CN106403397A - Heat exchanger, air-conditioning outdoor unit and air-conditioner - Google Patents

Abstract

The invention discloses a heat exchanger, an air-conditioning outdoor unit and an air-conditioner. The heat exchanger comprises an air input header (1), a liquid output header (2) and multiple heat exchange pipes (3) connected between the air input header (1) and the liquid output header (2). The multiple heat exchange pipes (3) are in an arc shape and are arranged at intervals in the radial direction. The air input header (1) and the liquid output header (2) extend in the radial directions of the heat exchange pipes (3). According to the heat exchanger, the machining difficulty of the heat exchanger can be reduced, and meanwhile the heat exchange efficiency of the heat exchanger is effectively improved.

Description

Heat exchangers, air conditioner outdoor units and air conditioners

technical field

The invention relates to the technical field of air conditioning, in particular to a heat exchanger, an outdoor unit of an air conditioner and an air conditioner.

Background technique

The shape of the indoor heat exchanger of the existing air conditioner is rectangular, and the air supply surface of the fan is circular when the outdoor fan is running, resulting in a large part of the indoor heat exchanger's air volume not being properly utilized, which in turn affects the heat transfer efficiency of the entire heat exchanger .

A condenser is disclosed in the Chinese invention patent application with the application number "201510911474.6" and the invention title "a single-screw microchannel condenser". Coiled to form a spiral core, the liquid inlet header is set at the initial end of the heat dissipation flat tube, the liquid outlet header is set at the tail end of the heat dissipation flat tube, and heat sinks are arranged at the intervals between the heat dissipation flat tubes, and the bottom of the spiral core Mounted with stand.

The structure of the condenser in this application is spiral, so that the shape of the condenser can basically match the air supply surface of the fan, and the heat exchange efficiency of the condenser can be effectively improved. However, the structure of the spiral condenser is relatively complicated and difficult to process, and the condenser is a single spiral structure with a long process. During the flow of the refrigerant, the heat transfer efficiency of the refrigerant decays quickly, which will greatly affect the overall performance of the condenser. heat transfer efficiency.

Contents of the invention

The object of the present invention is to provide a heat exchanger, an air conditioner outdoor unit and an air conditioner, which can reduce the processing difficulty of the heat exchanger and effectively improve the heat exchange efficiency of the heat exchanger.

According to one aspect of the present invention, a heat exchanger is provided, including an inlet header, a liquid outlet header, and a plurality of heat exchange tubes connected between the inlet header and the outlet header, and a plurality of heat exchange tubes The tubes are arc-shaped and arranged at intervals along the radial direction, and the inlet header and the liquid outlet header both extend along the radial arrangement direction of the heat exchange tubes.

Preferably, the inlet header and the liquid outlet header divide the plurality of heat exchange tubes into a first tube group and a second tube group, the first tube group is located on the first side of the inlet header and the liquid outlet header, and the second The two-pipe group is located on the second side of the inlet and outlet headers.

Preferably, the inlet header and the liquid outlet header are located on a first straight line, and the first tube group and the second tube group are arranged symmetrically with respect to the first straight line.

Preferably, the first tube group and the second tube group are in multiple rows, and the multiple rows of the first tube group and the multiple rows of the second tube group are arranged in one-to-one correspondence or alternately along the width direction of the inlet header and the liquid outlet header.

Preferably, the first tube group and the second tube group are projected as a plurality of concentric circles in the axial direction of the first tube group.

Preferably, the inlet pipe of the inlet header and the outlet pipe of the liquid outlet header are copper pipes, and the heat exchange pipes are stainless steel pipes.

Preferably, the heat exchange tubes are flat tubes, and the section of each heat exchange tube increases radially from inner to outer.

According to another aspect of the present invention, an air conditioner outdoor unit is provided, including a casing, an air inlet, an air outlet, and an axial flow fan. The air conditioner outdoor unit also includes the above-mentioned heat exchanger, which is located between the axial flow fan and the inlet between the tuyere.

Preferably, the center of the heat exchanger is arranged concentrically with the center of the axial flow fan.

According to still another aspect of the present invention, an air conditioner is provided, including an air conditioner outdoor unit, where the air conditioner outdoor unit is the above-mentioned air conditioner outdoor unit.

The heat exchanger of the present invention comprises an inlet header, a liquid outlet header, and a plurality of heat exchange tubes connected between the inlet header and the liquid outlet header, the plurality of heat exchange tubes are arc-shaped, and Arranged at intervals in the radial direction, the inlet header and the liquid outlet header both extend along the radial direction of the heat exchange tubes. Since a plurality of heat exchange tubes are arranged at intervals in the radial direction, and each heat exchange tube is connected between the inlet header and the liquid outlet header, multiple refrigerant channels arranged in parallel can be formed, so that the refrigerant can pass through multiple The heat exchange tube flows from the inlet header to the liquid outlet header, which simplifies the processing structure of the heat exchange tube, reduces the processing difficulty of the heat exchange tube, shortens the refrigerant process of the heat exchange tube, and can effectively improve the heat transfer efficiency of the heat exchange tube. Thermal efficiency, improve the heat transfer efficiency of the heat exchanger.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is the structural representation of the heat exchanger of the embodiment of the present invention;

Fig. 2 is a schematic structural diagram of an outdoor unit of an air conditioner according to an embodiment of the present invention.

Explanation of reference signs: 1. Intake manifold; 2. Liquid outlet manifold; 3. Heat exchange tube; 4. First tube group; 5. Second tube group; 6. Shell; 7. Air outlet; 8 , Air inlet; 9, Axial flow fan; 10, Mounting frame.

detailed description

In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

In the following embodiments of the present invention, the orientation in Fig. 1 is taken as the reference orientation, the radial direction of the heat exchange tube is the length direction of the inlet header and the liquid outlet header, and the direction perpendicular to the paper surface is the inlet header and the width direction of the outlet header.

As shown in FIG. 1 , according to an embodiment of the present invention, the heat exchanger includes an inlet header 1 , an outlet header 2 and a plurality of heat exchangers connected between the inlet header 1 and the outlet header 2 The tube 3 and the plurality of heat exchange tubes 3 are arc-shaped and arranged at intervals along the radial direction. The inlet header 1 and the liquid outlet header 2 both extend along the radial direction of the heat exchange tubes 3 .

Since a plurality of heat exchange tubes 3 are arranged at intervals in the radial direction, and each heat exchange tube 3 is connected between the inlet header 1 and the outlet header 2, a plurality of parallel refrigerant passages can be formed, so that the refrigerant can At the same time, it flows from the intake header 1 to the outlet header 2 through multiple heat exchange tubes 3, which simplifies the processing structure of the heat exchange tube 3, reduces the processing difficulty of the heat exchange tube 3, and shortens the refrigerant flow rate of the heat exchange tube 3. The process can effectively improve the heat exchange efficiency of the heat exchange tube 3, thereby improving the heat exchange efficiency of the heat exchanger.

The intake header 1 and the liquid outlet header 2 divide the plurality of heat exchange tubes 3 into a first tube group 4 and a second tube group 5, and the first tube group 4 is located between the inlet header 1 and the liquid outlet header 2 On the first side, the second tube group 5 is located on the second side of the inlet header 1 and the outlet header 2 .

Dividing the heat exchange tube 3 into two tube groups can make the two tube groups form refrigerant channels, so that the refrigerant can flow from the inlet header 1 to the outlet header 2 more conveniently and quickly, improving the flow efficiency of the refrigerant , thereby improving the heat transfer efficiency of the refrigerant.

The intake manifold 1 and the liquid outlet manifold 2 are located on the first straight line, and the first tube group 4 and the second tube group 5 are arranged symmetrically with respect to the first line, so that they are located between the intake manifold 1 and the liquid outlet manifold. 2 The first tube group 4 and the second tube group 5 on both sides may have the same specifications, the refrigerant flowing from both sides of the inlet header 1 and the outlet header 2 is more balanced, and the heat exchange is more uniform. The heat exchange process of the heat pipe 3 is more consistent, the refrigerant distribution effect is better, and the gas-liquid mixing effect is better, so the heat exchange efficiency is higher.

Preferably, the inlet header 1 and the outlet header 2 are placed vertically, which can make full use of the state change of the refrigerant. After the gaseous refrigerant enters the heat exchanger from the intake header 1 for heat exchange, part of the gaseous refrigerant is cooled to liquid refrigerant, and then slides down to the outlet header 2 along the heat exchange tube 3 under the action of gravity, so that the outlet header A sufficient amount of liquid refrigerant can be collected in the tube 2, and then output to the indoor evaporator after passing through the expansion valve and other throttling components, while the gas refrigerant that has not been cooled to liquid will float up into the intake manifold 1, thus making the liquid outlet The header 2 will not be mixed with gaseous refrigerant, which can ensure that the state of the refrigerant output by the liquid outlet header 2 is in a liquid state. The liquid refrigerant flowing out of the heat exchanger can have better heat exchange efficiency with the indoor air after entering the indoor evaporator through expansion and throttling, improving the operating efficiency of the entire air conditioner.

Preferably, the first tube group 4 and the second tube group 5 are in multiple rows, and the multiple rows of the first tube group 4 and the multiple rows of the second tube group 5 are arranged one by one along the width direction of the inlet header 1 and the outlet header 2 Corresponding setting or alternate setting. The width direction here is substantially the axial extension direction of the first tube group 4 and the second tube group 5 . Since the heat exchange tubes can be arranged in various ways, an appropriate arrangement mode can be selected according to the heat exchange capacity of the heat exchange tubes to ensure that the heat exchanger has better heat exchange efficiency.

Preferably, the first tube group 4 and the second tube group 5 are projected as a plurality of concentric circles in the axial direction of the first tube group 4 . The first tube group 4 and the second tube group 5 can be single row or multiple rows. Since the first tube group 4 and the second tube group 5 are projected into a plurality of concentric circles in the axial direction of the first tube group 4, the shape of the heat exchange structure formed by the heat exchange tubes can be matched with the fan. The circular shape can make the air volume of the fan more fully and effectively utilized and improve the heat exchange efficiency of the heat exchanger.

In this embodiment, the inlet pipe of the inlet header 1 and the outlet pipe of the liquid outlet header 2 are copper pipes, and the heat exchange pipes 3 are stainless steel pipes. Among them, the inlet pipe of the inlet header 1 and the outlet pipe of the outlet header 2 are set as copper pipes to facilitate connection with other pipelines of the air conditioner and improve connection efficiency. Other structures are made of stainless steel. It is because the cost of stainless steel is relatively cheap, the process is mature, and there are no fins outside the stainless steel tube, so that the stainless steel heat exchange tube can maximize the heat exchange efficiency. The specifications of the stainless steel heat exchange tube are as follows: the inner diameter is Φ1-Φ10mm, and the wall thickness is 0.1-2.0mm. The heat exchange tubes can be flat tubes or round tubes.

Preferably, the heat exchange tubes 3 are flat tubes, and the section of each heat exchange tube 3 increases radially from inside to outside. Since the flow of the heat exchange tube 3 near the center of the heat exchanger is shorter, and the flow of the heat exchange tube 3 away from the center of the heat exchanger is longer, if both use the same flow area, it will inevitably lead to The circulation speed of the refrigerant is fast, while the circulation speed of the refrigerant in the heat exchange tubes on the outer peripheral side is relatively slow, which will easily lead to a large difference in the heat exchange efficiency of each heat exchange tube along the radial direction, which will affect the overall energy efficiency of the heat exchanger. By increasing the cross-section of each heat exchange tube 3 from the inside to the outside in the radial direction, the flow rate of the refrigerant in the heat exchange tube on the outer peripheral side can be accelerated, and the flow rate of the refrigerant in the heat exchange tube on the central side can be slowed down, so that the flow rate of the refrigerant in the heat exchange tube located at the center of the heat exchanger can be increased. The heat exchange efficiency of the refrigerant in the outer peripheral heat exchange tube can be kept consistent, and the working energy efficiency of the heat exchanger can be improved as a whole. The heat exchange tubes 3 can also be circular tubes, and each heat exchange tube 3 can also be arranged with equal cross-sections.

Referring to Fig. 2, according to an embodiment of the present invention, the air conditioner outdoor unit includes a housing 6, an air inlet 8, an air outlet 7 and an axial fan 9, and the air conditioner outdoor unit also includes the above-mentioned heat exchanger, which is located at Between the axial flow fan 9 and the air inlet 8. An air intake grille can also be arranged at the air inlet 8, so that the air intake can be more uniform and the heat exchange efficiency of the heat exchanger can be improved. In this embodiment, the outdoor unit of the air conditioner adopts a negative pressure suction method to supply air, which can make the air intake efficiency of the air conditioner higher, and the heat exchange efficiency between the air and the heat exchanger is higher.

The heat exchange tube 3 on the outermost periphery of the heat exchanger and the shell 6 are fixedly connected by a mounting frame 10, and there may be multiple mounting frames 10, which are evenly arranged along the circumferential direction of the heat exchange tube 3, so as to ensure that the heat exchange tube 3 The installation in the housing 6 is more stable and reliable, and the force is more uniform. The mounting frame 10 can be a support rod, a support plate, or other support connection structures.

Preferably, the center of the heat exchanger is arranged concentrically with the center of the axial flow fan 9 . Since the shape of the heat exchanger matches the axial flow fan 9, the heat exchange area of the heat exchanger can be used more effectively, and the heat exchange efficiency of the heat exchanger can be greatly improved.

According to an embodiment of the present invention, the air conditioner includes an air conditioner outdoor unit, and the air conditioner outdoor unit is the aforementioned air conditioner outdoor unit.

The description of the above embodiments is only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. A heat exchanger, characterized in that it comprises an inlet header (1), a liquid outlet header (2) and is connected between the inlet header (1) and the outlet header (2) A plurality of heat exchange tubes (3) between them, the plurality of heat exchange tubes (3) are arc-shaped, and arranged at intervals along the radial direction, the inlet header (1) and the outlet header (2) all extend along the radial arrangement direction of the heat exchange tubes (3). 2. The heat exchanger according to claim 1, characterized in that, the inlet header (1) and the outlet header (2) separate the plurality of heat exchange tubes (3) into the first A pipe group (4) and a second pipe group (5), the first pipe group (4) is located on the first side of the inlet manifold (1) and the outlet manifold (2), the The second tube group (5) is located on the second side of the inlet header (1) and the outlet header (2). 3. The heat exchanger according to claim 2, characterized in that, the inlet header (1) and the outlet header (2) are located on a first straight line, and the first tube group ( 4) and the second pipe group (5) are arranged symmetrically with respect to the first straight line. 4. The heat exchanger according to claim 2, characterized in that, the first tube group (4) and the second tube group (5) are in multiple rows, and the first tube group (4) in multiple rows ) and multiple rows of the second tube group (5) are arranged in one-to-one correspondence or alternately along the width direction of the inlet header (1) and the outlet header (2). 5. The heat exchanger according to claim 2, characterized in that, the first tube group (4) and the second tube group (5) are in the axial direction of the first tube group (4) The upper projection is a plurality of concentric circles. 6. The heat exchanger according to claim 1, characterized in that, the inlet pipe of the inlet header (1) and the outlet pipe of the liquid outlet header (2) are copper tubes, and the heat exchange Pipe (3) is a stainless steel pipe. 7 . The heat exchanger according to claim 1 , characterized in that, the heat exchange tubes ( 3 ) are flat tubes, and each of the heat exchange tubes ( 3 ) increases in cross-section from inside to outside along the radial direction. 8 . 8. An air conditioner outdoor unit, comprising a housing (6), an air inlet (8), an air outlet (7) and an axial fan (9), characterized in that the air conditioner outdoor unit also includes claims 1 to 7 The heat exchanger according to any one of the above, the heat exchanger is located between the axial flow fan (9) and the air inlet (8). 9. The air conditioner outdoor unit according to claim 8, characterized in that the center of the heat exchanger and the center of the axial flow fan (9) are arranged concentrically. 10. An air conditioner, comprising an air conditioner outdoor unit, characterized in that the air conditioner outdoor unit is the air conditioner outdoor unit according to claim 8 or 9.