An adaptive control method and system for a mining refrigeration air conditioner and a construction machine

Abstract

The application discloses a kind of excavator refrigeration air conditioner's adaptive control method, system and engineering machinery, belong to engineering machinery technical field, the control method includes: judge whether current environment temperature needs to start air conditioner;If yes, start air conditioner, and judge whether current radiator fan wind speed and radiator fan rotating speed have correlation according to current engine operating state;If yes, judge whether current radiator fan wind speed is greater than preset fan wind speed, if no, adjust engine speed to radiator fan wind speed reaches preset fan wind speed;If no, judge whether current radiator fan wind speed is greater than preset fan wind speed, if no, judge whether radiator fan is failure according to current engine operating state, if no, adjust engine speed to radiator fan wind speed reaches preset fan wind speed, solve the problem that excavator idling or low speed travel air conditioner refrigeration effect is not good and engine flameout.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, and particularly relates to a self-adaptive control method and system of a cooling air conditioner of an excavator and an engineering machinery. BACKGROUND

[0002] The market demand for electric excavators is gradually increasing due to their zero emission, good environmental protection performance, low use and maintenance cost, etc. In order to make the driving environment more comfortable, an air conditioner is provided in the cab of the electric excavator. However, when the engine is idling, low-speed driving or low load, the opening of the air conditioner will increase the engine load, cause the idle speed to be unstable, and even cause the engine to stall. When the engine is idling, low-speed driving or low load, the poor heat dissipation of the air conditioner condenser will cause the condensing temperature or pressure to abnormally rise, resulting in poor air conditioning refrigeration effect, and even compressor damage due to excessive pressure, and the engine is prone to overheating. When the engine is idling or low-speed driving, the generator power is insufficient, the refrigeration system increases the power load, and the use of other electrical equipment is affected.

[0003] Therefore, it is necessary to provide a control method to enable the air conditioner and the engine to work normally when the excavator is idling or low-speed driving. SUMMARY

[0004] The present application provides a self-adaptive control method and system of a cooling air conditioner of an excavator and an engineering machinery, which solves the problems of poor air conditioning refrigeration effect and engine stall when the excavator is idling or low-speed driving by first judging the correlation between the radiator fan wind speed and the radiator fan speed, and then adjusting the engine speed according to the judgment result and the current engine operating state to make the radiator fan wind speed reach the preset fan wind speed.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a self-adaptive control method of a cooling air conditioner of an excavator, comprising:

[0007] determining whether the current ambient temperature requires opening of the air conditioner;

[0008] if not, the air conditioner is not opened, and the current engine speed is maintained;

[0009] if yes, the air conditioner is opened, and it is determined whether there is a correlation between the current radiator fan wind speed and the radiator fan speed according to the current engine operating state;

[0010] if yes, it is determined whether the current radiator fan wind speed is greater than the preset fan wind speed, if yes, the current engine speed is maintained, and if no, the current engine speed is adjusted according to the current engine operating state until the current radiator fan wind speed reaches the preset fan wind speed;

[0011] If no, judging whether the current radiator fan wind speed is greater than the preset fan wind speed, if yes, keeping the current engine speed, if no, judging whether the radiator fan is faulty according to the current engine operating state, if no, adjusting the current engine speed according to the current engine operating state until the current radiator fan wind speed reaches the preset fan wind speed.

[0012] Optionally, the judging whether the current environment temperature needs to start the air conditioner comprises: acquiring a real-time environment temperature value and comparing it with a preset temperature value H, if the real-time environment temperature value is not less than the preset temperature value H, the air conditioner needs to be started, and if the real-time environment temperature value is less than the preset temperature value H, the air conditioner does not need to be started.

[0013] Optionally, the judging whether the current radiator fan wind speed and the radiator fan speed have a correlation according to the current engine operating state comprises:

[0014] obtaining the current engine operating state according to the current engine speed and the whole machine load rate;

[0015] When the engine is in an idle speed operating state or a low speed and low load rate operating state, judging whether the current radiator fan wind speed and the radiator fan speed satisfy a preset linear relationship v1=k×m1+▽p, wherein v1 is the radiator fan wind speed under the engine idle speed or low speed and low load rate operating state, m1 is the radiator fan speed under the engine idle speed or low speed and low load rate operating state,▽p is an error coefficient, and k is a correlation coefficient, if yes, the current radiator fan wind speed and the radiator fan speed have a correlation, and if no, the current radiator fan wind speed and the radiator fan speed do not have a correlation.

[0016] And / or, when the engine is in a low speed and high load rate operating state, judging whether the current radiator fan wind speed and the radiator fan speed satisfy a preset linear relationship v2=k×m2+▽p, wherein v2 is the radiator fan wind speed under the engine low speed and high load rate operating state, m2 is the radiator fan speed under the engine low speed and high load rate operating state, if yes, the current radiator fan wind speed and the radiator fan speed have a correlation, and if no, the current radiator fan wind speed and the radiator fan speed do not have a correlation.

[0017] Optionally, the obtaining the current engine operating state according to the current engine speed and the whole machine load rate comprises:

[0018] acquiring an engine real-time speed value and a whole machine real-time load rate, and comparing the engine real-time speed value with a preset engine speed value s and comparing the whole machine real-time load rate with a preset whole machine load rate z%;

[0019] When the engine real-time speed value is the engine minimum speed value, the current engine is in an idle running state;

[0020] When the engine real-time speed value is less than the preset engine speed value s and the real-time load rate of the whole machine is less than z%, the current engine is in a low-speed and low-load rate running state;

[0021] When the engine real-time speed value is less than the preset engine speed value s and the real-time load rate of the whole machine is not less than z%, the current engine is in a low-speed and high-load rate running state.

[0022] Optionally, the judging whether the current radiator fan wind speed reaches the preset fan wind speed comprises:

[0023] acquiring the real-time radiator fan wind speed and comparing it with the preset fan wind speed v(t);

[0024] The preset fan wind speed v(t) is obtained by:

[0025] setting a temperature range (t1, t2), wherein t2=t1+n▽t, and▽t is a preset temperature interval;

[0026] acquiring the radiator fan wind speed every▽t in the temperature range (t1, t2);

[0027] calculating the average value of all the radiator fan wind speed values obtained in the temperature range (t1, t2) to obtain the preset fan wind speed v(t)=(v(t1)+v(t1+▽t)+...+v(t1+(n-1)▽t)) / n.

[0028] Optionally, the adjusting the current engine speed according to the current engine running state until the current radiator fan wind speed is greater than the preset fan wind speed comprises:

[0029] When the engine is in an idle running state or a low-speed and low-load rate running state, acquiring the engine speed x1 at the time when the air conditioner is turned on, increasing the engine speed by a preset speed increment on the basis of x1 each time and acquiring the radiator fan wind speed value corresponding to each speed increase until the radiator fan wind speed reaches the preset fan wind speed;

[0030] and / or, when the engine is in a low-speed and high-load rate running state, acquiring the engine speed h1 at the time when the air conditioner is turned on, increasing the engine speed by a preset speed increment on the basis of h1 each time and acquiring the radiator fan wind speed value corresponding to each speed increase until the radiator fan wind speed reaches the preset fan wind speed.

[0031] Optionally, the judging whether the radiator fan is faulty according to the current engine running state comprises:

[0032] When the engine is in an idle running state or a low-speed low-load rate running state, an engine speed x1 at a time when the air conditioner is turned on is obtained, the engine speed is increased by a preset speed increment each time on the basis of x1 and an engine speed x2 at a current time is obtained, it is judged whether (x2-x1) / x1 is less than a ratio a% of a maximum allowed engine speed increment to an initial engine speed value in the idle or low-speed low-load rate running state, if not greater than a%, the radiator fan is not faulty, and if greater than a%, the radiator fan is faulty.

[0033] And / or, when the engine is in a low-speed high-load rate running state, an engine speed h1 at a time when the air conditioner is turned on is obtained, the engine speed is increased by a preset speed increment each time on the basis of h1 and an engine speed h2 at a current time is obtained, it is judged whether (h2-h1) / h1 is less than a ratio b% of a maximum allowed engine speed increment to an initial engine speed value in the low-speed high-load rate running state, if not greater than b%, the radiator fan is not faulty, and if greater than b%, the radiator fan is faulty.

[0034] Optionally, when the engine is in an idle running state or a low-speed low-load rate running state, the engine speed is increased by △x1 each time, and the cumulative engine speed increment is n1△x1, and when the engine is in a low-speed high-load rate running state, the engine speed is increased by △x2 each time, and the cumulative engine speed increment is n2△x2, wherein n1△x1

[0035] In a second aspect, the present application provides a self-adaptive control system of a refrigeration air conditioner of an excavator, comprising: an ambient temperature sensor, a radiator fan speed sensor, a radiator fan wind speed sensor and a controller.

[0036] The ambient temperature sensor is arranged in the body of the excavator and is used for monitoring a real-time ambient temperature value of the excavator.

[0037] The radiator fan speed sensor is arranged on the radiator fan and is used for monitoring a real-time radiator fan speed.

[0038] The radiator fan wind speed sensor is arranged on the radiator fan and is used for monitoring a real-time radiator fan wind speed.

[0039] The controller is configured to: collect the real-time ambient temperature value, the real-time radiator fan speed and the real-time radiator fan wind speed monitored by the ambient temperature sensor, the radiator fan speed sensor and the radiator fan wind speed sensor respectively, and collect a real-time engine speed, and execute the self-adaptive control method of the refrigeration air conditioner of the excavator as described in the first aspect.

[0040] In a third aspect, the present application provides an engineering machine, which applies the adaptive control method of the excavator refrigeration air conditioner as described in the first aspect.

[0041] Compared with the prior art, the present application has the following beneficial effects: whether the air conditioner needs to be started is determined by real-time environmental temperature, when the environmental temperature is higher than the preset temperature value and the engine is idling, the air conditioner cannot be turned off, at this time, the correlation of the radiator fan wind speed and the radiator fan rotating speed is determined, and the engine rotating speed is adjusted according to the determination result and the current engine operating state, so that the radiator fan wind speed reaches the preset fan wind speed under different engine operating states and different radiator fan working conditions, and the problems of unstable idling, engine stall, poor refrigeration effect of the air conditioner when started, and fan failure cannot be identified are solved by increasing the engine rotating speed. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 Fig. 1 shows a flow chart of the adaptive control method of the excavator refrigeration air conditioner in an embodiment of the present application;

[0043] Figure 2 Fig. 2 shows a framework diagram of the adaptive control system of the excavator refrigeration air conditioner in an embodiment of the present application.

[0044] In the figure: 01, instrument; 02, controller; 03, environmental temperature sensor; 04, engine; 05, air conditioner; 06, radiator fan rotating speed sensor; 07, radiator fan wind speed sensor. DETAILED DESCRIPTION

[0045] The present application will be further described below in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0047] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] Embodiment 1

[0049] The embodiment provides an adaptive control method of the excavator refrigeration air conditioner 05, comprising:

[0050] determining whether the current environment temperature needs to start the air conditioner 05;

[0051] If not, the air conditioner 05 is not started, and the current engine 04 rotating speed is maintained;

[0052] If yes, the air conditioner 05 is started, and it is determined whether there is a correlation between the current radiator fan wind speed and the radiator fan rotating speed according to the current engine 04 operating state;

[0053] If yes, it is determined whether the current radiator fan wind speed is greater than the preset fan wind speed, if yes, the current engine 04 rotating speed is maintained, and if not, the current engine 04 rotating speed is adjusted according to the current engine 04 operating state until the current radiator fan wind speed reaches the preset fan wind speed;

[0054] If not, it is determined whether the current radiator fan wind speed is greater than the preset fan wind speed, if yes, the current engine 04 rotating speed is maintained, and if not, it is determined whether the radiator fan is faulty according to the current engine 04 operating state, if not, the current engine 04 rotating speed is adjusted according to the current engine 04 operating state until the current radiator fan wind speed reaches the preset fan wind speed.

[0055] Embodiment 2

[0056] On the basis of embodiment 1, the embodiment further makes the following design.

[0057] As shown in Figure 1 The control method is divided into a control process in the engine 04 idling driving state and a control process in the engine 04 low-speed driving state, and the specific steps are as follows.

[0058] When the engine 04 idles, the real-time environment temperature value, the real-time radiator fan rotating speed, the real-time radiator fan wind speed and the real-time engine 04 rotating speed are collected, and the real-time environment temperature value is compared with the preset temperature value H;

[0059] When the current ambient temperature value is lower than the preset temperature value H, the air conditioner 05 is not turned on, and the engine 04 speed is kept unchanged;

[0060] When the current ambient temperature value is higher than the preset temperature value H, the air conditioner 05 is turned on, and the engine 04 speed x1 at this time is recorded, the radiator fan speed m1 at this time is recorded, the radiator fan speed v1 at this time is recorded, and it is judged whether v1=kxm1+▽p is established, wherein k is a correlation coefficient, and▽p is an error coefficient;

[0061] If v1=kxm1+▽p, it is judged whether the current radiator fan speed is greater than the preset fan speed v(t). If it is greater than the preset fan speed v(t), the whole machine works normally. If it is less than the preset fan speed v(t), the engine 04 speed is increased by▽x1 every time on the basis of the engine 04 speed x1 until the radiator fan speed is greater than the preset fan speed v(t), and the whole machine works normally.

[0062] If v1(t)≠kxm1+▽p, it is judged whether the radiator fan speed is greater than the preset fan speed v(t). If it is greater than the preset fan speed v(t), the whole machine works normally. If it is less than the preset fan speed v(t), the engine 04 speed is continuously increased by▽x1 on the basis of the engine 04 speed x1, the engine 04 speed x2 at this time is recorded, and it is judged whether (x2-x1) / x1 is less than a%. If it is less than a%, it is continuously judged whether the radiator fan speed is greater than the preset fan speed until the radiator fan speed is greater than the preset fan speed, and the whole machine works normally. If (x2-x1) / x1 is greater than a%, it is judged that the fan is faulty and needs to be repaired or replaced, wherein a% is the ratio of the maximum engine 04 speed increment to the initial engine 04 speed value under the conditions of idling and low speed and low load rate.

[0063] When the engine 04 is running at low speed, if the engine 04 load rate is less than the preset load rate z%, the air conditioner 05 is controlled according to the engine 04 idling condition; when the engine 04 load rate is greater than the preset load rate z%, the real-time ambient temperature value, the real-time radiator fan speed, the real-time radiator fan speed and the real-time engine 04 speed are collected, and the real-time ambient temperature value is compared with the preset temperature value H;

[0064] When the current ambient temperature value is lower than the preset temperature value H, the air conditioner 05 is not turned on, and the engine 04 speed is kept unchanged;

[0065] When the current ambient temperature value is higher than the preset temperature value H, the air conditioner 05 is turned on, and the engine 04 speed h1 at this time is recorded, the radiator fan speed m2 at this time is recorded, the radiator speed v2 at this time is recorded, and it is judged whether v2=kxm2+▽p is established, wherein k is a correlation coefficient, and▽p is an error coefficient;

[0066] If v2 = k x m2 +△p, determine whether the current radiator fan speed is greater than the preset fan speed v(t). If it is greater than the preset fan speed v(t), the machine works normally. If it is less than the preset fan speed v(t), increase the engine 04 speed by △x2 based on the engine 04 speed x2 until the radiator fan speed is greater than the preset fan speed v(t), and the machine works normally.

[0067] If v2(t)≠k x m2 +△p, determine whether the radiator fan speed is greater than the preset fan speed v(t). If it is greater than the preset fan speed v(t), the machine works normally. If it is less than the preset fan speed v(t), increase the engine 04 speed by △x2 based on the engine 04 speed x2, and record the engine 04 speed h2 at this time. Determine whether (h2-h1) / h1 is less than b%. If it is less than b%, continue to determine whether the radiator fan speed is greater than the preset fan speed v(t) until the radiator fan speed is greater than the preset fan speed v(t) and the machine works normally. If (h2-h1) / h1 is greater than b%, determine that the fan is faulty and needs to be repaired or replaced, where b% is the ratio of the maximum allowed engine 04 speed increment to the initial engine 04 speed value under the condition of low-speed high-load rate.

[0068] Let the preset engine 04 speed value be s, i.e. the maximum value at low speed. Under the condition of low speed, when the engine 04 speed value is less than s, the preset machine load rate is z%. When the machine load rate is less than z%, i.e. the engine 04 runs at low speed and low load rate, the engine 04 speed is increased by △x1 each time, and the cumulative engine 04 speed is n1△x1. When the machine load rate is greater than z%, i.e. the engine 04 runs at low speed and high load rate, the engine 04 speed is increased by △x2 each time, and the cumulative engine 04 speed is n2△x2, where n1△x1 < n2△x2.

[0069] Consider the same wind area of air conditioner 05 refrigerant, air conditioner 05 refrigerant pipe, set the environment temperature range (t1, t2), between (t1, t1+▽t) is the first▽t temperature interval, collect the radiator fan speed v (t1) in the temperature interval, between (t1+▽t, t1+2▽t) is the second▽t temperature interval, collect the radiator fan speed v (t1+▽t) in the temperature interval, between (t1+(n-1)▽t, t1+n▽t) is the nth▽t temperature interval, collect the radiator fan speed v (t1+(n-1)▽t) in the temperature interval, set t1+n▽t=t2, store the radiator fan speed collected in the temperature range (t1, t2), set the preset radiator fan speed value v (t) equal to the average value of the radiator fan speed in the temperature range (t1, t2), that is, v (t)=(v (t1)+v (t1+▽t)+...+v (t1+(n-1)▽t)) / n.

[0070] Embodiment 3

[0071] As Figure 2 shown, the embodiment provides a self-adaptive control system for excavator refrigeration air conditioner, comprising: an environment temperature sensor 03, a radiator fan speed sensor 06, a radiator fan speed sensor 07, an instrument 01 and a controller 02;

[0072] The environment temperature sensor 03 is arranged in the driving environment, the radiator fan speed sensor 06 and the radiator fan speed sensor 07 are arranged on the radiator fan of the air conditioner 05 respectively, the instrument 01 is provided with a preset temperature value H function and a preset load rate z% function, the environment temperature is monitored in real time by the environment temperature sensor 03, the radiator fan speed m is monitored by the radiator fan speed sensor 06, the radiator fan speed v is monitored by the radiator fan speed sensor 07, and the preset temperature value H is adjusted by the instrument 01, the controller 02 executes the self-adaptive control method of the excavator refrigeration air conditioner described in embodiment 2 according to the preset temperature value H and the preset load rate z% displayed on the instrument 01, and controls the speed of the engine 04 to control the speed of the radiator fan of the air conditioner 05.

[0073] Embodiment 4

[0074] The embodiment provides an engineering machinery, which applies the self-adaptive control method of the excavator refrigeration air conditioner in embodiment 2.

[0075] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are merely illustrative, but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, and these all belong to the protection of the present application.

Claims

1. An adaptive control method for a mining refrigeration air conditioner, characterized by, Comprise: Judge whether the current environment temperature needs to start air conditioner (05); If not, do not start air conditioner (05), and keep the current engine (04) speed; If yes, start air conditioner (05), and judge whether the current radiator fan speed and the radiator fan speed have correlation according to the current engine (04) running state; If yes, judge whether the current radiator fan speed is greater than the preset fan speed, if yes, keep the current engine (04) speed, if not, adjust the current engine (04) speed according to the current engine (04) running state until the current radiator fan speed reaches the preset fan speed; If not, judge whether the current radiator fan speed is greater than the preset fan speed, if yes, keep the current engine (04) speed, if not, judge whether the radiator fan is fault according to the current engine (04) running state, if not, adjust the current engine (04) speed according to the current engine (04) running state until the current radiator fan speed reaches the preset fan speed; The current engine (04) running state is obtained according to the current engine (04) speed and the whole machine load rate; When the engine (04) is in idle running state or low speed and low load rate running state, judge whether the current radiator fan speed and the radiator fan speed satisfy the preset linear relationship v1=k×m1+▽p, wherein v1 is the radiator fan speed under the engine (04) idle or low speed and low load rate running state, m1 is the radiator fan speed under the engine (04) idle or low speed and low load rate running state, △p is error coefficient, k is correlation coefficient, if yes, the current radiator fan speed and the radiator fan speed have correlation, if not, the current radiator fan speed and the radiator fan speed do not have correlation; When the engine (04) is in low speed and high load rate running state, judge whether the current radiator fan speed and the radiator fan speed satisfy the preset linear relationship v2=k×m2+▽p, wherein v2 is the radiator fan speed under the engine (04) low speed and high load rate running state, m2 is the radiator fan speed under the engine (04) low speed and high load rate running state, if yes, the current radiator fan speed and the radiator fan speed have correlation, if not, the current radiator fan speed and the radiator fan speed do not have correlation. The current environment temperature is judged whether needs to start air conditioner (05), comprising: obtaining real-time environment temperature value, and comparing it with preset temperature value H, if the real-time environment temperature value is not less than the preset temperature value H, needs to start air conditioner (05), if the real-time environment temperature value is less than the preset temperature value H, does not need to start air conditioner (05).

2. The adaptive control method of a mining refrigeration air conditioner according to claim 1, characterized in that, The current engine (04) running state is obtained according to the current engine (04) speed and the whole machine load rate, comprising:

3. The adaptive control method of a mining refrigeration air conditioner according to claim 1, characterized in that, ​ Obtaining the real-time engine (04) speed value and the real-time engine load rate, and comparing the real-time engine (04) speed value with the preset engine (04) speed value s and comparing the real-time engine load rate with the preset engine load rate z%; When the real-time engine (04) speed value is the minimum engine (04) speed value, the current engine (04) is in an idle running state; When the real-time engine (04) speed value is less than the preset engine (04) speed value s and the real-time engine load rate is less than z%, the current engine (04) is in a low-speed and low-load rate running state; When the real-time engine (04) speed value is less than the preset engine (04) speed value s and the real-time engine load rate is not less than z%, the current engine (04) is in a low-speed and high-load rate running state.

4. The adaptive control method of a mining refrigeration air conditioner according to claim 1, characterized in that, The method for judging whether the current radiator fan speed reaches the preset fan speed v(t) comprises: Obtaining the real-time radiator fan speed and comparing it with the preset fan speed v(t); The method for obtaining the preset fan speed v(t) comprises: Setting a temperature range (t1, t2), wherein t2=t1+n▽t, and▽t is a preset temperature interval; Obtaining the radiator fan speed every▽t in the temperature range (t1, t2); Calculating the average value of all the radiator fan speed values obtained in the temperature range (t1, t2) to obtain the preset fan speed v(t)=(v(t1)+v(t1+▽t)+...+v(t1+(n-1)▽t)) / n.

5. The method of adaptive control of a mining refrigeration air conditioner according to any one of claims 3 or 4, characterized in that, The method for adjusting the current engine (04) speed according to the current engine (04) running state until the current radiator fan speed is greater than the preset fan speed v(t) comprises: When the engine (04) is in an idle running state or a low-speed and low-load rate running state, obtaining the engine (04) speed x1 at the time when the air conditioner (05) is turned on, increasing the engine (04) speed by a preset speed increment on the basis of x1 each time, obtaining the radiator fan speed value corresponding to each speed increase, and stopping until the radiator fan speed reaches the preset fan speed; When the engine (04) is in a low-speed and high-load rate running state, obtaining the engine (04) speed h1 at the time when the air conditioner (05) is turned on, increasing the engine (04) speed by a preset speed increment on the basis of h1 each time, obtaining the radiator fan speed value corresponding to each speed increase, and stopping until the radiator fan speed reaches the preset fan speed.

6. The adaptive control method of a mining refrigeration air conditioner according to claim 5, characterized in that, The method for judging whether the radiator fan is faulty according to the current engine (04) running state comprises: When the engine (04) is in idle running state or low-speed low-load rate running state, the engine (04) speed x1 at the time when the air conditioner (05) is turned on is obtained, the engine (04) speed is increased by a preset speed increment each time on the basis of x1, and the engine (04) speed x2 at the current time is obtained, it is judged whether (x2-x1) / x1 is less than a% which is the ratio of the maximum allowed engine (04) speed increment to the initial engine (04) speed value in the idle or low-speed low-load rate running state, if not greater than a%, the radiator fan is not faulty, if greater than a%, the radiator fan is faulty; When the engine (04) is in low-speed high-load rate running state, the engine (04) speed h1 at the time when the air conditioner (05) is turned on is obtained, the engine (04) speed is increased by a preset speed increment each time on the basis of h1, and the engine (04) speed h2 at the current time is obtained, it is judged whether (h2-h1) / h1 is less than b% which is the ratio of the maximum allowed engine (04) speed increment to the initial engine (04) speed value in the low-speed high-load rate running state, if not greater than b%, the radiator fan is not faulty, if greater than b%, the radiator fan is faulty.

7. The adaptive control method of a mining refrigeration air conditioner according to claim 6, characterized in that, When the engine (04) is in idle running state or low-speed low-load rate running state, the engine (04) speed is increased by▽x1 each time, and the cumulative engine (04) speed increment is n1▽x1, when the engine (04) is in low-speed high-load rate running state, the engine (04) speed is increased by▽x2 each time, and the cumulative engine (04) speed increment is n2▽x2, wherein n1▽x1 8. An adaptive control system for a mining refrigeration air conditioner, characterized by It comprises: an ambient temperature sensor (03), a radiator fan speed sensor (06), a radiator fan wind speed sensor (07), and a controller (02); The ambient temperature sensor (03) is arranged in the excavator body and is used for monitoring the real-time ambient temperature value of the excavator; The radiator fan speed sensor (06) is arranged on the radiator fan and is used for monitoring the real-time radiator fan speed; The radiator fan wind speed sensor (07) is arranged on the radiator fan and is used for monitoring the real-time radiator fan wind speed; The controller (02) is configured to collect the real-time ambient temperature value, the real-time radiator fan speed, and the real-time radiator fan wind speed monitored by the ambient temperature sensor (03), the radiator fan speed sensor (06), and the radiator fan wind speed sensor (07) respectively, and collect the real-time engine (04) speed, and execute the adaptive control method of the excavator refrigeration air conditioner according to any one of claims 1 to 7.

9. A working machine, characterized in that The adaptive control method of the excavator refrigeration air conditioner according to any one of claims 1 to 7 is applied.

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