CN111435010A - Indoor unit of vertical cabinet type air conditioner - Google Patents

Abstract

The invention provides a vertical cabinet type air conditioner indoor unit. The method comprises the following steps: the air conditioner comprises a shell, wherein the lower part of the shell is provided with an air inlet, the upper part of the shell is provided with an air supply outlet, and the front part of the shell comprises a radiation plate; a plurality of radiation convection type heat exchangers having a radiation heat exchanging part and a convection heat exchanging part and disposed in the case; the radiation heat exchange part is in a cylindrical shape with openings at two ends and extends along the vertical direction, is configured to absorb heat or cold from the inner wall surface of the radiation heat exchange part and transmit the heat or cold to the radiation plate from the outer wall surface of the radiation heat exchange part; the convection heat exchange part is arranged at the inner side of the radiation heat exchange part, is configured to generate heat or cold, and transmits the heat or cold to air flowing through the inner side of the radiation heat exchange part and transmits the heat or cold to the inner wall surface of the radiation heat exchange part; the plurality of radiation heat exchange parts are sequentially and coaxially arranged along the vertical direction; and the air supply device is arranged in the shell and is configured to at least promote airflow to enter the inner side of the radiation heat exchange part from the air inlet, and the airflow flows out from the air supply outlet after exchanging heat with the convection heat exchange part.

Description

Indoor unit of vertical cabinet type air conditioner

Technical Field

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

Background

In recent years, with the improvement of the quality of life of people, more and more attention is paid to the thermal comfort of the indoor environment, and the building energy consumption, especially the cooling and heating energy consumption is also more and more large, so that the cooling and heating device with high efficiency, energy conservation and good thermal comfort is one of the research hotspots in the heating and ventilation industry. In the existing air-conditioning indoor unit, a finned tube evaporator is usually adopted, the finned tube evaporator has large volume and high cost, the convection heat transfer coefficient of the air flow drawn by a fan is small, the air flow organization is poor, the production flow is complicated, and the heat exchange performance of the existing finned tube evaporator also has a space for improvement. In addition, the single-evaporator air conditioner cannot reasonably distribute refrigerating capacity, can only eliminate sensible heat or latent heat independently, has high energy consumption, rapid indoor climate change and poor comfort and is easy to dry. The appearance of high energy consumption is rapid indoor climate change and waste of refrigerating capacity.

Disclosure of Invention

The invention aims to overcome at least one defect of the existing indoor unit of the air conditioner and provides a vertical cabinet type indoor unit of the air conditioner.

Specifically, the invention provides a vertical cabinet type air conditioner indoor unit, which comprises:

the heat or cold absorption type air conditioner comprises a shell, wherein an air inlet is formed in the lower part of the shell, an air supply outlet is formed in the upper part of the shell, the front part of the shell comprises a radiation plate, and the radiation plate absorbs heat or cold from the rear side of the radiation plate and radiates the heat or cold from the front side of the radiation plate to the outside;

a plurality of radiant-convection heat exchangers, each having a radiant heat exchanging portion and a convection heat exchanging portion, and disposed within the housing; the radiation heat exchange part is in a cylindrical shape with openings at two ends and extends along the vertical direction, is configured to absorb heat or cold from the inner wall surface of the radiation heat exchange part and transfer the heat or cold to the radiation plate from the outer wall surface of the radiation heat exchange part; the convection heat exchange part is arranged on the inner side of the radiation heat exchange part, is configured to generate heat or cold, and transmits the heat or cold to air flowing through the inner side of the radiation heat exchange part and transmits the heat or cold to the inner wall surface of the radiation heat exchange part; the plurality of radiation heat exchange parts are sequentially arranged along the vertical direction and are coaxially arranged; and

and the air supply device is arranged in the shell and is configured to at least cause airflow to sequentially enter the inner side of each radiation heat exchange part from the air inlet and flow out of the air supply outlet after the airflow exchanges heat with each convection heat exchange part.

Optionally, each of the radiant heat exchanging parts is disposed at a distance from the radiant plate, so that each of the radiant heat exchanging parts radiates heat or cold from the outer wall surface thereof to the radiant plate; or the like, or, alternatively,

each radiation heat exchange part is arranged in contact with all the rear side surfaces of the radiation plates, which are positioned at the front side of the radiation heat exchange part; or the like, or, alternatively,

each radiation heat exchange part is arranged in contact with the rear side surface of the part of the radiation plate, which is positioned at the front side of the radiation heat exchange part, and is arranged at an interval with the rear side surface of the rest part of the radiation plate, which is positioned at the front side of the radiation heat exchange part.

Optionally, the indoor unit of the cabinet air conditioner further comprises a water pan disposed at the lower side of the radiation convection type heat exchanger at the lowest side; the position of the air inlet is higher than the water receiving tray and lower than the radiation heat exchange part at the lowest side.

Optionally, the air supply device includes one or more first fans, and each first fan is disposed between two adjacent radiation heat exchange portions.

Optionally, the air supply device further includes a second fan disposed on an upper side of the uppermost radiation heat exchanging portion.

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

Optionally, each of the convection heat exchange portions and the corresponding radiant heat exchange portion define a plurality of air flow passages extending in an axial direction of the radiant heat exchange portion.

Optionally, each of the heat convection portions 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, each of the heat exchange plates has a first edge and a second edge extending along an axial direction of the radiant heat exchanging portion; the first edge is arranged in the middle of the space inside the radiation heat exchange part, and the second edge is connected to the inner wall surface of the radiation heat exchange part; a plurality of first refrigerant channels are arranged in each heat exchange plate; or the like, or, alternatively,

the refrigerant pipeline comprises one or more coaxially arranged cylindrical structures, and each cylindrical structure is coaxially arranged with the radiation heat exchange part; the cylindrical structure comprises at least one heat exchange cylinder, and one or more second refrigerant channels are arranged on the wall of each heat exchange cylinder.

Optionally, each convection heat exchange part is an integrated workpiece and is formed by adopting an extrusion process; or the like, or, alternatively,

the whole formed by each convection heat exchange part and the corresponding radiation heat exchange part is an integrated workpiece and is formed by adopting an extrusion process.

The indoor unit of the vertical cabinet type air conditioner is provided with the radiation convection type heat exchanger and the radiation plate, so that the airflow structure of the radiation convection type heat exchanger is optimized, the overflowing air speed is improved, the local resistance of a refrigerant pipeline such as an elbow is reduced, the heat exchange coefficient is improved, the purposes of reducing the production cost, reducing the occupied space and improving the heat exchange coefficient are realized, and the improvement of the air conditioning energy efficiency is promoted. The radiation plate can radiate cold energy to the indoor by utilizing the low temperature of the environment in the shell, fully utilizes the low temperature surplus of the indoor unit body of the vertical cabinet type air conditioner, and improves the utilization rate of the cold energy. Further, production processes are reduced, such as integrated extrusion and integrated molding of the radiation convection type heat exchanger.

Furthermore, in the indoor unit of the vertical cabinet type air conditioner, the radiation convection type heat exchanger on the lower side can be used for dehumidification, and the radiation convection type heat exchanger on the upper side can be used for refrigeration, so that the labor division is clear, and the system is energy-saving. And regulating the flow of the refrigerant in the radiation convection type heat exchanger, and controlling the evaporation temperature of the refrigerant. The principle of the dehumidification function is that the evaporation temperature of the refrigerant is slightly lower than the dew point temperature of air, the refrigerating capacity is saved for dehumidification, the refrigerant of a subsequent refrigerating section can be superheated and evaporated, the refrigerating capacity saved by dehumidification is used for reducing the air temperature, the reasonable distribution of the refrigerating capacity is achieved, and the system is 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, and the sensible heat of the air is reduced. Since the dehumidification has been done before, the latent heat is eliminated, and the refrigeration consumes less energy to remove sensible heat at this time. Compared with a single-evaporator air conditioner which cannot reasonably distribute the refrigerating capacity, the air conditioner has the advantages of better independent temperature and humidity control effect and higher energy efficiency. The temperature and humidity are independently controlled, the refrigerating capacity is prevented from being wasted, the indoor climate change is mild, and the comfort is good.

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

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic structural view of a cabinet air-conditioning indoor unit according to an embodiment of the present invention;

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

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

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

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

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

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

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

Detailed Description

Fig. 1 is a schematic structural view of a cabinet air-conditioning indoor unit according to an embodiment of the present invention. As shown in fig. 1 and referring to fig. 2 to 8, an embodiment of the present invention provides a cabinet air conditioner indoor unit, which includes a casing 100, a plurality of radiant-convection heat exchangers 200, and a blower 300. The lower portion of the housing 100 is provided with an air inlet 110, and the upper portion thereof is provided with an air outlet 120. And the front of the case 100 includes a radiation plate 130, and the radiation plate 130 absorbs heat or cold from the rear side thereof and radiates the heat or cold outward from the front side thereof. Each radiant-convective heat exchanger 200 may include a radiant heat exchange portion 20 and a convective heat exchange portion 30. The radiant heat exchanging portion 20 has a cylindrical shape with both ends open and extends in the vertical direction, and is arranged to absorb heat or cold from the inner wall surface thereof and transmit the heat or cold from the outer wall surface thereof to the radiation plate 130. Further, the outer contour of the cross section of the radiant heat exchanging part 20 is circular, semicircular, square or fan-shaped. The convection heat exchanging part 30 is disposed inside the radiant heat exchanging part 20, and is configured to generate heat or cold, and to transfer the heat or cold to air flowing through the inside of the radiant heat exchanging part 20 and to transfer the heat or cold to an inner wall surface of the radiant heat exchanging part 20. The radiant heat exchanging part 20 is located on the outer surface of the radiant convection heat exchanger 200, and can be directly used as the outer shell of the radiant convection heat exchanger 200. The plurality of radiant heat exchanging portions 20 are sequentially disposed in a vertical direction and coaxially disposed. The air blowing device 300 is disposed in the casing 100, and configured to at least cause the airflow to enter the plurality of radiant heat exchanging portions 20 from the air inlet 110 in sequence, to exchange heat with each of the convection heat exchanging portions 30, and to flow out from the air blowing port 120.

In the indoor unit of the vertical cabinet type air conditioner, the radiation convection type heat exchanger 200 and the radiation plate 130 are arranged, so that the airflow organization of the radiation convection type heat exchanger is optimized, the overflowing air speed is improved, the local resistance of a refrigerant pipeline such as an elbow is reduced, the heat exchange coefficient is improved, the aims of reducing the production cost, reducing the occupied space and improving the heat exchange coefficient are fulfilled, and the improvement of the air conditioning energy efficiency is promoted. The radiation plate 130 can radiate cold to the indoor by using the low temperature of the environment in the shell 100, and the low temperature surplus of the indoor unit body of the vertical cabinet air conditioner is fully utilized, so that the utilization rate of the cold is improved. However, the conventional air conditioner cannot supply cold to the room by using the low ambient temperature in the machine. Namely, the radiation plate 130 radiates the cold energy to the indoor by using the low temperature of the environment in the indoor unit of the vertical cabinet air conditioner, and the low temperature surplus of the indoor unit body of the vertical cabinet air conditioner is fully used, so that the utilization rate of the cold energy is improved.

Furthermore, each radiation heat exchange part 20 can gather air flow to enhance disturbance convection heat exchange of the radiation convection type heat exchanger; and the radiation area can be increased, so that the cold environment cold source is integrally formed in the vertical cabinet type air conditioner indoor unit, and the radiation plate 130 is used as a radiation directional radiation cold source in the vertical cabinet type air conditioner indoor unit. The radiation plate 130 can be made of aluminum alloy, the radiation heat exchange coefficient is high, the orientation of the radiation plate 130 is the same as that of the air supply outlet 120, and user experience is facilitated.

Furthermore, in the indoor unit of the vertical cabinet air conditioner, the radiation convection type heat exchanger 200 at the lower side can be used for dehumidification, and the radiation convection type heat exchanger 200 at the upper part can be used for refrigeration, so that the division of labor is clear, and the system is energy-saving. That is, the plurality of radiant convective heat exchangers 200 may be arranged in parallel or in series, preferably in parallel. At least the lowermost radiant convective heat exchanger 200 is configured to dehumidify the air stream entering from the air intake 110 by receiving a first preset flow of refrigerant; at least the uppermost radiant convective heat exchanger 200 is configured to cool the air stream entering from its underside by receiving a second preset flow of refrigerant. It can also be said that the indoor unit of a cabinet air conditioner is configured to control the flow of refrigerant into the lowermost radiant convection heat exchanger 200 by at least the first refrigerant evaporating temperature to dehumidify the airflow entering from the air inlet 110. And the cabinet air conditioning indoor unit is further configured to control the flow of refrigerant into the uppermost radiant convection heat exchanger 200 at least by the second refrigerant evaporating temperature to cool the air flow entering from the lower side of the radiant convection heat exchanger 200. Preferably, the radiation convection type heat exchanger 200 is two, the lower radiation convection type heat exchanger 200 is used for dehumidification, and the upper radiation convection type heat exchanger 200 is used for refrigeration.

For example, the refrigerant flow in the radiant convective 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 dew point temperature of air, the refrigerating capacity is saved for dehumidification, the refrigerant of a subsequent refrigerating section can be superheated and evaporated, the refrigerating capacity saved by dehumidification is used for reducing the air temperature, the reasonable distribution of the refrigerating capacity is achieved, and the system is 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, and the sensible heat of the air is reduced. Since the dehumidification has been done before, the latent heat is eliminated, and the refrigeration consumes less energy to remove sensible heat at this time. Compared with a single-evaporator air conditioner which cannot reasonably distribute the refrigerating capacity, the air conditioner has the advantages of better independent temperature and humidity control effect and higher energy efficiency. The temperature and humidity are independently controlled, the refrigerating capacity is prevented from being wasted, the indoor climate change is mild, and the comfort is good.

In some embodiments of the present invention, as shown in fig. 2 to 8, the convective heat transfer part 30 includes a refrigerant pipeline and a heat dissipation fin 33 disposed on the refrigerant pipeline. Preferably, the convection heat exchanger 30 and the radiant heat exchanger 20 define a plurality of airflow channels extending along the axial direction of the radiant heat exchanger 20, so as to facilitate airflow, significantly optimize the airflow structure of the radiant convection heat exchanger 200, and increase the overflowing wind speed.

In some preferred embodiments of the present invention, as shown in fig. 2 and 3, the refrigerant pipeline includes a plurality of heat exchange plates 31, and a plurality of first refrigerant channels 32 extending along a length direction or a width direction of the heat exchange plates 31 are disposed in each of the heat exchange plates 31. A plurality of heat radiation 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 an axial direction of the radiant heat exchanging part 20. The first edge is disposed in the middle of the space inside the radiant heat exchanging part 20, and the second edge is connected to the inner wall surface of the radiant heat exchanging part 20. The plurality of heat exchange plates 31 are uniformly distributed in the circumferential direction of the radiant heat exchanging part 20. For example, each heat exchange plate 31 extends in an axial direction of the radiant heat exchanging part 20, and extends in a radial direction of the radiant heat exchanging part 20, as shown in fig. 2. Alternatively, each heat exchange plate 31 is arranged crosswise to the radial direction of the radiant heat exchanging part 20 towards 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 are sequentially disposed between every two adjacent heat exchange plates 31 along a radial direction of the radiant heat exchange portion 20, and each heat dissipation fin 33 is provided with 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 radiant heat exchanging part 20. The plurality of first refrigerant channels 32 in each heat exchange plate 31 are sequentially arranged from the first edge to the second edge.

The interval between two adjacent heat dissipation fins 33 among the plurality of heat dissipation fins 33 between every two adjacent heat exchange plates 31 has a plurality of distance values in the radial direction of the radiant heat exchanging portion 20 so that the arrangement density of the plurality of heat dissipation fins 33 is not equal. The plurality of distance values become smaller in order, i.e., the heat radiating fins 33 are arranged first to be sparse and then to be dense, as in the radial direction of the radiant heat exchanging portion 20.

Specifically, the plurality of heat dissipating fins 33 between every two adjacent heat exchange plates 31 are arranged in multiple groups, each group of heat dissipating fins 33 has at least two heat dissipating fins 33, the distance between every two adjacent heat dissipating fins 33 in each group of heat dissipating fins 33 is equal to the above distance value, so that the size of the interval between the heat dissipating fins 33 between every two adjacent heat exchange plates 31 has multiple distance values, and two adjacent groups can share one heat dissipating fin 33, that is, one shared heat dissipating fin 33 is used for grouping.

In each heat exchange plate 31, the first edge points to the second edge, the plurality of first refrigerant channels 32 are sequentially arranged, and the interval between two adjacent first refrigerant channels 32 has one or more spacing values. The plurality of pitch values become smaller in turn. The plurality of first refrigerant channels 32 on each heat exchange plate 31 are arranged into a plurality of groups, each group of first refrigerant channels 32 has at least two first refrigerant channels 32, the distance between every two adjacent first refrigerant channels 32 in each group of first refrigerant channels 32 is equal to one of the above-mentioned distance values, so that the distance between the first refrigerant channels 32 on each heat exchange plate 31 has a plurality of distance values, and two adjacent groups can share one first refrigerant channel 32, that is, one shared first refrigerant channel 32 is used for grouping.

The ratio of the number of the first refrigerant channels 32 to the number of the heat dissipating fins 33 is 4/5 to 10/1, preferably 1/1 to 10/1, from the first edge to the second edge. Each of the heat radiating fins 33 has an arc shape that is arched toward the outside of the radiant heat exchanging portion 20. The cross-sectional profile of each first refrigerant channel 32 is rectangular or circular or other regular or irregular shape. The hydraulic radius of each first refrigerant channel 32 is 0.1-10 mm; the number of the first refrigerant channels 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, the distance between two adjacent first refrigerant channels 32 is one from the first edge to the second edge, that is, the plurality of first refrigerant channels 32 are arranged at equal intervals. The distance between two adjacent heat dissipation fins 33 of the plurality of heat dissipation fins 33 between each two adjacent heat exchange plates 31 is one, that is, the plurality of heat dissipation fins 33 between each two adjacent heat exchange plates 31 are arranged at equal intervals.

In some alternative embodiments of the present invention, as shown in fig. 4, each of the heat dissipating fins 33 may be a flat plate-like heat dissipating fin 34. The above-mentioned flat plate-like heat radiating fins 34 are provided on both sides of each heat exchange plate 31 in order from the corresponding first edge toward the second edge. Each of the heat dissipation fins 33 is perpendicular to the corresponding heat exchange plate 31. In other alternative embodiments of the present invention, as shown in fig. 5, each heat dissipating fin 33 may be a pin-shaped heat dissipating fin 35, and a plurality of pin-shaped heat dissipating fins 35 perpendicular to each heat exchanging plate 31 are disposed on both sides of each heat exchanging plate 31. In some alternative embodiments of the present invention, other types of heat dissipation fins, such as tree-shaped heat dissipation fins, irregular heat dissipation fins, etc., may be disposed on both sides of each heat exchange plate 31. Further, the heat exchange plate 31 is preferably integrally formed with the heat radiating fins 33.

In some alternative embodiments of the present invention, as shown in fig. 6, the heat dissipation fin on one side of each heat exchange plate 31 is a first heat dissipation fin and constitutes a first fin group; the radiating fins on the other side are second radiating fins and form 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 extension surface of each first radiating fin in the width direction of the first radiating fin penetrates through the gap between the tail ends of two adjacent second radiating fins, so that the first radiating fin faces the gap between the tail ends of the two adjacent second radiating fins; and at least part of extension surfaces of each second radiating fin in the width direction of the second radiating fin penetrate through the gap between the tail ends of two adjacent first radiating fins, so that the second radiating fins face the gap between the tail ends of the two adjacent first radiating fins. The arrangement can lead the relative positions of the radiating fins and the gaps of the radiating fins to be staggered, and the radiating fin on one adjacent side is aligned with the gap of the radiating fin on the other adjacent side, thereby achieving the effects of increasing the disturbance of the overflowed air and not blocking the convection heat transfer coefficient of the overflowed air passage.

Alternatively, each of the first heat dissipation fins and each of the second heat dissipation fins extend from the corresponding heat exchange plate 31 toward the corresponding side of the heat exchange plate 31 and radially outward of the convective heat transfer part 30. Preferably, a plurality of first heat dissipation fins of one side of each heat exchange plate 31 and a plurality of second heat dissipation fins of the other side of the heat exchange plate 31 are symmetrically arranged with respect to the heat exchange plate 31. Further, a space is provided between the first fin group and the second fin group between two adjacent heat exchange plates 31, that is, the first fin group and the second fin group are located on two sides of an angular bisector between two adjacent heat exchange plates 31, and may also be symmetrically arranged about the angular bisector.

In some embodiments of the present invention, as shown in fig. 6, each of the first cooling medium channels 32 extends along an axial direction of the convection heat exchanging part 30; and the cross-sectional profile of each first refrigerant channel 32 may include a first rectangular frame and a plurality of second rectangular frames. The first rectangular frame extends in a direction pointing from the respective first edge to the second edge. And the second rectangular frames are arranged on two sides of the first rectangular frame and are communicated with the inner space of the first rectangular frame. The cross-sectional profile of each first refrigerant channel 32 can be similar to the shapes of earth, ten, cross, dry, king and the like, or the combination of the shapes.

In other preferred embodiments of the present invention, as shown in fig. 7 and 8, the refrigerant pipeline includes a plurality of coaxially arranged cylindrical structures, and each cylindrical structure is coaxially arranged with the radiant heat exchanging part 20. The cylindrical structure comprises at least one heat exchange cylinder 36, and a plurality of second refrigerant channels 37 are arranged in the wall of each heat exchange cylinder 36. The heat radiation fins 33 are plural. At least the outer side of the innermost tubular structure has a plurality of heat radiating fins 33. For example, the outer side of the innermost tubular structure may have a plurality of heat dissipating fins 33, and optionally, the inner side of the innermost tubular structure may also have a plurality of heat dissipating fins 33. A plurality of heat radiating fins 33 are provided inside the outermost cylindrical structure; and the outside of the outermost cylindrical structure is thermally connected to the inner wall surface of the radiant heat exchanging portion 20 through a plurality of radiating fins 33, or the outer wall surface of the outermost cylindrical structure is integrally formed with or in contact with the inner wall surface of the radiant heat exchanging portion 20.

Further, the number of the cylindrical structures is plural, a fin layer is provided between every two adjacent cylindrical structures, and each fin layer has a plurality of the above-described heat dissipation fins 33. Preferably, the plurality of heat dissipation fins 33 of each fin layer are uniformly distributed along the circumferential direction of the radiant heat exchanging portion 20; and each of the heat radiating fins 33 extends in the axial direction of the radiant heat exchanging part 20 to define a plurality of air flow passages. Each of the heat dissipating fins 33 may be provided with one or more heat dissipating holes. When the outer side of the outermost cylindrical structure is thermally connected to the inner wall surface of the radiant heat exchanging portion 20 by the plurality of radiating fins 33, that is, the outer side of the outermost cylindrical structure is thermally connected to the inner wall surface of the radiant heat exchanging portion 20 by one fin layer. In some alternative embodiments, the heat dissipating fins 33 are flat plate-like heat dissipating fins or pin-like heat dissipating fins.

Each second refrigerant passage 37 extends in the axial direction of the radiant heat exchanging part 20. The plurality of second refrigerant channels 37 in the wall of each heat exchange tube 36 are sequentially arranged along the circumferential direction of the heat exchange tube 36. The cross section of the second refrigerant channels 37 in the wall of each heat exchange tube 36 may include a circle and a polygon, the polygon may be an approximately rectangular structure, and the polygonal second refrigerant channels and the circular second refrigerant channels are sequentially and alternately arranged along the circumferential direction of the heat exchange tube 36.

In some embodiments of the present invention, the cylindrical structure further comprises at least one support cylinder, and each support cylinder is disposed between two adjacent heat exchange cylinders 36, or disposed inside the innermost heat exchange cylinder 36, or disposed between the outermost heat exchange cylinder 36 and the radiant heat exchanging part 20. Further, the heat radiating fins 33 may be integrally formed with the respective cylindrical structures on the inner sides thereof, and the outer sides may be in contact abutment with the respective cylindrical structures on the outer sides thereof.

In some embodiments of the present invention, in every two adjacent heat exchange cylinders 36, the area of the cross section of each second refrigerant channel 37 on the outer heat exchange cylinder 36 is larger than the area of the cross section of the corresponding second refrigerant channel 37 on the inner heat exchange cylinder 36. For example, the height of each second refrigerant channel 37 on the outer heat exchange cylinder 36 extending along the radial direction of the radiant heat exchanging part 20 is greater than the height of each second refrigerant channel 37 on the inner heat exchange cylinder 36 extending along the radial direction of the radiant heat exchanging part 20.

In each two adjacent fin layers, the height of the outer-side heat dissipation fin 33 extending in the radial direction of the radiation heat exchanging portion 20 is greater than the height of the inner-side heat dissipation fin 33 extending in the radial direction of the radiation heat exchanging 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 channel 37 is 0.6-10 mm.

In some embodiments of the present invention, the convection heat exchanger 30 defines a central channel 38 extending in an axial direction of the radiant heat exchanger 20, and is located at the center of the space inside the radiant heat exchanger 20. The central passage 38 may be configured to circulate air or coolant. In other embodiments, both ends of the central channel 38 are provided with a closed structure, and the central channel 38 may also be configured to provide fittings such as shunt tubes. 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 radiant heat exchange part 20 can be made of copper or aluminum.

In some embodiments of the present invention, the convective heat transfer part 30 is formed by an extrusion process for manufacturing convenience, that is, the convective heat transfer part 30 is preferably a one-piece member. Alternatively, the entire structure of the convection heat exchanging part 30 and the radiant heat exchanging part 20 is formed by an extrusion process. That is, the entire structure of the convection heat exchanger 30 and the radiant heat exchanger 20 is an integrated workpiece. The radiating fins 33 are directly communicated with the wall surfaces of the first refrigerant channel 32/the second refrigerant channel 37, belong to the same part, and have no problem of thermal contact resistance between the first refrigerant channel and the second refrigerant channel, so that the heat transfer resistance between the refrigerant and the air can be obviously reduced, and the heat exchange performance is improved.

In some embodiments of the present invention, the refrigerant pipeline further has a main inlet pipe and a main outlet pipe; one end of each of the first refrigerant channel 32/the second refrigerant channel 37 is communicated with the main inlet pipe, and the other end is communicated with the main outlet pipe, so that the plurality of first refrigerant channels 32/the second refrigerant channels 37 are connected in parallel. Further, the end of each heat exchange plate 31 or heat exchange cylinder 36 may be provided with a collecting inlet pipe or a collecting outlet pipe, and the collecting inlet pipe or the collecting outlet pipe is arranged right opposite to the heat exchange plate 31 or the heat exchange cylinder 36, so that the flow of the air flow in the convection heat exchange part 30 is not obstructed. That is, a refrigerant diverging tube bundle and a refrigerant converging tube bundle are respectively disposed at both ends of each heat exchange plate 31 or heat exchange tube 36, and are arranged according to the refrigerant flowing position of the pipe section to guide the flow of the refrigerant. The position of the air flow channel is reserved, and the air can flow smoothly by force.

In other embodiments of the present invention, the radiant convective heat exchanger 200 can have at least one parallel unit, each parallel unit having multiple channel groups. Each channel group is provided with at least one first refrigerant channel 32/second refrigerant channel 37; the head and the tail of the plurality of channel groups of each parallel unit are sequentially connected in series. When the number of the parallel units is multiple, the multiple parallel units are connected in parallel. Each channel group may have one heat exchanger plate 31 as described above. For example, the number of the heat exchange plates 31 is 20, wherein 5 heat exchange plates 31 constitute 5 channel groups, and the heat exchange plates are arranged in series end to end, that is, 5 heat exchange plates 31 constitute a parallel unit, that is, 4 parallel units in total, and the 4 parallel units are connected in parallel with each other. Further, the end of each heat exchange plate 31 or heat exchange cylinder 36 may be provided with a collecting inlet pipe or a collecting outlet pipe, and the collecting inlet pipe or the collecting outlet pipe is arranged right opposite to the heat exchange plate 31 or the heat exchange cylinder 36, so that the flowing of the air flow in the convection heat exchange part 30 is not obstructed, and the pipes are conveniently and reasonably arranged.

In some embodiments of the present invention, each radiant heat exchanging part 20 is spaced apart from the radiant plate 130 so that each radiant heat exchanging part 20 radiates heat or cold to the radiant plate 130 from the outer wall thereof. In some alternative embodiments of the present invention, the outer wall surface of each radiant heat exchanging part 20 is disposed in contact with all rear side surfaces of the radiant plates 130 which are located at the front side of the radiant heat exchanging part 20, for example, the surface of each radiant heat exchanging part 20 facing the radiant plates 130 is disposed in contact with all rear side surfaces of the radiant plates 130 which are located at the front side of the radiant heat exchanging part 20. In other alternative embodiments of the present invention, a portion of the outer wall surface of each radiant heat exchanging part 20 is disposed in contact with a portion of the rear side surface of the radiant plate 130 directly in front of the radiant heat exchanging part 20, and a portion of the outer wall surface of each radiant heat exchanging part 20 is disposed at a distance from the remaining portion of the rear side surface of the radiant plate 130 directly in front of the radiant heat exchanging part 20. Further, when there is a gap between the radiation heat exchanging part 20 and the radiation plate 130, the air supply device 300 may be configured to cause a part of the air flow entering through the air inlet 110 to flow through the gap between the radiation heat exchanging part 20 and the radiation plate 130 and then flow out of the air supply outlet 120. In some further embodiments of the present invention, the cabinet air conditioner indoor unit further includes a water pan 400 disposed at a lower side of the radiation convection type heat exchanger 200. The air inlet 110 is positioned higher than the water-receiving tray 400 and lower than the radiant heat exchanging 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 radiant heat exchanging portions 20. For example, two radiant heat exchanging parts 20 may be provided, and the first fan 310 is an axial flow fan, and is disposed between the two radiant heat exchanging parts 20 to promote the air flow from the inside of the lower radiant heat exchanging part 30 to the inside of the upper radiant heat exchanging part 30. Further, the air supply device 300 further includes a second fan 320 disposed on the upper side of the uppermost radiant heat exchanging portion 20. The second fan may be a centrifugal fan.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. An indoor unit of a cabinet air conditioner, comprising:

the heat or cold absorption type air conditioner comprises a shell, wherein an air inlet is formed in the lower part of the shell, an air supply outlet is formed in the upper part of the shell, the front part of the shell comprises a radiation plate, and the radiation plate absorbs heat or cold from the rear side of the radiation plate and radiates the heat or cold from the front side of the radiation plate to the outside;

a plurality of radiant-convection heat exchangers, each having a radiant heat exchanging portion and a convection heat exchanging portion, and disposed within the housing; the radiation heat exchange part is in a cylindrical shape with openings at two ends and extends along the vertical direction, is configured to absorb heat or cold from the inner wall surface of the radiation heat exchange part and transfer the heat or cold to the radiation plate from the outer wall surface of the radiation heat exchange part; the convection heat exchange part is arranged on the inner side of the radiation heat exchange part, is configured to generate heat or cold, and transmits the heat or cold to air flowing through the inner side of the radiation heat exchange part and transmits the heat or cold to the inner wall surface of the radiation heat exchange part; the plurality of radiation heat exchange parts are sequentially arranged along the vertical direction and are coaxially arranged; and

and the air supply device is arranged in the shell and is configured to at least cause airflow to sequentially enter the inner sides of the plurality of radiation heat exchange parts from the air inlet, and the airflow flows out of the air supply outlet after exchanging heat with each convection heat exchange part.

2. The cabinet air-conditioning indoor unit of claim 1,

each radiation heat exchange part is arranged at a distance from the radiation plate so that each radiation heat exchange part radiates heat or cold to the radiation plate from the outer wall surface of the radiation heat exchange part; or the like, or, alternatively,

each radiation heat exchange part is arranged in contact with all the rear side surfaces of the radiation plates, which are positioned at the front side of the radiation heat exchange part; or the like, or, alternatively,

each radiation heat exchange part is arranged in contact with the rear side surface of the part of the radiation plate, which is positioned at the front side of the radiation heat exchange part, and is arranged at an interval with the rear side surface of the rest part of the radiation plate, which is positioned at the front side of the radiation heat exchange part.

3. The cabinet air conditioner indoor unit of claim 1, configured to:

controlling the flow of the refrigerant entering the lowest radiation convection type heat exchanger according to at least a first refrigerant evaporation temperature so as to dehumidify the airflow entering from the air inlet;

and controlling the flow of the refrigerant entering the uppermost radiation convection type heat exchanger according to at least the second refrigerant evaporation temperature so as to cool the air flow entering from the lower side of the radiation convection type heat exchanger.

4. The cabinet air-conditioning indoor unit of claim 1,

the air supply device comprises one or more first fans, and each first fan is arranged between two adjacent radiation heat exchange parts.

5. The cabinet air-conditioning indoor unit of claim 4, wherein,

the air supply device further comprises a second fan which is arranged on the uppermost side of the radiation heat exchange part.

6. The cabinet air-conditioning indoor unit of claim 5, wherein,

each first fan is an axial flow fan, and each second fan is a centrifugal fan.

7. The cabinet air-conditioning indoor unit of claim 1,

each of the convection heat exchange portions and the corresponding radiant heat exchange portion define a plurality of air flow passages extending in an axial direction of the radiant heat exchange portion.

8. The cabinet air-conditioning indoor unit of claim 1,

each heat convection part comprises a refrigerant pipeline and radiating fins arranged on the refrigerant pipeline.

9. The cabinet air-conditioning indoor unit of claim 8,

the refrigerant pipeline comprises a plurality of heat exchange plates, and each heat exchange plate is provided with a first edge and a second edge which extend along the axial direction of the radiation heat exchange part; the first edge is arranged in the middle of the space inside the radiation heat exchange part, and the second edge is connected to the inner wall surface of the radiation heat exchange part; a plurality of first refrigerant channels are arranged in each heat exchange plate; or the like, or, alternatively,

the refrigerant pipeline comprises one or more coaxially arranged cylindrical structures, and each cylindrical structure is coaxially arranged with the radiation heat exchange part; the cylindrical structure comprises at least one heat exchange cylinder, and one or more second refrigerant channels are arranged on the wall of each heat exchange cylinder.

10. The cabinet air-conditioning indoor unit of claim 1,

each convection heat exchange part is an integrated workpiece and is formed by adopting an extrusion process; or the like, or, alternatively,

the whole formed by each convection heat exchange part and the corresponding radiation heat exchange part is an integrated workpiece and is formed by adopting an extrusion process.

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