A refrigeration system suitable for high-temperature superconducting magnet refrigeration equipment

Abstract

The embodiment of the present application discloses a refrigeration system suitable for high-temperature superconducting magnet refrigeration equipment, including N chillers, a first multi-channel and a second multi-channel. The first multi-channel has N+1 first ports, and the N first ports are respectively connected to the water outlets of the N chillers; the second multi-channel has n+1 second ports, and the n second ports are respectively connected to the water inlets of the n compressors. The remaining second port of the second multi-channel is connected to the remaining first port of the first multi-channel, and the water inlets of the N chillers are connected to the water outlets of the n compressors. The present application increases the number of chillers, and the water outlets of the N chillers are arranged in parallel through the first multi-channel. When some chillers fail, the remaining chillers can still cool all the compressors, so that even if some chillers fail, the cooling capacity of the refrigeration system suitable for high-temperature superconducting magnet refrigeration equipment on the compressors can be guaranteed, so as to prevent the high-temperature superconducting magnet from quenching and ensure the normal operation of the high-temperature superconducting electric maglev vehicle.

Description

Technical Field

[0001] The present application relates to the technical field of superconducting magnetic levitation, and in particular to a refrigeration system suitable for high-temperature superconducting magnet refrigeration equipment. Background Art

[0002] Chiller is an important equipment in the refrigeration system.

[0003] In the prior art, one chiller is used to cool one or even two or more compressors. Once the chiller fails, it cannot cool the compressor. The compressor shuts down due to high temperature, and the refrigeration system cannot cool the high-temperature superconducting magnet.

[0004] When the temperature of the high-temperature superconducting magnet rises to a certain value, the high-temperature superconducting magnet will lose its superconductivity, causing the high-temperature superconducting electric maglev vehicle to be unable to operate normally, causing a great impact.

[0005] Therefore, how to ensure the cooling capacity of the refrigeration system for the compressor even if a chiller fails has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0006] The present application proposes a refrigeration system suitable for high-temperature superconducting magnet refrigeration equipment, so as to ensure the cooling capacity of the refrigeration system for the compressor even if some chillers fail.

[0007] To achieve the above objectives, the present application provides a refrigeration system suitable for high-temperature superconducting magnet refrigeration equipment, comprising:

[0008] N chillers are used to cool n compressors;

[0009] a first multi-channel having N+1 first ports, wherein the N first ports of the first multi-channel are respectively connected to the water outlets of the N chillers;

[0010] A second multi-channel having n+1 second ports, wherein n second ports of the second multi-channel are respectively connected to the water inlets of n compressors, the remaining second port of the second multi-channel is connected to the remaining first port of the first multi-channel, and the water inlets of the N chillers are connected to the water outlets of the n compressors, wherein N≥2 and N is a positive integer, and n is a positive integer.

[0011] Preferably, the refrigeration system for high-temperature superconducting magnet refrigeration equipment further comprises:

[0012] a third multi-channel having n+1 third ports, wherein n third ports of the third multi-channel are respectively connected to the water outlets of n compressors;

[0013] A fourth multi-channel having N+1 fourth ports, wherein N fourth ports of the fourth multi-channel are respectively connected to the water inlets of the N chillers, and the remaining fourth port of the fourth multi-channel is connected to the remaining third port of the third multi-channel.

[0014] Preferably, in the above-mentioned refrigeration system applicable to high-temperature superconducting magnet refrigeration equipment, the water outlet of the compressor is connected to the water inlet of the chiller through a water pipe.

[0015] Preferably, in the above refrigeration system applicable to high-temperature superconducting magnet refrigeration equipment, a check valve is provided on the water outlet pipe connecting the water outlet of the chiller and the first port.

[0016] Preferably, in the above refrigeration system applicable to high-temperature superconducting magnet refrigeration equipment, a first shut-off valve and a flow control valve are provided on the water inlet pipeline connecting the second port of the second multi-channel device and the water inlet of the compressor.

[0017] Preferably, in the above-mentioned refrigeration system applicable to high-temperature superconducting magnet refrigeration equipment, the bottoms of the water tanks of the N chillers are connected to each other through a first connecting pipe.

[0018] Preferably, the refrigeration system for high-temperature superconducting magnet refrigeration equipment further includes a water storage tank, the water storage tank is connected to the first connecting pipe, and the first connecting pipe is provided with a second stop valve.

[0019] The water storage tank is connected to the water tank of the chiller through a second connecting pipe. A water pump is provided on the second connecting pipe. The water pump is used to pump water from the water tank of the chiller to the water storage tank.

[0020] Preferably, the refrigeration system for high-temperature superconducting magnet refrigeration equipment further comprises a liquid level sensor for detecting the liquid level of the water tank of the chiller, and the liquid level sensor is communicatively connected to the water pump.

[0021] Preferably, in the above refrigeration system applicable to high-temperature superconducting magnet refrigeration equipment, the remaining second port of the second multi-way is connected to the remaining first port of the first multi-way through a pipeline, and a third stop valve is provided on the pipeline.

[0022] Preferably, in the above-mentioned refrigeration system applicable to high-temperature superconducting magnet refrigeration equipment, the number of the chillers is equal to the number of the compressors.

[0023] The refrigeration system for high-temperature superconducting magnet refrigeration equipment provided in the embodiment of the present application includes N chillers, a first multi-pass and a second multi-pass. The first multi-pass has N+1 first ports, and the N first ports of the first multi-pass are respectively connected to the water outlets of the N chillers; the second multi-pass has n+1 second ports, and the n second ports of the second multi-pass are respectively connected to the water inlets of n compressors, and the remaining second port of the second multi-pass is connected to the remaining first port of the first multi-pass, and the water inlets of the N chillers are connected to the water outlets of the n compressors. The refrigeration system for high-temperature superconducting magnet refrigeration equipment disclosed in the present application increases the number of chillers. The water outlets of the N chillers are arranged in parallel through the first multi-pass. When one of the chillers fails, the remaining chillers can still cool all the compressors in the n compressors. Even if some chillers fail, the cooling capacity of the refrigeration system for the compressors can be guaranteed, thereby preventing the high-temperature superconducting magnet from quenching and ensuring the normal operation of the high-temperature superconducting electric maglev vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or prior art descriptions. Obviously, the drawings described below are only some examples or embodiments of the present application. For those of ordinary skill in the art, without paying any creative work, other drawings can be obtained based on the provided drawings, and the present application can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language context or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0025] Figure 1 This is a structural diagram of a refrigeration system suitable for high-temperature superconducting magnet refrigeration equipment of the present application.

[0026] in:

[0027] 1- Chiller; 2- Compressor; 3- First multi-way valve; 4- Second multi-way valve; 5- Water pipe; 6- Check valve; 7- First stop valve; 8- Flow control valve; 9- First connecting pipe; 10- Water storage tank; 11- Second stop valve; 12- Second connecting pipe; 13- Water pump; 14- Third stop valve. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are merely for explaining the related application and are not intended to limit the application. The described embodiments are merely a portion of the embodiments of the present application and are not intended to be exhaustive. All other embodiments derived by persons of ordinary skill in the art based on the embodiments in the present application without creative effort are intended to fall within the scope of protection of the present application.

[0029] It should be noted that, for ease of description, only the parts related to the relevant applications are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0030] It should be understood that the terms "system," "device," "unit," and / or "module" used in this application are a method for distinguishing different components, elements, parts, portions, or assemblies at different levels. However, if other terms can achieve the same purpose, the terms may be replaced by other expressions.

[0031] As used in this application and the claims, unless the context clearly indicates an exception, the terms "a," "an," "an," and / or "the" are not intended to refer to the singular and may include the plural, unless the context clearly indicates otherwise. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements. The phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, product, or apparatus that includes the elements.

[0032] In the description of the embodiments of this application, unless otherwise specified, " / " represents or. For example, A / B can represent A or B. "And / or" in this article is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of this application, "plurality" means two or more than two.

[0033] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0034] See also Figure 1 .

[0035] Some embodiments of the present application disclose a refrigeration system suitable for high-temperature superconducting magnet refrigeration equipment, including N chillers 1, a first multi-pass chiller 3 and a second multi-pass chiller 4.

[0036] The first multi-channel 3 has N+1 first ports, and the N first ports of the first multi-channel 3 are respectively connected to the water outlets of N chillers 1;

[0037] The second multi-channel 4 has n+1 second ports, the n second ports of the second multi-channel 4 are respectively connected to the water inlets of the n compressors 2, the remaining second port of the second multi-channel 4 is connected to the remaining first port of the first multi-channel 3, and the water inlets of the N chillers 1 are connected to the water outlets of the n compressors 2, where N≥2, N is a positive integer, and n is a positive integer.

[0038] The water from the outlets of N chillers 1 is discharged through the N first ports of the first multi-channel 3 respectively, enters a second port of the second multi-channel 4 connected to the first port from the remaining first port of the first multi-channel 3, and then enters the water inlets of n compressors 2 from the remaining n second ports of the second multi-channel 4 respectively.

[0039] The refrigeration system disclosed in the present application, which is suitable for high-temperature superconducting magnet refrigeration equipment, increases the number of chillers 1. The water outlets of N chillers 1 are arranged in parallel through a first multi-pass 3. When one of the chillers 1 fails, the remaining chillers 1 can still cool all the compressors 2 among the n compressors 2. Even if some chillers fail, the cooling capacity of the refrigeration system for the compressors 2 can be guaranteed, so as to prevent the high-temperature superconducting magnet from quenching and ensure the normal operation of the high-temperature superconducting electric maglev vehicle.

[0040] The refrigeration system disclosed in the present application and applicable to high-temperature superconducting magnet refrigeration equipment has at least two chillers 1. The number of chillers 1 can be equal to the number of compressors 2, or can be greater than or less than the number of compressors 2.

[0041] In an embodiment where the number of chillers 1 is greater than the number of compressors 2 , the heat of one compressor 2 is absorbed and processed by more than one chiller 1 , thereby accelerating the cooling speed of the compressor 2 to a certain extent.

[0042] Preferably, the number of compressors 2 is equal to the number of chillers 1. Compared with the embodiment in which the number of compressors 2 is greater than the number of chillers 1, the load of the chiller 1 can be reduced, and the risk of failure of the chiller 1 is reduced to a certain extent, while also reducing the cost of the refrigeration system suitable for high-temperature superconducting magnet refrigeration equipment.

[0043] There are at least two chillers 1 so that when one of the chillers 1 is damaged, the remaining chillers 1 can continue to work, and the damaged chiller 1 can be easily repaired or replaced.

[0044] The water inlets of N chillers 1 are connected to the water outlets of n compressors 2, ensuring that the cooling water after absorbing heat from each compressor 2 can return to the chiller 1. After the water inlets of N chillers 1 are connected to the water outlets of n compressors 2, it is necessary to ensure that each chiller 1 has return water, and each compressor 2 is connected to the return water outlet of at least one chiller 1.

[0045] In some embodiments of the present application, the connection structure between the water inlets of N chillers 1 and the water outlets of n compressors 2 may be the same as the connection structure between the water outlets of N chillers 1 and the water inlets of n compressors 2 .

[0046] Specifically, it includes the third multi-channel and the fourth multi-channel.

[0047] The third multi-channel has n+1 third ports, wherein n third ports are respectively connected to the water outlets of n compressors 2;

[0048] The fourth multi-channel has N+1 fourth ports, wherein the N fourth ports are respectively connected to the water inlets of the N chillers 1 , and the remaining fourth port of the fourth multi-channel is connected to the remaining third port of the third multi-channel.

[0049] The water from the water outlets of the n compressors 2 is discharged through the n third ports of the third multi-channel respectively, enters a fourth port of the fourth multi-channel connected to the third port from the remaining third port of the third multi-channel, and then enters the water inlets of the N chillers 1 from the remaining N fourth ports of the fourth multi-channel respectively.

[0050] In this embodiment, N chillers 1 share the heat generated by n compressors 2 , which not only improves the cooling efficiency of the compressors 2 but also reduces the load of a single chiller 1 .

[0051] In other embodiments of the present application, the water outlet of the compressor 2 is connected to the water inlet of the chiller 1 through the water pipe 5.

[0052] In an embodiment where the number of compressors 2 is equal to the number of chillers 1, it is preferred to connect the water outlet of the compressor 2 to the water inlet of the chiller 1 via the water pipe 5. This connection method is simple in structure and low in cost.

[0053] In an embodiment where the number of compressors 2 is greater than the number of chillers 1, the water outlets of two compressors 2 are connected to the water inlet of one chiller 1 through water pipes 5 respectively. Specifically, the two water pipes 5 are connected to the water inlet of the chiller 1 through a tee.

[0054] The water outlet of the chiller 1 is connected to the first port of the first multi-port valve 3 through a water outlet pipe. A check valve 6 is provided on the water outlet pipe connected to the water outlet of the chiller 1 .

[0055] When one of the chillers 1 fails and stops, the water entering the first multi-channel 3 will not flow back into the failed chiller 1.

[0056] In order to further optimize the above technical solution, the present application provides a first stop valve 7 and a flow control valve 8 on the water inlet pipeline connecting the second port of the second multi-port valve 4 with the water inlet of the compressor 2.

[0057] The first stop valve 7 is used to control the on-off of the water inlet pipeline, thereby controlling the chiller 1 to supply water to the compressor 2 .

[0058] The flow control valve 8 is used to maintain a predetermined flow in the water inlet pipeline, with the upper limit of the flow being a predetermined value, to ensure that the water flow entering the compressor 2 is relatively balanced.

[0059] The water tank volume of the chiller 1 is fixed, but the return water volume of different compressors 2 is different. In order to prevent the uneven water flow of the compressor 2 for a long time, resulting in excessive water in the water tank of some chillers 1, water will overflow from the water tank of the chiller 1.

[0060] In order to solve the above problems, the bottoms of the water tanks of N chillers 1 of the refrigeration system for high-temperature superconducting magnet refrigeration equipment disclosed in this application are connected to each other through a first connecting pipe 9, so that the water tanks of the N chillers 1 form a communicating vessel, and the water levels of the water tanks of the N chillers 1 are balanced by gravity, and the water levels of the water tanks of each chiller 1 are the same.

[0061] To prevent the balancing flow rate of the first connecting pipe 9 from being less than the water flow rate returning from the compressor 2 to the water tank of the chiller 1, thereby preventing the water tank of the chiller 1 from overflowing, the refrigeration system for high-temperature superconducting magnet refrigeration equipment disclosed in this application further includes a water storage tank 10 for storing water in the water tank of the chiller 1. The water storage tank and the water tank of the chiller 1 are both communicating vessels.

[0062] Specifically, the water storage tank 10 is connected to the water tank of the chiller 1 through a first connecting pipe 9, and a second stop valve 11 is provided on the first connecting pipe 9;

[0063] At the same time, the water storage tank 10 is connected to the water tank of the chiller 1 through a second connecting pipe 12. A water pump 13 is provided on the second connecting pipe 12. The water pump 13 is used to pump water from the water tank of the chiller 1 to the water storage tank 10. Specifically, the water pump 13 operates when the balance flow rate of the first connecting pipe 9 is less than the water flow rate returning from the compressor 2 to the water tank of the chiller 1.

[0064] The second stop valve 11 is opened, the water pump 13 is closed, and the water in the water tank of the chiller 1 automatically flows into the water storage tank 10;

[0065] When the balance flow of the first connecting pipe 9 is less than the water flow from the compressor 2 back to the water tank of the chiller 1, the second stop valve 11 is closed, the water pump 13 is turned on, and the water in the water tank of the chiller 1 is pumped to the water storage tank 10 through the water pump 13 until the liquid level of the water tank of the chiller 1 reaches a preset height.

[0066] The water storage tank 10 is provided with a drain outlet.

[0067] A second stop valve 11 is provided between each chiller 1 and the water storage tank 10 , so as to facilitate the shutdown and maintenance of a damaged chiller 1 without affecting the operation of other chillers 1 .

[0068] In the present application, a liquid level sensor is installed in the water tank of each chiller 1 . The liquid level sensor is used to detect the liquid level height of the water tank of the chiller 1 . The liquid level sensor is communicatively connected to the water pump 13 .

[0069] When the liquid level of the water tank of the chiller 1 is higher than the preset height, the liquid level sensor alarms and the water pump 13 works to quickly pump the water of the chiller 1 to the water storage tank 10. When the liquid level of the water tank of the chiller 1 is less than or equal to the preset height, the liquid level sensor stops alarming and the water pump 13 stops pumping water.

[0070] The liquid level sensor may be a liquid level gauge.

[0071] The remaining second port of the second multi-way valve 4 is connected to the remaining first port of the first multi-way valve 3 through a pipeline. A third stop valve 14 is provided on the pipeline to control the flow between the chiller 1 and the compressor 2.

[0072] The remaining fourth port of the fourth multi-way valve is connected to the remaining third port of the third multi-way valve through a pipeline. A fourth stop valve is provided on the pipeline to control the flow of fluid between the chiller 1 and the compressor 2.

[0073] The refrigeration system disclosed in the present application, which is suitable for high-temperature superconducting magnet refrigeration equipment, has a simple structure, is easy to install, saves time and effort, and can solve the problem that when an individual chiller 1 fails, the remaining chillers 1 can still ensure the normal operation of all compressors 2; in addition, when a chiller 1 fails and is shut down for maintenance, disconnecting the pipeline connected to the failed chiller 1 will not affect the operation of other chillers 1 and compressors 2.

[0074] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used, and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. The scope of application involved in this application is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned application concept. For example, the above-mentioned features are replaced with (but not limited to) technical features with similar functions disclosed in this application to form a technical solution.

Claims

1. A refrigeration system suitable for high-temperature superconducting magnet refrigeration equipment, characterized in that: include: N chillers (1) for cooling n compressors (2); A first multi-channel (3) having N+1 first ports, wherein the N first ports of the first multi-channel (3) are respectively connected to the water outlets of the N chillers (1), A second multi-channel (4) having n+1 second ports, wherein n second ports of the second multi-channel (4) are respectively connected to the water inlets of n compressors (2), the remaining second port of the second multi-channel (4) is connected to the remaining first port of the first multi-channel (3), and the water inlets of the N chillers (1) are connected to the water outlets of the n compressors (2), wherein N≥2 and N is a positive integer, and n is a positive integer; The bottoms of the water tanks of the N chillers (1) are connected to each other via a first connecting pipe (9); It also includes a water storage tank (10), the water storage tank (10) is connected to the first connecting pipe (9), the first connecting pipe (9) is provided with a second stop valve (11), and the water storage tank (10) is provided with a drain port. The water storage tank (10) is connected to the water tank of the chiller (1) via a second connecting pipe (12); a water pump (13) is provided on the second connecting pipe (12); the water pump (13) is used to pump water from the water tank of the chiller (1) into the water storage tank (10).

2. The refrigeration system for high-temperature superconducting magnet refrigeration equipment according to claim 1, characterized in that: Also includes: A third multi-channel having n+1 third ports, wherein n third ports of the third multi-channel are respectively connected to the water outlets of n compressors (2); A fourth multi-channel having N+1 fourth ports, wherein N fourth ports of the fourth multi-channel are respectively connected to the water inlets of N chillers (1), and the remaining fourth port of the fourth multi-channel is connected to the remaining third port of the third multi-channel.

3. The refrigeration system for high-temperature superconducting magnet refrigeration equipment according to claim 1, characterized in that: The water outlet of the compressor (2) is connected to the water inlet of the chiller (1) through a water pipe (5).

4. The refrigeration system for high-temperature superconducting magnet refrigeration equipment according to any one of claims 2 or 3, characterized in that: A check valve (6) is provided on the water outlet pipe connecting the water outlet of the chiller (1) and the first port.

5. The refrigeration system for high-temperature superconducting magnet refrigeration equipment according to claim 1, characterized in that: A first stop valve (7) and a flow control valve (8) are provided on a water inlet pipeline that connects the second port of the second multi-port valve (4) with the water inlet of the compressor (2).

6. The refrigeration system for high-temperature superconducting magnet refrigeration equipment according to claim 1, characterized in that: It also includes a liquid level sensor for detecting the liquid level of the water tank of the chiller (1), and the liquid level sensor is communicatively connected to the water pump (13).

7. The refrigeration system for high-temperature superconducting magnet refrigeration equipment according to claim 1, characterized in that: The remaining second port of the second multi-port (4) is connected to the remaining first port of the first multi-port (3) through a pipeline, and a third stop valve (14) is provided on the pipeline.

8. The refrigeration system for high-temperature superconducting magnet refrigeration equipment according to claim 1, characterized in that: The number of the water chillers (1) is equal to the number of the compressors (2).

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