Electric working machine thermal management system and electric working machine

Abstract

The utility model relates to the technical field of thermal management of operation machinery, and discloses a thermal management system of electric operation machinery and the electric operation machinery. The electric working machine comprises a motor electric control cooling system, a motor electric control cooling system and a motor electric control cooling system, the hydraulic oil cooling system comprises a hydraulic oil radiator, and the hydraulic oil radiator and the cooling liquid radiator are arranged in parallel; the cooling fan is arranged towards the adjacent area of the hydraulic oil radiator and the cooling liquid radiator; the air conditioning system comprises a compressor; the motor is in transmission connection with the cooling fan and the compressor. According to the utility model, the motor in transmission connection with the cooling fan is in transmission connection with the compressor in the air-conditioning system, so that the integration of a motor electric control cooling system, a hydraulic oil cooling system and the air-conditioning system is realized, the number of parts in the thermal management system of the electric operation machine is reduced, and the manufacturing cost of the thermal management system of the electric operation machine is reduced; and the reliability and the integration degree of the thermal management system of the electric operation machinery are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal management of operating machinery, in particular to a thermal management system for electric operating machinery and an electric operating machinery. Background Art

[0002] Under the general background of "reducing emissions and carbon emissions", electric drive operation meets current expectations for the development of operating machinery. It can not only effectively reduce carbon emissions, but also save resources.

[0003] However, due to the low integration between the motor electronic control cooling system, hydraulic oil cooling system and air conditioning system in the current electric working machinery, the preparation cost and layout difficulty of the thermal management system of the electric working machinery will increase. Utility Model Content

[0004] In view of this, the utility model provides a thermal management system for an electric working machine, and an electric working machine using the thermal management system, so as to solve the problem of low integration of the thermal management system of the electric working machine in the related art.

[0005] In a first aspect, the utility model provides a thermal management system for an electric working machine (hereinafter referred to as a "thermal management system" for the convenience of description), comprising:

[0006] The motor electronically controlled cooling system includes a coolant radiator;

[0007] A hydraulic oil cooling system, comprising a hydraulic oil radiator, wherein the hydraulic oil radiator and the coolant radiator are arranged in parallel;

[0008] A cooling fan is arranged toward the adjacent areas of the hydraulic oil radiator and the coolant radiator;

[0009] Hydraulic oil cooling system, including compressor;

[0010] The electric motor is respectively connected to the cooling fan and the compressor in a driving manner.

[0011] Beneficial effect: The hydraulic oil cooling system radiator (HOC) and the coolant radiator (RAD) are arranged in parallel, and the cooling fan is arranged toward the adjacent area of ​​the hydraulic oil radiator and the coolant radiator, so that the cooling fan can dissipate heat for the hydraulic oil radiator while also physically dissipating heat for the coolant radiator, that is, it can be achieved that one cooling fan can simultaneously dissipate heat and cool down the two radiators in the thermal management system, so that the structure of the thermal management system can be simplified, and the production cost and layout difficulty of the thermal management system can be reduced. In addition, the motor is connected to the cooling fan and the compressor (COM) at the same time, which can realize the integration of the motor electronic control cooling system, the hydraulic oil cooling system and the air conditioning system, that is, the cooling fan and the compressor can be used by one motor to simultaneously meet the respective needs of the motor electronic control cooling system, the hydraulic oil cooling system and the air conditioning system. In addition, since the cooling fan and the compressor share one motor, the structure of the thermal management system can be simplified, the number of components in the thermal management system can be reduced, and the reliability and economy of the thermal management system can be improved.

[0012] In an optional embodiment, the electric working machinery thermal management system also includes a first temperature sensor, a second temperature sensor and a pressure sensor respectively electrically connected to the electronic control module of the motor electronic control cooling system; the first temperature sensor is connected to the coolant pipeline in the motor electronic control cooling system, and is used to detect the coolant temperature in the coolant pipeline; the second temperature sensor is connected to the hydraulic oil pipeline in the hydraulic oil cooling system, and is used to detect the hydraulic oil temperature in the hydraulic oil pipeline; the pressure sensor is connected to the refrigerant pipeline in the air-conditioning system, and is used to detect the pipeline pressure in the refrigerant pipeline.

[0013] Beneficial effect: By arranging a first temperature sensor on the coolant pipeline, a second temperature sensor on the hydraulic oil pipeline, and a pressure sensor on the refrigerant pipeline, and electrically connecting the first temperature sensor, the second temperature sensor and the pressure sensor to the electronic control module respectively, real-time monitoring of physical parameters such as temperature and pressure of the coolant pipeline, the hydraulic oil pipeline and the refrigerant pipeline can be achieved.

[0014] In an optional embodiment, the motor is electrically connected to the electronic control module. When the air-conditioning system is in cooling mode, the electronic control module controls the motor to rotate at the maximum speed according to the maximum speed of the motor corresponding to the coolant temperature, the hydraulic oil temperature and the pipeline pressure.

[0015] Beneficial effect: By electrically connecting the motor to the electronic control module, the automatic control of the thermal management system can be realized, that is, based on the coolant temperature, hydraulic oil temperature and pipeline pressure information obtained by the electronic control module in real time, the electronic control module will flexibly adjust the speed of the motor to ensure that the thermal management system always works within the preset normal range. Furthermore, when the air-conditioning system is in cooling mode, the motor rotates at the maximum speed of the motor corresponding to the coolant temperature, hydraulic oil temperature and pipeline pressure, which can make the motor electronic control cooling system, hydraulic oil cooling system and air-conditioning system work normally under their own reasonable working conditions, avoiding the phenomenon of excessive coolant temperature, excessive hydraulic oil temperature or insufficient pipeline pressure.

[0016] In an optional implementation, the number of the pressure sensors is at least two, one of which is a low-pressure sensor and the other is a high-pressure sensor.

[0017] Beneficial effect: By setting a low-pressure sensor and a high-pressure sensor on the refrigerant pipeline of the air-conditioning system, the pressure of the refrigerant before and after entering the compressor can be obtained, so as to monitor the operation of the air-conditioning system.

[0018] In an optional embodiment, the electric motor is electrically connected to the electronic control module. When the air-conditioning system is in a shutdown mode, the electronic control module controls the motor to rotate at the maximum speed based on the maximum speed of the motor corresponding to the coolant temperature and the hydraulic oil temperature.

[0019] Beneficial effect: By electrically connecting the motor to the electronic control module, the automatic control of the thermal management system can be realized, that is, based on the coolant temperature and hydraulic oil temperature information obtained in real time by the electronic control module, the electronic control module will flexibly adjust the speed of the motor to ensure that the thermal management system always works within the preset normal range. Furthermore, when the air-conditioning system is in shutdown mode, the motor rotates at the maximum speed of the motor corresponding to the coolant temperature and the hydraulic oil temperature, which can make the motor electronic control cooling system and the hydraulic oil cooling system work normally under their own reasonable working conditions, avoiding the phenomenon of excessive coolant temperature or excessive hydraulic oil temperature.

[0020] In an optional embodiment, the motor electronic control cooling system also includes an electronic water pump, an electronic control module and a main pump motor, the coolant radiator has a water outlet and a water inlet, and the electronic water pump, the electronic control module and the main pump motor all have channels for the flow of coolant; the water outlet is connected to the channel of the electronic water pump, the channel of the electronic control module, the channel of the main pump motor and the water inlet in sequence through a coolant pipeline to form a circulation loop.

[0021] Beneficial effect: Since the power of the main pump motor is usually higher than that of the electronic control module (CON), the heat generated by the main pump motor will be higher than the power of the electronic control module in the same period of time, that is, the temperature rise rate of the main pump motor is faster than that of the electronic control module in the same period of time. Therefore, by allowing the coolant in the coolant pipeline to pass through the electronic control module before passing through the main pump motor, the thermal shock generated by the main pump motor on the electronic control module can be reduced, ensuring that the main pump motor and the electronic control module always operate within the normal operating temperature range, avoiding the degradation of their own performance due to poor cooling effect.

[0022] In an optional implementation, the heat dissipation fan is a mechanical fan.

[0023] Beneficial effect: Since the mechanical fan has no protective casing, it can effectively avoid the dynamic balance failure problem caused by dust accumulation compared to the electronic fan, ensuring that the cooling fan can always quickly take away the heat around the coolant radiator and the hydraulic oil radiator, ensuring the normal operation of the thermal management system.

[0024] In an optional embodiment, the air conditioning system further includes a condenser, which is arranged opposite to the cooling fan and located on a side of the hydraulic oil radiator and the coolant radiator away from the cooling fan, and the cooling fan is a negative pressure fan.

[0025] Beneficial effect: The condenser and the cooling fan are arranged on opposite sides of the hydraulic oil radiator and the coolant radiator, which not only allows the cooling fan to dissipate heat for the hydraulic oil radiator and the coolant radiator, but also allows the cooling fan to drive the airflow around the condenser to accelerate the cooling speed of the condenser. Furthermore, the cooling fan is set as a negative pressure fan, which allows the hot airflow around the hydraulic oil radiator, the coolant radiator and the condenser to flow toward the direction of the power system compartment of the electric working machine, so as to prevent the hot airflow from flowing to other equipment of the electric working machine and causing the temperature of other equipment to rise.

[0026] In an optional implementation, the motor is a double-shaft motor, one output shaft of the double-shaft motor is coaxially connected to the compressor, and the other output shaft of the double-shaft motor is coaxially connected to the cooling fan.

[0027] Beneficial effects: The utility model sets the motor as a double-shaft motor, which can realize the integration of the motor, compressor and cooling fan, reduce the number of transmission mechanisms and connectors, and reduce manufacturing costs; on the other hand, it can reduce the installation space and make the entire system more compact. In addition, one output shaft of the double-shaft motor is coaxially connected to the compressor, and the other output shaft is coaxially connected to the cooling fan, so that the compressor and the cooling fan can rotate at the same speed, ensuring the reliability of the thermal management system.

[0028] In a second aspect, the utility model further provides an electric working machine, including: the above-mentioned electric working machine thermal management system.

[0029] Beneficial effects: By adopting the above-mentioned electric working thermal management system on electric working machinery, on the one hand, the integration of the thermal management system can be improved; on the other hand, the structure of the thermal management system can be simplified to reduce the difficulty of arranging the thermal management system on the electric working machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 The present invention is a schematic diagram of the connection of a thermal management system for an electric working machine according to an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Motor electronic control cooling system; 101. Coolant radiator; 102. First temperature sensor; 103. Coolant pipeline; 104. Electronic water pump; 105. Electronic control module; 106. Main pump motor; 2. Hydraulic oil cooling system; 201. Hydraulic oil radiator; 3. Cooling fan; 301. Mechanical fan; 4. Air conditioning system; 401. Compressor; 402. Pressure sensor; 4021. Low pressure sensor; 4022. High pressure sensor; 403. Refrigerant pipeline; 404. Condenser; 405. Solenoid expansion valve; 406. Evaporator; 407. Blower; 5. Electric motor. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0035] In view of the problem of low integration of thermal management systems for electric working machinery in related technologies, the utility model provides a thermal management system for electric working machinery, and an electric working machinery using the thermal management system.

[0036] Combine the following Figure 1 , describing an embodiment of the utility model.

[0037] According to the embodiments of the present utility model, Figure 1 As shown, on the one hand, a thermal management system for electric working machinery (hereinafter referred to as "thermal management system" for the convenience of expression) is provided, including: a motor electronic control cooling system 1, a hydraulic oil cooling system 2, a cooling fan 3, an air conditioning system 4 and an electric motor 5.

[0038] Specifically, the motor electronic control cooling system 1 includes a coolant radiator 101; the hydraulic oil cooling system 2 includes a hydraulic oil radiator 201, and the hydraulic oil radiator 201 is arranged in parallel with the coolant radiator 101; the cooling fan 3 is arranged toward the adjacent area of ​​the hydraulic oil radiator 201 and the coolant radiator 101; the air-conditioning system 4 includes a compressor 401; and the electric motor 5 is respectively connected to the cooling fan 3 and the compressor 401.

[0039] In this embodiment, the hydraulic oil radiator 201 and the coolant radiator 101 are arranged in parallel, and the cooling fan 3 is arranged toward the adjacent area of ​​the hydraulic oil radiator 201 and the coolant radiator 101, so that the cooling fan 3 can dissipate heat from the hydraulic oil radiator 201 and the coolant radiator 101 physically, that is, it can be realized that one cooling fan 3 can simultaneously dissipate heat and cool down the two radiators in the thermal management system, so that the structure of the thermal management system can be simplified, and the manufacturing cost and layout difficulty of the thermal management system can be reduced. In addition, the motor 5 is connected to the cooling fan 3 and the compressor 401 at the same time, which can realize the integration of the motor electronic control cooling system 1, the hydraulic oil cooling system 2 and the air conditioning system 4, that is, the cooling fan 3 and the compressor 401 can meet the respective needs of the motor electronic control cooling system 1, the hydraulic oil cooling system 2 and the air conditioning system 4 through one motor 5. In addition, since the cooling fan 3 and the compressor 401 share one motor 5, the structure of the thermal management system can be simplified, the number of components in the thermal management system can be reduced, and the reliability and economy of the thermal management system can be improved.

[0040] It should be noted that this embodiment does not limit the transmission mode between the cooling fan 3 and the motor 5. For example, in some embodiments of the present invention, the output shaft of the motor 5 is connected to the cooling fan 3 through a pulley. Similarly, this embodiment does not limit the transmission mode between the compressor 401 and the motor 5. For example, in some embodiments of the present invention, the output shaft of the motor 5 is connected to the compressor 401 through a coupling.

[0041] According to one embodiment of the utility model, the thermal management system of the electric working machinery also includes a first temperature sensor 102, a second temperature sensor and a pressure sensor 402 which are respectively electrically connected to the electronic control module 105 of the motor electronic control cooling system 1; the first temperature sensor 102 is connected to the coolant pipeline 103 in the motor electronic control cooling system 1, and is used to detect the coolant temperature in the coolant pipeline 103; the second temperature sensor is connected to the hydraulic oil pipeline in the hydraulic oil cooling system 2, and is used to detect the hydraulic oil temperature in the hydraulic oil pipeline; the pressure sensor 402 is connected to the refrigerant pipeline 403 in the air-conditioning system 4, and is used to detect the pipeline pressure in the refrigerant pipeline 403.

[0042] This embodiment can monitor the temperature, pressure and other physical parameters of the coolant pipeline 103, the hydraulic oil pipeline and the refrigerant pipeline 403 in real time by setting a first temperature sensor 102 on the coolant pipeline 103, setting a second temperature sensor on the hydraulic oil pipeline and setting a pressure sensor 402 on the refrigerant pipeline 403, and electrically connecting the first temperature sensor 102, the second temperature sensor and the pressure sensor 402 to the electronic control module 105 respectively. Furthermore, by electrically connecting the motor 5 to the electronic control module 105, the automatic control of the thermal management system can be realized, that is, based on the coolant temperature, hydraulic oil temperature and pipeline pressure information obtained in real time by the electronic control module 105, the electronic control module 105 will flexibly adjust the speed of the motor 5, so as to ensure that the thermal management system always works within the preset normal range. In this way, not only can manual intervention be reduced, but also the occurrence of sudden failures of the thermal management system can be reduced, and the stability and reliability of the thermal management system can be enhanced.

[0043] According to an embodiment of the utility model, the motor 5 is electrically connected to the electronic control module 105. When the air conditioning system 4 is in the cooling mode, the electronic control module 105 controls the motor 5 to rotate at the maximum speed according to the maximum speed of the motor 5 corresponding to the coolant temperature, the hydraulic oil temperature and the pipeline pressure. The motor 5 is electrically connected to the electronic control module 105, which can realize the automatic control of the thermal management system, that is, based on the coolant temperature, the hydraulic oil temperature and the pipeline pressure information obtained by the electronic control module 105 in real time, the electronic control module 105 will flexibly adjust the speed of the motor 5, so as to ensure that the thermal management system always works within the preset normal range. Further, when the air conditioning system 4 is in the cooling mode, the motor 5 rotates at the maximum speed of the motor 5 corresponding to the coolant temperature, the hydraulic oil temperature and the pipeline pressure, which can make the motor electronic control cooling system 1, the hydraulic oil cooling system 2 and the air conditioning system 4 work normally under their own reasonable working conditions, avoiding the phenomenon of excessive coolant temperature, excessive hydraulic oil temperature or insufficient pipeline pressure.

[0044] It should be noted that the air conditioning system 4 in the present invention also has a heating mode.

[0045] According to an embodiment of the utility model, the number of pressure sensors 402 is at least two, one of which is a low-pressure sensor 4021, and the other is a high-pressure sensor 4022. Specifically, the low-pressure sensor 4021 is arranged at the refrigerant inlet of the compressor 401 or on the refrigerant pipeline 403 connected to the refrigerant inlet of the compressor 401; the high-pressure sensor 4022 is arranged at the refrigerant outlet of the compressor 401 or on the refrigerant pipeline 403 connected to the refrigerant outlet of the compressor 401. By arranging a low-pressure sensor 4021 and a high-pressure sensor 4022 on the refrigerant pipeline 403 of the air-conditioning system 4, the pressure before and after the refrigerant enters the compressor can be obtained, so as to monitor the operation of the air-conditioning system 4.

[0046] It is understandable that, since both the low pressure sensor 4021 and the high pressure sensor 4022 are electrically connected to the electronic control module 105, when the pressure in the refrigerant pipeline 403 is lower than or higher than the preset value of the air conditioning system 4, the electronic control module 105 will control the compressor 401 to stop working, prevent the air conditioning system 4 from malfunctioning due to the abnormal pressure of the refrigerant pipeline 403, and achieve the purpose of protecting the air conditioning system 4. Exemplarily, when the pipeline pressure of the refrigerant pipeline 403 is lower than 225kPa or the pipeline pressure of the refrigerant pipeline 403 is higher than 3140kPa, the electronic control module 105 will control the compressor 401 to stop working and enter the system protection state. When the pipeline pressure of the refrigerant pipeline 403 is between 225kPa and 3140kPa, the electronic control module 105 will perform stepless speed regulation on the motor 5 and the cooling fan 3 according to the pipeline pressure, the coolant temperature and the hydraulic oil temperature.

[0047] According to an embodiment of the utility model, the motor 5 is electrically connected to the electronic control module 105. When the air conditioning system 4 is in the shutdown mode, the electronic control module 105 controls the motor 5 to rotate at the maximum speed according to the maximum speed of the motor 5 corresponding to the coolant temperature and the hydraulic oil temperature. The motor 5 is electrically connected to the electronic control module 105, which can realize the automatic control of the thermal management system, that is, based on the coolant temperature and hydraulic oil temperature information obtained by the electronic control module 105 in real time, the electronic control module 105 will flexibly adjust the speed of the motor 5, so as to ensure that the thermal management system always works within the preset normal range. Further, when the air conditioning system 4 is in the shutdown mode, the motor 5 rotates at the maximum speed of the motor 5 corresponding to the coolant temperature and the hydraulic oil temperature, which can make the motor electronic control cooling system 1 and the hydraulic oil cooling system 2 work normally under their own reasonable working conditions, avoiding the phenomenon of excessive coolant temperature or excessive hydraulic oil temperature.

[0048] According to one embodiment of the utility model, the motor electronic control cooling system 1 also includes an electronic water pump 104, an electronic control module 105 and a main pump motor 106, the coolant radiator 101 has a water outlet and a water inlet, and the electronic water pump 104, the electronic control module 105 and the main pump motor 106 all have channels for the flow of coolant; the water outlet is connected to the channel of the electronic water pump 104, the channel of the electronic control module 105, the channel of the main pump motor 106 and the water inlet in sequence through the coolant pipeline 103 to form a circulation loop.

[0049] It should be noted that, since the power of the main pump motor 106 is usually higher than the power of the electronic control module 105, the heat generated by the main pump motor 106 will be higher than the power of the electronic control module 105 in the same period of time, that is, the temperature rise rate of the main pump motor 106 is faster than the temperature rise rate of the electronic control module 105 in the same period of time. Therefore, by allowing the coolant in the coolant pipeline 103 to pass through the electronic control module 105 first and then pass through the main pump motor 106, the thermal shock generated by the main pump motor 106 on the electronic control module 105 can be reduced, ensuring that the main pump motor 106 and the electronic control module 105 always operate within the normal operating temperature range, avoiding the degradation of their own performance due to poor cooling effect.

[0050] It should be noted that the channels arranged inside the electronic water pump 104, the electric control module 105 and the main pump motor 106 have a coolant inlet and a coolant outlet. The water outlet is connected to the coolant inlet of the electronic water pump 104 through the coolant pipeline 103, the coolant outlet of the electronic water pump 104 is connected to the coolant inlet of the electric control module 105 through the coolant pipeline 103, the coolant outlet of the electric control module 105 is connected to the coolant inlet of the main pump motor 106 through the coolant pipeline 103, and the coolant outlet of the main pump motor 106 is connected to the water inlet through the coolant pipeline 103, thereby forming a complete coolant circulation loop.

[0051] According to an embodiment of the utility model, the cooling fan 3 is a mechanical fan 301. Since the mechanical fan 301 has no protective shell, it can effectively avoid the dynamic balance failure problem caused by dust accumulation compared to the electronic fan, ensuring that the cooling fan 3 can always quickly take away the heat around the coolant radiator 101 and the hydraulic oil radiator 201, ensuring the normal operation of the thermal management system.

[0052] It should be noted that dynamic balance failure means that a large amount of dust will accumulate on the blades of the electronic fan during the continuous operation of the electronic fan. Under the influence of the dust, the mass of the blades of the electronic fan will be unevenly distributed, so the blades will interfere with the shell outside the blades, thereby affecting the heat dissipation effect of the electronic fan on the radiator. It is understandable that since the mechanical fan 301 does not have a protective shell, it can not only avoid the situation of dynamic balance failure, but also improve the convenience of subsequent dust cleaning.

[0053] According to an embodiment of the utility model, the air conditioning system 4 further includes a condenser 404, which is arranged opposite to the cooling fan 3 and is located on the side of the hydraulic oil radiator 201 and the coolant radiator 101 away from the cooling fan 3, and the cooling fan 3 is a negative pressure fan. It can be understood that arranging the condenser 404 and the cooling fan 3 on the opposite sides of the hydraulic oil radiator 201 and the coolant radiator 101 can not only allow the cooling fan 3 to dissipate heat for the hydraulic oil radiator 201 and the coolant radiator 101, but also allow the cooling fan 3 to drive the air flow around the condenser 404 to accelerate the cooling speed of the condenser 404. Further, setting the cooling fan 3 as a negative pressure fan can allow the hot air flow around the hydraulic oil radiator 201, the coolant radiator 101 and the condenser 404 to flow in the direction of the power system compartment of the electric working machine, so that the hot air flow can be prevented from flowing to other equipment of the electric working machine and causing the temperature of other equipment to rise.

[0054] It should be noted that the air conditioning system 4 in this embodiment also includes an evaporator 406, a blower 407 and an electromagnetic expansion valve 405. Specifically, the compressor 401 has a refrigerant outlet and a refrigerant inlet, and the refrigerant outlet is connected to the condenser 404, the electromagnetic expansion valve 405, the evaporator 406 (Evaporator, EVP) and the refrigerant inlet in sequence through the refrigerant pipeline 403, and forms a complete refrigerant circulation loop. It is understandable that in order to reduce the number of refrigerant pipelines 403, the electromagnetic expansion valve 405 can be integrated on the evaporator 406.

[0055] In a specific embodiment, the condenser 404 is integrated with a liquid storage dryer for temporarily storing refrigerants such as Freon and hydrofluoroolefins.

[0056] According to an embodiment of the utility model, the motor 5 is a double-shaft motor, one output shaft of the double-shaft motor is coaxially connected to the compressor 401, and the other output shaft of the double-shaft motor is coaxially connected to the cooling fan 3. The utility model sets the motor 5 as a double-shaft motor, which can realize the integration of the motor 5, the compressor 401 and the cooling fan 3, reduce the number of transmission mechanisms and connectors, and reduce manufacturing costs; on the other hand, it can reduce the installation space and make the entire system more compact. In addition, by coaxially connecting one output shaft of the double-shaft motor to the compressor 401 and coaxially connecting the other output shaft to the cooling fan 3, the compressor 401 and the cooling fan 3 can rotate at the same speed, thereby improving the reliability of the thermal management system.

[0057] According to an embodiment of the utility model, on the other hand, an electric working machine is provided, comprising: the above-mentioned electric working machine thermal management system. By adopting the above-mentioned electric working thermal management system on the electric working machine, on the one hand, the integration of the thermal management system can be improved; on the other hand, the structure of the thermal management system can be simplified to reduce the difficulty of arranging the thermal management system on the electric working machine.

[0058] It should be noted that the electric working machine in the present invention may be, but is not limited to, electric working machines such as towed electric excavators, electric cranes, and electric bulldozers.

[0059] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A thermal management system for electric working machinery, characterized in that: include: An electric motor electronically controlled cooling system (1) comprises a coolant radiator (101); A hydraulic oil cooling system (2), comprising a hydraulic oil radiator (201), wherein the hydraulic oil radiator (201) and the coolant radiator (101) are arranged in parallel; A cooling fan (3) is arranged toward the adjacent areas of the hydraulic oil radiator (201) and the coolant radiator (101); An air conditioning system (4), comprising a compressor (401); The electric motor (5) is respectively connected to the cooling fan (3) and the compressor (401) in a transmission manner.

2. The thermal management system for electric working machinery according to claim 1, characterized in that: It also includes a first temperature sensor (102), a second temperature sensor and a pressure sensor (402) which are electrically connected to the electric control module (105) of the motor electronic control cooling system (1) respectively; the first temperature sensor (102) is connected to the coolant pipeline (103) in the motor electronic control cooling system (1) and is used to detect the coolant temperature in the coolant pipeline (103); the second temperature sensor is connected to the hydraulic oil pipeline in the hydraulic oil cooling system (2) and is used to detect the hydraulic oil temperature in the hydraulic oil pipeline; the pressure sensor (402) is connected to the refrigerant pipeline (403) in the air conditioning system (4) and is used to detect the pipeline pressure in the refrigerant pipeline (403).

3. The thermal management system for electric working machinery according to claim 2, characterized in that: The electric motor (5) is electrically connected to the electric control module (105). When the air-conditioning system (4) is in cooling mode, the electric control module (105) controls the electric motor (5) to rotate at the maximum speed according to the maximum speed of the electric motor (5) corresponding to the coolant temperature, the hydraulic oil temperature and the pipeline pressure.

4. The thermal management system for electric working machinery according to claim 2, characterized in that: The number of the pressure sensors (402) is at least two, one of the pressure sensors (402) is a low pressure sensor (4021), and the other of the pressure sensors (402) is a high pressure sensor (4022).

5. The thermal management system for electric working machinery according to claim 2, characterized in that: The electric motor (5) is electrically connected to the electric control module (105). When the air conditioning system (4) is in a shutdown mode, the electric control module (105) controls the electric motor (5) to rotate at the maximum speed according to the maximum speed of the electric motor (5) corresponding to the coolant temperature and the hydraulic oil temperature.

6. The thermal management system for electric working machinery according to claim 1, characterized in that: The motor electronically controlled cooling system (1) further comprises an electronic water pump (104), an electronic control module (105) and a main pump motor (106); the coolant radiator (101) comprises a water outlet and a water inlet; the electronic water pump (104), the electronic control module (105) and the main pump motor (106) all have channels for the flow of coolant; the water outlet is sequentially connected to the channel of the electronic water pump (104), the channel of the electronic control module (105), the channel of the main pump motor (106) and the water inlet through a coolant pipeline (103) to form a circulation loop.

7. The thermal management system of an electric working machine according to any one of claims 1 to 6, characterized in that: The heat dissipation fan (3) is a mechanical fan (301).

8. The thermal management system of an electric working machine according to any one of claims 1 to 6, characterized in that: The air conditioning system (4) further comprises a condenser (404), wherein the condenser (404) is arranged opposite to the cooling fan (3) and is located on a side of the hydraulic oil radiator (201) and the coolant radiator (101) away from the cooling fan (3), and the cooling fan (3) is a negative pressure fan.

9. The thermal management system of an electric working machine according to any one of claims 1 to 6, characterized in that: The motor (5) is a double-shaft motor, one output shaft of the double-shaft motor is coaxially connected to the compressor (401), and the other output shaft of the double-shaft motor is coaxially connected to the cooling fan (3).

10. An electric working machine, characterized in that: include: The thermal management system for an electric working machine according to any one of claims 1 to 9.

Images