Electronic balance

Abstract

The utility model discloses an electronic balance, which comprises a bottom plate and a shell, the shell is hermetically connected with the bottom plate, a weighing sensor, a temperature control device, a spirit bubble and a control circuit board are arranged in the shell, the weighing sensor, the temperature control device, the spirit bubble and the control circuit board are all mounted on the bottom plate, a weighing platform is arranged on the weighing sensor, and the temperature control device is arranged on the bottom plate. The weighing platform penetrates through the shell and extends to the position above the shell, a windproof cover is arranged outside the weighing platform and connected with the shell in a sealed mode, a connecting piece is arranged on the weighing platform, and the upper end of the connecting piece penetrates through the windproof cover and is connected with a balance tray. Compared with the prior art, the electronic balance provided by the utility model has the beneficial effects that the electronic balance can be heated or cooled by arranging the temperature control device, so that the I-grade and II-grade electronic balance can be normally used under the condition that the environment temperature is higher than 30 DEG C or lower than 10 DEG C, the temperature application range of the electronic balance is expanded, the operation is simple, and the cost is low. And the working efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic balances, in particular to an electronic balance. Background Art

[0002] Due to the rapid development of science and technology, people have higher and higher requirements for electronic balances. For example, the Chinese utility model patent with publication number CN214010518U, entitled "An electronic balance", discloses an electronic balance structure, including a base and a windshield arranged on the base, which reduces the influence of airflow on the internal weighing platform and the weighing sensor through the windshield, thereby improving the weighing accuracy. This practice is also the common practice of the current prior art, but this practice has a very obvious defect that the windshield needs to be opened and closed during weighing, and the operation procedure is cumbersome; in addition, since the electronic balance, especially the weighing sensor, is greatly affected by the ambient temperature, it is generally required to use the electronic balance under certain temperature conditions, such as the working environment temperature of the Class I balance is 17.5℃~22.5℃, and the working environment temperature of the Class II balance is 10℃~30℃. Therefore, when the working environment temperature is less than 10℃ or greater than 30℃, the accuracy of the electronic balance will be greatly affected.

[0003] Therefore, developing an electronic balance that is not limited by ambient temperature is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0004] The purpose of the utility model is to provide an electronic balance to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electronic balance, comprising a base plate and a shell, the shell and the base plate are sealed together, a weighing sensor, a temperature control device, a level bubble and a control circuit board are arranged in the shell, the weighing sensor, the temperature control device, the level bubble and the control circuit board are all mounted on the base plate, a weighing platform is arranged on the weighing sensor, the weighing platform passes through the shell and extends to the top of the shell, a windshield is arranged outside the weighing platform, the windshield is sealed together with the shell, a connecting piece is arranged on the weighing platform, and the upper end of the connecting piece passes through the windshield and is connected to the balance tray.

[0006] Preferably, the temperature control device comprises a refrigeration component and a heating component, the refrigeration component is mounted on the base plate, and the heating components are respectively mounted on the inner walls of the shell.

[0007] Preferably, the refrigeration assembly includes a Peltier, a cooling plate, a heat sink and thermal insulation cotton, the cooling plate is bonded to the cooling surface of the Peltier, the heat sink is bonded to the heating surface of the Peltier, and the heat sink and the Peltier are separated by the thermal insulation cotton.

[0008] Preferably, the heating component is an electric heating film.

[0009] Preferably, a heat insulation layer is provided between the base plate and the weighing sensor.

[0010] Preferably, a heat insulation layer is provided on the outer surface of the shell.

[0011] Preferably, screw holes are provided at both ends of the bottom plate.

[0012] Preferably, the bottom end surface of the base plate is provided with supporting feet.

[0013] Preferably, a sealing rubber pad is provided between the bottom plate and the shell.

[0014] Preferably, an aviation plug connector is provided on the shell.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the electronic balance provided by the utility model can heat up or cool down the electronic balance by setting a temperature control device, so that the Class I and Class II electronic balances can be used normally when the ambient temperature is higher than 30°C or lower than 10°C, thereby improving the temperature adaptability range of the electronic balance, and the operation is simple, which can improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is an explosion diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the explosion of the refrigeration component of the utility model.

[0019] In the figure: 1. Base plate; 11. Support feet; 2. Shell; 3. Weighing sensor; 4. Level bubble; 5. Control circuit board; 6. Weighing platform; 7. Wind shield; 8. Connector; 9. Refrigeration component; 91. Peltier; 92. Refrigeration plate; 93. Heat sink; 94. Insulation cotton; 10. Aviation plug connector. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3The utility model provides a technical solution: an electronic balance, comprising a bottom plate 1 and a shell 2, the shell 2 and the bottom plate 1 are sealed, for example, a sealing rubber pad is used to achieve a sealing effect between the bottom plate 1 and the shell 2, so that the airflow cannot enter the shell 2 and affect the accuracy of weighing. Screw holes are provided at both ends of the bottom plate 1, which is convenient for fixing the utility model on a workbench. The bottom end surface of the bottom plate is provided with a supporting foot 11, and the shell 2 is provided with a weighing sensor 3, a temperature control device, a level bubble 4 and a control circuit board 5. The weighing sensor 3, the temperature control device, the level bubble 4 and the control circuit board 5 are all installed on the bottom plate 1. The bottom plate 1 and the shell 2 form a sealed space, which can better provide an accurate weighing environment for the electronic balance and reduce the interference of the airflow on the weighing result. A weighing platform 6 is provided on the weighing sensor 3, and the weighing platform 6 extends through the shell 2 to the top of the shell 2. A windshield 7 is provided outside the weighing platform 6, and the windshield 7 is sealed and connected to the shell 2. A connecting piece 8 is provided on the weighing platform 6, and the upper end of the connecting piece 8 passes through the windshield 7 to connect the balance tray.

[0022] In this embodiment, the temperature control device includes a refrigeration component 9 and a heating component. The refrigeration component is installed on the base plate 1, and the heating components are respectively installed on the inner walls of the shell 2, including the four inner side walls and the inner fixed wall of the shell 2. The heating component is preferably an electric heating film, and other heating methods can also be used, such as electric heating wires.

[0023] In this embodiment, the refrigeration assembly 9 includes a Peltier 91, a cooling sheet 92, a heat sink 93 and thermal insulation cotton 94. The cooling sheet 92 is bonded to the cooling surface of the Peltier 91, the heat sink 93 is bonded to the heating surface of the Peltier 91, and the heat sink 93 and the Peltier 91 are separated by the thermal insulation cotton 94.

[0024] In this embodiment, a heat insulation layer is provided between the base plate 1 and the weighing sensor 3 .

[0025] In this embodiment, a heat insulation layer is provided on the outer surface of the housing 2 .

[0026] In this embodiment, an aviation plug connector 12 is provided on the housing 2, and the aviation plug connector 12 is connected to a computer through a cable for communication, so that an operator can remotely control the balance.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electronic balance, comprising a base plate and a housing, wherein the housing and the base plate are sealed and connected, characterized in that: A weighing sensor, a temperature control device, a level bubble and a control circuit board are arranged in the shell, and the weighing sensor, the temperature control device, the level bubble and the control circuit board are all mounted on the bottom plate. A weighing platform is arranged on the weighing sensor, and the weighing platform passes through the shell and extends to the top of the shell. A wind shield is arranged outside the weighing platform, and the wind shield is sealed with the shell. A connecting piece is arranged on the weighing platform, and the upper end of the connecting piece passes through the wind shield and is connected to the balance pan.

2. An electronic balance according to claim 1, characterized in that: The temperature control device comprises a refrigeration component and a heating component. The refrigeration component is mounted on the bottom plate, and the heating components are respectively mounted on the inner walls of the shell.

3. An electronic balance according to claim 2, characterized in that: The refrigeration assembly includes a Peltier, a refrigeration sheet, a heat sink and thermal insulation cotton. The refrigeration sheet is bonded to the cooling surface of the Peltier, the heat sink is bonded to the heating surface of the Peltier, and the heat sink and the Peltier are separated by the thermal insulation cotton.

4. An electronic balance according to claim 3, characterized in that: The heating component is an electric heating film.

5. An electronic balance according to claim 1, characterized in that: A heat insulation layer is provided between the bottom plate and the weighing sensor.

6. An electronic balance according to claim 1, characterized in that: The outer surface of the shell is provided with a heat insulation layer.

7. An electronic balance according to claim 1, characterized in that: Screw holes are arranged at two ends of the bottom plate.

8. An electronic balance according to claim 1, characterized in that: The bottom end surface of the bottom plate is provided with supporting feet.

9. An electronic balance according to claim 1, characterized in that: A sealing rubber pad is arranged between the bottom plate and the shell.

10. An electronic balance according to claim 1, characterized in that: An aviation plug connector is arranged on the shell.

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