooling cycle, improving cooling efficiency. In winter, when there is no cooling demand, the system can switch to heating mode via a four-way reversing valve. The two-way expansion valve adapts to the throttling requirements of the heating cycle, storing heat in the insulated box and preventing it from becoming idle due to lack of cold energy storage. This addresses the core pain point of existing systems being idle in winter. Furthermore, this structural design eliminates the need for numerous additional complex devices; multi-condition operation can be achieved simply by optimizing piping and valve configurations. This reduces equipment modification costs while significantly improving the system's annual resource utilization efficiency, meeting the building's comprehensive needs for "energy-saving cooling in summer and efficient energy use in winter."
Smart Images
Figure CN224757339U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of air conditioning system technology, specifically relating to a direct ice storage heat pump air conditioning system. Background Technology
[0002] In the fields of building HVAC and industrial refrigeration, ice storage heat pump systems, with their ability to utilize electricity during off-peak hours, play a crucial role in reducing operating costs and alleviating peak load pressure on the power grid, and have become one of the important technological directions for energy-saving refrigeration systems. The core working principle of this type of system is that during periods of low electricity prices (usually at night), the heat pump unit prepares low-temperature chilled water or directly generates ice, storing the cooling capacity in the form of ice in a dedicated insulated box. During periods of high electricity prices (usually during peak daytime electricity consumption), the cooling capacity is released by melting the ice, combined with auxiliary refrigeration from the heat pump unit, to meet the cooling needs of buildings or industrial equipment, thereby achieving the energy utilization goal of "peak shifting and valley filling" and reducing overall operating energy consumption and costs. However, existing ice storage heat pump systems have significant limitations in terms of functional design and year-round resource utilization efficiency, making it difficult to adapt to energy demands across multiple seasons and scenarios. Firstly, the problem of functional limitation is prominent: the core design logic of current systems revolves entirely around a single cycle of "cooling-storage-release," with the triggering conditions for cold energy storage and utilization being strongly tied to peak-valley electricity pricing periods. This means that cold energy storage and utilization can only be achieved through the difference between peak and off-peak electricity prices, and the system cannot flexibly adjust its operating mode according to changes in ambient temperature and actual user energy needs (such as winter heating and domestic hot water supply). For example, during peak summer cooling demand, the system can function normally for cold storage and peak-shaving, but when ambient temperature decreases and cooling demand weakens or disappears, the system struggles to expand into other energy utilization functions, resulting in limited overall equipment utilization. Furthermore, the problem of equipment idleness is particularly serious in winter: Due to seasonal climate influences, the demand for building air conditioning in most parts of my country is essentially zero during winter (usually from November to March of the following year). At this time, the core cooling and cold storage functions of the ice storage heat pump system completely cease. The dedicated insulated boxes used to store ice in the system, as key energy storage equipment, are typically designed with the maximum cooling load in mind, possessing excellent thermal insulation performance and structural stability. However, due to the lack of cold storage capacity in winter, these insulated boxes remain idle for extended periods. This not only wastes equipment assets but also fails to fully utilize their structural and performance advantages to meet other energy-related needs (such as small-scale winter thermal storage and material insulation). Meanwhile, as building energy systems evolve towards "multi-energy complementarity and year-round high efficiency," users are placing higher demands on the multi-functionality and seasonal adaptability of HVAC equipment. Existing ice storage heat pump systems, relying solely on peak and off-peak electricity for single-function cold storage and with the insulation tank idle in winter, can no longer meet the current comprehensive needs of buildings for "energy-saving cooling in summer and efficient equipment utilization in winter," thus hindering the further promotion and application of ice storage heat pump technology in year-round energy optimization. Therefore, overcoming the design bottleneck of the existing system's single function, solving the problem of idle insulation tanks in winter, and achieving year-round multi-functional and efficient operation of ice storage heat pump systems has become a pressing technical challenge in this field. Utility Model Content
[0003] To address the aforementioned technical problems, this utility model provides a direct ice storage heat pump air conditioning system to solve the problems of seasonal equipment idleness and limited functionality in existing ice storage heat pump systems. This direct ice storage heat pump air conditioning system can transform the insulation box from a cold storage box into a heat storage box, thereby producing different functions in different seasons.
[0004] This utility model provides a direct ice storage heat pump air conditioning system, including a compressor, a compressor inlet pipe, a compressor outlet pipe, a four-way reversing valve, a first pipe, a second pipe, a third pipe, a fourth pipe, a fifth pipe, a sixth pipe, a seventh pipe, an outdoor heat exchanger, a first three-way regulating valve, an indoor heat exchanger, an insulation box, and a second three-way regulating valve. The compressor is connected to the compressor inlet pipe and the compressor outlet pipe. One end of the compressor inlet pipe, the compressor outlet pipe, the first pipe, and the second pipe are respectively connected to the four-way reversing valve. The other end of the first pipe is connected to the outdoor heat exchanger. One end of the three pipes is connected to the outdoor heat exchanger. The other end of the third pipe, one end of the fourth pipe, and one end of the fifth pipe are connected to the first three-way regulating valve. The other end of the fourth pipe is connected to the indoor heat exchanger. The other end of the fifth pipe is connected to the insulation box. One end of the sixth pipe is connected to the indoor heat exchanger. One end of the seventh pipe is connected to the insulation box. The other ends of the sixth pipe, the other end of the seventh pipe, and the other end of the second pipe are connected to the second three-way regulating valve. A one-way expansion valve is installed on the fourth pipe, and a two-way expansion valve is installed on the fifth pipe.
[0005] Furthermore, the insulated box is equipped with a heat exchange coil, and the other end of the fifth pipe and one end of the seventh pipe are connected to the heat exchange coil. An insulation layer is provided on the outer wall of the insulated box.
[0006] Furthermore, the direct ice storage heat pump air conditioning system also includes a hot water system, which uses the insulated box as a heat source.
[0007] Furthermore, the direct ice storage heat pump air conditioning system also includes an air conditioning system, which uses the insulated box as a cold source.
[0008] Furthermore, the outdoor heat exchanger is a two-stage high-efficiency condenser.
[0009] This direct-type ice storage heat pump air conditioning system effectively overcomes the technical bottleneck of existing systems that can only achieve a single cold storage function by relying on peak and off-peak electricity through innovative design of the pipe connection structure and key valves, significantly improving the system's multifunctionality and seasonal adaptability. Specifically, the system can flexibly switch the flow path of refrigerant between various pipes and core components through the coordinated operation of a four-way reversing valve and the first and second three-way regulating valves. Combined with the one-way expansion valve on the fourth pipe (ensuring stable refrigerant throttling under cooling conditions) and the two-way expansion valve on the fifth pipe (adapting to throttling requirements under multiple operating conditions such as cooling and heating), the system has the ability to switch between multiple operating modes such as "cooling-cold storage-cold release" and "heating-heat storage-heat release". In summer cooling scenarios, the system can utilize existing peak-valley electricity shifting logic, storing cold energy in an insulated box and supplying cooling for subsequent needs. Simultaneously, the one-way expansion valve ensures efficient refrigerant throttling in the cooling cycle, improving cooling efficiency. In winter, when there is no cooling demand, the system can switch to heating mode via a four-way reversing valve. The two-way expansion valve adapts to the throttling requirements of the heating cycle, storing heat in the insulated box and preventing it from becoming idle due to lack of cold energy storage. This addresses the core pain point of existing systems being idle in winter. Furthermore, this structural design eliminates the need for numerous additional complex devices; multi-condition operation can be achieved simply by optimizing piping and valve configurations. This reduces equipment modification costs while significantly improving the system's annual resource utilization efficiency, meeting the building's comprehensive needs for "energy-saving cooling in summer and efficient energy use in winter." Attached Figure Description
[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0011] Figure 1 This is a schematic diagram of a direct ice storage heat pump air conditioning system. Detailed Implementation
[0012] This utility model discloses a direct ice storage heat pump air conditioning system, which can transform the insulation box 15 from a cold storage box to a heat storage box, thereby producing different functions in different seasons.
[0013] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0014] See Figure 1 As shown, this utility model discloses a direct-type ice storage heat pump air conditioning system, including a compressor 1, a compressor inlet pipe 2, a compressor outlet pipe 4, a four-way reversing valve 3, a first pipe 5, a second pipe 20, a third pipe 7, a fourth pipe 10, a fifth pipe 12, a sixth pipe 14, a seventh pipe 18, an outdoor heat exchanger 6, a first three-way regulating valve 8, an indoor heat exchanger 13, an insulation box 15, and a second three-way regulating valve 19. The compressor 1 is connected to the compressor inlet pipe 2 and the compressor outlet pipe 4. One end of the compressor inlet pipe 2, the compressor outlet pipe 4, one end of the first pipe 5, and one end of the second pipe 20 are respectively connected to the four-way reversing valve 3. The other end of the first pipe 5 is connected to the outdoor heat exchanger 6. The third pipe 15, the fourth pipe 20, the fifth pipe 12, the sixth pipe 14, the seventh pipe 18, the outdoor heat exchanger 6, the first three-way regulating valve 8, the indoor heat exchanger 13, the insulation box 15, and the second three-way regulating valve 19. One end of pipe 7 is connected to the outdoor heat exchanger 6. The other end of the third pipe 7, one end of the fourth pipe 10, and one end of the fifth pipe 12 are connected to the first three-way regulating valve 8. The other end of the fourth pipe 10 is connected to the indoor heat exchanger 13. The other end of the fifth pipe 12 is connected to the insulation box 15. One end of the sixth pipe 14 is connected to the indoor heat exchanger 13. One end of the seventh pipe 18 is connected to the insulation box 15. The other ends of the sixth pipe 14, the seventh pipe 18, and the second pipe 20 are connected to the second three-way regulating valve 19. A one-way expansion valve 9 is provided on the fourth pipe 10, and a two-way expansion valve 11 is provided on the fifth pipe 12.
[0015] This direct-type ice storage heat pump air conditioning system effectively overcomes the technical bottleneck of existing systems that can only rely on peak and off-peak electricity to achieve a single cold storage function through innovative design of the pipe connection structure and key valves, significantly improving the system's multifunctionality and seasonal adaptability. Specifically, the system can flexibly switch the flow path of refrigerant between various pipes and core components through the coordinated operation of the four-way reversing valve 3 and the first and second three-way regulating valves. Combined with the one-way expansion valve 9 on the fourth pipe 10 (ensuring stable refrigerant throttling under cooling conditions) and the two-way expansion valve 11 on the fifth pipe 12 (adapting to throttling requirements under multiple operating conditions such as cooling and heating), the system has the ability to switch between multiple operating modes such as "cooling-cold storage-cold release" and "heating-heat storage-heat release". In summer cooling scenarios, the system can utilize the existing peak-valley electricity shifting logic, storing cold energy in the insulation box 15 and supplying cooling for subsequent needs. Simultaneously, the one-way expansion valve 9 ensures efficient refrigerant throttling in the cooling cycle, improving cooling efficiency. In winter, when there is no cooling demand, the system can switch to heating mode via the four-way reversing valve 3. The two-way expansion valve 11 adapts to the throttling requirements of the heating cycle, storing heat in the insulation box 15, preventing it from becoming idle due to lack of cold energy storage. This solves the core pain point of existing systems being idle in winter. Furthermore, this structural design eliminates the need for numerous additional complex devices; multi-condition operation can be achieved simply by optimizing the piping and valve configuration. This reduces equipment modification costs while significantly improving the system's annual resource utilization efficiency, meeting the building's comprehensive needs for "energy-saving cooling in summer and efficient energy use in winter."
[0016] The heat exchange coil is provided in the heat-insulating box 15. The other end of the fifth pipe 12 and one end of the seventh pipe 18 are connected to the heat exchange coil. An insulation layer is provided on the outer wall of the heat-insulating box 15.
[0017] By installing heat exchange coils inside the insulated box 15 and setting an insulation layer outside the box, the energy storage efficiency and functional adaptability of the insulated box 15 are further enhanced, effectively making up for the shortcomings of the existing system where the insulated box 15 can only store ice in a rough manner and it is difficult to balance insulation performance and heat exchange efficiency.
[0018] The direct ice storage heat pump air conditioning system also includes a hot water system, which uses the insulation box 15 as a heat source.
[0019] By using the insulation box 15 as the heat source for the hot water system, the problem of the insulation box 15 being idle and having a single function in the winter of the existing system is directly addressed. This enables the cross-scenario energy utilization of the insulation box 15, which greatly improves the annual utilization rate of the equipment and the overall energy value of the system.
[0020] The direct ice storage heat pump air conditioning system also includes an air conditioning system, which uses the insulated box 15 as the cold source.
[0021] By using the insulated box 15 as the cold source for the air conditioning system, the cooling capacity utilization logic of the existing direct ice storage heat pump air conditioning system is further optimized, enhancing the system's energy efficiency and operational flexibility in cooling scenarios, while avoiding the waste of cooling resources. During peak summer cooling demand, the system can generate cooling capacity and store it in the insulated box 15 during off-peak electricity hours at night, and directly supply cooling to the air conditioning system during the day using the insulated box 15 as the cold source.
[0022] The outdoor heat exchanger 6 is a two-stage high-efficiency condenser.
[0023] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A direct ice storage heat pump air conditioning system, characterized in that, The system includes a compressor, a compressor inlet pipe, a compressor outlet pipe, a four-way reversing valve, a first pipe, a second pipe, a third pipe, a fourth pipe, a fifth pipe, a sixth pipe, a seventh pipe, an outdoor heat exchanger, a first three-way regulating valve, an indoor heat exchanger, an insulation box, and a second three-way regulating valve. The compressor is connected to the compressor inlet pipe and the compressor outlet pipe. One end of the compressor inlet pipe, the compressor outlet pipe, one end of the first pipe, and one end of the second pipe are respectively connected to the four-way reversing valve. The other end of the first pipe is connected to the outdoor heat exchanger. One end of the third pipe is connected to the outdoor heat exchanger. The other end of the third pipe, one end of the fourth pipe, and one end of the fifth pipe are connected to the first three-way regulating valve. The other end of the fourth pipe is connected to the indoor heat exchanger. The other end of the fifth pipe is connected to the insulation box. One end of the sixth pipe is connected to the indoor heat exchanger. One end of the seventh pipe is connected to the insulation box. The other ends of the sixth pipe, the seventh pipe, and the second pipe are connected to the second three-way regulating valve. A one-way expansion valve is installed on the fourth pipe, and a two-way expansion valve is installed on the fifth pipe.
2. The direct ice storage heat pump air conditioning system according to claim 1, characterized in that, The insulated box is equipped with a heat exchange coil. The other end of the fifth pipe and one end of the seventh pipe are connected to the heat exchange coil. An insulation layer is provided on the outer wall of the insulated box.
3. The direct ice storage heat pump air conditioning system according to claim 1, characterized in that, The direct ice storage heat pump air conditioning system also includes a hot water system, which uses the insulated box as a heat source.
4. A direct ice storage heat pump air conditioning system according to claim 1, characterized in that, The direct ice storage heat pump air conditioning system also includes an air conditioning system, which uses the insulated box as a cold source.
5. A direct ice storage heat pump air conditioning system according to claim 1, characterized in that, The outdoor heat exchanger is a two-stage high-efficiency condenser.