CN101135604A - Micro-sample chamber temperature control device - Google Patents

Abstract

The invention relates to a temperature regulating device for a miniature sample chamber. It includes a main box body composed of a sample chamber and its built-in cooling and heating components, an external circulating water cooling box and a control system; The installed circulating water cooling tank is connected to the heat dissipation base plate through the water inlet and outlet pipes; the temperature sensor placed in the control system in the sample chamber is connected to the computer through the data acquisition card, and the output control signal of the computer is connected to the controller, which controls the semiconductor cooling fins and Circulating water cooling tank. The invention has a small volume and can be used as a miniature temperature regulating device for temperature regulation in a sample room, and has the advantages of environmental protection and energy saving, and the temperature regulation range can reach -10°C to 55°C.

Description

Micro-sample chamber temperature control device

technical field

The invention relates to a temperature regulating device, in particular to a miniature sample chamber temperature regulating device for controlling the temperature of a welding liquid crystal light valve response characteristic testing device by means of semiconductor cooling and heating.

Background technique

In the welded liquid crystal light valve response characteristic test device, the influence of temperature on the liquid crystal light valve needs to be considered, so the temperature adjustment must be carried out in the sample chamber of the welded liquid crystal light valve response characteristic test device. The volume of the sample chamber is relatively small, so the design A micro-temper that fits the sample chamber is necessary. Existing thermostats are mostly used for temperature regulation by air compressors, but the working environment of the compressor refrigeration system has vibration and noise. It controls the temperature through the on and off of the current, so the accuracy is not high and cannot Meet the test requirements. At the same time, the harm of refrigerant Freon to the atmosphere has been recognized by the scientific community: Freon destroys the ozone layer of the atmosphere and forms an ozone hole, causing the greenhouse effect and directly affecting the earth's ecosystem. How to eliminate the harm of Freon and other refrigerants to the atmosphere is a major problem to be solved. In addition, ordinary thermostats are based on the original refrigeration equipment and rely on adding resistance wires to achieve the purpose of heating. However, this method brings a lot of inconvenience to the installation and maintenance of the entire device, and also greatly increases the temperature of the entire device. volume of. With the miniaturization of instruments, this contradiction is becoming more and more obvious. At present, most cooling systems use air cooling, but this method is noisy and the heat generated is not easy to dissipate.

Contents of the invention

The object of the present invention is to provide a micro-sample chamber temperature-regulating device that is pollution-free and does not destroy the atmospheric ozone layer in response to the needs of a welding liquid crystal light valve response characteristic testing device. The present invention uses semiconductors as cooling and heating materials, which prevents the harm to the atmosphere caused by the use of Freon and other refrigerants, and due to the characteristics of semiconductors, it can achieve both cooling and heating without adding resistance wires and other components. Therefore, the whole device has the advantages of simple structure, small size, and convenient installation and maintenance. The heat radiation cooling system of the present invention adopts circulating water cooling, and the system is energy-saving, environment-friendly and has no noise. The present invention can also be used as a common miniature temperature regulating device.

To achieve the above object, the present invention adopts the following technical solutions:

A miniature sample room temperature adjustment device, which is composed of a sample room and a main box body composed of built-in cooling and heating components, an external circulating water cooling box and a control system, and is characterized in that: the built-in cooling and heating components are attached to The semiconductor cooling fins and heat dissipation bottom plate on the wall of the sample chamber; the external circulating water cooling tank communicates with the heat dissipation bottom plate through the inlet and outlet pipes; the control system is: the temperature sensor placed in the sample chamber The card is connected to the computer, and the output control signal of the computer is connected to the controller, and the controller controls the semiconductor cooling fins and the circulating water cooling box.

The inner material of the above-mentioned sample room is aluminum plate, and the outer layer is equipped with thermal insulation material; the top surface and one side of the sample room have opening and closing windows, and the other three sides have heat dissipation bottom plates, and the water inlet and outlet pipes are connected to the external circulating water for cooling. box, and a semiconductor cooling heat sheet is pasted on the heat dissipation bottom plate.

On each side of the above-mentioned sticking heat dissipation bottom plate and the semiconductor cooling heat sheet, paste two heat dissipation bottom plates and two semiconductor cooling heat sheets.

The six semiconductor cooling fins attached to the three sides of the above-mentioned sample chamber are connected in series, and the six cooling base plates attached in total are also connected in series.

The circulating water cooling heat tank is composed of a water pump, a cooler, and water inlet and outlet pipes. The water pump provides power for the circulating water cooling system. The outlet pipe of the heat conduction device is connected to the inlet pipe of the cooling system, and then connected to the cooler to reduce the temperature of the water. After passing through the cooler, the outlet pipe is connected. The water inlet pipes are connected to complete the water cycle. Take away the heat and lower the temperature.

Compared with the prior art, the present invention has the following obvious outstanding substantive features and significant advantages: the device has the advantages of environmental protection and energy saving; the temperature range that the device can detect is -10°C to 55°C, and the Program control; this device has the advantages of no vibration and noise, because it is cooled by circulating water, and there is no heating problem caused by air cooling. The device has a small size and can be used as a temperature control device for welding the response characteristic test device of the liquid crystal light valve to truly reflect the temperature value of the liquid crystal light valve environment, and can also be used as an ordinary miniature temperature adjustment test device.

Description of drawings

Fig. 1 is the structural principle block diagram of invention

Fig. 2 is the structural representation of the example main box of the invention

Figure 3 is a top view of Figure 2

Fig. 4 is the schematic diagram of the temperature control circuit of the invention example

Detailed ways

A preferred embodiment of the present invention is: see Fig. 1 and Fig. 2. The miniature sample chamber temperature adjustment device includes a main body box 1, a control system 2, a circulating water cooling box 3, and a signal line connecting the main body box 1 and the control system 2 and an inlet and outlet pipe connecting the main body box 1 and the circulating water cooling box 3. The control system 2 includes a power supply 7, a temperature sensor 5, a data acquisition card 8, a computer 9 and a controller 6; the main body box 1 includes a sample chamber 4, a two-dimensional linear guide rail 15, a clamping device 14, and a semiconductor Refrigerating (heating) sheet 11, heat dissipation bottom plate 10 and the water pipe fixedly connected therewith. The inner layer material of the sample chamber 4 is an aluminum plate with high thermal conductivity, and the outer layer of the sample chamber is equipped with thermal insulation materials. The wall can also be opened to facilitate the installation of the two-dimensional linear guide 15 and the clamping device 14 and the replacement of the liquid crystal light valve. There is a slot 17 at the end of the sample chamber to facilitate the movement of the guide rail. There are screws 18 on it. Tighten and unscrew to determine the characteristic point test scale of the liquid crystal light valve. The side of the sample chamber 4 is except that one side can be opened, and the other three sides need to be pasted with semiconductor refrigeration (heat) sheets 11, and each side is pasted with two sheets, and there are six sets of semiconductor system (heat) sheets connected in series; on the outside of the semiconductor sheet There are six sets of heat conduction devices fixedly connected with heat dissipation bottom plate 10 and water inlet and outlet pipes and connected in series. The inlet and outlet pipes of the main body box (1) and the outlet and inlet pipes of the circulating water cooling tank 3 are connected to each other, and the generated heat is taken away by water circulation. The schematic circuit diagram of this embodiment is shown in FIG. 4 .

The working principle of the present invention: the signal line between the main body box 1 and the control system 2 not only provides power for the main body box 1, but also transmits the signal of the sensor 5 to the control system 2, between the main body box 1 and the circulating water cooling box 3 The inlet and outlet pipes take away the heat generated. The temperature sensor 5 detects the temperature in the sample chamber and displays it through the temperature display circuit; the control system 2 compares the set temperature value with the temperature value detected by the temperature sensor 5, and the switch control circuit encodes the comparison signal and sends it to the switch network circuit. The switch network circuit connects different voltage values according to different signals, and then drives the semiconductor refrigeration (heat) sheet 11 to work; the circulating water cooling system exports and dissipates the heat generated in the above process; at the same time, the sensor will detect the temperature through The data acquisition card 8 performs analog/digital conversion and introduces the signal to the computer 9 for analysis and processing.

Claims (4)

1. A miniature sample room temperature regulating device, comprising a main box (1) composed of a sample room (4) and its built-in cooling and heating components, an external circulating water cooling box (3) and a control system (2), It is characterized by: 1), the built-in cooling and heating component is a semiconductor cooling and heating sheet (11) and a heat dissipation bottom plate (10) attached to the inner wall of the sample chamber (4); 2), the external circulating water cooling tank (3) communicates with the heat dissipation bottom plate (10) through the inlet and outlet pipes; 3), the control system is: the temperature sensor (5) placed in the sample chamber (4) is connected to the computer (9) through the data acquisition card (8), and the output control signal of the computer (9) is connected to the controller ( 6), the semiconductor cooling fin (11) and the circulating water cooling box (3) are controlled by the controller (6). 2. miniature sample chamber temperature regulating device according to claim 1, it is characterized in that the inner layer material of described sample chamber (4) is an aluminum plate, and outer layer is equipped with insulation material; The top surface of sample chamber (4) And one side has opening and closing window, and all the other three sides have heat dissipation bottom plate (10), and its water inlet and outlet pipes communicate with the external circulating water cooling box, and put semiconductor cooling fins (11) on the heat dissipation bottom plate (10). 3. The miniature sample room temperature regulating device according to claim 2, characterized in that two heat dissipation bottom plates (10) and two heat dissipation bottom plates (10) and two Semiconductor cooling heat sheet (11). 4. The micro-sample chamber temperature regulating device according to claim 3, characterized in that six semiconductor cooling fins (11) that are placed on three sides of the sample chamber (4) are connected in series with each other, and are placed together. The six heat dissipation bottom plates (10) are also connected in series.

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