An air conditioner indoor unit

Abstract

The application relates to the technical field of household electrical appliances, and particularly relates to an air conditioner indoor unit. The air conditioner indoor unit comprises a casing, a casing fresh air inlet, a casing fresh air outlet, a fresh air volute, a fresh air fan, a humidifying module, an internal circulation air inlet and a control valve. The humidifying module comprises a steam outlet, the steam outlet is arranged in correspondence with the casing fresh air outlet, so that steam is blown out through the steam outlet and the casing fresh air outlet; the internal circulation air inlet is in communication with the volute fresh air inlet; the control valve is movably arranged on the casing; and the control valve is configured to open one of the casing fresh air inlet and the internal circulation air inlet. The application can conveniently switch between the fresh air introduction mode and the indoor air internal circulation mode through the control valve: when fresh air is needed, the casing fresh air inlet is opened to introduce outdoor fresh air; when fresh air is not needed or the outdoor air quality is poor, the casing fresh air inlet is closed and the internal circulation air inlet is opened, so that the steam condensation phenomenon is effectively reduced.

Description

Technical Field

[0001] This application relates to the field of home appliance technology, and more particularly to an indoor unit of an air conditioner. Background Technology

[0002] An air conditioner, or air conditioner, is a device used to regulate and control indoor environmental parameters (such as temperature, humidity, cleanliness, and airflow) to meet people's needs for a comfortable indoor environment or the requirements of specific processes.

[0003] During air conditioning operation, whether in cooling or heating mode, indoor air humidity may decrease, causing people to feel dry and uncomfortable, and potentially leading to problems such as dry skin and respiratory illnesses. The air conditioner's fresh air module uses a fresh air fan to draw fresh outdoor air into the room, while simultaneously using an exhaust fan to expel stale indoor air to the outside, thus completing the exchange of indoor and outdoor air and the delivery of fresh air.

[0004] In related technologies, air conditioners are equipped with a steam humidification module, which delivers water vapor into the room to increase indoor air humidity and improve indoor comfort. However, users often use the steam humidification function in winter when the air is dry. In winter, the outdoor fresh air temperature is low. When the fresh air and steam humidification functions are turned on at the same time, the temperature difference between the low outdoor fresh air and the humidified indoor air can easily cause condensation to accumulate at the air conditioner's air outlet. Utility Model Content

[0005] This application discloses an indoor air conditioning unit that can effectively reduce steam condensation and ensure stable operation and air output.

[0006] To achieve the above objectives, this application discloses an indoor air conditioning unit, comprising: a casing, a casing fresh air inlet, and a casing fresh air outlet, wherein the casing fresh air inlet and the casing fresh air outlet are formed on the casing; The housing is provided with a fresh air volute, and the fresh air volute is also provided with a volute fresh air inlet and a volute fresh air outlet, and the housing fresh air inlet is connected to the volute fresh air inlet; A fresh air fan is installed inside the fresh air volute. The fresh air fan rotates to drive fresh air into the fresh air volute from the fresh air inlet of the casing and the fresh air inlet of the volute, and blows it into the room through the fresh air outlet of the volute and the fresh air outlet of the casing. A humidification module, comprising: a humidifier disposed within the housing for generating steam; A steam outlet is provided, which is connected to the humidifier to deliver steam into the room. The steam outlet is also provided in correspondence with the fresh air outlet of the casing, so that the steam is blown out through the steam outlet and the fresh air outlet of the casing. An internal circulation air inlet is formed on the casing. The internal circulation air inlet is connected to the fresh air inlet of the volute. The fresh air fan rotates to drive indoor air from the internal circulation air inlet and the fresh air inlet of the volute into the volute, and blows it into the room through the fresh air outlet of the volute and the fresh air outlet of the casing. A control valve is movably mounted on the housing and is configured to open one of the housing's fresh air inlet and the internal circulation air inlet.

[0007] Thus, when the outdoor temperature is low in winter, if the humidification module is running, the internal circulation air inlet can be opened. At this time, the indoor air draws the steam out. Compared with the low-temperature outdoor fresh air, the indoor air temperature is higher, which can avoid the low-temperature fresh air from directly contacting the steam, effectively reducing the phenomenon of steam condensation, and ensuring the stable operation of the equipment and the air output effect.

[0008] This application also provides an air conditioner indoor unit, the casing of which includes a rear side panel, the volute fresh air inlet is disposed facing the rear side panel, the casing fresh air inlet and the internal circulation air inlet are both disposed on the rear side panel, and along the width direction of the air conditioner indoor unit, the casing fresh air inlet and the internal circulation air inlet both overlap with the volute fresh air inlet.

[0009] In this way, since the fresh air inlet and the internal circulation air inlet of the casing overlap with the fresh air inlet of the volute along the width direction, air can directly enter the volute without changing its flow direction after entering from the inlet, minimizing the airflow path. This avoids wind resistance loss caused by the bend in the airflow path, reduces the additional energy consumption of the fresh air fan, and ensures a more stable airflow in both modes, avoiding the problem of airflow attenuation caused by wind resistance.

[0010] This application also provides an air conditioning indoor unit, wherein the control valve includes: An electric motor, which is mounted on the rear side plate; A baffle is rotatably mounted on the output end of the motor, and the outer circumferential dimension of the baffle is greater than or equal to the dimension of the fresh air inlet of the housing and the dimension of the internal circulation air inlet.

[0011] In this way, the outer circumference of the baffle is greater than or equal to the size of two inlets. When the baffle is rotated to any inlet position, it can completely block the inlet, effectively avoiding the problem of outdoor air mixing with indoor air in fresh air mode or indoor air leakage to the outside in recirculation mode. For example, when recirculating humidification in winter, it can completely block the entry of low-temperature outdoor fresh air, ensuring that indoor air efficiently draws steam and further reducing the risk of condensation; at the same time, it ensures the purity of outdoor fresh air introduced in fresh air mode and improves the effect of indoor air quality improvement.

[0012] This application also provides an air conditioner indoor unit, wherein the fresh air volute and the humidification module are arranged opposite to each other along the front-rear direction of the air conditioner indoor unit, the fresh air volute is located on the rear side of the unit housing, and the humidification module is located on the front side of the unit housing.

[0013] In this way, the fresh air volute connects to the fresh air inlet and internal circulation air inlet of the casing on the rear side, while the humidification module is arranged on the front side. This optimizes the utilization of the internal space of the casing and adapts to the compact design. The relative arrangement along the front and rear directions can make full use of the front and rear depth space of the casing and avoid the increase in casing volume caused by stacking the fresh air volute and humidification module in the left-right or up-down directions. The fresh air delivery-related components (volute, fan) are concentrated on the rear side, and the humidification treatment components (humidifier, steam outlet) are concentrated on the front side, so that the functional areas do not overlap and the overall structure of the casing is more compact.

[0014] This application also provides an air conditioner indoor unit, wherein the casing fresh air outlet includes two outlets, which are located on both sides of the casing along the width direction of the air conditioner indoor unit, and the steam outlet includes two outlets, which are configured to correspond one-to-one with the two casing fresh air outlets.

[0015] In this way, the dual-casing fresh air outlets are located on both sides, allowing airflow to diffuse along the width of the room to the left and right sides, covering a larger space and avoiding the problem of large local air volume and small air volume at a distance caused by a single outlet. At the same time, the two steam outlets correspond one-to-one with the fresh air outlets, so that the steam is sent out from both sides synchronously with the fresh air, rather than concentrated in the middle area. This ensures that the humidity rise rate on both sides of the room is consistent, avoiding the uneven phenomenon of local dryness and local over-humidity. It is especially suitable for spaces such as living rooms and bedrooms that require overall humidity regulation.

[0016] This application also provides an air conditioner indoor unit, wherein the humidification module further includes: a humidification chamber, the humidification chamber being located at the bottom of the housing, and the humidifier being located inside the humidification chamber; A humidifying pipe is located above the humidifying chamber and connects the humidifying chamber to the steam outlet.

[0017] Thus, the sealed channel design of the humidification pipe prevents steam from diffusing and escaping within the casing, ensuring that the steam generated by the humidifier is concentrated and delivered to the steam outlet, improving humidification efficiency. The humidification pipe is guided upwards and forwards from the bottom of the humidification chamber, shortening the steam delivery path and reducing temperature drops during transport. This minimizes condensation inside the pipe caused by steam cooling and prevents condensate from flowing back into the humidification chamber or dripping onto other components. The humidification chamber houses the humidifier and is located at the bottom. Water is added to the humidification chamber via a water tank located above it, concentrating the moisture in the lower part of the casing. This reduces the impact of the high temperature and humidity environment on electrical components such as the motor and control board in the upper part of the casing, lowering the risk of short circuits and component aging.

[0018] This application also provides an air conditioner indoor unit, wherein the housing is provided with an exhaust volute, and the exhaust volute is further provided with an exhaust inlet and an exhaust outlet; An exhaust fan is installed inside the exhaust volute. The exhaust fan rotates to drive indoor air into the exhaust volute from the exhaust inlet and blown to the outside through the exhaust outlet. A total heat exchanger is disposed at the intersection of the fresh air volute and the exhaust air volute for heat exchange between the fresh air and the exhaust air. An exhaust valve is movably disposed on the exhaust outlet and configured to open or close the exhaust outlet.

[0019] In this way, opening the exhaust valve simultaneously turns on both the fresh air fan and the exhaust fan, achieving two-way ventilation of fresh outdoor air entering and stale indoor air exiting, quickly improving indoor air quality; closing the exhaust valve turns on only the internal circulation mode of the fresh air system, allowing indoor air to circulate through the internal circulation air inlet, and humidifying simultaneously with the humidification module, preventing outdoor smog, low temperature or high temperature air from entering the room, thus balancing comfort and air quality.

[0020] At the same time, closing the exhaust valve can achieve a single fresh air control mode, reducing the frequency of use of the exhaust function and the exhaust duct in the total heat exchanger, reducing the risk of particulate matter in the exhaust air damaging the total heat exchanger, thereby protecting the total heat exchanger and improving its service life.

[0021] This application also provides an air conditioner indoor unit, wherein the housing further includes: The controller is configured to: After receiving the user's command to turn on the humidification mode, the humidification module and the fresh air fan are activated. The control valve is controlled to open the internal circulation air inlet, so that the indoor air entering through the internal circulation air inlet is blown into the room through the fresh air outlet of the casing under the action of the fresh air fan, and the steam is blown out through the steam outlet and the fresh air outlet of the casing.

[0022] Therefore, by using indoor air to draw in steam, compared to introducing fresh outdoor air (especially in winter when the air temperature is low), the indoor air temperature is closer to the indoor ambient temperature. This results in a smaller temperature difference when mixing with steam, effectively preventing premature condensation due to contact with cold air. This ensures that the steam diffuses into the room in gaseous form with the airflow, improving humidification efficiency. The fresh air fan drives the indoor air circulation, evenly distributing steam to all areas of the room. This avoids localized overhumidification caused by steam accumulation in a single location, or slow humidity increases in areas far from the air outlet, achieving overall humidity balance.

[0023] This application also provides an air conditioning indoor unit, wherein the controller is further configured to: The controller can control the valve to switch between opening the internal circulation air inlet and opening the fresh air inlet of the casing; and the controller can automatically shut down the humidification module after the humidification module has been running for a first preset time.

[0024] Thus, after the above process has been running for the first preset time, the controller starts the purging program. First, it automatically shuts down the humidification module to stop steam generation and avoid continuous steam production that would aggravate condensation. Then, the control valve switches from opening the fresh air inlet of the casing back to opening the internal circulation air inlet, blocking the entry of low-temperature fresh air. The fresh air fan continues to run (in internal circulation mode), drawing indoor air in through the internal circulation air inlet. When the air is blown out through the fresh air outlet of the casing, the airflow will purge the steam outlet. By utilizing the temperature (higher than the outdoor fresh air) and flow rate of the indoor air, the condensate formed at the steam outlet due to the temperature difference between the fresh air and the steam is dried or blown off, eliminating the risk of condensate accumulation.

[0025] This application also provides an air conditioning indoor unit, wherein the controller is further configured to: Upon receiving a shutdown command, the humidification module is shut down, the control valve is kept open at the internal circulation air inlet, and the fresh air fan continues to run for a second preset time so that the indoor air entering through the internal circulation air inlet dries the condensate at the steam outlet. The shutdown command is used to shut down the humidification mode and the fresh air mode.

[0026] In this way, the controller sets the duration of the fresh air fan to the second preset time, ensuring that there is enough time to dry or blow off the residual condensate at the steam outlet. After the second preset time ends, the controller turns off the fresh air fan, completing the final process of the entire shutdown phase.

[0027] Compared with the prior art, the beneficial effects of this application are as follows: In this application, the two modes of fresh air introduction and indoor air recirculation can be easily switched by controlling the valve: when fresh air is needed, the fresh air inlet of the casing is opened to introduce outdoor fresh air and improve indoor air quality; when fresh air is not needed or the outdoor air quality is poor, the fresh air inlet of the casing is closed and the internal recirculation air inlet is opened to achieve indoor air circulation and meet the needs of different scenarios.

[0028] Meanwhile, the humidification module can generate steam through the humidifier when the indoor air is dry, and blow it out through the fresh air outlet of the casing to increase the indoor air humidity, improve the indoor air dryness caused by the operation of air conditioning, enhance indoor comfort, and reduce physical discomfort and related health problems caused by dryness.

[0029] Furthermore, when the outdoor temperature is low in winter, if the humidification module is running, the internal circulation air inlet can be opened. At this time, the indoor air draws the steam out. Compared with the low-temperature outdoor fresh air, the indoor air temperature is higher, which can avoid the low-temperature fresh air from directly contacting the steam, effectively reducing the phenomenon of steam condensation, and ensuring the stable operation of the equipment and the air output effect. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the indoor unit of the air conditioner provided in the embodiment of this application; Figure 2 This is a rear view of the indoor unit of the air conditioner provided in the embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of the rear side of the indoor unit of the air conditioner provided in the embodiment of this application; Figure 4 This is one of the schematic diagrams of the motor and baffle of the indoor unit of an air conditioner provided in the embodiments of this application; Figure 5 This is a second schematic diagram of the motor and baffle of the indoor unit of the air conditioner provided in the embodiments of this application; Figure 6 This is an exploded view of the display motor and baffle of the air conditioner indoor unit provided in the embodiments of this application; Figure 7 This is a side view of the interior of the indoor unit of the air conditioner provided in the embodiment of this application; Figure 8 This is a partial structural diagram of the internal structure of the air conditioner indoor unit provided in the embodiments of this application; Figure 9 This is a schematic diagram of the display and humidification module of the air conditioner indoor unit provided in this application embodiment; Figure 10 This is a schematic diagram of the structure of the display steam outlet of the air conditioner indoor unit provided in the embodiment of this application; Figure 11 This is a schematic diagram of the humidification module of the air conditioner indoor unit provided in the embodiment of this application.

[0032] Explanation of reference numerals in the attached figures: 10-Casing; 11-Casing fresh air inlet; 12-Casing fresh air outlet; 13-Internal circulation air inlet; 14-Rear panel; 20 - Fresh air volute; 21 - Fresh air inlet of volute; 22 - Fresh air outlet of volute; 23 - Fresh air fan; 30-Humidification module; 31-Steam outlet; 32-Humidification chamber; 33-Humidification pipe; 34-Water tank; 40 - Control valve; 41 - Motor; 411 - Output end; 4111 - Anti-rotation structure; 42 - Baffle; 421 - Mounting hole; 50 - Exhaust volute; 51 - Exhaust fan; 52 - Exhaust outlet; 60 - Exhaust valve; 100 - Indoor air conditioning unit. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0035] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0036] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0037] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0038] Before explaining the technical solution of this application, the background technology of this application shall be explained first.

[0039] An air conditioner, or air conditioner, is a device used to regulate and control indoor environmental parameters (such as temperature, humidity, cleanliness, and airflow) to meet people's needs for a comfortable indoor environment or the requirements of specific processes.

[0040] During air conditioning operation, whether in cooling or heating mode, indoor air humidity may decrease, causing people to feel dry and uncomfortable, and potentially leading to problems such as dry skin and respiratory illnesses. The air conditioner's fresh air module uses a fresh air fan to draw fresh outdoor air into the room, while simultaneously using an exhaust fan to expel stale indoor air to the outside, thus completing the exchange of indoor and outdoor air and the delivery of fresh air.

[0041] In related technologies, air conditioners are equipped with a steam humidification module, which delivers water vapor into the room to increase indoor air humidity and improve indoor comfort. However, users often use the steam humidification function in winter when the air is dry. In winter, the outdoor fresh air temperature is low. When the fresh air and steam humidification functions are turned on at the same time, the temperature difference between the low outdoor fresh air and the humidified indoor air can easily cause condensation to accumulate at the air conditioner's air outlet.

[0042] Based on this, the present application provides an indoor air conditioning unit that can easily switch between two modes: fresh air introduction and indoor air recirculation, by controlling the valve. This can effectively reduce steam condensation and ensure stable operation and air output of the equipment.

[0043] The following will describe specific embodiments and appendices. Figure 1 To be continued Figure 11 The technical solution of the air conditioner indoor unit 100 of this application is described.

[0044] like Figure 1 and Figure 2 As shown, this application embodiment provides an air conditioner indoor unit 100, including a housing 10, a housing fresh air inlet 11 and a housing fresh air outlet 12, both of which are formed on the housing 10.

[0045] The casing 10 serves as the outer shell of the indoor unit 100 of the air conditioner, protecting the internal components and also forming the basic framework for the installation of other components. The casing fresh air inlet 11 is used to draw in fresh outdoor air, and the casing fresh air outlet 12 is used to blow treated air (including fresh air and humidified air) into the room.

[0046] like Figure 3 and Figure 8As shown, a fresh air volute 20 is provided inside the housing 10. A fresh air inlet 21 and a fresh air outlet 22 are also formed on the fresh air volute 20. The fresh air inlet 11 of the housing is connected to the fresh air inlet 21 of the volute.

[0047] A fresh air fan 23 is also installed inside the casing 10. The fresh air fan 23 is installed inside the fresh air volute 20. The fresh air fan 23 rotates to drive fresh air from the fresh air inlet 11 of the casing and the fresh air inlet 21 of the volute into the fresh air volute 20, and blows it into the room through the fresh air outlet 22 of the volute and the fresh air outlet 12 of the casing.

[0048] The fresh air volute 20 is a shell of a specific shape, inside which a fresh air fan 23 is installed. When the fresh air fan 23 rotates, it forms an airflow channel inside the volute, which drives fresh air into the fresh air volute 20 from the fresh air inlet 11 of the casing and the fresh air inlet 21 of the volute, and then blows it into the room through the fresh air outlet 22 of the volute and the fresh air outlet 12 of the casing, thus realizing the function of introducing and delivering fresh air.

[0049] like Figure 7 and Figure 9 As shown, a humidification module 30 is provided inside the casing 10. The humidification module 30 includes a humidifier and a steam outlet 31. The humidifier is located inside the casing 10 and is used to generate steam. The steam outlet 31 is connected to the humidifier to transmit steam to the room. The steam outlet 31 is correspondingly provided with the casing fresh air outlet 12 so that steam is blown out through the steam outlet 31 and the casing fresh air outlet 12.

[0050] The humidifier is installed inside the casing 10 and is used to generate steam, serving as the component for humidification. The steam outlet 31 is connected to the humidifier, transmitting the steam generated by the humidifier into the room, and is correspondingly set to the fresh air outlet 12 of the casing, so that the steam can be blown out along with the fresh air through the fresh air outlet 12 of the casing, thereby increasing the indoor air humidity.

[0051] like Figure 2 and Figure 4 As shown, the indoor unit 100 of the air conditioner also includes an internal circulation air inlet 13, which is formed on the casing 10. The internal circulation air inlet 13 is connected to the volute fresh air inlet 21. The fresh air fan 23 rotates to drive indoor air from the internal circulation air inlet 13 and the volute fresh air inlet 21 into the volute, and blows it into the room through the volute fresh air outlet 22 and the casing fresh air outlet 12.

[0052] An internal circulation air inlet 13 is formed on the casing 10 and is connected to the volute fresh air inlet 21. When indoor air internal circulation is required, the fresh air fan 23 rotates to drive indoor air into the volute from the internal circulation air inlet 13 and the volute fresh air inlet 21, and then blows it into the room through the volute fresh air outlet 22 and the casing fresh air outlet 12, thus realizing the circulation of indoor air.

[0053] like Figure 4and Figure 5 As shown, the indoor unit 100 of the air conditioner also includes a control valve 40, which is movably mounted on the housing 10. The control valve 40 is configured to open one of the fresh air inlet 11 and the internal circulation air inlet 13 of the housing.

[0054] The control valve 40 is movably mounted on the housing 10 and can open one of the housing fresh air inlet 11 and the internal circulation air inlet 13. By controlling the opening and closing state of the control valve 40, the fresh air introduction mode and the indoor air circulation mode of the air conditioning indoor unit 100 can be switched.

[0055] Thus, by controlling valve 40, it is easy to switch between two modes: fresh air introduction and indoor air recirculation. When fresh air is needed, the fresh air inlet 11 of the casing is opened to introduce outdoor fresh air and improve indoor air quality. When fresh air is not needed or the outdoor air quality is poor, the fresh air inlet 11 of the casing is closed and the internal recirculation air inlet 13 is opened to achieve indoor air circulation and meet the needs of different scenarios.

[0056] Meanwhile, the humidification module 30 can generate steam through the humidifier and blow it out through the fresh air outlet 12 of the casing when the indoor air is dry, thereby increasing the indoor air humidity, improving the indoor air dryness caused by the operation of the air conditioner, enhancing indoor comfort, and reducing physical discomfort and related health problems caused by dryness.

[0057] Furthermore, when the outdoor temperature is low in winter, if the humidification module 30 is running, the internal circulation air inlet 13 can be opened. At this time, the indoor air draws the steam out. Compared with the low-temperature outdoor fresh air, the indoor air temperature is higher, which can avoid the low-temperature fresh air from directly contacting the steam, effectively reducing the phenomenon of steam condensation, and ensuring the stable operation of the equipment and the air output effect.

[0058] In the diagram, the X direction is the width of the air conditioner indoor unit 100, the Y direction is the front-to-back direction of the air conditioner indoor unit 100, and the Z direction is the up-to-down direction of the air conditioner indoor unit 100.

[0059] In some embodiments, such as Figure 3 and Figure 6 As shown, the housing 10 includes a rear side plate 14, and the volute fresh air inlet 21 is disposed facing the rear side plate 14. The housing fresh air inlet 11 and the internal circulation air inlet 13 are both disposed on the rear side plate 14. Along the width direction of the indoor air conditioning unit 100, the housing fresh air inlet 11 and the internal circulation air inlet 13 overlap with the volute fresh air inlet 21.

[0060] Thus, since the fresh air inlet 11 and the internal circulation air inlet 13 of the casing overlap with the fresh air inlet 21 of the volute along the width direction, air can directly enter the volute without changing its flow direction after entering from the inlet, minimizing the airflow path. This avoids wind resistance loss caused by the bend in the airflow path, reduces the additional energy consumption of the fresh air fan 23, and ensures a more stable airflow in both modes, avoiding airflow attenuation caused by wind resistance.

[0061] The rear side panel 14 of the housing 10 integrates the fresh air inlet 11 and the internal circulation air inlet 13, which overlap with the volute inlet. This eliminates the need for the fresh air volute 20 to design a complex flow splitting structure to accommodate the two inlets, and also eliminates the need to reserve different airflow channels for the two inlets inside the housing 10, making the overall volume of the housing 10 more compact.

[0062] Moreover, on the one hand, it makes the switching action of the control valve 40 simpler, requiring only the opening and closing of a single inlet to be controlled on the same plane, reducing the jamming and misalignment problems that may occur when multiple components are linked; on the other hand, the design of direct airflow into the volute can avoid wear or condensation splashing caused by airflow impacting other components inside the housing 10, while reducing the noise caused by airflow vortex in the non-overlapping design, taking into account both operational stability and quietness.

[0063] In some embodiments, such as Figure 5 and Figure 6 As shown, the control valve 40 includes a motor 41 and a baffle 42. The motor 41 is mounted on the rear side plate 14. The baffle 42 is rotatably mounted on the output end 411 of the motor 41. The outer circumferential dimension of the baffle 42 is greater than or equal to the dimension of the fresh air inlet 11 of the housing and the dimension of the internal circulation air inlet 13.

[0064] Thus, the outer perimeter of the baffle 42 is greater than or equal to the dimensions of the two inlets. When the baffle 42 is rotated to any inlet position, it can completely block the inlet, effectively preventing the problem of outdoor air mixing with indoor air in fresh air mode or indoor air leakage to the outside in recirculation mode. For example, when recirculating humidification in winter, it can completely block the entry of low-temperature outdoor fresh air, ensuring that indoor air efficiently draws steam and further reducing the risk of condensation; at the same time, it ensures the purity of outdoor fresh air introduced in fresh air mode and improves the effect of indoor air quality improvement.

[0065] The structure of a single motor 41 and a single baffle 42 eliminates the need to design separate drive components (such as dual motors 41 and dual baffles 42) for the two inlets. This reduces the number of parts and compresses the installation space on the rear panel 14, making it suitable for the compact design requirements of the indoor unit. On the other hand, the linkage logic of the single drive mechanism is simpler (only the forward and reverse rotation or rotation at a specific angle of the motor 41 needs to be controlled), reducing the possibility of jamming, misalignment and other faults that may occur when multiple parts work together, while also reducing the cost of production, assembly and subsequent maintenance.

[0066] In some embodiments, such as Figure 6 As shown, the baffle 42 is provided with a mounting hole 421, and the output end 411 of the motor 41 passes through the mounting hole 421. The output end 411 of the motor 41 is also provided with an anti-rotation structure 4111, which is used to prevent the output end 411 of the motor 41 from rotating relative to the mounting hole 421.

[0067] Thus, when the air conditioner switches modes, the motor 41 drives the output end 411 to rotate. The anti-rotation structure 4111 ensures that the baffle 42 rotates synchronously, preventing transmission failure due to the weight of the baffle 42 itself, airflow impact, or long-term wear, ensuring a rapid response to mode switching. Since there is no relative rotation between the output end 411 of the motor 41 and the baffle 42, the motor 41 can precisely control the position of the baffle 42 through a preset rotation angle, avoiding the mixing of fresh air and internal circulation air.

[0068] In some embodiments, such as Figure 6 As shown, the mounting hole 421 is an elongated hole, and the anti-rotation structure 4111 includes an anti-rotation plane provided on the output end 411 of the motor 41. The anti-rotation plane cooperates with the hole wall of the elongated hole to prevent the output end 411 of the motor 41 from rotating relative to the mounting hole 421.

[0069] In this way, the fit between the anti-rotation plane and the wall of the elongated hole ensures the synchronous rotation of the output end 411 of the motor 41 and the baffle 42 while preserving assembly tolerance, preventing slippage or transmission lag and guaranteeing the accuracy of mode switching. The anti-rotation plane only requires simple cutting of the output end 411 of the motor 41, and the elongated hole can also be formed by conventional stamping or drilling processes, without the need for complex mold design or precision machining, which greatly reduces the manufacturing cost of parts and reduces assembly steps.

[0070] In some embodiments, the indoor unit 100 of the air conditioner further includes a filter element disposed at the fresh air inlet 21 of the volute; the filter element includes a first filter element and a second filter element, the first filter element being used to filter solid particulate pollution; the second filter element is disposed on the side near the first filter element near the rear side panel 14, and the second filter element is used to filter formaldehyde.

[0071] In some embodiments, such as Figure 7 and Figure 8 As shown, the fresh air volute 20 and the humidification module 30 are arranged opposite each other along the front-rear direction of the air conditioner indoor unit 100. The fresh air volute 20 is located on the rear side of the housing 10, and the humidification module 30 is located on the front side of the housing 10.

[0072] In this way, the fresh air volute 20 connects to the fresh air inlet 11 and the internal circulation air inlet 13 of the housing on the rear side, and the humidification module 30 is arranged on the front side. This optimizes the utilization of the internal space of the housing 10 and adapts to the compact design. The relative arrangement along the front and rear directions can make full use of the front and rear depth space of the housing 10 and avoid the increase in the volume of the housing 10 caused by stacking the fresh air volute 20 and the humidification module 30 in the left-right or up-down directions. The fresh air delivery related components (volute, fan) are concentrated on the rear side, and the humidification treatment components (humidifier, steam outlet 31) are concentrated on the front side. This achieves non-overlapping functional zoning and makes the overall structure of the housing 10 more compact.

[0073] The air delivered by the fresh air volute 20 is at a lower temperature, and the humidification module 30 may generate some heat during operation. The front and rear partitioned layout reduces direct heat exchange between the two, preventing low-temperature air from affecting the steam generation efficiency of the humidification module 30, or high-temperature environments from causing condensation in the fresh air volute 20. The fan in the fresh air volute 20 vibrates during operation, and the humidification module 30 involves water vapor transport. The front and rear separation layout reduces the impact of vibration on the humidification module 30's pipes and interfaces, while also preventing condensate that may be generated during humidification from contacting the rear fresh air fan 23 or electrical components, reducing the risk of short circuits and component corrosion.

[0074] In some embodiments, such as Figure 9 and Figure 10 As shown, there are two fresh air outlets 12 in the casing, which are located on both sides of the casing 10 along the width direction of the indoor unit 100. There are also two steam outlets 31, which are arranged in a one-to-one correspondence with the two fresh air outlets 12 in the casing.

[0075] In this way, the dual-casing fresh air outlets 12 are located on both sides, allowing airflow to diffuse along the width of the room to the left and right sides, covering a larger space and avoiding the problem of large local air volume and small air volume at a distance caused by a single outlet. At the same time, the two steam outlets 31 correspond one-to-one with the fresh air outlets, so that steam is sent out from both sides synchronously with the fresh air, rather than concentrated in the middle area. This ensures that the humidity rise rate on both sides of the room is consistent, avoiding the uneven phenomenon of local dryness and local over-humidity. It is especially suitable for spaces such as living rooms and bedrooms that require overall humidity regulation.

[0076] In some embodiments, such as Figures 1 to 2 As shown, the humidification module 30 also includes a humidification chamber 32 and a humidification pipe 33. The humidification chamber 32 is located at the bottom of the housing 10, and the humidifier is located inside the humidification chamber 32. The humidification pipe 33 is located above the humidification chamber 32 and connects the humidification chamber 32 and the steam outlet 31.

[0077] Thus, the sealed channel design of the humidification pipe 33 prevents steam from diffusing and escaping within the casing 10, ensuring that the steam generated by the humidifier is concentrated and delivered to the steam outlet 31, thereby improving humidification efficiency. The humidification pipe 33 is guided upwards and forwards from the bottom humidification chamber 32, shortening the steam delivery path, reducing the temperature drop of the steam during delivery, reducing condensation inside the pipe caused by steam cooling, and preventing condensate from flowing back into the humidification chamber 32 or dripping onto other components. The humidification chamber 32 houses the humidifier and is located at the bottom. Water is added to the humidification chamber 32 through the water tank 34 located above it, which concentrates the water vapor in the lower part of the casing 10, reducing the impact of the high temperature and high humidity environment on electrical components such as the motor 41 and control board in the upper part of the casing 10, and reducing the risk of short circuits and component aging.

[0078] In some embodiments, such as Figure 11 As shown, the housing 10 is provided with an exhaust volute 50 and an exhaust fan 51. The exhaust volute 50 is also provided with an exhaust inlet and an exhaust outlet 52. The exhaust fan 51 is provided inside the exhaust volute 50. The exhaust fan rotates to drive indoor air into the exhaust volute 50 from the exhaust inlet and blow it to the outside through the exhaust outlet 52.

[0079] In some embodiments, such as Figure 8 As shown, a total heat exchanger and an exhaust valve 60 are also provided inside the housing 10. The total heat exchanger is located at the intersection of the fresh air volute 20 and the exhaust volute 50 and is used for heat exchange between the fresh air and the exhaust air. The exhaust valve 60 is movably installed on the exhaust outlet 52 and is configured to open or close the exhaust outlet 52.

[0080] Thus, opening the exhaust valve 60 simultaneously activates the fresh air fan 23 and the exhaust fan 51, achieving bidirectional ventilation by introducing fresh outdoor air and expelling stale indoor air, quickly improving indoor air quality. Closing the exhaust valve 60 activates only the internal circulation mode of the fresh air system, allowing indoor air to circulate through the internal circulation air inlet 13. Combined with the humidification module 30, humidification can be achieved simultaneously, preventing outdoor smog, low-temperature, or high-temperature air from entering the room, thus balancing comfort and air quality.

[0081] Not only are total heat exchangers energy-efficient, they also prevent cold air from directly entering the room in winter, thus avoiding localized cooling, and prevent hot and humid air from directly entering the room in summer, thus avoiding localized heating or dampness. This allows the temperature and humidity of the fresh air to be closer to the indoor environment, reducing indoor temperature and humidity fluctuations and improving user comfort. Simultaneously, closing the exhaust valve 60° enables a single-fresh-air control mode, reducing the frequency of exhaust function use and the exhaust duct usage within the total heat exchanger. This lowers the risk of particulate matter in the exhaust air damaging the heat exchanger, thereby protecting it and extending its lifespan.

[0082] In some embodiments, the indoor unit 100 of the air conditioner includes a controller, which is configured to: After receiving the user's command to turn on the humidification mode, the humidification module 30 and the fresh air fan 23 are put into operation; Control valve 40 opens the internal circulation air inlet 13 so that the indoor air entering through the internal circulation air inlet 13 is blown into the room through the fresh air outlet 12 of the casing under the action of the fresh air fan 23, and the steam is blown out through the steam outlet 31 and the fresh air outlet 12 of the casing.

[0083] The controller first receives a "turn on humidification mode" command from the user via remote control, buttons on the unit, or a mobile app, indicating a need to increase indoor humidity. Next, upon receiving the humidification mode command, the controller simultaneously performs two operations: First, it activates the humidification module 30, controlling the humidifier to generate steam. The steam is delivered to the steam outlet 31 through the humidification pipe 33, preparing for subsequent humidification. Simultaneously, it activates the fresh air fan 23, controlling the control valve 40 to close the fresh air inlet 11 and open the internal circulation air inlet 13. The airflow drawn by the fresh air fan 23 enters through the internal circulation air inlet 13, passes through the fresh air volute 20, the volute fresh air outlet 22, and the unit's fresh air outlet 12, simultaneously expelling steam from the steam outlet 31 along with the indoor airflow.

[0084] The system employs an indoor air-driven steam extraction method. Compared to introducing outdoor fresh air (especially in winter when temperatures are low), the indoor air temperature is closer to the indoor ambient temperature. This results in a smaller temperature difference when mixing with steam, effectively preventing premature condensation due to contact with cold air. This ensures the steam diffuses into the room in gaseous form, improving humidification efficiency. The fresh air fan 23 drives indoor air circulation, evenly distributing steam to all areas of the room. This avoids localized overhumidification caused by steam accumulation in a single location, or slow humidity increases in areas far from the air outlet, achieving overall humidity balance.

[0085] In humidification mode, only the humidification module 30 and the fresh air fan 23 are activated, eliminating the need to start high-energy-consuming components such as the exhaust system, cooling or heating system. Energy is concentrated on steam generation and airflow, reducing unnecessary energy consumption. When the outdoor environment is harsh, closing the fresh air inlet 11 on the casing can prevent outdoor pollutants or air with extreme temperatures from entering the room, ensuring stable indoor air quality and temperature while increasing humidity.

[0086] Moreover, it simplifies user operation and improves ease of use. Users only need to issue a single command to "turn on humidification mode", and the controller can automatically complete the linkage operation of "humidification module 30 starts, fresh air fan 23 starts, and control valve 40 switches". Users do not need to manually adjust multiple components, reducing the complexity of operation, which is especially user-friendly for users who are not familiar with the functions of the equipment.

[0087] For example, the method for activating the humidification mode in this embodiment includes the following steps: S11: Accepts user commands to activate humidification mode; S12: Humidification module 30 is turned on; fresh air fan 23 is turned on and control valve 40 opens internal circulation air inlet 13.

[0088] In some embodiments, the controller is further configured to: after receiving a user's instruction to switch to fresh air mode, control the control valve 40 to switch between opening the internal circulation air inlet 13 and opening the fresh air inlet 11 of the casing; and automatically shut down the humidification module 30 after the humidification module 30 has been running for a first preset time.

[0089] Specifically, after the control valve 40 opens the internal circulation air inlet 13, the controller is configured as follows: S1: Switch to fresh air mode so that the control valve 40 switches to open the fresh air inlet 11 of the casing. The fresh air entering the fresh air inlet 11 of the casing is blown into the room by the fresh air outlet 12 of the casing under the action of the fresh air fan 23, so that the steam is blown out through the steam outlet 31 and the fresh air outlet 12 of the casing. S2: After the humidification module 30 has been running for a first preset time, the controller automatically shuts off the humidification module 30 and controls the valve 40 to switch to the opening of the internal circulation air inlet 13 so that the indoor air entering through the internal circulation air inlet 13 can blow away the condensate at the steam outlet 31; the fresh air fan 23 runs for a first preset time in the mode with the internal circulation air inlet 13 open. Repeat steps S1 and S2 above.

[0090] During the operation of the humidification mode, after receiving the user's instruction to switch to the fresh air mode, the controller first controls the control valve 40 to switch from opening the internal circulation air inlet 13 to opening the fresh air inlet 11 of the casing. At this time, the system enters the fresh air mode: outdoor fresh air enters through the fresh air inlet 11 of the casing and is blown into the room through the fresh air outlet 12 of the casing under the traction of the fresh air fan 23. At the same time, the humidification module 30 continues to operate, and the steam is still mixed with the fresh air through the steam outlet 31 and blown out together. Fresh air is introduced during the humidification process to avoid the decline in indoor air quality caused by long-term internal circulation and to balance the needs of humidification and ventilation.

[0091] After the above process has been running for the first preset time, the controller starts the purging program. First, it automatically shuts down the humidification module 30 to stop steam generation and avoid continuous steam production that would aggravate condensation. Then, the control valve 40 switches from opening the fresh air inlet 11 to opening the internal circulation air inlet 13, blocking the entry of low-temperature fresh air. The fresh air fan 23 continues to run (in internal circulation mode), drawing indoor air in through the internal circulation air inlet 13. When the air is blown out through the fresh air outlet 12, the airflow will purge the steam outlet 31. By utilizing the temperature of the indoor air (which is higher than that of the outdoor fresh air) and the flow rate, the condensate formed at the steam outlet 31 due to the temperature difference between the fresh air and the steam will be dried or blown off, eliminating the risk of condensate accumulation.

[0092] S1 and S2 are precisely connected through a first preset time. While traditional internal circulation humidification can reduce condensation, long-term operation can easily lead to increased indoor CO2 concentration and decreased air quality. On the other hand, single fresh air humidification can provide ventilation, but the low temperature of the outdoor fresh air can easily cause condensation at the steam outlet 31. This logic uses the S1-S2 cycle. In the S1 stage, fresh air is introduced to achieve humidification and ventilation, ensuring fresh indoor air. In the S2 stage, the internal circulation purge is used to solve the condensation problem, while the humidification module 30 is turned off to avoid unnecessary energy consumption, perfectly balancing the contradictions between the two.

[0093] For example, the method for switching fresh air modes in this embodiment includes the following steps: S13: Accepts user commands to switch to fresh air mode; S14: Humidification module 30 remains in place; control valve 40 switches to open the fresh air inlet 11 in the casing. S15: Humidification module 30 is closed; control valve 40 is switched to open internal circulation air inlet 13.

[0094] S14 and S15 switch repeatedly for a first preset time duration.

[0095] In some embodiments, the controller is configured to: Upon receiving the shutdown command, the humidification module 30 is shut down, the control valve 40 is kept open at the internal circulation air inlet 13, and the fresh air fan 23 continues to run for a second preset time so that the indoor air entering through the internal circulation air inlet 13 dries the condensate at the steam outlet 31. The shutdown command is used to shut down the humidification mode and the fresh air mode.

[0096] The controller receives a shutdown command to "turn off humidification mode and fresh air mode". The command clearly states that the goal is to terminate the current humidification and fresh air delivery. In order to solve the potential problem of residual condensate at steam outlet 31 after the mode is turned off, and to avoid the accumulation of condensate due to the inability to handle it after the equipment is shut down, a condensate removal process is added at the same time as the shutdown function.

[0097] First, immediately shut off the humidifier module 30 to stop the humidifier from producing steam and cut off the steam source to prevent new steam from being generated during the subsequent purging process, ensuring that the purging only targets the remaining condensate. Maintain the control valve 40 in the state where the internal circulation air inlet 13 is open and the casing fresh air inlet 11 is closed, blocking the entry of outdoor low-temperature fresh air (to prevent low temperature from aggravating condensation or contact with residual condensate), leaving only the indoor air circulation channel open. The fresh air fan 23 continues to work in internal circulation mode, drawing indoor air in through the internal circulation air inlet 13. When the air is blown out through the casing fresh air outlet 12, the airflow directly acts on the steam outlet 31, using the temperature of the indoor air (close to the indoor ambient temperature, without low-temperature impact) and the flow rate to purge the residual condensate at the outlet.

[0098] The controller sets the duration of the fresh air fan 23 to the second preset time to ensure that there is enough time to dry or blow off the residual condensate at the steam outlet 31. After the second preset time is over, the controller turns off the fresh air fan 23 to complete the closing process of the entire shutdown phase.

[0099] For example, the method for issuing a shutdown command in this embodiment includes the following steps: S16: Accept the user's shutdown command; S17: Humidification module 30 is closed; control valve 40 remains open until internal circulation air inlet 13 is open; S18: After the second preset time has elapsed, the fresh air fan 23 will be turned off.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: chassis; The fresh air inlet is located on the casing. The fresh air outlet is located on the casing. The housing contains: The fresh air volute has a volute fresh air inlet and a volute fresh air outlet, and the housing fresh air inlet is connected to the volute fresh air inlet. A fresh air fan is installed inside the fresh air volute. The fresh air fan rotates to drive fresh air into the fresh air volute from the fresh air inlet of the casing and the fresh air inlet of the volute, and blows it into the room through the fresh air outlet of the volute and the fresh air outlet of the casing. Humidification module, the humidification module includes: A humidifier, wherein the humidifier is disposed within the casing and is used to generate steam; A steam outlet is provided, which is connected to the humidifier to deliver steam into the room. The steam outlet is also provided in correspondence with the fresh air outlet of the casing, so that the steam is blown out through the steam outlet and the fresh air outlet of the casing. An internal circulation air inlet is formed on the casing. The internal circulation air inlet is connected to the fresh air inlet of the volute. The fresh air fan rotates to drive indoor air from the internal circulation air inlet and the fresh air inlet of the volute into the volute, and blows it into the room through the fresh air outlet of the volute and the fresh air outlet of the casing. A control valve is movably mounted on the housing and is configured to open one of the housing's fresh air inlet and the internal circulation air inlet.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The housing includes a rear side panel, and the volute fresh air inlet is disposed facing the rear side panel. Both the housing fresh air inlet and the internal circulation air inlet are disposed on the rear side panel. Along the width direction of the indoor unit of the air conditioner, both the housing fresh air inlet and the internal circulation air inlet overlap with the volute fresh air inlet.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, The control valve includes: An electric motor, which is mounted on the rear side plate; A baffle is rotatably mounted on the output end of the motor, and the outer circumferential dimension of the baffle is greater than or equal to the dimension of the fresh air inlet of the housing and the dimension of the internal circulation air inlet.

4. The indoor unit of the air conditioner according to claim 3, characterized in that, The fresh air volute and the humidification module are arranged opposite each other along the front-rear direction of the indoor unit of the air conditioner. The fresh air volute is located on the rear side of the housing, and the humidification module is located on the front side of the housing.

5. The indoor unit of the air conditioner according to claim 4, characterized in that, The unit includes two fresh air outlets, which are located on both sides of the unit along the width of the indoor unit. The unit also includes two steam outlets, which are configured to correspond one-to-one with the two fresh air outlets.

6. The indoor unit of the air conditioner according to claim 5, characterized in that: The humidification module also includes: A humidification chamber is located at the bottom of the housing, and the humidifier is located inside the humidification chamber; A humidifying pipe is located above the humidifying chamber and connects the humidifying chamber to the steam outlet.

7. The indoor unit of an air conditioner according to any one of claims 1-6, characterized in that: The housing contains: An exhaust volute, wherein an exhaust inlet and an exhaust outlet are formed on the exhaust volute; An exhaust fan is installed inside the exhaust volute. The exhaust fan rotates to drive indoor air into the exhaust volute from the exhaust inlet and blown to the outside through the exhaust outlet. A total heat exchanger is disposed at the intersection of the fresh air volute and the exhaust air volute for heat exchange between the fresh air and the exhaust air. An exhaust valve is movably disposed on the exhaust outlet and configured to open or close the exhaust outlet.

8. The indoor unit of the air conditioner according to claim 1, characterized in that, The housing also contains: The controller is configured to: After receiving the user's command to turn on the humidification mode, the humidification module and the fresh air fan are activated. The control valve is controlled to open the internal circulation air inlet, so that the indoor air entering through the internal circulation air inlet is blown into the room through the fresh air outlet of the casing under the action of the fresh air fan, and the steam is blown out through the steam outlet and the fresh air outlet of the casing.

9. The indoor unit of the air conditioner according to claim 8, characterized in that, The controller is also configured to: upon receiving a user's command to switch to fresh air mode, control the control valve to switch between opening the internal circulation air inlet and opening the fresh air inlet of the casing; and automatically shut down the humidification module after the humidification module has been running for a first preset time.

10. The indoor unit of the air conditioner according to claim 9, characterized in that, The controller is also configured to: Upon receiving a shutdown command, the humidification module is shut down, the control valve is kept open at the internal circulation air inlet, and the fresh air fan continues to run for a second preset time so that the indoor air entering through the internal circulation air inlet dries the condensate at the steam outlet. The shutdown command is used to shut down the humidification mode and the fresh air mode.

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