Constant-temperature and constant-humidity air conditioner variable air volume control device for laboratory

Abstract

The utility model discloses a laboratory constant temperature and humidity air conditioner variable air volume control device which comprises an air volume cylinder, a power assembly, a valve plate, a controller and a sensing assembly, the power assembly is fixedly installed on the air volume cylinder, and the valve plate is rotatably installed in the air volume cylinder. Wind exerts pressure on the valve plate, bending of a first rubber interlayer drives a first covering film, a filling layer, a sensitive grid and a second covering film to be bent, bending of the sensitive grid generates electric signals, rotation of a power motor drives a transmission shaft, a power bevel gear, a hollow bevel gear and the valve plate to rotate, and an induction coil induces the angle of a permanent magnet. When the pressure applied to the inclined valve plate by the air is reduced, the bending degree of the sensitive grid is reduced, the electric signal of the sensitive grid is changed, and the throughput of the air passing through the air volume cylinder and the air volume at the upstream end are different, the opening degree of the valve plate is controlled, and the air volume at the downstream end is always kept stable. And recording the throughput of the air volume.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of variable air volume valve, especially to a laboratory constant temperature and humidity air conditioner variable air volume control device. BACKGROUND

[0002] In discussing the technical limitations of existing variable air volume valves, we inevitably encounter a core problem - when the upstream air volume changes, it is difficult to ensure that the downstream air volume remains stable. This challenge not only affects the overall efficiency of the system, but also may have adverse effects on indoor environmental quality, especially in applications where precise control of air volume is required.

[0003] Existing variable air volume valves are typically designed to regulate and control the air flow through air conditioning systems or other ventilation equipment. In theory, these valves should be able to automatically adjust the opening according to environmental needs, thus maintaining a constant air supply. However, in actual application, due to the volatility of upstream air volume and inherent pressure changes within the system, traditional variable air volume valves often fail to meet the expected performance standards.

[0004] Changes in upstream air volume are caused by a variety of factors, including but not limited to external environmental conditions (such as changes in temperature and humidity), changes in building internal load, and the working state of other components within the system (such as fans). The fluctuations in air volume caused by these factors will directly affect the performance of the variable air volume valve. Although traditional variable air volume valves can sense these changes and attempt to make corresponding adjustments, in complex and variable actual environments, their adjustment ability often appears to be inadequate. This means that even if the valve attempts to adapt to new air volume requirements by changing the opening, it is difficult to achieve a smooth transition in a short period of time, thereby causing instability in downstream air volume.

[0005] Existing variable air volume valves are typically designed to focus on performance optimization under single working conditions, while ignoring adaptability under non-ideal conditions. This design approach exposes obvious shortcomings when faced with variable operating environments. For example, in extreme weather conditions or when other components in the system fail, the valve may lose effective control of air volume due to its inability to respond quickly. In addition, many existing variable air volume valves do not fully consider energy efficiency in their design, which leads to the consumption of additional energy even in cases where the upstream air volume changes slightly due to frequent adjustment actions.

[0006] The existing variable air volume valve also has certain difficulties in maintenance and debugging. Since the internal structure of the valve is complex and the precision requirement is high, once a problem occurs, professional technical personnel need to intervene to solve the problem, which undoubtedly increases the maintenance cost. Moreover, for those valves installed in difficult-to-reach positions, daily inspection and repair work becomes extremely inconvenient. These problems not only increase the maintenance burden of users, but also limit the application of variable air volume valves in a wider range.

[0007] Therefore, how to provide a laboratory constant temperature and humidity air conditioning variable air volume control device is a problem that those skilled in the art need to solve. Utility model content

[0008] One purpose of the present application is to provide a laboratory constant temperature and humidity air conditioning variable air volume control device. The present application applies pressure to the valve plate, the bending of the first rubber spacer with the first cover film, the filler layer, the sensitive grid and the second cover film, the bending of the sensitive grid generates an electrical signal, the rotation of the power motor drives the rotation of the transmission shaft, the power bevel gear, the hollow bevel gear and the valve plate, the inductive coil senses the angle of the permanent magnet, to measure the opening degree of the valve plate in the air volume cylinder, the pressure applied by the air to the inclined valve plate is reduced, the bending degree of the first rubber spacer and the sensitive grid is smaller, the electrical signal of the sensitive grid changes, the air passes through the air volume cylinder, when the upstream air volume is different, the opening degree of the valve plate is controlled, the downstream air volume is always stable, and the air volume is recorded.

[0009] According to the laboratory constant temperature and humidity air conditioning variable air volume control device of the present application, the power assembly is fixedly installed on the air volume cylinder, the valve plate is rotatably installed in the air volume cylinder, the controller is fixedly installed on the outer wall of the air volume cylinder, and the induction assembly is fixedly installed on both sides of the valve plate.

[0010] Further, the two ends of the air volume cylinder are fixedly provided with flanges, the outer side of the flange is fixedly provided with a sealing rubber ring, the two ends of the air volume cylinder are fixedly provided with sealing clamping strips, and the two ends of the air volume cylinder are fixedly provided with three sealing rubber strips, and the sealing rubber strips are located in the sealing clamping strips.

[0011] Further, the power assembly includes a power motor, a transmission shaft, a power bevel gear and a hollow bevel gear, wherein the base of the power motor is fixedly installed on the outer wall of the air volume cylinder, one end of the transmission shaft is fixedly installed on the rotating shaft of the power motor, the power bevel gear is fixedly installed on the other end of the transmission shaft, the hollow bevel gear is fixedly installed on the valve shaft of the valve plate, and the hollow bevel gear is engaged with the power bevel gear.

[0012] Furthermore, the valve plate is hollow, and two mounting slots are provided on both sides of the valve plate.

[0013] Furthermore, a display screen is fixedly installed on the top of the controller, and a set of buttons is also fixedly installed on the top of the controller.

[0014] Furthermore, the sensing component includes a first rubber spacer, a strain gauge, and a second rubber spacer, wherein the first rubber spacer is fixedly installed on the inner wall of the mounting groove, the first rubber spacer is fixedly installed on one side of the strain gauge, the strain gauge is fixedly installed on the inner wall of the mounting groove, the second rubber spacer is fixedly installed on the inner wall of the mounting groove, and the second rubber spacer is fixedly installed on the other side of the strain gauge.

[0015] Furthermore, the strain gauge is composed of a first cover film, a filling layer, a sensitive grid, and a second cover film. The first cover film is fixedly installed on one side of the filling layer, the sensitive grid is fixedly installed inside the filling layer, and the second cover film is fixedly installed on the other side of the filling layer.

[0016] Furthermore, the sensing component also includes a sensing disc, a permanent magnet, and an induction coil. The sensing disc is fixedly mounted on the valve shaft of the valve plate, the permanent magnet is fixedly mounted on the edge of the sensing disc, the induction coil is located on both sides of the sensing disc, and the induction coil is fixedly mounted on the outer wall of the air volume cylinder.

[0017] The beneficial effects of this utility model are:

[0018] In this invention, the wind applies pressure to the valve plate. The bending of the first rubber diaphragm causes the first covering film, filling layer, sensitive grid, and second covering film to bend. The bending of the sensitive grid generates an electrical signal. The rotation of the power motor drives the rotation of the transmission shaft, power bevel gear, hollow bevel gear, and valve plate. The induction coil senses the angle of the permanent magnet to measure the opening degree of the valve plate in the air volume cylinder. As the pressure applied by the wind to the inclined valve plate decreases, the bending degree of the first rubber diaphragm and the sensitive grid decreases, and the electrical signal of the sensitive grid changes. The amount of air passing through the air volume cylinder is controlled. When the air volume at the upstream end is inconsistent, the opening degree of the valve plate is controlled to always maintain the stability of the air volume at the downstream end, and the amount of air passing through is recorded. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a laboratory constant temperature and humidity air conditioning variable air volume control device proposed in this utility model.

[0021] Figure 2 A cross-sectional view of the valve plate of the variable air volume control device of the laboratory constant temperature and humidity air conditioner is shown in the utility model;

[0022] Figure 3 A structure schematic view of the sensitive grid of the variable air volume control device of the laboratory constant temperature and humidity air conditioner is shown in the utility model; Figure 2 An enlarged view of A of the variable air volume control device of the laboratory constant temperature and humidity air conditioner is shown in the utility model;

[0023] Figure 4 An enlarged view of B of the variable air volume control device of the laboratory constant temperature and humidity air conditioner is shown in the utility model; Figure 2 A structure schematic view of the sensitive grid of the variable air volume control device of the laboratory constant temperature and humidity air conditioner is shown in the utility model;

[0024] Figure 5 An enlarged view of C of the variable air volume control device of the laboratory constant temperature and humidity air conditioner is shown in the utility model.

[0025] Figure 6 A structure schematic view of the sensitive grid of the variable air volume control device of the laboratory constant temperature and humidity air conditioner is shown in the utility model. Figure 5

[0026] In the drawing: 1, air volume cylinder; 1.1, flange; 1.2, sealing rubber ring; 1.3, sealing clamping strip; 1.4, sealing rubber strip; 2, power assembly; 2.1, power motor; 2.2, transmission shaft; 2.3, power bevel gear; 2.4, hollow bevel gear; 3, valve plate; 3.1, installation groove; 4, controller; 4.1, display screen; 4.2, key group; 5, induction assembly; 5.1, first rubber separation layer; 5.2, strain gauge; 5.3, second rubber separation layer; 5.4, first covering film; 5.5, filling layer; 5.6, sensitive grid; 5.7, second covering film; 5.8, induction circular plate; 5.9, permanent magnet; 5.10, induction coil. DETAILED DESCRIPTION

[0027] The utility model will be explained further in detail now in combination with the drawing. These drawings are all simplified schematic views, and only illustrate the basic structure of the utility model in a schematic way, therefore, it only shows the constitution related to the utility model.

[0028] Please refer to Figures 1 to 6 ​The utility model provides a laboratory constant temperature and humidity air conditioner variable air volume control device, including air volume cylinder 1, power assembly 2, valve plate 3, controller 4 and response subassembly 5, wherein, power assembly 2 is fixedly installed on air volume cylinder 1, valve plate 3 is rotatably installed in air volume cylinder 1, controller 4 is fixedly installed on the outer wall of air volume cylinder 1, response subassembly 5 is fixedly installed on the both sides of valve plate 3, the both ends of air volume cylinder 1 are fixedly provided with flange 1.1, the one side of flange 1.1 towards outside is fixedly provided with sealing rubber ring 1.2, the both ends of air volume cylinder 1 are fixedly provided with sealing clamping strip 1.3, the both ends of air volume cylinder 1 are fixedly provided with three sealing rubber strips 1.4, and sealing rubber strip 1.4 is located in sealing clamping strip 1.3, and sealing rubber ring 1.2 and sealing rubber strip 1.4 are used for sealing between air volume cylinder 1 and the sealing of pipeline outside.

[0029] Specifically, power assembly 2 includes power motor 2.1, transmission shaft 2.2, power bevel gear 2.3 and hollow bevel gear 2.4, wherein, the base of power motor 2.1 is fixedly installed on the outer wall of air volume cylinder 1, one end of transmission shaft 2.2 is fixedly installed on the rotating shaft of power motor 2.1, power bevel gear 2.3 is fixedly installed on the other end of transmission shaft 2.2, hollow bevel gear 2.4 is fixedly installed on the valve shaft of valve plate 3, and hollow bevel gear 2.4 is engaged with power bevel gear 2.3.

[0030] More specifically, valve plate 3 is hollow, two installation grooves 3.1 are formed on the both sides of valve plate 3, the top of controller 4 is fixedly provided with display screen 4.1, and the top of controller 4 is fixedly provided with key group 4.2.

[0031] More specifically, response subassembly 5 includes first rubber spacer 5.1, strain gauge 5.2 and second rubber spacer 5.3, wherein, first rubber spacer 5.1 is fixedly installed on the inner wall of installation groove 3.1, first rubber spacer 5.1 is fixedly installed on one side of strain gauge 5.2, strain gauge 5.2 is fixedly installed on the inner wall of installation groove 3.1, second rubber spacer 5.3 is fixedly installed on the inner wall of installation groove 3.1, and second rubber spacer 5.3 is fixedly installed on the other side of strain gauge 5.2.

[0032] Strain gauge 5.2 is composed of first cover film 5.4, filling layer 5.5, sensitive grid 5.6 and second cover film 5.7, first cover film 5.4 is fixedly installed on one side of filling layer 5.5, sensitive grid 5.6 is fixedly installed in filling layer 5.5, sensitive grid 5.6 detects the degree of bending and converts into electric signal, and second cover film 5.7 is fixedly installed on the other side of filling layer 5.5.

[0033] The induction assembly 5 further comprises an induction disc 5.8, a permanent magnet 5.9 and an induction coil 5.10, wherein the induction disc 5.8 is fixedly installed on the valve shaft of the valve plate 3, the permanent magnet 5.9 is fixedly installed on the edge of the induction disc 5.8, and the induction coil 5.10 is located on both sides of the induction disc 5.8 and is fixedly installed on the outer wall of the air volume cylinder 1.

[0034] Further, the flanges 1.1 at both ends of the air volume cylinder 1 are connected to external pipelines, air passes through the valve plate 3 of the air volume cylinder 1, the valve plate 3 faces the wind, the wind exerts pressure on the valve plate 3, the first rubber layer 5.1 is also subjected to the pressure of the wind, the first rubber layer 5.1 bends inwardly towards the valve plate 3, the bending of the first rubber layer 5.1 bends the first cover film 5.4, the filling layer 5.5, the sensitive grid 5.6 and the second cover film 5.7, the bending of the sensitive grid 5.6 generates an electric signal, the power motor 2.1 is started, the rotation of the power motor 2.1 drives the rotation of the transmission shaft 2.2 and the power bevel gear 2.3, the rotation of the power bevel gear 2.3 drives the rotation of the hollow bevel gear 2.4, the rotation of the hollow bevel gear 2.4 drives the rotation of the valve plate 3, the valve plate 3 opens and closes in the air volume cylinder 1, the rotation shaft of the valve plate 3 drives the rotation of the induction disc 5.8, the rotation of the induction disc 5.8 drives the rotation of the permanent magnet 5.9, the induction coil 5.10 senses the position of the permanent magnet 5.9 to measure the opening and closing degree of the valve plate 3 in the air volume cylinder 1, the opening and closing of the valve plate 3 in the air volume cylinder 1 passes through the air volume, the pressure exerted by the wind on the inclined valve plate 3 decreases, the bending degree of the first rubber layer 5.1 decreases, the bending degree of the corresponding sensitive grid 5.6 decreases, the electric signal of the sensitive grid 5.6 changes to measure the passing volume of the air passing through the air volume cylinder 1.

[0035] I. Calculation principle

[0036] 1. Force on the windward face:

[0037] 1.1. The valve plate 3 will experience a pressure force due to the air flow.

[0038] 1.2. By measuring this pressure, the speed and direction of the airflow can be inferred.

[0039] 2. Opening and closing angle:

[0040] 2.1. The opening and closing angle of the valve plate 3 determines the cross-sectional area of the air flow through the valve plate 3.

[0041] 2.2. The larger the opening and closing angle, the more air flow passes through; conversely, the less air flow passes through.

[0042] 3. Flow calculation formula:

[0043] Under normal circumstances, the air flow through the valve plate 3 can be estimated by the following formula:

[0044] Q = A × v

[0045] Where Q is the flow rate (usually measured in cubic meters per second, m). 3 / s), A is the flow cross-sectional area of ​​valve plate 3 (usually square meters, ㎡), and v is the airflow velocity (usually meters per second, m / s).

[0046] II. Actual Calculation

[0047] 1. Calculation of flow cross-sectional area:

[0048] The opening and closing angle of valve plate 3 determines the flow cross-sectional area A.

[0049] For a circular pipe, the flow cross-sectional area can be calculated using the following formula:

[0050] A=πr 2 ×sin(θ)

[0051] Where r is the pipe radius and θ is the valve plate opening angle (the angle needs to be converted to radians).

[0052] 2. Calculation of airflow velocity:

[0053] Airflow velocity can be measured using devices such as pressure sensors and anemometers.

[0054] Airflow velocity can also be calculated using the force exerted by the windward side and air density:

[0055]

[0056] Where F is the force exerted on the windward side, and ρ is the air density (typically about 1.225 kg / m³ under standard conditions). 3 ), C d is the resistance coefficient of valve plate 3, and A is the area of ​​the windward side.

[0057] 3. Drag coefficient C d :

[0058] The resistance coefficient depends on factors such as the shape and surface roughness of the valve plate 3, and usually needs to be determined experimentally.

[0059] To simplify calculations, a reasonable C can be assumed. d Values, for example, from 0.5 to 1.0.

[0060] III. Example Calculation:

[0061] Suppose we have a circular pipe with a radius of r = 0.5 m, a valve plate 3 with an opening angle of θ = 45° (approximately 0.785 rad), a windward force of F = 50 N, and an air density of ρ = 1.225 kg / m³. 3, let the resistance coefficient C d =0.6.

[0062] 1, the flow area:

[0063] A=πr 2 ×sin(θ)=π(0.5) 2 ×sin(0.785)≈0.615m 2

[0064] 2, the air velocity:

[0065]

[0066] Rearrangement:

[0067]

[0068] 3, the air flow:

[0069] Q=A×v≈0.615×10.3≈6.34m 3 / s

[0070] The above, only for the preferred specific embodiments of the present application, but the scope of the present application is not limited to this, any skilled in the art of the technical range disclosed by the present application, according to the technical scheme of the present application and the utility model concept of the present application to replace or change, should be covered within the scope of the present application.

Claims

1. A constant temperature and humidity air conditioning variable air volume control device for a laboratory, characterized by, Including the wind volume cylinder (1), power assembly (2), valve plate (3), controller (4) and induction assembly (5), wherein the power assembly (2) is fixedly installed on the wind volume cylinder (1), the valve plate (3) is rotatably installed in the wind volume cylinder (1), the controller (4) is fixedly installed on the outer wall of the wind volume cylinder (1), and the induction assembly (5) is fixedly installed on both sides of the valve plate (3).

2. The laboratory constant temperature and humidity air conditioning variable air volume control device according to claim 1, characterized in that, Both ends of the wind volume cylinder (1) are fixedly provided with flanges (1.1), one side of the flange (1.1) is fixedly provided with a sealing rubber ring (1.2), both ends of the wind volume cylinder (1) are fixedly provided with a sealing clamping strip (1.3), both ends of the wind volume cylinder (1) are fixedly provided with three sealing rubber strips (1.4), and the sealing rubber strip (1.4) is located in the sealing clamping strip (1.3).

3. The laboratory constant temperature and humidity air conditioning variable air volume control device according to claim 1, characterized in that, The power assembly (2) includes a power motor (2.1), a transmission shaft (2.2), a power bevel gear (2.3) and a hollow bevel gear (2.4), wherein the base of the power motor (2.1) is fixedly installed on the outer wall of the wind volume cylinder (1), one end of the transmission shaft (2.2) is fixedly installed on the rotating shaft of the power motor (2.1), the power bevel gear (2.3) is fixedly installed on the other end of the transmission shaft (2.2), the hollow bevel gear (2.4) is fixedly installed on the valve shaft of the valve plate (3), and the hollow bevel gear (2.4) is engaged with the power bevel gear (2.3).

4. The laboratory constant temperature and humidity air conditioning variable air volume control device according to claim 1, characterized in that, The valve plate (3) is hollow, and two installation grooves (3.1) are formed in the two sides of the valve plate (3).

5. The laboratory constant temperature and humidity air conditioning variable air volume control device according to claim 1, characterized in that, The top of the controller (4) is fixedly provided with a display screen (4.1), and the top of the controller (4) is fixedly provided with a key group (4.2).

6. The laboratory constant temperature and humidity air conditioning variable air volume control device according to claim 1, characterized in that, The induction assembly (5) includes a first rubber spacer (5.1), a strain sheet (5.2) and a second rubber spacer (5.3), wherein the first rubber spacer (5.1) is fixedly installed on the inner wall of the installation groove (3.1), the first rubber spacer (5.1) is fixedly installed on one side of the strain sheet (5.2), the strain sheet (5.2) is fixedly installed on the inner wall of the installation groove (3.1), the second rubber spacer (5.3) is fixedly installed on the inner wall of the installation groove (3.1), and the second rubber spacer (5.3) is fixedly installed on the other side of the strain sheet (5.2).

7. The laboratory constant temperature and humidity air conditioning variable air volume control device according to claim 6, characterized in that, The strain sheet (5.2) is composed of a first cover film (5.4), a filling layer (5.5), a sensitive grid (5.6) and a second cover film (5.7), the first cover film (5.4) is fixedly installed on one side of the filling layer (5.5), the sensitive grid (5.6) is fixedly installed in the filling layer (5.5), and the second cover film (5.7) is fixedly installed on the other side of the filling layer (5.5).

8. The laboratory constant temperature and humidity air conditioning variable air volume control device according to claim 1, characterized in that, The induction assembly (5) further comprises an induction disc (5.8), a permanent magnet (5.9) and an induction coil (5.10), wherein the induction disc (5.8) is fixedly installed on the valve shaft of the valve plate (3), the permanent magnet (5.9) is fixedly installed on the edge of the induction disc (5.8), and the induction coil (5.10) is located on both sides of the induction disc (5.8) and is fixedly installed on the outer wall of the air volume cylinder (1).

Images