Header assembly of heat exchanger and heat exchanger

Abstract

The utility model relates to a header assembly of a heat exchanger and the heat exchanger, the header assembly comprises a first pipe, the first pipe is provided with a first pipe cavity, and the first pipe cavity extends along the length direction of the first pipe; the first plate is at least partially located in the first pipe cavity, the first pipe cavity is divided into a first cavity and a second cavity by the first plate, the first plate is provided with at least one first hole, and the first cavity and the second cavity are communicated through the first hole; at least part of the second pipe is located in the first pipe cavity, the second pipe extends in the length direction of the first pipe, and the second pipe is provided with a first channel communicating with the first cavity and the second cavity; and the first inlet is located in the first pipe and communicates with the second cavity, and by means of the header assembly, gas-liquid mixing of two-phase refrigerants can be more uniform. The heat exchanger comprises the header assembly, and the heat exchange effect of the heat exchanger can be improved.

Description

Technical Field

[0001] The present application relates to the field of heat exchange technology, and in particular to a header assembly of a heat exchanger and a heat exchanger. Background Art

[0002] When the heat exchanger is used as an evaporator, the refrigerant that enters the manifold is a two-phase refrigerant. Under the action of gravity, the two-phase refrigerant will separate into gas and liquid in the manifold. The gaseous refrigerant flows upward into the upper part of the heat exchange tube, and the liquid refrigerant flows downward into the lower part of the heat exchange tube. The gas-liquid separation of the refrigerant is not conducive to the heat exchange of the heat exchanger. In this regard, in the related art, a mixing chamber and a connecting chamber divided by a partition are set in the inlet manifold, so that the refrigerant first enters the mixing chamber for mixing, and then enters the connecting chamber through the partition and is distributed to the heat exchange tube. Although this improves the gas-liquid separation, it still cannot avoid the phenomenon that the upper part of each connecting chamber has more gaseous refrigerant, resulting in weak heat exchange in the upper part of the heat exchange tube, so it is not ideal for improving the heat exchange effect of the heat exchanger. Utility Model Content

[0003] A first aspect of the present application provides a header assembly for a heat exchanger, which can make the two-phase refrigerant gas and liquid mix more uniformly.

[0004] On the other hand, the present application provides a heat exchanger having the header assembly described in the first aspect, and the heat exchanger has a better heat exchange effect.

[0005] The third aspect of the present application also provides another header assembly for a heat exchanger, which can also make the two-phase refrigerant gas and liquid mix more uniformly.

[0006] According to the first aspect of the present application, a header assembly of a heat exchanger is provided, specifically comprising:

[0007] A first tube, the first tube having a first lumen, the first lumen extending along the length direction of the first tube;

[0008] A first plate, wherein the first plate is at least partially located in the first lumen, the first plate divides the first lumen into a first cavity and a second cavity, and the first plate has at least one first hole, the first hole connecting the first cavity and the second cavity;

[0009] a second tube, wherein the second tube is at least partially located in the first tube cavity, the second tube extends along the length direction of the first tube, and the second tube has a first channel connecting the first cavity and the second cavity;

[0010] A first inlet is located in the first tube, and the first inlet is communicated with the second cavity.

[0011] In some embodiments, the header assembly further includes a second plate, the second plate is at least partially located in the second cavity, the second plate divides the second cavity into a first sub-cavity and a second sub-cavity, and in the vertical direction, the first sub-cavity is located above the second sub-cavity;

[0012] The first hole communicates with the first cavity and the first sub-cavity, the first channel communicates with the first cavity and the second sub-cavity, and the first inlet communicates with the first sub-cavity.

[0013] In some embodiments, at least one third hole is disposed on the wall of the second tube, and the wall of the second tube on which the third hole is disposed is located in the first cavity;

[0014] At least one end of the second tube along the length direction is provided with an opening, and the first channel is formed by the third hole and the opening communicating with the lumen of the second tube.

[0015] In some embodiments, at least one third hole and at least one fourth hole are provided on the wall of the second tube, the wall of the second tube provided with the third hole is located in the first cavity, the wall of the second tube provided with the fourth hole is located in the second sub-cavity, and the first channel is formed by connecting the third hole and the fourth hole to the cavity of the second tube.

[0016] In some embodiments, a plurality of slots are provided on the wall of the first tube, and the plurality of slots are arranged along the length direction of the first tube;

[0017] At least part of the third holes is located on a side of the second tube away from the slot hole, and at least part of the fourth holes is located on a side of the second tube facing the slot hole.

[0018] In some embodiments, the number of the first hole is one, and one end of the second tube along the length direction passes through the first hole;

[0019] There is a gap between the first hole and the outer wall of the second tube.

[0020] In some embodiments, in the vertical direction, the distance from the first inlet to the bottom end of the first tube is defined as d1, and the shortest distance from one end of the second tube along the length direction to the bottom end of the first tube is defined as d2;

[0021] Then d1 and d2 satisfy: d1>d2.

[0022] In some embodiments, the header assembly further includes a third plate, the third plate is at least partially located in the first cavity, the third plate divides the first cavity into a third sub-cavity and a fourth sub-cavity, and in the vertical direction, the third sub-cavity is located above the fourth sub-cavity;

[0023] The second tube has a second passage communicating with the third sub-cavity and the fourth sub-cavity.

[0024] In some embodiments, the header assembly further includes a fourth plate, the fourth plate being at least partially located in the second channel of the second tube;

[0025] The fourth plate has at least one second hole, and the second hole penetrates the fourth plate along the thickness direction of the fourth plate.

[0026] In some embodiments, the number of the third holes is N, where N≥3;

[0027] In the direction of gravity, the flow cross-sectional area of ​​the first third hole is defined as S1, and the flow cross-sectional area of ​​the Nth third hole is defined as S N There is an Xth third hole between the first third hole and the Nth third hole, and the flow cross-sectional area of ​​the Xth third hole is S X ;

[0028] Then S1, S N and S X Satisfies: S1>S X >S N .

[0029] The beneficial effects of this application are:

[0030] According to the first aspect of the present application, a header assembly of a heat exchanger is provided, wherein the header assembly has a first plate and a second tube in a first tube, the first plate divides the first tube cavity of the first tube into a first cavity and a second cavity, and the first plate has a first hole connecting the first cavity and the second cavity; the second tube extends along the length direction of the first tube, and the second tube has a first channel connecting the first cavity and the second cavity. After the header assembly is applied to the heat exchanger and connected with the heat exchange tube, the two-phase refrigerant enters the second cavity from the first inlet, and the refrigerant undergoes gas-liquid separation under the action of gravity, wherein a part of the refrigerant directly enters the heat exchange tube connected with the second cavity, and the other part of the refrigerant flows upward under the drive of the gaseous refrigerant. Of the refrigerant flowing upward, a part will enter the heat exchange tube connected with the second cavity due to the blocking effect of the first plate, and the other part will enter the first cavity through the first hole of the first plate. Of the refrigerant entering the first cavity, a part will enter the heat exchange tube connected with the first cavity, and the other part will circulate back to the second cavity under the guidance effect of the first channel, thereby mixing with the refrigerant in the second cavity. On the one hand, the first plate can block part of the refrigerant, preventing a large amount of refrigerant from flowing into the first sub-cavity and affecting the heat exchange of the second sub-cavity; on the other hand, it can also play the role of spraying refrigerant, so that the refrigerant gas-liquid mixture entering the first sub-cavity is more uniform. During the refrigerant mixing flow, the flow of gaseous refrigerant will carry part of the liquid refrigerant with it, so that the gaseous refrigerant can be guided to the lower part of the second cavity, and part of the liquid refrigerant can be brought in, so that the two-phase refrigerant gas-liquid mixture flows more evenly into the heat exchange tubes connected to each cavity, so as to give full play to the heat exchange effect of the heat exchange tubes.

[0031] According to another aspect of the present application, a heat exchanger is provided, the heat exchanger comprising:

[0032] A header assembly and a third tube, and a plurality of heat exchange tubes, wherein the heat exchange tubes connect the header assembly and the third tube, and the header assembly is the header assembly described in the first aspect.

[0033] In some embodiments, the number of the heat exchange tubes communicating with the first cavity is defined as A1, and the number of the heat exchange tubes communicating with the first sub-cavity is defined as A2;

[0034] Then A1 and A2 satisfy: 1 / 3≤A1 / A2≤3.

[0035] In some embodiments, the number of the heat exchange tubes communicating with the second sub-cavity is defined as A3;

[0036] Then A1, A2 and A3 satisfy: 2≤A1+A2 / A3≤4.

[0037] The beneficial effects of the present application are as follows: the heat exchanger includes a header assembly, a third tube and a heat exchange tube. After the two-phase refrigerant enters the header assembly, the gas-liquid mixture can be more evenly mixed and enter the connected heat exchange tubes, thereby giving full play to the heat exchange effect of the heat exchanger.

[0038] The header assembly provided according to the third aspect of the present application includes:

[0039] A first tube, the first tube having a first lumen, the first lumen extending along the length direction of the first tube;

[0040] A first plate, wherein the first plate is at least partially located in the first tube cavity, and the first plate divides the first tube cavity into a first cavity and a second cavity, and the first cavity and the second cavity extend along the length direction of the first tube;

[0041] a second plate and a third plate, wherein the second plate and the third plate separate the first cavity into a first sub-cavity, a second sub-cavity and a third sub-cavity, the first sub-cavity is connected to the second sub-cavity, and the second sub-cavity is separated from the third sub-cavity;

[0042] The first plate has at least one first hole and at least one second hole, the first hole connects the first sub-cavity and the second cavity, and the second hole connects the third sub-cavity and the second cavity;

[0043] A first inlet is located in the first tube, and the first inlet is communicated with the second sub-cavity.

[0044] The beneficial effects of this application are:

[0045] According to the third aspect of the present application, a header assembly of a heat exchanger is provided, and a first plate, a second plate and a third plate are arranged in the first tube cavity of the first tube of the header assembly, the first plate divides the first tube cavity into a first cavity and a second cavity, the second plate and the third plate divide the first cavity into a first sub-cavity, a second sub-cavity and a third sub-cavity, and the first sub-cavity and the second cavity are connected.

[0046] After the two-phase refrigerant enters the second sub-cavity from the first inlet, gas-liquid separation will occur under the action of gravity, wherein the first part of the refrigerant enters the heat exchange tube connected to the second sub-cavity, and the second part of the refrigerant enters the first sub-cavity. After entering the first sub-cavity, part of the refrigerant enters the heat exchange tube, and the other part will enter the second cavity driven by the gaseous refrigerant, and finally enter the heat exchange tube connected to the third sub-cavity along the air flow direction. On the one hand, the second plate has the effect of blocking the refrigerant, preventing the refrigerant from flowing into the first sub-cavity in large quantities and affecting the heat exchange of the second sub-cavity. On the other hand, it plays the role of spraying the refrigerant, so that the gas-liquid two-phase refrigerant can be mixed again after passing through the second plate, so that the gas-liquid mixing of the refrigerant entering the first sub-cavity is more uniform, and the heat exchange effect of the heat exchange tube connected to the first sub-cavity is fully exerted. After the refrigerant enters the first sub-cavity through the second plate, a portion of the gaseous refrigerant will flow into the second cavity through the first hole, and will carry part of the liquid refrigerant with it during the flow, thereby not only directing the excess gaseous refrigerant in the upper part to the lower part, but also bringing in part of the liquid refrigerant, so that the two-phase refrigerant can enter the heat exchange tube connected to the third sub-cavity in a gas-liquid mixed state, thereby giving full play to the heat exchange effect of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A schematic structural diagram of a specific embodiment of a header assembly provided in the present application;

[0048] Figure 2 A schematic structural diagram of a second embodiment of a header assembly provided in the present application;

[0049] Figure 3 for Figure 2 A structural schematic diagram of another embodiment of the present invention;

[0050] Figure 4 A schematic structural diagram of a third embodiment of a header assembly provided in the present application;

[0051] Figure 5 A schematic structural diagram of a fourth embodiment of a header assembly provided in the present application;

[0052] Figure 6 A schematic structural diagram of a specific embodiment of the heat exchanger provided in this application;

[0053] Figure 7 A schematic structural diagram of a second embodiment of a heat exchanger provided in the present application;

[0054] Figure 8 for Figure 6 A structural schematic diagram of another specific embodiment of the present invention;

[0055] Fig. 9This is a schematic structural diagram of the fifth embodiment of the manifold assembly provided in the present application.

[0056] Figure numerals: first tube 1, first tube cavity 11, first cavity 12, second cavity 13, slot 14, first sub-cavity 131, second sub-cavity 132, third sub-cavity 121, fourth sub-cavity 122, first plate 2, first hole 21, second tube 3, first channel 31, third hole 32, opening 33, fourth hole 34, second channel 35, first inlet 4, second plate 5, third plate 6, fourth plate 7, second hole 71, third tube 8, heat exchange tube 9, fin 10. DETAILED DESCRIPTION

[0057] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0058] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0059] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0060] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0061] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0062] An embodiment of the present application provides a header assembly for a heat exchanger. This article uses the header assembly for a parallel flow heat exchanger as an example to describe the technical solution and technical effects. Of course, the application field of the header assembly in the embodiment of the present application is not limited to the description in this article, and can also be applied to other types of heat exchangers.

[0063] like Figure 1 As shown, an embodiment of the present application provides a header assembly of a heat exchanger, specifically comprising: a first tube 1, the first tube 1 having a first tube cavity 11, and the first tube cavity 11 extends along the length direction of the first tube 1; in this embodiment, the cross-section of the first tube 1 perpendicular to the length direction is circular, that is, the shape of the first tube 1 is a round tube, but its shape is not limited to a round tube, and it can also be a square tube or a tubular structure of other shapes.

[0064] The first plate 2 is at least partially located in the first tube cavity 11, and the first plate 2 separates the first tube cavity 11 into a first cavity 12 and a second cavity 13. In the vertical direction, the first cavity 12 is located above the second cavity 13. The first plate 2 has at least one first hole 21, and the first hole 21 connects the first cavity 12 and the second cavity 13. Specifically, when the first tube 1 is along the vertical direction, the first plate 2 is arranged in the first tube cavity 11 of the first tube 1 substantially parallel to the horizontal direction. The first plate 2 can block the first cavity 12 and the second cavity 13 formed by separation, but due to the existence of the first hole 21, the two are not completely separated.

[0065] The second tube 3, the second tube 3 is at least partially located in the first tube cavity 11, the second tube 3 extends along the length direction of the first tube 1, and the second tube 3 has a first channel 31 connecting the first cavity 12 and the second cavity 13; in this embodiment, the length of one end of the second tube 3 extends out of the first tube 1, and the other end has a certain gap with the bottom end of the first tube 1. Of course, the second tube 3 can also be completely set in the first tube cavity 11 of the first tube 1, as long as it remains relatively fixed with the first tube 1.

[0066] The first inlet 4 is located in the first tube 1 , and the first inlet 4 is communicated with the second cavity 13 .

[0067] Taking the case where the manifold assembly is applied to a heat exchanger as an example, the heat exchanger can be a microchannel heat exchanger. After the two-phase refrigerant enters the second chamber 13 from the first inlet 4, the refrigerant will separate into gas and liquid under the action of gravity, wherein a part of the refrigerant directly enters the heat exchange tube 9 connected to the second chamber 13, and the other part of the refrigerant flows upward driven by the gaseous refrigerant. Of the refrigerant flowing upward, a part will enter the heat exchange tube 9 connected to the second chamber 13 due to the blocking effect of the first plate 2, and the other part will enter the first chamber 12 through the first hole 21 of the first plate 2. Of the refrigerant entering the first chamber 12, a part will enter the heat exchange tube 9 connected to the first chamber 12, and the other part will circulate back to the second chamber 13 under the guiding effect of the first channel 31, thereby mixing with the refrigerant in the second chamber 13. The first plate 2 can block part of the refrigerant on the one hand, and can also spray the refrigerant on the other hand, so that the refrigerant entering the first chamber 12 can be mixed again. During the mixed flow of the refrigerant, the flow of the gaseous refrigerant will carry part of the liquid refrigerant with it, so that the gaseous refrigerant can be guided to the lower part of the second chamber 13, and part of the liquid refrigerant can be brought in, so that the two-phase refrigerant gas-liquid is mixed more evenly, so that the refrigerant after entering the heat exchange tube 9 is mixed more evenly, thereby enhancing the heat exchange effect.

[0068] like Figure 2 As shown, in some embodiments, the manifold assembly further includes a second plate 5, and the second plate 5 is at least partially located in the second cavity 13. In the illustrated embodiment, the second plate 5 is completely disposed in the second cavity 13, but the second plate 5 may also partially expose the tube wall of the first tube 1. However, regardless of whether the second plate 5 is completely located in the second cavity 13, as long as the preset purpose can be achieved, that is, the second cavity 13 is divided into a first sub-cavity 131 and a second sub-cavity 132, in the vertical direction, the first sub-cavity 131 is located above the second sub-cavity 132. In this embodiment, the second plate 5 may completely separate the first sub-cavity 131 from the second sub-cavity 132, that is, the first sub-cavity 131 and the second sub-cavity 132 are not directly connected, and the second plate 5 may also be provided with a through hole to directly connect the first sub-cavity 131 and the second sub-cavity 132.

[0069] Due to the arrangement of the second plate 5, the second cavity 13 is divided into a first sub-cavity 131 and a second sub-cavity 132. Therefore, the first hole 21 connects the first cavity 12 and the first sub-cavity 131 of the second cavity 13; the first channel 31 connects the first cavity 12 and the second sub-cavity 132 of the second cavity 13, that is, the second tube 3 partially extends into the space of the second sub-cavity 132; the first inlet 4 is connected to the first sub-cavity 131.

[0070] In this embodiment, after the two-phase refrigerant enters the second tube 3, it enters the second sub-chamber 132 under the action of the first channel 31. At this time, if the first sub-chamber 131 and the second sub-chamber 132 are not directly connected, the refrigerant flowing out of the first channel 31 will all enter the heat exchange tube 9 connected to the second sub-chamber 132; if the first sub-chamber 131 and the second sub-chamber 132 are connected, a part of the refrigerant flowing out of the first channel 31 enters the heat exchange tube 9, and the other part will enter the first sub-chamber 131 driven by the gaseous refrigerant and mix again with the refrigerant in the first sub-chamber 131.

[0071] like Figure 2 As shown, in some embodiments, at least one third hole 32 is provided on the wall of the second tube 3, and the wall of the second tube 3 provided with the third hole 32 is located in the first cavity 12; an opening 33 is provided at at least one end of the second tube 3 along the length direction, and the first channel 31 is formed by connecting the third hole 32 and the opening 33 to the cavity of the second tube 3.

[0072] In this embodiment, the first channel 31 is formed by the third hole 32 and the opening 33 connecting the tube cavity of the second tube 3, and the third hole 32 is opened on the tube wall of the second tube 3, so that the refrigerant entering the first cavity 12 can enter the first channel 31 more, thereby increasing the mixing effect. Of course, the first channel 31 is not limited to being formed by the third hole 32 and an opening 33 located at the bottom end of the second tube 3, and can also be formed by the opening 33 located at the top end of the second tube 3, the third hole 32 and the opening 33 located at the bottom end of the second tube 3, which is not specifically limited here.

[0073] like Figure 3 As shown, in some embodiments, at least one third hole 32 and at least one fourth hole 34 are provided on the wall of the second tube 3, the wall of the second tube 3 provided with the third hole 32 is located in the first cavity 12, and the wall of the second tube 3 provided with the fourth hole 34 is located in the second sub-cavity 132, that is, at this time, the first channel 31 is formed by the third hole 32 and the fourth hole 34 connecting the tube cavity of the second tube 3. The refrigerant enters the tube cavity of the second tube 3 from the third hole 32, and then flows out from the fourth hole 34. The number of the third hole 32 and the fourth hole 34 can be the same or different. The number of the third hole 32 and the fourth hole 34 represents the preset amount of refrigerant entering the second tube 3 and the amount of refrigerant flowing out of the second tube 3. In actual application, it can be selected according to actual needs to increase the amount of refrigerant entering the second tube 3 or reduce the amount of refrigerant entering the second tube 3.

[0074] like Figure 3As shown, in some more specific embodiments, a plurality of slots 14 are provided on the wall of the first tube 1, and the plurality of slots 14 are arranged along the length direction of the first tube 1; the slots 14 are used to connect the heat exchange tubes 9, where the heat exchange tubes 9 may be flat tubes or round tubes, and in this embodiment, microchannel flat tubes are taken as an example.

[0075] At least part of the third hole 32 is located on the side of the second tube 3 away from the slot 14, and at least part of the fourth hole 34 is located on the side of the second tube 3 facing the slot 14. Since the third hole 32 is located in the first cavity 12, the refrigerant enters the first channel 31 from it. Therefore, the third hole 32 is arranged on the side of the second tube 3 away from the slot 14, which can reduce the amount of refrigerant entering the first channel 31 and prevent a large amount of refrigerant from entering the second tube 3. The fourth hole is located on the side of the second tube 3 facing the slot 14, so that after the refrigerant flows out from the fourth hole 34, it can more directly enter the heat exchange tube 9 connected with the second sub-cavity 132.

[0076] like Figure 3 As shown, in some embodiments, the number of the first hole 21 is one, and one end of the second tube 3 along the length direction passes through the first hole 21; there is a gap between the first hole 21 and the outer wall of the second tube 3. As mentioned above, the function of the first hole 21 is to connect the first cavity 12 and the second cavity 13, that is, to block the refrigerant to a certain extent while also accelerating the flow rate of the refrigerant. Therefore, the number and aperture of the first holes 21 should not be too many or too large. In this embodiment, the number of the first hole 21 is 1, which ensures that the second tube 3 can pass through while also having a certain gap with the outer wall of the second tube 3 for the refrigerant to pass through.

[0077] In some other embodiments (not shown), there may be multiple first holes 21. Of course, there may be a gap between the second tube 3 and the first hole 21, or there may be no gap, as long as there is at least one first hole 21 on the first plate 2 to connect the first cavity 12 and the second cavity 13, or the first cavity 12 and the first sub-cavity 131 of the second cavity 13, so it will not be described in detail.

[0078] like Figure 1 As shown, in some embodiments, in the vertical direction, the distance from the first inlet 4 to the bottom of the first tube 1 is defined as d1, and the shortest distance from one end of the second tube 3 along the length direction to the bottom of the first tube 1 is d2; then d1 and d2 satisfy: d1>d2. The bottom of the second tube 3 is lower than the first inlet 4, so that the refrigerant entering from the first inlet 4 can be effectively prevented from interfering with the refrigerant flowing out of the second tube 3.

[0079] like Figure 4-5As shown, in some embodiments, the header assembly further includes a third plate 6, which is at least partially located in the first cavity 12, and the third plate 6 divides the first cavity 12 into a third sub-cavity 121 and a fourth sub-cavity 122. In the vertical direction, the third sub-cavity 121 is located above the fourth sub-cavity 122;

[0080] The second tube 3 has a second passage 35 communicating with the third sub-cavity 121 and the fourth sub-cavity 122 .

[0081] In this embodiment, after the two-phase refrigerant enters the second chamber 13 or the first sub-chamber 131 of the second chamber 13 from the first inlet 4, the refrigerant will be separated into gas and liquid under the action of gravity, wherein a part of the refrigerant directly enters the heat exchange tube 9 connected to the second chamber 13 or the first sub-chamber 131 of the second chamber 13, and the other part of the refrigerant flows upward driven by the gaseous refrigerant. Of the refrigerant flowing upward, a part will enter the heat exchange tube 9 connected to the second chamber 13 or the first sub-chamber 131 of the second chamber 13 due to the barrier effect of the first plate 2, and the other part will enter the fourth sub-chamber 122 through the first hole 21 of the first plate 2. Of the refrigerant entering the fourth sub-chamber 122, a part will enter the heat exchange tube 9 connected to the fourth sub-chamber 122, and the other part will enter the second tube 3 through the third hole 32. Among the refrigerant entering the second tube 3, the gaseous refrigerant flows upward due to gas-liquid separation, and this part of the refrigerant flowing upward will enter the third sub-cavity 121 along the second channel 35, and then enter the heat exchange tube 9 connected to the third sub-cavity 121, and the liquid refrigerant flowing downward will circulate back to the second cavity 13 or the first sub-cavity 131 of the second cavity 13 along the first channel 31.

[0082] like Figure 4-5 As shown, in some more specific embodiments, the header assembly further includes a fourth plate 7, which is at least partially located in the second channel 35 of the second tube 3; the fourth plate 7 has at least one second hole 71, and the second hole 71 penetrates the fourth plate 7 along the thickness direction of the fourth plate 7. The fourth plate 7 is arranged in the second channel 35, so that the refrigerant flowing upward can be blocked, thereby reducing the amount of liquid refrigerant in the refrigerant flowing upward.

[0083] In this embodiment, under the multiple blocking effects of the first plate 2, the third plate 6 and the fourth plate 7, most of the refrigerant entering the third sub-chamber 121 will be gaseous (liquid refrigerant will flow downward due to gravity after multiple blocking), and the heat exchange capacity of this part of the gaseous refrigerant is relatively weak. Therefore, the length of the third sub-chamber 121 can be set shorter, that is, the number of heat exchange tubes 9 connected to the third sub-chamber 121 is reduced, sacrificing the heat exchange of this part, so that more liquid refrigerant is mixed in the refrigerant of other parts, thereby ensuring the heat exchange effect. Similarly, the first plate 2, the third plate 6 and the fourth plate 7 can not only block part of the refrigerant, but also spray the refrigerant, so that the refrigerant can be better mixed.

[0084] In addition, it should be pointed out that the second channel 35 can also be a plurality of holes, or a combination of the opening 33 and the holes. However, no matter what kind of combination is used, as long as it can connect the third sub-cavity 121 and the fourth sub-cavity 122, its specific structure can be similar to that of the first channel 31, so it will not be described in detail.

[0085] In some embodiments, the number of the third holes 32 is N, where N≥3; along the gravity direction, the flow cross-sectional area of ​​the first third hole 32 is defined as S1, and the flow cross-sectional area of ​​the Nth third hole 32 is defined as S N , there is an Xth third hole 32 between the first third hole 32 and the Nth third hole 32, and the flow cross-sectional area of ​​the Xth third hole 32 is S X ; then S1, S N and S X Satisfies: S1>S X >S N .

[0086] Take N=3 as an example, that is, the number of the third holes 32 is 3. At this time, the flow cross-sectional area of ​​the first third hole 32 closest to the top of the second tube 3 is S1, the flow cross-sectional area of ​​the second third hole 32 is S2, and the flow cross-sectional area of ​​the third third hole 32 is S3, then S1>S2>S3, that is, along the gravity direction, the flow cross-sectional area of ​​the third hole 32 gradually decreases from top to bottom. Therefore, the gas refrigerant will go up, and the third hole 32 is arranged in this way to ensure that the refrigerant entering the second tube 3 is mainly gas refrigerant.

[0087] like Figure 6-7As shown, according to another aspect of the present application, a heat exchanger is provided, the heat exchanger comprises: a header assembly and a third tube 8, a plurality of heat exchange tubes 9, the heat exchange tubes 9 connect the header assembly and the third tube 8, the header assembly is the header assembly of the first aspect, and fins 10, at least part of the fins 10 are arranged between two adjacent heat exchange tubes 9 in the length direction of the header assembly. After the two-phase refrigerant enters the header assembly, the gas-liquid mixture can be more evenly mixed and enter the connected heat exchange tubes 9, thereby giving full play to the heat exchange effect of the heat exchanger.

[0088] It should be noted that the manifold assembly can be any one of the manifold assemblies in the above embodiments. When the manifold of the heat exchanger has multiple parts, the multiple parts can be any one of the manifold assemblies in the above embodiments, or a combination of multiple manifold assemblies. In this embodiment, only one of the manifold assemblies and a combination of one manifold assembly are used for illustration.

[0089] like Figure 8 As shown, in some embodiments, the number of heat exchange tubes 9 connected to the first cavity 12 is defined as A1, and the number of heat exchange tubes 9 connected to the first sub-cavity 131 is defined as A2; then A1 and A2 satisfy: 1 / 3≤A1 / A2≤3. More specifically, the value of A1 can be less than A2 or greater than A2, and its specific number is determined according to the ratio of the first cavity 12 to the first sub-cavity 131, and the ratio of the first cavity 12 to the first sub-cavity 131 is determined by the distribution demand for the refrigerant during actual use. Generally speaking, the value of A1 is less than A2, that is, A1 and A2 satisfy: 1 / 3≤A1 / A2<1, but when the gas-liquid separation of the refrigerator is obvious and the refrigerant needs to be distributed through the first plate 2 in advance, A1 and A2 satisfy: 1≤A1 / A2≤3.

[0090] like Figure 8 As shown, in some more specific embodiments, the number of heat exchange tubes 9 communicating with the second sub-cavity 132 is defined as A3; then A1, A2 and A3 satisfy: 2≤A1+A2 / A3≤4.

[0091] By controlling the lengths of the first cavity 12, the second cavity 13, and the more detailed first sub-cavity 131, the second sub-cavity 132, the third sub-cavity 121 and the fourth sub-cavity 122, that is, controlling the number of heat exchange tubes 9 connected to each cavity, the amount of refrigerant flowing into each heat exchange tube 9 can be effectively guaranteed, thereby improving the heat exchange effect.

[0092] like Fig. 9As shown, according to the third aspect of the present application, the manifold assembly includes: a first tube 1, the first tube 1 has a first tube cavity 11, and the first tube cavity 11 extends along the length direction of the first tube 1; a first plate 2, the first plate 2 is at least partially located in the first tube cavity 11, the first plate 2 separates the first tube cavity 11 into a first cavity 12 and a second cavity 13, and the first cavity 12 and the second cavity 13 extend along the length direction of the first tube 1; a second plate 5 and a third plate 6, the second plate 5 and the third plate 6 separate the first cavity 12 into a first sub-cavity 131, a second sub-cavity 132 and a third sub-cavity 121, the first sub-cavity is connected to the second sub-cavity 132, and the second sub-cavity 132 is separated from the third sub-cavity 121; the first plate 2 has at least one first hole 21 and at least one second hole 71, the first hole 21 connects the first sub-cavity and the second cavity 13, and the second hole 71 connects the third sub-cavity 121 and the second cavity 13; a first inlet 4, the first inlet 4 is located in the first tube 1, and the first inlet 4 is connected to the second sub-cavity 132.

[0093] According to the third aspect of the present application, a manifold assembly of a heat exchanger is provided, in which a first plate 2, a second plate 5 and a third plate 6 are arranged in the first tube cavity 11 of the first tube 1 of the manifold assembly, the first plate 2 divides the first tube cavity 11 into a first cavity 12 and a second cavity 13, the second plate 5 and the third plate 6 divide the first cavity 12 into a first sub-cavity 131, a second sub-cavity 132 and a third sub-cavity 121, and the first sub-cavity 131 and the second cavity 13 are connected.

[0094] After the two-phase refrigerant enters the second sub-chamber 132 from the first inlet 4, gas-liquid separation will occur under the action of gravity, wherein the first part of the refrigerant enters the heat exchange tube 9 connected to the second sub-chamber 132, and the second part of the refrigerant enters the first sub-chamber. After entering the first sub-chamber, part of the refrigerant enters the heat exchange tube 9, and the other part will enter the second chamber 13 driven by the gaseous refrigerant, and finally enter the heat exchange tube 9 connected to the third sub-chamber 121 along the air flow direction. The second plate 5 has the effect of blocking the refrigerant on the one hand, and on the other hand, it has the effect of ejecting the refrigerant, so that the refrigerant can be mixed again after passing through the second plate 5. During the flow of the gaseous refrigerant, part of the liquid refrigerant will flow together, so that the excess gaseous refrigerant in the upper part is guided to the lower part, and part of the liquid refrigerant is brought in, so that the two-phase refrigerant can enter each heat exchange tube 9 in a gas-liquid mixed state, giving full play to the heat exchange effect of the heat exchange tube 9.

[0095] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A header assembly for a heat exchanger, characterized in that: include: A first tube, the first tube having a first lumen, the first lumen extending along the length direction of the first tube; A first plate, wherein the first plate is at least partially located in the first lumen, the first plate divides the first lumen into a first cavity and a second cavity, and the first plate has at least one first hole, the first hole connecting the first cavity and the second cavity; a second tube, wherein the second tube is at least partially located in the first tube cavity, the second tube extends along the length direction of the first tube, and the second tube has a first channel connecting the first cavity and the second cavity; A first inlet is located in the first tube, and the first inlet is communicated with the second cavity.

2. The header assembly of the heat exchanger according to claim 1, characterized in that: It also includes a second plate, which is at least partially located in the second cavity, and the second plate divides the second cavity into a first sub-cavity and a second sub-cavity. In the vertical direction, the first sub-cavity is located above the second sub-cavity; the first hole connects the first cavity and the first sub-cavity, the first channel connects the first cavity and the second sub-cavity, and the first inlet is connected to the first sub-cavity.

3. The header assembly of the heat exchanger according to claim 2, characterized in that: At least one third hole is provided on the wall of the second tube, and the wall of the second tube provided with the third hole is located in the first cavity; at least one end of the second tube along the length direction is provided with an opening, and the first channel is formed by the third hole and the opening connecting the cavity of the second tube.

4. The header assembly of the heat exchanger according to claim 2, characterized in that: At least one third hole and at least one fourth hole are arranged on the wall of the second tube; the wall of the second tube with the third hole is located in the first cavity; the wall of the second tube with the fourth hole is located in the second sub-cavity; the first channel is formed by the third hole and the fourth hole connecting the cavity of the second tube.

5. The header assembly of the heat exchanger according to claim 4, characterized in that: The wall of the first tube has a plurality of slots arranged along the length direction of the first tube; at least part of the third holes are located on the side of the second tube away from the slots, and at least part of the fourth holes are located on the side of the second tube facing the slots.

6. The header assembly of the heat exchanger according to claim 2, characterized in that: The number of the first hole is one, and one end of the second tube along the length direction passes through the first hole; there is a gap between the first hole and the outer wall of the second tube.

7. The header assembly of the heat exchanger according to claim 2, characterized in that: In the vertical direction, the distance from the first inlet to the bottom end of the first tube is defined as d1, and the shortest distance from one end of the second tube along the length direction to the bottom end of the first tube is d2; then d1 and d2 satisfy: d1>d2.

8. The header assembly of the heat exchanger according to any one of claims 2 to 7, characterized in that: The system further comprises a third plate, wherein the third plate is at least partially located in the first cavity, and the third plate divides the first cavity into a third sub-cavity and a fourth sub-cavity, and in the vertical direction, the third sub-cavity is located above the fourth sub-cavity; The second tube has a second passage communicating the third sub-cavity and the fourth sub-cavity.

9. The header assembly of the heat exchanger according to claim 8, characterized in that: It also includes a fourth plate, which is at least partially located in the second channel of the second tube; the fourth plate has at least one second hole, and the second hole penetrates the fourth plate along the thickness direction of the fourth plate.

10. The header assembly of the heat exchanger according to claim 4 or 5, characterized in that: The number of the third holes is N, where N≥3; In the gravity direction, the flow cross-sectional area of ​​the first third hole is defined as S1, and the flow cross-sectional area of ​​the Nth third hole is defined as S N There is an Xth third hole between the first third hole and the Nth third hole, and the flow cross-sectional area of ​​the Xth third hole is S X ; then S1, S N and S X Satisfies: S1>S X >S N .

11. A heat exchanger, characterized in that: include: A header assembly and a third tube, a plurality of heat exchange tubes, wherein the heat exchange tubes connect the header assembly and the third tube, and the header assembly is the header assembly described in any one of claims 2-10.

12. The heat exchanger according to claim 11, characterized in that Define the number of the heat exchange tubes communicating with the first cavity as A1, and the number of the heat exchange tubes communicating with the first sub-cavity as A2; then A1 and A2 satisfy: 1 / 3≤A1 / A2≤3.

13. The heat exchanger according to claim 12, characterized in that The number of the heat exchange tubes in communication with the second sub-cavity is defined as A3; then A1, A2 and A3 satisfy: 2≤A1+A2 / A3≤4.

14. A header assembly for a heat exchanger, characterized in that: include: A first tube, the first tube having a first lumen, the first lumen extending along the length direction of the first tube; A first plate, wherein the first plate is at least partially located in the first tube cavity, and the first plate divides the first tube cavity into a first cavity and a second cavity, and the first cavity and the second cavity extend along the length direction of the first tube; a second plate and a third plate, wherein the second plate and the third plate separate the first cavity into a first sub-cavity, a second sub-cavity and a third sub-cavity, the first sub-cavity is connected to the second sub-cavity, and the second sub-cavity is separated from the third sub-cavity; The first plate has at least one first hole and at least one second hole, the first hole connects the first sub-cavity and the second cavity, and the second hole connects the third sub-cavity and the second cavity; A first inlet is located in the first tube, and the first inlet is communicated with the second sub-cavity.

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