Multifunctional expansion water tank and heat dissipation system for electric telescopic arm forklift

Abstract

The utility model discloses a multifunctional expansion water tank and heat dissipation system for an electric telescopic arm forklift. The multifunctional expansion water tank and heat dissipation system comprises an air conditioner water tank, a battery heat dissipation water tank and a motor heat dissipation water tank. The air conditioner water tank, the battery heat dissipation water tank and the motor heat dissipation water tank are sequentially arranged on a bracket on the side portion of the frame side by side at intervals to form an expansion water tank module, and a separation structure is arranged between every two adjacent water tanks for separation and supporting. The air conditioner water tank, the battery heat dissipation water tank and the motor heat dissipation water tank are integrated, space occupation is reduced, the space utilization rate is increased, daily maintenance and overhaul are facilitated, in addition, the integrated heat dissipation water tank arrangement is also convenient for pipeline arrangement, pipeline arrangement can be effectively simplified, pipeline joints are remarkably reduced, and the cost is reduced. And the risk of pipeline leakage is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of forklift cooling technology, and in particular to a multi-functional expansion tank and cooling system for electric telescopic boom forklifts. Background Technology

[0002] Electric telescopic boom forklifts are widely used in ports, warehousing, and construction due to their zero emissions and low noise. However, the high-energy-density battery packs, high-power drive motors, and complex thermal management systems brought about by electrification place higher demands on the vehicle's space and cooling system. Therefore, electric telescopic boom forklifts face numerous challenges, including the need for managing multiple heat sources, stringent space constraints, and high maintenance complexity.

[0003] Currently, the thermal management solutions for electric telescopic forklifts mainly adopt a decentralized layout with independent systems. This means that the motor cooling system, battery temperature control system, and air conditioning heating system each have their own independent water tanks and piping. This decentralized layout has certain drawbacks, specifically: 1. Installation space conflicts: The motor cooling water tank is usually installed on the side of the frame, the battery temperature control water tank is placed on top of the battery compartment, and the air conditioning heating water tank is close to the cab. This often leads to overlap between the water tanks and components such as hydraulic lines and sensor harnesses, forcing the use of external supports to increase the vehicle's width or raising the installation height, affecting the center of gravity stability. 2. Dispersed maintenance access: The access ports for each water tank are located in different positions, requiring multi-position operation during maintenance. For example, maintenance of the motor water tank requires removing the side panel, battery water tank maintenance requires opening the battery compartment cover, and the air conditioning water tank access port is generally hidden inside the cab interior panel, making disassembly difficult and maintenance inefficient. 3. Increased risk of leakage: The number of pipe joints increases with the system dispersion. For each additional independent water tank, the number of leakage points increases by 4-6 (including inlet and outlet, air vent, sensor interface, etc.). Based on FMEA failure mode analysis, the probability of coolant leakage is 2-3 times higher under the independent layout of the three systems than that of the integrated solution.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0005] In view of this, the present invention provides a multi-functional expansion tank for electric telescopic forklifts, which occupies little space, can provide cooling medium for the motor, battery and air conditioner respectively, has fewer pipe joints to reduce the risk of leakage, and has the inspection port located in one place for easy maintenance.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A multi-functional expansion tank for electric telescopic forklifts includes: an air conditioning water tank, a battery cooling water tank, and a motor cooling water tank.

[0008] The air conditioning water tank, the battery cooling water tank, and the motor cooling water tank are arranged side by side and spaced apart on a bracket on the side of the vehicle frame to form an expansion water tank module. A partition structure is provided between adjacent water tanks for separation and support.

[0009] Preferably, the air conditioning water tank, the battery cooling water tank, and the motor cooling water tank are all rectangular water tanks, and the length of the water tanks decreases sequentially along the arrangement direction from the air conditioning water tank to the motor cooling water tank, forming a stepped arrangement.

[0010] Preferably, the outlets of the air conditioning water tank, the battery cooling water tank, and the motor cooling water tank are all located on the lower sidewalls of the air conditioning water tank, the battery cooling water tank, and the motor cooling water tank, respectively.

[0011] Preferably, the air conditioning water tank vent, the battery cooling water tank vent, and the motor cooling water tank vent are all located on the side wall of the air conditioning water tank, the battery cooling water tank, and the motor cooling water tank on the side away from the vehicle frame.

[0012] This utility model also proposes a cooling system for an electric telescopic forklift, comprising the multi-functional expansion tank, motor cooling system, and integrated thermal management unit described in the above embodiments; the motor cooling system is used to cool the motor; the integrated thermal management unit includes an air conditioning cooling circuit and a battery cooling circuit, the air conditioning cooling circuit cooling the air conditioner and the battery cooling circuit cooling the battery; the air conditioning tank, the battery cooling tank, and the motor cooling tank respectively provide and receive cooling media for the motor cooling system, the air conditioning cooling circuit, and the battery cooling circuit.

[0013] Preferably, the motor cooling system includes a motor radiator, a motor water pump, a working motor, a working motor controller, a travel motor, and a travel motor controller. The motor radiator is connected in series with the motor water pump, the working motor controller, and the working motor via pipes to form a working motor cooling circuit. The motor radiator is also connected in series with the motor water pump, the travel motor controller, and the travel motor via pipes to form a travel motor cooling circuit. The working motor cooling circuit and the travel motor cooling circuit are connected in parallel.

[0014] Preferably, the cooling system for the electric telescopic forklift further includes a heat exchange circuit; the heat exchange circuit is connected in parallel with the air conditioning cooling circuit, and the heat exchange circuit and the battery cooling circuit exchange heat through a heat exchanger.

[0015] Preferably, the air conditioning cooling circuit includes a compressor, a condenser, and an evaporator; the compressor is connected in series with the condenser and the evaporator via pipelines; the compressor is connected in series with the first passage of the condenser and the heat exchanger via pipelines; the motor cooling circuit includes a water pump, a thermistor, and a battery; the water pump is connected in series with the second passage of the heat exchanger, the thermistor, and the battery via pipelines.

[0016] Preferably, both the air conditioning cooling circuit and the heat exchange circuit are equipped with a solenoid valve and an expansion valve, wherein the solenoid valve and the expansion valve are sequentially arranged on the pipeline from the condenser to the evaporator; and the solenoid valve and the expansion valve are sequentially arranged on the pipeline from the condenser to the heat exchanger.

[0017] The beneficial effects of this utility model are as follows: Compared with the prior art, the multi-functional expansion tank for electric telescopic forklifts disclosed in this application integrates the air conditioning water tank, battery cooling water tank and motor cooling water tank into one place, which not only reduces space occupation and improves space utilization, but also facilitates daily maintenance and repair. In addition, the integrated cooling water tank arrangement also facilitates pipeline layout, which can effectively simplify pipeline layout, thereby significantly reducing pipeline joints and thus effectively reducing the risk of pipeline leakage.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1 This is an assembly drawing of the multifunctional expansion tank of this utility model;

[0020] Figure 2 This is a structural schematic diagram of the multifunctional expansion tank of this utility model (first-person view);

[0021] Figure 3 This is a structural schematic diagram of the multifunctional expansion tank of this utility model (second view);

[0022] Figure 4 This is a flowchart of the motor water cooling system of this utility model;

[0023] Figure 5 This is a flowchart of the integrated thermal management unit of this utility model.

[0024] Figure label:

[0025] 100. Multi-functional expansion tank for electric telescopic forklifts;

[0026] 1. Air conditioner water tank; 11. Air conditioner water tank outlet; 12. Air conditioner water tank vent;

[0027] 2. Battery cooling water tank; 21. Battery cooling water tank outlet; 22. Battery cooling water tank vent;

[0028] 3. Motor cooling water tank; 31. Motor cooling water tank outlet; 32. Motor cooling water tank vent;

[0029] 4. Frame. Detailed Implementation

[0030] This utility model discloses a multi-functional expansion tank 100 for electric telescopic forklifts, which can quickly block water and improve the emergency response capability for water damage control.

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] The following is for reference. Figures 1 to 5 This invention describes a multi-functional expansion tank 100 for an electric telescopic forklift.

[0034] This application discloses a multi-functional expansion tank 100 for electric telescopic forklifts, including: an air conditioning water tank 1, a battery cooling water tank 2, and a motor cooling water tank 3.

[0035] Among them, the air conditioning water tank 1, the battery cooling water tank 2 and the motor cooling water tank 3 are placed side by side on the bracket on the side of the frame 4 to form an expansion water tank module, and a partition structure is set between adjacent water tanks for separation and support.

[0036] Compared with the existing technology where the cooling water tanks of air conditioners, batteries and motors are arranged separately, the expansion tank of this application integrates the air conditioner water tank 1, the battery cooling water tank 2 and the motor cooling water tank 3 into one place. This not only reduces space occupation and improves space utilization, but also facilitates daily maintenance and repair. In addition, the integrated cooling water tank arrangement also facilitates pipeline layout, which can effectively simplify pipeline layout, thereby significantly reducing pipeline joints and thus effectively reducing the risk of pipeline leakage.

[0037] In some embodiments, for example Figure 1 and Figure 2 As shown, the air conditioner water tank 1, the battery cooling water tank 2, and the motor cooling water tank 3 are all rectangular water tanks. Along the arrangement direction from the air conditioner water tank 1 to the motor cooling water tank 3, the length of the water tanks decreases sequentially, forming a stepped arrangement. This effectively reduces space occupation and improves space utilization.

[0038] In some embodiments, for example Figure 3 As shown, the air conditioner water tank outlet 11, the battery cooling water tank outlet 21, and the motor cooling water tank outlet 31 are all located on the lower side wall of the air conditioner water tank 1, the battery cooling water tank 2, and the motor cooling water tank 3, respectively. This facilitates future maintenance and repair, and also allows the outlets to face to one side, which simplifies the pipeline layout and further reduces the risk of pipeline leakage.

[0039] In some embodiments, for example Figure 2 As shown, the air conditioning water tank vent 12, the battery cooling water tank vent 22, and the motor cooling water tank vent 32 are all located on the side wall of the air conditioning water tank 1, the battery cooling water tank 2, and the motor cooling water tank 3, respectively, on the side away from the frame 4. This facilitates future maintenance and repair, and also allows the outlets to face to one side, which simplifies the pipeline layout and further reduces the risk of pipeline leakage.

[0040] This utility model also proposes a heat dissipation system for electric telescopic forklifts, which includes the multi-functional expansion tank 100 for electric telescopic forklifts, the motor cooling system, and the integrated thermal management unit described in the above embodiments.

[0041] The motor cooling system is used to dissipate heat from the motor. The integrated thermal management unit includes an air conditioning cooling circuit and a battery cooling circuit. The air conditioning cooling circuit cools the air conditioner, and the battery cooling circuit cools the battery. The air conditioning water tank 1, the battery cooling water tank 2, and the motor cooling water tank 3 provide and receive cooling media for the motor cooling system, the air conditioning cooling circuit, and the battery cooling circuit, respectively.

[0042] In some embodiments, for example Figure 4 As shown, the motor cooling system includes a motor radiator, a motor water pump, a working motor, a working motor controller, a travel motor, and a travel motor controller. The motor radiator is connected in series with the motor water pump, the working motor controller, and the working motor via pipes to form a working motor cooling circuit. The motor radiator is also connected in series with the motor water pump, the travel motor controller, and the travel motor via pipes to form a travel motor cooling circuit. The working motor cooling circuit and the travel motor cooling circuit are connected in parallel.

[0043] In some embodiments, the cooling system for electric telescopic forklifts further includes a heat exchange circuit; the heat exchange circuit is connected in parallel with the air conditioning cooling circuit, and the heat exchange circuit and the battery cooling circuit exchange heat through a heat exchanger.

[0044] Furthermore, the air conditioning cooling circuit includes a compressor, a condenser, and an evaporator; the compressor is connected in series with the condenser and the evaporator via pipelines; the compressor is connected in series with the first passage of the condenser and the heat exchanger via pipelines; the motor cooling circuit includes a water pump, a thermistor, and a battery; the water pump is connected in series with the second passage of the heat exchanger, the thermistor, and the battery via pipelines.

[0045] After being pressurized and cooled by the compressor and condenser, the cooling medium enters the air conditioning cooling circuit and the heat exchange circuit respectively. In the heat exchange circuit, the high-pressure, low-temperature cooling medium flows into the first passage of the heat exchanger. At the same time, the cooling medium in the motor cooling circuit is pumped into the second passage of the heat exchanger by a water pump. Inside the heat exchanger, the high-pressure, low-temperature medium in the first passage exchanges heat with the high-temperature medium in the second passage to reduce the temperature of the cooling medium in the second passage, so that it can dissipate heat from the battery after flowing out of the heat exchanger.

[0046] The aforementioned integrated thermal management unit simultaneously provides cooling to the air conditioner and cools the battery through the compressor and condenser, improving the integration of the heat dissipation system and making the system easier to manage.

[0047] Furthermore, for example Figure 5 As shown, both the air conditioning cooling circuit and the heat exchange circuit are equipped with solenoid valves and expansion valves, respectively. The solenoid valves and expansion valves are sequentially installed on the pipeline from the condenser to the evaporator; the solenoid valves and expansion valves are sequentially installed on the pipeline from the condenser to the heat exchanger.

[0048] Other components and operations of the multi-functional expansion tank 100 and heat dissipation system for electric telescopic forklifts according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-functional expansion tank for electric reach truck, characterized in that, Comprise: Air conditioner water tank, battery heat dissipation water tank and motor heat dissipation water tank; The air conditioner water tank, the battery heat dissipation water tank and the motor heat dissipation water tank are sequentially and side by side arranged on the bracket of the side of the frame to form an expansion water tank module, and a separation structure is arranged between adjacent water tanks to separate and support.

2. The multifunctional expansion water tank for electric telescopic handler forklift according to claim 1, characterized in that, The air conditioner water tank, the battery heat dissipation water tank and the motor heat dissipation water tank are all rectangular water tanks, and the length of the water tank decreases in turn along the arrangement direction from the air conditioner water tank to the motor heat dissipation water tank, and the water tank is arranged in a stepped shape.

3. The multifunctional expansion water tank for electric telescopic handler forklift according to claim 2, characterized in that, The air conditioner water tank outlet, the battery heat dissipation water tank outlet and the motor heat dissipation water tank outlet are respectively arranged on the lower side wall of the air conditioner water tank, the battery heat dissipation water tank and the motor heat dissipation water tank.

4. The multi-functional expansion tank for electric telescopic handler forklift truck according to claim 2, characterized in that, The air conditioner water tank exhaust port, the battery heat dissipation water tank exhaust port and the motor heat dissipation water tank exhaust port are respectively arranged on the side wall of the air conditioner water tank, the battery heat dissipation water tank and the motor heat dissipation water tank away from the frame.

5. A heat dissipation system for an electric reach truck, characterized in that The multifunctional expansion water tank for electric telescopic arm forklift, the motor cooling system and the integrated heat management unit according to any one of the preceding claims 1-4 are comprised; The motor cooling system is used for cooling and dissipating heat of the motor; The integrated heat management unit comprises an air conditioner cooling circuit and a battery cooling circuit, the air conditioner cooling circuit is used for cooling and dissipating heat of the air conditioner, and the battery cooling circuit is used for cooling and dissipating heat of the battery; The air conditioner water tank, the battery heat dissipation water tank and the motor heat dissipation water tank respectively provide and receive cooling medium for the motor cooling system, the air conditioner cooling circuit and the battery cooling circuit.

6. The heat dissipation system for electric telescopic handler as claimed in claim 5, characterized in that, The motor cooling system comprises a motor radiator, a motor water pump, a working motor, a working motor controller, a driving motor and a driving motor controller, the motor radiator is connected in series with the motor water pump, the working motor controller and the working motor through pipelines to form a working motor cooling circuit, the motor radiator is connected in series with the motor water pump, the driving motor controller and the driving motor through pipelines to form a driving motor cooling circuit, and the working motor cooling circuit and the driving motor cooling circuit are connected in parallel.

7. The heat dissipation system for electric telescopic handler as claimed in claim 5, wherein, A heat exchange circuit is further comprised; the heat exchange circuit is connected in parallel with the air conditioner cooling circuit, and the heat exchange circuit and the battery cooling circuit are heat exchanged through a heat exchanger.

8. The heat dissipation system for electric telescopic handler as claimed in claim 7, characterized in that, The air conditioner cooling circuit comprises a compressor, a condenser and an evaporator; the compressor is connected in series with the condenser and the evaporator through pipelines; the compressor is connected in series with the condenser and the first passage of the heat exchanger through pipelines; The motor cooling circuit comprises a water pump, a thermistor and a battery; the water pump is connected in series with the second passage of the heat exchanger, the thermistor and the battery through pipelines.

9. The heat dissipation system for electric telescopic handler as claimed in claim 8, characterized in that, The air conditioner cooling circuit and the heat exchange circuit are respectively provided with electromagnetic valves and expansion valves, the electromagnetic valves and the expansion valves are sequentially arranged on the pipelines from the condenser to the evaporator, and the electromagnetic valves and the expansion valves are sequentially arranged on the pipelines from the condenser to the heat exchanger.

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