JP4440604B2 - Accumulator support structure and liquid supply device - Google Patents

Description

  The present invention relates to an accumulator support structure and a liquid supply apparatus including the accumulator.

  As a water supply device, there is known a water supply device in which an accumulator is provided so as to communicate with the downstream side of the discharge port of the pump unit (so as to communicate with the vicinity of the secondary side of the pump unit or the discharge side piping). The necessity of the accumulator in the water supply device includes the following.

  That is, in the water supply device, it is desired that water is continuously supplied to the end when the faucet is opened (water is supplied so as not to be intermittent). However, in a water supply apparatus not equipped with an accumulator, if the discharge side pipe is completely filled with water and no water is used at the end (zero flow rate, pump section stopped), the end faucet is opened. The water may be intermittent. This is because immediately after opening the faucet, the water in the discharge side pipe is supplied from the end, and as a result, the pressure in the discharge side pipe rapidly decreases, so that the pump unit is activated. The water required at the end cannot be obtained. On the other hand, in the water supply apparatus provided with the accumulator, the water stored in the accumulator can be supplied without being intermittently supplied by discharging the water stored in the accumulator until the pump unit is activated.

  As such a water supply apparatus, an apparatus in which an accumulator is incorporated in a pump unit is known. Moreover, what fixed the accumulator as follows is known as a water supply apparatus. Prepare an accumulator with a male thread in the water circulation section. A communication pipe having a fixing seat provided with a female screw is prepared. A mounting seat that projects horizontally in the housing of the water supply apparatus is provided. Attach the communication pipe to the mounting seat. The communication pipe and the discharge side pipe are communicated with each other through the flexible joint. Screw the external thread of the accumulator into the internal thread of the communication pipe. Thereby, while being able to fix an accumulator to the seat for fixation, an accumulator and discharge side piping can be connected.

  Furthermore, as a water supply apparatus, what fixed the accumulator as follows is known. Prepare an accumulator with a male thread in the water circulation section. A branch pipe having a fixing member having an internal thread at one end is prepared. The male screw of the accumulator is screwed into the female screw provided at one end of the branch pipe, and the other end of the branch pipe is communicated with the discharge side pipe. Thereby, while being able to fix an accumulator to branch piping, an accumulator and discharge side piping can be connected.

  By the way, in a water supply apparatus, after installation, inspection and maintenance of a motor, a control panel, etc., or repair of a failed part may be performed. Therefore, it is preferable that the water supply apparatus is designed so as to ensure a work space for performing the above-described work after installation.

  However, since the accumulator has a relatively large volume among the components of the water supply device, in the water supply device equipped with the accumulator, a sufficient working space must be ensured in a portion where the accumulator and piping are adjacent to each other. Is difficult.

  In addition, it is desired to reduce the size of the pump unit. Therefore, the pump unit incorporating the accumulator is not preferable because the outer shape thereof becomes large.

  The present invention has been made based on such circumstances, and an object of the present invention is to provide an accumulator support structure and a liquid supply device capable of ensuring a good work space.

In order to achieve the above object, an accumulator support structure according to one aspect of the present invention includes:
An accumulator,
A mounting seat having a long hole extending in one direction and for mounting the accumulator;
A fixture that is fixed to the accumulator and that faces the mounting seat from the accumulator;
A bolt that slidably engages with the elongated hole through the fixture and is screwed into a nut;
By screwing the bolt into the nut and sandwiching the mounting seat and the fixture between the head of the bolt and the nut, the accumulator is fixed to the mounting seat,
The accumulator is slidably held with respect to the mounting seat by loosening the bolt and shifting the bolt together with the fixture to a state in which the bolt can move along the elongated hole. By screwing the bolt into the nut while being slid to a desired position of the seat, the mounting seat and the fixture are sandwiched between the head of the bolt and the nut, and the accumulator is It is characterized by being held in position.

In order to achieve the above object, a liquid supply apparatus according to one aspect of the present invention includes:
A housing having an outer wall;
A pump unit provided in the housing and having a suction port for sucking liquid and a discharge port for discharging liquid;
A motor for driving the pump unit,
A suction side pipe provided to communicate with the suction port of the pump part;
A discharge side pipe provided to communicate with the discharge port of the pump unit;
A bypass pipe provided to communicate with the discharge-side pipe on the downstream side of the discharge port of the pump unit;
Through said bypass pipe is provided so as to communicate with the discharge side pipe, with storing part of the liquid in said discharge side pipe when the pressure of liquid in the discharge side in the pipe exceeds a predetermined pressure, the an accumulator which releases the pressure of the liquid in the discharge side in the piping had been stored when a predetermined pressure or less liquid,
A mounting seat fixed to the outer wall of the housing and having a long hole extending in one direction;
A fixture that is secured to the accumulator and that faces the mounting seat from the accumulator;
A bolt that penetrates the fixture and slidably engages with the slot and is screwed into a nut;
By screwing the bolt into the nut and sandwiching the mounting seat and the fixture between the bolt head and the nut, the accumulator is fixed to the mounting seat,
The accumulator is slidably held with respect to the mounting seat by loosening the bolt and moving the bolt together with the fixture to a state in which the bolt can move along the elongated hole. By screwing the bolt into the nut while being slid to a desired position of the seat, the mounting seat and the fixture are sandwiched between the head of the bolt and the nut, and the accumulator is desired. It is characterized by being held in position.

  ADVANTAGE OF THE INVENTION According to this invention, the accumulator support structure and liquid supply apparatus which can ensure a working space favorably are obtained.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
The liquid supply apparatus is, for example, a water supply apparatus 1 that supplies water to a home, and includes a housing 2 (see FIG. 3), a pump unit 3 (see FIG. 1), and an accumulator 4 (see FIGS. 1, 3, and 4). ), A fixture 80 (see FIGS. 3 and 4), a mounting seat 5 (see FIGS. 1, 3, and 4), and the like.

  As shown in FIG. 3, as the housing 2, for example, a housing that includes a case 10 and a cover 17 and is placed vertically can be used. As shown in FIGS. 1 and 3, the case 10 includes a case main body 11, a skirt member 12, a mounting member 13, a reinforcing member 14, a mount 15, and the like.

  The case main body 11 has a bottom wall 11a extending in the left-right direction and a back wall 11b extending upward from the rear edge of the bottom wall 11a, and is formed in a substantially L shape. The skirt member 12 has a pair of side skirt walls 12a extending upward from both side edges of the bottom wall 11a so as to cover the lower ends on both sides of the case body 11, respectively, and the front edge and bottom wall 11a of the side skirt walls 12a. A substantially U-shaped front hem wall 12b provided so as to cover the front lower end portion of the case body 11 from the front end edge of the case body 11. The skirt member 12 is attached to the case body 11 by welding or the like.

  The attachment member 13 for attaching the water supply apparatus 1 to a wall (not shown) includes a vertical portion 13a, a horizontal portion 13b extending forward from an upper end edge of the vertical portion 13a, an upper end of the vertical portion 13a orthogonal to the horizontal portion 13b. And a substantially isosceles trapezoidal mounting piece 13c that rises upward from the edge. The attachment member 13 is fixed to the back wall 11b in a state where the vertical portion 13a is overlapped on the outer surface (rear surface) side of the back wall 11b. Thereby, the horizontal part 13b is provided so that it may extend ahead from the upper end edge of the back wall 11b, and the attachment piece 11c is provided so that it may protrude above the case main body 11. FIG. Further, in a state where the attachment member 13 is fixed to the back wall 11 b, the attachment piece 13 c is disposed at a substantially central portion in the left-right direction of the case 10. A substantially central portion of the attachment piece 13c is formed with a through hole 13e for allowing a fixing tool such as a screw (not shown) to pass through when the water supply device 1 is attached to the wall or the like.

  The reinforcing member 14 includes a vertical portion 14a and a horizontal portion 14b extending forward from the upper end edge of the vertical portion 14a, and is formed in a substantially inverted L shape. The reinforcing member 14 is fixed to the inner surface side of the corner portion so as to reinforce the corner portion formed by the back wall 11b and the horizontal portion 13b. The rectangular parallelepiped frame-shaped mount 15 supports the pump unit 3 and is fixed to the inner surface of the bottom wall 11a so as to rise upward from the inner surface side of the bottom wall 11a.

The cover 17 has an upper wall 18a extending in the left-right direction, a front wall 18b extending downward from a front edge of the upper wall 18a, and a pair of side walls 18c extending rearward from both side edges of the front wall 18b. The upper side, the front side, and the left and right sides of the case 10 are covered. With this structure, the housing 2 is formed in a box shape extending in the vertical direction.

  In the housing 2, for example, the pump unit 3 is provided in a state where it is supported on the gantry 15 and is located on the upper right side. The pump unit 3 has a structure in which a plurality of, for example, two vertical pumps 20 a and 20 b and a suction / discharge system 30 are combined. Specifically, the two vertical pumps 20a and 20b are arranged in parallel in the left-right direction. The vertical pumps 20a and 20b are disposed below the motor 22 in a state where the vertical motor (for example, brushless DC motor) 22 disposed on the upper side and the output shaft of the motor 22 are directly connected to each other. A pump unit (for example, a multistage turbine pump) 23 is included. The pump unit 23 is driven by the motor 22.

A cooling fan 24 is provided on the top of each motor 22. The cooling fan 24 has a bottomed cylindrical casing 24a that is assembled so as to cover the upper end portion of the motor 22, and an impeller 24b built in the casing 24a. As the impeller 24b, a motor direct-acting impeller that is directly connected to the output shaft of the motor 22 can be used.
An air suction port (not shown) is formed on the upper wall of the casing 24a facing the impeller 24b. Further, on the lower side of the casing 24a, an air outlet which opens along the outer circumferential surface of the motor 22 (not shown) is formed. Therefore, when the impeller 24b rotates, the impeller 24b sucks air in the vicinity of the ceiling in the casing 24a from the suction port, and blows it out along the outer peripheral surface of the motor 22 from the air outlet, so that the motor 22 that generates heat is cooled.

  The pump unit 23 has a suction port 25 provided in the center of the lower part for sucking water and a discharge port 26 provided so as to protrude to the front side to discharge water, and when the motor 22 rotates. In this structure, water is sucked from the suction port 25 and discharged from the discharge port 26 while increasing the pressure. A suction pipe 27 extending downward is attached to the suction port 25 of each pump portion 23. Moreover, a substantially inverted L-shaped discharge pipe 28 is attached to the discharge port 26 of each pump unit 23.

As shown in FIGS. 1 and 2, the suction / discharge system 30 includes a suction-side pipe 31 that communicates the lower end of each suction pipe 27 in the left-right direction and a discharge that communicates the lower end of each discharge pipe 28 in the left-right direction. Side piping 32 . That is, the suction port 25 of the pump unit 23 communicates with the suction side pipe 31 via the suction pipe 27. The discharge port 26 of the pump unit 23 communicates with the discharge side pipe 32 via the discharge pipe 28 .

  The suction side pipe 31 is arranged behind the discharge side pipe 32 in parallel with this. These pipes 31 and 32 are configured by pipe members whose right end extends to the vicinity of the right side wall of the housing 2 and whose left end extends to the vicinity of the central part in the left and right direction of the housing 2.

  As shown in FIG. 2, for example, a chuck valve 33 and a downward elbow 36 including a pressure detector 35 for detecting the pressure of the water main pipe 6 are connected to the left end portion of the suction side pipe 31 in this order. ing. In this case, the lower end of the elbow 36 is an inlet 36 a connected to the water main 6. Thereby, a suction-side piping system extending from the inlet 36a to the suction port 25 of the pump unit 23 is formed. The suction pipe 31 may be provided with a backflow prevention device.

  As shown in FIG. 1, the discharge side pipe 32 is located near the left end of the discharge side pipe 32 and controls a flow rate detection unit that controls the operation of the vertical pumps 20a and 20b, for example, a paddle for stopping a small amount of water. An integrated flow rate detector 44 is incorporated. In addition, a maintenance on-off valve 45, a downward elbow 46, and the like are connected to the left end of the discharge side pipe 32 in this order. In this case, the lower end portion of the elbow 46 becomes an outlet 46 a connected to the water supply pipe (pipe communicating with the faucet) 7. Thereby, a piping system on the discharge side extending from the outlet 46a to the discharge port 26 of the pump unit 23 is formed. Further, although not shown, the discharge side pipe 32 includes a pressure detector for detecting the discharge pressure from the water supply pipe 7. In addition, the discharge side pipe 32 has a bypass pipe 47 communicating with the discharge side pipe 32. That is, the bypass pipe 47 is provided so as to communicate with the downstream side of the discharge port 26 of the pump unit 23.

  In the housing 2, an accumulator 4 that accumulates and discharges energy (water pressure) is provided on the left side of the pump unit 3. The accumulator 4 includes, for example, a pressure vessel 50 having an air chamber filled with compressed gas and a liquid chamber filled with water, and a partition film (not shown) that partitions the air chamber and the liquid chamber, Can be used that are configured to store and release.

  The accumulator 4 has a circulation part 51 for introducing water into the liquid chamber and discharging the water from the liquid chamber to the outside. The circulation part 51 is provided at the lower end part of the pressure vessel 50, for example. The circulation part 51 of the accumulator 4 communicates with the discharge side pipe 32 through the flexible pipe 52 and the bypass pipe 47.

  Therefore, when the water pressure in the discharge side pipe 32 exceeds a predetermined pressure, the accumulator 4 introduces water into the liquid chamber via the flow part 51 and stores it in the liquid chamber, and the water pressure in the discharge side pipe 32 is reduced. The water stored in the liquid chamber is discharged to the discharge side pipe 32 when the pressure becomes lower than the predetermined pressure. Thus, in this water supply apparatus 1, water can be stored inside the accumulator 4.

  Although not shown, a control panel is accommodated in the housing 2. This control panel includes a control device such as a control device such as an inverter, a microcomputer, and the like. The control panel is electrically connected to various devices such as the motor 22, the pressure detector 35, the flow rate detector 44 and the like through cables, so that the two vertical pumps 20a and 20b can be operated alternately and the amount of water used. You can drive according to your needs.

  The water supply apparatus configured as described above operates as follows.

  The main water pipe 6 is connected to the elbow 36, the water supply pipe 7 is connected to the elbow 46, and the water supply apparatus 1 is turned on by operating the control panel.

  It is assumed that the control unit built in the control panel detects that the discharge pressure is lower than the target pressure by the pressure signal from the pressure detector 35 on the discharge side pipe 32 side. In this case, the control unit causes the suction pressure (pressure detected by the pressure detector 35 on the suction side pipe 31 side) and the discharge pressure (pressure detector on the discharge side pipe 32 side) so that the discharge pressure becomes the target pressure. It is necessary to control the differential pressure with respect to the pressure detected by. Therefore, the control unit causes one of the two pumps 20a and 20b, for example, the pump 20a to perform an inverter operation in accordance with preset control contents. Thereby, the water from the water main pipe 6 sucked through the chuck valve 33, the suction side pipe 31, and the suction pipe 27 is increased to a constant pressure, and the increased water is discharged to the discharge pipe 28, the discharge side. It is sent to the water supply pipe 7 through the pipe 32, the flow rate detector 44, and the on-off valve 45 and supplied to the faucet. When the amount of water used decreases, the rotational speed (capacity) of the pump 20a is reduced according to the flow rate signal of the flow rate detector 44. Moreover, when it becomes below predetermined amount of water used, the driving | operation of the pump 20a is stopped and it changes into the water supply by the accumulator 4. FIG. Therefore, water can be continuously supplied to the terminal communicating with the water supply device 1 regardless of the amount of water flowing through the discharge side pipe 32.

  Further, it is assumed that the pressure detected by the pressure detector on the discharge side pipe 32 side becomes a pressure exceeding a predetermined value during operation. In that case, a part of the water going to the water supply pipe 7 is guided to the accumulator 4 via the bypass pipe 47. Therefore, the accumulator 4 can stabilize the water pressure on the discharge side pipe 32 side. Moreover, since water can be accumulated in the accumulator 4 by this, when the water quantity by the side of the discharge side piping 32 becomes below a predetermined water quantity as mentioned above, water is supplied to the discharge side pipe 32 by the accumulator 4 can do.

  Furthermore, when the water supply by the pump operation is resumed after the operation of the pump 20a is once stopped, the alternating operation of starting the operation of the pump 20b is started, and the inverter is the same as described above. Water is supplied by driving.

Next, the accumulator support structure 100 will be described.
As shown in FIGS. 1, 3, and 4, a mounting seat 5 for mounting the accumulator 4 is fixed to a back wall 11 b that is an outer wall of the housing 2. Further, a fixture 80 is fixed to the circulation part 51 of the accumulator 4. The accumulator 4 is slidably held on the mounting seat 5 via a mounting tool 80.

  Specifically, the mounting seat 5 includes a first mounting portion 61 that extends in the vertical direction, and a first projection that projects in a horizontal direction (a direction substantially perpendicular to the first mounting portion 61) from the upper end edge of the mounting portion 61 toward the front. 1 overhanging portion 62, a vertical portion 63 extending upward from the front end edge of the overhanging portion 62 (in a direction substantially perpendicular to the first overhanging portion 62), and obliquely upward from the upper end edge of the vertical portion 63 A taper part 64 as an inclined part that inclines toward the second part, a second overhang part 65 that projects in a horizontal direction (a direction substantially parallel to the first overhang part 62) from the upper end edge of the taper part 64 to the rear, and The second mounting portion 66 extends upward (in a direction substantially parallel to the first mounting portion 61) from the rear edge of the overhanging portion 65 (see FIGS. 3 and 4). .

The first and second attachment portions 61 and 66 are formed so as to be located on substantially the same plane. The first and second attachment portions 61 and 66 have screw holes (not shown) through which screws pass. The mounting seat 5 is fixed to the housing 2 by screwing the first and second mounting portions 61 and 66 to the back wall 11b. Further, the mounting seat 5 has one or more, for example, two long holes 71 (see FIG. 1) extending in the vertical direction so as to continue from the vertical portion 63 to the tapered portion 64. These long holes 71 are provided in parallel to each other. In other words, the long hole 71 is provided along the vertical portion 63, and further provided along the inclination of the tapered portion 64 .

  The fixture 80 includes a main body portion 81 that projects obliquely downward and rearward from the flow portion 51 of the accumulator 4 toward the vertical portion 63 of the mounting seat 5, and a pair of projecting pieces that project laterally from the lower end portion of the main body portion 81. 82 is provided. The projecting piece 82 has a screw hole through which a pair of bolts, for example, butterfly bolts 83 pass. In the present embodiment, the butterfly bolt 83 (specifically, the male thread portion of the butterfly bolt 8) functions as an engaging portion that slides along the long hole 71.

  The accumulator 4 is fixed to the back wall 11b of the housing 2 as follows. First, the butterfly bolt 83 is penetrated in the order of the screw hole of the projecting piece 82, the lower end portion of the long hole 71 of the mounting seat 5, and the nut 84. The butterfly bolt 83 is screwed into the nut 84, and the projecting piece 82 and the vertical portion 63 of the mounting seat 5 are sandwiched between the head of the butterfly bolt 83 and the nut 84. As a result, the accumulator 4 is fixed to the back wall 11 b of the housing 2 via the fixture 80 and the mounting seat 5.

  At the time of maintenance, the accumulator 4 is slid upward as follows. First, the butterfly bolt 83 is loosened. The butterfly bolt 83 is moved upward along the long hole 71 together with the fixture 80. As a result, the accumulator 4 slides upward via the fixture 80.

  In the present embodiment, the long hole 71 is formed so as to continue from the vertical portion 63 to the tapered portion 64. Therefore, in a state where the butterfly bolt 83 is slid in a region corresponding to the vertical portion 63 of the long hole 71, the accumulator 4 is moved upward in the vertical direction. Thereby, a work space can be secured near the upper side of the chuck valve 33.

  Further, when the butterfly bolt 83 is slid to a region corresponding to the taper portion 64 in the long hole 71, the accumulator 4 moves upward and obliquely forward. In this way, by forming the tapered portion 64 in the mounting seat 5, the accumulator 4 can be further avoided by avoiding obstacles above the accumulator 4 such as the horizontal portion 13 b of the mounting member 13 and the horizontal portion 14 b of the reinforcing member 14. It can be moved upward. Thereby, a wider working space near the upper side of the chuck valve 33 can be secured.

When the accumulator 4 is slid to a desired position, the butterfly bolt 83 is screwed into the nut 84, and the projecting piece 82 and the mounting seat 5 are sandwiched between the head of the butterfly bolt 83 and the nut 84. Thereby, the accumulator 4 can be stopped at a desired position via the fixture 80 and the attachment seat 5.

  As described above, according to the accumulator support structure 100 and the water supply device 1 of the present embodiment, the accumulator 4, the fixture 80 fixed to the accumulator 4, and the accumulator 4 are slidably held via the fixture 80. The mounting seat 5 is provided. Therefore, by sliding the accumulator 4, the work space can be secured satisfactorily.

  The mounting seat 5 has a long hole 71 extending along one direction, and the mounting tool 80 has a butterfly bolt 83 that slides along the long hole 71. Therefore, the accumulator 4 can be slid with respect to the mounting seat 5 with a simple configuration.

Moreover, the mounting seat 5 has a tapered portion 64 that is inclined with respect to the back wall 11 b of the housing 2, and the long hole 71 is provided at least along the inclination of the tapered portion 64 . Therefore, even as an obstacle adjacent to the accumulator 4 is provided, it is possible to an accumulator 4 is slid to avoid the obstacle.

  Note that the accumulator support structure of the present invention can be widely applied to mounting various accumulators that store and release energy.

The front view which shows the water supply apparatus which concerns on one Embodiment of this invention in the state which removed the cover. The front view which shows the pump unit of the water supply apparatus of FIG. 1, and the piping system of the suction side. The side view which cuts and shows the water supply apparatus of FIG. 1 partially. Sectional drawing which shows the water supply apparatus of FIG. 1 in the state which made the accumulator slide.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Water supply apparatus, 2 ... Housing, 4 ... Accumulator, 5 ... Mounting seat, 11b ... Outer wall (back wall), 22 ... Motor, 23 ... Pump part, 25 ... Suction port, 26 ... Discharge port, 31 ... Suction side piping , 32 ... discharge side piping, 47 ... bypass pipe, 71 ... long hole, 80 ... fixture, 83 ... bolt (butterfly bolt), 84 ... nut, 100 ... accumulator support structure.

Claims (4)

An accumulator,
A mounting seat having a long hole extending in one direction and for mounting the accumulator;
A fixture that is fixed to the accumulator and that faces the mounting seat from the accumulator;
And slidably engaged with the elongated hole through the fixture, and a bolt screwed into the nut,
By screwing the bolt into the nut and sandwiching the mounting seat and the fixture between the head of the bolt and the nut, the accumulator is fixed to the mounting seat,
The accumulator is slidably held with respect to the mounting seat by loosening the bolt and shifting the bolt together with the fixture to a state in which the bolt can move along the elongated hole. By screwing the bolt into the nut while being slid to a desired position of the seat, the mounting seat and the fixture are sandwiched between the head of the bolt and the nut, and the accumulator is An accumulator support structure that is held in position . A housing having an outer wall;
A pump unit provided in the housing and having a suction port for sucking liquid and a discharge port for discharging liquid;
A motor for driving the pump unit,
A suction side pipe provided to communicate with the suction port of the pump part;
A discharge side pipe provided to communicate with the discharge port of the pump unit;
A bypass pipe provided so as to communicate with the discharge side pipe on the downstream side of the discharge port of the pump unit;
Through said bypass pipe is provided so as to communicate with the discharge side pipe, with storing part of the liquid in said discharge side pipe when the pressure of liquid in the discharge side in the pipe exceeds a predetermined pressure, the an accumulator which releases the pressure of the liquid in the discharge side in the piping had been stored when a predetermined pressure or less liquid,
A mounting seat fixed to the outer wall of the housing and having a long hole extending in one direction;
A fixture that is fixed to the accumulator and that faces the mounting seat from the accumulator;
And slidably engaged with the elongated hole through the fixture, and a bolt screwed into the nut,
By screwing the bolt into the nut and sandwiching the mounting seat and the fixture between the head of the bolt and the nut, the accumulator is fixed to the mounting seat,
The accumulator is slidably held with respect to the mounting seat by loosening the bolt and shifting the bolt together with the fixture to a state in which the bolt can move along the elongated hole. By screwing the bolt into the nut while being slid to a desired position of the seat, the mounting seat and the fixture are sandwiched between the head of the bolt and the nut, and the accumulator is A liquid supply apparatus which is held in a position . 3. The liquid supply apparatus according to claim 2, wherein the bypass pipe communicates with the accumulator through a flexible pipe . The supply seat according to claim 2, wherein the mounting seat has an inclined portion inclined with respect to the outer wall of the housing, and the elongated hole is provided so as to be continuous with the inclined portion. Liquid device.

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