CN116512853A - Automobile air conditioning system and control method thereof - Google Patents

Abstract

The invention provides an automobile air conditioning system and a control method thereof, wherein an evaporation temperature sensor is fixedly arranged on one side of a cold core, which is close to a warm core, and a unique air outlet temperature sensor is arranged on the inner wall of an air conditioning box between the warm core and an air outlet, so that the number of the air outlet temperature sensors in the traditional automobile air conditioning system is effectively reduced, one end, which is close to the air outlet temperature sensor, of the warm core is abutted against one end, which is movably connected to the inner wall of the air conditioning box, of a first air door, which is far away from the cold core, the first air door is used for controlling the air quantity which is fed into the warm core, corresponding second air doors are arranged at each air outlet, and the second air doors are used for controlling the air outlet and the air quantity of the corresponding air outlets.

Description

Automobile air conditioning system and control method thereof

Technical Field

The invention belongs to the technical field of automobile air conditioners, and particularly relates to an automobile air conditioner system and a control method thereof.

Background

With the development of society, automobiles become one of the indispensable vehicles for people to travel, and environmental comfort during driving is also receiving increasing attention.

The environmental temperature in the vehicle belongs to one of indexes for evaluating environmental comfort, and the environmental temperature in the vehicle needs to be regulated through an air conditioner of the vehicle, and it is to be noted that the air conditioner system of the vehicle is one of three small powers of the electric vehicle, and the energy consumption of the air conditioner system is the second position of the pure electric vehicle, wherein an electric compressor and a PTC (Positive Temperature Coefficient, positive temperature coefficient resistance) heater are main energy consumption generating components of the air conditioner system. The evaporating temperature sensor and the air outlet temperature sensor are important input signals for controlling the thermal comfort and energy saving of the air conditioner control module so as to control the running power of the voltage compressor and the PTC heater.

At present, a plurality of air conditioning outlets such as a face blowing outlet, a defrosting outlet, a foot blowing outlet and the like of an electric automobile are all provided with special pipelines, corresponding air outlet temperature sensors are installed at all outlets and used for monitoring the air outlet temperature of all positions so as to carry out regional temperature adjustment, and although the arrangement mode can accurately adjust the temperature of all regions, the sensitivity of a human body to the change of the temperature is not high, a certain waste is caused to resources, and finally the manufacturing cost of the whole air conditioning system is high.

Disclosure of Invention

Based on the above, the embodiment of the invention provides an automobile air conditioning system and a control method thereof, which aim to solve the problem of high manufacturing cost of an electric automobile air conditioning system in the prior art.

The first aspect of the embodiment of the invention provides an automobile air conditioning system, which comprises an air conditioning box, and a blower, a cold core, a warm core and a plurality of air outlets which are arranged in the air conditioning box and are sequentially and fixedly arranged according to the air flow direction, wherein an evaporation temperature sensor is fixedly arranged on one side of the cold core, which is close to the warm core, and an air outlet temperature sensor is arranged on the inner wall of the air conditioning box between the warm core and the air outlets, one end, which is close to the air outlet temperature sensor, of the warm core is abutted against one end, which is movably connected with the inner wall of the air conditioning box, of a first air door, which is far away from the cold core, of the first air door is used for controlling the air quantity fed into the warm core, and corresponding second air doors are arranged at the air outlets and are used for controlling the air outlet and the air quantity of the corresponding air outlets.

Further, the air outlet temperature sensor is used for detecting the temperature of the air which is evenly mixed after being output from the cold core and the warm core respectively

Further, a third air door is arranged at the air inlet of the air blower, and the third air door is movably connected to the inner wall of the air conditioner and used for controlling the outside or the outside air to flow into the air blower.

Further, in the air conditioning box, a containing cavity is arranged between the warm core and the air blower, wherein the middle part of the containing cavity is used for placing the cold core and is adapted to the cold core, and the containing space at two sides of the containing cavity is smaller than the containing space at the middle part of the containing cavity.

Further, an included angle between the inner wall of the air conditioning box, which is close to one side of the blower, of the accommodating cavity and the cold core is 15-30 degrees, and an included angle between the inner wall of the air conditioning box, which is close to one side of the warm core, of the accommodating cavity and the cold core is 60-75 degrees.

Further, the fixing portion extends outwards from the inner wall of the air conditioning box, one end, far away from the air outlet temperature sensor, of the heating core is fixedly connected with the fixing portion, and the fixing portion is used for being matched with the first air door, so that the heating core is obliquely fixed in the air conditioning box.

Further, the included angle between the warm core and the cold core is 30-45 degrees.

Further, a first abutting portion is arranged on the inner wall of the air conditioning box at one side, far away from the fixing portion, of the air conditioning box, the surface height of the first abutting portion is lower than the surface height, close to the cooling core, of the inner wall of the air conditioning box at the same side, and the first abutting portion is used for limiting the first air door.

Further, a second abutting portion is arranged at a position corresponding to the inner wall of the air conditioning box at each air outlet, and the second abutting portion is used for limiting the second air door.

Further, the air outlet temperature sensor is located in the middle area in the air conditioning box.

A second aspect of an embodiment of the present invention provides a control method for an automotive air conditioning system, which is applied to the automotive air conditioning system, where the method includes:

acquiring an air conditioner starting instruction, controlling a blower, a cold core and a warm core to start working according to the air conditioner starting instruction, reaching initial power, and simultaneously controlling a corresponding first air door and a corresponding second air door to rotate to initial positions;

and acquiring air conditioning adjustment information, controlling the blower, the cold core and the warm core to reach preset power according to the air conditioning adjustment information, and controlling the first air door and the second air door to rotate to preset positions.

The automobile air conditioning system and the control method thereof provided by the embodiment of the invention have the following beneficial effects:

through set firmly evaporation temperature sensor in the cold core one side that is close to warm core, and install unique air-out temperature sensor on the air conditioning case inner wall between warm core and air outlet, effectively reduced the air-out temperature sensor quantity in the traditional vehicle air conditioning system, the warm core is close to air-out temperature sensor's one end and swing joint keep away from the cold core the one end with the first air door on the air conditioning case inner wall and support and lean on, first air door is used for controlling the amount of wind that lets in warm core, each air outlet department is provided with the second air door that corresponds, the second air door is used for controlling the air-out of corresponding air outlet and the amount of wind that goes out, specifically, use with each second air door cooperation through unique air-out temperature sensor, can not influence each regional temperature regulation when controlling whole manufacturing cost.

Drawings

Fig. 1 is a schematic structural diagram of an air conditioning system for an automobile according to a first embodiment of the present invention;

fig. 2 is a flowchart of a control method of an automotive air conditioning system according to a second embodiment of the present invention.

The following detailed description will be further described with reference to the above-described drawings.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1, fig. 1 shows a schematic structural diagram of an automotive air conditioning system according to a first embodiment of the present invention, where the automotive air conditioning system includes an air conditioning box, and a blower 1, a cooling core 2, a heating core 3, and a plurality of air outlets sequentially disposed in the air conditioning box according to a wind flow direction, where a first outlet may be a blowing face outlet, a second outlet may be a defrosting outlet, and a third outlet may be a blowing foot outlet.

Specifically, be equipped with air-blower 1 in the air conditioning case, cold core 2, warm core 3 and a plurality of air outlet, wherein, warm core 3 includes air PTC heater (positive temperature effect electric heater), traditional heater core (core inside walks coolant), one of type heat exchangers such as indoor heat exchanger (core inside walks coolant), or a plurality of, cold core 2 includes one or more in evaporimeter or other heat exchangers, it can understand that the wind gets into the air conditioning case from air-blower 1 one end of air conditioning case, output to the driver's cabin from the air outlet of air conditioning case, it is that air-blower 1's air intake department is provided with third air door 53, third air door 53 swing joint is in the air conditioning case inner wall for control outside or inside gas inflow air-blower 1, third air door 53 can understand as the air door of the inside and outside circulation of control air, wherein, the one end and the air conditioning case inner wall are articulated, and through motor control third air door 53 rotation, what needs to be interpreted, when third air door 53 rotates to the extreme right side, then carry out the inner circulation, when third air door 53 rotates to the extreme left side, then carries out the electric motor control outside air door 53, this is little with the second air door and the second air door is outside the same, the second is in the second embodiment mode and the second is different from the actual condition that the second air door is in the fact that the outside air door is in the same, the second mode is not really used to be used for the air door 51, the fact is different from the fact that the second air door is in the fact is in the mode to be used to be in the mode.

Further, in the air conditioning case, be provided with between warm core 3 and air-blower 1 and hold the cavity, wherein, the middle part that holds the cavity is used for placing cold core 2, and with cold core 2 adaptation, guarantee promptly that the wind energy that exports from air-blower 1 can all pass through from cold core 2, and further, hold the accommodation space at cavity both sides and be less than the accommodation space that holds the cavity middle part, be the both ends little, the structure big in the middle, in this embodiment, the contained angle between the air conditioning incasement wall that holds the cavity is close to air-blower 1 one side and cold core 2 is 15 ~ 30, contained angle between the air conditioning incasement wall that holds the cavity and cold core 2 that is close to warm core 3 one side is 60 ~ 75, the benefit that sets up like this is in that when making the wind energy that exports from air-blower 1 get into cold core 2 fast, have the output from cold core 2 of certain directionality, and get into follow-up warm core 3, on the other hand, make the utilization efficiency of cold core 2 obtain promoting.

Specifically, an evaporating temperature sensor 4 is fixed on one side of the cooling core 2 near the heating core 3, in this embodiment, the evaporating temperature sensor 4 is installed in the air conditioning box in an inserting manner, wherein the inserting manner refers to a form that the sensor is inserted onto the evaporator heat exchange fin, and the evaporating temperature sensor 4 is installed in the middle area of the cooling core 2 and is used for detecting the temperature of the air output from the cooling core 2, in this embodiment, one end of the heating core 3 near the air outlet temperature sensor 5 abuts against one end of the first air door 51 movably connected to the inner wall of the air conditioning box, far away from the cooling core 2, in addition, one end of the heating core 3 far away from the air outlet temperature sensor 5 is fixedly connected with the fixing portion 6, the fixing portion 6 is used for being matched with the first air door 51, so that the heating core 3 is obliquely fixed in the air conditioning box, it is required to be noted that the abutting position of the heating core 3 and the first air door 51 can be provided with a preset area for making the air leak free, and the sealing strip can be installed in the same place as the preset position.

In order to ensure the overall size, i.e. the integration level, of the air conditioning case and to ensure the working efficiency of the warm core 3, and at the same time, to ensure that the selection angle of the first air door 51 is not too large, the included angle between the warm core 3 and the cold core 2 is set to be 30 ° to 45 °, it is to be noted that the first abutting portion 71 is provided on the inner wall of the air conditioning case on the side far from the fixed portion 6 in the air conditioning case, the surface height of the first abutting portion 71 is lower than the surface height of the inner wall of the air conditioning case on the same side near the cold core 2, the first abutting portion 71 is used for limiting the first air door 51, i.e. the inner wall of the air conditioning case on the side far from the fixed portion 6 in the air conditioning case is not a plane, but two or more planes with a height difference, wherein when the air output from the cold core 2 needs to pass through the warm core 3 entirely, the first air door 51 is controlled to rotate until the first abutting portion 71 abuts against the first abutting portion 71 due to the existence of the plane difference, and when the air output from the cold core 2 does not pass through the warm core 3.

Further, an air outlet temperature sensor 5 is installed on the inner wall of the air conditioning box between the warm core 3 and the air outlet, the air outlet temperature sensor 5 is located in a preset area in the air conditioning box, the air outlet temperature sensor 5 located in the preset area is used for detecting the temperature of the uniformly mixed air output from the cold core 2 and the warm core 3, and outputting the air conditioning air under the rotation of a corresponding second air door 52, wherein the first air door 51 is used for controlling the air quantity introduced into the warm core 3, the corresponding second air door 52 is arranged at each air outlet, the second air door 52 is used for controlling the corresponding air outlet and the air outlet quantity, a second abutting part 72 is arranged at the corresponding position of the inner wall of the air conditioning box at each air outlet, the second abutting part 72 is used for limiting the second air door 52, and it can be understood that an air outlet temperature sensor is arranged in the area, namely, the air outlet temperature sensor can replace the conventional face-blowing air outlet temperature sensor, foot-blowing air outlet temperature sensor and the air outlet comfort and the energy-saving algorithm are not influenced. Therefore, the whole vehicle can save at least one air outlet temperature sensor, one wire harness branch and one air conditioner control module temperature acquisition interface, and the manufacturing cost is effectively reduced.

It should be noted that, in order to determine the specific installation position of the wind temperature sensor 5, CFD (Computational Fluid Dynamics ) analysis and physical verification can be used to confirm that the first air door 51 is located at any adjustable position, and is located in an area where the wind temperature sensor 5 is located, where cold air and warm air are fully mixed, and the area is selected by developing early CAE (Computer Aided Engineering, computer aided engineering in engineering design) analysis and later physical test optimization, where specific CAE analysis and physical part test conditions are as follows:

it will be appreciated that when the first damper position is fully cold, i.e. the first damper 51 is uppermost, it is in close contact with the warm core 3, and when the first damper position is fully hot, i.e. the first damper 51 is lowermost, it is in abutment with the inner wall of the air conditioning case, in this embodiment the rotatable angle of the first damper 51 is divided into 16, and at each position, a relevant verification experiment is performed to determine the final position of the outlet air temperature sensor 5.

In summary, according to the automobile air conditioning system provided by the invention, the evaporation temperature sensor is fixedly arranged on one side of the cold core, which is close to the warm core, and the unique air outlet temperature sensor is arranged on the inner wall of the air conditioning box between the warm core and the air outlet, so that the number of the air outlet temperature sensors in the traditional automobile air conditioning system is effectively reduced, one end, which is close to the air outlet temperature sensor, of the warm core is abutted against one end, which is movably connected to the inner wall of the air conditioning box, of the first air door, which is far away from the cold core, and the first air door is used for controlling the air quantity which is fed into the warm core, and the corresponding second air door is arranged at each air outlet and used for controlling the air outlet and the air quantity of the corresponding air outlet.

Example two

Referring to fig. 2, a flowchart of a control method of an automotive air conditioning system according to a second embodiment of the present invention is shown, where the method specifically includes:

and S01, acquiring an air conditioner starting instruction, controlling the blower, the cold core and the warm core to start working according to the air conditioner starting instruction, reaching initial power, and simultaneously controlling the corresponding first air door and second air door to rotate to initial positions.

Specifically, an air conditioner starting instruction is obtained, that is, the air conditioner is started through an air conditioner switching key, at this time, because the system receives the air conditioner starting instruction, and controls the blower, the cold core and the warm core to start working according to the air conditioner starting instruction, and initial power is reached, generally, the initial power is the power when the air conditioner works last time, in other embodiments, the initial power can also be the default power of the system, and the corresponding first air door and second air door are controlled to rotate to the initial position in the same way.

And step S02, acquiring air conditioner adjusting information, controlling the blower, the cold core and the warm core to reach preset power according to the air conditioner adjusting information, and controlling the first air door and the second air door to rotate to preset positions.

It should be noted that, firstly, an adjustment model is established, specifically, through calibrating the air volume and the temperature of each air outlet corresponding to different blower power, cold core power, warm core power, first air door rotation angle and second air door rotation angle in advance, a mapping relationship between the cold core power, warm core power, first air door rotation angle, second air door rotation angle and air volume and temperature is established, wherein the air volume can be detected by an air volume detection device, the temperature can be obtained by an air outlet temperature sensor, and calibrated by an additional standard temperature sensor, the air outlet temperature sensor can be used for knowing whether the temperature adjusted at the moment is the designated temperature, it can be understood that when the air conditioning adjustment information, such as the designated air volume and the designated temperature, is obtained, at the moment, the designated air volume and the designated temperature are input into the adjustment model, namely, the blower power, the cold core power, the warm core power, the first air door rotation angle and the second rotation angle corresponding to the designated air volume and the designated temperature are queried and called, and the blower, the cold core, the warm core, the first air door and the second air door rotation angle are all connected with a controller, and the air door can be controlled simultaneously, and the air conditioner air door can be controlled.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims (10)

1. The utility model provides an automobile air conditioning system, its characterized in that, the system includes the air conditioning case, and arranges in the air conditioning case, and according to the air flow direction fixed air-blower, cold core, warm core and a plurality of air outlet that set gradually, wherein the cold core is close to one side of warm core has set firmly evaporation temperature sensor, and warm core with install air outlet temperature sensor on the air conditioning case inner wall between the air outlet, the warm core is close to air outlet temperature sensor's one end is kept away from with swing joint on the air conditioning case inner wall the one end of cold core is held against, first air door is used for controlling the air quantity of letting in the warm core, each air outlet department is provided with corresponding second air door, the second air door is used for controlling corresponding air outlet and air quantity.

2. The vehicle air conditioning system according to claim 1, wherein the outlet air temperature sensor is configured to detect a temperature of the uniformly mixed air after being output from the cooling core and the heating core, respectively.

3. The vehicle air conditioning system according to claim 2, wherein a third damper is provided at an air inlet of the air conditioner box, and the third damper is movably connected to an inner wall of the air conditioner box, and is used for controlling external air or external air to flow into the air conditioner box.

4. The vehicle air conditioning system according to claim 3, wherein an accommodating cavity is disposed between the warm core and the blower in the air conditioning box, wherein a middle portion of the accommodating cavity is used for accommodating the cold core and is adapted to the cold core, and accommodating spaces on two sides of the accommodating cavity are smaller than those in the middle portion of the accommodating cavity.

5. The vehicle air conditioning system according to claim 4, wherein an included angle between an inner wall of the air conditioning case on a side of the accommodating cavity close to the blower and the cooling core is 15 ° to 30 °, and an included angle between an inner wall of the air conditioning case on a side of the accommodating cavity close to the warm core and the cooling core is 60 ° to 75 °.

6. The vehicle air conditioning system according to claim 5, wherein a fixing portion extends outwards from an inner wall of the air conditioning case, an end of the warm core, which is far away from the air outlet temperature sensor, is fixedly connected with the fixing portion, and the fixing portion is used for being matched with the first air door, so that the warm core is obliquely fixed in the air conditioning case.

7. The vehicle air conditioning system of claim 6, wherein an included angle between the warm core and the cold core is 30 ° to 45 °.

8. The vehicle air conditioning system according to claim 7, wherein a first abutting portion is provided on an inner wall of the air conditioning case on a side of the air conditioning case away from the fixing portion, a surface height of the first abutting portion is lower than a surface height of the inner wall of the air conditioning case on the same side, which is close to the cooling core, and the first abutting portion is used for limiting the first damper.

9. The vehicle air conditioning system according to claim 8, wherein a second abutment portion is provided at a position corresponding to an inner wall of the air conditioning case at each of the air outlets, the second abutment portion being configured to limit the second damper.

10. A control method of an air conditioning system for a vehicle, applied to the air conditioning system for a vehicle according to any one of claims 1 to 9, characterized in that the method comprises:

acquiring an air conditioner starting instruction, controlling a blower, a cold core and a warm core to start working according to the air conditioner starting instruction, reaching initial power, and simultaneously controlling a corresponding first air door and a corresponding second air door to rotate to initial positions;

and acquiring air conditioning adjustment information, controlling the blower, the cold core and the warm core to reach preset power according to the air conditioning adjustment information, and controlling the first air door and the second air door to rotate to preset positions.