CN103376179A - Pressure sensor - Google Patents
Pressure sensor Download PDFInfo
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- CN103376179A CN103376179A CN2012101063738A CN201210106373A CN103376179A CN 103376179 A CN103376179 A CN 103376179A CN 2012101063738 A CN2012101063738 A CN 2012101063738A CN 201210106373 A CN201210106373 A CN 201210106373A CN 103376179 A CN103376179 A CN 103376179A
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- pressure transducer
- step section
- way valve
- chamber
- valve mechanism
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Abstract
The invention relates to the refrigeration technical field, and specifically relates to a pressure sensor. The pressure sensor comprises: a body (1) which contains a medium introducing port (16) and an inner cavity (11), a signal induction component (3) which is arranged between the medium introducing port (16) and the inner cavity (11) and seals the inner cavity (11), and a circuit board (2) which is arranged inside the inner cavity (11) and is provided with a leading wire (6). The signal induction component (3) converts medium pressure changes of the medium introducing port (16) into electrical signals and the electrical signals are output through the leading wire (6). The pressure sensor is characterized in that: the body (1) is further provided with a one-way valve mechanism (5) which is capable of releasing pressure inside the inner cavity (11). Through arrangement of the one-way valve mechanism on the body, the pressure sensor can discharge high pressure accumulated in the inner cavity, and meanwhile, external water and gases can be prevented from entering the inner cavity; and the pressure sensor is simple in structure and reliable in performance.
Description
Technical field
The present invention relates to refrigeration technology field, be specifically related to a kind of pressure transducer.
Background technology
Pressure transducer is important element in the automatically control, and its effect is that the pressure signal with fluid is transformed into specific electric signal by certain method, and this electric signal is as the automatic input signal of control, finally realizes automatically control under the processing of control program.
Figure is that the pressure transducer of prior art is dissected synoptic diagram, see also Fig. 1,
Pressure transducer comprises roughly tubular base 100, offers through hole as medium intake 101 in the bottom of tubular, and plastic casing 800 is fixedly connected with base 100, forms chamber 102, and gland bonnet 400 places the top of chamber 102.Induction of signal parts 300 are arranged between chamber 102 and the medium intake 101, and by seal 700 that chamber 102 is airtight.Wiring board 200 is placed in the chamber 102, and the hole that contact pin 600 passes plastic casing 800 is connected on the wiring board 200, and connector 900 is fixedly connected with plastic casing 800,
Induction of signal parts 300 change the pressure medium in the medium intake 101, convert electric signal to, after arrangement is amplified to signal by the circuit on the wiring board 200, are drawn by connector 900 by contact pin 600.
The pressure sensor structure of prior art, induction of signal parts 300 are by seal 700 sealed chamber 102, in the process of working long hours, little leakage of seal 700 is accumulated in time, can in chamber 102, progressively form certain high pressure, this pressure can act on the pressure sensitive position on the highstrung induction of signal parts 300, cause the distortion of pressure sensitive position and the output of pressure core body is changed, cause whole output of products unstable, cause properties of product unstable, cause system's control maloperation when serious.
In view of this, demand the design that improves for existing pressure transducer urgently, can not be subject to the interference that pressure raises in the inner chamber effectively to avoid its pressure sensitive position, guarantee that the output of products performance is more precisely reliable.
Summary of the invention
For defects, the technical matters that the present invention solves is to provide a kind of pressure transducer, can effectively avoid its pressure sensitive position can not be subject to the interference that chamber pressure raises.
Pressure transducer of the present invention, comprise the body with medium intake and inner chamber, the induction of signal parts of isolating described medium intake and inner chamber, and place wiring board in the described chamber, described induction of signal parts convert the variation of the pressure medium in the medium intake to electric signal, and by being connected to the lead-in wire output on the described wiring board, it is characterized in that, also be provided with the one-way valve mechanism that can discharge described cavity indoor pressure on the described body.
Further, such as the pressure transducer of above-mentioned structure, also be provided with the first encapsulation cavity of the Embedding Material of the described lead-in wire of parcel on the described body;
Further, such as the pressure transducer of above-mentioned structure, also comprise the protection lid that the elastomeric material of isolating described the first encapsulation cavity is made, described protection lid is provided with the discharging micropore in the corresponding position of the outlet of described one-way valve mechanism;
Preferably, the lower bottom base specifically made by metal material of described body is fixedly connected with the upper bed-plate of being made by plastic material and consists of;
Preferably, described one-way valve mechanism specifically comprises spool, valve seat and base, described base supports described spool to described valve seat by flexible member, described body is provided with the accommodation hole of described one-way valve mechanism, described accommodation hole is near the direction of described chamber, be provided with first step section, described spool places in the described first step section;
Further, the direction of the endpiece of described accommodation hole also is provided with second step section, and the external diameter of described second step section is greater than the external diameter of described first step section, and described base places in the described second step section;
Preferably, described one-way valve mechanism specifically comprises tubular shell and places described tubular shell interior spool, valve seat and base, described base supports described spool to described valve seat by flexible member, be provided with the accommodation hole that holds described one-way valve mechanism on the described body, described tubular shell places described accommodation hole;
Further, described accommodation hole is provided with first step section, in the described first step of the described tubular shell butt section near the direction of described chamber;
Further, the peripheral part of affiliated tubular shell is by arranging recess to form the second encapsulation cavity, and described the first encapsulation cavity is connected with the second encapsulation cavity.
Pressure transducer of the present invention has carried out Optimal Structure Designing based on prior art, by at body one-way valve mechanism being set, the high pressure that accumulates in the inner chamber can be discharged, and also can stop outside aqueous vapor to enter inner chamber simultaneously, and performance simple in structure is reliable.
In the present invention; at the protection lid discharging micropore is set; it has ventilative but fluid-tight ability; form path with above-mentioned one-way valve structures; consist of double shielding, reach waterproof and dampproof purpose, the further effect of the present invention is; lead-in wire and embedding sealant junction are played a protective role, prevent lead-in wire in use because bending causes its fracture.
Description of drawings
Fig. 1: the one-piece construction synoptic diagram of the typical pressure transducer of prior art;
Fig. 2: the present invention provides the one-piece construction synoptic diagram of preferred pressure transducer;
Fig. 3: the present invention provides the one-piece construction synoptic diagram of another kind of preferred pressure transducer;
Fig. 4: the one-way valve mechanism structural representation among Fig. 3.
Symbol description among the figure:
1-body, 1A-lower bottom base, 1B-upper bed-plate;
11-chamber, 12-the first encapsulation cavity, 13-accommodation hole;
14, first step section, 15-second step section;
16-medium intake, 17-the second encapsulation cavity;
The 2-wiring board;
3-induction of signal parts;
4-protection lid, 41-discharge micropore;
The 5-one-way valve mechanism;
51-spool, 52-valve seat;
53-base, 531-hole;
54-flexible member, 55-tubular shell;
The 6-lead-in wire;
The 7-seal;
The 8-encapsulant;
The 100-base;
101-medium intake, 102-chamber;
The 200-wiring board;
300-induction of signal parts;
The 400-gland bonnet;
The 600-contact pin;
The 700-seal;
The 800-plastic casing,
The 800-plastic casing;
The 900-connector.
Embodiment
Core of the present invention provides a kind of pressure transducer, by Optimal Structure Designing to avoid its pressure sensitive position to be subject to the impact of inner chamber high pressure.
Specify present embodiment below in conjunction with Figure of description.
Fig. 2 is the one-piece construction synoptic diagram that the present invention provides preferred pressure transducer.
As shown in Figure 2.Pressure transducer comprises the roughly tubular lower bottom base 1A that is made by metal material and the upper bed-plate 1B that is made by plastic material, and lower bottom base 1A upper bed-plate 1B is fixedly connected with the body 1 that consists of pressure transducer relatively, and forms chamber 11.Offer through hole as medium intake 16 in its bottom, induction of signal parts 3 are fixed on the bottom of the chamber 11 of lower bottom base 1A, between induction of signal parts 3 and lower bottom base 1A bottom, be provided with seal 7, with chamber 11 and 16 isolation of medium intake, make chamber 11 form relatively airtight chamber like this.Upper bed-plate 1B is provided with the first encapsulation cavity 12.
When the pressure medium in the medium intake 16 changes, its pressure-acting is on induction of signal parts 3, make pressure sensitive position wherein produce distortion, thereby the electric bridge that is etched in the pressure sensitive position produces the electric signal of response, processed again the electric signal of the standard of being converted into by the amplifying circuit on the wiring board 2, and by being connected to lead-in wire 6 outputs on the described wiring board 2.
Also be provided with accommodation hole 13 at upper bed-plate 1B, be provided with first step section 14 at accommodation hole 13 near the direction of chambers 11; Direction at the endpiece of accommodation hole 13 is provided with second step section 15, and the external diameter of second step section 15 is greater than the external diameter of described first step section 14, and this structure is convenient to machine-shaping.Be arranged on accommodation hole 13 internal check valve mechanisms 5, specifically comprise spool 51, valve seat 52 and base 53.Spool 51 is arranged in the first step section 14, and base 53 places in the described second step section 15.Base 53 supports spool 51 to valve seat 52 by flexible member 54.
In the present embodiment, spool 51 is specially steel ball structure, steel ball size little with accommodation hole 13 at the diameter of its relevant position, and passage 531 is set on the base 53, passage 531 positions of the base 53 on protection lid 4 offer discharging micropore 41.
When the chamber 11 inner accumulated pressure of body 1 are elevated to certain value, chamber 11 internal pressures promotion spool 51 overcomes the elastic force of flexible member 54 and lifts off a seat 52, medium can pass through accommodation hole 13 admission passages 531, and discharging micropore 41 is subject to the pressure-acting of medium and opens, and draws off high-pressure medium; And when the pressure of the chamber 11 of body 1 recovers to reduce, being subject to the elastic force of flexible member 54, spool 51 can not opened.And close at the metamorphosis that the discharging micropore that protection lid 4 arranges is subject to elastomeric material; so have ventilative but fluid-tight ability; form path with one-way valve structures and consist of double shielding; reach waterproof and dampproof purpose; protection lid 4 also plays a protective role to lead-in wire and embedding encapsulant junction simultaneously, prevents lead-in wire in use because bending causes its fracture.
In the present embodiment, as preferred version, be provided with second step section 15 in the direction of the endpiece of accommodation hole 13, base 53 places in the described second step section 15.
Fig. 3 is the one-piece construction synoptic diagram that the present invention provides another kind of preferred pressure transducer, and Fig. 4 is the one-way valve mechanism structural representation among Fig. 3.
As shown in Figure 3 and Figure 4.Different from such scheme is, is provided with accommodation hole 13 at upper bed-plate 1B, is provided with first step section 14 at accommodation hole 13 near the direction of chambers 11.One-way valve mechanism 5 specifically comprises tubular shell 55, and tubular shell 55 is connected in the first step section 14, and matches with accommodation hole 13 by peripheral part.By the method for circumferential cutting, valve seat 52 and base 53 are fixed on the two ends of tubular shell 55 endoporus, and base 53 supports spool 51 to described valve seat 52 by flexible member 54.The peripheral part of tubular shell 55 also arranges recess by extruding, and forming the second encapsulation cavity (17), the first encapsulation cavity (12) and the second encapsulation cavity 17 are connected by aperture.The usefulness of such structure is, in will go between to the first encapsulation cavity 12 interior perfusion encapsulants 86 parcels and airtight chamber 11, also tubular shell 55 is fixed in the accommodation hole 13.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. pressure transducer, comprise the body (1) with medium intake (16) and inner chamber (11), place between described medium intake (16) and the inner chamber (11) and the induction of signal parts (3) of airtight described inner chamber (11), place the wiring board with leaded (6) (2) in the described chamber (11), described induction of signal parts (3) convert the pressure medium variation of described medium intake (16) electric signal to and pass through described lead-in wire (6) output, it is characterized in that, also be provided with the one-way valve mechanism (5) that can discharge described chamber (11) internal pressure on the described body (1).
2. pressure transducer according to claim 1 is characterized in that, also is provided with first encapsulation cavity (12) of the Embedding Material of the described lead-in wire of parcel (6) on the described body (1).
3. pressure transducer according to claim 2; it is characterized in that; the protection lid (4) made of elastomeric material that also comprises described the first encapsulation cavity of isolation (12), described protection lid (4) are provided with discharging micropore (41) in the corresponding position of outlet of described one-way valve mechanism (5).
4. pressure transducer according to claim 1 is characterized in that, described body (1) lower bottom base (1A) of specifically being made by metal material and the upper bed-plate of being made by plastic material (1B) are fixedly connected with formation.
5. described pressure transducer according to claim 1-4, it is characterized in that, described one-way valve mechanism (5) specifically comprises spool (51), valve seat (52) and base (53), described base (53) supports described spool (51) to described valve seat (52) by flexible member (54), described body (1) is provided with the accommodation hole (13) of described one-way valve mechanism (5), described accommodation hole (13) is near the direction of described chamber (11), be provided with first step section (14), described spool (51) places in the described first step section (14).
6. pressure transducer according to claim 5, it is characterized in that, the direction of the endpiece of described accommodation hole (13) also is provided with second step section (15), the external diameter of described second step section (15) is greater than the external diameter of described first step section (14), and described base (53) places in the described second step section (15).
7. described pressure transducer according to claim 1-4, it is characterized in that, described one-way valve mechanism (5) specifically comprises tubular shell (55) and places the interior spool (51) of described tubular shell (55), valve seat (52) and base (53), described base (53) supports described spool (51) to described valve seat (52) by flexible member (54), be provided with the accommodation hole (13) that holds described one-way valve mechanism (5) on the described body (1), described tubular shell (55) places described accommodation hole (13).
8. pressure transducer according to claim 7, it is characterized in that, described accommodation hole (13) is provided with first step section (14), in described tubular shell (55) the butt described first step section (14) near the direction of described chamber (11).
9. pressure transducer according to claim 7, it is characterized in that, the peripheral part of affiliated tubular shell (55) is by arranging recess to form the second encapsulation cavity (17), and described the first encapsulation cavity (12) is connected with the second encapsulation cavity (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210106373.8A CN103376179B (en) | 2012-04-12 | 2012-04-12 | A kind of pressure transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210106373.8A CN103376179B (en) | 2012-04-12 | 2012-04-12 | A kind of pressure transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103376179A true CN103376179A (en) | 2013-10-30 |
| CN103376179B CN103376179B (en) | 2016-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210106373.8A Expired - Fee Related CN103376179B (en) | 2012-04-12 | 2012-04-12 | A kind of pressure transducer |
Country Status (1)
| Country | Link |
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| CN (1) | CN103376179B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614116A (en) * | 2015-02-12 | 2015-05-13 | 威海海泰电子有限公司 | Pressure sensor for marine diesel engine |
| CN105571564A (en) * | 2015-12-11 | 2016-05-11 | 北京天地玛珂电液控制系统有限公司 | Height measuring sensor and hydraulic support using same |
| CN106151646A (en) * | 2015-04-13 | 2016-11-23 | 浙江三花股份有限公司 | Explosion-proof coil, electric expansion valve and the processing method of explosion-proof coil |
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|---|---|---|---|---|
| JPS6222040A (en) * | 1985-07-22 | 1987-01-30 | Fujikura Ltd | Semiconductor pressure sensor |
| CN2094042U (en) * | 1991-07-13 | 1992-01-22 | 朴顺姬 | Folding level pressure measuring sensor |
| CN2280899Y (en) * | 1996-08-15 | 1998-05-06 | 黄德珠 | Pressure sensor with automatic gas-complementing and gas-discharging device |
| CN2433624Y (en) * | 2000-07-17 | 2001-06-06 | 山东省硅酸盐研究设计院 | Ceramic pressure sensor and differential pressure pick-up |
| CN2650097Y (en) * | 2003-05-07 | 2004-10-20 | 骆振平 | Engine oil pressure sensor |
| CN1614374A (en) * | 2003-11-07 | 2005-05-11 | 株式会社不二工机 | Pressure sensor |
| CN102008227A (en) * | 2010-09-15 | 2011-04-13 | 乔林友 | Pressure sensor for heating container |
| CN102023066A (en) * | 2010-05-31 | 2011-04-20 | 昆山双桥传感器测控技术有限公司 | Universal pressure sensor of automobile |
| CN102374920A (en) * | 2010-08-13 | 2012-03-14 | 浙江三花股份有限公司 | Heat exchange device and pressure transducer thereof |
-
2012
- 2012-04-12 CN CN201210106373.8A patent/CN103376179B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6222040A (en) * | 1985-07-22 | 1987-01-30 | Fujikura Ltd | Semiconductor pressure sensor |
| CN2094042U (en) * | 1991-07-13 | 1992-01-22 | 朴顺姬 | Folding level pressure measuring sensor |
| CN2280899Y (en) * | 1996-08-15 | 1998-05-06 | 黄德珠 | Pressure sensor with automatic gas-complementing and gas-discharging device |
| CN2433624Y (en) * | 2000-07-17 | 2001-06-06 | 山东省硅酸盐研究设计院 | Ceramic pressure sensor and differential pressure pick-up |
| CN2650097Y (en) * | 2003-05-07 | 2004-10-20 | 骆振平 | Engine oil pressure sensor |
| CN1614374A (en) * | 2003-11-07 | 2005-05-11 | 株式会社不二工机 | Pressure sensor |
| CN102023066A (en) * | 2010-05-31 | 2011-04-20 | 昆山双桥传感器测控技术有限公司 | Universal pressure sensor of automobile |
| CN102374920A (en) * | 2010-08-13 | 2012-03-14 | 浙江三花股份有限公司 | Heat exchange device and pressure transducer thereof |
| CN102008227A (en) * | 2010-09-15 | 2011-04-13 | 乔林友 | Pressure sensor for heating container |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614116A (en) * | 2015-02-12 | 2015-05-13 | 威海海泰电子有限公司 | Pressure sensor for marine diesel engine |
| CN106151646A (en) * | 2015-04-13 | 2016-11-23 | 浙江三花股份有限公司 | Explosion-proof coil, electric expansion valve and the processing method of explosion-proof coil |
| CN105571564A (en) * | 2015-12-11 | 2016-05-11 | 北京天地玛珂电液控制系统有限公司 | Height measuring sensor and hydraulic support using same |
| CN105571564B (en) * | 2015-12-11 | 2018-05-29 | 北京天地玛珂电液控制系统有限公司 | A kind of elevation carrection sensor and the hydraulic support using elevation carrection sensor |
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| Publication number | Publication date |
|---|---|
| CN103376179B (en) | 2016-08-10 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Effective date of registration: 20170224 Address after: 312500 Zhejiang city of Shaoxing province Xinchang County Chengguan town of Liquan Patentee after: Sanhua Refrigeration Group Co., Ltd., Zhejang Address before: 312500 Xinchang, Zhejiang province Qixing street under the village of Liquan Patentee before: Zhejiang Sanhua Group Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 Termination date: 20190412 |