Plate heat exchangers

Abstract

Plate heat exchanger, characterized in that it comprises a heat exchanger body (10), wherein the heat exchanger body (10) comprises several heat exchanger plate sets (11) arranged one above the other, wherein the heat exchanger plate set (11) comprises a first heat exchanger plate (111) and a second heat exchanger plate (112), wherein the second heat exchanger plate (112) is arranged below the first heat exchanger plate (111), wherein a first heat exchanger channel (101) is formed between the first heat exchanger plate (111) and the second heat exchanger plate (112), wherein a first medium flows through the first heat exchanger channel (101); wherein both the first heat exchanger plate (111) and the second heat exchanger plate (112) are provided with liquid storage openings (113), wherein the liquid storage openings (113) of the multiple heat exchanger plate sets (11) are connected to each other and form a liquid storage channel (102), wherein the liquid storage channel (102) communicates with at least a part of the first heat exchanger channels (101); wherein the first heat exchanger plate (111) is provided with a first fold (1111) on the outer circumference of the liquid storage opening (113), wherein the second heat exchanger plate (112) is provided with a second fold (1121) on the outer circumference of the liquid storage opening (113), wherein the first fold (1111) is connected to the outer circumference of the second fold (1121) and forms the liquid storage chamber wall, wherein the liquid storage chamber walls of the several heat exchanger plate sets (11) are successively tightly connected.

Description

Technical field

[0001] The present utility model relates to the field of heat exchange technology, in particular a plate heat exchanger. Background technology

[0002] In conventional heat exchange systems, plate heat exchangers and liquid storage tanks are arranged separately, and the individual components must be connected by piping. This not only complicates the system layout but also increases the overall footprint of the system. Furthermore, sealing rings are typically used between plate heat exchangers and piping, as well as between liquid storage tanks and piping, which increases the risk of leaks in the system.

[0003] Based on this, an integrated heat exchanger with a built-in liquid storage tank is provided in the existing technology. This heat exchanger with integrated liquid storage tank incorporates a liquid storage unit, thus achieving a combination of storage and heat exchange. This leads to a reduction in the overall surface area of ​​the heat exchange system and eliminates the pipe connection between the heat exchanger and liquid storage tank, thereby resolving the problem of leaks at pipe connections due to seal failure. However, for sealing between two heat exchanger plates with a liquid storage channel, either a raised gasket or a D-shaped gasket in a groove can be used.With a raised seal, the sealing wall of the fluid storage channel is thin and the pressure resistance is limited; with a D-shaped seal in a groove, the connection point of the fluid storage channel to the plate with the groove is further narrowed, which also limits the pressure resistance. Both are unfavorable for the use of high-pressure heat exchangers.

[0004] Therefore, there is an urgent need for a plate heat exchanger to solve the aforementioned technical problems. Content of the utility model

[0005] The aim of this utility model is to provide a plate heat exchanger that simultaneously enables an integrated liquid storage function, increases the structural strength of the liquid storage channel without requiring cavities, and thus improves structural strength and pressure resistance.

[0006] To achieve the above-mentioned purpose, the utility model uses the following technical solutions: Plate heat exchanger comprising a heat exchanger body, wherein the heat exchanger body comprises several sets of heat exchange plates arranged one above the other, wherein the set of heat exchange plates comprises a first heat exchange plate and a second heat exchange plate, wherein the second heat exchange plate is arranged below the first heat exchange plate, wherein a first heat exchange channel is formed between the first heat exchange plate and the second heat exchange plate, wherein a first medium flows through the first heat exchange channel; wherein both the first heat exchanger plate and the second heat exchanger plate are provided with liquid storage openings, wherein the liquid storage openings of the multiple heat exchanger plate sets are interconnected and form a liquid storage channel, wherein the liquid storage channel communicates with at least a part of the first heat exchanger channels; wherein the first heat exchanger plate is provided with a first fold on the outer circumference of the liquid storage opening, wherein the second heat exchanger plate is provided with a second fold on the outer circumference of the liquid storage opening, wherein the first fold is connected to the outer circumference of the second fold and forms the liquid storage chamber wall, wherein the liquid storage chamber walls of the several heat exchanger plate sets are successively tightly connected.

[0007] Optionally, the fold size of the first fold is smaller than the fold size of the second fold, so that the outer surfaces of the first fold and the second fold of the heat exchanger plate set are arranged flush.

[0008] Optionally, the heat exchanger body comprises a first heat exchange section, a second heat exchange section, and a third heat exchange section, wherein the first heat exchange channel of the second heat exchange section is connected to the liquid storage channel, and wherein the first heat exchange channel of the third heat exchange section is connected to the liquid storage channel, such that the first medium flows successively through the first heat exchange channel of the first heat exchange section, the first heat exchange channel of the second heat exchange section, the liquid storage channel of the second heat exchange section, the liquid storage channel of the third heat exchange section, and the first heat exchange channel of the third heat exchange section.

[0009] Optionally, the heat exchanger plate set in the second heat exchange section and the heat exchanger plate set in the third heat exchange section can have the same structure and each be designed as a discharge plate set, wherein the second fold of the discharge plate set is provided with a discharge opening, the discharge opening being connected to the first heat exchange channel.

[0010] Optionally, a first deflection plate is arranged between the first heat exchange section and the second heat exchange section, with a second deflection plate being arranged between the second heat exchange section and the third heat exchange section.

[0011] Optionally, it further comprises a first inlet pipe and a first outlet pipe, wherein the heat exchanger plate set has a first heat exchanger inlet and a first heat exchanger outlet, wherein the first heat exchanger inlet and the first heat exchanger outlet are connected to the first heat exchanger channel, wherein the first heat exchanger inlet can be connected to the first inlet pipe and the first heat exchanger outlet can be connected to the first outlet pipe.

[0012] Optionally, a second heat exchange channel is formed between two adjacent heat exchanger plate sets, wherein a second medium flows through the second heat exchange channel, wherein the second heat exchange channel and the first heat exchange channel are independent of each other and the adjacently arranged second heat exchange channel and the first heat exchange channel are thermally connected.

[0013] Optionally, it further comprises a second inlet pipe and a second outlet pipe, wherein the heat exchanger plate set has a second heat exchanger inlet and a second heat exchanger outlet, wherein the second heat exchanger inlet and the second heat exchanger outlet are connected to the second heat exchanger channel, wherein the second heat exchanger inlet can be connected to the second inlet pipe and the second heat exchanger outlet can be connected to the second outlet pipe.

[0014] Optionally, a liquid storage drying structure is arranged in the liquid storage channel.

[0015] The shape of the fluid storage opening can optionally be elliptical or waist-shaped.

[0016] The utility model thus offers the following advantages: This utility model presents a plate heat exchanger integrated with a liquid storage channel, thereby reducing the overall surface area of ​​the heat exchange system and eliminating the pipe connection between the heat exchanger and the liquid storage, thus resolving the problem of leaks at pipe connections due to seal failure. Furthermore, the side wall of the liquid storage channel consists of multiple first folds and multiple second folds stacked on top of each other. This increases the thickness of the side wall of the liquid storage channel, improving its structural strength and pressure resistance. This, in turn, enhances the overall pressure resistance of the plate heat exchanger, enabling it to withstand higher-pressure media, reducing the risk of leaks, and improving the performance and reliability of the plate heat exchanger. Illustration of the attached figures Fig. Figure 1 shows an isometric view of the plate heat exchanger provided in a specific embodiment of the present utility model; Fig. Figure 2 shows a partial exploded view of the plate heat exchanger provided in a specific embodiment of the present utility model; Fig. Figure 3 shows a sectional view of the plate heat exchanger provided in a specific embodiment of the present utility model; Fig. Figure 4 shows a flow diagram of the first medium of the plate heat exchanger provided in a specific embodiment of the present utility model; Fig. Figure 5 shows an isometric view of the heat exchanger plate set provided in a specific embodiment of the present utility model; Fig. Figure 6 shows an isometric view of the first heat exchanger plate provided in a specific embodiment of the present utility model; Fig. Figure 7 shows an isometric view of the second heat exchanger plate provided in a specific embodiment of the present utility model; Fig. Figure 8 shows an isometric view of the derivation plate set provided in a specific embodiment of the present utility model; Fig. Figure 9 shows an isometric view of the derivative plate provided in a specific embodiment of the present utility model; Fig. Figure 10 shows an isometric view of the first deflection plate provided in a specific embodiment of the present utility model; Fig. Figure 11 shows an isometric view of the second deflection plate provided in a specific embodiment of the present utility model.

[0017] In the characters: 10. Heat exchanger body; 11. Heat exchanger plate set; 111. First heat exchanger plate; 1111. 1112. First fold; 112. Third fold; 112. Second heat exchanger plate; 1121. Second fold; 1122. Fourth fold; 113. Liquid storage opening; 114. First heat exchanger inlet; 115. First heat exchanger outlet; 116. Second heat exchanger inlet; 117. Second heat exchanger outlet; 12. Drain plate set; 121. Drain plate; 1211. Drain opening; 13. First deflector plate; 131. First shutter section; 14. Second deflection plate; 141. Second shutter section; 142. third closure section; 101. First heat exchange channel; 102. Liquid storage channel; 103. First channel; 104. Intermediate channel; 105. Second channel; 110. First heat exchange section; 120. Second heat exchange section; 130. Third heat exchange section; 20. First inlet; 30. First outlet; 40. Second inlet; 50. Second outlet; 60. First end plate; 70. Second end plate; 80. Channel plate; 90. Liquid storage drying structure; 91. Drying element; 92. Filter element; 93. 94. Cap; 95. Locking spring; 96. Sealing ring. Specific embodiments

[0018] The present utility model is described in more detail below with reference to the illustrations in the accompanying drawings and examples of embodiments. It is understood that the specific examples of embodiments described here serve only to explain the present utility model and do not constitute a limitation of it. It should also be noted that, for the sake of simplicity, the accompanying figures only show the parts related to the present utility model and not the entire structure.

[0019] When describing the utility model, it should be noted that the terms "connect," "connect," and "fasten" should be interpreted broadly unless expressly stated otherwise and limited. This could refer, for example, to a permanent connection, a detachable connection, a one-piece connection, a direct connection, an indirect connection via an intermediate medium, or a connection within two components. For a person skilled in the art, the specific meaning of the aforementioned terms in the context of the utility model is readily apparent in each individual case.

[0020] Unless expressly stated otherwise and limited, the first feature "above" or "below" the second feature of the utility model may include direct contact between the first and second features, or it may also include the first and second features coming into contact not directly, but through an additional feature. Furthermore, it includes the first feature being "above," "above," or "on" the second feature, the first feature being directly and diagonally above the second feature, or simply indicating that the first feature is horizontally higher than the second feature. The first feature being "below," "below," or "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply indicating that the first feature is horizontally lower than the second feature.

[0021] When describing the embodiment, it should be noted that the terms "top," "bottom," "left," "right," etc., refer to orientations or positions shown in the accompanying drawings. These terms are used solely to facilitate and simplify the description and are not intended to indicate or imply that the arrangement or component being referred to has a specific orientation or must be constructed and operated in a particular manner. Therefore, they are not to be understood as a limitation of the utility model. Furthermore, the terms "first" and "second" are used only for descriptive purposes and have no special meaning.

[0022] The plate heat exchanger provided in this utility model is described below with reference to the Fig. 1 to Fig. 11 explained.

[0023] With reference to Fig. 1 to Fig. Figure 7 of this embodiment represents a plate heat exchanger, wherein the plate heat exchanger comprises a heat exchanger body 10, wherein the heat exchanger body 10 comprises several heat exchanger plate sets 11 arranged one above the other, wherein the heat exchanger plate set 11 comprises a first heat exchanger plate 111 and a second heat exchanger plate 112, wherein the second heat exchanger plate 112 is arranged below the first heat exchanger plate 111, wherein a first heat exchanger channel 101 is formed between the first heat exchanger plate 111 and the second heat exchanger plate 112, wherein a first medium flows through the first heat exchanger channel 101;wherein both the first heat exchanger plate 111 and the second heat exchanger plate 112 are provided with liquid storage openings 113, wherein the liquid storage openings 113 of the multiple heat exchanger plate sets 11 are interconnected and form a liquid storage channel 102, the liquid storage channel 102 communicating with at least a portion of the first heat exchanger channels 101; wherein the first heat exchanger plate 111 is provided with a first fold 1111 on the outer circumference of the liquid storage opening 113, wherein the second heat exchanger plate 112 is provided with a second fold 1121 on the outer circumference of the liquid storage opening 113, the first fold 1111 being connected to the outer circumference of the second fold 1121 and forming the liquid storage chamber wall, the liquid storage chamber walls of the multiple heat exchanger plate sets 11 being successively tightly connected.

[0024] The plate heat exchanger according to the exemplary embodiment is integrated with a liquid storage channel 102, thereby reducing the overall surface area of ​​the heat exchange system and eliminating the pipe connection between the heat exchanger and the liquid storage, thus resolving the problem of leaks at pipe connections due to seal failure. Furthermore, the side wall of the liquid storage channel 102 consists of several first folds 1111 and several second folds 1121 stacked on top of each other. This increases the thickness of the side wall of the liquid storage channel 102, improving its structural strength and increasing its pressure resistance. This, in turn, increases the overall pressure resistance of the plate heat exchanger, enabling it to withstand higher-pressure media, reducing the risk of leaks, and improving the performance and reliability of the plate heat exchanger.

[0025] Optionally, the fold size of the first fold 1111 is smaller than the fold size of the second fold 1121, so that the outer surfaces of the first fold 1111 and the second fold 1121 of the heat exchange plate set 11 are arranged flat, which improves the stacking of the first heat exchange plate 111 and the second heat exchange plate 112.

[0026] Optionally, the first fold 1111 and the second fold 1121 can be joined by welding, so that the fluid storage channel 102 functions as a tightly sealed channel. The welded joint also increases the structural strength of the side wall of the fluid storage channel 102 and thereby improves its pressure resistance.

[0027] Optionally, the shape of the liquid storage opening 113 can be non-circular in order to reduce the space in the width direction of the liquid storage opening 113. This reduces the area of ​​the longitudinal flow region of the liquid storage channel 102, thereby increasing the area of ​​the other channels on the corresponding heat exchanger plate set 11 in the longitudinal flow region and reducing the flow resistance of the medium.

[0028] For example, the shape of the liquid storage opening 113 is elliptical or waist-shaped, and it has no edges, which promotes the flow of the medium and reduces the space in the transverse direction of the liquid storage opening 113. This reduces the area of ​​the longitudinal flow region of the liquid storage channel 102 and lowers the flow resistance of the medium in other flow channels.

[0029] To realize the connection between the liquid storage channel 102 and a part of the first heat exchange channel 101, with reference to Fig. 8 and Fig. 9. The heat exchange plate set 11, connected to the first heat exchange channel 101, is further arranged as a discharge plate set 12. In the discharge plate set 12, the second heat exchange plate 112 is configured as a discharge plate 121. The second groove 1121 of the discharge plate 121 is provided with a discharge opening 1211, the discharge opening 1211 being connected to the first heat exchange channel 101. Since the first heat exchange channel 101 is located between the first heat exchange plate 111 and the second heat exchange plate 112 within the same heat exchange plate set 11, the side wall separating the liquid storage channel 102 and part of the first heat exchange channel 101 within the first heat exchange channel 101 forms the second fold 1121. Therefore, a drain opening 1211 is provided at the second fold 1121 to establish the connection between the first heat exchange channel 101 and the liquid storage channel 102.

[0030] Optionally, the position of the drainage opening 1211 can be further determined according to actual requirements, without imposing any specific restrictions here.

[0031] Optionally, a second heat exchange channel is formed between two adjacent heat exchanger plate sets 11, such that the second heat exchange channel and the first heat exchange channel 101 are arranged crosswise one above the other, a second medium flows through the second heat exchange channel, the second heat exchange channel and the first heat exchange channel 101 are independent of each other and the adjacent second heat exchange channel and the first heat exchange channel 101 are thermally connected, thereby realizing the heat exchange between the two media of the plate heat exchanger.

[0032] Optionally, in the present embodiment, the first medium is a refrigerant and the second medium is a cooling liquid. The refrigerant must undergo liquid storage drying. Therefore, the first heat exchange channel 101 and the liquid storage channel 102 are connected to each other to implement the liquid storage drying of the first medium.

[0033] With reference to Fig. 1, Fig. 2, Fig. 5 and Fig. 7 The plate heat exchanger further comprises a first inlet pipe 20 and a first outlet pipe 30, wherein the heat exchanger plate set 11 has a first heat exchanger inlet 114 and a first heat exchanger outlet 115, the first heat exchanger inlet 114 and the first heat exchanger outlet 115 being connected to the first heat exchanger channel 101, wherein the first heat exchanger inlet 114 can be connected to the first inlet pipe 20 and the first heat exchanger outlet 115 can be connected to the first outlet pipe 30. The first inlet pipe 20 and the first outlet pipe 30 serve for the inflow and outflow of the first medium, that is, the first medium flows from the first inlet pipe 20 into the first heat exchanger inlet 114 of the corresponding heat exchanger plate set 11, then enters the first heat exchanger channel 101 and subsequently flows from the first heat exchanger outlet 115 to the first outlet pipe 30 and exits there.Naturally, if the plate heat exchanger has multiple outlets, several heat exchanger plate sets 11 are arranged in segments, with the first heat exchange channel 101 of each heat exchanger plate set 11 of the individual outlets connected in series. The first heat exchanger inlet 114 of the heat exchanger plate set 11 of the first outlet is connected to the first inlet pipe 20, and the first heat exchanger outlet 115 of the heat exchanger plate set 11 of the last outlet is connected to the first outlet pipe 30.

[0034] In other embodiments, the position of the liquid storage opening 113 can be determined according to the actual requirements, without imposing any specific restrictions here. Although in this embodiment the liquid storage opening 113 is arranged separately from the first heat exchanger inlet 114 and the first heat exchanger outlet 115, in other embodiments the liquid storage opening 113 can also be arranged together with the first heat exchanger inlet 114 or the first heat exchanger outlet 115 in the same opening to simplify the structure of the plate heat exchanger.

[0035] Furthermore, it comprises a second inlet pipe 40 and a second outlet pipe 50, wherein the heat exchanger plate assembly 11 has a second heat exchanger inlet 116 and a second heat exchanger outlet 117, the second heat exchanger inlet 116 and the second heat exchanger outlet 117 being connected to the second heat exchanger channel, the second heat exchanger inlet 116 being connected to the second inlet pipe 40 and the second heat exchanger outlet 117 being connected to the second outlet pipe 50. The second inlet pipe 40 and the second outlet pipe 50 serve for the inflow and outflow of the second medium, that is, the second medium flows from the second inlet pipe 40 into the second heat exchanger inlet 116 of the corresponding heat exchanger plate assembly 11, then enters the second heat exchanger channel and subsequently flows from the second heat exchanger outlet 117 to the second outlet pipe 50 and exits there.Naturally, if the plate heat exchanger has multiple outlets, several heat exchanger plate sets 11 are arranged in segments, with the second heat exchange channel of each heat exchanger plate set 11 of the individual outlets connected in series. The second heat exchanger inlet 116 of the heat exchanger plate set 11 of the first outlet is connected to the second inlet pipe 40, and the second heat exchanger outlet 117 of the heat exchanger plate set 11 of the last outlet is connected to the second outlet pipe 50.

[0036] Since in the heat exchanger plate set 11 both the first heat exchanger plate 111 and the second heat exchanger plate 112 are each equipped with a first heat exchanger inlet 114, a first heat exchanger outlet 115, a second heat exchanger inlet 116 and a second heat exchanger outlet 117, the mutual independence of the first heat exchanger channel 101 and the second heat exchanger channel is ensured.

[0037] In this embodiment, within the same heat exchanger plate set 11, a projection is arranged around the second heat exchanger inlet 116 on the side of the second heat exchanger plate 112 facing the first heat exchanger plate 111, and a projection is also arranged around the second heat exchanger outlet 117. The projection rests against the first heat exchanger plate 111, so that the corresponding first heat exchanger channel 101 is not connected to the second heat exchanger inlet 116 and the second heat exchanger outlet 117.

[0038] Likewise, within the same heat exchanger plate set 11, a projection is arranged around the first heat exchanger inlet 114 on the side of the first heat exchanger plate 111 facing away from the second heat exchanger plate 112, and a projection is also arranged around the first heat exchanger outlet 115. The projection rests against the second heat exchanger plate 112, so that the corresponding second heat exchanger channel is not connected to the first heat exchanger inlet 114 and the first heat exchanger outlet 115.

[0039] The above arrangement achieves the mutual independence of the first heat exchange channel 101 and the second heat exchange channel, so that the first medium and the second medium are independent of each other.

[0040] Optionally, a third fold 1112 is provided on the outer edge of the first heat exchanger plate 111 and a fourth fold 1122 on the outer edge of the second heat exchanger plate 112, the fourth fold 1122 being connected to the outer edge of the third fold 1112. This arrangement also increases the connection strength between the first heat exchanger plate 111 and the second heat exchanger plate 112 to ensure that the corresponding first heat exchanger channel 101 and the second heat exchanger channel can withstand media at higher pressures.

[0041] Optionally, the third fold 1112 and the fourth fold 1122 are joined by welding to ensure a tight connection between the first heat exchanger plate 111 and the second heat exchanger plate 112, as well as a tight connection between adjacent heat exchanger plate sets 11, thereby forming both the first heat exchanger channel 101 and the second heat exchanger channel as tight channels.

[0042] Optionally, several protrusions are arranged on both the first heat exchanger plate 111 and the second heat exchanger plate 112, with areas for media flow being formed between adjacent protrusions. The protrusions on the first heat exchanger plate 111 are located in different positions than the protrusions on the second heat exchanger plate 112, so that when several first heat exchanger plates 111 and several second heat exchanger plates 112 are successively stacked, the first heat exchanger channel 101 and the second heat exchanger channel are formed.

[0043] Optionally, the channel on the first heat exchanger plate 111 can have a V-shaped, W-shaped, point-shaped or internally finned design, with all shapes being suitable for shaping the channel without any specific restriction being imposed here.

[0044] Optionally, the first heat exchanger plate 111 and the second heat exchanger plate 112 are formed by stamping to facilitate the production and shaping of channels, holes and folds.

[0045] The plate heat exchanger further comprises a first end plate 60, a second end plate 70, and a channel plate 80, wherein the first end plate 60 is arranged on one side of the stacking direction of the heat exchanger body 10, while the channel plate 80 and the second end plate 70 are arranged successively on the opposite side of the stacking direction of the heat exchanger body 10 to ensure the fixation of the heat exchanger body 10 and the connection and fixation of the inner channels of the heat exchanger body 10 to the outer structure. In particular, the first inlet pipe 20 is attached to the second end plate 70, while the first outlet pipe 30, the second inlet pipe 40, and the second outlet pipe 50 are all attached to the first end plate 60.

[0046] In this embodiment, the flow of the heat exchanger body 10 can be adjusted according to the actual requirements, and the connection between the liquid storage channel 102 and the first heat exchange channel 101 can also be configured according to the actual requirements, without imposing any specific restrictions. For example, the flow can be divided into one, two, or three phases. In particular, the flow in this embodiment is divided into three sections.

[0047] With reference to Fig. 3 and Fig. 4 The heat exchanger body 10 comprises a first heat exchange section 110, a second heat exchange section 120 and a third heat exchange section 130, wherein the first heat exchange channel 101 of the second heat exchange section 120 is connected to the liquid storage channel 102, wherein the first heat exchange channel 101 of the third heat exchange section 130 is connected to the liquid storage channel 102, such that the first medium flows successively through the first heat exchange channel 101 of the first heat exchange section 110, the first heat exchange channel 101 of the second heat exchange section 120, the liquid storage channel 102 of the second heat exchange section 120, the liquid storage channel 102 of the third heat exchange section 130 and the first heat exchange channel 101 of the third heat exchange section 130.

[0048] In particular, the first heat exchanger section 110 connects its first heat exchanger inlet 114 to the first channel 103, whereby the first heat exchanger outlet 115 of the first heat exchanger section 110 and the first heat exchanger outlet 115 of the second heat exchanger section 120 connect and form the intermediate channel 104. The first heat exchanger outlets 115 of the third heat exchanger section 130 connect and form the second channel 105. That isThe first medium flows successively through the first inlet pipe 20, the first channel 103 and enters the first heat exchange channel 101 of the first heat exchange section 110; subsequently, it flows through the intermediate channel 104 and enters the first heat exchange channel 101 of the second heat exchange section 120, then it enters the liquid storage channel 102, is dried there in the liquid storage channel 102, flows through the first heat exchange channel 101 of the third heat exchange section 130 and finally flows successively through the second channel 105 and the first outlet pipe 30, thus realizing the flow of the first medium.This arrangement also creates a subcooling state, meaning that after heat exchange in the first heat exchange section 110 and in the second heat exchange section 120, drying and filtration take place via the liquid storage channel 102, followed by another heat exchange in the third heat exchange section 130, thereby achieving the subcooling effect and thus improving the heat exchange efficiency of the plate heat exchanger.

[0049] Of course, in other embodiments, the third heat exchange section 130, i.e., the subcooling section, can also be omitted, so that the liquid storage channel 102 is directly connected to the first outlet pipe 30. This means that after drying and filtering in the liquid storage channel 102 of the last heat exchange section, the first medium can communicate directly with the corresponding first outlet pipe 30, and thus there is no subcooling section. This can be adapted to the specific requirements.

[0050] Furthermore, in other embodiments, if the subcooling section is omitted, the liquid storage channel 102 can be directly connected to the first outlet pipe 30, and the first outlet pipe 30 can be located on the same side of the heat exchanger body 10 as the first inlet pipe 20. That is, the first medium flows in through the first inlet pipe 20 on the first side, flows to the second side into the liquid storage channel 102, completely fills this liquid storage channel 102, and then flows out of the first outlet pipe 30 on the first side. These can be designed adaptively according to actual requirements, which is why no specific limitations are imposed here.

[0051] In particular, the heat exchanger plate set 11 in the second heat exchange section 120 and the heat exchanger plate set 11 in the third heat exchange section 130 have the same structure and are each designed as a discharge plate set 12, wherein the second fold 1121 of the discharge plate set 12 is provided with a discharge opening 1211, the discharge opening 1211 being connected to the first heat exchange channel 101. This establishes a connection between the first heat exchange channel 101 and the liquid storage channel 102 in the second heat exchange section 120, as well as between the first heat exchange channel 101 and the liquid storage channel 102 in the third heat exchange section 130.

[0052] With reference to Fig. 2, Fig. 3, Fig. 10 and Fig. In particular, a first deflecting plate 13 is arranged between the first heat exchange section 110 and the second heat exchange section 120, and a second deflecting plate 14 is arranged between the second heat exchange section 120 and the third heat exchange section 130 to allow a change in the flow direction of the first medium.

[0053] The first deflector plate 13 is arranged between the heat exchanger plate set 11 of the first heat exchanger section 110 and the heat exchanger plate set 11 of the second heat exchanger section 120. Since the first heat exchanger outlet 115 of the first heat exchanger section 110 is connected to the first heat exchanger outlet 115 of the second heat exchanger section 120, but the first heat exchanger inlet 114 of the first heat exchanger section 110 is not connected to the first heat exchanger inlet 114 of the second heat exchanger section 120, a first closure section 131 is arranged at the position of the first heat exchanger inlet 114 of the first deflector plate 13 to ensure a closure between the first heat exchanger inlet 114 of the heat exchanger plate set 11 of the second heat exchanger section 120 and the second heat exchanger inlet 116 of the heat exchanger plate set 11 of the first heat exchanger section 110.

[0054] Similarly, the second deflector plate 14 is arranged between the heat exchanger plate set 11 of the second heat exchanger section 120 and the heat exchanger plate set 11 of the third heat exchanger section 130. Since the second heat exchanger section 120 and the third heat exchanger section 130 are connected via the liquid storage channel 102 and not via other channels, a second closure section 141 is provided at the position of the first heat exchanger inlet 114 of the second deflector plate 14, and a third closure section 142 is provided at the position of the second heat exchanger outlet 117 of the second deflector plate 14 to ensure a closure between the first heat exchanger channel of the heat exchanger plate set 11 of the second heat exchanger section 120 and the first heat exchanger channel of the heat exchanger plate set 11 of the third heat exchanger section 130, so that the connection is exclusively via the liquid storage channel 102.

[0055] Optionally, the remaining structures of the first deflection plate 13 and the second deflection plate 14 are identical to the first heat exchanger plate 111 or the second heat exchanger plate 112 to simplify the design of the deflection plates. A heat exchanger plate from the heat exchanger plate set 11 can be used directly between the individual process sections to close the corresponding connection port, thereby realizing the deflection function.

[0056] In this exemplary embodiment, the further structures of the first deflection plate 13 and the second deflection plate 14 are identical to the first heat exchange plate 111.

[0057] Optionally, in this embodiment, the second deflection plate 14 also serves as the interface between the filter element 92 and the drying element 91 of the liquid storage drying structure 90. To facilitate the connection between the two, a connection structure is attached to the liquid storage opening 113 of the second deflection plate 14.

[0058] Of course, in other embodiments the shut-off and deflection function of the first deflection plate 13 and the second deflection plate 14 can also be achieved by inserting blanking plates at the corresponding hole positions, without imposing any specific restriction here.

[0059] With reference to Fig.In this embodiment, a liquid storage drying structure 90 is arranged in the liquid storage channel 102, wherein the liquid storage drying structure 90 serves for drying filtration of the first medium.

[0060] In particular, the liquid storage drying structure 90 comprises a drying element 91 (e.g. a drying bag) and a filter element 92 (e.g. a filter screen), wherein the drying element 91 and the filter element 92 are arranged sequentially in the liquid storage channel 102 to ensure the drying and filtration of the first medium in the liquid storage channel 102.

[0061] Optionally, the first end plate 60 is also equipped with a mounting base, the mounting base having a through-hole that is connected to the liquid storage channel 102, wherein the drying element 91 and the filter element 92 are mounted through the through-hole of the mounting base in the liquid storage channel 102.

[0062] To ensure the sealing of the liquid storage channel 102, the liquid storage drying structure 90 also includes a sealing cap 93 and a retaining spring 94, wherein the sealing cap 93 is tightly connected to the through-hole, wherein the retaining spring 94 serves to secure the sealing cap 93 to the mounting base, thereby achieving a seal of the liquid storage channel 102.

[0063] Of course, in other embodiments, the fastening method of the closure cap 93 can also be achieved by attaching external threads to the closure cap 93 and providing the through hole with internal threads, whereby the external threads and internal threads are screwed together to achieve the fastening of the closure cap 93, without imposing any specific restriction here.

[0064] Optionally, a sealing ring 95 is arranged between the end cap 93 and the through hole of the mounting base to ensure a tight connection between the end cap 93 and the perforated wall of the through hole.

[0065] Obviously, the aforementioned embodiments of this utility model serve only to clarify the utility model and do not constitute a limitation of the embodiments of the utility model. For ordinary technicians in the relevant field, it is possible to make various obvious modifications, adaptations, and substitutions without exceeding the scope of protection of this utility model. There is neither the need nor the possibility to exhaust all embodiments here. Any modifications, equivalent substitutions, or improvements made in the spirit and according to the principles of this utility model are included within the scope of protection of the claims of this utility model.

Claims

[1] Plate heat exchangers, characterized by , that it comprises a heat exchanger body (10), wherein the heat exchanger body (10) comprises several heat exchanger plate sets (11) arranged one above the other, wherein the heat exchanger plate set (11) comprises a first heat exchanger plate (111) and a second heat exchanger plate (112), wherein the second heat exchanger plate (112) is arranged below the first heat exchanger plate (111), wherein a first heat exchanger channel (101) is formed between the first heat exchanger plate (111) and the second heat exchanger plate (112), wherein a first medium flows through the first heat exchanger channel (101); wherein both the first heat exchanger plate (111) and the second heat exchanger plate (112) are provided with liquid storage openings (113), wherein the liquid storage openings (113) of the multiple heat exchanger plate sets (11) are connected to each other and form a liquid storage channel (102), wherein the liquid storage channel (102) communicates with at least a part of the first heat exchanger channels (101); wherein the first heat exchanger plate (111) is provided with a first fold (1111) on the outer circumference of the liquid storage opening (113), wherein the second heat exchanger plate (112) is provided with a second fold (1121) on the outer circumference of the liquid storage opening (113), wherein the first fold (1111) is connected to the outer circumference of the second fold (1121) and forms the liquid storage chamber wall, wherein the liquid storage chamber walls of the several heat exchanger plate sets (11) are successively tightly connected. [2] Plate heat exchanger according to claim 1, characterized by , that the fold size of the first fold (1111) is smaller than the fold size of the second fold (1121), so that the outer surfaces of the first fold (1111) and the second fold (1121) of the heat exchanger plate set (11) are arranged in a planar manner. [3] Plate heat exchanger according to claim 1, characterized by, that the heat exchanger body (10) comprises a first heat exchange section (110), a second heat exchange section (120) and a third heat exchange section (130), wherein the first heat exchange channel (101) of the second heat exchange section (120) is connected to the liquid storage channel (102), wherein the first heat exchange channel (101) of the third heat exchange section (130) is connected to the liquid storage channel (102), such that the first medium flows successively through the first heat exchange channel (101) of the first heat exchange section (110), the first heat exchange channel (101) of the second heat exchange section (120), the liquid storage channel (102) of the second heat exchange section (120), the liquid storage channel (102) of the third heat exchange section (130) and the first heat exchange channel (101) of the third heat exchange section (130). [4] Plate heat exchanger according to claim 3, characterized by, that the heat exchange plate set (11) in the second heat exchange section (120) and the heat exchange plate set (11) in the third heat exchange section (130) have the same structure and are each designed as a discharge plate set (12), wherein the second fold (1121) of the discharge plate set (12) is provided with a discharge opening (1211), wherein the discharge opening (1211) is connected to the first heat exchange channel (101). [5] Plate heat exchanger according to claim 3, characterized by , that a first deflecting plate (13) is arranged between the first heat exchange section (110) and the second heat exchange section (120), wherein a second deflecting plate (14) is arranged between the second heat exchange section (120) and the third heat exchange section (130). [6] Plate heat exchanger according to claim 1, characterized by, that it further comprises a first inlet pipe (20) and a first outlet pipe (30), wherein the heat exchanger plate set (11) has a first heat exchanger inlet (114) and a first heat exchanger outlet (115), wherein the first heat exchanger inlet (114) and the first heat exchanger outlet (115) are connected to the first heat exchanger channel (101), wherein the first heat exchanger inlet (114) can be connected to the first inlet pipe (20) and the first heat exchanger outlet (115) can be connected to the first outlet pipe (30). [7] Plate heat exchanger according to claim 1, characterized by , that a second heat exchange channel is formed between two adjacent heat exchange plate sets (11), wherein a second medium flows through the second heat exchange channel, wherein the second heat exchange channel and the first heat exchange channel (101) are independent of each other and the adjacently arranged second heat exchange channel and the first heat exchange channel (101) are thermally connected. [8] Plate heat exchanger according to claim 7, characterized by , that it further comprises a second inlet pipe (40) and a second outlet pipe (50), wherein the heat exchanger plate set (11) has a second heat exchanger inlet (116) and a second heat exchanger outlet (117), wherein the second heat exchanger inlet (116) and the second heat exchanger outlet (117) are connected to the second heat exchanger channel, wherein the second heat exchanger inlet (116) can be connected to the second inlet pipe (40) and the second heat exchanger outlet (117) can be connected to the second outlet pipe (50). [9] Plate heat exchanger according to any one of claims 1-8, characterized by , that a liquid storage drying structure (90) is arranged in the liquid storage channel (102). [10] Plate heat exchanger according to any one of claims 1-8, characterized by , that the shape of the fluid storage opening (113) is elliptical or waist-shaped.

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