CN221005498U - Heat exchange system and water heater - Google Patents

Abstract

The utility model discloses a heat exchange system and a water heater, wherein the heat exchange system comprises: the heat exchanger is provided with a water inlet and a water outlet; the small flow valve comprises a valve body and a control part, wherein the valve body comprises a water inlet pipe communicated with the water inlet, a water outlet pipe communicated with the water outlet, and a bypass pipe for communicating the water inlet pipe with the water outlet pipe, the control part is arranged on the bypass pipe, and the control part is used for controlling the water flow of the bypass pipe; the water inlet, the water outlet, the water inlet pipe, the water outlet pipe and the bypass pipe are all positioned on the same side of the heat exchanger. The technical scheme of the utility model can improve the water path arrangement compactness of the heat exchange system, reduce the occupied space, be beneficial to realizing the miniaturization of the water heater, and realize the bypass flow adjustment at the same time, thereby realizing the active control of the bath water temperature of a user so as to meet different application scenes.

Description

Heat exchange systems and water heaters

Technical Field

The utility model relates to the technical field of hot water equipment, in particular to a heat exchange system and a water heater.

Background technique

In the related art, in the heat exchange system of the water heater, the water inlet and the water outlet of the heat exchanger are respectively arranged on the opposite sides of the heat exchanger, and the water inlet pipe and the water outlet pipe need to be separately connected on the opposite sides of the heat exchanger. In order to realize the bypass water mixing function, it is usually necessary to connect a longer bypass pipe between the water inlet pipe and the water outlet pipe. The pipeline layout is not compact enough, so that the entire heat exchange system occupies a large space in the shell of the water heater, resulting in a larger volume of the water heater, and the heat exchange system cannot adjust the bypass flow according to actual needs, and cannot realize active control of the user's bathing water temperature to meet different application scenarios.

Utility Model Content

The main purpose of the utility model is to propose a heat exchange system, which aims to improve the compactness of the water path layout of the heat exchange system, reduce the occupied space, and facilitate the miniaturization of the water heater. At the same time, it can realize bypass flow regulation, thereby realizing active control of the user's bathing water temperature to meet different application scenarios.

In order to achieve the above-mentioned purpose, the heat exchange system proposed in the utility model is used to be arranged in the shell of the water heater, and the heat exchange system includes:

a heat exchanger having a water inlet and a water outlet; and

A small flow valve, comprising a valve body and a control component, wherein the valve body comprises a water inlet pipe connected to the water inlet, a water outlet pipe connected to the water outlet, and a bypass pipe connecting the water inlet pipe with the water outlet pipe, and the control component is arranged in the bypass pipe, and the control component is used to control the water flow rate of the bypass pipe;

The water inlet, the water outlet, the water inlet pipe, the water outlet pipe and the bypass pipe are all located on the same side of the heat exchanger.

In one embodiment, the control component is located in the area enclosed by the water inlet pipe, the bypass pipe and the water outlet pipe.

In one embodiment, the center line of the control component is parallel to the axis of the water inlet pipe and the axis of the water outlet pipe, and is perpendicular to the windward surface of the heat exchanger.

In one embodiment, the distance between the center line of the control component and the axis of the water inlet pipe is L1, and the distance between the center line of the control component and the axis of the water outlet pipe is L2, wherein L1 is smaller than L2.

In one embodiment, the heat exchanger includes a heat exchanger body, a first connecting pipe and a second connecting pipe, one end of the first connecting pipe is connected to the heat exchanger body, and the other end is plugged into the water inlet pipe, one end of the second connecting pipe is connected to the heat exchanger body, and the other end is plugged into the water outlet pipe, the water inlet and the water outlet are provided on the same side of the heat exchanger body, the water inlet pipe is connected to the water inlet via the first connecting pipe, and the water outlet pipe is connected to the water outlet via the second connecting pipe.

In one embodiment, the first connecting pipe and the second connecting pipe are both bent and extended downward relative to the heat exchanger body, and the small flow valve is connected to the bottom ends of the first connecting pipe and the second connecting pipe.

In one embodiment, a accommodating space for accommodating a combustion module is formed below the heat exchanger body, and the small flow valve and the combustion module in the accommodating space are arranged side by side; or the small flow valve and the combustion module in the accommodating space are staggered in the up and down directions.

In one embodiment, the water inlet pipe includes a water inlet pipe body and water inlet pipe joints respectively provided at both ends of the water inlet pipe body, and the inner diameter of the water inlet pipe joint is larger than the inner diameter of the water inlet pipe body; the water outlet pipe includes a water outlet pipe body and water outlet pipe joints respectively provided at both ends of the water outlet pipe body, and the inner diameter of the water outlet pipe joint is larger than the inner diameter of the water outlet pipe body; the two ends of the bypass pipe are respectively connected to and communicate with the water inlet pipe body and the water outlet pipe body; the first connecting pipe is detachably inserted into one of the water inlet pipe joints, and the second connecting pipe is detachably inserted into one of the water outlet pipe joints.

In one of the embodiments, the valve body is provided with a connecting portion, and the connecting portion is used to be connected and fixed to the back plate of the water heater.

In one embodiment, the valve body and the connecting portion are integrally formed, and the connecting portion is connected and fixed to the back plate via a connecting piece;

And/or, the valve body and the connecting portion are plastic parts.

In one embodiment, the small flow valve also includes a flow sensor arranged on the water inlet pipe, and the flow sensor is used to detect the water inlet flow of the water inlet pipe; and/or, the small flow valve also includes a temperature sensor arranged on the water inlet pipe, and the temperature sensor is used to detect the water inlet temperature of the water inlet pipe.

The utility model also provides a water heater, comprising:

a housing; and

The heat exchange system as described above is arranged in the shell, and the small flow valve is located on one side of the heat exchanger facing the width direction of the shell.

The technical solution of the utility model is to make full use of the space on the same side of the heat exchanger by arranging the water inlet and outlet of the heat exchanger, as well as the water inlet pipe, water outlet pipe and bypass pipe of the small flow valve on the same side of the heat exchanger, so as to improve the compactness of the water path arrangement of the heat exchange system, reduce the occupied space of the heat exchange system, and when the heat exchange system is applied to the water heater, it is helpful to reduce the volume of the water heater and realize the miniaturization of the water heater. In addition, the small flow valve is also provided with a control component for controlling the water flow rate of the bypass flow channel. When applied to the water heater, the control component of the small flow valve can be electrically connected to the control system of the water heater. The control system sends corresponding control instructions to the control component according to the working state of the water heater, and then the water flow rate of the bypass flow channel can be controlled by the control component, so that the bypass mixed water volume of the water heater can be adjusted according to the actual working conditions, thereby realizing the active control of the user's bathing water temperature to meet different application scenarios.

BRIEF DESCRIPTION OF THE DRAWINGS

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.

FIG1 is a schematic structural diagram of an embodiment of a heat exchange system of the present utility model;

FIG2 is a schematic diagram of the structure of a small flow valve of the heat exchange system in FIG1 ;

FIG3 is a front view of the small flow valve in FIG2 ;

FIG4 is a schematic cross-sectional view of the small flow valve in FIG2 ;

FIG5 is a schematic structural diagram of an embodiment of the water heater of the present utility model.

Description of Figure Numbers:

Label name Label name 1000 Water Heater 201a First water inlet port 100 Heat exchange system 201b First water outlet port 10 Heat Exchanger 202 Outlet channel 101 water intake 202a Second water inlet port 102 Outlet 202b Second water outlet port 103 Interval area 203 Bypass flow channel 104 Accommodation space 211 Water inlet pipe 11 Heat exchanger body 211a Inlet pipe body 111 End Plate 211b Water inlet pipe connector 1111 Connectivity 212 Outlet pipe 112 Heat exchange components 212a Outlet pipe body 12 First connecting pipe 212b Water outlet pipe connector 13 Second connecting pipe 213 Bypass pipe 20 Small flow valve twenty two Control components twenty one Valve body 200 Combustion module 201 Inlet channel 300 Fan 400 Cold water inlet pipe 500 Hot water output pipe

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 ways

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.

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

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

The utility model provides a heat exchange system 100 , which is used to be arranged in a shell of a water heater 1000 .

Please refer to FIG. 1 . In one embodiment of the utility model, the heat exchange system 100 includes a heat exchanger 10 and a small flow valve 20. The heat exchanger 10 has a water inlet 101 and a water outlet 102; the small flow valve 20 includes a valve body 21 and a control component 22. The valve body 21 includes a water inlet pipe 211 connected to the water inlet 101, a water outlet pipe 212 connected to the water outlet 102, and a bypass pipe 213 connecting the water inlet pipe 211 and the water outlet pipe 212. The control component 22 is arranged on the bypass pipe 213, and the control component 22 is used to control the water flow rate of the bypass pipe 213. The water inlet 101, the water outlet 102, the water inlet pipe 211, the water outlet pipe 212 and the bypass pipe 213 are all located on the same side of the heat exchanger 10.

In this embodiment, the water inlet 101 and the water outlet 102 of the heat exchanger 10 are located on the same side, and the small flow valve 20 is located on the side of the heat exchanger 10 where the water inlet 101 and the water outlet 102 are provided. According to the direction of the heat exchange channel inside the heat exchanger 10, the water inlet 101 and the water outlet 102 can be arranged on the same side of the length direction (such as the left-right direction) of the heat exchanger 10; or the water inlet 101 and the water outlet 102 can be arranged on the same side of the width direction (such as the front-back direction) of the heat exchanger 10; or the water inlet 101 and the water outlet 102 can be arranged on the same side of the height direction (such as the up-down direction) of the heat exchanger 10. By arranging the water inlet 101 and the water outlet 102 on the same side of the heat exchanger 10, the arrangement positions of the water inlet 101 and the water outlet 102 are more concentrated, so as to facilitate the small flow valve 20 to be connected to the water inlet 101 and the water outlet 102 at the same time.

Please refer to Figures 1 to 4. The water inlet pipe 211, the water outlet pipe 212 and the bypass pipe 213 of the small flow valve 20 are connected to each other to form an H-shaped valve body 21, which has a simple structure and is easy to manufacture. The valve body 21 has a regular overall structure and is suitable for connecting with the pipeline of the heat exchanger 10. The water inlet pipe 211 forms an inlet flow channel 201, the water outlet pipe 212 forms an outlet flow channel 202, and the bypass pipe 213 forms a bypass flow channel 203. The two ends of the water inlet pipe 211 are respectively provided with a first water inlet port 201a and a first water outlet port 201b connected to the water inlet flow channel 201, and the two ends of the water outlet pipe 212 are respectively provided with a second water inlet port 202a and a second water outlet port 202b connected to the water outlet flow channel 202. The first water outlet port 201b is connected to the water inlet 101, and the second water inlet port 202a is connected to the water outlet 102. The control component 22 is arranged on the peripheral wall of the bypass pipe 213 so as to control the bypass flow channel 203. In this way, when the heat exchange system 100 is working, cold water is transported to the heat exchanger 10 through the water inlet flow channel 201 and the water inlet 101 for heat exchange, and the hot water in the heat exchanger 10 is output to the water outlet flow channel 202 through the water outlet 102. At the same time, the cold water in the water inlet flow channel 201 can also be transported to the water outlet flow channel 202 through the bypass flow channel 203, thereby realizing the bypass water mixing function. The water flow rate of the bypass flow channel 203 can be controlled by the control component 22. It should be noted that the control component 22 controls the water flow rate of the bypass flow channel 203, which should be understood as the water flow rate through the bypass flow channel 203 can be changed to a certain extent under the control of the control component 22. The water flow change here can be a change between no flow and flow, or a change between a large flow and a small flow when there is flow. Among them, the control component 22 includes but is not limited to the use of solenoid valves, proportional valves, etc.

The technical solution of the present invention is to arrange the water inlet 101 and the water outlet 102 of the heat exchanger 10, and the water inlet pipe 211, the water outlet pipe 212 and the bypass pipe 213 of the small flow valve 20 on the same side of the heat exchanger 10, so as to make full use of the space on the same side of the heat exchanger 10, to improve the compactness of the water path arrangement of the heat exchange system 100, and to reduce the occupied space of the heat exchange system 100. When the heat exchange system 100 is applied to the water heater 1000, it is helpful to reduce the volume of the water heater 1000 and realize the miniaturization of the volume of the water heater 1000. In addition, the small flow valve 20 is also provided with a control component 22 for controlling the water flow rate of the bypass flow channel 203. When applied to the water heater 1000, the control component 22 of the small flow valve 20 can be electrically connected to the control system of the water heater 1000. The control system sends corresponding control instructions to the control component 22 according to the working state of the water heater 1000, and then the water flow rate of the bypass flow channel 203 can be controlled through the control component 22, so that the bypass mixed water volume of the water heater 1000 can be adjusted according to the actual working conditions to meet different application scenarios. The specific application scenarios will be introduced in the part about the water heater 1000 below, and will not be described in detail here.

Furthermore, the control component 22 is located in the area enclosed by the water inlet pipe 211, the bypass pipe 213 and the water outlet pipe 212. Specifically, the two ends of the bypass pipe 213 are respectively connected to the middle of the water inlet pipe 211 and the middle of the water outlet pipe 212, so that the valve body 21 of the small flow valve 20 presents an H valve structure, and the control component 22 is arranged on the peripheral wall of the bypass pipe 213, and the control component 22 is located between the water inlet pipe 211 and the water outlet pipe 212. In this way, the cavity area constructed by the small flow valve 20 itself can be fully utilized to accommodate the control component 22, so as to further improve the compactness of the overall structure and reduce the occupied space. Optionally, the control component 22 is arranged on the side of the bypass pipe 213 facing the heat exchanger 10.

As shown in FIG. 1 and FIG. 3 , in one embodiment, the center line of the control component 22 is parallel to the axis of the water inlet pipe 211 and the axis of the water outlet pipe 212 , and is perpendicular to the windward surface of the heat exchanger 10 .

In this embodiment, the windward side of the heat exchanger 10 specifically refers to the side of the heat exchanger 10 opposite to the combustion module 200. The center line of the control component 22 is parallel to the axis of the water inlet pipe 211 and the axis of the water outlet pipe 212, so that the extension directions of the water inlet pipe 211, the water outlet pipe 212 and the control component 22 are consistent, making the structural layout of the entire small flow valve 20 more regular, and the extension direction of the control component 22 is perpendicular to the windward side of the heat exchanger 10, so that the arrangement of the small flow valve 20 and the heat exchanger 10 is more regular, which is conducive to reducing the occupied space.

Further, as shown in FIG3 , the distance between the center line of the control component 22 and the axis of the water inlet pipe 211 is L1, and the distance between the center line of the control component 22 and the axis of the water outlet pipe 212 is L2, wherein L1 is smaller than L2. In this way, the distance between the control component 22 and the water inlet pipe 211 is smaller, while the distance between the control component 22 and the water outlet pipe 212 is farther. When applied to the water heater 1000, the water inlet pipe 211 is a cold water pipe for conveying cold water, and the water outlet pipe 212 is a hot water pipe for conveying hot water. In this way, the control component 22 can be arranged away from the hot water pipe (i.e., the water outlet pipe 212), so as to avoid the heat radiated by the hot water pipe from damaging the control component 22. At the same time, the control component 22 is arranged closer to the cold water pipe (i.e., the water inlet pipe 211), which is conducive to the heat dissipation of the control component 22, thereby extending the service life of the control component 22.

Optionally, the distance between the axis of the water inlet pipe 211 and the axis of the water outlet pipe 212 is L3, wherein L3 is less than 100 mm. In this way, the effect of the length of the bypass pipe 213 and the assembly deformation on the bypass ratio and the bypass response speed can be reduced. Specifically, the distance between the water inlet pipe 211 and the water outlet pipe 212 is shorter, so that the length of the bypass pipe 213 is shortened, and the length of the bypass flow channel 203 can be shortened, so that the cold water in the water inlet flow channel 201 can be quickly transported to the water outlet flow channel 202 through the shorter bypass flow channel 203 to mix with the hot water in the water outlet flow channel 202, thereby ensuring a faster bypass response speed and a more accurate bypass ratio. In addition, the shortened length of the bypass pipe 213 is conducive to improving the structural stability of the entire valve body 21, and avoiding the deformation of the bypass pipe 213 after long-term use, which has an adverse effect on the bypass ratio and the bypass response speed. Among them, L3 can be designed to be 90mm, 80mm, 70mm, etc. as needed.

In one embodiment, the heat exchanger 10 includes a heat exchanger body 11, a first connecting pipe 12 and a second connecting pipe 13, one end of the first connecting pipe 12 is connected to the heat exchanger body 11, and the other end is plugged into the water inlet pipe 211, one end of the second connecting pipe 13 is connected to the heat exchanger body 11, and the other end is plugged into the water outlet pipe 212, the water inlet 101 and the water outlet 102 are provided on the same side of the heat exchanger body 11, the water inlet pipe 211 is connected to the water inlet 101 via the first connecting pipe 12, and the water outlet pipe 212 is connected to the water outlet 102 via the second connecting pipe 13.

In this embodiment, the small flow valve 20 is connected to the heat exchanger body 11 through the first connecting pipe 12 and the second connecting pipe 13, and the first connecting pipe 12 and the second connecting pipe 13 include but are not limited to straight pipes, curved pipes, or a combination of straight pipes and curved pipes. The lengths of the first connecting pipe 12 and the second connecting pipe 13 can be designed according to actual needs, so that the small flow valve 20 can be arranged as far away from the heat exchanger body 11 as possible, thereby avoiding the heat radiated by the heat exchanger body 11 from damaging the valve body 21 and the control component 22 of the small flow valve 20, which is conducive to extending the service life of the small flow valve 20. In addition, the first connecting pipe 12 and the water inlet pipe 211 are plug-in matched, and the second connecting pipe 13 and the water outlet pipe 212 are assembled in the form of plug-in matching, and the assembly structure is simple, which can improve the assembly efficiency.

Optionally, as shown in FIG. 1 , a spacing area 103 is formed between the first connecting pipe 12 and the second connecting pipe 13 , and the control component 22 is disposed on a side of the bypass pipe 213 facing the spacing area 103 to further enhance the compactness of the overall structure and reduce occupied space.

In order to prevent the heat radiated by the heat exchanger body 11 from damaging the small flow valve 20, in one embodiment, the distance between the small flow valve 20 and the heat exchanger body 11 is not less than 60 mm. In this way, it is possible to ensure that a sufficient distance is reserved between the small flow valve 20 and the heat exchanger body 11, so as to prevent the valve body 21 and the control component 22 of the small flow valve 20 from being damaged by the heat radiation of the heat exchanger body 11 for a long time, thereby extending the service life of the small flow valve 20. For example, the distance between the small flow valve 20 and the heat exchanger body 11 can be 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, etc.

As shown in FIG. 1 , in one embodiment, the first connecting pipe 12 and the second connecting pipe 13 are both bent and extended downward relative to the heat exchanger body 11 , and the small flow valve 20 is connected to the bottom ends of the first connecting pipe 12 and the second connecting pipe 13 .

In this embodiment, the first connecting pipe 12 and the second connecting pipe 13 are both extended downward from the same side of the heat exchanger body 11 (that is, the side of the heat exchanger body 11 with the water inlet 101 and the water outlet 102), and the axis of the first connecting pipe 12 is substantially parallel to the axis of the second connecting pipe 13, so that the arrangement of the first connecting pipe 12 and the second connecting pipe 13 is more regular, which is conducive to saving space. The valve body 21 of the small flow valve 20 is connected to the bottom ends of the first connecting pipe 12 and the second connecting pipe 13, so that the first connecting pipe 12, the second connecting pipe 13 and the small flow valve 20 are all located on the same side of the heat exchanger body 11, which is conducive to making full use of the same side space of the heat exchange system 100, so as to further reduce the volume when applied to the water heater 1000. In addition, the small flow valve 20 is located at a lower position on one side of the heat exchanger body 11 where the water inlet 101 and the water outlet 102 are provided. In this way, the small flow valve 20 is arranged away from the heat exchanger body 11, thereby preventing the heat radiated by the heat exchanger body 11 from damaging the valve body 21 and the control component 22 of the small flow valve 20, which is beneficial to extending the service life of the small flow valve 20.

Please refer to Figure 1. In one embodiment, a accommodating space 104 for accommodating a combustion module 200 is formed below the heat exchanger body 11, and the small flow valve 20 and the combustion module 200 in the accommodating space 104 are arranged side by side; or the small flow valve 20 and the combustion module 200 in the accommodating space 104 are staggered in the up and down directions.

In this embodiment, the heat exchanger 10 includes a heat exchanger body 11 extending transversely, and a first connecting pipe 12 and a second connecting pipe 13 extending downward from the same side of the heat exchanger body 11. The small flow valve 20 is connected to the bottom ends of the first connecting pipe 12 and the second connecting pipe 13, so that the heat exchange system 100 as a whole presents a similar inverted "L"-shaped structure. The heat exchanger 10 and the small flow valve 20 enclose a semi-open accommodation space 104, and the accommodation space 104 can be used to accommodate the combustion module 200 of the water heater 1000. When the heat exchange system 100 is applied to the water heater 1000, the combustion module 200 is accommodated in the accommodation space 104, so that the combustion module 200 and the heat exchange system 100 are more compactly matched, which is conducive to achieving full utilization of space and reducing the overall volume of the water heater 1000. At the same time, the high-temperature flue gas generated by the combustion module 200 flows upward and can fully contact with the heat exchanger body 11 located above for heat exchange, thereby improving the heating efficiency. Optionally, the small flow valve 20 and the combustion module 200 are staggered in the up and down directions, so that the small flow valve 20 can be kept as far away from the heat radiation area of the combustion module 200 as possible, thereby avoiding the heat radiated by the heat exchanger body 11 from damaging the valve body 21 and the control component 22 of the small flow valve 20, which is beneficial to extending the service life of the small flow valve 20.

In order to facilitate the assembly and disassembly of the first connecting pipe 12 and the second connecting pipe 13 with the water inlet pipe 211 and the water outlet pipe 212, please refer to Figures 1 and 2. In one embodiment, the water inlet pipe 211 includes a water inlet pipe body 211a, and water inlet pipe joints 211b respectively provided at both ends of the water inlet pipe body 211a, and the inner diameter of the water inlet pipe joint 211b is larger than the inner diameter of the water inlet pipe body 211a; the water outlet pipe 212 includes a water outlet pipe body 212a, and The outlet pipe joints 212b are respectively arranged at both ends of the outlet pipe body 212a, and the inner diameter of the outlet pipe joints 212b is larger than the inner diameter of the outlet pipe body 212a; the two ends of the bypass pipe 213 are respectively connected to and communicated with the inlet pipe body 211a and the outlet pipe body 212a; the first connecting pipe 12 is detachably inserted into one of the inlet pipe joints 211b, and the second connecting pipe 13 is detachably inserted into one of the outlet pipe joints 212b. Optionally, the inlet pipe joint 211b is provided with a plug hole for inserting a pin, and when the first connecting pipe 12 and the inlet pipe joint 211b are plugged into place, the pin is inserted into the plug hole to lock and fix the first connecting pipe 12 and the inlet pipe joint 211b. Optionally, the water outlet pipe joint 212b is provided with a socket for inserting a plug. When the second connecting pipe 13 and the water outlet pipe joint 212b are plugged into place, the plug is inserted into the socket to lock and fix the second connecting pipe 13 and the water outlet pipe joint 212b.

As shown in Figure 1, in one embodiment, the heat exchanger body 11 includes two end plates 111 that are opposite to each other and spaced apart along a first direction, and a heat exchange component 112 arranged between the two end plates 111, the heat exchange component 112 includes a plurality of heat exchange tubes arranged side by side along a second direction, the two end plates 111 are respectively provided with connecting parts 1111 corresponding to each of the heat exchange tubes, and the plurality of heat exchange tubes are connected through the plurality of connecting parts 1111 to form a tortuous heat exchange channel, the water inlet 101 and the water outlet 102 are both provided on one of the end plates 111, and the heat exchange channel connects the water inlet 101 and the water outlet 102; wherein, the first direction intersects with the second direction.

In this embodiment, the first direction may be the length direction of the heat exchanger body 11 (e.g., the left-right direction), and the second direction may be the width direction of the heat exchanger body 11 (e.g., the front-back direction). The two end plates 111 cooperate with each other to support the heat exchange assembly 112, and the connecting parts 1111 on the two end plates 111 also act as a water box to connect multiple independent heat exchange tubes in series to form a tortuous heat exchange channel; in this way, there is no need to set a bend structure on the outside of the two end plates 111 to connect two adjacent heat exchange tubes, which can simplify the assembly process and improve production efficiency. Specifically, each end plate 111 includes a first plate body and a second plate body that cooperate with each other, wherein the first plate body is located on the side of the second plate body facing the heat exchange assembly 112. The second plate body is provided with a convex bulge that arches toward the side away from the first plate body, and the convex bulge and the first plate body are enclosed to form a connecting part 1111, and the interior of the connecting part 1111 is hollow, and the first plate body is provided with a through hole for inserting the end of the heat exchange tube into the cavity of the connecting part 1111. The first plate body and the second plate body are fixed by, but not limited to, welding, screw connection, etc. Optionally, the periphery of the first plate body is provided with a flange, and the periphery of the second plate body is provided with a folded edge opposite to the flange of the first plate body, and the folded edge and the flange are abutted and matched to improve the assembly reliability of the first plate body and the second plate body.

A plurality of heat exchange tubes are arranged in a single row of heat exchange tube groups along the width direction (e.g., front-to-back direction) of the heat exchanger body 11, and the single row of heat exchange tube groups is perpendicular to the flue gas flow direction, so that the high-temperature flue gas generated by the combustion module 200 flows from bottom to top and can fully contact the single row of heat exchange tube groups for heat exchange, thereby improving the heat exchange efficiency. Optionally, the heat exchange assembly 112 further includes a fin group arranged between the two end plates 111, and each heat exchange tube is inserted into the fin group. By providing the fin group, the heat exchange area can be further increased, thereby improving the heat exchange efficiency.

In one embodiment, the valve body 21 is provided with a connection portion, and the connection portion is used to be connected and fixed with the back plate of the water heater 1000. Specifically, after the water heater 1000 is installed on the wall, the back plate of the shell of the water heater 1000 is arranged close to the wall, and the valve body 21 is connected and fixed with the back plate through the connection portion, so that the installation of the small flow valve 20 is more stable and reliable, and the small flow valve 20 is prevented from shaking during the operation of the water heater 1000, thereby ensuring the working reliability of the small flow valve 20.

Furthermore, the valve body 21 and the connecting part are integrally formed, and the connecting part is connected and fixed to the back plate through a connecting piece. The valve body 21 and the connecting part are integrally formed, so that the structural strength of the connecting part is higher and it is easy to produce. The connecting part is connected and fixed to the back plate through a connecting piece (such as a screw, a bolt, a latch, etc.), the assembly is simple and convenient, and the connection is stable and reliable. Optionally, the valve body 21 and the connecting part are plastic parts, so that the valve body 21 and the connecting part can be integrally injection molded, and the manufacturing process is simple.

On the basis of the above embodiments, in one of the embodiments, the small flow valve 20 also includes a flow sensor arranged on the water inlet pipe 211, and the flow sensor is used to detect the water inlet flow of the water inlet pipe 211; and/or, the small flow valve 20 also includes a temperature sensor arranged on the water inlet pipe 211, and the temperature sensor is used to detect the water inlet temperature of the water inlet pipe 211.

In this embodiment, the water inlet pipe 211 of the small flow valve 20 can be used as a mounting carrier for the flow sensor and/or the temperature sensor, so that the small flow valve 20 has a higher degree of integration and more diversified functions. It is no longer necessary to install a flow sensor and/or a temperature sensor on the cold water input pipe 400 of the water heater 1000, which is conducive to reducing the number of parts to be assembled, improving assembly efficiency, and reducing costs. At the same time, it can also reduce the risk of water leakage caused by the assembly of parts. When the heat exchange system 100 is applied to the water heater 1000, the installation position of the small flow valve 20 can be set closer to the water inlet end of the cold water input pipe 400 of the water heater 1000 (that is, replacing the original installation position of the flow sensor and/or the temperature sensor), so that the small flow valve 20 is away from the heat radiation area formed by the combustion module 200, avoiding damage to the electronic components integrated in the small flow valve 20 due to heat radiation, and extending the service life of the small flow valve 20.

The utility model also proposes a water heater 1000, which includes a heat exchange system 100. The specific structure of the heat exchange system 100 refers to the above-mentioned embodiment. Since the water heater 1000 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

As shown in Fig. 1 and Fig. 5, in one embodiment, the water heater 1000 includes a heat exchange system 100, a combustion module 200, a fan 300, a cold water input pipe 400 and a hot water output pipe 500. The heat exchange system 100 includes a heat exchanger 10 and a small flow valve 20 connected to the heat exchanger 10, the combustion module 200 is arranged below the heat exchanger 10, the fan 300 is arranged below the combustion module 200, the cold water input pipe 400 is connected to the water inlet end of the water inlet pipe 211 of the small flow valve 20, and the hot water output pipe 500 is connected to the water outlet end of the water outlet pipe 212 of the small flow valve 20. The control component 22 of the small flow valve 20 can be electrically connected to the control system of the water heater 1000 in a wired or wireless manner. The control system sends corresponding control instructions to the control component 22 according to the working state of the water heater 1000, and then the water flow rate of the bypass flow channel 203 can be controlled through the control component 22, so that the bypass mixed water volume of the water heater 1000 can be adjusted according to the actual working conditions to meet different application scenarios, thereby effectively improving the problems of the traditional water heater 1000 such as the start-stop constant temperature difference, high vaporization noise, and low thermal efficiency.

For example, when the water heater 1000 is working normally, the control component 22 controls the closing of the bypass flow channel 203. At this time, the highest temperature in the heat exchange tube of the heat exchanger 10 is the set temperature of the water heater 1000. In this way, the risk of vaporization noise can be greatly reduced, and the thermal efficiency of the heat exchanger 10 will not be affected. The service life of the heat exchanger 10 can also be extended.

After the water supply to the water heater 1000 is stopped, the control component 22 controls the bypass flow channel 203 to be opened, and can close the bypass flow channel 203 within a few seconds of startup according to the actual working conditions. At this time, part of the cold water in the water inlet flow channel 201 is transported to the water outlet flow channel 202 via the bypass flow channel 203, and the cold water is mixed with the high-temperature water in the water outlet flow channel 202, which can effectively reduce the temperature rise when the water supply is stopped; because part of the cold water is diverted from the bypass flow channel 203, the water flow rate transported from the water inlet flow channel 201 to the heat exchanger 10 is reduced, thereby reducing the overshoot at startup.

In addition, it is also possible to determine whether to open the bypass during normal combustion based on actual working conditions. For example, in winter, when the temperature difference between the inlet and outlet water is large and needs to be quickly heated to the set temperature, the control component 22 controls the closure of the bypass flow channel 203. This not only improves the heating speed but also ensures that it can be heated to the set temperature. When the water is stopped and restarted, the bypass time can be reduced, thereby reducing the overshoot. When a low-temperature bath is needed in summer, the control component 22 controls the opening of the bypass flow channel 203. At this time, the minimum temperature rise of the water heater 1000 can be reduced to prevent the water temperature from being too hot during bathing, and the water temperature in the heat exchange tube can be increased, thereby increasing the flue gas temperature and avoiding the risk of condensation water.

The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly/indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims (12)

1. A heat exchange system, used to be arranged in a shell of a water heater, characterized in that the heat exchange system comprises: a heat exchanger having a water inlet and a water outlet; and A small flow valve, comprising a valve body and a control component, wherein the valve body comprises a water inlet pipe connected to the water inlet, a water outlet pipe connected to the water outlet, and a bypass pipe connecting the water inlet pipe with the water outlet pipe, and the control component is arranged in the bypass pipe, and the control component is used to control the water flow rate of the bypass pipe; The water inlet, the water outlet, the water inlet pipe, the water outlet pipe and the bypass pipe are all located on the same side of the heat exchanger. 2. The heat exchange system according to claim 1 is characterized in that the control component is located in an area enclosed by the water inlet pipe, the bypass pipe and the water outlet pipe. 3. The heat exchange system according to claim 2, characterized in that the center line of the control component is parallel to the axis of the water inlet pipe and the axis of the water outlet pipe, and is perpendicular to the windward surface of the heat exchanger. 4. The heat exchange system according to claim 3 is characterized in that the distance between the center line of the control component and the axis of the water inlet pipe is L1, and the distance between the center line of the control component and the axis of the water outlet pipe is L2, wherein L1 is smaller than L2. 5. The heat exchange system according to claim 1 is characterized in that the heat exchanger comprises a heat exchanger body, a first connecting pipe and a second connecting pipe, one end of the first connecting pipe is connected to the heat exchanger body, and the other end is plugged into the water inlet pipe, one end of the second connecting pipe is connected to the heat exchanger body, and the other end is plugged into the water outlet pipe, the water inlet and the water outlet are provided on the same side of the heat exchanger body, the water inlet pipe is connected to the water inlet via the first connecting pipe, and the water outlet pipe is connected to the water outlet via the second connecting pipe. 6. The heat exchange system according to claim 5, characterized in that the first connecting pipe and the second connecting pipe are both bent and extended downward relative to the heat exchanger body, and the small flow valve is connected to the bottom ends of the first connecting pipe and the second connecting pipe. 7. The heat exchange system as described in claim 6 is characterized in that a accommodating space for accommodating a combustion module is formed below the heat exchanger body, and the small flow valve and the combustion module in the accommodating space are arranged side by side; or the small flow valve and the combustion module in the accommodating space are staggered in the up and down directions. 8. The heat exchange system as described in claim 5 is characterized in that the water inlet pipe includes a water inlet pipe body and water inlet pipe joints respectively provided at both ends of the water inlet pipe body, and the inner diameter of the water inlet pipe joint is larger than the inner diameter of the water inlet pipe body; the water outlet pipe includes a water outlet pipe body and water outlet pipe joints respectively provided at both ends of the water outlet pipe body, and the inner diameter of the water outlet pipe joint is larger than the inner diameter of the water outlet pipe body; the two ends of the bypass pipe are respectively connected to and communicate with the water inlet pipe body and the water outlet pipe body; the first connecting pipe is detachably inserted into one of the water inlet pipe joints, and the second connecting pipe is detachably inserted into one of the water outlet pipe joints. 9. The heat exchange system according to claim 1, characterized in that the valve body is provided with a connecting portion, and the connecting portion is used to be connected and fixed to the back plate of the water heater. 10. The heat exchange system according to claim 9, characterized in that the valve body and the connecting portion are integrally formed, and the connecting portion is connected and fixed to the back plate via a connecting piece; And/or, the valve body and the connecting portion are plastic parts. 11. The heat exchange system according to any one of claims 1 to 10, characterized in that the small flow valve further comprises a flow sensor provided on the water inlet pipe, and the flow sensor is used to detect the water inlet flow of the water inlet pipe; And/or, the small flow valve further includes a temperature sensor disposed on the water inlet pipe, and the temperature sensor is used to detect the inlet water temperature of the water inlet pipe. 12. A water heater, comprising: a housing; and The heat exchange system according to any one of claims 1 to 11 is arranged in the shell, and the small flow valve is located on a side of the heat exchanger facing the width direction of the shell.