Heat exchanger with box type structure

Abstract

The utility model discloses a heat exchanger with a box type structure, which comprises a heat exchange tube assembly and a main body shell, a heat exchange space is formed in the main body shell, a plurality of partition baffle plates are arranged in the heat exchange space, the partition baffle plates are arranged in the heat exchange space to form a snakelike folded closed secondary refrigerant flow channel, and the heat exchange tube assembly comprises at least one group of heat exchange tubes. The heat exchange pipe is located in the closed secondary refrigerant flow channel in a matched mode, a secondary refrigerant can only flow along the closed secondary refrigerant flow channel after entering the heat exchange space, heat exchange is achieved between the secondary refrigerant and the heat exchange pipe, and due to the appearance of the heat exchanger of the box type structure, compared with a cylindrical heat exchanger, the heat exchanger of the box type structure has the larger space utilization rate. According to the heat exchanger, the multiple partition baffle plates arranged in the heat exchange space can form the closed secondary refrigerant flow channels in the heat exchange space, the closed secondary refrigerant flow channels enable secondary refrigerants to only flow in the closed secondary refrigerant flow channels, the problem that the secondary refrigerants cannot conduct sufficient heat exchange with the heat exchange pipes due to bypasses is solved, and therefore the heat exchange performance of the heat exchanger is effectively ensured.

Description

Technical Field

[0001] The utility model relates to a heat exchanger with a box-type structure. Background Art

[0002] In the field of HVAC equipment, floor heating air conditioners, hot water air conditioners, etc. mostly use coaxial tube heat exchangers or high-efficiency barrel heat exchangers such as those described in the patent document of Chinese Patent Publication No. CN218410347U. The appearance of such heat exchangers is cylindrical. In the limited outdoor unit space, the cylindrical heat exchanger wastes a lot of effective space size, so it is necessary to propose a heat exchanger with greater space utilization;

[0003] Among the existing heat exchangers, the horizontal shell and tube heat exchanger has a relatively higher space utilization rate. However, there is a certain gap between the baffle and the inner cavity of the shell of the horizontal shell and tube heat exchanger, and between the heat exchange tube and the baffle, which leads to the formation of bypass and flow path inside, making it impossible for the refrigerant to fully realize heat exchange, resulting in its low heat exchange performance. Utility Model Content

[0004] The utility model aims to provide a technical solution of a heat exchanger with a box-type structure to address the deficiencies in the prior art, which can not only obtain a relatively greater space utilization rate but also effectively ensure the heat exchange performance.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A box-type heat exchanger comprising

[0007] Heat exchange tube assembly, used to transmit refrigerant so that it can achieve heat exchange with the refrigerant;

[0008] The main body shell has a heat exchange space formed inside the main body shell, and the heat exchange tube assembly can achieve heat exchange with the coolant in the heat exchange space;

[0009] A number of partition baffles are arranged in the heat exchange space to form a serpentine closed refrigerant flow channel. The heat exchange tube assembly includes at least one group of heat exchange tubes, which are arranged in the closed refrigerant flow channel. After the refrigerant enters the heat exchange space, it can only flow along the closed refrigerant flow channel and realize heat exchange with the heat exchange tubes.

[0010] By adopting the above technical solution, the box-type heat exchanger can have a greater space utilization rate than a cylindrical heat exchanger due to its outer shape. Several partition baffles arranged in the heat exchange space can form a closed refrigerant flow channel in the heat exchange space. The closed refrigerant flow channel allows the refrigerant to flow only along the inside, avoiding the problem of bypass that prevents the refrigerant from fully exchanging heat with the heat exchange tubes, thereby effectively ensuring the heat exchange performance of the heat exchanger.

[0011] Furthermore, the heat exchange tube assembly includes a refrigerant collecting pipe and a refrigerant liquid inlet pipe, which are respectively connected to both ends of the heat exchange tube. The refrigerant collecting pipe is used for the output of the refrigerant, and the refrigerant liquid inlet pipe is used for the input of the refrigerant.

[0012] Furthermore, one side edge of the partition baffle is separated from the inner wall of the main shell to form a flow channel, and the other three side edges of the partition baffle are welded to the inner wall of the main shell, and the coolant cannot pass through the welding point between the two.

[0013] Furthermore, a flange structure is formed on the side of the partition baffle, and the flange structure is used to increase the contact area between the partition baffle and the inner wall of the main shell, and the flange structure is welded to the inner wall of the main shell.

[0014] Furthermore, a bridge support plate is formed between the partition baffle plate and the heat exchange tube, and the bridge support plate is used to support and fix the heat exchange tube above it.

[0015] Furthermore, a liquid inlet channel and a liquid outlet channel are provided on the side of the main shell, and the liquid inlet channel and the liquid outlet channel are respectively connected to the two ends of the closed coolant flow channel.

[0016] Furthermore, a diffusion structure is connected between the liquid inlet channel and the main body shell.

[0017] Furthermore, a current collecting structure is connected between the liquid outlet channel and the main body shell.

[0018] Furthermore, the main body shell is a rectangular shell.

[0019] Furthermore, the main body shell is composed of a top plate, a bottom plate and surrounding side plates, and the top plate, the bottom plate and the side plates are sealed and connected by welding.

[0020] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0021] 1. The utility model can not only obtain a relatively greater space utilization rate, but also effectively ensure the heat exchange performance of the heat exchanger;

[0022] 2. The partition baffle of the utility model increases the contact area with the inner wall of the main shell through the flange structure, thereby improving the connection stability of the partition baffle in the heat exchange space;

[0023] 3. The liquid inlet channel of the utility model is located below the liquid outlet channel, and the coolant performs reverse heat exchange from bottom to top, which can effectively improve the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the external structure of the heat exchanger of the cassette structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the cassette-type heat exchanger of the utility model in a top view;

[0027] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0028] Figure 4 This is a schematic diagram of the structure of the box-type heat exchanger of the utility model when the top plate is removed, viewed from above;

[0029] Figure 5 This is a schematic diagram of the rear view of the heat exchanger of the cassette structure of the utility model;

[0030] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of the middle BB;

[0031] Figure 7 This is a schematic diagram of the structure of the heat exchange tube assembly of the utility model;

[0032] Figure 8 This is a schematic diagram of the structure of the box-type heat exchanger of the utility model after the top plate and the front side plate are removed;

[0033] Fig. 9 This is a schematic diagram of the structure of the partition baffle of the utility model;

[0034] Fig.10 This is a schematic diagram of the structure of the heat exchange tube assembly of the utility model placed in the main body shell;

[0035] In the figure: 1-main body shell; 11-top plate; 12-bottom plate; 13-front side plate; 14-back side plate; 15-side plate; 16-heat exchange space;

[0036] 2-heat exchange tube assembly; 21-heat exchange tube; 22-refrigerant gas collecting pipe; 23-refrigerant liquid inlet pipe;

[0037] 3-dividing baffle; 31-enclosed coolant flow channel; 32-flanging structure; 33-bridge support plate;

[0038] 4-liquid inlet channel; 41-diffusion structure; 5-liquid outlet channel; 51-current collecting structure. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0042] Example 1

[0043] In the HVAC equipment industry, the heat exchange on the water side of 3-16 HP (7-40 kW) floor heating air conditioners, hot water air conditioners, etc. mostly uses coaxial shell and tube heat exchangers, high-efficiency barrel heat exchangers and other heat exchange equipment;

[0044] Coaxial tube heat exchangers, high-efficiency barrel heat exchangers and other equipment are cylindrical in shape. In the limited outdoor unit space, the cylindrical heat exchanger wastes a lot of effective space size;

[0045] The box-shaped heat exchanger proposed in the utility model can achieve a relatively greater space utilization rate compared to a cylindrical heat exchange device;

[0046] The heat exchanger of the box-type structure comprises a main body shell 1;

[0047] In this embodiment, the main housing 1 is a rectangular housing. Figure 1 As shown;

[0048] The main shell 1 is configured as a rectangular shell, which can effectively improve the space utilization of the heat exchanger.

[0049] The main housing 1 is composed of a top plate 11, a bottom plate 12 and surrounding side plates. Figure 1 to Figure 3 As shown;

[0050] The top plate 11, the bottom plate 12 and the surrounding side plates are connected by welding to form a closed box body, and a heat exchange space 16 is formed in the box body. The coolant can achieve heat exchange in the heat exchange space 16;

[0051] The side panels around the periphery include a front side panel 13, a back side panel 14 and side panels 15 on both sides. Figure 1 to Figure 3 As shown;

[0052] The heat exchanger includes a heat exchange tube assembly 2, such as Figure 7 , Figure 8 As shown;

[0053] The heat exchange tube assembly 2 includes a plurality of heat exchange tubes 21 and a refrigerant gas collecting pipe 22 and a refrigerant liquid inlet pipe 23 respectively connected to both ends of the heat exchange tubes 21. Figure 7 As shown;

[0054] The heat exchange tube 21 is located in the heat exchange space 16 formed by the main shell 1. Figure 8 , Fig.10 As shown;

[0055] One end of each of the refrigerant gas collecting pipe 22 and the refrigerant liquid inlet pipe 23 passes through one side of the main shell 1;

[0056] In this embodiment, one end of each of the refrigerant gas collecting pipe 22 and the refrigerant liquid inlet pipe 23 passes through the front side plate 13 to achieve connection with external equipment, such as Figure 1 As shown;

[0057] After the heat exchange tube assembly 2 and the main shell 1 are assembled, they are sealed by welding, that is, the joints between the refrigerant collecting pipe 22 and the refrigerant liquid inlet pipe 23 and the front side plate 13 are welded and sealed, so that the main shell 1 can withstand the working pressure and test pressure of the refrigerant;

[0058] In this embodiment, the heat exchange tube 21 is a serpentine U-shaped heat exchange tube;

[0059] In this embodiment, the heat exchange tubes 21 are arranged and distributed along the axial direction of the refrigerant collecting pipe 22. Figure 7 As shown;

[0060] In this embodiment, both ends of the heat exchange tube 21 are connected to the refrigerant gas collecting pipe 22 and the refrigerant liquid inlet pipe 23 respectively, and the three joints are connected by brazing;

[0061] In this embodiment, the coolant is water.

[0062] The heat exchanger comprises a liquid inlet channel 4 and a liquid outlet channel 5, which are arranged on one side of the main shell 1 and communicate with the heat exchange space 16;

[0063] The liquid inlet channel 4 and the liquid outlet channel 5 are connected to external equipment, and water can be transported to the heat exchange space 16 through the liquid inlet channel 4. The coolant can flow out from the liquid outlet channel 5 after heat exchange with the heat exchange tube 21 in the heat exchange space 16.

[0064] In this embodiment, the liquid inlet channel 4 and the liquid outlet channel 5 are arranged on the side plate 15 on the same side. Figure 3 As shown;

[0065] In this embodiment, the inlet and outlet of the refrigerant gas collecting pipe 22 and the refrigerant liquid inlet pipe 23 are arranged vertically with the inlet and outlet of the liquid inlet channel 4 and the liquid outlet channel 5. Figure 2 , Figure 3 As shown;

[0066] The basic heat exchange working principle between the heat exchange tube assembly 2 and the coolant in this heat exchanger is:

[0067] The refrigerant enters from the external equipment along the end inlet of the refrigerant inlet pipe 23, and then flows into each heat exchange tube 21. The refrigerant flows upward along each heat exchange tube 21 and finally enters the refrigerant gas collecting pipe 22, and flows out from the end outlet of the refrigerant gas collecting pipe 22 to enter the external equipment connected thereto;

[0068] The refrigerant gas collecting pipe 22 is located above the refrigerant liquid inlet pipe 23. Figure 3 As shown;

[0069] The refrigerant is transported by external equipment along the liquid inlet channel 4 into the heat exchange space 16 , and the refrigerant contacts the heat exchange tubes 21 in the heat exchange space 16 to achieve heat exchange, and finally flows out through the liquid outlet channel 5 .

[0070] In this embodiment, a diffusion structure 41 is connected between the liquid inlet channel 4 and the main housing 1. The diffusion structure 41 is formed with a slope to be similar to a trumpet shape. Figure 8 As shown;

[0071] When the coolant flows from the liquid inlet channel 4 to the heat exchange space 16, it can be diffused through the diffusion structure 41 to achieve diversion;

[0072] In this embodiment, a flow collecting structure 51 is connected between the liquid outlet channel 5 and the main housing 1. The flow collecting structure 51 is formed with a slope so as to be similar to a trumpet shape. Figure 8 As shown;

[0073] When the coolant flows from the heat exchange space 16 to the liquid outlet channel 5, it can be gathered through the collecting structure 51 to achieve collecting.

[0074] The liquid inlet channel 4, the diffusion structure 41 and the main housing 1 are connected as a whole by welding;

[0075] The liquid outlet channel 5, the current collecting structure 51 and the main shell 1 are connected as a whole by welding.

[0076] In this embodiment, the outlet end of the refrigerant collecting pipe 22 passing through the main shell 1 is connected with a copper transition connection section, which can be connected to the copper interface of the external equipment by homogeneous welding;

[0077] In this embodiment, the refrigerant liquid inlet pipe 23 passes through one end of the main shell 1 and is connected to a copper transition connection section, which can be connected to the copper interface of the external device by homogeneous welding.

[0078] A plurality of partition baffles 3 are arranged in the heat exchange space 16. The partition baffles 3 are interspersed in the tube intervals of the serpentine U-shaped heat exchange tubes 21. Figure 3 As shown;

[0079] One side edge of the partition baffle 3 corresponds to the bent portion of the heat exchange tube 21, so the inner side walls of the side plate 15 are separated to form a bend in the flow channel;

[0080] The remaining three side edges of the partition baffle 3 are respectively welded to the inner side walls of the front side plate 13, the back side plate 14 and the side side plate 16 to achieve sealing;

[0081] The plurality of partition baffles 3 cooperate with the shape of the heat exchange tube 21 to form a serpentine closed coolant flow channel 31 in the heat exchange space 16. Figure 3 As shown;

[0082] Since the three side edges of the partition baffle 3 are welded and sealed with the corresponding inner side walls of the main shell 1, the problem of bypass caused by a gap at the connection between the two is avoided. After entering the heat exchange space 16, the coolant can only flow along the closed coolant flow channel 31;

[0083] The shape of the closed refrigerant flow channel 31 formed by the partition baffle 3 in the heat exchange space 16 matches the heat exchange tube 21, so that the heat exchange tube 21 is in the closed refrigerant flow channel 31;

[0084] When the coolant flows in the closed coolant flow channel 31, it can fully contact with the heat exchange tube 21 to achieve heat exchange, effectively ensuring the heat exchange performance of the heat exchanger.

[0085] In this embodiment, the liquid inlet channel 4 and the liquid outlet channel 5 are respectively connected to the two ends of the closed coolant flow channel 31. Figure 3 As shown;

[0086] The liquid inlet channel 4 is located below the liquid outlet channel 5. Figure 3 , Figure 5 As shown;

[0087] When the heat exchanger is actually working, the refrigerant flows into the closed refrigerant flow channel 31 from the liquid inlet channel 4 located below. During the process of flowing from bottom to top along the closed refrigerant flow channel 31, the refrigerant fully contacts with the heat exchange tubes 21 located therein to realize heat exchange. Finally, the refrigerant flows out from the liquid outlet channel 5 located above the liquid inlet channel 4. The refrigerant flows in reverse from bottom to top to perform heat exchange, which can further improve the heat exchange efficiency.

[0088] In this embodiment, three side edges of the partition baffle 3 are connected to the inner side wall of the main shell 1 by brazing.

[0089] The side of the partition baffle 3 is formed with a flange structure 32, such as Fig. 9 As shown;

[0090] The flange structure 32 is used to increase the contact area between the partition baffle plate 3 and the inner wall of the main shell 1, and the side of the flange structure 32 is welded to the inner wall of the main shell 1;

[0091] In this embodiment, the flange structure 32 is specifically located on the upper surface of the partition baffle 3, corresponding to the two sides of the front side plate 13 and the back side plate 14, such as Figure 8 , Fig. 9 As shown;

[0092] The side surface of the flange structure 32 can contact the inner side wall of the front side plate 13 and the inner side wall of the back side plate 14, thereby achieving the effect of increasing the contact area;

[0093] The partition baffle plate 3 is welded to the inner wall of the main shell 1 via the flange structure 32 , which improves the connection stability of the partition baffle plate 3 in the heat exchange space 16 to a certain extent.

[0094] A bridge support plate 33 is formed between the partition baffle plate 3 and the heat exchange tube 21. Figure 6 , Fig. 9 As shown;

[0095] The upper surface of the bridge support plate 33 cooperates with the heat exchange tube 21, and the bridge support plate 33 can support the heat exchange tube 21 located above it, thereby improving the stability of the heat exchange tube 21 in the heat exchange space 16;

[0096] There are two protruding feet at the bottom of the bridge support plate 33. The bridge support plate 33 is in contact with the partition baffle plate 3 through the protruding feet. A gap is formed between the two protruding feet, which reduces the obstruction of the bridge support plate 33 to the flow of the coolant.

[0097] Example 2

[0098] This embodiment is different from the embodiment 1 in that, in this embodiment, the liquid inlet channel 4 and the liquid outlet channel 5 are arranged on the side plates 15 on different sides.

[0099] In this embodiment, the main shell is formed by welding a plurality of bent plates into a rectangular box body.

[0100] In this embodiment, the up-and-down positional relationship between the liquid inlet channel 4 and the liquid outlet channel 5 can be set according to individual requirements to set the direction of liquid inlet and outlet.

[0101] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A box-type heat exchanger, comprising: The heat exchange tube assembly (2) is used to transmit the refrigerant so that it can achieve heat exchange with the refrigerant; A main body shell (1), wherein a heat exchange space (16) is formed inside the main body shell (1), and the heat exchange tube assembly (2) is capable of achieving heat exchange with a coolant in the heat exchange space (16); Features: A plurality of partition baffles (3) are arranged in the heat exchange space (16), and the partition baffles (3) are arranged in the heat exchange space (16) to form a serpentine closed refrigerant flow channel (31). The heat exchange tube assembly (2) includes at least one group of heat exchange tubes (21), and the heat exchange tubes (21) are located in the closed refrigerant flow channel (31). After the refrigerant enters the heat exchange space (16), it can only flow along the closed refrigerant flow channel (31) and realize heat exchange in the heat exchange tubes (21).

2. The cassette-type heat exchanger according to claim 1, characterized in that: The heat exchange tube assembly (2) comprises a refrigerant gas collecting pipe (22) and a refrigerant liquid inlet pipe (23), wherein the refrigerant gas collecting pipe (22) and the refrigerant liquid inlet pipe (23) are respectively connected to two ends of the heat exchange tube (21), the refrigerant gas collecting pipe (22) is used for the output of the refrigerant, and the refrigerant liquid inlet pipe (23) is used for the input of the refrigerant.

3. The cassette-type heat exchanger according to claim 1, characterized in that: One side edge of the partition baffle (3) is separated from the inner side wall of the main shell (1) to form a flow channel, and the other three side edges of the partition baffle (3) are welded to the inner side wall of the main shell (1), so that the coolant cannot pass through the welding point between the two.

4. The cassette-type heat exchanger according to claim 3, characterized in that: A flange structure (32) is formed on the side of the partition baffle (3), and the flange structure (32) is used to increase the contact area between the partition baffle (3) and the inner wall of the main shell (1). The flange structure (32) is welded to the inner wall of the main shell (1).

5. The cassette-type heat exchanger according to claim 3, characterized in that: A bridge support plate (33) is formed between the partition baffle plate (3) and the heat exchange tube (21), and the bridge support plate (33) is used to support the heat exchange tube (21) above it.

6. The cassette-type heat exchanger according to claim 1, characterized in that: A liquid inlet channel (4) and a liquid outlet channel (5) are provided on the side of the main shell (1); the liquid inlet channel (4) and the liquid outlet channel (5) are respectively connected to the two ends of the closed coolant flow channel (31); and the liquid inlet channel (4) is located below the liquid outlet channel (5).

7. The cassette-type heat exchanger according to claim 6, characterized in that: A diffusion structure (41) is connected between the liquid inlet channel (4) and the main body shell (1).

8. The cassette-type heat exchanger according to claim 6, characterized in that: A current collecting structure (51) is connected between the liquid outlet channel (5) and the main body shell (1).

9. The cassette-type heat exchanger according to claim 1, characterized in that: The main body shell (1) is a rectangular shell.

10. The cassette-type heat exchanger according to claim 9, characterized in that: The main body shell (1) is composed of a top plate (11), a bottom plate (12) and surrounding side plates, and the top plate (11), the bottom plate (12) and the side plates are sealed and connected by welding.

Images