Heat exchange system and water heater

Abstract

The utility model 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, bypass connection of the two pipelines and the flow adjusting function 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 utility model relates to the technical field of heat exchange equipment, in particular to a heat exchange system and a water heater. Background Art

[0002] In the related art, a flow valve is connected between two pipelines (such as the water inlet pipeline and the water outlet pipeline) of some heat exchange systems to realize the bypass water mixing function. During installation, the valve body of the flow valve needs to be connected in series to the two pipelines at the same time. Due to the limitation of the relative position between the two pipelines, the flow valve is easy to interfere with the pipeline during assembly, which makes assembly more difficult and it is difficult to meet the requirements of assembly accuracy and sealing accuracy, which has a greater risk of water leakage.

[0003] The above contents are only used to assist in understanding the technical solution of this application and do not constitute an admission that the above contents are prior art. Utility Model Content

[0004] The main purpose of the utility model 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-mentioned purpose, the heat exchange system proposed by the utility model comprises:

[0006] Heat exchangers;

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

[0008] A flow valve comprises 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, wherein a main flow channel connected to the first pipeline is formed in the valve body, a bypass flow channel connecting the main flow channel with the second pipeline is formed in the bypass pipe, and the control component is used to control the water flow rate of the main flow channel and / or the bypass flow 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 driving component and a sealing component driven and connected to the driving component. The sealing component is placed in the valve body, and the driving component is used to drive the sealing component 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 two opposite sides in the first direction, and a bypass port for the bypass pipe to be plugged in 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 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, and the first pipeline is inserted into the first interface and abuts against the limiting step.

[0013] In one embodiment, the second joint 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 joint, 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 used for connecting to the bypass pipe is offset relative to the second port toward the first pipe body.

[0018] The utility model also provides a water heater, comprising a shell and a heat exchange system arranged in the shell.

[0019] The flow valve of the technical solution of the utility model has a main flow channel connected to the first pipeline formed in the valve body, and a bypass flow channel connecting the main flow channel with the second pipeline formed in the bypass pipe. The control component is used to control the water flow of the main flow channel and / or the bypass flow channel, so as to realize the bypass connection and flow regulation function of the two pipelines. In addition, when assembling the flow valve with the first pipeline and the second pipeline, the valve body is connected to the first pipeline, and then the end of the bypass pipe away from the valve body is connected to the second pipeline, and the assembly is simple and convenient. In addition, when assembling, it is only necessary to ensure the coaxiality of the valve body and the first pipeline, without being restricted by the second pipeline; and in manufacturing, the length accuracy requirement of the bypass pipe can be appropriately reduced, for example, the length of the bypass pipe can be designed to be slightly longer and have a certain margin. In this way, even if the distance between the first pipeline and the second pipeline is small, the end of the bypass pipe can be appropriately inserted into the second pipeline for adjustment, so as to meet the 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 utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

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

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

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

[0024] Figure 4 for Figure 3 A schematic diagram of a partial cross-sectional structure of a heat exchange system;

[0025] Figure 5 It is a structural schematic diagram of an embodiment of a flow valve of a heat exchange system of the utility model;

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

[0027] Description of Figure Numbers:

[0028] 1000, water heater; 100, heat exchange system; 200, shell; 210, surface 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. pipeline assembly; 21. first pipeline; 211. concave cavity; 22. second pipeline; 30. flow valve; 31. valve body; 301. main flow channel; 311. first joint; 3111. first interface; 312. valve seat; 3121. bypass port; 3122. limiting step; 3123. mounting port; 313. mounting portion; 314. reversing pipe body; 3141. reversing flow channel; 3142. reversing port; 3143. limiting boss; 32. bypass pipe; 302. bypass flow channel; 321. second joint; 3211. second interface; 322. limiting flange; 33. control component; 331. drive assembly; 332. sealing component.

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in 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 utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the 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 contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0034] In the related art, a flow valve is connected between two pipelines (such as the water inlet pipeline and the water outlet pipeline) of some heat exchange systems to realize the 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 is generally an H valve structure. When assembling, the first pipe body needs to be connected in series to the first pipeline, and the second pipe body needs to be connected in series to the second pipeline. In order to ensure the assembly accuracy, it is necessary to maintain a high coaxiality between the first pipeline and the first pipe body, and the second pipeline and the second pipe body need to maintain a high coaxiality; and the relative position between the first pipeline and the second pipeline is fixed, and the length dimension accuracy of the bypass pipe body of the valve body is 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 pipeline and the second pipeline, resulting in the inability to assemble the flow valve; therefore, the manufacturing accuracy of the valve body is very high, and a slight error is easy to cause interference during assembly, and it is difficult to meet the assembly accuracy and sealing requirements, and there is a greater risk of water leakage.

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

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

[0037] Please refer to Figures 3 to 6In one embodiment of the utility model, the heat exchange system 100 includes a heat exchanger 10, a pipeline assembly 20 and a flow valve 30. The pipeline assembly 20 includes a first pipeline 21 and a second pipeline 22 respectively connected to the heat exchanger 10; the flow valve 30 includes a valve body 31 installed on the first pipe body 21, a bypass pipe 32 connecting the valve body 31 and the second pipeline 22, and a control component 33 installed on the valve body 31 or the bypass pipe 32, a main flow channel 301 connected to the first pipeline 21 is formed in the valve body 31, a bypass flow channel 302 connecting the main flow channel 301 and the second pipeline 22 is formed in the bypass pipe 32, and 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 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, and heat is 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 plurality of 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 the 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 pipeline assembly 20 is used to realize fluid transportation in the heat exchange system 100. The pipeline assembly 20 includes a first pipeline 21 and a second pipeline 22 respectively connected to the heat exchanger 10. Among them, the first pipeline 21 and the second pipeline 22 can be connected to the opposite sides of the heat exchanger 10 respectively, or can be connected to the same side of the heat exchanger 10. In practical applications, in order to facilitate the miniaturization of the volume of the flow valve 30, optionally, the first pipeline 21 and the second pipeline 22 are connected to the same side of the heat exchanger 10. In addition, one of the first pipeline 21 and the second pipeline 22 can be a water inlet pipeline connected to the water inlet end of the heat exchanger 10, and the other can be a water outlet pipeline connected to the water outlet end of the heat exchanger 10. For example, when the first pipeline 21 is a water inlet pipeline, the second pipeline 22 is a water outlet pipeline; when the first pipeline 21 is a water outlet pipeline, the second pipeline 22 is a water inlet pipeline. 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 realize the 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, that is to say, the valve body 31 can be connected to the inlet pipeline or the outlet pipeline. The valve body 31 can be connected in series to the middle position of the first pipeline 21, or it can be connected 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 are integrally constructed to form a "T" valve structure. One 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 connected and fixed by welding, threaded connection, 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 are optionally welded and fixed. It is understandable that, in order to facilitate 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, when assembling, 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 is formed with a main flow channel 301 connected to the first pipeline 21, and the bypass pipe 32 is formed with a bypass flow channel 302 connecting the main flow channel 301 with the second pipeline 22, so that the valve body 31, the first pipeline 21, the heat exchanger 10, the second pipeline 22, and the bypass pipe 32 can be connected to form a circulation flow path. When the first pipeline 21 is a water inlet pipeline and the second pipeline 22 is a water outlet pipeline, the cold water of the external water system can be transported to the first pipeline 21 through the main flow channel 301 of the valve body 31, and then transported from the first pipeline 21 to the heat exchange flow channel of the heat exchanger 10 for heating, and then the hot water is output 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, so that the temperature of the hot water output from the second pipeline 22 is not too high to meet the requirement of constant water temperature. When the first pipeline 21 is the water outlet pipeline and the second pipeline 22 is the water inlet pipeline, the cold water of the external water system can be transported to the heat exchange channel of the heat exchanger 10 through the second pipeline 22 for heating, and then transported to the main channel 301 of the valve body 31 through the first pipeline 21, and then the hot water is output through the main channel 301. At the same time, the cold water in the second pipeline 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 is not too high to meet the constant temperature requirement of the water outlet.

[0042] The control component 33 is used to control the water flow rate through the main channel 301 and / or the bypass channel 302. For example, the control component 33 can be used to control the water flow rate through the main channel 301, or the control component 33 is used to control the water flow rate through the bypass channel 302, or the control component 33 can be used to control the water flow rate through the main channel 301, and can also be used to control the water flow rate through the bypass channel 302. The following mainly uses the control component 33 to control the water flow rate through the bypass channel 302 as an example. For example, the on-off of the bypass channel 302 of the valve seat 312 can be controlled by the control component 33 to achieve switching between flow and no flow; or the flow cross-section size of the bypass channel 302 of the valve seat 312 can be adjusted by the control component 33 to achieve flow size adjustment, and the flow size adjustment usually includes, for example, switching between flow gears such as large flow, medium flow, small 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 sends 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] Among them, the control component 33 can be a solenoid valve or a proportional valve. For example, in one embodiment, the control component 33 is a solenoid valve, for example, a normally closed solenoid valve can be used. The solenoid valve is used to control the on-off of the bypass flow channel 302, so that the bypass flow channel 302 can be switched between two gears with bypass flow and without bypass flow, and the adjustment is simple and convenient, and the response speed is fast. For another example, in another embodiment, the control component 33 can be a proportional valve, and the proportional valve is equipped with a stepping motor to achieve continuous stepless adjustment, with higher adjustment accuracy, which can not only realize the on-off control of the bypass flow channel 302, but also realize the flow size adjustment of the bypass flow channel 302.

[0044] There are many installation positions of 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 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 valve body 31 of the flow valve 30 of the technical solution of the utility model is formed with a main channel 301 connected to the first pipeline 21, and the bypass pipe 32 is formed with a bypass channel 302 connecting the main channel 301 with the second pipeline 22. The control component 33 is used to control the water flow rate of the main channel 301 and / or the bypass channel 302, so as to realize the bypass connection and flow regulation function of the two pipelines. In addition, 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, and the assembly is simple and convenient. And 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; and during manufacturing, the length accuracy requirements of the bypass pipe 32 can be appropriately reduced, for example, the length of the bypass pipe 32 can be designed to be slightly longer with a certain margin, so that 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 realizing the bypass connection and flow regulation functions of the two pipelines, it can reduce the difficulty of assembly between 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 connecting the main channel 301 with the bypass channel 302 is provided in the valve body 31, and the control component 33 includes a driving component 331 and a sealing member 332 drivingly connected to the driving component 331, and the sealing member 332 is disposed in the valve body 31, and the driving component 331 is used to drive the sealing member 332 to adjust the opening of the reversing port 3142.

[0047] In this embodiment, the driving component 331 is used to drive the seal 332 to adjust the opening of the reversing port 3142, wherein the driving component 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 driving component 311 drives the seal 322 to open or close the reversing port 3142 to achieve two opening adjustments; further, when the reversing port 3142 is open, the driving component 311 can also drive the seal 322 to adjust the size of the shielding area of ​​the reversing port 3142, thereby achieving multiple opening adjustments of the reversing port 3142 when it is open. In the following, the driving component 331 is mainly used to drive the seal 332 to open or close the reversing port 3142 as an example.

[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 component 331 is fixed at the installation opening 3123 . The driving component 331 is used to drive the sealing member 332 to open or close the reversing opening 3142 .

[0049] In this embodiment, the periphery of the installation port 3123 may be provided with an installation portion 313, the driving assembly 331 is connected to the installation portion 313 and seals the installation port 3123, the sealing member 322 is placed in the valve body 31 via the installation port 322, and the sealing member 332 is driven by the driving assembly 331 to approach or move away from the reversing port 3142 to realize the opening or closing of the reversing port 3142. There are many specific structures of the driving assembly 331. For example, the driving assembly 331 may include a valve stem, an electromagnetic element disposed on the periphery of the valve stem, one end of the valve stem connected to the sealing member 332 faces the reversing port 3142, and an elastic member is disposed between the other end of the valve stem and the electromagnetic element. When the electromagnetic element is powered on, a magnetic attraction is generated on the valve stem, so that the valve stem drives the seal 332 to move away from the reversing port 3142 to open the reversing port 3142; when the electromagnetic element is powered off, the magnetic attraction on the valve stem disappears, and under the action of the elastic member, the valve stem drives the seal 332 to reset to close the reversing port 3142. Alternatively, the drive assembly 331 can also use a linear motor or a cylinder to drive the seal 332 to open or close the reversing port 3142.

[0050] The control component 33 and the mounting portion 313 are fixed in a detachable connection manner including but not limited to screw connection, snap connection, etc., or the control component 33 can also be connected and fixed to the mounting portion 313 by welding, bonding, etc. In order to facilitate the disassembly and maintenance of the control component 33, the control component 33 can be detachably connected to the mounting portion 313. For example, the mounting portion 313 is provided with a first connection hole for the fastener to pass through, and the control component 33 is provided with a second connection hole corresponding to the first connection hole. The control component 33 can be locked to the mounting portion 313 of the valve body 31 by fasteners (such as screws, bolts, etc.) passing through the first connection hole and the second connection hole. The mounting portion 313 is arranged on the side of the valve body 31 away from the bypass pipe 32, so that the control component 33 can be assembled on the side of the valve body 31 away from the bypass pipe 32, and the space on the side of the valve body 31 away from the bypass pipe 32 is not interfered by other pipelines, which can facilitate the disassembly and assembly of the control component 33.

[0051] like Figure 1As shown, when the heat exchange system 100 is applied to the water heater 1000, the heat exchange system 100 is installed in the shell 200 of the water heater 1000, wherein the shell 200 includes a detachably connected surface shell 210 and a bottom shell 220. In order to facilitate the maintenance of the control component 33, the control component 33 is optionally arranged on the side of the valve body 31 facing the surface shell 210, so that the user can directly maintain the control component 33 by opening the surface shell, thereby reducing the difficulty of maintaining the flow valve 30.

[0052] In order to extend the service life of the flow valve 30, optionally, the first pipeline 21 is a water inlet pipeline for conveying cold water to the heat exchanger 10. In this way, the valve body 31 of the flow valve 30 is arranged on the first pipeline 21, and the control component 33 is arranged on the valve body 31, so that the overall installation environment temperature of the flow valve 30 is low, which is conducive to reducing the temperature rise. And the seal 332 of the control component 33 is located in the main flow channel 301 of the valve body 31. At this time, the main flow channel 301 passes cold water, so that the seal 332 is at room temperature or low temperature environment, so the seal 332 can be made of high temperature resistant sealing materials without using special materials. The seal 332 only needs to use conventional sealing materials to ensure sealing performance and service life, which can reduce costs. In addition, the water pressure of the water inlet pipeline is usually greater than the water pressure of the water outlet pipeline. When the seal 332 is closed at the reversing port 3142, the seal 332 can be pressed against the reversing port 3142 under the pressure difference on both sides, thereby further ensuring the sealing reliability.

[0053] In one embodiment, the valve body 31 is provided with first connectors 311 connected to the first pipeline 21 on two 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 joints 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 joints 311. The first joint 311 and the first pipeline 21 are connected by means of, 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 joint 321. The first joint 311 has a first interface 3111, and the second joint 321 has a second interface 3211. The main flow channel 301 in the valve body 31 is connected to the first pipeline 21 via the first interface 3111, and the bypass flow 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 the water outlet joint of the water heater 1000.

[0056] like Figure 6 As shown, in a specific embodiment, the valve body 31 includes a valve seat 312 and a reversing tube body 314, the valve seat 312 is provided with first joints 311 on both sides along the first direction, the valve seat 312 is provided with a bypass port 3121 on one side of the second direction, a valve cavity is formed in the valve seat 312, the reversing tube body 314 is arranged in the valve cavity, one end of the reversing tube body 314 is connected to the bypass port 3121, a reversing flow channel 3141 connected to the bypass flow channel 302 is formed in the reversing tube body 314, and a reversing port 3142 is formed at one end of the reversing tube body 314 away from the bypass port 3121. In this embodiment, the reversing tube body 314 is built into the valve seat 312, so that the structure of the valve body 31 is more compact, which is more conducive to 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, if Figure 6As shown, in one embodiment, in order to allow the water in the main channel 301 to flow better to the reversing channel 3141, the reversing channel 3141 has a first channel and a second channel, one end of the first channel is connected to the main channel 301, and the other end of the first channel is connected to the bypass port 3121 via the second channel, and the flow cross-sectional area of ​​the first channel is greater than the flow cross-sectional area of ​​the second channel. The flow cross-sectional area of ​​the first channel is relatively large, so that the water in the main channel 301 can flow better to the reversing channel 3141, while the flow cross-sectional area of ​​the second channel is relatively small, which can better adapt to the bypass pipe 32 with a smaller pipe diameter. 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, and 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 plugging 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, and 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 pipeline 21 is inserted into the first interface 3111 until the end surface of the first pipeline 21 abuts against the limiting step 3122, indicating that the two are assembled in place, and the first pipeline 21 and the valve body 31 can be quickly positioned and assembled. In addition, after being assembled in place, the end surface of the first pipeline 21 abuts against the limiting step 3122, which can increase the contact area between the first pipeline 21 and the valve body 31 and improve the assembly stability. On the other hand, the limiting step 3122 can also block the gap between the outer peripheral wall of the first pipeline 21 and the inner peripheral wall of the first joint 311, thereby improving the 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 a limiting flange 322 is provided on the outer peripheral surface of one end of the bypass pipe 32 close to the second joint 321 , 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 convex points arranged along the circumference of the bypass pipe 32, or the second limiting flange 322 can be configured as a convex ring extending along the circumference of the bypass pipe 32. In this way, the installation of the bypass pipe 32 and the second pipeline 22 is facilitated. When the bypass pipe 32 and the second pipeline 22 are connected by welding, the provision of the second limiting flange 322 can make the bypass pipe 32 and the second pipeline 22 more sealed, and the difficulty of the welding operation is lower during the welding process.

[0062] On the basis of the above embodiment, one of the first pipeline 21 and the second pipeline 22 is a water inlet pipeline connected to the water inlet end of the heat exchanger 10, and the other is a water outlet pipeline connected to the water outlet end of the heat exchanger 10. That is, the valve body 31 of the flow valve 30 can be installed on the water inlet pipeline or the water outlet pipeline.

[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 pipeline 21 is a water inlet pipeline and the second pipeline 22 is a water outlet pipeline, the first port 101 is a water inlet port of the heat exchanger 10 and the second port 102 is a water outlet port of the heat exchanger 10; when the first pipeline 21 is a water outlet pipeline and the second pipeline 22 is a water inlet pipeline, the first port 101 is a water outlet port of the heat exchanger 10 and the second port 102 is a 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, so that the first pipeline 21 and the second pipeline 22 are connected to the same side of the heat exchanger 10, which can realize water inlet and water outlet on the same side of the heat exchanger 10, which is conducive to reducing the distance between the first pipeline 21 and the second pipeline 22, and then can reduce the length of the bypass pipe 32, which is conducive to shortening the bypass mixing time and is conducive to miniaturization of the volume of the flow valve 30.

[0065] In order to further reduce the length of the bypass pipe 32, the length of the bypass pipe 32 is made smaller than the size 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 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 generally arranged as a straight pipe; alternatively, the first pipeline 21 can be generally arranged as a 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 pipeline 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 is conducive to shortening the length of the bypass pipe 32. In addition, as Figure 3 As shown, the second pipe section and the third pipe section of the first pipeline 21 enclose a concave cavity 211, and the concave cavity 211 is located on the side of the third pipe section away from the second pipeline 22, so that the control component 33 of the flow valve 30 can be at least partially arranged in the concave cavity 211, so that the space constructed by the first pipeline 21 itself can be fully utilized to accommodate the flow valve 30, so that when the heat exchanger 10 is installed in the water heater 1000, the water heater 1000 has enough space to accommodate the flow valve 30, and the thickness of the water heater 1000 will not be too thick to affect the overall size of the water heater 1000. Optionally, the control component 33 is accommodated in the concave cavity 211, and the outer side of the control component 33 does not exceed the outer edge of the heat exchanger 10, so that the control component 33 of the flow valve 30 is not easily damaged by bumps during transportation and turnover.

[0068] like Figure 1 and Figure 2As shown, the utility model also proposes a water heater 1000, which includes a shell 200 and a heat exchange system 100 arranged 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 at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated 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 with bypass water mixing is needed, the technical solution of the utility model can be used. 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 arranged in the housing 200. The housing 200 serves as a support and protection component and as a carrier for installing other components. The housing 200 may specifically include a surface shell 210 and a bottom shell 220, and the surface shell 210 and the bottom shell 220 are enclosed to 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 can be used to install the water heater 1000 on a wall or other supporting structure. A control panel may be provided on the surface of the surface shell 210 to control or display the operating status of the water heater 1000. The burner 300 is arranged below the heat exchanger 10, and 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. The gas is delivered 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 pipeline 21 as the outlet pipeline and the second pipeline 22 as the inlet pipeline as an example, the first valve body 31 of the flow valve 30 is connected in series to the first pipeline 21 (i.e., the outlet pipeline), and the cold water of the external water system can be transported to the heat exchange channel of the heat exchanger 10 through the second pipeline 22 for heating, and then transported to the main channel 301 of the valve body 31 through a part of the first pipeline 21, and then transported to another part of the first pipeline 21 after passing through the main channel 301 to output the hot water to the user end. At the same time, the cold water in the second pipeline 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, so that the temperature of the hot water output by the main channel 301 is not too high to meet the outlet water constant temperature requirement. In order to increase the water inlet pressure, a booster pump 600 is connected to the water inlet end of the water inlet pipeline (such as the second pipeline 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. 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 only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are 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 communicated with the heat exchanger; as well as A flow valve comprises 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, wherein a main flow channel connected to the first pipeline is formed in the valve body, a bypass flow channel connecting the main flow channel with the second pipeline is formed in the bypass pipe, and the control component is used to control the water flow rate of the main flow channel and / or the bypass flow channel.

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

3. The heat exchange system according to claim 2, characterized in that: 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, and 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, characterized in that: The valve body is provided with first connectors connected to the first pipeline on opposite sides of the first direction, and a bypass port for the bypass pipe to be plugged into is provided on one side of the valve body in the second direction, 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.

5. The heat exchange system according to claim 4, characterized in that: 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, and the first pipeline is inserted into the first interface and abuts against the limiting step.

6. The heat exchange system according to claim 4, characterized in that: The second joint 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 joint, and 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, characterized in that: 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, characterized in that: 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 pipeline.

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

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