JPH0372319U

JPH0372319U -

Info

Publication number: JPH0372319U
Application number: JP13428089U
Authority: JP
Priority date: 1989-11-18
Filing date: 1989-11-18
Publication date: 1991-07-22

Description

[Brief explanation of drawings]

第１図および第２図は本考案の実施例を示し、
第１図は温度補償抵抗および湿度センサをターミ
ナルに組付けた状態を示す一部破断の斜視図、第
２図は基板の裏面側に設けた湿度センサ等を示す
斜視図、第３図ないし第６図は従来技術を示し、
第３図は熱線式流量計を設けた吸気管の縦断面図
、第４図は第３図中の矢示−方向拡大断面図
、第５図は温度補償抵抗の組付け状態を示す一部
破断の斜視図、第６図は熱線式流量計の電気回路
図である。１……吸気管、３……インテークパイプ、４…
…検出通路、５……感熱素子（熱線抵抗）、１２
……流量調整抵抗、１３……基準抵抗、２１，２
２……ターミナル、２１Ａ……挟持部、２２Ａ…
…接続部、２３……温度補償抵抗、２４……基板
、２５……白金薄膜（白金抵抗）、２６，２９…
…電極、２７……湿度センサ（湿度検出器）、２
８……感湿膜。 1 and 2 show an embodiment of the present invention,
Fig. 1 is a partially cutaway perspective view showing the temperature compensation resistor and humidity sensor assembled to the terminal, Fig. 2 is a perspective view showing the humidity sensor etc. installed on the back side of the board, and Figs. Figure 6 shows the prior art,
Figure 3 is a longitudinal sectional view of the intake pipe equipped with a hot wire flowmeter, Figure 4 is an enlarged sectional view in the direction of the arrow in Figure 3, and Figure 5 is a part showing the assembled state of the temperature compensation resistor. FIG. 6, which is a perspective view of a broken portion, is an electrical circuit diagram of the hot wire flowmeter. 1...Intake pipe, 3...Intake pipe, 4...
...Detection path, 5...Heat-sensitive element (heat wire resistance), 12
...Flow rate adjustment resistance, 13...Reference resistance, 21,2
2... Terminal, 21A... Clamping part, 22A...
... Connection part, 23 ... Temperature compensation resistor, 24 ... Substrate, 25 ... Platinum thin film (platinum resistance), 26, 29 ...
... Electrode, 27 ... Humidity sensor (humidity detector), 2
8...Moisture sensitive membrane.

Claims

[Scope of utility model registration request]

a hot wire resistance disposed in the middle of the intake pipe and cooled by the intake air flowing through the intake pipe; and a hot wire resistance disposed in the intake pipe so as to be in contact with the intake air;
A hot-wire flowmeter comprising a temperature-compensating resistor that compensates for temperature changes in the intake air, and a flow rate adjusting resistor and a reference resistor that are arranged outside the intake pipe and constitute a bridge circuit together with the temperature-compensating resistor and the hot-wire resistor. In the above, the temperature compensation resistor is formed by depositing a platinum resistor on the surface of a substrate made of a ceramic material, and a film of moisture-sensitive element material is deposited on the back surface of the substrate, so that the intake air is A heat-sensing flowmeter characterized by forming a humidity detector that detects humidity.