Beverage supply nozzle

Abstract

A beverage supply nozzle (NZ) which sprays carbonated water after reducing the pressure of high-pressure carbonated water using a multi-structured resistance body (2) arranged inside a tubular body (1), wherein, in order to prevent the resistance body (2) from moving downward under the action of the high-pressure carbonated water introduced from a carbonated water introduction member (3), a stopper (1a) is provided between the hollow tubular body (1) and the resistance body (outer resistance body (21)) located radially outermost in the multi-structured resistance body (2), and the resistance body (2) is prevented from descending by using the stopper (1a).

Description

Technical Field

[0001] The present invention relates to a beverage supply nozzle in a beverage supply device such as a beverage machine and a cup-type automatic vending machine, and in particular to a beverage supply nozzle for spraying carbonated water generated inside the beverage supply device. Background Art

[0002] For example, in a beverage machine that mixes a slurry selected from a plurality of different types of slurries (concentrated liquids) with dilution water such as carbonated water or cold water and sells the mixture, a carbonator that mixes cold water and carbon dioxide to produce carbonated water is provided inside the beverage machine, and the carbonated water produced by the carbonator is poured into a beverage container from a beverage supply nozzle. Figure 8 , Figure 8 It is a schematic diagram showing a flow path system to which the beverage supply nozzle is applied and a cross section of the beverage nozzle.

[0003] like Figure 8 As shown, a conventional beverage supply nozzle 100 includes a hollow tubular body 101 and a resistor 102 inserted into the tubular body 101, and the tubular body 101 and the resistor 102 are molded products of synthetic resin. A carbonated water introduction member 103 having the function of a cover member is mounted on the upper end of the tubular body 101, and on the other hand, a spray port 104 is formed at the lower end of the tubular body 101. In addition, a cold water introduction passage 105 is formed protruding in the radially outward direction in the middle region of the tubular body 101, and a net 106 as a filtering member is arranged inside the tubular body 101. The resistor 102 is formed as a solid polygonal column composed of a polygonal columnar body having a polygonal cross section (e.g., a dodecagonal shape), and the head of the resistor 102 is formed protruding in a conical shape. The resistor 102 is inserted into the hollow portion of the tubular body 101 in such a manner that each edge of the polygonal column contacts the inner wall surface of the tubular body 101, thereby forming a gap (pressure reducing portion) between the plane portion of the polygonal column resistor 102 and the cylindrical inner wall surface of the tubular body 101. In this way, a plurality of gaps serving as pressure reducing portions are formed in the circumferential direction of the cross-sectional circle. The device is configured to supply carbonated water generated by mixing cold water and carbon dioxide using a carbonator 107 to the carbonated water introduction member 103 via an electromagnetic valve V1, and to supply cold water obtained by cooling tap water from a city water pipe using a cooling water tank to the cold water introduction passage 105 via an electromagnetic valve V2.

[0004] In this structure, when the beverage selection button of the carbonated beverage system provided on the operation panel of the beverage machine is pressed, the electromagnetic valve V1 is energized at a predetermined time, and carbonated water generated by mixing cold water and carbon dioxide by the carbonator 107 is pressed to the carbonated water introduction member 103. The carbonated water pressed to the carbonated water introduction member 103 is evenly distributed along the conical head of the resistor 102, and then ejected from the ejection port 104 through the gap formed between the flat portion of the resistor 102 and the inner wall surface of the tubular body 101. In addition, when the beverage selection button of the non-carbonated beverage system provided on the operation panel of the beverage machine is pressed, the electromagnetic valve V2 is energized at a predetermined time, and cold water is ejected from the ejection port 104 of the tubular body 101 through the cold water introduction passage 105 (for example, Patent Document 1). According to the invention disclosed in the patent document 1, the carbonated water that is pressurized to the carbonated water introduction member 103 is depressurized when passing through the gap between the plane portion of the polygonal column formed in the resistance body 102 and the inner wall surface of the tubular body 101, thereby preventing the reduction of the gas amount caused by the separation of carbon dioxide. In addition, by forming the head of the resistance body 102 into a cone shape, when the carbonated water hits the head of the resistance body 102, no vortex is generated, but the carbonated water flows in a dispersed manner to the surroundings and is guided to the gap (pressure reduction portion), thereby being able to suppress the separation of carbon dioxide caused by the generation of the vortex, and excelling in the above points.

[0005] In addition, the smaller the gap (pressure reducing portion) formed between the plane portion of the polygonal prism of the resistor 102 and the inner wall surface of the tubular body 101, the more it is possible to prevent the reduction in the amount of gas caused by the separation of carbon dioxide when carbonated water passes through. Therefore, if the number of edges of the resistor 102 composed of the polygonal prism is increased, the gap (pressure reducing portion) can be reduced. However, when the gap (pressure reducing portion) is reduced, the speed at which carbonated water passes through the resistor 102 is reduced. The passing speed is proportional to the ejection time of carbonated water ejected from the beverage supply nozzle 100, and there is a problem that the lower the passing speed, the longer the ejection time of the predetermined amount of carbonated water required for sale from the beverage supply nozzle 100. In order to solve this problem, it is known that the above-mentioned resistance body is divided radially to form a double structure consisting of an inner resistance body formed as a solid polygonal prism and an outer resistance body with a hollow tubular outer wall formed in a polygonal shape, and the outer wall of the inner resistance body, the inner wall of the outer resistance body for the inner resistance body to be inserted, the outer wall of the outer resistance body and the inner wall of the tubular body for the outer resistance body to be inserted have a slope of gradually decreasing diameter from the upstream side for introducing carbonated water to the downstream side for spraying carbonated water, so that the gap formed between the inner wall surface of the tubular body and the outer wall plane portion of the outer resistance body, and the gap formed between the plane portion of the inner resistance body and the inner wall surface of the outer resistance body are respectively pressure reducing portions (for example, patent document 2). According to the invention disclosed in Patent Document 2, by providing a double structure in which the resistor is divided in the radial direction, the gap (pressure reducing portion) becomes smaller, and the speed of passing carbonated water through the gap (pressure reducing portion) is reduced, but the number of gaps (pressure reducing portions) is increased, so the amount of carbonated water passing per unit time can be increased, so that the desired amount of carbonated water can be sprayed out within a predetermined spraying time. In addition, by making the inner resistor, the outer resistor into which the inner resistor is inserted, and the tubular body into which the outer resistor is inserted have a slope in which the diameter gradually decreases from the upstream side where carbonated water is introduced toward the downstream side where carbonated water is sprayed out, there is an advantage that they can be assembled in a nested manner.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2012-144272

[0009] Patent Document 2: Japanese Patent Application Publication No. 2016-172580 Summary of the invention

[0010] Problem that the invention aims to solve

[0011] In addition, it is pressed to Figure 8The carbonated water in the carbonated water introduction member 103 shown acts in a manner to expand the tubular body 101 and in a manner to press the resistor 102 downward. In this case, in a beverage supply nozzle in which the resistor and the tubular body are assembled in a nested manner with a slope as in the invention described in Patent Document 2, the expansion of the tubular body and the fact that the friction resistance between the resistor and the tubular body is small because the resistor and the tubular body are made of synthetic resin interact with each other, and there is a possibility that the resistor moves downward relative to the tubular body. In the case where the range of the slope set on the inner wall of the tubular body (the dimension in the vertical direction) is set to be consistent with the dimension in the vertical direction of the outer wall of the outer resistor, the downward movement of the resistor will cause the area of ​​the pressure relief portion to shrink. In addition, the downward movement of the resistor means that the introduction path of the carbonated water is expanded. When the introduction path of the carbonated water is expanded, the pressure of the carbonated water is reduced, resulting in a reduction in the amount of gas. In order to prevent the resistance body from moving downward, it is conceivable to use a synthetic resin material with a larger surface roughness as the synthetic resin material of the tubular body and the resistance body to increase the frictional resistance between the resistance body and the tubular body. However, in this case, there will be a counterproductive problem that carbonated water impacts the surface (concave and convex surface) of the synthetic resin material and separates the carbon dioxide.

[0012] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a beverage supply nozzle that solves the above-mentioned problems, can suppress a decrease in the amount of gas in the pressure reducing portion, and can ensure a predetermined ejection time.

[0013] Solutions for solving problems

[0014] In order to achieve the above-mentioned purpose, the invention of technical solution 1 provides a beverage supply nozzle, which sprays out the carbonated water after decompressing the high-pressure carbonated water generated by mixing cold water and carbon dioxide, and is characterized in that the beverage supply nozzle comprises: a carbonated water introduction member to which the high-pressure carbonated water is supplied; a hollow tubular body, which sprays the carbonated water introduced through the carbonated water introduction member from a spray port at the other end; and a resistance body, which is arranged inside the tubular body, the resistance body is in a form in which a plurality of gaps as pressure reducing portions are formed along the circumferential direction of the cross section between the inner wall surface of the tubular body and the outer wall surface of the resistance body adjacent to the inner wall surface of the tubular body in the radial direction, and the cross section of one of the outer wall surface and the inner wall surface of the tubular body is formed into a polygonal shape. , and the cross-section of the other of the outer wall surface and the inner wall surface of the tubular body is formed into a circular shape, the resistance body is a multiple structure divided in the radial direction, and is a form in which a plurality of gaps as pressure reducing parts are formed along the circumferential direction between the inner wall surface and the outer wall surface adjacent in the radial direction, the cross-section of one of the inner wall surface and the outer wall surface adjacent in the radial direction is formed into a polygonal shape, and the cross-section of the other of the inner wall surface and the outer wall surface adjacent in the radial direction is formed into a circular shape, the hollow tubular body and the multiple-structured resistance body respectively have a slope of gradually decreasing diameter from the upstream side of introducing carbonated water toward the downstream side of spraying carbonated water, and an anti-falling component for preventing the resistance body from falling is provided between the hollow tubular body and the radially outermost resistance body in the multiple-structured resistance body.

[0015] In addition, the invention of Technical Solution 2 is characterized in that, in the beverage supply nozzle described in Technical Solution 1, the anti-descent component is a stopper which is arranged on the inner wall surface of the hollow tubular body and engages with the radially outermost resistance body among the multi-structured resistance bodies to prevent the resistance body from descending.

[0016] 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 resistance body are formed of a synthetic resin having a surface roughness of 0.1 μm or less.

[0017] 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 resistance body is ABS resin.

[0018] In addition, the invention of Technical Solution 5 is characterized in that, in the beverage supply nozzle described in Technical Solution 1, the carbonated water introduction component is formed with a carbonated water introduction pipe protruding upward, the lower part of the carbonated water introduction component is formed as an expansion portion that expands in a funnel shape with the axis of the carbonated water introduction pipe as the center, the head of the multi-structured resistance body is generally conical in shape with the same inclination angle as the expansion portion of the carbonated water introduction member, and the head of the resistance body located on the inner side of the multi-structured resistance body is sunken relative to the head of the resistance body on the outer side, and has a step.

[0019] Effects of the Invention

[0020] According to a beverage supply nozzle of technical solution 1 of the present invention, the carbonated water is sprayed out after the high-pressure carbonated water generated by mixing cold water and carbon dioxide is depressurized, wherein the beverage supply nozzle comprises: a carbonated water introduction member to which the high-pressure carbonated water is supplied; a hollow tubular body which sprays the carbonated water introduced through the carbonated water introduction member from a spray port at the other end; and a resistance body which is arranged inside the tubular body, the resistance body being in a form in which a plurality of gaps as pressure reducing portions are formed along the circumferential direction of the cross section between the inner wall surface of the tubular body and the outer wall surface adjacent to the inner wall surface of the tubular body in the radial direction of the resistance body, the cross section of one of the outer wall surface and the inner wall surface of the tubular body being in a polygonal shape, and the cross section of the other of the outer wall surface and the inner wall surface of the tubular body being in a circular shape, the resistance body being in a multiple structure divided in the radial direction, and being in a form in which a plurality of gaps as pressure reducing portions are formed along the circumferential direction between the inner wall surface and the outer wall surface adjacent to the inner wall surface in the radial direction, and the inner wall surface adjacent to the inner wall surface in the radial direction being in a The cross-section of one of the inner wall surface and the outer wall surface is formed into a polygonal shape, and the cross-section of the other of the radially adjacent inner wall surface and the outer wall surface is formed into a circular shape. The hollow tubular body and the multi-structured resistance body respectively have a slope of gradually decreasing diameter from the upstream side of introducing carbonated water toward the downstream side of spraying carbonated water. In the beverage supply nozzle, an anti-falling component for preventing the resistance body from descending is provided between the hollow tubular body and the radially outermost resistance body among the multi-structured resistance bodies. For example, a stopper as described in technical solution 2 is provided, which is provided on the inner wall surface of the hollow tubular body and engages with the radially outermost resistance body among the multi-structured resistance bodies to prevent the resistance body from descending. Thus, even if the resistance body wants to move downward under the action of high-pressure carbonated water introduced from the carbonated water introduction component, the anti-falling component can be used to prevent the resistance body from descending. Therefore, the following effect is achieved, namely, a beverage supply nozzle that can suppress the reduction of the gas amount in the pressure reduction portion and ensure the passage amount of carbonated water per unit time can be provided.

[0021] In addition, according to the beverage supply nozzle of technical solution 3, in the beverage supply nozzle described in technical solution 1, the hollow tubular body and the resistance body are formed of a synthetic resin having a surface roughness of less than 0.1 μm, for example, the ABS resin described in technical solution 4. Thus, a synthetic resin having a surface roughness of less than 0.1 μm, such as ABS resin, can be used as the synthetic resin material constituting the resistance body and the hollow tubular body that are prevented from descending by the anti-descent component, thereby achieving the following effect, namely, a beverage supply nozzle that can suppress the reduction in the amount of gas in the pressure reduction portion and ensure the passage amount of carbonated water per unit time can be provided.

[0022] In addition, according to the beverage supply nozzle of technical solution 5 of the present invention, in the beverage supply nozzle described in technical solution 1, the carbonated water introduction component is formed with a carbonated water introduction pipe protruding upward, the lower part of the carbonated water introduction component is formed as an expansion portion that expands in a funnel shape with the axis of the carbonated water introduction pipe as the center, the head of the multi-structured resistance body is a cone as a whole that is consistent with the inclination angle of the expansion portion of the carbonated water introduction member, and the head of the resistance body located on the inner side of the multi-structured resistance body has a step in the shape of sinking relative to the head of the resistance body on the outer side, thereby achieving the following effect. That is, when only the resistance body having a conical head is made into a multiple structure divided in the radial direction, the inclined surface on the head side of the resistance body of the multiple structure is conical in shape as a whole, so it is continuously connected at a certain inclination angle, and the carbonated water introduced through the carbonated water introduction member flows along the conical inclined surface of the head of the resistance body. In the initial stage of introducing the carbonated water, the inflow of the carbonated water into the multiple pressure reducing portions (gaps) formed along the circumferential direction of the cross section of the conical inclined surface of the resistance body becomes intermittent, so that the pressure changes rapidly, and the gas amount is reduced due to the separation of carbon dioxide (when the introduction passage is filled with carbonated water, carbonated water flows evenly into the multiple pressure reducing portions (gaps) formed along the circumferential direction of the cross section, and carbonated water flows continuously into each pressure reducing portion). On the other hand, the head of the inner resistance body in the multi-structured resistance body is sunken relative to the head of the outer resistance body and has a step. The head of the multi-structured resistance body is generally conical in shape with the same inclination angle as the expansion portion of the carbonated water introduction member. Therefore, even in the initial stage of the introduction of carbonated water, at the pressure reducing portion (gap) on the circumference of the concentric circle on the central axis side of the resistance body, the carbonated water flowing on the conical inclined surface is blocked by the step to allow the carbonated water to continuously flow into the pressure reducing portion (gap). Therefore, a sudden change in pressure can be suppressed, that is, a reduction in the gas amount caused by the separation of carbon dioxide can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A beverage supply nozzle according to an embodiment of the present invention is shown. Figure 1 (a) is a side view showing the overall structure of the beverage supply nozzle, Figure 1 (b) is Figure 1 (a) A-A line cross-sectional view.

[0024] Figure 2 express Figure 1 The tubular body of the beverage supply nozzle, Figure 2 (a) is a stereoscopic view of the tubular body viewed from above. Figure 2 (b) is a cross-sectional view of the tubular body.

[0025] Figure 3 express Figure 1 A carbonated water introduction member of a beverage supply nozzle, Figure 3 (a) is a perspective view of the carbonated water introduction member viewed from obliquely above, Figure 3 (b) is Figure 3 (a) BB line cross-sectional view.

[0026] Figure 4 express Figure 1 The outer resistance body constituting the resistance body of the beverage supply nozzle, Figure 4 (a) is a three-dimensional view of the outer resistance body viewed from obliquely below. Figure 4 (b) is the side view of the outer resistance body. Figure 4 (c) is Figure 4 (b) C-C line cross-sectional view.

[0027] Figure 5 yes Figure 1 A side view of an inner resistance body constituting a resistance body of a beverage delivery nozzle.

[0028] Figure 6 Yes means Figure 1 Cross-sectional view of the resistance body.

[0029] Figure 7 Yes means Figure 5 A modification of the inner resistance body constituting the resistance body, Figure 7 (a) is a three-dimensional view of the inner resistance body viewed from obliquely below. Figure 7 (b) is Figure 7 (a) D-D line cross-sectional view.

[0030] Figure 8 This is a schematic diagram showing a flow path system to which a conventional beverage supply nozzle is applied and a cross section of the beverage nozzle. DETAILED DESCRIPTION

[0031] Hereinafter, a beverage supply nozzle in a beverage supply device such as a beverage machine according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0032] like Figure 1 As shown, the beverage supply nozzle NZ includes a hollow tubular body 1 , a resistor 2 inserted into the hollow tubular body 1 , and a carbonated water introduction member 3 integrally mounted on the upper portion of the hollow tubular body 1 .

[0033] The hollow tubular body 1 is a synthetic resin molded product formed of ABS resin with a surface roughness of 0.1 μm or less. The cross-section of the upstream side of the tubular body 1 is formed into a circular shape, and the upstream side of the tubular body 1 is formed into a relatively large diameter as a storage space for the resistance body 2. On the other hand, the downstream side of the tubular body 1 is funnel-shaped and reaches a small-diameter spray port 11. The upstream side of the relatively large-diameter tubular body 1 includes a connection area SS of the carbonated water introduction member 3 and a resistance body storage area RS for storing the resistance body 2. The resistance body storage area RS of the tubular body 1 is a portion abutted against the outer wall of the resistance body 2 stored therein, and the upper side of the resistance body storage area RS is the connection area SS. In the connection area SS, a thread groove 331 (also refer to Figure 3 ) threaded thread groove 12 (see also Figure 2 ).

[0034] The resistor housing area RS of the tubular body 1 is formed with a slope in such a way that the diameter of the lower end side of the resistor housing area RS (the downstream side where carbonated water is ejected) is smaller than the diameter of the upper end side of the resistor housing area RS (the upstream side where carbonated water is introduced). Figure 2 As shown in (b), relative to the vertical line segment VL, the inner wall and the outer wall of the tubular body 1 in the resistance body storage area RS have a slope (for example, a slope of 3 degrees) in which the diameter gradually decreases from the upstream side of the resistance body storage area RS toward the downstream side of the resistance body storage area RS.

[0035] like Figure 2 As shown in (b), a stopper 1a protruding toward the inside is integrally formed on the inner wall surface of the tubular body 1 at the lower end area of ​​the resistance body storage area RS. The stopper 1a constitutes a descending prevention member. The stopper 1a engages with the lower edge of the resistance body 2 described later to prevent the resistance body 2 from moving downward. The stopper 1a is arranged on the inner wall surface of the tubular body 1 in a circumferentially dispersed manner (three stoppers are arranged at intervals of 120 degrees in this example).

[0036] In addition, a crescent-shaped cold water passage 113 is formed on the lower side of the tubular body 1, which is separated from the carbonated water passage 111 by a dividing wall 112 having a crescent-shaped cross section, and a cold water introduction passage (not shown) is installed in a form of being positioned by a positioning protrusion 114 in a form of supplying cold water to the cold water passage 113 through an opening formed on the outer wall of the cold water passage 113, but the cold water introduction passage is not a necessary structure, so it is omitted here. In addition, reference numeral 115 is a mounting piece for mounting on the beverage machine.

[0037] The carbonated water introduction member 3 functions as a cover that closes the hollow tubular body 1. Figure 3 As shown, the carbonated water introduction member 3 is provided with an O-ring 30 (see Figure 1 ) and a thread groove 331 threadably connected to the thread groove 12 provided on the tubular body 1. The carbonated water introduction member 3 is integrated with the tubular body 1 by being threadedly fixed to the upper part of the tubular body 1 via an O-ring 30. A carbonated water introduction pipeline 31 protruding upward is formed in the carbonated water introduction member 3, and the lower part of the carbonated water introduction member 3 is formed as an expansion portion 32 expanding in a funnel shape with the axis of the carbonated water introduction pipeline 31 as the center. The inclination angle of the funnel-shaped expansion portion 32 is consistent with the inclination angle of the cone of the conical head of the resistance body 2 described later, and an introduction passage is formed between the expansion portion 32 and the head of the resistance body 2. The interval of the introduction passage is constant, so that the pressure of the carbonated water is constant. In the carbonated water introduction pipeline 31, a solenoid valve V1 is connected to the carbonated water introduction pipeline 31 via the solenoid valve V1. Figure 8 The carbonator 107 shown is a supply line for high-pressure carbonated water. In this embodiment, the carbonated water introduction member 3 is formed into a hollow shape with a space between the carbonated water introduction line 31 and the outer wall 33, but the carbonated water introduction member 3 is not limited to being hollow and may also be solid.

[0038] The resistance body 2 is divided into a plurality of parts in the radial direction, and in this embodiment, is divided into a double structure into an outer resistance body 21 and an inner resistance body 22. The outer resistance body 21 and the inner resistance body 22 are synthetic resin molded products formed of ABS resin with a surface roughness of 0.1 μm or less.

[0039] like Figure 4 As shown, the outer resistance body 21 is formed into a hollow tube. The cross section of the inner wall of the hollow tube-shaped outer resistance body 21 is formed into a circular shape, while the cross section of the outer wall of the hollow tube-shaped outer resistance body 21 is formed into a polygonal shape (for example, a regular twenty-seven-sided polygon). By forming the cross section of the outer wall of the outer resistance body 21 into a polygonal shape, a plurality of ridges 211 and flat surfaces 212 are provided on the outer wall of the outer resistance body 21. In addition, as shown in FIG. Figure 4As shown in (c), the outer wall and the inner wall of the outer resistance body 21 have a slope (for example, a slope of 3 degrees) with respect to the vertical line segment VL, in which the diameter gradually decreases from the upstream side to the downstream side. Here, the diameter of the circle connecting the ridges 211 of the upper end (head) of the outer wall of the outer resistance body 21 is set to a diameter consistent with the diameter of the inner wall of the upper end of the resistance body storage area RS of the tubular body 1, and the diameter of the circle connecting the ridges 211 of the lower end of the outer wall of the outer resistance body 21 is set to a diameter consistent with the diameter of the inner wall of the lower end of the resistance body storage area RS of the tubular body 1. In addition, a stopper 21a protruding toward the inside is integrally formed on the lower side of the inner wall of the outer resistance body 21. The stopper 21a engages with the lower edge of the inner resistance body 22 described later to prevent the inner resistance body 22 from moving downward. The stoppers 21a are arranged circumferentially dispersed (three are arranged at intervals of 120 degrees in this example) on the inner wall surface of the outer resistance body 21. The stoppers 21a are used to prevent the inner resistance body 22 from moving downward even when the outer resistance body 21 and the inner resistance body 22 are made of synthetic resin formed of ABS resin with a surface roughness of 0.1 μm or less, but are not necessarily required.

[0040] In addition, the upper end (head) of the outer resistance body 21 is formed as an inclined surface 213 that narrows from the outer wall to the inner wall, and the lower end of the outer resistance body 21 is formed as an inclined surface 214 that narrows from the outer wall to the inner wall. The inclination angle of the inclined surface 213 of the upper end (head) is configured to be consistent with the inclination angle of the inclined surface of the conical head 220 of the inner resistance body 22 described later. In addition, on the inner wall side of the upper end (head) of the outer resistance body 21, an inclined surface 215 is formed that is inclined in the opposite direction to the inclined surface 213 (see Figure 4 In (c), the connecting portion between the inclined surface 213 and the inclined surface 215 forms a peak serving as a watershed.

[0041] like Figure 5As shown, the inner resistance body 22 has a conical head 220. The inclination angle of the conical head 220 is consistent with the inclination angle of the funnel-shaped expansion portion 32 of the carbonated water introduction member 3. The cross section of the outer wall of the inner resistance body 22 is a polygonal shape (for example, a regular twenty-sided polygon), and the inner resistance body 22 is formed into a polygonal column having a plurality of ridges 221 and flat portions 222. In addition, the outer wall of the inner resistance body 22 has a slope (for example, a slope of 3 degrees) with respect to the vertical line segment VL, and the diameter gradually decreases from the upstream side to the downstream side. The diameter of the circle connecting the upper ends of the ridges 221 of the outer wall of the inner resistance body 22 (in other words, the bottom of the conical head 220) is set to a diameter that is consistent with the diameter of the upper end of the inner wall of the outer resistance body 21, that is, the diameter of the lower side of the inclined surface 215 forming the peak of the upper end of the outer resistance body 21. Therefore, the diameter of the circle connecting the upper ends of the ridges 221 of the outer wall of the inner resistance body 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 resistance body 21 .

[0042] In this embodiment, the inner resistance body 22 is formed solid, but it can also be formed as Figure 7 It is hollow as shown in the modified example. Figure 7 The inner resistance body 22A shown is formed to be hollow with a cross-shaped reinforcement wall 223 remaining inside, and has the same Figure 5 The inner resistance body 22A has the same structure as the inner resistance body 22 shown in the figure. That is, the inner resistance body 22A has a conical head 220A, and is formed in a polygonal column shape with a plurality of ridges 221A and flat surfaces 222B on the outer wall. In addition, the outer wall of the inner resistance body 22A has a slope (for example, a slope of 3 degrees) with respect to the vertical line segment VL, in which the diameter gradually decreases from the upstream side to the downstream side.

[0043] like Figure 6As shown, the resistance body 2 is integrated by inserting the inner resistance body 22 in a nested manner from the upper end opening of the outer resistance body 21 which is hollow and tubular. The inner resistance body 22 inserted into the outer resistance body 21 is pressed in until the lower edge of the inner resistance body 22 abuts against the stopper 21a provided on the inner wall surface of the outer resistance body 21 and protruding toward the inner side. In this case, in the process of descending until the lower edge of the inner resistance body 22 abuts against the stopper 21a of the outer resistance body 21, the plurality of ridges 221 of the inner resistance body 22 gradually come into contact with the inner wall of the outer resistance body 21, and at the moment when the lower edge of the inner resistance body 22 abuts against the stopper 21a of the outer resistance body 21, the plurality of ridges 221 of the inner resistance body 22 are in close contact with the inner wall of the outer resistance body 21. Furthermore, the structure is such that, in a state where the lower edge of the inner resistance body 22 is in contact with the stopper 21a of the outer resistance body 21, the inclination angle of the inclined surface of the upper end portion (head portion) of the outer resistance body 21 coincides with the inclination angle of the inclined surface of the conical head portion 220 of the inner resistance body 22, so that the head portion of the resistance body 2 is conical in shape as a whole, and the inclination angle of the conical head portion coincides with the inclination angle of the funnel-shaped expansion portion 32 of the carbonated water introduction member 3. In this case, since the bottom of the conical head portion 220 of the inner resistance body 22 is located at the upper end of the inner wall of the outer resistance body 21 (the lower side of the inclined surface 215 forming the peak of the upper end portion of the outer resistance body 21), the bottom of the conical head portion 220 of the inner resistance body 22 is sunken relative to the peak of the upper end portion of the outer resistance body 21 (the connecting portion between the inclined surface 215 and the inclined surface 213) and has a step (see FIG. 2 ). Figure 6 ).

[0044] In this way, in the resistance body 2 in which the inner resistance body 22 is nestedly inserted into the hollow outer resistance body 21 to form an integrated body, a plurality of gaps (not shown) are formed along the circumferential direction of the cross-sectional circle between the entire planar portion (outer wall surface) 222 of the inner resistance body 22 and the inner wall surface of the outer resistance body 21, and these plurality of gaps formed along the circumferential direction constitute a pressure reducing portion, as described in patent document 2.

[0045] The resistor 2 assembled in this way is inserted into the interior of the tubular body 1 from the upper end opening of the hollow tubular body 1 in a nested manner and installed in the resistor storage area RS. The resistor 2 inserted into the hollow tubular body 1 is pressed in until the lower edge of the outer resistor 21 constituting the resistor 2 abuts against the stopper 1a protruding inwardly provided on the inner wall surface of the hollow tubular body 1. Here, the position of the stopper 1a provided in the lower end area of ​​the resistor storage area RS in the inner wall of the tubular body 1 is set to the following position, that is, when the resistor 2 is inserted into the tubular body 1 in a nested manner, the stopper 1a is engaged with the lower edge of the outer resistor 21 constituting the resistor 2 in a state where the edge portion of the resistor 2 (edge ​​portion 211 of the outer wall of the outer resistor 21) is in close contact with the inner wall surface of the tubular body 1 and the resistor 2 is fixed to the tubular body 1. Therefore, in the process of descending until the lower end of the outer resistance body 21 abuts against the stopper 1a of the hollow tubular body 1, the plurality of ridges 211 of the outer resistance body 21 gradually contact the inner wall of the hollow tubular body 1, and at the moment when the lower edge of the outer resistance body 21 abuts against the stopper 1a of the hollow tubular body 1, the plurality of ridges 211 of the outer resistance body 21 are in close contact with the inner wall of the hollow tubular body 1. In this way, when the resistance body 2 is inserted into the tubular body 1 in a nested manner and integrated, a plurality of gaps (not shown) are formed between all the flat surfaces of the resistance body 2 (all the flat surfaces 212 of the outer resistance body 21) and the inner wall surface of the tubular body 1 along the circumferential direction of the cross-sectional circle, and these plurality of gaps formed along the circumferential direction constitute a pressure reducing portion, as described in Patent Document 2.

[0046] In the beverage supply nozzle NZ of this structure, the carbonated water is pressure-fed to the carbonated water introduction pipe 31 (see Figure 1 ) is evenly dispersed along the conical head 220 of the resistor 2 (inner resistor 22), and then ejected from the ejection port 11 through the gap (pressure reducing portion) formed between the entire flat portion 222 of the inner resistor 22 and the inner wall surface of the outer resistor 21 and the gap (pressure reducing portion) formed between the entire flat portion 212 of the resistor 2 (outer resistor 21) and the inner wall surface of the tubular body 1.

[0047] Here, the inventors' experiments revealed that when the tubular body 1, the outer resistance body 21 and the inner resistance body 22 are made of synthetic resin materials, carbonated water impacts the surface (convex and concave surface) of the synthetic resin material to separate carbon dioxide, but the separation of carbon dioxide when formed from ABS resin having a surface roughness of less than 0.1 μm is less than the separation of carbon dioxide when formed from synthetic resin materials such as PA resin, PPE resin, PP resin, etc. having a surface roughness of more than 0.1 μm. In addition, when the tubular body 1 is formed of ABS resin having a surface roughness of 0.1 μm or less, the frictional resistance between the tubular body 1 and the outer resistance body 21 is small, and the frictional resistance between the outer resistance body 21 and the inner resistance body 22 is small. Therefore, the pressure applied to the outer resistance body 21 and the inner resistance body 22 by the carbonated water introduced from the carbonated water introduction pipe 31 so as to move the outer resistance body 21 and the inner resistance body 22 downward promotes the outer resistance body 21 and the inner resistance body 22 to move downward, but the outer resistance body 21 and the inner resistance body 22 are prevented from moving downward by the stopper 1a provided on the inner wall of the tubular body 1 and the stopper 21a provided on the outer resistance body 21. Therefore, ABS resin having a surface roughness of 0.1 μm or less can be used as the synthetic resin material constituting the resistance body 2 and the hollow tubular body 1, and the reduction in the amount of gas in the pressure reducing portion can be suppressed.

[0048] In addition, in the beverage supply nozzle NZ of this embodiment, the head of the resistor 2 is generally conical in shape with the same inclination angle as the expansion portion of the carbonated water introduction member, and has a step in the form of a bottom of the conical head 220 of the inner resistor 22 being sunken relative to the peak of the upper end of the outer resistor 21. Therefore, even in the initial stage of introducing carbonated water from the carbonated water introduction pipe 31, at the multiple pressure reducing portions (gaps) formed along the circumferential direction of the cross-sectional circle between the inner resistor 22 and the outer resistor 21, the carbonated water flowing on the conical inclined surface is blocked by the steps, so that the carbonated water flows continuously into the pressure reducing portions (gaps), thereby suppressing abrupt changes in pressure. That is, in the absence of the step, the flow of carbonated water into the pressure reducing portions (gaps) becomes intermittent, the pressure changes abruptly, and the gas amount is reduced due to the separation of carbon dioxide. In contrast, since the carbonated water flows continuously into the pressure reducing portions (gaps), the abrupt change in pressure can be suppressed, thereby suppressing the gas amount reduction caused by the separation of carbon dioxide.

[0049] As described above, in the beverage supply nozzle NZ of this embodiment, the carbonated water produced by mixing cold water and carbon dioxide is depressurized by the resistor 2, and then the carbonated water is ejected, wherein the beverage supply nozzle NZ comprises: a carbonated water introduction member 3, to which the high-pressure carbonated water is supplied; a hollow tubular body 1, which ejects the carbonated water introduced through the carbonated water introduction member 3 from a ejection port 11 at the other end; and a resistor 2, which is arranged inside the tubular body 1, and the resistor 2 is arranged in the same radial direction as the tubular body 1 on the inner wall surface of the tubular body and the resistor 2. The body 1 has a plurality of gaps as pressure reducing portions formed in the circumferential direction between the outer wall surfaces adjacent to the inner wall surfaces of the body 1, the cross section of one of the outer wall surface and the inner wall surface of the tubular body is formed in a polygonal shape, and the cross section of the other of the outer wall surface and the inner wall surface of the tubular body is formed in a circular shape, the resistance body 2 is a multiple structure divided in the radial direction (for example, a double structure of an outer resistance body 21 and an inner resistance body 22), and a plurality of gaps as pressure reducing portions are formed in the circumferential direction between the inner wall surface (the inner wall surface of the outer resistance body 21) and the outer wall surface (the outer wall surface of the inner resistance body 22) adjacent to each other in the radial direction. The shape of the gap in the pressure reduction portion is that the cross section of one of the radially adjacent inner wall surface (the inner wall surface of the outer resistance body 21) and the outer wall surface (the outer wall surface of the inner resistance body 22) is formed into a polygonal shape, and the cross section of the other of the radially adjacent inner wall surface (the inner wall surface of the outer resistance body 21) and the outer wall surface (the outer wall surface of the inner resistance body 22) is formed into a circular shape, and the hollow tubular body 1 and the multi-structured resistance body 2 respectively have a slope of gradually decreasing diameter from the upstream side of introducing carbonated water toward the downstream side of spraying carbonated water. In the beverage supply nozzle NZ, in the hollow tubular body An anti-descent component (stopper 1a) for preventing the resistance body (outer resistance body 21) from descending is provided between the inner wall surface of 1 and the resistance body (outer resistance body 21) located outermost in the radial direction among the multi-structured resistance bodies 2. Therefore, even if the resistance body 2 intends to move downward under the action of the high-pressure carbonated water introduced from the carbonated water introduction member 3, the anti-descent component (stopper 1a) can be used to prevent the resistance body 2 from descending. Therefore, the following effect is achieved, namely, it is possible to provide a beverage supply nozzle that can suppress the reduction of the gas amount in the pressure reducing portion and ensure the passing amount of carbonated water per unit time.

[0050] In addition, in the above-mentioned embodiment, as the best form of the anti-descent component, the stopper 1a is described, which is provided on the inner wall surface of the hollow tubular body 1 and engages with the outermost outer resistance body 21 in the radial direction of the double-structured resistance body 2 to prevent the outer resistance body 21 from descending. However, the following structure can also be adopted: a stopper protruding outward is formed on the outer wall of the outer resistance body 21, and on the other hand, a groove (a groove extending in the vertical direction and becoming deeper as it goes downward) for accommodating the stopper of the outer resistance body 21 is formed on the inner wall of the tubular body, or a descending prevention member is provided, which is formed by a member independent of the hollow tubular body 1 and is locked to the hollow tubular body 1 in a form of engaging with the inner wall surface of the hollow tubular body 1 to prevent the resistance body 2 from descending. In addition, in the above-mentioned embodiment, it is described that the resistance body 2 is a double structure composed of the outer resistance body 21 and the inner resistance body 22, but the resistance body 2 is not limited to a double structure, and can be a structure of more than two layers. Furthermore, in the above-mentioned embodiment, the cross section of the inner wall surface of the tubular body is formed into a circular shape, the cross section of the outer wall surface of the outer resistance body 21 and the cross section of the outer wall surface of the inner resistance body 22 are formed into a polygonal shape, and the cross section of the inner wall surface of the outer resistance body 21 is formed into a circular shape, but it is also possible to form the cross section of the inner wall surface of the tubular body into a polygonal shape, the cross section of the outer wall surface of the outer resistance body 21 and the cross section of the outer wall surface of the inner resistance body 22 into a circular shape, and the cross section of the inner wall surface of the outer resistance body 21 into a polygonal shape. Therefore, the beverage supply nozzle of the present invention is not limited to the nozzle shown in the embodiment.

[0051] Description of Reference Numerals

[0052] NZ, beverage supply nozzle; 1, tubular body; 1a, stopper (anti-drop component); 2, resistance body; 3, carbonated water introduction member; 11, spray outlet; 21, outer resistance body; 21a, stopper; 22, inner resistance body; 31, carbonated water introduction pipeline; 211, 221, ridges; 212, 222, flat parts.

Claims

1. A beverage supply nozzle for spraying carbonated water after reducing the pressure of high-pressure carbonated water generated by mixing cold water and carbon dioxide, characterized in that: The beverage supply nozzle has: a carbonated water introduction member to which the high-pressure carbonated water is supplied; a hollow tubular body that ejects the carbonated water introduced through the carbonated water introduction member from an ejection port at the other end; and A resistance body is arranged inside the tubular body, and the resistance body is in a form in which a plurality of gaps as pressure reducing portions are formed along the circumferential direction of the cross section between the inner wall surface of the tubular body and the outer wall surface adjacent to the inner wall surface of the tubular body in the radial direction of the resistance body, the cross section of one of the outer wall surface and the inner wall surface of the tubular body is formed in a polygonal shape, and the cross section of the other of the outer wall surface and the inner wall surface of the tubular body is formed in a circular shape, The resistance body is a multiple structure divided in the radial direction, and is in a form in which a plurality of gaps as pressure reducing portions are formed in the circumferential direction between the inner wall surface and the outer wall surface adjacent in the radial direction, the cross section of one of the inner wall surface and the outer wall surface adjacent in the radial direction is formed in a polygonal shape, and the cross section of the other of the inner wall surface and the outer wall surface adjacent in the radial direction is formed in a circular shape, The hollow tubular body and the multi-structured resistance body each have a slope of gradually decreasing diameter from the upstream side where carbonated water is introduced toward the downstream side where carbonated water is ejected. An anti-drop component for preventing the resistance body from dropping is provided between the hollow tubular body and the resistance body located at the outermost side in the radial direction among the resistance bodies of the multi-structure. The carbonated water introduction member is formed with a carbonated water introduction pipeline protruding upward, the lower portion of the carbonated water introduction member is formed as an expansion portion expanding in a funnel shape with the axis of the carbonated water introduction pipeline as the center, and the head of the multi-structured resistance body is generally in a conical shape consistent with the inclination angle of the expansion portion of the carbonated water introduction member. The upper end portion of the outer resistance body, which is the resistance body located on the outside of the multi-structure resistance body, is formed with an inclined surface on the inner wall side and an inclined surface on the outer wall side, and a connecting portion between the inclined surface on the inner wall side and the inclined surface on the outer wall side forms a peak as a watershed. The bottom of the conical head has a step in the form of sinking relative to the connecting portion between the inclined surface on the inner wall side and the inclined surface on the outer wall side of the outer resistance body, and the conical head is the upper end portion of the inner resistance body as the resistance body located on the inner side of the multi-structured resistance body. The diameter of the circle connecting the upper end of the ridge of the outer wall of the inner resistance body, i.e., the bottom of the conical head of the inner resistance body, is set to be consistent with the diameter of the lower side of the inclined surface, and the inclined surface forms the peak of the upper end of the outer resistance body. The anti-drop component is a stopper provided on the inner wall surface of the hollow tubular body and engaging with the outer resistance body to prevent the resistance body from dropping. The hollow tubular body and the resistor are formed of ABS resin having a surface roughness of 0.1 μm or less.

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