CN210688502U - Air conditioner - Google Patents

Abstract

The utility model discloses an air conditioner. The air conditioner includes a housing, a wind wheel, and an evaporator assembly. The casing has the air intake, and the width of air intake is M in the front-back direction, and the wind wheel is located in the casing, and the wind wheel diameter is D. The evaporimeter subassembly encircles in the wind wheel periphery, and the evaporimeter subassembly includes: the rear evaporator, the front upper evaporator and the front lower evaporator are arranged in the front-rear direction, the width of the rear evaporator is L1, the width of the front upper evaporator is L2, the width of the front lower evaporator is L3, and then the ratio of L1/D which is more than or equal to 1.15 to less than or equal to 1.52, the ratio of L2/D which is more than or equal to 1.24 to less than or equal to 1.61 and the ratio of L3/D which is more than or equal to 0.46 to less than or equal to 0.68. According to the utility model discloses an air conditioner, through setting up the rear evaporator that communicates in proper order, preceding upper evaporator and preceding lower evaporator to promote the efficiency of evaporator package, can optimize the inner space of casing again, reduce the probability that other parts take place to interfere in evaporator package and the casing.

Description

Air conditioner

Technical Field

The utility model belongs to the technical field of the air conditioner technique and specifically relates to an air conditioner

Background

With the continuous improvement of the living standard of people, the air conditioner is more and more popularized to common families, and the performance requirement of people on the air conditioner is higher and higher. In the related art, due to the limitation of indoor space, people have higher and higher requirements on the volume of the body of the wall-mounted air conditioner indoor unit, that is, the height of the body of the wall-mounted air conditioner indoor unit is smaller and smaller. However, as the size of the main body is continuously reduced, it is difficult to ensure high energy efficiency of the wall-mounted air conditioning indoor unit.

Disclosure of Invention

The utility model provides an air conditioner, air conditioner has compact structure, the heat transfer is effectual, advantage that the efficiency is high.

According to the utility model discloses air conditioner, air conditioner includes casing, wind wheel and evaporimeter subassembly. The shell is provided with an air inlet, and the width of the air inlet in the front-back direction is M; the wind wheel is arranged in the shell, and the diameter of the wind wheel is D; the evaporator assembly is located in the casing, the evaporator assembly surround in the wind wheel periphery, the evaporator assembly includes: rear evaporator, preceding upper evaporator and preceding lower evaporator that connect gradually and communicate, in the front-back direction, the width of rear evaporator is L1, the width of preceding upper evaporator is L2, the width of preceding lower evaporator is L3, wherein, L1 with D satisfies: 1.15 ≦ L1/D ≦ 1.52, the L2 and the D satisfying: 1.24 ≦ L2/D ≦ 1.61, the L3 and the D satisfying: L3/D is more than or equal to 0.46 and less than or equal to 0.68.

According to the air conditioner provided by the embodiment of the invention, the rear evaporator, the front upper evaporator and the front lower evaporator are sequentially communicated, and the width L1 of the rear evaporator and the diameter D of the wind wheel are more than or equal to 1.15 and less than or equal to L1/D and less than or equal to 1.52, the width L2 of the front upper evaporator and the diameter D of the wind wheel are more than or equal to 1.24 and less than or equal to L2/D and less than or equal to 1.61, and the width L3 of the front lower evaporator and the diameter D of the wind wheel are more than or equal to 0.46 and less than or equal to L3/D and less than or equal to 0.68, so that the evaporator assembly can fully exchange heat with air flow, the energy efficiency of the evaporator assembly is improved, the working efficiency of the air conditioner is improved, the internal space of.

In some embodiments, in the up-down direction, the height of the rear evaporator is H1, the height of the front upper evaporator is H2, and the height of the front lower evaporator is H3, wherein the H1, the H2 and the H3 satisfy: H1/(H2+ H3) is not less than 0.4 and not more than 0.85.

In some embodiments, D satisfies: 118-.

In some embodiments, the width of the evaporator assembly in the front-to-rear direction is L, the L and the M satisfying: M/L is more than or equal to 1.1 and less than or equal to 1.56.

In some embodiments, the angle between the rear evaporator and the front upper evaporator is A and the angle between the front upper evaporator and the front lower evaporator is B, wherein 170 ≦ A + B ≦ 210.

In some embodiments, 1.48 ≦ (A + B)/D ≦ 1.7.

In some embodiments, the heat exchange tube of the rear evaporator has a tube diameter D1, and D1 is less than or equal to 6.35 mm.

In some embodiments, the D1 is 5 mm.

In some embodiments, the evaporator assembly further comprises a front row of evaporators, the front row of evaporators being disposed at the front upper evaporator.

In some embodiments, the heat exchange tubes of the front row of evaporators have a tube diameter of D2, and D2 satisfies: d2 is more than or equal to 6.35 and less than or equal to 8 mm.

In some embodiments, the number of heat exchange tubes of the front row of evaporators is 2 to 4.

In some embodiments, the L2 and the L3 satisfy: L2/L3 is more than or equal to 1.5 and less than or equal to 2.3.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of an air conditioner according to an embodiment of the present invention;

fig. 2 is a partial structural schematic view of an air conditioner according to an embodiment of the present invention;

fig. 3 is a graph illustrating energy efficiency of an air conditioner according to an embodiment of the present invention and a D1 value;

fig. 4 is a graph illustrating energy efficiency of an air conditioner according to an embodiment of the present invention and a D3 value;

fig. 5 is a graph showing energy efficiency of an air conditioner according to an embodiment of the present invention and corresponding graphs of D1 and D3 values.

Reference numerals:

an air conditioner 100;

a housing 110; an air inlet 111;

a wind wheel 120;

an evaporator assembly 130; a rear evaporator 131; a front upper evaporator 132; a front lower evaporator 133; a front row evaporator 134; a rear evaporator 135;

an electronic control box 140.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

An air conditioner 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 5.

As shown in fig. 1-2, according to some embodiments of the present invention, an air conditioner 100 includes a housing 110, a wind wheel 120, and an evaporator assembly 130.

Specifically, as shown in fig. 1, the housing 110 has an air inlet 111, and the width of the air inlet 111 in the front-rear direction (the front-rear direction shown in fig. 1) is M. The wind wheel 120 may be disposed within the housing 110, and the diameter of the wind wheel 120 may be D.

As shown in fig. 1, the evaporator assembly 130 may be disposed in the casing 110, and the evaporator assembly 130 may surround the periphery of the wind wheel, and the evaporator assembly 130 includes: a rear evaporator 131, a front upper evaporator 132 and a front lower evaporator 133 connected and communicated in sequence. It can be understood that, by arranging the evaporator assembly 130 around the periphery of the wind wheel 120, the airflow flowing to the wind wheel 120 can fully flow through the evaporator assembly 130, and the probability of insufficient heat exchange of part of the airflow can be reduced, so that the heat exchange efficiency of the evaporator assembly 130 can be improved, and the energy efficiency of the evaporator assembly 130 can be further improved (here, "energy efficiency" can be understood as the ratio of the heat exchange amount of the evaporator assembly 130 to the airflow to the input power of the evaporator assembly 130).

For example, as shown in fig. 1, the housing 110 may define an installation space, and an air inlet 111 is formed at an upper end surface (an upper end shown in fig. 1) of the housing 110. The evaporator assembly 130 is disposed in the installation space inside the housing 110, the evaporator assembly 130 is located downstream of the air inlet 111 (where "downstream" may refer to the position of the airflow flowing when the airflow flows, that is, the downstream), the wind wheel 120 is disposed downstream of the evaporator assembly 130, and the evaporator assembly 130 is disposed around the periphery of the wind wheel 120. That is, as shown in fig. 1, the rear evaporator 131, the front upper evaporator 132, and the front lower evaporator 133 are distributed along the outer circumference of the wind wheel 120. It should be noted that the wind wheel 120 can drive the external airflow to flow from the air inlet 111 into the casing 110, the airflow flowing into the casing 110 preferentially flows through the evaporator assembly 130 for heat exchange, and then the wind wheel 120 can drive the airflow after heat exchange to blow toward the indoor space.

In addition, as shown in fig. 1, the width of the rear evaporator 131 in the front-rear direction may be L1, the width of the front upper evaporator 132 may be L2, and the width of the front lower evaporator 133 may be L3, wherein L1 and D may satisfy: L1/D is more than or equal to 1.15 and less than or equal to 1.52, and L2 and D can satisfy the following conditions: L2/D is more than or equal to 1.24 and less than or equal to 1.61, and L3 and D can satisfy the following conditions: L3/D is more than or equal to 0.46 and less than or equal to 0.68.

It should be noted that, in order to more accurately show the effect of the value changes of L1/D, L2/D and L3/D on the energy efficiency of the evaporator assembly 130, in the present embodiment, when D is kept constant, a plurality of experiments are performed on the ratio of the width L1 of the rear evaporator 131, the width L2 of the upper front evaporator 132, and the width L3 of the lower front evaporator 133 to the diameter D of the wind wheel 120, and the experimental results are as follows:

from the results of experiments 3.1-3.3, it can be seen that the evaporator assembly 130 has a high energy efficiency when L2/D, L3/D is constant and L1/D is 1.15-1.52. For example, L1/D may be 1.3 or 1.4.

From the results of experiments 3.4-3.6, it can be seen that the evaporator assembly 130 has a high energy efficiency when L1/D, L3/D is constant and L2/D is 1.24-1.61. For example, L2/D may be 1.38 or 1.5.

From the results of experiments 3.7-3.9, it can be seen that the evaporator assembly 130 has a high energy efficiency when L1/D, L2/D is constant and L3/D is 0.46-0.68. For example, L3/D may be 0.53 or 0.61.

It should be noted that the structure and installation space of the air conditioner 100 are considered while improving the energy efficiency of the evaporator assembly 130. It can be understood that the size of the diameter D of the wind wheel 120 may determine the size of the wind wheel 120, and thus, by setting reasonable values of L1/D, L2/D and L3/D, the evaporator assembly 130 may be fully arranged around the outer circumference of the wind wheel 120, and the probability of interference between the evaporator assembly 130 and other components in the housing 110 may be reduced, so as to optimize the inner space of the housing 110.

It should be noted that, the evaluation index of the APF (Annual performance factor) takes into account the refrigeration capacity of the air conditioner and also includes the heating factor, only the energy consumption of the air conditioner in the refrigeration season is examined instead of examining the energy efficiency index of the inverter air conditioner in the past, the APF examines the energy consumption level all the year around, and the evaluation of the performance of the air conditioner is more comprehensive.

According to the air conditioner provided by the embodiment of the invention, the rear evaporator 131, the front upper evaporator 132 and the front lower evaporator 133 which are sequentially communicated are arranged, and the width L1 of the rear evaporator and the diameter D of the wind wheel are 1.15-1/D-1.52, the width L2 of the front upper evaporator and the diameter D of the wind wheel are 1.24-2/D-1.61, and the width L3 of the front lower evaporator and the diameter D of the wind wheel are 0.46-0. 3/D-0.68, so that the evaporator assembly 130 can fully exchange heat with air flow to improve the energy efficiency of the evaporator assembly 130, the working efficiency of the air conditioner 100 is improved, the internal space of the shell 110 can be optimized, and the probability of interference between the evaporator assembly 130 and other components in the shell 110 is reduced.

As shown in fig. 1, according to some embodiments of the present invention, in the up-down direction (the up-down direction shown in fig. 1), the height of the rear evaporator 131 may be H1, the height of the front upper evaporator 132 may be H2, and the height of the front lower evaporator 133 may be H3, so that H1, H2 and H3 may satisfy 0.4 ≦ H1/(H2+ H3) ≦ 0.85. For example, in the present embodiment, by performing a plurality of experiments on the ratio of the height H1 of the rear evaporator 131 to the height of the front upper evaporator 132 and the total height H2+ H3 of the front lower evaporator 133, the experimental results are as follows:

from the results of experiment 2, it can be seen that the evaporator assembly 130 has a higher energy efficiency when 0.4. ltoreq. H1/(H2+ H3). ltoreq.0.85. For example, H1/(H2+ H3) may be 0.55 or 0.7.

As shown in fig. 2, in some embodiments, the diameter D of the rotor 120 satisfies: 118-. For example, D may be 120mm, 122mm, 124mm, 126mm, or 128 mm. Therefore, the diameter of the wind wheel 120 with a reasonable value can be selected according to the size of the shell 110 or the air supply requirement of the air conditioner 100, so that the probability of interference between the wind wheel 120 and other components (such as the electric control box 140) in the shell 110 can be reduced, and the air conditioner 100 has a good air supply effect. In addition, the diameter of the wind wheel 120 with a reasonable value is set, so that the layout of the inner space of the shell 110 can be optimized, and the cost is saved.

According to some embodiments of the present invention, the width of the evaporator assembly 130 in the front-to-rear direction (the front-to-rear direction as shown in FIG. 1) may be L, and L and M may satisfy 1.1. ltoreq. M/L. ltoreq.1.56. For example, in the present embodiment, the ratio of the width M of the air inlet 111 to the width L of the evaporator assembly 130 is tested for several times, and the test results are as follows:

from the results of experiment 1, it can be seen that the evaporator assembly 130 has a higher energy efficiency when M/L is 1.1. ltoreq. M/L.ltoreq.1.56. For example, M/L may be 1.28 or 1.45. From this through setting up the M/L of reasonable numerical value, can make intake and evaporator assembly 130's heat exchange efficiency looks adaptation, both can satisfy the demand of user to air conditioner 100's supply air volume, can make evaporator assembly 130 carry out abundant heat transfer to the air current again, with the efficiency (here "efficiency" can understand as evaporator assembly 130 and accomplish the energy ratio of the energy that air current heat transfer consumed and evaporator assembly 130 actually consumed) of promotion evaporator assembly 130, thereby improve air conditioner 100's work efficiency, promote the air supply effect.

As shown in fig. 2, according to some embodiments of the present invention, the angle between the rear evaporator 131 and the front upper evaporator 132 may be a, and the angle between the front upper evaporator 132 and the front lower evaporator 133 may be B, where 170 ° ≦ a + B ≦ 210 °. For example, a + B may be 180 °, 190 °, or 200 °. It is understood that the evaporator assembly 130 is disposed around the periphery of the wind wheel 120, and as the a + B value varies, the size of the surrounding space defined by the evaporator assembly 130 also varies. From this, through setting up the A + B of reasonable numerical value, both can make evaporimeter subassembly 130 inject the encircleing space that can supply wind wheel 120 to set up, can make evaporimeter subassembly 130 and wind wheel 120 periphery looks adaptation again to the air current that makes flow direction wind wheel 120 can fully exchange heat with evaporimeter subassembly 130, and then improves the efficiency of evaporimeter subassembly 130.

It will be appreciated that the size of the rotor 120 is dependent upon the size of D, and that the size of the enclosure defined by the evaporator assembly 130 is influenced by A + B, and in some embodiments, is 1.48 ≦ (A + B)/D ≦ 1.7.

For example, in the present embodiment, the ratio of the sum of the included angle a and the included angle B to the diameter D of the wind wheel 120 is tested for many times, and the test result is as follows:

from the results of experiment 4, it can be seen that the evaporator assembly 130 has a higher energy efficiency when 1.48 ≦ (A + B)/D ≦ 1.7. For example, M/L may be 1.55 or 1.62. Therefore, when the ratio of (A + B)/D is more than or equal to 1.48 and less than or equal to 1.7, the evaporator assembly 130 can define a surrounding space for the wind wheel 120 to be arranged, and the evaporator assembly 130 can be matched with the periphery of the wind wheel 120, so that the energy efficiency of the evaporator assembly 130 can be improved.

As shown in fig. 2, according to some embodiments of the present invention, the pipe diameter of the heat exchange pipe of the rear evaporator 131 can be D1, and then D1 is less than or equal to 6.35 mm. For example, D1 may be 2mm, 4mm, or 6 mm. It should be noted that the energy efficiency of the evaporator assembly 130 is affected by the value of D1, and the curve thereof is shown in fig. 3. Thus, according to the result shown in fig. 3, the flow rate and heat exchange efficiency of the refrigerant in the heat exchange tube can be controlled by controlling the change of the diameter of the tube, thereby improving the heat exchange capability of the entire rear evaporator 131 and improving the energy efficiency of the evaporator assembly 130. In practical applications, when D1 is 5mm, the heat exchange effect of the post-evaporator 131 is better.

As shown in fig. 1, in accordance with some embodiments of the present invention. The evaporator assembly 130 can also include a front row of evaporators 134, and the front row of evaporators 134 can be disposed in the front upper evaporator 132. Thus, by providing the front-row evaporator 134 on the front-upper evaporator 132, the contact area of the evaporator assembly 130 with the airflow can be increased, the heat exchange capacity of the evaporator assembly 130 can be further improved, and the energy efficiency of the evaporator assembly 130 can be improved.

As shown in FIG. 2, in some embodiments, the heat exchange tubes of the front row evaporator 134 can have a tube diameter D2, such that D2 is 6.35-8 mm. For example, D2 may be 6.5mm, 7.0mm, or 7.5 mm. Therefore, the flow velocity and the heat exchange efficiency of the refrigerant in the heat exchange tube can be controlled by controlling the diameter of the tube, and the heat exchange capacity of the front-row evaporator 134 is improved.

As shown in fig. 2, in some embodiments, the evaporator assembly 130 can further include a back row evaporator 135, and the back row evaporator 135 can be disposed at the back evaporator 131. Thus, by providing the front evaporator 134 in the rear evaporator 131, the contact area between the evaporator unit 130 and the air flow can be further increased, the heat exchange capability of the evaporator unit 130 can be further improved, and the energy efficiency of the evaporator unit 130 can be improved.

Further, the tube diameter of the heat exchange tube of the rear evaporator 135 can be D3, and then D3 is not less than 6.35 and not more than 8mm, it should be noted that the energy efficiency of the evaporator assembly 130 is affected by the value of D3, and the change curve is shown in fig. 4.

In addition, there is an optimal value matching between D3 and D1, so that the heat exchange effect of the evaporator assembly 130 is better. For example, in the present embodiment, the experimental results are shown in fig. 5 by performing a plurality of experiments on the numerical combinations of D1 and D3, and it can be seen from the experimental results shown in fig. 5 that the evaporator assembly 130 has high energy efficiency when D1 is 5mm and D3 is 7 mm.

In some embodiments, the number of heat exchange tubes of the front row evaporator 134 can be 2-4. Therefore, by controlling the number of the heat exchange tubes of the front row evaporator 134, the heat exchange requirement of the front row evaporator 134 can be met, and the cost can be saved.

As shown in fig. 2, according to some embodiments of the present invention, L2 and L3 may satisfy: L2/L3 is more than or equal to 1.5 and less than or equal to 2.3. It should be noted that, in consideration of the distribution of the internal installation space of the casing 110 and the installation position of the wind rotor 120, the width of the front upper evaporator 132 is larger than that of the front lower evaporator 133. For example, L2/L3 may be 1.6, 1.8, 2.0, or 2.2. Therefore, the combination of the front upper evaporator 132 and the front lower evaporator 133 can closely surround the periphery of the wind wheel 120 through the L2/L3 with a reasonable value, the internal space of the air conditioner 100 can be optimized, and the cost is saved.

An air conditioner 100 according to an embodiment of the present invention is described in detail below with reference to fig. 1 to 2. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.

As shown in fig. 1-2, the air conditioner 100 includes a housing 110, a wind wheel 120, and an evaporator assembly 130.

As shown in fig. 1, the housing 110 has an air inlet 111 above the housing 110, the housing 110 may define an installation space, and an evaporator assembly 130 is disposed downstream of the air inlet 111 and a wind wheel 120 is disposed downstream of the evaporator assembly 130 in the installation space defined by the housing 110. As shown in fig. 2, the evaporator assembly 130 includes a rear evaporator 131, a front upper evaporator 132, and a front lower evaporator 133, and the evaporator assembly 130 is annularly provided to the outer circumference of the wind wheel 120. When the air conditioner 100 operates, an external airflow flows toward the evaporator assembly 130 through the air inlet 111, the airflow can exchange heat with the evaporator when flowing through the evaporator assembly 130, and the rear wind wheel 120 can drive the airflow after heat exchange to blow the airflow to an indoor space.

As shown in fig. 1, the diameter of the wind wheel 120 is D, and D satisfies: 118-. The width of the evaporator assembly 130 in the front-rear direction (front-rear direction as shown in FIG. 1) is L, the width of the intake vent 111 in the front-rear direction (front-rear direction as shown in FIG. 1) is M, and when D is kept constant, there is 1.1. ltoreq. M/L. ltoreq.1.56. The height of the rear evaporator 131 is H1, the height of the front upper evaporator 132 is H2, and the height of the front lower evaporator 133 is H3, so that H1/(H2+ H3) is more than or equal to 0.4 and less than or equal to 0.85.

As shown in FIG. 1, the rear evaporator 131 has a width of L1, the front upper evaporator 132 has a width of L2, and the front lower evaporator 133 has a width of L3, wherein L2/L3 is 1.5. ltoreq.2.3.

When D is kept constant, L2/D, L3/D is a constant value, and L1/D is more than or equal to 1.15 and less than or equal to 1.52, the energy efficiency of the evaporator assembly 130 is high;

when D is kept constant, L1/D, L3/D is a constant value, and L2/D is more than or equal to 1.24 and less than or equal to 1.61, the energy efficiency of the evaporator assembly 130 is higher;

when D is kept constant, L1/D, L2/D is constant, and L3/D is greater than or equal to 0.46 and less than or equal to 0.68, the energy efficiency of the evaporator assembly 130 is high.

As shown in FIG. 2, the included angle between the rear evaporator 131 and the front upper evaporator 132 is A, and the included angle between the front upper evaporator 132 and the front lower evaporator 133 is B, so that A + B is greater than or equal to 170 degrees and less than or equal to 210 degrees. The diameter of the wind wheel 120 is D, and the ratio of (A + B)/D is more than or equal to 1.48 and less than or equal to 1.7.

As shown in FIG. 2, the heat exchange tube of the rear evaporator 131 has a tube diameter D1, and D1 is not more than 6.35 mm. The front row evaporator 134 is arranged above the front upper evaporator 132, and the pipe diameter of the heat exchange pipe of the front row evaporator 134 is D2, namely D2 is more than or equal to 6.35 and less than or equal to 8 mm. The rear evaporator 135 is arranged above the rear evaporator 131, and the pipe diameter of the heat exchange pipe of the rear evaporator 135 is D3, namely D3 is more than or equal to 6.35 and less than or equal to 8 mm. As shown in fig. 2, the front row evaporator 134 is provided with 4 connection holes, and 2 heat exchange pipes can be installed in the 4 connection holes.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. An air conditioner, comprising:

the air conditioner comprises a shell, a fan and a controller, wherein the shell is provided with an air inlet, and the width of the air inlet in the front-back direction is M;

the wind wheel is arranged in the shell, and the diameter of the wind wheel is D;

evaporator assembly, evaporator assembly locates in the casing, evaporator assembly surround in the wind wheel periphery, evaporator assembly includes: a rear evaporator, a front upper evaporator and a front lower evaporator which are connected and communicated in sequence,

the rear evaporator has a width of L1, the front upper evaporator has a width of L2, the front lower evaporator has a width of L3,

wherein L1 and D satisfy: 1.15 ≦ L1/D ≦ 1.52, the L2 and the D satisfying: 1.24 ≦ L2/D ≦ 1.61, the L3 and the D satisfying: L3/D is more than or equal to 0.46 and less than or equal to 0.68.

2. The air conditioner as claimed in claim 1, wherein the rear evaporator has a height of H1, the front upper evaporator has a height of H2, and the front lower evaporator has a height of H3 in an up-down direction,

wherein the H1, the H2, and the H3 satisfy: H1/(H2+ H3) is not less than 0.4 and not more than 0.85.

3. The air conditioner according to claim 1, wherein D satisfies: 118-.

4. The air conditioner as claimed in claim 1, wherein the width of the evaporator assembly in the front-rear direction is L, and the L and the M satisfy: M/L is more than or equal to 1.1 and less than or equal to 1.56.

5. The air conditioner of claim 1, wherein the angle between the rear evaporator and the front upper evaporator is A, the angle between the front upper evaporator and the front lower evaporator is B, and wherein A + B is greater than or equal to 170 ° and less than or equal to 210 °.

6. The air conditioner as claimed in claim 5, wherein 1.48 ≦ (A + B)/D ≦ 1.7.

7. The air conditioner as claimed in claim 1, wherein the heat exchange tube of the rear evaporator has a tube diameter of D1, and D1 is ≤ 6.35 mm.

8. The air conditioner of claim 7, wherein said D1 is 5 mm.

9. The air conditioner of claim 1, wherein the evaporator assembly further comprises a front row of evaporators, the front row of evaporators being disposed in the front upper evaporator.

10. The air conditioner as claimed in claim 9, wherein the heat exchange tube of the front row evaporator has a tube diameter D2, and the D2 satisfies: d2 is more than or equal to 6.35 and less than or equal to 8 mm.

11. An air conditioner according to claim 10, wherein the number of heat exchange tubes of said front row of evaporators is 2 to 4.

12. The air conditioner as claimed in claim 1, wherein the L2 and the L3 satisfy: L2/L3 is more than or equal to 1.5 and less than or equal to 2.3.

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