A kind of automobile washing pump anti-idling structure

Abstract

The utility model provides a kind of automobile washing pump idle running prevention structure, it solves when washing liquid is insufficient in water tank or liquid is evacuated, pump body continues to run, and it can lead to motor idle running problem.The utility model includes pump body, motor shell, water inlet and water outlet, pump body is equipped with pump cover, copper insert is fixed on pump cover;Motor shell rear end is equipped with cover plate, cover plate is equipped with protector, protector is equipped with insertion port, and protector side is equipped with infrared sensor, pump body outside is equipped with detection cavity, detection cavity lower end is connected water tank, cavity is equipped with buoy body, detection cavity is equipped with detector, and it is equipped with infrared transmitter, opposite infrared sensor on protector, motor shell rear end is also equipped with resistance, capacitance and controller.The utility model has the advantages that: through detection cavity water level monitoring and infrared signal transmission, it automatically stops when water shortage, to prevent idle running;While delay circuit avoids false triggering, improves motor operation safety and washing pump service life.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and relates to a car wash pump, and particularly to a car wash pump anti-dry running structure. Background Technology

[0002] Existing car wash pumps typically use an electric motor to drive an impeller, drawing wash liquid from a reservoir and spraying it onto the windshield surface to remove dust, mud, and snow.

[0003] In existing technology, when the washing liquid in the storage tank is insufficient or the liquid is emptied, the pump body continues to operate, causing the motor to run dry. Prolonged dry running can easily lead to motor overheating, pump body dry friction, shortened service life, and even burnout. The rotating shaft and sliding parts inside the pump body rely heavily on the washing liquid for cooling and lubrication. When the liquid is insufficient or clogged with impurities, the impeller runs dry, easily causing excessive wear of parts, increased noise, and decreased performance.

[0004] Therefore, existing car wash pumps still need further improvement in preventing dry running. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in the existing technology by providing a structure to prevent dry running of a car wash pump. To achieve the above objective, this utility model is implemented through the following technical solution:

[0006] This utility model discloses an anti-dry-running structure for a car wash pump, including a pump body, a motor, an inlet, and an outlet. A pump cover is installed on the pump body, and two copper inserts are fixed on the pump cover. The lower ends of the copper inserts are inside the pump body. Positive and negative terminals are provided on both sides of the motor housing, with the rear ends of both terminals extending beyond the rear end of the motor housing. A cover plate is installed on the motor housing, and the cover plate has two fitting openings for the positive and negative terminals to pass through. Grooves are provided on the two sides of the cover plate perpendicular to the positive and negative terminals. A protector is installed in one of the grooves, and the protector has two connecting parts of the same shape as the copper inserts, connecting to the lower ends of the copper inserts. The other side of the protector's groove is fan-shaped, where adjacent resistors and capacitors are installed, forming a triangular distribution with the copper inserts. A controller with a cylindrical outer shell is placed between the resistors and capacitors.

[0007] In the aforementioned anti-dry-running structure for car wash pumps, the protector is equipped with an infrared sensor that receives commands via infrared light.

[0008] In the aforementioned anti-dry-running structure for the car wash pump, heat dissipation holes are provided on the cover plate.

[0009] In the above-mentioned anti-dry running structure of the car wash pump, a detection chamber is installed on the outside of the pump body, the lower end of the detection chamber is connected to the water tank, and a notch is provided at the upper end of the detection chamber.

[0010] In the above-mentioned anti-dry running structure for car wash pumps, a detector is installed on one side of the arc-shaped wall of the detection chamber. The detector is characterized by having an infrared transmitter, which is arc-shaped and extends out of the upper end of the detection chamber, and is parallel to the aforementioned protector.

[0011] In the aforementioned anti-dry-running structure for car wash pumps, the buoy body is a hollow structure.

[0012] In the aforementioned anti-dry-running structure for a car wash pump, a buoy that moves according to the water level is installed inside the detection chamber and is connected to the detector.

[0013] Compared with existing technologies, the anti-dry-running structure for a car wash pump provided by this utility model has the following beneficial effects: A detection chamber is installed on the outside of the pump body. An infrared sensor installed in the protector on the cover plate receives signals and can automatically identify and cut off the motor when the pump body is short of water or the water intake is insufficient, thereby avoiding overheating, wear, or even burnout of the motor due to dry running, and greatly improving the service life and reliability of the wash pump; A resistor, capacitor, and controller are installed on the cover plate to form a delay circuit that can monitor the motor current in real time. When the current rises abnormally, the current output is immediately limited to avoid damage; At the same time, the delay protection circuit can avoid false triggering of protection in short-term abnormalities, ensuring the continuity and stability of the pump body operation, and realizing intelligent protection of the motor. Attached Figure Description

[0014] Figure 1 This is a bottom view of the present invention;

[0015] Figure 2 This is a cross-sectional view of the detection cavity of this utility model;

[0016] Figure 3 This is a front view of the motor and cover plate in this utility model;

[0017] Figure 4 This is the front view of the protector in this utility model;

[0018] The components are as follows: 1. Pump body; 2. Pump cover; 3. Inlet; 4. Outlet; 5. Motor housing; 6. Detection chamber; 61. Notch; 7. Detector; 71. Infrared transmitter; 72. Buoy body; 8. Cover plate; 81. Fitting opening; 82. Heat dissipation hole; 9. Negative terminal; 10. Positive terminal; 11. Protector; 111. Insertion port; 112. Infrared sensor; 12. Capacitor; 13. Resistor; 14. Copper connector; 15. Controller. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solution of the present invention. However, the described embodiments are only a part of the embodiments of the present invention.

[0020] In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] like Figure 1 and Figure 2 As shown, the anti-dry-running structure of this car wash pump includes a pump body 1, a motor housing 5, a water inlet 3, and a water outlet 4. A detection chamber 6 is installed on the outside of the pump body 1, and the lower end of the detection chamber 6 is connected to the water tank. A float 72 is installed inside the detection chamber 6 and connected to it via an induction wire. The middle part of the float 72 is hollow. Because the detection chamber 6 is connected to the water tank, the float 72 can float and move with the liquid surface. A detector 7 is installed on one side of the arc-shaped wall of the detection chamber 6, extending from the bottom of the detection chamber 6 to the upper notch 61, and an infrared transmitter 71 is installed on the extended portion.

[0022] A sensor is installed at the bottom of the buoy body 72. The buoy body 72 moves with the water level in the detection chamber 6. When the water level reaches the lowest point and the buoy body 72 contacts the bottom of the detection chamber 6, the sensor transmits a command to the infrared transmitter 71 at the upper end through the sensing wire.

[0023] like Figure 3As shown, positive terminals 10 and negative terminals 9 are provided on both sides of the motor housing 5, and both positive terminals 10 and negative terminals 9 extend out of the rear end of the motor housing 5. A cover plate 8 is installed at the rear end of the motor housing 5. There are fitting openings 81 on both sides of the cover plate 8, which allow the positive terminals 10 and negative terminals 9 to pass through. A groove is provided at the end perpendicular to both sides of the fitting openings 81 and close to the detection cavity 6. A protector 11 is installed on the groove. Two copper inserts 14 are also installed on the protector 11. The protector 11 is electrically connected to the positive terminals 10 and negative terminals 9 on both sides through wires. The protector 11 is equipped with a second induction element, which can limit the input current when the current rises instantaneously due to foreign object jamming, dry running or overload operation of the motor, so as to prevent the motor coil from overheating and burning out. At the other end of the protector 11, there are two adjacent grooves. A resistor 13 and a capacitor 12 are installed in the grooves. A controller 15 installed in a cylinder is provided between the resistor 13 and the capacitor 12. The three are arranged in a straight line to form a time delay circuit. Resistor 13 and capacitor 12 are electrically connected to two copper terminals 14 via wires. The controller 15 in the middle is electrically connected to resistor 13, capacitor 12, positive terminal 10 and negative terminal 9, as well as the two copper terminals 14, to prevent the motor from failing to start normally due to instantaneous overcurrent triggering the protector 11.

[0024] The positive terminal 10 and the negative terminal 9 have heat dissipation holes 82 on both sides near the center.

[0025] like Figure 4 As shown, the protector 11 is provided with two flat insertion ports 111 that are the same shape as the copper insert 14. The copper insert 14 is fixed on the pump cover 2, and its lower end is inside the pump body 1. It is fixed inside the protector 11 and connected to the motor through the insertion ports 111. An infrared sensor 112 corresponding to the infrared transmitter 71 at the notch 61 of the detection chamber 6 is provided on the side of the protector 11 near the detection chamber 6.

[0026] The working principle of this utility model is as follows: A detection chamber 6 is installed on the outside of the pump body 1, and a float 72 is installed inside. The float 72 moves with the liquid level in the detection chamber 6. When the surface of the float 72 contacts the bottom, it transmits a signal to the protector 11 on the motor housing 5 through the infrared transmitter 71 at the upper end of the detector 7, thereby disconnecting the connection and stopping the motor from rotating. This prevents the motor impeller from running dry and the motor from overheating, avoiding damage to the motor. To prevent the current from rising instantaneously due to foreign object obstruction, dry running, or overload operation, a time-delay circuit structure is installed at the rear end of the motor. The time-delay protection circuit keeps the power supply directly connected for 1 second after the motor starts, without triggering the protection; after the delay, it enters the monitoring state. Once the protector 11 receives a continuous overcurrent signal, it immediately disconnects the circuit to protect the motor.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dry-running prevention structure for a car wash pump, comprising a pump body (1), a motor housing (5), a water inlet (3), and a water outlet (4), characterized in that: A pump cover (2) is installed on the pump body (1). Two copper inserts (14) are fixed on the pump cover (2). The lower ends of the copper inserts (14) are inside the pump body (1). A positive terminal (10) and a negative terminal (9) are provided on both sides of the housing. The rear ends of the positive terminal (10) and the negative terminal (9) extend out of the rear end of the housing. A cover plate (8) is installed on the housing. The cover plate (8) is provided with two fitting openings (81) for the positive terminal (10) and the negative terminal (9) to pass through. The cover plate (8) and the positive terminal (10) and the negative terminal (9) are fitted together. The negative terminal (9) has grooves on both sides perpendicular to each other. A protector (11) is installed on one of the grooves. The protector (11) has two insertion ports (111) with the same shape as the copper plug (14) and is connected to the lower end of the copper plug (14). The groove on the other side of the protector (11) is fan-shaped and has adjacent resistors (13) and capacitors (12) installed, forming a triangular distribution with the copper plug (14). A controller (15) with a cylindrical shell is set between the resistor (13) and the capacitor (12).

2. The anti-dry-running structure for a car wash pump according to claim 1, characterized in that: The protector (11) is equipped with an infrared sensor (112) that receives commands via infrared light.

3. The anti-dry-running structure for a car wash pump according to claim 1, characterized in that: The cover plate (8) is provided with heat dissipation holes (82).

4. The anti-dry-running structure for a car wash pump according to claim 1, characterized in that: A detection chamber (6) is installed on the outside of the pump body (1). The lower end of the detection chamber (6) is connected to the water tank, and a notch (61) is provided at the upper end of the detection chamber (6).

5. The anti-dry-running structure for a car wash pump according to claim 4, characterized in that: A detector (7) is installed on one side of the arc-shaped wall of the detection cavity (6). An infrared transmitter (71) is provided at the notch (61) at the upper end of the detection cavity (6), which is arc-shaped and parallel to the above-mentioned protector (11).

6. The anti-dry-running structure for a car wash pump according to claim 4, characterized in that: The detection chamber (6) is equipped with a buoy (72) that moves according to the water level and is connected to the detector (7).

7. The anti-dry-running structure for a car wash pump according to claim 6, characterized in that: The buoy body (72) has a hollow structure.

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