CN202350151U - Air draft and exhaust system - Google Patents
Air draft and exhaust system Download PDFInfo
- Publication number
- CN202350151U CN202350151U CN2011204764139U CN201120476413U CN202350151U CN 202350151 U CN202350151 U CN 202350151U CN 2011204764139 U CN2011204764139 U CN 2011204764139U CN 201120476413 U CN201120476413 U CN 201120476413U CN 202350151 U CN202350151 U CN 202350151U
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- pump drainage
- wind
- air draft
- air
- unit
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Abstract
The utility model relates to an air draft and exhaust system, which comprises an air cabinet and at least one air draft and exhaust unit, wherein each air draft and exhaust unit comprises an air draft and exhaust pipeline arranged at an air inlet/outlet of the air cabinet, and a smoke exhaust hood arranged at one end of the air draft and exhaust pipeline; an electric air valve is arranged inside an air draft port of the smoke exhaust hood; a motor in the air cabinet is electrically connected with a frequency converter; and each air draft and exhaust unit also comprises a control unit for controlling the electric air valve and a stove to synchronously work, and an analog signal detection unit which is electrically connected with the control unit and is used for controlling the output frequency of the frequency converter. By the air draft and exhaust system, the air draft and exhaust quantity can be automatically adjusted according to working conditions of stoves at various working points, and the energy can be saved to a great degree.
Description
Technical field
The utility model relates to a kind of kitchen exhaust system, relates in particular to a kind of kitchen exhaust system with frequency conversion control technique.
Background technology
Existing commercial kitchen exhaust system all is made up of one or several pump drainage airduct road; Every airduct is provided with a cabinet formula blower fan and a plurality of suction opeing solves the pump drainage wind demand of each operating point, and no matter whether is working each operating point, and blower fan is full power operation at full speed all, has therefore wasted a large amount of energy.
The utility model content
The technical problem that the utility model will solve is, to the above-mentioned defective of prior art, a kind of pump drainage wind system is provided.
The utility model solves the technical scheme that its technical problem adopted: construct a kind of pump drainage wind system; Comprise wind cabinet and at least one pump drainage wind unit, each said pump drainage wind unit comprises is located at the Cooker hood that said wind cabinet goes out the pump drainage airduct road of air intake vent and is located at said pump drainage airduct road one end; Be provided with Electric air valve in the suction opeing of said Cooker hood, motor in the said wind cabinet and frequency converter electrically connect;
Said pump drainage wind unit also comprises and is used to control control module that said Electric air valve works asynchronously with stove and accessory and the analog signal detection unit that electrically connects with said control module, be used to control said frequency converter output frequency height.
The described pump drainage wind system of the utility model, wherein, said wind cabinet comprises having said the go out housing of air intake vent, the said motor of being located at the wind wheel in the said housing and electrically connecting with said wind wheel.
The described pump drainage wind system of the utility model, wherein, a plurality of said pump drainage wind unit is connected in parallel to each other.
The described pump drainage wind system of the utility model, wherein, said control module comprises single-chip microcomputer.
The described pump drainage wind system of the utility model, wherein, said analog signal detection unit comprises the flue gas concentration detector be located in the said pump drainage airduct road, is located at temperature sensor or gas flow detector on the said stove and accessory.
Implement the pump drainage wind system of the utility model, have following beneficial effect: the pump drainage wind system of the utility model can be regulated the pump drainage air quantity automatically according to the situation of each operating point stove and accessory work, can save the energy to a great extent.
Description of drawings
To combine accompanying drawing and embodiment that the utility model is described further below, in the accompanying drawing:
Fig. 1 is the block diagram of a kind of pump drainage wind system of the utility model preferred embodiment;
Fig. 2 is the circuit theory diagrams of a kind of pump drainage wind system of the utility model preferred embodiment.
The specific embodiment
As shown in Figure 1, in the preferred embodiment of the utility model, this pump drainage wind system comprises wind cabinet and at least one pump drainage wind unit.Further, each pump drainage wind unit comprises again and is located at the Cooker hood that the wind cabinet goes out the pump drainage airduct road of air intake vent and is located at pump drainage airduct road one end.In the preferred embodiment of the utility model, be provided with Electric air valve 100 in the suction opeing of Cooker hood, and the motor in the wind cabinet 200 electrically connects with frequency converter 300.
Secondly, pump drainage wind unit also comprise be used to control control module 400 that Electric air valve 100 work asynchronously with stove and accessory and with control module 400 electric connections, be used to control frequency converter 300 output frequencies analog signal detection unit 500 just.
As shown in Figure 1, connect three phase mains, start frequency converter 300, wind cabinet motor 200 brings into operation with low speed; Arbitrary control module 400 is connected; Relevant with it Electric air valve 100 is opened immediately automatically; Relevant with it simultaneously stove and accessory ignition operation; Along with switching on and off of control module 400, the output voltage of analog signal detection unit 500 also changes thereupon, and the output frequency of frequency converter 300 also changes thereupon.
Learn from fluid mechanics principle, because of blower fan belongs to typical square of torque load(ing) type, thus its power (shaft power), torque (pressure), relation (correspondence theorem) below rotating speed (air quantity) satisfies:
P electricity=P axle=QH
Q1/Q0=N1/N0 is Q1=QN1/N0 then
P1/P0=(N1/N0) ^3 is P1=P0 (N1/N0) ^3 then
In the formula:
The rated speed of N0 blower fan;
The air quantity of Q0 blower fan;
The blast of H0 blower fan;
The shaft power of P0 blower fan;
The rotating speed of N1 speed governing rear fan;
The air quantity of Q1 speed governing rear fan;
The blast of H1 speed governing rear fan;
The shaft power of P1 speed governing rear fan;
Rotating speed formula n=60f (the 1-s)/p of asynchronous machine
In the formula:
The rotating speed of n asynchronous machine;
The f supply frequency;
The revolutional slip of s asynchronous machine;
The number of poles of p asynchronous machine.
Can calculate the shaft power P1 and the air quantity Q1 of the wind cabinet when wind cabinet electric machine frequency is reduced to F1 (40Hz) by F0 (50Hz) according to above principle:
P1＝((F1/F0)^3)P0＝0.512P0
Q1＝(F1/F0)Q0＝0.8Q0
Can find out that by following formula power can reduce nearly 50% when air quantity reduces by 20%.
According to the operation principle of above-mentioned principle below in conjunction with detailed description of the drawings the utility model.
As shown in Figure 2; Contact K in the control module 400 is closed, thereby the output voltage U s of analog signal detection unit 500 is increased, and the output frequency of the high more then frequency converter 300 of voltage U s is also high more; When all working point is all in running order; Then the output frequency of frequency converter 300 is the highest frequency 50Hz of setting, and when the operating point quit work, the contact K in the control module 400 can break off; And when all working point all quits work; Be to guarantee circulation of air and the cooling demand of wind cabinet motor 200 in the kitchen, the output frequency of frequency converter 300 remains on about 25Hz, can know that according to the principles of electric and electronic engineering output voltage U s of analog signal detection unit when working simultaneously M operating point is:
Us＝U0(R0/(R0+Ri×M))
In the formula:
Us is added in the control voltage on the Vs terminal for the analog signal detection unit;
U0 is the supply voltage (10V) of analog signal detection unit;
R0 is dead load resistance (1k);
Ri is regulating load resistance (1.5Ro＜(Ri * N)＞Ro);
N be a typhoon cabinet with the suction opeing number;
M is the control module number of connecting simultaneously.
Preferably, above-mentioned wind cabinet comprises the housing that has air intake vent, the motor 200 of being located at the wind wheel in the housing and electrically connecting with wind wheel.The structure of wind cabinet belongs to existing known technology, no longer narrates at this.Understandable, a plurality of pump drainage wind unit should be the parallel connection relation.
Preferably, above-mentioned control module 400 can adopt single-chip microcomputer, and analog signal detection unit 500 can be for being located at flue gas concentration detector in the pump drainage airduct road, being located at temperature sensor or gas flow detector on the stove and accessory.
Above embodiment only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the personage who is familiar with this technology can understand content of the utility model and enforcement in view of the above, can not limit the protection domain of the utility model.All equalizations of being done with the utility model claim scope change and modify, and all should belong to the covering scope of the utility model claim.
Claims (5)
1. a pump drainage wind system is characterized in that, comprises wind cabinet and at least one pump drainage wind unit, and each said pump drainage wind unit comprises is located at the Cooker hood that said wind cabinet goes out the pump drainage airduct road of air intake vent and is located at said pump drainage airduct road one end; Be provided with Electric air valve (100) in the suction opeing of said Cooker hood, the motor (200) in the said wind cabinet electrically connects with frequency converter (300);
Said pump drainage wind unit also comprises and is used to control control module (400) that said Electric air valve (100) works asynchronously with stove and accessory and the analog signal detection unit (500) that electrically connects with said control module (400), be used to control said frequency converter (300) output frequency height.
2. pump drainage wind system according to claim 1 is characterized in that, said wind cabinet comprises having said the go out housing of air intake vent, the said motor (200) of being located at the wind wheel in the said housing and electrically connecting with said wind wheel.
3. pump drainage wind system according to claim 1 is characterized in that, a plurality of said pump drainage wind unit is connected in parallel to each other.
4. pump drainage wind system according to claim 1 is characterized in that, said control module (400) comprises single-chip microcomputer.
5. pump drainage wind system according to claim 1 is characterized in that, said analog signal detection unit (500) comprises the flue gas concentration detector be located in the said pump drainage airduct road, is located at temperature sensor or gas flow detector on the said stove and accessory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204764139U CN202350151U (en) | 2011-11-25 | 2011-11-25 | Air draft and exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204764139U CN202350151U (en) | 2011-11-25 | 2011-11-25 | Air draft and exhaust system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202350151U true CN202350151U (en) | 2012-07-25 |
Family
ID=46539153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204764139U Expired - Fee Related CN202350151U (en) | 2011-11-25 | 2011-11-25 | Air draft and exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202350151U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142070A (en) * | 2013-05-06 | 2014-11-12 | 宁夏嘉翔自控技术有限公司 | Intelligent treatment electrical automatic control system for smoke of electrically-calcined furnace |
| CN109954393A (en) * | 2017-12-22 | 2019-07-02 | 梧州市旺捷机械制造有限公司 | Workshop smoke and dust purifier and its control system |
| CN110030593A (en) * | 2019-03-29 | 2019-07-19 | 建研科技发展（深圳）有限公司 | A kind of petticoat pipe frequency conversion system and control method |
| EP4083519A1 (en) * | 2021-04-27 | 2022-11-02 | BSH Hausgeräte GmbH | Exhaust hood and method for operating an exhaust hood |
-
2011
- 2011-11-25 CN CN2011204764139U patent/CN202350151U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142070A (en) * | 2013-05-06 | 2014-11-12 | 宁夏嘉翔自控技术有限公司 | Intelligent treatment electrical automatic control system for smoke of electrically-calcined furnace |
| CN109954393A (en) * | 2017-12-22 | 2019-07-02 | 梧州市旺捷机械制造有限公司 | Workshop smoke and dust purifier and its control system |
| CN110030593A (en) * | 2019-03-29 | 2019-07-19 | 建研科技发展（深圳）有限公司 | A kind of petticoat pipe frequency conversion system and control method |
| EP4083519A1 (en) * | 2021-04-27 | 2022-11-02 | BSH Hausgeräte GmbH | Exhaust hood and method for operating an exhaust hood |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20141125 |
|
| EXPY | Termination of patent right or utility model |