[0028] The present invention will be further described in detail below in conjunction with specific embodiments and drawings. It is only intended to elaborate on the specific embodiments of the present invention, and does not impose any restriction on the present invention. The protection scope of the present invention is subject to the claims.
[0029] Reference figure 2 , The present invention proposes a refrigeration tower of superconducting iron remover, including:
[0030] Refrigeration tower body and heating control device;
[0031] The refrigerating tower body at least includes a refrigerating machine 2, an outer cylinder 3 used in conjunction with the refrigerating machine 2, and a low-temperature liquid helium Dewar 5, and the heating control device is partially or completely installed on the refrigerating tower body;
[0032] The heating control device detects the pressure value in the cryogenic liquid helium Dewar 5, and if the detected pressure value is less than the preset minimum pressure value, the heating control device starts the heating function.
[0033] The refrigeration tower of superconducting iron remover in the prior art such as figure 1 Shown, including:
[0034] Refrigerator 2a, 300K outer cylinder 3a, primary bellows 1a, heat radiation screen 4a, secondary bellows 6a, helium overflow hole 13a, copper heat sink 7a, safety valve 12a, cryogenic liquid helium dewar 5a, changeover Heater fin 10a and liquid helium 11a. The primary cold head 21a of the refrigerator 2a is connected with the copper heat sink 7a to cool the heat radiation shield 4a; the secondary cold head 22a of the refrigerator 2a is connected with the heat exchanger fin 10a to increase the cooling area.
[0035] The refrigeration tower of the superconducting iron remover in the prior art works under negative pressure, that is, its internal pressure is lower than 1 standard atmospheric pressure. Therefore, when the external air slowly penetrates into the body of the superconducting iron remover, it will It freezes inside, and the ice includes nitrogen ice and water ice. These ices are mainly condensed in the channels connecting the inside and outside of the refrigeration tower. If these ices are not removed, they will block these connecting channels and affect the working efficiency of the refrigerator 2a.
[0036] And because of icing, when the refrigerator 2a needs to be replaced, the refrigeration tower needs to be shut down to reheat it to room temperature, and the ice inside can be replaced before it can be replaced. The reheating process is relatively slow. The interlayer vacuum becomes bad and needs to be re-evacuated. Therefore, the entire process of replacing the refrigerator 2a takes a long time, which delays working time and efficiency.
[0037] Therefore, in the embodiment of the present invention, the prior art is improved. The refrigeration tower is operated under slight positive pressure by adding a heating control device. The specific principle is: the pressure value in the cryogenic liquid helium Dewar 5 is detected by the heating control device , When the detected air pressure value is less than the preset minimum air pressure value such as 1.5 standard atmospheric pressure, the heating function of the heating control device is started at this time. At this time, because the internal air pressure is greater than the external air pressure, the external air cannot penetrate into the superconducting The inside of the iron separator body, so the inside of the superconducting iron separator body will not freeze, and it will not block the channels connecting the inside of the refrigeration tower with the outside. By adding a heating control device, the inside of the refrigeration tower will no longer freeze to improve Improve the efficiency of the refrigeration tower.
[0038] Moreover, when the refrigerator 2 is replaced, there is no need to reheat its interior, so the replacement time of the replacement refrigerator 2 is shortened, and the work efficiency is improved.
[0039] The embodiment of the present invention makes the refrigeration tower work under slight positive pressure, so that the inside of the refrigeration tower no longer freezes, thereby improving the working efficiency of the refrigeration tower and the speed of replacing the refrigerator 2.
[0040] In one of the embodiments, if the heating control device detects that the pressure value in the low-temperature liquid helium Dewar 5 is greater than the preset maximum pressure value, the heating control device turns off the heating function.
[0041] Two standard atmospheric pressures can be selected for the preset maximum pressure value.
[0042] When the heating control device detects that the pressure value in the low-temperature liquid helium Dewar 5 is greater than the preset maximum pressure value, it indicates that there is no need to continue heating, so turn off the heating function and continue the detection.
[0043] Reference image 3 In one of the embodiments, the heating control device includes a heating device 8, an air pressure detection device 9 and a control device 13. One end of the control device 13 is connected to the heating device 8, and the other end of the control device 13 is connected to the air pressure detection device 9;
[0044] The air pressure detecting device 9 transmits a signal of the detected air pressure value to the control device 13, and the control device 13 determines whether to turn on or off the heating device 8 according to the air pressure value.
[0045] The air pressure detection device 9 is used to detect the air pressure value in the cryogenic liquid helium Dewar 5, and is responsible for transmitting the signal of the detected air pressure value to the control device 13. The control device 13 is used to determine the air pressure value by comparing the air pressure value with the preset The lowest air pressure value is compared with the preset highest air pressure value to control the heating device 8 to turn on or off, so that the heating device 8 can be turned on and off in time to prevent freezing inside the refrigeration tower and not waste electric energy.
[0046] Reference Figure 4 In one of the embodiments, the heating control device further includes a signal amplifier 14, one end of the signal amplifier 14 is connected to the air pressure detection device 9, and the other end of the signal amplifier 14 is connected to the control device 13;
[0047] The signal amplifier 14 is used to amplify the signal of the air pressure value detected by the air pressure detecting device 9.
[0048] Since the signal is easily attenuated during transmission, a signal amplifier 14 is added to prevent the signal from attenuating, so that the control device 13 can detect the signal of the air pressure value.
[0049] Reference figure 2 In one of the embodiments, the heating device is installed on the surface of the secondary cold head 22 of the refrigerator 2.
[0050] The heating device 8 can be installed at any position where the refrigerator is easy to freeze. Since the surface of the secondary cold head 22 of the refrigerator 2 is easy to freeze, the heating device can be installed on the surface of the secondary cold head 22 of the refrigerator 2 for Prevent the secondary cold head 22 from freezing. The primary cold head 21 of the refrigerator 2 is connected with the copper heat sink 7 to cool the heat radiation shield 4.
[0051] In one of the embodiments, the air pressure detection device 9 is installed on the refrigeration tower body or on an external service tower connected to the refrigeration tower body.
[0052] The installation position of the air pressure detection device can be diversified, as long as it can detect the air pressure value in the cryogenic liquid helium Dewar 5.
[0053] In one of the embodiments, the air pressure detecting device 9 is installed inside the outer cylinder 3.
[0054] In one of the embodiments, the air pressure detecting device 9 is a gas pressure measuring probe.
[0055] In one of the embodiments, the refrigeration tower of the superconducting iron remover includes:
[0056] Primary bellows 1, refrigerator 2, outer cylinder 3, heat radiation screen 4, cryogenic liquid helium Dewar 5, secondary bellows 6, copper heat sink 7, heating device 8, air pressure detection device 9, heat exchanger fin Chip 10, liquid helium 11, safety valve 12, control device 13, and signal amplifier 14.
[0057] In the embodiment of the present invention, the pressure value in the cryogenic liquid helium Dewar 5 is detected or monitored by a gas pressure measuring probe, and the pressure value is transmitted to the control device 13 through the signal amplifier 14, and the control device 13 determines whether the pressure value is lower than the preset minimum pressure If it is less than the value, send a control signal to the heating device 8 or directly control the heating device 8 to turn on the heating function, if it is greater than the preset maximum pressure value, send a control signal to the heating device 8 or directly control the heating device 8 to turn off the heating Features. By putting the refrigeration tower in a slightly positive working state, the parts that are prone to freezing inside the refrigerator 2 no longer freeze.
[0058] Reference Figure 5 On the other hand, the present invention also provides a method for controlling a refrigeration tower with a superconducting iron remover, which includes:
[0059] Step S501, detecting the pressure value in the cryogenic liquid helium dewar of the refrigeration tower;
[0060] In step S502, if the detected air pressure value is less than the preset minimum air pressure value, the heating function of the heating control device of the refrigeration tower is turned on.
[0061] The embodiment of the present invention makes the refrigeration tower work under slight positive pressure, so that the inside of the refrigeration tower no longer freezes, thereby improving the working efficiency of the refrigeration tower and the speed of replacing the refrigerator 2.
[0062] In one of the embodiments, if it is detected that the pressure value in the low-temperature liquid helium Dewar is greater than the preset maximum pressure value, the heating function of the heating control device is turned off.
[0063] What has been described above are only the principles and preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, based on the principles of the present invention, several other modifications can be made, which should also be regarded as the protection scope of the present invention.
