JP2009052672A - Vacuum breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the size of a body by minimizing increase in component shape by keeping of draft in a component. <P>SOLUTION: Water supply passage members 22a, 22c of a water supply system 50A and a water discharge passage member 22b of a water discharge system 50B are provided separately from a body 21. In this example, the maximum inside diameter point P2 at the other end of a body internal passage 21a' with a preset draft of about 1° from the minimum inside diameter point P1 (7 mm) is formed about 12 mm. On the other hand, the minimum inside diameter point Q1 at one end of the passage member 22a with a preset draft of about 1° from the minimum inside diameter point Q1 (7 mm) is formed about 8 mm. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an atmospheric pressure vacuum breaker installed in a garbage disposal apparatus. Specifically, the first and second water supply side flow path members of the water supply system in the vacuum breaker main body and the water discharge side flow path member of the water discharge system are separated from the main body so that the components can be subdivided. In addition, the size of the main body can be reduced by minimizing the increase in the size of the part shape by keeping the draft of the part in the molding process.

  In the case of garbage disposal equipment that is often used in apartment buildings in recent years, tap water used as water to flow down garbage crushed material is supplied manually during operation. In some cases, it is supplied automatically.

  In the case of automatic water supply, an automatic supply port for tap water supplied to the garbage disposal device is provided. The tap water is not supplied directly to the supply port, but is supplied via a vacuum breaker.

  This vacuum breaker is provided so that tap water and the water (sewage) on the garbage treatment equipment side do not mix directly, and the tap water is once led to this vacuum breaker, and from the vacuum breaker The discharged tap water is guided to the water supply port of the garbage disposal device.

  If the sewage tries to reversely flow from the drainage pipe side connected to the drainage side of the garbage disposal equipment or the pressure on the water pipe side of tap water becomes negative due to water breakage, etc., the water level on the drainage pipe side will rise. However, since the closing valve provided in the vacuum breaker is open to the atmosphere, the water level on the drain pipe side is prevented from rising by introducing atmospheric pressure. Thereby, it is suppressed that the water level by the side of a drain pipe raises to the closing valve side, and it is avoided that sewage mixes with tap water.

  In connection with such a conventional example, Patent Document 1 discloses an atmospheric pressure type vacuum breaker. According to this vacuum breaker, the primary side flow path and the secondary side flow path are provided inside. When the electromagnetic valve is opened, tap water flows into the primary side flow path, pushes up the valve body, flows into the secondary side flow path, and is supplied to the pulverization apparatus.

JP 2006-342944 A (FIG. 3)

  By the way, according to the vacuum breaker described in Patent Document 1 according to the conventional example, the primary side flow path and the secondary side flow path provided inside the main body are integrally formed in the main body, and therefore the mold is removed. Requires a draft for.

  In general, the inner diameter of the flow path of the vacuum breaker is required to be at least 7 mm. This is because the vacuum breaker needs to allow at least 8 liters of water to flow every minute.

  Under these conditions, it is necessary to secure at least 7 mm of the inner diameter formed by the narrowest portion of the inner diameter of the primary flow path and the secondary flow path, that is, the insertion tip of the mold. At this time, since the draft angle of the mold is applied toward the rear end portions of the primary side flow path and the secondary side flow path, the inner diameter of each flow path integrally molded with the main body is increased. For this reason, there exists a problem that the size of a vacuum breaker main body becomes large.

  A vacuum breaker is applied to a garbage disposal device, for example, and is often installed around a sink in a kitchen. The kitchen is often required to have a stylish design. If the size of the vacuum breaker body increases, the aesthetics of the kitchen may be impaired.

  Therefore, the present invention solves the problems related to the conventional example, and can minimize the size of the main body by minimizing the size of the component shape by maintaining the draft angle of the component. The purpose is to provide a vacuum breaker.

  In order to solve the above-described problems, a vacuum breaker according to the present invention is an atmospheric pressure type vacuum breaker installed in a water supply device, and a water supply system that guides water from an upstream side to the uppermost position, and the water supply system A water discharge system that guides water led to the uppermost position to the downstream side, and the water supply system is coupled to a water supply side main body internal flow path provided inside the main body and one end of the water supply side main body internal flow path A first water supply side flow path member and a second water supply side flow path member coupled to the other end of the water supply side main body internal flow path, and the water discharge system includes the second water supply side. One end is connected to the flow path member, and includes a water discharge side main body internal flow path provided inside the main body, and a water discharge side flow path member coupled to the other end of the water discharge side main body internal flow path. It is what.

  According to the vacuum breaker according to the present invention, the first and second water supply side flow path members of the water supply system and the water discharge side flow path member of the water discharge system are separate from the main body. Thereby, since the component parts can be subdivided, the increase in the size of the parts due to maintaining the draft in the molding process can be minimized.

  According to the vacuum breaker according to the present invention, the first water supply side flow path member coupled to one end of the water supply side main body internal flow path, and the second water supply coupled to the other end of the water supply side main body internal flow path. A side flow path member and a water discharge side flow path member coupled to the other end of the water discharge side main body internal flow path are provided.

  With this configuration, the first and second water supply side flow path members of the water supply system and the water discharge side flow path member of the water discharge system can be separate from the main body. Thereby, since the component parts can be subdivided, it is possible to minimize the increase in the size of the part shape by maintaining the draft of the part in the molding process. Therefore, the size of the main body can be reduced and the aesthetic appearance of the installation location can be suitably maintained. In addition, since the subdivided parts can be manufactured as common parts, the manufacturing cost can be reduced.

  Subsequently, an embodiment of a vacuum breaker according to the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic view showing a configuration example of a garbage disposal unit 100 to which a vacuum breaker (negative pressure breaking device) 2 according to the present invention is applied. A garbage disposal unit 100 shown in FIG. 1 includes a garbage disposal apparatus 1, a vacuum breaker 2, a solenoid valve 5, and a control unit 8. The garbage disposal apparatus 1 is installed in a drain outlet of a sink 4 of a kitchen, and includes a crushing chamber case (hopper) 1a, a lid 1b, and a drive unit 1c.

  In the crushing chamber case 1a, a crushing unit having a rotary crushing blade (not shown) is incorporated therein. This rotary crushing blade is fitted to the rotary shaft of the motor 1h (see FIG. 2) of the drive unit 1c. When this drive part 1c rotates the motor 1h, a rotary crushing blade rotates. Thereby, the garbage put into the crushing chamber case 1a is crushed by the rotary crushing blade.

  The crushing chamber case 1a has a charging opening 1f at the top, and a lid 1b is detachably attached to the charging opening 1f. In this example, the lid body 1b is set in a closed state by rotating the lid body 1b by a predetermined angle in a predetermined direction with the lid body 1b mounted in the insertion opening 1f. When this closed state is set, the lid 1b is locked to the crushing chamber case 1a.

  The lid lock detection sensor 9 shown in FIG. 2 detects the locked state of the lid 1 b and outputs detection data D 1 to the control unit 8. The control unit 8 drives and controls the drive unit 1c based on the input detection data D1. The drive part 1c rotates the rotary crushing blade provided in the crushing chamber case 1a. The control unit 8 controls the opening and closing of the electromagnetic valve 5 based on the input detection data D1.

  The electromagnetic valve 5 is provided between the first branch pipe 6a branched from the water pipe 6 and the water supply side flow pipe 10a (hereinafter, also simply referred to as flow pipe 10a) in the process of reaching the garbage disposal apparatus 1. It intervenes and opens and closes a valve (not shown) to control the flowing water from the water pipe 6.

  A vacuum breaker 2 is interposed between the water supply side channel pipe 10a and the water discharge side channel pipe 10b (hereinafter also simply referred to as channel pipe 10b) to which the garbage disposal apparatus 1 is connected. The vacuum breaker 2 is provided to prevent the tap water and the water (sewage) on the side of the garbage treatment apparatus 1 from being mixed directly, and the tap water is once guided to the vacuum breaker, Tap water discharged from the vacuum breaker 2 is guided to the garbage disposal apparatus 1.

  In this example, the vacuum breaker 2 discharges the tap water supplied from the water supply side channel pipe 10a to the water discharge side channel pipe 10b. Moreover, when water supply carelessly occurs when water is supplied to the garbage disposal apparatus 1, negative pressure due to the reverse siphon action may be generated in the water supply system (channel pipes 10a and 10b). At this time, due to the negative pressure, the sewage in the garbage treatment apparatus 1 tends to flow back to the water pipe 6 through the water discharge side flow pipe 10b, the vacuum breaker 2, the water supply side flow pipe 10a, and the like. At this time, the vacuum breaker 2 takes in air from the outside by the negative pressure and instantaneously destroys the negative pressure, thereby preventing the sewage from flowing backward from the garbage treatment apparatus 1 to the water discharge side flow pipe 10b. Of course, the vacuum breaker 2 acts so as to destroy the negative pressure when water breakage or the like occurs on the water pipe 6 side and a negative pressure is generated even when the garbage disposal device 1 is not in operation.

  The vacuum breaker 2 protrudes from the overflow edge (top plate) 4 a of the sink 4. This is to prevent the sewage from flowing backward from the water discharge side flow pipe 10b connected to the garbage disposal device 1 when the sink 4 is full of washing water (sewage) or the like. For example, when the sink 4 is full of washing water (sewage), the water level of the washing water (sewage) in the sink 4 does not rise above the overflow edge 4a, so that the washing that rises by flowing backward in the water discharge side channel pipe 10b. Water (sewage) also overflows and does not rise above the edge 4a. Thereby, the vacuum breaker 2 protruding from the overflow edge 4a prevents the washing water (sewage) from flowing backward from the water discharge side flow pipe 10b even when the sink 4 is filled with the washing water (sewage). it can. Note that the vacuum breaker 2 need not be provided on the overflow edge (top plate) 4a as long as the installation standard based on the Waterworks Law or the like can be satisfied.

  The tap water supplied from the water discharge side channel pipe 10b to the crushing chamber case 1a of the garbage disposal apparatus 1 is supplied to the lid 1b and supplied from the lid 1b to the inside of the crushing chamber case 1a. A drain pipe 7 is connected to the lower part of the crushing chamber case 1a. The finely crushed garbage is discharged from the drain pipe 7 by the water supplied from the water discharge side flow pipe 10b. Thus, the garbage processing unit 100 to which the vacuum breaker 2 is applied is configured.

  FIG. 2 is a block diagram illustrating a configuration example of a control system of the garbage processing unit 100. The control unit 8 shown in FIG. 2 includes a CPU 8a, a RAM 8b, a ROM 8c, an I / O interface 8d, and a system bus 8e.

  A ROM (Read Only Memory) 8c is connected to a CPU (Central Processing Unit) 8a via a system bus 8e. The ROM 8c stores a control program for the garbage processing unit 100 and the like. This control program is a program for controlling the drive unit 1c and the electromagnetic valve 5 of the garbage disposal device 1 based on the detection data D1 of the sensor 9.

  A RAM (Random Access Memory) 8b is connected to the CPU 8a via a system bus 8e. When the main power source of the garbage processing unit 100 is turned on, the control program stored in the ROM 8c is developed in the RAM 8b by the CPU 8a.

  The CPU 8a is connected to a lid lock detection sensor 9 via an I / O (Input / Output) interface 8d. When the lid 1b shown in FIG. 1 is mounted and locked in the charging opening 1f of the crushing chamber case 1a, the sensor 9 detects the locked state of the lid 1b and outputs detection data D1 to the CPU 8a. .

  The CPU 8a outputs the valve drive data D2 to the drive control unit 5a based on the input detection data D1. The drive control unit 5a controls to open the movable valve 5b by exciting the coil of the movable valve 5b based on the valve drive data D2. Thereby, tap water is supplied into the crushing chamber case 1a of the garbage disposal apparatus 1 through the water supply side channel pipe 10a, the vacuum breaker 2, and the water discharge side channel pipe 10b.

  Further, the CPU 8a outputs motor drive data D3 to the drive control unit 1g based on the input detection data D1. The drive controller 1g generates a control signal S3 from the motor drive data D3 and outputs it to the crushing blade rotation motor 1h. The motor 1h rotates a rotary crushing blade (not shown) provided in the crushing chamber case 1a based on the control signal S3.

  The rotating crushing blade is rotated in a state where tap water is continuously supplied to the inside of the crushing chamber case 1a, and the crushing processing of garbage is performed for a predetermined time. During this time, the finely crushed garbage is discharged from the drain pipe 7 shown in FIG.

  After a predetermined time has elapsed for the crushing process, the CPU 8a outputs motor stop data D3 'to the drive control unit 1g. The drive control unit 1g generates a control signal S3 'from the motor drive data D3' and outputs it to the motor 1h for crushing blade rotation. The motor 1h stops a rotary crushing blade (not shown) provided in the crushing chamber case 1a based on the control signal S3 '.

  At the same time, the CPU 8a outputs the valve drive data D2 'to the drive control unit 5a. Based on this valve drive data D2 ', the drive control unit 5a performs control to stop the excitation of the coil of the movable valve 5b and close the movable valve 5b. Thereby, water supply to the vacuum breaker 2 is stopped, and water supply to the inside of the crushing chamber case 1a of the garbage disposal apparatus 1 is also stopped.

  Next, details of the vacuum breaker 2 according to the present invention will be described. FIG. 3 is a perspective view showing a configuration example of the vacuum breaker 2 according to the present invention. The vacuum breaker 2 shown in FIG. 3 is an atmospheric pressure type vacuum breaker, and includes a cover 20, a main body 21, a first water supply side flow path member 22 a, a water discharge side flow path member 22 b, and a nut member 23. A cover 20 is attached to the main body 21. A cover air intake 20 </ b> A is provided on the upper portion of the cover 20. The cover air inlet 20A is composed of four air holes 20a to 20d opened in a long hole shape, and takes in air from the outside. The cover 20 is injection-molded by resin, and a silver coating for design, for example, is applied to the outer surface of the cover. In addition, when the vacuum breaker 2 protrudes from the overflow edge 4a of the sink 4 of the kitchen shown in FIG. 1, only the cover 20 is directly visible. Thereby, the beauty around the kitchen can be suitably maintained.

  Further, a water supply side flow path member 22a (hereinafter also simply referred to as a flow path member 22a) and a water discharge side flow path member 22b (hereinafter also simply referred to as a flow path member 22b) are attached to the main body 21. The water supply side flow channel member 10a shown in FIG. 1 is inserted into the water supply side flow channel member 22a and is attached by an Ω-type hose band (first band) 24a. Further, the water discharge side flow path member 22b is inserted with the water discharge side flow path pipe 10b and attached by an Ω-type hose band (second band) 24b.

  The main body 21 includes a circular plate-shaped clamping portion 21d. The main body 21 is fixed by sandwiching the overflow edge 4a of the sink 4 shown in FIG.

  FIG. 4 is a perspective view showing an assembly example of the vacuum breaker 2. First, the first water supply side flow path member 22a is inserted through the packing 32 and the water discharge side flow path member 22b is inserted through the packing 33 on the lower side of the main body 21 shown in FIG.

  Next, the water supply side flow path member 22 a and the water discharge side flow path member 22 b inserted into the main body 21 are fixed by the locking metal fitting 34. For example, the locking metal fitting 34 has circular openings 34a and 34b and engaging portions 34c and 34d. One end of the water supply side flow path member 22a is inserted into the circular opening 34a. At this time, the inserted water supply side flow path member 22a is prevented from being detached from the locking metal fitting 34 by a stopper 220a provided on the flow path member 22a. Further, one end of the water discharge side flow path member 22b is inserted into the circular opening 34b. At this time, the inserted water discharge side flow path member 22b is prevented from coming off by the locking metal fitting 34 by the stopper 220b provided on the flow path member 22b. Next, the screw 35 a is engaged with the engaging portion 34 c of the locking metal fitting 34, the screw 35 b is engaged with the engaging portion 34 d, and the screws 35 a and 35 b are screwed into the main body 21. 34 is attached to the main body 21. In this way, the water supply side flow path member 22 a and the water discharge side flow path member 22 b are attached to the main body 21.

  Subsequently, a second water supply side flow path member 22c (hereinafter also simply referred to as a flow path member 22c) is inserted into the upper portion of the main body 21 with the packing 30 interposed. Next, the water supply side flow path member 22 c inserted into the main body 21 is fixed by the locking metal fitting 29. For example, the locking metal fitting 29 has a circular opening 29a and engaging portions 29b and 29c. One end of the water supply side flow path member 22c is inserted into the circular opening 29a. At this time, the inserted water supply side flow path member 22c is prevented from being detached from the locking metal fitting 29 by a stopper 220c provided on the flow path member 22c. Next, the screw 28 a is engaged with the engaging portion 29 b of the locking metal fitting 29, the screw 28 b is engaged with the engaging portion 29 c, and the screws 28 a and 28 b are screwed into the main body 21 to lock the locking metal fitting. 29 is attached to the main body 21.

  Subsequently, a disk-shaped rubber packing 27 is attached to the upper part of the floater 26. For example, the floater 26 functions as an example of a valve body, and includes a rod 26b, which is an example of a rod-like portion, on an upper portion of a float body 26a (an example of a valve body body). The rod 26b is provided with a retaining portion 26c, and a rubber packing 27 is attached between the retaining portion 26c and the float body 26a. In this case, the opening part 27a of the rubber packing 27 is enlarged and deformed, and attached through the retaining part 26c.

  Next, the floater 26 to which the rubber packing 27 is attached is attached to the upper end of the water supply side flow path member 22c. In this example, the floater 26 has a cylindrical shape in which the upper part of the float body 26a is closed. The inner diameter of the float body 26a is set larger than the outer diameter of the water supply side flow path member 22c. Thereby, the floater 26 moves up and down in principle by the water pressure of the tap water flowing out from the water supply side flow path member 22 c and the dead weight of the floater 26.

  Next, a V case (an example of an accommodation case) 25 is attached to the main body 21 with the packing 31 interposed, and the floater 26 is accommodated by the V case 25. For example, the screw 36 is inserted into the hole 25 b of the V case 25 and the screw 36 is screwed into the screw hole 21 c of the main body 21. Although not shown, the V case 25 is provided with a hole at a position facing the hole 25b and is engaged with the main body 21 in the same manner as the hole 25b. Finally, the cover 20 is attached to the V case 25 attached to the main body 21, and the V case 25 is covered with the cover 20. In this way, the vacuum breaker 2 is assembled. The nut member 23 is used when the main body 21 of the vacuum breaker 2 is attached to the sink 4 shown in FIG.

  The V case 25 and the main body 21 may be fixed by inserting a pin 136 (not shown) from the pin hole 136a of the V case 25 into the pin hole 136b of the main body 21.

  FIG. 5 is a side view showing an example of attachment of the vacuum breaker 2. The vacuum breaker 2 shown in FIG. 5 is attached to the overflow edge 4a of the sink 4 indicated by a two-dot chain line.

  In this example, the overflow edge (top plate) 4 a is provided with a mounting hole 4 b that is larger than the diameter of the locking metal fitting 34 and smaller than the diameter of the clamping portion 21 d of the main body 21. The main body 21 is inserted into the mounting hole 4b of the overflow edge 4a in a state where the nut member 23 is removed from the main body 21. After the insertion, the nut member 23 is screwed into the thread of the main body 21 from the lower surface side of the overflow edge 4a, and the overflow edge 4a is clamped by the nut member 23 and the clamping portion 21d of the main body 21. Thereby, the main body 21 can be fixed to the overflow edge 4a.

  6A is a front view showing a configuration example of the vacuum breaker 2, and FIG. 6B is a bottom view of the vacuum breaker 2 shown in FIG. 6A as seen from the bottom side. As shown in FIG. 6B, the water supply side flow path member 22 a and the water discharge side flow path member 22 b are fixed to the main body 21 by a locking metal fitting 34.

  7A is a top view of the vacuum breaker 2 shown in FIG. 6A as viewed from the upper surface side, and FIG. 7B is a cross-sectional view taken along the arrow X1-X1 showing a configuration example of the vacuum breaker 2 shown in FIG. 7A. The vacuum breaker 2 shown in FIG. 7B has a water supply system 50A and a water discharge system 50B. The water supply system 50A includes a water supply side flow channel pipe 10a, a first water supply side flow channel member 22a, a water supply side main body internal flow channel 21a, and a second water supply side flow channel member 22c, and tap water from the upstream side. To the top position.

  The first water supply side flow path member 22a is coupled to one end of a water supply side main body internal flow path 21a (hereinafter also simply referred to as a main body internal flow path 21a) provided in the main body 21. The other end of the water supply side main body internal flow path 21a is formed in a step difference. That is, the water supply side main body internal flow path 21 a is formed to extend linearly from the lower left side toward the paper surface of the main body 21, and the other end moves from the left side of the main body 21 to the central portion at a substantially central portion. Is formed. The other end of the main body internal flow path 21a is coupled to the rear end portion of the second water supply side flow path member 22c. A floater 26 is attached to the tip of the water supply side flow path member 22c. Thus, the floater 26 can be disposed at the center of the vacuum breaker 2 by forming the water supply side main body internal flow passage 21a in a stepped manner. Therefore, the vacuum breaker 2 can be reduced in size.

  Moreover, the water discharge system 50B is comprised from the water discharge side main body internal flow path 21b, the water discharge side flow path member 22b, and the water discharge side flow path pipe 10b, and the tap water guide | induced to the uppermost position is sent to the downstream garbage processing apparatus 1. Lead. One end of a water discharge side main body internal flow path 21b (hereinafter also simply referred to as a main body internal flow path 21b) is electrically connected to the water supply side flow path member 22c of the water supply system 50A. In this example, the tap water flowing out from the water supply side flow path member 22c is guided by the floater 26 and the V case 25 and flows into the water discharge side main body internal flow path 21b. A water discharge side flow path member 22b is coupled to the other end of the water discharge side main body internal flow path 21b. Tap water is supplied to the garbage disposal apparatus 1 through the water discharge side flow pipe 10b connected to the water discharge side flow path member 22b. Thus, the water supply side flow path members 22 a and 22 c and the water discharge side flow path member 22 b have a separate body from the main body 21.

  In this example, the rod 26b of the floater 26 attached to the tip of the water supply side flow path member 22c of the water supply system 50A is inserted into the guide hole (guide part) 25c of the V case 25 and is slidably guided. . The floater 26 is guided (guided) by the guide hole 25c to maintain the posture of the float body 26a when the floater 26 moves up and down due to water pressure.

  On the outer peripheral surface (side surface) of the float main body 26a of the floater 26, a protruding rib 26d (see FIG. 4) is projected. The rib 26d functions as an example of a guide portion, and slidably contacts the inner wall of the V case 25 to maintain the posture of the float body 26a. Thus, the floater 26 maintains the attitude of the float body 26a accommodated in the V case 25 by the rod 26a and the rib 26d.

  The floater 26 opens and closes a case air inlet 25a provided at the top of the V case 25 by a rubber packing 27 attached between the float body 26a and the retaining portion 26c. For example, the floater 26 is pushed up by the pressure of tap water flowing in the water supply side flow path member 22 c and closes the case air intake 25 a with the rubber packing 27. Thereby, the tap water flows from the water supply system 50A to the water discharge system 50B, and at that time, the tap water is prevented from leaking from the case air intake 25a.

  Further, when water breakage or the like occurs and negative pressure is generated in the water supply system 50A due to the reverse siphon action, the sewage in the garbage treatment apparatus 1 shown in FIG. 22b, the water discharge-side main body internal flow path 21b, the water supply-side flow path member 22c, the water supply-side main body internal flow path 21a, and the like are going to flow backward to the water pipe 6 (see FIG. 1). At this time, the floater 26 descends due to its own weight in addition to the negative pressure acting, and opens the case air intake 25a to take in air from the air intake 25a and instantly destroy the negative pressure. . Thereby, the sewage in the garbage processing apparatus 1 can be prevented from flowing back from the water discharge system 50B to the water supply system 50A.

  Next, the structural advantage of the vacuum breaker 2 will be described. 8A and 8B are cross-sectional views showing comparative structural examples of the vacuum breaker 2 according to the present invention and the vacuum breaker 2 'according to the conventional example. FIG. 8A is a cross-sectional view taken along the line XX showing a configuration example of the vacuum breaker 2 of FIG. 6A. FIG. 8B is a cross-sectional view illustrating a configuration example of a conventional vacuum breaker 2 ′.

  A conventional vacuum breaker 2 'shown in FIG. 8B includes a main body 21', a V case 25 ', and a cover 20'. The vacuum breaker 2 'has a V case 25' attached to the upper portion of the main body 21 'and a cover 20'.

  The main body 21 ′ includes a first water supply side main body internal flow path 21 a ′, a second water supply side main body internal flow path 22 c ′, and a water discharge side main body internal flow path 21 b ′. These main body internal channels 21a ', 22c', 21b 'are required to have a minimum inner diameter of 7 mm. This is because the vacuum breaker 2 'needs to allow at least 8 liters of water to flow per minute.

  By the way, the main body 21 ′ according to the conventional example is integrally molded by resin injection molding, for example. The main body internal channels 21a ', 22c', 21b 'of the main body 21' are formed by inserting a rod-shaped mold. At this time, a draft (for example, about 1 °) for drawing the rod-shaped mold is required. Therefore, it is necessary to form the minimum inner diameter point P1 on one end side of the main body internal flow path 21a 'to be 7 mm or more. At this time, the maximum inner diameter point P2 on the other end side of the main body internal flow path 21a 'having a draft of about 1 ° from the minimum inner diameter point P1 is formed to be about 12 mm. Similarly, the main body internal channels 22c 'and 21b' are formed in consideration of the draft angle.

  On the other hand, in the vacuum breaker 2 according to the present invention, the main body 21 'of the conventional vacuum breaker 2' has a plurality of parts (main body 21, water supply side flow path members 22a and 22c, water discharge side flow path member 22b). It is composed of Thereby, when the minimum inner diameter point Q1 on one end side of the flow path member 22a is formed to 7 mm, the maximum inner diameter point Q2 on the other end side of the flow path member 22a set with a draft of about 1 ° from the minimum inner diameter point Q1. Is formed to about 8 mm.

  Therefore, the maximum inner diameter point Q2 (8 mm) on the other end side of the flow path member 22a according to the present invention is compared with the maximum inner diameter point P2 (12 mm) on the other end side of the main body internal flow path 21a ′ according to the conventional example. The inner diameter can be reduced by 4 mm. Similarly, the flow path member 22c can be formed smaller than the main body internal flow path 22c '. Further, the flow path member 22b can be formed smaller than the main body internal flow path 21b '.

  Thereby, the outer diameter L1 of the vacuum breaker 2 can be formed smaller by the difference α1 than the outer diameter L2 of the vacuum breaker 2 '. Therefore, the vacuum breaker 2 can be reduced in size. Thereby, the beauty around the sink of the kitchen can be suitably maintained.

  Thus, according to the vacuum breaker 2 which concerns on this invention, the 1st water supply side flow path member 22a couple | bonded with the end of the water supply side main body internal flow path 21a, and the other end of this water supply side main body internal flow path 21a The second water supply side flow path member 22c coupled to the water discharge side main body and the water discharge side flow path member 22b coupled to the other end of the water discharge side main body internal flow path 21b.

  Therefore, the water supply side flow path members 22a and 22c of the water supply system 50A and the water discharge side flow path member 22b of the water discharge system 50B can be separate from the main body 21. Thereby, since the component parts can be subdivided, it is possible to minimize the increase in the size of the part shape by maintaining the draft of the part in the molding process. Therefore, the size of the main body 21 can be reduced, and the aesthetic appearance of the installation location can be suitably maintained. In addition, since the subdivided parts can be manufactured as common parts, the manufacturing cost can be reduced. For example, in the present embodiment, the water discharge side flow path member 22b and the second water supply side flow path member 22c are used in a state where the same shape members are turned upside down.

  Moreover, since the size of the main body 21 can be reduced, the diameters of the water supply side main body internal flow path 21a and the water discharge side main body internal flow path 21b are shortened and the diameters of both flow paths can be maximized. Thus, the flow path can be thickened while maintaining the draft angle. Moreover, the size reduction of the main body 21 of the vacuum breaker 2 that could not be realized without a cutting process can be realized only with a molded part that does not require the cutting process.

  Next, the function of preventing water from entering from the case air inlet 25a of the V case 25 will be described. FIG. 9 is an enlarged cross-sectional view of the upper portion of the vacuum breaker 2 shown in FIG. 8A. The cover 20 shown in FIG. 9 includes a rib 20e for enclosing air. The rib 20 e is provided in a cylindrical shape on the inner upper surface of the cover 20. The rib 20e encloses air and forms an air layer R therein.

  The bottom surface P3 of the air layer R formed by the rib 20e and the top surface P4 of the case air intake port 25a of the V case 25 are offset. Thereby, the upper surface P4 of the case air intake 25a can be secured by the air layer R, and water can be prevented from entering from the case air intake 25a.

  For example, when water stored in a container such as a washing bowl in the kitchen is accidentally covered with water and the covered water is applied to the vacuum breaker 2, this water may enter the inside of the cover 20 from the cover air intake 20A. Conceivable. At this time, the infiltrated water accumulates between the cover 20 and the V case 25. In this case, even if the infiltrated water reaches the lower end of the rib 20e, an air layer R having a bottom surface P3 is formed inside the rib 20e, and the water penetrates into the air layer R. There is nothing. In addition, since the upper surface P4 of the case air intake 25a is located inside the air layer R, the air layer R can prevent water from entering the V case 25 from the case air intake 25a. As a result, dust or the like contained in the infiltrated water does not enter the V case 25, so that the malfunction of the floater 26 due to the dust can be avoided.

  The rib 20e also has a function of physically preventing dust or dirt entering the V case 25 through the cover air intake 20A and the case air intake 25a as a barrier. It is also conceivable that the water discharge port 20f shown in FIG. 17 has a wide opening area and water that has entered through the cover air intake port 20A is efficiently discharged.

  Subsequently, an operation example of the vacuum breaker 2 will be described. 10A and 10B are cross-sectional views showing an operation example of the vacuum breaker 2. In the vacuum breaker 2 shown in FIG. 10A, tap water flows in the direction of the two-dot chain line (from the water supply system 50A to the water discharge system 50B). That is, when the electromagnetic valve 5 shown in FIG. 1 is opened, tap water flows through the flow channel 10a, the flow channel member 22a, the main body internal flow channel 21a, and the flow channel member 22c of the water supply system 50A to push up the floater 26. .

  At this time, the floater 26 ascends while maintaining the posture in the vertical direction by the rod 26b inserted into the guide hole 25c of the V case 25 and the rib 26d abutting against the inner wall of the V case 25. After the ascent, the floater 26 closes the case air intake 25a of the V case 25 with the rubber packing 27 attached to the upper part. Thereby, the inside of V case 25 will be in a watertight state. After shifting to the watertight state, the tap water flows from the V case 25 to the garbage disposal apparatus 1 through the main body internal flow path 21b, the flow path member 22b, and the flow path pipe 10b of the water discharge system 50B. Even if the water flow from the flow path member 22c is weak, the rise of the floater 26 stops midway, and the case air intake 25a is not blocked, the tap water flowing out of the flow path member 22c is not included in the floater 26. Flows through the inner wall of the main body and into the main body internal flow path 21b.

  In the vacuum breaker 2 shown in FIG. 10B, water breakage or the like occurs, and negative pressure is generated in the water supply system 50A due to the reverse siphon action. At this time, the raised floater 26 is lowered by its own weight in addition to the negative pressure acting on the flow path member 22c, and the case air intake 25a is opened to take in air from the air intake 25a and instantaneously. The negative pressure is destroyed. In this example, the air taken into the V case 25 from the air intake port 25a flows into the flow path member 22c, the main body internal flow path 21a, and the flow path member 22a. Thereby, it is possible to prevent sewage from flowing backward from the garbage disposal device 1 when negative pressure is generated.

  FIG. 11 is a cross-sectional view showing an example of attachment of the water supply side channel pipe 10a and the water discharge side channel pipe 10b. The flow channel pipe 10a shown in FIG. 11 is attached to the flow channel member 22a by a hose band 24a. The channel pipe 10b is attached to the channel member 22b by a hose band 24b.

  In this example, the flow path member 22 a and the flow path member 22 b are set to have different lengths and protrude from the main body 21. That is, the flow path member 22b protrudes longer than the flow path member 22a by a distance α2. The channel pipe 10b is inserted into the protruding portion of the channel member 22b and is fixed by the hose band 24b.

  Thereby, the hose bands 24a and 24b are displaced by displacing the mounting position of the hose band 24a of the flow channel pipe 10a and the mounting position of the hose band 24b of the flow channel pipe 10b along the extending direction of both flow channel pipes. It can be set alternately so as not to be adjacent. Therefore, since the hose band 24a and the hose band 24b do not overlap, the gap between the flow path member 22a and the flow path member 22b can be set narrow, and the flow path pipe 10a and the flow path pipe 10b can be attached in close proximity. it can.

  Thus, it is important to attach the flow channel pipe 10a and the flow channel pipe 10b close to each other particularly in relation to the diameter of the mounting hole 4b of the sink 4 shown in FIG. For example, the diameter of the mounting hole 4b is often set as small as possible in consideration of the scenery of the kitchen, based on the outer diameter of the flow channel pipes 10a and 10b. For example, when the outer diameters of the flow path pipes 10a and 10b are both 18 mm, the diameter of the mounting hole 4b is set to 38 mm to 39 mm. When the diameter of the mounting hole 4b is set to 38 mm, the outer diameters of the flow path pipes 10a and 10b are both 18 mm, so the thickness of the hose bands 24a and 24b needs to be suppressed to 2 mm or less. At this time, if the hose band 24a and the hose band 24b overlap, it becomes difficult to keep the thickness within 2 mm. Therefore, as described above, it is extremely important to set the hose bands 24a and 24b alternately.

  Next, the relationship between the V case 25 and the floater 26 will be described in detail. 12A to 12C are explanatory diagrams illustrating a configuration example of the V case 25. The V case 25 shown in FIG. 12A is a front view. The V case 25 shown in FIG. 12B is a top view of the V case 25 of FIG. 12A as viewed from the direction of the arrow X2. The V case 25 shown in FIG. 12C is a bottom view of the V case 25 of FIG. 12A as viewed from the arrow direction X3.

  A case air inlet 25a having a diameter of about one third of the outer diameter of the V case 25 is provided at the center of the top of the V case 25 shown in FIGS. 12B and 12C. A guide hole 25c is provided at the center of the case air inlet 25a.

  13A and 13B are explanatory views showing an example of mounting the floater 26. FIG. A float main body 26a shown in FIG. 13A has a cylindrical shape with an upper portion 26e closed. The rod 26b is provided substantially vertically at the center of the upper portion 26e. Four ribs 26d are provided at equal intervals on the outer peripheral surface of the float body 26a. The floater 26 is mounted by inserting a rod 26 b into the guide hole 25 c of the V case 25. FIG. 13B is a top view of the V case 25 to which the floater 26 is mounted as viewed from above.

  14A and 14B are sectional views showing an operation example of the floaters 26 'and 26 at the lowest point. A floater 26 ′ shown in FIG. 14A is a floater according to a conventional example, and is located at the lowest point. The float 26 'is not provided with a rib 26d. The floater 26 ′ shown in FIG. 14A is in a state of maximum swinging to the left side as viewed in the drawing. In this state, the floater 26 ′ is guided by the guide hole 25 c of the V case 25 with the rod 26 b coming into contact with two places. The maximum swing width of the floater 26 'at this time is defined as θ1.

  14B is a floater according to the present invention, and is located at the lowest point. The floater 26 is provided with a rib 26d. The floater 26 shown in FIG. 14B is in a state of maximum swinging to the left side as viewed in the drawing. In this state, the floater 26 is guided by the guide hole 25 c of the V case 25 with the rod 26 b in contact with one place and the rib 26 d with the inner wall of the V case 25. The maximum swing width of the floater 26 at this time is θ2.

  In this case, the relationship between the maximum deflection width θ1 and the maximum deflection width θ2 is θ1> θ2. That is, the swing width of the floater 26 is smaller than that of the floater 26 '. This is because the floater 26 has the rib 26d, and this rib 26d abuts against the inner wall surface of the V case 25 to suppress the swing width.

  In this way, the floater 26 positioned at the lowest point is guided by the rod 26 b that comes into contact with the guide hole 25 c of the V case 25 and the rib 26 d that comes in contact with the inner wall of the V case 25. Thereby, it can prevent that the rod 26b bites the guide hole 25c of the V case 25. Accordingly, the floater 26 can smoothly move up and down without the rod 26b being caught in the guide hole 25c. As a result, as shown in FIG. 10A, the rubber packing 27 of the floater 26 can reliably open and close the case air inlet 25a of the V case 25, and for example, water leakage from the case air inlet 25a can be prevented.

  Further, as shown in FIG. 13A, four ribs 26d are provided at equal intervals on the outer peripheral surface of the float body 26a, so that the floater 26 holds a space between the float body 26a and the inner wall surface of the V case 25. it can. Thereby, since air can pass through this space, the floater 26 can be lowered smoothly.

  If the size of the float main body 26a is large enough to contact the inner wall surface of the V case 25 without providing the ribs 26d, the posture of the floater 26 is maintained in the vertical direction. However, when the floater 26 is lowered, there is almost no way for air to escape between the floater 26 and the V case 25, so that there is a problem that the floater 26 cannot be smoothly lowered. Further, since there is almost no gap between the floater 26 and the V case 25, there is a problem that the above-described negative pressure breakdown cannot be performed quickly.

  15A and 15B are enlarged cross-sectional views showing an operation example of the floaters 26 ′ and 26 at the lowest point. 15A is an enlarged view of the inside of the one-dot chain line circle shown in FIG. 14A, and FIG. 15B is an enlarged view of the inside of the one-dot chain line circle shown in FIG. 14B.

  The floater 26 ′ shown in FIG. 15A is guided in a state where the rod 26 b is in contact with the guide hole 25 c at two points of contact points T 1 and T 2 (a state where it is caught). On the other hand, in the floater 26 shown in FIG. 15B, the rod 26b contacts the guide hole 25c at the contact T3, and the rib 26d contacts the inner wall of the V case 25 at the contact T4. At this time, in the floater 26, the rod 26b is not in contact with the guide hole 25c at the contact point T2 shown in FIG. 15A.

  In this way, the floater 26 is guided by the rod 26b that contacts the guide hole 25c at the contact T3 and the rib 26d that contacts the inner wall of the V case 25 at the contact T4. As a result, the float 26 can prevent the rod 26b from biting the guide hole 25c of the V case 25 because the rod 26b is not in contact with the guide hole 25c at the contact T2 shown in FIG. 15A. Accordingly, the floater 26 can smoothly move up and down without the rod 26b being caught in the guide hole 25c.

  The floater 26 has a guide length that connects the contact T3 and the contact T4, and the floater 26 'has a guide length that connects the contact T1 and the contact T2. Therefore, the guide length of the floater 26 is longer than the guide length of the floater 26 '. Thereby, the floater 26 can increase the clearance of the guide function and can improve the productivity.

  16A and 16B are cross-sectional views showing an operation example of the floaters 26 'and 26 at the uppermost point. A floater 26 ′ shown in FIG. 16A is a floater according to a conventional example, and is located at the uppermost point. The float 26 'is not provided with a rib 26d. The floater 26 ′ shown in FIG. 16A is in a state of maximum swinging to the left side as viewed in the drawing. In this state, the floater 26 ′ is guided by the rod 26 b coming into contact with the guide hole 25 c of the V case 25 at the contact points T 5 and T 6. The maximum swing width of the floater 26 'at this time is defined as θ3.

  A floater 26 shown in FIG. 16B is a floater according to the present invention, and is located at the highest point. The floater 26 is provided with a rib 26d. The floater 26 shown in FIG. 16B is in a state of maximum swinging to the left side as viewed in the drawing. In this state, the floater 26 is guided in the guide hole 25c of the V case 25 with the rod 26b coming into contact with the contact T7 and the rib 26d coming into contact with the inner wall of the V case 25 through the contact T8. At this time, the maximum deflection width of the floater 26 is θ4.

  In this case, the relationship between the maximum deflection width θ3 and the maximum deflection width θ4 is θ3> θ4. That is, the swing width of the floater 26 is smaller than that of the floater 26 '. This is because the floater 26 has the rib 26d, and this rib 26d abuts against the inner wall surface of the V case 25 to suppress the swing width.

  As described above, the floater 26 positioned at the uppermost point is guided by the rod 26b that contacts the guide hole 25c of the V case 25 at the contact T7 and the rib 26d that contacts the inner wall of the V case 25 at the contact T8. . As a result, the rod 26b positioned at the uppermost point contacts the guide hole 25c only at the contact T7, so that it can be prevented from biting the guide hole 25c of the V case 25. Therefore, even when the floater 26 is located at the uppermost point, the rod 26b can move up and down smoothly without being caught by the guide hole 25c.

  Thus, according to the vacuum breaker 2 according to the present invention, the floater 26 that moves up and down by water pressure slides on the rod 26b slidably engaged with the guide hole 25c of the V case 25 and the inner wall of the V case 25. It has a protruding rib 26d that abuts freely.

  Therefore, the posture of the float body 26a can be maintained by the rod 26b and the rib 26d. Thereby, the floater 26 can move up and down smoothly in the vertical direction. In addition, since the inclination of the valve body is suppressed at the two locations of the rod 26b and the rib 26d, the clearance adjustment between the floater 26 and the V case 25 can be easily performed.

  Next, the air intake function of the vacuum breaker 2 will be described. FIG. 17 is a perspective view showing a configuration example (No. 1) of the air intake portion 37 of the vacuum breaker 2. The air intake portion 37 includes a cover air intake port 20 </ b> A of the cover 20 and a case air intake port 25 a of the V case 25. The cover 20 takes in external air from the air holes 20a to 20d of the cover air intake 20A. The V case 25 takes in the air that has passed through the cover air intake 20A from the case air intake 25a. The cover 20 has a water discharge port 20f at the lower end for discharging water that has entered from the cover air intake port 20A.

  FIG. 18 is an explanatory diagram showing a configuration example (No. 2) of the air intake unit 37 of the vacuum breaker 2. The cover 20 shown in FIG. 18 is a front view, and the V case 25 is a top view.

  In this example, the area of the case air intake 25a of the V case 25 needs to be optimally set in the negative pressure breaking performance of the vacuum breaker 2. In this negative pressure breaking performance, when the height from the overflow edge 4a shown in FIG. 10B to the opening of the water supply side flow path member 22c is set to the height H, the water level rises during the negative pressure breaking test. It is necessary to satisfy the condition of 1/2 or less of H, that is, the height of 1 / 2H or less shown in FIG. 10B. In order to satisfy the condition for increasing the water level, the area of the case air intake 25a needs to be set large.

  However, considering the watertight function of the floater 26 (see FIG. 13A) and the dust and dirt entering from the intake 25a, it is not necessary to simply set the intake 25a large.

For example, FIG. 19 is a line graph showing an example of the relationship between the area of the case air intake 25a and the water level rise. In the graph shown in FIG. 19, the value (mm ² ) of the area of the intake port 25a is set on the horizontal axis, and the value of the water level rise is set on the vertical axis.

This graph, for example the cover 20 in a disconnected from the vacuum breaker 2, change at a predetermined interval the area of the case the air intake port 25a, for example, from 60 mm ² to greater than 200 mm ^2, the water level rises in the negative pressure fracture test It is the graph which showed the result of.

According to this graph, when the area of the case air intake 25a is smaller than 100 mm ² , the water level rises rapidly. Thereby, it is understood that it is desirable to set at least the area of the case air intake 25a to 100 mm ² or more.

  Further, the area of the cover air inlet 20A of the cover 20 shown in FIG. 18, that is, the total area of the air holes 20 a to 20 d needs to be optimally set in the negative pressure breaking performance of the vacuum breaker 2. In this negative pressure fracture performance, it is necessary for the water level rise during the negative pressure fracture test to satisfy the condition of height 1 / 2H or less shown in FIG. 10B. In order to satisfy the condition for increasing the water level, the area of the cover air intake 20A needs to be set large.

  However, in consideration of the beauty of the cover 20 and the dust and dirt entering from the intake 20A, it is not necessary to simply set the intake 20A large.

  For example, FIG. 20 is a line graph showing an example of the relationship between the ratio of the area of the cover air intake 2A to the area of the case air intake 25a and the water level rise. In the graph shown in FIG. 20, the horizontal axis indicates the ratio (times), and the vertical axis indicates the water level rise value. In the graph shown in FIG. 20, two different areas V1 and V2 (V1 <V2) of the case air intake port 25a of the V case 25 are shown.

  This graph shows that the ratio of the area of the cover air intake 2A to the areas V1 and V2 of the case air intake 25a with the cover 20 attached to the V case 25 is, for example, about 0.5 to 3 times predetermined. It is the graph which changed the space | interval and showed the result of the water level rise at the time of a negative pressure fracture test.

  According to this graph, when the ratio of the area of the cover air intake 2A to the areas V1 and V2 of the case air intake 25a is smaller than 1 (same size), the water level rises rapidly. Accordingly, it can be seen that it is desirable to set the ratio of the area of the cover air intake 2A to the areas V1 and V2 of the case air intake 25a to 1 or more. Further, when the ratio of the area of the cover air intake 2A to the areas V1 and V2 of the case air intake 25a is about double, the rise in the water level is suppressed until the influence of the cover air intake 2A can be ignored. In this way, the allowable water level rise value can be determined at the layout stage, and the optimum setting of the air intake area with respect to this water level rise value can be performed. Accordingly, it is possible to omit processes such as retrial and retest of the cover air intake 2A accompanying the design change of the case air intake 25a.

  Further, the area V1 and the area V2 (V1 <V2) having different areas of the case air intake port 25a draw similar curves. That is, regardless of the size of the area of the case air intake 25a, when the above-mentioned ratio becomes smaller than 1 time, the water level rises rapidly. As a matter of course, from the relationship of area V1 <area V2, the increase in water level is small in area V2, which is larger than area V1.

  The present invention is suitable for application to an atmospheric pressure vacuum breaker installed in a garbage disposal apparatus.

It is the schematic which shows the structural example of the garbage processing unit 100 to which the vacuum breaker 2 which concerns on this invention is applied. 3 is a block diagram illustrating a configuration example of a control system of the garbage processing unit 100. FIG. It is a perspective view which shows the structural example of the vacuum breaker 2. FIG. It is a perspective view which shows the example of an assembly of the vacuum breaker 2. FIG. It is a side view which shows the example of attachment of the vacuum breaker 2. FIG. A and B are explanatory views showing a configuration example (part 1) of the vacuum breaker 2. FIG. A and B are explanatory views showing a configuration example (part 2) of the vacuum breaker 2. FIG. A and B are sectional views showing comparative structural examples of the vacuum breaker 2 according to the present invention and the vacuum breaker 2 'according to the conventional example. It is sectional drawing to which the upper part of the vacuum breaker 2 shown to FIG. 8A was expanded. A and B are sectional views showing an operation example of the vacuum breaker 2. It is sectional drawing which shows the example of attachment of the water supply side channel pipe 10a and the water discharge side channel pipe 10b. A to C are explanatory diagrams illustrating a configuration example of the V case 25. A and B are explanatory views showing an example of mounting the floater 26. A and B are cross-sectional views showing an operation example (No. 1) of the floaters 26 ′ and 26 at the lowest point. A and B are enlarged sectional views showing an operation example (No. 2) of the floaters 26 ′ and 26 at the lowest point. A and B are sectional views showing an operation example of the floaters 26 ′ and 26 at the uppermost point. It is a perspective view which shows the structural example (the 1) of the air intake part 37 of the vacuum breaker 2. FIG. It is explanatory drawing which shows the structural example (the 2) of the air intake part 37 of the vacuum breaker 2. FIG. It is a broken line grab which shows the example of a relationship between the area of case air intake 25a, and a water level rise. It is a broken line grab which shows the example of the relationship between the ratio of the area of the cover air intake 2A with respect to the area of the case air intake 25a, and a water level rise.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Garbage disposal apparatus, 1a ... Grinding chamber case, 1b ... Lid body, 1c ... Drive part, 2 ... Vacuum breaker, 3 ... Water faucet tube, 4 ... Sink, 4a ... overflow edge, 5 ... solenoid valve, 6 ... water pipe, 7 ... drain pipe, 8 ... control unit, 9 ... sensor for detecting lid lock, 10a ..Water supply side flow pipe, 10b ... Water discharge side flow pipe, 20 ... Cover, 20A ... Cover air intake, 20a to 20d ... Air holes, 20e ... For air enclosure Rib (air enclosing part), 21 ... main body, 21a ... water supply side main body internal flow path, 21b ... water discharge side main body internal flow path, 22a ... first water supply side flow path member, 22b ..Water discharge side flow path members 22b, 22c ... second water supply side flow path members, 24a, 24b ... hose bands (first and second) Band), 25 ... V case (storage case), 25a ... Case air intake, 25c ... Guide hole (guide part), 26 ... Floater (valve element), 26a ... Floater body (Valve body), 26b ... Rod (rod-like part), 26d ... Posture holding rib (guide part), 50A ... Water supply system, 50B ... Water discharge system, 100 ... Garbage Processing unit

Claims (2)

An atmospheric pressure vacuum breaker installed in the water supply device,
A water supply system for leading water from the upstream side to the uppermost position;
A water discharge system for guiding water guided to the uppermost position by the water supply system to the downstream side,
The water supply system is
A water supply side body internal flow path provided inside the body,
A first water supply side flow path member coupled to one end of the water supply side main body internal flow path;
A second water supply side flow path member coupled to the other end of the water supply side main body internal flow path,
The water discharge system is
One end is connected to the second water supply side flow path member, the water discharge side main body internal flow path provided inside the main body,
A vacuum breaker comprising: a water discharge side flow path member coupled to the other end of the water discharge side main body internal flow path. A water supply side channel pipe attached to the first water supply side channel member by a first band;
A water discharge side flow channel pipe attached to the water discharge side flow channel member by a second band;
The first water supply side flow path member and the water discharge side flow path member are set to different lengths and protrude from the main body,
The vacuum breaker according to claim 1, wherein the attachment position of the first band of the water supply side flow pipe and the attachment position of the second band of the water discharge side flow pipe are displaced.

Images