CN201345323Y - Micro differential pressure switch - Google Patents
Micro differential pressure switch Download PDFInfo
- Publication number
- CN201345323Y CN201345323Y CNU2009201059191U CN200920105919U CN201345323Y CN 201345323 Y CN201345323 Y CN 201345323Y CN U2009201059191 U CNU2009201059191 U CN U2009201059191U CN 200920105919 U CN200920105919 U CN 200920105919U CN 201345323 Y CN201345323 Y CN 201345323Y
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- cavity
- switch
- magnet
- minute
- diaphragm
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Abstract
The utility model provides a micro differential pressure switch, which comprises an induction part, a transmission part and a switch control part. The induction part comprises an upper copper body and a lower copper body which are arranged in a clamping manner so as to form a cavity; a diaphragm is arranged in the cavity and divides the cavity into an upper cavity and a lower cavity; a high-pressure water gap and a low- pressure water gap are formed on the side of the cavity, and are used for drawing high and low pressure water current into the upper cavity and the lower cavity respectively; the transmission part is formed by an upper magnet and a lower magnet which have the same magnetism; the lower magnet is propped on the upper surface of the diaphragm via a spring; the upper magnet and the lower magnet are correspondingly arranged; the switch control part comprises a microswitch; the microswitch is provided with a micromotion contact; the micromotion contact is in contact with the upper magnet and moves along with movement of the upper magnet; and the microswitch gives switching signals according to the movement of the micromotion contact. Compared with the prior flow switches, the micro differential pressure switch has great improvement on sensitivity and accuracy of movement.
Description
Technical field
The utility model relates to a kind of minute-pressure difference switch, and particularly a kind of being applied in the central air conditioning equipment fallen the switching device of controlling heat exchanger flow by control heat exchanger hydraulic pressure.
Background technology
Flow switch is a kind of by detecting the water flow of heat exchanger inlet and outlet, and with it with require to move the corresponding pressure differential resetting value of flow and compare, the switching device of output switching signal then.Can control heat exchanger discharge accurately by this flow switch central air conditioning equipment.
What existing flow switch adopted mostly is the target type meter principle design.So-called target type meter principle is exactly on the direction that pipeline center flows perpendicular to fluid a target to be installed, and because be obstructed must impact target, suffered active force and rate of flow of fluid flow between there be certain relation in fluid on the target through out-of-date.Mode by the moment conversion is measured the active force that is subjected on the target, just can obtain fluid flow.But the flow switch of this employing target type meter principle exists in actual use that accuracy is low, poor stability, life-span are short, easily produce problem such as misoperation.And its needed installing space is also bigger.
In view of the existing the problems referred to above of existing flow switch, we have designed a kind of by detecting the flow pressure difference switch of heat exchanger inlet and outlet differential water pressures and then calculated flow rate.
Summary of the invention
Goal of the invention of the present utility model is to solve problems of the prior art, and a kind of installing space compactness, accurate, the stable height of action, long pressure reduction control type flow switch of life-span are provided.
Goal of the invention of the present utility model is achieved by following technical proposals:
The minute-pressure difference switch is characterized in that: comprise induction part, driving section and switch control part;
Described induction part is established by last copper body and following copper body folder and is formed a cavity; In this cavity, be provided with a diaphragm, cavity is cut apart formation upper cavity and lower chamber; Offer the low pressure mouth of a river and the high pressure mouth of a river at this cavity side, respectively in order in described upper cavity and lower chamber, to inject current to be measured;
Described driving section is made of upper magnet and two same sex magnets of lower magnet; This lower magnet is arranged in the described upper cavity, by spring it is butted on the upper surface of described diaphragm; The corresponding setting of this upper magnet with lower magnet;
Described switch control part is made of a sensitive switch; Have a fine motion contact on this sensitive switch; This fine motion contact contacts with described upper magnet, and moves along with the motion of upper magnet; This sensitive switch according to send switching signal with the motion of fine motion contact.
Be provided with the rib of projection in the edge of described diaphragm; Joining place on described between copper body and the following copper body is provided with embedding groove; The rib of described diaphragm edge is corresponding with embedding groove, makes this rib just can be placed in this embedding groove.
On described lower chamber one side, be provided with some projection grains at described diaphragm.
Described spring is the back taper design; The less end of this spring bore supports and terminates on the described lower magnet; The end that this spring bore is bigger supports and terminates in the described copper intracoelomic cavity top of going up.
What described diaphragm adopted is elastomeric material.
What described sensitive switch adopted is VS10N001C2 type sensitive switch.
The beneficial effects of the utility model are: thisly carry out the minute-pressure difference switch of switch control with respect to existing flow switch by detecting the heat exchanger inlet and outlet differential water pressures, its sensitivity and action accuracy have all had large increase, and it takes up room also less relatively.
Description of drawings
Fig. 1 is the structural representation of minute-pressure difference switch.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
The designed minute-pressure difference switch of the utility model is by detecting the flow switch of heat exchanger inlet and outlet differential water pressures and then calculated flow rate.The structure of this minute-pressure difference switch comprises as shown in Figure 1: induction part, driving section and switch control part.
Described induction part is established by last copper body 5 and following copper body 6 folders and is formed a cavity.In this cavity, be provided with a diaphragm 9, cavity is cut apart formation upper cavity and the mutual disconnected space of lower chamber two parts.Offer the high pressure mouth of a river 61 and the low pressure mouth of a river 51 at this cavity side, respectively in order in described lower chamber and upper cavity, to introduce the high-low pressure current.
Described driving section is made of upper magnet 4 and 8 two same sex magnets of lower magnet.This lower magnet 8 is arranged in the described upper cavity, by spring 10 it is butted on the upper surface of diaphragm 9.This upper magnet 4 is arranged on the correspondence position on the axis direction of this lower magnet 8.
Described switch control part mainly is to be made of a sensitive switch 3.Have a fine motion contact 31 on this sensitive switch 3.This fine motion contact 31 contacts with described upper magnet 4, and moves along with the motion of upper magnet 4.This sensitive switch 3 is an electronic switching device, its according to closed or disconnect with the motion of fine motion contact 31.This sensitive switch 3 is electrically connected with cable 12, and the switching signal that it sent exports the controlled equipment of back level to by cable 12.At present, alternative sensitive switch model is a lot of on the market, and concrete employing is VS10N001C2 type sensitive switch in the present embodiment.
The minute-pressure difference switch of said structure is introduced heat exchanger inlet and outlet hydraulic pressure by the high pressure mouth of a river 61 and the low pressure mouth of a river 51.Because the pressure difference of heat exchanger inlet and outlet water forms differential water pressures up and down what it charged between the cavity.The diaphragm 9 of cavity produces displacement under the effect of pressure reduction in order to cut apart up and down, and owing to finally is stabilized in a certain position in order to support spring 10 effects that end lower magnet 8.The lower magnet 8 that support to end on this diaphragm 9 moves up and down with diaphragm displacement, and then promotes upper magnet 4 displacements of corresponding setting with it.After upper magnet 4 is displaced to a certain degree,, make sensitive switch 3 send switching signal with triggering the fine motion contact 31 of fixedlying connected with it.
Therefore the designed minute-pressure difference switch of the utility model is not as existing flow switch, carries out switch control by the flow of measuring heat exchanger.But, promote displacement amplitude size that diaphragm 9 produced according to the import and export differential water pressures of heat exchanger and trigger sensitive switch 3 and send switch controlling signal.Therefore, this minute-pressure difference switch is with respect to existing flow switch, and its sensitivity and action accuracy have all had large increase.And such structural design, it takes up room also less relatively.
By the control principle of above-mentioned minute-pressure difference switch as can be known, the stability of this minute-pressure difference switch largely depends on the displacement stability of described diaphragm 9.Therefore, in order to improve the stability of minute-pressure difference switch, what the material of described diaphragm 9 adopted is elastomeric material.
Also have, the sealing between the cavity up and down in the described induction part also is the key factor of this minute-pressure difference switch precise control of decision.Therefore, in order further to strengthen the sealing between the cavity up and down, present embodiment has carried out special structural design at the diaphragm 9 and the joining place of copper body up and down.Be provided with the rib of projection in the edge of this diaphragm 9, and the corresponding embedding groove that is provided with of joining place between last copper body 5 and following copper body 6.The described rib of being located at diaphragm edge just can be placed in this embedding groove.Obviously, such structural design can further strengthen the sealing between the cavity up and down.
In addition, the utility model also is provided with some projection grains in this diaphragm 9 cavity one side that faces down.Like this, can make that the minute-pressure difference switch is unlikely is close to the accuracy that following copper body 6 walls influence pressure measurement because of diaphragm 9.
As shown in Figure 1, described spring 10 is the back taper design.The less end of its bore supports and terminates on the lower magnet 8, and the end that its bore is bigger supports and terminates in top of chamber in the copper body 5.Like this, spring 10 not only can provide balance, stablize the elastic force of diaphragm 9 deformation, can also play position-limiting action to lower magnet 8, makes it be difficult for producing in a lateral direction displacement.
In sum, the designed minute-pressure difference switch of the utility model is to promote displacement that diaphragm 9 produced according to the import and export differential water pressures of heat exchanger to trigger sensitive switch 3 and send switch controlling signal.Such structure can improve sensitivity, stability and the action accuracy of minute-pressure difference switch control effectively.Any under the design spirit of the utility model, the foreseeable structure of modification of being done all should be considered as within protection range of the present utility model.
Claims (6)
1, minute-pressure difference switch is characterized in that: comprise induction part, driving section and switch control part;
Described induction part is established by last copper body and following copper body folder and is formed a cavity; In this cavity, be provided with a diaphragm, cavity is cut apart formation upper cavity and lower chamber; Offer the high pressure mouth of a river and the low pressure mouth of a river at this cavity side, respectively in order in described lower chamber and upper cavity, to introduce the high-low pressure current;
Described driving section is made of upper magnet and two same sex magnets of lower magnet; This lower magnet is arranged in the described upper cavity, by spring it is butted on the upper surface of described diaphragm; The corresponding setting of this upper magnet with lower magnet;
Described switch control part is made of a sensitive switch; Have a fine motion contact on this sensitive switch; This fine motion contact contacts with described upper magnet, and moves along with the motion of upper magnet; This sensitive switch according to send switching signal with the motion of fine motion contact.
2, minute-pressure difference switch as claimed in claim 1 is characterized in that: the rib that is provided with projection in the edge of described diaphragm; Joining place on described between copper body and the following copper body is provided with embedding groove; The rib of described diaphragm edge is corresponding with embedding groove, makes this rib just can be placed in this embedding groove.
3, minute-pressure difference switch as claimed in claim 1 is characterized in that: be provided with some projection grains in described diaphragm cavity one side that faces down.
4, minute-pressure difference switch as claimed in claim 1 is characterized in that: described spring is the back taper design; The less end of this spring bore supports and terminates on the described lower magnet; The end that this spring bore is bigger supports and terminates in the described copper intracoelomic cavity top of going up.
5, minute-pressure difference switch as claimed in claim 1 is characterized in that: what described diaphragm adopted is elastomeric material.
6, minute-pressure difference switch as claimed in claim 1 is characterized in that: what described sensitive switch adopted is VS10N001C2 type sensitive switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201059191U CN201345323Y (en) | 2009-02-13 | 2009-02-13 | Micro differential pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201059191U CN201345323Y (en) | 2009-02-13 | 2009-02-13 | Micro differential pressure switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201345323Y true CN201345323Y (en) | 2009-11-11 |
Family
ID=41276909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201059191U Expired - Fee Related CN201345323Y (en) | 2009-02-13 | 2009-02-13 | Micro differential pressure switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201345323Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242891A (en) * | 2014-09-26 | 2014-12-24 | 思达文电器（深圳）有限公司 | Electronic wind pressure switch and gas appliance |
| CN106328437A (en) * | 2016-10-31 | 2017-01-11 | 江西新明机械有限公司 | Low-pressure magnetic control switch |
| CN108181042A (en) * | 2017-12-08 | 2018-06-19 | 中国航发动力股份有限公司 | A kind of gas turbine differential pressure pickup and method |
| CN108225658A (en) * | 2017-12-08 | 2018-06-29 | 中国航发动力股份有限公司 | A kind of gas turbine differential pressure pickup |
-
2009
- 2009-02-13 CN CNU2009201059191U patent/CN201345323Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242891A (en) * | 2014-09-26 | 2014-12-24 | 思达文电器（深圳）有限公司 | Electronic wind pressure switch and gas appliance |
| CN104242891B (en) * | 2014-09-26 | 2017-12-01 | 思达文电器（深圳）有限公司 | Electronics blast switch and gas utensil |
| CN106328437A (en) * | 2016-10-31 | 2017-01-11 | 江西新明机械有限公司 | Low-pressure magnetic control switch |
| CN106328437B (en) * | 2016-10-31 | 2019-04-02 | 江西新明机械有限公司 | A kind of low pressure magnetic force control switch |
| CN108181042A (en) * | 2017-12-08 | 2018-06-19 | 中国航发动力股份有限公司 | A kind of gas turbine differential pressure pickup and method |
| CN108225658A (en) * | 2017-12-08 | 2018-06-29 | 中国航发动力股份有限公司 | A kind of gas turbine differential pressure pickup |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhangjiakou Guanghua Creation Technology Co., Ltd. Assignor: Beijing GHCS.CN Contract record no.: 2012110000182 Denomination of utility model: Micro differential pressure switch Granted publication date: 20091111 License type: Exclusive License Record date: 20121214 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091111 Termination date: 20180213 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |