Constant-temperature incubator for biological experiment

Abstract

The utility model relates to the technical field of biological experiment equipment, in particular to a constant-temperature incubator for biological experiments, which comprises a shell and an inner container positioned in the shell, a water jacket is formed between the inner container and the shell, an electric heating piece is arranged in the water jacket, a circulating pump is arranged on the outer top wall of the shell, and the circulating pump is communicated with the inner container. The pumping-in end of the circulating pump communicates with a water pumping pipe, the pumping-out end of the circulating pump communicates with a water conveying pipe, the end, away from the circulating pump, of the water pumping pipe extends to the top in the water jacket, and the end, away from the circulating pump, of the water conveying pipe extends to the bottom in the water jacket. The constant-temperature incubator disclosed by the utility model can solve the problem of non-uniform temperature distribution in the incubator body.

Description

TECHNICAL FIELD

[0001] The utility model relates to biological experiment equipment technical field, concretely relates to a constant temperature incubator for biological experiment. BACKGROUND

[0002] Constant temperature incubator, simply called incubator, is a general term for constant temperature cavity. It is widely used in medical and health, pharmaceutical industry, biochemistry, industrial production and agricultural science, etc. scientific research departments, and its main function is to cultivate various microorganisms or tissues, cells and other organisms, and it is an important equipment for cultivating microorganisms, tissues and cells.

[0003] The temperature control mode of constant temperature incubator mainly includes two kinds, one is metal sheet type. That is, a metal sheet with a large thermal expansion coefficient is made into a spiral shape. One end of the metal sheet is fixed on the inner wall of the box chamber, and the other end is provided with a movable contact. At room temperature, the two contacts are closed. After the power is turned on, the temperature in the box chamber rises, the metal sheet fixed here expands due to heat, the bending degree changes, the contact at the other end moves away, the circuit is cut off, the heating stops, and the temperature drops. To a certain extent, the spiral metal sheet returns to its original state, the two contacts are in contact again, the circuit is turned on, and the heating starts. In this way, the circuit is turned on and off, and the temperature in the box is kept constant. The other is computer intelligent control type, which mostly uses microcomputer PID controller as control unit, thermal element as thermometer, digital display set value and measured value, which constitutes a complete control system. The measured temperature is obtained from the thermometer of the system, the controller makes a decision, and an output device is used to respond. The controller obtains the measurement result from the thermometer, then subtracts the measurement result from the set result to obtain the error, and finally calculates a correction value for the system as the input result. In this way, the system can eliminate errors from its output results to ensure the stability of the temperature in the box.

[0004] The constant temperature incubator usually includes a vertical box body, the side wall of the box body is provided with an opening, and the side wall opening of the box body is provided with a sealing ring. The sealing ring is arranged on the closing door or the box body. When the closing door is closed, the box body can be closed. The box body is internally provided with a stainless steel partition plate for supporting the culture, and the box body is further provided with a heating structure. Among them, the water jacket type constant temperature incubator is heated by the liquid layer wrapped outside, and then the inside is heated. The temperature rises slowly, but the internal temperature can be maintained constant for a long time in the case of power failure, and the stable culture of the sample is maintained.

[0005] For the water jacket type thermostat incubator, the cabinet includes a shell and an inner container, the inner container is located inside the shell, and a water jacket structure is formed between the inner container and the shell, the water jacket is used for storing water, an electric heating element is further arranged in the water jacket, the electric heating element is used for heating the water in the water jacket, the water in the water jacket further heats the inner container, and the inner container further heats the culture in the inner container. However, the water temperature of the part close to the electric heating element and the part with high water level in the water jacket is relatively high, which leads to the uneven temperature distribution of the water in the water jacket, and further leads to the inconsistent temperature of each part of the inner container. The inconsistent temperature of each part of the inner container leads to the inconsistent heat radiation of each part, and further leads to the uneven heating of the culture in the inner container, which easily interferes with the accuracy of biological experiments. Practical new type content

[0006] The utility model discloses a thermostat incubator for biological experiment aims at improving the problem that the water jacket type thermostat incubator in the prior art is easy to interfere with the accuracy of biological experiments due to the uneven internal water temperature distribution.

[0007] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A thermostat incubator for biological experiment, including shell and the inner container of being located in the shell interior, the inner container with shell forms water jacket, be provided with electric heating element in the water jacket, the outer top wall of shell is provided with circulating pump, the pump import of circulating pump is communicated and is provided with the water suction pipe, and the pump export is communicated and is provided with the water delivery pipe, the water suction pipe is away from the one end of circulating pump and extends to the top of water jacket interior, and the water delivery pipe is away from the one end of circulating pump and extends to the bottom of water jacket interior.

[0009] Further, the water jacket top extends to the directly above of the inner container, and the bottom extends to the directly below of the inner container.

[0010] Further, a plurality of water delivery holes are arranged on the water delivery pipe along the length direction of the water delivery pipe.

[0011] Further, the pump export of circulating pump is communicated and is provided with a plurality of water delivery pipes, and the back side and both side walls of shell are distributed with water delivery pipes at the corresponding positions, and the one end of a plurality of water delivery pipes away from circulating pump extends to the bottom of water jacket.

[0012] Further, the water inlet pipe and the water outlet pipe are arranged on the shell, the water inlet pipe is communicated with the top of water jacket, the water outlet pipe is communicated with the bottom of water jacket, the water inlet valve is arranged on the water inlet pipe, and the water outlet valve is arranged on the water outlet pipe.

[0013] Further, the overflow pipe is arranged on the shell, the overflow pipe is communicated with the top of water jacket, the overflow valve is arranged on the overflow pipe, and the water outlet end height of overflow pipe is higher than the water inlet end height of water suction pipe.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] In the utility model, water is used for storing in the water jacket, when biological experiments are carried out using the water jacket type constant temperature incubator, the water in the water jacket is heated through the electric heating element, after the water in the water jacket is heated, the water in the water jacket will slowly cool down, because the structure of each part of the water jacket is different, leading to the efficiency of heat transfer of each part of the water jacket being different, and further leading to the temperature of different parts of the water in the water jacket not being completely consistent, the water with higher temperature will rise to the top of the water jacket, and the water with lower temperature will descend to the bottom of the water jacket, so that the water in the water jacket has the problem of uneven temperature distribution, at this time, the circulating pump can be started, the circulating pump transports the water with higher temperature at the top of the water jacket to the bottom of the water jacket through the water suction pipe and the water delivery pipe, so that the hot water at the bottom of the water jacket mixes with the cold water uniformly, which is beneficial to improving the water temperature of the water at the lower part of the water jacket to a certain extent, reducing the temperature difference in the water jacket, making the water temperature distribution in the water jacket more uniform, and further making the temperature of each part of the inner container more close, and further reducing the case that the biological experiment accuracy is reduced due to uneven temperature distribution in the inner container. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model, and in the drawings:

[0017] Figure 1 It is the structural schematic diagram of the utility model;

[0018] Figure 2 It is the partial sectional view of the utility model.

[0019] Markings in the drawings and corresponding names of parts:

[0020] 1, shell;2, inner container;3, circulating pump;4, water suction pipe;5, water delivery pipe;6, water delivery hole;7, water inlet pipe;8, water outlet pipe;9, water inlet valve;10, water outlet valve;11, overflow pipe;12, overflow valve. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be apparently and completely described below in combination with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Embodiment 1

[0023] The utility model relates to a constant temperature incubator for biological experiment, refer to Figure 1 、 Figure 2 , including shell 1 and the inner container 2 in the inside of shell 1, and the inner container 2 is formed with water jacket between shell 1, is provided with electric heating element in water jacket, and the outer top wall of shell 1 is provided with circulating pump 3, and the pump inlet of circulating pump 3 is communicated with the water suction pipe 4, and the pump outlet is communicated with the water delivery pipe 5, and the one end of water suction pipe 4 away from circulating pump 3 extends to the top inside water jacket, and the one end of water delivery pipe 5 away from circulating pump 3 extends to the bottom inside water jacket.Electric heating element can use electric heating tube (electric heating tube is not shown in the drawing).

[0024] In the scheme, water is stored in the water jacket, and when the water jacket type constant temperature incubator is used for biological experiment, the water in the water jacket is heated by the electric heating element, and after the water in the water jacket is heated, the water in the water jacket will slowly cool down, due to the difference in structure of each part of the water jacket, the efficiency of heat transfer of each part of the water jacket is different, and then the temperature of different parts of the water in the water jacket is not completely consistent, the water with higher temperature rises to the top of the water jacket, and the water with lower temperature falls to the bottom of the water jacket, so that the temperature distribution of the water in the water jacket is not uniform, at this time, the circulating pump 3 can be started, and the circulating pump 3 sends the water with higher temperature at the top of the water jacket to the bottom of the water jacket through the water suction pipe 4 and the water delivery pipe 5, so that the hot water at the bottom of the water jacket is mixed with the cold water uniformly, which is beneficial to improve the water temperature of the lower part of the water jacket to a certain extent, reduce the temperature difference in the water jacket, make the water temperature distribution in the water jacket more uniform, and then make the temperature of each part of the inner container 2 more close, and then reduce the case that the biological experiment accuracy is reduced due to the uneven temperature distribution in the inner container 2.

[0025] Further, the top of the water jacket extends to directly above the inner container 2, and the bottom extends to directly below the inner container 2. It is convenient to heat the top wall and the bottom wall of the inner container 2 by water bath through the water jacket, so that the inner container 2 can heat the culture in the interior through the five surfaces, which is beneficial to improve the heating efficiency and make the culture heated more uniformly.

[0026] Embodiment 2

[0027] On the basis of embodiment 1, in the embodiment, referring to Figure 1 、 Figure 2 , a plurality of water delivery holes 6 are arranged on the water delivery pipe 5 along the length direction of the water delivery pipe 5.

[0028] In the scheme, in the process that the circulating pump 3 sends the water with higher temperature above the water jacket to the lower part of the water jacket, the water with higher temperature in the water delivery pipe 5 can flow to different depths of the water jacket through the plurality of water delivery holes 6, which is convenient to mix the water with higher temperature with the water at different depths of the water jacket, so that the water temperature distribution in the water jacket is more uniform.

[0029] Furthermore, the pump outlet of the circulation pump 3 is connected to multiple water supply pipes 5. Water supply pipes 5 are distributed on the back side and the corresponding positions of the two side walls of the outer shell 1. The ends of the multiple water supply pipes 5 that are away from the circulation pump 3 extend to the bottom of the water jacket, so that the water inside the inner tank 2 can be mixed more thoroughly.

[0030] Example 3

[0031] Based on Example 1, in this example, refer to Figure 1 , Figure 2 The outer casing 1 is equipped with an inlet pipe 7 and an outlet pipe 8. The inlet pipe 7 is connected to the top of the water jacket, and the outlet pipe 8 is connected to the bottom of the water jacket. The inlet pipe 7 is equipped with an inlet valve 9, and the outlet pipe 8 is equipped with an outlet valve 10. The outer casing 1 is equipped with an overflow pipe 11, which is connected to the top of the water jacket. The overflow pipe 11 is equipped with an overflow valve 12, and the height of the outlet end of the overflow pipe 11 is higher than the height of the inlet end of the pumping pipe 4, so that the inlet end of the pumping pipe 4 can be submerged below the water surface inside the water jacket, which facilitates the circulation pump 3 to pump water from the top of the water jacket to other parts.

[0032] In this solution, when adding water to the water jacket, first close the outlet valve, open the inlet valve and the overflow valve, and add water to the water jacket through the inlet pipe until water starts to flow out of the overflow pipe, indicating that enough water has been added to the water jacket. Then close the overflow valve and the inlet valve to stop adding water.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A thermostat incubator for biological experiments, comprising a shell (1) and an inner container (2) located inside the shell (1), a water jacket is formed between the inner container (2) and the shell (1), and an electric heating element is arranged in the water jacket, characterized in that: The outer top wall of the shell (1) is provided with a circulating pump (3), the pump inlet of the circulating pump (3) is communicated with a water suction pipe (4), the pump outlet is communicated with a water delivery pipe (5), the water suction pipe (4) extends to the top of the water jacket, and the water delivery pipe (5) extends to the bottom of the water jacket.

2. The constant temperature incubator for biological experiments according to claim 1, characterized in that: The water jacket extends to the top of the inner container (2) and extends to the bottom of the inner container (2).

3. The constant temperature incubator for biological experiments according to claim 1, characterized in that: A plurality of water delivery holes (6) are arranged on the water delivery pipe (5) along the length direction of the water delivery pipe (5).

4. The constant temperature incubator for biological experiments according to claim 3, characterized in that: The pump outlet of the circulating pump (3) is communicated with a plurality of water delivery pipes (5), and the back side and both side walls of the shell (1) are provided with the water delivery pipes (5) at corresponding positions.

5. The constant temperature incubator for biological experiments according to claim 1, characterized in that: The shell (1) is provided with a water inlet pipe (7) and a water outlet pipe (8), the water inlet pipe (7) is communicated with the top of the water jacket, the water outlet pipe (8) is communicated with the bottom of the water jacket, the water inlet pipe (7) is provided with a water inlet valve (9), and the water outlet pipe (8) is provided with a water outlet valve (10).

6. The constant temperature incubator for biological experiments according to claim 5, characterized in that: The shell (1) is provided with an overflow pipe (11), the overflow pipe (11) is communicated with the top of the water jacket, the overflow pipe (11) is provided with an overflow valve (12), and the water outlet end of the overflow pipe (11) is higher than the water inlet end of the water suction pipe (4).

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