Constant temperature device of water heater and water heater

Abstract

This application relates to a constant temperature device for a water heater. The constant temperature device encloses a water storage container. The water storage container is provided with a water inlet part and a water outlet part. Both the water inlet part and the water outlet part are connected to the storage space inside the water storage container. The water outlet part extends from a first side wall to a second side wall opposite to the first side wall within the storage space of the water storage container. The water outlet part has a first water outlet and a second water outlet. The first water outlet is located at one end close to the first side wall, while the second water outlet is located at one end close to the second side wall. The water flow in the water inlet hole flows out evenly and dispersedly, winds around the entire tank body for one circle, mixes and exchanges heat with the constant temperature water in the tank body, and then flows out through the first water outlet and the second water outlet, so as to achieve two-stage water mixing, achieve the purpose of reducing the temperature difference of the fluctuating water temperature, and realize the constant temperature function of reducing the fluctuating temperature difference.

Description

Technical Field

[0001] The present application relates to water heater technology, and in particular to a constant temperature device for a water heater and a water heater. Background Art

[0002] An instant water heater quickly heats cold water to a preset temperature through a high-power heating element. Compared with a storage water heater, the instant water heater has the advantages of a small volume, no need to use a water storage tank to save space, and a fast hot water output speed.

[0003] At present, the instant water heaters on the market mainly include instant electric water heaters and instant gas water heaters. Since there is no water storage tank, the temperature of the stored water is prone to instability and large fluctuations, and the water temperature is hot and cold, resulting in a poor hot water use experience and even scalding accidents. With the development of instant water heaters over the years, the temperature control technology has been greatly improved, but the problem of water temperature rise during shutdown cannot be avoided. Although the prior art has basically controlled the scalding accident problem caused by water temperature fluctuations, the user experience is still inferior to that of storage water heaters, and the water temperature is not as stable as that of storage water heaters. Summary of the Invention

[0004] In order to solve the technical problem of unstable water temperature in the water heater in the prior art, the present application provides a constant temperature device for a water heater and a water heater that can reduce water temperature fluctuations.

[0005] In a first aspect, the present application provides a constant temperature device for a water heater. The constant temperature device packages a water storage container. The water storage container is provided with a water inlet part and a water outlet part. Both the water inlet part and the water outlet part are connected to the storage space inside the water storage container. The water outlet part extends from a first side wall to a second side wall opposite to the first side wall in the storage space inside the water storage container. The water outlet part has a first water outlet and a second water outlet. The first water outlet is located at one end close to the first side wall, and the second water outlet is located at one end close to the second side wall.

[0006] According to an embodiment of the present application, the water storage container includes a first main body and a second main body. The first main body and the second main body are butted to enclose the storage space.

[0007] According to an embodiment of the present application, the water storage container includes the first side wall, the second side wall and a peripheral wall. The first side wall, the second side wall and the peripheral wall enclose the storage space. The water inlet part is arranged on the peripheral wall.

[0008] According to an embodiment of the present application, the water inlet part has an inner end extending into the storage space. A plurality of water inlet holes facing the circumference of the water inlet part are arranged at the inner end of the water inlet part.

[0009] According to an embodiment of the present application, the water storage container further includes a pressure relief valve, and the pressure relief valve is installed at the bottom of the storage space.

[0010] According to an embodiment of the present application, the cross-section of the storage space is circular.

[0011] According to an embodiment of the present application, the water outlet member includes a water outlet pipe interface and an inner pipe. The first end of the inner pipe is connected to the first side wall, the second end of the inner pipe is connected to the second side wall, the first water outlet is provided circumferentially at the first end of the inner pipe, and the second water outlet is provided circumferentially at the second end of the inner pipe.

[0012] According to an embodiment of the present application, the axis of the water outlet member is parallel to the axis of the storage space, and the axis of the water inlet member is perpendicular to the axis of the water outlet member and the axis of the storage space.

[0013] According to an embodiment of the present application, the total opening area of the water inlet holes of the water inlet member is equal to the total area of the water outlet holes of the water outlet member.

[0014] According to an embodiment of the present application, the ratio between the total opening area of the first water outlet holes and the total opening area of the second water outlet holes is: 5% to 10%.

[0015] In a second aspect, the present application provides a water heater, including a water outlet pipe, a heat exchanger, a water inlet pipe, and the constant temperature device as described above.

[0016] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0017] The constant temperature device provided by the embodiment of the present application enables the water flow in the water inlet holes to flow out evenly and disperse, wind around the entire tank body for one circle, mix and exchange heat with the constant temperature water in the tank body, and then flow out through the first water outlet and the second water outlet, so as to achieve double water mixing, achieve the purpose of reducing the temperature difference of the fluctuating water temperature, and realize the constant temperature function of reducing the fluctuating temperature difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other accompanying drawings can also be obtained based on these accompanying drawings without creative efforts.

[0020] Figure 1Schematic diagram of the component decomposition of a constant temperature device for a water heater provided by an embodiment of the present application.

[0021] Figure 2 Schematic diagram of the vertical sectional structure of a constant temperature device for a water heater provided by an embodiment of the present application.

[0022] Figure 3 Schematic diagram of the cross-sectional structure of a constant temperature device for a water heater provided by an embodiment of the present application.

[0023] Figure 4 Schematic diagram of the cross-sectional structure of the water inlet part of the constant temperature device provided by an embodiment of the present application.

[0024] Figure 5 Schematic diagram of the three-dimensional structure of the water inlet part of the constant temperature device provided by an embodiment of the present application.

[0025] Water storage container 1; first main body 11; second main body 12; peripheral wall 14; first side wall 15; second side wall 16; water inlet part 2; water inlet hole 21; water outlet part 3; inner pipe 31; water outlet pipe interface 32; first water outlet 33; second water outlet 34; pressure relief valve 4. Specific embodiments

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0027] The embodiments of the present application provide a new type of constant temperature device. The water inlet part and the water outlet part are arranged and installed in the water storage device. Through technical means such as the installation direction of the water inlet part and the water outlet part and the flow channel configuration, the water flow direction and flow rate distribution in the water storage device are controlled, which is more conducive to the mixing of water flows at different temperatures and reduces the fluctuation of the outlet water temperature.

[0028] The following is an exemplary description of the embodiments of the present application with reference to the attached drawings:

[0029] Figure 1Schematic diagram of the component decomposition of the constant temperature device of a water heater provided by an embodiment of the present application. An embodiment of the present application provides a constant temperature device for a water heater. The constant temperature device wraps the water storage container 1. The water storage container 1 is mainly provided with a water inlet part 2 and a water outlet part 3. Both the water inlet part 2 and the water outlet part 3 are connected to the storage space inside the water storage container 1. The water outlet part 3 extends from the first side wall 15 to the second side wall 16 opposite to the first side wall 15 within the storage space of the water storage container 1. The water outlet part 3 has a first water outlet 33 and a second water outlet 34. The first water outlet 33 is located at one end close to the first side wall 15, while the second water outlet 34 is located at one end close to the second side wall 16.

[0030] The constant temperature device of the water heater in the embodiment of the present application can be installed at the whole machine water outlet end to effectively buffer the water flow with temperature changes, reduce the limit range of water temperature fluctuations, so as to narrow the temperature difference. Improve the water temperature stability performance of the whole machine and enhance the user experience.

[0031] Figure 2 Schematic diagram of the vertical sectional structure of the constant temperature device of a water heater provided by an embodiment of the present application. In the embodiment of the present application, the water storage container 1 includes a first main body 11 and a second main body 12. The first main body 11 and the second main body 12 are butted to enclose the storage space. The first main body 11 and the second main body 12 can respectively have two mutually riveted edges, so as to realize sealed connection through edge riveting.

[0032] In a specific embodiment, the water storage container 1 can be made of a metal material, or can be made of an engineering material such as plastic. It can achieve water storage and interface configuration. On the other hand, a material with heat preservation effect or a heat preservation layer can also be considered to be configured on the outer wall of the water storage container 1.

[0033] In the embodiment of the present application, on the other hand, the combined water storage container 1 can also be regarded as including the first side wall 15, the second side wall 16 and the peripheral wall 14. The first side wall 15, the second side wall 16 and the peripheral wall 14 enclose the storage space, and the cross section of the storage space is circular. And the water inlet part 2 can be arranged on the peripheral wall 14.

[0034] Figure 4 Schematic diagram of the cross-sectional view of the water inlet part of the constant temperature device provided by an embodiment of the present application, Figure 5 Schematic diagram of the three-dimensional structure of the water inlet part of the constant temperature device provided by an embodiment of the present application. In the embodiment of the present application, the water inlet part 2 has an inner end extending into the storage space. A plurality of water inlet holes 21 facing the circumference of the water inlet part 2 are arranged at the inner end of the water inlet part 2. In a specific embodiment, the peripheral wall 14 can be provided with an opening to facilitate the assembly of the water inlet part 2, and then sealed connection is achieved through welding or gluing.

[0035] In the embodiment of the present application, the water outlet member 3 includes a water outlet pipe interface 32 and an inner pipe 31. The first end of the inner pipe 31 is connected to the first side wall 15, and the second end of the inner pipe 31 is connected to the second side wall 16. The first water outlet 33 is disposed circumferentially at the first end of the inner pipe 31, and the second water outlet 34 is disposed circumferentially at the second end of the inner pipe 31.

[0036] The axis of the water outlet member 3 is parallel to the axis of the storage space, and the axis of the water inlet member 2 is perpendicular to the axes of the water outlet member 3 and the storage space.

[0037] The total opening area of the water inlet holes of the water inlet member 2 is equal to the total area of the water outlet holes of the water outlet member 3. The ratio between the total opening area of the first water outlet holes 33 and the total opening area of the second water outlet holes 34 is 6:94.

[0038] As Figure 1 shown, the constant temperature device is composed of a first main body 11 and a second main body 12 to form the entire body frame, which is also the main part for accommodating water storage work. It is provided with a water inlet and a water outlet for connecting pipelines. The water inlet is the water inlet member 2, and a water outlet member 3 is configured at the water outlet. At the same time, a pressure relief valve 4 is provided for the entire constant temperature device, which has both an automatic pressure relief function and a manual drainage function for the whole machine.

[0039] During use, first, the water outlet is composed of an external water outlet joint (for connecting to an external pipeline) and the water outlet member 3. The water outlet member 3 is selected as a blind pipe structure, the top of the blind pipe is sealed, and circular holes (the first water outlets 33) are evenly distributed on the side surface closer to the top. Two opposite small circular holes (the second water outlets 34) are made at the bottom of the blind pipe. When discharging water, multiple large circular holes evenly distributed on the top and the two small circular holes at the bottom discharge water simultaneously.

[0040] The water inlet is the water inlet member 2, which has a specific water inlet structure and can also be used for clamping with an external pipeline, and it is required to be sealed reliably without leakage. At the same time, 6 water inlet holes 21 are evenly distributed at one end in the water storage space.

[0041] Figure 3 It is a schematic cross-sectional view of the structure of the constant temperature device of a water heater provided by the embodiment of the present application. After assembly, the effect is that the first water outlet 34 of the water outlet member 3 is close to the top of the second main body 12, ensuring that the water outlet part is the water flow at the uppermost part of the constant temperature device body, and at the same time is placed on one side of the tank axis away from the water inlet. The water inlet member 2 is arranged at a position close to the middle circumferential wall of the tank, and the plane where the axis of the water outlet member 3 and the axis of the tank are perpendicular to the axis of the water inlet member 2 (as Figure 2 , 3 ). The second water outlet 34 is in the horizontal direction and faces away from the water outlet member 3, which is beneficial to the full mixing of the water flow with fluctuating water temperature.

[0042] The pressure relief valve 4 is placed at the lowest position of the entire water tank. Besides automatically draining water when the water pressure is too high, it is also beneficial for draining the water of the entire water heater when necessary.

[0043] Normally, when continuously in use, the water flow in the constant temperature device is in a constant temperature state, equal to the set outlet water temperature. When the water usage point is briefly closed instantaneously, the water heater stops heating, but there will be a temperature rise during the stop. The water flow temperature in the internal pipeline of the water heater is significantly higher than the set temperature. When the water usage point is opened again, there is still a small amount of cold water in the pipeline that has not been heated (because the water flow signal triggers heating, the water flow acts first and then the heating is implemented, there is a time difference). Therefore, in this common usage situation, the outlet water temperature fluctuates up and down around the set temperature. The water flow with fluctuating water temperature enters the water tank through the water inlet part 2, and the water flow through the water inlet holes is evenly dispersed and flows out, winds around the entire water tank in a circle, mixes and exchanges heat with the constant temperature water in the water tank, and then flows out through the first outlet 33 and the second outlet 34, achieving the purpose of reducing the temperature difference of the fluctuating water temperature and realizing the constant temperature function of reducing the fluctuating temperature difference.

[0044] In the embodiment regarding the first outlet 33, the total area of the first outlet 33 is smaller than the total area of the second outlet 34, and it is set at the bottom. When a large amount of water flow with fluctuating water temperature enters and flows out through the second outlet 34, the original water flow temperature at the bottom has not been fully mixed yet. By injecting the original temperature water flow through the first outlet 33, secondary mixing in the pipe is achieved to reduce the temperature difference. The settings of the first outlet 33 and the second outlet 34, because they are at different positions up and down, there is a time difference when the simultaneously incoming water flow reaches the first outlet 33 and the second outlet 34, which is beneficial for secondary water mixing in the water outlet part 3. That is, the incoming water first reaches the second outlet 34. Then, when the mixed incoming water enters the second outlet 34, the original constant temperature water enters through the first outlet 33, thus realizing secondary water mixing in the water outlet part 3. Similarly, at the end stage of the fluctuating water temperature, when the second outlet 34 is still discharging the fluctuating water temperature, relatively speaking, the water entering through the first outlet 33 is already constant temperature water, and secondary water mixing is also realized. Thus, the effect of mixing water to stabilize the water temperature is optimized by using a certain time difference.

[0045] Through theoretical analysis and actual verification, it is found that the ratio between the total opening area of the first water outlet hole 33 and the total opening area of the second water outlet hole 34 is: 6:94 is the optimal ratio. At the same time, the total opening area of the water inlet holes is equal to the total opening area of the water outlet holes.

[0046] On the other hand, the embodiment of the present application can be considered to provide a water heater, including a water outlet pipe, a heat exchanger, a water inlet pipe, and the constant temperature device as described in the previous embodiment. The constant temperature device is selectively configured in the hot water supply pipe, so that after storing a certain capacity of hot water, the hot water supplied outward can be effectively mixed to reduce the water temperature fluctuation in the water outlet pipe.

[0047] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0048] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A constant temperature device for a water heater, characterized in that, The constant temperature device includes a water storage container (1), the water storage container (1) is provided with a water inlet member (2) and a water outlet member (3), both the water inlet member (2) and the water outlet member (3) are connected to the storage space inside the water storage container (1), the water outlet member (3) extends from the first side wall (15) to the second side wall (16) opposite to the first side wall (15) within the storage space of the water storage container (1), the water outlet member (3) has a first water outlet (33) and a second water outlet (34), the first water outlet (33) is located at one end close to the first side wall (15), and the second water outlet (34) is located at one end close to the second side wall (16); The water inlet member (2) has an inner end extending into the storage space, and a plurality of water inlet holes (21) facing the circumference of the water inlet member (2) are provided at the inner end of the water inlet member (2); The water outlet member (3) includes an inner pipe (31), the bottom end of the inner pipe (31) is connected to the first side wall (15), the top end of the inner pipe (31) is connected to the second side wall (16), the first water outlet (33) is arranged on the circumference of the bottom end of the inner pipe (31), the second water outlet (34) is arranged on the circumference of the top end of the inner pipe (31), the total area of the first water outlets (33) is smaller than the total area of the second water outlets (34), and the total opening area of the water inlet holes of the water inlet member (2) is equal to the total area of the water outlet holes of the water outlet member (3).

2. The constant temperature device according to claim 1, wherein The water storage container (1) includes a first main body (11) and a second main body (12), and the storage space is formed after the first main body (11) and the second main body (12) are butted together.

3. The constant temperature device according to claim 1, wherein, The water storage container (1) includes the first side wall (15), the second side wall (16) and a peripheral wall (14), the storage space is surrounded by the first side wall (15), the second side wall (16) and the peripheral wall (14), and the water inlet member (2) is arranged on the peripheral wall (14).

4. The constant temperature device according to claim 1, characterized in that, The water storage container (1) further includes a pressure relief valve (4), and the pressure relief valve (4) is installed at the bottom of the storage space.

5. The constant temperature device according to claim 1, characterized in that, The cross-section of the storage space is circular.

6. The constant temperature device according to claim 1, wherein The water outlet member (3) further includes a water outlet pipe interface (32).

7. The constant temperature device according to any one of claims 1 to 6, characterized in that, The axis of the water outlet member (3) is parallel to the axis of the storage space, and the axis of the water inlet member (2) is perpendicular to the axes of the water outlet member (3) and the storage space.

8. The constant temperature device according to any one of claims 1 to 6, characterized in that, The ratio between the total opening area of the first water outlets (33) and the total opening area of the second water outlets (34) is: 5% to 10%.

9. A water heater, comprising a water outlet pipe, a heat exchanger, a water inlet pipe and the constant temperature device according to any one of claims 1 to 8.

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