Anti-freezing water pump

Abstract

The utility model discloses an anti-freezing water pump which comprises a pump body and a motor, a drain hole is formed in the bottom of the pump body, a plugging piece is arranged at the drain hole, a discharge port is further formed in the pump body, the discharge port is higher than the drain hole, and an electromagnetic valve is arranged at the discharge port. After the water pump is used in a cold region, the electromagnetic valve is kept in an open state, so that residual water in the pump body does not exceed the height of the discharge port, and the space in the pump body at the upper part of the discharge port meets the space required for increasing the volume when the residual water is frozen, so that the anti-freezing performance is well guaranteed, and the residual water is still kept in the pump body; and the water pump can be conveniently restarted next time.

Description

Technical Field

[0001] The utility model relates to the field of water pumps, in particular to an anti-freezing water pump. Background Art

[0002] In some cold regions, whenever the water pump is used up, the water in the pump body must be drained, otherwise the water pump is often damaged when the water in the pump body freezes.

[0003] The prior art generally installs compressible parts in the pump body. When the water freezes and its volume increases, the ice will compress these parts, and the space compressed out by the parts offsets the increased volume when the water freezes. However, the space occupied by these parts in the pump body reduces the water storage capacity in the pump body. For a water pump with a self-priming function, it has a negative impact on the suction lift. At the same time, the compressible space provided by the compressible parts is relatively limited. When the water pipe connected to the water pump is too long, it will exceed the compression limit of the parts, and there is still a risk of bursting the water pump or the pipeline.

[0004] Another solution is to set a heating device inside or outside the pump to keep the water temperature above 0°C through the heating device. This is very power-consuming and uneconomical. Summary of the Utility Model

[0005] In order to further ensure the anti-freezing performance, the present application provides an anti-freezing water pump.

[0006] The present application provides an anti-freezing water pump, adopting the following technical solutions:

[0007] An anti-freezing water pump includes a pump body and a motor. A drain hole is provided at the bottom of the pump body, and a plugging member is provided at the drain hole. A discharge port is also provided on the pump body, and the height of the discharge port is higher than that of the drain hole. A solenoid valve is provided at the discharge port.

[0008] Optionally, it further includes a controller. The solenoid valve is electrically connected to the motor. The controller has a temperature setting module. When the temperature sensed by the temperature sensor in the pump body is lower than the temperature value set by the temperature setting module, the controller controls the solenoid valve to open.

[0009] Optionally, when the motor is powered off, the solenoid valve remains open.

[0010] Optionally, the temperature sensor is integrated on the solenoid valve.

[0011] Optionally, the temperature set by the temperature setting module is greater than 1°C.

[0012] Optionally, a mechanical valve is further provided at the discharge port. The mechanical valve is connected in series with the solenoid valve. When the motor is powered on, the solenoid valve is in the closed state. When the motor is powered off, the solenoid valve remains open.

[0013] Optionally, when the motor is powered on, the solenoid valve is in a closed state, and when the motor is powered off, the solenoid valve is in an open state.

[0014] Optionally, the discharge port is arranged on the side wall of the pump body, and the discharge port is located in the upper middle part of the pump body.

[0015] Optionally, a base is fixedly provided on the side of the pump body facing the motor, the motor includes a main body and a rear end cover, and a handle connecting the base and the rear end cover is provided between the base and the rear end cover.

[0016] Optionally, a fan cover is sleeved on the outside of the rear end cover, and one end of the handle is fixed to the rear end cover by a screw, and the screw passes through the fan cover.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. By designing the discharge port and the solenoid valve, after the water pump is used in cold areas, the solenoid valve remains open, so that the residual water in the pump body will not exceed the height of the discharge port. The space in the pump body above the discharge port is sufficient to meet the space required for the residual water to expand when it freezes, thereby ensuring good antifreeze performance. In addition, there is still residual water in the pump body, which is convenient for the next restart of the water pump.

[0019] 2. The solenoid valve is combined with the temperature sensor and controller. When the temperature is higher than the set value, the solenoid valve is kept in a closed state. At this time, there will be no ice, so that the water in the pump body will not be discharged, achieving the purpose of water saving. When the water pump is not powered on, the solenoid valve remains in a normally open state, and still maintains a good antifreeze effect;

[0020] 3. The solenoid valve and the mechanical valve are used in series. In normal temperature mode, the mechanical valve is modulated to the closed state, the solenoid valve is not connected to the circuit, and is in the normally open state. At this time, the discharge port is in the closed state. In low temperature mode, the mechanical valve is opened, the water pump is started, the solenoid valve is energized and is in the closed state, and the discharge port is in the closed state; after the water pump is stopped, the solenoid valve is de-energized and is in the open state, and the discharge port is in the open state. The moisture inside the pump body can be discharged through the discharge port to achieve the corresponding antifreeze effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the overall structural diagram of Example 1.

[0022] Figure 2 It is a structural diagram of Example 1 when the fan cover explodes.

[0023] Figure 3 It is a schematic diagram of the mechanical valve and the solenoid valve in series in Example 3.

[0024] Description of the reference numerals:

[0025] 1. Pump body; 2. Motor; 3. Water inlet; 4. Water outlet; 5. Drain hole; 6. Plugging member; 7. Hand-held strip; 8. Discharge port; 9. Solenoid valve; 10. Body; 11. Rear end cover; 12. Base; 13. Handle; 14. Screw; 15. Fan cover; 16. Perforation; 17. Mechanical valve. Detailed implementation manners

[0026] The following further describes the present application in conjunction with the attached Figures 1-3 drawings in detail.

[0027] An anti-freezing water pump, as Figure 1 shown, includes a pump body 1 and a motor 2. A water inlet 3 and a water outlet 4 are arranged on the pump body 1. A drain hole 5 is opened at the bottom of the pump body 1. A detachable plugging member 6 is arranged at the drain hole 5. The plugging member 6 is threadedly connected to the drain hole 5. A hand-held strip 7 for easy holding protrudes from the plugging member 6. The installation and disassembly of the plugging member 6 can be realized by rotating the hand-held strip 7. When the drain hole 5 is opened, the water in the pump body 1 can be drained completely.

[0028] As Figure 1 shown, a discharge port 8 is further opened on the side wall of the pump body 1. The discharge port 8 is communicated with the inside of the pump body 1. The position of the discharge port 8 is higher than that of the drain hole 5. In this embodiment, the discharge port 8 is located at a position slightly above the middle of the pump body 1. And a solenoid valve 9 is arranged at the discharge port 8. The solenoid valve 9 controls the opening and closing of the discharge port 8. When the water pump is in the open state and working, at this time, the motor 2 is powered on, and the solenoid valve 9 is in the open or closed state; when the water pump is not started and working, the solenoid valve 9 is in the open state. In this way, after the water pump is used in cold regions, the solenoid valve 9 remains open, so that the residual water volume in the pump body 1 does not exceed the height of the discharge port 8. The space in the pump body 1 above the discharge port 8 meets the space required for the volume expansion when the residual water freezes, thus ensuring good anti-freezing performance, and there is still residual water in the pump body 1, which is convenient for the next restart of the water pump.

[0029] As Figure 1 and Figure 2 shown, the motor 2 includes a body 10 and a rear end cover 11. A base 12 is fixedly arranged on one side of the pump body 1 close to the motor 2. A handle 13 connecting the two is arranged between the base 12 and the rear end cover 11. The handle 13 is located above the body 10. Both ends of the handle 13 are respectively connected and fixed to the base 12 and the rear end cover 11 through screws 14, so as to realize the detachable connection of the handle 13. A fan cover 15 is sleeved outside the rear end cover 11. The fan cover 15 can shield and protect the internal fan. A perforation 16 for the screw 14 to pass through is opened on the fan cover 15. When the handle 13 is connected and fixed, the initial fixation of the fan cover 15 is completed synchronously, improving the installation and disassembly efficiency and effectively simplifying the connection structure.

[0030] Example 2

[0031] An anti-freezing water pump, the main difference from Example 1 is that in this example, a temperature sensor is integrally arranged on the solenoid valve 9, and at the same time, a controller is arranged on the motor 2. The controller has a temperature setting module, and the temperature setting module can set the temperature. In this example, the set temperature is 1°C. The temperature sensor can sense the temperature inside the pump body 1. After the water pump is powered on, when the sensed temperature is higher than the set temperature, the controller controls the solenoid valve 9 to be in the closed state after receiving the signal from the temperature sensor; when the sensed temperature is lower than the set temperature, the controller controls the solenoid valve 9 to be in the open state. At this time, the water in the pump body 1 will be discharged from the discharge port 8, and the remaining water in the pump body 1 will not exceed the height of the discharge port 8. The space inside the pump body 1 above the discharge port 8 meets the space required for the volume of the remaining water to expand when it freezes; the control logic is that the water pump is powered on (regardless of whether the water pump starts or not), and it is judged whether the solenoid valve 9 is opened according to the temperature sensing.

[0032] When the water pump is not powered on, that is, when the motor 2 is powered off, at this time, the solenoid valve 9 is in the open state, and the solenoid valve 9 remains in the normally open state.

[0033] Example 3

[0034] An anti-freezing water pump, as Figure 3 shown, the main difference from Example 1 is that a mechanical valve 17 is also arranged at the discharge port 8. The mechanical valve 17 can be a gate valve or a ball valve, etc., and the mechanical valve 17 and the solenoid valve 9 are arranged in series at the discharge port 8, where the mechanical valve 17 is closer to the outside, facilitating the opening and closing operation of it.

[0035] In this example, the water pump is set with a low-temperature mode and a normal-temperature mode:

[0036] Normal-temperature mode, the mechanical valve 17 is adjusted to the closed state, the solenoid valve 9 is not connected to the circuit and is in the normally open state. At this time, the mechanical valve 17 is closed and the solenoid valve 9 is open, and the discharge port 8 is finally in the closed state, and it is used in seasons when there is no possibility of water freezing.

[0037] Low-temperature mode, the mechanical valve 17 is opened, the water pump starts, the solenoid valve 9 is powered on and closed. At this time, the mechanical valve 17 is open and the solenoid valve 9 is closed, and the discharge port 8 is finally in the closed state; after the water pump stops, the solenoid valve 9 loses power and opens. At this time, the mechanical valve 17 is open and the solenoid valve 9 is also open, and the discharge port 8 is finally in the open state, and the water in the pump body 1 flows out from the discharge port 8. It is used in seasons when there is a possibility of water freezing.

[0038] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An anti-freeze water pump, comprising a pump body (1) and a motor (2), characterized in that: A drain hole (5) is provided at the bottom of the pump body (1), a plugging member (6) is provided at the drain hole (5), a discharge port (8) is further provided on the pump body (1), the height of the discharge port (8) is higher than that of the drain hole (5), and a solenoid valve (9) is provided at the discharge port (8).

2. The anti-freezing water pump according to claim 1, wherein: It further includes a controller. The solenoid valve (9) is electrically connected to the motor (2). The controller has a temperature setting module. A temperature sensor is provided in the pump body (1). When the temperature sensed by the temperature sensor is lower than the temperature value set by the temperature setting module, the controller controls the solenoid valve (9) to open.

3. The anti-freezing water pump according to claim 2, wherein: When the motor (2) is powered off, the solenoid valve (9) remains open.

4. The anti-freeze water pump according to claim 2, wherein: The temperature sensor is integrated on the solenoid valve (9).

5. The anti-freezing water pump according to claim 2, characterized in that: The temperature set by the temperature setting module is greater than 1 °C.

6. The anti-freezing water pump according to claim 1, wherein: A mechanical valve (17) is further provided at the discharge port (8). The mechanical valve (17) is connected in series with the solenoid valve (9). When the motor (2) is powered on, the solenoid valve (9) is in a closed state. When the motor (2) is powered off, the solenoid valve (9) remains open.

7. The antifreeze water pump according to claim 1, characterized in that: When the motor (2) is powered on, the solenoid valve (9) is in a closed state. When the motor (2) is powered off, the solenoid valve (9) is in an open state.

8. The anti-freezing water pump according to claim 1, characterized in that: The discharge port (8) is provided on the side wall of the pump body (1), and the discharge port (8) is located at a position slightly above the middle of the pump body (1).

9. The anti-freezing water pump according to claim 1, characterized in that: A base (12) is fixedly provided on one side of the pump body (1) facing the motor (2). The motor (2) includes a body (10) and a rear end cover (11). A handle (13) connecting the two is provided between the base (12) and the rear end cover (11).

10. The anti-freezing water pump according to claim 9, characterized in that: A fan cover (15) is sleeved outside the rear end cover (11). One end of the handle (13) is fixed to the rear end cover (11) by a screw (14), and the screw (14) passes through the fan cover (15).

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