An air conditioning device based on synthetic jets

Abstract

The present invention belongs to the field of air conditioning devices, and particularly relates to an air conditioning device based on synthetic jet, which comprises two air guide plates and at least one synthetic jet actuator. The two air guide plates are symmetrically arranged. The air guide plate comprises a straight surface air inlet section and a curved surface air outlet section. The cavity between the two straight surface air inlet sections forms an air inlet area. The two curved surface air outlet sections are curved towards the side away from each other, and the cavity between the two curved surface air outlet sections forms an air outlet area. The synthetic jet actuator is arranged in the air inlet area, and the two outlets of the synthetic jet actuator are arranged towards the air outlet area. The present invention can achieve true bladeless air supply, and the air field of the air supply is continuous and stable. By adjusting the velocity ratio of the airflows output from the two outlets of the synthetic jet actuator or the velocity ratio of the airflows output from the outlets of two or more synthetic jet actuators, the three functions of air supply commutation, sweeping and following the target can be realized without using any mechanical structure.

Description

Technical Field

[0001] The present invention belongs to the field of air conditioning devices, and particularly relates to an air conditioning device based on synthetic jet. Background Art

[0002] Traditional indoor convective enhancement means generally use traditional fans to drive air through the shaft work of fan blades. The blades cut the air, generating a complex flow field structure, making the downstream wind field characterized by periodic impacts and wavy stimuli, which is not applicable in occasions with high requirements for wind field quality. At the same time, when a traditional fan is working, its blades are constantly rotating at high speed, posing a certain safety risk to children and animals without the ability to manage their behavior.

[0003] In response to this, the bladeless fan was first invented in the UK, which uses an axial flow turbine buried inside the body to drive air. The design of burying the fan blades inside the bladeless fan essentially improves its use safety. And because it mainly uses the entrainment effect to form the wind field, compared with traditional fans, the flow field quality of the downstream wind field is improved. However, in the design of the bladeless fan, the air driven by the axial flow turbine must be transported to the indoor environment through a tortuous buried flow channel, which has deficiencies in energy efficiency and noise control. Moreover, the direction of the downstream wind is fixed according to the flow channel design, and changing the wind direction can only rely on mechanical structures, resulting in limitations in the application prospects. In addition, the operation of existing bladeless fans still relies on axial flow turbines, and the use and maintenance of high-speed rotating components are still relatively inconvenient. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an air conditioning device based on synthetic jet that does not rely on any high-speed rotating components, tortuous buried flow channels, and can flexibly adjust the wind direction.

[0005] The content of the present invention includes two air guide plates and at least one synthetic jet actuator. The two air guide plates are symmetrically arranged. The air guide plate includes a straight surface air inlet section and a curved surface air outlet section. The cavity between the two straight surface air inlet sections forms an air inlet area. The two curved surface air outlet sections are curved towards the side away from each other, and the cavity between the two curved surface air outlet sections forms an air outlet area. The synthetic jet actuator is arranged in the air inlet area, and the two outlets of the synthetic jet actuator are arranged towards the air outlet area.

[0006] Furthermore, the sides of the curved surface air outlet section away from the straight surface air inlet section are close to each other.

[0007] Furthermore, there are two groups of synthetic jet actuators arranged in parallel.

[0008] Furthermore, the length of the outer shell of the synthetic jet actuator is the same as the length of the straight surface air inlet section.

[0009] Furthermore, a plurality of the synthetic dual-jet actuators are arranged in the longitudinal direction.

[0010] Furthermore, the shells of a plurality of the synthetic dual-jet actuators in a row are integrally formed.

[0011] Furthermore, an air guide member with a water droplet-shaped cross section is arranged between the two outlets of the synthetic dual-jet actuator.

[0012] Furthermore, an air induction section is extended outwardly from the straight air inlet section of the air guide plate away from the curved air outlet section, and the cavity between the two air induction sections forms an air induction area, and the cross-sectional area of ​​the air induction area gradually decreases toward the air inlet side.

[0013] The present invention also comprises a shell for connecting and fixing the air guide plate and the synthetic double jet actuator, wherein a power supply and a controller interconnected with the synthetic double jet actuator are also arranged in the shell.

[0014] The beneficial effects of the present invention are:

[0015] First, the present invention is provided with two air guide plates, and cooperates with the synthetic double jet exciter arranged between the two air guide plates to realize true bladeless air supply. The two curved air outlet sections of the two air guide plates form a Coanda wall surface, which is used to receive and guide the jet to flow along the Coanda wall surface, so that the middle part of the air outlet area forms a stable low-pressure area, accelerates the air flow in the air inlet area, improves the intensity of air supply, and finally realizes continuous and stable air supply; the safety and maintenance convenience are greatly improved compared with conventional air supply equipment;

[0016] Second, by adjusting the speed ratio of the airflow output from the two outlets of the synthetic double jet actuator or the speed ratio of the airflow output from the outlets of more than two synthetic double jet actuators, the three functions of air supply reversing, sweeping and following the target can be performed without using any mechanical structure;

[0017] Third, the air inlet area and the air outlet area of ​​the present invention are spacious and open, which is convenient for combined use with an atomizer, a refrigerator or a heater. If the atomizer, the refrigerator or the heater is arranged in the air inlet area, the supply air can be humidified, heated or cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a structural schematic diagram of the present invention;

[0019] Attached Figure 2 It is a front view of the present invention;

[0020] Attached Figure 3 for Figure 2 Middle AA section view;

[0021] Attached Figure 4 for Figure 3Partial enlarged view of the synthetic jet actuator;

[0022] Appendix Figure 5 Is Figure 2 Partial enlarged view at position B in

[0023] Appendix Figure 6 Is Figure 2 Cross-sectional view taken along the C-C direction in

[0024] Appendix Figure 7 Schematic diagram of the downstream air volume of a conventional synthetic jet actuator;

[0025] Appendix Figure 8 Velocity contour map of the directional wind field of the present invention;

[0026] Appendix Figure 9 Velocity contour map of the commutation wind field of the present invention;

[0027] Appendix Figure 10 Velocity contour map at moment one of the sweeping wind field of the present invention.

[0028] In the figure, 1 - air deflector; 11 - straight surface air inlet section; 12 - curved surface air outlet section; 13 - air guiding section; 2 - synthetic jet actuator; 21 - housing; 211 - side plate; 212 - bottom plate; 213 - partition plate; 22 - vibrating diaphragm; 23 - outlet; 24 - air guiding member; 3 - air inlet area; 4 - air outlet area; 5 - air guiding area; 6 - housing. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, a physical connection or a wireless communication connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0034] As shown in the attached Figures 1-10 figure, the present invention includes two air guide plates 1 and at least one synthetic jet actuator 2. The two air guide plates 1 are symmetrically arranged. The air guide plate 1 includes a straight surface air inlet section 11 and a curved surface air outlet section 12. The two straight surface air inlet sections 11 are parallel to each other. The cavity between the two straight surface air inlet sections 11 forms an air inlet area 3. The two curved surface air outlet sections 12 are curved towards the side away from each other. The cavity between the two curved surface air outlet sections 12 forms an air outlet area 4. The synthetic jet actuator 2 is arranged in the air inlet area 3, and the two outlets 23 of the synthetic jet actuator 2 are arranged towards the air outlet area 4.

[0035] An air inlet area 3 and an air outlet area 4 are formed between two air guide plates 1 of the present invention. A synthetic jet actuator 2 is arranged in the air inlet area 3 and two outlets 23 thereof are arranged towards the air outlet area 4. Periodic zero-mass jets will be formed at the two outlets 23 of the synthetic jet actuator 2. At the same moment, air will be ejected from the cavity through one outlet 23 to form a jet, and air will be adsorbed into the cavity through the other outlet 23. After ejecting the jet, the same outlet 23 will change to adsorb air into the cavity, so as to ensure that there is a jet ejected to form air supply at the same moment, and air enters the cavity for air intake, thereby realizing continuous air intake into the air inlet area 3 and continuously ejecting air towards the air outlet area 4. At the same time, the air in the air inlet area 3 is driven to move towards the air outlet area 4 through the entrainment effect to form air supply, realizing true bladeless air supply, and greatly improving the safety and maintenance convenience. In addition, the functions of reversing, sweeping air and following the target air supply can be realized by adjusting the velocity ratio of the airflows output from the two outlets 23 of the synthetic jet actuator 2 or the velocity ratios of the airflows output from the outlets 23 of two or more synthetic jet actuators 2, without separately designing the air guiding and turning structures. In addition, the two curved air outlet sections 12 are bent towards the side away from each other to form a Coanda wall surface for receiving and guiding the jets ejected by the synthetic jet actuator 2 to flow along the Coanda wall surface, so as to form a stable low-pressure area in the middle part of the air outlet area 4, accelerating the air flow in the air inlet area 3 and improving the intensity of air supply. In addition, the air inlet area 3 and the air outlet area 4 of the present invention are open and spacious, which is convenient for combined use with an atomizer, a cooler or a heater. If the atomizer, the cooler or the heater is arranged in the air inlet area 3, the air supply can be humidified, heated or cooled.

[0036] The two curved air outlet sections 12 are close to each other on the side away from the straight air inlet section 11, so that the air supplies flowing along the two Coanda wall surfaces converge in the air outlet area 4 to form a stronger air supply, avoiding the problem of reduced air supply intensity caused by overly dispersed air supply.

[0037] Among them, the synthetic jet actuator 2 includes a housing 21 and a vibrating diaphragm 22. A cavity and an outlet 23 connecting the cavity are arranged in the housing 21. The vibrating diaphragm 22 is arranged in the cavity and divides the cavity and the outlet 23 into two cavities and two outlets 23.

[0038] The distance between the housing 21 of the synthetic jet actuator 2 and the straight air inlet section 11 is adjustable. Preferably, an air inlet duct is formed between the housing 21 of the synthetic jet actuator 2 and the straight air inlet section 11.

[0039] In one embodiment, two sets of the synthetic jet actuators 2 are arranged in parallel, and the distance between the back sides of the outer shells 21 of the two sets of synthetic jet actuators 2 and the corresponding straight air inlet sections 11 is adjustable. In this embodiment, by arranging one set of synthetic jet actuators 2 near each of the two curved air outlet sections 12, the incoming air flows formed by the two sets of synthetic jet actuators 2 are respectively received and guided by their corresponding curved air outlet sections 12, facilitating the formation of two air supplies close to the curved air outlet sections 12 and improving the stability of the low-pressure area in the middle region of the air outlet area 4.

[0040] As Figure 3 shown, the length of the outer shell 21 of the synthetic jet actuator 2 is the same as that of the straight air inlet section 11. In this embodiment, the outer shell 21 of the synthetic jet actuator 2 is flat-shaped, minimizing the space occupied in the air flow direction and facilitating the formation of the air inlet duct. When two sets of synthetic jet actuators 2 are arranged in parallel, the air inlet area 3 of the two sets of synthetic jet actuators 2 is divided into two narrow air inlet ducts on both sides and a wide air supply duct in the middle.

[0041] A plurality of the synthetic jet actuators 2 are arranged longitudinally. In this embodiment, by arranging a plurality of synthetic jet actuators 2 longitudinally, the intensity and area of the air supply can be improved. At the same time, the adjustment of the air supply intensity in the up and down directions of the air supply can also be achieved by controlling the different air supply speeds between the longitudinally arranged synthetic jet actuators 2.

[0042] In this embodiment, the outer shells 21 of a plurality of the synthetic jet actuators 2 in a row are integrally formed. The outer shell 21 includes two side plates 211 that are equal in height to the air outlet area 4 and are arranged opposite to each other, a bottom plate 212 connecting the back sides of the side plates 211 away from the air outlet area 4, and a plurality of partition plates 213 that are arranged between the two side plates 211 and are spaced apart. The two side plates 211, adjacent partition plates 213, and the bottom plate 212 enclose a cavity, and the side of the cavity away from the bottom plate 212 is the outlet 23. Since there are a plurality of partition plates 213, a plurality of cavities are divided, and a vibration diaphragm 22 is arranged in each cavity, thereby forming a plurality of synthetic jet actuators 2. In this embodiment, the outer shells 21 of the plurality of synthetic jet actuators 2 are integrally formed, avoiding the formation of gaps between rows and affecting air flow, and facilitating the overall structural stability and strength.

[0043] A wind guide member 24 with a water droplet-shaped cross-section is arranged between the two outlets 23 of the synthetic jet actuator 2 to provide a wind guiding effect and make the air ejected from the outlet 23 shoot towards the set position.

[0044] An air guiding section 13 extends outward from the side of the straight air inlet section 11 of the air guiding plate 1 away from the curved air outlet section 12. The cavity between the two air guiding sections 13 forms an air guiding area 5, and the cross-sectional area of the air guiding area 5 gradually decreases towards the air inlet area 3. By arranging the air guiding area 5, it is convenient for air to enter the air inlet area 3.

[0045] The present invention further includes a housing 6 for connecting and fixing the air guide plate 1 and the synthetic jet actuator 2. A power supply and a controller interconnected with the synthetic jet actuator 2 are also provided inside the housing 6. The housing 6 fixes the positions of the air guide plate 1 and the synthetic jet actuator 2, improves the integrity of the device, and at the same time provides an installation space for the power supply and the controller. The power supply powers the synthetic jet actuator 2, and the controller provides a control signal for the vibrating diaphragm 22 of the synthetic jet actuator 2. When multiple synthetic jet actuators 2 are provided, the controller can control multiple synthetic jet actuators 2 to work individually or in combination, thereby realizing flexible regulation of the downstream wind field.

[0046] The specific working principle of the present invention:

[0047] Forming bladeless air supply: The present invention controls the vibrating diaphragm 22 of the synthetic jet actuator 2 to vibrate continuously at a certain frequency through the controller. The two outlets 23 in the synthetic jet actuator 2 jet intermittently. While one outlet 23 jets, the other outlet 23 sucks in air for the next air jet. In this way, air is continuously jetted towards the air outlet area 4, and the air in the air inlet area 3 is driven to move towards the air outlet area 4 through the entrainment effect to form air supply, realizing true bladeless air supply. At the same time, the jet ejected from the outlet 23 flows along the curved air outlet sections 12 on both sides, and a stable low-pressure area is formed in the middle part of the air outlet area 4, accelerating the air flow in the air inlet area 3 and improving the intensity of air supply.

[0048] The air supply volume of a single synthetic jet actuator 2 is as Figure 7 shown. When combining the two air guide plates 1 of the present invention, the directional air supply effect of the present invention is as Figure 3 shown. The mixed air forms a low-pressure area under the action of the two curved air outlet sections 12 and develops towards the end of the air outlet area 4, forming a stable and strong enough wind field.

[0049] When controlling the direction of air supply: When only one synthetic jet actuator 2 is provided, the three functions of reversing, sweeping the wind, and following the target air supply can be realized by controlling the velocity ratio of the airflows output from the two outlets 23 of the synthetic jet actuator 2; when a set of synthetic jet actuators 2 is provided on each of the left and right sides of the synthetic jet actuator 2, the two functions of reversing, sweeping the wind, and following the target air supply can be realized by controlling the jet velocity ratio of the two sets of synthetic jet actuators 2. As Figure 9 shown, reversing air supply means controlling and fixing the jet velocity ratio of the two sets of synthetic jet actuators 2, that is, the air supply is fixed in a certain direction. As Figure 10 shown, Figure 10It is the velocity contour map of a certain moment in the swept wind field. Since the working state of the double synthetic jets on both sides can be quickly adjusted, the wind speed direction in the air outlet area 4 can be controlled and adjusted without any mechanical structure in an extremely short time, realizing fast swept air supply. With the cooperation of sensors, the air supply ability following the target can be achieved in cooperation with the controller, that is, when the sensor detects a moving target that needs air supply, the controller controls the double synthetic jet actuators 2 on both sides to adjust the speed ratio according to the target position data received by the sensor, and then follows the target for air supply.

[0050] The content not detailed in this specification belongs to the prior art well known to those skilled in the art.

Claims

1. An air conditioning device based on synthetic jets, characterized in that, The invention comprises two air guide plates (1) and at least one synthetic double jet exciter (2), wherein the two air guide plates (1) are symmetrically arranged, the air guide plates (1) comprising a straight air inlet section (11) and a curved air outlet section (12), the cavity between the two straight air inlet sections (11) forming an air inlet area (3), the two curved air outlet sections (12) being bent towards a side away from each other to form a Coanda wall, and the cavity between the two curved air outlet sections (12) forming an air outlet area (4) for receiving and guiding the jet ejected by the synthetic double jet exciter (2) to flow along the Coanda wall surface, so that a stable low-pressure area is formed in the middle part of the air outlet area (4), thereby accelerating the air flow in the air inlet area (3), wherein the synthetic double jet exciter (2) is arranged in the air inlet area (3), the two outlets (23) of the synthetic double jet exciter (2) are arranged toward the air outlet area (4), and an air inlet duct is formed between the housing (21) of the synthetic double jet exciter (2) and the air inlet section (11) facing the air inlet; The synthetic dual-jet actuator (2) comprises a housing (21) and a vibrating diaphragm (22); a cavity and an outlet (23) connected to the cavity are arranged in the housing (21); the vibrating diaphragm (22) is arranged in the cavity and divides the cavity and the outlet (23) into two cavities and two outlets (23).

2. The air conditioning device based on synthetic jets according to claim 1, characterized in that, The curved air outlet section (12) is located away from the side of the straight air inlet section (11) and is close to each other.

3. The air conditioning device based on synthetic jets according to claim 1, characterized in that, The synthetic dual-jet actuators (2) are arranged in two groups in parallel.

4. The air conditioning device based on synthetic jets according to claim 3, characterized in that, The length of the housing (21) of the synthetic dual-jet actuator (2) is consistent with the length of the air inlet section (11).

5. The air conditioning device based on a synthetic jet as claimed in any one of claims 1-4, characterized in that, A plurality of the synthetic dual jet actuators (2) are arranged in the longitudinal direction.

6. The air conditioning device based on synthetic jets according to claim 5, characterized in that, The housings (21) of a row of multiple synthetic dual-jet actuators (2) are integrally formed.

7. The air conditioning device based on synthetic jets according to any one of claims 1-4, characterized in that, An air guide (24) having a water droplet-shaped cross section is provided between the two outlets (23) of the synthetic dual-jet exciter (2).

8. The air conditioning device based on a synthetic jet as claimed in any one of claims 1 to 4, characterized in that, An air induction section (13) is provided on the side of the air inlet section (11) of the air guide plate (1) that is facing away from the curved air outlet section (12) and extends outwardly, and a cavity between the two air induction sections (13) forms an air induction area (5), and the cross-sectional area of ​​the air induction area (5) gradually decreases towards the air inlet area (3).

9. The air conditioning device based on a synthetic jet according to any one of claims 1 to 4, characterized in that It also comprises a shell (6) for connecting and fixing the air guide plate (1) and the synthetic dual-jet exciter (2), wherein a power supply and a controller interconnected with the synthetic dual-jet exciter (2) are also arranged in the shell (6).

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