KR20190138976A - High Pressure Washing Machine Having Water Leakage Detecting Function - Google Patents

Abstract

A high-pressure cleaner having a water leak detection function includes: a hot water boiler part exchanging heat from cold water to hot water; and a high-pressure cleaning part compressing and spraying the hot water and the cold water delivered from the hot water boiler part with high pressure. The hot water boiler part includes a heat exchange part including a fuel tank storing fuel and a combustion part igniting the fuel for combustion, and exchanging heat from cold water to hot water by using heat produced from the combustion part. The high-pressure cleaning part includes: a pressure pump discharging water flowing into a pump chamber through a water inlet to a water supply port by pressing the water with predetermined pressure; a water transfer pipe connected to the water supply port to transfer the water discharged with high pressure to the rear end; a water discharge pipe connected to one side of the water transfer pipe to receive the water, and including a wash gun installed at an end to spray the water in accordance with an opening operation; a first pressure switch placed on one side of the pump chamber to be turned on if pressure in the pump chamber reaches set pressure in accordance with the opening of the wash gun; a second pressure switch placed on the other side of the water transfer pipe to be turned on if pressure in the water transfer pipe is lower than set pressure; and a control part operating a pressure pup for a set time when receiving an on-operation signal of the second pressure switch, and maintaining the operation of the pressure pump when receiving an on-operation signal of the first pressure switch during the operation of the pressure pump, while urgently stopping the pressure pump regardless of the on-operation signal of the second pressure switch by determining a situation, in which the number of times operating and stopping the pressure pump reaches a set number within a predetermined time, as the detection of a water leak.

Description

High Pressure Washing Machine Having Water Leakage Detecting Function}

The present invention relates to a high pressure washer equipped with a leak detection function, and more specifically, to automatically supply and control the pressure pump according to the on / off operation signal of the pressure switch to leak water for automatically supplying the high pressure water required for the washing operation. It relates to a high pressure cleaner equipped with a sensing function.

In general, a high pressure washer is a washing device that supplies water to be used at a high pressure by using a pressure pump. Recently, a pressure switch is installed on an internal pipe to automatically drive a pressure pump when the pressure in the pipe decreases. Increasingly, the pressure pump was automatically stopped to provide a steady supply of water at the appropriate high pressure.

However, when leakage occurs in the pressure pump or water supply line, the pressure pump is automatically driven while the internal pressure decreases, and the pressure pump stops when the pressure increases with the operation of the pressure pump. As the pressure pump is continuously driven, there is a problem that the power consumption increases as the pressure pump is driven unnecessarily as well as the motor is damaged due to the overload.

Public utility model No. 20-2010-0010662 (2010.10.29), high pressure washer

An object of the present invention is to solve this problem, the automatic control of the pressure pump in accordance with the on / off operation signal of the pressure switch to supply water of a suitable high pressure, if the leakage occurs on the water supply line It is to provide a high pressure washer equipped with a leak detection function that can detect and prevent the pressure pump is damaged or unnecessary power consumption by emergency stop the repeated operation of the pressure pump.

High pressure washer equipped with a leak detection function according to an embodiment of the technical idea of the present invention for achieving the above object, cold and hot water can be injected, in the high pressure washer equipped with a leak detection function, cold water to hot water Hot water boiler unit for heat exchange; And a high pressure washing unit for compressing and injecting cold and hot water received from the hot water boiler unit at a high pressure. The hot water boiler unit includes a fuel tank in which fuel is stored and a combustion unit for igniting and burning the fuel. And a heat exchanger configured to heat-exchange cold water to hot water by using heat generated by the combustion unit, wherein the high pressure washing unit pumps and pressurizes the water introduced into the pump chamber through the water inlet to a constant pressure. A discharge pump; A water transfer pipe connected to the water supply port to transfer water discharged at a high pressure to a rear end; A water discharge pipe connected to one side of the water transfer pipe to receive water and equipped with a washgun at an end thereof to spray water according to an opening operation; A first pressure switch disposed at one side of the pump chamber and operating on when the pressure inside the pump chamber reaches a set pressure according to the opening of the washgun; A second pressure switch disposed on the other side of the water transfer pipe and operating on when the pressure inside the water transfer pipe decreases below a set pressure; When the on-operation signal of the second pressure switch is received, the pressure pump is driven for a set time, and when the on-operation signal of the first pressure switch is received during operation of the pressure pump, the pressure pump is maintained. A controller configured to emergency stop the pressure pump irrespective of the on-operation signal of the second pressure switch by determining leakage detection when the number of driving and stopping times of the pressure pump reaches a set number of times; A bypass valve for recovering a predetermined flow rate through a bypass pipe connected to a recovery port of the pump chamber when the water transfer pipe pressure increases; And a safety valve disposed at a rear end position of the bypass valve on the water transfer pipe to discharge a predetermined flow rate to the outside through an emergency discharge pipe connected to one side when the pressure inside the water transfer pipe reaches an emergency pressure. When the on-operation signal of the second pressure switch is received, the pressure pump is driven, and when the off-operation signal is received, the pressure pump is driven and stopped. The pressure pump can be emergency stopped regardless of the ON operation signal of the second pressure switch.

In addition, the second pressure switch has an initial state of the contact point B, and is connected between the bypass valve and the bypass pipe on the water transport pipe to detect a pressure change inside the water transport pipe.

In addition, the high pressure washer is provided with a display unit for distinguishing the state of the emergency stop according to the leakage detection and blinking and lit color, the display unit is installed at a predetermined height on the base frame in which the pressure pump is seated on the top Can be mounted to the module.

The heat exchange part may include: a case connected to one side of the combustion part and provided with a space therein to receive heat from the combustion part; An exhaust port formed at one side of the case and exhaust gas is discharged; And a heat exchange tube installed in the inner space of the case and configured to exchange heat by moving water.

In addition, the washgun, the lever for controlling the discharge of high pressure water; And a nozzle in which a narrow flow path is formed so that water is discharged at high pressure, wherein the nozzle comprises: a coupler connected to an end of the washgun; A rotary sphere coupled to one side of the coupling unit to be rotatable and having injection holes for spraying high pressure water; A separation preventing cap for preventing the rotating tool from being separated from the coupling tool; And a fastener for engaging the release preventing cap to the end of the coupler.

High pressure washer equipped with a leak detection function according to the present invention,

First, the pressure pump is automatically controlled by using the on / off operation signals of the first pressure switch disposed in the pressure pump and the second pressure switch disposed in the water transfer pipe through which the high pressure water is transferred. When the number of driving of the pressure pump reaches the set number of times, it is judged as leak detection and emergency stop of the pressure pump, thereby preventing damage to the pressure pump due to repeated driving and preventing unnecessary power loss regardless of washing operation. can do.

In addition, as the pressure pump is emergency stop, the water supply is cut off, thereby limiting the water leaking to the leaked portion, thereby preventing the consumption of water due to leakage.

Second, on the water feed pipe, if the pressure inside the water feed pipe increases rather than the bypass set pressure, a bypass valve for recovering a certain flow rate through the bypass pipe connected to the recovery port of the pump chamber is provided. This can prevent malfunction of each pressure switch or irregular discharge of water through the washgun.

Third, when the pressure inside the water transfer pipe reaches the emergency pressure at the rear end of the bypass valve on the water transfer pipe is provided with a safety valve for discharging a certain flow rate through the emergency discharge pipe connected to one side, on the water supply line When excessive high pressure is applied, it is possible to prevent damage to each pressure switch and various components or leakage at each fastening part.

Fourth, the second pressure switch has an initial state of the contact point B and is disposed between the bypass valve and the bypass pipe on the water transfer pipe to detect a pressure change inside the water transfer pipe, and the controller controls the on-operation signal of the second pressure switch. The pressure pump can be driven when the signal is received, and the pressure pump can be stopped when the off-operation signal is received. Therefore, it is possible to more clearly distinguish between the situation of leakage and the situation where the water is supplied from the water transfer pipe by opening the washgun. You can increase the accuracy.

Fifth, the high pressure washer equipped with a leak detection function, there is an advantage that the cold, hot water injection through the hot water boiler unit for heat exchange the cold water to hot water.

Sixth, the rotary nozzle is applied to rotate the high pressure water while rotating, it is possible to spray the finer water, there is an advantage that can spray the water toward a large area.

1 is a perspective view showing the overall configuration of a high pressure washer equipped with a leak detection function according to an embodiment of the present invention.
Figure 2 is a front view schematically showing the main configuration of the high pressure washer equipped with a leak detection function according to an embodiment of the present invention.
3 is an exploded perspective view of a nozzle according to another embodiment of the present invention.
4 is a combined cross-sectional view of a nozzle according to another embodiment of the present invention.
5 and 6 are side cross-sectional views showing the configuration of the first pressure switch and the second pressure switch according to an embodiment of the present invention.
Figure 7 is a front view showing the configuration of a pressure pump, the second pressure switch is installed on the bypass valve according to another embodiment of the present invention.

DETAILED DESCRIPTION In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1 is a perspective view showing the entire configuration of a high pressure washer equipped with a leak detection function according to an embodiment of the present invention, Figure 2 is a main configuration of a high pressure washer equipped with a leak detection function according to an embodiment of the present invention It is a schematic front view.

1 and 2, the high pressure washer (1) (hereinafter, a high pressure washer) equipped with a leak detection function according to an embodiment of the present invention is a hot water boiler unit 100 and the hot water to heat the cold water into hot water It comprises a high pressure washing unit 200 for compressing and spraying cold and hot water received from the boiler unit 100 at a high pressure.

That is, the high pressure washer (1) is a high pressure washer (1) capable of hot water injection, the cold water supplied from the water supply line 21 is directly connected to the hot water boiler unit 100 side to the hot water boiler unit 100 The heat exchange is made through, and the hot water discharged from the hot water boiler unit 100 is sent to the high pressure washing unit 200 to be compressed to generate high pressure hot water, and finally used through the washgun 231.

The hot water boiler part 100 is formed in a columnar shape so as to be mounted on a housing 110 in which a control unit (not shown) having a plurality of buttons is installed, and from the fuel tank 120 to correspond to the control of the controller. A case 140 which is formed to fix one end of the combustion unit 130 to ignite and combust the supplied fuel and has an exhaust port 142 so as to discharge exhaust gas due to fuel combustion; One end and the other end in the case 140 is exposed to the outside, one end is provided as a low-pressure pipe that can be directly connected to the water supply line 21 is introduced into one end corresponding to the driving of the combustion unit 130 It comprises a heat exchange tube 143 which is provided to be discharged to the other end by heat-exchanging cold water with hot water.

Hereinafter, the hot water boiler unit 100 will be described in detail with reference to the accompanying drawings.

The hot water boiler part 100 is formed to fix one end of the combustion unit 130 to the lower side of the inside. That is, the case 141 is built in the housing 110 and is formed in a columnar shape so as to mount the heat exchanger 140 therein, and fixed to the lower center portion so that one end of the combustion unit 130 can be fixedly installed. A hole (not shown) is formed, and both sides of the fixing hole are perforated with inlet and discharge pipes (not shown) so as to pipe one end and the other end of the heat exchanger 140 and communicate with the inside of the upper surface. An exhaust port 142 is provided to protrude so as to discharge the exhaust gas due to combustion.

The heat exchanger 140 is connected to one side of the combustion unit 130 to receive heat from the combustion unit 130 and is formed at a case 141 having a space therein, and one side of the upper portion of the case 141. It includes an exhaust port 142 is discharged exhaust gas and the heat exchange tube 143 is installed in the inner space of the case 141, the water is moved to heat exchange.

Here, the combustion unit 130 is heat exchanged by driving a fuel supply pump (not shown) provided to supply fuel stored in the air supply fan (not shown) and the fuel tank 120 under the control of the controller. It is configured to be combustible according to the ignition by injecting air and fuel to the lower side of the unit 140, this configuration is the same as or similar to the configuration of a general boiler currently on the market will be omitted in more detail.

That is, the heat exchanger 140 is wound twice a number of times so as to have a spring-like shape in the case 141, and one end of the heat exchange part 140 is directly connected to the bottom side of the case 141 through a water supply line 21. The other end is connected to the hot water discharge line 22 installed on the other side of the bottom surface of the hot water boiler part 100 and a heat exchange tube 143 provided on one surface of the heat exchange tube 143 in the same manner as welding. It is fixedly installed is composed of a plurality of heat exchange fins (not shown) provided to increase the heat exchange efficiency as the fuel is burned by driving the combustion unit 130 in accordance with the control of the control unit.

In this case, the heat exchanger tube 143 is mounted on the heat exchanger 140 and provided to protrude out of the housing 110 so as to be connected to the water supply line 21 when it is installed in the housing 110.

Next, the high pressure washing unit 200 is a part for compressing and spraying cold and hot water received from the hot water boiler unit 100 at high pressure.

The high pressure washing unit 200, the pump driving pressure pump 210 to discharge the water flowing into the water supply port 212 by pressurizing the water introduced into the pump chamber 213 through the water inlet 211, the water supply port 212, Water supply pipe 220 is connected to the water supply port 212 and the water is discharged at a high pressure to the rear end, the water transport pipe 220 is connected to one side of the water transport pipe 220 is supplied with water and the end is sprayed water in accordance with the opening operation The water discharge pipe 230 having the wash gun 231 mounted thereon is disposed at one side of the pump chamber 213 and is turned on when the pressure inside the pump chamber 213 reaches the set pressure according to the opening of the wash gun 231. The first pressure switch 240 in operation, the other side of the water transfer pipe 220 is disposed on the second pressure switch 250, the second pressure to operate when the pressure in the water transfer pipe 220 is lower than the set pressure When the on operation signal of the switch 150 is received, the pressure pump 210 is turned on for a set time. When the on-operation signal of the first pressure switch 240 is received during operation of the pressure pump 210, the driving of the pressure pump 210 is maintained, but the driving and stopping of the pressure pump 210 within a set time. When the number of times reaches the set number is determined by the water leak detection controller 260 for emergency stop of the pressure pump 210 irrespective of the on-operation signal of the second pressure switch 250, disposed on the water transfer pipe 220 The bypass valve 270 for recovering a predetermined flow rate through the bypass pipe 271 connected to the recovery port 216 of the pump chamber 213 when the pressure inside the water transfer pipe 220 increases from the bypass set pressure. And a predetermined flow rate through the emergency discharge pipe 281 connected to one side when the pressure inside the water transfer pipe 220 reaches the emergency pressure and is disposed at a rear end position of the bypass valve 270 on the water transfer pipe 220. Including a safety valve 280 to discharge the The lure is.

The high pressure washing unit 200 is on, off operation of the first pressure switch 240 disposed in the pressure pump 210 and the second pressure switch 250 disposed in the water transfer pipe 220 through which water of high pressure is transferred. The pressure pump 210 is automatically controlled by the pump driving using a signal, but when the driving frequency and the stop frequency of the pressure pump 210 reaches within the set time, it is determined as a leak detection to emergency stop the pressure pump 210, It is possible to prevent the damage of the pressure pump 210 according to the repetition as well as to prevent unnecessary power and water wasted irrespective of the washing operation.

 The high pressure washing unit 200 includes a pressure pump 210, a water transfer pipe 220, a water discharge pipe 230, a first pressure switch 240, a second pressure switch 250, and a controller 260. .

Here, as shown in Figure 1, the high-pressure washing unit 200 according to a preferred embodiment of the present invention is installed on the base frame 10 is equipped with a moving wheel 12 is moved to each cleaning place and the cleaning operation is made It may be provided so as to, the rear end of the base frame 10 is equipped with a handle 11 at a predetermined height can facilitate the user's convenience.

The pressure pump 210 is a pressure providing means for providing pressure to inject water at a high pressure, the pump chamber 213 is provided with a water inlet 211 and the water supply port 212, and pump driven It includes a drive motor 214 for pressurizing the water introduced into the pump chamber 213 to a constant pressure.

Here, the water inlet 211 is connected to a water tank (not shown) disposed on the base frame 10 or a water inlet connected to a remote water source (water source, not shown) spaced apart from the high-pressure washing unit 200. It is connected to 211 can supply the required water to the pressure pump 210.

In addition, a pressure gauge substrate 215 is disposed in the pump chamber 213 to check whether the operator is operating at an appropriate pressure while visually checking the pressure gauge substrate 215.

In addition, a plurality of pistons or impellers are disposed in the pump chamber 213 according to the type of the pressure pump 210 to generate a discharge pressure while the piston or impeller rotates by the rotational force of the driving motor 214. .

Accordingly, the water inlet 211 communicates with the low pressure region inside the pump chamber 213 to supply water to the inside, and the water supply port 212 communicates with the high pressure region where the pressure increases according to the pump driving, thereby providing water at the rear end. The supply pipe 220 is arranged to supply high pressure water.

The water transfer pipe 220 is a pipeline through which the high pressure water discharged from the pressure pump 210 is transferred, and includes a second pressure switch 250, a water discharge pipe 230, a bypass valve 270, and a safety valve which will be described later. 280 may be installed.

The water discharge pipe 230 is a pipe for discharging the water required for the washing operation to the outside, is connected to one side of the water transfer pipe 220 receives the water and the end of the wash gun for spraying water in accordance with the opening operation (231, Wash Gun) is installed.

Here, as shown in Figure 1, the washgun 231 is provided with a lever 232 used to open or close the inner conduit by the operator's operation, the inner conduit is in accordance with the operation of the lever 232 When open, the high pressure water is discharged through the nozzle 233 at the end. That is, the washgun 231 includes a lever 232 for controlling the discharge of the high pressure water and a nozzle 233 having a narrow flow path for discharging the water at a high pressure.

Hereinafter, the structure of the nozzle 233 will be described in detail with reference to FIGS. 3 and 4.

3 is an exploded perspective view of a nozzle according to another embodiment of the present invention, Figure 4 is a combined cross-sectional view of the nozzle according to another embodiment of the present invention.

Referring to FIGS. 3 and 4, the nozzle 233 is coupled to the coupler 2331 connected to the end of the washgun 231 and rotatably coupled to one side of the coupler 2331, and the high pressure water is rotated. Rotating hole (2334), the injection hole (2336) is injected, the release prevention cap (2338) and the separation prevention cap (2338) for preventing the rotation sphere 2334 is separated from the coupling sphere (2331) It comprises a fastener (2339) for engaging the end of the coupling sphere (2331).

One side of the coupler (2331) is configured to form a screw thread to be coupled to the end of the wash gun (231). That is, water (cold water or hot water) introduced through the coupling hole 2331 is introduced into the concave groove 2335 of the rotary hole 2334 through the outlet hole 2333 and through the injection hole 2336. It can be sprayed to the outside.

At this time, the injection hole 2336 is formed so as to penetrate from the concave groove (2337) to the inclined surface (2335) as shown in Figure 4 but 20 to 50 ° toward the vertical center of the concave groove (2337). . In addition, the injection hole 2336 may be formed to penetrate from the concave groove 2337 to the inclined surface 2335 but inclined by about 20 to 50 ° toward the horizontal center of the concave groove 2337. This is to allow the rotary ball 2334 to rotate in response to the spray pressure of the water by allowing the water to be discharged simultaneously in the direction in which the inclination angle is formed through the injection hole 2336.

In addition, one end of the coupling sphere 2331, that is, one side of the lower end of the connecting shaft 2332 is formed in the inclined recess 2337, and protrudes to match the concave groove 2337 in the rear of the rotary sphere (2334). Formed water can be sprayed toward the front as possible by the inclination of the water sprayed between the gap between the coupler (2331) and the rotary ball (2334). At this time, the inclined surface 2335 may be formed in the rear of the rotary sphere to prevent the sprayed water is caught on the rear of the rotary sphere (2334).

On the other hand, the first pressure switch 240 is a pressure switch for detecting an open state in which water is injected from the wash gun 231, is disposed on one side of the pump chamber 213 to open the wash gun 231 Accordingly, when the pressure inside the pump chamber 213 reaches the set pressure, the pump operates on.

Here, in the case of the pump chamber 213, the water pressure toward the water transfer pipe 220 and the water discharge pipe 230 is generated while the wash gun 231 is opened, the internal pressure increases, the first pressure switch 240 Is set to a set pressure corresponding to the pressure size increases with the occurrence of the water flow to detect the open state of the wash gun 231. In addition, the first pressure switch 240 is installed in a state of operating in the initial state of the contact a, that is, the non-sensing state, and the on-state operation in the sensing state.

Therefore, the washgun 231 is normally maintained in the closed state in the closed state, and when the washgun 231 is opened and water is discharged through the nozzle 233, the water flow inside the pump chamber 213. Is detected and the pressure increases to turn on. In addition, when the washgun 231 is changed from the open state to the closed state, the washgun 231 returns to the off state. Here, the on operation or off operation signal generated according to the operation state is transmitted to the control unit 260 through a separate signal line and is used as basic data for automatic driving control of the pressure pump 210.

To this end, as shown in FIG. 5, the first pressure switch 240 is installed in communication with the inside of the pump chamber 213, and an inlet 242 is opened at a lower end thereof, and the body 241 is formed. The actuator 243 is installed to be elastically slid toward the inlet 242 by the elastic spring 244 elastically compressed in the) and moves forward and backward by the inlet pressure of the water flowing through the inlet 242. And a detector 245 for generating a detection signal while the operation button 246 is pressed by the reverse operation of the actuator 243.

In addition, the first pressure switch 240 is set to the initial state of the contact a as shown in the circuit diagram on the lower right, when the pressure of the incoming water retracts the actuator 243 while pressing the elastic spring 244, the sensing body The operation button 246 of 245 is pressed to transmit the ON operation signal to the controller 260 while the ON operation is performed, and the pressure of the water introduced into the inside of the elastic spring 244 as the opened washgun 231 is closed. When the actuator 243 is moved forward by being lower than the elastic force of), the pressurized operation button 246 returns to its original position and transmits the off operation signal to the controller 260 while performing the off operation.

The second pressure switch 250 is a pressure switch for detecting the internal pressure of the water transfer pipe 220 to which water is supplied, and is disposed on the other side of the water transfer pipe 220 to set the internal pressure of the water transfer pipe 220. When it is lower than the pressure, it is on and when it is above the set pressure, it is off.

Here, when the washgun 231 is opened or water leaks on the water supply line in a state in which both the first pressure switch 240 and the second pressure switch 250 are in an off state (total stop), the water transfer pipe 220 is inside. The pressure of the pressure is reduced, the second pressure switch 250 detects the pressure reduction state inside the water transfer pipe 220 according to the opening or leakage of the wash gun 231. In addition, the second pressure switch 250 is installed in an initial state of the contact b, that is, in a non-sensing state, on and operating in a sensing state.

To this end, as shown in FIG. 6, the second pressure switch 250 is installed in communication with one side of the water transfer pipe 220, and a lower end of the body 251 is formed by opening the inlet 252 and the body 251. Actuator 253 is installed to be elastically operated toward the inlet 252 by the elastic spring 254 elastically compressed in the) to move forward and backward by the inlet pressure of the water flowing through the inlet 252 And a detector 255 for generating a detection signal while pressing the operation button 256 by the reverse operation of the actuator 253.

In addition, the second pressure switch 250 is set to the initial state of the contact b as shown in the circuit diagram on the lower right to maintain the on-operation state at the beginning of the drive while the pressure of the incoming water pressurizes the elastic spring 254 When the operation 253 is retracted, when the operation button 256 of the sensor 255 is pressed, the operation is turned off while the operation button 256 of the sensor 255 is pressed, and the pressure of the water introduced into the internal spring is controlled by the elastic spring 254. When the actuator 253 is lower than the elastic force and the actuator 253 moves forward, the pressurized operation button 256 returns to its original position and transmits an operation signal to the controller 260 while being operated on.

Here, the second pressure switch 250 is set to the initial state of the contact b to automatically transmit the on-operation signal to the control unit 260 at the initial driving time when the power is applied to the high-pressure cleaner 1, the pressure The pump 210 is operated to provide a basic pressure for using the high pressure cleaner 1 while automatically driving.

On the other hand, the control unit 160 is a microcomputer for controlling the high-pressure washing machine 1 according to the preferred embodiment of the present invention, when the on-operation signal of the second pressure switch 250 is received, the pressure pump 210 for a set time ), And when the on-operation signal of the first pressure switch 240 is received while the pressure pump 210 is being driven, the pressure pump 210 is maintained, but the pressure is maintained within a set time (for example, 5 minutes). When the driving count and the stopping count of the pump 210 reach (for example, 15 times), it is determined as a leak detection to emergency stop the pressure pump 210 regardless of the on-operation signal of the second pressure switch 250. It works.

The first pressure switch 240 disposed on the pressure pump 210 and the second pressure switch disposed on the water transfer pipe 220 through which water of high pressure is transferred through the configuration and function of the high pressure cleaner 1 as described above. The pump driving control of the pressure pump 210 is automatically controlled by using the on and off operation signals of 250, but when the driving frequency and the stopping frequency of the pressure pump 210 reach within the set time, it is determined as a leak detection and the 2 By emergency stop of the pressure pump 210 irrespective of the operation signal of the pressure switch 250, it is possible to prevent the damage of the pressure pump 210 due to the repetition of the drive, as well as unnecessary power and water irrespective of the washing operation Can be prevented from being wasted.

The control unit 260 drives the pressure pump 210 when the on-operation signal of the second pressure switch 250 is received, and stops the driving of the pressure pump 210 when the off-operation signal is received. When the number of driving and stopping times of the pump 210 reaches the set number of times, the leak detection may be determined and the pressure pump 210 may be emergency stopped regardless of the on-operation signal of the second pressure switch 250.

Meanwhile, the high pressure cleaner 1 according to the preferred embodiment of the present invention may further include a bypass valve 270 and a safety valve 280.

The bypass valve 270 is a valve for adjusting the pressure so that the water is delivered to a constant pressure in the water transfer pipe 220, the water transfer pipe 220 is disposed on the water transfer pipe 220 than the bypass set pressure When the internal pressure increases, a certain flow rate is recovered through the bypass pipe 271 connected to the recovery port 216 of the pump chamber 213. Through the configuration of the bypass valve 270 to prevent the phenomenon in which the pressure switch 240, 250 is malfunctioned or the water is irregularly discharged through the washgun 231 while applying a high pressure than necessary on the water supply line Can be.

The safety valve 280 is a valve for preventing an excessive pressure generated inside the water transfer pipe 220 from being damaged. The safety valve 280 is disposed at a rear end position of the bypass valve 270 on the water transfer pipe 220. When the pressure inside the water transfer pipe 220 reaches the emergency pressure, a certain flow rate is discharged through the emergency discharge pipe 281 connected to one side. Through the configuration of the safety valve 280 is applied to the high pressure on the water supply line can be prevented that the pressure switch (240, 250) and various components are damaged or leaks in the fastening portion.

7 is a front view illustrating a configuration of a pressure pump in which a second pressure switch according to another embodiment of the present invention is installed on a bypass valve.

Referring to FIG. 7, a second pressure switch 250 according to a preferred embodiment of the present invention is disposed between the bypass valve 270 and the bypass pipe 271 on the water transport pipe 220 to provide a water transport pipe 220. The internal pressure change is sensed, and the control unit 260 drives the pressure pump 210 when the on operation signal of the second pressure switch 250 is received, and operates the pressure pump 210 when the off operation signal is received. When the driving and stopping times of the pressure pump 210 reach the set number of times within the set time, the drive is stopped and the pressure pump 210 is emergencyly stopped regardless of the operation signal of the second pressure switch 250. To control. As a result, it is possible to more clearly distinguish the situation in which the leak occurs and the situation in which the water is supplied from the water transfer pipe 220 by opening the wash gun 231, thereby increasing the accuracy of the automatic control.

On the other hand, the high pressure washer 1 according to the preferred embodiment of the present invention is driven in accordance with the control signal of the control unit 260 is provided with a display unit 292 for displaying various operating or setting state of the high pressure washer 1 It is preferable.

In particular, it is preferable that the operator is provided with an emergency stop situation according to the leak detection to the outside to be recognized early to take appropriate measures. Although the display unit 292 is a lamp for dividing the state into a blinking state and a lighting color, the display unit 292 is illustrated, but the present invention is not limited thereto. It may be provided to output the pre-stored sound data according to various conditions.

In addition, as shown in FIG. 1, the display unit 292 is mounted on the control module 290 installed at a predetermined height on the base frame 10 so that the operator can easily identify the display contents. 290 is preferably provided with an operation unit 291 for manipulating the various settings and operating conditions of the high-pressure cleaner 1 is provided so that the setting and operation status can be confirmed while looking at the display unit 292.

Hereinafter, referring to FIGS. 1 and 2, the operating state of the high pressure cleaner 1 described above will be described in detail.

First, when water is supplied from a water tank disposed on the base frame 10 or a remote water source, in this case, when the hot water is to be used, the water is supplied to the hot water boiler part through the water supply line 21. Supplied to the heat exchange unit 140 of 100, if you want to use cold water is immediately sent to the water inlet 211 of the high-pressure washing unit 200.

Once the hot water is used, the fuel of the fuel tank 120 is sent to the combustion unit 130, and when heat is generated by the combustion of the fuel, the water to be sent to the heat exchange tube 143 of the heat exchange unit 140 is heated. Heat exchange takes place. The high temperature hot water that has become a high temperature by heat exchange is sent to the water inlet 211 through the hot water discharge line (22).

On the other hand, in the case of using cold water, the cold water is sent directly from the water supply line 21 to the water inlet 211, when hot water or cold water flows into the water inlet 211, the operation of the pressure pump 210 The water is compressed to produce high pressure.

Then, the high pressure water compressed by the pressure pump 210 is transferred to the water transfer pipe 220 through the water supply unit 212, and finally sent to the water discharge pipe 230 to the outside through the wash gun 231. Sprayed and discharged.

At this time, the first pressure switch 240 is turned on when the pressure inside the pump chamber 213 reaches the set pressure according to the opening of the wash gun 231, the second pressure switch 250 is the water transfer pipe 220 When the internal pressure decreases below the set pressure, it is turned on.

In addition, when the controller 260 receives the ON operation signal of the second pressure switch 150, the controller 260 drives the pressure pump 210 for a set time and turns on the first pressure switch 240 while the pressure pump 210 is being driven. When the operation signal is received, the driving of the pressure pump 210 is maintained, and when the driving and stopping times of the pressure pump 210 reach the set number of times within a set time, it is determined that the leak is detected and the second pressure switch 250 Emergency stop of the pressure pump 210 irrespective of the on-operation signal.

Then, when the pressure inside the water transfer pipe 220 is increased through the bypass valve 270 than the bypass set pressure, a certain flow rate is recovered through the bypass pipe 271, and the safety valve 280 is a water transfer pipe ( When the internal pressure reaches the emergency pressure, a predetermined flow rate is discharged to the outside through the emergency discharge pipe 281.

Next, when an emergency stop situation occurs according to the leak detection, the state is divided into flashing and lighting colors through the display unit 292.

As described above, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the meaning or the scope of the present invention described in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1: high pressure cleaner 10: base frame
11: handle 12: wheel
100: hot water boiler portion 110: housing
120: fuel tank 130: combustion unit
140: heat exchanger 200: high pressure washing unit
210: pressure pump 220: water transfer pipe
230: water discharge pipe 240: first pressure switch
250: second pressure switch 260: control unit
270: bypass valve 280: safety valve
290: control module

Claims (5)

In the high pressure washing machine (1) equipped with a leak detection function capable of cold and hot water injection,
Hot water boiler unit 100 for heat-exchanging cold water with hot water; And
And a high pressure washing unit (200) for compressing and spraying cold and hot water received from the hot water boiler unit (100) at high pressure.
The hot water boiler unit 100,
A fuel tank 120 in which fuel is stored, and a combustion unit 130 for igniting and burning fuel, are provided, and a heat exchange unit for heat-exchanging cold water with hot water using heat generated by the combustion unit 130 ( 140),
The high pressure washing unit 200,
A pressure pump 210 which drives the pump and pressurizes the water introduced into the pump chamber 213 through the water inlet 211 to a constant pressure and discharges the water to the water supply port 212;
A water transfer pipe 220 connected to the water supply port 212 to transfer water discharged at a high pressure to a rear end;
A water discharge pipe 230 connected to one side of the water transfer pipe 220 to receive water and having a wash gun 231 mounted at an end thereof to spray water according to an opening operation;
A first pressure switch 240 disposed on one side of the pump chamber 213 and operating on when the pressure inside the pump chamber 213 reaches a set pressure according to the opening of the wash gun 231;
A second pressure switch 250 disposed on the other side of the water transfer pipe 220 and operating on when the pressure inside the water transfer pipe 220 decreases below a set pressure;
When the on-operation signal of the second pressure switch 150 is received, the pressure pump 210 is driven for a set time, and when the on-operation signal of the first pressure switch 240 is received during operation of the pressure pump 210. Maintains the driving of the pressure pump 210, but if the number of driving and stopping of the pressure pump 210 reaches the set number of times within the set time, it is determined as the leak detection and related to the ON operation signal of the second pressure switch 250 Control unit 260 for emergency stop the pressure pump 210 without;
When the pressure inside the water transfer pipe 220 is increased on the water transfer pipe 220 and the pressure inside the water transfer pipe 220 increases than the bypass set pressure, a predetermined flow rate is passed through the bypass pipe 271 connected to the recovery port 216 of the pump chamber 213. Bypass valve 270 to recover the; And
Placed at the rear end of the bypass valve 270 on the water transfer pipe 220, when the pressure inside the water transfer pipe 220 reaches the emergency pressure, a certain flow rate to the outside through the emergency discharge pipe (281) connected to one side It includes a; safety valve 280 for discharging,
The control unit 260 drives the pressure pump 210 when the on-operation signal of the second pressure switch 250 is received, and stops the driving of the pressure pump 210 when the off-operation signal is received. When the number of driving and stopping times of the pump 210 reaches the set number of times, it is determined that the leak is detected, and the leak detection is characterized in that the pressure pump 210 is emergency stopped regardless of the on-operation signal of the second pressure switch 250. High pressure cleaner with features. The method of claim 1,
The second pressure switch 250,
Leakage characterized in that it has an initial state of the contact point B, and is connected between the bypass valve 270 and the bypass pipe 271 on the water transfer pipe 220 to sense a pressure change in the water transfer pipe 220 High pressure cleaner with detection. The method of claim 1,
The high pressure washer 1,
The display unit 292 is provided to display the state of the emergency stop according to the leak detection by blinking and lighting color, and the display unit 292 is on the base frame 10 on which the pressure pump 210 is seated High pressure washer with a leak detection function, characterized in that mounted on the control module 290 installed at a certain height. The method of claim 1,
The heat exchanger 140,
A case 141 connected to one side of the combustion unit 130 and provided with a space therein to receive heat from the combustion unit 130;
An exhaust port 142 formed at one side of the case 141 and exhaust gas is discharged; And
The case 141 is installed in the inner space and the heat is moved to the heat exchange tube 143 is a high pressure washer with a leak detection function comprising a. The method of claim 1,
The washgun 231,
A lever 232 for controlling the discharge of the high pressure water; And
And a nozzle 233 in which a narrow flow path is formed to discharge water at a high pressure.
The nozzle 233,
A coupling tool 2331 connected to an end of the wash gun 231;
A rotary sphere 2334 which is rotatably coupled to one side of the coupling sphere 2331 and has injection holes 2336 for spraying high-pressure water;
An anti-separation cap 2338 for preventing the rotating tool 2334 from being separated from the coupling tool 2331; And
High pressure washer with a leak detection function comprising a; fastener (2339) for engaging the release prevention cap (2338) to the end of the coupling sphere (2331).

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