Integrated coupling heating system for engineering machinery and electric loader

Abstract

The utility model discloses an integrated coupling heating system for engineering machinery and an electric loader, the integrated coupling heating system for engineering machinery comprises a battery thermal management loop, a cab warm air loop and an electric heat dissipation loop, the battery thermal management loop comprises a battery temperature adjusting road section and a self-circulation control road section provided with a first stop valve, the cab warm air loop comprises a warm air water outlet road section and a heating control road section provided with a water heater, the two ends of the battery temperature adjusting road section are connected with the two ends of the heating control road section in a one-to-one correspondence mode through a heating sharing road section, and a second stop valve is arranged on the heating sharing road section. The two ends of the self-circulation control road section are connected with the electric-driven heat dissipation loop through the electric-driven heat supply road section, a third stop valve is arranged on the electric-driven heat supply road section, and different loops can be constructed by controlling opening or closing of the stop valve, so that heat of the water heater or an electric-driven system is used for heating a battery, and the heat dissipation efficiency is improved. The material cost is reduced; and the energy utilization rate is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction machinery, and particularly relates to an integrated coupling heating system for construction machinery and an electric loader. Background Art

[0002] Among the working components and places of an electric loader, those with clear heat management requirements include: the cab, battery, motor, high-voltage controller, gearbox, etc. Among them, the motor and high-voltage controller only have heat dissipation requirements, the cab and battery have both heat dissipation requirements and heating requirements, and the gearbox generally only has heat dissipation requirements, but has heating requirements in extremely low temperature conditions. In the prior art, the cab heating, battery heating, and heat dissipation of the electric drive system are realized by three sets of independent thermal control systems respectively, resulting in high material costs. Moreover, the heat of the electric drive heat dissipation system is completely transferred to the atmosphere naturally, and when the battery needs to be heated, it needs to consume electric energy specifically to generate heat, with low energy utilization efficiency. Summary of the Utility Model

[0003] Aiming at the above defects or deficiencies, the utility model provides an integrated coupling heating system for construction machinery and an electric loader, aiming to solve the technical problems of high material costs and low energy utilization efficiency of the existing thermal management system.

[0004] To achieve the above object, the utility model provides an integrated coupling heating system for construction machinery. The integrated coupling heating system for construction machinery includes a battery thermal management loop, a cab warm air loop, and an electric drive heat dissipation loop. The battery thermal management loop includes a battery temperature adjustment section for adjusting the battery temperature and a self-circulation control section provided with a first cut-off valve. The cab warm air loop includes a heating control section provided with a water heater and a warm air outlet section for blowing air into the cab. The electric drive heat dissipation loop is used for dissipating heat from the electric drive system. The two ends of the battery temperature adjustment section are respectively connected to the two ends of the heating control section through two heating common sections in a one-to-one correspondence, and second cut-off valves are provided on both heating common sections. The two ends of the self-circulation control section are respectively connected to the electric drive heat dissipation loop through two electric drive heat supply sections, and third cut-off valves are provided on both electric drive heat supply sections.

[0005] In an embodiment of the utility model, the electric drive heat dissipation loop includes a circulation control section and an electric drive heat dissipation section. An electric drive circulation pump is provided on the circulation control section, and a radiator is provided on the electric drive heat dissipation section and passes through a motor device and an electric control device in sequence.

[0006] In an embodiment of the present utility model, the electric drive heat dissipation section includes a main heat dissipation path, a liquid cooling main path, a first liquid cooling branch path, and a second liquid cooling branch path. A radiator is provided on the main heat dissipation path. The liquid cooling main path passes through an electric control device. The first liquid cooling branch path and the second liquid cooling branch path are connected in parallel between the main heat dissipation path and the liquid cooling main path. The first liquid cooling branch path passes through the driving motor of the motor device, and the second liquid cooling branch path passes through the working motor of the motor device.

[0007] In an embodiment of the present utility model, the integrated coupling heating system for construction machinery further includes a gearbox heat dissipation loop. A heat exchanger and an oil pump are provided on the gearbox heat dissipation loop. In two flow channels of the heat exchanger, one flow channel is connected to the oil pump and the gearbox, and the other flow channel is connected in series to the first liquid cooling branch path.

[0008] In an embodiment of the present utility model, a battery circulation water pump and a battery module water channel are provided on the battery temperature regulation section, and a warm air circulation water pump and a warm air core are provided on the warm air outlet section.

[0009] In an embodiment of the present utility model, a refrigerator is further provided on the battery temperature regulation section.

[0010] In an embodiment of the present utility model, the integrated coupling heating system for construction machinery further includes a controller, an inlet temperature sensor, and an outlet temperature sensor. The inlet temperature sensor and the outlet temperature sensor are respectively provided at the inlet and outlet of the battery module water channel in a one-to-one correspondence. The controller is respectively communicatively connected to the refrigerator, the inlet temperature sensor, and the outlet temperature sensor. The controller is used to control the start and stop of the refrigerator according to the feedback data of the inlet temperature sensor and the outlet temperature sensor.

[0011] In an embodiment of the present utility model, the first stop valve, the second stop valve, and the third stop valve are all set as electromagnetic valves.

[0012] In an embodiment of the present utility model, an independent liquid storage tank is respectively connected to the battery thermal management loop, the electric drive heat dissipation loop, and the warm air loop.

[0013] To achieve the above object, the present utility model further provides an electric wheel loader, wherein the electric wheel loader includes the above-mentioned integrated coupling heating system for construction machinery.

[0014] Through the above technical solutions, the integrated coupling heating system for construction machinery provided by the embodiments of the present utility model has the following beneficial effects:

[0015] When using the integrated coupling heating system for construction machinery described above, when the first stop valve is open, the second stop valve is closed, and the third stop valve is closed, the battery thermal management circuit, the cab heating circuit, and the electric drive heat dissipation circuit are in a disconnected state, working independently of each other without interference; when the first stop valve is closed, the second stop valve is open, and the third stop valve is closed, the battery temperature regulation section and the heating control section are connected, and the water heater can supply heat to both the battery temperature regulation section and the warm air outlet section at the same time; when the first stop valve is closed, the second stop valve is closed, and the third stop valve is open, the electric drive heat dissipation circuit is connected to the battery temperature regulation section, and the remaining temperature of the liquid in the heat dissipation circuit is used to supply heat to the battery temperature regulation section; when the first stop valve is closed, the second stop valve is open, and the third stop valve is open, the water heater and the electric drive heat dissipation circuit can supply heat to the battery temperature regulation section at the same time. By controlling the coupling or disconnection of the battery thermal management circuit with the cab heating circuit and the electric drive heat dissipation circuit, three battery heating conditions can be achieved, so as to facilitate the selection of the heating condition according to the actual temperature of the battery. Moreover, during the battery heating process, the water heater in the cab heating circuit and the electric drive heat dissipation circuit are utilized. On the one hand, the number of water heaters is reduced, and the material cost is lowered. On the other hand, the heat in the electric drive heat dissipation circuit is effectively utilized, reducing the energy loss.

[0016] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide an understanding of the present utility model and form a part of the specification, and are used together with the following specific implementation to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 is a schematic diagram of the integrated coupling heating system for construction machinery according to an embodiment of the present utility model;

[0019] Figure 2 is a schematic diagram of the battery thermal management circuit according to an embodiment of the present utility model;

[0020] Figure 3 is a schematic diagram of the cab heating circuit according to an embodiment of the present utility model;

[0021] Figure 4 is a schematic diagram of the electric drive heat dissipation circuit according to an embodiment of the present utility model;

[0022] Figure 5 is a schematic diagram when the battery is heated according to an embodiment of the present utility model.

[0023] DESCRIPTION OF THE REFERENCE NUMERALS

[0024] 100 Battery thermal management circuit 110 Battery temperature regulation section

[0025] 120 Self - circulation control section 200 Cab heating circuit

[0026] 210 Heating control section 220 Warm - air outlet section

[0027] 230 Heating common section 300 Electric - drive heat dissipation circuit

[0028] 310 Circulation control section 320 Electric - drive heat dissipation section

[0029] 321 Heat dissipation main path 322 Liquid - cooling main path

[0030] 323 First liquid - cooling branch 324 Second liquid - cooling branch

[0031] 330 Electric - drive heat - supply section 1 First stop valve

[0032] 2 Second stop valve 3 Third stop valve

[0033] 4 Water heater 5 Warm - air core

[0034] 6 Warm - air circulation water pump 7 Battery circulation water pump

[0035] 8 Electric - drive circulation water pump 9 Inlet temperature sensor

[0036] 10 Outlet temperature sensor 11 Refrigerator

[0037] 12 Radiator 13 Traveling motor

[0038] 14 Heat exchanger 15 Motor control unit

[0039] 16 Working motor 17 Electric control device

[0040] 18 Liquid storage tank 19 Battery module water channel Detailed implementation manners

[0041] The following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0042] The integrated coupled heating system for construction machinery and the electric wheel loader of the present utility model will be described below with reference to the drawings.

[0043] As Figures 1 to 4 shown, the present utility model provides an integrated coupled heating system for construction machinery, wherein the integrated coupled heating system for construction machinery includes:

[0044] The battery thermal management circuit 100 includes a battery temperature adjustment section 110 capable of adjusting the battery temperature, and a self-circulation control section 120 provided with a first cut-off valve 1;

[0045] The cab heating circuit 200 includes a heating control section 210 provided with a water heater 4 and a warm air outlet section 220 for blowing air into the cab;

[0046] The electric drive heat dissipation circuit 300 is used for dissipating heat from the electric drive system;

[0047] Wherein, both ends of the battery temperature adjustment section 110 are respectively and correspondingly connected to both ends of the heating control section 210 through two common heating sections 230, and second cut-off valves 2 are provided on both common heating sections 230. Both ends of the self-circulation control section 120 are respectively connected to the electric drive heat dissipation circuit 300 through two electric drive heat supply sections 330, and third cut-off valves 3 are provided on both electric drive heat supply sections 330.

[0048] When using the above integrated coupling heating system for construction machinery, when the first cut-off valve 1 is open, the second cut-off valve 2 is closed, and the third cut-off valve 3 is closed, the battery thermal management circuit 100, the cab heating circuit 200, and the electric drive heat dissipation circuit 300 are in a disconnected state, working independently of each other without interference; when the first cut-off valve 1 is closed, the second cut-off valve 2 is open, and the third cut-off valve 3 is closed, the battery temperature adjustment section 110 and the heating control section 210 are connected, and the water heater 4 can supply heat to both the battery temperature adjustment section 110 and the warm air outlet section 220 at the same time; when the first cut-off valve 1 is closed, the second cut-off valve 2 is closed, and the third cut-off valve 3 is open, the electric drive heat dissipation circuit 300 is connected to the battery temperature adjustment section 110, and the residual temperature of the liquid in the heat dissipation circuit is used to supply heat to the battery temperature adjustment section 110; when the first cut-off valve 1 is closed, the second cut-off valve 2 is open, and the third cut-off valve 3 is open, the water heater 4 and the electric drive heat dissipation circuit 300 can supply heat to the battery temperature adjustment section 110 at the same time. By controlling the coupling or disconnection of the battery thermal management circuit 100 with the cab heating circuit 200 and the electric drive heat dissipation circuit 300, three battery heating working conditions can be realized, so as to facilitate the selection of the heating working condition according to the actual temperature of the battery. Moreover, during the battery heating process, the water heater 4 of the cab heating circuit 200 and the electric drive heat dissipation circuit 300 are utilized. On the one hand, the number of water heaters 4 is reduced, and the material cost is lowered. On the other hand, the heat of the electric drive heat dissipation circuit 300 is effectively utilized, and the energy loss is reduced.

[0049] Specifically, refer to Figure 1 and Figure 5, the number of the second cut-off valve 2 and the third second cut-off valve 2 is two each, and they are respectively arranged corresponding to the inlets and outlets of the battery temperature regulation section 110 and the self-circulation control section 120. By setting five cut-off valves, the coupling and separation of the cab warm air circuit 200, the battery thermal management circuit 100, and the electric drive heat dissipation circuit 300 can be realized. The cut-off valve has only two states: open and closed, with simple control and a lower probability of failure.

[0050] As Figure 1 , Figure 4 and Figure 5 shown, in the embodiment of the present utility model, the electric drive heat dissipation circuit 300 includes a circulation control section 310 and an electric drive heat dissipation section 320. An electric drive circulation water pump 8 is provided on the circulation control section 310, and a radiator 12 is provided on the electric drive heat dissipation section 320 and passes through the motor device and the electric control device 17 in sequence. By separately setting the electric drive circulation water pump 8 on the circulation control section 310, when the first cut-off valve 1 is closed and the third cut-off valve 3 is open, the electric drive circulation water pump 8 can be turned off, and the battery circulation water pump 7 drives the coolant to circulate in the direction shown in Figure 5 , without the need for the electric drive circulation water pump 8 to work, reducing the energy consumption of the system.

[0051] In the embodiment of the present utility model, the electric drive heat dissipation section 320 includes a heat dissipation main path 321, a liquid cooling main path 322, a first liquid cooling branch path 323, and a second liquid cooling branch path 324. The radiator 12 is provided on the heat dissipation main path 321, the liquid cooling main path 322 passes through the electric control device 17, and the first liquid cooling branch path 323 and the second liquid cooling branch path 324 are connected in parallel between the heat dissipation main path 321 and the liquid cooling main path 322. The first liquid cooling branch path 323 passes through the driving motor 13 of the motor device, and the second liquid cooling branch path 324 passes through the working motor 16 of the motor device. Then, the integrated coupling heating system provided by the present utility model is particularly suitable for thermal management of engineering machinery equipment. Different from ordinary passenger cars, engineering machinery equipment (such as loaders) is equipped with a working motor 16 for performing engineering operations in addition to the driving motor for traveling. By setting the first liquid cooling branch path 323 and the second liquid cooling branch path 324, the heat dissipation systems of the two motors are combined, reducing the equipment cost.

[0052] In the embodiment of the present utility model, the integrated coupling heating system for engineering machinery also includes a gearbox heat dissipation circuit. A heat exchanger 14 and an oil pump are provided on the gearbox heat dissipation circuit. In the two flow channels of the heat exchanger 14, one flow channel is connected to the oil pump and the gearbox, and the other flow channel is connected in series to the first liquid cooling branch path 323. The gearbox uses oil cooling and the motor uses water cooling. By setting the heat exchanger 14, the two heat dissipation circuits share a radiator 12, reducing the system cost.

[0053] In the embodiment of the present utility model, the second liquid cooling branch path 324 also passes through the motor control unit 15 of the working motor 16.

[0054] As Figures 1 to 3 shown, in the embodiment of the present utility model, a battery circulating water pump 7 and a battery module water channel 19 are provided on the battery temperature regulation section 110, and a warm air circulating water pump 6 and a warm air core 5 are provided on the warm air outlet section 220. The battery circulating water pump 7 and the warm air circulating water pump 6 can work independently. In an environment where the cab does not need heating, the warm air circulating water pump 6 is turned off, which can prevent the coolant from flowing along the warm air outlet section 220 and causing the cab temperature to rise.

[0055] As Figure 1 and Figure 2 shown, in the embodiment of the present utility model, a cooler 11 is also provided on the battery temperature regulation section 110. The battery also generates heat during the external discharge process. After the battery temperature reaches the preset temperature value, the first cut-off valve 1 opens, and the second cut-off valve 2 and the third cut-off valve 3 close. The battery thermal management circuit 100 works independently, and the temperature of the battery is regulated by the cooler 11.

[0056] Specifically, the integrated coupling heating system for construction machinery further includes a controller, an inlet temperature sensor 9, and an outlet temperature sensor 10. The inlet temperature sensor 9 and the outlet temperature sensor 10 are respectively arranged at the inlet and outlet of the battery module water channel in a one-to-one correspondence. The controller is respectively communicatively connected to the cooler 11, the inlet temperature sensor 9, and the outlet temperature sensor 10. The controller is used to control the start and stop of the cooler 11 according to the feedback data of the inlet temperature sensor 9 and the outlet temperature sensor 10. The inlet temperature sensor 9 and the outlet temperature sensor 10 are respectively used to detect the temperatures at the inlet and outlet of the battery module water channel. The controller calculates the temperature difference according to the data fed back by the inlet temperature sensor 9 and the outlet temperature sensor 10. If the temperature difference is large, it indicates that the battery is at a relatively high temperature, and the cooler 11 needs to be turned on or the power of the cooler 11 needs to be increased. Similarly, when heating the battery, if the temperature difference is large, it indicates that the battery is at a relatively low temperature, and the power of the water heater 4 needs to be increased, or the second cut-off valve 2 and the third cut-off valve 3 are opened simultaneously, and the water heater 4, the electric drive device, and the electronic control device 17 are used to supply heat to the battery simultaneously.

[0057] In the embodiment of the present utility model, the first cut-off valve 1, the second cut-off valve 2, and the third cut-off valve 3 are all set as electromagnetic valves. The cut-off valve refers to a valve that has two states: open and closed, with simple control and high reliability. Of course, the on-off of the circuit can also be realized by changing the position of the spool of a multi-position sliding valve or a rotary valve.

[0058] As Figure 1 shown, in the embodiment of the present utility model, the battery thermal management circuit 100, the electric drive heat dissipation circuit 300, and the cab warm air circuit 200 are respectively connected to an independent liquid storage tank 18 to ensure that each circuit can be replenished with coolant in a timely manner under different working conditions.

[0059] To achieve the above objectives, the present utility model also provides an electric wheel loader, wherein the electric wheel loader includes the above-mentioned integrated coupling heating system for construction machinery. Specifically, the electric wheel loader has the following operating conditions:

[0060] System isolated operation condition; in this condition, the cab and the battery do not need to be heated. The first cut-off valve 1 is opened, and the second cut-off valve 2 and the third cut-off valve 3 are closed. At this time, the water circulation in the cab, the battery water circulation, and the electric heat dissipation hot water circulation are in various isolated states. The heat of the electric drive device and the electronic control device 17 is directly transferred to the atmosphere.

[0061] Rapid battery temperature rise condition; when the ambient temperature of the electric wheel loader is relatively low, at the initial stage of operation, it is necessary to quickly increase the battery temperature in a short time to quickly restore the power supply capacity of the battery. The controller controls the first cut-off valve 1 to close, the second cut-off valve 2 and the third cut-off valve 3 to open, and the electric drive circulation water pump 8 to close. The battery circulation water pump 7 provides the power source, and the liquid flow direction is as Figure 5 shown. In this condition, most of the heat in the electric drive heat dissipation circuit 300 is transferred to the battery through the coupled water circuit system. At the same time, to accelerate the temperature rise, the water heater 4 also directly consumes electric energy to generate heat to heat the coolant in the circuit, with the maximum heating power.

[0062] Battery heat preservation condition; after the electric wheel loader quickly warms up in a short time, the power supply capacity of the battery is somewhat restored. At this time, the controller controls the water heater 4 to close, stops consuming electric energy for heating, and closes the second cut-off valve 2. The heat of the electric drive heat dissipation circuit 300 is used to heat the battery.

[0063] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0064] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0065] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0066] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. An integrated coupling heating system for construction machinery, characterized in that, The integrated coupling heating system for construction machinery includes: A battery thermal management circuit (100), including a battery temperature adjustment section (110) capable of adjusting the battery temperature, and a self-circulation control section (120) provided with a first cut-off valve (1); A cab heating circuit (200), including a heating control section (210) provided with a water heater (4) and a warm air outlet section (220) for blowing air into the cab; An electric drive heat dissipation circuit (300) for dissipating heat from the electric drive system; Wherein, both ends of the battery temperature adjustment section (110) are respectively and correspondingly connected to both ends of the heating control section (210) through two heating common sections (230), and second cut-off valves (2) are provided on both of the two heating common sections (230). Both ends of the self-circulation control section (120) are respectively connected to the electric drive heat dissipation circuit (300) through two electric drive heating sections (330), and third cut-off valves (3) are provided on both of the two electric drive heating sections (330).

2. The integrated coupling heating system for construction machinery according to claim 1, wherein The electric drive heat dissipation circuit (300) includes a circulation control section (310) and an electric drive heat dissipation section (320). An electric drive circulation pump (8) is provided on the circulation control section (310), and a radiator (12) is provided on the electric drive heat dissipation section (320), and it sequentially passes through the motor device and the electric control device (17).

3. The integrated coupling heating system for construction machinery according to claim 2, characterized in that, The electric drive heat dissipation section (320) includes a heat dissipation main path (321), a liquid cooling main path (322), a first liquid cooling branch (323) and a second liquid cooling branch (324). The radiator (12) is provided on the heat dissipation main path (321). The liquid cooling main path (322) passes through the electric control device (17). The first liquid cooling branch (323) and the second liquid cooling branch (324) are connected in parallel between the heat dissipation main path (321) and the liquid cooling main path (322). The first liquid cooling branch (323) passes through the traveling motor (13) of the motor device, and the second liquid cooling branch (324) passes through the working motor (16) of the motor device.

4. The integrated coupling heating system for construction machinery according to claim 3, wherein, The integrated coupling heating system for construction machinery further includes a gearbox heat dissipation circuit. A heat exchanger (14) and an oil pump are provided on the gearbox heat dissipation circuit. In the two flow channels of the heat exchanger (14), one flow channel is connected to the oil pump and the gearbox, and the other flow channel is connected in series to the first liquid cooling branch (323).

5. The integrated coupling heating system for construction machinery according to claim 1, wherein A battery circulation pump (7) and a battery module water channel (19) are provided on the battery temperature adjustment section (110), and a warm air circulation pump (6) and a warm air core (5) are provided on the warm air outlet section (220).

6. The integrated coupling heating system for construction machinery according to claim 5, wherein, A refrigerator (11) is further provided on the battery temperature adjustment section (110).

7. The integrated coupling heating system for construction machinery according to claim 6, characterized in that, The integrated coupling heating system for construction machinery further includes a controller, an inlet temperature sensor (9) and an outlet temperature sensor (10). The inlet temperature sensor (9) and the outlet temperature sensor (10) are respectively arranged at the inlet and outlet of the water channel of the battery module (19). The controller is communicatively connected to the cooler (11), the inlet temperature sensor (9) and the outlet temperature sensor (10) respectively. The controller is used to control the start and stop of the cooler (11) according to the feedback data of the inlet temperature sensor (9) and the outlet temperature sensor (10).

8. The integrated coupling heating system for construction machinery according to any one of claims 1 to 7, characterized in that, The first stop valve (1), the second stop valve (2) and the third stop valve (3) are all set as electromagnetic valves.

9. The integrated coupling heating system for construction machinery according to any one of claims 1 to 7, characterized in that, Independent liquid storage tanks (18) are respectively connected to the battery thermal management circuit (100), the electric drive heat dissipation circuit (300) and the cab heating circuit (200).

10. An electric wheel loader, characterized in that, The electric wheel loader includes the integrated coupling heating system for construction machinery according to any one of claims 1 to 9.

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