CN113085480B - Vehicle-mounted air conditioning system and control method thereof - Google Patents
Vehicle-mounted air conditioning system and control method thereof Download PDFInfo
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- CN113085480B CN113085480B CN202110372617.6A CN202110372617A CN113085480B CN 113085480 B CN113085480 B CN 113085480B CN 202110372617 A CN202110372617 A CN 202110372617A CN 113085480 B CN113085480 B CN 113085480B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
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Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to a vehicle-mounted air conditioning system and a control method thereof. The invention aims to solve the problem of poor structural design of the conventional vehicle-mounted air conditioning system. Therefore, the vehicle-mounted air conditioning system comprises a refrigerant circulation loop, a heat exchange air duct, a first internal circulation air duct, a second internal circulation air duct, a first external circulation air duct and a second external circulation air duct, wherein an in-vehicle heat exchanger is arranged in the heat exchange air duct. The control method can correspondingly control the operation of the vehicle-mounted air conditioning system according to the acquired in-vehicle temperature, the in-vehicle temperature target value, the air outlet temperature and the air outlet temperature target value.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a vehicle-mounted air conditioning system and a control method thereof.
Background
With the continuous development of air conditioning technology, an air conditioner becomes one of essential devices in people's life, and is not exceptional during riding, and most of the existing vehicles are provided with vehicle-mounted air conditioning systems so as to bring better riding experience to passengers. For large vehicles (such as trains), the vehicle-mounted air conditioning system exchanges heat not only with air in the vehicle, but also introduces external air. Specifically, the existing vehicle-mounted air conditioning system is generally provided with an internal circulation air duct and an external circulation air duct, wherein the internal circulation air duct is used for introducing air inside the vehicle into the vicinity of the heat exchanger for heat exchange and then returning the air back into the vehicle compartment, and the external circulation air duct is used for introducing air outside the vehicle into the vicinity of the heat exchanger for heat exchange and then introducing the air into the vehicle. In a word, the air flows introduced by the internal circulation air duct and the external circulation air duct are sent into the carriage after heat exchange through the heat exchanger, however, part of air-conditioning compressors of the vehicle are driven by the engine of the vehicle, and the rotating speed of the compressors cannot be adjusted, so that the temperature of the evaporator is easily in a too low state, which directly leads to the problems that the outlet air temperature is too low and users feel uncomfortable.
Accordingly, there is a need in the art for a new on-board air conditioning system and a control method thereof to solve the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the structural design of the existing vehicle-mounted air conditioning system is not good and the air outlet is uncomfortable, the invention provides a control method for a vehicle-mounted air conditioning system, wherein the vehicle-mounted air conditioning system comprises a refrigerant circulation loop, a heat exchange air duct, a first internal circulation air duct, a second internal circulation air duct, a first external circulation air duct and a second external circulation air duct, wherein an in-vehicle heat exchanger is arranged on the refrigerant circulation loop, the in-vehicle heat exchanger is arranged in the heat exchange air duct, the heat exchange air duct is used for supplying air to the interior of the vehicle, the air inlet ends of the first internal circulation air duct and the second internal circulation air duct are communicated with the interior of the vehicle, the air outlet end of the first internal circulation air duct is communicated with the heat exchange air duct, the connection position of the first internal circulation air duct is located at the upstream of the in-vehicle heat exchanger, the air outlet end of the second internal circulation air duct is communicated with the heat exchange air duct, and the connection position of the second internal circulation air duct is located at the downstream of the heat exchanger The air inlet ends of the first external circulation air duct and the second external circulation air duct are communicated with the outside of the vehicle, the air outlet end of the first external circulation air duct is communicated with the heat exchange air duct, the joint of the first external circulation air duct and the heat exchange air duct is positioned at the upstream of the heat exchanger in the vehicle, the air outlet end of the second external circulation air duct is communicated with the heat exchange air duct, the joint of the second external circulation air duct and the heat exchange air duct is positioned at the downstream of the heat exchanger in the vehicle, and the control method comprises the following steps: acquiring an in-vehicle temperature and an in-vehicle temperature target value; controlling the communication states of the first internal circulation air duct and the first external circulation air duct and the heat exchange air duct according to the temperature in the vehicle and the target value of the temperature in the vehicle; acquiring an air outlet temperature and an air outlet temperature target value; and controlling the communication states of the second internal circulation air duct and the second external circulation air duct and the heat exchange air duct according to the air outlet temperature, the air outlet temperature target value and the communication states of the first internal circulation air duct and the first external circulation air duct and the heat exchange air duct.
In a preferred technical solution of the above control method, the step of controlling the communication states of the first internal circulation air duct and the first external circulation air duct with the heat exchange air duct according to the in-vehicle temperature and the in-vehicle temperature target value includes: and if the absolute value of the difference value between the target value of the temperature in the vehicle and the temperature in the vehicle is greater than or equal to a first preset difference value, controlling the first internal circulation air duct to be communicated with the heat exchange air duct.
In a preferred technical solution of the above control method, the step of controlling the communication states of the second inner circulation air duct and the second outer circulation air duct with the heat exchange air duct according to the outlet air temperature, the outlet air temperature target value, and the communication states of the first inner circulation air duct and the first outer circulation air duct with the heat exchange air duct includes: and under the condition that the first internal circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference value between the target value of the air outlet temperature and the air outlet temperature is greater than a second preset difference value and less than or equal to a third preset difference value, controlling the second internal circulation air duct to be communicated with the heat exchange air duct.
In a preferred technical solution of the above control method, the step of controlling the communication states of the second inner circulation air duct and the second outer circulation air duct and the heat exchange air duct according to the outlet air temperature, the outlet air temperature target value, and the communication states of the first inner circulation air duct and the first outer circulation air duct and the heat exchange air duct further includes: and under the condition that the first internal circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference value between the target value of the air outlet temperature and the air outlet temperature is less than or equal to the second preset difference value, controlling the second internal circulation air duct and the second external circulation air duct to be communicated with the heat exchange air duct.
In a preferred technical solution of the above control method, the step of controlling the communication states of the second internal circulation air duct and the second external circulation air duct with the heat exchange air duct according to the outlet air temperature, the outlet air temperature target value, and the communication states of the first internal circulation air duct and the first external circulation air duct with the heat exchange air duct further includes: and under the condition that the first internal circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference value between the target value of the air outlet temperature and the air outlet temperature is greater than the third preset difference value, controlling the second internal circulation air duct and the second external circulation air duct not to be communicated with the heat exchange air duct.
In a preferred technical solution of the above control method, the step of controlling the communication states of the first internal circulation air duct and the first external circulation air duct with the heat exchange air duct according to the in-vehicle temperature and the in-vehicle temperature target value further includes: and if the absolute value of the difference value between the target value of the temperature in the vehicle and the temperature in the vehicle is smaller than the first preset difference value and larger than a fourth preset difference value, controlling the first external circulation air duct to be communicated with the heat exchange air duct.
In a preferred technical solution of the above control method, the step of controlling the communication states of the second inner circulation air duct and the second outer circulation air duct with the heat exchange air duct according to the outlet air temperature, the outlet air temperature target value, and the communication states of the first inner circulation air duct and the first outer circulation air duct with the heat exchange air duct includes: and under the condition that the first external circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference value between the target value of the air outlet temperature and the air outlet temperature is greater than a fifth preset difference value and less than or equal to a sixth preset difference value, controlling the second external circulation air duct to be communicated with the heat exchange air duct.
In a preferred technical solution of the above control method, the step of controlling the communication states of the second inner circulation air duct and the second outer circulation air duct and the heat exchange air duct according to the outlet air temperature, the outlet air temperature target value, and the communication states of the first inner circulation air duct and the first outer circulation air duct and the heat exchange air duct further includes: and under the condition that the first external circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference between the target value of the air outlet temperature and the air outlet temperature is less than or equal to the fifth preset difference, controlling the second internal circulation air duct and the second external circulation air duct to be communicated with the heat exchange air duct.
In a preferred technical solution of the above control method, the step of controlling the communication states of the second inner circulation air duct and the second outer circulation air duct and the heat exchange air duct according to the outlet air temperature, the outlet air temperature target value, and the communication states of the first inner circulation air duct and the first outer circulation air duct and the heat exchange air duct further includes: and under the condition that the first external circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference value between the target value of the air outlet temperature and the air outlet temperature is greater than the sixth preset difference value, controlling the second internal circulation air duct and the second external circulation air duct not to be communicated with the heat exchange air duct.
The invention also provides a vehicle-mounted air conditioning system which comprises a refrigerant circulation loop, a heat exchange air duct, a first internal circulation air duct, a second internal circulation air duct, a first external circulation air duct and a second external circulation air duct, wherein an in-vehicle heat exchanger is arranged on the refrigerant circulation loop, the in-vehicle heat exchanger is arranged in the heat exchange air duct, the heat exchange air duct is used for supplying air to the interior of a vehicle, the air inlet ends of the first internal circulation air duct and the second internal circulation air duct are communicated with the interior of the vehicle, the air outlet end of the first internal circulation air duct is communicated with the heat exchange air duct, the connection position of the air outlet end of the first internal circulation air duct and the heat exchange air duct is positioned at the upstream of the in-vehicle heat exchanger, the air outlet end of the second internal circulation air duct is communicated with the heat exchange air duct, the connection position of the air outlet end of the first external circulation air duct and the air inlet end of the second external circulation air duct are communicated with the exterior of the vehicle, the air outlet end of the first external circulation air duct is communicated with the heat exchange air duct, the joint of the first external circulation air duct and the heat exchange air duct is positioned at the upstream of the heat exchanger in the vehicle, the air outlet end of the second external circulation air duct is communicated with the heat exchange air duct, and the joint of the second external circulation air duct and the heat exchange air duct is positioned at the downstream of the heat exchanger in the vehicle.
As can be understood by those skilled in the art, in a preferred embodiment of the present invention, the vehicle air conditioning system includes a refrigerant circulation loop, a heat exchange air duct, a first internal circulation air duct, a second internal circulation air duct, a first external circulation air duct, and a second external circulation air duct, an internal heat exchanger is disposed on the refrigerant circulation loop, the internal heat exchanger is disposed in the heat exchange air duct, the heat exchange air duct is used for supplying air to the vehicle, air inlet ends of the first internal circulation air duct and the second internal circulation air duct are communicated with the vehicle interior, an air outlet end of the first internal circulation air duct is communicated with the heat exchange air duct and a connection point thereof is located at an upstream of the internal heat exchanger, an air outlet end of the second internal circulation air duct is communicated with the heat exchange air duct and a connection point thereof is located at a downstream of the internal heat exchanger, air inlet ends of the first external circulation air duct and the second external circulation air duct are communicated with the outside of the vehicle, the air outlet end of the first external circulation air duct is communicated with the heat exchange air duct, the joint of the first external circulation air duct and the heat exchange air duct is positioned at the upstream of the heat exchanger in the vehicle, the air outlet end of the second external circulation air duct is communicated with the heat exchange air duct, and the joint of the second external circulation air duct and the heat exchange air duct is positioned at the downstream of the heat exchanger in the vehicle. According to the invention, the second internal circulation air duct is additionally arranged to introduce air in the vehicle which does not exchange heat and air which exchanges heat to be mixed and then sent into the vehicle, so that the air outlet temperature is effectively regulated, and the air outlet temperature can be stabilized in a comfortable range; in addition, the second external circulation air duct is additionally arranged to introduce air outside the vehicle without heat exchange to be mixed with the air after heat exchange and then to be sent into the vehicle, so that the air outlet temperature is effectively adjusted, and meanwhile, fresh air outside the vehicle can be introduced into the vehicle, so that the freshness of the air inside the vehicle and the comfort level of the air outlet temperature are both considered.
Based on the above structural arrangement, the control method of the present invention includes: acquiring an in-vehicle temperature and an in-vehicle temperature target value; controlling the communication states of the first internal circulation air duct and the first external circulation air duct and the heat exchange air duct according to the temperature in the vehicle and the target value of the temperature in the vehicle; acquiring an air outlet temperature and an air outlet temperature target value; and controlling the communication states of the second internal circulation air duct and the second external circulation air duct and the heat exchange air duct according to the air outlet temperature, the air outlet temperature target value and the communication states of the first internal circulation air duct and the first external circulation air duct and the heat exchange air duct. According to the invention, different combined air supply modes are realized through the control logic, so that on the basis of ensuring comfortable air outlet, the freshness of air in the vehicle can be better considered, and better heat exchange experience is brought to users.
Drawings
FIG. 1 is a schematic structural diagram of an in-vehicle air conditioning system of the present invention;
FIG. 2 is a flow chart of the main steps of the control method of the present invention;
reference numerals are as follows:
11. a heat exchange air duct; 111. an in-vehicle heat exchanger; 112. an air outlet; 113. a heat exchange fan;
12. a first internal circulation air duct; 121. a first filter member;
13. a second internal circulation air duct; 131. a second filter member;
14. a first external circulation air duct; 141. a third filter member;
15. a second external circulation air duct; 151. a fourth filter member.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. It should be noted that in the description of the preferred embodiment, the terms "upper", "lower", "left", "right", "horizontal", "vertical", "inner", "outer", and the like indicate directions or positional relationships based on those shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" is to be understood broadly, and may be, for example, directly connected, indirectly connected through an intermediate, or communicating between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In addition, it should be noted that, in the description of the present invention, although the steps of the control method of the present invention are described in a specific order in the present application, the order is not limited, and those skilled in the art may perform the steps in a different order without departing from the basic principle of the present invention.
Referring first to fig. 1, a schematic structural diagram of a vehicle air conditioning system according to the present invention is shown. As shown in fig. 1, the vehicle-mounted air conditioning system of the present invention includes a refrigerant circulation loop, a heat exchange air duct 11, a first internal circulation air duct 12, a second internal circulation air duct 13, a first external circulation air duct 14, and a second external circulation air duct 15, wherein an in-vehicle heat exchanger 111 is disposed on the refrigerant circulation loop, the in-vehicle heat exchanger 111 is disposed in the heat exchange air duct 11, and the heat exchange air duct 11 is used for supplying air to the inside of the vehicle. It should be noted that, the present invention does not limit the specific structure of the refrigerant circulation loop, as long as the refrigerant circulation loop is provided with the in-vehicle heat exchanger 111, and the in-vehicle heat exchanger 111 is disposed in the heat exchange air duct 11. In the preferred embodiment, the whole shape of the heat exchange air duct 11 is "T" shaped, four air outlets 112 are arranged in the horizontal portion of the heat exchange air duct, the heat exchanger 111 in the vehicle is arranged in the vertical portion of the heat exchange air duct, a heat exchange fan 113 is further arranged in the vertical portion of the heat exchange air duct, the heat exchange fan 113 is arranged below the heat exchanger 111 in the vehicle, and directional air flow formed by the heat exchange fan 113 is blown into the vehicle through the four air outlets 112 after heat exchange by the heat exchanger 111 in the vehicle, so that heat exchange is realized. Of course, the present invention does not limit the specific shape of the heat exchange air duct 11 and the specific number of the air outlets 112, and the skilled person can set the shape according to the actual use requirement.
With continued reference to fig. 1, the air inlet end (i.e., the right end in the drawing) of the first internal circulation air duct 12 is communicated with the interior of the vehicle so as to introduce air in the vehicle; the air outlet end (i.e. the left end in the figure) of the first internal circulation air duct 12 is communicated with the heat exchange air duct 11, the connection position of the first internal circulation air duct is located at the upstream of the vehicle interior heat exchanger 111 (i.e. the lower side of the vehicle interior heat exchanger 111 in the figure), and the connection position of the first internal circulation air duct 12 is provided with a first filtering member 121. Of course, the present invention does not limit the specific shape of the first internal circulation duct 12 and the specific type of the first filter member 121, and the skilled person can set the shape according to the actual use requirement. The air inlet end (i.e. the left end in the figure) of the second internal circulation air duct 13 is communicated with the interior of the vehicle so as to introduce air in the vehicle; the air outlet end (i.e., the right end in the figure) of the second internal circulation air duct 13 is communicated with the heat exchange air duct 11, the connection position of the second internal circulation air duct is located at the downstream of the vehicle interior heat exchanger 111 (i.e., the upper side of the vehicle interior heat exchanger 111 in the figure), and the connection position of the second internal circulation air duct 13 is provided with a second filter member 131. Of course, the present invention does not limit the specific shape of the second internal circulation duct 13 and the specific type of the second filter member 131, and the skilled person can set the shape according to the actual use requirement. The air inlet end (i.e., the right end in the drawing) of the first external circulation air duct 14 is communicated with the outside of the vehicle so as to introduce air outside the vehicle; the air outlet end (i.e. the left end in the figure) of the first external circulation air duct 14 is communicated with the heat exchange air duct 11, the connection position of the first external circulation air duct is located at the upstream of the vehicle interior heat exchanger 111, and the connection position of the first external circulation air duct is provided with a third filtering member 141. Of course, the present invention does not limit the specific shape of the first external circulation duct 14 and the specific type of the third filtering member 141, and the skilled person can set the shape according to the actual use requirement. The air inlet end (i.e. the right end in the figure) of the second external circulation air duct 15 is connected to the air inlet end of the first external circulation air duct 14, and is further communicated with the outside of the vehicle so as to introduce air outside the vehicle; the air outlet end (i.e. the left end in the figure) of the second external circulation air duct 15 is communicated with the heat exchange air duct 11, the connection position of the second external circulation air duct is located at the downstream of the vehicle interior heat exchanger 111, and the connection position of the second external circulation air duct is provided with a fourth filtering member 151. As a preferable arrangement, the cross-sectional area of the first external circulation duct 14 is larger than that of the second external circulation duct 15, so as to better regulate the amount of air introduced outside the vehicle. Of course, the present invention does not limit the specific shape of the second external circulation duct 15 and the specific type of the fourth filtering member 151, and the skilled person can set the shape according to the actual use requirement.
Based on the arrangement, the air conditioner introduces the air in the vehicle which does not exchange heat and the air which exchanges heat by additionally arranging the second internal circulation air duct 13, mixes the air and then sends the air into the vehicle, thereby effectively adjusting the air outlet temperature so as to ensure that the air outlet temperature can be stabilized in a comfortable range; in addition, the invention also introduces non-heat-exchanged air outside the vehicle and the heat-exchanged air to be mixed by additionally arranging the second external circulation air duct 15 and then sent into the vehicle, thereby effectively regulating the outlet air temperature and simultaneously introducing fresh air outside the vehicle into the vehicle so as to simultaneously take account of the freshness of the air inside the vehicle and the comfort level of the outlet air temperature.
In addition, it should be noted that, the invention does not limit the application objects of the vehicle-mounted air conditioning system, and technicians can set the application objects according to actual use requirements; for example, the vehicle-mounted air conditioning system can be used for a large bus, a truck and even a train. Such changes in the specific application should not depart from the basic principle of the present invention, and the scope of the present invention should be construed as follows.
Further, the vehicle-mounted air conditioning system further comprises an in-vehicle temperature sensor, an air outlet temperature sensor and a controller, the in-vehicle temperature sensor can detect the in-vehicle temperature, the air outlet temperature sensor can detect the air outlet temperature at the air outlet 112, the controller can acquire detection data of the in-vehicle temperature sensor and the air outlet temperature sensor, and the controller can also control the running state of the vehicle-mounted air conditioning system, for example, control the communication state of the first inner circulation air duct 12 and the first outer circulation air duct 14 with the heat exchange air duct 11, control the communication state of the second inner circulation air duct 13 and the second outer circulation air duct 15 with the heat exchange air duct 11, and the like. It can be understood by those skilled in the art that the present invention does not limit the specific structure and model of the controller, and the controller may be an original controller of the vehicle air conditioning system, or may be a controller separately configured to execute the control method of the present invention, and the skilled person may set the structure and model of the controller according to actual use requirements.
Referring next to fig. 2, a flow chart of the main steps of the control method of the present invention is shown. As shown in fig. 2, based on the vehicle-mounted air conditioning system described in the above preferred embodiment, the control method of the present invention mainly includes the following steps:
s1: acquiring an in-vehicle temperature and an in-vehicle temperature target value;
s2: controlling the communication states of the first internal circulation air duct and the first external circulation air duct and the heat exchange air duct according to the temperature in the vehicle and the target value of the temperature in the vehicle;
s3: acquiring an air outlet temperature and an air outlet temperature target value;
s4: and controlling the communication states of the second internal circulation air duct and the second external circulation air duct and the heat exchange air duct according to the air outlet temperature, the target value of the air outlet temperature and the communication states of the first internal circulation air duct and the first external circulation air duct and the heat exchange air duct.
In step S1, the controller can obtain the in-vehicle temperature and the target in-vehicle temperature, and a technician can set a specific obtaining mode according to actual use requirements; it is understood that the target value of the in-vehicle temperature may be set by the user, or may be determined according to other control methods.
Further, in step S2, the controller can control the communication states of the first inner circulation air duct 12 and the first outer circulation air duct 14 with the heat exchange air duct 11 according to the in-vehicle temperature and the in-vehicle temperature target value. Specifically, if the absolute value of the difference between the target value of the in-vehicle temperature and the in-vehicle temperature is greater than or equal to the first preset difference, the first internal circulation air duct 12 is controlled to be communicated with the heat exchange air duct 11, and the first external circulation air duct 14 is not communicated with the heat exchange air duct 11; if the absolute value of the difference between the target value of the temperature in the vehicle and the temperature in the vehicle is smaller than the first preset difference and larger than the fourth preset difference, controlling the first external circulation air duct 14 to be communicated with the heat exchange air duct 11, and controlling the first internal circulation air duct 12 not to be communicated with the heat exchange air duct 11; if the absolute value of the difference value between the target value of the temperature in the vehicle and the temperature in the vehicle is smaller than or equal to the fourth preset difference value, it is indicated that the temperature in the vehicle is very close to the heat exchange requirement, and the communication state of the temperature in the vehicle can be adjusted according to the requirement of a user. It should be noted that, in the present invention, no limitation is imposed on the specific values of the first preset difference and the fourth preset difference, and a technician can set the values according to actual needs; in addition, the invention does not limit the communication mode of the first internal circulation air duct 12 and the first external circulation air duct 14 with the heat exchange air duct 11, and technicians can set the communication mode according to actual use requirements; for example, dampers may be provided in the ducts of the first inner circulation duct 12 and the first outer circulation duct 14.
It should be noted that, although the comparison result between the absolute value of the difference between the target value of the in-vehicle temperature and the preset difference is used in the preferred embodiment to control the communication state between the first inner circulation air duct 12 and the first outer circulation air duct 14 and the heat exchange air duct 11, this is only a preferred setting mode, and a technician can adjust the setting according to actual use requirements; for example, the communication states of the first inner circulation air duct 12 and the first outer circulation air duct 14 and the heat exchange air duct 11 can also be controlled according to the comparison result of the ratio of the target value of the temperature in the vehicle to the temperature in the vehicle and a preset ratio. Such adjustments as to the specific judgment conditions do not depart from the basic principle of the present invention and fall within the protection scope of the present invention.
In step S3, the controller can obtain the outlet air temperature and the target outlet air temperature value, and a technician can set the specific obtaining mode according to the actual use requirement; it can be understood that the target value of the outlet air temperature may be set by a user, or determined according to other control methods. It should be noted that, the present invention does not limit the execution sequence of step S1 and step S3, and the technician can adjust the sequence according to the actual use requirement; for example, step S1 may be performed first and step S3 may be performed second, step S3 may be performed first and step S1 may be performed first, or both may be performed.
Further, in step S4, the controller can control the communication states of the second internal circulation air duct 13 and the second external circulation air duct 15 with the heat exchange air duct 11 according to the outlet air temperature, the outlet air temperature target value, and the communication states of the first internal circulation air duct 12 and the first external circulation air duct 14 with the heat exchange air duct 11.
Specifically, under the condition that the first internal circulation air duct 12 is communicated with the heat exchange air duct 11, if the absolute value of the difference between the target value of the outlet air temperature and the outlet air temperature is greater than the second preset difference and less than or equal to the third preset difference, the second internal circulation air duct 13 is controlled to be communicated with the heat exchange air duct 11, and the second external circulation air duct 15 is not communicated with the heat exchange air duct 11; if the absolute value of the difference between the target value of the outlet air temperature and the outlet air temperature is less than or equal to the second preset difference, controlling the second inner circulation air duct 13 and the second outer circulation air duct 15 to be communicated with the heat exchange air duct 11; and if the absolute value of the difference between the target air outlet temperature value and the air outlet temperature is greater than the third preset difference, controlling the second inner circulation air duct 13 and the second outer circulation air duct 15 not to be communicated with the heat exchange air duct 11. It should be noted that, the specific values of the second preset difference and the third preset difference are not limited, and a technician can set the values according to actual use requirements; in addition, the invention does not limit the communication mode of the second internal circulation air duct 13 and the second external circulation air duct 15 with the heat exchange air duct 11, and technicians can set the communication mode according to actual use requirements; for example, dampers may be provided in the ducts of the second inner circulation duct 13 and the second outer circulation duct 15.
As a preferable arrangement, the third preset difference is set in relation to a difference between an inside temperature and an outside temperature. Specifically, the larger the absolute value of the difference between the inside temperature and the outside temperature is, the smaller the third preset difference is; and, the smaller the absolute value of the difference of the interior temperature and the exterior temperature is, the larger the third preset difference is, so as to better guarantee the comfort level during heat exchange and improve the heat exchange experience of the user.
Further, under the condition that the first external circulation air duct 14 is communicated with the heat exchange air duct 11, if the absolute value of the difference between the target value of the outlet air temperature and the outlet air temperature is greater than the fifth preset difference and less than or equal to the sixth preset difference, the second external circulation air duct 15 is controlled to be communicated with the heat exchange air duct 11, and the second internal circulation air duct 13 is not communicated with the heat exchange air duct 11; if the absolute value of the difference between the target air outlet temperature and the air outlet temperature is less than or equal to the fifth preset difference, controlling both the second internal circulation air duct 13 and the second external circulation air duct 15 to be communicated with the heat exchange air duct 11; and if the absolute value of the difference between the target air outlet temperature value and the air outlet temperature is greater than the sixth preset difference, controlling the second inner circulation air duct 13 and the second outer circulation air duct 15 not to be communicated with the heat exchange air duct 11. It should be noted that, the specific values of the fifth preset difference and the sixth preset difference are not limited in the present invention, and the technical staff may set the values according to the actual use requirement. As a preferable arrangement, the sixth preset difference is set to be equal to the fourth preset difference.
It should be noted that, although the comparison result between the absolute value of the difference between the target value of the outlet air temperature and the preset difference is used as one of the determination conditions in the preferred embodiment to control the communication states of the second inner circulation air duct 13 and the second outer circulation air duct 15 and the heat exchange air duct 11, this is only a preferred setting manner, and a technician can adjust the setting according to actual needs; for example, the communication states of the second internal circulation air duct 13 and the second external circulation air duct 15 and the heat exchange air duct 11 may also be controlled according to the comparison result between the ratio of the target value of the outlet air temperature and a preset ratio. Such adjustment regarding the specific judgment condition does not depart from the basic principle of the present invention, and belongs to the protection scope of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (5)
1. A control method for a vehicle-mounted air conditioning system is characterized in that the vehicle-mounted air conditioning system comprises a refrigerant circulation loop, a heat exchange air duct, a first internal circulation air duct, a second internal circulation air duct, a first external circulation air duct and a second external circulation air duct,
the refrigerant circulation loop is provided with an in-vehicle heat exchanger which is arranged in the heat exchange air duct, the heat exchange air duct is used for supplying air to the interior of the vehicle,
the air inlet ends of the first internal circulation air duct and the second internal circulation air duct are communicated with the interior of the vehicle, the air outlet end of the first internal circulation air duct is communicated with the heat exchange air duct, the joint of the first internal circulation air duct and the heat exchange air duct is positioned at the upstream of the heat exchanger in the vehicle, the air outlet end of the second internal circulation air duct is communicated with the heat exchange air duct, the joint of the second internal circulation air duct and the heat exchange air duct is positioned at the downstream of the heat exchanger in the vehicle,
the air inlet ends of the first external circulation air duct and the second external circulation air duct are communicated with the outside of the vehicle, the air outlet end of the first external circulation air duct is communicated with the heat exchange air duct, the joint of the air outlet end of the first external circulation air duct and the heat exchange air duct is positioned at the upstream of the heat exchanger in the vehicle, the air outlet end of the second external circulation air duct is communicated with the heat exchange air duct, the joint of the air outlet end of the second external circulation air duct and the heat exchange air duct is positioned at the downstream of the heat exchanger in the vehicle,
the control method comprises the following steps:
acquiring an in-vehicle temperature and an in-vehicle temperature target value;
controlling the communication states of the first internal circulation air duct and the first external circulation air duct and the heat exchange air duct according to the temperature in the vehicle and the target value of the temperature in the vehicle;
acquiring an air outlet temperature and an air outlet temperature target value;
controlling the communication states of the second internal circulation air duct and the second external circulation air duct and the heat exchange air duct according to the air outlet temperature, the air outlet temperature target value and the communication states of the first internal circulation air duct and the first external circulation air duct and the heat exchange air duct;
the step of controlling the communication state of the first internal circulation air duct and the first external circulation air duct with the heat exchange air duct according to the temperature in the vehicle and the target value of the temperature in the vehicle comprises the following steps:
if the absolute value of the difference value between the target value of the temperature in the vehicle and the temperature in the vehicle is greater than or equal to a first preset difference value, controlling the first internal circulation air duct to be communicated with the heat exchange air duct;
the step of controlling the communication states of the second internal circulation air duct and the second external circulation air duct and the heat exchange air duct according to the air outlet temperature, the target air outlet temperature and the communication states of the first internal circulation air duct and the first external circulation air duct and the heat exchange air duct includes:
under the condition that the first internal circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference value between the target value of the air outlet temperature and the air outlet temperature is larger than a second preset difference value and smaller than or equal to a third preset difference value, controlling the second internal circulation air duct to be communicated with the heat exchange air duct;
under the condition that the first internal circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference value between the target value of the air outlet temperature and the air outlet temperature is smaller than or equal to the second preset difference value, controlling the second internal circulation air duct and the second external circulation air duct to be communicated with the heat exchange air duct;
and under the condition that the first internal circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference value between the target value of the air outlet temperature and the air outlet temperature is greater than the third preset difference value, controlling the second internal circulation air duct and the second external circulation air duct not to be communicated with the heat exchange air duct.
2. The control method according to claim 1, wherein the step of controlling the communication states of the first inner circulation duct and the first outer circulation duct with the heat exchange duct according to the in-vehicle temperature and the in-vehicle temperature target value further comprises:
and if the absolute value of the difference value between the target value of the temperature in the vehicle and the temperature in the vehicle is smaller than the first preset difference value and larger than a fourth preset difference value, controlling the first external circulation air duct to be communicated with the heat exchange air duct.
3. The control method according to claim 2, wherein the step of controlling the communication states of the second internal circulation air duct and the second external circulation air duct with the heat exchange air duct according to the outlet air temperature, the outlet air temperature target value, and the communication states of the first internal circulation air duct and the first external circulation air duct with the heat exchange air duct includes:
and under the condition that the first external circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference value between the target value of the air outlet temperature and the air outlet temperature is greater than a fifth preset difference value and less than or equal to a sixth preset difference value, controlling the second external circulation air duct to be communicated with the heat exchange air duct.
4. The control method according to claim 3, wherein the step of controlling the communication states of the second internal circulation air duct and the second external circulation air duct with the heat exchange air duct according to the outlet air temperature, the outlet air temperature target value, and the communication states of the first internal circulation air duct and the first external circulation air duct with the heat exchange air duct further comprises:
and under the condition that the first external circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference between the target value of the air outlet temperature and the air outlet temperature is less than or equal to the fifth preset difference, controlling the second internal circulation air duct and the second external circulation air duct to be communicated with the heat exchange air duct.
5. The control method according to claim 3, wherein the step of controlling the communication states of the second inner circulation duct and the second outer circulation duct with the heat exchange duct according to the outlet air temperature, the outlet air temperature target value, and the communication states of the first inner circulation duct and the first outer circulation duct with the heat exchange duct further comprises:
and under the condition that the first external circulation air duct is communicated with the heat exchange air duct, if the absolute value of the difference value between the target value of the air outlet temperature and the air outlet temperature is greater than the sixth preset difference value, controlling the second internal circulation air duct and the second external circulation air duct not to be communicated with the heat exchange air duct.
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| CN115195403A (en) * | 2022-08-09 | 2022-10-18 | 浙江极氪智能科技有限公司 | Air conditioning system and automobile |
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| CN104589951A (en) * | 2013-10-31 | 2015-05-06 | 杭州三花研究院有限公司 | Control method and control system for automobile air conditioner circulating air door |
| CN106864203A (en) * | 2017-03-07 | 2017-06-20 | 安徽江淮汽车集团股份有限公司 | A kind of control method for frequency conversion air conditioner and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104589951A (en) * | 2013-10-31 | 2015-05-06 | 杭州三花研究院有限公司 | Control method and control system for automobile air conditioner circulating air door |
| CN106864203A (en) * | 2017-03-07 | 2017-06-20 | 安徽江淮汽车集团股份有限公司 | A kind of control method for frequency conversion air conditioner and system |
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