Low-temperature experiment system

Abstract

The utility model relates to a low-temperature experiment system which comprises a low-temperature thermostatic bath, a reaction tank, a stainless steel coil pipe, a first water pipe, a second water pipe, a third water pipe, a circulating pump and a first power supply. When the circulating pump is started to work, liquid is driven to flow back to the reaction tank from the reaction tank to the third water pipe, the second water pipe, the stainless steel coil pipe, the first water pipe and then flow back to the reaction tank for circulating flow. Water in the reaction tank is pumped by the circulating pump, is subjected to heat exchange through the stainless steel coil pipe placed in the low-temperature constant-temperature tank to reduce the temperature, and then is discharged into the reaction tank through the water pipe connected to the stainless steel coil pipe, so that the reaction tank can provide a low-temperature experimental environment. The low-temperature thermostatic bath is used for adjusting the temperature of liquid in the reaction tank, so that the reaction tank can perform low-temperature treatment on an experimental sample, and the problems that a traditional low-temperature thermostatic bath is small in space and a traditional reaction tank cannot perform a low-temperature experiment are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to a low-temperature experimental system. Background Art

[0002] When conducting special experiments in a laboratory, a reaction tank such as a water bath constant temperature shaker is needed to oscillate experimental samples to achieve a uniform mixing effect. However, some experiments need to be carried out under low-temperature environmental conditions, while the temperature of the reaction tank can only be adjusted to room temperature and slightly higher temperatures, which cannot meet the requirements of low-temperature experiments. Therefore, a low-temperature constant temperature bath is required to enable the experiment to be carried out under a controllable low-temperature environmental temperature. However, the low-temperature constant temperature bath cannot achieve the oscillation and mixing of experimental samples, and its internal operation space is small, and it cannot meet the requirements of simultaneously processing multiple groups of experimental samples during the experiment. It can be seen that the traditional reaction tank and low-temperature constant temperature bath cannot meet the experimental requirements of simultaneously performing low-temperature treatment on multiple groups of experimental samples. Summary of the Utility Model

[0003] Based on this, in view of the problem that the traditional reaction tank and low-temperature constant temperature bath cannot meet the experimental requirements of simultaneously performing low-temperature treatment on multiple groups of experimental samples, it is necessary to provide a low-temperature experimental system, including a low-temperature constant temperature bath, a reaction tank, a stainless steel coil pipe, a first water pipe, a second water pipe, a third water pipe, a circulation pump, and a first power supply;

[0004] The stainless steel coil pipe is placed in the space surrounded by the tank wall of the low-temperature constant temperature bath. One end of the first water pipe is connected to the water outlet of the stainless steel coil pipe, and the other end is connected to the water inlet on the side wall of the reaction tank; one end of the second water pipe is connected to the water inlet of the stainless steel coil pipe, and the other end is connected to the water outlet of the circulation pump; one end of the third water pipe is connected to the water inlet of the circulation pump, and the other end is connected to the water outlet on the side wall of the reaction tank; the water inlet on the side wall of the reaction tank is far from the bottom wall of the reaction tank, and the water outlet on the side wall of the reaction tank is close to the bottom wall of the reaction tank;

[0005] The first power supply is electrically connected to the circulation pump. When the circulation pump starts to work, it drives the liquid to flow from the reaction tank, through the third water pipe, through the second water pipe, through the stainless steel coil pipe, through the first water pipe, and then back to the reaction tank for circulating flow.

[0006] In one embodiment, a temperature controller and a temperature sensor are further included;

[0007] The temperature sensing part of the temperature sensor is placed in the space surrounded by the tank wall of the low-temperature constant temperature bath; the circuit encapsulation part of the temperature controller penetrates through the tank wall of the low-temperature constant temperature bath and is electrically connected to the temperature controller;

[0008] The temperature controller is also electrically connected to the first power supply and the refrigerator of the low-temperature constant temperature bath.

[0009] In one embodiment, a relay is further included; the thermostat is electrically connected to the first power supply through the relay.

[0010] In one embodiment, a valve is further included, and the valve is arranged on the first water pipe.

[0011] In one embodiment, an electric valve, a fourth water pipe, a fifth water pipe and a second power supply are further included;

[0012] One end of the fourth water pipe is communicated with the water inlet of the reaction tank, and the other end is communicated with the water outlet of the electric valve; one end of the fifth water pipe is communicated with the water inlet of the electric valve, and the other end is used for communicating with the water supply device; the second power supply is electrically connected to the electric valve.

[0013] In one embodiment, a first liquid level probe, a second liquid level probe, a liquid level controller and a contactor are further included;

[0014] The probe parts of the first liquid level probe and the second liquid level probe are placed in the space surrounded by the tank wall of the reaction tank, and the circuit encapsulation parts of the first liquid level probe and the second liquid level probe penetrate through the side wall of the reaction tank and are electrically connected to the liquid level controller; the probe part of the first liquid level probe is close to the bottom wall of the reaction tank; the probe part of the second liquid level probe is far from the bottom wall of the reaction tank, and the distance of the probe part of the second liquid level probe relative to the bottom wall of the reaction tank is greater than the distance of the water inlet of the reaction tank relative to the bottom wall of the reaction tank.

[0015] In one embodiment, the first water pipe, the second water pipe and the third water pipe are all heat-insulating water pipes.

[0016] In one embodiment, the temperature sensor is a K-type temperature sensing wire

[0017] One of the above technical solutions has the following advantages and beneficial effects:

[0018] The low-temperature experimental system provided by the embodiments of the present application includes a low-temperature constant-temperature bath, a reaction tank, a stainless-steel coil pipe, a first water pipe, a second water pipe, a third water pipe, a circulation pump, and a first power supply. Among them, the stainless-steel coil pipe is placed in the space surrounded by the tank wall of the low-temperature constant-temperature bath. One end of the first water pipe is connected to the water outlet of the stainless-steel coil pipe, and the other end is connected to the water inlet on the side wall of the reaction tank. One end of the second water pipe is connected to the water inlet of the stainless-steel coil pipe, and the other end is connected to the water outlet of the circulation pump. One end of the third water pipe is connected to the water inlet of the circulation pump, and the other end is connected to the water outlet on the side wall of the reaction tank. The water inlet on the side wall of the reaction tank is far from the bottom wall of the reaction tank, and the water outlet on the side wall of the reaction tank is close to the bottom wall of the reaction tank. When the circulation pump starts to work, it drives the liquid to flow from the reaction tank, to the third water pipe, to the second water pipe, to the stainless-steel coil pipe, to the first water pipe, and then back to the reaction tank for circulating flow. The circulation pump extracts the water inside the reaction tank, conducts heat exchange through the stainless-steel coil pipe placed inside the low-temperature constant-temperature bath to reduce the temperature, and then discharges it into the reaction tank through the water pipe connected to the stainless-steel coil pipe, enabling the reaction tank to provide a low-temperature experimental environment. The present application uses the low-temperature constant-temperature bath to adjust the temperature of the liquid in the reaction tank, enabling the reaction tank to perform low-temperature treatment on experimental samples, solving the problems of small space in traditional low-temperature constant-temperature baths and the inability of traditional reaction tanks to conduct low-temperature experiments. In addition, the liquid in the reaction tank flows through the low-temperature constant-temperature bath through the steel coil pipe for heat exchange and cooling, realizing non-contact circulating cooling between the low-temperature constant-temperature bath and the reaction tank, and avoiding the problem of the liquid in the low-temperature constant-temperature bath directly entering the reaction tank and corroding the reaction tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Through the more specific description of the preferred embodiments of the present application shown in the drawings, the above-mentioned and other objects, features, and advantages of the present application will become clearer. The same reference numerals indicate the same parts in all the drawings, and the drawings are not deliberately drawn to scale in actual size, with the emphasis on showing the gist of the present application.

[0020] Figure 1 It is the first structural schematic diagram of the low-temperature experimental system in the embodiment of the present application.

[0021] Figure 2 It is the second structural schematic diagram of the low-temperature experimental system in the embodiment of the present application.

[0022] Figure 3 It is the third structural schematic diagram of the low-temperature experimental system in the embodiment of the present application.

[0023] Figure 4 It is the fourth structural schematic diagram of the low-temperature experimental system in the embodiment of the present application.

[0024] Description of the reference numerals:

[0025] 11. Low-temperature constant temperature bath; 13. Reaction tank; 15. Stainless steel coil pipe; 17. First water pipe; 19. Second water pipe; 21. Third water pipe; 23. Circulation pump; 25. First power supply; 27. Temperature controller; 29. Temperature sensor; 31. Relay; 33. Valve; 35. Electric valve; 37. Fourth water pipe; 39. Fifth water pipe; 41. Second power supply; 43. Water supply device; 45. First liquid level probe; 47. Second liquid level probe; 49. Liquid level controller; 51. Contactor. Detailed implementation mode

[0026] To facilitate the understanding of this application, the following will describe this application more comprehensively with reference to the relevant attached drawings. The preferred embodiments of this application are given in the attached drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0027] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to another element and integrated with it, or there may be an intermediate element at the same time. The terms "arranged", "one end", "the other end" and similar expressions used herein are only for the purpose of illustration.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] The temperature of reaction tanks such as water bath constant temperature shakers can only be adjusted to room temperature and slightly higher temperatures, and it is impossible to simulate a low-temperature environment. The low-temperature constant temperature bath cannot achieve the oscillating mixing of experimental samples, and the internal operation space is small, and it cannot meet the requirements of simultaneously processing multiple groups of experimental samples during experiments. Using either of them alone cannot meet the experimental requirements. It is necessary to use the low-temperature constant temperature bath in combination with reaction tanks such as water bath constant temperature shakers, and circulate and exchange the water inside the low-temperature constant temperature bath and the water inside the reaction tank. However, the low-temperature constant temperature bath has no external circulation device and cannot achieve liquid exchange. And considering that special solutions may be added to the low-temperature constant temperature bath, if the low-temperature constant temperature bath and the reaction tank are directly circulated and exchanged, it may corrode the low-temperature constant temperature bath or the reaction tank.

[0030] To solve the above problems, in one embodiment, as Figure 1As shown in the figure, a low-temperature experiment system is provided, which includes a low-temperature constant temperature bath 11, a reaction bath 13, a stainless-steel coil pipe 15, a first water pipe 17, a second water pipe 19, a third water pipe 21, a circulation pump 23, and a first power supply 25. Among them, the low-temperature constant temperature bath 11 can be used to lower the temperature of the liquid contained therein to perform low-temperature treatment on experimental samples. Specifically, the low-temperature constant temperature bath 11 includes a refrigerator, and the refrigerator performs heat exchange to lower the temperature of the liquid. The reaction bath 13 is used to perform water bath constant temperature treatment on experimental samples. The lowest temperature provided by the traditional reaction bath 13 is room temperature, and it cannot perform low-temperature treatment on experimental samples. The stainless-steel coil pipe 15, the first water pipe 17, the second water pipe 19, and the third water pipe 21 are used to transport the liquid. Among them, in one example, the first water pipe 17, the second water pipe 19, and the third water pipe 21 are all heat-insulating water pipes, so as to maintain the temperature of the liquid during the circulating transportation process and avoid the problem of temperature change of the liquid during transportation. The circulation pump 23 is used to provide power for the liquid to circulate. The circulation pump 23 sucks the liquid in the reaction bath 13, sends it into the second water pipe 19, flows into the stainless-steel coil pipe 15, and then flows back to the reaction bath 13 through the first water pipe.

[0031] Specific construction method of the low-temperature experiment system: The stainless-steel coil pipe 15 is placed in the space surrounded by the tank wall of the low-temperature constant temperature bath 11. One end of the first water pipe 17 is connected to the water outlet of the stainless-steel coil pipe 15, and the other end is connected to the water inlet on the side wall of the reaction bath 13. One end of the second water pipe 19 is connected to the water inlet of the stainless-steel coil pipe 15, and the other end is connected to the water outlet of the circulation pump 23. One end of the third water pipe 21 is connected to the water inlet of the circulation pump 23, and the other end is connected to the water outlet on the side wall of the reaction bath 13. The first power supply 25 is electrically connected to the circulation pump 23. When the circulation pump 23 starts to work, it drives the liquid to circulate from the reaction bath 13, through the third water pipe 21, to the second water pipe 19, to the stainless-steel coil pipe 15, to the first water pipe 17, and then back to the reaction bath 13.

[0032] Among them, the water inlet on the side wall of the reaction bath 13 is far from the bottom wall of the reaction bath 13, and the water outlet on the side wall of the reaction bath 13 is close to the bottom wall of the reaction bath 13. That is, when the reaction bath 13 is placed normally, the water inlet on the side wall of the reaction bath 13 is higher than the water outlet, which is conducive to the circulation of the liquid in the reaction bath 13 and the diffusion of the liquid temperature. Specifically, the newly flowing liquid into the reaction bath 13 quickly diffuses downward in the reaction bath 13 under the suction of the circulation pump 23. In addition, a fixed amount of water circulation can be realized, and the situation that the water inflow and outflow in the reaction bath 13 are not equal or the reaction bath 13 overflows will not occur. It should be noted that the stainless-steel coil pipe 15 is arranged closer to the bottom wall of the low-temperature constant temperature bath 11 to better perform heat exchange.

[0033] To prevent the waste of electric energy caused by the long-term operation of the circulation pump 23 and reduce the service life of the circulation pump 23, in one example, such as Figure 2As shown, it also includes a thermostat 27 and a temperature sensor 29. The temperature sensing part of the temperature sensor 29 is placed in the space enclosed by the tank wall of the low-temperature constant temperature bath 11; the circuit encapsulation part of the thermostat 27 penetrates through the tank wall of the low-temperature constant temperature bath 11 and is electrically connected to the thermostat 27; the thermostat 27 is also electrically connected to the first power supply 25 and the refrigerator of the low-temperature constant temperature bath 11. It should be noted that the temperature sensor 29 is used to collect the actual temperature of the low-temperature constant temperature bath 11. A standard experimental temperature is configured in the thermostat 27, and this standard experimental temperature is the target temperature that the low-temperature constant temperature bath 11 and the reaction tank 13 are expected to reach. When the actual temperature is less than or equal to the standard test temperature, the thermostat 27 controls the first power supply 25 to stop supplying power to the circulation pump 23. When the actual temperature is greater than the standard test temperature, the thermostat 27 controls the first power supply 25 to supply power to the circulation pump 23. Thus, it is avoided that the circulation pump 23 keeps working, the service life of the circulation pump 23 is prolonged, and it is also beneficial to save electric energy. In other words, the low-temperature constant temperature bath 11 is externally connected to a temperature control system, and by monitoring whether the water temperature inside the low-temperature constant temperature bath 11 reaches the target temperature, the automatic operation of the circulation pump 23 is controlled. It can not only prevent the waste of electric energy caused by the long-term operation of the circulation pump 23 but also increase the service life of the circulation pump 23. In one example, the temperature sensor 29 is a K-type temperature sensing wire.

[0034] To ensure the safety of the circuit, in one example, as Figure 2 shown, it also includes a relay 31; the thermostat 27 is electrically connected to the first power supply 25 through the relay 31. To control the amount of circulating liquid, in one example, as Figure 2 shown, it also includes a valve 33. The valve 33 is arranged on the first water pipe 17, and the amount of circulating liquid can be changed by adjusting the valve 33.

[0035] To facilitate loading liquid into the reaction tank 13, in one example, as Figure 3 shown, it also includes an electric valve 35, a fourth water pipe 37, a fifth water pipe 39, and a second power supply 41. One end of the fourth water pipe 37 communicates with the water inlet of the reaction tank 13, and the other end communicates with the water outlet of the electric valve 35; one end of the fifth water pipe 39 communicates with the water inlet of the electric valve 35, and the other end is used to communicate with the water supply device 43; the second power supply 41 is electrically connected to the electric valve 35. Specifically, the second power supply 41 supplies power to the electric valve 35, the electric valve 35 opens, and the water of the water supply device 43 flows into the reaction tank 13. The water supply device 43 can be tap water, and the other end of the fifth water pipe 39 is connected to a tap water faucet.

[0036] To avoid the consumption of water volume that may occur during the long-term operation of the reaction tank 13, which may affect the experiment or even cause a safety accident such as the reaction tank 13 burning dry. In one example, as Figure 4As shown in the figure, it also includes a first liquid level probe 45, a second liquid level probe 47, a liquid level controller 49, and a contactor 51. The probe parts of the first liquid level probe 45 and the second liquid level probe 47 are placed in the space enclosed by the tank wall of the reaction tank 13. The circuit encapsulation parts of the first liquid level probe 45 and the second liquid level probe 47 pass through the side wall of the reaction tank 13 and are electrically connected to the liquid level controller 49. The probe part of the first liquid level probe 45 is close to the bottom wall of the reaction tank 13. The probe part of the second liquid level probe 47 is far from the bottom wall of the reaction tank 13, and the distance of the probe part of the second liquid level probe 47 relative to the bottom wall of the reaction tank 13 is greater than the distance of the water inlet of the reaction tank 13 relative to the bottom wall of the reaction tank 13. The liquid level controller receives the water level change signal, is electrically connected to the contactor 51, and realizes automatic water inlet through the electric valve 35. When the water level reaches the position of the second liquid level probe 47, the liquid level controller receives the water level change signal again, disconnects the contactor 51, and the second power supply 41 stops supplying power to the electric valve 35, and the electric valve 35 stops water inlet. When the electric valve 35 is powered on, the internal motor rotates and opens the valve of the electric valve 35. When powered off, the motor stops rotating and the valve of the electric valve 35 closes.

[0037] The water level change of the reaction tank 13 is detected by the liquid level probe. If the water level of the reaction tank 13 is too low (the liquid level reaches the position of the first liquid level probe 45), the liquid level controller sends a signal, the contactor 51 closes, the second power supply 41 supplies power to the electric valve 35, the electric valve 35 starts, and through the water inlet at the bottom of the reaction tank 13, the water level of the reaction tank 13 is replenished to the original water level line. When the water level of the reaction tank 13 reaches the original water level line (the liquid level reaches the position of the second liquid level probe 47), the contactor 51 closes, the second power supply 41 stops supplying power to the electric valve 35, the electric valve 35 closes, and the water outlet pipe stops water inlet, realizing the automatic control of the water level of the reaction tank 13, thus avoiding safety accidents caused by the reaction tank 13 being dried out and also avoiding the water level of the reaction tank 13 being too high and overflowing the reaction tank 13.

[0038] In each embodiment of the low-temperature experiment system of the present application, it includes a low-temperature constant-temperature bath 11, a reaction tank 13, a stainless-steel coil 15, a first water pipe 17, a second water pipe 19, a third water pipe 21, a circulation pump 23, and a first power supply 25. Among them, the stainless-steel coil 15 is placed in the space surrounded by the tank wall of the low-temperature constant-temperature bath 11. One end of the first water pipe 17 is connected to the water outlet of the stainless-steel coil 15, and the other end is connected to the water inlet on the side wall of the reaction tank 13; one end of the second water pipe 19 is connected to the water inlet of the stainless-steel coil 15, and the other end is connected to the water outlet of the circulation pump 23; one end of the third water pipe 21 is connected to the water inlet of the circulation pump 23, and the other end is connected to the water outlet on the side wall of the reaction tank 13; the water inlet on the side wall of the reaction tank 13 is far from the bottom wall of the reaction tank 13, and the water outlet on the side wall of the reaction tank 13 is close to the bottom wall of the reaction tank 13. When the circulation pump 23 starts to work, it drives the liquid to flow from the reaction tank 13, to the third water pipe 21, to the second water pipe 19, to the stainless-steel coil 15, to the first water pipe 17, and then back to the reaction tank 13 for circulating flow. The circulation pump 23 extracts the water inside the reaction tank 13, conducts heat exchange through the stainless-steel coil 15 placed inside the low-temperature constant-temperature bath 11 to reduce the temperature, and then discharges it into the reaction tank 13 through the water pipe connected to the stainless-steel coil 15, enabling the reaction tank 13 to provide a low-temperature experiment environment. The present application uses the low-temperature constant-temperature bath 11 to adjust the temperature of the liquid in the reaction tank 13, so that the reaction tank 13 can perform low-temperature treatment on experimental samples, solving the problems of the small space of the traditional low-temperature constant-temperature bath 11 and the inability of the traditional reaction tank 13 to conduct low-temperature experiments. In addition, the liquid in the reaction tank 13 flows through the low-temperature constant-temperature bath 11 through the steel coil for heat exchange and cooling, realizing non-contact circulating cooling between the low-temperature constant-temperature bath 11 and the reaction tank 13, and avoiding the problem that the liquid in the low-temperature constant-temperature bath 11 directly enters the reaction tank 13 and corrodes the reaction tank 13.

[0039] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0040] The above embodiments only express several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A low temperature experimental system, characterized in that: It includes a low-temperature constant temperature tank, a reaction tank, a stainless steel coil, a first water pipe, a second water pipe, a third water pipe, a circulation pump and a first power supply; The stainless steel coil is placed in the space surrounded by the tank wall of the low-temperature constant temperature tank, one end of the first water pipe is connected to the water outlet of the stainless steel coil, and the other end is connected to the water inlet on the side wall of the reaction tank; one end of the second water pipe is connected to the water inlet of the stainless steel coil, and the other end is connected to the water outlet of the circulation pump; one end of the third water pipe is connected to the water inlet of the circulation pump, and the other end is connected to the water outlet on the side wall of the reaction tank; the water inlet on the side wall of the reaction tank is far away from the bottom wall of the reaction tank, and the water outlet on the side wall of the reaction tank is close to the bottom wall of the reaction tank; The first power supply is electrically connected to the circulation pump. When the circulation pump starts working, it drives the liquid from the reaction tank to the third water pipe, to the second water pipe, to the stainless steel coil, to the first water pipe, and then back to the reaction tank for circulation.

2. The low temperature experiment system according to claim 1, characterized in that: Also includes thermostat and temperature sensor The temperature sensing part of the temperature sensor is placed in the space surrounded by the wall of the low-temperature thermostatic bath; the circuit packaging part of the temperature controller is passed through the wall of the low-temperature thermostatic bath and is electrically connected to the temperature controller; The temperature controller is also electrically connected to the first power source and the refrigerator of the low-temperature constant temperature bath.

3. The low temperature experiment system according to claim 2, characterized in that: It also includes a relay; the temperature controller is electrically connected to the first power supply through the relay.

4. The low temperature experiment system according to claim 1, characterized in that: It also includes a valve, which is arranged on the first water pipe.

5. The low temperature experiment system according to any one of claims 1 to 4, characterized in that: Also includes an electric valve, a fourth water pipe, a fifth water pipe and a second power supply; One end of the fourth water pipe is connected to the water filling port of the reaction tank, and the other end is connected to the water outlet of the electric valve; one end of the fifth water pipe is connected to the water inlet of the electric valve, and the other end is used to connect to the water supply device; The second power source is electrically connected to the electric valve.

6. The low temperature experiment system according to claim 5, characterized in that: It also includes a first liquid level probe, a second liquid level probe, a liquid level controller and a contactor; The probe parts of the first liquid level probe and the second liquid level probe are placed in the space surrounded by the tank wall of the reaction tank, and the circuit packaging parts of the first liquid level probe and the second liquid level probe are penetrated through the side wall of the reaction tank and are electrically connected to the liquid level controller; the probe part of the first liquid level probe is close to the bottom wall of the reaction tank; the probe part of the second liquid level probe is far away from the bottom wall of the reaction tank, and the distance between the probe part of the second liquid level probe and the bottom wall of the reaction tank is greater than the distance between the water inlet of the reaction tank and the bottom wall of the reaction tank.

7. The low temperature experiment system according to any one of claims 1 to 4, characterized in that: The first water pipe, the second water pipe and the third water pipe are all heat-insulating water pipes.

8. The low temperature experiment system according to claim 2 or 3, characterized in that: The temperature sensor is a K-type temperature sensing wire.

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