CN203442973U - air conditioner indoor unit - Google Patents

Abstract

The utility model discloses an air conditioner indoor unit, which includes a shell and an axial flow fan, an evaporator, a motor and a control device contained in the shell, wherein an air inlet and an air outlet are provided on the shell, the front of the axial flow fan faces the air outlet, the back of the evaporator is provided, the axial flow fan is sleeved on the rotating shaft of the motor, and the motor is connected to the control device. The air conditioner indoor unit proposed by the utility model can increase the air supply volume by providing an axial flow fan to replace the cross-flow fan in the prior art. In addition, since the use of the axial flow fan can achieve a larger air volume under the condition of using a lower rotation speed than the cross-flow fan, the noise caused by the rotation of the axial flow fan can be reduced.

Description

air conditioner indoor unit

technical field

The utility model relates to the technical field of household appliances, in particular to an air conditioner indoor unit.

Background technique

The classification of air conditioners is relatively extensive, among which wall-mounted air conditioners with small cooling capacity occupy most of the market. The size of the room determines the cooling capacity of the air conditioner. For example, bedrooms, kitchens, bathrooms, study rooms, and offices all need to use air conditioners with small cooling capacity. Market demand determines the demand for wall-mounted air conditioners with small cooling capacity. . From the user's point of view, the cooling and heating performance of the air conditioner is good or bad, one is the cooling and heating rate, and the other is the air volume. In essence, the two are also related: the size of the air volume directly affects the rate of cooling and heating. The existing wall-mounted air conditioner structure adopts the structure of cross-flow fan and air deflector to supply air. This structure has the following disadvantages: the form of air deflector is used to supply air, the range of air supply is narrow, and there is only one slender air outlet Air supply, the air volume is difficult to break through the existing limit. However, when using a cross-flow fan to discharge air, a higher speed is required to achieve a larger air volume, which will generate greater noise. In addition, the cross-flow fan has a small air outlet range.

Utility model content

The main purpose of the utility model is to provide an air conditioner indoor unit, aiming at improving the air supply volume of the existing air conditioner indoor unit.

In order to achieve the above purpose, the utility model proposes an air conditioner indoor unit, which includes a housing, an axial flow fan, an evaporator, a motor and a control device accommodated in the housing, wherein an air inlet is opened on the housing and an air outlet, the front of the axial flow fan faces the air outlet, and the evaporator is arranged on the back, the axial flow fan is sleeved on the rotating shaft of the motor, and the motor is connected to the control device.

Preferably, the housing includes a middle frame and a base fixedly connected to the back of the middle frame, the air outlet is located on the front of the middle frame, the air inlet is located on the base, and the axial flow fan is housed in In the middle frame, the motor, evaporator and control device are all fixed on the base.

Preferably, air outlet grilles are arranged on the front of the middle frame, and the gaps between the air outlet grilles form the air outlets.

Preferably, the base includes a cylindrical outer frame portion and a fixing portion provided in the middle of the outer frame portion, and the outer frame portion includes a first annular portion and a second annular portion that are opposite and coaxially arranged , and a plurality of spaced support columns connecting the first annular portion and the second annular portion, the gaps between the plurality of support columns form the air inlet, and the evaporator is fixed on the outer The side of the frame portion facing the axial flow fan, the fixing portion is a hollow cylindrical structure opening toward the back side of the middle frame, the control device is accommodated in the fixing portion, and the motor is fixed on One side of the opening is provided on the fixing part.

Preferably, the fixed part is provided with an electric control box cover for placing the control device in the fixed part.

Preferably, the evaporator includes a refrigerant inlet branch pipe and a refrigerant outlet branch pipe arranged oppositely, and the refrigerant inlet branch pipe and the refrigerant outlet branch pipe are respectively provided with a plurality of inlets and a plurality of outlets. It is correspondingly connected with the outlet through an annular coil.

Preferably, the ring-shaped coils are in the shape of a ring and a plurality of ring-shaped coils are coaxially arranged, and the center of the ring-shaped coils is located on the axis of the fixing part.

Preferably, the annular coil is sleeved on the fixing part and located below the electric control box cover.

Preferably, the axis of the rotating shaft of the motor coincides with the axis of the fixing part.

Preferably, the air-conditioning indoor unit further includes an annular filter sheathed on the outer frame.

The indoor unit of the air conditioner proposed by the utility model replaces the cross-flow fan in the prior art by setting the axial flow wind, because the fan blade of the axial flow fan is larger than the fan blade of the cross-flow fan, that is, when the rotating shaft speed of the motor is the same, The air volume of the axial fan is greater than that of the cross-flow fan, therefore, the indoor unit of the air conditioner can increase the air volume. In addition, because the axial flow fan can achieve a larger air volume at a lower speed than the cross-flow fan, the speed of the axial-flow fan can be appropriately reduced to achieve the air volume of the cross-flow fan, which can reduce the The noise caused by the rotation of the axial fan. At the same time, the indoor unit of this air conditioner supplies air through the air outlet and the front of the axial flow fan faces the air outlet. The wind blown by the axial flow fan is directly blown out through the air outlet instead of the existing air guide through the slender air guide strips. Therefore, this The indoor unit of the air conditioner can realize 360-degree air supply, which can achieve the purpose of cooling the room in a short time.

Description of drawings

Fig. 1 is a schematic structural view of a preferred embodiment of an air conditioner indoor unit of the present invention;

Fig. 2 is a schematic diagram of the explosion structure of a preferred embodiment of the air conditioner indoor unit of the present invention;

Fig. 3 is a structural schematic diagram of another viewing angle of the air conditioner indoor unit shown in Fig. 1;

Fig. 4 is a schematic structural view of the middle frame of the air conditioner indoor unit shown in Fig. 2;

Fig. 5 is a schematic structural view of the base of the air conditioner indoor unit shown in Fig. 2;

Fig. 6 is a schematic structural diagram of the motor of the air conditioner indoor unit shown in Fig. 2;

Fig. 7 is a schematic structural diagram of the evaporator of the air conditioner indoor unit shown in Fig. 2;

Fig. 8 is a structural schematic diagram of the filter mesh strips forming the filter mesh in the air conditioner indoor unit of the present invention.

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Referring to Fig. 1 and Fig. 2, Fig. 1 is a schematic structural diagram of a preferred embodiment of an air-conditioning indoor unit of the present invention; Fig. 2 is a schematic diagram of an exploded structure of a preferred embodiment of an air-conditioning indoor unit of the present invention. In Fig. 1, the filter screen part is omitted for a better view of the internal structure of the air conditioner indoor unit.

In this preferred embodiment, the air conditioner indoor unit includes a housing 10 and an axial flow fan 20 housed in the housing 10, an evaporator 30, a motor 40 and a control device (not shown in the figure), wherein the housing 10 An air inlet and an air outlet are provided, the front of the axial flow fan 20 faces the air outlet, and the evaporator 30 is arranged on the back, the axial flow fan 20 is sleeved on the rotating shaft 41 of the motor 40, and the motor 40 is connected with the control device.

The control device is specifically an electric control box. The control device is used to start or stop the motor 40 and control the rotation speed of the rotating shaft 41 of the motor 40 . When the user needs to use the air conditioner indoor unit and turn on the cooling mode, the control device controls the rotation of the rotating shaft 41 of the motor 40 to drive the axial flow fan 20 fixedly connected thereto to rotate after receiving the instruction from the user to turn on the air conditioner indoor unit. In addition, the low-temperature and low-pressure liquid refrigerant is converted into a low-temperature and low-pressure gaseous refrigerant through the heat exchange of the evaporator 30 , and the refrigerant absorbs heat during gasification, thereby reducing the temperature of the evaporator 30 . At this time, the wind enters through the air inlet, and after being cooled by the evaporator 30, the cooled air is blown out through the air outlet by the rotation of the axial flow fan 20. Since the axial flow fan 20 is facing the air outlet, the air conditioner indoor unit Multi-angle air supply can be realized.

The air conditioner indoor unit proposed in this embodiment replaces the cross-flow fan in the prior art by setting the axial flow fan 20, because the fan blade of the axial flow fan 20 is larger than the fan blade of the cross-flow fan, that is, the rotation speed of the rotating shaft 41 of the motor 40 is the same Under the situation of the air conditioner, the air volume of the axial flow fan 20 is greater than that of the cross-flow fan, therefore, the indoor unit of the air conditioner can increase the air supply volume. In addition, because the axial flow fan 20 can achieve a larger air volume at a lower speed than the cross flow fan, the speed of the axial flow fan 20 can be appropriately reduced to achieve the air volume of the cross flow fan, which can reduce the air volume of the cross flow fan. The noise caused by the rotation of the axial flow fan 20 is small. At the same time, the indoor unit of this air conditioner supplies air through the air outlet and the axial flow fan 20 is facing the air outlet. The wind blown by the axial flow fan 20 is directly blown out through the air outlet instead of the existing air guide through the slender air guide strips, so , The indoor unit of this air conditioner can realize 360-degree air supply, which can achieve the purpose of cooling the room in a short time.

Specifically, in this embodiment, the housing 10 includes a middle frame 11 and a base 12 fixedly connected to the back of the middle frame 11, the air outlet is located on the front of the middle frame 11, the air inlet is located on the side wall of the base 12, and the axial flow fan 20 Accommodated in the middle frame 11 , the motor 40 , the evaporator 30 and the control device are all fixed on the base 12 .

The base 12 can be connected with the air-conditioning indoor unit wall hanging board, and the air-conditioning indoor unit hanging wall board is fixed on the wall, thereby realizing that the air-conditioning indoor unit is fixed on the wall.

In the indoor unit of the air conditioner proposed in this embodiment, the evaporator 30 faces the back of the axial flow fan 20, and the axial flow fan 20 is sleeved on the rotating shaft 41 of the motor 40, that is, the cooled wind will blow to the motor 40, thereby affecting the motor 40. Have a cooling effect. However, the motor 40 of the existing air-conditioning indoor unit is installed on the side of the cross-flow fan. Therefore, the motor 40 cannot dissipate heat during long-term operation, thereby affecting the working stability of the air-conditioning indoor unit. The indoor unit of the air conditioner places the motor 40 in the air duct for cooling, so as to cool down the temperature of the motor 40 while cooling, and improve the working stability of the indoor unit of the air conditioner.

Specifically, with reference to FIG. 3 and FIG. 4 , air outlet grilles 111 are provided on the front of the middle frame 11 , and the gaps between the air outlet grilles 111 form air outlets.

By arranging the air outlet grille 111, on the one hand, the axial flow fan 20 can be prevented from being hit by a person due to the fast speed of rotation, and on the other hand, the hollow setting in the direction will not affect the air outlet effect of the indoor unit of the air conditioner.

Specifically, with reference to 5, the base 12 includes a cylindrical outer frame portion 13 and a fixing portion 14 disposed in the middle of the outer frame portion 13, and the outer frame portion 13 includes a first annular portion 131 and a second annular portion 131 that are opposite and coaxially arranged. Two annular parts 132, and a plurality of spaced supporting columns 133 connecting the first annular part 131 and the second annular part 132, the gap between the plurality of supporting columns 133 forms an air inlet, and the evaporator 30 is fixed on the outside The side of the frame part 13 facing the axial flow fan 20, the fixing part 14 is a hollow cylindrical structure opening toward the back side of the middle frame 11, the control device is accommodated in the fixing part 14, and the motor 40 is fixed on the fixing part 14 One side with an opening.

In this embodiment, the support columns 133 are evenly distributed between the first circular portion 131 and the second circular portion 132, so as to improve the uniformity of the air intake of the indoor unit of the air conditioner.

In this embodiment, referring to FIG. 6 , the second circular portion 132 is provided with a plurality of first screw holes 1321 toward the side of the middle frame 11 , and the first screw holes 1321 are used for passing screws to connect the middle frame 11 and the base. 12 fixed connections. In other modified embodiments, the middle frame 11 and the base 12 may also be connected by means of bonding or buckling. In this embodiment, the first circular portion 131 is provided with a plurality of installation holes 1311 for connecting with the wall hanging board of the air conditioner indoor unit. The fixing part 14 has a plurality of second screw holes 141 on the back side of the middle frame 11 for connecting with the screw holes 401 on the motor 40 .

When the air conditioner indoor unit is in the cooling mode, the surface temperature of the evaporator 30 is low, and the water in the air condenses on the surface of the evaporator 30 to generate condensed water. If the condensed water enters the control device, it will affect the function of the control device and fail. The air conditioner indoor unit proposed in this embodiment, by accommodating the control device in the fixed part 14, avoids the failure of the control device function caused by the condensed water entering the control device when the air conditioner indoor unit is in the cooling mode, and further improves The structural stability of the indoor unit of the air conditioner. In addition, the waterproofing of the control device through the fixing part 14 is not only simple and compact in structure, but also easy to install. At the same time, the fixing part 14 will not damage the evaporator 30 . However, in the prior art, in order to prevent the control device from entering the water, it is necessary to add more structural protection control devices in the already narrow space. While increasing the cost, the production and installation are also relatively difficult. Leakage of fluorine, etc. In addition, the air inlet of the indoor unit of the air conditioner is arranged on the rear side of the axial flow fan 20, which can cool down the temperature of the control device and the motor at the same time when the indoor unit of the air conditioner is cooling and heating, and can prolong the service life of the control device and the motor.

In addition, the evaporator 30 is fixed on the side of the outer frame portion 13 facing the axial fan 20, and the air inlet is located on the back of the evaporator 30, that is, the evaporator 30 is fixed between the air inlet and the air outlet, so as to maximize The heat exchange area of the evaporator 30 is greatly improved, so that the heat exchange of the evaporator 30 is uniform.

Further, the fixed part 14 is provided with an electric control box cover 142 for placing the control device in the fixed part 14 .

When the electric control box cover is opened, the control device is placed in the fixed part 14 through the opening of the electric control box cover. After the control device is installed, close the electric control box cover to prevent condensed water from entering the control device through the electric control box cover.

Further, referring to FIG. 7 , the evaporator 30 includes a refrigerant inlet branch pipe 31 and a refrigerant outlet branch pipe 32 which are arranged oppositely. The refrigerant inlet branch pipe 31 and the refrigerant outlet branch pipe 32 are respectively provided with a plurality of inlets 311 and a plurality of outlets. 321 , the corresponding inlet 311 and outlet 321 are correspondingly connected through the annular coil 33 .

In this embodiment, the refrigerant inlet branch pipe 31 and the refrigerant outlet branch pipe 32 are arranged in parallel, and the distance between them is greater than the width of the support column 133 .

Furthermore, the annular coil 33 is circular and a plurality of annular coils 33 are arranged coaxially on a plane, and the center of the annular coil 33 is located on the axis of the fixing part 14 .

Further, the annular coil pipe 33 is sheathed on the fixing portion 14 and located below the electric control box cover.

In this embodiment, the evaporator 30 can be fixed on the base 12 in various ways, for example, it can be sleeved on the annular flange 143 provided on the fixed part 14. At the same time, a support column 133 is located between the refrigerant inlet distribution pipe 31 and Between the refrigerant outlet distribution pipes 32 , the evaporator 30 is supported by the second annular portion 132 . In addition, a plurality of connecting rods (not shown) diverging from the center of the fixing part 14 may be provided between the fixing part 14 and the second annular part 132, and the connecting rods are located below the evaporator 30 to The function of stably supporting the evaporator 30 .

Further, the axis of the rotating shaft 41 of the motor 40 coincides with the axis of the fixing part 14 .

With such a structure, the heat transfer area of the multiple annular coils 33 on the evaporator 30 decreases sequentially from the outside to the inside, and the corresponding heat transfer is smaller in turn, and the axial flow fan 20 is closer to the rotating shaft 41 of the motor 40. The smaller the air volume is, the greater the air volume is in the area farther away from the rotating shaft 41 of the motor 40. Therefore, the evaporator 30 is completely matched with the axial flow fan 20, which can maximize the heat exchange efficiency of the evaporator 30, thereby making the indoor unit of the air conditioner more energy-saving. In the prior art, the evaporator of the indoor unit of the air conditioner has a three-fold structure, which is semi-surrounded by the fan structure. Among them, the middle part has the best heat exchange effect and the largest air volume, the upper one is second, and the lower one has the worst heat exchange effect, with only a little air volume passing through. , This kind of three-fold heat exchanger has uneven heat transfer, and it cannot make all three folds reach the optimal state at the same time, resulting in waste of energy and affecting the improvement of performance.

Further, referring to FIG. 2 and FIG. 8 , the air conditioner indoor unit further includes an annular filter 50 sheathed on the outer frame portion 13 . In this embodiment, the ring-shaped filter 50 is formed by connecting the first and last ends of the square filter bar 51 with a sticky button. One end of the filter bar 51 is provided with a sticky button 511. The sticky button connection has the advantage of easy installation. The filter mesh bar 51 is sleeved on the outer frame part 13, and then the two ends of the filter mesh bar 51 can be glued.

The air-conditioning indoor unit proposed in this embodiment is provided with an annular filter 50 to prevent external impurities from entering the air-conditioning indoor unit through the air inlet, thereby improving the working stability of the air-conditioning indoor unit. At the same time, the structure of the annular filter 50 is simple and the installation is very convenient. In addition, the ring filter 50 is easy to disassemble and wash, just pull down the sticky button 511 to remove the ring filter 50 for cleaning.

The above are only preferred embodiments of the present utility model, and are not therefore limiting the patent scope of the present utility model. All equivalent structural transformations made by using the utility model specification and accompanying drawings are directly or indirectly used in other related technologies. Fields are all included in the scope of patent protection of the utility model in the same way.

Claims (10)

1. An air-conditioning indoor unit, characterized in that it comprises a housing and an axial flow fan, an evaporator, a motor and a control device accommodated in the housing, wherein an air inlet and an air outlet are provided on the housing , the front of the axial flow fan faces the air outlet, the back is provided with the evaporator, the axial flow fan is sleeved on the rotating shaft of the motor, and the motor is connected to the control device. 2. The air conditioner indoor unit according to claim 1, wherein the housing includes a middle frame and a base fixedly connected to the back of the middle frame, the air outlet is located on the front of the middle frame, and the air inlet Located on the side wall of the base, the axial flow fan is accommodated in the middle frame, and the motor, evaporator and control device are all fixed on the base. 3 . The air conditioner indoor unit according to claim 2 , wherein air outlet grilles are arranged on the front of the middle frame, and the gaps between the air outlet grilles form the air outlets. 4 . 4. The air-conditioning indoor unit according to claim 2, wherein the base includes a cylindrical outer frame and a fixing portion arranged in the middle of the outer frame, and the outer frame includes opposite and identical The first annular portion and the second annular portion arranged on the shaft, and a plurality of support columns arranged at intervals connecting the first annular portion and the second annular portion, the gaps between the plurality of support columns form The air inlet, the evaporator is fixed on the side of the outer frame facing the axial fan, the fixing part is a hollow cylindrical structure opening toward the back side of the middle frame, the control The device is accommodated in the fixing part, and the motor is fixed on the side of the fixing part provided with an opening. 5 . The air conditioner indoor unit according to claim 4 , wherein an electric control box cover for placing the control device in the fixing part is opened on the fixing part. 6 . 6. The air-conditioning indoor unit according to claim 5, wherein the evaporator includes a refrigerant inlet branch pipe and a refrigerant outlet branch pipe arranged oppositely, and the refrigerant inlet branch pipe and the refrigerant outlet branch pipe respectively Correspondingly, a plurality of inlets and a plurality of outlets are provided, and the inlets and the outlets are correspondingly connected through annular coil pipes. 7. The air-conditioning indoor unit according to claim 6, wherein the annular coil is in the shape of a ring and a plurality of the annular coils are arranged coaxially, and the center of the annular coil is located at the on the axis of the fixed part. 8 . The air conditioner indoor unit according to claim 7 , wherein the annular coil is sheathed on the fixing part and is located below the electric control box cover. 9. The air conditioner indoor unit according to claim 7, wherein the axis of the rotating shaft of the motor coincides with the axis of the fixing part. 10. The air-conditioning indoor unit according to any one of claims 4 to 9, further comprising an annular filter sheathed on the outer frame.

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