Indoor unit of air conditioner

Abstract

The invention relates to an indoor unit of an air conditioner. An indoor heat exchanger; a heat exchange fan; the steam generating device comprises an electric heating piece, and the electric heating piece is used for heating liquid to generate steam; the controller is configured as follows: when the indoor temperature is within a first preset range, the steam generation device is started, and the electric heating piece operates at first power to generate steam to heat and humidify indoor air; when the indoor temperature is lower than the lower limit value of the first preset range, the indoor heat exchanger serves as a condenser to operate for first preset time, the rotating speed of the heat exchange fan is increased, the steam generation device is started, the electric heating piece operates at second power to generate steam to heat and humidify indoor air, and the second power is larger than the first power; when the indoor temperature is higher than the upper limit value of the first preset range, the indoor heat exchanger stops running; and when the indoor formaldehyde concentration is higher than the first preset concentration, the outdoor air inlet is opened to introduce fresh air into a room, so that the formaldehyde release and formaldehyde removal effects are improved, and energy is saved.

Description

Technical Field

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

[0002] At present, with the improvement of people's quality of life and living standards, health has become an increasingly important factor in the family scene. For the home appliance market, more and more home appliances are developing around the theme of "health". Formaldehyde has become the number one killer affecting the health of family scenes, and more and more users are beginning to look for reliable and effective ways to remove formaldehyde. As a primary carcinogen, formaldehyde mainly exists in two forms indoors. The formaldehyde in furniture panels is bound formaldehyde, and the formaldehyde in indoor air is free formaldehyde. The bound formaldehyde in furniture panels will gradually be released into the air at room temperature, continuously increasing the content of free formaldehyde in the air, exacerbating the threat to human health. At present, there is no mature technology that can completely remove the formaldehyde contained in furniture panels in a short period of time.

[0003] An air conditioner generally includes an indoor unit and an outdoor unit. Some indoor units include an indoor heat exchanger, a heat exchange fan and a steam generator. The indoor heat exchanger is arranged inside the casing. The heat exchange fan is arranged inside the casing. The indoor air is introduced into the casing from the heat exchange air inlet through the operation of the heat exchange fan, and heat is exchanged through the indoor heat exchanger to form a heat exchange airflow. The heat exchange airflow is output to the room under the operation of the heat exchange fan. The steam generator is arranged inside the casing and is connected to the indoor air inlet and / or the outdoor air inlet. The steam generator includes an electric heater, which is used to heat the liquid to generate steam and release it outside the casing.

[0004] On the one hand, the high-temperature steam produced by the steam generator causes the metabolic activities of bacteria and virus cells in the air flow to disappear due to the high temperature, resulting in cell death; on the other hand, when dust, hair, and dust mites in the air come into contact with high-humidity air, the water vapor in the air will settle on them, further filtering the air and releasing the purified air flow outside the casing, thereby achieving an air purification effect.

[0005] However, the current method of removing formaldehyde through the air-conditioning indoor unit cannot distinguish between different indoor temperatures and whether there is someone indoors, and does not disclose the use of high-temperature steam generated by a steam generating device and an indoor heat exchanger to remove formaldehyde. At the same time, the existing method of removing formaldehyde in the air-conditioning indoor unit is to use a formaldehyde removal filter, and the efficiency of removing formaldehyde is low. Summary of the invention

[0006] The present invention solves one of the technical problems in the related art at least to a certain extent.

[0007] To this end, the present application aims to provide an air-conditioning indoor unit that can selectively implement formaldehyde removal logic at different indoor temperatures, thereby ensuring that the formaldehyde removal effect is optimal and energy-saving.

[0008] To achieve the above object, the present invention provides an air conditioner indoor unit, comprising:

[0009] A casing, wherein the casing is provided with an indoor air inlet and an outdoor air inlet;

[0010] An indoor heat exchanger, wherein the indoor heat exchanger is arranged inside the casing;

[0011] A heat exchange fan, the heat exchange fan is arranged inside the casing, and indoor air is introduced into the casing from a heat exchange air inlet through the operation of the heat exchange fan, and heat is exchanged through the indoor heat exchanger to form a heat exchange airflow, and the heat exchange airflow is output to the room under the operation of the heat exchange fan;

[0012] a steam generating device, disposed in the housing and connected to the indoor air inlet and / or the outdoor air inlet, the steam generating device comprising an electric heating element, the electric heating element being used to heat liquid to generate steam and release it to the outside of the housing;

[0013] The controller is configured to: when the indoor temperature is within a first preset range, turn on the steam generating device, and the electric heating element operates at a first power to generate steam to heat and humidify the indoor air;

[0014] When the indoor temperature is lower than the lower limit of the first preset range, the indoor heat exchanger is used as a condenser to operate for a first preset time, the speed of the heat exchange fan is increased, the steam generating device is turned on, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air, and the second power is greater than the first power;

[0015] When the indoor temperature is higher than the upper limit of the first preset range, the indoor heat exchanger stops operating;

[0016] When the indoor formaldehyde concentration is higher than a first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room.

[0017] In the technical solution, after the formaldehyde removal mode is turned on, the air-conditioning indoor unit can selectively implement formaldehyde removal logic at different indoor temperatures, thereby ensuring that the formaldehyde removal effect is optimal and energy-saving.

[0018] In some embodiments of the present application, the first preset range includes a first range and a second range, and the lower limit value of the first range is higher than the upper limit value of the second range;

[0019] When the indoor temperature is within the second range, the indoor heat exchanger is used as a condenser to operate for a second preset time, the speed of the heat exchange fan is increased, the steam generating device is turned on, and the electric heating element operates at a first power to generate steam to heat and humidify the indoor air.

[0020] In some embodiments of the present application, when the indoor temperature is higher than an upper limit of a first preset range, detecting whether the indoor humidity is higher than a first preset humidity;

[0021] When the indoor humidity is higher than the first preset humidity, the steam generating device stops operating.

[0022] In some embodiments of the present application, when the indoor humidity is higher than a first preset humidity, the indoor formaldehyde concentration is detected;

[0023] When the indoor formaldehyde concentration is higher than a first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room.

[0024] In some embodiments of the present application, when the indoor temperature is higher than the upper limit of a first preset range and the indoor humidity is detected to be no higher than a first preset humidity, the steam generating device is started and the electric heating element is operated at a first power to generate steam to heat and humidify the indoor air.

[0025] In some embodiments of the present application, when the indoor formaldehyde concentration is higher than a first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room;

[0026] When the indoor formaldehyde concentration is lower than a second preset concentration, the outdoor air inlet is closed and the indoor air inlet is opened.

[0027] On the other hand, the present application also provides an air conditioner indoor unit, comprising:

[0028] A casing, wherein the casing is provided with an indoor air inlet and an outdoor air inlet;

[0029] An indoor heat exchanger, wherein the indoor heat exchanger is arranged inside the casing;

[0030] A heat exchange fan, the heat exchange fan is arranged inside the casing, and indoor air is introduced into the casing from a heat exchange air inlet through the operation of the heat exchange fan, and heat is exchanged through the indoor heat exchanger to form a heat exchange airflow, and the heat exchange airflow is output to the room under the operation of the heat exchange fan;

[0031] a steam generating device, disposed in the housing and connected to the indoor air inlet and / or the outdoor air inlet, the steam generating device comprising an electric heating element, the electric heating element being used to heat liquid to generate steam and release it to the outside of the housing;

[0032] Human sensor, which is used to detect whether there is someone in the room;

[0033] The controller is configured as:

[0034] When it is detected that there is someone in the room, the steam generating device is turned on, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air;

[0035] After the electric heating element operates at the second power for a third preset time, the steam generating device is stopped and the outdoor air inlet is opened to introduce fresh air into the room.

[0036] In some embodiments of the present application, when it is detected that someone is indoors, the outdoor air inlet is opened for a fourth preset time, and then the outdoor air inlet is closed and the indoor air inlet is opened. The electric heating element operates at a second power to generate steam to heat and humidify the indoor air.

[0037] In some embodiments of the present application, when it is detected that no one is in the room, the indoor heat exchanger stops running, the heat exchange fan is turned on at a first speed and runs for a first time, and then the indoor formaldehyde concentration is detected;

[0038] When it is detected that the indoor formaldehyde concentration is higher than the set amplitude of the initial indoor formaldehyde concentration, the rotation speed of the heat exchange fan is increased.

[0039] In some embodiments of the present application, when it is detected that no one is in the room, the indoor heat exchanger stops running, the heat exchange fan is turned on at a first speed and runs for a first time, and then the indoor formaldehyde concentration is detected;

[0040] When it is detected that the indoor formaldehyde concentration is not higher than the set amplitude of the initial indoor formaldehyde concentration, the heat exchange fan operates at the first speed.

[0041] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic diagram of the casing structure of an air-conditioning indoor unit according to an embodiment of the present application;

[0043] Figure 2 is a schematic diagram of the position of the indoor air inlet of the indoor unit of the air conditioner according to the embodiment of the present application;

[0044] Figure 3 yes Figure 2 Sectional view along AA direction;

[0045] Figure 4is a side view of a casing of an indoor unit of an air conditioner according to an embodiment of the present application;

[0046] Figure 5 It is a cross-sectional view taken along the line BB in Figure B;

[0047] Figure 6 is a schematic diagram of the installation position of the water storage tank of the indoor unit of the air conditioner according to the implementation mode of the present application;

[0048] Figure 7 is a schematic diagram of the installation position of the steam generating device of the indoor unit of the air conditioner according to the embodiment of the present application;

[0049] Figure 8 is a schematic diagram of the installation position of the electric heating element of the indoor unit of the air conditioner according to the embodiment of the present application;

[0050] Fig. 9 It is a schematic diagram of the positions of the electric heating element and the water storage tank of the indoor unit of the air conditioner according to the embodiment of the present application;

[0051] Fig.10 The formaldehyde removal process of the indoor unit of the air conditioner when no one is indoors according to the embodiment of the present application Figure 1 ;

[0052] Fig.11 The formaldehyde removal process of the indoor unit of the air conditioner when no one is indoors according to the embodiment of the present application Figure 2 ;

[0053] Fig.12 The formaldehyde removal process of the indoor unit of the air conditioner when no one is indoors according to the embodiment of the present application Figure 3 ;

[0054] Fig.13 The formaldehyde removal process of the indoor unit of the air conditioner when no one is indoors according to the embodiment of the present application Figure 4 ;

[0055] Fig.14 The formaldehyde removal process of the indoor unit of the air conditioner when no one is indoors according to the embodiment of the present application Figure 5 ;

[0056] Fig.15 The formaldehyde removal process of the indoor unit of the air conditioner when no one is indoors according to the embodiment of the present application Figure 6 ;

[0057] Fig.16 The formaldehyde removal process of the indoor unit of the air conditioner when no one is indoors according to the embodiment of the present application Figure 7 ;

[0058] Fig.17 The formaldehyde removal process of the indoor unit of the air conditioner when no one is indoors according to the embodiment of the present application Figure 8 ;

[0059] Fig.18 The formaldehyde removal process of the indoor unit of the air conditioner when no one is indoors according to the embodiment of the present application Figure 9 ;

[0060] Fig.19 The formaldehyde removal process of the indoor unit of the air conditioner when no one is indoors according to the embodiment of the present application Figure 10 ;

[0061] Fig. 20 The formaldehyde removal process of the indoor unit of the air conditioner when no one is indoors according to the embodiment of the present application Figure 10 one;

[0062] Fig.21 This is a formaldehyde removal flow chart of an air-conditioning indoor unit when there is someone indoors according to the implementation mode of the present application.

[0063] In the above figures: casing 1; steam generating device 2; electric heating element 3; water storage tank 4; indoor air inlet 5; outdoor air inlet 6; baffle 7. DETAILED DESCRIPTION

[0064] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0065] In the present application, the air conditioner includes an air conditioner indoor unit and an air conditioner outdoor unit. When the air conditioner operates in a cooling mode, the air conditioner performs a refrigeration cycle of the air conditioner indoor unit by using a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger.

[0066] The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air, provides cooling to the indoor space through the heat absorption process of the refrigerant, and achieves temperature regulation of the indoor space.

[0067] The compressor compresses the low-temperature and low-pressure refrigerant gas and discharges the high-temperature and high-pressure refrigerant gas, which flows into the outdoor heat exchanger (condenser). The outdoor heat exchanger condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0068] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the outdoor heat exchanger into a low-pressure liquid-phase refrigerant.

[0069] The indoor heat exchanger 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 indoor heat exchanger can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the indoor air.

[0070] During the entire refrigeration cycle, the air conditioner indoor unit can adjust the temperature of the indoor space.

[0071] When the air conditioner operates in heating mode, the air conditioner performs a heating cycle of the air conditioner indoor unit through the compressor, outdoor heat exchanger, expansion valve and indoor heat exchanger.

[0072] The heating cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air, provides heat to the indoor space through the heat release process of the refrigerant, and realizes temperature regulation of the indoor space.

[0073] The compressor compresses the low-temperature and low-pressure refrigerant gas and discharges the high-temperature and high-pressure refrigerant gas, which flows into the indoor heat exchanger. The indoor heat exchanger condenses the compressed refrigerant into a liquid phase, and the heat generated by the condensation is exchanged with the indoor air flowing through the indoor heat exchanger, thereby increasing the indoor temperature.

[0074] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the outdoor heat exchanger into a low-pressure liquid-phase refrigerant.

[0075] The outdoor heat exchanger 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 outdoor heat exchanger may perform heat exchange with outdoor air by utilizing latent heat of evaporation of the refrigerant.

[0076] Throughout the heating cycle, the air conditioner indoor unit regulates the temperature of the indoor space.

[0077] The air conditioner outdoor unit includes at least a compressor and an outdoor heat exchanger, the air conditioner indoor unit includes at least an indoor heat exchanger, and the expansion valve may be provided in the air conditioner indoor unit or the air conditioner outdoor unit.

[0078] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner indoor unit functions as a heater in a heating mode, and when the indoor heat exchanger functions as an indoor heat exchanger, the air conditioner indoor unit functions as a cooler in a cooling mode.

[0079] As attached Figures 1 to 9 As shown, in one embodiment of the air-conditioning indoor unit of the present invention, the air-conditioning includes an air-conditioning indoor unit and an air-conditioning outdoor unit, the air-conditioning outdoor unit includes a compressor and an outdoor heat exchanger, the air-conditioning indoor unit includes an indoor heat exchanger, and the expansion valve can be arranged in the air-conditioning indoor unit or the air-conditioning outdoor unit.

[0080] The air conditioner of the present application includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, an expansion valve, and a pipeline for circulating refrigerant, wherein the indoor heat exchanger and the outdoor heat exchanger are both connected to the compressor. The expansion valve is an electronic expansion valve, which is connected between the indoor heat exchanger and the outdoor heat exchanger and can expand the liquid refrigerant that has undergone a condensation process into a low-pressure liquid refrigerant.

[0081] The compressor includes an air intake port and an air exhaust port. The refrigerant that absorbs heat and undergoes an evaporation process enters the compressor from the air intake port. The compressor compresses the gaseous refrigerant into a high-temperature and high-pressure state and then discharges it from the exhaust port.

[0082] The indoor heat exchanger and the outdoor heat exchanger are respectively connected to the compressor through a four-way valve in the refrigerant circuit, and the four-way valve includes a first valve port, a second valve port, a third valve port and a fourth valve port. Among them, the air intake port of the compressor is fixedly connected to the first valve port, and the air discharge port of the compressor is fixedly connected to the third valve port.

[0083] In the refrigerant circuit, the refrigerant can circulate through the compressor, indoor heat exchanger, expansion valve, and outdoor heat exchanger in sequence.

[0084] When the air conditioner is in cooling mode, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port. When the air conditioner is in heating mode, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port.

[0085] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0086] As attached Figures 1 to 9 As shown, in an exemplary embodiment of the air conditioner indoor unit of the present invention, the air conditioner indoor unit comprises: a casing 1, an indoor heat exchanger, a heat exchange fan, a steam generating device 2, a temperature sensor, a humidity sensor and a controller. Among them, the casing 1 is provided with an indoor air inlet and an outdoor air inlet; the indoor heat exchanger is arranged inside the casing 1; the heat exchange fan is arranged inside the casing 1, and the airflow outside the casing 1 is introduced into the casing 1 through the heat exchange inlet through the operation of the heat exchange fan, and heat exchanged through the indoor heat exchanger to form a heat exchange airflow, and the heat exchange airflow is output to the room under the operation of the heat exchange fan; the heat exchange air inlet is arranged on the casing, and the heat exchange air inlet is connected to the indoor space. The steam generating device 2 is arranged in the casing 1 and is connected to the indoor air inlet and / or the outdoor air inlet.

[0087] The steam generating device 2 includes a water tank 4 and an electric heating element 3. The electric heating element is arranged below the water tank 4. Liquid is stored in the water tank 4. The liquid flows through the electric heating element 3. The electric heating element 3 is used to heat the liquid to generate high-temperature steam and release it to the outside of the casing 1.

[0088] The temperature sensor and the humidity sensor are arranged at the indoor air inlet or the heat exchange air inlet to detect the indoor temperature and indoor humidity.

[0089] The controller controls the electric heating element in the steam generating device 2 to start running. Since the steam generating device 2 is connected to the indoor air inlet and / or the outdoor air inlet, the indoor air can be introduced into the steam generating device 2 through the indoor air inlet, or the outdoor air can be introduced into the steam generating device 2 through the outdoor air inlet, or the indoor air and the outdoor air can be introduced into the steam generating device 2 together, so that the electric heating element 3 in the steam generating device 2 heats the liquid to generate high-temperature steam, which then contacts the introduced airflow. On the one hand, the metabolic activities of the bacteria and virus cells in the airflow disappear due to the high temperature, and the cells die; on the other hand, when the dust, hair, and dust mites in the air contact with the high-humidity air, the water vapor in the air will precipitate them and further filter the air, so that the purified airflow is released outside the casing 1, thereby achieving an air purification effect.

[0090] A first fan is also provided in the casing, and the first fan is used to drive and guide the air introduced from the indoor air inlet and / or the outdoor air inlet to the indoor space outside the casing. Thus, the high-temperature and high-humidity gas generated by the steam generating device can be driven and guided to the indoor space outside the casing by the first fan.

[0091] Reference Figure 10-Figure 16 The controller is configured to: when the indoor temperature is within a first preset range, turn on the steam generating device, and operate the electric heating element at a first power to generate steam to heat and humidify the indoor air.

[0092] When the indoor temperature is lower than the lower limit of the first preset range, the indoor heat exchanger is used as a condenser to operate for a first preset time, the speed of the heat exchange fan increases, the steam generating device is turned on, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air, and the second power is greater than the first power.

[0093] When the indoor temperature is higher than the upper limit of the first preset range, the indoor heat exchanger stops operating.

[0094] When the indoor formaldehyde concentration is higher than a first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room.

[0095] Through the above scheme, after the formaldehyde removal mode is turned on, the air-conditioning indoor unit can selectively implement formaldehyde removal logic at different indoor temperatures, thereby ensuring that the formaldehyde removal effect is optimal and energy-saving.

[0096] The air conditioner indoor unit also includes a human sensor and a formaldehyde concentration sensor. The human sensor is used to detect whether there is someone in the room, and the formaldehyde concentration sensor is used to detect the indoor formaldehyde concentration.

[0097] When the controller of the air conditioner indoor unit receives the formaldehyde removal command, the infrared human sensor turns on to detect whether there is anyone in the room.

[0098] Reference Figure 10-Figure 20 When the human sensor detects that there is no one in the room, the indoor heat exchanger stops running and the heat exchange fan starts running at the first speed to disturb the indoor air, increase the air flow rate between the indoor air and the furniture surface, and then promote the release of formaldehyde in the furniture and home decoration into the indoor air.

[0099] After the heat exchange fan is turned on for the first time, the indoor formaldehyde concentration is detected. When the indoor formaldehyde concentration is detected to be not higher than the set amplitude of the initial indoor formaldehyde concentration, the heat exchange fan continues to run at the first speed. When the indoor formaldehyde concentration is detected to be higher than the set amplitude of the initial indoor formaldehyde concentration, the speed of the heat exchange fan is increased, thereby quickly disturbing the indoor air.

[0100] In some embodiments, after the controller of the air conditioner indoor unit receives the formaldehyde removal command, the formaldehyde concentration sensor detects the initial indoor formaldehyde concentration at this time, and the set amplitude of the initial indoor formaldehyde concentration can be set to a multiple of the initial indoor formaldehyde concentration. It can be set that the set amplitude of the initial indoor formaldehyde concentration is twice the initial indoor formaldehyde concentration. That is, when the indoor formaldehyde concentration is detected to be higher than twice the initial indoor formaldehyde concentration, it means that the furniture and home furnishings have released a large amount of formaldehyde into the indoor air. At this time, increasing the speed of the heat exchange fan can quickly disturb the indoor air. Specifically, the heat exchange fan is increased from the first speed to the second speed, and the second speed is higher than the first speed, so as to improve the flow of indoor air and promote the release of formaldehyde.

[0101] When the heat exchange fan is increased from the first speed to the second speed, the indoor temperature and indoor humidity are detected.

[0102] When the indoor temperature is within the first preset range, the steam generating device is turned on, and the electric heating element operates at the first power to generate steam to heat and humidify the indoor air. It can be set that when the difference between the upper limit value of the first preset range and the real-time indoor temperature is between 3°C and 10°C, the real-time indoor temperature at this time is within the first preset range.

[0103] When the indoor temperature is lower than the lower limit of the first preset range, the indoor heat exchanger is used as a condenser to operate for the first preset time, the speed of the heat exchange fan is increased, the steam generating device is turned on, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air.

[0104] The second power is greater than the first power. It can be set that the second power is set to the rated power of the electric heating element, and the first power is set to 80% of the rated power.

[0105] When the indoor temperature is higher than the upper limit of the first preset range, the formaldehyde in the indoor furniture and furnishings can be quickly released into the indoor air. The upper limit of the first preset range can be set by the user, or can be preset by the air conditioner at the factory, or sent from the cloud.

[0106] The first preset range includes a first range and a second range, and a lower limit value of the first range is higher than an upper limit value of the second range.

[0107] When the indoor temperature is within the first range, it means that the indoor temperature is closer to the upper limit of the first preset range. At this time, the steam generator is turned on, and the electric heating element of the steam generator operates at a lower first power. The speed of the first fan increases, and the temperature of the high-temperature and high-humidity steam generated by the steam generator is higher, and the amount of steam generated is larger. The high-temperature and high-humidity steam is driven by the first fan and discharged into the indoor space outside the casing. When the high-temperature steam heats and humidifies the indoor air, the formaldehyde inside the furniture can be quickly released, thereby increasing the release rate of formaldehyde in the furniture. It can be set that when the difference between the upper limit of the first preset range and the real-time indoor temperature is between 3°C and 5°C, the real-time indoor temperature is within the first range.

[0108] When it is detected that the indoor formaldehyde concentration is higher than a first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room.

[0109] The first preset concentration is the concentration when the release of formaldehyde reaches a balanced state. It can be set that when the indoor formaldehyde concentration is higher than the first preset concentration, the indoor formaldehyde concentration fluctuation range within the set time does not exceed the preset fluctuation range. The preset fluctuation range can be set to 0.001 mg / m 3 .

[0110] In some embodiments, the indoor air inlet and the outdoor air inlet are arranged adjacent to each other, and a baffle is further arranged on the housing, and the baffle is rotatably connected to the housing. The baffle can be rotated to cooperate with the indoor air inlet to close the indoor air inlet or rotated to cooperate with the outdoor air inlet to close the outdoor air inlet. The baffle can also partially close the indoor air inlet or partially close the outdoor air inlet.

[0111] When it is detected that the indoor formaldehyde concentration is higher than the first preset concentration, it means that the indoor formaldehyde concentration is relatively high. The baffle rotates to cooperate with the indoor air inlet to close the indoor air inlet, so that the outdoor air inlet is open, and fresh air is introduced into the room by opening the outdoor air inlet. The fresh air enters the casing from the outdoor air inlet, and is discharged into the indoor space outside the casing after passing through the steam generating device. The fresh air dilutes the higher concentration of formaldehyde in the room, and the indoor formaldehyde can be discharged to the outside through gaps such as door gaps.

[0112] When the indoor temperature is within the second range, the indoor heat exchanger is used as a condenser to run for a second preset time, which can be set to thirty minutes. The speed of the heat exchange fan increases, the steam generating device is turned on, and the electric heating element operates at the first power to generate steam to heat and humidify the indoor air. The speed of the first fan increases, and the temperature of the high-temperature and high-humidity steam generated by the steam generating device is higher, and the amount of steam generated is larger. The high-temperature and high-humidity steam is driven by the first fan and discharged into the indoor space outside the casing. When the high-temperature steam heats and humidifies the indoor air, the formaldehyde inside the furniture can be quickly released, thereby increasing the release rate of formaldehyde in the furniture. It can be set that when the difference between the upper limit value of the first preset range and the real-time indoor temperature is between 5°C and 10°C, the real-time indoor temperature at this time is within the second range.

[0113] When it is detected that the indoor formaldehyde concentration is higher than the first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room. The fresh air enters the casing through the outdoor air inlet, and is discharged into the indoor space outside the casing after passing through the steam generating device. The fresh air dilutes the high concentration of formaldehyde in the room, and the indoor formaldehyde can be discharged to the outside through gaps such as door gaps.

[0114] The first preset concentration is the concentration when the release of formaldehyde reaches a balanced state. It can be set that when the indoor formaldehyde concentration is higher than the first preset concentration, the indoor formaldehyde concentration fluctuation range within the set time does not exceed the preset fluctuation range. The preset fluctuation range can be set to 0.001 mg / m 3 .

[0115] When the indoor temperature is lower than the lower limit of the first preset range, the indoor heat exchanger is used as a condenser to run for a first preset time, and the duration of the first preset time is greater than the duration of the second preset time. The first preset time can be set to fifty minutes. The speed of the heat exchange fan increases, the steam generating device is turned on, and the electric heating element operates at the second power to generate steam to heat and humidify the indoor air. The second power can be set to the rated power. The speed of the first fan increases, and the temperature of the high-temperature and high-humidity steam generated by the steam generating device is higher, and the amount of steam generated is larger. The high-temperature and high-humidity steam is driven by the first fan and discharged into the indoor space outside the casing. When the high-temperature steam heats and humidifies the indoor air, the formaldehyde inside the furniture can be quickly released, thereby increasing the release rate of formaldehyde in the furniture. It can be set that when the difference between the upper limit of the first preset range and the real-time indoor temperature is greater than 10°C, the real-time indoor temperature at this time is lower than the lower limit of the first preset range.

[0116] When it is detected that the indoor formaldehyde concentration is higher than the first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room. The fresh air enters the casing through the outdoor air inlet, and is discharged into the indoor space outside the casing after passing through the steam generating device. The fresh air dilutes the high concentration of formaldehyde in the room, and the indoor formaldehyde can be discharged to the outside through gaps such as door gaps.

[0117] The first preset concentration is the concentration when the release of formaldehyde reaches a balanced state. It can be set that when the indoor formaldehyde concentration is higher than the first preset concentration, the indoor formaldehyde concentration fluctuation range within the set time does not exceed the preset fluctuation range. The preset fluctuation range can be set to 0.001 mg / m 3 .

[0118] When the indoor temperature is higher than the upper limit of the first preset range, the indoor heat exchanger stops running and detects whether the indoor humidity is higher than the first preset humidity. When the indoor humidity is higher than the first preset humidity, it means that the indoor temperature and indoor humidity can promote the release of formaldehyde in furniture and home furnishings into the indoor air. At this time, there is no need to heat and humidify the indoor air, and the steam generating device can be stopped, that is, the electric heating element can be stopped, thereby saving energy consumption.

[0119] When the indoor temperature is higher than the upper limit of the first preset range and the indoor humidity is higher than the first preset humidity, the indoor formaldehyde concentration is detected. When the indoor formaldehyde concentration is higher than the first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room. At this time, the baffle rotates to close the indoor air inlet and open the outdoor air inlet. Fresh air enters the casing from the outdoor air inlet, passes through the steam generating device and is discharged into the indoor space outside the casing. The fresh air dilutes the higher concentration of formaldehyde in the room, and the indoor formaldehyde can be discharged to the outside through gaps such as door gaps.

[0120] The first preset concentration is set to the concentration when the release of formaldehyde reaches a balanced state. It can be set that when the indoor formaldehyde concentration is higher than the first preset concentration, the indoor formaldehyde concentration fluctuation range within the set time does not exceed the preset fluctuation range. The preset fluctuation range can be set to 0.001 mg / m 3 .

[0121] When the indoor temperature is higher than the upper limit of the first preset range and the indoor humidity is detected to be not higher than the first preset humidity, the steam generating device is turned on and the electric heating element is operated at the first power to generate steam to heat and humidify the indoor air. The speed of the first fan increases, and the temperature of the high-temperature and high-humidity steam generated by the steam generating device is higher, and the amount of steam generated is larger. The high-temperature and high-humidity steam is driven by the first fan and discharged into the indoor space outside the casing. When the high-temperature steam heats and humidifies the indoor air, the formaldehyde inside the furniture can be quickly released, thereby increasing the release rate of formaldehyde in the furniture.

[0122] When it is detected that the indoor formaldehyde concentration is higher than the first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room. The fresh air enters the casing through the outdoor air inlet, and is discharged into the indoor space outside the casing after passing through the steam generating device. The fresh air dilutes the high concentration of formaldehyde in the room, and the indoor formaldehyde can be discharged to the outside through gaps such as door gaps.

[0123] When the indoor formaldehyde concentration is lower than the second preset concentration, the baffle rotates to close the outdoor air inlet and open the indoor air inlet. The second preset concentration can be set to a safe concentration of formaldehyde, which can be a national safety standard value of formaldehyde. When the indoor formaldehyde concentration is lower than the second preset concentration, the indoor formaldehyde concentration is within the safe concentration range for the human body, so the fresh air can be closed and the indoor air inlet can be opened to carry out the next formaldehyde removal cycle.

[0124] Reference Fig.21 In some embodiments, when the human sensing sensor detects that there is someone in the room, the user turns on the formaldehyde removal function to perform a formaldehyde removal cycle, the steam generating device is turned on, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air.

[0125] After the electric heating element operates at the second power for a third preset time, the steam generating device is stopped, and the outdoor air inlet is opened to introduce fresh air into the room, thereby ensuring that when someone is indoors, fresh air is introduced in time to dilute the indoor formaldehyde concentration, thereby preventing people from being harmed in an environment with a high indoor formaldehyde concentration. The third preset time is greater than the first preset time, and the third preset time can be set to ninety minutes.

[0126] When it is detected that there is someone in the room, after the outdoor air inlet is opened for the fourth preset time, the outdoor air inlet is closed, the indoor air inlet is opened, and the electric heating element is operated at the second power to generate steam to heat and humidify the indoor air. Among them, the fourth preset time can be the same as the value of the third preset time. The indoor formaldehyde concentration is diluted by introducing fresh air into the room for a long time. After the fourth preset time, the indoor formaldehyde concentration is already low. At this time, the outdoor air inlet is closed, the indoor air inlet is opened, and the electric heating element is used to heat and humidify the liquid to generate steam, so that the room is in a high temperature and high humidity environment to promote the release of formaldehyde in the furniture, and achieve the effect of cyclic formaldehyde removal.

[0127] In some embodiments, the air conditioner further includes an air conditioner indoor unit and an air conditioner outdoor unit. The air conditioner outdoor unit is provided with an outdoor heat exchanger. Refrigerant flows between the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange.

[0128] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0129] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0130] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0131] In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0132] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0133] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An air conditioner indoor unit, characterized in that: It includes: A casing, wherein the casing is provided with an indoor air inlet and an outdoor air inlet; An indoor heat exchanger, wherein the indoor heat exchanger is arranged inside the casing; A heat exchange fan, the heat exchange fan is arranged inside the casing, and indoor air is introduced into the casing from a heat exchange air inlet through the operation of the heat exchange fan, and heat is exchanged through the indoor heat exchanger to form a heat exchange airflow, and the heat exchange airflow is output to the room under the operation of the heat exchange fan; a steam generating device, disposed in the housing and connected to the indoor air inlet and / or the outdoor air inlet, the steam generating device comprising an electric heating element, the electric heating element being used to heat liquid to generate steam and release it to the outside of the housing; The controller is configured to: when the indoor temperature is within a first preset range, turn on the steam generating device, and the electric heating element operates at a first power to generate steam to heat and humidify the indoor air; When the indoor temperature is lower than the lower limit of the first preset range, the indoor heat exchanger is used as a condenser to operate for a first preset time, the speed of the heat exchange fan is increased, the steam generating device is turned on, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air, and the second power is greater than the first power; When the indoor temperature is higher than the upper limit of the first preset range, the indoor heat exchanger stops operating; When the indoor formaldehyde concentration is higher than a first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room.

2. The air conditioner indoor unit according to claim 1, characterized in that: The first preset range includes a first range and a second range, and the lower limit value of the first range is higher than the upper limit value of the second range; When the indoor temperature is within the second range, the indoor heat exchanger is used as a condenser to operate for a second preset time, the speed of the heat exchange fan is increased, the steam generating device is turned on, and the electric heating element operates at a first power to generate steam to heat and humidify the indoor air.

3. The air conditioner indoor unit according to claim 1, characterized in that: When the indoor temperature is higher than the upper limit of the first preset range, detecting whether the indoor humidity is higher than the first preset humidity; When the indoor humidity is higher than the first preset humidity, the steam generating device stops operating.

4. The air conditioner indoor unit according to claim 3, characterized in that: When the indoor humidity is higher than the first preset humidity, detecting the indoor formaldehyde concentration; When the indoor formaldehyde concentration is higher than a first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room.

5. The air conditioner indoor unit according to claim 3, characterized in that: When the indoor temperature is higher than the upper limit of the first preset range and the indoor humidity is detected to be not higher than the first preset humidity, the steam generating device is turned on and the electric heating element is operated at a first power to generate steam to heat and humidify the indoor air.

6. The air conditioner indoor unit according to claim 5, characterized in that: When the indoor formaldehyde concentration is higher than a first preset concentration, opening the outdoor air inlet to introduce fresh air into the room; When the indoor formaldehyde concentration is lower than a second preset concentration, the outdoor air inlet is closed and the indoor air inlet is opened.

7. An air conditioner indoor unit, characterized in that: include: A casing, wherein the casing is provided with an indoor air inlet and an outdoor air inlet; An indoor heat exchanger, wherein the indoor heat exchanger is arranged inside the casing; A heat exchange fan, the heat exchange fan is arranged inside the casing, and indoor air is introduced into the casing from a heat exchange air inlet through the operation of the heat exchange fan, and heat is exchanged through the indoor heat exchanger to form a heat exchange airflow, and the heat exchange airflow is output to the room under the operation of the heat exchange fan; a steam generating device, disposed in the housing and connected to the indoor air inlet and / or the outdoor air inlet, the steam generating device comprising an electric heating element, the electric heating element being used to heat liquid to generate steam and release it to the outside of the housing; Human sensor, which is used to detect whether there is someone in the room; The controller is configured as: When it is detected that there is someone in the room, the steam generating device is turned on, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air; After the electric heating element operates at the second power for a third preset time, the steam generating device is stopped and the outdoor air inlet is opened to introduce fresh air into the room.

8. The air conditioner indoor unit according to claim 7, characterized in that: When it is detected that there is someone in the room, after the outdoor air inlet is opened for a fourth preset time, the outdoor air inlet is closed, and the indoor air inlet is opened, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air.

9. The air conditioner indoor unit according to claim 7, characterized in that: When it is detected that no one is in the room, the indoor heat exchanger stops running, the heat exchange fan starts running at a first speed for a first time, and then the indoor formaldehyde concentration is detected; When it is detected that the indoor formaldehyde concentration is higher than the set amplitude of the initial indoor formaldehyde concentration, the rotation speed of the heat exchange fan is increased.

10. The air conditioner indoor unit according to claim 9, characterized in that: When it is detected that the indoor formaldehyde concentration is not higher than the set amplitude of the initial indoor formaldehyde concentration, the heat exchange fan operates at the first speed.

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