CN110906392A - Building smoke exhaust system and operation monitoring method thereof - Google Patents

Abstract

The utility model provides a building system of discharging fume, is including installing the range hood in the kitchen, range hood has the fan, and the fan air outlet is linked together through tobacco pipe and public flue, and the check valve is installed to the exit end of tobacco pipe, range hood takes current detection module or power detection module, its characterized in that: the smoke pipe leakage detection device further comprises a controller capable of reading the current or power value of the fan and the rotating speed value of the fan, and the controller can judge whether the smoke pipe leaks or not by calculating the deviation of the current or power ratio and the rotating speed cubic ratio of the fan at different gears. The invention has the advantages that: this building system of discharging fume controller can read the electric current or the power value and the fan rotational speed value of fan, and the controller can judge whether the tobacco pipe leaks through the deviation of calculating the electric current or power ratio and the rotational speed cubic ratio under the different gears of fan, can reduce the wrong report, and the preposition maintenance of being convenient for promotes user experience.

Description

Building smoke exhaust system and operation monitoring method thereof

Technical Field

The invention relates to a central flue system, in particular to a building smoke exhaust system and an operation monitoring method thereof.

Background

At present, newly-built building floors in cities are generally higher and higher, and mainly adopt engineering fine finishing, and most high-rise residences adopt indoor range hoods, smoke pipes, check valves and public flues to be connected, so that oil smoke in kitchens is discharged into the public flues through the smoke pipes. Traditional range hood is in open state after the installation, and the power actuated setting device breaks when the tobacco pipe is carried out the furred ceiling by the carpenter easily at the fitment in-process, because the oil smoke accumulation in the use, oil net blocks up, the check valve is opened or the tobacco pipe pine takes off, the damage leads to user's smoking effect to descend easily, falls the cigarette and taints the flavor appearance, influences user experience. If only the rotating speed or the sound of the range hood in the normal oil smoke suction working state is used for judging whether leakage needs to be avoided or not, and the inlet interception interference caused by whether the kitchen doors and windows are closed or not is eliminated firstly (under the condition that the doors and windows are all closed, the vacuumizing condition of the range hood occurs, the inlet interception is substantial, squeaking sound with almost rear end leakage can occur, the rear end leakage only generally occurs at the damaged part of a smoke pipe, and the vacuumizing generally occurs at the gap of the doors and windows). In addition, the normal pressure opening and closing check valve has the advantages that the opening angle of the valve plate is changed along with the change of gear change air volume, so that the angle is also changed, and the rear end resistance cannot be directly compared and calculated in fluctuation.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a building smoke exhaust system capable of determining whether smoke pipes are leaked by combining the changes of power values and rotation speeds of fans at different gears.

The second technical problem to be solved by the present invention is to provide an operation monitoring method for a building smoke exhaust system, which can determine whether a smoke pipe leaks and is convenient for prepositive maintenance and repair, in view of the above prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: this building system of discharging fume, including installing the range hood in the kitchen, range hood has the fan, and the fan air outlet is linked together through tobacco pipe and public flue, and the check valve is installed to the exit end of tobacco pipe, the range hood takes current detection module or power detection module, its characterized in that: the smoke pipe leakage detection device further comprises a controller capable of reading the current or power value of the fan and the rotating speed value of the fan, and the controller can judge whether the smoke pipe leaks or not by calculating the deviation of the current or power ratio and the rotating speed cubic ratio of the fan at different gears.

The fan speed can be calculated in various ways, and the controller calculates the current speed through a counter electromotive force or a speed sensor.

Preferably, the smoke pipe is provided with a valve plate control motor for controlling the valve plate of the check valve to open and close.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the operation monitoring method of the building smoke exhaust system is characterized by comprising the following steps of:

1) pressing a corresponding key by a user to wake up or start;

2) selecting whether to enter leakage self-inspection;

3) if not, the valve plate of the check valve is opened;

4) and switching to conventional operation;

5) if yes, operating a leakage self-checking program, and keeping the valve plate closed;

6) default Ti gear operation;

7) reading the full blocking power Pig of the current gear from the built-in storage and calculating the current actual power Pi;

8) judging whether the current Pi is smaller than Pig;

9) if Pi < Pig, prompting that the smoke tube is shriveled and damaged or the smoke tube is deformed, and asking for maintenance;

10) if Pi is larger than or equal to Pig, recording the power Pi and the current corresponding rotating speed ni;

11) judging whether 2 groups of power values and 2 groups of rotating speed values are recorded;

12) if yes, calculating

And

a value of (d);

13) comparing h and s;

14) carrying out interval judgment by using the sizes of h and s;

if h-s is less than or equal to e, judging that the smoke tube has no leakage, and turning to the step 3) to operate;

if h-s is greater than e and h is greater than s, judging that the smoke tube is leaked, and prompting to overhaul;

if h-s is greater than e and h is less than s, judging the fault of the power or current detection module and prompting to overhaul;

15) and if 2 groups of pressure and rotating speed values are not recorded in the step 11), increasing the gear to operate, and switching to the step 7) to operate.

Compared with the prior art, the invention has the advantages that: this building system of discharging fume controller can read the electric current or the power value and the fan rotational speed value of fan, and the controller can judge whether the tobacco pipe leaks through the deviation of calculating the electric current or power ratio and the rotational speed cubic ratio under the different gears of fan, can reduce the wrong report, and the preposition maintenance of being convenient for promotes user experience.

Drawings

FIG. 1 is a schematic diagram of a kitchen structure according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a range hood according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a building smoke evacuation system according to an embodiment of the present invention;

fig. 4 is a control logic diagram of an operation monitoring method according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to fig. 3, the building smoke exhaust system of the present embodiment includes a range hood 1 installed in a kitchen, the range hood 1 has a fan 2, an air outlet of the fan is communicated with a common flue 4 through a smoke pipe 3, an outlet end of the smoke pipe 3 is installed with a check valve 5, the check valve 5 has a valve plate 51, and the smoke pipe 3 is installed with a valve plate control motor 6 for controlling the valve plate 51 of the check valve to open and close. The range hood 1 has a current detection module or a power detection module, a controller (not shown) of the range hood 1 can read a current or a power value of the fan 2 and can read a rotating speed value of the fan 2, and the controller can judge whether the smoke tube 3 leaks or not by calculating the deviation of the current or power ratio and the rotating speed cubic ratio of the fan 2 at different gears.

When the range hood normally works, the working condition changes along with the pressure change of the rear end pipeline, the impeller load is larger when the actual flow is larger, and the required input power is larger. When the smoke pipe is fully blocked or basically blocked, the fan does not actually output air, the smoke pipe is basically equivalent to a circulating stirrer, the rotating speed is close to the no-load high rotating speed of the motor, and the power is basically minimum; on the contrary, when the pipeline is fully opened or not connected, the output power and the air volume are maximum and are close to the bare fan. Therefore, whether the resistance is increased and the flow is reduced due to the fact that whether the power is lower than a certain threshold value or not or whether the smoke tube is shriveled and damaged or whether the bent part is clamped and deformed can be judged.

In addition, under the condition that the system resistance is basically unchanged, the power is proportional to the third power of the rotating speed according to the fluid similarity principle, so that the resistance change condition of the smoke tube can be judged according to whether the power ratio and the third power of the rotating speed coefficient are consistent with each other, and an abnormal fault is judged and predicted. If the resistance of the smoke tube and the resistance of the smoke tube are within the deviation range, the resistance of the smoke tube is judged to be basically unchanged, and the smoke tube can be considered to have no leakage; if the two are outside the deviation range and the power ratio is greater than the rotation speed cubic ratio, leakage exists in the system relatively, pressure relief flow is increased due to a pipeline leakage port, the more serious the leakage is, and the larger the overall power is; and if the power ratio is smaller than the rotation speed cubic ratio, the power or current detection module fails.

As shown in fig. 4, the operation monitoring method of the building smoke exhaust system is characterized by comprising the following steps:

1) pressing a corresponding key by a user to wake up or start;

2) selecting whether to enter leakage self-inspection;

3) if not, the valve plate of the check valve is opened;

4) and switching to conventional operation;

5) if yes, operating a leakage self-checking program, and keeping the valve plate closed;

6) default Ti gear operation;

7) reading the full blocking power Pig of the current gear from the built-in storage and calculating the current actual power Pi;

8) judging whether the current Pi is smaller than Pig;

9) if Pi < Pig, prompting that the smoke tube is shriveled and damaged or the smoke tube is deformed, and asking for maintenance;

10) if Pi is larger than or equal to Pig, recording the power Pi and the current corresponding rotating speed ni;

11) judging whether 2 groups of power values and 2 groups of rotating speed values are recorded;

12) if yes, calculating

And

a value of (d);

13) comparing h and s;

14) carrying out interval judgment by using the sizes of h and s;

if h-s is less than or equal to e, judging that the smoke tube has no leakage, and turning to the step 3) to operate;

if h-s is greater than e and h is greater than s, judging that the smoke tube is leaked, and prompting to overhaul;

if h-s is greater than e and h is less than s, judging the fault of the power or current detection module and prompting to overhaul;

wherein e is a preset threshold value;

15) and if 2 groups of pressure and rotating speed values are not recorded in the step 11), increasing the gear to operate, and switching to the step 7) to operate.

Claims (4)

1. The utility model provides a building system of discharging fume, is including installing range hood (1) in the kitchen, range hood (1) has fan (2), and the fan air outlet is linked together through tobacco pipe (3) and public flue (4), and check valve (5) are installed to the exit end of tobacco pipe (3), range hood (1) area current detection module or power detection module, its characterized in that: the smoke pipe leakage detection device further comprises a controller capable of reading the current or power value of the fan and the rotating speed value of the fan, and the controller can judge whether the smoke pipe (3) leaks or not by calculating the deviation between the current or power ratio and the rotating speed cubic ratio of the fan (2) at different gears.

2. A building smoke evacuation system as claimed in claim 1 wherein: the controller calculates the current rotating speed through a counter electromotive force or a rotating speed sensor.

3. A building smoke evacuation system as claimed in claim 1 wherein: and a valve plate control motor (6) for controlling the opening and closing of a valve plate (51) of the check valve (5) is arranged on the smoke pipe (3).

4. A method for monitoring the operation of a building smoke exhaust system as claimed in any one of claims 1 to 3, characterized by comprising the steps of:

1) pressing a corresponding key by a user to wake up or start;

2) selecting whether to enter leakage self-inspection;

3) if not, the valve plate of the check valve is opened;

4) and switching to conventional operation;

5) if yes, operating a leakage self-checking program, and keeping the valve plate closed;

6) default Ti gear operation;

7) reading the full blocking power Pig of the current gear from the built-in storage and calculating the current actual power Pi;

8) judging whether the current Pi is smaller than Pig;

9) if Pi < Pig, prompting that the smoke tube is shriveled and damaged or the smoke tube is deformed, and asking for maintenance;

10) if Pi is larger than or equal to Pig, recording the power Pi and the current corresponding rotating speed ni;

11) judging whether 2 groups of power values and 2 groups of rotating speed values are recorded;

12) if yes, calculating

And

a value of (d);

13) comparing h and s;

14) carrying out interval judgment by using the sizes of h and s;

if h-s is less than or equal to e, judging that the smoke tube has no leakage, and turning to the step 3) to operate;

if h-s is greater than e and h is greater than s, judging that the smoke tube is leaked, and prompting to overhaul;

if h-s is greater than e and h is less than s, judging the fault of the power or current detection module and prompting to overhaul;

15) and if 2 groups of pressure and rotating speed values are not recorded in the step 11), increasing the gear to operate, and switching to the step 7) to operate.

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