CN216346674U

CN216346674U - Machine in heat exchanger and air conditioning

Info

Publication number: CN216346674U
Application number: CN202121402623.3U
Authority: CN
Inventors: 刘晓蕾; 孟建军; 曹法立; 张文强
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-04-19
Anticipated expiration: 2031-06-23

Abstract

The utility model discloses a heat exchanger and an air-conditioning indoor unit, wherein the heat exchanger comprises a plurality of fins and a heat exchange tube penetrating through the fins, the fins form a windward side and a leeward side of the heat exchanger, the windward side is provided with at least one first arched surface protruding outwards along the extending direction of the heat exchange tube, and the width of the fin forming the first arched surface is larger than the width of other fins. The heat exchanger can solve the problems of uneven wind speed and higher running noise of each area of the heat exchanger in the existing air conditioner indoor unit.

Description

Machine in heat exchanger and air conditioning

Technical Field

The utility model relates to the technical field of air conditioners, in particular to a heat exchanger and an air conditioner indoor unit.

Background

At present, two types of cross-flow fans and centrifugal fans are generally adopted in air-conditioning indoor units, most of common wall-mounted air-conditioning indoor units in the market adopt the cross-flow fans, most of common air-conditioning indoor units in the air duct type air-conditioning indoor units adopt the centrifugal fans, the air supply characteristics of the cross-flow fans and the centrifugal fans are greatly different, and the corresponding structures and systems are completely different.

As shown in fig. 1, such an air conditioning indoor unit generally has 2 to 3 centrifugal fans 2, and an air outlet of the centrifugal fan 2 is opposite to the heat exchanger 1 to drive indoor air to perform heat exchange with refrigerant in the heat exchanger 1.

As shown in fig. 2, the wind velocity distribution diagram of the heat exchanger 1 corresponding to the 3 centrifugal fans 2 is shown, the abscissa is the dimension along the length direction of the heat exchanger 1, the ordinate is the dimension in the height direction of the heat exchanger 1, and the larger the bubble point is, the larger the wind velocity in the area is. It can be known that the wind speed distribution in each area of the heat exchanger 1 is very uneven, the wind speed in the partial area opposite to the air outlet of the centrifugal fan 2 is higher, and the wind speed in the partial areas at the two sides of the air outlet of the centrifugal fan 2 is lower.

Because the wind speed of each area of the heat exchanger 1 is uneven, the wind quantity of partial area is excessive, and the wind quantity of partial area is insufficient, the heat exchange efficiency of the heat exchanger 1 is influenced, and noise pollution can be caused.

Disclosure of Invention

The utility model aims to provide a heat exchanger, which is used for solving the problems of uneven wind speed and higher running noise of each area of the heat exchanger in the existing air-conditioning indoor unit.

In order to achieve the purpose, the utility model adopts the following technical scheme to realize the purpose:

a heat exchanger comprises a plurality of fins and a plurality of heat exchange tubes penetrating through the fins, wherein the fins form a windward side and a leeward side of the heat exchanger, the windward side is provided with at least one first arched surface protruding outwards along the extending direction of the heat exchange tubes, and the width of the fins forming the first arched surface is larger than the widths of other fins.

In some embodiments, the first arcuate surface is a symmetrical structure.

In some embodiments, the first arched surface comprises two first inclined planes and/or first arc-shaped curved surfaces and/or first convex planes arranged at an obtuse angle, and the first convex planes are parallel to the extending direction of the heat exchange tube.

In some embodiments, the windward side has a plurality of the first arcuate faces spaced apart.

In some embodiments, the leeward surface is a plane parallel to the extending direction of the heat exchange tube.

In some embodiments, the leeward side has at least one second arcuate surface protruding outward in the extending direction of the heat exchange pipe, and the second arcuate surface is arranged opposite to the first arcuate surface.

In some embodiments, the second arcuate surface is a symmetrical structure.

In some embodiments, the second arched surface includes two second inclined planes and/or second arc-shaped curved surfaces and/or second convex planes arranged at an obtuse angle, and the second convex planes are parallel to the extending direction of the heat exchange tube.

The utility model also provides an air conditioner indoor unit, which comprises the centrifugal fan and the heat exchanger.

In some embodiments, the first arcuate surface opposes an air outlet of the centrifugal fan.

Compared with the prior art, the utility model has the advantages and beneficial effects that:

the utility model utilizes fins with different widths to enable the windward side of the heat exchanger to be provided with at least one first arch surface protruding outwards along the extension direction of the heat exchange tube, when n centrifugal fans are arranged on the windward side of the heat exchanger, n first arch surfaces opposite to the air outlets of the n centrifugal fans can be formed on the windward side, on one hand, the width of the fin forming the first arch surface is larger than the width of other fins, so that part of the area corresponding to the convex first arch surface is thickened, the air flow resistance of each area of the heat exchanger is improved by enabling the first arch surface to be opposite to the air outlet of the centrifugal fan, the air speed of the part of the area corresponding to the air outlet of the centrifugal fan is reduced, the air speed of each area of the heat exchanger can be more uniform, the improvement of the heat exchange efficiency is facilitated, and the reduction of the operation noise is facilitated. On the other hand, the first arched surface of outside bulge can be closer to centrifugal fan, can not occupy extra space, also helps heat exchange efficiency's promotion.

Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a conventional air conditioner indoor unit;

FIG. 2 is a diagram of a wind velocity profile at a heat exchanger in a prior art air conditioning indoor unit;

FIG. 3 is a schematic layout of a heat exchanger and a centrifugal fan according to an embodiment of the present invention;

FIG. 4 is a schematic layout of a heat exchanger and a centrifugal fan according to another embodiment of the present invention;

FIG. 5 is a schematic layout of a heat exchanger and a centrifugal fan according to another embodiment of the present invention;

description of reference numerals:

in the attached figure 1: 1. a heat exchanger; 2. a centrifugal fan;

in figures 3 to 5: 3. a heat exchanger; a windward side 31; a first arcuate face 311; a leeward side 32; a second arcuate face 321; 4. a centrifugal fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; the connection can be direct connection or indirect connection through an intermediate medium, and the connection can be internal to 2 elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The terms "central," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the utility model and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the utility model.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means 2 or more unless otherwise specified.

In the description of the present invention, "and/or" is only one kind of association relationship describing an association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The air conditioner comprises an air conditioner indoor unit and an air conditioner outdoor unit, wherein the air conditioner outdoor unit is a part of a refrigeration cycle and comprises a compressor and an outdoor heat exchanger, the air conditioner indoor unit comprises a shell, an indoor heat exchanger and a fan, the shell forms the appearance of the air conditioner indoor unit, an air inlet and an air outlet are formed in the shell, and an air flow passage for air circulation is formed between the air inlet and the air outlet.

The fan and the indoor heat exchanger are positioned in an air flow channel communicated with the air inlet and the air outlet, the indoor heat exchanger is arranged between the fan and the air outlet and is used for carrying out heat exchange on air in the air flow channel, and the heat exchange can be one of heat exchange or refrigeration exchange.

The embodiment of the utility model provides a heat exchanger 3, which comprises a plurality of fins and heat exchange tubes arranged on the plurality of fins in a penetrating manner, wherein the plurality of fins form a windward side 31 and a leeward side 32 of the heat exchanger 3, the widths of the plurality of fins are changed along the extension direction of the heat exchange tubes, so that the windward side 31 is provided with at least one first arched surface 311 protruding outwards along the extension direction of the heat exchange tubes, and the width of the fin forming the first arched surface 311 is larger than the widths of other fins.

When applied to an air conditioning indoor unit, when n centrifugal fans 4 are disposed on the windward surface 31 of the heat exchanger 3, n first arcuate surfaces 311 opposite to the air outlets of the n centrifugal fans 4 may be formed on the windward surface 31. On the one hand, the width of the fin that forms first arched surface 311 is greater than the width of other fins, make the partial region that corresponds first arched surface 311 of evagination thicken, it is relative with centrifugal fan 4's air outlet through with first arched surface 311, improve the air flow resistance in each region of heat exchanger 3, the partial region's that has reduced corresponding centrifugal fan 4 air outlet wind speed, can make the wind speed in each region of heat exchanger 3 more even, not only help the improvement of heat exchange efficiency, also help the reduction of running noise. On the other hand, the first arched surface 311 protruding outward can be closer to the centrifugal fan 4, and does not occupy additional space, and also contributes to the improvement of heat exchange efficiency.

As shown in fig. 3, the first arcuate surface 311 is composed of two first inclined planes disposed at an obtuse angle, which are inclined with respect to the extending direction of the heat exchange pipe.

In some embodiments, as shown in fig. 4, the first arcuate surface 311 may be an arc surface, and more specifically, may be an arc surface, an elliptical arc surface, a parabolic surface, or a multi-segment arc surface formed by splicing a plurality of segments of arcs.

In some embodiments, as shown in fig. 5, the first arcuate surface 311 may be a first convex plane parallel to the extending direction of the heat exchange pipe, and the first arcuate surface 311 constitutes a boss structure.

In this embodiment, specifically, 3 first arched surfaces 311 are disposed on the windward side 31 at intervals, and may be applied to an air conditioning indoor unit having 3 centrifugal fans 4, and the distance between the 3 first arched surfaces 311 and the size of the first arched surfaces 311 may be specifically designed with reference to the arrangement manner of the centrifugal fans 4 and the size of the centrifugal fans 4.

In the present embodiment, the leeward surface 32 of the heat exchanger 3 is a plane parallel to the extending direction of the heat exchange tube, that is, one end of all the fins forming the leeward surface 32 is aligned, and therefore, the more convex the area in the first arcuate surface 311, the larger the width of the corresponding fin.

As shown in fig. 3, the first arched surface 311 of this embodiment is a symmetrical structure, and can be better adapted to the air outlet of the centrifuge.

Of all the fins forming the first arcuate surface 311, the closer to the centerline Y of the first arcuate surface 311, the greater the width of the fin.

In some embodiments, the leeward side 32 of the heat exchanger 3 may also be non-planar.

As shown in fig. 4, in some embodiments, the leeward side 32 has at least one second arcuate surface 321 protruding outward in the extending direction of the heat exchange pipe, and the second arcuate surface 321 is disposed opposite to the first arcuate surface 311 to sufficiently thicken a specific area of the heat exchanger 3.

In some embodiments, the number of second arcuate faces 321 may be different from the number of first arcuate faces 311.

In some embodiments, the second arcuate face 321 may have a different structure than the first arcuate face 311.

In some embodiments, the second arcuate surface 321 may also be composed of two second inclined planes disposed at an obtuse angle, so-called second inclined planes being inclined with respect to the extending direction of the heat exchange tube.

In some embodiments, the first arcuate surface 311 may also be a second arcuate surface, and more specifically, may be an arc surface, an elliptical arc surface, a parabolic surface, or a multi-segment arc surface formed by splicing a plurality of segments of arcs.

In some embodiments, the second arcuate surface 321 may also be a second convex plane, the second convex plane being parallel to the extending direction of the heat exchange tube, the second arcuate surface 321 constituting a boss structure.

Based on the heat exchanger 3, the embodiment of the utility model further provides an air conditioner indoor unit, which comprises a centrifugal fan 4 and the heat exchanger 3 in the embodiment.

In order to improve the uniformity of heat exchange of each region of the heat exchanger 3 along the extending direction of the heat exchange tube, the first arched surface 311 is opposite to the air outlet of the centrifugal fan 4 in this embodiment.

Further, when the first arcuate surface 311 is of a symmetrical structure, a center line Y of the first arcuate surface 311 is aligned with a center line X of the air outlet of the centrifugal fan 4, as shown in fig. 3.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A heat exchanger comprises a plurality of fins and a heat exchange tube penetrating through the plurality of fins, wherein the plurality of fins form a windward side and a leeward side of the heat exchanger.

2. The heat exchanger of claim 1, wherein the first arcuate surface is a symmetrical structure.

3. The heat exchanger according to claim 1, wherein the first arcuate surface comprises two first inclined planes and/or first curved surfaces and/or first convex planes arranged at an obtuse angle, and the first convex planes are parallel to the extending direction of the heat exchange tube.

4. The heat exchanger of claim 1, wherein the windward surface has a plurality of the first arcuate faces spaced apart.

5. The heat exchanger of claim 1, wherein the leeward surface is a plane parallel to the direction of extension of the heat exchange tubes.

6. The heat exchanger of claim 1, wherein the leeward surface has at least one second arcuate surface projecting outwardly in a direction of extension of the heat exchange tube, the second arcuate surface being disposed opposite the first arcuate surface.

7. The heat exchanger of claim 6, wherein the second arcuate surface is a symmetrical structure.

8. The heat exchanger according to claim 6, wherein the second arcuate surface comprises two second inclined planes and/or second arc-shaped curved surfaces and/or second convex planes arranged at an obtuse angle, and the second convex planes are parallel to the extending direction of the heat exchange tube.

9. An indoor unit of an air conditioner comprising a centrifugal fan, characterized by comprising the heat exchanger of any one of claims 1 to 8.

10. An indoor unit of an air conditioner according to claim 9, wherein the first arcuate surface is opposed to an air outlet of the centrifugal fan.