A collaborative control system and method for thermal comfort in the cab of electric engineering machinery

Abstract

The present application discloses a collaborative control system and method for thermal comfort in the cab of an electric engineering machinery, the system comprising: a second expansion kettle storing coolant and connected to the inlet of a second water pump, the outlet of the second water pump being connected in sequence to the inlet of an on-board charger, a motor, a motor controller, and a third solenoid valve; a first outlet of the third solenoid valve being connected to the liquid inlet of an electric drive radiator, and the liquid outlet of the electric drive radiator being connected to the inlet of the second water pump; a first expansion kettle storing coolant and connected to the inlet of the first water pump, the outlet of the first water pump being connected in sequence to a heater and the third port of the first solenoid valve; the first port of the first solenoid valve being connected to the inlet of the second solenoid valve, the first outlet of the second solenoid valve being connected to a heater core and then to the first port of the fourth solenoid valve; the second port of the first solenoid valve being connected to a seat heat exchanger and then to the second port of the fourth solenoid valve; the third port of the fourth solenoid valve being connected to the inlet of the first water pump; the second outlet of the third solenoid valve being connected to the fourth port of the fourth solenoid valve; and the second outlet of the second solenoid valve being connected to the inlet of the second water pump.

Description

Technical Field

[0001] The present application belongs to the technical field of pure electric engineering machinery, and specifically relates to a collaborative control system and method for thermal comfort in the cab of an electric engineering machinery. Background Art

[0002] As the demand for energy distribution in electric construction machinery continues to increase, it becomes particularly important to build a thermal comfort system for electric construction machinery that integrates comfort, safety, energy saving and high efficiency.

[0003] Most existing cab thermal comfort solutions are directly implemented in the form of PTC heaters or heat pump systems. Their heating mode is single, and each circulation loop is relatively independent. There are many components and the thermal utilization rate is low. The waste heat of the motor / electronic control system is not fully utilized. The optimal coordinated control strategy for air conditioning heating, seat heating and motor / electronic control thermal circulation loops is not implemented. The energy consumption is large, which not only increases costs and affects comfort, but also reduces the continuous working time of electric construction machinery. Summary of the Invention

[0004] Purpose: In view of at least one of the above technical problems, the present application provides a collaborative control system and method for thermal comfort in the cab of an electric engineering machinery to achieve reasonable heat distribution, improve energy efficiency, extend the operating time of the entire machine, and ensure driving comfort.

[0005] Technical solution: To solve the above technical problems, the technical solution adopted by this application is:

[0006] In a first aspect, a thermal comfort coordinated control system for an electric engineering machinery cab is provided, comprising a second expansion kettle, a second water pump, an on-board charger, a motor, a motor controller, an electric drive radiator, a first expansion kettle, a first water pump, a heater, a heater core, a seat heat exchanger, a seat heating wire, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, and a whole machine controller; the electric drive radiator is provided with a radiator blower, the heater core is provided with a heater blower, and the seat heat exchanger is provided with a seat blower; the first solenoid valve is provided with a first port, a second port, and a third port; the second solenoid valve is provided with an inlet, a first outlet, and a second outlet; the third solenoid valve is provided with a first outlet, a second outlet, and an inlet; and the fourth solenoid valve is provided with a first port, a second port, a third port, and a fourth port;

[0007] The second expansion kettle stores coolant and is connected to the inlet of the second water pump through a pipeline. The outlet of the second water pump is connected to the liquid inlet of the on-board charger through a pipeline. The liquid outlet of the on-board charger is connected to the liquid inlet of the motor through a pipeline. The liquid outlet of the motor is connected to the liquid inlet of the motor controller through a pipeline. The liquid outlet of the motor controller is connected to the inlet of the third solenoid valve through a pipeline. The first outlet of the third solenoid valve is connected to the liquid inlet of the electric drive radiator through a pipeline. The liquid outlet of the electric drive radiator is connected to the inlet of the second water pump through a pipeline, forming a thermal circulation loop for the motor and the motor controller.

[0008] The first expansion tank stores coolant and is connected to the inlet of the first water pump via a pipeline. The outlet of the first water pump is connected to the liquid inlet of the heater via a pipeline. The liquid outlet of the heater is connected to the third port of the first solenoid valve via a pipeline. The first port of the first solenoid valve is connected to the inlet of the second solenoid valve via a pipeline. The first outlet of the second solenoid valve is connected to the first liquid port of the heater core via a pipeline. The second liquid port of the heater core is connected to the first port of the fourth solenoid valve via a pipeline. The second port of the first solenoid valve is connected to the first liquid port of the seat heat exchanger via a pipeline. The second liquid port of the seat heat exchanger is connected to the second port of the fourth solenoid valve via a pipeline. The third port of the fourth solenoid valve is connected to the inlet of the first water pump via a pipeline.

[0009] The second outlet of the third solenoid valve is connected to the fourth outlet of the fourth solenoid valve through a pipeline; the second outlet of the second solenoid valve is connected to the inlet of the second water pump through a pipeline;

[0010] The whole machine controller is respectively connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the first water pump, the second water pump, the motor controller, the heater, the seat heating wire, the radiator fan, the heater fan, and the seat fan signal.

[0011] In some embodiments, the system further includes a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, and a sixth temperature sensor. The first temperature sensor is arranged at the liquid inlet of the motor, the second temperature sensor is arranged at the liquid outlet of the motor, the third temperature sensor is arranged at the liquid inlet of the electric drive radiator, the fourth temperature sensor is arranged at the liquid outlet of the electric drive radiator, the fifth temperature sensor is arranged at the liquid inlet of the heater, and the sixth temperature sensor is arranged at the liquid outlet of the heater, which are respectively used to detect the coolant temperatures at the liquid inlet of the motor, the liquid outlet of the motor, the liquid inlet of the electric drive radiator, the liquid outlet of the electric drive radiator, the liquid inlet of the heater, and the liquid outlet of the heater.

[0012] In some embodiments, the system further comprises:

[0013] A first flow sensor is provided on the pipeline between the first outlet of the second solenoid valve and the first liquid port of the heater core, for detecting the coolant flow of the heater core, and is connected to the whole machine controller signal;

[0014] The second flow sensor is arranged on the pipeline between the second port of the first solenoid valve and the first liquid port of the seat heat exchanger, is used to detect the coolant flow of the seat heat exchanger, and is connected to the whole machine controller signal.

[0015] In some embodiments, the system further comprises:

[0016] Heat exchanger temperature sensor, used to detect the surface temperature of the seat heat exchanger and connected to the whole machine controller signal;

[0017] The heater core temperature sensor is used to detect the heater core surface temperature and is connected to the whole machine controller signal;

[0018] The temperature monitoring module inside and outside the cab is used to detect the temperature inside and outside the cab and is connected to the signal of the whole machine controller.

[0019] In some embodiments, the system further comprises:

[0020] A thermal comfort mode setting module is used to set the thermal comfort mode and is connected to the whole machine controller signal; wherein the thermal comfort mode includes standard mode, comfort mode, and energy-saving mode;

[0021] The motor status monitoring module is used to monitor the motor status and is connected to the whole machine controller signal.

[0022] In a second aspect, a method for collaboratively controlling thermal comfort in an electric engineering machinery cab is provided. Based on the aforementioned collaborative control system for thermal comfort in an electric engineering machinery cab, the method comprises:

[0023] Determining a thermal comfort mode; wherein the thermal comfort mode includes a standard mode, a comfort mode, and an energy-saving mode;

[0024] When the thermal comfort mode is set to the standard mode, identifying the motor state; wherein the motor state includes a cold state and a hot state;

[0025] When the motor is in a cold state, in response to the driver's heating demand, the air conditioning heating and seat heating modes are turned on;

[0026] Obtain the coolant temperature at the liquid inlet of the heater, and determine the corresponding first water pump target speed value and target flow value, and the target heating power value of the heater according to the coolant temperature and the first relationship table; control the speed and flow of the first water pump according to the determined first water pump target speed value and target flow value, and control the heating power of the heater according to the determined target heating power value, wherein the first relationship table contains the corresponding relationship between the coolant temperature and the first water pump target speed value, target flow value, and target heating power value of the heater, and is obtained through pre-fitting test calibration; as the coolant temperature continues to change, while the seat heating wire maintains an electrically heated state, the coolant passes through the first water pump and is heated by the heater to the third port of the first solenoid valve and then is diverted through the first solenoid valve. One path passes through the first port of the first solenoid valve, passes through the inlet of the second solenoid valve, and the first outlet of the second solenoid valve to flow through the heater core. At this time, the second outlet of the second solenoid valve is closed; the other path passes through the second port of the first solenoid valve to flow through the seat exchange valve The heat exchanger forms a circulation loop. In this state, the first outlet of the third solenoid valve, the second outlet of the third solenoid valve, the inlet of the third solenoid valve and the fourth port of the fourth solenoid valve are all closed, and the first port of the fourth solenoid valve, the second port of the fourth solenoid valve, the third port of the fourth solenoid valve, the first port of the first solenoid valve, the second port of the first solenoid valve and the third port of the first solenoid valve are all opened; at this time, the heater fan and the seat fan are not turned on, and the set temperature in the cab and the surface temperature of the seat heat exchanger are obtained. When the absolute value of the difference between the surface temperature of the seat heat exchanger and the set temperature in the cab does not exceed 3°C, the seat heating wire stops working, and the surface temperature of the heater core and the surface temperature of the seat heat exchanger are obtained. When the difference between the surface temperature of the heater core and the set temperature in the cab is greater than 5°C, the heater fan starts; when the difference between the surface temperature of the seat heat exchanger and the set temperature in the cab is greater than 5°C, the seat fan starts; when the coolant temperature reaches the preset upper limit, the power of the heater is controlled to be reduced to 60% of the heater rated power and maintained.

[0027] When the motor is in the hot engine state, in response to the driver's heating demand, the coolant temperature at the liquid inlet of the electric drive radiator is obtained. If the coolant temperature is not lower than the first preset value, the coolant in the heat circulation loop of the motor and the motor controller passes through the inlet of the third solenoid valve, the second outlet of the third solenoid valve, the fourth port of the fourth solenoid valve, the first port of the fourth solenoid valve, and the second port of the fourth solenoid valve, and flows through the heater core and the seat heat exchanger respectively. The coolant flowing out of the heater core passes through the first outlet of the second solenoid valve and the second outlet of the second solenoid valve and returns to the heat circulation loop of the motor and the motor controller. The coolant flowing out of the seat heat exchanger passes through the second port of the first solenoid valve, the first port of the first solenoid valve, the inlet of the second solenoid valve, and the second outlet of the second solenoid valve and returns to the heat circulation loop of the motor and the motor controller. At this time, the first outlet of the third solenoid valve, the third port of the fourth solenoid valve, and the third port of the first solenoid valve are closed, and the first port of the first solenoid valve, the second port of the first solenoid valve, the inlet of the second solenoid valve, the first outlet of the second solenoid valve, and the second outlet of the second solenoid valve are all opened. At this time, the seat heating wire does not work.

[0028] In some embodiments, the method further comprises:

[0029] When the thermal comfort mode is set to comfort mode, identify the motor status;

[0030] When the motor is in the cold state, in response to the driver's demand for heating, the seat is heated first; at this time, the seat heating wire starts heating, the first water pump starts synchronously, the heater blower and the seat blower do not work, and the coolant passes through the first water pump and is heated by the heater to the third port of the first solenoid valve and then is diverted through the first solenoid valve. One path passes through the first port of the first solenoid valve, passes through the inlet of the second solenoid valve, and the first outlet of the second solenoid valve to flow through the heater core, and the other path passes through the second port of the first solenoid valve to flow through the seat heat exchanger to form a circulation loop. At this time, the second outlet of the second solenoid valve and the fourth port of the fourth solenoid valve are closed, and the coolant circuit is in a self-circulating state; when the coolant temperature at the inlet of the heater and the coolant at the outlet of the heater are When the absolute value of the temperature difference is less than 2°C, and the larger of the coolant temperature at the heater's fluid inlet and the coolant temperature at the heater's fluid outlet is greater than or equal to a preset upper limit, the second port of the first solenoid valve and the first port of the first solenoid valve are controlled to maintain openings of 70% and 30%, respectively, the seat heater wire stops operating, and seat thermal comfort is prioritized. A heater target speed, a seat fan target speed, and a heater target power are determined based on the set cabin temperature and the coolant temperature at the heater's fluid outlet, and the heater fan speed, seat fan speed, and heater power are controlled based on the heater fan target speed, seat fan target speed, and heater target power, respectively.

[0031] When the motor is in the hot engine state, in response to the driver's heating demand, the coolant temperature at the liquid inlet of the electric drive radiator is obtained. When the coolant temperature is not lower than the first preset value, the coolant in the heat circulation loop of the motor and the motor controller passes through the inlet of the third solenoid valve, one way through the first outlet of the third solenoid valve to the electric drive radiator to form a heat circulation loop of the motor and the motor controller; the other way passes through the second outlet of the third solenoid valve, the fourth port of the fourth solenoid valve, the first port of the fourth solenoid valve, and the second port of the fourth solenoid valve, and flows through the heater core and the seat heat exchanger respectively. The coolant flowing out of the heater core passes through the first outlet and the second outlet of the second solenoid valve and returns to the motor and the motor controller. The motor controller heat circulation circuit, the coolant flowing out of the seat heat exchanger passes through the second port of the first solenoid valve, the first port of the first solenoid valve, the inlet of the second solenoid valve, and the second outlet of the second solenoid valve and returns to the motor and the motor controller heat circulation circuit. At this time, the third port of the fourth solenoid valve and the third port of the first solenoid valve are closed, and the first port of the fourth solenoid valve and the second port of the fourth solenoid valve are kept at 30% and 70% opening respectively. At this time, the seat heating wire does not work. The target speed of the heater fan and the target speed of the seat fan are determined according to the set temperature and coolant temperature in the cab, and the heater fan speed and the seat fan speed are controlled according to the target speed of the heater fan and the target speed of the seat fan, respectively.

[0032] In some embodiments, the method further comprises:

[0033] When the thermal comfort mode is set to energy-saving mode, identify the motor status;

[0034] When the motor is in the cold state, in response to the driver's heating demand, if the energy recovery intensity is set to 30%, the first water pump, heater and seat heating wire are not turned on by default, and the radiator fan, heater fan and seat fan do not work at the beginning. At this time, the motor controller receives the instruction from the whole machine controller, and intermittently simulates the load condition of the motor state every 30 seconds, so that heat is generated inside the motor, and the coolant passing through is heated to obtain the coolant temperature at the liquid outlet of the motor. When the coolant temperature at the liquid outlet of the motor is not less than the first preset value, the first outlet of the third solenoid valve is closed, and the third outlet of the third solenoid valve is closed. The inlet of the third solenoid valve and the second outlet of the third solenoid valve are opened, the first port of the fourth solenoid valve, the second port of the fourth solenoid valve and the fourth port of the fourth solenoid valve are opened, and the third port of the fourth solenoid valve is closed. The corresponding radiator fan target speed, heater fan target speed, seat fan target speed and seat heater wire target power are determined according to the coolant temperature, and the radiator fan speed, heater fan target speed, seat fan speed and seat heater wire target power are controlled according to the radiator fan target speed, heater fan target speed, seat fan target speed and seat heater wire target power, respectively, and synchronous operation is started to implement heating;

[0035] When the motor is in a cold state and the driver requests heating, if the energy recovery intensity is set to 60%, the first water pump, heater, and seat heaters are all disabled by default. The radiator fan, heater fan, and seat fan are initially disabled. The motor controller receives instructions from the system controller and continuously simulates a loaded operating condition for the motor. When the motor circuit reaches a second preset value, where the second preset value is greater than the first preset value and less than a preset upper limit, the inlet of the third solenoid valve, the first outlet of the third solenoid valve, and the second outlet of the third solenoid valve are opened, the first port of the fourth solenoid valve, the second port of the fourth solenoid valve, and the fourth port of the fourth solenoid valve are opened, and the third port of the fourth solenoid valve is closed. The seat heaters are disabled, and coolant flow rates of the heater core and the seat heat exchanger are obtained. A target heater fan speed is determined based on the heater core coolant flow rate, and a target seat fan speed is determined based on the seat heat exchanger coolant flow rate. The heater fan speed and the seat fan speed are controlled based on the target heater fan speed and the seat fan speed, respectively, to provide heating.

[0036] In a third aspect, a thermal comfort collaborative control system for an electric engineering machinery cab is provided, wherein the whole machine controller includes a processor and a storage medium;

[0037] The storage medium is used to store instructions;

[0038] The processor is configured to operate according to the instructions to execute the method.

[0039] In a fourth aspect, an electric engineering machine is provided, which is equipped with the electric engineering machine cab thermal comfort collaborative control system.

[0040] Compared with the prior art, the present application has the following beneficial effects: (1) In the present application, four solenoid valves are set to coordinately control the air conditioning heating, seat heating, and the heat circulation loop of the motor and motor controller; (2) The present invention divides different thermal comfort modes into standard mode, comfort mode, and energy-saving mode based on different working scenarios and the subjective needs of the driver through the real-time data of human-computer interaction combined with the monitoring of the external environment; the whole machine controller identifies different modes and monitors the initial state parameters of the whole machine, and at the same time uses the temperature stability characteristics and the overall optimal energy consumption as indicators to retrieve the pre-fitted optimal water pump speed, fan speed, heater power and motor load condition to select comfort or energy saving as the orientation to meet the humanized heating needs, which can effectively improve the energy efficiency ratio and ensure driving comfort; (3) The heat circulation loop of the motor and motor controller can be timely introduced into the cab heating circuit by monitoring the status of the cold and hot machines, and can realize the priority of seat and air conditioning heating by controlling the opening of the solenoid valve, thereby realizing the recovery and reuse of motor waste heat and the reasonable distribution of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] Figure 1 This is a schematic diagram of a thermal comfort collaborative control system for an electric engineering machinery cab according to an embodiment of the present application;

[0043] Figure 2 This is a schematic diagram of the thermal comfort setting of the monitoring instrument in an embodiment of the present application;

[0044] Figure 3 This is a logic diagram of the coordinated control of thermal comfort in the cab of an electric engineering machinery according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only some embodiments of the present application, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application, its application, or use.

[0046] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are used only to explain the relative positional relationships and movement of components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. These terms are used solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application.

[0047] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0049] Example 1: Figures 1 to 3 As shown, the present application provides a thermal comfort coordinated control system for an electric engineering machinery cab, including a whole machine controller, the whole machine controller including a processor and a storage medium; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the following electric engineering machinery cab thermal comfort coordinated control method;

[0050] like Figure 1 As shown, the electric engineering machinery cab thermal comfort collaborative control system also includes a second expansion kettle, a second water pump, an on-board charger OBC, a motor, a motor controller, an electric drive radiator, a first expansion kettle, a first water pump, a heater, a heater core, a seat heat exchanger, a seat heating wire, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve and a whole machine controller. The electric drive radiator is provided with a radiator fan F1, the heater core is provided with a heater fan F2, and the seat heat exchanger is provided with a seat fan F3; the first solenoid valve is provided with a first port c1, a second port c2 and a third port c3, the second solenoid valve is provided with an inlet d1, a first outlet d2 and a second outlet d3; the third solenoid valve is provided with a first outlet a1, a second outlet a2 and an inlet a3; the fourth solenoid valve is provided with a first port b1, a second port b2, a third port b3 and a fourth port b4;

[0051] The second expansion kettle stores coolant and is connected to the inlet of the second water pump through a pipeline. The outlet of the second water pump is connected to the liquid inlet of the on-board charger OBC through a pipeline. The liquid outlet of the on-board charger OBC is connected to the liquid inlet of the motor through a pipeline. The liquid outlet of the motor is connected to the liquid inlet of the motor controller through a pipeline. The liquid outlet of the motor controller is connected to the inlet a3 of the third solenoid valve through a pipeline. The first outlet a1 of the third solenoid valve is connected to the liquid inlet of the electric drive radiator through a pipeline. The liquid outlet of the electric drive radiator is connected to the inlet of the second water pump through a pipeline, forming a heat circulation loop for the motor and the motor controller.

[0052] The first expansion tank stores coolant and is connected to the inlet of the first water pump via a pipeline. The outlet of the first water pump is connected to the liquid inlet of the heater via a pipeline. The liquid outlet of the heater is connected to the third port c3 of the first solenoid valve via a pipeline. The first port c1 of the first solenoid valve is connected to the inlet d1 of the second solenoid valve via a pipeline. The first outlet d2 of the second solenoid valve is connected to the first liquid port of the heater core via a pipeline. The second liquid port of the heater core is connected to the first port b1 of the fourth solenoid valve via a pipeline. The second port c2 of the first solenoid valve is connected to the first liquid port of the seat heat exchanger via a pipeline. The second liquid port of the seat heat exchanger is connected to the second port b2 of the fourth solenoid valve via a pipeline. The third port b3 of the fourth solenoid valve is connected to the inlet of the first water pump via a pipeline.

[0053] The second outlet a2 of the third solenoid valve is connected to the fourth port b4 of the fourth solenoid valve through a pipeline; the second outlet d3 of the second solenoid valve is connected to the inlet of the second water pump through a pipeline;

[0054] The whole machine controller is respectively connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the first water pump, the second water pump, the motor controller, the heater, the seat heating wire, the radiator fan F1, the heater fan F2, and the seat fan F3.

[0055] In some embodiments, as Figure 1 As shown, the system also includes a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, and a sixth temperature sensor. The first temperature sensor is arranged at the liquid inlet of the motor, the second temperature sensor is arranged at the liquid outlet of the motor, the third temperature sensor is arranged at the liquid inlet of the electric drive radiator, the fourth temperature sensor is arranged at the liquid outlet of the electric drive radiator, the fifth temperature sensor is arranged at the liquid inlet of the heater, and the sixth temperature sensor is arranged at the liquid outlet of the heater, which are respectively used to detect the coolant temperature T1 at the liquid inlet of the motor, the coolant temperature T2 at the liquid outlet of the motor, the coolant temperature T3 at the liquid inlet of the electric drive radiator, the coolant temperature T4 at the liquid outlet of the electric drive radiator, the coolant temperature T5 at the liquid inlet of the heater, and the coolant temperature T6 at the liquid outlet of the heater.

[0056] In some embodiments, as Figure 1 As shown, the system also includes a first flow sensor L1, which is arranged on the pipeline between the first outlet d2 of the second solenoid valve and the first liquid port of the heater core, and is used to detect the coolant flow of the heater core and is connected to the whole machine controller signal; it also includes a second flow sensor L2, which is arranged on the pipeline between the second port c2 of the first solenoid valve and the first liquid port of the seat heat exchanger, and is used to detect the coolant flow of the seat heat exchanger and is connected to the whole machine controller signal.

[0057] In some embodiments, the system further comprises:

[0058] The heat exchanger temperature sensor is used to detect the seat heat exchanger surface temperature Th and is connected to the whole machine controller signal.

[0059] The heater core temperature sensor is used to detect the surface temperature of the heater core and is connected to the signal of the whole machine controller.

[0060] In some embodiments, the system further includes a cab interior and exterior temperature monitoring module for detecting the cab interior and exterior temperature, and is connected to the whole machine controller signal.

[0061] In some embodiments, the system further includes a thermal comfort mode setting module for setting the thermal comfort mode and connected to the whole machine controller signal; wherein the thermal comfort mode includes a standard mode, a comfort mode, and an energy-saving mode.

[0062] In some embodiments, the system further includes a motor status monitoring module for monitoring the motor status and connected to the whole machine controller signal, wherein the motor status includes a cold state and a hot state.

[0063] In this embodiment, the coolant temperature T2 at the liquid outlet of the motor detected by the second temperature sensor is obtained to determine whether the motor is in a cold state or a hot state.

[0064] Furthermore, if the coolant temperature at the liquid outlet of the motor exceeds the state setting value, it is in the hot engine state; otherwise, it is in the cold engine state.

[0065] The cab interior heating solution primarily combines air conditioning and seat heating to form a thermal comfort system. The heat source required for air conditioning heating can be provided in two ways: first, a heater heats the coolant, which is then introduced into the cab's heating core, where it is then blown out by a blower to achieve the desired heating effect. Second, once the electric drive system's coolant reaches a preset temperature, a solenoid valve switches direction to achieve heat exchange within the cab, thereby achieving the desired heating effect. Seat heating can be achieved through a combination of electric heating and a seat heat exchanger to achieve temperature control.

[0066] When the driver has heating needs, he can manually define the thermal comfort mode through the instrument air conditioning setting interface: standard mode, comfort mode, energy-saving mode; the standard mode is the default mode when the machine is turned on; the comfort mode can be set to According to the driver's subjective need Set to seat priority heating or air conditioning priority heating; energy-saving mode can be set to 30% or 60% according to the intensity of energy recovery.

[0067] Example 2: Figure 2As shown, the present application also provides a method for collaboratively controlling thermal comfort in an electric engineering machinery cab, based on the collaborative control system for thermal comfort in an electric engineering machinery cab described in Example 1, the method comprising:

[0068] Determining a thermal comfort mode; wherein the thermal comfort mode includes a standard mode, a comfort mode, and an energy-saving mode;

[0069] (A) When the thermal comfort mode is set to the standard mode, identifying the motor state; wherein the motor state includes a cold state and a hot state;

[0070] (A1) When the motor is in a cold state, in response to the driver's heating demand, the air conditioning heating and seat heating modes are turned on; the coolant temperature T5 at the liquid inlet of the heater is obtained to monitor the coolant temperature T, and the corresponding first water pump target speed value and target flow value, and the target heating power value of the heater are determined according to the coolant temperature T and the first relationship table; the speed and flow of the first water pump are controlled according to the determined first water pump target speed value and target flow value, and the heating power of the heater is controlled according to the determined target heating power value, wherein the first relationship table contains the relationship between the coolant temperature T and the first water pump target speed value N, target flow value, and target heating power value. The corresponding relationship between the value L and the target heating power value P of the heater is obtained through pre-fitting test calibration; as the coolant temperature changes continuously, while the seat heating wire maintains the electric heating state, the coolant passes through the first water pump and is heated by the heater to the third port c3 of the first solenoid valve and then is diverted through the first solenoid valve. One path passes through the first port c1 of the first solenoid valve, through the inlet d1 of the second solenoid valve, and the first outlet d2 of the second solenoid valve to flow through the heater core. At this time, the second outlet d3 of the second solenoid valve is closed; the other path passes through the second port c2 of the first solenoid valve and flows through the seat heat exchanger to form a circulation loop. In this state, the first outlet d2 of the third solenoid valve is closed. The port a1, the second outlet a2 of the third solenoid valve, the inlet a3 of the third solenoid valve and the fourth port b4 of the fourth solenoid valve are all closed, the first port b1 of the fourth solenoid valve, the second port b2 of the fourth solenoid valve, the third port b3 of the fourth solenoid valve, the first port c1 of the first solenoid valve, the second port c2 of the first solenoid valve and the third port c3 of the first solenoid valve are all opened; at this time, the heater fan F2 and the seat fan F3 are not turned on, and the set temperature Tmin in the cab and the surface temperature Th of the seat heat exchanger are obtained. When the absolute value of the difference between the surface temperature of the seat heat exchanger and the set temperature in the cab does not exceed 3°C (|Th-Tmin|≤3°C), the seat The seat heating wire stops working, and the heater fan F2 and the seat fan F3 start to intervene according to the surface temperature of the heater core and the seat heat exchanger (in some embodiments, specifically: obtain the surface temperature of the heater core and the surface temperature of the seat heat exchanger, when the difference between the surface temperature of the heater core and the set temperature Tmin in the cab is greater than 5°C, the heater fan F2 starts; when the difference between the surface temperature of the seat heat exchanger and the set temperature Tmin in the cab is greater than 5°C, the seat fan F3 starts;), when the coolant temperature T reaches the preset upper limit value Tmax (75~85°C), the power of the heater is controlled to drop to 60% of the heater rated power and maintain it.

[0071] (A2) When the motor is in the hot state, in response to the driver's heating demand, the coolant temperature T3 at the liquid inlet of the electric drive radiator of the motor and motor controller heat circulation loop is monitored by the third temperature sensor. If the coolant temperature is not lower than the first preset value Tdi (in some embodiments, the first preset value is 40-50°C), the coolant in the motor and motor controller heat circulation loop passes through the inlet a3 of the third solenoid valve, the second outlet a2 of the third solenoid valve, the fourth port b4 of the fourth solenoid valve, the first port b1 of the fourth solenoid valve, and the second port b2 of the fourth solenoid valve, and flows through the heater core and the seat heat exchanger respectively. The coolant flowing out of the heater core passes through the inlet a3 of the second solenoid valve, the second outlet a2 of the third solenoid valve, the fourth port b4 of the fourth solenoid valve, the first port b1 of the fourth solenoid valve, and the second port b2 of the fourth solenoid valve. The first outlet d2 and the second outlet d3 of the second solenoid valve return to the thermal circulation circuit of the motor and the motor controller. The coolant flowing out of the seat heat exchanger passes through the second port c2 of the first solenoid valve, the first port c1 of the first solenoid valve, the inlet d1 of the second solenoid valve, and the second outlet d3 of the second solenoid valve and returns to the thermal circulation circuit of the motor and the motor controller. At this time, the first outlet a1 of the third solenoid valve, the third port b3 of the fourth solenoid valve, and the third port c3 of the first solenoid valve are closed, and the first port c1 of the first solenoid valve, the second port c2 of the first solenoid valve, the inlet d1 of the second solenoid valve, the first outlet d2 of the second solenoid valve, and the second outlet d3 of the second solenoid valve are all open. At this time, the seat heating wire does not work.

[0072] (B) When the thermal comfort mode is set to comfort mode, identify the motor status;

[0073] (B1), when the motor state is in the cold state, in response to the driver's heating demand, the seat is heated first; at this time, the seat heating wire is turned on for heating, the first water pump is turned on synchronously, the heater fan F2 and the seat fan F3 are not working, the coolant is heated by the heater through the first water pump and reaches the third port c3 of the first solenoid valve and then is diverted through the first solenoid valve, one way passes through the first port c1 of the first solenoid valve, passes through the inlet d1 of the second solenoid valve, the first outlet d2 of the second solenoid valve and flows through the heater core, and the other way passes through the second port c2 of the first solenoid valve and flows through the seat heat exchanger to form a circulation loop. At this time, the second outlet d3 of the second solenoid valve and the fourth port b4 of the fourth solenoid valve are closed, and the coolant circuit is in a self-circulation state, and no heat is exchanged with the interior of the cab through the heater core and the seat heat exchanger; when the coolant temperature T5, T6 at the inlet of the heater monitored by the fifth temperature sensor and the sixth temperature sensor are When the absolute value of the difference between the coolant temperatures T6 at the heater's liquid outlet is less than 2°C, and the larger of the coolant temperatures T5 at the heater's liquid inlet and T6 at the heater's liquid outlet is greater than or equal to a preset upper limit Tmax, the second port c2 of the first solenoid valve and the first port c1 of the first solenoid valve are controlled to maintain openings of 70% and 30%, respectively, and the seat heater wire stops operating. Since the seat is in direct contact with the human body, seat thermal comfort is prioritized. The target speed of the heater fan F2, the target speed of the seat fan F3, and the target heater power of the heater are determined based on the set cabin temperature Tmin and the coolant temperature T6 at the heater's liquid outlet, and the speed of the heater fan F2, the speed of the seat fan F3, and the target heater power of the heater are controlled based on the target speed of the heater fan F2, the target speed of the seat fan F3, and the target heater power of the heater;

[0074] (B2) When the motor is in the hot state, in response to the driver's heating demand, the coolant temperature T3 at the liquid inlet of the electric drive radiator is monitored by the third temperature sensor. When the coolant temperature is not lower than the first preset value Tdi (40~50℃), the coolant in the heat circulation loop of the motor and motor controller passes through the inlet a3 of the third solenoid valve, one way through the first outlet a1 of the third solenoid valve to the electric drive radiator to form a heat circulation loop of the motor and motor controller; the other way passes through the second outlet a2 of the third solenoid valve, the fourth port b4 of the fourth solenoid valve, the first port b1 of the fourth solenoid valve, and the second port b2 of the fourth solenoid valve, and flows through the heater core and the seat heat exchanger respectively. The coolant flowing out of the heater core passes through the first outlet d2 and the second outlet d3 of the second solenoid valve. Returning to the thermal circulation loop of the motor and motor controller, the coolant flowing out of the seat heat exchanger passes through the second port c2 of the first solenoid valve, the first port c1 of the first solenoid valve, the inlet d1 of the second solenoid valve, and the second outlet d3 of the second solenoid valve and returns to the thermal circulation loop of the motor and motor controller. At this time, the third port b3 of the fourth solenoid valve and the third port c3 of the first solenoid valve are closed, and the first port b1 of the fourth solenoid valve and the second port b2 of the fourth solenoid valve are kept at 30% and 70% opening respectively. At this time, the seat heating wire does not work. The target speed of the warm air fan F2 and the target speed of the seat fan F3 are determined according to the set temperature Tmin in the cab and the coolant temperature T3, and the speed of the warm air fan F2 and the speed of the seat fan F3 are controlled according to the target speed of the warm air fan F2 and the target speed of the seat fan F3 respectively.

[0075] (C) When the thermal comfort mode is set to energy-saving mode, identify the motor status;

[0076] (C1) When the motor is in the cold state, in response to the driver's heating demand, if the energy recovery intensity is set to 30%, the first water pump, heater and seat heating wire are all turned off by default, and the radiator fan F1, heater fan F2 and seat fan F3 do not work at the beginning. At this time, the motor controller receives the instruction from the whole machine controller and implements intermittent simulation of the load condition every 30 seconds for the motor state, so that heat is generated inside the motor and the passing coolant is heated. The coolant temperature T2 at the liquid outlet of the motor is monitored by the second temperature sensor. When the monitored motor circulation loop coolant temperature is not less than the first preset value Tdi (40~50℃), the first outlet a1 of the third solenoid valve is closed. Close, the inlet a3 of the third solenoid valve and the second outlet a2 of the third solenoid valve are opened, the first port b1 of the fourth solenoid valve, the second port b2 of the fourth solenoid valve, and the fourth port b4 of the fourth solenoid valve are opened, and the third port b3 of the fourth solenoid valve is closed. The corresponding target speeds of the radiator fan F1, the heater fan F2, the seat fan F3, and the target power of the seat heater wires are determined according to the coolant temperature T2. The speeds of the radiator fan F1, the heater fan F2, the seat fan F3, and the target power of the seat heater wires are controlled according to the target speeds of the radiator fan F1, the heater fan F2, the seat fan F3, and the target power of the seat heater wires, and the synchronous operation is started to implement heating;

[0077] (C2) When the motor is in the cold state, in response to the driver's heating demand, if the energy recovery intensity is set to 60%, the first water pump, heater and seat heating wire are all turned off by default, and the radiator fan F1, heater fan F2 and seat fan F3 do not work at the beginning. At this time, the motor controller receives the instruction from the whole machine controller and continuously simulates the load condition of the motor state. When the motor circulation loop reaches the second preset value (60~70℃), where the second preset value is greater than the first preset value and less than the preset upper limit value, the inlet a3 of the third solenoid valve, the first outlet a1 of the third solenoid valve, and the third outlet a3 of the third solenoid valve are turned off. The second outlet a2 of the valve is opened, the first port b1 of the fourth solenoid valve, the second port b2 of the fourth solenoid valve, and the fourth port b4 of the fourth solenoid valve are opened, the third port b3 of the fourth solenoid valve is closed, the seat heating wire does not work, and the first flow sensor L1 and the second flow sensor L2 are used to monitor the coolant flow values ​​of the heater core and the seat heat exchanger. The target speed of the heater fan F2 is determined according to the coolant flow value of the heater core, and the target speed of the seat fan F3 is determined according to the coolant flow value of the seat heat exchanger. The heater fan speed and the seat fan speed are controlled according to the heater fan target speed and the seat fan target speed, respectively, to implement heating.

[0078] like Figure 3Figure 2 shows the thermal comfort control logic for the entire vehicle. The entire vehicle control module first receives initial status information, including the system energy-saving intensity setting, thermal comfort mode setting, flow and temperature parameter acquisition, and motor status. It then monitors the indoor and outdoor temperatures. The entire vehicle controller then performs comprehensive calculations to determine the optimal pump speed, fan speed, heater power, and motor load status. The optimal values ​​retrieved by the controller are derived from fitted values ​​from test calibration data.

[0079] Example 3: Based on Example 1 and Example 2, this embodiment of the present application provides a coordinated control system for thermal comfort in the cab of an electric engineering machinery, wherein the whole machine controller includes a processor and a storage medium;

[0080] The storage medium is used to store instructions;

[0081] The processor is configured to operate according to the instructions to execute the method.

[0082] Example 4: The embodiment of the present application provides an electric engineering machinery equipped with the electric engineering machinery cab thermal comfort collaborative control system.

[0083] In summary, this application combines real-time data of human-computer interaction with monitoring of the external environment, and divides different thermal comfort modes based on different working scenarios and the subjective needs of the driver: standard mode, comfort mode, and energy-saving mode; the whole machine controller identifies different modes and monitors the initial state parameters of the whole machine, and uses temperature stability characteristics and overall optimal energy consumption as indicators to retrieve the corresponding optimal water pump speed, fan speed, heater power and motor load conditions obtained in advance to choose comfort or energy saving as the orientation to meet humanized heating needs. The motor / electronic control heat cycle loop can be introduced into the cab heating circuit in a timely manner by monitoring the cooling and heating machine status of the motor, and can realize the priority of seat and air conditioning heating by controlling the opening of the solenoid valve, thereby realizing reasonable energy distribution, improving energy efficiency, extending the cruising time of the whole machine, and ensuring driving comfort.

[0084] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0085] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0086] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0087] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0088] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, technicians in this industry should understand that the present application will have various changes and improvements without departing from the principles and spirit. These improvements should also be regarded as the scope of protection of the present application and are not limited to the above embodiments.

Claims

1. A thermal comfort cooperative control system for an electric engineering machinery cab, characterized in that: It includes a second expansion kettle, a second water pump, an on-board charger, a motor, a motor controller, an electric drive radiator, a first expansion kettle, a first water pump, a heater, a heater core, a seat heat exchanger, a seat heating wire, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve and a whole machine controller. The electric drive radiator is provided with a radiator fan, the heater core is provided with a heater fan, and the seat heat exchanger is provided with a seat fan; the first solenoid valve is provided with a first port, a second port and a third port, the second solenoid valve is provided with an inlet, a first outlet and a second outlet; the third solenoid valve is provided with a first outlet, a second outlet and an inlet; the fourth solenoid valve is provided with a first port, a second port, a third port and a fourth port; The second expansion kettle stores coolant and is connected to the inlet of the second water pump through a pipeline. The outlet of the second water pump is connected to the liquid inlet of the on-board charger through a pipeline. The liquid outlet of the on-board charger is connected to the liquid inlet of the motor through a pipeline. The liquid outlet of the motor is connected to the liquid inlet of the motor controller through a pipeline. The liquid outlet of the motor controller is connected to the inlet of the third solenoid valve through a pipeline. The first outlet of the third solenoid valve is connected to the liquid inlet of the electric drive radiator through a pipeline. The liquid outlet of the electric drive radiator is connected to the inlet of the second water pump through a pipeline, forming a thermal circulation loop for the motor and the motor controller. The first expansion tank stores coolant and is connected to the inlet of the first water pump via a pipeline. The outlet of the first water pump is connected to the liquid inlet of the heater via a pipeline. The liquid outlet of the heater is connected to the third port of the first solenoid valve via a pipeline. The first port of the first solenoid valve is connected to the inlet of the second solenoid valve via a pipeline. The first outlet of the second solenoid valve is connected to the first liquid port of the heater core via a pipeline. The second liquid port of the heater core is connected to the first port of the fourth solenoid valve via a pipeline. The second port of the first solenoid valve is connected to the first liquid port of the seat heat exchanger via a pipeline. The second liquid port of the seat heat exchanger is connected to the second port of the fourth solenoid valve via a pipeline. The third port of the fourth solenoid valve is connected to the inlet of the first water pump via a pipeline. The second outlet of the third solenoid valve is connected to the fourth outlet of the fourth solenoid valve through a pipeline; the second outlet of the second solenoid valve is connected to the inlet of the second water pump through a pipeline; The whole machine controller is respectively connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the first water pump, the second water pump, the motor controller, the heater, the seat heating wire, the radiator fan, the heater fan, and the seat fan signal.

2. The system according to claim 1, wherein: It also includes a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, and a sixth temperature sensor. The first temperature sensor is arranged at the liquid inlet of the motor, the second temperature sensor is arranged at the liquid outlet of the motor, the third temperature sensor is arranged at the liquid inlet of the electric drive radiator, the fourth temperature sensor is arranged at the liquid outlet of the electric drive radiator, the fifth temperature sensor is arranged at the liquid inlet of the heater, and the sixth temperature sensor is arranged at the liquid outlet of the heater, which are respectively used to detect the coolant temperatures at the liquid inlet of the motor, the liquid outlet of the motor, the liquid inlet of the electric drive radiator, the liquid outlet of the electric drive radiator, the liquid inlet of the heater, and the liquid outlet of the heater.

3. The system according to claim 2, characterized in that Also includes: A first flow sensor is provided on the pipeline between the first outlet of the second solenoid valve and the first liquid port of the heater core, for detecting the coolant flow of the heater core, and is connected to the whole machine controller signal; The second flow sensor is arranged on the pipeline between the second port of the first solenoid valve and the first liquid port of the seat heat exchanger, is used to detect the coolant flow of the seat heat exchanger, and is connected to the whole machine controller signal.

4. The system according to claim 3, characterized in that Also includes: Heat exchanger temperature sensor, used to detect the surface temperature of the seat heat exchanger and connected to the whole machine controller signal; and / or, a heater core temperature sensor, used to detect the heater core surface temperature and connected to the whole machine controller signal; And / or, a temperature monitoring module inside and outside the cab, used to detect the temperature inside and outside the cab, and connected to the whole machine controller signal.

5. The system according to claim 4, characterized in that Also includes: A thermal comfort mode setting module is used to set the thermal comfort mode and is connected to the whole machine controller signal; wherein the thermal comfort mode includes standard mode, comfort mode, and energy-saving mode; And / or, a motor status monitoring module is used to monitor the motor status and is connected to the whole machine controller signal.

6. A method for collaboratively controlling thermal comfort in an electric engineering machinery cab, characterized in that: Based on the electric engineering machinery cab thermal comfort coordinated control system according to claim 5, the method includes: Determining a thermal comfort mode; wherein the thermal comfort mode includes a standard mode, a comfort mode, and an energy-saving mode; When the thermal comfort mode is set to the standard mode, identifying the motor state; wherein the motor state includes a cold state and a hot state; When the motor is in a cold state, in response to the driver's heating demand, the air conditioning heating and seat heating modes are turned on; Obtain the coolant temperature at the liquid inlet of the heater, and determine the corresponding first water pump target speed value and target flow value, and the target heating power value of the heater according to the coolant temperature and the first relationship table; control the speed and flow of the first water pump according to the determined first water pump target speed value and target flow value, and control the heating power of the heater according to the determined target heating power value, wherein the first relationship table contains the corresponding relationship between the coolant temperature and the first water pump target speed value, target flow value, and target heating power value of the heater, and is obtained through pre-fitting test calibration; as the coolant temperature continues to change, while the seat heating wire maintains an electrically heated state, the coolant passes through the first water pump and is heated by the heater to the third port of the first solenoid valve and then is diverted through the first solenoid valve. One path passes through the first port of the first solenoid valve, passes through the inlet of the second solenoid valve, and the first outlet of the second solenoid valve to flow through the heater core. At this time, the second outlet of the second solenoid valve is closed; the other path passes through the second port of the first solenoid valve to flow through the seat exchange valve The heat exchanger forms a circulation loop. In this state, the first outlet of the third solenoid valve, the second outlet of the third solenoid valve, the inlet of the third solenoid valve and the fourth port of the fourth solenoid valve are all closed, and the first port of the fourth solenoid valve, the second port of the fourth solenoid valve, the third port of the fourth solenoid valve, the first port of the first solenoid valve, the second port of the first solenoid valve and the third port of the first solenoid valve are all opened; at this time, the heater fan and the seat fan are not turned on, and the set temperature in the cab and the surface temperature of the seat heat exchanger are obtained. When the absolute value of the difference between the surface temperature of the seat heat exchanger and the set temperature in the cab does not exceed 3°C, the seat heating wire stops working, and the surface temperature of the heater core and the surface temperature of the seat heat exchanger are obtained. When the difference between the surface temperature of the heater core and the set temperature in the cab is greater than 5°C, the heater fan starts; when the difference between the surface temperature of the seat heat exchanger and the set temperature in the cab is greater than 5°C, the seat fan starts; when the coolant temperature reaches the preset upper limit, the power of the heater is controlled to be reduced to 60% of the heater rated power and maintained; When the motor is in the hot engine state, in response to the driver's heating demand, the coolant temperature at the liquid inlet of the electric drive radiator is obtained. If the coolant temperature is not lower than the first preset value, the coolant in the heat circulation loop of the motor and the motor controller passes through the inlet of the third solenoid valve, the second outlet of the third solenoid valve, the fourth port of the fourth solenoid valve, the first port of the fourth solenoid valve, and the second port of the fourth solenoid valve, and flows through the heater core and the seat heat exchanger respectively. The coolant flowing out of the heater core passes through the first outlet of the second solenoid valve and the second outlet of the second solenoid valve and returns to the heat circulation loop of the motor and the motor controller. The coolant flowing out of the seat heat exchanger passes through the second port of the first solenoid valve, the first port of the first solenoid valve, the inlet of the second solenoid valve, and the second outlet of the second solenoid valve and returns to the heat circulation loop of the motor and the motor controller. At this time, the first outlet of the third solenoid valve, the third port of the fourth solenoid valve, and the third port of the first solenoid valve are closed, and the first port of the first solenoid valve, the second port of the first solenoid valve, the inlet of the second solenoid valve, the first outlet of the second solenoid valve, and the second outlet of the second solenoid valve are all opened. At this time, the seat heating wire does not work.

7. The method according to claim 6, characterized in that Also includes: When the thermal comfort mode is set to comfort mode, identify the motor status; When the motor is in the cold state, in response to the driver's demand for heating, the seat is heated first; at this time, the seat heating wire starts heating, the first water pump starts synchronously, the heater blower and the seat blower do not work, and the coolant passes through the first water pump and is heated by the heater to the third port of the first solenoid valve and then is diverted through the first solenoid valve. One path passes through the first port of the first solenoid valve, passes through the inlet of the second solenoid valve, and the first outlet of the second solenoid valve to flow through the heater core, and the other path passes through the second port of the first solenoid valve to flow through the seat heat exchanger to form a circulation loop. At this time, the second outlet of the second solenoid valve and the fourth port of the fourth solenoid valve are closed, and the coolant circuit is in a self-circulating state; when the coolant temperature at the inlet of the heater and the coolant at the outlet of the heater are When the absolute value of the temperature difference is less than 2°C, and the larger of the coolant temperature at the heater's fluid inlet and the coolant temperature at the heater's fluid outlet is greater than or equal to a preset upper limit, the second port of the first solenoid valve and the first port of the first solenoid valve are controlled to maintain openings of 70% and 30%, respectively, the seat heater wire stops operating, and seat thermal comfort is prioritized. A heater target speed, a seat fan target speed, and a heater target power are determined based on the set cabin temperature and the coolant temperature at the heater's fluid outlet, and the heater fan speed, seat fan speed, and heater power are controlled based on the heater fan target speed, seat fan target speed, and heater target power, respectively. When the motor is in the hot engine state, in response to the driver's heating demand, the coolant temperature at the liquid inlet of the electric drive radiator is obtained. When the coolant temperature is not lower than the first preset value, the coolant in the heat circulation loop of the motor and the motor controller passes through the inlet of the third solenoid valve, one way through the first outlet of the third solenoid valve to the electric drive radiator to form a heat circulation loop of the motor and the motor controller; the other way passes through the second outlet of the third solenoid valve, the fourth port of the fourth solenoid valve, the first port of the fourth solenoid valve, and the second port of the fourth solenoid valve, and flows through the heater core and the seat heat exchanger respectively. The coolant flowing out of the heater core passes through the first outlet and the second outlet of the second solenoid valve and returns to the motor and the motor controller. The motor controller heat circulation circuit, the coolant flowing out of the seat heat exchanger passes through the second port of the first solenoid valve, the first port of the first solenoid valve, the inlet of the second solenoid valve, and the second outlet of the second solenoid valve and returns to the motor and the motor controller heat circulation circuit. At this time, the third port of the fourth solenoid valve and the third port of the first solenoid valve are closed, and the first port of the fourth solenoid valve and the second port of the fourth solenoid valve are kept at 30% and 70% opening respectively. At this time, the seat heating wire does not work. The target speed of the heater fan and the target speed of the seat fan are determined according to the set temperature and coolant temperature in the cab, and the heater fan speed and the seat fan speed are controlled according to the target speed of the heater fan and the target speed of the seat fan, respectively.

8. The method according to claim 6, characterized in that Also includes: When the thermal comfort mode is set to energy-saving mode, identify the motor status; When the motor is in the cold state, in response to the driver's heating demand, if the energy recovery intensity is set to 30%, the first water pump, heater and seat heating wire are not turned on by default, and the radiator fan, heater fan and seat fan do not work at the beginning. At this time, the motor controller receives the instruction from the whole machine controller, and intermittently simulates the load condition of the motor state every 30 seconds, so that heat is generated inside the motor, and the coolant passing through is heated to obtain the coolant temperature at the liquid outlet of the motor. When the coolant temperature at the liquid outlet of the motor is not less than the first preset value, the first outlet of the third solenoid valve is closed, and the third outlet of the third solenoid valve is closed. The inlet of the third solenoid valve and the second outlet of the third solenoid valve are opened, the first port of the fourth solenoid valve, the second port of the fourth solenoid valve and the fourth port of the fourth solenoid valve are opened, and the third port of the fourth solenoid valve is closed. The corresponding radiator fan target speed, heater fan target speed, seat fan target speed and seat heater wire target power are determined according to the coolant temperature, and the radiator fan speed, heater fan target speed, seat fan speed and seat heater wire target power are controlled according to the radiator fan target speed, heater fan target speed, seat fan target speed and seat heater wire target power, respectively, and synchronous operation is started to implement heating; When the motor is in a cold state and the driver requests heating, if the energy recovery intensity is set to 60%, the first water pump, heater, and seat heaters are all disabled by default. The radiator fan, heater fan, and seat fan are initially disabled. The motor controller receives instructions from the system controller and continuously simulates a loaded operating condition for the motor. When the motor circuit reaches a second preset value, where the second preset value is greater than the first preset value and less than a preset upper limit, the inlet of the third solenoid valve, the first outlet of the third solenoid valve, and the second outlet of the third solenoid valve are opened, the first port of the fourth solenoid valve, the second port of the fourth solenoid valve, and the fourth port of the fourth solenoid valve are opened, and the third port of the fourth solenoid valve is closed. The seat heaters are disabled, and coolant flow rates of the heater core and the seat heat exchanger are obtained. A target heater fan speed is determined based on the heater core coolant flow rate, and a target seat fan speed is determined based on the seat heat exchanger coolant flow rate. The heater fan speed and the seat fan speed are controlled based on the target heater fan speed and the seat fan speed, respectively, to provide heating.

9. The system according to claim 5, characterized in that The whole machine controller includes a processor and a storage medium; The storage medium is used to store instructions; The processor is configured to operate according to the instructions to execute the method according to any one of claims 6 to 8.

10. An electric engineering machine, characterized in that: The electric engineering machinery cab is equipped with a thermal comfort collaborative control system as described in any one of claims 1 to 5 or claim 9.

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