Heat exchange system and water heater

Abstract

The utility model discloses a heat exchange system and a water heater, and the heat exchange system comprises a water inlet pipe and a water outlet pipe; the flow valve comprises a valve body, a bypass pipe and a control element, the valve body is arranged on the water inlet pipe, the bypass pipe is used for connecting the valve body with the water outlet pipe, the control element is arranged on the valve body, the valve body is provided with a main flow channel communicated with the water inlet pipe, and the bypass pipe is provided with a bypass flow channel for communicating the main flow channel with the water outlet pipe. The control element is used for controlling the water passing flow of the bypass flow channel. The valve body of the flow valve is arranged in the water inlet pipe, when the flow valve works, the working environment temperature of the flow valve is low, the situation that the service life is shortened due to the fact that a control element installed on the valve body works in a high-water-temperature environment and is aged is avoided, the performance stability of the flow valve can be improved, and the service life of the flow valve is prolonged. The service life of the flow valve is prolonged, and more reliable water outlet constant temperature control is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a heat exchange system and a water heater. Background Art

[0002] In the related art, in order to achieve the function of constant temperature of water outlet, some water heaters usually connect a flow valve for achieving constant temperature control of water outlet in the water circuit of the heat exchange system. However, when the flow valve is powered on, it usually generates heat and forms a temperature rise; at the same time, part of the heat generated by the water heater during operation will be radiated, so that the flow valve is affected by the heat radiation and the temperature rise is further increased, which will affect the performance stability of the flow valve and shorten the service life of the flow valve, thereby affecting the reliability of the constant temperature control of water outlet. Utility Model Content

[0003] The main purpose of the utility model is to provide a heat exchange system, which aims to improve the performance stability of the flow valve, extend the service life of the flow valve, and achieve more reliable constant temperature control of water outlet.

[0004] To achieve the above-mentioned purpose, the heat exchange system proposed by the utility model comprises:

[0005] a heat exchanger, including an inlet pipe and an outlet pipe; and

[0006] A flow valve, the flow valve comprising a valve body arranged on the water inlet pipe, a bypass pipe connecting the valve body with the water outlet pipe, and a control element arranged on the valve body, the valve body having a main flow channel connected to the water inlet pipe, the bypass pipe having a bypass flow channel connecting the main flow channel with the water outlet pipe, and the control element being used to control the water flow rate of the bypass flow channel.

[0007] Optionally, the valve body includes a valve seat and a reversing tube body, the valve seat has a valve cavity, a water inlet port, a water outlet port and a bypass port, the water inlet port, the valve cavity and the water outlet port are connected to form the main channel, the reversing tube body is arranged in the valve cavity, the reversing tube body has a reversing flow channel connecting the valve cavity with the bypass port, and the end of the bypass pipe away from the water outlet pipe is connected to the bypass port.

[0008] Optionally, a reversing port connected to the valve cavity is provided at one end of the reversing tube body away from the bypass tube, and the control element includes a driving component and a sealing component driven and connected to the driving component, the sealing component is provided in the valve cavity, and the driving component is used to drive the sealing component to open or close the reversing port.

[0009] Optionally, a mounting cavity is provided on a side of the valve body away from the bypass pipe, and the driving component includes a driving body fixed at the mounting cavity, and a valve stem drivingly connected to the driving body, the valve stem is connected to the sealing component, and the driving body is used to drive the valve stem to perform telescopic movement in the axial direction to drive the sealing component to open or close the reversing port.

[0010] Optionally, the water pressure of the water inlet pipe is greater than the water pressure of the water outlet pipe, and when the sealing component is closed at the reversing port, the sealing component can be pressed against the reversing port under the action of the pressure difference on both sides.

[0011] Optionally, the heat exchanger has a water inlet interface connected to the water inlet pipe, and a water outlet interface connected to the water outlet pipe, and the water inlet interface and the water outlet interface are located on the same side of the heat exchanger.

[0012] Optionally, the portion of the water inlet pipe where the flow valve is provided is bent toward the water outlet pipe, so that the length of the bypass pipe is smaller than the distance between the water inlet interface and the water outlet interface.

[0013] Optionally, the water inlet pipe has a first pipe section and a second pipe section that are bent and connected, the first pipe section is connected between the water inlet interface and the second pipe section, the second pipe section is offset relative to the water inlet interface toward a side close to the water outlet pipe, and the valve body is arranged on the second pipe section.

[0014] Optionally, the first pipe section and the second pipe section are surrounded to form an installation space, the control element is arranged on a side of the valve body away from the water outlet pipe, and the control element is at least partially accommodated in the installation space.

[0015] The utility model also provides a water heater, comprising:

[0016] a housing; and

[0017] The heat exchange system is arranged in the shell.

[0018] The technical solution of the utility model is to set a flow valve, and set the valve body of the flow valve on the water inlet pipe, so that the valve body has a main channel connected to the water inlet pipe and a bypass channel connected to the water outlet pipe and the main channel, and the water flow in the bypass channel is controlled by a control element arranged on the valve body. When the outlet water temperature of the water outlet pipe is too high, the main channel is connected to the water outlet pipe through the bypass channel, so that cold water can flow from the main channel to the bypass channel, neutralize the superheated water in the water outlet pipe, and reduce the water temperature, so as to avoid the outlet water temperature of the water outlet pipe being too high to affect the user experience; at the same time, by placing the valve body of the flow valve on the water inlet pipe, since the water inlet pipe is used for heat exchange to inlet cold water, and the water outlet pipe is used for heat exchanger to outlet hot water, the water temperature at the water inlet pipe is basically in a low temperature environment. When the flow valve is working, the working environment temperature is relatively low, so as to avoid the control element installed on the valve body working in a high water temperature environment, resulting in aging of the control element and a reduction in service life, so as to improve the performance stability of the flow valve, extend the service life of the flow valve, and realize more reliable outlet water constant temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 This is a schematic structural diagram of an embodiment of the water heater of the utility model;

[0021] Figure 2 This is a schematic structural diagram of an embodiment of a heat exchange system of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the flow valve in the heat exchange system of the utility model;

[0023] Figure 4 It is a cross-sectional view of a flow valve in a heat exchange system of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the heat exchanger body in the heat exchange system of the utility model;

[0025] Figure 6 It is a schematic diagram of the partial structure of the heat exchanger body in the heat exchange system of the utility model.

[0026] Description of Figure Numbers:

[0027]

[0028]

[0029] 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

[0030] 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.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] In the related art, in order to achieve the function of constant temperature of water outlet, some water heaters usually connect a flow valve for achieving constant temperature control of water outlet in the water circuit of the heat exchange system. However, when the flow valve is powered on, it usually generates heat and forms a temperature rise; at the same time, part of the heat generated by the water heater during operation will be radiated, so that the flow valve is affected by the heat radiation and the temperature rise is further increased, which will affect the performance stability of the flow valve and shorten the service life of the flow valve, thereby affecting the reliability of the constant temperature control of water outlet.

[0034] Based on this, the utility model proposes a heat exchange system 100, which can improve the performance stability of the flow valve, extend the service life of the flow valve, and achieve more reliable constant temperature control of the water outlet by reasonably arranging the water circuit and flow valve of the heat exchange system.

[0035] Reference Figures 1 to 6In the embodiment of the utility model, the heat exchange system 100 includes a heat exchanger 10 and a flow valve 20. The heat exchanger 10 includes a heat exchanger body 11, a water inlet pipe 12 and a water outlet pipe 13. The flow valve 20 includes a valve body 21 provided on the water inlet pipe 12, a bypass pipe 22 connecting the valve body 21 with the water outlet pipe 13, and a control element 23 provided on the valve body 21. The valve body 21 has a main flow channel connected to the water inlet pipe 12, and the bypass pipe 22 has a bypass flow channel connecting the main flow channel with the water outlet pipe 13. The control element 23 is used to control the water flow rate of the bypass flow channel.

[0036] In this embodiment, the flow valve 20 is arranged in series with the water inlet pipe 12. Specifically, the water inlet pipe 12 is cut into two sections, and the flow valve 20 is connected between the two sections of the water inlet pipe 12. When the heat exchanger 10 is fed with water, the cold water enters the main flow channel from the first section of the water inlet pipe 12, flows into the second section of the water inlet pipe 12 from the main flow channel, and finally enters the heat exchanger 10. Alternatively, in another embodiment, the flow valve 20 is arranged at the water inlet end of the water inlet pipe 12. Specifically, when the water inlet pipe 12 is fed with water, the cold water first enters the main flow channel of the flow valve 20, flows into the water inlet pipe 12 from the main flow channel, and then enters the heat exchanger 10 from the water inlet pipe 12.

[0037] The control element 23 controls the water flow rate of the bypass channel, which means that the control element 23 can control the water flow rate of the bypass channel to switch between flow rate and no flow rate; or the control element 23 can control the size of the water flow rate of the bypass channel to switch between multiple gears such as large flow rate, medium flow rate, small and medium flow rate, small flow rate or no flow rate. When the control element 23 controls the on-off of the bypass channel, the flow valve 20 can be a solenoid valve; when the control element 23 controls the size of the flow rate of the bypass channel, the flow valve 20 can be a proportional valve.

[0038] The technical solution of the utility model is to set a flow valve 20, and set the valve body 21 of the flow valve 20 on the water inlet pipe 12, so that the valve body 21 has a main channel connected to the water inlet pipe 12 and a bypass channel connecting the water outlet pipe 13 and the main channel, and the water flow in the bypass channel is controlled by a control element 23 arranged on the valve body 21. When the outlet water temperature of the water outlet pipe 13 is too high, the main channel is connected to the water outlet pipe 13 through the bypass channel, so that cold water can flow from the main channel to the bypass channel, neutralize the superheated water in the water outlet pipe 13, reduce the water temperature, and avoid the outlet water temperature of the water outlet pipe 13 being too high to affect the user experience.

[0039] At the same time, the valve body 21 of the flow valve 20 is placed in the water inlet pipe 12. Since the water inlet pipe 12 is used for the heat exchange 10 to take in cold water, and the water outlet pipe 13 is used for the heat exchanger 10 to discharge hot water, the water temperature at the water inlet pipe 12 is basically in a low temperature environment. When the flow valve 20 is working, its working environment temperature is relatively low, which prevents the control element 23 arranged in the valve body 21 from working in a high water temperature environment, causing aging of the control element 23 and a reduction in service life.

[0040] Reference Figure 3 , Figure 4 As shown, in this embodiment, the valve body 21 includes a valve seat 211 and a reversing tube body 212, the valve seat 211 has a valve cavity 2111, a water inlet port 2112, a water outlet port 2113 and a bypass port 2114, the water inlet port 2112, the valve cavity 2111 and the water outlet port 2113 are connected to form a main flow channel, the reversing tube body 212 is arranged in the valve cavity 2111, the reversing tube body 212 has a reversing flow channel connecting the valve cavity 2111 with the bypass port 2114, and the end of the bypass pipe 22 away from the water outlet pipe 13 is connected to the bypass port 2114.

[0041] Specifically, the valve cavity 2111 is a cavity inside the valve seat 211. The valve seat 211 has a water inlet port 2112 and a water outlet port 2113. The water inlet port 2112 and the water outlet port 2113 are both connected to the valve cavity 2111. Water flows into the valve cavity 2111 from the water inlet port 2112, and then flows out from the valve cavity 2111 through the water outlet port 2113. The flow path formed by the water flows forms a main channel.

[0042] At the same time, a reversing tube body 212 is also provided in the valve cavity 2111. In this embodiment, the reversing tube body 212 can be integrally formed with the valve cavity 2111, or can be formed by a section of tube provided in the valve cavity 2111, and the specific details are not limited. The inner cavity of the reversing tube body 212 is provided with two ports, one of which is connected to the valve cavity 2111, and the other port directly penetrates the valve seat 211 to form a bypass port 2114, that is, the bypass port 2114 is provided on the surface of the valve seat 211, and penetrates from the surface of the valve seat 211 to the inner cavity of the reversing tube body 212. After the water in the main channel enters the inner cavity of the reversing tube body 212, it flows out from the bypass port 2114, and the flow path formed by the flow path forms a reversing channel.

[0043] In this embodiment, the inner circumferential surface of the reversing tube body 212 is provided with a first limiting flange 2122, and the first limiting flange 2122 is arranged in the reversing flow channel. The first limiting flange 2122 and the end of the reversing tube body 212 away from the reversing port 2121 form an insertion portion, and one end of the bypass pipe 22 is inserted into the insertion portion and abuts against the first limiting flange 2122.

[0044] Optionally, a second limiting flange 221 is provided at one end of the bypass pipe 22 for connection with the water outlet pipe 13. The second limiting flange 221 may be a plurality of convex points arranged along the circumference of the bypass pipe 22, or the second limiting flange 221 may be a convex ring extending along the circumference of the bypass pipe 22. In this way, the installation of the bypass pipe 22 and the water outlet pipe 13 is facilitated. When the bypass pipe 22 and the water outlet pipe 13 are connected by welding, the second limiting flange 221 can make the sealing of the bypass pipe 22 and the water outlet pipe 13 better, and the difficulty of the welding operation is lower during the welding process.

[0045] Optionally, a reversing port 2121 communicating with the valve chamber 2111 is provided at one end of the reversing tube body 212 away from the bypass tube 22, and the control element 23 includes a driving component 231 and a sealing component 232 drivingly connected to the driving component 231, the sealing component 232 is provided in the valve chamber 2111, and the driving component 231 is used to drive the sealing component 232 to open or close the reversing port 2121.

[0046] In this embodiment, the reversing tube body 212 has a cylindrical tubular shape, the reversing port 2121 is one of the tube ports of the reversing tube body 212, and the bypass port 2114 is another tube port of the reversing tube body 212. The two tube ports are connected to the reversing tube body 212 to form a reversing flow channel inside the reversing tube body 212.

[0047] It is understandable that the shapes of the water inlet port 2112, the water outlet port 2113, the bypass port 2114 and the reversing port 2121 can be regular shapes such as circular, elliptical, polygonal, etc., or other irregular shapes. In this embodiment, the shapes of the water inlet port 2112, the water outlet port 2113, the bypass port 2114 and the reversing port 2121 are preferably circular.

[0048] When the control element 23 is working, the driving component 231 drives the sealing component 232 to make corresponding actions, so that the sealing component 232 covers the reversing port 2121, so that the reversing flow channel is in a closed state, and the water flows directly from the main channel to a section of the water inlet pipe 12 close to the heat exchanger 10; or the sealing component 232 leaves the reversing port 2121, thereby opening the reversing port 2121, so that cold water can flow into the reversing flow channel through the main channel.

[0049] Continue to refer to Figure 3 , Figure 4 As shown, further, a mounting cavity is provided on a side of the valve body 21 away from the bypass pipe 22, and the driving component 231 includes a driving body fixed at the mounting cavity, and a valve stem drivingly connected to the driving body, the valve stem is connected to the sealing component 232, and the driving body is used to drive the valve stem to perform telescopic movement along the axial direction to drive the sealing component 232 to open or close the reversing port 2121.

[0050] In this embodiment, a movable cavity is provided in the valve body 21, and two ends of the movable cavity are respectively connected to the installation cavity and the valve cavity 2111. It can be understood that the valve stem is movably installed in the movable cavity. When the driving body drives the valve stem to perform telescopic movement along the axial direction, the telescopic movement of the valve stem can be limited so that the sealing component 232 can be accurately positioned with the reversing port 2121, thereby avoiding the situation where the sealing component 232 cannot completely close the reversing port 2121.

[0051] In this embodiment, the driving body includes an electromagnetic element and an elastic member arranged between the electromagnetic element and the valve stem. The electromagnetic element has magnetic attraction performance when it is powered on, and does not have magnetic attraction performance when it is powered off. The valve stem has two ends, and the end of the valve stem facing the electromagnetic element is a ferromagnet, or the entire valve stem is a ferromagnet. When the electromagnetic element is powered on, it has magnetic attraction performance, and the electromagnetic element absorbs the valve stem to open the reversing port 2121, so that the reversing flow channel can work; when the electromagnetic element is powered off, it loses its magnetic attraction performance, and the valve stem is reset under the action of the elastic member, and the sealing component 232 seals the entire reversing port 2121, so that the reversing flow channel stops working.

[0052] The sealing component 232 can be a sealing gasket, or a sealing ring structure sleeved on the end of the valve stem. Since the sealing component 232 in the present application is arranged in the valve cavity 2111, and the valve cavity 2111 is placed at the cold water end of the heat exchanger 10, the sealing component 232 does not need to be made of a special high-temperature resistant sealing material. The sealing component 232 only needs to use a conventional sealing material to ensure sealing performance and service life, which can reduce costs.

[0053] Optionally, the water pressure of the water inlet pipe 12 is greater than the water pressure of the water outlet pipe 13 , and when the sealing component 232 is closed at the reversing port 2121 , the sealing component 232 can be pressed against the reversing port 2121 under the action of the pressure difference on both sides.

[0054] In the actual operation of the heat exchanger, since the water inlet pipe 12 is generally connected to a booster pump, the booster pump is used to pressurize the cold water and pump it into the water inlet pipe 12, or the water inlet pipe 12 is directly connected to a tap water pipe, and the water pressure of the tap water pipe presses the water into the water inlet pipe 12. However, the water outlet pipe 13 is not provided with the above structure when discharging water, so the water pressure at the cold water end of the heat exchanger 10 is greater than the water pressure at the hot water end, that is, the water pressure at the water inlet pipe 12 is greater than the water pressure at the water outlet pipe 13. Therefore, the sealing component 232 located on one side of the water inlet pipe 12 will be tightly pressed against the reversing port 2121 under the pressure difference on both sides, which can further enhance the sealing effect of the sealing component 232 on the reversing port 2121.

[0055] Reference Figure 1 , Figure 5As shown, in this example, the heat exchanger 10 has a water inlet interface 111 connected to the water inlet pipe 12 , and a water outlet interface 112 connected to the water outlet pipe 13 , and the water inlet interface 111 and the water outlet interface 112 are located on the same side of the heat exchanger 10 .

[0056] Specifically, the water inlet interface 111 and the water outlet interface 112 are located on the same side of the heat exchanger 10, and the heat exchanger 10 takes in cold water and discharges hot water from the same side. The distances from the flow valve 20 to the water inlet interface 111 and the water outlet interface 112 are roughly equal, so that the length of the pipe section of the water inlet pipe 12 from the water inlet interface 111 to the flow valve 20 is roughly equal to the length of the pipe section of the water outlet pipe 13 from the water outlet interface 112 to the flow valve 20.

[0057] Of course, in other embodiments, the water inlet interface 111 and the water outlet interface 112 may also be arranged on both sides of the heat exchanger 10. When the water inlet interface 111 and the water outlet interface 112 are located on both sides of the heat exchanger 10, since a flow valve 20 needs to be arranged to connect the water inlet pipe 12 and the water outlet pipe 13, the water inlet pipe 12 and / or the water outlet pipe 13 need to be coiled and bent for a longer distance so that the parts where the flow valve 20 are arranged can be close to each other, which will cause the cold water pipe and / or the hot water pipe to be too long, affecting the internal structure arrangement of the heat exchanger 10. For this reason, in the present application, it is preferred that the water inlet interface 111 and the water outlet interface 112 are located on the same side of the heat exchanger 10.

[0058] Continue to refer to Figure 1 , Figure 5 As shown, further, the portion of the water inlet pipe 12 where the flow valve 20 is provided is bent toward the water outlet pipe 13 so that the length of the bypass pipe 22 is smaller than the distance between the water inlet interface 111 and the water outlet interface 112 .

[0059] In this embodiment, since the portion of the water inlet pipe 12 where the flow valve 20 is provided is bent toward the water outlet pipe 13, the distance between the water inlet pipe 12 and the water outlet pipe 13 at the portion where the flow valve 20 is provided is shortened compared to the distance between the water inlet interface 111 and the water outlet interface 112. Therefore, when the flow valve 20 and the water outlet pipe 13 are connected through the bypass pipe 22, the length of the bypass pipe 22 can be shortened, thereby saving materials and shortening the length of the bypass waterway.

[0060] In this embodiment, the water inlet pipe 12 has a first pipe section and a second pipe section that are bent and connected. The first pipe section is connected between the water inlet interface 111 and the second pipe section. The second pipe section is offset relative to the water inlet interface 111 toward the side close to the water outlet pipe 13, and the valve body 21 is arranged on the second pipe section.

[0061] In other embodiments, the water inlet pipe 12 has 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 water inlet interface 111, the second pipe section is bent toward the water outlet pipe 13 relative to the first pipe section, the third pipe section is extended relative to the second pipe section toward a side away from the first pipe section, and the valve body 21 is arranged on the third pipe section.

[0062] Furthermore, the first pipe section and the second pipe section are surrounded to form an installation space, the control element 23 is arranged on a side of the valve body 21 away from the water outlet pipe 13, and the control element 23 is at least partially accommodated in the installation space.

[0063] In this embodiment, since the second pipe section is offset relative to the first pipe section toward the side close to the water outlet pipe 13, the first pipe section and the second pipe section are surrounded to form an installation space. When the flow valve 20 is installed to the second pipe section, the control element 23 of the flow valve 20 is at least partially arranged in the installation space. Therefore, when the flow valve 20 is configured in the heat exchange system, the flow valve 20 will not protrude too much from the heat exchanger 10, or the flow valve 20 will not protrude from the heat exchanger 10. Therefore, when the heat exchanger 10 is installed in the water heater, the water heater has enough space to accommodate the flow valve 20, and the thickness of the water heater will not be too thick to affect the overall size of the water heater.

[0064] In this embodiment, the heat exchanger 10 also includes a heat exchanger body 11, which includes two side plates 110 arranged at relative intervals along a first direction, and a heat exchange component arranged between the two side plates 110, and the heat exchange component includes a plurality of heat exchange tubes 113 arranged along a second direction, and the two side plates 110 are respectively provided with connecting parts 115 corresponding to each heat exchange tube 113, and the plurality of heat exchange tubes 113 are connected through the plurality of connecting parts 115 to form a tortuous heat exchange channel, and the water inlet interface 111 and the water outlet interface 112 are respectively arranged at two ends of the heat exchange channel; wherein the first direction intersects with the second direction.

[0065] At the same time, the heat exchange assembly also includes a plurality of heat exchange plates 114 arranged between the two side plates 110. The heat exchange plates 114 are provided with a plurality of mounting through holes and docking portions 1141. The heat exchange plates 114 are simultaneously connected to the plurality of heat exchange tubes 113 through the plurality of mounting through holes, and adjacent heat exchange plates 114 are abutted against each other through the docking portions 1141.

[0066] Specifically, multiple docking portions 1141 are distributed on both sides of the heat exchanger 114, or multiple docking portions 1141 are distributed on only one side of the heat exchanger 114, and the docking portions 1141 are arranged in a ring on the outer peripheral side of the mounting through hole. When the heat exchanger 114 is installed on the heat exchange tube 113, adjacent heat exchanger fins 114 abut against each other through the docking portions 1141. Such an arrangement allows the heat exchanger fins 114 to be more secure during installation. At the same time, adjacent heat exchanger fins 114 can also transfer heat to each other through the docking portions 1141, so that heat can be transferred between the multiple heat exchanger fins 114, thereby achieving uniform heat distribution between the multiple heat exchanger fins 114.

[0067] Optionally, the water inlet interface 111 is formed at one end of the heat exchange channel, and the water outlet interface 112 is formed at the other end of the heat exchange channel. Specifically, the two heat exchange tubes 113 located at both ends of the heat exchange channel each have a free port that is not connected to the other heat exchange tube 113 through the docking portion 1141, and the water inlet interface 111 and the water outlet interface 112 are respectively formed at the free ports of the two heat exchange tubes 113.

[0068] The utility model also provides a water heater 1000, which includes a housing and a heat exchange system. The specific structure of the heat exchange system 100 is referred 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 described one by one here. Among them, the heat exchange system is arranged in the housing.

[0069] It should be understood that the water heater 1000 involved in the utility model includes but is not limited to a gas water heater, an electric water heater, a solar water heater, an air energy water heater, an electromagnetic eddy current water heater and a heat pump water heater, and any water heater 1000 that needs to use the above heat exchange system 100 can use the technical solution of the utility model. For ease of description, the following takes a gas water heater as an example for explanation, wherein the gas water heater can be a strong drum type gas water heater or a strong pump type gas water heater.

[0070] For example, see Figure 1 The gas water heater 1000 comprises a water heater body 2, a water circuit assembly 3 and a control valve 1. The main components of the water heater body 2 include a shell and a burner, a heat exchanger, a hot water output device, a safety device, a control panel and the like arranged in the shell.

[0071] In this embodiment, the housing includes a back shell 40 and a front cover 80 covered on the back shell 40, and the back shell 40 and the front cover 80 enclose an installation space for installing the heat exchanger 10. Among them, the back shell 40 includes a top plate arranged above the water heater, a back plate arranged at the back of the water heater, and a bottom plate arranged below the water heater, and the top plate, the back plate and the bottom plate are connected in sequence to form the back shell 40; and the front cover 80 includes side plates respectively arranged on both sides of the water heater, and a panel arranged at the front end of the water heater, and the two sides of the panel are respectively connected to the side plates to form the front cover 80. A control panel is provided on the front cover 80, and the control panel is located on the panel or on the side panel. In this embodiment, the control panel is located on the panel, and the control panel is used to control the operation and settings of the device.

[0072] A box body 30 for installing the heat exchanger body 11 is provided in the shell, and a burner is provided in the box body 30 and is roughly located below the heat exchanger body 11. When the burner is working, the high-temperature flame generated heats the heat exchange plate 114 of the heat exchanger body 11, and the heat exchange plate 114 exchanges heat to the heat exchange tube 113. After absorbing the heat, the water in the heat exchange tube 113 is discharged from the water outlet pipe 13, so that the water heater can realize the function of discharging hot water.

[0073] The shell is used as a supporting and protective component and as a carrier for installing other components. When actually used, it is installed and connected to a wall or the like. The burner is responsible for burning the gas fuel and generating a high-temperature flame. The water inlet pipe 12 is used to feed cold water into the heat exchanger body 11. The heat exchanger body 11 is used to transfer the heat generated by the combustion to the cold water to achieve the purpose of preparing hot water. The water outlet pipe 13 is used to transport the prepared hot water to a designated location, such as a shower head, bathtub, kitchen faucet, etc., for user use.

[0074] In addition, in the present application, the water heater also includes a smoke exhaust pipe 70 disposed at the top of the back shell 40, and a fan 60 disposed in the installation space. The fan 60 is located below the box body 30. When the fan 60 is working, air is sent into the burner to provide oxygen for the combustion of the burner, and the smoke generated by the combustion of the burner is driven to flow to the heat exchanger body 11 for heat exchange, and then the smoke is discharged through the smoke exhaust pipe 70. Of course, in some embodiments, the fan 60 can also be a strong exhaust fan disposed above the heat exchanger body 11. When the fan 60 is working, the smoke generated by the combustion of the burner is driven to flow to the heat exchanger body 11 for heat exchange, and then flow from the air outlet of the fan 60 to the smoke exhaust pipe 70 for discharge.

[0075] Optionally, a booster pump 50 is further provided in the housing, and the output end of the booster pump 50 is connected to the water inlet pipe 12. When the booster pump 50 is working, the water in the tap water pipe can be pumped into the water inlet pipe 12, and when the water pressure in the tap water pipeline is insufficient, the water flow in the water inlet pipe 12 is pressurized to avoid insufficient water pressure in the heat exchanger 10.

[0076] Optionally, it also includes a safety device arranged in the shell, which includes but is not limited to an oxygen sensor, a pressure controller, a temperature sensor, etc., for monitoring and protecting the system from overload, leakage, explosion and other problems.

[0077] Of course, in some other embodiments, the gas water heater 1000 may also include other auxiliary components, such as a water filter, a cleaning valve, etc., to ensure the reliability and safety of the equipment.

[0078] The above are only optional embodiments of the present invention, and do 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 inventive concept of the present invention, or directly / indirectly used 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: A heat exchanger, including a water inlet pipe and a water outlet pipe; as well as A flow valve, the flow valve comprising a valve body arranged on the water inlet pipe, a bypass pipe connecting the valve body with the water outlet pipe, and a control element arranged on the valve body, the valve body having a main flow channel connected to the water inlet pipe, the bypass pipe having a bypass flow channel connecting the main flow channel with the water outlet pipe, and the control element being used to control the water flow rate of the bypass flow channel.

2. The heat exchange system according to claim 1, characterized in that: The valve body includes a valve seat and a reversing tube body, the valve seat has a valve cavity, a water inlet port, a water outlet port and a bypass port, the water inlet port, the valve cavity and the water outlet port are connected to form the main flow channel, the reversing tube body is arranged in the valve cavity, the reversing tube body has a reversing flow channel connecting the valve cavity with the bypass port, and one end of the bypass pipe away from the water outlet pipe is connected to the bypass port.

3. The heat exchange system according to claim 2, characterized in that: The end of the reversing tube body away from the bypass tube is provided with a reversing port connected to the valve cavity, and the control element includes a driving component and a sealing component driven by the driving component, the sealing component is arranged in the valve cavity, and the driving component is used to drive the sealing component to open or close the reversing port.

4. The heat exchange system according to claim 3, characterized in that: A mounting cavity is provided on a side of the valve body away from the bypass pipe, and the driving component includes a driving body fixed at the mounting cavity, and a valve stem drivingly connected to the driving body, the valve stem is connected to the sealing component, and the driving body is used to drive the valve stem to perform telescopic movement in the axial direction to drive the sealing component to open or close the reversing port.

5. The heat exchange system according to claim 3, characterized in that: The water pressure of the water inlet pipe is greater than the water pressure of the water outlet pipe. When the sealing component is closed at the reversing port, the sealing component can be pressed against the reversing port under the action of the pressure difference on both sides.

6. The heat exchange system according to any one of claims 1 to 5, characterized in that: The heat exchanger has a water inlet interface connected to the water inlet pipe, and a water outlet interface connected to the water outlet pipe, and the water inlet interface and the water outlet interface are located on the same side of the heat exchanger.

7. The heat exchange system according to claim 6, characterized in that: The portion of the water inlet pipe where the flow valve is provided is bent toward the water outlet pipe so that the length of the bypass pipe is smaller than the distance between the water inlet interface and the water outlet interface.

8. The heat exchange system according to claim 7, characterized in that: The water inlet pipe has a first pipe section and a second pipe section that are bent and connected, the first pipe section is connected between the water inlet interface and the second pipe section, the second pipe section is offset relative to the water inlet interface toward a side close to the water outlet pipe, and the valve body is arranged on the second pipe section.

9. The heat exchange system according to claim 8, characterized in that: The first pipe section and the second pipe section are surrounded to form an installation space, the control element is arranged on a side of the valve body away from the water outlet pipe, and the control element is at least partially accommodated in the installation space.

10. A water heater, characterized in that: include: case; as well as The heat exchange system according to any one of claims 1 to 9 is arranged in the shell.

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