CN117516760A - Portable dry body temperature calibration device based on small Stirling refrigerator - Google Patents
Portable dry body temperature calibration device based on small Stirling refrigerator Download PDFInfo
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- CN117516760A CN117516760A CN202311515457.1A CN202311515457A CN117516760A CN 117516760 A CN117516760 A CN 117516760A CN 202311515457 A CN202311515457 A CN 202311515457A CN 117516760 A CN117516760 A CN 117516760A
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- temperature
- vacuum
- calibration device
- thermometer
- stirling refrigerator
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- 230000036760 body temperature Effects 0.000 title claims abstract description 15
- 238000005057 refrigeration Methods 0.000 claims abstract description 8
- 238000012546 transfer Methods 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 47
- 229910052802 copper Inorganic materials 0.000 claims description 38
- 239000010949 copper Substances 0.000 claims description 38
- 239000006260 foam Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 26
- 239000007788 liquid Substances 0.000 abstract description 19
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 13
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009529 body temperature measurement Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000935974 Paralichthys dentatus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/005—Calibration
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a portable dry body temperature calibration device based on a small Stirling refrigerator, which comprises: a vacuum device for providing a vacuum environment; a "well" type heat-conducting device, partially housed inside said vacuum device, internally able to house a thermometer to be calibrated; a refrigeration device comprising a Stirling refrigerator partially disposed within the vacuum device, the Stirling refrigerator delivering cold to the "well" type heat transfer device; and one part of the calibration device is arranged in the well-type heat conduction device, and the other part of the calibration device is arranged in the external environment and is used for calibrating the thermometer to be calibrated. The temperature calibration device disclosed by the invention does not need to consume low-temperature fluid such as liquid nitrogen and the like, can realize high-precision temperature control in a wide temperature range from a liquid nitrogen temperature range to room temperature by only supplying power with low power from a commercial power, can be conveniently moved to a calibration site to provide calibration service, and has good operability.
Description
Technical Field
The invention relates to the technical field of temperature calibration, in particular to a portable dry body temperature calibration device based on a small Stirling refrigerator.
Background
The dry type temperature calibrator is common metering matching equipment in industrial temperature on-site calibration, and is widely applied to calibration and calibration of temperature systems by virtue of the advantages of compact structure, strong portability, high temperature rise and fall speed, wide temperature control range, strong anti-interference performance, simplicity in operation and the like.
With the rapid development of scientific research taking a low-temperature environment as a background, experimental measurement of researches such as a cell low-temperature freezing technology, a liquid fuel low-temperature storage technology and the like is more frequent. In these studies, temperature measurement in experiments using a low temperature thermometer is a common means. The calibration of the low-temperature thermometer is an indispensable ring for ensuring the measurement accuracy of the low-temperature thermometer. The equipment for calibrating the low-temperature thermometer can be generally two main types of wet devices which take low-temperature liquid as a cold source and dry devices based on refrigeration technology, wherein the latter is convenient to use and is particularly suitable for on-site calibration.
In the prior art, the lower limit of the application range of most commercial low-temperature dry-type temperature calibrators is usually above-100 ℃, and the calibration requirement of a cryogenic thermometer cannot be met. A TCL-165S-D dry body furnace such as OMEGA, ranging from-35 ℃ to 165 ℃; FLUKE 9190A dry body furnace with the measuring range between-95 ℃ and 145 ℃; the RTC159 type dry body furnace of AMETEK has the measuring range between-100 ℃ and 155 ℃. In the aspect of a dry type temperature calibration device which emphasizes portability, the portable temperature calibrator of some temperature measurement systems has the application range of room temperature to 400 ℃ and cannot calibrate a low-temperature thermometer; some portable temperature calibrators with contrast function have shock-resistant protection capability, but the temperature range does not involve low temperature; other temperature calibrator control systems focus on the acquisition, storage and display of temperature signals, nor on low temperatures. None of these calibration devices is suitable for calibration of portable cryogenic thermometers down to the liquid nitrogen temperature zone and has low operability.
In order to realize temperature calibration of a liquid nitrogen temperature zone, the existing calibration device usually uses low-temperature liquid as a cold source, and liquid needs to be frequently filled, so that the device is high in cost and not easy to carry.
Therefore, those skilled in the art have focused on providing a portable dry body temperature calibration device based on a small Stirling refrigerator, which can achieve temperature calibration as low as a liquid nitrogen temperature region, and has strong portability and good operability.
Disclosure of Invention
In view of the defects in the prior art, the technical problem to be solved by the invention is how to provide a portable temperature calibration device capable of realizing low-temperature calibration.
In order to achieve the above object, the present invention provides a portable dry body temperature calibration device based on a small-sized stirling refrigerator, comprising:
a vacuum device for providing a vacuum environment;
a "well" type heat-conducting device, partially housed inside said vacuum device, internally able to house a thermometer to be calibrated;
a refrigeration device comprising a Stirling refrigerator partially disposed within the vacuum device, the Stirling refrigerator delivering cold to the "well" type heat transfer device;
and one part of the calibration device is arranged in the well-type heat conduction device, and the other part of the calibration device is arranged in the external environment and is used for calibrating the thermometer to be calibrated.
Preferably, the vacuum device comprises a vacuum barrel, wherein one end of the vacuum barrel is provided with a top annular flange plate, and the side wall of the vacuum barrel is provided with a suction nozzle; the Stirling refrigerator penetrates through the side wall of the vacuum barrel, a cold head of the Stirling refrigerator is arranged in the vacuum barrel, and a seal is arranged between the Stirling refrigerator and the side wall of the vacuum barrel.
Further, the 'well' type heat conduction device comprises a thin-wall pipe, a copper sleeve and a constant temperature block, one end of the copper sleeve is connected with one end of the thin-wall pipe, the thin-wall pipe penetrates through the top annular flange plate, the copper sleeve is arranged in the vacuum barrel, the constant temperature block is arranged in the 'well' of the copper sleeve, and a thermometer to be calibrated is arranged in the constant temperature block.
Further, the refrigerating device further comprises a copper braid, one end of the copper braid is connected with a cold head of the Stirling refrigerator, the other end of the copper braid is connected with the 'well' -shaped heat conduction device, and a thermal resistance sheet is clamped between the copper braid and the copper sleeve.
Further, copper wire pressing blocks are arranged in the grooves of the copper sleeves and are located on one side, close to the top annular flange plate, of the copper wire pressing blocks.
Further, a heating device is arranged in the constant temperature block, and a foam plug is arranged at the other end of the thin-wall pipe.
Further, the calibration device comprises a temperature control thermometer and a standard temperature sensor, wherein the standard temperature sensor is arranged in the constant temperature block, and the thermometer to be calibrated and the standard temperature sensor are electrically connected with the temperature control thermometer.
Preferably, the device further comprises a shell, wherein the vacuum device, the 'well' -shaped heat conduction device and the refrigerating device are arranged in the shell, and the temperature controller is arranged outside the shell.
Preferably, the device further comprises a heat dissipation air duct, wherein the heat dissipation air duct is arranged on the side face of the shell.
Preferably, the shell is provided with a control panel, a fan switch and a power switch.
The invention has at least the following beneficial technical effects:
the portable dry body temperature calibration device based on the small Stirling refrigerator provided by the invention takes the small Stirling refrigerator as a cold source, has small volume and light weight, does not need to be filled with low-temperature liquid, has strong portability, can provide enough refrigerating capacity in a liquid nitrogen temperature region, and meets the calibration requirement; the vacuum heat insulation cavity is designed, a plurality of layers of heat insulation materials are wrapped in the vacuum heat insulation cavity, copper wire pressing blocks are additionally arranged to eliminate lead leakage heat, so that the system can be cooled to a liquid nitrogen temperature region, and the temperature can be raised to the room temperature again through a heating device, thereby realizing the temperature adjustment from the liquid nitrogen low temperature region to the room temperature, and the calibration precision is high; the 'well' type design is adopted, the thermometer and the constant temperature block are isolated outside the vacuum heat insulation cavity, the constant temperature block can be taken out on the premise of not damaging a vacuum system, the thermometer is convenient to install and calibrated, and the operability is high. The temperature calibration device disclosed by the invention does not need to consume low-temperature fluid such as liquid nitrogen and the like, can realize high-precision temperature control in a wide temperature range from a liquid nitrogen temperature range to room temperature only by supplying power with low power from a commercial power, can be conveniently moved to a calibration site to provide calibration service, and has good operability.
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
Drawings
FIG. 1 is a schematic diagram of a portable dry body temperature calibration device based on a small Stirling refrigerator according to an embodiment of the invention;
FIG. 2 is a schematic illustration of a housing of a portable stem temperature calibration device based on a small Stirling cooler in accordance with an embodiment of the invention;
fig. 3 is a schematic diagram of a "well" type heat conduction device of a portable stem body temperature calibration device based on a small stirling cooler in accordance with an embodiment of the present invention.
In the figure, 1-shell, 2-temperature control temperature measuring instrument, 3-Stirling refrigerator, 4-vacuum barrel, 5-top annular flange plate, 6-bottom annular flange plate, 7-thin-wall tube, 8-oxygen-free copper sleeve, 9-copper wire pressing block, 10-constant temperature block, 11-foam plug, 12-thermal resistance sheet, 13-copper braid, 14-heating device, 15-standard temperature sensor, 16-temperature sensor lead wire, 17-refrigerator cold head, 18-self-sealing suction nozzle, 19-heat dissipation air duct, 20-control panel, 21-electric fan switch, 22-power switch, 23-aviation plug, 24-USB interface.
Detailed Description
The following describes preferred embodiments of the present invention to make the technical contents thereof more clear and easy to understand. The present invention may be embodied in many different forms of embodiments and the scope of the present invention is not limited to only the embodiments described herein.
In the drawings, like structural elements are referred to by like reference numerals and components having similar structure or function are referred to by like reference numerals. The dimensions and thickness of each component shown in the drawings are arbitrarily shown, and the present invention is not limited to the dimensions and thickness of each component. The thickness of the components is exaggerated in some places in the drawings for clarity of illustration.
The invention provides a portable dry body temperature calibration device based on a small Stirling refrigerator, which takes the small Stirling refrigerator as a cold source and can realize accurate temperature control in a temperature interval of 78K to 300K; and (3) placing the standard temperature sensor and the thermometer to be calibrated in the same temperature field by a comparison method, and calibrating the thermometer to be calibrated by using a temperature-resistance graduation meter of the standard temperature sensor.
As shown in fig. 1, the portable dry body temperature calibration device based on the small-sized stirling refrigerator of the embodiment comprises a vacuum device, a 'well' -shaped heat conduction device, a refrigeration device and a calibration device, wherein the vacuum device provides a vacuum environment, the 'well' -shaped heat conduction device provides a stable temperature environment, and the vacuum device and the vacuum heat conduction device form a vacuum heat insulation cavity together; the refrigerating device inputs cold energy to realize low-temperature calibration, and the calibration device calibrates a thermometer to be calibrated.
In the embodiment, the vacuum device comprises a vacuum barrel 4, and the bottom of the vacuum barrel 4 is provided with a bottom annular flange plate 6 for supporting the vacuum barrel 4; the top of the vacuum barrel 4 is connected with a top annular flange plate 5 for providing support for the "well" type heat conduction device. The side wall of the vacuum drum 4 is provided with two flange interfaces, one of which is adapted to be connected to a self-sealing suction nozzle 18 and the other of which is adapted to be connected to a refrigerating device. The self-sealing suction nozzle 18 is used as a vacuum suction port and can be connected with a molecular pump unit to vacuumize the interior of the vacuum barrel 4; after the evacuation phase is completed, the vacuum drum 4 is maintained in a long-term vacuum condition by sealing the self-sealing suction nozzle 18.
In one embodiment, the vacuum drum 4 has an inner diameter of 150mm and a height of 400mm, the upper flange interface with the self-sealing suction nozzle 18 is a KF16 flange, and the lower flange interface with the refrigeration device is a KF40 flange.
The refrigerating device comprises a Stirling refrigerator 3 and a copper braid 13, wherein the Stirling refrigerator 3 passes through another flange interface on the vacuum barrel 4, and a refrigerator cold head 17 is positioned inside the vacuum barrel 4. One end of the copper braid 13 is connected with a refrigerator cold head 17 through a bolt, and the other end is connected with a 'well' -shaped heat conduction device. In one embodiment, copper braid 13 is 70mm in overall length and 4mm in thickness, folded into a "W" configuration.
As shown in fig. 3, the "well" type heat conduction device comprises a thin-walled tube 7 and an oxygen-free copper sleeve 8, wherein the thin-walled tube 7 is made of stainless steel, a groove is formed in the oxygen-free copper sleeve 8, and one end of the thin-walled tube 7 and one open end of the oxygen-free copper sleeve 8 are welded and sealed by dissimilar metals to form the "well" type groove together. In one embodiment, the thin-walled tube 7 has an inner diameter of 40mm, a wall thickness of 0.3mm and a height of 160mm; the inner diameter of the oxygen-free copper sleeve 8 is 30mm, the wall thickness is 10mm, and the height is 205mm. The thin-wall pipe 7 passes through the top annular flange plate 5, and the thin-wall pipe 7 and the oxygen-free copper sleeve 8 are both arranged in the vacuum barrel 4. The copper braid 13 is connected with the other end of the oxygen-free copper sleeve 8 through bolts, and a thermal resistance sheet 12 is clamped between the copper braid 13 and the oxygen-free copper sleeve 8.
A constant temperature block 10 is arranged in the well-shaped groove of the oxygen-free copper sleeve 8, and a copper wire pressing block 9 is arranged above the constant temperature block 10. The end of the thin-wall pipe 7 close to the top annular flange plate 5 is provided with a foam plug 11, and the foam plug 11 is used for isolating the air convection between the outside and the well-type groove of the oxygen-free copper sleeve 8. The center of the top surface of the constant temperature block 10 is perforated for inserting a heating device 14; four holes which are symmetrical in center are drilled around the center hole, one of the holes is used for placing the standard temperature sensor 15, and the other holes are used for placing the thermometer to be calibrated. The direction of the holes is along the length direction of the oxygen-free copper sleeve 8, and the number and the size of the holes can be increased or decreased according to actual needs, but the holes are required to be ensured to be in a central symmetry state.
In a specific embodiment, the constant temperature block 10 is a cylinder with the bottom surface diameter of 30mm and the height of 206mm, the copper wire pressing block 9 is a round table with the top surface diameter of 40mm, the bottom surface diameter of 30mm and the height of 10mm, the foam plug 11 is a cylinder with the diameter of 40mm and the height of 20mm, and the thermal resistance sheet 12 is formed by superposing 5 square thin sheets with the side length of 28mm, and the total thickness is 1mm; the diameter of the opening in the thermostatic block 10 is 6mm.
The calibration device comprises a temperature control thermometer 2 and a standard temperature sensor 15, wherein the standard temperature sensor 15 is positioned in a hole of the constant temperature block 10 and is connected with the temperature control thermometer 2 through a temperature sensor lead 16, the thermometer to be calibrated is also connected with the temperature control thermometer 2 through the temperature sensor lead 16, and the standard temperature sensor 15 and the thermometer to be calibrated are displayed and controlled by the temperature control thermometer 2. Channels are reserved on the side face of the copper wire pressing block 9 and the foam plug 11, so that the temperature sensor lead 16 can pass through.
In this embodiment, the temperature calibration device further comprises a housing 1, and other components except the temperature control and measurement instrument 2 are all arranged inside the housing 1, so that the temperature calibration device of this embodiment has the characteristic of portability. A heat radiation passage 19 is also provided in the outer wall of the housing 1 for heat radiation of the stirling cooler 3. As shown in fig. 2, a control panel 20 and a fan switch 21 are arranged on the front surface of the shell 1, the control panel 20 is used for controlling the internal components, and the fan switch 21 is used for controlling the start and stop of a fan in the heat dissipation air duct 19; the back of the shell 1 is provided with a power switch 22, an aviation plug 23 and a USB interface 24, wherein the power switch 22 is used for controlling the on-off of a circuit, and the aviation plug 23 and the USB interface 24 provide interfaces for power and data exchange. In this embodiment, the housing 1 is an aluminum alloy housing.
The working process of the portable dry body temperature calibration device based on the small Stirling refrigerator of the embodiment is as follows: firstly, a standard thermometer and a plurality of thermometers to be measured are inserted into a round hole at the top of a constant temperature block 10, and heat conduction silicone grease can be smeared on the outer side of the thermometer according to the requirement; then placing a copper wire pressing block 9 as a lead heat sink on the top of the constant temperature block 10, and plugging a foam plug 11 on the top; after the system is assembled, a tool is used to pull out the sealing core plug in the self-sealing suction nozzle 18, and the vacuum degree of the vacuum barrel 4 is pumped to 10 by a molecular pump unit -3 After Pa magnitude, pushing back the plug core, disconnecting the vacuumizing pump system, and starting fans in the small Stirling refrigerator 3 and the radiating air duct 19; after the indication of a standard thermometer in the constant temperature block 10 displayed by the temperature control and temperature measurement instrument 2 is reduced to below 90K, starting the temperature control and temperature measurement instrument 2, setting the temperature of the standard thermometer to a preset value, and then entering a calibration stage; in the calibration process, the target temperature of the temperature control and measurement instrument 2 needs to be frequently regulated, so that the thermometer indication number is stable at a plurality of temperatures; temperature within 30 minutes of standard thermometer and thermometer to be measuredAnd when the degree fluctuation is smaller than 0.05K, the calibration working condition is stable, at the moment, the temperature indication of the standard thermometer and the resistance indication of the thermometer to be measured are taken, and the graduation table is drawn.
In the embodiment, the small Stirling refrigerator is used as a cold source, and compared with other cold sources, the small Stirling refrigerator is small in volume and light in weight, low-temperature liquid does not need to be filled, enough refrigerating capacity can be provided in a liquid nitrogen temperature region, and the calibration requirement is met; the volume of the calibration device can reach 500 x 300 x 450mm, the mass can reach 25kg, and the portability is strong. According to the embodiment, the design of the vacuum heat insulation cavity is adopted, the multilayer heat insulation material is wrapped inside, the copper wire pressing blocks are additionally arranged to eliminate lead leakage heat, the system can be cooled to a liquid nitrogen temperature region, the temperature can be raised to the room temperature again through the heating device, the temperature adjustment from the liquid nitrogen low temperature region to the room temperature is realized, and the calibration precision is high. The embodiment adopts a 'well' design, isolates the thermometer and the constant temperature block outside the vacuum heat insulation cavity, can take out the constant temperature block on the premise of not damaging a vacuum system, is convenient for installing the calibrated thermometer, and has strong operability; and simultaneously, the heat conduction effect is utilized to absorb the cold energy from the refrigerator, so as to achieve the refrigeration effect.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (10)
1. A portable dry body temperature calibration device based on a small stirling cooler, comprising:
a vacuum device for providing a vacuum environment;
a "well" type heat-conducting device, partially housed inside said vacuum device, internally able to house a thermometer to be calibrated;
a refrigeration device comprising a Stirling refrigerator partially disposed within the vacuum device, the Stirling refrigerator delivering cold to the "well" type heat transfer device;
and one part of the calibration device is arranged in the well-type heat conduction device, and the other part of the calibration device is arranged in the external environment and is used for calibrating the thermometer to be calibrated.
2. The portable dry body temperature calibration apparatus based on a small stirling cooler according to claim 1 wherein the vacuum means comprises a vacuum barrel having a top annular flange plate at one end and a suction nozzle on a side wall of the vacuum barrel; the Stirling refrigerator penetrates through the side wall of the vacuum barrel, a cold head of the Stirling refrigerator is arranged in the vacuum barrel, and a seal is arranged between the Stirling refrigerator and the side wall of the vacuum barrel.
3. The portable stem temperature calibration device based on a small Stirling refrigerator according to claim 2, wherein the 'well' type heat conduction device comprises a thin-walled tube, a copper sleeve and a constant temperature block, one end of the copper sleeve is connected with one end of the thin-walled tube, the thin-walled tube penetrates through the top annular flange plate, the copper sleeve is arranged in the vacuum barrel, the constant temperature block is arranged in the 'well' of the copper sleeve, and a thermometer to be calibrated is arranged in the constant temperature block.
4. A portable stem temperature calibration device based on a small stirling cooler according to claim 3 wherein the cooler further comprises a copper braid, one end of the copper braid is connected to the cold head of the stirling cooler, the other end of the copper braid is connected to the "well" type heat transfer device, and a thermal resistive sheet is sandwiched between the copper braid and the copper sleeve.
5. A portable stem temperature calibration device based on a small stirling cooler in accordance with claim 3 wherein copper wire blocks are disposed in the copper sleeve grooves, the copper wire blocks being located on a side of the copper sleeve adjacent the top annular flange plate.
6. The portable dry body temperature calibration device based on a small Stirling refrigerator as claimed in claim 5, wherein a heating device is arranged in the constant temperature block, and a foam plug is arranged at the other end of the thin-walled tube.
7. The portable stem temperature calibration device based on a small Stirling refrigerator according to claim 5, wherein the calibration device comprises a temperature control thermometer and a standard temperature sensor, wherein the standard temperature sensor is arranged in the constant temperature block, and a thermometer to be calibrated and the standard temperature sensor are electrically connected with the temperature control thermometer.
8. The portable stem temperature calibration device based on a small stirling cooler of claim 7 further comprising a housing, wherein the vacuum device, "well" type heat transfer device, refrigeration device are disposed within the housing, and the temperature controller is disposed outside the housing.
9. The portable stem temperature calibration device based on a small stirling cooler of claim 8 further comprising a heat sink air duct disposed on a side of the housing.
10. The portable stem temperature calibration device based on a small stirling cooler of claim 8 wherein the housing is provided with a control panel, a fan switch, and a power switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311515457.1A CN117516760A (en) | 2023-11-14 | 2023-11-14 | Portable dry body temperature calibration device based on small Stirling refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311515457.1A CN117516760A (en) | 2023-11-14 | 2023-11-14 | Portable dry body temperature calibration device based on small Stirling refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117516760A true CN117516760A (en) | 2024-02-06 |
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ID=89754534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311515457.1A Pending CN117516760A (en) | 2023-11-14 | 2023-11-14 | Portable dry body temperature calibration device based on small Stirling refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117516760A (en) |
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2023
- 2023-11-14 CN CN202311515457.1A patent/CN117516760A/en active Pending
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