CN2775524Y - Fixed air fan box - Google Patents

Abstract

The utility model discloses an air flow regulating device, which is aimed to provide a fixed air flow fan box with automatic constant control of output air flow, which is used for an air system. The fixed air flow fan box of the utility model comprises a box body, a fan, a motor, an air inlet and an air outlet. A mechanical self-operated air flow automatic controlling valve which can regulate the input air flow is arranged on the air inlet. The mechanical self-operated air flow automatic controlling valve in the utility model uses a high-precision stainless steel nonlinear bending spring as a main working element, the service life is longer than an air bag and the control precision is high. Double symmetrical light valve plates of a controlling valve which is arranged on the fan box use structures with a gradually enlarged flow direction, and the interior air flow organization of the airflow organization is reasonable. The utility model has the advantages of simple structure, easy fabrication and low integral cost.

Description

Decide the air quantity air box

Technical field

The utility model relates to a kind of volume adjusting apparatus.More particularly, the utility model relate to a kind of be used for air system have discharge quantity of fan automatic constant control decide the air quantity air box.

Background technology

All relate to the requirement that air box is had constant wind quantity in a large amount of air engineering systems, the air box air quantity of deciding air quantity air current composition, most of new blower fan group, air quantity variable air conditioner unit of technological requirement also requires automatic constant on for example constant current amount of air-conditioning system air-supply, the industrial production line.

The air quantity technology of deciding of present known air box generally adopts air box to carry in the pipeline of air correspondence gas flow sensor is set, intelligent controller and air control valve are formed the complicated and expensive automatic air quantity control system of a cover, there has been mechanical self-operated type to decide the air quantity valve abroad, this import is decided the air quantity valve and is adopted complicated gasbag-type principle and center line single valve plate structure, and be furnished with mechanical cam mechanism and form, this gasbag-type is decided blast regulator following shortcoming: mechanism's complexity, cost an arm and a leg, air current composition is unreasonable, and air bag is easily because of tired out of control, service life is short, higher to the straight length installation requirement in the pipe-line system, otherwise can influence control accuracy.The air quantity valve of deciding of present this mechanical self-operated type also is not used in combination with air box.

At present knownly do not find also to have that mechanical self-operated type discharge quantity of fan controls function automatically decides the air quantity air box.

Summary of the invention

Main purpose of the present utility model is to overcome deficiency of the prior art, provide a kind of be used for air system have discharge quantity of fan automatic constant control decide the air quantity air box.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model provides a kind of air quantity air box of deciding, and comprises casing 100, blower fan 104, motor 105, air inlet 101 and air outlet 102, it is characterized in that, described air inlet 101 places are equipped with the control air-valve 103 that can regulate intake.

Air inlet 101 described in the utility model and air outlet 105 can be installed on any one panel of casing.

The motor 105 that connects blower fan 104 also is installed in the casing 100 described in the utility model.

Blower fan 104 described in the utility model can be two or a plurality of being installed in parallel.

Air-valve 103 described in the utility model can be two or more being installed in parallel.

In the casing 100 described in the utility model muffler can also be installed.

The air-valve 103 that can regulate intake described in the utility model is mechanical self-operated type air mass flow autocontrol valves, comprise control valve valve body 1, it is characterized in that valve inner has following symmetrical structure: both sides respectively have a lightweight valve plate 6 to be installed on the control valve valve body 1 by hinge 4 is installed; Respectively there is a flexural spring 2 to be installed on the control valve valve body 1, and is being pressed on after the initial deformation on lightweight valve plate 6 one sides; Respectively there is a guiding mechanism 5 that is fixed on the control valve valve body 1 to withstand the another side of lightweight valve plate 6, can changes the initial position of lightweight valve plate 6; Control valve valve body 1 middle part is provided with the pin 7 in restriction lightweight valve plate 6 final positions.

The exit of control valve valve body 1 described in the utility model also is provided with the deflector 3 of some adjustment air flow states.

Compared with prior art, the beneficial effects of the utility model are:

By having installed a mechanical self-operated type air mass flow autocontrol valve additional, guarantee that in the pressure head scope of general low-voltage blower fan the air mass flow of air box output is controlled at steady state value automatically at the inner air inlet place that connects of air box.

It is the groundwork element that mechanical self-operated type air mass flow autocontrol valve in the utility model adopts high accuracy stainless steel Nonlinear Bending spring, service life is longer than air bag, control accuracy is also higher, the symmetrical lightweight bivalve plate that is installed in the control valve in the air box adopts the structure that flows to by expanding, and that internal gas flow is organized is more reasonable, apparatus structure is simple, easily manufactured, overall cost is very low.

Description of drawings

Fig. 1 is the box inner structure schematic diagram of embodiment 1 of the present utility model;

Fig. 2 be among Fig. 1 casing B to the panel construction schematic diagram;

Fig. 3 is the left view of box inner structure among Fig. 1;

Fig. 4 is the structural representation of mechanical self-operated type air mass flow autocontrol valve.

The specific embodiment

With reference to figures 1 through 4, will be described in detail the utility model below.

Specific embodiment 1 provides a kind of air quantity air box of deciding, and comprises casing 100, blower fan 104, air inlet 101 and air outlet 102, and air inlet 101 can be installed on two relative panels of casing with air outlet 102.The motor 105 that connects blower fan 104 also is installed in the casing 100.Motor 105 connects with blower fan 104 by associated mode, and integral installation is in casing 100, and fan outlet connects the air-supply air outlet 102 of air box by the head that is flexible coupling.

Air inlet 101 places are equipped with the air-valve 103 that can regulate intake.Air-valve 103 is mechanical self-operated type air mass flow autocontrol valves, comprises control valve valve body 1, it is characterized in that valve inner has following symmetrical structure: both sides respectively have a lightweight valve plate 6 to be installed on the control valve valve body 1 by hinge 4 is installed; Respectively there is a flexural spring 2 to be installed on the control valve valve body 1, and is being pressed on after the initial deformation on lightweight valve plate 6 one sides; Respectively there is a guiding mechanism 5 that is fixed on the control valve valve body 1 to withstand the another side of lightweight valve plate 6, can changes the initial position of lightweight valve plate 6; Control valve valve body 1 middle part is provided with the pin 7 in restriction lightweight valve plate 6 final positions.The exit of control valve valve body 1 also is provided with the deflector 3 of some adjustment air flow states.

The technological principle that its technical problem that solves the utility model adopts is:

When the blower fan of deciding the air quantity air box is opened operation, 6 one precompressed moment of the lightweight valve plate M1 that the flexural spring 2 of automatic control flow valve is given in the control valve valve body 1, make lightweight valve plate 6 rest on initial position by guiding mechanism 5, this initial position can utilize guiding mechanism 5 to preestablish adjustment.When the airflow passes control valve, lightweight valve plate 6 both sides produce pressure drop Δ P, and pressure drop Δ P makes air-flow give lightweight valve plate 6 rightabout moment M2 to 6 one of generation of lightweight valve plate and flexural spring 2.When air-flow acted on enhancing to lightweight valve plate 6, pressure drop Δ P also increased thereupon, and M2 also increases.As M2 during greater than M1, lightweight valve plate 6 is to the closing direction action, and flexural spring 2 also increases to M3 for lightweight valve plate 6 moments, reaches the balance of moment at last, makes valve plate rest on a new position, this moment M2=M3.Because lightweight valve plate 6 is to the closing direction action, the flow area A of control valve reduces, and the resistance coefficient ζ of control valve is strengthened.

If represent the position of lightweight valve plate 6 with lightweight valve plate 6 and the folded angle θ in side of control valve valve body 1, M3 is expressed as the function of θ:

M3＝M3(θ)

M2 also can be expressed as the function of θ and Δ P:

M2＝M2(θ，ΔP)

When equalising torque:

M3＝M2

Δ P is just about the function of θ like this:

ΔP＝ΔP(θ)

Dimensionless resistance coefficient ζ also can be expressed as the function that the function of θ: ζ=ζ (θ) flow area A also can be expressed as θ: A=A (θ) supposes atmospheric density ρ, by can the flow through air quantity Q of control valve of fluid mechanics equation:

$Q=A\×\sqrt{\frac{2\mathrm{\ΔP}}{\mathrm{\ρ\ζ}}}=A\left(\mathrm{\θ}\right)\×\sqrt{\frac{2\mathrm{\ΔP}\left(\text{\θ}\right)}{\text{\ρ\·\ζ}\left(\mathrm{\θ}\right)}}=\mathrm{const}$

Utilize high-precision Nonlinear Bending spring to set up rational mathematical simulation relation, keep air quantity Q to become irrelevant constant at last, thereby in the pressure head scope of general low-voltage blower fan, the discharge quantity of fan of air box is an automatic constant with θ.

At last, it is also to be noted that what more than enumerate only is specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.

As further improvement of the utility model, the blower fan form can be adjusted flexibly as required, our legend is 180 ° of air-out, also can be adjusted into 0 ° of air-out (air outlet moves down), 90 ° of air-out (air outlet is placed on the top panel of casing), 270 ° of air-out (air outlet is placed on the bottom panel of casing).

As further improvement of the utility model, the position of air inlet can be placed on arbitrarily on the different panels even air inlet and air outlet be arranged on the same panel and also be fine as required, as long as bulk allows.

As further improvement of the utility model, the blower fan of box house can adopt two air supply modes in parallel, automatic control flow valve can adopt two or more parallel form combinations as required, and box house can also increase silencer to reduce the air-supply noise.

All distortion or combination that those of ordinary skill in the art can both directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.

Claims (8)

1, a kind ofly decides the air quantity air box, comprise casing (100), blower fan (104), air inlet (101) and air outlet (102), it is characterized in that described air inlet (101) locates to be equipped with the air-valve (103) that can regulate intake.

2, according to claim 1ly decide the air quantity air box, it is characterized in that described air inlet (101) and air outlet (102) can be installed on any one panel of casing.

3, according to claim 1ly decide the air quantity air box, it is characterized in that, the motor (105) that connects blower fan (104) also is installed in the described casing (100).

4, according to claim 1ly decide the air quantity air box, it is characterized in that described blower fan (104) can be two or a plurality of being installed in parallel.

5, according to claim 1ly decide the air quantity air box, it is characterized in that described air-valve (103) can be two or more being installed in parallel.

6, according to claim 1ly decide the air quantity air box, it is characterized in that, in the described casing (100) muffler can also be installed.

7, decide the air quantity air box according to right 1 is described, it is characterized in that, the described air-valve (103) that can regulate intake is a mechanical self-operated type air mass flow autocontrol valve, comprise control valve valve body (1), it is characterized in that valve inner has following symmetrical structure: both sides respectively have a lightweight valve plate (6) to be installed on the control valve valve body (1) by hinge (4) is installed; Respectively there is an original text precision flexural spring (2) to be installed on the control valve valve body (1), and is being pressed on after the initial deformation on lightweight valve plate (6) one side; Respectively there is a guiding mechanism (5) that is fixed on the control valve valve body (1) to withstand the another side of lightweight valve plate (6), can changes the initial position of lightweight valve plate (6); Control valve valve body (1) middle part is provided with the pin (7) in restriction lightweight valve plate (a 6) final position.

8, according to claim 7ly decide the air quantity air box, it is characterized in that the exit of described control valve valve body (1) also is provided with the deflector (3) of some adjustment air flow states.

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