Air conditioner indoor unit

Abstract

The application discloses an air conditioner indoor unit, comprising: a shell, which is provided with an indoor air inlet, a fresh air inlet, an air outlet and an air duct, the air duct being communicated with the indoor air inlet, the fresh air inlet and the air outlet respectively; a steam generation module, which is used for generating steam; a fresh air fan, which is installed in the air duct; a first sensor, which is used for detecting an indoor CO2 concentration value; a second sensor, which is used for detecting an indoor O2 concentration value; and a controller, which acquires a steam air washing function opening signal, controls the steam generation module to generate steam, acquires the indoor CO2 concentration value and the indoor O2 concentration value, judges whether the indoor CO2 concentration value is not greater than a first preset value and whether the indoor O2 concentration value is not less than a second preset value, closes the fresh air inlet and opens the indoor air inlet if yes, and opens the fresh air inlet if no. The air conditioner indoor unit according to the embodiment of the application can humidify, purify and disinfect and kill bacteria of air, and can adjust the indoor CO2 concentration and O2 concentration, so that the indoor air environment is comfortable.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioners, in particular to an air conditioner indoor unit. BACKGROUND

[0002] The air conditioner indoor unit in the related art can generally sterilize and humidify indoor air at high temperature to improve the comfort of the indoor air environment, but when the user uses the air conditioner indoor unit, the user usually needs to close the doors and windows, and the user is prone to cause the CO2 concentration of the indoor air to rise or the O2 concentration of the indoor air to decrease after staying indoors for a long time. The air conditioner indoor unit in the related art cannot adjust the CO2 concentration and O2 concentration of the indoor air, cannot guarantee the comfort of the indoor air for a long time, and the user experience is poor. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, one object of the present application is to provide an air conditioner indoor unit which can humidify, purify and sterilize air, and can adjust the CO2 concentration and O2 concentration of the indoor air to maintain the comfort of the indoor air environment.

[0004] In order to achieve the above-mentioned purpose, according to an embodiment of the present application, an air conditioner indoor unit is provided, comprising: a shell provided with an indoor air inlet, a fresh air inlet, an air outlet and an air duct, the air duct being in communication with the indoor air inlet, the fresh air inlet and the air outlet respectively; a steam generation module installed in the shell for generating steam, the gas in the air duct forming a purified gas after passing through the steam generated by the steam generation module, the purified gas being discharged from the air outlet; a fresh air fan installed in the air duct for guiding outdoor air from the fresh air inlet to the air duct and guiding indoor air from the indoor air inlet to the air duct; a first sensor installed on the shell for obtaining a detected CO2 concentration value; a second sensor installed on the shell for detecting an indoor O2 concentration value; a controller installed in the shell and connected with the steam generation module, the fresh air module, the first sensor and the second sensor respectively; the controller is configured to, when a steam washing air function opening signal is obtained, control the steam generation module to generate steam, obtain the indoor CO2 concentration value detected by the first sensor and the indoor O2 concentration value detected by the second sensor, determine whether the indoor CO2 concentration value is not greater than a first preset value and the indoor O2 concentration value is not less than a second preset value, if yes, close the fresh air inlet and open the indoor air inlet, control the fresh air fan to operate to guide indoor air into the air duct, if not, open the fresh air inlet, control the fresh air fan to operate to guide outdoor air into the air duct.

[0005] The air conditioner indoor unit according to the embodiment of the present application can humidify, purify and sterilize air, and can adjust the concentration of CO2 and O2 in the room, so as to keep the indoor air environment comfortable

[0006] According to some embodiments of the present application, when the steam air-washing function is turned on, if the fresh air inlet is closed and the indoor air inlet is opened, the fresh air fan runs at the highest speed, and the steam generation module works at the highest power.

[0007] According to some embodiments of the present application, the air conditioner indoor unit further comprises a third sensor installed on the shell and connected with the controller, for detecting the indoor temperature; and a fourth sensor connected with the controller, for detecting the outdoor temperature; wherein, when the steam air-washing function is turned on and the fresh air inlet is opened, the controller acquires the indoor temperature detected by the third sensor and the outdoor temperature detected by the fourth sensor, judges whether the absolute value of the difference between the indoor temperature and the outdoor temperature is less than a third preset value, and if yes, closes the indoor air inlet, and if not, opens the indoor air inlet to control the fresh air fan to run to guide indoor air and outdoor air into the air duct.

[0008] According to some embodiments of the present application, when the steam air-washing function is turned on, if the fresh air inlet is opened and the indoor air inlet is opened, the fresh air fan runs at the lowest speed, and the steam generation module works at the lowest power.

[0009] According to some embodiments of the present application, when the steam air-washing function is turned on; if the fresh air inlet is closed and the indoor air inlet is opened, the fresh air fan runs at a first speed; if the fresh air inlet is opened and the indoor air inlet is closed, the fresh air fan runs at a second speed; and if the fresh air inlet is opened and the indoor air inlet is opened, the fresh air fan runs at a third speed; wherein, the first speed, the second speed and the third speed decrease in turn.

[0010] According to some embodiments of the present application, when the steam air-washing function is turned on; if the fresh air inlet is closed and the indoor air inlet is opened, the steam generation module works at a first power; if the fresh air inlet is opened and the indoor air inlet is closed, the steam generation module works at a second power; and if the fresh air inlet is opened and the indoor air inlet is opened, the steam generation module works at a third power; wherein, the first power, the second power and the third power decrease in turn.

[0011] According to some embodiments of the present application, the steam generating module comprises: a base, which is installed on the shell; a water tank, which is installed on the base; a heating body, which is installed on the base and extends into the water tank; and a filter screen, which is installed on the water tank and covers the opening of the water tank.

[0012] According to some embodiments of the present application, the indoor air inlet and the fresh air inlet are located on the rear side of the shell and at the same height.

[0013] According to some embodiments of the present application, the air conditioner indoor unit further comprises: a baffle, which is rotatably installed on the shell between a first position, a second position and a third position, wherein when the baffle is in the first position, the baffle covers the fresh air inlet and exposes the indoor air inlet, when the baffle is in the second position, the baffle covers the indoor air inlet and exposes the fresh air inlet, and when the baffle is in the third position, the baffle exposes the indoor air inlet and the fresh air inlet.

[0014] According to some embodiments of the present application, when the air conditioner indoor unit is turned off, the baffle is in the first position.

[0015] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a structural schematic diagram of an air conditioner indoor unit according to an embodiment of the present application.

[0018] Figure 2 is another structural schematic diagram of an air conditioner indoor unit according to an embodiment of the present application.

[0019] Figure 3 is a structural schematic diagram of an air conditioner indoor unit according to an embodiment of the present application from another perspective.

[0020] Figure 4 is an exploded view of an air conditioner indoor unit according to an embodiment of the present application.

[0021] Figure 5 is a structural schematic diagram of a water tank of an air conditioner indoor unit according to an embodiment of the present application.

[0022] Figure 6 is a structural schematic diagram of a baffle of an air conditioner indoor unit according to an embodiment of the present application in a first position.

[0023] Figure 7 is a structural schematic view of a baffle of an air conditioner indoor unit according to an embodiment of the present application in a second position.

[0024] Figure 8 is a structural schematic view of a baffle of an air conditioner indoor unit according to an embodiment of the present application in a third position.

[0025] Figure 9 is a flow chart of an air conditioner indoor unit according to an embodiment of the present application.

[0026] Figure 10 is a partial flow chart of an air conditioner indoor unit according to an embodiment of the present application.

[0027] Reference Signs:

[0028] an air conditioner indoor unit 1,

[0029] a shell 100, an indoor air inlet 110, a fresh air inlet 120, an air outlet 130, an air duct 140,

[0030] a steam generation module 200, a base 210, a water tank 220, an opening 221, an outlet 222, a heating body 230, a filter screen 240,

[0031] a fresh air fan 300, a baffle 400. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments of the present application described below with reference to the accompanying drawings are exemplary.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0034]

[0035] "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0036] In the description of the present application, the meaning of "a plurality of" is two or more.

[0037] An air conditioner indoor unit 1 according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0038] As Figures 1-10As shown, the air conditioner indoor unit 1 according to the embodiment of the present application comprises a shell 100, a steam generation module 200, a fresh air fan 300, a first sensor, a second sensor and a controller.

[0039] The shell 100 is provided with an indoor air inlet 110, a fresh air inlet 120, an air outlet 130 and an air duct 140, and the air duct 140 is communicated with the indoor air inlet 110, the fresh air inlet 120 and the air outlet 130 respectively. The steam generation module 200 is installed in the shell 100 and used for generating steam. The gas in the air duct 140 forms purified gas by the steam generated by the steam generation module 200, and the purified gas is discharged from the air outlet 130. The fresh air fan 300 is installed in the air duct 140 and used for guiding outdoor air from the fresh air inlet 120 to the air duct 140 and guiding indoor air from the indoor air inlet 110 to the air duct 140. The first sensor is installed in the shell 100 and used for detecting the indoor CO2 concentration value. The second sensor is installed in the shell 100 and used for detecting the indoor O2 concentration value. The controller is installed in the shell 100 and connected with the steam generation module 200, the fresh air module, the first sensor and the second sensor respectively.

[0040] The controller is configured to, when a steam washing air function opening signal is acquired, control the steam generation module 200 to generate steam, acquire the indoor CO2 concentration value detected by the first sensor and the indoor O2 concentration value detected by the second sensor, judge whether the indoor CO2 concentration value is not greater than a first preset value and the indoor O2 concentration value is not less than a second preset value, if yes, close the fresh air inlet 120 and open the indoor air inlet 110, control the fresh air fan 300 to operate and guide indoor air to enter the air duct 140, and if not, open the fresh air inlet 120, control the fresh air fan 300 to operate and guide outdoor air to enter the air duct 140.

[0041] In the embodiment of the present application, the air conditioner indoor unit 1 can be a wall-mounted air conditioner indoor unit or a floor-standing air conditioner indoor unit.

[0042] According to the air conditioner indoor unit 1 of the embodiment of the present application, the shell 100 is provided with the indoor air inlet 110, the fresh air inlet 120, the air outlet 130 and the air duct 140, and the air duct 140 is communicated with the indoor air inlet 110, the fresh air inlet 120 and the air outlet 130 respectively, the steam generation module 200 is installed in the shell 100 and used for generating steam, the gas in the air duct 140 forms purified gas by the steam generated by the steam generation module 200, and the purified gas is discharged from the air outlet 130, and the fresh air fan 300 is installed in the air duct 140 and used for guiding outdoor air from the fresh air inlet 120 to the air duct 140 and guiding indoor air from the indoor air inlet 110 to the air duct 140.

[0043] In this way, the air conditioner indoor unit 1 can guide outdoor fresh air into the shell 100 through the fresh air fan 300 and guide indoor air into the shell 100 through the indoor air inlet, and the steam generated by the steam generation module 200 can form a high-temperature steam barrier. The outdoor fresh air and indoor air pass through the high-temperature steam barrier generated by the steam generation module 200 and then flow to the indoor through the air outlet 130. Thus, the high-temperature steam of the steam generation module 200 can sterilize the airflow, and the airflow can carry the steam generated by the steam generation module 200 into the indoor to humidify the indoor air, which is beneficial to improve the humidity of the indoor air, avoid the indoor air being too dry, and make the user more comfortable. In addition, the dust and impurities in the outdoor fresh air and indoor air flowing into the shell 100 fall when mixed with the steam passing through the high-temperature steam barrier of the steam generation module 200, thereby achieving dust removal of the airflow.

[0044] In addition, the first sensor is installed on the shell 100 to detect the indoor CO2 concentration value, the second sensor is installed on the shell 100 to detect the indoor O2 concentration value, and the controller is installed in the shell 100 and connected with the steam generation module 200, the fresh air module, the first sensor, and the second sensor. The first sensor can detect the indoor CO2 concentration value, the second sensor can detect the indoor O2 concentration value, and the controller can receive the feedback of the indoor CO2 concentration value and the indoor O2 concentration value.

[0045] Specifically, the controller is configured to, when a steam air washing function opening signal is obtained, control the steam generation module 200 to generate steam, obtain the indoor CO2 concentration value detected by the first sensor and the indoor O2 concentration value detected by the second sensor, determine whether the indoor CO2 concentration value is not greater than a first preset value and the indoor O2 concentration value is not less than a second preset value, and if so, close the fresh air inlet 120 and open the indoor air inlet 110, and control the fresh air fan 300 to operate to guide indoor air into the air duct 140. If not, open the fresh air inlet 120 and control the fresh air fan 300 to operate to guide outdoor air into the air duct 140.

[0046] That is, when the indoor CO2 concentration value is not higher than the standard value and the indoor O2 concentration value is not lower than the standard value, it indicates that the indoor CO2 concentration is not over standard and the indoor O2 concentration is sufficient. At this time, the indoor air quality is good, and there is no need to introduce outdoor fresh air to neutralize and purify the indoor air. Only the indoor air inlet 110 needs to be opened for indoor air circulation, and the operation steps of the air conditioner indoor unit 1 are simpler.

[0047] When the indoor CO2 concentration value is greater than the first preset value or the indoor O2 concentration value is less than the second preset value, it indicates that the indoor CO2 concentration is excessive or the indoor O2 concentration is insufficient, or the indoor CO2 concentration is excessive and the indoor O2 concentration is insufficient, at this time, the indoor air quality is poor, and the outdoor fresh air can be introduced into the indoor by opening the fresh air inlet 120, thereby reducing the CO2 concentration of the indoor air and increasing the O2 concentration of the indoor air, gradually increasing the indoor air quality, and more suitable for user activities, and better user experience.

[0048] In this way, the air conditioner indoor unit 1 according to the embodiment of the present application can humidify, purify and sterilize the air, and can adjust the indoor CO2 concentration and O2 concentration, keeping the indoor air environment comfortable.

[0049] According to some specific embodiments of the present application, as shown in Figure 9 When the steam air cleaning function is opened, the fresh air inlet 120 is closed, and the indoor air inlet 110 is opened, the fresh air fan 300 operates at the highest speed, and the steam generation module 200 works at the highest power.

[0050] That is, when the air conditioner indoor unit 1 opens the steam air cleaning function and does not introduce outdoor fresh air, the fresh air fan 300 operates at the highest speed, the air guiding efficiency of the fresh air fan 300 is the largest, thereby accelerating the sterilization speed of the steam generation module 200 to the indoor air, and the air purification efficiency is higher, and the steam generation module 200 works at the highest power, the steam amount generated by the steam generation module 200 is more, thereby making the sterilization efficiency of the steam generation module 200 higher and the sterilization effect better.

[0051] According to some specific embodiments of the present application, as shown in Figure 9 The air conditioner indoor unit 1 further comprises a third sensor and a fourth sensor.

[0052] The third sensor is installed on the shell 100 and connected with the controller, for detecting the indoor temperature, and the fourth sensor is connected with the controller, for detecting the outdoor temperature, wherein the controller is configured to, when the steam air cleaning function opening signal is acquired and the fresh air inlet 120 is opened, acquire the indoor temperature detected by the third sensor and the outdoor temperature detected by the fourth sensor, judge whether the absolute value of the difference between the indoor temperature and the outdoor temperature is less than a third preset value, if yes, close the indoor air inlet 110, if not, open the indoor air inlet 110 to control the fresh air fan 300 to operate to guide the indoor air and the outdoor air into the air duct 140.

[0053] The absolute value of the difference between the indoor temperature and the outdoor temperature being less than the third preset value means that the indoor temperature is higher than the outdoor temperature, and the value of the indoor temperature exceeding the outdoor temperature is less than the third preset value, or the indoor temperature is lower than the outdoor temperature, and the value of the outdoor temperature exceeding the indoor temperature is less than the third preset value.

[0054] That is, when the air conditioner indoor unit 1 introduces outdoor fresh air, if the difference between the indoor air temperature and the outdoor air temperature is small, the indoor air inlet 110 is closed, at this time, the fresh air fan 300 only guides the outdoor fresh air into the shell 100 through the fresh air inlet 120, and after sterilizing the outdoor fresh air through the steam of the steam generation module 200, the outdoor fresh air is discharged to the indoor to purify the indoor air, increase the O2 concentration of the indoor air and reduce the CO2 concentration of the indoor air, and because the difference between the indoor air temperature and the outdoor air temperature is small, even if more outdoor air is introduced, the temperature of the indoor air will not change greatly, which is beneficial to reduce the temperature change of the indoor, and the user activity is more comfortable.

[0055] When the air conditioner indoor unit 1 introduces outdoor fresh air, if the difference between the indoor air temperature and the outdoor air temperature is large, the indoor air inlet 110 is opened, at this time, the fresh air fan 300 can guide the outdoor fresh air into the shell 100 through the fresh air inlet 120, and guide the indoor air into the shell 100 through the indoor air inlet 110, in this way, the outdoor fresh air and the indoor air can be mixed in the shell 100 to form a mixed air flow, the temperature of the mixed air flow is closer to the temperature of the indoor air relative to the temperature of the outdoor fresh air, and thus a large amount of outdoor fresh air entering the indoor to cause a large change in the indoor temperature can be avoided, and the user activity is more comfortable.

[0056] According to some specific embodiments of the present application, as shown in Figure 9 When the steam air cleaning function opening signal is acquired, the fresh air inlet 120 is opened, and the indoor air inlet 110 is opened, the fresh air fan 300 operates at the lowest speed, and the steam generation module 200 works at the lowest power.

[0057] It can be understood that the difference between the indoor temperature and the outdoor temperature at this time is large, by reducing the speed of the fresh air fan 300, the air guiding efficiency of the fresh air fan 300 will also be low, the air conditioner indoor unit 1 introduces less outdoor fresh air in unit time, and thus the outdoor fresh air and the indoor air can be mixed sufficiently in the shell 100, so that the temperature of the outdoor fresh air is closer to the temperature of the indoor air, and because the rate of introducing outdoor fresh air is slow, rapid fluctuation of the indoor temperature can be avoided.

[0058] And, the steam generation module 200 works at the lowest power, the steam generated by the steam generation module 200 is less, and thus the temperature of the indoor air can be prevented from rising too much after being sterilized by the steam, the high-temperature sterilization effect is ensured, and the thermal comfort of the user is improved, and the indoor temperature is more conducive to the activity of the user.

[0059] According to some embodiments of the present application, as shown in Figure 9 When the steam washing air function opening signal is acquired, if the fresh air inlet 120 is closed and the indoor air inlet 110 is opened, the fresh air fan 300 operates at a first rotating speed;

[0060] If the fresh air inlet 120 is opened and the indoor air inlet 110 is closed, the fresh air fan 300 operates at a second rotating speed;

[0061] If the fresh air inlet 120 is opened and the indoor air inlet 110 is opened, the fresh air fan 300 operates at a third rotating speed.

[0062] The first rotating speed, the second rotating speed and the third rotating speed are sequentially reduced.

[0063] That is, when only indoor air is circulated, the fresh air fan 300 operates at the highest first rotating speed, at this time, the air guiding efficiency of the fresh air fan 300 is the highest, and more air flows through the steam generation module 200 per unit time, and thus the indoor air can be quickly and high-temperature sterilized, and the sterilization effect is better.

[0064] When the difference between the indoor temperature and the outdoor temperature is small, the fresh air fan 300 only guides outdoor fresh air, and the fresh air fan 300 operates at a lower second rotating speed, at this time, the air guiding efficiency of the fresh air fan 300 is reduced, and the speed of the outdoor fresh air entering the shell 100 is reduced, so as to avoid that the temperature of the indoor air fluctuates too much, so that the user can be more comfortable.

[0065] When the difference between the indoor temperature and the outdoor temperature is large, the fresh air fan 300 guides both outdoor fresh air and indoor air, and the fresh air fan 300 operates at the lowest third rotating speed, at this time, the air guiding efficiency of the fresh air fan 300 is the lowest, so that the outdoor fresh air and the indoor air can be fully mixed in the shell 100, and further avoid that the indoor temperature fluctuates too much.

[0066] According to some embodiments of the present application, as shown in Figure 9 When the steam washing air function opening signal is acquired, if the fresh air inlet 120 is closed and the indoor air inlet 110 is opened, the steam generation module 200 works at a first power;

[0067] If the fresh air inlet 120 is opened and the indoor air inlet 110 is closed, the steam generation module 200 works at a second power;

[0068] If the fresh air inlet 120 is opened and the indoor air inlet 110 is opened, the steam generation module 200 works at a third power;

[0069] The first power, the second power and the third power are sequentially reduced.

[0070] That is, when only indoor air is circulated, the steam generation module 200 works at the highest first power, at which the high-temperature sterilization effect of the steam generation module 200 is the best, and the indoor air can be quickly and highly sterilized, and the sterilization effect is better.

[0071] When the difference between the indoor temperature and the outdoor temperature is small, the fresh air fan 300 only introduces outdoor fresh air, and the steam generation module 200 works at a lower second power, at which the amount of steam generated by the steam generation module 200 is reduced, and the temperature rise of the outdoor fresh air after passing through the steam generation module 200 is avoided, so that the user's thermal comfort can be adjusted to make the user more comfortable.

[0072] When the difference between the indoor temperature and the outdoor temperature is large, the fresh air fan 300 introduces both outdoor fresh air and indoor air, and the steam generation module 200 works at the lowest third power, at which the amount of steam generated by the steam generation module 200 is the least, and the temperature rise of the mixed air after passing through the steam generation module 200 is further avoided, so that the user's thermal comfort can be adjusted to make the user more comfortable.

[0073] According to some specific embodiments of the present application, as shown in Figure 4 The steam generation module 200 includes a base 210, a water tank 220, a heating body 230 and a filter screen 240.

[0074] The base 210 is installed in the shell 100, the water tank 220 is installed in the base 210, the heating body 230 is installed in the base 210 and extends into the water tank 220, and the filter screen 240 is installed in the water tank 220 and covers the opening 221 of the water tank 220.

[0075] The fresh air fan 300 can be arranged below the base 210 and in the shell 100, and the fresh air inlet 120 and the outdoor air inlet can be arranged below the shell 100. Since the steam has a small density, the steam generated by the steam generation module 200 will be located above the water tank 220. In this way, the outdoor fresh air and indoor air guided by the fresh air fan 300 can flow upwards along the air duct 140 and pass through the steam generated by the steam generation module 200, and the sterilization effect of the steam on the air flowing through the air duct 140 is better.

[0076] And, by setting the filter screen 240 at the opening 221 of the water tank 220, the filter screen 240 can be used to filter and remove dust from the air flowing through the air duct 140, further purifying the indoor air, making the indoor air quality better.

[0077] It should be noted that in some embodiments of the present application, the upper end of the water tank 220 can be provided with an outlet 222, and the airflow guided by the fresh air fan 300 flows through the air duct 140, and after being sterilized by the high-temperature steam generated by the steam generation module 200, it can flow to the air outlet 130 of the shell 100 through the outlet 222 of the water tank 220, and then be discharged to the indoor.

[0078] According to some specific embodiments of the present application, as shown in Figure 2 The indoor air inlet 110 and the fresh air inlet 120 are located on the rear side of the shell 100 and at the same height.

[0079] In this way, the indoor air inlet and the fresh air inlet 120 are relatively close, the air inlet of the fresh air fan 300 can be aligned with the indoor air inlet and the fresh air inlet 120 at the same time, and the indoor air inlet 110 and the fresh air inlet 120 can be simultaneously inducted by one fresh air fan 300, and the fresh air fan 300 can guide indoor air to enter the shell 100 through the indoor air inlet 110, and can also guide outdoor fresh air to enter the shell 100 through the fresh air inlet 120, which is beneficial to simplify the structure of the air conditioner indoor unit 1.

[0080] According to some specific embodiments of the present application, as shown in Figures 6-8 The air conditioner indoor unit 1 further comprises a baffle 400.

[0081] The baffle 400 is rotatably installed between the first position, the second position and the third position of the shell 100, and when the baffle is in the first position, the fresh air inlet 120 is shielded and the indoor air inlet 110 is exposed, when the baffle is in the second position, the indoor air inlet 110 is shielded and the fresh air inlet 120 is exposed, and when the baffle is in the third position, the indoor air inlet 110 and the fresh air inlet 120 are exposed.

[0082] In this way, the opening and closing of the indoor air inlet 110 and the opening and closing of the fresh air inlet 120 can be changed by rotating the baffle 400, and specifically, when the indoor CO2 concentration value is not greater than the first preset value and the indoor O2 concentration value is not less than the second preset value, the baffle 400 can be controlled to rotate to the first position, at this time, the fresh air fan 300 only indoor air inlet 110 can guide indoor air to circulate.

[0083] When the indoor CO2 concentration value is greater than the first preset value or the indoor O2 concentration value is less than the second preset value, or the indoor CO2 concentration value is greater than the first preset value and the indoor O2 concentration value is less than the second preset value, and the absolute value of the difference between the indoor temperature and the outdoor temperature is less than the third preset value, the baffle 400 is rotated to the second position, and at this time the fresh air fan 300 only guides the outdoor fresh air into the shell 100 through the fresh air inlet 120.

[0084] When the indoor CO2 concentration value is greater than the first preset value or the indoor O2 concentration value is less than the second preset value, or the indoor CO2 concentration value is greater than the first preset value and the indoor O2 concentration value is less than the second preset value, and the absolute value of the difference between the indoor temperature and the outdoor temperature is greater than the third preset value, the baffle 400 is rotated to the third position, and at this time the fresh air fan 300 can guide the outdoor fresh air into the shell 100 through the fresh air inlet 120 and guide the indoor air into the shell 100 through the indoor air inlet 110.

[0085] Further, when the air conditioner indoor unit 1 is turned off, the baffle 400 is in the first position.

[0086] That is, when the air conditioner indoor unit 1 is turned off, the baffle 400 blocks the fresh air inlet 120, so that when the air conditioner indoor unit 1 is not working, outdoor fresh air can be prevented from flowing into the shell 100 of the air conditioner indoor unit 1, and in turn the noise of the outdoor fresh air can be avoided, and the user experience is better.

[0087] Other configurations and operations of the air conditioner indoor unit 1 according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0088] The air conditioner indoor unit 1 in the present application performs a refrigeration cycle of the air conditioner indoor unit 1 by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been adjusted and heat-exchanged.

[0089] The compressor compresses the refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0090] The expansion valve expands the high-temperature and high-pressure state liquid phase refrigerant condensed in the condenser into a low-pressure liquid phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by exchanging heat with the material to be cooled using the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner indoor unit 1 can adjust the temperature and humidity of the indoor space.

[0091] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example.

[0092] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, alternatives, and variations can be made thereto without departing from the principles and spirit of the present application, the scope of which is defined by the claims and their equivalents.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: The housing is provided with an indoor air inlet, a fresh air inlet, an air outlet, and an air duct, wherein the air duct is connected to the indoor air inlet, the fresh air inlet, and the air outlet, respectively; A steam generating module is installed inside the housing to generate steam. The gas in the air duct passes through the steam generated by the steam generating module to form purified gas, which is discharged from the air outlet. A fresh air fan is installed in the air duct to guide outdoor air from the fresh air inlet to the air duct and to guide indoor air from the indoor air inlet to the air duct. The first sensor, installed in the housing, is used to detect the indoor CO2 concentration. The second sensor, installed in the housing, is used to detect the indoor O2 concentration. The third sensor, installed in the housing, is used to detect the indoor temperature; The fourth sensor is used to detect the outdoor temperature; The controller is installed inside the housing and is connected to the steam generating module, the fresh air module, the first sensor, the second sensor, the third sensor, and the fourth sensor, respectively. The controller is configured to, upon receiving a signal indicating that the steam air washing function is activated, control the steam generating module to generate steam, acquire the indoor CO2 concentration value detected by the first sensor and the indoor O2 concentration value detected by the second sensor, determine whether the indoor CO2 concentration value is not greater than a first preset value and whether the indoor O2 concentration value is not less than a second preset value, and if so, close the fresh air inlet and open the indoor air inlet, and operate the fresh air fan at a first speed to guide indoor air into the air duct; otherwise, open the fresh air inlet and control the fresh air fan to guide outdoor air into the air duct; and... The controller is further configured to, when receiving a signal to activate the steam air washing function and opening the fresh air inlet, acquire the indoor temperature detected by the third sensor and the outdoor temperature detected by the fourth sensor, determine whether the absolute value of the difference between the indoor temperature and the outdoor temperature is less than a third preset value, and if so, close the indoor air inlet and operate the fresh air fan at a second speed; otherwise, open the indoor air inlet and operate the fresh air fan at a third speed, controlling the operation of the fresh air fan to guide indoor and outdoor air into the air duct; The first rotational speed, the second rotational speed, and the third rotational speed decrease sequentially.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, When the steam air washing function is activated, the fresh air inlet is closed and the indoor air inlet is open, the fresh air fan operates at its highest speed and the steam generating module operates at its highest power.

3. The indoor unit of the air conditioner according to claim 1, characterized in that, When the steam air washing function is activated, the fresh air inlet and the indoor air inlet are both opened. At this time, the fresh air fan operates at the lowest speed, and the steam generating module operates at the lowest power.

4. The indoor unit of the air conditioner according to claim 1, characterized in that, When a signal indicating that the steam air cleaning function is activated is received; If the fresh air inlet is closed and the indoor air inlet is open, the steam generating module operates at the first power. If the fresh air inlet is open and the indoor air inlet is closed, the steam generating module operates at the second power. If the fresh air inlet is open and the indoor air inlet is open, the steam generating module operates at the third power. The first power, the second power, and the third power decrease sequentially.

5. The indoor unit of the air conditioner according to claim 1, characterized in that, The steam generating module includes: A base, which is mounted on the housing; A water tank is mounted on the base. A heating element, which is mounted on the base and extends into the water tank; A filter screen is installed in the water tank to cover the opening of the water tank.

6. The indoor unit of the air conditioner according to claim 1, characterized in that, The indoor air inlet and the fresh air inlet are located on the rear side of the housing and are at the same height.

7. The indoor unit of the air conditioner according to claim 1, characterized in that, Also includes: A baffle is rotatably mounted on the housing between a first position, a second position, and a third position. When the baffle is in the first position, it blocks the fresh air inlet and exposes the indoor air inlet. When the baffle is in the second position, it blocks the indoor air inlet and exposes the fresh air inlet. When the baffle is in the third position, it exposes both the indoor air inlet and the fresh air inlet.

8. The indoor unit of the air conditioner according to claim 7, characterized in that, When the indoor unit of the air conditioner is turned off, the baffle is in the first position.

Images