Laboratory electric furnace with multiple heating modes

Abstract

The utility model discloses a laboratory electric furnace with multiple heating modes, which comprises a main body, a furnace plate is arranged on the main body, an electric furnace wire is arranged on the furnace plate, a plurality of metal shifting pieces are arranged in the main body, the metal shifting pieces are respectively connected with heating resistors in series, and the heating resistors are in one-to-one correspondence and have different resistance values. The multiple heating resistors are all connected with the electric stove wire in series, an adjusting button is arranged on the main body, and the adjusting button is used for controlling the electric stove wire, the metal shifting pieces and the corresponding heating resistors to be sequentially connected in series. The device has the beneficial effects that the device has multiple heating modes, and different heating modes can be quickly switched according to sample test stages.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental electric furnaces, in particular to a laboratory electric furnace with multiple heating modes. Background Art

[0002] The laboratory electric furnace is a necessary heating instrument in the laboratory. It has the characteristics of fast heating, low idle consumption, and simple operation. It is often used for sample carbonization burning. At present, the electric furnace used in the laboratory can only perform simple heating when in use, and the heating temperature range is relatively fixed. In the prior art, although the method of using the laboratory electric furnace is very simple, due to the different test stages of the sample, the temperature range required for each stage is also different.

[0003] Therefore, it is necessary to propose a laboratory electric furnace with multiple heating modes, which can quickly switch between different heating modes according to the sample test stage. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and proposes a laboratory electric furnace with multiple heating modes. The utility model has multiple heating modes and can quickly switch between different heating modes according to the sample test stage.

[0005] The purpose of the utility model is achieved through the following technical scheme: a laboratory electric furnace with multiple heating modes, including a main body, a furnace plate is arranged on the main body, an electric furnace wire is arranged on the furnace plate, a plurality of metal paddles are arranged in the main body, the plurality of metal paddles are respectively connected in series with a one-to-one corresponding heating resistor with different resistance values, the plurality of heating resistors are connected in series with the electric furnace wire, an adjustment button is arranged on the main body, and the adjustment button is used to control the electric furnace wire, the metal paddles and the corresponding heating resistors to be connected in series in sequence.

[0006] The utility model also comprises a temperature controller, which comprises a display screen arranged on the main body and an explosion-proof platinum-rhodium thermocouple arranged below the electric furnace wire.

[0007] The main body is provided with an alarm device which is electrically connected with the temperature controller.

[0008] The main body is provided with a temperature setting button and a number button group.

[0009] A timing button is arranged on the main body.

[0010] The beneficial effects of the utility model are as follows: the utility model can preset the temperature, adjust the temperature, and can regularly shut down the heating laboratory electric furnace, thereby avoiding the blindness of experimental personnel operating based on experience and improving the experimental efficiency and the accuracy of experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1This is the front view of the utility model;

[0012] Figure 2 This is a schematic diagram of the connection of the electric furnace wire of the utility model;

[0013] Figure 3 It is a schematic diagram of electrical connection of heating resistor;

[0014] In the figure, 1-main body, 2-power switch, 3-thermostat, 4-digital button group, 5-adjustment button, 6-temperature setting button, 7-timing adjustment button, 8-alarm, 9-stove plate, 10-electric furnace wire, 11-metal pick, 12-heating resistor. DETAILED DESCRIPTION

[0015] The following will be combined with the embodiments to clearly and completely describe the technical solution 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 of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0016] It is to be noted that the concepts of directions “left”, “right”, “up”, “down”, “front”, “back”, “inside” and “outside” in the following schemes are all relative directions and will not be listed one by one here.

[0017] A laboratory electric furnace with multiple heating modes, see Figure 1 , including a main body 1. A power switch 2, a digital button group 4 (including ten digital buttons from 0 to 9, a delete button and an OK button), an adjustment button 5, a temperature setting button 6, a timing adjustment button 7 and an alarm 8 are arranged on the front side of the main body 1.

[0018] refer to Figure 2 The main body 1 is provided with a furnace plate 9, and the furnace plate 9 is provided with an electric furnace wire 10. The main body 1 is also provided with a temperature controller 3. The temperature controller 3 includes a digital display screen provided on the front side of the main body 1 and an explosion-proof platinum-rhodium thermocouple located below the electric furnace wire, and the explosion-proof platinum-rhodium thermocouple displays the real-time temperature on the digital display screen. The digital display screen can view information such as the preset temperature, current temperature, heating timing, and heating mode.

[0019] refer to Figure 3Three metal paddles 11 controlled by the adjustment button 5 are arranged in the main body 1. The three metal paddles are connected in series with three heating resistors 12 with different resistance values ​​that are evenly matched. The heating powers output by the three heating resistors are 1000W, 600W and 300W respectively. The three metal paddles 11 are respectively connected in series with the corresponding heating resistors 12, corresponding to the fast heating mode, the uniform heating mode, and the heat preservation heating mode; the three metal paddles 11 are not connected to the heating resistors 12, corresponding to the stop heating mode. The thermostat 3, the adjustment button 5, the alarm 8, the temperature setting button 6, the timing adjustment button 7 and the digital button group 4 are all electrically connected.

[0020] When using it, connect the power of the instrument, turn on the power switch 2, click the temperature setting button 6, click the 0-9 number button to set the preheating temperature, click the confirmation button to confirm the preheating temperature, and then click the adjustment button 5 to select the heating mode. You can choose the fast heating / uniform heating mode, and click the confirmation button to confirm the heating mode; at this time, the left side of the upper display of the thermostat 3 displays the preset temperature, the right side displays the current temperature, and the bottom displays the heating mode. When the temperature of the electric furnace rises to the preset temperature, the alarm 8 sounds to remind the experimenter, and the experimenter has 3 options:

[0021] The first method: when the heating temperature reaches the preset heating temperature, there is no need to continue heating. At this time, what needs to be operated is to click the adjustment button 5 to adjust the heating mode to the stop heating mode to stop heating. After the heating is completed, press the power switch 2 and unplug the socket to end the heating;

[0022] The second method: maintaining the preset heating temperature to keep the heated object at a constant temperature. What needs to be done is to click the adjustment button 5, adjust the heating mode to the insulation heating mode, and put the alarm 8 in a silent state. The electric furnace can continue to heat intermittently in a quiet state so that the heated object continues to react at a constant temperature. At this time, the preset temperature is displayed on the left side of the upper display screen of the thermostat 3, the current temperature is displayed on the right side, and the heating mode is displayed at the bottom. After the heating is completed, press the power switch 2, unplug the socket, and the heating is finished.

[0023] The third type: maintaining the preset heating temperature to keep the heated object at a constant temperature, then what needs to be done is to click the adjustment button 5, adjust the heating mode to the insulation heating mode, put the alarm 8 in a silent state, and then click the timing adjustment button 7 to set the insulation time. At this time, the preset temperature is displayed on the upper left side of the display screen of the thermostat 3, the current temperature is displayed on the right side, the scheduled heating time is displayed in the middle, and the heating mode is displayed at the bottom. The electric furnace can continue to heat intermittently in a quiet state so that the heated object continues to react at a constant temperature. When the scheduled heating ends, the alarm 8 sounds to remind the experimenter that the heating is over, and automatically adjusts the mode to the metal pick 11 that stops heating. The electric furnace automatically stops heating to avoid excessive heating due to the absence of the experimenter on site, which damages the experimental samples and causes sample waste.

[0024] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above description or the technology or knowledge in the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A laboratory electric furnace with multiple heating modes, characterized in that: The utility model comprises a main body, a furnace plate is arranged on the main body, an electric furnace wire is arranged on the furnace plate, a plurality of metal paddles are arranged in the main body, the plurality of metal paddles are respectively connected in series with a one-to-one corresponding heating resistor with different resistance values, the plurality of heating resistors are connected in series with the electric furnace wire, and an adjustment button is arranged on the main body, the adjustment button is used to control the electric furnace wire, the metal paddles and the corresponding heating resistors to be connected in series in sequence.

2. A laboratory electric furnace with multiple heating modes according to claim 1, characterized in that: The utility model also comprises a temperature controller, which comprises a display screen arranged on the main body and an explosion-proof platinum-rhodium thermocouple arranged below the electric furnace wire.

3. A laboratory electric furnace with multiple heating modes according to claim 2, characterized in that: The main body is provided with an alarm device which is electrically connected with the temperature controller.

4. A laboratory electric furnace with multiple heating modes according to claim 2, characterized in that: The main body is provided with a temperature setting button and a number button group.

5. The laboratory electric furnace with multiple heating modes according to claim 1, characterized in that: A timing button is arranged on the main body.

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