Patent Application
20220134367
The present invention relates to systems and methods for spraying chemical mixtures; more particularly, to systems and methods for spraying chemical mixtures from a portable apparatus; and most particularly, to a portable chemical sprayer system operative at ambient atmospheric pressure wherein the sprayer apparatus is mountable on a conventional bucket defining a principal reservoir for a carrier fluid, e.g., water, and comprises at least one and preferably a plurality of auxiliary chemical reservoirs, a valve for selecting which reservoirs are to be used, a Venturi tube for siphoning and combining flow streams from the auxiliary reservoirs with the flow of carrier fluid, and an electric pump that may be powered by either an onboard rechargeable battery or a 110-volt AC outlet.
The present invention is directed to the art of manually spraying chemicals from a portable reservoir, e.g., a 5-gallon bucket. A system in accordance with the present invention is especially useful in cleaning the coils and housing of an air handling system such as a mini-split wall-mounted air conditioning (A/C) unit.
In the prior art, U.S. Pat. No. 7,513,444 B1, issued Apr. 7, 2009, discloses an apparatus for attachment to a bucket for holding a liquid, the bucket having an upper rim. A bail is pivotally attached to the bucket as in a conventional arrangement, the bail having an upper position and a lower position. The apparatus has a housing with a pump operatively attached thereto, the pump having an inlet in liquid communication with the bucket and an outlet for facilitating the pumping of liquid from the bucket, preferably through a spray wand with a nozzle at the outlet thereof. A member is pivotally attached to the housing at one end thereof and has a notch in another portion thereof. This member has at least a first pivotal position and a second pivotal position. When the housing is on the rim, the bail is in the upper position thereof and the member is in the first pivotal position thereof so that a portion of the bail is in the notch for thereby holding the housing to the upper rim of the bucket. The pivoting member can also hold a rechargeable battery securely in place in the first position of the member. This apparatus thereby permits a user to purchase a liquid to be sprayed in a bucket and then attach the present invention thereto to spray the liquid contents of the bucket as desired, thereby obviating both the need to transfer the liquid to a sprayer tank and the need for an extension cord for electricity.
The disclosed apparatus lacks at least one or a plurality of auxiliary chemical reservoirs or a mixing valve for selectively spraying the contents of one or more of the reservoirs in combination with a liquid in the bucket. Further, the disclosed apparatus is powered by an onboard 12-volt battery and is not equipped to be operated from a 110-volt AC outlet in the event the battery loses its charge during storage or use.
US Patent Application Publication No. 2013/0001243, published Jan. 3, 2013, discloses a portable water station including a container or bucket with a flat bottom, a sidewall, and a top cover or lid. An electric pump resides within the bucket. A rechargeable battery is provided on the top of the lid and is electrically connected to the pump. A pipe is connected to the pump and extends through the lid and terminates in a spigot for dispensing water from the bucket when the battery switch is turned on. A valve on the pipe can be opened and closed to control water flow from the spigot. A soap dispenser is also provided on the lid.
The disclosed apparatus lacks any capability of mixing one or more chemicals in varying amounts with the contents of the bucket. Further, the disclosed apparatus is powered by an onboard 12-volt battery and is not equipped to be operated from a 110-volt AC outlet in the event the battery loses its charge during storage or use.
U.S. Pat. No. 9,266,152 B1, issued Feb. 23, 2016, discloses an apparatus for cleaning coils and fins of outdoor condenser units and the like in locations without electrical service wherein the apparatus comprises containers for water and cleaning chemical, a plumbing system for preparing and delivering a cleaning mixture, an electrical system for power, and wherein the method provides for cleaning coils by directing cleaning mixture through the coils in counter-flow to cooling air drawn through the coils by a condenser unit fan.
The disclosed apparatus is powered by an onboard 12-volt battery and is not equipped to be operated from a 110-volt AC outlet in the event the battery loses its charge during storage or use. Further, the apparatus is incapable of pumping fluid directly from a vended container such as a 5-gallon bucket.
U.S. Pat. No. 9,381,549, issued Jul. 5, 2016, discloses a system for descaling heat exchanger surfaces using an acidic solution, the system comprising a portable machine of container and cover with operating components including motor driven circulating pump, hose fittings, directional valve, fluid openings, housing and hatch mounted on reinforced cover.
The disclosed apparatus lacks a plurality of separate chemical reservoirs or a mixing valve for selectively spraying the contents of one or more of the reservoirs in combination with a liquid in the bucket. Further, the disclosed apparatus is powered solely from a 110-volt AC outlet with no provision for battery operation.
What is needed is a system for spraying fluids that includes: a) a principal reservoir for holding a carrier fluid; b) an electric pump in communication with the principal reservoir; c) a power source for energizing the pump selectable between a rechargeable 12-volt battery and a 110-volt AC line; d) at least one auxiliary reservoir for holding an auxiliary fluid to be controllably mixed with carrier fluid being drawn from the principal reservoir; e) a selector valve for selecting which if any of the auxiliary fluid(s) are to be combined with the carrier fluid; f) a Venturi tube for siphoning and combining streams of carrier fluid and selected auxiliary fluid(s) in a predetermined ratio which may be varied as desired; and g) a spray wand in fluid communication with the Venturi tube for discharging the selected fluids.
The present invention is directed to an improved system and method for mixing and spraying liquid chemicals from a portable reservoir, e.g., a 5-gallon bucket. A currently preferred embodiment comprises a principal reservoir for holding a carrier fluid; an electric pump in communication with the principal reservoir; a power source for energizing the pump selectable between a rechargeable 12-volt battery and a 110-volt AC line; at least one auxiliary reservoir for holding an auxiliary fluid to be controllably mixed with carrier fluid being drawn from the principal reservoir; a selector valve for selecting which if any of the auxiliary fluid(s) are to be combined with the carrier fluid; a Venturi tube for combining streams of carrier fluid and selected auxiliary fluid(s) in a predetermined ratio which may be varied as desired; and a spray wand in fluid communication with the Venturi tube for discharging the selected fluids.
The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Throughout the following description, specific elements are set forth to provide a more thorough understanding of the invention. However, in some embodiments the invention may be practiced without some of these elements. In other instances, well known elements have not been shown or described in detail to avoid unnecessarily obscuring the disclosure. Accordingly, the specification and drawings are to be regarded as illustrative rather than restrictive. It is to be further noted that the drawings may not be to scale.
Referring now to
System 10 comprises: a principal reservoir 12 for holding a carrier fluid 14; a non-submersible electric pump 16 in hydraulic communication with principal reservoir 12 and carrier fluid 14; a power source for energizing pump 16 selectable between a rechargeable 12-volt battery 18 and a 110-volt AC line 20 and AC/DC transformer 22; an on/off power switch 23; at least one auxiliary reservoir 24a,24b for holding at least one auxiliary fluid 26a,26b to be controllably mixed with carrier fluid 14 being drawn from principal reservoir 12 by pump 16; a selector valve 28 for selecting auxiliary fluids 26a or 26b or neither or both in a combination thereof in a first predetermined ratio which may be varied as desired; a siphon apparatus 30, e.g., a Venturi tube, for siphoning and combining selected auxiliary fluids 26a,26b with carrier fluid 14 in a second predetermined ratio; and a spray wand 32 in fluid communication with Venturi tube 30 for discharging the combination of fluids. The flow rate of auxiliary fluid 26a preferably is governed by a fixed orifice 36 in the flow path, although a variable orifice may be employed if desired. The flow rate of auxiliary fluid 26b preferably is governed by a variable orifice 38, e.g., a needle valve.
Referring now to
Preferably, battery 18 is rechargeable and replaceable, being removably mounted. On/off power switch 123 controls power to pump 116 as desired by an operator. At least one auxiliary reservoir 124a is mounted on structure 117 for holding and supplying at least one auxiliary fluid 126a to be controllably mixed with carrier fluid 114 being drawn from principal reservoir 112 by pump 116. In a currently preferred embodiment 110, a second auxiliary reservoir 124b is provided for holding a supplying a second auxiliary fluid 126b. A three-way valve 128 selects auxiliary fluids 126a or 126b, or neither, or both in a combination thereof in a first predetermined ratio which may be varied as desired. The flow rate of auxiliary fluid 126a preferably is governed by a fixed orifice (not visible) in the flow path. The flow rate of auxiliary fluid 126b preferably is governed by a variable orifice 138, e.g., a needle valve controlled manually by an operator. A Venturi tube 130 is disposed in the flow path of output from pump 116 for siphoning the selected and regulated flows of auxiliary fluids 126a,126b from first and second auxiliary reservoirs 124a,124b, and then combining such flows with the flow of carrier fluid 114 in a second predetermined ratio. A spray wand 132 in fluid communication with Venturi tube 130 discharges the combination of fluids.
Cover part 117b includes first and second cleat brackets 132a,132b around which sprayer hose 134 may be wrapped for storage, as shown in
Referring to
In operation of embodiment 110 for, e.g., cleaning a target, such as a mini-split air conditioning unit, an operator fills first reservoir 112 with carrier fluid 114, e.g., water or a cleaning solution, fills first and second auxiliary reservoirs 124a,124b with first and second auxiliary fluids 126a,126b, which may be, for example, a cleaning solvent and a mold inhibitor. The operator checks the battery 118 for charge and if necessary, plugs in transformer 122 to electric outlet 120. The operator connects the hose 134 to a spray wand 132 and to hose outlet 138. The operator sets the position of selector switch 128 to deliver one or both of auxiliary fluids 126a,126b in the desired combination of flows of carrier and auxiliary fluids. The system is now ready for operation. The operator engages switch 123 which energizes pump 116, drawing carrier fluid 114 from reservoir 112. The pumped carrier fluid passes through Venturi tube 130, siphoning the set flows of auxiliary fluids 126a,126b into combination with the set flow of carrier fluid 114 in a predetermined ratio. The combination is passed through spray wand 134, exiting system 110. When cleaning is complete, the operator may, for example, turn selector switch 128 to turn off flow of both auxiliary fluids 126a,126b so the system then delivers only carrier fluid 114, e.g., water, which may be used to flush the cleaning target of debris and cleaning fluids.
Referring now to
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Referring now to
While the invention has been described by reference to various specific embodiments, it should be understood that numerous changes may be made within the spirit and scope of the inventive concepts described. Accordingly, it is intended that the invention is not limited to the described embodiments, but will have full scope defined by the language of the following claims.
