Novel cooling system of electric counterbalance forklift truck

Abstract

The invention discloses a novel cooling system of an electric counterbalance forklift truck in the technical field of electric forklift trucks, which comprises a cooling control module, a temperature detection module and a cooling module, and the cooling module comprises a water cooling assembly, an air cooling assembly and an oil cooling assembly. According to the invention, when the temperature of each working module rises, the air cooling assembly in the cooling module is started to carry out air cooling treatment, and when the temperature is relatively high and the conventional air cooling treatment cannot meet the heat dissipation requirement, the heat exchange structure I and the heat exchange structure II are respectively arranged in the air cooling assembly and the oil cooling assembly. The cooling assembly and the first heat exchange structure conduct cooling treatment on airflow in the air cooling assembly, and the air cooling effect is improved. When the temperature of each working module is too high, the water cooling assembly is started to carry out water cooling treatment, so that the cooling effect is ensured; cooling water in the water cooling assembly is conveyed to the second heat exchange structure and exchanges heat with the oil and cools the oil, the water cooling assembly is fully utilized, and the cooling effect on the oil is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric forklifts, in particular to a novel cooling system for an electric counterbalanced forklift. Background Art

[0002] A counterbalanced forklift is equipped with a lifting fork in the front and a counterweight at the rear. Its main components include a power unit, a transmission unit, a steering unit, a working unit, a hydraulic system and a braking unit. It is suitable for loading, unloading, stacking and moving finished goods in ports, stations and enterprises. Electric counterbalanced forklifts also include battery devices and electronic control devices. When an electric counterbalanced forklift is working, its controller, battery, motor and other structures will generate a lot of heat. If the heat dissipation is not in place, it will easily affect the operation of each structure and even affect the overall operation and safety of the forklift.

[0003] Existing forklifts are equipped with cooling fans or water cooling structures at the working structure, but generally only one of the cooling structures is arranged at each structure. Therefore, the cooling fans and water cooling structures at various locations work independently and cannot be flexibly selected and used according to the heat dissipation conditions at different locations, resulting in poor cooling effect.

[0004] Based on this, the present invention designs a novel cooling system for an electric counterbalanced forklift to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a novel cooling system for an electric counterbalanced forklift to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A novel cooling system for an electric counterbalanced forklift, comprising: The forklift control module receives various working information and status information of the forklift, and sends out control information to control various operations and movements of the forklift; The battery module is connected to the forklift control module to provide power for the forklift's electric control structure; A hydraulic module, connected to the forklift control module, provides hydraulic driving force for the hydraulic execution structure of the forklift, including a hydraulic oil tank, hydraulic pipelines and hydraulic cylinders; A driving module, connected to the forklift control module, is used to drive the motion execution structure of the forklift to perform corresponding operations; A cooling control module is connected to the forklift control module, and is used to receive temperature information at the forklift control module, the battery module, the hydraulic module, and the drive module, and to send control information for feedback processing; A temperature detection module, connected to the cooling control module, is used to detect the working environment temperature of the forklift control module, the battery module, the hydraulic module and the drive module; A cooling module, connected to the cooling control module, is used to cool the forklift control module, the battery module, the hydraulic module and the drive module, including a water cooling component, an air cooling component and an oil cooling component; A heat exchange structure 1 is provided in the water cooling component, a heat exchange structure 2 is provided in the oil cooling component, and both the heat exchange structure 1 and the heat exchange structure 2 are connected to the water cooling component.

[0007] Preferably, the water cooling assembly includes a cooler, a water pump and a cooling water tank which are connected in sequence by pipes, the cooler is connected to a cooling water input pipe, the cooling water tank is connected to a cooling water output pipe, and a plurality of branches are provided at one end of the cooling water output pipe away from the cooling water tank, two of which are respectively connected to heat exchange structure one and heat exchange structure two, and the remaining branches are connected to the cooling structures at the forklift control module, battery module, hydraulic module and drive module.

[0008] Preferably, the cooling water output pipe of the cooling water tank is connected to a filter.

[0009] Preferably, the air cooling component includes a heat dissipation cooling fan and an air supply duct, a heat exchange structure is arranged on the air supply duct, and the air supply duct is provided with a plurality of exhaust ducts at one end away from the heat dissipation cooling fan and the heat exchange structure, and the air outlet end of the exhaust duct is arranged at the forklift control module, battery module, hydraulic module and drive module.

[0010] Preferably, the oil cooling component includes an oil cooling pipeline, the second heat exchange structure is located on the oil cooling pipeline, and both ends of the oil cooling pipeline are connected to the hydraulic oil tank of the hydraulic module and are connected to the pump body.

[0011] Preferably, the heat exchange structure 1 and the heat exchange structure 2 have the same structure and include a plurality of heat exchange straight tubes arranged evenly and in parallel, the plurality of heat exchange straight tubes are connected end to end in sequence, and the connecting ends of two adjacent heat exchange straight tubes are connected by a connecting elbow, one end of one of the heat exchange straight tubes located at the outer position is connected to a cooling water inlet pipe, and one end of the other heat exchange straight tube located at the outer position is connected to a cooling water outlet pipe, and the cooling water inlet pipe is connected to the cooling water output pipe, and the cooling water outlet pipe is connected to the cooling water input pipe; Spiral heat exchange fins are provided on the outer side wall of the straight heat exchange tube, and an outer sleeve is fixedly sleeved corresponding to the position of the spiral heat exchange fin. Multiple outer sleeves are connected end to end in sequence, and the connecting ends of two adjacent outer sleeves are connected by a connecting pipe. One end of the outer sleeve located at the outer position is connected to the input pipe, and the other end of the outer sleeve located at the outer position is connected to the output pipe.

[0012] Preferably, the heat dissipation cooling fan is connected to two air supply ducts, one of which is connected to a corresponding heat exchange structure, and the other is connected to a plurality of exhaust ducts, and valves are provided on the two air supply ducts.

[0013] Preferably, a temperature sensor is provided at the heat dissipation cooling fan, and the temperature sensor is connected to the cooling control module.

[0014] Preferably, the temperature detection module uses a temperature sensor, which is installed at the forklift control module, battery module, hydraulic module and drive module, and is connected to the cooling control module.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention detects the working temperature of the forklift control module, battery module, hydraulic module and drive module through temperature detection, so as to transmit the temperature information to the cooling control module, and then control the cooling module to cool down the corresponding working module; 2. When the temperature rises at each working module, the present invention starts the air cooling component in the cooling module to perform air cooling. When the temperature is high and the conventional air cooling cannot meet the heat dissipation requirements, the cooling component and the heat exchange structure 1 cool the airflow in the air cooling component to increase the air cooling effect. 3. When the temperature of each working module is too high, the present invention starts the water cooling component to cool the forklift control module, battery module, hydraulic module and drive module with cooling water to ensure the cooling effect; 4. The present invention transports cooling water in the water cooling component to the second heat exchange structure to perform heat exchange and cooling treatment with the oil, thereby making full use of the water cooling component and improving the cooling effect on the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the control structure of the cooling system according to an embodiment of the present invention; Figure 2 is a schematic diagram of a cooling module according to an embodiment of the present invention; Figure 3 A schematic diagram of a heat exchange structure according to an embodiment of the present invention; Figure 4 for Figure 3 Schematic diagram of the structure of part A shown in FIG.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 100, forklift control module; 101, battery module; 102, hydraulic module; 103, drive module; 200, cooling control module; 201, temperature detection module; 300, cooling module; 301, cooler; 302, water pump; 303, cooling water tank; 304, filter; 305, heat dissipation cooling fan; 400, heat exchange structure 1; 401, heat exchange structure 2; 402, heat exchange straight pipe; 403, spiral heat exchange fin; 404, connecting elbow; 405, cooling water inlet pipe; 406, cooling water outlet pipe; 500, outer sleeve; 501, input pipe; 502, output pipe; 503, connecting pipe. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Embodiment 1

[0021] Please refer to the attached Figure 1 , the present invention provides a technical solution: A novel cooling system for an electric counterbalanced forklift, comprising: The forklift control module 100 receives various working information and status information of the forklift and issues control information to control various working and movement of the forklift; The battery module 101 is connected to the forklift control module 100 to provide power for the electric control structure of the forklift; The hydraulic module 102 is connected to the forklift control module 100 and provides hydraulic driving force for the hydraulic execution structure of the forklift, including a hydraulic oil tank, hydraulic pipelines and hydraulic cylinders; The driving module 103 is connected to the forklift control module 100 and is used to drive the motion execution structure of the forklift to perform corresponding operations; The cooling control module 200 is connected to the forklift control module 100 and is used to receive temperature information at the forklift control module 100, the battery module 101, the hydraulic module 102 and the drive module 103, and send control information for feedback processing; The temperature detection module 201 is connected to the cooling control module 200 and is used to detect the working environment temperature of the forklift control module 100, the battery module 101, the hydraulic module 102 and the drive module 103; The cooling module 300 is connected to the cooling control module 200 and is used to cool the forklift control module 100, the battery module 101, the hydraulic module 102 and the drive module 103, and includes a water cooling component, an air cooling component and an oil cooling component; A heat exchange structure 1 400 is provided in the water cooling component, a heat exchange structure 2 401 is provided in the oil cooling component, and both the heat exchange structure 1 400 and the heat exchange structure 2 401 are connected to the water cooling component.

[0022] When the temperature detection module 201 detects that the forklift control module 100, the battery module 101, the hydraulic module 102 and the drive module 103 have increased temperatures, the cooling control module 200 starts the air cooling component in the cooling module 300 to perform air cooling and heat dissipation processing on each module.

[0023] When the temperature detection module 201 detects that the forklift control module 100, the battery module 101, the hydraulic module 102 and the drive module 103 have high temperatures, conventional air cooling cannot meet the heat dissipation needs. The cooling water in the cooling component is transported to the heat exchange structure 400 to exchange heat and cool the air flow in the air cooling component to increase the air cooling effect.

[0024] When the temperature detection module 201 detects that the temperature of the forklift control module 100, the battery module 101, the hydraulic module 102 and the drive module 103 is too high, the water cooling component is started to cool the forklift control module 100, the battery module 101, the hydraulic module 102 and the drive module 103 with cooling water to ensure the cooling effect.

[0025] The forklift control module 100 , the battery module 101 , the hydraulic module 102 and the drive module 103 have different temperatures. According to the different temperatures, appropriate cooling and heat dissipation methods are flexibly selected for different modules.

[0026] When cooling the oil, the cooling water in the water cooling assembly is transported to the heat exchange structure 2 401 to perform heat exchange and cooling treatment with the oil, thereby making full use of the water cooling assembly and improving the cooling effect on the oil.

[0027] Among them, the water cooling component includes a cooler 301, a water pump 302 and a cooling water tank 303 which are connected in sequence by pipes, the cooler 301 is connected to a cooling water input pipe, the cooling water tank 303 is connected to a cooling water output pipe, and a plurality of branches are provided at one end of the cooling water output pipe away from the cooling water tank 303, two of which are respectively connected to the heat exchange structure 1 400 and the heat exchange structure 2 401, and the remaining branches are connected to the cooling structures at the forklift control module 100, the battery module 101, the hydraulic module 102 and the drive module 103.

[0028] The cooling water passes through each working module for water cooling, and enters the cooler 301 for cooling through the cooling water input pipe, and then returns to the cooling water tank 303 through the water pump 302. When the oil and airflow need to be cooled, they enter the heat exchange structure 1 400 and the heat exchange structure 2 401 through the corresponding branch pipes for cooling and return to the cooling water input pipe through the pipe.

[0029] Among them, the cooling water output pipe of the cooling water tank 303 is connected to the filter 304. The cooling water output from the cooling water tank 303 is filtered and then transported to the heat exchange structure or the cooling structure at other working modules to avoid blockage of the heat exchange structure or the cooling structure.

[0030] The temperature detection module 201 uses a temperature sensor, which is installed at the forklift control module 100 , the battery module 101 , the hydraulic module 102 and the drive module 103 , and is connected to the cooling control module 200 .

[0031] Embodiment 2

[0032] Combination Figure 2 As shown, the structure of this embodiment is basically the same as that of embodiment 1, except that the air cooling component includes a heat dissipation cooling fan 305 and an air supply duct, a heat exchange structure 400 is arranged on the air supply duct, and the air supply duct is provided with a plurality of exhaust ducts at one end away from the heat dissipation cooling fan 305 and the heat exchange structure 400, and the air outlet end of the exhaust duct is arranged at the forklift control module 100, the battery module 101, the hydraulic module 102 and the drive module 103, the heat dissipation cooling fan 305 supplies air to the air supply duct and the plurality of exhaust ducts, and discharges the air to the corresponding modules through the exhaust duct for air cooling treatment, and when it is necessary to improve the cooling effect, the cooling component transports cooling water to the heat exchange structure 400, exchanges heat with the airflow in the air supply duct, and cools it down to improve the cooling effect after the cold air is discharged.

[0033] The oil cooling component includes an oil cooling pipeline, the heat exchange structure 2 401 is located on the oil cooling pipeline, and both ends of the oil cooling pipeline are connected to the hydraulic oil tank of the hydraulic module 102 and are connected to a pump body. When the oil needs to be cooled, the hydraulic oil is transported to the oil cooling pipeline through the pump body, and after heat exchange and cooling treatment by the heat exchange structure 2 401, it returns to the hydraulic oil tank.

[0034] Embodiment 3 Combination Figure 3 , Figure 4As shown, the structure of this embodiment is basically the same as that of embodiment 2, except that the structures of heat exchange structure 1 400 and heat exchange structure 2 401 are the same, and include a plurality of heat exchange straight tubes 402 arranged evenly and in parallel, the plurality of heat exchange straight tubes 402 are connected end to end in sequence, and the connecting ends of two adjacent heat exchange straight tubes 402 are connected by a connecting elbow 404, one end of one of the heat exchange straight tubes 402 located at the outer position is connected to a cooling water inlet pipe 405, and the other end of the heat exchange straight tube 402 located at the outer position is connected to a cooling water outlet pipe 406, and the cooling water inlet pipe 405 is connected to the cooling water output pipe, and the cooling water outlet pipe 406 is connected to the cooling water input pipe.

[0035] A spiral heat exchange fin 403 is provided on the outer wall of the straight heat exchange tube 402, and an outer sleeve 500 is fixedly sleeved corresponding to the position of the spiral heat exchange fin 403. Multiple outer sleeves 500 are connected end to end in sequence, and the connecting ends of two adjacent outer sleeves 500 are connected by a connecting pipe 503. One end of the outer sleeve 500 located at the outer position is connected to the input pipe 501, and one end of the other outer sleeve 500 located at the outer position is connected to the output pipe 502.

[0036] The air supply duct and the oil cooling duct are set as a disconnected structure at the heat exchange structure 400, and the two ends are respectively connected to the input pipe 501 and the output pipe 502, so that the airflow and the oil can enter the corresponding multiple outer casings 500. When the cooling water passes through the heat exchange straight tube 402, it fully contacts with the airflow and the oil through the side wall of the heat exchange straight tube 402 and the spiral heat exchange fins 403, thereby achieving a cooling effect, and the heat exchange surface is increased by the spiral heat exchange fins 403, thereby increasing the movement path of the airflow and the oil, and improving the heat exchange effect.

[0037] Embodiment 4 The structure of this embodiment is basically the same as that of the second embodiment, except that the heat dissipation cooling fan 305 is connected to two air supply ducts, one of which is connected to the heat exchange structure 400, and the other is connected to a plurality of exhaust ducts, and valves are arranged on the two air supply ducts. When the heat exchange structure 400 is not used to cool the airflow in the air supply duct, the valve of the air supply duct at the heat exchange structure can be closed, and the valve of the other air supply duct can be opened to directly supply air to the plurality of exhaust ducts for cooling, thereby reducing the air supply path and being able to switch between different paths in the working state, thereby improving the flexibility of application.

[0038] Embodiment 5

[0039] The structure of this embodiment is basically the same as that of the second embodiment, except that a temperature sensor is provided at the heat dissipation cooling fan 305, and the temperature sensor is connected to the cooling control module 200, and is used to detect the air flow temperature at the heat dissipation cooling fan 305, and when the air flow temperature is too high, the heat exchange structure 400 can be started, and the air flow passing through the heat exchange structure 400 can be cooled by the cooling component and other structures.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A new cooling system for an electric counterbalanced forklift, characterized in that: include: A forklift control module (100) receives various operation information and status information of the forklift and issues control information to control various operations and movements of the forklift; A battery module (101) is connected to the forklift control module (100) to provide power for the electric control structure of the forklift; A hydraulic module (102), connected to the forklift control module (100), provides hydraulic driving force for the hydraulic execution structure of the forklift, and comprises a hydraulic oil tank, hydraulic pipelines and a hydraulic oil cylinder; A driving module (103) connected to the forklift control module (100) and used to drive the motion execution structure of the forklift to perform corresponding operations; A cooling control module (200) is connected to the forklift control module (100) and is used to receive temperature information at the forklift control module (100), the battery module (101), the hydraulic module (102) and the drive module (103), and to send control information for feedback processing; A temperature detection module (201) connected to the cooling control module (200) and used to detect the working environment temperature of the forklift control module (100), the battery module (101), the hydraulic module (102) and the drive module (103); A cooling module (300) is connected to the cooling control module (200) and is used to cool the forklift control module (100), the battery module (101), the hydraulic module (102) and the drive module (103), and comprises a water cooling component, an air cooling component and an oil cooling component; The water cooling component is provided with a heat exchange structure 1 (400), the oil cooling component is provided with a heat exchange structure 2 (401), and both the heat exchange structure 1 (400) and the heat exchange structure 2 (401) are connected to the water cooling component.

2. The novel cooling system for electric counterbalanced forklift according to claim 1 is characterized in that: The water cooling assembly comprises a cooler (301), a water pump (302) and a cooling water tank (303) which are connected in sequence through pipes, the cooler (301) is connected to a cooling water input pipe, the cooling water tank (303) is connected to a cooling water output pipe, and a plurality of branch pipes are provided at one end of the cooling water output pipe away from the cooling water tank (303), two of which are respectively connected to heat exchange structure one (400) and heat exchange structure two (401), and the remaining branch pipes are connected to cooling structures at a forklift control module (100), a battery module (101), a hydraulic module (102) and a drive module (103).

3. The novel cooling system for electric counterbalanced forklift according to claim 2 is characterized in that: The cooling water output pipe of the cooling water tank (303) is connected to a filter (304).

4. The novel cooling system for electric counterbalanced forklift according to claim 2 is characterized in that: The air cooling component comprises a heat dissipation cooling fan (305) and an air supply duct, a heat exchange structure (400) is arranged on the air supply duct, and the air supply duct is provided with a plurality of exhaust ducts at one end away from the heat dissipation cooling fan (305) and the heat exchange structure (400), and the air outlet ends of the exhaust ducts are arranged at the forklift control module (100), the battery module (101), the hydraulic module (102) and the drive module (103).

5. The novel cooling system for electric counterbalanced forklift according to claim 4 is characterized in that: The oil cooling component comprises an oil cooling pipeline, the second heat exchange structure (401) is located on the oil cooling pipeline, and both ends of the oil cooling pipeline are connected to the hydraulic oil tank of the hydraulic module (102) and are connected to a pump body.

6. The novel cooling system for electric counterbalanced forklift according to claim 5 is characterized in that: The heat exchange structure 1 (400) and the heat exchange structure 2 (401) have the same structure and include a plurality of heat exchange straight tubes (402) arranged evenly and in parallel. The plurality of heat exchange straight tubes (402) are connected end to end in sequence, and the connecting ends of two adjacent heat exchange straight tubes (402) are connected via a connecting elbow (404). One end of one of the heat exchange straight tubes (402) located at the outer position is connected to a cooling water inlet pipe (405), and one end of the other heat exchange straight tube (402) located at the outer position is connected to a cooling water outlet pipe (406), and the cooling water inlet pipe (405) is connected to the cooling water outlet pipe. , a cooling water outlet pipe (406) is connected to a cooling water input pipe; a spiral heat exchange fin (403) is provided on the outer wall of the heat exchange straight pipe (402), and an outer sleeve (500) is fixedly sleeved corresponding to the position of the spiral heat exchange fin (403); a plurality of outer sleeves (500) are connected end to end in sequence, and the connecting ends of two adjacent outer sleeves (500) are connected via a connecting pipe (503); one end of one outer sleeve (500) located at an outer position is connected to an input pipe (501), and one end of another outer sleeve (500) located at an outer position is connected to an output pipe (502).

7. The novel cooling system for electric counterbalanced forklift according to claim 4 is characterized in that: The heat dissipation cooling fan (305) is connected to two air supply ducts, one of which is connected to the heat exchange structure 1 (400) and the other is connected to a plurality of exhaust ducts, and valves are provided on the two air supply ducts.

8. The novel cooling system for electric counterbalanced forklift according to claim 4 is characterized in that: The heat dissipation cooling fan (305) is provided with a temperature sensor, and the temperature sensor is connected to the cooling control module (200).

9. The novel cooling system for electric counterbalanced forklift according to any one of claims 1 to 8, characterized in that: The temperature detection module (201) uses a temperature sensor, is installed at the forklift control module (100), the battery module (101), the hydraulic module (102) and the drive module (103), and is connected to the cooling control module (200).

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