CN114235450A - Vehicle air conditioner air volume distribution measuring system and vehicle air conditioner air volume distribution measuring method - Google Patents
Vehicle air conditioner air volume distribution measuring system and vehicle air conditioner air volume distribution measuring method Download PDFInfo
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- CN114235450A CN114235450A CN202111341680.XA CN202111341680A CN114235450A CN 114235450 A CN114235450 A CN 114235450A CN 202111341680 A CN202111341680 A CN 202111341680A CN 114235450 A CN114235450 A CN 114235450A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 29
- 238000004378 air conditioning Methods 0.000 claims description 15
- 238000009529 body temperature measurement Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 12
- 238000010257 thawing Methods 0.000 description 9
- 238000007664 blowing Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
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Abstract
The invention discloses a vehicle air conditioner air volume distribution measuring system and a vehicle air conditioner air volume distribution measuring method. In the air volume distribution measuring system and method for the vehicle air conditioner, the air volume measuring units and the data acquisition units matched with the air outlets in number are adopted, so that the air volumes of all the air outlets can be measured simultaneously.
Description
Technical Field
The invention relates to the technical field of vehicle air conditioners, in particular to a vehicle air conditioner air volume distribution measuring system and a vehicle air conditioner air volume distribution measuring method.
Background
In the whole vehicle air conditioning system, the air duct and the air outlet form a ventilation system of the air conditioner, which is used for sending processed (temperature adjustment, humidity adjustment and purification) air flow to the cockpit, and completing the functions of cockpit ventilation, refrigeration, heating, defrosting, demisting, air purification and the like.
The air quantity distribution proportion of each air outlet of the vehicle air conditioner needs to be tested in the testing stage. Considering the requirement of the comfort of the cockpit, the design of the air conditioner needs to be optimized in the development stage so as to meet the requirement of the air volume distribution proportion of the client under different modes. If the air volume distribution proportion does not meet the requirement, the air conditioning structure or the mode disc needs to be adjusted, the air volume of each functional air outlet is measured again, the air volume distribution proportion is obtained, and the steps are repeated until the requirement is met.
The air-out proportion of present vehicle air conditioner area instrument board is measured, relies on large-scale test equipment amount of wind test bench, and the measuring principle of vehicle air conditioner air outlet's amount of wind distribution proportion is as follows: the air quantity is collected one by one at each air outlet of an air conditioner instrument board by adopting an air suction type air quantity test bed, the air quantity values of the outlets under all modes are collected and added to obtain the total air quantity of the outlets with different functions (blowing surface, blowing feet and defrosting), and the air quantity distribution proportion occupied by each air outlet is obtained by dividing each air outlet value by the air quantity.
The air conditioning mode usually has 7 kinds (blow the face, blow the face/the defrosting, blow the face/blow the foot/the defrosting, blow the foot, the defrosting, the instrument board air outlet usually has 14 (wherein, blow the face 6, blow 4, defrosting 4), consequently complete one-time test needs the amount of wind test bench to gather 98 times totally, and the in-process needs the mode of regulation, amount of wind test bench nozzle size, not only the maloperation appears easily, test time is long, also can't measure the amount of wind of all air outlets of certain mode simultaneously, the air distribution proportion of all air outlets of certain mode of unable visual display.
The measuring defects of the air suction type air quantity table are that the air quantity of all air outlets cannot be measured simultaneously, and the real-time output of the air quantity distribution proportion cannot be realized; this brings the hindrance to the optimization and improvement work of the air conditioner structure in the product design stage. Even though the test beds provided by the existing general air volume test bed manufacturers cannot measure the air volume of all air outlets simultaneously, the real-time air volume distribution proportion of all the air outlets cannot be visually displayed.
Disclosure of Invention
The invention aims to provide a vehicle air conditioner air volume distribution measuring system and a vehicle air conditioner air volume distribution measuring method, which are used for simultaneously measuring the air volume of all air outlets of a vehicle air conditioner and the air volume distribution proportion of each air outlet.
In order to achieve the purpose, the air volume distribution measuring system for the vehicle air conditioner comprises air volume measuring units and data acquisition units, wherein the number of the air volume measuring units is equal to that of air outlets of the vehicle air conditioner, each air volume measuring unit corresponds to one air outlet to measure the air speed and the air temperature, and the data acquisition units process the data of the air speed and the air temperature measured by each air volume measuring unit to obtain the air volume and the air volume distribution proportion of the air outlet corresponding to each air volume measuring unit.
In one embodiment, the air volume measuring unit has an air duct communicated with an air outlet, an air duct air inlet and an air duct air outlet are defined at two ends of an axis of the air duct, and an air outlet direction is defined between the air duct air inlet and the air duct air outlet; the wind barrel comprises a steady flow wind barrel section, a wind speed measuring section and a temperature measuring section along the air outlet direction, and the steady flow wind barrel section, the wind speed measuring section and the temperature measuring section are used for respectively carrying out steady flow, wind speed measurement and temperature measurement on wind in the wind barrel.
In an embodiment, the flow stabilizing air duct section sequentially includes a nozzle, a cross-shaped flow deflector and a flow stabilizing net along the air outlet direction.
In one embodiment, the nozzle is disposed at the position close to the air inlet of the air duct, and is in a gathering structure from the air inlet of the air duct to the cross guide plate.
In an embodiment, the cross-shaped guide plate includes two plate bodies which are cross-shaped, and the intersecting line of the two plate bodies is located on the axis of the air duct to divide the interior of the air duct into four fan-shaped areas.
In an embodiment, the flow stabilizing net includes a first flow stabilizing net, a second flow stabilizing net and a third flow stabilizing net sequentially arranged along the air outlet direction at intervals.
In an embodiment, the wind speed measuring section is provided with a fan and a rotation speed sensor, the fan is arranged in the wind outlet direction, the rotation speed sensor is arranged beside the fan to measure the rotation speed of the fan, and the rotation speed sensor is in signal connection with the data acquisition module.
In an embodiment, the temperature measuring section is provided with a temperature measuring net and a temperature sensor, the temperature measuring net is arranged in the air outlet direction, and the temperature sensor is arranged on the temperature measuring net to measure the temperature of the temperature measuring net.
In one embodiment, the data acquisition unit calculates the air density according to the temperature measured by the temperature sensor, and the data acquisition unit calculates the air volume flow and the air mass flow according to the rotating speed measured by the rotating speed sensor, and calculates the air mass flow according to the air density and the air volume flow.
In order to achieve the purpose, the method adopting the air volume distribution measuring system of the vehicle air conditioner comprises the following steps:
step 1), connecting each air outlet of the vehicle air conditioner with an air duct air inlet of one air volume measuring unit;
step 2), terminals of a rotating speed sensor and a temperature sensor in the air volume measuring unit in the air volume distribution measuring system of the vehicle air conditioner are connected with a data acquisition unit;
step 3), starting the blower motor, adjusting the blower motor to a certain vehicle air conditioner working mode, and acquiring data of all air volume measuring units by the data acquisition unit;
step 3), calculating the air density by using the temperature data acquired by the temperature sensor and a density calculation formula;
step 4), calculating the air volume flow by utilizing the wind speed and the rated sectional area acquired by the rotating speed sensor;
step 5), multiplying the calculated air density and the air volume flow to obtain the air mass flow;
step 6), adding the air mass flow calculated by each air volume measuring unit to obtain the total air volume;
step 7), dividing the air mass flow calculated by each air volume measuring unit by the total air volume to obtain the air volume distribution proportion of each air outlet in the mode;
step 8), displaying the air volume obtained in the step 5) and the air volume distribution proportion obtained in the step 7) in real time;
and 9) repeating the steps 3) to 8) to measure the air volume and the air volume distribution ratio in the next mode until all air conditioner air outlet modes are covered.
In conclusion, the beneficial effects of the invention are as follows: in the vehicle air conditioner air volume distribution measuring system and the vehicle air conditioner air volume distribution measuring method, the air volume measuring unit and the data acquisition unit which are matched with the number of the air outlets are adopted, the air volumes of all the air outlets can be measured simultaneously, and the air volume distribution proportion is displayed in real time through the data acquisition and the display; each air outlet of the air conditioner instrument panel is connected with one air volume measuring unit, so that rapid and real-time air volume distribution proportion data measurement can be realized; the test time is greatly reduced, the product verification and development period is shortened, and the optimization of the design stage is facilitated.
Drawings
Specific embodiments of the present invention will now be described in detail below with reference to the accompanying drawings. It is to be understood that the drawings are not necessarily to scale and that the drawings are merely illustrative of exemplary embodiments of the disclosure and are not to be considered limiting of the scope of the disclosure. In the drawings:
fig. 1 is a schematic structural view of an air volume measuring unit in an air volume distribution measuring system of a vehicle air conditioner in accordance with a preferred embodiment of the present invention;
FIG. 2 is a side view of a schematic perspective view of the air volume measuring unit of FIG. 1 after being half-sectioned;
fig. 3 is a side view of a schematic perspective view of the air volume measuring unit in fig. 1 after being half-cut at another angle.
The elements in the figures are numbered as follows:
an air volume measuring unit 100; an air duct 10; a nozzle 11; a cross baffle 12; a first current stabilizing network 13, a second current stabilizing network 14, and a third current stabilizing network 15; a fan 16; a temperature measuring net 17; a rotational speed sensor 18; a temperature sensor 19.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Aiming at the defects, the invention provides a set of universal vehicle air conditioner air volume distribution measuring system for rapidly measuring the air outlet proportion, so as to solve the problems that the prior art cannot simultaneously measure and cannot display the air volume distribution proportion in real time.
Specifically, referring to fig. 1, the vehicle air-conditioning air volume distribution measuring system according to the embodiment of the present invention includes air volume measuring units 100 and data collecting units (not shown), where the number of the air volume measuring units is equal to that of the vehicle air-conditioning outlets, each air volume measuring unit 100 is corresponding to one air outlet to measure the air speed and the air temperature, and the data collecting unit is configured to perform centralized processing on the data of the corresponding vehicle air-conditioning outlet measured by each air volume measuring unit 100. The air quantity measuring unit 100 provides a rotating speed and temperature acquisition channel; the data acquisition unit calculates air density according to the measured temperature, calculates air volume flow according to the provided rotating speed, calculates air mass flow, finally calculates air volume distribution proportion of each air outlet and displays the air volume distribution proportion on an interactive interface in real time.
Each air quantity measuring unit 100 is integrally cylindrical and comprises an air duct 10, a nozzle 11, a cross guide plate 12, a first flow stabilizing net 13, a second flow stabilizing net 14, a third flow stabilizing net 15, a fan 16 and a temperature measuring net 17, wherein the nozzle is arranged in the air duct 10. The two ends of the air duct 10 along the axial direction are respectively provided with an air duct air inlet and an air duct air outlet, and the nozzle 11, the cross flow guide plate 12, the first flow stabilizing net 13, the second flow stabilizing net 14, the third flow stabilizing net 15, the fan 16 and the temperature measuring net 17 are arranged in the air duct 10 at intervals from the air duct air inlet to the air duct air outlet along the axial direction of the air duct 10.
The air duct 10 is a cylinder, the total axial length of the air duct is 510mm, and the air duct 10 with the universal inner diameter of 110mm is selected as the main body of the air duct with reference to the range of air outlet areas of different instrument boards.
The nozzle 11 is arranged at the position close to the air inlet of the air duct 10 and provides a gathering structure from the air inlet of the air duct to the cross guide plate 12, and the front end of the nozzle 11 gathers the air entering the air duct 10 along the axis direction.
The cross guide plate 12 is arranged in the air outlet direction of the nozzle 11, and comprises two plate bodies which are cross, the intersecting line of the two plate bodies is located on the axis of the air duct 10, so that the air duct 10 is equally divided into four right-angle fan-shaped areas.
The first current stabilizing net 13, the second current stabilizing net 14 and the third current stabilizing net 15 are sequentially arranged in the air outlet direction of the cross flow guide plate 12, and the wind from the cross flow guide plate 12 passes through the multi-stage net bodies to achieve the effect of current stabilization.
The nozzle 11, the guide plate 12 and the flow stabilizing nets 13, 14 and 15 can be fixed and sealed in the air duct 10 through rivets and glue.
The fan 16 is arranged in the air outlet direction of the current stabilizing net and can rotate under the action of wind from the current stabilizing net, and then the wind speed is measured through the rotation of the fan 16.
The temperature measuring net 17 is arranged at the position close to the air outlet of the air duct and used for fixing the temperature measuring device and also has the functions of stabilizing the air outlet of the fan 16 and preventing foreign matters from falling.
A rotational speed sensor 18 is provided at the fan 16 for measuring the rotational speed of the fan 16. Specifically, a measuring head of the fan 16 is screwed into the air duct 10 through an opening on the air duct 10, and a lead of the rotation speed sensor 18 is connected to the data acquisition system.
A temperature sensor 19 is fixed on the temperature measuring net 17 and used for measuring the temperature of the outlet air, and the lead end of the temperature sensor 19 is connected to a data acquisition system. In one embodiment, the temperature sensor 19 may be a type K thermocouple.
From another perspective, the air volume measuring unit 100 divides the air duct 10 into a steady flow air duct section, an air speed measuring section and a temperature measuring section along the air outlet direction. The steady flow air cylinder section sequentially comprises a nozzle 11, a cross-shaped flow deflector 12 and steady flow nets 13, 14 and 15, and is used for stabilizing the flow and increasing the accuracy of air volume measurement. The wind speed measuring section is provided with a fan 16 and a rotating speed sensor 18, and is used for measuring the wind speed of the air outlet and calculating the air volume flow rate by combining the rated sectional area. The temperature measuring section is provided with a temperature measuring net 17 and a temperature sensor 19 for measuring the temperature of the air outlet and calculating the air density.
The method for measuring the air volume distribution by adopting the air volume distribution measuring system of the vehicle air conditioner comprises the following steps:
step 1), connecting each air outlet of the vehicle air conditioner (on the instrument panel) with the air duct air inlet of the air volume measuring unit 100.
The inlets of the nozzle 11 portions of the air volume measuring unit 100, which are the same number as the outlets of the instrument panel, are connected and sealed with each outlet of the instrument panel.
And 2) connecting terminals of the rotating speed sensors 18 and the temperature sensors 19 in all the air volume measuring units 100 in the air volume distribution measuring system of the vehicle air conditioner with a data acquisition unit.
And 3), when all the air outlets are connected, starting the blower motor, adjusting to a certain working mode, and acquiring data of all the air volume measuring units 100 by the data acquisition unit. Air volume distribution ratio
The air conditioner is adjusted to a required mode (face blowing, face blowing/defrosting, face blowing/foot blowing/defrosting, foot blowing, defrosting), the blower motor and the power supply are correctly connected, and rated voltage is set and the air conditioner runs. When the operation is performed for 15 minutes, data of all the air volume measuring units 100 are collected.
And 3) calculating the air density by using the temperature data acquired by the temperature sensor 19 and a density calculation formula.
The calculation formula of the air density ρ is as follows:
ρ＝P/(t+273.15)*(293.15*1.2034/101325)
where rho is the air density in kg/m3；
P-atmospheric pressure, unit Pa;
t-temperature, unit ℃.
And 4) calculating the air volume flow by utilizing the wind speed and the rated sectional area acquired by the rotating speed sensor 18.
The air volume flow V is calculated as follows:
V＝s*v*3600
wherein V is the air volume flow rate in m^3/h；
v-wind speed, unit m/s;
s-sectional area of the duct 10, unit m2。
And 5) multiplying the calculated air density and the air volume flow to obtain the air mass flow, namely the air volume (air volume) of the air outlet.
And 6), adding the air outlet air volume calculated by each air volume measuring unit 100 to obtain the total air volume.
And 7), dividing the air quantity of the air outlet calculated by each air quantity measuring unit 100 by the total air quantity to obtain the air quantity distribution proportion of each air outlet in the mode.
And 8) displaying the air volume obtained in the step 5) and the air volume distribution ratio obtained in the step 7) in real time.
And 9) repeating the steps 3) to 8) to measure the air volume and the air volume distribution ratio in the next mode until all air conditioner air outlet modes are covered.
The vehicle air conditioner air volume distribution measuring system and the vehicle air conditioner air volume distribution measuring method adopt the air volume measuring unit and the data acquisition unit which are matched with the number of the air outlets, can simultaneously measure the air volume of all the air outlets, and display the air volume distribution proportion in real time through the data acquisition and the display. Each air outlet of the air conditioner instrument panel is connected with one air volume measuring unit, so that rapid and real-time air volume distribution proportion data measurement can be realized. The test time is greatly reduced, the product verification and development period is shortened, and the optimization of the design stage is greatly facilitated.
The above-described embodiments of the present invention only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a vehicle air conditioner air volume distribution measurement system which characterized in that: the air quantity distribution system comprises air quantity measuring units (100) and data acquisition units, wherein the number of the air quantity measuring units is equal to that of air outlets of the vehicle air conditioner, each air quantity measuring unit (100) is used for measuring the air speed and the air temperature corresponding to one air outlet, and the data acquisition units are used for processing the data of the air speed and the air temperature measured by each air quantity measuring unit (100) to obtain the air quantity and the air quantity distribution proportion of the air outlet corresponding to each air quantity measuring unit (100).
2. The air-conditioning air volume distribution measuring system for vehicles according to claim 1, characterized in that: the air quantity measuring unit (100) is provided with an air duct (10) communicated with an air outlet, an air duct air inlet and an air duct air outlet are defined at two ends of the axis of the air duct (10), and an air outlet direction is defined between the air duct air inlet and the air duct air outlet in the air duct (10); the wind barrel comprises a steady flow wind barrel section, a wind speed measuring section and a temperature measuring section along the air outlet direction, and the steady flow wind barrel section, the wind speed measuring section and the temperature measuring section are used for respectively carrying out steady flow, wind speed measurement and temperature measurement on the wind in the wind barrel (10).
3. The air-conditioning air volume distribution measuring system for vehicles according to claim 2, characterized in that: the flow stabilizing air duct section sequentially comprises a nozzle (11), a cross-shaped flow deflector (12) and a flow stabilizing net along the air outlet direction.
4. The air-conditioning air volume distribution measuring system for vehicles according to claim 3, characterized in that: the nozzle (11) is arranged at the position close to the air inlet of the air duct and is of a gathering structure from the air inlet of the air duct to the cross guide plate (12).
5. The air-conditioning air volume distribution measuring system for vehicles according to claim 3, characterized in that: the cross guide plate (12) comprises two plate bodies which are crossed, and the intersecting line of the two plate bodies is positioned on the axis of the air duct (10) and divides the inside of the air duct (10) into four fan-shaped areas.
6. The air-conditioning air volume distribution measuring system for vehicles according to claim 3, characterized in that: the flow stabilizing net comprises a first flow stabilizing net (13), a second flow stabilizing net (14) and a third flow stabilizing net (15) which are sequentially arranged along the air outlet direction at intervals.
7. The air-conditioning air volume distribution measuring system for vehicles according to claim 2, characterized in that: the wind speed measuring section is provided with a fan (16) and a rotating speed sensor (18), the fan (16) is arranged in the air outlet direction, the rotating speed sensor (18) is arranged beside the fan (16) to measure the rotating speed of the fan (16), and the rotating speed sensor (18) is in signal connection with the data acquisition module.
8. The air-conditioning air volume distribution measuring system for vehicles according to claim 7, wherein: the temperature measurement section is equipped with temperature measurement net (17) and temperature sensor (19), temperature measurement net (17) set up in the air-out direction, temperature sensor (19) set up in order to measure on temperature measurement net (17) the temperature of temperature measurement net (17) department.
9. The air-conditioning air volume distribution measuring system for vehicles according to claim 8, characterized in that: the data acquisition unit calculates the air density according to the temperature measured by the temperature sensor (19), calculates the air volume flow and the air mass flow according to the rotating speed measured by the rotating speed sensor (18), and calculates the air mass flow according to the air density and the air volume flow.
10. A method of employing the air-conditioning air volume distribution measuring system for a vehicle according to any one of claims 1 to 9, comprising the steps of:
step 1), connecting each air outlet of the vehicle air conditioner with an air duct air inlet of one air volume measuring unit (100);
step 2), terminals of a rotating speed sensor (18) and a temperature sensor (19) in the air volume measuring unit (100) in the vehicle air conditioner air volume distribution measuring system are connected with a data acquisition unit;
step 3), starting the blower motor, and adjusting to a certain vehicle air conditioner working mode, wherein the data acquisition unit acquires data of all the air volume measurement units (100);
step 3), calculating the air density by using the temperature data acquired by the temperature sensor (19) and a density calculation formula;
step 4), calculating the air volume flow by utilizing the wind speed and the rated sectional area acquired by the rotating speed sensor (18);
step 5), multiplying the calculated air density and the air volume flow to obtain the air mass flow;
step 6), adding the air mass flow calculated by each air volume measuring unit (100) to obtain the total air volume;
step 7), dividing the air mass flow calculated by each air volume measuring unit (100) by the total air volume to obtain the air volume distribution proportion of each air outlet in the mode;
step 8), displaying the air volume obtained in the step 5) and the air volume distribution proportion obtained in the step 7) in real time;
and 9) repeating the steps 3) to 8) to measure the air volume and the air volume distribution ratio in the next mode until all air conditioner air outlet modes are covered.
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