CN201154305Y - Biochemical analyzer reaction plate constant temperature room - Google Patents

Abstract

The utility model discloses a reaction plate thermostatic chamber for a biochemical analyzer, which comprises a cavity. The cavity has a bottom wall, a top wall and an annular side wall connecting the bottom wall and the top wall. The bottom wall, the top wall and the side walls The walls enclose the constant temperature chamber, the bottom wall is provided with at least one first heater, the top wall is provided with at least one second heater, and the side wall is provided with at least one third heater. The bottom wall, top wall and side wall of the cavity are all equipped with heaters, which ensures the uniformity of the heat source of the whole constant temperature room from the aspect of heat source, and also ensures the reaction of different positions in the whole constant temperature room during the air bath convective heat transfer process. The temperature uniformity of the reaction solution in the cup.

Description

Biochemical analyzer reaction plate constant temperature room

technical field

The utility model relates to a reaction disk constant temperature chamber used in a biochemical analyzer, in particular to a reaction disk constant temperature chamber whose constant temperature mode is an air dry bath.

Background technique

The project test of the biochemical analyzer has high-precision requirements for temperature accuracy and fluctuation, so it is very important to realize the constant temperature method of the biochemical analyzer. At present, there are roughly four types of reaction plate temperature control and constant temperature methods used in automatic biochemical analyzers: air dry bath, water bath, constant temperature liquid dry bath and solid direct heating constant temperature. From the perspective of simplifying the structure of the equipment and reducing maintenance costs, air dry baths are generally used.

The air dry bath uses hot air to heat the liquid in the reaction cup, and the stability of the reaction liquid is achieved by maintaining the stability of the air temperature. At the same time, in order to enhance the heat exchange of the hot air to the reaction liquid in the reaction cup, an axial flow fan is required. That is to strengthen the air convection disturbance in the constant temperature chamber to enhance heat transfer. However, this air dry bath method has the following disadvantages: 1) The natural convection heat transfer coefficient of general air is less than or equal to 10W/m ² .℃, and in order to enhance the heat transfer of hot air to the reaction solution in the cuvette, forced convection is required. Heat is to strengthen the convective disturbance of the air in the constant temperature chamber, which will also lead to the inhomogeneity of the temperature field in the constant temperature chamber, which will affect the temperature control effect of the reaction plate; 2) the heat source of the general air bath adopts the top heater of the constant temperature chamber+ The heater at the bottom of the constant temperature chamber or only the strip heater is placed on the side wall of the constant temperature chamber. The heat source is not evenly distributed in the constant temperature chamber, resulting in the uneven temperature in the entire constant temperature chamber.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a biochemical analyzer reaction plate constant temperature chamber with uniform temperature in the constant temperature chamber.

The technical solution adopted by the present invention to solve the technical problem is: a biochemical analyzer reaction plate constant temperature chamber, comprising a cavity, the cavity has a bottom wall, a top wall and an annular side wall connecting the bottom wall and the top wall, The bottom wall, top wall and side walls surround a constant temperature chamber, the bottom wall is provided with at least one first heater, the top wall is provided with at least one second heater, and the side wall is provided with at least one third heater.

The third heater has one and is annular.

The cavity is wrapped with an insulation layer.

At least one temperature sensor is also arranged in the constant temperature chamber.

There are at least two temperature sensors and they are evenly distributed.

The temperature sensors are fixed on the bottom wall of the cavity and vertically extend into the constant temperature cavity.

A biochemical analyzer reaction plate thermostatic chamber, comprising a cavity, at least one heater and at least two temperature sensors, the cavity has a bottom wall, a top wall and an annular side wall connecting the bottom wall and the top wall, the bottom wall The wall, the top wall and the side wall surround a constant temperature chamber, the heater is arranged on the chamber body, and the temperature sensor is arranged in the constant temperature chamber.

The heater includes at least one first heater arranged on the bottom wall, at least one second heater arranged on the top wall and at least one third heater arranged on the side wall.

There are at least three temperature sensors and they are evenly distributed.

A biochemical analyzer reaction plate constant temperature chamber, including a cavity, the cavity has a bottom wall, a top wall and an annular side wall connecting the bottom wall and the top wall, and the bottom wall, top wall and side walls surround the constant temperature chamber , the side wall is provided with an annular heater.

The beneficial effect of the present invention is that the bottom wall, the top wall and the side wall of the chamber are all provided with heaters, which ensures the uniformity of the heat source of the whole constant temperature chamber from the aspect of heat source, and also ensures that the air bath convective heat transfer process The temperature uniformity of the reaction liquid in the reaction cups at different positions in the whole constant temperature chamber.

Description of drawings

Fig. 1 is the schematic diagram of the longitudinal section of the reaction plate thermostatic chamber of the biochemical analyzer in the present embodiment;

Fig. 2 is a schematic cross-sectional view of the reaction plate thermostatic chamber of the biochemical analyzer in this embodiment.

Detailed ways

As shown in Fig. 1 and Fig. 2, the biochemical analyzer reaction plate constant temperature chamber of this embodiment includes a cavity 8, an insulating layer 7, a first heater 1, a second heater 2, a third heater 3 and a plurality of temperature sensors 4. The cavity 8 is made of heat-conducting metal aluminum, and it is composed of a bottom wall 81, a top wall 82 and an annular side wall 83 connecting the bottom wall 81 and the top wall 82. The bottom wall 81 and the top wall 82 are both roughly round. Shape, the side wall 83 is roughly circular, and the bottom wall 81 , top wall 82 and side wall 83 enclose a constant temperature chamber 84 . A plurality of cuvettes 6 can be placed in the constant temperature chamber 84 , and each cuvette 6 can rotate around the central axis 5 in the constant temperature chamber 84 . The insulation layer 7 wraps the entire cavity 8 , that is, the insulation layer 7 wraps the bottom wall 81 , the top wall 82 and the side wall 83 , so as to prevent interference from changes in the external environment. In the constant temperature chamber, in order to enhance the heat exchange requirement of the hot air for the reaction solution in the cuvette, an axial flow fan is still used to force convective heat transfer to strengthen the air convection disturbance in the constant temperature chamber.

There is at least one first heater 1, which is arranged on the bottom wall 81 of the cavity. There is at least one second heater 2, which is arranged on the top wall 82 of the cavity. There is at least one third heater 3, which is arranged on the side wall 83 of the cavity. Since the side wall 83 is roughly circular, the third heater 3 can be correspondingly circular. The heat transfer order of the reaction tray thermostatic chamber is: first heater 1, second heater 2, third heater 3→bottom wall 81, top wall 82 and side wall 83 of the chamber→reaction cup 6→reaction cup inside the reaction solution. The reaction plate thermostatic chamber ensures the uniformity of the heat source of the entire thermostatic chamber from the aspect of the heat source, and also ensures the temperature uniformity of the reaction solution in the reaction cups at different positions in the entire thermostatic chamber during the air bath convective heat transfer process.

In order to be able to fully perceive the temperature of each point in the thermostatic chamber, the thermostatic chamber adopts the method of multi-point arrangement of temperature sensors. This temperature sensor 4 has three, and these three temperature sensors 4 are all fixed on the bottom wall 81 of this cavity and vertically extend in this constant temperature cavity 84, and these three temperature sensors 4 are 120 degree uniform distributions, and these three The installation height of each temperature sensor 4 is slightly lower than the bottom wall of the cuvette 6. The average temperature of the temperature data collected by the three temperature sensors 4 is used as the average temperature of the hot air in the constant temperature chamber, which avoids the disadvantage of not being able to accurately collect the overall temperature caused by a single temperature collection point. The temperature control method is PID control. The first heater, the second heater and the third heater are controlled by the average temperature value collected at multiple points, so as to achieve the precise control of the constant temperature of 37°C. On the one hand, it ensures the uniformity of temperature at each point in the entire constant temperature room. For the reaction plate constant temperature chamber, heaters can be arranged on the top wall, side wall and bottom wall of the chamber to make the heating uniform; or only an annular heater can be arranged on the annular side wall of the chamber, It can also achieve the purpose of uniform heating.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deduction or substitutions can also be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (10)

1. A biochemical analyzer reaction plate thermostatic chamber, comprising a cavity, the cavity has a bottom wall, a top wall and an annular side wall connecting the bottom wall and the top wall, the bottom wall, the top wall and the side wall surround The constant temperature chamber is characterized in that: the bottom wall is provided with at least one first heater, the top wall is provided with at least one second heater, and the side wall is provided with at least one third heater. 2. The biochemical analyzer reaction plate thermostatic chamber according to claim 1, characterized in that: said third heater has one and is annular. 3. The biochemical analyzer reaction plate thermostatic chamber according to claim 1, characterized in that: said cavity is wrapped with an insulating layer. 4. The biochemical analyzer reaction plate thermostatic chamber according to any one of claims 1-3, characterized in that: at least one temperature sensor is also arranged in the thermostatic chamber. 5. The biochemical analyzer reaction plate thermostatic chamber according to claim 4, characterized in that: there are at least two temperature sensors and they are evenly distributed. 6 . The biochemical analyzer reaction plate thermostatic chamber according to claim 5 , wherein each of the temperature sensors is fixed on the bottom wall of the chamber and extends vertically into the thermostatic chamber. 7 . 7. A biochemical analyzer reaction plate thermostatic chamber, comprising a cavity, the cavity has a bottom wall, a top wall and an annular side wall connecting the bottom wall and the top wall, the bottom wall, the top wall and the side wall surround The constant temperature chamber is characterized in that it further includes at least one heater arranged on the chamber body and at least two temperature sensors arranged in the constant temperature chamber. 8. The biochemical analyzer reaction tray thermostatic chamber according to claim 7, characterized in that: said heater comprises at least one first heater arranged on the bottom wall, at least one second heater arranged on the top wall A heater and at least one third heater arranged on the side wall. 9. The biochemical analyzer reaction plate thermostatic chamber according to claim 7 or 8, characterized in that: there are at least three temperature sensors and they are evenly distributed, and each temperature sensor is fixed on the bottom wall of the cavity and vertically into the constant temperature chamber. 10. A biochemical analyzer reaction plate thermostatic chamber, comprising a cavity, the cavity has a bottom wall, a top wall and an annular side wall connecting the bottom wall and the top wall, the bottom wall, the top wall and the side wall surround The constant temperature chamber is characterized in that: the side wall is provided with an annular heater.

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