JPH01296119A - Pressure sensor - Google Patents
Pressure sensorInfo
- Publication number
- JPH01296119A JPH01296119A JP12642288A JP12642288A JPH01296119A JP H01296119 A JPH01296119 A JP H01296119A JP 12642288 A JP12642288 A JP 12642288A JP 12642288 A JP12642288 A JP 12642288A JP H01296119 A JPH01296119 A JP H01296119A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- diaphragm
- element support
- pressure transmission
- transmission chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 239000005001 laminate film Substances 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、浴槽等の水位を圧力として検知する圧力検知
センナに関するものであり、浴槽へ自動的に湯張りを行
う自動風呂等に用いられるものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a pressure detection sensor that detects the water level in a bathtub or the like as pressure, and is used in an automatic bath or the like that automatically fills the bathtub with hot water. be.
従来の技術 従来のこの種の圧力検知センサを第３図に示す。Conventional technology A conventional pressure detection sensor of this type is shown in FIG.
１は浴槽もしくは浴槽に連通したパイプであシ、水が充
填していて浴槽の水位に応じてその圧力が変化するもの
であり、２はセンサ取付台である。Reference numeral 1 is a bathtub or a pipe connected to the bathtub, which is filled with water and whose pressure changes depending on the water level in the bathtub, and 2 is a sensor mounting base.
３は圧力検知素子であり、筒状の圧力導入口４を有する
。５は圧力検知素子３を支持する素子支持体であシ、前
記圧力導入口４を開口５ａにさしこませて圧力導入口４
に連通させた圧力伝達室６を有する。７はゴムのダイヤ
フラムであり、センサ取付台２と素子支持体５とをビス
８で結合するときに圧力伝達室６を密閉し、バイブ１内
の充填水と圧力検知素子３とを隔離すると同時に圧力を
伝達させる役目を果す。９はダイヤフラム７で密閉され
た圧力伝達室６内に充填した流動性の充填材であり、例
えばシリコンオイル等を用いる。ダイヤフラム７で水と
圧力検知素子３とを隔離する理由は、汚れた浴槽水で圧
力検知素子３が腐蝕したリ、圧力導入口４がつまったり
、水の凍結で異常をおこしたり、電圧サージが水を伝搬
して圧力検知素子３を破壊したりするのを防止し、かつ
、圧力を正確に伝達させるためである。また充填材９を
用いる理由は、もし充填材を用いないで空気層を形成さ
せている場合には水の圧力変化で空気の圧縮度合が大き
く変化してゴムダイヤフラム７の動作点が移動し圧力伝
達特性に影響をおよぼして好ましくないからであり、ま
た水の温度は大きく変化するが、その時空気の体積も大
きく変化し前記と同様の悪影響をおよぼすのを防止する
ためである。１０は圧力検知素子３の信号を処理する回
路、１１はそれらを支持するプリント板、１２は蓋であ
る。3 is a pressure sensing element, which has a cylindrical pressure introduction port 4. Reference numeral 5 denotes an element support for supporting the pressure sensing element 3, and the pressure inlet 4 is inserted into the opening 5a to open the pressure inlet 4.
It has a pressure transmission chamber 6 which is communicated with. Reference numeral 7 denotes a rubber diaphragm, which seals the pressure transmission chamber 6 when connecting the sensor mounting base 2 and the element support 5 with screws 8, and isolates the water filled in the vibrator 1 from the pressure detection element 3. It plays the role of transmitting pressure. Reference numeral 9 denotes a fluid filler filled in the pressure transmission chamber 6 sealed by the diaphragm 7, and silicone oil or the like is used, for example. The reason why the diaphragm 7 is used to separate the water and the pressure sensing element 3 is to prevent the pressure sensing element 3 from being corroded by dirty bath water, the pressure inlet 4 becoming clogged, water freezing causing abnormalities, and voltage surges. This is to prevent water from propagating and destroying the pressure sensing element 3, and to transmit pressure accurately. The reason why the filler 9 is used is that if an air layer is formed without using a filler, the degree of compression of the air will change greatly due to changes in the pressure of the water, and the operating point of the rubber diaphragm 7 will shift, resulting in pressure This is because it affects the transmission characteristics, which is undesirable.Also, since the temperature of water changes greatly, the volume of air also changes greatly at that time, and this is to prevent the same adverse effects as described above. 10 is a circuit for processing signals from the pressure sensing element 3, 11 is a printed board that supports them, and 12 is a lid.
発明が解決しようとする課題
しかしながら上記のような構成では、ダイヤフラム７と
してゴムを使用しているため、下記の課題を有すること
がわかった。パイプ１の水は、浴槽水を空にするたびに
空になって空気に置換される。ところが、その空気が微
量づつではあるがゴムのダイヤフラム７を透過し、長年
の間に充填材９内に気泡を生じさせる。その気泡が上記
した充填材を圧力伝達室６に充填しない場合の説明と同
様の悪影響を及ぼし、圧力伝達特性を悪くすることがわ
かった。Problems to be Solved by the Invention However, in the above configuration, since rubber is used as the diaphragm 7, it has been found that the following problems occur. The water in the pipe 1 is emptied and replaced with air every time the bathtub water is emptied. However, the air passes through the rubber diaphragm 7, albeit in small amounts, and bubbles are generated in the filler material 9 over many years. It has been found that the bubbles have the same adverse effect as described in the case where the pressure transmission chamber 6 is not filled with the above-mentioned filler material, and deteriorate the pressure transmission characteristics.
本発明はかかる従来の課題を解消するもので、空気の透
過を防止するとともにこのダイヤフラム等の圧力伝達膜
をヒートシールして容易に取付けられ、かつ、位置ずれ
のないようにして安定した性能を発揮する圧力センサを
提供するものである。The present invention solves these conventional problems. It prevents air permeation, heat-seals the pressure transmission membrane such as the diaphragm, makes it easy to install, and ensures stable performance by preventing positional deviation. The present invention provides a pressure sensor that exhibits high performance.
課題を解決するだめの手段
上記課題を解決するために本発明の圧力センサは、圧力
検知素子に圧力を伝える圧力伝達膜を、少なくとも金属
と樹脂の二層からなる膜で形成し、この圧力伝達膜は素
子支持体の圧力伝達室側に樹脂面を配置して素子支持体
にヒートシールし、前記素子支持体のヒートシール面に
径がφ０１のへこみ部を設け、前記圧力伝達膜の径φＤ
２を前記へこみ部より小さくしたものである。Means for Solving the Problems In order to solve the above problems, the pressure sensor of the present invention has a pressure transmission film that transmits pressure to the pressure sensing element, which is formed of a film made of at least two layers of metal and resin. The membrane is heat-sealed to the element support with a resin surface placed on the side of the pressure transmission chamber of the element support, and a recess with a diameter of φ01 is provided on the heat-sealed surface of the element support, and the diameter of the pressure transmission membrane is φD.
2 is made smaller than the recessed portion.
作 用
本発明は上記構成によって、隔離すべき水等と圧力検知
素子間は圧力伝達膜をなす金属層で隔離できるために、
微量な空気の透過を防止できるもので、かつ、ヒートシ
ール面のへこみ部により、圧力伝達膜のヒートシール時
の取付ずれを防止し、かつ、安定したヒートシールがで
きるものである。Effects of the present invention With the above configuration, the water to be isolated and the pressure sensing element can be isolated by the metal layer forming the pressure transmission membrane.
It can prevent the permeation of a small amount of air, and the recessed portion on the heat-sealing surface prevents the pressure transmission membrane from slipping during heat-sealing, and allows for stable heat-sealing.
実施例 以下、本発明の実施例を第１図にもとすいて説明する。Example Hereinafter, embodiments of the present invention will be described with reference to FIG.
なお、上記従来技術と同一部分には同一符号を付して詳
細な説明は省略し、異なる部分を中心に説明する。また
、第２図は第１図のダイヤフラム端部の要部拡大断面図
である。第３図と異なる点は、圧力伝達膜としてのダイ
ヤフラム１３としては少なくとも金属層１４と樹脂層１
５の２層からなる多層構造の、つまりラミネートフィル
ムによるダイヤフラムを用い、かつ、樹脂製の素子支持
体５の圧力伝達室６側にその樹脂面を配置して、その端
部１６を素子支持体５にヒートノールして圧力伝達室６
を密閉した点にある。また、１７はセンサ取付台２から
外部に水が洩れるのを防止するための０リングである。Note that the same parts as those in the prior art described above are given the same reference numerals, detailed explanations are omitted, and different parts will be mainly explained. Further, FIG. 2 is an enlarged sectional view of a main part of the end of the diaphragm shown in FIG. 1. The difference from FIG. 3 is that the diaphragm 13 as a pressure transmission film includes at least a metal layer 14 and a resin layer 1.
A diaphragm having a multilayer structure consisting of two layers (5), that is, a diaphragm made of a laminate film, is used, and the resin surface is placed on the pressure transmission chamber 6 side of the element support 5 made of resin, and the end portion 16 is placed on the element support 5. 5 and pressure transfer chamber 6.
The point is that it is sealed. Further, 17 is an O-ring for preventing water from leaking from the sensor mounting base 2 to the outside.
そして、前記素子支持体５のヒートシール面にはφＤ１
の直径を有し、Ｗの深さのＶ状のへこみ部１８を設けて
あり、そのへこみ部１８上に、φｏ１より小さいφＤ２
の外径を有するダイヤフラム１３を配置して前記ダイヤ
フラム１３と素子支持体５をヒートシールしたものであ
る。Ｗとしては、１ｍｍ前後にしてあり、ダイヤフラム
の厚さよりも深くシである。The heat sealing surface of the element support 5 has a diameter of φD1.
A V-shaped recess 18 with a diameter of
A diaphragm 13 having an outer diameter of is disposed and the diaphragm 13 and the element support 5 are heat-sealed. W is approximately 1 mm, which is deeper than the thickness of the diaphragm.
発明の効果
以上のように本発明の圧力センサは、水等の被圧力検出
体から圧力検知素子を隔離する圧力伝達膜を、少なくと
も金属と樹脂の二層からなる膜で形成するとともに素子
支持体の圧力伝達室側に前記樹脂面を配置し、且つ、素
子支持体に一ビ形状のへこみ部を設け、そのへこみ部に
このへこみ部より外径の小さい前記圧力伝達膜を配置し
てヒートシールしたもので、次の効果を有する。Effects of the Invention As described above, in the pressure sensor of the present invention, the pressure transmission membrane that isolates the pressure sensing element from the pressure sensing object such as water is formed of a membrane consisting of at least two layers of metal and resin, and the element support The resin surface is placed on the side of the pressure transmission chamber, and the element support is provided with a bi-shaped recess, and the pressure transmission membrane having an outer diameter smaller than the recess is placed in the recess, and heat-sealed. It has the following effects.
（リ 素子支持体のへこみ部に、圧力伝達膜を置いてヒ
ートシールできるので、ヒートシール作業が容易である
とともに圧力伝達膜の中心ずれを防止できる。(Re) Since the pressure transmission membrane can be placed in the recessed part of the element support and heat-sealed, the heat-sealing operation is easy and the center shift of the pressure transmission membrane can be prevented.
（２）圧力伝達膜の中心ずれが防止できるので、ヒート
／−ル凌の圧力伝達膜の剛性バラツキが少なく、安定し
た特性の圧力センサを提供できる。(2) Since the center shift of the pressure transmission membrane can be prevented, there is less variation in the rigidity of the pressure transmission membrane of the heat/ru type, and a pressure sensor with stable characteristics can be provided.
第１図は本発明の一実施例における圧力センサの断面図
、第２図は同センサのダイヤフラム端部拡大断面図、第
３図は従来の圧力センサの断面図である。
３・・・・・・圧力検知素子、４・・・・・・圧力導入
口、５・・・・・・素子支持体、６・・・・・・圧力伝
達室、９・・・・・・充填材、１３・・・・・・多層構
造のダイヤフラム、１４・・・・・・金属、１５・・・
・・・樹脂、１８・・・・・・１ｒ形状へこみ部、φ０
１・・・・・へこみ部の内径、φＤ２・・・・・・ダイ
ヤフラムの外径。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名３−
圧１ｊＪ！短素子
４− 圧力溝入口
５− 累子支苔牛
６−圧力伝達室
１８−゛へ＝Ｈ部
１３ −・−ダ イ ｉ フ ラ ム１４−
金１層
ｒ５−＊リ 月珈 層
１８−− へ 二 Ｈ５
第２図 φＤｌ−Ａ、−Ｍ＠（Ｌ）ＪＬｈφ
〉 ・・ ｉ イ Ｙフ５ムの外慢
第３図FIG. 1 is a sectional view of a pressure sensor according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the diaphragm end of the same sensor, and FIG. 3 is a sectional view of a conventional pressure sensor. 3...Pressure detection element, 4...Pressure inlet, 5...Element support, 6...Pressure transmission chamber, 9... - Filler, 13...Multilayer structure diaphragm, 14...Metal, 15...
...Resin, 18...1r-shaped recessed part, φ0
1: Inner diameter of the recess, φD2: Outer diameter of the diaphragm. Name of agent: Patent attorney Toshio Nakao and 1 other person3-
Pressure 1jJ! Short element 4- Pressure groove inlet 5- Shifter support moss cow 6- Pressure transmission chamber 18-To = H section 13--Die i frame 14-
Gold 1st layer r5-*Li Moon layer 18-- To 2 H5 Fig. 2 φDl-A, -M@(L)JLhφ
〉 ・・・i I Y F5m's Arrogance Figure 3
Claims (1)
連通した圧力伝達室を有する素子支持体と、少なくとも
金属と樹脂の二層からなり、前記素子支持体の圧力伝達
室側に前記樹脂面を配置して前記素子支持体にヒートシ
ールし前記圧力伝達室を密閉する圧力伝達膜と、密閉さ
れた前記圧力伝達室に充填した流動性の充填材とからな
り、前記素子支持体のヒートシール面に直径がφＤ＿１
の■形状のへこみ部を設け、前記へこみ部に前記圧力伝
達膜を配置し、かつ、φＤ＿１より小さいφＤ＿２の外
径に前記圧力伝達膜を形成してなる圧力センサ。It consists of a pressure sensing element having a pressure introduction port, an element support having a pressure transmission chamber communicating with the pressure introduction port, and at least two layers of metal and resin, with the resin surface on the pressure transmission chamber side of the element support. and a fluid filler filled in the sealed pressure transmission chamber; The diameter on the surface is φD_1
A pressure sensor comprising: a recessed portion having a shape of 1; the pressure transmitting film is disposed in the recessed portion; and the pressure transmitting film is formed at an outer diameter of φD_2 smaller than φD_1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12642288A JPH01296119A (en) | 1988-05-24 | 1988-05-24 | Pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12642288A JPH01296119A (en) | 1988-05-24 | 1988-05-24 | Pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01296119A true JPH01296119A (en) | 1989-11-29 |
Family
ID=14934783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12642288A Pending JPH01296119A (en) | 1988-05-24 | 1988-05-24 | Pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01296119A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6333437B2 (en) * | 1983-10-17 | 1988-07-05 | Osutogen Baiojetsuto Intern Pty Ltd |
-
1988
- 1988-05-24 JP JP12642288A patent/JPH01296119A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6333437B2 (en) * | 1983-10-17 | 1988-07-05 | Osutogen Baiojetsuto Intern Pty Ltd |
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