CN103489705B - Float liquid level switch and external water pump with same - Google Patents

Abstract

The invention provides a float liquid level switch and an external water pump with the float liquid level switch, wherein the float liquid level switch includes a float (10) moving vertically and a liquid level switch ( 20), the float (10) has a first position for turning on the liquid level switch (20) and a second position for turning off the liquid level switch (20). The invention effectively solves the problems of high cost, large occupied space and complex structure of the float liquid level switch in the prior art.

Description

Float liquid level switch and external water pump with the float liquid level switch

technical field

The invention relates to the technical field of external water pumps, in particular to a float liquid level switch and an external water pump with the float liquid level switch.

Background technique

In the prior art, electrical appliances such as air conditioners or dehumidifiers are usually equipped with an external water pump, and the water level is monitored by a float liquid level switch in the external water pump. The liquid level switch mainly transmits water level signals through liquid level switches, pressure sensors and other devices. Go to the control device and control the motion device to adjust the water level through the control device. Because the control device includes a controller, it will increase the cost of hardware and software of the float level switch, and the control device with a controller also has the problem of large space occupation and complex structure, which leads to large space occupation and complex structure of the float level switch. .

Contents of the invention

The present invention aims to provide a float liquid level switch and an external water pump with the float liquid level switch, so as to solve the problems of high cost, large occupied space and complex structure of the float liquid level switch in the prior art.

In order to achieve the above object, according to one aspect of the present invention, a float liquid level switch is provided, including a float that moves vertically and a liquid level switch that cooperates with the float, the float has a first position for conducting the liquid level switch and Second position to open the level switch.

Further, the float has a connection through hole extending laterally; the liquid level switch includes a switch body and a connecting piece, the switch body has a conducting contact corresponding to the connecting piece, and the first end of the connecting piece is pivotally connected to the switch body The upper and second ends are installed in the connecting through hole. When the float is in the first position, the middle part of the connecting piece is in contact with the conductive contact to make the liquid level switch conductive. When the float is in the second position, the middle part of the connecting piece is in contact with the conductive contact. The contacts separate to open the level switch.

Further, the vertical distance between the inner walls of the connecting through holes is greater than the thickness of the connecting piece.

Further, the float includes a first cylinder and a second cylinder connected to one end of the first cylinder, the diameter of the second cylinder is smaller than that of the first cylinder, and the end of the second cylinder away from the first cylinder has a connection part, and the connection part is provided with a connection through hole.

Further, the float further includes a stop part arranged on the outer wall of the float for limiting the lowering position of the float, and the stop part extends radially outward.

According to another aspect of the present invention, an external water pump is provided, including a water tank, a partition and a float level switch, the partition is horizontally arranged above the water tank, and the feature is that the float level switch is the above-mentioned float level switch The switch and the liquid level switch are installed on the partition, and the float is arranged in the water tank.

According to another aspect of the present invention, an external water pump is provided, including a water tank, a partition and a float level switch, the partition is horizontally arranged above the water tank, and the feature is that the float level switch is the above-mentioned float level switch The switch, the liquid level switch is installed on the partition, the float is arranged in the water tank, the partition has a guide hole extending vertically, the second cylinder is movably installed in the guide hole, the diameter of the guide hole is smaller than the first The diameter of the barrel.

According to another aspect of the present invention, an external water pump is provided, including a water tank, a partition and a float level switch, the partition is horizontally arranged above the water tank, and the feature is that the float level switch is the above-mentioned float level switch The switch and the liquid level switch are installed on the separator, the float is arranged in the water tank, the separator has a limit plate extending vertically downward, and the limit plate is provided with a limit member that is engaged with the stopper.

Applying the technical solution of the present invention, a float liquid level switch includes a float that moves vertically and a liquid level switch that cooperates with the float. second position. In the float liquid level switch, the float is connected with the liquid level switch. When the float is in the original position under the action of gravity, that is, the second position, the float will disconnect the liquid level switch; When moving upward to the first position, the liquid level switch matched with the float is turned on. In this way, the water level is judged by the longitudinal movement of the float under the action of buoyancy and the water level is monitored by controlling the liquid level switch. Compared with the liquid level switch in the prior art that monitors the water level through a pressure sensor and a controller, the structure is simple and the space occupied is small. , and save some software and hardware, saving production costs.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 shows the structural representation of the embodiment of the float liquid level switch of the present invention;

Fig. 2 shows the internal structure schematic diagram of the embodiment of external water pump of the present invention;

Fig. 3 shows a schematic diagram of the state of the float of the external water pump in Fig. 2 when it is in a second position;

Fig. 4 shows a schematic diagram of the state of the float of the external water pump in Fig. 2 when it is in the first position; and

Fig. 5 shows a schematic diagram of the state of the float of the external water pump in Fig. 2 when it descends a certain distance.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in Figure 1, the float liquid level switch of this embodiment includes a float 10 that moves longitudinally and a liquid level switch 20 that cooperates with the float 10. The second position where the bit switch 20 is off.

In the float liquid level switch of this embodiment, the float is connected with the liquid level switch. When the float is in the original position under the action of gravity, that is, the second position, the float disconnects the liquid level switch; When moving upward, when the float moves upward to the first position, the liquid level switch matched with the float is turned on. In this way, the water level is judged by the longitudinal movement of the float under the action of buoyancy and the water level is monitored by controlling the liquid level switch. Compared with the liquid level switch in the prior art that monitors the water level through a pressure sensor and a controller, the structure is simple and the space occupied is small. , and save some software and hardware, saving production costs.

Preferably, the float 10 has a connection through hole 11 extending laterally; the liquid level switch 20 includes a switch body 21 and a connecting piece 23, the switch body 21 has a conductive contact corresponding to the middle of the connecting piece 23, and the first connecting piece 23 One end is pivotally connected to the switch body 21, and the second end is passed through the connection through hole 11. When the float 10 is in the first position, the middle part of the connecting piece 23 contacts the conducting contact to make the liquid level switch 20 conduct. When the float 10 is in the second position, the middle part of the connecting piece 23 is separated from the conduction contact so that the liquid level switch 20 is disconnected.

Wherein, it needs to be specially explained that the second end of the connecting piece 23 penetrates into the connecting through hole 11 includes two kinds of passing ways, the first way of passing through is that the second end of the connecting piece 23 completely passes through the connecting through hole 11; The second piercing method is that the second end of the connecting piece 23 penetrates into the connecting through hole 11; these two kinds of piercing methods can achieve the connection effect between the connecting piece 23 and the connecting through hole 11. In this embodiment, the connecting piece 23 The first threading method is adopted, see Figure 1 for details.

Preferably, the vertical distance between the inner walls of the connecting through holes 11 is greater than the thickness of the connecting piece 23 . In the float liquid level switch of this embodiment, the connecting through hole 11 is a circular through hole, that is, the diameter of the connecting through hole 11 is larger than the thickness of the connecting piece 23 . With this arrangement, the effect of not driving the connecting piece 23 will be achieved when the float 10 rises or falls for a certain distance. Refer to Fig. 3 to Fig. 5 for details about the process of the float 10 descending, and the more specific effect is: when the float 10 moves vertically upwards to the first position under the action of buoyancy, the liquid level switch 20 is turned on, and when the liquid level switch 20 is turned on, generally The drainage pump runs to discharge the excess water, and the float drops accordingly when the water level drops. Since the diameter of the connecting hole 11 is greater than the thickness of the connecting piece 23, when the float drops to the point where the connecting piece 23 contacts the uppermost inner wall of the connecting through hole 11 , the connecting piece 23 is driven by the float 10 and the middle part of the connecting piece 23 is separated from the conduction contact, and finally the liquid level switch 20 is disconnected. By connecting the difference between the through hole 11 and the connection piece 23, the problem of frequent conduction and disconnection of the liquid level switch 20 caused by the small movement of the connection piece 23 due to the slight movement of the float 10 is avoided, and the length of the liquid level switch and drainage is extended. pump life.

Preferably, the specific structure of the float liquid level switch of this embodiment is as follows: the float 10 includes a first cylinder 13 and a second cylinder 15 connected to one end of the first cylinder 13, and the diameter of the second cylinder 15 is smaller than that of the first cylinder 13. The diameter of the cylinder 13, the end of the second cylinder 15 away from the first cylinder has a connecting portion, and the connecting portion is provided with a connecting through hole 11 . The float 10 also includes a stop portion 17 disposed on the outer wall of the float 10 , and the stop portion 17 extends radially outward.

The present invention also provides an embodiment of an external water pump, specifically referring to Fig. 2 to Fig. 5 , the external water pump includes a water tank 31, a partition 33 and the float liquid level switch of the above embodiment, and the partition 33 is horizontally arranged above the water tank 31 , the liquid level switch 20 is installed on the partition 33 , and the float 10 is arranged in the water tank 31 . The separator 33 has a guide hole, and the second cylinder body 15 is movably penetrated in the guide hole, and the diameter of the guide hole is smaller than that of the first cylinder body 13 . The partition plate 33 has a limiting plate extending vertically downward, and a limiting member is provided on the limiting plate to snap fit with the stopper portion 17 .

Wherein, through the cooperation of the second cylinder 15 and the guide hole, the float 10 can move vertically upwards or downwards without causing deviation, avoiding inaccurate water level monitoring and the problem that the connecting piece 23 slips out of the connecting through hole 11 question. When the float 10 moves vertically downwards under the influence of gravity to the stopper 17 and the stopper, it stops moving downwards, so that the second cylinder 15 of the float 10 will not slip out of the guide when there is no water in the water tank. hole.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. a float liquid level switch, it is characterised in that include the float (10) vertically moved and join with described float (10) The liquid-level switch (20) closed, described float (10) has the primary importance making described liquid-level switch (20) turn on and makes described liquid level The second position that switch (20) disconnects,

Described float (10) has the connection through hole (11) extended transversely；

Described liquid-level switch (20) includes Switch main body (21) and connects sheet (23), and described Switch main body (21) has corresponding to institute Stating the conducting contact connecting sheet (23), the first end of described connection sheet (23) is pivotably coupled to described Switch main body (21) Upper, the second end is located in described connection through hole (11), and described float (10) is positioned at described connection sheet (23) during primary importance Middle part with described conducting contact so that described liquid-level switch (20) conducting, described in when described float (10) is positioned at the second position Connect middle part and the described conducting contact separation of sheet (23) so that described liquid-level switch (20) disconnects,

Described float (10) includes the first cylinder (13) and is connected to second cylinder (15) of described first cylinder (13) one end, institute Stating the diameter diameter less than described first cylinder (13) of the second cylinder (15), described second cylinder (15) is away from described first One end of body has connecting portion, and described connecting portion is provided with described connection through hole (11).

Float liquid level switch the most according to claim 1, it is characterised in that the inwall of described connection through hole (11) is vertically Spacing more than the thickness of described connection sheet (23).

Float liquid level switch the most according to claim 1, it is characterised in that described float (10) also includes being arranged on described Being used on the outer wall of float (10) limits the stopper section (17) of the down position of described float (10), described stopper section (17) edge Extend radially outwardly.

4. an external water pump (30), including water tank (31), dividing plate (33) and float liquid level switch, described dividing plate (33) level sets Put the top in described water tank (31), it is characterised in that described float liquid level switch is according to any one of claims 1 to 3 Float liquid level switch, described liquid-level switch (20) is arranged on described dividing plate (33), and described float (10) is arranged on water tank (31) in.

5. an external water pump (30), including water tank (31), dividing plate (33) and float liquid level switch, described dividing plate (33) level sets Put the top in described water tank (31), it is characterised in that described float liquid level switch is that the float liquid level described in claim 1 is opened Closing, described liquid-level switch (20) is arranged on described dividing plate (33), and described float (10) is arranged in water tank (31), described dividing plate (33) having the pilot hole vertically extended, described second cylinder (15) is located in described pilot hole movably, institute State the diameter diameter less than described first cylinder (13) of pilot hole.

6. an external water pump (30), including water tank (31), dividing plate (33) and float liquid level switch, described dividing plate (33) level sets Put the top in described water tank (31), it is characterised in that described float liquid level switch is that the float liquid level described in claim 3 is opened Closing, described liquid-level switch (20) is arranged on described dividing plate (33), and described float (10) is arranged in water tank (31), described dividing plate (33) there is the limiting plate extended towards vertically downward direction, described limiting plate is provided with and described stopper section (17) clamping matching Locating part.