阅读说明：本技术 一种市电与分布式光伏独立能源结合驱动的冰蓄冷冷库系统 (Commercial power and independent energy of distributing type photovoltaic combine driven ice cold-storage freezer system ) 是由 李明 胡承志 韩友华 杜文平 周晓燕 赵乐 马明瑞 王良 尹卓 于 2019-01-15 设计创作，主要内容包括：本发明公开了一种市电与分布式光伏独立能源结合驱动的冰蓄冷冷库系统,采用市电与分布式光伏独立能源驱动,白天太阳辐照度足够时利用分布式光伏驱动压缩机组工作,同时蓄冰槽蒸发器蓄冰；白天太阳辐照度不够时利用市电驱动压缩机组工作,同时蓄冰槽蓄冰,晚上利用风机盘管融冰释冷将蓄冰槽储存的冷量释放出来给冷库供冷。整个系统中太阳能的利用节约能源,有效缓解能源压力。该系统能保证冷库正常运行,蓄冰槽内的蒸发器结构为三个蒸发器串并联结合均匀分布,有效缓解过冷冰的问题,同时能保证三个蒸发器能制备足够的冰储存起来,保证足够的蓄冰量供冷库晚上使用,维持冷库在设定温度。实现资源合理化运用和综合化利用,提升能源综合利用效率。(The invention discloses an ice storage cold storage system driven by combination of commercial power and distributed photovoltaic independent energy, which is driven by commercial power and distributed photovoltaic independent energy, wherein a compressor set is driven to work by using distributed photovoltaic when solar irradiance is enough in the daytime, and an ice storage tank evaporator stores ice; when solar irradiance is insufficient in the daytime, the compressor unit is driven by commercial power to work, the ice storage tank stores ice, and the fan coil pipe is used for melting ice and releasing cold to release cold energy stored in the ice storage tank to supply cold to the refrigeration house. The utilization of solar energy in the whole system saves energy and effectively relieves energy pressure. The system can ensure the normal operation of the refrigeration house, the evaporator structure in the ice storage tank is formed by combining three evaporators in series and parallel connection to be uniformly distributed, the problem of over-cooled ice is effectively relieved, meanwhile, the three evaporators can be ensured to prepare enough ice for storage, the enough ice storage amount is ensured to be used by the refrigeration house at night, and the refrigeration house is maintained at a set temperature. Reasonable application and comprehensive utilization of resources are realized, and comprehensive utilization efficiency of energy is improved.)

1. The utility model provides a commercial power and distributing type photovoltaic independent energy driven ice cold-storage freezer system, its characterized in that freezer system adopts commercial power and distributing type photovoltaic solar energy to combine system independent drive, effectively alleviate the power consumption pressure, improve freezer practicality and economic nature, utilize commercial power and distributing type photovoltaic solar energy to combine the drive compressor operation work, increase the ice-storage system in the system simultaneously, increase the ice-storage groove, for solving the problem of ice-storage supercooling ice of ice-storage inslot, reform transform the optimization to the evaporimeter in the ice-storage groove, utilize three little evaporimeter series-parallel connection to combine, add solenoid valve water conservancy diversion switching-over, realize different periods respectively with three evaporimeter ice making and ice-storage energy storage, solve the supercooling ice-storage problem, improve ice-making and ice-storage efficiency.

2. The utility model discloses a city power and distributed independent energy system according to claim 1, characterized in that the energy system is composed of a city power and a solar photovoltaic power generation system, on one hand, the city power is connected, on the other hand, the solar photovoltaic power generation is used, on the condition that solar energy is sufficient and irradiance is sufficient, the solar photovoltaic power generation is used for driving a compressor refrigerator to refrigerate, and driving an air cooler to refrigerate, and simultaneously, ice is stored in an ice storage tank; in the daytime, solar energy is sufficiently charged, and under the condition of sufficient irradiance, the compressor is driven by mains supply to refrigerate, so as to drive the air cooler to work, and meanwhile, ice is stored, so that 24-hour uninterrupted power supply can be realized; the dynamic tracking control technology of the maximum power point is adopted to ensure that the running power of the compressor can be positioned on the maximum power point output by the photovoltaic array at any moment under the conditions of irradiance and load.

3. The ice storage function of the ice storage tank as claimed in claim 1, wherein the three evaporators in the ice storage tank are combined in series and parallel, the three evaporators are respectively connected to the main copper pipe in parallel, the refrigerant flow direction in the evaporators is controlled and reversed by using the electromagnetic valve, time-sharing ice storage of the three small evaporators is realized, the problem of super-cooled ice is solved, and the ice making and storing efficiency is improved.

4. The time-sharing ice storage device for the three evaporators in the ice storage tank as claimed in claim 1, wherein the three electromagnetic valves are respectively arranged on pipelines of the main evaporation copper pipe connected with the three evaporators, when the unit operates and works, the first electromagnetic valve is opened first, the working medium makes and stores ice through the first evaporator, then returns to the main copper pipe main pipe of the loop and returns to the air suction port of the compressor through the gas-liquid separator to enter the compressor to form a circulation loop, when the ice storage of the first evaporator is nearly saturated, the second electromagnetic valve is opened, the working medium makes and stores ice through the second evaporator, then returns to the main copper pipe main pipe of the loop and returns to the air suction port of the compressor through the gas-liquid separator to enter the compressor to form a circulation loop; similarly, when the ice storage of the second evaporator is close to saturation, the third electromagnetic valve is opened, the working medium makes and stores ice through the third evaporator, and then returns to the main copper pipe main pipe of the loop, returns to the air suction port of the compressor through the gas-liquid separator and enters the compressor to form a circulation loop.

Technical Field

The invention relates to an ice cold storage refrigeration house system driven by combination of commercial power and distributed photovoltaic independent energy, belongs to an energy storage type refrigeration house system, and particularly relates to the field of design and manufacture of driving energy storage type refrigeration house refrigeration and solar refrigeration utilization by combination of commercial power and distributed photovoltaic independent energy.

Background

With the progress of society and the development of economy, the cold storage is mainly used as constant-temperature storage and air-conditioning equipment for food, dairy products, meat, aquatic products, chemical industry, medicines, seedling culture and the like, and the cold storage plays an increasingly important role in the fields of industry, agriculture, biological pharmacy and the like. Especially in hot summer, the cold storage and fresh keeping of agricultural products such as fruits and vegetables are particularly important. With the common use of the refrigeration houses in the fields of industry, agriculture and the like, the power consumption is very large when the refrigeration houses are used as large-scale electric equipment. The national grid pressure increases year by year, and the daytime in summer and the night in winter become the peak period of electricity utilization. In order to relieve peak pressure of electricity consumption, the national power department sets up valley price and step price, but the efficiency is very little, the peak power consumption is frequently recorded, and the situation of shortage of power supply is more and more severe.

The ice storage refrigeration house system technology driven by combination of the commercial power and the distributed photovoltaic independent energy utilizes the combination of the commercial power and the solar distributed photovoltaic independent energy to drive the compressor to operate, refrigerate and store ice, and particularly has more remarkable energy-saving effect in regions with sufficient solar illumination, so that not only is the electric power resource reasonably utilized, but also the use cost of a cooling system is reduced. The system utilizes the combination of commercial power and solar energy, reasonably utilizes solar energy resources and provides a research direction for future solar refrigeration.

The utilization of solar energy in the ice cold-storage energy-storage type refrigeration house system combining the commercial power and the distributed photovoltaic independent energy makes up the condition that other preservation methods are insufficient in the aspect of energy supply, can effectively alleviate the problem of high power consumption of the traditional refrigeration house, reasonably utilizes the solar energy, and is combined with the commercial power to avoid the condition that the requirement on the cold quantity of the refrigeration house is insufficient when the solar photovoltaic power generation is insufficient. As a large energy consumption country, China is very important in developing and utilizing new energy, the reasonable utilization of solar energy in the system has very positive significance, and a very useful application is provided for the utilization of the solar energy.

Disclosure of Invention

In order to reduce the energy consumption of the existing refrigeration house, the invention provides an ice cold storage refrigeration house system driven by combination of commercial power and distributed photovoltaic independent energy, as shown in figure 1. The energy supply of the photovoltaic independent energy driving system is realized by using the commercial power and the solar distributed photovoltaic, the universality of the system is improved, and the energy is effectively saved.

In order to improve the efficiency of the ice cold storage refrigerator, reduce the investment and maintenance cost and increase the operation stability of the ice cold storage refrigerator, the technical scheme of the invention is as follows: the ice storage system is added by utilizing the connection and combination driving of commercial power and solar distributed photovoltaic independent energy. The evaporator in the ice storage tank in the ice storage system is changed into a series-parallel connection combination of three evaporators, the connection mode of the three evaporators in the ice storage tank is shown in figure 3, a refrigerant enters a main pipe of the evaporator and is guided and reversed through three electromagnetic valves, the evaporator 20, the evaporator 21 and the evaporator 22 are connected in parallel, each evaporator branch pipe is provided with an electromagnetic valve, and the electromagnetic valves corresponding to the evaporator 20, the evaporator 21 and the evaporator 22 are respectively an electromagnetic valve 15, an electromagnetic valve 16 and an electromagnetic valve 17; similarly, a heat exchange working medium is guided and reversed through a main pipe of the evaporator through three electromagnetic valves, the evaporator 25, the evaporator 24 and the evaporator 23 are connected in parallel, each evaporator branch pipe is provided with an electromagnetic valve, the electromagnetic valves corresponding to the evaporator 25, the evaporator 24 and the evaporator 23 are an electromagnetic valve 29, an electromagnetic valve 28 and an electromagnetic valve 27, the evaporator 20 and the evaporator 23 are crossed and compact, the evaporator 21 and the evaporator 24 are crossed and compact, the evaporator 22 and the evaporator 25 are crossed and compact as shown in fig. 3, the flow direction of a refrigerant in the evaporator 20, the evaporator 21 and the evaporator 22 is opposite to the flow direction of the heat exchange working medium in the evaporator 25, the evaporator 24 and the evaporator 23, the counter-flow design is adopted, heat exchange can be achieved with the maximum effect, and the best effect is achieved. The evaporator is designed in such a way, and the diversion and reversing of the electromagnetic valve are simultaneously utilized, so that the problem of supercooled ice can be solved, and the ice storage efficiency can be improved.

The invention provides an ice storage cold storage system driven by combination of commercial power and distributed photovoltaic independent energy, which mainly comprises a distributed photovoltaic energy and commercial power system, a cold supply and ice making system and a cold supply and ice storage system, wherein the system comprises a refrigerating unit cycle and a fan coil pipe ice melting and cold releasing cycle. The refrigerating unit cycle comprises a compressor 6, an oil separator 7, a condenser 8, a liquid storage device 9, a filtering dryer 10, a proportion regulating valve 30, a throttle expansion valve 11, an air cooler 12, an ice storage tank 13, an electromagnetic valve 15, an electromagnetic valve 16, an electromagnetic valve 17, an evaporator 20, an evaporator 21, an evaporator 22 and a gas-liquid separator 19, and the fan coil ice-melting and cold-releasing cycle comprises an evaporator 23, an evaporator 24, an evaporator 25, an electromagnetic valve 26, an electromagnetic valve 27, an electromagnetic valve 28, an electromagnetic valve 29, a working medium pump 18 and a fan coil 14. The evaporator 20, the evaporator 21 and the evaporator 22 of the cold air unit cycle are immersed in the ice storage tank 13 to make and store ice. The amount of ice stored at night is released to the cold storage for use by the ice melting and cold releasing circulation of the fan coil.

The invention has the beneficial effects that the ice cold storage system is different from the traditional cold storage system, utilizes ice for cold storage, and utilizes the combination of commercial power and distributed photovoltaic independent energy for driving. The evaporator in the ice storage tank 13 is divided into three small evaporators which are guided and reversed by the electromagnetic valves, so that the problem of supercooled ice is solved, and the ice making and storing efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of an ice cold storage refrigeration house system driven by combination of commercial power and distributed photovoltaic independent energy provided by the invention.

Fig. 2 is a structure and an operation diagram of an ice cold storage refrigeration house system driven by combination of commercial power and distributed photovoltaic independent energy provided by the invention.

FIG. 3 is a schematic view of the evaporator inside the ice storage tank according to the present invention.

FIG. 4 is a schematic view of the ice storage evaporator structure and the refrigerant working medium flow direction inside the ice storage tank according to the present invention.

FIG. 5 is a schematic view of the structure of the heat-releasing evaporator and the flow direction of the heat exchange medium in the ice storage tank according to the present invention.

Detailed Description

As shown in attached figure 1, the ice cold storage refrigeration house system driven by combination of commercial power and distributed photovoltaic independent energy is characterized by comprising a distributed photovoltaic energy and commercial power system, a cold supply and ice making system and a cold supply and ice storage system, wherein the system comprises a refrigeration unit cycle and a fan coil pipe ice melting and cold releasing cycle.

Working mode 1: solar energy is sufficient in daytime, when irradiation intensity is sufficient, the compressor 6 is driven to work by using the distributed photovoltaic independent energy, when the compressor 6 of the refrigerating unit of the system works, the cold energy released by the working of the air cooler 12 is cooled for the refrigeration house, and meanwhile, the three evaporators in the ice storage tank 13 control the flow direction of a refrigerant working medium through the electromagnetic valves, so that the three evaporators make and store ice in time-sharing mode. The air cooler 12 is turned on during the day while storing ice, storing enough ice for use at night. When the temperature of the cold storage reaches the set temperature, the air cooler 12 is firstly closed, and meanwhile, the three evaporators in the ice storage tank 13 continue to store ice. When the environmental temperature gradually rises and deviates from the set temperature, the air cooler 12 starts to release cold energy and simultaneously stores ice, and the operation is circulated. Sufficient solar energy can be stored in daytime, enough ice can be stored in enough time of irradiation intensity, and the cold energy stored in the ice storage tank 13 can ensure that the cold energy supplied to the fan coil 14 for melting ice and releasing cold can meet the requirement of a refrigerator at night to maintain the set temperature. And at night, starting the ice melting and cold releasing circulation of the fan coil, starting the fan coil 14, releasing the cold energy of the ice in the ice storage tank 13, and maintaining the temperature of the refrigeration house within a set range. The operation is carried out in such a way, so that the cold storage can be sufficiently supplied all the day, the temperature of the cold storage is maintained within the set temperature range all the time, and the cold storage and the fresh keeping are realized.

The working mode 2 is as follows: in cloudy weather, solar energy is not sufficient enough daytime, under the not enough condition of irradiance, according to the solar irradiance intensity condition, when the irradiation is good, earlier with the work of distributed photovoltaic independent energy drive compressor 6, when the compressor 6 during operation of system's refrigerating unit, cold volume is given the freezer cooling in the work release of air-cooler 12, and three evaporimeters pass through the solenoid valve control refrigerant working medium flow direction in the ice-storage tank 13 simultaneously to make three evaporimeters timesharing ice making and ice storage. Because solar energy is insufficient in daytime and solar irradiance is not strong, cold quantity in the refrigeration house is possibly insufficient and cannot reach a set temperature range, and three evaporators in the ice storage tank 13 cannot store enough ice quantity. At the moment, the compressor 6 is driven by the commercial power, so that the refrigerating unit works, the cold energy released by the cold air blower 12 works to cool the refrigeration house, and meanwhile, the three evaporators in the ice storage tank 13 control the flow direction of the refrigerant working medium through the electromagnetic valves, so that the three evaporators can make and store ice at different time intervals. The quantity of ice stored in the ice storage tank 13 is enough through the supplement of the commercial power, so that the cold quantity stored in the ice storage tank 13 can ensure that the cold quantity supplied to the fan coil 14 for melting ice and releasing cold meets the requirement of a refrigerator at night to be maintained within a set temperature range.

Working mode 3: in rainy and snowy weather, solar energy is insufficient in daytime, and under the condition of extremely small irradiance, the distributed photovoltaic independent energy can not generate enough electric quantity to drive the compressor 6 to work, and at the moment, a commercial power system is adopted. The compressor 6 is driven to work by commercial power, so that the cold energy released by the working operation of the air cooler 12 is cooled for the refrigeration house, meanwhile, the evaporators 15, 16 and 17 in the ice storage tank 13 respectively store the ice in the ice storage tank in different time intervals, and the sufficient ice amount is stored to ensure that the cold energy released by the ice amount can be used by the refrigeration house at night, so that the night temperature of the refrigeration house is maintained within a set temperature range.

And (3) circulation 1: as shown in fig. 4, the inlets of the refrigerating unit cycle immersed in the ice storage tank 13 are respectively connected with the three evaporators 20, 21 and 22 in series-parallel connection, and are respectively controlled to make and store ice by the diversion and reversing of the electromagnetic valve. The three evaporators are respectively connected with a main copper pipe, and an electromagnetic valve is arranged in front of each evaporator to control flow guide reversing. Working medium sequentially passes through the electromagnetic valve 15, the evaporator 20 and the gas-liquid separator 19, enters the air suction port of the compressor 6 and is sucked into the compressor 6; the air passes through the electromagnetic valve 16, passes through the evaporator 21, enters the air suction port of the compressor 6 through the gas-liquid separator 19 and is sucked into the compressor 6; after passing through the electromagnetic valve 17, the gas-liquid separator 19 enters the air suction port of the compressor 6 after passing through the evaporator 22, and is sucked into the compressor 6, thereby completing one cycle.

And (3) circulation 2: as shown in the attached figure 5, the working medium of the fan coil ice-melting and cold-releasing circulation in the ice storage tank 13 is adapted to the operation of the ice storage evaporator, passes through the electromagnetic valve 27 and the evaporator 23 through the working medium pump 18 and the electromagnetic valve 26, and enters the fan coil to release cold; the cold energy enters the fan coil pipe through the working medium pump 18, the electromagnetic valve 26, the electromagnetic valve 28 and the evaporator 24 to release the cold energy; enters the fan coil through the working medium pump 18, the electromagnetic valve 26, the electromagnetic valve 29 and the evaporator 25 to release cold energy, and completes a cycle.

In the cycle 1 and the cycle 2, the flow direction of the refrigerant working medium is just opposite to that of the heat exchange working medium, as shown in the attached drawings 4, 5 and 3, wherein the general evaporator structure in the ice storage tank and the flow directions of the refrigerant working medium and the heat exchange working medium can be clearly seen in the attached drawing 3.

The refrigerating unit is circulated, a refrigerant enters the oil separator 7 through the compressor 6 for separation, then enters the condenser 8, then enters the liquid storage device 9, then passes through the drying filter 10, enters the air cooler 12 through the proportion regulating valve 30 and the throttle expansion valve 11 for releasing cold energy, simultaneously the evaporator 20, the evaporator 21 and the evaporator 22 respectively make and store ice through the action of regulating the flow guide and reversing of a working medium by controlling the electromagnetic valve 15, the electromagnetic valve 16 and the electromagnetic valve 17, and then enters the air suction port of the compressor 6 through the gas-liquid separator 19 to be sucked into the compressor 6

Inside. Three evaporators are combined in series and parallel, so that the problem of supercooled ice can be solved, and the ice making and storing efficiency is improved.

The fan coil unit ice melting and cold releasing circulation is a heat exchange device, a working medium pump 18 pumps out a heat exchange working medium, the regulation is controlled through an electromagnetic valve 26, an electromagnetic valve 27, an electromagnetic valve 28 and an electromagnetic valve 29, the cold energy in the stored ice is sequentially transmitted to the fan coil unit 14 to be released, and the cold energy and the temperature of the refrigeration house are maintained to be stable.

The controller 2 is used to control the circuit.