Variable air volume double position control valve

Abstract

The present invention discloses a variable air volume two-position regulating valve, comprising: a valve body with an air inlet and an air outlet, a resistance component, a sensing device, a front air volume regulating mechanism, a rear air volume regulating mechanism and a control device, wherein the sensing device, the front air volume regulating mechanism and the rear air volume regulating mechanism are all connected to the control device, and in the small air volume mode, the front air volume regulating mechanism is in a stopped state, and the wind speed and air volume are adjusted by the rear air volume regulating mechanism, and in the large air volume mode, the wind speed and air volume are adjusted by the front air volume regulating mechanism and the rear air volume regulating mechanism respectively. The present invention has two operating modes, namely, a large air volume mode and a small air volume mode, and can adapt to the switching requirements of the working and duty modes of the purification air conditioning system; the resistance component cooperates with the sensing device to realize the accurate measurement of the wind speed and air volume; by adjusting the angle between the front and rear air volume regulating mechanisms and the valve body, a linearly changing resistance can be formed, thereby realizing the linear adjustment of the air volume in each interval.

Description

Technical Field

[0001] The invention belongs to the field of design and manufacture of air valves in HVAC and purification ventilation engineering, and in particular relates to a variable air volume two-position regulating valve. Background Art

[0002] The purification air conditioning system is the most important supporting facility for cleanrooms to maintain production. The control of temperature, humidity, pressure difference and cleanliness of cleanrooms depends on the normal operation of the purification air conditioning system. The air supply volume is a key parameter for the operation of the purification air conditioning system. The accuracy of the air supply volume has the most direct impact on the control of cleanroom temperature, humidity, pressure difference and cleanliness. The air supply volume of the purification air conditioning system is mainly achieved by adjusting the speed of the blower and the opening of the air valve in the ventilation duct, among which the adjustment function of the air valve is crucial.

[0003] There are two main problems with the air volume regulating valves used in existing purification air conditioning systems. First, the air volume regulation of some existing air volume regulating valves is not accurate enough; the main reason is that the regulating mechanism in the air valve has a single function and cannot achieve linear resistance changes according to the air valve opening, resulting in non-linear changes in air volume; in these air valves, the test accuracy of the air volume test device is not high, and the anti-fluctuation and anti-interference capabilities are poor, making it difficult to stably obtain the true wind speed, which makes the air volume adjustment parameter setting in the air valve itself deviate. On the other hand, the structure of some existing air volume regulating valves that can achieve accurate air volume regulation is very complex. These air valves often integrate a large number of wind speed sensors, controllers and a large number of valve plates. The entire air valve is expensive and has a high cost of use. Seeking an air valve with precise air volume control, simple structure and low cost has always been a difficulty that needs to be broken through in the field of purification air conditioning equipment technology research.

[0004] Furthermore, the energy consumption of clean workshops is more than 20 times that of general public buildings, and the energy consumption of purification air conditioning systems accounts for more than 50% of its total energy consumption. The new version of GMP (2010) puts forward more stringent requirements for the production environment of sterile drugs, "the air purification system in the clean area of ​​sterile drug production should maintain continuous operation and maintain the corresponding cleanliness level", which further aggravates the energy consumption of purification air conditioning systems. An important measure to save energy in purification air conditioning systems is to reasonably set the mode switching of system operation according to production needs, that is, to adopt a large air volume working mode during the production period of clean workshops; and to keep the machine running during the non-production period of clean workshops, and switch to a small air volume duty mode. However, the existing air valve products on the market are only capable of accurately adjusting and controlling the air volume in a continuous limited range. To be applicable to the working mode and duty mode of the purification air conditioning system, two air valves with different air volume adjustment ranges must be equipped, which increases the cost of the purification air conditioning system to a certain extent, and increases the difficulty of designing and installing the air system.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a variable air volume two-position regulating valve. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a variable air volume two-position regulating valve to overcome the defects of the air valves used in the existing purification ventilation systems, and to provide a variable air volume two-position regulating valve that can accurately measure the wind speed and air volume and can accurately control the air volume in two different air volume ranges.

[0007] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows:

[0008] A variable air volume two-position regulating valve comprises: a valve body with an air inlet and an air outlet, a resistance component, a sensing device, a front air volume regulating mechanism, a rear air volume regulating mechanism and a control device, wherein the resistance component, the front air volume regulating mechanism and the rear air volume regulating mechanism are sequentially installed in the valve body along the direction from the air inlet to the air outlet, the sensing device, the front air volume regulating mechanism and the rear air volume regulating mechanism are all connected to the control device, the sensing device is used to sense the wind speed and air volume at the air inlet and transmit the sensing signal to the control device, the control device controls the front air volume regulating mechanism and the rear air volume regulating mechanism to operate according to the sensing signal to adjust the wind speed and air volume at the air outlet, in a small air volume mode, the front air volume regulating mechanism is in a stopped action state, in which the wind speed and air volume are adjusted by the rear air volume regulating mechanism, and in a large air volume mode, the wind speed and air volume are adjusted by the front air volume regulating mechanism and the rear air volume regulating mechanism respectively.

[0009] In one embodiment, the front air volume adjustment mechanism includes a first valve plate and a second valve plate which are rotatably installed in the valve body and are controlled by a control device, and the first valve plate and the second valve plate are arranged opposite to each other. The rear air volume adjustment mechanism includes a third valve plate which is rotatably installed in the valve body and is controlled by a control device. In a small air volume mode, the first valve plate and the second valve plate are in a stopped state, and in this stopped state, the opening between the first valve plate and the second valve plate is the smallest. At this time, the size of the angle between the third valve plate and the valve body is changed to adjust the wind speed and air volume. In a large air volume mode, the size of the opening between the first valve plate and the second valve plate, the size of the angle between the first valve plate and the second valve plate and the valve body respectively, and the size of the angle between the third valve plate and the valve body are changed to adjust the wind speed and air volume.

[0010] In one embodiment, the front air volume adjustment mechanism also includes a first driver and a second driver connected to the control device, the first driver is installed on the outer wall of the valve body and the rotating shaft of the first driver extends into the valve body and is installed in cooperation with the first valve plate, the second driver is installed on the outer wall of the valve body and the rotating shaft of the second driver extends into the valve body and is installed in cooperation with the second valve plate, and the rear air volume adjustment mechanism also includes a third driver connected to the control device, the third driver is installed on the outer wall of the valve body and the rotating shaft of the third driver extends into the valve body and is installed in cooperation with the third valve plate.

[0011] In one embodiment, the resistance component includes a body and ventilation holes opened on the body, the body is made of stainless steel material, the number of the ventilation holes is not less than 9, and the ventilation holes are circular.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The variable air volume two-position regulating valve of the present invention has two operating modes: large air volume mode and small air volume mode. It can realize accurate regulation of air volume in two different air volume ranges, and can adapt to the working and duty mode switching requirements of the purification air conditioning system; while the existing variable air volume valve can only realize continuous regulation in a single air volume range, and the air volume adjustment range is limited. When applied to air conditioning systems with mode switching requirements, two variable air volume valves of different specifications need to be selected and used simultaneously.

[0014] The variable air volume two-position regulating air valve can obtain the corresponding wind speed in the air duct simply, quickly and accurately through the resistance component and the wind speed transmitter, and correspond the wind speed to the air volume one by one, so as to realize the accurate measurement of wind speed and air volume; only one wind speed probe is needed in the whole wind speed measuring device, which saves the manufacturing cost; while the existing air valve equipped with wind speed and air volume measurement function has its own wind speed measuring device with poor anti-fluctuation and anti-interference ability, and it is difficult to stably obtain the real wind speed in the air duct, resulting in the inability to accurately obtain and adjust the air volume. At the same time, multiple wind speed measurement points are usually used, and the instrument cost is high.

[0015] The variable air volume two-position regulating valve of the present invention adopts two sets of front and rear air volume regulating mechanisms to work together. No matter in high air volume mode or low air volume mode, a linearly changing resistance can be formed by adjusting the angle between the front and rear air volume regulating mechanisms and the valve body, thereby realizing linear regulation of the air volume in each interval. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a variable air volume two-position regulating valve in one embodiment of the present invention;

[0018] Figure 2 It is a state schematic diagram of a variable air volume two-position regulating valve in a small air volume mode in one embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the front structure of the resistance component in one embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0021] The present invention discloses a variable air volume two-position regulating valve, comprising: a valve body with an air inlet and an air outlet, a resistance component, a sensing device, a front air volume regulating mechanism, a rear air volume regulating mechanism and a control device, wherein the resistance component, the front air volume regulating mechanism and the rear air volume regulating mechanism are sequentially installed in the valve body along the direction from the air inlet to the air outlet, the sensing device, the front air volume regulating mechanism and the rear air volume regulating mechanism are all connected to the control device, the sensing device is used for sensing the wind speed and air volume at the air inlet and transmitting the sensing signal to the control device, the control device controls the front air volume regulating mechanism and the rear air volume regulating mechanism to operate according to the sensing signal so as to adjust the wind speed and air volume at the air outlet, in a small air volume mode, the front air volume regulating mechanism is in a stopped action state, in which the wind speed and air volume are adjusted by the rear air volume regulating mechanism, and in a large air volume mode, the wind speed and air volume are adjusted by the front air volume regulating mechanism and the rear air volume regulating mechanism respectively.

[0022] The present invention is further described below in conjunction with specific embodiments.

[0023] Ginseng Figure 1As shown, a variable air volume two-position regulating valve comprises: a valve body 11 with an air inlet and an air outlet, a resistance component, a sensing device 2, a front air volume regulating mechanism, a rear air volume regulating mechanism and a control device, wherein the resistance component, the front air volume regulating mechanism and the rear air volume regulating mechanism are sequentially installed in the valve body 11 along the direction from the air inlet to the air outlet, the sensing device 2, the front air volume regulating mechanism and the rear air volume regulating mechanism are all connected to the control device, the sensing device 2 is used to sense the wind speed and air volume at the air inlet and transmit the sensing signal to the control device, the control device controls the front air volume regulating mechanism and the rear air volume regulating mechanism to operate according to the sensing signal to adjust the wind speed and air volume at the air outlet, in the small air volume mode, the front air volume regulating mechanism is in a stopped action state, in which the wind speed and air volume are adjusted by the rear air volume regulating mechanism, and in the large air volume mode, the wind speed and air volume are adjusted by the front air volume regulating mechanism and the rear air volume regulating mechanism respectively.

[0024] Ginseng Figure 1 Combined with Figure 3 As shown, the resistance component is installed in the valve body 11, the resistance component is located at the air inlet, the resistance component, the front air volume adjustment mechanism and the rear air volume adjustment mechanism are arranged in sequence along the direction from the air inlet to the air outlet, the resistance component includes a main body 1 and vents 12 opened on the main body 1, the main body 1 is made of stainless steel material, the number of vents 12 is not less than 9, the vents 12 are circular, the vents 12 are distributed in an array, and multiple division areas are formed by dividing the main body 1 by equal area method, the division areas are rectangular, the vents 12 are located at the center of each division area and the diameter of the vents 12 is half of the long side length of the division area, and the division areas and vents 12 formed by equal area division are not less than 9.

[0025] Ginseng Figure 1 As shown, the sensing device 2 is a wind speed transmission device, which consists of a wind speed probe and a transmitter. The sensing device 2 is installed on the outer wall of the valve body 11 and the wind speed probe of the sensing device 2 extends into the valve body 11. The wind speed probe of the sensing device 2 is located on the side of the resistance member 1 away from the air inlet, wherein the transmitter is installed at the bottom of the valve body 11, the wind speed probe extends into the valve body 11 and is located behind the resistance member 1, and the front of the resistance member 1 corresponds to the air inlet. The installation height of the wind speed probe in the valve body 11 is h, and the distance from the resistance member is d. The height h and the distance d are determined to ensure that the wind speed sensed by the wind speed probe is equal to the average wind speed in the valve body 11.

[0026] The resistance component and the wind speed transmitter are calibrated and tested before installation. The size of the resistance component and the size, number and arrangement position of the vents 12 jointly determine the installation height h of the wind speed probe of the wind speed transmitter in the valve body 11 and the distance d from the resistance component. After the calibration test, the wind speed transmitter can accurately obtain the average wind speed passing through the resistance component with only one wind speed probe, and convert it into a wind speed and air volume signal and transmit it to the control device through the data transmission line.

[0027] Ginseng Figure 1 As shown, the front air volume adjustment mechanism includes a first driver 3, a second driver 5, a first valve disc 4 and a second valve disc 6. The first valve disc 4 and the second valve disc 6 are arranged opposite to each other. The first driver 3 is installed on the outer wall of the valve body 11 and the rotating shaft of the first driver 3 extends into the valve body 11 and is installed in cooperation with the first valve disc 4. The second driver 5 is installed on the outer wall of the valve body 11 and the rotating shaft of the second driver 5 extends into the valve body 11 and is installed in cooperation with the second valve disc 6. The angle θ between the first valve disc 4 and the second valve disc 6 and the valve body 11 is adjusted by the corresponding rotating shafts driven by the first driver 3 and the second driver 5 respectively, and the adjustment range of the angle θ is 0 to 180°. In this embodiment, the first valve disc 4 and the second valve disc 6 are distributed up and down, the first driver 3 is installed on the outer wall of the top of the valve body 11, and the second driver 5 is installed on the outer wall of the bottom of the valve body 11.

[0028] Ginseng Figure 1 As shown, the post-air volume adjustment mechanism includes a third driver 7 and a third valve disc 8. The third driver 7 is installed on the outer wall of the valve body 11 and the rotating shaft of the third driver 7 extends into the valve body 11 and is installed in conjunction with the third valve disc 8. The angle θ between the third valve disc 8 and the valve body 11 is adjusted by the rotating shaft driven by the third driver 7. The adjustment range of the angle θ is 0 to 180°. In this embodiment, the third valve disc 8 is located above the inside of the valve body 11, and the third driver 7 is installed on the outer wall at the top of the valve body 11.

[0029] In this embodiment, linear adjustment of the ventilation volume is achieved by controlling the combined data of the corresponding angles θ between the first valve disc 4 , the second valve disc 6 , and the third valve disc 8 and the valve body 11 .

[0030] Ginseng Figure 1As shown, the control device is connected to the sensing device 2, the front air volume regulating mechanism and the rear air volume regulating mechanism respectively, and the control device includes a two-position actuator 9 and a controller 10 connected to each other. The two-position actuator 9 is connected to the front air volume regulating mechanism and the rear air volume regulating mechanism, and the controller 10 is connected to the sensing device 2. The controller 10 receives the sensing signal transmitted by the sensing device 2. The controller 10 is used to transmit the variable air volume instruction to the two-position actuator 9 according to the sensing signal, so as to control the action of the front air volume regulating mechanism and the rear air volume regulating mechanism through the two-position actuator 9. In this embodiment, the two-position actuator 9 and the controller 10 are placed in the same housing and installed on the outer side wall at the bottom of the air outlet end of the valve body 11. The two-position actuator 9 and The controller 10 is connected via a data transmission line, and a data transmission line is connected between the controller 10 and the sensing device 2. After the sensing device 2 obtains the wind speed and air volume data, it transmits the sensing signal to the controller 10. The controller 10 receives the wind speed and air volume data and after comparing with the set value, it outputs a variable air volume instruction to the two-position actuator 9. The first driver 3, the second driver 5 and the third driver 7 are all connected to the two-position actuator 9 via the data transmission line. After the two-position actuator 9 receives the variable air volume instruction issued by the controller 10, it can simultaneously transmit execution instructions to the front group air volume adjustment mechanism and the rear group air volume adjustment mechanism, control the action of each driver, and adjust the angle θ corresponding to each valve plate and the valve body, thereby adjusting the wind speed and air volume.

[0031] The present invention can realize a large air volume mode and a small air volume mode, and its specific implementation method is as follows:

[0032] Ginseng Figure 2 As shown, in the small air volume mode, the front air volume adjustment mechanism stops moving, and the first valve disc 4 and the second valve disc 6 are in a stopped state. At this time, the angle θ between the first valve disc 4 and the second valve disc 6 and the valve body 11 is fixed to 90°, and in this stopped state, the opening between the first valve disc 4 and the second valve disc 6 is the smallest, that is, a fixed channel suitable for the passage of small air volume is reserved. At this time, the size of the opening between the third valve disc 8 and the valve body 11 is changed to adjust the wind speed and air volume. After the controller 10 receives the wind speed and air volume signals transmitted by the sensing device 2, the variable air volume command is transmitted to the two-position actuator 9. The two-position actuator 9 controls the third driver 7 to drive the rotating shaft to realize the adjustment of the angle θ between the third valve disc 8 and the valve body 11 until the wind speed and air volume transmitted to the controller 10 by the sensing device 2 reach the specified value.

[0033] In the high air volume mode, the front air volume regulating mechanism and the rear air volume regulating mechanism operate simultaneously, respectively changing the size of the opening between the first valve disc 4 and the second valve disc 6, the size of the angles between the first valve disc 4 and the second valve disc 6 and the valve body 11, and the size of the angle between the third valve disc 8 and the valve body 11 to adjust the wind speed and air volume. After the controller 10 receives the wind speed and air volume signals transmitted by the sensing device 2, the variable air volume command is transmitted to the two-position actuator 9. The two-position actuator 9 controls the first driver 3, the second driver 5 and the third driver 7 to drive their respective rotating shafts to respectively adjust the angles θ corresponding to the first valve disc 4, the second valve disc 6 and the third valve disc 8 and the valve body 11, until the wind speed and air volume transmitted to the controller 10 by the sensing device 2 reach the specified value.

[0034] It can be seen from the above technical solutions that the present invention has the following beneficial effects:

[0035] The variable air volume two-position regulating valve of the present invention has two operating modes, namely, a large air volume mode and a small air volume mode, and can realize accurate control of the air volume in two different air volume ranges, and can adapt to the working and duty mode switching requirements of the purification air conditioning system.

[0036] The variable air volume two-position regulating valve of the present invention can obtain the corresponding wind speed in the air duct simply, quickly and accurately through the resistance component and the sensing device, and make a one-to-one correspondence between the wind speed and the air volume, thereby realizing accurate measurement of the wind speed and the air volume; only one sensing device is needed in the entire wind speed measuring device, thus saving manufacturing costs.

[0037] The variable air volume two-position regulating valve of the present invention adopts two sets of front and rear air volume regulating mechanisms to work together. No matter in high air volume mode or low air volume mode, a linearly changing resistance can be formed by adjusting the angle between the front and rear air volume regulating mechanisms and the valve body, thereby realizing linear regulation of the air volume in each interval.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A variable air volume two-position regulating valve, characterized in that: include: A valve body with an air inlet and an air outlet, a resistance component, a sensing device, a front air volume regulating mechanism, a rear air volume regulating mechanism and a control device. The resistance component, the front air volume regulating mechanism and the rear air volume regulating mechanism are sequentially installed in the valve body along the direction from the air inlet to the air outlet. The sensing device, the front air volume regulating mechanism and the rear air volume regulating mechanism are all connected to the control device. The sensing device is used for sensing the wind speed and air volume at the air inlet and transmitting the sensing signal to the control device. The control device controls the front air volume regulating mechanism and the rear air volume regulating mechanism to operate according to the sensing signal to adjust the wind speed and air volume at the air outlet. In the small air volume mode, the front air volume regulating mechanism is in a stopped state. In this stopped state, the wind speed and air volume are adjusted by the rear air volume regulating mechanism. In the large air volume mode, the wind speed and air volume are adjusted by the front air volume regulating mechanism and the rear air volume regulating mechanism respectively.

2. The variable air volume two-position regulating valve according to claim 1, characterized in that: The front air volume adjustment mechanism includes a first valve plate and a second valve plate which are rotatably installed in the valve body and are controlled by a control device, and the first valve plate and the second valve plate are arranged opposite to each other. The rear air volume adjustment mechanism includes a third valve plate which is rotatably installed in the valve body and is controlled by a control device. In the small air volume mode, the first valve plate and the second valve plate are in a stopped state, and in this stopped state, the opening between the first valve plate and the second valve plate is the smallest. At this time, the size of the angle between the third valve plate and the valve body is changed to adjust the wind speed and air volume. In the large air volume mode, the size of the opening between the first valve plate and the second valve plate, the size of the angle between the first valve plate and the second valve plate and the valve body respectively, and the size of the angle between the third valve plate and the valve body are changed respectively to adjust the wind speed and air volume.

3. The variable air volume two-position regulating valve according to claim 2, characterized in that: The front air volume adjustment mechanism also includes a first driver and a second driver connected to the control device, the first driver is installed on the outer wall of the valve body and the rotating shaft of the first driver extends into the valve body and is installed in cooperation with the first valve plate, the second driver is installed on the outer wall of the valve body and the rotating shaft of the second driver extends into the valve body and is installed in cooperation with the second valve plate, and the rear air volume adjustment mechanism also includes a third driver connected to the control device, the third driver is installed on the outer wall of the valve body and the rotating shaft of the third driver extends into the valve body and is installed in cooperation with the third valve plate.

4. The variable air volume two-position regulating valve according to claim 1, characterized in that: The control device includes a two-position actuator and a controller connected to each other, the two-position actuator is connected to the front air volume adjustment mechanism and the rear air volume adjustment mechanism, the controller is connected to the sensing device, the controller receives the sensing signal transmitted by the sensing device, and the controller is used to transmit the variable air volume instruction to the two-position actuator according to the sensing signal, thereby controlling the action of the front air volume adjustment mechanism and the rear air volume adjustment mechanism through the two-position actuator.

5. The variable air volume two-position regulating valve according to claim 1, characterized in that: The resistance component includes a body and ventilation holes opened on the body, the body is made of stainless steel material, the number of the ventilation holes is not less than 9, and the ventilation holes are circular.

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