Temperature control system based on external circulation of bath lotion

Abstract

The utility model relates to the technical field of low-temperature refrigeration, in particular to a temperature control system based on bath lotion external circulation, which comprises a refrigerator and a thermostatic bath. A refrigerator bath lotion inlet and a refrigerator bath lotion outlet are formed in one side of the refrigerator, and the refrigerator bath lotion inlet is connected with a thermostatic bath bath lotion outlet formed in one side of the thermostatic bath through a pipeline; the refrigerator bath lotion outlet is connected with a thermostatic bath bath lotion inlet formed in one side of the thermostatic bath through a pipeline. In the design aspect of the thermostatic bath, the bath lotion return port is additionally arranged, so that the liquid level can be kept stable for a long time; meanwhile, the inner layer and the outer layer are arranged, and the heat preservation effect is improved through heat preservation material filling, vacuumizing and other modes.

Description

Technical Field

[0001] The utility model relates to the technical field of cryogenic refrigeration, and relates to a temperature control system based on external circulation of bath liquid. Background Art

[0002] In research fields such as petroleum, chemical industry, chemistry, bioengineering, medicine and health, life science, light industry and food, physical property testing and chemical analysis, low temperature conditions are often required in experiments. For example, basic data such as the density, viscosity, and heat capacity of fluids are measured under low temperature conditions; in the process of solvent development in the field of gas purification, the gas-liquid phase equilibrium data of gas and solvent at low temperature are measured; in experiments with high-temperature decomposable substances as catalysts, a low-temperature environment for the reaction needs to be maintained to ensure the normal progress of the experiment. It can be seen that cryogenic refrigeration systems are widely used in scientific research experiments in various industries.

[0003] Observing the current refrigeration equipment, it is often a refrigerator with a bath liquid pool. During experiments, the system to be refrigerated is immersed in the bath liquid in the refrigerator bath. This method has the following disadvantages: ① The size of the experimental container to be refrigerated is limited by the size and shape of the refrigerator bath; ② When the refrigeration system needs to be strictly sealed and connected with pipelines, affected by multiple factors such as the size of the refrigerator bath and the external dimensions of the refrigerator, it is very difficult for the experimental device to be directly matched with the refrigerator; ③ The flow path of the bath liquid in most constant temperature baths is through the jacket, and the heat transfer efficiency is low. Summary of the Utility Model

[0004] The utility model provides the following to solve the above-mentioned defects and deficiencies existing in the prior art.

[0005] To solve the above technical problems, the utility model provides a temperature control system based on external circulation of bath liquid, including a refrigerator and a constant temperature bath;

[0006] A refrigerator bath liquid inlet and a refrigerator bath liquid outlet are arranged on one side of the refrigerator. The refrigerator bath liquid inlet is connected to the constant temperature bath liquid outlet arranged on one side of the constant temperature bath through a pipeline; the refrigerator bath liquid outlet is connected to the constant temperature bath liquid inlet arranged on one side of the constant temperature bath through a pipeline.

[0007] Preferably, magnetic stirrers are arranged inside both the refrigerator and the constant temperature bath.

[0008] Preferably, a bracket and a refrigerator parameter setting panel are further arranged on the upper end of the refrigerator.

[0009] Preferably, a bath liquid flow control valve is arranged on the pipeline connecting the refrigerator bath liquid outlet and the constant temperature bath liquid inlet.

[0010] Preferably, a constant temperature bath liquid overflow port is arranged on the upper end of one side of the constant temperature bath; the pipeline connected to the constant temperature bath liquid overflow port penetrates through the upper end of the refrigerator and the pipeline port is located above the magnetic stirrer.

[0011] Preferably, the position of the overflow port of the constant temperature bath solution is higher than the position penetrated by the pipeline on the refrigerator in the horizontal direction.

[0012] Preferably, a magnetic stirrer is provided at the bottom of the constant temperature bath; a bath solution temperature measuring probe is provided above the stirrer inside the constant temperature bath; a bath solution temperature display liquid crystal screen is provided on one side of the constant temperature bath; a bath solution discharge port is provided at the position tangent to the bottom of the constant temperature bath on the other side.

[0013] Preferably, the constant temperature bath is provided with a sandwich layer, and a vacuum pumping joint for the constant temperature bath sandwich layer is provided on one side of the constant temperature bath, and the vacuum pumping joint for the constant temperature bath sandwich layer is connected to a vacuum pump.

[0014] Preferably, a constant temperature bath cover plate is provided at the upper end of the constant temperature bath.

[0015] The beneficial technical effects achieved by the present utility model:

[0016] (1) A temperature control system based on external circulation of bath solution of the present utility model has good refrigeration effect, accurate temperature control and simple structure.

[0017] (2) The constant temperature bath in the temperature control system based on external circulation of bath solution of the present utility model is different from the jacket type design of most external circulation refrigeration, allowing the bath solution to directly contact the part to be refrigerated, greatly improving the refrigeration efficiency, shortening the cooling time required for the experiment, and at the same time reducing the fluctuation of the refrigeration temperature.

[0018] (3) A temperature control system based on external circulation of bath solution of the present utility model, in terms of the design of the constant temperature bath, adds a bath solution return port to ensure the stability of the liquid level for a long time; at the same time, it is provided with two inner and outer layers, and the heat preservation effect is improved by filling heat preservation materials, vacuum pumping, etc. Description of the Drawings

[0019] Figure 1 is a schematic diagram of a temperature control system based on external circulation of bath solution of the present utility model;

[0020] Figure 2 is a schematic diagram of the stirrer in the temperature control system based on external circulation of bath solution of the present utility model.

[0021] Among them, 1. Stirrer; 2. Refrigerator; 3. Bracket; 4. Refrigerator parameter setting panel; 5. Refrigerator bath solution inlet; 6. Refrigerator bath solution outlet; 7. Constant temperature bath solution overflow port; 8. Bath solution flow control valve; 9. Constant temperature bath cover plate; 10. Magnetic stirrer; 11. Bath solution temperature measuring probe; 12. Bath solution temperature display liquid crystal screen; 13. Bath solution discharge port; 14. Vacuum pumping joint for constant temperature bath sandwich layer; 15. Constant temperature bath; 16. Constant temperature bath bath solution inlet; 17. Constant temperature bath bath solution outlet. Detailed Implementation Modes

[0022] The present invention will be further described below in conjunction with specific embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and cannot be used to limit the protection scope of the present invention.

[0023] The following will further illustrate the utility model patent in conjunction with Figure 1 drawings Figure 2 and embodiments.

[0024] A temperature control system based on the external circulation of bath liquid includes a refrigerator 2 and a constant temperature bath 15;

[0025] On one side of the refrigerator 2, there are a refrigerator bath liquid inlet 5 and a refrigerator bath liquid outlet 6. The refrigerator bath liquid inlet 5 is connected to the constant temperature bath liquid outlet 17 provided on one side of the constant temperature bath 15 through a pipeline; the refrigerator bath liquid outlet 6 is connected to the constant temperature bath liquid inlet 16 provided on one side of the constant temperature bath 15 through a pipeline.

[0026] Stirring bars 1 are provided inside both the refrigerator 2 and the constant temperature bath 15.

[0027] On the upper end of the refrigerator 2, there are also a bracket 3 and a refrigerator parameter setting panel 4.

[0028] A bath liquid flow control valve 8 is provided on the pipeline connecting the refrigerator bath liquid outlet 6 and the constant temperature bath liquid inlet 16.

[0029] On the upper end of one side of the constant temperature bath 15, there is a constant temperature bath liquid overflow port 7; the pipeline connected to the constant temperature bath liquid overflow port 7 penetrates through the upper end of the refrigerator 2 and the pipeline port is located above the stirring bar 1.

[0030] The position of the constant temperature bath liquid overflow port 7 is higher than the position where the pipeline penetrates through the refrigerator 2 in the horizontal direction.

[0031] A magnetic stirrer 10 is provided at the bottom of the constant temperature bath 15; a bath liquid temperature measuring probe 11 is provided above the stirring bar 1 inside the constant temperature bath 15; a bath liquid temperature display liquid crystal screen 12 is provided on one side of the constant temperature bath 15; a bath liquid discharge port 13 is provided at the position where the other side of the constant temperature bath 15 is tangent to the bottom of the constant temperature bath 15.

[0032] The constant temperature bath 15 is provided with a sandwich layer, and a constant temperature bath sandwich vacuum joint 14 is provided on one side of the constant temperature bath 15. The constant temperature bath sandwich vacuum joint 14 is connected to a vacuum pump.

[0033] A constant temperature bath cover 9 is provided on the upper end of the constant temperature bath 15.

[0034] The temperature control range of the refrigeration system in this embodiment is -80 ~ 100 ℃; the bath tank volume of the refrigerator 2 is 10 ~ 20 L, and the outside is wrapped with a 3~5 cm thick insulation medium; the system can be intelligently controlled by point-to-point heating, and the temperature control accuracy is ± 0.1 ℃. The refrigerator 2 is provided with a stirring function, and the bottom prevents the stirring bar 1, which can help the bath temperature in the bath to be evenly distributed; the bottom of the bath is connected to a low-temperature circulation pump; the refrigerator bath inlet 5 and the refrigerator bath outlet 6 on the side of the refrigerator 2 are respectively connected to the constant temperature bath bath outlet 17 and the constant temperature bath bath inlet 16.

[0035] The volume of the thermostatic bath 15 is 5 to 10 L, and it is a double-layer structure. The interval between the inner layer and the outer layer is 2 to 3 cm, and the interlayer space is filled with insulation material; the height difference between the thermostatic bath bath inlet 16 and the thermostatic bath bath outlet 17 is 10 to 15 cm, and a two-point internal wire welding piece is used to connect the inner and outer layers of the thermostatic bath by welding; the thermostatic bath 15 is provided with a thermostatic bath bath overflow port 7 at a distance of 10 to 20 cm from the top, and the thermostatic bath bath overflow port 7 is higher than the thermostatic bath bath inlet 16 and the thermostatic bath bath outlet 17, and is used to ensure the stability of the liquid level during the experiment; the thermostatic bath interlayer vacuum joint 14 is provided in the interlayer space of the thermostatic bath 15 and is connected to the vacuum pump. During the experiment, the interlayer of the thermostatic bath 15 is evacuated to a vacuum state, thereby improving the thermal insulation effect of the thermostatic bath 15 and reducing cold loss. In order to make the bath temperature in the thermostatic bath 15 evenly distributed, a magnetic stirrer 10 is placed at the bottom, and its rotating speed can be adjusted in the interval of 0 ~ 200 r / min. The thermostatic bath 15 is provided with a bath outlet 13, which is tangent to the bottom of the thermostatic bath. After the experiment is completed, the bath can be directly discharged and stored reasonably. The thermostatic bath 15 is provided with a bath temperature display LCD screen 12, and a bath temperature temperature measuring probe 11 is located at 1 / 3 ~ 2 / 3 of the bath liquid level and the bottom of the thermostatic bath, for monitoring the bath temperature changes in the experiment. The bath renewal speed in the thermostatic bath 15 is 10 ~ 20 L / min, and the bath renewal speed can be adjusted by adjusting the bath flow control valve 8 opening and closing degree of the pipeline between the refrigerator 2 and the thermostatic bath.

[0036] The outside of the bath of the refrigerator 2 uses a rubber-plastic insulation board as a heat-insulating medium.

[0037] Refrigerator 2 selects anhydrous ethanol as the bath liquid.

[0038] A needle valve capable of accurately adjusting the valve opening is used at the bath liquid outlet 6 of the refrigerator, and the valve can be used to adjust the flow rate of the bath liquid outlet.

[0039] The interface between the pipeline and the constant temperature bath uses a two-part internal thread welding joint, and the length of the welding joint must be greater than the spacing between the inner and outer layers of the constant temperature bath; the connection between the welding joint and the pipeline uses a two-part external thread pagoda head, and the size corresponds to the bath liquid circulation pipeline.

[0040] The constant temperature bath 15 is made of 304 stainless steel with a thickness of about 3 - 5 mm, ensuring the strength of the bath body and being not easily deformed after vacuum pumping.

[0041] An LCD screen for displaying the bath liquid temperature is provided outside the constant temperature bath 15, which is used to detect the temperature of the bath liquid in the bath in a timely manner.

[0042] The size of the constant temperature bath 15 can be adjusted according to the experimental requirements.

[0043] The above technical solution is only one feasible technology of the present utility model, and those skilled in the art can reasonably adjust the specific design according to actual needs.

[0044] Before use, first determine whether the valves between the refrigerator 2 and the constant temperature bath 15 are closed. The valves mainly include the valves at the bath liquid outlet 6 and the bath liquid inlet 5 of the refrigerator and the bath liquid flow control valve 8. It is necessary to confirm that the valves are in the closed state before and after the experiment to prevent the bath liquid from flowing into the refrigerator 2 under the action of gravity when the low-temperature circulation pump of the refrigerator is not started. Then add an appropriate amount of bath liquid to the refrigerator bath and the constant temperature bath 15, and the selection of the bath liquid depends on the temperature required during the experiment.

[0045] Place the required refrigeration part in the constant temperature bath. Turn on the circulation pump switch on the parameter setting panel 4 of the refrigerator, control the valves at the bath liquid outlet and the bath liquid inlet of the refrigerator to be fully open, open the bath liquid flow control valve 8 of the refrigerator, wait until the bath liquid level in the constant temperature bath 15 reaches the bath liquid overflow port 7 of the constant temperature bath, then open the valve at the bath liquid inlet 6 of the refrigerator, and then adjust the bath liquid flow control valve 8 of the refrigerator to keep the bath liquid level constant.

[0046] Adjust the temperature to be refrigerated through the parameter setting panel 4 of the refrigerator and wait for the cooling to be completed. During the cooling period, as the temperature of the bath liquid slowly drops, the viscosity of the bath liquid increases slightly, and when the pump runs stably, the liquid level will rise slightly. After the cooling is completed, slightly adjust the bath liquid flow control valve 8 of the refrigerator to make the bath liquid level in the constant temperature bath drop to an appropriate height.

[0047] After the experiment is completed, close the valves in the above process, and let the bath liquid drain out through the bath liquid drain port 13 of the constant temperature bath and store it properly.

[0048] The present utility model has been published with a preferred embodiment, but it is not intended to limit the present utility model. All technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present utility model.

Claims

1. A temperature control system based on external circulation of bath liquid, characterized in that: It includes a refrigerator (2) and a constant temperature bath (15); A refrigerator bath liquid inlet (5) and a refrigerator bath liquid outlet (6) are provided on one side of the refrigerator (2); the refrigerator bath liquid inlet (5) is connected to a thermostatic bath bath liquid outlet (17) provided on one side of the thermostatic bath (15) via a pipeline; and the refrigerator bath liquid outlet (6) is connected to a thermostatic bath bath liquid inlet (16) provided on one side of the thermostatic bath (15) via a pipeline.

2. A temperature control system based on external circulation of bath liquid according to claim 1, characterized in that: A stirrer (1) is provided inside the refrigerator (2) and the constant temperature bath (15).

3. A temperature control system based on external circulation of bath liquid according to claim 1, characterized in that: The upper end of the refrigerator (2) is also provided with a bracket (3) and a refrigerator parameter setting panel (4).

4. A temperature control system based on external circulation of bath liquid according to claim 2, characterized in that: A bath liquid flow control valve (8) is provided on the pipeline connecting the bath liquid outlet (6) of the refrigerator and the bath liquid inlet (16) of the thermostatic bath.

5. A temperature control system based on external circulation of bath liquid according to claim 4, characterized in that: A thermostatic bath bath liquid overflow port (7) is provided at the upper end of one side of the thermostatic bath (15); a pipeline connected to the thermostatic bath bath liquid overflow port (7) passes through the upper end of the refrigerator (2), and the pipeline port is located above the stirrer (1).

6. A temperature control system based on external circulation of bath liquid according to claim 5, characterized in that: The position of the thermostatic bath bath liquid overflow port (7) is higher in the horizontal direction than the position on the refrigerator (2) where the pipe penetrates.

7. A temperature control system based on external circulation of bath liquid according to claim 1, characterized in that: A magnetic stirrer (10) is arranged at the bottom of the thermostatic bath (15); a bath liquid temperature measuring probe (11) is arranged above the stirrer (1) inside the thermostatic bath (15); a bath liquid temperature display LCD (12) is arranged on one side of the thermostatic bath (15); and a bath liquid discharge outlet (13) is arranged on the other side of the thermostatic bath (15) at a position tangent to the bottom of the thermostatic bath (15).

8. A temperature control system based on external circulation of bath liquid according to claim 5, characterized in that: The thermostatic bath (15) is provided with an interlayer, and a thermostatic bath interlayer vacuum joint (14) is provided on one side of the thermostatic bath (15), and the thermostatic bath interlayer vacuum joint (14) is connected to a vacuum pump.

9. A temperature control system based on external circulation of bath liquid according to claim 1, characterized in that: A thermostatic bath cover plate (9) is provided at the upper end of the thermostatic bath (15).

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