A heat dissipation structure, control system, control method and excavator

Abstract

The application discloses a heat dissipation structure, a control system, a control method and an excavator, which comprise a door plate, a radiator, a first fan and a second fan; a plurality of air holes are arranged on the door plate, and the door plate is installed on a machine shed; the radiator is arranged in the machine shed and is protected by the door plate; the first fan is arranged in a wind shield, and the door plate, the radiator and the first fan are arranged side by side; the first fan rotates to form a pressure difference between the inner surface and the outer surface of the radiator, and the flowing air current carries away the heat of the radiator; the second fan is installed at the position of the door plate relative to the radiator, and the second fan rotates to further carry away the heat of the radiator. The application provides a heat dissipation structure, a control system, a control method and an excavator, in a high ambient temperature, the allowed air inlet volume of the door plate is increased, the air inlet resistance is reduced, the heat dissipation efficiency of the existing radiator of the excavator is improved, and the use requirement of the excavator is met.

Description

Technical Field

[0001] This invention relates to a heat dissipation structure, control system, control method, and excavator, which are used to improve the efficiency and environmental adaptability of the heat dissipation system and belong to the field of engineering machinery. Background Technology

[0002] The current method of heat dissipation for excavators is to use a fan to create a pressure difference between the two sides of the radiator, and then transfer the heat from the radiator to the environment through airflow. The door panel, the machine compartment, and the radiator together form the radiator compartment. The fan rotates inside the wind deflector, creating a pressure difference between the inside and outside of the radiator. The airflow within the radiator compartment and the wind deflector carries away the heat from the radiator, thus achieving the purpose of heat dissipation.

[0003] Once the design of a cooling system is finalized, its heat dissipation capacity is fixed. Taking the most widely used intake fan as an example, the outer panel of the radiator serves to protect it, and the openings in the panel allow air to flow into the radiator from the external environment. The larger the area of ​​the openings on the panel, the lower the air resistance to the radiator and the greater the airflow allowed through the radiator, but the weaker the protective capability of the panel itself. The opening area of ​​the panel has a limit. When the entire machine is used in excessively high ambient temperatures, insufficient heat dissipation and overheating of the radiator will occur. Generally, the only solution to this problem is to replace the radiator with a larger one and a larger fan, which increases the cost of the entire radiator compartment. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a heat dissipation structure, control system, control method, and excavator. Under high ambient temperatures, it increases the allowable air intake volume of the door panel, reduces air intake resistance, and improves the heat dissipation efficiency of existing excavator radiators to meet the requirements of excavator use.

[0005] This invention is implemented according to the following technical solution:

[0006] In a first aspect, the present invention provides a heat dissipation structure, mainly used in excavators, comprising:

[0007] A door panel with multiple ventilation holes is installed on the machine shed.

[0008] The radiator is installed in the machine room and protected by the door panel;

[0009] The first fan is arranged in the windshield. The door panel, the radiator and the first fan are arranged side by side. The rotating first fan creates a pressure difference between the inside and outside of the radiator, and the flowing air carries away the heat of the radiator.

[0010] A second fan is installed on the door panel at a position relative to the radiator, and the rotating second fan further removes heat from the radiator.

[0011] In some embodiments, a ventilation mesh is provided in the central region of the door panel, and the second fan is arranged in the upper and / or lower regions of the door panel.

[0012] In some embodiments, the radiator includes a hydraulic oil radiator, an intercooler radiator, and a water radiator; the second fan includes a hydraulic oil radiator fan, an intercooler radiator fan, and a water radiator fan; at least one hydraulic oil radiator fan is mounted on the door panel at a position relative to the hydraulic oil radiator; at least one intercooler radiator fan is mounted on the door panel at a position relative to the intercooler radiator; and at least one water radiator fan is mounted on the door panel at a position relative to the water radiator.

[0013] In some embodiments, the door panel is equipped with two hydraulic oil radiator fans with multiple adjustable speeds at a position relative to the hydraulic oil radiator; the door panel is equipped with two intercooler radiator fans with multiple adjustable speeds at a position relative to the intercooler radiator; and the door panel is equipped with two water radiator fans with multiple adjustable speeds at a position relative to the water radiator.

[0014] Secondly, the present invention provides a heat dissipation control system, comprising:

[0015] The above-mentioned heat dissipation structure;

[0016] A temperature sensor, installed on the radiator, is used to detect the radiator temperature;

[0017] A speed sensor, mounted on the engine, is used to detect engine speed;

[0018] The controller has its input terminal electrically connected to the temperature sensor and speed sensor, and its output terminal electrically connected to the second fan. The controller controls the start and stop of the second fan by receiving the radiator temperature and engine speed.

[0019] Thirdly, the present invention provides an excavator, characterized in that:

[0020] Includes the aforementioned heat dissipation structure; or includes the aforementioned heat dissipation control system.

[0021] Fourthly, the present invention provides a heat dissipation control method based on the above-described heat dissipation control system:

[0022] After the excavator is started, the radiator temperature gradually rises. The first fan rotates inside the windshield, creating a negative pressure in the cavity between the radiator and the windshield. Outside air enters the door panel through the vents and then enters the fin gaps in the radiator, carrying away the heat from the radiator.

[0023] When the engine speed is greater than N rpm, the controller reads the radiator temperature. If the temperature is less than or equal to the set temperature I, the second fan does not work; if the temperature is greater than the set temperature I but less than or equal to the set temperature II, one second fan needs to work; if the temperature is greater than or equal to the set temperature II, multiple second fans need to work.

[0024] The second fan stops working when the engine speed is less than or equal to N rpm.

[0025] In some embodiments, the radiator includes a hydraulic oil radiator, an intercooler radiator, and a water radiator, and the second fan includes a hydraulic oil radiator fan, an intercooler radiator fan, and a water radiator fan.

[0026] When the engine speed is greater than N rpm, the controller will read the hydraulic oil cooler temperature. When the temperature is less than or equal to the set temperature a, the hydraulic oil cooler fan will not work; when the temperature is greater than the set temperature a and less than or equal to the set temperature b, one hydraulic oil cooler fan needs to work; when the temperature is greater than or equal to the set temperature b, multiple hydraulic oil cooler fans need to work.

[0027] The controller reads the intercooler radiator temperature. When the temperature is less than or equal to the set temperature c, the intercooler radiator fan does not work. When the temperature is greater than the set temperature c but less than or equal to the set temperature d, one intercooler radiator fan needs to work. When the temperature is greater than or equal to the set temperature d, multiple intercooler radiator fans need to work.

[0028] The controller reads the water radiator temperature. When the temperature is less than or equal to the set temperature e, the water radiator fan does not work; when the temperature is greater than the set temperature e but less than or equal to the set temperature f, one water radiator fan needs to work; when the temperature is greater than or equal to the set temperature f, multiple water radiator fans need to work.

[0029] In some embodiments, the second fan has multiple speed settings, and the controller selects different speed settings according to the radiator temperature to control the fan speed.

[0030] In some embodiments, the first fan has multiple speed settings, and different speed settings are selected to control the fan speed, thereby adjusting the flow rate of outside air entering the door panel through the vent.

[0031] Beneficial effects of this invention:

[0032] Improve the excavator's adaptability to high-temperature environments, especially when the environment exceeds the design temperature of the cooling system;

[0033] When excavators on the market experience overheating of the radiator, a door panel with a fan can be used to solve the problem, avoiding the long, difficult, and expensive solution of replacing the radiator or fan. Attached Figure Description

[0034] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0035] In the attached diagram:

[0036] Figure 1 This is a schematic diagram of the heat dissipation structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the heat dissipation control method of the present invention.

[0038] Attached diagram labels: 101 Ventilation mesh, 102 Door panel, 103 Hydraulic oil radiator fan I, 104 Intercooler radiator fan I, 105 Water radiator fan I, 106 Hydraulic oil radiator fan II, 107 Intercooler radiator fan II, 108 Water radiator fan II, 201 Hydraulic oil radiator, 202 Intercooler radiator, 203 Water radiator, 301 Radiator main fan, 302 Wind deflector.

[0039] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] like Figure 1 As shown, a heat dissipation structure, mainly used on excavators, includes a door panel 102, a radiator, a first fan, and a second fan. The door panel 102 has multiple ventilation holes and is installed on the machine shed. The radiator is arranged in the machine shed and protected by the door panel 102. The first fan (i.e., the main radiator fan 301 in the figure) is arranged in the wind shield 302. The door panel 102, the radiator, and the first fan (i.e., the main radiator fan 301 in the figure) are arranged side by side. The rotating main radiator fan 301 creates a pressure difference between the inside and outside of the radiator, and the flowing air carries away the heat from the radiator. The second fan is installed on the door panel 102 at a position relative to the radiator, and the rotating second fan further carries away the heat from the radiator.

[0044] In a further embodiment, a ventilation mesh 101 is provided in the middle area of ​​the door panel 102, and a second fan is arranged in the upper and / or lower areas of the door panel 102.

[0045] In a further embodiment, the radiator includes a hydraulic oil radiator 201, an intercooler radiator 202, and a water radiator 203; the second fan includes a hydraulic oil radiator fan, an intercooler radiator fan, and a water radiator fan; at least one hydraulic oil radiator fan is installed on the door panel 102 at a position relative to the hydraulic oil radiator 201; at least one intercooler radiator fan is installed on the door panel 102 at a position relative to the intercooler radiator 202; and at least one water radiator fan is installed on the door panel 102 at a position relative to the water radiator 203.

[0046] In a preferred embodiment, the door panel 102 is equipped with two hydraulic oil radiator fans 103 and 106 with multiple adjustable speeds at a position relative to the hydraulic oil radiator 201; one hydraulic oil radiator fan II 106 is arranged in the upper region of the door panel 102, and the other hydraulic oil radiator fan I 103 is arranged in the lower region of the door panel 102.

[0047] In a preferred embodiment, the door panel 102 is equipped with two intercooler radiator fans 104 and 107 with multiple adjustable speeds at a position relative to the intercooler radiator 202; one intercooler radiator fan II 107 is arranged in the upper region of the door panel 102, and the other intercooler radiator fan I 104 is arranged in the lower region of the door panel 102.

[0048] In a preferred embodiment, the door panel 102 is equipped with two water radiator fans 105 and 108 with multiple adjustable speeds at a position relative to the water radiator 203; one water radiator fan II 108 is arranged in the upper area of ​​the door panel 102, and the other water radiator fan I 105 is arranged in the lower area of ​​the door panel 102.

[0049] The present invention also provides a heat dissipation control system, including the above-mentioned heat dissipation structure, temperature sensor, speed sensor and controller; the temperature sensor is installed on the radiator for detecting the radiator temperature; the speed sensor is installed on the engine for detecting the engine speed; the input terminal of the controller is electrically connected to the temperature sensor and the speed sensor, and the output terminal is electrically connected to the second fan, and the controller controls the start and stop of the second fan by receiving the radiator temperature and the engine speed.

[0050] The present invention also provides a heat dissipation control method based on the above-described heat dissipation control system.

[0051] Taking the suction fan structure as an example, the overall implementation process is as follows:

[0052] After the excavator is started, the temperatures of the hydraulic oil radiator 201, intercooler radiator 202, and water radiator 203 gradually increase. The main radiator fan 301 rotates inside the windshield 302, creating a negative pressure between the hydraulic oil radiator 201, intercooler radiator 202, and water radiator 203 and the cavity of the windshield 302. The pressure of the ambient air outside the vehicle is higher than the pressure behind the radiator. The ambient air enters the radiator compartment through the vent mesh 101, and then enters the fin gaps of the hydraulic oil radiator 201, intercooler radiator 202, and water radiator 203, carrying away the heat from the fins. As the heat dissipates, the temperatures of the hydraulic oil radiator 201, intercooler radiator 202, and water radiator 203 drop to a stable state.

[0053] Hydraulic oil radiator 201, intercooler radiator 202, and water radiator 203 each have built-in temperature sensors. When the engine speed is greater than N rpm, the controller reads the temperature of hydraulic oil radiator 201. If the temperature is less than or equal to the set temperature a, hydraulic oil radiator fan I 103 and hydraulic oil radiator fan II 106 do not work. If the temperature is greater than the set temperature a and less than or equal to the set temperature b, hydraulic oil radiator fan I 103 works and hydraulic oil radiator fan II 106 does not work. If the temperature is greater than or equal to the set temperature b, hydraulic oil radiator fan I 103 works and hydraulic oil radiator fan II 106 works.

[0054] The controller reads the temperature of the intercooler radiator 202. When the temperature is less than or equal to the set temperature c, the intercooler radiator fan I 104 and the intercooler radiator fan II 107 do not work. When the temperature is greater than the set temperature c and less than or equal to the set temperature d, the intercooler radiator fan I 104 works and the intercooler radiator fan II 107 does not work. When the temperature is greater than or equal to the set temperature d, the intercooler radiator fan I 104 works and the intercooler radiator fan II 107 works.

[0055] The controller reads the temperature of the water radiator 203. When the temperature is less than or equal to the set temperature e, the water radiator fan I 105 and the water radiator fan II 108 will not work. When the temperature is greater than the set temperature e and less than or equal to the set temperature d, the water radiator fan I 105 will work and the water radiator fan II 108 will not work. When the temperature is greater than or equal to the set temperature d, the water radiator fan I 105 and the water radiator fan II 108 will work.

[0056] When the engine speed is less than or equal to N rpm, the hydraulic oil radiator fans 103 and 106, the intercooler radiator fans 14 and 107, and the water radiator fans 105 and 108 stop working.

[0057] The process of implementing a blower-type radiator is similar to this one, except that the fan direction is adjusted.

[0058] In a further embodiment, hydraulic oil radiator fans 103 and 106, intercooler radiator fans 14 and 107, and water radiator fans 105 and 108 are equipped with multiple speed settings, and the controller selects different speed settings according to the radiator temperature to control the fan speed.

[0059] A further solution is to provide the radiator's main fan 301 with multiple speed settings, allowing users to select different speed settings to control the fan speed and thus adjust the flow rate of outside air entering the door panel through the vents.

[0060] In summary, the present invention provides a heat dissipation control method with the following functions and advantages:

[0061] a. By adding a fan to the door panel, the airflow into the radiator is increased, and the overall pressure in the radiator compartment is increased, which can improve the overall heat dissipation efficiency of the radiator.

[0062] b. Placing the fan around the heatsink can solve the problem of low heat dissipation efficiency around the heatsink.

[0063] c. When a vehicle experiences a problem with its radiator overheating, the radiator's capacity can be improved by replacing the door panel with one equipped with a fan. This is a simple, convenient, and inexpensive solution.

[0064] d. By controlling the fan speed through the controller, the fan speed can be accurately selected according to the actual temperature of the heat sink, thus avoiding energy waste.

[0065] e. Use a door panel fan to increase the airflow to a specific area of ​​the radiator, precisely increasing the heat dissipation at that location and thus improving the radiator's heat exchange efficiency.

[0066] f. Using a door panel fan to increase the pressure in the radiator compartment can reduce the amount of hot air recirculation.

[0067] The excavator provided by the present invention is described below. The excavator described below and the heat dissipation control system described above can be referred to in correspondence.

[0068] The present invention provides an excavator that may include a heat dissipation control system as described in any of the above embodiments.

[0069] The beneficial effects achieved by the excavator provided by this invention are consistent with the beneficial effects achieved by the heat dissipation control system provided by this invention, so they will not be repeated here.

[0070] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0071] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A heat dissipation structure, applied in an excavator, characterized in that, include: A door panel with multiple ventilation holes is installed on the machine shed. The radiator is installed in the machine room and protected by the door panel; The first fan is arranged in the windshield. The door panel, the radiator and the first fan are arranged side by side. The rotating first fan creates a pressure difference between the inside and outside of the radiator, and the flowing air carries away the heat of the radiator. A second fan is installed on the door panel at a position relative to the radiator, and the rotating second fan further removes the heat from the radiator. The radiator includes a hydraulic oil radiator, an intercooler radiator, and a water radiator, and the second fan includes a hydraulic oil radiator fan, an intercooler radiator fan, and a water radiator fan. The door panel is equipped with two hydraulic oil cooler fans with multiple adjustable speeds at a position relative to the hydraulic oil cooler. The door panel has two intercooler radiator fans with multiple adjustable speeds installed at the position relative to the intercooler radiator. The door panel has two water radiator fans with multiple adjustable speeds installed at the position relative to the water radiator.

2. The heat dissipation structure according to claim 1, characterized in that: The door panel has a ventilation mesh in the middle area, and the second fan is arranged in the upper and / or lower area of ​​the door panel.

3. A heat dissipation control system, characterized in that, include: The heat dissipation structure as described in claim 1 or 2; A temperature sensor, installed on the radiator, is used to detect the radiator temperature; A speed sensor, mounted on the engine, is used to detect engine speed; The controller has its input terminal electrically connected to the temperature sensor and speed sensor, and its output terminal electrically connected to the second fan. The controller controls the start and stop of the second fan by receiving the radiator temperature and engine speed.

4. An excavator, characterized in that: It includes the heat dissipation structure as described in claim 1 or 2; or, it includes the heat dissipation control system as described in claim 3.

5. A heat dissipation control method based on the heat dissipation control system of claim 3, characterized in that: After the excavator is started, the radiator temperature gradually rises. The first fan rotates inside the windshield, creating a negative pressure in the cavity between the radiator and the windshield. Outside air enters the door panel through the vents and then enters the fin gaps in the radiator, carrying away the heat from the radiator. When the engine speed is greater than N rpm, the controller reads the radiator temperature. If the temperature is less than or equal to the set temperature I, the second fan does not work; if the temperature is greater than the set temperature I but less than or equal to the set temperature II, one second fan needs to work; if the temperature is greater than or equal to the set temperature II, multiple second fans need to work. The second fan stops working when the engine speed is less than or equal to N rpm.

6. The heat dissipation control method according to claim 5, characterized in that: The radiator includes a hydraulic oil radiator, an intercooler radiator, and a water radiator; the second fan includes a hydraulic oil radiator fan, an intercooler radiator fan, and a water radiator fan. When the engine speed is greater than N rpm, the controller will read the hydraulic oil cooler temperature. When the temperature is less than or equal to the set temperature a, the hydraulic oil cooler fan will not work; when the temperature is greater than the set temperature a and less than or equal to the set temperature b, one hydraulic oil cooler fan needs to work; when the temperature is greater than or equal to the set temperature b, multiple hydraulic oil cooler fans need to work. The controller reads the intercooler radiator temperature. When the temperature is less than or equal to the set temperature c, the intercooler radiator fan does not work. When the temperature is greater than the set temperature c but less than or equal to the set temperature d, one intercooler radiator fan needs to work. When the temperature is greater than or equal to the set temperature d, multiple intercooler radiator fans need to work. The controller reads the water radiator temperature. When the temperature is less than or equal to the set temperature e, the water radiator fan does not work; when the temperature is greater than the set temperature e but less than or equal to the set temperature f, one water radiator fan needs to work; when the temperature is greater than or equal to the set temperature f, multiple water radiator fans need to work.

7. The heat dissipation control method according to claim 5, characterized in that: The second fan has multiple speed settings, and the controller selects different speed settings according to the heatsink temperature to control the fan speed.

8. The heat dissipation control method according to claim 5, characterized in that: The first fan has multiple speed settings. Different speed settings can be selected to control the fan speed, thereby adjusting the flow rate of outside air into the door panel through the ventilation holes.

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