CN200968892Y

CN200968892Y - Electric inductance hydraulic sensor dedicated for electrical home appliances, boiler

Info

Publication number: CN200968892Y
Application number: CN 200620003152
Authority: CN
Inventors: M·法拉诺; C·内格罗; S·宾多茨
Original assignee: Elbi International SpA
Current assignee: Elbi International SpA
Priority date: 2005-02-18
Filing date: 2006-02-17
Publication date: 2007-10-31
Anticipated expiration: 2016-02-17
Also published as: FR2882434A3; ITTO20050027U1; GB2423371B; DE202006002561U1; GB0602221D0; FR2882434B3; GB2423371A

Abstract

The present invention relates to a pressure sensor. The pressure sensor includes a substrate assembly. The substrate assembly defines sealed channels and includes a conductive layer. A conductive membrane extends from the substrate assembly and is spaced from the conductive layer to form a sealed reference chamber. A cap defines apertures. The cap extends from the substrate assembly to cover the membrane and thereby form an apertured chamber.

Description

Be used in particular for the inductance hydraulic pressure transducer of electric domestic appliance, boiler

Technical field

The utility model relates to a kind of inductive pressure transducer.

The utility model content

More particularly, the purpose of this utility model provides a kind of inductance hydraulic pressure transducer that is used for electric domestic appliance, boiler and analog especially, and the sensor of the type comprises:

Stiff case, this stiff case has the input that at least one (first) is used for hydraulic pressure that will be detected, and qualification chamber, wherein the mode of not leaking with hydraulic pressure is installed movably barrier film, this barrier film has the surface that operationally is exposed to from the hydraulic pressure of this input, ferromagnetic core is connected to this barrier film, and the action of antagonism (first) elastic biasing means is movably with respect to the fixed coil by this housing carrying under the effect of this pressure by this way, makes that the inductance of this coil changes according to this hydraulic pressure value in operation.

The purpose of this utility model is to provide a kind of inductive pressure transducer of the type that limits above, and it is isolated for the electric component that makes water and this sensor, and the structure of this sensor and assembly are simplified and had improved feature.

According to the utility model, the inductive pressure transducer of the type by top appointment can be realized the purpose of these and other it is characterized in that this housing comprises:

First cup shaped body haply, this cup shaped body has the tubular handle that wherein limits this input and has the opening that is positioned at this tubular handle end opposite, and

The second tubular drum main body, this tubular drum main body is fixed in this first main body, and has:

First end, the mode that this first end does not leak with hydraulic pressure clamps the periphery of this barrier film,

Axial pars intermedia, coil centers on its winding, and

The second end, this second end limits reaction surface, with this movably related this elastic device of core work against it, it is movably that this layout makes core be installed as between this barrier film and this elastic biasing means in the inside of this second main body.

As mentioned above, the present invention relates to a kind of inductance hydraulic pressure transducer, be used for electric domestic appliance, boiler, this inductance hydraulic pressure transducer comprises: stiff case, this stiff case has the input connector that at least one (first) is used for hydraulic pressure that will be detected, and qualification chamber, wherein the mode of not leaking with hydraulic pressure is installed movably barrier film, this barrier film has the surface that operationally is exposed to from the hydraulic pressure of this input connector, ferromagnetic core is connected to barrier film, and the action of antagonism elastic biasing means is movably with respect to the fixed coil by this housing carrying under the effect of this pressure by this way, the inductance of feasible this coil in operation changes according to the value of this hydraulic pressure, this housing comprises first cup shaped body, this cup shaped body has the tubular handle that wherein limits this input connector, and has the opening that is positioned at this tubular handle end opposite, and the second tubular drum main body, this tubular drum main body is fixed in this first main body, and have: first end, the mode that this first end does not leak with hydraulic pressure clamps the periphery of this barrier film, axial pars intermedia, twine this coil around it, and the second end, this the second end limits reaction surface, with this movably related this elastic device of core work against this reaction surface, it is movably that this layout makes core be installed as between this barrier film and this elastic biasing means in the inside of this second main body.

Description of drawings

By the detailed description that only provides with unrestricted embodiment with reference to the accompanying drawings, the further feature and advantage of the utility model will become apparent, wherein:

Accompanying drawing 1 is the front elevation according to first inductive pressure transducer of the present utility model,

Accompanying drawing 2 is decomposition diagrams of the inductive pressure transducer of expression accompanying drawing 1,

Accompanying drawing 3 is the sectional views along the line III-III of accompanying drawing 1,

Accompanying drawing 4 is the sectional views along the line IV-IV of accompanying drawing 3,

Accompanying drawing 5 is the side views that are included in according to the drum main body in the sensor of aforementioned figures,

Accompanying drawing 6 is the sectional views along the line VI-VI of accompanying drawing 3,

Accompanying

drawing

7 and 8 is the sectional views that are similar to accompanying drawing 4, and has represented two distortion according to sensor of the present utility model, and

Accompanying drawing 9 is expression sectional views according to the further distortion of equipment of the present utility model.

Embodiment

Usually will be expressed as 1 in the accompanying drawings according to inductance hydraulic pressure transducer of the present utility model.

Sensor 1 comprises stiff case, is typically expressed as 2, this stiff case by first haply the tubular haply drum main body 4 of cup shaped body 3 and second form.

Cup shaped body 3 has tubular handle 3a down, wherein is defined for the input connector of the hydraulic pressure of wanting detected or manages 5 (accompanying drawings 3 and 4).

In using the embodiment that represents for example, cup shaped body 3 contiguous tubular handle 3a have the 3b of first of the diameter that has amplification, are the center section 3c with diameter of further amplification then, and are the upper end 3d with the diameter that further amplifies at last.

Tubular drum main body 4 has bottom 4a, and its end edge clamps the periphery 6a of barrier film in the mode of not leaking with respect to cup shaped body 3 hydraulic pressure, and this barrier film is typically expressed as 6.This barrier film 6 has surperficial 6b, and this surface operationally is exposed to from input connector or manages 5 hydraulic pressure (accompanying drawing 3 and 4).

Drum main body 4 has axial center section 4b, this axial center section has outer annular flange 7, this outer annular flange (preferably) is facing barrier film 6, just clamps lip ring 18 with respect to cup shaped body 3 on the side of input connector 5.

Drum main body 4 has the second end 4c that has terminal part 4d, the upper opening 3e of its sealing cup shaped body 3, and define second outer annular flange 8 that is parallel to flange 7 haply.

Coil 9 center section 4b around drum main body 4 between

flange

7 and 8 twines.

Connect outshot 10 (accompanying drawing 3 and 4) by buckle drum main body 4 is fixed to cup shaped body 3, this buckle connects outshot and forms in the lower shaft part 4a of main body 4, and engages in the respective openings or seat 11 among the part 3b that is arranged on cup shaped body 3.

The chamber is typically expressed as 12, and this chamber is limited in the stiff case of sensor between the end of the upper end of the handle 3a of cup shaped body and drum main body 4 and

center section

4a and 4b inside.Mobile ferromagnetic core 13 extends in this chamber, and is connected to barrier film 6.In using the embodiment that represents for example, core 13 comprises the ring 14 of the ferromagnetic material in the housing 15 that is encapsulated in electrically insulating material such as moulding of plastics materials fully.

Volute spring 16 is in the upper end of its lower end breasting core 13, and breasting in the top is limited to the reaction surface 4e among the upper end 4c of drum main body 4.

In operation, core 13 is movably putting on input connector or managing under 5 the pressure effect with respect to fixed coil 9, so that the inductance of coil 9 changes according to this pressure.

This coil is connected in a not shown manner to treatment circuit, this treatment circuit for example comprises capacitor, the electric capacity of this capacitor forms lc circuit with the inductance of coil 9, and this lc circuit is according to the inductance of coil 9 and therefore according to the frequency resonance in the changeable pressureization of the input connector 5 of sensor.

Treatment circuit advantageously can pass through printed circuit board (PCB) 30 (accompanying drawing 2-6) carrying, and in an illustrated embodiment, this printed circuit board (PCB) is (accompanying drawing 2) of U-shaped haply, and is assemblied between the top 4d and flange 8 of main body 4, around its part 4c.The end 30a carrying conduction of plate 30 connects track, and is connected to connector 31 (accompanying drawing 2 and 3), and this connector " folder " is between drum main body 4 and cup shaped body 3.

Have many advantages according to sensor of the present utility model as mentioned above.

At first, its bearing structure or housing 2 are made of two independent main bodys, just, cup shaped body 3 and drum main body 4, they easily are assembled together.

Further favourable feature shows as coil 9 and the two electricity isolation of the hydraulic fluid (water) that is fed to input connector 5.This pair isolates the periphery 6a that passes through barrier film 6 on the one hand and guarantees that this barrier film is clamped between

main body

3 and 4 in the mode of not leaking, and guarantees by the lip ring between the flange 7 that is clamped in main body 3 and drum main body 4 18.

Further protection shows as the encapsulation fully of ferromagnetic core 4 in electrical isolation housing 15.

Accompanying drawing 7 expressions are according to pressure transducer of the present utility model, and it is compared with the described embodiment of reference accompanying drawing 1-6 has some improvement.

In accompanying drawing 7, the parts of having described use and top identical Reference numeral with element.

First is not both in 7 equipment with reference to the accompanying drawings: have second input connector 19 in the 4c of the upper end of drum main body 4, can second pressure be entered be positioned at part away from the chamber 12 on the side of the barrier film 6 of first input connector 5 by this second input connector.

Because this feature, the sensor device of accompanying drawing 7 is different type, and in operation, core 13 depends on the pressure differential that is applied between

input connector

5 and 19 with respect to the axial location of coil 9.Therefore, the inductance of coil 9 also depends on this pressure differential.

Second different manifestations of the equipment of accompanying drawing 7 is for increasing the volute spring 17 that also has, and this volute spring works against the shoulder among the tubular handle 3a that is arranged on cup shaped body 3 in its lower end, and works against barrier film 6 in the top.

Spring 17 acts on barrier film 6 and related core 13 on the opposite direction of the power that applies with spring 16.

The increase of spring 17 needn't be limited to the realization of the pressure sensor apparatus of differential form in the accompanying drawing, and this is because this spring also can add in the sensor that is formed by the input of single pressure as accompanying drawing 1-6 alternatively.

Accompanying drawing 8 expressions are according to the distortion that also has of pressure transducer of the present utility model.The parts of having described use identical Reference numeral with element in this accompanying drawing.

8 sensor is used for the family expenses heating boiler especially with reference to the accompanying drawings, for example the wall boiler.When with this boiler erection when being used for the construction site of apartment or analog, setter need know at the sensor supply of electrical energy, and can provide before its signal, whether has the fluid under the pressure in the input connector 5 of this pressure transducer.In order to make input connector 5 that setter knows pressure transducer in these cases whether under pressure, in the distortion of accompanying drawing 8, input connector 5 20 is communicated with pipe, and this pipe is at least in part in the extension of housing 2 outsides of sensor, and partially transparent at least preferably.It is movably that main body such as little for example red ball 21 is installed as in pipe 20, and when hydraulic pressure puts on input connector 5, can adopt a position (shown in solid line in the accompanying drawing 8), this position is visible from the outside, and the existence of pressure in the indication input connector 5.

If the absence of pressure in the input connector 5, main body 21 are owing to gravity descends, and be arranged in rest position shown in the dotted line in the accompanying drawing 8, rest on and be arranged on stopping on the element in the pipe 20.

Above-mentioned distortion with reference to accompanying drawing 8 also can selectively realize in the differential pick-up of the type shown in the accompanying drawing 7, is with or without additional springs 17.

In the distortion shown in the accompanying drawing 9, parts of having described or element use identical Reference numeral.

This distortion below aspect haply is different from the distortion of front.

Cup shaped body 3 still has step-like profile, but has more a spot of axial region; Do not have to be expressed as in accompanying

drawing

3 and 7 part of 3d, and part 3c is longer, the top of this part limits the opening 3e of main body 3.Opening 3e is not the top sealing by drum main body 4, but by 50 sealings of independent lid, and this lid connects the top that buckle for example is connected to main body 3.

In 9 distortion with reference to the accompanying drawings, the middle part of diaphragm main body 6 is thickening widely.Distortion as shown in Figure 7 advantageously is arranged in spring 17 between the bottom 3a of diaphragm main body 6 and main body 3.

Core 13 also has the structure of simplification.

Also can be with

pressure indicating equipment

20 and 21 being increased to reference to the accompanying drawings in 9 the distortion of pointing out of accompanying drawing 8 for example.

Naturally, it is identical that principle of the present utility model keeps, by description and the explanation of unrestricted embodiment, the form of embodiment and the details of structure can change greatly with respect to only, and the utility model extends to all embodiment that rely on identical innovative idea to obtain being equal to effectiveness.

Claims

1. an inductance hydraulic pressure transducer (1), be used for electric domestic appliance, boiler, this inductance hydraulic pressure transducer comprises: stiff case (2), this stiff case has the input connector (5) that at least one (first) is used for hydraulic pressure that will be detected, and limit chamber (12), wherein the mode of not leaking with hydraulic pressure is installed movably barrier film (6), this barrier film has the surface (6b) that operationally is exposed to from the hydraulic pressure of this input connector (5), ferromagnetic core (13) is connected to barrier film (6), and the action that resists elastic biasing means (16) by this way under the effect of this pressure is movably with respect to the fixed coil (9) by this housing (2) carrying, the inductance of feasible this coil (9) in operation changes according to the value of this hydraulic pressure

It is characterized in that: this housing (2) comprises first cup shaped body (3), this cup shaped body has the tubular handle (3a) that wherein limits this input connector (5), and has the opening (3e) that is positioned at this tubular handle (3a) end opposite, and the second tubular drum main body (4), this tubular drum main body is fixed in this first main body (3), and has:

First end (4a), the mode that this first end does not leak with hydraulic pressure clamp the periphery (6a) of this barrier film (6),

Axial pars intermedia (4b), twine this coil (9) around it, and the second end (4c), this the second end limits reaction surface (4e), with this movably related this elastic device (16) of core (13) work against this reaction surface (4e), it is movably that this layout makes core (13) be installed as between this barrier film (6) and this elastic biasing means (16) in the inside of this second main body (4).

2. inductance hydraulic pressure transducer according to claim 1, wherein in the end towards this barrier film (6), the center section (4b) of this drum main body (4) is with respect to this first main body (3) clamping hydraulic seal (18).

3. inductance hydraulic pressure transducer according to claim 1, wherein the first end (4a) of this drum main body (4) has the snap fit device (10) that engages with the corresponding maintenance seat (11) of first main body (3).

4. inductance hydraulic pressure transducer according to claim 3, wherein this stationary installation (10) is positioned between this barrier film (6) and this lip ring (18).

5. inductance hydraulic pressure transducer according to claim 1, wherein this core (13) has the tubular element (14) that is encapsulated in the ferromagnetic material in the electrical isolation housing (15).

6. inductance hydraulic pressure transducer according to claim 1, wherein also have the elastic device (17) related with this barrier film (6), what this elastic device acted on this barrier film (6) operationally is exposed to the side (6b) that this wants detected hydraulic pressure, and promotes it on the opposite direction of the power that applies with this first elastic device (16).

7. inductance hydraulic pressure transducer according to claim 1, second input connector (18) that wherein is used for second pressure that will be detected is set at the second end (4c) of this drum main body (4), being positioned at away from the part on the side of this barrier film (6) of this first input connector (5) of second input connector (18) and this chamber (12) is communicated with, this layout makes this core (13) in operation depend on difference between the pressure that puts on first and second input connectors (5,18) with respect to the position of this coil (9).

8. inductance hydraulic pressure transducer according to claim 1, wherein, in the family expenses heating boiler, use especially, wherein this at least one first input connector (5) is communicated with pipe (20), movably main body (21) is installed in this pipe, when pressure puts on this first input connector (5), this movably main body can adopt from the outside visible position of housing (2), and the pressure that is illustrated in this first input connector exists.

9. inductance hydraulic pressure transducer according to claim 1, wherein this coil (9) is connected to treatment circuit, and this treatment circuit is at least in part by circuit board (30) carrying that is connected to this drum main body (4).

10. inductance hydraulic pressure transducer according to claim 9, wherein this circuit board (30) is a U-shaped, and arranges around the part (4c) of this drum main body (4).

11. inductance hydraulic pressure transducer according to claim 1, wherein the second end (4c) of this second main body (4) seals the opening (3e) of this first main body (3).

12. inductance hydraulic pressure transducer according to claim 1, wherein closing cap (50) is related with the opening (3e) of this first main body (3).