CN109282482B - Machine in heat exchanger subassembly and air conditioning - Google Patents
Machine in heat exchanger subassembly and air conditioning Download PDFInfo
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- CN109282482B CN109282482B CN201811028542.4A CN201811028542A CN109282482B CN 109282482 B CN109282482 B CN 109282482B CN 201811028542 A CN201811028542 A CN 201811028542A CN 109282482 B CN109282482 B CN 109282482B
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- 238000004378 air conditioning Methods 0.000 title claims description 8
- 239000003507 refrigerant Substances 0.000 description 22
- 238000013461 design Methods 0.000 description 14
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a heat exchanger component and an air conditioner indoor unit, wherein the heat exchanger component comprises: the heat exchanger comprises a front heat exchanger, a middle heat exchanger and a rear heat exchanger, wherein the front heat exchanger, the middle heat exchanger and the rear heat exchanger are respectively provided with at least two rows of heat exchange tubes; the heat exchange flow path of the heat exchanger assembly comprises a first flow path and a second flow path which are mutually connected in parallel and flow into the heat exchanger, and the first flow path and the second flow path share all heat exchange tubes of the heat exchanger assembly; the first flow path comprises a first main path, a first branch path and a second branch path, wherein the first branch path and the second branch path are formed by shunting from the first main path; the first main path and the second main path flow through partial heat exchange tubes of the middle heat exchanger, and at least two of the first branch path, the second branch path, the third branch path and the fourth branch path share the arrangement of the rest heat exchange tubes of the middle heat exchanger. The technical scheme of the invention can improve the energy efficiency of the heat exchanger assembly.
Description
Technical Field
The invention relates to the technical field of air conditioner products, in particular to a heat exchanger assembly and an air conditioner indoor unit.
Background
With the continuous promotion of the energy efficiency standard of air conditioners at home and abroad, how to improve the heat exchange efficiency of the heat exchanger of the air conditioner becomes the problem to be solved urgently. Among many solutions, it is an effective way to use a heat exchanger with high heat exchange efficiency in a completely new air conditioner or to replace a heat exchanger with low heat exchange performance of a mass-produced air conditioner with a heat exchanger with high heat exchange efficiency.
The existing air conditioner heat exchanger with better heat exchange performance generally comprises a front heat exchanger, a middle heat exchanger and a rear heat exchanger, the three are arranged in a semi-surrounding manner, when the air conditioner heat exchanger is in a refrigerating working condition, a refrigerant is divided into two paths by a double-path pipe and respectively enters the front heat exchanger, the middle heat exchanger and the rear heat exchanger for heat exchange, the heat exchange area of the double-path is limited and the heat exchange amount in unit time is reduced, the double-path after entering the heat exchanger is subjected to secondary flow dividing design in the prior art, the double-path is usually divided into four paths so as to increase the heat exchange amount of the heat exchanger in unit time, the prior art is well known to be limited by a rectangular space of an air conditioner shell, the sizes of the heat exchangers are different, so that the number of heat exchange pipes is different (the number of heat exchange pipes of the middle heat exchanger is usually the largest), so that the overall energy efficiency of the air conditioning heat exchanger is still poor.
Disclosure of Invention
The invention mainly aims to provide a heat exchanger assembly, and aims to solve the technical problem that an air conditioner heat exchanger with a double flow path divided into four flow paths in the prior art is poor in energy efficiency.
To achieve the above object, the present invention provides a heat exchanger assembly comprising:
the heat exchanger comprises a front heat exchanger, a middle heat exchanger and a rear heat exchanger, wherein at least two rows of heat exchange tubes are arranged in the front heat exchanger, the middle heat exchanger and the rear heat exchanger in the air inlet direction, and the number of the heat exchange tubes of the middle heat exchanger is larger than that of the front heat exchanger and that of the rear heat exchanger; wherein,
when the heat exchanger assembly is used for refrigerating, the heat exchange flow path of the heat exchanger assembly comprises a first flow path and a second flow path which are mutually connected in parallel and flow into the middle heat exchanger, the first flow path and the second flow path share all heat exchange tubes of the heat exchanger assembly, and the first flow path and the second flow path flow from the heat exchange tubes on the windward side to the heat exchange tubes on the leeward side of the heat exchanger assembly; the first flow path comprises a first main path, a first branch path and a second branch path, wherein the first branch path and the second branch path are formed by branching from the first main path;
the first main path and the second main path flow through partial heat exchange tubes of the middle heat exchanger, and at least two of the first branch path, the second branch path, the third branch path and the fourth branch path share the arrangement of the rest heat exchange tubes of the middle heat exchanger.
Optionally, a difference between every two of the numbers of the heat exchange tubes flowing through the first branch, the second branch, the third branch and the fourth branch is less than or equal to 3.
Optionally, the front heat exchanger, the middle heat exchanger and the rear heat exchanger are all provided with three rows of heat exchange tubes, and the total number of the heat exchange tubes of the heat exchanger assembly is 28-31.
Optionally, the heat exchange tubes of the front heat exchanger include a first outer row, the heat exchange tubes of the middle heat exchanger include a second outer row, the heat exchange tubes of the rear heat exchanger include a third outer row, and the first outer row, the second outer row and the third outer row are located on the windward side of the heat exchanger assembly; wherein
When the heat exchanger assembly is refrigerating, the first main circuit and the second main circuit are both flowed in from the second external flow; the first main path flows towards one side close to the front heat exchanger along the second outer row, enters the first outer row through a first crossover pipe, and then is divided into a first branch and a second branch; the second main path flows towards one side close to the rear heat exchanger along the second outer row, enters the third outer row through a second jumper tube, and then is divided into the third branch and a fourth branch.
Optionally, the heat exchange tubes of the front heat exchanger further comprise a first inner row and a first middle row located between the first inner row and the first outer row, and the heat exchange tubes of the middle heat exchanger further comprise a second inner row and a second middle row located between the second inner row and the second outer row; wherein,
when the heat exchanger assembly is used for refrigerating, the first branch flows along the first outer row towards one side close to the middle heat exchanger, enters the second middle row through a third crossover pipe, flows along the second middle row towards one side close to the rear heat exchanger, enters the second inner row, and flows out through the heat exchange tubes of the second inner row; the second branch flows along the first outer row towards one side far away from the middle heat exchanger, sequentially flows through the whole first middle row and the first inner row, then flows out through the heat exchange tubes of the first inner row, or enters the second inner row through a fourth crossover connection tube, flows through the rest part of the second inner row, and then flows out through the heat exchange tubes of the second inner row.
Optionally, the heat exchange tubes of the rear heat exchanger further include a third inner row and a third middle row located between the third inner row and the third outer row, and the heat exchange tubes of the middle heat exchanger further include a second inner row and a second middle row located between the second inner row and the second outer row; wherein,
when the heat exchanger assembly is used for refrigerating, the third branch sequentially passes through the third outer row, the third middle row and the heat exchange tubes on one side, close to the middle heat exchanger, of the third inner row, enters the second inner row through a fifth jumper tube, flows into the second middle row, flows along the second middle row towards one side, close to the front heat exchanger, enters the second inner row, and flows out through the heat exchange tubes of the second inner row; and the fourth branch flows along the first outer row towards the side far away from the middle heat exchanger, flows through the rest parts of the third outer row, the third middle row and the third inner row, and flows out through the heat exchange tubes of the third inner row.
The invention also provides an air-conditioning indoor unit, which comprises a heat exchanger component and a casing for accommodating the heat exchanger component, wherein the heat exchanger component comprises:
the heat exchanger comprises a front heat exchanger, a middle heat exchanger and a rear heat exchanger, wherein at least two rows of heat exchange tubes are arranged in the front heat exchanger, the middle heat exchanger and the rear heat exchanger in the air inlet direction, and the number of the heat exchange tubes of the middle heat exchanger is larger than that of the front heat exchanger and that of the rear heat exchanger; wherein,
when the heat exchanger assembly is used for refrigerating, the heat exchange flow path of the heat exchanger assembly comprises a first flow path and a second flow path which are mutually connected in parallel and flow into the middle heat exchanger, the first flow path and the second flow path share all heat exchange tubes of the heat exchanger assembly, and the first flow path and the second flow path flow from the heat exchange tubes on the windward side to the heat exchange tubes on the leeward side of the heat exchanger assembly; the first flow path comprises a first main path, a first branch path and a second branch path, wherein the first branch path and the second branch path are formed by branching from the first main path;
the first main path and the second main path flow through partial heat exchange tubes of the middle heat exchanger, and at least two of the first branch path, the second branch path, the third branch path and the fourth branch path share the arrangement of the rest heat exchange tubes of the middle heat exchanger.
Optionally, a width dimension of the casing along the front-back direction is less than 800mm, and a height dimension of the casing along the up-down direction is less than 295 mm.
Optionally, when the heat exchanger assembly is disposed in the casing, an included angle between the arrangement direction of the rear heat exchangers and the vertical direction is 38 ° to 48 °.
Optionally, the ends of the middle heat exchanger and the rear heat exchanger which are close to each other abut against each other; or
A gap is reserved between the ends, close to each other, of the middle heat exchanger and the rear heat exchanger, the indoor unit of the air conditioner further comprises a wind shield, and the wind shield is bridged between windward sides of the ends, close to each other, of the middle heat exchanger and the rear heat exchanger.
According to the technical scheme, the first main path and the second main path of the heat exchange flow path are connected into the heat exchanger, and are respectively divided into the first branch path, the second branch path, the third branch path and the fourth branch path in the subsequent flowing process, and at least two of the four branch paths share the rest of heat exchange tubes of the heat exchanger, so that on the basis that two paths enter and exit the flow path in four paths under the refrigeration working condition, each branch path effectively shares the heat exchange tubes of the middle heat exchanger with larger size and more heat exchange tubes, and therefore the heat exchange tubes of the middle heat exchanger are prevented from being independently born by any branch path, the load is too large, the heat exchange energy efficiency of a guided refrigerant is too low, the overall energy efficiency of the heat exchanger assembly is reduced, in other words, the heat exchange tubes of the middle heat exchanger are shared, the balance of the overall heat exchange of the heat exchanger assembly is better.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of an indoor unit of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic flow diagram of the heat exchanger assembly of FIG. 1.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a heat exchanger assembly and an air conditioner indoor unit with the same.
In this embodiment, referring to fig. 1, the indoor unit of an air conditioner is a wall-mounted indoor unit of an air conditioner, and specifically includes a casing 3 and a cross-flow wind wheel 4 disposed in the casing 3, and certainly, the heat exchanger assembly 1 is also disposed in the casing 3 and located between an air inlet on the casing 3 and the cross-flow wind wheel 4, so as to exchange heat for air sucked by the cross-flow wind wheel 4. It is easy to understand that, in this embodiment, the side of the wall-mounted air conditioning indoor unit facing the user after being assembled is taken as the front, and the side facing the wall is taken as the rear, and the wall-mounted air conditioning indoor unit adopts a conventional operation mode of an upper air inlet and a lower air outlet, that is, the heat exchanger assembly 1 is located on the upper side of the cross flow wind wheel 4. It should be noted that the present design is not limited to this, and in other embodiments, the air conditioning indoor unit may also be specifically a vertical indoor air conditioner or the like.
In an embodiment of the present invention, referring to fig. 1 and 2, the heat exchanger assembly 1 includes:
the heat exchanger comprises a front heat exchanger 11, a middle heat exchanger 12 and a rear heat exchanger 13, wherein the front heat exchanger 11, the middle heat exchanger 12 and the rear heat exchanger 13 are respectively provided with at least two rows of heat exchange tubes in the air inlet direction, and the number of the heat exchange tubes of the middle heat exchanger 12 is larger than that of the front heat exchanger 11 and that of the rear heat exchanger 13; wherein,
when the heat exchanger component 1 is used for refrigerating, the heat exchange flow path 2 of the heat exchanger component 1 comprises a first flow path and a second flow path which are mutually connected in parallel and flow into the middle heat exchanger 12, the first flow path and the second flow path share all heat exchange tubes of the heat exchanger component 1, and the first flow path and the second flow path flow from the heat exchange tubes on the windward side to the heat exchange tubes on the leeward side of the heat exchanger component 1; the first flow path includes a first main path 21, and a first branch 211 and a second branch 212 branched from the first main path 21, and the second flow path includes a second main path 22, and a third branch 221 and a fourth branch 222 branched from the second main path 22;
the first main path 21 and the second main path 22 both flow through part of the heat exchange tubes of the middle heat exchanger 12, and at least two of the first branch path 211, the second branch path 212, the third branch path 221 and the fourth branch path 222 share the arrangement of the rest of the heat exchange tubes of the middle heat exchanger 12.
First, with respect to the flow path design of the main heat exchanger, the influence of the number of flow paths on APF (energy efficiency ratio) is as follows:
| flow path | APF | |
| 4 in and 4 out | 6.32 | |
| 3 in and 3 out | 6.21 | |
| 2 in and 4 out | 6.42 |
TABLE 1
As can be seen from comparing the corresponding relationship between the different flow path numbers and the APFs in table 1, the energy efficiency of the two-in four-out mode adopted in this embodiment is the highest, and therefore, the scheme of branching the first main path 21 into the first branch path 211 and the second branch path 212, and branching the second main path 22 into the third branch path 221 and the fourth branch path 222 is adopted in the present invention.
In this embodiment, referring to fig. 2, three rows of heat exchange tubes are arranged in the front heat exchanger 11, the middle heat exchanger 12 and the rear heat exchanger 13 in the air intake direction, so that not only is insufficient heat exchange caused by too few rows of heat exchange tubes avoided, but also waste of the structure caused by too many heat exchange tubes is prevented; of course, in other embodiments, in order to meet different heat exchange requirements of the heat exchangers, two rows or four rows of heat exchange tubes may be arranged in the air intake direction, and the design is not limited thereto. Specifically, the heat exchange tubes of the front heat exchanger 11 include a first outer row 111, a first middle row 113 and a first inner row 112, the heat exchange tubes of the middle heat exchanger 12 include a second outer row 121, a second middle row 123 and a second inner row 122, the heat exchange tubes of the rear heat exchanger 13 include a third outer row 131, a third middle row 133 and a third inner row 132, and the first outer row 111, the second outer row 121 and the third outer row 131 are all located on the windward side of the main body heat exchanger. Particularly, a gap should be avoided as much as possible between the ends of the middle heat exchanger 12 and the rear heat exchanger 13 close to each other, in this embodiment, the size of the special casing 3 of the indoor unit of the air conditioner is limited, a gap is reserved between the ends of the middle heat exchanger 12 and the rear heat exchanger 13 close to each other, so as to avoid that air entering from the air inlet directly enters the cross flow wind wheel 4 without passing through the heat exchanger assembly 1, in this embodiment, a wind shield 16 is further bridged between the windward sides of the middle heat exchanger 12 and the rear heat exchanger 13; for example, but not limited to, two ends of the wind shield 16 are respectively attached to the middle heat exchanger 12 and the rear heat exchanger 13 through sponges, so that the wind shield 16 is connected with the heat exchangers, the sealing performance of the contact part of the wind shield 16 and the heat exchangers is guaranteed, and the sponge attaching mode is also beneficial for a user to detach the wind shield 16 when the heat exchanger assembly 1 needs to be repaired or replaced; of course, in other embodiments, the wind deflector 16 may be mounted to the middle heat exchanger 12 and the rear heat exchanger 13 by screw locking, and the design is not limited thereto. If a large gap exists between the front heat exchanger 11 and the middle heat exchanger 12, a wind screen 16 may be additionally arranged between the front heat exchanger and the middle heat exchanger to avoid air leakage of the heat exchanger assembly 1.
It can be understood that the heat exchange cycle system of the air conditioner includes an outdoor heat exchanger, a compressor, etc. in addition to the heat exchanger assembly 1 located indoors. In this embodiment, one end of the distributor 15 is connected to the main heat exchanger, and the other end is connected to the first refrigerant header pipe 24, and the first refrigerant header pipe 24 is used for connecting to the outdoor heat exchanger.
In this embodiment, referring to fig. 1 and fig. 2, when the heat exchanger assembly 1 performs refrigeration, a refrigerant sent by a compressor first exchanges heat through an outdoor heat exchanger, and then passes through the first refrigerant header pipe 24 and is divided into the first main path 21 and the second main path 22, the first main path 21 and the second main path 22 flow in from the second outer row 121 of the intermediate heat exchanger 12, the first main path 21 and the second main path 22 are divided into the first branch path 211, the second branch path 212, the third branch path 221, and the fourth branch path 222 during the flow process, respectively, wherein at least two of the first branch path 211, the second branch path 212, the third branch path 221, and the fourth branch path 222 share the rest of the intermediate heat exchanger 12, and the first branch path 211, the second branch path 212, the third branch path 221, and the fourth branch path 222 converge in the second refrigerant header pipe 25 after flowing out of the heat exchanger assembly 1 and flow back to the compressor; when the heat exchanger component 1 heats, the refrigerant sent by the compressor firstly enters the heat exchanger component 1 through the second refrigerant header pipe 25, and after the refrigerant respectively flows through the first branch 211, the second branch 212, the third branch 221 and the fourth branch 222 to complete heat exchange, the refrigerant of the first branch 211 and the second branch 212 is converged to the first main pipe 21 to continue flowing, the refrigerant of the third branch 221 and the fourth branch 222 is converged to the second main pipe 22 to continue flowing, and after the refrigerant respectively completes heat exchange in the first main pipe 21 and the second main pipe 22, the refrigerant is converged to the first refrigerant header pipe 24 to enter the outdoor heat exchanger for heat exchange, and finally flows back to the compressor. Without loss of generality, when the heat exchanger assembly 1 is used for cooling, the refrigerant is branched into the first main path 21 and the second main path 22 through the distributor 15, and of course, in other embodiments, the refrigerant may also be branched through a structure such as a flute tube, and the design is not limited thereto.
In addition, it should be understood for the flow path design of the heat exchanger 12 assembly 11 in this embodiment that, under the cooling condition, the flow direction principle of the heat exchange tube from the outer side (windward side) to the inner side (leeward side) is adopted in both the first flow path and the second flow path, so as to increase the heat exchange temperature difference and improve the heat exchange efficiency to the maximum extent, and table 2 contrasts and analyzes the influence of the flow path of the heat exchanger assembly 1 gradually entering the inner side heat exchange tube from the outer side heat exchange tube under the cooling condition and the flow path of other forms on the APF (energy efficiency ratio).
TABLE 2
As can be seen from a comparison of the correspondence between the different flow path forms and the APF in table 2, the flow path form in which both of the two paths of the heat exchange tubes flow toward the inner heat exchange tube is the highest in energy efficiency.
It can be understood that, the flow path design of the first flow path and the second flow path is performed according to the size characteristics of the heat exchanger, that is, how to perform flow path distribution on the heat exchange tubes of the middle heat exchanger 12 with a larger size so as to make the number of the heat exchange tubes passed by the four branches approach to each other is mainly considered, and it is easy to understand that, on the premise that the heat exchange tubes of the front heat exchanger 11 and the rear heat exchanger 13 are already few, the main paths of the first flow path and the second flow path occupy no heat exchange tubes of the front heat exchanger 11 or the rear heat exchanger 13 as much as possible, therefore, in this embodiment, the main paths of the first flow path and the second flow path enter from the middle heat exchanger 12 to share the heat exchange tubes of the middle heat exchanger 12, the first main path 21 and the second main path 22 can be shared by the middle heat exchanger 12 or can be shared by one by the front heat exchanger 11 and the other by the rear heat exchanger, thereby avoiding any branch passing through all the remaining heat exchange tubes of the middle heat exchanger 12, i.e. passing through too many heat exchange tubes, so that the refrigerant is less energy efficient in the flow path of the rear section.
In this embodiment, the difference between every two of the numbers of the heat exchange tubes flowing through the first branch 211, the second branch 212, the third branch 221, and the fourth branch 222 is controlled to be less than or equal to 3, so as to avoid an excessive difference in heat exchange efficiency among the four heat exchange tubes, to realize heat exchange balance among the front heat exchanger 11, the middle heat exchanger 12, and the rear heat exchanger 13, and to improve the overall energy efficiency of the heat exchanger assembly 1.
In daily life, due to different designs of a user on a home space, related requirements are often provided for the size of a casing 3 of a wall-mounted air conditioner indoor unit, in the embodiment, the width dimension L of the casing 3 in the front-back direction is less than 800mm, and the height dimension H of the casing 3 in the up-down direction is less than 295 mm; for the heat exchanger assembly 1 adapted to the size of the casing 3, the total number of the heat exchange tubes in the main body heat exchanger is set to be 28-31, so as to ensure that the heat exchanger assembly 1 maintains high energy efficiency in a limited installation space, and particularly, in the embodiment, the number of the heat exchange tubes in the main body heat exchanger is 30. In addition, the cross-flow wind wheel 4 is limited in the casing 3 with the size range, the energy efficiency and the space occupation of the cross-flow wind wheel 4 are comprehensively considered, the diameter D of the cross-flow wind wheel 4 is selected to be 115 mm-125 mm, the distance S between the inner side surface of the main heat exchanger and the outer side surface of the cross-flow wind wheel 4 is kept to be larger than 10mm, in order to ensure that the main heat exchanger semi-surrounds the cross-flow wind wheel 4, the effect of better improving the heat exchange energy efficiency and the reliable design of condensation and drainage can be achieved, the included angle between the rear heat exchanger 13 and the vertical direction is kept to be 38-48 degrees, and the included angle between the middle heat exchanger 12 and the front.
The technical proposal of the invention is that the first main path 21 and the second main path 22 of the heat exchange flow path 2 are connected with the self-centering heat exchanger 12, and are respectively divided into a first branch 211, a second branch 212, a third branch 221 and a fourth branch 222 in the subsequent flowing process, and at least two of the four branches share the rest of the heat exchange tubes of the heat exchanger 12, so that, on the basis of adopting two paths of inlet and four paths of outlet flow paths under the refrigeration working condition, each branch effectively carries out heat exchange tube sharing on the middle heat exchanger 12 with larger size and more heat exchange tubes, thereby preventing any branch circuit from independently bearing the heat exchange tube of the middle heat exchanger 12 and having too large load, so that the heat exchange energy efficiency of the guided refrigerant is too low, and further reducing the overall energy efficiency of the heat exchanger assembly 1, in other words, through the heat exchange tubes of the heat exchanger 12 in the sharing, the balance of the whole heat exchange of the heat exchanger component 1 is better, and the energy efficiency of the heat exchanger component 1 is improved.
For example, but not limited to, the heat exchange tubes of the heat exchanger assembly 1 are
The diameter of the tube, as can be appreciated,
the heat exchange tube of pipe diameter is the heat exchange tube of using extensively among the prior art, selects the heat exchange tube of this pipe diameter, is favorable to reducing the acquisition degree of difficulty of heat exchange tube to reduce heat exchanger subassembly 1's manufacturing cost. Of course, in other embodiments, the heat exchange tube of the heat exchanger assembly 1 can also be adopted
Or
The equal pipe diameters are made, and the design is not limited to the equal pipe diameters.
Further, referring to fig. 2, when the heat exchanger assembly 1 is refrigerating, both the first main path 21 and the second main path 22 flow in from the second outer row 121; the first main path 21 flows towards one side close to the front heat exchanger 11 along the second outer row 121, enters the first outer row 111 through the first crossover pipe 17, and then is divided into a first branch 211 and a second branch 212; the second main path 22 flows along the second outer row 121 toward the side close to the rear heat exchanger 13, and enters the third outer row 131 through the second jumper tube 18, and then is divided into a third branch 221 and a fourth branch 222. It can be understood that, with such an arrangement, the first main path 21 and the second main path 22 share all the heat exchange tubes of the second outer row 121, which is beneficial to the balance of the refrigerant heat exchange in the two main paths, and the first main path 21 and the second main path 22 respectively carry out shunting while entering the front heat exchanger 11 and the rear heat exchange, so as to avoid the main path occupying the heat exchange tubes of the front heat exchanger 11 and the rear heat exchanger 13, and further to be beneficial to realizing the heat exchange balance between the branches. It should be noted that, in other embodiments, the first main path 21 and the second main path 22 may also split at the heat exchange tube of the middle heat exchanger 12, and after splitting, at least one branch path is respectively extracted to respectively flow through the front heat exchanger 11 and the rear heat exchanger 13. Specifically, the first main path 21 flows through two heat exchange tubes toward the front along the second outer row 121, and the second main path 22 flows through two heat exchange tubes toward the rear along the second outer row 121.
Further, the first branch 211 flows along the first outer row 111 toward one side close to the middle heat exchanger 12, enters the second middle row 123 through the third crossover pipe, flows along the second middle row 123 toward one side close to the rear heat exchanger 13, enters the second inner row 122, and flows out through the heat exchange tubes of the second inner row 122; the second branch 212 flows along the first outer row 111 toward the side away from the middle heat exchanger 12, sequentially flows through the whole first middle row 113 and the first inner row 112, enters the second inner row 122 through the fourth crossover pipe, flows through the rest of the second inner row 122, and then flows out through the heat exchange tubes of the second inner row 122. In this embodiment, the first branch 211 enters the second middle row 123 through the heat exchange tube closest to the middle heat exchanger 12 in the first outer row 111 to effectively reduce the length of the third cross connection tube, and also reduce the gap between the front heat exchanger 11 and the middle heat exchanger 12, and the second branch 212 enters the heat exchange tube of the second inner row 122 through the fourth cross connection tube after flowing through the heat exchange tube of the front heat exchanger 11 and then flows out, considering that the number of the heat exchange tubes of the front heat exchanger 11 is generally the minimum, and if the refrigerant in the second branch 212 is discharged only after flowing through the heat exchange tube of the front heat exchanger 11, there may be energy surplus, and therefore, the refrigerant is introduced into the heat exchange tube of the middle heat exchanger 12 and then flows out. It should be noted that the design is not limited thereto, and in other embodiments, the second branch 212 may also be directly discharged through the heat exchange tubes of the first inner row 112 after flowing through the first middle row 113 and the first inner row 112.
Further, the third branch 221 sequentially passes through the heat exchange tubes on the side of the third outer row 131, the third middle row 133 and the third inner row 132 close to the middle heat exchanger 12, enters the second inner row 122 through the fifth jumper tube, flows into the second middle row 123, flows along the second middle row 123 toward the side close to the front heat exchanger 11, enters the second inner row 122, and flows out through the heat exchange tubes of the second inner row 122; the fourth branch 222 flows along the first outer row 111 toward the side away from the middle heat exchanger 12, and flows through the third outer row 131, the third middle row 133 and the rest of the third inner row 132, and then flows out through the heat exchange tubes of the third inner row 132.
In this embodiment, the third branch 221 enters the second inner row 122 through the heat exchange tube closest to the middle heat exchanger 12 in the third inner row 132, so as to effectively reduce the length of the fifth jumper tube, and also reduce the gap between the rear heat exchanger 13 and the middle heat exchanger 12, and the third branch 221 directly transfers to the second middle row 123 after entering the second inner row 122, transfers back to the second inner row 122 after finishing flowing the remaining part of the second middle row 123 forward, and flows out after finishing flowing the remaining part of the second inner row 122 backward. In addition, in this embodiment, the fourth branch 222 turns into the third middle row 133 after flowing backward the remaining part of the third outer row 131, and alternately flows forward between the third middle row 133 and the third inner row 132 until flowing backward the remaining part of the third middle row 133 and the third inner row 132, and then flows out from the heat exchange tubes of the third inner row 132. It should be noted that the present design is not limited to this, and in other embodiments, specific flow paths of the third branch 221 and the fourth branch 222 may be in other manners.
Based on the specific flow path design of the main heat exchanger in the embodiment, the influence of the distribution mode of the number of heat exchange tubes in the four branches on the APF is analyzed in table 3.
| Branch copper pipe number distribution mode | APF |
| 7+3+7+7 | 6.12 |
| 7+7+3+7 | 6.16 |
| 7+7+7+3 | 6.11 |
| 6+6+6+6 | 6.43 |
TABLE 3
Comparing the distribution mode of the number of heat exchange tubes in table 3 with the corresponding relationship of APF, it can be seen that a scheme that the first branch 211 passes through six heat exchange tubes, the second branch 212 passes through six heat exchange tubes, the third branch 221 passes through six heat exchange tubes, and the fourth branch 222 passes through six heat exchange tubes is preferably adopted, so that the energy efficiency of the heat exchanger assembly 11 is the highest; with this arrangement, the difference between the numbers of the first branch 211 and the second branch 212 passing through the heat exchange tube is 0, the difference between the numbers of the first branch 211 and the third branch 221 passing through the heat exchange tube is 0, the difference between the first branch 211 and the fourth branch 222 is 0, the difference between the numbers of the second branch 212 and the third branch 221 passing through the heat exchange tube is 0, the difference between the second branch 212 and the fourth branch 222 is 0, and the difference between the third branch 221 and the fourth branch 222 is 0, which obviously also meets the previous limitation that the difference between the numbers of the heat exchange tubes passing through any two branches is less than or equal to 3 in order to improve the energy efficiency of the heat exchanger assembly 1.
The present invention further provides an air conditioner, which includes an outdoor unit and an indoor unit, and the specific structure of the indoor unit of the air conditioner refers to the above embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. The utility model provides a heat exchanger subassembly for machine in air conditioning, its characterized in that includes:
the heat exchanger comprises a front heat exchanger, a middle heat exchanger and a rear heat exchanger, wherein at least two rows of heat exchange tubes are arranged in the front heat exchanger, the middle heat exchanger and the rear heat exchanger in the air inlet direction, and the number of the heat exchange tubes of the middle heat exchanger is larger than that of the front heat exchanger and that of the rear heat exchanger; wherein,
when the heat exchanger assembly is used for refrigerating, the heat exchange flow path of the heat exchanger assembly comprises a first flow path and a second flow path which are mutually connected in parallel and flow into the middle heat exchanger, the first flow path and the second flow path share all heat exchange tubes of the heat exchanger assembly, and the first flow path and the second flow path flow from the heat exchange tubes on the windward side to the heat exchange tubes on the leeward side of the heat exchanger assembly; the first flow path comprises a first main path, a first branch path and a second branch path, wherein the first branch path and the second branch path are formed by branching from the first main path;
the first main path and the second main path flow through partial heat exchange tubes of the middle heat exchanger, and at least two of the first branch, the second branch, the third branch and the fourth branch share the arrangement of the rest heat exchange tubes of the middle heat exchanger;
the heat exchange tubes of the front heat exchanger comprise a first outer row, the heat exchange tubes of the middle heat exchanger comprise a second outer row, the heat exchange tubes of the rear heat exchanger comprise a third outer row, and the first outer row, the second outer row and the third outer row are positioned on the windward side of the heat exchanger assembly; wherein
When the heat exchanger assembly is refrigerating, the first main circuit and the second main circuit are both flowed in from the second external flow; the first main path flows towards one side close to the front heat exchanger along the second outer row, enters the first outer row through a first crossover pipe, and then is divided into a first branch and a second branch; the second main path flows towards one side close to the rear heat exchanger along the second outer row, enters the third outer row through a second jumper tube, and then is divided into the third branch and a fourth branch.
2. The heat exchanger assembly of claim 1, wherein the difference between two of the numbers of heat exchange tubes through which the first leg, the second leg, the third leg, and the fourth leg each flow is less than or equal to 3.
3. The heat exchanger assembly as claimed in claim 2, wherein the front heat exchanger, the middle heat exchanger and the rear heat exchanger are each provided with three rows of heat exchange tubes, and the total number of the heat exchange tubes of the heat exchanger assembly is 28-31.
4. The heat exchanger assembly of claim 1, wherein the heat exchange tubes of the front heat exchanger further comprise a first inner row and a first middle row located between the first inner row and the first outer row, and the heat exchange tubes of the middle heat exchanger further comprise a second inner row and a second middle row located between the second inner row and the second outer row; wherein,
when the heat exchanger assembly is used for refrigerating, the first branch flows along the first outer row towards one side close to the middle heat exchanger, enters the second middle row through a third crossover pipe, flows along the second middle row towards one side close to the rear heat exchanger, enters the second inner row, and flows out through the heat exchange tubes of the second inner row; the second branch flows along the first outer row towards one side far away from the middle heat exchanger, sequentially flows through the whole first middle row and the first inner row, then flows out through the heat exchange tubes of the first inner row, or enters the second inner row through a fourth crossover connection tube, flows through the rest part of the second inner row, and then flows out through the heat exchange tubes of the second inner row.
5. The heat exchanger assembly of claim 1, wherein the heat exchange tubes of the rear heat exchanger further comprise a third inner row and a third middle row disposed between the third inner row and the third outer row, and the heat exchange tubes of the middle heat exchanger further comprise a second inner row and a second middle row disposed between the second inner row and the second outer row; wherein,
when the heat exchanger assembly is used for refrigerating, the third branch sequentially passes through the third outer row, the third middle row and the heat exchange tubes on one side, close to the middle heat exchanger, of the third inner row, enters the second inner row through a fifth jumper tube, flows into the second middle row, flows along the second middle row towards one side, close to the front heat exchanger, enters the second inner row, and flows out through the heat exchange tubes of the second inner row; and the fourth branch flows along the first outer row towards the side far away from the middle heat exchanger, flows through the rest parts of the third outer row, the third middle row and the third inner row, and flows out through the heat exchange tubes of the third inner row.
6. An indoor unit of an air conditioner, comprising the heat exchanger assembly as recited in any one of claims 1 to 5, and a casing for accommodating the heat exchanger assembly.
7. The indoor unit of claim 6, wherein a width dimension of the casing in a front-rear direction is less than 800mm, and a height dimension of the casing in an up-down direction is less than 295 mm.
8. The indoor unit of claim 6, wherein when the heat exchanger assembly is disposed in the casing, an angle between the arrangement direction of the rear heat exchanger and the up-down direction is in a range of 38 ° to 48 °.
9. An indoor unit of an air conditioner according to claim 6, wherein ends of the intermediate heat exchanger and the rear heat exchanger adjacent to each other abut against each other; or
A gap is reserved between the ends, close to each other, of the middle heat exchanger and the rear heat exchanger, the indoor unit of the air conditioner further comprises a wind shield, and the wind shield is bridged between windward sides of the ends, close to each other, of the middle heat exchanger and the rear heat exchanger.
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| WO2021017210A1 (en) * | 2019-07-30 | 2021-02-04 | 广东美的制冷设备有限公司 | Indoor heat exchanger and air conditioner |
| CN210861409U (en) * | 2019-11-28 | 2020-06-26 | 广东美的制冷设备有限公司 | Heat exchanger assembly and air conditioner indoor unit with same |
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