Cooling system of vehicle-mounted helium compressor

Abstract

The invention discloses a cooling system of a vehicle-mounted helium compressor. Comprising a regenerator, a helium compressor cooling water circulating water pump, a loose joint conveying pipeline, a mixing conveying pump, a first stop valve, an ice-water mixer, a second stop valve, a third stop valve, a cooling-water machine water tank, a cooling-water machine compressor, a cooling-water machine condenser, a cooling-water machine fan, a cooling-water machine expansion valve, an ice-making machine compressor, an ice storage house, an ice-making machine expansion valve, an ice-making machine condenser and a cooling-water machine fan. An outlet of the helium compressor is connected with a water circulation water inlet of the regenerator, an inlet of the helium compressor is connected with an outlet of the cooling water circulation water pump of the helium compressor, an inlet of the cooling water circulation water pump of the helium compressor is connected with a water circulation water outlet of the regenerator, one end of the fifth stop valve is connected with a filling port of the regenerator, and the other end of the fifth stop valve is connected with a water circulation water outlet of the regenerator. And the other end is connected with a loose joint conveying pipeline, a mixing conveying pump, a first stop valve, an ice-water mixer, a second stop valve, a third stop valve, a ground water chilling unit and a ground ice making unit.

Description

Technical Field

[0001] The invention relates to the field of cooling technology, and in particular to a cooling system for a vehicle-mounted helium compressor. Background Art

[0002] Low-temperature superconducting maglev trains use the strong magnetic field generated by low-temperature superconducting magnets to support and drive the train. In order to maintain the superconducting properties of the magnets, an on-board helium compressor is required. During the normal refrigeration process of the helium compressor, the hot helium circulates to the compressor to increase the pressure, and the mechanical movement of the compressor also generates heat. If this heat is not removed in time, it will cause the compressor to overheat, making it unable to refrigerate the liquid helium normally, and even causing the magnets to lose their superconducting properties. Therefore, it is necessary to reasonably design the cooling system of the helium compressor to keep the helium compressor in a suitable operating temperature range.

[0003] At present, helium compressors on the market generally rely on chillers to provide cooling water for cooling helium compressors. The compressor of the chiller compresses the gaseous refrigerant into a high-temperature and high-pressure liquid, which is then transported to the outdoor condenser and cooled by air to become a high-temperature and high-pressure liquid refrigerant. The liquid refrigerant flows through the expansion valve to throttle and reduce the pressure, and then enters the heat exchanger to absorb the heat of the helium compression water cycle. The refrigerant vaporizes and finally returns to the compressor to increase the pressure and continue the cycle refrigeration.

[0004] Traditional chillers cannot do without air. During the chiller cooling process, when the refrigerant passes through the condenser, it needs to complete heat exchange with the surrounding air to fully condense the refrigerant and turn it into liquid. This ensures that when the refrigerant reaches the expansion valve, it can throttle and cool down to generate cooling capacity.

[0005] If a traditional chiller is used to provide cooling water for the helium compressor on the maglev train, in order to ensure the air intake and the heat dissipation effect of the condenser, a special air intake and exhaust channel needs to be set up on the train. However, such an air intake and exhaust channel will increase the running resistance of the train and is not suitable for a vacuum environment without air medium. Summary of the invention

[0006] The invention provides a cooling system for a vehicle-mounted helium compressor, which can solve the technical problems in the prior art.

[0007] The present invention provides a cooling system for a vehicle-mounted helium compressor, wherein the system comprises a cold storage device, a helium compressor cooling water circulation pump, a flexible delivery pipeline, a mixed delivery pump, a first stop valve, an ice-water mixer, a second stop valve, a third stop valve, a chiller water tank, a chiller compressor, a chiller condenser and a fan, a chiller expansion valve, an ice maker compressor, an ice storage bin, an ice maker expansion valve, an ice maker condenser and a fan, a fourth stop valve and a fifth stop valve, wherein:

[0008] The outlet of the helium compressor is connected to the water circulation inlet of the cold storage device, the inlet of the helium compressor is connected to the outlet of the cooling water circulation pump of the helium compressor, the inlet of the cooling water circulation pump of the helium compressor is connected to the water circulation outlet of the cold storage device, one end of the fifth stop valve is connected to the filling port of the cold storage device, and the other end is connected to the movable delivery pipeline, the mixed delivery pump, the first stop valve and the ice-water mixer in sequence, the ice-water mixer is also connected to the second stop valve and the third stop valve, the second stop valve is connected to the chiller water tank, the chiller water tank is also connected to the chiller compressor and the chiller expansion valve, the chiller condenser and the fan are arranged between the chiller compressor and the chiller expansion valve, the third stop valve is connected to the ice storage, the ice storage is also connected to the ice maker compressor and the ice maker expansion valve, the ice maker condenser and the fan are arranged between the ice maker compressor and the ice maker expansion valve, and the fourth stop valve is connected to the return water port of the cold storage device.

[0009] Preferably, the system further comprises a filtering unit disposed between the helium compressor and the cold storage device.

[0010] Preferably, the filtering unit is a filter net.

[0011] Preferably, the system further comprises a temperature detection unit, which is arranged at the outlet of the helium compressor and is used to detect the temperature of the outlet of the helium compressor.

[0012] Preferably, the temperature detection unit is a thermometer.

[0013] Preferably, the system further comprises a flow detection unit, which is arranged between the second stop valve and the chiller water tank and is used to detect the cooling water flow.

[0014] Preferably, the flow detection unit is a flow meter.

[0015] Preferably, a stirrer is provided in the ice-water mixer for stirring and mixing the ice and cooling water entering the ice-water mixer.

[0016] Through the above technical solution, a certain proportion of ice-water mixture can be loaded into the on-board cold storage device to provide cooling capacity for the helium compressor, maintaining the helium compressor in a normal operating temperature range, and solving the problem that the existing solution cannot provide cooling water for the helium compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A cooling system for a vehicle-mounted helium compressor is shown. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0022] Figure 1A cooling system for a vehicle-mounted helium compressor is shown.

[0023] like Figure 1 As shown, an embodiment of the present invention provides a cooling system for a vehicle-mounted helium compressor, wherein the system includes a cold storage device 2, a helium compressor cooling water circulation pump 3, a flexible delivery pipeline 4, a mixed delivery pump 5, a first stop valve 6, an ice-water mixer 7, a second stop valve 8, a third stop valve 9, a chiller water tank 10, a chiller compressor 11, a chiller condenser and a fan 12, a chiller expansion valve 13, an ice maker compressor 14, an ice storage 15, an ice maker expansion valve 16, an ice maker condenser and a fan 17, a fourth stop valve 18 and a fifth stop valve 19, wherein,

[0024] The outlet of the helium compressor 1 is connected to the water circulation inlet c of the cold accumulator 2, the inlet of the helium compressor 1 is connected to the outlet of the helium compressor cooling water circulation pump 3, the inlet of the helium compressor cooling water circulation pump 3 is connected to the water circulation outlet d of the cold accumulator 2, one end of the fifth stop valve 19 is connected to the filling port b of the cold accumulator 2, and the other end is connected to the movable delivery pipeline 4, the mixed delivery pump 5, the first stop valve 6 and the ice-water mixer 7 in sequence, the ice-water mixer 7 is also connected to the second stop valve 8 and the third stop valve 9, the second stop valve 8 is connected to the The chiller water tank 10 is connected, the chiller water tank 10 is also connected to the chiller compressor 11 and the chiller expansion valve 13, the chiller condenser and the fan 12 are arranged between the chiller compressor 11 and the chiller expansion valve 13, the third stop valve 9 is connected to the ice storage 15, the ice storage 15 is also connected to the ice maker compressor 14 and the ice maker expansion valve 16, the ice maker condenser and the fan 17 are arranged between the ice maker compressor 14 and the ice maker expansion valve 16, and the fourth stop valve 18 is connected to the return water port a of the cold storage device 2.

[0025] Among them, the chiller water tank 10, the chiller compressor 11, the chiller condenser and fan 12, and the chiller expansion valve 13 constitute the ground chiller, and the ice maker compressor 14, the ice storage 15, the ice maker expansion valve 16, and the ice maker condenser and fan 17 constitute the ground ice maker. The cooling water prepared by the chiller can reach the required temperature and quality and is stored in the water tank of the chiller; the chiller water tank has a weighing function and an automatic start-stop control function, which can deliver a fixed mass of water at a time, and can automatically start and stop delivery according to water demand. Similarly, the ice maker can make ice that meets the quality requirements and store it in the ice storage. The ice storage can have an automatic weighing function and an automatic start-stop control function, which can deliver a fixed mass of ice at a time, and can automatically start and stop delivery according to water demand.

[0026] Through the above technical solution, a certain proportion of ice-water mixture can be loaded into the on-board cold storage device to provide cooling capacity for the helium compressor, maintaining the helium compressor in a normal operating temperature range, and solving the problem that the existing solution cannot provide cooling water for the helium compressor.

[0027] The cooling system of the on-board helium compressor described in the present invention can be used, for example, to cool the on-board helium compressor of a low-temperature superconducting maglev train, but the present invention is not limited to this. Other medium and large heat dissipation power heat dissipation equipment, other fixed heat dissipation equipment or heat dissipation equipment that can be moved at any time can also adopt the above-mentioned cooling system of the present invention.

[0028] The cooling system of the vehicle-mounted helium compressor described in the present invention can also be used to cool equipment in a vacuum or low vacuum environment, but the present invention is not limited thereto. The cooling system is also suitable for cooling equipment under normal pressure and high pressure environments.

[0029] The cooling system of the vehicle-mounted helium compressor of the present invention can also be used to cool equipment in a normal temperature environment, but the present invention is not limited thereto. The cooling system is also suitable for cooling equipment in a high temperature environment.

[0030] Among them, the ice-water mixture has a certain fluidity, and the cold water can directly enter the cooling water cycle of the helium compressor; the latent heat of ice is relatively large, which can minimize the volume of the cold storage device, and the ice releases cold energy after melting into water, which can directly participate in the cooling water cycle of the helium compressor, further improving the heat exchange efficiency.

[0031] According to an embodiment of the present invention, the system further comprises a filtering unit, which is arranged between the helium compressor 1 and the cold storage device 2 .

[0032] By setting up a filtering unit, it can be ensured that ice will not block the helium compressor circulation pipeline, avoiding the risk of ice blockage.

[0033] According to an embodiment of the present invention, the filter unit is a filter net.

[0034] According to an embodiment of the present invention, the system further comprises a temperature detection unit 20 , which is disposed at the outlet of the helium compressor 1 and is used to detect the temperature of the outlet of the helium compressor 1 .

[0035] By setting up a temperature detection unit, the water outlet temperature can be monitored: when the water temperature reaches the maximum water temperature threshold of the helium compressor, the train can be controlled to stop at the station in advance, the hot water in the cold storage tank can be pumped out, and the ice-water mixture can be refilled to ensure cooling efficiency.

[0036] According to an embodiment of the present invention, the temperature detection unit is a thermometer.

[0037] According to an embodiment of the present invention, the system further comprises a flow detection unit 21, which is arranged between the second stop valve 8 and the chiller water tank 10 and is used to detect the cooling water flow.

[0038] By setting up a flow detection unit, the cooling water flow can be monitored to ensure that the ice-water ratio can be delivered to the ice-water mixer according to a preset value.

[0039] According to an embodiment of the present invention, the flow detection unit 21 is a flow meter.

[0040] According to an embodiment of the present invention, a stirrer is provided in the ice-water mixer 7 for stirring and mixing the ice and cooling water entering the ice-water mixer 7 .

[0041] For example, water is transported to the mixer through a pipeline (water pipe), and ice is transported to the mixer through a screw conveyor. The transported ice and water are fully mixed in the mixer for use; the agitator in the mixer stirs continuously to fully mix the ice and water, while preventing large areas of ice water from freezing. During the transportation process, the quality of the transported cooling water and ice can be monitored to ensure that the ice-water ratio can be transported to the mixer according to the pre-set value.

[0042] In the present invention, the amount of cold that needs to be stored can be calculated based on the time that the superconducting train needs to run in a low vacuum environment, the heat load and working time of the helium compressor on the superconducting magnet, and the maximum temperature limit of the water outlet of the helium compressor, including the ice-water ratio, the temperature and quality of the cold water, the quality of the ice, etc. For example, for the ice-water ratio, it only needs to meet the requirements of the cold storage capacity while taking into account the fluidity of the ice-water mixture, and the present invention is not limited to this.

[0043] The working principle of the cooling system of the onboard helium compressor of the present invention is described below by taking the helium compressor of a low-temperature superconducting maglev train running in a low vacuum environment as an example.

[0044] In the present invention, the water circulation inlet c and the water circulation outlet d of the cold storage device 2 are used as the water pipe interface of the cooling water circulation to circulate the cooling water; the filling port b of the cold storage device 2 is used to add the ice-water mixture (for example, before the train enters the low vacuum environment, the mixed ice-water mixture enters the vehicle-mounted cold storage device 2 through the filling port b), and the return water port a of the cold storage device 2 is used to extract the hot water after the cold storage device 2 releases the cold, so as to make room for the ice-water mixture. In addition, in order to prevent the cold from escaping, the cold storage device 2 has good thermal insulation performance.

[0045] The helium compressor cooling water circulation pump 3 on the circulation loop of the helium compressor 1 can provide cooling water for the helium compressor 1; the hot water after passing through the helium compressor 1 circulates to the cold storage device 2, and the ice in the cold storage device 2 continuously releases cold energy and is converted into cold water to maintain the operating temperature range of the helium compressor 1.

[0046] Specifically, the cooling process of the cooling system of the low-temperature superconducting magnetic levitation vehicle-mounted helium compressor in a low vacuum environment is as follows:

[0047] Step 1: Turn on the chiller to prepare cooling water, and store the cooling water in the chiller water tank 10 for standby use (the chiller compressor 11, the chiller condenser and fan 12, and the chiller expansion valve 13 cooperate with each other to prepare cooling water, and store it in the chiller water tank 10); turn on the ice making unit to prepare ice, and store the ice in the ice storage 15 for standby use (the ice making unit compressor 14, the ice making unit expansion valve 16, and the ice making unit condenser and fan 17 cooperate with each other to make ice, and store it in the ice storage 15).

[0048] Step 2: In the automatic control program, various parameters such as the mass of cooling water to be delivered at one time, the mass of ice to be delivered at one time, the number of times ice and water are delivered respectively, and the ratio of the ice-water mixture are pre-set.

[0049] Step 3: Open the second stop valve 8 and the third stop valve 9 at the same time to deliver the cooling water and ice prepared in step 1 to the ice-water mixer 7; the number of ice and water delivery is automatically completed according to the preset ice-water ratio. At the same time, start the agitator in the ice-water mixer 7 to rotate continuously.

[0050] Step 4: Before the train enters the low vacuum environment, it stops on the platform, and the two ends of the flexible delivery pipe 4 are respectively connected to the mixing delivery pump 5 and the filling port b of the cold storage device 2; open the first stop valve 6, close the fourth stop valve 18, and prepare to add ice-water mixture to the filling port b.

[0051] Step 5: Open the fifth stop valve 19 , start the mixing delivery pump 5 , and add the ice-water mixture into the cold storage device 2 .

[0052] Step 6: After the filling is completed, stop the mixing delivery pump 5, close the fifth stop valve 19, and disconnect the flexible delivery pipe 4.

[0053] Step 7: Start the cooling water circulation system (circulating water pump 3) of the onboard helium compressor 1. At this time, the train can operate in a low vacuum environment. The heat generated by the onboard helium compressor 1 continuously consumes the cold in the cold storage device.

[0054] Step 8: When the train runs in the low vacuum environment for a period of time or the outlet water temperature of the helium compressor 1 reaches the maximum temperature threshold, the train stops at the station in advance.

[0055] Step 9: Open the fourth stop valve 18 to pump out the hot water in the cold storage device 2.

[0056] Step 10: After the hot water is returned, close the fourth stop valve 18 and return to step 3 to refill the ice water mixture.

[0057] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0058] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0059] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cooling system for a vehicle-mounted helium compressor, characterized in that: The system comprises a cold storage device (2), a helium compressor cooling water circulation pump (3), a flexible delivery pipeline (4), a mixing delivery pump (5), a first stop valve (6), an ice-water mixer (7), a second stop valve (8), a third stop valve (9), a chiller water tank (10), a chiller compressor (11), a chiller condenser and a fan (12), a chiller expansion valve (13), an ice maker compressor (14), an ice storage bin (15), an ice maker expansion valve (16), an ice maker condenser and a fan (17), a fourth stop valve (18) and a fifth stop valve (19), wherein: The outlet of the helium compressor (1) is connected to the water circulation inlet of the cold storage device (2), the inlet of the helium compressor (1) is connected to the outlet of the helium compressor cooling water circulation pump (3), the inlet of the helium compressor cooling water circulation pump (3) is connected to the water circulation outlet of the cold storage device (2), one end of the fifth stop valve (19) is connected to the filling port of the cold storage device (2), and the other end is connected to the movable delivery pipeline (4), the mixing delivery pump (5), the first stop valve (6) and the ice-water mixer (7) in sequence, the ice-water mixer (7) is also connected to the second stop valve (8) and the third stop valve (9), the second stop valve (8) is connected to the cold storage device (2), and the third stop valve (9) is connected to the cold storage device (2). The water chiller is connected to a water tank (10) of the water chiller, the water chiller water tank (10) is also connected to the water chiller compressor (11) and the water chiller expansion valve (13), the water chiller condenser and the fan (12) are arranged between the water chiller compressor (11) and the water chiller expansion valve (13), the third stop valve (9) is connected to the ice storage (15), the ice storage (15) is also connected to the ice maker compressor (14) and the ice maker expansion valve (16), the ice maker condenser and the fan (17) are arranged between the ice maker compressor (14) and the ice maker expansion valve (16), and the fourth stop valve (18) is connected to the water return port of the cold storage device (2).

2. The system according to claim 1, characterized in that The system also includes a filtering unit, which is arranged between the helium compressor (1) and the cold storage device (2).

3. The system according to claim 2, characterized in that The filtering unit is a filtering net.

4. The system according to claim 1, characterized in that The system further comprises a temperature detection unit (20) which is arranged at the outlet of the helium compressor (1) and is used to detect the temperature of the outlet of the helium compressor (1).

5. The system according to claim 4, characterized in that The temperature detection unit is a thermometer.

6. The system according to claim 5, characterized in that The system further comprises a flow detection unit (21), which is arranged between the second stop valve (8) and the chiller water tank (10) and is used to detect the cooling water flow.

7. The system according to claim 6, characterized in that The flow detection unit (21) is a flow meter.

8. The system according to any one of claims 1 to 7, characterized in that: The ice-water mixer (7) is provided with a stirrer for stirring and mixing the ice and cooling water entering the ice-water mixer (7).

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