Control Method, Device, Air Conditioner and Storage Medium of Vehicle-mounted Air Conditioner

Abstract

The present invention discloses a control method, device, air conditioner and storage medium for a vehicle-mounted air conditioner. The method includes: obtaining the return air temperature of the vehicle-mounted air conditioner, the temperature of the driver's cab and the target temperature of the air conditioner; under the current operating mode of the vehicle-mounted air conditioner, based on the target temperature of the air conditioner under the current operating mode, and according to at least one of the return air temperature of the air conditioner under the current operating mode and the temperature of the driver's cab under the current operating mode, controlling the operating frequency of the compressor and the operating gear of the vehicle interior blower. With this solution, by combining the return air temperature of the air conditioner, the temperature of the driver's cab and the target temperature of the air conditioner, the operating frequency of the compressor and the operating gear of the vehicle interior blower are controlled, avoiding frequent start and stop of the compressor, which is beneficial to improving the comfort experience of passengers.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and particularly relates to a control method, device, air conditioner and storage medium for a vehicle-mounted air conditioner, and more particularly to a method, device, air conditioner and storage medium for realizing a dual-temperature control pure electric bus air conditioning system. Background Art

[0002] All pure electric bus air conditioning systems can realize the functions of cooling in summer and heating in winter, and through the algorithm control of vehicle interior and exterior temperature sensors, the variable frequency compressor carried by the air conditioning system can automatically adjust the operating speed according to the load change, so as to achieve the purpose of energy saving.

[0003] However, in the related solutions, the air return temperature acquisition module of the bus air conditioner is arranged at the air return opening on the roof. The response speed of the temperature here to the vehicle interior temperature is faster than that of other positions in the vehicle interior. Especially during the heating operation, the hot air gathers at the top, making the detected air return temperature higher than that of other positions in the vehicle interior, and it cannot well reflect the actual temperature in the vehicle interior, which will cause the compressor to start and stop frequently, affecting the comfort experience of passengers.

[0004] The above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a control method for a vehicle-mounted air conditioner, so as to solve the problem that the vehicle-mounted air conditioner controls the operation of the compressor only according to the temperature at the air return opening on the roof. Since the air return temperature on the roof cannot well reflect the actual temperature in the vehicle interior, it will cause the compressor to start and stop frequently, affecting the comfort experience of passengers. By combining the air return temperature of the air conditioner, the driver's cab temperature and the air conditioner target temperature, the operation frequency of the compressor and the operation gear of the vehicle interior fan are controlled, avoiding frequent start and stop of the compressor, and having the effect of improving the comfort experience of passengers.

[0006] The present invention provides a control method for a vehicle-mounted air conditioner. The vehicle-mounted air conditioner is used for a vehicle, and the vehicle has a driver's cab and a passenger compartment; the passenger compartment has an air return opening; the vehicle-mounted air conditioner also has a compressor and a vehicle interior fan; the control method of the vehicle-mounted air conditioner includes: an acquisition step for acquiring the temperature at the air return opening of the vehicle-mounted air conditioner, denoted as the air return temperature of the air conditioner; acquiring the temperature of the driver's cab of the vehicle-mounted air conditioner, denoted as the driver's cab temperature; and acquiring the set temperature of the vehicle-mounted air conditioner, denoted as the air conditioner target temperature; a control step for, in the current operation mode of the vehicle-mounted air conditioner, based on the air conditioner target temperature in the current operation mode, and according to at least one of the air return temperature of the air conditioner in the current operation mode and the driver's cab temperature in the current operation mode, controlling the operation frequency of the compressor and the operation gear of the vehicle interior fan; wherein, the current operation mode of the vehicle-mounted air conditioner is a cooling mode or a heating mode.

[0007] In some embodiments, in the control step, when the current operating mode of the vehicle-mounted air conditioner is the cooling mode, based on the air conditioner target temperature in the current operating mode and according to at least one of the air conditioner return air temperature and the cab temperature in the current operating mode, the operating frequency of the compressor and the operating gear of the in-vehicle blower are controlled, including at least one of the following: If the air conditioner return air temperature in the current operating mode is greater than the sum of the air conditioner target temperature in the current operating mode and the first preset temperature, control the operating frequency of the compressor to increase at a set frequency increase rate, and control the in-vehicle blower to operate at a set high gear; If the air conditioner return air temperature in the current operating mode is greater than the air conditioner target temperature in the current operating mode and less than or equal to the sum of the air conditioner target temperature in the current operating mode and the first preset temperature, control the frequency increase rate of the operating frequency of the compressor to decrease at the set frequency increase rate, and control the in-vehicle blower to still operate at the high gear.

[0008] In some embodiments, in the control step, when the current operating mode of the vehicle-mounted air conditioner is the cooling mode, based on the air conditioner target temperature in the current operating mode and according to at least one of the air conditioner return air temperature and the cab temperature in the current operating mode, the operating frequency of the compressor and the operating gear of the in-vehicle blower are also controlled, including: If the air conditioner return air temperature in the current operating mode changes to be less than or equal to the air conditioner target temperature in the current operating mode and greater than the difference between the air conditioner target temperature in the current operating mode and the second preset temperature, control the operating frequency of the compressor to decrease, and control the in-vehicle blower to operate at a set medium gear; If the air conditioner return air temperature in the current operating mode changes to be less than or equal to the difference between the air conditioner target temperature in the current operating mode and the second preset temperature, in combination with the cab temperature in the current operating mode, control the operating frequency of the compressor and the operating gear of the in-vehicle blower.

[0009] In some embodiments, in combination with the cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower includes at least one of the following: If the cab temperature in the current operating mode is greater than the sum of the air return temperature of the air conditioner in the current operating mode and the third preset temperature, control the operating frequency of the compressor to stop decreasing, control the compressor to maintain the current operating frequency, and control the in-vehicle blower to still operate at the medium gear; If the cab temperature in the current operating mode is less than or equal to the sum of the air return temperature of the air conditioner in the current operating mode and the third preset temperature, and greater than the air return temperature of the air conditioner in the current operating mode, control the operating frequency of the compressor to continue decreasing until the operating frequency of the compressor decreases to the set minimum operating frequency, then control the compressor to operate at the minimum operating frequency, and control the in-vehicle blower to operate at the set low gear until the cab temperature in the current operating mode is equal to the air return temperature of the air conditioner in the current operating mode, then control the compressor to stop operating; If the cab temperature in the current operating mode is less than or equal to the air return temperature of the air conditioner in the current operating mode, control the compressor to stop operating, and control the vehicle-mounted air conditioner to shut down.

[0010] In some embodiments, in the control step, when the current operating mode of the vehicle-mounted air conditioner is the heating mode, based on the air conditioning target temperature in the current operating mode, and according to at least one of the air return temperature of the air conditioner in the current operating mode and the cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower includes at least one of the following: If the air return temperature of the air conditioner in the current operating mode is less than the difference between the air conditioning target temperature in the current operating mode and the first preset temperature, control the operating frequency of the compressor to increase at a set frequency increase rate, and control the in-vehicle blower to operate at the set high gear; If the air return temperature of the air conditioner in the current operating mode is greater than or equal to the difference between the air conditioning target temperature in the current operating mode and the first preset temperature, and less than the air conditioning target temperature in the current operating mode, control the frequency increase rate of the operating frequency of the compressor to decrease at the set frequency increase rate, and control the in-vehicle blower to still operate at the high gear.

[0011] In some embodiments, in the control step, when the current operating mode of the vehicle-mounted air conditioner is the heating mode, based on the target temperature of the air conditioner in the current operating mode, and according to at least one of the return air temperature of the air conditioner and the cab temperature in the current operating mode, the operating frequency of the compressor and the operating gear of the in-vehicle blower are controlled, and it further includes: if the return air temperature of the air conditioner in the current operating mode changes to be greater than or equal to the target temperature of the air conditioner in the current operating mode and less than the sum of the target temperature of the air conditioner in the current operating mode and the second preset temperature, then control the operating frequency of the compressor to decrease in frequency, and control the in-vehicle blower to operate at a set medium gear; if the return air temperature of the air conditioner in the current operating mode changes to be greater than or equal to the sum of the target temperature of the air conditioner in the current operating mode and the second preset temperature, then in combination with the cab temperature in the current operating mode, control the operating frequency of the compressor and the operating gear of the in-vehicle blower.

[0012] In some embodiments, in combination with the cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower includes at least one of the following: if the cab temperature in the current operating mode is less than the difference between the return air temperature of the air conditioner in the current operating mode and the third preset temperature, then control the operating frequency of the compressor to stop decreasing in frequency, control the compressor to maintain the current operating frequency, and control the in-vehicle blower to still operate at the medium gear; if the cab temperature in the current operating mode is greater than or equal to the difference between the return air temperature of the air conditioner in the current operating mode and the third preset temperature and less than the return air temperature of the air conditioner in the current operating mode, then control the operating frequency of the compressor to continue to decrease in frequency until the operating frequency of the compressor decreases to the set minimum operating frequency, then control the compressor to operate at the minimum operating frequency, and control the in-vehicle blower to operate at the set low gear until the cab temperature in the current operating mode is equal to the return air temperature of the air conditioner in the current operating mode, then control the compressor to stop operating; if the cab temperature in the current operating mode is greater than or equal to the return air temperature of the air conditioner in the current operating mode, then control the compressor to stop operating, and control the vehicle-mounted air conditioner to shut down.

[0013] Matched with the above method, on the other hand, the present invention provides a control device for a vehicle air conditioner, the vehicle air conditioner being used for a vehicle which has a driver's cab and a passenger compartment; the passenger compartment has an air return opening; the vehicle air conditioner further has a compressor and an in-vehicle blower; the control device for the vehicle air conditioner includes an acquisition unit configured to acquire the temperature at the air return opening of the vehicle air conditioner, denoted as the air conditioner return air temperature; acquire the temperature of the driver's cab of the vehicle air conditioner, denoted as the driver's cab temperature; and acquire the set temperature of the vehicle air conditioner, denoted as the air conditioner target temperature; a control unit configured to, in the current operating mode of the vehicle air conditioner, based on the air conditioner target temperature in the current operating mode and according to at least one of the air conditioner return air temperature and the driver's cab temperature in the current operating mode, control the operating frequency of the compressor and the operating gear of the in-vehicle blower; wherein the current operating mode of the vehicle air conditioner is a refrigeration mode or a heating mode.

[0014] In some embodiments, the control unit, when the current operating mode of the vehicle air conditioner is the refrigeration mode, based on the air conditioner target temperature in the current operating mode and according to at least one of the air conditioner return air temperature and the driver's cab temperature in the current operating mode, controls the operating frequency of the compressor and the operating gear of the in-vehicle blower, including at least one of the following: if the air conditioner return air temperature in the current operating mode is greater than the sum of the air conditioner target temperature in the current operating mode and a first preset temperature, then control the operating frequency of the compressor to increase at a set frequency increase rate and control the in-vehicle blower to operate at a set high gear; if the air conditioner return air temperature in the current operating mode is greater than the air conditioner target temperature in the current operating mode and less than or equal to the sum of the air conditioner target temperature in the current operating mode and the first preset temperature, then control the frequency increase rate of the operating frequency of the compressor to decrease at the set frequency increase rate and control the in-vehicle blower to still operate at the high gear.

[0015] In some embodiments, when the current operating mode of the vehicle air conditioner is the cooling mode, the control unit controls the operating frequency of the compressor and the operating gear of the in-vehicle blower based on the target temperature of the air conditioner in the current operating mode and according to at least one of the return air temperature of the air conditioner and the driver's cab temperature in the current operating mode. It further includes: if the return air temperature of the air conditioner in the current operating mode changes to be less than or equal to the target temperature of the air conditioner in the current operating mode and greater than the difference between the target temperature of the air conditioner in the current operating mode and the second preset temperature, then control the operating frequency of the compressor to decrease and control the in-vehicle blower to operate at a set medium gear; if the return air temperature of the air conditioner in the current operating mode changes to be less than or equal to the difference between the target temperature of the air conditioner in the current operating mode and the second preset temperature, then in combination with the driver's cab temperature in the current operating mode, control the operating frequency of the compressor and the operating gear of the in-vehicle blower.

[0016] In some embodiments, the control unit controls the operating frequency of the compressor and the operating gear of the in-vehicle blower in combination with the driver's cab temperature in the current operating mode, including at least one of the following: if the driver's cab temperature in the current operating mode is greater than the sum of the return air temperature of the air conditioner in the current operating mode and the third preset temperature, then control the operating frequency of the compressor to stop decreasing, control the compressor to maintain the current operating frequency, and control the in-vehicle blower to still operate at the medium gear; if the driver's cab temperature in the current operating mode is less than or equal to the sum of the return air temperature of the air conditioner in the current operating mode and the third preset temperature and greater than the return air temperature of the air conditioner in the current operating mode, then control the operating frequency of the compressor to continue decreasing until the operating frequency of the compressor decreases to the set minimum operating frequency, then control the compressor to operate at the minimum operating frequency, and control the in-vehicle blower to operate at the set low gear until the driver's cab temperature in the current operating mode is equal to the return air temperature of the air conditioner in the current operating mode, then control the compressor to stop operating; if the driver's cab temperature in the current operating mode is less than or equal to the return air temperature of the air conditioner in the current operating mode, then control the compressor to stop operating and control the vehicle air conditioner to shut down.

[0017] In some embodiments, when the current operating mode of the vehicle-mounted air conditioner is the heating mode, the control unit controls the operating frequency of the compressor and the operating gear of the in-vehicle blower based on the air-conditioning target temperature in the current operating mode and according to at least one of the air-conditioning return air temperature and the cab temperature in the current operating mode, including at least one of the following: If the air-conditioning return air temperature in the current operating mode is less than the difference between the air-conditioning target temperature in the current operating mode and the first preset temperature, control the operating frequency of the compressor to increase at a set frequency increase rate, and control the in-vehicle blower to operate at a set high gear; If the air-conditioning return air temperature in the current operating mode is greater than or equal to the difference between the air-conditioning target temperature in the current operating mode and the first preset temperature and less than the air-conditioning target temperature in the current operating mode, control the frequency increase rate of the operating frequency of the compressor to decrease at the set frequency increase rate, and control the in-vehicle blower to still operate at the high gear.

[0018] In some embodiments, when the current operating mode of the vehicle-mounted air conditioner is the heating mode, the control unit controls the operating frequency of the compressor and the operating gear of the in-vehicle blower based on the air-conditioning target temperature in the current operating mode and according to at least one of the air-conditioning return air temperature and the cab temperature in the current operating mode, and further includes: If the air-conditioning return air temperature in the current operating mode changes to be greater than or equal to the air-conditioning target temperature in the current operating mode and less than the sum of the air-conditioning target temperature in the current operating mode and the second preset temperature, control the operating frequency of the compressor to decrease, and control the in-vehicle blower to operate at a set medium gear; If the air-conditioning return air temperature in the current operating mode changes to be greater than or equal to the sum of the air-conditioning target temperature in the current operating mode and the second preset temperature, control the operating frequency of the compressor and the operating gear of the in-vehicle blower in combination with the cab temperature in the current operating mode.

[0019] In some embodiments, in combination with the cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower includes at least one of the following: If the cab temperature in the current operating mode is less than the difference between the air return temperature of the air conditioner in the current operating mode and the third preset temperature, then control the operating frequency of the compressor to stop decreasing, control the compressor to maintain the current operating frequency, and control the in-vehicle blower to still operate at the medium gear; If the cab temperature in the current operating mode is greater than or equal to the difference between the air return temperature of the air conditioner in the current operating mode and the third preset temperature, and less than the air return temperature of the air conditioner in the current operating mode, then control the operating frequency of the compressor to continue decreasing until the operating frequency of the compressor decreases to the set minimum operating frequency, then control the compressor to operate at the minimum operating frequency, and control the in-vehicle blower to operate at the set low gear until the cab temperature in the current operating mode is equal to the air return temperature of the air conditioner in the current operating mode, then control the compressor to stop operating; If the cab temperature in the current operating mode is greater than or equal to the air return temperature of the air conditioner in the current operating mode, then control the compressor to stop operating, and control the vehicle-mounted air conditioner to shut down.

[0020] Matched with the above device, on the other hand, the present invention provides an air conditioner, including the control device of the vehicle-mounted air conditioner described above.

[0021] Matched with the above method, on the other hand, the present invention provides a storage medium, the storage medium includes a stored program, wherein, when the program runs, it controls the device where the storage medium is located to execute the control method of the vehicle-mounted air conditioner described above.

[0022] Thus, the solution of the present invention obtains the air return temperature of the air conditioner at the air return opening on the top of the vehicle, obtains the cab temperature at the cab position, and obtains the air conditioner target temperature set by the air conditioner. Through an optimization algorithm, it controls the operating frequency of the compressor of the vehicle-mounted air conditioner and the gear of the in-vehicle blower to achieve energy-saving operation of the air conditioner. In this way, by controlling the operating frequency of the compressor with two temperatures (i.e., the air return temperature of the air conditioner and the cab temperature), it can truly reflect the change of the heating and cooling load in the vehicle, greatly reducing the frequent start and stop of the compressor and improving the comfort experience of passengers. At the same time, it also reduces the risk of damaging the compressor, prolongs the service life of the air conditioner, and also has a good effect on prolonging the service life of the battery of the pure electric bus.

[0023] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention.

[0024] The following will further describe the technical solutions of the present invention in detail through the accompanying drawings and embodiments. Description of the Drawings

[0025] Figure 1 Schematic flowchart of an embodiment of the control method for the vehicle-mounted air conditioner of the present invention;

[0026] Figure 2 Schematic diagram of the position distribution of the temperature acquisition module of the vehicle-mounted air conditioner of the present invention;

[0027] Figure 3 Schematic diagram of the control logic of an embodiment of the vehicle-mounted air conditioner in the cooling mode;

[0028] Figure 4 Schematic diagram of the control logic of an embodiment of the vehicle-mounted air conditioner in the heating mode;

[0029] Figure 5 Schematic diagram of the structure of an embodiment of the control device of the vehicle-mounted air conditioner of the present invention.

[0030] In combination with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0031] 1 - Temperature acquisition module at the air conditioner return air outlet; 2 - Air conditioner manual controller; 3 - Temperature acquisition module in the driver's cab. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in combination with specific embodiments of the present invention and the corresponding accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0033] The air conditioning systems of pure electric buses can all achieve the functions of cooling in summer and heating in winter, and through algorithm control by in-vehicle and out-of-vehicle temperature sensors, the variable-frequency compressors carried by the air conditioning systems can automatically adjust the operating speed according to the load change, so as to achieve the purpose of energy conservation. However, in related solutions, the temperature acquisition module at the return air outlet of the bus air conditioner is set at the return air outlet on the roof. The response speed to the in-vehicle temperature at this place is faster than that at other positions in the vehicle. Especially during heating operation, since the density of hot air is smaller than that of cold air, hot air will rise, and hot air will gather at the top, making the detected return air temperature of the air conditioner higher than that at other positions in the vehicle. And it is difficult for the hot air to be sent downward, resulting in a high temperature at the upper part of the bus and a low temperature at the lower part, and it cannot well reflect the actual in-vehicle temperature. Generally, in the heating mode, when the in-vehicle temperature (i.e., the detected return air temperature) is 3° higher than the air conditioner set temperature, the compressor stops. Therefore, when a single temperature acquisition module is placed on the roof, the return air temperature of the air conditioner is higher than the temperature at other positions in the vehicle, which will cause the compressor to start and stop frequently, thus affecting the operating reliability of the whole machine and causing waste of energy.

[0034] In some solutions, the start and stop of the air-conditioning system compressor are controlled by a temperature acquisition module set at the air outlet in the vehicle. This process requires manual feedback by humans, cannot achieve automatic control, and cannot solve the problem of frequent start and stop of the compressor. There are also some solutions that control the operation of the vehicle engine and the air-conditioning compressor by comparing the real-time detected temperature inside the vehicle with the set temperature. This control method is relatively simple, but still cannot solve the problem of frequent start and stop of the air-conditioning compressor. The frequent start and stop of the compressor will cause large fluctuations in the temperature inside the vehicle, bringing discomfort of sudden cold and heat to passengers, consuming a large amount of electric energy, affecting the service life of the battery of the pure electric bus, and may also damage the compressor itself.

[0035] Therefore, to solve the problem of frequent start and stop of the bus air-conditioning compressor, the solution of the present invention provides a control method for a vehicle-mounted air conditioner. On the basis of setting a return air temperature acquisition module 1 at the return air outlet on the roof of the bus, a driver's cab temperature acquisition module 3 is further set on the air-conditioning display in the driver's cab position. By using a dual temperature acquisition module inside the vehicle to obtain the air-conditioning return air temperature and the driver's cab temperature, and then combining with the air-conditioning target temperature, the operation frequency of the compressor and the operation gear of the in-vehicle blower in the current operation mode of the vehicle-mounted air conditioner are controlled through an optimization algorithm, so that the temperature distribution of the in-vehicle environment is more balanced, the frequent start and stop of the compressor are avoided, the risk of damaging the compressor is reduced, and the service life of the air conditioner and the battery of the pure electric bus are prolonged.

[0036] According to an embodiment of the present invention, there is provided a control method for a vehicle-mounted air conditioner, as Figure 1 shown in the flowchart of an embodiment of the control method of the vehicle-mounted air conditioner of the present invention. The vehicle-mounted air conditioner is used for a vehicle, and the vehicle has a driver's cab and a passenger compartment; the passenger compartment has a return air outlet; the vehicle-mounted air conditioner also has a compressor and an in-vehicle blower. The control method of the vehicle-mounted air conditioner includes: an acquisition step in step S110 and a control step in step S120.

[0037] In step S110, the acquisition step is used to acquire the temperature at the return air outlet of the vehicle-mounted air conditioner, denoted as the air-conditioning return air temperature; acquire the temperature of the driver's cab of the vehicle-mounted air conditioner, denoted as the driver's cab temperature; and acquire the set temperature of the vehicle-mounted air conditioner, denoted as the air-conditioning target temperature.

[0038] In step S120, the control step is used to control the operation frequency of the compressor and the operation gear of the in-vehicle blower based on the air-conditioning target temperature in the current operation mode and according to at least one of the air-conditioning return air temperature and the driver's cab temperature in the current operation mode in the current operation mode of the vehicle-mounted air conditioner; wherein, the current operation mode of the vehicle-mounted air conditioner is a refrigeration mode or a heating mode.

[0039] Thus, by obtaining the air return temperature of the on-vehicle air conditioner on the roof, the cab temperature, and the air conditioner target temperature, and based on the air conditioner target temperature in the current operating mode, and according to at least one of the air return temperature in the current operating mode and the cab temperature in the current operating mode, the operating frequency of the compressor and the operating gear of the in-vehicle blower are controlled, so that the temperature distribution of the in-vehicle environment is more balanced, avoiding large fluctuations in the in-vehicle temperature caused by frequent start and stop of the compressor, which brings discomfort of sudden cold and heat to passengers, and improving the comfort experience of passengers.

[0040] For a better explanation of the specific implementation process of the solution of the present invention, the following is combined with Figures 1 to 4 For exemplary illustration, let the air return temperature obtained by the air return temperature acquisition module 1 of the air conditioner be Ta, the air conditioner target temperature (the initial set temperature of the air conditioner hand controller 2) be Ts, the cab temperature obtained by the cab temperature acquisition module 3 be Tsj, the first preset temperature be A, the second preset temperature be B, and the third preset temperature be C, and A, B, and C are all positive values.

[0041] In some embodiments, when the current operating mode of the on-vehicle air conditioner is the cooling mode, the air return temperature acquisition module 1 arranged at the air return opening of the air conditioner sends the detected air return temperature Ta to the main controller of the air conditioner. The main controller judges and compares this temperature with the air conditioner target temperature Ts set by the driver through the air conditioner hand controller 2. If the air return temperature Ta > the air conditioner target temperature Ts + the first preset value A (the magnitude of different first preset temperatures A will affect the in-vehicle temperature fluctuation range, and the temperature range of the A value can be 2-3°, preferably the temperature of A is 2°), the main controller sends a frequency increase signal to the compressor drive controller to drive the compressor to increase the frequency of operation. At this time, the compressor increases the operating frequency at a certain speed. If the speed increases too fast, it will affect the service life of the compressor. Preferably, the operating frequency is increased at a frequency increase speed of 1 hz / s, so that the evaporation temperature of the air conditioner drops rapidly. At the same time, the in-vehicle blower operates at a high gear, and the air volume increases. When the high-temperature air in the vehicle passes through the evaporator through the circulation blower, its temperature can be quickly reduced and sent back into the vehicle, so that the in-vehicle temperature can be quickly reduced to achieve the purpose of rapid cooling.

[0042] After the operating frequency of the compressor increases at the set frequency increase rate for the set time, the in-vehicle temperature gradually decreases. If it is detected that Ta > Ts and Ta ≤ Ts + A, the air conditioner compressor continues to increase the frequency, but the frequency increase rate will start to decrease. Preferably, the frequency increase rate is adjusted from increasing 1 hz per second to increasing 1 hz every 3 seconds. The decrease in the in-vehicle temperature will make the evaporation temperature lower, and the power consumption of the compressor becomes higher. In order to keep the in-vehicle temperature within a relatively comfortable range, by restricting the frequency increase speed of the compressor, the energy consumption of the air conditioner can be reduced to a certain extent. At this time, the in-vehicle blower still operates at a high gear.

[0043] Furthermore, after the rising frequency rate of controlling the operating frequency of the compressor to increase at a set rising frequency rate decreases, and controlling the in-vehicle blower to still operate at the high wind speed setting, the in-vehicle temperature further decreases. If it is detected that Ta > Ts - B and Ta ≤ T (the magnitude of different second preset temperatures B will affect the in-vehicle temperature fluctuation range, and the temperature range of the B value can be 1 - 2 °C, preferably the temperature of B is 1 °C), the air-conditioning compressor starts to decrease the operating frequency. Preferably, the compressor frequency decreases at a rate of 1 Hz per second, slowing down the rate of decrease of the in-vehicle temperature, further reducing the compressor energy consumption. At the same time, the in-vehicle blower operates at the medium wind speed setting, with the air volume decreasing, so that the in-vehicle temperature (the return air temperature Ta detected by the air-conditioning return air duct temperature acquisition module 1) and the air-conditioning target temperature (the initial set temperature of the air-conditioning hand controller 2) are maintained within the tolerance range, and the compressor will not stop due to the in-vehicle temperature decreasing too fast. The wind speed of the in-vehicle blower at the medium wind speed setting is lower than that at the high wind speed setting.

[0044] After controlling the operating frequency of the compressor to decrease and controlling the in-vehicle blower to operate at the set medium wind speed setting, if the in-vehicle temperature drops to the lowest point Ts - B, that is, Ta ≤ Ts - B is satisfied, at this time, the main control controller will synchronously obtain the driver's cab temperature Tsj detected by the driver's cab temperature module 3 near the air-conditioning hand controller 2 in the driver's cab, and jointly control the operating frequency of the compressor and the operating wind speed setting of the in-vehicle blower.

[0045] Furthermore, after controlling the operating frequency of the compressor to decrease and controlling the in-vehicle blower to operate at the set medium wind speed setting, if it is obtained that Ta ≤ Ts - B, at this time, the main control controller will synchronously obtain the driver's cab temperature Tsj detected by the driver's cab temperature module 3 near the air-conditioning hand controller 2 in the driver's cab, and compare this value with the air-conditioning return air temperature Ta detected by the air-conditioning return air duct temperature acquisition module 1. When the condition Tsj > Ta + C (the magnitude of different third preset temperatures C will affect the in-vehicle temperature fluctuation range, and the temperature range of the C value can be 1 - 2 °C, preferably the temperature of C is 1 °C) holds, the main control controller sends a signal to stop decreasing the frequency to the compressor drive controller, and the compressor will maintain the current operating frequency, and the in-vehicle blower keeps operating at the medium wind speed setting; after controlling the operating frequency of the compressor to decrease and controlling the in-vehicle blower to operate at the set medium wind speed setting, if Tsj ≤ Ta + C and Tsj > Ta holds, the compressor continues to decrease the operating frequency. At this time, the compressor continuously decreases at a rate of 1 Hz per second. When it reaches the lowest operable frequency, it will maintain the lowest frequency and continue to operate. The in-vehicle circulation blower then operates at the low wind speed setting until Tsj < Ta, when the driver's seat temperature is equal to the air-conditioning return air temperature, the compressor stops operating.

[0046] In some embodiments, when the current operating mode of the vehicle air conditioner is the heating mode, the air conditioner return air temperature acquisition module 1 disposed at the air conditioner return air outlet sends the detected air conditioner return air temperature Ta to the air conditioner main controller. The main controller judges and compares this temperature with the air conditioner target temperature Ts set by the driver through the air conditioner manual controller 2. If Ta < Ts - A (the magnitude of different first preset temperatures A will affect the range of vehicle interior temperature fluctuations, and the temperature range of the A value can be 2 - 3 °C, preferably the temperature of A is 2 °C), the main controller sends a frequency increase signal to the compressor drive controller to drive the compressor to increase its frequency of operation. At this time, the compressor increases its operating frequency at a certain speed. If the speed increases too fast, it will affect the service life of the compressor. Preferably, the operating frequency is increased at a frequency increase speed of 1 Hz / s. At the same time, the vehicle interior blower operates at a high speed gear, the air volume increases, and the vehicle interior temperature rises rapidly to achieve the purpose of rapid heating.

[0047] After the operating frequency of the compressor increases at the set frequency increase rate for the set time, the vehicle interior temperature gradually rises. If it is detected that Ta < Ts and Ta ≥ Ts - A, the air conditioner compressor continues to increase its frequency, but the frequency increase rate will start to decrease. Preferably, the frequency increase rate is adjusted from increasing 1 Hz per second to increasing 1 Hz every 3 seconds. In order to keep the vehicle interior temperature within a relatively comfortable range and reduce the energy consumption of the air conditioner to a certain extent, the frequency increase speed of the compressor is restricted at this time, and the vehicle interior blower still operates at a high speed gear.

[0048] Further, after the frequency increase rate of controlling the operating frequency of the compressor to increase at the set frequency increase rate decreases, and controlling the vehicle interior blower to still operate at the high speed gear, the vehicle interior temperature further rises. If it is detected that Ta < Ts + B and Ta ≥ Ts (the magnitude of different second preset temperatures B will affect the range of vehicle interior temperature fluctuations, and the temperature range of the B value can be 1 - 2 °C, preferably the temperature of B is 1 °C), the air conditioner compressor starts to decrease its operating frequency. Preferably, the compressor frequency decreases at a speed of decreasing 1 Hz per second, so that the rising speed of the vehicle interior temperature slows down, the compressor energy consumption further decreases, and at the same time, the vehicle interior blower operates at a medium speed gear, and the air volume decreases, so that the vehicle interior temperature (the return air temperature Ta detected by the air conditioner return air temperature acquisition module 1) and the air conditioner target temperature (the initial set temperature of the air conditioner manual controller 2) are maintained within the tolerance range, and it will not cause the compressor to stop due to the too fast rising speed of the vehicle interior temperature. The wind speed of the vehicle interior blower at the medium speed gear is lower than the wind speed of the vehicle interior blower at the high speed gear.

[0049] After the operating frequency of the compressor is controlled to decrease in frequency and the in-vehicle blower is controlled to operate at a set medium speed gear, if the in-vehicle temperature rises to the highest point Ts + B, that is, Ta ≥ Ts + B, at this time the main control controller will synchronously obtain the temperature Tsj detected by the driver's cab temperature module 3 near the driver's cab air conditioner hand controller 2, and jointly control the operating frequency of the compressor and the operating gear of the in-vehicle blower.

[0050] Further, after the operating frequency of the compressor is controlled to decrease in frequency and the in-vehicle blower is controlled to operate at a set medium speed gear, if it is obtained that Ta ≥ Ts + B, at this time the main control controller will synchronously obtain the temperature Tsj detected by the driver's cab temperature module 3 near the driver's cab air conditioner hand controller 2, and compare this value with the air conditioner return air temperature Ta detected by the air conditioner return air temperature acquisition module 1. When the condition Tsj < Ta - C is established, the main control controller sends a signal to stop decreasing the frequency to the compressor drive controller, and the compressor will maintain the current operating frequency, and the in-vehicle blower will keep running at the medium speed gear; after the operating frequency of the compressor is controlled to decrease in frequency and the in-vehicle blower is controlled to operate at a set medium speed gear, if Tsj ≥ Ta - C and Tsj < Ta are established, the compressor continues to decrease the operating frequency. At this time, the compressor continuously decreases at a speed of 1 Hz per second. When the lowest operable frequency is reached, it will maintain the lowest frequency and continue to operate, and the in-vehicle circulation blower will operate at the low speed gear until Tsj ≥ Ta, that is, when the driver's position temperature is equal to the air conditioner return air temperature, the compressor stops running. The wind speed of the in-vehicle blower at the low speed gear is lower than the wind speed of the in-vehicle blower at the medium speed gear.

[0051] By adopting the technical solution of the present invention, by obtaining the air conditioner return air temperature, the driver's cab temperature and the air conditioner target temperature, and controlling the on-vehicle air conditioner in the current operating mode according to the air conditioner return air temperature, the driver's cab temperature and the air conditioner target temperature in the current operating mode, the operating frequency of the compressor and the operating gear of the in-vehicle blower can be controlled more reasonably, reducing the risk of damage to the air conditioner compressor due to frequent start and stop, and ensuring the reliability of the whole machine operation.

[0052] According to an embodiment of the present invention, there is also provided a control device for an on-vehicle air conditioner corresponding to the control method of the on-vehicle air conditioner. The on-vehicle air conditioner is used for a vehicle, and the vehicle has a driver's cab and a passenger compartment; the passenger compartment has a return air outlet; the on-vehicle air conditioner also has a compressor and an in-vehicle blower. Figure 5 It is a schematic structural diagram of an embodiment of the control device for the on-vehicle air conditioner of the present invention. As Figure 5 shown, the control device for the on-vehicle air conditioner includes: an acquisition unit 102 and a control unit 104.

[0053] Among them, the acquisition unit 102 is configured to acquire the temperature at the air return opening of the vehicle-mounted air conditioner, denoted as the air conditioner return air temperature; acquire the temperature of the driver's cab of the vehicle-mounted air conditioner, denoted as the driver's cab temperature; and acquire the set temperature of the vehicle-mounted air conditioner, denoted as the air conditioner target temperature.

[0054] The control unit 104 is configured to control the operating frequency of the compressor and the operating gear of the in-vehicle blower based on the air conditioner target temperature in the current operating mode of the vehicle-mounted air conditioner and according to at least one of the air conditioner return air temperature and the driver's cab temperature in the current operating mode; wherein, the current operating mode of the vehicle-mounted air conditioner is a refrigeration mode or a heating mode.

[0055] Thus, by acquiring the air conditioner return air temperature, the driver's cab temperature, and the air conditioner target temperature on the roof of the vehicle-mounted air conditioner, based on the air conditioner target temperature in the current operating mode, and according to at least one of the air conditioner return air temperature and the driver's cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower, the temperature distribution in the vehicle interior environment is made more balanced, avoiding large fluctuations in the vehicle interior temperature caused by frequent start and stop of the compressor, which brings discomfort of sudden cold and heat to passengers, and improving the comfort experience of passengers.

[0056] Specifically, Figure 2 It is a schematic diagram of the position distribution of the temperature acquisition module of the vehicle-mounted air conditioner. The temperature acquisition module can be a temperature sensor. As Figure 2 shown, an air conditioner return air opening is provided at the top position of the passenger compartment of the bus. An air conditioner return air temperature acquisition module 1 is provided at the air conditioner return air opening to acquire the temperature at the air return opening of the vehicle-mounted air conditioner, denoted as the air conditioner return air temperature. However, since the density of hot air is smaller than that of cold air, hot air rises and cold air descends, and the upper part of the bus will have a higher temperature and the lower part will have a lower temperature. In the refrigeration mode, the air conditioner return air temperature reacts slower, and the collected temperature is higher than the temperature inside the bus, which will cause the compressor to continuously operate at a high frequency, the temperature inside the vehicle to be too low, causing discomfort to passengers, and wasting electric energy; in the heating mode, the air conditioner return air temperature reacts faster, and the detected return air temperature is higher than other positions inside the vehicle. When the temperature inside the vehicle (i.e., the detected return air temperature) is 3° higher than the air conditioner set temperature, the compressor stops. After the compressor stops, the temperature inside the vehicle drops rapidly, and the compressor starts again. After starting, the return air temperature rises rapidly, and the temperature of the lower part of the bus rises slowly, which will cause the compressor to stop and start again, thus affecting the reliability of the whole machine operation.

[0057] Therefore, in order to better reflect the actual temperature inside the passenger car, the acquisition unit 102, in addition to acquiring the temperature at the air return opening of the vehicle-mounted air conditioner collected by the air return opening temperature acquisition module 1 of the air conditioner, that is, the air return temperature of the air conditioner, also acquires the driver's cab temperature collected by the driver's cab temperature acquisition module 3. The driver's seat in the driver's cab is generally far from the air outlet of the vehicle-mounted air conditioner. The air flow organization at this position is more uniform, and it can better reflect the actual temperature situation inside the vehicle. Therefore, as Figure 2 shown, an air conditioner manual controller 2 and a driver's cab temperature acquisition module 3 are provided in the driver's cab. The air conditioner manual controller 2 is used to manually set the temperature of the vehicle-mounted air conditioner. The set temperature of the vehicle-mounted air conditioner obtained is recorded as the air conditioner target temperature. The driver's cab temperature acquisition module 3 can be set at the driver's seat and is used to acquire the temperature of the driver's cab of the vehicle-mounted air conditioner, which is recorded as the driver's cab temperature.

[0058] The control unit 104 is configured to substitute the three acquired temperature values into an optimization algorithm to jointly control the operating frequency of the compressor of the vehicle-mounted air conditioner and the operating gear of the in-vehicle blower. The current operating mode of the vehicle-mounted air conditioner has two types: a refrigeration mode or a heating mode. Different algorithm logics are adopted under different operating modes.

[0059] It should be noted that the compressor, in-vehicle blower and other components included in the vehicle-mounted air conditioner of the present invention, as well as the connection relationship and working principle between each component, are all basic components of the vehicle-mounted air conditioner. Therefore, no further description will be made here.

[0060] In the control of the control unit 104, as Figure 3 and Figure 4 shown, let the air return temperature of the air conditioner acquired by the air return opening temperature acquisition module 1 of the air conditioner be Ta, the air conditioner target temperature (the initial set temperature of the air conditioner manual controller 2) be Ts, the driver's cab temperature acquired by the driver's cab temperature acquisition module 3 be Tsj, the first preset temperature be A, the second preset temperature be B, and the third preset temperature be C, and A, B, and C are all positive values.

[0061] In some embodiments, the control unit 104 is further specifically configured that when the current operating mode of the vehicle air conditioner is the cooling mode, the air conditioner return air temperature acquisition module 1 disposed at the air conditioner return air outlet sends the detected air conditioner return air temperature Ta to the main air conditioner controller, and the main controller determines and compares this temperature with the air conditioner target temperature Ts set by the driver through the air conditioner manual controller 2. If Ta > Ts + A (the magnitude of different first preset temperatures A will affect the temperature fluctuation range inside the vehicle, and the temperature range of the A value can be 2 - 3 °C, preferably the temperature of A is 2 °C), the main controller sends a frequency increase signal to the compressor drive controller to drive the compressor to increase its frequency of operation. At this time, the compressor increases its operating frequency at a certain speed. If the speed increases too fast, it will affect the service life of the compressor. Preferably, the operating frequency is increased at a frequency increase speed of 1 Hz / s, so that the evaporation temperature of the air conditioner drops rapidly. At the same time, the in-vehicle fan operates at a high gear, and the air volume increases. When the high-temperature air inside the vehicle passes through the evaporator via the circulation fan, its temperature can be rapidly reduced and then sent back into the vehicle, so that the temperature inside the vehicle drops rapidly, achieving the purpose of rapid cooling.

[0062] The control unit 104 is further specifically configured that after the operating frequency of the compressor increases at the set frequency increase rate for the set time, the temperature inside the vehicle gradually decreases. If it is detected that Ta > Ts and Ta ≤ Ts + A, the air conditioner compressor continues to increase its frequency, but the frequency increase rate will start to decrease. Preferably, the frequency increase rate is adjusted from increasing 1 Hz per second to increasing 1 Hz every 3 seconds. The decrease in the temperature inside the vehicle will make the evaporation temperature lower, and the power consumption of the compressor will also become higher. In order to keep the temperature inside the vehicle within a relatively comfortable range, by restricting the frequency increase speed of the compressor, the energy consumption of the air conditioner can be reduced to a certain extent. At this time, the in-vehicle fan still operates at a high gear.

[0063] Further, the control unit 104 is further specifically configured that after the frequency increase rate of controlling the operating frequency of the compressor to increase at the set frequency increase rate decreases, and controlling the in-vehicle fan to still operate at the high gear, the temperature inside the vehicle further decreases. If it is detected that Ta > Ts - B and Ta ≤ T (the magnitude of different second preset temperatures B will affect the temperature fluctuation range inside the vehicle, and the temperature range of the B value can be 1 - 2 °C, preferably the temperature of B is 1 °C), the air conditioner compressor starts to decrease its operating frequency. Preferably, the compressor frequency decreases at a speed of decreasing 1 Hz per second, so that the temperature decrease speed inside the vehicle slows down, and the compressor energy consumption further decreases. At the same time, the in-vehicle fan operates at a medium gear, and the air volume decreases, so that the temperature inside the vehicle (the return air temperature Ta detected by the air conditioner return air temperature acquisition module 1) and the air conditioner target temperature (the initial set temperature of the air conditioner manual controller 2) are maintained within the tolerance range, and the compressor will not stop due to the too fast temperature decrease speed inside the vehicle. The wind speed of the in-vehicle fan at the medium gear is lower than the wind speed of the in-vehicle fan at the high gear.

[0064] The control unit 104 is specifically further configured to, after reducing the operating frequency of the compressor and controlling the in-vehicle blower to operate at a set medium speed gear, if the in-vehicle temperature drops to the lowest point Ts - B, that is, Ta ≤ Ts - B is satisfied, at this time, the main control controller will synchronously obtain the driver's cab temperature Tsj detected by the driver's cab temperature module 3 near the driver's cab air conditioner manual controller 2, and jointly control the operating frequency of the compressor and the operating gear of the in-vehicle blower.

[0065] Further, the control unit 104 is specifically further configured to, after reducing the operating frequency of the compressor and controlling the in-vehicle blower to operate at a set medium speed gear, if Ta ≤ Ts - B is obtained, at this time, the main control controller will synchronously obtain the driver's cab temperature Tsj detected by the driver's cab temperature module 3 near the driver's cab air conditioner manual controller 2, and compare this value with the air conditioner return air temperature Ta detected by the air conditioner return air temperature acquisition module 1. When the condition Tsj > Ta + C (the magnitude of different third preset temperatures C will affect the in-vehicle temperature fluctuation range, and the temperature range of C value can be 1 - 2 °C, preferably C is 1 °C) holds, the main control controller sends a signal to stop frequency reduction to the compressor drive controller, and the compressor will maintain the current operating frequency, and the in-vehicle blower will keep running at the medium speed gear; after reducing the operating frequency of the compressor and controlling the in-vehicle blower to operate at a set medium speed gear, if Tsj ≤ Ta + C and Tsj > Ta hold, the compressor continues to reduce the operating frequency. At this time, the compressor continuously reduces at a speed of 1 hz per second. When it reaches the lowest operable frequency, it will maintain the lowest frequency and continue to operate, and the in-vehicle circulation blower will operate at a low speed gear until Tsj < Ta, that is, when the driver's position temperature is equal to the air conditioner return air temperature, the compressor stops running.

[0066] In some embodiments, the control unit 104 is specifically further configured to, when the current operating mode of the vehicle-mounted air conditioner is the heating mode, the air conditioner return air temperature acquisition module 1 provided at the air conditioner return air outlet sends the detected air conditioner return air temperature Ta to the air conditioner main control controller, and the main control controller judges and compares this temperature with the air conditioner target temperature Ts set by the driver through the air conditioner manual controller 2. If Ta < Ts - A (the magnitude of different first preset temperatures A will affect the in-vehicle temperature fluctuation range, and the temperature range of A value can be 2 - 3 °C, preferably A is 2 °C), the main control controller sends a frequency increase signal to the compressor drive controller to drive the compressor to increase the frequency and operate. At this time, the compressor increases the operating frequency at a certain speed. If the speed increases too fast, it will affect the service life of the compressor. Preferably, the operating frequency is increased at a speed of 1 hz / s, and at the same time, the in-vehicle blower operates at a high speed gear, the air volume increases, and the in-vehicle temperature rises rapidly to achieve the purpose of rapid heating.

[0067] The control unit 104 is further configured such that after the operating frequency of the compressor increases at a set frequency increase rate for a set time, when the temperature inside the vehicle gradually rises and it is detected that Ta < Ts and Ta ≥ Ts - A, the air-conditioning compressor continues to increase its frequency, but the frequency increase rate will start to decrease. Preferably, the frequency increase rate is adjusted from increasing 1 Hz per second to increasing 1 Hz every 3 seconds. In order to keep the temperature inside the vehicle within a relatively comfortable range and to reduce the energy consumption of the air conditioner to a certain extent, the frequency increase speed of the compressor is restricted at this time, and the blower inside the vehicle still operates at the high gear.

[0068] Furthermore, the control unit 104 is further configured such that after the frequency increase rate of controlling the operating frequency of the compressor to increase at a set frequency increase rate decreases, and controlling the blower inside the vehicle to still operate at the high gear, when the temperature inside the vehicle further rises and it is detected that Ta < Ts + B and Ta ≥ Ts (the magnitude of different second preset temperatures B will affect the temperature fluctuation range inside the vehicle, and the temperature range of the B value can be 1 - 2 °C, preferably the temperature of B is 1 °C), the air-conditioning compressor starts to decrease its operating frequency. Preferably, the compressor frequency decreases at a speed of decreasing 1 Hz per second, so that the rising speed of the temperature inside the vehicle slows down, the energy consumption of the compressor further decreases, and at the same time, the blower inside the vehicle operates at the medium gear and the air volume decreases, so that the temperature inside the vehicle (the return air temperature Ta detected by the air-conditioning return air temperature acquisition module 1) and the air-conditioning target temperature (the initial set temperature of the air-conditioning hand controller 2) are maintained within the tolerance range, and it is not so that the rising speed of the temperature inside the vehicle is too fast and causes the compressor to shut down. The wind speed of the blower inside the vehicle at the medium gear is lower than the wind speed of the blower inside the vehicle at the high gear.

[0069] The control unit 104 is further configured such that after controlling the operating frequency of the compressor to decrease and controlling the blower inside the vehicle to operate at the set medium gear, if the temperature inside the vehicle rises to the highest point Ts + B, that is, when Ta ≥ Ts + B is satisfied, at this time, the main control controller will synchronously obtain the temperature Tsj detected by the driver's cab temperature module 3 near the air-conditioning hand controller 2 in the driver's cab, and jointly control the operating frequency of the compressor and the operating gear of the blower inside the vehicle.

[0070] Further, the control unit 104 is specifically further configured to, after controlling the operating frequency of the compressor to decrease and controlling the in-vehicle blower to operate at a set medium speed gear, if it is obtained that Ta≥Ts+B, at this time, the main control controller will synchronously obtain the temperature Tsj detected by the driver's cab temperature module 3 near the driver's cab air conditioner hand controller 2, and compare this value with the air conditioner return air temperature Ta detected by the air conditioner return air temperature acquisition module 1. When the condition Tsj<Ta-C is satisfied, the main control controller sends a signal to stop frequency reduction to the compressor drive controller, and the compressor will maintain the current operating frequency, and the in-vehicle blower will keep running at the medium speed gear; after controlling the operating frequency of the compressor to decrease and controlling the in-vehicle blower to operate at a set medium speed gear, if Tsj≥Ta-C and Tsj<Ta are satisfied, the compressor continues to reduce the operating frequency. At this time, the compressor continuously reduces at a speed of 1 Hz per second. When the lowest operable frequency is reached, it will maintain the lowest frequency and continue to operate, and the in-vehicle circulation blower will operate at the low speed gear until Tsj≥Ta, that is, when the driver's cab temperature is equal to the air conditioner return air temperature, the compressor stops operating. The wind speed of the in-vehicle blower at the low speed gear is lower than the wind speed of the in-vehicle blower at the medium speed gear.

[0071] Since the processing and functions implemented by the device in this embodiment are basically corresponding to the embodiments, principles, and examples of the foregoing method, for the parts not described in detail in the description of this embodiment, reference may be made to the relevant descriptions in the foregoing embodiments, and details will not be repeated here.

[0072] By adopting the technical solution of the present invention, by obtaining the air conditioner return air temperature, the driver's cab temperature, and the air conditioner target temperature, and controlling the on-vehicle air conditioner in the current operating mode, according to the air conditioner return air temperature in the current operating mode, the driver's cab temperature in the current operating mode, and the air conditioner target temperature in the current operating mode, the operating frequency of the compressor and the operating gear of the in-vehicle blower are reasonably adjusted, so that the temperature distribution in the vehicle interior environment is more balanced, the start-stop frequency of the compressor is optimized, more energy is saved, and at the same time, it also has a good effect on extending the service life of the battery of the pure electric bus.

[0073] According to an embodiment of the present invention, there is also provided an air conditioner corresponding to the control device of the on-vehicle air conditioner. The air conditioner may include the control device of the on-vehicle air conditioner described above.

[0074] Since the processing and functions implemented by the air conditioner in this embodiment are basically corresponding to the embodiments, principles, and examples of the foregoing device, for the parts not described in detail in the description of this embodiment, reference may be made to the relevant descriptions in the foregoing embodiments, and details will not be repeated here.

[0075] Adopting the technical solution of the present invention, by obtaining the air return temperature of the air conditioner, the cab temperature, and the target temperature of the air conditioner, and controlling the on-vehicle air conditioner in the current operating mode, according to the air return temperature of the air conditioner in the current operating mode, the cab temperature in the current operating mode, and the target temperature of the air conditioner in the current operating mode, reasonably adjusting the operating frequency of the compressor and the operating gear of the in-vehicle blower, truly reflecting the change of the cooling and heating load in the vehicle, reducing the risk of damage to the compressor caused by frequent start and stop of the compressor, and prolonging the service life of the air conditioner.

[0076] According to an embodiment of the present invention, there is also provided a storage medium corresponding to the control method of the on-vehicle air conditioner. The storage medium includes a stored program, wherein when the program runs, it controls the device where the storage medium is located to execute the above-mentioned control method of the on-vehicle air conditioner.

[0077] Since the processing and functions implemented by the storage medium of this embodiment are basically corresponding to the embodiments, principles, and examples of the foregoing method, for the details not described in the description of this embodiment, reference can be made to the relevant descriptions in the foregoing embodiments, and details will not be repeated here.

[0078] Adopting the technical solution of the present invention, by obtaining the air return temperature of the air conditioner, the cab temperature, and the target temperature of the air conditioner, and controlling the on-vehicle air conditioner in the current operating mode, according to the air return temperature of the air conditioner in the current operating mode, the cab temperature in the current operating mode, and the target temperature of the air conditioner in the current operating mode, controlling the operating frequency of the air conditioner compressor and the gear of the in-vehicle blower to achieve energy-saving operation and improve the comfort experience of passengers.

[0079] In summary, it is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0080] The above are only embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A control method for a vehicle air conditioner, characterized in that, The vehicle-mounted air conditioner is used for a vehicle, which has a driver's cab and a passenger compartment; the passenger compartment has an air return opening; the vehicle-mounted air conditioner also has a compressor and an in-vehicle blower; The control method of the vehicle-mounted air conditioner includes: An acquisition step for acquiring the temperature at the air return opening of the vehicle-mounted air conditioner, denoted as the air conditioner return air temperature; acquiring the temperature of the driver's cab of the vehicle-mounted air conditioner, denoted as the driver's cab temperature; and acquiring the set temperature of the vehicle-mounted air conditioner, denoted as the air conditioner target temperature; the driver's cab temperature is used to reflect the actual temperature inside the vehicle; A control step for controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower based on the air conditioner target temperature in the current operating mode and according to at least one of the air conditioner return air temperature and the driver's cab temperature in the current operating mode under the current operating mode of the vehicle-mounted air conditioner; wherein, the current operating mode of the vehicle-mounted air conditioner is a refrigeration mode or a heating mode; In the refrigeration mode, if the air conditioner return air temperature in the current operating mode changes to be less than or equal to the difference between the air conditioner target temperature in the current operating mode and the second preset temperature, then in combination with the driver's cab temperature in the current operating mode, control the operating frequency of the compressor and the operating gear of the in-vehicle blower; In the heating mode, if the air conditioner return air temperature in the current operating mode changes to be greater than or equal to the sum of the air conditioner target temperature in the current operating mode and the second preset temperature, then in combination with the driver's cab temperature in the current operating mode, control the operating frequency of the compressor and the operating gear of the in-vehicle blower.

2. The control method of the vehicle-mounted air conditioner according to claim 1, wherein In the control step, when the current operating mode of the vehicle-mounted air conditioner is the refrigeration mode, based on the air conditioner target temperature in the current operating mode and according to at least one of the air conditioner return air temperature and the driver's cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower includes at least one of the following: If the air conditioner return air temperature in the current operating mode is greater than the sum of the air conditioner target temperature in the current operating mode and the first preset temperature, then control the operating frequency of the compressor to increase at a set frequency increase rate and control the in-vehicle blower to operate at a set high gear; If the air conditioner return air temperature in the current operating mode is greater than the air conditioner target temperature in the current operating mode and less than or equal to the sum of the air conditioner target temperature in the current operating mode and the first preset temperature, then control the operating frequency of the compressor to increase at a decreasing frequency increase rate and control the in-vehicle blower to still operate at the high gear.

3. The control method of the vehicle-mounted air conditioner according to claim 2, wherein, In the control step, when the current operating mode of the vehicle-mounted air conditioner is the refrigeration mode, based on the air conditioner target temperature in the current operating mode and according to at least one of the air conditioner return air temperature and the driver's cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower further includes: If the return air temperature of the air conditioner in the current operating mode changes to be less than or equal to the target temperature of the air conditioner in the current operating mode and greater than the difference between the target temperature of the air conditioner in the current operating mode and the second preset temperature, control the operating frequency of the compressor to decrease in frequency, and control the in-vehicle blower to operate at a set medium speed.

4. The control method of the vehicle-mounted air conditioner according to claim 3, wherein Combined with the cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower includes at least one of the following: If the cab temperature in the current operating mode is greater than the sum of the return air temperature of the air conditioner in the current operating mode and the third preset temperature, control the operating frequency of the compressor to stop decreasing in frequency, control the compressor to maintain the current operating frequency, and control the in-vehicle blower to still operate at the medium speed. If the cab temperature in the current operating mode is less than or equal to the sum of the return air temperature of the air conditioner in the current operating mode and the third preset temperature and greater than the return air temperature of the air conditioner in the current operating mode, control the operating frequency of the compressor to continue decreasing in frequency until the operating frequency of the compressor decreases to the set minimum operating frequency, then control the compressor to operate at the minimum operating frequency, and control the in-vehicle blower to operate at the set low speed until the cab temperature in the current operating mode is equal to the return air temperature of the air conditioner in the current operating mode, then control the compressor to stop operating. If the cab temperature in the current operating mode is less than or equal to the return air temperature of the air conditioner in the current operating mode, control the compressor to stop operating and control the vehicle-mounted air conditioner to shut down.

5. The control method of the vehicle-mounted air conditioner according to any one of claims 1 to 4, characterized in that In the control step, when the current operating mode of the vehicle-mounted air conditioner is the heating mode, based on the target temperature of the air conditioner in the current operating mode and according to at least one of the return air temperature of the air conditioner in the current operating mode and the cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower includes at least one of the following: If the return air temperature of the air conditioner in the current operating mode is less than the difference between the target temperature of the air conditioner in the current operating mode and the first preset temperature, control the operating frequency of the compressor to increase in frequency at a set frequency increase rate, and control the in-vehicle blower to operate at a set high speed. If the return air temperature of the air conditioner in the current operating mode is greater than or equal to the difference between the target temperature of the air conditioner in the current operating mode and the first preset temperature and less than the target temperature of the air conditioner in the current operating mode, control the increase rate of the operating frequency of the compressor to decrease at the set frequency increase rate, and control the in-vehicle blower to still operate at the high speed.

6. The control method of the vehicle-mounted air conditioner according to claim 5, characterized in that, In the control step, when the current operating mode of the vehicle-mounted air conditioner is the heating mode, based on the target temperature of the air conditioner in the current operating mode and according to at least one of the return air temperature of the air conditioner in the current operating mode and the cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower further includes: If the return air temperature of the air conditioner in the current operating mode changes to be greater than or equal to the target temperature of the air conditioner in the current operating mode and less than the sum of the target temperature of the air conditioner in the current operating mode and the second preset temperature, control the operating frequency of the compressor to decrease, and control the in-vehicle blower to operate at a set medium speed gear.

7. The control method of the vehicle-mounted air conditioner according to claim 6, characterized in that, Combined with the cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower includes at least one of the following: If the cab temperature in the current operating mode is less than the difference between the return air temperature of the air conditioner in the current operating mode and the third preset temperature, control the operating frequency of the compressor to stop decreasing, control the compressor to maintain the current operating frequency, and control the in-vehicle blower to still operate at the medium speed gear; If the cab temperature in the current operating mode is greater than or equal to the difference between the return air temperature of the air conditioner in the current operating mode and the third preset temperature and less than the return air temperature of the air conditioner in the current operating mode, control the operating frequency of the compressor to continue decreasing until the operating frequency of the compressor decreases to the set minimum operating frequency, then control the compressor to operate at the minimum operating frequency, and control the in-vehicle blower to operate at the set low speed gear until the cab temperature in the current operating mode is equal to the return air temperature of the air conditioner in the current operating mode, then control the compressor to stop operating; If the cab temperature in the current operating mode is greater than or equal to the return air temperature of the air conditioner in the current operating mode, control the compressor to stop operating and control the vehicle-mounted air conditioner to shut down.

8. A control device for a vehicle-mounted air conditioner, characterized in that, The vehicle-mounted air conditioner is used for a vehicle, and the vehicle has a cab and a passenger compartment; the passenger compartment has an air return opening; the vehicle-mounted air conditioner also has a compressor and an in-vehicle blower; the control device of the vehicle-mounted air conditioner includes an acquisition unit configured to acquire the temperature at the air return opening of the vehicle-mounted air conditioner, denoted as the return air temperature of the air conditioner; acquire the temperature of the cab of the vehicle-mounted air conditioner, denoted as the cab temperature; and acquire the set temperature of the vehicle-mounted air conditioner, denoted as the target temperature of the air conditioner; the cab temperature is used to reflect the actual temperature inside the vehicle; A control unit configured to, in the current operating mode of the vehicle-mounted air conditioner, based on the target temperature of the air conditioner in the current operating mode and according to at least one of the return air temperature of the air conditioner in the current operating mode and the cab temperature in the current operating mode, control the operating frequency of the compressor and the operating gear of the in-vehicle blower; wherein, the current operating mode of the vehicle-mounted air conditioner is a refrigeration mode or a heating mode; The control unit, in the refrigeration mode, if the return air temperature of the air conditioner in the current operating mode changes to be less than or equal to the difference between the target temperature of the air conditioner in the current operating mode and the second preset temperature, combined with the cab temperature in the current operating mode, controls the operating frequency of the compressor and the operating gear of the in-vehicle blower; The control unit, in the heating mode, if the return air temperature of the air conditioner in the current operating mode changes to be greater than or equal to the sum of the target temperature of the air conditioner in the current operating mode and the second preset temperature, then in combination with the cab temperature in the current operating mode, controls the operating frequency of the compressor and the operating gear of the in-vehicle blower.

9. The control device for a vehicle-mounted air conditioner according to claim 8, wherein The control unit, when the current operating mode of the vehicle-mounted air conditioner is the cooling mode, based on the target temperature of the air conditioner in the current operating mode, and according to at least one of the return air temperature of the air conditioner in the current operating mode and the cab temperature in the current operating mode, controls the operating frequency of the compressor and the operating gear of the in-vehicle blower, including at least one of the following: If the return air temperature of the air conditioner in the current operating mode is greater than the sum of the target temperature of the air conditioner in the current operating mode and the first preset temperature, then controls the operating frequency of the compressor to increase at a set frequency increase rate, and controls the in-vehicle blower to operate at a set high gear. If the return air temperature of the air conditioner in the current operating mode is greater than the target temperature of the air conditioner in the current operating mode and less than or equal to the sum of the target temperature of the air conditioner in the current operating mode and the first preset temperature, then controls the operating frequency of the compressor to increase at a decreasing frequency increase rate, and controls the in-vehicle blower to still operate at the high gear.

10. The control device for an in-vehicle air conditioner according to claim 9, wherein The control unit, when the current operating mode of the vehicle-mounted air conditioner is the cooling mode, based on the target temperature of the air conditioner in the current operating mode, and according to at least one of the return air temperature of the air conditioner in the current operating mode and the cab temperature in the current operating mode, controls the operating frequency of the compressor and the operating gear of the in-vehicle blower, further includes: If the return air temperature of the air conditioner in the current operating mode changes to be less than or equal to the target temperature of the air conditioner in the current operating mode and greater than the difference between the target temperature of the air conditioner in the current operating mode and the second preset temperature, then controls the operating frequency of the compressor to decrease, and controls the in-vehicle blower to operate at a set medium gear.

11. The control device for a vehicle-mounted air conditioner according to claim 10, characterized in that, The control unit, in combination with the cab temperature in the current operating mode, controls the operating frequency of the compressor and the operating gear of the in-vehicle blower, including at least one of the following: If the cab temperature in the current operating mode is greater than the sum of the return air temperature of the air conditioner in the current operating mode and the third preset temperature, then controls the operating frequency of the compressor to stop decreasing, controls the compressor to maintain the current operating frequency, and controls the in-vehicle blower to still operate at the medium gear; If the cab temperature in the current operating mode is less than or equal to the sum of the air return temperature of the air conditioner in the current operating mode and the third preset temperature, and greater than the air return temperature of the air conditioner in the current operating mode, then control the operating frequency of the compressor to continue to decrease in frequency until the operating frequency of the compressor decreases to the set minimum operating frequency, then control the compressor to operate at the minimum operating frequency, and control the in-vehicle blower to operate at the set low gear until the cab temperature in the current operating mode is equal to the air return temperature of the air conditioner in the current operating mode, then control the compressor to stop operating; If the cab temperature in the current operating mode is less than or equal to the air return temperature of the air conditioner in the current operating mode, then control the compressor to stop operating and control the vehicle-mounted air conditioner to shut down.

12. The control device of the vehicle-mounted air conditioner according to any one of claims 8 to 11, characterized in that, The control unit, when the current operating mode of the vehicle-mounted air conditioner is the heating mode, based on the air conditioner target temperature in the current operating mode, and according to at least one of the air return temperature of the air conditioner in the current operating mode and the cab temperature in the current operating mode, controls the operating frequency of the compressor and the operating gear of the in-vehicle blower, including at least one of the following: If the air return temperature of the air conditioner in the current operating mode is less than the difference between the air conditioner target temperature in the current operating mode and the first preset temperature, then control the operating frequency of the compressor to increase in frequency at the set frequency increase rate, and control the in-vehicle blower to operate at the set high gear; If the air return temperature of the air conditioner in the current operating mode is greater than or equal to the difference between the air conditioner target temperature in the current operating mode and the first preset temperature, and less than the air conditioner target temperature in the current operating mode, then control the operating frequency of the compressor to decrease at a decreasing rate of the set frequency increase rate, and control the in-vehicle blower to still operate at the high gear.

13. The control device for a vehicle-mounted air conditioner according to claim 12, characterized in that, The control unit, when the current operating mode of the vehicle-mounted air conditioner is the heating mode, based on the air conditioner target temperature in the current operating mode, and according to at least one of the air return temperature of the air conditioner in the current operating mode and the cab temperature in the current operating mode, controls the operating frequency of the compressor and the operating gear of the in-vehicle blower, further includes: If the air return temperature of the air conditioner in the current operating mode changes to be greater than or equal to the air conditioner target temperature in the current operating mode, and less than the sum of the air conditioner target temperature in the current operating mode and the second preset temperature, then control the operating frequency of the compressor to decrease in frequency, and control the in-vehicle blower to operate at the set medium gear.

14. The control device for a vehicle-mounted air conditioner according to claim 13, characterized in that, Combined with the cab temperature in the current operating mode, controlling the operating frequency of the compressor and the operating gear of the in-vehicle blower includes at least one of the following: If the cab temperature in the current operating mode is less than the difference between the air return temperature of the air conditioner in the current operating mode and the third preset temperature, then control the operating frequency of the compressor to stop decreasing, control the compressor to maintain the current operating frequency, and control the in-vehicle blower to still operate at the medium gear; If the cab temperature in the current operating mode is greater than or equal to the difference between the air return temperature of the air conditioner in the current operating mode and the third preset temperature, and less than the air return temperature of the air conditioner in the current operating mode, then control the operating frequency of the compressor to continue to decrease in frequency until the operating frequency of the compressor decreases to the set minimum operating frequency, then control the compressor to operate at the minimum operating frequency, and control the in-vehicle blower to operate at the set low gear until the cab temperature in the current operating mode is equal to the air return temperature of the air conditioner in the current operating mode, then control the compressor to stop operating; If the cab temperature in the current operating mode is greater than or equal to the air return temperature of the air conditioner in the current operating mode, then control the compressor to stop operating and control the vehicle-mounted air conditioner to shut down.

15. A vehicle-mounted air conditioner, characterized in that, Comprising: The control device of the vehicle-mounted air conditioner according to any one of claims 8 to 14.

16. A storage medium, characterized in that, The storage medium includes a stored program, wherein when the program runs, it controls the device where the storage medium is located to execute the control method of the vehicle-mounted air conditioner according to any one of claims 1 to 7.

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