JPH064952Y2 - Freezing prevention structure in cleaning equipment - Google Patents

Description

[Detailed Description of the Invention] [Field of Use of the Invention] The present invention relates to a spray cleaning device for discharging cleaning water toward an object to be cleaned such as an automobile to perform cleaning, and particularly to prevent freezing of a pipeline during cold weather. For the structure.

[Prior Art] Conventionally, for example, as disclosed in Japanese Utility Model Laid-Open No. 60-168582, a plurality of liquid tanks storing water, detergent liquid and the like, and pumps connected to the respective liquid tanks via open / close valves, respectively. In a cleaning device of the type that is equipped with and that water or detergent in the liquid tank is pressurized by a pump and discharged from the cleaning nozzle, hot water for freezing is introduced from the upstream side of the pump to reach the hose and cleaning nozzle. There is known a device for preventing freezing of a pipeline.

[Problems to be solved by the invention] By the way, in such a conventional device, hot water does not flow to the pipes connected to the respective liquid tanks upstream from the connection portion of the antifreezing pipe, and therefore, in a cold region where cooling is severe. However, there was a problem that the water in these pipelines was frozen.

Therefore, the problem to be solved by the present invention is to provide a structure capable of preventing freezing of the liquid layer side pipe line by simply flowing hot water for freezing without providing a special antifreezing heater or the like. There is a point.

[Means for Solving the Problems] The present invention is provided with a plurality of liquid tanks storing water, detergent liquid, and the like, and a pump connected to each of the liquid tanks via an on-off valve. Alternatively, in a cleaning device that pressurizes a detergent or the like with a pump and discharges it from a cleaning nozzle to perform cleaning, a three-way connecting pipe is connected to the downstream side of each of the on-off valves by coupling of good thermal conductors such as metal, and this connecting body is connected. Similarly, on the upstream side of the on-off valve, the good thermal conductors are connected to each other and fixed to the wall surface of each liquid tank in communication with the inside of the tank, and hot water from a hot water source is supplied to any one of the three-way connection pipes. The above problem is solved by connecting a receiving anti-freezing pipe, connecting the pump with another one of the connecting ports, and sequentially connecting the remaining connecting ports with a pipe material.

[Effect] As a result, hot water for freeze prevention does not flow only in the short conduits from each liquid layer to the three-way connecting pipe, and all of these conduits are formed by the coupling of good thermal conductors. It is possible to maintain the freezing temperature or higher by heat conduction from the hot water for freezing prevention in the connecting pipe and heat conduction from each liquid tank.

[Examples] Examples will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing the constitution of the device of one embodiment of the present invention.
Is a main body of the cleaning device, 2 is a water source for supplying water to the main body 1 of the device, and 3 is a cleaning nozzle extended from the main body 1 through a hose 4. Inside the cleaning device main body 1, there are provided liquid tanks 5 to 7 for respectively storing hot water, detergent liquid, and cold water, a hot water device 8 composed of a known kerosene boiler, and a pump 9 for injecting cleaning water under pressure.

Ball taps 11 and 12 equipped with liquid tanks 5 and 7, respectively
In the above, it is connected to the water supply pipe line 10, receives water supply from the water source 2, and stores water at a predetermined water level. Of these, the liquid tank 5 for hot water communicates with the hot water device 8 through a circulation path 14 equipped with a circulation pump 13, and the water stored therein is heated by the hot water device.

Reference numeral 15 is a hot water pipe communicating with the liquid tank 5, 16 is a detergent pipe communicating with the liquid tank 6, and 17 is a cold water pipe communicating with the liquid tank 7.
The hot water pipe 15 and the cold water pipe 16 communicate with each other at their downstream side and are connected to the suction side of the pump 9. The detergent pipe 16 communicates with the hot water pipe 15 to allow the detergent liquid stored in the liquid tank 6 to flow into the hot water pipe 15 to supply a detergent diluting liquid with hot water. Reference numerals 18 to 20 are electromagnetic on-off valves provided in the respective pipelines. When the on-off valve 18 is opened when the pump 9 is driven, hot water in the liquid tank 5 is discharged from the washing nozzle 3, and the on-off valve 19 is opened. For example, detergent diluent is released. The liquid tank 7 can be opened by opening the on-off valve 20.
The cold water inside can be discharged.

Reference numeral 21 denotes an anti-freezing line that connects the water absorbed by the circulation pump 13 of the circulation line 14 to the line for returning the water to the liquid tank 5 for hot water via the hot water device 8 and connects to the detergent line 16. , Which has an electromagnetic opening / closing valve 22 and which bypasses a part of the hot water circulating in the circulation path 14 by opening the valve 22 to send it as antifreezing water, and the antifreezing water is supplied from the detergent conduit 16 to the warm water conduit. 1
5, the cold water pipe 17, the pump 9 and the hose 4 are sequentially circulated and discharged from the cleaning nozzle 13 to prevent freezing of each part. Reference numeral 23 is a flow rate control valve provided in the antifreezing pipe 21.

FIG. 2 is a front external view showing a main part structure of each of the pipes. On the wall surfaces of the liquid tanks 5 to 7, pipe members 24 to 26 made of a metal having relatively good heat conductivity such as brass and iron are fixed plates.
It is fixed by communicating with each tank via 27, and this pipe material 24-26
The on-off valves 18 to 20 are connected to each of the above by screwing metal tube portions together. On the downstream side of the on-off valves 18 to 20, three-way connecting pipes 28 to 30 made of the same metal are also connected by screwing metal parts together, and each of the above connecting pipes 28 to 30 is connected to each part. Mold the conduit. That is, the connection pipe 28 fixed to the liquid tank 5 and the connection pipe on the liquid tank 6 side
29 is connected by a hose 31 to form a detergent pipe 16, and similarly, the connection pipe 28 and a connection pipe 30 on the liquid tank 7 side are connected by a hose 32 to form a hot water pipe 15. Further, one side of the connecting pipe 29 is connected to the antifreezing pipe line 21 including a hose 33, and the connecting pipe 30
A hose 34 is connected to one side of the pump and reaches the pump 9.

Therefore, as the solenoid valve opening / closing 22 is opened, the anti-freezing line 21
The warm water that comes from the detergent pipe 16
Connection pipe 29 → hose 31 → connection pipe 28 → hose
It becomes possible to prevent freezing of each part by circulating 32 → connecting pipe 30 → hose 34 → pump 9. In addition, the pipe line through which this antifreeze water does not flow, that is, the on-off valves 18 to 29 and the metal pipe material 24 to
Since 26 is connected to the connecting pipes 28 to 30 by coupling of metals having relatively good heat conduction, it is heated by heat conduction from the hot water flowing in the connecting pipes 28 to 30 to prevent freezing. You can

[Effects of the Invention] This invention is configured as described above, and hot water from the antifreezing pipes does not flow only in the short pipes from each liquid tank to the three-way connecting pipe. Since all the paths are formed by joining together good heat conductors, it is possible to maintain the freezing temperature or higher by the heat conduction from the hot water for freeze prevention in the three-way connecting pipe and the heat conduction from each liquid tank. Freezing can be reliably prevented without installing a heater or the like.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a front external view showing a main part structure of the embodiment. 1 is a cleaning device main body, 3 is a cleaning nozzle, 5 to 7 are liquid tanks, 8
Is a hot water device, 9 is a pump, 18 to 20 are open / close valves, 21 is an anti-freezing pipeline, and 28 to 30 are three-way connecting pipes.

Claims (1)

[Scope of utility model registration request] 1. A plurality of liquid tanks for storing water, detergent liquid and the like, and a pump connected to each of these liquid tanks via an on-off valve, and water or detergent in the liquid tank is pressurized by a pump. In a cleaning device that discharges from a cleaning nozzle to perform cleaning, a three-way connecting pipe is connected to the downstream side of each of the on-off valves by connecting heat-conductive conductors such as metal, and this connected body is connected to the heat-conductive conductors on the upstream side of the open-close valve. By connecting to the wall surface of each liquid tank so as to communicate with the inside of the tank, and to connect any one of the plurality of three-way connection pipes with a freeze prevention pipe line that receives hot water from a hot water source. Also, the freeze prevention structure in the cleaning device, wherein the other one of the connection ports is connected to the pump, and the remaining connection ports are sequentially connected by a pipe material.