CN114111048A

CN114111048A - Heat exchanger and water heating apparatus

Info

Publication number: CN114111048A
Application number: CN202010899104.6A
Authority: CN
Inventors: 李茂照; 黄官贤; 梁国荣; 刘继锋
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2022-03-01

Abstract

An embodiment of the present invention provides a heat exchanger and a hot water apparatus, wherein the heat exchanger includes: the heat exchanger body is provided with a water outlet; and one end of the water outlet pipe is connected with the water outlet, and a buffer part is formed in the water outlet pipe and used for reducing the flow velocity of fluid from the water outlet. By the technical scheme, the condition of temperature rise and temperature drop when a user turns off water and starts again can be obviously improved, the constant temperature performance of the hot water is maintained, and the user experience is better; compared with the mode of additionally arranging a bypass pipe on the heat exchanger or additionally arranging a bypass pipeline on the water outlet pipe, the technical scheme has low cost and small occupied space.

Description

Heat exchanger and water heating apparatus

Technical Field

The embodiment of the invention relates to the technical field of water heating devices, in particular to a heat exchanger and a water heating device.

Background

At present, the problems of temperature rise and temperature drop of a water heater in the using process are common. After hot water is used up, the water flow is stopped, the water in the pipeline can be continuously heated by the waste heat of the pipeline, when the water flow is started again, the water temperature of the water flow which just starts to flow out can be higher than the temperature set by a user, the user can be scalded, and the temperature rise is generated; when hot water is needed, water flow is started again, and the water heater needs a certain time for heating, so that water which is not ready for heating and has a lower temperature flows out, and the water temperature is obviously lower than the temperature set by a user, namely the temperature drop occurs.

In order to improve the current situation of 'temperature rise and temperature drop', a bypass pipe is generally additionally arranged on a heat exchanger or a bypass pipe is additionally arranged on a water outlet pipe, but the improvement effect is not obvious.

Disclosure of Invention

To solve at least one of the above technical problems, an object of an embodiment of the present invention is to provide a heat exchanger.

It is another object of an embodiment of the present invention to provide a hot water apparatus having the above heat exchanger.

To achieve the above object, an embodiment of a first aspect of the present invention provides a heat exchanger, including: the heat exchanger body is provided with a water outlet; and one end of the water outlet pipe is connected with the water outlet, and a buffer part is formed in the water outlet pipe and used for reducing the flow velocity of fluid from the water outlet.

The heat exchanger provided by the invention comprises a heat exchanger body and a water outlet pipe, wherein the water outlet is formed in the heat exchanger body, and one end of the water outlet pipe is connected with the water outlet. Wherein, the water outlet can be arranged at the top, the bottom or the side of the heat exchanger. The water outlet pipe can be a hard pipe or a hose, and the water outlet pipe is made of high-temperature-resistant materials.

Furthermore, a buffer part is formed in the water outlet pipe, and the flow speed of the fluid is reduced when the fluid flows through the buffer part. When a user needs to use hot water, firstly, the water is heated through the heat exchanger, then the water flow is started, at the moment, a part of water flow in the water outlet pipe is not ready to be heated and has lower temperature, a part of water flow is heated in the heat exchanger and has higher temperature, the two water flows are primarily mixed in the water outlet pipe, when the water flows through the buffer part, the flow speed is reduced, the time of the water flow flowing out of the water outlet end is prolonged, the two water flows can be further mixed in the buffer part, the water flow with higher temperature is neutralized with the temperature of the water flow with lower temperature, and the water flow with lower temperature only occupies a small part, so the water flow can be quickly flowed out of the heat exchanger, the temperature of the mixed water flow flowing out of the water outlet end is slightly lower than the preset temperature of the user at the moment, then the water temperature reaches the preset temperature in a short time, namely, a user goes through a process of 'firstly reducing the temperature and then increasing the temperature', but the range of the range lower than the preset temperature is obviously reduced and the time of reaching the preset temperature is also obviously shortened by arranging the buffer part; after the hot water is used, for example, after the hot water bath is finished, the water flow is stopped, because the hot water is just used, the temperature of the water outlet pipe is raised by the high-temperature water flow through heat transfer, the water flow entering the water outlet pipe after the water flow is stopped can be raised by the heat transfer temperature under the residual heat of the water outlet pipe, after the water flow is restarted, two parts of water flow exist in the water outlet pipe, one part of water flow is higher in temperature, the other part of water flow is lower in temperature after entering the water outlet pipe, the two parts of water flow can be primarily mixed, the temperature is neutralized, the flow speed is reduced after the two parts of water flow pass through the buffer part, the movement time in the water outlet pipe is prolonged, the mixing can be further carried out, and because the part of the water flow with higher temperature only occupies a small part, the part of water flow can be rapidly reduced by the water flow with lower temperature entering the water flow with lower temperature in the water outlet pipe, therefore, the water temperature of the mixed water flow flowing out of the water outlet end can be slightly higher than the preset temperature of the user instantly, and then can be recovered to the preset temperature of the user quickly, namely, the user experiences a process of 'temperature rise before temperature drop', and by arranging the buffer part, the range of the amplitude initially higher than the preset temperature can be obviously reduced, and the time for recovering to the preset temperature can be also obviously shortened.

In a word, the buffer part is arranged, so that the condition of temperature rise and temperature drop when a user turns off water and starts again can be obviously improved, the constant temperature performance of hot water is maintained, and the user experience is better; compared with the mode of additionally arranging a bypass pipe on the heat exchanger or additionally arranging a bypass pipeline on the water outlet pipe, the technical scheme has low cost and small occupied space.

In addition, the technical scheme provided by the invention can also have the following additional technical characteristics:

in the above technical solution, the outlet pipe includes: the water receiving section is communicated with the water outlet, and the pipe diameter of the water receiving section is the same as the caliber of the water outlet; the pipe expanding section is connected with the water receiving section, and the pipe diameter of the pipe expanding section is larger than that of the water receiving section; the connecting section is connected with the pipe expanding section, water flowing out of the water outlet is discharged outwards after sequentially passing through the water receiving section, the pipe expanding section and the connecting section, and the pipe expanding section forms a buffer part.

In the technical scheme, the water outlet pipe comprises a water receiving section, a pipe expanding section and a connecting section. Wherein, the water receiving section is communicated with the water outlet, the water receiving section and the water outlet can be fixedly connected or detachably connected, and the detachable connection mode can be threaded connection, buckle connection and the like. The pipe diameter of the water receiving section is the same as the caliber of the water outlet, so that the flow speed of the fluid at the water outlet is consistent with that of the fluid at the water receiving section. The water receiving section, the pipe expanding section and the connecting section can be detachably connected, so that one part can be conveniently installed and detached, and replacement is facilitated; or all the components can be fixedly connected together, namely the three components are integrally cast and formed, and the processing is convenient.

Furthermore, the pipe diameter of the pipe expanding section is larger than that of the water receiving section, the flow speed of fluid in the water outlet pipe flowing through the position of the pipe expanding section can be reduced, so that a buffer part is formed at the pipe expanding section, the flow speed of the water flowing through the pipe expanding section can be reduced, the time of the water flowing out of the water outlet end is prolonged, the water flowing at a higher temperature and the water flowing at a lower temperature can be well mixed, and the temperature is neutralized and then discharged out of the water outlet end. And because the pipe diameter of the pipe expanding section is larger than that of the water receiving section, the pipe expanding section has larger volume than the water receiving section with the same length, so that after the water flow with higher temperature and the water flow with lower temperature are firstly preliminarily mixed in the water receiving section, the flow speed of the water flow flowing through the pipe expanding section is reduced, the mixing space is enlarged, the two water flows can be fully mixed to neutralize the temperature, and the conditions of temperature rise and temperature drop can be obviously improved.

It should be further noted that the pipe diameter of the connecting section may be smaller than that of the pipe expanding section, that is, the water flows through the connecting section after being mixed by the pipe expanding section, and can return to the normal flow rate for the user to use; the pipe diameter of linkage segment also can be equal to or be greater than the pipe diameter that expands the pipeline section, and the linkage segment also forms buffering portion promptly, and rivers all can reduce the velocity of flow when expanding pipeline section and linkage segment, the time of extension rivers discharge outlet pipe to can be better mix rivers, carry out the neutralization with the temperature.

Wherein, it needs to explain, certainly need to connect the water section to link to each other between buffer segment and delivery port, also need to flow into in the buffer segment after a section normal pipeline from delivery port outflow water, and the buffer segment is close more with the delivery port certainly, and the cushioning effect is better, and high temperature water in the heat exchanger when can be better neutralization is being shut off midway.

In the technical scheme, the number of the pipe expanding sections is multiple, and two adjacent pipe expanding sections are connected through a connecting section.

In this technical scheme, expand the pipeline section quantity and be a plurality of, through setting up a plurality of pipeline sections that expand, rivers can both carry out progressively mixing when expanding the pipeline section through one at every turn to the rivers that the temperature is higher and the rivers that the temperature is lower carry out the neutralization to the temperature better, can be closer user's the temperature of predetermineeing more when mixing rivers discharge outside the outlet pipe.

Further, two adjacent pipe expanding sections are connected through a connecting section, the connecting section and the pipe expanding sections can be fixedly connected or detachably connected, the detachable connecting mode can be threaded connection, buckle connection and the like, and the number of the pipe expanding sections is determined and set according to the space size or other actual conditions.

In addition, the pipe diameter of the connecting section can be smaller than, equal to or larger than that of the pipe expanding section, when the pipe diameter of the connecting section is smaller than that of the pipe expanding section, the flow velocity of water flow is reduced when the connecting section passes through the pipe expanding section every time, and the flow velocity of water flow is accelerated when the connecting section passes through the connecting section every time, so that water flow with higher temperature can be better mixed with water flow with lower temperature through the control on the flow velocity of water flow; when the pipe diameter of linkage segment equals or is greater than the pipe diameter of pipe expanding section, also formed buffer portion at the linkage segment promptly to the velocity of flow of rivers that have the difference in temperature in pipe expanding section and linkage segment all can reduce, thereby can fully mix and carry out the neutralization to the temperature.

Specifically, the pipe diameters of the multiple pipe expanding sections can be the same, namely the pipe diameters are the same, so that the pipe expanding sections are convenient to process and more convenient to maintain and replace; the pipe diameter also can be inequality between a plurality of pipe sections that expand, and the pipe diameter reduces gradually, and two strands of rivers that have the difference in temperature all can carry out once mixing when flowing through one pipe section that expands at every turn, because the pipe diameter reduces gradually, so the change of temperature also can be approximately formed the ladder and be constant temperature.

In the above technical scheme, the water receiving section, the pipe expanding section and the connecting section are integrally formed.

In this technical scheme, connect water section, expand pipe section and linkage segment three integrated casting shaping to it is quicker when the installation, and avoided the condition that three's junction leaked.

In addition, after the water tank is integrally formed, the water tank does not need to be independently assembled, the assembling process is not increased, the occupied volume is smaller, and the cost is lower compared with that of an additionally-added water tank.

In the above technical scheme, the two ends of the pipe expanding section are detachably connected with the water receiving section and the connecting section respectively.

In this technical scheme, the both ends of expand section can be dismantled with water receiving section and linkage segment respectively and be connected to the convenience sets up in a flexible way the quantity of expand section, and is convenient for change, maintain expand section.

In the above technical scheme, the pipe diameters of the pipe expanding sections are the same, and the two ends of the pipe expanding sections are respectively provided with the transition pipe sections, and the inner diameters of the transition pipe sections are gradually reduced along the direction from the pipe expanding sections to the outside.

In the technical scheme, the pipe diameters of the pipe expanding sections are the same, so that the pipe diameters of the pipe expanding sections are the same in size, namely the pipe diameters are the same in model, the pipe expanding sections are convenient to process, and the pipe expanding sections are more convenient to maintain and replace. The transition pipe sections are arranged at two ends of the pipe expanding section, the inner diameters of the transition pipe sections are gradually reduced along the outward direction of the pipe expanding section, and the change of the flow speed of water flow flowing through the pipe expanding section can be gradually changed by arranging the transition pipe sections.

In the technical scheme, the number of the pipe expanding sections is at least one, and the ratio of the sum of the lengths of all the pipe expanding sections to the length of the water outlet pipe is 10-90%.

In the technical scheme, the number of the pipe expanding sections can be one or more, the pipe expanding sections can be flexibly arranged according to the buffering requirement in practical use, and further, the buffering effect can be greatly improved by limiting the ratio of the length of the pipe expanding sections to the length of the water outlet pipe to be 10-90%.

In the technical scheme, the ratio of the maximum pipe diameter of the pipe expanding section to the pipe diameter of the connecting section is 1.5-5; and/or the ratio of the maximum pipe diameter of the pipe expanding section to the pipe diameter of the water receiving section is 1.5-5.

In this technical scheme, the biggest pipe diameter through injecing the pipe section that expands is 1.5 ~ 5 times of linkage segment to can select according to the in-service use space and the buffering demand is nimble, experience in order to improve user's use, can understand, the pipe diameter is big more, the cushioning effect is better, but inevitable space takes up more, equally, the biggest pipe diameter through injecing the pipe section that expands is 1.5 ~ 5 times of water receiving section, also can select according to in-service use space and buffering demand are nimble, experience in order to improve user's use.

In the above technical scheme, be equipped with the water inlet on the heat exchanger body, heat exchanger still includes: the water inlet pipe, one end of inlet tube links to each other with the water inlet.

In this technical solution, the water inlet can be arranged at the top, top and side of the heat exchanger body. In addition, the heat exchanger also comprises a water inlet pipe, one end of the water inlet pipe is connected with the water inlet, the water inlet pipe and the water inlet can be fixedly connected or detachably connected, and the detachable connection mode comprises a threaded connection mode, a buckling connection mode and the like.

Further, the water inlet pipe can be a hose or a hard pipe.

In the above technical scheme, the water inlet and the water outlet are respectively arranged at two sides of the heat exchanger body.

In the technical scheme, the water inlet and the water outlet are respectively arranged at two sides of the heat exchanger, so that water can flow out of the water outlet after flowing into the heat exchanger body through the water inlet and being sufficiently heated by the heat exchanger body.

An embodiment of a second aspect of the invention provides a water heating apparatus comprising: the combustor comprises a shell, wherein a combustor is arranged in the shell; and a heat exchanger disposed in the housing, and the burner is capable of heating the heat exchanger.

According to an embodiment of the water heating device, the water heating device comprises a shell and a heat exchanger, the burner and the heat exchanger are arranged inside the shell, and the heat exchanger is heated by the burner, so that water flows into the inside of the heat exchanger body through the water inlet firstly, then the water inside the heat exchanger body is heated by the burner and then can flow out of the water outlet for use.

Wherein the heat exchanger may be located above, below or at a lateral position of the burner.

In the above technical solution, the water heating apparatus further includes: one end of the water mixing valve is communicated with a water outlet pipe of the heat exchanger; and the cold water pipe is communicated with the other end of the water mixing valve, and the water mixing valve can adjust the flow proportion of the water outlet pipe and the cold water pipe.

In this technical scheme, hot water system still includes mixes water valve and cold water pipe, mixes the both ends of water valve respectively with cold water pipe and outlet pipe intercommunication, through setting up the water valve that mixes, can adjust the flow proportion of outlet pipe and cold water pipe to the user is through setting for presetting the temperature, and then mixes the rivers of water valve through the corresponding temperature of flow proportion outflow of adjusting outlet pipe and cold water pipe.

The embodiment of the water heating device provided by the invention has all the beneficial effects due to the arrangement of the heat exchanger in any technical scheme, and the detailed description is omitted.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 shows a schematic structural diagram of a heat exchanger according to an embodiment of the present invention;

FIG. 2 shows a schematic construction of a heat exchanger according to another embodiment of the invention;

FIG. 3 shows a schematic structural view of an outlet pipe according to an embodiment of the present invention;

figure 4 shows a schematic structural view of an outlet pipe according to another embodiment of the present invention;

FIG. 5 shows a schematic structural view of an outlet pipe according to another embodiment of the present invention;

FIG. 6 shows a schematic construction of a heat exchanger according to another embodiment of the invention;

FIG. 7 shows a schematic construction of a heat exchanger according to another embodiment of the invention;

fig. 8 shows a schematic structural view of a hot water apparatus according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 8 is:

1: a heat exchanger body; 2: a water inlet; 3: a water inlet pipe; 4: a water outlet; 5: a water outlet pipe; 51: a water receiving section; 52: expanding a pipe section; 53: a connecting section; 54: a transition duct section; 6: a housing; 7: a burner; 8: a water mixing valve; 9: a cold water pipe.

Detailed Description

In order that the above objects, features and advantages of the embodiments of the present invention can be more clearly understood, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, embodiments of the present invention may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.

A heat exchanger and a hot water apparatus provided according to some embodiments of the present invention will be described below with reference to fig. 1 to 8.

Example one

As shown in fig. 1, one embodiment of the present invention provides a heat exchanger, including: the heat exchanger comprises a heat exchanger body 1, a water inlet 2, a water outlet 4, a water inlet pipe 3 and a water outlet pipe 5. Wherein, water inlet 2 and delivery port 4 all set up on heat exchanger body 1 and both set up respectively in heat exchanger body 1's both sides, and water inlet 2 sets up the position that is close to the bottom in heat exchanger body 1 one side, and delivery port 4 sets up the position that is close to the top in heat exchanger body 1's opposite side, therefore rivers pass through water inlet 2 and get into heat exchanger body 1 inside back, and the rivers of high water level just can be preferentially followed delivery port 4 and flow out.

In addition, the water inlet pipe 3 is connected with the water inlet 2 in a fixed connection mode; the water outlet pipe 5 is connected with the water outlet 4 in a fixed connection mode.

Further, a buffer portion is formed in the water outlet pipe 5, and the buffer portion can reduce the flow velocity of the fluid from the water outlet 4.

It should be noted that the water outlet pipe 5 and the water inlet pipe 3 are both hard pipes, and the strength is high. The water outlet pipe 5 is made of high-temperature resistant material.

In another embodiment, the water inlet 2 is arranged at the top or other location of the heat exchanger body 1.

In another embodiment, the water outlet 4 is provided at the bottom or other location of the heat exchanger body 1.

In another embodiment, the water outlet pipe 5 is detachably connected with the water outlet 4 in a threaded connection, a snap connection or the like.

In another embodiment, the water inlet pipe 3 is detachably connected with the water inlet 2 in a threaded connection, a snap connection or the like.

In another embodiment, the water inlet pipe 3 is a hose, and the movable range is large.

In another embodiment, the water outlet pipe 5 is a hose, and the movable range is large.

Example two

As shown in fig. 2, an embodiment of the present invention provides a heat exchanger, including: the heat exchanger comprises a heat exchanger body 1, a water inlet 2, a water outlet 4, a water inlet pipe 3 and a water outlet pipe 5. Wherein, the water inlet 2 and the water outlet 4 are both arranged on the heat exchanger body 1 and are respectively arranged on the same side of the heat exchanger body 1.

Thereby saving space and being suitable for narrow space layout.

EXAMPLE III

Further, the outlet pipe 5 includes a water receiving section 51, a pipe expanding section 52, and a connection section 53. One end of the water receiving section 51 is communicated with the water outlet pipe 5, the other end of the water receiving section 51 is connected with one end of the pipe expanding section 52, and the other end of the pipe expanding section 52 is connected with the connecting section 53, so that water flowing out of the water outlet 4 flows through the water receiving section 51, the pipe expanding section 52 and the connecting section 53 in sequence and is discharged outwards.

Further, the pipe diameter of the pipe expanding section 52 is larger than the pipe diameters of the water receiving section 51 and the connecting section 53, the maximum pipe diameter of the pipe expanding section is 1.5-5 times of the pipe diameter of the connecting section, the pipe diameters of the water receiving section 51 and the connecting section 53 are the same, and the maximum pipe diameter of the pipe expanding section is 1.5-5 times of the pipe diameter of the water receiving section. Therefore, when the water flows through the expanding pipe section 52, the pipe diameter is increased, so that the area of the cross section of the expanding pipe section 52 perpendicular to the axis is larger than that of the cross section of the water receiving section 51 perpendicular to the axis, and under the condition that the flow of the water flow is not changed, the flow is equal to the cross section multiplied by the speed according to a formula, so that the flow speed of the water flow in the expanding pipe section 52 is reduced, namely the expanding pipe section 52 forms a buffer part, so that the time for the water flow to flow out of the water outlet pipe 5 can be prolonged, and the water flow with higher temperature can be further mixed with the water flow with lower temperature. When the pipe diameter of the pipe expanding section 52 is increased, the pipe expanding section 52 has a larger volume than the water receiving section 51 and the connecting section 53 which have the same length, so that the flow speed can be reduced, two water flows with large temperature difference can be fully mixed in a larger space, and the temperature can be neutralized.

Specifically, water receiving section 51, expand pipe section 52 and linkage segment 53 three all fixed connection, water receiving section 51, expand pipe section 52 and linkage segment 53 integrated into one piece promptly need not independent assembly, does not increase the assembly process, and the shared volume is littleer, and the cost can be lower for additionally increasing the water pitcher.

In another embodiment, the water receiving section 51 and the pipe expanding section 52 are detachably connected, and the detachable connection is a threaded connection, a snap connection, or the like.

In another embodiment, the expanding section 52 and the connecting section 53 are detachably connected by a screw, a snap, etc.

Example four

One embodiment of the present invention provides a heat exchanger comprising: the heat exchanger comprises a heat exchanger body 1, a water inlet 2, a water outlet 4, a water inlet pipe 3 and a water outlet pipe 5. Wherein, water inlet 2 and delivery port 4 all set up on heat exchanger body 1 and both set up respectively in heat exchanger body 1's both sides, and water inlet 2 sets up the position that is close to the bottom in heat exchanger body 1 one side, and delivery port 4 sets up the position that is close to the top in heat exchanger body 1's opposite side, therefore rivers pass through water inlet 2 and get into heat exchanger body 1 inside back, and the rivers of high water level just can be preferentially followed delivery port 4 and flow out.

Further, the pipe diameter of the pipe expanding section 52 is larger than the pipe diameters of the water receiving section 51 and the connecting section 53, and the maximum pipe diameter of the pipe expanding section is 1.5-5 times of the pipe diameter of the connecting section. When water flows through the pipe expanding section 52, the pipe diameter is increased, so that the area of the section, perpendicular to the axis, of the pipe expanding section 52 is larger than that of the section, perpendicular to the axis, of the water receiving section 51, and under the condition that the flow of the water is not changed, the flow is equal to the cross section multiplied by the speed according to a formula, so that the flow speed of the water flow in the pipe expanding section 52 is reduced, namely the pipe expanding section 52 forms a buffer part, so that the time for the water flow to flow out of the water outlet pipe 5 can be prolonged, and the water flow with high temperature can be further mixed with the water flow with low temperature. When the pipe diameter of the pipe expanding section 52 is increased, the pipe expanding section 52 has a larger volume than the water receiving section 51 and the connecting section 53 which have the same length, so that the flow speed can be reduced, two water flows with large temperature difference can be fully mixed in a larger space, and the temperature can be neutralized.

Further, as shown in fig. 3, the pipe diameter of the connecting section 53 is smaller than that of the water receiving section 51. At this time, the pipe diameter of the connecting section 53 is smaller than that of the pipe expanding section 52, the flow speed is reduced when the fluid flows through the pipe expanding section 52 with the larger pipe diameter, the flow speed is increased when the fluid flows through the connecting section 53 with the smaller pipe diameter, and two water flows with larger temperature difference can be better mixed and neutralized through the control of the flow speed.

EXAMPLE five

Further, as shown in fig. 4, the pipe diameter of the connecting section 53 is larger than that of the water receiving section 51 but smaller than that of the pipe expanding section 52. At this time, the pipe diameter of the connecting section 53 is smaller than that of the pipe expanding section 52, the flow speed of fluid flowing through the pipe expanding section 52 with the larger pipe diameter is reduced, the flow speed of fluid flowing through the connecting section 53 with the smaller pipe diameter is increased, and two water flows with larger temperature difference can be better mixed and neutralized through the control of the flow speed.

EXAMPLE six

Further, the pipe diameter of the pipe expanding section 52 is larger than the pipe diameters of the water receiving section 51 and the connecting section 53, and the maximum pipe diameter of the pipe expanding section is 1.5-5 times of the pipe diameter of the connecting section. When water flows through the pipe expanding section 52, the pipe diameter is increased, so that the area of the section, perpendicular to the axis, of the pipe expanding section 52 is larger than that of the section, perpendicular to the axis, of the water receiving section 51, and under the condition that the flow of the water is not changed, the flow is equal to the cross section multiplied by the speed according to a formula, so that the flow speed of the water flow in the pipe expanding section 52 is reduced, namely the pipe expanding section 52 forms a buffer part, so that the time for the water flow to flow out of the water outlet pipe 5 can be prolonged, and the water flow with high temperature can be further mixed with the water flow with low temperature. When the pipe diameter of the pipe expanding section 52 is increased, the pipe expanding section 52 has a larger volume than the water receiving section 51 with the same length, so that the flow speed can be reduced, two water flows with large temperature difference can be fully mixed in a larger space, and the temperature can be neutralized.

Further, as shown in fig. 5, the pipe diameter of the connecting section 53 is not smaller than the pipe diameter of the expanding section 52, that is, the pipe diameter of the connecting section 53 may be equal to or larger than the pipe diameter of the expanding section 52, and further the connecting section 53 may form a buffer portion, so that when two water flows having a temperature difference flow through the expanding section 52 and the connecting section 53, the temperature can be further mixed and neutralized.

EXAMPLE seven

As shown in fig. 6, an embodiment of the present invention provides a heat exchanger including: the heat exchanger comprises a heat exchanger body 1, a water inlet 2, a water outlet 4, a water inlet pipe 3 and a water outlet pipe 5. Wherein, water inlet 2 and delivery port 4 all set up on heat exchanger body 1 and both set up respectively in heat exchanger body 1's both sides, and water inlet 2 sets up the position that is close to the bottom in heat exchanger body 1 one side, and delivery port 4 sets up the position that is close to the top in heat exchanger body 1's opposite side, therefore rivers pass through water inlet 2 and get into heat exchanger body 1 inside back, and the rivers of high water level just can be preferentially followed delivery port 4 and flow out.

Further, two expanding sections 52 are provided, and the two expanding sections 52 are connected to each other by a connecting section 53.

Further, the pipe diameters of the two pipe expanding sections 52 are the same, and the pipe diameters of the two pipe expanding sections 52 are the same, namely the pipe diameters are the same, so that the pipe expanding sections 52 are not only more convenient to process, but also more convenient to install or replace.

Example eight

As shown in fig. 7, an embodiment of the present invention provides a heat exchanger including: the heat exchanger comprises a heat exchanger body 1, a water inlet 2, a water outlet 4, a water inlet pipe 3 and a water outlet pipe 5. Wherein, water inlet 2 and delivery port 4 all set up on heat exchanger body 1 and both set up respectively in heat exchanger body 1's both sides, and water inlet 2 sets up the position that is close to the bottom in heat exchanger body 1 one side, and delivery port 4 sets up the position that is close to the top in heat exchanger body 1's opposite side, therefore rivers pass through water inlet 2 and get into heat exchanger body 1 inside back, and the rivers of high water level just can be preferentially followed delivery port 4 and flow out.

Further, the two enlarged tube sections 52 have different tube diameters. The flow velocity of the fluid will be different when flowing through the two pipe expanding sections 52 with different pipe diameters, therefore, when the two water flows with temperature difference flow through the two pipe expanding sections 52 with different pipe diameters, the two water flows can be mixed to different degrees, and the temperature can be better neutralized.

Example nine

Further, the expanding section 52 is provided with a plurality of expanding sections 52, and each adjacent two expanding sections 52 are connected by a connecting section 53. The pipe diameters of the pipe expanding section 52 and the pipe expanding section 52 may be the same or different.

Example ten

Further, the two ends of the pipe expanding section 52 are respectively provided with a transition pipe section 54, and the inner diameter of the transition pipe section 54 gradually changes in the direction outward from the pipe expanding section 52. By providing the transition section 54, the flow rate of the fluid through the diverging section 52 is gradual and aesthetically enhanced.

EXAMPLE eleven

As shown in fig. 8, the water heating apparatus provided by this embodiment includes a housing 6, a burner 7, the heat exchanger in the above solution, a mixing valve 8 and a cold water pipe 9. Wherein, heat exchanger and combustor 7 all set up in the inside of casing 6 and heat exchanger setting is in the top of combustor 7, heats the heat exchanger through combustor 7. In addition, two ends of the water mixing valve 8 are respectively communicated with the cold water pipe 9 and the water outlet pipe 5 of the heat exchanger, and the water mixing valve 8 can adjust the flow ratio of the water outlet pipe 5 and the cold water pipe 9.

In another embodiment, the heat exchanger is located below or at the side of the burner 7, which is flexible according to the actual situation.

The water heating device provided by the embodiment is provided with the heat exchanger in any one of the embodiments, so that all the beneficial effects are achieved, and the description is omitted.

According to the embodiment of the heat exchanger and the water heating device, the expansion pipe section is arranged on the water outlet pipe, so that the condition of temperature rise and temperature drop when a user turns off water and starts again can be obviously improved, the constant temperature performance of the hot water is maintained, and the user experience is better; compared with the mode of additionally arranging a bypass pipe on the heat exchanger or additionally arranging a bypass pipeline on the water outlet pipe, the technical scheme has low cost and small occupied space.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat exchanger, comprising:

the heat exchanger comprises a heat exchanger body, wherein a water outlet is formed in the heat exchanger body;

and one end of the water outlet pipe is connected with the water outlet, and a buffer part is formed in the water outlet pipe and used for reducing the flow velocity of the fluid from the water outlet.

2. The heat exchanger of claim 1, wherein the outlet tube comprises:

the water receiving section is communicated with the water outlet, and the pipe diameter of the water receiving section is the same as the caliber of the water outlet;

the pipe expanding section is connected with the water receiving section, and the pipe diameter of the pipe expanding section is larger than that of the water receiving section;

the connecting section is connected with the pipe expanding section, water flowing out from the water outlet sequentially passes through the water receiving section, the pipe expanding section and the connecting section and then is discharged outside,

wherein the enlarged tube section forms the buffer.

3. The heat exchanger according to claim 2, wherein the number of the expanded pipe sections is plural, and two adjacent expanded pipe sections are connected by one connecting section.

4. The heat exchanger of claim 2, wherein the water receiving section, the tube expansion section, and the connecting section are integrally formed.

5. The heat exchanger of claim 2, wherein both ends of the pipe expansion section are detachably connected to the water receiving section and the connecting section, respectively.

6. The heat exchanger according to claim 2, wherein the pipe diameters of the pipe expanding sections are the same, and transition pipe sections are respectively provided at both ends of the pipe expanding sections, and the inner diameters of the transition pipe sections are gradually reduced in a direction outward from the pipe expanding sections.

7. The heat exchanger according to claim 2, wherein the number of the expanding pipe sections is at least one, and the ratio of the sum of the lengths of all the expanding pipe sections to the length of the water outlet pipe is 10-90%.

8. The heat exchanger of claim 2,

the ratio of the maximum pipe diameter of the pipe expanding section to the pipe diameter of the connecting section is 1.5-5; and/or

The ratio of the maximum pipe diameter of the pipe expanding section to the pipe diameter of the water receiving section is 1.5-5.

9. The heat exchanger of any one of claims 1 to 8, wherein the heat exchanger body is provided with a water inlet, the heat exchanger further comprising:

the water inlet pipe, the one end of inlet tube with the water inlet links to each other.

10. The heat exchanger of claim 9, wherein the water inlet and the water outlet are provided at both sides of the heat exchanger body, respectively.

11. A water heating apparatus, comprising:

the combustor comprises a shell, wherein a combustor is arranged in the shell;

a heat exchanger as claimed in any one of claims 1 to 10, provided within the housing, and the burner is capable of heating the heat exchanger.

12. The water heating apparatus according to claim 11, further comprising:

one end of the water mixing valve is communicated with a water outlet pipe of the heat exchanger;

a cold water pipe communicated with the other end of the water mixing valve,

the water mixing valve can adjust the flow ratio of the water outlet pipe and the cold water pipe.