Air mixer

Abstract

The utility model provides air mixer, set up on the baffle in static pressure case, has set up the connecting port on the baffle, and air mixer includes: mixing subassembly and damper subassembly, mixing subassembly is located the inside of first box body, and mixing subassembly is installed on the baffle and cover is located at the connecting port position, damper subassembly is located the inside of second box body, and damper subassembly is installed on the baffle, and cover is located at the connecting port position, and damper subassembly can slide between the opening position and the closed position along the first direction, the first direction is parallel to the plane where the baffle is, adopt the equipment of the utility model, can realize the side slide type opening and closing of damper, can set up the damper on the intercommunication of first box body and second box body under the condition of not changing the original equipment, has solved the defect that the present damper removes and needs larger longitudinal space.

Description

Technical Field

[0001] This utility model relates to the field of experimental device technology, and more specifically, to air mixers. Background Technology

[0002] In existing technologies, the indoor air enthalpy method (or simply "enthalpy method") is an experimental method used to measure the cooling / heating performance of air conditioners or heat pump systems, particularly one of the standard methods for measuring their cooling or heating capacity (i.e., output heat). By measuring the change in air mass flow rate and enthalpy value of the air flowing through the indoor unit of the air conditioner, the cooling or heating capacity of the air conditioning equipment can be calculated.

[0003] During seasonal energy efficiency ratio (ESR) testing, intermittent testing is required to evaluate the part load factor of the tested air conditioner. The American standard AHRI Standard 210 / 240-2023 requires that the airflow path between the tested unit and the outlet air temperature sampling point be blocked when the indoor unit fan stops operating. Under the new standard, the traditional air mixer structure within the plenum chamber is no longer suitable. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a new type of air mixer to overcome the above-mentioned disadvantages.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an air mixer is disposed inside a static pressure chamber, the static pressure chamber being provided with a partition, the partition dividing the static pressure chamber into a first chamber and a second chamber, the partition having a connection port, the first chamber being connected to the second chamber through the connection port; the first chamber being connected to the air outlet of the tested machine, and the second chamber having an exhaust port; inside the static pressure chamber, along the gas flow direction, are sequentially arranged: a mixing component, a thermocouple grid, a damper assembly, and an air sampler assembly; the mixing component is located inside the first chamber, the mixing component is mounted on the partition and covers the connection port; the damper assembly is mounted on the partition and covers the connection port, the damper assembly can slide between an open position and a closed position along a first direction, when the damper assembly is in the open position, the first chamber and the second chamber are connected through the connection port; when the damper assembly is in the closed position, the first chamber and the second chamber are blocked; the first direction is parallel to the plane of the partition.

[0006] In one embodiment, the damper assembly specifically includes: a door panel for closing the connection port, the door panel being movable between an open position and a closed position, wherein when the door panel is in the closed position, the door panel covers the connection port, and the first housing and the second housing are blocked; and when the door panel is in the open position, the first housing and the second housing are connected through the connection port.

[0007] In one embodiment, the damper assembly further includes a drive assembly for driving the door panel to slide between an open position and a closed position along the first direction, wherein the drive end of the drive assembly is fixedly connected to the door panel.

[0008] In one embodiment, the mixing assembly includes mixer blades and a mixer frame; the mixer frame is fixedly connected to the partition, the windward side of the mixer frame is provided with a closed plate, and the air outlet side of the mixer frame is open and connected to the connection port; the mixer blades are evenly distributed around the connection port.

[0009] In one embodiment, the windward side of the mixer blades is fixedly connected to the mixer frame.

[0010] In one embodiment, the width of the mixer blades is between 30-50cm, the angle between the extension direction of the mixer blades and the edge of the connection port is between 45° and 75°, and the distribution spacing between the mixer blades is not greater than twice the width of the blades projected onto the connection port.

[0011] In one embodiment, in a first direction, the outer edge of the closure plate is greater than or equal to the outer envelope of the mixer blade, and the outer edge of the connection port is less than or equal to the inner envelope of the mixer blade.

[0012] In summary, the present invention has the following beneficial effects: the air mixer, using the device of the present invention, can realize the side-sliding opening and closing of the damper, and can set the damper on the connection between the first and second housings without changing the original device, thus solving the defect of existing dampers requiring a large space. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the experimental device for the wind tunnel indoor air enthalpy method of this utility model; Figure 2 This is a three-dimensional structural diagram of the air mixer of this utility model; Figure 3 This is an exploded view of the internal structure of the air mixer of this utility model; In the figure: 1. Static pressure box; 11. First box body; 12. Second box body; 13. Sampler; 14. Partition plate; 15. Connection port; 5. Mixing assembly; 501. Mixer blades; 502. Mixer frame; 503. Sealing plate; 7. Damper assembly; 701. Door panel; 702. Drive assembly; 703. Insert plate; 704. Folding plate; 705. First drive unit; 706. Second drive unit; 707. Sealing plate. Detailed Implementation

[0014] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0015] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. The terms "vertical," "horizontal," "left," "right," "above," "below," and similar expressions are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Example 1 First, the application device of this equipment will be explained: a wind tunnel-type indoor air enthalpy method test device. The principle of the device is as follows: Figure 1As shown, the static pressure chamber 1 is made of heat-insulating material. The partition 14 inside the static pressure chamber 1 divides the static pressure chamber 1 into a first chamber 11 and a second chamber 12. The connection port 15 on the partition 14 is used to connect the first chamber 11 and the second chamber 12. The air outlet of the tested machine is connected to the first chamber 11 and delivers cold air to the first chamber 11. The cold air in the first chamber 11 passes through the mixing component 5, the connection port 15 and the damper component 7 in sequence, and then enters the second chamber 12 and comes into contact with the sampler 13. The sampler 13 is specifically an air sampling fork. After sampling through the sampler 13, the temperature and humidity of the sample are measured to determine the air enthalpy value. Finally, the heating and / or cooling capacity of the air conditioner is calculated.

[0018] The calculation process for cooling capacity is briefly described below:

[0019] in, It represents the air mass flow rate, which is calculated from the air volume measurement device and the air density. This indicates the enthalpy value of the incoming air. The enthalpy of the air being expelled is calculated by measuring the dry-bulb and wet-bulb temperatures. Indicates cooling capacity or heating capacity.

[0020] As can be seen from the above process, by measuring the dry-bulb and wet-bulb temperatures and the air mass flow rate, the cooling capacity can be calculated, and the cooling ability of the air conditioner can be evaluated.

[0021] Specifically, to measure the cooling capacity of the tested machine, a mixing component 5 and a damper component 7 are installed at the connection port 15 between the first chamber 11 and the second chamber 12. The mixing component, through its structural design, forces the air in the first chamber to undergo multiple changes in flow direction and speed, ensuring thorough mixing of the various components before it enters the second chamber for sampling. This eliminates temperature stratification and improves measurement accuracy. The damper component 7 controls the opening and closing of the connection port 15 between the first chamber 11 and the second chamber 12. When the damper component 7 is in the closed position, it completely blocks the connection port 15, completely isolating the first chamber 11 and the second chamber 12 and preventing external air from affecting the first chamber 11. To address the issue of limited space for the damper component 7 to move, in this embodiment, the movement direction of the damper component is set as a first direction, parallel to the plane of the partition. This means the damper component can perform translational movement parallel to the partition, preventing the sampler from affecting the damper's movement space. Specifically, the first direction can be any direction on the plane, for example... Figure 2 The A1A2 direction or the B1B2 direction.

[0022] like Figure 2 , Figure 3 The diagram shows the specific structure of the damper assembly 7. The damper assembly 7 includes a door panel 701, which is parallel to the partition and can slide along a first direction. In this embodiment, the A1A2 direction is taken as the first direction. When the door panel 701 covers the connection port, it can completely cover the connection port to prevent air from entering the sampler 13. When the door panel 701 moves in the A1 direction, the connection port is exposed, and the cold air output by the air conditioner mixes and enters the static pressure box 1.

[0023] The door panel 701 is sliding. To drive the door panel 701 to slide, a drive assembly 702 is also provided on the partition. The drive end of the drive assembly 702 drives the door panel 701 to move linearly. The moving distance of the door panel 701 is matched with the stroke of the drive end of the drive assembly 702. When the drive end travels to the maximum position, the door panel 701 is in the open position, and when the drive end travels to the minimum position, the door panel 701 is in the closed position.

[0024] To improve the strength of the door panel 701 and the connection strength between it and the drive assembly 702, the door panel 701 includes an insert plate 703 and a folding plate 704. The insert plate 703 is used to cover the connection port to achieve a sealing effect. The folding plate 704 is located at the first edge of the insert plate 703 and is formed by folding along a third direction. The L-shaped structure increases the strength of the door panel 701. The drive end of the drive assembly 702 can be directly connected to the folding plate 704, increasing the connection stability between the folding plate 704 and the drive assembly 702.

[0025] To ensure a tight seal between the door panel 701 and the connection opening, a sealing plate 707 is provided. The sealing plate 707 is made of rubber and is U-shaped, surrounding the second, third, and fourth edges of the connection opening. When the insert plate 703 is placed on the connection opening, its second, third, and fourth edges contact the edges of the sealing plate 707 to form a seal. To prevent the door panel 701 from tilting or tipping over, a clamping plate is also provided. This clamping plate covers the sealing plate 707 and surrounds the connection opening. Because the sealing plate 707 has a certain thickness, and this thickness is close to that of the door panel 701, the clamping plate, after being placed on the sealing plate 707, forms a sliding groove with a lateral opening between itself and the partition, allowing the insert plate 703 to slide within the groove and preventing the door panel 701 from moving beyond its degrees of freedom. The folding plate 704 can extend from the side opening. When the door panel 701 is in the closed position, the insert plate 703 is located inside the slide groove. The folding plate 704 abuts against the side opening. When the door panel 701 moves to the open position, the door panel 701 moves away from the slide groove from the side opening.

[0026] To improve the stability of the door panel 701's movement, the drive assembly 702 includes a first drive unit 705 and a second drive unit 706. The first drive unit 705 and the second drive unit 706 are fixed to the upper and lower edges of the connection port. The drive end of the first drive unit 705 is connected to the top of the folding plate 704; the drive end of the second drive unit 706 is fixedly connected to the bottom of the folding plate 704. In this embodiment, both the first drive unit 705 and the second drive unit 706 are cylinders. When the drive end of the cylinder extends outward, the door panel 701 is in the open position; when the drive end of the cylinder retracts inward, the door panel 701 is in the closed position. Since the height of the door panel 701 is close to the height of the connection port, but the first drive unit 705 and the second drive unit 706 are located on the upper and lower sides of the connection port, the folding plate 704 on the door panel 701 needs to be longer than the length of the insert plate 703 in the direction of gravity to ensure that the drive ends of the first drive unit 705 and the second drive unit 706 are horizontally connected to the folding plate 704.

[0027] The mixing assembly 5 is positioned upstream of the airflow direction. The mixing assembly 5 is fixedly mounted on the partition plate. The mixer includes a mixer frame 502 and mixer blades 501. The mixer blades 501 are arranged around the connection port, allowing air to enter from all sides. The mixer frame 502 secures the mixer blades 501 to the partition plate and closes the other end of the mixer blades 501, ensuring air can only enter the connection port from all sides. To improve gas mixing efficiency, the mixer blades 501 have two or more layers. Adjacent mixer blades are tilted in opposite directions to further enhance air mixing efficiency.

[0028] Furthermore, since the mixer blades 501 are arranged around the connection port, they will affect the wind speed of the equipment. In some measurement scenarios, it is necessary to specify a wind speed range between 1 m / s and 12 m / s. Wind speed = air volume / windward envelope area. Therefore, the thickness of the mixer blades along the C1C2 direction and the length of the mixer blades surrounding the connection port will affect the windward envelope area. Preferably, in this embodiment, the perimeter of the mixer is between 20 cm and 300 cm, and the thickness of the mixer blades in the C1C2 direction is between 30 and 50 cm.

[0029] like Figure 3As shown, the mixing assembly includes mixer blades 501 and a mixer frame 502. The mixer frame 502 is fixedly connected to the partition plate. A sealing plate 503 is provided on the windward side of the mixer frame 502, and the air outlet side of the mixer frame 502 is open and connected to the connection port. The mixer blades 501 are evenly distributed around the connection port. The windward side of the mixer blades 501 is fixedly connected to the mixer frame 502. The width of the mixer blades 501 is between 30-50 cm. The angle between the extension direction of the mixer blades 501 and the edge line of the connection port is between 45° and 75°. The distribution spacing between the mixer blades 501 is not greater than twice the projected width of the blades on the connection port. In a first direction, the outer edge of the sealing plate is greater than or equal to the outer envelope of the mixer blades 501, and the outer edge of the connection port is less than or equal to the inner envelope of the mixer blades 501. The first direction is specifically the axial direction of the mixer, i.e., the C1C2 direction. By characterizing the structure of the closed plate, the angle of the mixing blades, and the spacing of the distribution, the mixing performance of the mixer is improved, and the uniformity of dry and wet bulb temperature sampling is enhanced.

[0030] In some cases, standards require the temperature sensor to be placed between the mixer and the damper assembly. Therefore, the order of the components is: mixing assembly, sensor array, damper assembly, and sampler, to meet the testing requirements of various standards.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An air mixer is installed inside a static pressure chamber. The static pressure chamber is equipped with a partition that divides the static pressure chamber into a first chamber and a second chamber. A connection port is provided on the partition. The first chamber is connected to the second chamber through the connection port. The first chamber is connected to the air outlet of the test machine, and the second chamber is provided with an exhaust port. Its features are, Inside the static pressure chamber, along the gas flow direction, are arranged in sequence: a mixing assembly, a thermocouple grid, a damper assembly, and an air sampler assembly; The mixing component is located inside the first housing, and is mounted on the partition and covers the connection port. The damper assembly is mounted on the partition and covers the connection port. The damper assembly can slide between an open position and a closed position along a first direction. When the damper assembly is in the open position, the first housing and the second housing are connected through the connection port. When the damper assembly is in the closed position, the first housing and the second housing are blocked. The first direction is parallel to the plane of the partition.

2. The air mixer according to claim 1, characterized in that, The damper assembly specifically includes: A door panel is used to close the connection port. The door panel is movable between an open position and a closed position. When the door panel is in the closed position, the door panel covers the connection port, blocking the first box and the second box. When the door panel is in the open position, the first box and the second box are connected through the connection port.

3. The air mixer according to claim 2, characterized in that, The damper assembly further includes a drive assembly for driving the door panel to slide between an open position and a closed position along the first direction, wherein the drive end of the drive assembly is fixedly connected to the door panel.

4. The air mixer according to claim 1, characterized in that, The mixing assembly includes mixer blades and a mixer frame; the mixer frame is fixedly connected to the partition, the windward side of the mixer frame is provided with a closed plate, and the air outlet side of the mixer frame is open and connected to the connection port; the mixer blades are evenly distributed around the connection port.

5. The air mixer according to claim 4, characterized in that, The windward side of the mixer blades is fixedly connected to the mixer frame.

6. The air mixer according to claim 5, characterized in that, The width of the mixer blades is between 30-50cm, the angle between the extension direction of the mixer blades and the edge of the connection port is between 45° and 75°, and the distribution spacing between the mixer blades is no greater than twice the width of the blades projected onto the connection port.

7. The air mixer according to claim 6, characterized in that, In the first direction, the outer edge of the sealing plate is greater than or equal to the outer envelope of the mixer blade, and the outer edge of the connection port is less than or equal to the inner envelope of the mixer blade.

Images