CN117703579A - Device and method for diagnosing faults of heat dissipation system of working machine and working machine - Google Patents

Abstract

The invention relates to the field of engineering machinery, and provides a cooling system fault diagnosis device and a diagnosis method of a working machine, and the working machine comprises the following components: an engine; a heat sink; the flow sensor is used for acquiring the current flow of the water outlet of the engine in real time; and the controller is in communication connection with the flow sensor and is used for comparing the current flow with the first target flow to judge whether the interior of the radiator is blocked or not, and if the current flow is smaller than or equal to the first target flow, the controller judges that the interior of the radiator is blocked. So set up, according to the delivery port flow of real-time detection and the comparison of the first target flow of storage to can directly perceivedly, accurately judge whether the jam takes place inside the radiator or take place outside the radiator, and then can improve the troubleshooting efficiency, effectively judge the inside jam condition of radiator, avoid unnecessary manpower, material resources and time input, promoted the operating efficiency of operating machine.

Description

Device and method for diagnosing faults of heat dissipation system of working machine and working machine

Technical Field

The present invention relates to the technical field of engineering machinery, and in particular, to a cooling system fault diagnosis device and method for a working machine, and a working machine.

Background

The engine of engineering machinery generally adopts a water-cooled engine, and the engine is cooled by arranging a radiator so as to ensure the reliable operation of the engine. If the radiator is blocked, the water temperature of the engine is abnormally increased.

At present, when the engine has high-temperature faults, the problem that the radiator is only blindly solved by replacing the radiator is solved, and the blockage condition inside the radiator is judged after the radiator is disassembled. However, such an operation consumes a lot of manpower, material resources and time, and cannot effectively judge the blockage situation inside the radiator. If the high-temperature fault can not be solved, the engine is required to be replaced, and the fault removal efficiency is low.

Disclosure of Invention

The invention aims to provide a cooling system fault diagnosis device and a cooling system fault diagnosis method of a working machine and the working machine, which are used for solving at least one of the problems in the prior art.

In order to achieve the above object, the present invention provides a heat dissipation system failure diagnosis device for a working machine, comprising:

an engine;

the water outlet of the engine is connected with the water inlet of the radiator, and the water inlet of the engine is connected with the water outlet of the radiator;

the flow sensor is used for acquiring the current flow of the water outlet of the engine in real time;

and the controller is in communication connection with the flow sensor and is used for judging whether the interior of the radiator is blocked according to comparison between the current flow and a first target flow stored in advance, and when the current flow is smaller than or equal to the first target flow, the controller judges that the interior of the radiator is blocked.

The heat dissipation system fault diagnosis device of the working machine provided by the invention further comprises:

the cleaning device is used for cleaning impurities in the radiator, the cleaning device is in communication connection with the controller, and the controller is further used for controlling whether the cleaning device works after judging that the inside of the radiator is blocked.

The heat dissipation system fault diagnosis device of the working machine provided by the invention further comprises:

the cleaning device comprises a filter, wherein the filter is arranged on the first pipeline or the second pipeline;

the control valve is in communication connection with the controller and is used for controlling the on-off condition of the first pipeline and the second pipeline, and the control valve can be switched between a first state and a second state; in the first state, the first pipeline is conducted, and the second pipeline is cut off; in the second state, the first pipeline is cut off, and the second pipeline is conducted.

The heat dissipation system fault diagnosis device of the working machine provided by the invention further comprises:

and the alarm device is in communication connection with the controller, and the controller is also used for controlling the alarm device to send alarm information after judging that the inside of the radiator is blocked.

The heat dissipation system fault diagnosis device of the working machine provided by the invention further comprises:

and the display device is in communication connection with the controller, and the controller is also used for controlling the display device to display fault alarm information.

The heat dissipation system fault diagnosis device of the working machine provided by the invention further comprises:

a thermostat disposed between the engine and the radiator;

the temperature sensor is used for acquiring the current temperature of the engine in real time, the temperature sensor is in communication connection with the controller, and the controller is also used for judging the running state of the thermostat according to the current temperature;

the rotating speed sensor is used for acquiring the current rotating speed of the engine in real time, the rotating speed sensor is in communication connection with the controller, and the controller is also used for judging the running gear of the engine according to the current rotating speed.

The present invention also provides a method for diagnosing a failure of a heat dissipation system of a working machine, the device for diagnosing a failure of a heat dissipation system of a working machine according to any one of the above, comprising:

acquiring the current flow of a water outlet of the engine in real time;

and comparing the current flow with a first target flow stored in advance, and judging that the interior of the radiator is blocked if the current flow is smaller than or equal to the first target flow.

The heat radiation system fault diagnosis method of the working machine provided by the invention further comprises the following steps:

and after judging that the inside of the radiator is blocked, controlling the cleaning device to start working so as to adjust the flow of the water outlet of the engine.

The heat radiation system fault diagnosis method of the working machine provided by the invention further comprises the following steps:

acquiring the adjusted actual flow of the water outlet of the engine;

and comparing the actual flow with a second target flow stored in advance, and controlling the cleaning device to stop working if the actual flow is greater than or equal to the second target flow.

The invention also provides a working machine, comprising the cooling system fault diagnosis device of the working machine.

The invention provides a heat radiation system fault diagnosis device of a working machine, comprising: an engine; the water inlet of the engine is connected with the water outlet of the radiator; the flow sensor is used for acquiring the current flow of a water outlet of the engine in real time; and the controller is in communication connection with the flow sensor and is used for comparing the current flow with a prestored first target flow to judge whether the interior of the radiator is blocked or not, and when the current flow is smaller than or equal to the first target flow, the controller judges that the interior of the radiator is blocked.

By means of the arrangement, the blockage situation of the water channel in the radiator is confirmed by detecting the flow of the cooling liquid at the water outlet of the engine in real time and comparing the flow with the first target flow stored in the controller in advance. If the water outlet flow is lower than the first target flow, the problem of blockage of the water channel inside the radiator is indicated, so that whether the blockage occurs inside the radiator or outside the radiator can be intuitively and accurately judged, the failure removal efficiency can be improved, the blockage situation inside the radiator can be effectively judged, unnecessary manpower, material resources and time investment are avoided, and the operation efficiency of the operation machine is improved.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a heat dissipation system failure diagnosis device of a working machine according to the present invention;

FIG. 2 is a schematic illustration of a filter of a work machine according to the present disclosure;

FIG. 3 is one of the flow charts of the heat dissipation system fault diagnosis method of the work machine provided by the present invention;

FIG. 4 is a second flowchart of a method for diagnosing a heat dissipation system failure of a work machine according to the present invention;

FIG. 5 is a third flowchart of a method for diagnosing a failure of a heat dissipating system of a work machine according to the present invention;

FIG. 6 is a flowchart of a method for diagnosing a failure of a heat dissipating system of a work machine according to the present invention;

FIG. 7 is a fifth flowchart of a method for diagnosing a failure in a heat dissipating system of a work machine according to the present invention;

reference numerals:

10: an engine; 101: a thermostat; 102: a temperature sensor; 103: a rotation speed sensor; 11: a controller; 12: a flow sensor; 13: a first pipeline; 14: a first electromagnetic valve; 15: a filter; 16: a second electromagnetic valve; 17: a second pipeline; 18: a heat sink; 181: a water feeding chamber; 182: a water discharging chamber; 19: a third pipeline; 20: a display device.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The following describes a cooling system failure diagnosis device of a work machine according to the present invention with reference to fig. 1 to 7.

As shown in fig. 1 to 7, an embodiment of the present invention provides a heat radiation system failure diagnosis apparatus of a working machine, including an engine 10, a radiator 18, a flow sensor 12, and a controller 11. As shown in fig. 1, the water outlet of the engine 10 is connected with the water inlet of the radiator 18, and the water inlet of the engine 10 is connected with the water outlet of the radiator 18. Specifically, the radiator 18 includes an upper water chamber 181 and a lower water chamber 182. The coolant flows through the radiator 18 from the water outlet of the engine 10, exchanges heat, and returns to the engine 10 through the water inlet of the engine 10. In fig. 1, the direction indicated by the arrow indicates the flow direction of the coolant.

The flow sensor 12 is used to obtain the current flow of the water outlet of the engine 10 in real time, and in particular, the flow sensor 12 may be installed on the water outlet line of the engine 10. The controller 11 is communicatively connected to the flow sensor 12, for example, the controller 11 may directly utilize a complete machine controller of the work machine, and the complete machine controller is electrically connected to the flow sensor 12 and may receive flow data of the engine water outlet sent by the flow sensor 12. The controller 11 is configured to determine whether the interior of the radiator 18 is clogged based on the comparison between the current flow rate and the first target flow rate stored in advance. When the current flow rate of the engine water outlet is less than or equal to the preset first target flow rate, the controller 11 determines that the inside of the radiator 18 is blocked.

By detecting the coolant flow rate at the water outlet of the engine 10 in real time and comparing the coolant flow rate with the first target flow rate stored in the controller 11 in advance, the clogging of the water passage in the radiator 18 is confirmed. If the water outlet flow is lower than the first target flow, the problem of blockage of the water channel inside the radiator 18 is indicated, so that whether the blockage occurs inside the radiator 18 or outside the radiator 18 can be intuitively and accurately judged, the problem that the traditional radiator is not easy to detect after being blocked is solved, the failure removal efficiency can be improved, the blockage situation inside the radiator 18 can be effectively judged, unnecessary manpower, material resources and time investment are avoided, and the operation efficiency of the operation machine is improved.

In an embodiment of the present invention, the cooling system failure diagnosis device of the work machine further includes a cleaning device for cleaning impurities in the radiator 18. The cleaning device is in communication with the controller 11, and the controller 11 is further configured to control whether the cleaning device is operating after determining that a blockage has occurred in the interior of the radiator 18. That is, after it is determined that the inside of the radiator 18 is clogged, automatic cleaning can be achieved by the cleaning device to alleviate the clogged state of the radiator 18 so as to reduce the high temperature malfunction of the engine 10 as soon as possible.

So set up, can realize online self-cleaning function, can clear up the water course automatically when radiator 18 water course blocks up, can only through demolishing the change after solving traditional radiator and blockking up, not possess the problem of self-cleaning function, improve troubleshooting efficiency.

In an embodiment of the present invention, the heat dissipation system fault diagnosis device of the working machine further includes a first pipeline 13, a second pipeline 17, and a control valve. As shown in fig. 1, the first pipe 13 and the second pipe 17 are disposed in parallel between the water outlet of the engine 10 and the water inlet of the radiator 18. The cleaning device comprises a filter 15, the filter 15 being arranged on the first line 13 or the second line 17. For example, the filter 15 may be mounted on the second conduit 17. As shown in fig. 2, the filter 15 includes a filter inlet pipe 151 and a filter outlet pipe 152 through which the filter 15 is connected to the second pipe 17.

The control valve is in communication with the controller 11, the control valve is adapted to control the on-off conditions of the first and second lines 13, 17, and the control valve is switchable between a first state and a second state. In the first state, the first line 13 is conductive and the second line 17 is blocked. In the second state, the first line 13 is blocked and the second line 17 is conductive. Specifically, the control valve includes a first solenoid valve 14 and a second solenoid valve 16, and the first solenoid valve 14 and the second solenoid valve 16 are electrically connected to the controller 11 to realize automatic control of the solenoid valves.

When the heat radiation system is in a normal operation state, the controller 11 controls the first electromagnetic valve 14 to be in a normally closed state and controls the second electromagnetic valve 16 to be in a normally open state. At this time, the first pipeline 13 is turned on, the second pipeline 17 is turned off, so that the cooling liquid flows through the first pipeline 13 from the water outlet of the engine to enter the radiator 18, and returns to the engine 10 from the third pipeline 19 after heat exchange, so as to reduce the temperature of the engine 10, and ensure that the engine 10 is maintained within the normal working temperature range.

When the heat dissipation system fails to block, after judging that the block occurs in the water channel inside the radiator 18, the controller 11 controls the first electromagnetic valve 14 to open and controls the second electromagnetic valve 16 to close. At this time, the second pipe 17 is turned on, and the first pipe 13 is turned off, so that the coolant flows through the second pipe 17 from the water outlet of the engine, passes through the filter 15 to remove impurities carried in the coolant, enters the radiator 18, and finally returns to the engine 10.

So set up, through the control valve automatic switch-over connecting line, can open the filtration circulation automatically when the inside water course of radiator 18 blocks up, filter the impurity that carries in the coolant liquid under the condition that does not influence the use, reach the effect of purifying coolant liquid and water course, need not to stop operation clearance water course and filtration coolant liquid, can avoid the engine high temperature trouble that the water course blocks up and causes, and then damage the engine, can improve the operating efficiency again simultaneously, guarantee the normal work of complete machine.

As an alternative embodiment of the present invention, the heat dissipation system fault diagnosis device of the working machine further includes an alarm device, which is communicatively connected to the controller 11, and the controller 11 is further configured to control the alarm device to send alarm information after determining that the interior of the radiator 18 is blocked. That is, after it is determined that a blockage has occurred inside the radiator 18, an alarm may be issued, for example, by sound or an indicator light. So set up, confirm the inside water course of radiator 18 and block up the back, the complete machine can realize automatic alarm, in time remind the operating personnel to pay attention to follow-up, handling the trouble.

In an alternative embodiment of the present invention, the heat dissipation system fault diagnosis device of the working machine further includes a display device 20, where the display device 20 is communicatively connected to the controller 11, and the controller 11 is further configured to control the display device 20 to display fault alarm information. That is, when a clogging failure occurs in the interior of the radiator 18, the display device 20 displays failure warning information, for example, by highlighting or blinking a color. By means of the arrangement, the fault diagnosis result is directly displayed on the display, so that operators can be reminded of the fault diagnosis result at any time until the fault is removed, and the operators can be prevented from forgetting. The display device 20 may be a center control display of the work machine, or may be an external display connected to the controller 10, and is not particularly limited herein.

In the embodiment of the present invention, the heat radiation system failure diagnosis device of the working machine further includes a thermostat 101, a temperature sensor 102, and a rotation speed sensor 103. Typically, a thermostat 101 is provided between the engine 10 and the radiator 18, for example, the thermostat 101 is installed in the engine compartment for adjusting the operating temperature of the engine 10.

Temperature sensor 102 is used to obtain a current temperature T of engine 10 in real time, for example, temperature sensor 102 may be mounted on engine 10. The temperature sensor 102 is communicatively connected to the controller 11, and the controller 11 is further configured to determine an operating state of the thermostat 101 according to a current temperature. Generally, the operating states of the thermostat 101 include at least a half-open state and a full-open state, depending on the different temperatures of the engine 10. Specifically, the first preset temperature is T1, and the second preset temperature is T2, where T1 < T2. When T1 is less than or equal to T2, the thermostat 101 is in a half-open state. When T is not less than T2, the thermostat 101 is in a fully opened state. That is, it is determined that the thermostat 101 is in the half-open state or the full-open state by detecting the temperature of the engine 10.

The rotation speed sensor 103 is used to acquire the current rotation speed of the engine 10 in real time, and for example, the rotation speed sensor 103 may be mounted on the engine 10. The rotation speed sensor 103 is communicatively connected to the controller 11, and the controller 11 is further configured to determine an operating gear of the engine 10 according to the current rotation speed. Generally, the rotational speed of the engine 10 is different in different gear. The operating range of engine 10 can thus be inferred by measuring rotational speed.

Accordingly, the temperature sensor 102 may detect the temperature of the engine 10 to determine the open state of the thermostat 101, and then the flow data at the flow sensor 12 at each gear rotational speed of the engine 10 may be measured for different open states of the thermostat 101. Thus, the calibration flow of the water outlet of the engine is obtained at each gear speed of the engine and in the half-open and full-open states of the thermostat 101, and a plurality of sets of calibration flow are stored in the controller 11 in advance as first target flow data. And further, whether the radiator 18 is blocked or not can be effectively judged according to different operation conditions of the engine 10, and the measurement is more accurate. Generally, the thermostat 101 is in the closed state without detecting the engine water outlet flow.

Thus, in combination with the opened state of the thermostat 101, the complete machine controller reads the rotational speed from the rotational speed sensor 103, and then invokes the corresponding first target flow rate at the rotational speed. And compares the real-time data fed back by the flow sensor 12 with the first target flow to determine whether there is a blockage problem in the water channel inside the radiator 18.

The first target flow may be a calibrated flow measured at each gear rotational speed of the engine and in the half-open and full-open states of the thermostat 101. However, in practical application, a certain flow value may be selected as the first target flow according to the calibrated flow, and stored in the controller 11, so as to measure whether the radiator water channel is blocked under the corresponding operation condition. For example, 10% of the calibrated flow may be selected as the first target flow, and if the real-time flow is less than or equal to 10% of the calibrated flow, then blockage of the internal waterway of the radiator 18 may be determined. Thus, a suitable value of the first target flow rate may be selected according to actual design requirements, so that whether the interior of the radiator 18 is clogged or not and the degree of clogging thereof may be determined.

The method for diagnosing a cooling system fault of a working machine according to the present invention will be described below, and the method for diagnosing a cooling system fault of a working machine described below and the device for diagnosing a cooling system fault of a working machine described above may be referred to correspondingly.

The embodiment of the invention also provides a cooling system fault diagnosis method of the working machine, which is based on the cooling system fault diagnosis device of the working machine in each embodiment. Specifically, as shown in fig. 3, the diagnostic method includes:

s100: acquiring the current flow of a water outlet of the engine 10 in real time;

s200: and comparing the current flow with a pre-stored first target flow, and judging that the interior of the radiator 18 is blocked if the current flow is smaller than or equal to the first target flow.

By detecting the coolant flow rate at the water outlet of the engine 10 in real time and comparing the coolant flow rate with the first target flow rate stored in the controller 11 in advance, the clogging of the water passage in the radiator 18 is confirmed. If the water outlet flow is lower than the first target flow, the problem of blockage of the water channel inside the radiator 18 is indicated, so that whether the blockage occurs inside the radiator 18 or outside the radiator 18 can be more intuitively and accurately judged, the failure removal efficiency can be improved, the blockage situation inside the radiator 18 can be effectively judged, unnecessary manpower, material resources and time investment are avoided, and the operation efficiency of the operation machine is improved. The development process of the beneficial effects is substantially similar to that of the above-described cooling system failure diagnosis device of the working machine, and therefore will not be described in detail herein.

In an alternative embodiment of the present invention, as shown in fig. 4, the heat dissipation system fault diagnosis method of the working machine further includes:

s300: after it is determined that clogging of the inside of the radiator 18 occurs, the cleaning device is controlled to start operating to adjust the flow rate of the water outlet of the engine 10.

In particular, the cleaning device may comprise a filter 15, switched by a control valve to a second conduit 17. At this time, the controller 11 controls the first solenoid valve 14 to open, and controls the second solenoid valve 16 to close after the feedback of the opening signal of the first solenoid valve 14, so that the coolant is introduced into the filter 15 to remove impurities, and then flows into the radiator 18. Thereby achieving the effects of cleaning the water channel and filtering the cooling liquid, eliminating the blockage problem of the water channel of the radiator, and further achieving the purpose of adjusting the flow of the water outlet of the engine.

By the arrangement, after the blockage of the water channel in the radiator is determined, the filtering circulation can be automatically started, the self-cleaning effect is achieved, and the operation of cleaning the water channel and filtering the cooling liquid is not required.

Further, in an embodiment of the present invention, as shown in fig. 5, the method for diagnosing a fault of a heat dissipation system of a working machine further includes:

s400: acquiring the actual flow of the regulated water outlet of the engine 10;

s500: and comparing the actual flow with a second target flow stored in advance, and controlling the cleaning device to stop working if the actual flow is greater than or equal to the second target flow.

Specifically, after the cleaning device is operated, the clogging of the radiator 18 is alleviated, and the engine water outlet flow is increased. At this time, the adjusted actual flow of the engine water outlet is fed back and compared with the second target flow stored in advance. If the adjusted actual flow is greater than or equal to the second target flow, the cleaning device stops working, and the radiator starts a normal heat dissipation cycle. At this time, the controller 11 controls the second solenoid valve 16 to open, and controls the first solenoid valve 14 to close after feedback of the opening signal of the second solenoid valve 16.

The second target flow may be a calibrated flow measured at each gear rotational speed of the engine and in the half-open and full-open states of the thermostat 101. However, in practical application, an appropriate flow value may be selected as the second target flow according to the calibrated flow, and stored in the controller 11, so as to measure whether the cleaning device can be controlled to stop working under the corresponding operating condition. For example, the flow rate deviation can be controlled within 5%, i.e. 95% of the calibrated flow rate can be selected as the second target flow rate, and if the real-time flow rate is greater than or equal to 95% of the calibrated flow rate, the cleaning device can be controlled to stop working. Therefore, the proper value of the second target flow rate can be selected according to the actual design requirement, so as to judge whether the cleaning device can be controlled to stop working or not.

Further, as an alternative embodiment of the present invention, as shown in fig. 6, the heat dissipation system failure diagnosis method of the work machine further includes:

s201: after determining that a blockage has occurred in the interior of the radiator 18, the alarm device is controlled to issue an alarm message.

Therefore, under the condition of realizing the internal blockage fault diagnosis of the radiator 18, the automatic alarm device has an automatic alarm function, alerts operators, effectively early warns, and timely discovers and processes problems.

In an alternative embodiment of the present invention, as shown in fig. 7, the heat dissipation system fault diagnosis method of the working machine further includes:

s202: after determining that the inside of the radiator 18 is clogged, the control display device 20 displays a malfunction warning message.

Therefore, under the condition of realizing the internal blockage fault diagnosis of the radiator 18, fault alarm information can be visually seen on the display, so that operators are effectively reminded, and the operators are prevented from forgetting. The execution sequence of step S201 and step S202 is not particularly limited, and may be executed simultaneously or sequentially.

In summary, the embodiment of the invention provides a cooling system fault diagnosis device and a diagnosis method for a working machine, which are used for judging whether a water channel in a radiator is blocked or not by detecting the cooling liquid flow of an engine water outlet in each gear rotating speed, half-open and full-open states of a thermostat in real time and comparing the cooling liquid flow with a first target flow stored in advance. When the real-time flow is lower than the first target flow, the display of the whole machine sends out fault alarm information, the cleaning device starts to work automatically, cooling liquid of the heat dissipation system is filtered, and impurities carried in the cooling liquid are removed. When the flow of the water outlet of the engine returns to the normal flow range, the cleaning device stops working, and the heat radiation system operates normally.

Since the engine temperature and the radiator blockage are not sufficient conditions, that is, the engine temperature abnormality can be estimated by the radiator blockage, but the engine temperature abnormality is not necessarily caused by the radiator blockage. Through the diagnosis device and the diagnosis method in the embodiment, the blockage situation of the water channel in the radiator can be effectively and accurately judged according to the comparison between the data acquired by the flow sensor and the target data, and the high temperature of the engine is avoided.

The working machine provided by the present invention will be described below, and the working machine described below and the cooling system failure diagnosis device of the working machine described above may be referred to correspondingly to each other.

The embodiment of the invention also provides a working machine, which comprises the cooling system fault diagnosis device of the working machine in each embodiment. By detecting the coolant flow rate at the water outlet of the engine 10 in real time and comparing the coolant flow rate with the first target flow rate stored in the controller 11 in advance, the clogging of the water passage in the radiator 18 is confirmed. If the water outlet flow is lower than the first target flow, the problem of blockage of the water channel inside the radiator 18 is indicated, so that whether the blockage occurs inside the radiator 18 or outside the radiator 18 can be more intuitively and accurately judged, the failure removal efficiency can be improved, the blockage situation inside the radiator 18 can be effectively judged, unnecessary manpower, material resources and time investment are avoided, and the operation efficiency of the operation machine is improved. The development process of the beneficial effects is substantially similar to that of the above-described cooling system failure diagnosis device of the working machine, and therefore will not be described in detail herein.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A heat radiation system failure diagnosis device of a working machine, comprising:

an engine (10);

the radiator (18), the water outlet of the engine (10) is connected with the water inlet of the radiator (18), and the water inlet of the engine (10) is connected with the water outlet of the radiator (18);

a flow sensor (12) for acquiring in real time a current flow of a water outlet of the engine (10);

and the controller (11) is in communication connection with the flow sensor (12), the controller (11) is used for judging whether the interior of the radiator (18) is blocked according to comparison between the current flow and a first target flow stored in advance, and when the current flow is smaller than or equal to the first target flow, the controller (11) judges that the interior of the radiator (18) is blocked.

2. The heat dissipation system failure diagnosis device of a working machine according to claim 1, further comprising:

the cleaning device is used for cleaning impurities in the radiator (18), the cleaning device is in communication connection with the controller (11), and the controller (11) is also used for controlling whether the cleaning device works after judging that the inside of the radiator (18) is blocked.

3. The heat dissipation system failure diagnosis device of a working machine according to claim 2, further comprising:

a first pipeline (13) and a second pipeline (17) which are arranged in parallel between a water outlet of the engine (10) and a water inlet of the radiator (18), wherein the cleaning device comprises a filter (15), and the filter (15) is arranged on the first pipeline (13) or the second pipeline (17);

the control valve is in communication connection with the controller (11) and is used for controlling the on-off condition of the first pipeline (13) and the second pipeline (17), and the control valve can be switched between a first state and a second state; in the first state, the first pipeline (13) is conducted, and the second pipeline (17) is cut off; in the second state, the first line (13) is blocked and the second line (17) is connected.

4. The heat dissipation system failure diagnosis device of a working machine according to claim 1, further comprising:

and the alarm device is in communication connection with the controller (11), and the controller (11) is also used for controlling the alarm device to send alarm information after judging that the inside of the radiator (18) is blocked.

5. The heat dissipation system failure diagnosis device of a working machine according to claim 1, further comprising:

and the display device (20) is in communication connection with the controller (11), and the controller (11) is also used for controlling the display device (20) to display fault alarm information.

6. The heat dissipation system failure diagnosis device of a working machine according to claim 1, further comprising:

a thermostat (101) provided between the engine (10) and the radiator (18);

the temperature sensor (102) is used for acquiring the current temperature of the engine (10) in real time, the temperature sensor (102) is in communication connection with the controller (11), and the controller (11) is also used for judging the running state of the thermostat (101) according to the current temperature;

the rotating speed sensor (103) is used for acquiring the current rotating speed of the engine (10) in real time, the rotating speed sensor (103) is in communication connection with the controller (11), and the controller (11) is also used for judging the running gear of the engine (10) according to the current rotating speed.

7. A heat radiation system failure diagnosis method of a working machine, characterized by comprising, based on the heat radiation system failure diagnosis device of a working machine according to any one of claims 2 to 6:

acquiring the current flow of a water outlet of the engine (10) in real time;

and comparing the current flow with a first target flow stored in advance, and judging that the interior of the radiator (18) is blocked if the current flow is smaller than or equal to the first target flow.

8. The method for diagnosing a heat dissipation system failure of a work machine according to claim 7, further comprising:

after the internal blockage of the radiator (18) is judged, the cleaning device is controlled to start working so as to adjust the flow rate of the water outlet of the engine (10).

9. The method for diagnosing a heat dissipation system failure of a work machine according to claim 8, further comprising:

acquiring the adjusted actual flow of the water outlet of the engine (10);

and comparing the actual flow with a second target flow stored in advance, and controlling the cleaning device to stop working if the actual flow is greater than or equal to the second target flow.

10. A work machine comprising the heat radiation system failure diagnosis device of any one of claims 1 to 6.