CN106864205B - Temperature compensation method and system of solar air conditioner for vehicle - Google Patents

Temperature compensation method and system of solar air conditioner for vehicle Download PDF

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Publication number
CN106864205B
CN106864205B CN201710210108.7A CN201710210108A CN106864205B CN 106864205 B CN106864205 B CN 106864205B CN 201710210108 A CN201710210108 A CN 201710210108A CN 106864205 B CN106864205 B CN 106864205B
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vehicle
sun
temperature compensation
value
temperature
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CN201710210108.7A
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Chinese (zh)
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CN106864205A (en
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不公告发明人
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徐州皇浦世味食品有限公司
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/0075Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being solar radiation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00764Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed
    • B60H1/00771Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed the input being a vehicle position or surrounding, e.g. GPS-based position or tunnel

Abstract

a temperature compensation method and system of a solar air conditioner for a vehicle comprises (1) detecting the position of the sun; (2) detecting a direct solar radiation intensity value, a solar radiation scattering intensity value and the hourly air temperature and humidity of a design day; (3) detecting the longitude value and the latitude value of the vehicle at the time and the driving direction; (4) judging the position relation between the sun and the vehicle; (5) determining outdoor environment data; (6) calculating a plurality of temperature compensation coefficients of the area where the vehicle is located, and storing the temperature compensation coefficients in a database; (7) inquiring a corresponding temperature compensation coefficient in a database; detecting the sunlight intensity through a single-zone light intensity sensor; and performing sunlight compensation on different areas of the vehicle according to the functional relation between the sunlight intensity and the temperature compensation coefficient to serve as temperature compensation. The method couples the light intensity and the temperature so as to realize the universal use of the solar air conditioner for the vehicle, reduce the cost and realize the complexity of the multi-temperature-zone automatic air conditioner.

Description

Temperature compensation method and system of solar air conditioner for vehicle

Technical Field

The invention relates to the air conditioning technology of a vehicle, in particular to a temperature compensation method and system of a solar air conditioner for the vehicle.

Background

Nowadays, air conditioners are indispensable equipment for automobiles. With the improvement of comfort requirements of customers, the multi-temperature-zone solar air conditioner capable of realizing temperature zone control in the vehicle is increasingly applied to the vehicle.

In the running process of the vehicle, because the influence of sunlight on each temperature zone of the vehicle is different along with the different position relationship between the sun and the vehicle, in addition, the influence of factors such as sunlight irradiation intensity on each part in the vehicle is different due to different seasons, the volatilization of carcinogenic substances in the decorative materials in the vehicle can be accelerated by the high-temperature environment in the vehicle in summer, the body health of people is seriously influenced, the refrigerant used by the refrigeration driving system can affect the atmosphere, so the prior auxiliary air conditioning system of the solar automobile is widely used, the solar energy received by the automobile is converted into electric energy by utilizing the principle of solar photoelectric conversion, then the semiconductor refrigeration is driven to adjust the internal temperature of the automobile, a plurality of temperature zones are divided according to the number and the positions of passengers in the automobile and the positions of automobile decorations, and the air-conditioning compensation requirements of the temperature zones for sunlight irradiation are different. At present, the multi-temperature-zone air conditioner adopts a multi-temperature-zone sunlight sensor to respectively measure the influence of sunlight on different zones, thereby calculating and obtaining the air conditioner compensation of each temperature zone. Because the multi-temperature-zone air conditioner is integrated with a plurality of temperature sensors, the cost is high, and the cost control is not facilitated; on the other hand, a plurality of temperature sensors inevitably lead to the corresponding increase of demand to vehicle system controller input pin resource to increase the complexity of its realization, be unfavorable for unmanned automobile's popularization and application. Instead, the conventional control method of the central air conditioner is adopted for temperature compensation, which is usually DDC control based on a PID algorithm, and a control object of the air conditioning system, namely a hot working object, has some unique characteristics, such as various interference influences, which cause large-range fluctuation of air conditioning load, so that the air conditioning system has multiple working conditions due to different seasons, and the correlation between temperature and humidity increases the difficulty of temperature control. Therefore, the conventional PID temperature control in the prior art is difficult to adapt to the requirements of multi-zone temperature control, has poor robustness, strong parameter hysteresis, difficult accurate control and is easy to generate overshoot and oscillation.

Disclosure of Invention

The invention solves the problem that a more optimized temperature compensation method and a more optimized temperature compensation system are adopted, the characteristics of uncertainty, multi-working condition, time-varying property and multi-disturbance of a solar air-conditioning temperature system of a vehicle are overcome, and a prediction compensation control strategy is adopted to carry out compensation control on the basis of acquiring mass data.

in order to solve the above problems, the present invention provides a temperature compensation method for a solar air conditioner for a vehicle, including:

(1) detecting the sun inclination angle, the time difference, the local sun time, the sun altitude and azimuth angle and the sun incident angle to calculate the position of the sun,

(2) detecting a direct solar radiation intensity value, a solar radiation scattering intensity value and the hourly air temperature and humidity of a design day;

(3) Detecting the current longitude value and the current latitude value of a vehicle and the current driving direction of the vehicle;

(4) Judging the position relation between the sun and the vehicle according to the magnitude relation between the position of the sun and the latitude value of the vehicle and the longitude value of the position of the sun;

(5) according to the position and season of the vehicle, calling average meteorological data of the same day of the place in recent years to determine outdoor environment data;

(6) Calculating a plurality of temperature compensation coefficients of the area where the vehicle is located according to the hourly temperature, the outdoor environment data and the indoor environment data of the design day, and storing the temperature compensation coefficients in a database;

(7) inquiring a corresponding temperature compensation coefficient in a database according to the corresponding relation between the driving direction of the vehicle, the position relation between the sun and the vehicle and the temperature compensation coefficient of the area where the vehicle is located; detecting the sunlight intensity through a single-zone light intensity sensor; and carrying out sunlight compensation on different areas of the vehicle according to the functional relation between the sunlight intensity and the temperature compensation coefficient, and taking the sunlight compensation as temperature compensation.

Preferably, the detecting the position of the sun includes detecting a longitude value and detecting a latitude value.

Preferably, the longitude value detection includes: and acquiring the longitude value of the sun position corresponding to the current time according to the linear relation of the change of the sun longitude along with the design day.

Preferably, the weft value detection includes: and acquiring the latitude value of the sun position corresponding to the current date according to the linear relation of the sun latitude changing along with the design day.

Preferably, the detecting the current longitude value and the current latitude value of the vehicle includes: and detecting the current longitude value and latitude value of the vehicle through a GPS positioning device.

Preferably, the detecting the current driving direction of the vehicle includes: and judging the driving direction of the vehicle according to the change of the longitude value and the latitude value of the vehicle.

Preferably, the indoor environment data includes: the opaque envelope of automobile body spreads into the heat time by time, window glass spreads into the heat time by time, passenger's heat dissipation capacity, electrical equipment heat dissipation capacity and/or the heat that new trend air exchange system spreads into.

preferably, performing the solar compensation on the different regions of the vehicle according to the functional relationship between the solar light intensity and the temperature compensation coefficient includes multiplying the solar light intensity by the temperature compensation coefficient as the temperature compensation value of the different regions of the vehicle.

A temperature compensation system of a solar air conditioner for a vehicle, comprising: the first detection unit is used for detecting a sun inclination angle, a time difference, a local sun time, a sun altitude angle, an azimuth angle and a sun incident angle so as to calculate the position of the sun; the second detection unit is used for detecting the direct solar radiation intensity value, the solar radiation scattering intensity value and the hourly air temperature and humidity of the design day; the third detection unit is used for detecting the current longitude value and the current latitude value of the vehicle and the current driving direction of the vehicle; the judging unit is used for judging the position relation between the sun and the vehicle according to the magnitude relation between the position of the sun and the latitude value of the vehicle and the longitude value of the position of the sun; the outdoor environment determining unit is used for calling average meteorological data of the same day of the place in recent years to determine outdoor environment data according to the position and season of the vehicle; the calculation unit is used for calculating a plurality of temperature compensation coefficients of the area where the vehicle is located according to the hourly temperature, the outdoor environment data and the indoor environment data of the design day and storing the temperature compensation coefficients in the database; the control unit is used for controlling the single-zone sunlight sensor to detect the sunlight intensity; and the compensation unit is used for inquiring the corresponding temperature compensation coefficient in a database according to the corresponding relation between the driving direction of the vehicle, the position relation between the sun and the vehicle and the temperature compensation coefficient of the area where the vehicle is located, and carrying out sunlight compensation on different areas of the vehicle according to the functional relation between the sunlight intensity and the temperature compensation coefficient so as to realize the temperature compensation.

Preferably, the first detection unit includes: the first detection subunit is used for detecting the design; the first acquisition subunit is used for acquiring the longitude value of the sun position corresponding to the current time according to the linear relation of the change of the sun longitude along with the time.

Preferably, the first detection unit includes: the second detection subunit is used for detecting the design; and the second acquisition subunit is used for acquiring the latitude value of the sun position corresponding to the current date according to the linear relation of the solar latitude changing along with the time.

Preferably, the second detection unit includes: and the control subunit is used for detecting the current longitude value and the current latitude value of the vehicle through the GPS positioning device.

Preferably, the second detection unit further includes: and the judging subunit is used for judging the driving direction of the vehicle according to the change of the longitude value and the latitude value of the vehicle.

Preferably, the compensation unit includes: and the calculating subunit is used for performing sunlight compensation on different areas of the vehicle according to the functional relation between the sunlight intensity and the temperature compensation coefficient, and multiplying the sunlight intensity by the temperature compensation coefficient to be used as temperature compensation values of the different areas of the vehicle.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages:

The position of the sun is compared with the longitude and latitude of the vehicle, the position relation between the sun and the vehicle is obtained, the driving direction of the vehicle is combined, the degree of sunlight irradiation on each area of the vehicle can be known, the position relation between the current sun and the vehicle corresponding to each area of the vehicle and the compensation coefficient of the driving direction are obtained, external environment data and internal environment data are fused, environmental factors such as heat dissipation of people outside the temperature are also taken as consideration factors of temperature compensation, only one single-area sunlight sensor is needed to detect the sunlight intensity as a reference, the light intensity is coupled with the temperature, the general use of the vehicle solar air conditioner based on the photovoltaic principle and the photothermal principle is realized, and the cost and the realization complexity of the multi-temperature-area automatic air conditioner are reduced.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. The objects and features of the present invention will become more apparent in view of the following description taken in conjunction with the accompanying drawings, in which:

Fig. 1 is a flowchart of a temperature compensation method of a solar air conditioner for a vehicle according to an embodiment of the present invention;

FIG. 2 is a flow chart of calculating solar radiation intensity according to an embodiment of the present invention;

Fig. 3 is a block diagram of a temperature compensation system of a solar air conditioner for a vehicle according to an embodiment of the present invention.

Detailed Description

referring to fig. 1, an embodiment relates to a temperature compensation method of a solar air conditioner for a vehicle, including: (1) detecting the sun inclination angle, the time difference, the local sun time, the solar altitude angle, the solar azimuth angle and the solar incident angle so as to calculate the position of the sun; (2) detecting a direct solar radiation intensity value, a solar radiation scattering intensity value and the hourly air temperature and humidity of a design day; (3) detecting the current longitude value and the current latitude value of a vehicle and the current driving direction of the vehicle; (4) judging the position relation between the sun and the vehicle according to the magnitude relation between the position of the sun and the latitude value of the vehicle and the longitude value of the position of the sun; (5) according to the position and season of the vehicle, calling average meteorological data of the same day of the place in recent years to determine outdoor environment data; (6) calculating a plurality of temperature compensation coefficients of the area where the vehicle is located according to the hourly temperature, the outdoor environment data and the indoor environment data of the design day, and storing the temperature compensation coefficients in a database; (7) inquiring a corresponding temperature compensation coefficient in a database according to the corresponding relation between the driving direction of the vehicle, the position relation between the sun and the vehicle and the temperature compensation coefficient of the area where the vehicle is located; detecting the sunlight intensity through a single-zone light intensity sensor; and carrying out sunlight compensation on different areas of the vehicle according to the functional relation between the sunlight intensity and the temperature compensation coefficient, and taking the sunlight compensation as temperature compensation. Wherein detecting the position of the sun comprises detecting a longitude value and detecting a latitude value. The longitude value detection comprises the following steps: and acquiring the longitude value of the sun position corresponding to the current time according to the linear relation of the change of the sun longitude along with the design day. The latitude value detection comprises the following steps: and acquiring the latitude value of the sun position corresponding to the current date according to the linear relation of the sun latitude changing along with the design day. And detecting the current longitude value and the current latitude value of the vehicle through a GPS positioning device. Detecting the current driving direction of the vehicle comprises: and judging the driving direction of the vehicle according to the change of the longitude value and the latitude value of the vehicle. Indoor environmental data includes: the opaque envelope of automobile body spreads into the heat time by time, window glass spreads into the heat time by time, passenger's heat dissipation capacity, electrical equipment heat dissipation capacity and/or the heat that new trend air exchange system spreads into. Performing the solar compensation on the different areas of the vehicle according to the functional relationship between the solar light intensity and the temperature compensation coefficient includes multiplying the solar light intensity by the temperature compensation coefficient as the temperature compensation values of the different areas of the vehicle.

Solar radiation heat belongs to external interference, the stronger the radiation, the worse the working time of a vehicle air conditioner, and the worse the environment, the better the requirement of refrigeration meeting, and the greater the difference of the radiation intensity at different time in one day, but the strong adaptability of the vehicle to the temperature, which changes rapidly along with the change of the environment temperature, also leads to the increase of the working difficulty of the air conditioner, so the general rule of the solar radiation must be accurate to make the most practical calculation for the compensation quantity.

Wherein, the direct solar radiation intensity received by any surface is related to the direct solar radiation intensity received by the surface vertical to the solar ray and the cosine value of the sunlight incident angle, generally the product of the two, the scattering intensity of the solar radiation is the sum of the sky scattering radiation intensity and the ground reflection radiation intensity, for the case of sky scattering, the scattering radiation influence difference obtained under the weather conditions of sunny days, cloudy days and rainy and snowy days is larger, the same season shows a certain rule, the verification is performed by crossing the experience and the table look-up mode, the included angle between the vehicle surface and the horizontal plane is also taken as a consideration factor, as long as the included angle is consistent in the same place at the same time, any oriented surface has the same sky radiation scattering, for the ground reflection, the product of the ground reflectivity and the sine value of the solar altitude angle can be adopted, then the weight coefficient is given by considering the ground property, the ground reflection of general asphalt ground is small, and the ground reflection of uneven ground is large.

The calculation of the sun position is the point of major interest for this embodiment. In a specific implementation, the longitude value of the sun position at the current time can be obtained as follows: and storing the mapping relation between the solar longitude value and the design day in a chart or formula form in advance. The design day is a statistical value obtained by arranging measured actual data by a scientific method and is not a true data of a certain day alone, and the actual data is determined according to the average meteorological data of a certain day in a certain place in recent years. In the diagram of correspondence between the longitude of the sun and the time according to an embodiment of the present invention, the horizontal axis represents the time, which may be specifically minutes, and the vertical axis represents the solar longitude value. The solar longitude value and the design day are in a linear relation. When sunlight compensation is performed, by detecting the design time, for example, the system time can be detected from the vehicle-mounted system as the design time, and the longitude value of the sun position corresponding to the design day can be acquired according to the stored linear mapping relation information of the change of the sun longitude along with the time. In specific implementation, the latitude value of the sun position corresponding to the design day can be obtained as follows: and storing the mapping relation between the solar latitude value and the time in a chart or formula form in advance. In the schematic diagram of the correspondence between the latitude and the date of the sun in the embodiment of the invention, the horizontal axis represents the date, and the vertical axis represents the latitude value of the sun. The solar latitude value and the design day are in a linear relation. When sunlight compensation is carried out, the design day is detected, for example, the system date is detected from an on-board system to serve as the design day, and the latitude value of the sun position corresponding to the design day can be acquired according to the stored linear mapping relation information of the sun latitude changing along with the date. It is to be understood that the above-described method of acquiring the solar longitude and the solar latitude value is only one method of acquiring the solar longitude and latitude position information. The position information of the sun can also be directly acquired by other methods, such as the vehicle-mounted system connecting the related application service through the network. All falling within the scope of protection of the present invention.

For the calculation of the solar inclination angle d, because an included angle exists between the rotation axis of the earth and the revolution axis of the earth rotating around the sun, the included angle is the solar inclination angle, namely the included angle between the sun ray and the equatorial plane of the earth, the calculation of the solar inclination angle is carried out by adopting a known formula, and the variation range is-23.4 degrees. Due to the non-uniform rotation of the earth, the time difference between the sun and the time that we usually say, and further the design day, should be taken into consideration in the calculation of the sun position. The local solar time and the Beijing time described by us at ordinary times have the following relationship:

T + e + (L-120)/15, where T represents beijing time, L is the longitude of the calculation location, and e represents the time difference as described above.

The solar hour angle H is calculated as: H15X (t-12)

The solar altitude angle refers to an angle of a direct ray of an incident ray of the sun deviating from a horizontal component thereof, and is a sum of a product of a sine value of a calculated latitude and a sine value of a calculated longitude and a cosine value of the calculated latitude and the calculated cosine value of the longitude, the solar azimuth angle refers to an azimuth angle of a horizontal projection of the ray of the sun deviating from a southward direction, and a quotient of the product of the sine value of the calculated latitude and the calculated sine value of the longitude and the cosine value of the calculated latitude and the calculated cosine value of the longitude. The intensity of the sunlight incident angle is related to the calculation of the direct sunlight intensity, the included angle between the sunlight horizontal projection and the surface normal of the vehicle body is set as n, a is the normal azimuth angle of the vehicle body, and the direct sunlight intensity is as follows: i ═ I' cos a cos n. Therefore, the intensity value received by the solar radiation intensity on any surface and any design day can be calculated, the calculation through computer software is simpler, the required relevant data such as the solar radiation intensity can be calculated by inputting the parameters such as time, place, automobile orientation and the like corresponding to the design day in the program, and the relevant data is used as the basis for calculating the temperature compensation value, wherein the program flow for calculating the solar radiation intensity is shown in fig. 2.

When the temperature compensation value is calculated and then the solar illumination is calculated, the dual functions of the environmental temperature and the solar radiation are generally considered, therefore, except the process of calculating the vehicle glass, other methods need to combine the two items into a comprehensive temperature which is used as external interference, the comprehensive temperature does not exist actually and is an assumed value and cannot reflect any actual physical process, wherein the comprehensive temperature calculation formula has a relation with the air temperature inside and outside the vehicle room, the absorptivity of the surface to the radiation, the color and the service time of the vehicle body, the convective heat transfer coefficient of the outer surface of the vehicle body, the absorptivity of the outer surface of the vehicle to the long-wave radiation, the difference between the long-wave radiation emitted by the outer surface of the vehicle and the received long-wave radiation, and the relation between the independent variables and the dependent variables is found practically and is difficult, so that the vertical plane and the horizontal plane are used as two extreme light receiving planes, a certain amount of radiation and temperature data is then collected for dynamic fitting to perform the approximation process.

the calculation of the indoor environment data includes: the opaque envelope of automobile body spreads into the heat time by time, window glass spreads into the heat time by time, passenger's heat dissipation capacity, electrical equipment heat dissipation capacity and/or the heat that new trend air exchange system spreads into. The non-transparent part of the automobile body mainly comprises a side wall, a door, a ceiling and a floor. According to a steady-state transfer theory, the product of the transferred heat and the heat dissipation area of the enclosure structure, the indoor and outdoor temperature difference and the comprehensive average heat transfer coefficient of each part of the enclosure structure is obtained to be in direct proportion. We generally consider each face of the enclosure as approximately a vertical face and cannot consider the portion containing the glass, and the area of the maintenance structure mainly considers the left and right side walls and the door, including the inner and outer steel plates, the inner non-metal plate and the air gap. The energy transmitted through the vehicle glass comprises heat transmitted to the surroundings through convection and long-wave radiation after the temperature of the glass is increased due to the absorption of radiation heat by the glass, and short-wave radiation heat directly transmitted into a vehicle room is the other part. And thus can be expressed as the sum of the two heats, and the amount of heat absorbed per unit of glass includes the product of the thermal radiant heat absorbed per unit area and the direct absorption, and is related to the scattered absorption and the scattered radiation intensity if the glass has strong scattering properties. The temperature of the glass is increased under the action of solar radiation, then the glass is respectively subjected to heat transfer with indoor and outdoor air, a heat balance equation is constructed on the assumption that the heat transfer process is stable, the heat transferred in a unit area is obtained according to the heat absorbed by unit glass and the heat balance equation, and then the heat is converted into a temperature compensation coefficient according to a surface heat exchange convection coefficient. Aiming at the calculation of the heat dissipation capacity of passengers, different heat dissipated by different human bodies is related to sex, height, weight and wearing, and an empirical calculation table for obtaining a clustering coefficient according to statistics comprises a cross query table for the number, the sex, the height range, the weight range and the dressing property (cotton, hemp, wool, silk fabric and the like) of the passengers. For the heat dissipation amount of the electric device, the total amount of heat dissipated from the battery and the motor is considered according to the vehicle properties, and an empirical value of heat dissipation of the electric device is obtained by a statistical method. At present, a vehicle may need to be provided with a fresh air system, the more fresh air quantity is input, the better the environment in the vehicle is, and the air conditioner temperature compensation disturbance of the vehicle comes along with the fresh air quantity, so that the fresh air input load, the air leakage quantity corresponding to a vehicle gap and the vehicle speed are used as independent variables of an air conditioner temperature compensation value to perform linear fitting.

Taking Shenzhen Lantian region as an example, the ground temperature is 40 ℃ and the air temperature is 32 ℃ in summer, 4 people are taken in the electric vehicle, the fresh air volume is 40 cubic meters per hour, the design day is cloudy, the atmospheric air density is 1.2kg/m 3, and the comprehensive calculation temperature compensation coefficient is 1.2 after the heat load in the vehicle is obtained through calculation.

Fig. 3 is a frame of a temperature compensation system of a solar air conditioner for a vehicle according to an embodiment of the present invention, which includes: the first detection unit is used for detecting a sun inclination angle, a time difference, a local sun time, a sun altitude angle, an azimuth angle and a sun incident angle so as to calculate the position of the sun; the second detection unit is used for detecting the direct solar radiation intensity value, the solar radiation scattering intensity value and the hourly air temperature and humidity of the design day; the third detection unit is used for detecting the current longitude value and the current latitude value of the vehicle and the current driving direction of the vehicle; the judging unit is used for judging the position relation between the sun and the vehicle according to the magnitude relation between the position of the sun and the latitude value of the vehicle and the longitude value of the position of the sun; the outdoor environment determining unit is used for calling average meteorological data of the same day of the place in recent years to determine outdoor environment data according to the position and season of the vehicle; the calculation unit is used for calculating a plurality of temperature compensation coefficients of the area where the vehicle is located according to the hourly temperature, the outdoor environment data and the indoor environment data of the design day and storing the temperature compensation coefficients in the database; the control unit is used for controlling the single-zone sunlight sensor to detect the sunlight intensity; and the compensation unit is used for inquiring the corresponding temperature compensation coefficient in a database according to the corresponding relation between the driving direction of the vehicle, the position relation between the sun and the vehicle and the temperature compensation coefficient of the area where the vehicle is located, and carrying out sunlight compensation on different areas of the vehicle according to the functional relation between the sunlight intensity and the temperature compensation coefficient so as to realize the temperature compensation.

Preferably, the first detection unit includes: the first detection subunit is used for detecting the design; the first acquisition subunit is used for acquiring the longitude value of the sun position corresponding to the current time according to the linear relation of the change of the sun longitude along with the time.

Preferably, the first detection unit includes: the second detection subunit is used for detecting the design; and the second acquisition subunit is used for acquiring the latitude value of the sun position corresponding to the current date according to the linear relation of the solar latitude changing along with the time.

Preferably, the second detection unit includes: and the control subunit is used for detecting the current longitude value and the current latitude value of the vehicle through the GPS positioning device.

preferably, the second detection unit further includes: and the judging subunit is used for judging the driving direction of the vehicle according to the change of the longitude value and the latitude value of the vehicle.

Preferably, the compensation unit includes: and the calculating subunit is used for performing sunlight compensation on different areas of the vehicle according to the functional relation between the sunlight intensity and the temperature compensation coefficient, and multiplying the sunlight intensity by the temperature compensation coefficient to be used as temperature compensation values of the different areas of the vehicle.

The embodiment of the invention solves the problems that a better optimized temperature compensation method and a better optimized temperature compensation system are adopted, the characteristics of uncertainty, multi-working condition, time variation and multi-disturbance of a solar air-conditioning temperature system of a vehicle are overcome, a prediction compensation control strategy is adopted to carry out compensation control on the basis of acquiring mass data, simulation and actual operation conditions show that the control effect is better, and the temperature compensation precision is obviously improved.

While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It will be understood by those skilled in the art that variations and modifications of the embodiments of the present invention can be made without departing from the scope and spirit of the invention.

Claims (9)

1. a temperature compensation method of a solar air conditioner for a vehicle, comprising:
(1) Detecting the sun inclination angle, the time difference, the local sun time, the solar altitude angle, the solar azimuth angle and the solar incident angle so as to calculate the position of the sun;
(2) detecting a direct solar radiation intensity value, a solar radiation scattering intensity value and the hourly air temperature and humidity of a design day;
(3) Detecting the current longitude value and the current latitude value of a vehicle and the current driving direction of the vehicle;
(4) judging the position relation between the sun and the vehicle according to the magnitude relation between the position of the sun and the latitude value of the vehicle and the longitude value of the position of the sun;
(5) According to the position and season of the vehicle, calling average meteorological data of the same day of the place in recent years to determine outdoor environment data;
(6) calculating a plurality of temperature compensation coefficients of the area where the vehicle is located according to the hourly air temperature, the outdoor environment data and the indoor environment data of the design day, and storing the temperature compensation coefficients in a database;
(7) Inquiring a corresponding temperature compensation coefficient in a database according to the corresponding relation between the driving direction of the vehicle, the position relation between the sun and the vehicle and the temperature compensation coefficient of the area where the vehicle is located; detecting the sunlight intensity through a single-zone light intensity sensor; and carrying out sunlight compensation on different areas of the vehicle according to the functional relation between the sunlight intensity and the temperature compensation coefficient, and taking the sunlight compensation as temperature compensation.
2. The temperature compensation method of a solar air conditioner for a vehicle of claim 1, wherein the position of the sun includes a longitude value and a latitude value.
3. The temperature compensation method of a solar air conditioner for a vehicle according to claim 2, wherein the longitude value detection includes: and acquiring the longitude value of the sun position corresponding to the current time according to the linear relation of the change of the sun longitude along with the design day.
4. The temperature compensation method of a solar air conditioner for a vehicle according to claim 2, wherein the latitude value detection includes: and acquiring the latitude value of the sun position corresponding to the current date according to the linear relation of the sun latitude changing along with the design day.
5. The temperature compensation method of a solar air conditioner for a vehicle according to claim 1, wherein the detecting a current longitude value and a current latitude value of a vehicle comprises: and detecting the current longitude value and latitude value of the vehicle through a GPS positioning device.
6. The temperature compensation method of a solar air conditioner for a vehicle according to claim 5, wherein detecting the current driving direction of the vehicle comprises: and judging the driving direction of the vehicle according to the change of the longitude value and the latitude value of the vehicle.
7. The temperature compensation method of a solar air conditioner for a vehicle according to claim 1, wherein the indoor environment data includes: the opaque envelope of automobile body spreads into the heat time by time, window glass spreads into the heat time by time, passenger's heat dissipation capacity, electrical equipment heat dissipation capacity and/or the heat that new trend air exchange system spreads into.
8. The method as claimed in claim 1, wherein the sun light compensation for the different regions of the vehicle according to the functional relationship between the sun light intensity and the temperature compensation coefficient includes multiplying the sun light intensity by the temperature compensation coefficient as the temperature compensation value for the different regions of the vehicle.
9. A temperature compensation system of a solar air conditioner for a vehicle using the method according to any one of claims 1 to 8, comprising: the first detection unit is used for detecting a sun inclination angle, a time difference, a local sun time, a sun altitude angle, an azimuth angle and a sun incident angle so as to calculate the position of the sun; the second detection unit is used for detecting the direct solar radiation intensity value, the solar radiation scattering intensity value and the hourly air temperature and humidity of the design day; the third detection unit is used for detecting the current longitude value and the current latitude value of the vehicle and the current driving direction of the vehicle; the judging unit is used for judging the position relation between the sun and the vehicle according to the magnitude relation between the position of the sun and the latitude value of the vehicle and the longitude value of the position of the sun; the outdoor environment determining unit is used for calling average meteorological data of the same day of the place in recent years to determine outdoor environment data according to the position and season of the vehicle; the calculation unit is used for calculating a plurality of temperature compensation coefficients of the area where the vehicle is located according to the hourly air temperature, the outdoor environment data and the indoor environment data of the design day and storing the temperature compensation coefficients in the database; the control unit is used for controlling the single-zone light intensity sensor to detect the sunlight intensity; and the compensation unit is used for inquiring the corresponding temperature compensation coefficient in a database according to the corresponding relation between the driving direction of the vehicle, the position relation between the sun and the vehicle and the temperature compensation coefficient of the area where the vehicle is located, and carrying out sunlight compensation on different areas of the vehicle according to the functional relation between the sunlight intensity and the temperature compensation coefficient so as to realize the temperature compensation.
CN201710210108.7A 2017-03-31 2017-03-31 Temperature compensation method and system of solar air conditioner for vehicle CN106864205B (en)

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