CN215983354U - Secondary refrigerant circulating system - Google Patents
Secondary refrigerant circulating system Download PDFInfo
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- CN215983354U CN215983354U CN202122053880.7U CN202122053880U CN215983354U CN 215983354 U CN215983354 U CN 215983354U CN 202122053880 U CN202122053880 U CN 202122053880U CN 215983354 U CN215983354 U CN 215983354U
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Abstract
The utility model relates to the field of secondary refrigerants, in particular to a secondary refrigerant circulating system. The system includes two or more circulation paths for different coolants and are in heat transfer communication with each other; the circulating route of the first secondary refrigerant at least comprises a first route, and the first route comprises an air-cooled condenser, a throttle valve, a heat exchanger and a compressor which are sequentially connected to form a cycle, wherein the heat exchanger is used for carrying out heat transfer with the second secondary refrigerant; the circulation route of the second secondary refrigerant at least comprises a fourth route, and the fourth route comprises a heat exchanger and a secondary cooling fan which are sequentially connected to be circulated. The secondary refrigerant circulating system can coordinate different secondary refrigerant circulating routes, can meet the temperature requirements of a plurality of refrigeration points, can fully utilize cold energy, and can be used for testing the performance of the secondary refrigerant.
Description
Technical Field
The utility model relates to the field of secondary refrigerants, in particular to a secondary refrigerant circulating system.
Background
The use of cold energy in today's society is very common, such as air conditioners, refrigerators, freezers, and the like. The current use mode of the cold energy is usually a very simple circuit, namely, the circuit applies the cold energy to the secondary refrigerant by using the external energy, the secondary refrigerant releases the cold energy to the cold storage and applies the cold energy to the secondary refrigerant by using the external energy again is suitable for most current situations.
However, in more complex situations, for example, where there are multiple locations in the system where temperature regulation is required, and where the temperature requirements vary greatly, different coolants may be used; or in another case, a different coolant would flow in a system dedicated to testing coolant performance.
In these complex situations, the existing cold energy usage methods show significant drawbacks: the existing method can only utilize single secondary refrigerant in a single thread way respectively, and cold energy of different secondary refrigerants can not be exchanged in different routes, so that much cold energy is wasted, and external energy is consumed to prepare the cold energy.
Therefore, it is very meaningful to design a cold energy circulation system which can be adapted to the complex requirements.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to overcoming the above problems of the prior art and to providing a coolant circulation system. The secondary refrigerant circulating system can coordinate different secondary refrigerant circulating routes, can meet the temperature requirements of a plurality of refrigeration points, can fully utilize cold energy, and can be used for testing the performance of the secondary refrigerant.
To achieve the above objects, the present invention provides a coolant circulation system including two or more coolant circulation paths in heat transfer communication with each other; the system comprises at least a first coolant circulation line and a second coolant circulation line, wherein the first coolant circulation line comprises at least a first line comprising an air-cooled condenser for imparting cooling energy to the first coolant using air energy, a first throttle valve for reducing the temperature of the first coolant, a heat exchanger for heat transfer with the second coolant, and a compressor for pressurizing the gaseous first coolant, which are connected in series to form a cycle; the circulation route of the second secondary refrigerant at least comprises a fourth route, and the fourth route comprises a heat exchanger and a secondary cooling fan which are sequentially connected into a circulation mode.
In one example, the first coolant circulation circuit further comprises a second circuit comprising an air-cooled condenser interconnected in a cycle, a second throttle for reducing the temperature of the first coolant, a cold storage tank for transferring heat to the second coolant and allowing the second coolant to store cold energy, and a compressor.
In one example, the circulation path for the first coolant carrier further comprises a third circuit comprising an air-cooled condenser interconnected in circulation, a third throttle valve for reducing the temperature of the first coolant, a direct-cooled air cooler for discharging cold energy into the refrigerated compartment, and a compressor.
In one example, the first line, the second line, and the third line are switched with each other.
In one example, the second coolant circulation circuit further comprises a fifth circuit including a cold storage tank and a cold carrier cold air blower connected to each other in a circulation.
In one example, the fourth line and the fifth line are switched with each other.
In one example, the circulation route of the second coolant further comprises a sixth line, and the sixth line comprises a heat exchanger and a cold accumulation tank which are connected with each other in a circulating or one-way communication mode.
In one example, the circulation route of the second secondary refrigerant also comprises a seventh route, and the seventh route comprises a heat exchanger, a cold accumulation tank and a cold-carrying cold air blower which are communicated in a single direction.
In one example, the system is a system for testing the performance of the coolant carrier, and a plurality of test points are further arranged in the system, and the material and the physical and chemical properties of the heat exchange tubes in the test points are different from each other.
In one example, the cold storage tank includes: a tank body; a first coolant inlet manifold for introducing a first coolant from the exterior into the cold storage tank; the first secondary refrigerant output header pipe is used for outputting the secondary refrigerant after heat exchange to the outside; and the inlets of the first secondary refrigerant branch pipes are connected with the first secondary refrigerant input header pipe, and the outlets of the first secondary refrigerant branch pipes are connected with the first secondary refrigerant output header pipe, so that the contact area of the first secondary refrigerant for heat exchange in the cold storage tank is increased.
Through the technical scheme, compared with the prior art, the utility model at least has the following advantages:
(1) the system can operate various refrigerating medium circulation lines, and cold energy flows among the circulation lines, so that the cold energy can be fully utilized;
(2) the system can provide cold energy for a plurality of refrigerating chambers under different conditions;
(3) the system can fully utilize natural energy (such as air energy), convert the natural energy into cold energy to supply cold to the refrigerating room, and store redundant cold energy so as to be used when the natural energy is insufficient, thereby fully utilizing resources, saving energy to the maximum extent and reducing cost;
(4) the refrigerants commonly used in the prior art are refrigerants that undergo a gas-liquid phase change (such as the first refrigerants of the present invention), typically greenhouse gases such as freon; the secondary refrigerant with gas-liquid phase change in the system of the utility model has smaller proportion, and the secondary refrigerant with liquid-solid phase change (such as the second secondary refrigerant) has larger proportion, thereby greatly reducing the use of greenhouse gas (for example, several tons of Freon are needed according to the conventional mode, and the utility model only needs dozens of kilograms of Freon), and making outstanding contribution to environmental protection;
(5) the system can be used as a system for testing the performance of the secondary refrigerant at the same time, or on the basis of the system for testing the performance of the secondary refrigerant originally, the system makes full use of various secondary refrigerants which originally flow in the system, so that the secondary refrigerants are mutually coordinated, the refrigeration requirements of the system can be met, a refrigeration house can be additionally arranged for external use, the refrigeration cost of the system is saved, and the extra commercial value is brought;
(6) the system can reasonably distribute and call the cold energy by storing the cold energy, thereby effectively reducing the energy consumption cost of the refrigeration system; for example, the cold energy is stored by the second coolant during the valley power (the period of low electricity rate, usually at night) and the stored cold energy is used during the peak power (the period of high electricity rate), thereby significantly reducing the electricity consumption.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
Drawings
Fig. 1 is a schematic view of a coolant circulation system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A coolant circulation system according to an embodiment of the present invention will be described with reference to fig. 1.
According to one embodiment, the coolant circulation system includes circulation paths for two or more different coolants in heat transfer communication with each other.
The system of the present invention comprises two or more different coolants each having its own circulation path, and one of the coolant circulation paths may include one or more circuits that circulate individually and that are in direct fluid communication with each other or in non-contact heat transfer.
Communication between the various coolant circulation paths cannot occur in a direct mixing manner, and communication can occur by non-contact heat transfer (e.g., between the inside and outside of the tubes, which have heat transfer properties).
The system flows at least two secondary refrigerants, namely a first secondary refrigerant and a second secondary refrigerant.
The system includes at least a first coolant circulation circuit and a second coolant circulation circuit.
The first coolant circulates in at least one or more of the first circuit, the second circuit, and the third circuit.
The circulation path for the first coolant includes at least a first circuit including an air-cooled condenser 303 for imparting cooling energy to the first coolant using air energy, a first throttle valve 601 for lowering the temperature of the first coolant, a heat exchanger 301 for heat transfer with the second coolant, and a compressor 302 for pressurizing the gaseous first coolant, which are connected in series in a circulation.
According to one embodiment, the first line comprises: (1) the main equipment comprises an air-cooled condenser 303 and a heat exchanger 301; (2) a pipeline connecting the main devices; and (3) auxiliary equipment through which the pipeline passes, including the first throttle 601, the accumulator 304, and the compressor 302. In the first circuit, a first coolant circulates between the air-cooled condenser 303 and the heat exchanger 301. In the heat exchanger 301, heat transfer occurs between the first coolant in liquid form and the second coolant in a non-mixed manner (e.g., the first coolant flows through a tube, the second coolant submerges the tube, and the tube has heat transfer properties), the first coolant transfers cooling energy to the second coolant, the temperature of the second coolant is reduced, and the first coolant vaporizes into gas. The gaseous first coolant is compressed in the compressor 302 and introduced into the air-cooled condenser 303 along the pipe 711, the first coolant is cooled and liquefied in the air-cooled condenser 303, and the liquid first coolant is throttled (temperature reduced) by the first throttle valve 601 after being buffered in the accumulator 304 along the pipe 712 and then returned to the heat exchanger 301, thereby circulating. The first line is performed in the refrigerating main unit 300.
In one example, the first coolant circulation circuit can further comprise a second circuit comprising an air-cooled condenser 303 interconnected in a cycle, a second throttle 602 for reducing the temperature of the first coolant, a cold storage tank 500 for transferring heat to the second coolant and storing cold energy in the second coolant, and a compressor 302. The primary function of this second circuit is at least to transfer the cold energy in the first coolant to the second coolant, which converts the second coolant to a solid phase, thereby storing the cold energy in the cold storage tank 500 for use.
According to a particular embodiment, the second line comprises: (1) the main equipment comprises an air-cooled condenser 303 and a cold accumulation tank 500; (2) a pipeline connecting the main devices; and, (3) auxiliary equipment through which the piping passes, including the second throttle 602, the accumulator 304, and the compressor 302. In the cold storage tank 500, the first cold carrier liquid and the second cold carrier liquid are in non-contact heat transfer (for example, the first cold carrier liquid is located in the pipeline, the second cold carrier liquid submerges the pipeline, and the pipeline has heat transfer performance); through this heat transfer, the first cold-carrying liquid transfers cold energy to the second cold-carrying liquid, the first cold-carrying liquid changes phase to gas, and at least part of the second cold-carrying liquid changes phase to solid to store the cold energy in the cold storage tank 500; the gaseous first coolant enters the compressor 302 along conduit 718, conduit 716 and conduit 722, is compressed and enters the air-cooled condenser 303 along conduit 711, is cooled and liquefied in the air-cooled condenser 303, and flows along conduit 712, along conduit 721, conduit 715 and conduit 717 after being buffered by the accumulator 304, is throttled (temperature reduced) by the second throttle 602 before entering the cold storage tank, and then enters the cold storage tank 500 again for heat transfer, thereby circulating.
In one example, the circulation path for the first coolant can further include a third circuit including an air cooled condenser 303, a third throttle 603 for reducing the temperature of the first coolant, a direct cooled air cooler 401 for discharging cold energy into the cold room, and a compressor 302 interconnected in a cycle. The main function of the third circuit is to cool the refrigerating chamber by using the cold energy in the first cold-carrying liquid.
According to a particular embodiment, the third circuit comprises: (1) main equipment including an air-cooled condenser 303 and a direct-cooled air-cooler 401 located in the refrigerating compartment 400; (2) a pipeline connecting the main devices; and, (3) auxiliary equipment through which the piping passes, including the third throttle 603, the accumulator 304, and the compressor 302. In the third circuit, the first cold carrier liquid obtains cold energy in the air-cooled condenser 303, flows along the pipeline 712 after being buffered by the liquid reservoir 304 sequentially, flows along the pipeline 715 and the pipeline 713, is throttled (temperature is reduced) by the third throttle valve 603 before entering the heat exchange tube, then enters the direct-cooling air cooler 401 to release the cold energy into the refrigerating chamber, the first cold carrier liquid which is changed into a gas phase sequentially enters the compressor 302 along the pipeline 714, the pipeline 716 and the pipeline 722 and enters the air-cooled condenser 303 along the pipeline 711, and the first cold carrier liquid is cooled and liquefied in the air-cooled condenser 303 and then circulates back and forth.
It can be seen that the first, second and third lines share an air cooled condenser 303, a compressor 302 and an accumulator 304. Therefore, the first line, the second line and the third line can be in a mutual switching relationship, and can also be operated simultaneously by arranging pipeline flow dividing and valve control.
The second coolant circulates in at least the fourth circuit and/or the fifth circuit.
The circulation route of the second coolant includes at least a fourth route including a heat exchanger 301 and a cold carrier fan 402 in the refrigerating compartment 400, which are sequentially connected to be circulated. The main function of the fourth circuit is to cool the refrigerating chamber by using the cold energy in the second cold carrying liquid.
According to a particular embodiment, the fourth line comprises: (1) primary equipment including a heat exchanger 301 and a cold-carrying cold air blower 402 located in the cold room 400; (2) a pipeline connecting the main devices; and (3) auxiliary equipment through which the piping passes, including primary freeze pump 611. In the fourth circuit, the second coolant undergoes non-contact heat transfer with the first coolant in heat exchanger 301, acquires the cold energy of the first coolant, is reduced in temperature, and then enters the cold carrier cold air blower 402 along conduit 733 and conduit 741, where the second coolant releases the cold energy into the refrigeration compartment 400, and then the second coolant, having an increased temperature, returns to heat exchanger 301 along conduits 734, 738, and 732 in turn to acquire the cold energy again, thereby cycling. This fourth line is driven by a primary freeze pump 611.
In one example, the second coolant circulation circuit can further include a fifth circuit including a cold storage tank 500 and a cold-carrying cold air blower 402 connected to each other in a circulation. The main function of the fifth circuit is to utilize the cold energy stored in the cold storage tank to cool the refrigerating chamber.
According to a specific embodiment, the fifth circuit comprises: (1) primary devices including a cold storage tank 500 and a cold-carrying cold air blower 402 located in the refrigerating compartment 400; (2) a pipeline connecting the main devices; and (3) auxiliary equipment through which the piping passes, including a secondary freeze pump 612. In the fifth circuit, the cold storage tanks 500 store the second cold-carrying liquid solidified by obtaining the cold energy of the first cold-carrying liquid, and the second cold-carrying liquid is transformed into a liquid state by melting (usually spontaneous melting) and then enters the cold-carrying cold air blower 402 along the pipes 736 and 741, where the second coolant releases the cold energy into the refrigerating chamber 400, and then the second coolant with increased temperature returns to the cold storage tanks along the pipes 734 and 737 in turn to obtain the cold energy again, thereby circulating. This fifth line is driven by a secondary freeze pump 612.
It can be seen that the fourth and fifth circuits share the cold-carrying cooling fan 402, and therefore are usually switched to operate, and in a few cases can be operated simultaneously.
The fourth and fifth lines are normally operating lines, and in some cases the fourth and fifth lines may be linked, for example as shown by the sixth and/or seventh lines.
In one example, the circulation route of the second coolant further includes a sixth line including a heat exchanger 301 and a cold accumulation tank 500 connected to each other in a circulating or unidirectional communication. The circuit is used for storing the second coolant in the heat exchanger 301 into the cold storage tank 500 or adjusting the amount of the second coolant in the heat exchanger 301 and the cold storage tank 500.
According to a specific embodiment, the sixth line comprises: (1) a main device including a heat exchanger 301 and a cold storage tank 500; and (2) a pipeline connecting the main devices. In the first case, the sixth circuit is a one-way circuit from heat exchanger 301 to the cold storage tank 500, i.e., the second coolant from heat exchanger 301 enters cold storage tank 500 along conduit 731 and conduit 735; the purpose of this circuit is to transfer the second coolant in the heat exchanger 301 to the cold storage tank 500 for storage in the solid phase. In the second case, the sixth circuit is a circulating circuit between the heat exchanger 301 and the cold storage tank 500, and aims to adjust the amounts of the cold energy and the second coolant.
In one example, the second coolant circulation circuit further includes a seventh circuit including a heat exchanger 301, a cold storage tank 500, and a cold carrier cold blower 402, which are in communication with each other. The fourth circuit is connected to the fifth circuit in a seventh circuit for adjusting the amount of cooling energy and the second coolant.
According to a specific embodiment, the seventh circuit comprises (1) a main device comprising a heat exchanger 301, a cold storage tank 500 and a cold-carrying cold air blower 402; and (2) a pipeline connecting the main devices. For example, the seventh circuit is a one-way circuit from heat exchanger 301 to cold carrier cold blower 402 to cold storage tank 500, i.e., the second coolant from heat exchanger 301 passes along conduit 731, conduit 733, and conduit 741 into cold carrier cold blower 402, where it releases cold energy into the cold storage compartment, and then passes along conduit 734 and conduit 737 into cold storage tank 500, where it is harvested for storage or participation in other circuits including cold storage tank 500.
In one example, the system is also a system for testing the performance of a coolant carrier. In other words, the system is improved to be capable of simultaneously supplying cooling based on the system originally used for testing the performance of the coolant carrier. Therefore, the secondary refrigerant to be tested originally flows in the pipeline of the system, and the system can fully utilize the cold energy in the secondary refrigerants while testing various secondary refrigerants, realize the low-temperature control of one or more refrigerating chambers, greatly save the secondary refrigerant amount required for maintaining the operation of the system, greatly reduce the using amount of the conventional secondary refrigerant represented by Freon, reduce the carbon emission and is more environment-friendly; and even to lease the refrigerator to the outside for commercial benefit.
Both the sixth and seventh circuits can be used to replace the second coolant with a new one.
The system can also be provided with a plurality of test points for testing the coolant, and the test points can be provided with different environments, for example, the heat exchange tubes can be made of different materials (such as carbon steel, aluminum and the like), have different shapes (such as tubes, fins and the like), have different lengths and the like, or provide different temperature requirements.
In the present invention, the terms "piping" and "pipeline" have the same meaning, and include fittings disposed on the piping, such as switches, flow valves, pressure gauges, etc., and test devices required when the system is used as a system for testing the performance of the refrigerant carrier. These fittings are conventionally provided in the art and are not fully shown in the drawings.
The coolant can be any coolant conventional in the art that changes temperature and/or phase in the system in response to the flow of heat. Typically, the first coolant is a coolant capable of undergoing a phase change between a gas phase and a liquid phase in an operating environment, and the second coolant is a coolant capable of undergoing a phase change between a liquid phase and a solid phase in an operating environment (although a phase change is not required, and a liquid may be maintained throughout the system). Typically a greenhouse gas such as freon in the first coolant and a second coolant such as brine (NaCl solution), ethylene glycol, etc. The secondary refrigerant capable of carrying out gas-liquid phase change has the advantage of easy temperature reduction (temperature reduction of dozens of degrees can be realized through a throttle valve), so that the secondary refrigerant is widely used in the prior art, but the secondary refrigerant capable of carrying out gas-liquid phase change also has obvious defects, such as easy leakage and obvious irreversible damage to the atmosphere; however, the refrigerant undergoing the liquid-solid phase change is rarely utilized by the prior art because the low temperature state does not have a stable eutectic point, which leads to the disadvantages of easy energy waste in the cold storage and cold energy exchange processes, and generally requires a large initial investment. In the system, the refrigerating medium (first refrigerating medium) for gas-liquid phase change has a small occupation ratio, and the refrigerating medium (such as second refrigerating medium) for liquid-solid phase change has a large occupation ratio, so that the use of greenhouse gases is greatly reduced (for example, several tons of Freon are needed in a conventional mode, and only dozens of kilograms of Freon are needed), and the system makes a remarkable contribution to environmental protection. Under the condition that the system is used for testing the performance of the secondary refrigerant, the cold energy circulating system is carried out by using the liquid-solid phase change refrigerant (second secondary refrigerant) which circulates in the system, so that the investment cost is not increased remarkably; the cold energy circulating system of the utility model does not waste energy when used for the liquid-solid phase change refrigerant, but fully utilizes the cold energy existing in the system.
Example 1
The coolant circulation system shown in fig. 1 comprises a first coolant circulation route and a second coolant circulation route which are in heat transfer communication with each other; wherein the content of the first and second substances,
the circulation route of the first refrigerating medium comprises a first circuit, a second circuit and a third circuit;
the first circuit comprises an air-cooled condenser 303 for imparting cooling energy to the first coolant using air energy, a throttle valve for reducing the temperature of the first coolant, a heat exchanger 301 for heat transfer with the second coolant, and a compressor 302 for pressurizing the gaseous first coolant, connected in series;
the second circuit comprises an air-cooled condenser 303, a throttle valve, a cold storage tank 500 for heat transfer with the second coolant and for the second coolant to store cold energy, and a compressor 302, which are interconnected in a cycle;
the third line includes an air-cooled condenser 303, a throttle valve, a direct-cooled air-cooler 401 for discharging cold energy to the refrigerating chamber, and a compressor 302 connected to each other in a cycle;
the second refrigerating medium circulation route comprises a fourth route, a fifth route, a sixth route and a seventh route;
the fourth line comprises a heat exchanger 301 and a cold-carrying cold air blower 402 which are sequentially connected into a cycle and are positioned in the refrigerating chamber 400;
the fifth circuit includes a cold storage tank 500 and a cold-carrying cold air blower 402 connected to each other in a cycle;
the sixth line comprises a heat exchanger 301 and a cold accumulation tank 500 which are connected with each other in a circulating or one-way communication manner;
the seventh line comprises a heat exchanger 301, a cold accumulation tank 500 and a cold-carrying cold air blower 402 which are communicated with each other;
and the system is simultaneously used for testing the performance of the coolant carrier, and a plurality of test points are also arranged in the system, and different environments are arranged on the test points, for example, the heat exchange tubes can be arranged to be made of different materials (such as carbon steel, aluminum and the like), different shapes (such as tubes, fins and the like), different lengths and the like, or different temperature requirements are provided.
Example 2
This example illustrates the coolant operating in the system of example 1 and the phase change and temperature change of the coolant occurring in the system.
The first coolant circulation circuit includes:
in the first circuit, the first coolant is in a liquid state with the temperature of 40 +/-10 ℃ when leaving the air-cooled condenser 303, is in a liquid state with the temperature of 40 +/-10 ℃ in the reservoir 501, is in a liquid state with the temperature of-45 +/-3 ℃ after passing through the first throttling valve 601, undergoes phase change (but almost no temperature change) in the heat exchanger 301, leaves the heat exchanger 301 in a gaseous state with the temperature of-45 +/-3 ℃, is compressed and heated to 60 +/-10 ℃ in the compressor 302, then enters the air-cooled condenser 303, is liquefied by the reduction of the heat temperature carried by wind, and thus the cycle is repeated.
In the second circuit, the first coolant is in a liquid state with the temperature of 40 +/-5 ℃ when leaving the air-cooled condenser 303, is in a liquid state with the temperature of 40 +/-5 ℃ in the liquid storage device 304, is in a liquid state with the temperature of-45 +/-3 ℃ after passing through the second throttling valve 602, undergoes phase change (but almost no temperature change) in the cold accumulation tank 500, leaves the heat exchanger 301 in a gas state with the temperature of-45 +/-3 ℃, is compressed and heated to 60 +/-10 ℃ in the compressor 302, then enters the air-cooled condenser 303, is liquefied by the temperature reduction of heat carried away by wind, and thus the cycle is repeated.
In the third circuit, the first coolant leaves the air-cooled condenser 303 as a liquid with the temperature of 40 plus or minus 5 ℃, is 40 plus or minus 5 ℃ in the liquid storage 501, is suddenly reduced to-40 plus or minus 5 ℃ after passing through the third throttle 603, releases the cooling energy in the direct-cooled air cooler 401 to undergo phase change (but the temperature is almost unchanged), leaves the direct-cooled air cooler 401 as a gas with the temperature of-40 plus or minus 5 ℃, is compressed and heated to 60 plus or minus 10 ℃ in the compressor 302, then enters the air-cooled condenser 303 to be liquefied by the reduction of the heat temperature carried by the wind, and thus the cycle is repeated.
The second coolant circulation line includes:
the second secondary refrigerant in the fourth line is not subjected to phase change and is always in a liquid phase, the temperature of the second secondary refrigerant leaving the heat exchanger 301 is minus 40 +/-2 ℃, the second secondary refrigerant enters the cold-carrying cold air blower 402 to release cold energy, the temperature is increased to minus 37 +/-2 ℃, and the second secondary refrigerant returns to the heat exchanger 301 to obtain the cold energy of the first secondary refrigerant, so that the cycle is repeated.
In the fifth circuit, the second coolant leaves the cold carrier cold air blower 402 at a temperature of-37 ± 2 ℃, enters the cold storage tank 500 to transfer heat with the first coolant, and the temperature is reduced to-40 ± 2 ℃ to become a low-temperature liquid to continue to participate in the cycle.
In the sixth circuit, the temperature of the second coolant leaving the heat exchanger 301 is-40 ± 2 ℃, and the second coolant enters the cold storage tank 500 to become a low-temperature liquid and continuously participate in the circulation.
The seventh circuit refers to the fifth circuit and the sixth circuit, and details thereof are not repeated.
Through the technical scheme, compared with the prior art, the utility model at least has the following advantages:
(1) the system can operate various refrigerating medium circulation lines, and cold energy flows among the circulation lines, so that the cold energy can be fully utilized;
(2) the system can provide cold energy for a plurality of refrigerating chambers under different conditions;
(3) the system can fully utilize natural energy (such as air energy), convert the natural energy into cold energy to supply cold to the refrigerating room, and store redundant cold energy so as to be used when the natural energy is insufficient, thereby fully utilizing resources, saving energy to the maximum extent and reducing cost;
(4) the refrigerants commonly used in the prior art are refrigerants that undergo a gas-liquid phase change (such as the first refrigerants of the present invention), typically greenhouse gases such as freon; the secondary refrigerant with gas-liquid phase change in the system of the utility model has smaller proportion, and the secondary refrigerant with liquid-solid phase change (such as the second secondary refrigerant) has larger proportion, thereby greatly reducing the use of greenhouse gas (for example, several tons of Freon are needed according to the conventional mode, and the utility model only needs dozens of kilograms of Freon), and making outstanding contribution to environmental protection;
(5) the system can be used as a system for testing the performance of the secondary refrigerant at the same time, or on the basis of the system for testing the performance of the secondary refrigerant originally, the system makes full use of various secondary refrigerants which originally flow in the system, so that the secondary refrigerants are mutually coordinated, the refrigeration requirements of the system can be met, a refrigeration house can be additionally arranged for external use, the refrigeration cost of the system is saved, and the extra commercial value is brought;
(6) the system can reasonably distribute and call the cold energy by storing the cold energy, thereby effectively reducing the energy consumption cost of the refrigeration system; for example, the cold energy is stored by the second coolant during the valley power (the period of low electricity rate, usually at night) and the stored cold energy is used during the peak power (the period of high electricity rate), thereby significantly reducing the electricity consumption.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the utility model, many simple modifications can be made to the technical solution of the utility model, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the utility model, and all fall within the scope of the utility model.
Claims (10)
1. A coolant circulation system comprising circulation paths for two or more different coolants in heat transfer communication with each other; the system comprises at least a first coolant circulation line and a second coolant circulation line, wherein,
the circulation route of the first coolant comprises at least a first circuit which comprises an air-cooled condenser for applying cold energy to the first coolant by using air energy, a first throttle valve for reducing the temperature of the first coolant, a heat exchanger for heat transfer with the second coolant and a compressor for pressurizing the gaseous first coolant, wherein the air-cooled condenser is connected in turn to be in circulation;
the circulation route of the second secondary refrigerant at least comprises a fourth route, and the fourth route comprises a heat exchanger and a secondary cooling fan which are sequentially connected into a circulation mode.
2. The system of claim 1 wherein the first coolant circulation circuit further comprises a second circuit comprising an air-cooled condenser interconnected in a cycle, a second throttle for reducing the temperature of the first coolant, a cold storage tank for transferring heat to the second coolant and storing cold energy in the second coolant, and a compressor.
3. The system of claim 1 or 2, wherein the circulation path of the first coolant carrier further comprises a third path comprising an air-cooled condenser interconnected in circulation, a third throttle valve for reducing the temperature of the first coolant, a direct-cooled air cooler for discharging cold energy into the refrigerated compartment, and a compressor.
4. The system of claim 3, wherein the first line, second line, and third line are switched with respect to each other.
5. The system of claim 1 wherein the second coolant loop further comprises a fifth circuit comprising a cold storage tank and a cold carrier cold air blower interconnected in a loop.
6. The system of claim 5, wherein the fourth line and the fifth line are switched with each other.
7. The system of claim 1 or 5 wherein the second coolant loop further comprises a sixth loop comprising a heat exchanger and a cold storage tank interconnected in a loop or in one-way communication.
8. The system of claim 1 or 5 wherein the second coolant loop further comprises a seventh circuit comprising a heat exchanger, a cold storage tank, and a cold carrier cold blower in one-way communication.
9. The system of claim 1, wherein the system is a system for testing the performance of the coolant carrier, and the system is further provided with a plurality of test points, and the material and the physical and chemical properties of the heat exchange tubes in the test points are different from each other.
10. The system of claim 9, wherein the cold storage tank comprises:
a tank body;
a first coolant inlet manifold for introducing a first coolant from the exterior into the cold storage tank;
the first secondary refrigerant output header pipe is used for outputting the secondary refrigerant after heat exchange to the outside; and the number of the first and second groups,
and the inlets of the first secondary refrigerant branch pipes are connected with the first secondary refrigerant input header pipe, and the outlets of the first secondary refrigerant branch pipes are connected with the first secondary refrigerant output header pipe, so that the contact area of the first secondary refrigerant for heat exchange in the cold storage tank is increased.
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| CN202122053880.7U CN215983354U (en) | 2021-08-27 | 2021-08-27 | Secondary refrigerant circulating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122053880.7U CN215983354U (en) | 2021-08-27 | 2021-08-27 | Secondary refrigerant circulating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114486265A (en) * | 2022-04-01 | 2022-05-13 | 中国飞机强度研究所 | Cold carrying system for aircraft extreme temperature test and parameter design method thereof |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114486265A (en) * | 2022-04-01 | 2022-05-13 | 中国飞机强度研究所 | Cold carrying system for aircraft extreme temperature test and parameter design method thereof |
| CN114486265B (en) * | 2022-04-01 | 2022-06-24 | 中国飞机强度研究所 | Cold carrying system for aircraft extreme temperature test and parameter design method thereof |
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