A new motor protection overheating phase failure protection device

Abstract

The application discloses a novel motor protection overheating and open-phase protection device and belongs to the field of motor protection devices. The novel motor protection overheating and open-phase protection device comprises a protection cavity, the inner upper surface left side of the protection cavity is fixedly connected with a vertical plate, the lower surface of the vertical plate is provided with a rotating groove, the inner part of the rotating groove is fixedly connected with a horizontal column, the outer side wall of the horizontal column is rotationally connected with a hole-bearing rotating plate, and the lower surface of the hole-bearing rotating plate is fixedly connected with a metal upper inclined block. The device can provide stable power supply for the motor when the motor normally works, and ensure the normal operation of the motor. When the motor is overheated or open-phase, the device can quickly respond. Through the synergistic effect of the air pump, the arc cavity, the sliding plate, the rotating drum and other components in the power-off device, the hole-bearing rotating plate is rotated, the metal upper inclined block is driven to move, the circuit between the power supply and the motor is cut off, and the motor is prevented from being continuously operated and damaged due to overheating or open-phase.

Description

Technical Field

[0001] This invention relates to the field of motor protection devices, and particularly to a novel motor overheating and phase loss protection device. Background Technology

[0002] Motors are widely used as crucial power drive components in numerous fields such as industrial production and machinery equipment. However, motors frequently encounter overheating and phase loss issues during long-term operation. Overheating can be caused by prolonged continuous operation, excessive load, poor heat dissipation, or other abnormal operating conditions, while phase loss is usually caused by a fault in the power supply phase line. If these problems are not addressed promptly, they can cause serious damage to the motor, such as winding burnout, insulation damage, and degraded motor performance. They may even trigger a complete equipment system failure, leading to production interruptions and significant economic losses.

[0003] While existing motor protection devices offer some protection, they often suffer from various shortcomings. Some devices only provide single-function overheat or phase loss protection, and their timeliness and accuracy in protection action are lacking. Some temperature monitoring devices cannot accurately detect the motor's real-time temperature, preventing protection from activating at the optimal time and resulting in poor protection effectiveness. Furthermore, after overheat protection is triggered, there is a lack of effective cooling measures to help the motor return to normal operation, requiring prolonged shutdown for cooling, which impacts production efficiency. In addition, the existing devices have suboptimal structural designs, leading to problems such as easily damaged components, short service life, high maintenance costs, and complex reset operations. Therefore, a new type of motor overheat and phase loss protection device with better overall performance, more comprehensive protection functions, more reliable operation, and a more optimized structure is needed to meet the growing demands of industrial production and the requirements for equipment reliability.

[0004] Therefore, a device is needed to solve these problems. It can effectively solve many problems existing in the current motor protection device, provide a more complete guarantee for the safe and stable operation of the motor, avoid a series of adverse consequences caused by motor failure, and ensure the continuity and economy of the production process. Summary of the Invention

[0005] Purpose of the invention: The purpose of this invention is to provide motor overheating and phase loss protection functions; another purpose of this invention is to provide a motor temperature monitoring and cooling system.

[0006] Technical Solution: A novel motor overheating and phase loss protection device includes a protection cavity. A vertical plate is fixedly connected to the left side of the upper inner surface of the protection cavity. A rotating groove is formed on the lower surface of the vertical plate. A horizontal column is fixedly connected inside the rotating groove. A perforated rotating plate is rotatably connected to the outer wall of the horizontal column. A metal upper inclined block is fixedly connected to the lower surface of the perforated rotating plate. An output block is fixedly connected to the left side of the lower inner surface of the protection cavity. A power-on terminal is symmetrically fixedly connected to the front surface of the output block, extending through to the front surface of the protection cavity and fixedly connected to a power-on wire. A power source is fixedly connected to the left side of the inner surface of the protection cavity. The power source and the metal lower inclined block are fixedly connected via a power wire. A metal lower inclined block is fixedly connected to the upper surface of the output block. The metal upper inclined block and its opposite side are in contact. The end of the power-on wire away from the power-on terminal is fixedly connected to a motor protection cover. A power-off device is provided inside the protection cavity, located to the right of the metal upper inclined block.

[0007] Furthermore, the power-off device includes an air pump. An arc-shaped cavity is fixedly connected to the upper inner surface of the protective cavity, to the left of the air pump. A sliding groove is formed inside the arc-shaped cavity, and a sliding plate is slidably connected inside the groove. An arc-shaped plate is fixedly connected to the left side of the sliding plate, and a groove is formed on the left side of the arc-shaped plate. A rotating rod is fixedly connected inside the groove, and a rotating cylinder is rotatably connected to the outer wall of the rotating rod. The rotating cylinder contacts the right side of the perforated rotating plate. A support column is fixedly connected above the lower surface of the protective cavity, and a reset device is fixedly connected to the upper surface of the support column. The cavity has a reset plate slidably connected inside. A horizontal plate is fixedly connected to the left side of the reset plate. Rotating columns are symmetrically fixedly connected to the outer side walls of the horizontal plate. Perforated insulating plates are rotatably connected to the outer side walls of the rotating columns. The left side of each perforated insulating plate is fixedly connected to the right side of the upper metal inclined block. A reset spring is symmetrically fixedly connected between the left side of the cavity and the left side of the reset plate. An air inlet chamber is fixedly connected to the right side of the arc-shaped cavity. The air inlet chamber is fixedly connected to the output end of the air pump. A hollow cavity is fixedly connected between the air inlet chamber and the arc-shaped cavity.

[0008] Furthermore, a sliding block is slidably connected inside the air intake chamber, and an L-shaped ventilation groove is opened inside the sliding block. Multiple air outlets are opened on the left side of the lower inner surface of the air intake chamber, and the air outlets are connected to the hollow cavity. An air dissipation groove is opened on the upper inner surface of the air intake chamber. A limiting protrusion is fixedly connected to the left side of the lower inner surface of the air intake chamber. A reset spring is fixedly connected between the sliding block and the left inner surface of the air intake chamber. An air inlet is opened on the left inner surface of the air intake chamber.

[0009] Furthermore, the motor protective cover has symmetrical slots inside, each slot having a temperature measuring plate fixedly connected inside. The motor protective cover also has cooling grooves inside, each cooling groove having a cooling tube engaged inside. Test leads are fixedly connected to the upper surface of the temperature measuring plate.

[0010] Furthermore, a circulating cooling chamber is fixedly connected to the right side of the lower inner surface of the protective cavity. A sliding opening is provided on the upper surface of the circulating cooling chamber, and a condensing cooling plate is slidably connected inside the sliding opening. A liquid pump is fixedly connected to the right side of the front surface of the circulating cooling chamber. The rear end of the liquid pump is fixedly connected to the circulating cooling chamber, and the front end of the input end of the liquid pump is fixedly connected to the cooling pipe. A backflow pipe is fixedly connected between the right end of the cooling pipe and the front surface of the circulating cooling chamber.

[0011] Furthermore, an insulating pad is fixedly connected to the outer wall of the rotating drum.

[0012] Furthermore, a temperature measuring switch is fixedly connected to the front surface of the protective cavity. The temperature measuring switch is electrically connected to the temperature measuring plate, the temperature measuring switch is signal connected to the air pump, and the temperature measuring switch is signal connected to the liquid pump.

[0013] Beneficial Effects: This device provides a stable power supply to the motor during normal operation, ensuring its smooth functioning. It responds quickly to overheating or phase loss in the motor. Through the coordinated action of components such as the air pump, arc-shaped cavity, sliding plate, and rotating drum within the power-off device, the perforated rotating plate rotates, thereby moving the upper metal inclined block and cutting off the circuit between the power supply and the motor, preventing damage from continuous motor operation due to overheating or phase loss. Simultaneously, components such as the sliding block and reset spring in the air intake chamber regulate the air intake process, ensuring stable air pressure and guaranteeing the reliability of the entire protection action. The reset spring resets the device after the fault is cleared, preparing for the restoration of power to the motor, greatly improving the safety and stability of motor operation, preventing more serious equipment damage caused by faults, and extending the motor's service life.

[0014] The device incorporates a temperature sensor and test leads within the motor's protective cover to accurately monitor motor temperature. If the temperature exceeds the limit, a temperature switch receives a signal, activating both the air pump for power-off protection and the liquid pump. The liquid pump circulates the coolant through the cooling pipes, circulating cooling chamber, and return pipe. As the coolant flows through the condensation cooling plate, it is further cooled, creating a highly efficient cooling system. This combination of temperature monitoring and cooling mechanisms not only intervenes at the initial stage of motor overheating to prevent damage but also continuously cools the motor, ensuring it operates within a suitable temperature range. This improves motor efficiency and performance while reducing downtime due to overheating, ensuring continuous and reliable equipment operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a cross-sectional view of the protective cavity of the present invention;

[0017] Figure 3 This is a cross-sectional view of the reset cavity of the present invention;

[0018] Figure 4 This is a cross-sectional structural schematic diagram of the arc-shaped plate of the present invention;

[0019] Figure 5 This is a schematic diagram of the overall structure of the perforated insulating plate of the present invention;

[0020] Figure 6 This is a cross-sectional view of the air intake chamber of the present invention;

[0021] Figure 7 This is a cross-sectional view of the motor protective cover of the present invention;

[0022] Figure 8 This is a cross-sectional view of the circulating cooling chamber of the present invention.

[0023] In the diagram: 1. Protective cavity; 2. Vertical plate; 3. Rotary groove; 4. Horizontal column; 5. Perforated rotating plate; 6. Upper metal inclined block; 7. Output block; 8. Power supply terminal; 9. Power supply wire; 10. Power supply; 11. Lower metal inclined block; 12. Motor protective cover; 13. Power off device; 14. Slot; 15. Temperature measuring plate; 16. Cooling tank; 17. Cooling tube; 18. Test line; 20. Circulating cooling chamber; 21. Sliding port; 22. Condensation cooling plate; 23. Liquid pump; 24. Backflow tube; 25. Insulating pad; 19. Temperature measuring switch; 101. Air pump; 102. Arc-shaped cavity; 103. Slide groove; 104. Slide plate; 105. Arc-shaped plate; 106. Groove; 107. Rotating rod; 108. Rotating cylinder; 109. Support column; 110. Reset cavity; 111. Reset plate; 112. Horizontal plate; 113. Rotating column; 114. Perforated insulating plate; 115. Reset spring; 116. Air inlet cavity; 117. Hollow cavity; 201. Sliding block; 202. L-shaped vent groove; 203. Air outlet; 204. Air dissipation groove; 205. Limiting protrusion; 206. Reset spring; 207. Air inlet. Detailed Implementation

[0024] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] like Figure 1-8 As shown, a novel motor overheating and phase loss protection device is provided, including a protection cavity 1: a vertical plate 2 is fixedly connected to the left side of the upper surface of the protection cavity 1, a rotating groove 3 is opened on the lower surface of the vertical plate 2, a horizontal column 4 is fixedly connected inside the rotating groove 3, a perforated rotating plate 5 is rotatably connected to the outer wall of the horizontal column 4, a metal upper inclined block 6 is fixedly connected to the lower surface of the perforated rotating plate 5, an output block 7 is fixedly connected to the left side of the lower surface of the protection cavity 1, a power supply 8 is symmetrically fixedly connected to the front surface of the output block 7, the power supply 8 extends through to the front surface of the protection cavity 1 and is fixedly connected to a power supply wire 9, a power supply 10 is fixedly connected to the left side of the protection cavity 1, the power supply 10 is fixedly connected to the metal lower inclined block 6 through a wire, a metal lower inclined block 11 is fixedly connected to the upper surface of the output block 7, the opposite side of the metal upper inclined block 6 and the metal upper inclined block 11 are in contact, a motor protection cover 12 is fixedly connected to the end of the power supply wire 9 away from the power supply end 8, and a power disconnect device 13 is provided inside the protection cavity 1 on the right side of the metal upper inclined block 6;

[0027] During normal operation, power supply 10 supplies power. Current flows through the wire connected to the upper metal inclined block 6, through the contact point between the upper metal inclined block 6 and the lower metal inclined block 11, to the output block 7, and then through the power-on terminal 8 and the power-on wire 9 to the motor protection cover 12, supplying power to the motor and enabling its normal operation. When the motor overheats, the power-off device 13 on the right side of the upper metal inclined block 6 is triggered. This causes the perforated rotating plate 5 to rotate around the horizontal column 4, moving the upper metal inclined block 6 and separating it from the lower metal inclined block 11, thus cutting off the circuit from power supply 10 to the output block 7. The current cannot reach the motor protection cover 12, and the motor stops operating, preventing damage due to malfunction and achieving overheat and phase loss protection functions.

[0028] In this embodiment, the power-off device 13 includes an air pump 101. An arc-shaped cavity 102 is fixedly connected to the upper inner surface of the protective cavity 1, located to the left of the air pump 101. A groove 103 is formed inside the arc-shaped cavity 102, and a sliding plate 104 is slidably connected inside the groove 103. An arc-shaped plate 105 is fixedly connected to the left side of the sliding plate 104, and a groove 106 is formed on the left side of the arc-shaped plate 105. A rotating rod 107 is fixedly connected inside the groove 106, and a rotating cylinder 108 is rotatably connected to the outer wall of the rotating rod 107. The rotating cylinder 108 contacts the right side of the perforated rotating plate 5. A support column 109 is fixedly connected above the lower surface of the protective cavity 1, and a reset cavity 110 is fixedly connected to the upper surface of the support column 109. The internal sliding connection of the reset plate 111 is provided. The left side of the reset plate 111 is fixedly connected to the horizontal plate 112. The outer side wall of the horizontal plate 112 is symmetrically fixedly connected to the rotating column 113. The outer side wall of the rotating column 113 is rotatably connected to the perforated insulating plate 114. The left side of the perforated insulating plate 114 is fixedly connected to the right side of the metal upper inclined block 6. The left side of the reset cavity 110 is symmetrically fixedly connected to the left side of the reset plate 111. The right side of the arc cavity 102 is fixedly connected to the air inlet cavity 116. The air inlet cavity 116 is fixedly connected to the output end of the air pump 101. The air inlet cavity 116 and the arc cavity 102 are fixedly connected to the hollow cavity 117. The outer side wall of the rotating cylinder 108 is fixedly connected to the insulating pad 25.

[0029] Under normal circumstances, the reset spring 115 keeps the reset plate 111 in a certain position, and the perforated insulating plate 114 and the metal upper inclined block 6 in their initial positions, maintaining normal circuit continuity. When the motor overheats or experiences a phase loss, the air pump 101 starts, filling the air intake chamber 116 and the arc-shaped chamber 102 with air. After the gas enters the arc-shaped chamber 102, it pushes the slide plate 104 to slide in the slide groove 103. The slide plate 104 drives the arc-shaped plate 105 and its rotating rod 107 and rotating cylinder 108 to move to the left. Since the rotating cylinder 108 is in contact with the perforated rotating plate 5, the rotating cylinder 108 pushes the perforated rotating plate 5 to the left to rotate around the horizontal column 4. The rotation of the perforated rotating plate 5 drives the metal upper inclined block 6 to move, separating it from the metal lower inclined block 11 and cutting off the circuit. At the same time, the perforated insulating plate 114 and the rotating column 113 also change positions with the movement of the reset plate 111, assisting the movement of the metal upper inclined block 6. The insulating pad 25 on the rotating drum 108 serves as insulation protection to prevent abnormal leakage and other situations. When the fault is cleared, the air pump 101 stops working, and the reset spring 115 pulls the reset plate 111 and other components back to their original positions, restoring the circuit to normal operation.

[0030] In this embodiment, a sliding block 201 is slidably connected inside the air intake cavity 116. An L-shaped ventilation groove 202 is opened inside the sliding block 201. Multiple air outlets 203 are opened on the left side of the lower inner surface of the air intake cavity 116. The air outlets 203 are connected to the hollow cavity 117. An air dissipation groove 204 is opened on the upper inner surface of the air intake cavity 116. A limiting protrusion 205 is fixedly connected to the left side of the lower inner surface of the air intake cavity 116. A reset spring 206 is fixedly connected between the sliding block 201 and the left inner surface of the air intake cavity 116. An air inlet 207 is opened on the left inner surface of the air intake cavity 116.

[0031] Under normal conditions, the reset spring 206 maintains the sliding block 201 in a certain position within the air intake chamber 116. When the air pump 101 fills the air intake chamber 116 with air, the gas enters the air intake chamber 116 from the air inlet 207.

[0032] Part of the gas pushes the sliding block 201 to the right, causing it to slide within the air intake chamber 116. Simultaneously, due to the L-shaped vent groove 202 inside the sliding block 201, gas can enter the hollow cavity 117 through the vent hole 203, thus participating in subsequent actions such as pushing the slide plate 104. When the air intake chamber 116 is full of gas, the limiting protrusion 205 restricts the movement range of the sliding block 201, preventing excessive sliding and ensuring its movement remains within a reasonable range. When the air pump 101 stops working, the sliding block 201 resets to the left under the elastic force of the reset spring 206, preparing for the next action. Simultaneously, gas dissipates through the gas dissipation groove 204, causing the arc plate 105 inside the arc cavity 102 to return to its original position, thus regulating and controlling the air intake process. This ensures stable air pressure during air pump 101 inflation and normal system operation, while also guaranteeing the safe and stable operation of the entire protection device.

[0033] In this embodiment, the motor protective cover 12 has symmetrically arranged slots 14 inside, and temperature measuring plates 15 are fixedly connected inside each slot 14. The motor protective cover 12 also has cooling grooves 16 inside, and cooling pipes 17 are engaged inside the cooling grooves 16. Test leads 18 are fixedly connected to the upper surface of the temperature measuring plates 15. A temperature switch 19 is fixedly connected to the front surface of the protective cavity 1. The temperature switch 19 is electrically connected to the temperature measuring plates 15, signal-connected to the air pump 101, and signal-connected to the liquid pump 2. 3. Signal connection: A circulating cooling chamber 20 is fixedly connected to the right side of the lower inner surface of the protection chamber 1. A sliding opening 21 is opened on the upper surface of the circulating cooling chamber 20. A condensing cooling plate 22 is slidably connected inside the sliding opening 21. A liquid pump 23 is fixedly connected to the right side of the front surface of the circulating cooling chamber 20. The rear end of the liquid pump 23 is fixedly connected to the circulating cooling chamber 20. The front end of the input end of the liquid pump 23 is fixedly connected to the cooling pipe 17. A backflow pipe 24 is fixedly connected between the right end of the cooling pipe 17 and the front surface of the circulating cooling chamber 20.

[0034] The motor protective cover 12 has a slot 14 inside, and the temperature measuring plate 15 in the slot is connected to the temperature measuring switch 19 through the test line 18 to monitor the motor temperature. When the motor temperature is too high, the temperature measuring switch 19 receives a signal, which sends a signal to the air pump 101 to start the power-off protection, and notifies the liquid pump 23 on the other hand. The circulating cooling chamber 20 is located in the protective chamber 1, and its sliding port 21 contains a condensing cooling plate 22. One end of the liquid pump 23 is connected to the cooling pipe 17, and the other end is connected to the circulating cooling chamber 20, and there is a backflow pipe 24 between the cooling pipe 17 and the circulating cooling chamber 20. After the liquid pump 23 is started, the coolant is drawn from the cooling pipe 17, enters the circulating cooling chamber 20 through the liquid pump 23, and then flows back through the backflow pipe 24 to form a coolant circulation. When the coolant flows through the condensing cooling plate 22, it will be further cooled, thereby achieving continuous cooling protection for the motor.

[0035] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A novel motor overheating and phase loss protection device, comprising a protection chamber (1), characterized in that: A vertical plate (2) is fixedly connected to the left side of the upper inner surface of the protective cavity (1). A rotating groove (3) is provided on the lower surface of the vertical plate (2). A horizontal column (4) is fixedly connected inside the rotating groove (3). A perforated rotating plate (5) is rotatably connected to the outer wall of the horizontal column (4). A metal upper inclined block (6) is fixedly connected to the lower surface of the perforated rotating plate (5). An output block (7) is fixedly connected to the left side of the lower inner surface of the protective cavity (1). A power-conducting end (8) is symmetrically fixedly connected to the front surface of the output block (7). The power-conducting end (8) extends through to the front surface of the protective cavity (1) and is fixed. A power supply (10) is fixedly connected to the left side of the inner cavity (1) of the protective cavity (1). The power supply (10) is fixedly connected to the lower metal block (6) by a power supply. A lower metal block (11) is fixedly connected to the upper surface of the output block (7). The upper metal block (6) and the upper metal block (11) are in contact with each other. A motor protective cover (12) is fixedly connected to the end of the power supply (9) away from the power supply end (8). A power-off device (13) is provided inside the protective cavity (1) on the right side of the upper metal block (6).

2. The novel motor overheating and phase loss protection device according to claim 1, characterized in that: The power-off device (13) includes an air pump (101). An arc-shaped cavity (102) is fixedly connected to the upper inner surface of the protective cavity (1) on the left side of the air pump (101). A sliding groove (103) is provided inside the arc-shaped cavity (102). A sliding plate (104) is slidably connected inside the sliding groove (103). An arc-shaped plate (105) is fixedly connected to the left side of the sliding plate (104). A groove (106) is provided on the left side of the arc-shaped plate (105). A rotating rod (107) is fixedly connected inside the groove (106). A rotating cylinder (108) is rotatably connected to the outer wall of the rotating rod (107). The rotating cylinder (108) is in contact with the right side of the perforated rotating plate (5). A support column (109) is fixedly connected above the lower surface of the protective cavity (1). A reset cavity (109) is fixedly connected to the upper surface of the support column (109). 10) A reset plate (111) is slidably connected inside the reset cavity (110). A horizontal plate (112) is fixedly connected to the left side of the reset plate (111). A rotating column (113) is symmetrically fixedly connected to the outer side wall of the horizontal plate (112). A perforated insulating plate (114) is rotatably connected to the outer side wall of the rotating column (113). The left side of the perforated insulating plate (114) is fixedly connected to the right side of the metal upper inclined block (6). A reset spring (115) is symmetrically fixedly connected between the left side of the reset cavity (110) and the left side of the reset plate (111). An air inlet cavity (116) is fixedly connected to the right side of the arc cavity (102). The air inlet cavity (116) is fixedly connected to the output end of the air pump (101). A hollow cavity (117) is fixedly connected between the air inlet cavity (116) and the arc cavity (102).

3. The novel motor overheating and phase loss protection device according to claim 1, characterized in that: The air intake chamber (116) is slidably connected to a sliding block (201). The sliding block (201) has an L-shaped ventilation groove (202) inside. The lower surface of the air intake chamber (116) has multiple air outlets (203) on the left side. The air outlets (203) are connected to the hollow cavity (117). The upper surface of the air intake chamber (116) has a diffuser groove (204). The lower surface of the air intake chamber (116) is fixedly connected to a limiting protrusion (205). A reset spring (206) is fixedly connected between the sliding block (201) and the left side of the air intake chamber (116). The left side of the air intake chamber (116) has an air inlet (207).

4. A novel motor overheating and phase loss protection device according to claim 1, characterized in that: The motor protective cover (12) has symmetrical slots (14) inside, and a temperature measuring plate (15) is fixedly connected inside each slot (14). The motor protective cover (12) has a cooling groove (16) inside, and a cooling tube (17) is engaged inside the cooling groove (16). A test line (18) is fixedly connected to the upper surface of the temperature measuring plate (15).

5. A novel motor overheating and phase loss protection device according to claim 1, characterized in that: A circulating cooling chamber (20) is fixedly connected to the right side of the lower inner surface of the protective cavity (1). A sliding opening (21) is provided on the upper surface of the circulating cooling chamber (20). A condensing cooling plate (22) is slidably connected inside the sliding opening (21). A liquid pump (23) is fixedly connected to the right side of the front surface of the circulating cooling chamber (20). The rear end of the liquid pump (23) is fixedly connected to the circulating cooling chamber (20). The front end of the input end of the liquid pump (23) is fixedly connected to the cooling pipe (17). A backflow pipe (24) is fixedly connected between the right end of the cooling pipe (17) and the front surface of the circulating cooling chamber (20).

6. A novel motor overheating and phase loss protection device according to claim 1, characterized in that: An insulating pad (25) is fixedly connected to the outer wall of the rotating drum (108).

7. A novel motor overheating and phase loss protection device according to claim 1, characterized in that: A temperature measuring switch (19) is fixedly connected to the front surface of the protective cavity (1). The temperature measuring switch (19) is wired to the temperature measuring plate (15), the temperature measuring switch (19) is signal-connected to the air pump (101), and the temperature measuring switch (19) is signal-connected to the liquid pump (23).

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