JP2018100819A - Hot water tank and local washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water tank that is less likely to generate a rattle of a heater caused by a fitting member for fitting the heater to the tank.SOLUTION: A hot water tank comprises: a tank 10 for storing liquid; a heater 20 inserted into an insertion hole 12a formed in the tank 10 to heat the liquid stored in the tank 10; a fitting member 40 including a fixed part 50 fixed to the tank 10, and a bearing part 60 including a shaft hole 66 into which an end part of the heater 20 protruded from the insertion hole 12a is inserted; and a fastening tool 90 for fixing the end part of the heater 20 to the bearing part 60 by reducing the diameter of the shaft hole 66.SELECTED DRAWING: Figure 4

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 that stores water, a heater that heats water in the hot water storage tank, and a cleaning nozzle that ejects water heated by the heater are provided. A local cleaning device for cleaning a local body part is known.

  Some of these local cleaning apparatuses include a pressing 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 apparatus, the pressing member is formed with an insertion hole through which the end of the heater is inserted.

JP 2003-139403 A

  By the way, in the above-mentioned local cleaning apparatus, after the end portion of the heater is inserted into the insertion hole, the pressing member is screwed to the outer wall of the hot water storage tank in the axial direction of the end portion of the heater so that the heater is Fixed to. For this reason, in order to make it easy to insert the end portion of the heater into the insertion hole, the inner diameter of the insertion hole may be larger than the outer diameter of the heater. However, in this case, since a gap is formed between the heater and the insertion hole, the heater may rattle in a direction orthogonal to the axial direction of the insertion hole. That is, there is a possibility that rattling of the heater occurs after the heater is attached to the hot water storage tank.

  The present invention has been made in view of such circumstances. An object of the present invention is to provide a hot water tank that is less likely to cause rattling of the heater due to an attachment member that attaches the heater to the tank.

  A 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 that heats the liquid stored in the tank, and is fixed to the tank. And a bearing member having a shaft hole through which the end of the heater protruded from the insertion hole is inserted, and by reducing the diameter of the shaft hole, And a fastener for fixing the end.

  According to the above configuration, the diameter of the shaft hole through which the end of the heater is inserted can be reduced by the fastener. For this reason, it can fix to a bearing part so that the edge part of a heater may be wrapped. As a result, a gap is hardly generated between the heater and the shaft hole, and the heater is difficult to move in a direction orthogonal to the axial direction of the shaft hole. Thus, the rattling of the heater due to the mounting member for attaching the heater to the tank can be suppressed.

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

  According to the said structure, the edge part of a heater and an earth wire can be fixed to a bearing part with 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. For this reason, the heater mounting structure including the connection of the ground wire can be simplified.

  In the hot water tank, the mounting member is made of metal, and a thermistor that measures the temperature of the liquid stored in the tank, and a temperature at which the heater is cut off when an excessive temperature rise is detected. It is preferable to contact at least one of the fuses.

  According to the said structure, the heat | fever of a heater tends to be transmitted to a thermistor and a thermal fuse via the attachment member formed with a metal with high heat conductivity. Thus, the responsiveness of the thermistor and the thermal fuse can be improved.

  In the hot water tank, the attachment member further includes a connecting portion that connects the fixed portion and the bearing portion, and the connecting portion has lower rigidity than the fixed portion and the bearing portion. preferable.

  According to the said structure, in order to set it as a connection part with low rigidity compared with a to-be-fixed part and a bearing part, a connection part can be deformed. Thus, 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. For this reason, attachment of a heater can be made easy.

  In the hot water tank, the bearing portion has a split ring partially separated in the circumferential direction so as to have two ends, and projects from the two end portions of the split ring toward the outside of the split ring. It is preferable that each of the pair of protrusions is formed with an engagement hole that engages with the fastener.

  According to the said structure, after inserting the edge part of a heater in a split ring part, a fastener is attached to a protrusion part via an engagement hole. And since the diameter of a split ring part can be made small by narrowing the space | interval of a pair of protrusion parts, the edge part of a heater can be fixed to a bearing part. For this reason, attachment of a heater can be made easy.

  In the hot water tank, it is preferable that at least one of the pair of engagement holes is a long hole.

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

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

  According to the above configuration, the effect obtained by the above-described hot water tank can be obtained in the local cleaning device.

The perspective view of the local washing | cleaning apparatus which concerns on one Embodiment. The perspective view of the hot water tank with which a local washing | cleaning apparatus is provided. The side view of a hot water tank. Sectional drawing of a hot water tank. The perspective view of an attachment member. The disassembled perspective view of the structure containing an attachment member and a heater. The perspective view of a structure containing an attachment member and a heater. The side view of the attachment member which concerns on a 1st modification. The side view of the attachment member which concerns on a 2nd modification.

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

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

  The main body 120 is provided at the upper rear of the toilet 100. The main body 120 is made of resin, for example. The main body 120 is formed in the 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 rate, and water supplied from the hot water tank 1 And a control unit 124 that controls the driving of the components of the local cleaning device 110 are incorporated.

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

  The hot water tank 1 stores the water supplied from the water supply valve 121. And the warm water tank 1 heats the stored water to warm water of a predetermined temperature. 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 adjustment valve 122 is provided between the hot water tank 1 and the cleaning nozzle 123. The water flow adjustment valve 122 adjusts the water flow of the 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 application. 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 user can fit in the main body 120. When the user's local part is washed by the washing nozzle 123, the washing nozzle 123 moves forward and sprays hot water from the tip of the washing nozzle 123.

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

  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 includes buttons 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.

  As shown in FIGS. 2 and 3, the hot water tank 1 includes a tank 10 that stores water, a heater 20 that heats the water stored in the tank 10, and a water temperature sensor 30 that measures the temperature of the water stored in the tank 10. And a temperature fuse 31 that cuts off the power to the heater 20 when an excessive temperature rise in the tank 10 is detected, a vacuum breaker 32 that prevents a reverse flow of water supplied to the outside, and a water temperature that rises excessively A water temperature detecting section 33 for stopping the supply of water, an earth wire 91 for grounding, and a mounting structure 35 for attaching the heater 20, the water temperature sensor 30 and the earth wire 91 to the tank 10 are provided.

  As shown in FIGS. 2 and 3, the tank 10 has a box shape. As shown in FIG. 4, the tank 10 has insertion holes 12 a and 12 b through which the heater 20 is inserted in the side walls 11 a and 11 b of the tank 10. The insertion holes 12 a and 12 b are formed so as to make a pair with both side walls 11 a and 11 b facing 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 12 a and 12 b, and both end portions 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 a thermistor, for example. The water temperature measured by the water temperature sensor 30 is used when controlling the driving of the heater 20.

  The thermal fuse 31 is disposed in the middle of the energization circuit of the heater 20. The thermal fuse 21 cuts off the power supply to the heater 20 when an excessive temperature rise of the tank 10 occurs. Further, the thermal fuse 31 does not return when performing an operation to cut off the power supply to the heater 20. Thus, 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. For this reason, 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 preventing part 33 is provided on the upper surface of the tank 10. The high-temperature ejection preventing unit 33 is mainly composed of a temperature-sensitive reed switch, and stops the supply of warm water to the outside when the excessive temperature rise of the water temperature is detected, and stops the ejection of warm water from the cleaning nozzle 123.

  Next, the attachment structure 35 will be described.

  As shown in FIGS. 4, 6, and 7, the attachment structure 35 includes an O-ring 81 b having a sealing function on the side wall 11 b side of the tank 10, a cap 82 that closes the insertion hole 12 b formed in the tank 10, It has. The mounting structure 35 includes, on the side wall 11a side of the tank 10, a mounting member 40 that supports the heater 20 and the water temperature sensor 30, a screw 53 that fixes the mounting member 40 to the tank 10, and a sealing member 81a having a sealing function. The spacer 80 for fixing the seal member 81a to the tank 10 and the 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 81 b and the cap 82 fix the end of the heater 20 on the side wall 11 b side of the tank 10. The cap 82 is configured to press the O-ring 81 b against the tank 10 when attached to the tank 10.

  The attachment member 40 is made of metal. The mounting member 40 is preferably a relatively soft metal material, such as copper. As shown in FIG. 5, the attachment member 40 includes a fixed portion 50 fixed to the tank 10, a bearing portion 60 through which an end of the heater 20 protruded from the insertion hole 12 a is inserted, and the fixed portion 50. It has the connection part 70 which connects the bearing part 60. FIG.

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

  The bearing portion 60 includes a split ring 61 that is partially separated in the circumferential direction so as to have two ends, and a pair of projecting portions that project from the two ends of the split ring 61 (the first projecting portion 62 and the first projecting portion 62). 2 projection 63). A shaft hole 66 through which the end of the heater 20 is inserted is formed inside the split ring 61.

  The first protrusion 62 protrudes radially outward from one of the two ends of the split ring 61. The second protrusion 63 protrudes outward in the circumferential direction from the other of the two ends of the split ring 61. In this respect, the first protrusion 62 and the second protrusion 63 protrude outward from the two ends of the split ring 61, respectively.

  The bearing portion 60 is formed by bending a plate-like member. Here, in the bearing portion 60 of the present embodiment, the first protrusion 62 is bent with respect to the split ring 61, while the second protrusion 63 is linear with respect to the split ring 61. That is, it is not necessary to perform a process for bending both the first projecting part 62 and the second projecting part 63, and the labor required for the process is omitted.

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

  The connecting portion 70 protrudes 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 part 70 is formed in a plate shape in which the fixed part 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 lower rigidity than the fixed portion 50 and the bearing portion 60. Therefore, the relative positional relationship and posture of the fixed part 50 and the bearing part 60 can be adjusted by deforming the connecting part 70 by applying a bending load and a moment to the connecting part 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 of the heater 20 is inserted through the O-ring 81, the spacer 80, and the split ring 61 (shaft hole 66) of the mounting member 40 in this order. Then, by tightening the fastener 90 via the first engagement hole 64 and the second engagement hole 65, the interval between the first protrusion 62 and the second protrusion 63 is narrowed, and the split ring of the bearing 60 is obtained. The diameter of 61 (shaft hole 66) is reduced. In this regard, in the present embodiment, it can be said that the shaft hole 66 is reduced in diameter by the fastener 90 in the bearing portion 60. Thus, the end portion of the heater 20 is fixed to the attachment member 40. Further, the water temperature sensor 30 is inserted into the support hole 12 of the mounting member 40, and the water temperature sensor 30 is fixed to the mounting member 40.

  When fastening the fastener 90, the ground wire 91 is fastened together with the fastener. Thus, the end portion of the heater 20 and the ground wire 91 can be fixed to the mounting member 40 by the fastener 90. For this reason, the attachment 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 disposed on the side wall 11 a of the tank 10 while the heater 20 and the water temperature sensor 30 are inserted through the insertion hole 12 a and the support hole 13. To do. Here, for example, when the position of the heater 20 and the position of the insertion hole 12a are shifted, the connecting portion 70 is deformed so that the position and posture between the fixed portion 50 and the bearing portion 60 are relatively set. Adjust it. Thereby, the attachment member 40 can be attached without deforming the fixed part 50 and the bearing part 60. Further, the thermal fuse 31 is disposed at the upper end of the fixed part 50, and the thermal fuse 31 is attached between the tank 10 and the fixed part 50.

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

  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. Thus, the heater 20 can be attached to the tank 10.

As described above in detail, according to the present embodiment, the following effects are obtained.
(1) With the fastener 90, it can fix to the bearing part 60 so that the edge part of the heater 20 may be wrapped. As a result, a gap is hardly generated 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. Thus, rattling of the heater 20 due to 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 the single fastener 90. For this reason, the attachment 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 transmitted to the water temperature sensor 30 and the thermal fuse 31 through the mounting member 40 formed of a metal having high thermal conductivity. Thus, 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. For this reason, the heater 20 can be easily attached.
(5) After the end of the heater 20 is inserted into 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. And since the split ring 61 can be diameter-reduced by making the 1st protrusion part 62 and the 2nd protrusion part 63 contact, the edge part of the heater 20 can be fixed to the bearing part 60. FIG. For this reason, the heater 20 can be easily attached.
(6) Compared to the case where the heater and the mounting member are integrally formed, in the present embodiment, the heater 20 and the mounting member 40 are configured separately, and processing for integrating the heater 20 and the mounting member 40 is required. 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.

  In addition, you may change the said embodiment as shown below.

  As shown in FIG. 8, the second protruding portion 163 of the bearing portion 160 in the mounting member 140 protrudes radially outward from one of the two end portions of the split ring 61 in the same manner as the first protruding portion 62. May be provided.

  -You may form both the 1st engagement hole 64 and the 2nd engagement hole 65 in a screw hole.

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

  -As shown in FIG. 9, you may form the 1st engagement hole 264 of the bearing part 260 in the attachment member 240 in a long hole. The long hole is formed as a hole that is long in the direction in which the first protrusion 262 protrudes. In this case, the engagement hole 65 may be formed as a screw hole, and a screw may be used as an example of the fastener 90. Further, both engagement holes may be long holes. In this case, bolts and nuts may be used as an example of the fastener 90.

  According to this, since at least one engagement hole is a long hole, it is easier to attach the fastener to the pair of engagement holes than when the pair of engagement holes is not a long hole. That is, the heater 20 can be easily attached to the attachment member 40.

  -The bearing part 60 which has an internal diameter larger than the outer diameter of the edge part of the heater 20 may be sufficient. In this case, it is preferable to provide a screw hole in the radial direction of the cylindrical bearing portion 60. According to this, the screw is screwed into the screw hole in a state where the end portion of the heater 20 is inserted into the bearing portion 60. Then, the end of the heater 20 can be fixed by pressing the tip of the screw against the heater 20. The ground wire 91 can also be fixed with a screw for fixing the end of the heater 20.

  The hot water tank 1 may be provided not only in the local cleaning device 110 but also 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 hole 13: Support hole 20: Heater 30: Water temperature sensor 31: Thermal fuse 32: Vacuum breaker 33: High temperature jet prevention part 35: Mounting structure 40, 140 240: mounting member 50: fixed portion 51, 52: hole 53: screw 60, 160, 260: bearing portion 61: split ring 62, 262: first protrusion 63, 163: second protrusion 64: first Engagement hole 65: second engagement hole 66: shaft hole 70: connecting portion 80: spacer 81a, 81b: seal member 82: cap 90: fastener 91: ground wire 100: toilet 110: local cleaning device 120: main body 121: Water supply valve 122: Water flow adjustment valve 123: Cleaning nozzle 124: Control unit 130: Toilet seat 140: Toilet lid 150: Operation unit

Claims (7)

A tank for storing liquid;
A heater that is inserted through an insertion hole formed in the tank and heats the liquid stored in the tank;
A mounting member having a fixed portion fixed to the tank and a bearing portion having a shaft hole through which an end portion of the heater protruded from the insertion hole is inserted;
A hot water tank comprising: a fastener that fixes an end of the heater to the bearing portion by reducing the diameter of the shaft hole. The attachment member is made of metal,
The hot water tank according to claim 1, wherein the fastener fixes a ground wire to the bearing portion. The mounting member is
Formed by metal,
The thermistor which measures the temperature of the liquid stored in the said tank, and the temperature fuse which interrupts | blocks the electricity supply to the said heater when excessive temperature rise of the said tank contact | abuts. Hot water tank. The mounting member further includes a connecting portion that connects the fixed portion and the bearing portion;
The hot water tank according to any one of claims 1 to 3, wherein the connecting portion has lower rigidity than the fixed portion and the bearing portion. The bearing part has a split ring in which a part of the circumferential direction is separated to form the shaft hole so as to have two end parts, and the two end parts of the split ring face the outside of the split ring. An annular clamp having a pair of projecting portions each projecting,
The hot water tank according to any one of claims 1 to 4, wherein an engagement hole that engages with the fastener is formed in each of the pair of protrusions. The hot water tank according to claim 5, wherein at least one engagement hole of the pair of engagement holes is a long hole. The hot water tank according to any one of claims 1 to 6,
A local cleaning apparatus comprising: a cleaning nozzle that ejects liquid stored in the hot water tank.

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