JP6935668B2 - Hot water tank and local cleaning equipment - Google Patents

Description

The present invention relates to a hot water tank and a local cleaning device including the hot water tank.

Conventionally, as an example of a local cleaning device (sanitary cleaning device), a hot water storage tank for storing water, a heater for heating the water in the hot water storage tank, and a cleaning nozzle for ejecting water heated by the heater are provided. , A local cleaning device for cleaning a local part of the human body is known.

Some of these local cleaning devices include a holding member that supports the end of the heater and is screwed to the outer wall of the hot water storage tank. (For example, Patent Document 1). In this local cleaning device, the holding member is formed with an insertion hole through which the end of the heater is inserted.

Japanese Unexamined Patent Publication No. 2003-139403

By the way, in the above-mentioned local cleaning device, the heater is inserted into the insertion hole and then the holding member is screwed to the outer wall of the hot water storage tank in the axial direction of the end of the heater so that the heater can be used in the hot water storage tank. Is fixed to. Therefore, the inner diameter of the insertion hole may be larger than the outer diameter of the heater in order to facilitate the insertion of the end portion of the heater into the insertion hole. However, in this case, since a gap is formed between the heater and the insertion hole, the heater may rattle in the direction orthogonal to the axial direction of the insertion hole. That is, after the heater is attached to the hot water storage tank, the heater may rattle.

The present invention has been made in view of such circumstances. An object of the present invention is to provide a hot water tank in which the heater is less likely to rattle due to a mounting member for attaching the heater to the tank.

The hot water tank that solves the above problems includes a tank that stores liquid, a heater that is inserted into an insertion hole formed in the tank and heats the liquid stored in the tank, and a support hole formed in the tank. A water temperature sensor that measures the temperature of the liquid that is inserted into the tank and stores it in the tank, a fixed portion that is fixed to the tank, and a shaft hole through which the end of the heater that protrudes from the insertion hole is inserted. By reducing the diameter of the mounting member having the bearing portion and the hole through which the end portion of the water temperature sensor protruding from the support hole is inserted, and the shaft hole, the end portion of the heater is inserted into the bearing portion. The bearing portion is formed by bending a plate-shaped member, and the axial length of the bearing portion is larger than the thickness of the plate-shaped member. Is formed of metal and abuts on both the water temperature sensor and a thermal fuse that shuts off energization of the heater when an excessive temperature rise of the tank occurs.

According to the above configuration, the fastener can reduce the diameter of the shaft hole through which the end of the heater is inserted. Therefore, it can be fixed to the bearing portion so as to wrap the end portion of the heater. As a result, a gap is less likely to occur between the heater and the shaft hole, and the heater is less likely to move in a direction orthogonal to the axial direction of the shaft hole. In this way, it is possible to suppress rattling of the heater due to the mounting member that attaches the heater to the tank. Further, since the axial length of the bearing portion is larger than the thickness of the plate-shaped member, the contact area with the heater is increased to improve the thermal conductivity, and the attachment formed by the metal having high thermal conductivity. The heat of the heater is easily transferred to the water temperature sensor and the temperature fuse through the member, and the responsiveness of the water temperature sensor and the temperature fuse can be improved.

In the hot water tank, it is preferable that the mounting member is made of metal and the fastener has a ground wire fixed to the bearing portion.

According to the above configuration, the end portion of the heater and the ground wire can be fixed to the bearing portion by a single fastener. That is, it is not necessary to use a plurality of fasteners to fix the end of the heater and the ground wire to the mounting member. Therefore, the mounting structure of the heater including the connection of the ground wire can be simplified.

In the hot water tank, the holes are preferably formed through the side surfaces of the fixed portion.

According to the above configuration, the heat of the heater can be more appropriately transferred to the water temperature sensor and the temperature fuse via the mounting member, and the responsiveness of the water temperature sensor and the temperature fuse can be improved.

In the hot water tank, the mounting member, the fixed portion further includes a connecting portion connecting the bearing portion, the connecting portion is rigid rather low as compared with the fixed portion and the bearing portion, It is preferable that the heater and the water temperature sensor are bent and formed, and the insertion shafts of the heater and the water temperature sensor are supported in parallel by the mounting member .

According to the above configuration, since the connecting portion has lower rigidity than the fixed portion and the bearing portion, the connecting portion can be deformed. In this way, the position and posture between the fixed portion and the bearing portion can be relatively adjusted by the deformable connecting portion. Therefore, when the heater is attached to the tank, the attachment position of the heater can be adjusted. Therefore, the heater can be easily attached. Further, when the heater and the water temperature sensor are inserted into the tank, the attachment direction to the tank becomes one direction, and the attachment to the tank can be facilitated.

In the hot water tank, the bearing portion has a split ring that is partially separated in the circumferential direction so as to have two ends, and a split ring that protrudes from the two ends of the split ring toward the outside of the split ring. It is preferable that the annular clamp having the pair of projecting portions and the engaging holes for engaging with the fastener are formed in the pair of projecting portions.

According to the above configuration, the end portion of the heater is inserted through the split ring portion, and then the fastener is attached to the protruding portion via the engaging hole. Then, by narrowing the distance between the pair of protruding portions, the diameter of the split ring portion can be reduced, so that the end portion of the heater can be fixed to the bearing portion. Therefore, the heater can be easily attached.

In the hot water tank, at least one of the pair of engaging holes is preferably an elongated hole.

According to the above configuration, since at least one engaging hole is an elongated hole, it is possible to easily attach the fastener to the pair of engaging holes as compared with the case where the pair of engaging holes are not elongated. That is, the heater can be easily attached to the attachment member.

The local cleaning device that solves the above problems preferably includes the above-mentioned hot water tank and a cleaning nozzle that ejects the liquid stored in the hot water tank.

According to the above configuration, in the local cleaning device, the action and effect of the hot water tank described above can be obtained.

The perspective view of the local cleaning apparatus which concerns on one Embodiment. A perspective view of a hot water tank provided in a local cleaning device. Side view of the hot water tank. Sectional view of the hot water tank. Perspective view of the mounting member. An exploded perspective view of a configuration including a mounting member and a heater. A perspective view of a configuration including a mounting member and a heater. The side view of the mounting member which concerns on the 1st modification. The side view of the mounting member which concerns on the 2nd modification.

Hereinafter, an embodiment of a local cleaning device including a hot water tank will be described.

As shown in FIG. 1, the local cleaning device 110 includes a main body 120 having the main functions of the local cleaning device 110, a toilet seat 130 on which the user sits, a toilet lid 140 covering the toilet seat 130, and a switch. The operation unit 150 is provided. The local cleaning device 110 is used in a state of being attached to the upper surface of the toilet bowl 100.

The main body 120 is provided behind the upper part of the toilet bowl 100. The main body 120 is made of, for example, resin. Further, the main body 120 is formed in a housing. Inside the main body 120, a water supply valve 121 for switching the water supply state, a hot water tank 1 for heating the stored water, a water flow amount adjusting valve 122 for adjusting the water flow amount, and water supplied from the hot water tank 1 A cleaning nozzle 123 for injecting water and a control unit 124 for controlling the drive of a component of the local cleaning device 110 are built in.

The water supply valve 121 is opened when water is supplied to the hot water tank 1 as an example of a liquid, and is closed when the supply of water to the hot water tank 1 is stopped.

The hot water tank 1 stores the water supplied from the water supply valve 121. Then, the hot water tank 1 heats the stored water to hot water having a predetermined temperature. Further, the hot water tank 1 stores hot water while maintaining the temperature of the hot water. The water stored in the hot water tank 1 is supplied to the cleaning nozzle 123. The detailed configuration of the hot water tank 1 will be described later.

The water flow adjusting valve 122 is provided between the hot water tank 1 and the cleaning nozzle 123. The water flow amount adjusting valve 122 adjusts the water flow amount of hot water that passes through the water supply valve 121 and the hot water tank 1 and is supplied to the cleaning nozzle 123.

The cleaning nozzle 123 has two types of nozzles that can be used properly according to the intended use. Further, the cleaning nozzle 123 moves back and forth between a position where the user's local area can be cleaned and a position where the cleaning nozzle 123 fits in the main body 120. When cleaning a local part of the user with the cleaning nozzle 123, the cleaning nozzle 123 advances and hot water is ejected from the tip of the cleaning nozzle 123.

The toilet seat 130 and the toilet lid 140 are provided so as to be swingable with respect to the main body 120. The toilet seat 130 and the toilet lid 140 are made of, for example, resin.

The operation unit 150 is provided so as to extend from the side surface of the main body unit 120 to the front side. The operation unit 150 has a button and the like for starting and stopping the operation of the local cleaning device 1.

Next, the configuration of the hot water tank 1 will be described with reference to FIGS. 2 to 7.

As shown in FIGS. 2 and 3, the hot water tank 1 includes a tank 10 for storing water, a heater 20 for heating the water stored in the tank 10, and a water temperature sensor 30 for measuring the temperature of the water stored in the tank 10. A temperature fuse 31 that shuts off the energization of the heater 20 when an excessive temperature rise of the tank 10 is detected, a vacuum breaker 32 that prevents the backflow of water supplied to the outside, and a case where the water temperature rises excessively. It is provided with a water temperature detecting unit 33 for stopping the supply of water, a ground wire 91 for grounding, and a mounting structure 35 for attaching the heater 20, the water temperature sensor 30 and the ground wire 91 to the tank 10.

As shown in FIGS. 2 and 3, the tank 10 has a box shape. Further, as shown in FIG. 4, the tank 10 is formed with insertion holes 12a and 12b through which the heater 20 is inserted in the side walls 11a and 11b of the tank 10. The insertion holes 12a and 12b are formed so as to form a pair with the opposite side walls 11a and 11b of the tank 10. Further, a support hole 13 for attaching the water temperature sensor 30 is formed in the side wall 11a of the tank 10 in addition to the insertion hole 12a. The support hole 13 is formed near the insertion hole 12a.

As shown in FIG. 4, the heater 20 has a rod shape. The heater 20 is, for example, a sheathed heater that generates heat by energizing terminals provided at both ends. The heater 20 is provided so as to penetrate the tank 10 through the insertion holes 12a and 12b, and both ends of the heater 20 are exposed to the outside of the tank 10.

The water temperature sensor 30 is a sensor that measures the temperature of the liquid stored in the tank 10. The water temperature sensor 30 may be configured by, for example, a thermistor. The water temperature measured by the water temperature sensor 30 is used when controlling the drive of the heater 20.

The thermal fuse 31 is arranged in the middle of the energizing circuit of the heater 20. The thermal fuse 21 cuts off the energization of the heater 20 when the temperature of the tank 10 rises excessively. Further, the thermal fuse 31 does not recover when the operation of cutting off the energization of the heater 20 is performed. In this way, the temperature of the tank 20 does not rise excessively.

The vacuum breaker 32 is provided on the upper surface of the tank 10. The vacuum breaker 32 introduces air from the outside when the pressure in the tank 10 becomes negative. Therefore, it is possible to prevent the water supplied from the tank 10 to the cleaning nozzle 123 from flowing back into the tank 10.

The high temperature ejection prevention unit 33 is provided on the upper surface of the tank 10. The high temperature ejection prevention unit 33 is mainly composed of a temperature sensitive reed switch, and when it detects an excessive temperature rise of the water temperature, it stops the supply of hot water to the outside and stops the injection of hot water from the cleaning nozzle 123.

Next, the mounting structure 35 will be described.

As shown in FIGS. 4, 6 and 7, the mounting structure 35 includes an O-ring 81b having a sealing function on the side wall 11b side of the tank 10, a cap 82 for closing the insertion hole 12b formed in the tank 10, and a cap 82. It has. Further, the mounting structure 35 includes a mounting member 40 for supporting the heater 20 and the water temperature sensor 30, a screw 53 for fixing the mounting member 40 to the tank 10, and a sealing member 81a having a sealing function on the side wall 11a side of the tank 10. A spacer 80 for fixing the seal member 81a to the tank 10 and a fastener 90 for fixing the heater 20 and the ground wire 91 to the mounting member 40 are provided.

As shown in FIG. 4, the O-ring 81b and the cap 82 fix the end portion of the heater 20 on the side wall 11b side of the tank 10. The cap 82 is configured to press the O-ring 81b against the tank 10 when it is attached to the tank 10.

The mounting member 40 is made of metal. The mounting member 40 is preferably a relatively soft metal material, for example copper. As shown in FIG. 5, the mounting member 40 includes a fixed portion 50 fixed to the tank 10, a bearing portion 60 into which the end portion of the heater 20 protruding from the insertion hole 12a is inserted, and the fixed portion 50. It has a connecting portion 70 that connects the bearing portion 60.

The fixed portion 50 has a plate shape. The fixed portion 50 is formed in a shape along the side wall 11a of the tank 10. Further, the upper end of the fixed portion 50 is formed in a shape that follows the outer shape of the thermal fuse 31. Two holes 51 and 52 are formed in the fixed portion 50. The hole 51 is also formed through the side surface of the fixed portion 50. The hole 52 is formed in a round hole.

The bearing portion 60 includes a split ring 61 whose circumferential direction is partially separated so as to have two ends, and a pair of protrusions (first protruding portion 62 and a first protruding portion 62) protruding from the two ends of the split ring 61, respectively. An annular clamp having two protrusions 63). A shaft hole 66 through which the end of the heater 20 is inserted is formed inside the split ring 61.

The first protruding portion 62 projects radially outward from one of the two ends of the split ring 61. The second protruding portion 63 projects outward in the circumferential direction from the other of the two ends of the split ring 61. In this respect, the first protruding portion 62 and the second protruding portion 63 project outward from the two ends of the split ring 61, respectively.

The bearing portion 60 is formed by bending a plate-shaped member. Here, in the bearing portion 60 of the present embodiment, the first protruding portion 62 is bent with respect to the split ring 61, while the second protruding portion 63 is linear with respect to the split ring 61. That is, the labor required for the processing is omitted in that the processing for bending both the first protruding portion 62 and the second protruding portion 63 does not have to be performed.

A pair of engaging holes (first engaging hole 64 and second engaging hole 65) are formed in the first protruding portion 62 and the second protruding portion 63. Unlike the first engaging hole 64, the second engaging hole 65 is formed with a screw hole.

The connecting portion 70 projects from the fixed portion 50 to the side opposite to the side attached to the tank 10, and is connected to the split ring 61 of the bearing portion 60. The connecting portion 70 is formed in a plate shape in which the fixed portion 50 side is bent. Further, the connecting portion 70 is configured to be smaller than the fixed portion 50 and the bearing portion 60, and has a lower rigidity than the fixed portion 50 and the bearing portion 60. Therefore, the relative positional relationship and posture of the fixed portion 50 and the bearing portion 60 can be adjusted by deforming the connecting portion 70 by applying a bending load and a moment to the connecting portion 70.

Next, how to attach the heater 20 to the tank 10 will be described.

First, as shown in FIGS. 6 and 7, the end portion of the heater 20 is inserted in the order of the O-ring 81, the spacer 80, and the split ring 61 (shaft hole 66) of the mounting member 40. Then, by tightening the fastener 90 through the first engaging hole 64 and the second engaging hole 65, the distance between the first protruding portion 62 and the second protruding portion 63 is narrowed, and the split ring of the bearing portion 60 is formed. The diameter of 61 (shaft hole 66) is reduced. In this respect, in the present embodiment, it can be said that the shaft hole 66 of the bearing portion 60 is reduced in diameter by the fastener 90. In this way, the end portion of the heater 20 is fixed to the mounting member 40. Further, the water temperature sensor 30 is inserted into the hole 51 of the mounting member 40, and the water temperature sensor 30 is fixed to the mounting member 40.

When tightening the fastener 90, the ground wire 91 is also tightened with the fastener. In this way, the fastener 90 can fix the end of the heater 20 and the ground wire 91 to the mounting member 40. Therefore, the mounting structure of the heater 20 including the connection of the ground wire 91 can be simplified.

Then, as shown in FIG. 4, the mounting member 40 to which the heater 20 and the water temperature sensor 30 are fixed is arranged on the side wall 11a of the tank 10 while inserting the heater 20 and the water temperature sensor 30 into the insertion hole 12a and the support hole 13. do. Here, for example, when the position of the heater 20 and the position of the insertion hole 12a are deviated from each other, the connecting portion 70 is deformed to relatively change the position and posture between the fixed portion 50 and the bearing portion 60. You just have to adjust. As a result, the mounting member 40 can be mounted without deforming the fixed portion 50 and the bearing portion 60. Further, a thermal fuse 31 is arranged at the upper end of the fixed portion 50, and the thermal fuse 31 is attached between the tank 10 and the fixed portion 50.

Then, the screw 53 is tightened through the hole 52 to fix the mounting member 40 to the tank 10. Therefore, by fixing the mounting member 40 to the tank 10, the O-ring 81a can be pressed against the tank 10 via the spacer 80, so that the sealing performance can be improved.

Further, on the other side of the tank 10, an O-ring 81b and a cap 82 are attached to the end of the heater 20 on the insertion hole 12b side. In this way, the heater 20 can be attached to the tank 10.

As described in detail above, the following effects are obtained according to the present embodiment.
(1) The fastener 90 can be fixed to the bearing portion 60 so as to wrap the end portion of the heater 20. As a result, a gap is less likely to occur between the heater 20 and the shaft hole 66, and the heater 20 and the shaft hole 66 are less likely to move in a direction orthogonal to the axial direction of the shaft hole 66. In this way, rattling of the heater 20 caused by the mounting member 40 that attaches the heater 20 to the tank 10 can be suppressed.
(2) The end portion of the heater 20 and the ground wire 91 can be fixed to the bearing portion 60 by a single fastener 90. Therefore, the mounting structure of the heater 20 including the connection of the ground wire 91 can be simplified.
(3) The heat of the heater 20 is easily transferred to the water temperature sensor 30 and the temperature fuse 31 via the mounting member 40 formed of a metal having high thermal conductivity. In this way, the responsiveness of the water temperature sensor 30 and the thermal fuse 31 can be improved.
(4) The position and posture between the fixed portion 50 and the bearing portion 60 can be relatively adjusted by the connecting portion 70. Therefore, when the heater 20 is attached to the tank 10, the attachment position of the heater 20 can be adjusted. Therefore, the heater 20 can be easily attached.
(5) After the end portion of the heater 20 is inserted through the split ring 61, the fastener 90 is inserted into the first protrusion 62 and the second protrusion 63 via the first engagement hole 64 and the second engagement hole 65. Install. Then, by bringing the first protruding portion 62 and the second protruding portion 63 into contact with each other, the diameter of the split ring 61 can be reduced, so that the end portion of the heater 20 can be fixed to the bearing portion 60. Therefore, the heater 20 can be easily attached.
(6) Compared with the case where the heater and the mounting member are integrally configured, in the present embodiment, the heater 20 and the mounting member 40 are separately configured, and processing for integrating the heater 20 and the mounting member 40 is required. Since it does not, the cost can be reduced. When the heater 20 needs to be replaced, the heater 20 can be removed from the mounting member 40 and only the heater 20 can be replaced.

The above embodiment may be changed as shown below.

As shown in FIG. 8, the second protruding portion 163 of the bearing portion 160 of the mounting member 140 projects radially outward from one of the two ends of the split ring 61, similarly to the first protruding portion 62. It may be provided so as to do so.

-Both the first engaging hole 64 and the second engaging hole 65 may be formed in the screw hole.

-The fastener 90 may be, for example, a bolt and a nut.

As shown in FIG. 9, the first engaging hole 264 of the bearing portion 260 in the mounting member 240 may be formed as an elongated hole. The elongated hole is formed in a hole that is elongated in the direction in which the first protruding portion 262 protrudes. In this case, the engaging hole 65 may be formed in the screw hole, and a screw may be used as an example of the fastener 90. Further, both engaging holes may be elongated holes. In this case, bolts and nuts may be used as an example of the fastener 90.

According to this, since at least one engaging hole is an elongated hole, it is possible to easily attach the fastener to the pair of engaging holes as compared with the case where the pair of engaging holes are not elongated. That is, the heater 20 can be easily attached to the attachment member 40.

A bearing portion 60 having an inner diameter larger than the outer diameter of the end portion of the heater 20 may be used. In this case, it is preferable to provide screw holes in the radial direction of the cylindrical bearing portion 60. According to this, the screw is screwed into the screw hole with the end portion of the heater 20 inserted through the bearing portion 60. Then, by pressing the tip of the screw against the heater 20, the end of the heater 20 can be fixed. Further, the ground wire 91 can be fixed with a screw that fixes the end portion of the heater 20.

The hot water tank 1 is not limited to the local cleaning device 110, and may be provided in a device that heats the liquid stored in the tank 10. For example, the hot water tank 1 may be provided in a coffee maker, a water server, or the like.

1: Hot water tank 10: Tanks 11a, 11b: Side walls 12a, 12b: Insertion holes 13: Support holes 20: Heater 30: Water temperature sensor 31: Temperature fuse 32: Vacuum breaker 33: High temperature ejection prevention part 35: Mounting structures 40, 140 240: Mounting member 50: Fixed portion 51, 52: Hole 53: Screw 60, 160, 260: Bearing portion 61: Split ring 62, 262: First protruding portion 63, 163: Second protruding portion 64: First Engagement hole 65: Second engagement hole 66: Shaft hole 70: Connecting part 80: Spacer 81a, 81b: Seal member 82: Cap 90: Fastener 91: Earth wire 100: Toilet bowl 110: Local cleaning device 120: Main body 121: Water supply valve 122: Water flow amount adjusting valve 123: Cleaning nozzle 124: Control unit 130: Toilet seat 140: Toilet lid 150: Operation unit

Claims (7)

A tank for storing liquid and
A heater that is inserted into the insertion hole formed in the tank and heats the liquid stored in the tank.
A water temperature sensor that is inserted into a support hole formed in the tank and measures the temperature of the liquid stored in the tank.
A fixed portion fixed to the tank, a bearing portion having a shaft hole through which the end of the heater protruding from the insertion hole is inserted, and an end of the water temperature sensor protruding from the support hole are inserted. A mounting member having a hole to be formed,
By reducing the diameter of the shaft hole, the bearing portion is provided with a fastener for fixing the end portion of the heater.
The bearing portion is formed by bending a plate-shaped member, and the axial length of the bearing portion is larger than the thickness of the plate-shaped member.
The mounting member is a hot water tank formed of metal and in contact with both the water temperature sensor and a thermal fuse that shuts off energization of the heater when an excessive temperature rise of the tank occurs. Before SL fasteners hot water tank according to claim 1 for securing the ground wire to the bearing portion. The hot water tank according to claim 1 or 2, wherein the hole is formed through the side surface of the fixed portion. The mounting member further includes a connecting portion that connects the fixed portion and the bearing portion.
The connecting portion has lower rigidity than the fixed portion and the bearing portion, and is formed by bending.
The hot water tank according to claim 1 to 3, wherein the heater and the water temperature sensor are supported by the mounting member in parallel with each other's insertion shafts. The bearing portion has a split ring in which a part in the circumferential direction is separated so as to have two ends to form the shaft hole, and the split ring is directed from the two ends to the outside of the split ring. An annular clamp having a pair of protrusions, each of which protrudes.
The hot water tank according to any one of claims 1 to 4, wherein an engaging hole that engages with the fastener is formed in each of the pair of protruding portions. The hot water tank according to claim 5, wherein at least one of the pair of engaging holes is an elongated hole. The hot water tank according to any one of claims 1 to 6.
A local cleaning device including a cleaning nozzle for ejecting a liquid stored in the hot water tank.

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