Fluorine cold storage energy-saving system

Abstract

The utility model relates to the technical field of air conditioning equipment, in particular to a fluorine cold storage energy-saving system which comprises a refrigerating system, the refrigerating system comprises a compressor, a condenser, a fluorine pump, an expansion valve and an evaporator which are sequentially connected in series through a pipeline, and an outlet of the evaporator is connected with an inlet of the compressor; the first refrigerating system further comprises a cold storage module connected to the condenser in parallel through a pipeline, the cold storage module comprises an energy storage box, and a phase change material is arranged in the energy storage box. A plurality of switchable working modes can be set according to the conditions of electricity price and outdoor temperature; in one mode, a low-power fluorine pump system is used for replacing a compressor for operation, a low-electricity-price cold source is fully utilized, and the economic index of a unit is greatly increased; wherein one mode can reduce the condensing temperature, save the power consumption of the compressor and improve the energy efficiency ratio of the whole machine; wherein one mode is a double-engine mixed refrigeration mode, the fluorine pump pressurization system assists the compressor to operate, the condensation temperature is reduced, the power consumption of the compressor is reduced, and the energy efficiency ratio of the whole machine is increased.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning equipment technology, and in particular to a fluorine-based cold storage energy-saving system. Background Technology

[0002] With the development of the national economy, the power supply has become increasingly strained, and the peak-valley electricity price difference has become more pronounced. In order to stabilize the power grid, the government has introduced a peak-valley electricity pricing policy to encourage users to consume electricity during off-peak hours. Among these, air conditioning and other refrigeration equipment are major electricity consumers in daily work and life. Solving the problem of refrigeration equipment consuming electricity during off-peak hours is crucial to the successful implementation of the government's peak-valley electricity pricing policy.

[0003] In response, utility model application CN202322820461.0 discloses a refrigerant pump refrigeration system, including a condenser, a compressor, an evaporator, a refrigerant pump, a first liquid storage tank, a second liquid storage tank, an intermediate heat exchanger, a first control valve, and a second control valve. One end of the compressor is connected to one end of the evaporator; the other end of the evaporator is connected to one end of the refrigerant pump; the other end of the refrigerant pump is connected to one end of the first liquid storage tank; the other end of the first liquid storage tank is connected to one end of the condenser via the intermediate heat exchanger; the other end of the condenser is connected to the other end of the compressor; one end of the compressor is connected to the other end of the refrigerant pump via the second control valve, the first control valve, and the second liquid storage tank in sequence; and the other end of the compressor is connected to the refrigerant pump via the second control valve and the intermediate heat exchanger in sequence. This utility model utilizes the intermediate heat exchanger to subcool the main refrigerant, improving the cooling capacity and energy efficiency of the refrigerant pump refrigeration system in various operating modes.

[0004] Even when using the refrigerant pump mode and a lower indoor temperature is required, a significant amount of electricity is still consumed. This increases the power of the compressor or refrigerant pump, raising electricity costs and failing to meet the requirements for low energy efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a fluorine-based cold storage energy-saving system to address the shortcomings of existing technologies.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A fluorine-based cold storage energy-saving system includes a refrigeration system comprising a compressor, a condenser, an expansion valve, an evaporator, a fluorine pump, and piping. The compressor, condenser, fluorine pump, expansion valve, and evaporator are connected in series via piping, and the outlet of the evaporator is connected to the inlet of the compressor. The first refrigeration system also includes a cold storage module connected in parallel to the condenser via piping. The cold storage module includes an energy storage tank containing a phase change material, and valves are installed at both the inlet and outlet of the energy storage tank. The compressor is connected in parallel with a first check valve, and the fluorine pump is connected in parallel with a second check valve.

[0008] Furthermore: there are two refrigeration systems, which are arranged in parallel.

[0009] Furthermore: the valves include a first solenoid valve installed at the inlet of the energy storage box and a second solenoid valve installed at the outlet of the energy storage box.

[0010] Furthermore, a second expansion valve is installed at the inlet of the energy storage box, and the second expansion valve is connected to the outlet of the first solenoid valve.

[0011] Furthermore, both the first and second check valves are check valves.

[0012] Furthermore, the phase change material is a phase change cold storage coil arranged inside the energy storage box.

[0013] The beneficial effects of this utility model are as follows: multiple working modes can be set and switched according to electricity price and outdoor temperature; one mode uses a low-power refrigerant pump system to replace the compressor, making full use of the low-electricity-price cold source and greatly improving the unit's economic indicators; another mode can reduce the condensing temperature, save compressor power consumption, and improve the overall energy efficiency ratio; and another mode, in the "dual-engine hybrid cooling" mode, uses a refrigerant pump booster system to assist the compressor in operation, reduce the condensing temperature, save compressor power consumption, and improve the overall energy efficiency ratio. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a dual refrigeration system connected in parallel.

[0015] Figure 2 This is a schematic diagram of the refrigeration system.

[0016] The reference numerals in the figures include:

[0017] 1-Refrigeration system

[0018] 11-Compressor, 12-Condenser, 13-Expansion Valve, 14-Evaporator, 15-Freon Pump, 16-Pipeline

[0019] 17-First check valve, 18-Second check valve

[0020] 2-Cold storage module

[0021] 21-Energy storage box, 22-Phase change cold storage coil, 23-First solenoid valve, 24-Second solenoid valve

[0022] 25 - Second expansion valve. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings.

[0024] like Figure 1-2As shown, a fluorine-based cold storage energy-saving system includes a refrigeration system 1, which includes a compressor 11, a condenser 12, an expansion valve 13, an evaporator 14, a fluorine pump 15, and pipes 16. The compressor 11, condenser 12, fluorine pump 15, expansion valve 13, and evaporator 14 are connected in series via pipes 16. The outlet of the evaporator 14 is connected to the inlet of the compressor 11. The refrigeration system 1 also includes a cold storage module 2 connected in parallel to the condenser 12 via pipes 16. The cold storage module 2 includes an energy storage tank 21, which contains a phase change material. Valves are installed at both the inlet and outlet of the energy storage tank 21. The compressor 11 is connected in parallel with a first one-way valve 17, and the fluorine pump 15 is connected in parallel with a second one-way valve 18.

[0025] In Mode 1, when the outdoor temperature is 5 degrees Celsius higher than the set temperature, during the hot season, the first one-way valve 17 closes, the compressor 11 operates, the second one-way valve 18 opens, the refrigerant pump 15 stops operating, and the refrigerant passes through the compressor 11 and condenser 12 sequentially via pipeline 16. After passing through the condenser 12, a portion of the refrigerant enters the expansion valve 13 and evaporator 14 sequentially for cooling; the other portion of the refrigerant enters the energy storage tank 21 for cooling and storage. At the same time, the outlet valve of the energy storage tank 21 closes to absorb the heat from the refrigerant. In this mode, the low-power refrigerant pump 15 system replaces the compressor 11, making full use of the low-electricity-price cooling source and greatly improving the unit's economic indicators.

[0026] In Mode 2, during periods of high electricity prices, the first one-way valve 17 opens, the compressor 11 closes, the second one-way valve 18 closes, and the refrigerant pump 15 starts operating. A low-power refrigerant pump 15 performs forced convection circulation of the refrigerant, achieving continuous cooling of the indoor evaporator 14 and continuous heat dissipation of the outdoor condenser 12. This provides the same cooling capacity as the compressor 11, reducing the compressor 11's operating time and achieving energy savings. Simultaneously, the outlet valve of the energy storage tank 21 opens, releasing the heat absorbed within the tank, which is then transferred through the condenser 12 to the expansion valve 13 and the evaporator 14 for cooling. This mode reduces the condensing temperature, saves power consumption of the compressor 11, and improves the overall energy efficiency ratio.

[0027] In Mode 3, when the outdoor temperature is lower than the set temperature, the first one-way valve 17 closes, the compressor 11 operates, the second one-way valve 18 closes, and the refrigerant pump 15 operates. This dual-mode operation uses the refrigerant pump 15 to assist the compressor 11, reducing the condensing temperature, saving power consumption, and improving the overall energy efficiency ratio. Simultaneously, the outlet valve of the energy storage tank 21 opens, releasing the heat absorbed within it, which is then transferred through the condenser 12 to the expansion valve 13 and evaporator 14 for cooling. In this "dual-engine hybrid cooling" mode, the refrigerant pump 15 booster system assists the compressor 11, reducing the condensing temperature, saving power consumption, and improving the overall energy efficiency ratio.

[0028] Preferably, the energy storage box 21 has an insulation layer on its walls or inside.

[0029] Preferably, the insulation layer can be made of polyurethane, polystyrene, fiberglass wool, PE wool, or other insulation materials. The insulation layer mainly serves to insulate the energy storage box 21, reducing heat exchange between the energy storage device and the outside environment.

[0030] Phase change materials (PCMs) can be configured as either liquid or solid phase change materials, such as water, salt solutions, or other commercially available phase-change chemical materials, primarily responsible for storing cold energy. PCMs can change from liquid to solid, or vice versa.

[0031] Phase change materials (PCMs) possess the ability to change their physical state within a certain temperature range. Taking solid-liquid phase change as an example, when heated to the melting temperature, a phase change occurs from solid to liquid. During melting, the PCM absorbs and stores a large amount of latent heat. When the PCM cools, the stored heat dissipates into the environment within a certain temperature range, undergoing a reverse phase change from liquid to solid. The energy stored or released during these two phase change processes is called the latent heat of phase change. When the physical state changes, the material's temperature remains almost constant until the phase change is complete, forming a broad temperature plateau. Although the temperature remains constant, the absorbed or released latent heat is considerable.

[0032] Preferably, there are two refrigeration systems 1, which are arranged in parallel. The two refrigeration systems 1 together have two compressors 11, two refrigerant pumps 15 and two cold storage modules 2. In working mode two and working mode three, the cold storage module 2 can release the heat absorbed by one or two energy storage boxes 21 according to the indoor temperature demand, further increasing the overall practicality.

[0033] The valves include a first solenoid valve 23 installed at the inlet of the energy storage tank 21 and a second solenoid valve 24 installed at the outlet of the energy storage tank 21; the first solenoid valve 23 can control whether the refrigerant after passing through the condenser 12 enters the energy storage tank 21 for heat absorption; the second solenoid valve 24 can detect whether the heat in the energy storage tank 21 is released into the condenser 12, and then flows into the expansion valve 13 and evaporator 14 installed indoors.

[0034] Furthermore, a second expansion valve 25 is installed at the inlet of the energy storage box 21. The second expansion valve 25 is connected to the outlet of the first solenoid valve 23. The second expansion valve 25 allows the medium-temperature and high-pressure liquid refrigerant to be throttled into low-temperature and low-pressure wet vapor, which can be better absorbed by the phase-change material when it enters the energy storage box 21.

[0035] Preferably, both the first one-way valve 17 and the second one-way valve 18 are check valves. The function of a check valve is to allow refrigerant to flow in only one direction and prevent flow in the opposite direction. Typically, such valves operate automatically. Under the pressure of the fluid flowing in one direction, the valve disc opens; when the refrigerant flows in the opposite direction, the fluid pressure and the weight of the valve disc combine to act on the valve seat, thereby cutting off the flow.

[0036] Preferably, the phase change material is a phase change cold storage coil 22 arranged in the energy storage box 21; the phase change cold storage coil is arranged meanderingly in the energy storage box 21, which can further increase the heat absorption when low temperature and low pressure wet steam passes through.

[0037] In summary, this utility model possesses the aforementioned excellent characteristics, enabling it to achieve unprecedented efficiency in use and thus become a highly practical product.

[0038] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fluorine-based cold storage energy-saving system, comprising a refrigeration system, the refrigeration system including a compressor, a condenser, an expansion valve, an evaporator, a fluorine pump, and piping, wherein the compressor, condenser, fluorine pump, expansion valve, and evaporator are connected in series via piping, and the outlet of the evaporator is connected to the inlet of the compressor; characterized in that: The fluorine cold storage energy-saving system also includes a cold storage module connected in parallel to the condenser via a pipeline. The cold storage module includes an energy storage tank, which contains a phase change material. Valves are installed at both the inlet and outlet of the energy storage tank. The compressor is connected in parallel with a first check valve, and the fluorine pump is connected in parallel with a second check valve.

2. The fluorine-based cold storage energy-saving system according to claim 1, characterized in that: The number of refrigeration systems is two, and the two refrigeration systems are arranged in parallel.

3. The fluorine-based cold storage energy-saving system according to claim 2, characterized in that: The valves include a first solenoid valve installed at the inlet of the energy storage tank and a second solenoid valve installed at the outlet of the energy storage tank.

4. The fluorine-based cold storage energy-saving system according to claim 3, characterized in that: A second expansion valve is also installed at the inlet of the energy storage box, and the second expansion valve is connected to the outlet of the first solenoid valve.

5. The fluorine-based cold storage energy-saving system according to claim 2, characterized in that: Both the first check valve and the second check valve are check valves.

6. The fluorine-based cold storage energy-saving system according to claim 2, characterized in that: The phase change material is a phase change cold storage coil arranged inside the energy storage box.

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