CN209893578U - Off-grid photovoltaic direct-drive ice storage air conditioner refrigerator system - Google Patents
Off-grid photovoltaic direct-drive ice storage air conditioner refrigerator system Download PDFInfo
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- CN209893578U CN209893578U CN201920302279.7U CN201920302279U CN209893578U CN 209893578 U CN209893578 U CN 209893578U CN 201920302279 U CN201920302279 U CN 201920302279U CN 209893578 U CN209893578 U CN 209893578U
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Abstract
The utility model relates to an it directly drives ice cold-storage air conditioner refrigerator system to leave net photovoltaic. The device mainly comprises a photovoltaic power generation mechanism, a refrigeration mechanism and an ice storage air conditioner refrigerator mechanism. The photovoltaic power generation mechanism comprises a solar photovoltaic panel and a compressor controller; the refrigeration mechanism comprises a direct current compressor, a condenser and an evaporation coil, wherein the direct current compressor, the condenser and the evaporation coil are sequentially connected in series to form a refrigeration loop; the ice storage air conditioner refrigerator mechanism comprises a refrigerating chamber, an ice storage chamber, a small-capacity direct-current water pump and a heat exchanger. The direct-current variable frequency compressor is adopted to realize the soft start function, and the successful start and operation under the low irradiation condition are ensured. Adopt the ice cold-storage can solve the volatility and the periodic variation of solar energy itself, simultaneously, provide cold volume night and be used for indoor cooling, the utility model discloses do not use the electric wire netting electric energy, can satisfy the storage and the storage demand of long-range tropical area with cold demand and food, medicine, have profound and remote meaning to utilizing renewable energy more effectively.
Description
Technical Field
The utility model belongs to the technical field of solar photovoltaic utilizes, relate to photovoltaic power generation, refrigeration, ice cold-storage technology and air conditioner, concretely relates to refrigerated photovoltaic ice cold-storage air conditioner/refrigerator system of dynamic ice-storage.
Background
The solar energy has the advantages of green safety, convenient taking, huge energy, no pollution, good safety and the like. Photovoltaic refrigeration is to convert solar energy into electric energy and then drive a variable-speed direct-current compressor by the electric energy. The solar energy is used for refrigeration, and the biggest advantage is that the seasonal adaptability is good, and the hotter the weather, the more refrigeration is needed, the larger the system refrigeration capacity is. The solar refrigeration is used in tropical areas, so that the refrigeration requirements of people can be greatly met, and the energy consumption is reduced. Meanwhile, solar energy has volatility and instability, and is greatly influenced by environmental factors such as weather, seasons, geographical positions and the like. And solar energy can only be used in the daytime and cannot be used at night due to its periodic limitation. In tropical regions, a large amount of food and medicines are deteriorated due to high temperature, so that the problems of food poisoning, disease death and the like are caused, and great loss is caused. These are also a significant challenge for refrigeration and cold storage.
The water/ice has the characteristics of large heat capacity and latent heat, easy acquisition, no pollution and the like, and can be used as a phase change energy storage material, namely ice cold storage. Ice storage is commonly used in large central air conditioning systems to solve the problem of unbalanced power demand. The ice cold storage technology is used in the field of solar refrigeration, the defects of solar energy can be overcome, and huge energy obtained by the solar energy is stored into ice cold, so that the problems of fluctuation and instability of the solar energy are solved, and stable utilization of the energy is realized.
In the existing research, a photovoltaic energy storage system basically comprises a photovoltaic cell assembly, a controller, a storage battery, an inverter and refrigeration equipment, and although the use of the photovoltaic energy storage system can relieve the limitation of solar irradiation on a photovoltaic refrigerator to a certain extent, the photovoltaic energy storage system has more defects and mainly has the following points: 1. the use of the storage battery can greatly increase the initial investment cost of the system, the service life of the storage battery is much shorter than that of other parts of the system, generally only two to three years exist, and the cost can also be increased by later maintenance and replacement; 2. the production, use and final recycling of the storage battery can cause serious waste pollution to the environment. Therefore, how to minimize and avoid the use of the storage battery in the photovoltaic refrigeration system is a problem to be solved.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides an ability maximize utilizes solar energy and can last to provide the cold volume from net photovoltaic directly drives ice cold-storage air conditioning refrigerator system.
The off-grid photovoltaic direct-drive ice storage air-conditioning refrigerator system comprises a photovoltaic power generation mechanism, a refrigeration mechanism and an ice storage air-conditioning refrigerator mechanism;
the photovoltaic power generation mechanism comprises a solar photovoltaic panel 1 and a compressor controller 2, and provides direct current electric energy for the off-grid photovoltaic direct-drive ice storage air-conditioning refrigerator system;
the refrigeration mechanism comprises a direct-current variable-frequency compressor 4, a condenser 5 and an evaporation coil 7, wherein the direct-current variable-frequency compressor 4, the condenser 5 and the evaporation coil 7 are sequentially connected in series to form a refrigeration loop;
the ice storage air-conditioning refrigerator mechanism comprises a refrigerating chamber 8, an ice storage chamber 9, a small-capacity direct-current water pump 13 and a heat exchanger 11; ice water is filled in the ice storage chamber 9, and the evaporation coil 7 is immersed in the ice water in the ice storage chamber 9; the refrigerating chamber 8, the ice storage chamber 9 and the evaporating coil 7 form a refrigerator mechanism; the small-capacity direct-current water pump 13 is connected with the surface heat exchanger 11 in series, the inlet of the small-capacity direct-current water pump 13 is communicated with one side of the ice storage chamber 9 through a pipeline, and the outlet of the surface heat exchanger 11 is communicated with the other side of the ice storage chamber 9 through a pipeline; a fan 10 is arranged on one side of the heat exchanger 11, and the ice storage chamber 9, the small-capacity direct-current water pump 13, the surface heat exchanger 11 and the fan 10 form an air-conditioning indoor unit;
the solar photovoltaic panel 2, the solar photovoltaic controller 3, the direct-current variable-frequency compressor 4 and the condenser 5 are located outdoors, and the refrigerator mechanism and the indoor unit of the air conditioner are located indoors;
the solar rays irradiate the solar photovoltaic panel 1 to generate direct current electric energy, the direct current compressor 4 is started at the lowest rotating speed, the refrigeration cycle is driven by the solar photovoltaic panel to generate electricity, and heat is taken away from the ice storage chamber 9 to refrigerate along with the refrigeration cycle; as the temperature decreases, ice begins to form around the expansion coil 7, forming an ice layer; at night, a direct-current water pump powered by a small-capacity storage battery drives cold water to flow, and indoor air conditioning refrigeration is carried out through a fan 10 and a surface heat exchanger 11 by utilizing cold energy released by melting ice in an ice storage chamber 9.
The technical scheme for further limiting is as follows:
the direct current variable frequency compressor 4 has a soft start function, the start rotating speed is 2500rpm, and the compressor is started at a lower rotating speed.
The thickness of the refrigerator body of the refrigerator mechanism is more than 5 cm.
The working medium in the refrigeration loop is R134 a.
The small-capacity direct-current water pump 13 is a 12V direct-current water pump or a 24V direct-current water pump, provides power for circulation of the air-conditioning water loop, is powered by a storage battery, and has power of 50-100W.
The fan 10 is a direct-current brushless fan, and is powered by a storage battery with power of 40W.
And carrying out water storage capacity of 0.3-0.4m cultivation in the ice storage chamber 9.
The beneficial technical effects of the utility model are embodied in the following aspects:
1. in the system of the utility model, compared with an AC variable frequency compressor, the DC variable frequency compressor is used, and has no energy loss caused by the inversion process, overcomes the electromagnetic noise and rotor loss of the AC variable frequency compressor, and has the advantages of higher efficiency and lower noise than the AC variable frequency compressor; the direct-current variable-frequency compressor can be started at a low rotating speed, a soft start function is realized, the requirement on starting current is reduced, the successful starting operation under the condition of low irradiation is ensured, and meanwhile, the safety of system components is also protected.
2. The photovoltaic and refrigeration module is free from a storage battery, and only a small-capacity storage battery is added in the air conditioner part, so that the cost of the system is greatly reduced, and the structural composition of the system is simplified.
3. The rotating speed of the compressor is controlled according to the voltage and current signals output by the photovoltaic system, the energy utilization efficiency of the system is higher, and the refrigeration speed is higher.
4. Solar irradiation influences photovoltaic output so as to influence the rotating speed of the compressor, and the system has the advantages that the problem that the compressor is frequently started and stopped due to unstable irradiation can be avoided in a direct-drive system, and equipment safety is protected.
5. The refrigeration module stores the refrigeration capacity generated by the photovoltaic module and the refrigeration module by adopting ice cold accumulation, so that the refrigeration capacity capable of being stored is huge, the material source is wide, the environment is protected, no pollution is caused, and the material requirement on the system structure is relatively low.
6. The ice cold accumulation is adopted, the fluctuation and periodic change of the solar energy can be solved, the utilization space of the solar energy is widened, and meanwhile, the occupied space of the solar energy is small.
7. The ice stored in the ice storage chamber can provide cold at night, solves the problem of refrigeration demand of people, and can be used for storing medicines and food in the refrigerating chamber.
8. The utility model discloses in the system, do not need external electric wire netting power supply, can use in the area of remote area and no electric wire netting UNICOM. In the using process, the purposes of saving energy, protecting environment and guaranteeing refrigeration requirements of people can be achieved only by depending on solar energy.
Description of the drawings:
fig. 1 is the overall structure diagram of the device of the present invention.
Number in fig. 1: the solar photovoltaic panel comprises a solar photovoltaic panel 1, a compressor controller 2, a direct current fuse 3, a direct current variable frequency compressor 4, a condenser 5, a throttle valve 6, an evaporation coil 7, a refrigerating chamber 8, an ice storage chamber 9, a fan 10, a surface heat exchanger 11, a small-capacity direct current pump 12, a first stop valve 13, a second stop valve 14, a third stop valve 15, a fourth stop valve 16, a fifth stop valve 17, a sixth stop valve 18 and a seventh stop valve 19.
Detailed Description
The device of the present invention will be further explained by embodiments with reference to the drawings.
As shown in fig. 1, the off-grid photovoltaic direct-drive ice storage air-conditioning refrigerator system comprises a photovoltaic power generation mechanism, a refrigeration mechanism and an ice storage air-conditioning refrigerator mechanism.
The photovoltaic power generation mechanism comprises a solar photovoltaic panel 1 and a compressor controller 2, and provides direct current electric energy for the off-grid photovoltaic direct-drive ice storage air-conditioning refrigerator system.
Sunlight irradiates the solar photovoltaic panel 1, the solar photovoltaic panel 1 converts light energy into electric energy, and the electric energy is supplied to the direct-current variable-frequency compressor 4 through the compressor controller 2 through the power transmission line. The direct current fuse 3 can prevent the compressor from generating excessive current instantaneously in the starting stage and damaging system components.
One end of the compressor controller 2 is connected with the input end of the photovoltaic panel, the other end of the compressor controller is connected with the compressor, the rotating speed of the direct-current variable-frequency compressor 4 can be controlled according to the voltage and current change input by the solar photovoltaic panel 1, and the variable-frequency operation of the direct-current variable-frequency compressor 4 is realized. When solar irradiation changes, such as in cloudy weather, the compressor controller 2 can reduce or improve the rotating speed of the compressor according to the input voltage and current, can realize the maximum utilization of energy and the improvement of refrigeration efficiency, and can also prevent the frequent start and stop of the compressor caused by the fluctuation of solar energy.
The refrigerating mechanism comprises a direct-current variable-frequency compressor 4, a condenser 5 and an evaporation coil 7, wherein the direct-current variable-frequency compressor 4, the condenser 5 and the evaporation coil 7 are sequentially connected in series to form a refrigerating circuit. The direct current variable frequency compressor 4 has a soft start function, the start rotating speed is 2500rpm, and the compressor is started at a lower rotating speed. The working fluid in the refrigeration loop is R134 a.
The ice storage air-conditioning refrigerator mechanism comprises a refrigerating chamber 8, an ice storage chamber 9, a small-capacity direct-current water pump 13 and a heat exchanger 11. The small-capacity direct-current water pump 13 is a 24V direct-current water pump and has the power of 100W. The ice storage chamber 9 is filled with ice water, and the evaporation coil 7 is immersed in the ice water in the ice storage chamber 9. The refrigerating chamber 8, the ice storage chamber 9 and the evaporating coil 7 form a refrigerator mechanism and are positioned in a box body, the volume of the box body is 0.8m by 0.8m, and the box body is provided with a heat insulation layer; and the ice storage chamber 9 is positioned at the lower part, the water storage amount in the ice storage chamber 9 is 0.3-0.4m through cultivation, and the refrigerating chamber 8 is positioned at the upper part and is placed indoors. After refrigeration in a sunny day in summer, ice can be stored in the ice storage chamber 9 at a height of 0.1-0.2m during cultivation. The refrigerating chamber 8 is used for storing certain medicines and foods, and the foods and the medicines are preserved and refrigerated by using the cold energy of the lower ice storage chamber 9. The small-capacity direct-current water pump 13 is connected with the surface heat exchanger 11 in series, the inlet of the small-capacity direct-current water pump 13 is communicated with one side of the ice storage chamber 9 through a pipeline, and the outlet of the surface heat exchanger 11 is communicated with the other side of the ice storage chamber 9 through a pipeline. A fan 10 is installed on one side of the heat exchanger 11, the fan 10 is a direct-current brushless fan, and the fan 10 is powered by a storage battery and has power of 40W. The ice storage chamber 9, the small-capacity direct-current water pump 13, the surface heat exchanger 11 and the fan 10 form an indoor unit of the air conditioner.
The solar photovoltaic panel 2, the solar photovoltaic controller 3, the direct current compressor 4 and the condenser 5 are located outdoors.
When the solar photovoltaic refrigeration cycle works, sunlight irradiates the solar photovoltaic panel 1 to generate direct current electric energy, the direct current compressor 4 is started at the lowest rotating speed, and the refrigeration cycle is driven by the solar photovoltaic panel to generate electricity. After being discharged, the refrigerant vapor in a high-temperature and high-pressure state compressed by the direct-current compressor 4 flows to a condenser through a pipeline to release heat to the environment, and the condenser 5 is arranged outside the refrigerator body of the refrigerating chamber 8 and the ice storage chamber 9; the condensed refrigerant fluid is expanded into low-temperature and low-pressure refrigerant liquid through the capillary tube in an isenthalpic manner, is evaporated through the evaporation coil 7 to absorb heat, recovers the steam state, and flows back to the direct-current compressor 4 to complete a refrigeration cycle. The evaporating coil is arranged in the ice storage chamber 9 and is immersed in water, and when the refrigeration cycle is operated, the evaporating coil 7 absorbs heat from the water to reduce the water temperature from room temperature to 0 ℃, so that an ice layer is formed around the evaporating coil.
At night, cold water in the ice storage chamber 9 cools the indoor space through the small-capacity direct-current water pump 12 and the air conditioning indoor unit consisting of the surface heat exchanger 11 and the fan 10. The power of the small-capacity direct-current water pump is 12-100W, the power of the fan 10 is 40W, and the small-capacity direct-current water pump and the fan can be powered by a storage battery with 12V and 150 AH. The storage battery is charged by the photovoltaic panel in daytime. Cold water in the ice storage chamber exchanges heat with indoor air through the surface heat exchanger 11 and then returns to the ice storage chamber to absorb cold released by ice melting, and then continues to circulate, so that the effect of refrigerating at night is achieved.
The utility model is used for summer, because solar energy and the high matching nature of refrigeration demand, can hold the ice when solar energy was sufficient daytime, utilize the ice and the cold water that hold to carry out the room air conditioner refrigeration night, can maintain the room indoor temperature of 25 ℃ night of a 20 square meter.
The above is only a specific embodiment of the present invention, and does not limit the protection scope of the present invention. In addition to the above embodiments, other embodiments of the present invention are also possible. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the scope of the present invention as claimed.
Claims (7)
1. Off-grid photovoltaic directly drives ice cold-storage air conditioner refrigerator system, its characterized in that: the device comprises a photovoltaic power generation mechanism, a refrigeration mechanism and an ice storage air conditioner refrigerator mechanism;
the photovoltaic power generation mechanism comprises a solar photovoltaic panel (1) and a compressor controller (2), and provides direct current electric energy for the off-grid photovoltaic direct-drive ice storage air-conditioning refrigerator system;
the refrigeration mechanism comprises a direct-current variable-frequency compressor (4), a condenser (5) and an evaporation coil (7), wherein the direct-current variable-frequency compressor (4), the condenser (5) and the evaporation coil (7) are sequentially connected in series to form a refrigeration loop;
the ice storage air-conditioning refrigerator mechanism comprises a refrigerating chamber (8), an ice storage chamber (9), a small-capacity direct-current water pump (13) and a heat exchanger (11); ice water is filled in the ice storage chamber (9), and the evaporation coil (7) is immersed in the ice water in the ice storage chamber (9); the refrigerating chamber (8), the ice storage chamber (9) and the evaporating coil (7) form a refrigerator mechanism; the small-capacity direct-current water pump (13) is connected with the surface heat exchanger (11) in series, the inlet of the small-capacity direct-current water pump (13) is communicated with one side of the ice storage chamber (9) through a pipeline, and the outlet of the surface heat exchanger (11) is communicated with the other side of the ice storage chamber (9) through a pipeline; a fan (10) is arranged on one side of the heat exchanger (11), and the ice storage chamber (9), the small-capacity direct-current water pump (13), the surface heat exchanger (11) and the fan (10) form an air-conditioning indoor unit;
the solar photovoltaic panel (1), the solar photovoltaic controller (3), the direct-current variable-frequency compressor (4) and the condenser (5) are located outdoors, and the refrigerator mechanism and the indoor unit of the air conditioner are located indoors;
the solar rays irradiate the solar photovoltaic panel (1) to generate direct current electric energy, the direct current variable frequency compressor (4) is started at the lowest rotating speed, the refrigeration cycle is driven by the power generation of the solar photovoltaic panel, and heat is taken away from the ice storage chamber (9) to refrigerate along with the work of the refrigeration cycle; as the temperature decreases, ice begins to form around the evaporator coil (7) forming an ice layer; at night, a direct-current water pump powered by a small-capacity storage battery drives cold water to flow, and indoor air conditioning refrigeration is performed through a fan (10) and a surface heat exchanger (11) by using cold energy released by melting ice in an ice storage chamber (9).
2. The off-grid photovoltaic direct-drive ice storage air conditioning and refrigerator system of claim 1, characterized in that: the direct-current variable-frequency compressor (4) has a soft start function, and the start rotating speed is 2500 rpm.
3. The off-grid photovoltaic direct-drive ice storage air conditioning and refrigerator system of claim 1, characterized in that: the thickness of the refrigerator body of the refrigerator mechanism is more than 5 cm.
4. The off-grid photovoltaic direct-drive ice storage air conditioning and refrigerator system of claim 1, characterized in that: the working medium in the refrigeration loop is R134 a.
5. The off-grid photovoltaic direct-drive ice storage air conditioning and refrigerator system of claim 1, characterized in that: the small-capacity direct-current water pump (13) is a 12V direct-current water pump or a 24V direct-current water pump, provides power for circulation of the air-conditioning water loop, is powered by a storage battery, and has power of 50-100W.
6. The off-grid photovoltaic direct-drive ice storage air conditioning and refrigerator system of claim 1, characterized in that: the fan (10) is a direct-current brushless fan and is powered by a storage battery.
7. The off-grid photovoltaic direct-drive ice storage air conditioning and refrigerator system of claim 1, characterized in that: and the water storage capacity in the ice storage chamber (9) is 0.3-0.4m through cultivation.
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| CN201920302279.7U CN209893578U (en) | 2019-03-11 | 2019-03-11 | Off-grid photovoltaic direct-drive ice storage air conditioner refrigerator system |
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| CN201920302279.7U CN209893578U (en) | 2019-03-11 | 2019-03-11 | Off-grid photovoltaic direct-drive ice storage air conditioner refrigerator system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882975A (en) * | 2019-03-11 | 2019-06-14 | 中国科学技术大学 | Off-network photovoltaic directly drives ice-storage air-conditioning refrigerator system |
| US11739992B2 (en) | 2021-03-03 | 2023-08-29 | Kuwait University | Air conditioning system with solar-powered subcooling system |
-
2019
- 2019-03-11 CN CN201920302279.7U patent/CN209893578U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882975A (en) * | 2019-03-11 | 2019-06-14 | 中国科学技术大学 | Off-network photovoltaic directly drives ice-storage air-conditioning refrigerator system |
| US11739992B2 (en) | 2021-03-03 | 2023-08-29 | Kuwait University | Air conditioning system with solar-powered subcooling system |
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