Layered heating type water storage tank of electric water heater

Abstract

The utility model relates to the technical field of electric water heaters, and discloses a layered heating type electric water heater water storage tank which comprises a shell provided with a water storage cavity, and a plurality of heat insulation layers fixedly connected with the inner surface of the shell are arranged in the water storage cavity at intervals from bottom to top. The heat insulation layers divide the water storage cavity into a plurality of sub-heating cavities arranged at intervals from bottom to top, a heating pipe and a temperature sensor are arranged in each sub-heating cavity, the sub-heating cavities are sequentially communicated to form a bent flow channel, and a cold water inlet communicated with the bottom end of the bent flow channel is formed in the bottom of the shell. A hot water outlet communicating with the top of the bent runner is formed in the top of the shell. According to the water storage tank, the heat insulation layers are arranged in the shell at intervals, the water storage cavity is divided into the heating sub-cavities, the cross sectional area of the junction of cold water and hot water, the heat convection speed between the cold water and the hot water and the cooling speed of the hot water in the hot water using process are reduced, and when a small amount of hot water needs to be used, only part of water can be heated; and the energy consumption and the hot water use cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric water heaters, in particular to a layered heating type electric water heater water storage tank. Background Art

[0002] Electric water heaters are water heaters that use electricity as energy for heating. According to the different heating power, they are divided into three types: storage type, instant type and quick heating type. Storage type electric water heaters are widely used in homes because of their convenient installation, large water output and stable water temperature. According to the different installation locations, storage type electric water heaters are divided into horizontal (wall-mounted) electric water heaters or vertical (floor-standing) electric water heaters. Due to the constraints of the available indoor area and the maintenance requirements of electric water heaters, horizontal electric water heaters have become the mainstream choice for current users when using electric water heaters. At present, the water storage tanks of horizontal electric water heaters on the market use the physical properties of hot water and cold water to stratify the water temperature. They use one or two water storage tanks, set the water inlet at the bottom of the water storage tank, and set the water outlet above the water storage tank. When water with a predetermined water temperature is needed, the water in the entire water tank needs to be heated. In the process of using hot water, cold water continues to enter the water tank and causes the temperature of the originally heated hot water in the water tank to drop. The water in the water tank needs to be heated repeatedly, resulting in energy waste. The electricity consumed by continuous heating will also increase the cost of using hot water for users. Utility Model Content

[0003] Based on this, it is necessary to provide a stratified heating electric water heater water tank with low energy consumption and low cost for users to use hot water in view of the above-mentioned shortcomings.

[0004] A layered heating electric water heater water tank comprises an outer shell, wherein a water storage cavity is arranged in the outer shell, wherein a plurality of heat insulation layers fixedly connected to the inner surface of the outer shell are arranged in intervals from bottom to top in the water storage cavity, wherein the plurality of heat insulation layers separate the water storage cavity to form a plurality of sub-heating cavities arranged in intervals from bottom to top, wherein each sub-heating cavity is provided with a heating tube and a temperature sensor, and the sub-heating cavities are connected in sequence to form a curved flow channel, wherein a cold water inlet connected to the bottom end of the curved flow channel is provided at the bottom of the outer shell, and a hot water outlet connected to the top of the curved flow channel is provided at the top of the outer shell.

[0005] In one embodiment, the shell is a hollow cylindrical structure, and the axial direction of the shell is parallel to the horizontal direction.

[0006] In one of the embodiments, each of the heat insulation layers is parallel to the axial direction of the outer shell, and each of the heating tubes is extended along the axial direction of the outer shell.

[0007] In one embodiment, the shell includes a cylindrical shell body, a first end cover sealed and fixed at one end of the shell body, and a second end cover sealed and fixed at the other end of the shell body.

[0008] In one embodiment, the length of each insulation layer is smaller than the length of the shell body; one insulation layer is fixed on the first end cover and sealed to the inner wall of the shell body, and the insulation layer adjacent to it is fixed on the second end cover and sealed to the inner wall of the shell body.

[0009] In one of the embodiments, each of the thermal insulation layers is respectively provided with a through hole, and a sewage outlet is provided at the bottom end of the outer shell, and the sewage outlet and the through holes are located on the same vertical line; the layered heating electric water heater water storage tank also includes a cylindrical sealing member that sequentially penetrates the sewage outlet and the through holes, and the cylindrical sealing member is provided with a plurality of sealing rings that correspond one to one to seal and abut against the inner wall or the edge of the through hole.

[0010] In one embodiment, the cylindrical sealing member is a magnesium rod.

[0011] In one of the embodiments, a blocking bolt is provided at the sewage outlet, and the cylindrical blocking member passes through the blocking bolt and is inserted into the water storage cavity to sequentially pass through the through holes of each insulation layer.

[0012] In one embodiment, the diameter of the cylindrical blocking member is smaller than the diameter of each through hole.

[0013] In one of the embodiments, the water storage tank of the stratified heating electric water heater further includes a liquid level sensor, and the liquid level sensor is disposed in the sub-heating chamber adjacent to the hot water outlet.

[0014] The layered heating electric water heater water storage tank of the utility model divides the water storage chamber into multiple sub-heating chambers and forms a curved flow channel by arranging multiple insulation layers at intervals in the shell, thereby reducing the cross-sectional area of ​​the connecting part between two adjacent sub-heating chambers, thereby reducing the cross-sectional area at the junction of cold and hot water and the heat convection speed between cold and hot water, and reducing the cooling speed of hot water during the use of hot water. When a small amount of hot water is needed, only the water in the sub-heating chamber adjacent to the hot water outlet and a few sub-heating chambers around it can be heated, without heating the water in the entire water storage tank, which greatly reduces energy consumption and can reduce the cost of using hot water for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional structure diagram of a water storage tank of a layered heating type electric water heater in one embodiment of the utility model. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0017] See also Figure 1 The utility model discloses a layered heating electric water heater water storage tank 10 with low energy consumption and low cost for users to use hot water. The water storage tank includes a shell 100, a water storage chamber is arranged in the shell 100, and a plurality of heat insulation layers 200 fixedly connected to the inner surface of the shell 100 are arranged from bottom to top in the water storage chamber. The plurality of heat insulation layers 200 separate the water storage chamber to form a plurality of sub-heating chambers 300 arranged from bottom to top. A heating pipe 400 and a temperature sensor 500 are arranged in each sub-heating chamber 300, and each sub-heating chamber 300 is connected in sequence to form a curved flow channel. That is to say, in this embodiment, each sub-heating chamber 300 independently heats water and detects temperature. The bottom of the shell 100 is provided with a cold water inlet 110 connected to the bottom end of the curved flow channel, and the top of the shell 100 is provided with a hot water outlet 120 connected to the top of the curved flow channel. That is to say, in this embodiment, cold water is fed into the water inlet end of the curved flow channel from the bottom of the outer shell 100, flows in the curved flow channel and sequentially flows through each sub-heating chamber 300, flows to the sub-heating chamber 300 at the top of the outer shell 100 and flows out through the hot water outlet 120 at the water outlet end of the curved flow channel, so as to provide hot water for the user.

[0018] In this embodiment, a plurality of heat-insulating layers 200 are provided in the outer shell 100 from top to bottom to separate the water storage chamber to form n stacked sub-heating chambers 300, and the corresponding heating tubes 400 provided in each sub-heating chamber 300 are respectively recorded as heating tube No. 1, heating tube No. 2, heating tube No. 3... heating tube No. n, and correspondingly, the temperature sensors 500 in each sub-heating chamber 300 are recorded as temperature sensor No. 1, temperature sensor No. 2, temperature sensor No. 3... temperature sensor No. n. The sub-heating chambers 300 are connected end to end in sequence to form a continuous S-shaped structure, that is, the curved flow channel of the present solution, thereby dividing the integrated water storage chamber of the outer shell 100 into a tubular curved flow channel to achieve the separation of each layer of sub-heating chambers 300, reduce the area of ​​the junction of water of different temperatures between two adjacent layers of sub-heating chambers 300, and reduce the influence of the temperature of the existing hot water in the outer shell 100 due to the addition of cold water during the use of hot water by reducing the heat convection speed, thereby reducing the cooling rate of the existing hot water in the outer shell 100, especially reducing the cooling rate of the hot water near the hot water outlet 120. In this way, when a small amount of water is used, it is only necessary to heat the water in a few sub-heating chambers 300 near the hot water outlet 120, without heating the water in the entire outer shell 100, thereby avoiding energy waste.

[0019] In one embodiment, the water storage tank 10 of the layered heating electric water heater further includes a liquid level sensor 600, which is disposed in the sub-heating chamber 300 adjacent to the hot water outlet 120. That is, the liquid level sensor 600 is disposed in the sub-heating chamber 300 at the top of the housing 100, and the liquid level sensor 600, each heating tube 400 and the temperature sensor 500 are electrically connected to an external electric water heater controller (such as a PLC controller), so that when the liquid level sensor 600 detects that the water level in the housing 100 reaches a set value, the external controller will control the heating tubes 400 from top to bottom in the curved flow channel to work in sequence, that is, when the water in the water storage tank is heated, it is heated in the order of heating tube No. 1 to heating tube No. n from top to bottom. While the heating tube 400 heats the water in the sub-heating chamber 300 where it is located, the temperature sensor 500 located in the same sub-heating chamber 300 as the heating tube 400 detects the temperature in the sub-heating chamber 300 in real time. After the water temperature of the current sub-heating chamber 300 reaches the set value, the heating tube 400 of the next layer is switched to heat the water in the sub-heating chamber 300 where it is located, and this is repeated to meet the user's water consumption for hot water at a preset temperature. In the process of using hot water, cold water is injected into the curved flow channel from the cold water inlet 110 at the bottom of the shell 100, and the hot water in the sub-heating chamber 300 below the curved flow channel is squeezed into the upper sub-heating chamber 300, and the hot water flows out from the uppermost sub-heating chamber 300. Through the heating of the heating tubes 400 in each sub-heating chamber 300 and the real-time detection and feedback of the temperature sensor 500, the temperature of the hot water flowing out can be kept constant until the cold water reaches the uppermost heating chamber. Compared to a water tank having only a single cavity, the rate at which the hot water temperature drops in the water tank of this embodiment is significantly reduced when the hot water is not used after heating.

[0020] In one embodiment, the shell 100 is a hollow cylindrical structure, and the axial direction of the shell 100 is parallel to the horizontal direction, that is, the shell 100 is arranged in the horizontal direction. Furthermore, each insulation layer 200 is parallel to the axial direction of the shell 100, and each heating tube 400 is extended along the axial direction of the shell 100 to reduce the impact of water flow on the heating tube 400. The lengths of the insulation layers arranged from bottom to top in the shell 100 are the same, and the widths of the insulation layers first increase and then decrease. The width of the insulation layer 200 arranged in the middle of the shell 100 is greater than the widths of the other insulation layers 200, and adjacent sub-heating chambers are connected at the side ends of the shell. The shell 100 includes a cylindrical shell body 130, a first end cover 140 sealed and fixed at one end of the shell body 130, and a second end cover 150 sealed and fixed at the other end of the shell body 130. The length of each insulation layer 200 is less than the length of the shell body 130; one insulation layer 200 is fixed on the first end cover 140 and is sealed to the inner wall of the shell body 130, and the insulation layer 200 adjacent to it is fixed on the second end cover 150 and is sealed to the inner wall of the shell body 130. It can be understood that, assuming that in this embodiment, 2m insulation layers 200 are provided in the outer shell 100, including m left insulation layers and m right insulation layers, each left insulation layer is arranged in parallel at intervals, and one end of each left insulation layer is sealed to the first end cover 140 and the inner wall of the shell body 130, and the other end of each left insulation layer is spaced a preset distance from the second end cover 150 to form a first water passage 151; each right insulation layer is arranged in parallel at intervals, and one end of each right insulation layer is sealed to the second end cover 150. The end cover 150 and the inner wall of the shell body 130 are sealed and fixed, and the other end of each right insulation layer is spaced a preset distance from the first end cover 140 to form a second water passage 141. A right insulation layer is arranged between two adjacent left insulation layers, and a left insulation layer is arranged between two adjacent right insulation layers. In this way, a continuous curved flow channel with an approximately S-shaped structure can be formed in the water storage cavity of the shell 100 through the staggered arrangement of the left insulation layer and the right insulation layer to achieve layered heating of the water storage cavity. In addition, it should be noted that in this embodiment, the insulation layer 200 is made of ceramic material, or the insulation layer 200 is composed of a metal plate integrally formed with the shell 100 and a thermal insulation coating coated on the surface of the metal plate to reduce the heat transfer of water in adjacent sub-heating chambers 300.

[0021] In one embodiment, each insulation layer 200 is provided with a through hole 210, and a drain outlet 160 is provided at the bottom of the housing 100, and the drain outlet 160 and each through hole 210 are located on the same vertical line; the layered heating type electric water heater water storage tank 10 also includes a cylindrical plugging member 700 which is sequentially penetrated with the drain outlet 160 and each through hole 210, and a plurality of sealing rings 710 which are corresponding to each through hole 210 or sealed against the edge of the through hole 210 are sleeved on the cylindrical plugging member 700. Preferably, each sealing ring 710 can be fixedly arranged in the corresponding through hole 210 or fixed at the edge of the corresponding through hole 210. When the cylindrical plugging member 700 is installed, it is only necessary to pass the cylindrical plugging member 700 through the drain outlet 160 and each through hole 210 so that the outer surface of the cylindrical plugging member 700 abuts against the inner surface of the sealing ring 710. In addition, a plugging bolt is provided at the sewage outlet 160 , and the cylindrical plugging member 700 is penetrated by the plugging bolt and inserted into the water storage cavity to sequentially pass through the through holes 210 of each insulation layer 200 .

[0022] When the water tank is in normal use, the cylindrical plugging member 700 blocks the sewage outlet 160 and each through hole 210. The gap between the cylindrical plugging member 700 and the through hole 210 is blocked by the sealing ring 710, so that the water in the adjacent sub-heating chambers 300 can be prevented from flowing through the through hole 210, so as to reduce the speed of heat exchange between the adjacent sub-heating chambers 300. When it is necessary to discharge the sewage in the housing 100, the cylindrical plugging member 700 is pulled out of the water tank, and each through hole 210 is connected with the sewage outlet 160, so that the sewage in each sub-heating chamber 300 flows through the through hole 210 and is discharged through the sewage outlet 160. Further preferably, in this embodiment, the cylindrical plugging member 700 is a magnesium rod. The diameter of the cylindrical plugging member 700 is smaller than the diameter of each through hole 210, so as to facilitate the replacement of the cylindrical plugging member 700 at a later stage and reduce the difficulty of replacing the cylindrical plugging member 700.

[0023] It should be noted that, in order to facilitate the use of hot water, a hot water pipe can be provided extending along the outer surface of the shell 100 and connected to the hot water outlet 120, and the water outlet end of the hot water pipe is located at the bottom of the shell 100 so as to take water from the bottom of the shell 100. However, even in this case, the hot water is still discharged from the sub-heating chamber 300 at the top of the shell 100. In another embodiment, avoidance holes may be provided on each insulation layer 200, and a water outlet hole may be opened at the bottom end of the outer shell 100, the water outlet hole and each avoidance hole are located on the same vertical line, and by providing a water outlet pipe that sequentially penetrates the water outlet holes and each avoidance hole and is inserted into the sub-heating chamber 300 at the top end of the outer shell 100, the hot water in the sub-heating chamber 300 at the top end of the outer shell 100 can be drawn out and discharged from the bottom end of the outer shell 100, and the connection parts of the water outlet pipe and each avoidance hole and the connection parts with the water outlet hole are provided with limited sealing rings to reduce the speed of heat exchange of water in adjacent sub-heating chambers 300 and prevent water leakage. Similarly, at this time, the hot water is still discharged from the sub-heating chamber 300 at the top end of the outer shell 100.

[0024] The above-mentioned layered heating electric water heater water tank 10 divides the water storage chamber into multiple sub-heating chambers 300 and forms a curved flow channel by arranging multiple insulation layers 200 at intervals in the outer shell 100, thereby reducing the cross-sectional area of ​​the connecting part of two adjacent sub-heating chambers 300, thereby reducing the cross-sectional area at the junction of cold and hot water and the heat convection speed between cold and hot water, and reducing the cooling speed of hot water during the use of hot water. When a small amount of hot water is needed, only the water in the sub-heating chamber 300 adjacent to the hot water outlet 120 and a few sub-heating chambers 300 around it can be heated, without heating the water in the entire water tank, which greatly reduces energy consumption and can reduce the cost of using hot water for users.

[0025] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0026] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A water storage tank for a layered heating electric water heater, comprising a shell, wherein a water storage cavity is provided in the shell, characterized in that: A plurality of heat-insulating layers fixedly connected to the inner surface of the outer shell are arranged in intervals from bottom to top in the water storage cavity, and the plurality of heat-insulating layers separate the water storage cavity to form a plurality of sub-heating cavities arranged in intervals from bottom to top, each sub-heating cavity is provided with a heating tube and a temperature sensor, and the sub-heating cavities are connected in sequence to form a curved flow channel, a cold water inlet connected to the bottom end of the curved flow channel is provided at the bottom of the outer shell, and a hot water outlet connected to the top of the curved flow channel is provided at the top of the outer shell.

2. The layered heating electric water heater water storage tank according to claim 1, characterized in that: The shell is a hollow cylindrical structure, and the axial direction of the shell is parallel to the horizontal direction.

3. The layered heating electric water heater water storage tank according to claim 2, characterized in that: Each of the heat insulation layers is parallel to the axial direction of the shell, and each of the heating tubes is extended along the axial direction of the shell.

4. The layered heating electric water heater water storage tank according to claim 2, characterized in that: The shell comprises a cylindrical shell body, a first end cover sealed and fixed at one end of the shell body, and a second end cover sealed and fixed at the other end of the shell body.

5. The layered heating electric water heater water storage tank according to claim 4, characterized in that: The length of each insulation layer is smaller than the length of the shell body; one insulation layer is fixed on the first end cover and sealed to the inner wall of the shell body, and the insulation layer adjacent to it is fixed on the second end cover and sealed to the inner wall of the shell body.

6. The layered heating electric water heater water storage tank according to claim 2, characterized in that: A through hole is respectively provided on each of the insulation layers, and a sewage outlet is provided at the bottom end of the outer shell, and the sewage outlet and the through holes are located on the same vertical line; the layered heating electric water heater water storage tank also includes a cylindrical plugging member that sequentially penetrates the sewage outlet and each through hole, and the cylindrical plugging member is sleeved with a plurality of sealing rings that correspond one to one to the inner wall of each through hole or the edge of the through hole and seal against the through hole.

7. The layered heating electric water heater water storage tank according to claim 6, characterized in that: The cylindrical blocking member is a magnesium rod.

8. The layered heating electric water heater water storage tank according to claim 6, characterized in that: A plugging bolt is arranged at the sewage outlet, and the cylindrical plugging member passes through the plugging bolt and is inserted into the water storage cavity to sequentially pass through the through holes of each insulation layer.

9. The layered heating electric water heater water storage tank according to claim 6, characterized in that: The diameter of the cylindrical blocking member is smaller than the diameter of each through hole.

10. The layered heating electric water heater water storage tank according to claim 1, characterized in that: The water storage tank of the stratified heating type electric water heater also includes a liquid level sensor, which is arranged in the sub-heating chamber adjacent to the hot water outlet.

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