Motor intelligent starting overheating protection system

Abstract

The utility model provides an intelligent motor starting overheating protection system, which relates to the technical field of motors, and comprises a pump shell and a pump head, a motor is arranged in the pump shell, a coil is wound on a rotor of the motor, a PTC temperature controller is arranged at the coil, the coil is electrically connected with the PTC temperature controller, and the PTC temperature controller is electrically connected with a motor switch; a box body is arranged on the top of the pump shell, a capacitor and a circuit board are arranged in the box body, and the circuit board is provided with an energization delay switch relay. The beneficial effects of the utility model are that when the current flowing through the coil exceeds the rated current, the temperature of the coil is rapidly raised, and when the temperature detected by the PTC temperature controller exceeds the rated temperature, the PTC temperature controller is disconnected, so that the coil is protected, and the motor is ensured to be automatically powered off and not burnt in a long-time working state and an unattended condition; and when the PTC temperature controller detects that the temperature of the coil is lower than the rated temperature and the motor switch is switched off to cut off the power supply, the PTC temperature controller can be reset, so that the motor is prevented from being repeatedly started, and the safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an intelligent starting overheat protection system for motors. Background Art

[0002] Gear pumps are widely used in food processing as a conveying device for viscous materials. For example, they can be used in filling ice cream machines, jelly machines, sesame paste and chili sauce, or in the frying industry to extract oil for filtration. Gear pumps include pump housing, motor and pump head. However, if there are impurities in the pump head or the oil solidifies, the pump head will be blocked, the motor coil will have a short-term high current and the temperature will rise rapidly, resulting in a burnout protection.

[0003] Chinese patent announcement number CN201820692432.7 discloses a low-noise motor device, whose technical solution is that an overheating protection device is provided on the structure, and the overheating protection device is installed on the device. When the temperature is detected by the temperature sensor as being too high, the electromagnetic coil is turned on, and the connection extrusion contact is repelled by the electromagnetic coil, and the stretching contact is driven to move up by the connection extrusion contact, and the stretching contact is connected to the buzzer, so that the buzzer alarms, and the overheating protection device prevents the motor from overheating and damaging the pump housing. However, this structure ultimately reminds the operator to handle the problem by turning on the buzzer to alarm. If the buzzer fails and the operator does not hear it or handles it in time, it is still easy to cause the motor to overheat and be damaged. Utility Model Content

[0004] The utility model overcomes the shortcomings of the prior art, provides a motor intelligent starting overheat protection system, and can solve the problems mentioned in the background technology.

[0005] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0006] A motor intelligent starting overheat protection system comprises a pump casing and a pump head. A motor is arranged in the pump casing. A coil is wound on the rotor of the motor. A PTC thermostat is arranged at the coil. The coil is electrically connected to the PTC thermostat, and the PTC thermostat is electrically connected to the motor switch. A box body is arranged on the top of the pump casing. A capacitor and a circuit board are arranged in the box body. The circuit board is provided with a power-on delay switch relay. The coil is electrically connected to the capacitor, and the capacitor is electrically connected to the power-on delay switch relay.

[0007] Furthermore, a heating tube is arranged in the pump head.

[0008] Furthermore, the pump housing is provided with a box body, and the box body is provided with an assembly hole; and a hollow terminal head is threadedly connected to the assembly hole.

[0009] Furthermore, a rubber sleeve is arranged inside the wiring head.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] When the current flowing through the coil exceeds the rated current, the coil will heat up rapidly. At this time, the PTC thermostat will disconnect when it detects that the temperature exceeds the rated temperature, which protects the coil and helps to ensure that the motor will automatically cut off power when the temperature reaches the rated temperature when working for a long time and unattended, protecting the motor from burning out. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the pump housing viewed from the side, where the PTC thermostat is located inside the pump housing. The pump housing corresponding to the PTC thermostat is hollowed out in the figure;

[0014] Figure 2 Schematic diagram of the pump casing from the top, with the box body in the open state;

[0015] Figure 3 It is a three-dimensional view of the pump housing;

[0016] Figure 4 It is a schematic diagram of the circuit connections of various components.

[0017] In the figure:

[0018] 0. Coil; 1. Pump housing; 2. Pump head; 201. Heating tube; 3. PTC thermostat; 4. Box body; 5. Capacitor; 6. Circuit board; 601. Power-on delay switch relay; 7. Terminal block; 8. Rubber sleeve; 10. Motor switch. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0020] like Figures 1 to 4 As shown, a motor intelligent starting overheat protection system includes a pump casing 1 and a pump head 2. The pump casing 1 is provided with a motor, the pump head 2 is provided with a feed port and a discharge port, and the pump head 2 is provided with a driving gear and a driven gear that mesh with each other. The rotor of the motor is connected to the driving gear, and the rotor of the motor drives the driving gear to rotate, and the driving gear drives the driven gear to rotate, so that the working volume formed by the inner cavity of the pump head 2 and the driving gear and the driven gear changes, thereby achieving the effect of liquid material transportation. The above is the structure of the current gear pump and will not be repeated here.

[0021] The improvement of the utility model is that the rotor of the motor is wound with a coil 0, and a PTC thermostat 3 is arranged next to the coil 0. The PTC thermostat 3 is used to detect the temperature of the coil 0. When the current flowing through the coil 0 exceeds the rated current, the coil 0 will heat up. When the temperature reaches the rated temperature of the PTC thermostat, the PTC thermostat 3 will disconnect and cut off the power to protect the motor. A box body 4 is arranged on the top of the pump housing 1. The box body 4 is fixed on the top of the pump housing 1 by screws. A capacitor 5 and a circuit board 6 are arranged in the box body 4. The circuit board 6 is provided with a power-on delay switch relay 601. The coil 0 is electrically connected to the capacitor 5, and the capacitor 5 is electrically connected to the power-on delay switch relay 601; the coil 0 and the PTC thermostat 3 are both electrically connected to the circuit board 6, and the circuit board 6 is electrically connected to the motor switch 10.

[0022] When the motor switch 10 is closed, the coil 0 of the motor is energized to work, and when the PTC thermostat 3 detects that the coil 0 will heat up, when the temperature reaches the rated temperature of the PTC thermostat 3, the PTC thermostat 3 will disconnect and stop, so that the coil 0 stops heating, ensuring that the motor will automatically power off and not burn out when it works for a long time and is unattended; when the PTC thermostat 3 detects that the temperature of the coil 0 is lower than the rated temperature, and when the motor switch 10 is disconnected to cut off the power supply, the circuit board 6 outputs a command to the PTC thermostat 3, and the PTC thermostat 3 will be reset to connect the circuit and avoid repeated starting of the motor. The circuit board 6 outputting a command to the PTC thermostat 3 is a conventional prior art and will not be repeated here; when the PTC thermostat 3 is reset and the motor switch 10 is connected, if the motor cannot start after a few seconds, the power-on delay switch relay 601 will be disconnected to prevent the capacitor 5 from heating up when it is energized.

[0023] A heating tube 201 is arranged in the pump head 2. Before the motor is started, the heating tube 201 can be powered on to generate heat, so that the liquid material in the pump head 2 melts under the action of high temperature, thereby avoiding jamming or blocking caused by cooling blockage; an assembly hole is arranged in the box body 4; a hollow terminal head 7 is threadedly connected to the assembly hole, and the threaded connection structure is convenient for assembly and disassembly, and the power cord is connected to the electronic components in the box body 4 by passing through the terminal head 7; a rubber sleeve 8 is arranged in the terminal head 7, and the power cord passes through the rubber sleeve 8, and the rubber sleeve 8 has a certain insulation effect. Since the terminal head 7 is made of metal material, the power cord is also protected by the inner rubber sleeve 8 to avoid wear caused by direct friction between the power cord and the terminal head 7.

[0024] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor intelligent starting overheat protection system, characterized in that: The pump comprises a pump housing (1) and a pump head (2). A motor is arranged in the pump housing (1). A coil is wound around the rotor of the motor. A PTC thermostat (3) is arranged next to the coil. A box body (4) is arranged on the top of the pump housing (1). A capacitor (5) and a circuit board (6) are arranged in the box body (4). The circuit board (6) is provided with a power-on delay switch relay (601). The coil is electrically connected to the capacitor (5). The capacitor (5) is electrically connected to the power-on delay switch relay (601). The coil and the PTC thermostat (3) are both electrically connected to the circuit board (6). The circuit board (6) is electrically connected to the motor switch.

2. The motor intelligent starting overheat protection system according to claim 1 is characterized in that: The box body (4) is provided with an assembly hole; a hollow wiring head (7) is threadedly connected to the assembly hole.

3. The motor intelligent starting overheat protection system according to claim 2 is characterized in that: A rubber sleeve (8) is arranged inside the wiring head (7).

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