CN2329946Y - Flow sensor for air quantity change end device - Google Patents
Flow sensor for air quantity change end device Download PDFInfo
- Publication number
- CN2329946Y CN2329946Y CN 98205768 CN98205768U CN2329946Y CN 2329946 Y CN2329946 Y CN 2329946Y CN 98205768 CN98205768 CN 98205768 CN 98205768 U CN98205768 U CN 98205768U CN 2329946 Y CN2329946 Y CN 2329946Y
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- CN
- China
- Prior art keywords
- air
- pipe
- air quantity
- end device
- sensor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a flow sensor for an alterable air quantity end device. The sensor is composed of pipe seats, an inner pipe, an outer pipe, a speed measuring element and a connecting conducting wire, wherein the pipe seats are fixed on both ends of the inner pipe and are respectively provided with an air inlet and an air outlet, the speed measuring element is arranged in the inner pipe and the connecting conducting wire is connected with the speed measuring element. The sensor has the advantages of wide measuring range, sensitive response, simple structure, low price, etc.
Description
The utility model relates to a kind of air quantity variable end device, belongs to air conditioner technical field.
Air conditioning system with variable is to use more in recent years abroad and just at the novel air conditioning system of China's develop and spread, has the advantages that energy-conservation and automatic adaptation room load changes.Air quantity variable end device is the important component part of air conditioning system with variable.Pressure independent type air quantity variable end device is a kind of form of air quantity variable end device.Its principle of work is: the air-valve on the end equipment is according to the set point adjustment air output of air-conditioned room temperature controller, be that valve reaches certain position, at this moment as if of the variation of other air-conditioned room owing to desired temperature, and cause the variation of air output, this room air quantity variable end device upstream pressure is changed, valve on this end equipment need be regulated according to flow signal at this moment, and is constant with the air output that keeps this air-conditioned room.
Flow measurement device is very important ingredient in pressure independent type end equipment, and the end equipment flow then is the critical component in the flow measurement device.U.S. ENVION-TEC has similar products, and the principle of this product is: sensor measurement be pressure difference signal.When the end equipment flow not simultaneously, sensor is according to different pressure difference signals, to the different electric signal of external circuit output, reflects that thus the air quantity of end equipment changes.The weak point of this sensor is: the air measuring scope is narrower, little air quantity (air quantity approximately less than the end equipment ratings 12%) time can not measure accurately.
The purpose of this utility model is a kind of air quantity variable end device flow sensor of design, changes the structure of prior art, will change into the flow of directly measuring end equipment according to air velocity according to the principle of pressure difference signal measuring wind in the prior art.
The air quantity variable end device flow sensor of the utility model design is by base, interior pipe, outer tube, velocity survey element be connected lead and form.Base is fixed in interior Guan Erduan, is respectively equipped with air intake and outlet on the base, and outer tube sleeve in the pipe, connects lead and velocity survey element and joins, and draw between the inner and outer pipe in the velocity survey element is located at outside interior pipe stage casing.
The flow sensor of the utility model design is specially adapted to the flow measurement of pressure independent type air quantity variable end device, and have measurement range wide, be quick on the draw, simple in structure, cheap characteristics.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the schematic diagram of measuring wind speed element.
Below in conjunction with accompanying drawing, introduce content of the present utility model in detail.Among Fig. 1, the 1st, base, the 2nd, interior pipe, the 3rd, outer tube, the 4th, the velocity survey element, the 5,8,9, the 10th, connect lead, the 6th, air intake, the 7th, air out.Among Fig. 2, the 11st, heated filament, the 12nd, thermocouple.
As shown in Figure 1, the air quantity variable end device flow sensor is by base 1, interior pipe 2, outer tube 3, velocity survey element 4 be connected lead 5,8,9,10 and form; Two ends of pipe 2 in base 1 is fixed in are respectively equipped with air intake 6 and outlet 7 on the base 1, in the pipe, connect lead and velocity survey element 4 and join, and draw between the inner and outer pipe in velocity survey element 4 is located at.
The course of work of the present utility model is: air-flow is entered by the inlet 6 of base 1, and pipe 2 in flowing into flows through speed gauge head 4, flows out from the outlet 7 of another base then.Air mass flow in end equipment is not both, air velocity difference in the sensor, velocity survey element 4 is by connecting the different electric signal of lead 5,8,9,10 outputs, and the power of electric signal has promptly reflected the flow of the variable air rate window machine that links with this sensor.Heated filament 11 in the velocity survey element makes its heating by lead 5 and 10, and thermocouple 12 will be measured the temperature of heated filament 11, and by lead 8,9 electric signal is exported.When to the heating power of heated filament 11 when constant, the temperature on heated filament surface changes with the difference of the air mass flow of interior pipe, with corresponding electric signal of heated filament surface temperature and inner air tube flow one relation is arranged, thereby can measure flow in the last rapid device according to change in electric.
Claims (1)
1, a kind of air quantity variable end device flow sensor is characterized in that this sensor is by base, interior pipe, outer tube, velocity survey element be connected lead and form; Described base is fixed in interior Guan Erduan, is respectively equipped with air intake and outlet on the base, and outer tube sleeve in the pipe, connects lead and velocity survey element and joins, and draw between the inner and outer pipe in the velocity survey element is located at outside interior pipe stage casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98205768 CN2329946Y (en) | 1998-06-12 | 1998-06-12 | Flow sensor for air quantity change end device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98205768 CN2329946Y (en) | 1998-06-12 | 1998-06-12 | Flow sensor for air quantity change end device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2329946Y true CN2329946Y (en) | 1999-07-21 |
Family
ID=33962078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98205768 Expired - Lifetime CN2329946Y (en) | 1998-06-12 | 1998-06-12 | Flow sensor for air quantity change end device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2329946Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104755886A (en) * | 2012-11-02 | 2015-07-01 | 大陆汽车有限责任公司 | Air mass flowmeter |
-
1998
- 1998-06-12 CN CN 98205768 patent/CN2329946Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104755886A (en) * | 2012-11-02 | 2015-07-01 | 大陆汽车有限责任公司 | Air mass flowmeter |
| CN104755886B (en) * | 2012-11-02 | 2017-10-13 | 大陆汽车有限责任公司 | Air flow meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |