CN-224230426-U - Novel portable liquid nitrogen reflux refrigerating high-purity germanium detector

Abstract

The utility model discloses a novel portable liquid nitrogen reflux refrigeration high-purity germanium detector which comprises a Dewar can, a low-temperature refrigerator, a cold guide rod, a vacuum mechanism and a high-purity germanium detector, wherein liquid nitrogen is filled in the Dewar can, the low-temperature refrigerator is installed at the Dewar can, a refrigerating end of the low-temperature refrigerator is inserted into the Dewar can, the vacuum mechanism is installed at one end of the Dewar can, the high-purity germanium detector is installed in the vacuum mechanism, the cold guide rod is connected with the high-purity germanium detector and the Dewar can, the novel portable liquid nitrogen reflux refrigeration high-purity germanium detector can cool the interior of the Dewar can through the low-temperature refrigerator, so that gasified nitrogen in the Dewar can be condensed into liquid nitrogen, and then the high-purity germanium detector is in a low-temperature state through the heat exchange effect of the cold guide copper rod.

Inventors

• ZHONG HUAQIANG
• HUANG HAI

Assignees

• 广东清澜华创新技术有限公司

Dates

Publication Date

20260512

Application Date

20250610

Claims (6)

1. 1. The novel portable liquid nitrogen reflux refrigerating high-purity germanium detector is characterized by comprising a Dewar tank, a low-temperature refrigerator, a cold guide rod, a vacuum mechanism and a high-purity germanium detector, wherein liquid nitrogen is filled in the Dewar tank, the low-temperature refrigerator is arranged at the Dewar tank, the refrigerating end of the low-temperature refrigerator is inserted into the Dewar tank, the vacuum mechanism is arranged at one end of the Dewar tank, the high-purity germanium detector is arranged in the vacuum mechanism, one end of the cold guide rod is abutted against the high-purity germanium detector, the cold guide rod is arranged in the vacuum mechanism, and the other end of the cold guide rod is inserted into the Dewar tank.
2. 2. The novel portable liquid nitrogen reflux refrigeration high-purity germanium detector according to claim 1, wherein the cryocooler is arranged in a vacuum interlayer of a Dewar.
3. 3. The novel portable liquid nitrogen reflux refrigerating high-purity germanium detector according to claim 1, wherein the cold conducting rod is a cold conducting copper rod.
4. 4. The novel portable liquid nitrogen reflux refrigerating high-purity germanium detector according to claim 1, wherein a material injection port is formed in one side of the dewar tank.
5. 5. The novel portable liquid nitrogen reflux refrigerating high-purity germanium detector according to claim 1, wherein the vacuum mechanism comprises a vacuum tube and one end of the vacuum tube is fixedly connected with the dewar tank, the other end of the vacuum tube is provided with the vacuum tube, the high-purity germanium detector is arranged in the vacuum tube, and the cold conducting copper rod is arranged in the vacuum tube.
6. 6. The novel portable liquid nitrogen reflux refrigerating high-purity germanium detector according to claim 1, wherein the cold guide rod is of an L-shaped structure, and the bent end of the cold guide rod is inserted into the Dewar can.

Description

Novel portable liquid nitrogen reflux refrigerating high-purity germanium detector Technical Field The utility model relates to the technical field of high-purity germanium detectors, in particular to a novel portable liquid nitrogen reflux refrigerating high-purity germanium detector. Background The high-purity germanium detector is widely applied in the fields of environmental protection, nuclear power, homeland security, scientific research and the like due to the excellent energy resolution and higher detector efficiency. However, the high-purity germanium detector needs a low-temperature environment when working, and conventionally adopts liquid nitrogen or a low-temperature refrigerator as a cold source to enable the detector in the system to reach the working temperature. The traditional liquid nitrogen type refrigeration, the liquid nitrogen reflux system has poor performance, needs to be frequently filled with liquid nitrogen, is troublesome to operate and has insufficient convenience, the electric refrigeration meets the requirement that the high-purity germanium can work when being electrified, the convenience of the system is greatly improved, but the traditional electric refrigeration system directly acts on the high-purity germanium detector, and can cause the high-purity germanium detector to be subjected to a large amount of electromagnetic interference to influence the detection accuracy of the high-purity germanium detector, and the traditional electric refrigeration structure is complex, has higher cost and larger volume and is inconvenient for a user to carry. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a novel portable liquid nitrogen reflux refrigeration high-purity germanium detector. In order to achieve the above purpose, the present utility model provides the following technical solutions: The utility model provides a novel portable liquid nitrogen congeals high-purity germanium detector that refrigerates, includes dewar jar, cryocooler, leads cold stick, vacuum mechanism and high-purity germanium detector, has filled liquid nitrogen in the dewar jar, cryocooler installs in dewar jar department, and the refrigeration end of cryocooler inserts in the dewar jar, and vacuum mechanism installs the one end at the dewar jar, and high-purity germanium detector installs in vacuum mechanism, leads cold stick's one end and high-purity germanium detector to offset, leads cold stick and installs in vacuum mechanism, leads cold stick's the other end to insert in the dewar jar. Further, the cryocooler is mounted in the vacuum interlayer of the dewar. Further, the cold guide rod is a cold guide copper rod. Further, a material injection port is formed in one side of the dewar tank. Further, the vacuum mechanism comprises a vacuum tube and one end of the vacuum tube of the vacuum cover, wherein the vacuum tube is fixedly connected with the dewar tank, the other end of the vacuum tube is provided with the vacuum cover, the high-purity germanium detector is arranged in the vacuum cover, and the cold conducting copper rod is arranged in the vacuum tube. Further, the cold guide rod is of an L-shaped structure, and the bent end of the cold guide rod is inserted into the dewar tank. Compared with the prior art, the utility model provides a novel portable liquid nitrogen reflux refrigeration high-purity germanium detector, which has the following beneficial effects: The novel portable liquid nitrogen reflux refrigerating high-purity germanium detector is characterized in that a low-temperature refrigerator is arranged in a vacuum interlayer of the dewar tank, so that the low-temperature refrigerator can cool the interior of the dewar tank, further, gasified nitrogen in the dewar tank is condensed into liquid nitrogen, and the high-purity germanium detector is cooled through a cold conducting copper rod, so that the high-purity germanium detector is in a low-temperature state, and the high-purity germanium detector can work normally; the detector has smaller volume, is convenient for users to carry, effectively condenses nitrogen in the Dewar can into liquid nitrogen through the synergistic effect of the liquid nitrogen and the cryocooler, effectively reduces the filling times of the liquid nitrogen and reduces the electromagnetic interference of a circuit system to the high-purity germanium detector. Drawings FIG. 1 is a perspective view of the present utility model; fig. 2 is a cross-sectional structural view of the present utility model. In the figure, a Dewar tank, a material injection port, a low-temperature refrigerator, a cold conducting copper rod, a vacuum tube, a vacuum cover and a high-purity germanium detector are respectively arranged in the figure 1, the low-temperature refrigerator, the cold conducting copper rod, the vacuum tube and the vacuum cover. Detailed Description The following description of the embodiments of the present utility mod