Method for controlling operating state of air conditioner compressor and vehicle

Abstract

The application discloses a kind of control method and vehicle of air conditioner compressor operating state, method includes obtaining evaporator surface temperature signal;According to evaporator surface temperature signal, control compressor opens or closes;When compressor opens, obtains pressure feedback signal, and according to pressure feedback signal, determine the pressure condition of compressor;When the pressure of compressor is normal, obtain current room temperature signal and air conditioner current state signal;According to current room temperature signal and air conditioner current state signal, determine the operating temperature of compressor;According to current room temperature signal, determine the operating time of compressor;According to current room temperature signal, the operating temperature and operating time of compressor, determine engine idle speed promotion request, to ensure the operating state stability of compressor.Utilize above-mentioned method, the accurate control of compressor operating state is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a control method for the running state of an air conditioner compressor and a vehicle. BACKGROUND

[0002] For an automobile air conditioner, a controller is the only interface for passengers in the vehicle to interact with the air conditioning system. On the controller panel of the automobile air conditioner, there are usually knobs or buttons such as Auto, A / C (compressor switch control), temperature setting, air speed adjustment, air outlet mode setting, inside-out circulation setting, defrosting, and seat heating, which are used to control the running state of the automobile air conditioner. In order to meet the comfort of passengers in the vehicle, the control of the compressor of the automobile air conditioner has become a problem of concern today.

[0003] Most of the existing controls for compressors currently use a compressor clutch method to control the running state of the compressor. However, this method cannot accurately control the opening and closing of the compressor, and thus cannot accurately determine the intervention timing and operating temperature of the compressor, resulting in the running state of the compressor being unable to be accurately controlled, affecting the quality and operating efficiency of the compressor, and thus leading to poor refrigeration effect of the vehicle. SUMMARY

[0004] The present application provides a control method for the running state of an air conditioner compressor and a vehicle, to accurately control the operating temperature of the compressor, accurately control the running state of the compressor, improve the quality and operating efficiency of the compressor, and ensure the refrigeration effect of the vehicle.

[0005] In a first aspect, the present application provides a control method for the running state of an air conditioner compressor, comprising:

[0006] obtaining an evaporator surface temperature signal;

[0007] controlling the opening or closing of the compressor according to the evaporator surface temperature signal;

[0008] when the compressor is opened, obtaining a pressure feedback signal and determining the pressure condition of the compressor according to the pressure feedback signal;

[0009] when the pressure of the compressor is normal, obtaining a current room temperature signal and an air conditioner current state signal;

[0010] determining the operating temperature of the compressor according to the current room temperature signal and the air conditioner current state signal;

[0011] determining the operating time of the compressor according to the current room temperature signal;

[0012] determining an engine idle speed boost request according to the current room temperature signal, the operating temperature and the operating time of the compressor, to ensure the stability of the running state of the compressor.

[0013] Optionally, the compressor is controlled to start or stop according to the evaporator surface temperature signal, comprising:

[0014] When the evaporator surface temperature signal is greater than or equal to a first preset temperature, the compressor is controlled to start;

[0015] When the evaporator surface temperature signal is less than the first preset temperature, the compressor is controlled to stop.

[0016] Optionally, the operation mode of the compressor is a manual mode; before the evaporator surface temperature signal is acquired, further comprising:

[0017] An air conditioning start instruction is acquired;

[0018] According to the air conditioning start instruction, the electromagnetic clutch is controlled to be attracted.

[0019] Optionally, the current air conditioning state signal comprises a compressor working efficiency, an engine speed signal, a compressor torque signal, an air conditioning maximum mass flow signal and a mixed damper cold air opening degree ratio signal;

[0020] According to the current room temperature signal and the current air conditioning state signal, the operation temperature of the compressor is determined, comprising:

[0021] According to the current room temperature signal, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioning maximum mass flow signal and the mixed damper cold air opening degree ratio signal, the operation temperature of the compressor is determined.

[0022] Optionally, according to the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioning maximum mass flow signal and the mixed damper cold air opening degree ratio signal, the operation temperature of the compressor is determined, comprising:

[0023] According to the current room temperature signal, a current room temperature enthalpy value is determined;

[0024] According to the current room temperature enthalpy value, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioning maximum mass flow signal and the mixed damper cold air opening degree ratio signal, an operation temperature enthalpy value of the compressor is determined;

[0025] According to the operation temperature enthalpy value, the operation temperature of the compressor is determined.

[0026] Optionally, according to the current room temperature enthalpy value, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioning maximum mass flow signal and the mixed damper cold air opening degree ratio signal, the operation temperature enthalpy value of the compressor is determined, comprising:

[0027] Determine the running temperature enthalpy value of the compressor based on the current room temperature enthalpy value, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioner maximum mass flow signal and the mixed damper cold air opening ratio signal according to a first calculation formula;

[0028] The first calculation formula is H aircondition = H inter -y airefficiency *(w engine *T compress ) / (M maxmass *B proportion )

[0029] Wherein, H aircondition is the running temperature enthalpy value of the compressor, H inter is the current room temperature enthalpy value, y airefficiency is the compressor working efficiency, w engine is the engine speed signal, T compress is the compressor torque signal, M maxmass is the air conditioner maximum mass flow signal, and B proportion is the mixed damper cold air opening ratio signal.

[0030] Optionally, the running time of the compressor is a preset time.

[0031] After determining the running time of the compressor according to the current room temperature signal, the method further comprises:

[0032] When the actual running time of the compressor is less than the preset time, the compressor is forced to run to the preset time.

[0033] Optionally, the engine idle speed raising request is determined according to the current room temperature signal, the running temperature and the running time of the compressor, and the method comprises:

[0034] Determine the temperature difference according to the current room temperature signal and the running temperature of the compressor.

[0035] When the temperature difference is greater than or equal to a preset temperature difference and the running time is greater than or equal to a second preset time, control the engine to send an idle speed raising request;

[0036] When the temperature difference is less than the preset temperature difference or the running time is less than the second preset time, control the engine to stop sending the idle speed raising request.

[0037] In a second aspect, the present application provides a control device for the running state of an air conditioner compressor, comprising:

[0038] A first signal acquisition module is configured to acquire an evaporator surface temperature signal and a refrigerant pressure signal.

[0039] A compressor control module is configured to control the compressor to start or stop according to the evaporator surface temperature signal and the refrigerant pressure signal.

[0040] A compressor pressure determination module is configured to obtain a pressure feedback signal when the compressor starts, and determine the pressure condition of the compressor according to the pressure feedback signal.

[0041] A second signal obtaining module is configured to obtain a current room temperature signal and an air conditioner current state signal when the pressure of the compressor is normal.

[0042] An operating temperature determination module is configured to determine the operating temperature of the compressor according to the current room temperature signal and the air conditioner current state signal.

[0043] An operating time determination module is configured to determine the operating time of the compressor according to the current room temperature signal.

[0044] An idle speed boost request determination module is configured to determine an engine idle speed boost request according to the current room temperature signal, the operating temperature and the operating time of the compressor, so as to ensure the stable operation of the compressor.

[0045] In a third aspect, the present application provides a vehicle for implementing the above-mentioned air conditioner compressor operation state control method.

[0046] The technical scheme of the present application comprises the following steps: obtaining an evaporator surface temperature signal; controlling the compressor to start or stop according to the evaporator surface temperature signal; obtaining a pressure feedback signal when the compressor starts, and determining the pressure condition of the compressor according to the pressure feedback signal; obtaining a current room temperature signal and an air conditioner current state signal when the pressure of the compressor is normal; determining the operating temperature of the compressor according to the current room temperature signal and the air conditioner current state signal; determining the operating time of the compressor according to the current room temperature signal; and determining an engine idle speed boost request according to the current room temperature signal, the operating temperature and the operating time of the compressor, so as to ensure the stable operation of the compressor. By using the above-mentioned method, the accurate control of the starting and stopping of the compressor, and the accurate control of the operation state of the compressor are realized, the quality and the operation efficiency of the compressor are improved, and the refrigeration effect of the vehicle is ensured.

[0047] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on these drawings.

[0049] Figure 1 A flow chart of a control method of an air conditioner compressor operating state provided by an embodiment of the present application;

[0050] Figure 2 A flow chart of a second control method of an air conditioner compressor operating state provided by an embodiment of the present application;

[0051] Figure 3 A structural schematic diagram of a control device of an air conditioner compressor operating state provided by an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to make the technical personnel in the art better understand the present application, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should be within the scope of the present application.

[0053] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0054] In an embodiment, Figure 1 A flow chart of a control method of an air conditioner compressor operating state provided by an embodiment of the present application, the present embodiment can be applicable to the case of accurately controlling the operating state of an air conditioner compressor of a commercial vehicle. The method can be executed by a control device of an air conditioner compressor operating state, which can be realized in the form of hardware and / or software, and can be configured in a vehicle. For example,Figure 1 As shown, the method comprises:

[0055] S110, obtaining an evaporator surface temperature signal.

[0056] The evaporator surface temperature signal is the temperature at which the refrigerant boils in the evaporator, that is, the critical temperature at which the refrigerant changes from liquid to gas.

[0057] Specifically, when the compressor operation mode is an automatic mode, the display mode of the automatic mode can include but is not limited to being determined by the user pressing the "Auto" key. When the user presses the "Auto" key, it indicates that the user wants to start the compressor automatic operation mode. At this time, the evaporator surface temperature signal is obtained. The method of obtaining the evaporator surface temperature signal can include but is not limited to being collected by a temperature sensor.

[0058] S120, controlling the compressor to start or stop according to the evaporator surface temperature signal.

[0059] Specifically, after obtaining the evaporator surface temperature signal, when the evaporator surface temperature satisfies the corresponding preset condition according to the evaporator surface temperature signal, it indicates that the compressor start condition is met at this time, and the compressor is controlled to start. When the evaporator surface temperature signal does not satisfy the corresponding preset condition, the compressor is controlled to stop.

[0060] S130, when the compressor is started, obtaining a pressure feedback signal and determining the pressure condition of the compressor according to the pressure feedback signal.

[0061] The pressure feedback signal is a pressure signal fed back by a three-state pressure switch after determining the pressure condition of the compressor according to the obtained refrigerant pressure signal. The refrigerant pressure signal is the pressure signal in the refrigeration pipeline. The refrigerant pressure signal is related to the temperature. When the temperature is too high or too low, the refrigerant pressure signal will be abnormal, which will cause the compressor to leak or block, etc.

[0062] Specifically, after the compressor is turned on, the three-state pressure switch can collect and obtain the refrigerant pressure signal. At this time, the three-state pressure switch can judge the refrigerant pressure signal. The three-state pressure switch includes a low-pressure switch, a medium-pressure switch, and a high-pressure switch. When the refrigerant pressure is too low, i.e., lower than the set low-pressure threshold, the low-pressure part of the three-state pressure switch will trigger, cutting off the control circuit of the compressor to protect the compressor from damage. If the refrigerant pressure is too high, exceeding the set high-pressure threshold, the high-pressure part of the three-state pressure switch will trigger, also cutting off the control circuit of the compressor to prevent dangerous situations such as explosion caused by excessive pressure in the refrigeration pipeline. When the refrigerant pressure reaches the set medium-pressure threshold, the medium-pressure part of the three-state pressure switch will trigger, controlling the condenser fan circuit to turn on or speed up the fan to improve cooling effect and reduce high-pressure, ensuring that the compressor operates within a safe working pressure range. At the same time, the three-state pressure switch will feedback a pressure feedback signal, which includes a normal pressure signal and an abnormal pressure signal. When receiving the normal pressure signal, it can be determined that the pressure of the compressor is within the normal pressure range, and the compressor is running normally. When the abnormal pressure signal is obtained, it can be determined that the compressor is in a closed state, and then the working state of the compressor can be adjusted or protective measures can be taken according to the actual situation.

[0063] S140, obtaining a current room temperature signal and an air conditioner current state signal when the pressure of the compressor is normal.

[0064] Specifically, when it is determined that the pressure of the compressor is normal, the running state of the compressor needs to be determined, at which time the current room temperature signal and the air conditioner current state signal can be obtained. The current room temperature signal can be obtained by, but not limited to, a thermometer or a temperature sensor, etc. The air conditioner current state signal includes at least compressor working efficiency, engine speed signal, compressor torque signal, air conditioner maximum mass flow signal, and mixed damper cold air opening degree ratio signal. The compressor working efficiency, compressor torque signal, air conditioner maximum mass flow signal, and mixed damper cold air opening degree ratio signal are all calibration values, which can be directly obtained by user input calibration values. The engine speed signal can be obtained by, but not limited to, a speed sensor, etc.

[0065] S150, determining the running temperature of the compressor according to the current room temperature signal and the air conditioner current state signal.

[0066] The running temperature of the compressor represents the temperature range in which the compressor can normally operate. In this embodiment, the running temperature of the compressor can be the actual blown temperature of the air conditioner.

[0067] Specifically, after obtaining the current room temperature signal and the current state signal of the air conditioner, the running temperature of the compressor can be determined according to the current room temperature signal and the current state signal of the air conditioner by using a preset calculation formula.

[0068] S160, determining the running time of the compressor according to the current room temperature signal.

[0069] Specifically, after determining the running temperature of the compressor, the running time of the compressor also needs to be determined. In this embodiment, the running time of the compressor can be determined according to the current room temperature signal by using the preset corresponding relationship between the current room temperature and the running time of the compressor. After inputting the current room temperature signal into the preset corresponding relationship, the running time of the compressor can be determined. The running time of the compressor is the minimum running time required after the compressor is turned on, so as to prevent the interval between the turning on and turning off of the compressor being too short, which affects the performance and service life of the compressor.

[0070] S170, determining the engine idle speed increase request according to the current room temperature signal, the running temperature and the running time of the compressor, so as to ensure the stable running state of the compressor.

[0071] The engine idle speed increase request includes a request signal of the engine idle speed increase and a request level of the engine idle speed increase. The request signal of the engine idle speed increase is a signal indicating whether the engine idle speed increase is needed, and the request level is the level of the request for the engine idle speed increase. For example, the request level can include level 1, level 2 and level 3. Different request levels correspond to different engine speeds. The engine speed corresponding to level 1 is the lowest, and the engine speed corresponding to level 3 is the highest.

[0072] Specifically, when the air conditioner compressor is working, it will increase the load of the engine, because the air conditioner compressor is driven by the engine, and when the compressor is working, the power of the engine needs to be consumed. In order to maintain the normal and stable operation of the engine and ensure the refrigeration effect, the idle speed of the engine needs to be increased to provide additional power to ensure the stable operation of the engine and the compressor. Therefore, in order to ensure the stable running state of the compressor, it is also necessary to confirm the engine idle speed increase request. In this embodiment, when the temperature difference between the current room temperature signal and the running temperature of the compressor and the running time of the compressor all satisfy the corresponding preset conditions, the engine idle speed increase request is sent to the engine, so that the idle speed of the engine is increased, so as to ensure that the engine can maintain a stable speed when the load of the engine is increased due to the working of the compressor, avoid the speed drop or engine shaking caused by the sudden increase of the load, improve the stability of the engine, and thus ensure that the running state of the compressor is always stable.

[0073] It can be understood that the main purpose of the air-conditioning engine idle speed boost request is to provide power for improving and maintaining the thermal environment comfort of the passenger compartment. In summer, by increasing the engine idle speed, the rotation speed of the compressor driven by the engine is also increased, thereby increasing the refrigeration capacity. In winter, by increasing the engine idle speed, more heat can be generated at the engine idle speed, thereby increasing the temperature of the passenger compartment.

[0074] The technical scheme of the embodiment of the present application comprises the following steps: obtaining an evaporator surface temperature signal; controlling the compressor to start or stop according to the evaporator surface temperature signal; obtaining a pressure feedback signal when the compressor is started, and determining the pressure condition of the compressor according to the pressure feedback signal; obtaining a current room temperature signal and an air conditioner current state signal when the pressure of the compressor is normal; determining the running temperature of the compressor according to the current room temperature signal and the air conditioner current state signal; determining the running time of the compressor according to the current room temperature signal; and determining an engine idle speed boost request according to the current room temperature signal, the running temperature and the running time of the compressor, so as to ensure the stability of the running state of the compressor. By using the above method, the accurate control of the starting and stopping of the compressor and the accurate control of the running state of the compressor are realized, the quality and the running efficiency of the compressor are improved, and the refrigeration effect of the vehicle is ensured.

[0075] Optionally, the running mode of the compressor is a manual mode; before S110, obtaining an evaporator surface temperature signal, the method further comprises: obtaining a refrigeration start instruction; and controlling the electromagnetic clutch to be attracted according to the refrigeration start instruction.

[0076] The refrigeration start instruction can be an A / C key of the compressor.

[0077] Specifically, when the running mode of the compressor is the manual mode, before the compressor is controlled to start, the refrigeration start instruction pressed by the user needs to be obtained. When the user presses the A / C key, it indicates that the user starts the compressor in the manual mode, and then the electromagnetic clutch is controlled to be attracted, so that the engine can drive the compressor to start through the electromagnetic clutch.

[0078] In another specific embodiment, Figure 2 The flow chart of the second air-conditioning compressor running state control method provided by the embodiment of the present application is provided, and the specific implementation manner of the air-conditioning compressor running state control method is refined, as shown in Figure 2 The method comprises the following steps:

[0079] S210, obtaining an evaporator surface temperature signal.

[0080] S220, when the evaporator surface temperature signal is greater than or equal to a first preset temperature, controlling the compressor to start; and when the evaporator surface temperature signal is less than the first preset temperature, controlling the compressor to stop.

[0081] Specifically, it is determined that the evaporator surface temperature signal is greater than or equal to the first preset temperature, and the first preset temperature can be the opening temperature of the compressor. For example, the first preset temperature can be any temperature value in the range of 90-110°C, which can be determined according to actual conditions and is not limited herein. When it is determined that the evaporator surface temperature signal is greater than or equal to the first preset temperature, it indicates that the evaporator surface temperature has reached the opening temperature of the compressor, and the compressor is controlled to be turned on. When it is determined that the evaporator surface temperature signal is less than the first preset temperature, it indicates that the evaporator surface temperature is too low and has not reached the opening temperature of the compressor. In order to prevent the air conditioner from frosting, the compressor needs to be controlled to be turned off.

[0082] S230, when the compressor is turned on, a pressure feedback signal is obtained, and the pressure condition of the compressor is determined according to the pressure feedback signal.

[0083] S240, when the pressure of the compressor is normal, a current room temperature signal and an air conditioner current state signal are obtained.

[0084] The air conditioner current state signal includes the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioner maximum mass flow signal, and the mixed damper cold air opening degree ratio signal.

[0085] The compressor working efficiency, the compressor torque signal, the air conditioner maximum mass flow signal, and the mixed damper cold air opening degree ratio signal are all preset calibration quantities, and the above parameters are determined after the compressor is turned on and runs. For example, the compressor working efficiency can be 80% or 90%, and the mixed damper cold air opening degree ratio signal can be 70% or 80%, etc. The engine speed signal is the real-time speed of the engine, which can be obtained through a speed sensor, etc.

[0086] S250, the running temperature of the compressor is determined according to the current room temperature signal, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioner maximum mass flow signal, and the mixed damper cold air opening degree ratio signal.

[0087] The above step can be further divided into: determining the current room temperature enthalpy value according to the current room temperature signal; determining the running temperature enthalpy value of the compressor according to the current room temperature enthalpy value, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioner maximum mass flow signal, and the mixed damper cold air opening degree ratio signal; and determining the running temperature of the compressor according to the running temperature enthalpy value.

[0088] Specifically, after the current room temperature signal is obtained, the current room temperature enthalpy value corresponding to the current room temperature signal can be obtained by table lookup based on the Kirchhoff's law according to the current room temperature signal. After the current room temperature enthalpy value is determined, the running temperature enthalpy value of the compressor needs to be determined, which can be determined by using the first calculation formula, i.e.aircondition = H inter - y airefficiency * w engine * T compress ) / (M maxmass * B proportion ), wherein H aircondition is the operating temperature enthalpy of the compressor, H inter is the current room temperature enthalpy, y airefficiency is the operating efficiency of the compressor, w engine is the engine speed signal, T compress is the compressor torque signal, M maxmass is the maximum mass flow signal of the air conditioner, and B proportion is the mixed damper cold air opening ratio signal. After the current room temperature enthalpy is determined, the current room temperature enthalpy, the operating efficiency of the compressor, the engine speed signal, the compressor torque signal, the maximum mass flow signal of the air conditioner, and the mixed damper cold air opening ratio signal are all known, and the operating temperature enthalpy H aircondition of the corresponding compressor can be calculated by substituting the known quantities into the first calculation formula. After the operating temperature enthalpy H aircondition is determined, the operating temperature of the compressor corresponding to the operating temperature enthalpy can be obtained based on the Kirchhoff's law through table lookup or other methods. Thus, the operating temperature of the compressor is obtained.

[0089] S260, determining the operating time of the compressor according to the current room temperature signal.

[0090] The operating time of the compressor is a preset time, which is the same as the minimum operating time in the above embodiment.

[0091] S270, when the actual operating time of the compressor is less than the preset time, controlling the compressor to forcibly operate to the preset time.

[0092] Specifically, to ensure the performance and service life of the compressor, when the compressor is turned on, the compressor needs to be operated for at least a preset time. When the actual operating time of the compressor is less than the preset time, the compressor is forcibly controlled to continue operating until the preset time is reached, so as to avoid frequent start-stop of the compressor and damage to the compressor.

[0093] S280, determining the temperature difference according to the current room temperature signal and the operating temperature of the compressor.

[0094] S290, when the temperature difference is greater than or equal to a preset temperature difference and the operating time is greater than or equal to a second preset time, controlling to send an idle speed increase request to the engine; when the temperature difference is less than the preset temperature difference or the operating time is less than the second preset time, controlling to stop sending the idle speed increase request to the engine.

[0095] Specifically, after the current room temperature signal and the operating temperature of the compressor are determined, the current room temperature signal and the operating temperature of the compressor are subtracted to obtain a temperature difference, and when the temperature difference is greater than or equal to a preset temperature difference and the operating time of the compressor is greater than or equal to a second preset time, the second preset time is greater than the first preset time, and the operating time of the compressor is the actual operating time, it indicates that the load of the compressor is large, and the engine needs to increase the idle speed to ensure the stable operation of the compressor, and then the idle speed increase request is sent to the engine, that is, the idle speed increase signal and the idle speed increase level are sent, so that the engine increases the speed according to the idle speed increase level, and the stable operation of the engine and the compressor is ensured. When the temperature difference is less than the preset temperature difference, or the operating time is less than the second preset time, it indicates that the engine at this time can drive the compressor to operate stably, and the idle speed increase request is stopped.

[0096] The technical scheme of the embodiment of the application comprises the following steps: obtaining an evaporator surface temperature signal; when the evaporator surface temperature signal is greater than or equal to a first preset temperature, controlling the compressor to start; when the evaporator surface temperature signal is less than the first preset temperature, controlling the compressor to stop; determining the operating temperature of the compressor according to a current room temperature signal, a compressor working efficiency, an engine speed signal, a compressor torque signal, an air conditioner maximum mass flow signal and a mixed damper cold air opening degree proportion signal; determining the operating time of the compressor according to the current room temperature signal; when the actual operating time of the compressor is less than a preset time, controlling the compressor to operate compulsorily to the preset time; determining a temperature difference according to the current room temperature signal and the operating temperature of the compressor; when the temperature difference is greater than a preset temperature difference and the actual operating time is greater than or equal to a second preset time, controlling the idle speed increase request to be sent to the engine; and when the temperature difference is less than the preset temperature difference, or the operating time is less than or equal to the second preset time, controlling the idle speed increase request to be stopped. By using the above method, the operating temperature of the compressor is accurately determined, the operating state of the compressor is accurately controlled, the operating stability of the compressor is ensured, and the performance and service life of the compressor are improved.

[0097] In another embodiment, Figure 3 A structure diagram of a control device for an air conditioner compressor operating state provided by the application is shown in FIG. 1. Figure 3 The device comprises:

[0098] A first signal acquisition module 110 is configured to acquire an evaporator surface temperature signal and a refrigerant pressure signal.

[0099] A compressor control module 120 is configured to control the compressor to start or stop according to the evaporator surface temperature signal and the refrigerant pressure signal.

[0100] The compressor pressure determining module 130 is configured to acquire a pressure feedback signal when the compressor is started, and determine the pressure condition of the compressor according to the pressure feedback signal.

[0101] The second signal acquiring module 140 is configured to acquire a current room temperature signal and an air conditioner current state signal when the pressure of the compressor is normal.

[0102] The running temperature determining module 150 is configured to determine the running temperature of the compressor according to the current room temperature signal and the air conditioner current state signal.

[0103] The running time determining module 160 is configured to determine the running time of the compressor according to the current room temperature signal.

[0104] The idle speed boost request determining module 170 is configured to determine an engine idle speed boost request according to the current room temperature signal, the running temperature and the running time of the compressor, so as to ensure the stable running state of the compressor.

[0105] The control device for the running state of the air conditioner compressor provided in the embodiment of the application can execute the control method for the running state of the air conditioner compressor provided in any embodiment of the application, and has the function modules and beneficial effects corresponding to the execution method.

[0106] In another optional embodiment, the compressor control module 120 can also be configured to control the compressor to start when the evaporator surface temperature signal is greater than or equal to the first preset temperature, and control the compressor to stop when the evaporator surface temperature signal is less than the first preset temperature.

[0107] In another optional embodiment, the control method further comprises an electromagnetic clutch control module configured to acquire a refrigeration start instruction, and control the electromagnetic clutch to be attracted according to the refrigeration start instruction.

[0108] In another optional embodiment, the running temperature determining module 150 can also be configured to determine the running temperature of the compressor according to the current room temperature signal, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioner maximum mass flow signal and the mixed damper cold air opening degree proportion signal.

[0109] In another optional embodiment, the running temperature determining module 150 can also be configured to determine a current room temperature enthalpy value according to the current room temperature signal, determine a running temperature enthalpy value of the compressor according to the current room temperature enthalpy value, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioner maximum mass flow signal and the mixed damper cold air opening degree proportion signal, and determine the running temperature of the compressor according to the running temperature enthalpy value.

[0110] In another optional embodiment, the running temperature determining module 150 can also be configured to determine the running temperature enthalpy value of the compressor based on a first calculation formula according to the current room temperature enthalpy value, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioner maximum mass flow signal and the mixed damper cold air opening degree proportion signal; the first calculation formula is as follows: H aircondition = H inter -y airefficiency *(w engine *T compress ) / (M maxmass *B proportion ); wherein H aircondition is the running temperature enthalpy value of the compressor, H inter is the current room temperature enthalpy value, y airefficiency is the compressor working efficiency, w engine is the engine speed signal, T compress is the compressor torque signal, M maxmass is the air conditioner maximum mass flow signal, and B proportion is the mixed damper cold air opening degree proportion signal.

[0111] In another optional embodiment, the control method further comprises: a running module configured to control the compressor to forcibly run to a preset time when the actual running time of the compressor is less than the preset time.

[0112] In another optional embodiment, the idle speed boost request determining module 170 can also be configured to determine the temperature difference according to the current room temperature signal and the running temperature of the compressor; control the idle speed boost request to be sent to the engine when the temperature difference is greater than a preset temperature difference and the running time is greater than or equal to a second preset time; and control the idle speed boost request to be stopped from being sent to the engine when the temperature difference is less than or equal to the preset temperature difference or the running time is less than the second preset time.

[0113] Based on the same inventive concept, the embodiments of the present application also provide a vehicle for implementing the above-mentioned control method of the air conditioner compressor running state, which has the corresponding function modules and beneficial effects of the execution method.

[0114] It should be understood that the various forms of flow shown above can be reordered, added or deleted steps. For example, the steps described in the present application can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.

[0115] The above detailed description does not limit the scope of the application. Various modifications, combinations, sub-combinations and alternatives can be made to the detailed description. Any modification, equivalent replacement and improvement etc. made within the spirit and principle of the application shall be included in the scope of the application.

Claims

1. A control method of an operating state of an air conditioner compressor, characterized by, The method comprises the following steps: acquiring an evaporator surface temperature signal; controlling the compressor to start or stop according to the evaporator surface temperature signal; when the compressor is started, acquiring a pressure feedback signal and determining the pressure condition of the compressor according to the pressure feedback signal; when the pressure of the compressor is normal, acquiring a current room temperature signal and an air conditioner current state signal; the air conditioner current state signal comprises a compressor working efficiency, an engine speed signal, a compressor torque signal, an air conditioner maximum mass flow signal and a mixed damper cold air opening degree proportion signal; determining the operating temperature of the compressor according to the current room temperature signal and the air conditioner current state signal; determining the operating time of the compressor according to the current room temperature signal; determining an engine idle speed boost request according to the current room temperature signal, the operating temperature of the compressor and the operating time, so as to ensure the stable operation of the compressor; determining the operating temperature of the compressor according to the current room temperature signal and the air conditioner current state signal, comprising: determining a current room temperature enthalpy value according to the current room temperature signal; determining an operating temperature enthalpy value of the compressor according to the current room temperature enthalpy value, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioner maximum mass flow signal and the mixed damper cold air opening degree proportion signal; determining the operating temperature of the compressor according to the operating temperature enthalpy value.

2. The control method according to claim 1, characterized by, controlling the compressor to start or stop according to the evaporator surface temperature signal, comprising: controlling the compressor to start when the evaporator surface temperature signal is greater than or equal to a first preset temperature; controlling the compressor to stop when the evaporator surface temperature signal is less than the first preset temperature.

3. The control method according to claim 1, characterized by, The operating mode of the compressor is a manual mode; before acquiring the evaporator surface temperature signal, the method further comprises: acquiring a refrigeration start instruction; controlling the electromagnetic clutch to be attracted according to the refrigeration start instruction.

4. The control method according to claim 1, characterized by, determining the operating temperature enthalpy value of the compressor according to the current room temperature enthalpy value, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioner maximum mass flow signal and the mixed damper cold air opening degree proportion signal, comprising: determining the operating temperature enthalpy value of the compressor according to the current room temperature enthalpy value, the compressor working efficiency, the engine speed signal, the compressor torque signal, the air conditioner maximum mass flow signal and the mixed damper cold air opening degree proportion signal based on a first calculation formula; the first calculation formula is: ； wherein, is the operating temperature enthalpy value of the compressor, is the current room temperature enthalpy value, is the compressor operating efficiency, is the engine speed signal, is the compressor torque signal, is the air conditioner maximum mass flow signal, is the mixed damper cold air opening ratio signal.

5. The control method according to claim 1, characterized by, the operating time of the compressor is a preset time; after determining the operating time of the compressor according to the current room temperature signal, the method further comprises: controlling the compressor to be forced to operate to the preset time when the actual operating time of the compressor is less than the preset time.

6. The control method according to claim 1, characterized by determining the engine idle speed boost request according to the current room temperature signal, the operating temperature of the compressor and the operating time, comprising: determining a temperature difference according to the current room temperature signal and the operating temperature of the compressor; When the temperature difference is greater than or equal to a preset temperature difference and the running time is greater than or equal to a second preset time, an idle speed increase request is sent to the engine; When the temperature difference is less than the preset temperature difference or the running time is less than the second preset time, the sending of the idle speed increase request to the engine is stopped.

7. A control device for the operating status of an air conditioning compressor, characterized in that, The control method for the operating state of the air conditioner compressor according to any one of claims 1-6, comprising: a first signal acquisition module configured to acquire an evaporator surface temperature signal and a refrigerant pressure signal; a compressor control module configured to control the compressor to start or stop according to the evaporator surface temperature signal and the refrigerant pressure signal; a compressor pressure determination module configured to acquire a pressure feedback signal when the compressor is started, and determine the pressure condition of the compressor according to the pressure feedback signal; a second signal acquisition module configured to acquire a current room temperature signal and an air conditioner current state signal when the pressure of the compressor is normal; an operating temperature determination module configured to determine the operating temperature of the compressor according to the current room temperature signal and the air conditioner current state signal; a running time determination module configured to determine the running time of the compressor according to the current room temperature signal; an idle speed increase request determination module configured to determine an engine idle speed increase request according to the current room temperature signal, the operating temperature of the compressor, and the running time, so as to ensure the stable operating state of the compressor.

8. A vehicle characterized by comprising: The control method for the operating state of the air conditioner compressor according to any one of claims 1-6.

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