CN217359294U - Temperature control system - Google Patents
Temperature control system Download PDFInfo
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- CN217359294U CN217359294U CN202221264823.1U CN202221264823U CN217359294U CN 217359294 U CN217359294 U CN 217359294U CN 202221264823 U CN202221264823 U CN 202221264823U CN 217359294 U CN217359294 U CN 217359294U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The utility model discloses a temperature control system, which is used for controlling the temperature of a sample platform and comprises an air pressure maintaining system, a closed loop air path refrigerating system and a temperature maintaining system; the closed-loop gas path refrigerating system comprises a circulating pump, a first heat exchange pipe and a second heat exchange pipe, wherein the circulating pump, the first heat exchange pipe and the second heat exchange pipe are in circulating connection through pipelines; the temperature maintaining system comprises a refrigerating liquid tank and a heating assembly, refrigerating liquid is arranged in the refrigerating liquid tank, the first heat exchange tube is positioned in the refrigerating liquid, the heating assembly and the second heat exchange tube are both arranged in the sample table, and the sample table and part of pipelines are positioned in the sealed cavity; the air pressure maintaining system is used for providing air with preset pressure to the closed-loop air path refrigerating system through a pipeline. The utility model discloses can solve the big problem of prior art temperature fluctuation.
Description
Technical Field
The utility model relates to a detecting instrument technical field especially relates to a temperature control system.
Background
With the continuous development and updating of material research technology, the demand of low-temperature detection environment is increasing day by day, a temperature control system is required to be used for keeping a tested sample stage in a low-temperature environment, liquid nitrogen is used as a refrigerant which is easy to rapidly vaporize and rapidly reduces the ambient temperature, and the liquid nitrogen is widely applied in the fields of low-temperature industry, beauty treatment and medical treatment and the like which need to work in a low-temperature or variable-temperature environment, so that the demand of a cooling device using the liquid nitrogen as a cold source is huge. In most cases, after the liquid nitrogen keeps a certain flow, the temperature of the part to be cooled is easy to continuously reduce and exceeds the required temperature, or the preset low temperature cannot be kept along with the heat exchange.
The utility model with the publication number of CN201547487U discloses an automatic control device for liquid nitrogen delivery, which is not ideal in temperature control effect and has a temperature control precision greater than 5K. Application publication No. is CN 105627089A's utility model discloses a liquid nitrogen pump device with function is flowed in liquid nitrogen steady voltage, adopts the resistance wire heating to make the liquid nitrogen flow out through heating circuit and keeps stable, but the voltage limiting is ordinary relief valve, and the liquid nitrogen of unnecessary pressure will flow to the air, and can't independently control liquid nitrogen container boost pressure, and the flexibility is relatively poor to still can't reach the accuse temperature purpose of high accuracy.
With the development of low-temperature technology, a scheme of controlling temperature by controlling the temperature reduction of evaporated liquid nitrogen and simultaneously matching PID (proportion integration differentiation) regulation and control of a heating module is provided, and the method is only suitable for a temperature area (more than or equal to 110K) far away from the boiling point of the liquid nitrogen. The temperature control with high precision (within +/-0.005K) can not be achieved near the boiling point of liquid nitrogen (76.59K-110K), because near the boiling point of liquid nitrogen, nitrogen elements have two states of gas state and liquid state, and the two states are very unstable in a temperature region near the boiling point of liquid nitrogen, and are easy to mutually convert, so that relatively large and irregular temperature fluctuation is caused.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model aims to provide a temperature control system to solve the big problem of prior art temperature fluctuation.
The utility model provides a temperature control system, which is used for controlling the temperature of a sample table and comprises an air pressure maintaining system, a closed loop air path refrigerating system and a temperature maintaining system;
the closed-loop gas path refrigerating system comprises a circulating pump, a first heat exchange pipe and a second heat exchange pipe, wherein the circulating pump, the first heat exchange pipe and the second heat exchange pipe are in circulating connection through pipelines;
the temperature maintaining system comprises a refrigerating liquid tank and a heating assembly, refrigerating liquid is arranged in the refrigerating liquid tank, the first heat exchange tube is located in the refrigerating liquid, the heating assembly and the second heat exchange tube are both arranged inside the sample stage, and the sample stage and part of the pipeline are located in a sealed cavity;
the air pressure maintaining system is used for providing air with preset pressure to the closed-loop air path refrigerating system through the pipeline, and the air provided by the air pressure maintaining system firstly reaches the second heat exchange pipe through the pipeline under the action of the circulating pump, then reaches the second heat exchange pipe through the pipeline positioned in the sealed cavity, and finally returns to the circulating pump through the pipeline to realize air flow circulation.
As an alternative embodiment, the pneumatic pressure maintenance system comprises a gas supply bottle and a pressure reducing valve, the gas supply bottle supplying gas into the pipeline through the pressure reducing valve.
As an optional implementation manner, the air pressure maintaining system further includes a first electromagnetic valve, a second electromagnetic valve and a digital pressure controller, the first electromagnetic valve and the second electromagnetic valve are respectively connected to the pipeline, and the first electromagnetic valve and the second electromagnetic valve are respectively electrically connected to the digital pressure controller;
when the pressure in the pipeline is lower than the preset pressure, the digital pressure controller controls the first electromagnetic valve to be opened, and gas is supplemented into the pipeline to increase the pressure in the pipeline; when the pressure in the pipeline is higher than the preset pressure, the digital pressure controller controls the second electromagnetic valve to be opened, so that the pipeline releases gas outwards, and the pressure in the pipeline is reduced.
As an optional implementation manner, the air pressure maintaining system further includes a first needle valve, the first needle valve is connected to the first solenoid valve, and the first needle valve is used for controlling the speed of the pressurization in the pipeline.
As an optional implementation manner, the air pressure maintaining system further includes a second needle valve, the second needle valve is connected to the second solenoid valve, and the second needle valve is used for controlling the speed of reducing the pressure in the pipeline.
As an optional embodiment, the temperature maintenance system further comprises a temperature thermocouple, and the temperature thermocouple is installed inside the sample stage.
As an optional implementation manner, the temperature maintaining system further includes a temperature control instrument, the temperature control instrument is located outside the sealed cavity, and the heating assembly and the temperature thermocouple are electrically connected to the temperature control instrument respectively.
As an alternative embodiment, the first heat exchange tube is a heat exchange spiral copper tube.
As an alternative embodiment, the second heat exchange tube is a heat exchange spiral copper tube.
As an alternative embodiment, the heating component uses a heating resistor.
According to the utility model provides a temperature control system, maintain the system through atmospheric pressure and provide the gas that has preset pressure to closed loop gas circuit refrigerating system, when the gas velocity of flow in the pipeline reaches a certain specified value, the gas in the pipeline will become the laminar flow of relative stability, and simultaneously, gas in the pipeline is through first hot exchange pipe after, gas temperature reduces to and refrigerates liquid temperature and equals, reach second hot exchange pipe department and carry out the heat exchange with the sample platform through the pipeline that is located in the sealed cavity again and cool down for the sample platform, can heat the sample platform through heating element, when the heating power of sample platform equals with the heat exchange power of second hot exchange pipe, the temperature of sample platform will tend to stability; when the heating power of the sample table is larger than the heat exchange power of the second heat exchange tube, the temperature of the sample table is increased; when the heating power of the sample platform is smaller than the heat exchange power of the second heat exchange tube, the temperature of the sample platform is reduced, the critical value of the low temperature of the sample platform is the temperature value of the refrigerating fluid, the aim of stable temperature control can be finally achieved, and the actual measurement shows that the temperature fluctuation is within +/-0.005K.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of embodiments of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a temperature control system according to an embodiment of the present invention;
FIG. 2 is a graph showing the temperature test results of the present invention;
fig. 3 is a graph showing the results of a temperature test of the prior art.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a temperature control system for controlling the temperature of the sample stage 14, wherein the temperature control system includes an air pressure maintaining system, a closed loop air path refrigerating system and a temperature maintaining system.
The air pressure maintaining system comprises an air supply bottle 1, a pressure reducing valve 2, a digital pressure controller 3, a first electromagnetic valve 4, a first needle valve 5, a second electromagnetic valve 6 and a second needle valve 20.
The closed-loop gas path refrigerating system comprises a circulating pump 19, a first heat exchange tube 16 and a second heat exchange tube 12, wherein the circulating pump 19, the first heat exchange tube 16 and the second heat exchange tube 12 are in circulating connection through a pipeline 18. In the present embodiment, the first heat exchange tube 16 and the second heat exchange tube 12 both use heat exchange spiral copper tubes.
The temperature maintenance system comprises a tank of refrigerating liquid 17 and a heating assembly 9.
A refrigerant liquid tank 17 is provided with a refrigerant liquid 15, and a first heat exchange tube 16 is present in the refrigerant liquid 15, the refrigerant liquid 15 being, for example, liquid nitrogen.
The heating assembly 9 and the second heat exchange tube 12 are both mounted inside a sample stage 14, the sample stage 14 and a portion of the tube 18 are located inside a sealed chamber 13, and the sealed chamber 13 has a vacuum environment 8.
Specifically, nitrogen gas is filled in the gas supply cylinder 1, and the gas supply cylinder 1 replenishes gas into the pipe 18 through the pressure reducing valve 2.
The first solenoid valve 4 and the second solenoid valve 6 are respectively connected with the pipeline 18, and the first solenoid valve 4 and the second solenoid valve 6 are respectively electrically connected with the digital pressure controller 3.
When the pressure in the pipeline 18 is lower than the preset pressure, the digital pressure controller 3 controls the first electromagnetic valve 4 to be opened to supplement gas into the pipeline 18 so as to increase the pressure in the pipeline 18; when the pressure in the pipeline 18 is higher than the preset pressure, the digital pressure controller 3 controls the second electromagnetic valve 6 to be opened, so that the pipeline 18 releases gas outwards to reduce the pressure in the pipeline 18.
Wherein, the first needle valve 5 is connected with the first electromagnetic valve 4, and the first needle valve 5 is used for controlling the pressurizing speed in the pipeline 18. A second needle valve 20 is connected to the second solenoid valve 6, the second needle valve 20 being adapted to control the rate of pressure reduction in the conduit 18.
The operation process of the air pressure maintaining system is as follows:
when the pressure in the pipe 18 is required to reach Q kpa (0 kpa as atmospheric pressure), the pressure at the pressure reducing end of the pressure reducing valve 2 is set to (Q +1) kpa, and the pressure value of the digital pressure controller 3 is set to Q kpa. When the pressure in the pipeline 18 is lower than a set value Q kpa, the digital pressure controller 3 controls the first electromagnetic valve 4 to be opened, so that gas is supplemented into the pipeline 18 and the pressure is increased; when the pressure in the pipe 18 is higher than the set value Q kpa, the digital pressure controller 3 controls the second solenoid valve 6 to open, and the pipe 18 releases gas to the outside and reduces the pressure to maintain a certain pressure.
The air pressure maintaining system provides air with preset pressure to the closed loop air path refrigerating system through a pipeline 18, the air provided by the air pressure maintaining system firstly reaches the first heat exchange pipe 16 through the pipeline 18 under the action of a circulating pump 19, then reaches the second heat exchange pipe 12 through the pipeline 18 in the sealed cavity 13, and finally returns to the circulating pump 19 through the pipeline 18 to realize air flow circulation.
In this embodiment, the temperature maintaining system further includes a temperature control instrument 10 and a temperature thermocouple 11, and the temperature thermocouple 11 is installed inside the sample stage 14. The temperature control instrument 10 is positioned outside the sealed cavity 13, and the heating component 9 and the temperature thermocouple 11 are respectively electrically connected with the temperature control instrument 10. The temperature of the sample stage 14 is monitored by the temperature thermocouple 11, and the monitored temperature is displayed by the temperature control instrument 10. In addition, in the present embodiment, the heating assembly 9 employs a heating resistor, and an operator can adjust the current of the heating resistor by operating the temperature control instrument 10, thereby controlling the heating temperature of the heating assembly 9.
The air pressure maintaining system provides air with preset pressure to the closed-loop air path refrigerating system through a pipeline 18, the air in the pipeline 18 passes through a first heat exchange pipe 16, the air temperature is reduced to be equal to the temperature of refrigerating fluid 15, the air passes through a pipeline 18 positioned in a sealed cavity 13 to reach a second heat exchange pipe 12 to exchange heat with the sample table 14 so as to reduce the temperature of the sample table 14, the sample table 14 can be heated through a heating assembly 9, and when the heating power of the sample table 14 is equal to the heat exchange power of the second heat exchange pipe 12, the temperature of the sample table 14 tends to be stable; when the heating power of the sample stage 14 is greater than the heat exchange power of the second heat exchange tube 12, the temperature of the sample stage 14 will rise; when the heating power of the sample stage 14 is smaller than the heat exchange power of the second heat exchange tube 12, the temperature of the sample stage 14 will be reduced, and the critical value of the low temperature of the sample stage 14 is the temperature value of the cooling liquid 15, so that the purpose of stable temperature control can be finally achieved.
Fig. 2 and fig. 3 are the temperature test result chart of the utility model and prior art respectively, and the result shows, the utility model discloses a temperature fluctuation is within 0.005K, and prior art's temperature fluctuation is about 2K, the utility model has obvious advantage.
In summary, according to the utility model provides a temperature control system, maintain the system through atmospheric pressure and provide the gas that has preset pressure to closed loop gas circuit refrigerating system, when the gas velocity of flow in the pipeline reaches a certain specified value, the gas in the pipeline will become the laminar flow of relative stability, and simultaneously, gas in the pipeline passes through behind first hot exchange tube, gas temperature reduces to and refrigerates liquid temperature and equals, reach second hot exchange tube department and carry out the heat exchange with the sample platform through the pipeline that is located in the sealed cavity again and thereby cool down the sample platform, can heat the sample platform through the heating element, when the heating power of sample platform equals with the heat exchange power of second hot exchange tube, the temperature of sample platform will tend to stability; when the heating power of the sample stage is greater than the heat exchange power of the second heat exchange tube, the temperature of the sample stage is increased; when the heating power of the sample platform is smaller than the heat exchange power of the second heat exchange tube, the temperature of the sample platform is reduced, the critical value of the low temperature of the sample platform is the temperature value of the refrigerating fluid, the aim of stable temperature control can be finally achieved, and the actual measurement shows that the temperature fluctuation is within +/-0.005K.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A temperature control system is used for controlling the temperature of a sample stage and is characterized by comprising an air pressure maintaining system, a closed loop air path refrigerating system and a temperature maintaining system;
the closed-loop gas path refrigerating system comprises a circulating pump (19), a first heat exchange tube (16) and a second heat exchange tube (12), wherein the circulating pump (19), the first heat exchange tube (16) and the second heat exchange tube (12) are in circulating connection through a pipeline (18);
the temperature maintaining system comprises a refrigerating liquid tank (17) and a heating assembly (9), refrigerating liquid (15) is arranged in the refrigerating liquid tank (17), a first heat exchange tube (16) is located in the refrigerating liquid (15), the heating assembly (9) and a second heat exchange tube (12) are both installed inside a sample table (14), and the sample table (14) and a part of pipelines (18) are located in a sealed cavity (13);
the air pressure maintaining system is used for providing air with preset pressure for the closed-loop air path refrigerating system through a pipeline (18), the air provided by the air pressure maintaining system firstly reaches the first heat exchange pipe (16) through the pipeline (18) under the action of a circulating pump (19), then reaches the second heat exchange pipe (12) through the pipeline (18) in the sealed cavity (13), and finally returns to the circulating pump (19) through the pipeline (18) to realize air flow circulation.
2. Temperature control system according to claim 1, characterized in that the pneumatic pressure maintenance system comprises a gas supply cylinder (1) and a pressure reducing valve (2), the gas supply cylinder (1) replenishing gas into the conduit (18) through the pressure reducing valve (2).
3. The temperature control system according to claim 2, wherein the air pressure maintaining system further comprises a first solenoid valve (4), a second solenoid valve (6) and a digital pressure controller (3), the first solenoid valve (4) and the second solenoid valve (6) are respectively connected with the pipeline (18), and the first solenoid valve (4) and the second solenoid valve (6) are respectively electrically connected with the digital pressure controller (3);
when the pressure in the pipeline (18) is lower than the preset pressure, the digital pressure controller (3) controls the first electromagnetic valve (4) to be opened, and gas is supplemented into the pipeline (18) to increase the pressure in the pipeline (18); when the pressure in the pipeline (18) is higher than the preset pressure, the digital pressure controller (3) controls the second electromagnetic valve (6) to be opened, so that the pipeline (18) releases gas outwards to reduce the pressure in the pipeline (18).
4. A temperature control system according to claim 3, wherein the air pressure maintenance system further comprises a first needle valve (5), the first needle valve (5) being connected to the first solenoid valve (4), the first needle valve (5) being adapted to control the rate of pressurisation in the conduit (18).
5. A temperature control system according to claim 3, wherein the air pressure maintenance system further comprises a second needle valve (20), the second needle valve (20) being connected to the second solenoid valve (6), the second needle valve (20) being adapted to control the rate of pressure reduction in the conduit (18).
6. The temperature control system according to claim 1, wherein the temperature maintenance system further comprises a thermo thermocouple (11), the thermo thermocouple (11) being mounted inside the sample stage (14).
7. The temperature control system according to claim 6, wherein the temperature maintaining system further comprises a temperature control instrument (10), the temperature control instrument (10) is located outside the sealed cavity (13), and the heating assembly (9) and the temperature thermocouple (11) are respectively electrically connected with the temperature control instrument (10).
8. Temperature control system according to claim 1, characterized in that the first heat exchanger tubes (16) are heat exchanger spiral copper tubes.
9. The temperature control system according to claim 1, wherein the second heat exchange tube (12) is a heat exchange spiral copper tube.
10. Temperature control system according to claim 1, characterized in that the heating assembly (9) employs a heating resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221264823.1U CN217359294U (en) | 2022-05-24 | 2022-05-24 | Temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221264823.1U CN217359294U (en) | 2022-05-24 | 2022-05-24 | Temperature control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217359294U true CN217359294U (en) | 2022-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221264823.1U Active CN217359294U (en) | 2022-05-24 | 2022-05-24 | Temperature control system |
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| CN (1) | CN217359294U (en) |
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- 2022-05-24 CN CN202221264823.1U patent/CN217359294U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220930 Address after: No. 101, Building of Hi tech Entrepreneurship Service Center, Tongling Economic and Technological Development Zone, Anhui Province, 244000 Patentee after: ANHUI ZEYOU TECHNOLOGY CO.,LTD. Address before: 523000 room 402, building 12, No. 1 Xuefu Road, Songshanhu Park, Dongguan City, Guangdong Province Patentee before: Dongguan zhuoju Technology Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xu Zhiqiang Inventor after: Zhou Yong Inventor before: Xu Zhiqiang Inventor before: Xu Zhi Inventor before: Zhou Yong |
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| CB03 | Change of inventor or designer information | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230320 Address after: Building A1, innovation city, Songshanhu University, Dongguan, Guangdong 523000 Patentee after: Material Laboratory of Songshan Lake Patentee after: Dongguan zhuoju Technology Co.,Ltd. Address before: No. 101, Building of Hi tech Entrepreneurship Service Center, Tongling Economic and Technological Development Zone, Anhui Province, 244000 Patentee before: ANHUI ZEYOU TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |