JPH0153060B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Application) The present invention provides a forced drainage type vacuum cleaner that is equipped with a check valve and a communication pipe to enable continuous drainage operation, and is capable of simultaneously suctioning and discharging sewage, etc. It is related to.

(Prior Art) Conventionally, electric suction type vacuum cleaners have been known that are equipped with a drainage pump to forcibly discharge sewage sucked into a tank. This has the advantage that, after cleaning the floor of a building, etc., the sewage can be sucked into the tank and the sewage, etc. that has been sucked in the tank can be discharged to a predetermined location at the same time.

(Problems to be Solved) By the way, for example, when the tank is empty after forced drainage of sewage, etc. in the tank and the drain pump is stopped, the pressure inside the tank is lower than that of the outside air. Therefore, in a conventional vacuum cleaner, outside air is forced into the drain pump through the bidirectional discharge path for sewage, etc. the result,
Next, when the drain pump was operated to discharge sewage, etc., it became impossible to drain the water, and the drain pump had to be primed again to drain the water, which caused the problem that the vacuum cleaner could not be operated continuously.

(Means for Solving Problems) The present invention was made with the aim of overcoming the above-mentioned problems, and provides a continuous drainage operation that does not require priming by providing a check valve and a communication pipe at a predetermined part of the vacuum cleaner. The present invention provides an electric suction type vacuum cleaner that can be used.

That is, the electric suction type vacuum cleaner of the present invention is provided with a check valve in the wastewater discharge path of the drainage pump that forcibly discharges collected wastewater by sucking it into the tank of the vacuum cleaner through a suction pipe, etc. It consists of a communicating pipe that makes the pressure inside the tank and the inside of the drainage pump the same.

(Example) The present invention will be explained with reference to an example shown in the drawings.

The electric suction type vacuum cleaner of the embodiment has a main body consisting of a head (not shown) housing a motor that generates suction power, an intermediate part (not shown) containing a built-in filter, and a tank 1 forming a bottom part. The drain pump 2 is attached to the side of the drain pump. The drainage pump communicates with the tank via a pipe 3, and is configured to forcibly drain the sewage and the like collected in the tank.

The reference numeral 16 designates a perforated plate provided at the bottom of the tank, which is used to separate large debris contained in the sucked sewage to prevent breakdown of the drainage pump. A drain path provided at the drain port 4 of the drain pump consists of a check valve 5 and a drain pipe 6.
In the embodiment, the check valve 5 is fixed directly to the drain port 4 of the drain pump, but in the present invention it may be provided anywhere along the drain path.

In addition, in the embodiment, the communication pipe 8 that makes the inside of the tank 1 and the inside of the drainage pump 2 have the same pressure is the upper opening 1a of the tank.
and the lower opening 5b of the check valve.

(Function) The suction and forced drainage of sewage etc. by the electric suction type vacuum cleaner of the present invention is performed as follows. That is, sewage, etc. is sucked into the tank 1 through a suction pipe (not shown), etc., and the sewage, etc. collected in the tank is led to the drainage pump 2 through the pipe 3, and the sewage, etc. is discharged through the drainage pump. is forced to drain through the discharge channel.

At this time, in the embodiment of the present invention, the sewage etc. sent out from the drain port 4 of the drain pump lifts the ball 5a of the check valve and presses it against the end of the drain pipe. Subsequently, sewage or the like flows into the drain pipe through the hole 7 formed at the end of the drain pipe and is discharged to the outside through this pipe. In this way, sewage or the like is sucked into the tank and at the same time its forced drainage is achieved.

On the other hand, when the forced drainage of sewage, etc. in the tank 1 is completed, the suction operation of the vacuum cleaner and the discharge operation of the drain pump 2 are stopped, but at this time, the pressure inside the tank 1 is more negative than that of the discharge route. . However, the external pressure on the drain pipe side pushes down the ball 5a of the check valve, which blocks the drain path, so the outside air (arrow)
is prevented from flowing into the drain pump 2. Also,
At the same time, the pressure inside the tank 1 and inside the drain pump are automatically adjusted via the communication pipe 8, so that the pressure becomes the same.
As the pressure inside the tank becomes the same as the outside pressure via the suction pipe, the pressure on the drainage pump side also becomes the same as the outside pressure.

(Effects of the Invention) According to the present invention, a check valve is provided to prevent outside air from flowing into the drainage pump, and the inside of the tank and the inside of the drainage pump are made to have the same pressure through the communication pipe.
Furthermore, since the pressure on the drain pump side is set to be the same as the external pressure, the drain pump is prevented from becoming incapable of draining water, and continuous draining operation of the vacuum cleaner becomes possible.

Another advantage is that cleaning can be done more efficiently since priming is not required.

[Brief explanation of drawings]

The figure is an explanatory partial cross-sectional view of an embodiment of the present invention. 1... Tank, 2... Drain pump, 3... Pipe, 5... Check valve, 6... Drain pipe, 8... Communication pipe.

Claims (1)

[Scope of Claims] 1. In an electric suction vacuum cleaner that is equipped with a drainage pump to forcibly discharge sewage sucked into a tank, the sewage discharge route of the drainage pump is provided with a connection to the pump. This forced drain type vacuum cleaner is equipped with a check valve to prevent outside air from being forced in, and is also equipped with a communication pipe that maintains the same pressure in the tank and drain pump, allowing for continuous drain operation.