CN112793380B

CN112793380B - Control method and device of automobile air conditioner, storage medium and automobile air conditioner

Info

Publication number: CN112793380B
Application number: CN202011605362.5A
Authority: CN
Inventors: 王瑞强; 谭锋
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-11-25
Anticipated expiration: 2040-12-30
Also published as: CN112793380A

Abstract

The invention provides a control method and a control device of an automobile air conditioner, a storage medium and the automobile air conditioner, wherein the method comprises the following steps: after the heating mode is started on the air conditioner, when a first preset operation of a first preset key is received within n1 time, the air conditioner is controlled to enter a preset operation mode so as to melt ice and snow on an outdoor heat exchanger and/or an external fan of the air conditioner; controlling air conditioner setting components to be in corresponding first preset states respectively at the entering stage of a preset operation mode so as to enable the air conditioner to enter a refrigeration state; at the execution stage of the preset operation mode, controlling the opening of the electronic expansion valve and controlling the ascending operation of the compressor according to different sub-stages, and controlling the inner fan to operate at a first preset wind gear; and at the exit stage of the preset operation mode, controlling the electronic expansion valve to be opened to a fourth preset opening degree, controlling the compressor to operate in a frequency reduction mode at a fourth target frequency, and controlling the inner fan to operate at a first preset wind gear. According to the scheme of the invention, one-key intelligent ice melting can be realized, and the roof operation risk is avoided.

Description

Control method and device of automobile air conditioner, storage medium and automobile air conditioner

Technical Field

The invention relates to the field of control, in particular to a control method and device of an automobile air conditioner, a storage medium and the automobile air conditioner.

Background

The new energy passenger car is generally parked outdoors, and the following problems are often encountered after snowing or when the temperature is low: 1. the outdoor fan is frozen by accumulated snow or ice blocks, and the external fan cannot work normally, so that the air conditioner cannot be used normally for heating; 2. the outdoor heat exchanger is covered by accumulated snow or ice blocks, heat exchange air cannot normally and effectively circulate, and the heat exchanger cannot exchange heat, so that the heating effect of the air conditioner is poor or the air conditioner is protected and stopped. In cold winter, the air conditioner does not work or has poor effect, so that the influence on customers is caused, and the comfort level and the satisfaction degree of the customers are greatly reduced.

Disclosure of Invention

The main purpose of the present invention is to overcome the above-mentioned defects in the prior art, and to provide a control method, device, storage medium and vehicle air conditioner for vehicle air conditioner, so as to solve the problem that the outdoor fan or outdoor heat exchanger is easily covered by snow or ice after the vehicle air conditioner is snowed or when the temperature is low in the prior art.

The invention provides a control method of an automobile air conditioner, which comprises the following steps: after the air conditioner is powered on and a heating mode is started, when a first preset operation of a first preset key is received within n1 time, the air conditioner is controlled to enter a preset operation mode so as to melt ice and snow on an outdoor heat exchanger and/or an external fan of the air conditioner; at the entering stage of the preset operation mode, controlling the setting parts of the air conditioner to be in corresponding first preset states respectively so as to enable the air conditioner to enter a refrigeration state; the setting means includes: the system comprises a compressor, an outer fan, a four-way valve, an electronic expansion valve and/or an inner fan; at the execution stage of the preset operation mode, controlling the opening of the electronic expansion valve and the ascending operation of the compressor according to different sub-stages, and controlling the inner fan to operate at a first preset wind gear; and in the exit stage of the preset operation mode, controlling the electronic expansion valve to be opened to a fourth preset opening degree, controlling the compressor to operate in a frequency reduction mode at a fourth target frequency, and controlling the inner fan to operate at a first preset wind gear.

Optionally, the execution phase includes a first sub-phase, a second sub-phase and a third sub-phase; in the execution stage of the preset operation mode, controlling the opening degree of the electronic expansion valve and the operation of the compressor and the inner fan according to different sub-stages, including: in a first sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a first preset opening degree, controlling the compressor to operate according to a first target frequency, and controlling the inner fan to operate at a first preset wind gear; the fourth target frequency is less than or equal to the first target frequency; when the air conditioner meets a first preset exit condition, controlling the air conditioner to exit the first sub-stage and enter the second sub-stage; the first preset exit condition includes: the time of running at the first target frequency reaches n2 time, or the time of entering the first sub-stage reaches n3 time, or the high pressure of the system is greater than a first preset pressure value; and/or in a second sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a second preset opening degree, controlling the compressor to operate according to a second target frequency, and controlling the inner fan to operate at a first preset wind gear; the first target frequency is less than the second target frequency; when the air conditioner meets a second preset exit condition, controlling the air conditioner to exit the second sub-stage and enter the third sub-stage; the second preset exit condition includes: the time of running at a second target frequency reaches n4 time, or the time of entering the second sub-stage reaches n5 time, or the high pressure of the system is greater than a second preset pressure value; and/or in a third sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a third preset opening degree, controlling the compressor to operate according to a third target frequency, and controlling the inner fan to operate at a first preset wind gear; the second target frequency is less than the third target frequency; when the air conditioner meets a third preset exit condition, controlling the air conditioner to exit the third sub-stage and enter the exit stage; the third preset exit condition includes: and the time for entering the preset operation mode reaches n6 time, or the continuous time of the condenser outlet temperature for n7 is longer than a first temperature value, or the continuous time of the condenser outlet temperature for n8 is longer than a second temperature value, or the system high pressure is larger than a third preset pressure value.

Optionally, the method further comprises: in the exit stage of the preset operation mode, when the air conditioner meets a fourth preset exit condition, controlling the setting components to be in corresponding second preset states respectively so as to enter a restart standby stage; after the time of entering the restart standby stage reaches a preset time, controlling the air conditioner to execute a heating mode; the fourth preset exit condition includes: and the time of running at the fourth target frequency reaches n9 time, or the time of entering the exit stage reaches n10 time, or the running frequency of the compressor is less than the fourth target frequency, or the exhaust temperature of the compressor is greater than a preset exhaust temperature threshold.

Optionally, the controlling the setting components of the air conditioner to be in the corresponding first preset states respectively includes: controlling the compressor to be in a closed state, the outer fan to be in a closed state, the four-way valve to be in a closed state, the electronic expansion valve to perform reset operation, and the inner fan to be in a closed state; and when the electronic expansion valve is detected to be completely reset, controlling the inner fan to be in a closed state.

Optionally, the method further comprises: shielding low-voltage protection of the air conditioning system at the execution stage and/or the exit stage of the preset operation mode; and/or, in the execution stage and/or the exit stage of the preset operation mode, the external fan keeps a closed state; and/or in the exit stage of the preset operation mode, when the system high pressure is greater than a fourth preset pressure value, controlling the outer fan to operate at a second preset wind gear, and controlling the outer fan to be closed until the system high pressure is less than a fifth preset pressure value.

Optionally, the method further comprises: after controlling the air conditioner to enter a preset operation mode, controlling a display panel of the air conditioner to display a corresponding mode icon and/or quit countdown of the preset operation mode; and/or controlling the air conditioner to enter an exit stage of the preset operation mode when a second preset operation on a second preset key is received in the execution stage of the preset operation mode.

In another aspect of the present invention, there is provided a control apparatus of an air conditioner for a vehicle, including: the first control unit is used for controlling the air conditioner to enter a preset operation mode to melt ice and snow on an outdoor heat exchanger and/or an external fan of the air conditioner when a first preset operation of a first preset key is received within n1 time after the heating mode is started on the air conditioner; the second control unit is used for controlling the setting parts of the air conditioner to be in corresponding first preset states respectively at the entering stage of the preset operation mode so as to enable the air conditioner to enter a refrigeration state; the setting member includes: the system comprises a compressor, an outer fan, a four-way valve, an electronic expansion valve and/or an inner fan; the third control unit is used for controlling the opening of the electronic expansion valve and the up-conversion operation of the compressor according to different sub-stages and controlling the inner fan to operate at a first preset wind gear in the execution stage of the preset operation mode; and the fourth control unit is used for controlling the electronic expansion valve to be opened to a fourth preset opening degree and controlling the compressor to perform frequency reduction operation at a fourth target frequency at the exit stage of the preset operation mode, and controlling the inner fan to perform operation at a first preset wind gear.

Optionally, the execution phase includes a first sub-phase, a second sub-phase and a third sub-phase; the third control unit, at the execution stage of the preset operation mode, controls the opening degree of the electronic expansion valve and the operation of the compressor and the internal fan according to different sub-stages, and includes: in a first sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a first preset opening degree, controlling the compressor to operate according to a first target frequency, and controlling the inner fan to operate at a first preset wind gear; the fourth target frequency is less than or equal to the first target frequency; when the air conditioner meets a first preset exit condition, controlling the air conditioner to exit the first sub-stage and enter the second sub-stage; the first preset exit condition includes: the time of running at the first target frequency reaches n2 time, or the time of entering the first sub-stage reaches n3 time, or the high pressure of the system is greater than a first preset pressure value; and/or in a second sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a second preset opening degree, controlling the compressor to operate according to a second target frequency, and controlling the inner fan to operate at a first preset wind gear; the first target frequency is less than the second target frequency; when the air conditioner meets a second preset exit condition, controlling the air conditioner to exit the second sub-stage and enter the third sub-stage; the second preset exit condition includes: the time of running at a second target frequency reaches n4 time, or the time of entering the second sub-stage reaches n5 time, or the high pressure of the system is greater than a second preset pressure value; and/or in a third sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a third preset opening degree, controlling the compressor to operate according to a third target frequency, and controlling the inner fan to operate at a first preset wind gear; the second target frequency is less than the third target frequency; when the air conditioner meets a third preset exit condition, controlling the air conditioner to exit the third sub-stage and enter the exit stage; the third preset exit condition includes: and the time for entering the preset operation mode reaches n6 time, or the continuous time of the condenser outlet temperature for n7 is longer than a first temperature value, or the continuous time of the condenser outlet temperature for n8 is longer than a second temperature value, or the system high pressure is larger than a third preset pressure value.

Optionally, the method further comprises: the fifth control unit is used for controlling the setting components to be in corresponding second preset states respectively so as to enter a restarting standby stage when the air conditioner meets a fourth preset exit condition in an exit stage of the preset operation mode; the sixth control unit is used for controlling the air conditioner to execute a heating mode after the time for entering the restart standby stage reaches a preset time length; the fourth preset exit condition includes: and the time of running at the fourth target frequency reaches n9 time, or the time of entering the exit stage reaches n10 time, or the running frequency of the compressor is less than the fourth target frequency, or the exhaust temperature of the compressor is greater than a preset exhaust temperature threshold.

Optionally, the second control unit controls the setting components of the air conditioner to be in corresponding first preset states respectively, and includes: controlling the compressor to be in a closed state, the outer fan to be in a closed state, the four-way valve to be in a closed state, the electronic expansion valve to perform reset operation, and the inner fan to be in a closed state; when the electronic expansion valve is detected to be completely reset, the inner fan is controlled to be in a closed state.

Optionally, the third control unit is further configured to: shielding low-voltage protection of the air conditioning system at the execution stage of the preset operation mode; and/or the fourth control unit is further configured to: shielding the low-voltage protection of the air conditioning system at the exit stage of the preset operation mode; and/or the third control unit is further configured to: controlling the outer fan to keep a closing state at the execution stage of the preset operation mode; and/or the fourth control unit is further configured to: controlling the outer fan to keep a closing state at the exit stage of the preset operation mode; and/or the fourth control unit is further configured to: and in the exit stage of the preset operation mode, when the system high pressure is greater than a fourth preset pressure value, controlling the outer fan to operate at a second preset wind gear, and controlling the outer fan to be closed until the system high pressure is less than a fifth preset pressure value.

Optionally, the method further comprises: the display unit is used for controlling a display panel of the air conditioner to display a corresponding mode icon and/or quit the countdown of the preset operation mode after the first control unit controls the air conditioner to enter the preset operation mode; and/or the third control unit is further configured to: and in the execution stage of the preset operation mode, when a second preset operation on a second preset key is received, controlling the air conditioner to enter an exit stage of the preset operation mode.

A further aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.

In a further aspect, the present invention provides a vehicle air conditioner, comprising a processor, a memory, and a computer program stored in the memory and operable on the processor, wherein the processor executes the computer program to implement the steps of any of the methods described above.

In still another aspect, the present invention provides a vehicle air conditioner including any one of the control devices of the vehicle air conditioner.

According to the technical scheme of the invention, by carrying out the ice and snow melting operation stage by stage, the situation that an external fan cannot work normally due to the fact that the roof of a passenger car air conditioner is frozen by accumulated snow or ice blocks can be effectively avoided, and the cycle efficiency of the whole system is improved; the low-pressure protection machine can effectively prevent the outdoor heat exchanger from being stopped due to low-pressure protection caused by the fact that heat exchange air cannot normally and effectively circulate due to the fact that the outdoor heat exchanger is covered by accumulated snow or ice blocks, and can ensure normal operation of a unit and guarantee the heating effect; can improve the heating effect in the passenger train car, guarantee user's comfort level, can effectually avoid outdoor fan stall and outdoor heat exchanger to be covered the shutdown phenomenon that the system pressure that the heat transfer is not smooth to lead to is crossed low appearance by snow or ice-cube, promote the safety guarantee nature.

According to the technical scheme of the invention, the ice melting exit condition is intelligently set, so that the ice melting is ensured to be clean; conditions of different ice melting stages are reasonably set, and the reliability of the air conditioning system is accurately controlled and improved.

According to the technical scheme of the invention, snow or ice blocks covered on the outdoor heat exchanger are melted by entering the refrigeration cycle through one key, and the snow or ice blocks on the external fan are continuously melted by heat generated by the heat exchanger. The one-key intelligent ice melting logic control eliminates the operation risk caused by the traditional manual vehicle getting-on defrosting, greatly improves the ice melting efficiency, and reduces the boarding risk to 0 by improving the ice melting efficiency by over 70 percent through comparison;

according to the technical scheme of the invention, the ice melting effect is strictly controlled finally by continuously checking whether the accumulated snow on the roof or ice blocks melt completely or not in multiple stages, and the condition of incomplete ice melting or poor ice melting effect is avoided.

According to the technical scheme of the invention, the ice melting identification and/or the ice melting countdown are/is intelligently displayed, so that a user can clearly know the ice melting progress, and the intelligent ice melting is more intelligent and humanized.

The technical scheme of the invention also designs humanized emergency stop control logic, and in the intelligent ice melting process, if the ice melting needs to be stopped emergently, the ice melting control can be stopped quickly through simple operation, and the frequency-reducing shutdown protection stage (exit stage) is entered preferentially for quick shutdown, so that the damage of system components caused by the emergency brake of a compressor and the sudden change of a system due to a direct shutdown stage is avoided, the reliability of the system operation is ensured, and meanwhile, the situation that too long time is not occupied is also ensured. Even if a user leaves the air conditioner of the passenger car for a short time, the ice can be melted intelligently, heating operation can be performed according to the requirement which can be set after the ice is melted, and a driver can immediately enjoy warm in the car after returning again, so that the waiting time can be effectively saved.

According to the technical scheme of the invention, by utilizing intelligent ice melting logic control, the heating efficiency COP in cold winter can be greatly improved, so that the energy consumption of an air conditioner is effectively reduced, the power consumption of the whole vehicle is improved, and the cruising ability of the whole vehicle is greatly improved. Effectively avoid outer fan stall and outdoor heat exchanger by snow or ice-cube cover the shutdown phenomenon that the system pressure is low excessively appears that the heat transfer is not smooth, promoted the safety guarantee nature. The intelligent ice melting quitting condition is reasonably set to ensure that ice melting is clean, and the problem of poor heating comfort in the vehicle is effectively solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a method diagram illustrating an embodiment of a method for controlling an air conditioner of a vehicle according to the present invention;

FIG. 2 is a method diagram illustrating an exemplary embodiment of a method for controlling an air conditioner of a vehicle according to the present invention;

fig. 3 is a block diagram of a control device for an air conditioner of a vehicle according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to be exhaustive or exhaustive. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The traditional treatment scheme is that maintenance personnel get on the roof and use hot water for treatment or spread ice melting agent, for example, sodium chloride is melted in water, the freezing point is below-10 ℃, calcium chloride is below-20 ℃, and ice blocks are difficult to form after salt is dissolved in ice water.

The invention provides a control method of an automobile air conditioner. The automobile air conditioner is a new energy bus air conditioner.

Fig. 1 is a method schematic diagram of an embodiment of a control method of an automotive air conditioner provided by the invention.

As shown in fig. 1, the control method of the vehicle air conditioner according to one embodiment of the present invention includes at least step S110, step S120, step S130, and step S140.

Step S110, after the air conditioner is powered on and a heating mode is started, when a first preset operation of a first preset key is received within n1 time, the air conditioner is controlled to enter a preset operation mode so as to melt ice and snow on an outdoor heat exchanger and/or an external fan of the air conditioner.

The preset operation mode is used for melting ice and snow on the outdoor heat exchanger and/or the external fan of the air conditioner during operation. For example a forced ice-melt mode. For example, after a user powers on and starts a heating mode, within n1 seconds, if a 'fresh air' button is pressed for more than 12 seconds, the forced ice melting mode is entered. For example, when the user presses the 'new air' key for more than 12 seconds, the display panel sends the ice melting flag bit to the main control, and the main control receives the forced ice melting flag bit sent by the display panel within n1 seconds of power-on, so that forced ice melting can be performed.

Optionally, after controlling the air conditioner to enter a preset operation mode, controlling a display panel of the air conditioner to display a corresponding mode icon and/or to exit a countdown of the preset operation mode. For example, the display panel is controlled to display an ice melting indicator to prompt the user that the ice melting mode is currently entered.

And step S120, controlling setting components of the air conditioner to be in corresponding preset states respectively at the entering stage of the preset operation mode so as to enable the air conditioner to enter a refrigeration state.

The entering phase is a first phase of the preset operation mode, namely a preparation phase, and controls the setting part to be in a corresponding preparation state, namely a first preset state. The setting member includes: the system comprises a compressor, an outer fan, a four-way valve, an electronic expansion valve and/or an inner fan. In one embodiment, the controlling the setting components of the air conditioner to be in the corresponding first preset states respectively comprises: controlling the compressor to be in a closed state, the outer fan to be in a closed state, the four-way valve to be in a closed state, the electronic expansion valve to perform reset operation, and the inner fan to be in a closed state; and when the electronic expansion valve is detected to be completely reset, controlling the inner fan to be in a closed state. For example, in the first stage of ice melting, the frequency of the compressor is set to OFF, the frequency of the external fan is set to OFF, the four-way valve is set to OFF, the electronic expansion valve performs a reset action (for example, 480B is first opened according to a set logic, and then 520B is closed, so that the opening of the electronic expansion valve is reset to 0, and this operation can ensure that the opening of the electronic expansion valve is 0), and when the electronic expansion valve is detected to be completely reset, the internal fan is set to OFF, that is, other loads of the unit are ensured to be in a closed state, so that the electronic expansion valve is ensured to be reset. And the electronic expansion valve is ensured to be reset, so that the opening given by the program can be accurately executed.

And step S130, in the execution stage of the preset operation mode, controlling the opening of the electronic expansion valve and the up-conversion operation of the compressor according to different sub-stages, and controlling the inner fan to operate at a first preset wind gear.

Optionally, in the execution stage of the preset operation mode, the low-voltage protection of the air conditioning system is shielded to avoid the influence of the low-voltage protection on the ice melting process of the air conditioner, the ice melting process is generally in a severe winter, the low-voltage protection value of the air conditioning system is shielded to effectively ensure that the normal ice melting of the unit is not influenced by the short-time reaching of the low-voltage protection value, and the ice melting is quicker.

In some embodiments, the execution phase includes a first sub-phase, a second sub-phase, and a third sub-phase. And respectively controlling the air conditioner to perform frequency-up operation at different target frequencies (a first target frequency, a second target frequency and a third target frequency, wherein the first target frequency is less than the second target frequency and less than the third target frequency) in the first sub-stage, the second sub-stage and the third sub-stage. Optionally, during the execution phase of the preset operation mode, the external fan keeps in a closed state. Because the outdoor side is covered by ice and snow, the outdoor fan is in a closed state in order to ensure the ice melting effect, and the heat of the unit system is completely used for melting ice.

Specifically, in a first sub-stage of the execution stage, the electronic expansion valve is controlled to be opened to a first preset opening degree ps1, the compressor is controlled to operate according to a first target frequency ft1, and the internal fan is controlled to operate at a first preset wind gear (for example, a high wind gear). The first sub-stage is a second stage of the preset operation mode. When the air conditioner meets a first preset exit condition, controlling the air conditioner to exit the first sub-stage and enter the second sub-stage; the first preset exit condition includes: the time for operating at the first target frequency ft1 reaches n2 time (that is, the time for operating at the first target frequency ft1 after the frequency of the compressor is increased to the first target frequency ft1 reaches n2 time), or the time for entering the first sub-stage reaches n3 time, or the system high pressure is greater than the first preset pressure value pd1.

Optionally, in the first sub-stage, when the user manually and forcibly exits, the user exits the first sub-stage and enters the exiting stage of the preset operation mode. Specifically, when a second preset operation on a second preset key is received, the air conditioner is controlled to enter an exit stage of the preset operation mode. For example, when the user wants to temporarily exit the ice-melting mode, the user enters an exit stage of the preset operation mode by pressing the wind speed for more than 12 seconds, and then exits the preset operation mode.

For example, entering the second phase of smart ice melting (the first sub-phase of the execution phase), the actions are performed: the opening of the electronic expansion valve is forcibly controlled to ps1, low pressure is shielded (low pressure protection of a shielding system is used for avoiding entering a low pressure protection state), the target frequency of the compressor is set to ft1, the four-way valve is OFF, the inner fan is opened at a high wind gear, and the outer fan is set to be OFF; when the compressor operation frequency reaches the target frequency ft1 and the time lasts for n2 time, or the time of entering the phase reaches n3 time, or the high pressure is larger than pd1, the first sub-phase of the execution phase is exited. Or when the user manually and forcibly quits, quitting the first sub-stage, and directly entering a quitting stage of the preset operation mode to quit the preset operation mode.

In a second sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a second preset opening ps2, controlling the compressor to operate according to a second target frequency ft2, and controlling the inner fan to operate at a first preset wind gear (for example, a high wind gear); the second sub-stage is a third stage of the preset operation mode. The first target frequency ft1 is smaller than the second target frequency ft2; when the air conditioner meets a second preset exit condition, controlling the air conditioner to exit the second sub-stage and enter the third sub-stage; the second preset exit condition includes: the time of the operation at the second target frequency ft2 reaches n4 time (that is, the time of the operation at the second target frequency ft2 after the frequency of the compressor is increased to the second target frequency ft2 reaches n4 time), or the time of entering the second sub-stage reaches n5 time, or the system high pressure is greater than the second preset pressure value pd2.

Optionally, in the second sub-stage, when the user manually and forcibly exits, the user exits from the second sub-stage and enters into an exit stage of the preset operation mode. Specifically, when a second preset operation on a second preset key is received, the air conditioner is controlled to enter an exit stage of the preset operation mode. For example, when the user wants to temporarily exit the ice-melting mode, the user enters an exit stage of the preset operation mode by pressing the wind speed for more than 12 seconds, and then exits the preset operation mode.

For example, entering the third stage of smart deicing (the second sub-stage of the execution stage), the action is executed: the opening of the electronic expansion valve is forcibly controlled to ps2, low pressure is shielded (low pressure protection of a shielding system is used for avoiding entering a low pressure protection state), the target frequency of the compressor is set to ft2, the four-way valve is set to OFF, the inner fan is opened at a high wind gear, and the outer fan is set to OFF; when the compressor operation frequency reaches the target frequency ft2 and the time lasts for n4 time, or the time for entering the phase reaches n5 time, or the high pressure is greater than pd2, the second sub-phase of the execution phase is exited. Or when the user manually and forcibly exits, the second sub-stage is exited, and the exit stage of the preset operation mode is directly entered to exit the preset operation mode.

In a third sub-stage of the execution stage, the electronic expansion valve is controlled to be opened to a third preset opening degree ps3, the compressor is controlled to operate according to a third target frequency ft3, and the internal fan is controlled to operate at a first preset wind gear (for example, a high wind gear). The third sub-stage is a fourth stage of the preset operation mode. The second target frequency is less than the third target frequency; when the air conditioner meets a third preset exit condition, controlling the air conditioner to exit the third sub-stage and enter the exit stage; the third preset exit condition includes: and the time for entering the preset operation mode reaches n6 time, or the continuous time of the condenser outlet temperature for n7 is longer than a first temperature value, or the continuous time of the condenser outlet temperature for n8 is longer than a second temperature value, or the system high pressure is larger than a third preset pressure value pd3. The first temperature value is smaller than the second temperature value, n7 is larger than n8, and the situation that the execution stage can be quitted and the quitting stage can be entered as soon as possible when the rising speed of the cold-out temperature is high is avoided.

Optionally, in the third sub-stage, when the user manually and forcibly exits, the user exits the third sub-stage and enters the exiting stage of the preset operation mode. Specifically, when a second preset operation on a second preset key is received, the air conditioner is controlled to enter an exit stage of the preset operation mode. For example, when the user wants to temporarily exit the ice-melting mode, the user enters an exit stage of the preset operation mode if the user presses the wind speed for more than 12 seconds, and then exits the preset operation mode.

For example, entering the fourth phase of intelligent ice-melting (the third sub-phase of the execution phase), the action is executed: the opening of the electronic expansion valve is forcibly controlled to ps3, low pressure is shielded (low pressure protection of a shielding system is used for avoiding entering a low pressure protection state), the target frequency of the compressor is set to ft3, the four-way valve is set to OFF, the inner fan is opened to high grade, and the outer fan is set to OFF; when the intelligent ice melting time is more than or equal to n6, or the continuous n7 time meets the requirement that the cold-out temperature is more than Toc1, or the continuous n8 time meets the requirement that the cold-out temperature is more than Toc2, or the high voltage is more than pd3, the execution stage is exited; or when the user manually and forcibly quits, quitting the execution stage and directly entering the quitting stage of the preset operation mode.

And step S140, in the exit stage of the preset operation mode, controlling the electronic expansion valve to be opened to a fourth preset opening degree, controlling the compressor to operate in a frequency reduction mode at a fourth target frequency, and controlling the inner fan to operate at a first preset wind gear.

The exit stage is the fifth stage of the preset operation mode, and the compressor is controlled to perform frequency reduction operation at the fifth stage so as to exit the preset operation mode. Specifically, in the exit stage, the electronic expansion valve is controlled to be opened to a fourth preset opening degree, the compressor is controlled to operate in a frequency reduction mode at a fourth target frequency, and the inner fan is controlled to operate at a first preset wind gear. Wherein the fourth target frequency is less than or equal to the first target frequency. And when the air conditioner meets a fourth preset exit condition, exiting the exit stage of the preset operation mode. The fourth preset exit condition includes: the time of operating at the fourth target frequency ft4 reaches n9 time (that is, the time of operating at the fourth target frequency ft4 after the frequency of the compressor is increased to the fourth target frequency ft4 reaches n9 time), or the time of entering the exit stage reaches n10 time, or the operating frequency of the compressor is less than the fourth target frequency ft4, or the exhaust temperature of the compressor is greater than a preset exhaust temperature threshold Td1.

Optionally, in the exit stage of the preset operation mode, the low-voltage protection of the air conditioning system is shielded, so as to avoid the influence of the air conditioner entering the low-voltage protection on the ice melting process. The ice melting process is generally in a severe winter, the low-voltage protection value of the air conditioning system is shielded, so that the normal ice melting of the unit can not be influenced by the system when the system reaches the point for a short time, and the ice melting is quicker. Optionally, during the execution phase of the preset operation mode, the external fan keeps in an off state. Because a large amount of ice and snow are covered outside the room, the outer fan is in a closed state to ensure the ice melting effect, and the heat of the unit system is completely used for melting ice.

For example, enter the intelligent ice-melt fifth phase (exit phase), perform the actions: the opening of the electronic expansion valve is forcibly controlled to ps4, low pressure is shielded (low pressure protection of a shielding system is used for avoiding entering a low pressure protection state), the target frequency of the compressor is set to ft4, the four-way valve is set to OFF, and the inner fan is opened to high grade. This stage is exited when the compressor operating frequency reaches the target frequency ft4 for a time duration of n9, or the time to enter the stage reaches n10, or the compressor operating frequency < target frequency ft4, or the compressor discharge temperature > Td1.

Optionally, in an exit stage of the preset operation mode, when the system high pressure is greater than a fourth preset pressure value pd4, the outer fan is controlled to operate at a second preset gear, and until the system high pressure is less than a fifth preset pressure value pd5, the outer fan is controlled to be turned off. If the system high voltage rises too fast in the ice melting process, the direct system high voltage protection shutdown of the unit is caused, when the control high voltage is increased to reach a certain value, the external fan can be started in time to inhibit the high voltage protection shutdown, and the unit can be ensured to be normally shut down. For example, when the system high pressure is larger than pd4, the outer fan is switched on to the middle gear; when the system high voltage is less than pd5, the external fan is turned OFF.

Optionally, in an exit phase of the preset operation mode, when the air conditioner meets a fourth preset exit condition, controlling the setting components to be in corresponding second preset states respectively so as to enter a restart standby phase; and controlling the air conditioner to execute a heating mode after the time of entering the restart standby stage reaches a preset time. And controlling the setting parts to be in corresponding second preset states respectively, wherein the control of the electronic expansion valve to be closed, the compressor to be closed, the four-way valve to be closed, the inner fan to be closed and the outer fan to be closed is specifically included.

For example, when the air conditioner meets a fourth preset exit condition, exiting the exit stage of the preset operation mode, entering a restart standby state, setting the opening of the electronic expansion valve to be OFF, setting the compressor to be OFF, setting the four-way valve to be OFF, setting the inner fan to be OFF, setting the outer fan to be OFF, and restarting the standby whole stage for the longest time of n 11; and executing the control logic of the normal heating mode after exiting.

Optionally, after controlling the air conditioner to enter a preset operation mode, controlling a display panel of the air conditioner to display a corresponding mode icon and/or to exit a countdown of the preset operation mode. For example, after entering the preset operation mode, the display panel displays the inner ring temperature, the ice melting mark, and the windshield (displays the windshield before entering the preset operation mode). Meanwhile, after the countdown time is counted and the '000' is displayed, the standby restarting stage is entered, and the interface is recovered to be normal. Preferably, the mode icon is caused to blink. For example, the ice-melting identifier is made to flash to prompt the user that ice melting is being performed until the forced ice melting is finished.

In order to clearly illustrate the technical solution of the present invention, an execution flow of the control method of the vehicle air conditioner provided by the present invention is described below with an embodiment.

Fig. 2 is a schematic method diagram of a control method of an automotive air conditioner according to an embodiment of the present invention. As shown in fig. 2, a user powers on to start a heating mode, and within n1 seconds, presses the 'fresh air' for more than 12 seconds for a long time to enter a forced ice-melting mode, the display panel enters forced ice-melting, displays an ice-melting mark, and sends the forced ice-melting mark to the main control, and the main control can enter forced ice-melting after receiving the forced ice-melting mark sent by the display panel within n1 seconds of powering on. And detecting that the forced ice-melting mark is absent, and executing normal heating logic. And detecting that the one-key ice melting flag bit enters the first stage of intelligent ice melting.

And entering a first stage (entering stage) of intelligent ice melting, setting the frequency of a compressor to be OFF, setting an outer fan to be OFF, setting a four-way valve to be OFF, resetting the electronic expansion valve, and setting an inner fan to be OFF when the electronic expansion valve is detected to be completely reset.

Entering a second intelligent ice melting stage (a first execution stage sub-stage), and executing the actions of: opening degree is set to control ps1 strongly, low pressure is shielded, compressor frequency is set to ft1, four-way valve is OFF, inner fan is opened to high level, outer fan is OFF; exit Condition 1: the target frequency ft1 reaches n2 seconds or maximum n3 seconds (entering this stage reaches n3 seconds) or high voltage > pd1; exit Condition 2: manually and forcibly quitting; if the exit condition 1 is met, entering the third stage, and if the exit condition 2 is met, entering the fifth stage (namely, the exit stage);

entering a third intelligent ice melting stage (a second execution stage sub-stage), and executing the action: the opening is controlled by ps2, low voltage is shielded, frequency is set to ft2, a four-way valve is OFF, an inner fan is opened to high grade, and outer wind is OFF; exit Condition 1: target frequency ft2 reaches n4 seconds or maximum n5 seconds (entering this stage reaches n5 seconds) or high voltage > pd2; exit Condition 2: manually and forcibly quitting; if the exit condition 1 is met, entering the fourth stage, and if the exit condition 2 is met, entering the fifth stage (namely, the exit stage);

entering a fourth intelligent ice melting stage (a third execution stage sub-stage), and executing the actions of: the opening degree is controlled by ps3 strongly, low voltage is shielded, the frequency is set to ft3, the four-way valve is OFF, the inner fan is opened to high grade, and the outer fan is OFF; exit Condition 1: the intelligent ice melting time is more than or equal to n6 seconds, or the cold discharge is more than Toc1 for continuous n7 seconds, or the cold discharge is more than Toc2 for continuous n8 seconds, or the high voltage is more than pd3; exit Condition 2: manually and forcibly quitting; if the exit condition 1 is met or the exit condition 2 is met, entering a fifth stage (namely an exit stage);

entering a fifth intelligent ice melting stage (exit stage), and executing the actions of: the opening is controlled by ps4, low voltage is shielded, the frequency is set to ft4, the four-way valve is OFF, and the inner fan is opened to high grade. Controlling an outer fan: the system high pressure is larger than pd4, and the middle gear is opened; the system high voltage is less than pd5, and OFF is executed; and (3) exit conditions: the target frequency ft4 runs for n9 seconds, or runs for n10 seconds at the longest, or the running frequency is less than the target frequency ft4, or the exhaust temperature is more than Td1; if the exit condition is met, entering a restart standby stage;

entering into a restarting standby mode, setting the opening degree of the electronic expansion valve to be OFF, setting the frequency to be OFF, setting the four-way valve to be OFF, setting the inner fan to be OFF, setting the outer fan to be OFF, and setting the longest time n11 seconds in the whole stage of the restarting standby mode; and executing the control logic of the normal heating mode after exiting.

The preset opening degrees ps1, ps2, ps3, ps4 and the target frequencies ft1, ft2, ft3, ft4 of the compressor of the present invention may be set to reasonable values according to specific overall systems, such as the aperture of the electronic expansion valve and the displacement of the compressor, for example, the aperture of the electronic expansion valve for air distribution is 3.0mm, and then the opening degrees may be ps1=150B, ps2=300B, ps3=400B, and ps4=450B. The displacement of the compressor is 80ccc, then the frequency can be ft1=30HZ, ft2=60HZ, ft3=80HZ and ft4=40HZ, and the unit is ensured to meet the reliability requirement and the intelligent ice melting speed and ensure that ice melting is clean in the control process. The time value of n 1-n 10 can be obtained into a reasonable value through experiments or simulation.

Fig. 3 is a schematic structural diagram of an embodiment of a control device for an automotive air conditioner according to the present invention. As shown in fig. 3, the control device 100 includes a first control unit 110, a second control unit 120, a third control unit 130, and a fourth control unit 140.

The first control unit 110 is configured to, after the air conditioner is powered on to start the heating mode, control the air conditioner to enter a preset operation mode when a first preset operation on a first preset key is received within n1 time, so as to melt ice and snow on an outdoor heat exchanger and/or an external fan of the air conditioner.

The preset operation mode is used for melting ice and snow on the outdoor heat exchanger and/or the external fan of the air conditioner during operation. For example a forced ice-melt mode. For example, after a user powers on and starts a heating mode, within n1 seconds, if a 'fresh air' button is pressed for more than 12 seconds, the forced ice melting mode is entered. For example, when a user presses the 'new air' key for more than 12 seconds, the display panel sends the ice melting flag bit to the main control, and the main control receives the forced ice melting flag bit sent by the display panel within n1 seconds of power-on, so that forced ice melting can be performed.

Optionally, the apparatus further includes a display unit (not shown) for controlling a display panel of the air conditioner to display a corresponding mode icon and/or a countdown to exit the preset operation mode after the first control unit 110 controls the air conditioner to enter the preset operation mode. For example, the display panel is controlled to display an ice melting indicator to prompt the user that the ice melting mode is currently entered.

The second control unit 120 is configured to control setting components of the air conditioner to be in corresponding first preset states respectively at an entry stage of the preset operation mode, so that the air conditioner enters a cooling state; the setting means includes: the system comprises a compressor, an outer fan, a four-way valve, an electronic expansion valve and/or an inner fan.

The entering phase is a first phase of the preset operation mode, namely a preparation phase, and controls the setting part to be in a corresponding preparation state, namely a first preset state. The setting means includes: the system comprises a compressor, an outer fan, a four-way valve, an electronic expansion valve and/or an inner fan.

In one embodiment, the second control unit controls the setting components of the air conditioner to be in the corresponding first preset states respectively, and includes: controlling the compressor to be in a closed state, the outer fan to be in a closed state, the four-way valve to be in a closed state, the electronic expansion valve to perform reset operation, and the inner fan to be in a closed state; and when the electronic expansion valve is detected to be completely reset, controlling the inner fan to be in a closed state. For example, in the first stage of ice melting, the frequency of the compressor is set to OFF, the frequency of the external fan is set to OFF, the four-way valve is set to OFF, the electronic expansion valve performs a reset action (for example, 480B is opened first and 520B is closed again according to a set logic, so that the opening of the electronic expansion valve is reset to 0, which can ensure that the opening of the electronic expansion valve is 0), and when the completion of the reset of the electronic expansion valve is detected, the internal fan is set to OFF, that is, other loads of the unit are ensured to be in a closed state, and the reset of the electronic expansion valve is ensured. The electronic expansion valve is ensured to reset, and the opening given by the program can be ensured to be accurately executed.

The third control unit 130 is configured to control the opening of the electronic expansion valve and the up-conversion operation of the compressor according to different sub-stages at the execution stage of the preset operation mode, and control the inner fan to operate at a first preset wind gear.

Optionally, the third control unit 130 shields the low-voltage protection of the air conditioning system at the execution stage of the preset operation mode, so as to avoid the influence of the low-voltage protection on the ice melting process when the air conditioner enters the low-voltage protection, where the ice melting process is generally in a severe winter, and the shielding of the low-voltage protection value of the air conditioning system can effectively ensure that the normal ice melting of the unit is not influenced by the short time reaching of the low-voltage protection value, so that the ice melting is faster.

Optionally, the third control unit 130 is further configured to: and controlling the outer fan to keep a closed state at the execution stage of the preset operation mode. Because the outdoor side is covered by ice and snow, the outdoor fan is in a closed state in order to ensure the ice melting effect, and the heat of the unit system is completely used for melting ice.

Optionally, the third control unit 130 is further configured to: and in the execution stage of the preset operation mode, when a second preset operation on a second preset key is received, controlling the air conditioner to enter an exit stage of the preset operation mode.

In some embodiments, the execution phase includes a first sub-phase, a second sub-phase, and a third sub-phase. And respectively controlling the air conditioner to perform frequency-up operation at different target frequencies (a first target frequency, a second target frequency and a third target frequency, wherein the first target frequency is less than the second target frequency and less than the third target frequency) in the first sub-stage, the second sub-stage and the third sub-stage.

Specifically, the third control unit 130 controls the opening degree of the electronic expansion valve and the operations of the compressor and the inner fan according to different sub-stages at the execution stage of the preset operation mode, including: in a first sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a first preset opening degree ps1, controlling the compressor to operate according to a first target frequency ft1, and controlling the inner fan to operate at a first preset wind gear (for example, a high wind gear); the fourth target frequency is less than or equal to the first target frequency; when the air conditioner meets a first preset exit condition, the third control unit 130 controls the air conditioner to exit the first sub-stage and enter the second sub-stage; the first preset exit condition includes: the time of operating at the first target frequency ft1 reaches n2 time (that is, the time of operating at the first target frequency ft1 after the frequency of the compressor is increased to the first target frequency ft1 reaches n2 time), or the time of entering the first sub-stage reaches n3 time, or the system high pressure is greater than the first preset pressure value pd1.

Optionally, in the first sub-stage, when the user manually and forcibly exits, the third control unit 130 controls the air conditioner to exit the first sub-stage and enter the exiting stage of the preset operation mode. Specifically, when a second preset operation on a second preset key is received, the air conditioner is controlled to enter an exit stage of the preset operation mode. For example, when the user wants to temporarily exit the ice-melting mode, the user enters an exit stage of the preset operation mode by pressing the wind speed for more than 12 seconds, and then exits the preset operation mode.

For example, entering the second phase of smart ice melting (the first sub-phase of the execution phase), the actions are executed: the opening of the electronic expansion valve is forcibly controlled to ps1, low pressure is shielded (low pressure protection is carried out by a shielding system to avoid entering a low pressure protection state), the target frequency of the compressor is set to ft1, the four-way valve is OFF, the inner fan is opened at a high wind gear, and the outer fan is set to OFF; when the compressor operation frequency reaches the target frequency ft1 and the time lasts for n2 time, or the time of entering the phase reaches n3 time, or the high pressure is larger than pd1, the first sub-phase of the execution phase is exited. Or when the user manually and forcibly quits, quitting the first sub-stage, and directly entering a quitting stage of the preset operation mode to quit the preset operation mode.

In a second sub-stage of the execution stage, the third control unit 130 controls the electronic expansion valve to open to a second preset opening ps2, controls the compressor to operate according to a second target frequency ft2, and controls the internal fan to operate at a first preset wind gear (for example, a high wind gear); the first target frequency ft1 is smaller than the second target frequency ft2; when the air conditioner meets a second preset exit condition, the third control unit 130 controls the air conditioner to exit the second sub-stage and enter the third sub-stage; the second preset exit condition includes: the time of the operation at the second target frequency reaches n4 time (that is, the time of the operation at the second target frequency ft2 after the frequency of the compressor is increased to the second target frequency ft2 reaches n4 time), or the time of entering the second sub-stage reaches n5 time, or the system high pressure is greater than the second preset pressure value pd2.

Optionally, in the second sub-stage, when the user manually and forcibly exits, the user exits from the second sub-stage and enters into an exit stage of the preset operation mode. Specifically, when a second preset operation for a second preset key is received, the third control unit 130 controls the air conditioner to enter the exit stage of the preset operation mode. For example, when the user wants to temporarily exit the ice-melting mode, the user enters an exit stage of the preset operation mode if the user presses the wind speed for more than 12 seconds, and then exits the preset operation mode.

For example, entering the third stage of intelligent ice-melting (the second sub-stage of the execution stage), the action is executed: the opening of the electronic expansion valve is forcibly controlled to ps2, low pressure is shielded (low pressure protection is carried out by a shielding system to avoid entering a low pressure protection state), the target frequency of the compressor is set to ft2, the four-way valve is set to OFF, the inner fan is opened at a high wind gear, and the outer fan is set to OFF; when the compressor operation frequency reaches the target frequency ft2 and the time lasts for n4 time, or the time for entering the phase reaches n5 time, or the high pressure is greater than pd2, the second sub-phase of the execution phase is exited. Or when the user manually and forcibly quits, quitting the second sub-stage, and directly entering a quitting stage of the preset operation mode to quit the preset operation mode.

In a third sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a third preset opening degree ps3, controlling the compressor to operate according to a third target frequency ft3, and controlling the inner fan to operate at a first preset wind gear (for example, a high wind gear); the third sub-stage is a fourth stage of the preset operation mode. The second target frequency is less than the third target frequency; when the air conditioner meets a third preset exit condition, the third control unit 130 controls the air conditioner to exit the third sub-stage and enter the exit stage; the third preset exit condition includes: and the time for entering the preset operation mode reaches n6 time, or the continuous time of the condenser outlet temperature n7 is longer than a first temperature value, or the continuous time of the condenser outlet temperature n8 is longer than a second temperature value, or the system high pressure is larger than a third preset pressure value pd3. The first temperature value is smaller than the second temperature value, n7 is larger than n8, and the situation that the execution stage and the exit stage can be exited as soon as possible when the rising speed of the cold-out temperature is high is avoided.

Optionally, in the third sub-stage, when the user manually and forcibly exits, the third sub-stage is exited, and the exit stage of the preset operation mode is entered. Specifically, when a second preset operation for a second preset key is received, the third control unit 130 controls the air conditioner to enter the exit stage of the preset operation mode. For example, when the user wants to temporarily exit the ice-melting mode, the user enters an exit stage of the preset operation mode by pressing the wind speed for more than 12 seconds, and then exits the preset operation mode.

The fourth control unit 140 is configured to, at the exit stage of the preset operation mode, control the electronic expansion valve to be opened to a fourth preset opening degree, control the compressor to perform frequency reduction operation at a fourth target frequency, and control the inner fan to perform operation at a first preset wind gear.

The exit stage is the fifth stage of the preset operation mode, and the compressor is controlled to perform frequency reduction operation at the fifth stage so as to exit the preset operation mode. Specifically, in the exit stage, the electronic expansion valve is controlled to be opened to a fourth preset opening degree, the compressor is controlled to operate in a frequency reduction mode at a fourth target frequency, and the inner fan is controlled to operate at a first preset wind gear.

Wherein the fourth target frequency is less than or equal to the first target frequency. And when the air conditioner meets a fourth preset exit condition, exiting the exit stage of the preset operation mode. The fourth preset exit condition includes: the time for operating at the fourth target frequency ft4 reaches n9 time (that is, the time for operating at the fourth target frequency ft4 after the frequency of the compressor is raised to the fourth target frequency ft4 reaches n9 time), or the time for entering the exit stage reaches n10 time, or the operating frequency of the compressor is less than the fourth target frequency ft4, or the discharge temperature of the compressor is greater than the preset discharge temperature threshold Td1.

Optionally, the fourth control unit 140 is further configured to: and shielding the low-voltage protection of the air conditioning system at the exit stage of the preset operation mode so as to avoid the influence of the low-voltage protection on the ice melting process when the air conditioner enters the low-voltage protection. The ice melting process is generally in a severe winter, the low-voltage protection value of the air conditioning system is shielded, so that the normal ice melting of the unit can not be influenced by the system when the system reaches the point for a short time, and the ice melting is quicker.

Optionally, the fourth control unit 140 is further configured to: controlling the outer fan to keep a closing state at the exit stage of the preset operation mode; because a large amount of ice and snow are covered outside the room, the outer fan is in a closed state to ensure the ice melting effect, and the heat of the unit system is completely used for melting ice.

Optionally, the fourth control unit 140 is further configured to: and at the exit stage of the preset operation mode, when the system high pressure is greater than a fourth preset pressure value pd4, controlling the outer fan to operate at a second preset wind gear, and controlling the outer fan to be closed until the system high pressure is less than a fifth preset pressure value pd 5. If the system high voltage rises too fast in the ice melting process, the direct system high voltage protection shutdown of the unit is caused, when the control high voltage is increased to reach a certain value, the external fan can be started in time to inhibit the high voltage protection shutdown, and the unit can be ensured to be normally shut down. For example, when the system high pressure is greater than pd4, the outer fan is in the middle gear; when the system high voltage is less than pd5, the external fan is turned OFF.

Optionally, the apparatus further includes a fifth control unit and a sixth control unit (not shown), where the fifth control unit is configured to, in an exit phase of the preset operation mode, control the setting components to be in corresponding second preset states respectively to enter a restart standby phase when the air conditioner meets a fourth preset exit condition; the sixth control unit is used for controlling the air conditioner to execute a heating mode after the time for entering the restart standby stage reaches a preset time length; and controlling the setting parts to be in corresponding second preset states respectively, wherein the control of the electronic expansion valve, the compressor, the four-way valve, the inner fan and the outer fan is specifically performed.

For example, when the air conditioner meets a fourth preset exit condition, the air conditioner exits the exit stage of the preset running mode and enters a restarting standby state, the opening degree of an electronic expansion valve is set to be OFF, a compressor is set to be OFF, a four-way valve is set to be OFF, an inner fan is set to be OFF, an outer fan is set to be OFF, and the whole restarting standby stage has the longest time of n 11; and executing a normal heating mode control logic after exiting.

Optionally, the apparatus 100 further comprises: and a display unit (not shown) for controlling a display panel of the air conditioner to display a corresponding mode icon and/or to exit a countdown of the preset operation mode after the first control unit controls the air conditioner to enter the preset operation mode. For example, after entering the preset operation mode, the display panel displays the inner ring temperature, the ice melting mark, and the windshield (displays the windshield before entering the preset operation mode). Meanwhile, after the countdown time is counted and the '000' is displayed, the standby restarting stage is entered, and the interface is recovered to be normal. Preferably, the mode icon is caused to blink. For example, the ice-melting identifier is made to flash to prompt the user that ice melting is being performed until the forced ice melting is finished.

The present invention also provides a storage medium corresponding to the control method of the vehicle air conditioner, on which a computer program is stored, which when executed by a processor implements the steps of any of the aforementioned methods.

The invention also provides a vehicle air conditioner corresponding to the control method of the vehicle air conditioner, which comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of any one of the methods when executing the program.

The invention also provides a vehicle air conditioner corresponding to the control device of the vehicle air conditioner, which comprises the control device of the vehicle air conditioner.

Therefore, the scheme provided by the invention intelligently sets the ice melting exit condition, and ensures that ice melting is clean; conditions of different ice melting stages are reasonably set, and the reliability of the air conditioning system is accurately controlled and improved.

According to the technical scheme of the invention, snow or ice blocks covered on the outdoor heat exchanger are melted by entering the refrigeration cycle through one key, and the snow or ice blocks on the external fan are continuously melted by heat generated by the heat exchanger. One-key intelligent ice melting logic control abandons the operation risk caused by the traditional manual defrosting of getting on the bus, greatly improves ice melting efficiency, improves ice melting efficiency by more than 70 percent through comparison, and reduces the boarding risk to 0.

According to the technical scheme of the invention, whether the accumulated snow on the roof or ice blocks melt is continuously checked in multiple stages, and finally the ice melting effect is strictly controlled, so that the condition of incomplete ice melting or poor ice melting effect is avoided.

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts serving as control devices may or may not be physical units, may be located in one place, or may be distributed on multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A control method of an air conditioner for a vehicle, characterized by comprising:

after the air conditioner is powered on and a heating mode is started, when a first preset operation of a first preset key is received within n1 time, the air conditioner is controlled to enter a preset operation mode so as to melt ice and snow on an outdoor heat exchanger and/or an external fan of the air conditioner;

at the entering stage of the preset operation mode, controlling the setting parts of the air conditioner to be in corresponding first preset states respectively so as to enable the air conditioner to enter a refrigeration state; the setting member includes: the system comprises a compressor, an outer fan, a four-way valve, an electronic expansion valve and/or an inner fan;

at the execution stage of the preset operation mode, controlling the opening of the electronic expansion valve and the ascending frequency operation of the compressor according to different sub-stages, and controlling the inner fan to operate at a first preset wind gear; the execution phase comprises a first sub-phase, a second sub-phase and a third sub-phase; respectively controlling the air conditioner to perform frequency-up operation at different target frequencies in the first sub-stage, the second sub-stage and the third sub-stage;

at the exit stage of the preset operation mode, controlling the electronic expansion valve to be opened to a fourth preset opening degree, controlling the compressor to operate in a frequency reduction mode at a fourth target frequency, and controlling the inner fan to operate at a first preset wind gear;

in the execution stage of the preset operation mode, controlling the opening degree of the electronic expansion valve and the operation of the compressor and the inner fan according to different sub-stages, including:

in a first sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a first preset opening degree, controlling the compressor to operate according to a first target frequency, and controlling the inner fan to operate at a first preset wind gear; the fourth target frequency is less than or equal to the first target frequency; when the air conditioner meets a first preset exit condition, controlling the air conditioner to exit the first sub-stage and enter the second sub-stage;

and/or the presence of a gas in the gas,

in a second sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a second preset opening degree, controlling the compressor to operate according to a second target frequency, and controlling the inner fan to operate at a first preset wind gear; the first target frequency is less than the second target frequency; when the air conditioner meets a second preset exit condition, controlling the air conditioner to exit the second sub-stage and enter a third sub-stage;

and/or the presence of a gas in the atmosphere,

in a third sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a third preset opening degree, controlling the compressor to operate according to a third target frequency, and controlling the inner fan to operate at a first preset wind gear; the second target frequency is less than the third target frequency; and when the air conditioner meets a third preset exit condition, controlling the air conditioner to exit the third sub-stage and enter the exit stage.

2. The method of claim 1,

the first preset exit condition includes: the time of running at the first target frequency reaches n2 time, or the time of entering the first sub-stage reaches n3 time, or the high pressure of the system is greater than a first preset pressure value;

and/or the presence of a gas in the gas,

the second preset exit condition includes: the time of running at a second target frequency reaches n4 time, or the time of entering the second sub-stage reaches n5 time, or the high pressure of the system is greater than a second preset pressure value;

and/or the presence of a gas in the gas,

the third preset exit condition includes: and the time for entering the preset operation mode reaches n6 time, or the continuous time of the condenser outlet temperature for n7 is longer than a first temperature value, or the continuous time of the condenser outlet temperature for n8 is longer than a second temperature value, or the system high pressure is larger than a third preset pressure value.

3. The method of claim 1 or 2, further comprising:

in the exit stage of the preset operation mode, when the air conditioner meets a fourth preset exit condition, controlling the setting components to be in corresponding second preset states respectively so as to enter a restart standby stage;

after the time of entering the restart standby stage reaches a preset time, controlling the air conditioner to execute a heating mode;

the fourth preset exit condition includes: and the time of running at the fourth target frequency reaches n9 time, or the time of entering the exit stage reaches n10 time, or the running frequency of the compressor is less than the fourth target frequency, or the exhaust temperature of the compressor is greater than a preset exhaust temperature threshold.

4. The method according to claim 1 or 2, wherein controlling the setting components of the air conditioner to be in the respective first preset states comprises:

controlling the compressor to be in a closed state, the outer fan to be in a closed state, the four-way valve to be in a closed state, the electronic expansion valve to perform reset operation, and the inner fan to be in a closed state; when the electronic expansion valve is detected to be completely reset, the inner fan is controlled to be in a closed state.

5. The method of claim 1 or 2, further comprising:

shielding low-voltage protection of the air conditioning system at the execution stage and/or the exit stage of the preset operation mode;

and/or the presence of a gas in the gas,

in the execution stage and/or the exit stage of the preset operation mode, the external fan keeps a closed state;

and/or the presence of a gas in the gas,

and in the exit stage of the preset operation mode, when the system high pressure is greater than a fourth preset pressure value, controlling the outer fan to operate at a second preset wind gear, and controlling the outer fan to be closed until the system high pressure is less than a fifth preset pressure value.

6. The method of claim 1 or 2, further comprising:

after controlling the air conditioner to enter a preset operation mode, controlling a display panel of the air conditioner to display a corresponding mode icon and/or quit the countdown of the preset operation mode;

and/or the presence of a gas in the gas,

and in the execution stage of the preset operation mode, when a second preset operation on a second preset key is received, controlling the air conditioner to enter an exit stage of the preset operation mode.

7. A control device of an air conditioner for a vehicle, comprising:

the first control unit is used for controlling the air conditioner to enter a preset operation mode to melt ice and snow on an outdoor heat exchanger and/or an external fan of the air conditioner when a first preset operation of a first preset key is received within n1 time after the heating mode is started on the air conditioner;

the second control unit is used for controlling the setting parts of the air conditioner to be in corresponding first preset states respectively at the entering stage of the preset operation mode so as to enable the air conditioner to enter a refrigeration state; the setting means includes: the system comprises a compressor, an outer fan, a four-way valve, an electronic expansion valve and/or an inner fan;

the third control unit is used for controlling the opening of the electronic expansion valve and the up-conversion operation of the compressor according to different sub-stages and controlling the inner fan to operate at a first preset wind gear in the execution stage of the preset operation mode; the execution phase comprises a first sub-phase, a second sub-phase and a third sub-phase; respectively controlling the air conditioner to perform frequency-up operation at different target frequencies in the first sub-stage, the second sub-stage and the third sub-stage;

the fourth control unit is used for controlling the electronic expansion valve to be opened to a fourth preset opening degree and controlling the compressor to operate in a frequency reduction mode at a fourth target frequency and controlling the inner fan to operate at a first preset wind gear at the exit stage of the preset operation mode;

the third control unit, at the execution stage of the preset operation mode, controls the opening degree of the electronic expansion valve and the operation of the compressor and the internal fan according to different sub-stages, and includes:

and/or the presence of a gas in the atmosphere,

8. The apparatus of claim 7, wherein the execution phase comprises a first sub-phase, a second sub-phase, and a third sub-phase;

the third control unit, at the execution stage of the preset operation mode, controls the opening degree of the electronic expansion valve and the operation of the compressor and the inner fan according to different sub-stages, and includes:

in a first sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a first preset opening degree, controlling the compressor to operate according to a first target frequency, and controlling the inner fan to operate at a first preset wind gear; the fourth target frequency is less than or equal to the first target frequency;

when the air conditioner meets a first preset exit condition, controlling the air conditioner to exit the first sub-stage and enter the second sub-stage; the first preset exit condition includes: the time of running at the first target frequency reaches n2 time, or the time of entering the first sub-stage reaches n3 time, or the high pressure of the system is greater than a first preset pressure value;

and/or the presence of a gas in the atmosphere,

in a second sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a second preset opening degree, controlling the compressor to operate according to a second target frequency, and controlling the inner fan to operate at a first preset wind gear; the first target frequency is less than the second target frequency;

when the air conditioner meets a second preset exit condition, controlling the air conditioner to exit the second sub-stage and enter the third sub-stage; the second preset exit condition includes: the time of running at a second target frequency reaches n4 time, or the time of entering the second sub-stage reaches n5 time, or the high pressure of the system is greater than a second preset pressure value;

and/or the presence of a gas in the atmosphere,

in a third sub-stage of the execution stage, controlling the electronic expansion valve to be opened to a third preset opening degree, controlling the compressor to operate according to a third target frequency, and controlling the inner fan to operate at a first preset wind gear; the second target frequency is less than the third target frequency;

when the air conditioner meets a third preset exit condition, controlling the air conditioner to exit the third sub-stage and enter the exit stage; the third preset exit condition includes: and the time for entering the preset operation mode reaches n6 time, or the continuous time of the condenser outlet temperature for n7 is longer than a first temperature value, or the continuous time of the condenser outlet temperature for n8 is longer than a second temperature value, or the system high pressure is larger than a third preset pressure value.

9. The apparatus of claim 7 or 8, further comprising:

the fifth control unit is used for controlling the setting components to be in corresponding second preset states respectively so as to enter a restarting standby stage when the air conditioner meets a fourth preset exit condition in an exit stage of the preset operation mode;

the sixth control unit is used for controlling the air conditioner to execute a heating mode after the time for entering the restart standby stage reaches a preset time length;

the fourth preset exit condition includes: and the time of running at a fourth target frequency reaches n9 time, or the time of entering the exit stage reaches n10 time, or the running frequency of the compressor is less than the fourth target frequency, or the exhaust temperature of the compressor is greater than a preset exhaust temperature threshold.

10. The apparatus of claim 7 or 8, wherein the second control unit controls the setting parts of the air conditioner to be in the corresponding first preset states respectively, and comprises:

11. The apparatus according to claim 7 or 8,

the third control unit is further configured to: shielding low-voltage protection of the air conditioning system at the execution stage of the preset operation mode; and/or the fourth control unit is further configured to: shielding low-voltage protection of the air conditioning system at the exit stage of the preset operation mode;

and/or the presence of a gas in the gas,

the third control unit is further configured to: controlling the outer fan to keep a closing state at the execution stage of the preset operation mode; and/or the fourth control unit is further configured to: controlling the outer fan to keep a closing state at the exit stage of the preset operation mode;

and/or the presence of a gas in the atmosphere,

the fourth control unit is further configured to: and in the exit stage of the preset operation mode, when the system high pressure is greater than a fourth preset pressure value, controlling the outer fan to operate at a second preset wind gear, and controlling the outer fan to be closed until the system high pressure is less than a fifth preset pressure value.

12. The apparatus of claim 7 or 8, further comprising:

the display unit is used for controlling a display panel of the air conditioner to display a corresponding mode icon and/or quit countdown of the preset operation mode after the first control unit controls the air conditioner to enter the preset operation mode;

and/or the presence of a gas in the gas,

the third control unit is further configured to: and in the execution stage of the preset operation mode, when a second preset operation on a second preset key is received, controlling the air conditioner to enter an exit stage of the preset operation mode.

13. A storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.

14. A vehicle air conditioner, comprising a processor, a memory, and a computer program stored in the memory and operable on the processor, wherein the processor executes the program to perform the steps of the method according to any one of claims 1 to 6, and wherein the control device of the vehicle air conditioner according to any one of claims 7 to 12 is included.