CN201731694U - Dual working condition refrigeration storage system - Google Patents

Abstract

The utility model discloses a dual-working condition refrigeration cold-storage system, which comprises a compressor, a condenser, a liquid storage tank, a first electromagnetic expansion valve and an evaporator which are sequentially connected with the compressor, wherein a secondary refrigerant outlet of the evaporator is sequentially connected with a second electromagnetic expansion valve, an ice storage tank and a third electromagnetic expansion valve, the other end of the third electromagnetic expansion valve is connected with a secondary refrigerant inlet of the evaporator, one end of a fourth electromagnetic expansion valve is connected with the secondary refrigerant outlet of the evaporator, the other end of the fourth electromagnetic expansion valve is connected with a cooling coil pipe, the other end of the cooling coil pipe is connected with the secondary refrigerant inlet of the evaporator, one end of a pump is connected between the second electromagnetic expansion valve and the ice storage tank, the other end of the pump is connected between the fourth electromagnetic expansion valve and the cooling coil pipe, the fifth electromagnetic expansion valve is connected with the fourth electromagnetic expansion valve in parallel, the secondary refrigerant outlet, the temperature sensor is connected with the controller and the first electromagnetic expansion valve in sequence through leads. This patent technique changes traditional many host computers cold-storage system, has both reduced cold-storage system's initial investment, the energy saving again to can effectually provide reliable operation guarantee for energy storage system.

Description

Dual working condition refrigeration storage system

technical field

The utility model relates to a refrigeration and cold storage system, in particular to a dual-working-condition refrigeration and cold storage system adopted in an air-conditioning system.

Background technique

With the development of modern industry and the improvement of people's living standards. The application of central air-conditioning is becoming more and more extensive, and its power consumption is also increasing. In some large and medium-sized cities, the power consumption of central air-conditioning has accounted for more than 20% of its peak power consumption, which increases the peak-valley load difference of the power system. The load rate of the power grid has dropped, and the power grid has to implement power cuts, which seriously restricts industrial and agricultural production and has a lot of impact on people's normal life. One of the effective ways to solve this problem is to apply cold storage technology to transfer the power consumption of air conditioners from the peak period of the day to the trough period at night, so as to balance the load of the urban power grid and achieve the purpose of shifting peaks and filling valleys. The cold storage system uses the excess off-peak power of the power grid at night to continue to operate the refrigerator for cooling, and stores it in the form of ice, which melts the ice to provide air conditioning services during the peak power consumption during the day, thereby avoiding the peak power consumption of the central air conditioner. However, when the cooling load is large, the ice-melting cooling cannot meet the cooling load.

Utility model content

The purpose of this utility model is to overcome the above-mentioned defects in the prior art, and provide a dual-working-condition refrigeration and cold storage system, which can overcome the above-mentioned shortcomings of the existing cold storage system. run.

In order to achieve the above object, the technical solution provided by the utility model is as follows: construct a dual-working-condition refrigeration and cold storage system, including a compressor, a condenser connected to the compressor in sequence, a liquid storage tank, a first electromagnetic expansion valve, and an evaporator, The brine outlet of the evaporator is connected to the second electromagnetic expansion valve, the ice storage tank, and the third electromagnetic expansion valve in sequence, and the other end of the third electromagnetic expansion valve is connected to the brine inlet of the evaporator , one end of the fourth electromagnetic expansion valve is connected to the brine outlet of the evaporator, the other end is connected to the cooling coil, the other end of the cooling coil is connected to the brine inlet of the evaporator, and the pump One end is connected between the second electromagnetic expansion valve and the ice storage tank, the other end is connected between the fourth electromagnetic expansion valve and the cooling coil, the fifth electromagnetic expansion valve is connected in parallel with the fourth electromagnetic expansion valve, and the evaporator A temperature sensor is provided at the outlet of the brine, and the temperature sensor is connected with the controller and the first electromagnetic expansion valve in sequence by wires.

The beneficial effect of the dual-working-condition refrigeration and storage system of the utility model is that one host can cool at different evaporating temperatures, satisfying various operating states of ice-making and storage of the storage system and general air-conditioning refrigeration. It can be adjusted and operated under the conditions of ice storage refrigeration and ordinary air conditioning refrigeration. And the control system is adopted to accurately calculate the opening degree of the electromagnetic expansion valve and quickly reach the operating condition. This patented technology changes the traditional multi-host cold storage system, which not only reduces the initial investment of the cold storage system, but also saves energy, and can effectively provide reliable operation guarantee for the energy storage system. The application of the dual-working-condition refrigeration energy storage system will accelerate the popularization and use of the cold storage system and make a significant contribution to the balance of electricity.

The following is a further description of the dual-working-condition refrigeration and cold storage system of the present invention in conjunction with the accompanying drawings and embodiments:

Description of drawings

Fig. 1 is a schematic structural view of the dual-working-condition refrigeration and cold storage system of the present invention.

Detailed ways

Explanation of reference signs:

1. Compressor; 2. Condenser; 3. Liquid storage tank; 4. First electromagnetic expansion valve; 5. Evaporator; 6. Controller; 7. Second electromagnetic expansion valve; 8. Fourth electromagnetic expansion valve; 9. Ice storage tank; 10. Cooling coil; 11. Temperature sensor; 12. The third electromagnetic expansion valve; 13. The fifth electromagnetic expansion valve; 13. Pump; 14. Outlet of brine; 15. Inlet of brine .

The following are the best embodiments of the dual-working-condition refrigeration energy storage system described in the utility model, which does not limit the scope of protection of the utility model.

Referring to Fig. 1, there is provided a dual-working-condition refrigeration and cold storage system, including a compressor 1, a condenser 2 sequentially connected to the compressor 1, a liquid storage tank 3, a first electromagnetic expansion valve 4, and an evaporator 5, the evaporator The brine outlet 16 of the brine is connected to the second electromagnetic expansion valve 7, the ice storage tank 9, and the third electromagnetic expansion valve 12 in sequence, and the other end of the third electromagnetic expansion valve 12 is connected to the brine inlet of the evaporator 5 15, one end of the fourth electromagnetic expansion valve 8 is connected to the brine outlet 16 of the evaporator 5, and the other end is connected to the cooling coil 10, and the other end of the cooling coil 10 is connected to the evaporator 5 The brine inlet 15 is connected, one end of the pump 14 is connected between the second electromagnetic expansion valve 7 and the ice storage tank 9, the other end is connected between the fourth electromagnetic expansion valve 8 and the cooling coil 10, the fifth electromagnetic The expansion valve 13 is connected in parallel with the fourth electromagnetic expansion valve 8, and the brine outlet 16 of the evaporator 5 is provided with a temperature sensor 11, and the temperature sensor 11 is connected with the controller 6 and the first electromagnetic expansion valve 4 by wires. Connect sequentially.

The operation steps of the dual working condition refrigeration energy storage system:

At night, low-temperature ice-making and cold-storage operation is carried out during the low-power period. The fourth electromagnetic expansion valve 8 is closed, and the second electromagnetic expansion valve 7 is opened. The third electromagnetic expansion valve 12 is opened, and the fifth electromagnetic expansion valve 13 is closed. Turn on the compressor 1, the temperature sensor 11 collects the temperature of the brine outlet 16 to the controller 6, and the controller 6 judges and calculates the opening degree of the first electromagnetic expansion valve 4 to ensure that the temperature of the brine outlet 14 is kept at -3°C.

During the day, when the total cooling load required is less than 90% of the cold storage capacity of the ice storage tank 9, the compressor 1 is turned off, the second, third, and fourth electromagnetic expansion valves 7, 8, and 12 are turned off, and the pump 14 and the fifth electromagnetic expansion valve are turned on. valve 13. The cold energy in the ice storage tank 9 is introduced into the cooling coil 10 through the brine, and exchanges heat with the air to realize the cooling operation during the day.

When the cooling load required during the day exceeds 90% of the cold storage capacity of the ice storage tank 9, the fourth electromagnetic expansion valve 8 is opened, the compressor 1 is turned on, and it operates under the normal air-conditioning condition to supply cooling to the cooling coil 10. Supplement the cooling demand of the room.

Claims (2)

1. duplexing condition refrigeration and cold accumulation system, comprise compressor (1), the condenser (2) that is connected successively with compressor (1), fluid reservoir (3), first electromagnetic expanding valve (4), evaporimeter (5), it is characterized in that, the refrigerating medium of described evaporimeter outlet (16) successively with second electromagnetic expanding valve (7), Ice Storage Tank (9), the 3rd electromagnetic expanding valve (12) is connected, described the 3rd electromagnetic expanding valve (12) other end is connected with the refrigerating medium import (15) of described evaporimeter (5), the refrigerating medium outlet (16) of the 4th electromagnetic expanding valve (8) one ends and described evaporimeter (5) other end that is connected is connected with cooling coil (10), the other end of described cooling coil (10) is connected with the refrigerating medium import (15) of described evaporimeter (5), one end of pump (14) is connected between second electromagnetic expanding valve (7) and the Ice Storage Tank (9), the other end is connected between the 4th electromagnetic expanding valve (8) and the cooling coil (10), and the 5th electromagnetic expanding valve (13) is connected in parallel with the 4th electromagnetic expanding valve (8).

2. duplexing condition refrigeration and cold accumulation system according to claim 1, it is characterized in that, the refrigerating medium outlet (16) of described evaporimeter (5) is provided with temperature sensor (11), and described temperature sensor (11) is connected with controller (6), described first electromagnetic expanding valve (4) successively with lead.

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