CN201219084Y - Differential pressure switch - Google Patents
Differential pressure switch Download PDFInfo
- Publication number
- CN201219084Y CN201219084Y CNU2008201115483U CN200820111548U CN201219084Y CN 201219084 Y CN201219084 Y CN 201219084Y CN U2008201115483 U CNU2008201115483 U CN U2008201115483U CN 200820111548 U CN200820111548 U CN 200820111548U CN 201219084 Y CN201219084 Y CN 201219084Y
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- contact
- pressure chamber
- moving contact
- pressure difference
- low
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Abstract
The utility relates to a pressure difference switch which adopts a diaphragm for separating to high and low pressure sealing device. The high and low pressure chamber are both provided with an aeration port for communicating with air current to be measured; distortion arising from diaphragm is in proportion to pressure difference; a actuation mechanism is disposed in low pressure chamber comprising two upper and lower static contact and a dynamic contact between the two static contact; dynamic contact and upper static contact constitutes a group of normal closed contacts; dynamic contact and lower contact constitutes a group of constant open contacts. The utility has a beautiful appearance, accurate and reliable action, low cost and high sensitivity, and is easily for assemblage; The utility is widely used among automatic control air conditioning system of mansions, provides failure detection means for normal operation of air conditioning system, largely promotes safety and reliability of system.
Description
Technical field
The utility model relates to a kind of building automatic control central air-conditioning unit screen pack that is mainly used in and stops up the pressure difference switch that protection and fan airflow detect, and belongs to International Classification of Patents H01H35/00 " by the switch of the change operation of physical state " technical field.
Background technology
In the prior art, the method that detects fan airflow mostly is indirect detection fan power main contactor, and whether closure is judged, yet main contactor closure, might not represent motor to turn round, do not represent blower fan to work, certainly can not directly reflect has airless, and often causes the system fan erroneous judgement.And the plugged filter of air conditioner guarantees the normal operation of air-conditioning system by regular cleaning, but influences system's operate as normal also plugged filter occurring under the abominable natural environment in regularly.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of pressure difference switch that can effectively detect and improve the system safety reliability is provided.
The technical solution of the utility model is as follows.
A kind of pressure difference switch is the sealing device that a usefulness diaphragm is divided into the high and low pressure chamber, and the high and low pressure chamber respectively is provided with a blow vent and communicates with tested air-flow, and the distortion size that described diaphragm produces is directly proportional with magnitude of pressure differential.
Be provided with set mechanism in the described low-pressure chamber, comprise upper and lower two fixed contacts and between a moving contact; Moving contact and last fixed contact are formed one group of normally-closed contact, and moving contact and following fixed contact are formed one group of normally opened contact.Be provided with moving contact mechanism in the low-pressure chamber, comprise moving contact, sense mould sheet and sliding piece, an end of sense mould sheet connects sliding piece.
Device of the present utility model is elegant in appearance, and is simple in structure, is easy to assembling.Topmost advantage is highly sensitive, action accurately and reliably, cheap, air-conditioning automatic control level is improved, this product is used widely in a large amount of building self control air conditioning systems, for the normal operation of central air conditioner system provides the fault detect means, improved the security reliability of system greatly.
Description of drawings
Fig. 1 is the structural representation of the utility model pressure difference switch low-pressure chamber;
Fig. 2 is the profile and the make and break contact figure of pressure difference switch.
Among the figure: 1, low-pressure chamber, 2, spring, 3, fixed contact down, 4, go up fixed contact, 5, moving contact, 6, sliding piece, 7, sense mould sheet.
Embodiment
As shown in Figure 1, 2, pressure difference switch of the present utility model is a kind of transmitting device of experiencing air-flow differential, when the survey air-flow differential reach device give set point the time, can send a switching value signal.This device is mainly used in the detection that has or not that building automatic control central air-conditioning unit screen pack stops up protection and fan airflow.This device is the sealing device that a usefulness diaphragm is divided into the high and low pressure chamber, its profile is seen Fig. 1, two Room respectively have a blow vent to communicate with tested air-flow, and film is experienced the pressure differential of high and low voltage chamber's air-flow, and diaphragm produces distortion size (axial displacement) and is directly proportional with magnitude of pressure differential.
Referring to Fig. 2, in low-pressure chamber, be provided with one group of mechanical motion mechanism, critical piece is up and down fixed contact 4,3 and moving contact 5; Moving contact 5 and fixed contact 4 are formed one group of normally-closed contact, and moving contact 5 and fixed contact 3 are formed one group of normally opened contact.
Moving contact mechanism comprises moving contact 5, sense mould sheet 7, sliding piece 6.The displacement that diaphragm produces acts directly on the sense mould sheet 7, drives moving contact 5 knee-actions thereby sense mould sheet 7 drives sliding piece 6 knee-actions, makes normally opened contact become normally-closed contact, and normally-closed contact becomes normally opened contact.The pressure differential resetting value is the adjusting by rotation scale, changes the holding power of moving contact 5 following springs 2, and after air-flow differential had overcome this spring force, moving contact could move.
When concrete detection, the bleed of filter both sides flows to pressure difference switch in order to detect the chocking-up degree of filter, the switching value signal that detects is delivered to the switching value input port of computer, and whether the air-supply side of air-conditioning ventilating and return side bleed flow to pressure difference switch and blow in order to detect forced draft fan.If air-supply for a certain reason and not, pressure difference switch returns to poised state, and the closure state of normally opened contact when air-flow is arranged returns to normally open, and computer will judge which kind of measure this takes according to the signal of receiving.
Claims (3)
1, a kind of pressure difference switch is characterized in that: be the sealing device that a usefulness diaphragm is divided into the high and low pressure chamber, the high and low pressure chamber respectively is provided with a blow vent and communicates with tested air-flow, and the distortion size that described diaphragm produces is directly proportional with magnitude of pressure differential.
2, pressure difference switch according to claim 1 is characterized in that: be provided with set mechanism in the described low-pressure chamber, comprise upper and lower two fixed contacts and between a moving contact; Moving contact and last fixed contact are formed one group of normally-closed contact, and moving contact and following fixed contact are formed one group of normally opened contact.
3, pressure difference switch according to claim 1 is characterized in that: be provided with moving contact mechanism in the low-pressure chamber, comprise moving contact, sense mould sheet and sliding piece, an end of sense mould sheet connects sliding piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201115483U CN201219084Y (en) | 2008-05-14 | 2008-05-14 | Differential pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201115483U CN201219084Y (en) | 2008-05-14 | 2008-05-14 | Differential pressure switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201219084Y true CN201219084Y (en) | 2009-04-08 |
Family
ID=40541919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201115483U Expired - Fee Related CN201219084Y (en) | 2008-05-14 | 2008-05-14 | Differential pressure switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201219084Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103069520A (en) * | 2010-07-23 | 2013-04-24 | Fep车辆电气皮尔纳公司 | Pressure switch |
| CN104192571A (en) * | 2014-08-21 | 2014-12-10 | 信易电热机械有限公司 | Vacuum filling machine for high-temperature PET raw material conveying |
| CN112146227A (en) * | 2020-08-31 | 2020-12-29 | 珠海格力电器股份有限公司 | Pressure detection switch, air conditioner control method and device, air conditioner and storage medium |
-
2008
- 2008-05-14 CN CNU2008201115483U patent/CN201219084Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103069520A (en) * | 2010-07-23 | 2013-04-24 | Fep车辆电气皮尔纳公司 | Pressure switch |
| CN103069520B (en) * | 2010-07-23 | 2015-07-22 | Fep车辆电气皮尔纳两合股份有限公司 | Pressure switch |
| CN104192571A (en) * | 2014-08-21 | 2014-12-10 | 信易电热机械有限公司 | Vacuum filling machine for high-temperature PET raw material conveying |
| CN112146227A (en) * | 2020-08-31 | 2020-12-29 | 珠海格力电器股份有限公司 | Pressure detection switch, air conditioner control method and device, air conditioner and storage medium |
| CN112146227B (en) * | 2020-08-31 | 2022-04-12 | 珠海格力电器股份有限公司 | Pressure detection switch, air conditioner control method and device, air conditioner and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING BESTON INTELLIGENT TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: BEIJING BESTON ENGINEERING TECHNOLOGY CO., LTD. Effective date: 20101213 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100083 NO.A-8, LANGQIUYUAN, TAYUAN, HAIDIAN DISTRICT, BEIJING TO: 100191 NO.A-8, LANGQIUYUAN, TAYUAN, HAIDIAN DISTRICT, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20101213 Address after: 100191 Beijing City, Haidian District Tayuan autumn Lang Park No. 8 Patentee after: Beijing Beston Intelligent Technology Co Ltd Address before: 100083 Beijing City, Haidian District Tayuan autumn Lang Park No. 8 Patentee before: Beijing BESTON Engineering Technology Co., Ltd. |
|
| DD01 | Delivery of document by public notice |
Addressee: Beijing Beston Intelligent Technology Co Ltd Beijing Beston Intelligent Technology Co., Ltd Yu Wenting Document name: Notification to Pay the Fees |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090408 Termination date: 20120514 |