Small plate heat exchanger

Abstract

This utility model provides a small plate heat exchanger, relating to the field of heat exchanger technology. It includes a frame and plates, the frame comprising a front frame and a rear frame. A connecting pipe is installed within each plate between the front and rear frames. The connecting pipe includes an upper connecting pipe and a lower connecting pipe, located at opposite ends of the short side of the same plate. Each of the upper and lower connecting pipes has several grooves at corresponding ends. These grooves are staggered and communicate with the flow channels of adjacent plates, allowing the flow channels of adjacent plates to form alternating flow paths. The groove design effectively isolates the medium from the heat exchanger, significantly improving its sealing performance, effectively preventing medium crossflow, and extending its service life. It not only ensures the smooth flow of the original flow channels but also further enhances the isolation effect between hot and cold media through physical isolation.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to small plate heat exchangers. Background Technology

[0002] Existing small plate heat exchangers use alternating hot and cold media, form flow channels by inverted installation, and rely on sealing gaskets to isolate the media and avoid cross-flow.

[0003] However, in practical applications, since small heat exchangers mainly rely on gaskets for sealing, after long-term use, the gaskets are prone to losing their sealing performance due to aging and wear, which leads to the occurrence of medium crossflow. This problem is more prominent when the device is operating under overload conditions, which seriously affects the reliability and service life of the heat exchanger. Therefore, we propose a small plate heat exchanger. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by improving the connection structure of the hot and cold plates and adding a new sealing structure on the basis of the sealing gasket, thereby ensuring the original flow channel while preventing media crossflow.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a small plate heat exchanger, comprising a frame and plates, wherein inlet and outlet interfaces are installed near the corners of one side of the frame, and the plates are provided with connecting ports corresponding to the inlet and outlet interfaces. A flow channel is provided on one end face of the plates, and two connecting ports on one side of the plates are provided with connecting parts. Several connecting parts of the plates are staggered and stacked and welded between the frames. The frame includes a front frame and a rear frame.

[0006] A connecting pipe is installed inside the plate between the front frame and the rear frame. The connecting pipe includes an upper connecting pipe and a lower connecting pipe, which are located at both ends of the short side of the plate on the same side.

[0007] The upper and lower connecting pipes each have several pipe grooves at their corresponding ends. The pipe grooves are staggered and connected to the flow channels of adjacent plates at intervals, so that the flow channels of adjacent plates form alternating flow paths through the pipe grooves.

[0008] Furthermore, the inlet and outlet interfaces include an inlet interface and an outlet interface, which are arranged along the same long side and are used to connect to hot and cold media respectively.

[0009] Furthermore, the mating part is equipped with a sealing gasket, and the mating part is attached to the back of the adjacent plate.

[0010] Furthermore, the inner sides of both the front and rear frames are provided with plate welding grooves for the plates embedded in the plate welding grooves to be snapped and welded. The inner sides of the front and rear frames are also provided with holes and slots, and a sealing gasket is provided in the hole and slot of the front frame.

[0011] Furthermore, one end of the upper connecting pipe and the lower connecting pipe is built into the groove of the front frame and abuts against the sealing gasket. After being deformed by pressure, they form a seal with the end of the upper connecting pipe / lower connecting pipe. The other end abuts against the groove of the rear frame and is welded and fixed.

[0012] Furthermore, the inner diameter of the connecting port is adapted to the outer diameter of the connecting pipe.

[0013] Furthermore, the tube groove is connected to the flow channel.

[0014] Furthermore, the inlet and outlet are respectively connected to the upper and lower connecting pipes along the same long side, and are connected to the spaced flow channels through the pipe groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In this utility model, the small plate heat exchanger has the following beneficial effects:

[0017] By adding upper and lower connecting pipes to the existing sealing gaskets and creating staggered pipe grooves on them, the flow channels of adjacent plates can form alternating flow paths. This design not only ensures the smooth flow of the original flow channels, but also, as a new sealing structure in conjunction with the sealing gaskets, ensures that the sealing between adjacent plates is not just achieved through the sealing gaskets. The design of the pipe grooves effectively blocks the medium by the connecting pipes, significantly improving the sealing performance of the heat exchanger, effectively preventing the occurrence of medium crossflow, and extending the service life of the heat exchanger. It not only ensures the smooth flow of the original flow channels, but also further enhances the isolation effect between hot and cold media through physical isolation.

[0018] In summary, the small plate heat exchanger of this utility model significantly improves the sealing performance and heat exchange efficiency of the heat exchanger by improving the connection structure of the hot and cold plates and the flow channel design, while also enhancing the stability and adaptability of the structure. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of the small plate heat exchanger provided by this utility model;

[0020] Figure 2 A disassembled schematic diagram of the overall structure of the small plate heat exchanger provided by this utility model;

[0021] Figure 3 A schematic diagram of the front frame structure of the small plate heat exchanger provided by this utility model;

[0022] Figure 4 A schematic diagram of the connecting pipe structure of the small plate heat exchanger provided by this utility model.

[0023] Legend: 1. Frame; 11. Front frame; 12. Rear frame; 13. Plate welding groove; 14. Hole groove; 15. Sealing gasket;

[0024] 2. Plate; 21. Flow channel; 22. Joint; 221. Sealing gasket;

[0025] 3. Import / export interface; 31. Inlet interface; 32. Outlet interface;

[0026] 4. Connecting port;

[0027] 5. Connecting pipe; 51. Upper connecting pipe; 52. Lower connecting pipe; 53. Pipe groove. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example 1

[0032] like Figure 1-4 As shown, this utility model provides a technical solution: a small plate heat exchanger, including a frame 1 and plates 2. Inlet and outlet interfaces 3 are installed near the corners of one side of the frame 1. These interfaces are used for the entry and exit of the medium. The plates 2 are provided with connecting ports 4 corresponding to the inlet and outlet interfaces 3 to ensure that the medium can flow smoothly into and out of the plates 2. One end face of the plates 2 is provided with flow channels 21. These flow channels 21 are the main places for the medium to exchange heat. Two connecting ports 4 on the long side of one side of the plates 2 are provided with connecting parts 22 for connecting and sealing between the plates 2. Multiple plates 2 are arranged and stacked in an alternating manner through the connecting parts 22 and welded between the frames 1 to form a stable heat exchanger structure. The frame 1 includes a front frame 11 and a rear frame 12, which provide support and fixation for the plates 2.

[0033] Inside the plate 2, between the front frame 11 and the rear frame 12, a connecting pipe 5 is installed. The connecting pipe 5 includes an upper connecting pipe 51 and a lower connecting pipe 52, which are located at both ends of the short side on the same side of the plate 2. The corresponding ends of the upper connecting pipe 51 and the lower connecting pipe 52 are provided with several pipe grooves 53. These pipe grooves 53 are staggered and communicate with the flow channels 21 of the adjacent plates 2 at intervals. This design allows the flow channels 21 of the adjacent plates 2 to form an alternating flow path through the pipe grooves 53, which enhances the heat exchange effect and improves the sealing performance. Example 2

[0034] like Figure 1-4 As shown, the inlet and outlet interfaces 3 are further subdivided into inlet interface 31 and outlet interface 32, which are arranged along the long side of the same side and are used to connect the supply and discharge pipes of hot and cold media, respectively. A sealing gasket 221 is installed on the mating part 22, and the mating part 22 is tightly attached to the back of the adjacent plate 2 to ensure the sealing between the plates 2.

[0035] Both the front frame 11 and the rear frame 12 have plate welding grooves 13 on their inner sides. These grooves are used to house the plates 2 and perform snap welding, which enhances the connection strength between the plates 2 and the frame 1. At the same time, the front frame 11 and the rear frame 12 also have holes 14 on their inner sides for installing and fixing the connecting pipes 5. The holes 14 of the front frame 11 are provided with sealing gaskets 15. When one end of the upper connecting pipe 51 and the lower connecting pipe 52 is housed in the holes 14, they will abut against the sealing gaskets 15. After being deformed by pressure, they will form a tight seal with the ends of the upper connecting pipe 51 / lower connecting pipe 52 to prevent media leakage.

[0036] The other ends of the upper connecting pipe 51 and the lower connecting pipe 52 abut against the slot 14 of the rear frame 12 and are fixed by welding to ensure the stability and sealing of the connecting pipe 5. The inner diameter of the connecting port 4 is matched with the outer diameter of the connecting pipe 5 to ensure that the medium cooperates with the sealing gasket 15 to seal the flow channel 21 of the adjacent plate 2 at intervals. The pipe groove 53 is connected to the flow channel 21, so that the medium can flow freely between the flow channel 21 and the pipe groove 53.

[0037] The inlet port 31 and outlet port 32 are respectively connected to the upper connecting pipe 51 and the lower connecting pipe 52 on the same long side, and are connected to the spaced flow channel 21 through the pipe groove 53, forming a complete medium flow path.

[0038] The working process of this utility model is as follows: When using a small plate heat exchanger, firstly, the inlet port 31 and the outlet port 32 are connected to the supply pipe and discharge pipe of the hot and cold medium respectively according to actual needs, and ensure that the connection is tight and leak-free. Then, the hot and cold medium supply system is started, so that the medium flows into the upper connecting pipe 51 through the inlet port 31, and then enters the flow channel 21 of the adjacent plate 2 through the pipe groove 53 for heat exchange. After heat exchange, the medium flows into the lower connecting pipe 52 through the pipe groove 53 on the other side, and finally is discharged from the outlet port 32.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small plate heat exchanger, comprising a frame (1) and plates (2), wherein each side of the frame (1) is provided with an inlet / outlet interface (3) near a corner, and the plates (2) are provided with connecting ports (4) corresponding to the inlet / outlet interfaces (3), and one end face of the plates (2) is provided with a flow channel (21), and two connecting ports (4) on one side of the plates (2) are provided with connecting parts (22), and the plates (2) have several connecting parts (22) arranged alternately and stacked and welded between the frames (1), characterized in that: The frame (1) includes a front frame (11) and a rear frame (12). A connecting pipe (5) is installed inside the plate (2) between the front frame (11) and the rear frame (12). The connecting pipe (5) includes an upper connecting pipe (51) and a lower connecting pipe (52). The upper connecting pipe (51) and the lower connecting pipe (52) are located at both ends of the short side on the same side of the plate (2). The upper connecting pipe (51) and the lower connecting pipe (52) are provided with a number of pipe grooves (53) at their corresponding ends. The pipe grooves (53) are staggered and are connected to the flow channels (21) of the adjacent plates (2) at intervals, so that the flow channels (21) of the adjacent plates (2) form an alternating flow path through the pipe grooves (53).

2. A compact plate heat exchanger according to claim 1, characterized in that: The inlet and outlet interfaces (3) include an inlet interface (31) and an outlet interface (32), which are arranged on the same long side and are used to connect to hot and cold media respectively.

3. The compact plate heat exchanger according to claim 1, characterized in that: The mating part (22) is fitted with a sealing gasket (221), and the mating part (22) is attached to the back of the adjacent plate (2).

4. The compact plate heat exchanger according to claim 1, characterized in that: The inner sides of the front frame (11) and the rear frame (12) are provided with plate welding grooves (13) for the plate (2) embedded in the plate welding grooves (13) to be snapped and welded. The inner sides of the front frame (11) and the rear frame (12) are also provided with holes (14), and the holes (14) of the front frame (11) are provided with sealing gaskets (15).

5. The compact plate heat exchanger according to claim 4, characterized in that: One end of the upper connecting pipe (51) and the lower connecting pipe (52) are built into the slot (14) of the front frame (11) and abut against the sealing gasket (15). After being deformed by pressure, they form a seal with the ends of the upper connecting pipe (51) and the lower connecting pipe (52). The other end abuts against the slot (14) of the rear frame (12) and is welded and fixed.

6. The compact plate heat exchanger according to claim 1, characterized in that: The inner diameter of the connecting port (4) is compatible with the outer diameter of the connecting pipe (5).

7. The compact plate heat exchanger according to claim 1, characterized in that: The tube (53) is connected to the flow channel (21).

8. The compact plate heat exchanger according to claim 2, characterized in that: The inlet (31) and outlet (32) are respectively connected to the upper connecting pipe (51) and the lower connecting pipe (52) on the same long side, and are connected to the spaced flow channels (21) through the pipe groove (53).

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