Mechanical level float switch device

Abstract

This utility model discloses a mechanical liquid level float switch device, including a liquid storage chamber with a liquid inlet channel. A solenoid valve is installed on the outside of the liquid inlet channel, and a liquid level float switch assembly is installed on the inside of the liquid inlet channel. The liquid level float switch assembly includes a liquid inlet cavity, a float base that can move up and down relative to the liquid inlet cavity, and a float body installed on the top of the float base. A cover is installed at the opening end of the liquid inlet cavity, and a liquid outlet is provided on the cover. A sealing assembly for sealing the liquid outlet is provided between the float base and the cover. This utility model sets a liquid level float switch assembly that can rise and fall with the liquid level in the liquid storage chamber, and automatically controls the opening and closing of the liquid outlet through the sealing assembly. The structure is simple, reliable, and versatile.

Description

Technical Field

[0001] This utility model belongs to the field of float switch technology, specifically relating to a mechanical liquid level float switch device. Background Technology

[0002] Currently, home appliances using water-based systems are becoming increasingly common, and there are many types of appliances with liquid storage chambers, such as steam ovens, water purifiers, air humidifiers, and robot vacuum cleaners. A patent with publication number CN222507450U discloses a liquid level float switch, comprising: a housing with an internal cavity; an anti-reverse groove located inside the housing; a mounting bracket inserted into the anti-reverse groove, with a storage area inside the bracket; a steel ball disposed within the storage area; a counterweight iron pellet disposed inside the housing; a micro switch located at the top of the mounting bracket, with its cable passing through the counterweight iron pellet and the bottom of the housing; a waterproof cover covering the mounting bracket and the micro switch, and inserted into the counterweight iron pellet; and epoxy resin binding the waterproof cover, counterweight iron pellet, mounting bracket, and housing together. Existing float switches rely on microswitches for control, requiring circuit connection and corresponding control programs. If the microswitch fails, the entire float switch malfunctions, potentially causing the reservoir to overflow and leak. Furthermore, existing float switches are bulky and cannot be easily installed in household appliances, resulting in poor versatility. Therefore, a mechanical level float switch device is needed to overcome these difficulties. Summary of the Invention

[0003] This invention addresses the problems existing in the prior art by designing a mechanical liquid level float switch device. This invention sets up a liquid level float switch assembly in the liquid storage chamber that can rise and fall with the liquid level. The opening and closing of the liquid outlet is automatically controlled by the sealing assembly. The structure is simple, reliable, and has good versatility.

[0004] The objective of this invention is achieved through the following technical solution: a mechanical liquid level float switch device, comprising a liquid storage chamber, an inlet channel on the liquid storage chamber, a solenoid valve installed on the outside of the inlet channel, and a liquid level float switch assembly installed on the inside of the inlet channel; the liquid level float switch assembly includes an inlet cavity, a float base that can move up and down relative to it is provided in the inlet cavity, and a float body is installed on the top of the float base; a cover is installed at the opening end of the inlet cavity, and an outlet is provided on the cover; a sealing assembly for sealing the outlet is provided between the float base and the cover.

[0005] Preferably, the liquid inlet chamber is connected to the liquid inlet channel, and a first sealing element for sealing is provided between the liquid inlet chamber and the liquid inlet channel; a second sealing element for sealing is provided between the solenoid valve and the liquid inlet channel.

[0006] Preferably, the liquid inlet chamber is provided with a cover that is snapped together with it, and a third sealing element for sealing is provided between the cover and the liquid inlet chamber.

[0007] Preferably, the opening end of the liquid inlet chamber is provided with an installation step, and when the cover is fitted to the liquid inlet chamber, the third sealing element is fitted to the installation step.

[0008] Preferably, the float base is prismatic, and the bottom of the liquid inlet cavity is provided with a guide groove, and the float base is slidably installed in the guide groove; the outer contour of the float base is adapted to the outer contour of the guide groove.

[0009] By incorporating the first and second seals, a better seal is achieved between the inlet chamber, the inlet channel, and the solenoid valve, preventing liquid leakage. A third seal between the cover and the inlet chamber ensures the overall sealing of the inlet chamber, allowing liquid to enter and exit only through the outlet of the cover. An installation step further secures the third seal. A guide groove allows the float base to move up and down along the axial direction of the groove, ensuring the fourth seal effectively blocks the outlet.

[0010] Preferably, the sealing assembly includes a mounting groove and a fourth seal; the float base is provided with a mounting groove, and the fourth seal is provided in the mounting groove; the inner wall of the cover is provided with a conical groove, and when the outer wall of the mounting groove is close to the cover, the fourth seal abuts against the inclined end face of the conical groove.

[0011] A fourth seal is installed within the mounting groove. As the float rises and falls with the liquid level, it moves the fourth seal up and down, allowing it to move closer to or further away from the inclined end face of the conical groove, thus facilitating control of the outlet's opening and closing. When the solenoid valve is energized, liquid is added to the storage chamber through the inlet channel. Initially, the liquid level in the storage chamber is low. Under gravity, the float base and float body position the fourth seal at the lower end of the inlet chamber, ensuring continuity between the inlet channel and the outlet, allowing continuous liquid intake. As liquid intake continues, the liquid level in the storage chamber rises. The float body floats upwards under buoyancy, causing the fourth seal to move closer to the outlet. This fourth seal is an O-ring. When the fourth seal is near the outlet, the liquid flow decreases; the pressure in the inlet chamber increases, transmitted to the mounting groove, causing the O-ring to deform. Ultimately, the fourth seal engages with the conical groove to seal the cover and close the outlet. When the solenoid valve is de-energized, the pressure in the inlet channel disappears, and the pressure in the inlet chamber also decreases; the liquid in the storage chamber will be used, and the liquid level in the storage chamber will drop; when the liquid level is lower than the float body, the float body and float base will return to their initial state under the action of gravity, and the outlet will reopen.

[0012] Preferably, the sealing assembly includes a conical protrusion and a fourth seal; the float base is provided with a conical protrusion, and the inner wall of the cover is installed with a fourth seal; when the conical protrusion is close to the cover, the inclined end face of the conical protrusion abuts against the fourth seal.

[0013] Preferably, the cover is snapped to the liquid inlet chamber, and the opening end of the liquid inlet chamber is provided with a limiting rib; when the cover and the liquid inlet chamber are fitted together, the limiting rib abuts against the fourth sealing element.

[0014] The fourth seal here is press-fitted into the inner wall of the cover and then limited by the limiting rib on the liquid inlet cavity, so that the fourth seal can be firmly installed on the cover. In the default state, the liquid outlet of the cover is in the open state. When the liquid level in the liquid storage chamber rises, the float body drives the float base to rise. When the float base rises, it drives the conical protrusion to approach the fourth seal, so that the fourth seal and the conical protrusion seal each other, thereby closing the liquid outlet. When the liquid level in the liquid storage chamber drops, the float base automatically resets, and the conical protrusion moves away from the fourth seal, and the liquid outlet reopens.

[0015] Compared with existing technologies, this utility model has the following advantages: 1. By controlling the opening and closing of the liquid outlet through changes in liquid level, the sealing component automatically controls the opening and closing of the liquid outlet without the need for a power source, making the structure more stable and reliable; 2. The liquid level float switch component is small in size, simple in structure, and can be adapted to various household appliances, exhibiting good versatility; 3. The inlet chamber is an entirely sealed space, allowing for a wider range of inlet pressure adaptability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the liquid level float switch assembly; Figure 2 A schematic diagram of a structure where the liquid storage chamber is at a low liquid level and the liquid outlet is open; Figure 3 A schematic diagram showing the liquid storage chamber at a high liquid level and the liquid outlet in a closed state; Figure 4 This is a schematic diagram of the structure of the second embodiment; The diagram shows the following markings: 1. Liquid storage chamber; 2. Liquid inlet channel; 3. Solenoid valve; 4. Liquid level float switch assembly; 41. Liquid inlet body; 42. Float base; 43. Float body; 44. Cover; 5. Sealing assembly; 51. Mounting groove; 52. Fourth seal; 53. Conical protrusion; 6. First seal; 7. Second seal; 8. Third seal; 9. Mounting step; 10. Guide groove; 11. Conical groove; 12. Limiting rib; 13. Liquid outlet. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: Example 1 like Figures 1 to 3 As shown, this embodiment discloses a mechanical liquid level float switch device, including a liquid storage chamber 1, a liquid inlet channel 2 on the liquid storage chamber 1, a solenoid valve 3 installed on the outside of the liquid inlet channel 2, and a liquid level float switch assembly 4 installed on the inside of the liquid inlet channel 2; the liquid level float switch assembly 4 includes a liquid inlet cavity 41, a float base 42 that can move up and down relative to it is provided in the liquid inlet cavity 41, and a float body 43 is installed on the top of the float base 42; a cover 44 is installed at the open end of the liquid inlet cavity 41, and a liquid outlet 13 is provided on the cover 44; a sealing assembly 5 for sealing the liquid outlet 13 is provided between the float base 42 and the cover 44.

[0018] The inlet chamber 41 is connected to the inlet channel 2, and a first sealing element 6 is provided between the inlet chamber 41 and the inlet channel 2 for sealing; a second sealing element 7 is provided between the solenoid valve 3 and the inlet channel 2 for sealing. The inlet chamber 41 is provided with a cover 44 that is snapped together with it, and a third sealing element 8 is provided between the cover 44 and the inlet chamber 41 for sealing. The open end of the inlet chamber 41 is provided with an installation step 9, and when the cover 44 is fitted into the inlet chamber 41, the third sealing element 8 is fitted onto the installation step 9.

[0019] The inlet chamber 41 has an installation step 9 at its open end. When the cover 44 is fitted to the inlet chamber 41, the third sealing element 8 is fitted to the installation step 9. The sealing assembly 5 includes an installation groove 51 and a fourth sealing element 52. The float base 42 has an installation groove 51, and the fourth sealing element 52 is provided inside the installation groove 51. The inner wall of the cover 44 has a conical groove 11. When the outer wall of the installation groove 51 is close to the cover 44, the fourth sealing element 52 abuts against the inclined end face of the conical groove 11.

[0020] The specific operation process of this embodiment is as follows: By setting the first sealing element 6 and the second sealing element 7, the liquid inlet chamber 41, the liquid inlet channel 2, and the solenoid valve 3 have better sealing performance, preventing liquid leakage. By setting the third sealing element 8 between the cover 44 and the liquid inlet chamber 41, the overall sealing performance of the liquid inlet chamber 41 is ensured, and liquid can only enter and exit from the liquid outlet 13 of the cover 44. By setting the installation step 9, the third sealing element 8 is installed more firmly. By setting the guide groove 10, the float base 42 can move up and down along the axial direction of the guide groove 10, thereby ensuring that the fourth sealing element 52 can block the liquid outlet 13.

[0021] Here, a fourth seal 52 is installed in the mounting groove 51. When the float body 43 rises and falls with the liquid level, it drives the fourth seal 52 to rise and fall, allowing the fourth seal 52 to move closer to or further away from the inclined end face of the conical groove 11, thus facilitating control of the opening and closing of the outlet 13. When the solenoid valve 3 is energized, liquid can be added to the storage chamber 1 through the inlet channel 2. Initially, the liquid level in the storage chamber 1 is low. Under the influence of gravity, the float base 42 and the float body 43 position the fourth seal 52 at the lower end of the inlet chamber 41, thus connecting the inlet channel 2 and the outlet 13, allowing continuous liquid intake into the storage chamber 1. After continuous liquid intake, the liquid level in the storage chamber 1 continues to rise; the float body 43 floats upwards under buoyancy, at which point the fourth seal 52 will be positioned closer to the outlet 13. The fourth seal 52 here is an O-ring. When the fourth seal 52 is close to the liquid outlet 13, the liquid flow from the liquid outlet 13 decreases; the pressure inside the liquid inlet chamber 41 increases, and the pressure is transmitted to the mounting groove 51, causing the O-ring to deform. Finally, the fourth seal 52 cooperates with the conical groove 11 to seal the cover 44, and the liquid outlet 13 is closed. When the solenoid valve 3 is de-energized, the pressure in the liquid inlet channel 2 disappears, and the pressure inside the liquid inlet chamber 41 also decreases; the liquid in the storage chamber 1 will be used, and the liquid level in the storage chamber 1 will drop; when the liquid level is lower than the float body 43, the float body 43 and the float base 42 return to their initial state under the action of gravity, and the liquid outlet 13 will reopen.

[0022] Example 2 like Figure 4 As shown, the sealing component 5 in this embodiment differs from that in Embodiment 1, but the other structures are the same as in Embodiment 1. The sealing component 5 includes a conical protrusion 53 and a fourth sealing element 52. The float base 42 is provided with a conical protrusion 53, and the inner wall of the cover 44 is equipped with a fourth sealing element 52. When the conical protrusion 53 is close to the cover 44, the inclined end face of the conical protrusion 53 abuts against the fourth sealing element 52. The cover 44 is snap-fitted to the liquid inlet chamber 41, and the opening end of the liquid inlet chamber 41 is provided with a limiting rib 12. When the cover 44 and the liquid inlet chamber 41 are fitted together, the limiting rib 12 abuts against the fourth sealing element 52.

[0023] The fourth seal 52 is press-fitted with the inner wall of the cover 44 and then limited by the limiting rib 12 on the liquid inlet chamber 41, so that the fourth seal 52 can be firmly installed on the cover 44. In the default state, the liquid outlet 13 of the cover 44 is in the open state. When the liquid level in the liquid storage chamber 1 rises, the float body 43 drives the float base 42 to rise. When the float base 42 rises, it drives the conical protrusion 53 to approach the fourth seal 52, so that the fourth seal 52 and the conical protrusion 53 seal each other, thereby closing the liquid outlet 13. When the liquid level in the liquid storage chamber 1 drops, the float base 42 automatically resets, and the conical protrusion 53 moves away from the fourth seal 52, and the liquid outlet 13 reopens.

[0024] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A mechanical liquid level float switch device comprising a liquid storage chamber (1), characterized in that, A liquid inlet channel (2) is provided on the liquid storage chamber (1). A solenoid valve (3) is installed on the outside of the liquid inlet channel (2). A liquid level float switch assembly (4) is installed on the inside of the liquid inlet channel (2). The liquid level float switch assembly (4) includes a liquid inlet chamber (41). A float base (42) that can move up and down relative to the liquid inlet chamber (41) is provided in the liquid inlet chamber (41). A float body (43) is installed on the top of the float base (42). A cover (44) is installed at the opening end of the liquid inlet chamber (41). An outlet (13) is provided on the cover (44). A sealing assembly (5) for sealing the outlet (13) is provided between the float base (42) and the cover (44).

2. The mechanical liquid level float and switch assembly of claim 1, wherein, The liquid inlet chamber (41) is connected to the liquid inlet channel (2), and a first sealing element (6) for sealing is provided between the liquid inlet chamber (41) and the liquid inlet channel (2); a second sealing element (7) for sealing is provided between the solenoid valve (3) and the liquid inlet channel (2).

3. The mechanical liquid level float and switch assembly of claim 1, wherein, The liquid inlet chamber (41) is provided with a cover (44) that is snapped to it, and a third sealing element (8) for sealing is provided between the cover (44) and the liquid inlet chamber (41).

4. The mechanical liquid level float and switch assembly of claim 2, wherein, The opening end of the liquid inlet chamber (41) is provided with an installation step (9). When the cover (44) is fitted and installed in close contact with the liquid inlet chamber (41), the third sealing element (8) is fitted and installed on the installation step (9).

5. The mechanical liquid level float and switch assembly of claim 1, wherein, The float base (42) is prismatic, and the bottom of the liquid inlet cavity (41) is provided with a guide groove (10). The float base (42) is slidably installed in the guide groove (10). The outer contour of the float base (42) is adapted to the outer contour of the guide groove (10).

6. The mechanical liquid level float and switch assembly of claim 1, wherein, The sealing assembly (5) includes a mounting groove (51) and a fourth seal (52); the float base (42) is provided with a mounting groove (51), and the fourth seal (52) is provided in the mounting groove (51); the inner wall of the cover (44) is provided with a conical groove (11), and when the outer wall of the mounting groove (51) is close to the cover (44), the fourth seal (52) abuts against the inclined end face of the conical groove (11).

7. The mechanical liquid level float and switch assembly of claim 1, wherein, The sealing assembly (5) includes a conical protrusion (53) and a fourth seal (52); the float base (42) is provided with a conical protrusion (53), and the inner wall of the cover (44) is equipped with a fourth seal (52). When the conical protrusion (53) is close to the cover (44), the inclined end face of the conical protrusion (53) abuts against the fourth seal (52).

8. The mechanical liquid level float and switch assembly of claim 7, wherein, The cover (44) is snapped to the liquid inlet chamber (41), and the opening end of the liquid inlet chamber (41) is provided with a limiting rib (12); when the cover (44) and the liquid inlet chamber (41) are fitted together, the limiting rib (12) abuts against the fourth sealing element (52).

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