CN214406255U

CN214406255U - Machine and air conditioner in air conditioning

Info

Publication number: CN214406255U
Application number: CN202023016334.8U
Authority: CN
Inventors: 李宝华; 张卫东; 孙泽成
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-10-15
Anticipated expiration: 2030-12-15

Abstract

The application provides an air conditioner indoor unit, which comprises a shell, a fan assembly, a heat exchanger and a sterilization module, wherein the shell is provided with a first air port, a second air port and an air flow channel; the fan assembly divides the airflow channel into a first sub-flow channel and a second sub-flow channel, the first air opening is communicated with the first sub-flow channel, the second air opening is communicated with the second sub-flow channel, and the fan assembly can selectively exhaust air towards the first sub-flow channel or the second sub-flow channel; the first sub-flow passage and/or the second sub-flow passage are/is internally provided with a heat exchanger, the sterilization module is arranged in the airflow passage, and under the air purification mode, indoor air enters the airflow passage through the air return opening, flows through the sterilization module and is discharged from the first air opening or the second air opening. According to the embodiment of the application, the airflow flowing direction of the airflow channel can be switched by changing the rotating direction of the impeller of the fan assembly, the structure is simple, and the reliability is high; in addition, the air purification function is integrated, indoor air is circularly sterilized, and indoor air quality can be effectively improved.

Description

Machine and air conditioner in air conditioning

Technical Field

The application relates to the technical field of air conditioning, in particular to an air conditioner indoor unit and an air conditioner.

Background

In the related art, a scheme for realizing air outlet from different air outlets through a guide plate is provided for an air-conditioning indoor unit, specifically, the same air inlet is adopted for air inlet, and a wind deflector selectively closes a part of air outlets according to air outlet requirements and only keeps the air outlets needing air outlet. In the scheme, even if basic functions of cooling and heating are realized, the opening is additionally arranged on the appearance surface of the air-conditioning indoor unit, the distance between the air outlets cannot be too far, otherwise the air supply resistance of the fan and the complexity of the air channel can be obviously increased, in addition, the existing air-conditioning indoor unit can only realize the heating and cooling functions basically, the function is single, and a user needs to buy an air purifier to purify the indoor air.

SUMMERY OF THE UTILITY MODEL

In view of this, it is desirable to provide an air conditioner indoor unit and an air conditioner with simple structure and high integration level.

In order to achieve the above object, an embodiment of the present application provides an indoor unit of an air conditioner, including:

the air conditioner comprises a shell, a first air inlet, a second air inlet and an air flow channel, wherein the shell is provided with the first air inlet, the second air inlet and the air flow channel;

the fan assembly is arranged in the airflow channel to divide the airflow channel into a first sub-channel and a second sub-channel, the first air opening is communicated with the first sub-channel, the second air opening is communicated with the second sub-channel, and the fan assembly can selectively air out towards the first sub-channel or the second sub-channel so that the indoor unit of the air conditioner can selectively air out from the first air opening or the second air opening.

The heat exchanger is arranged in the first sub-flow passage and/or the second sub-flow passage;

the air conditioner indoor unit is provided with an air purification mode, and under the air purification mode, indoor air enters the air flow channel through the air return opening, flows through the sterilization module and is discharged from the first air opening or the second air opening.

In some embodiments, the indoor air conditioner comprises a heating mode and a cooling mode, and in the cooling mode, the indoor air conditioner enters air from the second air opening and exits air from the first air opening; and in the heating mode, the air conditioner indoor unit enters air from the first air opening and exits air from the second air opening.

In some embodiments, the first tuyere is located in an upper portion of the housing, and the second tuyere is located in a lower portion of the housing.

In some embodiments, the housing has a fresh air inlet in communication with the airflow channel, and the airflow from the fresh air inlet flows through the heat exchanger and exits the first or second air ports.

In some embodiments, the indoor unit of the air conditioner comprises a first opening and closing door, and the first opening and closing door is arranged at the fresh air inlet in an opening and closing mode; the air conditioner indoor unit comprises a second switch door, the first switch door and the second switch door are located on the same side of the fan assembly in the airflow flowing direction, and the second switch door can be arranged at the corresponding first air port or the second air port in an opening and closing mode.

In some embodiments, the first tuyere, the second tuyere, and the return tuyere are independent of each other; or one of the first air port and the second air port and the air return port are the same port on the shell.

In some embodiments, the casing has a fresh air inlet communicated with the airflow channel, the fresh air inlet and the heat exchanger are located on opposite sides of the fan assembly along the airflow flowing direction, the indoor unit of the air conditioner comprises a filter screen, and the airflow from the fresh air inlet sequentially flows through the filter screen and the heat exchanger without flowing through the sterilization module.

In some embodiments, in the air purification mode, the fan assembly is in an operational state and the heat exchanger is in a non-operational state.

In some embodiments, the sterilization module comprises a dust removal net, a formaldehyde filter net and a plasma net which are arranged in sequence along the flowing direction of the air flow, and the plasma net faces to the air outlet side of the sterilization module.

In some embodiments, the fan assembly is a counter-rotating axial fan, and the first sub-flow passage and the second sub-flow passage are located on axially opposite sides of the counter-rotating axial fan.

In some embodiments, the counter-rotating axial flow fan comprises two impellers coaxially arranged, the chord length of the root of each impeller is L1, the axial distance between the two impellers is L2, the ratio of L1 to L2 is 0.4-0.7, and L2 is not less than 5 mm. The embodiment of the application also provides an air conditioner, which comprises an air conditioner outdoor unit and any one of the air conditioner indoor units, wherein the air conditioner outdoor unit is connected with the air conditioner indoor unit through a refrigerant pipe.

The embodiment of the application still provides another kind of air conditioner, machine in the air conditioning of including air condensing units and above-mentioned part embodiment, air condensing units includes for the heat exchanger provides the compressor of refrigerant, works as airflow channel follows the new trend entry air inlet, the operating frequency of compressor is no longer than 20 hertz.

The air conditioner indoor unit of the embodiment of the application can enable airflow to reversely flow by changing the rotation direction of the impeller of the fan assembly, so that the airflow flowing direction of the airflow channel is switched. Specifically, when the impeller of the fan assembly rotates in the current direction, the airflow flows from the first sub-flow channel to the second sub-flow channel, the airflow in the second sub-flow channel is exhausted from the second air opening, when the impeller of the fan assembly rotates in the reverse direction, the airflow flows from the second sub-flow channel to the first sub-flow channel, and the airflow in the first sub-flow channel is exhausted from the first air opening. That is, the reverse flow of the airflow can be realized without arranging other flow channel switching parts, so that the air outlet position is changed, the structure is simple, and the reliability is high; in addition, the air conditioning indoor unit of this application embodiment has integrateed the air purification function, and when the user needs the indoor air-purifying, only need with the indoor work of air conditioner can in the air purification mode, the module that disinfects circulates the indoor air and disinfects, can effectively improve the indoor air quality.

Drawings

Fig. 1 is a schematic structural view of an indoor unit of an air conditioner according to a first embodiment of the present application;

fig. 2 is a schematic view of the indoor unit of the air conditioner shown in fig. 1 in a cooling mode, in which broken lines and arrows indicate airflow flow paths;

fig. 3 is a schematic view of the indoor unit of the air conditioner shown in fig. 1 in a heating mode, in which dotted lines and arrows indicate airflow flow paths;

fig. 4 is a schematic view of the indoor unit of the air conditioner shown in fig. 1 in a fresh air mode, wherein dotted lines and arrows indicate airflow flow paths;

fig. 5 is a schematic structural view of an indoor unit of an air conditioner according to a second embodiment of the present application;

fig. 6 is a schematic structural view of an indoor unit of an air conditioner according to a third embodiment of the present application;

fig. 7 is a schematic structural view of an indoor unit of an air conditioner according to a fourth embodiment of the present application;

fig. 8 is a schematic structural view of an indoor unit of an air conditioner according to a fifth embodiment of the present application;

fig. 9 is a schematic structural view of an indoor unit of an air conditioner according to a sixth embodiment of the present application;

fig. 10 is a schematic structural view of an indoor unit of an air conditioner according to a seventh embodiment of the present application;

fig. 11 is a schematic structural diagram of a first impeller of a fan assembly according to an embodiment of the present application.

The reference numerals describe the housing 1; a first tuyere 1 a; a second tuyere 1 b; a fresh air inlet 1 c; an air return opening 1 d; an airflow passage 10; a first sub-flow path 101; a second sub-flow channel 102; a heat exchanger 2; a fan assembly 3; an impeller 31; a sterilization module 4; a dust removing net 41; a formaldehyde filter screen 42; a plasma screen 43; a filter screen 5; a first arc-shaped baffle 61; a second arcuate baffle 62; a first switch door 71; second switch door 72

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the description of the embodiments of the present application, "upper", "lower", "lateral", "orientation or positional relationship is an orientation or positional relationship shown on the basis of the drawings, it being understood that these orientation terms are merely for convenience of describing the present application and for simplicity of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus should not be construed as limiting the present application.

An air-conditioning indoor unit, please refer to fig. 1 to 10, includes a casing 1, a fan assembly 3, a heat exchanger 2 and a sterilization module 4.

The casing 1 is provided with a first tuyere 1a, a second tuyere 1b, a return tuyere 1d, and an airflow passage 10. The fan assembly 3 is disposed in the airflow channel 10 to divide the airflow channel 10 into a first sub-flow passage 101 and a second sub-flow passage 102, the first air opening 1a is communicated with the first sub-flow passage 101, the second air opening 1b is communicated with the second sub-flow passage 102, and the fan assembly 3 can change the rotation direction of the impeller to selectively output air toward the first sub-flow passage 101 or the second sub-flow passage 102, so that the indoor air conditioner can selectively output air from the first air opening 1a or the second air opening 1 b. The heat exchanger 2 is disposed in the first sub-channel 101 and/or the second sub-channel 102.

The sterilization module 4 is arranged in the airflow channel 10, the air-conditioning indoor unit has an air purification mode, and in the air purification mode, indoor air enters the airflow channel 10 through the air return opening 1d, flows through the sterilization module 4, and is discharged from the first air opening 1a or the second air opening 1 b. For example, taking the air return opening 1d located in the first sub-flow passage 101 as an example, when the air conditioning indoor unit is in the air purification mode, the first sub-flow passage 101 can only intake air from the air return opening 1d, so that the air flow entering the first sub-flow passage 101 from the air return opening 1d flows through the sterilization module 4, and thus the circular sterilization and disinfection can be performed efficiently.

In the air-conditioning indoor unit according to the embodiment of the present application, the airflow can flow in the opposite direction by changing the rotation direction of the impeller of the fan assembly 3, so as to switch the airflow flowing direction of the airflow channel 10. Specifically, when the impeller of the fan assembly 3 rotates in the current direction, the airflow flows from the first sub-flow passage 101 to the second sub-flow passage 102, the airflow in the second sub-flow passage 102 is blown out from the second air opening 1b, and when the impeller of the fan assembly 3 rotates in the opposite direction, the airflow flows from the second sub-flow passage 102 to the first sub-flow passage 101, and the airflow in the first sub-flow passage 101 is blown out from the first air opening 1 a. That is to say, need not to set up other runner switching parts, can realize the air current reverse flow, and then change the air-out position, simple structure, reliability height.

In addition, the air conditioner indoor unit of the embodiment of the application integrates the air purification function, is high in integration level and is multipurpose; when the user need purify the room air, only need with the air conditioner indoor work in the air purification mode can, the module that disinfects carries out circulation sterilization to the room air, can effectively improve the room air quality.

It should be noted that the heat exchanger 2 is disposed in the first sub-channel 101 and/or the second sub-channel 102, which includes three cases, the first case: the heat exchanger 2 is arranged only in the first sub-channel 101; and the second method comprises the following steps: the heat exchanger 2 is disposed only in the second sub-flow passage 102; and the third is that: the first sub-flow passage 101 is provided with the heat exchanger 2 therein, and the second sub-flow passage 102 is also provided with the heat exchanger 2 therein. When one heat exchanger 2 can also satisfy the heat exchange demand for cooling/heating, only one heat exchanger 2 may be provided. In the embodiment of the present application, an example in which one heat exchanger 2 is provided will be described.

The indoor unit of the air conditioner comprises a heating mode and a cooling mode, please refer to fig. 2, in the cooling mode, the indoor unit of the air conditioner enters air from the second air port 1b and exits air from the first air port 1 a; referring to fig. 3, in the heating mode, the indoor unit of the air conditioner enters air from the first air inlet 1a and exits air from the second air inlet 1 b. In this embodiment, in the case of realizing the basic heating and cooling functions, the air inlet and outlet functions of the first tuyere 1a and the second tuyere 1b can be interchanged to reduce the number of openings in the casing 1.

It should be noted that the casing 1 may be placed vertically, for example, a cabinet air conditioner, and the casing 1 may be placed horizontally along a horizontal wind direction, for example, a wall-mounted air conditioner indoor unit.

Exemplarily, referring to fig. 1 to 9, the housing 1 is vertically disposed, the first tuyere 1a is located at an upper portion of the housing 1, and the second tuyere 1b is located at a lower portion of the housing 1, that is, the first tuyere 1a is higher than the second tuyere 1 b. In the cooling mode, please refer to fig. 2, the indoor unit of the air conditioner exhausts air from the first air port 1a, and in the heating mode, please refer to fig. 3, the indoor unit of the air conditioner exhausts air from the second air port 1 b. In this embodiment, during cooling, after the cold airflow is discharged from the first air opening 1a above, the cold airflow sinks from a high position to a low position, forming a waterfall type air supply. When heating, the hot air is discharged from the second air port 1b below and then rises from the low position to the high position, so as to form floor heating type air supply. In the embodiment, no matter refrigeration or heating is carried out, the uniformity of indoor temperature can be improved, and the user experience is improved.

Illustratively, the housing 1 has a fresh air inlet 1c communicating with the air flow channel 10, and the air flow from the fresh air inlet 1c flows through the heat exchanger 2 and is discharged from the first tuyere 1a or the second tuyere 1 b. That is, the indoor unit of the air conditioner has a fresh air mode, and referring to fig. 3, in the fresh air mode, the indoor unit of the air conditioner enters air from the fresh air inlet 1c and is discharged from the first air inlet 1a or the second air inlet 1 b. From the new trend of outdoor tonifying suction, can promote the new freshness of room air, improve the sense of vexation of room air, promote user experience and feel.

It should be noted that, the exhaust from the first air opening 1a or the second air opening 1b means that when the fresh air inlet 1c is communicated with the first sub-flow passage 101, the airflow from the fresh air inlet 1c firstly enters the first sub-flow passage 101, then flows through the fan assembly 3 and enters the second sub-flow passage 102, and finally is exhausted from the second air opening 1 b; when the fresh air inlet 1c is communicated with the second sub-flow passage 102, the air flow from the fresh air inlet 1c firstly enters the second sub-flow passage 102, then flows through the fan assembly 3 and enters the first sub-flow passage 101, and finally is discharged from the first air opening 1 a.

In the embodiment with only one heat exchanger 2, the fresh air inlet 1c and the heat exchanger 2 are located on opposite sides of the fan assembly 3 in the direction of airflow, so that the arrangement of the fresh air inlet 1c and the heat exchanger 2 is facilitated.

As shown in fig. 1 to 10, the indoor unit of an air conditioner further includes a filter 5, and an airflow from the fresh air inlet 1c flows through the filter 5. The filter screen 5 can intercept substances such as pollen, dust and the like wrapped in the outdoor fresh air, and plays a role in purifying the fresh air entering the room. The specific type of the Filter screen 5 is not limited, and for example, HEPA (High efficiency particulate air Filter) is used. It should be noted that the screen 5 does not provide a large wind resistance to the fan assembly 3. Generally speaking, the indoor chance of air conditioner will outdoor new trend water conservancy diversion to new trend entry 1c through external new trend pipe, and the new trend pipe can pass the wall body, and consequently, the pipe diameter of new trend pipe is less relatively, and pipeline resistance is great relatively, consequently, should avoid filter screen 5 too much to increase the windage as far as possible, avoids leading to the new trend undersize.

Illustratively, the air-conditioning indoor unit comprises a first switch door 71, and the first switch door 71 is openably and closably arranged at the fresh air inlet 1c to regulate the fresh air flow; the air conditioning indoor unit includes a second opening and closing door 72, and the first opening and closing door 71 and the second opening and closing door 72 are located on the same side of the fan assembly 3 along the airflow flowing direction, that is, the first opening and closing door 71 and the second opening and closing door 72 may be both disposed in the first sub-flow passage 101 and also both disposed in the second sub-flow passage 102. The second switching door 72 is openably and closably disposed at the corresponding first tuyere 1a or the second tuyere 1b to adjust the return air flow, and specifically, when the first switching door 71 and the second switching door 72 are both disposed in the first sub-flow passage 101, the second switching door 72 is disposed at the first tuyere 1a to selectively open or close the first tuyere 1 a. When the first opening and closing door 71 and the second opening and closing door 72 are disposed in the second sub flow passage 102, the second opening and closing door 72 is disposed at the second tuyere 1b to selectively open or close the second tuyere 1 b.

For example, the first opening/closing door 71 and the second opening/closing door 72 are located in the second sub-flow passage 102. When the indoor unit of the air conditioner is in the fresh air mode, the first switching door 71 is in a fully opened or partially opened state, the second switching door 72 is in a fully closed or partially closed state, and the fresh outdoor air is pumped into the second sub-flow passage 102 under the action of negative pressure.

It should be noted that, when the second switch door 72 is completely closed, the second sub-channel 102 only draws in fresh air from the fresh air inlet 1c, and when the second switch door 72 is partially closed, the second sub-channel 102 simultaneously draws in air from the fresh air inlet 1c and the second air inlet 1b, and the fresh air entering from the fresh air inlet 1c and the indoor return air entering from the second air inlet 1b are mixed in the second self-channel, and by adjusting the opening ranges of the first switch door 71 and the second switch door 72, the mixing ratio of the fresh air and the return air can be adjusted, so as to adjust the mixing ratio of the fresh air and the return air according to the indoor air quality.

The specific type of the sterilization module 4 is not limited, and the sterilization module 4 having the sterilization and disinfection functions for different pollutants can be selected according to actual use scenes. Illustratively, the sterilization module 4 includes a dust removal net 41, a formaldehyde filter net 42 and a plasma net 43 arranged in sequence along the flow direction of the air flow, and the plasma is directed to the air outlet side of the sterilization module 4. The specific material of the dust removing net 41 is not limited as long as the preliminary dust removing function can be achieved. The formaldehyde filter screen 42 has a function of efficiently absorbing formaldehyde, and can also filter out other volatile organic compounds, allergens, bacteria and the like. The plasma net 43 sterilizes the air flow in the air flow passage 10 on the air-out side of the sterilization and disinfection by means of ion emission. The setting position of the sterilization module 4 is not limited, and for example, the sterilization module 4 is arranged at the air return opening 1d to sterilize and disinfect the indoor return air entering the air return opening 1d, so that the air flow entering the air flow channel 10 is clean air flow.

In the embodiment having both the fresh air inlet 1c and the air return 1d, the air flow from the fresh air inlet 1c flows through the filter screen 5 and the heat exchanger 2 in sequence, and does not flow through the sterilization module 4. The sterilization module 4 has a relatively large wind resistance, and therefore, in order to ensure that the fan assembly 3 can smoothly pump in fresh air, the fresh air should be prevented from flowing through the sterilization module 4.

In the air purification mode, the heat exchanger 2 may or may not operate, that is, when the heat exchanger 2 operates, the purified air flow sent out in the air purification mode passes through the heat exchange of the heat exchanger 2, and therefore, the temperature in the room can be adjusted simultaneously by the sent purified air flow.

Illustratively, in the air cleaning mode, the fan assembly 3 is in an operating state and the heat exchanger 2 is in a non-operating state. The non-working state means that no refrigerant flows in the heat exchanger 2, and the heat exchanger 2 neither cools nor heats. When a user selects an air purification mode, only the fan assembly 3 works, and the indoor unit of the air conditioner circularly sterilizes indoor air to improve indoor air quality; because the heat exchanger 2 is in a non-working state, the temperature of the discharged airflow is room temperature, the change of the room temperature is not influenced, and the energy-saving effect can be achieved.

In some embodiments, referring to fig. 1 to 4 and fig. 6 to 10, one of the first air inlet 1a and the second air inlet 1b and the air return inlet 1d may be the same opening on the housing 1, that is, one of the first air inlet 1a and the second air inlet 1b has the function of the air return inlet 1 d.

In other embodiments, referring to fig. 5, the air return opening 1d, the first opening 1a, and the second opening 1b are independent from each other. The indoor unit of the air conditioner includes a third switch door, and the third switch door and the air return opening 1d are located on the same side of the fan assembly 3 along the airflow flowing direction, that is, the third switch door and the air return opening 1d may both be located in the first sub-flow passage 101 or both may be located in the second sub-flow passage 102. The third switch door is openably and closably provided at the return air inlet 1 d. For example, when the fresh air mode is turned on, the third opening/closing door closes the return air opening 1d, and the second opening/closing door 72 closes the first air opening 1a or the second air opening 1b as the air inlet.

It should be noted that the third switching gate may be integrated with the second switching gate 72, or may be provided independently. Exemplarily, referring to fig. 5, the third switching door and the second switching door 72 are integrated, and in the air cleaning mode, the second switching door 72 only closes the first air inlet 1 a; in the fresh air mode, the second switch door 72 is horizontally arranged in the first sub-flow passage 101 to block the air flow of the return air inlet 1d and the first air inlet 1a, so that the fan assembly 3 can only intake air from the fresh air inlet 1 c.

Illustratively, the fan assembly 3 is a counter-rotating axial fan, and the first sub-flow passage 101 and the second sub-flow passage 102 are located on two axially opposite sides of the counter-rotating axial fan. Specifically, the counter-rotating axial flow fan comprises two impellers 31 which are coaxially arranged, the rotating directions of the two impellers 31 are opposite, the airflow moves along the same axial direction, the counter-rotating axial flow fan has the characteristics of large flow and high pressure, and the rotating directions of the two impellers 31 are changed, so that the airflow can be effectively reversely flowed.

Referring to fig. 11, the chord length of the root portion of the impeller 31 is L1, referring to fig. 1, the axial distance between the two impellers 31 is L2, the ratio of L1 to L2 is 0.4 to 0.7, and L2 is not less than 5 mm. In this embodiment, the noise and the air output of the counter-rotating axial flow fan are both at a preferable level.

For example, in some embodiments, referring to fig. 1 to 4 and 6 to 10, the indoor unit of an air conditioner includes at least one first arc-shaped flow guide plate 61 disposed in the first sub-flow passage 101, and the first arc-shaped flow guide plate 61 can deflect the air flow flowing between the fan assembly 3 and the first air inlet 1a by 80 ° to 100 °. For example 80 °, 90 °, 100 °. In this embodiment, the first tuyere 1a is located at one lateral side of the fan assembly 3, and the first arc-shaped guide plate 61 can deflect the air flow by about 90 ° to smoothly turn the air flow and reduce the vortex.

For example, in some embodiments, referring to fig. 1 to 10, the indoor unit of the air conditioner includes at least one second arc-shaped flow guiding plate 62 disposed in the second sub-flow passage 102, and the second arc-shaped flow guiding plate 62 can deflect the airflow flowing between the fan assembly 3 and the second air inlet 1b by 80 ° to 110 °, for example, 80 °, 90 °, 100 °. In this embodiment, the second tuyere 1b is located at one lateral side of the fan assembly 3, and the second arc-shaped deflector 62 can deflect the air flow by about 90 ° to smoothly turn the air flow and reduce the vortex.

Various embodiments of the present application will be described below with reference to the accompanying drawings.

First embodiment

Referring to fig. 1 to 4, in the embodiment, the housing 1 is disposed along a vertical direction, the first air opening 1a is located above the second air opening 1b, the fresh air inlet 1c, the sterilization module 4 and the filter screen 5 are all located in the second sub-flow passage 102, the heat exchanger 2 is located in the first sub-flow passage 101, the fresh air inlet 1c is located between the sterilization module 4 and the filter screen 5, and the filter screen 5 is located between the fresh air inlet 1c and the fan assembly 3.

The fan assembly 3 is a counter-rotating axial flow fan, and the circumferential direction of the fan assembly 3 is the up-down direction. The first tuyere 1a and the second tuyere 1b are both provided at one lateral side of the housing 1. The second air inlet 1b and the return air inlet 1d are integrated, that is, the second air inlet 1b has the function of the return air inlet 1 d.

The heat exchanger 2 is plate-shaped and is disposed in the first sub-flow passage 101 obliquely. The number of the first arc-shaped baffles 61 is plural.

The first opening/closing door 71 is provided at the fresh air inlet 1c, and the second opening/closing door 72 is provided at the second air port 1 b.

The air-conditioning indoor unit comprises a refrigeration mode, a heating mode, a fresh air mode and an air purification mode.

Referring to fig. 2, when the air conditioning indoor unit is in a cooling mode, the indoor air is sucked into the second sub-flow passage 102 from the first air inlet 1a under the action of the fan assembly 3, sequentially flows through the sterilization module 4, the filter screen 5 and the fan assembly 3, enters the first sub-flow passage 101, is changed into a cold air flow after being subjected to heat exchange with the heat exchanger 2, and is finally discharged from the first air inlet 1a above, and the discharged cold air flow falls under the action of gravity to form waterfall type air supply.

Referring to fig. 3, when the air conditioning indoor unit is in the heating mode, the indoor air is sucked into the first sub-flow passage 101 from the second air opening 1b under the action of the fan assembly 3, and becomes hot air after exchanging heat with the heat exchanger 2, and then flows through the fan assembly 3, enters the second sub-flow passage 102, and then flows through the filter screen 5 and the sterilization module 4 in sequence, and then is discharged from the first air opening 1a below, and the discharged hot air floats upwards, so as to form a floor heating type air supply.

Referring to fig. 4, when the air conditioning indoor unit is in the fresh air mode, the outdoor fresh air is sucked into the second sub-flow passage 102 from the fresh air inlet 1c under the action of the fan assembly 3, sequentially flows through the filter screen 5 and the fan assembly 3, enters the first sub-flow passage 101, exchanges heat with the heat exchanger 2, and is discharged from the first air port 1a to supplement fresh air to the room. It should be noted that, in the fresh air mode, the heat exchanger 2 can selectively heat or refrigerate the fresh air.

When the air conditioning indoor unit is in the air purification mode, the airflow flow path in the air conditioning indoor unit is the same as the airflow flow path in the heating mode in fig. 2, except that the heat exchanger 2 is in the non-operating state in the air purification mode to reduce energy consumption and avoid affecting the indoor temperature.

It should be noted that, in the air purification mode, the air flow enters from the second air port 1b below, which is convenient for effectively removing indoor pollutants. Specifically, the contaminants generally settle near the floor surface, and when air is sucked from the second tuyere 1b, the contaminants can be sucked and sterilized more effectively.

Second embodiment

Referring to fig. 5, most of the structure of the second embodiment is the same as that of the first embodiment, except that: in the second embodiment, the air return opening 1d, the first air opening 1a and the second air opening 1b are arranged independently, the air return opening 1d is located on the top side of the shell 1, the heat exchanger 2 is located in the second sub-flow passage 102, and the sterilization module 4, the filter screen 5, the fresh air inlet 1c and the air return opening 1d are located in the first sub-flow passage 101.

The dashed lines and arrows in fig. 5 illustrate the airflow flow path in the air cleaning mode.

Third embodiment

Referring to fig. 6, most of the structure of the third embodiment is the same as that of the first embodiment, except that: the heat exchanger 2 in this third embodiment is V-shaped.

Fourth embodiment

Referring to fig. 7, most of the structure of the fourth embodiment is the same as that of the first embodiment, except that the heat exchanger 2 of the fourth embodiment is disposed at the first tuyere 1 a.

Fifth embodiment

Referring to fig. 8, most of the structure of the fifth embodiment is the same as that of the first embodiment, except that the sterilization module 4 of the fifth embodiment is disposed at the second tuyere 1 b.

Sixth embodiment

Referring to fig. 9, most of the structures in the sixth embodiment are the same as those in the second embodiment, except that the air return opening 1d and the first air opening 1a in the sixth embodiment are combined into one, and the sterilization module 4 is disposed at the first air opening 1 a.

Seventh embodiment

Referring to fig. 10, most of the structure of the seventh embodiment is the same as that of the first embodiment, except that the housing 1 of the first embodiment is arranged substantially along the horizontal wind direction.

The embodiment of the application also provides an air conditioner, which comprises an air conditioner outdoor unit and the air conditioner indoor unit of any one of the embodiments, wherein the air conditioner outdoor unit is connected with the air conditioner indoor unit through a refrigerant pipe.

Specifically, the outdoor unit of the air conditioner includes a compressor for supplying a refrigerant to the heat exchanger 2, and the compressor and the heat exchanger 2 are connected by a refrigerant pipe.

In the embodiment of the casing 1 having the fresh air inlet 1c, when the air flow channel enters air from the fresh air inlet, the operating frequency of the compressor does not exceed 20 hz, i.e. the frequency of the compressor is in a low frequency band, so that the heat exchange efficiency of the heat exchanger 2 can be reduced. Specifically, the amount of wind of following the new trend entry air inlet can be less than the amount of wind when intaking from return air inlet 1d, first wind gap 1a or second wind gap 1b far away, consequently, in this application embodiment, when the amount of wind is less, reduces the operating frequency of compressor for it is comparatively mild to send into indoor new trend temperature, avoids the high temperature or crosses lowly, improves user experience and feels.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An indoor unit of an air conditioner, comprising:

the air conditioner comprises a shell (1), wherein the shell (1) is provided with a first air opening (1a), a second air opening (1b), a return air opening (1d) and an air flow channel (10);

the fan assembly (3) is arranged in the airflow channel (10) to divide the airflow channel (10) into a first sub-flow channel (101) and a second sub-flow channel (102), the first air opening (1a) is communicated with the first sub-flow channel (101), the second air opening (1b) is communicated with the second sub-flow channel (102), and the fan assembly (3) can selectively blow air towards the first sub-flow channel (101) or the second sub-flow channel (102), so that the air-conditioning indoor unit can selectively blow air out from the first air opening (1a) or the second air opening (1 b);

a heat exchanger (2), wherein the heat exchanger (2) is arranged in the first sub-channel (101) and/or the second sub-channel (102);

the air-conditioning indoor unit is provided with an air purification mode, and under the air purification mode, indoor air enters the air flow channel (10) through the air return opening (1d), flows through the sterilization module (4) and is discharged from the first air opening (1a) or the second air opening (1 b).

2. The indoor unit of claim 1, wherein the indoor unit comprises a heating mode and a cooling mode, and in the cooling mode, the indoor unit takes in air from the second air inlet (1b) and takes out air from the first air inlet (1 a); and in the heating mode, the air conditioner indoor unit enters air from the first air opening (1a) and exits air from the second air opening (1 b).

3. The indoor unit of claim 2, wherein the first tuyere (1a) is located at an upper portion of the casing (1), and the second tuyere (1b) is located at a lower portion of the casing (1).

4. The indoor unit of claim 1, wherein the casing (1) has a fresh air inlet (1c) communicating with the air flow path (10), and an air flow from the fresh air inlet (1c) flows through the heat exchanger (2) and is discharged from the first air port (1a) or the second air port (1 b).

5. The indoor unit of claim 4, comprising a first opening/closing door (71), the first opening/closing door (71) being openably/closably provided at the fresh air inlet (1 c); the air-conditioning indoor unit comprises a second switch door (72), the first switch door (71) and the second switch door (72) are located on the same side of the fan assembly (3) along the airflow flowing direction, and the second switch door (72) can be arranged at the corresponding first air opening (1a) or the second air opening (1b) in an opening and closing mode.

6. The indoor unit of air-conditioner according to claim 1, characterized in that the first tuyere (1a), the second tuyere (1b) and the return tuyere (1d) are independent from each other; or one of the first air port (1a) and the second air port (1b) and the return air port (1d) are the same port on the shell (1).

7. The indoor unit of air conditioner according to claim 1, wherein the casing (1) has a fresh air inlet (1c) communicating with the airflow channel (10), the fresh air inlet (1c) and the heat exchanger (2) are located at opposite sides of the fan assembly (3) in the airflow direction, the indoor unit of air conditioner comprises a filter screen (5), and the airflow from the fresh air inlet (1c) sequentially flows through the filter screen (5) and the heat exchanger (2) and does not flow through the sterilization module (4).

8. An air-conditioning indoor unit according to claim 1, wherein in the air-cleaning mode, the fan assembly (3) is in an operating state and the heat exchanger (2) is in a non-operating state.

9. The indoor unit of air conditioner as claimed in claim 1, wherein the sterilization module (4) comprises a dust removal screen (41), a formaldehyde filter screen (42) and a plasma screen (43) arranged in sequence along the airflow direction, and the plasma screen (43) faces the air outlet side of the sterilization module (4).

10. The indoor unit of air conditioner according to any one of claims 1 to 9, wherein the fan assembly (3) is a counter-rotating axial flow fan, and the first sub-flow passage (101) and the second sub-flow passage (102) are located on axially opposite sides of the counter-rotating axial flow fan.

11. The indoor unit of claim 10, wherein the counter-rotating axial flow fan comprises two impellers (31) coaxially arranged, the chord length of the root of each impeller (31) is L1, the axial distance between the two impellers (31) is L2, the ratio of L1 to L2 is 0.4-0.7, and L2 is not less than 5 mm.

12. An air conditioner comprising an outdoor unit and the indoor unit of any one of claims 1 to 11, wherein the outdoor unit and the indoor unit are connected by a refrigerant pipe.

13. An air conditioner comprising an outdoor unit and the indoor unit of claim 7, wherein the outdoor unit comprises a compressor for supplying refrigerant to the heat exchanger, and when the air flow channel is supplied with air from the fresh air inlet, the operating frequency of the compressor is not more than 20 Hz.