CN111435011A - Indoor unit of vertical cabinet type air conditioner - Google Patents

Abstract

The invention provides a vertical cabinet type air conditioner indoor unit. It includes: a casing, the lower part of the casing is provided with an air inlet, and the upper part is provided with an air supply port; a plurality of convection heat exchangers, which have an air flow gathering part and a convection heat exchange part, and are arranged in the casing; The two ends are open and extend in the vertical direction; the convection heat exchange part is arranged on the inner side of the airflow gathering part, and is configured to generate heat or cold energy, and transfer the heat or cold energy to the air flowing through the inside of the airflow gathering part; A plurality of airflow gathering parts are arranged coaxially in sequence along the vertical direction; and an air supply device, which is arranged in the casing, and is configured to at least promote the airflow from the air inlet to enter the inside of the airflow gathering part, and after heat exchange with the convection heat exchange part, the air is sent from the air supply. Outflow. The airflow organization of the convection heat exchanger is optimized, the overflow wind speed is increased, and the energy efficiency of the air conditioner is improved.

Description

Vertical Cabinet Air Conditioner Indoor Unit

technical field

The invention relates to the field of refrigeration and heating, in particular to a vertical cabinet type air conditioner indoor unit.

Background technique

In recent years, with the improvement of people's quality of life, more and more attention has been paid to the thermal comfort of the indoor environment, and the energy consumption of buildings, especially the energy consumption of cooling and heating, is also increasing. Comfortable heating and cooling device is one of the research hotspots in the HVAC industry. In the existing indoor units of air conditioners, finned tube evaporators are usually used. The finned tube evaporators are large in volume and high in cost. It is cumbersome, and the heat exchange performance of the existing finned tube evaporator still has room for improvement. In addition, the single-evaporator air conditioner cannot reasonably distribute the cooling capacity, and can only eliminate the sensible heat or latent heat alone. The external manifestation of high energy consumption is that the indoor climate changes rapidly and the cooling capacity is wasted.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome at least one defect of the existing air conditioner indoor unit and provide a vertical cabinet type air conditioner indoor unit.

Specifically, the present invention proposes a vertical cabinet type air conditioner indoor unit, which includes:

a casing, the lower part of the casing is provided with an air inlet, and the upper part is provided with an air outlet;

A plurality of convective heat exchangers, each of which has an airflow gathering part and a convection heat exchange part, and is arranged in the casing; and the airflow gathering part is open at both ends and along the vertical direction an extended cylindrical shape; the convection heat exchange part is arranged on the inner side of the airflow gathering part, and is configured to generate heat or cold energy, and transfer the heat or cold energy to the air flowing through the inside of the airflow gathering part; a plurality of the airflow gathering parts are arranged in sequence along the vertical direction, and a plurality of the airflow gathering parts are arranged coaxially; and

The air supply device is arranged in the casing, and is configured to at least urge the airflow to enter the inner side of each of the airflow gathering parts in sequence from the air inlet, and after heat exchange with each of the convective heat exchange parts, from the air supply Outflow.

Optionally, the vertical cabinet air conditioner indoor unit is configured to:

controlling the flow rate of the refrigerant entering the convection heat exchanger on the lowermost side at least according to the evaporation temperature of the first refrigerant, so as to dehumidify the air flow entering from the air inlet;

The flow rate of the refrigerant entering the uppermost convection heat exchanger is controlled according to at least the evaporating temperature of the second refrigerant, so as to cool the airflow entering from the lower side of the convection heat exchanger.

Optionally, the vertical cabinet type air conditioner indoor unit further includes a water receiving tray, which is arranged on the lower side of the convection heat exchanger on the lowermost side; the position of the air inlet is higher than the water receiving tray, and is lower than the water receiving tray. The airflow gathering part on the lowermost side.

Optionally, the air supply device includes one or more first fans, and each of the first fans is disposed between two adjacent airflow gathering parts.

Optionally, the air supply device further includes a second fan, which is disposed on the upper side of the uppermost airflow gathering portion.

Optionally, each of the first fans is an axial flow fan, and the second fan is a centrifugal fan.

Optionally, each of the convective heat exchange portion and the corresponding airflow gathering portion defines a plurality of airflow channels extending along the axial direction of the airflow gathering portion.

Optionally, each of the convective heat exchange parts includes a refrigerant pipeline and a heat dissipation fin disposed on the refrigerant pipeline.

Optionally, the refrigerant pipeline includes a plurality of heat exchange plates, and each of the heat exchange plates has a first edge and a second edge extending along the axial direction of the airflow gathering portion; the first edge is provided with In the middle of the inner space of the airflow gathering portion, the second edge is connected to the inner wall surface of the airflow gathering portion; each of the heat exchange plates is provided with a plurality of first refrigerant passages; or,

The refrigerant pipeline includes one or more cylindrical structures arranged coaxially, and each of the cylindrical structures is arranged coaxially with the airflow gathering portion; the cylindrical structure includes at least one heat exchange cylinder, each of which is One or more second refrigerant passages are arranged on the cylinder wall of the heat exchange cylinder.

Optionally, each of the convective heat exchange parts is an integral piece, and is formed by an extrusion process; And it is formed by extrusion process.

In the vertical cabinet type air conditioner indoor unit of the present invention, because of the convective heat exchanger, the airflow organization of the convective heat exchanger is optimized, the overflow wind speed is increased, the local resistance of the refrigerant pipeline such as elbows is reduced, and the The heat transfer coefficient achieves the purpose of reducing production costs, reducing occupied space, improving heat transfer coefficient, and promoting the improvement of air conditioning energy efficiency. Further, the production process is reduced, such as integral extrusion and integral molding of convection heat exchangers.

Further, in the vertical cabinet air conditioner indoor unit of the present invention, the convection heat exchanger on the lower side can be used for dehumidification, and the convection heat exchanger on the upper side can be used for refrigeration, the division of labor is clear, and the system is energy-saving. Adjust the refrigerant flow in the convection heat exchanger to control the refrigerant evaporation temperature. The principle of the dehumidification function is that the evaporation temperature of the refrigerant is slightly lower than the air dew point temperature, and the cooling capacity is saved for dehumidification, which can realize the superheated evaporation of the refrigerant in the subsequent refrigeration section, so that the cooling capacity saved by dehumidification can be used to reduce the air temperature and achieve a reasonable cooling capacity. distribution, system energy saving. The principle of the refrigeration function is that the evaporation temperature of the refrigerant floats above the dew point temperature of the air, reducing the sensible heat of the air. Since the dehumidification has been done before, the latent heat is eliminated, and the energy consumption of the cooling to eliminate the sensible heat is less at this time. Compared with the single-evaporator air conditioner that cannot reasonably distribute the cooling capacity, the independent temperature and humidity control effect of the present invention is better, and the energy efficiency is higher. The temperature and humidity are independently controlled to avoid wasting cooling capacity, the indoor climate changes mildly, and the comfort is better.

The above and other objects, advantages and features of the present invention will be more apparent to those skilled in the art from the following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

1 is a schematic structural diagram of an indoor unit of a vertical cabinet type air conditioner according to an embodiment of the present invention;

2 is a schematic cross-sectional view of a convection heat exchanger in a vertical cabinet air conditioner indoor unit according to an embodiment of the present invention;

3 is a schematic cross-sectional view of a convection heat exchanger in an indoor unit of a vertical cabinet type air conditioner according to an embodiment of the present invention;

4 is a schematic cross-sectional view of a partial structure of a convection heat exchanger in an indoor unit of a vertical cabinet type air conditioner according to an embodiment of the present invention;

5 is a schematic cross-sectional view of a partial structure of a convection heat exchanger in an indoor unit of a vertical cabinet type air conditioner according to an embodiment of the present invention;

6 is a schematic cross-sectional view of a convection heat exchanger in an indoor unit of a vertical cabinet type air conditioner according to an embodiment of the present invention;

7 is a schematic cross-sectional view of a convection heat exchanger in a vertical cabinet-type air conditioner indoor unit according to an embodiment of the present invention;

8 is a schematic cross-sectional view of a convection heat exchanger in an indoor unit of a vertical cabinet type air conditioner according to an embodiment of the present invention.

Detailed ways

FIG. 1 is a schematic structural diagram of an indoor unit of a vertical cabinet type air conditioner according to an embodiment of the present invention. As shown in FIG. 1 and referring to FIGS. 2 to 8 , an embodiment of the present invention provides a vertical cabinet type air conditioner indoor unit, which includes a casing 100 , a plurality of convection heat exchangers 200 and an air supply device 300 . The lower part of the casing 100 is provided with an air inlet 110 , and the upper part is provided with an air outlet 120 . Each convective heat exchanger 200 may include an airflow gathering part 20 and a convective heat exchange part 30 . The airflow gathering part 20 is in the shape of a cylinder with both ends open and extending in the vertical direction. Further, the outer contour of the cross section of the airflow gathering part 20 is a circle, a semicircle, a square or a fan shape. The convection heat exchange part 30 is disposed inside the airflow gathering part 20 , and is configured to generate heat or cold energy, and transfer the heat or cold energy to the air flowing through the inside of the airflow gathering part 20 . The airflow gathering part 20 is located on the outer shell surface of the convection heat exchanger 200 and can be directly used as the outer shell of the convection heat exchanger 200 . The plurality of airflow gathering parts 20 are arranged in sequence along the vertical direction and are arranged coaxially. The air blowing device 300 is disposed in the casing 100 and is configured to at least urge the air flow from the air inlet 110 to enter the inner side of the plurality of airflow gathering parts 20 in sequence, and then flow out from the air supply opening 120 after heat exchange with each convective heat exchange part 30 .

In the vertical cabinet type air conditioner indoor unit of the embodiment of the present invention, because the convection heat exchanger 200 is provided, the air flow organization of the convection heat exchanger is optimized, the overflow wind speed is increased, and the local resistance of the refrigerant pipeline such as the elbow is reduced. , to improve the heat transfer coefficient, to achieve the purpose of reducing production costs, reducing occupied space, improving the heat transfer coefficient, and promoting the improvement of air conditioning energy efficiency. Further, each airflow gathering part 20 can also gather the airflow to enhance the turbulent convection heat transfer of the convection heat exchanger. In some embodiments of the present invention, the airflow gatherer 20 is configured to absorb heat or cooling from its inner wall and transfer heat or cooling outward from its outer wall. The convection heat exchange part 30 is also configured to transfer heat or cold to the inner wall surface of the airflow gathering part 20 , so that the convection heat exchanger 200 is a radiation convection heat exchanger.

Further, in the vertical cabinet type air conditioner indoor unit of the present invention, the convection heat exchanger 200 on the lower side can be used for dehumidification, and the convection heat exchanger 200 on the upper side can be used for cooling, the division of labor is clear, and the system is energy-saving. That is to say, a plurality of convection heat exchangers 200 can be arranged in parallel or in series, preferably in parallel. At least the lowermost convection heat exchanger 200 is configured to dehumidify the airflow entering from the air inlet 110 by receiving a first preset flow of refrigerant; at least the uppermost convection heat exchanger 200 is configured to receive A second preset flow rate of refrigerant is used to cool the airflow entering from the lower side thereof. It can also be said that the indoor unit of the vertical cabinet air conditioner is configured to control the flow rate of the refrigerant entering the convection heat exchanger 200 on the lowermost side at least through the evaporation temperature of the first refrigerant, so as to dehumidify the airflow entering from the air inlet 110. . And the vertical cabinet air conditioner indoor unit is further configured to control the flow rate of the refrigerant entering the convection heat exchanger 200 on the uppermost side at least through the evaporation temperature of the second refrigerant, so as to control the airflow entering from the lower side of the convection heat exchanger 200 Cool down. Preferably, there are two convection heat exchangers 200, the convection heat exchanger 200 on the lower side is used for dehumidification, and the convection heat exchanger 200 on the upper side is used for cooling.

For example, the refrigerant flow rate in the convection heat exchanger 200 is adjusted to control the refrigerant evaporation temperature. The principle of the dehumidification function is that the evaporation temperature of the refrigerant is slightly lower than the air dew point temperature, and the cooling capacity is saved for dehumidification, which can realize the superheated evaporation of the refrigerant in the subsequent refrigeration section, so that the cooling capacity saved by dehumidification can be used to reduce the air temperature and achieve a reasonable cooling capacity. distribution, system energy saving. The principle of the refrigeration function is that the evaporation temperature of the refrigerant floats above the dew point temperature of the air, reducing the sensible heat of the air. Since the dehumidification has been done before, the latent heat is eliminated, and the energy consumption of the cooling to eliminate the sensible heat is less at this time. Compared with the single-evaporator air conditioner that cannot reasonably distribute the cooling capacity, the independent temperature and humidity control effect of the present invention is better, and the energy efficiency is higher. The temperature and humidity are independently controlled to avoid wasting cooling capacity, the indoor climate changes mildly, and the comfort is better.

In some embodiments of the present invention, as shown in FIG. 2 to FIG. 8 , the convection heat exchange part 30 includes a refrigerant pipeline and radiating fins 33 arranged on the refrigerant pipeline. Preferably, the convection heat exchange portion 30 and the airflow gathering portion 20 define a plurality of airflow channels extending along the axial direction of the airflow gathering portion 20, so as to facilitate airflow flow, significantly optimize the airflow organization of the convection heat exchanger 200, and improve the overcurrent wind speed.

In some preferred embodiments of the present invention, as shown in FIG. 2 and FIG. 3 , the refrigerant pipeline includes a plurality of heat exchange plates 31 , and each heat exchange plate 31 is provided with a plurality of heat exchange plates 31 along the length direction of the heat exchange plate 31 . Or the first refrigerant channel 32 extending in the width direction. The plurality of heat dissipation fins 33 are attached to the plurality of heat exchange plates 31 .

Further, each heat exchange plate 31 has a first edge and a second edge extending in the axial direction of the airflow gathering portion 20 . The first edge is disposed in the middle of the inner space of the airflow gathering portion 20 , and the second edge is connected to the inner wall surface of the airflow gathering portion 20 . The plurality of heat exchange plates 31 are uniformly distributed along the circumferential direction of the airflow gathering portion 20 . For example, each heat exchange plate 31 extends in the axial direction of the airflow collecting portion 20 and extends along the radial direction of the airflow collecting portion 20 , as shown in FIG. 2 . Optionally, each heat exchange plate 31 is disposed intersecting with the radial direction of the airflow gathering portion 20 toward the second edge of the heat exchange plate 31 , as shown in FIG. 3 .

In some embodiments of the present invention, a plurality of heat dissipation fins 33 arranged in sequence along the radial direction of the airflow gathering portion 20 are disposed between every two adjacent heat exchange plates 31 , and each heat dissipation fin 33 is disposed on There are one or more heat dissipation holes to form a hollow structure. Each of the first refrigerant passages 32 extends in the axial direction of the airflow collecting portion 20 . The plurality of first refrigerant passages 32 in each heat exchange plate 31 are sequentially arranged in the direction from the first edge to the second edge.

Along the radial direction of the airflow gathering portion 20, the interval between the two adjacent heat dissipation fins 33 among the plurality of heat dissipation fins 33 between each two adjacent heat exchange plates 31 has a plurality of distance values, so as to The arrangement density of the plurality of heat dissipation fins 33 is varied. For example, along the radial direction of the airflow gathering portion 20 , the values of the distances become smaller in sequence, that is, the arrangement of the heat dissipation fins 33 is first sparse and then dense.

Specifically, the plurality of heat dissipation fins 33 between every two adjacent heat exchange plates 31 are arranged into multiple groups, each group of heat dissipation fins 33 has at least two heat dissipation fins 33 , and each group of heat dissipation fins 33 has at least two heat dissipation fins 33 . The distance between every two adjacent heat-dissipating fins 33 is equal to one of the above-mentioned distance values, so that the interval between the heat-dissipating fins 33 between every two adjacent heat-exchange plates 31 has multiple distance values. Groups can share one heat dissipation fin 33 , that is, use one common heat dissipation fin 33 for grouping.

In each heat exchange plate 31, in the direction from the first edge to the second edge, a plurality of first refrigerant passages 32 are arranged in sequence, and the interval between two adjacent first refrigerant passages 32 has one or more spacing values . Multiple spacing values decrease in turn. The plurality of first refrigerant passages 32 on each heat exchange plate 31 are arranged in multiple groups, each group of first refrigerant passages 32 has at least two first refrigerant passages 32 , and every two phases in each group of first refrigerant passages 32 The distance between the adjacent first refrigerant passages 32 is equal to the above-mentioned spacing value, so that the interval between the first refrigerant passages 32 on each heat exchange plate 31 has multiple spacing values, and the adjacent two groups can share one first refrigerant. The channels 32 are grouped by using a common first refrigerant channel 32 .

In the direction from the first edge to the second edge, the ratio between the number of the first refrigerant channels 32 and the number of the heat dissipation fins 33 is 4/5 to 10/1, preferably 1/1 to 10/1. Each of the heat dissipation fins 33 has an arc shape that is arched toward the outside of the airflow gathering portion 20 . The cross-sectional profile of each first refrigerant passage 32 is rectangular or circular or other regular or irregular shapes. The hydraulic radius of each first refrigerant passage 32 is 0.1-10 mm; the number of the first refrigerant passages 32 on each heat exchange plate 31 is 10-50. The number of heat exchange plates 31 is 4 to 50. In some embodiments of the present invention, in the direction from the first edge to the second edge, the distance between two adjacent first refrigerant passages 32 is one, that is, the plurality of first refrigerant passages 32 are arranged at equal intervals. The distance between two adjacent heat dissipation fins 33 among the plurality of heat dissipation fins 33 between every two adjacent heat exchange plates 31 is one, that is, the distance between every two adjacent heat exchange plates 31 is one. The heat dissipation fins 33 are arranged at equal intervals.

In some optional embodiments of the present invention, as shown in FIG. 4 , each heat dissipation fin 33 may be a flat-plate heat dissipation fin 34 . Both sides of each heat exchange plate 31 are provided with the above-mentioned flat-plate heat dissipation fins 34 arranged in sequence from the corresponding first edge to the direction of the second edge. Each heat dissipation fin 33 is perpendicular to the corresponding heat exchange plate 31 . In other optional embodiments of the present invention, as shown in FIG. 5 , each heat dissipation fin 33 may be a pin-shaped heat dissipation fin 35, and two sides of each heat exchange plate 31 are provided with a plurality of The needle-shaped heat dissipation fins 35 of the heat exchange plate 31 are provided. In some optional embodiments of the present invention, other types of heat dissipation fins, such as tree-shaped heat dissipation fins, irregular heat dissipation fins, etc., may also be provided on both sides of each heat exchange plate 31 . Further, the heat exchange plate 31 is preferably integrally formed with the heat dissipation fins 33 .

In some optional embodiments of the present invention, as shown in FIG. 6 , the heat dissipation fins on one side of each heat exchange plate 31 are first heat dissipation fins and constitute a first fin group; the heat dissipation fins on the other side are the first heat dissipation fins. The fins are second heat dissipation fins and constitute a second fin group. , in the first fin group and the second fin group between two adjacent heat exchange plates 31 : at least part of the first heat dissipation fins in the extended surface of each first heat dissipation fin along its width direction pass through a gap between the ends of two adjacent second heat dissipation fins so that the first heat dissipation fin faces the gap between the ends of two adjacent second heat dissipation fins; and at least part of the second heat dissipation fin The extension surface of each second heat dissipation fin in the width direction of the fins passes through the gap between the ends of two adjacent first heat dissipation fins, so that the second heat dissipation fin faces two adjacent heat dissipation fins. the gap between the ends of the first cooling fins. In this way, the relative positions of the cooling fins and the gaps of the cooling fins can be arranged in a staggered manner, and the cooling fins on the adjacent side are aligned with the gaps between the cooling fins on the other adjacent side, so as to increase the disturbance of the overcurrent air without blocking the flow of air. The effect of enhancing the convective heat transfer coefficient of the flow air passage.

Optionally, each of the first heat dissipation fins and each of the second heat dissipation fins extends from the corresponding heat exchange plate 31 to a corresponding side of the heat exchange plate 31 and to the radially outer side of the convection heat exchange portion 30 . Preferably, the plurality of first heat dissipation fins on one side of each heat exchange plate 31 and the plurality of second heat dissipation fins on the other side of the heat exchange plate 31 are symmetrically arranged with respect to the heat exchange plate 31 . Further, there is an interval between the first fin group and the second fin group located between two adjacent heat exchange plates 31, that is, the first fin group and the second fin group are located in corresponding two The two sides of the angle bisector between adjacent heat exchange plates 31 may also be symmetrically arranged with respect to the angle bisector.

In some embodiments of the present invention, as shown in FIG. 6 , each of the first refrigerant passages 32 extends along the axial direction of the convection heat exchange portion 30 ; and the cross-sectional profile of each first refrigerant passage 32 may include a first A rectangular frame and a plurality of second rectangular frames. The first rectangular frame extends in a direction from the respective first edge to the second edge. A plurality of second rectangular frames are arranged on both sides of the first rectangular frame and communicate with the inner space of the first rectangular frame. In this way, the cross-sectional profile of each first refrigerant passage 32 can be approximately in the shape of "earth", "ten", "±", "dry", "king", etc., or a combination of these shapes.

In other preferred embodiments of the present invention, as shown in FIG. 7 and FIG. 8 , the refrigerant pipeline includes a plurality of cylindrical structures arranged coaxially, and each cylindrical structure is arranged coaxially with the airflow gathering portion 20 . The cylindrical structure includes at least one heat exchange cylinder 36 , and a plurality of second refrigerant channels 37 are provided in the cylinder wall of each heat exchange cylinder 36 . The number of heat dissipation fins 33 is plural. At least the outer side of the innermost tubular structure has a plurality of heat dissipation fins 33 . For example, the outer side of the innermost tubular structure may have a plurality of cooling fins 33 , and optionally, the inner side of the innermost tubular structure may also have a plurality of cooling fins 33 . The inner side of the outermost tubular structure is provided with a plurality of heat dissipation fins 33; The wall surface and the inner wall surface of the airflow gathering portion 20 are integrally formed or in contact with each other.

Further, there are a plurality of cylindrical structures, a fin layer is disposed between every two adjacent cylindrical structures, and each fin layer has a plurality of the above-mentioned heat dissipation fins 33 . Preferably, the plurality of radiating fins 33 of each fin layer are uniformly distributed along the circumferential direction of the airflow gathering portion 20 ; and each radiating fin 33 extends along the axial direction of the airflow gathering portion 20 to A plurality of airflow channels are defined. Each heat dissipation fin 33 may be provided with one or more heat dissipation holes. When the outer side of the outermost tubular structure is thermally connected to the inner wall of the airflow gathering portion 20 through a plurality of heat dissipation fins 33 , that is, the outer side of the outermost tubular structure is thermally connected to the inner wall of the airflow gathering portion 20 through a fin layer. In some alternative embodiments, the heat dissipation fins 33 are flat-plate heat dissipation fins or needle-shaped heat dissipation fins.

Each of the second refrigerant passages 37 extends in the axial direction of the airflow collecting portion 20 . The plurality of second refrigerant passages 37 in the cylindrical wall of each heat exchange cylinder 36 are sequentially arranged along the circumferential direction of the heat exchange cylinder 36 . The cross-sections of the plurality of second refrigerant passages 37 in the cylinder wall of each heat exchange cylinder 36 may include circles and polygons, and the polygons may be approximately rectangular structures. The circumferential directions of the heat cylinders 36 are alternately arranged in sequence.

In some embodiments of the present invention, the cylindrical structure further includes at least one supporting cylinder, each supporting cylinder is disposed between two adjacent heat exchange cylinders 36 , or is disposed on the inner side of the innermost heat exchange cylinder 36 , or It is arranged between the outermost heat exchange cylinder 36 and the airflow gathering part 20 . Further, the heat dissipation fins 33 may be integrally formed with the corresponding cylindrical structures on the inner side, and the outer side may be in contact with the corresponding cylindrical structures on the outer side.

In some embodiments of the present invention, in every two adjacent heat exchange drums 36 , the cross-sectional area of each second refrigerant passage 37 on the outer heat exchange drum 36 is larger than that on the inner heat exchange drum 36 . The area of the cross section of the corresponding second refrigerant passage 37 . For example, the height of each second refrigerant passage 37 on the outer heat exchange cylinder 36 along the radial direction of the airflow gathering portion 20 is greater than that of each second refrigerant passage 37 on the inner heat exchange cylinder 36 along the airflow gathering portion 20 The height that extends in the radial direction.

In every two adjacent fin layers, the height of the outer fins 33 extending in the radial direction of the airflow gathering portion 20 is greater than the height of the inner fins 33 extending along the radial direction of the airflow gathering portion 20 . The wall thickness of each radiating fin 33 is 0.2-1 mm, and the distance between every two adjacent radiating fins 33 in each fin layer is 0.5-10 mm. The hydraulic radius of each second refrigerant passage 37 is 0.6-10 mm.

In some embodiments of the present invention, the convection heat exchange portion 30 defines a central channel 38 extending along the axial direction of the airflow gathering portion 20 and located in the center of the space inside the airflow gathering portion 20 . The central channel 38 may be configured to circulate air or refrigerant. In other embodiments, both ends of the central channel 38 are provided with closed structures, and the central channel 38 can also be configured to be provided with fittings such as a shunt pipe. Each of the first refrigerant channel 32/second refrigerant channel 37 is preferably a microchannel tube. The heat exchange plate 31 , the heat exchange cylinder 36 , and the airflow gathering portion 20 can all be made of copper material or aluminum material.

In some embodiments of the present invention, in order to facilitate processing and manufacturing, the convection heat exchange part 30 is formed by an extrusion process, that is, the convection heat exchange part 30 is preferably an integral piece. Or, the whole formed by the convection heat exchange part 30 and the airflow gathering part 20 is formed by extrusion process. That is to say, the whole formed by the convection heat exchange part 30 and the airflow gathering part 20 is an integral piece. The heat dissipation fins 33 are in direct communication with the walls of the first refrigerant passage 32/the second refrigerant passage 37 and belong to the same component. There is no problem of contact thermal resistance between the two, which can significantly reduce the heat transfer between the refrigerant and the air. resistance and increase the heat transfer performance.

In some embodiments of the present invention, the refrigerant pipeline also has a main inlet pipe and a main outlet pipe; one end of each first refrigerant passage 32/second refrigerant passage 37 communicates with the main inlet pipe, and the other end communicates with the main outlet pipe , so that a plurality of first refrigerant passages 32 / second refrigerant passages 37 are connected in parallel. Further, the end portion of each heat exchange plate 31 or heat exchange cylinder 36 may be provided with a collector inlet pipe or a collector outlet pipe, and it is arranged opposite to the heat exchange plate 31 or the heat exchange cylinder 36 so as not to hinder the convective heat exchange portion 30 The flow of airflow within. That is, at both ends of each heat exchange plate 31 or heat exchange cylinder 36, there are refrigerant branching tube bundles and collecting tube bundles, which are arranged according to the refrigerant circulation positions of the pipe cross-sections to guide the refrigerant flow. The position of the air runner is thus reserved to ensure a smooth forced flow of air.

In other embodiments of the present invention, the convection heat exchanger 200 may have at least one parallel unit, each parallel unit having a plurality of channel groups. Each channel group has at least one first refrigerant channel 32/second refrigerant channel 37; the plurality of channel groups in each parallel unit are arranged in series in sequence. When there are multiple parallel units, the multiple parallel units are connected in parallel. Each channel group may have one heat exchange plate 31 as described above. For example, the number of heat exchange plates 31 is 20, wherein every 5 heat exchange plates 31 constitute 5 channel groups, which are arranged in series in sequence, that is, every 5 heat exchange plates 31 constitute a parallel unit, that is, a total of 4 parallel units , the four parallel units are connected in parallel with each other. Further, the end portion of each heat exchange plate 31 or heat exchange cylinder 36 may be provided with a collector inlet pipe or a collector outlet pipe, which is arranged opposite to the heat exchange plate 31 or the heat exchange cylinder 36 and will not hinder the convection heat exchange portion. 30 the flow of air flow, and it is convenient for the reasonable layout of the pipeline.

In some embodiments of the present invention, the vertical cabinet type air conditioner indoor unit further includes a water receiving tray 400 disposed on the lower side of the convection heat exchanger 200 . The position of the air inlet 110 is higher than the water receiving tray 400 and lower than the airflow gathering part.

In some embodiments of the present invention, the air supply device 300 includes one or more first fans 310 , and each first fan 310 is disposed between two adjacent airflow gathering parts 20 . For example, there may be two airflow gathering parts 20, and the first fan 310 is an axial flow fan, which is arranged between the two airflow gathering parts 20 to promote the airflow from the inner side of the lower airflow gathering part 30 to the upper airflow gathering part 30 inside flow. Further, the air supply device 300 further includes a second fan 320 , which is disposed on the upper side of the uppermost airflow gathering portion 20 . The second fan may be a centrifugal fan.

By now, those skilled in the art will recognize that, although various exemplary embodiments of the present invention have been illustrated and described in detail herein, the present invention may still be implemented in accordance with the present disclosure without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. a vertical cabinet type air conditioner indoor unit, is characterized in that, comprises: a casing, the lower part of the casing is provided with an air inlet, and the upper part is provided with an air outlet; A plurality of convective heat exchangers, each of which has an airflow gathering part and a convection heat exchange part, and is arranged in the casing; and the airflow gathering part is open at both ends and along the vertical direction an extended cylindrical shape; the convection heat exchange part is arranged on the inner side of the airflow gathering part, and is configured to generate heat or cold energy, and transfer the heat or cold energy to the air flowing through the inside of the airflow gathering part; a plurality of the airflow gathering parts are arranged in sequence along the vertical direction, and a plurality of the airflow gathering parts are arranged coaxially; and The air supply device is arranged in the casing, and is configured to at least urge air flow from the air inlet to enter the inner side of the plurality of air flow gathering parts in sequence, and after heat exchange with each of the convective heat exchange parts, the air supply is sent from the air supply port. Outflow. 2. The vertical cabinet type air conditioner indoor unit according to claim 1 is characterized in that, it is configured as: controlling the flow rate of the refrigerant entering the convection heat exchanger on the lowermost side at least according to the evaporation temperature of the first refrigerant, so as to dehumidify the air flow entering from the air inlet; The flow rate of the refrigerant entering the uppermost convection heat exchanger is controlled according to at least the evaporating temperature of the second refrigerant, so as to cool the airflow entering from the lower side of the convection heat exchanger. 3. The vertical cabinet-type air conditioner indoor unit according to claim 1, further comprising: The water receiving tray is arranged on the lower side of the convection heat exchanger on the lowermost side; the position of the air inlet is higher than the water receiving tray and lower than the airflow gathering part on the lowermost side. 4. The vertical cabinet type air conditioner indoor unit according to claim 1, characterized in that, The air supply device includes one or more first fans, and each of the first fans is arranged between two adjacent airflow gathering parts. 5. The vertical cabinet type air conditioner indoor unit according to claim 4, characterized in that, The air supply device further includes a second fan, which is arranged on the upper side of the uppermost airflow gathering portion. 6. The vertical cabinet type air conditioner indoor unit according to claim 5, characterized in that, Each of the first fans is an axial flow fan, and each of the second fans is a centrifugal fan. 7. The vertical cabinet type air conditioner indoor unit according to claim 1, characterized in that, Each of the convective heat exchange portion and the corresponding airflow gathering portion defines a plurality of airflow channels extending in the axial direction of the airflow gathering portion. 8. The vertical cabinet type air conditioner indoor unit according to claim 1, characterized in that, Each of the convective heat exchange parts includes a refrigerant pipeline and heat dissipation fins disposed on the refrigerant pipeline. 9. The vertical cabinet type air conditioner indoor unit according to claim 8, characterized in that, The refrigerant pipeline includes a plurality of heat exchange plates, each of which has a first edge and a second edge extending along the axial direction of the airflow gathering portion; the first edge is provided on the airflow In the middle of the inner space of the gathering portion, the second edge is connected to the inner wall surface of the airflow gathering portion; each of the heat exchange plates is provided with a plurality of first refrigerant passages; or, The refrigerant pipeline includes one or more cylindrical structures arranged coaxially, and each of the cylindrical structures is arranged coaxially with the airflow gathering portion; the cylindrical structure includes at least one heat exchange cylinder, each of which is One or more second refrigerant passages are arranged on the cylinder wall of the heat exchange cylinder. 10. The vertical cabinet type air conditioner indoor unit according to claim 1, wherein, Each of the convective heat exchange parts is an integral piece and is formed by an extrusion process; or, Each of the convective heat exchange portion and the corresponding airflow gathering portion is formed as an integral integral piece, and is formed by an extrusion process.

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