JPH0116050Y2 - - Google Patents
Info
- Publication number
- JPH0116050Y2 JPH0116050Y2 JP1982118083U JP11808382U JPH0116050Y2 JP H0116050 Y2 JPH0116050 Y2 JP H0116050Y2 JP 1982118083 U JP1982118083 U JP 1982118083U JP 11808382 U JP11808382 U JP 11808382U JP H0116050 Y2 JPH0116050 Y2 JP H0116050Y2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- sensitive magnetic
- magnetic body
- shaped
- heat
- 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.)
- Expired
Links
- 230000005291 magnetic effect Effects 0.000 claims description 47
- 235000014676 Phragmites communis Nutrition 0.000 claims description 27
- 239000000696 magnetic material Substances 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 17
- 238000007664 blowing Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 description 17
- 230000007423 decrease Effects 0.000 description 6
- 230000004907 flux Effects 0.000 description 6
- 229910000859 α-Fe Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005307 ferromagnetism Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000005298 paramagnetic effect Effects 0.000 description 1
- 230000005408 paramagnetism Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Description
【考案の詳細な説明】
本考案はリードスイツチ、永久磁石及び感温磁
性体を組み合せた温度スイツチと発熱体とを用い
た送風検知装置に関する。[Detailed Description of the Invention] The present invention relates to an air blow detection device that uses a temperature switch that combines a reed switch, a permanent magnet, and a temperature-sensitive magnetic material, and a heating element.
従来この種の送風検知装置は、Ｕ字状の感温磁
性体の凹部に棒状磁石を内接させ、リードスイツ
チをその棒状磁石に対向して設けられた温度スイ
ツチと、この温度スイツチのＵ字状の感温磁性体
の基部から間隙をもたせて設けられた通電発熱体
から構成されている。しかしながら、このような
構成では、間隙のため発熱体から感温磁性体への
熱の伝達が対流及び輻射によるため送風が完全に
停止しないと温度スイツチが動作せず、また送風
が停止してから温度スイツチが動作するまでの応
答時間が長いという欠点があつた。一方、前記応
答時間を短くするために、上記の間隙をもたせな
いで温度スイツチと発熱体を密着させるように構
成すると、発熱体から伝導によつて感温磁性体へ
熱が伝達されるので熱伝達効率が良くなる反面、
間隙がなくかつ感温磁性体と棒状磁石の間に空間
がなくて一体の構造であるため、送風による熱放
散が行なわれ難くなり、僅かに送風が低下しただ
けで温度スイツチが動作してしまうという欠点が
あつた。また、従来の発熱体は、通常の酸化被膜
抵抗体に定格ワツト以上になる電流を通電させた
ものであるため、送風が停止した場合に温度が上
がりすぎて抵抗体が焼損するという欠点があつ
た。 Conventionally, this type of airflow detection device has a bar magnet inscribed in a recess of a U-shaped temperature-sensitive magnetic material, a reed switch, a temperature switch provided opposite the bar magnet, and a U-shaped reed switch. It consists of an energized heating element provided with a gap from the base of a shaped temperature-sensitive magnetic body. However, in such a configuration, because of the gap, heat is transferred from the heating element to the temperature-sensitive magnetic material by convection and radiation, so the temperature switch does not operate unless the air blowing completely stops, and the temperature switch does not operate even after the air blowing has stopped. The drawback was that the response time for the temperature switch to operate was long. On the other hand, in order to shorten the response time, if the temperature switch and the heating element are arranged in close contact with each other without the above-mentioned gap, heat is transferred from the heating element to the temperature-sensitive magnetic material by conduction. While the transmission efficiency improves,
Since there is no gap and there is no space between the temperature-sensitive magnetic material and the bar magnet, which is an integrated structure, it becomes difficult to dissipate heat through air blowing, and the temperature switch will operate even if the air blowing level decreases slightly. There was a drawback. Furthermore, because conventional heating elements are made by passing a current exceeding the rated watt through a normal oxide film resistor, they have the disadvantage that when the air blowing stops, the temperature rises too much and the resistor burns out. Ta.
本考案の目的は上記従来の欠点を解決した送風
検知装置を堤供することにある。 An object of the present invention is to provide an air blow detection device that solves the above-mentioned conventional drawbacks.
本考案によれば、Ｕ字状の感温磁性体と該Ｕ字
状の感温磁性体の脚部に前記Ｕ字状の感温磁性体
の基部から離して設けられたリードスイツチと該
リードスイツチの近傍に前記Ｕ字状の感温磁性体
の基部から離され前記感温磁性体の脚部に接して
設けられた永久磁石とからなる温度スイツチと、
前記Ｕ字状の感温磁性体の基部に熱を伝導によつ
て伝える正特性サーミスタとを有する送風検知装
置が得られる。 According to the present invention, there is provided a U-shaped temperature-sensitive magnetic body, a reed switch provided on the leg of the U-shaped temperature-sensitive magnetic body away from a base of the U-shaped temperature-sensitive magnetic body, and the lead. a temperature switch comprising a permanent magnet provided near the switch, away from the base of the U-shaped temperature-sensitive magnetic body and in contact with the leg of the temperature-sensitive magnetic body;
A blowing air detection device is obtained which includes a positive temperature coefficient thermistor that transmits heat by conduction to the base of the U-shaped temperature-sensitive magnetic body.
以下図面を参照して詳細に説明する。 A detailed explanation will be given below with reference to the drawings.
第１図は従来の送風検知装置の構成を示した正
面図である。棒状磁石１をＵ字状の感温磁性体２
の凹部に内接させリードスイツチ３を磁石１に添
設した常開型の温度スイツチと、円柱状の酸化被
膜抵抗体からなる通電発熱体４とから構成され、
発熱体４を感温磁性体２のリードスイツチ３が設
けられる反対側に間隙ｇをもたせて対向配置して
いる。次に第１図を参照して従来の送風検知装置
の動作について説明する。 FIG. 1 is a front view showing the configuration of a conventional air blow detection device. A bar magnet 1 is connected to a U-shaped temperature-sensitive magnetic body 2
It consists of a normally open type temperature switch with a reed switch 3 attached to the magnet 1 and inscribed in the recess of the magnet 1, and a current-carrying heating element 4 made of a cylindrical oxide film resistor.
A heating element 4 is disposed opposite to the temperature-sensitive magnetic body 2 on the opposite side of the reed switch 3 with a gap g therebetween. Next, the operation of the conventional air blow detection device will be explained with reference to FIG.
通電発熱体４及び感温磁性体２に定格風速の送
風が当つているときには、発熱体４からの熱が送
風によつて放散され、感温磁性体２の温度がその
キユリー点未満に保たれるので温度スイツチは動
作しない。送風が止まると送風による熱放散が行
なわれず、感温磁性体２の温度が次第に上昇して
キユリー点に達すると、温度スイツチが動作し、
すなわちリードスイツチ３の接点が開離から閉成
状態になり送風の停止が検知される。 When the current-carrying heating element 4 and the temperature-sensitive magnetic body 2 are blown with air at the rated speed, the heat from the heating element 4 is dissipated by the air, and the temperature of the temperature-sensitive magnetic body 2 is kept below its Curie point. temperature switch will not work. When the airflow stops, heat dissipation by the airflow is not performed, and when the temperature of the temperature-sensitive magnetic body 2 gradually rises and reaches the Curie point, the temperature switch is activated.
That is, the contacts of the reed switch 3 change from open to closed, and the stop of air blowing is detected.
このような従来の構成では、間隙ｇがあるため
に、発熱体４から感温磁性体２への熱の伝達が対
流及び輻射によるため伝達効率が悪い。そのた
め、送風が停止した状態からの感温磁性体２の温
度上昇速度が遅く、送風停止から温度スイツチが
動作するまでの反応時間が長く、例えば60秒にも
なる。又、熱の伝達効率が悪いために、送風が完
全に停止しないと、十分な熱量が感温磁性体２に
供給されず、温度スイツチが動作しない。したが
つて、例えば風速５ｍ／secから風速１ｍ／secへ
の風速の低下を検出することができない。 In such a conventional configuration, due to the gap g, heat is transferred from the heating element 4 to the temperature-sensitive magnetic body 2 by convection and radiation, resulting in poor transfer efficiency. Therefore, the rate of temperature rise of the temperature-sensitive magnetic body 2 from the state where the air blowing is stopped is slow, and the reaction time from the air blowing stop to the operation of the temperature switch is long, for example, 60 seconds. Furthermore, due to the poor heat transfer efficiency, unless the air blowing is completely stopped, a sufficient amount of heat will not be supplied to the temperature-sensitive magnetic body 2, and the temperature switch will not operate. Therefore, for example, a decrease in wind speed from 5 m/sec to 1 m/sec cannot be detected.
一方、第１図の構成の送風検知装置において、
温度スイツチと発熱体４を密着させた場合、伝導
による熱伝達が行なわれるので熱伝達効率は良く
なる反面、間隙ｇが無いために送風の流れが妨げ
られて送風による熱放散が行なわれ難くなる。そ
のため、風速が定常値から僅かに低下、例えば定
格風速５ｍ／secに対し４ｍ／secになつただけで
短時間のうちに温度スイツチが動作してしまう。 On the other hand, in the air blowing detection device having the configuration shown in FIG.
When the temperature switch and the heating element 4 are brought into close contact with each other, heat transfer occurs through conduction, which improves the heat transfer efficiency.However, since there is no gap g, the flow of air is obstructed, making it difficult to dissipate heat by air. . Therefore, even if the wind speed slightly decreases from a steady value, for example, when the rated wind speed drops from 5 m/sec to 4 m/sec, the temperature switch will operate within a short period of time.
このように、従来の構成の送風検知装置では、
任意の風速対応特性を得るための温度スイツチの
動作温度や発熱体の発熱量等の選定が難しいもの
であつた。 In this way, in the conventional configuration of the airflow detection device,
It has been difficult to select the operating temperature of the temperature switch, the amount of heat generated by the heating element, etc. in order to obtain characteristics corresponding to arbitrary wind speeds.
又、従来の発熱体には酸化被膜抵抗体が用いら
れていたために、風が停止した場合に温度が上り
すぎて抵抗体が焼損するということがあつた。 Furthermore, since conventional heating elements used oxide film resistors, when the wind stopped, the temperature rose too high and the resistors were burned out.
第２図は本考案の一実施例の構成を示した正面
図である。図において、５はＵ字状の非導電性の
フエライト系感温磁性体で、その対の脚部５０，
５１′の間隔寸法はリードスイツチ３のガラス管
の長さ寸法より若干短く、脚部５１，５１′の先
端寄りにリードスイツチ３を挿入しうる孔５２が
互いに対応させて設けられている。６，６′は軸
方向に着磁された円筒状永久磁石であり、Ｕ字状
フエライト系感温磁性体５の脚部５１，５１′の
内面に孔５２と同一軸上に且つ互いに異磁極が対
向するように取り付けられており、永久磁石６，
６′間に5.0〜7.0mm程度のエアギヤツプが設けら
れている。孔５２と磁石６，６′の中央孔との連
通孔にリードスイツチ３を挿着して常閉型温度ス
イツチが構成される。７は自己温度保持機能を有
する発熱体、すなわち正特性サーミスタであり、
電極８，８′に挟まれ密着されている。電極８は
フエライト系感温磁性体５の基部なる感熱部に密
着されている。従つて正特性サーミスタ７からの
熱が電極８を介してフエライト系感温磁性体５の
感熱部に伝導によつて伝達される。 FIG. 2 is a front view showing the configuration of an embodiment of the present invention. In the figure, 5 is a U-shaped non-conductive ferrite-based temperature-sensitive magnetic material, and its pair of legs 50,
The interval between the legs 51' is slightly shorter than the length of the glass tube of the reed switch 3, and holes 52 into which the reed switch 3 can be inserted are provided near the tips of the legs 51, 51' so as to correspond to each other. Reference numerals 6 and 6' denote cylindrical permanent magnets magnetized in the axial direction, which are arranged on the inner surface of the legs 51 and 51' of the U-shaped ferrite-based temperature-sensitive magnetic body 5 on the same axis as the hole 52 and with different magnetic poles. are attached so that they face each other, and permanent magnets 6,
An air gap of approximately 5.0 to 7.0 mm is provided between 6'. A normally closed temperature switch is constructed by inserting the reed switch 3 into a communicating hole between the hole 52 and the center hole of the magnets 6, 6'. 7 is a heating element having a self-temperature maintenance function, that is, a positive temperature coefficient thermistor;
It is sandwiched between electrodes 8 and 8' and is in close contact with it. The electrode 8 is in close contact with the heat-sensitive portion, which is the base of the ferrite-based temperature-sensitive magnetic material 5. Therefore, the heat from the positive temperature coefficient thermistor 7 is transferred to the heat-sensitive portion of the ferrite-based temperature-sensitive magnetic material 5 via the electrode 8 by conduction.
第３図は第２図の実施例において取り付けを考
慮した場合の構成を示した斜視図である。Ｕ字状
フエライト系感温磁性体５の脚部５１，５１′の
先端の隅に小貫通孔５３が設けられている。又、
圧着板８１，８１′が設けられ、リベツト８２，
８２′によつて、感温磁性体５、電極８、正特性
サーミスタ７、電極８′が圧着固定されている。
感温磁性体５が非導電性であるので、圧着板８
１，８１′及びリベツト８２，８２′を金属性とし
ても、電極８，８′間の絶縁は保たれる。なお、
風は図のＡの矢印の方向から送られてくる。 FIG. 3 is a perspective view showing the configuration of the embodiment shown in FIG. 2 when mounting is taken into consideration. A small through hole 53 is provided at the corner of the tip of the leg portions 51, 51' of the U-shaped ferrite-based temperature-sensitive magnetic material 5. or,
Crimping plates 81, 81' are provided, and rivets 82,
The temperature-sensitive magnetic body 5, the electrode 8, the positive temperature coefficient thermistor 7, and the electrode 8' are crimped and fixed by 82'.
Since the temperature sensitive magnetic material 5 is non-conductive, the pressure bonding plate 8
Even if 1, 81' and rivets 82, 82' are made of metal, insulation between electrodes 8, 8' can be maintained. In addition,
The wind is coming from the direction of arrow A in the diagram.
第４図は本考案による送風検知装置用の絶縁性
保持枠の一例を示した斜視図である。保持枠９
は、外形が方形で、上辺の中央部が感温磁性体５
の脚部５１，５１′の外面に内接できるように切
り取られ、その端面に孔５３に対応する孔９１が
設けられている。また保持枠９の直立辺には、機
器へ固定するための取付穴を設けた取付片９２が
一体的に形成されると共にリードスイツチ３のリ
ード接続用の端子板９３と正特性サーミスタ７の
電極８，８′を接続するための端子板９４が固着
されている。 FIG. 4 is a perspective view showing an example of an insulating holding frame for an airflow detection device according to the present invention. Holding frame 9
The outer shape is rectangular, and the center part of the upper side is a temperature-sensitive magnetic material 5.
It is cut out so that it can be inscribed on the outer surface of the leg portions 51, 51', and a hole 91 corresponding to the hole 53 is provided in the end surface. Further, on the upright side of the holding frame 9, a mounting piece 92 with mounting holes for fixing it to the device is integrally formed, and a terminal plate 93 for connecting the lead of the reed switch 3 and an electrode of the PTC thermistor 7 are integrally formed. A terminal plate 94 for connecting 8 and 8' is fixed.
第５図は第４図に示された保持枠に第３図に示
された送風検知装置を取り付けた状態を示した正
面図である。図において、１０は孔５３，９１に
挿着したリベツトである。 FIG. 5 is a front view showing the airflow detection device shown in FIG. 3 attached to the holding frame shown in FIG. 4. In the figure, 10 is a rivet inserted into the holes 53 and 91.
以下本考案による送風検知装置の動作を第２図
を参照して説明する。まず、定格風速の送風が図
の紙面と直角の方向から定常的に行なわれている
とする。このとき正特性サーミスタ７及びその周
辺部から熱が強勢的に奪われ、Ｕ字状感温磁性体
５の感熱部の温度がキユリー点未満の温度である
ためＵ字状感温磁性体５が強磁性を呈する。した
がつて、磁石６，６′からの磁束は、磁石６、リ
ードスイツチ３の中央部分、磁石６′及びＵ字状
感温磁性体５の閉磁路を形成し、リードスイツチ
３の中央部分に十分な磁束が流れるので、リード
スイツチ３の接点は閉成状態である。次に、この
状態から風速が定格風速より低下したとする。こ
のとき、Ｕ字状感温磁性体５の感温部は、温度上
昇していき、キユリー温度に到達すると、常磁性
を呈する。したがつて、磁石６，６′からの磁束
は、磁石６及び磁石６′が各々単独で閉磁路を形
成し、リードスイツチ３の中央部分には流れない
ので、リードスイツチ３の接点は開放状態とな
る。 The operation of the air blow detection device according to the present invention will be explained below with reference to FIG. First, it is assumed that air is constantly blown at the rated wind speed from a direction perpendicular to the plane of the drawing. At this time, heat is forcibly taken away from the PTC thermistor 7 and its surrounding area, and since the temperature of the heat-sensitive part of the U-shaped temperature-sensitive magnetic body 5 is below the Curie point, the U-shaped temperature-sensitive magnetic body 5 Exhibits ferromagnetism. Therefore, the magnetic flux from the magnets 6 and 6' forms a closed magnetic path between the magnet 6, the central part of the reed switch 3, the magnet 6', and the U-shaped temperature-sensitive magnetic body 5, and is applied to the central part of the reed switch 3. Since sufficient magnetic flux flows, the contacts of the reed switch 3 are in a closed state. Next, assume that the wind speed drops below the rated wind speed from this state. At this time, the temperature of the temperature-sensitive portion of the U-shaped temperature-sensitive magnetic body 5 increases, and when it reaches the Curie temperature, it becomes paramagnetic. Therefore, the magnetic flux from the magnets 6 and 6' each forms a closed magnetic path independently, and does not flow into the center of the reed switch 3, so the contacts of the reed switch 3 are in an open state. becomes.
第６図は本考案による他の一実施例の構成を示
した正面図である。図において、５０は導電性の
Ｕ字状金属系感温磁性体である。Ｕ字状金属系感
温磁性体５０は、導電性であるので、その感熱部
には正特性サーミスタ７の片側面が密着され、正
特性サーミスタ７の電極の一方の役目を兼ねてい
る。従つて、第２図の実施例のものより熱伝達効
率が良い。動作原理は第２図と同様なので省略す
る。 FIG. 6 is a front view showing the structure of another embodiment of the present invention. In the figure, 50 is a conductive U-shaped metallic temperature-sensitive magnetic material. Since the U-shaped metallic temperature-sensitive magnetic body 50 is electrically conductive, one side of the PTC thermistor 7 is brought into close contact with its heat-sensitive portion, and it also serves as one of the electrodes of the PTC thermistor 7 . Therefore, the heat transfer efficiency is better than that of the embodiment shown in FIG. The operating principle is the same as that shown in FIG. 2, so a description thereof will be omitted.
第７図は本考案によるさらに他の一実施例の構
成を示した正面図である。磁石６，６′間に0.5〜
1.0mm程度のエアギヤツプが設けられた常開型の
温度スイツチとなつている。次に第７図に示され
た実施例の動作について説明する。定格風速の送
風が定常的に行なわれている状態では、正特性サ
ーミスタ７及びその周辺部から熱が強制的に奪わ
れ、Ｕ字状感温磁性体５０の感熱部の温度がキユ
リー温度未満でありＵ字状感温磁性体５０は強磁
性を呈する。したがつて、磁石６，６′からの磁
束の大部分は、Ｕ字状感温磁性体５０を通り、リ
ードスイツチ３には微少しか通らないので、リー
ドスイツチ３の接点は開放状態にある。この状態
から風速が定格風速より低下した場合、熱の奪わ
れる量が低下し、そのためＵ字状感温磁性体５０
の感熱部の温度が上昇してキユリー温度に到達す
ると、Ｕ字状感温磁性体５０の感熱部が常磁性を
呈する。したがつて、磁石６，６′からの磁束は
リードスイツチ３を通り、リードスイツチ３の接
点は閉成状態となる。ここで、磁石６，６′間の
0.5〜1.0mm程度のエアギヤツプは、わずかなもれ
磁束をリードスイツチ３の中央部に流しておくこ
とにより接点の閉成から開放への移行を容易にさ
せる効果がある。 FIG. 7 is a front view showing the configuration of still another embodiment of the present invention. 0.5~ between magnets 6 and 6'
It is a normally open temperature switch with an air gap of approximately 1.0 mm. Next, the operation of the embodiment shown in FIG. 7 will be explained. When air is constantly blown at the rated speed, heat is forcibly removed from the PTC thermistor 7 and its surrounding area, and the temperature of the heat-sensitive part of the U-shaped temperature-sensitive magnetic body 50 is lower than the Curie temperature. The dovetail U-shaped temperature-sensitive magnetic body 50 exhibits ferromagnetism. Therefore, most of the magnetic flux from the magnets 6, 6' passes through the U-shaped temperature-sensitive magnetic body 50, and only a small amount passes through the reed switch 3, so that the contacts of the reed switch 3 are in an open state. When the wind speed decreases from this state below the rated wind speed, the amount of heat removed decreases, and therefore the U-shaped temperature-sensitive magnetic body 50
When the temperature of the heat-sensitive portion of the U-shaped temperature-sensitive magnetic body 50 rises to reach the Curie temperature, the heat-sensitive portion of the U-shaped temperature-sensitive magnetic body 50 exhibits paramagnetism. Therefore, the magnetic flux from the magnets 6, 6' passes through the reed switch 3, and the contacts of the reed switch 3 are closed. Here, between magnets 6 and 6'
An air gap of about 0.5 to 1.0 mm has the effect of allowing a small amount of leakage magnetic flux to flow into the center of the reed switch 3, thereby facilitating the transition from closing to opening of the contact.
本考案に使用される温度スイツチは、Ｕ字状の
感温磁性体の基部すなわち感温部から離してリー
ドスイツチと永久磁石が設けられた構造であれば
よい。そのため本考案による送風検知装置では、
送風の流れを妨げないので送風による熱放散が円
滑に行なわれる。 The temperature switch used in the present invention may have a structure in which a reed switch and a permanent magnet are provided apart from the base of the U-shaped temperature-sensitive magnetic body, that is, the temperature-sensing section. Therefore, in the air blow detection device according to the present invention,
Since the flow of air is not obstructed, heat dissipation by air is carried out smoothly.
本考案では発熱体に正特性サーミスタを使用し
ているため、送風が停止した場合にもある送風が
停止したときに対応する一定の飽和温度に保持さ
れるので安全である。また、正特性サーミスタは
自己温度保持機能を有するので、風速に対応した
一定飽和温度をもち、風速の変化を検出すること
ができる。 Since the present invention uses a positive temperature coefficient thermistor for the heating element, it is safe because even when the air blowing stops, the temperature is maintained at a constant saturation temperature corresponding to when the air blowing stops. Further, since the positive temperature coefficient thermistor has a self-temperature holding function, it has a constant saturation temperature corresponding to the wind speed, and can detect changes in the wind speed.
第８図は本考案の送風検知装置における風速が
変化した場合の時間ｔに対する感温磁性体感熱部
温度Ｔの変化の一特性例を示した図である。図に
おいて、時刻t1以前では定格風速５ｍ／secであ
つて、そのとき感温磁性体の感熱部温度は、風速
５ｍ／secでの正特性サーミスタの一定飽和温度
Taに保持されている。時刻t1で風速が変化して、
その時刻t1以後風速３ｍ／secとなる。そのとき、
感温磁性体の感熱部温度は、次第に上昇してい
き、時刻t2でキユリー温度Tcに達し温度スイツ
チが動作する。この風速低下の時刻t1から温度ス
イツチが動作する時刻t2の間の時間t0が応答時間
である。本考案では熱伝導によつて熱が伝達され
るので、第１図に示した従来のものより応答時間
t0は短い。その後十分時間がたつと、感温磁性体
の感温部温度は、風速３ｍ／secでの正特性サー
ミスタの一定飽和温度TMに保持される。 FIG. 8 is a diagram showing an example of the characteristics of the change in the temperature T of the heat-sensitive part of the temperature-sensitive magnetic body with respect to time t when the wind speed changes in the airflow detection device of the present invention. In the figure, the rated wind speed is 5 m/sec before time t 1 , and the temperature of the heat-sensitive part of the temperature-sensitive magnetic body is the constant saturation temperature of the positive temperature coefficient thermistor at the wind speed of 5 m/sec.
It is held in Ta. At time t 1 , the wind speed changes,
After that time t1, the wind speed becomes 3 m/sec. then,
The temperature of the heat-sensitive part of the temperature-sensitive magnetic material gradually rises and reaches the Curie temperature Tc at time t2 , and the temperature switch is activated. The time t 0 from time t 1 when the wind speed decreases to time t 2 when the temperature switch operates is the response time. In this invention, heat is transferred by thermal conduction, so the response time is longer than that of the conventional one shown in Figure 1.
t 0 is short. After a sufficient period of time has passed, the temperature of the temperature sensing part of the temperature sensitive magnetic body is maintained at a constant saturation temperature T M of the positive temperature coefficient thermistor at a wind speed of 3 m/sec.
以上の説明で明らかなように、正特性サーミス
タの発熱が効率よく感温磁性体の感熱部に伝達さ
れ、かつ送風による熱放散が円滑に行なわれるの
で、感温磁性体のキユリー点を任意に設定してあ
る指定した風速を短い時間で検知することができ
るという効果がある。 As is clear from the above explanation, the heat generated by the PTC thermistor is efficiently transferred to the heat-sensitive part of the temperature-sensitive magnetic material, and the heat is smoothly dissipated by blowing air. This has the effect of being able to detect a specified wind speed in a short period of time.
なお、本考案の要旨を変更しないで種々の設計
変更を施したものも本考案に含まれるのは言うま
でもない。 Note that it goes without saying that the present invention also includes those in which various design changes are made without changing the gist of the present invention.
第１図は従来の送風検知装置の構成を示した正
面図、第２図は本考案の一実施例の構成を示した
正面図、第３図は第２図の実施例において取り付
けを考慮した場合の構成を示した斜視図、第４図
は本考案による送風検知装置用の絶縁性保持枠の
一例を示した斜視図、第５図は第４図に示された
保持枠に第３図に示された送風検知装置を取り付
けた状態を示した正面図、第６図は本考案による
他の一実施例の構成を示した正面図、第７図は本
考案によるさらに他の一実施例の構成を示した正
面図、第８図は本考案の送風検知装置における風
速が変化した場合の時間に対する感温磁性体感熱
部温度の変化の一特性例を示した図である。
記号の説明：１は永久磁石、２は感温磁性体、
３はリードスイツチ、４は発熱体、５はＵ字状フ
エライト系感温磁性体、６，６′は永久磁石、７
は正特性サーミスタ、８，８′は電極、９は絶縁
保持枠、５０はＵ字状金属系感温磁性体、５１，
５１′はＵ字状感温磁性体の脚部、５２はリード
スイツチ貫通用の穴、５３は固定用小貫通孔、８
１，８１′は圧着板、８２，８２′はリベツト、９
１は固定用小貫通孔、９２は取付片、９３，９４
は端子板、１０はリベツトをそれぞれあらわして
いる。
Fig. 1 is a front view showing the configuration of a conventional air blow detection device, Fig. 2 is a front view showing the structure of an embodiment of the present invention, and Fig. 3 is a front view showing the structure of an embodiment of the present invention. FIG. 4 is a perspective view showing an example of an insulating holding frame for an airflow detection device according to the present invention, and FIG. 5 is a perspective view showing an example of the structure of the present invention. FIG. 6 is a front view showing the configuration of another embodiment of the present invention, and FIG. 7 is still another embodiment of the present invention. FIG. 8 is a front view showing the configuration of the present invention, and FIG. 8 is a diagram showing an example of the characteristics of the change in the temperature of the heat-sensitive part of the temperature-sensitive magnetic body with respect to time when the wind speed changes in the air blowing detection device of the present invention. Explanation of symbols: 1 is a permanent magnet, 2 is a temperature-sensitive magnetic material,
3 is a reed switch, 4 is a heating element, 5 is a U-shaped ferrite temperature-sensitive magnetic material, 6 and 6' are permanent magnets, 7
8 and 8' are positive temperature coefficient thermistors, 8 and 8' are electrodes, 9 is an insulating holding frame, 50 is a U-shaped metal temperature-sensitive magnetic material, 51,
51' is the leg of the U-shaped temperature-sensitive magnetic material, 52 is a hole for passing through the reed switch, 53 is a small through hole for fixing, 8
1, 81' are crimp plates, 82, 82' are rivets, 9
1 is a small through hole for fixing, 92 is a mounting piece, 93, 94
10 represents a terminal board, and 10 represents a rivet.
Claims (1)
脚部側に前記Ｕ字状の感温磁性体の基部から離し
て設けられたリードスイツチと該リードスイツチ
の近傍に前記Ｕ字状の感温磁性体の基部から離れ
た前記Ｕ字状の感温磁性体の脚部に接して設けら
れた永久磁石とからなる温度スイツチと、前記Ｕ
字状の感温磁性体の基部に熱を伝導によつて伝え
る正特性サーミスタとを有する送風検知装置。 A U-shaped temperature-sensitive magnetic body, a reed switch provided on the leg side of the U-shaped temperature-sensitive magnetic body away from the base of the U-shaped temperature-sensitive magnetic body, and a reed switch provided near the reed switch. a temperature switch consisting of a permanent magnet provided in contact with a leg of the U-shaped temperature-sensitive magnetic body remote from the base of the U-shaped temperature-sensitive magnetic body;
A blowing air detection device having a positive temperature coefficient thermistor that transmits heat by conduction to the base of a letter-shaped temperature-sensitive magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11808382U JPS5923667U (en) | 1982-08-03 | 1982-08-03 | Air blow detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11808382U JPS5923667U (en) | 1982-08-03 | 1982-08-03 | Air blow detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5923667U JPS5923667U (en) | 1984-02-14 |
| JPH0116050Y2 true JPH0116050Y2 (en) | 1989-05-12 |
Family
ID=30271561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11808382U Granted JPS5923667U (en) | 1982-08-03 | 1982-08-03 | Air blow detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5923667U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5415432A (en) * | 1977-07-06 | 1979-02-05 | Nisshin Steel Co Ltd | Zinc plated steel plate and cans made by using same |
| JPS5625222B2 (en) * | 1976-08-20 | 1981-06-11 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625222U (en) * | 1979-08-03 | 1981-03-07 |
-
1982
- 1982-08-03 JP JP11808382U patent/JPS5923667U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625222B2 (en) * | 1976-08-20 | 1981-06-11 | ||
| JPS5415432A (en) * | 1977-07-06 | 1979-02-05 | Nisshin Steel Co Ltd | Zinc plated steel plate and cans made by using same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5923667U (en) | 1984-02-14 |
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