Heat exchange system and water heater

Abstract

Disclosed in the present application are a heat exchange system and a water heater. The heat exchange system comprises: a heat exchanger; a pipe assembly, which comprises a first pipe and a second pipe that respectively communicate with the heat exchanger; and a flow valve, which comprises a valve body mounted on the first pipe, a bypass pipe connecting the valve body to the second pipe, and a control component mounted on the valve body or the bypass pipe, wherein a main flow channel in communication with the first pipe is formed in the valve body, and a bypass flow channel that communicates the main flow channel with the second pipe is formed in the bypass pipe.

Description

Heat exchange system and water heater

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 202410442034.X, filed on April 12, 2024, and Chinese Patent Application No. 202410442064.0, filed on April 12, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of heat exchange equipment, in particular to a heat exchange system and a water heater. BACKGROUND

[0004] In related technologies, some heat exchange systems have a flow valve connected between two pipelines (e.g., an inlet water pipeline and an outlet water pipeline) to achieve a bypass mixing function. When installing, the valve body of the flow valve needs to be connected to both pipelines at the same time. Due to the relative position between the two pipelines, the flow valve is prone to interfere with the pipelines during assembly, making the assembly difficult, and it is difficult to meet the requirements for assembly accuracy and sealing accuracy, which has a high risk of water leakage.

[0005] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0006] The main purpose of the present application is to provide a heat exchange system, which can realize the bypass connection and flow regulation function of two pipelines, reduce the assembly difficulty between the flow valve and the two pipelines, improve the assembly accuracy and sealing accuracy, and reduce the risk of water leakage.

[0007] To achieve the above purpose, the heat exchange system provided by the present application comprises:

[0008] a heat exchanger;

[0009] a pipeline assembly comprising a first pipeline and a second pipeline in communication with the heat exchanger.

[0010] In an embodiment, the heat exchange system comprises a flow valve, the flow valve comprising a valve body installed on the first pipeline, a bypass pipe connected to the valve body and the second pipeline, and a control component installed on the valve body or the bypass pipe, the valve body forming a main flow passage in communication with the first pipeline, the bypass pipe forming a bypass flow passage in communication with the main flow passage and the second pipeline, and the control component being used to control the water flow of the main flow passage and / or the bypass flow passage.

[0011] In an embodiment, the valve body is provided with a switching port for connecting the main flow channel with the bypass flow channel, the control component comprises a driving assembly and a sealing member in driving connection with the driving assembly, the sealing member is arranged in the valve body, and the driving assembly is configured to drive the sealing member to adjust the opening degree of the switching port.

[0012] In an embodiment, the side wall of the valve body is provided with a mounting port opposite to the switching port, and the driving assembly is fixed to the mounting port and configured to drive the sealing member to open or close the switching port.

[0013] In an embodiment, the valve body is provided with a first joint in communication with the first pipeline on each side in a first direction, and is provided with a bypass port for inserting the bypass pipeline on one side in a second direction, and the bypass pipeline is provided with a second joint in communication with the second pipeline at an end away from the bypass port; wherein the first direction intersects the second direction.

[0014] In an embodiment, the first joint is provided with a first interface for inserting the first pipeline, and 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.

[0015] In an embodiment, the second joint is inserted into the second pipeline, and the outer peripheral surface of the end of the bypass pipeline close to the second joint is provided with a limiting flange, and the limiting flange abuts against the outer peripheral wall of the second pipeline.

[0016] In an embodiment, one of the first pipeline and the second pipeline is a water inlet pipeline in communication with the water inlet end of the heat exchanger, and the other is a water outlet pipeline in communication with the water outlet end of the heat exchanger.

[0017] In an embodiment, the heat exchanger is provided with a first port in communication with the first pipeline and a second port in communication with the second pipeline, and the first port and the second port are located on the same side of the heat exchanger.

[0018] In an embodiment, the first pipeline is offset relative to the first port towards the second pipeline at the position of the valve body;

[0019] In an embodiment, the second pipeline is offset relative to the second port towards the first pipeline at the position of the bypass pipeline.

[0020] The application further provides a water heater comprising a shell and a heat exchange system arranged in the shell.

[0021] In an embodiment, the water heater further comprises:

[0022] A water heater body is arranged in the shell, and the water heater body has a heat exchange channel.

[0023] In an embodiment, the water heater further comprises:

[0024] A waterway assembly is arranged in the shell, and the waterway assembly comprises an inlet pipe, an outlet pipe and a bypass branch, the inlet pipe and the outlet pipe are respectively communicated with the heat exchange channel; the bypass branch is used for bypassing the inlet pipe and the outlet pipe.

[0025] In an embodiment, the water heater further comprises:

[0026] A control valve is detachably arranged on a side of the waterway assembly facing the face cover, and the control valve is used for controlling the water flow of the bypass branch.

[0027] In an embodiment, the shell comprises a bottom shell and a face cover which are detachably connected.

[0028] In an embodiment, the control valve comprises a valve seat and a control component arranged on the valve seat; the valve seat is mounted on the waterway assembly, the control component is detachably mounted on the valve seat, the control component is located on a side of the valve seat facing the face cover, and the control component is used for controlling the water flow of the bypass branch.

[0029] In an embodiment, the control component and the valve seat are connected through a fastener.

[0030] In an embodiment, the valve seat has a mounting portion provided with a first mounting hole, the control component is provided with a second mounting hole corresponding to the position of the first mounting hole, and the fastener passes through the first mounting hole and the second mounting hole and fixes the control component to the valve seat.

[0031] In an embodiment, the control valve further comprises a bypass pipe connected with the valve seat, the valve seat has an inner cavity, and the bypass pipe forms the bypass branch.

[0032] In an embodiment, the valve seat is mounted on the inlet pipe, the inner cavity is communicated with the inlet pipe, one end of the bypass pipe is communicated with the inner cavity, and the other end of the bypass pipe is communicated with the outlet pipe.

[0033] In an embodiment, the valve seat is mounted on the outlet pipe, the inner cavity is communicated with the outlet pipe, one end of the bypass pipe is communicated with the inner cavity, and the other end of the bypass pipe is communicated with the inlet pipe.

[0034] In an embodiment, the face cover has a panel opposite to the bottom shell in a first direction, the water inlet pipe and the water outlet pipe are arranged side by side along the first direction.

[0035] The water inlet pipe is located at a side of the water outlet pipe close to the panel, and the valve seat is mounted on the water inlet pipe.

[0036] In an embodiment, the water outlet pipe is located at a side of the water inlet pipe close to the panel, and the valve seat is mounted on the water outlet pipe.

[0037] In an embodiment, the control component is arranged at a side of the valve seat facing the panel.

[0038] In an embodiment, the bottom shell has a side opening opposite to the waterway assembly in a second direction, the face cover further has a side panel covering the side opening, and the control component is arranged at a side of the valve seat facing the side panel, wherein the first direction intersects the second direction.

[0039] In an embodiment, the face cover has a panel arranged opposite to the bottom shell in a first direction, the water inlet pipe and the water outlet pipe are arranged side by side on the same side of the water heater body in a second direction, the valve seat is arranged on the water inlet pipe or the water outlet pipe, and the control component is arranged at a side of the valve seat facing the panel, wherein the first direction intersects the second direction.

[0040] In an embodiment, a pipe in the waterway assembly for mounting the valve seat is configured to form a recess facing the face cover, and the control component is at least partially accommodated in the recess.

[0041] The valve body of the flow valve of the technical scheme of the application is formed with a main flow channel communicated with the first pipeline, the bypass pipe is formed with a bypass flow channel communicated with the second pipeline and the main flow channel, and 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 of the two pipelines. When the flow valve is assembled with the first pipeline and the second pipeline, the valve body is connected with the first pipeline, and the end of the bypass pipe away from the valve body is connected with the second pipeline, so that the assembly is simple and convenient. When the assembly is performed, the coaxiality of the valve body and the first pipeline is only required to be ensured, and is not limited by the second pipeline. When the bypass pipe is manufactured, the length precision 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 allowance. 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 inserted into the second pipeline to adjust, so as to meet the installation requirements. In this way, while realizing the bypass connection and flow regulation of the two pipelines, the assembly difficulty between the flow valve and the two pipelines can be reduced, the assembly precision and sealing precision are improved, and the water leakage risk is reduced.

[0042] The technical scheme of the application detachably arranges the control valve on the side of the waterway assembly facing the cover. In this way, during actual maintenance, the user can directly maintain the control valve by opening the cover. The maintenance difficulty of the control valve is reduced, and the installation of the control valve is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0044] Fig. 1 is a structural schematic diagram of an embodiment of the water heater of the application;

[0045] Fig. 2 is a structural schematic diagram of the water heater of Fig. 1 without a face shell;

[0046] Fig. 3 is a structural schematic diagram of an embodiment of the heat exchange system of the application;

[0047] Fig. 4 is a partial cross-sectional structural schematic diagram of the heat exchange system of Fig. 3;

[0048] Fig. 5 is a structural schematic diagram of an embodiment of the flow valve of the heat exchange system of the application;

[0049] Fig. 6 is a cross-sectional structural schematic diagram of the flow valve of Fig. 5;

[0050] Fig. 7 is a structural schematic diagram of an embodiment of the water heater provided by the present application;

[0051] Fig. 8 is a structural schematic diagram of the water heater in Fig. 7 with the face cover removed;

[0052] Fig. 9 is a side view of Fig. 8;

[0053] Fig. 10 is another side view of Fig. 8;

[0054] Fig. 11 is a schematic diagram of the installation structure of the heat exchanger and the water circuit assembly in Fig. 8;

[0055] Fig. 12 is an exploded view of the control valve in Fig. 11.

[0056] Brief Description of the Drawings: 1000, water heater; 100, heat exchange system; 200, housing; 210, face shell; 220, bottom shell; 300, burner; 400, fan; 500, gas ratio valve; 600, booster pump; 100, heat exchange system; 10, heat exchanger; 101, first port; 102, second port; 20, circuit assembly; 21, first circuit; 211, recessed cavity; 22, second circuit; 30, flow valve; 31, valve body; 301, main flow passage; 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 passage; 3142, reversing port; 3143, limiting boss; 32, bypass pipe; 302, bypass flow passage; 321, second joint; 3211, second interface; 322, limiting flange; 33, control component; 331, driving assembly; 332, sealing member; 70, water heater; 71, housing; 110, bottom shell; 111, side opening; 120, face cover; 121, face plate; 122, side plate; 72, water heater main body; 73, heat exchanger; 74, water circuit assembly; 310, water inlet circuit; 76, first section of circuit; 77, second section of circuit; 78, third section of circuit; 320, water outlet circuit; 330, bypass branch; 75, recessed cavity; 79, control valve; 410, valve seat; 411, inner cavity; 412, mounting portion; 413, first mounting hole; 420, control component; 421, second mounting hole; 430, bypass pipe; 440, fastener.

[0057] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0058] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0059] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0060] In addition, if the embodiments of the present application involve descriptions such as “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, “and / or” or “and / or” appearing throughout the text means that the three parallel solutions are included, for example, “A and / or B” includes A solution, or B solution, or A and B solutions are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0061] In the related art, a flow valve is connected between two pipelines (for example, an inlet water pipeline and an outlet water pipeline) of some heat exchange systems to realize a bypass mixing water function. In some solutions, 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 in an H valve structure. When assembling, the first pipe body needs to be connected in series on the first pipeline, and the second pipe body needs to be connected in series on the second pipeline. In order to ensure the assembly precision, the first pipeline and the first pipe body need to maintain a high coaxiality, 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 of the bypass pipe body of the valve body has a high precision requirement; for example, if the length of 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, which will cause the flow valve to be unable to be assembled; therefore, the manufacturing precision of the valve body is required to be very high, and a slight error will easily cause interference during assembly, and it is difficult to meet the assembly precision and sealing degree requirements, and there is a high risk of water leakage.

[0062] The above is only used to assist in understanding the technical solutions of the present application and does not mean that the above is prior art.

[0063] Based on this, the present application proposes a heat exchange system 100, which can reduce the assembly difficulty between the flow valve 30 and the two pipelines, improve the assembly precision and sealing precision, and reduce the risk of water leakage by optimizing the structure of the flow valve 30.

[0064] Please refer to FIGS. 3-6, in an embodiment of the present application, 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 that respectively communicate with the heat exchanger 10; the flow valve 30 includes a valve body 31 installed on the first pipeline 21, a bypass pipe 32 connected with 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, the valve body 31 forms a main flow passage 301 that communicates with the first pipeline 21, the bypass pipe 32 forms a bypass flow passage 302 that communicates the main flow passage 301 with the second pipeline 22, and the control component 33 is used to control the water flow of the main flow passage 301 and / or the bypass flow passage 302.

[0065] The heat exchanger 10 is the heat exchange main body of the heat exchange system 100. The heat exchanger 10 includes but is not limited to a tubular heat exchanger, a plate heat exchanger, etc., as long as it can form a heat exchange passage for fluid to pass through, and heat exchange with the fluid in the heat exchange passage through external heat to achieve fluid heating. Hereinafter, the heat exchanger 10 with a tube-fin structure will be mainly described as an example. Specifically, the heat exchanger 10 includes two end plates arranged oppositely and spaced apart, and a plurality of heat exchange pipes arranged between the two end plates, which can be connected to each other in series or in parallel to form a heat exchange passage. In order to improve the heat exchange efficiency, the heat exchanger 10 further includes a plurality of fins arranged side by side between the two end plates, and each heat exchange pipe is inserted into the plurality of fins. When the external heat (for example, the high-temperature flue gas generated by the burner 300 of the water heater 1000 shown in FIG. 1) passes through the heat exchanger 10, the high-temperature flue gas passes through the gap between the two adjacent fins, the high-temperature flue gas exchanges heat with the fins, and then the heat is transferred to the heat exchange pipes through the fins to heat the water in the heat exchange pipes to achieve the hot water function.

[0066] The pipeline assembly 20 is used for fluid delivery in the heat exchange system 100. The pipeline assembly 20 comprises a first pipeline 21 and a second pipeline 22 which are connected to the heat exchanger 10 respectively. The first pipeline 21 and the second pipeline 22 can be connected to opposite sides of the heat exchanger 10 respectively, or can be connected to the same side of the heat exchanger 10. In actual application, in order to facilitate the miniaturization of the flow valve 30, 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 which is in communication with a water inlet end of the heat exchanger 10, and the other one can be a water outlet pipeline which is in communication with a water outlet end of the heat exchanger 10. For example, when the first pipeline 21 is the water inlet pipeline, the second pipeline 22 is the water outlet pipeline; when the first pipeline 21 is the water outlet pipeline, the second pipeline 22 is the water inlet pipeline. Of course, the first pipeline 21 and the second pipeline 22 can also be pipelines for realizing other functions, which are not limited here.

[0067] The flow valve 30 is used for realizing the bypass communication of the first pipeline 21 and the second pipeline 22 in the heat exchange system 100, and the flow valve 30 can also control the water flow in the main flow channel 301 and / or the bypass flow channel 302 through the control member 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 the water inlet pipeline or the water outlet pipeline, that is, the valve body 31 can be connected to the water inlet pipeline or the water outlet pipeline. The valve body 31 can be connected to the middle part of the first pipeline 21, or 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 towards the second pipeline 22, so that the valve body 31 and the bypass pipe 32 integrally form a "T"-type 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 connecting hole for inserting the second joint 321 of the bypass pipe 32. The second joint 321 is inserted into the second connecting hole and is connected and fixed through welding, threaded connection or the like. In order to ensure the sealing reliability of the connection part of the bypass pipe 32 and the second pipeline 22, the bypass pipe 32 and the second pipeline 22 are welded and fixed. It can be understood that in order to facilitate assembly, the valve body 31 and the bypass pipe 32 of the flow valve 30 can be pre-assembled into an integral whole, or the valve body 31 and the bypass pipe 32 can be integrally formed. Thus, during assembly, the valve body 31 is connected to the first pipeline 21, and the bypass pipe 32 is connected to the second pipeline 22. Of course, in some embodiments, the bypass pipe 32 can also be an independent assembly part. During assembly, the valve body 31 is connected to the first pipeline 21, and the two ends of the bypass pipe 32 are connected to the valve body 31 and the second pipeline 22 respectively.

[0068] Please combine with Fig. 4 and Fig. 6, the valve body 31 is formed with a main flow passage 301 which is communicated with the first pipeline 21, and the bypass pipe 32 is formed with a bypass flow passage 302 which is communicated with the main flow passage 301 and 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 communicated to form a circulating flow path. When the first pipeline 21 is the inlet water pipeline and the second pipeline 22 is the outlet water pipeline, the cold water of the external water system can be transported to the first pipeline 21 through the main flow passage 301 of the valve body 31, and then transported to the heat exchange flow passage of the heat exchanger 10 for heating, and then output through the second pipeline 22, and at the same time, the cold water in the main flow passage 301 can be transported to the second pipeline 22 through the bypass flow passage 302 to be mixed with the hot water in the second pipeline 22, so that the temperature of the hot water output by the second pipeline 22 is not too high to meet the constant temperature requirement of the outlet water. When the first pipeline 21 is the outlet water pipeline and the second pipeline 22 is the inlet water pipeline, the cold water of the external water system can be transported to the heat exchange flow passage of the heat exchanger 10 for heating through the second pipeline 22, and then transported to the main flow passage 301 of the valve body 31 through the first pipeline 21, and then output through the main flow passage 301, and at the same time, the cold water in the second pipeline 22 can be transported to the main flow passage 301 through the bypass flow passage 302 to be mixed with the hot water in the main flow passage 301, so that the temperature of the hot water output by the main flow passage 301 is not too high to meet the constant temperature requirement of the outlet water.

[0069] The control component 33 is configured to control the water flow through the main flow channel 301 and / or the bypass flow channel 302. For example, the control component 33 can be configured to control the water flow through the main flow channel 301, or the control component 33 can be configured to control the water flow through the bypass flow channel 302, or the control component 33 can be configured to control the water flow through both the main flow channel 301 and the bypass flow channel 302. Hereinafter, the control component 33 is mainly exemplified as being configured to control the water flow through the bypass flow channel 302. For example, the control component 33 can be configured to control the opening and closing of the bypass flow channel 302 of the valve seat 312 to switch between the flow and no flow. Alternatively, the control component 33 can be configured to adjust the flow area of the bypass flow channel 302 of the valve seat 312 to adjust the flow rate, which usually includes switching between different flow positions, such as large flow, medium flow, small flow, and no flow. For example, when the heat exchange system 100 is applied to the 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 actively controls the water flow through the bypass flow channel 302 through the control component 33, so that the bypass water mixing amount of the water heater 1000 can be adjusted according to the actual working condition to meet different application scenarios, thereby effectively improving the problems of the traditional gas water heater 1000, such as the constant temperature difference between start and stop, high vaporization noise, and low thermal efficiency.

[0070] In some embodiments, the control component 33 can be an electromagnetic valve or a proportional valve. For example, in some embodiments, the control component 33 can be an electromagnetic valve, such as a normally closed electromagnetic valve. The electromagnetic valve is configured to control the opening and closing of the bypass flow channel 302, so that the bypass flow channel 302 can be switched between the bypass flow and no bypass flow, which is simple, convenient, and fast in response. Alternatively, in some embodiments, the control component 33 can be a proportional valve. The proportional valve is configured with a stepping motor to achieve continuous stepless adjustment, which is more accurate. The proportional valve can be configured to control the opening and closing of the bypass flow channel 302, and can also be configured to adjust the flow rate of the bypass flow channel 302.

[0071] In some embodiments, the control component 33 can be installed in various positions. 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 pipe 21 and the second pipe 22 is limited, the control component 33 can be optionally installed on the valve body 31, as shown in FIG. 5. For example, in some embodiments, the valve body 31 is provided with a mounting portion 313 on the side away from the bypass pipe 32, and the control component 33 is fixed to the mounting portion 313.

[0072] The valve body 31 of the flow valve 30 of the technical solution of the present application is formed with a main flow passage 301 in communication with the first pipeline 21, the bypass pipe 32 is formed with a bypass flow passage 302 in communication with the main flow passage 301 and the second pipeline 22, and the control component 33 is used to control the water flow of the main flow passage 301 and / or the bypass flow passage 302, thereby realizing the bypass connection and flow regulation functions of the two pipelines. When assembling the flow valve 30 with the first pipeline 21 and the second pipeline 22, the valve body 31 is connected with the first pipeline 21, and the end of the bypass pipe 32 away from the valve body 31 is connected with the second pipeline 22, which is simple and convenient to assemble. When assembling, only the coaxiality of the valve body 31 and the first pipeline 21 needs to be ensured, and it is not limited by the second pipeline 22; and when manufacturing, the length precision requirement 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 allowance, 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 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, the assembly difficulty between the flow valve 30 and the two pipelines can be reduced, the assembly precision and sealing precision can be improved, and the risk of water leakage can be reduced.

[0073] In one embodiment, the valve body 31 is provided with a reversing port 3142 in communication with the main flow passage 301 and the bypass flow passage 302, and the control component 33 includes a driving assembly 331 and a sealing member 332 in driving connection with the driving assembly 331, the sealing member 332 being arranged in the valve body 31, and the driving assembly 331 being used to drive the sealing member 332 to adjust the opening degree of the reversing port 3142.

[0074] In the present embodiment, the driving assembly 331 is used to drive the sealing member 332 to adjust the opening degree of the reversing port 3142, wherein the driving assembly 331 can drive the sealing member 332 to adjust the opening degree of the reversing port 3142 in a linear motion or a rotary motion, etc. The opening degree adjustment here can be that the driving assembly 311 drives the sealing member 322 to open or close the reversing port 3142, to realize two kinds of opening degree adjustment; further, in the case that the reversing port 3142 is opened, the driving assembly 311 can also drive the sealing member 322 to adjust the size of the shielding area of the reversing port 3142, thereby realizing multiple opening degree adjustment of the reversing port 3142 in the opened state. Hereinafter, the driving assembly 331 is mainly taken as an example to drive the sealing member 332 to open or close the reversing port 3142.

[0075] In an embodiment, the side wall of the valve body 31 is provided with a mounting port 3123 opposite to the reversing port 3142, and the driving assembly 331 is fixed to the mounting port 3123, and the driving assembly 331 is used to drive the sealing member 332 to open or close the reversing port 3142.

[0076] In the embodiment, the periphery of the mounting port 3123 is provided with a mounting portion 313, the driving assembly 331 is connected with the mounting portion 313 and seals the mounting port 3123, the sealing member 322 is arranged in the valve body 31 through the mounting port 322, and the sealing member 332 is driven by the driving assembly 331 to move close to or away from the reversing port 3142, so as to realize the opening or closing of the reversing port 3142. The specific structure of the driving assembly 331 is various. For example, the driving assembly 331 can include a valve rod, an electromagnetic element arranged on the periphery of the valve rod, one end of the valve rod connected with the sealing member 332 is directed to the reversing port 3142, and an elastic member is arranged between the other end of the valve rod and the electromagnetic element. When the electromagnetic element is powered on, a magnetic attraction force is generated on the valve rod, so that the valve rod drives the sealing member 332 to move away from the reversing port 3142, so as to open the reversing port 3142; when the electromagnetic element is powered off, the magnetic attraction force on the valve rod disappears, and under the action of the elastic member, the valve rod drives the sealing member 332 to reset to close the reversing port 3142. Alternatively, the driving assembly 331 can also use a linear motor or a gas cylinder to drive the sealing member 332 to open or close the reversing port 3142.

[0077] The control component 33 and the mounting portion 313 are fixed by means of detachable connection such as screw connection, buckle connection, but are not limited to the above, or the control component 33 can be fixed to the mounting portion 313 by means of non-detachable connection such as welding and bonding. In order to facilitate the disassembly and maintenance of the control component 33, the control component 33 is detachably connected to the mounting portion 313. For example, the mounting portion 313 is provided with a first connecting hole for a fastener to pass through, the control component 33 is provided with a second connecting hole corresponding to the first connecting hole, and the control component 33 is locked to the mounting portion 313 of the valve body 31 by means of the fastener (such as a screw, a bolt, etc.) passing through the first connecting hole and the second connecting 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. The space on the side of the valve body 31 away from the bypass pipe 32 is not interfered by other pipelines, so that the disassembly and assembly of the control component 33 can be facilitated.

[0078] As shown in FIG. 1, when the heat exchange system 100 is applied to the water heater 1000, the heat exchange system 100 is installed in a housing 200 of the water heater 1000, wherein the housing 200 comprises a detachably connected face cover 210 and a bottom cover 220. In order to facilitate the maintenance of the control component 33, the control component 33 is optionally arranged on a side of the valve body 31 facing the face cover 210, so that the user can directly maintain the control component 33 by opening the face cover, thereby reducing the difficulty of maintaining the flow valve 30.

[0079] In order to prolong the service life of the flow valve 30, the first pipeline 21 is optionally 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 flow valve 30 is installed in an environment with a relatively low temperature, which is conducive to reducing the temperature rise. Moreover, the sealing member 332 of the control component 33 is located in the main flow passage 301 of the valve body 31, and the main flow passage 301 passes through cold water at this time, so that the sealing member 332 is in a normal temperature or low temperature environment. Therefore, the sealing member 332 can be made of a conventional sealing material without the need to use a special high-temperature-resistant sealing material, which can ensure the sealing performance and service life and reduce the cost. In addition, the water pressure of the water inlet pipeline is usually greater than that of the water outlet pipeline. When the sealing member 332 is closed to the reversing port 3142, the sealing member 332 can be pressed against the reversing port 3142 under the action of the pressure difference between the two sides, thereby further ensuring the sealing reliability.

[0080] In one embodiment, the valve body 31 is provided with a first joint 311 in communication with the first pipeline 21 on opposite sides in a first direction, and is provided with a bypass port 3121 for inserting the bypass pipe 32 on one side in a second direction, and the bypass pipe 32 is provided with a second joint 321 in communication with the second pipeline 22 at an end away from the bypass port 3121; wherein the first direction intersects the second direction.

[0081] In the embodiment, the valve body 31 is provided with a first joint 311 on each side in the first direction, so that the valve body 31 can be connected in series at the middle position of the first pipeline 21 through the two first joints 311. The first joint 311 and the first pipeline 21 can be connected by means of, but not limited to, threaded connection, clamp connection, plug-in connection, welding, etc. The bypass pipe 32 extends in 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 a second joint 321. The first joint 311 has a first interface 3111, the second joint 321 has a second interface 3211, the main flow passage 301 in the valve body 31 communicates with the first pipeline 21 through the first interface 3111, and the bypass flow passage 302 in the bypass pipe 32 communicates with the second pipeline 22 through the second interface 3211. After the bypass pipe 32 is plugged into the bypass port 3121, it can be fixed by means of threaded connection, welding, etc. to ensure the sealing reliability.

[0082] It can be understood that when the valve body 31 is connected in series at the middle position of the first pipeline 21, the first pipeline 21 is divided into two sections by the valve body 31, and then the valve body 31 needs to be connected to the two sections of the first pipeline 21 through two first joints 311; when the valve body 31 is connected at 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 a water inlet joint or a water outlet joint of the water heater 1000.

[0083] As shown in FIG. 6, in a specific embodiment, the valve body 31 includes a valve seat 312 and a reversing pipe body 314. The valve seat 312 is provided with a first joint 311 on each side in the first direction, and is provided with a bypass port 3121 on one side in the second direction. The valve seat 312 forms a valve cavity therein, and the reversing pipe body 314 is arranged in the valve cavity. One end of the reversing pipe body 314 communicates with the bypass port 3121, the reversing pipe body 314 forms a reversing flow passage 3141 therein which communicates with the bypass flow passage 302, and the other end of the reversing pipe body 314 away from the bypass port 3121 forms a reversing port 3142. In this embodiment, the reversing pipe body 314 is arranged in the valve seat 312, so that the structure of the valve body 31 is more compact, and the valve body 31 is more miniaturized. Meanwhile, the end of the reversing pipe 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.

[0084] Optionally, as shown in FIG. 6, in an embodiment, in order to make the water in the main flow channel 301 flow to the reversing flow channel 3141 better, the reversing flow channel 3141 has a first flow channel and a second flow channel, one end of the first flow channel communicates with the main flow channel 301, the other end of the first flow channel communicates with the bypass port 3121 via the second flow channel, and the flow area of the first flow channel is larger than that of the second flow channel. The relatively large flow area of the first flow channel can make the water in the main flow channel 301 flow to the reversing flow channel 3141 better, while the relatively small flow area of the second flow channel can better adapt to the smaller diameter of the bypass pipe 32. Optionally, the inner circumferential wall of the reversing pipe body 314 is provided with a limiting boss 3143 between the first flow channel and the second flow channel, the limiting boss 3143 has a flow opening for communicating the first flow channel and 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.

[0085] Please refer to FIGS. 4 and 6, in an embodiment, the first joint 311 has a first interface 3111 for inserting the first pipe 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 pipe 21 is inserted into the first interface 3111 and abuts against the limiting step 3122.

[0086] In the embodiment, when assembling, 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, which indicates that the two are assembled in place, and the quick positioning and assembly of the first pipe 21 and the valve body 31 can be achieved. Moreover, after assembly, the end surface of the first pipe 21 abuts against the limiting step 3122, which can increase the contact area between the first pipe 21 and the valve body 31, improve the assembly stability, and on the other hand, the gap between the outer circumferential wall of the first pipe 21 and the inner circumferential wall of the first joint 311 can be shielded by the limiting step 3122, improving the sealing reliability and reducing the risk of water leakage.

[0087] In order to facilitate the installation of the bypass pipe 32 and the second pipe 22, as shown in FIGS. 4 and 5, in an embodiment, the second joint 321 is inserted into the second pipe 22, and the outer circumferential surface of one end 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 circumferential wall of the second pipe 22.

[0088] In the embodiment, the second limiting flange 322 can be arranged as a plurality of convex points arranged circumferentially along the bypass pipe 32, or the second limiting flange 322 can be arranged as a convex ring extending circumferentially along 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 second limiting flange 322 can make the sealing of the bypass pipe 32 and the second pipeline 22 better, and the difficulty of welding operation is lower.

[0089] On the basis of the above-mentioned embodiments, one of the first pipeline 21 and the second pipeline 22 is an inlet pipeline in communication with the water inlet end of the heat exchanger 10, and the other is an outlet pipeline in communication with 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 inlet pipeline or the outlet pipeline.

[0090] As shown in FIG. 4, in one of the embodiments, the heat exchanger 10 has a first port 101 in communication with the first pipeline 21 and a second port 102 in communication with the second pipeline 22, and the first port 101 and the second port 102 are located on the same side of the heat exchanger 10.

[0091] Specifically, when the first pipeline 21 is the inlet pipeline and the second pipeline 22 is the outlet pipeline, 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 pipeline 21 is the outlet pipeline and the second pipeline 22 is the inlet pipeline, 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 the 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 on the same side of the heat exchanger 10, which can realize the water inlet and outlet on the same side of the heat exchanger 10, is conducive to reducing the distance between the first pipeline 21 and the second pipeline 22, thereby being conducive to reducing the length of the bypass pipe 32, is conducive to shortening the time of bypass mixing, and is conducive to miniaturization of the flow valve 30.

[0092] In order to further reduce the length of the bypass pipe 32, the length of the bypass pipe 32 is less than the size of the first port 101 and the second port 102. Alternatively, the part of the first pipeline 21 where the valve body 31 is arranged is offset towards the second pipeline 22 relative to the first port 101; and / or, the part of the second pipeline 22 for connecting the bypass pipe 32 is offset towards the first pipeline relative to the second port 102.

[0093] Specifically, the first pipeline 21 can be bent and offset towards the second pipeline 22 at the position where the valve body 31 is arranged, and the second pipeline 22 is arranged in a straight tube manner; or the first pipeline 21 can be arranged in a straight tube manner, and the second pipeline 22 is bent and offset towards the first pipeline 21 at the position where the bypass pipe 32 is connected; or the first pipeline 21 is bent and offset towards the second pipeline 22 at the position where the valve body 31 is arranged, and the second pipeline 22 is bent and offset towards the first pipeline 21 at the position where the bypass pipe 32 is connected, so as to further reduce the spacing between the first pipeline 21 and the second pipeline 22.

[0094] For example, as shown in FIG. 4, the first pipeline 21 can include a first pipe segment, a second pipe segment and a third pipe segment connected in sequence, the first pipe segment is connected with the first port 101 at one end away from the second pipe segment, the second pipe segment is bent towards the second pipeline 22 relative to the first pipe segment, the third pipe segment is arranged extending away from the first pipe segment relative to the second pipe segment, the valve body 31 is arranged at the third pipe segment, 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 segment of the first pipeline 21 towards the second pipeline 22, the spacing between the third pipe segment of the first pipeline 21 and the second pipeline 22 is reduced, which is beneficial to shorten the length of the bypass pipe 32. In addition, as shown in FIG. 3, the second pipe segment and the third pipe segment of the first pipeline 21 enclose a concave cavity 211, which is located at the side of the third pipe segment away from the second pipeline 22, so that the control component 33 of the flow valve 30 is at least partially arranged in the concave cavity 211, thereby the flow valve 30 can be accommodated in the space formed by the first pipeline 21 itself, 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. Alternatively, 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 circulation.

[0095] As shown in FIG. 1 and FIG. 2, the application also proposes a water heater 1000, which comprises a shell 200 and a heat exchange system 100 arranged in the shell 200. The specific structure of the heat exchange system 100 is referred to the above-mentioned embodiments. Since the water heater 1000 adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here. The water heater 1000 includes but is not limited to gas water heater, electric water heater, solar water heater, air energy water heater, electromagnetic vortex water heater and heat pump water heater, as long as the water heater needs to use bypass water mixing, the technical solution of the application can be used. For the convenience of description, the following will be described taking the gas water heater as an example. The water heater 1000 can be a strong drum type gas water heater or a strong suction type gas water heater.

[0096] Exemplarily, as shown in FIG. 1 and FIG. 2, the water heater 1000 comprises a housing 200, and a heat exchange system 100, a burner 300, a fan 400, a gas proportional valve 500, a booster pump 600 and the like components arranged in the housing 200. Among them, the housing 200 serves as a support and protection component, and as a carrier for mounting other components. The housing 200 can specifically comprise a face shell 210 and a bottom shell 220, and the face shell 210 and the bottom shell 220 enclose a mounting space for accommodating the heat exchange system 100, the burner 300, the fan 400, the gas proportional valve 500, the booster pump 600 and the like components. Among them, the bottom shell 220 can be used to mount the water heater 1000 on a wall or other support structure. The surface of the face shell 210 can be provided with a control panel for controlling or displaying the operating state 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 communicate with the burner 300. The gas proportional valve 500 delivers gas to the burner 300, and when the fan 400 is working, it can supplement secondary air to the burner 300, and also can drive the high-temperature flue gas generated by the combustion of the burner 300 to flow towards the heat exchanger 10, so as to heat the fluid in the heat exchange flow channel of the heat exchanger 10. As shown in FIG. 2, taking the first pipeline 21 as the outlet water pipeline and the second pipeline 22 as the inlet water pipeline as an example, the first valve body 31 of the flow valve 30 is connected in series on the first pipeline 21 (i.e. the outlet water pipeline), and the cold water of the external water system can be delivered to the heat exchange flow channel of the heat exchanger 10 through the second pipeline 22 for heating, then delivered to the main flow channel 301 of the valve body 31 through a part of the pipe section of the first pipeline 21, and then delivered to another part of the pipe section of the first pipeline 21 after passing through the main flow channel 301 to output hot water to the user end, while the cold water in the second pipeline 22 can be delivered to the main flow channel 301 through the bypass flow channel 302 to mix with the hot water in the main flow channel 301, so that the temperature of the hot water output by the main flow channel 301 is not too high to meet the constant temperature requirement of the outlet water. In order to improve the inlet water pressure, the inlet end of the inlet water pipeline (for example, the second pipeline 22) is connected with the booster pump 600. Of course, in some embodiments, the first pipeline 21 can be the inlet water pipeline, and the second pipeline 22 can be the outlet water pipeline, and the valve body 31 of the flow valve 30 is connected in series on the first pipeline 21 (i.e. the inlet water pipeline), so that the ambient temperature of the flow valve 30 is relatively low, which is beneficial to prolong the service life of the flow valve 30.

[0097] In a water heater, in order to facilitate the rapid adjustment of the water temperature of the outlet water, a bypass branch is usually added between the inlet water pipeline and the outlet water pipeline, and an electromagnetic valve is arranged on the bypass branch to control the opening and closing of the bypass branch. When the water temperature of the outlet water is too high, the electromagnetic valve can switch the bypass branch to the open state, so that cold water can be introduced from the inlet water pipeline through the bypass branch, thereby quickly adjusting the water temperature to the temperature required by the user. However, in the above scheme, the inlet water pipeline and the outlet water pipeline are usually arranged side by side along the width direction of the water heater, and the bypass branch and the control valve thereof are arranged between the inlet water pipeline and the outlet water pipeline, and the length direction of the control valve is consistent with the extension direction of the inlet water pipeline or the outlet water pipeline. Due to the limited space of the water heater for the water pipeline assembly, such arrangement makes it difficult to disassemble and assemble the bypass branch and the control valve thereof, and the difficulty of later maintenance is large.

[0098] The present application provides a water heater. It aims to solve the problem of difficulty in disassembling and assembling the bypass branch and the control valve thereof, and the difficulty of later maintenance. For the convenience of understanding and description, in Figures 7 to 12 of the drawings of the present application, the space, slot or hole is indicated by a solid line arrow.

[0099] Please refer to Figures 7 to 12, in an embodiment of the present application, the water heater 70 comprises a shell 71, a water heater body 72, a water pipeline assembly 74 and a control valve 79, the shell 71 comprises a detachable bottom shell 110 and a face cover 120; the water heater body 72 is arranged in the shell 71, and the water heater body 72 has a heat exchange channel; the water pipeline assembly 74 is arranged in the shell 71, and the water pipeline assembly 74 comprises an inlet water pipeline 310, an outlet water pipeline 320 and a bypass branch 330, the inlet water pipeline 310 and the outlet water pipeline 320 are respectively communicated with the heat exchange channel; the bypass branch 330 is used to bypass the inlet water pipeline 310 and the outlet water pipeline 320; the control valve 79 is detachably arranged on the side of the water pipeline assembly 74 facing the face cover 120, and the control valve 79 is used to control the water flow of the bypass branch 330.

[0100] Generally, the shell 71 serves as a support and protection component, and as a carrier for the installation of other components. In actual use, the bottom shell 110 is usually used to connect with the wall or other building objects, so as to install the water heater 70 at a position convenient for the user to use. Of course, the bottom shell 110 can also be installed on other special mounting parts, such as a mounting bracket specially used for installing the water heater 70, which will not be described one by one here. The water heater body 72 and the face cover 120 are usually mounted on the bottom shell 110. The water heater body 72 refers to the main component required for heating water, and the water heater body 72 corresponds to different types in different types of water heaters 70, including but not limited to gas water heaters 70 and electric water heaters 70. In order to facilitate description, the following will be described taking the gas water heater 70 as an example.

[0101] The gas water heater 70 is a device that converts gas fuel such as natural gas, liquefied petroleum gas, etc. into heat energy. The main components of the main body of the gas water heater 70 include a burner, a heat exchanger 73, a safety device, a control panel, etc. Among them, the control panel is usually arranged on the face cover 120, and the burner, the heat exchanger 73 and the safety device are usually installed on the bottom shell 110. The burner is responsible for complete combustion of natural gas or liquefied petroleum gas entering the water tank, generating high-temperature flame for heating water. The heat exchanger 73, also known as the heat exchange pipe, is the core part of the gas water heater 70. It is composed of many slender pipes, which are filled with water flowing through the channels, i.e. heat exchange channels, when the flame passes through the burner, the heat generated will be transferred to the water along these channels, so as to heat the water. The safety device serves as a protection device, which will automatically open to release excessive pressure and water vapor when the pressure is too high or the temperature is too high. The main function of the control device is to ensure that the user can safely and conveniently use the water heater 70, and also to ensure the performance and service life of the water heater 70.

[0102] Among them, the main function of the water circuit assembly 74 of the water heater 70 is to introduce the water source into the heat exchange channel for heating, and then deliver the heated water. Specifically, the water circuit assembly 74 includes a water inlet pipe 310 and a water outlet pipe 320. In actual use, the water inlet pipe 310 is used to introduce the water source into the heat exchange channel for heating, and the water outlet pipe 320 is used to deliver the heated water of the water heater 70. In order to enable the gas water heater 70 to have a bypass mixing function, the water circuit assembly 74 further includes a bypass branch 330, which is used to bypass the water inlet pipe 310 and the water outlet pipe 320, and a control valve 79 is further arranged, which is used to control the water flow of the bypass branch 330.

[0103] Further, the valve seat 410 of the control valve 79 is connected between the water inlet pipe and the water outlet pipe, and a bypass flow channel is formed inside the valve seat 410 to communicate the water inlet pipe with the water outlet pipe. The control component 420 is configured to control the water flow through the bypass flow channel of the valve seat 410. Specifically, the control component 420 can be an electromagnetic valve configured to control the opening and closing of the bypass flow channel of the valve seat 410 to switch between a flow state and a non-flow state. Alternatively, the control component 420 can be a proportional valve configured to adjust the flow area of the bypass flow channel of the valve seat 410 to adjust the flow rate. The adjustment of the flow rate can include switching between different flow levels, such as a large flow level, a medium flow level, a small flow level, and a non-flow level. The control component 420 of the control valve 79 is electrically connected to the control system of the gas water heater 70. The control system sends corresponding control instructions to the control component 420 according to the working state of the water heater 70, and the control component 420 can control the water flow through the bypass flow channel, so that the bypass water mixing amount of the water heater 70 can be adjusted according to the actual working condition to meet different application scenarios, thereby effectively improving the problems of the traditional gas water heater 70, such as the constant temperature difference between start and stop, high vaporization noise, and low thermal efficiency.

[0104] Further, in order to facilitate the maintenance and installation of the control valve 79, the control valve 79 is detachably arranged on the side of the waterway assembly 74 facing the face cover 120. In this way, during actual maintenance, the user can directly maintain the control valve 79 by opening the face cover 120, which reduces the difficulty of maintaining the control valve 79 and facilitates the installation of the control valve 79. The maintenance of the control valve 79 usually refers to checking whether the control valve 79 has failed. After determining that the control valve 79 has failed, the control component 420 of the control valve 79 is detached and replaced with another control component 420 that can normally work. The control component 420 can be an electromagnetic valve or a proportional valve, etc. Of course, the control component 420 of the control valve 79 can be detached first, and then checked whether it has failed.

[0105] The technical solution of the present application detachably arranges the control valve 79 on the side of the waterway assembly 74 facing the face cover 120. In this way, during actual maintenance, the user can directly maintain the control valve 79 by opening the face cover 120, which reduces the difficulty of maintaining the control valve 79 and facilitates the installation of the control valve 79.

[0106] Referring to FIGS. 10-12, in an exemplary embodiment, the control valve 79 includes a valve seat 410 and a control component 420 arranged on the valve seat 410; the valve seat 410 is mounted on the waterway assembly 74, and the control component 420 is detachably mounted on the valve seat 410, and the control component 420 is arranged on the side of the valve seat 410 facing the face cover 120, and the control component 420 is configured to control the water flow of the bypass branch 330.

[0107] The valve seat 410 is mounted on the waterway assembly 74, and the mounting manner of the valve seat 410 and the waterway assembly 74 can be detachable mounting, such as threaded connection, clamp connection, etc., or can be non-detachable connection, such as direct welding, or the valve seat 410 and the waterway assembly 74 are directly integrally formed, etc. In an embodiment, the mounting manner of the valve seat 410 and the waterway assembly 74 adopts welding connection. The control component 420 can be a solenoid valve or a proportional valve. For example, in an embodiment, the control component 420 is a solenoid valve, and a normally closed solenoid valve can be specifically used. The solenoid valve is used to control the on-off of the bypass branch 330, so that the bypass flow passage can be switched between the two modes of having bypass flow and not having bypass flow, and the adjustment is simple and convenient, and the response speed is fast. For another example, in another embodiment, the control component 420 can use a proportional valve, and the proportional valve is configured with a stepping motor to realize continuous stepless adjustment, and the adjustment precision is higher, and not only the on-off control of the bypass flow passage can be realized, but also the size adjustment of the bypass flow passage can be realized.

[0108] Further, the control component 420 is detachably connected with the valve seat 410, and can be clamped, threaded or clamped, etc. That is, the control component 420 is connected with the valve seat 410 through a fastener 440. The fastener 440 can be a threaded connection, a clamp, etc.

[0109] Further, the valve seat 410 has a mounting portion 412, the mounting portion 412 is provided with a first mounting hole 413, the control component 420 is provided with a second mounting hole 421 corresponding to the position of the first mounting hole 413, and the fastener 440 passes through the first mounting hole 413 and the second mounting hole 421 and fixes the control component 420 to the valve seat 410. The valve seat 410 also has a mounting port, and the mounting portion 412 is arranged at the mounting port,

[0110] Referring to FIG. 12, in an embodiment, in order to simplify the structure of the bypass branch 330, the control valve 79 further comprises a bypass pipe 430 connected with the valve seat 410, the valve seat 410 has an inner cavity 411, the bypass pipe 430 forms the bypass branch 330; the valve seat 410 is installed on the water inlet pipe 310, the inner cavity 411 is in communication with the water inlet pipe 310, one end of the bypass pipe 430 is in communication with the inner cavity 411, and the other end is in communication with the water outlet pipe 320; or, the valve seat 410 is installed on the water outlet pipe 320, the inner cavity 411 is in communication with the water outlet pipe 320, one end of the bypass pipe 430 is in communication with the inner cavity 411, and the other end is in communication with the water inlet pipe 310. In this way, by directly arranging the control valve 79 on the water inlet pipe 310 or the water outlet pipe 320, the bypass branch 330 can be directly realized as only a pipe, so that the length of the bypass branch 330 can be shortened as much as possible, so that the structure of the waterway assembly 74 is more compact. The control valve 79 is installed on the water inlet pipe 310, so that the temperature of the environment where the control valve 79 is located is low, which can improve the service life of the control component 420.

[0111] Referring to FIGS. 7-10, in another embodiment, the face cover 120 has a face plate 121 opposite the bottom shell 110 in a first direction, and in some embodiments, the face cover 120 generally further comprises a side plate 122 connected with the face plate 121. In order to reduce the space occupied by the waterway assembly 74 in the width direction of the water heater 70, the water inlet pipe 310 and the water outlet pipe 320 are arranged side by side along the first direction; the water inlet pipe 310 is located on the side of the water outlet pipe 320 close to the face plate 121, and the valve seat 410 is installed on the water inlet pipe 310; or, the water outlet pipe 320 is located on the side of the water inlet pipe 310 close to the face plate 121, and the valve seat 410 is installed on the water outlet pipe 320. In this way, by arranging the water inlet pipe 310 and the water outlet pipe 320 side by side on one side of the water heater body 72, the space occupied by the waterway assembly 74 in the width direction of the water heater 70 is reduced.

[0112] It should be noted that the first direction is as shown in FIG. 7, and the first direction can refer to a direction extending along the width direction of the water heater 70 shell 71. Among them, the water inlet pipe 310 and the water outlet pipe 320 are arranged side by side along the first direction, which can be that the water inlet pipe 310 is arranged close to the face plate 121, or the water outlet pipe 320 is arranged close to the face plate 121.

[0113] It can be understood that the panel 121 of the gas water heater 70, in addition to enclosing the installation space together with the bottom shell 110, the control panel or control button of the water heater 70 is usually also installed on the panel 121. Some common components on the panel 121 include a water inlet switch valve, an ignition switch valve, a temperature selection knob, a timer, and a power-off protection device, etc. The water inlet switch valve is arranged on the water inlet pipeline 310 to control the water flow and water pressure entering the water tank; the ignition switch valve controls the natural gas flow entering the combustion chamber; the temperature selection knob is used to set the water temperature range, usually selected among multiple levels, such as 40 degrees, 50 degrees, 60 degrees, etc.; the timer is used to set the interval of heating time and rest time, usually selected among multiple time periods, such as 30 minutes, 45 minutes, 90 minutes, etc.; the power-off protection device is used to automatically cut off the fuel supply when an abnormal condition (such as low water level, high pressure, high temperature, unstable flame, etc.) is detected to ensure safety in use.

[0114] In addition to the above parts, the panel 121 of the gas water heater 70 can also include some additional functions, such as energy-saving mode, water volume sensing, automatic shutdown, fault prompt, etc. Users can make corresponding settings and operations through the keys or display screen on the panel 121. In some embodiments, a fault self-detection device of the control valve 79 can also be provided, which can directly prompt a fault on the panel 121 when the control component 420 of the control valve 79 fails, and the user can directly open the face cover 120 to perform maintenance work on the control component 420.

[0115] On the basis of the above embodiment, in order to facilitate the disassembly of the control component 420 of the control valve 79 from the front, the control component 420 is arranged on the side of the valve seat 410 facing the panel 121. Generally, the bottom shell 110 has a side opening 111 opposite the waterway assembly 74 in the second direction, so that by arranging the control component 420 on the side of the valve seat 410 facing the panel 121, the user can see the control component 420 by opening the face cover 120, and since the other side of the control component 420 is also not blocked by other components, it is also convenient for the user to disassemble the control component 420 for maintenance work.

[0116] In yet another embodiment, in order to facilitate the disassembly of the control component 420 of the control valve 79 from the side of the water heater 70, the bottom shell 110 has a side opening 111 opposite the waterway assembly 74 in the second direction, and the face cover 120 also has a side plate 122 covering the side opening 111, and the control component 420 is arranged on the side of the valve seat 410 facing the side plate 122, wherein the first direction intersects the second direction.

[0117] It can be understood that, with respect to the first direction and the second direction, reference can be made to the direction indication of FIG. 7. The front side and the side mentioned in the foregoing embodiments are relative, and are based on the existing square-shaped shell 71. The front side and the side are usually adjacent sides.

[0118] In an embodiment, the face cover 120 has a panel 121 arranged opposite to the bottom shell 110 in a first direction, the water inlet pipe 310 and the water outlet pipe 320 are arranged side by side on the same side of the water heater body 72 in a second direction, the valve seat 410 is arranged on the water inlet pipe 310 or the water outlet pipe 320, and the control component 420 is arranged on the side of the valve seat 410 facing the panel 121. The first direction intersects the second direction. With respect to the first direction and the second direction, reference can be made to the direction indication of FIG. 7.

[0119] In the embodiment, the water inlet pipe 310 and the water outlet pipe 320 are arranged side by side on the same side of the water heater body 72 in the second direction. It can be understood that the water inlet pipe 310 and the water outlet pipe 320 are arranged to face the panel 121 at the same time. In this case, the water inlet pipe 310 can be arranged close to the side plate 122 of the face cover 120, or the water outlet pipe 320 can be arranged close to the side plate 122 of the face cover 120.

[0120] Please refer to FIG. 9 and FIG. 11. In an embodiment, in order to form the recess 75 facing the face cover 120 in the pipe structure for mounting the valve seat 410 in the waterway assembly 74, the control component 420 is at least partially accommodated in the recess 75. In this way, by forming the recess 75 facing the face cover 120 in the pipe structure for mounting the valve seat 410, on the one hand, the hot and cold water pipes can be arranged closer to each other, and the length of the bypass pipe 430 can be reduced. On the other hand, in some embodiments, when the depth of the recess 75 is large enough, the outer side of the control component 420 of the control valve 79 does not protrude beyond the outer edge of the heat exchanger 73, and the control component 420 is not easily damaged by knocking during transportation and circulation.

[0121] In the embodiment, the recess 75 can be formed by bending the pipe structure for mounting the valve seat 410. The pipe structure for mounting the valve seat 410 can be the water inlet pipe 310 or the water outlet pipe 320, which is not limited herein.

[0122] Please continue to refer to FIG. 9 and FIG. 11. In an exemplary embodiment, the water inlet pipe 310 is arranged on the side of the water outlet pipe 320 close to the face cover 120, and the valve seat 410 is arranged on the water inlet pipe 310. That is, the valve seat 410 is mounted on the water inlet pipe 310, and the middle part of the water inlet pipe 310 is bent towards the side of the water outlet pipe 320, thereby forming the recess 75.

[0123] Specifically, the water inlet pipeline 310 comprises a first section 76 and a second section 77 which are connected by bending; the distance between the water inlet pipeline 310 and the water outlet pipeline 320 at the first section 76 is smaller than that at the second section 77; and the valve seat 410 is arranged at the first section 76. In an embodiment, the distance between the water inlet pipeline 310 and the water outlet pipeline 320 at the first section 76 is the smallest distance between the water inlet pipeline 310 and the water outlet pipeline 320. In other embodiments, the water inlet pipeline 310 and the water outlet pipeline 320 can be arranged in parallel at the first section 76.

[0124] In some embodiments, the water inlet pipeline 310 further comprises a third section 78, the first section 76, the second section 77 and the third section 78 are arranged in sequence by bending, the third section 78 is connected with the heat exchanger 73 and communicates with the heat exchange channel of the heat exchanger 73.

[0125] In another embodiment, the water outlet pipeline 320 is arranged at the side of the water inlet pipeline 310 close to the face cover 120, and the valve seat 410 is arranged at the water outlet pipeline 320. That is, the valve seat 410 is mounted on the water outlet pipeline 320, and the middle part of the water outlet pipeline 320 is bent towards the side of the water inlet pipeline 310, thereby forming the concave cavity 75.

[0126] Specifically, the water outlet pipeline 320 comprises a fourth section and a fifth section which are connected by bending; the distance between the water outlet pipeline 320 and the water inlet pipeline 310 at the fourth section is smaller than that at the fifth section; and the valve seat 410 is arranged at the fourth section. In an embodiment, the distance between the water outlet pipeline 320 and the water inlet pipeline 310 at the fourth section is the smallest distance between the water inlet pipeline 310 and the water outlet pipeline 320. In other embodiments, the water inlet pipeline 310 and the water outlet pipeline 320 can be arranged in parallel at the fourth section.

[0127] In some embodiments, the water outlet pipeline 320 further comprises a sixth section, the fourth section, the fifth section and the sixth section are arranged in sequence by bending, the sixth section is connected with the heat exchanger 73 and communicates with the heat exchange channel of the heat exchanger 73.

[0128] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, which is made based on the technical concept of the present application and the content of the specification and drawings, is included in the patent protection scope of the present application.

Claims

1. A heat exchange system, wherein: The heat exchange system comprises: heat exchangers; a pipeline assembly, comprising a first pipeline and a second pipeline respectively communicating with the heat exchanger; and 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 any one of claims 1 to 3, 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 or 5, 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, wherein: 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 any one of claims 1 to 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, wherein: The water heater includes a shell and a heat exchange system according to any one of claims 1 to 9 disposed in the shell.

11. The water heater according to claim 10, wherein: The water heater further comprises: A water heater body is disposed in the shell, and the water heater body has a heat exchange channel; a water channel assembly disposed in the housing, the water channel assembly comprising a water inlet pipe, a water outlet pipe, and a bypass branch, the water inlet pipe and the water outlet pipe being respectively connected to the heat exchange channel; the bypass branch being used to bypass the water inlet pipe and the water outlet pipe; and a control valve, detachably provided on a side of the water channel assembly facing the face cover, the control valve being used to control the water flow rate of the bypass branch; The housing comprises a bottom shell and a surface cover which are detachably connected.

12. The water heater according to claim 11, wherein The control valve includes a valve seat and a control component arranged on the valve seat; the valve seat is installed on the water channel assembly, and the control component is detachably installed on the valve seat. The control component is located on the side of the valve seat facing the face cover, and the control component is used to control the water flow rate of the bypass branch.

13. The water heater according to claim 12, wherein: The control component is connected to the valve seat via a fastener.

14. The water heater according to claim 13, wherein: The valve seat has a mounting portion, the mounting portion is provided with a first mounting hole, the control component is provided with a second mounting hole at a position corresponding to the first mounting hole, and the fastener passes through the first mounting hole and the second mounting hole and fixes the control component to the valve seat.

15. The water heater according to any one of claims 12 to 14, wherein: The control valve further includes a bypass pipe connected to the valve seat, the valve seat has an inner cavity, and the bypass pipe forms the bypass branch; The valve seat is installed on the water inlet pipe, the inner cavity is connected to the water inlet pipe, one end of the bypass pipe is connected to the inner cavity, and the other end is connected to the water outlet pipe; Alternatively, the valve seat is installed on the water outlet pipe, the inner cavity is connected to the water outlet pipe, one end of the bypass pipe is connected to the inner cavity, and the other end is connected to the water inlet pipe.

16. The water heater according to any one of claims 12 to 15, wherein: The surface cover has a panel opposite to the bottom shell in a first direction, and the water inlet pipe and the water outlet pipe are arranged side by side along the first direction; The water inlet pipe is located on a side of the water outlet pipe close to the panel, and the valve seat is installed on the water inlet pipe; Alternatively, the water outlet pipe is located on a side of the water inlet pipe close to the panel, and the valve seat is installed on the water outlet pipe.

17. The water heater according to claim 16, wherein: The control component is arranged on a side of the valve seat facing the panel.

18. The water heater according to claim 16 or 17, wherein: The bottom shell has a side opening opposite to the water channel assembly in a second direction, the surface cover also has a side plate covering the side opening, and the control component is arranged on a side of the valve seat facing the side plate, wherein the first direction intersects with the second direction.

19. The water heater according to any one of claims 12 to 18, wherein: The face cover has a panel arranged opposite to the bottom shell in a first direction, the water inlet pipe and the water outlet pipe are arranged side by side on the same side of the water heater body along a second direction, the valve seat is arranged on the water inlet pipe or the water outlet pipe, and the control component is arranged on the side of the valve seat facing the panel; wherein the first direction intersects with the second direction.

20. The water heater according to any one of claims 12 to 19, wherein: The pipeline in the water channel assembly for installing the valve seat forms a concave cavity facing the face cover, and the control component is at least partially accommodated in the concave cavity.

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