Heat exchange system and water heater

Abstract

The invention discloses a heat exchange system and a water heater, and relates to the technical field of heat exchange equipment. The heat exchange system comprises a heat exchanger; the pipeline assembly comprises a first pipeline and a second pipeline which are respectively communicated with the heat exchanger; the flow valve comprises a valve body installed on the first pipeline, a bypass pipe connected with the valve body and the second pipeline, and a control component installed on the valve body or the bypass pipe, a main flow channel communicated with the first pipeline is formed in the valve body, and the main flow channel is communicated with the second pipeline. A bypass flow channel for communicating the main flow channel with the second pipeline is formed in the bypass pipe, and the control part is used for controlling the water flow of the main flow channel and / or the bypass flow channel. According to the technical scheme, the bypass connection and flow adjusting functions of the two pipelines are achieved, meanwhile, the assembling difficulty between the flow valve and the two pipelines can be reduced, the assembling precision and the sealing precision are improved, and the water leakage risk is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment, and in particular to a heat exchange system and a water heater. Background Art

[0002] In related technologies, some heat exchange systems use a flow valve connected between two pipes (for example, the water inlet and outlet) to achieve bypass mixing. During installation, the flow valve body must be connected in series to both pipes. Due to the relative position constraints between the two pipes, the flow valve easily interferes with the pipes during assembly, making assembly difficult and difficult to meet the required assembly and sealing precision, posing a significant risk of water leakage.

[0003] The above content is only used to assist in understanding the technical solution of this application and does not constitute an admission that the above content is prior art. Summary of the Invention

[0004] The main purpose of the present invention is to propose a heat exchange system, which aims to realize the bypass connection and flow regulation function of two pipelines, while reducing the assembly difficulty between the flow valve and the two pipelines, improving the assembly accuracy and sealing accuracy, and reducing the risk of water leakage.

[0005] To achieve the above objectives, the heat exchange system proposed in the present invention includes:

[0006] heat exchangers;

[0007] a pipeline assembly, comprising a first pipeline and a second pipeline respectively communicating with the heat exchanger; and

[0008] A flow valve includes a valve body installed on the first pipeline, a bypass pipe connecting the valve body and the second pipeline, and a control component installed on the valve body or the bypass pipe. A main channel connected to the first pipeline is formed in the valve body, and a bypass channel connected to the main channel and the second pipeline is formed in the bypass pipe. The control component is used to control the water flow rate of the main channel and / or the bypass channel.

[0009] In one embodiment, a reversing port connecting the main channel with the bypass channel is provided in the valve body, and the control component includes a drive assembly and a seal connected to the drive assembly, and the seal is placed in the valve body, and the drive assembly is used to drive the seal to adjust the opening of the reversing port.

[0010] In one embodiment, a side wall of the valve body is provided with a mounting opening opposite to the reversing opening, and the driving assembly is fixed at the mounting opening. The driving assembly is used to drive the sealing member to open or close the reversing opening.

[0011] In one embodiment, the valve body is provided with first connectors connected to the first pipeline on opposite sides in the first direction, a bypass port for the bypass pipe to be inserted is provided on one side in the second direction of the valve body, and a second connector connected to the second pipeline is provided at one end of the bypass pipe away from the bypass port; wherein the first direction intersects with the second direction.

[0012] In one embodiment, the first connector has a first interface for plugging the first pipeline, the inner wall surface of the valve body is provided with a limiting step opposite to the first interface, and the first pipeline is inserted into the first interface and abuts against the limiting step.

[0013] In one embodiment, the second connector is inserted into the second pipeline, and a limiting flange is provided on the outer peripheral surface of one end of the bypass pipe close to the second connector, and the limiting flange abuts against the outer peripheral wall of the second pipeline.

[0014] In one embodiment, one of the first pipeline and the second pipeline is a water inlet pipeline connected to a water inlet end of the heat exchanger, and the other is a water outlet pipeline connected to a water outlet end of the heat exchanger.

[0015] In one embodiment, the heat exchanger has a first port communicating with the first pipe and a second port communicating with the second pipe, and the first port and the second port are located on the same side of the heat exchanger.

[0016] In one embodiment, the portion of the first pipeline where the valve body is provided is offset relative to the first port toward the second pipeline;

[0017] And / or, a portion of the second pipeline for connecting to the bypass pipe is offset relative to the second port toward the first pipe body.

[0018] The present invention further provides a water heater, comprising a shell and a heat exchange system arranged in the shell.

[0019] The flow valve of the present invention has a main flow channel formed within the valve body, communicating with a first pipeline, and a bypass flow channel formed within the bypass pipe, communicating the main flow channel with a second pipeline. A control component is used to control the flow rate of water flowing through the main flow channel and / or the bypass flow channel, thereby achieving a bypass connection and flow regulation function between the two pipelines. Furthermore, when assembling the flow valve with the first and second pipelines, the valve body is connected to the first pipeline, and then the end of the bypass pipe, distal from the valve body, is connected to the second pipeline, making assembly simple and convenient. Furthermore, during assembly, only the coaxiality of the valve body and the first pipeline needs to be ensured, without being restricted by the second pipeline. Furthermore, during manufacturing, the length accuracy requirements for the bypass pipe can be appropriately reduced. For example, the bypass pipe can be designed to be slightly longer with a certain margin. Thus, even when the distance between the first and second pipelines is small, the bypass pipe can be adjusted by inserting the end of the bypass pipe appropriately into the second pipeline to meet installation requirements. In this way, while realizing the bypass connection and flow regulation function of the two pipelines, the assembly difficulty between the flow valve and the two pipelines can be reduced, the assembly accuracy and sealing accuracy can be improved, and the risk of water leakage can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 This is a schematic structural diagram of an embodiment of a water heater of the present invention;

[0022] Figure 2 for Figure 1 Schematic diagram of the structure of the medium water heater without the outer shell;

[0023] Figure 3 This is a schematic structural diagram of an embodiment of a heat exchange system of the present invention;

[0024] Figure 4 for Figure 3 Schematic diagram of the partial cross-section structure of the heat exchange system;

[0025] Figure 5 This is a structural schematic diagram of an embodiment of a flow valve of a heat exchange system of the present invention;

[0026] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of a medium flow valve.

[0027] Description of Figure Numbers:

[0028] 1000, water heater; 100, heat exchange system; 200, housing; 210, top shell; 220, bottom shell; 300, burner; 400, fan; 500, gas proportional valve; 600, booster pump;

[0029] 100. Heat exchange system; 10. Heat exchanger; 101. First port; 102. Second port; 20. Pipe assembly; 21. First pipeline; 211. Concave cavity; 22. Second pipeline; 30. Flow valve; 31. Valve body; 301. Main channel; 311. First connector; 3111. First interface; 312. Valve seat; 3121. Bypass port; 3122. Limiting step; 3123. Mounting port; 313. Mounting portion; 314. Reversing pipe body; 3141. Reversing channel; 3142. Reversing port; 3143. Limiting boss; 32. Bypass pipe; 302. Bypass channel; 321. Second connector; 3211. Second interface; 322. Limiting flange; 33. Control component; 331. Drive assembly; 332. Seal.

[0030] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] In the related art, a flow valve is connected between two pipes (e.g., an inlet pipe and an outlet pipe) of some heat exchange systems to achieve a bypass water mixing function. In some schemes, the valve body of the flow valve generally includes a first pipe body, a second pipe body, and a bypass pipe body connected between the first pipe body and the second pipe body, so that the valve body generally has an H-valve structure. During assembly, the first pipe body needs to be connected in series to the first pipe, and the second pipe body needs to be connected in series to the second pipe body. In order to ensure assembly accuracy, it is necessary to maintain a high degree of coaxiality between the first pipe body and the first pipe body, and to maintain a high degree of coaxiality between the second pipe body and the second pipe body; and the relative position between the first pipe and the second pipe is fixed, and the length and size accuracy of the bypass pipe body of the valve body are required to be high; for example, if the bypass pipe body is too long, the distance between the first pipe body and the second pipe body will be greater than the distance between the first pipe body and the second pipe body, resulting in the inability to assemble the flow valve; therefore, the manufacturing accuracy requirements of the valve body are very high, and any slight error will easily cause interference during assembly, making it difficult to meet the assembly accuracy and sealing requirements, and there is a greater risk of water leakage.

[0035] The above content is only used to assist in understanding the technical solution of this application and does not constitute an admission that the above content is prior art.

[0036] Based on this, the present invention proposes a heat exchange system 100, which can reduce the difficulty of assembling the flow valve 30 and the two pipelines by optimizing the structure of the flow valve 30, improve the assembly accuracy and sealing accuracy, and reduce the risk of water leakage.

[0037] Please refer to Figures 3 to 6In one embodiment of the present invention, the heat exchange system 100 includes a heat exchanger 10, a piping assembly 20, and a flow valve 30. The piping assembly 20 includes a first piping 21 and a second piping 22, each connected to the heat exchanger 10. The flow valve 30 includes a valve body 31 mounted on the first piping body 21, a bypass pipe 32 connecting the valve body 31 and the second piping 22, and a control component 33 mounted on the valve body 31 or the bypass pipe 32. The valve body 31 has a main flow channel 301 formed therein, connected to the first piping 21. The bypass pipe 32 has a bypass flow channel 302 formed therein, connecting the main flow channel 301 and the second piping 22. The control component 33 is used to control the water flow rate of the main flow channel 301 and / or the bypass flow channel 302.

[0038] The heat exchanger 10 is the heat exchange main body of the heat exchange system 100. Among them, the heat exchanger 10 includes but is not limited to the use of tubular heat exchangers, plate heat exchangers, etc., as long as a heat exchange channel for fluid to pass through can be constructed, heat can be exchanged with the fluid in the heat exchange channel through external heat to achieve fluid heating. The following mainly uses the heat exchanger 10 with a tube-fin structure as an example for explanation. Specifically, the heat exchanger 10 includes two end plates that are opposite and spaced apart, and a plurality of heat exchange tubes arranged between the two end plates. The multiple heat exchange tubes can be interconnected in series or in parallel to form a heat exchange channel. In order to improve the heat exchange efficiency, the heat exchanger 10 also includes a plurality of fins arranged side by side between the two end plates, and each heat exchange tube is interspersed with a plurality of fins. External heat (for example, Figure 1 When the high-temperature flue gas generated by the burner 300 of the water heater 1000 shown in the figure passes through the heat exchanger 10, the high-temperature flue gas passes through the gap between two adjacent fins, and the high-temperature flue gas exchanges heat with the fins, and then transfers heat to the heat exchange tube through the fins to heat the water in the heat exchange tube to achieve the hot water function.

[0039] The piping assembly 20 is used to transport fluid in the heat exchange system 100. The piping assembly 20 includes a first piping 21 and a second piping 22, each connected to the heat exchanger 10. The first piping 21 and the second piping 22 can be connected to opposite sides of the heat exchanger 10, or they can be connected to the same side of the heat exchanger 10. In practical applications, to facilitate miniaturization of the flow valve 30, the first piping 21 and the second piping 22 can optionally be connected to the same side of the heat exchanger 10. Furthermore, one of the first piping 21 and the second piping 22 can be an inlet piping connected to the water inlet of the heat exchanger 10, and the other can be an outlet piping connected to the water outlet of the heat exchanger 10. For example, when the first piping 21 is the inlet piping, the second piping 22 is the outlet piping; when the first piping 21 is the outlet piping, the second piping 22 is the inlet piping. Of course, the first pipeline 21 and the second pipeline 22 may also be pipelines for realizing other functions, which are not specifically limited here.

[0040] The flow valve 30 is used in the heat exchange system 100 to achieve bypass connection between the first pipeline 21 and the second pipeline 22, and the flow valve 30 can also control the water flow in the main channel 301 and / or the bypass channel 302 through the control component 33. The valve body 31 can be connected to the first pipeline 21 through the first joint 311. Since the first pipeline 21 can be an inlet pipeline or an outlet pipeline, the valve body 31 can be connected to both the inlet pipeline and the outlet pipeline. The valve body 31 can be connected in series to the middle position of the first pipeline 21 or to the end of the first pipeline 21. The bypass pipe 32 is arranged on one side of the valve body 31 and extends toward the second pipeline 22, so that the valve body 31 and the bypass pipe 32 as a whole form a "T"-shaped valve structure. The end of the bypass pipe 32 away from the valve body 31 can be connected to the second pipeline 22 through the second joint 321. For example, the peripheral wall of the second pipeline 22 is provided with a connection hole for the second joint 321 of the bypass pipe 32 to be plugged in. The second joint 321 is plugged into the second connection hole and fixed by welding, threading, etc. In order to ensure the sealing reliability of the connection part between the bypass pipe 32 and the second pipeline 22, the bypass pipe 32 and the second pipeline 22 can be welded and fixed. It is understandable that, for the convenience of assembly, the valve body 31 and the bypass pipe 32 of the flow valve 30 can be pre-assembled to form a whole, or the valve body 31 and the bypass pipe 32 can also be integrally formed. In this way, during assembly, it is only necessary to connect the valve body 31 to the first pipeline 21 and the bypass pipe 32 to the second pipeline 22. Of course, in some embodiments, the bypass pipe 32 can also be used as an independent assembly component. During assembly, the valve body 31 is connected to the first pipeline 21, and then the two ends of the bypass pipe 32 are respectively connected to the valve body 31 and the second pipeline 22.

[0041] Please combine Figure 4 and Figure 6 The valve body 31 includes a main flow channel 301 connected to the first pipeline 21, and the bypass pipe 32 includes a bypass flow channel 302 connected to the main flow channel 301 and the second pipeline 22. This allows the valve body 31, the first pipeline 21, the heat exchanger 10, the second pipeline 22, and the bypass pipe 32 to connect to form a circulation flow path. When the first pipeline 21 is the water inlet and the second pipeline 22 is the water outlet, cold water from the external water system can be transported to the first pipeline 21 through the main flow channel 301 of the valve body 31. From the first pipeline 21, it is transported to the heat exchange flow channel of the heat exchanger 10 for heating, and then output as hot water through the second pipeline 22. At the same time, the cold water in the main flow channel 301 can be transported to the second pipeline 22 through the bypass flow channel 302 to mix with the hot water in the second pipeline 22. In this way, the temperature of the hot water output from the second pipeline 22 is not too high, thereby meeting the requirement for constant water temperature. When the first pipe 21 is the water outlet pipe and the second pipe 22 is the water inlet pipe, the cold water of the external water system can be transported to the heat exchange channel of the heat exchanger 10 through the second pipe 22 for heating, and then transported to the main channel 301 of the valve body 31 through the first pipe 21, and then the hot water is output through the main channel 301. At the same time, the cold water in the second pipe 22 can be transported to the main channel 301 through the bypass channel 302 to mix with the hot water in the main channel 301. In this way, the temperature of the hot water output from the main channel 301 will not be too high, so as to meet the constant temperature requirement of the outlet water.

[0042] The control component 33 is used to control the flow rate of water passing through the main channel 301 and / or the bypass channel 302. For example, the control component 33 can be used to control the flow rate of water passing through the main channel 301, or the control component 33 can be used to control the flow rate of water passing through the bypass channel 302. Alternatively, the control component 33 can be used to control the flow rate of water passing through the main channel 301 or the bypass channel 302. The following mainly uses the control component 33 to control the flow rate of water passing through the bypass channel 302 as an example. For example, the control component 33 can be used to control the opening and closing of the bypass channel 302 of the valve seat 312 to switch between flow and no flow. Alternatively, the control component 33 can be used to adjust the flow rate by adjusting the flow cross-section of the bypass channel 302 of the valve seat 312. The flow rate adjustment typically includes, for example, switching between flow ranges such as high flow, medium flow, low flow, and no flow. For example, when the heat exchange system 100 is applied to a water heater 1000, the control component 33 of the flow valve 30 is electrically connected to the control system of the water heater 1000. The control system issues corresponding control instructions to the control component 33 according to the working state of the water heater 1000, and then the water flow rate of the bypass flow channel 302 can be actively controlled through the control component 33, so that the bypass mixed water volume of the water heater 1000 can be adjusted according to the actual working conditions to meet different application scenarios, thereby effectively improving the problems of the traditional gas water heater 1000 such as the start-stop constant temperature difference, high vaporization noise, and low thermal efficiency.

[0043] The control component 33 may be a solenoid valve or a proportional valve. For example, in one embodiment, the control component 33 is a solenoid valve, such as a normally closed solenoid valve. The solenoid valve is used to control the on-off of the bypass flow channel 302, thereby enabling the bypass flow channel 302 to switch between two levels, one with bypass flow and one without bypass flow, with simple and convenient adjustment and fast response. For another example, in another embodiment, the control component 33 may be a proportional valve. The proportional valve is equipped with a stepper motor to achieve continuous stepless adjustment with higher adjustment accuracy, which can not only achieve on-off control of the bypass flow channel 302, but also achieve flow rate adjustment of the bypass flow channel 302.

[0044] There are many installation positions for the control component 33. For example, the control component 33 can be installed on the valve body 31, or the control component 33 can be installed on the bypass pipe 32. Considering that the diameter of the bypass pipe 32 is generally small and the space between the first pipeline 21 and the second pipeline 22 is limited, in order to facilitate the installation of the control component 33, optionally, as shown in FIG. Figure 5 As shown, the control component 33 is mounted on the valve body 31. For example, in one embodiment, a mounting portion 313 is provided on a side of the valve body 31 away from the bypass pipe 32, and the control component 33 is fixed to the mounting portion 313.

[0045] The flow valve 30 of the present invention has a main flow channel 301 formed within the valve body 31, which communicates with the first pipeline 21. A bypass flow channel 302 is formed within the bypass pipe 32, which connects the main flow channel 301 with the second pipeline 22. A control component 33 is used to control the flow rate of water flowing through the main flow channel 301 and / or the bypass flow channel 302, thereby achieving a bypass connection and flow regulation function for the two pipelines. Furthermore, when assembling the flow valve 30 with the first pipeline 21 and the second pipeline 22, the valve body 31 is connected to the first pipeline 21, and then the end of the bypass pipe 32 away from the valve body 31 is connected to the second pipeline 22, making assembly simple and convenient. During assembly, it is only necessary to ensure the coaxiality of the valve body 31 and the first pipeline 21, without being restricted by the second pipeline 22. Furthermore, during manufacturing, the length accuracy requirements for the bypass pipe 32 can be appropriately lowered. For example, the length of the bypass pipe 32 can be designed to be slightly longer with a certain margin. In this way, even if the distance between the first pipeline 21 and the second pipeline 22 is small, the end of the bypass pipe 32 can be appropriately inserted into the second pipeline 22 for adjustment, thereby meeting the installation requirements. In this way, while achieving the bypass connection and flow regulation functions of the two pipelines, it can reduce the difficulty of assembling the flow valve 30 and the two pipelines, improve assembly accuracy and sealing accuracy, and reduce the risk of water leakage.

[0046] In one embodiment, a reversing port 3142 is provided in the valve body 31 for connecting the main channel 301 with the bypass channel 302. The control component 33 includes a drive assembly 331 and a seal 332 driven and connected to the drive assembly 331. The seal 332 is placed in the valve body 31. The drive assembly 331 is used to drive the seal 332 to adjust the opening of the reversing port 3142.

[0047] In this embodiment, the drive assembly 331 is used to drive the seal 332 to adjust the opening of the reversing port 3142. The drive assembly 331 can drive the seal 332 to perform linear motion or rotational motion to adjust the opening of the reversing port 3142. The opening adjustment here can specifically be that the drive assembly 311 drives the seal 322 to open or close the reversing port 3142 to achieve two types of opening adjustment. Alternatively, when the reversing port 3142 is open, the drive assembly 311 can also drive the seal 322 to adjust the size of the obstruction area of ​​the reversing port 3142, thereby achieving multiple opening adjustments of the reversing port 3142 when it is open. The following mainly takes the example of the drive assembly 331 driving the seal 332 to open or close the reversing port 3142.

[0048] In one embodiment, the side wall of the valve body 31 is provided with an installation opening 3123 opposite to the reversing opening 3142 , and the driving assembly 331 is fixed at the installation opening 3123 . The driving assembly 331 is used to drive the sealing member 332 to open or close the reversing opening 3142 .

[0049] In this embodiment, a mounting portion 313 may be provided around the periphery of the mounting opening 3123. A drive assembly 331 is connected to the mounting portion 313 and seals the mounting opening 3123. A seal 322 is positioned within the valve body 31 via the mounting opening 322. The drive assembly 331 drives the seal 332 toward or away from the reversing opening 3142 to open or close the reversing opening 3142. The drive assembly 331 may have various specific structures. For example, the drive assembly 331 may include a valve stem, an electromagnetic element disposed around the periphery of the valve stem, one end of the valve stem connected to the seal 332 facing the reversing opening 3142, and an elastic element disposed between the other end of the valve stem and the electromagnetic element. When the electromagnetic element is energized, it generates a magnetic attraction force on the valve stem, causing the valve stem to drive the seal 332 to move away from the reversing port 3142, thereby opening the reversing port 3142. When the electromagnetic element is de-energized, the magnetic attraction force on the valve stem disappears, and under the action of the elastic member, the valve stem drives the seal 332 to return to its original position, thereby closing the reversing port 3142. Alternatively, the drive assembly 331 may use a linear motor or a pneumatic cylinder to drive the seal 332 to open or close the reversing port 3142.

[0050] The control component 33 and the mounting portion 313 may be fixed to each other by detachable means, including but not limited to screw connections, snap connections, or non-detachable means, such as welding or bonding. To facilitate disassembly and maintenance of the control component 33, the control component 33 may optionally be detachably connected to the mounting portion 313. For example, the mounting portion 313 may include a first connection hole for a fastener to pass through, and the control component 33 may include a second connection hole corresponding to the first connection hole. The control component 33 may be locked to the mounting portion 313 of the valve body 31 by fasteners (such as screws, bolts, etc.) passing through the first and second connection holes. Providing the mounting portion 313 on the side of the valve body 31 away from the bypass pipe 32 allows the control component 33 to be assembled on the side of the valve body 31 away from the bypass pipe 32. The space on the side of the valve body 31 away from the bypass pipe 32 is free from interference from other pipelines, facilitating assembly and disassembly of the control component 33.

[0051] like Figure 1As shown, when the heat exchange system 100 is applied to a water heater 1000, the heat exchange system 100 is installed in the housing 200 of the water heater 1000, wherein the housing 200 includes a detachably connected front shell 210 and a bottom shell 220. To facilitate maintenance of the control component 33, the control component 33 is optionally provided on the side of the valve body 31 facing the front shell 210. In this way, the user can directly repair the control component 33 by opening the front shell, thereby reducing the difficulty of repairing the flow valve 30.

[0052] To extend the service life of the flow valve 30, the first pipeline 21 can optionally be a water inlet pipeline for delivering cold water to the heat exchanger 10. Thus, the valve body 31 of the flow valve 30 is disposed on the first pipeline 21, and the control component 33 is disposed on the valve body 31. This allows the overall installation environment temperature of the flow valve 30 to be relatively low, which helps reduce temperature rise. Furthermore, the seal 332 of the control component 33 is located within the main flow channel 301 of the valve body 31. At this time, the main flow channel 301 passes cold water, which keeps the seal 332 at room temperature or low temperature. Therefore, the seal 332 does not need to be made of special high-temperature resistant sealing materials. Instead, the seal 332 only needs to be made of conventional sealing materials to ensure sealing performance and service life, which can reduce costs. Furthermore, the water pressure in the water inlet pipeline is generally greater than the water pressure in the water outlet pipeline. When the seal 332 is closed at the reversing port 3142, the pressure difference between the two sides can compress the seal 332 against the reversing port 3142, thereby further ensuring sealing reliability.

[0053] In one embodiment, the valve body 31 is provided with first connectors 311 connected to the first pipeline 21 on opposite sides in the first direction, and the valve body 31 is provided with a bypass port 3121 for the bypass pipe 32 to be plugged in on one side in the second direction, and the bypass pipe 32 is provided with a second connector 321 connected to the second pipeline 22 at one end away from the bypass port 3121; wherein, the first direction intersects with the second direction.

[0054] In this embodiment, the valve body 31 is provided with first connectors 311 on opposite sides along the first direction, so that the valve body 31 can be connected in series to the middle position of the first pipeline 21 through the two first connectors 311. The first connector 311 and the first pipeline 21 are connected by, but not limited to, threaded connection, clamp connection, plug-in connection, welding, etc. The bypass pipe 32 is extended along the second direction, one end of the bypass pipe 32 is plugged into the bypass port 3121 of the valve body 31, and the other end of the bypass pipe 32 is connected to the second pipeline 22 through the second connector 321. The first connector 311 has a first interface 3111, and the second connector 321 has a second interface 3211. The main channel 301 in the valve body 31 is connected to the first pipeline 21 via the first interface 3111, and the bypass channel 302 in the bypass pipe 32 is connected to the second pipeline 22 via the second interface 3211. After the bypass pipe 32 and the bypass port 3121 are plugged in, they can be fixed by threaded connection, welding, etc. to ensure sealing reliability.

[0055] It can be understood that when the valve body 31 is connected in series to the middle position of the first pipeline 21, the first pipeline 21 is divided into two sections by the valve body 31, and the valve body 31 needs to be connected to the two sections of the first pipeline 21 respectively through two first joints 311; when the valve body 31 is connected to the end position of the first pipeline 21, the valve body 31 only needs to be connected to the end of the first pipeline 21 through one first joint 311, and the other first joint 311 can be used as the water inlet joint or water outlet joint of the water heater 1000.

[0056] like Figure 6 As shown, in one specific embodiment, the valve body 31 includes a valve seat 312 and a reversing tube 314. The valve seat 312 is provided with first connectors 311 on both sides along the first direction, and a bypass port 3121 on one side of the valve seat 312 in the second direction. A valve cavity is formed within the valve seat 312, and the reversing tube 314 is disposed within the valve cavity. One end of the reversing tube 314 is connected to the bypass port 3121. A reversing flow channel 3141 is formed within the reversing tube 314, which is connected to the bypass flow channel 302. A reversing port 3142 is formed at one end of the reversing tube 314, which is away from the bypass port 3121. In this embodiment, by embedding the reversing tube 314 within the valve seat 312, the structure of the valve body 31 is made more compact, which facilitates miniaturization of the valve body 31. At the same time, one end of the reversing tube body 314 close to the bypass port 3121 can be sleeved on the outer periphery of the bypass pipe 32, so that the installation of the bypass pipe 32 and the valve body 31 is more stable and reliable.

[0057] Alternatively, as Figure 6As shown, in one embodiment, to facilitate the flow of water from the main channel 301 toward the reversing channel 3141, the reversing channel 3141 comprises a first channel and a second channel. One end of the first channel communicates with the main channel 301, while the other end of the first channel communicates with the bypass port 3121 via the second channel. The flow cross-sectional area of ​​the first channel is greater than that of the second channel. The relatively large flow cross-sectional area of ​​the first channel facilitates the flow of water from the main channel 301 toward the reversing channel 3141, while the relatively small flow cross-sectional area of ​​the second channel allows for better compatibility with the smaller diameter bypass pipe 32. Optionally, the inner wall of the reversing tube body 314 is provided with a limiting boss 3143, which is located between the first flow channel and the second flow channel. The limiting boss 3143 has a flow port that connects the first flow channel with the second flow channel. One end of the bypass pipe 32 is inserted into the second flow channel and can abut against the limiting boss 3143.

[0058] Please refer to Figure 4 and Figure 6 In one embodiment, the first connector 311 has a first interface 3111 for connecting the first pipeline 21, and the inner wall surface of the valve body 31 is provided with a limiting step 3122 opposite to the first interface 3111. The first pipeline 21 is inserted into the first interface 3111 and abuts against the limiting step 3122.

[0059] In this embodiment, during assembly, the first pipe 21 is inserted into the first interface 3111 until the end surface of the first pipe 21 abuts against the limiting step 3122, indicating that the two are fully assembled, thereby enabling rapid positioning and assembly of the first pipe 21 and the valve body 31. Furthermore, after being fully assembled, the end surface of the first pipe 21 abuts against the limiting step 3122, which, on the one hand, increases the contact area between the first pipe 21 and the valve body 31 and improves assembly stability; on the other hand, the limiting step 3122 also blocks the gap between the outer peripheral wall of the first pipe 21 and the inner peripheral wall of the first joint 311, thereby improving sealing reliability and reducing the risk of water leakage.

[0060] In order to facilitate the installation of the bypass pipe 32 and the second pipeline 22, as shown in FIG. Figure 4 and Figure 5 As shown, in one embodiment, the second joint 321 is inserted into the second pipeline 22, and the outer peripheral surface of the bypass pipe 32 close to the second joint 321 is provided with a limiting flange 322, and the limiting flange 322 abuts against the outer peripheral wall of the second pipeline 22.

[0061] In this embodiment, the second limiting flange 322 can be configured as a plurality of raised points arranged along the circumference of the bypass pipe 32, or the second limiting flange 322 can be configured as a raised ring extending along the circumference of the bypass pipe 32. This facilitates the installation of the bypass pipe 32 and the second pipeline 22. When the bypass pipe 32 and the second pipeline 22 are connected by welding, the provision of the second limiting flange 322 can improve the sealing performance between the bypass pipe 32 and the second pipeline 22, and reduce the difficulty of the welding process.

[0062] Based on the above embodiment, one of the first pipe 21 and the second pipe 22 is a water inlet pipe connected to the water inlet end of the heat exchanger 10, and the other is a water outlet pipe connected to the water outlet end of the heat exchanger 10. In other words, the valve body 31 of the flow valve 30 can be installed in either the water inlet pipe or the water outlet pipe.

[0063] like Figure 4 As shown, in one embodiment, the heat exchanger 10 has a first port 101 communicating with the first pipe 21 and a second port 102 communicating with the second pipe 22 , and the first port 101 and the second port 102 are located on the same side of the heat exchanger 10 .

[0064] Specifically, when the first pipe 21 is a water inlet pipe and the second pipe 22 is a water outlet pipe, the first port 101 is the water inlet port of the heat exchanger 10 and the second port 102 is the water outlet port of the heat exchanger 10. When the first pipe 21 is a water outlet pipe and the second pipe 22 is a water inlet pipe, the first port 101 is the water outlet port of the heat exchanger 10 and the second port 102 is the water inlet port of the heat exchanger 10. In this embodiment, the first port 101 and the second port 102 are located on the same side of the heat exchanger 10. In this way, the first pipe 21 and the second pipe 22 are connected to the same side of the heat exchanger 10, enabling water inlet and outlet on the same side of the heat exchanger 10, which is beneficial for reducing the distance between the first pipe 21 and the second pipe 22, thereby reducing the length of the bypass pipe 32, shortening the time of bypass mixing water, and miniaturizing the volume of the flow valve 30.

[0065] In order to further reduce the length of the bypass pipe 32 so that the length of the bypass pipe 32 is smaller than the dimensions of the first port 101 and the second port 102, optionally, the portion of the first pipeline 21 where the valve body 31 is provided is offset relative to the first port 101 toward the second pipeline 22; and / or the portion of the second pipeline 22 for connecting to the bypass pipe 32 is offset relative to the second port 102 toward the first pipe body.

[0066] Specifically, the portion of the first pipeline 21 where the valve body 31 is provided can be bent and offset toward the second pipeline 22, and the second pipeline 22 can be arranged as a substantially straight pipe; alternatively, the first pipeline 21 can be arranged as a substantially straight pipe, and the portion of the second pipeline 22 used to connect to the bypass pipe 32 can be bent and offset toward the first pipe body; alternatively, the portion of the first pipeline 21 where the valve body 31 is provided can be bent and offset toward the second pipeline 22, and the portion of the second pipeline 22 used to connect to the bypass pipe 32 can be bent and offset toward the first pipe body, so as to further reduce the distance between the two.

[0067] For example, Figure 4 As shown, the first pipeline 21 may include a first pipe section, a second pipe section, and a third pipe section connected in sequence. The end of the first pipe section away from the second pipe section is connected to the first port 101. The second pipe section is bent relative to the first pipe section toward the second pipe section 22. The third pipe section is extended relative to the second pipe section toward the side away from the first pipe section. The valve body 31 is provided in the third pipe section, and the bypass pipe 32 is connected between the valve body 31 and the second pipeline 22. In this way, by bending the second pipe section of the first pipeline 21 toward the second pipeline 22, the distance between the third pipe section of the first pipeline 21 and the second pipeline 22 is reduced, which helps to shorten the length of the bypass pipe 32. In addition, as shown in FIG. Figure 3 As shown, the second and third pipe sections of the first pipe 21 enclose a concave cavity 211. The concave cavity 211 is located on the side of the third pipe section away from the second pipe 22. This allows the control component 33 of the flow valve 30 to be at least partially disposed within the concave cavity 211. This allows the space provided by the first pipe 21 to be fully utilized to accommodate the flow valve 30. When the heat exchanger 10 is installed in the water heater 1000, the water heater 1000 has sufficient space to accommodate the flow valve 30, without increasing the thickness of the water heater 1000 and affecting the overall size of the water heater 1000. Optionally, the control component 33 is housed within the concave cavity 211, and the outer side of the control component 33 does not extend beyond the outer edge of the heat exchanger 10. This prevents the control component 33 of the flow valve 30 from being damaged during transportation.

[0068] like Figure 1 and Figure 2As shown, the present invention also proposes a water heater 1000, which includes a shell 200 and a heat exchange system 100 provided in the shell 200. The specific structure of the heat exchange system 100 refers to the above embodiment. Since the water heater 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the water heater 1000 includes but is not limited to gas water heaters, electric water heaters, solar water heaters, air-energy water heaters, electromagnetic eddy current water heaters and heat pump water heaters. As long as a water heater that needs to use bypass water mixing can use the technical solution of the present invention. For the convenience of description, the following takes a gas water heater as an example for explanation, wherein the water heater 1000 can be a strong drum type gas water heater or a strong extraction type gas water heater.

[0069] For example, Figure 1 and Figure 2 As shown, the water heater 1000 includes a housing 200, and components such as a heat exchange system 100, a burner 300, a fan 400, a gas proportional valve 500, and a booster pump 600 disposed within the housing 200. The housing 200 serves as a support and protection component and as a carrier for mounting other components. The housing 200 may specifically include a top shell 210 and a bottom shell 220. The top shell 210 and the bottom shell 220 together form an installation space for accommodating components such as the heat exchange system 100, the burner 300, the fan 400, the gas proportional valve 500, and the booster pump 600. The bottom shell 220 may be used to mount the water heater 1000 on a wall or other supporting structure. A control panel may be provided on the surface of the top shell 210 for controlling or displaying the operating status of the water heater 1000. The burner 300 is located below the heat exchanger 10. The fan 400 and the gas proportional valve 500 are arranged side by side at the bottom of the burner 300 and are connected to the burner 300. Gas is supplied to the burner 300 through the gas proportional valve 500. When the fan 400 is working, it can add secondary air to the burner 300 and can also drive the high-temperature flue gas generated by the burner 300 to flow toward the heat exchanger 10 to heat the fluid in the heat exchange flow channel of the heat exchanger 10. Figure 2As shown, taking the first pipe 21 as the outlet pipe and the second pipe 22 as the inlet pipe as an example, the first valve body 31 of the flow valve 30 is connected in series to the first pipe 21 (i.e., the outlet pipe). The cold water of the external water system can be transported to the heat exchange channel of the heat exchanger 10 through the second pipe 22 for heating, and then transported to the main channel 301 of the valve body 31 through a part of the first pipe 21. After passing through the main channel 301, it is transported to another part of the first pipe 21 to output the hot water to the user end. At the same time, the cold water in the second pipe 22 can be transported to the main channel 301 through the bypass channel 302 to mix with the hot water in the main channel 301. In this way, the temperature of the hot water output by the main channel 301 is not too high to meet the constant temperature requirement of the outlet water. In order to increase the water inlet pressure, a booster pump 600 is connected to the water inlet end of the water inlet pipe (e.g., the second pipe 22). Of course, in some embodiments, the first pipeline 21 can be the water inlet pipeline and the second pipeline 22 can be the water outlet pipeline, and the valve body 31 of the flow valve 30 can be connected in series to the first pipeline 21 (that is, the water inlet pipeline). In this way, the ambient temperature of the flow valve 30 can be relatively low, which is beneficial to extending the service life of the flow valve 30.

[0070] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A heat exchange system, characterized in that: include: heat exchangers; a pipeline assembly, comprising a first pipeline and a second pipeline respectively communicating with the heat exchanger; as well as A flow valve includes a valve body installed on the first pipeline, a bypass pipe connecting the valve body and the second pipeline, and a control component installed on the valve body or the bypass pipe. A main channel connected to the first pipeline is formed in the valve body, and a bypass channel connected to the main channel and the second pipeline is formed in the bypass pipe. The control component is used to control the water flow rate of the main channel and / or the bypass channel.

2. The heat exchange system according to claim 1, wherein: A reversing port connecting the main channel with the bypass channel is provided in the valve body, and the control component includes a drive assembly and a seal connected to the drive assembly. The seal is placed in the valve body, and the drive assembly is used to drive the seal to adjust the opening of the reversing port.

3. The heat exchange system according to claim 2, wherein: The side wall of the valve body is provided with a mounting opening opposite to the reversing opening. The driving assembly is fixed at the mounting opening. The driving assembly is used to drive the sealing member to open or close the reversing opening.

4. The heat exchange system according to claim 1, wherein: The valve body is provided with first joints connected to the first pipeline on opposite sides of the first direction, and a bypass port for the bypass pipe to be inserted is provided on one side of the valve body in the second direction. The bypass pipe is provided with a second joint connected to the second pipeline at one end away from the bypass port; wherein the first direction intersects with the second direction.

5. The heat exchange system according to claim 4, wherein: The first joint has a first interface for plugging the first pipeline. The inner wall surface of the valve body is provided with a limiting step opposite to the first interface. The first pipeline is inserted into the first interface and abuts against the limiting step.

6. The heat exchange system according to claim 4, wherein: The second joint is inserted into the second pipeline. A limiting flange is provided on the outer peripheral surface of one end of the bypass pipe close to the second joint. The limiting flange abuts against the outer peripheral wall of the second pipeline.

7. The heat exchange system according to any one of claims 1 to 6, characterized in that: One of the first pipeline and the second pipeline is a water inlet pipeline connected to the water inlet end of the heat exchanger, and the other is a water outlet pipeline connected to the water outlet end of the heat exchanger.

8. The heat exchange system according to claim 7, wherein: The heat exchanger has a first port communicating with the first pipe and a second port communicating with the second pipe, wherein the first port and the second port are located on the same side of the heat exchanger.

9. The heat exchange system according to claim 8, wherein: The portion of the first pipeline where the valve body is provided is offset relative to the first port toward the second pipeline; And / or, a portion of the second pipeline for connecting to the bypass pipe is offset relative to the second port toward the first pipe body.

10. A water heater, characterized in that: The heat exchange system comprises a shell and the heat exchange system according to any one of claims 1 to 9 arranged in the shell.

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