CN111720995A

CN111720995A - Water heater

Info

Publication number: CN111720995A
Application number: CN202010607407.6A
Authority: CN
Inventors: 曾云; 曲绍鹤; 申勇兵
Original assignee: Midea Group Co Ltd
Current assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Priority date: 2017-02-28
Filing date: 2017-02-28
Publication date: 2020-09-29
Anticipated expiration: 2037-02-28
Also published as: CN108507164B; CN108507164A; CN111720995B

Abstract

The invention discloses a water heater, which comprises a liner, a heater, a heat accumulator, a first pipeline and a second pipeline, wherein the liner is provided with an accommodating cavity, the liner is provided with a partition wall, and the accommodating cavity is divided into a heating cavity and a heat accumulation cavity by the partition wall; the heater is arranged in the heating cavity, and the inner container is provided with a water inlet end and a water outlet end which are communicated with the heating cavity; the heat accumulator is a phase change body with the phase change temperature higher than 30 ℃ and is accommodated in the heat accumulation cavity; the first pipeline penetrates through the heat accumulator to be communicated with the water inlet end; the second pipeline with go out water end intercommunication, just the second pipeline with first pipeline passes through the connecting tube intercommunication, be provided with water pump and check valve on the connecting tube, the circulation direction of check valve is for certainly the second pipeline to first pipeline. Thus, the heating time of the hot water can be shortened, and the heating efficiency can be improved.

Description

Water heater

Case information

This application is based on a division of the chinese patent application entitled a water heater with application number 201710116471.2, filed on 28/2/2017, and is incorporated by reference in its entirety.

Technical Field

The invention relates to the field of heat energy equipment, in particular to a water heater.

Background

The water heater is used for heating tap water to output hot water or warm water, the tap water is connected into a pipeline system in the water heater to be used for heating, and a heating device of the water heater heats the tap water at normal temperature into hot water. Generally, the heating time has a large correlation with the heating efficiency of the water heater, and the higher the heating efficiency of the water heater, the shorter the heating time is required.

The existing water heater directly heats the normal-temperature tap water, the temperature rise range of the tap water is large in the heating process, long heating time is needed, and the heating efficiency of the water heater is low.

Disclosure of Invention

The invention mainly aims to provide a water heater, aiming at shortening the heating time of hot water and improving the heating efficiency.

In order to achieve the purpose, the water heater provided by the invention comprises a liner, a heater, a heat accumulator and a first pipeline, wherein the liner is provided with an accommodating cavity, the liner is provided with a partition wall, the accommodating cavity is divided into a heating cavity and a heat accumulation cavity by the partition wall, and the top surface of the heating cavity is higher than the top surface of the heat accumulation cavity; the heater is arranged in the heating cavity, the inner container is provided with a water inlet end and a water outlet end which are communicated with the heating cavity, and the water outlet end is arranged at the top of the heating cavity; the heat accumulator is a phase change body with the phase change temperature higher than 30 ℃ and is accommodated in the heat accumulation cavity; the partition wall is a heat conductor; the first pipeline penetrates through the heat accumulator to be communicated with the water inlet end of the heating cavity.

Preferably, the heating cavity is disposed above the top of the heat accumulation cavity.

Preferably, the water outlet device further comprises a second pipeline, and the second pipeline is communicated with the water outlet end.

Preferably, the first pipeline is arranged in a coil pipe manner, the first pipeline is provided with a plurality of sections of bending sections and a plurality of sections of direct current sections, the plurality of sections of bending sections are connected with the direct current sections after being bent in a semicircular manner, and heat exchange gaps are arranged among the direct current sections.

Preferably, a constant temperature device is further arranged between the first pipeline and the second pipeline which are positioned outside the inner container, and the constant temperature device is provided with a constant temperature water gap communicated with the constant temperature device.

Preferably, the thermostatic device is a thermostatic valve, and the thermostatic nozzle is communicated with the second pipeline and the first pipeline through the thermostatic valve.

Preferably, a check valve for allowing the second pipeline to flow to the first pipeline is arranged between the first pipeline and the second pipeline.

Preferably, a water pump is arranged on one side of the one-way valve close to the second pipeline, and the water pump pressurizes the water flow flowing from the second pipeline to the first pipeline.

Preferably, a heat insulation piece is arranged outside the inner container, and the heat insulation piece is aerogel.

Preferably, the phase change bodies in the heat storage cavity are two layers, the two layers of phase change bodies are not mutually fused, and the phase change point between the two layers of phase change bodies is within 15 ℃.

The water heater preheats water to be added by arranging the preposed heat accumulator, and recovers the waste heat of hot water in the water heater to exchange heat with the preposed heat accumulator, thereby improving the heating speed of the water heater. The inner container of the water heater is provided with an accommodating cavity for heating and heat exchange of water, the inner container of the water heater is provided with a partition wall, the accommodating cavity is divided into a heating cavity and a heat storage cavity by the partition wall, a heater is arranged in the heating cavity and used for heating inlet water, and a water inlet end communicated with water to be heated and a water outlet end for discharging the heating water are arranged in the heating cavity. Set the partition wall to the heat conduction piece, make the hot water in the heating chamber can conduct the heat to the heat accumulation chamber through the partition wall, the heat accumulator holding is at heat accumulation intracavity deposit heat, set up first pipeline in the heat accumulation chamber, first pipeline communicates with the end of intaking in heating chamber, so that the cold water of treating the heating carries out the heat exchange through the heat accumulator with the heat accumulation intracavity earlier, the temperature that makes to treat hot water rises, then get into the heating intracavity through the end of intaking and heat, in the heating process, the range that the temperature risees is little, thereby the rate of heating to intaking has been accelerated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of the internal structure of a water heater according to an embodiment of the present invention;

fig. 2 is a schematic view of the internal structure of another embodiment of the water heater of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Inner container	32	Insulator
11	Containing cavity	40	First pipeline
				111	Heating cavity	41	Bending section
112	Heat storage cavity	42	Direct current section
				113	Water inlet end	50	Second pipeline
114	Water outlet end	60	Constant temperature device
				12	Partition wall	61	Thermostatic valve
13	Outer wall	611	Constant temperature water gap
				20	Heating device	70	One-way valve
30	Heat accumulator	80	Water pump
				31	Phase change body	90	Heat insulation piece

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a water heater.

In an embodiment of the present invention, referring to FIG. 1, solid lines with arrows indicate planes or spaces such as faces, cavities, holes, etc. The water heater comprises an inner container 10, a heater 20, a heat accumulator 30 and a first pipeline 40, wherein the inner container 10 is provided with an accommodating cavity 11, the inner container 10 is provided with a partition wall 12, the accommodating cavity 11 is divided into a heating cavity 111 and a heat accumulation cavity 112 by the partition wall 12, and the top surface of the heating cavity 111 is higher than the top surface of the heat accumulation cavity 112; the heater 20 is disposed in the heating cavity 111, and the inner container 10 has a water inlet end 113 and a water outlet end 114 communicated with the heating cavity 111; the water outlet end 114 is arranged at the top of the heating cavity 111; the heat accumulator 30 is a phase change body with the phase change temperature higher than 30 ℃ and is accommodated in the heat accumulation cavity 112; the partition wall 12 is a heat conductor; the first pipe 40 passes through the heat accumulator 30 and communicates with the water inlet end 113 of the heating chamber 111.

Specifically, referring to fig. 1, in an embodiment, the inner container 10 of the water heater has an accommodating chamber 11 for exchanging heat with water, the inner container 10 of the water heater is provided with a partition wall 12, the accommodating chamber 11 is divided into a heating chamber 111 and a heat storage chamber 112 by the partition wall 12, a heater 20 is arranged in the heating chamber 111 for heating the inlet water, and a water inlet end 113 communicated with water to be heated and a water outlet end 114 for discharging the heated water are arranged in the heating chamber 111. The top surface of the heating cavity 111 is higher than the top surface of the heat accumulation cavity 112, and the water outlet end 114 is arranged at the top of the heating cavity 111, so that water entering the heating cavity 111 can pass through the heat accumulation cavity 112 for pre-preheating. In order to preheat the water to be heated and to make the heating speed faster, the heat accumulator 30 is disposed in the heat accumulation cavity 112, and the heat accumulator 30 may be water, a phase change body, or other heat accumulation media, and the like. The heat storage body 30 may be used to store external heat of the water heater, or may be used to store internal heat of the water heater, for example, by recovering waste heat of heated hot water. The partition wall 12 is a heat conducting member, so that the hot water in the heating cavity 111 can conduct heat to the heat storage cavity 112 through the partition wall 12, and of course, an external heating device can be provided to perform heat exchange and the like on the heat storage body 30, which is not described herein again. The heat storage body 30 stores heat in the heat storage chamber 112, and the first pipe 40 is disposed in the heat storage chamber 112, and the first pipe 40 passes through the heat storage body 30 and exchanges heat with the heat storage body 30. The first pipeline 40 is communicated with the water inlet end of the heating cavity 111, so that cold water to be heated firstly exchanges heat with the heat accumulator 30 in the heat accumulation cavity 112 to raise the water temperature of the water to be heated, and then enters the heating cavity 111 through the water inlet end 113 to be heated.

In view of increasing the heat storage capacity of the heat storage chamber and increasing the heat storage and release rate, referring to fig. 1, in the present embodiment, the heat storage body 30 is a phase change body 31, the phase change point of the phase change body 31 is 30 degrees celsius or more, the phase change body 31 has high latent heat, and high heat can be stored in a certain volume. The first pipe 40 is inserted into the phase change body 31 to fully contact with the phase change body 31, so that the heat charging and discharging time of the phase change body 31 in the heat storage cavity 112 is shortened, and the heat exchange efficiency is increased. The phase change body 31 may be a single-layer phase change body, a double-layer phase change body, etc., and of course, the upper portion of the phase change body 31 is generally provided with an isolating body 32 (not shown) for isolating the phase change body 31 from air, and the isolating body 32 is used for blocking external impurities from entering the phase change body 31 or coming into contact with the phase change body 31 to prevent the phase change body 31 from deteriorating. The composition and structure of the separator 32 are not particularly limited, and may be a liquid, a phase change material, a substance having another form, or the like. The density of the isolation body 32 is generally lower than that of the phase change body 31, so that the isolation body 32 is always positioned at the upper part of the phase change body 31 for shielding isolation.

Referring to fig. 1, it should be clarified that the top surface of the heating chamber 111 is higher than the top surface of the heat accumulation chamber 112, and hot water heated by the heating chamber 112 is discharged from the upper part of the water heater, and further, the heating chamber 111 is disposed above the top of the heat accumulation chamber 112, so that the internal structure of the water heater can be more compact, and the utilization of the internal space can be saved.

In order to better utilize the waste heat of the water heater to heat the phase change body 31, referring to fig. 2, in another embodiment, the water heater further comprises a second pipe 50, and the second pipe 50 is inserted into the phase change body 31 to exchange heat with the phase change body 31. The second pipe 50 is communicated with the water outlet end 114, so that the water outlet end 114 flows out of the heating cavity 111 through the second pipe 50, when the water heater is stopped, the residual heat in the water heater can be conducted to the phase change body 31 through the second pipe 50, and the heat is stored in the heat storage cavity 112 through the phase change body 31. Correspondingly, when the temperature of the hot water in the second pipeline 50 is insufficient, the phase change body 31 releases heat to the second pipeline 50, so that the temperature of the hot water in the second pipeline 50 can be guaranteed, and the reliability is better.

In order to improve the heat exchange efficiency of the phase change body 31 in the heat storage cavity 112, referring to fig. 1 and fig. 2, in this embodiment, the first pipe 40 is in a coil arrangement, and the coil may be in a spiral shape or a grid shape, etc. to increase the heat exchange contact area of the first pipe 40, so that the heat exchange speed between the first pipe 40 and the phase change body 31 is faster. For the purpose of reducing the production cost, preferably, the first pipeline 40 has a plurality of bending sections 41 and a plurality of straight sections 42, the plurality of bending sections 41 are connected to the straight sections 42 after being bent in a semicircular shape, so that the first pipeline 40 has a higher standardization degree, and a heat exchange gap is provided between the straight sections 42 to adjust the distance between the straight sections 42 to prevent the adjacent two straight sections 42 from contacting with each other and affecting the heat exchange efficiency. The heat exchange gaps between the direct current sections 42 are arranged according to the volume in the heat storage device to obtain a larger heat exchange contact area, and further improve the heat exchange efficiency in the heat storage device.

For the purpose of regulating the temperature of the heated water, referring to fig. 2, a thermostat 60 is provided between the first and

second pipes

40 and 50, the thermostat 60 being used for regulating the temperature of the heated water by connecting water to be heated. The thermostat 60 may be provided as a three-way valve, a thermostat valve, or the like, and the thermostat 60 is provided with a thermostatic water port 611, and the temperature-adjusted water is discharged out of the water heater through the thermostatic water port 611. For the purpose of more precise control of the water temperature, the thermostat device 60 is provided as a thermostat valve 61. It is to be clarified that when the flow path from the first pipe 40 to the thermostatic valve 61 is short and much shorter than the flow path from the first pipe 40 to the thermostatic valve 61 after passing through the boiler heater 20. The pressure of the hot water may be much lower than that of the water to be heated, resulting in that most of the water in the thermostatic valve 61 is directly fed in from the first pipe 40, so that the temperature of the water is difficult to adjust. In order to avoid the above situation, the water heater of the present invention is provided with the check valve 70, the second pipe 50 is connected to the first pipe 40 through the check valve 70, and the check valve 70 is connected in parallel with the thermostatic valve 61. It should be clarified that the parallel connection described herein refers to the physical connection of the flow channels in the water heater being a parallel connection, and does not include the connection relationship of the change caused by the flow channel change after the valve control. By providing the check valve 70, the flow path of the water to be heated flowing out of the heater 20 is extended, so that the hot water can more sufficiently enter the thermostatic valve 61. A check valve 70 is arranged between the second pipeline 50 and the first pipeline 40, and the check valve 70 limits the water to flow from the second pipeline 50 to the first pipeline 40 only, so as to prevent the heated water from being retained in the thermostatic valve 61 due to the reduction of the pressure of the heated hot water. In order to further increase the pressure of the hot water, in the present embodiment, a water pump 80 is provided on the side of the check valve 70 close to the second pipe 50, and the water pump 80 pressurizes the water flowing from the second pipe 50 to the first pipe 40. The pressure of the water flow in the second pipe 50 is increased by setting the head of the water pump 80 so that the hot water can flow into the thermostat valve 61 through the second pipe 50 at a higher pressure, thereby allowing the thermostat valve 61 to more precisely adjust the temperature of the water.

In consideration of the heat preservation performance of the inner container 10 of the water heater, referring to fig. 2, in this embodiment, when the water heater is not used, the heat in the heat storage cavity 112 is prevented from exchanging heat with the outside through the outer wall 13 of the inner container 10, so as to prevent heat loss, in this embodiment, the heat insulation member 90 is provided outside the inner container 10, and the heat insulation member 90 may be of various types, such as: insulation jackets, thermal barrier coatings, or other means of insulation. Those skilled in the art can obtain corresponding technical solutions through the embodiments of the present invention and the accompanying drawings, which are not described herein in detail. The heat insulator 90 covers the outer wall 13 of the inner container 10 to isolate the inner container 10 from the outside, thereby performing heat insulation protection. The heat loss of the inner container 10 is avoided, and the heat storage effect of the phase change body 31 is better. The insulation 90 is aerogel. The aerogel has the characteristic of low heat conductivity coefficient and has a better barrier effect on heat conduction. Meanwhile, the thermal insulation piece 90 is made into aerogel, so that the aerogel material has the characteristic of flexibility, and the aerogel can be attached to the outer wall 13 of the inner container 10 to generate certain deformation, so that the aerogel is fully contacted with the outer wall 13 of the inner container 10, and a good thermal insulation effect is achieved. Moreover, the aerogel has the characteristics of light weight, fire resistance, environmental protection and the like, and is suitable for being used as a heat insulation material of a heat storage device so as to reduce the overall weight of the phase change heat storage device.

In order to further increase the heat exchange efficiency, in this embodiment, the phase change bodies 31 in the heat storage cavity 112 are two layers, the two layers of phase change bodies 31 are not mutually fused, the phase change points of the two layers of phase change bodies 31 are within 15 degrees centigrade of phase difference, each phase change temperature point is 15 degrees centigrade apart, when the phase change bodies 31 in each layer undergo phase change, the heat absorption and release speed is high, and the heat absorption and release speed of the phase change bodies 31 in the heat storage cavity 112 is further increased by setting the phase change bodies 31 to be two layers.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A water heater, comprising:

the inner container is provided with an accommodating cavity, and a partition wall is arranged on the inner container and divides the accommodating cavity into a heating cavity and a heat storage cavity;

the heater is arranged in the heating cavity, and the inner container is provided with a water inlet end and a water outlet end which are communicated with the heating cavity;

the heat accumulator is a phase change body with the phase change temperature higher than 30 ℃ and is accommodated in the heat accumulation cavity;

the first pipeline penetrates through the heat accumulator to be communicated with the water inlet end of the heating cavity;

the second pipeline, the second pipeline with go out water end intercommunication, make it passes through to go out the water end the second pipeline flows the heating chamber, just the second pipeline with first pipeline passes through the connecting tube intercommunication, last water pump and the check valve of being provided with of connecting tube, the circulation direction of check valve is certainly the second pipeline to first pipeline.

2. The water heater as claimed in claim 1, wherein said water pump is provided on a side of said check valve adjacent to said second pipe.

3. The water heater according to claim 1, wherein a thermostatic device is further provided between the first pipe and the second pipe outside the inner container, and the thermostatic device has a thermostatic water port communicated therewith.

4. The water heater of claim 3, wherein the water pump is disposed on a side of the one-way valve adjacent to the second conduit; the thermostatic device is arranged on a water outlet pipeline, and one end of the water outlet pipeline is connected with a connecting pipeline and is positioned between the water pump and the one-way valve; the other end of the water outlet pipeline is connected with the first pipeline.

5. The water heater of claim 1, wherein the heating chamber is disposed above a top of the thermal storage chamber; and/or the presence of a gas in the gas,

the partition wall is a heat conductor.

6. The water heater as recited in claim 1 wherein said first conduit is in a coiled arrangement.

7. The water heater as claimed in claim 6, wherein the first pipe has a plurality of bending sections and a plurality of direct current sections, the bending sections are connected with the direct current sections after being bent in a semicircular shape, and heat exchange gaps are arranged between the direct current sections.

8. The water heater as recited in claim 1 wherein said second conduit is inserted through said phase change body for exchanging heat with said phase change body.

9. The water heater of claim 1, wherein a thermal insulation member is disposed outside the inner container, and the thermal insulation member is aerogel.

10. The water heater according to any one of claims 1 to 9, wherein the phase change bodies in the heat storage chamber are two layers, the two layers of phase change bodies are not mutually fused, and the phase change point between the two layers of phase change bodies is within 15 ℃.