CN113007923B - Heat exchanger and air conditioner with same - Google Patents
Heat exchanger and air conditioner with same Download PDFInfo
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- CN113007923B CN113007923B CN202110278276.6A CN202110278276A CN113007923B CN 113007923 B CN113007923 B CN 113007923B CN 202110278276 A CN202110278276 A CN 202110278276A CN 113007923 B CN113007923 B CN 113007923B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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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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- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
Abstract
The invention provides a heat exchanger and an air conditioner with the same, wherein the heat exchanger is arranged in a shell of the air conditioner and comprises a heat exchange part, the heat exchange part is arranged obliquely to the side wall of the shell, the heat exchange part is divided into m heat exchange areas along the flowing direction of air flow in the shell, m is more than or equal to 3, and the heat exchange part comprises: the heat exchange tube sections are arranged in one-to-one correspondence with the heat exchange areas; and the heat exchange pipeline of the nth heat exchange area is communicated with the heat exchange pipeline of the (m-n +1) th heat exchange area through a connecting pipe section along the direction close to the supporting base plane of the air conditioner, wherein n is more than or equal to 1 and less than or equal to m, and (m-n +1) is not equal to n. The heat exchanger solves the problem of uneven heat exchange of each flow path in the heat exchanger of the air conditioner in the prior art.
Description
Technical Field
The invention relates to the field of heat exchangers, in particular to a heat exchanger and an air conditioner with the same.
Background
Along with the development of household air conditioners, the application of a centrifugal fan is more and more extensive, and due to the air flow circulation characteristic of the centrifugal fan, the problem that the flow velocity of windward air flow at a heat exchanger is not uniformly distributed is solved, so that the heat exchange of each flow path in the heat exchanger is not uniform, and the heat exchange performance is reduced.
Disclosure of Invention
The invention mainly aims to provide a heat exchanger and an air conditioner with the same, and aims to solve the problem that heat exchange of each flow path in the heat exchanger of the air conditioner in the prior art is uneven.
In order to achieve the above object, according to one aspect of the present invention, there is provided a heat exchanger disposed in a cabinet of an air conditioner, the heat exchanger including a heat exchanging part disposed obliquely to a side wall of the cabinet, the heat exchanging part being divided into m heat exchanging zones in a flow direction of an air flow in the cabinet, m being greater than or equal to 3, the heat exchanging part including: a plurality of heat exchange tube sections arranged in one-to-one correspondence with the plurality of heat exchange areas; and the heat exchange pipeline of the nth heat exchange area is communicated with the heat exchange pipeline of the (m-n +1) th heat exchange area through a connecting pipe section along the direction close to the supporting base plane of the air conditioner, wherein n is more than or equal to 1 and less than or equal to m, and (m-n +1) is not equal to n.
Furthermore, the number of the heat exchange areas is three, and the three heat exchange areas comprise a second heat exchange area, a first heat exchange area and a third heat exchange area which are positioned at two sides of the second heat exchange area; the number of the heat exchange pipelines is three, and the three heat exchange pipelines are arranged in one-to-one correspondence with the three heat exchange areas; and the heat exchange tube section of the first heat exchange zone is connected with the heat exchange tube section of the third heat exchange zone through a connecting tube section.
Furthermore, the number of the heat exchange parts is two, the two heat exchange parts are arranged in a V-shaped structure, and the opening of the V-shaped structure faces to one side far away from the supporting base surface of the air conditioner; the first heat exchange area is positioned on one side of the second heat exchange area far away from the supporting base surface of the air conditioner, and the third heat exchange area is positioned on one side of the second heat exchange area near the supporting base surface of the air conditioner.
Furthermore, the value range of the included angle between the heat exchange part and the side wall of the shell is 15-35 degrees.
Further, the length of the plate surface of the casing of the heat exchanging portion is L, and the length occupied by the second heat exchanging region on the plate surface of the casing is L0, where L0/L is 0.5.
Further, on the plate surface of the shell, the length occupied by the first heat exchange area is L1, the length occupied by the third heat exchange area is L2, and when the included angle between the heat exchange part and the side wall of the shell is 15-25 degrees and does not include 25 degrees, the value range of L1/L2 is 1-1.4; when the included angle between the heat exchanging part and the side wall of the casing is 25 degrees to 35 degrees and includes 25 degrees, the value range of L1/L2 is 0.7 to 1.
Further, the heat exchange part comprises a shell, and at least part of each heat exchange tube section is positioned in the shell; the heat exchange portion comprises a plurality of heat exchange tube rows which are sequentially arranged along the direction perpendicular to the surface of the shell, and any one heat exchange tube row comprises one part of each heat exchange tube section.
Furthermore, each heat exchange tube section comprises a plurality of U-shaped tube bodies which are sequentially connected end to end; the U-shaped pipe body comprises two straight pipe sections and a bent pipe section for connecting the two straight pipe sections; the two U-shaped pipe bodies are connected through a bent pipe section.
Furthermore, in two adjacent heat exchange tube rows, the projection of the heat exchange tube section of one heat exchange tube row on the surface of the shell is staggered with the projection of the heat exchange tube section of the other heat exchange tube row on the surface of the shell.
According to another aspect of the present invention, there is provided an air conditioner comprising a heat exchanger, wherein the heat exchanger is the above-mentioned heat exchanger.
Further, the air conditioner comprises a shell, an upper air inlet and a lower air inlet which are arranged on the shell; an air duct is arranged in the casing and located between the upper air inlet and the lower air inlet, a fan is arranged in the air duct, and the heat exchanger is located between the upper air inlet and the fan.
By applying the technical scheme, the heat exchange part arranged obliquely on the side wall of the shell is divided into m heat exchange areas along the airflow flowing direction in the shell, wherein m is more than or equal to 3, the flow path in the heat exchange part is divided into a plurality of heat exchange pipe sections which correspond to the heat exchange areas one by one, the heat exchange pipeline of the nth heat exchange area is communicated with the heat exchange pipeline of the (m-n +1) th heat exchange area through the connecting pipe section along the direction close to the supporting base surface of the air conditioner, n is more than or equal to 1 and less than or equal to m, and (m-n +1) is not equal to n. Therefore, the heat exchanger flow path is arranged to be adaptive to the air flow distribution of a fan of the air conditioner and to the change of the flow velocity of the windward air flow of the heat exchanger caused by the change of the air flow flowing directions of the upper air outlet cooling mode and the lower air outlet heating mode of the air conditioner, so that the circulating flow of each flow path is adaptive to the flow velocity distribution of the windward air flow of the heat exchanger during the cooling and the heating, the heat exchange performance of each flow path is correspondingly improved, the uniformity of the inlet-outlet temperature difference of each flow path of the heat exchanger is ensured, the outlet temperature of each flow path of the heat exchanger during the cooling and the heating is uniform, the cooling and heating effects of the heat exchanger are balanced, the cooling and heating performance of the heat exchanger is improved, and the problem of uneven heat exchange of each flow path in the heat exchanger of the air conditioner in the prior art is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram showing the gas flow of an air conditioner having an embodiment of the heat exchanger of the present invention in a cooling mode;
fig. 2 is a schematic view illustrating a flow path structure and a refrigerant flow direction of a heat exchanger of the air conditioner in a cooling operation state shown in fig. 1;
FIG. 3 is a schematic diagram illustrating the air flow of the air conditioner of FIG. 1 during heating operation;
fig. 4 is a schematic view illustrating a flow path structure and a refrigerant flow direction of a heat exchanger of the air conditioner in a heating operation state shown in fig. 3; and
fig. 5 is a schematic view showing a plurality of U-shaped tube portions of the heat exchanger of the air conditioner shown in fig. 1.
Wherein the figures include the following reference numerals:
1. a heat exchanging part; 100. a housing; 10. a second heat transfer zone; 11. a first heat transfer zone; 12. a third heat transfer zone; 101. a first heat exchange line; 1011. a first inlet/outlet; 1012. a second inlet/outlet; 102. a second heat exchange line; 1021. a third inlet and outlet; 1022. a fourth port; 103. a U-shaped tube body; 1031. a straight pipe section; 1032. bending the pipe section; 104. a heat exchange tube section; 105. connecting the pipe sections; 2. a housing; 21. an air inlet; 3. a fan.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 5, the present invention provides a heat exchanger, the heat exchanger is disposed in a casing 2 of an air conditioner, the heat exchanger includes a heat exchanging portion 1, the heat exchanging portion 1 is disposed obliquely to a side wall of the casing 2, the heat exchanging portion 1 is divided into m heat exchanging regions along an airflow flowing direction in the casing 2, m is greater than or equal to 3, the heat exchanging portion 1 includes: a plurality of heat exchange tube segments 104, the plurality of heat exchange tube segments 104 being arranged in one-to-one correspondence with the plurality of heat exchange areas; along the direction close to the supporting base plane of the air conditioner, the heat exchange pipeline of the nth heat exchange area is communicated with the heat exchange pipeline of the (m-n +1) th heat exchange area through a connecting pipe section 105, wherein n is more than or equal to 1 and less than or equal to m, and (m-n +1) is not equal to n.
According to the heat exchanger, the heat exchange part 1 arranged obliquely on the side wall of the shell 2 is divided into m heat exchange areas along the airflow flowing direction in the shell 2, m is larger than or equal to 3, the flow path in the heat exchange part 1 is divided into a plurality of heat exchange pipe sections 104 corresponding to the heat exchange areas one by one, the heat exchange pipeline of the nth heat exchange area is communicated with the heat exchange pipeline of the (m-n +1) th heat exchange area through the connecting pipe section 105 along the direction close to the supporting base surface of the air conditioner, wherein n is larger than or equal to 1 and smaller than or equal to m, and (m-n +1) is not equal to n. Thus, the heat exchanger flow path is arranged to be adaptive to the airflow distribution of the fan 3 of the air conditioner and to the change of the flow velocity of the windward airflow of the heat exchanger caused by the change of the airflow flowing directions of the upper air-out cooling mode and the lower air-out heating mode of the air conditioner, so that the circulating flow of each flow path is adaptive to the flow velocity distribution of the windward airflow of the heat exchanger during the cooling and the heating, the heat exchange performance of each flow path is correspondingly improved, the uniformity of the inlet-outlet temperature difference of each flow path of the heat exchanger is ensured, the outlet temperature of each flow path of the heat exchanger during the cooling and the heating is uniform, the cooling and the heating effects of the heat exchanger are balanced, the cooling and the heating performance of the heat exchanger are improved, and the problem of uneven heat exchange of each flow path in the heat exchanger of the air conditioner in the prior art is solved.
Specifically, the flow direction of the air flow in the casing 2 is a direction close to or away from the support base of the air conditioner.
Preferably, there are three heat exchange areas, and the three heat exchange areas include the second heat exchange area 10 and the first heat exchange area 11 and the third heat exchange area 12 located at both sides of the second heat exchange area 10; the number of the heat exchange pipelines is three, and the three heat exchange pipelines are arranged in one-to-one correspondence with the three heat exchange areas; the heat exchange tube section 104 of the first heat exchange zone 11 and the heat exchange tube section 104 of the third heat exchange zone 12 are connected by a connecting tube section 105.
The heat exchange pipe sections 104 of the second heat exchange zone 10 form a first heat exchange pipeline 101 separately, and the refrigerant of the first heat exchange pipeline 101 exchanges heat only in the second heat exchange zone 10; the two heat exchange tube sections 104 and the connecting tube section 105 of the first heat exchange zone 11 and the third heat exchange zone 12 together constitute a second heat exchange line 102. The refrigerant in the second heat exchange pipeline 102 exchanges heat by flowing through the region with the lower airflow velocity and then flows to the region with the higher airflow velocity through the connecting pipe section 105 crossing the second heat exchange zone 10.
Wherein first heat exchange line 101 and second heat exchange line 102 are connected in parallel with each other.
Specifically, the number of the heat exchange parts 1 is two, the two heat exchange parts 1 are arranged in a V-shaped structure, and the opening of the V-shaped structure faces to one side far away from a supporting base surface of the air conditioner; the first heat exchange zone 11 is located on the side of the second heat exchange zone 10 away from the supporting base surface of the air conditioner, and the third heat exchange zone 12 is located on the side of the second heat exchange zone 10 close to the supporting base surface of the air conditioner.
Specifically, the arrangement of the heat exchanger in the casing 2 ensures that the airflow entering the casing 2 can flow out of the casing 2 only after heat exchange by the heat exchanger. The two heat exchanging parts 1 arranged in a V-shaped structure divide the area between the upper air inlet 21 and the fan 3 of the casing 2 into an area A and an area B which are respectively positioned between the two heat exchanging parts 1 and the fan 3 and an area C which is positioned between the upper air inlet 21 and the heat exchanger.
Preferably, the included angle between the heat exchanging part 1 and the side wall of the casing 2 ranges from 15 degrees to 35 degrees. In this way, the heat exchange area of the heat exchanger can be increased by the inclined arrangement between the heat exchanging portion 1 and the side wall of the casing 2. When the contained angle between the lateral wall of heat transfer portion 1 and casing 2 is less than 15 degrees, can lead to the air current velocity of flow distribution of the face of the casing 100 of heat transfer portion 1 serious inhomogeneous, the heat transfer effect is relatively poor, when the contained angle between the lateral wall of heat transfer portion 1 and casing 2 is greater than 35 degrees, can lead to the volume increase of air conditioner because of the increase of the size of horizontal direction.
Preferably, the length of the plate surface of the casing 100 of the heat exchange portion 1 is L, and the length occupied by the second heat exchange zone 10 on the plate surface of the casing 100 is L0, where L0/L is 0.5.
Preferably, on the plate surface of the casing 100, the length occupied by the first heat exchange region 11 is L1, the length occupied by the third heat exchange region 12 is L2, and when the included angle between the heat exchange portion 1 and the side wall of the casing 2 is 15 degrees to 25 degrees, and does not include 25 degrees, the value range of L1/L2 is 1 to 1.4; when the included angle between the heat exchanging part 1 and the side wall of the casing 2 is 25 degrees to 35 degrees and includes 25 degrees, the value range of L1/L2 is 0.7 to 1.
According to the difference of the included angle between the heat exchanging part 1 and the side wall of the casing 2, different airflow velocity distributions can be generated on the plate surface of the casing 100 of the heat exchanging part 1, when the included angle is small (the side walls of the heat exchanging part 1 and the casing 2 are closer to be parallel to each other), the second heat exchanging area 10 is more deviated to one side of the corresponding heat exchanging part 1 close to the supporting base surface of the air conditioner, and when the included angle is large (the side walls of the heat exchanging part 1 and the casing 2 are closer to be perpendicular to each other), the second heat exchanging area 10 is more deviated to one side of the corresponding heat exchanging part 1 far away from the supporting base surface of the air conditioner.
The invention simulates the flow velocity distribution situation of the windward airflow of the heat exchanger by using Fluent software, divides the heat exchange part into three heat exchange areas according to the change of the flow velocity of the windward airflow, ensures that the sum of the air volume of the heat exchange area with higher airflow velocity and the air volume of the heat exchange area with lower airflow velocity is as equal as possible to the air volume of the heat exchange area with medium airflow velocity (namely the sum of the air volume of the first heat exchange area 11 and the air volume of the third heat exchange area 12 is as equal as possible to the air volume of the second heat exchange area 10), and the sum of the number of the U-shaped tube parts 103 of the heat exchange area with higher airflow velocity and the number of the U-shaped tube parts 103 of the heat exchange area with lower airflow velocity is also equal to or different by 1 from the number of the U-shaped tube parts 103 of the heat exchange area with medium airflow velocity (namely the sum of the number of the U-shaped tube parts 103 of the first heat exchange area 11 and the number of the U-shaped tube parts 103 of the third heat exchange area 12 is as equal as possible to the number of the U-shaped tube parts 103 of the second heat exchange area 10), to ensure that the heat exchange amount of each heat exchange zone is equal as much as possible.
Specifically, the heat exchange portion 1 includes a casing 100, and at least a part of each heat exchange tube segment 104 is located in the casing 100; the heat exchanging portion 1 includes a plurality of heat exchanging tube rows sequentially arranged in a direction perpendicular to the plate surface of the case 100, and any one of the heat exchanging tube rows includes a portion of each heat exchanging tube section 104.
The arrangement of the heat exchange tube banks can ensure that the air flow passing through the heat exchange part 1 exchanges heat with the heat exchange tubes of the heat exchange part 1 as much as possible, so that the temperature of the air flow flowing through the heat exchange part 1 is uniform, and the heat exchange effect of the heat exchanger is improved.
As shown in fig. 5, each heat exchange tube segment 104 comprises a plurality of U-shaped tube bodies 103 connected end to end in sequence; the hairpin tubular body 103 includes two straight tube sections 1031 and a bend section 1032 for connecting the two straight tube sections 1031; the two U-shaped tubular bodies 103 are connected by a bent tube 1032.
Preferably, the projection of the heat exchange tube section 104 of one heat exchange tube row on the plate surface of the shell 100 is staggered with the projection of the heat exchange tube section 104 of the other heat exchange tube row on the plate surface of the shell 100 in two adjacent heat exchange tube rows.
Specifically, the heat exchange portion 1 of the present invention includes two heat exchange tube rows, a projection of the straight tube section 1031 of the U-shaped tube body 103 of one heat exchange tube row on the plate surface of the housing 100 is staggered with a projection of the straight tube section 1031 of the U-shaped tube body 103 of another heat exchange tube row on the plate surface of the housing 100, so that an air flow passing through a gap between the two straight tube sections 1031 of one heat exchange tube row can contact with an outer tube wall of the straight tube section 1031 of another heat exchange tube row to exchange heat, and it is ensured that the air flow passing through the heat exchange portion 1 can exchange heat with the heat exchange tubes of the heat exchange portion 1 as much as possible, so that the temperature of the air flow passing through the heat exchange portion 1 is relatively uniform.
The invention also provides an air conditioner which comprises the heat exchanger.
Specifically, the air conditioner includes a cabinet 2 and an upper air inlet 21 and a lower air inlet provided on the cabinet 2; an air duct is arranged in the casing 2 and located between the upper air inlet 21 and the lower air inlet, a fan 3 is arranged in the air duct, and the heat exchanger is located between the upper air inlet 21 and the fan 3.
Fan 3 exports and is located the lower export of fan 3 below including the induction port that is located fan 3's axis of rotation direction both ends and the last export that is located fan 3 top, goes up export and last wind gap 21 and corresponds the setting, and export corresponds the setting with wind gap down, all is provided with movable baffle structure between induction port and last wind gap 21 and the wind gap down to make induction port and last wind gap 21 and wind gap intercommunication or disconnection down, thereby realize two kinds of mode of operation of 21 air intakes in last wind gap and the wind gap air-out down and go up wind gap 21 air-out.
Specifically, the fan 3 is a centrifugal fan, the flow path arrangement of the heat exchanger of the present invention is particularly suitable for an air conditioner using the centrifugal fan, and the flow path arrangement of the heat exchanger can adapt to the air flow distribution of the centrifugal fan, so as to better exert the heat exchange performance of the heat exchanger.
Specifically, the first heat exchange pipeline 101 includes a first inlet and outlet 1011 and a second inlet and outlet 1012 arranged at the second heat exchange zone 10; the second heat exchange pipeline 102 includes a third inlet/outlet 1021 and a fourth inlet/outlet 1022, wherein the third inlet/outlet 1021 is located in the third heat exchange area 12, and the fourth inlet/outlet 1022 is located in the first heat exchange area 11. As the opposite airflow directions in the cooling operation mode and the heating operation mode result in the exchange of positions of the windward side and the leeward side and the exchange of airflow velocity distribution, the first inlet/outlet 1011, the second inlet/outlet 1012, the third inlet/outlet 1021, and the fourth inlet/outlet 1022 can be used as a refrigerant inlet or a refrigerant outlet, and particularly, the switching is performed according to the switching of the operation modes.
In the heat exchanger, except for the second heat exchange zone 10, the refrigerant flows through the region with lower airflow velocity first and then flows through the region with higher airflow velocity.
As shown in fig. 1, when the air conditioner is in the cooling operation mode, the heat exchanger is located in the air outlet region, the air flow is accelerated and pressurized by the fan 3, then discharged from the upper outlet of the fan 3 and reaches the region a or the region B in the casing 2, then continuously flows upwards to exchange heat with the heat exchanger, and the obtained low-temperature air flow reaches the region C in the casing 2, and then discharged from the upper air inlet 21 of the casing 2, which is communicated with the region C, to the outside of the casing 2, so as to cool the indoor space.
As shown in fig. 2, according to the flow characteristics of the air flow, in the air flow velocity distribution of the windward side of the heat exchange portion 1 of the heat exchanger, the air flow velocity of the heat exchange portion 1 gradually increases along the direction away from the supporting base plane of the air conditioner, that is, the air flow velocity at the first heat exchange region 11 is greater than the air flow velocity at the second heat exchange region 10, the air flow velocity at the second heat exchange region 10 is greater than the air flow velocity at the third heat exchange region 12, and the refrigerant in the first heat exchange pipeline 101 flows in from the first inlet and outlet 1011 and flows out from the second inlet and outlet 1012; the refrigerant in the second heat exchange pipeline 102 flows in from the third inlet/outlet 1021, flows through the third heat exchange region 12, flows through the first heat exchange region 11, and flows out from the fourth inlet/outlet 1022.
As shown in fig. 3, when the air conditioner is in the heating mode, the airflow flowing direction is opposite to the cooling mode, the heat exchanger is located in the air intake area, the airflow enters the area C in the casing 2 from the air intake 21 of the casing 2, the high-temperature airflow obtained after passing through the heat exchanger reaches the area a or the area B in the casing 2, then enters the inside of the fan 3 from the air intake of the fan 3, is accelerated and pressurized by the fan 3, and is discharged to the outside of the casing 2 from the air outlet of the air conditioner for heating the room.
As shown in fig. 4, because the heat exchanging portion 1 of the heat exchanger is obliquely disposed, distances between each point on the plate surface of the housing 100 of the heat exchanging portion 1 and the air suction port of the fan 3 are different, when the air conditioner is in the heating operation mode, the airflow velocity of the heat exchanging portion 1 gradually decreases along a direction away from the supporting base surface of the air conditioner, that is, the airflow velocity at the first heat exchanging region 11 is smaller than the airflow velocity at the second heat exchanging region 10, the airflow velocity at the second heat exchanging region 10 is smaller than the airflow velocity at the third heat exchanging region 12, and the refrigerant in the first heat exchanging pipeline 101 flows in from the second inlet 1011 and the second outlet 1011 and flows out from the first inlet and the second outlet; the refrigerant in the second heat exchange pipeline 102 flows in through the fourth inlet/outlet 1022, flows through the first heat exchange region 11, flows through the third heat exchange region 12, and flows out through the third inlet/outlet 1021.
The heat exchanger of the invention makes full use of each flow velocity area by arranging the flow path, so that the heat exchange effect of each flow path of the heat exchanger is more balanced, and simultaneously, the problem of uneven distribution of the flow velocity of the windward air flow of the heat exchanger caused by different air flow modes in two different working modes of refrigeration and heating can be solved.
The flow path of the heat exchanger in the related art referred to herein is a flow path in which a refrigerant flows, such as a "n" type or a "u" type or a "n" type plus a "u" type, when viewed from the side of the heat exchanger, and is referred to as a first comparative flow path and a second comparative flow path hereinafter.
As shown in the following table, the table is a comparison table of the cooling capacity or the heating capacity of the flow path of the heat exchanger of the present invention and the comparison flow path one and the comparison flow path two of the heat exchanger in the prior art and the temperature difference of the refrigerant at the inlet and the outlet of each flow path.
Specifically, the comparison flow path one can be regarded as an upper U-shaped and lower n-shaped combined flow path, which has the characteristics of a conventional flow path, that is, in a heat exchanger with the comparison flow path one, the heat exchange portions are arranged in a V-shaped structure, the flow path of each heat exchange portion comprises a first heat exchange pipeline and a second heat exchange pipeline, the first heat exchange pipeline is an upper flow path, the second heat exchange pipeline is a lower flow path, each heat exchange portion comprises two heat exchange pipe rows, each heat exchange pipe row comprises a part of the upper flow path and a part of the lower flow path, and when viewed from the side of the heat exchange portion, a plurality of U-shaped pipe portions of the upper flow path form a U-shaped structure, and a plurality of U-shaped pipe portions of the lower flow path form an n-shaped structure.
Specifically, contrast flow path two is to the inhomogeneous condition of air current velocity of flow distribution, it is crossing with inside and outside flow path when designing the flow path, be in the heat exchanger that has contrast flow path two promptly, including two heat transfer portions that are the setting of V type structure, the flow path of each heat transfer portion all includes first heat transfer pipeline and second heat transfer pipeline, and each heat transfer portion all includes two heat transfer bank of tubes, the first half of first heat transfer pipeline is located first heat transfer bank of tubes department, the latter half of first heat transfer pipeline is located second heat transfer bank of tubes department, the first half of second heat transfer pipeline is located second heat transfer bank of tubes department, the latter half of second heat transfer pipeline is located first heat transfer bank of tubes department, this has improved the ability of refrigeration and heating to a certain extent, nevertheless adjust to the difference in each air current velocity of flow district.
In the following table, capacity refers to the amount of cooling or heating in the current flow path, in units of W; p11 represents the refrigerant temperature at the outlet of the first heat exchange line of the left heat exchange portion during cooling; p12 represents the refrigerant temperature at the outlet of the second heat exchange line of the left heat exchange portion during cooling; p21 represents the refrigerant temperature at the outlet of the first heat exchange line of the right heat exchange portion during cooling; p22 represents the refrigerant temperature at the outlet of the second heat exchange line of the right heat exchange portion during cooling; q11 represents the refrigerant temperature at the outlet of the first heat exchange pipeline of the left heat exchange part during heating; q12 represents the refrigerant temperature at the outlet of the second heat exchange pipeline of the left heat exchange part during heating; q21 represents the refrigerant temperature at the outlet of the first heat exchange pipeline of the right heat exchange part during heating; q22 represents the refrigerant temperature at the outlet of the second heat exchange pipeline of the right heat exchange part during heating; the unit of the corresponding numerical value is that when the outlet temperature is more uniform (namely the difference value is smaller), the heat exchange performance of the heat exchanger is better.
As can be seen from the above table, compared with the first comparison flow path and the second comparison flow path in the prior art, the cooling capacity and the heating capacity of the flow path of the heat exchanger of the present invention are both improved, and the temperature difference of each refrigerant outlet is also reduced.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
according to the heat exchanger, the heat exchange part 1 arranged obliquely on the side wall of the shell 2 is divided into m heat exchange areas along the airflow flowing direction in the shell 2, m is larger than or equal to 3, the flow path in the heat exchange part 1 is divided into a plurality of heat exchange pipe sections 104 corresponding to the heat exchange areas one by one, the heat exchange pipeline of the nth heat exchange area is communicated with the heat exchange pipeline of the (m-n +1) th heat exchange area through the connecting pipe section 105 along the direction close to the supporting base surface of the air conditioner, wherein n is larger than or equal to 1 and smaller than or equal to m, and (m-n +1) is not equal to n. Thus, the heat exchanger flow path is arranged to be adaptive to the airflow distribution of the fan 3 of the air conditioner and to the change of the windward airflow flow velocity of the heat exchanger caused by the change of the airflow flow directions of the upper air-out cooling mode and the lower air-out heating mode of the air conditioner, so that the circulation flow of each flow path is adaptive to the windward airflow flow velocity distribution of the heat exchanger during the cooling and the heating, the heat exchange performance of each flow path is correspondingly improved, the uniformity of the inlet-outlet temperature difference of each flow path of the heat exchanger is ensured, the outlet temperature of each flow path of the heat exchanger is uniform during the cooling and the heating, the cooling and the heating effects of the heat exchanger are balanced, the cooling and the heating performance of the heat exchanger are improved, and the problem of uneven heat exchange of each flow path in the heat exchanger of the air conditioner in the prior art is solved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A heat exchanger is arranged in a shell (2) of an air conditioner, and is characterized by comprising a heat exchanging part (1), wherein the heat exchanging part (1) is arranged obliquely to the side wall of the shell (2),
the heat exchanging part (1) is divided into m heat exchanging areas along the flowing direction of the airflow in the shell (2), wherein m is more than or equal to 3;
the heat exchange part (1) comprises a plurality of heat exchange pipe sections (104), and the heat exchange pipe sections (104) are arranged in one-to-one correspondence with the heat exchange areas;
along the direction close to the supporting base plane of the air conditioner, the heat exchange pipeline of the nth heat exchange area is communicated with the heat exchange pipeline of the (m-n +1) th heat exchange area through a connecting pipe section (105), wherein n is more than or equal to 1 and less than or equal to m, and (m-n +1) is not equal to n;
the number of the heat exchange areas is three, and the three heat exchange areas comprise a second heat exchange area (10), a first heat exchange area (11) and a third heat exchange area (12) which are positioned at two sides of the second heat exchange area (10);
the number of the heat exchange pipelines is three, and the three heat exchange pipelines are arranged in one-to-one correspondence with the three heat exchange areas; the heat exchange tube section (104) of the first heat exchange zone (11) and the heat exchange tube section (104) of the third heat exchange zone (12) are connected through the connecting tube section (105);
the length of the plate surface of the shell (100) of the heat exchanging part (1) is L, and the length occupied by the second heat exchanging zone (10) on the plate surface of the shell (100) is L0, wherein L0/L is 0.5;
the length occupied by the first heat exchange zone (11) is L1, the length occupied by the third heat exchange zone (12) is L2,
when the included angle between the heat exchanging part (1) and the side wall of the casing (2) is 15-25 degrees and does not include 25 degrees, the value range of L1/L2 is 1-1.4;
when the included angle between the heat exchanging part (1) and the side wall of the casing (2) is 25 degrees to 35 degrees and includes 25 degrees, the value range of L1/L2 is 0.7 to 1.
2. The heat exchanger according to claim 1, characterized in that the number of the heat exchanging portions (1) is two, and the two heat exchanging portions (1) are arranged in a V-shaped structure, and the opening of the V-shaped structure faces to the side far away from the supporting base surface of the air conditioner; the first heat exchange area (11) is positioned on one side of the second heat exchange area (10) far away from the supporting base surface of the air conditioner, and the third heat exchange area (12) is positioned on one side of the second heat exchange area (10) close to the supporting base surface of the air conditioner.
3. The heat exchanger according to claim 1 or 2, characterized in that the angle between the heat exchanging part (1) and the side wall of the casing (2) ranges from 15 degrees to 35 degrees.
4. The heat exchanger according to claim 1, characterized in that said heat exchange portion (1) comprises a casing (100), at least part of each of said heat exchange tube sections (104) being located inside said casing (100); the heat exchange part (1) comprises a plurality of heat exchange tube rows which are sequentially arranged along the direction vertical to the plate surface of the shell (100), and any one heat exchange tube row comprises a part of each heat exchange tube section (104).
5. The heat exchanger according to claim 1 or 4, wherein each of the heat exchange tube sections (104) comprises a plurality of U-shaped tube bodies (103) connected end to end in series; the hairpin tube body (103) comprising two straight tube sections (1031) and a bend section (1032) for connecting the two straight tube sections (1031); the two U-shaped tube bodies (103) are connected through the bent tube section (1032).
6. The heat exchanger according to claim 4, wherein projections of the heat exchange tube segments (104) of one of the heat exchange tube rows on the plate surface of the shell (100) are staggered from projections of the heat exchange tube segments (104) of the other heat exchange tube row on the plate surface of the shell (100).
7. An air conditioner comprising a heat exchanger, wherein the heat exchanger is as claimed in any one of claims 1 to 6.
8. The air conditioner according to claim 7, wherein the air conditioner comprises a cabinet (2) and an upper air inlet (21) and a lower air inlet provided on the cabinet (2); an air duct is arranged in the machine shell (2) and located between the upper air opening (21) and the lower air opening, a fan (3) is arranged in the air duct, and the heat exchanger is located between the upper air opening (21) and the fan (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110278276.6A CN113007923B (en) | 2021-03-12 | 2021-03-12 | Heat exchanger and air conditioner with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110278276.6A CN113007923B (en) | 2021-03-12 | 2021-03-12 | Heat exchanger and air conditioner with same |
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| Publication Number | Publication Date |
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| CN113007923A CN113007923A (en) | 2021-06-22 |
| CN113007923B true CN113007923B (en) | 2022-05-17 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060087173A (en) * | 2005-01-28 | 2006-08-02 | 엘지전자 주식회사 | Heat exchanger for use in air conditioner |
| CN205014687U (en) * | 2015-09-02 | 2016-02-03 | 珠海格力电器股份有限公司 | Heat exchanger and air conditioner with heat exchanger |
| JP6704361B2 (en) * | 2017-01-13 | 2020-06-03 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| US11112149B2 (en) * | 2017-03-09 | 2021-09-07 | Mitsubishi Electric Corporation | Heat exchanger and air-conditioning apparatus |
| CN106871496B (en) * | 2017-04-01 | 2019-12-31 | 青岛海尔空调器有限总公司 | Indoor heat exchanger and air conditioner |
| CN110220296A (en) * | 2019-03-06 | 2019-09-10 | 青岛海信日立空调***有限公司 | A kind of heat exchanger and air conditioner |
| CN210511924U (en) * | 2019-08-02 | 2020-05-12 | 珠海格力电器股份有限公司 | Air conditioner |
| CN112303733A (en) * | 2019-08-02 | 2021-02-02 | 珠海格力电器股份有限公司 | Air conditioner |
| CN112460687A (en) * | 2020-12-18 | 2021-03-09 | 珠海格力电器股份有限公司 | Heat exchanger and air conditioner |
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