JP2021059342A - Beverage supply nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a beverage supply nozzle capable of securing a predetermined discharge time while suppressing a decrease in gas volume due to a pressure reducing unit. SOLUTION: This is a beverage supply nozzle NZ that discharges high-pressure carbonated water after decompressing it by a resistor 2 having a multi-layer structure arranged inside a tubular body 1, and is a high-pressure introduced from a carbonated water introduction member 3. In order to prevent the resistor 2 from moving downward due to the action of the carbonated water, the outermost resistor (outer resistor 21) of the hollow tubular body 1 and the multi-structured resistor 2 is located on the outermost side in the radial direction. ), A stopper 1a is provided as a lowering prevention means for preventing the resistor (outer resistor 21) from descending, and the stopper 1a prevents the resistor 2 from descending. [Selection diagram] Fig. 1

Description

The present invention relates to a beverage supply nozzle in a beverage supply device such as a beverage dispenser and a cup-type vending machine, and more particularly to a beverage supply nozzle that discharges carbonated water generated inside the beverage supply device.

For example, in a beverage dispenser that sells a mixture of one syrup selected from a plurality of different types of syrup (concentrate) and diluted water such as carbonated water and cold water, cold water and carbon dioxide gas are contained inside the beverage dispenser. Is provided with a carbonator that produces carbonated water by mixing the above, and the carbonated water produced by this carbonator is configured to be poured out from a beverage supply nozzle into a beverage container. A conventional example of this type of beverage supply nozzle is shown in FIG. 8, and FIG. 8 is a schematic view showing a flow path system to which the beverage supply nozzle is applied and a cross section of the beverage nozzle.

As shown in FIG. 8, the conventional beverage supply nozzle 100 includes a hollow tubular body 101 and a resistor 102 inserted inside the tubular body 101, and the tubular body 101 and the resistor 102 are made of synthetic resin. It becomes a molded product of. A carbonated water introduction member 103 having a function of a lid member is attached to the upper end of the tubular body 101, while the lower end is formed as a discharge port 104. Further, in the intermediate region of the tubular body 101, a cold water introduction path 105 is formed so as to project in the outer diameter direction, and a net 106 as a filter member is arranged inside. The resistor 102 is formed as a solid polygonal column having a polygonal columnar body having a polygonal cross section (for example, a dodecagon) and a head projecting in a conical shape. The resistor 102 is inserted into the hollow portion of the tubular body 101 so that each corner of the polygonal column is in contact with the inner wall surface of the tubular body 101, whereby the flat surface portion of the resistor 102 of the polygonal column and the tubular body 101 A gap (pressure / depressurizing portion) is formed between the cylindrical inner wall surface and the inner wall surface. In this way, a plurality of gaps as the pressure reducing portion are formed in the circumferential direction of the cross-sectional circle. The carbonated water introduction member 103 is configured to supply carbonated water generated by mixing cold water and carbon dioxide gas by a carbonator 107 via a solenoid valve V1, and the cold water introduction path 105 is supplied from a city water supply. The tap water is cooled through the cooling water tank, and the cold water is supplied via the solenoid valve V2.

In such a configuration, when the carbonated beverage-based beverage selection button provided on the operation panel of the beverage dispenser is pressed, the solenoid valve V1 is excited at a predetermined timing, and carbon dioxide generated by mixing cold water and carbon dioxide gas by the carbonator 107 is generated. Water is pumped to the carbonated water introduction member 103. The carbonated water pumped to the carbonated water introduction member 103 is evenly dispersed along the conical head of the resistor 102 and then formed between the flat surface portion of the resistor 102 and the inner wall surface of the tubular body 101. It passes through the gap and is discharged from the discharge port 104. When the non-carbonated beverage selection button provided on the operation panel of the beverage dispenser is pressed, the solenoid valve V2 is excited at a predetermined timing, and cold water is excited from the protrusion 104 of the tubular body 101 via the cold water introduction path 105. Is discharged (for example, Patent Document 1). According to the invention disclosed in Patent Document 1, the carbonated water pumped to the carbonated water introduction material 103 has a gap formed between the flat surface portion of the polygonal column of the resistor 102 and the inner wall surface of the tubular body 101. Since the pressure is reduced when passing through the water, it is possible to prevent a decrease in gas volume due to the separation of carbon dioxide gas. In addition, the head of the resistor 102 is formed in a conical shape, so that the carbonated water is a resistor. When it collides with the head of 102, it disperses around without generating a vortex and is guided to the gap (pressure reducing part), so that the separation of carbon dioxide gas generated by the generation of the vortex can be suppressed. Are better.

By the way, the smaller the gap (pressure reducing portion) formed between the flat surface portion of the polygonal prism in the resistor 102 and the inner wall surface of the tubular body 101, the lower the gas volume due to the separation of carbon dioxide gas when carbonated water passes. Therefore, it is possible to reduce the gap (pressure reducing portion) by increasing the number of angles of the resistor 102 made of polygonal columns. However, if the gap (pressure reducing portion) is reduced, the passing speed of carbonated water passing through the resistor 102 will decrease. The passing speed is proportional to the discharging time of the carbonated water discharged from the beverage supply nozzle 100, and as the passing speed decreases, the discharging time of discharging a predetermined amount of carbonated water required for sale from the beverage supply nozzle 100 becomes longer. Has the problem. In order to solve this problem, the above-mentioned resistor is divided in the radial direction, and a double structure composed of an inner resistor formed as a solid polygonal column and an outer resistor formed by forming a hollow tubular outer wall in a polygonal shape. In addition, carbonated water is introduced into the outer wall of the inner resistor, the inner wall of the outer resistor into which the inner resistor is inserted, the outer wall of the outer resistor, and the inner wall of the tubular body into which the outer resistor is inserted. A gap formed between the inner wall surface of the tubular body and the outer wall surface portion of the outer resistor, having a gradient in which the diameter gradually decreases from the upstream side to the downstream side where the carbonated water is discharged. It is known that the gaps formed between the flat surface portion of the inner resistor and the inner wall surface of the outer resistor are used as pressure reducing portions (for example, Patent Document 2). According to the invention disclosed in Patent Document 2, the gap (pressure reducing part) becomes smaller by forming the resistor into a double structure divided in the radial direction, and the carbonated water passing through the gap (pressure reducing part). Although the passing speed decreases, the number of gaps (pressure reducing part) increases, so that the amount of carbonated water passing per unit time can be increased, so that the desired amount of carbonated water is discharged within a predetermined discharge time. It is possible to make it. In addition, the inner resistor, the outer resistor into which this inner resistor is inserted, and the tubular body into which this outer resistor is inserted have a diameter from the upstream side where carbonated water is introduced toward the downstream side where carbonated water is discharged. Has the advantage that it can be assembled in a nested manner by having a gradient that gradually shrinks.

Japanese Unexamined Patent Publication No. 2012-144272 Japanese Unexamined Patent Publication No. 2016-172580

By the way, the carbonated water pumped to the carbonated water introduction material 103 shown in FIG. 8 acts to inflate the tubular body 101 and to press the resistor 102 downward. In this case, as in the invention described in Patent Document 2, in the case of a beverage supply nozzle in which the resistor and the tubular body are assembled in a nested manner with a gradient, the bulge of the tubular body and the resistor and the tubular body Since the resistor is made of synthetic resin, the frictional resistance between the two is small, which may cause a problem that the resistor moves downward with respect to the tubular body. The downward movement of the resistor is depressurized if the gradient range (vertical dimension) provided on the inner wall of the tubular body is defined to match the vertical dimension of the outer wall of the outer resistor. The area of the part will be reduced, and the downward movement of the resistor means that the introduction path of carbonated water will expand, and when the introduction path of carbonated water expands, the pressure of carbonated water will decrease and the gas volume will decrease. Causes a decrease in. In order to prevent the resistor from moving downward, it is possible to use a synthetic resin material with a rough surface roughness as the synthetic resin material for the tubular body and the resistor to increase the frictional resistance between the resistor and the tubular body. However, in this case, there is a contradictory problem that the carbon dioxide gas is separated by the collision of the carbonated water with the surface (concave and convex surface) of the synthetic resin material.

The present invention has been made in view of the above points, and an object of the present invention is to provide a beverage supply nozzle capable of solving the above-mentioned problems and securing a predetermined discharge time while suppressing a decrease in gas volume due to a pressure reducing unit. To provide.

The invention according to claim 1 for achieving the above object is a beverage supply nozzle that discharges high-pressure carbonated water generated by mixing cold water and carbonated water after depressurizing it with a resistor. The nozzle includes a carbonated water introduction member to which the high-pressure carbonated water is supplied, a hollow tubular body that discharges the carbonated water introduced through the carbonated water introduction member from the discharge port at the other end, and the tubular body. A plurality of gaps as pressure reducing portions are formed in the circumferential direction of the cross section between the inner wall surface of the tubular body and the outer wall surface adjacent in the radial direction, which are arranged inside, and the outer wall surface or the inner wall surface of the tubular body is formed. One of the wall surfaces is provided with a resistor formed in a polygonal cross section and the other is formed in a circular cross section, and the resistor has a multiple structure divided in the radial direction and is adjacent in the radial direction. In a mode in which a plurality of gaps as pressure reducing portions are formed in the circumferential direction between the wall surface and the outer wall surface, one of the inner wall surface or the outer wall surface adjacent in the radial direction is formed in a polygonal cross section and the other is a cross section. Each of the hollow tubular body and the multi-layered resistor is formed in a circular shape and has a gradient in which the diameter gradually decreases from the upstream side where the carbonated water is introduced to the downstream side where the carbonated water is discharged. The beverage supply nozzle is characterized in that a descent preventing means for preventing the descent of the resistor is provided between the hollow tubular body and the resistor located on the outermost side in the radial direction among the multi-structured resistors. And.

Further, according to the second aspect of the present invention, in the beverage supply nozzle according to the first aspect, the lowering prevention means is provided on the inner wall surface of the hollow tubular body, and is the outermost in the radial direction among the resistors having a multi-layer structure. It is characterized in that it is a stopper that engages with a resistor located at and prevents the resistor from descending.

The invention according to claim 3 is characterized in that, in the beverage supply nozzle according to claim 1, the hollow tubular body and the resistor are made of a synthetic resin having a surface roughness of 0.1 μm or less.
The invention according to claim 4 is characterized in that, in the beverage supply nozzle according to claim 3, the synthetic resin constituting the hollow tubular body and the resistor is an ABS resin.

Further, according to the fifth aspect of the present invention, in the beverage supply nozzle according to the first aspect, the carbonated water introduction member is formed so that the carbonated water introduction pipeline projects upward and the lower side is the axis of the carbonated water introduction pipeline. It is formed as a funnel-shaped expansion part centered on the water, and the head of the multi-layered resistor is conical as a whole, where it coincides with the inclination angle of the expansion part of the carbonated water introduction member. Therefore, among the multiple-structured resistors, the head of the resistor located inside has a step in a manner of sinking from the head of the outer resistor.

According to the beverage supply nozzle according to claim 1 of the present invention, the beverage supply nozzle is a beverage supply nozzle that discharges high-pressure carbonated water generated by mixing cold water and carbonated water after depressurizing it with a resistor. The nozzles are a carbonated water introduction member to which the high-pressure carbonated water is supplied, a hollow tubular body that discharges the carbonated water introduced through the carbonated water introduction member from the discharge port at the other end, and the tubular body. A plurality of gaps as pressure reducing portions are formed in the circumferential direction of the cross section between the inner wall surface of the tubular body and the outer wall surface adjacent in the radial direction, which are arranged inside, and the outer wall surface or the inside of the tubular body. One of the wall surfaces is provided with a resistor formed in a polygonal cross section and the other is formed in a circular cross section, and the resistor has a multiple structure divided in the radial direction and is adjacent in the radial direction. In a mode in which a plurality of gaps as pressure reducing portions are formed in the circumferential direction between the wall surface and the outer wall surface, one of the inner wall surface or the outer wall surface adjacent in the radial direction is formed in a polygonal cross section and the other is a cross section. Each of the hollow tubular body and the multi-layered resistor is formed in a circular shape and has a gradient in which the diameter gradually decreases from the upstream side where the carbonated water is introduced to the downstream side where the carbonated water is discharged. The lowering prevention means for preventing the lowering of the hollow tubular body and the resistor located on the outermost side in the radial direction of the multi-layered resistor in the beverage supply nozzle, for example, claim 2. A stopper is provided on the inner wall surface of the hollow tubular body, which engages with the outermost radial resistor of the multi-layer structure to prevent the resistor from descending. As a result, even if the resistor tries to move downward due to the high-pressure carbonated water introduced from the carbonated water introduction member, the descent preventing means can prevent the resistor from descending. It has the effect of providing a beverage supply nozzle capable of securing the amount of carbonated water passing per unit time while suppressing the decrease.

Further, according to the beverage supply nozzle according to claim 3, in the beverage supply nozzle according to claim 1, the hollow tubular body and the resistor are made of a synthetic resin having a surface roughness of 0.1 μm or less, for example, claim 4. A synthetic resin having a surface roughness of 0.1 μm or less, for example, ABS resin, is used as a synthetic resin material constituting the resistor whose descent is prevented by the descent preventing means and the hollow tubular body by being made of the described ABS resin. This makes it possible to provide a beverage supply nozzle capable of ensuring the passage amount of carbonated water per unit time while suppressing a decrease in gas volume due to the pressure reducing unit.

Further, according to the beverage supply nozzle according to claim 5 of the present invention, in the beverage supply nozzle according to claim 1, the carbonated water introduction member is formed so that the carbonated water introduction pipeline projects upward and downward. It is formed as a funnel-shaped expansion portion centered on the axis of the carbonated water introduction pipeline, and the head of the resistor having a multi-layer structure coincides with the inclination angle of the expansion portion of the carbonated water introduction member. Of the multi-layered resistors that are conical as a whole, the head of the resistor located inside has a step in a manner that sinks from the head of the outer resistor, thereby achieving the following effects. Play. That is, when a resistor having a conical head is simply divided in the radial direction into a multi-layered structure, the inclined surface of the multi-layered resistor on the head side is constant because it has a conical shape as a whole. It became continuous without a break at the inclination angle, and the carbonated water introduced through the carbonated water introduction member flowed along the conical inclined surface of the head of the resistor, and at the beginning when the carbonated water was introduced. Is the gas volume due to the separation of carbonated water due to the sudden change in pressure due to the interruption of the inflow of carbonated water into the pressure reducing part (gap) formed in the circumferential direction of the cross section of the conical inclined surface of the resistor. Causes a decrease (when the introduction path is filled with carbonated water, carbonated water flows evenly into the pressure-reducing parts (gap) formed in the circumferential direction of the cross section, and carbonated water is applied to each pressure-reducing part (gap). On the other hand, among the multiple-structured resistors, the head of the resistor located inside is the head of the outer resistor. Carbonated water is introduced by making the head of the resistor having a multi-layered structure into a conical shape as a whole, where the head of the resistor has a step in a more submerged manner and coincides with the inclination angle of the expanded portion of the carbonated water introducing member. Even at the beginning, in the pressure-reducing part (gap) on the circumference of the concentric circle on the central axis side of the resistor, the carbonated water flowing on the conical inclined surface is blocked by the step to the pressure-reducing part (gap). Since the inflow of carbonated water is continuous, it is possible to suppress a sudden change in pressure, that is, to suppress a decrease in gas volume due to separation of carbonated water.

A beverage supply nozzle according to an embodiment of the present invention is shown, (a) is a side view showing the overall configuration thereof, and (b) is a sectional view taken along line AA of (a). The tubular body in the beverage supply nozzle of FIG. 1 is shown, (a) is a perspective view of the tubular body viewed from diagonally above, and (b) is a cross-sectional view of the tubular body. The carbonated water introduction member in the beverage supply nozzle of FIG. 1 is shown, (a) is a perspective view of the carbonated water introduction member viewed from diagonally above, and (b) is a sectional view taken along line BB of (a). The outer resistor constituting the resistor in the beverage supply nozzle of FIG. 1 is shown, (a) is a perspective view of the outer resistor viewed from diagonally below, (b) is a side view of the outer resistor, and (c) is (c). It is a cross-sectional view taken along the line CC of b). It is a side view which shows the inner resistor which constitutes the resistor in the beverage supply nozzle of FIG. It is sectional drawing which shows the resistor of FIG. A modified example of the inner resistor constituting the resistor of FIG. 5 is shown, (a) is a perspective view of the inner resistor viewed from diagonally below, and (b) is a sectional view taken along line DD of (a). It is the schematic which shows the cross section of the channel system and the beverage nozzle to which the conventional beverage supply nozzle is applied.

Hereinafter, the beverage supply nozzle in the beverage supply device such as the beverage dispenser according to the embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the beverage supply nozzle NZ is integrally mounted on the hollow tubular body 1, the resistor 2 inserted inside the hollow tubular body 1, and the upper portion of the hollow tubular body 1. It is composed of a carbonated water introduction member 3.

The hollow tubular body 1 is a molded product of a synthetic resin made of ABS resin having a surface roughness of 0.1 μm or less. The upstream side of the tubular body 1 is formed in a circular shape in cross section and has a relatively large diameter as a storage space for the resistor 3, while the downstream side of the tubular body 1 is funnel-shaped and has a small diameter. Reach exit 11. The upstream side of the relatively large-diameter tubular body 1 is composed of a connection region SS of the carbonated water introduction member 3 and a resistor storage region RS for accommodating the resistor 2. The resistor storage area RS in the tubular body 1 is a portion where the outer wall of the resistor 2 housed therein abuts, and the upper side of the resistor storage area RS is the connection area SS. A screw groove 12 (see also FIG. 2) is formed in the connection region SS to be screwed with a screw groove 331 (see also FIG. 3) provided on the outer wall 33 of the carbonated water introduction member 3.

The resistor storage area RS in the tubular body 1 has a diameter on the lower end side (downstream side where carbonated water is discharged) of the resistor storage area RS with respect to the diameter on the upper end side (upstream side where carbonated water is introduced). It is formed with a gradient so that it is small. That is, as shown in FIG. 2B, the inner wall and the outer wall of the tubular body 1 in the resistor storage area RS with respect to the vertical line segment VL have the resistor storage area RS from the upstream side in the resistor storage area RS. There is a gradient (for example, a gradient of 3 degrees) in which the diameter gradually decreases toward the downstream side of the.

As shown in FIG. 2B, a stopper 1a projecting inward is integrally molded in the lower end region of the resistor storage region RS on the inner wall surface of the tubular body 1. The stopper 1a constitutes a lowering prevention means. The stopper 1a engages with the lower edge of the resistor 2 described later to prevent the resistor 2 from moving downward. The stoppers 1a are arranged on the inner wall surface of the tubular body 1 in a circumferential direction (three at intervals of 120 degrees in this example).

A three-month-shaped chilled water passage 113 partitioned from the carbonated water passage 111 by a three-month-shaped partition wall 112 having a cross-sectional cross section is formed on the lower side of the tubular body 1, and an opening formed in the outer wall of the chilled water passage 113 is used. The cold water introduction path (not shown) is positioned at the positioning protrusion 114 in a manner of supplying cold water to the cold water passage 113, but the cold water introduction path is not an indispensable configuration. I have omitted it here. Reference numeral 115 is a mounting piece for mounting on the beverage dispenser.

The carbonated water introduction member 3 functions as a lid in a manner of closing the hollow tubular body 1. As shown in FIG. 3, the carbonated water introduction member 3 includes an annular storage groove 300 for storing the O-ring 30 (see FIG. 1) and a screw groove 331 screwed into the screw groove 12 provided on the tubular body 1. ing. The carbonated water introduction member 3 is integrated with the tubular body 1 by being screwed to the upper part of the tubular body 1 via an O-ring 30. In the carbonated water introduction member 3, the carbonated water introduction pipe 31 is formed so as to project upward, and the lower part is formed as a funnel-shaped expansion portion 32 centered on the axis of the carbonated water introduction pipe 31. There is. The inclination angle of the funnel-shaped expansion portion 32 corresponds to the inclination angle of the cone of the head formed in the conical shape of the resistor 2 described later, and the expansion portion 32 and the head of the resistor 2 The space between them becomes the introduction path, and the pressure of the carbonated water becomes constant because the interval between the introduction paths is constant. A high-pressure carbonated water supply pipe generated by the carbonator 107 shown in FIG. 8 is connected to the carbonated water introduction pipe 31 via an electromagnetic valve V1. In this embodiment, the carbonated water introduction member 3 is formed in a hollow shape having a space between the carbonated water introduction pipe 31 and the outer wall 33, but the carbonated water introduction member 3 is not limited to the hollow shape and may be solid.

The resistor 2 is divided into a plurality of pieces in the radial direction, and in this embodiment, the resistor 2 is divided into an outer resistor 21 and an inner resistor 22 to form a double structure. The outer resistor 21 and the inner resistor 22 are molded products of synthetic resin made of ABS resin having a surface roughness of 0.1 μm or less.

As shown in FIG. 4, the outer resistor 21 is formed in a hollow tubular shape. The inner wall of the hollow tubular outer resistor 21 is formed in a circular shape in cross section, while the outer wall is formed in a polygonal shape in cross section (for example, a regular 27-sided shape). By forming the outer wall of the outer resistor 21 into a polygonal cross section in this way, the outer wall of the outer resistor 21 is provided with a plurality of corner portions 211 and a flat surface portion 212. Further, as shown in FIG. 4C, the outer and inner walls of the outer resistor 21 have a gradient (for example, 3 degrees) whose diameter gradually decreases from the upstream side to the downstream side with respect to the vertical line segment VL. Gradient) is attached. Here, the diameters of the respective circles connecting the upper end (head) and the lower end corners 211 of the outer wall of the outer resistor 21 are the inner walls of the upper and lower ends of the resistor storage area RS of the tubular body 1, respectively. The diameter is set to match the diameter. A stopper 21a projecting inward is integrally formed on the lower side of the inner wall of the outer resistor 21. The stopper 21a engages with the lower edge of the inner resistor 22 described later to prevent the inner resistor 22 from moving downward. The stoppers 21a are arranged on the inner wall surface of the outer resistor 21 in a circumferential direction (three at intervals of 120 degrees in this example). The stopper 21a suppresses the movement of the inner resistor 22 downward even when the outer resistor 21 and the inner resistor 22 are made of a synthetic resin made of ABS resin having a surface roughness of 0.1 μm or less. It is a thing, not necessarily necessary.

Further, the upper end portion (head) and the lower end portion of the outer resistor 21 are formed as inclined surfaces 213,214 so as to narrow from the outer wall toward the inner wall. The inclination angle of the inclined surface 213 of the upper end portion (head) is configured to match the inclination angle of the inclined surface of the conical head 220 of the inner resistor 22, which will be described later. Then, an inclined surface 215 (see FIG. 4C) that inclines in the direction opposite to the inclined surface 213 is formed on the inner wall side of the upper end portion (head) of the outer resistor 21, and the inclined surface 213 and the inclined surface 215 are formed. The connection with the watershed forms a peak as a watershed.

As shown in FIG. 5, the inner resistor 22 includes a conical head 220. The inclination angle of the conical head 220 coincides with the inclination angle of the funnel-shaped expansion portion 32 of the carbonated water introduction member 3. The outer wall of the inner resistor 22 has a polygonal cross-sectional shape (for example, a regular 21-sided shape), and is formed as a polygonal column having a plurality of square portions 221 and a flat surface portion 222. The outer wall of the inner resistor 22 is provided with a gradient (for example, a gradient of 3 degrees) whose diameter gradually decreases from the upstream side to the downstream side with respect to the vertical line segment VL. The diameter of the circle connecting the upper ends of the corners 221 of the outer wall of the inner resistor 22 (in other words, the bottom of the conical head 220) is the upper end of the inner wall of the outer resistor 21, that is, the upper end of the outer resistor 21. The diameter is set to match the diameter on the lower side of the inclined surface 215 forming the peak. Therefore, the diameter of the circle connecting the upper ends of the corners 221 of the outer wall of the inner resistor 22 (the bottom of the conical head 220) is set to be slightly smaller than the diameter of the peak at the upper end of the inner wall of the outer resistor 21. ing.

Although the inner resistor 22 is formed as a solid in this embodiment, it may be hollow as shown in the modified example of FIG. 7. The inner resistor 22A shown in FIG. 7 has the same configuration as the inner resistor 22 shown in FIG. 5, except that the inside thereof is formed as a hollow leaving a cross-shaped reinforcing wall 223. is there. That is, the inner resistor 22A is formed in a polygonal columnar shape having a conical head 220A and a plurality of corner portions 221A and flat surface portions 222B on the outer wall. The outer wall of the inner resistor 22A is provided with a gradient (for example, a gradient of 3 degrees) whose diameter gradually decreases from the upstream side to the downstream side with respect to the vertical line segment VL.

As shown in FIG. 6, the resistor 2 is integrated by inserting the inner resistor 22 in a nested manner from the upper end opening of the hollow tubular outer resistor 21. The inner resistor 22 inserted into the outer resistor 21 is pushed into the stopper 21a that protrudes inward at the inner wall surface of the outer resistor 21 until the lower edge of the inner resistor 22 comes into contact with the stopper 21a. In this case, the plurality of corners 221 of the inner resistor 22 gradually come into contact with the inner wall of the outer resistor 21 in the process of descending until the lower edge of the inner resistor 22 abuts on the stopper 21a of the outer resistor 21. When the lower edge of the inner resistor 22 comes into contact with the stopper 21a of the outer resistor 21, the plurality of corner portions 221 of the inner resistor 22 are in close contact with the inner wall of the outer resistor 21. When the lower edge of the inner resistor 22 is in contact with the stopper 21a of the outer resistor 21, the inclination angle of the inclined surface of the upper end (head) of the outer resistor 21 is the conical head of the inner resistor 22. Since it is configured to match the inclination angle of the inclined surface of the portion 220, the head of the resistor 2 has a conical shape as a whole, and the inclination angle of the conical head is the funnel of the carbonated water introduction member 3. It coincides with the inclination angle of the expanded portion 32 of the shape. In this case, the bottom of the conical head 220 of the inner resistor 22 is located at the upper end of the inner wall of the outer resistor 21 (the lower side of the inclined surface 215 forming the peak of the upper end of the outer resistor 21). Therefore, the outer resistor 21 has a step (see FIG. 6) in a manner of sinking from the peak at the upper end (connecting portion between the inclined surface 211 and the inclined surface 213).

In this way, the inner resistor 22 is inserted into the hollow outer resistor 21 in a nested manner and integrated into the resistor 2, and all the flat surfaces (outer wall surface) 222 and the outer resistor of the inner resistor 22 are integrated. It is described in Patent Document 2 that a plurality of gaps (not shown) are formed between the inner wall surface of the 21 and the inner wall surface of the cross section in the circumferential direction of the cross-sectional circle, and the plurality of gaps formed in the circumferential direction form a pressure reducing portion. That's right.

The resistor 2 thus assembled is nested inside the tubular body 1 through the upper end opening of the hollow tubular body 1 and is mounted on the resistor storage area RS. The resistor 2 inserted into the hollow tubular body 1 has a stopper 1a that projects inwardly provided on the inner wall surface of the hollow tubular body 1 and has a lower edge of the outer resistor 21 that constitutes the resistor 2. Pushed in until it touches. Here, the position of the stopper 1a provided in the lower end region of the resistor storage area RS on the inner wall of the tubular body 1 is the corner portion (outer resistance) of the resistor 2 when the resistor 2 is inserted into the tubular body 1 in a nested manner. The corners 211) of the outer wall of the body 21 are in close contact with the inner wall surface of the tubular body 1 and engage with the lower edge of the outer resistor 21 constituting the resistor 2 in a state where the resistor 2 is fixed to the tubular body 1. It is defined in the place. Therefore, in the process of descending until the lower end of the outer resistor 21 comes into contact with the stopper 1a of the hollow tubular body 1, the plurality of corner portions 211 of the outer resistor 21 gradually come into contact with the inner wall of the hollow tubular body 1. When the lower edge of the outer resistor 21 comes into contact with the stopper 1a of the hollow tubular body 1, the plurality of corner portions 211 of the outer resistor 21 come into close contact with the inner wall of the hollow tubular body 1. In this way, when the resistor 2 is inserted into the tubular body 1 in a nested manner and integrated, all the flat surfaces of the resistor 2 (all the flat portions 212 of the outer resistor 21) and the inside of the tubular body 1 are integrated. As described in Patent Document 2, a plurality of gaps (not shown) are formed between the wall surface and the wall surface in the circumferential direction of the cross-sectional circle, and the plurality of gaps formed in the circumferential direction form the pressure reducing portion. is there.

In the beverage supply nozzle NZ having such a configuration, the carbonated water pumped into the carbonated water introduction pipeline 31 (see FIG. 1) is evenly dispersed along the conical head 220 of the resistor 2 (inner resistor 22). The gap (pressure reducing part) formed between all the flat surfaces 222 of the inner resistor 22 and the inner wall surface of the outer resistor 21 and all the flat surfaces of the resistor 2 (outer resistor 21). It is discharged from the discharge port 11 through a gap (pressure reducing part) formed between the portion 212 and the inner wall surface of the tubular body 1.

Here, the tubular body 1, the outer resistor 21, and the inner resistor 22 are made of a synthetic resin material, and carbon dioxide gas is separated by colliding with the surface (concave and convex surface) of the synthetic resin material, but the surface is rough. Separation of carbon dioxide gas in the case of synthetic resin materials such as PA resin, PPE resin, PP resin with a thickness of more than 0.1 μm, whereas separation of carbon dioxide gas in the case of ABS resin with a surface roughness of 0.1 μm or less Less has been obtained by the inventor's experiments. Further, when the surface is made of ABS resin having a surface roughness of 0.1 μm or less, the frictional resistance between the tubular body 1 and the outer resistor 21 and the outer resistor 21 and the inner resistor 22 is small, so that the carbonated water introduction path Where the carbonated water is pumped from 31 and acts on the outer resistor 21 and the inner resistor 22, the pressure applied to move the outer resistor 21 and the inner resistor 22 downward causes the outer resistor 21 and the inner resistor 21 and the inner resistor 22 to move downward. The resistor 22 is encouraged to move downward, but the stopper 1a provided on the inner wall of the tubular body 1 and the stopper 21a provided on the outer resistor 21 allow the outer resistor 21 and the inner resistor 22 to move downward. Be blocked. Therefore, it is possible to use an ABS resin having a surface roughness of 0.1 μm or less as the synthetic resin material constituting the resistor 2 and the hollow tubular body 1, and it is possible to suppress a decrease in gas volume due to the pressure reducing portion. Is possible.

Further, in the beverage supply nozzle NZ of this embodiment, the head of the resistor 2 has a conical shape as a whole where it coincides with the inclination angle of the expanded portion of the carbonated water introduction member, and the inner resistor 22 is formed. Since the bottom of the conical head 220 of the above has a step in a manner of sinking from the peak at the upper end of the outer resistor 21, the inner resistance even at the beginning when the carbonated water is introduced from the carbonated water introduction pipeline 31. In the pressure-reducing portions (gap) formed between the body 22 and the outer resistor 21 in the circumferential direction of the cross-sectional circle, the pressure-reducing portion is such that the carbonated water flowing on the conical inclined surface is blocked by the step. Since the inflow of carbonated water into the part (gap) is continuous, sudden changes in pressure are suppressed, that is, when there is no step, the inflow of carbonated water into the pressure reducing part (gap) is interrupted and the pressure suddenly changes. As a result, the gas volume decreases due to the separation of carbon dioxide gas, while the continuous inflow of carbonated water into the pressure reducing part (gap) suppresses sudden changes in pressure and the gas volume due to the separation of carbon dioxide gas. It is possible to suppress the decrease.

As described above, in the beverage supply nozzle NZ according to this embodiment, the beverage supply nozzle NZ that discharges high-pressure carbonated water generated by mixing cold water and carbonated water after decompressing it with the resistor 2. The beverage supply nozzle NZ is a hollow that discharges the carbonated water introduction member 3 to which the high-pressure carbonated water is supplied and the carbonated water introduced through the carbonated water introduction member 3 from the discharge port 11 at the other end. In a mode in which a plurality of gaps as pressure reducing portions are formed in the circumferential direction between the tubular body 1 of the above and the inner wall surface of the tubular body 1 and the outer wall surface adjacent to the inner wall surface in the radial direction. The outer wall surface or the inner wall surface of the tubular body is provided with a resistor 2 having a polygonal cross section and the other having a circular cross section, and the resistor 2 is divided in the radial direction. (For example, a double structure of an outer resistor 21 and an inner resistor 22), and an inner wall surface (inner wall surface of the outer resistor 21) and an outer wall surface (outer wall surface of the inner resistor 22) adjacent to each other in the radial direction. ), In a manner in which a plurality of gaps as pressure reducing portions are formed in the circumferential direction, on the inner wall surface (inner wall surface of the outer resistor 21) or the outer wall surface (outer wall surface of the inner resistor 22) adjacent in the radial direction. One is formed in a polygonal cross section and the other is formed in a circular cross section, and each of the hollow tubular body 1 and the resistor 2 having a multi-layer structure discharges carbonated water from the upstream side where carbonated water is introduced. In the beverage supply nozzle NZ having a gradient in which the diameter gradually decreases toward the downstream side, the inner wall surface of the hollow tubular body 1 and the outermost resistance in the radial direction of the multi-structured resistor 2. By providing a lowering prevention means (stopper 1a) for preventing the lowering of the resistor (outer resistor 21) from the body (outer resistor 21), the high pressure introduced from the carbonated water introduction member 3 is provided. Even if the resistor 2 tries to move downward due to carbonated water, the descent prevention means (stopper 1a) can prevent the resistor 2 from descending, so that the unit time while suppressing the decrease in gas volume due to the pressure reducing unit. This has the effect of providing a beverage supply nozzle capable of ensuring the passage amount of carbonated water per hit.

In the above-described embodiment, it is located on the outermost side in the radial direction of the double-structured resistor 2 provided on the inner wall surface of the hollow tubular body 1 as the best form of the lowering prevention means. Although the stopper 1a that engages with the outer resistor 21 to prevent the outer resistor 21 from descending has been described, the outer wall of the outer resistor 21 is formed with a stopper that projects outward, while the tubular body is formed. A groove (a groove extending in the vertical direction and deepening as it goes downward) is formed on the inner wall to receive the stopper of the outer resistor 21, or the hollow tubular body is made of a member different from the hollow tubular body 1. It is possible to adopt a configuration in which a lowering blocking member is provided to prevent the resistor 2 from lowering while being locked to the hollow tubular body 1 in a manner of engaging with the inner wall surface of 1. Further, in the above-described embodiment, the resistor 2 having a double structure composed of the outer resistor 21 and the inner resistor 22 has been described, but the resistor 2 is not limited to the double structure and may be double or more. You can also do it. Further, in the above-described embodiment, the inner wall surface of the tubular body is formed in a circular shape in cross section, and the outer wall surfaces of the outer resistor 21 and the inner resistor 22 are formed in a polygonal cross section, respectively. Although the inner wall surface of the 21 is formed into a circular cross section, the inner wall surface of the tubular body has a polygonal cross section, and the outer wall surfaces of the outer resistor 21 and the inner resistor 22 have a circular cross section. The inner wall surface of the outer resistor 21 can also have a cross-sectional polygonal shape. Therefore, the beverage supply nozzle according to the present invention is not limited to the one shown in the embodiment.

NZ ... Beverage supply nozzle, 1 ... Tubular body, 1a ... Stopper (lowering prevention means), 2 ... Resistor, 3 ... Carbonated water introduction member, 11 ... Discharge port, 21 ... Outer resistor, 21a ... Stopper, 22 ... Inner Resistor, 31 ... Carbonated water introduction pipeline, 211,221 ... Corner, 212, 222 ... Flat surface.

Claims (5)

A beverage supply nozzle that discharges high-pressure carbonated water generated by mixing cold water and carbon dioxide after decompressing it with a resistor. The beverage supply nozzle is a carbonated water introduction to which the high-pressure carbonated water is supplied. A member, a hollow tubular body that discharges carbonated water introduced through the carbonated water introduction member from the discharge port at the other end, and a cylindrical body disposed inside the tubular body in the radial direction with the inner wall surface of the tubular body. One of the outer wall surface or the inner wall surface of the tubular body is formed in a polygonal cross section and the other is formed in a mode in which a plurality of gaps as pressure reducing portions are formed between the adjacent outer wall surface and the inner wall surface of the tubular body in the circumferential direction of the cross section. It is provided with a resistor formed in a circular cross section, and the resistor has a multi-layered structure divided in the radial direction, and a gap as a pressure reducing portion is provided between the inner wall surface and the outer wall surface adjacent to each other in the radial direction. In a mode in which a plurality of the inner and outer wall surfaces are formed in the circumferential direction, one of the inner wall surface or the outer wall surface adjacent to the radial direction is formed in a polygonal cross section and the other is formed in a circular cross section. Each of the resistors is a hollow tubular body and a multi-layered resistor in a beverage supply nozzle having a gradient in which the diameter gradually decreases from the upstream side where the carbonated water is introduced to the downstream side where the carbonated water is discharged. A beverage supply nozzle, characterized in that a lowering prevention means for preventing the lowering of the resistor is provided between the resistor and the outermost resistor in the radial direction. In the beverage supply nozzle according to claim 1, the lowering prevention means is provided on the inner wall surface of the hollow tubular body and engages with the outermost resistor in the radial direction among the resistors having a multi-layer structure. A beverage supply nozzle characterized by being a stopper that prevents the resistor from descending. The beverage supply nozzle according to claim 1, wherein the hollow tubular body and the resistor are made of a synthetic resin having a surface roughness of 0.1 μm or less. The beverage supply nozzle according to claim 3, wherein the synthetic resin constituting the hollow tubular body and the resistor is an ABS resin. In the beverage supply nozzle according to claim 1, the carbonated water introduction member is formed so that the carbonated water introduction pipeline projects upward and the lower portion expands in a funnel shape around the axis of the carbonated water introduction pipeline. Of the multi-structured resistors, which are formed as open portions, the head of the multi-layered resistor is conical as a whole and coincides with the inclination angle of the expanded portion of the carbonated water introduction member. A beverage supply nozzle characterized in that the head of the resistor located inside has a step in a manner of sinking from the head of the resistor on the outside.

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