CN116007131A

CN116007131A - Air conditioner and self-cleaning control method thereof

Info

Publication number: CN116007131A
Application number: CN202211520667.5A
Authority: CN
Inventors: 朱磊; 彭琪; 邹海如; 王新民
Original assignee: Hisense Guangdong Air Conditioning Co Ltd
Current assignee: Hisense Guangdong Air Conditioning Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-25

Abstract

The invention discloses an air conditioner and a self-cleaning control method thereof, wherein an indoor temperature detection device is arranged indoors to adjust the operation parameters of the air conditioner according to the detected indoor environment temperature when the air conditioner enters a self-cleaning mode, so that user uncomfortable feeling caused by overlarge indoor environment temperature change in the self-cleaning process is avoided, and user experience feeling is improved.

Description

Air conditioner and self-cleaning control method thereof

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner and a self-cleaning control method thereof.

Background

In the operation process of the air conditioner, air is sucked into the air conditioner shell from the air inlet under the action of the fan, after heat exchange is carried out with the heat exchanger, the temperature rises or falls, and then the air is discharged from the air outlet.

In the prior art, in order to solve the problem of dust accumulation of a heat exchanger, a self-cleaning technical scheme is provided, namely a self-cleaning function is started, an air conditioner firstly forms frost on the surface of the heat exchanger to be cleaned in a freezing stage and then converts the frost into a defrosting stage, the frost formed on the surface of the heat exchanger to be cleaned is thawed into water, and the water flows downwards along the fins of the heat exchanger, so that dust on the heat exchanger to be cleaned is taken away, and the heat exchanger to be cleaned is cleaned. However, in the existing self-cleaning technology, when the controller receives a self-cleaning instruction, the self-cleaning action is executed according to a set program, and the discomfort brought to a user due to the change of the indoor environment temperature in the self-cleaning process is not considered, so that the user experience is reduced.

Disclosure of Invention

The embodiment of the invention aims to provide an air conditioner and a self-cleaning control method thereof, which can be used for adjusting the operation parameters of the air conditioner according to the indoor environment temperature in the self-cleaning process, avoiding uncomfortable feeling of a user caused by the indoor environment temperature in the self-cleaning process and improving the user experience.

To achieve the above object, an embodiment of the present invention provides an air conditioner, including:

a refrigerant circuit that circulates a refrigerant through a compressor, a condenser, a pressure reducer, and an evaporator in this order; one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger;

the indoor temperature detection device is arranged indoors and is used for detecting indoor environment temperature;

a controller configured to:

controlling the air conditioner to enter a self-cleaning mode, so that the heat exchanger to be cleaned functions as an evaporator to perform freezing treatment; wherein the heat exchanger to be cleaned is the outdoor heat exchanger or the indoor heat exchanger;

and adjusting the operation parameters of the air conditioner according to the indoor environment temperature.

As an improvement of the above, the controller is further configured to:

when the indoor environment temperature is in a preset low-temperature interval, controlling the air conditioner to switch from the self-cleaning mode to a heating mode;

If the indoor environment temperature is detected to reach a preset target temperature in a preset heating period after the air conditioner enters the heating mode, controlling the air conditioner to switch back to the self-cleaning mode from the heating mode; wherein the preset target temperature is greater than the maximum value of the preset low temperature interval;

and under the heating mode, when the indoor environment temperature does not reach the preset target temperature and the current time exceeds the preset heating period, controlling the air conditioner to switch back to the self-cleaning mode from the heating mode, so that the air conditioner executes self-cleaning until the self-cleaning is finished.

As an improvement of the above-mentioned scheme, the preset low temperature section includes a first preset low temperature section and a second preset low temperature section, and a maximum value of the first preset low temperature section is smaller than a minimum value of the second preset low temperature section; the preset target temperature at least comprises a low suitable temperature and an ideal temperature, wherein the low suitable temperature is smaller than the ideal temperature, and the low suitable temperature is larger than the maximum value of the second preset low temperature interval; the preset heating time period comprises a first heating time period and a second heating time period; the preset target temperature corresponding to the first preset low temperature interval is the low suitable temperature, the preset target temperature corresponding to the second preset low temperature interval is the ideal temperature, the preset heating period corresponding to the first preset low temperature interval is the first heating period, and the preset heating period corresponding to the second preset low temperature interval is the second heating period.

As an improvement of the above, the controller is further configured to:

when the indoor environment temperature is in a preset high-temperature interval, controlling the air conditioner to switch from the self-cleaning mode to a refrigeration mode;

in a preset refrigerating period after the air conditioner enters the refrigerating mode, if the indoor environment temperature is detected to reach a preset target temperature, controlling the air conditioner to switch back to the self-cleaning mode from the refrigerating mode; wherein the preset target temperature is less than the minimum value of the preset high temperature interval;

and in the refrigerating mode, when the indoor environment temperature does not reach the preset target temperature and the current time exceeds the preset refrigerating period, controlling the air conditioner to switch back to the self-cleaning mode from the refrigerating mode, so that the air conditioner executes self-cleaning until the air conditioner is finished.

As an improvement of the above scheme, the preset high temperature section includes a first preset high temperature section and a second preset high temperature section, and a maximum value of the first preset high temperature section is smaller than a minimum value of the second preset high temperature section; the preset target temperature at least comprises a high suitable temperature and an ideal temperature, wherein the high suitable temperature is larger than the ideal temperature, and the high suitable temperature is smaller than the minimum value of the first preset high temperature interval; the preset refrigerating time period comprises a first refrigerating time period and a second refrigerating time period; the preset target temperature corresponding to the first preset high temperature interval is the ideal temperature, the preset target temperature corresponding to the second preset high temperature interval is the high proper temperature, the preset refrigeration period corresponding to the first preset high temperature interval is the first refrigeration period, and the preset refrigeration period corresponding to the second preset high temperature interval is the second refrigeration period.

As an improvement of the above, the controller is further configured to:

when the heat exchanger to be cleaned is an indoor heat exchanger, if the indoor fan at the previous moment when the air conditioner is switched back to the self-cleaning mode is in an operating state, controlling the indoor fan to continue to operate for a preset operation duration;

when the heat exchanger to be cleaned is an indoor heat exchanger, if the previous moment when the air conditioner is switched back to the self-cleaning mode is in a stop state, controlling the air conditioner to keep the stop state for a preset stop time period, and controlling the indoor heat exchanger to freeze for a preset freezing time period after the preset stop time period;

and controlling the indoor fan to run in the freezing treatment process of the preset freezing time.

As an improvement of the above, the controller is further configured to:

when the freezing treatment is finished, controlling the air conditioner to enter a defrosting stage of the heat exchanger to be cleaned, so that the heat exchanger to be cleaned functions as a condenser to enable the heat exchanger to be cleaned to perform defrosting treatment; the pressure reducer is an expansion valve, and the opening of the expansion valve under defrosting treatment is smaller than or equal to the opening of the expansion valve under freezing treatment.

As an improvement of the above, the controller is further configured to:

before the air conditioner is controlled to switch between the heating mode and the self-cleaning mode of the indoor heat exchanger, the air conditioner is controlled to be stopped for a preset stop time period;

before the air conditioner is controlled to switch between the refrigerating mode and the self-cleaning mode of the outdoor heat exchanger, the air conditioner is controlled to stop for a preset stop time period; wherein the self-cleaning mode includes the indoor heat exchanger self-cleaning mode and the outdoor heat exchanger self-cleaning mode.

In order to achieve the above object, the embodiment of the present invention further provides a self-cleaning control method for an air conditioner, including:

controlling an air conditioner to enter a self-cleaning mode, and enabling a heat exchanger to be cleaned to function as an evaporator so as to enable the heat exchanger to be cleaned to be frozen; wherein the heat exchanger to be cleaned is the outdoor heat exchanger or the indoor heat exchanger;

and adjusting the operation parameters of the air conditioner according to the acquired indoor environment temperature.

As an improvement of the above solution, the adjusting the operation parameter of the air conditioner according to the obtained indoor environment temperature includes:

Compared with the prior art, the air conditioner and the self-cleaning control method thereof disclosed by the embodiment of the invention have the advantages that the indoor temperature detection device is arranged indoors to adjust the operation parameters of the air conditioner according to the detected indoor environment temperature when the air conditioner enters the self-cleaning mode, so that user uncomfortable feeling caused by overlarge indoor environment temperature change in the self-cleaning process is avoided, and the user experience is improved.

Drawings

Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a refrigeration system of an air conditioner according to an embodiment of the present invention;

FIG. 3 is a first workflow diagram of a controller provided by an embodiment of the present invention;

fig. 4 is a block diagram of an air conditioner according to an embodiment of the present invention;

fig. 5 is a block diagram of a communication system according to an embodiment of the present invention;

FIG. 6 is a second workflow diagram of a controller provided by an embodiment of the present invention;

FIG. 7 is a third workflow diagram of a controller provided by an embodiment of the present invention;

fig. 8 is a four-dimensional schematic diagram of a communication system according to an embodiment of the present invention;

fig. 9 is a schematic flow diagram of a refrigerant in a cooling mode according to an embodiment of the present invention;

fig. 10 is a schematic flow diagram of a refrigerant in a heating mode according to an embodiment of the present invention;

fig. 11 is a flow chart of a refrigerant anomaly monitoring method according to an embodiment of the present invention.

100 parts of indoor units; 101. a cleaning button; 200. an outdoor unit; 300. a controller; 301. a wire controller; 302. a remote controller; 10. a compressor; 20. a condenser; 30. a pressure reducer; 40. an evaporator; 1. an indoor heat exchanger; 2. an outdoor heat exchanger; 3. and a four-way valve.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1, the air conditioner according to the embodiment of the present invention includes an indoor unit 100 and an outdoor unit 200, the indoor unit 100 is used for adjusting the temperature and humidity of indoor air, the outdoor unit 200 is connected to the indoor unit 100 through a connection pipe, the outdoor unit 200 is installed outdoors, and the indoor unit 100 is installed indoors.

The air conditioner is provided with a refrigerant circuit, specifically, the refrigerant circuit circulates a refrigerant through a compressor, a condenser, a reducer and an evaporator in sequence; one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger.

The heat exchange principle in the refrigerant circuit is as follows:

referring to the structural schematic diagram of the refrigerating system of the air conditioner shown in fig. 2, the refrigerating system includes a compressor 10, a condenser 20, a pressure reducer 30, and an evaporator 40, forming a refrigerant circuit, the refrigerant cycle including a series of processes involving compression, condensation, expansion, and evaporation, and supplying a refrigerant to air that has been conditioned and heat-exchanged, the compressor 10 compressing a refrigerant gas in a high-temperature and high-pressure state and discharging the compressed refrigerant gas, the discharged refrigerant gas flowing into the condenser 20, the condenser 20 condensing the compressed refrigerant into a liquid phase, and heat being released to the surrounding environment through the condensation process. The pressure reducer 30 expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser 20 into a low-pressure liquid-phase refrigerant. The evaporator 40 evaporates the refrigerant expanded in the pressure reducer and returns the refrigerant gas in a low temperature and low pressure state to the compressor 10. The evaporator 40 may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant.

The air conditioner may adjust the temperature of the indoor space throughout the cycle. The outdoor unit 200 of the air conditioner refers to a portion of the refrigeration cycle including the compressor 10 and the outdoor heat exchanger, the indoor unit 100 of the air conditioner includes the indoor heat exchanger, and the pressure reducer 30 may be provided in the indoor unit 100 or the outdoor unit 200. The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is a heater for heating, and when the indoor heat exchanger is used as an evaporator, the air conditioner is a cooler for cooling.

It should be noted that, the air conditioner according to the embodiment of the present invention is not limited to the specific split type air conditioner, but may be an integrated type air conditioner, such as a window type air conditioner, and the specific type of the air conditioner is not limited herein.

The air conditioner further comprises an indoor temperature detection device which is arranged indoors and used for detecting indoor environment temperature.

Further, the indoor temperature detection device can be a temperature sensor, the temperature sensor can sense temperature and convert the temperature into a usable output signal, the temperature sensor can be divided into two main types of contact type and non-contact type according to a measurement mode, the temperature sensor can be divided into two types of thermal resistors and thermocouples according to the characteristics of sensor materials and electronic elements, and manufacturers can select specific types of temperature sensors according to actual application requirements.

It should be noted that, the specific installation position of the indoor temperature detecting device in the indoor space may be set according to actual requirements, which is not limited herein.

Specifically, the air conditioner further includes a controller, and in an embodiment of the present invention, the controller is configured to: controlling the air conditioner to enter a self-cleaning mode, so that the heat exchanger to be cleaned functions as an evaporator to perform freezing treatment; wherein the heat exchanger to be cleaned is the outdoor heat exchanger or the indoor heat exchanger; and adjusting the operation parameters of the air conditioner according to the indoor environment temperature.

Referring to fig. 3, fig. 3 is a first workflow diagram of a controller according to an embodiment of the present invention, where the controller is configured to perform steps S11 to S12:

s11, responding to a self-cleaning instruction, controlling the air conditioner to enter a self-cleaning mode, and enabling the heat exchanger to be cleaned to function as an evaporator so as to perform freezing treatment; wherein the heat exchanger to be cleaned is the outdoor heat exchanger or the indoor heat exchanger;

it should be noted that, referring to fig. 4 and fig. 5, fig. 4 is a structural diagram of an air conditioner provided by an embodiment of the present invention, fig. 5 is a structural diagram of a communication system provided by an embodiment of the present invention, a self-cleaning instruction is an indoor heat exchanger self-cleaning instruction or an outdoor heat exchanger self-cleaning instruction, a cleaning button 101 may be set on the air conditioner, a self-cleaning instruction may be input by a user through the button, a self-cleaning instruction may also be input by a user through a line controller 301 or a remote controller 302, a self-cleaning instruction may also be triggered by preset setting timing to implement a timing self-cleaning function of the air conditioner, and the triggering of the self-cleaning instruction is not limited herein.

Specifically, the self-cleaning instruction comprises an indoor heat exchanger self-cleaning instruction and an outdoor heat exchanger self-cleaning instruction, when the self-cleaning instruction is the indoor heat exchanger self-cleaning instruction, the indoor heat exchanger is self-cleaned, and the indoor heat exchanger firstly acts as an evaporator to perform freezing treatment so as to frost the surface of the indoor heat exchanger; when the self-cleaning instruction is an outdoor heat exchanger self-cleaning instruction, the outdoor heat exchanger is self-cleaned, and the outdoor heat exchanger firstly functions as an evaporator to perform freezing treatment, so that the surface of the outdoor heat exchanger is frosted.

S12, adjusting the operation parameters of the air conditioner according to the indoor environment temperature.

Specifically, the self-cleaning mode comprises a freezing stage and a defrosting stage, when the air conditioner enters the self-cleaning mode to operate for a period of time, the system stably operates and is in the freezing stage, the operation parameters of the air conditioner are adjusted according to the indoor environment temperature obtained through monitoring, user discomfort caused by overlarge indoor environment temperature change is avoided, and user experience is improved.

Specifically, in a preferred embodiment, the controller is further configured to: when the indoor environment temperature is in a preset low-temperature interval, controlling the air conditioner to switch from the self-cleaning mode to a heating mode; if the indoor environment temperature is detected to reach a preset target temperature in a preset heating period after the air conditioner enters the heating mode, controlling the air conditioner to switch back to the self-cleaning mode from the heating mode; wherein the preset target temperature is greater than the maximum value of the preset low temperature interval; and under the heating mode, when the indoor environment temperature does not reach the preset target temperature and the current time exceeds the preset heating period, controlling the air conditioner to switch back to the self-cleaning mode from the heating mode, so that the air conditioner executes self-cleaning until the self-cleaning is finished.

Specifically, in the specific embodiment of the invention, the operation parameter of the air conditioner is adjusted according to the indoor environment temperature, specifically, the air conditioner is controlled to switch between a heating mode and a self-cleaning mode according to the indoor environment temperature. Specifically, considering the situation that the indoor environment temperature is low, when the indoor environment temperature is in a preset low-temperature zone, the explanation temperature is low, and the user comfort level is poor, so that the air conditioner is switched from the self-cleaning mode to the heating mode, the indoor environment temperature is improved, and the indoor environment temperature is raised to a comfortable temperature zone of the user. Further, in order to give consideration to user comfort and self-cleaning efficiency, a preset heating period is set, namely, when the air conditioner is switched to a heating mode, the air conditioner enters the preset heating period, if the indoor environment temperature is detected to rise to a preset target temperature in the period, the heating effect is good, and the temperature which is more comfortable for a user is reached, at the moment, the air conditioner can be switched back to the self-cleaning mode from the heating mode to continue to execute self-cleaning, and after the air conditioner is switched back to the self-cleaning mode, the indoor environment temperature is still monitored to ensure that the air conditioner is switched to the heating mode when the temperature is low; if the indoor environment temperature still does not reach the preset target temperature after the preset heating period is finished, the heating effect is not obvious, if the heating mode is kept, the indoor environment temperature rising effect is poor, and the self-cleaning period is prolonged, so that in the case, in order to ensure the self-cleaning efficiency, after the preset heating period is finished, the air conditioner is switched back to the self-cleaning mode from the heating mode, and in the self-cleaning of the round, the mode is not switched according to the indoor environment temperature any more, and the self-cleaning task is directly executed until the self-cleaning is finished.

Specifically, in a preferred embodiment, the preset low temperature interval includes a first preset low temperature interval and a second preset low temperature interval, and a maximum value of the first preset low temperature interval is smaller than a minimum value of the second preset low temperature interval; the preset target temperature at least comprises a low suitable temperature and an ideal temperature, wherein the low suitable temperature is smaller than the ideal temperature, and the low suitable temperature is larger than the maximum value of the second preset low temperature interval; the preset heating time period comprises a first heating time period and a second heating time period; the preset target temperature corresponding to the first preset low temperature interval is the low suitable temperature, the preset target temperature corresponding to the second preset low temperature interval is the ideal temperature, the preset heating period corresponding to the first preset low temperature interval is the first heating period, and the preset heating period corresponding to the second preset low temperature interval is the second heating period.

Specifically, in order to more accurately consider self-cleaning efficiency and user experience, the preset low temperature interval is divided into a first preset low temperature interval and a second preset low temperature interval, and the maximum temperature of the first preset low temperature interval is smaller than the minimum value of the second preset low temperature interval.

When the air conditioner is stably operated in the self-cleaning mode, if the indoor environment temperature is detected to fall in a first preset low-temperature interval, the temperature is lower at the moment and is lower than the second preset low-temperature interval, in order to shorten the self-cleaning period as much as possible while improving the user experience, the preset target temperature is set to be a low proper temperature which is smaller than an ideal temperature, the air conditioner can be switched to a heating mode for temperature improvement, on the basis, further, the air conditioner is switched to the heating mode for temperature improvement, and the user comfort and the self-cleaning efficiency are both considered, a first heating period is set, namely, when the air conditioner is switched to the heating mode, the first heating period is started, if the indoor environment temperature is detected to be higher than the low proper temperature in the period, the heating effect is better, and the user comfort temperature is reached, at the moment, the air conditioner can be switched back to the self-cleaning mode for continuous execution, and after the self-cleaning mode is switched back, the indoor environment temperature is still monitored to ensure that the air conditioner is switched to the heating mode when the temperature is lower; if at the end of the first heating period, the indoor environment temperature still does not reach the low suitable temperature, which means that the heating effect is not obvious, if the heating mode is kept again, the indoor environment temperature rising effect is poor, and the self-cleaning period is prolonged, so in this case, in order to ensure the self-cleaning efficiency, after the end of the first heating period, the air conditioner is switched from the heating mode back to the self-cleaning mode, and in this round of self-cleaning, the mode is not switched according to the indoor environment temperature any more, but the self-cleaning task is directly executed until the self-cleaning is completed.

When the air conditioner stably operates in the self-cleaning mode, if the indoor environment temperature is detected to fall in a second preset low-temperature interval, the temperature is lower at the moment but higher than the first preset low-temperature interval, and the difficulty of raising the temperature to the ideal temperature is lower, wherein the ideal temperature is higher than the low proper temperature, so that the air conditioner is switched to the heating mode for raising the temperature in order to better raise the user experience, the indoor environment temperature is monitored to ensure that the air conditioner is switched to the heating mode for raising the temperature in order to better consider the user comfort and the self-cleaning efficiency, a second heating period is set, namely, when the air conditioner is switched to the heating mode, the second heating period is started, if the indoor environment temperature is detected to rise to the ideal temperature in the period, the heating effect is better, and the most comfortable temperature of a user is reached, and at the moment, the air conditioner can be switched from the heating mode back to the self-cleaning mode for continuously executing the self-cleaning, and after the self-cleaning mode is still switched to the self-cleaning mode, the indoor environment temperature is monitored to ensure that the air conditioner is switched to the heating mode for being lower; if at the end of the second heating period, the indoor environment temperature still does not reach the ideal temperature, which means that the heating effect is not obvious, if the heating mode is kept again, the indoor environment temperature rising effect is poor, and the self-cleaning period is prolonged, so in this case, in order to ensure the self-cleaning efficiency, after the end of the second heating period, the air conditioner is switched back to the self-cleaning mode from the heating mode, and in the self-cleaning of the present round, the mode is not switched according to the indoor environment temperature any more, but the self-cleaning task is directly executed until the self-cleaning is completed.

It should be noted that, the most comfortable temperatures of different users are different, and the ideal temperature may be a more comfortable temperature selected by integrating the needs of most people, which is not limited herein; the low proper temperature is also a temperature which is more comfortable for human body, and the specific setting of the temperature can be preset by manufacturers; the specific time periods of the first heating period and the second heating period may be the same or different, and the specific time periods are set by a manufacturer according to actual requirements, which is not limited herein.

Referring to fig. 6, fig. 6 is a second workflow diagram of a controller according to an embodiment of the present invention, the controller further configured to perform steps S13 to S25:

s13, when the air conditioner stably operates in a self-cleaning mode, acquiring indoor environment temperature E, and then entering step S14;

s14, judging whether the indoor environment temperature E falls in a preset first low-temperature zone, namely E is smaller than L, if so, entering a step S15, and if not, entering a step S20.

S15, controlling the air conditioner to switch from a self-cleaning mode to a heating mode, and then entering step S16.

S16, judging whether the indoor environment temperature E reaches the low proper temperature U-M or not and the current moment is in the first heating period, if so, entering a step S17, and if not, entering a step S18.

S17, controlling the air conditioner to switch from the heating mode to the self-cleaning mode.

And S18, judging whether the current time exceeds the first heating period, if so, entering a step S19, and if not, returning to the step S16.

S19, controlling the air conditioner to switch back to the self-cleaning mode from the heating mode, so that the air conditioner executes the self-cleaning task until the self-cleaning is finished.

S20, judging whether the indoor environment temperature E falls in a preset second low-temperature interval, namely L is less than or equal to E and less than U-M, if yes, entering a step S21, and if not, entering other control logics, namely the following steps S26-S38.

S21, controlling the air conditioner to switch from a self-cleaning mode to a heating mode, and then entering step S22.

S22, judging whether the indoor environment temperature E reaches the ideal temperature U or not and the current moment is in the second heating period, if so, entering a step S23, and if not, entering a step S24.

S23, controlling the air conditioner to switch from the heating mode to the self-cleaning mode.

S24, judging whether the current time exceeds the second heating period, if so, entering a step S25, and if not, returning to the step S22.

S25, controlling the air conditioner to switch back to the self-cleaning mode from the heating mode, so that the air conditioner executes the self-cleaning task until the self-cleaning is finished.

Specifically, in a preferred embodiment, the controller is further configured to: when the indoor environment temperature is in a preset high-temperature interval, controlling the air conditioner to switch from the self-cleaning mode to a refrigeration mode; in a preset refrigerating period after the air conditioner enters the refrigerating mode, if the indoor environment temperature is detected to reach a preset target temperature, controlling the air conditioner to switch back to the self-cleaning mode from the refrigerating mode; wherein the preset target temperature is less than the minimum value of the preset high temperature interval; and in the refrigerating mode, when the indoor environment temperature does not reach the preset target temperature and the current time exceeds the preset refrigerating period, controlling the air conditioner to switch back to the self-cleaning mode from the refrigerating mode, so that the air conditioner executes self-cleaning until the air conditioner is finished.

Specifically, the adjusting the operation parameters of the air conditioner according to the indoor environment temperature comprises the following steps: and controlling the air conditioner to switch between a refrigerating mode and a self-cleaning mode according to the indoor environment temperature. Specifically, considering the situation that the indoor environment temperature is high, when the indoor environment temperature is in a preset high temperature zone, the explanation temperature is high, and the user comfort level is poor, so that the air conditioner is switched from the self-cleaning mode to the refrigeration mode, the indoor environment temperature is reduced, and the indoor environment temperature is reduced to a comfortable temperature zone of the user. Further, in order to give consideration to user comfort and self-cleaning efficiency, a preset refrigerating period is set, namely, when the air conditioner is switched to a refrigerating mode, the air conditioner enters the preset refrigerating period, if the indoor environment temperature is detected to be reduced to a preset target temperature in the period, the refrigerating effect is better, and the temperature which is more comfortable for the user is reached, at the moment, the air conditioner can be switched back to the self-cleaning mode from the refrigerating mode to continue to execute self-cleaning, and after the air conditioner is switched back to the self-cleaning mode, the indoor environment temperature is still monitored to ensure that the air conditioner is switched to the refrigerating mode when the temperature is higher; if the indoor environment temperature still does not reach the preset target temperature after the preset refrigerating period is finished, the refrigerating effect is not obvious, if the refrigerating mode is kept, the indoor environment temperature reducing effect is poor, and the self-cleaning period is prolonged, so that in order to ensure the self-cleaning efficiency, the air conditioner is switched from the refrigerating mode back to the self-cleaning mode after the preset refrigerating period is finished, and in the self-cleaning of the wheel, the mode is not switched according to the indoor environment temperature any more, and the self-cleaning task is directly executed until the self-cleaning is finished.

Specifically, in a preferred embodiment, the preset high temperature interval includes a first preset high temperature interval and a second preset high temperature interval, and a maximum value of the first preset high temperature interval is smaller than a minimum value of the second preset high temperature interval; the preset target temperature at least comprises a high suitable temperature and an ideal temperature, wherein the high suitable temperature is larger than the ideal temperature, and the high suitable temperature is smaller than the minimum value of the first preset high temperature interval; the preset refrigerating time period comprises a first refrigerating time period and a second refrigerating time period; the preset target temperature corresponding to the first preset high temperature interval is the ideal temperature, the preset target temperature corresponding to the second preset high temperature interval is the high proper temperature, the preset refrigeration period corresponding to the first preset high temperature interval is the first refrigeration period, and the preset refrigeration period corresponding to the second preset high temperature interval is the second refrigeration period.

Specifically, in order to more accurately consider self-cleaning efficiency and user experience, the preset high temperature interval is divided into a first preset high temperature interval and a second preset high temperature interval, and the maximum value of the first preset high temperature interval is smaller than the minimum value of the second preset high temperature interval.

When the air conditioner stably operates in the self-cleaning mode, if the indoor environment temperature is detected to fall in a first preset low-temperature interval, the temperature is higher at the moment but lower than the second preset low-temperature interval, and the difficulty of reducing the temperature to the ideal temperature is lower, so that the air conditioner is switched to a refrigerating mode to reduce the indoor environment temperature in order to better improve the user experience, on the basis, in order to better consider the user comfort and the self-cleaning efficiency, a first refrigerating period is set, namely, when the air conditioner is switched to the refrigerating mode, the first refrigerating period is entered, if the indoor environment temperature is detected to fall in the first refrigerating period, the refrigerating effect is better, and the most comfortable temperature of a user is still reached, at the moment, the air conditioner can be switched back to the self-cleaning mode from the refrigerating mode, and after the self-cleaning mode is switched back, the indoor environment temperature is monitored to ensure that the air conditioner is switched to the refrigerating mode when the temperature is higher; if the indoor environment temperature still falls below the ideal temperature at the end of the first refrigeration period, the refrigeration effect is not obvious, if the refrigeration mode is kept again, the indoor environment temperature falling effect is also poor, and the self-cleaning period is prolonged, so that in order to ensure the self-cleaning efficiency, the air conditioner is switched from the refrigeration mode back to the self-cleaning mode after the end of the first refrigeration period, and in the self-cleaning of the self-cleaning wheel, the mode is not switched according to the indoor environment temperature any more, but the self-cleaning task is directly executed until the self-cleaning is finished.

When the air conditioner stably operates in the self-cleaning mode, if the indoor environment temperature is detected to fall in a second preset low-temperature interval, the air conditioner is higher at the moment and is higher than the first preset low-temperature interval, in order to shorten the self-cleaning period as much as possible while improving the user experience, the preset target temperature is set to be high suitable temperature, the high suitable temperature is higher than ideal temperature, the air conditioner can be switched to a refrigerating mode for temperature reduction, on the basis, further, in order to achieve both user comfort and self-cleaning efficiency, a second refrigerating period is set, namely, when the air conditioner is switched to the refrigerating mode, the air conditioner enters the second refrigerating period, if the indoor environment temperature is detected to fall to be high suitable temperature in the period, the refrigerating effect is better, and the user comfort temperature is reached, at the moment, the air conditioner can be switched back to the self-cleaning mode from the refrigerating mode for continuous self-cleaning, and after the self-cleaning mode is switched back, the indoor environment temperature is still monitored to ensure that the air conditioner is switched to the refrigerating mode when the temperature is higher; if at the end of the first cooling period, the indoor environment temperature still does not reach the high suitable temperature, which means that the cooling effect is not obvious, if the cooling mode is kept again, the indoor environment temperature drop effect is also poor, and the self-cleaning period is prolonged, so in this case, in order to ensure the self-cleaning efficiency, after the end of the second cooling period, the air conditioner is switched from the cooling mode back to the self-cleaning mode, and in the self-cleaning of the present wheel, the mode is not switched according to the indoor environment temperature any more, but the self-cleaning task is directly executed until the self-cleaning is completed.

It should be noted that, the most comfortable temperatures of different users are different, and the ideal temperature may be a more comfortable temperature selected by integrating the needs of most people, which is not limited herein; the high proper temperature is also a temperature which is more comfortable for human body, and the specific setting of the temperature can be preset by manufacturers; the specific time periods of the first refrigeration period and the second refrigeration period can be the same or different, and the specific time periods are set by manufacturers according to actual requirements and are not limited herein.

Referring to fig. 7, fig. 7 is a third workflow diagram of a controller according to an embodiment of the present invention, the controller further configured to perform steps S26 to S38:

s26, when the air conditioner stably operates in a self-cleaning mode, acquiring indoor environment temperature E, and then entering step S27;

s27, judging whether the indoor environment temperature E falls in a preset first high temperature interval or not, namely U+N is less than or equal to E and less than H, wherein N is a preset positive number, if yes, entering a step S28, and if not, entering a step S33.

And S28, controlling the air conditioner to switch from the self-cleaning mode to the refrigeration mode, and then entering step S29.

And S29, judging whether the indoor environment temperature E reaches the ideal temperature U or not and the current moment is in the first refrigerating period, if so, entering a step S30, and if not, entering a step S31.

S30, controlling the air conditioner to switch from the refrigeration mode to the self-cleaning mode.

S31, judging whether the current moment exceeds the first refrigerating period, if so, entering a step S32, and otherwise, returning to the step S29.

S32, controlling the air conditioner to switch back to the self-cleaning mode from the refrigerating mode, so that the air conditioner executes the self-cleaning task until the self-cleaning is finished.

S33, judging whether the indoor environment temperature E falls in a preset second high temperature zone, namely E > H, if so, entering a step S34, and if not, entering other control logics, namely steps S13-S25.

S34, controlling the air conditioner to switch from a self-cleaning mode to a refrigerating mode, and then entering step S35.

And S35, judging whether the indoor environment temperature E reaches the high proper temperature U+M or not and whether the current moment is in a second refrigerating period, wherein M is a preset positive number, if so, entering a step S36, and if not, entering a step S37.

S36, controlling the air conditioner to switch from the refrigeration mode to the self-cleaning mode.

S37, judging whether the current time exceeds the second refrigerating period, if so, entering a step S38, and if not, returning to the step S35.

S38, controlling the air conditioner to switch back to the self-cleaning mode from the refrigerating mode, so that the air conditioner executes the self-cleaning task until the self-cleaning is finished.

Specifically, in a preferred embodiment, the controller is further configured to:

Referring to fig. 8, fig. 8 is a fourth operation flowchart of the controller according to the embodiment of the present invention, and the controller is further configured to perform steps S39 to S45:

s39, acquiring an operation mode of the air conditioner, and then entering step S40.

S40, judging whether the operation mode is an indoor heat exchanger self-cleaning mode, if so, entering a step S41, and if not, returning to the step S39.

S41, acquiring a state of the air conditioner at the previous moment of switching back to the self-cleaning mode, and then entering step S42.

S42, judging whether the state of the indoor fan at the previous moment is in an operating state, if so, proceeding to step S43, otherwise, proceeding to step S44.

S43, controlling the indoor fan to continue to operate for a preset operation time.

Specifically, the indoor fan is briefly started in the freezing process, so that the air circulation is increased, more moisture in the air passes through the heat exchanger to be cleaned, more frost is formed on the surface of the heat exchanger to be cleaned, and the heat exchanger to be cleaned is cleaned.

S44, judging whether the state at the previous moment is a stop state, if so, proceeding to step S45, otherwise proceeding to the rest control logic, as in steps S13-S25.

S45, controlling the air conditioner to keep a shutdown state for a preset shutdown time, controlling the indoor heat exchanger to freeze for a preset freezing time after the preset shutdown time, and controlling the indoor fan to operate in the freezing process of the preset freezing time.

when the freezing treatment is finished, controlling the air conditioner to enter a defrosting stage of the heat exchanger to be cleaned, so that the heat exchanger to be cleaned functions as a condenser to enable the heat exchanger to be cleaned to perform defrosting treatment; the pressure reducer is an expansion valve, and the opening of the expansion valve under defrosting treatment is smaller than or equal to the opening of the expansion valve under freezing treatment. The opening of the expansion valve in the freezing process is larger than or equal to that in the defrosting process, and the refrigerant keeps higher defrosting temperature in the defrosting process, so that the surface defrosting of the heat exchanger to be cleaned is facilitated.

Referring to fig. 9 and 10, fig. 9 is a schematic view of a flow direction of a refrigerant in a cooling mode provided by an embodiment of the present invention, and fig. 10 is a schematic view of a flow direction of a refrigerant in a heating mode provided by an embodiment of the present invention, and the air conditioner further includes a four-way valve; the exhaust port of the compressor 10 is connected with the first end of the four-way valve 3, the second end of the four-way valve 3 is connected with the first end of the outdoor heat exchanger 2, the second end of the outdoor heat exchanger 2 is connected with the first end of the pressure reducer 30, the second end of the pressure reducer 30 is connected with the first end of the indoor heat exchanger 1, the second end of the indoor heat exchanger 1 is connected with the third end of the four-way valve 3, and the fourth end of the four-way valve 3 is connected with the air suction port of the compressor 10. The flow direction of the refrigerant is controlled by controlling the state of the four-way valve 3, thereby controlling the operation mode of the air conditioner. In the cooling mode, the first and second ends of the four-way valve 3 are communicated, the third and fourth ends of the four-way valve 3 are communicated, the compressor 10 compresses the refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas through the discharge port, the discharged refrigerant gas flows to the first end of the four-way valve 3, and then flows from the second end of the four-way valve 3 to the first end of the outdoor heat exchanger 2, the outdoor heat exchanger 2 serves as a condenser, the compressed refrigerant is condensed into a liquid phase, and heat is released to the surrounding environment (outdoor) through the condensation process, the refrigerant discharged from the second end of the outdoor heat exchanger 2 flows into the first end of the pressure reducer 30, the pressure reducer 30 expands the refrigerant into a low-pressure liquid phase for cooling, the second end of the pressure reducer 30 flows to the indoor heat exchanger 1, the indoor heat exchanger 1 serves as an evaporator for evaporating the refrigerant expanded in the pressure reducer 30, and the refrigerant gas in a low-temperature and low-pressure state is returned to the compressor 10, wherein the indoor heat exchanger 1 can perform a cooling effect by exchanging heat with a material to be cooled by utilizing the evaporation of the refrigerant. In the heating mode, the first end and the third end of the four-way valve 3 are communicated, the second end and the fourth end of the four-way valve 3 are communicated, the compressor 10 compresses the refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas through the gas discharge port, the discharged refrigerant gas respectively flows to the first end of the four-way valve 3, then flows from the third end of the four-way valve 3 to the second end of the indoor heat exchanger 1, the indoor heat exchanger 1 serves as a condenser, the compressed refrigerant is condensed into a liquid phase, and heat is released to the surrounding environment (room) through the condensation process, the refrigerant discharged from the first end of the indoor heat exchanger 1 flows into the second end of the pressure reducer 30, the pressure reducer 30 expands the refrigerant into a low-pressure liquid phase for cooling, the first end of the pressure reducer 30 flows to the outdoor heat exchanger 2, the outdoor heat exchanger 2 serves as an evaporator for evaporating the refrigerant expanded in the pressure reducer 30, and the refrigerant gas in a low-temperature and low-pressure state is returned to the compressor 10 through the second end and the fourth end of the four-way valve 3.

When the air conditioner is in the freezing stage of the self-cleaning mode of the indoor heat exchanger, the flow direction of the refrigerant is the same as the flow direction of the refrigerant in the refrigerating mode, and when the air conditioner is in the freezing stage of the self-cleaning mode of the outdoor heat exchanger, the flow direction of the refrigerant is the same as the flow direction of the refrigerant in the heating mode. As is clear from this, in the present embodiment, when the air conditioner is switched between the heating mode and the indoor heat exchanger self-cleaning mode or between the cooling mode and the outdoor heat exchanger self-cleaning mode, the flow direction of the refrigerant is changed, and it is necessary to perform shutdown processing at the time of mode switching in order to protect the system.

Compared with the prior art, the air conditioner disclosed by the embodiment of the invention is provided with the indoor temperature detection device in the room for detecting the indoor environment temperature, and the indoor environment temperature is monitored in real time when the air conditioner is stably operated in the self-cleaning mode so as to adjust the operation parameters of the air conditioner according to the indoor environment temperature, thereby avoiding uncomfortable feeling of a user caused by overlarge change of the indoor environment temperature in the self-cleaning process and improving the user experience.

Referring to fig. 11, fig. 11 is a schematic flow chart of a self-cleaning control method of an air conditioner according to an embodiment of the present invention, where the self-cleaning control method of the air conditioner according to the embodiment of the present invention is implemented by executing a controller in the air conditioner, and includes steps S1 to S2:

S1, controlling an air conditioner to enter a self-cleaning mode, and enabling a heat exchanger to be cleaned to function as an evaporator so as to enable the heat exchanger to be cleaned to be frozen; wherein the heat exchanger to be cleaned is the outdoor heat exchanger or the indoor heat exchanger;

s2, adjusting the operation parameters of the air conditioner according to the acquired indoor environment temperature.

Specifically, in a preferred embodiment, the adjusting the operation parameter of the air conditioner according to the obtained indoor environment temperature includes:

Specifically, in a preferred embodiment, the method further comprises:

It should be noted that, specific steps of the method described in the above embodiment may refer to the working process of the air conditioner in the above embodiment, and will not be described herein.

Compared with the prior art, the self-cleaning control method for the air conditioner disclosed by the embodiment of the invention has the advantages that the indoor temperature detection device arranged indoors is utilized, when the air conditioner is stably operated in the self-cleaning mode, the indoor environment temperature is monitored in real time, so that the operation parameters of the air conditioner are adjusted according to the indoor environment temperature, the uncomfortable feeling of a user caused by overlarge change of the indoor environment temperature in the self-cleaning process is avoided, and the user experience is improved.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims

1. An air conditioner, comprising:

a controller configured to:

2. The air conditioner of claim 1, wherein the controller is further configured to:

3. The air conditioner of claim 2, wherein the preset low temperature section includes a first preset low temperature section and a second preset low temperature section, a maximum value of the first preset low temperature section being smaller than a minimum value of the second preset low temperature section; the preset target temperature at least comprises a low suitable temperature and an ideal temperature, wherein the low suitable temperature is smaller than the ideal temperature, and the low suitable temperature is larger than the maximum value of the second preset low temperature interval; the preset heating time period comprises a first heating time period and a second heating time period; the preset target temperature corresponding to the first preset low temperature interval is the low suitable temperature, the preset target temperature corresponding to the second preset low temperature interval is the ideal temperature, the preset heating period corresponding to the first preset low temperature interval is the first heating period, and the preset heating period corresponding to the second preset low temperature interval is the second heating period.

4. The air conditioner of claim 1, wherein the controller is further configured to:

5. The air conditioner of claim 4, wherein the preset high temperature section includes a first preset high temperature section and a second preset high temperature section, a maximum value of the first preset high temperature section being smaller than a minimum value of the second preset high temperature section; the preset target temperature at least comprises a high suitable temperature and an ideal temperature, wherein the high suitable temperature is larger than the ideal temperature, and the high suitable temperature is smaller than the minimum value of the first preset high temperature interval; the preset refrigerating time period comprises a first refrigerating time period and a second refrigerating time period; the preset target temperature corresponding to the first preset high temperature interval is the ideal temperature, the preset target temperature corresponding to the second preset high temperature interval is the high proper temperature, the preset refrigeration period corresponding to the first preset high temperature interval is the first refrigeration period, and the preset refrigeration period corresponding to the second preset high temperature interval is the second refrigeration period.

6. The air conditioner as set forth in any one of claims 2 to 5, wherein said controller is further configured to:

7. The air conditioner of claim 6, wherein the controller is further configured to:

8. The air conditioner of claim 2 or 3, wherein the controller is further configured to:

9. The self-cleaning control method of the air conditioner is characterized by comprising the following steps of:

10. The self-cleaning control method of an air conditioner as claimed in claim 9, wherein said adjusting the operation parameters of the air conditioner according to the obtained indoor environment temperature comprises: