CN201672117U - Digital constant air volume valve - Google Patents
Digital constant air volume valve Download PDFInfo
- Publication number
- CN201672117U CN201672117U CN2010201348974U CN201020134897U CN201672117U CN 201672117 U CN201672117 U CN 201672117U CN 2010201348974 U CN2010201348974 U CN 2010201348974U CN 201020134897 U CN201020134897 U CN 201020134897U CN 201672117 U CN201672117 U CN 201672117U
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- China
- Prior art keywords
- valve
- ddc
- air quantity
- pipe
- electron plate
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- Expired - Fee Related
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Abstract
The utility model aims to provide a digital constant air volume valve, which effectively solves the problems of large graduation error, difficult detachment and installation and the like in the prior art. The digital constant air volume valve comprises a valve tube, two ends of the valve tube are respectively provided with an air inlet and an air outlet, a control box is arranged inside the valve tube, an air pressure pipe and an adjustable valve plate are arranged inside the valve tube, a pressure differential sensor, a DDC electronic board and an electric executor are arranged inside the control box, the air pressure pipe is connected with the pressure differential sensor through a hose, the pressure differential sensor is connected with the DDC electronic board through a lead, the DDC electronic board is connected with the electric executor through a lead, and the electric executor is connected with the adjustable valve plate. The digital constant air volume valve is convenient in installation, cannot be limited by any mounting position, is convenient in maintenance and small in air volume error which can be controlled within 2%, and is stable in performance and long in service life generally over than 30 years.
Description
Technical field
The utility model relates to a kind of air quantity valve of deciding, particularly a kind of digital air quantity valve of deciding.
Background technique
Decide the air quantity valve, be a kind of mechanical type from power apparatus, being applicable to needs to decide in the ventilation and air conditioning system of air quantity.Deciding the control of air quantity valve air quantity does not need additionaling power, and it relies on the interior air-flow power of airduct to come the position of positioning control valve, thereby in whole differential pressure range air-flow is remained on the preset flow rate.
As shown in Figure 1, the conventional mechanical formula is decided the air quantity valve and is made up of valve block 101, air bag 102, spring sheet 103, the abnormity wheel 104 that links to each other with spring sheet 103 etc., and air bag 102 has aperture to communicate with valve block.In Fig. 1, the left side is distinguished and admirable Inbound (airflow direction), when the airduct internal pressure increases (or flow increase), the airbag inflation that communicates with valve block, volume become big, make that closing torque increases, valve block is to closing the motion of valve direction, be subjected to the restriction of spring sheet simultaneously and keep balance, thereby increased the local resistance of valve, reach the constant effect of air quantity that keeps.Otherwise when the airduct internal pressure reduced (or flow reduces), air bag shrank, and volume reduces, and closes torque and weakens, and valve block moves to opening direction, makes air quantity remain unchanged.In addition, the adjustability of air quantity is realized in the position that can pass through adjusting abnormity wheel, and special-shaped wheel location is depicted as dial from 0 °-90 ° by 15 ° of airflow value that increase angle variation correspondence, with the convenient design air flow value of setting.
This class mechanical type is decided the air quantity valve because of himself running principle restriction, and its air quantity error is bigger, and generally about ± 10%, its air quantity scale also has error simultaneously, generally about ± 4%.This mechanical type is decided common each specification of air quantity valve can only carry out 5 kinds of airflow value settings, and the setting meeting error of other intermediate values is bigger, and stability is relatively poor.Decide the mounting point difference of air quantity valve, the influence of its valve block gravity factor also can make its airflow value produce change, and the performance of its air bag and spring sheet changes, and working life is shorter, generally only about 10 years.Particularly air bag in case damage needs to change, just can carry out after valve body must being disassembled from the air channel is installed, and its operating process is difficulty very, at the actual motion scene is impossible realize.
Summary of the invention
The purpose of this utility model provides a kind of digital air quantity valve of deciding, efficiently solve the error of graduation that exists in the prior art big, remove and install problems such as difficulty.The utility model designs a kind of digital air quantity valve of deciding, comprise the valve pipe, valve pipe two ends are respectively equipped with intake grill and exhaust outlet, valve pipe inside is provided with Direct box, be provided with air pressure pipe and adjustable valve block in the valve pipe, be provided with differential pressure pickup, DDC electron plate and electric actuator in the Direct box, air pressure pipe is connected with differential pressure pickup by soft pipeline, differential pressure pickup is by lead and DDC electron plate, the DDC electron plate is connected with electric actuator by lead, and electric actuator is connected with adjustable valve block.Described valve pipe is provided with liquid crystal display outward, and described liquid crystal display is connected with the DDC electron plate by datawire.Described valve pipe is provided with PC outward, and described PC is connected with the DDC electron plate by datawire.Described DDC electron plate is provided with the DDC controller that can edit control program.Be provided with transformer and terminal board in the described Direct box.The utility model is easy for installation, not limited by any mounting point, is convenient to maintenance, and the air quantity error is little, can be controlled in 2%, and stable performance, long service life is generally more than 30 years.
Description of drawings
Accompanying drawing 1 is the prior art constructions schematic representation,
Accompanying drawing 2 is a structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
As shown in Figure 2, comprise valve pipe 1 among the figure, valve pipe 1 two ends are respectively equipped with intake grill 2 and exhaust outlet 3, valve pipe inside is provided with Direct box 4, is provided with air pressure pipe 5 and adjustable valve block 9 in the valve pipe, is provided with differential pressure pickup 6, DDC electron plate 7 and electric actuator 8 in the Direct box, air pressure pipe is connected with differential pressure pickup by soft pipeline, differential pressure pickup is by lead and DDC electron plate, and the DDC electron plate is connected with electric actuator by lead, and electric actuator is connected with adjustable valve block.Described valve pipe is provided with liquid crystal display outward, and described liquid crystal display is connected with the DDC electron plate by datawire.Described valve pipe is provided with PC outward, and described PC is connected with the DDC electron plate by datawire.Described DDC electron plate is provided with the DDC controller that can edit control program.Be provided with transformer 10 and terminal board 11 in the described Direct box.
Described valve pipe is provided with liquid crystal display outward, and described liquid crystal display is connected with the DDC electron plate by datawire.Described valve pipe is provided with PC outward, and described PC is connected with the DDC electron plate by datawire.The utility model can be set required design air flow value by external liquid crystal display, also can set required design air flow value by PC.
Air pressure pipe of the present utility model detects the air stream dynamic pressure value of stream by this valve, air pressure pipe is connected with differential pressure pickup by soft pipeline, differential pressure pickup converts its atmospheric pressure value to electrical signal, after the DDC electronic edition is handled, be converted into valve moment airflow value, and compare with the design air flow value.When valve moment airflow value during greater than the design air flow value, the shutdown signal of a 0-10V of DDC electron plate output is given electric actuator, electric actuator drives adjustable valve block and moves to the throttle down direction, make the ventilating air amount reduce, this valve moment airflow value is made comparisons with the design air flow value again immediately simultaneously, if valve moment airflow value is little when the design air flow value, DDC electron plate output start signal is given electric actuator, make the adjustable valve block of valve move to opening direction, feedback signal and execution so constantly, make valve moment airflow value equal the design air flow value, thereby the valve airflow value obtains split hair control, the airflow value error can be controlled in 2%.
The DDC electron plate is provided with the DDC controller that can edit control program, even at power failure state, control program also can forever be preserved.The utility model adopts digital DDC electronic control, can set a plurality of design air flow values by the PC editor, and can be by multiple logical relation operation control.Summer is when sending cold wind, and the user can and then set different operation design air flow values according to the corresponding different heat load of different time sections, thus energy-conserving and environment-protective more.
Claims (6)
1. digitally decide the air quantity valve, comprise the valve pipe, valve pipe two ends are respectively equipped with intake grill and exhaust outlet, valve pipe inside is provided with Direct box, it is characterized in that: be provided with air pressure pipe and adjustable valve block in the valve pipe, be provided with differential pressure pickup, DDC electron plate and electric actuator in the Direct box, air pressure pipe is connected with differential pressure pickup by soft pipeline, differential pressure pickup is connected with the DDC electron plate by lead, the DDC electron plate is connected with electric actuator by lead, and electric actuator is connected with adjustable valve block.
2. the digital air quantity valve of deciding as claimed in claim 1, it is characterized in that: described valve pipe is provided with liquid crystal display outward, and described liquid crystal display is connected with the DDC electron plate by datawire.
3. the digital air quantity valve of deciding as claimed in claim 1, it is characterized in that: described valve pipe is provided with PC outward, and described PC is connected with the DDC electron plate by datawire.
4. as any described digital air quantity valve of deciding among the claim 1-3, it is characterized in that: described DDC electron plate is provided with the DDC controller that can edit control program.
5. the digital air quantity valve of deciding as claimed in claim 1 is characterized in that: be provided with transformer in the described Direct box.
6. the digital air quantity valve of deciding as claimed in claim 1 is characterized in that: be provided with terminal board in the described Direct box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201348974U CN201672117U (en) | 2010-03-18 | 2010-03-18 | Digital constant air volume valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201348974U CN201672117U (en) | 2010-03-18 | 2010-03-18 | Digital constant air volume valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201672117U true CN201672117U (en) | 2010-12-15 |
Family
ID=43329529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201348974U Expired - Fee Related CN201672117U (en) | 2010-03-18 | 2010-03-18 | Digital constant air volume valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201672117U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914029A (en) * | 2012-10-26 | 2013-02-06 | 江苏兆胜空调有限公司 | Micro-positive pressure distribution control module for air-conditioning air system for ship |
-
2010
- 2010-03-18 CN CN2010201348974U patent/CN201672117U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914029A (en) * | 2012-10-26 | 2013-02-06 | 江苏兆胜空调有限公司 | Micro-positive pressure distribution control module for air-conditioning air system for ship |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20130318 |