Protection device for high and low temperature test box
By setting dual metal sheet temperature switches in the fan of the high and low temperature test box, when the motor power source is too high, the air circulation failure and temperature of the equipment caused by the motor failure are solved to ensure the safety of the equipment.
Patent Information
- Application Number
- CN202420490671.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-03-14
AI Technical Summary
After working for a long time, the motor heats up and may cause jams or bearing locks, resulting in air circulation failure, resulting in excessive temperature and safety accidents.
Design a protective device, including setting dual metal sheet temperature switches in the fan. The power cord of the motor is connected in series with the power cord of the temperature opening and closed parts. When the temperature of the motor reaches the movement temperature, the dual metal chip temperature switch cuts the motor power supply to prevent overheating.
Effectively prevent hidden safety hazards caused by motor failure, ensure that the air circulation in the high and low temperature test box is normal, and avoid safety accidents caused by high temperature.
Smart Images
Figure CN222401508U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of high and low temperature test chambers, and in particular to a protection device for high and low temperature test chambers. Background Art
[0002] High and low temperature test chamber is a kind of equipment for testing the temperature reliability of industrial products. It is widely used in electronics, electrical engineering, automobiles, motorcycles, aerospace and other industries.
[0003] Existing high and low temperature test chambers generally include control systems, refrigeration systems, heating systems, temperature monitoring systems, air circulation systems, etc. Among them, the main components of the air circulation system include fans, which include impellers, motors, reducers, etc. When working, the motor drives the impeller to rotate through the reducer to supply or return air to the test chamber.
[0004] With respect to the above-mentioned related technologies, the inventors have found that there are at least the following problems: when the high and low temperature test chamber has been working for a long time, the motor will heat up; if the motor is stuck or the bearing is locked, the air in the high and low temperature test chamber cannot be discharged (i.e., air circulation cannot be performed), causing the temperature inside the high and low temperature test chamber to be too high, which in turn causes the motor temperature to be too high and cause a safety accident. Utility Model Content
[0005] In order to improve the potential safety hazard caused by motor failure, the present application provides a protection device for a high and low temperature test chamber.
[0006] The present application provides a protection device for a high and low temperature test chamber, which adopts the following technical solution:
[0007] A protective device for a high and low temperature test chamber, comprising a fan arranged on a body and a control system for controlling the operation of the fan; the fan comprises a motor, the fan is provided with a temperature opening and closing component for controlling the power supply of the motor, the power line of the motor is connected in series with the power line of the temperature opening and closing component, and the power line of the temperature opening and closing component is connected to the control system.
[0008] Preferably, the temperature opening and closing component is a bimetallic temperature switch, which includes a cover for sensing temperature. When installed, the cover abuts against the heating part of the motor; when working, the contacts of the bimetallic temperature switch are in a closed state.
[0009] Preferably, the motor is located at the top of the machine body, and the machine body is provided with a protective cover at the motor, and the motor is completely accommodated in the inner cavity of the protective cover.
[0010] Preferably, a plurality of heat dissipation holes are provided on the top of the protective cover, and the positions of the heat dissipation holes correspond to the positions of the motor.
[0011] Preferably, the protective cover is detachably connected to the machine body.
[0012] Preferably, there are at least two motors, and the number of the bimetallic temperature switches is the same as the number of the motors.
[0013] In summary, the present application includes at least one of the following beneficial effects:
[0014] 1. In normal operation, the contacts on the bimetallic temperature switch are in a closed state. When the temperature of the motor reaches the operating temperature, the bimetallic strip on the bimetallic temperature switch generates internal stress due to heat and quickly operates, that is, opening the contacts, cutting off the power supply of the motor, and shutting down the motor, thereby improving the safety hazards caused by motor failure;
[0015] 2. The motor is located at the top of the machine body, which is convenient for inspection and maintenance of the motor; in addition, a protective cover is installed at the motor to protect the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of the high and low temperature test box of this embodiment of the present application;
[0017] Figure 2 This is a schematic diagram of the structure of the motor of this embodiment of the present application being located at the top of a high and low temperature test box;
[0018] Figure 3 This is a wiring diagram of the motor and bimetallic temperature switch in this embodiment of the present application.
[0019] Explanation of the accompanying drawings: 1. body; 2. motor; 3. bimetallic temperature switch; 4. resistor; 5. protective cover; 6. heat dissipation hole. DETAILED DESCRIPTION
[0020] The following is combined with Figure 1-3 This application is described in further detail.
[0021] A protection device for a high and low temperature test chamber disclosed in the embodiment of the present application, referring to Figure 1 and Figure 2 The protection device for the high and low temperature test chamber includes a fan installed on the body 1 and a control system for controlling the operation of the fan. The fan includes a motor 2 installed on the top of the body 1, and two motors 2 are installed at intervals on the top of the motor 2.
[0022] Reference Figure 1 and Figure 2 In addition, the machine body 1 is detachably connected with a protective cover 5 at the motor 2 to protect the motor 2. The protective cover 5 is installed on the top of the machine body 1 by bolts. During installation, both motors 2 are completely accommodated in the inner cavity of the protective cover 5.
[0023] Reference Figure 1 and Figure 2 The top of the protective cover 5 is located directly above the motor 2 and is provided with a plurality of heat dissipation holes 6 to dissipate heat from the motor 2.
[0024] Reference Figure 2 and Figure 3 The fan is located at the motor 2 and is equipped with a temperature switch for controlling the power supply of the motor 2. The temperature switch is a bimetallic temperature switch 3. The embodiment of the present application uses a KSD301 snap-action temperature control switch with a normally closed action function; that is, in normal use, the contact of the bimetallic temperature switch 3 is in a closed state.
[0025] Reference Figure 2 and Figure 3 Furthermore, the bimetallic temperature switch 3 includes a cover (not shown in the figure) for detecting temperature, and the cover is a side of the bimetallic temperature switch 3 away from the wiring contacts. During installation, one bimetallic temperature switch 3 is installed corresponding to one motor 2, and the cover abuts against the heating part of the motor 2.
[0026] Reference Figure 2 and Figure 3 It should be noted that the power line of the motor 2 is connected in series with the power line of the bimetallic temperature switch 3, and the power line of the bimetallic temperature switch 3 is connected to the control system. In addition, a resistor 4 is also connected in series in the circuit between the motor 2 and the bimetallic temperature switch 3 to limit the current to protect the motor 2.
[0027] The implementation principle of a protection device for a high and low temperature test chamber in the embodiment of the present application is as follows:
[0028] Before use, set the temperature value of the bimetallic temperature switch 3; during normal operation, the metal sheet on the bimetallic temperature switch 3 is in a free state, and the contacts on the bimetallic temperature switch 3 are in a closed state, and the control system can be used to control the operation of the motor 2; when the temperature of the motor 2 reaches the action temperature of the bimetallic temperature switch 3, the metal sheet on the bimetallic temperature switch 3 generates internal stress due to the heat and quickly acts, that is, opens the contacts, cuts off the power supply of the motor 2, and turns off the motor 2, thereby improving the safety hazard caused by the failure of the motor 2.
[0029] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A protection device for a high and low temperature test chamber, comprising a fan arranged on a body (1) and a control system for controlling the operation of the fan; characterized in that: The fan comprises a motor (2), the fan is provided with a temperature switch component for controlling the power supply of the motor (2), the power line of the motor (2) is connected in series with the power line of the temperature switch component, and the power line of the temperature switch component is connected to a control system.
2. A protection device for a high and low temperature test chamber according to claim 1, characterized in that: The temperature opening and closing component is a bimetallic temperature switch (3), and the bimetallic temperature switch (3) comprises a cover for sensing temperature. When installed, the cover abuts against the heating part of the motor (2); when working, the contacts of the bimetallic temperature switch (3) are in a closed state.
3. A protection device for a high and low temperature test chamber according to claim 1, characterized in that: The motor (2) is located at the top of the machine body (1); a protective cover (5) is provided on the machine body (1) at the motor (2); and the motor (2) is completely accommodated in the inner cavity of the protective cover (5).
4. A protection device for a high and low temperature test chamber according to claim 3, characterized in that: A plurality of heat dissipation holes (6) are provided on the top of the protective cover (5), and the positions of the heat dissipation holes (6) correspond exactly to the positions of the motor (2).
5. The protection device for a high and low temperature test chamber according to claim 3, characterized in that: The protective cover (5) is detachably connected to the machine body (1).
6. A protection device for a high and low temperature test chamber according to claim 2, characterized in that: There are at least two motors (2), and the number of the bimetallic temperature switches (3) is the same as the number of the motors (2).