Evaporator with uniform flow distribution

Abstract

The utility model discloses an evaporator with uniform flow distribution, which comprises an upper collecting pipe, a lower collecting pipe and a flat pipe group arranged between the upper collecting pipe and the lower collecting pipe, and the upper collecting pipe is divided into a refrigerant inflow cavity and a gas outflow cavity by a transverse partition plate; the lower collecting pipe is not provided with a transverse clapboard; a first longitudinal partition plate is arranged in the middle of the refrigerant inflow cavity to divide the refrigerant inflow cavity into a first refrigerant inflow cavity and a second refrigerant inflow cavity. A first flow dividing pipe and a second flow dividing pipe are arranged in the refrigerant inflow cavity, and flow dividing holes are formed in the first flow dividing pipe located in the first refrigerant inflow cavity and the second flow dividing pipe located in the second refrigerant inflow cavity. A refrigerant storage cavity is formed in the position, close to the refrigerant inlet, of the refrigerant inflow cavity, and the first flow dividing pipe and the second flow dividing pipe are connected with the refrigerant storage cavity. The evaporator is novel in structure, refrigerants are conveyed to the flat pipe at the tail through the built-in pipeline, it is guaranteed that the flow of the refrigerants at the flat pipe at the tail is sufficient, and therefore the overall evaporation effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of vehicle evaporators, and particularly relates to an evaporator with uniform flow distribution. Background Art

[0002] The vehicle evaporator is a key component in the automotive air-conditioning refrigeration system. Its main function is to convert the low-temperature and low-pressure liquid refrigerant into a gas through a heat exchange process, thereby absorbing and taking away the heat of the air inside the vehicle to achieve the effects of cooling and dehumidifying the vehicle interior.

[0003] The traditional vehicle evaporator transports the refrigerant through a refrigerant inflow chamber. Since the flat tube groups are arranged in sequence, more refrigerant will flow into the front flat tube groups. The flat tube groups further back, especially the flat tube groups at the tail, often have insufficient refrigerant, and further the evaporator cannot fully absorb heat, affecting the refrigeration effect. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an evaporator with uniform flow distribution and good evaporation effect.

[0005] The purpose of the utility model is achieved as follows: An evaporator with uniform flow distribution includes an upper header, a lower header, and a flat tube group disposed between the upper header and the lower header. The upper header is divided into a refrigerant inflow chamber and a gas outflow chamber by a transverse partition. A refrigerant inlet is provided at the end of the refrigerant inflow chamber, and a gas outlet is provided at the end of the gas outflow chamber. The lower header has no transverse partition.

[0006] The middle part of the refrigerant inflow chamber is divided into a first refrigerant inflow chamber and a second refrigerant inflow chamber by a first longitudinal partition. A first shunt tube and a second shunt tube are provided in the refrigerant inflow chamber. The first shunt tube is located in the first refrigerant inflow chamber, and the second shunt tube is disposed through the first refrigerant inflow chamber and the second refrigerant inflow chamber. Shunt holes are provided on both the first shunt tube located in the first refrigerant inflow chamber and the second shunt tube located in the second refrigerant inflow chamber. A refrigerant storage chamber is provided at the refrigerant inflow chamber near the refrigerant inlet. The first shunt tube and the second shunt tube are connected to the refrigerant storage chamber.

[0007] Preferably, a second longitudinal partition is provided at the refrigerant inflow chamber near the refrigerant inlet, and the area between the second longitudinal partition and the end of the refrigerant inflow chamber is the refrigerant storage chamber.

[0008] Preferably, the first shunt tube and the second shunt tube are tube body structures with one end open. The open ends of the first shunt tube and the second shunt tube are connected to the second longitudinal partition and communicate with the refrigerant storage chamber.

[0009] Preferably, the first shunt pipe and the second shunt pipe are of the same size and are arranged side by side front and back on the same horizontal plane.

[0010] Preferably, the inlets of the first shunt pipe and the second shunt pipe communicating with the second longitudinal partition are located above the bottom plate of the refrigerant storage cavity.

[0011] Preferably, the shunt holes are located directly below the first shunt pipe and the second shunt pipe.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. Two groups of shunt pipes, namely the first shunt pipe and the second shunt pipe, are provided. Through the first shunt pipe and the second shunt pipe, the refrigerant in the refrigerant storage cavity can be transported to the first refrigerant inflow cavity and the second refrigerant inflow cavity respectively, that is, it can avoid transporting the refrigerant through one refrigerant inflow cavity, effectively avoiding the phenomenon of insufficient refrigerant at the end, and further ensuring that a sufficient amount of refrigerant can flow into the flat pipes at the rear.

[0014] 2. The first shunt pipe and the second shunt pipe are arranged side by side front and back, and the inlets are located above the bottom plate of the refrigerant storage cavity. After the refrigerant enters the refrigerant storage cavity, when the refrigerant is higher than the inlets, the refrigerant can flow evenly into the first shunt pipe and the second shunt pipe, ensuring that the refrigerant flow rates transported to the first refrigerant inflow cavity and the second refrigerant inflow cavity are equivalent, and can more efficiently improve the heat transfer efficiency of each flat pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model.

[0016] Figure 2 is an internal structural schematic diagram of the upper header pipe of the present utility model without side plates.

[0017] Figure 3 is a schematic structural diagram of the shunt holes of the upper header pipe and the lower header pipe of the present utility model.

[0018] Among them, 1 is the upper header pipe, 101 is the refrigerant inflow cavity, 1011 is the refrigerant inlet, 1012 is the first refrigerant inflow cavity, 1013 is the second refrigerant inflow cavity, 1014 is the refrigerant storage cavity, 102 is the gas outflow cavity, 1021 is the gas outlet, 2 is the lower header pipe, 3 is the flat pipe group, 4 is the transverse partition, 5 is the first longitudinal partition, 6 is the first shunt pipe, 7 is the second shunt pipe, 8 is the shunt hole, and 9 is the second longitudinal partition. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand the other advantages and effects of the present utility model from the content disclosed in this specification.

[0020] It should be noted that in the description of the present invention, it should be noted that for the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. The terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0021] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] As Figures 1-3 shown, an evaporator with uniform flow distribution includes an upper header 1, a lower header 2, and a flat tube group 3 disposed between the upper header 1 and the lower header 2. The upper header 1 is divided into a refrigerant inlet chamber 101 and a gas outlet chamber 102 by a transverse partition 4. A refrigerant inlet 1011 is provided at the end of the refrigerant inlet chamber 101, and a gas outlet 1021 is provided at the end of the gas outlet chamber 102; the lower header 2 has no transverse partition;

[0023] In the middle of the refrigerant inlet chamber 101, a first longitudinal partition 5 divides it into a first refrigerant inlet chamber 1012 and a second refrigerant inlet chamber 1013. In the refrigerant inlet chamber 101, a first shunt pipe 6 and a second shunt pipe 7 are provided. The first shunt pipe 6 is located in the first refrigerant inlet chamber 1012, and the second shunt pipe 7 is disposed through the first refrigerant inlet chamber 1012 and the second refrigerant inlet chamber 1013. Shunt holes 8 are provided on both the first shunt pipe 6 located in the first refrigerant inlet chamber 1012 and the second shunt pipe 7 located in the second refrigerant inlet chamber 1013. A refrigerant storage chamber 1014 is provided at the refrigerant inlet 1011 of the refrigerant inlet chamber 101, and the first shunt pipe 6 and the second shunt pipe 7 are connected to the refrigerant storage chamber 1014.

[0024] As Figure 2 shown, a second longitudinal partition 9 is provided at the refrigerant inlet 1011 of the refrigerant inlet chamber 101, and the area between the second longitudinal partition 9 and the end of the refrigerant inlet chamber 101 is the refrigerant storage chamber 1014.

[0025] As Figure 2 shown, the first shunt pipe 6 and the second shunt pipe 7 are tube structures with one end open. The open ends of the first shunt pipe 6 and the second shunt pipe 7 are connected to the second longitudinal partition 9 and communicate with the refrigerant storage chamber. After the refrigerant enters from the refrigerant inlet, it is first placed in the refrigerant storage chamber until it is higher than the inlet of the shunt pipe, and then flows into the shunt pipe to form a communication loop.

[0026] As Figure 2 shown, the first shunt pipe 6 and the second shunt pipe 7 are of the same size and are arranged side by side in the front and back on the same horizontal plane. That is, after the refrigerant is higher than the inlet of the shunt pipe, it can enter the two shunt pipes simultaneously, which can further ensure the refrigerant flow rate entering the two shunt pipes at the same time.

[0027] As Figure 2 shown, the inlets of the first shunt pipe 6 and the second shunt pipe 7 communicating with the second longitudinal partition 9 are located above the bottom plate 1014 of the refrigerant storage chamber. After the refrigerant enters the refrigerant storage chamber, when the refrigerant is higher than the inlet, the refrigerant can flow evenly into the first shunt pipe and the second shunt pipe, which can ensure that the refrigerant flow rates transported to the first refrigerant inlet chamber and the second refrigerant inlet chamber are quite the same, and can more efficiently improve the heat transfer efficiency of each flat tube.

[0028] As Figure 3 shown, the shunt holes 8 are located directly below the first shunt pipe 6 and the second shunt pipe 7. After the refrigerant flows into the first shunt pipe and the second shunt pipe, it can quickly shunt the refrigerant to the respective corresponding inlet chambers through the shunt holes at the bottom, and then enter the flat tube group.

[0029] The working principle of the present utility model is described as follows: The refrigerant enters from the refrigerant inlet. First, a part of the refrigerant is stored in the refrigerant storage cavity. After the refrigerant in the refrigerant storage cavity is higher than the inlet of the shunt pipe, the refrigerant can evenly flow into the first shunt pipe and the second shunt pipe, and finally, it is shunted to the corresponding flat tube groups through the shunt pipe. The whole device can more efficiently improve the heat transfer efficiency of each flat tube, and has a good evaporation effect.

[0030] The embodiments described above are only descriptions of the preferred embodiments of the present utility model, and do not limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, various variations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope of the present utility model. The technical content claimed by the present utility model has been fully recorded in the claims.

Claims

1. An evaporator with uniform flow distribution, comprising an upper header, a lower header, and a flat tube group disposed between the upper header and the lower header, wherein the upper header is divided into a refrigerant inlet chamber and a gas outflow chamber by a transverse partition, a refrigerant inlet is provided at the end of the refrigerant inlet chamber, and a gas outlet is provided at the end of the gas outflow chamber; the lower header has no transverse partition; characterized in that A first longitudinal partition is provided in the middle of the refrigerant inflow cavity to divide it into a first refrigerant inflow cavity and a second refrigerant inflow cavity; a first shunt pipe and a second shunt pipe are provided in the refrigerant inflow cavity, the first shunt pipe is located in the first refrigerant inflow cavity, and the second shunt pipe is arranged through the first refrigerant inflow cavity and the second refrigerant inflow cavity; The first shunt tube located in the first refrigerant inflow cavity and the second shunt tube located in the second refrigerant inflow cavity are both provided with shunt holes; the refrigerant inflow cavity is provided with a refrigerant storage cavity near the refrigerant inlet, and the first shunt tube and the second shunt tube are connected to the refrigerant storage cavity.

2. The evaporator with uniform flow distribution according to claim 1, characterized in that: The refrigerant inlet chamber is provided with a second longitudinal partition plate near the refrigerant inlet, and the area between the second longitudinal partition plate and the end of the refrigerant inlet chamber is the refrigerant storage chamber.

3. The evaporator with uniform flow distribution according to claim 1, characterized in that: The first shunt pipe and the second shunt pipe are tube structures with one end open, and the open ends of the first shunt pipe and the second shunt pipe are connected to the second longitudinal partition and communicated with the refrigerant storage chamber.

4. The evaporator with uniform flow distribution according to claim 1, characterized in that: The first shunt pipe and the second shunt pipe have the same size and are arranged front and back in parallel on the same horizontal plane.

5. The evaporator with uniform flow distribution according to claim 1, characterized in that: The inlets of the first and second flow dividers communicating with the second longitudinal partition are located above the bottom plate of the refrigerant storage chamber.

6. The evaporator with uniform flow distribution according to claim 1, characterized in that: The diversion hole is located directly below the first diversion tube and the second diversion tube.

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