Air conditioner indoor unit and air conditioning system

Abstract

The utility model discloses an air conditioner indoor unit and air conditioning system, air conditioner indoor unit has refrigeration mode and dehumidification mode, include: casing, air inlet air duct, air outlet air duct, fan part, be located in the casing, be used for driving the wind of outside from air inlet air duct enters the casing and from air outlet air duct exports the casing, heat exchanger is located in the air inlet air duct to with the wind of passing through the air inlet air duct carries out heat exchange, in refrigeration mode and dehumidification mode, the heat exchanger is inhaled into refrigerant to carry out cooling to the wind of entering the air inlet air duct, heater is located in the air outlet air duct, in dehumidification mode, the heater carries out heating to the wind of exporting from the air outlet air duct.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to an indoor air conditioning unit and an air conditioning system. Background Technology

[0002] Air conditioners are widely used in modern society as common electrical appliances. Refrigeration components are the core basic components of an air conditioner, mainly including the compressor, evaporator, condenser, and expansion valve. The compressor draws in low-pressure refrigerant from the evaporator, increases its pressure, and sends it to the condenser, where it condenses into a higher-pressure liquid. After being throttled by the expansion valve, it becomes a lower-pressure liquid and is sent to the evaporator, where it absorbs heat and evaporates, becoming a lower-pressure refrigerant, which is then sent back to the compressor inlet, thus completing the refrigeration cycle. Air conditioners can be classified into two types according to their structure: integrated and split-type; and according to their function: cooling-only air conditioners and dual-purpose (cooling and heating) air conditioners. Existing air conditioners are suitable for cooling in summer, but their dehumidification effect is not significant enough in spring and autumn. Utility Model Content

[0003] The purpose of this invention is to provide an air conditioning indoor unit with good cooling and dehumidification effects.

[0004] This utility model discloses an indoor unit for an air conditioner, which has a cooling mode and a dehumidification mode, including:

[0005] case;

[0006] Air intake duct;

[0007] Air duct;

[0008] A fan component, disposed within the housing, is used to drive external air into the housing from the air inlet duct and out of the housing from the air outlet duct;

[0009] A heat exchanger is provided in the air inlet duct to exchange heat with the air passing through the air inlet duct. In cooling mode and dehumidification mode, refrigerant is introduced into the heat exchanger to cool the air entering the air inlet duct.

[0010] A heater is located inside the air outlet duct. In dehumidification mode, the heater heats the air output from the air outlet duct.

[0011] In some embodiments, the air outlet duct includes a first air duct with an outlet at the upper end of the housing and a second air duct with an outlet at the lower end of the housing. The heater is disposed in the second air duct. In cooling mode, the fan component drives air to exit the housing from the first air duct. In dehumidification mode, the fan component drives air to be heated by the heater in the second air duct and then exits the housing from the second air duct.

[0012] In some embodiments, a heating mode is also provided, in which refrigerant is introduced into the heat exchanger to heat the air entering the air inlet duct, and the fan component drives the air to be heated by the heater in the second air duct and then outputs it from the second air duct to the housing.

[0013] In some embodiments, the system further includes a first air guide plate disposed at the upper end of the housing and a second air guide plate disposed at the lower end of the housing. The fan component includes a cross-flow fan, which includes an impeller, a volute, and a rotating duct wall. In cooling mode, the fan outlet formed by the volute and rotating duct wall of the cross-flow fan is connected to the first duct, the first air guide plate opens the first duct, and the second air guide plate closes the second duct. In dehumidification mode, the fan outlet formed by the volute and rotating duct wall of the cross-flow fan is connected to the second duct, the first air guide plate closes the first duct, and the second air guide plate opens the second duct. In heating mode, the fan outlet formed by the volute and rotating duct wall of the cross-flow fan is connected to the second duct, the first air guide plate closes the first duct, and the second air guide plate opens the second duct. The volute and rotating duct of the cross-flow fan are relatively fixed and rotated to switch the fan outlet between being connected to the first duct and being connected to the second duct.

[0014] In some embodiments, the cross-flow fan further includes a duct turntable coaxial with and rotatable relative to the impeller, wherein the volute tongue and the rotating duct wall are fixed on the duct turntable.

[0015] In some embodiments, a front panel is further provided at the front end of the housing. The front panel is movably disposed relative to the housing such that the bottom end of the front panel opens between the housing to form a first air inlet and the top end of the front panel opens between the housing to form a second air inlet. In cooling mode, the bottom end of the front panel opens between the housing to form the first air inlet, which is connected to the air intake duct. In dehumidification mode, the top end of the front panel opens between the housing to form the second air inlet, which is connected to the air intake duct.

[0016] In some embodiments, the device further includes a first telescopic mechanism disposed between the bottom end of the front panel and the housing, and a second telescopic mechanism disposed between the top end of the front panel and the housing. The first telescopic mechanism extends and the second telescopic mechanism retracts to open the space between the bottom end of the front panel and the housing to form a first air inlet, and the second telescopic mechanism extends and the first telescopic mechanism retracts to open the space between the bottom end of the front panel and the housing to form a second air inlet.

[0017] The second aspect of this utility model discloses an air conditioning system, comprising a compressor, a condenser, a throttling device, and any one of the aforementioned indoor air conditioning units connected in sequence, wherein the throttling device is connected to the heat exchanger, and the heat exchanger is connected to the compressor.

[0018] In some embodiments, the heater is connected at both ends to the throttling device and the compressor, respectively. In dehumidification mode, the compressor supplies refrigerant to the heater to heat the air output from the air outlet duct.

[0019] In some embodiments, the indoor unit of the air conditioner also has a heating mode, in which the compressor supplies refrigerant to the heat exchanger and the heater respectively to heat the air entering the air inlet duct and the air exiting the air outlet duct respectively.

[0020] Based on the indoor unit of the air conditioner provided by this utility model, by placing the heat exchanger in the air inlet duct and the heater in the air outlet duct, the indoor unit of the air conditioner can not only meet the normal cooling and temperature reduction functions, but also effectively dehumidify. During dehumidification, the heat exchanger cools and dehumidifies the air in the air inlet duct, and then the heater in the air outlet duct heats and raises the temperature of the air. This ensures that the air is effectively dehumidified while maintaining a comfortable temperature, thus providing comfortable dehumidification in environments such as spring and autumn. In addition, since the heater and heat exchanger are located in different air ducts, interference from the heater to the heat exchanger can be avoided, allowing the heat exchanger to maintain a good heat exchange effect.

[0021] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a cross-sectional view of the indoor unit of the air conditioner according to an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 The diagram shown is a structural schematic of the indoor unit of the air conditioner in cooling mode.

[0025] Figure 3 for Figure 1 The diagram shown is a structural schematic of the indoor unit of the air conditioner in dehumidification mode.

[0026] Figure 4 for Figure 1The diagram shown is a structural schematic of the indoor unit of the air conditioner in heating mode.

[0027] Figure 5 This is a cross-sectional view of the indoor unit of an air conditioner according to another embodiment of the present invention;

[0028] Figure 6 This is a cross-sectional structural schematic diagram of an indoor air conditioner unit according to another embodiment of the present utility model;

[0029] Figure 7 This is a schematic diagram of the air conditioning system in cooling mode according to an embodiment of the present utility model;

[0030] Figure 8 for Figure 7 The diagram shown is a schematic of the air conditioning system in dehumidification mode.

[0031] Figure 9 for Figure 7 The diagram shown is a schematic of the air conditioning system in heating mode. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0037] like Figures 1 to 6 As shown, the indoor unit of the air conditioner in this embodiment has a cooling mode and a dehumidification mode. The indoor unit includes a housing 1, an air inlet duct 2, an air outlet duct 3, a fan component 4, a heat exchanger 5, and a heater 6.

[0038] The fan component 4 is located inside the housing 1. The fan component 4 is used to drive the outside air into the housing 1 from the air inlet duct 2 and out of the housing 1 from the air outlet duct 3.

[0039] Heat exchanger 5 is located inside air inlet duct 2 to exchange heat with the air passing through air inlet duct 2. In cooling mode and dehumidification mode, refrigerant is introduced into heat exchanger 5 to cool the air entering air inlet duct 2. In cooling mode and dehumidification mode, fan component drives outside air to form wind entering air inlet duct. When passing through heat exchanger 5 in air inlet duct, the air exchanges heat with the low temperature refrigerant in heat exchanger 5. The air is cooled by heat exchanger, the temperature drops, and some of the moisture in the air is cooled and liquefied. The moisture content of the air in air inlet duct decreases. Then the air enters fan component 4 from air inlet duct 2, and fan component 4 then outputs the air to air outlet duct 3.

[0040] Heater 6 is located inside air outlet duct 3. In dehumidification mode, heater 6 heats the air output from air outlet duct 3. At this time, the heater has a heating function. The air entering the air outlet duct from the fan component is heated by the heater in dehumidification mode. After being heated, the air is output from the air outlet duct 3 to the outside environment. In cooling mode, the air entering the air outlet duct from the fan component is not heated by the heater.

[0041] In this embodiment, the indoor unit of the air conditioner, by placing the heat exchanger 5 in the air inlet duct 2 and the heater 6 in the air outlet duct 3, can not only meet the normal cooling and temperature reduction functions, but also effectively dehumidify. During dehumidification, the heat exchanger 5 cools and dehumidifies the air in the air inlet duct 2, and then the heater 6 in the air outlet duct 3 heats the air. This ensures that the air is effectively dehumidified while maintaining a comfortable temperature, thus providing comfortable dehumidification in environments such as spring and autumn. In addition, since the heater 6 and the heat exchanger 5 are located in different air ducts, the heater 6 can avoid interfering with the heat exchanger 5, allowing the heat exchanger 5 to maintain a good heat exchange effect.

[0042] In some embodiments, such as Figures 1 to 4As shown, the air outlet duct 3 includes a first air duct 31 with its outlet located at the upper end of the housing 1 and a second air duct 32 with its outlet located at the lower end of the housing 1. A heater 6 is located within the second air duct 32. In cooling mode, the fan component 4 drives air to exit the housing 1 from the first air duct 31. In dehumidification mode, the fan component 4 drives air to be heated by the heater in the second air duct 32 and then exits the housing 1 from the second air duct 32. In this application, "upper" and "lower" refer to the orientation of the indoor air conditioning unit after it is installed and is in operation. For example, if the indoor air conditioning unit is a wall-mounted unit, the orientation is based on the unit being installed on the wall. After installation, the upper end of the indoor air conditioning unit is the upper end, and the lower end is the lower end. In this embodiment, the outlet of the first air duct 31 is located at the upper end of the housing 1, so the air output from the first air duct 31 is directed towards the upper end of the housing 1. The outlet of the second air duct 32 is located at the lower end of the housing 1, so the air output from the second air duct 32 is directed towards the lower end of the housing 1. In this embodiment, by setting up a first and second air duct with different outlet positions and placing the heater inside the second air duct, in cooling mode, the cold air output by the fan component is discharged from the second air duct towards the upper end of the casing. The denser cold air discharged from the upper end of the casing avoids the discomfort of cold feet and hot head caused by downward blowing. The cold air does not blow directly on people, and due to gravity, it sinks downwards, providing a more comprehensive cooling effect and greater comfort. Simultaneously, the cold air discharged from the outlet air duct does not pass through the heater, resulting in low air resistance. In dehumidification mode, the air output by the fan component is discharged from the second air duct and is heated by the heater during the discharge process, reducing air density. Discharging from the lower end of the casing is also more suitable.

[0043] In some embodiments, the indoor unit of the air conditioner also has a heating mode. In the heating mode, refrigerant is introduced into the heat exchanger 5 to heat the air entering the air inlet duct 2. The fan component 4 drives the air into the second air duct 32, where it is then heated by the heater before being output from the second air duct 32 to the casing 1. This embodiment of the indoor unit of the air conditioner has a heating mode, offering multiple functions. Furthermore, because the hot air is output from the lower end of the casing during heating, its low density allows it to rise, improving the uniformity of heating and achieving a more comprehensive heating effect. Additionally, since the heater is located in the second air duct 32, the air heated by the heat exchanger in the air inlet duct is reheated by the heater when it is output from the second air duct, further improving the heating effect.

[0044] In some embodiments, such as Figures 1 to 5As shown, the indoor unit of the air conditioner also includes a first air guide plate 71 located at the upper end of the housing 1 and a second air guide plate 72 located at the lower end of the housing 1. In the embodiment shown, the first air guide plate 71 is hinged to the housing 1 and is driven to rotate relative to the housing 1 by means of a motor drive, etc. The second air guide plate 72 is hinged to the housing 1 and is driven to rotate relative to the housing 1 by means of a motor drive, etc. The fan component 4 includes a cross-flow fan, which includes an impeller 41, a volute 42, and a rotating duct wall 43. The cross-flow fan, also known as a cross-flow fan, was proposed by the French engineer Mortier in 1892. Its impeller is multi-bladed, long cylindrical, and has forward-curving multi-bladed blades. The structure of the cross-flow fan includes the impeller, the rotating duct wall (also referred to as the volute in some documents), and the volute tongue. By using a rotating duct wall to partially obstruct the outer circumference of the impeller and a volute tongue to separate the inlet and outlet sides of the impeller's outer circumference, the vortex center of the vortex entering the impeller moves closer to the volute tongue. Thus, when the impeller rotates, the airflow enters from the unobstructed inlet side of the impeller's outer circumference, passes through the impeller's interior, and exits from the fan outlet between the rotating duct wall and the volute tongue, forming the working airflow. Both the rotating duct wall and the volute tongue are important working components of the cross-flow fan.

[0045] In cooling mode, such as Figure 1 As shown, the fan outlet formed by the volute tongue 42 and the rotating duct wall 43 of the cross-flow fan is connected to the first duct 31. The first guide plate 71 opens the first duct 31, and the second guide plate 72 closes the second duct 32. The cross-flow fan drives air into the housing from the inlet duct, where it is cooled by the heat exchanger. After passing through the cross-flow fan, the air is output from the fan outlet formed by the volute tongue 42 and the rotating duct wall 43 into the first duct, and then exits the housing from the first duct. In dehumidification mode, as... Figure 4 As shown, the fan outlet formed by the volute tongue 42 and the rotating duct wall 43 of the cross-flow fan is connected to the second duct 32. The first guide plate 71 closes the first duct 31, and the second guide plate 72 opens the second duct 32. The cross-flow fan drives air into the housing from the inlet duct. After passing through the cross-flow fan, the air is output from the fan outlet formed by the volute tongue 42 and the rotating duct wall 43 into the second duct. Then, the air is heated by the heater in the second duct and output from the second duct to the housing. In heating mode, as... Figure 3As shown, the fan outlet formed by the volute 42 of the cross-flow fan and the rotating duct wall 43 is connected to the second duct 32. The first guide plate 71 closes the first duct 31, and the second guide plate 72 opens the second duct 32. The cross-flow fan drives the air to enter the housing from the inlet duct. During the flow process in the inlet duct, the air is first heated by the heat exchanger 5. Then, after passing through the cross-flow fan, the air is output from the fan outlet formed by the volute 42 and the rotating duct wall 43 into the second duct. Then, it is heated by the heater in the second duct and output from the second duct to the housing. The volute 42 of the cross-flow fan and the rotating duct are relatively fixed and rotated to switch the connection between the fan outlet formed by the volute 42 and the second duct 32. This embodiment uses a first air guide plate, a second air guide plate, and a cross-flow fan. The rotation of the cross-flow fan's volute 42 and the rotating air duct allows the indoor unit of the air conditioner to switch between cooling mode, dehumidification mode, and heating mode effectively and reliably, ensuring the proper functioning of the cooling, dehumidification, and heating modes of the indoor unit.

[0046] In some embodiments, such as Figures 1 to 6 As shown, the cross-flow fan also includes a duct disc 44 coaxial with and rotatable relative to the impeller 41. The volute tongue 42 and the rotating duct wall 43 are fixed on the duct disc 44. In this embodiment, when the indoor unit of the air conditioner switches modes, the impeller of the cross-flow fan does not rotate. The direction of the airflow from the cross-flow fan can be changed by rotating the duct disc 44. Since the impeller does not need to rotate, the mass of the duct disc that needs to be driven to rotate is small, thus the power required to drive the duct disc to rotate is small, saving energy. The rotation of the rotating duct wall and the volute tongue of the cross-flow fan is also more convenient and flexible.

[0047] In some embodiments, such as Figures 1 to 6 As shown, the indoor unit of the air conditioner also includes a front panel 8 located at the front end of the housing 1. The front panel 8 is movably disposed relative to the housing 1 such that the bottom end of the front panel 8 opens between itself and the housing 1 to form a first air inlet 81, and the top end of the front panel 8 opens between itself and the housing 1 to form a second air inlet 82. In cooling mode, the bottom end of the front panel 8 opens between itself and the housing 1 to form the first air inlet 81, which communicates with the air intake duct 2. In dehumidification mode, the top end of the front panel 8 opens between itself and the housing 1 to form the second air inlet 82, which communicates with the air intake duct 2. In this embodiment, the air inlet of the indoor unit of the air conditioner is formed by the opening of the front panel 8 relative to the housing 1. Thus, when the indoor unit of the air conditioner is off, such as... Figure 1 As shown, both the upper and lower ends of the front panel 8 abut against the front end of the housing 1. Compared with related technologies that require a certain distance to be reserved for the air inlet and a special baffle to open and close the air inlet, this simplifies the structure of the indoor air conditioning unit. Furthermore, the air inlet is formed by the movement of the front panel 8 relative to the housing 1, thus... Figure 1As shown, in the off state, there is no dedicated air inlet occupying thickness, thus making the indoor unit of the air conditioner thinner. In cooling, dehumidifying, and heating modes, the distance between the air inlet and the outlet of the air duct is greater, further reducing interference between the intake and exhaust air.

[0048] In some embodiments, such as Figures 1 to 6 As shown, in some embodiments of this application, the front panel 8 is an arc-shaped plate, and the front panel 8 includes arc-shaped segments located at the upper and lower ends respectively, so that when the air conditioner indoor unit is turned off, the upper and lower ends of the front panel 8 abut against the housing 1 to form a sealed abutment. Moreover, the two ends of the front panel 8 are set as arc-shaped segments, which guide and cover the airflow entering the air intake duct.

[0049] In some embodiments, the indoor unit of the air conditioner further includes a first telescopic mechanism disposed between the bottom end of the front panel 8 and the housing 1, and a second telescopic mechanism disposed between the top end of the front panel 8 and the housing 1. The first telescopic mechanism extends and the second telescopic mechanism retracts to open the space between the bottom end of the front panel 8 and the housing 1 to form a first air inlet 81. The second telescopic mechanism extends and the first telescopic mechanism retracts to open the space between the bottom end of the front panel 8 and the housing 1 to form a second air inlet 82. In some embodiments, the first telescopic mechanism and the second telescopic mechanism include telescopic cylinders, such as telescopic air cylinders. The cylinder barrel and piston of the telescopic air cylinder are hinged to the housing 1 and the front panel, respectively. The extension and retraction of the telescopic mechanism are achieved by extending and retracting the piston in the telescopic air cylinder. This embodiment controls the opening of the first air inlet 31 or the second air inlet 32 ​​by setting the extension and retraction of the first telescopic mechanism and the second telescopic mechanism, which has a simple structure and is easy to control.

[0050] In some embodiments, an air conditioning system is also disclosed, such as Figures 7-9As shown, the air conditioning system includes a compressor 91, a condenser 92, a throttling device, and any of the aforementioned indoor air conditioning units connected in sequence. The throttling device is connected to a heat exchanger 5, and the heat exchanger 5 is connected to the compressor 91. In cooling mode, the compressed refrigerant output from the compressor 91 enters the condenser 92 for cooling. After cooling and depressurization, the refrigerant undergoes adiabatic expansion through the throttling device, becoming a low-temperature, low-pressure refrigerant that enters the heat exchanger 5. In the heat exchanger 5, the air entering the air inlet duct is cooled. The cooled air flows out from the fan assembly to the air outlet duct and then exits the casing 1. The refrigerant that has passed through the heat exchanger 5 flows out from the heat exchanger 5 and enters the compressor 91 for compression. In dehumidification mode, the compressed refrigerant output from compressor 91 enters condenser 92 for cooling. After cooling and depressurization, it undergoes adiabatic expansion through a throttling device, becoming low-temperature, low-pressure refrigerant that enters heat exchanger 5. In heat exchanger 5, the air entering the air inlet duct is cooled. The cooled air flows out from the fan assembly to the air outlet duct, where it is heated by a heater located within the air outlet duct before exiting the casing 1. The refrigerant, having passed through heat exchanger 5, flows out from heat exchanger 5 and enters compressor 91 for compression. In this embodiment, compressor 91 can be arranged inside casing 1; in some embodiments, compressor 91 can also be arranged outside casing 1.

[0051] In some embodiments, such as Figure 6-9 As shown, the heater 6 is connected to a throttling device and a compressor 91 at its two ends, respectively. In dehumidification mode, the compressor 91 supplies refrigerant to the heater 6 to heat the air output from the air outlet duct 3. In this embodiment, the heater 6 is a fluid heat exchanger, which heats the air passing through the heater by introducing high-temperature refrigerant. In dehumidification mode, as... Figure 8 A portion of the refrigerant output from the compressor is fed into heater 6 to heat the air in the outlet duct. After being cooled by heater 6, the refrigerant flows into the throttling device, undergoes adiabatic expansion, and then merges into heat exchanger 5 to cool the air in the inlet duct before returning to the compressor. Specifically, as shown... Figure 8 In the illustrated embodiment, a portion of the refrigerant output from the compressor is introduced into the heater 6 to heat the air in the outlet duct. The remaining portion passes through ports D and C of the first four-way valve and enters the condenser 92 for cooling. It then merges with the refrigerant output from the heater via the second throttling valve 932 after passing through the third expansion valve 933, and then through the first expansion valve 931 into the heat exchanger 5 to cool and dehumidify the air passing through the inlet duct. Finally, the refrigerant exits from the heat exchanger 5 and flows into the compressor through ports E and S of the second four-way valve. In this embodiment, the heater uses refrigerant to heat the air in dehumidification mode. The heat source for the heater is a heat pump system, resulting in high heating efficiency.

[0052] In some embodiments, the heater may also be an electric heater.

[0053] In some embodiments, such as Figure 9 As shown, the indoor unit of the air conditioner also has a heating mode. In heating mode, the compressor 91 supplies refrigerant to the heat exchanger 5 and the heater 6 respectively to heat the air entering the air inlet duct 2 and the air exiting the air outlet duct 3. In heating mode, the compressor 91 supplies refrigerant to the heater 6 to heat the air exiting the air outlet duct 3. In this embodiment, the heater 6 is a fluid heat exchanger, which heats the air passing through the heater by introducing high-temperature refrigerant. In heating mode, as... Figure 9 Part of the refrigerant output from the compressor is fed into heater 6 to heat the air in the outlet duct, while the other part flows into heat exchanger 5 to heat the air in the inlet duct. After being cooled by heater 6, the refrigerant, along with the refrigerant flowing through heat exchanger 5, flows into the throttling device. After adiabatic expansion, it enters condenser 92 for heat absorption and temperature increase, and then flows into the compressor. Specifically, as shown... Figure 9 In the illustrated embodiment, a portion of the refrigerant output from the compressor is fed into heater 6 to heat the air in the outlet duct, while the other portion passes through port D and port E of the second four-way valve into heat exchanger 5 to heat the air in the inlet duct. It then merges with the second throttling expansion valve 931 after passing through the second throttling expansion valve 932, and flows into condenser 92 through third throttling expansion valve 933 for heat absorption and temperature increase. Finally, it flows into compressor through ports C and S of the first four-way valve. In the embodiment shown, ports E and C of the first and second four-way valves are connected to the pipeline via capillary tubes. In this embodiment, the heater uses refrigerant inflow for heating in heating mode, and the refrigerant in the heater undergoes heat pump circulation, resulting in high heating efficiency.

[0054] In some embodiments, the indoor unit of the air conditioner is a wall-mounted air conditioner. In this embodiment, the wall-mounted air conditioner is installed on the wall for use. At this time, the front panel 8 is located on the front side away from the wall, the outlet of the first air duct is located at the upper end of the housing 1, and the outlet of the second air duct is located at the lower end of the housing 1.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. An indoor unit for an air conditioner, characterized in that, It has cooling and dehumidification modes, including: Shell (1); Air intake duct (2); Air outlet duct (3); A fan component (4) is disposed inside the housing (1) and is used to drive external air into the housing (1) through the air inlet duct (2) and out of the housing (1) through the air outlet duct (3); A heat exchanger (5) is provided in the air inlet duct (2) to exchange heat with the air passing through the air inlet duct (2). In the cooling mode and dehumidification mode, a refrigerant is introduced into the heat exchanger (5) to cool the air entering the air inlet duct (2). A heater (6) is provided inside the air outlet duct (3). In dehumidification mode, the heater (6) heats the air output from the air outlet duct (3).

2. The air conditioner indoor unit as described in claim 1, characterized in that, The air outlet duct (3) includes a first air duct (31) with its outlet located at the upper end of the housing (1) and a second air duct (32) with its outlet located at the lower end of the housing (1). The heater (6) is located in the second air duct (32). In the cooling mode, the fan component (4) drives air to exit the housing (1) from the first air duct (31). In the dehumidification mode, the fan component (4) drives air to be heated by the heater (6) in the second air duct (32) and then exits the housing (1) from the second air duct (32).

3. The air conditioner indoor unit as described in claim 2, characterized in that, It also has a heating mode. In the heating mode, refrigerant is introduced into the heat exchanger (5) to heat the air entering the air inlet duct (2). The fan component (4) drives the air to be heated by the heater (6) in the second air duct (32) and then outputs the shell (1) from the second air duct (32).

4. The air conditioner indoor unit as described in claim 3, characterized in that, It also includes a first air guide plate (71) disposed at the upper end of the housing (1) and a second air guide plate (72) disposed at the lower end of the housing (1). The fan component (4) includes a cross-flow fan, which includes an impeller (41), a volute (42), and a rotating duct wall (43). In cooling mode, the fan outlet formed by the volute (42) and the rotating duct wall (43) of the cross-flow fan is connected to the first duct (31). The first air guide plate (71) opens the first duct (31), and the second air guide plate (72) closes the second duct (32). In dehumidification mode, the fan outlet formed by the volute (42) and the rotating duct wall (43) of the cross-flow fan is closed. Connected to the second air duct (32), the first air guide plate (71) closes the first air duct (31), and the second air guide plate (72) opens the second air duct (32). In heating mode, the fan outlet formed by the volute tongue (42) of the cross-flow fan and the rotating air duct wall (43) is connected to the second air duct (32). The first air guide plate (71) closes the first air duct (31), and the second air guide plate (72) opens the second air duct (32). The volute tongue (42) of the cross-flow fan and the rotating air duct are relatively fixed and rotated to switch the fan outlet formed therein between being connected to the first air duct (31) and being connected to the second air duct (32).

5. The air conditioner indoor unit as described in claim 4, characterized in that, The cross-flow fan also includes a duct turntable (44) that is coaxial with and rotatable relative to the impeller (41), and the volute tongue (42) and the rotating duct wall (43) are fixed on the duct turntable (44).

6. The air conditioner indoor unit as described in any one of claims 2 to 5, characterized in that, It also includes a front panel (8) disposed at the front end of the housing (1). The front panel (8) is movably disposed relative to the housing (1) such that the bottom end of the front panel (8) opens between the housing (1) to form a first air inlet (81) and the top end of the front panel (8) opens between the housing (1) to form a second air inlet (82). In the cooling mode, the bottom end of the front panel (8) opens between the housing (1) to form the first air inlet (81), and the first air inlet (81) is connected to the air intake duct (2). In the dehumidification mode, the top end of the front panel (8) opens between the housing (1) to form the second air inlet (82), and the second air inlet (82) is connected to the air intake duct (2).

7. The air conditioner indoor unit as described in claim 6, characterized in that, It also includes a first telescopic mechanism disposed between the bottom end of the front panel (8) and the housing (1) and a second telescopic mechanism disposed between the top end of the front panel (8) and the housing (1). The first telescopic mechanism extends and the second telescopic mechanism retracts to open the space between the bottom end of the front panel (8) and the housing (1) to form a first air inlet (81). The second telescopic mechanism extends and the first telescopic mechanism retracts to open the space between the bottom end of the front panel (8) and the housing (1) to form a second air inlet (82).

8. An air conditioning system, characterized in that, The unit includes a compressor (91), a condenser (92), a throttling device, and an indoor air conditioning unit as described in any one of claims 1 to 7, connected in sequence. The throttling device is connected to the heat exchanger (5), and the heat exchanger (5) is connected to the compressor (91).

9. The air conditioning system as described in claim 8, characterized in that, The heater (6) is connected to the throttling device and the compressor (91) at both ends respectively. In dehumidification mode, the compressor (91) supplies refrigerant to the heater (6) to heat the air output from the air outlet duct (3).

10. The air conditioning system as described in claim 9, characterized in that, The indoor unit of the air conditioner also has a heating mode. In the heating mode, the compressor (91) supplies refrigerant to the heat exchanger (5) and the heater (6) respectively to heat the air entering the air inlet duct (2) and the air output from the air outlet duct (3).

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