Heating system for a work machine and work machine having the same

Abstract

The utility model relates to a kind of heating system for working machine, and the working machine includes cab, the engine cabin of accommodating engine, radiator for cooling engine and the cooling fan of forcing cooling airflow to pass through the radiator, the engine cabin is communicated with the air outlet surface side of radiator via its side opening, characterized by, the heating system includes: hood, the hood is communicated with engine cabin inner space, electronic fan is provided in the hood to suck the hot airflow in engine cabin into hood;Hot air duct for guiding the hot airflow collected in hood to cab;And the purification device in the hot air duct, the purification device is configured to purify the hot airflow from hood.The utility model also relates to the working machine with the heating system.

Description

Technical Field

[0001] This utility model relates to the field of thermal management technology for operating machinery, and in particular to a cab heating system for operating machinery and operating machinery including the cab heating system. Background Technology

[0002] In operating machinery, especially wide-body vehicles, the temperature inside the cab is extremely low when the winter temperature drops (for example, the winter temperature in northern mines can reach minus 30 degrees Celsius). The cab has poor insulation, and the onboard heater and air conditioner have low power and cannot raise the temperature inside the cab in time. The driver has to endure the cold temperature to drive and work.

[0003] Existing wide-body vehicles typically use PTC heating or air conditioning for heating. The air conditioning heating system also utilizes hot water from the engine's water jacket as a heat source. The cooled hot water flows back to the engine's water jacket, requiring some diesel fuel to reheat it to a suitable temperature. Therefore, air conditioning heating actually comes at the cost of increased fuel consumption, reducing the overall energy efficiency of the vehicle. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the above-mentioned problems and / or other problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides a heating system for machinery, which enables the recovery and utilization of some of the heat that would otherwise be wasted, thereby improving the overall energy efficiency and enhancing comfort.

[0006] According to one aspect of the present invention, a cooling system for a work machine is provided, the work machine including a cab, an engine compartment housing an engine, a radiator for cooling the engine, and a cooling fan for forcing cooling airflow through the radiator, the engine compartment communicating with the air outlet side of the radiator via a side opening therein, characterized in that the heating system includes:

[0007] The hood is connected to the interior space of the engine compartment. An electric fan is installed inside the hood to draw hot air from the engine compartment into the hood.

[0008] Hot air ducts used to guide the hot air collected in the vent hood to the driver's cab; and

[0009] A purification device is installed in the hot air duct, which is configured to purify the hot air flow from the gas collection hood.

[0010] According to this invention, a hood is used to collect hot air from the engine compartment, while simultaneously purifying and filtering this hot air before delivering the clean hot air to the cab for heating. The cab temperature rises rapidly, meeting comfort requirements. The overall energy efficiency of the machine is significantly improved.

[0011] According to one embodiment of this invention, the air intake shroud is located in the upper part of the engine compartment. This fully utilizes the upward flow of hot air, thereby reducing the power consumption of the electric fan.

[0012] According to one embodiment of this utility model, the air intake shroud is arranged in an area within the engine compartment away from the side opening. Therefore, the airflow also has a cooling effect on the engine as it flows around the engine. Thus, the airflow is utilized to remove heat from the engine compartment as much as possible, thereby further cooling the engine.

[0013] According to one embodiment of this utility model, the air intake shroud has a conical or truncated conical longitudinal section, with its large-diameter opening facing the interior of the engine compartment. The conical air intake shroud can remove large dust particles entrained in the airflow, reducing thermal aerodynamic losses. Furthermore, combined with the suction effect of the electric fan, it can accelerate the delivery of hot airflow to the cab.

[0014] According to one embodiment of the present invention, the cooling fan is driven by the engine and arranged inside the engine compartment. This configuration facilitates faster flow of hot air from the radiator into the engine compartment across the engine periphery, enhancing convective heat transfer and removing more heat dissipated from the engine itself.

[0015] According to one embodiment of this utility model, the electronic control device of the heating system includes an instrument panel, an ambient temperature sensor, and a driver's cabin temperature sensor. The instrument panel, ambient temperature sensor, and driver's cabin temperature sensor are all electrically connected to the control circuit of the electronic control device. The control circuit of the electronic control device is also electrically connected to the electronic fan. The instrument panel is provided with an operating section for triggering an automatic heating mode. The electronic control device is configured to control the opening and closing of the electronic fan based on the ambient temperature signal output by the ambient temperature sensor and / or the driver's cabin temperature signal output by the driver's cabin temperature sensor when the automatic heating mode is triggered. This enhances the intelligent control of the entire machine and improves the ease of operation.

[0016] According to one embodiment of this utility model, the electronic control device includes a manual switch. The manual switch and the control circuit of the electronic control device form a first control loop, and the instrument panel and the control circuit of the electronic control device form a second control loop. Both the first and second control loops are electrically connected to the electronic fan. The manual switch has an operating terminal for triggering a manual heating mode. The electronic control device is configured such that when the manual heating mode is triggered, the first control loop is directly turned on or off to control the opening and closing of the electronic fan, and the on or off state of the first control loop takes precedence over the on or off state of the second control loop. Therefore, based on individual differences in perceived temperature, the electronic fan can be turned on or off independently, meeting personalized comfort requirements.

[0017] According to one embodiment of this utility model, the purification device includes a coarse filter section and a fine filter section arranged sequentially along the airflow direction. The coarse filter section consists of several layers of stacked filter screens, and the fine filter section contains graphite carbon filter cotton. This ensures that the airflow entering the driver's cab meets the limits for particulate matter concentration and particle size.

[0018] According to another aspect of the present invention, a working machine is provided, which includes a cab, an engine compartment housing an engine, a radiator for cooling the engine, and a cooling fan for forcing cooling airflow through the radiator, wherein the engine compartment is connected to the air outlet side of the radiator via a side opening therein, characterized in that the working machine includes the aforementioned heating system.

[0019] According to one embodiment of this utility model, the operating machinery is a wide-body vehicle. The core function of a wide-body vehicle is to transport heavy-duty materials (such as ore from mines and construction waste) or adapt to complex operating scenarios. A high-power engine is a necessary component for achieving efficient heavy-duty transportation. For high-power engines, the engine water jacket temperature is relatively high. This utility model advantageously utilizes the return hot air from the radiator (water tank) for heating the cab, which is environmentally friendly and increases energy efficiency.

[0020] This invention's heating system fully utilizes the hot air returning from the engine fan's water tank to heat the cab in winter, avoiding the increased fuel consumption associated with existing heating technologies that use water from the engine's water jacket. This improves overall energy efficiency. Furthermore, it is environmentally friendly, avoiding thermal pollution of the surrounding environment. Intelligent and personalized control methods greatly enhance control flexibility, meeting individual needs and increasing comfort. Attached Figure Description

[0021] The features and advantages of this utility model will become clear from the following detailed description provided with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limitations on this utility model, wherein:

[0022] Figure 1 A schematic diagram of a heating system for working machinery according to the present invention is shown.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Heating system; 10. Cab; 20. Engine; 30. Engine compartment; 40. Radiator; 50. Cooling fan; 60. Air hood; 70. Electric fan; 71. Battery; 80. Hot air duct; 90. Purification device; 901. Coarse filter; 902. Fine filter; X, arrow; IP, instrument panel; ES, ambient temperature sensor; HS, manual switch. Detailed Implementation

[0025] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to enable those skilled in the art to more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that implementations of the present invention may not include some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. Rather, the present invention can be conceived to be implemented with any combination of the features and elements described below, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be construed as elements or limitations of the claims unless expressly set forth in the claims.

[0026] The terms "first" and "second" are used below to describe the elements of this application. These terms are used only to distinguish the individual elements and not to limit the nature, order, or number of these elements. The terms "comprising" and "having" are used to indicate an open-ended inclusion and mean that there may be additional elements / components besides those listed.

[0027] Figure 1A heating system 1 for working machinery according to one embodiment of the present invention is shown. The working machinery includes a cab 10 and an engine compartment 30 housing an engine 20. A water tank (radiator 40) for cooling water flowing in the engine water jacket is provided near the engine. Typically, a cooling fan 50 is provided on or near the water tank to force ambient air into the radiator 40 as a cooling airflow. The cooling airflow exchanges heat with the hot water inside the radiator as it flows through it. The heated airflow flowing from the air outlet side of the radiator enters the engine compartment 30 through a side opening in the engine compartment shell wall. Figure 1 This is a simplified view and does not show the side opening. See also Figure 1 As shown by arrow X, airflow flows into the engine compartment through a side opening in the engine compartment wall in the direction indicated by the arrow.

[0028] exist Figure 1 In the illustrated embodiment, the cooling fan 50 is located within the engine compartment 30 and is directly driven by the engine 20. Driven by the engine's output shaft, the cooling fan draws in cool air from the outside environment, drawing it through the radiator and into the engine compartment 30. The temperature inside the engine compartment is higher than the outside air temperature but still lower than the engine temperature; therefore, the airflow still cools the engine as it passes around its perimeter.

[0029] The heating system 1 according to the present invention includes: a gas collection hood 60, which is connected to the interior space of the engine compartment, and an electric fan 70 is provided inside the gas collection hood to draw hot air from the engine compartment into the gas collection hood; a hot air duct 80 for guiding the hot air collected in the gas collection hood to the cab; and a purification device 90 provided in the hot air duct, which is configured to purify the hot air from the gas collection hood.

[0030] Specifically, in the illustrated embodiment, the air intake shroud 60 is located in the upper part of the engine compartment 30. For example, the air intake shroud 60 is fixedly mounted on the top of the engine compartment by suspension. Preferably, the air intake shroud is located in an area away from the engine fan end or the opening on the upper side of the engine compartment shell wall. The illustrated air intake shroud 60 has a tapered or frustoconical longitudinal section, with its large-diameter opening end facing the interior of the engine compartment 30. Hot airflow from inside the engine compartment flows towards the top or small-diameter end of the air intake shroud 60 under the suction of the electric fan 70, and large dust particles collide with the shroud wall and fall off during the flow. In addition, the tapered configuration of the air intake shroud along the airflow direction helps to reduce the dynamic loss of hot air, and this thermodynamically optimized design can also accelerate the airflow velocity, quickly delivering the airflow to the cockpit via hot air ducts.

[0031] Because the engine compartment is only sealed at the top, with gaps at the bottom, dust easily enters when the vehicle is moving. Hot air inside the engine compartment continuously flows to the rear of the compartment under the negative pressure applied by the cooling fan. To ensure that the air collected by the air shroud reaches the target cleanliness level, this invention includes a purification device 90 in the hot air duct 80. In the illustrated embodiment, the purification device 90 is designed in the form of a box and is located at the end of the hot air duct 80 that extends into the cab 10. The purification device 90 includes a coarse filter section 901 and a fine filter section 902 arranged sequentially along the airflow direction. The coarse filter section consists of several layers of stacked filter screens, and the fine filter section has graphite carbon filter cotton fixed inside. The filter screens are supported by four plastic supports for easy removal from the purification box for dust removal. The graphite carbon filter cotton can also be removed from the purification box for dust removal. After being filtered and purified, the hot air finally enters the cab to provide heating.

[0032] In the illustrated embodiment, the electric fan 70 is powered by an external battery 71.

[0033] The heating system 1 according to this utility model also includes an electronic control device (not shown). The electronic control device includes an instrument panel, an ambient temperature sensor, and a driver's cabin temperature sensor. The instrument panel IP, the ambient temperature sensor ES, and the driver's cabin temperature sensor (not shown) are all electrically connected to the control circuit of the electronic control device. The control circuit of the electronic control device is signal-connected to the electronic fan 70. The instrument panel IP is located in the driver's cabin. The instrument panel has an operating section for triggering the automatic heating mode. The electronic control device receives a signal from the ambient temperature sensor detecting the ambient temperature. After the driver enters the vehicle and turns on the power, upon seeing that the ambient temperature sensor detects a low-temperature environment, the driver operates the instrument panel IP to trigger the automatic heating mode. The driver can preset the operating temperature range on the instrument panel. In automatic heating mode, when the ambient temperature detected by the ambient temperature sensor falls within the preset operating temperature range (e.g., below -10°C or -20°C, or above -50°C), the electronic control unit sends an automatic start command to the electric fan 70. The electric fan then starts working, drawing hot air from inside the engine compartment into the hot air duct. After entering the purification device 90 and undergoing two stages of filtration to remove dust, the hot air enters the driver's cab to warm it. At this time, the heat in the hot air comes from the heat carried by the radiator by the air drawn back in by the cooling fan and the heat dissipated by the engine 20 during operation. When the ambient temperature exceeds the preset operating temperature range, the electronic control unit sends an automatic shut-off command to the electric fan, and the automatic heating mode is turned off.

[0034] The electronic control unit is also connected to a temperature sensor in the cab 10 to receive a signal representing the temperature inside the cab. When the cab temperature detected by the cab temperature sensor falls within a specific preset operating temperature range, the electronic control unit sends an automatic start command to the electric fan. When the cab temperature detected by the cab temperature sensor is higher than a preset high temperature threshold (e.g., 25°C), the electronic control unit sends an automatic shut-off command to the electric fan 70.

[0035] Of course, the electric fan 70 can also be turned on or off by combining the ambient temperature and the temperature inside the cab.

[0036] The electronic control unit also includes a manual switch HS. The manual switch is electrically connected to the control circuit of the electronic control unit. The manual switch HS is located in the driver's cab and has an operating terminal for triggering the manual heating mode. The electronic control unit can be configured to directly control the opening and closing of the electric fan 70 via the manual switch. Using the manual heating mode, the driver can manually turn on the manual switch when they feel the need for heating. The electric fan inside the vent 60 starts working, drawing hot air from the engine compartment into the hot air duct 80. After entering the purification device, the hot air undergoes two stages of filtration to remove dust before entering the driver's cab to provide heating. When the driver no longer needs heating, they simply press the manual switch to turn off the heating.

[0037] In this invention, the manual switch and the control circuit of the electronic control device form a first control loop, and the instrument panel and the control circuit of the electronic control device form a second control loop. Both the first and second control loops are electrically connected to the electric fan. The electronic control device can also be configured such that when the manual heating mode is triggered, the first control loop directly turns on or off to control the electric fan's on / off state, and the on / off state of the first control loop takes precedence over the on / off state of the second control loop. That is, the manual heating mode triggered by the manual switch has a higher priority than the automatic heating mode triggered by the instrument panel. Even when the automatic heating mode is activated, the heating system can be switched to manual heating mode via the manual switch to control the system's on / off state. The heating system of this invention provides both automatic and manual temperature control modes, simultaneously meeting the requirements of system intelligence and personalized comfort.

[0038] According to another aspect of this utility model, a working machine including a heating system 1 is provided. This working machine is preferably a wide-body vehicle. Wide-body vehicles are suitable for heavy loads and are equipped with high-power engines, mostly with a power of 300-500 horsepower, and some ultra-large mining wide-body vehicles can reach over 600 horsepower. For example, wide-body vehicles used for transporting materials in mines can handle materials weighing up to 100 tons. The temperature inside the engine compartment can reach 50-60 degrees Celsius, even in extremely cold winter weather. Therefore, by equipping the wide-body vehicle with the heating system of this utility model, all the hot air collected in the engine compartment is recovered and utilized to heat the cab, solving both the engine heat dissipation problem and improving engine efficiency, as well as the problem of low or insufficient heating in the cab during extremely cold weather.

[0039] Industrial applicability

[0040] The heating system according to this invention is particularly suitable for operating machinery with high-power engines and in harsh working environments. However, it should be understood that the heating system according to this invention can also be used for other equipment that requires supplemental heating of the cab.

[0041] As described above, with the heating system of this invention, when the vehicle is started in winter, after the driver powers on the vehicle, the ambient temperature sensor transmits the detected ambient temperature signal to the electronic control device. The electronic control device automatically determines whether the heating system needs to be turned on and whether the automatic heating mode needs to be activated according to the control strategy. The driver can choose the automatic heating mode or manually turn on the manual heating mode by turning on the manual switch on the dashboard in the driver's cab. After activation, hot air in the engine compartment flows continuously to the rear of the engine compartment due to the negative pressure generated by the cooling fan at the front of the engine. It is then drawn into the hot air duct by the air intake hood. Multiple electric fans arranged inside the air intake hood provide negative pressure for the drawn-in hot airflow, continuously delivering hot air to the driver's cab. Before entering the driver's cab, the hot airflow enters a purification device to filter out dust. After filtration, the hot airflow enters the driver's cab to heat the interior.

[0042] Various modifications and variations can be made to the embodiments disclosed above without departing from the scope or spirit of this invention. Other embodiments of this invention will be apparent to those skilled in the art based on the practice of this invention disclosed in this specification. This specification and the examples disclosed herein should be considered illustrative only, and the true scope of this invention is defined by the appended claims and their equivalents.

Claims

1. A heating system for operating machinery, the operating machinery comprising a cab, an engine compartment housing an engine, a radiator for cooling the engine, and a cooling fan for forcing cooling airflow through the radiator, the engine compartment communicating with the air outlet side of the radiator via a side opening therethrough, characterized in that, The heating system includes: The hood is connected to the interior space of the engine compartment. An electric fan is installed inside the hood to draw hot air from the engine compartment into the hood. Hot air ducts used to guide the hot air collected in the vent hood to the driver's cab; and A purification device is installed in the hot air duct, which is configured to purify the hot air flow from the gas collection hood.

2. The heating system according to claim 1, characterized in that, The vent cover is located in the upper part of the engine compartment.

3. The heating system according to claim 2, characterized in that, The gas collection shroud is located in the engine compartment in an area away from the side opening.

4. The heating system according to claim 3, characterized in that, The gas collection shroud has a conical or truncated conical longitudinal section, with its large-diameter opening facing the interior of the engine compartment.

5. The heating system according to claim 4, characterized in that, The cooling fan is driven by the engine and located in the engine compartment.

6. The heating system according to claim 5, characterized in that, The electrical control device of the heating system includes an instrument panel, an ambient temperature sensor, and a driver's cabin temperature sensor. The instrument panel, ambient temperature sensor, and driver's cabin temperature sensor are all electrically connected to the control circuit of the electrical control device. The control circuit of the electrical control device is also electrically connected to the electronic fan. The instrument panel is provided with an operating part for triggering the automatic heating mode. The electrical control device is configured to control the opening and closing of the electronic fan based on the ambient temperature signal output by the ambient temperature sensor and / or the driver's cabin temperature signal output by the driver's cabin temperature sensor when the automatic heating mode is triggered.

7. The heating system according to claim 6, characterized in that, The electronic control device includes a manual switch, which forms a first control loop with the control circuit of the electronic control device. The instrument panel forms a second control loop with the control circuit of the electronic control device. Both the first and second control loops are electrically connected to the electronic fan. The manual switch is provided with an operating terminal for triggering a manual heating mode. The electronic control device is configured such that when the manual heating mode is triggered, the first control loop is directly turned on or off to control the opening and closing of the electronic fan, and the on or off state of the first control loop takes precedence over the on or off state of the second control loop.

8. The heating system according to any one of claims 1 to 7, characterized in that, The purification device includes a coarse filter section and a fine filter section arranged sequentially along the airflow direction. The coarse filter section consists of several layers of stacked filter screens, and the fine filter section is equipped with graphite carbon filter cotton.

9. A type of work machinery, comprising a cab, an engine compartment housing an engine, a radiator for cooling the engine, and a cooling fan for forcing cooling airflow through the radiator, the engine compartment communicating with the air outlet side of the radiator via a side opening therein, characterized in that, The operating machinery includes the heating system as described in any one of claims 1-8.

10. The operating machinery according to claim 9, characterized in that, The operating machinery is a wide-body vehicle.

Images