US20220016680A1 - Agricultural sprayer with warm water rinse system - Google Patents
Agricultural sprayer with warm water rinse system Download PDFInfo
- Publication number
- US20220016680A1 US20220016680A1 US17/413,823 US201917413823A US2022016680A1 US 20220016680 A1 US20220016680 A1 US 20220016680A1 US 201917413823 A US201917413823 A US 201917413823A US 2022016680 A1 US2022016680 A1 US 2022016680A1
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- Prior art keywords
- rinse
- tank
- fluid
- product
- crop sprayer
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- Abandoned
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 15
- 239000012530 fluid Substances 0.000 claims abstract description 101
- 239000002918 waste heat Substances 0.000 claims abstract description 26
- 238000009428 plumbing Methods 0.000 claims abstract description 21
- 239000004476 plant protection product Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 8
- 239000007921 spray Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000004009 herbicide Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
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- -1 but not limited to Substances 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 244000037666 field crops Species 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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- 239000003630 growth substance Substances 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C15/00—Fertiliser distributors
- A01C15/005—Undercarriages, tanks, hoppers, stirrers specially adapted for seeders or fertiliser distributors
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
- A01M7/005—Special arrangements or adaptations of the spraying or distributing parts, e.g. adaptations or mounting of the spray booms, mounting of the nozzles, protection shields
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
- A01M7/0082—Undercarriages, frames, mountings, couplings, tanks
- A01M7/0085—Tanks
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
- A01M7/0089—Regulating or controlling systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
- B08B2203/007—Heating the liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2209/00—Details of machines or methods for cleaning hollow articles
- B08B2209/08—Details of machines or methods for cleaning containers, e.g. tanks
Definitions
- the present invention relates to an agricultural sprayer and a method of operating such a sprayer.
- Agricultural sprayers are used in the application of various materials to field crops. Such systems apply various chemicals in the form of a spray for the purposes of crop protection, e.g., through the use of appropriate pesticides or herbicides, or for the purposes of limiting or promoting plant growth, e.g., through use of liquid growth regulators and fertilizer, respectively.
- Agricultural sprayers may be provided as self-propelled sprayers, or as systems to be mounted to an agricultural tractor, e.g., as a towed or hitch-mounted implement.
- Agricultural crop sprayers typically comprise a product tank for holding a solution of plant protection product, and a product dispensing system for applying the solution to the field or crop.
- the product dispensing system is commonly provided by a series of nozzles spaced along a boom which itself extends transversely with respect to a forward direction of travel.
- a plumbing network is provided to fluidly connect the product tank with the nozzles and typically comprises hoses and controllable valves to direct the fluid as required.
- Such cleaning procedures often require the rinsing of the product tank and plumbing with a large volume of rinse water to ensure safe concentration levels.
- Such excessive use of water can be relatively wasteful, as well as resulting in increased cost levels for sprayer operators.
- sprayers can often be required to return to a centralized depot for a cleaning operation, if the relatively large volumes of rinse water or cleaning solutions are too bulky to transport with the sprayer itself.
- An agricultural crop sprayer includes a product tank for holding a solution of plant protection product, a product dispense system, a rinse tank for holding a rinse fluid, and a plumbing network which fluidly connects the product tank, the product dispense system and the rinse tank, wherein the sprayer includes a heat source configured to heat the rinse fluid.
- a method of operating an agricultural crop sprayer comprising a product tank for holding a solution of plant protection product, a product dispense system, and a rinse tank for holding a rinse fluid is also disclosed.
- the method includes heating the rinse fluid above ambient temperature and conveying the heated rinse fluid from the rinse tank to at least one of the product tank and the product dispense system.
- the sprayer is more effectively rinsed.
- Warm or hot water has an increased kinetic activity and a higher saturation point compared to cooler ambient water. Therefore, heated water is more effective at removing chemical residues, especially sticky or powdery residues that are difficult to shift with cold water.
- the disclosed system and method may deliver more effective removal of chemical residues and offer the potential to reduce the volume of water required to deliver sufficient cleaning.
- a prime mover provides the heat source.
- the prime mover may be an internal combustion engine or an electric motor by way of example. It will be recognized that sprayers typically include an engine, whether that be an engine of a self-propelled sprayer or an engine of a tractor towing a trailed sprayer.
- the prime mover may serve to deliver a driving torque to ground engaging wheels for propulsion of the sprayer.
- Prime movers typically expel significant quantities of waste energy in the form of heat.
- this waste heat can be exploited to heat the rinse fluid.
- a heat exchange system may be configured to transfer waste heat from the prime mover to the rinse fluid wherein a first heat exchanger is arranged to extract waste heat from the prime mover.
- Waste heat from the prime mover can be transferred to the rinse fluid using one of several different arrangements.
- the heat exchange system involves a closed fluid circuit which includes the heat exchanger associated with the prime mover and a second heat exchanger located inside the rinse tank.
- a closed cooling circuit of the prime mover is extended so as to transfer the waste heat to the rinse fluid indirectly.
- the second heat exchanger may, for example, comprise a coil immersed in the rinse fluid inside the rinse tank.
- waste heat is transferred directly from the prime mover to the rinse fluid.
- the heat exchange system comprises a fluid circuit which includes the first heat exchanger fluidly connected to the rinse tank, wherein the rinse fluid serves as a heat exchange medium which is passed through, or proximate to, the prime mover.
- the heat exchange system may further comprise a thermostat to regulate the temperature of the rinse fluid.
- a hydraulic system provides the heat source.
- the hydraulic system may include a hydraulic pump and one or more hydraulic consumers for powering various systems on the sprayer.
- a trailed sprayer comprises a hydraulic pump that is driven mechanically from a power takeoff shaft of a tractor attached to the sprayer. Waste heat generated by the hydraulic system may be collected and transferred to the rinse fluid by a heat exchange system, which may include a closed fluid circuit.
- a further advantage is a reduced dedicated cooling requirement and thus a cooling system of a reduced size.
- the extraction of the waste heat itself serves to cool the prime mover or hydraulic system.
- a dedicated heat source is provided.
- the heat source may be a liquid fuel burner or an electrically-powered immersion heater.
- a further rinse tank serves as a cold rinse tank for holding rinse fluid at a cooler ambient temperature.
- a heated rinse tank and an ambient or cold rinse tank are provided. It is recognized that heated rinsings may have a detrimental effect if applied to a crop.
- a sequenced rinsing process may be employed wherein a heated rinse step is followed by a cold rinse step. The rinsings may be combined before being dispensed.
- a sprayer having both hot and cold rinse tanks offers several advantages. Firstly, the heated rinsings may be cooled before being dispensed to crops as explained above. Secondly, a smaller volume of heated rinse fluid may be required, thus potentially allowing for the rinse fluid to be heated to higher temperatures with the same energy input.
- FIG. 1 is an illustration of an agricultural crop sprayer
- FIG. 2 is a schematic drawing of a sprayer system according to a first embodiment, for use with the sprayer of FIG. 1 ;
- FIG. 3 is a schematic drawing of a sprayer system according to a second embodiment, for use with the sprayer of FIG. 1 ;
- FIG. 4 is a schematic drawing of a sprayer system according to a third embodiment, for use with the sprayer of FIG. 1 ;
- FIG. 5 is a schematic drawing of a sprayer system according to a fourth embodiment, for use with the sprayer of FIG. 1 ;
- FIG. 6 is a process diagram for an operating method of the sprayer system of FIG. 5 .
- FIG. 1 shows an agricultural crop sprayer 10 used to apply crop protection products to agricultural crops in a field.
- Agricultural crop sprayer 10 comprises a chassis 12 and a cab 14 mounted on the chassis 12 .
- Cab 14 may house an operator and a number of controls for the sprayer 10 .
- An internal combustion engine 16 may be mounted on a forward portion of chassis 12 in front of cab 14 or may be mounted on a rearward portion of the chassis 12 behind the cab 14 .
- the engine 16 may comprise, for example, a diesel engine or a gasoline powered internal combustion engine.
- the engine 16 provides torque to propel the agricultural sprayer 10 and also to provide energy used to power the on-board spray systems described below.
- the sprayer 10 further comprises a product tank 18 used to store a liquid solution of plant protection product to be sprayed on the field.
- the solution can include chemicals or plant protection products (PPPs), such as but not limited to, herbicides, fungicides, insecticides, plant growth regulators, and/or fertilizers.
- Product tank 18 is mounted on chassis 12 , either in front of or behind cab 14 .
- the crop sprayer 10 can include more than one product tank 18 to store different chemicals to be sprayed on the field. The stored chemicals may be dispersed by the sprayer 10 one at a time or different chemicals may be mixed and dispersed together in a variety of mixtures.
- a sprayer system 50 is illustrated in a schematic outline in FIG. 2 .
- the sprayer system 50 is suitable for implementation on sprayer 10 .
- System 50 further comprises a rinse tank 20 for holding a rinse fluid which can be used to rinse the product tank 18 and associated plumbing after or during a spraying operation.
- At least one boom 22 on the sprayer 10 is used to distribute the fluid from the product tank 18 over a wide swath as the sprayer 10 is driven through the field.
- the boom 22 is mounted to the rear of the chassis 12 and extends transversely away the chassis 12 .
- the boom is provided as part of a product dispense system 23 , which further comprises an array of spray nozzles 24 arranged along the length of the boom 22 .
- a plumbing network fluidly connects the product tank 18 , the product dispense system 23 , and the rinse tank 20 .
- the plumbing network will be understood to comprise any suitable valves, tubing, or piping arranged for fluid communication of these components.
- the plumbing network comprises a suction portion connected to a suction side of fluid pump 25 and a pressurized portion connected to a pressure side of pump 25 .
- Pump 25 is driven in this embodiment by a drive connection 26 that derives torque from engine 16 .
- the suction portion of the plumbing network includes an input valve or manifold 28 that selectively connects a respective outlet of the product tank 18 and the rinse tank 20 to a suction side of the pump 25 .
- a boom recirculation line 29 is also connected to the input manifold 28 .
- the pressurized portion of the plumbing network comprises a distribution valve 30 that selectively directs pressurized fluid from the pressure side of pump 25 to one of a boom supply line 32 and a tank rinse line 34 .
- the manifolds 28 , 30 can comprise any suitable configuration of valve elements, e.g., a single multi-port valve element, or an array of individual elements.
- the sprayer 10 further comprises an electronic control unit (ECU) 36 , which is configured to control the operation of the various components of the system, e.g., the distribution valve 30 , the input valve 28 , the pump 25 , the nozzles 24 , and the boom arm 22 position.
- the ECU 36 can operate in response to commands issued by an operator in the sprayer cab 14 , or based on pre-programmed operating routines, which may be triggered by operator action.
- the pump 25 draws PPP solution from the product tank 18 via input the manifold 28 and delivers the solution at pressure to the product dispense system 23 via the distribution valve 30 and boom supply line 32 .
- the pressurized solution is dispensed to the field by the nozzles 24 .
- the PPP solution may be recirculated via the boom recirculation line 29 .
- the pump 25 draws rinse fluid from the rinse tank 20 via the input manifold 28 and delivers the rinse fluid at pressure to a set of tank rinse nozzles 38 via the tank rinse line 34 .
- the tank rinse nozzles 38 are mounted inside the product tank 18 and are positioned to direct a cleaning jet of fluid at the internal surfaces of the product tank 18 .
- the rinse mode of operation may involve the distribution manifold 30 directing some or all of the pressurized rinse fluid through the boom supply line 32 and the boom recirculation line 29 to rinse chemical residue therefrom.
- the rinse fluid is heated by waste heat from the engine 16 .
- a heat exchange system 40 comprises a closed fluid circuit having a heat exchanger 42 immersed in the rinse fluid inside the rinse tank 20 .
- the heat exchanger 42 is fluidly connected in the fluid circuit to a further heat exchanger that is associated or integrated with engine 16 .
- the fluid circuit includes a heated line 40 H and a cooled line 40 C.
- the heat exchange system 40 may operate during a spraying mode of operation so as to scavenge and exploit the waste heat from engine 16 to heat the rinse fluid. By using heated rinse fluid, the cleaning effectiveness during the rinse mode is significantly improved.
- a thermostat 43 in the heat exchange system may regulate the temperature of the rinse fluid.
- the thermostat 43 may be adapted to regulate the temperature from about 60° C. (140° F.) to about 70° C. (158° F.).
- the thermostat 43 may be in communication with the ECU 36 , wherein the ECU 36 may be configured to control the temperature of the rinse fluid dependent upon operating conditions or upon operator commands.
- a second embodiment of a spray system 60 uses a different heat exchange system to that shown in FIG. 2 and described above in relation to heating the rinse fluid.
- waste heat from the engine 16 is recovered and transferred directly to the rinse fluid.
- the heat exchange system 52 uses the rinse fluid itself as a heat exchange medium by transporting the rinse fluid from the rinse tank 20 to a heat exchanger associated with engine 16 and returning the heated fluid to the rinse tank 20 .
- the fluid circuit comprises a heated line 52 H and a cooled line 52 C.
- the fluid may be circulated by a water pump (not shown) drivingly connected to the engine 16 .
- a third embodiment of a spray system 70 uses waste heat from parts of an on-board hydraulic system, in this case the pump 25 . It should be understood that engine 16 and the input manifold control line have been omitted from FIG. 4 only for reasons of clarity. In this embodiment, waste heat from the pump 25 is recovered and transferred directly to the rinse fluid.
- a heat exchange system 62 comprises a heat exchanger 64 that is mounted proximate to, or integrated with, the pump 25 .
- the heat exchanger 64 is connected in a fluid circuit having a heated line 62 H and a cooled line 62 C.
- the cooled line 62 C conveys rinse fluid from rinse tank 20 to the heat exchanger 64
- the heated line conveys heated rinse fluid from the heat exchanger 64 to the rinse tank 20 .
- a pump (not shown) may be provided in the fluid circuit to force movement of the rinse fluid.
- the rinse fluid is heated directly by the heat exchange system 62 .
- an independent closed fluid circuit could alternatively be provided together with a heat exchanger in the rinse tank 20 to heat the rinse fluid indirectly.
- waste heat from the pump 25 of the sprayer system 70 is extracted in this embodiment, waste heat from other components of a hydraulic system could instead be scavenged.
- a spray system 80 comprises a heated rinse tank 20 and a cold rinse tank 73 .
- the rinse fluid in the heated rinse tank 20 is heated using a heat exchange system 40 which is the same as that used by the first embodiment illustrated in FIG. 2 .
- a heat exchange system 40 which is the same as that used by the first embodiment illustrated in FIG. 2 .
- the manner in which the rinse fluid is heated is not critical to this embodiment.
- the cold rinse tank 73 serves to hold a volume of rinse fluid at ambient temperature (which is generally cooler than the heated rinse fluid) as is common in known sprayers.
- the cold water rinse tank 73 has an outlet connected to the input manifold 28 for selective delivery of cold rinse fluid through the pump 25 .
- the cold rinse fluid from the cold rinse tank 73 can be used in a second stage of rinsing to cool the rinse fluid before being discharged.
- FIG. 6 An example method of operation of the spray system 80 of FIG. 5 is illustrated in FIG. 6 .
- a first step 101 the rinse fluid in heated rinse tank 20 is heated above ambient temperature by transfer of waste heat from the engine 16 as explained above in relation to FIG. 2 .
- the heated rinse fluid may be heated in excess of 40° C. (104° F.).
- a rinse routine is initiated by a user command to the ECU 36 .
- the ECU 36 controls input manifold 28 (third step 103 ) to connect the heated rinse tank 20 to the pump 25 .
- the ECU 36 controls the distribution manifold 30 to connect the pressure side of pump 25 to one or both of the boom supply line 32 and the tank rinse line 34 .
- the rinsings may be recirculated via the boom recirculation line 29 and/or the outlet of product tank 18 .
- a fourth step 104 the ECU 36 controls the input manifold 28 to connect the cold rinse tank 73 to the pump 25 . This directs the cold (or ambient) rinse fluid in the cold rinse tank 73 through the plumbing network and to the tank rinse nozzles 38 .
- rinsings are dispensed typically via the nozzles 24 .
- dedicated heating sources may heat the rinse fluid in the rinse tank 20 .
- a diesel burner or an electrically-powered immersion heater could be provided in an embodiment.
- heat may be scavenged from an engine or exhaust of a tractor to which the sprayer is attached.
- heat may be scavenged from a PTO-driven pump mounted to the chassis of a trailed sprayer.
- an agricultural crop sprayer may include a product tank for holding a solution of plant protection product, a product dispense system, and a rinse tank for holding a rinse fluid.
- a plumbing network fluidly connects the product tank, the product dispense system, and the rinse tank.
- a heat source is provided to heat the rinse fluid.
- the heat source may be a prime mover or a hydraulic pump from which waste heat is scavenged.
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Abstract
An agricultural crop sprayer includes a product tank for holding a solution of plant protection product, a product dispense system, and a rinse tank for holding a rinse fluid. A plumbing network fluidly connects the product tank, the product dispense system, and the rinse tank. A heat source is provided to heat the rinse fluid. The heat source may be a prime mover or a hydraulic pump, wherein waste heat is scavenged therefrom.
Description
- This application is a national phase entry under 35 U.S.C. § 371 of International Patent Application PCT/EP2019/082874, filed Nov. 28, 2019, designating the United States of America and published in English as International Patent Publication WO 2020/126386 A1 on Jun. 25, 2020, which claims the benefit of the filing date of United Kingdom Patent Application GB1820704.3, “Agricultural Sprayer with Warm Water Rinse System,” filed Dec. 19, 2018, the entire disclosure of which is incorporated herein by reference.
- The present invention relates to an agricultural sprayer and a method of operating such a sprayer.
- Agricultural sprayers are used in the application of various materials to field crops. Such systems apply various chemicals in the form of a spray for the purposes of crop protection, e.g., through the use of appropriate pesticides or herbicides, or for the purposes of limiting or promoting plant growth, e.g., through use of liquid growth regulators and fertilizer, respectively. Agricultural sprayers may be provided as self-propelled sprayers, or as systems to be mounted to an agricultural tractor, e.g., as a towed or hitch-mounted implement.
- Agricultural crop sprayers typically comprise a product tank for holding a solution of plant protection product, and a product dispensing system for applying the solution to the field or crop. The product dispensing system is commonly provided by a series of nozzles spaced along a boom which itself extends transversely with respect to a forward direction of travel. A plumbing network is provided to fluidly connect the product tank with the nozzles and typically comprises hoses and controllable valves to direct the fluid as required.
- One of the primary concerns in the use of potentially harmful chemicals such as pesticides or fertilizers is that proper cleaning and maintenance of sprayers is necessary to avoid injury to non-target crop species, e.g., through the incorrect application of residual chemicals from a preceding sprayer operation. Accordingly, sprayer operators must pay close attention to proper cleaning procedures, to prevent contamination or injury to crops or to the environment in general.
- It is known to provide sprayers with an on-board rinse tank which is separate to the product tank and is connected to the plumbing network. During a rinse process, which may be concurrent with a spraying operation, clean water is conveyed from the rinse tank through the plumbing network to the nozzles and/or the product tank. The dilute ‘rinsings’ are then dispensed onto the crop, onto a piece of land, or into a biobed for example.
- Such cleaning procedures often require the rinsing of the product tank and plumbing with a large volume of rinse water to ensure safe concentration levels. However, such excessive use of water can be relatively wasteful, as well as resulting in increased cost levels for sprayer operators. In addition, sprayers can often be required to return to a centralized depot for a cleaning operation, if the relatively large volumes of rinse water or cleaning solutions are too bulky to transport with the sprayer itself.
- An agricultural crop sprayer includes a product tank for holding a solution of plant protection product, a product dispense system, a rinse tank for holding a rinse fluid, and a plumbing network which fluidly connects the product tank, the product dispense system and the rinse tank, wherein the sprayer includes a heat source configured to heat the rinse fluid.
- A method of operating an agricultural crop sprayer comprising a product tank for holding a solution of plant protection product, a product dispense system, and a rinse tank for holding a rinse fluid is also disclosed. The method includes heating the rinse fluid above ambient temperature and conveying the heated rinse fluid from the rinse tank to at least one of the product tank and the product dispense system.
- By using rinse water or fluid that is heated above an ambient temperature, the sprayer is more effectively rinsed. Warm or hot water has an increased kinetic activity and a higher saturation point compared to cooler ambient water. Therefore, heated water is more effective at removing chemical residues, especially sticky or powdery residues that are difficult to shift with cold water. Advantageously, the disclosed system and method may deliver more effective removal of chemical residues and offer the potential to reduce the volume of water required to deliver sufficient cleaning.
- In some embodiments, a prime mover provides the heat source. The prime mover may be an internal combustion engine or an electric motor by way of example. It will be recognized that sprayers typically include an engine, whether that be an engine of a self-propelled sprayer or an engine of a tractor towing a trailed sprayer. The prime mover may serve to deliver a driving torque to ground engaging wheels for propulsion of the sprayer.
- Prime movers typically expel significant quantities of waste energy in the form of heat. Advantageously, this waste heat can be exploited to heat the rinse fluid. A heat exchange system may be configured to transfer waste heat from the prime mover to the rinse fluid wherein a first heat exchanger is arranged to extract waste heat from the prime mover.
- Waste heat from the prime mover can be transferred to the rinse fluid using one of several different arrangements. In one embodiment, the heat exchange system involves a closed fluid circuit which includes the heat exchanger associated with the prime mover and a second heat exchanger located inside the rinse tank. In this arrangement, a closed cooling circuit of the prime mover is extended so as to transfer the waste heat to the rinse fluid indirectly. The second heat exchanger may, for example, comprise a coil immersed in the rinse fluid inside the rinse tank.
- In another embodiment, waste heat is transferred directly from the prime mover to the rinse fluid. In this embodiment, the heat exchange system comprises a fluid circuit which includes the first heat exchanger fluidly connected to the rinse tank, wherein the rinse fluid serves as a heat exchange medium which is passed through, or proximate to, the prime mover.
- The heat exchange system may further comprise a thermostat to regulate the temperature of the rinse fluid.
- In yet another embodiment, a hydraulic system provides the heat source. The hydraulic system may include a hydraulic pump and one or more hydraulic consumers for powering various systems on the sprayer. In one example, a trailed sprayer comprises a hydraulic pump that is driven mechanically from a power takeoff shaft of a tractor attached to the sprayer. Waste heat generated by the hydraulic system may be collected and transferred to the rinse fluid by a heat exchange system, which may include a closed fluid circuit.
- In the case of scavenged waste heat serving as the heat source, whether that be from a prime mover or from a hydraulic system, a further advantage is a reduced dedicated cooling requirement and thus a cooling system of a reduced size. In other words, the extraction of the waste heat itself serves to cool the prime mover or hydraulic system.
- In yet another embodiment, a dedicated heat source is provided. For example the heat source may be a liquid fuel burner or an electrically-powered immersion heater.
- In another embodiment, a further rinse tank serves as a cold rinse tank for holding rinse fluid at a cooler ambient temperature. In this arrangement, there is provided a heated rinse tank and an ambient or cold rinse tank. It is recognized that heated rinsings may have a detrimental effect if applied to a crop. By providing a second rinse tank for cooler water, a sequenced rinsing process may be employed wherein a heated rinse step is followed by a cold rinse step. The rinsings may be combined before being dispensed.
- A sprayer having both hot and cold rinse tanks offers several advantages. Firstly, the heated rinsings may be cooled before being dispensed to crops as explained above. Secondly, a smaller volume of heated rinse fluid may be required, thus potentially allowing for the rinse fluid to be heated to higher temperatures with the same energy input.
- Further advantages of the invention will be apparent from reading the following description of specific embodiments of the invention with reference to the appended drawings in which:
-
FIG. 1 is an illustration of an agricultural crop sprayer; -
FIG. 2 is a schematic drawing of a sprayer system according to a first embodiment, for use with the sprayer ofFIG. 1 ; -
FIG. 3 is a schematic drawing of a sprayer system according to a second embodiment, for use with the sprayer ofFIG. 1 ; -
FIG. 4 is a schematic drawing of a sprayer system according to a third embodiment, for use with the sprayer ofFIG. 1 ; -
FIG. 5 is a schematic drawing of a sprayer system according to a fourth embodiment, for use with the sprayer ofFIG. 1 ; and, -
FIG. 6 is a process diagram for an operating method of the sprayer system ofFIG. 5 . - The following detailed description illustrates the invention by way of example and not by way of limitation. This description will clearly enable one skilled in the art to make and use the invention, and describes several embodiments, adaptations, variations, alternatives and uses of the invention, including what we presently believe is the best mode of carrying out the invention. Additionally, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or being carried out in various ways.
- Use of directional terms such as “front”, “rear”, “longitudinal” and “transverse” in the following description of specific embodiments is made in relation to the normal forward direction of travel of an agricultural crop sprayer having a longitudinal axis parallel to the direction of travel.
- Various embodiments are illustrated and described. Like components that are common to multiple embodiments will share the same reference numerals for ease of understanding.
-
FIG. 1 shows anagricultural crop sprayer 10 used to apply crop protection products to agricultural crops in a field.Agricultural crop sprayer 10 comprises achassis 12 and acab 14 mounted on thechassis 12.Cab 14 may house an operator and a number of controls for thesprayer 10. Aninternal combustion engine 16 may be mounted on a forward portion ofchassis 12 in front ofcab 14 or may be mounted on a rearward portion of thechassis 12 behind thecab 14. Theengine 16 may comprise, for example, a diesel engine or a gasoline powered internal combustion engine. Theengine 16 provides torque to propel theagricultural sprayer 10 and also to provide energy used to power the on-board spray systems described below. - Although a self-propelled crop sprayer is shown and described hereinafter, it should be understood that the disclosure is applicable to other agricultural sprayers including pull-type or towed sprayers and mounted sprayers, e.g., mounted on a 3-point linkage of an agricultural tractor.
- The
sprayer 10 further comprises aproduct tank 18 used to store a liquid solution of plant protection product to be sprayed on the field. The solution can include chemicals or plant protection products (PPPs), such as but not limited to, herbicides, fungicides, insecticides, plant growth regulators, and/or fertilizers.Product tank 18 is mounted onchassis 12, either in front of or behindcab 14. Thecrop sprayer 10 can include more than oneproduct tank 18 to store different chemicals to be sprayed on the field. The stored chemicals may be dispersed by thesprayer 10 one at a time or different chemicals may be mixed and dispersed together in a variety of mixtures. - A
sprayer system 50 according to one embodiment is illustrated in a schematic outline inFIG. 2 . Thesprayer system 50 is suitable for implementation onsprayer 10.System 50 further comprises a rinsetank 20 for holding a rinse fluid which can be used to rinse theproduct tank 18 and associated plumbing after or during a spraying operation. - At least one
boom 22 on thesprayer 10 is used to distribute the fluid from theproduct tank 18 over a wide swath as thesprayer 10 is driven through the field. Theboom 22 is mounted to the rear of thechassis 12 and extends transversely away thechassis 12. The boom is provided as part of a product dispensesystem 23, which further comprises an array ofspray nozzles 24 arranged along the length of theboom 22. - A plumbing network fluidly connects the
product tank 18, the product dispensesystem 23, and the rinsetank 20. The plumbing network will be understood to comprise any suitable valves, tubing, or piping arranged for fluid communication of these components. - In more detail, the plumbing network comprises a suction portion connected to a suction side of
fluid pump 25 and a pressurized portion connected to a pressure side ofpump 25.Pump 25 is driven in this embodiment by adrive connection 26 that derives torque fromengine 16. - The suction portion of the plumbing network includes an input valve or manifold 28 that selectively connects a respective outlet of the
product tank 18 and the rinsetank 20 to a suction side of thepump 25. Aboom recirculation line 29 is also connected to theinput manifold 28. The pressurized portion of the plumbing network comprises adistribution valve 30 that selectively directs pressurized fluid from the pressure side ofpump 25 to one of aboom supply line 32 and a tank rinseline 34. Themanifolds - The
sprayer 10 further comprises an electronic control unit (ECU) 36, which is configured to control the operation of the various components of the system, e.g., thedistribution valve 30, theinput valve 28, thepump 25, thenozzles 24, and theboom arm 22 position. TheECU 36 can operate in response to commands issued by an operator in thesprayer cab 14, or based on pre-programmed operating routines, which may be triggered by operator action. - During a spraying mode of operation, the
pump 25 draws PPP solution from theproduct tank 18 via input the manifold 28 and delivers the solution at pressure to the product dispensesystem 23 via thedistribution valve 30 andboom supply line 32. The pressurized solution is dispensed to the field by thenozzles 24. - Optionally, when the rate of application is low, the PPP solution may be recirculated via the
boom recirculation line 29. - During a rinse mode of operation, the
pump 25 draws rinse fluid from the rinsetank 20 via theinput manifold 28 and delivers the rinse fluid at pressure to a set of tank rinsenozzles 38 via the tank rinseline 34. The tank rinsenozzles 38 are mounted inside theproduct tank 18 and are positioned to direct a cleaning jet of fluid at the internal surfaces of theproduct tank 18. - Optionally, the rinse mode of operation may involve the
distribution manifold 30 directing some or all of the pressurized rinse fluid through theboom supply line 32 and theboom recirculation line 29 to rinse chemical residue therefrom. - In some embodiments, the rinse fluid is heated by waste heat from the
engine 16. Aheat exchange system 40 comprises a closed fluid circuit having aheat exchanger 42 immersed in the rinse fluid inside the rinsetank 20. Theheat exchanger 42 is fluidly connected in the fluid circuit to a further heat exchanger that is associated or integrated withengine 16. The fluid circuit includes aheated line 40H and a cooledline 40C. - The
heat exchange system 40 may operate during a spraying mode of operation so as to scavenge and exploit the waste heat fromengine 16 to heat the rinse fluid. By using heated rinse fluid, the cleaning effectiveness during the rinse mode is significantly improved. - A
thermostat 43 in the heat exchange system may regulate the temperature of the rinse fluid. For example, thethermostat 43 may be adapted to regulate the temperature from about 60° C. (140° F.) to about 70° C. (158° F.). Although a connection is not shown, thethermostat 43 may be in communication with theECU 36, wherein theECU 36 may be configured to control the temperature of the rinse fluid dependent upon operating conditions or upon operator commands. - With reference to
FIG. 3 a second embodiment of aspray system 60 uses a different heat exchange system to that shown inFIG. 2 and described above in relation to heating the rinse fluid. In this embodiment, waste heat from theengine 16 is recovered and transferred directly to the rinse fluid. - The
heat exchange system 52 uses the rinse fluid itself as a heat exchange medium by transporting the rinse fluid from the rinsetank 20 to a heat exchanger associated withengine 16 and returning the heated fluid to the rinsetank 20. The fluid circuit comprises aheated line 52H and a cooledline 52C. The fluid may be circulated by a water pump (not shown) drivingly connected to theengine 16. - With reference to
FIG. 4 , a third embodiment of aspray system 70 uses waste heat from parts of an on-board hydraulic system, in this case thepump 25. It should be understood thatengine 16 and the input manifold control line have been omitted fromFIG. 4 only for reasons of clarity. In this embodiment, waste heat from thepump 25 is recovered and transferred directly to the rinse fluid. - A
heat exchange system 62 comprises aheat exchanger 64 that is mounted proximate to, or integrated with, thepump 25. Theheat exchanger 64 is connected in a fluid circuit having aheated line 62H and a cooledline 62C. The cooledline 62C conveys rinse fluid from rinsetank 20 to theheat exchanger 64, whereas the heated line conveys heated rinse fluid from theheat exchanger 64 to the rinsetank 20. A pump (not shown) may be provided in the fluid circuit to force movement of the rinse fluid. - In the embodiment illustrated by
FIG. 4 the rinse fluid is heated directly by theheat exchange system 62. However, an independent closed fluid circuit could alternatively be provided together with a heat exchanger in the rinsetank 20 to heat the rinse fluid indirectly. - Although waste heat from the
pump 25 of thesprayer system 70 is extracted in this embodiment, waste heat from other components of a hydraulic system could instead be scavenged. - In a fourth embodiment shown in
FIG. 5 , aspray system 80 comprises a heated rinsetank 20 and a cold rinsetank 73. The rinse fluid in the heated rinsetank 20 is heated using aheat exchange system 40 which is the same as that used by the first embodiment illustrated inFIG. 2 . However, it should be appreciated that the manner in which the rinse fluid is heated is not critical to this embodiment. - The cold rinse
tank 73 serves to hold a volume of rinse fluid at ambient temperature (which is generally cooler than the heated rinse fluid) as is common in known sprayers. The cold water rinsetank 73 has an outlet connected to theinput manifold 28 for selective delivery of cold rinse fluid through thepump 25. - It is recognized that, depending on the temperature, heated rinse fluid may cause damage to crops, and therefore discharge of the dilute rinsings should be avoided in some situations. The cold rinse fluid from the cold rinse
tank 73 can be used in a second stage of rinsing to cool the rinse fluid before being discharged. - An example method of operation of the
spray system 80 ofFIG. 5 is illustrated inFIG. 6 . In afirst step 101, the rinse fluid in heated rinsetank 20 is heated above ambient temperature by transfer of waste heat from theengine 16 as explained above in relation toFIG. 2 . For example, the heated rinse fluid may be heated in excess of 40° C. (104° F.). - In a
second step 102, a rinse routine is initiated by a user command to theECU 36. In response, theECU 36 controls input manifold 28 (third step 103) to connect the heated rinsetank 20 to thepump 25. Also, theECU 36 controls thedistribution manifold 30 to connect the pressure side ofpump 25 to one or both of theboom supply line 32 and the tank rinseline 34. As part of this rinse process, the rinsings may be recirculated via theboom recirculation line 29 and/or the outlet ofproduct tank 18. - In a
fourth step 104, theECU 36 controls theinput manifold 28 to connect the cold rinsetank 73 to thepump 25. This directs the cold (or ambient) rinse fluid in the cold rinsetank 73 through the plumbing network and to the tank rinsenozzles 38. - In a
fifth step 105, the rinsings are dispensed typically via thenozzles 24. - Although the above-described embodiments have involved the scavenging of waste heat from prime movers or hydraulic systems, dedicated heating sources may heat the rinse fluid in the rinse
tank 20. For example, a diesel burner or an electrically-powered immersion heater could be provided in an embodiment. - Although the focus of the above-described embodiments has been on a self-propelled crop sprayer, aspects of the disclosure can be implemented on trailed sprayers. In one embodiment, heat may be scavenged from an engine or exhaust of a tractor to which the sprayer is attached. In another embodiment, heat may be scavenged from a PTO-driven pump mounted to the chassis of a trailed sprayer.
- In summary, an agricultural crop sprayer may include a product tank for holding a solution of plant protection product, a product dispense system, and a rinse tank for holding a rinse fluid. A plumbing network fluidly connects the product tank, the product dispense system, and the rinse tank. A heat source is provided to heat the rinse fluid. The heat source may be a prime mover or a hydraulic pump from which waste heat is scavenged.
- It should be emphasized that the above-described embodiments of the present disclosure are merely possible examples of implementations, merely set forth for a clear understanding of the principles of the disclosure. Many variations and modifications may be made to the above-described embodiment(s) of the disclosure without departing substantially from the spirit and principles of the disclosure. All such modifications and variations are intended to be included herein within the scope of this disclosure and protected by the following claims.
Claims (22)
1. An agricultural crop sprayer comprising:
a product tank configured to hold a solution of a plant protection product;
a product dispense system;
a rinse tank for holding a rinse fluid;
a first heat exchanger configured to transfer waste heat from a heat source; and
a plumbing network fluidly connecting the product tank, the product dispense system, and the rinse tank, wherein the plumbing network comprises a closed fluid circuit including the first heat exchanger.
2. The agricultural crop sprayer of claim 1 , wherein the heat source comprises a prime mover configured to drive the agricultural crop sprayer, wherein the first heat exchanger is configured to extract waste heat from the prime mover.
3. The agricultural crop sprayer of claim 1 , wherein the closed fluid circuit includes a second heat exchanger located inside the rinse tank.
4. The agricultural crop sprayer of claim 1 , wherein the first heat exchanger is fluidly connected to the rinse tank, and wherein the rinse fluid serves as a heat exchange medium.
5. The agricultural crop sprayer of claim 1 , further comprising a thermostat configured to regulate the temperature of the rinse fluid.
6. The agricultural crop sprayer of claim 1 , further comprising a flow control valve in communication with an electronic controller, wherein the flow control valve is controllable by the electronic controller to regulate a temperature of the rinse fluid.
7. The agricultural crop sprayer of claim 2 , wherein the prime mover comprises an internal combustion engine.
8. The agricultural crop sprayer of claim 1 , wherein the agricultural crop sprayer comprises a self-propelled crop sprayer.
9. The agricultural crop sprayer of claim 2 , further comprising wheels that derive a driving torque from the prime mover.
10. The agricultural crop sprayer of claim 1 , wherein the heat source comprises a hydraulic system, wherein the first heat exchanger is configured to transfer waste heat from the hydraulic system to the rinse fluid.
11. The agricultural crop sprayer of claim 10 , wherein the hydraulic system comprises a hydraulic pump configured to generate a source of pressurized hydraulic fluid, and wherein the hydraulic pump provides the heat source.
12. The agricultural crop sprayer of claim 1 , further comprising a cold rinse tank connected to the plumbing network.
13. The agricultural crop sprayer of claim 12 , further comprising a controller configured to control the plumbing network, wherein the controller is configured to selectively activate a rinse process in which the rinse tank is put into fluid communication with one of the product tank and the product dispense system before the cold rinse tank is put into fluid communication with said one of the product tank and the product dispense system.
14. (canceled)
15. (canceled)
16. A method of operating an agricultural crop sprayer, the crop sprayer comprising a product tank configured to hold a solution of plant protection product, a product dispense system, a rinse tank for holding a rinse fluid, a first heat exchanger configured to transfer waste heat from a heat source, and a plumbing network fluidly connecting the product tank, the product dispense system, and the rinse tank, wherein the plumbing network comprises a closed fluid circuit including the first heat exchanger, the method comprising:
heating the rinse fluid with waste heat from the heat source to a temperature above an ambient temperature; and
conveying the heated rinse fluid from the rinse tank to at least one of the product tank and the product dispense system.
17. The method of claim 16 , wherein the crop sprayer further comprises a cold rinse tank, and wherein the method further comprises, after conveying the heated rinse fluid, conveying fluid at approximately the ambient temperature from the cold rinse tank to at least one of the product tank and the product dispense system.
18. A method of operating an agricultural crop sprayer comprising a product tank, a product dispense system, and a rinse tank, the method comprising:
propelling the agricultural crop sprayer through a field;
heating a rinse fluid carried by the rinse tank with waste heat from a heat source to a temperature above an ambient temperature by circulating a heat exchange fluid in a closed fluid circuit including a first heat exchanger; and
conveying the heated rinse fluid through a plumbing network from the rinse tank to at least one of the product tank and the product dispense system.
19. The method of claim 18 , wherein heating a rinse fluid carried by the rinse tank comprises circulating the heat exchange fluid through an internal combustion engine.
20. The method of claim 18 , wherein heating a rinse fluid carried by the rinse tank comprises circulating the rinse fluid as the heat exchange fluid.
21. The method of claim 18 , wherein heating a rinse fluid carried by the rinse tank comprises circulating the heat exchange fluid through the first heat exchanger and a second heat exchanger, wherein the second heat exchanger is inside the rinse tank.
22. The method of claim 18 , wherein heating a rinse fluid carried by the rinse tank comprises circulating the heat exchange fluid adjacent a hydraulic pump.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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GB1820704.3 | 2018-12-19 | ||
GBGB1820704.3A GB201820704D0 (en) | 2018-12-19 | 2018-12-19 | Agricultural sprayer with warm water rinse system |
PCT/EP2019/082874 WO2020126386A1 (en) | 2018-12-19 | 2019-11-28 | Agricultural sprayer with warm water rinse system |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2019/082874 A-371-Of-International WO2020126386A1 (en) | 2018-12-19 | 2019-11-28 | Agricultural sprayer with warm water rinse system |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US18/522,645 Division US20240091829A1 (en) | 2018-12-19 | 2023-11-29 | Agricultural Sprayer with Warm Water Rinse System |
Publications (1)
Publication Number | Publication Date |
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US20220016680A1 true US20220016680A1 (en) | 2022-01-20 |
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ID=65146965
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US17/413,823 Abandoned US20220016680A1 (en) | 2018-12-19 | 2019-11-28 | Agricultural sprayer with warm water rinse system |
US18/522,645 Pending US20240091829A1 (en) | 2018-12-19 | 2023-11-29 | Agricultural Sprayer with Warm Water Rinse System |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US18/522,645 Pending US20240091829A1 (en) | 2018-12-19 | 2023-11-29 | Agricultural Sprayer with Warm Water Rinse System |
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US (2) | US20220016680A1 (en) |
EP (1) | EP3897123A1 (en) |
BR (1) | BR112021004668A2 (en) |
GB (1) | GB201820704D0 (en) |
WO (1) | WO2020126386A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2474354A1 (en) * | 1980-01-25 | 1981-07-31 | Kaercher Gmbh & Co Alfred | High pressure cleaning device using hot water jet - has electric heating element in chamber divided off from main boiler |
US6364010B1 (en) * | 2000-06-02 | 2002-04-02 | The Consortium For Technology Licensing, Ltd. | Device to provide heated washer fluid |
CN207927656U (en) * | 2018-03-14 | 2018-10-02 | 杨颖� | A kind of motor-driven spray truck |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8711752U1 (en) * | 1987-08-29 | 1987-10-22 | Maschinenfabrik Rau Gmbh, 7315 Weilheim | Sprayer |
US9045039B2 (en) * | 2011-04-21 | 2015-06-02 | ET Works, LLC | Hydraulic reservoir assembly for a crop sprayer |
US9238239B2 (en) * | 2011-06-08 | 2016-01-19 | Pure Maintenance | Atomizing sterilization of a plurality of cleaning agents |
-
2018
- 2018-12-19 GB GBGB1820704.3A patent/GB201820704D0/en not_active Ceased
-
2019
- 2019-11-28 US US17/413,823 patent/US20220016680A1/en not_active Abandoned
- 2019-11-28 EP EP19813460.3A patent/EP3897123A1/en active Pending
- 2019-11-28 BR BR112021004668-2A patent/BR112021004668A2/en unknown
- 2019-11-28 WO PCT/EP2019/082874 patent/WO2020126386A1/en unknown
-
2023
- 2023-11-29 US US18/522,645 patent/US20240091829A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2474354A1 (en) * | 1980-01-25 | 1981-07-31 | Kaercher Gmbh & Co Alfred | High pressure cleaning device using hot water jet - has electric heating element in chamber divided off from main boiler |
US6364010B1 (en) * | 2000-06-02 | 2002-04-02 | The Consortium For Technology Licensing, Ltd. | Device to provide heated washer fluid |
CN207927656U (en) * | 2018-03-14 | 2018-10-02 | 杨颖� | A kind of motor-driven spray truck |
Non-Patent Citations (4)
Title |
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CN207927656 - Machine Translation (Year: 2018) * |
DE8711752 - Machine Translation (Year: 1987) * |
EP2617286 - Machine Translation (Year: 2013) * |
FR2474354 - Machine Translation (Year: 1981) * |
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BR112021004668A2 (en) | 2021-06-01 |
US20240091829A1 (en) | 2024-03-21 |
GB201820704D0 (en) | 2019-01-30 |
EP3897123A1 (en) | 2021-10-27 |
WO2020126386A1 (en) | 2020-06-25 |
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