Temperature control system and method for cab of excavator in plateau alpine region and excavator

Abstract

The application discloses a highland alpine region excavator cab temperature control system and method and excavator, comprising the following steps: S1, the controller receives the cab information obtained by the cab information acquisition device, the air conditioner information obtained by the air conditioner information acquisition device, and the temperature upper limit value in the cab is obtained; S2, the controller judges whether the temperature in the cab is lower than the temperature upper limit value in the cab information, if lower than the temperature upper limit value, the air conditioner in the cab is controlled to enter the heating mode; when the temperature in the cab is not lower than the temperature upper limit value, or the temperature in the cab is not lower than the set air conditioner temperature and the air conditioner outlet heating capacity is very hot, the air conditioner exits the heating mode. The cab temperature control system of the application is suitable for the highland alpine region air conditioner to enter or exit the heating mode, quickly improves the temperature in the cab, and further meets the heating demand of the user.

Description

Technical Field

[0001] This invention relates to a temperature control system, method, and excavator for the cab of an excavator in high-altitude and cold regions, and belongs to the field of excavator temperature control technology. Background Technology

[0002] Currently, the air conditioning systems in excavator cabs only focus on heating temperature, and the control methods for switching the air conditioning on or off in heating mode are simplistic. Faced with harsh environments such as high altitude, cold, lack of oxygen, and strong ultraviolet radiation, the heating performance of existing excavator cab air conditioning systems is severely challenged and cannot meet the comfort requirements of the cab.

[0003] Existing patent CN103868201A discloses a high-speed train air conditioning control method suitable for cold environments, which involves the air conditioning system controller receiving signals from an external temperature sensor, identifying the ambient temperature, and when the external temperature sensor of the vehicle's air conditioning system identifies the average ambient temperature T... 外 Below the set value T d When T is reached, the air conditioning system switches to the control program of "high-altitude cold environment - heating equipment operation control logic"; otherwise, the air conditioning system executes the conventional automatic control logic. 外 If the temperature difference changes abruptly by ≥ΔT within a time interval ≤S1(min), the air conditioning system enters the "high-altitude cold environment - low-temperature vehicle maintenance control logic" program. If T 外 ≤T f Activate the air conditioning system's anti-freeze mode. This solution only focuses on the temperature variable, making it unsuitable for all systems.

[0004] Another patent, Air Conditioning and Environmental Parameter Control Method (CN114738981A), discloses an air conditioner comprising: a sensor unit for acquiring temperature, humidity, gas composition parameters, and light intensity within the laboratory; a control unit for determining temperature adjustment commands, humidity adjustment commands, gas composition adjustment commands, and light intensity adjustment commands based on the temperature, humidity, gas composition parameters, and light intensity within the laboratory, as well as the growth environment parameter curves of the plants to be cultivated within the laboratory; a temperature control unit for executing temperature control commands to adjust the temperature within the laboratory; and a communication unit for sending humidity adjustment commands to a humidity control device, gas composition adjustment commands to a gas generator, and light intensity adjustment commands to a sunlight simulator. This solution does not address the influencing factors affecting the air conditioner itself, such as laboratory area, structure, or the operation mode of the air conditioner compressor, resulting in poor performance in high-altitude and cold regions. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a temperature control system, method, and excavator for excavator cabs in high-altitude and cold regions, which meets the heating needs of cab air conditioning in high-altitude and cold regions and rapidly increases the cab temperature.

[0006] To achieve the above objectives, the present invention employs a method for controlling the temperature of an excavator cab in high-altitude and cold regions, comprising the following steps:

[0007] S1. The controller receives cab information transmitted by the cab information acquisition device and air conditioning information transmitted by the air conditioning information acquisition device, and obtains the upper limit value of the temperature inside the cab.

[0008] The cab information includes cab volume, cab altitude, cab temperature, cab relative humidity, cab wind speed, cab outdoor ambient temperature, cab outdoor relative humidity, and cab outdoor wind speed.

[0009] The air conditioning information includes the indoor design temperature, air inlet location, air inlet temperature, air inlet wind speed, air inlet relative humidity, air outlet location, air outlet temperature, air outlet wind speed, and air outlet relative humidity.

[0010] S2. The controller determines whether the temperature inside the cab is lower than the upper temperature limit in the cab information. If it is lower than the upper temperature limit, the controller controls the air conditioner inside the cab to enter the heating mode.

[0011] When the controller determines that the temperature inside the driver's cab is not lower than the upper limit of the temperature, or when the temperature inside the driver's cab is not lower than the set air conditioning temperature and the heating capacity of the air conditioning vents is very hot, the air conditioning will exit the heating mode.

[0012] As an improvement, the controller determines whether the current temperature inside the driver's cab is lower than the air conditioning temperature set by the driver. If it is not lower, then condition one for the air conditioning to exit heating mode is met.

[0013] The controller obtains the current air outlet temperature and the current air inlet temperature based on the air conditioning information, and then obtains the current air inlet and outlet temperature difference. The controller determines whether the current air inlet and outlet temperature difference is lower than 20℃. If it is not lower, then the second condition for the air conditioner to exit the heating mode is met.

[0014] The controller determines whether the current air outlet wind speed is lower than the lower limit of the air outlet wind speed. If it is not lower, then the third condition for the air conditioner to exit the heating mode is met.

[0015] The controller calculates the heating capacity of the air conditioner outlet based on the current air conditioner outlet temperature, current air conditioner outlet wind speed, and current air conditioner outlet relative humidity. When the air conditioner outlet heating capacity is very hot, the fourth condition for the air conditioner to exit heating mode is met.

[0016] When conditions one, two, three, and four above are met simultaneously, the air conditioner will exit heating mode.

[0017] As an improvement, the controller generates a first function based on cab information and air conditioning information, and obtains the upper limit value of temperature through the first function;

[0018] The first function uses the cab volume as the first independent variable, the altitude of the cab as the second independent variable, the cab temperature as the third independent variable, the outdoor ambient temperature as the fourth independent variable, the air conditioning indoor design temperature as the fifth independent variable, the air conditioning inlet temperature as the sixth independent variable, the air conditioning outlet temperature as the seventh independent variable, and the upper limit of the cab temperature as the first dependent variable. The first function model F1 is fitted and established as shown in equation (1):

[0019] T max =F1(a,h,T3,T4,T5,T6,T7) (1);

[0020] Where: a is the volume of the cab; h is the altitude of the cab; T3 is the temperature inside the cab; T4 is the ambient temperature outside the cab; T5 is the design temperature of the air conditioning system; T6 is the air conditioning inlet temperature; T7 is the air conditioning outlet temperature; T max This represents the upper limit of the temperature inside the driver's cab.

[0021] As an improvement, the controller obtains the real-time changing temperature difference between the air conditioner's inlet and outlet based on the second function;

[0022] The second function uses the temperature difference between the air conditioner's inlet and outlet as the second dependent variable to establish a second function model, as shown in equation (2):

[0023] T a =T7-T6 (2);

[0024] In the formula: T a This refers to the temperature difference between the air inlet and outlet of the air conditioner.

[0025] As an improvement, the controller generates a third function based on the cab information and air conditioning information, and obtains the lower limit value of the air conditioning outlet wind speed through the third function;

[0026] The third function uses the cab volume as the first independent variable, the altitude of the cab as the second independent variable, the wind speed inside the cab as the eighth independent variable, the wind speed outside the cab as the ninth independent variable, the wind speed at the air conditioning inlet as the tenth independent variable, the wind speed at the air conditioning outlet as the eleventh independent variable, and the lower limit of the wind speed at the air conditioning outlet as the third dependent variable. The third function model F3 is fitted and established as shown in equation (3):

[0027] v min =F3(a,h,v8,v9,v) 10 ,v 11 (3);

[0028] In the formula: a is the volume of the cab; h is the altitude of the cab; v8 is the wind speed inside the cab; v9 is the wind speed outside the cab; v 10 The airflow velocity at the air conditioner inlet; v 11 The airflow speed at the air conditioner outlet; v min This is the lower limit of the airflow velocity at the air conditioner outlet.

[0029] As an improvement, the controller obtains the current air outlet temperature, current air outlet wind speed, and current air outlet relative humidity based on the air conditioning information, and establishes a calculation function model for the heating capacity of the air outlet, as shown in equation (4):

[0030]

[0031] In the formula: V heat f1 represents the heating capacity of the air conditioner outlet; f2 represents the relative humidity of the air conditioner outlet.

[0032] As an improvement, when 70≤V heat When V < 75, the heating capacity is moderate; when V ≤ 75, the heating capacity is moderate. heat When V < 80, the heating capacity is warm; when V ≤ 80, the heating capacity is warm. heat When V < 85, the heating capacity is heat; when V ≤ 85, the heating capacity is heat. heat At that time, the heating capacity is very hot.

[0033] In addition, the present invention also provides a temperature control system for the excavator cab in high-altitude and cold regions, used to implement the aforementioned method for controlling the temperature of the excavator cab in high-altitude and cold regions, comprising:

[0034] The cab information acquisition device is used to acquire cab information, including cab volume, cab altitude, cab temperature, cab relative humidity, cab wind speed, cab outdoor ambient temperature, cab outdoor relative humidity, and cab outdoor wind speed.

[0035] An air conditioning information acquisition device is used to acquire air conditioning information, including indoor design temperature, air inlet location, air inlet temperature, air inlet wind speed, air inlet relative humidity, air outlet location, air outlet temperature, air outlet wind speed, and air outlet relative humidity.

[0036] The controller is connected to the cab information acquisition device and the air conditioning information acquisition device respectively. The controller obtains the upper limit value of the temperature inside the cab based on the received cab information and air conditioning information.

[0037] The controller compares the cab temperature in the cab information with the upper temperature limit: if the cab temperature is lower than the upper temperature limit, the controller controls the air conditioner in the cab to enter the heating mode; if the cab temperature is not lower than the upper temperature limit, or if the cab temperature is not lower than the set air conditioner temperature and the air conditioner vents are very hot, the air conditioner exits the heating mode.

[0038] Finally, the present invention also provides an excavator equipped with the aforementioned temperature control system.

[0039] Compared with existing technologies, the cab temperature control system of the present invention is suitable for the air conditioner to enter or exit the heating mode in high-altitude and cold regions. Compared with traditional methods, the present invention obtains the upper limit value of the cab temperature based on cab information and air conditioning information. From the control logic, it can enable the air conditioner to quickly enter the heating mode, increase the cab temperature, and thus meet the user's heating needs in high-altitude and cold regions. In addition, when the air conditioner exits the heating mode, the cab temperature, the air conditioning vent wind speed, and the air conditioning vent heating capacity are used as indicators to obtain the corresponding control function based on big data. Compared with the traditional method that uses heating temperature as an indicator, the control method of the present invention is more intelligent and better meets the needs of human comfort. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the cab information acquisition device of the present invention;

[0042] Figure 2 This is a schematic diagram of the air conditioning information acquisition device of the present invention;

[0043] Figure 3 This is a flowchart of the air conditioner entering heating mode according to the present invention;

[0044] Figure 4 This is a flowchart illustrating the process of an air conditioner exiting heating mode according to the present invention. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0046] Example 1

[0047] like Figures 1-4 As shown, a temperature control system for the cab of an excavator in high-altitude and cold regions includes:

[0048] The cab information acquisition device is used to acquire cab information, including cab volume, cab altitude, cab temperature, cab relative humidity, cab wind speed, cab outdoor ambient temperature, cab outdoor relative humidity, and cab outdoor wind speed.

[0049] An air conditioning information acquisition device is used to acquire air conditioning information, including indoor design temperature, air inlet location, air inlet temperature, air inlet wind speed, air inlet relative humidity, air outlet location, air outlet temperature, air outlet wind speed, and air outlet relative humidity.

[0050] The controller is connected to the cab information acquisition device and the air conditioning information acquisition device respectively. The controller obtains the upper limit value of the temperature inside the cab based on the received cab information and air conditioning information.

[0051] The controller compares the cab temperature in the cab information with the upper temperature limit: if the cab temperature is lower than the upper temperature limit, the controller controls the air conditioner in the cab to enter the heating mode; if the cab temperature is not lower than the upper temperature limit, or if the cab temperature is not lower than the set air conditioner temperature and the air conditioner vents are very hot, the air conditioner exits the heating mode.

[0052] The driver's cab information acquisition device and the air conditioning information acquisition device can both measure relevant information through multiple sensors.

[0053] The present invention also provides an excavator on which the aforementioned temperature control system is installed.

[0054] Example 2

[0055] like Figures 1-4 As shown, a method for controlling the temperature of an excavator cab in high-altitude and cold regions includes the following steps:

[0056] (1) The controller receives cab information transmitted by the cab information acquisition unit and air conditioning information transmitted by the air conditioning information acquisition unit;

[0057] The cab information includes cab volume, cab altitude, cab temperature, cab relative humidity, cab wind speed, cab outdoor ambient temperature, cab outdoor relative humidity, and cab outdoor wind speed.

[0058] The air conditioning information includes the indoor design temperature, air outlet location, air outlet temperature, air inlet temperature, air outlet wind speed, and air outlet relative humidity.

[0059] (2) The controller generates a first function based on the cab information and air conditioning information, and obtains the upper limit value of temperature through the first function;

[0060] The first function uses the cab volume as the first independent variable, the altitude of the cab as the second independent variable, the cab temperature as the third independent variable, the outdoor ambient temperature as the fourth independent variable, the air conditioning indoor design temperature as the fifth independent variable, the air conditioning inlet temperature as the sixth independent variable, the air conditioning outlet temperature as the seventh independent variable, and the upper limit of the cab temperature as the first dependent variable. The first function model F1 is fitted and established as shown in equation (1):

[0061] T max =F1(a,h,T3,T4,T5,T6,T7) (1);

[0062] Where: a is the volume of the cab; h is the altitude of the cab; T3 is the temperature inside the cab; T4 is the ambient temperature outside the cab; T5 is the design temperature of the air conditioning system; T6 is the air conditioning inlet temperature; T7 is the air conditioning outlet temperature; T max This refers to the upper limit of the temperature inside the driver's cab.

[0063] (3) The controller determines whether the temperature inside the cab in the cab information is lower than the upper temperature limit;

[0064] (301) If the temperature is below the upper limit, control the air conditioning in the driver's cab to enter heating mode;

[0065] (302) If the controller determines that the temperature inside the driver’s cab is not lower than the upper limit of the temperature, or the temperature inside the driver’s cab is not lower than the set air conditioning temperature and the heating capacity of the air conditioning outlet is very hot, then the air conditioning will exit the heating mode.

[0066] Among them, ① the controller determines whether the current temperature inside the driver's cab is lower than the air conditioning temperature set by the driver. If it is not lower, then condition one of the air conditioning exiting the heating mode is met.

[0067] ② The controller obtains the current air outlet temperature and the current air inlet temperature based on the air conditioning information, and then obtains the current air inlet and outlet temperature difference. The controller determines whether the current air inlet and outlet temperature difference is lower than 20℃. If it is not lower, then the second condition for the air conditioner to exit the heating mode is met.

[0068] Specifically, the controller obtains the real-time changing temperature difference between the air conditioner's inlet and outlet based on the second function; the second function uses the temperature difference between the air conditioner's inlet and outlet as the second dependent variable to establish a second function model, as shown in equation (2):

[0069] T a =T7-T6 (2);

[0070] In the formula: T a The temperature difference between the air inlet and outlet of the air conditioner;

[0071] ③ The controller determines whether the current air outlet wind speed is lower than the lower limit of the air outlet wind speed. If it is not lower, then the third condition for the air conditioner to exit the heating mode is met.

[0072] Specifically, the controller generates a third function based on the cab information and air conditioning information, and obtains the lower limit value of the air conditioning vent wind speed through the third function;

[0073] The third function uses the cab volume as the first independent variable, the altitude of the cab as the second independent variable, the wind speed inside the cab as the eighth independent variable, the wind speed outside the cab as the ninth independent variable, the wind speed at the air conditioning inlet as the tenth independent variable, the wind speed at the air conditioning outlet as the eleventh independent variable, and the lower limit of the wind speed at the air conditioning outlet as the third dependent variable. The third function model F3 is fitted and established as shown in equation (3):

[0074] v min =F3(a,h,v8,v9,v) 10 ,v 11 (3);

[0075] In the formula: a is the volume of the cab; h is the altitude of the cab; v8 is the wind speed inside the cab; v9 is the wind speed outside the cab; v 10 The airflow velocity at the air conditioner inlet; v 11 The airflow speed at the air conditioner outlet; v min This refers to the lower limit of the airflow velocity at the air conditioner outlet.

[0076] ④ The controller calculates the heating capacity of the air conditioner outlet based on the current air conditioner outlet temperature, current air conditioner outlet wind speed, and current air conditioner outlet relative humidity. When the air conditioner outlet heating capacity is very hot, the fourth condition for the air conditioner to exit heating mode is met.

[0077] The controller obtains the current air outlet temperature, current air outlet wind speed, and current air outlet relative humidity based on the air conditioning information, and establishes a calculation function model for the heating capacity of the air outlet, as shown in equation (4):

[0078]

[0079] In the formula: V heat f1 represents the heating capacity of the air conditioner outlet; f2 represents the relative humidity of the air conditioner outlet; and, when 70 ≤ V heat When V < 75, the heating capacity is moderate; when V ≤ 75, the heating capacity is moderate. heat When V < 80, the heating capacity is warm; when V ≤ 80, the heating capacity is warm. heat When V < 85, the heating capacity is heat; when V ≤ 85, the heating capacity is heat. heat At that time, the heating capacity is very hot;

[0080] When conditions one, two, three, and four above are met simultaneously, the air conditioner will exit heating mode.

[0081] Example 3

[0082] Tests were conducted on an excavator equipped with this temperature control system in a high-altitude region of Qinghai Province. The altitude h was 2.8 km, the indoor design temperature T5 for the air conditioning heating season was 23℃, and the cab volume a was 2.1 m³. 3 The measured data are fitted to establish the first function model, as shown in equation (1):

[0083]

[0084] Calculations show that the upper limit for the temperature inside the driver's cab is 29℃.

[0085] At the start of the test, the temperature inside the cab was close to the ambient temperature outside, at 10℃. The position of the test machine was adjusted so that the excavator was in a test posture for travel deviation, with its working device not obstructing the cab and the left windshield facing the sun. The plane of the windshield was arranged perpendicular to the plane of the air outlet to maximize airflow. A portable hygrometer and anemometer were used to record the relative humidity and wind speed at the air outlet, with the data acquisition device contacts in close contact with the air outlet. Thermocouples were installed according to the measurement point requirements. After correctly connecting the equipment, the power was turned on, and it was confirmed that the temperature data acquisition device could receive signals. The sampling rate was set to 1Hz.

[0086] Because the temperature inside the driver's cab (10℃) is lower than the upper temperature limit (29℃), the air conditioning inside the driver's cab has switched to heating mode.

[0087] When the heating is balanced, the temperature inside the driver's cab is 27°C, while the driver's set air conditioning temperature is 26°C, which meets the first condition for the air conditioning to exit the heating mode (the controller determines that the current temperature inside the driver's cab is not lower than the air conditioning temperature set by the driver).

[0088] The measured air conditioner outlet temperature was 45℃, and the air conditioner inlet temperature was 20℃ during internal circulation. The measured data were used to establish a second function model, as shown in equation (2):

[0089] T a =T7-T6=45℃-20℃ (2);

[0090] Calculations show that the temperature difference between the air conditioner's inlet and outlet is 25℃, which meets the second condition for the air conditioner to exit heating mode (the controller obtains the current air conditioner outlet temperature and the current air conditioner inlet temperature based on the air conditioner information, and then obtains the current air conditioner inlet and outlet temperature difference, and the controller determines that the current air conditioner inlet and outlet temperature difference is not lower than 20℃).

[0091] The measured air velocity at the air conditioner inlet was 2.4 m / s, and the air velocity at the air conditioner outlet was 8.5 m / s. The measured data were used to establish a third function model, as shown in equation (3):

[0092]

[0093] Calculations show that the lower limit of the air outlet wind speed is 4.8 m / s, which meets the third condition for the air conditioner to exit heating mode (the controller determines that the current air outlet wind speed is not lower than the lower limit of the air outlet wind speed).

[0094] The measured relative humidity at the air conditioning outlet was 59%, the temperature inside the driver's cab was 27℃, and the air velocity at the air conditioning outlet was 8.5 m / s. Substituting the measured data into the fourth function model, as shown in equation (4):

[0095]

[0096] Calculations show that the heating capacity V of the air conditioner outlet is... heat The value is 112.25, which is very hot, meeting the fourth condition for the air conditioner to exit heating mode (the controller calculates the heating capacity of the air conditioner outlet based on the current air conditioner outlet temperature, current air conditioner outlet wind speed, and current air conditioner outlet relative humidity, and the heating capacity of the air conditioner outlet is very hot).

[0097] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

Claims

1. A method for controlling the temperature of an excavator cab in high-altitude and cold regions, characterized in that, Includes the following steps: S1. The controller receives cab information transmitted by the cab information acquisition device and air conditioning information transmitted by the air conditioning information acquisition device, and obtains the upper limit value of the temperature inside the cab. The cab information includes cab volume, cab altitude, cab temperature, cab relative humidity, cab wind speed, cab outdoor ambient temperature, cab outdoor relative humidity, and cab outdoor wind speed. The air conditioning information includes the indoor design temperature, air inlet location, air inlet temperature, air inlet wind speed, air inlet relative humidity, air outlet location, air outlet temperature, air outlet wind speed, and air outlet relative humidity. S2. The controller determines whether the temperature inside the cab is lower than the upper temperature limit in the cab information. If it is lower than the upper temperature limit, the controller controls the air conditioner inside the cab to enter the heating mode. When the controller determines that the temperature inside the driver's cab is not lower than the upper limit of the temperature, or when the temperature inside the driver's cab is not lower than the set air conditioning temperature and the heating capacity of the air conditioning vents is very hot, the air conditioning will exit the heating mode.

2. The method for controlling the temperature of an excavator cab in high-altitude and cold regions according to claim 1, characterized in that, The controller determines whether the current temperature inside the driver's cab is lower than the air conditioning temperature set by the driver. If it is not lower, then condition one for the air conditioning to exit heating mode is met. The controller obtains the current air outlet temperature and the current air inlet temperature based on the air conditioning information, and then obtains the current air inlet and outlet temperature difference. The controller determines whether the current air inlet and outlet temperature difference is lower than 20 °C. If it is not lower, then the second condition for the air conditioner to exit the heating mode is met. The controller determines whether the current air outlet wind speed is lower than the lower limit of the air outlet wind speed. If it is not lower, then the third condition for the air conditioner to exit the heating mode is met. The controller calculates the heating capacity of the air conditioner outlet based on the current air conditioner outlet temperature, current air conditioner outlet wind speed, and current air conditioner outlet relative humidity. When the air conditioner outlet heating capacity is very hot, the fourth condition for the air conditioner to exit heating mode is met. When conditions one, two, three, and four above are met simultaneously, the air conditioner will exit heating mode.

3. The method for controlling the temperature of an excavator cab in high-altitude and cold regions according to claim 1, characterized in that, The controller generates a first function based on cab information and air conditioning information, and obtains the upper temperature limit value through the first function; The first function uses the cab volume as the first independent variable, the altitude of the cab as the second independent variable, the cab temperature as the third independent variable, the outdoor ambient temperature as the fourth independent variable, the air conditioning indoor design temperature as the fifth independent variable, the air conditioning inlet temperature as the sixth independent variable, the air conditioning outlet temperature as the seventh independent variable, and the upper limit of the cab temperature as the first dependent variable, to fit and establish the first function model. As shown in equation (1): （1）； In the formula: The volume of the driver's cab; The altitude of the driver's cab; Temperature inside the driver's cab; The ambient temperature outside the driver's cab; Design temperature for air-conditioned indoor spaces; This refers to the air conditioner's air intake temperature. The temperature at the air conditioner's outlet. This represents the upper limit of the temperature inside the driver's cab.

4. The method for controlling the temperature of an excavator cab in high-altitude and cold regions according to claim 1, characterized in that, The controller obtains the real-time temperature difference between the air conditioner's inlet and outlet based on the second function; The second function uses the temperature difference between the air conditioner's inlet and outlet as the second dependent variable to establish a second function model, as shown in equation (2): （2）； In the formula: The temperature difference between the air inlet and outlet of the air conditioner; The temperature at the air conditioner's outlet. This refers to the air inlet temperature of the air conditioner.

5. The method for controlling the temperature of an excavator cab in high-altitude and cold regions according to claim 1, characterized in that, The controller generates a third function based on the cab information and air conditioning information, and obtains the lower limit value of the air conditioning outlet wind speed through the third function; The third function uses the cab volume as the first independent variable, the altitude of the cab as the second independent variable, the wind speed inside the cab as the eighth independent variable, the wind speed outside the cab as the ninth independent variable, the wind speed at the air conditioning inlet as the tenth independent variable, the wind speed at the air conditioning outlet as the eleventh independent variable, and the lower limit of the air conditioning outlet wind speed as the third dependent variable to fit and establish the third function model. As in equation (3): （3）； In the formula: The volume of the driver's cab; The altitude of the driver's cab; Wind speed inside the driver's cab; Wind speed outside the driver's cab; This refers to the airflow velocity at the air conditioner's air intake. This refers to the airflow speed at the air conditioner's outlet. This is the lower limit of the airflow speed at the air conditioner outlet.

6. The method for controlling the temperature of an excavator cab in high-altitude and cold regions according to claim 1, characterized in that, The controller obtains the current air outlet temperature, air outlet wind speed, and relative humidity based on the air conditioning information, and establishes a calculation function model for the heating capacity of the air outlet, as shown in equation (4): （4）； In the formula: The heating capacity of the air conditioner's air outlet; The relative humidity at the air conditioner outlet; The temperature at the air conditioner's outlet. This refers to the airflow speed at the air conditioner's outlet.

7. A method for controlling the temperature of an excavator cab in high-altitude and cold regions according to claim 6, characterized in that, When 70≤ When the temperature is <75°C, the heating capacity is warm; when 75°C ≤ 75°C, the heating capacity is warm. When the temperature is <80°C, the heating capacity is warm; when 80°C ≤ 80°C, the heating capacity is warm. When <85, the heating capacity is heat; when 85≤ At that time, the heating capacity is very hot.

8. A temperature control system for the cab of an excavator in high-altitude and cold regions, characterized in that, The method for controlling the temperature of the excavator cab in high-altitude and cold regions as described in any one of claims 1-7 includes: The cab information acquisition device is used to acquire cab information, including cab volume, cab altitude, cab temperature, cab relative humidity, cab wind speed, cab outdoor ambient temperature, cab outdoor relative humidity, and cab outdoor wind speed. An air conditioning information acquisition device is used to acquire air conditioning information, including indoor design temperature, air inlet location, air inlet temperature, air inlet wind speed, air inlet relative humidity, air outlet location, air outlet temperature, air outlet wind speed, and air outlet relative humidity. The controller is connected to the cab information acquisition device and the air conditioning information acquisition device respectively. The controller obtains the upper limit value of the temperature inside the cab based on the received cab information and air conditioning information. The controller compares the cab temperature in the cab information with the upper temperature limit: if the cab temperature is lower than the upper temperature limit, the controller controls the air conditioner in the cab to enter the heating mode; if the cab temperature is not lower than the upper temperature limit, or if the cab temperature is not lower than the set air conditioner temperature and the air conditioner vents are very hot, the air conditioner exits the heating mode.

9. An excavator, characterized in that, The excavator is equipped with the temperature control system as described in claim 8.

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