Adjustable blow face duct and method of adjustment

Abstract

The adjustable blowing surface air pipe and adjusting method comprise a pipe body, a slider shunting module, a target setting valve and a pressurized atomization module; the slider shunting module and the pressurized atomization module are arranged on the pipe body and communicate with the inside of the pipe body; the slider shunting module and the pressurized atomization module are connected on the outside of the pipe body, and the target setting valve is arranged on the pressurized atomization module.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning control technology, and specifically relates to an adjustable air duct and its adjustment method. Background Technology

[0002] For new energy pure electric vehicles, when using the car's air conditioning, passengers may experience discomfort such as dryness due to excessive cold or heat when the air conditioning setting is adjusted over a large range. When cooling, selecting a higher setting can cause excessively high airflow speed and a sudden drop in temperature. Similarly, when using the heating function, lower settings result in lower airflow speed and slower temperature rise; therefore, setting a higher setting can cause a rapid increase in interior temperature, but also lead to uneven heating and dry air. These phenomena are mainly caused by excessively concentrated airflow and high airflow velocity at the air vents.

[0003] The existing air conditioning airflow control panel uses a pressure plate design to add a filter and a humidifier, which can filter the air, humidify the in-vehicle environment, and direct the air conditioning airflow to all directions.

[0004] However, the air in the blowing duct used cannot be coupled and controlled with the occupants' gear requirements.

[0005] The existing technology for stratified flow of dry and humid air mainly utilizes the characteristics of air humidity. External circulation fresh air is used for the defrosting channel, while internal circulation return air is used for the foot blowing channel. By setting different air ducts and baffle dampers inside the air conditioning unit, stratified flow of dry and humid air is achieved.

[0006] However, the aforementioned air conditioning unit has a high degree of integration, requires significant modifications to the air conditioning unit itself, and is not applicable to most current air conditioning units. Summary of the Invention

[0007] The purpose of this invention is to provide an adjustable air duct and adjustment method to solve the problems of inability to couple control with the occupant's gear requirements and incompatibility with existing technologies.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An adjustable face blowing duct includes a duct body, a slider diversion module, a target setting valve, and a pressurization atomization module; both the slider diversion module and the pressurization atomization module are mounted on the duct body and communicate with the interior of the duct body; the slider diversion module and the pressurization atomization module are connected to the outside of the duct body, and the target setting valve is mounted on the pressurization atomization module.

[0010] Furthermore, one end of the main pipe is the airflow inlet of the face blowing duct branch, and the other end is the airflow outlet of the face blowing duct branch. The slider diversion module is set on the side of the airflow inlet of the face blowing duct branch, and the pressurization atomization module is set on the side of the airflow outlet of the face blowing duct branch.

[0011] Furthermore, the slider diversion module includes a slider diversion port, a diversion pipe, a proportional valve, and a gas filter valve; the main body of the pipeline is sealed with several slider diversion ports, and each slider diversion port is connected in sequence to a diversion pipe, a proportional valve, and a gas filter valve.

[0012] Furthermore, all gas filter valves are connected to the booster atomization module via manifolds; a pressure sensor is installed on each slider port.

[0013] Furthermore, the pressurized atomization module includes a pneumatic pressurization valve, an atomizer, an atomized liquid return outlet, and an automatic circulation valve; the pneumatic pressurization valve, the atomizer, and the automatic circulation valve are connected in sequence, and the automatic circulation valve is connected to the main pipeline body through the atomized liquid return outlet.

[0014] Furthermore, the pneumatic booster valve and manifold are connected.

[0015] Furthermore, a proportional valve is installed between the pneumatic booster valve and the atomizer.

[0016] Furthermore, the atomizer is equipped with a pressure measuring instrument with a filtration function.

[0017] Furthermore, a method for adjusting an adjustable air duct includes the following steps:

[0018] Install the adjustable face blowing duct onto the blower duct;

[0019] When passengers need facial humidification, the airflow enters the facial airflow duct from the inlet, and the pressure sensor at the slider diversion port detects the pressure of the airflow hitting the wall.

[0020] Based on the set target pressure, the proportional valve determines the number and position to open and opens the airflow diversion port;

[0021] After passing through the gas filter valve, the airflow enters the manifold and flows out of the manifold. After being judged by the target setting valve, the airflow enters the pneumatic booster valve. The boosted airflow drives the liquid in the atomizer to atomize.

[0022] The atomized liquid flows out through the atomized liquid outlet and mixes evenly with the airflow from the branch airflow outlet of the blowing duct, making the air uniform and humidified.

[0023] Furthermore, when the pressure measured by the pressure measuring instrument with the filtering function is greater than the set target value, the automatic circulation valve opens and circulates in the atomizer.

[0024] Compared with the prior art, the present invention has the following technical effects:

[0025] Based on existing air conditioning units, this invention sets a control signal at the fan speed setting, sets an integrated slider with a diversion port in the airflow outlet area, and uses low-pressure airflow at the diversion port to pressurize the liquid in the humidifier, thereby achieving uniform airflow humidification.

[0026] The low-pressure airflow used in this invention is the airflow in the face-blowing duct, requiring no additional air source input or new air generation equipment. Simultaneously, the gas pressurization and humidification circuit described in this invention employs a combination of a proportional valve, a gas circulation valve, and a target control valve. This not only fully utilizes the airflow in the face-blowing duct to divert the airflow but also utilizes the pressurization principle to atomize the liquid. The atomized airflow still flows bidirectionally from the outlet, resulting in a more uniform airflow velocity at the outlet, while also providing humidification. Simulation analysis and theoretical calculations show that the velocity at the atomization return port is approximately 0.15 mL / min, meeting the passenger's needs for airflow uniformity and humidification at different speeds. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the installation location of the present invention;

[0028] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the control method of the present invention. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] Please see Figures 1 to 3 The various parts described in this invention are detailed below:

[0032] 1. The integrated slider structure with diverter ports: installed within the left and right air ducts, located at -Y of the driver's side air duct and +Y of the passenger side air duct, respectively. This slider is designed based on the principle that airflow inertia results in different impact points and pressure distributions within the air ducts at different speeds. Utilizing this characteristic, the integrated slider with diverter ports allows for the creation of different low-pressure airflow diverter ports at varying airflow landing points.

[0033] 2. The gas pressurization and humidification circuit structure described above: By using the principle of liquid atomization through variable diameter pressurization, the low-pressure airflow passing through the integrated slider diverter flows through the pressurizer. The low-pressure airflow drives the large-area pressurization valve to generate a small-area high-pressure end to pressurize and atomize the liquid. Then, it leads to the air outlet of the air duct to make the airflow evenly humidify and improve the passenger's perceived comfort.

[0034] Specifically:

[0035] An adjustable blowing air duct includes a duct body, a slider diversion module, a target setting valve 7, and a pressurization atomization module; both the slider diversion module and the pressurization atomization module are installed on the duct body and are connected to the interior of the duct body; the slider diversion module and the pressurization atomization module are connected to the outside of the duct body, and the target setting valve 7 is installed on the pressurization atomization module.

[0036] One end of the main pipe is the airflow inlet 1 of the face blowing duct branch, and the other end is the airflow outlet 13 of the face blowing duct branch. The slider diversion module is set on one side of the airflow inlet 1 of the face blowing duct branch, and the pressurization atomization module is set on one side of the airflow outlet 13 of the face blowing duct branch.

[0037] The slider diversion module includes a slider diversion port 2, a diversion pipe 3, a proportional valve 4, and a gas filter valve 5; the main body of the pipeline is sealed with several slider diversion ports 2, and each slider diversion port 2 is connected in sequence to a diversion pipe 3, a proportional valve 4, and a gas filter valve 5.

[0038] All gas filter valves 5 are connected to the booster atomization module via manifolds 6; each slider port 2 is equipped with a pressure sensor.

[0039] The pressurized atomization module includes a pneumatic pressurization valve 8, an atomizer 10, an atomized liquid return outlet 12, and an automatic circulation valve 11; the pneumatic pressurization valve 8, the atomizer 10, and the automatic circulation valve 11 are connected in sequence, and the automatic circulation valve 11 is connected to the main pipeline through the atomized liquid return outlet 12.

[0040] The pneumatic booster valve 8 is connected to the manifold 6.

[0041] A proportional valve 4 is installed between the pneumatic booster valve 8 and the atomizer 10.

[0042] The atomizer 10 is equipped with a pressure measuring instrument 9 with a filter function.

[0043] 3. The control method described above: The method of coupling the passenger demand level with the two structures mentioned above, that is, by adding control signals to the gear switch and the slider sensor, the passenger demand and multi-level adjustment are coupled and controlled to achieve the purpose of uniform humidification of the airflow at the air outlet of the air duct.

[0044] like Figure 2As shown, when occupants require facial humidification, airflow enters the facial duct from the inlet. Four pressure sensors A / B / C / D at the branch outlets detect the pressure of the airflow impacting the wall (PA / PB / PC / PD). Based on the set target pressure, the proportional valve determines the number and position of the openings, opening the airflow branch outlets. After passing through the gas filter valve, the airflow enters the manifold and exits. After passing through the target setting valve, it enters the pneumatic booster valve. The boosted airflow then atomizes the liquid inside the atomizer. The atomized liquid flows out through the atomized liquid outlet and mixes evenly with the airflow from the branch outlets of the facial duct, ensuring uniform airflow and humidification. Additionally, when the pressure measured by the pressure measuring instrument with filtration function exceeds the set target value, the automatic circulation valve opens, circulating the air within the atomizer.

[0045] The low-speed pneumatic booster valve of the present invention is installed at the system inlet, allowing fluid to enter the valve at a low flow rate until a preset pressure level is reached, causing the valve to open to full flow.

[0046] The atomizer described in this invention is installed between the pneumatic booster valve and the instrument panel grille outlet. Its main function is to use the boosted gas to drive the liquid inside the atomizer to atomize and humidify it.

[0047] The control method of the present invention, such as Figure 3 As shown, when passengers have needs for facial ventilation and humidification, the control signals of the blower, the slider diverter, the pneumatic booster valve, and the automatic circulation valve are activated respectively. These signals are processed by the air conditioning controller, then output through various sensors, and finally the actuators achieve the purposes of gas pressure division, pressurization, humidification, and homogenization respectively.

[0048] Specific implementation methods:

[0049] When the occupants activate the surface cooling mode, the blower signal, slider splitter port signal, and return port signal are all activated. This is based on a typical occupant cabin space of 3.0m². 3 ~3.5m 3 The fresh air demand is 11m³ 3 Based on a per-person calculation, the total airflow in face-blowing mode is 400m³ / person. 3 / h~500m 3 A simulation analysis of the airflow field was conducted using a flow rate of approximately 0.035 kg / s. The simulation results show that the pressure at the HVAC inlet is approximately 300 Pa, the relative pressure at the airflow outlet is approximately 50 Pa, the average air velocity at the outlet is 7 m / s, and the corresponding mass flow rate is 0.035 kg / s. For the atomizing tube, assuming a diameter of 7.5 mm and a water tank dimensions of approximately 150 mm × 100 mm, the calculated spray rate at the outlet is 0.15 mL / min, which meets the atomization requirements for occupants.

[0050] Compared with commonly used atomizer equipment, the spray rate at the outlet after atomization in this patent meets the requirement of uniform humidification of the airflow at the face blowing nozzle.

[0051] Working principle:

[0052] Gases and fluids are composed of a large number of molecules in constant thermal motion with no fixed equilibrium position. Their fundamental characteristics are the lack of a definite shape and their fluidity. Like other substances, fluids have mass and density. For a homogeneous fluid, the density is expressed as...

[0053] ρ=m / v(1)

[0054] Similarly, gases and fluids have a certain degree of compressibility, and when the fluid shape changes, there is also a certain resistance to motion between the fluid layers. When the compressibility and viscosity of the fluid are very small, it can be approximated as an ideal fluid. The ideal gas law expresses density as a function of temperature and pressure:

[0055]

[0056] Where p is the pressure and R is the unit gas constant. Gases are usually considered as compressible fluids, but when the pressure and temperature of a gas change very little during the entire flow process, it can be considered as an incompressible fluid. In this invention, the gas is considered as an incompressible fluid.

[0057] Meanwhile, the motion of gases follows a continuum mechanism, which studies the behavior of a continuum in response to mechanical forces and is used to control the mechanical properties of fluids. In fluid mechanics, the continuity equation is the specific expression of the law of conservation of mass, namely, the velocity of mass entering a system is equal to the velocity of mass leaving the system. This is predicated on using a continuum model for the fluid, where velocity and density are continuous and differentiable functions of spatial coordinates and time.

[0058]

[0059]

[0060] Right now

[0061] Where: t is time

[0062] V is the volume.

[0063] a is an area vector

[0064] density

[0065] v is velocity

[0066] Su specifies the source item for the user.

[0067] Based on the conservation of gas mass, momentum, and energy, a continuous medium model is adopted for the fluid in the blowing duct using the continuity equation to simplify the calculation of airflow pressure, velocity, and flow rate in the blowing duct. A portion of the low-pressure airflow is used to atomize the liquid flow through gas pressurization, thereby achieving the purpose of humidifying the airflow at the outlet.

[0068] The above description is merely an illustration of some implementation methods of the present invention. It is not intended to limit the present invention to the specific structure and scope of application shown. Therefore, all possible modifications and equivalents are within the scope of the patent application of the present invention.

Claims

1. An adjustable face-blowing duct, characterized in that, It includes a pipeline body, a slider diversion module, a target setting valve (7) and a pressurization atomization module; the slider diversion module and the pressurization atomization module are both installed on the pipeline body and are connected to the inside of the pipeline body; the slider diversion module and the pressurization atomization module are connected on the outside of the pipeline body, and the target setting valve (7) is installed on the pressurization atomization module; The slider diversion module includes a slider diversion port (2), a diversion pipe (3), a proportional valve (4), and a gas filter valve (5); the main body of the pipeline is sealed with several slider diversion ports (2), and each slider diversion port (2) is connected in sequence with a diversion pipe (3), a proportional valve (4), and a gas filter valve (5). All gas filter valves (5) are connected to the booster atomization module via manifolds (6); each slider port (2) is equipped with a pressure sensor; The pressurized atomization module includes a pneumatic pressurization valve (8), an atomizer (10), an atomized liquid return outlet (12), and an automatic circulation valve (11); the pneumatic pressurization valve (8), the atomizer (10), and the automatic circulation valve (11) are connected in sequence, and the automatic circulation valve (11) is connected to the main body of the pipeline through the atomized liquid return outlet (12); When passengers need facial humidification, the airflow enters the facial airflow duct from the inlet, and the pressure sensor at the slider diversion port detects the pressure of the airflow hitting the wall. Based on the set target pressure, the proportional valve determines the number and position to open and opens the airflow diversion port.

2. The adjustable blowing air duct according to claim 1, characterized in that, One end of the main body of the pipe is the airflow inlet (1) of the blowing air duct branch, and the other end is the airflow outlet (13) of the blowing air duct branch. The slider diversion module is set on one side of the airflow inlet (1) of the blowing air duct branch, and the pressurization atomization module is set on one side of the airflow outlet (13) of the blowing air duct branch.

3. An adjustable face-blowing duct according to claim 1, characterized in that, The pneumatic booster valve (8) is connected to the manifold (6).

4. An adjustable face-blowing duct according to claim 1, characterized in that, A proportional valve (4) is provided between the pneumatic booster valve (8) and the atomizer (10).

5. An adjustable face-blowing duct according to claim 1, characterized in that, The atomizer (10) is equipped with a pressure measuring instrument (9) with a filter function.

6. A method for adjusting an adjustable face-blowing duct, characterized in that, The adjustable blowing duct according to any one of claims 1 to 5 includes the following steps: Install the adjustable face blowing duct onto the blower duct; When passengers need facial humidification, the airflow enters the facial airflow duct from the inlet, and the pressure sensor at the slider diversion port detects the pressure of the airflow hitting the wall. Based on the set target pressure, the proportional valve determines the number and position to open and opens the airflow diversion port; After passing through the gas filter valve, the airflow enters the manifold and flows out of the manifold. After being judged by the target setting valve, the airflow enters the pneumatic booster valve. The boosted airflow drives the liquid in the atomizer to atomize. The atomized liquid flows out through the atomized liquid outlet and mixes evenly with the airflow from the branch airflow outlet of the blowing duct, making the air uniform and humidified.

7. The adjustment method of an adjustable blowing duct according to claim 6, characterized in that, When the pressure measured by the pressure measuring instrument with filter function is greater than the set target value, the automatic circulation valve opens and the pressure circulates in the atomizer.

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