Beverage dispensing apparatus with a refrigerated dispensing tube bundle and a method of cooling beverage fluids

Abstract

Beverage dispensing apparatus, systems, and related methods are provided that have a recirculation loop to cool fluids in a dispensing tube bundle that delivers beverage fluids to a beverage dispensing assembly. A beverage dispensing apparatus includes an adjustable bypass manifold having an adjustable flow restriction that is configurable to enable the use of the beverage dispensing apparatus with different chilled soda recirculation systems. The adjustable bypass manifold includes ports for connection to the recirculation loop and ports for connection to a soda recirculation system.

Claims

1. A method for cooling beverage fluids in supply lines conveying the beverage fluids to a dispensing assembly, the method comprising: receiving a first flow of a cooling fluid from a cooling fluid source; dividing the first flow of the cooling fluid into a second flow and a third flow by using an adjustable flow restriction to control a flow rate of the third flow, the adjustable flow restriction having an open position and a closed position, the flow rate of the third flow being greater than zero at both the open position and the closed position of the adjustable flow restriction; circulating the second flow of the cooling fluid through a recirculation loop; and returning at least a portion of the third flow to the cooling fluid source without circulating the third flow through the recirculation loop.

2. The method of claim 1, further comprising absorbing heat into the cooling fluid in the recirculation loop to cool the beverage fluids in the supply lines.

3. The method of claim 1, further comprising dispensing a portion of the first flow of the cooling fluid from the dispensing assembly, the cooling fluid being a beverage fluid.

4. The method of claim 1, further comprising controlling a flow rate of the second flow of the cooling fluid through the recirculation loop via a valve assembly to inhibit formation of condensation.

5. The method of claim 4, further comprising maintaining the flow rate of the second flow at approximately 5 ml per second via a dynamic flow regulator coupled to the valve assembly.

6. The method of claim 4, further comprising maintaining the flow rate of the second flow at approximately 5 ml per second via a flow restrictor coupled to the valve assembly.

7. The method of claim 1, further comprising maintaining a flow rate of the second flow at a substantially constant flow rate via a flow restrictor.

8. The method of claim 7, wherein the flow rate of the second flow of the cooling fluid through the recirculation loop is approximately 5 ml per second.

9. The method of claim 1, further comprising maintaining a flow rate of the second flow at a substantially constant flow rate via a dynamic flow regulator.

10. The method of claim 9, wherein the flow rate of the second flow of the cooling fluid through the recirculation loop is approximately 5 ml per second.

11. The method of claim 1, wherein a flow rate of the first flow is 50 to 100 gallons per hour at a supply pressure of 75 psi to 110 psi when the adjustable flow restriction is in the open position.

12. The method of claim 1, wherein a flow rate of the first flow is 5 to 10 gallons per hour at a supply pressure of 50 psi to 75 psi when the adjustable flow restriction is in the closed position.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view illustrating an existing beverage dispensing apparatus that includes a recirculation loop located upstream of a dispensing valve and manifold assembly.

(2) FIG. 2 is a perspective view illustrating an existing beverage dispensing system apparatus that includes a recirculation loop that extends to a dispensing bar gun.

(3) FIGS. 3A and 3B illustrate an existing dispensing bar gun that includes a recirculation loop that is machined into a layer of the bar gun.

(4) FIGS. 4A, 4B, and 4C illustrate an existing dispensing bar gun that includes a recirculation loop that is molded into a handle member of the bar gun.

(5) FIG. 5 is a perspective view illustrating a beverage dispensing apparatus that includes an adjustable bypass manifold, in accordance with many embodiments.

(6) FIG. 6 is a perspective view illustrating an adjustable bypass manifold coupled to a dispensing valve and manifold assembly of a beverage dispensing apparatus, in accordance with many embodiments.

(7) FIGS. 7A through 7D illustrate a welded adjustable bypass manifold that includes an adjustable restriction member, the adjustable restriction member being in a closed position, in accordance with many embodiments.

(8) FIGS. 8A through 8D illustrate the welded adjustable bypass manifold of FIG. 7A with the adjustable restriction member in an open position, in accordance with many embodiments.

(9) FIGS. 9A through 9C illustrate a restriction member of an adjustable bypass manifold, in accordance with many embodiments.

(10) FIGS. 10A through 10F illustrate a built-up molded or machined plastic adjustable bypass manifold, in accordance with many embodiments.

(11) FIG. 11 is an exploded perspective view illustrating the built-up adjustable manifold of FIG. 10A.

(12) FIG. 12A is a simplified diagram listing acts of a method for cooling beverage fluids in supply lines conveying the beverage fluids to a dispensing assembly, in accordance with many embodiments.

(13) FIG. 12B is a simplified diagram listing optional acts that can be accomplished in the method of FIG. 12A, in accordance with many embodiments.

(14) FIG. 13 is a perspective view of a beverage dispensing apparatus that employs a dynamic flow regulator to maintain a consistent flow rate of a re-circulated cooling fluid, in accordance with many embodiments.

(15) FIG. 14 is a perspective view of a valve and manifold assembly having a flow restrictor to maintain a consistent flow rate of a re-circulated cooling fluid, in accordance with many embodiments.

DETAILED DESCRIPTION

(16) In the following description, various embodiments of the present invention will be described. For purposes of explanation, specific configurations and details are set forth in order to provide a thorough understanding of the embodiments. However, it will also be apparent to one skilled in the art that the present invention may be practiced without the specific details. Furthermore, well-known features may be omitted or simplified in order not to obscure the embodiment being described.

(17) Adjustable Bypass Manifold

(18) Referring now to the drawings, in which like reference numerals represent like parts throughout the several views, FIG. 5 shows a beverage dispensing apparatus 60 that includes an adjustable bypass manifold 62, in accordance with many embodiments. The beverage dispensing apparatus 60 further includes a dispenser (e.g., bar gun 64), a dispensing valve and manifold assembly 66, and a dispensing tube bundle 68.

(19) The adjustable bypass manifold 62 includes inlets and outlets for the receipt and discharge of flows of a cooling fluid. These inlets and outlets include a cooling fluid supply inlet 70 that receives a flow of the cooling fluid, a recirculation loop supply outlet 72 that discharges a flow of the cooling fluid to a recirculation loop 74 that extends to the bar gun 64, a cooling fluid supply outlet 76 that discharges a flow of the cooling fluid through the dispensing valve and manifold assembly 66 to the bar gun 64 for dispensing from the bar gun 64, a cooling fluid return inlet 78 receiving returning cooling fluid from the recirculation loop 74, and a cooling fluid return outlet 80 that discharges cooling fluid that is subsequently re-circulated through, for example, additional dispensing subassemblies and/or back through the cooling fluid source employed (e.g., a refrigerated re-circulating carbonator, a cooling plate system).

(20) In many embodiments, the recirculation loop 74 serves to cool beverage fluids in the dispensing tube bundle 68 by absorbing heat into the cooling fluid being circulated through the recirculation loop 74. The dispensing tube bundle 68 includes a plurality of fluid lines, two of which are used to form part of the recirculation loop 74. The bar gun 64 includes a recirculation loop portion 82 that completes the recirculation loop 74. The dispensing tube bundle 68 can include an exterior sheath with some heat insulating capability to inhibit heat transfer from the surrounding ambient environment into the beverage fluids in the fluid lines, thereby further serving to help maintain the beverage fluids in the fluid lines in a chilled state.

(21) The adjustable bypass manifold 62 includes an adjustable restriction member 84 that can be positioned to vary bypass flow characteristics of the bypass manifold 62. In operation, a portion of the flow of cooling fluid received into the bypass manifold 62 via the cooling fluid supply inlet 70 is transferred directly through the adjustable restriction member 84 to be directly discharged from the cooling fluid return outlet 80. By adjusting a setting of the adjustable restriction member 84, different flow rates and supply pressures of the cooling fluid corresponding to particular sources of cooling fluid (e.g., a Vane Pump system operating at 50 to 100 gph at a supply pressure of 75 psi to 110 psi, a Mag Pump system operating at 5 to 10 gph at a supply pressure of 50 psi to 75 psi) can be accommodated. For example, with a Vane Pump system that is circulating 50 to 100 gph of chilled soda at a supply pressure of 75 psi to 110 psi, the adjustable restriction member 84 can be adjusted to a setting that provides an amount of restriction suitable to bypass a large portion of the 50 to 100 gph and routes a suitable flow rate of the cooling fluid (e.g., 5 ml per second) through the recirculation loop 74. With a Mag Pump system that is circulating 5 to 10 gph of chilled soda at a supply pressure of 50 to 75 psi, the adjustable restriction member 84 can be adjusted to a setting that provides an amount of restriction (increased restriction for the Mag Pump system as compared to the restriction for the Vane Pump system) suitable to route a suitable flow rate of the cooling fluid (e.g., 5 ml per second) through the recirculation loop 74, while bypassing the rest of the flow rate to be discharged directly from the cooling fluid return outlet 80 without being circulated through the recirculation loop 74.

(22) The dispensing valve and manifold assembly 66 controls the transfer of beverage fluids to the bar gun 64. The valve and manifold assembly 66 includes a row of fluid input ports 86, a corresponding row of flow control valves 88, and a corresponding row of flow controls 90. Each of the input ports 86 is in fluid communication with a corresponding output port of the manifold assembly 66 through a corresponding one of the flow control valves 88 and one of the corresponding flow controls 90, thereby providing a corresponding plurality of fluid flow channels through the valve and manifold assembly that individually control what rate a fluid flows through the individual flow channel when the corresponding valve in the handle 64 is opened. And each of the flow control valves 88 can be configured to control the flow of a fluid through the associated flow channel, for example, to prevent flow beyond the flow control valve during periods of disassembly and/or servicing. Any suitable flow restriction can be used, for example, fixed flow restrictions can be used, and adjustable flow restrictions can be used.

(23) In the beverage dispensing apparatus 60, two of the flow channels of the dispensing valve and manifold assembly 66 form part of the recirculation loop 74 that extends from the adjustable bypass manifold 62 to the bar gun 64. One of the flow channels receives a flow of the cooling fluid from the recirculation loop supply outlet 72 and transfers the fluid to a fluid line in the dispensing tube bundle 68 that forms part of the recirculation loop 74. And another one of the flow channels returns the re-circulating cooling fluid from a return fluid line in the dispensing tube bundle 68 that forms part of the recirculation loop 74, and transfers the returned cooling fluid to the cooling fluid return inlet 78 of the adjustable bypass manifold 62. The associated flow controls in the dispensing valve and manifold assembly 66 can be configured to control the flow rate at which the cooling fluid is circulated through the recirculation loop 74. Accordingly, the amount of cooling provided by the recirculation loop 74 can be controlled to provide a suitable amount of cooling without providing excessive cooling that may result in the formation of significant amounts of condensation.

(24) FIG. 6 shows the adjustable bypass manifold 62 coupled directly to the dispensing valve and manifold assembly 66. The row of fluid input ports 86 is configured to receive and couple with complementary shaped and spaced male fittings of the adjustable bypass manifold 62 corresponding to the recirculation supply outlet 72, the cooling fluid supply outlet 76, and the cooling fluid return inlet 78 (shown in FIG. 5). The valve and manifold assembly 66 includes retainer clips that are used to secure a male fitting with a corresponding fluid input port 86.

(25) The adjustable restriction member 84 is rotatable between a Vane position that provides a relatively small amount of restriction to fluid flow suitable for the relatively large flow rates of a Vane Pump system and a Mag Position that provides a relatively large amount of restriction to fluid flow suitable for the relatively small flow rates of a Mag Pump system. A locking screw 92 can be tightened onto the adjustable restriction member 84, thereby inhibiting relative rotation between the restriction member 84 and a welded main body 94 of the adjustable bypass manifold 62.

(26) FIGS. 7A through 7D show various views of the adjustable bypass manifold 66 with the adjustable restriction member 84 in the closed position (e.g., Mag Position). FIG. 7A shows a perspective view of the bypass manifold 66. FIG. 7B shows a plan view of the bypass manifold 66. FIG. 7C shows cross-sectional view AA as defined by FIG. 7B. And FIG. 7D shows cross-sectional view BB as defined by FIG. 7C.

(27) The bypass manifold 66 includes the welded main body 94, the adjustable restriction member 84, and the locking screw 92. The welded main body 94 includes the three male couplings (corresponding to the recirculation supply outlet 72, the cooling fluid supply outlet 76, and the cooling fluid return inlet 78), which are shaped to couple with three adjacent fluid input ports 86 of the valve and manifold assembly 66. The welded main body 94 further includes two male couplings (corresponding to the cooling supply inlet 70 and the cooling fluid return outlet 80), each of which includes directionally-biased serrated barbs configured to interface with a mating supply tubing to inhibit disengagement of the mating supply tubing from the male coupling.

(28) As shown in FIG. 7D, the welded main body 94 forms a cooling fluid supply duct 96, a cooling fluid return duct 98, and a transverse duct 100 connecting the supply duct 96 with the return duct 98. Each of the cooling fluid supply inlet 70 and the recirculation supply outlet 72 is in fluid communication with the supply duct 96. Each of the cooling fluid return inlet 78 and the cooling fluid return outlet 80 is in fluid communication with the return duct 98. And the cooling fluid supply outlet 76 is in fluid communication with the supply duct 96 through the cross duct 100. The adjustable restriction member 84 intersects the cross duct 100 such that the return duct 98 is in fluid communication with the supply duct 96 through the adjustable restriction member 84. A capping member 102 is used to close the end of the cross duct 100 after the cross duct 100 has been formed.

(29) The adjustable restriction member 84 includes an orifice 104 in an end portion of the restriction member 84. The orifice 104 is sized to provide for a controlled amount of minimum bypass flow rate of cooling fluid from the supply duct 96 to the return duct 98 when the adjustable restriction member 84 is in the closed position (i.e., the Mag Position) as shown in FIGS. 7A through 7D. While a circular orifice 104 is shown, the restriction member 84 can be configured in any other suitable way to provide for a controlled amount of minimum bypass flow rate suitable to the recirculation system used (e.g., a Mag Pump system). And as shown in FIG. 7C, a gap 106 between the restriction member 84 and the main body 94 provides an additional path for bypass of cooling fluid beyond that provided by the orifice 104. In many embodiments, the restriction member 84 includes external threads that engage an internally threaded hole in the main body 94. Different sizes of the gap 106 can be achieved by rotating the restriction member 84 by 180 degree increments relative to the main body, thereby adjusting the gap while still having the restriction member in the closed position as shown in FIGS. 7A through 7D. The different gap sizes can be used to adjust the minimum bypass flow rate.

(30) FIGS. 8A through 8D show various views of the adjustable bypass manifold 66 with the adjustable restriction member 84 in the open position (i.e., Vane Position). FIG. 8A shows a perspective view of the bypass manifold 66. FIG. 8B shows a plan view of the bypass manifold 66. FIG. 8C shows cross-sectional view AA as defined by FIG. 8B. And FIG. 8D shows cross-sectional view BB as defined by FIG. 8C.

(31) As shown in FIG. 8D, the three male couplings (corresponding to the recirculation supply outlet 72, the cooling fluid supply outlet 76, and the cooling fluid return inlet 78) can be separate elements that are then coupled to the body member 94, for example, by press-fitting, welding, brazing, or other suitable approach. Likewise, the two male couplings (corresponding to the cooling supply inlet 70 and the cooling fluid return outlet 80) can be separate members that are coupled to the body member 94.

(32) In the open position, the end portion of the restriction member 84 is oriented in alignment with the cross duct 100. In the open position, the blockage of the cross duct 100 by the restriction member 84 is minimized so as to maximize the resulting amount of bypass flow.

(33) FIGS. 9A through 9C show various views of the adjustable restriction member 84. FIG. 9A shows a perspective view of the restriction member 84. FIG. 9B shows a side view of the restriction member 84 illustrating the orifice 104 in the end portion of the restriction member 84. And FIG. 9C shows a side view of the restriction member 84 further illustrating the end portion of the restriction member 84.

(34) The adjustable restriction member 84 includes a cylindrically-shaped top portion 106 having external threads 108, a center portion 110 having a seal recess 112 shaped to interface with and retain an o-ring seal 114, and the fin-shaped end portion 116 having the orifice 104. A slot 118 is located in a top surface of the top portion 106. In many embodiments, the top, center, and end portions 106, 110, 116 are formed as a monolithic part, for example, by molding, by machining, or by any other suitable known approach.

(35) The adjustable restriction member 84 is installed into a receptacle in the main body 94. The receptacle is perpendicular to and intersects the cross duct 100. The receptacle has a cylindrical configuration. A top portion of the receptacle includes internal threads that interface with the external threads 108 of the restriction member 84. The o-ring seal 114 interfaces with a cylindrical inner surface of the receptacle, thereby sealing between the restriction member 84 and the main body 94.

(36) FIG. 10A through FIG. 11 illustrates another adjustable bypass manifold 120, in accordance with many embodiments. The bypass manifold 120 is similar to the bypass manifold 66 described above, but includes coupling fittings 122, 124 having o-ring seals 126, a close-out cap 128 having an o-ring seal 130, and screws 132 to retain the coupling fittings 124 and the close-out cap 128 to a main body 134 of the bypass manifold 120. The coupling fittings 122 can be retained to the main body by a suitable method, for example, by press-fitting, by bonding, or any other suitable method such as the use of screws to retain the coupling fittings to the main body 134.

(37) The beverage dispensing apparatus described herein can be aggregated to form a beverage dispensing system in which multiple beverage dispensers are serviced by a single cooling fluid source, such as chilled soda water from a vane pump driven refrigerated re-circulating carbonator. In such a system, each of the adjustable bypass manifolds is in fluid communication with a recirculation line carrying the cooling fluid and circulating the cooling fluid through a cooler.

(38) FIG. 12A is a simplified diagram listing acts of a method 140 for cooling beverage fluids in supply lines conveying the beverage fluids to a dispensing assembly, in accordance with many embodiments. The beverage dispensing apparatus described herein can be used to practice the method 140. The method 140 includes receiving a first flow rate of a cooling fluid from a cooling fluid source (act 142). The first flow rate of the cooling fluid is divided into a second flow rate and a third flow rate by using an adjustable flow restriction to control the third flow rate, the third flow rate being greater than zero (act 144). The second flow rate of the cooling fluid is circulated through a recirculation loop (act 146). And at least a portion of the third flow rate is returned to the cooling fluid source without circulating the third flow rate through the recirculation loop (act 148).

(39) FIG. 12B is a simplified diagram listing optional acts that can be added to the method 140, in accordance with many embodiments. These optional acts include absorbing heat into the cooling fluid in the recirculation loop to cool the beverage fluids in the supply lines (act 150); and dispensing a portion of the first flow rate of the cooling fluid from the dispensing assembly, the cooling fluid being a beverage fluid (act 152).

(40) Condensation Control

(41) It was discovered that insulating the dispensing valve and manifold assembly 66 and the dispensing tube bundle 68 may not be sufficient in isolation to inhibit the formation of condensation to an extent desired. Refrigerated re-circulating carbonators typically produce and maintain soda at about 34 F. Although extensive research was conducted into insulation technology, it was discovered that the thickness of insulation required to insulate the dispensing tube bundle 68 to prevent condensation from forming on the dispensing tube bundle 68 would result in a dispensing tube bundle of excessive diameter and stiffness, which would make the dispensing tube bundle unwieldy for the end-user. Research was then conducted into methods for moderating the flow rate of the 34 F. soda through the recirculation loop 74. As a result of this research, two separate methods were identified that allow sufficient chilled soda to flow through the recirculation loop 74 to maintain soda, water, and syrup temperatures at a nominal 36 F., even in environments with humidity levels ranging all the way up to 90% and ambient surrounding air temperatures of up to 90 F.

(42) Dynamic Flow Control

(43) Referring to FIG. 13, the first method involves the use of a dynamic flow regulator 154 preset to maintain a consistent soda flow rate through the recirculation loop 74 of a magnitude suitable to provide sufficient cooling while also sufficiently inhibiting the formation of condensation (e.g., 5 ml per second). The dynamic flow regulator 154 is positioned in the valve and manifold assembly 66 at the inlet of the chilled soda and is then adjusted to desired flow rate (e.g., 5 ml per second). The dynamic flow regulator 154 is used is to actively compensate for variations in soda flow rates, especially when the dispenser is installed on a multiple dispenser system. The dispensing apparatus configuration shown in FIG. 13 can be used with soda recirculation systems that use a refrigerated Vane pump carbonator. When used with such a Vane Pump carbonator, a simpler, less expensive H by-pass fitting assembly 156 can also be employed, along with a Wunder-Bar Dual Water Input Fitting 158, which is employed to spit the incoming soda off to the soda recirculation loop 74 and to an inlet for soda to be used for beverages. The H by-pass fitting assembly 156 includes a cross duct 160. In many embodiments, the cross duct 160 is configured to generate a sufficient pressure drop necessary to generate a desired flow rate of chilled water through the recirculation loop 74, while still providing a desired by-pass flow rate.

(44) Flow Restrictor

(45) Referring to FIG. 14, the second method involves the use of a flow restrictor 162 in the valve and manifold assembly 66 to restrict the flow rate of the chilled soda through the recirculation loop to a consistent flow rate selected to provide sufficient cooling while also limited to sufficiently inhibit the formation of condensation (e.g., 5 ml per second). The second method can be used with beverage dispensers equipped with the adjustable bypass manifold 62. For beverage dispensers equipped with the adjustable bypass manifold 62, it may not be possible to use a dynamic flow regulator due to the reduced pressure generated in Magnetic Pump driven recirculation systems. In many embodiments, the flow restrictor 162 is configured as an insert fitting having an orifice configured to restrict the flow rate of the chilled soda through the recirculation loop to the desired consistent flow rate (e.g., 5 ml per second).

(46) Other variations are within the spirit of the present invention. Thus, while the invention is susceptible to various modifications and alternative constructions, certain illustrated embodiments thereof are shown in the drawings and have been described above in detail. It should be understood, however, that there is no intention to limit the invention to the specific form or forms disclosed, but on the contrary, the intention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the invention, as defined in the appended claims.

(47) The use of the terms a and an and the and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms comprising, having, including, and containing are to be construed as open-ended terms (i.e., meaning including, but not limited to,) unless otherwise noted. The term connected is to be construed as partly or wholly contained within, attached to, or joined together, even if there is something intervening. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., such as) provided herein, is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.

(48) Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. Variations of those preferred embodiments may become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise indicated herein or otherwise clearly contradicted by context.