JPH0136677Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a liquid supply device for supplying washer liquid to, for example, a windshield or a rear glass of an automobile.

[Conventional technology]

Conventionally, as a device for supplying washer fluid to the windshield or rear glass of an automobile, a front switch 10, the circuit configuration of which is shown in FIG.
Alternatively, by pressing the rear switch 11, the washer pump 3' is operated, and the switching valve parts 50A ₁ and 50A ₂ of the solenoid valve 50 for waterway switching are switched to the windshield side or the rear glass side, and the washer liquid is transferred to the windshield side or the rear glass side. It was being supplied to the rear window.

[The problem that the idea attempts to solve]

However, this conventional product requires a separate electromagnetic valve 50 for switching water channels in addition to the washer pump 3', which increases wiring and piping, leading to increased costs.

[Means to solve the problem]

A first liquid passage for supplying liquid is provided on one side in the axial direction, a dividing wall that protrudes inward is disposed at the center on the outer peripheral side, and second and third passages for discharging are arranged on the left and right sides of the partition wall. A case provided with a liquid passage, a check valve attached to a valve seat provided near the entrance of the second and third liquid passages so as to be openable and closable, and a motor located on the other side of the case as a drive source. a rotor that is rotatably housed in the case facing the first liquid passage, has an interior and an exterior communicated with the liquid passage, and has a plurality of blades formed in the radial direction on its outer periphery; A switch means for rotating the rotor forward or reverse, selectively communicating the first liquid passageway with either the second or third liquid passageway by rotating the rotor forward or reversely. This method was adopted.

Therefore, the present invention was developed in view of the above points, and by rotating the rotor of one pump in the forward or reverse direction to create negative pressure inside the case, the liquid passage is changed from the liquid supply side to the discharge side. It is an object of the present invention to provide an inexpensive liquid supply device that can easily switch between two directions, and does not require a conventional solenoid valve for switching a flow path.

〔Example〕

The details of the present invention will be explained below with reference to FIGS. 1 to 3, using a washing fluid supply device for an automobile as an embodiment.

Reference numeral 1 denotes a substantially cylindrical rotor that is rotatably supported in a sealed case 2 and has an opening 1A on one side and a closed wall 1B on the other side. The motor shaft 3A of the motor 3 located at is fitted into the bearing portion _1B1 , thereby being rotationally driven. A plurality of blades 4 are formed in the radial direction on the outer periphery of the rotor 1, and the blades 4 are formed so as to be rotatable with a slight distance from the partition wall 2A of the case 2, which will be described later. Ru. 5
is a first liquid supply pipe formed on one side of the case 2 in the axial direction, facing the opening 1A of the rotor 1;
The liquid passage 5 is connected to a tank (not shown) containing washer liquid, and the washer liquid from the liquid passage 5 communicates with the outer periphery of the rotor 1 between the blades 4 from inside to outside. It is designed to be supplied into the motor 2 from outside the rotor 1 through the supply hole _1A1 opened in this manner. 6 and 7 are on the left and right sides (front stage and rear stage) of the outer periphery of the case 2, with the partition wall 2A projecting inwardly of the case 2 as the center.
The second and third liquid passages 6 and 7 are provided in the liquid passages 6 and 7 for discharge, and the second and third liquid passages 6 and 7 can communicate with the first liquid passage 5. 8 and 9 are the second,
Valve seat 6 provided near the inlet in the third liquid passages 6 and 7
This is a check valve attached to A and 7A.

Further, in FIG. 3, 10 is a front washer switch as a first switch means, 11 is a rear washer switch as a second switch means, and the motor 3 is connected to the front washer switch 10 and the front washer switch 11 as a second switch means. It is connected to movable contacts 12 and 13 of the rear watch switch 11, respectively. 14, 15, 16, and 17 are fixed contacts from which the movable contacts 12 and 13 can be separated. Either of the fixed contacts 15, 17 is grounded. When the movable contact 12 of the front washer switch 10 is switched to the fixed contact 14 side, the motor 3 rotates forward, and the movable contact 13 of the rear washer switch 11 is switched to the fixed contact 14 side.
If the switch is switched to the fixed contact 16 side, the motor 3 rotates in reverse.

One embodiment of the present invention has the above-mentioned configuration, and if the movable contact 12 of the front watch switch 10 as the first switching means is switched to the fixed contact 14 side, the motor 3 is energized. As a result, the rotor 1 is rotated at high speed in the normal rotation direction (counterclockwise when viewed from the motor 3 side). When the rotor 1 rotates in the forward direction, the washer fluid flows into the case 2, which has a negative pressure, through the first liquid passage 5 and the supply hole 1 of the rotor 1.
It flows through A ₁ due to centrifugal force. A check valve 8 is mounted in a valve seat 6A of a second passage 6 provided on the outer peripheral surface of the case 2, corresponding to the rotational direction of the rotor 1, and located upstream of the partition wall 2A protruding into the case 2. is opened by the washer fluid pressurized by several vanes 4 provided on the outer periphery of the rotor 1, so that the washer fluid flows out from the second passage 6 toward the windshield. At this time, the check valve 9 installed in the valve seat 7A of the third passage 7 located after the partition wall 2A
When the washer fluid flows out into the second passage 6, the area around the valve seat 7A in the case 2 suddenly becomes negative pressure, so that it is sucked into the valve seat 7A and closed.

Furthermore, when the rotor 1 rotates in reverse at high speed, the washer fluid flows into the case 2 which has become under negative pressure from the first liquid passage 5, and the partition wall 2A protrudes into the case 2 corresponding to the rotational direction of the rotor 1. A third passage 7 provided on the outer peripheral surface of the case 2 located at the front stage (front) of the case 2.
The check valve 9 installed in the valve seat 7A is then further pressurized and opened by the washer liquid pressed by several blades 4 provided on the outer periphery of the rotor 1, and the washer liquid flows into the third passage. 7 and leaks out to the rear glass side. At this time, the check valve 8 installed in the valve seat 6A of the second passage 6 located downstream of the partition wall 2A in accordance with the rotational direction of the rotor 1 prevents the washer liquid from flowing out from the third passage 7. As a result, the vicinity of the valve seat 6A in the case 2 becomes negative pressure, so that it is sucked and closed.

In this embodiment, the liquid supplied by rotating the rotor 1 has been described as an apparatus for supplying it as a washer liquid for an automobile, but the liquid to be supplied is not limited to this.

[Effects of the invention] As described above, the present invention rotates the rotor of one pump in the forward or reverse direction by turning on the first or second switch, thereby selectively opening the second or third liquid passage on the discharge side. The valve can be opened to supply liquid.

In addition, the present invention has a simple structure in which a rotor driven by a motor is housed in a case, and a few liquid passages and a check valve are installed inside the case. Since no solenoid valve or piping is required, manufacturing and assembly are easy and the cost is low.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view showing an embodiment of the liquid supply device of the present invention, and FIG.
3 is a circuit diagram, and FIG. 4 is a circuit diagram showing an example of a conventional washing machine for an automobile. DESCRIPTION OF SYMBOLS 1... Rotor, 2... Case, 2A... Division wall, 3... Motor, 4... Vane, 5... First liquid passage, 6... Second liquid passage, 7... Third 3, liquid passage, 10...front watch switch, 11
...Rear watch switch.

Claims (1)

[Scope of utility model registration request] A first liquid passage for supplying liquid is provided on one side in the axial direction, a dividing wall that protrudes inward is disposed at the center on the outer peripheral side, and second and third passages for discharging are arranged on the left and right sides of the partition wall. A case provided with a liquid passage, a check valve attached to a valve seat provided near the entrance of the second and third liquid passages so as to be openable and closable, and a motor located on the other side of the case as a drive source. a rotor that is rotatably housed in the case facing the first liquid passage, has an interior and an exterior communicated with the liquid passage, and has a plurality of blades formed in the radial direction on its outer periphery; A switch means for rotating the rotor forward or reverse, selectively communicating the first liquid passageway with either the second or third liquid passageway by rotating the rotor forward or reversely. A liquid supply device characterized by: