CN218328395U - Indoor unit of air conditioner - Google Patents

Abstract

The utility model discloses an air-conditioning indoor unit, which comprises a fan, a heat exchanger and a water pan, wherein a mounting inner cavity is formed in a shell, and an air inlet and an air outlet are formed on the shell; the fan is positioned in the mounting inner cavity and comprises a fan shell, fan blades formed on the periphery of the fan shell in a dispersing way and a wheel disc positioned at the input end of the fan shell; the heat exchanger is correspondingly arranged on the output side of the fan blades; the water receiving tray is positioned below the heat exchanger, a water receiving groove with an upward opening direction is formed in the water receiving tray, and the water receiving groove is surrounded by a supporting part and a first side wall and a second side wall which are vertically formed on the supporting part; the bottom of the heat exchanger is positioned in the water receiving tank, the first side wall comprises an inner side wall and an outer side wall, and a rectification inclined plane inclined towards the inner side wall is formed above the outer side wall; the rectification inclined plane guides the air current to the air outlet channel, and on the basis of guaranteeing the structural strength of the water pan, the phenomenon of avoiding air current separation is facilitated, the generation of vortex is reduced, the flow loss is avoided, and the air outlet efficiency is obviously improved.

Description

Indoor unit of air conditioner

Technical Field

The utility model belongs to the technical field of the air conditioner, specifically speaking relates to an indoor unit of air conditioner.

Background

Air conditioners are household appliances commonly used in daily life, and are classified into wall-mounted air conditioners and cabinet air conditioners. Among them, the air conditioner generally includes an indoor unit installed at an indoor side and an outdoor unit installed at an outdoor side.

In the indoor unit of the air conditioner, air is axially sucked in through a centrifugal fan blade, radially thrown out, subjected to heat exchange with a refrigerant in a heat exchanger and then blown into a room. Referring to fig. 9 and 10, in the assembly structure of the indoor unit, in order to ensure sufficient water capacity, strength and heat preservation of the water pan, the outer wall of the water pan needs to meet a certain thickness requirement, the outer wall of the water pan with a certain thickness causes the space at the air outlet to be reduced, the airflow forms separation under the action of the outer wall of the water pan, and the separated airflow generates vortex flow in the water pan, which causes flow loss.

Disclosure of Invention

An object of the utility model is to provide an air-conditioning indoor unit to before the air current from heat exchanger output flows through the air outlet in the air-conditioning indoor unit who solves existence among the prior art, can form airflow separation at the nearly wall end of water collector, produce the vortex and cause the flow loss scheduling problem.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

the utility model provides an indoor unit of air conditioner, it includes:

the air conditioner comprises a shell, a fan and a fan, wherein a mounting inner cavity is formed in the shell, and an air inlet and an air outlet are formed in the shell;

the fan is positioned in the installation inner cavity and comprises a fan shell, fan blades dispersedly formed on the periphery of the fan shell and a wheel disc positioned at the input end of the fan shell;

the heat exchanger is positioned in the mounting inner cavity and correspondingly mounted on the output side of the fan blades;

the water receiving tray is positioned below the heat exchanger, a water receiving groove with an upward opening direction is formed in the water receiving tray, and the water receiving groove is surrounded by a supporting part and a first side wall and a second side wall which are vertically formed on the supporting part; the bottom of the heat exchanger is located in the water receiving tank, the first side wall comprises an inner side wall and an outer side wall, and a rectification inclined plane inclined towards the inner side wall is formed above the outer side wall.

In some embodiments of the present application, an air outlet channel is formed between the outer side wall and the side wall of the mounting inner cavity, the air outlet channel is communicated with the air outlet, and a ratio of the wall thickness a of the first side wall to the width c of the air outlet channel is 0.19 to 0.27.

In some embodiments of the present application, a ratio of the wall thickness a of the first sidewall to the width c of the outlet channel is 0.25.

In some embodiments of the present application, the thickness h of the support is not less than 20mm.

In some embodiments of the present application, the inclination angle b of the rectification slope is 40-60 degrees.

In some embodiments of the present application, the angle of inclination b of the fairing slope is 55 degrees.

In some embodiments of the present application, the wheel disc further includes a flow guide member connected in the installation inner cavity and located inside the air inlet, a connection inner cavity with an upward opening is formed in the flow guide member, and the wheel disc portion extends into the connection inner cavity.

In some embodiments of the present application, the flow guide member is connected to the second side wall of the water tray by a fixing plate.

In some embodiments of the present disclosure, two air outlets are formed on the housing, and an air deflector is formed in each air outlet.

In some embodiments of the present application, the heat exchanger is a U-shaped heat exchanger, and the airflow is input from the input end of the fan, passes through the fan blade, the heat exchanger, and after the air outlet channel, is output from two air outlets.

Compared with the prior art, the utility model discloses an advantage is with positive effect:

on the lateral wall of the first lateral wall of water collector, along the flow direction of air current, be formed with the rectification inclined plane of keeping away from the extension of inside wall direction, the rectification inclined plane is favorable to avoiding the phenomenon of air current separation in guiding the air-out passageway with the air current, on the basis of the structural strength who guarantees the water collector, reduces the production of vortex, avoids flow loss, and air-out efficiency obtains obviously promoting.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a cutaway structure of an embodiment of an indoor unit of an air conditioner provided by the present invention;

FIG. 2 is a schematic view of the positions of the housing, the drip pan and the baffle;

FIG. 3 is a schematic view of the external structure of the indoor unit of the air conditioner;

fig. 4 is a sectional plan view of an embodiment of an indoor unit of an air conditioner according to the present invention;

FIG. 5 is a schematic view showing the specific size and position of the flow guide member;

FIG. 6 is a schematic view of a heat exchanger configuration;

fig. 7 is a schematic plan view of an indoor unit of an air conditioner;

FIG. 8 is a schematic view of a specific size position of the defrosting tray;

FIG. 9 is a schematic view of a structure of a water pan and a flow guide member in the background art;

FIG. 10 is a schematic view showing a state of air flow in the related art;

in the figure, the position of the first and second end faces,

100. a housing;

110. an air inlet;

120. an air outlet;

121. an air deflector;

130. an air outlet channel;

200. a fan;

210. a fan housing;

220. a fan blade;

230. a wheel disc;

300. a flow guide member;

301. a fixing plate;

310. the connecting inner cavity;

400. a heat exchanger;

500. a water pan;

501. a water receiving tank;

510. a support portion;

520. a first side wall;

521. a rectification slope;

530. a second side wall.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically coupled, may be directly coupled, or may be indirectly coupled through an intermediary. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present disclosure may repeat reference numerals and/or reference letters in the various examples for purposes of simplicity and clarity and do not in itself dictate a relationship between the various embodiments and/or arrangements discussed.

The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

The low-temperature and low-pressure refrigerant enters the compressor, the compressor compresses the refrigerant gas in a high-temperature and high-pressure state, and the compressed refrigerant gas is discharged. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

As shown in fig. 1 to 8, the present application provides an air conditioning indoor unit, which includes a casing 100 of the air conditioning indoor unit, a fan 200 installed in the casing 100, a heat exchanger 400, a water pan 500, and a deflector 300.

Referring to fig. 3, a mounting cavity is formed in the housing 100, and the fan 200, the heat exchanger 400, the water collector 500 and the deflector 300 are located in the mounting cavity, and an air inlet 110 and an air outlet 120 are formed on the housing 100.

Indoor airflow is input into the housing 100 from the air inlet 110, guided by the fan 200 and then delivered to the heat exchanger 400, and after heat exchange is performed by the heat exchanger 400, air with a proper temperature is output from the air outlet 120.

An air deflector 121 for controlling the air outlet direction is arranged in the air outlet 120, and the air deflector 121 is rotatably installed in the air outlet.

Specifically, the fan 200 is a centrifugal fan 200, and includes a fan housing 210, fan blades 220 dispersedly formed on the outer periphery of the fan housing 210, and a wheel disc 230 located on the fan housing 210, wherein a gap is formed between adjacent fan blades 220 for airflow to pass through.

The fan 200 is externally connected with a driving motor, and under the driving of the driving motor, the fan 200 operates, and airflow is axially sucked by the fan 200, then works through a pressure surface of the fan blade 220, and is radially accelerated and radially thrown out.

The fan housing 210 has an input end, the wheel disc 230 is fixed to the input end of the fan housing 210, and the airflow is input from the air inlet 110 of the outer casing 100, passes through the gap between the fan blades 220, and is then delivered to the heat exchanger 400.

In some embodiments of the present disclosure, in order to improve the air supply effect, two air outlets 120 are correspondingly formed on the housing 100.

Referring to fig. 6, the heat exchanger 400 is correspondingly installed at the output side of the fan blade 220, in order to improve the heat exchange effect and improve the operation stability, the heat exchanger 400 is designed as a U-shaped heat exchanger 400, two heat exchange end surfaces of the U-shaped heat exchanger 400 are respectively located at the inner sides of the two air outlets 120, and the air after heat exchange by the heat exchanger 400 is directly output from the corresponding air outlets 120.

Referring to fig. 1, 2, 4, and 5, in some embodiments of the present application, since the heat exchanger 400 forms condensed water due to temperature difference during operation, in order to prevent the condensed water from condensing inside the casing 100 of the indoor unit of an air conditioner and even dripping indoors, which affects user experience, a water pan 500 for collecting the condensed water is disposed below the heat exchanger 400.

The water pan 500 is fixed in the housing 100, and the water pan 500 is connected to the flow guide 300 through the fixing plate.

A water receiving tank 501 with an upward opening direction is formed in the water receiving tray 500, the lower portion of the heat exchanger 400 is installed in the water receiving tank 501, and the size of the water receiving tank 501 is larger than that of the heat exchanger 400, so that all condensed water dropping from the heat exchanger 400 can be collected.

Specifically, the water receiving tank 501 is surrounded by a support portion 510 and a first sidewall 520 and a second sidewall 530 vertically formed on the support portion 510.

Since the heat exchanger 400 is in the form of a U-shaped heat exchanger 400 and is vertically disposed, most of the air flows through the gaps between the fins of the heat exchanger 400 at a certain angle and wind speed, and then flows through the air outlet 120.

The first sidewall 520 is located outside the water pan 500, and includes an inner sidewall and an outer sidewall, an air outlet channel 130 is formed between the outer sidewall and the sidewall of the installation cavity, and the air outlet channel 130 is communicated with the air outlet 120.

The airflow is output from the air outlet 120 through the air outlet channel 130, and flows into the air outlet channel 130, and under the action of the first sidewall 520, an airflow separation phenomenon is formed, which generates a vortex and causes a flow loss.

In order to reduce the phenomenon of air flow separation, a rectification slope 521 inclined toward the inner side wall is formed above the outer side wall.

That is, along the flowing direction of the airflow, the rectification slope 521 extends along the direction far away from the inner sidewall to guide the airflow into the air outlet channel 130, which is beneficial to avoiding the phenomenon of airflow separation.

The wall thickness of the first sidewall 520 is defined as a, the width of the air outlet channel 130 is defined as c, and experiments prove that the air outlet volume is obviously improved when the ratio of the wall thickness a of the first sidewall 520 to the width c of the air outlet channel 130 is within the range of 0.19 to 0.27.

Within the range of 0.19 to 0.27, the flow rate is increased and then decreased along with the increase of the ratio, and preferably, the ratio of the wall thickness a of the first side wall 520 to the width c of the air outlet channel 130 is 0.25.

In the indoor unit assembling structure, in order to ensure sufficient water capacity, strength and heat preservation of the water pan 500, the wall thickness a of the first side wall 520 needs to be ensured to be at least 10mm, and the thickness h of the supporting part 510 needs to be not less than 20mm.

The inclination angle b of the rectification slope 521 is 40 degrees to 60 degrees, and in the above angle range, along with the increase of the ratio, the corresponding air outlet flow rate also increases first and then decreases.

Preferably, the angle b of inclination of the rectification slope 521 is 55 degrees.

The ratio of the wall thickness a of the first side wall 520 to the width c of the air outlet channel 130 is selected to be 0.25, the range of the inclination angle of the variable rectification inclined plane 521 is selected to be 48-54 degrees, 2 degrees is used as jumping for simulation, and the air outlet lifting percentages are respectively: 1.02%, 1.18%, 1.19%, 1.11%.

That is, when the inclination angle of the rectification slope 521 is 52 degrees, the air volume is increased by about 1.2%, which has a considerable improvement effect.

In addition, after the rectification inclined plane 521 is added, the vortex area in the air outlet channel 130 is obviously reduced, and the air flow organization is smooth, which is also the reason for increasing the air volume.

Referring to fig. 1, 2 and 7, the air guide 300 is located between the intake vent 110 and the wheel disc 230 of the fan 200, is located inside the intake vent 110, and has an annular structure as a whole, a connection cavity 310 with an upward opening is formed in the air guide 300, and a portion below the wheel disc 230 extends into the connection cavity 310.

The end of the conventional flow guide 300 located at the inner side of the wheel disc 230 is bent upward, but the end located at the back side of the wheel disc 230 is of a horizontal structure, the airflow moves with acceleration through the fan 200, and after being axially sucked by the fan 200, the airflow is axially acted through the pressure surface of the fan 200 and radially thrown out with acceleration, and because the heat exchanger 400 has a certain resistance, a part of the airflow is sucked into the fan 200 again through the gap between the wheel disc 230 and the flow guide 300 to form internal circulation, which causes flow loss.

To avoid this problem, the baffle 300 according to the present application is formed with a connecting cavity 310 opened upward, and the disk 230 is partially extended into the connecting cavity 310.

Specifically, the section of the air guide 300 is an arc structure with an upward opening, and an upwardly extending baffle structure is also formed at one end of the air guide located at the back side of the wheel disc 230.

The wheel 230 is gradually expanded along the flowing direction of the airflow, a diversion surface for guiding the airflow to the fan blades 220 is formed on the inner wall of the wheel 230, a horizontal connecting part is formed above the wheel 230, and the fan blades 220 are uniformly dispersed on the horizontal connecting part

Referring to fig. 8, in the indoor unit assembling structure, in order to avoid collision between the wheel disc 230 on the fan 200 and the air guide 300 during high-speed operation, an installation gap H between the upper end surface of the outer side of the air guide 300 and the horizontal connecting portion is between 5 mm and 10mm, and the distance is too large, so that airflow is easily transmitted back to the inner side of the fan 200 from the installation gap, flow loss is formed, and the gap is too small, and the airflow easily collides with the air guide 300 during the movement of the fan 200.

Therefore, it is preferable that the gap H between the outer upper end surface of the baffle 300 and the horizontal connection portion is 6mm.

Generally, the maximum outer diameter D of the fan 200 is 200mm to 450mm in consideration of the actual installation and the size of the indoor unit of the air conditioner.

In order to reduce the flow loss as much as possible on the basis of meeting the installation and operation conditions, researches prove that when the ratio of the radius R of the section arc of the flow guide piece 300 to the maximum outer diameter D of the fan 200 is within the range of 0.06 to 0.10, the airflow output is obviously improved, and preferably, the ratio of the radius R of the section arc of the flow guide piece 300 to the maximum outer diameter D of the fan 200 is selected to be 0.08.

Similarly, in order to meet installation and operation conditions, it is required to ensure that the minimum distance L between the flow guide surface of the wheel disc 230 and the connecting cavity 310 of the flow guide 300 is 6 to 10mm, the minimum distance is too small, so that collision is easy to occur in the operation process, the distance is too large, and vortex is easy to generate, and preferably, the minimum distance L between the flow guide surface of the wheel disc 230 and the connecting cavity 310 of the flow guide 300 is selected to be 7mm.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments of the present invention are only examples, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also intended to be covered by the scope of the present invention.

Claims (10)

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

the air conditioner comprises a shell, a fan and a fan, wherein a mounting inner cavity is formed in the shell, and an air inlet and an air outlet are formed in the shell;

the fan is positioned in the installation inner cavity and comprises a fan shell, fan blades dispersedly formed on the periphery of the fan shell and a wheel disc positioned at the input end of the fan shell;

the heat exchanger is positioned in the installation inner cavity and correspondingly installed on the output side of the fan blades;

the water receiving tray is positioned below the heat exchanger, a water receiving groove with an upward opening direction is formed in the water receiving tray, and the water receiving groove is surrounded by a supporting part and a first side wall and a second side wall which are vertically formed on the supporting part; the heat exchanger bottom is located in the water receiving tank, first lateral wall includes inside wall and lateral wall, the top of lateral wall is formed with to the rectification inclined plane of inside wall direction slope.

2. An indoor unit of an air conditioner according to claim 1,

an air outlet channel is formed between the outer side wall and the side wall of the installation inner cavity, the air outlet channel is communicated with the air outlet, and the ratio of the wall thickness a of the first side wall to the width c of the air outlet channel is 0.19-0.27.

3. An indoor unit of an air conditioner according to claim 2,

the ratio of the wall thickness a of the first side wall to the width c of the air outlet channel is 0.25.

4. An indoor unit of an air conditioner according to claim 1,

the thickness h of the support part is not less than 20mm.

5. An indoor unit of an air conditioner according to claim 1,

the inclination angle b of the rectification inclined plane is 40-60 degrees.

6. An indoor unit of an air conditioner according to claim 5,

the inclination angle b of the rectification inclined plane is 55 degrees.

7. An indoor unit of an air conditioner according to claim 1,

the wheel disc type air conditioner is characterized by further comprising a flow guide piece, wherein the flow guide piece is connected in the installation inner cavity and located on the inner side of the air inlet, a connection inner cavity with an upward opening is formed in the flow guide piece, and the wheel disc part extends into the connection inner cavity.

8. An indoor unit of an air conditioner according to claim 7,

the water guide piece is connected to the second side wall of the water receiving tray through the fixing plate.

9. An indoor unit of an air conditioner according to claim 2,

two air outlets are formed on the shell, and air deflectors are formed in the air outlets.

10. An indoor unit of an air conditioner according to claim 9,

the heat exchanger is a U-shaped heat exchanger, airflow is input from the input end of the fan, passes through the fan blades, the heat exchanger and the air outlet channel and is output from the two air outlets.

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