CN112303711B

CN112303711B - Wall-mounted air conditioner indoor unit

Info

Publication number: CN112303711B
Application number: CN201910696694.XA
Authority: CN
Inventors: 赵夫峰
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: 2019-07-30
Filing date: 2019-07-30
Publication date: 2022-02-25
Anticipated expiration: 2039-07-30
Also published as: WO2021017207A1; CN112303711A

Abstract

The invention discloses a wall-mounted air conditioner indoor unit, which comprises: the device comprises a shell, a heat exchange assembly, an air duct assembly, a cross-flow wind wheel and a water receiving assembly. The top of the shell is provided with an air inlet, and the bottom of the shell is provided with an air outlet; the heat exchange assembly comprises a rear heat exchanger arranged below the air inlet, and the rear heat exchanger is inclined from top to bottom and extends backwards; the air duct assembly comprises a front air duct piece and a rear air duct piece arranged behind the front air duct piece, an air outlet duct is defined between the rear air duct piece and the front air duct piece, and the air outlet duct extends from the heat exchange assembly to the air outlet; the cross flow wind wheel is transversely arranged at the inlet of the air outlet duct, and the upper end part of the rear duct piece extends into the space between the cross flow wind wheel and the rear heat exchanger; the water receiving assembly defines a rear water receiving tank which is arranged below the rear heat exchanger and behind the rear air duct piece, wherein Y1/D is more than or equal to 1.3 and less than or equal to 2.6, Y1/Y2 is more than or equal to 1.1 and less than or equal to 1.35, L/M is more than or equal to 0.06 and less than or equal to 0.17, and H/L1 is more than or equal to 0.48 and less than or equal to 0.8. The wall-mounted air conditioner indoor unit has higher energy efficiency level.

Description

Wall-mounted air conditioner indoor unit

Technical Field

The invention relates to the technical field of air conditioners, in particular to a wall-mounted air conditioner indoor unit.

Background

Some air conditioners in the related art are affected by the use environment, so that the overall dimension of the wall-mounted air conditioner indoor unit cannot be too large, the internal space of the wall-mounted air conditioner indoor unit is limited and smaller, and the energy efficiency level of the wall-mounted air conditioner indoor unit can be affected to a certain extent.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a wall-mounted air conditioner indoor unit which has a high energy efficiency level.

A wall-mounted type air conditioning indoor unit according to a first aspect of the present invention includes: the air conditioner comprises a shell, a fan and a controller, wherein the top of the shell is provided with an air inlet, and the bottom of the shell is provided with an air outlet; the heat exchange assembly is arranged in the shell and comprises a rear heat exchanger arranged below the air inlet, and the rear heat exchanger inclines and extends from top to bottom along a first direction; the air duct assembly is arranged in the shell and comprises a front air duct piece and a rear air duct piece arranged behind the front air duct piece, an air outlet duct is defined between the rear air duct piece and the front air duct piece, and the air outlet duct extends to the air outlet from the heat exchange assembly; the cross-flow wind wheel is transversely arranged at the inlet of the air outlet duct, the upper end part of the rear air duct piece extends into the space between the cross-flow wind wheel and the rear heat exchanger, and the diameter of the cross-flow wind wheel is D; the water receiving assembly is arranged in the shell, a rear water receiving groove is limited by the water receiving assembly, the rear water receiving groove is arranged below the rear heat exchanger and behind the rear air duct piece, on a preset cross section of the wall-mounted air conditioner indoor unit, the lowest point in the rear water receiving groove is used as a horizontal line, the linear distance between the intersection point of the horizontal line and the rear air duct piece and the upper end point of the rear air duct piece is Y1, a projection point is obtained by performing orthographic projection on the leeward side of the rear heat exchanger through the upper end point of the rear air duct piece, the linear distance between the projection point and the lower end point of the leeward side of the rear heat exchanger is Y2, the horizontal length of the air inlet in the front-back direction is M, the horizontal distance between the rear end point of the rear heat exchanger and the rear end face of the shell is L, and the vertical height of the rear heat exchanger is H, the length of the rear heat exchanger in the first direction is L1, wherein Y1/D is more than or equal to 1.3 and less than or equal to 2.6, Y1/Y2 is more than or equal to 1.1 and less than or equal to 1.35, L/M is more than or equal to 0.06 and less than or equal to 0.17, and H/L1 is more than or equal to 0.48 and less than or equal to 0.8.

According to the wall-mounted air conditioner indoor unit, the wall-mounted air conditioner indoor unit is provided with the following components: Y1/D is more than or equal to 1.3 and less than or equal to 2.6, Y1/Y2 is more than or equal to 1.35, and L// M is more than or equal to 0.06 and less than or equal to 0.17, so that the wall-mounted air-conditioning indoor unit can have higher energy efficiency grade.

In some embodiments, 118mm ≦ D ≦ 130 mm.

In some embodiments, the heat exchange assembly further comprises: a back heat exchanger provided at the windward side of the back heat exchanger, the back heat exchanger also extending backwards from top to bottom along the first direction, the back heat exchanger having a length in the first direction of L3, wherein L3 < L1.

In some embodiments, 1.2 ≦ L3/L1 ≦ 2.15.

In some embodiments, the rear heat exchanger comprises a plurality of rows of rear heat exchange tube sets arranged at intervals in a second direction perpendicular to the first direction, each row of rear heat exchange tube sets comprises a plurality of rear heat exchange tubes arranged at intervals in the first direction, the back heat exchanger comprises a row of back heat exchange tube sets comprising a plurality of back heat exchange tubes arranged at intervals in the first direction, the number of rows of the back heat exchange tube sets is N1, the diameter of the rear heat exchange tubes is D1, the diameter of the back heat exchange tubes is D2, wherein N1 is greater than or equal to 3, wherein D1 is greater than or equal to 4.7mm and less than or equal to 6.35mm, and D2 is greater than or equal to 6.35mm and less than or equal to 8 mm.

In some embodiments, the number of back heat exchange tubes is N2, wherein N2 is 4 or 6 or 8.

In some embodiments, the water receiving assembly includes a rear water receiving pan defining the rear water receiving trough, the rear water receiving pan and the rear air duct member being separate pieces.

In some embodiments, the wall-mounted air conditioner indoor unit further comprises an electric control device arranged in front of the heat exchange assembly, the heat exchange assembly further comprises a front heat exchanger, a lower heat exchanger and a front back heat exchanger, the front heat exchanger is arranged below the air outlet and is positioned in front of the rear heat exchanger, the front heat exchanger is inclined forwards and extends forwards from top to bottom along a third direction, the upper end of the front heat exchanger is connected with the upper end of the rear heat exchanger, the lower end of the front heat exchanger is far away from the lower end of the rear heat exchanger, the lower heat exchanger is positioned below the front heat exchanger and is positioned in front of the cross-flow wind wheel, the front heat exchanger is inclined backwards and extends upwards and downwards, the upper end of the lower heat exchanger is connected with the lower end of the front heat exchanger, the front back heat exchanger is arranged on the windward side of the front heat exchanger, and the front back heat exchanger is also inclined forwards and extends downwards from top to bottom along the third direction, the length of the front back heat exchanger in the third direction is L4, and the length of the front heat exchanger in the third direction is L2, wherein L4 < L2.

In some embodiments, the length of the shell is A, the height of the shell is B, and the thickness of the shell is C, wherein A is less than or equal to 800mm, B is less than or equal to 298mm, and 375mm is less than or equal to C is less than or equal to 400 mm.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a preset cross-sectional view of a wall-mounted air conditioning indoor unit according to an embodiment of the present invention;

FIG. 2 is a schematic view of the heat exchange assembly shown in FIG. 1;

FIG. 3 is graphical data for a sixth set of experiments in accordance with the present invention;

FIG. 4 is graphical data for a seventh set of experiments in accordance with the present invention;

FIG. 5 is graphical data for an eighth set of experiments in accordance with the present invention.

Reference numerals:

wall-mounted air conditioning indoor unit 100:

a housing 1;

an air inlet 11; an air outlet 12;

a heat exchange component 2;

a rear heat exchanger 21; a rear heat exchange tube group 211; a rear heat exchange tube 2110;

a back heat exchanger 22; a back heat exchange tube group 221; a back heat exchange tube 2210;

a front heat exchanger 23; a front-back heat exchanger 24; a lower heat exchanger 25;

an air duct assembly 3;

a rear air duct member 31; a front air duct member 32; an air outlet duct 33;

a cross flow wind wheel 4;

a water receiving component 5; a rear water pan 5 a; a rear water receiving tank 51;

an electronic control box 6.

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 drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. 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 invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.

Hereinafter, a wall-mounted type air conditioning indoor unit 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1, a wall-mounted type air conditioning indoor unit 100 according to an embodiment of the present invention may include: the device comprises a shell 1, a heat exchange assembly 2, an air duct assembly 3, a cross-flow wind wheel 4 and a water receiving assembly 5. The top of the shell 1 is provided with an air inlet 11, the bottom of the shell 1 is provided with an air outlet 12, the heat exchange assembly 2 is arranged in the shell 1 and comprises a rear heat exchanger 21 arranged below the air inlet 11, and the rear heat exchanger 21 is inclined from top to bottom and extends backwards along a first direction F1.

It should be noted that the wall-mounted air conditioning indoor unit 100 is generally mounted on an indoor wall, and is horizontally oriented rearward toward the wall and forward away from the wall, and vertically oriented upward toward the top of the casing 1 and downward toward the bottom of the casing 1.

As shown in fig. 1, the air duct assembly 3 is disposed in the casing 1, and includes a front air duct member 32 and a rear air duct member 31 disposed behind the front air duct member 32, an air outlet duct 33 is defined between the rear air duct member 31 and the front air duct member 32, the air outlet duct 33 extends from the heat exchanging assembly 2 to the air outlet 12, the cross-flow wind wheel 4 is transversely disposed at an inlet of the air outlet duct 33, and an upper end portion of the rear air duct member 31 extends between the cross-flow wind wheel 4 and the rear heat exchanger 21, the water receiving assembly 5 is disposed in the casing 1 and defines a rear water receiving groove 51, and the rear water receiving groove 51 is disposed below the rear heat exchanger 21 and behind the rear air duct member 31.

As shown in fig. 1, a heat exchange assembly 2, an air duct assembly 3, a cross-flow wind wheel 4 and a water receiving assembly 5 in a wall-mounted air conditioner indoor unit 100 are all arranged in a casing 1, an air inlet 11 is arranged at the top of the casing 1, an air outlet 12 is arranged at the bottom of the casing 1, the heat exchange assembly 2 can include a rear heat exchanger 21, the rear heat exchanger 21 is arranged below the air inlet 11 and extends backwards in an inclined manner from top to bottom along a first direction F1, the air duct assembly 3 includes a front air duct piece 32 and a rear air duct piece 31, an air outlet duct 33 is defined between the front air duct piece 32 and the rear air duct piece 31, the air outlet duct 33 extends to the air outlet 12 from the heat exchange assembly 2, the axis of the cross-flow wind wheel 4 extends in a transverse direction and is located at an inlet position of the air outlet duct 33, and the upper end of the rear air duct piece 31 extends into a position between the cross-flow wind wheel 4 and the rear heat exchanger 21.

When the wall-mounted air conditioner indoor unit 100 works, the cross-flow wind wheel 4 rotates to enable the air inlet 11 to generate negative pressure, indoor air is sucked into the shell 1, the air entering the shell 1 can exchange heat with the heat exchange assembly 2, then enters the air outlet duct 33, and finally is sent out to the indoor from the air outlet 12, so that the indoor temperature can be adjusted (such as refrigeration and heating). In addition, in the process of refrigerating the wall-mounted air conditioner indoor unit 100, because the surface temperature of the heat exchange assembly 2 is lower than that of the indoor air at this time, the water in the indoor air can form condensed water at the heat exchange assembly 2, and therefore, the water receiving assembly 5 is further arranged and used for collecting the condensed water dripping from the heat exchange assembly 2, wherein the water receiving assembly 5 can comprise a rear water receiving groove 51, and the rear water receiving groove 51 is arranged below the rear heat exchanger 21 and behind the rear air duct piece 31 so as to collect the condensed water dripping from the rear heat exchanger 21.

As shown in fig. 1, the diameter of the cross-flow wind wheel 4 is D, on a preset cross section of the wall-mounted air conditioner indoor unit 100, the lowest point in the rear water receiving tank 51 is taken as a horizontal line, the linear distance between the intersection point of the horizontal line and the rear air duct member 31 and the upper end point of the rear air duct member 31 is Y1, the upper end point of the rear air duct member 31 makes a forward projection to the leeward side of the rear heat exchanger 21 to obtain a projection point, the linear distance between the projection point and the lower end point of the leeward side of the rear heat exchanger 21 is Y2, the horizontal length of the air inlet 11 in the front-rear direction is M, the horizontal distance between the rear end point of the rear heat exchanger 21 and the rear end surface of the casing 1 (i.e. the vertical surface passing the rearmost end point on the casing 1) is L1, the vertical height of the rear heat exchanger 21 is H, the length of the rear heat exchanger 21 in the first direction F1 is L1, wherein Y1/D is 1.3 is 2.6 or more, Y1/Y2 is 1.35 or more, 0.06L/M17/17 is 0.17/0.1 or more, H/L1 is more than or equal to 0.48 and less than or equal to 0.8.

The predetermined cross section of the wall-mounted air conditioning indoor unit 100 in the present application includes, but is not limited to, a cross section perpendicular to the longitudinal direction of the wall-mounted air conditioning indoor unit 100 at a position right in the middle of the longitudinal direction of the wall-mounted air conditioning indoor unit 100. In addition, the cross flow wind wheel 4 is horizontally arranged, that is, the axial extension direction of the cross flow wind wheel 4 is parallel to the length direction of the wall-mounted air conditioner indoor unit 100, or the axial of the cross flow wind wheel 4 is perpendicular to the preset cross section of the wall-mounted air conditioner indoor unit 100. In addition, for the heat exchange assembly 2, a surface (i.e., an upstream surface) of one side, which is located near the air inlet 11 and is preferentially contacted with the air entering the housing 1, is a windward surface of the heat exchange assembly 2, whereas a surface (i.e., a downstream surface) of the other side of the heat exchange assembly 2 is a leeward surface of the heat exchange assembly 2.

After analyzing various factors which may cause the energy efficiency influence of the wall-mounted air-conditioning indoor unit 100, the inventor creatively finds that when the value ranges of Y1/D, Y1/Y2 and L// M, H/L1 are the same, the wall-mounted air-conditioning indoor unit 100 in the embodiment of the invention can be ensured to have higher energy efficiency.

The inventors subsequently arrived at the following experiments (see the first to fifth experiments below for details): 1.3. ltoreq. Y1/D. ltoreq.2.6, and may be, for example: 1.3, 1.4, 1.63, 1.95, 2.26, 2.6, etc., 1.1. ltoreq. Y1/Y2. ltoreq.1.35, and may be, for example: 1.1, 1.16, 1.21, 1.28, 1.35, etc., 0.06 ≦ L// M ≦ 0.17, and may be, for example: 0.06, 0.09, 0.11, 0.14, 0.17, etc., 0.48. ltoreq.H/L1. ltoreq.0.8, and may be, for example, 0.48, 0.55, 0.64, 0.72, 0.8, etc.

It should be noted that the evaluation indexes adopted in the test exemplified herein are all APFs, specifically, the APFs (abbreviation of Annual performance factor, Annual energy consumption efficiency) evaluation indexes not only consider the refrigeration capacity of the air conditioner, but also include heating factors, so that the conventional method for evaluating the energy efficiency index of the inverter air conditioner only evaluates the energy consumption of the air conditioner in the refrigeration season, and the APFs evaluate the energy consumption level throughout the year, so that the evaluation on the air conditioner performance is more comprehensive.

The specific experimental results are shown below:

the first set of experiments: in the experimental conditions that the length of Y1 was constant, or Y1 was constant, the diameter D was adjusted to obtain the range of energy efficiency APF at different ratios of Y1/D, and the following data were obtained:

table one:

therefore, the ratio of the length Y1 to the diameter D is set to 1.3 or more and Y1/D or less and 2.6 or less by adjusting the diameter D or the size of the length Y1, so that the wall-mounted air conditioning indoor unit 100 can have high energy efficiency.

The second set of experiments: the experimental conditions were that the diameter D was fixed and the length L was adjusted, or the length L was fixed and the length M was adjusted to obtain the range of energy efficiency APF at different ratios of L/M, yielding the following data:

table two:

therefore, the ratio of the length L to the length M is set to 0.06 ≤ L// M ≤ 0.17 by adjusting the length L or the length M, so that the wall-mounted air conditioning indoor unit 100 can have high energy efficiency.

The third set of experiments: the experimental conditions are that the diameter D of the wind wheel is kept unchanged, the ratio of H to L1 is unchanged, and the ratio of L to M is unchanged. Adjusting the size of Y2, or adjusting the size of Y1 to obtain the range of energy efficiency APFs at different ratios of Y1 to Y2, yields the following data:

table three:

therefore, the ratio of Y1 to Y2 is 1.1-Y1/Y2-Y3535 by adjusting the size of Y2 or adjusting the size of Y1, so that the wall-mounted air-conditioning indoor unit 100 can have high energy efficiency.

Fourth set of experiments: experimental conditions were carried out to adjust the height H with the diameter D constant, or to adjust the length L with the height H constant, to obtain a range of energy efficiency APF at different ratios of H/L1, yielding the following data:

watch four

Therefore, the ratio of the height H to the length L is set to 0.48 or more and H/L1 or less and 0.8 or less by adjusting the height H or the length L, so that the wall-mounted air conditioning indoor unit 100 can have high energy efficiency.

The wall-mounted air conditioning indoor unit 100 according to the present invention is configured by: Y1/D is more than or equal to 1.3 and less than or equal to 2.6, Y1/Y2 is more than or equal to 1.35, and L// M is more than or equal to 0.06 and less than or equal to 0.17, so that the wall-mounted air-conditioning indoor unit 100 can have higher energy efficiency.

In some embodiments, as shown in FIG. 1, the diameter D of the cross-flow wind wheel 4 is 118mm ≦ D ≦ 130 mm. That is to say, the diameter D of the cross-flow wind wheel 4 ranges from 118mm to 130mm, for example, 118mm, 125mm, 130mm, and the like, so that the cross-flow wind wheel 4 can provide sufficient air supply power for the wall-mounted air-conditioning indoor unit 100, and further, the wall-mounted air-conditioning indoor unit 100 can have high energy efficiency.

In some embodiments, as shown in fig. 1 and 2, the heat exchange assembly 2 may further include: a back heat exchanger 22, the back heat exchanger 22 being arranged on the windward side of the back heat exchanger 21, the back heat exchanger 22 also extending backwards from top to bottom in a first direction F1, the back heat exchanger 22 having a length L3 in the first direction F1 and the back heat exchanger 21 having a length L1 in the first direction F1, wherein L3 < L1. That is, the back heat exchanger 22 is provided on the side of the back heat exchanger 21 close to the air outlet 12, and the back heat exchanger 21 and the back heat exchanger 22 are inclined in the same direction and at the same angle in the first direction F1, the length of the back heat exchanger 22 and the length of the back heat exchanger 21 are L3 and L1, respectively, in the first direction F1, and the length of the back heat exchanger 22 is smaller than the length of the back heat exchanger 21, i.e., L3 < L1. Therefore, the air entering the casing 1 can exchange heat with the back heat exchanger 22 and the back heat exchanger 21 respectively, so that the heat exchange efficiency of the heat exchange assembly 2 can be improved, and the wall-mounted air conditioner indoor unit 100 can have high energy efficiency.

In some embodiments, as shown in FIG. 2, 1.2 ≦ L3/L1 ≦ 2.15. That is, the ratio of the length L3 to the length L1 is 1.2 to 2.15 (e.g., 1.2, 1.42, 1.65, 1.86, 2.15, etc.), and can be verified by the following experiment, for example.

Fifth set of experiments: experimental conditions were such that the diameter D was kept constant, the length L was constant with the length M, the length Y2 was constant with the length Y1, the length L1 was adjusted, or the length L3 was adjusted to obtain the range of energy efficiency APF at different ratios of L1 to L3, and the following data were obtained:

watch five

Therefore, by adjusting the length L1 or the length L3, the ratio of the length L1 to the length L3 is in the range of 1.2 to L3/L1 to 2.15, so that the wall-mounted air conditioning indoor unit 100 can have high energy efficiency.

In some embodiments, as shown in FIG. 1, the rear heat exchanger 21 may comprise a plurality of rows of rear heat exchange tube sets 211, the plurality of rows of rear heat exchange tube sets 211 are arranged at intervals along a second direction F2 perpendicular to the first direction F1, each row of rear heat exchange tube sets 211 comprises a plurality of rear heat exchange tubes 2110 arranged at intervals along the first direction F1, the rear heat exchanger 22 comprises a row of rear heat exchange tube sets 221, the rear heat exchange tube sets 221 comprises a plurality of rear heat exchange tubes 2210 arranged at intervals along the first direction F1, the number of rows of the rear heat exchange tube sets 211 is N1, the diameter of the rear heat exchange tubes 2110 is D1, and the diameter of the rear heat exchange tubes 2210 is D2, wherein N1 is D1-6.35 mm, and D2-8 mm, wherein 4.7mm is D1.

That is, the rear heat exchanger 21 may include a plurality of rows of rear heat exchange tube groups 211 spaced apart along the second direction F2, each row of rear heat exchange tube groups 211 including a plurality of rear heat exchange tubes 2110 spaced apart along the first direction F1, wherein the number of rows of the rear heat exchange tube groups 211 is N1, the diameter of each rear heat exchange tube 2110 is D1, the first direction F1 is perpendicular to the second direction F2, and the rear heat exchanger 22 includes a plurality of rear heat exchange tubes 2210 spaced apart along the first direction F1, wherein the diameter of each rear heat exchange tube 2210 is D2. In addition, as shown in fig. 2, in order to ensure that the wall-mounted air conditioning indoor unit 100 can have high energy efficiency, the row number N1 ≧ 3, such as 3, 4, 5, and so on, is set to 4.7mm ≦ D1 ≦ 6.35mm, such as 4.75mm, 5.5mm, 6mm, and 6.35mm, and the row number D2 ≦ 8mm, such as 6.35mm, 6mm, 6.5mm, 7mm, 7.5mm, and 8mm, may be set, and may be verified by the following experiment, for example.

The sixth set of experiments: the experimental conditions were such that the range of the energy efficiency APF was obtained by adjusting the size of D1 described above, and the data of the graph shown in fig. 3 was obtained.

The seventh set of experiments: the experimental conditions were such that the range of the energy efficiency APF was obtained by adjusting the size of D2 described above, and the data of the graph shown in fig. 4 was obtained.

In fig. 3, the abscissa is the pipe diameter D1, the ordinate is the energy efficiency APF value, and the change curve of the energy efficiency at different D1 is obtained by adjusting the size of the pipe diameter D1, as can be obtained from fig. 3, when the pipe diameter D1 is 4.7mm or more and D1 or less and 6.35mm or less, the wall-mounted air conditioning indoor unit 100 can have higher energy efficiency.

In fig. 4, the abscissa is the pipe diameter D2, the ordinate is the energy efficiency APF value, and the size of the pipe diameter D2 is adjusted to obtain a change curve of energy efficiency at different D2, and as can be seen from fig. 4, when the pipe diameter D1 is 6.35mm or more and D1 or less and 8mm or less, the wall-mounted air conditioning indoor unit 100 can have high energy efficiency.

It will be appreciated that while ensuring a high energy efficiency of the rear heat exchanger 21, the rear heat exchange tubes 2110 can be of relatively low cost, and for this reason, of the tube diameters D1 of the rear heat exchange tubes 2110, the tube diameters can be selected to be the smallest integer value within a closer range, for example, D1-5 mm, and of the tube diameters D2 of the rear heat exchange tubes 2210, the tube diameters can be selected to be the smallest integer value within a closer range, for example, D2-7 mm.

In the eighth set of experiments, the range of energy efficiency APF was obtained by adjusting D1 and D2, and the data of the graph shown in fig. 5 was obtained.

In fig. 5, the abscissa indicates the energy efficiency APF value when the values of D1 and D2 are adjusted to be within different ranges, and it can be seen from the graph that the energy efficiency APF value is relatively highest when the values of D2 and D1 are D1-5 mm and D2-7 mm, respectively.

By integrating the chart data in the three experiments, it can be found that when the value of D1 is 4.7-6.35 mm of D1, and the value of D2 is 6.35-8 mm of D2, the wall-mounted air conditioner indoor unit 100 can have higher energy efficiency. Furthermore, when the D2 is relatively large, the pressure in the back heat exchange tubes 2210 can be reduced, thereby improving the safety of the heat exchange module 2.

In some embodiments, as shown in fig. 1, the number of back heat exchange tubes 2210 is N2, where N2 may be 4 or 6 or 8. It should be noted that since most of the heat exchange tubes used in the heat exchange module 2 are U-shaped tubes, the design of the rear heat exchange tubes 2110 can be optimized when the number N2 of the back heat exchange tubes 2210 is set to an even number of 4, 6 or 8.

In some embodiments, as shown in fig. 1, the water receiving assembly 5 may include a rear water receiving tray 5a, the rear water receiving tray 5a defines a rear water receiving tank 51, the rear water receiving tray 5a and the rear air duct assembly 3 are separate pieces, that is, the rear water receiving tray 5a and the rear air duct assembly 3 may not be an integral piece, so that the rear water receiving tray 5a and the rear air duct assembly 3 may be processed separately, and thus the structure of the water receiving tray and the rear air duct assembly 3 may be simpler, the production may be facilitated, and the length of the Y1 may be ensured to meet the requirement. Of course, the present invention is not limited thereto, and the rear water pan 5a and the rear air duct assembly 3 may be integrally formed, thereby increasing the structural stability.

In some embodiments, as shown in fig. 1 and 2, the wall-mounted air conditioning indoor unit 100 further includes an electric control device 6 disposed in front of the heat exchange assembly 2, the heat exchange assembly 2 further includes a front heat exchanger 23, a lower heat exchanger 25, and a front back heat exchanger 24, the front heat exchanger 23 is disposed below the air outlet 12 and in front of the rear heat exchanger 21, the front heat exchanger 23 extends forward from top to bottom in a third direction F3 (shown in fig. 1 as F3), an upper end of the front heat exchanger 23 is connected to an upper end of the rear heat exchanger 21, a lower end of the front heat exchanger 23 is far away from a lower end of the rear heat exchanger 21, the lower heat exchanger 25 is disposed below the front cross-flow wind wheel 4, the front heat exchanger 23 extends backward from top to bottom, an upper end of the lower heat exchanger 25 is connected to a lower end of the front heat exchanger 23, the front back heat exchanger 24 is disposed on a windward side of the front heat exchanger 23, the front back heat exchanger 24 also extends forward from top to bottom in the third direction F3, the length of the front back heat exchanger 24 in the third direction F3 is L4, and the length of the front heat exchanger 23 in the third direction F3 is L2, wherein L4 < L2.

Specifically, the wall-mounted air conditioning indoor unit 100 may further include an electric control device 6 disposed in front of the heat exchange assembly 2, and the electric control device 6 may control operations of various electric components in the wall-mounted air conditioning indoor unit 100, such as controlling the cross-flow wind wheel 4, controlling the air deflector to open and close the air outlet 12, and the like. The heat exchange assembly 2 may further include a front heat exchanger 23, a lower heat exchanger 25, and a front back heat exchanger 24, wherein an upper end of the front heat exchanger 23 is connected to an upper end of the back heat exchanger 21, the front heat exchanger 23 extends forward from top to bottom in a third direction F3, a lower end of the front heat exchanger 23 and a lower end of the back heat exchanger 21 are away from each other, so that the front heat exchanger 23 and the back heat exchanger 21 look like a "eight-headed shape" in a preset cross section of the wall-mounted air conditioning indoor unit 100, the front back heat exchanger 24 is disposed on a windward side of the front heat exchanger 23 and also extends forward from top to bottom in the third direction F3, the lower heat exchanger 25 is disposed below the front heat exchanger 23 and in front of the cross-flow wind wheel 4, and lengths of the front heat exchanger 23 and the front back heat exchanger 24 measured in the third direction F3 are, respectively, L2 and L4, and L4 < L2.

When the wall-mounted air conditioner indoor unit 100 works, air entering the casing 1 can exchange heat through the rear heat exchanger 21, the rear heat exchanger 22, the front heat exchanger 23, the front heat exchanger 24 and the lower heat exchanger 25, the contact area between the heat exchange assembly 2 and the air is increased, the heat exchange effect can be better, and therefore the wall-mounted air conditioner indoor unit 100 can have higher energy efficiency.

In some embodiments, as shown in fig. 1, the length of the casing 1 is a, the height of the casing 1 is B, and the thickness of the casing 1 is C, where a is less than or equal to 800mm, B is less than or equal to 298mm, and 375mm is less than or equal to 400mm, so that the external dimension of the wall-mounted air conditioning indoor unit 100 can be relatively smaller, and the indoor space occupied by the wall-mounted air conditioning indoor unit 100 can be reduced.

Other configurations, such as a louver, etc., and operations of the wall-mounted air conditioning indoor unit 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, 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 implicitly indicating 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 invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the 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

1. An indoor unit of a wall-mounted air conditioner, comprising:

the air conditioner comprises a shell, a fan and a controller, wherein the top of the shell is provided with an air inlet, and the bottom of the shell is provided with an air outlet;

the heat exchange assembly is arranged in the shell and comprises a rear heat exchanger arranged below the air inlet, and the rear heat exchanger inclines and extends from top to bottom along a first direction;

the air duct assembly is arranged in the shell and comprises a front air duct piece and a rear air duct piece arranged behind the front air duct piece, an air outlet duct is defined between the rear air duct piece and the front air duct piece, and the air outlet duct extends to the air outlet from the heat exchange assembly;

the cross-flow wind wheel is transversely arranged at the inlet of the air outlet duct, the upper end part of the rear air duct piece extends into the space between the cross-flow wind wheel and the rear heat exchanger, and the diameter of the cross-flow wind wheel is D;

the water receiving assembly is arranged in the shell and limits a rear water receiving tank which is arranged below the rear heat exchanger and behind the rear air duct piece,

wherein, on the preset cross section of the wall-mounted air conditioner indoor unit, the lowest point in the rear water receiving tank is used as a horizontal line, the straight-line distance between the intersection point of the horizontal line and the rear air duct piece and the upper end point of the rear air duct piece is Y1, a projection point is obtained by orthographic projection from the upper end point of the rear air duct piece to the leeward side of the rear heat exchanger, the linear distance between the projection point and the lower end point of the leeward surface of the rear heat exchanger is Y2, the horizontal length of the air inlet in the front-back direction is M, the horizontal distance from the rear end point of the rear heat exchanger to the rear end face of the shell is L, a vertical height of the rear heat exchanger is H, a length of the rear heat exchanger in the first direction is L1, wherein Y1/D is more than or equal to 1.3 and less than or equal to 2.6, Y1/Y2 is more than or equal to 1.1 and less than or equal to 1.35, L/M is more than or equal to 0.06 and less than or equal to 0.17, and H/L1 is more than or equal to 0.48 and less than or equal to 0.8.

2. The wall-mounted air conditioner indoor unit of claim 1, wherein D is 118mm ≤ D ≤ 130 mm.

3. The wall mounted indoor air conditioner of claim 1, wherein the heat exchange assembly further comprises: a back heat exchanger provided at the windward side of the back heat exchanger, the back heat exchanger also extending backwards from top to bottom along the first direction, the back heat exchanger having a length in the first direction of L3, wherein L3 < L1.

4. The wall-mounted air conditioner indoor unit of claim 3, wherein L3/L1 is 1.2. ltoreq.L 3/L1. ltoreq.2.15.

5. The wall hanging type air conditioner indoor unit of claim 3, wherein the rear heat exchanger comprises a plurality of rows of rear heat exchange tube sets arranged at intervals in a second direction perpendicular to the first direction, each row of the rear heat exchange tube sets comprises a plurality of rear heat exchange tubes arranged at intervals in the first direction, the back heat exchanger comprises a row of back heat exchange tube sets, the back heat exchange tube sets comprises a plurality of back heat exchange tubes arranged at intervals in the first direction, the number of rows of the rear heat exchange tube sets is N1, the diameter of each rear heat exchange tube is D1, the diameter of each back heat exchange tube is D2, wherein N1 is not less than 3, wherein D1 is not less than 4.7mm and not more than 6.35mm, and D2 is not more than 6 mm.

6. The wall hanging air conditioning indoor unit of claim 5, wherein the number of back heat exchange tubes is N2, where N2 is 4 or 6 or 8.

7. The wall mounted indoor air conditioner of claim 1, wherein the water receiving assembly comprises a rear water receiving pan defining the rear water receiving trough, the rear water receiving pan being separate from the rear air duct member.

8. The wall-mounted air conditioner indoor unit of any one of claims 1 to 7, further comprising an electric control device arranged in front of the heat exchange assembly, wherein the heat exchange assembly further comprises a front heat exchanger, a lower heat exchanger and a front back heat exchanger, the front heat exchanger is arranged below the air outlet and in front of the rear heat exchanger, the front heat exchanger is inclined forwards and extends forwards from top to bottom along a third direction, the upper end of the front heat exchanger is connected with the upper end of the rear heat exchanger, the lower end of the front heat exchanger is far away from the lower end of the rear heat exchanger, the lower heat exchanger is arranged below the front heat exchanger and in front of the cross-flow wind wheel, the front heat exchanger is inclined backwards and extends from top to bottom, the upper end of the lower heat exchanger is connected with the lower end of the front heat exchanger, and the front back heat exchanger is arranged on the windward side of the front heat exchanger, the front back heat exchanger also extends forwards and forwards along the third direction from top to bottom, the length of the front back heat exchanger in the third direction is L4, the length of the front heat exchanger in the third direction is L2, and L4 is less than L2.

9. The wall-mounted air conditioner indoor unit of claim 1, wherein the length of the casing is A, the height of the casing is B, and the thickness of the casing is C, wherein A is not less than 800mm, B is not less than 298mm, and 375mm is not less than 400 mm.